JPS6225751Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic watch, particularly to a back cover structure of an electronic watch that uses a plastic back cover.

As shown in FIG. 1, the conventional back cover structure of an electronic watch includes a vapor-deposited surface 1a on the inside of a plastic back cover 1, and a conductive spring 2 of a module 2.
It makes contact with a and performs grounding between the module and the case. Then, a body 3 made of metal and a back cover 1
The abutment surface 3a is in contact with the vapor deposition surface 1a to establish electrical conduction, and the module 2 is pushed up via the middle frame 4 by the repulsive force of the back cover packing 5.

However, in such a structure, when the back cover is attached and removed, the conduction spring 2a of the module 2 rubs against the vapor deposition surface of the back cover, and as a result, the vapor deposition surface 1a of the back cover 1 is peeled off, and even on the abutment surface 3a of the body 3. A similar phenomenon was occurring. In addition, the abutting surface with the case became corroded and could no longer be electrically conductive, impairing the functionality of the watch. Furthermore, vapor deposition on the inside of the back lid 1 has drawbacks such as extremely high cost.

The purpose of this invention was to eliminate the above-mentioned problems such as peeling and corrosion of the vapor deposited part on the back side of the back cover and high cost, ensure continuity from the module to the back cover and the body, and at the same time provide a function to push the module up. height,
This provides an electronic clock that can be streamlined and reduce costs.

The present invention will be explained in detail below with reference to FIG. FIG. 2 is a sectional view of this invention, and in this figure, 6 is a conductive rubber, and 7 is a conductive leaf spring. The conductive rubber 6 is fixed to the hole 7a of the leaf spring 7, and the leaf spring 7 is either integrally molded with the plastic back cover 1 or provided as a separate part at one or more places, and the conductive rubber 6 is brought into contact with the module 2. ing. Furthermore, the upper part 7b of the leaf spring 7 is always in contact with the body due to the push-up of the back cover gasket 5, thereby establishing electrical continuity.

As mentioned above, in this invention, the conductive rubber fixed to the leaf spring is always in contact with the module, and since this leaf spring is in contact with the body due to the repulsive force of the back cover, there is no connection between the module and the module through the back cover. Since the leaf spring is held between the back cover gasket at the joint between the body and the back cover, it is difficult for dirt to enter from the outside, and there is no possibility of poor conduction due to corrosion. Furthermore, since the conductive rubber is in contact with the module and has a pushing function, there is no need for an intermediate frame to support the module, which has the effect of streamlining and reducing costs.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the conventional device, and FIG. 2 is a side sectional view of this invention. 1... Back cover (plastic), 1a... Vapor deposition surface, 2... Module, 2a... Conductive spring, 3...
...Torso, 4...Middle frame, 5...Back butapatsukin, 6...
...Conductive rubber, 7...Plate spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A watch module, a plurality of conductive leaf springs to which conductive rubber is fixed, a plastic back lid to which a plurality of these leaf springs are attached either integrally or as separate parts; It consists of a metal body that houses the watch module and is electrically connected to the back cover via a plate spring, and a conductive rubber fixed to the plate spring houses the watch module and the back cover is connected to the body. The watch module is arranged at a position where it comes into contact with the electrode of the watch module in the fitted state, and has a height that presses the watch module between the watch module and the back cover, and the watch module is supported by conductive rubber. The back cover structure of an electronic watch is characterized by: (2) The back cover structure of an electronic timepiece as set forth in claim 1 of the utility model registration claim, wherein the leaf spring that comes into contact with the exterior body to establish electrical conduction is fixed by a back cover gasket.