JPH026602Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a battery holding spring in a battery-powered watch.

Generally, as a power supply contact spring for a battery-powered watch, a battery receiving spring is used on the bottom surface of the battery on the back side of the watch to make an electrical connection between the negative terminal and the circuit board pattern electrode (hereinafter referred to as the pattern), and a battery receiving spring is placed on the top surface of the battery. A presser spring is used to secure the battery and make an electrical connection between the positive electrode and the pattern. The battery receiving spring and battery holding spring ensure continuity with the pattern.
In order to securely hold the battery, it is necessary to fix it to a circuit board or the like by screwing, soldering, or the like, which has the drawback of increasing the number of parts and assembly man-hours.

In order to solve the above-mentioned drawbacks, the present invention is capable of fixing the battery retaining spring in a predetermined position by tightening the screws, without requiring fixing means such as soldering, and making electrical connection with the pattern. It is an object of the present invention to provide a battery presser spring mounting structure that is easy to assemble.

The present invention will be described in detail below based on the drawings, but parts not directly related to the present invention are omitted for the sake of simplification of the drawings.

Fig. 1 is a plan view of a battery holding spring mounting structure according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1. FIG. 4 is a sectional view taken along line CC in FIG. 1.

In the figure, 1 is a battery for driving the clock, and 2 is a device cover made of resin, which fixes module parts and the like to the outer case. Reference numeral 2a denotes a battery storage section provided in the device cover 2 and into which the battery 1 is placed. Although the circuit board 3 is held down by the device cover 2, since there is a space into which the battery storage section 2a can be dropped, the circuit board 3 and the battery storage section 2a do not overlap in cross section.

The battery holding spring 4 is a spring for fixing the battery 1 to the battery storage portion 2a and at the same time establishing an electrical connection between the positive electrode of the battery 1 and a pattern (not shown) formed on the circuit board 3. The hook 4a is used to fix the battery holding spring 4 to the device cover 2, and its cross section is shown in FIGS. 3 and 4. In order to hang the hook 4a, a through hole 2b is provided on the outer periphery of the battery accommodating portion 2a, and a hook receiving portion 2c is provided on the inner surface of the through hole 2b on the side of the battery accommodating portion. As shown in FIG. 4, one of the two hook receiving parts is provided with a slope 2f to make it easier to hang the hook 4a, but of course both may be provided with a slope 2f.

The contact piece 4c of the battery holding spring 4 is bent toward the battery to ensure contact with the positive electrode of the battery 1, and has spring properties. Further, the pattern contact portion 4b that is brought into contact with the pattern has spring properties and is connected through the through hole 2e of the device cover 2.

A battery holding part 2d is provided in the battery storage part 2a at a position symmetrical to the side where the battery holding spring 4 is fixed to prevent the battery 1 from floating up.

As described in detail above, according to the battery holding spring mounting structure of the present invention, when fixing the battery holding spring, there is no need to use any secondary members such as screw tightening or soldering, to ensure a secure connection. In addition, by not using the above-mentioned parts, the space that was considered troublesome until now can be removed, the watch can be made smaller, and the hook structure makes it easy to assemble, and the number of parts and man-hours are reduced. This has great practical effects, such as the ability to significantly reduce costs.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a battery holding spring mounting structure which is an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, and Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1. FIG. 4 is a sectional view taken along the line CC in FIG. 1. 1...Battery, 2...Device cover, 2a...
Battery storage section, 2b...Through hole, 2c...Hook receiving part, 2e...Through hole, 2d...Battery holding part, 2
f...Slope, 3...Circuit board, 4...Battery holding spring, 4a...Hook.

Claims (1)

[Scope of utility model registration request] A battery, a device cover having a storage portion for the battery, a circuit board, and a battery holder that makes electrical contact between an electrode of the battery and an electrode formed on the circuit board and fixes the battery to the device cover. In the battery holding spring mounting structure having a spring, the device cover is provided with a battery accommodating part that does not overlap in cross section with the circuit board, the battery holding spring is provided with a hook part, and the battery holding part is provided around the battery accommodating part. A battery presser spring mounting structure characterized in that the battery presser spring is fixed by providing a hook receiving part for the battery presser spring inside the through hole.