JPS6345701Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an illuminated push button switch.

BACKGROUND OF THE INVENTION Among push button switches arranged on decorative panels of audio products and the like, there are some which light up the periphery of the push button in response to a pressing operation so that the operating state can be confirmed.

Conventionally, as shown in FIG.
Panel 1 is slidably inserted into the
A push button 4 that projects upward, a push rod 5 that projects to the rear of the push button 4 and passes through the collar 2 and the diffuser plate 3, and a plunger 6 that abuts the tip surface of the push rod 5, and is not shown. It is inserted on the outer periphery of the push rod 5 between the switch body 7 positioned and arranged on the board, the tip surface of the push rod 5, and the diffusion plate 3,
A spring 8 that always urges the push rod 5 toward the plunger 6, and a lamp 9 located on the rear side of the diffuser plate 3 that blinks in conjunction with the on/off operation of the switch body 7 by the pressing operation of the push button 4. When the lamp 9 is turned on, the light is scattered by the diffuser plate 3, and this scattered light passes through the transparent collar 2 and illuminates the outer periphery of the push button 4, thereby confirming the operation. It's becoming like that.

However, in this type of push button switch, the optical axis center of the lamp 9 is located at the push rod 5.
As shown in Figure 2, the shadow of the crossed area appears on the lighting surface of Color 2, and the dark field area (dark area A in the figure) Moreover, since the lamp, switch and push button parts are assembled separately, the structure is complicated and the cost is quite high.
Furthermore, there were also drawbacks such as mounting errors due to misalignment between the substrate and the decorative panel.

This idea was created in view of the above drawbacks, and its purpose is to eliminate color unevenness on the lighting surface, improve the appearance, simplify assembly, and eliminate problems caused by installation errors, etc. The goal is to eliminate the

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

3 and 4 show an illuminated push button switch according to this invention, in which 10 is a decorative panel that forms the front of an audio product such as an amplifier, tuner, cassette deck, etc., and 11 is a decorative panel arranged at a predetermined distance on the back of this panel 10. These are mounting boards for switch bodies, etc., arranged in parallel at intervals.

The panel 10 has a plurality of mounting holes 10a formed at predetermined intervals, and a transparent collar 12 such as an acrylic transparent resin molded body is fitted and fixed in each mounting hole 10a.
A push button 13 is slidably fitted into the inner peripheral portion of the button.

Further, a switch body 14 is arranged on the substrate 11 in alignment with the sliding center axis of the push button 13,
Further, the plunger 15 of the switch body 14 is positioned opposite to the push button 13, and furthermore, a lamp 16 is arranged near the switch body 14. This lamp 16 blinks in conjunction with the on/off operation of the switch body 14, and is used to confirm the operation.

Further, a rectangular box-shaped diffusion member 17 is fixed to the back surface of the push button 13 via a connecting portion 17a.

This diffusion member 17 is made of, for example, a milky-white transparent material made by matting a plastic molded body, and surrounds the outer periphery of the switch body 14 and the lamp 16, and also has the push button 13 on its inner periphery.
A push rod 18 coaxial with the sliding center axis of the push rod 18 is integrally formed to protrude and come into contact with the plunger 15. A pair of extension parts 19, 19 are integrally formed on the other end of the diffusion member 17, and a pair of long holes 2 are bored on the outer periphery of the mounting position of the switch body 14 and the lamp 16 of the substrate 11.
0 and 20 and protrudes from the back surface of the board 11. A flange 19a bent outward into an L-shape is formed at the tip of this protrusion.
A coil spring 21 is attached to the outer periphery of the extension portion 19 between this flange 19a and the back surface of the substrate 11.
is inserted, and the coil spring 21 pushes the diffusion member 19 together with the push button 13 into the plunger 15.
It is biased towards the side.

The spring pressure of this coil spring 21 is set to be smaller than that of the plunger return spring (not shown) of the switch body 14, so if the push button 13 is pressed from the position shown in the figure, The plunger 15 of the switch body 14 is pressed down,
When the switch is turned on and off and the pressed state is released, the push button 13 is returned to its original position by the biasing pressure of the plunger 15.

When the lamp 16 is turned on by pressing this button, the light irradiates the inner wall of the diffusion member, becomes averaged light from the front surface, is irradiated to the outside, and passes through the transparent collar 12 to reach the surface of the panel 10. It will be displayed.

Incidentally, reference numeral 22 in the figure is a light shielding plate disposed between adjacent pushbutton switches to prevent light leakage due to adjacent light emission.

Furthermore, as a method of assembling the push button switch configured as described above, the collar 12 is attached to the panel 10 side in advance.
In addition to fixing the push button 13 and the diffusion member 1.
7 etc. are assembled in advance on the board 11 side, and the push button 13 is positioned and attached to the collar 12 to complete the assembly.

In this case, even if the mounting positions of the panel 10 and the board 11 are shifted from side to side, there are two long holes on the board 11 side.
0 and 20 are formed, the push button 13 and the diffusion member 17 move left and right along the elongated holes 20 and 20, and errors in their mounting positions are eliminated.

As explained in detail above, in the illuminated push button switch according to this invention, the switch body and the lamp are surrounded by the diffusion member as described above, so that the light from the lamp is averaged from the front of the diffusion member. Since the display is illuminated with brightness and displayed on the front surface of the panel through color transmission, there is no partial dark field, a uniform illumination state is obtained, and the external appearance is improved. In addition, with this invention, most of the parts that make up the push button switch are assembled on the board, making assembly easy and low cost by simply assembling them on the panel side. It also has the advantage of being able to eliminate assembly problems caused by misalignment between the panel and the board.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional illuminated push button switch.
2 is a front view of the same, FIG. 3 is a sectional view of the illuminated push button switch according to the invention, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 10... Decorative panel, 11... Board, 12...
Color, 13...Push button, 14...Switch body,
15...Plunger, 16...Lamp, 17...
Diffusion member, 18... Push rod, 19... Extension portion, 20, 20... Elongated hole, 21... Coil spring.

Claims (1)

[Scope of utility model registration request] A transparent collar that is fitted and fixed into a mounting hole formed in a decorative panel, a push button that is slidably fitted into the inner circumference of this collar, and a button that is mounted on a substrate provided on the back of the panel. a switch body disposed facing the push button, a lamp disposed adjacent to the switch body and blinking in conjunction with the on/off operation of the switch body, one end of which is connected to the rear surface of the push button; A light-transmissive diffusion member that surrounds the switch body and the lamp and has a push rod integrally formed on its inner surface that contacts the plunger of the switch body, and an extension portion that extends to the other end of the diffusion member. An illuminated push button switch comprising: a spring inserted into the outer periphery of a protrusion from an elongated hole formed in the substrate to the rear side to constantly bias the diffusion member together with the push button toward the plunger side.