JPH0139606B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to illuminated pushbutton switches.

An object of the present invention is to provide a unit combination type in which a pushbutton operating section and a switch section are configured individually and used in conjunction with each other, so that the electrical connection between the electrode of the illumination emitter and the external connection terminal is stable. It is an object of the present invention to provide an illuminated push button switch which is easy to assemble and can be manufactured in a small size.

The most characteristic feature of the present invention is that a common terminal lead piece is provided along the outer surface of the side wall from the front center of the front wall of the lead piece holder surrounding the switch mechanism, and a conductive A bridge fitting made of a resilient elastic material and having tips at four corners protruding from the opening of the housing including the lead piece holder toward the operating section is mounted, and tips at the four corners of the fitting are connected to the common electrode of the light emitter in the operating section. located where it is configured to make contact with a conductor that is

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a longitudinal sectional view of the entire illuminated pushbutton switch. The entire device is divided into a push button operation section 1 and a switch section 2, and external terminals for the switch and illumination lamp are led out from the rear end of the switch section 2. In the operation section 1, a plunger 12 that engages with a push button 11 on the front side penetrates through a lamp holder 13 and reaches the front part of the switch section 2. The lamp holder 13 is equipped with four lamps 14 when viewed from the front.

FIG. 2 shows a rear view of the pushbutton operation unit 1.

A plunger 12 is located in the center of a rectangular housing 15.
passes through the lamp base, and four lamps 14...14 are arranged around it, electrodes 17...17 in the center of the lamp base are directly exposed to the rear end of the operating part 1, and electrodes around the lamp base are exposed to the four corners of the housing 15. Conductor 16 provided
...Conducted to 16.

FIG. 3 shows a front view of the housing 21 of the switch section 2. A through hole 211 through which the plunger 12 penetrates is formed in the center of the front wall of the housing 21 that accommodates the entire switch section, and a spring forming a lead-out circuit for the individual electrodes of the lamp is located at a position corresponding to the center of the lamp arrangement. Openings 212...212 from which the conductors 16...23 protrude are formed, and the conductors 16...
Square small holes 213...213 at positions corresponding to 16
are formed, and from the small holes, tips 273 at the four corners of the connecting fittings constituting the derivation circuit for the common electrode of the lamp...
273 stands out.

The housing 21 of the switch section is a generally box-shaped plastic molded product consisting of a front wall and four side walls, and as described above, the front wall has various openings and the rear is open. A lead piece holder 26 is fitted into the housing 21, and between the front surface of the lead piece holder 26 and the inner surface of the front wall of the housing 21,
A bridge fitting 27 and a common electrode lead piece 28 are held in between.

FIG. 4 shows a lead piece holder 26, a connecting fitting 27,
An exploded perspective view of a common electrode lead piece 28 and one of the four individual electrode lead pieces 29 is shown. The lead piece holder 26 is a plastic molded product, and has a U-shaped cross section consisting of a front wall 261 and two side surfaces 262 and 263 extending rearward from the opposite side of the front wall, and the U-shaped inner surface has two open sides. It has a uniform shape in the penetrating direction A, and the width b ₂ at the rear end is smaller than the maximum width b ₁ . This is to prevent the switch and the switch actuating part from falling off by inserting and assembling them in direction A. On the upper surface of the front wall 261 of the lead piece holder 26, a hub 265 is provided which protrudes in a cylindrical shape around the central through hole 264.
Four deep recesses 266...266 for fixedly housing the individual electrode lead pieces 29 and conduction springs 23...23, and narrow convex portions 267...267 around the recesses are formed. , hub 26
5 and the peripheries of the convex portions 267...267 form a flat portion 268. The front bent portion 281 of the common electrode lead piece 28 is fitted into this flat portion 268, and the lead portion 282 is fitted into a groove formed in the side wall 263. A bridge fitting 27 is placed on top of the common electrode lead piece 28. This crossing fitting 2
7 is made of a plate of a spring conductor such as phosphor bronze;
A central portion 271 that fits into the hub 265 and convex portions 267...267, and foot portions 272...27 that extend in all directions.
2, the entire body is slightly arched, and the tip part 2
73...273 is bent further forward. When fitting the device shown in FIG.
...273 protrudes forward from the small holes 213...213 of the housing, and at the same time the conductive springs 23...2
3 protrude forward from the openings 212...212 of the housing. Furthermore, when connecting this to the operating part 1, the ends of the connecting fittings 27 slide and contact the surfaces of the conductors 16...16 due to the pressing deformation, and the springs 23...23 respectively contact the center electrodes of the lamps. , a lead piece deriving circuit for the individual electrodes and the common electrode is formed. The micro switch 31 is installed in the rear half of a plastic-molded holder 32, a snap action mechanism 33 for operating the switch is provided in front of the switch 31, and an alternate device is installed in the front half of the holder 32. It is. Such a switch mechanism part is attached to the lead piece holder 2 from the direction shown by arrow A in FIG.
It is fitted into 6.

According to the present invention, conductors are provided at the four corners of the rear end face of the pushbutton operating unit housing, and conductors that are electrically connected to the periphery of the base of each lamp are provided, and a connecting fitting is sandwiched between the switch unit housing and the lead piece holder, and the connecting fitting is held between the switch housing and the lead piece holder. The tips of the four legs protrude forward from the opening of the housing and come into contact with the conductor, ensuring reliable and stable contact.Furthermore, since the tips of the crossover fittings slide on the conductor surface during assembly, the contact point It has the effect of cleaning.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the entire embodiment of the present invention, FIG. 2 is a rear view of the push button operation section 1, FIG. 3 is a front view of the housing 21 of the switch section 2, and FIG. 4 is a front view of the switch section 2. It is an exploded perspective view of a part. 1...Push button operation section, 2...Switch section, 1
4... Lamp, 16... Conductor, 21... Switch housing, 26... Lead piece holder, 27...
...Bridging fitting, 28...Common electrode lead piece, 21
1, 212, 213... Opening in the front wall of the housing, 273... Tip of the connecting fitting.

Claims (1)

[Claims] 1 Consists of a pushbutton operating section equipped with a lamp chamber equipped with four light emitting bodies behind a square pushbutton, and a switch section connected to the back of the pushbutton operating section, with the In addition to exposing the individual terminals of the four light emitters, conductors are provided at the four corners of the rear surface to connect to the common terminal of each light emitter, and the switch portion is located at a position corresponding to the individual terminals and the common terminal on the front wall. a box-shaped switch part housing each having an opening; a lead piece holder made of an insulating material that fits into the housing and has a front wall and at least two opposing side walls integrally formed;
It has a switch mechanism housed in the lead piece holder, and is provided with individual terminal lead-out means for connecting the individual terminals of the light emitting body to external connection terminals protruding to the rear of the switch part, and is provided on the front surface of the front wall of the lead piece holder. A common terminal lead piece provided along the side wall of the lead piece holder is made to protrude from the center part of the switch part to the rear of the switch part, and on top of the center part of the common terminal lead piece, a conductive elastic material is placed at the four corners. An illuminated push button switch having a connecting fitting whose tip protrudes forward from an opening in the front wall of the housing, and configured such that the tips of the four corners of the connecting fitting come into contact with the conductor of the operating section.