Quick correction device with connecting rod for timepiece movement

Abstract

The invention relates to a correction device (1) for an indication provided by a display mechanism for a watch movement equipped with a display mechanism comprising an indicator wheel (2), the actuation of the indicator wheel (2) allowing the display indication to be modified, the correction device (1) comprising a movable joint (10) including a connecting rod (3) movable between two positions, a correction position in which the joint (10) cooperates with the indicator wheel (2) to rotate it, and a rest position in which the joint (10) is away from the indicator wheel (2).

Description

Scope of the invention

[0001] The invention relates to a quick-correction connecting rod device for a watch movement comprising a display mechanism.

[0002] The invention also relates to a clockwork movement comprising such a correction device.

[0003] The invention relates to the field of watchmaking, and more particularly to watch parts comprising a display mechanism. Background of the invention

[0004] This invention relates to watches that require a rapid correction device (date, day, month, or other) for certain functions, particularly display functions such as a calendar (simple, annual, perpetual, day / date, or other), or indicators for moon phase, tide, AM / PM display, or others. A specific example of an annual calendar mechanism is described in patent EP1666991 B1 filed by ETA SA.

[0005] To correct the month, the user must usually perform a correction using the date. In the worst-case scenario, this can be a lengthy and tedious process. It may be necessary to perform a correction for thirty days. Similarly, if the user makes a mistake during the correction, the procedure must be repeated. Overusing the date correction mechanism could lead to excessive use and potentially cause malfunctions.

[0006] To actuate an indicator wheel, correction devices often incorporate rocker arms, which are essential components in watchmaking mechanisms. These rocker arms allow a mechanism to be switched between several different modes, generally between two distinct positions. One of these positions drives the rotation of the indicator wheel. A watch rocker arm is often accompanied by a return spring to ensure correct transmission of movement, or positioning, as the case may be.

[0007] Generally, the correction device consists of a gear train made up of one or more components, and is operated from the winding stem.

[0008] However, such a correction device takes up space in the movement and often requires many components, especially when the indicator wheel is far from the winding stem.

[0009] A known alternative is to use pushers integrated into the watch case. However, this alternative is often relatively expensive and can be a source of problems with the watch case's water resistance. Summary of the invention

[0010] The present invention aims to resolve the aforementioned drawbacks of the prior art, and aims to allow the user to quickly correct a display mechanism, and more particularly a date mechanism.

[0011] To this end, the invention relates to a device for correcting an indication provided by a display mechanism for a watch movement equipped with a display mechanism comprising an indicator wheel having a cannon, the actuation of the indicator wheel allowing the display indication to be modified.

[0012] The correction device is remarkable in that it includes a movable joint around a pivot, the joint being equipped with a movable connecting rod between two positions, a correction position in which the joint cooperates with the indicator wheel to rotate it step by step, and a rest position in which the joint is away from the indicator wheel.

[0013] Thus, this correction device offers a new type of architecture with innovative components, in particular the use of a connecting rod.

[0014] Thanks to the invention, the correction device has a reduced footprint and is easier to integrate into a watch movement, as it comprises fewer components, combined with efficient operation.

[0015] According to a particular embodiment of the invention, the joint comprises a ratchet mounted rotatably at a first end of the connecting rod.

[0016] According to a particular embodiment of the invention, the ratchet is further mobile around a pivot.

[0017] According to a particular embodiment of the invention, the ratchet includes a beak configured to insert at least partially into the teeth of the indicator wheel in order to rotate it when the joint is in the correction position.

[0018] According to a particular embodiment of the invention, the correction device comprises a cam-driven mobile adapted to cooperate with the connecting rod so as to push it from the rest position to the correction position, when the cam-driven mobile is actuated.

[0019] According to a particular embodiment of the invention, the cam-driven mobile is provided with teeth configured to come into contact with a beak arranged at a second end of the connecting rod.

[0020] According to a particular embodiment of the invention, the correction device comprises a jump spring exerting a restoring force on the connecting rod, to return it from the correction position to the rest position.

[0021] According to a particular embodiment of the invention, the correction device includes a jumper to position and prevent the indicator wheel from turning in case of shocks, when it is not actuated by the movable joint, the jumper being able to be inserted into the teeth of the indicator wheel to position it.

[0022] According to a particular embodiment of the invention, the correction device comprises a connecting rod spring exerting a restoring force on the connecting rod and the pawl to keep them away from the indicator wheel, in the rest position.

