JPH0310584Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] In a push button switch that opens and closes by operating a push button, a switch element consisting of a disc-shaped spring housed in a terminal board is arranged upright and is moved up and down by operating the push button. By configuring the concavity and convexity of the concavity spring to reverse operation, a push button switch using a concise spring can be downsized.

[Field of Industrial Application] The present invention relates to an improvement of a push button switch using a disc spring.

Push-button switches, which switch between contacts (electrodes) by using the reversing motion of a disc-shaped spring made of springy metal, have relatively high contact pressure and are reliable in operation, and can be made thin, making them ideal for keyboards. etc. are widely used.

[Conventional technology]

FIGS. 6 and 7 are basic diagrams of the conventional push button switch.

In FIG. 6, the pushbutton switch 1 consists of a switch section 2 and an operating section 3.

The switch section 2 consists of a terminal plate 4, a disc-shaped spring 5, and an actuator 6. The terminal board 4 has a disk-shaped spring 5 received in a circular recess 7 in a plan view, and has an electrode 8 exposed at the center of the recess 7 and a conductor terminal 9 whose other end is led out to the side. A plurality of electrodes 10 are provided exposed around the periphery of the conductor terminal 11, and the other end thereof is provided with a conductor terminal 11 led out to the side. The convex surface of the disk-shaped spring 5 inserted into the recess 7 faces upward, and the actuator 6 has one end 12 fixed to one end of the terminal plate 4.
The protrusion 13 protruding toward the intermediate portion is brought into contact with the center of the convex surface of the disc-shaped spring 5.

The operating section 3 includes a push button 14, a slider 16 that moves up and down along a guide 15, and a coil spring 17. When the push button 14 is pressed, the tip 18 is pushed down via the slider 16 and the coil spring 17 compressed by an appropriate amount. In the actuator 6, the protrusion 13 presses the disc-shaped spring 5, and the concavity and convexity of the disc-shaped spring 5 are reversed.

As a result, the disk-shaped spring 5, which was in contact with the electrode 10 and separated from the electrode 8 during non-operation as shown in the figure, is now connected to the electrode 8 and
0 and conductor terminals 9 and 11 are electrically closed.

Then, when the pressing force is removed, the disc spring 5
The coil springs 17 return to their original positions with their own elastic restoring force and are in the illustrated state, that is, the conductor terminal 9
and 11 are restored to the open state.

In FIG. 7, in which the same reference numerals are used for parts common to those in FIG.

The switch section 22 consists of a terminal plate 4, a disc-shaped spring 5, and an actuator 24. Place the disc spring 5 into the recess 7
a terminal board 4 which is received in the
An actuator 24 whose one end 25 is fixed and can be elastically deformed as appropriate is provided above, and a protrusion 26 protruding from the middle of the actuator 24 comes into contact with the center of the convex surface of the dish-shaped spring 5. There is.

The operation unit 23 consists of a push button 14 and a slider 16 that moves up and down along a guide 15.
The lower end surface of the actuator 24 is mounted on the other end 27 of the actuator 24.

When the push button 14 of such a push button switch is pressed down, the actuator 24, which is elastically deformed by the push-down via the slider 16, causes the protrusion 25 to press the disc-shaped spring 5, thereby reversing the unevenness of the disc-shaped spring 5.

As a result, the disk-shaped spring 5, which was in contact with the electrode 10 and separated from the electrode 8 during non-operation as shown in the figure, is now connected to the electrode 8 and
0 and conductor terminals 9 and 11 are electrically closed.

Then, when the pressing force is removed, the disc spring 5
The actuator 24 returns to its original state with its own elastic restoring force and connects as shown, that is, the conductor terminal 9
and 11 are restored to the open state.

[Problem that the invention attempts to solve]

As explained above, in the conventional push button switch equipped with a disc spring, the direction in which the push button is pressed and the direction in which the disc spring is pressed are in the same direction.

While the desirable stroke of a push button is about 4 mm, when a dish spring of dimensions commensurate with the size of the push button is reversed, the amount of displacement of the dish spring is, for example, a dish shape with an outer diameter of about 9 mm. The amount of displacement of the spring is 0.3 mm, which is significantly smaller than the stroke of the push button.
That's about it. At the same time, since the pressing force for reversing the unevenness of the dish-shaped spring is about 500 gr, when the desired pressing force of the push button is 100 gr, the lever ratio of the actuator is 1:5.

Therefore, the length of the actuator with one end fixed at a position laterally than the disc spring is such that the diameter of the disc spring is 9.
mm (radius 4.5 mm), the deviation between the center of the disc spring and the center of the push button is 18 mm. As a result, push-button switches that have a terminal board and operation section mounted on one housing have become large and unsuitable for use in keyboards, and when used for keyboards, the switch section and operation section must be mounted on separate panels. was.

