• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A calendar mechanism (10) having a short month calendar drive wheel (25) of less than 30 days, which performs a full rotation per day around a first axis; a date wheel (50) which has an end of month finger (53) and rotates by month; and a short month indexing finger (35), which is arranged on the short month calendar drive wheel (25), which rotates synchronously with the short month calendar drive wheel (25). when moved, and comes to bear against the month end finger (53) to rotate the date wheel (50) at a first angle on the last day of a month among the short months where the number of days of the month is less than or equal to 30 days other than the month of February, and bears against the end-of-month finger (53) to rotate the date wheel (50) at a second angle larger than the first angle on the last day of February. The invention also relates to a movement comprising such a calendar mechanism as well as a timepiece comprising such a movement.
    公开号:CH713425A2
    申请号:CH00142/18
    申请日:2018-02-07
    公开日:2018-08-15
    发明作者:Mori Yuichi
    申请人:Seiko Instr Inc；
    IPC主号:
    专利说明:

    Description
    BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a calendar mechanism, a movement, and a timepiece. 2. Description of the Prior Art [0002] For timepieces linked to a calendar that can display the date and the month, calendar mechanisms are known that perform a two-day date indexing to minimize the correction of the calendar. the date at the end of the month runs, ie for months with 30 days or less.
    For example, Patent Document 1 (Japanese Patent No. 4,624,848) discloses a calendar mechanism comprising a planetary gear mechanism having a month satellite unit which has five drive teeth, and a planetary gear fixed coaxial mount with a date indication roller, and which is in direct drive relationship with a month satellite unit.
    [0004] In addition, the non-patent scientific literature document 1 (oichiro MATSUZAKI, "Chronos, Japanese version", Simsum Media Co., Ltd., dated February 3, 2011, pages 114 to 115) discloses a calendar mechanism including a control cam, a month indicator lock arm which is actuated by the control cam, a drive finger for the month indicator lock arm, a drive finger for a date wheel, and finally a star wheel months (wheel of months) and a date wheel arranged to be coaxial with each other.
    However, according to the prior art disclosed in patent document 1, the configuration is complicated because of the planetary gear mechanism using a plurality of gears. In addition, according to the prior art disclosed in the patent document 1 and the non-patent scientific literature 1, since a date indexation of two days is carried out at the end of a short month, it is necessary to manually perform an additional date indexation each year at the end of February.
    SUMMARY OF THE INVENTION
    [0006] Therefore, the present invention provides a calendar mechanism that can be simply configured and can automatically perform a date adjustment at the end of February, as well as a movement, and a timepiece associated therewith.
    According to the present invention, there is provided a calendar mechanism including a short month calendar drive wheel which rotates per day about a predetermined axis; a date wheel which has an end-of-month finger and rotates by month; and a short end-of-month indexing finger, which is arranged on the short month calendar drive wheel, and rotates synchronously with the calendar drive wheel for short months when moved, and presses against the end-of-month finger to rotate the date wheel by a first angle on the last day of a month among short months where the number of days of the month is less than or equal to 30 days other than the month of February, and comes in support against the end of month finger to rotate the date wheel by a second angle greater than the first angle on the last day of February.
    According to the present invention, without the need to use a complicated planetary gear mechanism as disclosed in the prior art, it is possible to configure a simple configuration calendar mechanism, comprising a gear wheel. short month calendar training, a short month end indexing finger, and a date wheel having an end of month finger. In addition, the index finger end of short month bears against the end of month finger to turn the date wheel at the first angle on the last day of the month among the short months in which the number of days of the month is less than or equal to 30 days other than the month of February, and bears against the month-end finger to rotate the date wheel at a second angle greater than the first angle on the last day of the month from February. Therefore, the number of calendar day indexing days performed at the end of February may be greater than the number of calendar day indexing days performed at the end of another short month, ie say one month among the short months other than February. Therefore, the date indexing at the end of February, which is performed manually according to the prior art, can be performed automatically. Thus, it is possible to provide a calendar mechanism that can be simply configured and is able to automatically index the date to go directly to the following month at the end of February.
    In the proposed calendar mechanism, it is preferable that the calendar mechanism further includes a month cam which is arranged coaxially with the calendar drive wheel for a short month and performs a complete rotation according to a period of time. one year or four years; and a short end-of-month indexing lever which includes a sliding contact portion which is brought into sliding contact with an outer peripheral surface of the cam of the months, is rotatably mounted relative to the date drive wheel for months short, and rotates around the months cam synchronously with the short month calendar drive wheel, and wherein the outer peripheral surface of the months cam has a plurality of first projections that correspond to a short month other than that of February, and a second protruding part which corresponds to the month of February and is formed such that it is larger than the first protruding parts in a circumferential direction about the predetermined axis, in which the finger short month end indexing is arranged on the short end indexing lever, and in which the end of the indexing lever is The short month causes the end-of-month indexing finger to engage with the end-of-month finger when it is in a state where it comes into sliding contact with the first projecting part and the second projecting part.
    According to the present invention, the calendar mechanism comprises the cam of the months which performs a complete rotation according to a period of one year or four years, the short end indexing lever which rotates around the cam of the month, and the outer peripheral surface of the cam of the months comprises a plurality of first projections which correspond to the short months other than that of February, and the second protruding portion which corresponds to that of February. Therefore, the short month-end indexing finger disposed on the short month-end indexing lever can be moved according to the month among the short months other than that of February, February, and another month (months). length during which the number of days in the month is 31) other than the short month. The second projecting portion is formed such that it is larger than the first projecting portion in the circumferential direction about a predetermined axis. Consequently, the period of time during which the short month-end indexing lever is brought into sliding contact with the second projecting portion is longer than that during which the short month-end indexing lever is brought into contact. sliding with one of the first protruding parts. Thus, the period of time during which the end of month short indexing lever causes the engagement of the end-of-month indexing finger with the end-of-month finger on the last day of February is longer than that during which the short end of month indexing lever causes the engagement of the end of month indexing finger with the end of month finger on the last day of the month among the short months other than February. As a result, the short month-end indexing finger may come to bear against the end-of-month finger to rotate the date wheel at the second angle greater than the first angle on the last day of February, and the the number of indexing days of the date made on the last day of February may be greater than the number of indexing days of the calendar carried out at the end of a short month other than that of February. It is thus possible to provide a calendar mechanism that is capable of automatically indexing dates at the end of February.
    In the calendar mechanism, it is preferable that the short month calendar drive wheel comprises an angular adjustment pin which regulates the rotation amplitude of the short month end indexing lever.
    According to the present invention, the rotation amplitude of the indexing lever at the end of the short month is regulated. Therefore, it is possible to prevent the end of month short indexing lever from unintentionally coming in contact with any other component. Therefore, it is possible to remove any occurrence of disturbance in various mechanisms including the calendar mechanism can be removed.
    In the calendar mechanism, it is preferable that the end-of-month finger includes a decompression section that comes into contact with the end-of-month indexing finger to come to bear against the end indexing finger. of short month that runs synchronously with the month drive drive for short runs in a direction away from the end of month finger.
    According to the present invention, the end of month short indexing finger can be pressed in the direction away from the end of month finger. Therefore, it is possible to separate the end-of-month indexing finger from the end-of-month finger in a month (the long month in which the number of days in the month is 31) other than the short month without using d compression member for bearing against the end of month indexing finger runs in the direction away from the end of month finger. Therefore, the short month-end indexing finger can prevent the date wheel from being rotated by pushing the end-of-month finger during months other than a short month. Therefore, it is possible to prevent any malfunction of the calendar mechanism.
    A movement according to the present invention includes the calendar mechanism described above. In addition, a timepiece according to the present invention includes the movement described above.
