JPH0645223U - Push button device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is intended to provide a push button device which can reduce mechanical clicking sound (clicking sound) at the time of switching a switch and can eliminate rattling of the push button. [Structure] The switch 2 which is a source of a mechanical click sound (click sound) at the time of switching is covered with a switch cover-3 to prevent the click sound from directly leaking to the outside. A switch cover 3 is provided between the switch 2 and the switch 2, and a reaction force from the switch cover 3 is applied to the push button 4 so that the pressing portion 10 at the base portion of the push button 4 is protruded on the rear surface of the front panel 11b. To make the push button 4 loose.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a push button device for actuating a switch such as a short stroke tactile switch.

[0002]

[Prior art]

 As a conventional push button device of this type, as shown in FIG. 7, a switch 21 is mounted on a printed circuit board 20, and a push button main body 23a is inserted into a hole 22a of the front panel 22 from the rear side. A push button 23 is provided, and the push portion 23b of the push button 23 is made to face the switch key top 21a of the switch 21. This push portion 23b is taken into consideration in consideration of the variation in the size of the switch 21 and the mounting floating on the printed circuit board 20. There was a gap between the switch key top 21a and the switch key top 21a.

In this push button device, when the push button 23 is pushed, the switch key top 21a of the switch 21 is pushed by the pushing portion 23b of the push button 23 to operate the switch 21. There was some rattling due to the lack of support.

For this reason, in order to prevent the push button 23 from rattling, a protrusion 24 is provided on the back surface of the front panel 22 as shown in FIG. 8, and a hole 25 is formed in the retaining portion 23c of the push button 23. In some cases, the protrusion 24 is provided in the hole 25 and the push button 23 is supported by using this portion as a hinge.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional push button device, since no sound shielding means is provided in the switch 21, a mechanical clicking sound (clicking sound) is generated at the time of switching, and there is a low image. In addition, in the push button device shown in FIG. 8, the hinge portion is not sufficiently configured, and the push button 23 is apt to rattle, and the hinge portion may not be configured in space. In this case, There was a problem that the push button 23 could not be rattled.

The present invention was made in view of the above problems, and its purpose is not only to reduce mechanical clicking noise (clicking noise) at the time of switching a switch, It is an object of the present invention to provide a push button device that can eliminate the play of the push button.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a push button device including a switch having an operating portion and a push button for pressing the operating portion, and covering the switch between the switch and the push button. It is characterized by being equipped with a switch cover having elasticity.

[0008]

[Action]

 According to the present invention, the switch, which is the source of the mechanical click sound (click sound) at the time of switching, is covered with the switch cover, so this click sound does not leak directly to the outside, and this click sound is generated. Will be reduced.

Further, there is a switch cover between the push button and the switch, and the push button receives a reaction force from the switch cover so that the base portion of the push button comes into contact with the back surface of the front panel. , Pushbutton rattle is eliminated.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view of a push button device according to a first embodiment of the present invention in an exploded state, and FIG. 2 is a vertical sectional view of the push button device.

The push button device of the present invention includes a switch 2 such as a short-stroke tact switch mounted on a printed circuit board 1, a switch cover 3, and a push button 4 provided on a front panel 11.

The switch 2 is configured by providing a switch body 5 with a switch key top 6 which is an operation portion and a terminal 7. The switch cover 3 has a front part 3a, a left side, right side parts 3b and 3c, and upper and lower side parts 3d and 3e, and has a box shape with an open rear surface, and is made of an elastic material such as silicone rubber. There is. Further, notches 8 are formed at the rear edges of the left and right side surfaces 3b, 3c of the switch cover 3 so as not to interfere with the terminals 7 when the switch cover 3 covers the switch 2. .

The push button 4 is provided with a push button body 9, and a retaining portion 9 a is formed at the base of the push button body 9. The retaining portion 9 a has a retaining portion 9 a. The pressing portion 10 is formed so as to deviate from the axis a.

The switch 2 is mounted on the printed circuit board 1 by inserting its terminals 7 into the terminal holes 1a formed in the printed circuit board 1 and soldering it. The switch 2 is mounted on the switch cover. 3, the switch cover 3 has left and right side surfaces 3b and 3c elastically contacting the left and right side surfaces 2b and 2c of the switch 2, and the terminal 7 projects from the cutout portion 8. . The switch cover 3 is prevented from coming off by the contact of the left and right side surfaces 3b and 3c of the switch cover 3 with the left and right side surfaces 2b and 2c of the switch 2.

Further, the front panel 11 located in front of the printed circuit board 1 is provided with a push button 4 by inserting the push button main body 9 into the hole 11 a of the front panel 11 from the rear side. The pressing portion 10 is in contact with the central portion of the front surface portion 3a of the switch cover 3, and the front surface portion 3a is recessed inward.

In this case, the push button 4 receives a reaction force from the switch cover 3, and the front face portion 10 a of the push portion 10 of the push button 4 is in contact with the protruding portion 11 b formed on the back surface of the front panel 11. They are in contact with each other, the front surface 3a of the switch cover 3 does not contact the switch key top 6 of the switch 2, and there is a gap therebetween.

