EP3701336A1 - Dispositif de correction pour piece d'horlogerie - Google Patents
Dispositif de correction pour piece d'horlogerieInfo
- Publication number
- EP3701336A1 EP3701336A1 EP18789074.4A EP18789074A EP3701336A1 EP 3701336 A1 EP3701336 A1 EP 3701336A1 EP 18789074 A EP18789074 A EP 18789074A EP 3701336 A1 EP3701336 A1 EP 3701336A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- correction
- input
- correction device
- inlet
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
- G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
- G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
- G04B19/25—Devices for setting the date indicators manually
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B27/00—Mechanical devices for setting the time indicating means
- G04B27/001—Internal gear therefor, e.g. for setting the second hand or for setting several clockworks
Definitions
- the present invention relates to the field of watchmaking. It relates, more particularly, a correction device for a timepiece.
- a correction device is necessary to allow the user to adjust the information displayed by this device.
- This adjustment can be made through the time setting rod, a dedicated rod, other dedicated means such as one or more pushers or the like.
- Some of these correction devices can have a negative impact on the movement, for example by applying a torque that can damage the movement if the manual correction is made around midnight, while the drives of the display devices are occur.
- the document FR2541005 proposes to connect the movement to a date display device via a differential gear which is part of the correction device.
- the first input of this differential is driven by the movement, the second input is driven by an external maneuvering member, such as a time-setting rod and the output in turn causes the display of the date. Thanks to the intervention of the differential, no harmful torque can be exerted on an element of the movement during a correction, and this correction can be done in both directions if the display device is arranged appropriately.
- the synchronization of the display of each of these information is essential so that the device correctly displays the information and also for the indications to advance at the right time.
- a solution that is often applied is that of providing correction means dedicated to each of the sub-displays (date, day, month, year, moon phase, etc.) that are associated with pushbuttons or correctors. .
- Each pusher thus acts on the corresponding sub-display, which requires several operations to update the mechanism.
- these correctors typically act in one direction, so to obtain a correction of a step in the other direction, it is necessary to travel the rest of the cycle in the direction of correction, which can, depending on the construction of the display device, also unregulate a downstream sub-display. In such a case, the latter must also be corrected in turn.
- Document EP0191921 describes a solution to this problem by proposing a perpetual calendar in which the correction of the calendar data is effected by means of the time setting rod. It is thus impossible to desynchronize the different information.
- the motion kinematics allows only one-way correction.
- the object of the invention is therefore to provide a timepiece in which the aforementioned defects are at least partially overcome.
- the invention relates to a correction device for a timepiece, which comprises a differential gear having a first input, a second input and an output.
- the first input of said differential is arranged to be driven by a watch movement, for example by being driven directly by the movement, due to a turn in 12 hours.
- the second input is in kinematic connection with a corrector gear extending from a control member and having a clutch for establishing and interrupting the kinematic connection between said control member and said second input.
- the output is arranged to drive a display device of the watch movement, and the angular position of the output is defined as a function of the angular position of said first input and that of said second input, each input providing thus a contribution to the angular position of the output.
- said correction device further comprises a memory cam in desmodromic connection with the second input.
- This memory cam is subjected to a restoring force provided by an elastic member, such as a spring, tending to maintain the memory cam in at least one predetermined angular position when the kinematic connection between the control member and the second input is interrupted, that is, when no correction is made.
- an elastic member such as a spring
- the correction device is arranged, in particular at the gear ratios concerned, to ensure that the incidence of rotation of the second input during a correction, on the angular position of the output is canceled when the memory cam is in said at least one predetermined angular position.
- the predetermined angular position of the memory cam puts the second input in a "neutral" position when the kinematic connection between the control member and the second input is interrupted.
- the angular position of the second input contributes to defining any way the angular position of the output, adding or deduced from the angular position defined by the first input.
- the output is out of sync with the first input.
- the memory cam is connected desmodromique with the second input, it is arranged to "memorize" the angular difference corresponding to this shift.
- FIG. 1 is an isometric view of a correction device according to the invention.