    According to the present invention, thus provides a calendar mechanism that can be configured simply and is able to automatically transmit the date of the end of February. Therefore, it is possible to obtain a movement and a timepiece that are excellent in terms of reliability and convenience.
    According to the present invention, it is possible to provide a calendar mechanism that can be configured simply and is able to automatically index the date at the end of February.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0018]
    Fig. 1 is a plan view of a timepiece, a movement, and a calendar mechanism according to an embodiment for the invention.
    Fig. 2 is a plan view of a date indexing mechanism according to this embodiment.
    Fig. 3 is a plan view of a month indexing mechanism according to this embodiment.
    Fig. 4 is a block diagram illustrating an energy transmission path in the timing mechanism according to this embodiment.
    Fig. 5 is a view explaining an operation operation of the calendar mechanism according to this embodiment.
    Fig. 6 is a view explaining an operation operation of the calendar mechanism according to this embodiment.
    Fig. 7 is a view explaining an operation operation of the calendar mechanism according to this embodiment.
    DESCRIPTION OF THE EMBODIMENTS
    [0019] Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
    In general, reference is made to a "movement" for a machine body having a control part of a timepiece. Reference is made to a "complete set" of the timepiece for a product in a finished state, ie where a dial, hands, or the like are attached to the movement and where the movement is placed in a timepiece case. Of the two sides of a platen forming a substrate for the timepiece, the side where the crystal of the timepiece case is located, that is to say, the side where the dial is placed is considered to be the "back side" of the movement. In addition, reference is made to a "front side" of the movement as being the side, on both sides of the plate, where the rear cover or bottom of the case of the timepiece case is located, that is, say the opposite side of the dial. Moreover, in the description which follows, reference will be made to CW (clockwise) as being clockwise, and CCW (counterclockwise) as corresponding to the opposite direction of the needles. a watch in each of the plan views in FIG. 1 and the following figures.
    FIG. 1 is a plan view of a timepiece, a movement, and a calendar mechanism according to a preferred embodiment. Fig. 1 is a plan view according to a view taken from the rear side of a movement 100. In addition, in FIG. 1, each component constituting the movement is illustrated as if one penetrated inside a dial 2 for the sake of convenience.
    As illustrated in FIG. 1, the timepiece 1 is provided with a dial 2 comprising an indicator providing information relating to the current time, or the like. The timepiece 1 is provided with an hour hand (not shown) indicating the hours, a minute hand (not shown) indicating the minutes, and a seconds hand (not shown) indicating the seconds.
    In addition, the timepiece 1 has a display area of the month 4 and a display area of the date 6.
    The display area of the month 4 comprises a month display window 4a disposed between the position substantially at 6 o'clock of the timepiece and the center of the timepiece 1. For example, the piece 1 displays the current month to a user by displaying characters indicating the corresponding month (for example, in Fig. 1, the characters "FEB" represent the month of "February") arranged on a display disk of month 5 and which are visible through the display window of months 4a.
    The display area of the date 6 is disposed in a range extending substantially from 12 hours to 6 hours. Timepiece 1 has a date hand 7 indicating a date. The timepiece 1 displays the date to the user by causing the date hand 7 to indicate any of the characters from "1" to "31" written on the dial 2.
    The movement 100 has a winding stem 8 and a winding crown 9 disposed at the distal end of the winding stem 8. The movement 100 can correct the date and the month by removing the winding crown 9 of the housing of the timepiece 1a, and then rotating it in a predetermined direction to drive a date wheel 50 and a wheel of month 80 in rotation (will all be described later).
    The movement 100 has a calendar mechanism 10. The calendar mechanism 10 includes a date indexing mechanism 20 and an indexing mechanism of the months 60. Hereinafter, the calendar mechanism 10 comprising the mechanism of The indexing of the date 20 and the indexing mechanism of the months 60 will be described in detail with reference to their respective illustrative drawings. In addition, the calendar mechanism 10 of the described embodiment is referred to as a semi-perpetual calendar mechanism, that is, which automatically indexes the date from February 28 each year to the first day of the next month.
    [Mechanism for indexing dates of date] [0029] FIG. 2 is a plan view of the date indexing mechanism according to the preferred embodiment proposed.
    As illustrated in FIG. 2, the date indexing mechanism 20 mainly comprises an hour wheel 21, a month drive wheel for short month 25, a short month end index lever 30, a month cam 27, a wheel date indicator drive train 40, a date wheel 50, and a date jumper 56.
    The hour wheel 21 is rotated by the energy supplied and transmitted by a power source (not shown) which is placed inside the timepiece case 1a, such as a motor or a barrel of movement, for example. The hour wheel 21 rotates about a predetermined axis in the CW direction. For example, the rotation of the hour wheel 21 is transmitted to the short month calendar drive wheel 25 by a gear train such as a minute wheel 22 or an intermediate date wheel 23.
    In addition, in the embodiment described, the center of rotation of the hour wheel 21 is the same as the center of rotation of the timepiece 1; nevertheless, the latter is not limited to such an arrangement corresponding to this embodiment, and could be arranged in an arbitrary position of the movement.
    The month drive wheel for short month 25 includes a short month calendar drive gear wheel 25a which meshes with an intermediate date wheel gear 23a of the intermediate date wheel 23. The wheel Short month calendar drive performs one revolution per day (i.e., in 24 hours) about a first axis C1 (predetermined axis) in the CCW direction. The month cam 27 is arranged on the short month calendar drive wheel 25 so that it is coaxially superimposed on the short month calendar drive wheel 25. As will be described later in detail since the cam of the months 27 performs a complete rotation in twelve months, the cam of the months 27 turns to a cycle different from that of the drive wheel of month calendar short 25.
    The end of short month indexing lever 30 is disposed on the date drive wheel for short month 25. The end of short month indexing lever 30 is arranged so that it is extends along an outer edge of the short month calendar drive wheel and has a substantially circular arc shape as a whole. The short end indexing lever 30 is attached to the short month calendar drive wheel 25 in the same axial position as the month cam 27 along a first axis C1, i.e. the same gear plan. The short end indexing lever 30 rotates around the month cam 27 in synchronism with the short month calendar drive wheel 25.
    The short end indexing lever 30 comprises a lever main body 31 which is rotatably mounted on the date drive wheel for a short month 25 about an axis parallel to the first axis C1, a tail 33 extending from the base of the main lever body 31 towards a side opposite to the main lever body 31, a sliding contact finger 34 (sliding contact portion) which projects from a distal end of the main body lever 31, and a short month-end index finger 35. The lever main body 31 extends from the center of rotation in CW direction about the first axis C1. The shank 33 extends from the base of the main lever body 31 in the CCW direction about the first axis C1. The shank 33 has a shorter shape than the main lever body 31. The shank 33 bears against an angular adjustment pin 37 (which will be described later) from outside the date drive wheel for short month 25 and in a radial direction.
    The sliding contact finger 34 protrudes from the distal end of the main lever body 31 towards the inside of the calendar drive wheel for short month 25 in the radial direction. The sliding contact finger 34 is formed such that it can be able to come into sliding contact with an outer peripheral surface of the cam of month 27. The end-of-month indexing finger 35 is meanwhile protruding from the distal end of the lever main body 31 outwardly of the short month calendar drive wheel 25 in the radial direction. The indexing finger of the end of the short month 35 bears against an end of month finger 53 (which will be described later) disposed on the date wheel 50 so as to rotate the date wheel 50. Short end month indexing 30 performs one revolution per day around the first axis C1 in the CCW direction by following the rotation of the date drive wheel for short month 25. Although the operating details will be provided later, for the moment, it can already be indicated that the end-of-month indexing finger 35 rotates while being moved inwards or outwards in the radial direction.
