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Watch with calendar mechanism

By designing the date wheel and feed lever mechanism with the same rotation center in a clock with a calendar mechanism, the problems of frequent month-end corrections and inaccurate date display in the prior art are solved, and a thin design and reliability of date display are achieved.

Inactive Publication Date: 2010-07-28
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Since the existing third type of clock with a calendar mechanism includes a stepping motor and an ultrasonic motor, the date feed mechanism becomes thicker, the motor drive circuit is complicated, and the size of the IC (Integrated Circuit: Integrated Circuit) is increased, requiring a large number of electronic parts.

Method used

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Examples

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Effect test

no. 1 approach

[0059] Next, a first embodiment of a timepiece with a calendar mechanism according to the present invention will be described with reference to the drawings. Embodiments of the present invention described below are embodiments in which a timepiece with a calendar mechanism is constituted by a mechanical timepiece. The following description describes the structure in which the timepiece with a calendar mechanism of the present invention is applied to a mechanical timepiece, but the present invention can be applied not only to a mechanical timepiece but also to an analog electronic timepiece. That is, the concept of "timepieces with a calendar mechanism" in this specification includes not only "mechanical timepieces", "analog electronic timepieces", but also analog timepieces based on all other operating principles.

[0060] (1.1) The overall structure of the movement

[0061] refer to Figure 1 to Figure 3 as well as Figure 22 , the movement 100 is made of a mechanical cloc...

no. 2 approach

[0155] Next, a second embodiment of the timepiece with a calendar mechanism of the present invention will be described. The following description will mainly describe the points of difference between the second embodiment of the timepiece with a calendar mechanism of the present invention and the first embodiment of the timepiece with a calendar mechanism of the present invention. Therefore, the description related to the above-mentioned first embodiment of the timepiece with a calendar mechanism of the present invention applies here to the parts that are not described below.

[0156] refer to Figure 19 , the second date wheel feed rod 570 is moved to the maximum in the direction toward the tooth portion 566 of the second date star wheel 523 of the second date wheel 562 . refer to Figure 20 , through the further rotation of the date feed claw 212 , the first date wheel 552 rotates counterclockwise by one tooth pitch by means of the force of the first date positioning rod 5...

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Abstract

The present invention aims to provide a watch with a calendar mechanism which has a first date indicator and a second date indicator and which is of a satisfactory operability. The watch with a calendar mechanism of the present invention is equipped with a second date indicator feeding lever (570) adapted to move based on the rotation of the first date indicator and to rotate the second date indicator. The first date indicator (512) includes first date indicator tooth portions (516), and calendar shift teeth. The calendar shift teeth consist of a first calendar shift tooth (518a), a second calendar shift tooth (518b) formed at an interval of (360X2 / 31) degrees in a first direction using the first calendar shift tooth as a reference, a third calendar shift tooth (518c) formed at an interval of (360X9 / 31) degrees in the first direction using the second calendar shift tooth as a reference, and a fourth calendar shift tooth (518d) formed at an interval of (360X10 / 31) degrees in a direction opposite to the first direction using the first calendar shift tooth as a reference.

Description

technical field [0001] The invention relates to a clock with a calendar mechanism, and the clock with a calendar mechanism includes a first date wheel for displaying the ones in the date, and a second date wheel for displaying the tens in the date. Background technique [0002] Generally, a mechanical body including a driving part of a timepiece is called a "movement". The finished state in which a dial and hands are attached to a movement and incorporated into a watch case is called a "complete" watch. Among the two sides of the main plate constituting the watch substrate, the side where the glass of the watch case is located, that is, the side where the dial is located is called the "rear side" or "glass side" or "dial side" of the movement. Of the two sides of the main plate, the side where the bottom cover of the watch case is located, that is, the side opposite to the dial is referred to as the "front side" or "bottom cover side" of the movement. The wheel train assem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B19/253
CPCG04B19/25366
Owner SEIKO INSTR INC
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