- FIG. 2 is an isometric view of the correction device of FIG. 1, illustrated jointly with mobiles with which it interacts;
- Figure 3 is the view of Figure 2 cut along a plane which intersects the axis of rotation of the differential gear and extends from the correction rod;
- Figure 4 is an isometric view of a portion of the differential gear illustrated in Figures 1 to 3;
- FIG. 5 is a view similar to that of Figure 4, one of the toothed boards having been removed.
- Figure 1 illustrates an embodiment of a correction device 1 according to the invention, given by way of non-limiting example.
- This correction device 1 is intended to correct the information displayed by any display device, such as an annual calendar mechanism, but may also apply to a simple, perpetual or similar calendar. This correction can advantageously be carried out in both directions.
- the device 1 comprises a differential gear 3, some details of which are better visible in Figures 4 and 5.
- the differential gear 3 has a first input 5 intended to be driven by a watch movement.
- the device can be arranged on a module intended to be driven by a basic movement (not shown), but the application to an integrated construction is also possible.
- the movement is intended to drive the first input 5 at an ad hoc angular velocity (typically a turn in 12 hours), and takes the form of a toothed wheel rotationally fixed to a sun gear 7 located at the geometric center.
- the first input 5 can be driven by any kind of drive system, such as a meshing with the hour wheel of the movement.
- the first input is integral in rotation with the wheel of the hours of movement and is driven at a rate of one turn in 12 hours.
- other drive speeds are possible.
- the differential 3 further comprises a second input 9, which is a planet carrier provided with an external toothing and on which a plurality of planet gears 17 are pivoted. These meshes with the sun gear 7.
- the external toothing of this carrier meshes with a correction gear 1 1 which is in kinematic link disengageable with a correction member 19, in the form of a correction rod 19.
- This rod 19 can also act as a winding stem.
- the correction member may take other forms, such as a rotating bezel or a rotating bottom.
- the output 13 of the differential gear comprises two toothed plates 13a, 13b each having 24 teeth and superimposed relative to one another and mutually integral in rotation, for example by means of a key-groove system. .
- These boards 13a, 13b are integral in rotation with a ring 15 provided with an internal toothing which meshes with the planet gears 17.
- the correction gear 1 1 and therefore the second input 9 remain stuck at rest as described below.
- the output 13 is therefore driven exclusively as a function of the rotation of the first input 5, via the sun gear 7 and satellites 17.
- the direction of rotation of the output 13 is thus the opposite of that of the first input 5, and is subjected to an angular speed reduction, due to the gear ratio of the differential.
- the first input 5 rotates in 12 hours and its gear ratio with the output 13 is 0.5. Therefore, the latter performs one turn in 24 hours, as it is suitable for training a date device.
- the upper board 13a carries a drive tooth 37 which is longer than the other teeth of said board.
- the lower board 13b also carries longer drive teeth as is generally known in the context of annual or perpetual calendar device training, for end-of-month training of less than 31 days and / or for operate another display device. Other speeds of rotation are of course possible depending on the construction of the display device and the differential gear 3.
- the first input 5 remains (almost) immobile, under the action of the movement and the exhaust, and the second input 9 pivots following a rotation of the correction rod 19 which is transmitted through the correction train 1 1.
- the rotation of the second input 9 is subsequently transmitted to the output 13 by the rotation of the satellites 17 around the center of the differential, and by the rolling of the latter on the solar pinion 7 which remains (almost) immobile.
- the directions of rotation of the second input 9 as well as of the output 13 are thus the same, but the rotational speed of the output is lower than that of the second input, at a ratio of 2/3 in the operating mode. illustrated embodiment.
- the correction wheel has no influence on the base movement during a correction
- the rotation of the output 13 is a function of each of the two inputs 5, 9.
- the output 13 drives the display device at a rate of one step, each turn it performs.
- the device 1 comprises means which make it possible to return the output 13 substantially in its initial angular orientation, prior to the correction, once the correction is completed.
- the correction gear 1 1 comprises on the one hand a clutch 21 for establishing and interrupting the kinematic connection between the correction rod 19 and the second input 9 according to the axial position of the rod 19 and, on the other hand, a memory cam 23.