[0023] According to a particular embodiment of the invention, the correction device extends substantially in the same plane.

[0024] According to a particular embodiment of the invention, the display mechanism is a moon phase display or a date display or a day display or a month display or a tide display or a time zone display.

[0025] The invention also relates to a clockwork movement comprising such a correction device. Brief description of the drawings

[0026] Other features and advantages of the invention will become apparent upon reading the detailed description that follows, with reference to the attached drawings, where: there figure 1 represents, in schematic form, a perspective view of one embodiment of a correction device according to the invention, the figure 2 represents, in schematic form, a bottom view of the correction device of the figure 1 , there figure 3 represents schematically a top view of the correction device of the figure 1, when the joint is in the resting position away from the indicator wheel, the figure 4 represents schematically a top view of the correction device of the figure 1 , when the joint is in the corrected position cooperating with the indicator wheel, and the figure 5 represents a part of a clockwork movement comprising the correction device. Detailed description of preferred embodiments

[0027] The invention relates to the field of watchmaking mechanisms, and more particularly to movement control and transmission mechanisms. It finds a preferential application in the correction and updating of display mechanisms in a watch movement of a timepiece.

[0028] The invention relates more particularly to a correction device 1 for an indication provided by a display mechanism of a clockwork movement. Preferably, the correction device 1 extends substantially in the same plane.

[0029] On the figures 1 to 4 The display mechanism includes an indicator wheel 2 with a barrel 19. A hand, not shown in the figures, is mounted on the barrel 19, for example, to display the date. The indicator wheel 2 has peripheral teeth 17 that allow it to rotate.

[0030] The indicator wheel 2 is mechanically linked to the needle; actuation of the indicator wheel 2 allows the display indication to be changed.

[0031] Preferably, the modification is carried out step by step. Thus, for each rotation of one notch of the indicator wheel 2, the display is modified by one unit.

[0032] The correction device 1 includes a jumper 18 to position the indicator wheel 2 when not operated and to prevent it from turning in case of shocks.

[0033] The jumper 5 has an inclined section 18 at one end and is rotatably mounted around a pivot arranged at the other end of the jumper 5. The pivot is, for example, formed by a stud, a pin, or a screw with a bearing surface. The jumper 5 includes a hole 13 for the pivot.

[0034] The correction device 1 includes a jump spring 6 arranged to hold the jumper 5 against the indicator wheel 2. The jump spring 6 is here a curved blade, one end of which rests against the jumper 5 to push it against the indicator wheel 2. A second end of the blade is connected to a heel 9 having fixings 24 so that it can be mounted on a plate or bridge of the watch movement, in particular by means of one or more studs and / or one or more screws.

[0035] To actuate the indicator wheel 2, the correction device 1 includes a movable joint 10 adapted to cooperate with the indicator wheel 2, to rotate it.

[0036] According to the invention, the joint 10 comprises a connecting rod 3 movable between two positions, a correction position in which the joint 10 cooperates with the indicator wheel 2 to rotate it, and a rest position in which the joint 10 is away from the indicator wheel 2.

[0037] In the rest position, the joint 10 cannot cause its rotation, and the indicator wheel 2 does not turn.

[0038] The connecting rod 3 here includes an elongated body, for example rectangular, equipped with two studs 14, 15 arranged on one face of the connecting rod 3, one at each end.

[0039] The joint 10 includes a ratchet 8 rotatably mounted on the stud 15 of the first end of the connecting rod 3, so as to be able to rotate around the stud 15.

[0040] The pawl 8 is also mounted to rotate around a pivot, preferably fixed relative to the movement plate. To this end, the pawl 8 has two holes: a first hole for the stud 15, and a second hole 12 for a pivot around which the pawl 8 can rotate. The pivot is, for example, formed by a stud or a screw with a bearing surface inserted into the second hole 12.

[0041] The ratchet 8 also includes a beak 16 capable of engaging with the teeth 17 of the indicator wheel 2 to rotate it. The beak is oriented towards the indicator wheel 2.

[0042] When connecting rod 3 moves from its rest position to its correction position, it undergoes a substantially linear, or even rectilinear, movement. The pawl 8 is pushed by connecting rod 3 and rotates both around the pin 15 of connecting rod 3 and around the pivot, which is preferably fixed relative to the clockwork mechanism. Thus, the pawl 8's beak 16 is lowered to engage with the teeth 17 of the indicator wheel 2, causing it to rotate when connecting rod 3 is in its correction position.

