JPH07220574A - Installation method for click spring in membrane switch - Google Patents

Abstract

PURPOSE:To install click springs speedily and strongly on a membrane switch. CONSTITUTION:An adhesive layer is provided on a back surface of an insulation adhesive sheet 2, pairs of aperture parts 4a, 4b, 4a, 4b... are bored in the insulation adhesive sheet 2, a surface of the insulation adhesive sheet 2 is put to face a mounter 1, and while positioning bosses 3, 3... in the mounter 1 are engaged with positioning holes 5, 5... in the insulation adhesive sheet 2, the insulation adhesive sheet 2 is mounted on the mounter 1. Click springs 6, 6... are inverted, their spherical protrusions are applied to middle positions between the respective pairs of the aperture parts 4a, 4b, 4a, 4b... bored in the insulation adhesive sheet 2, and the click springs 6, 6... are applied to the insulation adhesive sheet 2 in such a way that both end parts of the click springs 6, 6... are positioned to the respective pairs of the aperture parts 4a, 4b, 4a, 4b.... The click springs 6, 6... can thus be installed speedily and strongly on switch contact parts of a membrane by use of the insulation adhesive sheet 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a click spring in a membrane switch, and more particularly to a click spring in a membrane switch which enables quick and strong attachment of the click spring. It relates to the mounting method.

[0002]

2. Description of the Related Art The conventional method of attaching a click spring in a membrane switch of this type is as follows. A method is known in which a spring is placed and the click spring is attached to the membrane with an adhesive tape.

[0003]

The click spring mounting method in the above-mentioned conventional membrane switch is such that the click spring is placed on the membrane and the work of attaching the click spring to the membrane with an adhesive tape is performed. Repeated for the number of springs. Therefore, the attachment work of the click spring is complicated, and the attachment position of the click spring tends to be different.

Further, since the adhesive tape cut for each click spring is used, the end portion of the adhesive tape is easily peeled off, and further, there is a possibility that the attachment position may be displaced, resulting in a difficulty in adhesion accuracy. Therefore, a technical problem to be solved in order to attach the click spring to the membrane quickly and firmly arises, and an object of the present invention is to solve the problem.

[0005]

The present invention has been proposed in order to achieve the above object, and an adhesive layer is provided on the back surface of an insulating adhesive sheet, and a pair of openings are opened in the insulating adhesive sheet. , While inverting the click spring from the adhesive layer side to abut the spherical convex portion at the intermediate portion of the pair of openings,
A method of attaching a click spring in a membrane switch in which both ends of the click spring are positioned in the pair of openings and the click spring is adhered to the insulating adhesive sheet, and a plurality of positioning bosses are mounted on a mounter of the click spring loading device. And a method for attaching a click spring in a membrane switch in which a positioning hole is opened at a position corresponding to the positioning boss of the insulating adhesive sheet and the membrane.

[0006]

According to the invention of claim 1, when the insulating adhesive sheet is placed on the mounter with the adhesive layer facing upward, and the spherical convex portion of the click spring is pressed against the insulating adhesive sheet, the insulating adhesive sheet is clicked. Glued to the entire spherical surface of the spring. A pair of openings are opened in the insulating adhesive sheet, and when the click spring is pressed, the air discharged from the click spring is discharged from the opening.

According to the second aspect of the present invention, the mounter is provided with a plurality of positioning bosses, and the positioning bosses formed in the respective members are aligned with and engaged with the positioning bosses so that different members can be mounted. The switch position and the like are set as the target position. Then, different members are accurately attached to each other at the target positions by bonding the members whose positions have been determined to each other.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a state in which the insulating adhesive sheet 2 is attached to the mounter 1. In the figure, mounter 1
Is a base used for automatically loading a click spring or the like, which will be described later, and the mounter 1 has a plurality of positioning bosses 3, 3.
... is projected.

The insulating adhesive sheet 2 is provided with a pressure-sensitive adhesive layer N on the back surface thereof, and has a pair of circular openings 4a, 4 for example.
b, 4a, 4b ... Are faced to open each other. Further, the insulating adhesive sheet 2 has positioning holes 5, 5, ... Opened at positions corresponding to the positioning bosses 3, 3 ,. The insulating adhesive sheet 2 is made to face the surface of the insulating adhesive sheet 2 with the mounter 1 while engaging the positioning holes 5, 5 ... With the positioning bosses 3, 3 ,. The sheet 2 is placed on the mounter 1. Reference numeral 6 in the drawing is a click spring, and the click spring 6 has a spherical convex portion on one side.

By reversing the click spring 6, a pair of openings 4a, in which spherical protrusions are opened in the insulating adhesive sheet 2,
4b while contacting the intermediate portion of 4b,
The both ends of the above are positioned above the pair of openings 4a and 4b, and the click spring 6 is bonded to the insulating adhesive sheet 2. FIG. 2 is a vertical sectional view showing the vicinity of the openings 4a and 4b of the insulating adhesive sheet 2 to which the click spring 6 is adhered. FIG. 2A shows a state in which the above-mentioned click spring 6 is bonded to the insulating adhesive sheet 2, and the mounter 1
The insulating adhesive sheet 2 is placed on the insulating adhesive sheet 2, and the click spring 6 is adhered to the insulating adhesive sheet 2 with its spherical convex portion abutting on the insulating adhesive sheet 2.

