JPH02129817A - Pushbutton device - Google Patents

Abstract

PURPOSE:To eliminate the applying of the excessive pressure to a pushbutton and prevent the damage of a switch by stopping the progress of the pushbutton with a stopper at the predetermined position when the switch is pushed to be operated by an operating member with the impact resilience of a spring. CONSTITUTION:A pushbutton 4 of a pushbutton device is pushed to be progressed against the elasticity of a coil spring 9, and a switch 3 is pushed to be operated by an operating unit 12 of an operating member 10 with the impact resilience of the spring 9. At this stage, the progress of the button 4 can be stopped by a stopper 13 at the predetermined position, and the excessive pressing force to the button 4 is eliminated so as to prevent the damage of the switch 3. The switch 3 is operated by a certain pressure caused by the impact resilience of the spring 9 so as to improve the durability of the switch 3 and aim at the long life of the switch. When the pressure of the button 4 is cancelled, the button 4 is returned to the original position as an operating position of the switch 3 by the impact resilience of the spring 9, and the switch 3 is cancelled by the operating member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a push button device for a push button switch used in telephones, intercoms, etc.

Prior Art 2 -\-7 Figures 3 and 4 show the configuration of a conventional push button device. As shown in FIGS. 3 and 4, the case 51
A self-resetting switch 53 is mounted on a printed circuit board 52 inside. In front of the switch 53, a cylindrical portion 55 of the push button 54 is supported by a guide portion 56 of the case 51 so as to be able to move forward and backward, and a removal stop portion 57 is provided protruding from the outer periphery of the open end side of the cylindrical portion 55. is engaged with the end of the guide portion 56 to prevent removal. An operating section 58 protruding from the center inside the push button 54 is the switch 5.
It is in contact with 3.

Next, the operation of the above conventional example will be explained.

By pressing the push button 54 and moving it forward as shown in FIG. 4, the self-resetting switch 53 can be pressed and activated using the operating section 58.

Thereafter, the self-resetting switch 53 can be released to the inoperative state by releasing the pressure on the push button 54 and retracting the push button 54 as shown in FIG.

Problem 3 to be Solved by the Invention However, in the conventional push button device described above, the pressure of pressing the push button 54 is not directly applied to the switch 53, so if an excessive pressing force is applied, the switch 53 There were problems such as breakage and poor durability.

The present invention solves such conventional problems, and can prevent excessive pressure exceeding a certain pressure from being applied to the switch when pressing the push button, thereby preventing damage to the switch. It is an object of the present invention to provide a push button device that can prevent this, and also improve the durability of the switch and extend its life.

Means for Solving the Problems In order to achieve the above object, the present invention provides a push button that can move forward and backward relative to a switch, an operating member that comes into contact with the switch, and the push button and the operating member. A spring is interposed between the push button and moves the push button back to the non-operating position of the switch. The stopper is provided with a repulsive elasticity stopper for regulating the forward limit of the push button in a state in which the switch is pressed and activated by the operating member.

Effects The present invention has the following effects due to the above structure.

That is, the push button is pushed forward against the elasticity of the spring, and the switch is actuated by the operation member using the rebound elasticity of the spring. At this time, the stopper stops the push button from moving forward at a predetermined position. Therefore, even if an excessive pressing force is applied to this push button, it is possible to prevent pressure exceeding a predetermined pressure from being applied to the switch. Further, as described above, the switch can be operated with a constant pressure due to the displacement of the spring, and durability can be improved.

EXAMPLES Hereinafter, examples of the present invention will be described in five pages with reference to the drawings.

1 and 2 show a push button device according to an embodiment of the present invention, FIG. 1 is a cross-sectional view of the switch when it is not activated, and FIG. 2 is a cross-sectional view of the switch when it is activated.

