JPH05151864A - Operating button device - Google Patents

Abstract

PURPOSE:To prevent an operating button from falling in a panel even when a button supporting point part is strongly pressed by mistake at the time of operation by providing a button fall-preventing member, brought into contact with a circular arc-shaped rib with a shaft of the button mounting panel serving as the center, in the operating button. CONSTITUTION:A button fall-preventing member 15 is provided between a side wall 11a of a button main unit 11 and a button supporting member 13, in an operating button 9. The member 15 is formed as a flat plate of length enough to come into contact with a peripheral edge part 19a of a rib 19 protruded in a circular arc shape with a pair of shafts 18, protruded to the inner when the button 9 is mounted in a button mounting hole provided in a front panel 4, serving as the center, to form a point end part of the flat plate in a circular arc shape. Accordingly, since a switch is turned on and off always in a condition that the member 15 is brought into contact with the rib 19, even in the case of strongly pressing the central part of the button 9 by mistake, the member 15 comes into contact with the rib 19 before the shaft 18 is dislocated from a bearing 12, and the button 9 can be prevented from falling in the front panel 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation button device used in various audio equipment such as so-called CD players, video tape recorders, television receivers and the like.

[0002]

2. Description of the Related Art For example, a seesaw-type operation button 51 for pushing left and right switches with a center used as an audio equipment as a fulcrum.
As shown in FIG. 9, a rectangular button body 52 having one opening, a pair of button support members 54 provided with a bearing 53 fitted to a shaft provided in the audio equipment panel, and a switch body. A pair of switch pressing members 55 that press the movable contact member
And is configured.

In the operation button 51, as shown in FIG. 10, a pair of button support members 54 are bent inward with respect to the audio equipment panel 56 as shown by broken lines in FIG.
The bearing 53 provided on the button support member 54 by pushing 2 into the panel 56 is provided with a pair of shafts 5.
7 is fitted and attached. Then, the respective switch pressing members 55 face the movable contact members 60 of the pair of switch bodies 59 fixed on the printed circuit board 58 provided in the device body.

Then, the seesaw-type operation button 51 having the above structure
In general, by pushing the end portion of the operation button 51, each switch pressing member 55 is brought into contact with the movable contact member 60, and by vertically moving this, the switch is turned on and off. Target.

[0005]

However, in an on-vehicle audio device or the like, since it is necessary to operate the operation button 51 during driving, it is not always necessary to press both ends of the operation button 51, and a fulcrum There is a case that the central part that becomes is pressed strongly. In this case, if pushed with a too strong force, the shaft 57 is disengaged from the bearing 53 provided on the button support member 54, and the operation button 51 falls into the opening of the audio equipment panel 57, resulting in an accident.

Therefore, the present invention has been proposed in view of the above technical problems, and provides an operation button device for reliably preventing the operation button from falling into the front panel when the button is operated. With the goal.

[0007]

In order to achieve the above-mentioned object, the present invention provides an operation button device in which an operation button is movably attached by being fitted to a shaft provided in a button attachment panel. Is provided with a button drop preventing member that comes into contact with an arcuate rib centered on an axis provided on the button mounting panel.

[0008]

In the operation button device according to the present invention, the operation button is provided with the button drop-preventing member that comes into contact with the arc-shaped rib centered on the shaft provided on the button mounting panel, so that the operation button is erroneously operated. Even when the central portion, which is the fulcrum of the button, is strongly pressed, the button drop prevention member comes into contact with the arc-shaped rib provided on the panel to prevent the operation button from dropping into the panel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. In this example,
It is an example in which the present invention is applied to a television receiver mounted on an automobile or the like.

As shown in FIG. 1, a television receiver includes a device main body composed of a cathode ray tube 1 and various circuit boards, a frame 2 for supporting the device main body, and the frame 2 inside the device main body. And a front panel 4 for exposing the panel of the cathode ray tube 1 to the outside.
It consists of and.

The cathode ray tube 1 is composed of, for example, R (red), G (green), and B (blue) formed on the inner surface of the panel by one electron beam emitted from one electron gun. A beam index type color television receiver (so-called index type television) that reproduces a color image by sequentially scanning primary color phosphor stripes is used. Such an index-type television uses R, G, B, R, G, B, ... with one electron beam.
.. and these three colors are sequentially scanned, and the color signals input to the CRT are switched in the order of R, G, B according to the scanning. Therefore, unlike the cathode ray tube that uses three electron beams, this index type television does not require a color selection mechanism such as an aperture grill or shadow mask, and has a simple structure similar to that of a black and white cathode ray tube.
It can be a cathode ray tube with an extremely short depth, etc.
It is extremely advantageous for use in an in-vehicle cathode ray tube. In addition,
For the cathode ray tube 1, a 1-gun 3-beam type trade name Trinitron cathode ray tube can also be used.

The frame 2 is for supporting the apparatus body such as the cathode ray tube 1 and is formed by bending a metal plate into a substantially L shape. A fan for radiating the heat and the like inside the device body to the outside is provided on the rear surface portion which is provided upright at a right angle to the bottom surface of the frame 2.

The case 3 is formed with the frame 2 as an outer shape that is large enough to house the main body of the apparatus and can be housed in a space provided in a console of an automobile or the like. The case 3 is composed of a pair of side plates 5 and 6 provided to cover the side surfaces of the device body, and a top surface 7 provided to cover the upper surface of the device body. It is bent and formed so as to form a substantially U shape.

On the other hand, the front panel 4 is attached to the front surface of the main body of the apparatus and has an opening 8 for exposing the panel of the cathode ray tube 1 to the outside. The front panel 4 has operation buttons 9 for operating various functions of the cathode ray tube 1.
Also, various operation buttons 10 for operating equipment such as a CD player and a video tape recorder connected to the equipment body are provided.

