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Method for Improving Concentricity and Spiral Hairspring When Using Spiral Hairspring Mechanical Watch

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

Active Publication Date: 2017-09-08
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 and Spiral Hairspring When Using Spiral Hairspring Mechanical Watch
  • Method for Improving Concentricity and Spiral Hairspring When Using Spiral Hairspring Mechanical Watch
  • Method for Improving Concentricity and Spiral Hairspring When Using Spiral Hairspring Mechanical Watch

Examples

Experimental program
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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

A method of improving concentricity when using a mechanical watch with a spiral hairspring, and a spiral hairspring; said hairspring having an inner end portion for engagement with a collet, and an outer end portion for engagement with a stud, from said a first index plate portion extending from the inner end portion toward the outer end portion, and a reinforcement portion at the outer ring of the balance spring, the reinforcement portion having a different transverse width than the first index plate portion second moment of area; such that the bending stiffness of the reinforced portion is greater than the bending stiffness of the single index portion; wherein the method comprises the step of: by minimizing a cost function for the overall rotational amplitude of the hairspring in use, for the second Said second moment of cross-section of a dial portion and said reinforcement portion is improved, wherein said cost function is related to the net concentricity of said hairspring. The invention is easy to manufacture, the reinforcing part can be used to improve the concentricity of the balance spring, and the balance spring can also realize the effect of temperature compensation.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G04B17/06G04B17/22G04B18/06
Inventor 程浩
Owner MASTER DYNAMIC LTD
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