JPH088029B2 - Interlock device for push button switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-button switch interlock device which is small in size and mechanically simple in structure and capable of performing reliable interlock.

[0002]

2. Description of the Related Art In a push button switch, an interlock device is provided to prevent two push buttons from being pushed down at the same time in order to prevent damage to the device due to simultaneous operation of both push buttons. This interlock device is commonly used, and is disclosed in Japanese Utility Model Publication No. 32-551 and Japanese Utility Model Publication No.
There is one disclosed in Japanese Patent Publication No. 9-28139. These are provided with interlocking rods that are movable laterally between opposing pushbuttons, and when one of the pushbuttons is pushed down, this causes the interlocking rod to move to the other pushbutton side. The other push button is locked.

[0003]

SUMMARY OF THE INVENTION In this known method,
The structure is complicated, the number of parts used is large, and assembly is troublesome. Especially, when a large number of springs and balls are used for the push button switch, the assembly becomes difficult. Further, since the interlock range is about half of the stroke of the push button, it is difficult to arrange the multi-stage switch contacts in this range, which is not suitable as the interlock system for the multi-stage push button switch.

The present invention has been made in view of the problems of the conventional interlock device for a push button switch, and an object thereof is to provide an interlock device for a push button switch having a simple structure and good operability. And

[0005]

In order to achieve the above object, an interlock device for a push button switch according to the present invention is provided between two push buttons facing each other in a main body and when the push button is pushed down. At the abutting position, the interlock is composed of an inclined surface having a high center and a lower outer peripheral edge, which are separated by three ridge lines extending in the radial direction from the center at substantially equal intervals from the center and the outer peripheral edge is lowered. Body, the lower surface of the interlock body is supported by a protrusion provided on the main body so that the body can swing and swivel, and a return spring that restricts swiveling of the interlock body is provided between the main body and the interlock body. It is characterized by having done.

[0006]

When one of the push buttons is pushed down, the push button comes into contact with the interlock body, and the interlock body is swung and swung so that the other push button comes into contact with the ridge line of the interlock body, and the other push button is contacted. The interlock is automatically applied. When the push button is released, the interlock body returns to the neutral position by the return spring that is arranged between the main body and the interlock body and restricts the turning of the interlock body.

[0007]

The present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 is a main body of a push button switch. The main body 1 has push button fitting holes 1a, 1a for arranging two push buttons 2, 2 facing each other facing upward, and this push button fitting Vertical guide grooves 1b, 1b for guiding a guide ball 3 for two-step or three-step operation (for action) are provided on the inner side surface on the outer side above the dowel hole 1a, and a push button fits from this guide groove 1b. The guide ball 3 is guided to the inner surface of the fitting hole 1a.

The push button 2 has a push piece 2b protruding from one side surface.
The push button fitting hole 1a has a shape such that it can be slidably inserted in the vertical direction of the main body 1, and a lateral hole 2a is bored in the lateral direction of the push button 2, and the spring 4 is sandwiched in the lateral hole 2a. The two guide balls 3 and 3 are inserted in such a manner that they are removed. The pair of guide balls 3 and 3 are projected toward the outside of the push button 2 by the action of the spring 4, whereby the push button 2 is pushed into the push button fitting hole 1 of the main body 1.
When inserted into a, the spring force causes the guide ball 3 to be pressed against the guide groove surface 1b. A spring fitting hole 2b is integrally formed at the center of the bottom of the push button 2, and when the push button 2 is fitted and inserted into the main body 1, the spring fitting hole 2b and the push button fitting hole of the main body 1 are always pushed up. A spring 5 is interposed between the bottom surfaces of 1a. In this case, movable contact pieces S1 and S2 penetrating in the horizontal and horizontal directions are arranged in the push button 2 so that the push button 2 does not come out of the main body 1 by the action of the spring 5. The movable contact pieces S1 and S2 are fixed contact pieces T1 fixed to the main body 1 side.
It contacts and separates from T2.

On the top surface of the main body 1, a circular recess 10 is formed between two facing push button fitting holes 1a, 1a, and a protrusion 12 is formed in the center of the recess 10 and inside the recess 10. The interlock body 6 is arranged so as to be fitted to
The tip of the protrusion 12 supports the center of the lower surface of the interlock body 6 and serves as a fulcrum when the interlock body 6 stands, swings, or turns. The return spring 7 of the interlock body 6 is fitted into the protrusion 12.

The return spring 7 has a coil shape,
Both ends thereof are linear straight end portions 7a and 7b, one of which is fitted into a locking hole formed in the inner bottom surface of the recess 10 and the other of which is fitted and locked in a locking hole formed in the interlock body 6, respectively. Then, when the depression of the push button 2 is released by this, the interlock body 6 is returned to the original position by the action of the return spring 7. The shape of the return spring 7 is not limited to the coil shape, and may be, for example, a pin shape as shown in FIG.