- the clutch 21 may be of any type, such as sliding pinion and pull, rocker, a horizontal clutch, a unidirectional clutch or the like, for example as illustrated in CH1016.
- the clutch comprises a sliding pinion 25 actuated by a pull tab not shown. The axial position of the sliding pinion 25 determines whether the latter is rotatably connected to the rod 19 or not.
- Other means for controlling the clutch 21 are within the reach of those skilled in the art.
- the memory cam 23 is integral in rotation with a wheel 27 which is in desmodromic connection with the second input 9.
- the wheel 27 meshes with a mobile 29 forming part of the kinematic linkage chain. the clutch 25 at the second input 9.
- the memory cam 23 may be arranged integral in rotation with an element of this kinematic chain or be integrated with the second input 9 of the differential gear 3. Still alternatively, the memory cam 23 may be in connection with said second entry 9 through his own dedicated gear.
- the shape of the memory cam 23 was chosen to optimize the available torque after correction. In most cases, a correction will be made in the direction of an advance of the indications provided by the display device following a stop of the piece for a certain time. Corrections in the other direction are more rare, and therefore the memory cam 23 may have an asymmetrical shape arranged to provide more torque in one direction of rotation than in the other. However, it is quite possible to use a symmetrical cam or that has another adapted form.
- the clutch 21 is disengaged and the memory cam 23 is positioned by a restoring force provided by a spring 31 whose position is controlled by the axial position of the rod 19.
- the spring 31 is positioned so as to exert sufficient force on the memory cam 23 so that it blocks the gear wheel 1 1 against possible parasitic couples emanating from the rotation of the first input 5 and the output 13.
- the second input 9 is also locked in a predetermined angular position of such so that the output 13 remains synchronized with the first input 5.
- the spring 31 is mounted on the rod 19, but other constructions are within the reach of those skilled in the art. It is also possible that the spring 31 is mounted on a frame member independently of the control member 19.
- the axial displacement of the rod 19 lifts the spring 31 so that the latter exerts less pressure on the memory cam 23, to facilitate a correction operation.
- the output 13 of the differential 3 is rotated according to the rotations of the rod 19 and the display device that it controls, can be corrected.
- the memory cam 23 is also rotated.
- the memory cam 23 is heart-shaped with a single lobe, and its gear ratio with the second input 9 is chosen such that the memory cam 23 pivots at a rate of one. complete revolution by rotation of the output 13 under the control of the angular displacements of the second input 9.
- the ratio of gears between the second input 9 and the output 13 is 2/3 (which implies that 1, 5 turns of the second input 9 drives the output 13 by one turn)
- that between the second input 9 and the memory cam 23 is 1, 5.
- the memory cam 23 may have several lobes and rotate at the rate of, for example, a third or a quarter of a turn per complete rotation of the output 13, depending on the number of lobes.
- the second input 9 will have several angular orientations for which its contribution to the angular position of the output
- the memory cam 23 "stores" the contribution to the angular position of the output 13 provided by the second input 9.
- the output 13 thus returns to the angular position it would have had in the absence of a correction, and its angular position is again only defined by the first input 5.
- the output 13 does not perform than whole turns after the addition or subtraction performed under the control of the memory cam, notwithstanding any impact of the first input during the correction. In the context of a perpetual calendar, this has the effect that the date jump is made around midnight even after a correction.
- Figures 2 and 3 illustrate the correction device 1 of the invention in combination with kinematically adjacent components of an annual calendar device, to better illustrate the meaning of the functionality of said correction device 1.
- the annual calendar device comprises a programming wheel 33 which comprises a calendar plate 35 having 31 teeth and a correction plate 39 coaxial with the date plate 35.
- the latter is arranged to be driven at the rate of one step per 24 hours via the actuating tooth 37 which extends from the board gear 13a of the output.
- the toothed plate 13b has a plurality of longer teeth that interact with a corresponding tooth of the correction board 39 to advance the programming wheel by one additional step at the end of the thirty-day month.
- the various boards each have a suitable number of teeth, depending on the number of days of the month.
- the correction board 39 and the board 13b can be omitted.
- a display mechanism of the days of the week as well as moon phases 41 which is driven through the lower plate 13b of the output 13, and which must not not be described in more detail.
