JPH05298959A - Push-on switch - Google Patents

Abstract

PURPOSE:To provide a push-on switch used for various electronic equipment, which is of a thin type in combination with electronic equipment being small and light. CONSTITUTION:Fixed contact areas 12, 16 and a center fixed contact area 15 are printed on a thin resin plate 1, and a moving contact 14 is provided thereon and additionally covered with a sealing film to form a push-on switch 14. In this way, a thin type push-on switch is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-on switch used as various signal changeover switches for consumer and industrial electronic equipment.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 3 is a perspective view of a conventional push-on switch, and FIG. 4 is a side sectional view of the same. According to the figure, 1 is a plastic case having an opening on the upper side, and on the bottom surface thereof is an outer fixed contact integrated with a circuit connecting terminal 2 and a center integrated with another circuit connecting terminal 3. Fixed contact 5
Are provided by insert molding. Reference numeral 6 denotes a dome-shaped movable contact made of an elastic metal thin plate, the outer peripheral end of which is in constant contact with the outer fixed contact 4. Reference numeral 7 denotes a sealing film made of a flexible insulating sheet. By sealing the inside of the case 1 by adhering a portion in contact with the open end surface of the case 1 with an adhesive, the central portion of the sealing film is pushed. The sealing film 7 is made of a flexible thin film so that it can be bent downward.

The operation of the above embodiment will be described below. When the central portion of the film 7 is pushed downward, the central portion of the movable contact 6 is bent downward to contact the central fixed contact 5 to close the switch circuit. Become. When the downward pushing force is removed, the movable contact 6 is restored to the original dome shape and is separated from the central fixed contact 5, so that the switch circuit is opened.

[0004]

However, in the above-mentioned conventional push-on switch, since the outer fixed contact 4 and the central fixed contact 5 which are integrated with the terminals 2 and 3 are insert-molded, the thickness of the case 1 is reduced. There is a problem that the switch cannot be thinned and the switch cannot be thinned.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an excellent push-on switch capable of extremely thinning the switch.

[0006]

In order to solve the above-mentioned problems, the present invention provides a fixed contact portion and a central fixed contact portion corresponding to a terminal portion by printing on a thin resin plate.

[0007]

As described above, according to the present invention, since the thin resin plate is printed to form the circuit by providing the terminals and the fixed contacts, the switch case can be made extremely thin. is there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the push-on switch of the present invention will be described with reference to FIGS. 1 is a side sectional view, and FIG. 2 is a top view.

As shown in FIG. 1, 11 is a thin resin plate, and 12 and 16 are fixed contact portions which are in constant contact with the outer periphery of the movable contact 14, which are formed on the resin plate by printing. 15
Is a central fixed contact portion formed on a resin plate by printing similarly to the fixed contact portions 12 and 16, and an insulating layer is further laminated on the central fixed contact portion at a portion which is always in contact with the movable contact 14. It is provided by printing.

Reference numerals 17 and 18 denote terminal portions provided by multi-layer printing, in which meltable solder provided at the end portions of the resin plate 11 is partially overlapped with the fixed contact portions 12 and 16 and provided by multilayer printing.
Is another terminal portion in which the meltable solder provided on the other end portion of the resin plate 11 is partially overlapped with the central fixed contact portion and provided by multilayer printing. By using meltable solder for the terminal portions 17 and 18 and the other terminal portions 19 and 20, surface mounting by a reflow solder is possible.

Reference numeral 13 is a sealing film that covers the movable contact 14 and prevents dust from entering the switch from the outside.

In the above embodiment, the terminal portion 17,
Although 18 and the other terminal portions 19 and 20 are provided on the resin plate 11, they may be extended to the end surface or the bottom surface of the resin plate 11.

[0013]

As described above, according to the present invention, since the central fixed contact portion, the insulating layer, the fixed contact portion, and the terminal portion are provided on the thin resin plate by printing, the push-on switch can be made thinner. is there.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of a push-on switch according to the present invention.

FIG. 2 is a top view of the same.

FIG. 3 is a perspective view of a conventional push-on switch.

FIG. 4 is a sectional view of the same side.

[Explanation of symbols]

 11 Resin Plate 12 Fixed Contact 13 Sealing Film 14 Moving Contact 15 Central Fixed Contact

Claims (2)

[Claims] 1. A resin plate, at least a fixed contact portion and a central fixed contact portion formed by printing on the resin plate, and a movable contact disposed on the resin plate and having an outer periphery in constant contact with the fixed contact portion. A push-on switch composed of an insulating layer formed by printing on a central fixed contact portion with which the movable contact always contacts, and a sealing film covering the movable contact. 2. A terminal portion is formed by printing meltable solder on each of the fixed contact portion and the central fixed contact portion.
Push-on switch as described.