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

By pushing the push button 4, the central portion of the front face 3 a of the switch cover 3 is pushed by the push portion 10 of the push button 4, and the switch key top 6 of the switch 2 is pushed through the front face 3 a of the switch cover 3. Press to activate switch 2.

As described above, since the switch 2 which is the source of the mechanical click sound (click sound) at the time of switching is covered with the switch cover-3, the click sound does not directly leak to the outside, This click sound is reduced.

Further, there is a switch cover 3 between the push button 4 and the switch 2, and the push button 4 receives a reaction force from the switch cover 3 and receives the reaction force from the switch cover 3 and the front portion of the push portion 10 of the push button 4. Since 10a is in contact with the protrusion 11b formed on the back surface of the front panel 11, the push button 4 does not rattle.

Further, as the switch cover 3, as shown in FIG. 4, it is possible to use the one in which the front surface portion 3a is inflated in a dome shape. By using this switch cover-3, the reaction force to the push button 4 becomes large, and the front portion 10a of the pressing portion 10 at the base of the push button body 9 becomes the projection 11b on the back surface of the front panel 11. The contact force is increased, so that the push button 4 can be further prevented from rattling.

Second Embodiment FIG. 5 shows a second embodiment of the present invention. In the push button switch device according to this embodiment, in the structure of the first embodiment described above, the inside of the push button 4 is made hollow, and the thickness of the push button body 9 of the push button main body 9 is thinned to make the switch cover. -3 is white, and the light guide member 12 is arranged behind the push button 4.

The tip portion of the light guide member 12 is bent in an L shape, and the tip end surface 12 a thereof is close to the inlet portion of the hollow portion 4 c of the push button 4. Since the switch cover 3 is white, the reflection efficiency of the light guide member 12 is enhanced, and the light guide member 12 illuminates the push button 4 from the rear side.

Also in this embodiment, since the switch 2 which is the source of the mechanical click sound (click sound) at the time of switching is covered with the switch cover-3, this click sound leaks to the outside directly. However, this click sound is reduced.

Further, there is a switch cover 3 between the push button 4 and the switch 2, and the push button 4 receives a reaction force from the switch cover 3 and receives the reaction force from the switch cover 3 and the front portion of the push portion 10 of the push button 4. Since 10a is in contact with the protrusion 11b formed on the back surface of the front panel 11, the push button 4 does not rattle.

(Third Embodiment) FIG. 6 shows a third embodiment of the present invention. In the push button switch device according to this embodiment, in the configuration of the second embodiment, the corner portion of the light guide member 12 is cut off to form the reflection surface portion 12b, and the reflection of the switch cover-3 is reduced. The portion facing the surface portion 12b is an inclined portion 3d parallel to the reflection surface portion 12b.

In this case, since the reflecting surface portion 12b is present, the reflection efficiency is improved and the push button 4 of the light guide member 12 is efficiently illuminated. Further, the white inclined portion 3a further improves the reflection efficiency.

Also in this embodiment, since the switch 2 which is the source of the mechanical click sound (click sound) at the time of switching is covered with the switch cover-3, this click sound leaks to the outside directly. However, this click sound is reduced.

Further, there is a switch cover 3 between the push button 4 and the switch 2, and the push button 4 receives the reaction force from the switch cover 3 and receives the reaction force from the switch cover 3 and the front portion of the push portion 10 of the push button 4. Since 10a is in contact with the protrusion 11b formed on the back surface of the front panel 11, the push button 4 does not rattle.

In each of the above embodiments, the switch cover 3 covers one switch 2. However, a plurality of switch covers 3 are continuously formed to cover the plurality of switches 2. May be.

[0031]

[Effect of device]

 As described above, according to the present invention, since the switch that is the source of the mechanical click sound (click sound) at the time of switching is covered by the switch cover, the click sound does not leak directly to the outside. , The click sound can be reduced.

Further, there is a switch cover between the push button and the switch, and the push button receives a reaction force from the switch cover, and the base of the push button collides with the back surface of the front panel. There is no rattling of the push button.

[Brief description of drawings]

FIG. 1 is a perspective view of a push button device according to a first embodiment of the present invention in an exploded state.

FIG. 2 is a vertical sectional view of the push button device.

FIG. 3 is a cross-sectional view of a state in which the switch is covered with the switch cover.

FIG. 4 is a cross-sectional view showing a state in which a switch is covered with a switch cover according to another embodiment.

FIG. 5 is a longitudinal sectional view of a push button device according to a second embodiment of the present invention.

FIG. 6 is a vertical sectional view of a push button device according to a third embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a conventional push button device.

FIG. 8 is a vertical cross-sectional view of another conventional push button device.

[Explanation of symbols]

 1 printed circuit board 2 switch 3 switch cover 4 push button 6 switch key top (operation part) 11 front panel

Claims (1)

[Scope of utility model registration request] 1. A push button device comprising a switch having an operating portion and a push button for pressing the operating portion, wherein an elastic switch cover for covering the switch is provided between the switch and the push button. A push button device characterized in that