- the output 13 must rotate one turn at a rate of correction of the programming wheel 33. Moreover, if after a correction, the output 13 is out of adjustment with respect to the programming wheel 33, its advance will take place at a time not desired.
- the correction device may directly or indirectly drive a display member, for example a single date, the construction of the output 13 being adapted accordingly.
- the output could simply carry a single finger for the direct or indirect drive of a date crown.
- the differential gear it is not mandatory that its output 13 directly carries a board 13a, 13b or a similar element that directly interact with a programming wheel 33, a mobile date or a display member. Indeed, the output 13 may be a gear which in turn drives an intermediate mobile which directly or indirectly drives such an element.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH01294/17A CH714267A1 (fr) | 2017-10-24 | 2017-10-24 | Dispositif de correction pour pièce d'horlogerie. |
| PCT/EP2018/078100 WO2019081253A1 (fr) | 2017-10-24 | 2018-10-15 | Dispositif de correction pour piece d'horlogerie |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3701336A1 true EP3701336A1 (fr) | 2020-09-02 |
| EP3701336B1 EP3701336B1 (fr) | 2021-12-01 |
Family
ID=60412993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18789074.4A Active EP3701336B1 (fr) | 2017-10-24 | 2018-10-15 | Dispositif de correction pour pièce d'horlogerie |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11635732B2 (fr) |
| EP (1) | EP3701336B1 (fr) |
| JP (1) | JP7186771B2 (fr) |
| CN (1) | CN111279274B (fr) |
| CH (1) | CH714267A1 (fr) |
| WO (1) | WO2019081253A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4254075B1 (fr) * | 2022-03-30 | 2025-12-24 | Harry Winston SA | Dispositif de commande déporté d'un mouvement horloger d'une montre et montre comprenant ledit dispositif de commande |
| CH720202A1 (fr) * | 2022-11-04 | 2024-05-15 | Van Cleef & Arpels SA | Dispositif d'entraînement pour mécanisme horloger |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH575614B5 (fr) | 1971-02-09 | 1976-05-14 | Omega Brandt & Freres Sa Louis | |
| JPS5853755B2 (ja) * | 1978-02-08 | 1983-12-01 | セイコーエプソン株式会社 | 時差修正装置付き暦時計 |
| US4443112A (en) * | 1982-09-29 | 1984-04-17 | Timex Corporation | Planetary gear for date mechanism in a wristwatch |
| DE3505733C1 (de) * | 1985-02-20 | 1986-10-23 | IWC International Watch Co AG, Schaffhausen | Uhr |
| CN103842916B (zh) * | 2011-09-01 | 2017-06-16 | 劳力士有限公司 | 能够显示两个时区的计时器 |
| EP2615506B1 (fr) * | 2012-01-10 | 2014-06-25 | Montres Breguet SA | Dispositif de correction rapide d'un système d'affichage |
| EP2824517B1 (fr) * | 2013-07-12 | 2025-04-23 | Rolex Sa | Mécanisme horloger, mouvement horloger et pièce d'horlogerie |
-
2017
- 2017-10-24 CH CH01294/17A patent/CH714267A1/fr not_active Application Discontinuation
-
2018
- 2018-10-15 JP JP2020520766A patent/JP7186771B2/ja active Active
- 2018-10-15 US US16/755,285 patent/US11635732B2/en active Active
- 2018-10-15 WO PCT/EP2018/078100 patent/WO2019081253A1/fr not_active Ceased
- 2018-10-15 CN CN201880066718.7A patent/CN111279274B/zh active Active
- 2018-10-15 EP EP18789074.4A patent/EP3701336B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111279274A (zh) | 2020-06-12 |
| US20200249628A1 (en) | 2020-08-06 |
| CH714267A1 (fr) | 2019-04-30 |
| CN111279274B (zh) | 2021-07-27 |
| EP3701336B1 (fr) | 2021-12-01 |
| US11635732B2 (en) | 2023-04-25 |
| JP7186771B2 (ja) | 2022-12-09 |
| JP2021500540A (ja) | 2021-01-07 |
| WO2019081253A1 (fr) | 2019-05-02 |
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