• 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 chronograph mechanism (1) comprising: three time indicators, each time indicator being mounted on an axis (30A, 30B, 30C), a core (4A, 4B, 4C) being mounted on each shaft, a device for simultaneous resetting of the three time indicators, comprising at least two levers (5, 6) and three hammers (7A, 7B, 7C) distributed on said levers, each hammer acting on one of said cores to immobilize it in a predetermined position, said levers being all rotated about the same axis of rotation.
    公开号:CH713375A1
    申请号:CH00058/17
    申请日:2017-01-18
    公开日:2018-07-31
    发明作者:Geneau De Lamarlière Gaylord；Chatelain Yannick
    申请人:Zenith Succursale De Lvmh Swiss Mft Sa；
    IPC主号:
    专利说明:

    Description
    TECHNICAL FIELD [0001] The present invention relates to a chronograph mechanism with a simultaneous resetting device of the duration indicators.
    STATE OF THE ART [0002] Chronograph needles mounted on the same axis as a reset heart are known in the prior art. When the reset pushbutton is actuated, it releases hammers that fall on these cores and immobilize them in a predetermined angular position corresponding to the zeros of the duration indicators.
    An example of resetting device chronograph duration indicators is described in EP 2 045 672 B1. This document describes a mechanism with two cores that can be immobilized by means of two hammers. The two hammers are mounted on the same lever which moves during the actuation of zeroing being guided by pins engaged in oblong openings. This device allows the setting of two time indicators to zero, but is not suitable for meters having more than two time indicators, for example to indicate the hours, minutes and seconds of a duration measured by the chronograph. In addition, the movement of the lever is a complex combination of rotations and translations that does not guarantee simultaneous support of the two hammers against the two cores; there may therefore be a slight time difference between the strikes of the different hammers on the corresponding cams, which is undesirable.
    [0004] A mechanism for resetting three chronograph duration indicators is described in particular in EP 2,073,078 B1. This device comprises three cores operated by three separate hammers. Two of the hammers are mounted on one arm while the third hammer is separately mounted on a second arm. This mechanism is complex. In addition, the movements of the two arms are complex combinations of rotations and translations that do not ensure a perfect synchronization of reset times, especially in case of inaccuracy due to manufacturing tolerances.
    BRIEF SUMMARY OF THE INVENTION [0005] An object of the present invention is to provide a chronograph mechanism comprising a device for simultaneously resetting three time indicators which is free from the limitations of the mechanisms above.
    According to the invention, these objects are achieved in particular by means of a chronograph mechanism comprising: - three time indicators, each time indicator being mounted on an axis, a heart being mounted on each shaft, - a device simultaneous resetting of the three time indicators comprising at least two levers and three hammers distributed on said levers, each hammer acting on one of said cores to immobilize it in a predetermined position, said levers being all rotated about the same axis of rotation.
    The mounting of the levers in rotation allows a simplified construction and a movement of the hammers in a simple and easy to control trajectory. The device is therefore less sensitive to manufacturing tolerances.
    In an advantageous embodiment, the hammers are all at equal distance from the center of rotation. This allows the three hammers to hit the corresponding cores simultaneously and with the same strength, and thus to ensure a perfectly synchronized reset of the three time indicators.
    In a preferred embodiment, the mechanism comprises a first lever with two hammers and a second lever with a single hammer, the two levers being mounted in rotation about the axis of rotation. This solution reduces the number of levers required.
    The simultaneous movement of the two levers can be obtained using a part, for example a V-shaped part, having a first branch connected to one end of the first lever and a second branch connected to the second lever to move simultaneously the three hammers when the V-piece is moved. Thus, the two levers are operated simultaneously by the same piece.
    The V-shaped part is itself driven during the reset to zero through an actuation point at the intersection of the two branches of the V-shaped part, equidistant from the connection points to the two levers.
    The connection between the branches of the V-piece and the levers comprises a pin engaged in an oblong opening. This makes it possible on the one hand to convert the movement of the V-shaped part into a rotational movement of the two levers, and on the other hand to compensate for any manufacturing gaps or tolerances.
    The V piece acts by causing the increase in the angle between said branches during the reset. The two levers are thus mounted in the manner of the branches of a chisel, the V-piece acting on the handles of the chisel to open at the reset.
    The mechanism may comprise an actuating part of the resetting device, which can be rotatably mounted about an axis in order to pivot in case of actuation of a push button reset.
    The actuating part may incorporate a deformable portion to protect the reset device in case of excessive support or shock on the push button.
