JPS63184221A - Interlock apparatus for push button switch - Google Patents

Abstract

(57) [Summary] 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 push button switch interlock device which is compact and has a mechanically simple structure to ensure reliable interlock.

[Conventional technology and point U]

In push button switches, an interlock device is required to prevent the two push buttons from being pressed at the same time in order to prevent damage to the device due to simultaneous operation of both push buttons. The interlocking system of a seesaw set with levers installed in 2
If applied to a step-operation push-button switch, two switch contacts with different steps must be provided at positions 172 or more of the push-button pressing distance, which increases the size of the switch body and results in a switch with poor operability.

In addition, as a mechanical interlock mechanism,
No. 2-551 and No. 39-28139 disclose this method, but in this method, when one push button is pressed, even if the hand is released due to a foreign object, the seesaw set will be released when the push button is pressed down. As shown in 9 above, the interlock machine cannot be returned to its original position by pressing the other push button. There is a drawback that the push button becomes depressed.

On the other hand, with the electrical interlock system, the switch body becomes larger and the circuit wiring becomes more complicated, and since both pushers can be pressed at the same time, there are problems in that operability is poor, especially during inching operations. .

[Means for solving problems]

In a push button switch that has two opposing push buttons in the main body that can be pressed, a symmetrical tunnel-shaped interlock hole with a high center is formed in the main body between the two push buttons, and three An interlock in which a pole or roller is inserted and the center pole can be pushed up by pressing the push button, and a fulcrum support is provided on the center pole so that it can be raised and lowered, and this support is installed between the two opposing push buttons. Support the lever in a seesaw shape.

[Effect]

When the two push buttons are pressed down at the same time, the fulcrum of the seesaw is pushed up, reducing play and creating a small and reliable interlock device. Furthermore, if one pushbutton cannot be returned to its original position, the other pushbutton can be pushed up by the interlock lever, making it a safe pushbutton switch. Make it even smaller,
This push-button switch has a mechanically simple structure, has little play, and ensures reliable interlocking.It is used in push-button switches and interfaces for two-throw shooting such as fine-speed and dual-speed hoists, electric chain locks, etc. It is used in operation pushbutton switches and switches that require a long locking time, for example, when the forward and reverse directions of a motor are controlled by an SSR relay.

〔Example〕

The present invention will be described below based on an embodiment of an interlock device for a two-stage operation push button switch.

In the figure, reference numeral 1 denotes a main body of a push button switch, and push button fitting holes 1a and 1a for fitting two push buttons 2, 2 facing each other are provided in the main body 1 to protrude upward. Vertical guide grooves 1b, lb for guiding the guide ball 3 for two-stage operation facing two inner surfaces facing each other at the upper part of the fitting hole 1a.
will be established. The guide ball is guided from this guide groove 1b to the inner surface of the push button fitting hole.

The push button 2 has a shape that can be slidably inserted into the push button fitting hole, and a lateral hole 2a is provided in a protruding manner in the lateral direction of the push button, and a 2WA guide ball 3 is inserted so that a spring 4 is sandwiched in the lateral hole 2a. , 3 are placed opposite each other and fitted into each other, and both guide balls 3 and 3 are made to protrude outward from each other by the action of a spring 4, thereby inserting the push button 2 into the push button fitting hole of the main body. When pressed against the inner surface of the hole and the guide groove surface, a spring fitting hole 2b is formed in the center of the bottom of the push button, and a tapered and ring-shaped bottom surface 2C is integrated around the outer periphery of the spring fitting hole. A spring 5 is inserted between the spring fitting hole and the bottom of the push button fitting hole of the main body so as to always push up the push button when the push button is inserted into the main body.
shall be intervened. In this case, the push button is penetrated in the horizontal direction so that the push button does not come out from the main body due to the action of the spring 5, and the fixed contact pieces Tl and T2 are fixed to the bean main body side.
It is supported by a movable contact piece 81.32 that comes into contact with and separates from the contact piece 81.32.

Inside the main body 1 are two opposing push button fitting holes 1a.

An interlock hole 10 is provided to protrude so as to connect the holes 18. The interlock hole 10 has a symmetrical tunnel shape with the center being high as a whole, with the center being raised and both sides becoming lower toward the tip, as shown in the figure.
As shown in Figures (A), (B), and (C), a pole BL for raising and lowering the fulcrum is provided at the center 10a of the interlock hole 10, and interlocking poles B2 are provided at the inclined surfaces 10b and 10c on both sides, respectively. ．． B.

At the same time, the hole 11 is opened at the top of the main body 1 at the upper part near the center of the interlock hole 10 and is electrically connected to the interlock hole 10.
The fulcrum support 6 is inserted into the inside of the fulcrum 1.

When these three poles BL, Ba, and B are inserted into the interlock hole 10, the poles B□ at both ends.

A portion of B3 protrudes into the push button fitting holes 1a and la, and a pole Ba is provided with a stopper portion 10d for removing the pole.

Make sure that B2 does not fall off completely.

The fulcrum support 6 fitted into the hole 11 is slidable in the vertical direction, and its lower surface is in contact with the pole B.
This fulcrum support 6
The upper surface of the interlock lever 7 is in contact with the interlock lever 7, and the interlock lever 7 is supported by the fulcrum support 6 so that both ends of the interlock lever 7 swing like a seesaw when the push button is depressed. Further, both ends of the interlock lever 7 are adapted to be latched to a portion of the opposing push button 2.

Next, the operation of the push button switch of the present invention will be explained based on the operation explanatory diagram of FIG. 2.

