Push-piece winding device for watches

Patent metadata

Field	Value
Publication number	US-10915067-B2
Application number	US-201815920791-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Mar 17, 2017
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A winding device on a structure of a movement or watch case, including a telescopic push-piece, independent of the control stem, driving a rack for winding a barrel, and including, between a pipe fixed to the case and an operating head, first elastic return device tending to move the head away from the pipe, this head being capable of occupying an angular, longitudinal locking position corresponding to a rest position, or an angular position of freedom allowing axial mobility, or a stop position wherein it has one degree of freedom, this rack, which is movable against second elastic return device, cooperates with a winding wheel set meshing with an intermediate rack actuated by a return spring of the second elastic return device.

First claim

What is claimed is:

1. A winding device arranged to be secured to a structure of a watch comprising a case containing at least one barrel, a stem, movable with respect to said case, for controlling at least the hand-setting function, said winding device comprising a retractable bayonet push-piece which is telescopically extendable, comprising, between a pipe arranged to be fixed to said case and a user-actuatable head which carries a control member, first elastic return means tending to move said head away from said pipe, said head being movable in translation with respect to the longitudinal axis of said pipe, between two extreme end positions, which are a stop position, wherein said head is as close as possible to said case, and wherein said stop position said head has one rotational degree of freedom with respect to the longitudinal axis of said pipe, and an activated position which is a position of maximum elongation, accessible to the user, and wherein said head is indexed in rotation with respect to said case in an indexed angular position, said head being capable of occupying, between said two stop and activated positions, a rest position wherein said head is capable of being immobilised longitudinally with respect to said pipe, in at least one angular locking position which is different from said indexed angular position, said push-piece, which is independent of said stem, being dedicated exclusively to the winding function and being arranged to indirectly drive at least the drum of said at least one barrel or a ratchet-wheel in order to wind said at least one barrel, said control member being movable linearly and arranged, upon a user action, for driving at least one movable rack against second elastic return means, wherein said at least one rack is slidably mounted and guided by guide means or by at least two supports, and cooperates with a winding wheel set which meshes with an intermediate rack actuated by at least one return spring comprised in said second elastic return means.

2. The winding device according to claim 1 , wherein said winding wheel set meshes with a sliding intermediate wheel which, depending upon its direction of rotation, meshes or does not mesh with said ratchet-wheel, or with a transmission wheel meshing with said ratchet-wheel, or with the drum of said barrel, for winding said barrel as a result of actuation of said push-piece.

3. The winding device according to claim 2 , wherein said winding wheel set meshes with a sliding intermediate wheel via at least one reverser pinion.

4. The winding device according to claim 2 , wherein said winding device comprises a third elastic return means, or a click, cooperating with said transmission wheel or with said ratchet-wheel.

5. The winding device according to claim 1 , wherein said rack is linearly movable, and wherein said head is movable on a first linear travel, which is parallel to a second linear travel on which said rack is movable.

6. The winding device according to claim 1 , wherein said winding device forms a module independent of said stem and which is arranged to be fixed to said case.

7. The winding device according to claim 1 , wherein said pipe comprises a first bore for guiding an arbor which is fixed to said head and which forms said control device for pushing a rack or a moving timepiece component.

8. The winding device according to claim 1 , wherein said push-piece forms an independent module.

9. The winding device according to claim 1 , wherein said pipe comprises, adjacent to a thrust collar, a cylindrical shoulder on which slides a bore of said head and inside which is provided at least one longitudinal slot parallel to its axis and inside which slides a lug integral with a front end of said head, said at least one longitudinal slot leading, in proximity to said collar, into a recess forming a bayonet profile capable of receiving said lug upon suitable rotation of said head with respect to said pipe, to form an axial stop for said head with respect to said pipe.

10. The winding device according to claim 9 , wherein said pipe comprises a first chamber aligned with a second chamber comprised in said head for reception of a spring tending to move said head away from said pipe, said spring forming said first elastic return means, and wherein said recess comprises a housing arranged to house said lug in a rest position, and which is separated from said longitudinal slot by a peripheral stop preventing any rotation of said head, when said lug is housed inside said housing in the absence of axial movement by said head.

11. The winding device according to claim 1 , wherein said pipe comprises a first chamber aligned with a second chamber comprised in said head for reception of a spring tending to move said head away from said pipe, said spring forming said first elastic return means.

12. A timepiece movement including a structure on which is fixed at least one winding device according to claim 1 .

13. A watch comprising said case containing said at least one barrel, and said stem, movable with respect to said case, for controlling at least the time-setting function, said watch comprising said structure to which is fixed said winding device according to claim 1 , and said case comprising at least one chamber for housing said push-piece, which is remote from said stem.

14. The watch according to claim 13 , wherein said watch is a mechanical watch.

Assignees

• Winston Harry Sa

Inventors

• Buehler Johnny
• Monferrer Bernat

Classifications

• G04B3/001 Primary

  by push button (crown combined with push button G04B3/046; construction of push button G04B3/048; waterproof push buttons G04B37/106) · CPC title

• G04B3/045

  Storing the operating element, also bringing it out of storage · CPC title

• G04B3/048

  Operation exclusively by axial movement of a push-button, e.g. for chronographs (winding up by push button G04B3/001; hermetically sealed push button G04B37/106) · CPC title

• G04B3/046 Primary

  Operation by rotation and axial movement with extra function of axial shift of operating element, e.g. crown combined with push button (winding up by push button G04B3/001) · CPC title

• G04B3/041 Primary

  Construction of crowns for rotating movement; connection with the winding stem; winding stems · CPC title