JPH0555427U - Two-step operation switch rubber contact - Google Patents

Abstract

(57) [Summary] [Purpose] The first rubber contact of the two-stage operation switch.
A hole is formed in the skirt to make the restoring force of the first skirt relatively weak and to stabilize the switch operation. [Structure] The rubber contact 1 is formed with a first skirt portion 1f that bends when the first step is operated. First
Holes 1g and 1h are formed in the skirt portion 1f. The rib 1d is formed inside the first skirt portion 1f. Rib 1d
The first movable contact 3 that comes into contact with the first fixed contact 7 when the first skirt portion 1f is bent is provided below. Rib 1d
A second skirt portion 1c that bends when the second stage operation is performed is formed inside. A pressing operation portion 1a that abuts the knob 2 is formed inside the second skirt portion 1c. A second movable contact 4 that contacts the second fixed contact 8 when the second skirt portion 1c is bent is provided below the pressing operation portion 1a.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a two-stage operation switch rubber contact in which a hole is formed in a first skirt portion of a rubber contact that is bent when the first-stage operation is performed.

[0002]

[Prior Art]

 Conventionally, as a technique of this type, for example, there is a switch disclosed in Japanese Utility Model Laid-Open No. 1-92042. In the switch, the first switch leg portion of the rubber contact bends and the second movable contact comes into contact with the fixed contact by the first step operation. In the switch, the second switch leg portion of the rubber contact is further bent by the operation of the second stage, and the first movable contact comes into contact with the fixed contact.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional switch, when the first step operation is performed, most of the operating force of pressing the key button is concentrated on the second movable contact. When the switch is operated in the second step, most of the operating force for pressing the key button is concentrated on the first movable contact disposed in the lower center part of the key button. In this way, when the switch is operated from the first stage operation to the second stage operation, the position where the operation force of pressing the key button is concentrated is from the second movable contact to the first movable contact. Move to. Then, the pressing force with which the second movable contact presses the fixed contact decreases. Therefore, when the pressing operation of the second stage is performed, the restoring force of the first switch leg portion of the second movable contact is relatively improved due to the decrease of the pressing force, and the switch is in the original OFF state. This may cause contact failure of the contacts.

[0004]

[Means for Solving the Problems]

 In the rubber contact of the two-step operation switch according to the present invention, the first skirt portion is bent and the first movable contact comes into contact with the first fixed contact by the first step operation. The second skirt portion is bent and the second movable contact comes into contact with the second fixed contact to close it. By forming a hole in the first skirt portion of the rubber contact of the two-stage operation switch, the movable contact This is to improve the switch operation.

[0005]

【Example】

 An embodiment of the rubber contact of the two-step operation switch according to the present invention will be described in detail below with reference to FIGS. 1, 2 and 3.

Reference numeral 1 is a rubber contact arranged below the knob 2. The rubber contact 1 is placed on a flexible sheet 5 having a first movable contact 3 and a second movable contact 4. Reference numeral 1a is a pressing operation portion formed on the central top of the rubber contact 1. The pressing operation portion 1a may be formed integrally with the knob 2. A second pressing portion 1b for pressing the upper surface of the flexible sheet 5 to which the second movable contact 4 is fixed is formed on the lower surface of the pressing operation portion 1a. A second skirt portion 1c is formed on the peripheral portion of the pressing operation portion 1a.

A rib 1d is formed on the peripheral portion of the second skirt portion 1c. On the lower surface of the rib 1d, a first pressing portion 1e for pressing the upper surface of the flexible sheet 5 to which the first movable contact 3 is fixed is formed. A first skirt portion 1f is formed around the rib 1d.

The first skirt portion 1f has holes 1g and 1h facing each other. The holes 1g and 1h are long holes oriented in a direction perpendicular to the inclination direction of the first skirt portion 1f, or slits cut with a knife or the like. The holes 1g and 1h allow the first skirt portion 1f to bend with a comparatively weak operating force when the knob 2 is pressed, and allow the air in the substantially skirt-shaped switch operating portion 1j to move in and out. It is for ventilation. A rib 1i is formed on the peripheral portion of the first skirt portion 1f.

The rib 1 i is placed on the flexible sheet 5. A desired number of switch actuating portions 1j are installed and are continuously connected by ribs 1i. The knob 2 is of a push button type or a seesaw type. A substrate 6 has a first fixed contact 7 that contacts the first movable contact 3 and a second fixed contact 8 that contacts the second movable contact 4. Reference numeral 9 is an intermediate material interposed between the flexible sheet 5 and the substrate 6.