    [0037] The short month calendar drive wheel 25 is provided with the angular adjustment pin 37. The angular adjustment pin 37 comes into contact with the tail 33 of the short end indexing lever 30 from within the calendar drive wheel for short month 25 in the radial direction. The angular adjustment pin 37 regulates a maximum amplitude of rotation of the short month-end indexing lever 30. In other words, the angular adjustment pin 37 prevents the main lever body 31 from the end-of-month indexing lever. The short month 30 may be moved outwardly from the short month calendar drive wheel 25 in the radial direction by a movement exceeding a predetermined displacement amount.
    The cam of the months 27 turns stepwise about the first axis C1 in the CCW direction in increments of 30 ° for each month. The cam of the months 27 is arranged coaxially with the wheel 80 (see Fig. 3), and rotates synchronously with the latter.
    A plurality of protruding portions 27a to 27e are disposed at an outer peripheral surface of the cam of the months 27. The projections 27a to 27e of the cam of the months 27 are respectively arranged in positions corresponding to the short months. (February, April, June, September and November) in which one month comprises 30 days or less, while the outer peripheral surface of the month cam 27 is divided into twelve equal sectors around the first axis C1 each corresponding sequentially to the months of January to December in the CCW direction. Bottom portions corresponding to the recesses between the plurality of projecting portions 27a-27e are formed in positions corresponding to the 31-day long months. In addition, the plurality of projecting portions 27a to 27e are comprised of the first projections 27b to 27e corresponding to the short months other than February (ie, April, June, September and November) and a second one. protruding part 27a corresponding to the month of February.
    The first protruding portions 27b to 27e have a tapered shape, in plan view, from the inside to the outside of the calendar drive wheel for the short month 25 in the radial direction. The first projections 27b to 27e have upper portions disposed at the outer end of the short month calendar drive wheel in the radial direction. The upper portions of the first projections 27b to 27e take cylindrical surface shapes around the first axis C1. The upper portion of the first projecting portion 27b is arranged to face a portion 55 of the month-end finger 53 when the latter is in a position corresponding to that of the 30th day in April. The same reasoning applies to the first protruding parts 27c to 27e for the 30th days respectively of June, September, and November.
    The second projecting portion 27a is arranged such that it has a shape greater than the first projections 27b to 27e in a circumferential direction about the first axis C1. The second projecting portion 27a has a tapered shape, in plan view, from the inside to the outside of the short month calendar drive wheel 25 in the radial direction. The second projecting portion 27a has an upper portion disposed at the outer end of the short month calendar drive wheel in the radial direction. The upper portion of the second projecting portion 27a takes a cylindrical surface shape around the first axis C1. The radius of the upper portion of the second projecting portion 27a is equal to that of the upper portions of the first projecting portions 27b to 27e; however the dimensions of the upper portion of the second projecting portion 27a are larger than those of the upper portions of the first projections 27b to 27e in the circumferential direction about the first axis C1. The upper portion of the second projecting portion 27a is arranged to face the portion 55 of the month-end finger 53 when the latter is in a position corresponding to a period ranging from the 28th day to the 30th day in the month of February.
    The lower parts corresponding to the recesses between the plurality of projections 27a to 27e also take a cylindrical surface shape around the first axis C1. Each of the lower parts is arranged so that it faces the portion 55 of the end-of-month finger 53 when it is in a position corresponding to the period of the 28th day to the 30th day of each corresponding month (c '). that is to say in long months).
    [0043] The short end indexing lever 30 rotates about the first axis C1 while being in a state where the sliding contact finger 34 is able to come into sliding contact with the outer peripheral surface of the cam of the months. 27. The distal end of the short month end indexing finger 35 is positioned at the outermost periphery of the short month calendar drive wheel 25 in the radial direction when in a a state where the sliding contact finger 34 is in sliding contact with the upper portions of the projections 27a to 27e of the cam of the months 27. In addition, the distal end of the end-of-month indexing finger 35 is positioned on the further possible inside of the calendar drive wheel for short month 25 in the radial direction, when the latter is in a state where the sliding contact finger 34 is in sliding contact with the lower portions corresponding to the recesses between the plurality of projections 27a to 27e. Therefore, the month cam 27 causes the short month end indexing finger 35 to move inward or outward in the radial direction of the month drive wheel for short month 25 as a result of pivoting. the short month-end indexing lever 30 which rotates synchronously with the month-end drive wheel for short month 25. Hereinafter, reference will be made, for a position where the end-of-month index finger short 35 is disposed furthest inside the month drive wheel for short month 25 in the radial direction, as being the "retracted position", and at the position where the month-end index finger is short 35 is disposed most peripherally of the short month calendar drive wheel 25 in the radial direction as the "exit position".
    The rotation of the calendar drive wheel for short month 25 is transmitted to the date indicator drive wheel 40 by a date indexing wheel 24, for example. The date indicator drive wheel 40 performs a complete revolution in one day around an axis different from the first axis C1 in the CCW direction (i.e., in 24 hours).
    A date indicator drive finger 42 is disposed in the date indicator drive wheel 40. The date indicator drive finger 42 has a spring 43 in the form of a circular arc. according to a plan view and a contact portion 45 disposed at the distal end of the spring 43. The date indicator drive finger 42 is arranged such that it is superimposed on the drive wheel. of date indicator 40 according to a plan view. The date indicator drive finger 42 is arranged in one piece with the date indicator drive wheel 40, and is rotated synchronously with the date indicator drive wheel 40. The spring 43 is elastically deformable in the circumferential direction and in the radial direction of the date indicator drive wheel 40. The contact portion 45 rotates about the central axis of the indicator indicator drive wheel 40. date 40 following the rotation of the date indicator drive wheel 40, thereby pushing a tooth of the toothing 51 of the date wheel 50 and rotating the date wheel 50.
    The date wheel 50 has a disk shape and the toothing 51 of the date wheel 50 is formed at its external device. The toothing 51 of the date wheel 50 has 31 teeth spaced at an angular pitch of 360731 = approximately 11.6 ° corresponding to the 31 days representing the maximum number of days during a long month. The toothing 51 of the date wheel 50 is pushed once a day by the contact portion 45 of the date indicator drive finger 42, which performs a rotation per day. Consequently, the date wheel 50 rotates about a second axis C2 in a step corresponding to the same angular pitch (approximately 11.6 °) as that of the toothing 51 of the date wheel 50 in the CW direction, by one step each day, and performs a complete revolution per month (ie in 31 days).
    The date wheel 50 comprises the end-of-month finger 53. The end-of-month finger 53 is arranged in the same position as that of the end-of-month indexing lever 30 in the axial direction of the first axis. C1. The end-of-month finger 53 is arranged in such a way that it extends in the radial direction of the date wheel 50. The distal end of the end-of-month finger 53 forms the tapered portion 55 from the inside towards the outside of the date wheel 50 in the radial direction according to a plan view. A lateral surface 55a (compression portion) at the portion 55, which is upstream in the CCW direction about the second axis C2, is inclined outwardly of the date wheel 50 in the radial direction. The distal end of the portion 55 is arranged to penetrate inside the inscribed circle corresponding to the trajectory of the index finger end of short month 35 in the extended position when the date wheel 50 is in a position corresponding to the period from the 28th day to the 30th day of the month.