[0043] To move the connecting rod 3, the correction device 1 includes a cam 4 cooperating with the connecting rod 3, so as to push it from the rest position to the correction position when the cam 4 is actuated. The cam 4 has teeth 21 configured to contact a beak 22, arranged at a second end of the connecting rod 3. The cam 4 is (doesn't this imply an assembly?) rotatably positioned at the rear of the connecting rod 3.

[0044] The correction device 1 includes a connecting rod spring 7 exerting a restoring force on the connecting rod 10 to return the connecting rod 3 from the correction position to the rest position. The connecting rod spring 7 also includes a curved flexible blade connected at one end to a second heel 11, and bears against the inner side of the connecting rod 3's stud 14 to push the connecting rod 10 back to its second rest position. The second heel 11 includes fasteners 23 for attaching the second heel 11 to the moving part.

[0045] The stud 14 can also be used for guiding the connecting rod 3, the stud 14 being for example movable in an oblong operated in an additional plate, not shown in the figures.

[0046] The correction device 1 is, for example, integrated into a watch movement 10, for example to correct a date display. The correction is made by the user using a winding stem, not shown in the figures.

[0047] The longitudinal movement of the winding stem directly or indirectly causes the movement of a correction link 25 into a distinct position (generally the intermediate position of a three-position mechanism), which engages a sliding shunt 29 allowing the cam-driven mobile 4 to be actuated.

[0048] By turning the winding stem clockwise, the corrector gear 25 rotates counterclockwise, the sliding sleeve 29 rotates clockwise, and the cam 4 rotates counterclockwise. Thus, the cam 4 actuates the movement of the connecting rod 3 and the pawl 8 against the indicator wheel 2 according to the process described previously. The indicator wheel 2 is therefore corrected incrementally each time a tooth of the cam pushes the connecting rod 3.

[0049] Of course, the corrective device according to the invention is not limited to the embodiments that have just been described and various simple modifications and variants can be envisaged by a person skilled in the art without going out of the scope of the invention as defined by the annexed claims.

Claims

1. Correction device (1) for an indication provided by a display mechanism for a clock movement equipped with a display mechanism comprising an indicator wheel (2), the actuation of the indicator wheel (2) allowing the display indication to be modified, the correction device (1) comprising a movable joint (10), characterized in that the joint (10) includes a connecting rod (3) movable between two positions, a correction position in which the joint (10) cooperates with the indicator wheel (2) to rotate it, and a rest position in which the joint (10) is away from the indicator wheel (2).

2. Correction device according to claim 1, characterized in that the joint (10) includes a ratchet (8) rotatably mounted at one end of the connecting rod (3).

3. Correction device according to claim 2, characterized in that the ratchet (8) is also movable (10) around a pivot (12).

4. Correction device according to claim 2 or 3, characterized in that the ratchet (8) includes a beak (16) configured to fit at least partially into the teeth (17) of the indicator wheel (2) in order to rotate it, when the joint (10) is in the correction position.

5. A correction device according to any one of the preceding claims, characterized in that It includes a cam-driven mobile (4) capable of cooperating with the connecting rod (3) so as to push it from the rest position to the correction position, when the cam-driven mobile (4) is actuated.

6. Correction device according to claim 5, characterized in that the cam-driven mobile (4) is provided with teeth (21) configured to come into contact with a beak (22) arranged at a second end of the connecting rod (3).

7. Correction device according to any one of claims 2 to 4, characterized in thatIt includes a connecting rod spring (7) exerting a restoring force on the connecting rod (3), to return it from the correction position to the rest position.

8. A correction device according to any one of the preceding claims, characterized in that It includes a jumper (5) for positioning and preventing the indicator wheel (2) from turning in case of shocks, when it is not actuated by the movable joint (10), the jumper (5) being able to fit into the teeth (17) of the indicator wheel (2) to lock it.

9. Correction device according to claim 8, characterized in that It includes a jump spring (6) exerting a restoring force on the jump (5) to hold it against the indicator wheel (2).

10. A correction device according to any one of the preceding claims, characterized in that It extends substantially in the same plane.

11. A corrective device according to any one of the preceding claims, characterized in that the display mechanism is a moon phase display or a date display or a day display or a month display or a tide display or a time zone display.

12. A watch movement comprising a device for correcting an indication provided by a display mechanism according to any one of the preceding claims.

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