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axis of the timer

A technology for timers and axles, applied in the directions of instruments, bearings, clock driving mechanisms, etc., can solve the problem of reinforcement particles affecting the geometric integrity of the pivot

Active Publication Date: 2021-05-07
ROLEX SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concern is that shedding of reinforcement particles will affect the geometric integrity of the pivot

Method used

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  • axis of the timer
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Examples

Experimental program
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Embodiment Construction

[0050] Refer below figure 1 An embodiment of the timer 120 is described. The chronograph is a watch, such as in particular a wristwatch. The chronograph includes a watch movement 110, in particular a mechanical movement. The movement of the watch includes an oscillator 100, in particular a balance with hairspring 8 oscillator. The balance wheel is mounted, for example, on balance arbor 1 .

[0051] Balance wheel shaft 1 comprises a first functional part 2a, 2b comprising:

[0052] - at least one portion 221a, 221b of the pivot handle 22a, 22b; and / or

[0053] - At least one portion 211a, 211b of the pivot 21a, 21b.

[0054] The first functional part is made of ceramic, and the first functional part has a first outer diameter D1, eg a maximum outer diameter, smaller than 0.5 mm or smaller than 0.4 mm or smaller than 0.2 mm or smaller than 0.1 mm.

[0055] exist figure 1 In the first embodiment represented in , arbor 1 comprises a first pivot 21a, a first pivot shank 22a,...

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PUM

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Abstract

The invention provides a chronograph shaft (1), in particular a balance shaft (1), comprising a first functional part (2a; 2b) comprising a pivot stem (22a ; 22b) at least one part (221a; 221b) and / or at least one part (211a; 211b) of the pivot (21a; 21b; 21'; 21"; 21*), said first functional part being entirely made of ceramic and the first outer diameter (D1) of the first functional part is less than 0.5 mm or less than 0.4 mm or less than 0.2 mm or less than 0.1 mm.

Description

technical field [0001] The invention relates to shafts of chronographs, in particular balance shafts. [0002] The invention also relates to an oscillator or watch movement or chronograph comprising such an axis. Background technique [0003] The balance shaft is the basic component of the chronograph adjustment unit. The balance shaft includes a pivot stem at each end that is extended by a pivot. The balance wheel notably carries a helical spring and oscillates on its pivot in bearings. The pivot shaft and the pivot shank of the shaft, which constitutes the less mechanically robust area, are designed to take up the forces during impact. However, under certain circumstances, especially under high-strength impacts, the pivots may smack their respective bearings due to their small size, especially their small diameter. [0004] Therefore, the axis needs to: [0005] - have a high elastic limit to avoid plastic deformation under large impact; [0006] - strong enough not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04B17/32G04B13/02
CPCG04B13/026G04B17/063G04B17/32G04B31/00G04B1/16G04B17/34G04B15/14G04B13/02G04B13/022G04B31/06
Inventor 瓦尼娜·林克
Owner ROLEX SA
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