    When the portion 55 of the end of month finger 53 is positioned so that it faces the cam of the month 27 on the last day of a month (for example, in the state shown in FIG. 2), the short end indexing finger 35 of the short end indexing lever 30, which is in the extended position, can come into contact with the lateral surface 55a of the portion 55 of the finger. Thus, when the sliding contact finger 34 of the end-of-month indexing lever 30 is brought into sliding contact with the upper parts of the projecting portions 27a to 27e of the month cam 27, since the indexing finger of the end of month Short month 35 can no longer move inward of the calendar drive wheel for short month 25 in the radial direction, the portion 55 and the end-of-month indexing finger 35 come into mutual engagement. As a result, the date wheel 50 is pushed against the short month end index finger 35, which rotates with the short month calendar drive wheel 25, and is in turn rotated. In addition, when the sliding contact finger 34 of the end of month short indexing lever 30 is not in sliding contact with the upper portions of the projections 27a to 27e of the month cam 27, the lateral surface 55a of portion 55 pushes the short month-end indexing finger 35 into contact with the lateral surface 55a towards the center of the cam of months 27. Therefore, the end-of-month indexing finger 35 avoids the portion 55 without coming into mutual contact with her.
    The date jumper 56 rests against the date wheel 50. The date jumper 56 is a component for regulating the position of the date wheel 50 in indexed positions during its rotation. The date jumper 56 comprises a spring jumper spring 58 whose distal end 57 is a free end, elastically deformable. The distal end 57 of the spring jumper spring 58 can engage with the toothing 51 of the date wheel 50. The date jumper 56 regulates the rotation of the date wheel 50 via its distal end 57 , which engages with the toothing 51 of the date wheel 50. Therefore, the date wheel 50 can turn step by step each day in a step on the same angle (approximately 11.6 °) that the tooth 51 of the date wheel 50.
    [Mechanism for indexing months] [0051] FIG. 3 is a plan view of the month indexing mechanism according to the preferred embodiment described.
    As illustrated in FIG. 3, the indexing mechanism of the months 60 mainly comprises a date cam 61, a retrograde lever 70 (flyback type), a date needle wheel 67, the wheel 80 months, a jumper months 86 , and a return wheel 78.
    The date cam 61 is synchronized with the date wheel 50 and performs a complete rotation per month (that is to say, every 31 days) in the CW direction around the second axis C2. The outer peripheral surface of the date cam 61 forms a cam surface 62 which is configured as a snail so that its radius gradually increases in the manner of a CCW spiral and has a peripheral portion. outside 63 a maximum distance from the second axis C2, and an inner peripheral portion 64 away from a distance from the second axis C2.
    The retrograde lever 70 is configured as an L as a whole, consisting of a follower portion 71 and a lever main body 73. A connecting portion between the follower portion 71 and the main lever body 73 in the retrograde lever 70, serves as a pivot portion 72, and is rotatably mounted to reciprocate about a predetermined axis.
    The follower portion 71 is formed such that its distal end is bent toward the cam surface 62 of the date cam 61.
    In the main lever body 73, the end of the side opposite the pivot portion 72 has a fan shape, and a toothed portion 74 is formed at the edge thereof. The toothed portion 74 meshes with the date needle wheel 67 (to be described later).
    The retrograde lever 70 is kinematically connected to the return wheel 78 (which will be described later) by the date needle wheel 67. The retrograde lever 70 is pushed in the CW direction about an axis of the pivot portion 72 by the return wheel 78. Therefore, the follower portion 71 is held in abutment against the cam surface 62 of the date cam 61, and is brought into sliding contact with the date cam 61 by rotation. of the date cam 61.
    The follower 71 of the retrograde lever 70 moves relative to the cam surface 62 while coming into sliding contact therewith following the rotation of the date cam 61.
    When the follower portion 71 is positioned in the inner peripheral portion 64, the retrograde lever 70 is located in a position the least remote from the axis of the pivot portion 72, and having its maximum deflection angle in the CW meaning. In what follows, the position in which the retrograde lever 70 is located when it has a maximum deflection angle in the CW direction is considered to constitute the "initial position". In addition, when the follower portion 71 is positioned in the outer peripheral portion 63, the retrograde lever 70 is at a position farthest away from the axis of the pivot portion 72 and has a maximum deflection angle in the CCW reverse direction. In what follows, reference will be made to the position in which the retrograde lever 70 has a maximum deflection angle in the CCW direction as the "end position". In fig. 3, the initial position of the retrograde lever 70 is shown in dotted lines, and the retrograde lever 70 is in the final position, illustrated by a continuous line. Here, as described above, the date cam 61 performs a complete rotation per month. As a result, the retrograde lever 70 moves from the initial position to the final position by also performing one turn per month.
    On the main lever body 73 is disposed an indexing finger months 75. The index finger months 75 is arranged between the pivot portion 72 and the toothed portion 74. The indexing finger months 75 protrudes towards the month wheel 80 disposed on the opposite side to that of the date cam 61 with respect to the main lever body 73. The index finger of the months 75 is rotatably mounted about a predetermined axis of rotation by relative to the main lever body 73. The index finger of the months 75 acts on the wheel of month 80 by rotating it on the last day of each month.
    In addition, a leaf spring 76 is formed in the center of the main lever body 73, and extends in the direction in which the main lever body 73 also extends. The leaf spring 76 is elastically deformable. as a whole, while a lateral end of the toothed portion 74 is attached to the main lever body 73 and the other lateral end of the pivot portion 72 constitutes a free end. The leaf spring 76 abuts against the indexing finger months 75 and tends to rotate around the axis of rotation in the CCW direction, while the end adjoins part of the indexing finger months 75.
    The toothed portion 74 of the retrograde lever 70 meshes with the date needle wheel 67. The date needle wheel 67 is connected to the date hand 7 (see Fig. 1), thereby rotating the date hand 7 indicating the current date. When the retrograde lever 70 is in the home position, the date handwheel 67 is in a state where it is turned to the maximum in the CCW direction. At this time, the date hand 7 indicates "1" among the series of numbers from "1" to "31" indicating the date date written on the dial 2. Moreover, when the retrograde lever 70 is in end position, the date handwheel 67 is in a state where it is rotated at most in the CW direction. At this time, the date hand 7 indicates "31" among the series of numbers from "1" to "31" indicating the date date written on the dial 2. Therefore, the date hand 7 is actuated one step per day following the rotation of the date cam 61 and the movement of the retrograde lever 70.
    In addition, the follower portion 71 of the retrograde lever 70 is moved instantaneously from the outer peripheral portion 63 to the inner peripheral portion 64 due to the compressive force exerted by the return wheel 78, and the retrograde lever 70 is thus moved from the end position to the initial position, so that the date needle wheel 67 rotates very fast in the CCW direction. At this time, the date hand 7 also rotates very quickly in the CCW direction, and instantly switches from the state where it indicates the number "31" indicating the last possible date inscribed on the dial 2 in the state where it indicates the number "1". As a result, the date hand 7 is operated to effect a display including retrograde movement in the fan-shaped display sector 6.
    The wheel 80 months is disposed on the opposite side to the date cam 61 relative to the retrograde lever 70, and is rotatably mounted about the first axis C1. The month wheel 80 has a disc shape, and a month wheel gear portion 81 is formed at its outer peripheral edge. The toothed portion of month wheel 81 has twelve teeth arranged in angular steps of 30 ° corresponding to the twelve months which represent the number of months of the year. The toothed portion of the month wheel 81 is pushed by the index finger of the months 75 disposed in the flyback lever 70 when the retrograde lever 70 moves from the end position to the initial position; since the retrograde lever 70 reciprocates one turn per month, the toothed portion of the month wheel 81 is thus pushed once a month by the index finger of the months 75.
    The jumper months 86 is supported on the wheel of the month 80. The saltire month 86 is a component intended to regulate the angular positioning in the direction of rotation of the wheel of month 80 according to indexed positions, and includes a jumper spring of month 88 whose distal end 87 is a free end elastically deformable. The distal end 87 of the month jumper spring 88 may engage with the month wheel gear portion 81. The month jumper 86 regulates the rotation of the month wheel 80 through the distal end. 87 engaging with the toothed portion of month wheel 81. Therefore, the wheel 80 months rotates stepwise in angular steps of 30 ° in the CCW direction about the first axis C1 in indexed positions corresponding to the months, and performs a full rotation per year.