In other words, a conventional push button switch that uses a disc-shaped spring and has a stroke for operation that is larger than the reverse displacement of the disc-shaped spring has a large space inside the housing when the switch part and the operating part are installed in one housing. There was a problem with the large size. Therefore, in order to use such a push button switch for a keyboard, the switch part and the operation part are mounted on separate panels, and the pair of panels are aligned and joined, which makes assembly work complicated and requires skill. There was a problem with this.

[Means for solving problems]

FIG. 1 is a basic diagram of the push button switch according to the present invention. In FIG. Terminal board with conductor at the end, 3
Reference numeral 2 represents a lever that operates the disc spring 5 by operating the key top, and 33 represents a base body that supports the terminal board 4.

As shown in FIG. 1, the above problem is caused by a dome-shaped dish-shaped spring 5 made of a metal with spring elasticity, a recess 7 that receives the dish-shaped spring 5, and a first part exposed around the periphery of the recess 7. a second electrode 8 exposed at the center of the recess 7, a first terminal 11 connected to the first electrode 10, a second terminal 9 connected to the second electrode 8; 1. The terminal board 31 from which the second terminals 11 and 9 are led out from one side, the base 33 that supports the terminal board 31 almost upright, and the vertical movement of the slider 16 attached to the base 33 and attached to the push button 14. The housing has a through hole for guiding, and can swing in conjunction with the vertical movement of the slider 16 via a coil spring 17 to reverse the unevenness of the disc spring 5, and the center of the swing is in contact with the coil spring 17. The lever 3 is characterized in that it comprises a lever 32 located between the contact portion and the contact portion of the dish-shaped spring 5, and further, the lever 3 is rotatably supported.
2 is a through hole through which the upright terminal plate 31 passes, a protrusion that protrudes inside the through hole and comes into contact with the center of the dish-shaped spring 5, and a pusher that protrudes outside the through hole and faces the lower surface of the slider 16. The present invention is solved by a push button switch characterized in that the base body 33 and the terminal plate 31 are integrally formed by molding plastic.

[Effect]

According to the above means, since the terminal board 4 is provided upright, the space for accommodating the terminal board 4 is narrowed;
In addition, since the operating direction of the dish-shaped spring 5 is orthogonal to the operating direction of the push button 14, the lever for operating the dish-shaped spring 5 can be configured in a small size because its supporting position can be provided in the middle part. . Therefore, the deviation between the center of the disk-shaped spring 5 and the center of the push button 14 can be made small, and even though the switch part and the operating part are mounted in one housing, it is possible to create a push button switch that does not become large. Ta.

〔Example〕

A push button switch according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing the external appearance of a push-button switch according to an embodiment of the present invention; FIG. 3 is a perspective view showing the terminal board and disk-shaped spring housed in the push-button switch shown in FIG. 2 separated; FIG. 4 is an exploded perspective view of the push button switch shown in FIG. 2.

In FIG. 2, in which the same reference numerals are used for parts common to those in the previous figure, the switch part and operation part of the push button switch 30 are attached to a base body 33 and a housing 34 inserted into the base body 33, and the terminals of the switch part A pair of conductor terminals 9 and 11 led out from the plate protrude downward from the base 33, and a push button 14 of the operating section is movable up and down.
protrudes upward from the housing 34.

In FIG. 3, in which the same reference numerals are used for parts common to the previous figure, the terminal plate 31 includes a molded body 35 formed by molding plastic and having a recess 7;
A conductor terminal 9 has a plurality of electrodes 8 exposed at the center thereof, and the other end is led out to one side of the molded body 35.
and a plurality of electrodes 10 exposed at the periphery of the recess 7.
A conductor terminal 11 whose other end is the same as the conductor terminal 9 is led out to one side of the molded body 35, and after receiving the dish-shaped spring 5 in the recess 7, an insulating sheet 36 covering the opening surface of the recess 7 is attached. It becomes.

In FIG. 4, in which the same reference numerals are used for parts common to those in the previous figure, the switch part is made up of a terminal plate 31 and a lever 37 that receive a disk-shaped spring and have conductor terminals 9 and 11 led out. , 11 are inserted into the through-hole 41 of the base body 33, the terminal plate 31 stands upright on the base body 33.

The lever 37, which corresponds to the lever 32 in FIG. Lever 32
Lever 37 that can make the push button switch smaller than the
, a through hole 38 through which the terminal plate 31 passes is provided in the center, a protrusion 39 serving as a center of swing is provided near the left end of the side surface facing in the front-rear direction, and a terminal is provided in the center of the left side of the through hole 38, which has a rectangular shape in plan view. A protrusion 40 (FIG. 5) is provided substantially at the center of the convex surface of the disc-shaped spring 5 received in the plate 31, and an upward protrusion 40 (FIG. 5) is provided at the center of the right end into which the lower end of the coil spring 17 is fitted. 42 are provided.

The pair of protrusions 39 are connected to the bearings 43 of the base body 33.
It is rotatably fitted.

The housing 34 includes a through hole 44 that guides the vertical movement of the slider 16, and a through hole 45 into which the upper end of the upright terminal plate 31 fits. only visible) protrusion 4
6 comes to engage with the recess 7 of the base body 33 when the housing 34 is fitted to the base body 33.

