JPS6035767B2 - push button device - Google Patents

Description

[Detailed description of the invention] The present invention relates to push button devices for use in wristwatches.

Conventionally, in a push button device, a metal or resin push button presses a non-conductive rubber provided with a conductive rubber, and the conductive rubber contacts the switch contact and conducts electricity. However, with this structure, when the push button is pressed firmly or repeatedly, the non-conductive rubber with the conductive rubber is crushed and the rubber loses its elasticity. As a result, the push button may not return properly, or the conductive rubber and the switch contact may come into close contact with each other, damaging the switch terminal and at the same time causing the switch to lose its function as a push button. SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned disadvantages and to provide a reliable and inexpensive push button device.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and the push button device includes a cap 1, a non-conductive rubber 2, a presser ring 3, and a main body 4. The non-conductive rubber 2 is integrally molded with a conductive rubber 5 so as to face the pair of switch contacts 7, and the opposite side of the conductive rubber 5, that is, the columnar part, is made of a material such as metal or hard resin, and the main body 4 is formed at the bottom. A stepped portion 4a formed in the stepped hole of
A cap with a flange la for contact with the non-conductive rubber 2 is fixed or laid over the non-conductive rubber 2 by gluing, heat welding, pressing, etc. The step part 4b of the main body 4 and the collar part 2a of the non-conductive rubber 2 are engaged with each other, and the collar part 2a is vertically compressed with the presser ring 3 from the lower part of the collar part 2a, and the presser ring 3 is pressed. The protrusion 3a provided fits into the hole 2b provided in the collar,
The position of the non-conductive rubber 2 is fixed, and the presser ring 3 is pressed and fixed to the main body 4. In this way, the non-conductive rubber 2 held by the presser ring 3 on the stepped portion 4b is maintained at the center position of the stepped hole of the main body 4. In such a structure, when pressed by the cap, the conductive rubber 5 provided on the non-conductive rubber 2 contacts and short-circuits the switch contacts 7, 7, causing current to flow and perform a switch action.

Fig. 2 shows an embodiment in which a large number of push button devices in the embodiment shown in Fig. 1 are used simultaneously. When the cap 1 is placed on the non-conductive rubber 2, the flange 2a of the non-conductive rubber 2 engages with the stepped portion (not shown, but corresponds to the stepped portion 4b in FIG. 1) of the main body 2. The presser ring 3 is pressed and fixed to the main body 4 and a large number of non-conductive rubbers 2 are fixed at the same time, and by pressing the cap 1, the non-conductive rubber 2 is The conductive rubber 5 provided on the switch comes into contact with the switch contact, and current flows to perform a switch action.

As described above, in the present invention, since the length of the non-conductive rubber from the bottom surface of the cap to the top surface of the conductive rubber is long, even if the gap is pressed excessively, the non-conductive rubber absorbs the pressure and the conductive rubber and switch Since the contact pressure between the contacts does not change much, the switch contacts and conductive rubber are not damaged and the switch action is more reliable.The structure of the push button device consists of a cap, a non-conductive rubber integrally molded with conductive rubber, and a presser ring. The structure is rational, and the push button device's waterproofness and return force are both made of non-conductive rubber, making it easy to assemble and significantly reducing component costs. It is possible to reduce the costs of watches that use buttons continuously, stopwatches, clocks with calculators, and alarm clocks.

FIG. 3 shows another embodiment of the present invention, in which the push button device includes a cap 1, a non-conductive rubber 2, and a presser ring 3.
, a main body 4 and a pipe 5.

The non-conductive rubber 2 is integrally molded with a conductive rubber 5 in the direction of the switch contact 7, the upper part on the opposite side of the conductive rubber 5 is made of a material such as metal or hard resin, and the lower part is made of a material such as metal or hard resin. A cap with a flange la is fixed or covered on the non-conductive rubber 2 by gluing, heat welding, pressing, etc., and the non-conductive rubber 2 is inserted from the lower part of the pipe 6, and the step 6b of the pipe 6 and the non-conductive rubber are inserted. The collar 2a of the non-conductive rubber 2 is engaged with the collar 2a, and the retainer ring 3 compresses the collar 2a vertically from the lower part of the collar 2a of the non-conductive rubber 2, and the protrusion 3a provided on the retainer ring 3 engages with the collar 2a. The position of the non-conductive rubber 2 is fixed. Pipe 6 with non-conductive rubber 2 fixed in this way
The conductive rubber 5 provided on the non-conductive rubber 2 is attached from the outside of the main body 4 and fixed in position, and the cap is pressed.
contacts the switch contact 7, current flows, and a switch action is performed. As described above, in the present invention, since the length of the non-conductive rubber from the bottom surface of the cap to the top surface of the conductive rubber can be long, even if the cap is pressed excessively, the non-conductive rubber absorbs the pressure and the conductive rubber and switch Since the contact pressure between the contacts does not change much, there is no damage to the switch contacts or conductive rubber, making it reliable. In addition, since the push button device only needs to be attached from the outside of the main unit, it can be used before the main unit is completed. The push button device can be incorporated into the main body, reducing the number of assembly operations, and maintenance and replacement is easy because the push button device can be attached to the main body from the outside.

In addition, the non-conductive rubber collar is held by a presser ring on the rubber step, which prevents the non-conductive rubber from shifting laterally.As a result, the push button is always kept in the normal position, allowing for stable switch operation. be effective. Further, the present invention has the feature that it can be used in a structure using a large number of push button devices, and can also be used as a single push button, so the push button device can be used in a wide range of applications.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a cross-sectional view of the present invention, FIG. 2 is a perspective view of the push button devices shown in FIG. 1 arranged in the circumferential direction, and FIG. FIG. 2 is a cross-sectional view of the present invention. 1... Cap, 2... Non-conductive rubber,
3... Presser ring, 4... Body, 5...
...Conductive rubber, 6...Pipe, 7...Switch contact. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Cover a non-conductive rubber column with a flange formed at the bottom with a cap, insert the push button with the flange on the cap from the bottom into the stepped hole of the main body, and insert the flange of the cap into the main body. The non-conductive rubber is brought into contact with the cap step and the collar of the non-conductive rubber is held against the rubber step of the main body by a presser ring, and the conductive rubber provided on the lower surface of the non-conductive rubber is provided below the push button. A push button device is characterized in that it is opposed to a switch contact point.