    In addition, the display disc of the months 5 (see Fig. 1) is disposed on the wheel of the months 80. The display disc of month 5 is disposed coaxially with the wheel of the months 80; it covers the 80-month wheel, and rotates synchronously with the 80's wheel. A series of characters that indicate each month ranging from "JAN" (for January) to "DEC" (for December) are inscribed on the surface of the display disc of month 5 and arranged in angular steps of 30 ° in the CW direction.
    The return wheel 78 is kinematically connected to the retrograde lever 70 via the date handwheel 67, and tends to move the retrograde lever 70 in the direction of the wheel of the month 80. The return wheel 78 has a spiral spring 79 in a central space, while a main body 78a is configured in annular form, for example. In the coil spring 79, one end is attached to a gear train receiver (not shown) of the timepiece 1, and the other end is connected to the main body 78a of the return wheel 78. The Spiral spring 79 is coaxially disposed with the return wheel 78, and has a spiral shape oriented in the CCW direction to extend along the Archimedes curve, for example. The return wheel 78 rotates in the CCW direction, thereby causing the coil spring 79 to retract and reduce in diameter, and to deform elastically.
    The retrograde lever 70 moves from the initial position to the end position, thereby rotating the return wheel 78 in the CCW direction through the date handwheel 67. Therefore, a return compression force is accumulated in the coil spring 79 of the return wheel 78 to rotate the return wheel 78 in the CW direction. In addition, immediately after the retrograde lever 70 has reached the end position and the follower 71 passes the outer peripheral portion 63 of the date cam 61, the return compression force of the spiral spring 79 is released and the wheel return 78 is rotated very quickly in the CW direction. Therefore, the retrograde lever 70 can move instantly from the end position to the home position.
    [Operation] of the mechanism [0070] FIG. 4 is a block diagram illustrating a transmission path of energy in the calendar mechanism according to the described embodiment. In fig. 4, the arrows illustrated by a solid line indicate a direction of energy transmission, and the arrows illustrated by a dotted line indicate a positioning operation, and a double line indicates a coaxial assembly state.
    In what follows, we describe the operation of the calendar mechanism 10 explained above. In the description which follows, the component component reference numbers of the calendar mechanism corresponding to those of FIGS. 1 to 4. In addition, hereinafter, an operation of the calendar mechanism 10 will be described in the case where the date moves to the first day of the following month starting from the first day of a month to the last day. of it.
    As illustrated in FIG. 4, the power supplied by a power source (not shown) such as a motor or a motion barrel is transmitted to the short month calendar drive wheel 25 by a gear train such as the wheel. 21, the minute wheel 22, and the intermediate date wheel 23. Therefore, the short month calendar drive wheel rotates about the first axis C1 in the CCW direction at a speed of one turn per second. day. In addition, the short end indexing finger 35 disposed on the short month calendar drive wheel 25 rotates about the first axis C1 in the CCW direction at the speed of one revolution per day, synchronously with the date drive wheel for short month 25.
    Furthermore, the energy transmitted to the short month calendar drive wheel 25 is transmitted to the date indicator drive wheel 40 by the date indexing wheel 24 meshing with the wheel. For example, the date indicator drive wheel 40 rotates in the CCW direction at the speed of one revolution per day. In addition, the date indicator drive finger 42 disposed on the date indicator drive wheel 40 rotates in the CCW direction at the speed of one revolution per day, in synchronism with the wheel. date indicator drive 40.
    After coming into contact with the toothing 51 of the date wheel 50 of the date wheel 50 following the rotation, the contact portion 45 of the date indicator drive finger 42 pushes the teeth 51 of the date wheel 50 as and when the passage of time. In addition, the moment when the contact portion 45 of the date indicator drive finger 42 comes into contact with the toothing 51 of the date wheel 50 of the date wheel 50 is generally set to correspond to a predetermined time before midnight when the date changes (for example, from 23:00 of the current day to midnight the following day). Then, if the toothing 51 of the date wheel 50 is pushed by the contact portion 45 of the date indicator drive finger 42, and is rotated in the CW direction by a predetermined angle, the distal end 57 of the date jumper 56 and the toothing 51 of the date wheel 50 are released temporarily from each other, and come into engagement again with each other. As a result, the date wheel 50 rotates stepwise at a predetermined angular pitch in the CW direction, and performs a complete rotation per month.
    In addition, the date cam 61, which is kinematically connected to the date wheel 50 and rotates synchronously with the latter; it rotates step by step in the CW direction, and performs a complete rotation a month.
    The follower portion 71 moves from the inner peripheral portion 64 to the outer peripheral portion 63 due to the rotation of the date cam 61, thus moving the retrograde lever 70 from its initial position (position corresponding to the first day of the month) to its final position (position corresponding to the last day of the month). Therefore, the date needle wheel 67 meshing with the toothed portion 74 of the retrograde lever 70 rotates one step in the CW direction one day. In addition, the date hand 7 attached to the date handwheel 67 is indexed from one day to midnight when the date is changed, following the rotation of the date handwheel 67. As described herein above, the calendar mechanism 10 actuates the date hand 7 step by step from the day until the last day of the month.
    Then, when the date is changed from the last day of the month to the first day of the next month, the calendar mechanism 10 actuates the date hand 7 in the following manner.
    First, we will describe the operation for a long month.
    For a long month, since the last day is the 31st day, the indexation of the date of the date at the end of the month is performed only via the date indicator drive wheel 40. Specifically, the date indicator drive finger 42 disposed on the date indicator drive wheel 40 is engaged with the toothing 51 of the date wheel 50 to rotate the date wheel 50 by one notch. at the 31st day of the month long. In other words, it is necessary to avoid the short end-of-month indexing finger 35 relative to the portion 55 of the end-of-month finger 53 for a period extending from the 28th day to the 30th day of the long month.
    FIG. 5 is a view explaining an operation of the calendar mechanism according to the preferred embodiment described and a plan view illustrating the configuration of a portion of the date indexing mechanism on the 28th day of a long month.
    As illustrated in FIG. 5, the cam of the months 27 is arranged such that a lower (hollow) portion is positioned in a portion facing the center of the date wheel 50 at the outer peripheral surface in a long month. Therefore, the short month end indexing finger 35 is in its retracted inward position following the month cam 27 from the 28th day to the 30th day, and is rotated while the time is up. flows during this period without engaging with the end-of-month finger 53. Consequently, the date wheel 50 is kept in a state where its position is constrained by the date jumper 56, without being pushed by the finger of In addition, the date cam 61 rotating synchronously with the date wheel 50 is also stopped without further rotation.
    Then, after being brought into abutment against the toothing 51 of the date wheel 50 following its rotation, the date indicator drive finger 42 disposed on the date indicator drive wheel 40 pushes the teeth 51 of the date wheel 50 while the time continues to flow. Then, if the toothing 51 of the date wheel 50 is pushed by the contact portion 45 of the date indicator drive finger 42 and is rotated in the CW direction by a predetermined angle, the distal end 57 of the date jumper 56 and the toothing 51 of the date wheel 50 are released temporarily from each other, to re-engage each other. As a result, the date wheel 50 and the date cam 61 turn one notch by a predetermined angular pitch. As a result, the date hand 7 changes from an orientation corresponding to that of the 31st day to that of the first day, and is therefore indexed by a single day.
    Then, we will describe the operation of a short month other than February.
