JPH087696A - Push button structure - Google Patents

Abstract

PURPOSE:To reduce the number of constitution parts, reduce assembly manhours, and stabilize quality by integrally forming a panel and a push button restoration spring. CONSTITUTION:When a push button 11 incorporated in a panel 25 is pushed in the arrow F direction, the push button 11 makes rotational motion by setting a rotational fulcrum shaft 27 in the upper part of the push button 11 as a fulcrum. A spring push shaft 14 advances while making a push button restoration spring piece 26 bent, the tip part 13 of the switch push button 12 pushes a switch 36 so as to make the switch 36 act, and at the same time a button push regulation face 19 of the push button 11 abuts on a push button hook front face 29 of the panel 25 so as to eliminate any excessive load applied on the switch 36. When pushing operation applied in the arrow F direction of the push button 11 is released, the push button 11 makes rotational motion by setting the rotational fulcrum shaft 27 as the fulcrum by restoration force of the pushing button restoration spring piece 26 which is bent by the spring push shaft 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button structure incorporated in a panel of an audio device or the like.

[0002]

2. Description of the Related Art The structure of a conventional push button will be described with reference to the drawings. 4 (a) is a front view showing the structure of a conventional push button, FIG.
(B) is BB sectional drawing. Reference numeral 60 denotes a front portion of the audio device, which includes a push button 61, a panel 70, a sponge 75, a sponge holder 78, and the like.

A push button 61 is an operation push button incorporated in a panel 70 of an audio device for switching a receiving channel and selecting a function. The push button has a transillumination character 66, and the function contents of the push button operation by illumination from the back side. Is easy to see even at night. Further, the push button 61 has a mounting portion 64 in which a hole 65 that engages with a rotation fulcrum shaft 71 formed in the panel 70 is formed, and a switch push shaft 62 for operating a switch 81 provided at the rear of the push button. When the pushed push button 61 is returned to the original position, the push button 61 is pushed by the sponge 75 for giving a restoring force, and the push button 61 receives the restoring force and abuts on the edge of the push button mounting hole 72 of the panel 70.
A convex portion 67 that restricts the amount of protrusion of the push button 61 from the push button mounting hole 72 is formed. There are two types of materials: an opaque resin such as black or gray that does not transmit light and a transparent resin that transmits light.
It is formed by color molding or the like.

The panel 70 is the front part of the audio device.
A rotation fulcrum shaft 71 that engages with the hole 65 of the push button 61 is formed in the push button mounting hole 72 of the push button 61, and a resin material is used as the material and is formed by molding. The sponge 75 contacts the convex portion 67 of the push button 61 behind the push button 61 in a slightly compressed state (the convex portion 67 of the push button 61 is
It is provided in a state of being in contact with the edge of the push button mounting hole 72). When the pressing operation is released, the elastic force of the sponge 75 pressed and pressed by the pressing button 61 by the pressing operation is used to return the pressing button 61 to the original position. A foamed sponge is used as the material, and the outer shape is formed by pressing or the like.

The sponge holder 78 clamps and fixes the sponge 75 to the panel 70, and the sponge holder 78 itself is fixed to the panel 70 with screws or the like. A resin material is used for the material of the sponge holder 78 and is formed by resin molding or the like. 80 is an electronic circuit board, and the switch 8
1, a character illumination light source 83, and other electronic components are mounted.

Next, the operation will be described. Panel 70
When the push button 61 incorporated in the is pushed in the direction of arrow G, the push button 6
1 The upper part of the rotation fulcrum shaft 71 is used as a fulcrum, and the convex portion 6
The push button 61 is rotated while compressing the sponge 75 that has abutted against 7. Then, the tip 63 of the switch push shaft 62 pushes the switch 81 to operate the switch 81.

When the pressing operation applied to the push button 61 in the direction of the arrow G is released, the push button 61 rotates about the rotation fulcrum shaft 71 as a fulcrum due to the restoring force of the compressed sponge 75. Is pushed back to the position of, and the convex portion 67 of the push button 61 is fixed to the push button mounting hole 72 of the panel 70 in a pressed state.

[0008]

As described above, in order to obtain the restoring force of the push button 61 in the conventional push button structure,
A sponge 75 and a sponge holder 78 for fixing the sponge 75 to the panel 70 are required, which leads to an increase in the number of constituent parts. Therefore, the number of assembling steps increases, which is disadvantageous in terms of cost. Also in terms of quality, there are variations in the size of the sponge material, bubble density, etc., which may lead to a reduction in the restoring force due to variations in the restoring force of the push button 61 and changes over time.

Therefore, the present invention solves the above-mentioned problems, and provides a push button structure in which the number of constituent parts and the number of assembling steps can be reduced and the quality is stable by using a push button return mechanism that replaces the sponge 75. The purpose is to do.

