Timepiece transmission coupling

Patent metadata

Field	Value
Publication number	US-11409243-B2
Application number	US-201816027652-A
Country	US
Kind code	B2
Filing date	Jul 5, 2018
Priority date	Jul 6, 2017
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

A transmission coupling ( 100 ), especially a timepiece transmission coupling, for the mechanical linkage of at least one first part ( 2 A) of a first shaft at least movable in rotation about a first axis (A 2 ) to at least one second part ( 3 A) of a second shaft at least movable in rotation about a second axis (A 3 ), the first and second axes being parallel or substantially parallel, the transmission coupling including the at least one first part ( 2 A), the at least one second part ( 3 A), and at least a first elastic return system ( 15, 16; 18; 16 a ′- 16 d′; 111 a, 111 b; 221, 222, 223, 224 ) arranged so as to limit or cancel out the play between the at least one first part ( 2 A) and the at least one second part ( 3 A), and connecting the at least one first part ( 2 A) and the at least one second part ( 3 A).

First claim

The invention claimed is:

1. A wristwatch timepiece, comprising:
a timepiece transmission coupling for the mechanical linkage of at least one first part of a first shaft at least movable in rotation about a first axis to at least one second part of a second shaft at least movable in rotation about a second axis, the first and second axes being parallel or substantially parallel, the transmission coupling comprising:
the at least one first part of the first shaft,
the at least one second part of the second shaft, and
at least a first elastic return system,

the at least one first elastic return system being arranged so as to limit or cancel out the play between the at least one first part of the first shaft and the at least one second part of the second shaft, and
the at least one first elastic return system mechanically connecting the at least one first part of the first shaft and the at least one second part of the second shaft, said at least one elastic return system being configured to urge the first shaft or the second shaft transversely to the axes of the first shaft and the second shaft, said at least one elastic return system including at least one flexible portion that bends around an axis that extends substantially parallel to the axes of the first and second shaft.

2. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the transmission coupling comprises a frame on which is secured the at least one first elastic return system.

3. The wristwatch timepiece having the transmission coupling as claimed in claim 2 , wherein the frame comprises the at least one first part of the first shaft and at least one cam surface, designed to cooperate with at least one peg provided on the second shaft, the first elastic return system of the frame comprising at least one elastic blade provided on the at least one cam surface.

4. The wristwatch timepiece having the transmission coupling as claimed in claim 3 , wherein the frame comprises N cam surfaces and/or N elastic blades arranged in a symmetry of rotation of order N, with N being an integer greater than or equal to 2, and/or wherein the cam surface or each of the cam surfaces comprises a friction surface.

5. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the transmission coupling comprises a second elastic return system arranged so as to limit or cancel out the play between the at least one first part of the first shaft and the at least one second part of the second shaft, the second return system mechanically connecting the at least one first part of the first shaft and the at least one second part of the second shaft.

6. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the transmission coupling comprises a first sliding element of a first slideway and/or wherein the transmission coupling comprises a second sliding element of a second slideway.

7. The wristwatch timepiece having the transmission coupling as claimed in claim 6 , wherein the first sliding element comprises one or several grooves, and/or wherein the second sliding element comprises one or several grooves, and/or wherein the first sliding element comprises at least one friction surface, and/or wherein the second sliding element comprises at least one friction surface.

8. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the transmission coupling comprises a first sliding element of a first slideway and a second sliding element of a second slideway, and wherein the first sliding element and the second sliding element extend, in a direction of the first axis or the second axis or in a direction perpendicular to a third axis of the first slideway and to a fourth axis of the second slideway, overlapping on axial portions.

9. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the at least one first part of the first shaft and the at least one second part of the second shaft extend in a direction of the first axis or in a direction of the second axis, superposed on axial portions.

10. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the at least one first elastic return system comprises one or more first elastic blades and/or wherein the second elastic return system comprises one or more second elastic blades.

11. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the first elastic return system comprises at least one elastically deformable arm and/or wherein a second elastic return system comprises at least one elastically deformable arm.

12. The wristwatch timepiece having the transmission coupling as claimed in claim 11 , wherein the transmission coupling comprises a first receiving element and the at least one first elastic return system is arranged so as to be deformed in order to position the first receiving element along the first axis and/or wherein the transmission coupling comprises a second receiving element and the second elastic return system is arranged so as to be deformed in order to position the second receiving element along the second axis.

13. The wristwatch timepiece having the transmission coupling as claimed in claim 1 , wherein the at least one first part of the first shaft comprises a second sliding element of the first slideway, and/or wherein the at least one second part of the second shaft comprises a second sliding element of the second slideway.

14. The wristwatch timepiece of claim 1 , further comprising:
a geartrain and a display element, the first shaft being in engagement with the gear train and the second shaft being in engagement with the display element.

15. The wristwatch timepiece of claim 1 , wherein the transmission coupling further comprises a second elastic return system arranged so as to limit or cancel out the play between the at least one first part of the first shaft and at least one second part of the second shaft, the second return system mechanically connecting the at least one first part of the first shaft and the at least one second part of the second shaft.

16. The wristwatch timepiece of claim 1 , wherein:
the at least one elastic return system is configured to independently move both the first shaft and the second shaft transversely to the axes of the first shaft and the second shaft.

17. The wristwatch timepiece of claim 16 , wherein:
wherein the elastic return system is configured to independently move both the first conformation and the second conformation transversely to the axes of the first shaft and the second shaft.

18. A wristwatch timepiece, comprising:
a timepiece mechanical linkage element for a transmission coupling, the mechanical linkage element being designed to transmit a movement of rotation from a first shaft to a second shaft, the second shaft being off-center with respect to the first shaft such that an axis of said first shaft and an axis of said second shaft are offset during operation with a spacing between the axes of the first and second shafts, the linkage element comprising:
a first conformation to receive the first shaft;
a second conformation to receive the second shaft; and
at least a first elastic return system arranged so as to cooperate with the first or the second receiving conformation, wherein the elastic return system is configured to urge the first conformation or the second conformation transversely to the axes of the first shaft and the second shaft, said elastic return system includi

Assignees

• Rolex Sa

Inventors

• Behrend Raoul
• Fracheboud Blaise
• Zbylut Ludovic

Classifications

• G04B13/021 Primary

  elastic fitting with a spindle, axis or shaft · CPC title