JPH04190525A - Interlocking unit for push-button switch - Google Patents

Abstract

PURPOSE:To realize reliable interlocking and improve operability by supporting as a fulcrum an angle projection formed on the inner bottom surface of a groove fitted with a lever, and disposing a return spring for always pushing up an interlocking lever. CONSTITUTION:When either one of push-buttons 2 is pushed down, the fulcrum of an interlocking lever 13 is fittingly supported by an angle projection, and the interlocking lever 13 is rocked like a seesaw according to the pushing-down operation of the push-buttons 2 and at the same time the opposite side of the lever 13 comes into a state of being pushed up and the push-button of the anti- pushing-down side is locked to be incapable of being pushed down. Further, when the push-button 2 is pushed down, the lever 13 moves in a lateral direction to the push-button 2 of the anti-pushing-down side and the locking of the push- button 2 of the anti-pushing-down is made more reliable by the pushing-up force of the spring 14 of the lever 13. When the pushing-down action of the push-buttons 2, 2 is two stages or three stages, the interlocking is reliably performed by that operation. Thereby, the transfer friction of the interlocking lever is reduced and operability is enhanced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an interlock device for a multi-stage push button switch that is compact and has a mechanically simple structure, and is capable of reliably interlocking over a wide range. be.

[Conventional technology]

In a push button switch, an interlock device is required to prevent 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.

Utility Model Publication No. 32-551 and No. 3 are widely used.
There is one disclosed in Publication No. 9-28139. In this system, an interlocking rod is housed inside the switch body so that it can be moved laterally between opposing pushbuttons, so that when one of the pushbuttons is pushed down, it moves to the other pushbutton and locks it. This is what was done.

[Problem to be solved by the invention]

This known method has a complicated structure and uses a large number of parts.
It requires a lot of effort to assemble. Assembly is difficult, especially when using springs or balls. Additionally, the interlock range is approximately half of the switch stroke. Therefore, it is difficult to arrange multi-stage switch contacts in this range, and this is not suitable as an interlock system for multi-stage switches.

The present invention has been made in view of this, and an object thereof is to provide a multi-stage switch interlock system that reduces movement friction of an interlock lever when a push button is pressed and has good operability.

[Means to solve the problem]

The present invention has been made to achieve the above two objects, and is provided with two push buttons facing each other inside the main body so as to be pressable, and an interlock that swings like a seesaw between the two push buttons within the main body. In a push button switch in which a groove is formed into which a lever is inserted, and the tips of the interlock levers are fitted and locked to the inner surface of the push button, a protrusion that serves as a fulcrum is formed at the center of the lower surface of the interlock lever. A support rod is inserted into the hole penetrating the lever, the support rod is supported by the main body, and a spring is interposed between the support rod and the top surface of the hole to push down the lever, thereby creating an interlock lever. The main feature is that a chevron-shaped protrusion that supports the protrusion as a fulcrum is formed on the inner bottom surface of the interlock lever insertion groove of the main body.

[For production]

When one of the push buttons is pressed down, the fulcrum of the interlock lever fitted to the inner surface of this push button is abutted and supported by the chevron-shaped protrusion formed on the inner bottom surface of the interlock lever insertion groove. Therefore, when the push button is pressed, this interlock lever swings like a seesaw, and the lever fulcrum moves a little along the slope of the chevron-shaped protrusion, which causes the opposite side of the lever to be pushed back. , the pushbutton on the presser side is locked and cannot be pressed.

When this push button is pushed further, the fulcrum of the interlock lever moves further along the inclined surface of the chevron-shaped protrusion. At this time, the lever moves laterally in the direction of the press-down side push button, and this lever simply receives the push-up blade by a spring, which further ensures the locking of the press-down side push button. With this operation, interlock can be reliably performed even if the push button has two or three steps of depressing action. When the pushbutton is released, the lever smoothly returns to its original position due to the action of the spring, improving operability.

〔Example〕

The present invention will be explained below based on the illustrated embodiments.

In the figure, reference numeral 1 denotes a main body of a push button switch, and within this main body 1 there is a push button fitting hole 1 for fitting two push buttons 2, 2 facing each other. a and ia facing upward, and a hole for guiding a guide ball 3 for two-stage or three-stage operation (for action) on the inner surface of the outer side at part -1 of this push button fitting hole 1a. Vertical guide groove 1b.

]b is provided. The guide ball 3 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 in the vertical direction of the main body 1, and the inner side of the push button is designed so that the guide ball does not protrude in the horizontal direction of the push button.
a, insert the two guide balls 3゜3 into the horizontal hole 2a with the spring 4 in between, and
The pair of outer guide balls 3 are made to protrude toward the outside of the push button 2 by the action of a spring 4.
When inserted into the push button fitting hole of the main body, the reguide ball 3 is pressed against the guide groove surface 1b by spring pressure, and a spring fitting hole 2b is integrally formed in the center of the bottom of the push button. When the push button is inserted into the main body, a spring 5 is interposed between the spring fitting hole and the bottom surface of the push button fitting hole of the main body so as to always push the push button upward. In this case, a fixed contact piece T is inserted through the push button in the horizontal direction so that the push button 2 is not pulled out from the main body 1 by the action of the spring 5, and is fixed to the main body side.
I, a movable contact piece S1 that comes into contact with and separates from T2. Supported by S2.

