JPH0535565Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a battery negative terminal fixing structure for an electronic wristwatch.

[Summary of the idea]

In the battery negative terminal fixing structure of an electronic wristwatch, the present invention places the battery negative terminal on a wheel train holder made of an insulating member, and furthermore, brings the conductive part of the negative pattern of the circuit block into contact with the battery negative terminal, and the circuit By stacking a circuit holding plate on the insulated side of the block and fixing it with screw pins planted in the movement frame, it was possible to reduce the number of parts and make the movement smaller.

[Conventional technology]

The fixing structure of the battery negative terminal in a conventional electronic wristwatch is as shown in FIG.
In order to prevent a short circuit between the circuit holding plate 25 and the current path, it is fixed with a separate screw. In addition, 21 is a movement machine frame, 26, 27, 28, 29 and 36 are fixing screws, 30 is a crystal oscillator, 31 is a battery, and 33
indicates a coil.

[Problem and purpose that the invention attempts to solve]

However, the conventional structure in which the gear train bridge and the battery negative terminal are separately fixed requires a large number of fixing screw pins and screws, making it difficult to downsize the movement and economically disadvantageous. In addition, in the conventional structure in which the metal train wheel bridge, battery negative terminal, circuit block, and circuit holding plate are stacked, positioned and fixed with screw pins, there is no insulation between the train wheel bridge and the battery negative terminal to prevent short circuits in the current path. The problem is that the plates must be sandwiched in between, and the effect of reducing the number of parts cannot be expected.

Therefore, the present invention is intended to solve these problems, and its purpose is to provide a negative battery terminal fixing structure for reducing the number of parts in an electronic wristwatch and downsizing the movement.

[Means for solving problems]

In the battery negative terminal fixing structure of the electronic wristwatch of the present invention, the battery negative terminal is placed on the train wheel support made of an insulating member, and the circuit block connects the conductive part of the negative pattern on the lower surface side with the battery negative terminal. They are placed so that they are in contact with each other. Furthermore, the circuit holding plate is stacked on the insulating side of the upper surface of the circuit block, and the gear train bridge, battery negative terminal, circuit block, and circuit holding plate are positioned and fixed with screw pins set on the movement frame.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a plan view of a movement of an electronic wristwatch showing an embodiment of the present invention, and FIG. 2 is a sectional view of FIG. 1. Further, FIG. 2 is a cross-sectional view taken from FIG. 1. In the drawing, 1 is a movement frame, 2 is a gear train bridge, 3 is a battery negative terminal, 4 is a circuit block, 5 is a circuit holding plate, 6, 7, 8, 9 are fixing screws, 10 is a crystal oscillator, 11 1 is a battery, 12 is a fixing screw pin, and 13 is a coil.

In FIGS. 1 and 2, the negative battery terminal 3 is located on an insulated train bridge 2 made of plastic. The negative putter of the circuit block 4 on which the crystal resonator and IC are mounted is in contact with the upper surface of the battery negative terminal 3 and is electrically conductive. Further, a circuit holding plate 5 is stacked on the insulating side of the circuit block 4. The train wheel bridge 2, battery negative terminal 3, circuit block 4 and circuit holding plate 5 are positioned and fixed at the same time by screw pins 12 set in the movement frame 1.

The conventional structure in which the battery negative terminal, circuit block, circuit holding plate, and gear train bridge are fixed separately was to prevent short circuits in the current path, but as shown in Fig. 3, the battery 31 protrudes from the movement frame 1. However, by using a gear train bridge made of insulating material, the battery negative terminal can be placed on the gear train bridge, and it can be planted in the movement frame. The number of fixing screw pins and fixing screws can be reduced, and the battery 11 can be housed in the movement frame as shown in FIG. 1, resulting in an economically advantageous structure.

[Effect of idea]

As described above, according to the present invention, the battery negative terminal fixing structure in an electronic wristwatch includes placing the battery negative terminal on the train wheel bridge formed of an insulating member,
Furthermore, the circuit block and circuit holding plate are stacked on top of this, and the structure is such that they are positioned and fixed at the same time using screw pins planted in the movement frame, so the number of fixing screw pins and screws can be reduced, making it possible to downsize the movement and make it more economical. This has the effect of being advantageous.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the movement of the electronic wristwatch according to the present invention. Figure 2 is the − of Figure 1.
FIG. FIG. 3 is a plan view of a movement of a conventional electronic wristwatch. 1, 21... Movement machine frame, 2, 22...
Gear train bridge, 3, 23...Battery negative terminal, 4, 2
4...Circuit block, 5, 25...Circuit holding plate.

Claims (1)

[Scope of utility model registration request] A movement machine frame, a gear train bearing made of an insulating material and serving as a bearing for a gear train, a circuit block on which an IC and a crystal oscillator are mounted, a battery negative terminal that connects the conductive part of the negative pattern of the circuit block to the negative pole of the battery, and It is composed of a circuit holding plate for fixing the circuit block, the battery negative terminal is placed on the upper surface of the train wheel bridge, and the circuit block is connected to the conductive part of the negative pattern on the lower surface side and the battery negative terminal. The circuit blocks are placed so as to be in contact with each other, and the circuit holding plate is placed on the insulating side of the upper surface of the circuit block, and the train wheel bridge, battery negative terminal,
A battery negative terminal fixing structure for an electronic watch, characterized in that a circuit block and a circuit holding plate are positioned and fixed using screw pins planted in a movement frame.