JPS61237312A - Push button switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat panel type pushbutton switch used in an operation panel of an electronic device.

2. Description of the Related Art In recent years, as devices have become increasingly computerized, pushbutton switches used in device operation panels are required to be flat panel types that are thin and easy to assemble.
For example, it had a structure as shown in Figure 3. That is, as shown in the same figure, on an insulating substrate 2 having contacts 1, a spacer 4 having openings 3 in the 9th part of the contact 1 is arranged,
A diaphragm 6 made of a spherical elastic metal plate is placed in the opening 3 of the spacer 4, an elastic film 6 is placed on top of the diaphragm 6, and the diaphragm 6 is held in the hole 8 of the case 7. The button part 9 is arranged and the display board 10 is arranged on the upper surface of the case 7. With this structure, as shown in FIG. The switch was changed by moving the button part 9 downward, bending the diaphragm 6, and making the contacts 1 conductive. There is also a device with a structure as shown in FIG. 6, which basically operates as shown above. That is, a spacer 4 having an opening 3 is placed on an insulating substrate 2 having a conductive pattern.
A diaphragm 6 made of a spherical elastic metal plate is placed in the aperture 3 of the spacer 4, a diaphragm 6 having elasticity is placed on top of the diaphragm 6, and a display plate 1 is placed on top of the diaphragm 6.
It had a configuration in which o was placed.

Problems to be Solved by the Invention However, in the above structure, there is a limit to the thinning due to the relationship between the minimum wall thickness during molding of the button portion 9 and the case 7 and the stroke of the diaphragm 5. Due to thinning, the dimensional accuracy of molded parts becomes stricter, which increases costs, and diaphragm deformation occurs.
This may lead to poor recovery, etc.

Therefore, the present invention aims to reduce the number of molded parts to reduce the thickness and
The object of the present invention is to provide a push-button switch that can be lowered in price and prevents the diaphragm from deforming during operation.

Means for Solving the Problem In order to solve this problem, the present invention provides a hole formed in a thin plate by punching, the lower surface of which is in contact with an insulating substrate for operating a switch part, and a protrusion in the center. A button part made of a resin molded product having a thin metal part is fitted into the button part, and a flexible display plate is attached to the top surface.

A punched thin plate is placed between the action display plate and the insulating substrate, and the bottom surface is in contact with the insulating substrate, and the button is made of a resin molded product with a protrusion and a thin wall in the center.This unique operation Also, there is no deformation of the diaphragm contact, making it easy to reduce the thickness and cost.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 and 2 of the drawings.

First, in the embodiment shown in FIG. 1, 12 is an insulating substrate having contacts 11, and the contacts 11
A thin plate 14 made of synthetic resin having an aperture 13 is placed in the area where the thin plate 14 is provided, and a diaphragm 16 made of an elastic metal plate formed on a spherical surface is placed in the aperture 13 of this thin plate 14.
This is covered with an elastic film 16 that is printed and laminated with an adhesive layer on one side, and on top of this, a protrusion is provided at the center of the elastic body that is held in the opening 13 of the thin plate 14 and has a thin section. A display board 18 is arranged on the top surface of the thin plate 14, and as shown in FIG. By flexing and moving the central protrusion through the thin wall portion, the film 16 and diaphragm 15 are flexed to establish electrical continuity between the contacts 11, thereby switching the switch. When the pressing force from the fingertip is released, the diaphragm 15, film 16, and button part 1
Since the pushbutton switch of the embodiment of the present invention is constructed in such a manner that the button part 17 moves upward and returns due to the elasticity of the thin-walled part 7, the cost can be reduced by reducing the number of molded parts, and the button part 17 can be moved downwardly. By storing the diaphragm 15, it is possible to reduce the thickness and prevent the diaphragm 15 from deforming under unusual operations.

Effects of the Invention As described above, according to the present invention, by forming a button structure in which a protrusion is provided in the center of an elastic body having a thin plate and a thin wall portion formed by punching, the molded part is only the button portion. Because of this, it is easy to reduce mold costs and parts costs.The diaphragm can be stored under the button section, making it thinner, and there is no button section, so the diaphragm contacts can be operated directly on the display board. There is no deformation of the diaphragm that occurs when the diaphragm is operated, and even in unusual operating methods, not only is no abnormal force applied to the diaphragm, but also stable conduction can be achieved and the switch can be switched.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the pushbutton switch of the present invention, FIG. 2 is a sectional view showing the same pushbutton switch during operation, and FIG. 3 is a sectional view showing a conventional pushbutton switch. Figure 4 is a sectional view showing the operation of the same push button switch, Figure 5
The figure is a sectional view showing another conventional pushbutton switch. 11...Contact, 12...Insulating substrate, 1
3...Open hole, 14...Thin plate, 15...
...Diaphragm, 16...Film, 1
7...button, 18...display board. Name of agent: Patent attorney Toshio Nakao and 1 other person f3
-7J/l㇠f4-jun °nuclear f5---η゛Iafura 4r-m-film Fig. 2

Claims (1)

[Claims] A thin plate having an opening is placed on an insulating substrate having a conductive pattern, and a diaphragm made of a spherical elastic metal plate is placed in the opening of the thin plate so as to face the conductive pattern. An elastic film is placed on top of the elastic body, which is held in the opening of the thin plate, and the lower surfaces of both ends of the elastic body provided with a thin wall are in contact with the insulating substrate through the film, and a protrusion is provided in the center. A push-button switch comprising: a display board arranged so as to close an opening in the thin plate, and a button which is moved downward by bending a protrusion in the center by the thin wall part;