• 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:
    The invention relates to a timing mechanism of a new structure for avoiding excessive frictional load and an excessively complicated structure, as well as a timepiece having such a mechanism. A timing mechanism (1) of a timepiece (2) comprises, firstly, a month cam (66) having a cam surface (65) distinguishing between a long month having 31 days and a short month. having 30 days or less and adapted to make one turn per year, secondly, a date indicator (40) including a date tooth (45) and a month end tooth (48), third, an actuating wheel of date indicator (30) comprising a date finger (33) adapted to rotate every 24 hours and act on the date teeth (45) of the date indicator (40) to rotate this date indicator (40) and, fourthly, an actuating lever structure (70) having a hub (71) mounted on a crankpin (36) with friction to overcome in order to rotate the hub (71) around the crankpin (36). offset from the center of rotation of the indicator actuation wheel antiem (30) and which has a first distal end portion constituting a cam follower (75c) arranged to cooperate with the month cam (66) and a second distal end portion constituting an end-of-end advancement finger. short month (78d) intended to act on the end of month tooth (48) of the date indicator (40) to perform an additional one-day advance of the date indicator (40) at the end of a short month.
    公开号:CH705832B1
    申请号:CH02548/12
    申请日:2012-11-27
    公开日:2017-09-29
    发明作者:Suzuki Shigeo
    申请人:Seiko Instr Inc；
    IPC主号:
    专利说明:

    Description
    Description of the invention [0001] 1. Field of the invention [0002] The present invention relates to a calendar mechanism and a timepiece comprising this mechanism.
    [0003] 2. Description of the Prior Art [0004] Concerning a calendar mechanism, various techniques are known to form a mechanism called automatic calendar mechanism that makes the change of months for a long month (a month that has 31 days and which is also called long month in this description) and for a shorter month (a month that is not more than 30 days old and is also called short month in this description) in different ways.
    In an automatic calendar mechanism, from the end of the month (30th day) of a shorter month, other than February, to the first day of a month longer, the date advance is made by a progress an additional day, that is, an additional date advancement, to perform a two-day date advancement; in this combination, different mechanisms have been proposed; in particular, it has been proposed a provision with a date indicator actuating wheel with a ratchet structure adapted to rotate a date indicator separately by means of a date advancement finger for advancement additional date can be made at the end of a shorter month (JP-A-2009-128 119 [atent document 1]).
    In the calendar mechanism according to the patent document 1, to perform an additional date advance of the date indicator at the end of a short month, a rigid finger is provided so as to be capable of translation relative to to the rotation rod of the date indicator actuating wheel as a short month end advancement finger structure operated by a month cam, generating a translation operation by a month cam in a month short and provoking it to be in engagement with the month-end advancement tooth of the date indicator at the end of the month through the translation.
    However, in this case, a positional control in the radial direction of the date indicator actuating wheel must be performed on the rigid finger, so that the rigid finger constituting the end advancement finger structure. of months is retained to be capable of translation in the radial direction of the date indicator actuating wheel in the category of the diameter of the date indicator actuating wheel with respect to the center of rotation of the wheel of the date indicator actuation, and is caused to convert in the radial direction by the month cam in a short month, which requires a rather complicated structure and a high dimensional accuracy is unavoidable for the space that can be occupied by the finger structure support structure and the month cam structure.
    According to a technique also known, the position of the engagement part of the date advancement finger is changed so that the additional date advance can be made between the end of a shorter month and the beginning of one month longer (Japanese Patent No. 2,651,150 [Patent Document 2]).
    [0009] However, in the calendar mechanism according to the patent document 2, an elastic arm portion of the date advancement finger is generally deformed energetically (on days other than the shorter end of the month) to advance only one tooth per day, so that the roughness load (the load applied to the rotation of the gear train) is structurally similar to the increase, which is similar to imply a loss of energy.
    [0010] Different proposals have been made according to the disposition of the date wheel turning the mechanism separately from the date advance finger so that the additional date advancement can be made from the end of a shorter month to the beginning of the date. a longer month (see, for example, JP-A-2005-326 420 [Patent Document 3]).
    However, in the calendar mechanism, for example, in the patent document 3, a planetary gear mechanism with a predetermined number of teeth is employed for a predetermined operation to be performed, which means that it is rather difficult to avoid a very complicated structure. SUMMARY OF THE INVENTION [0012] The present invention has been made in view of the above problems; an object of the present invention is to provide a calendar mechanism having a new structure capable of avoiding excessive frictional load while avoiding an excessively complicated structure, and a timepiece comprising this mechanism.
    To achieve the above purpose, according to the present invention, there is provided a calendar mechanism comprising, firstly, a month cam having a cam surface making a distinction between a long month having 31 days and a short month. having 30 days or less and adapted to make one turn per year, secondly, a date indicator comprising a date tooth and a month end tooth, third, a date indicator actuating wheel including a date finger adapted to make a rotation every 24 hours and act on the date teeth of the date indicator to rotate this date indicator and, fourthly, an actuating lever structure of which a hub is mounted on a crank pin with friction to overcome to be able to rotate this hub around the crank pin offset from the center of rotation of the date indicator actuating wheel and which comprises a first distal end portion constituting a cam follower arranged to cooperate with the month cam and a second distal end portion constituting a short month end advancement finger intended to act on the end of month tooth; the date indicator for performing an additional one-day advance of the date indicator at the end of a short month.
    In the calendar mechanism according to the present invention: - the hub of the actuating lever structure is mounted on a crank pin with friction to be overcome to be able to rotate the hub around the crankpin relative to the center of rotation the date indicator actuating wheel, so that the actuating lever structure rotates with the date indicator actuating wheel; the actuating lever structure comprises a first distal end portion constituting a cam follower cooperating with the month cam, so that the cam follower is pressed against the month cam when the actuating lever structure rotates; with the date indicator actuating wheel; the hub of the actuating lever structure is mounted frictionally on the crank pin of the date indicator actuating wheel, so that when the cam follower is pressed against the month cam, the lever structure actuation makes a relative rotation relative to the crank pin; the actuating lever structure comprises a second distal end portion forming a short month end advancement finger designed to act on the end of month tooth of the date indicator to perform an additional advancement of a day of the date indicator at the end of a short month, so that at the end of a short month, the hub of the actuating lever structure, whose hub is frictionally mounted with the crank pin and whose first distal end portion constituting a cam follower is pressed against the month cam, rotates relative to the crank pin under the control of the month cam, and thereby doing the second part of distal end forming a short month end advancement finger is engaged with the month end tooth of the date indicator to perform an additional advance of a tooth of the date indicator.
    In other words, in the calendar mechanism according to the present invention, at the end of a long month, the month cam sets the position or moves the actuating lever structure by means of the cam follower of the actuating lever structure to relieve the end finger of the short month end so that the second distal end portion of the month-end advancement finger short of the actuating lever structure does not does not come into contact with the end-of-month tooth of the date indicator. That is, in the calendar mechanism according to the present invention, it is only necessary to provide the date indicator actuating wheel with the actuating lever structure and to perform the additional advancement one day of the date indicator at the end of a short month, so that it is possible to avoid an excessively complicated structure; furthermore, it is only necessary that a frictional load between the actuating lever structure and the crankpin is large enough to cause the actuating lever structure to rotate with the date indicator actuating wheel, so that that it is possible to avoid the frictional load from being increased to an excessive degree. While, typically, the month cam does one trick per year, it can also take a turn in several years if that is desired.
