Angular locking shockproof system

Patent metadata

Field	Value
Publication number	US-11169487-B2
Application number	US-201816156115-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Oct 10, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A shock-absorber device for a wheel arbor of a micromechanical device includes a support which includes a turning-arbor delimited by a rim defining a housing into which a pivot module is inserted. The pivot module includes a setting having a central orifice into which is inserted a bored stone. An endstone is placed on top of the bored stone. The shock-absorber device also includes a spring ring arranged between the support and the pivot module. The shock-absorber device is equipped with a bayonet system for mounting the spring ring. The bayonet system includes a peripheral shoulder under which is formed a circular groove which defines a holding area. The spring ring is equipped on an outer periphery with at least one catch. At least one first notch which leads to the circular groove is provided in the peripheral shoulder.

First claim

What is claimed is:

1. A shock-absorber device for a wheel arbor of a micromechanical device, wherein said shock-absorber device comprises a support which includes a turning-arbor a base thereof being devoid of a bottom and which is delimited at the periphery thereof by a rim, wherein the rim comprises a top surface extended, on the inside of the turning-arbor, by an inner wall, and, on the outside of the turning-arbor, by an outer wall, wherein the rim of the turning-arbor defines a housing into which a pivot module is inserted, wherein said pivot module comprises a setting having a central orifice into which a bored stone which corresponds to a shape and a size of the central orifice is inserted, wherein an endstone is placed on the setting, on top of the bored stone, wherein the shock-absorber device also comprises a spring ring arranged between the support and the pivot module to exert elastic strain on said pivot module, wherein the shock-absorber device is equipped with a bayonet system for mounting the spring ring between the support and the pivot module, wherein said bayonet system comprises a peripheral shoulder which extends from the inner wall of the rim towards the inside of the support, and under which is formed a circular groove which defines a holding area, wherein the spring ring is equipped on an outer periphery with at least one catch which gives said spring ring an outer diameter which exceeds the inner diameter of the peripheral shoulder, wherein at least one first notch which leads to the circular groove is provided in the peripheral shoulder, wherein said first notch defines a first diameter at least equal to the outer diameter of the spring ring, such that the spring ring is presented in such a way that the catch is engaged in the corresponding first notch, and then pivoting the spring ring so as to enable the catch to slide inside the circular groove, under the peripheral shoulder, wherein at least one second notch is machined in the peripheral shoulder, wherein said second notch defines a second diameter less than the outer diameter of the spring ring, such that the catch is interlocked in said second notch, ensuring the angular pivot locking of the spring ring.

2. The shock-absorber device of claim 1 , wherein the micromechanical device is a timepiece movement.

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Merino Antonio
• Conus Thierry
• Villar Ivan

Classifications

• G04B31/04 Primary

  with jewel hole and cap jewel {(jewel bearings with jewel hole and cap jewel G04B31/0082; tools for inserting jewel bearings G04D3/042)} · CPC title

• G04B13/021

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

• G04B31/02 Primary

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

• G04B37/052 Primary

  with shock damping means not related to the winding stem (shock damping bearings G04B31/02; shock protection G04B43/002) · CPC title

• G04B17/32

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