From the resting state of FIG. 2(I), press one of the push buttons 2, for example (
When the push button 2 on the left side is pressed down to perform the first operation as shown in I+), the guide ball 3 of the push button reaches the bottom of the guide groove, where the contact S1 of the first step comes into contact with the push button. A downward force acts on the pole B2 at the bottom, and the pole B2 is moved to the other push button side so as to sink into the interlock hole, thereby also pushing the other pole B3 to the right via the center pole BL. is pushed out. In this state, if you press pushbutton 2 on the right side, pole B1 will move to the left,
The pole B pushes up the fulcrum support metal fitting 6 and the push button is locked by the interlock lever 7 before the contact S1 comes into contact with it.

Further, when the left push button 2 is pressed down to perform the second operation, the second contact S2 comes into contact. In this way, regardless of whether you perform the projection operation or the two-stage operation, the
), (III), the two poles B, , B2 are locked by the side surface of the pressed push button, the pole B1, the fulcrum support metal fitting 6, and the interlock lever 7, so that the other push button cannot be pressed down at the same time. Similarly, operating the right push button has the same effect.

Further, when the left push button 2 is pressed down, when the pole B2 moves to the right, it moves through the center pole BL according to the shape of the interlock hole 10, that is, in a symmetrical tunnel shape with a high center. Push the right pole B3 as well and move to the right. Then, the right pole B3 comes into contact with the right push button and is stopped.

At this time, in the case of the first projection operation, the state is as shown in FIG. 2 (11), and the interlock lever is still in a state of freely swinging. However, when the left push button is further pressed down to enter the state of the second projection operation, the left end side of the interlock lever is pushed down by the left push button that has been pressed down the entire stroke.

This state is shown in Figure (III), and as the lever swings in this way, the right push button is locked by this lever and is prevented from being pressed down.

Moreover, the one shown in FIG. 2 (IV) shows a state in which both the left and right push buttons are pressed down at the same time. When both push buttons are pressed down at the same time, pole B□+B2 is moved toward the center of the interlock hole, so the center pole B
, is pushed upward. The amount of pushing up of this pole BL is made to be much larger than when one push button is pressed down the entire stroke, so that the contact S1 is fixed by the lever lifted by the rise of the fulcrum support 6 via the pole B1. Both push buttons are engaged and locked before contacting the contact point T.

Next, we will compare the states of the interlock device of the present invention when no push button is pressed, when both push buttons are pushed simultaneously, and when one push button is pushed all the way.

The distance yP, y,, yc from the bottom of the pushbutton switch to the center of the center pole B holds the following relationship: ys>3'c ≧When the y-angle pushbuttons are pressed at the same time, the fulcrum of the interlock lever rises. . Thus, a distance traveled within 172 of the push button stroke allows interlocking of the switch contacts.

Therefore, it becomes possible to arrange the two switch contacts in a well-balanced manner during the stroke of the push button, and it becomes possible to create a switch with a small switch body and very good operability. In addition, the surface of the pole holder is made such that when the push button is not pressed, the center of pole B2 is located on the positive side in the y-axis direction from the line connecting the centers of pole B3.

Although three poles were used in the above embodiment, it is also possible to use rollers or other shapes such that the central pole moves smoothly in the positive direction of the y-axis due to the force applied from both sides. The shape of the bar is not limited. Furthermore, although the fulcrum support is a separate item from the pole B4, it is also possible to form the fulcrum support and pole B into one, or to form the fulcrum support and the interlock lever into one. It is.

Furthermore, in the embodiment, a push button switch for two-stage operation was described, but it can also be applied to a projection push button switch and a reversible electromagnetic switch. Since the interlock time can be reliably long, safe and reliable push button switches and switches can be formed.

〔Effect of the invention〕

According to the present invention, an interlock lever that moves like a seesaw and is disposed between two opposing push buttons moves its fulcrum position up and down in response to the press of the push button. It has the advantage that reliable interlock can be achieved even if the push stroke is made small, the switch body can be made smaller, and it has good operability.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view, Figure 2 (In (II) (III)
(IV) is an explanatory diagram of the operation, FIG. 3 is a side view, and FIG. 4 is a perspective view of the overall appearance. 1 is the main body, 2 is the push button, 10 is the interlock hole, Bi,
Ba, B, l are poles, 6 is a fulcrum support, 7 is an interlock lever Figure 1 Figure 2 (1) (II) Figure 3 procedural amendment (voluntary) Patent application filed on March 25, 1986 Edict 62-15700 No. 2, name of the invention Interlock device for pushbutton switch 3, relationship to the I1G case Patent applicant 1-5-16 Yamasaka, Higashisumiyoshi-ku, Osaka City, Niimi Denki Co., Ltd. 4, agent 1, 5th Fuji Pill New Building, 1-2-8 Nishihonmachi, Nishi-ku, Osaka City, from page 2 of the specification, line 14, ``With this method...'' to line 16 of the same page, ``In case...'' is corrected as follows. rWith this method, if the push button does not return due to foreign objects, etc.

Claims (1)

[Claims] In a push button switch provided in the main body so that two push buttons facing each other can be pressed, a symmetrical tunnel-shaped interlock hole with a high center is formed inside the main body and between the two push buttons. Two poles or rollers are inserted, the center pole can be pushed up by pressing the push button, and a fulcrum support is provided on the center pole so that it can be raised and lowered, and this support is used to construct an interface between the two opposing push buttons. A push button switch interlock device with a locking lever supported in a seesaw shape.