    In a calendar mechanism according to an embodiment of the present invention, the date indicator actuating wheel comprises a disk-shaped date indicator actuating wheel main body adapted to make a display. rotation every 24 hours, a date pin mounted at an off-axis position on the date indicator actuating wheel main body, and a date finger provided coaxially with the indicator actuating wheel main body of date to be able to make a relative rotation relative to the main body of the date indicator actuating wheel and adapted to be rotated by the date pin, the date finger being equipped with the crank pin engaged with friction in the hub of the actuating lever structure.
    In this case, the date finger is currently formed as a rigid member, and the hub of the actuating lever structure is mounted frictionally with the crank pin of the date finger. However, if this is desired, it is also possible to build the crankpin on the date indicator actuating wheel main body part itself, and to associate with friction the hub of the lever structure of actuation with the crankpin.
    In a calendar mechanism according to an embodiment of the present invention, the actuating lever structure comprises integrally a first lever portion connecting the hub and the first distal end portion, and a second lever portion. connecting the hub and the second distal end portion. In this case, the first lever portion and the second lever portion may be formed as resilient lever portions (arm portions) capable of elastic deformation. However, if desired, the first and second distal end portions should also be formed by two different portions of a single flat plate portion, namely two end edge portions. In the case where the first and second deformation lever portions are provided, the short end advancement finger of the second distal end portion is typically provided with a recess at the distal end surface for it can be easily engaged with the end-of-month tooth of the date indicator, and the second lever portion is shaped such that its side surface in a close vicinity of the end-of-month tooth assumes a convex configuration externally so that the second lever portion can easily undergo elastic deformation.
    In a calendar mechanism according to one embodiment of the present invention, the second lever portion is capable of elastic deformation, and the end of month tooth causes the second lever portion to undergo elastic deformation with the actuation of the date indicator by the jumper at the end of a short month, thus leaving the distal end portion of the second lever portion.
    In this case, at the time of the jump control of the date indicator at the end of a short month, that is to say, at the time of completion of the jump control of the date palm at the end of a normal date advancement at the end of a short month, the end of month tooth causes the second lever part to undergo an elastic deformation to allow it to be located to abandon the part distal end of the second lever part. The end of month tooth at the disengaged position is still engaged with the distal end portion (the second distal end portion) of the second lever portion within several hours, making possible the second distal end portion. makes an additional date advance.
    In a calendar mechanism according to an embodiment of the present invention, the first distal end portion consists of a pin-shaped cam follower portion at the distal end of the first lever portion, while the pin-shaped cam follower portion is attached to the cam surface of the month cam and the month cam consists of a plate-shaped member, the portion of the first lever portion other than the follower portion of pin-shaped cam and the month cam consisting of the plate-shaped member being able to come one above the other without interfering.
    In this case, the center of rotation of the date indicator actuating wheel may be at a position in a vicinity close to an outer peripheral surface of the month cam, making it possible to reduce the size in the plan view. However, if this is desired, the first distal end portion may be located substantially in the same plane as the first lever portion.
    In a calendar mechanism according to one embodiment of the present invention, the end of month tooth of the date indicator and a month advancement tooth able to act on an intermediate wheel of advancement of months, to rotate this intermediate month advancing wheel provided to rotate a concentric month star with the month cam, are provided at the same position or at positions close to each other according to the peripheral direction of the date indicator.
    In this case, it is possible to reduce the size. In this case, the end of month tooth and the month advance tooth are typically provided at different positions of the date indicator in the direction of the thickness. However, if desired, the end-of-month tooth and the month-forward tooth may also be formed at positions spaced from one another in the peripheral direction.
    In the calendar mechanism according to one embodiment of the present invention, the entire cam surface of the month cam is continuous and curved so as to be smooth.
    In this case, the degree of freedom in terms of movement of the part constituting the cam follower can be increased, and it is possible to suppress the size in the plan view of the object above, the piece timepiece according to the present invention has a timing mechanism as described above.
    Brief description of the drawings [0027]
    Fig. 1 is an exterior explanatory view, as seen from the dial side, of a timepiece according to a preferred embodiment of the present invention equipped with a calendar mechanism according to a preferred embodiment of the present invention.
    Fig. 2 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating approximately 3:30 pm on the 29th of April.
    Fig. 3 is an explanatory sectional view of a part of the timepiece of FIG. 2.
    Fig. 4 is an explanatory sectional view of another part of the timepiece of FIG. 2.
    Fig. 5 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating around 9 pm on April 30th.
    Fig. 6 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 10 hours 44 minutes in the evening on the 30th of April.
    Fig. 7 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating midnight April 30 (in the state in which the top of a jump control finger portion of a date jumper is engaged with the top of a tooth).
    Fig. 8 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating approximately midnight on April 30 (in the state in which the top of the finger portion of the jump control has passed the top of the tooth).
    Fig. 9 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about midnight on May 1 (in the state in which the jump control finger portion of the jumper was completely lowered between the adjacent teeth).
    Fig. 10 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 0 hours 32 minutes on May 1 (in the state in which the additional date advancement is started at the end of a short month).
    Fig. 11 is an enlargement of a portion of FIG. And comprises two parts, of which part (a) is an explanatory view in partial enlarged plane, and part (b) is an explanatory sectional view taken along the line XIB-XIB of part (a).
    Fig. 12 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 0 hours 43 minutes in the morning on May 1 (in the state in which the month advancement is started at the end of a short month).
    Fig. 13 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 2 hours 53 minutes in the morning on May 1st (in the state in which the vertices of the fingertips of the jump control of the daytime jumper and the month jumper are engaged with the top of a tooth anterior).
    Fig. 14 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 2 hours 53 minutes in the morning on May 1st (in the state in which the jump control finger portion of the jumper was completely lowered between the adjacent teeth).
    Fig. 15 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 3 hours 29 minutes in the morning on the 1st of May.
    Fig. 16 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 8 hours 44 minutes of evening on May 30th.
    Fig. 17 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 10 hours 44 minutes in the evening on the 30th of May.
    Fig. 18 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about midnight on May 30 (in the state in which the top of the part of the jumping control finger of the date jumper is engaged with the top of the tooth).
    Fig. 19 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about noon on May 31 (in the state in which the jumping control finger portion of the date jumper was completely lowered between the adjacent teeth).
    Fig. 20 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 10 hours 44 minutes of evening on May 31st.
    Fig. 21 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about midnight on May 31 (in the state in which the vertices of the jump jumper finger parts of the date jumper and the month jumper are engaged with the apex of an anterior tooth).
    Fig. 22 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about noon on June 1st (in the state in which the jumping control finger parts of the daylong jumper and month jumper were completely lowered between the adjacent anterior teeth).
    Fig. 23 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 6 am on June 1st.
    Fig. 24 is an explanatory plan view of the calendar mechanism of FIG. 1 showing it as indicating about 10 am 36 minutes in the morning on the 30th of May.
    Detailed Description of the Preferred Embodiments [0028] A preferred embodiment of the present invention will be described based on a preferred example shown in the accompanying drawings.
    Embodiment [0029] FIGS. 1 to 24 show a timepiece 2 equipped with an automatic calendar mechanism 1 which is a calendar mechanism according to an embodiment of the present invention.
    The timepiece 2 has an external appearance 3 as shown in FIG. 1. That is to say, the timepiece 2 is equipped with hands indicating the hour 11 consisting of an hour hand 11a, a minute hand 11b, and a second hand 11c, which can turn in a clockwise direction C1 around a central axis C. A dial 12 of the timepiece 2 has a set of graduations 12a indicating time positions, and a window of the month / date 13 equipped with an area 13a for the month and a zone 13b for the date. The reference 14 designates a timepiece box, and the reference 15 designates a crown mounted on a winding stem 15a.
