• 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 present invention relates to a display mechanism for a timepiece comprising a scale (2), an indicator (1) concentrically pivoted to said scale (2) and with which it cooperates, a display unit (6, 7) arranged to rotate said indicator (1), a driving carriage (4, 5) for driving the rotating display (6, 7) and elastic means (8, 9) for positioning angular mobile display (6, 7). Said graduation (2) comprises markings distributed over a circumference, at least two consecutive first marks being separated by a first angular distance greater than a second angular distance separating two consecutive second marks. The mobile display (6, 7) comprises a cam (7) integral with said indicator (1) and having at least a first portion (71) without tooth and at least a second toothed portion (72). Said elastic means (8, 9) are constrained in abutment against the cam (7) and arranged to determine the angular positions of the cam (7), and therefore of the indicator (1), when they cooperate with said at least one a second toothed portion (72). The cam (7) and the elastic means (8, 9) are arranged so that the cam (7) pivots by an angle equal to the first angular distance when said elastic means (7, 8) cooperate with the first portion ( 71) of the cam (7).
    公开号:CH713209A2
    申请号:CH01619/16
    申请日:2016-12-08
    公开日:2018-06-15
    发明作者:Vandel Philippe；Barraud Mathieu
    申请人:Richemont Int Sa；
    IPC主号:
    专利说明:

    Description: [0001] The subject of the present invention is a display mechanism for a timepiece comprising an indicator concentrically rotated to a scale with which it cooperates.
    Such a display mechanism may in particular be used to display the time or date. In general, the markings of the graduation are distributed uniformly over a circumference. In the case of a time display or a display of the central date, that is to say when the indicator is pivoted to the center of the movement of the timepiece, said indicator sweeps the entire dial of the timepiece and may mask at some point a complication (whirlwind ...) or another display (moon phase ...) that would be placed in a sector of the dial.
    Patent CH 699 736 describes such a central calendar mechanism in which the graduation markers are not distributed uniformly over a circumference but are arranged so that the angular distance separating the marks 15 and 16 is greater the angular distance separating the other marks from 1 to 31. Thus, between the marks 15 and 16 is created a sector of the dial of the timepiece without a marker in which the date hand does not stop. In such a sector can be housed a whirlpool or a moon phase without risk of being hindered by the date hand. The mechanism described in this patent is based on the use of several toothed sectors and their cooperation.
    Patent DE 10 200 284 describes a central display mechanism minutes in which a needle cooperates with a graduation having 60 marks, the angular distance between the marks 60 and 1 being greater than the angular distance separating the other marks from 1 to 60. Thus, every hour, the minute hand must take a step greater to pass from 60 to 1 mark and start the next hour, which marks the passage of the full hour. In this mechanism, the minute hand is secured to a star. This star is subjected to the action of a positioning jumper carried by the minute wheel, and which thus secures the star to said minute wheel. A cam is integral with the star and a lever abuts against the periphery of the cam constrained by a spring. Once per hour, the lever cooperates with the cam to rotate it and to rotate the star with a pitch corresponding to the angular distance that the minute hand must cross the mark 60 and the mark 1. This mechanism requires the adjustment of two springs (the jumper for the star and the lever spring) and a special gear so that the minute wheel does not make one turn per hour but travels 330 ° in one hour (the distance angular between marks 1 and 60 in the clockwise direction). In addition, the minute wheel, the star and the cam are all pivoted about the same axis with the minute hand, which generates a large thickness congestion.
    The present invention aims to provide a display mechanism for a timepiece that can be central while avoiding the disadvantage above, an alternative construction to CH 699 736 and simpler than DE 10 200 284 but without being limited to a display of the date or minutes.
    The present invention relates to a display mechanism for a timepiece comprising a graduation, an indicator pivoted concentrically to said scale and with which it cooperates, a display mobile arranged to rotate said indicator, a mobile carrier for driving the rotational display mobile and elastic means for ensuring the angular positions of the display mobile, said graduation comprising marks distributed over a circumference, at least two first consecutive marks being separated by a first distance angular greater than a second angular distance separating two consecutive second marks, characterized in that the display mobile comprises a cam integral with said indicator and having at least a first toothless portion and at least a second toothed portion; in that said resilient means are biased against the cam and arranged to determine the angular positions of the cam, and therefore of the indicator, when they cooperate with said at least one second toothed portion; and in that the cam and the resilient means are arranged so that the cam pivots by an angle equal to the first angular distance when said resilient means co-operate with the first portion of the cam.