    BRIEF DESCRIPTION OF THE FIGURES [0016] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:
    Fig. 1 illustrates an overview of a chronograph mechanism according to one embodiment of the invention.
    Fig. 2 illustrates the position of the reset mechanism and time indicators after the actuation of the stop pushbutton.
    Fig. 3 illustrates the position of the reset mechanism and time indicators upon depression of the reset pushbutton.
    Fig. 4 illustrates the position of the reset mechanism and time indicators upon releasing the reset pushbutton.
    Example (s) of Embodiment of the Invention [0017] FIG. 1 shows a chronograph mechanism 1 according to one embodiment of the invention, seen from the bottom of the watch. It comprises a pushbutton 102 for starting and stopping the chronograph, said start-stop button, and a push button 101 for resetting the chronograph.
    The start-stop mechanism (said "start-stop" mechanism) will not be further detailed here, but includes a set of levers operated by the push-button 102 to actuate a whip 21 causing the start of the pendulum 20 during the start of the chronograph, and almost instantaneous immobilization of the balance at the second pressing of the push button 102 causing the stop pendulum and counting the duration measured by the chronograph.
    The chronograph comprises three indicators of measured duration 3A, 3B, 3C, for example a needle 3A for hundredths of a second of the chronograph, a 3B needle for the seconds of the chronograph and a 3C needle for the chronograph minutes. Needles are not shown for the simplification of figures.
    Each measured duration indicator 3A, 3B, 3C is mounted on an axis 30A, 30B, 30C respectively. A core 4A, 4B, 4C is mounted respectively on these axes. The term "core" designates in this application a cam, preferably in the form of a heart, the function of which is to immobilize the corresponding axis in a predetermined angular position. For this purpose, each core preferably comprises a bearing portion 40A, 40B, respectively 40C for positioning the heart and the corresponding axis by pressing a hammer 7A, 7B or 7C against this bearing portion. The duration indicator is mounted on the axis so as to point to zero when the corresponding hammer rests on the bearing portion of the corresponding core.
    Two of the hammers 7A, 7C are mounted on a first lever 5, one at each end. The last hammer 7B is mounted on a second lever 6. The two levers 5,6 are mounted in rotation on a common axis 8. The length and shape of the levers is arranged so that the hammers 7A, 7B, 7C are all at the same distance from the point of rotation 8, and they must further travel the same angular path when actuating the zeroing device.
    The geometry of the cores 4 and hammers 7 is determined so that the support of the hammer on the corresponding heart causes the rotation of the heart ensuring the return of the corresponding duration indicator, regardless of the angular position. of the heart. For this purpose, the direction of the force applied by the hammer on the side of the heart does not cross the axis of rotation of the heart.
    The levers 5 and 6 are rotated during the actuation of the reset button 101 through the V-shaped part 9. The part 9 comprises two arms 90, 91. One end of the arm 90 is connected to the end 50 of the first lever 5 through the pin 92 integral with the part 9 and engaged in the orifice 51 through the lever 5. In the same way, one end of the arm 91 is connected to the end 60 of the second lever 6 through the pin 93 secured to the part 9 and engaged in the orifice 61 through the lever 5.
    The V-shaped part 9 is itself moved in a rotational movement or quasi-translation thanks to the actuating part 10 connected to the V-shaped part through the pin 94. The displacement of the V-piece when zeroing causes the spacing of the levers 5, 6, in the manner of the scissors branches, and the increase of the opening angle a between these levers.
    The actuating part 10 is connected to the V-shaped piece through the pin 94 projecting from a side of the V-shaped piece, at the intersection of the two branches 90, 91 of this piece and equidistant In this way, the displacement of the V-shaped part during the actuation of the push-button 101 causes a simultaneous rotation and at the same angular speed of the two levers 5, 6.
    The actuating part 10 is rotated during the actuation of the push button 101 about the axis of rotation 100. A deformable portion 103 bears against the pin 104 connected to a bridge or plate movement allows pushing the push button outward when released. The portion 105 of the actuating part 10 forms another blade to protect the device in case of excessive support or shock against the push-button 101.
    Figs. 1 and 2 illustrate the position of the hammers 7 during the start of the chronograph and respectively when it is stopped by pressing the push-button start-stop 102. In these positions, the hammers are at a distance from the cores whose position is determined solely by the wheel.
    Fig. 3 illustrates the position of the hammers 7 during and just after pressing the push button 101 to zero. In this position, the hammers 7 are pressed against the bearing surfaces 40 of the cores, whose position is thus determined.