    In the example shown in the sectional views of FIGS. 3 and 4, an hour wheel 16a at the front end of which the hour hand 11a is mounted, a minute wheel 16b at the front end of which the minute hand 11b is mounted, and a second moving wheel. 16c at the front end of which the second hand needle 11c is mounted are supported so as to be movable about the central axis C by a central tube 7b supported by a plate 6 and a central wheel bridge 7a, and are driven in rotation by a needle driving a gear train connecting one to the other a toothed portion or teeth of the hours of the hour wheel 16a, a minute gear wheel or a center wheel of the wheel of the 16b minutes, and a toothed portion or a seconds wheel of the second mobile 16c, and including another gear train connecting to a power source (not shown) such as a drum drum equipped with a timepiece spring .
    As shown in FIGS. 2 and 3, a date indicator actuating wheel 30 meshing with a toothed portion of the hours 17a of the hour wheel 16a by intermediate date wheels 38 and 39 is rotated in the direction H1 about a H axis at the speed of one rotation per day. A date pin 32 is constructed at a position (offset position) of the date toothed portion 31 as the calendar indicator actuating wheel main body portion radially away from the central axis H. A date finger 33 is inserted by insertion with a center of rotation shaft 30a of the date indicator actuating wheel 30 so as to be movable around the shaft 30a. The date finger 33 consists of a base body portion 34 and a date finger main body portion 35 projecting from the base body portion 34; when the base body portion 34 is rotated by the date pin 32, the date finger main body portion 35 is engaged with the tooth of a date indicator to effect a date advancement. A pin or crank pin 36 is integrally constructed at a position of the base body portion 34 of the off-axis date finger 33 and remote from the center of rotation shaft 30a.
    As can be seen in FIGS. 2, 3 and 4, and parts (a) and (b) of FIG. 11, a date indicator 40 has a date display wheel portion 41 shaped annular plate of large diameter, a cylindrical portion of large diameter 42a extending axially and in parallel from the inner edge of the wheel portion date display 41, a small thick-walled, thick-walled portion 42b extending radially inwardly from the lower end of the large-diameter cylindrical portion 42a, a small-walled, thick-walled cylindrical portion. diameter 42c extending axially and in parallel from the inner edge of the neck-shaped portion 42b, a calendar gear 45 formed at the inner peripheral edge on the low end side of the small-walled thick-walled cylindrical portion 42c , a month finger portion or a month forward tooth 46 formed at the upper side of the thick-walled neck portion 42b formed at the party the bottom edge of the inner peripheral edge of the large diameter cylindrical portion 42a, and a short month end advancement tooth 48 as the end-of-month tooth formed at the upper portion of the inner peripheral edge of the cylindrical portion of wide diameter 42a. Here, the month-end advancing tooth 48 and the month-advancing tooth 46 are substantially in the same position as that seen in the circumferential direction of the date indicator 40. However, if desired, the short month end advancement tooth 48 and the month advancement tooth 46 may be at different positions than that seen in the peripheral direction of the date indicator 40 or at positions remote from the other according to the peripheral direction. Unless otherwise indicated, in the parts of this description referring to FIGS. 3, 4, and 11b, the upper side refers to the side where is the hand indicating the time 11 (the side of the dial 12).
    On the dial face 41a of the date display wheel portion 41, LD characters are provided at regular intervals indicating the 31 calendar of 1 to 31. The date teeth 45 is equipped with 31 teeth 47 arranged. at regular intervals. The rotation of the date indicator 40 in the direction C2 is set by a date jumper 22 equipped with a date jump control finger portion 22a and a date jump control spring portion 22b. As can be seen in figs. 3 and 4, a positional deflection in the direction of the thickness of the date indicator 40 is set by a date indicator holding a plate 21 mounted on the plate 6 to cover the calendar toothing 45.
    The month finger portion or the month advance tooth 46 of the date indicator 40 rotates a month indicator 60 in the direction C1 around the central axis C via a wheel month indicator actuator or month transmission wheel 50 as month advancing intermediate wheel.
    As can be seen in FIG. 2, the intermediate wheel advancement month 50 consists of a toothing 51 movable about an axis J, and the teeth 52 of the toothing 51 are turned in the direction J1 by the tooth 46 when they are engaged with the forming portion month finger or month 46 advancement tooth of the date indicator 40. In this example, the month advancement tooth 46 is formed only by a tooth 46, so that the advancing intermediate wheel of month 50 be turned one tooth a month in the direction J1.
    As can be seen in explanatory sectional views such as FIGS. 3 and 4 and the explanatory plan view as in FIG. 2, a month indicator or month display wheel 60 includes a month display wheel guide tube 61 to which a cylindrical portion 16a1 of a hour wheel 16a is inserted and which is attached to the indicator of date now holding a plate 21, a star of the months or gear wheel months 64 whose hub portion 62 is engaged by movably inserting with the guide tube 61 and whose outer periphery is equipped with 12 teeth 63, a cam of month 66 in the form of a flat plate inserted into the star of the months 64 and having a cam surface 65 at its outer periphery, and a month plate or part of a month display plate 67 in the form of a thin flat plate set at the star of the month 64.
    The cam surface 65 of the month cam 66a, in a continuous and smooth state, a surface portion for a long month 65a in the form of an arcuate cam surface portion of small diameter, of a diameter more or less small, and curve so as to be smooth, which corresponds to a long month having 31 days (which is called a long month in this description), and a short month surface section 65b including a more or less protruding protrusion and curved so to be smooth, which corresponds to a short month having 30 days or less (which is called short month in this description). Therefore, it is possible for the cam follower portion to be moved clockwise C1 relative to the cam surface 65 to be moved counter clockwise C2, and return to directions C1 and C2 in a desired range.
    The star of the month 64 meshes with an intermediate wheel of advancement of month 50, which is rotated by one tooth per month, and thus makes a rotation per year in the direction C1 around the central axis C .
    LM characters indicating the months of January to December (twelve in total) are provided at regular intervals on the surface of the edge of the dial 67a of a portion of the display plate of 67 months. As can be seen on figs. 3 and 4, the month display plate portion 67 is equipped with an outer peripheral edge of a diameter slightly smaller than the inner peripheral edge of the date display wheel portion 41 of the date indicator. 40. Thus, the LM characters indicating the months on the dial surface 67a of the month display plate portion 67 are slightly closer to the center line C than the LD characters indicating the days on the 41a of the date display wheel portion 41, indicating the date in the predetermined areas 13a and 13b in the date window 13 (Figure 1).
    The rotation of the month indicator 60 in the C1 direction is set by a month jumper 24 equipped with a month jump control finger portion 24a and a spring jump control spring portion 24b. As can be seen in figs. 3 and 4, a positional deflection in the direction of the thickness of the month indicator 60 is set by a plate holding the month indicator 23 mounted on the guide tube of the month display wheel 61 to adjust moving to the side of the dial of the star of the months 64.