In the present invention, the flexible sheet 5 and the intermediate member 9 described above are removed, the first movable contact point 3 is installed on the first pressing portion 1e, and the second movable contact 4 is set on the second pressing portion 1b. It may be installed in.

The rubber contact of the two-step operation switch according to the present invention has the above-mentioned structure, and its operation will be described in detail below.

The switch actuating portion 1j of the rubber contact 1 is normally in the switch OFF state shown in FIGS. 1, 2 and 3.

The knob 2 is pressed at the first stage. The knob 2 presses the pressing operation portion 1a of the rubber contact 1, and the first skirt portion 1f bends. Since the first skirt portion 1f is provided with the holes 1g and 1h, the first skirt portion 1f is easily bent, the strength of the first skirt portion 1f is reduced, and the first movable contact 3 is switched on even if the operating force of the knob 2 is small. To do. Further, at this time, the air in the switch operating portion 1j flows out of the switch operating portion 1j through the holes 1g and 1h, so that the first skirt portion 1f can be smoothly bent. Then, the rib 1d descends, and the first pressing portion 1e presses the flexible sheet 5. The flexible sheet 5 is curved by being pressed by the first pressing portion 1e, the first movable contact 3 comes into contact with the first fixed contact point 7, and the switch is turned on. At the time of the operation of the first step, the operating force with which the knob 2 presses the pressing operation portion 1a includes a force for bending the first skirt portion 1f and a pressing force for bending the flexible sheet 5 by the first pressing portion 1e. It is a synthetic force with pressure.

Further, the knob 2 is pressed to perform the second-stage pressing operation. The knob 2 presses the pressing operation portion 1a, and the second pressing portion 1b descends. Along with this, the second skirt portion 1c bends. At this time, the air in the switch operating portion 1j flows out of the switch operating portion 1j through the holes 1g and 1h, so that the second skirt portion 1c is smoothly bent. The second pressing portion 1b descends and presses the flexible sheet 5, the second movable contact 4 comes into contact with the second fixed contact 8, and the switch is turned on.

At the time of the second stage operation, most of the operating force with which the knob 2 presses the pressing operation portion 1 a is the pressing force with which the pressing operation portion 1 a presses the flexible sheet 5. By forming the holes 1g and 1h in the first skirt portion 1f, the first skirt portion 1f is bent even with a relatively weak force, the restoring force is small, and the bent state is maintained. Therefore, when the knob 2 is pressed in the second step, the first pressing portion 1e presses the flexible sheet 5, and the second and first movable contacts 4 and 3 move to the second and first positions. The fixed contacts 8 and 7 are kept in contact.

When the pressed hand is released, the knob 2 and the rubber contact 1 return to the original OFF state by the restoring force of the first skirt portion 1f and the second skirt portion 1c. The first movable contact 3 and the second movable contact 4 are separated from the first fixed contact 7 and the second fixed contact 8 by the restoring force of the flexible sheet 5, and are switched off.

[0017]

[Effect of the device]

 In the rubber contact of the two-step operation switch according to the present invention, the first skirt portion is bent with a comparatively weak operation force because the first skirt portion has a hole. Therefore, according to the present invention, when the second stage operation is performed, the restoring force of the first skirt portion can be set to be relatively weak, so that the first movable contact does not unexpectedly separate from the first fixed contact. It is possible to provide stable switch quality and provide switch rubber contacts with excellent functionality.

[Brief description of drawings]

FIG. 1 is a bottom view showing an embodiment of a rubber contact of the present invention.

FIG. 2 is a central longitudinal sectional view showing an embodiment of the present invention.

FIG. 3 is a perspective view with a partial cross section showing an embodiment of the rubber contact of the present invention.

[Explanation of symbols]

 1 Rubber Contact 1c Second Skirt Part 1f First Skirt Part 1g, 1h Hole 2 Knob 3 First Moving Contact 4 Second Moving Contact 5 Flexible Sheet 7 First Fixed Contact 8 Second Fixed Contact

Claims (1)

[Scope of utility model registration request] 1. The operation of the first step causes the first skirt portion to bend and the first movable contact to contact the first fixed contact, and the operation of the second step causes the second skirt portion to bend. In the rubber contact of the two-stage operation switch in which the second movable contact comes into contact with the second fixed contact to close it, a hole is formed in the first skirt portion.
Rubber contact for the step switch.