JP2976560B2 - Push switch and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long life type push switch used for a data input device of OA equipment, video / audio equipment, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional push switch will be described with reference to FIGS. According to the figure, a cup-shaped insulating case 1
And a contact 3 formed to be adjacent to the inside of the diaphragm, and a diameter 5 to 5 mm formed of a springy metal such as stainless steel or phosphor bronze for a spring. A generally plate-shaped diaphragm 4 having a diameter of 12 mm is disposed thereon, and a cup-shaped cap 7 formed by molding a resin such as vinyl chloride having a diameter of 6 to 14 mm and having a protrusion 5 provided at the center and a bulge 6 provided on the outer periphery is provided thereon. The operation body 9 having a projection 8 formed on the bottom surface for raising and lowering the center of the diaphragm 2 by operating a button is arranged thereon, and these are covered with a cover 10. 7 is a detailed perspective view of the cap 7 shown in FIG. 6, wherein 5 is a projection for pressing the diaphragm, 11 is a hinge portion provided so that the projection 5 can be easily moved up and down, and 6 is a bulge for dust prevention.

[0003]

However, in the above configuration, since the cap 7 has a diameter of only 6 to 14 mm, it is difficult to remove burrs and insert it into the case 1 and it is not suitable for mass production. .

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cup-shaped insulating case in which a groove is provided in a holding portion of a rubber sheet, a diaphragm-holding contact formed integrally with a cup-shaped insulating case. A substantially dish-shaped diaphragm made of a metal having resilience such as stainless steel or phosphor bronze for a spring is disposed on the contact formed so as to be adjacent to the contact, and a flat plate having a cushioning property is disposed thereon. A rubber sheet is arranged, and an operating body that moves the center of the diaphragm up and down by operating a button is arranged thereon, and these are provided with a projection for sandwiching the rubber sheet in a groove of a holding portion of the rubber sheet and an operating body opening. It is constructed by covering with a cover.

[0005]

According to the present invention, a rubber sheet having a flat cushioning property is sandwiched between the groove and the projection provided on the cover of the insulating case having the groove formed in the holding portion of the rubber sheet as described above. Since the elasticity of the rubber sheet is increased, a flat rubber sheet can be used instead of the conventional molded cap, and the productivity can be improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the push switch according to the present invention will be described below with reference to FIGS.

According to FIG. 1, a diaphragm holding contact 23 integrally formed in a cup-shaped insulating case 22 provided with a groove 21 in a rubber sheet holding portion, and a contact 24 formed adjacent to the inside thereof. An approximately dish-shaped diaphragm 25 made of a metal having a spring property such as stainless steel or phosphor bronze for a spring is disposed thereon, and a thickness of 0.0
A rubber sheet 26 having a cushioning property made of a sheet of silicone rubber or the like having a hardness of 5 to 2 mm and a hardness of 30 ° to 80 ° is arranged, and a projection 27 is formed on the bottom surface on which the center of the diaphragm moves up and down by operating a button. The operating members 28 are arranged and covered with a projection 29 for sandwiching the rubber sheet 26 in the groove 21 of the holding portion of the rubber sheet and a cover 31 having a convex portion 30 at the opening of the operating member 28. In addition,
The cover 31 is fixed by a claw 32 of the case 22, and 33 is an operation rod of a button for pressing the operation body 28. Here, assuming that the projection size of the operating body from the convex portion 30 of the cover 31 is a, the stroke of the diaphragm is b, and the compression size of the rubber sheet at the time of overload is c, the relationship is b <a <b + c. According to the relationship, when an overload is applied to the rod 33, the rod 33 comes into contact with the projection 30 and the operating body 28 is not pressed down, so that the diaphragm 25 can be protected.

FIG. 2 shows the shape of the flat rubber sheet 26 having cushioning properties used in FIG. 1, which is formed only by punching.