    The timepiece 2a, as a manual calendar correction mechanism 5, a rocking wheel 25 which can influence in the directions V1 and V2, a wheel adjusting the corrector of month 26, and a correction transmission wheel of a month 27. When a winding stem 15a is turned in one direction while it is at a first notch of the winding stem to which the winding stem 15a has been drawn by one notch by pulling the crown 15, the wheel 25 is moved in the direction V1 by the correction transmission wheel 27 to take a date correction position U1 where it is positioned to mesh with a calendar tooth 45, and the date indicator 40 is rotated in the C2 direction according to the rotation mentioned above in a direction of the winding stem 15a to perform a date correction. On the other hand, when, at the first notch of the winding stem, the winding stem 15a is rotated in the opposite direction, the rocking wheel 25 is moved in the direction V2 to take a month correction position U2, where it is positioned to mesh with a month toothing, and the month indicator 60 is rotated in the C1 direction according to the opposite rotation of the winding stem 15a to effect a month correction.
    In addition to the month cam 66, the automatic calendar mechanism 1 has an actuating lever 70 controlling the end of month progress for a short month. The actuating lever 70, as an actuating lever structure, comprises a hub 71, and first and second lever portions 74 and 77 extending integrally from the hub 71.
    More specifically, the substantially flat-plate-shaped hub 71 of the actuating lever 70 is provided with an insertion-engaging portion 72 consisting of a round hole 72a and a continuous slot-shaped opening 72b. with the round hole 72a, and the actuating lever is engaged by insertion, the peripheral surface 72c of the round hole 72a being frictionally engaged with the outer peripheral surface 36a of the column pin pin 36 of the date finger 33. In this state of insertion engagement, a slot-shaped opening 72b is slightly elastically open to provide a grip force and, in the state in which it receives no external force, the hub 71 of the lever. actuation 70 is rotated with the pin pin 36 (ie, rotated integrally) about the axis of rotation H due to the rotation of the date finger 33 caused by the rotation of the actuating wheel d date indicator 30. On the other hand, when, in the case where the hub 71 is set, the force required due to the adjustment reaches a level higher than the adherence force, sliding occurs between the peripheral surface 72c the round hole 72a of the hub 71 of the operating lever 70 and the outer peripheral surface 36a of the pin pin 36, and the hub 71 of the operating lever 70 rotates relative to the pin pin 36 of the date finger 33 Typically, the crank pin 36 and the hole 72a are both circular. In some cases, however, one of these may be of a non-circular configuration such as a polygonal configuration with round corners (usually a regular polygon).
    The first lever portion of the actuating lever 70, or first lever portion 74, is in the form of a first resilient arm 75 curved generally arcuate along a plane parallel to the extension plane of the workpiece timepiece 2, and has a proximal end portion 75a integrally connected to the hub 71, a distal end portion 75b, and a first distal end portion rising perpendicular to the distal end portion 75b by relative to the extension plane, this first distal end portion consisting of a small column-shaped portion 75d acting as a cam follower or engaging portion 75c.
    As can be seen, for example, in FIG. 3, the portion of the first resilient arm 75 other than the pin-shaped cam follower portion, i.e., the curved main body portion 75e between the proximal portion 75a and the distal end portion 75b, is shifted downward (towards the rear side of the housing) relative to the flat-plate-shaped month cam 66, in the direction of the thickness of the timepiece 2, and can pass over the rear of the month cam 66 (the overlapping position as seen from the side of the dial) in a non-hindrance state (for details, see Figs 23 and 24 mentioned below). On the other hand, as can be seen in fig. 3, the engagement portion 75c constituting the distal end portion of the small column portion 75d of the first lever portion 74 of the operating lever 70 is at the same level as the month cam 66, in the direction of the thickness of the timepiece 2, and can be attached to the outer peripheral surface of the month cam 66, ie the cam surface 65. As mentioned above, and, as can be seen, for example , in fig. 2, the cam surface 65 of the month cam 66 is presently a smooth continuous surface, so that the cam follower or the engagement portion 75c can be moved clockwise and in the direction of the cam follower counterclockwise with respect to the cam 65 while being in contact with the cam 65.
    In the relative position shown in FIG. 2 (the relative position at which the direction of rotation H1 of the date indicator actuating wheel 30 is such that the cam follower portion 75c at the distal end of the first lever portion 74 is pressed against the surface cam member 65 of the month cam 66), the hub 71 of the insertion-mounted actuating lever 70 is frictionally mounted with the crank pin 36 of the date finger 33 of the date indicator actuating wheel 30. such that, as the date indicator actuating wheel 30 is rotated in the direction H1, the cam follower or engagement portion 75c at the distal end of the first lever portion 74 of the lever actuation 70 is actually actually constantly pressed against the cam surface 65 of the month cam 66.
    The second lever portion of the operating lever 70 or second lever portion 77 is in the form of a second elastic arm 78 extending generally linearly along a plane parallel to the extension plane of the timepiece 2, from the hub 71. More specifically, the second elastic arm 78 of the second lever portion 77 has a proximal portion 78a integrally connected to the hub 71, a main body portion 78c extending generally linearly from the proximal portion 78a and slightly curved toward the curved portion 78b adjacent the distal end, and a short end advancement finger portion 78d formed by the second distal end portion, which is the distal end of the main body portion of arm 78c. The advancing finger portion 78d is formed as a forked portion 78f which, at the end, has an engagement recess 78e to be securely engaged with the end of month feed tooth 48 and press this end tooth. from month 48 in the direction C2.
    As can be seen in FIGS. 4 and 2, the second elastic arm 78 of the actuating lever 70 is located closer to the dial 12 than the first elastic arm 75 and is engageable with the end-of-month tooth 48 of the date indicator 40. furthermore, the second elastic arm 78 has a curved portion 78b in the vicinity of the distal end and can be bent so that, as described in detail below with reference to FIGS. 7 and 8, it can be bent by the end of month tooth 48 when this end-of-month tooth 48 is pressed against an outer side edge 78g of the distal end portion, from behind, in the C2 direction, and allows this one to be crossed by the tooth of end of month 48 in direction C2.
    The angle made by the first and second lever parts 74 and 77 is formed as follows: - when, in a month long, the cam follower portion 75c at the distal end of the first lever portion 74 is in contact with the month cam 66, the advancing finger portion 78d of the second lever portion 77 is located on the radially inner side of the distal end of the month end tooth 48 not being able to act on the end of month tooth 48; when, in a short month, the cam follower portion 75c at the distal end of the first lever portion 74 is in contact with the month cam 66, the feed finger portion 78d of the second lever portion 77 comes into contact with the end of month tooth 48 so that an additional date advance can be made at the end of the month.
    Then, the operation of the automatic calendar mechanism 1 of the timepiece 2 according to the embodiment of the present invention described above will be described successively with reference to FIGS. 2 and 5 to 24 in addition to FIGS. 1,3, and 4.
    FIG. 2 shows the timepiece indicating approximately 3 hours 30 minutes of the afternoon, April 29, that is to say during the day of a day other than the end of a month's short month ( that is, before the date change operation begins). In this state, the cam follower portion or engagement portion 75c of the first lever portion 74 of the operating lever 70 is facing a region 65b2 which is in the vicinity of the vertex 65b1 of the surface portion for short month 65b of the month cam 66 but spaced from the top 65b1, and it is pressed against the region 65b2 under the action of the pressing force of the date pin 32 due to the rotation in the H1 direction of the wheel The cam follower portion or engagement portion 75c is in contact with the region 65b2 spaced from the vertex 65b1 so that the advancing finger portion 78d of the distal end of the second lever portion 77 of the actuating lever 70 is located at a position spaced from the end of month tooth or month forward tooth 48 of the date indicator 40, that is to say on the side internally radially from the distal end The hour of about 3 hours 30 minutes is during the day, so that the jump control finger portion 22a of the date jumper 22 sets the date teeth to position 45 being between adjacent teeth 47 of the date teeth 45. Moreover, although the date of April 29 is close to the end of the month, the timepiece is in the state that is his before the last day of the month is reached, so that the month advancement tooth 46 of the date indicator 40 is at a distance from the tooth 52 of the intermediate advancing wheel of month 50, and the finger portion of skip control 24a of the date jumper 24 sets the star of the months 64 in position by being between adjacent teeth 63 of the star of the months 64. Therefore, "APR" indicating April is displayed in the display area of month 13a of the date window 13, as characters of a display month LM, and the number "29" is displayed in the date display area 13b, as date display characters LD indicating the 29th day.
