JPH04111118U - panel switch - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a panel switch used in data input devices for office automation equipment and video/audio equipment.
In particular, the purpose is to reduce switching noise. [Structure] Fixed contact 21 formed on printed circuit board 22
A membrane switch 26 is constructed by providing a movable contact 23 on an elastic insulating sheet 24 via a spacer 25, and a damper sheet 27 is provided between the membrane switch 26 and a diaphragm 28 that drives the membrane switch 26 to reduce switching noise. The aim is to

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a panel switch used for data input devices of OA equipment and video/audio equipment. It is related to.

0002

[Conventional technology]

A conventional panel switch will be explained with reference to FIGS. 5(a) and 5(b).

0003 According to the figure, the panel switch is mounted on a printed circuit board 2 having fixed contacts 1. An elastic insulating sheet 4 having a movable contact 3 is connected to the fixed contact 1 via a spacer 5. A membrane switch 6, which is a switch part, is configured such that the moving contacts 3 face each other. A diaphragm 7 that generates a sense of moderation is placed on top of this, and a rod 8 is placed on top of this. The panel 9 is held by a case 10 having a button opening. I was in high spirits.

0004 Next, to explain the operation, when button 9 is pressed in the state shown in Figure 5(a), The rod 8 pushes down the diaphragm 7, and as shown in FIG. The switch 7 is reversed, and the fixed contact 1 and the movable contact 3 are electrically connected and switching is performed. Ru. Moreover, when the pressing force of the button 9 is removed, the original state is restored due to the return force of the diaphragm 7. It was supposed to return to .

[0005]

[Problem that the idea aims to solve]

However, in the above configuration, the impact applied to the button 9 is transmitted through the rod 8. is connected to the diaphragm 7, and is further connected to the printed circuit board 2 via the elastic insulation sheet 4. Because it is directly applied to the However, there were problems such as this impact sound being recorded.

[0006] This invention solves these problems by creating a sound-muffling panel switch that produces less impact noise. The purpose is to provide a

[0007]

[Means to solve the problem]

In order to solve the above problems, this invention uses a damper between the diaphragm and the switch section. or provide at least one of the fixed contacts and movable contacts with conductive buffer material. or conductive buffer material on at least one of the fixed contact and the movable contact. It is printed with a damper.

[0008]

[Effect]

With the above configuration, the present invention allows the shock applied to the button to be printed via the damper. Since the shock generated during switching is applied to the main board, the shock generated during switching is alleviated by the damper and It is possible to reduce impact noise during switching.

[0009]

【Example】

A panel switch according to an embodiment of the present invention will be explained below with reference to FIGS. 1(a) and 1(b).

0010 According to the figure, the panel switch is mounted on a printed circuit board 22 having fixed contacts 21. 50-100 micron thick elastic material such as polyester having a movable contact 23. The fixed contact 21 and the movable contact 23 face each other through an insulating sheet 24 with a spacer 25 in between. By holding the membrane switch 26 as a switch part, On top of this, various rubbers such as silicone rubber with a hardness of 30 to 80 degrees, and foam materials are applied. A damper sheet 27 made of stainless steel or phosphor bronze for springs is sandwiched between the A diaphragm 28 is arranged to generate a sense of moderation and is made of a metal with spring properties such as A button 30 with a rod 29 integrated thereon is placed on the case having a button opening. It is held by a base 31 to constitute a panel switch.

[0011] Next, to explain the operation, when the button 30 is pressed in the state shown in Figure 1(a), As a result, the rod 29 pushes down the damper seat 27 via the diaphragm 28, As shown in FIG. 1(b), the diaphragm 28 is inverted, and the movable contact 23 and the fixed contact 2 1 comes into contact, electrical conduction occurs and switching of the switch is performed. At this time, the impact force from the button 30 is alleviated by the damper sheet 27. next , when the pressing force of the button 30 is removed, the original state is restored by the return force of the diaphragm 28. I'll have to go home.