    The present invention also relates to a timepiece according to claim 11.
    The accompanying drawings schematically illustrate an embodiment of the display mechanism according to the invention.
    Fig. 1 illustrates a date display mechanism according to an embodiment of the invention seen side ca dran and in the position it occupies the 15th of the month around 18 hours.
    Fig. 2 is a perspective view of the mechanism of FIG. 1 in the position he occupies on the 31st of the month.
    Fig. 3 illustrates the display mechanism of the date in the position it occupies the 31st of the month a little before midnight.
    Fig. 4 is a view of the date display mechanism in the position it occupies on the 31st of the month to midnight and illustrating the beginning of the transition from the 31st of a month to the 1st of the following month.
    Figs. 5 and 6 illustrate the display mechanism of the date during the passage of the 31 of a month to the 1st of the following month.
    Fig. 7 is a view of the date display mechanism in the position it occupies on the 1st of the month immediately after midnight.
    In the embodiment described with reference to the figures, the display mechanism according to the invention is a date display mechanism comprising a date indicator pointer 1 co-operating with a scale 2. The graduation 2 is concentric to the pivot axis A of the needle 1 and has 31 marks for indicating the calendar of the month. The said markers of the graduation 2 are not all uniformly distributed over a circumference of 360 °. In the illustrated embodiment, the angular arc between the mark 31 and the mark 1 is larger than that between two other successive marks. Thus, the graduation 2 has a sector 3 which does not include markers. The mechanism is arranged so that the needle 1 passes directly from 31 to 1 at the end of the month without stopping in the sector 3. Thus, a decoration, another complication such as a whirlpool or another display as a moon phase placed in said sector 3 will be clearly visible without the needle 1 does not come at any time disturb the vision of this element.
    The mechanism according to the invention is arranged to advance the needle 1 step by step, at least one of these steps being larger than the others. In the illustrated embodiment, the needle 1 performs 31 steps, including 30 steps of a first angular amplitude and a pitch of a second angular amplitude greater between the 31 and 1.
    The display mechanism of the date as shown in the figures further comprises a date-driven mobile formed of a date drive wheel 4 and a date actuator 5. In the illustrated embodiment, the date actuator 5 is in the form of a calendar finger mounted loosely on the axis of the date driving wheel 4 and connected thereto by means of a pin 41 fixed in said date driving wheel 4 and passing through an oblong hole 51 of the date actuator 5.
    The mobile date drive and in particular the date drive wheel 4 are rotated by the finishing gear of the timepiece at a rate of one revolution per day in the present embodiment.
    The date actuator 5 is arranged to cooperate once a day, at midnight, with a date wheel 6 to advance one step.
    According to the invention, the date display mechanism further comprises a cam 7 integral with the date wheel 6 and carrying the needle 1. A lever 8 is arranged to cooperate with said cam 7. The lever 8 is pivoted at a fixed point B of the timepiece and is subjected to the action of an elastic force, here a lever spring 9, in particular arranged to constrain the lever 8 in contact with the cam 7. In the form of illustrated embodiment, the lever spring 9 acts by one of its ends on a pin 81 fixed on the lever 8.
    The cam 7 preferably has a general shape snail and comprises at least a smooth portion 71 without tooth and at least a toothed portion 72. In the embodiment shown, the smooth portion 71 extends between the point of smaller radius and the point of greater radius of the cam 7, while the toothed portion 72 extends over the rest of the periphery of the cam 7.
    Preferably and to reduce the number of parts of the mechanism and the necessary adjustments, the cam 7 came in one piece with the barrel carrying the needle 1.
    The active end of the lever 8 is intended to cooperate with the toothing of the toothed portion 72 and slide on the smooth portion 71 of the cam 7.
    In the illustrated embodiment, the toothed portion 72 comprises 30 teeth and the smooth portion 71 extends in a sector whose angular distance corresponds to the angular distance of the sector 3 without reference to the graduation 2.
    The operation of the date mechanism according to the illustrated embodiment will now be described in detail with reference to the figures.
    FIG. 1 illustrates the mechanism in the position it occupies on the 15th of the month around 18:00. The date driving wheel 4 is driven by the finishing gear of the timepiece and itself drives the date actuator 5 via the pin 41. Said date actuator 5 is not in the path of the toothing of the date wheel 6. Said date wheel 6 is locked via the lever 8 whose active end is in abutment between two teeth of the toothed portion 72 of the cam 7, constrained by the lever spring 9. The cam 7, the date wheel 6 and the needle 1 are thus locked in an angular position corresponding to the 15th of the month on the graduation 2.