    After this state, following the rotation of the date indicator actuating wheel 30 with the passage of time, the date finger main body portion 35 is engaged with the nearest tooth 47a. of the date indicator actuating wheel 30, so as to turn the date indicator 40 in the direction C2, thereby effecting a date advance. Therefore, the date display characters LD in the date indicating area 13b of the date window 13 are changed from "29" to "30." FIG. 5 shows the timepiece indicating about 9 pm on April 30 after the date change.
    As in the case of FIG. 2, which represents the state at about 3 hours 30 minutes of the afternoon on April 29, in the state of fig. 5, which represents the state at about 9 pm on April 30, the cam follower portion 75c of the first lever portion 74 of the operating lever 70 is contiguous with the region 65b2 in the vicinity of the vertex 65b1 of the section surface area for 65b short month of the 66 month cam; the advancement finger portion 78d at the distal end of the second lever portion 77 is located away from the distal end of the month forward tooth 48 of the date indicator 40; the main body portion 35 of the date finger 33 is spaced from the nearest tooth 47a of the toothing 45; the month 46 advancement tooth of the date indicator 40 is located far from the tooth 52 of the intermediate advancing wheel of month 50; and the jump control finger portion 22a of the date jumper 22 sets the date teeth 45 in position between adjacent teeth 47 of the date toothing 45 with the jump control finger portion 24a of the jumper. month 24 setting the star of the months 64 being between adjacent teeth 63 of the star of the months 64.
    As shown in FIG. 6, at about 10 hours 44 minutes in the evening on April 30, which is an hour near the end of a short month, the main body portion 35 of the date finger 33 adjoins the nearest tooth 47a of the teeth of date 45 to start a date advancement. In this state, the cam follower portion 75c of the first lever portion 74 of the actuating lever 70 approaches the top 65b1 of the cam surface portion for the short month 65b of the month cam 66, but is still in the region 65b2 spaced from it, the advancement finger portion 78d at the distal end of the second lever portion 77 being located away from the distal end of the month advancement tooth 48 of the date indicator 40.
    As shown in FIG. 7, after a passage of time is reached the time of about midnight April 30, which is the end of the month month end day runs the main body part 35 of the date finger 33 adjoins the tooth the nearest 47a of the date teeth 45 to perform a date advancement, and the state reached is that in which the top 22c of the jump control finger portion 22a of the date jumper 22 is engaged with the top 47b of the tooth 47 of the calendar toothing 45. In this state, are displayed as date display characters LD, intermediate parts between "30" indicating the 30th day and "31" indicating the 31th day. Further, the cam follower portion 75c of the first lever portion 74 of the actuating lever 70 actually cooperates with the top 65b1 of the short month surface portion 65b of the month cam 66, and the finger portion 65b of end of month advance 48 of the date indicator 40 approaches or adjoins the edge of the outer side 78g of the advancement finger portion 78d at the distal end of the second lever portion 77 of the actuating lever 70 so as to begin to push back the advancing finger portion 78d of the second lever portion 77.
    As shown in FIG. 8, when, immediately after the state of FIG. 7, substantially at the same time, ie at about midnight on April 30, the top 22c of the jump control finger portion 22a of the date jumper 22 crosses the top 47b of a tooth 47, the control finger portion. 22a suddenly drops this tooth 47 under the action of the spring force of the spring portion 22b of the date jumper 22, and, at the same time, pushes the tooth 47 in the direction C2. At the same time, the date indicator 40 is abruptly advanced in the C2 direction to continue advancing the date, and the month-end advancement tooth 48 pushes the edge of the outer side 78g of the finger portion advancement 78d at the distal end of the second lever portion 77 to resiliently deflect the main body portion 78c of the second elastic arm 78 of the second lever portion 77 in the direction E1 from the undeflected state S1 indicated by the phantom line to the deflected state S2 indicated by the solid line, pushing the advancing finger portion 78d and leaving the advancing finger portion 78d back to advance in the C2 direction beyond the portion forming advancement finger 78d.
    In addition, as shown in FIG. 9, immediately after the state of FIG. 8, substantially at the same time, ie around midnight on April 30, in other words around noon on May 1st, the jump control finger portion 22a of the date jumper 22 drops completely between the next adjacent teeth 47 to set the date indicator back to position. At the same time, the final date advancement from "30" to "31" is made, and the display characters LD in the date display area 13b are changed to "31". This date advancement is performed by the date finger advancement 33 under the action of the date jumper 22 with the same timing as the normal date advancement. Further, the end of month feed tooth 48 is completely separated from the feed finger portion 78d of the second lever portion 77 of the operating lever 70, and the feed tooth of 46 months approach of the tooth 52 of the month 50 intermediate feed wheel.
    As shown in FIG. 10, in the enlarged view of FIG. 11 (a) and the explanatory sectional view of FIG. 11 (b), after which some time has elapsed to reach about 12 hours 32 minutes in the afternoon on May 1, the advancing finger portion 78d of the second lever portion 77 abuts the end of month tooth 48 due to the rotation of the pin pin 36 caused by the rotation of the date finger 33 following the rotation of the date indicator actuating wheel 30, and the positioning of the lever actuating the cam follower 70 in the state in which the cam follower portion 75c of the first lever portion 74 is held in contact with the top 65b1 of the short month surface portion 65b of the month cam 65 Therefore, after that, an additional date advancement at the end of a short month begins. At this time, the month advancement tooth 46 of the date indicator 40 is also close to the tooth 52 of the intermediate advancing wheel of month 50.
    In addition, as shown in FIG. 12, when a certain time has elapsed so that it is approximately 12 hours 43 minutes in the afternoon on May 1, the advancing finger portion 78d of the second actuating lever portion 77 of the lever actuator 70, whose cam follower portion 75c is in contact with the top 65b1 of the short month surface portion 65b, begins advancing the end of month tooth 48 following rotation of the crank pin 36 into because of the rotation of the date finger 33 caused by the rotation of the date indicator actuating wheel 30, and the month advancement tooth 46 adjoins a tooth 52 of the intermediate advancing wheel of 50 months in because of the resultant rotation in the C2 direction of the date indicator 40; and after that, the rotation of the month 64 star of the intermediate month advancing wheel 50 by the month advancement tooth 46, i.e., a month advancement, is started. The moment when the advancing finger portion 78d of the actuating lever portion 77 begins to advance the end of month tooth 48 and the moment when the advancement of the intermediate feed wheel is started. 50 months by 46 month advancement tooth are somewhat staggered from each other; the interval may be shorter or longer as long as the offset is not excessive.
