JPS63102123A - Push-on switch - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a moderating push-on switch used in electronic equipment such as a video, television, or car stereo.

(Prior Art) Fig. 3 shows a cross section of a conventional moderating push-on switch, in which 1 is a switch case made of plastic resin with a plurality of protrusions 1a formed therein, and 2 is a convex fixed contact 2a.
One terminal is inserted into the switch case 1 and has convex fixed contacts 3a and 3b at its end, and the other terminal is inserted into the switch case 1. 4 is a fixed contact 3a, A movable contact consisting of a dome-shaped leaf spring loaded on 3b, 5 a cover plate fixed by a protrusion 1a of the switch case 1, and 6 held by a cover plate 5 loaded inside the switch case 1. It is a push board.

In the conventional push-on switch configured as described above, when the push plate 6 is pressed down, the central portion of the movable contact 4 that is in contact with the fixed contacts 3a and 3b is bent, and the movable contact 4 is brought into contact with the fixed contact 2a with moderation, and the terminals 2 and 3 are bent. The switch circuit between them is turned on, and when the above-mentioned depression is released, the movable contact 4 returns to its original dome shape and separates from the fixed contact 2a, and the switch circuit turns off.

FIG. 4 shows the characteristics of the above-mentioned switch operation, and the operation stroke generally shows a relatively short stroke of about 0.2 to 0.3 mm as shown in the figure.

(Problems to be Solved by the Invention) However, the conventional movable contact using a dome-shaped plate spring as described above is limited by the external dimensions and operates with a short stroke as described above, causing malfunction of electronic equipment used.
Therefore, high precision was required for the mechanism of the operating section. Furthermore, in the case of a small-diameter movable contact, if the operating force is designed to be small, the reversal action will not be performed, and conversely, if the operating force is increased, it becomes difficult to obtain a good sense of moderation, making it difficult to set the operating force arbitrarily.

In order to eliminate such conventional drawbacks, a coil spring 10 is loaded between the operating button 7 and the push-on switch 8 of the electronic device via an actuator 9 as shown in FIG. As shown in FIG. 7, there is an improvement method such as inserting a coil spring 15 between the movable contact 12 and the push plate 13 inside the push-on switch 11 via the actuator 14, but the operating characteristics in that case are as shown in FIG. As such, the difference e between the operating force p and the return force d becomes small, which has the disadvantage that it is difficult to obtain a good sense of moderation.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of conventional push-on switches, it is an object of the present invention to provide a compact push-on switch with moderation, which allows a stable operating stroke and operating force to be easily set.

(Means for Solving the Problems) In order to achieve the above object, the present invention installs and intervenes a coil spring between a movable contact formed in a dome-shaped leaf spring and a push plate, and pushes down the outer periphery of the movable contact, and the other side edges are configured to contact the push plate.

(Function) According to the present invention having the above configuration, the operating stroke depends on the gap between the push plate and the movable contact, regardless of the movable contact made of the dome-shaped leaf spring, and the operating force is Until the tip of the push plate touches the movable contact, it is obtained as a characteristic of the coil spring, and after the tip of the push plate comes into contact with the movable contact,
The operating stroke and operating force are obtained by the characteristics of the dome-shaped leaf spring and the coil spring.
This can be set relatively freely depending on the design of the coil spring.

(Example) Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and the same symbols 6 to 6 as in FIG. 3 are the same as those in FIG. 3, or have the same function and operation. A coil spring 16 is connected between the movable contact 4 made of a dome-shaped plate spring, and
The point is that we intervened by installing the .

By providing the coil spring 16 in this way, a gap g can be formed between the movable contact 4 and the push plate 6, making it possible to set the operating stroke relatively freely.

Further, by appropriately designing the material, dimensions, etc. of the coil spring 16, the operating force can be freely set.

FIG. 2 shows various examples (A), (B) and (
C) is shown.

The present invention as described above provides a push-on switch that includes:
Since the coil spring 16 is installed and intervened between the push plate 6 and the movable contact 4, the operating characteristics can be freely designed by selecting the characteristics of the coil spring 16, the characteristics of the movable contact 4, etc.

(Effects of the Invention) As is clear from the above explanation, the present invention can lengthen the operating stroke while maintaining a good sense of moderation.

It is a push-on switch with a moderation function that can be easily prevented from malfunctioning even if it is incorporated into an electronic device with the push plate pushed in to a certain extent, so it can be used with great benefit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a characteristic diagram of the same embodiment, and FIG. 3 is a sectional view of an example of a conventional example.
FIG. 4 is a diagram showing the operating characteristics of a conventional example, FIG. 5 is a sectional view of a main part of another conventional example, and FIG. 6 is a sectional view of yet another conventional example.
FIG. 7 is an operating characteristic diagram of a conventional example. 1...Switch case, 1a...Protrusion, 2゜3
...terminal, 3a, 3b...fixed contact, 4,1
2...Movable contact, 5...Cover plate, 6,13...
・Push plate, 7...operation button, 8.11...
・Push-on switch, 9, 14... actuator, 10. Is, 16...Coil spring. Patent Applicant: Matsushita Electric Industrial Co., Ltd. Figure 1 1-Person A, 10 Persons 2.3-Separator 4-1 Movable insertion points 5-9 Covering trunk 61 Tonneau / Yu class 16, - Coil 1J° Figure 2 E movable holding, back, 1; characteristic low coil) ko'η1,! Characteristics Fig. 3 1-Person 7 -Touch-on input A, l19-7 cutter 1o-, coil 1rζ Fig. 6 12-0 possible 1/J insertion point ゛', 13-0 b. Figure 7 0 1.0 (m
m) fil) 4'F stroke

Claims (1)

[Claims] Fixed contacts at both ends of the inner bottom of the switch case, another fixed contact in the center, a movable contact made of a dome-shaped leaf spring placed in contact with both fixed contacts, and a movable contact that can be pressed freely inside the switch case. It consists of a push plate provided in the dome-shaped leaf spring, and a coil spring installed between the push plate and the movable contact. A push-on switch characterized in that a side edge of the push-on switch is arranged so as to be in contact with the push plate.