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Method for improving concentricity when using spiral balance spring mechanical watch and spiral balance spring

A mechanical watch, concentricity technology, applied in mechanically driven clocks, clocks, frequency-stabilizing mechanisms, etc., to solve the collision and destruction of adjacent turns, deformation of spiral geometry, and the unfavorable ability of oscillators to adjust time reliably Influence and other issues, to achieve the effect of easy manufacturing and temperature compensation

Active Publication Date: 2014-01-29
MASTER DYNAMIC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 3. In some cases, a non-concentric hairspring can significantly distort its helical geometry, causing adjacent revolutions to collide and destroy each other, as well as creating a non-isochronous system
Any change in the Young's modulus of the balance spring with temperature will adversely affect the oscillator's ability to reliably adjust time

Method used

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  • Method for improving concentricity when using spiral balance spring mechanical watch and spiral balance spring
  • Method for improving concentricity when using spiral balance spring mechanical watch and spiral balance spring
  • Method for improving concentricity when using spiral balance spring mechanical watch and spiral balance spring

Examples

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Embodiment Construction

[0105] refer to figure 1 , for illustrative and explanatory purposes, shows a simplified schematic diagram of a conventional hairspring 10 in a relaxed state with a total of 13.5 revolutions.

[0106] The hairspring turn is composed of two parts, namely a main part 11a and an outer part 11b. The main body portion 11 a forms an Archimedean helix with a constant pitch, wherein its inner end is connected to the collet 12 . Collet 12 is in turn rigidly connected to a balance wheel (not shown). The outer part lib has a significantly increased pitch to make room for the placement of studs 13 . All parts 11a and 11b have a constant cross-section.

[0107] Line 14 indicates the connection point between collet 12 and hairspring body portion 11a, which enables the reader to better track the angle of rotation of collet 12.

[0108] As will be appreciated by those skilled in the art, conventional hairspring 10 is but one example of many possible hairspring shapes, but this example wil...

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Abstract

Disclosed are a method for improving concentricity when using a spiral balance spring mechanical watch and a spiral balance spring. The spiral balance spring has an inner end portion used for being engaged with an inner pile, an outer end portion used for being engaged with a stud, a first indexing disc portion extending from the inner end portion toward the outer end portion, and a reinforcing portion positioned at the outer circle of the balance spring, the reinforcing portion has cross section second moment different from that of the first indexing disc portion, and bending rigidity of the reinforcing portion is enabled to be larger than that of a single indexing disc portion. The method includes the following steps: minimizing a value function of whole rotating amplitude of the balance spring in use; improving the cross section second moment of the first indexing disc portion and the reinforcing portion, wherein the value function is related to net concentricity of the balance spring. The spiral balance is easy to manufacture, the reinforcing portion can be used for improving concentricity of the balance spring, and the balance spring further can realize temperature compensation effect.

Description

technical field [0001] The present invention relates to a new design for the hairspring of a mechanical watch. More precisely, the invention relates to a method of designing such a balance spring for improved concentricity during operation of a mechanical watch, and also to a spiral balance spring for a mechanical watch. Background technique [0002] The hairspring is a core component in a mechanical watch. The hairspring is one of the two main components of a watch's oscillator, the other being the balance wheel. Oscillators provide the means for time regulation through their simple harmonic motion. [0003] The balance acts as an inertial element and is engaged with the inner terminal of the helical balance spring. The helical geometry of the hairspring is usually provided in the form of an Archimedean spiral, usually with a constant pitch. The outer terminal of the balance spring is usually fixedly attached to a fixed stud. [0004] Ideally, the hairspring provides t...

Claims

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Application Information

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IPC IPC(8): G04B17/06G04B17/22G04B18/06
Inventor 程浩
Owner MASTER DYNAMIC LTD
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