As shown in FIGS. 1 and 2, a self-resetting switch 3 is mounted on a printed circuit board 2 within a case 1. As shown in FIGS. In front of the switch 3, the cylindrical part 5 of the push button 4 is supported by the guide part 6 of the case 1 so as to be able to move forward and backward.
A removal stopper 7 protruding from the outer periphery of the open end of the cylindrical portion 5 is engaged with the end of the guide portion 6 to prevent removal.

A support portion 8 is protruded from the inner center of the push button 4 , one side of a coil spring 9 is fitted into and supported by the support portion 8 , and the other side of the coil spring 9 is attached to a support portion 11 of an operating member 10 . Fitted and supported. This operating member 1
0's operating part 12 is brought into contact with the switch 3, and in this state, the push button 4 is retracted to the non-operating position of the switch 3 by the elasticity of the coil spring 90, and the removal stop part 7 is retained at the end of the guide part 6. 6 / It has been stopped and removed. A stopper 13 is provided on the inner outer periphery of the push button 4 to limit the forward movement limit of the push button 4, and this stopper 13 pushes the push button 4 against the elasticity of the coil spring 9 to move it forward. ,
Due to the repulsive elasticity of the coil spring 9, the operating portion 12 of the operating member 10 contacts the spring base plate 2 when the switch 3 is pressed and activated, thereby restricting the forward movement of the push button 4.

Next, the operation of the above embodiment will be explained.

The push button 4 is attached to a coil spring 9 as shown in FIG.
The coil spring 9 is moved forward by pressing against the zero elasticity.
The switch 3 is pressed and activated by the operating portion 12 of the operating member 10 with the repulsive force of the switch 3 . At this time, the stopper 13 can stop the advance of the push button 4 at a predetermined position, so that even if an excessive pressing force is applied to the push button 4, pressure exceeding a predetermined pressure is not applied to the switch 3. Therefore, damage to the switch 3 can be prevented. Also, as described above, switch 3 is connected to 71 of coil spring 9.
\-7 Since the switch 3 can be operated with a constant pressure due to its repulsion, the durability of the switch 3 can be improved and its lifespan can be extended. Then, by releasing the pressure on the push button 4, the repulsive force of the coil spring 9 causes the push button 4 to return to its original position, which is the non-operating position of the switch 3, as shown in FIG. releases switch 3.

In this way, according to the above embodiment, the switch 3 is operated with a constant pressure due to the displacement of the coil spring 9, so that damage to the switch 3 due to excessive compression can be prevented and the durability of the switch 3 can be improved. can.

Effects of the Invention As described above, according to the present invention, the push button is pushed forward against the elasticity of the spring, and the switch is actuated by being pressed by the operation member using the rebound elasticity of the spring.
At this time, the stopper is used to stop the forward movement of the push button at a predetermined position, so that even if excessive pressing force is applied to the push button, pressure exceeding the predetermined pressure will not be applied to the switch. Therefore, damage to the switch due to excessive pressing force can be prevented.In addition, as the switch is operated with a constant pressure due to the displacement of the spring as described above, the durability of the switch can be improved and the service life can be extended. It is possible to aim for

[Brief explanation of the drawing]

1 and 2 show a push button device according to an embodiment of the present invention, FIG. 1 is a cross-sectional view of the switch when it is not activated, FIG. 2 is a cross-sectional view of the switch when it is activated, and FIGS. FIG. 4 shows a conventional push button device, FIG. 3 is a sectional view of the switch when it is not activated, and FIG. 4 is a sectional view of the switch when it is activated. DESCRIPTION OF SYMBOLS 1... Case, 2... Printed circuit board, 3... Self-resetting switch, 4... Push button, 9... Coil spring, 10... Operating member, 13... Stopper substitute Name of person: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] a push button that can move forward and backward with respect to the switch; an operating member that abuts the switch; and a push button that is interposed between the push button and the operating member and that retreats the push button to a non-operating position of the switch. A spring, which is provided protruding inside the push button, moves the push button forward against the elasticity of the spring, and uses the rebound elasticity of the spring to press and operate the switch with the operating member. A push button device equipped with a stopper and a stopper for regulating the forward limit of the.