Balance spring stud-holder with secure assembly

Patent metadata

Field	Value
Publication number	US-10126712-B2
Application number	US-201615355886-A
Country	US
Kind code	B2
Filing date	Nov 18, 2016
Priority date	Dec 11, 2015
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

The present invention concerns an assembly for holding or supporting a timepiece balance spring, comprising a balance spring stud and a balance cock on which is fixed a balance spring stud-holder, wherein said stud-holder comprises a holding means provided with a housing for housing the balance spring stud therein and a gripping means, at least said gripping means being movable with respect to the holding means in order to lock the balance spring stud inside its housing.

First claim

What is claimed is:

1. An assembly for holding or supporting a timepiece balance spring, comprising a balance spring stud and a balance cock on which is fixed a balance spring stud-holder, comprising:
a holding means provided with a housing for housing the balance spring stud therein and a gripping means, at least said gripping means being movable with respect to the holding means in order to lock the balance spring stud inside the housing,
wherein the holding means and the gripping means comprise an annular piece arranged to be rotatably mounted on a protuberance, and
wherein the holding means comprise a holding ring comprising a resilient arm extending from said ring and forming therewith a housing for accommodating the balance spring stud.

2. The assembly according to claim 1 , wherein the gripping means comprise a gripping ring comprising a frame on which a stud is arranged, the frame and the stud being arranged such that the rotation of the gripping ring with respect to the holding ring results in the appearance of a stress exerted by said stud on said resilient arm in order to lock the balance spring stud assembly.

3. The assembly according to claim 2 , wherein the frame comprises at least two radially extending arms, connected to each other by a crosspiece, the at least two arms being spaced apart so as to allow the balance spring stud to be set in place and locked without the risk of any contact with said arms.

4. The assembly according to claim 3 , wherein the gripping ring and the holding ring each comprise a radially extending positioning extension piece configured to be gripped to rotate the gripping ring and the holding ring, and the positioning extension piece of the gripping ring and of the arms of the frame form only a single piece.

5. The assembly according to claim 1 , wherein the gripping means comprise a gripping ring comprising a frame on which is arranged a structure provided with a groove, the groove being arranged such that the resilient arm can be inserted therein so that the rotation of said locking ring with respect to the holding ring causes a deformation of said arm in order to lock the balance spring stud assembly.

6. The assembly according to claim 1 , wherein the gripping ring and the holding ring each comprise a radially extending positioning extension piece configured to be gripped to rotate the gripping ring and the holding ring.

7. The assembly according to claim 6 , wherein the positioning extension pieces of the gripping ring and of the holding ring are arranged to face each other when the balance spring stud is locked to allow simultaneously gripping thereof to perform an angular adjustment of the position of the balance spring stud with respect to the balance cock.

8. A timepiece movement comprising a main plate on which is mounted an energy source supplying energy to the transmission gear trains, said gear trains cooperating with an escapement system via an escape wheel whose rotation is regulated by a pallet lever of the escapement system whose pulses are provided by a sprung balance, said balance spring being mounted on a holding assembly according to claim 1 .

9. The timepiece movement according to claim 8 , wherein the gripping means comprise a gripping ring comprising a frame on which a stud is arranged, the frame and the stud being arranged such that the rotation of the gripping ring with respect to the holding ring results in the appearance of a stress exerted by said stud on said resilient arm in order to lock the balance spring stud assembly.

10. The timepiece movement according to claim 8 , wherein the gripping means comprise a gripping ring comprising a frame on which is arranged a structure provided with a groove, the groove being arranged such that the resilient arm can be inserted therein so that the rotation of said locking ring with respect to the holding ring causes a deformation of said arm in order to lock the balance spring stud assembly.

Assignees

• Eta Sa Mft Horlogere Suisse
• Eta Sa Mft Horlogere Suisse

Inventors

• Strahm Florent
• Villar Ivan
• Kaelin Laurent
• Conus Thierry

Classifications

• G04B17/063

  Balance construction (balances with frequency adjustment screw G04B18/006; balances with temperature compensation G04B17/222; balancing devices G04B17/28) · CPC title

• G04B15/14

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title

• G04B17/325 Primary

  for fastening the hairspring in a fixed position, e.g. using a block · CPC title

• G04B17/32 Primary

  Component parts or constructional details, e.g. collet, stud {, virole or piton} · CPC title

• G04B18/06

  by setting the collet or the stud of a hairspring · CPC title