The top surface of the main body 1 has two opposing push button fitting holes] a and la.
A groove 10 is formed so as to connect the grooves, and a support rod 12 is formed in a direction intersecting with the groove 10 at approximately the center of the alo.
In order to support the support guides 11.11, the support guides 11.11 are arranged opposite to each other, and grooves 11a and Ila are formed on the mutually opposing inner surfaces of the support guides 11, 11, respectively.
1a, 1], a support rod 12 inserted into a hole 13H provided in a through the center of the interlock lever 13;
Fit and support both ends of.

In the embodiment shown in FIGS. 1 and 5 in detail, this interlocking lever 13 has a seesaw shape with a size and shape that can be fitted into the groove 30, and has a triangular fulcrum projecting from the lower surface of the center. 13a is protrudingly provided, and the tip of this fulcrum 13a is formed on the inner bottom surface of the groove 10 for interlocking and bar fitting. Both lights fJ 1.3 b, 13 c of this interlock lever 13 are supported in contact with the top surface or a part of the inclined surface of the OT.
is a locking hole 2c formed on the inner surface of the opposing push buttons 2, 2.
, 2c.

Further, the hole 131 of this interlocking lever 13 (the support rod 12 that is inserted into the hole 131 is fitted and supported by the groove 11, 1.1,
A recess 12a is formed at the position within H, and this recess 1.2
The lower end of the spring 14 is supported in the hole A, and the upper end of the spring 1/I is supported in contact with the large inner surface of the spring 1/I, and the interlock lever 13 is always moved upward by the elastic force of the spring 14. Apply a pushing force. The spring force of the spring 14 does not have to be so strong as to be a little larger than the pressing blade due to the weight of the lever 13, that is, to lift the lever 13.

The operation of the push button switch configured as described above will be explained below with reference to FIG. 6.

FIG. 6(A) shows an OFF state in which both push buttons 2, 2 are not pressed down. Now, as shown in the same figure (B), if you push down the push button 2 on the right side for one step operation,
In response to depression of the right push button, the interlock lever 13 whose tip is fitted into the push button is supported by the fulcrum 13a, and both right sides of the lever 13 are pushed down and tilted.

In this state, even if you try to press the left push button 2, the lower part of the interlock lever is between the fulcrum 13a and the chevron protrusion LO.
Since it is supported by T, the left push button cannot be pressed down. That is, the left push button 2 is in a locked state.

Further, when the right push button 2 is further depressed to perform the second operation (second action), the state shown in FIG. 6(C) is obtained. That is, in state J of FIG. 6(B), when the interlock lever is further pushed down, the fulcrum 13a is pressed to the chevron-shaped protrusion with a stronger force by lowering the right push button. As a result, the fulcrum 13a of the lever 13 moves the inclined surface of the chevron-shaped protrusion 10T toward the press-down press 1'' side, and is supported in contact with the sloped surface below the top surface of the OT. Become so. At this time as well, since the fulcrum 13a is supported in contact with the chevron-shaped protrusion, the interlock lever is prevented from swinging, and the interlock lever is in a locked state.

When the right push button pressing blade is released, the push button 2 is automatically returned to its original position by the force of the spring 5. At this time, the interlock lever whose tip is fitted to the push button is also returned to its original position by the push action of the spring 14 whose lower end is supported by the support rod 12, and the sixth
The state returns to the state shown in Figure (A).

Note that when the left push button is pressed down, the operation is opposite to the above operation, and the right push button is similarly locked in the first stage operation and the second stage operation.

Further, FIGS. 7 to 10 show embodiments in which the shape and support method of the interlock lever are different.

In this embodiment, the structure of the main body 1 of the push button switch into which the two push buttons 2, 2 are inserted is the same as the embodiment shown in FIG. 1 except for this interlock lever, so the same members are given the same reference numerals. is marked, but detailed explanation thereof will be omitted.

The interlock 8-13 and its support in the embodiment of FIG. 7 are shown in FIG. Support shafts], 3d, and 13d are horizontally protruded from both sides of the center of the second part of the X, and when the X is inserted into the groove 10, the support shafts 13d.

13 (" indicates the groove of the support guide 11..11] 1a, 13a
A fulcrum 13a is fitted in the groove 10 and is swingably supported, and protrudes from the center of the lower end. 15, and the elastic force of this spring 15 is transferred to the support shaft 13d.
, so that X is slightly raised to ``2''. Therefore, like the spring 14 used in the first embodiment, this spring 5 may be weak enough to cancel out the weight of X i 3. Furthermore, as shown in the figure, a leaf spring may be used in addition to the coil spring. The spring 15 may receive the support shaft 13('' of X with a support 16 interposed as shown in the figure), or the spring 15 may directly support the support shaft 1.3d.

