Timepiece oscillator structure with a divisible element

Patent metadata

Field	Value
Publication number	US-2019011887-A1
Application number	US-201816027799-A
Country	US
Kind code	A1
Filing date	Jul 5, 2018
Priority date	Jul 7, 2017
Publication date	Jan 10, 2019
Grant date	—

Abstract

A timepiece oscillator structure includes at least one divisible unit, which includes at least one component which includes at least one flexible blade or at least one blade with necks, joining two main units, each more rigid than the flexible blade or blade with necks, where the divisible unit includes at least one gripping unit adjacent to at least one main unit to which it is connected by at least one divisible linkage which is designed in order to make possible the detachment of this gripping unit from the component when the component is fixed, with at least the particular main unit which is adjacent to the gripping unit, to a more rigid external element than the flexible blade or than the necks of the blade with necks.

First claim

1 . A timepiece oscillator structure comprising:
at least one divisible unit, which comprises at least one component which comprises at least one flexible blade or at least one blade with necks, joining two main units, each more rigid than said flexible blade or blade with necks, where said divisible unit comprises at least one gripping unit which is designed to be adjacent to at least one said main unit to which it is connected by at least one divisible linkage which is designed in order to make possible the detachment of said protection zone from said component when said component is fixed, by at least said particular main unit which is designed to be adjacent to said gripping unit, to a more rigid external element than said flexible blade or than the necks of said blade with necks, wherein the same gripping unit is adjacent to the main units situated on both sides of the same flexible blade or blade with necks, in order to protect said flexible blade or blade with necks.

2 . The structure according to claim 1 , wherein said divisible linkage comprises a zone of a smaller section than that of said main unit and than said gripping unit which are adjacent thereto, and/or comprises at least one bridge, and/or comprises at least one incipient break produced in the thickness of the material.

3 . The structure according to claim 1 , wherein each said main unit is adjacent to said gripping unit to which it is connected by said divisible linkage.

4 . The structure according to claim 1 , wherein at least one said main unit forms a free inertial mass, and is designed to be fixed to another free inertial mass of another said divisible unit.

5 . The structure according to claim 1 , wherein at least one said main unit comprises at least one assembly surface for rigid fixing thereof to at least one said external element.

6 . The structure according to claim 5 , wherein each said main unit comprises at least one assembly surface for rigid fixing thereof to at least one said external element.

7 . The structure according to claim 1 , wherein at least one said main unit forms a free inertial mass and is devoid of any linkage with said external element.

8 . The structure according to claim 1 , wherein said divisible unit comprises a single said gripping unit.

9 . The structure according to claim 1 , wherein at least one said flexible blade or blade with necks is prestressed in a multistable state, as long as said divisible linkage is intact, and as long as each said gripping unit is connected to said component.

10 . The structure according to claim 1 , wherein said divisible unit is planar and is made of a micromachinable material, or made of silicon and silicon oxide, or made of DLC, or made of an at least partially amorphous material.

11 . The structure according to claim 1 , wherein said divisible unit extends over a single level corresponding to the thickness of the thickest said flexible blade or blade with necks which it comprises.

12 . The structure according to claim 1 , wherein said divisible unit extends over a plurality of levels, each corresponding to the thickness of the thickest flexible blade or blade with necks which it comprises.

13 . The structure according to claim 12 , wherein said divisible unit comprises, over various levels, said flexible blades or blades with necks which intersect, in projection on a plane parallel to the plane of each of said components.

14 . The structure according to claim 1 , wherein said divisible unit is monobloc and non-dismantlable.

15 . The structure according to claim 1 , further comprising a plurality of components fixed one on the other, at least one component of which is a constituent of said divisible unit.

16 . The structure according to claim 15 , wherein said structure comprises a plurality of components which are stacked one on the other, at least one said component of which is a constituent of said divisible unit.

17 . The structure according to claim 15 , wherein said structure comprises at least two components which are stacked one on the other, each being a constituent of said divisible unit comprising one said flexible blade or blade with necks, and wherein said flexible blades or blades with necks intersect, in projection on a plane parallel to the plane of each of said components.

18 . The structure according to claim 16 , wherein all of said components which said structure comprises form a stack subjected to a clamping force by a linkage clamped along the direction of said stack by connection means which comprises at least one assembled rivet and/or one screw-nut assembly and/or at least one component fixed by clamping.

19 . The structure according to claim 17 , wherein all said components which said structure comprises form a stack where they are joined one to another by adhesive.

20 . The structure according to claim 1 , wherein said structure comprises at least one said component comprising a traversing housing for passage and fixing of a spindle or a pin or a screw, said traversing housing comprising a plurality of elastic centring springs and a plurality of limit stops for limitation of radial travel.

21 . The structure according to claim 1 , wherein each said divisible unit is broken at the level of each said divisible linkage.

22 . A timepiece oscillator mechanism comprising at least one of said structure according to claim 1 .

23 . A timepiece movement comprising at least one of said timepiece oscillator mechanism according to claim 22 .

24 . A watch comprising said timepiece movement according to claim 23 .

25 . A method for producing a timepiece mechanism comprising at least one component, which comprises at least one flexible blade or blade with necks joining two main units, each more rigid than said flexible blade or blade with necks, the method comprising:
producing one divisible unit which is intended to give rise to one component, assembling said divisible unit with the other constituents of said timepiece mechanism, then separating all said gripping units by breakage of each divisible linkage, and eliminating the sacrificial parts constituted by said gripping units in order that only said components remain in said mechanism.

26 . The method according to claim 25 , wherein assembling of said constituents of said timepiece mechanism is effected on a board or tooling equipment, wherein said board or respectively said tooling equipment are fitted with connection means which comprise at least one assembled rivet and/or one screw-nut assembly and/or at least one component fixed by clamping, and/or an adhesive, for assembling with clamping and/or gluing of a stack of said constituents along the direction of stacking, and wherein the clamping and/or gluing of said connection means is implemented before implementing breaking of each divisible linkage.

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Mallet Daniel
• Cusin Pierre
• Courvoisier Raphael
• Winkler Pascal

Classifications

• G04B17/045 Primary

  with oscillating blade springs (mechanical oscillations maintained by electro-magnetic means, e.g. tuning forks G04C3/10) · CPC title

• G04D3/0035

  for components of the regulating mechanism · CPC title

• G04B43/002

  Component shock protection arrangements (shock damping bearings G04B31/02; shock-damping in the case G04B37/04; protection of the pendulum or chime during transport G04B41/00) · CPC title

• G04B31/02

  Shock-damping bearings {(shock damping in the case G04B37/052, G04B37/055, G04B37/0418)} · CPC title

• G04B15/14 Primary

  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