Horology pawl system

Patent metadata

Field	Value
Publication number	US-10890877-B2
Application number	US-201815894133-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Feb 13, 2017
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A pawl system ( 1 ) for a wheel ( 2 ) of a drivetrain for winding a horology barrel ( 3 ), including (i) a pawl ( 10 ) having at least one tooth ( 1 a ) intended to collaborate with a toothset ( 2 a ) of the wheel ( 2 ); and (ii) an element ( 6 ) for activating and deactivating the pawl, which is arranged so that, when it is in a first configuration, the at least one tooth ( 1 a ) of the pawl collaborates with the toothset ( 2 a ) directly or indirectly, notably under the effect of a return force returning the at least one tooth ( 1 a ) of the pawl against the toothset ( 2 a ), and, when the activation and deactivation element is in a second configuration, the at least one tooth ( 1 a ) of the pawl does not collaborate with the toothset ( 2 a ) or a return force returning the at least one tooth ( 1 a ) of the pawl against the toothset ( 2 a ) is reduced.

First claim

The invention claimed is:

1. A horology movement comprising:
an automatic movement,
a drivetrain configured for winding a horology barrel, and
a pawl system for a wheel of the drivetrain configured for winding the horology barrel, the pawl system comprising:
a pawl having at least one tooth intended to collaborate with a toothset of the wheel; and
an element for activating and deactivating the pawl;

the activation and deactivation element being movable between a first, activation configuration and a second, deactivation configuration, and the activation and deactivation element being arranged so that, when the activation and deactivation element is in the first configuration, the at least one tooth of the pawl collaborates with the toothset directly or indirectly, and, when the activation and deactivation element is in the second configuration, the at least one tooth of the pawl does not collaborate with the toothset or a return force returning the at least one tooth of the pawl against the toothset is reduced,
wherein, when the horology movement is assembled in an operating configuration, the activation and deactivation element is in the second configuration.

2. The horology movement as claimed in claim 1 , wherein the wheel is a ratchet.

3. The horology movement as claimed in claim 1 , wherein the pawl comprises an assembly element for assembly to a frame of a movement, and wherein the pawl comprises the at least one tooth some distance away from the assembly element.

4. The horology movement as claimed in claim 3 , wherein the pawl comprises a flexible portion between the assembly element and the at least one tooth.

5. The horology movement as claimed in claim 3 , wherein the assembly element is an element for fixing the pawl to a frame of a movement.

6. The horology movement as claimed in claim 3 , wherein the pawl comprises a rigid body, wherein the assembly element is a pivot element and wherein the pawl comprises a return spring for returning the at least one tooth of the pawl against the toothset.

7. The horology movement as claimed in claim 6 , wherein the spring is formed as one with the rigid body or is an attached spring bearing directly or indirectly against the rigid body.

8. The horology movement as claimed in claim 3 , wherein the assembly element is for assembly to a first end of the pawl, and wherein the at least one tooth is at a second end of the pawl.

9. The horology movement as claimed in claim 1 , wherein the activation and deactivation element is an assembly means enabling assembly of the automatic movement in the horology movement.

10. The horology movement as claimed in claim 9 , wherein the activation and deactivation element has a portion or a face parallel or substantially parallel to a cross section thereof, intended to come to bear against the pawl in the second configuration.

11. The horology movement as claimed in claim 9 , wherein the activation and deactivation element is a means of assembly of the automatic movement onto a movement-blank.

12. The horology movement as claimed in claim 11 , wherein the mainspring is kept under tension under the effect of the automatic movement in the second configuration of the activation and deactivation element.

13. The horology movement as claimed in claim 11 , wherein the automatic winding module is a module fitted with reversing wheels.

14. The horology movement as claimed in claim 1 , wherein the activation and deactivation element is an eccentric.

15. The horology movement as claimed in claim 1 , wherein the pawl comprises an assembly element for assembly to a frame of the movement, and wherein the pawl comprises the at least one tooth spaced away from the assembly element.

16. A timepiece comprising a horology movement as claimed in claim 1 .

17. The timepiece as claimed in claim 16 , wherein the activation and deactivation element is a means of assembly of the timepiece.

18. A method for configuring a horology movement as claimed in claim 1 , the method comprising at least one selected from the group consisting of:
acting on the pawl activation and deactivation element so as to place the pawl activation and deactivation element in the first configuration in which the at least one tooth of the pawl collaborates directly or indirectly with the toothset, and
acting on the pawl activation and deactivation element so as to place the pawl activation and deactivation element in the second configuration in which the at least one tooth of the pawl does not collaborate with the toothset or in which the return force returning the at least one tooth of the pawl against the toothset is reduced.

19. The horology movement as claimed in claim 1 , wherein, when the activation and deactivation element is in the first configuration, the at least one tooth of the pawl collaborates with the toothset under the effect of the return force returning the at least one tooth of the pawl against the toothset.

20. The horology movement as claimed in claim 1 , wherein the activation and deactivation element is configured to contribute to the assembly of a device in the horology movement.

21. The horology movement as claimed in claim 20 , wherein the device is the automatic movement.

Assignees

• Rolex Sa

Inventors

• Guffond Eric
• Miserez Thierry

Classifications

• G04B11/00

  Click devices; Stop clicks; Clutches {(mechanisms for winding up by hand G04B3/00; automatic winding up G04B5/00; clutches in general, class 111)} · CPC title

• G04B11/026 Primary

  with clamping member · CPC title

• G04B5/18

  Supports, suspensions or guide arrangements, for oscillating weights {(transmission of the movement of the winding up weight to the mainspring G04B5/04, G04B5/10; support of the driving weight by protecting means which prevent overwinding, e.g. by interposing of a glide clutch G04B5/24; bearings in general G04B33/00)} · CPC title

• G04B5/20

  by movements of other objects, e.g. by opening a hand-bag, by opening a case, by opening a door; Winding up by wind power · CPC title

• G04B5/00

  Automatic winding up {(normal winding up by hand or mechanically G04B3/00; automatic winding in combination with hand winding G04B7/00; electrical winding of mechanical clockworks G04C1/00; advertising by making use of vibrations or shocks of land vehicles G09F21/045)} · CPC title