On the other hand, the slider 16 has a protrusion 48 provided on the push button 14.
(Fig. 5) into which the housing 3 is press-fitted; a protrusion 50 (Fig. 5) protruding from the center of the recess opening on the lower surface into which the upper end of the coil spring 17 is fitted;
4 and a locking end surface 51 to prevent it from slipping out above.

In addition, in FIGS. 2 and 4, the base 33
The protrusions 52 protruding forward and backward are for locking when the push button switch 30 is mounted on a panel (not shown), and the elastic pieces necessary together with the protrusions 52 for this mounting are not shown.

FIG. 5(a) shows the push button switch 30 having such a configuration in a non-pressed state, and FIG. 5(b) shows the push button switch 30 in a pressed state.

In FIG. 5A, the disk-shaped spring 5 maintains its original convex shape to the right due to its own elasticity. The push button 14 is now maintained in the lifted position, and the push button 14 is pushed up via the coil spring 17 and the slider 16.

Therefore, the conductor terminals 9 and 11, which are lined up in the thickness direction of the paper in FIG. 5, are electrically separated.

Therefore, when the push button 14 is pressed down with a finger, the coil spring 17 compressed via the slider 16 presses down the protrusion 42, causing the lever 32 to circuit clockwise by a predetermined amount, as shown in FIG. As a result, the protrusion 40 reverses the concave and convex portions of the disc spring 5. Then, the pair of conductor terminals 9 and 11 are electrically connected via the disk spring 5.

Next, when the pressing force is removed, the disc spring 5 and the coil spring 17 return to their original positions due to their own elastic restoring force, and the push button switch 30 returns to the state shown in FIG. 5A.

In the above embodiment, the mold body 35 and the base body 33 of the terminal board 31 are made separately. Therefore, the mold body 35 and the base body 33 are formed integrally,
That is, if the push button switch is L-shaped in side view and the conductor terminals 9 and 11 are inserted into the upright portion corresponding to the mold body 35 and molded, the number of components of the push button switch will be reduced and assembly will be facilitated.

[Effect of idea]

As explained above, according to the present invention, the lever for reversing the disc spring is not affected by the size (diameter) of the disc spring, compared to the conventional actuator corresponding to the lever, and the lever rotates Since the direction of the protrusion facing the disc spring and the direction of the position pressed by the push button can be made almost perpendicular to the center, the length can be shortened, so when the switch part and the operation part are installed in one housing, it will be shorter than the conventional configuration. Space required is 28mm
What used to be 16mm x 16mm has been made smaller to 16mm x 16mm, which has an extremely large effect in making it easier to incorporate it into keyboards, etc.

[Brief explanation of the drawing]

Figure 1 is a basic diagram of the push button switch of this invention.
FIG. 2 is a perspective view showing the external appearance of a push-button switch according to an embodiment of the present invention, FIG. 3 is a perspective view showing the terminal board and disk-shaped spring housed in the push-button switch shown in FIG. 2 separated; 4 is an exploded perspective view of the push button switch shown in FIG. 2, FIG. 5 is a side sectional view for explaining the operation of the push button switch shown in FIG. 2, and FIG.
7 and 7 are basic diagrams of a conventional push button switch equipped with a disc spring. In the figure, 5 is a dish-shaped spring, 7 is a recess, 8,
10 is an electrode, 9 and 11 are conductor terminals, 14 is a push button,
16 is a slider, 17 is a coil spring, 30 is a push button switch, 31 is a terminal board, 32 is a lever, 33 is a base body, 34 is a housing, 35 is a terminal board molded body, 37 is a protrusion for supporting the lever, 38 is a terminal board A through hole 44 indicates a through hole for a slider guide.

Claims (1)

[Claims for Utility Model Registration] (1) A dome-shaped disc spring 5 made of metal, a recess 7 that receives the disc spring 5, and a first electrode exposed around the recess 7. 10, comprising a second electrode 8 exposed at the center of the recess 7, a first terminal 11 connected to the first electrode 10, and a second terminal 9 connected to the second electrode 8; A terminal board 31 from which the first and second terminals 11 and 9 are led out from one side, and a base 33 that supports the terminal board 31 almost upright.
a housing having a through hole that guides the vertical movement of the slider 16 attached to the base body 33 and attached to the push button 14; can be swung to invert the coil spring 1, and the center of swiveling is at the coil spring 1.
A push button switch comprising a lever 32 located between a contact portion with the disk spring 5 and a contact portion with the disc spring 5. (2) The rotatably supported lever 32 has a through hole through which the upright terminal plate 31 passes, a protrusion that protrudes inside the through hole and comes into contact with the center of the dish-shaped spring 5; The push-button switch according to claim 1, further comprising a push-down force acting portion that protrudes outside the through hole and faces the lower surface of the slider 16. (3) The push button switch according to claim 1, wherein the base body 33 and the molded body 35 of the terminal plate 31 are integrally formed by plastic molding.