    As shown in FIG. 13, when, after that, some time has elapsed for it to be about 2 hours 43 minutes in the morning on May 1, the advancing finger portion 78d of the second actuating lever portion 77 of the lever actuator 70 pushes the end-of-month tooth 48 to perform the date advancement, and the reached state is that in which the top 22c of the jump control finger portion 22a of the date jumper 22 is engaged with the top 47b of the tooth 47 of the calendar toothing 45. In this state, the intermediate parts between "31" indicating the 31st day and "1" indicating the next day, ie the first day, are displayed, as date display characters LD, in the date display area 13b of the date window 13. In addition, as the date indicator 40 rotates, the month advancement tooth 46 is engaged with a tooth 52. of the intermediate wheel of advancement of month 50 to make turn the star of the month 64 by means of this intermediate advancing wheel of month 50, and the reached state is that in which the top 24c of the jumping control finger portion 24a of the jumper of month 24 is in engagement with the vertex 63a of the tooth 63 of the star of the months 64. Therefore, in the month display area 13a of the date window 13, are displayed, as month display characters LM, intermediate parties between "APR" indicating April and "MAY" indicating the following month, ie May. When the advancing finger portion 78d of the second lever portion 77 of the actuating lever 70 is engaged with the end-of-month tooth 48, the advancing finger portion 78d of the second lever portion 77 remains in engagement with the end-of-month tooth 48 as long as the date indicator operating wheel 30 and the date indicator 40 are in angular positions in the direction H1 and the direction C2 allowing the state consisting of to be engaged, so that, as shown in fig. 13, the follower portion 74c of the first lever portion 74 of the actuating lever 70 is placed in the state in which it is spaced from the cam surface 65 of the month cam 66.
    As shown in FIG. 14, when, immediately after the state of FIG. 13, substantially at the same time, ie at about 2 hours 53 minutes in the morning on May 1, the top 22c of the jump control finger portion 22a of the date jumper 22 crosses the top 47b of the tooth 47, the portion 22a jumping control finger drops abruptly from the tooth 47 under the action of the spring force of the spring portion 22b of the date jumper 22, and, at the same time, pushes the tooth 47 in the direction C2 . At the same time, the date indicator 40 is advanced sharply in the C2 direction to continue the date advancement, and the jump control finger portion 22a of the date jumper 22 drops completely between adjacent adjacent teeth 47. whereby the date toothing 45 is again set in position. Similarly, when the apex 24c of the jump control finger portion 24a of the month jumper 24 passes the vertex 63a of the tooth 63, the jump control finger portion 24a abruptly drops from the tooth 63 beneath it. action of the spring force of the spring 24b spring portion 24b, and pushing the tooth 63 in the C1 direction to advance the month indicator 60 sharply in the C1 direction to continue the month advancement; and the jump control tooth 24a of the month jumper 24 is fully lowered between adjacent adjacent teeth 63, whereby the month star 64 is again set in position. Therefore, the date advancement from "31" to "1" is completed, and the display type LD in the date display area 13b is changed to "1" and, at the same time, the progress of months from "APR" to "MAY" is completed, the display characters LM in the display area of month 13a being changed to "MAY". At the same time, the end-of-month tooth 48 of the date indicator 40 is separated from the advancing finger portion 78d of the second actuating lever portion 77, and the tooth 52 of the intermediate gear of advancement of month 50 is separated from the month advancement finger 46 of the date indicator 40. The cam follower portion 75c of the first lever portion 74 of the actuating lever 70 remains spaced from the cam surface 65 of the month cam 66.
    As shown in FIG. 15, when more time elapses so that it is about 3 hours 29 minutes in the morning on May 1, the reached state is that in which the cam follower portion 75c of the first lever portion 74 of the lever actuation 70 is again attached to the cam surface 65 of the month cam 66 due to the rotation of the date finger 33 following the rotation in the direction H1 of the date indicator actuating wheel 30, and the advancing finger portion 78d of the second actuating lever 77 moves radially inward to radially move away from the end of month tooth 48.
    After that, the normal date advance is repeated; for example, at about 8:44 pm on May 30, the state shown in FIG. 16 is reached. In this state, the date jumper 22 and the month jumper 24 set the calendar gear 45 and the star of the months 64 in position, and "MAY" and "30" are displayed in the zones 13a and 13b of the window of FIG. The cam follower portion 75c of the first lever portion 74 of the actuating lever 70 is joined to the long month cam surface 65a, a region of the cam surface 65 of the month cam 66, and the advancing finger portion 78d of the second actuating lever 77 is radially spaced from the end tooth of month 48. The main body portion 35 of the date finger 33 of the indicator wheel date 30 is located at a position of approximately two hours before the position where it is engaged with the nearest tooth 47a of the date indicator 40.
    As shown in FIG. 17, when approximately two hours elapse thereafter for 10 hours 44 minutes in the evening on May 30, the main body portion 35 of the date finger 33 of the date indicator actuating wheel 30 is in engagement with the nearest tooth 47a of the date indicator 40, and the date advance of the date indicator 40 in the direction C2 is started.
    As shown in FIG. 18, when more time has elapsed to be around midnight on May 30, the state reached is the one in which the date change is made (the state immediately before the end of the change), the top 22c the jump control finger portion 22a of the date jumper 22 being just in contact with the apex 47b of a tooth 47 of the calendar tooth 45; and intermediate portions between "30" and "31" are displayed in the area 13b of the date window 13.
    As shown in FIG. 19, when, immediately after that and at the same time, that is to say around zero o'clock on May 31, the jumping control finger portion 24a of the date jumper 22 is lowered between adjacent teeth 47 of the date toothing 45, the date advancement is completed, and the date jumper 22 again sets the date teeth 45 in position, with "MAY" and "31" displayed in the areas 13a and 13b of the window of date 13.
    After that, the toothed portion 31 of the date indicator actuating wheel 30 is rotated in the direction H1 following the rotation of the intermediate date wheels 38 and 39 as a result of the rotation of the toothed portion of the 17a hours with the passage of time; at about 10 hours 44 minutes on May 31, the main body portion 35 of the date finger 33 engages the nearest tooth 47a of the date indicator 40; and, after that, the date advancement is started. This state is substantially the same as the state of FIG. 6 representing the timepiece indicating about 10 hours 44 minutes of evening on April 30, with the difference that it is not the end of a short month but the end of a long month is represented. Fig. 20 represents the timepiece indicating the end of a long month (which, in this example, is May) (ie the end of the 31st day), so that the date indicator 40 is ahead of a day compared in the state of FIG. 6; the month 46 advancement tooth of the date indicator 40 is engaged with the tooth 52 of the intermediate advancing wheel of month 50, and after that, a month advancement is also started. In addition, the state of FIG. 20 is that of a long month, so that the cam follower portion 75c of the first lever portion 74 of the operating lever 70 is in contact with the long month surface portion 65a of the month cam 66; therefore, the finger portion 78d of the second lever portion 77 of the operating lever 70 is spaced from the month-end tooth 48 of the date indicator 40.
    As shown in FIG. 21, when more time elapses for it to be around midnight on May 31, the date advancement by the main body portion 35 of the date finger 33 and the month advancement by the finger portion of month 46 progress of the 40-day indicator occur; and an attained state is one in which the apex 22c of the jump control finger portion 22a of the date jumper 22 engages the vertex 47b of the tooth 47 of the toothing 45 of the date indicator 40, and wherein the apex 24c of the jump control finger portion 24a of the month jumper 24 engages the vertex 63a of the tooth 63 of the star 64 of the month indicator 60, i.e. a state in which the change of date and the change of month occurred; in the date display area 13a of the date window 13, an intermediate portion between "MAY" and "JUN" is displayed and, in the date display area 13, an intermediate portion between "31" and "1" Is displayed. As mentioned above, the actuating lever 70 is not actuated to perform a date advancement at the end of a long month.