0012 Figures 2(a) and 2(b) show other embodiments of the panel switch of the present invention, with fixed contacts An elastic insulating sheet 4 having movable contacts 43 is placed on a printed circuit board 42 having 41 4 so that the fixed contact 41 and the movable contact 43 face each other with a spacer 45 in between. By holding the membrane switch 46, the elastic insulating sheet 4 A damper 47 is formed by printing a cushioning material such as silicone rubber on the back side of the movable contact 43 of No. 4. A diaphragm 48 that generates a sense of moderation is formed on the diaphragm 48 and an adhesive material 49 is applied on one side. A button 52 is fixed with a tape 50 and a rod 51 is integrally formed on the button 52. It is held by a case 53 having a button opening, and a plurality of these switches are integrated. The damper 47 makes up the panel switch. This is to reduce impact noise when the tongue 52 is pressed down.

[0013] Note that the operation is the same as that of the embodiments shown in Figures 1(a) and (b), so the explanation will be omitted. Omitted.

[0014] FIG. 3 shows another embodiment of the panel switch of the present invention. A rigid structure in which the damper 62 is formed by printing a conductive cushioning material such as conductive silicone rubber. A conductive film is placed on the wiring pattern 65 on the printed circuit board 64 having the constant contacts 63. A movable contact 6 having a structure in which a damper 66 is formed by printing a conductive buffer material such as silicone rubber. 7 is connected to the fixed contact 63 via a spacer 69. The membrane switch 70 is constructed by holding the moving contacts 67 facing each other. On top of this, a diaphragm 71 that generates a sense of moderation is coated with an adhesive material 72 on one side. A button 75 with a rod 74 integrated thereon is pasted with tape 73. It is held by a case 76 having a tongue opening, and the dampers 62, 66 This reduces the impact force when the button 75 is pressed.

[0015] Note that the operation is the same as that of the embodiments shown in Figures 1(a) and (b), so the explanation will be omitted. Omitted.

[0016] FIG. 4 also shows another embodiment of the panel switch of the present invention. A dome is formed by printing a conductive cushioning material such as conductive silicone rubber so as to cover the conductive ring 81. Conductive material covers the nut-shaped contact 82 and the pattern 83 adjacent to the inside thereof. A circular contact 84 is printed and formed from a conductive cushioning material such as silicone rubber, and a sticker is placed on top of the circular contact 84. A roughly dish-shaped diaphragm made of a metal with spring properties such as phosphor bronze for springs or springs. A tape 87 coated with an adhesive material 86 on one side is used to connect the contact 85 to the approximately donut-shaped contact 82. The center of the diaphragm 85 is held on a concentric circle and in contact with the center of the diaphragm 85. A rod 89 that moves up and down by operating the button 88 is arranged so as to face the part. It is configured as a flannel switch, and has a donut-shaped contact 82 and a circular contact 84. The conductor cushioning material is used as a damper to reduce the impact force during switching. It is.

[0017]

[Effect of the idea]

As mentioned above, since the impact applied to the button is applied to the board via the damper, The shock generated during switching is alleviated by the damper, reducing switching noise. It is possible to provide a sound-muffling type panel switch with less impact noise. It is of great practical value.

[Brief explanation of drawings]

FIG. 1: (a) Side sectional view of a panel switch that is an embodiment of the present invention; (b) Side sectional view showing the same switching state.

[Fig. 2] (a) Side sectional view of a panel switch according to another embodiment of the present invention; (b) Side sectional view showing the same switching state.

[Fig. 3] Side sectional view of a panel switch that is another embodiment of the present invention.

[Fig. 4] Side sectional view of a panel switch that is another embodiment of the present invention.

[Figure 5] (a) Side sectional view of a conventional panel switch (b) Side sectional view showing the same switching state

[Explanation of symbols]

21 Fixed contact 23 Movable contact 27 Damper seat

Claims (3)

[Scope of utility model registration request] 1. A panel switch characterized in that a damper is provided at least between a diaphragm and a switch section. 2. A panel switch characterized in that at least a diaphragm and either one of a fixed contact or a movable contact provided opposite to each other and driven by the diaphragm are formed of a conductive cushioning material such as silicone rubber. 3. A panel switch characterized in that at least a diaphragm and either one of a fixed contact and a movable contact that are provided facing each other and are driven by the diaphragm are covered with a conductive cushioning material such as silicone rubber. .