JPH021782Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating mechanism for a push button switch used in a timepiece such as a stopwatch.

Conventionally, many electronic and digital stop watches have been provided with a push button on the side of the periphery, and the push button is generally pressed to operate the watch, and is the main component of the watch. The circuit board is arranged parallel to the display surface of the watch.

Therefore, various mechanisms have been provided that are used as mechanisms for converting the press operation of a push button that operates parallel to the circuit board into an electrical signal on the circuit board, but they require a large number of parts and are expensive to manufacture. They were expensive, had problems with the reliability of contact pushbuttons, etc., and were vulnerable to drop impacts.

In order to eliminate the above-mentioned drawbacks, the present invention has an extremely simple structure in which a conductive rubber contact fixed to a push button lever is operated in the same way as a push button that operates parallel to the circuit board, and yet The conductive contact rubber fixed to the push button lever has a structure in which both ends of the conductive contact rubber are pushed out in parallel, such as a pressing projection provided near the tip of the push button lever that presses the contact plate spring. By pushing both tips out parallel to each other by the surface so that they come into contact with the contacts on the circuit board, we aim to reduce failures, ensure reliable operation, and reduce manufacturing costs. This eliminates the feeling of fatigue and prevents malfunctions.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a plan view of a push button of a stopwatch as an embodiment of the present invention, excluding the back cover, FIG. 2 is a cross-sectional view of the vicinity of the push button of the present invention, and FIG. 3 is a perspective view of the vicinity of the push button of the present invention.

Reference numeral 1 designates a push button provided on the periphery of the stopwatch, and a push button lever 1a is provided on the back side of the push button, and the push button lever 1a is adapted to rotate at a predetermined angle about a rotating shaft 2.

Further, a protrusion 3 is provided near the end of the push button lever 1a closer to the push button 1.

Reference numeral 4 denotes a click leaf spring, which is fitted into a spring receiver 5 fixed to the inside of the front frame 12, and returns the push button lever 1a, which has been rotated by a predetermined angle, to its original position when pressed against the push button 1. .

Reference numeral 6 denotes a conductive contact rubber mounting portion which is configured to sandwich a bifurcated conductive contact rubber 7 and is mounted on the push button lever 1a.

Reference numeral 7 denotes a conductive contact rubber branched into a bifurcated shape. When the push button 1 is pressed, the push button lever 1a rotates around the rotating shaft 2, the conductive contact rubber 7 moves in the direction b, and the push button lever 1a The fork-shaped branched ends are pressed against the contact portions 8 of the circuit board 9 .

8 is a circuit board 9 facing the conductive contact rubber 7;
The electrically conductive contact rubber 7, which is a contact part provided on the side of the rotating shaft 2, has a bifurcated branch, and the amount of movement is smaller when it is closer to the rotating shaft 2, and the amount of movement is larger when it is further away from the rotating shaft 2. In order to match this, the contact grooves are made shallower on the side with the smaller amount of movement and deeper on the side with the larger amount of movement, so that when the push button 1 is pressed, the contact portion comes into contact with the groove at the same time.

11 is a return coil spring for the push button lever 1a;
A click leaf spring that is fitted into the spring receiver 10 fixed inside the front frame 12 and the tip of the push button lever 1a, and returns the push button lever 1a, which has been rotated by a predetermined angle, to its original position by pressing the push button 1. 4 and the spring used together.

9 is a circuit board, and 12 is a table frame.

The present invention has the above configuration, and its operating mechanism will be explained next.

When the push button 1 is pressed in the direction of the arrow a, the push button lever 1a rotates in the direction of the arrow b parallel to the circuit board 9 about the rotating shaft 2, and presses the head of the conductive contact rubber 7.

The forked tip of the pressed conductive contact rubber 7 snaps into contact with the contact portion 8 of the circuit board 9 to reliably control the electrical contact, and when the pressure is stopped, the push button 1 snaps into place. It is returned to its original position by the spring 4 and return coil spring 11.

As described above, the push-button switch mechanism according to the present invention is extremely simple in that the electrical circuit is controlled by pressing the conductive contact rubber 7 fixed to the push-button lever 1a that operates parallel to the circuit board 9. Therefore, it is possible to create a timepiece that is thinner and lighter than conventional timepieces, has low manufacturing costs, is easy to assemble, and since the contacts are made of conductive rubber, there are almost no failures due to wear parts.

Furthermore, when switching on the switch, the operating mechanism not only provides a reliable feeling to the operator, but also has a highly innovative operation mechanism that causes almost no stress or fatigue.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a push button of a stopwatch excluding the back cover as an embodiment of the present invention, Fig. 2 is a sectional view of the vicinity of the push button of the present invention, and Fig. 3 is a perspective view of the vicinity of the push button of the present invention. . 1... Push button, 2... Rotating shaft, 4... Click leaf spring, 7... Conductive contact rubber, 8... Contact part, 9
. . . circuit board, 11 . . . shows a return coil spring.

Claims (1)

[Scope of utility model registration request] In a timepiece equipped with a push button on the periphery, the push button lever operates parallel to the circuit board, and when the push button is pressed near the tip of the push button lever, the tip comes into contact with the contact section provided on the circuit board. 1. An operating mechanism for a push-button switch, characterized in that a conductive contact rubber mounting portion is fixed to the push-button lever, and the conductive contact rubber mounting portion is formed to sandwich a fork-shaped conductive contact rubber.