JPH03214521A - Bipolar single throw tactile switch - Google Patents

Abstract

PURPOSE:To obtain a metallic, crisp and clicking feeling by moving both of a movable point and a tactile plate almost at the same time to change over a circuit configuration of two circuits and one contact. CONSTITUTION:When a presser 30 is pressed, a tactile plate 50 is pressed down and at the same time a movable contact member 40 is also moved downward, and the tactile plate 50, when continuously pressed down, is turned over and moved into contact with the second fixed contact 65. The contact causes terminals 1, 2, and 5, 6 to be closed to form one circuit, and at the same time two contact, 42a, 42b, of the contact portions of the movable contact member 40 with the first fixed contact pair 61 causes the terminals 3, 4 to be closed to form another circuit. In this way, a circuit configuration of two circuits and one contact is realized to bring a metallic, crisp and clicking feeling.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a double-pole single-throw tactile switch, particularly a double-pole single-throw tactile switch.
This invention relates to a double-pole single-throw tactile switch that has a circuit configuration with one contact and can provide a reliable click feeling.

[Prior Art] As shown in FIG. 6, this type of switch having a circuit configuration of two circuits and one contact has two circuits (a) and (a).
, b are arranged in a plane and the switching is performed by a rubber contact switch S shown in FIG. 6, (c), or a configuration is known in which the switching is performed by a membrane switch MS as shown in FIG. 7.

[Problems to be Solved by the Invention] However, in the conventional technology as described above, the circuit configuration of two circuits and one contact arranged on a plane is switched by two movable contacts, so it is difficult to miniaturize the circuit. . Moreover, since the switch is made of an elastic material such as rubber or resin, it is difficult to obtain a sharp click feeling when changing the switch.

Therefore, an object of the present invention is to provide a double-pole single-throw tactile switch that can have a circuit configuration of two circuits and one contact by switching the contacts once, and can provide a metallic and light click feeling. be.

[Means for Solving the Problems] According to the present invention, in a double-pole single-throw tactile switch that opens and closes the first and second fixed contact pairs by the movement of one pusher, the pusher has an intermediate portion. The first fixed contact pair includes a held movable contact member and a tact plate whose center portion faces the end portion of the presser in the moving direction, and the first fixed contact pair faces both ends of the movable contact member, and the tact plate The movable contact member is brought into contact with and separated from both ends of the movable contact member according to the movement of the movable contact member, and one of the fixed contacts of the second fixed contact pair is in contact with the peripheral portion of the tact plate, and the second fixed contact A double-pole single-throw tactile switch is obtained, wherein the other fixed contact of the pair faces the center of the tact plate and moves toward and away from the tact plate as the presser moves.

[Function] At the same time as a curved movable contact member movably attached to the tip of the presser is brought into contact with the first pair of fixed contacts, the contact member is disposed between the tip of the presser and the second fixed contact member, The tact plate, which is always in contact between one second fixed contact, contacts the other second fixed contact, thereby forming a two-circuit, one-contact circuit.

[Example 1] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view showing when the contacts are switched, FIG. 3 is a plan view showing the connection of the contacts, and FIG. It is a switching circuit diagram.

This double-pole single-throw tactile switch has a box-shaped housing 10, a case 20 that covers the upper opening 11 of the housing 1o, and a hollow portion 12 defined by the housing 1o and the case 20.

A first fixed contact pair 61 and a second fixed contact pair 64,65 are arranged in the inner bottom 13 of the hollow portion 12. That is, the first fixed contact pair 61 is opened and closed by the movement of one presser 30 movably attached inside the hollow portion 12 . A movable contact member 40 whose intermediate portion is held in this presser 30
is provided. A tact plate 50 is provided at the end of the presser 30 in the moving direction, with the center facing each other. The first fixed contact pair 61 faces both ends of the movable contact member 40, and the movable contact member 40 moves as the presser 30 moves.
It connects and separates from both ends of the .

The second fixed contact pair 64.65 is the first fixed contact pair 61.
It is located inside. Second fixed contact pair 6.4.6
5, one fixed contact 64 is in contact with the periphery of the tact plate 50. Of the second fixed contact pair 64.65,
The other fixed contact 65 faces the center of the tact plate 50,
As the presser 30 moves, it approaches and separates from the tact plate 50.

A mounting hole 21 for the presser 3o is formed in the upper part of the case 20.

The presser 30 is connected to the operation surface 3 exposed from the mounting hole 21.
1 and a protrusion 32 for engaging the attachment hole 21 is formed on the periphery thereof, and a protrusion 33 protruding toward the hollow portion 12 is provided. An attachment portion 35 of the movable contact member 4o is attached to an axially intermediate portion of the protrusion 33. The movable contact member 4o is formed by curving an elongated metal plate, and has a mounting hole 41 to the mounting portion 35 formed at the top. Twin contact portions 42a and 42b are provided at both ends of the movable contact member 40. These twin contact portions 42a and 42b improve contact performance.

The tact plate 50 has a dish shape, and has its top portion in contact with the tip of the presser 30 and its periphery in contact with one of the opposing second fixed contacts 64 .

The second fixed contact pair 64 , 65 is arranged on the upper surface of the inner bottom 13 of the housing 10 .

Next, the operation of this tactile switch will be explained.

As shown in FIG. 2, when the presser 30 is pressed, the tact plate 5
0 is pushed down, and at the same time, the movable contact member 40 also moves downward. If the pressing is continued, the tact plate 50 will be reversed at point a in the graph shown in FIG. 5, moved to point b, and comes into contact with the second fixed contact 65. Through this contact,
Terminals 1, 2 and 5, 6 in FIG. 4 are closed to form one circuit. At the same time, the two contact parts 42a and 42b of the contact part 42 of the movable contact member 40 contact the first fixed contact pair 61, and the fifth
Terminals 3 and 4 shown in the figure are closed to form one circuit.

In the graph, δ4 is the amount of movement of the tact plate 50, δ8 is the contact gap, and δC is the overtravel.

[Effects] Since the present invention has the above-mentioned configuration, by operating the presser, both the movable contact and the tact plate are moved almost simultaneously, and the circuit configuration of two circuits and one contact is switched. It is possible to obtain a double-pole, single-throw type tactile switch that can provide a light click feeling and can be miniaturized.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view showing the contact switching, Fig. 3 is a plan view showing the connection of the contacts, Fig. 4 is a switching circuit diagram, Fig. 5 is a graph showing the relationship between the amount of movement of the tact plate and the load, and Fig. 6 shows a conventional switch mechanism. , a sectional view showing a changeover switch, and FIG. 7 is a sectional view showing another conventional switch mechanism. 10; Housing, 11; Opening, 12; Hollow part, 13;
Bottom, 20; Case, 30; Presser, 40; Movable contact member, 50; Tact plate, 61; First fixed contact pair, 64,
65. Second fixed contact pair. Figure 2 Figure 3 Figure 6

Claims (1)

[Claims] 1. A double-pole single-throw tactile switch that opens and closes a pair of fixed contacts by the movement of one pusher, a movable contact member whose intermediate portion is held by the pusher, and a moving direction of the pusher. a tact plate having a central portion facing each other at each end, the first fixed contact pair facing each end of the movable contact member and coming into contact with and separating from both ends of the movable contact member as the presser moves. and the second
One fixed contact of the pair of fixed contacts is in contact with the peripheral part of the tact plate, and the other fixed contact of the second pair of fixed contacts faces the center part of the tact plate and is in contact with the periphery of the tact plate. A double-pole single-throw type tactile switch, characterized in that it comes into contact with and separates from the tactile plate as it moves.