    As shown in FIG. 22, when, immediately after that, it is actually reached the same time, in other words, at approximately zero o'clock on June 1, the top 22c of the jump control finger portion 22a of the date jumper 22 passes the top 47b of the tooth 47 of the calendar tooth 45, and the jump control finger portion 22a is lowered between the adjacent teeth 47 to re-adjust the date toothing 45 in position; and the top 24c of the jump control finger portion 24a of the month jumper 24 passes the top 63a of the tooth 63 of the star of the months 64, and the jump control finger portion 24a is lowered between the Adjacent teeth 63 to reset the star of the months 64 in position, the change of date and the change of month being completed. In other words, "JUN" and "1" are displayed in the areas 13a and 13b of the date window 13.
    As shown in FIG. 23, when, some time elapsed after that for it to be, for example, about 6 am on June 1, a date indicator toothed portion 31 is turned in the H1 direction by the wheels of intermediate date 38 and 39 due to the rotation in the direction C1 of the toothed part of the hours 17a, and, in response to this rotation, the date finger 33 pressed by the date pin 32 is also rotated in the direction H1 ; and, at the same time, the operating lever 70, whose cam follower portion 75c at the distal end of the first lever portion 74 is in contact with the short month surface portion 65b of the cam surface 65 of the month cam 66 is made to rotate relative to the center of rotation or pin pin 36 engaged by insertion into the insertion engagement portion 72 of the hub 71, in a frictionally engaged state. . In the state of FIG. 23, the crank pin 36 is located on the 3 o'clock side of the bracelet (the right side as shown in Fig. 23) about the axis of rotation H of the date indicator actuating wheel 30, so that, as the date indicator actuating wheel 40 rotates, the cam follower portion 75c of the operating lever 70 moves in the directions D1 and D2 along the short month surface section 65b. At this time, the curved arm main body portion 75e of the first resilient arm 75 of the first lever portion 74 of the actuating lever 70 is located behind the month cam 66 as seen in FIG. 23 and partially overlaps the month cam 66. As mentioned above with respect to FIG. 3, the curved main body portion 75e is spaced apart from the month cam 66 and is located on the bottom side thereof (located on the lower side in Fig. 3), so that there is no risk that the 75th curved main body portion interferes with the month cam 66. In the state shown in FIG. 23, the date indicator 40 and the month indicator 60 are in the same positions as in FIG. 22 and remain motionless.
    As shown in FIG. 24, when more time has elapsed for it to be, for example, about 10 hours 36 minutes in the morning on June 1, the date indicator toothed gear 31 is turned in the H1 direction by the wheels of intermediate date 38 and 39 due to rotation in the C1 direction of the toothed portion of the hours 17a, and in response to this rotation, the date finger 33 pressed by the date pin 32 is also rotated in the direction H1; and, at the same time, the operating lever 70, whose cam follower portion 75c at the distal end of the first lever portion 74 is in contact with the short month surface portion 65b of the cam surface 65 of the month cam 66 is made to rotate relative to the center of rotation or pin pin 36 engaged by insertion into the insertion engagement portion 72 of the hub 71 in a frictionally engaged state. In the state of FIG. 24, the pin pin 36 is located beyond the imaginary line connecting the axis of rotation H of the date indicator actuating wheel 30 and the cam follower portion 75c, so that, like the wheel When the date indicator actuator 40 rotates, the cam follower portion 75c of the operation lever 70 moves in the direction D2 in the direction of the vertex along the short month surface section 65b. In this case, the curved arm main body portion 75e of the first resilient arm 75 of the first lever portion 74 of the operating lever 70 is located behind the month cam 66 over an even wider extent than in the case of fig. 23 and partially overlaps the month cam 66. As mentioned above, the curved arm main body portion 75e is spaced from the month cam 66 and is located on the box bottom side thereof, so that there is no risk that the 75th curved main body portion interferes with the month cam 66 and thereby causes the movement of the curved arm main body portion 75e to be impeded by the month cam 66 In the state shown in FIG. 24 also, the date indicator 40 and the month indicator 60 are in the same positions as in FIG. 23 and remain motionless.
    After that, a normal date advance is made, and when the end of a month approaches, for example, at about 3 hours 30 minutes on June 29, a state that is actually the same as that of FIG. 2 is reached since in both cases the time is near the end of a short month, the difference being only one in June and the other in April; and, with the passage of time, a similar date advancement and month advancement are made.
    As described above, in the calendar mechanism 1 according to an embodiment of the present invention, the hub 71 of the actuating lever structure 70 is frictionally mounted with a crank pin 36 offset from the center of rotation of the date indicator actuating wheel 30, so that the actuating lever structure 70 rotates with the date indicator actuating wheel 40. In addition, in the calendar mechanism 1, the actuating lever structure 70 has a first distal end portion constituting a cam follower 75c engaged with the month cam 66, so that the cam follower 75c is pressed against the cam surface 65 of the month cam 66 when the actuating lever structure 70 rotates with the date indicator actuating wheel 30. In addition, in the calendar mechanism 1, the hub 71 of the actuating lever structure 70 is mounted with friction with the crank pin 36 of the date indicator actuating wheel 40, so that when the cam follower 75c is pressed against the month cam 66, the actuating lever structure 70 rotates relative to the In addition, in the calendar mechanism 1, the actuating lever structure 70 has a second distal end portion 78d to act on the month end tooth 48 of the date indicator 40 to effect advancement. of an additional date of one day relative to the date indicator 40 at the end of a short month, so that, at the end of a short month, the hub 71 of the actuating lever structure 70 of which the hub 71 is frictionally mounted with the crank pin 36 and the first distal end portion constituting a cam follower 75c is pressed against the month cam 66, rotates relative to the crank pin 36 under the control of the cam from month 66, and in doing so, the second distal end portion thereof constituting a short month end advancement finger 78d engages the month end tooth 48 of the date indicator 40 to effect a date advancement. addition of a tooth with respect to the date indicator 40. In other words, in the calendar mechanism 1, at the end of a long month, the month cam 66 sets in position or moves the structure of actuating lever 70 by the cam follower 75c of the actuating lever structure 70 to relieve the end-of-month advancing finger 49 so that the second distal end portion end of the short month 78d of the actuating lever structure 70 can not come into engagement with the end of month tooth 48 of the date indicator 40. Therefore, in the calendar mechanism 1, it is only necessary to provide the wheel of action date indicator 30 with the actuating lever structure 70 and making an additional date advance of one day relative to the date indicator 40 at the end of a short month, so that it is possible to avoid an excessively complicated structure; furthermore, it is only necessary that the frictional resistance between the actuating lever structure 70 and the crankpin 36 is sufficiently high to cause the actuating lever structure 70 to rotate with the date indicator actuating wheel. 30, so that it is possible to prevent the frictional resistance from being excessive.
    As described above, in the calendar mechanism 1, the date indicator actuating wheel 30 comprises a date toothed portion 31 in the form of a date indicator actuating wheel main body such as a disc adapted to rotate every 24 hours, a date pin 32 provided at a position offset from the main body of the date indicator tooth portion 31, and a date finger 33 provided coaxially with the body principal of the date indicator gear portion 31 to be able to rotate relative to the main body of the date indicator gear toothed portion 31 and adapted to be rotated by the date pin 32, with the finger of date 33 being equipped with the crankpin 36 frictionally mounted with the hub 71 of the actuating lever structure 70, so that the date finger 33 is actually formed as a rigid element, and the hub 71 of the actuating lever structure 70 is frictionally mounted on the crank pin 36 of the date finger 33.
