JPH05325711A - Diaphragm to be used for switch - Google Patents

Abstract

PURPOSE:To provide a diaphragm allowing a big operation stroke in relation to a diaphragm to be used for a small-sized push switch to be used for various kinds of electronic apparatus. CONSTITUTION:When a diaphragm 11 is pressed by radially providing the recessed or projected grooves 11b from the central part toward the periphery of the doughnut-shaped diaphragm 11 having elasticity, these grooves 11b firstly move the periphery in the extending direction and the central part in the contracting direction respectively in order to obtain a large operation stroke.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm used in a switch used in various electronic devices.

[0002]

2. Description of the Related Art A diaphragm used in a conventional switch will be described with reference to push switches shown in FIGS. 8 (a) to 8 (c).

According to FIG. 1, reference numeral 5 is a wiring board provided with a C-shaped electrode 2 and a contact 3 at the center thereof. This wiring board 5
The contact piece 1 arranged corresponding to is formed into a circular dome shape and is generally called a diaphragm (hereinafter, the contact piece 1 is referred to as a diaphragm), and the center part of the dome is pushed. Thus, while having a click feeling, it conducts to the central contact electrode 3 and turns on between the C-shaped electrode 2 and the contact 3. In addition, 4 is an insulating sheet for insulating the lead portion of the contact point 3 from the contact piece 1.

[0004]

However, the above-mentioned conventional contact piece has a small moving stroke (S), and a large diameter is required to obtain a large moving stroke.
It was not suitable for places requiring a long operation stroke. The present invention solves such conventional problems, and an object thereof is to obtain a long operation stroke and a good click feeling in a small space.

[0005]

In order to solve the above-mentioned problems, the diaphragm used in the switch of the present invention is provided with radially concave or convex grooves from the central portion toward the outer periphery.

[0006]

With the above-mentioned structure, when the diaphragm is pressed, when it is pressed by this concave or convex groove, the diaphragm first expands the outer circumference and contracts the central part, and the operation stroke is larger than the conventional diaphragm. Is what you can do.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A diaphragm used for a switch according to an embodiment of the present invention is set according to FIGS.

As shown in FIG. 1, 11 is a diaphragm which serves as a contact piece having elasticity, 11a is a hole provided at the center, and 11b is a plurality of holes radially formed from the center of the hole 11a toward the outer periphery. It is a concave groove. Reference numeral 12 is a C-shaped electrode, 13 is a contact provided in the central portion, and 15 is a wiring board forming the C-shaped electrode 12 and the contact 13.

Next, the movement of the diaphragm 11 will be described. First, as shown in FIG.
2 is pushed by the force of P, the groove 11b becomes
As in the above, the central portion of the hole 11a contracts in the A direction and the outer peripheral portion extends in the B direction. By further pressing, the contact point 13 and the C-shaped electrode 12 are electrically connected by the diaphragm 11 as shown in FIG.

As described above, when the diaphragm 11 is pressed, first, the central portion contracts in the A direction and the outer peripheral portion extends in the B direction, so that the operation stroke at the time of switching can be increased by the operation stroke required for this. is there.

In the above embodiment, since the hole is provided at the center of the diaphragm 11, it is possible to avoid the stress concentration on the central part which occurs during the operation, so that the diaphragm can be smoothly inverted and the inverted state. Although the life can be extended, even if the diaphragm 11 is only provided with the groove 11b as shown in FIG. 6, the operation stroke can be increased, so that it is not particularly necessary to extend the life. Is useful.

3 to 5B show another embodiment of the diaphragm used in the switch of the present invention.
Explaining only the parts different from the embodiment of FIG. 1, FIG. 3 shows that four radial concave grooves 11c are provided from the central part to the outer circumference, and FIG. 4 shows a radial convex groove from the central part to the outer circumference. 4 grooves 11d are provided, as shown in FIG.
(B) is an uneven groove 11E, 1 from the central part toward the outer periphery.
1F is provided in a spiral shape, as shown in FIGS. 7 (a) and 7 (b).
Is an uneven groove 11G, 11H extending from the center to the outer periphery.

The diaphragm used in the switch of the present invention can be modified in various other ways. The outer shape may be polygonal as well as circular, and the shape and depth of the concave and convex grooves can be appropriately selected according to the operation feeling and the required operation stroke.

[0014]

As described above, according to the present invention, by providing a radial concave or convex groove from the central portion of the diaphragm used for the switch to the outer periphery, the diaphragm can be operated without increasing the shape of the diaphragm. Since the stroke can be increased, it contributes to downsizing of the switch.

[Brief description of drawings]

FIG. 1A is a side view showing the principle of a switch incorporating a diaphragm used in a switch which is an embodiment of the present invention. FIG. 1B is a side view showing the same switching state.

FIG. 2 is a perspective view illustrating a pressed state of the diaphragm.

FIG. 3 is a perspective view of another embodiment of the diaphragm of the switch of the present invention.

FIG. 4 is a perspective view of another embodiment of the diaphragm of the switch used in the present invention.

5A and 5B are perspective views of another embodiment of the diaphragm used in the switch of the present invention.

FIG. 6 is a perspective view of another embodiment of the diaphragm used in the switch of the present invention.

7 (a) and 7 (b) are plan views of another embodiment of the diaphragm used in the switch of the present invention.

FIG. 8A is an exploded perspective view of a switch incorporating a conventional diaphragm. FIG. 8B is a side sectional view of the same. FIG. 8C is a side sectional view of the same switching state.

[Explanation of symbols]

 11 diaphragm 11a hole 11b groove

Claims (2)

[Claims] 1. A diaphragm for use in a switch, characterized in that at least one groove having a concave or convex shape is provided radially from the central portion toward the outer periphery. 2. A diaphragm used in a switch, characterized in that a hole is provided at the center and at least one groove is provided radially or radially from the center of the hole toward the outer periphery.