[0010]

The present invention achieves the above-mentioned object, and is a structure of a push button provided in a panel of an electronic device, wherein the push button is integrally formed with the panel and the push button is attached to the panel. A push button return spring piece that comes into contact with the push button in a pressed state, and the elastic force due to the bending of the push button return spring piece when the push button is pressed causes the push button before pressing the push button when the push button is released. It is characterized in that it is made to return to the state.

Further, the push button is provided with a guide portion that comes into contact with the push button restoring spring piece, and the positioning of the push button with respect to the panel is performed by the contact with the guide portion that comes into contact with the push button restoring spring piece. Characterize. Or
A portion of the guide portion that comes into contact with the push-button restoring spring piece is chamfered so that the push button can be easily attached to the panel.

Alternatively, a portion of the push button return spring piece that comes into contact with the guide portion is chamfered so that the push button can be easily attached to the panel. Alternatively, a widened portion is provided on the spring piece for returning the push button,
A light irradiation area from a light source provided behind the push button is restricted.

[0013]

According to the present invention, when the push button provided in front of the push button return spring piece is pushed in, the push button return spring piece comes into contact with the push button return spring piece, and the push button return spring piece is bent and repulsed by the pushing force of the push button. Power is generated. When the pushing force of the push button is released in this state, the push button returns to its original position by the restoring force of the push button restoring spring piece.

According to the second aspect of the invention, the play of the push button is regulated by engaging the guide portion provided on the push button with the push button return spring piece formed integrally with the panel. The arrangement of the push buttons is uniform, and the appearance quality is improved. Alternatively, according to the third aspect, by chamfering the tip of the guide portion of the push button, the chamfered portion smoothly guides when engaging the push button return spring piece. The engagement can be easily performed without the portion riding on the push button returning spring piece.

Alternatively, according to the fourth aspect, when the chamfered portion provided on the push button return spring piece and the guide portion of the push button engage with each other, the chamfered portion smoothly guides the chamfered portion. The push button guide portion can be easily engaged without riding on the push button return spring piece. Alternatively, according to the fifth aspect, the light irradiation area from the light source provided behind the push button restoring spring piece can be restricted by the widened portion formed on the push button restoring spring piece, so that an unnecessary portion of light is not provided. It is possible to prevent unnecessary light leakage to the outside of the panel by blocking the irradiation to the panel.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. 1 (a) is a front view showing a push button structure, FIG.
2B is a cross-sectional view taken along the line AA, FIG. 2A is a rear view of the push button structure, FIG. 2B is a detailed view of the tip of the spring piece for returning the push button, and FIG. 3 is a guide portion of the push button and for returning the push button. It is a back surface part enlarged view which shows the engagement state of a spring piece.

Reference numeral 10 denotes a front portion of the audio device, which is a push button 1
1, a panel 25, and the like. Push button 11
Is a push button for operation that is incorporated in the panel 10 of the audio device with the upper part as a pivot, and performs switching of the receiving channel and function selection. The push button 11 is composed of characters indicating the function contents by the transillumination characters 17. It is easy to see the function contents when the push button is operated by lighting from. In addition, the push button 11 has a mounting portion 15 in which a hole 16 that engages with a rotation fulcrum shaft 27 formed in the panel 25 is formed,
A switch push shaft 12 for operating a switch 36 provided at the rear of the push button, and a spring push shaft 14 that abuts against the push button return spring piece 26 to bend the push button return spring piece 26 and receive a return force on the push button 11. A guide portion 20 that abuts on and engages with the push button return spring piece 26 to regulate the position of the push button 11, and a guide that guides smoothly when the guide portion 20 engages with the push button return spring piece 26. The chamfered portion 21 provided at the tip of the portion 20 and the hook portion 18 for engaging the button hook portion 28 formed on the panel 25 to prevent the push button 11 from coming out of the front of the panel 25 are formed. There is. The material is formed by a two-color molding process of an opaque resin such as black or gray that does not transmit light and a transparent resin that transmits light.

The panel 25 is a front portion of an audio device or the like, and in the mounting hole 30 of the push button 11, a pivot shaft 27 that engages with the hole 16 of the push button 11, a push button return spring piece 26, and a hook of the push button 11. A button hook portion 28 for engaging the portion 18 and the like are formed. A chamfered portion 43 is formed on the tip end portion 42 of the push button return spring piece 26 to facilitate contact and engagement with the guide portion 20 of the push button 11. It should be noted that the tip end portion 42 of the push button return spring piece 26 and the guide surface 22 of the guide 20 of the push button 11 are brought into contact and engaged with each other to such an extent that no play occurs.
The push button return spring piece 26 includes the push button return spring piece 2
A widened portion 41 for restricting a light irradiation range from a light source provided behind 6 and for shielding excess light is formed.
The position, shape, size, etc. of the widened portion 41 may be set according to the light shielding region. A resin material is used for the material of the panel 25 and is formed by resin molding.