    From this position, the date driving wheel 4 is always driven by the finishing train and at midnight, the active end of the date actuator 5 is in the path of the toothing of the date wheel 6 At midnight, said date actuator 5 driven by the date driving wheel 4 will therefore drive the date wheel 6 a step. The cam 7 secured to the date wheel 6 also pivots and raises the lever 8 against the action of its spring 9. The active end of said lever 8 leaves the space between two teeth of the toothed portion 72 before falling back into the space between two teeth along said toothed portion 72. The lever 8 subjected to the action of its spring 9 thus acts as a jumper to ensure the angular position of the cam 7 and thus the date wheel 6 and the Needle 1. Following the pivoting of a step of the date wheel 6 and the cam 7, the needle 1 now points to the mark 16 of the graduation 2 (position not shown).
    In the illustrated embodiment, the successive marks 1 to 31 of the graduation 2 are each separated by a first angular distance. The toothing of the toothed portion 72 of the cam 7 thus comprises 30 teeth defining the 30 steps necessary to pass from the 1st of the month to the 31st of the month.
    Figs. 2 and 3 illustrate the mechanism in the position it occupies on the 31st of the month just before midnight. The date wheel 6 is locked via the lever 8 whose active end is in abutment, constrained by the lever spring 9, in the space between the point of greatest radius of the smooth portion 71 of the cam 7 and the tooth of the toothed portion 72 directly adjacent to said point of the smooth portion 71 of the cam 7. The cam 7, the date wheel 6 and the needle 1 are thus locked in an angular position corresponding to the 31 of the month on the graduation 2.
    The date driving wheel 4 is driven by the finishing gear of the timepiece and drives itself the date actuator 5 via the pin 41. At midnight, said date actuator 5 comes in the path. of the toothing of the date wheel 6 and carries it as illustrated in FIG. 4. The date wheel 6 and the cam 7 then pivot and said cam 7 raises the lever 8 against the action of its spring 9. The active end of said lever 8 comes out of the space between the point of largest radius of the smooth portion 71 of the cam 7 and the tooth of the toothed portion 72 directly adjacent to said point of the smooth portion 71 of the cam 7 and comes into contact with the smooth portion 71 of the cam 7, constrained by its spring 9 (FIG. 5).
    The smooth portion 71 of the cam 7 is shaped in particular so that, under the action of its spring 9, the levers resting on this smooth portion 71 rotate the cam 7 by an angle corresponding to the angle of the sector 3 of the graduation 2 between the marks 31 and 1. The cam 7 and therefore the date wheel 6 and the needle 1 rotate thus pushed by the lever 8 which slides along the smooth portion 71 (see Fig. 5 and 6) until the active end of the lever 8 returns to the toothed portion 72 of the cam 7 and abuts in the space between the point of the smallest radius of the smooth portion 71 and the tooth of the portion tooth 72 immediately adjacent to said point (Fig. 7). At this moment, the cam 7 and the date wheel 6 are again locked in a determined angular position in which the needle 1 is opposite the mark 1 of the graduation 2. The needle 1 has thus crossed the sector 3 without mark of graduation 2 in one step or jump, without stopping in said sector 3.
    As seen in FIG. 4, when the cam 7 and the date wheel 6 begin to pivot under the action of the sliding lever 8 on the smooth portion 71, the date actuator 5 is still partially in the path of the date wheel 6. For avoid any breakage of the mechanism, said actuator 5 is arranged to be pivotable relative to the pin 41 without driving the date drive wheel 4 (see Figures 5 and 6).
    Preferably and as described above, the display mechanism according to the invention is for a jumping display (semi-instantaneous) and not dragging. In the illustrated embodiment, the toothed portion 72 of the cam 7 has a variable tooth pitch, decreasing with the radius of the cam 7. This contributes to the fact that when the lever 8 bears against a portion of the cam 7 of small radius, the force required to lift the lever 8 against the action of its spring 9 is lower than that required to lift the lever 8 against the action of its spring 9 when said lever 8 is in abutment against a larger portion of the cam 7. The variable tooth pitch thus ensures that each jump of the needle 1 between the marks 1 to 31 is substantially equal.
