JPS63285828A - Push-button switch - Google Patents

Abstract

PURPOSE:To make the operational feeling excellent, to decrease the difference between the action force and the restoration force of an operating body, and to reduce the absolute value of the action force, by using two links pivoted and incorporated preliminarily to eliminate the sliding friction resistance remaining only a rotation friction resistance. CONSTITUTION:Two links 17 and 18 which are pivoted and incorporated preliminarily are set, and operated by depressing an operating body 15. The links 17 and 18 are rotated around a supporting point 17a and a supporting axis 18a. Since the supporting axis 18a is held by a receiver 11a of a case 11, a sliding body 13 is moved to the left. When the operating body 15 is depressed further, the whole members are in the moving condition, and the switching of contact is completed. When the depressing of the operating body 15 is stopped in such a condition, the operating body 15 is restored to the original position by the reaction of a coil spring 19. By such constitution, the assembling of the two links can be simplified, the operational feeling is made excellent, and the difference between the action force and the restoration force of the operating body, and the absolute value of the action force can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to push button switches used in various electronic devices.

BACKGROUND OF THE INVENTION Conventionally, this type of push button switch has had a configuration as shown in FIG. In FIG. 8, 1 is a case in which a fixed contact piece 2 is installed, 3 is a sliding body that houses a movable contact piece 4, 6 is an operating body having a convex portion 6a, and 6 is a case that is connected to the case 1 and is connected to the above-mentioned operation unit. A cover that guides the vertical movement of the body 6, 7 is the axis T
The cam is rotatably supported on the cover 6 by &, and has a movable end M and a movable end B, the movable end M abuts the convex portion 6 & of the operating body 6, and the movable end B contacts the sliding body It is in contact with the surface 3 & of 3. Reference numeral 8 denotes a coil spring that urges the sliding body 3 and returns the operating body 6 via the cam 7.

The operation of the push button switch configured as described above will be described below. In FIG. 8, when the operating body 5 is pressed down, the cam 7 is moved by the convex portion 6a of the operating body 6.
The cam 7 whose movable end B is biased rotates about the shaft 7a, and the slide body 3 is moved by the movable end B, thereby switching the contact points.

Problems to be Solved by the Invention However, in the above configuration, 1) the movable end B of the cam 7 rotates around the shaft 71L; Since sliding frictional resistance is generated between the surfaces 4 and 4, the operating feel of the operating body 6 deteriorates.

2) Due to the sliding frictional resistance, the difference between the operating force and the return force of the operating body 6 becomes large, and therefore it is difficult to reduce the absolute value of the operating force.

It had the following drawback.

The present invention aims to solve these problems.

Means for Solving the Problem In order to solve this problem, the present invention provides a case in which a fixed contact piece is installed, an operating body that can move up and down, a sliding body that houses a movable contact piece, and an operating body. a spring member for returning the , a link member which is formed integrally with a molded member, one end of which is rotatably supported on the sliding body, and the other end of which is biased by the operating body; and this link member. One end is pivotally supported approximately at the center of the link B, and the other end is pivotally supported by the case.

Function: With this configuration, only rotational frictional resistance is generated between the operating body, sliding body, link person, and link B, and almost no sliding frictional resistance is generated, resulting in an excellent operation feel and a reduction in the absolute value of the operating force. can be made smaller.

Embodiment FIG. 1 is an exploded perspective view of an embodiment of the push button switch of the present invention, and FIG. 2 is a cross-sectional view. In FIGS. 1 and 2, 11 is a case in which a fixed contact piece 12 is installed, 13 is a sliding body having a hole 13a for storing a movable contact piece 14 and holding a link member to be described later, and 15 is a case to be described later. 16 is a cover fixed to the case 11 and has a hole 161L for guiding the vertical movement of the operating body 15; 17 is a supporting end 1;
7& and a movable end 171) and a recess 170 approximately in the center, the supporting end 171L is pivotally supported by the hole 131L of the sliding body 13, and the movable end 17b abuts against the convex portion 16& of the operating body 15. ing. Reference numeral 18 denotes a link member having a fulcrum shaft 18& and a rotating shaft 18b, the fulcrum shaft 18& is supported by the receiving portion 11& of the case 11, and the rotating shaft 18b is supported by the concave portion 170 of the link member 17, As shown in FIGS. 6 and 7, the link A17 and the link B18 are integrally formed in advance at a connecting portion 17d.
9 is a coil springing link A17. which is held between the case 11 and the sliding body 13. Operation body 16 via Su/Li B1B
It has the function of restoring.

The operation of the push button switch configured as described above will be explained below with reference to FIGS. 3, 4, and 6. FIG. 3 shows the return state of the operating body 16. When the operating body 16 is pressed down in this state, the link person 17 rotates around the support end 171L as shown in FIG. rotates around the fulcrum shaft 182L. Here, the fulcrum shaft 18a is the receiving part 1 of the case 11.
1&, the sliding body 13 therefore moves in the direction of the arrow. When the operation body 16 is further pressed down, it becomes fully moved as shown in FIG. 5, and the contact switching is completed. Furthermore, if the push-down operation of the operating body 15 is canceled in this state, the reaction force of the coil spring 19 returns to the original state shown in FIG. 3.

Effects of the Invention As described above, according to the present invention, the pivotally supported links A and B
By using this, the frictional resistance is only rotational frictional resistance, and there is almost no sliding frictional resistance.Therefore, the operating feel is excellent, and the difference between the operating force and return force of the operating body is small, so the absolute value of the operating force is reduced. Furthermore, since the link man and B are integrally molded in advance, the number of component parts can be reduced and assembly can be simplified, which has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the push button switch of the present invention, Fig. 2 is a cross-sectional view of the same, Figs. 3 to 5 are views showing the same operating state, Figs. 6 and 7. 8 is a perspective view and a side view showing details of the link, and FIG. 8 is a cross-sectional view of a conventional push button switch. 11... Case, 112L... Receiving part,
12...Fixed contact piece, 13...Sliding body,
132L...hole, 14...movable contact piece,
15... Operating body, 151L... Convex part,
16...Cover, 16a...Hole, 17
...Link A, 17a...Support end, 1
7b...Movable end, 17C...Concavity, 1
7d...Connection part, 18...Link B,
18a...support shaft, 18b...rotation shaft, 19...coil spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 (in one piece) Figure 7 Figure 8

Claims (1)

[Claims] A case with a fixed contact piece, an operating body that can move up and down,
It consists of a sliding body housing a movable contact piece, a spring member for returning the operating body, and a molded member, which are integrally molded in advance and have one end rotatably supported by the sliding body, and the other end attached to the operating body. A link A is biased to A push-button switch that switches contacts by sliding in a direction different from that of the push-button switch.