JPH0640459B2 - Push button switch - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel type push button switch used in an operation panel section of an electronic device.

2. Description of the Related Art In recent years, as electronic devices have been increasingly digitized, push-button switches used in the operation panel of devices are required to be thin and easy to assemble flat panel type.
For example, the structure is as shown in FIG. That is, as shown in the same figure, a spacer 4 having an opening 3 is arranged on an insulating substrate 2 having a contact 1, where the contact 3 is provided.
A diaphragm 5 made of an elastic metal plate formed in a spherical shape is arranged in the opening 3 of the spacer 4, a film 6 having elasticity is covered on the diaphragm 5, and the diaphragm 5 is held by the hole 8 of the case 7 thereon. The button part 9 is arranged, and the display plate 10 is arranged on the upper surface of the case 7. With this structure, as shown in FIG. 4, the button part is pressed by pressing the display part of the display plate 10 with a fingertip. 9 is moved downward, the diaphragm 5 is bent, and the contacts 1 are electrically connected to each other to switch the switch. There is also a structure as shown in FIG. 6, and the operation is basically the above. That is, the operation is basically the above. That is, a spacer 4 having an opening 3 is arranged on an insulating substrate 2 having a conductive pattern, a diaphragm 5 made of an elastic metal plate formed in a spherical shape is arranged in the opening 3 of the spacer 4, and a spacer 5 is arranged thereon. The film 6 having elasticity is covered, and the display plate 10 is arranged thereon.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, when the thickness is reduced, there is a limit to the reduction in thickness due to the relationship between the minimum wall thickness of the button portion 9 and the case 7 during molding and the stroke of the diaphragm 5. However, the dimensional accuracy of the molded parts becomes stricter as the product becomes thinner, resulting in higher costs and deformation of the diaphragm.
This may cause poor recovery.

Therefore, the present invention is thinned by reducing the number of molded parts,
The present invention provides a push button switch that is low in price and can prevent deformation when the diaphragm operates.

Means for Solving the Problems In order to solve this problem, the present invention relates to a hole formed in a thin plate formed by punching, the lower surface of which is in contact with the insulating substrate for operating the switch portion, and the protrusion is provided at the central portion. The button portion of the resin molded product having the thin portion and the thin portion is fitted and the flexible display plate is attached to the upper surface.

The thin plate by punching is placed between the display board and the insulating board, the lower surface contacts the insulating board, and the button of the resin molded product that has the protrusion and the thin portion in the center allows you to perform special operations. Since the diaphragm contact is not deformed, it is possible to easily reduce the thickness and reduce the cost.

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

First, in the embodiment shown in FIG. 1, reference numeral 12 is an insulating substrate having a contact 11, and the contact 11 is provided on the insulating substrate 12.
A thin plate 14 made of a synthetic resin having an opening 13 is arranged in the portion where is provided, and a diaphragm 15 made of an elastic metal plate formed on a spherical surface is arranged in the opening 13 of the thin plate 14,
An adhesive layer is printed on one side of this and a laminated elastic film 16 is covered, and a protrusion is provided in the center of the elastic body that is held in the opening 13 of the thin plate 14 and has a thin portion. The button part 17 is arranged, and the display plate 18 is arranged on the upper surface of the thin plate 14. As shown in FIG. 2, the button part 17 is pushed through the display plate 18 with a fingertip, and the button part 17 is pressed. The thin portion bends the protrusion in the central portion and moves it downward to bend the film 16 and the diaphragm 15 so that the contacts 11 are electrically connected to each other so that the switches are switched. When the pressing force by the fingertip is released, the diaphragm 15, the film 16, the button portion 1
The elasticity of the thin portion 7 causes the button portion 17 to return upward.

Since the push button switch according to the embodiment of the present invention is constructed as described above, the cost is reduced by reducing the number of molded parts, the diaphragm 15 is made thinner by storing the diaphragm 15 under the button portion 17, and the diaphragm under a peculiar operation. The deformation of 15 can be prevented.

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 provided with a thin plate and a thin portion formed by punching, only the button part is formed. Therefore, not only mold cost and parts cost can be easily reduced, but also the diaphragm can be stored under the button to make it thinner, and it is possible to directly operate the diaphragm contact on the display plate without the button. There is no deformation of the diaphragm or the like that occurs, and not only an abnormal force is not applied to the diaphragm even by a peculiar operation method, but also stable conduction can be achieved and switching of the switch can be performed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the push button switch of the present invention, FIG. 2 is a sectional view showing the operation of the push button switch, and FIG. 3 is a sectional view showing a conventional push button switch. FIG. 4 is a sectional view showing the push button switch when it is operated,
FIG. 1 is a sectional view showing another conventional push button switch. 11 ... Contact, 12 ... Insulating substrate, 13 ... Open hole, 14
... thin plate, 15 ... diaphragm, 16 ... film,
17 ... Button, 18 ... Display board.

Claims (1)

[Claims] 1. A thin plate having an opening is arranged on an insulating substrate having a conductive pattern, and a diaphragm made of an elastic metal plate formed in a spherical shape in the opening of the thin plate is opposed to the conductive pattern. Arranged so as to cover the film with elasticity on it, is held in the aperture of the thin plate, the lower end of both ends of the elastic body provided with a thin portion through the film, contact the insulating substrate, A push button composed of a display plate which is provided with a protrusion in the central portion, a button for lowering the protrusion of the central portion by the thin portion is arranged, and which is arranged so as to close the opening of the thin plate. switch.