Reference numeral 35 denotes an electronic circuit board, which includes a switch 36 for switching channels and functions and a light source 3 for illuminating characters.
8. Other electronic parts are installed. The electronic circuit board 35 includes the push button pushing-in restricting surface 19 of the push button 11 and the panel 2.
The electronic circuit board 35 is attached so that the front end portion 13 of the switch push shaft 12 is in a position to operate the switch 12 with the front surface 29 of the push button hook 5 of 5 being in contact.

Next, the assembly of the essential parts will be described. When the hook portion 18 of the push button 11 is engaged with the push button hook portion 28 of the panel 25 and the hole 16 of the mounting portion 15 and the rotation fulcrum shaft 27 are aligned and pushed in, the mounting portion 15 is moved inside the rotation fulcrum shaft 27. The fulcrum shaft 27 is inserted into the hole 16 of the mounting portion 15 and serves as a fulcrum of rotation of the push button 11 while being bent in the direction. In this state, the push button return spring piece 26 is in contact with the tip of the spring push shaft 14 in a slightly bent state, and the return force of the push button return spring piece 26 causes the push button hook portion 28 of the panel 25 to push the push button 11 into the push button 11. The hook portion 18 is fixed in a pressure contact state.
As a result, chatter noise between the push button 11 and the panel 25 can be prevented even when vibration is applied.

Next, the operation will be described. When the push button 11 incorporated in the panel 25 is pushed in the direction of the arrow F, the push button 11 rotates with the rotation fulcrum shaft 27 above the push button 11 as a fulcrum.
Then, the spring push shaft 14 advances while bending the push button return spring piece 26, and the tip portion 13 of the switch push shaft 12 pushes the switch 12 to activate the switch 12, and at the same time, the push button 1
The button pressing restriction surface 19 of No. 1 contacts the front surface 29 of the push button hook of the panel 25, and the switch 12 is not overloaded.

When the push operation applied to the push button 11 in the direction of the arrow F is released, the push button 11 is restored by the restoring force of the push button restoring spring piece 26 that has been bent by the spring push shaft 14.
Rotates about the rotation fulcrum shaft 27 as a fulcrum, and the push button 11 returns to the original position. As described above in detail, according to the present embodiment, the push button return spring piece 26 is integrated with the panel 25, and the widened portion 41 is formed in the push button return spring piece 26. It is possible to reduce the number of steps and the number of assembling steps, which leads to cost reduction. Further, by forming the guide portion 20 on the push button 11 and engaging it with the push button return spring piece 26, the backlash of the push button 11 is regulated and the arrangement of the push buttons 11 is aligned, so that the appearance quality is improved.

[0023]

As described above, according to the present invention,
By integrally forming the panel and the return spring for the push button, the number of constituent parts can be reduced and the number of assembling steps can be reduced, leading to cost reduction.

[Brief description of drawings]

FIG. 1 is a front view showing a push button structure according to a first embodiment of the present invention.

FIG. 2 is a rear view of the push button structure of the present invention.

FIG. 3 is an enlarged view of a back surface part showing an engaged state of a push button guide portion and a push button returning spring piece of the present invention.

FIG. 4 is a front view showing a conventional push button structure.

[Explanation of symbols]

 10 ... Front part 11 ... Push button 12 ... Switch push shaft 14 ... Spring push shaft 15 ... Mounting part 25 ... Panel 26 ... Push button return spring piece 27 ... Rotation Dynamic fulcrum axis 35 ... Electronic circuit board 36 ... Switch 38 ... Light source for character illumination

Claims (5)

[Claims] 1. A structure of a push button provided on a panel of an electronic device, comprising a push button restoring spring piece which is integrally molded with the panel and which abuts the push button in a state where the push button is attached to the panel, A push button structure characterized in that when the push button is pressed, the elastic force generated by bending of the push button restoring spring piece restores the push button to a state before the push button is released. 2. The push button structure according to claim 1, wherein the push button is provided with a guide portion that comes into contact with the push button returning spring piece, and the panel of the push button is provided by contact between the push button returning spring piece and the guide portion. Push button structure characterized by being positioned relative to. 3. The push button structure according to claim 2, wherein a portion of the guide portion that comes into contact with the push button return spring piece is chamfered so that the push button can be easily attached to the panel. Push button structure. 4. The push button structure according to claim 2, wherein a portion of the push button return spring piece that comes into contact with the guide portion is chamfered so that the push button can be easily attached to the panel. Push button structure. 5. The push button structure according to claim 1, wherein a widened portion is provided on the push button return spring piece to restrict a light irradiation area from a light source provided behind the push button. .