Then, as shown in FIG. 2B, the click spring 6 and the insulating adhesive sheet 2 press-contact the membrane 7 from above. A switch pattern or the like is printed on the membrane 7, and a movable contact 8 and a fixed contact 9 are arranged at the switch contact portion. Then, like the insulating adhesive sheet 2, the membrane 7 has positioning holes (not shown) formed at positions corresponding to the positioning bosses 3, 3 provided on the mounter 1. The membrane 7 engages the positioning holes with the positioning bosses 3, 3 of the mounter 1, and the movable contact 8 of the membrane 7 faces the central portion of the click spring 6 so that the membrane 7 is insulated. It is pressed against the adhesive sheet 2.

In the click spring 6, the curved click spring 6 is expanded by the pressure contact force of the membrane 7, and the air in the click spring 6 faces the insulating adhesive sheet 2 and is opened. It is discharged from the openings 4a and 4b. Then, the click spring 6 is fixed between the membrane 7 and the insulating adhesive sheet 2 while contacting the membrane 7. Thus, the openings 4a, 4b,
When the switching action is performed by pressing the respective click springs 6, 6 due to the provision of 4a, 4b ..., The air at the lower surface portion of the click springs 6, 6 ... The resistance is eliminated, and a smooth switching operation by the click springs 6, 6 ... Is achieved.

Further, when the membrane 7 to which the click spring 6 is fixed is removed from the mounter 1, as shown in FIG.
As shown in FIG. 5, the click spring 6 restores its shape while extending the bonding portion of the insulating adhesive sheet 2 with the click spring 6 by the restoring force of the click spring 6. As a result, the click spring 6 presses the spherical convex portion to bring the movable contact 8 and the fixed contact 9 of the membrane 7 into contact with each other to electrically couple them. Then, the click springs 6, 6 are provided in the pair of openings 4a, 4b, 4a, 4b, which are provided to face all the switch portions of the membrane 7.
Are bonded and the membrane 7 is pressed against the insulating adhesive sheet 2, whereby all the click springs 6, 6 ...
Is attached to the membrane 7.

Thus, the click springs 6, 6 ... Attached to all the switch portions of the membrane 7 are covered and adhered with one insulating adhesive sheet 2, so that they can be attached quickly and firmly. . Furthermore, click springs 6, 6 ...
Since the positioning holes used when the click springs 6, 6 ... Are attached to the membrane 7 can be used even when the membrane 7 is attached to the main body of an electronic device or the like after being bonded to the membrane 7, The membrane 7 can be accurately attached to the main body.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention extends to such modifications.

[0016]

As described in detail in the above one embodiment, the invention according to claim 1 is such that a plurality of click springs can be simultaneously attached to the membrane by one insulating adhesive sheet. Since it is unnecessary to attach the adhesive tape to the membrane for each click spring, which is conventionally performed, the attaching operation is speeded up and the productivity is improved.

Further, since the click spring is fixed to the membrane over the entire insulating adhesive sheet, the insulating adhesive sheet is unlikely to peel off near the click spring, and the adhesive strength of the click spring is significantly enhanced. Furthermore, by sticking the insulating adhesive sheet to the entire membrane, it can be used as a protective sheet for the circuit pattern of the membrane. According to the invention of claim 2, the mounting boss is provided in the mounter, and the positioning hole for engaging with the positioning boss is opened in the insulating adhesive sheet and the membrane to attach the click spring. Therefore, the switch contact portion of the membrane and the click spring are attached. And can be accurately positioned. Further, since the positioning hole can be used even when the assembled membrane switch is attached to the main body switch part of an electronic device or the like, attachment of the click spring to the membrane,
In addition, the accuracy of the mounting position in mounting the membrane switch on the electronic device body is improved.

Thus, the click spring mounting method of the present invention is an invention that exhibits various kinds of effects such as improving the accuracy of products and contributing to the improvement of productivity.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing an embodiment of the present invention.

2A, 2B, and 2C are explanatory vertical cross-sectional views showing the mounting order of the click springs.

[Explanation of symbols]

 1 mounter 2 insulating adhesive sheet 3 positioning bosses 4a, 4b opening 5 positioning hole 6 click spring 7 membrane

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Shinohara 1297 Motoyoshida-cho, Mito City, Ibaraki Prefecture Mitsu Mini Mutek Co., Ltd.

Claims (2)

[Claims] 1. An adhesive layer is provided on the back surface of the insulating adhesive sheet,
A pair of openings are opened in the insulating adhesive sheet, the click spring is inverted from the adhesive layer side to abut the spherical convex portion at an intermediate portion of the pair of openings, and both ends of the click spring are A method for mounting a click spring in a membrane switch, characterized in that the click spring is positioned at a pair of openings and adhered to the insulating adhesive sheet. 2. A mounter of a click spring loading device is provided with a plurality of positioning bosses, and positioning holes are opened at positions corresponding to the positioning bosses of the insulating adhesive sheet and the membrane, respectively. How to attach the click spring in the membrane switch described in 1.