    Fig. 4 illustrates the position of the hammers 7 after releasing the push button 101 to zero. In this position, the hammers 7 are at a distance from the hearts, which nevertheless retain their determined position.
    Reference numbers used in figures [0030] 1 Chronograph mechanism 3A, 3B, 3C Time indicators 30A, 30B, 30C Axes for duration indicators 4A, 4B, 4C Hearts 40A, 40B, 40C Supporting portions 5 First lever 50 End of first lever 51 Oblong opening through end 50 6 Second lever 60 End of second lever 61 Oblong opening through end 60 7A, 7B, 7C Hammers 8 Axis of rotation of levers
    9 Piece V
    90 First branch of the V-piece
    91 Second leg of the V-piece 92 Pin on the first leg 93 Pin on the second leg
    94 V-Workpiece Actuation Point 10 Actuating Part 100 Actuator Rotation Axis 101 Reset Pushbutton 102 Start-Stop Pushbutton 103 Deformable Portion 104 Pin
    权利要求:
    Claims (8)
    [1]
    105 Safety blade a Angle between the levers 5, 6 Claims
    Chronograph mechanism (1) comprising: three duration indicators (SA, 3B, 3C), each duration indicator being mounted on an axis (30A, 30B, 30C), a core (4A, 4B, 4C) being mounted on each shaft; - a device for simultaneously resetting the three time indicators, comprising at least two levers (5, 6) and three hammers (7a, 7B, 7C) distributed on said levers, each hammer acting on one of said cores for immobilizing it in a predetermined position, characterized in that said levers (5, 6) are all mounted in rotation about the same axis of rotation (8).
    [2]
    2. Chronograph mechanism according to claim 1, wherein said hammers (7A, 7B, 7C) are all equidistant from said center of rotation (8).
    [3]
    3. Mechanism according to one of claims 1 or 2, comprising a first lever (5) with two hammers (7A, 7C) and a second lever (6) with a single hammer (7B), the two levers being rotatably mounted. around said axis of rotation (8).
    [4]
    4. Mechanism according to claim 3, comprising a part (9) with a first leg (90) connected to one end (50) of the first lever (5) and a second leg (91) connected to one end (60) of the second lever (60) for simultaneously moving the three hammers (7A, 7B, 7C) when said workpiece is moved.
    [5]
    5. Mechanism according to claim 4, the connection each of said legs (90, 91) and the corresponding levers (5, 6) comprising a pin (92, 93) engaged in an oblong opening (51,61) through said ends ( 50, 60).
    [6]
    6. Mechanism according to one of claims 4 or 5, said piece (9) causing the increase of the angle (a) between said levers (5, 6) during resetting.
    [7]
    7. Mechanism according to one of claims 4 to 6, comprising an actuating part (10) of the reset device, said actuating part being rotated about an axis (100) to pivot in when a push-button (101) is actuated to reset, said actuating part integrating a deformable portion (105) in order to protect the reset device in the event of a strong support on said push-button .
    [8]
    8. Mechanism according to claim 7, said actuating part further incorporating a deformable blade to push said push button.
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    同族专利:
    公开号 | 公开日
    CH713375B1|2020-12-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3495397A|1967-06-14|1970-02-17|Valjoux Sa|Return to zero mechanism of two chronograph counters|
    CH697433B1|2007-04-04|2008-10-15|D Horlogerie Minerva Sa Fab|Time piece i.e. chronograph watch, has rotative unit comprising lower stage for controlling movement of hammer, and upper stage cooperating with portion of whip for controlling displacement of whip during setting-up and stopping of motor|
    EP2073077A1|2007-12-21|2009-06-24|Omega SA|Shockproof device for a timepiece control element|
    CH704752B1|2008-03-31|2012-10-15|Manuf La Joux Perret Sa|Linear hammer for resetting counters of chronograph mechanism, has three active parts engaged with heart-shaped cam of chronograph mechanism, where two of parts are arranged at both sides of longitudinal axis of body on lever|
    EP2241943A2|2009-04-15|2010-10-20|Patek Philippe SA Genève|Chronograph mechanism and timepiece equipped with such mechanism|
    法律状态:
    2019-03-29| PCOW| Change of address of patent owner(s)|
    优先权:
    申请号 | 申请日 | 专利标题
    CH00058/17A|CH713375B1|2017-01-18|2017-01-18|Chronograph mechanism comprising a device for simultaneously resetting the duration indicators.|CH00058/17A| CH713375B1|2017-01-18|2017-01-18|Chronograph mechanism comprising a device for simultaneously resetting the duration indicators.|
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