JPH0241790Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field to which the invention pertains The present invention relates to a small switch, and more particularly to an illuminated small push button switch using an elastic movable contact piece with a bulged central portion.

(b) Conventional technology Conventionally, this type of push button switch uses a movable contact piece (so-called disk contact) with a bulged (protruded) central portion, in which the movable contact piece is moved in the operating direction of the handle (actuator or push rod). In other words, the handle moves in opposition to the protruding direction of the movable contact piece, that is, the protruding direction of the movable contact piece and the operating direction of the handle are the same. Therefore, there was a drawback that it was not possible to form a small illuminated push button switch.

(c) Purpose of the invention The present invention was made to eliminate the above-mentioned drawbacks of the conventional technology. Therefore, the purpose of the present invention is to create a movable light-emitting device that is curved in a direction that makes an angle of 90 degrees with the placement position of the light emitting body. An object of the present invention is to provide a novel light-emitting type small-sized push button switch which can be extremely miniaturized by rationally arranging contact pieces.

(d) Structure of the invention In order to achieve the above object, the illuminated small push button switch according to the invention is a switch that operates a movable contact piece to open and close by operating a push rod, in which at least the central portion of the push rod is operated. and the upper surface portion is a transparent portion, the bottom surface of the transparent portion is a sloped surface, and a light emitting body that emits light to be irradiated onto the sloped surface is disposed around the sloped side of the sloped surface, and the light emitting body is arranged in the same direction as the push rod. Moreover, a concave groove is provided on the inner surface of the switch body at a direction of 90 degrees with respect to the position where the light emitter is disposed, and a plurality of movable contacts are formed in the concave groove with a bulged and curved central portion. The push rod is constructed by disposing the pieces on the outside of the push rod with the outer sides of the bulging curved portions facing each other.

(e) Embodiments of the invention Next, preferred embodiments of the invention will be specifically explained with reference to the drawings.

Figures 1 to 6 show an embodiment of the present invention, in which Figure 1 is a sectional view of the main part, Figure 2 is an exploded perspective view, and Figure 3 is a bottom view with the switch board and push rod removed. Figure 4 is an explanatory diagram of the optical system showing the state of light projection from the light emitter to the push rod in the present invention, Figure 5a,
6b is a diagram for explaining the operation of the present invention, and FIG. 6 is an enlarged bottom view of the main part showing how the movable contact piece is attached to the switch body.

In the figure, reference numeral 11 indicates a switch body, and a switch board 12 is fixed to the bottom of the switch body 11 by coupling with a concave-convex relationship between a hole 11a and a protrusion 12a. Switch body 1
1, there are two opposing grooves 11b, 11
b (see FIGS. 3 and 6), and in these grooves 11b and 11b, two movable contact pieces each formed of an elastic plate and curved with a bulged central portion are formed. 13, 13 are locked with their protruding outsides facing each other. In FIG. 6, the dotted line indicates the state in which the movable contact piece 13 is pressed and depressed. On the switch board 12 near each movable contact piece 13, 13, there are fixed pieces 14, 14 that are always in contact with the movable contact piece 13, 13, and fixed contacts 15, 15 that are selectively in contact with the movable contact piece. has been planted.

A return spring 1 is located approximately in the center of the switch board 12.
6 is attached, and the upper end of the return spring 16 is connected to the lower end of a push rod (handle or actuator) 17 that moves up and down inside the switch body 11 through a through hole 11c of the main body 11. The push rod 17 is provided with a stepped portion 17a, and this stepped portion 17a engages with the shoulder portion 11d of the switch body 11, thereby restricting upward movement. The switch board 12 has a stepped portion 12b.
is formed, and a light emitting body 18 is attached to this stepped portion. 19 indicates a light emitter terminal.

The push rod 17 must be made of synthetic resin or glass, and at least its central portion 17b must be made of a transparent material. In addition, the central portion 17b
The lower part of the transparent body portion is an inclined surface 17c as shown in the figure. Therefore, the entire push rod 17 may be made of a transparent material, or its outer periphery, bottom surface or inclined surface 17 may be made of a transparent material.
The lower part of c may be made of a translucent or opaque material. Furthermore, the lower inclined surface 17c of the push rod
The light emitting element 18 may be mirror-like to increase the efficiency of reflecting light from the light emitter 18.

Movable contact pieces 13, 13 are provided on the lower outer surface of the push rod 17.
A protrusion 17d is provided for sliding, pressing and deforming the bulging outer surface of the protrusion 17d, thereby bringing it into contact with the fixed contacts 15, 15. however,
As a modification, the push rod 1 may be modified without providing this protrusion 17d.
The movable contact piece may be configured to be pressed by the lower part of the side surface of 7.