    In the illustrated embodiment, the graduation 2 is such that a first angular distance separates two successive marks for the marks from 1 to 31 and a second larger angular distance separates the marks 31 and 1, causing the needle 1 to make a jump of greater amplitude. As a variant, the graduation 2 could comprise two or more jumps of greater amplitude than the others, of equal or different angular distances. In this case, the cam 7 comprises as many smooth portions of corresponding angular distance, possibly interspersed with toothed portions corresponding to the sectors of the graduation in which the marks are distributed uniformly (same angular distance between two successive marks).
    As indicated above, in the illustrated embodiment, the lever 8 and its spring 9 play the role of a positioning jumper. These two elements could therefore be replaced by a jumper or other suitable one-piece elastic element arranged to cooperate with the cam.
    In the illustrated embodiment, the display mechanism is a date mechanism. Other display mechanisms are conceivable, such as a time display in which the minute hand would make a larger jump between two marks, for example at the end of one hour between the mark 60 and the mark 1.
    Similarly, the indicator could have any suitable shape as it is arranged to pivot concentrically to the graduation and cooperate with it.
    The display mechanism according to the invention makes it possible to blow up an indicator, in particular a pointer, over another display or another complication of the timepiece that it equips, such as a moon phase or a whirlwind. The visibility of this other display or complication is not embarrassed. The display mechanism according to the invention also allows the use of a concentric scale to the indicator but whose marks are not all evenly distributed on its circumference. The mechanism according to the invention is of simple construction and can bulky and easily adapts to various displays.
    权利要求:
    Claims (11)
    [1]
    claims
    1. Display mechanism for a timepiece comprising a graduation (2), an indicator (1) concentrically pivoted to said scale (2) and with which it cooperates, a display unit (6, 7) arranged to drive in rotation said indicator (1), a driving mobile (4, 5) for driving the display mobile (6, 7) in rotation and elastic means (8, 9) for ensuring the angular positions of the mobile of display (6, 7), said graduation (2) comprising marks distributed over a circumference, at least two consecutive first marks being separated by a first angular distance greater than a second angular distance separating two consecutive second marks, characterized by the the display unit (6, 7) comprises a cam (7) integral with said indicator (1) and having at least a first toothless portion (71) and at least one second toothed portion (72); in that the said resilient means (8, 9) are forced in abutment against the cam (7) and arranged to determine the angular positions of the cam (7), and therefore of the indicator (1), when they cooperate with said at least one second tooth portion (72); and in that the cam (7) and the elastic means (8, 9) are arranged in such a way that the cam (7) pivots by an angle equal to the first angular distance when said elastic means (7, 8) cooperate with the first portion (71) of the cam (7).
    [2]
    2. Mechanism according to claim 1, characterized in that the display mobile (6,7) further comprises a display wheel (6) integral with the cam (7) and engaged with the driving carrier (4). , 5) for its rotational drive.
    [3]
    3. Mechanism according to claim 2, characterized in that the driving mobile (4, 5) comprises a driving wheel (4) arranged to be rotated by a movement of the timepiece.
    [4]
    4. Mechanism according to claim 3, characterized in that the driving wheel (4, 5) further comprises an actuator (5) driven by the driving wheel (4) and arranged to cooperate with the display wheel (6). ) to make it turn step by step.
    [5]
    5. Mechanism according to claim 4, characterized in that the actuator (5) is connected to the driving wheel (4) by means of a pin (41) fixed in the driving wheel (4) and passing through an oblong hole (51) of the actuator.
    [6]
    6. Mechanism according to one of the preceding claims, characterized in that the elastic means comprise a lever (8) pivoted at a fixed point of the timepiece and subjected to the elastic action of a spring (9) tending to hold it against the cam (7).
    [7]
    7. Mechanism according to one of the preceding claims, characterized in that the second toothed portion (72) of the cam (7) has a toothing variable tooth pitch.
    [8]
    8. Mechanism according to one of the preceding claims, characterized in that the cam (7) has essentially the shape of a snail, the first portion (71) extending in particular between a first point of larger radius and a second point of smaller radius.
    [9]
    9. Mechanism according to one of the preceding claims, characterized in that the indicator (1) is a needle (1).
    [10]
    10. Mechanism according to one of the preceding claims, characterized in that the display mechanism is a date display mechanism.
    [11]
    11. Timepiece comprising a display mechanism according to one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    CH713209B1|2020-08-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01619/16A|CH713209B1|2016-12-08|2016-12-08|Display mechanism for timepiece.|CH01619/16A| CH713209B1|2016-12-08|2016-12-08|Display mechanism for timepiece.|
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