JPH0346422Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a small illuminated switch used in various electrical equipment, and in particular to the structure of a push button switch that can be made low in height. .

[Prior art and its problems] As a conventional illuminated switch, there is one shown in FIG. 5, for example. A dome-shaped spring member 30 made of insulating rubber is attached to the housing 20 in which the fixed contact piece 10 is installed, and a conductive contact 40 is fixed to the lower surface of the dome-shaped spring member 30.
A plunger 50 with a slit 52 formed on the side surface
is attached to the spring member 30 so as to be movable up and down, and a translucent push button 60 is attached to the upper surface thereof. A light emitting body 70 such as an LED is fixed to the housing 20 by passing the lead 72 through the slit 52 so that the light emitting part 74 is located in the space inside the plunger 50.

However, this configuration has the disadvantage that the height of the switch increases and it is difficult to make it thin. In addition, it takes time and effort to attach and fix the light emitter, and when soldering it to a printed circuit board, there is a problem that flux tends to enter the contact portion of the switch along the leads 72.

The present invention aims to eliminate such conventional drawbacks.

[Means for Solving the Problems] The present invention consists of an annular portion integrally formed of an elastic insulating material and a substantially conical thin portion supported on the inside of the annular portion at the lower center of the annular portion. It has a pedestal part that protrudes from above, a spring member having a conductive contact attached to the lower surface of the annular part, and a light emitting body such as an LED is mounted on the pedestal part. It is something.

[Embodiment] FIG. 1 shows an embodiment of an illuminated switch according to the present invention, and parts corresponding to those of the conventional example shown in FIG. 5 are given the same reference numerals.

Housing 20 in which a pair of fixed contact pieces 10 are implanted
A hole 22 is formed in the center of the bottom plate. The spring member 30, which is integrally molded from an elastic insulating material such as rubber, has a ring-shaped annular portion 31, as is clear from the plan view in FIG. 2 and the bottom plate view in FIG.
, a conical thin part 32 , and a pedestal part 33 supported by the thin part 32 and protruding from the center of the annular part 31 , and a conductive contact 40 is fixed to the lower surface of the annular part 31 . has been done. The pedestal part 33 is provided with two through holes 34, and a protrusion 35 of a size that fits into the hole 22 of the housing 20 is formed on the lower surface, and the light emitting part 74 of the light emitter 70 is formed on the upper surface.
A recess 36 is provided that is large enough to accommodate the following.

The spring member 30 is in a state in which the protrusion 35 is fitted into the hole 22 and the pedestal part 33 is placed on the bottom plate of the housing 20. Suitable materials for the spring member 30 include highly transparent materials such as silicone and ethylene propylene rubber.
Further, these materials may be colored by mixing a light diffusing material therein.

The light emitting body 70 is attached by inserting the lead 72 into the through hole 34 and fitting the light emitting portion 74 into the recess 36 . A push button 60 made of a translucent material is placed on the spring member 30, and is prevented from coming off the housing 20 by a convex portion 24 formed at the upper end of the housing 20.

To assemble this switch, first, the spring member 30 is installed in the housing 20 into which the fixed contact piece 10 is insert-molded, by fitting the protrusion 35 into the hole 22. Then, the lead 72 is inserted into the through hole 34 and the light emitting body 70 is mounted on the pedestal part 33. Next, after placing the push button 60 on the spring member 30, the convex portion 24 may be formed by crushing a portion of the upper end of the housing 20.

In the switch that has been assembled in this manner, when the push button 60 is pressed down, the contact 40, which descends with the deformation of the thin wall portion 32, connects the pair of fixed contact pieces 1 to 1.
0 is connected, and at the same time the push button 60 is switched to the on state, the push button 60 is illuminated from below by the light emitter 70 to display the operation.

FIG. 4 shows another embodiment of the present invention, in which a plurality of switches are built into the same housing 20 instead of being constructed as a single switch. In this embodiment, the spring member 30 is not provided with the projection 35 as described above.
is used. The spring member 30 is a pedestal portion 33
is mounted on the bottom plate of the housing 20, and after the push button 60 is placed thereon, the entire upper surface is covered with a flexible top sheet 80.

[Effects of the invention] According to the invention, since the light emitting body is housed in the spring member, not only can the height of the entire switch be lowered, but also the spring member is made of a transparent material, so that the push button can be pressed. It can brightly illuminate the surrounding area. Further, since the periphery of the lead of the light emitting body is sealed by the pedestal, flux intrusion into the contact portion is prevented. moreover,
The spring member can also be used as a socket for the light emitter, and the number of parts is small and assembly is simple, and productivity can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the illuminated switch according to the present invention, Fig. 2 is a plan view of the spring member, Fig. 3 is a bottom view of the spring member, and Fig. 4 is a bottom view of the spring member.
The figure is a partial front sectional view showing another embodiment of the illuminated switch of the present invention, and FIG. 5 is a front sectional view showing a conventional example. 10...Fixed contact piece, 20...Housing, 22
... Hole, 30 ... Spring member, 31 ... Annular part, 32 ... Thin wall part, 33 ... Pedestal part, 34 ...
Through hole, 40...Contact, 70...Light emitter, 72
...Lead.

Claims (1)

[Scope of utility model registration request] It has an annular part integrally formed of an elastic insulating material and a pedestal part that is supported inside the annular part through a substantially conical thin part and protrudes below the center of the annular part. a spring member having a conductive contact attached to its lower surface; a housing having at least a pair of stationary contact pieces facing the contact attached and a through hole provided approximately in the center of the bottom plate;
and a light emitting body having a lead, the spring member is placed on the bottom plate of the housing, the light emitting body is mounted on the pedestal, and the lead of the light emitting body is inserted into the hole of the housing through the through hole provided in the pedestal. An illuminated switch featuring