    In addition, in the calendar mechanism 1, the actuating lever structure 70 has integrally a first lever portion 74 connecting the hub 71 and the first distal end portion 75c, and a second lever portion 77 connecting the hub 71 and the second distal end portion 78d; the second lever portion 77 is capable of elastic deformation, and the end-of-month tooth 48 causes the second lever portion 77 to undergo elastic deformation with the actuation of the date indicator 40 by the jumper at the end of a short month, thus leaving the distal end portion 78d of the second lever portion 77, so that, at the moment of actuation of the date indicator 40 by the jumper at the end of a short month, that is, at the end of the jump control of the date jumper 22 at the end of a normal date advancement at the end of a short month, the end of month tooth 48 brings the second part lever 77 to be resiliently deformed to allow it to be located to disengage the distal end portion 78d of the second lever portion 77, and the end of month tooth 48 to the disengaged position is still engaged with the distal end part (the second party e) 78d of the second lever portion 77 several hours later, thereby making it possible to perform additional date advancement by means of the second distal end portion 78d.
    In addition, in the calendar mechanism 1, the first distal end portion consists of a cam follower portion such as a pin 75c constructed at the distal end of a first lever portion 74; the follower part of
    权利要求:
    Claims (8)
    [1]
    cam such as a pin 75c is attached to the cam surface 65 of the month cam 66; and the month cam 66 consists of a plate-shaped member, the portion of the first lever portion 74 other than the cam follower portion such as a pin 75c being capable of passing the plate-shaped month cam 66 in a state of non-hindrance, so that the center of rotation of the date indicator actuating wheel 30 can come to a position near the outer peripheral surface of the month cam 66, making it possible to decrease the Congestion in the plan view. In addition, in the calendar mechanism 1, the month end tooth 48 of the date indicator 40 and the month advancement tooth 46 meshing with an intermediate month advancing wheel 50 turning a concentric star of the month 64 with the cam of month 66 to turn the intermediate wheel advancement of month 50, are provided at different positions in the direction of the thickness of the date indicator 40 and at the same position or at positions close to each other in the peripheral direction C1, C2 of the date indicator 40, so that it is possible to reduce the size. In this case, the end of month tooth and the month advance tooth are typically provided. In addition, in the calendar mechanism 1, the entire cam surface 65 of the month cam 66 is continuous and is slightly curved, so that the degree of freedom in terms of movement of the part constituting the follower of cam 75c can be maximized, and it is possible to reduce the size in the plan view of the mechanism to a minimum degree. claims
    A calendar mechanism (1) comprising: a month cam (66) having a cam surface (65) distinguishing between a long month having 31 days and a short month having 30 days or less and adapted to take a turn per year; a date indicator (40) comprising a calendar tooth (45) and an end of month tooth (48); a date indicator actuating wheel (30) comprising a date finger (33) adapted to rotate every 24 hours and act on the date teeth (45) of the date indicator (40) for rotate this date indicator (40); and an actuating lever structure (70) having a hub (71) mounted on a crankpin (36) with friction to overcome in order to rotate the hub (71) about the crankpin (36) off-center to rotation of the date indicator actuating wheel (30) and having a first distal end portion constituting a cam follower (75c) arranged to cooperate with the month cam (66) and a second portion of distal end constituting a short month end advancement finger (78d) intended to act on the end of month tooth (48) of the date indicator (40) to perform an additional one-day advance of the date indicator (40) at the end of a short month.
    [2]
    2. calendar mechanism (1) according to claim 1, wherein the date indicator actuating wheel (30) comprises a disk-shaped calendar indicator actuating wheel main body (31) adapted for rotating every 24 hours, a date pin (32) mounted at an off-axis position on the date indicator actuating wheel main body (31), and a date finger (33) provided coaxially by in relation to the date indicator actuating wheel main body (31) to be able to rotate relative to the date indicator actuating wheel main body (31) and adapted to be rotated by the date pin (32), the date finger (33) being equipped with the crank pin (36) frictionally engaged in the hub (71) of the actuating lever structure (70).
    [3]
    The calendar mechanism (1) according to claim 1, wherein the actuating lever structure (70) integrally comprises a first lever portion (74) connecting the hub (71) and the first distal end portion, and a second lever portion (77) connecting the hub (71) and the second distal end portion.
    [4]
    4. Calendar mechanism (1) according to claim 3, wherein the second lever portion (77) is capable of elastic deformation.
    [5]
    The calendar mechanism (1) according to claim 3, wherein the first distal end portion consists of a pin cam follower portion (75c) at the distal end of the first lever portion (74). , while the pin cam follower portion (75c) is mated to the cam surface (65) of the month cam (66) and the month cam (66) consists of a plate-shaped member , the portion of the first lever portion (74) other than the pin-shaped cam follower portion (75c) and the month cam (66) being able to come one above the other without will interfere.
    [6]
    6. calendar mechanism (1) according to one of claims 1 to 5, wherein, the date indicator (40) having a peripheral direction (C1, C2), the end of month tooth (48) of the date indicator (40) and one month advancement tooth (46) operable on an intermediate month advancing wheel (50) for rotating said intermediate month advancing wheel (50) provided to rotate a month star (64) concentric with the month cam (66), are provided at the same position or at positions close to each other in the peripheral direction (C1, C2) of the date indicator (40).
    [7]
    7. Calendar mechanism (1) according to one of claims 1 to 5, wherein the entire cam surface (65) of the cam of months (66) is continuously formed entirely of curves.
    [8]
    8. Timepiece (2) comprising a calendar mechanism (1) according to one of claims 1 to 5.
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    同族专利:
    公开号 | 公开日
    JP2013117397A|2013-06-13|
    JP5822695B2|2015-11-24|
    US20130170325A1|2013-07-04|
    CH705832A2|2013-06-14|
    CN103135427B|2016-12-21|
    CN103135427A|2013-06-05|
    US8848489B2|2014-09-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US203640A|1876-10-12|1878-05-14|Improvement in calendar-watches |
    JPS515594B1|1970-06-22|1976-02-20|
    CH494772A4|1972-04-05|1975-09-15|
    JP2651150B2|1987-06-16|1997-09-10|シチズン時計株式会社|Clock calendar mechanism|
    US6108278A|1998-09-11|2000-08-22|Frederic Piguet S.A.|Annual calendar mechanism for clockwork movement|
    EP1507179A1|2003-08-12|2005-02-16|Frédéric Crettex|Date corrector|
    DE602005001798T8|2004-05-14|2008-08-28|Rolex Sa|Annual calendar mechanism for clockwork|
    AT528699T|2005-11-11|2011-10-15|Omega Sa|ANNUAL CALENDAR MECHANISM FOR MOVEMENT|
    JP5135514B2|2007-11-21|2013-02-06|セイコーインスツル株式会社|Clock with calendar mechanism having a month wheel and a date wheel|
    JP5181133B2|2008-11-28|2013-04-10|セイコーインスツル株式会社|A clock with a calendar mechanism equipped with a month wheel and a date wheel|
    JP5311559B2|2009-01-23|2013-10-09|セイコーインスツル株式会社|Clock with calendar mechanism with two date wheels|JP6344739B2|2014-09-11|2018-06-20|セイコーインスツル株式会社|Auto-calendar mechanism, movement and watch|
    EP3029531B1|2014-12-02|2018-08-01|Blancpain SA.|Device for displaying periods forming an annual cycle|
    JP6649809B2|2016-03-08|2020-02-19|セイコーインスツル株式会社|Date wheel, calendar mechanism, movement and clock|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011263935A|JP5822695B2|2011-12-01|2011-12-01|Calendar mechanism and watch having the same|
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