The light emitting body 18 such as a lamp, LED, neon bulb, etc.
is arranged approximately perpendicularly to the arrangement position of the movable contact pieces 13, 13 with the push rod 17 as the center, and the fourth
As shown in the figure, the light emitted from the light emitter 18 is guided above the push rod 17 from the side surface of the push rod 17. In particular, the lower part of the transparent part 17b of the push rod 17 is made into an inclined surface 17c to make the reflection of light more efficient and to direct the light upward.

Further, an inclined surface 11e is provided on the inner surface of the switch body above the light emitter 18, thereby increasing the effect of light reflection. However, this inclined surface 11e is not an essential requirement of the present invention. As a modification, this inclined surface can also be made of a white color or a mirror surface with high reflection efficiency.

The fixed piece 14 can also be formed integrally with the movable contact piece 13.

When the switch is operated, as shown in FIGS. 5a and 5b, the push rod 17 is moved downward in the direction of the arrow, so that the protrusions 17d and 17d of the push rod move against the movable contact piece 1.
Slide and press the bulged outer surfaces of 3 and 13. As a result, the bulging outer surfaces of the movable contact pieces 13, 13 deform inward and come into contact with the fixed contacts 15, 15 disposed in the vicinity, thereby turning the switch "ON".
When the pressing force of the push rod 17 is removed, the push rod is moved upward by the return spring 16, whereby the movable contact piece 1
3 and 13 are restored and are no longer in contact with the fixed contacts 15 and 15, and the switch is turned "OFF". As shown in FIG. 5b, the movable contact pieces 13, 13 may be arranged at a slight inclination to make the sliding pressure by the push rod 17 smoother and to improve the operating feel of the switch.

(f) Effects of the invention The invention is constructed and operates as described above, and the invention produces the following effects.

First of all, in the present invention, the lower surface of the push rod serving as the illumination part is an inclined surface, and the light emitter is arranged around the inclined side of this inclined surface, and at an angle of 90 degrees with respect to the location of the light emitter. Because it has a movable contact piece that curves in an angular direction, it has the feature that it can be made extremely compact for an illuminated push button switch. Therefore, the terminals of the switch and the light emitter can be placed in extremely appropriate positions from the user's side, and wiring work etc. can be streamlined.

Second, the light from the light emitter installed on one side of the switch body enters from the side of the push rod, and since the push rod has an inclined surface, the switch has good reflection efficiency and the upper surface of the push rod is brighter. be able to.

Thirdly, since the light emitting body is not structured to move together with the push rod, breakage of the light emitting body is eliminated, and a push button switch with a long life that can withstand long-term use can be obtained.

Fourthly, because of the structure in which the outer surface of the movable contact piece, which is formed of an elastic plate with a curved center part, is pressed by sliding with the outer part of the push rod, it has an extremely good operating feel and has more than two poles of illumination. It became possible to obtain a compact push button switch.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being a central sectional view of the main part, Figure 2 being an exploded perspective view, and Figure 3 being a bottom view with the push rod and switch board removed. , Figure 4 is a cross-sectional view for explaining the optical system, Figure 5 is a cross-sectional view for explaining the optical system.
Figures a and b are explanatory views of the operation, and Figure 6 is an enlarged bottom view of the main part showing how the movable contact piece is attached to the switch body. 11...Switch body, 11a...hole, 11b
...Concave groove, 11c...Through hole, 11d...Shoulder,
11e... Slope portion, 12... Switch board, 12
a...Protrusion, 12b...Step, 13...Movable contact piece, 14...Fixed piece, 14a...Terminal continuous to the fixed piece, 15...Fixed contact, 15a...Terminal continuous to the fixed contact , 16...Return spring, 17...Push bar, 17a...Step, 17b...Central transparent body, 1
7c...Slanted surface, 17d...Protrusion, 18...Light emitter, 19...Light emitter terminal.

Claims (1)

[Scope of utility model registration request] In a switch that opens and closes by operating a movable contact piece by operating a push rod, at least a central portion and an upper surface portion of the push rod are made transparent, and
The bottom surface of the transparent part is a sloped surface, and a light emitting body that emits light to be irradiated onto the slope is arranged around the slope side of the slope, and in the same direction as the push rod and at the position where the light emitting body is disposed. A concave groove is provided on the inner surface of the switch body in a direction at an angle of 90 degrees with respect to the concave groove, and a plurality of movable contact pieces each having a bulged and curved central portion are inserted into the concave groove so that the movable contact pieces are curved in the bulging curve. An illuminated small push button switch, characterized in that it is disposed on the outside of the push rod with the outside facing each other.