    In the case of a short month other than that of February, since the last day of the month is then the 30th calendar, the indexation of the calendar at the end of the month is carried out both by the training wheel of date indicator 40 and the month drive wheel drive for short month 25. More specifically, on the 30th day of a short month other than February, the short end index finger 35 is engaged with the portion 55 of the month end finger 53 to rotate the date wheel 50 by one notch, and the date indicator drive finger 42 disposed in the date indicator drive wheel 40 is engaged with the toothing 51 of the date wheel 50 to rotate the date wheel 50 by one notch. In other words, the end-of-month indexing finger 35 is avoided in relation to the portion 55 of the end-of-month finger 53 in the period from the 28th day to the 29th day of the month) and the end indexing finger The short month 35 is engaged with the portion 55 of the end of month finger 53 to rotate the date wheel 50 one notch on the 30th day of the month for a short month other than that of February.
    FIG. 6 is a view explaining the operation of the calendar mechanism according to the preferred embodiment decreases and a plan view illustrating the configuration of a part of the date indexing mechanism on the 30th day of a court other than that of February .
    As illustrated in FIG. 6, the cam of the months 27 is arranged such that the upper part of the first protruding part corresponding to the previous months among the first protruding parts 27b to 27e face the portion 55 of the end-of-month finger 53 when the latter is in the position corresponding to the 30th calendar of the short month other than the month of February. Therefore, the short month end indexing finger 35 is in its inward retracted position when it follows the month 27 cam on the 28th day and 29th day of the month, and is moved into its output position by the cam of month 27 on the 30th day. When the date wheel 50 is in the position corresponding to the 30th day, the portion 55 of the end-of-month finger 53 is found inside the inscribed circle corresponding to the trajectory of the short month-end indexing lever 30 when the latter is in the out position. Therefore, after having been brought to bear against the end-of-month finger 53 and in mutual engagement with the latter as a result of the rotation of the month-end drive wheel 25, the end-of-month indexing finger Short 35 pushes the portion 55 of the month end finger 53 to rotate the date wheel 50 at a first angle as the time continues to flow. The moment when the end-of-month indexing finger 35 bears against the portion 55 of the end-of-month finger 53 is adjusted to generally correspond to a predetermined time before midnight when the date is changed (for example, from 21 hOO at 22:00). In addition, the moment when the end-of-month indexing finger 35 bears against portion 55 of end-of-month finger 53 can be arbitrarily adjusted by changing phases (i.e., adjusting the position of the contact portion 45 of the date indicator drive finger 42) of the date indicator drive finger 42 and the end of month short indexing finger 35.
    In the preferred embodiment described, the indexing finger end of short month 35 bears against the portion 55 of the finger end of month 53 at a predetermined time before midnight, but the indexing finger of end of short month 35 may come to bear against the portion 55 of the month-end finger 53, for example, between 01:00 and 03:00 in the morning.
    Then, if the end-of-month finger 53 is pushed by the end-of-month indexing finger 35 and the date wheel 50 rotating in synchronism with the end-of-month finger 53 is rotated in the direction CW at a predetermined angle, the distal end 57 of the date jumper 56 and the toothing 51 of the date wheel 50 are released temporarily from one another, before re-engaging again one with the other. As a result, the date wheel 50 and the date cam 61 turn one notch by a predetermined angular pitch. As a result, the date hand 7 changes from an orientation corresponding to the indication of the 30th day to that of the 3rd day, and is therefore indexed by an additional day.
    In addition, after being brought into engagement with the toothing 51 of the date wheel 50 because of its rotation, the date indicator drive finger 42 disposed in the date indicator drive wheel. 40 pushes the teeth 51 of the date wheel 50 while the time continues to flow. Then, if the toothing 51 of the date wheel 50 is pushed by the contact portion 45 of the date indicator drive finger 42 and is rotated in the CW direction by a predetermined angle, the distal end 57 the date jumper 56 and the toothing 51 of the date wheel 50 are released temporarily from each other, before then reengaging with each other. As a result, the date wheel 50 and the date cam 61 turn one notch by a predetermined angular pitch, and the orientation of the date hand 7 thus passes from the indication of the third day to that of the first day. of the following month, and is therefore indexed for one additional day.
    In the case of a short month other than February, the operation described above causes the date wheel 50 and the date cam 61 to rotate two notches per day at a predetermined angular pitch. In other words, this operation causes the date hand 7 to move from the 30th day of the month to the 1st calendar of the following month causing a rapid movement jumping the 31st day.
    Then, we will describe the operation during the month of February.
    In the case of the month of February, since the last day is the 28th day except for a leap year, the indexing of the date at the end of the month is performed both by the date indicator drive wheel. 40 and the month drive wheel drive for short month 25. More specifically, the short month end indexing finger 35 is in mutual engagement with portion 55 of end of month finger 53 to rotate the date wheel. 50 of three notches, and the date indicator drive finger 42 disposed on the date indicator drive wheel 40 is engaged with the toothing 51 of the date wheel 50 to rotate the date wheel 50 a notch on the 28th day of February.
    FIG. 7 is a view explaining the operation of the calendar mechanism according to the preferred embodiment described, and a plan view illustrating the configuration of part of the indexing mechanism of the date on the 28th day of February.
    As illustrated in FIG. 7, the cam of the months 27 is arranged such that the upper part of the second projecting portion 27a faces the portion 55 of the end-of-month finger 53 when it is in a position corresponding to the period from 28th day to the 30th day of February. As a result, the end-of-month indexing finger 35 is returned to its output position under the action of the month-27 cam on the 28th day. In addition, the portion 55 of the end-of-month finger 53 inside the circle indicated by the end of month indexing lever runs in the extended position when the date wheel 50 is in the position corresponding to the period from the 28th day to the 30th day. The upper portion of the second projecting portion 27a is larger than the dimensions of the upper portions of the first projections 27b to 27e in the circumferential direction about the first axis C1. Therefore, the short month end index finger 35 is in the out position for a longer period than in the case of a short month other than February. Therefore, after having been brought to bear against the end-of-month finger 53 following the rotation of the short month calendar drive wheel on the 28th day, the end-of-month short indexing finger 35 the portion 55 of the end of month finger 53 and rotates the date wheel 50 at a second angle greater than the first angle that had been described above when the time continues to flow.
    If the end-of-month finger 53 is pushed by the end-of-month indexing finger 35 and the date wheel 50, driven in rotation synchronously with respect to the month-end finger 53, rotates according to a second angle in the CW direction, disengagement and re-engagement between the distal end 57 of the date jumper 56 and the toothing 51 of the date wheel 50 are repeated three times. As a result, the date wheel 50 and the date cam 61 rotate three notches in a predetermined angular increment. Consequently, the date hand 7 is indexed for a duration of three days in the course of an orientation corresponding to the 28th calendar of the month to the 31st calendar.
    In addition, after having been brought into engagement with the toothing 51 of the date wheel 50 of the date wheel 50 following its rotation, the date indicator drive finger 42 disposed on the wheel of FIG. Date indicator drive 40 pushes the teeth 51 of the date wheel 50 when the time continues to flow. If the toothing 51 of the date wheel 50 is pushed by the contact portion 45 of the date indicator drive finger 42 and rotates by a predetermined angle in the CW direction, the distal end 57 of the date funnel 56 and the toothing 51 of the date wheel 50 are released temporarily from each other, before then re-engaging with each other. As a result, the date wheel 50 and the date cam 61 turn one notch by a predetermined angular pitch. As a result, the date hand 7 changes from an orientation corresponding to the 31st day to the first day of the following month, and is thus indexed by one more day.
