JPS585268Y2 - Battery cover for mobile watch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a waterproof battery cover structure for a portable watch, particularly when a battery cover is used.

The waterproof structure of the battery cover using the conventional battery cover is the first.
As shown in FIGS. 3 and 3, a battery cover having a press-molded bayonet claw 4 is brought into sliding contact with a back cover 3 having a shape that fits loosely into the battery cover bayonet claw shape, with a packing 2 interposed therebetween, and a bayonet claw bottom surface 7 The battery cover 1 is fixed to the back cover 3 by sliding and attaching it to the back cover plane 3a.

However, with this structure, the processing of the bayonet claw part is mainly press molding, making it impossible to produce a wide variety of products in small quantities.
Since it is necessary to increase the battery cover thickness Ll shown in FIG. 2 and provide a gap to prevent interference with the movement, there are disadvantages such as increasing the total thickness of the exterior.

In order to eliminate the above-mentioned drawbacks, this invention aims to make the shape of the bayonet claw part easy to cut, and to reduce the thickness of the battery cover to reduce the total thickness of the exterior.

This will be explained in detail below with reference to FIGS. 4, 5, and 6.

FIG. 4 is a plan view of the battery cover of this invention, in which two or more opposing linear portions are formed on the outer periphery of the circular bayonet claw by cutting.

The parnet claw 4 that slides on the back cover surface 3a has the shape shown in FIG. 5, and the bayonet claw bottom surface 7 has a sloped shape as shown in the figure.

All of the above shapes are formed by cutting.

FIG. 6 is an assembled sectional view of this invention, in which the battery cover 1 is slid into contact with the back cover 3 through a gasket, and the bayonet claw bottom surface 7 of FIG. 5 is slid and attached to the back cover flat surface 3a. By doing this, the battery cover 1 is fixed to the back cover 3, and the gasket is compressed to maintain waterproofness.

As described above, in this invention, the battery cover thickness L2 can be reduced by attaching the sloped bayonet claw bottom surface and the sloped back cover plane, and the total thickness of the exterior can be reduced.

In addition, since all battery covers can be machined, it is possible to produce a wide variety of products in small quantities, making it easy to supply a wide variety of battery cover shapes according to battery shapes.

Furthermore, the packing has the effect of maintaining the same stability as before in terms of waterproofing because of the correct compression method originally used for packing, which compresses the packing vertically.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional battery cover, Figure 2 is Figure 1A-
3 is an assembled sectional view of the battery cover and back cover, Figure 4 is a plan view of the battery cover of this invention, and Figure 5 is a sectional view of the battery cover of this invention.
FIG. 6 is a sectional view taken along the line A-B, and FIG. 6 is an assembled sectional view of the battery cover. 1...Battery cover, 2...Putskin, 3
...Back cover, 4...Bayonet claw, 5
... Bayonet groove outer circumferential surface, 3a... Back cover plane, 6... Bayonet claw outer circumferential surface, 7...
... Bayonet claw bottom surface, 8 ... Coin groove.

Claims (1)

[Scope of utility model registration request] The flange provided on the outer periphery of the back side of the battery lid is formed into a tapered cross-sectional shape such that the cross section becomes thicker toward the center of the battery lid, and the flange is formed parallel to the center of the battery lid. It is cut at two or more planes, and the back cover part has an opening into which the outer shape of the brim of the battery cover part can be inserted, and a taper corresponding to a part of the taper of the brim is provided around the opening. Features a battery cover for portable watches.