For example, of the operation buttons 9 and 10, the seesaw type operation button 9 for volume adjustment has a structure as shown in FIGS. 2 to 5. The operation button 9 is the button body 1
1, a pair of button support members 13 provided with bearings 12 fitted to the shaft provided on the front panel 4, and a pair of switch pressing members for pressing the movable contact members of the switch body fixed on the printed circuit board of the device body. And a member 14.

The button body 11 is formed as a rectangular body having a flat rectangular shape with an open side to be attached to the audio equipment panel, and has a curved shape that draws a parabola so that the operation portion can be easily operated. Further, in consideration of the operability of the operation button 9, the portion where the switch pressing member 14 is provided is provided with a dent having a curved surface shape corresponding to the shape of the tip portion of the finger. The button body 11 has a substantially triangular shape in cross section.

The button main body 11 is provided with a pair of button support members 13 in parallel with each other at a substantially central portion thereof so as to project outward from the opening. The button support member 13 is formed as a plate body having a substantially rectangular shape in a plan view, and its tip end portion is formed in an arc shape for easy attachment to the front panel 4, and
The side facing the axis is inclined.

The button support member 13 is provided with a bearing 12 that fits with the shaft provided on the front panel 4. The bearing 12 is formed as a circular hole having an inner diameter slightly larger than the outer diameter of the shaft provided on the front panel 4. And this bearing 12
An inclined surface (not shown) that functions as a guide for easily fitting the shaft into the bearing 12 is provided at the peripheral edge of the opening of the. That is, the C surface is provided.

Further, the button main body 11 is also provided with a switch pressing member 14 for pressing the movable contact member of the switch fixed to the printed circuit board of the device main body in the same manner as facing the opening side. The switch pressing member 14 is formed as a plate body having a substantially rectangular shape in plan view, and is provided at a position facing a switch fixed on the printed circuit board.

In particular, in the operation button 9 of this embodiment, a button drop prevention member for preventing the button from falling into the panel between the side wall 11a of the button body 11 and the button support member 13. 15 are provided. The button drop prevention member 15 has a pair of shafts 18 that project inwardly of the button mounting hole 17 when the operation button 9 is mounted in the button mounting hole 17 provided in the front panel 4 shown in FIG. It is formed as a flat plate having a length long enough to come into contact with the outer peripheral edge portion 19a of the rib 19 projecting in an arc shape around the center. The tip of the button drop prevention member 15 has a rib 1
It is formed in an arc shape so as to be easily slidably contacted with 9.

The operation button 9 constructed as described above is shown in FIG.
Further, as shown in FIG. 8, the bearing 12 provided on the button support member 13 is fitted to a pair of shafts 18 which face the button mounting hole 17 opened in the front panel 4 and project inwardly of the button mounting hole 17. As a result, they are attached so as to be movable left and right around the shaft 18. Then, the respective switch pressing members 14 oppose the movable contact members 22 of the pair of switch bodies 21 fixed on the printed circuit board 20.

At this time, the button drop prevention member 15 provided on the operation button 9 comes into contact with the outer peripheral edge portion 19a of the rib 19 provided on the front panel 4. When one of the ends of the operation button 9 is pressed in this state, the button drop prevention member 15 slides along the outer peripheral edge portion 19a of the rib 19 having an arc shape to prevent the button drop. The switch pressing member 14 presses the movable contact member 22 into the switch body 21 in a state where the working member 15 and the rib 19 are always in contact with each other. In this way, since the button drop-preventing member 15 and the rib 19 are always in contact with each other when the switch is turned on and off, even if the central portion of the operation button 9 is erroneously pressed strongly, the front of the operation button 9 is inadvertently pressed. It is possible to reliably prevent the panel 4 from falling into the inside.

There may be a slight gap between the button drop preventing member 15 and the rib 19 described above. That is, when the button-down prevention member 15 and the rib 19 come into contact with each other when the operation button 9 is pushed, it is possible to reliably prevent the operation button 9 from dropping into the front panel 4 as described above.

[0024]

As is apparent from the above description, in the operation button device according to the present invention, the button is prevented from coming into contact with the arc-shaped rib centered on the shaft provided on the button mounting panel of the operation button. Even if the center part, which is the fulcrum of the button, is pressed by mistake during operation, the button drop prevention member comes into contact with the ribs and the operation button falls into the panel. Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example in which an operation button device according to the present invention is applied to a vehicle-mounted television receiver.

FIG. 2 is a perspective view of an operation button according to the present invention.

FIG. 3 is a bottom view of an operation button according to the present invention.

FIG. 4 is a vertical sectional view of an operation button according to the present invention.

FIG. 5 is a cross-sectional view of an operation button according to the present invention.

FIG. 6 is a perspective view showing an operation button mounting portion of the front panel.

FIG. 7 is a vertical cross-sectional view showing a state in which an operation button according to the present invention is attached to a front panel.

FIG. 8 is a cross-sectional view showing a state in which the operation button according to the present invention is attached to the front panel.

FIG. 9 is a perspective view of a conventional operation button.

FIG. 10 is a cross-sectional view showing a state in which a conventional operation button is attached to an audio device panel.

[Explanation of symbols]

 4 ... Front panel (button mounting panel) 9 ... Operation button 12 ... Bearing 13 ... Button support member 14 ... Switch pressing member 15 ... Button drop prevention member 18 ... Shaft 19: Rib

Claims (1)

[Claims] 1. An operation button device in which an operation button is movably attached by being fitted to a shaft provided on a button attachment panel, wherein the operation button has an arc shape centered on the axis provided on the button attachment panel. An operation button device characterized in that a member for preventing the button from dropping is provided to come into contact with the rib.