    In the case of February, the operation described above thus causes the date wheel 50 and the date cam 61 to rotate four notches per day at a predetermined angular pitch. In other words, this actuation causes the indexing of the date hand 7 to go from a 28th date to the first calendar of the following month by jumping (that is to say, passing rapidly on) the 29th, the 30th, and the 31st date.
    Thus, the date cam 61 turns a single notch on the 31st day of a month long, turns two notches on the 30th day of a short month other than February, or turns four notches during the 28th day of February, causing simultaneously the passage of the follower 71 of the retrograde lever 70 beyond the outer peripheral portion 63 of the date cam 61. After the follower 71 has passed the outer peripheral portion 63, the retrograde lever 70 is instantly moved from the end position to the home position by a restoring compression force exerted by the return wheel 78 (see dashed line in Fig. 3). As a result, the follower portion 71 of the retrograde lever 70 is moved to the inner peripheral portion 64 of the date cam 61.
    At this time, in the case of the last day of a long month, following the movement of the retrograde lever 70 passed from the final position to the initial position, the date handwheel 67 instantaneously rotates in the CCW sense. As a result, the date hand 7 attached to the date handwheel 67 moves instantly from a position indicating "31" of the last day of the month to a position indicating "1" of the first day of the following month.
    In addition, in the case of the 30th day of a short month other than February, in the date needle wheel 67, following the rotation of a notch of the date wheel 50 and the date cam 61 which is caused by the end of month finger 53, the retrograde lever 70 reaches the end position. At this time, the date handwheel 67 turns a notch in the CW direction. In addition, the date hand 7 attached to the date handwheel 67 moves from a position indicating "30" corresponding to the last calendar of the month runs to the position indicating "31".
    Then, similarly to the case of the long month, following the movement of the retrograde lever 70 from the final position to the initial position, the date needle wheel 67 performs an instantaneous retrograde rotation in the CCW direction. As a result, the date hand 7 attached to the date handwheel 67 moves instantly from the position indicating "31" of the last possible day of display to the position indicating "1" of the first day of the following month.
    Moreover, in the case of the 28th day of February, in the date needle wheel 67, following the rotation of three notches of the date wheel 50 and the date cam 61 which is caused by the end-of-month finger 53, the retrograde lever 70 reaches the end position. At this time, the date needle wheel 67 rotates three notches in the CW direction. In addition, the date hand 7 attached to the date handwheel 67 moves from a position indicating "28" corresponding to the last calendar of that month to the position indicating "31".
    [0103] Next, similarly to the case of the long month, in response to the movement of the retrograde lever 70 from the end position to the initial position, the date needle wheel 67 instantaneously rotates backward in the CCW direction. Therefore, the date hand 7 attached to the date handwheel 67 moves instantly from the position indicating "31" from the last possible day of display to the position indicating "1" of the first day of the following month.
    As described above, according to the calendar mechanism 10 corresponding to the mode of preferential embodiment detailed, on the last day of a month long, the date wheel 50 is pushed by the drive finger of date indicator 42, and is rotated by one notch, thereby causing indexing of the date hand 7 to the next day. Moreover, according to the calendar mechanism 10, on the day of a short month other than that of February, after the end-of-month finger 53 has been pushed by the end-month index finger 35, the date wheel 50 rotates one notch, and the date wheel 50 is pushed by the date indicator drive finger 42 to turn an additional notch, thereby causing indexing of the date hand 7 of two days. In addition, according to the calendar mechanism 10, on the last day of February, after the end-of-month finger 53 has been pushed by the end-of-month short indexing finger 35 and the date wheel 50 a Since it has been rotated three notches, the date wheel 50 is pushed by the date indicator drive finger 42 to turn an additional notch, thus causing the date hand 7 to be indexed by four days.
    In addition, when the date is changed from the last day of the month to the first day of the following month, the retrograde lever 70 moves from the final position to the initial position, thus bringing the index finger 75 months to come in compression against the toothed portion of month wheel 81 of the wheel of months 80. Then, if the toothed portion of month wheel 81 is pushed by the indexing finger months 75 and rotates in the CCW direction at a predetermined angle the distal end 87 of the month jumper 86 and the month wheel gear portion 81 are released temporarily from each other before reengaging again with each other. As a result, the month wheel 80 and the month cam 27 rotate a notch at an angular pitch of 30 °. Thus, it is possible to rotate the display disc of months 5 which is nested with the wheel of month 80, and unblocks the passage to the following month. In addition, in this case, the positions of the projections 27a to 27e of the cam of the months 27 are also changed. Therefore, the short end month indexing finger 35 can be moved to correspond to a long month, a short month other than February, and to February.
    The operation described above is performed repeatedly, thereby allowing the calendar mechanism 10 to perform the indexing of the date of the date wheel 50 in steps of one day, and to pass the Date hand 7 to the next day by simple indexing on the last day of a long month, to index the date wheel 50 and the date needle 7 of two days on the last day of a short month other than February, and perform a four-day indexing for the date wheel 50 and for the date hand 7 on the 28th day of February, while at the same time displaying the date. In addition, the calendar mechanism 10 of the present embodiment performs month indexing and month display by rotating the month 5 display disk on the last day of the month.
    As described above in detail, according to the present embodiment, it is possible to configure the calendar mechanism 10 by employing a simple configuration including the date drive wheel for short month 25, the finger of short end month indexing 35, and the date wheel 50 having the month end finger 53 without the need to use a complicated planetary gear mechanism as disclosed in the prior art. In addition, the end-of-month index finger 35 pushes the end-of-month finger 53 on the last day of the month short months other than February, that is, the number of days of a month is exactly equal to 30 days, to rotate the date wheel 50 at the first angle, and pushes the end of month finger 53 on the last day of February to rotate the date wheel 50 at the second angle greater than the first angle. Therefore, the number of calendar day indexing days performed at the end of February may be greater than the number of days of date indexing performed at the end of another short month. Therefore, it is possible to automatically perform the date change at the end of February, while it must be performed manually according to the prior art. Therefore, it is possible to provide a calendar mechanism that can be simply configured and is able to automatically perform the date change at the end of February.
    In addition, the calendar mechanism 10 includes the cam of the months 27 which performs a complete rotation in one year and the short end indexing lever 30 which rotates around the cam of the months 27, and the surface The outer peripheral of the month cam 27 has the plurality of first projections 27b to 27e corresponding to the short months other than February and the second protruding portion 27a corresponding to February. Therefore, the short month-end index finger disposed on the short month-end indexing lever 30 may be moved according to the months to correspond to a short month other than February, February, or a long month.
    Since the second protruding portion 27a has a larger shape than the first projections 27b to 27e about the first axis C1 in the circumferential direction, the period during which the end of month indexing lever 30 is brought to being in sliding contact with the second protruding portion 27a is longer than the period during which the end of month indexing lever 30 is made to be in sliding contact with any of the first protruding portions 27b to 27e. Therefore, the period during which the end-of-month indexing lever runs 30 causes the month-end index finger 35 to engage the end-of-month finger 53 on the last day of February. longer than the period during which the month-end indexing lever 30 causes the month-end indexing finger 35 to engage the end-of-month finger 53 on the last day of a short month other than February. Therefore, the short end indexing finger 35 may push the end of month finger 53 on the last day of February to rotate the date wheel 50 by the second angle larger than the first angle, and the number of days of date indexing carried out at the end of February may be greater than the number of days of calendar indexing performed at the end of the other short months. Therefore, it is possible to provide a calendar mechanism that can automatically transmit the date at the end of February.
    In addition, the short month calendar drive wheel 25 is provided with the angular adjustment pin 37 regulating the amplitude of rotation of the end of short month indexing lever 30. Therefore, for example, in the state where the short end indexing lever 30 is positioned on the side opposite to the date wheel 50 with respect to the first axis C1, or the like, the rotation amplitude of the end indexing lever Short month of month 30 is regulated and it is possible to prevent the short end indexing lever 30 from unintentionally coming into contact with another component. Therefore, the occurrence of disturbances in various mechanisms including the timing mechanism 10 can be suppressed.