The operation of the second embodiment shown in FIG. 71a will be explained based on FIG. 9. As shown in FIG.
When the right push button 2 is pressed down to perform the first operation from the F state as shown in Figure 13), the interlock lever whose tip is inserted into the push button responds to the push of the right push button. ] 3 is supported by the support shaft 13c+ within the groove of the support guide, and although this lever 13 does not move downward, both the right sides are pushed down and the left side is pushed down, as if It tilts like a seesaw. Even if an attempt is made to push the left push button 2 in this state, the lower part of the interlock lever is supported by the fulcrum 13a and the chevron-shaped protrusion 1.0 T, so the left push button cannot be pushed down. That is, the left push button 2 is in an interlocked state.

Further, when the right push button 2 is further pressed down to perform the second step operation (second action), the state shown in FIG. 3(C) is obtained.

In other words, when the interlock lever is pushed further downward than the state shown in FIG. 5B, the fulcrum 13a is pressed against the chevron-shaped protrusion by an even stronger force due to the lowering of the right push button. As a result, the fulcrum 13a of the lever [3] moves to the push button side, that is, to the left, so that the fulcrum 13a of the lever [3] presses down on the inclined surface of the OT, and is brought into contact with and supported at the inclined surface position below the left side of the top surface of the chevron-shaped projection 10T. Become J: Become. In this poem as well, the fulcrum 13a is supported in contact with the chevron-shaped protrusion, so that the interlock lever is prevented from swinging, and the left press button is in a locked state.

When the right push button pressing blade is released, the push button 2 is automatically returned to its original position by the force of the spring 5. At this time, the support shaft of the interlock lever whose tip is fitted to the push button is also returned to its original position by the upward force of the spring 15 whose lower end is supported within the groove 11a of the support guide, returning to the state shown in FIG. It is something.

Note that when the left push button is pushed away, the operation is opposite to that described above, and the right push button is similarly locked in the first and second step operations.

〔Effect of the invention〕

The present invention is a push button switch provided in a main body so that two opposing push buttons can be pressed down, and a groove is formed in the main body and between both push buttons into which an interlocking lever that swings like a seesaw is fitted. The tips of the interlock levers were fitted and locked onto the inner surfaces of the respective push buttons, and a protrusion that served as a fulcrum was formed at the center of the lower surface of the interlock levers, and a protrusion was formed on the inner bottom surface of the groove into which the levers were fitted. The protrusion is supported by a chevron-shaped protrusion as a fulcrum, and this interlock lever is provided with a return spring that always pushes it upward, so that when the push button is pressed, the fulcrum of the lever receives this. Even if it moves along the slope of the chevron-shaped protrusion and tilts, it will easily and reliably return to its original position due to the action of this spring.
Reliable interlocking can be performed, and since the interlocking range is wide, the switch can be opened even in one-step or two-step operation, and has advantages such as improved operability and reliability.

[Brief explanation of drawings]

What is shown in FIGS. 1 to 6 is a first embodiment, in which FIG. 1 is a longitudinal sectional view showing an interlock device for a push button switch of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a plan view of the same. , FIG. 4 is a bottom view of the same, FIG. 5 is an explanatory diagram of the operating sequence, FIG. 6 is a partially broken external view of the interlock lever, and FIGS. 7 to 1.
Figure 0 shows a different second embodiment of the interlock lever, Figure 7 is a longitudinal sectional view, Figure 8 is a partially cutaway external view of the interlock lever, and Figure 9 is an explanation of the operating order. 10 are explanatory diagrams depicting a portion where the interlock lever is supported by a spring, corresponding to the operating sequence shown in FIG. 9. 1 is the main body, 2 is the push button, 10 is the groove, 11 is the support guide,] 1. a is a groove, 12 is a support rod, 13 is an interlock lever, and 14 and 15 are springs. Figure 3 Figure 4

Claims (2)

[Claims] (1) Two push buttons facing each other are provided in the main body so that they can be pressed down, and a groove is formed in the main body between the two push buttons to fit an interlock lever that swings like a seesaw. In a push button switch in which the tips of the levers are fitted and locked to the inner surfaces of the respective push buttons, a protrusion serving as a fulcrum is formed at the center of the lower surface of the interlock lever, and a support rod is inserted into a hole penetrating the lever. The support rod is inserted into the main body, and a spring is interposed between the support rod and the top surface of the hole to push down the lever, and the chevron-shaped protrusion that supports the interlock lever protrusion as a fulcrum is used as an interlock of the main body. An interlock device for a push button switch, characterized in that the interlock device is formed on the inner bottom surface of a lever insertion groove. (2) Two push buttons facing each other are provided in the main body so that they can be pushed down, and a groove is formed in the main body between the two push buttons to fit an interlock lever that swings like a seesaw. In a push button switch in which the tip of the lever is fitted and locked to the inner surface of the push button, a protrusion serving as a fulcrum is formed at the center of the lower surface of the interlock lever, and a support shaft protruding from both sides of the upper center of the lever. is inserted into the groove of the support guide and supported so as to be able to swing like a seesaw, and a spring is interposed in the support guide to push up the support shaft of the lever from below, and the protrusion of the interlock lever is supported as a fulcrum. An interlock device for a push button switch, characterized in that a chevron-shaped protrusion is formed on the inner bottom surface of an interlock lever insertion groove of the main body.