Next, a method of punching and inserting the rubber sheet 26 will be described with reference to FIGS.
A rubber sheet 41 having a ribbon-like cushioning property is supplied by a tray 40 and punched out to a prescribed size by a punch 42 to form a rubber sheet 26, and at the same time, a push switch case 22 supplied by a tray 43 below the sheet. The rubber sheet 26 is inserted into the device. Of course, the supply of the ribbon-shaped rubber sheet 41 and the case 22 and the operation of the punch 42 are synchronized. This method allows continuous punching and insertion of the rubber sheet 26.

FIG. 5 shows another embodiment of the push switch according to the present invention, in which a diaphragm holding contact 53 integrally formed in a cup-shaped insulating case 52 having a groove 51 provided in a rubber sheet holding portion, and a contact 53 provided inside the same. A contact 54 formed so as to be adjacent thereto, and a substantially dish-shaped diaphragm 55 formed thereon from a springy metal such as stainless steel or phosphor bronze for a spring.
Is disposed thereon, a rubber sheet 56 is disposed thereon, and a protective sheet 57 made of a polymer film of 30 to 150 microns polyester or polyimide is disposed thereon,
These are configured by covering them with a projection 58 for sandwiching the rubber sheet 56 in the groove 51 of the rubber sheet holding portion and a cover 60 having an opening 59. The operation projection 61 is formed at the tip of the operation rod 62 from the button, and when the overload is applied, the contact surface 63 of the rod 62 comes into contact with the cover 60, so that the diaphragm 55 can be protected. is there.

[0011]

As described above, a rubber sheet having a cushioning property can be easily processed from a sheet-like rubber having a general cushioning property, and a push switch is formed by sandwiching the rubber sheet. It can be provided.

[Brief description of the drawings]

FIG. 1 is a side sectional view of one embodiment of a push switch of the present invention.

FIG. 2 is a perspective view of a rubber sheet according to the gist;

FIG. 3 is a schematic top view of an apparatus for explaining the assembling method.

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a side sectional view of another embodiment.

FIG. 6 is a side sectional view of a conventional push switch.

FIG. 7 is a perspective view, partly in section, of a cap which is a main part of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Groove 22 Insulating case 23 Contact 24 Contact 25 Diaphragm 26 Rubber sheet 28 Operation body

Claims (4)

(57) [Claims] A contact for holding a diaphragm and a contact formed so as to be adjacent to the inside thereof are integrally formed in a cup-shaped insulating case in which a groove is provided in a holding portion of a rubber sheet. A generally dish-shaped diaphragm made of a metal having spring properties such as phosphor bronze for spring is arranged, and a rubber sheet with cushioning property is arranged thereon, and further, the center of the diaphragm is operated with a button. A push switch characterized by comprising an operating body which moves up and down by means of a cover and a cover provided with a projection for sandwiching the rubber sheet in a groove of a holding portion of the rubber sheet and an operating body opening. 2. A contact for holding a diaphragm integrally formed in a cup-shaped insulating case in which a groove is provided in a holding portion of a rubber sheet, and a contact formed so as to be adjacent to the inside thereof.
On this, a substantially dish-shaped diaphragm made of a metal having spring properties such as stainless steel or phosphor bronze for spring is arranged,
A rubber sheet with cushioning property is arranged on this, a protective sheet made of a polymer film is arranged thereon, and these are covered with a projection for sandwiching the rubber sheet in the groove of the holding portion of the rubber sheet, and a cover with an opening. A push switch characterized by being covered with a cover. 3. The relation of claim 1, wherein a relationship between a projecting dimension a of the operating body from the opening of the operating body of the cover, a stroke b of the diaphragm, and a compression dimension c of the rubber sheet at the time of overload is b <a <b + c. Push switch. 4. The rubber sheet is supplied in the form of a ribbon, which is separated into a predetermined shape by pressing or cutting, and is inserted into a case supplied thereunder. Manufacturing method of push switch.