    In addition, the end-of-month finger 53 comprises the lateral surface 55a which is brought into contact with the index finger end of short month 35 to bear against the latter, rotating in a synchronized manner with the calendar drive wheel for short month 25, and pushing it in a direction tending to deviate from end-of-month finger 53. Therefore, the end-of-month indexing finger 35 can be pushed into the direction away from the month-end finger 53. It is thus possible to separate the indexing index of the end of the short month of month-end finger 53 for a long month without using a pressing compression member against the end-of-month indexing finger 35 in the direction tending to move it away from the end-of-month finger 53. Consequently, the end-of-month short indexing finger 35 can prevent the date wheel 50 be rotated while being pushed by the end of months of finger 53. Thus, it is possible to prevent malfunction of the timing mechanism 10.
    In addition, the month wheel 80 rotates about the first axis C1, and the date wheel 50 rotates about the second axis C2. In this way, it is possible to freely arrange the display means such as the display disc of the months 5, which is nested in the wheel of month 80, and the date hand 7, which is embedded in the date wheel 50, compared to a configuration according to which the month wheel and the date wheel are arranged coaxially with each other. Therefore, it is possible to provide the calendar mechanism 10 which can be simply configured and whose display layout of the month and the date can be very freely configured.
    According to the movement 100 and the timepiece 1 of the embodiment described, it is possible to provide the calendar mechanism 10 which can be simply configured and can automatically index the date at the end of the month. from February. Therefore, it is possible to provide a movement 100 and a timepiece 1 that are excellent in terms of reliability and convenience of use.
    The present invention is however not limited to the embodiment described above with reference to the drawings, and various variants may be proposed without departing from the scope of the present invention.
    For example, in the embodiment described above, the cam of the months 27 rotates per year synchronously with the wheel of the months 80, but the present invention is not limited to such an embodiment. . For example, the month cam could be set to rotate every four years in sync with the month indicator. In this case, the outer peripheral surface of the month cam would be provided with a second projecting part corresponding to the month of February of a leap year and three second projecting parts corresponding to the month of February of the other non-leap years, and it would be then it is possible to automatically index the date at the end of February of a leap year by suitably adjusting the dimension of each of the second protruding parts. More specifically, the second projecting portion corresponding to the leap year would be made smaller than the other second projecting portions, but still remain larger than the first projecting portion in the circumferential direction about the first axis C1. In this way it is possible to perform a configuration that indexes the date on the 29th day without performing direct indexing the following month on the 28th day of February of the leap year. The sync term used in this section here means that the month cam and the month indicator move at the same rate, and include a case where their rotation angles are the same, and a case where their rotation angles are different. .
    In addition, in the embodiment described above, the calendar mechanism 10 is configured such that the cam of the months 27, the month drive wheel drive runs for 25, and the finger of Short end month indexing 35 rotates about the first axis C1, and the date indicator drive wheel 40 and the date indicator drive finger 42 rotate about an axis different from the first axis C1. However, the present invention is not limited to such an embodiment, and the cam of the months, the month drive drive for short month, the date indicator drive wheel, the indexing finger end of month, and the date wheel drive finger can rotate around the first axis C1 by coaxially arranging the cam of the months, the month drive drive for short month, and the drive wheel of date indicator. Therefore, the calendar mechanism can be reduced in size.
    In addition, in the embodiment described above, the date hand 7 is kinematically connected to the date handwheel 67 and is configured to perform a retrograde movement for the return to the first calendar of the month. next, but the present invention is not limited to such an embodiment. For example, the date indicator could be attached to the date wheel and its needle could be operated to rotate continuously in the same direction.
    权利要求:
    Claims (6)
    [1]
    The described embodiment uses the return wheel 78 which comprises the spiral spring 79 as energy storage element to apply a restoring force on the retrograde lever 70 tending to bring it closer to the wheel of the 80 months. but is not limited to such a configuration. Thus, for example, a coil spring could be used as an energy storage element to act on the flyback lever 70. In addition, the described embodiment uses the display disk of the months 5 as a means of display of months, but is not limited to it. For example, as a means of displaying the months, a configuration could be adopted according to which the inscription of the characters indicating each month is carried by the dial 2 and the indication of the months given by a month hand. In addition, in the embodiment described above, as display means of the date, the date hands 7 and 7B are adopted, but not limited to. For example, as display means of the calendar, it is possible to adopt a configuration according to which the inscription of the characters indicating a day of the month is placed on the date display disk, and the characters indicating each day of the month are displayed since a date window. In addition, configuration elements according to the embodiment described above may be appropriately replaced by known configuration elements without departing from the scope of the present invention. claims
    A calendar mechanism (10) comprising: a short month calendar drive wheel (25) which rotates daily about a predetermined axis (C1); a date wheel (50) which has an end of month finger (53) and rotates by month; and a short month end index finger (35) which is arranged on the short month calendar drive wheel (25), and rotates synchronously with the short month calendar drive wheel (25). ) when moved, and comes to bear against the end of month finger (53) to rotate the date wheel (50) at a first angle on the last day of a month among the short months where the number of days of the month is less than or equal to 30 days other than the month of February, and bears against the month end finger (53) to turn the date wheel (50) at a second angle greater than the first angle on the last day of February.
    [2]
    The calendar mechanism (10) of claim 1, further comprising: a cam of the months (27) which is arranged coaxially with the short month calendar drive wheel (25) and performs a complete rotation according to a period of one year or four years; and a short end-of-month indexing lever (30) which has a sliding contact portion which comes into sliding contact with an outer peripheral surface of the month cam (27), is rotatably mounted relative to the wheel of month calendar drive (25), and rotates around the month cam (27) synchronously with the short month calendar drive wheel (25), the outer peripheral surface of the month cam (27). ) including a plurality of first protruding portions (27b to 27e) each corresponding to one month among the short months other than that of February, and a second protruding portion (27a) corresponding to the month of February and having a larger shape than the first protruding portions (27b to 27e) in a circumferential direction about the predetermined axis (C1), the short end indexing finger (35) being arranged on the short month end indexing lever ( 30), and the short month-end indexing lever (30) causes the end-of-month indexing finger (35) to engage with the end-of-month finger (53) when it is in a state where it comes into sliding contact with the first projecting portion (27b) and the second projecting portion (27a).
    [3]
    The calendar mechanism (10) according to claim 1 or 2, wherein the short month calendar drive wheel (25) comprises an angular adjustment pin (37) which regulates the amount of rotation of the drive lever. short end month indexing (30).
    [4]
    The calendar mechanism (10) according to one of claims 1 to 3, wherein the end of month finger (53) includes a compression portion (55a) which contacts the end indexing finger of short month (35) for abutting against the short end indexing finger (35) which rotates synchronously with the short month calendar drive wheel (25) and pushing it in a direction s' dismissing the end of month finger (53).
    [5]
    Movement (100) comprising the calendar mechanism (10) according to one of claims 1 to 4.
    [6]
    6. Timepiece (1) comprising the movement (100) according to claim 5.
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    同族专利:
    公开号 | 公开日
    JP2018128377A|2018-08-16|
    CN108415234A|2018-08-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3671366A1|2018-12-21|2020-06-24|ETA SA Manufacture Horlogère Suisse|Device for displaying a series of periodic events that form an annual cycle and timepiece comprising such a display device|
    法律状态:
    2021-03-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    JP2017022196A|JP2018128377A|2017-02-09|2017-02-09|Calendar mechanism, movement and watch|
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