JPS60112212A - Pushbutton 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 push button switches used in small keyboards.

Conventional Structures and Their Problems In recent years, push button switches used in small keyboards have been required to be thin and easy to assemble.

A conventional push button switch of this kind is shown in FIG. A diaphragm 5 made of a spherical elastic metal plate is placed on the diaphragm 5, and an elastic sheet 6 is placed on top of the diaphragm 5.
A push button 9 held in a hole 8 of a frame 7 was arranged thereon.

With this configuration, by moving the push button 9 downward with your fingertip, the seat 6,
The switch was switched by bending the diaphragm 6 to establish continuity between the contacts 1.

However, when carrying around the keyboard or operating it at hand, there is a play (gap) between push button 9 and frame 7.
This caused a rattling noise, which was detrimental to the product's value. In addition, since the sheet 6 is placed over the diaphragm 6, there is a problem that the click feeling of the diaphragm 6 is reduced, resulting in a poor operating feel. To provide a push-button switch which eliminates the noise of force clattering when shaking the keyboard body and provides an excellent operating feeling when pressing the push-buttons.

Structure of the Invention In order to achieve the above-mentioned object, the push button switch of the present invention is provided by disposing a spacer having an opening at a position corresponding to the contact on an insulating substrate provided with a contact, and placing a spacer in the opening. A diaphragm made of spherical metal is housed, and an elastic sheet with a spherical bulge projecting upward is attached to the spacer in a portion corresponding to the opening, and the elastic sheet corresponds to the opening in the elastic sheet. A push button fitted into the window hole of the frame is arranged at the top, and the lower surface of the push button is brought into contact with the bulge.

With this configuration, the elastic sheet provided with the spherical bulge eliminates noise generated when the keyboard body is used, and at the same time provides an excellent operating feel when pressing the push buttons.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows the structure of a push button switch in an embodiment C/ζ of the present invention.

11 is an insulating substrate having contacts 12, and this insulating substrate 11
A spacer 14 having an opening 13 is placed on the part where the contact 12 is provided, and a null tire 77mm 16 is placed in the opening 13 of the spacer 14 from an elastic metal plate formed in a spherical shape. A portion of the spacer 14 corresponding to the opening 13 is covered with an elastic sheet 1 having a spherical bulge 16 projecting upward, and a button 2o held in the hole 19 of the frame 18 is placed on top of the bulge 16. It is configured by arranging.

The operation of the push button switch constructed as described above will be explained below.

First, the push button 2o is pressed with a fingertip, and the downward movement of the push button 2o causes the elastic sheet 17 and the diaphragm 15 to sag, causing conduction between the contacts 12 and switching the switch. Also, when the pressing force from the fingertip is released, the diaphragm 15 and the elastic sheet 170 elastically press the button 2.
o returns to upward motion.

Since the push button switch of the embodiment is constructed as described above, by providing the elastic sheet 17 provided with the protruding spherical bulge 16, the push button 20 and the frame 8 #
18, thereby preventing the occurrence of rattling noise, and since the spherical bulge 16 made of an elastic sheet is provided, the operation feeling is improved. Alternatively, since the conventional elastic sheet 17 is simply molded and the spherical bulge 16 is provided, the above-mentioned effects can be easily achieved without adding any parts, and an inexpensive push button pad can be provided.

Effects of the Invention As described above, according to the present invention, by providing an elastic sheet with a protruding spherical bulge, it is possible to prevent noise caused by rattling of the push button and provide a push button switch with an excellent operating feel. I can do it.

In addition, since the elastic sheet is simply provided with a spherical molded portion, there is no need to add any additional parts, and it can be provided at low cost, which has great practical value.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a conventional push-button switch, and a cross-sectional view showing an enlarged view of the first button. 11...Insulating substrate, 12...Contact, 1
3...Opening hole, 14...Spacer, 15
・・・・Diaphragm, 16・River・・Bulge part,
17...Elastic sheet, 18...Frame, 19...Hole, 20...Push button. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] On an insulating substrate with contacts, an elastic sheet is mounted on a spacer at a position corresponding to the contact and has a spherical bulge protruding above the part corresponding to the opening, and the opening of the elastic sheet is A push button switch has a push button fitted into a window hole in a frame on the corresponding upper part.