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Gear mechanism, movement and clock

A technology of gear trains and movements, which is applied to gear mechanisms, clocks, mechanically driven clocks, etc. It can solve the problems of non-insertion, reduced assembly, and inability to visually see the position of the transmission gear or the position of the pointer gear in the shaft support hole. , to achieve the effects of suppressing wobbling, shortening the shaft length, and suppressing the deviation of the needle movement

Active Publication Date: 2015-09-16
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in the structure of the above-mentioned Patent Document 1, when the shaft portion is shortened, before the wheel train support is assembled to the base plate (before the shaft portion is inserted into the shaft support hole of the wheel train support), the wheel train support The part may come into contact with the bent part of the pointer restraining spring, so that the pointer gear is pressed to the train support part side
As a result, the meshing of the pointer gear and the transmission gear may be disengaged, or the shaft portion of the pointer gear may not be inserted into the shaft support hole of the gear train support, etc., and the assembly property may be reduced.
[0015] In particular, in the structure of Patent Document 1, when the gear train support is assembled, the pointer gear and the transmission gear are covered by the train train support, so the position of the transmission gear or the shaft support hole relative to the pointer gear cannot be visually seen.
In this respect, it is also a major cause of the decrease in assemblability.

Method used

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  • Gear mechanism, movement and clock
  • Gear mechanism, movement and clock
  • Gear mechanism, movement and clock

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0052] [clock]

[0053] A mechanical body including a driving part of a timepiece is generally referred to as a "movement". The finished state in which a dial and hands are attached to the movement and incorporated into a watch case is called the "complete" of the watch.

[0054] Of the two sides of the bottom plate constituting the watch base plate, the side with the glass of the watch case, that is, the side with the dial is referred to as the "back side" of the movement. In addition, the side opposite to the dial that has the case back cover of the timepiece case among both sides of the bottom plate is referred to as the "front side" of the movement.

[0055] figure 1 It is an external view showing the timepiece 1 according to the embodiment of the present invention.

[0056] Such as figure 1 As shown, the complete watch 1 has a movement 100 , a dial 11 and hands 12 - 14 inside a watch case 3 composed of a case back cover (not shown) and a glass 2 .

[0057] The dial 1...

no. 2 Embodiment approach

[0118] Next, a second embodiment of the present invention will be described. Figure 8 It is a partial sectional view showing the movement 110 according to the second embodiment of the present invention. The difference between the movement deviation suppressing mechanism 131 of this embodiment and the above-mentioned first embodiment is that a pressing force applying portion 190 is formed on the back object presser (back object presser) 130 . In addition, in the following description, the detailed description will be omitted for the same structural parts as those of the first embodiment, and only the different parts will be described.

[0119] Such as Figure 8 As shown, in the movement 110 of the present embodiment, the movement deviation suppression mechanism 131 has a pressing member 170 , a support portion 180 , and a pressing force applying portion 190 .

[0120] The support portion 180 has: a support seat 181 formed on the upper surface of the bottom plate 20 ; and a g...

no. 3 Embodiment approach

[0135] Next, a third embodiment of the present invention will be described. In the hand movement deviation suppressing mechanism 231 of the present embodiment, the difference from the above-mentioned embodiment is that the pressing force applying portion 290 is formed on the base plate 20 . In addition, in the following description, the detailed description will be omitted for the same structural parts as those of the first and second embodiments, and only the different parts will be described. Figure 10 It is a sectional view showing the movement 210 of the third embodiment. Figure 11 It is a perspective view looking at the movement 210 from the front side.

[0136] Such as Figure 10 , Figure 11 As shown, in the movement 210 of this embodiment, the support portion 280 of the movement deviation suppression mechanism 231 has: a support base 81 , a guide pin 282 erected from the support base 81 , and a guide pin formed on the outer peripheral side of the support base 81 ....

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PUM

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Abstract

The invention provides a gear mechanism, a movement and a clock which can realize thinness and improve assembling performance under the condition of restraining swinging and pointer deviation caused by gear inertia. The gear mechanism is characterized by comprising a No.4 wheel (41), wherein two end portions of a wheel shaft (60) can both be supported by a bottom plate (20) and a gear support piece (29) in a mode of rotating relative to the bottom plate (20) and the gear support piece (29); a press component (70) maintained to press the lower end surface (62b) of the No.4 wheel (41); and a press applying portion (90) pressing the press component (70) towards the lower end surface (62b) of a No.4 gear (62), and applying press to the press component (70).

Description

technical field [0001] The invention relates to a gear train mechanism, a movement and a timepiece. Background technique [0002] Between the gears which are rotated by the power transmitted from the power source and mesh with each other, there is a desired gap in the rotation direction, that is, so-called "backlash". In addition, friction between tooth surfaces of meshing gears is appropriately suppressed by the backlash, so the gears rotate. [0003] In this way, the backlash is indispensable for the mutual rotation of the gears, but there are cases where the gears rotate undesirably within the range of the backlash due to the backlash set as the backlash, and so-called "wobble ( がたつき)". [0004] Due to this "wobbling", for example, at the fourth wheel on which the second hand is mounted, a phenomenon called "wobbling" occurs in which the second hand undesirably rotates clockwise or counterclockwise. [0005] Specifically, the moment of inertia of the entire gear is incr...

Claims

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Application Information

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IPC IPC(8): G04B13/00G04B35/00
Inventor 藤原俊行河田正幸小棚木进佐藤贤
Owner SEIKO INSTR INC
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