JPH0738289B2 - Multi push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides four push buttons symmetrically around a push button switch body, and when any one push button is depressed,
The present invention relates to a multi-push button switch in which the safety of operation is improved by making it impossible to push down other push buttons.

[Prior Art] Pendant switches are used in hoists and cranes.

This pendant switch has two or more push buttons arranged in the housing so that operations such as traveling, stopping, and hoisting of the crane can be operated.

[Problems to be Solved by the Invention]

However, in the conventional push button switch, one or more push button switches (push button units) having two push buttons are arranged and stored in a single row in a single cabinet, so that the cabinet becomes long and long. However, it has not been possible to make the operation dependent among a plurality of push button switches, that is, when the push button of one push button switch is pushed down, the push button of the other push button switch cannot be pushed down.

It is an object of the present invention to provide a multi-pushbutton switch which is provided with four pushbuttons in one pushbutton switch and which is downsized and which can improve the safety of operation of each pushbutton.

[Means for Solving the Problems]

In order to achieve the above object, the multi-push button switch of the present invention has a support projection protruding from a recess formed in the central portion of a push button switch main body having four push buttons at symmetrical positions on the periphery, and a top surface is formed in the recess. An interlock piece with a concave bottom surface is inserted into the pyramid surface, and is supported tiltably by a support protrusion, and a push piece is projected on the push button so as to face each conical surface of the interlock piece. What is done is summarized.

[Action]

When any one of the push buttons is pushed down, the push piece protruding from the pushed push button pushes down the push button side of the interlock piece, and the interlock piece tilts with the support projection as a fulcrum.

As a result, the interlock piece becomes higher at a position other than the push button that was pushed down, and the push pieces protruding from the other three push buttons and the interlock piece come close to each other, so that push buttons other than the push button that was pushed down are pushed down. It becomes impossible and the interlock works.

〔Example〕

The multi-push button switch of the present invention will be described below based on the illustrated embodiment.

In the figure, reference numeral 1 is a push button switch body, and push button insertion ports 11 for inserting the push buttons 2 are formed at symmetrical positions on four sides of the periphery of the push button switch body 1, respectively, and a movable contact K1 is provided at each of these four push button insertion ports 11. The push button 2 provided is inserted so as to receive the biasing force of the spring 3.

A fixed contact K2 is provided at a position facing the movable contact K1 of each push button 2 of the switch body 1, and the push button 2 is pushed down against the spring 3 so that the contacts K1 and K2 come into contact with each other to close the circuit. And release the pressing force, the push button 2
To reset and release the circuit.

Note that this structure is similar to the conventional push button switch of this type (for example, Japanese Utility Model Publication No. 59-29309 and Japanese Utility Model Publication 59-293).
(See Japanese Patent No. 10).

Further, as shown in detail in FIG. 7, the push button 2 is provided with a horizontally wide flat plate-shaped push piece 21 protruding in the horizontal direction on one side surface. This push piece
When the push button 2 is inserted into the switch body 1, the reference numeral 21 is directed toward the inside.

A recess 12 is formed in the center of the switch body 1, and the recess 12
A conical support projection 13 is provided on the inner bottom surface of the center of the. It is desirable that the tips of the support protrusions 13 have a hemispherical shape.

The interlock piece 4 supported by the support protrusion 13 is
As shown in FIG. 1, FIG. 2 and FIG. 4, it has a size that can be inserted into the recess 12, and the central portion of the upper surface is the highest,
The bottom surface of the pyramidal surface 42 is the lowest, and the bottom surface is formed as a concave surface 41 having a depressed center. The tip of the supporting protrusion 13 is brought into contact with the concave surface 41 so that the interlock piece 4 can be tilted in all directions. Stable support.

The push piece 21 of each push button 2 faces the conical surface 42 of the interlock piece 4 supported so as to be tiltable. Therefore, when any one of the push buttons 2 is pushed down, the push piece 21 protruding from the pushed push button 2 pushes down the push button side of the interlock piece 4, and the interlock piece 4 tilts with the support projection 13 as a fulcrum. .

As a result, at positions other than the push button 2 that was pressed down,
The interlock piece 4 becomes high, and the push pieces 21 protruding from the other three push buttons 2 and the interlock piece 4 come close to or contact with each other, so that the push buttons 2 other than the push button 2 that has been pushed down cannot be pushed down. The lock will work. This state is shown in FIG.

〔The invention's effect〕

According to the present invention, one pushbutton switch (unit) has four switches.
Since one push button is provided, the switch can be downsized when applied to a pendant switch of a crane or the like.

Further, among the four push buttons, the push buttons other than the push button that has been pressed can be made impossible to push down, and the safety of operation can be improved.

Further, by forming the upper surface of the interlocking piece into a quadrangular pyramid surface and the bottom surface into a concave surface with a depressed center, the interlocking piece can be stably supported by the support protrusion and the push button can be operated smoothly. You can

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which one push button is pushed down, FIG. 2 is a plan view, FIG. 3 is a cross-sectional plan view of a push button switch body, FIG. 4 is a vertical sectional front view, and FIG. 5 is a front view. FIG. 6 is a bottom view, and FIG. 7 is an external view of the push button. 1 is a push button switch body, 12 is a depression, 13 is a support protrusion, 2 is a push button, 21 is a push piece, 3 is a spring, 4 is an interlock piece, 41
Is a concave surface and 42 is a quadrangular pyramid surface.

Claims (1)

[Claims] 1. A support projection is provided in a recess formed in a central portion of a push button switch main body having four push buttons at symmetrical positions around the periphery, and a top surface is a quadrangular pyramid surface and a bottom surface is a center recess in the depression. A multi-push button switch, characterized in that an interlock piece formed in a concave surface is inserted and supported by a support projection so as to be tiltable, and a push piece is provided on a push button so as to face each conical surface of the interlock piece.