On the inner bottom surface of the recess 10, one protrusion 11 is provided at an intermediate position between two opposing push button fitting holes 1a, 1a, and the protrusion 11 pushes down the push button 2 to form the interlock body 6. When swinging, the lower surface of the interlock body 6 is supported, and the swinging direction and pressing amount of the interlock body 6 are regulated.

The outer shape of the interlock body 6 is a circle or a shape close to a circle, and the center divided by three ridge lines 6a, 6b, 6c extending in the radial direction from the center on the upper surface is high, and the outside is high. Gently sloping surfaces 61, 6 with lower peripheral edges
2, 63, the center of the lower surface is depressed, and the ridge line 6a
A hole for locking the linear end portion 7b of the return spring 7 is formed on the upper side. The interlock body 6 has its center located on the straight line connecting the two push buttons 2 facing each other, and
It is arranged so that one ridgeline 6a is located between the two.

The operation of the push button switch will be described below. FIG. 1 shows an OFF state in which both push buttons 2 and 2 are not pushed down. From this state, when the right push button 2 is pushed down and the first step operation (first action) is performed, the interlock member 6 is pushed by the push piece 2b of the right push button 2.
The inclined surface 62 of the inclined surface 62 is pushed down,
Sliding up, the interlock body 6 swings as shown in FIG. 6 while slightly turning counterclockwise as shown in FIG. Even if you try to push down the left push button 2 in this state,
Since the gap between the ridge line 6b of the interlock body 6 and the pressing piece 2b of the left push button 2 is small, the push button 2 cannot be pushed down for switch operation. That is, the left push button 2 is in a locked state.

When the right push button 2 is further depressed to perform the second stage operation (second action), the inclined surface 62 of the interlock body 6 is further depressed by the depression piece 2b of the right push button 2, and the depression piece is depressed. 2b slides on the inclined surface 62,
The interlock body 6 further swings counterclockwise as shown in FIG. 8 and swings as shown in FIG. Even if the push button 2 on the left side is pushed down in this state, there is no gap between the ridge line 6b of the interlock body 6 and the push piece 2b of the push button 2 on the left side, so that the push button 2 cannot be pushed down for switch operation. . That is, the left push button 2 is in a locked state.

When the pushing down of the right push button 2 is released, the push button 2 is automatically returned by the force of the spring 5.
On the other hand, the interlock body 6 is returned to the neutral position shown in FIG. 1 by the action of the return spring 7.

When the left push button 2 is pushed down,
The operation is opposite to the above operation, and similarly, the push button 2 on the right side is locked in the first step operation and the second step operation.

[0017]

The interlock device for a push button switch according to the present invention has a simple structure, the push button switch can be easily assembled, the operability is good, and the interlock can be reliably operated. Have advantages.

[Brief description of drawings]

FIG. 1 is a front vertical sectional view of an embodiment of an interlock device for a push button switch according to the present invention.

FIG. 2 (1) is a side vertical sectional view of one embodiment of the push button switch of the present invention, and (2) is a side vertical sectional view of another embodiment.

FIG. 3 is a plan view of an embodiment of an interlock device for a push button switch according to the present invention.

FIG. 4 is a plan view showing a relationship between a push button and an interlock body.

FIG. 5 is a plan view showing a state in which a first stage operation has been performed.

FIG. 6 is a front vertical view of the same.

FIG. 7 is a front vertical view showing a state where a second stage operation is performed.

FIG. 8 is a plan view of the same.

FIG. 9 is a side elevational sectional view of the main body.

FIG. 10 is a bottom view of an embodiment of the interlock device for the push button switch of the present invention.

FIG. 11 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Push button 2b Depressing piece 6 Interlock body 6a Ridge line 6b Ridge line 6c Ridge line 61 Sloping surface 62 Sloping surface 63 Sloping surface 7 Return spring 10 Recess 12 Protrusion

Claims (1)

[Claims] 1. A position between two push buttons (2, 2) facing each other in the main body (1) and at a position where the push buttons (2, 2) come into contact with each other when the push buttons (2, 2) are pushed down. , Three ridge lines (6a, 6b, extending from the center to the radial direction at substantially equal intervals from the center)
6c) an interlock body (6) which is composed of inclined surfaces (61, 62, 63) whose center is high and whose outer peripheral edge is low and whose bottom surface is recessed. The lower surface of 6) is swingably and rotatably supported by a projection (12) provided on the main body (1), and the main body (1) is also supported.
An interlock device for a push button switch, characterized in that a return spring (7) for restricting rotation of the interlock body (6) is provided between the interlock body and the interlock body (6).