JPH038047B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push button switch, and an object of the present invention is to provide a push button switch having two push buttons suitable for operating three switches.

Generally, in a switch for electric equipment, there are three operation buttons for forward rotation, stop, and reverse rotation, respectively, or two operation buttons, one for forward rotation and one for stop and reverse rotation. A device that performs two operations is often used, and in the case of the latter two operation buttons, for example, pressing the button lightly will stop it, and pressing it even harder will activate a reverse switch.
They are used differently depending on the strength of the operating force.

In this switch operation configuration where two operation buttons perform the three operations described above, if an induction motor is used as the power source, the motor suddenly stops during forward rotation and the reverse button is pressed hard. The switch instantly changes from normal rotation to reverse rotation, but the motor continues to rotate in the normal direction, which is contrary to the operator's wishes. Therefore, for example, in a document shredding machine that uses an induction motor as a power source and rotates forward and reverse, such a switch cannot be operated using two operation buttons.

The present invention aims to provide a switch operating device that solves these problems, and an embodiment thereof will be described below with reference to the drawings.

In the figure, 1 is a first push button, and 2 is a second push button, which are connected to the ends of the first and second operating rods 3 and 4, respectively. the first and second operating levers 3;
4 are arranged in parallel, and their ends engage with the first and second switches 5 and 6, respectively, so that when the operating rods 3 and 4 are pushed in, the switches 5 and 6 are individually closed. In this example, the first
The second switch 5 is used for forward rotation of the motor, and the second switch 6 is used for reverse rotation of the motor. First and second protrusions 7 and 8 protruding laterally are provided at the midsection of each of the operating rods 3 and 4, and the frame 9 slides under the pressure of the protrusions 7 and 8. A sliding plate 10 is slidably held therein. That is, the sliding plate 10 has a first inclined part 11 on the upper edge thereof corresponding to the lower part of the protrusion 7 of the first operating rod 3, and the sliding plate 10
has a second inclined portion 12 corresponding to the lower part of the protruding piece 8 of the second operating lever 4 in a state in which it is slid by the first operating lever 3; A push-in restriction portion 13 for the second operating rod 4 is provided on the side opposite to the movement of the inclined portion 12 . Note that this push-in regulating portion 13 is formed by an edge higher than the other upper edge 14 of the sliding plate 10. In addition, the first
The inclined portion 11 is formed with a lock recess 15 that extends to the inclined end thereof. 16 in the figure is the sliding plate 1
0, 17 is a member that supports the operating rods 3 and 4, and 18 and 19 are springs for returning the operating rods 3 and 4 to upward movement.

The push button switch device of the present invention is constructed as described above, and when the first push button 1 is pressed in the state shown in FIG.
The sliding plate 10 moves in the X direction, and the first operating rod 3 is further pushed down to close the first switch 5 and rotate the motor in the normal direction. At this time, as shown in FIG. 2, the sliding plate 10 is returned in the Y direction by the spring 16, causing the lock recess 15 to engage with the first protrusion 7, and the first operating rod 3 to be pressed down. and maintain normal rotation of the motor.

Next, in the state shown in FIG. 2, if the motor is to be stopped, the second push button 2 is pressed. By operating this push button 2, the second operating rod 4 moves downward, and the protruding piece 8
pushes the second inclined part 12, so that the sliding plate 1
0 slides in the X direction. By this sliding of the sliding plate 10, the engagement between the protrusion 7 of the first operating rod 3 and the lock recess 15 of the sliding plate 10 is released, and the first operating rod 3 returns to its upward movement. Since the first switch 5 is opened, the motor stops.

The second push button 2 is also used for reverse rotation, and by pressing it deeply, the second switch 6 is closed, thereby reversing the motor. When the first operating rod 3 is pressed down and the first switch 5 is closed, even if you try to push down the second operating rod 4 deeply, the second protrusion 8 prevents the pushing. It hits part 13 and cannot be pressed down deeply.
Therefore, the second switch 6 is not actuated and there is no reversal operation of the motor. In other words, it is not possible to immediately switch the motor to reverse rotation when the motor rotates normally. In order to operate the second switch 6 for reversing the motor, first move the first operating rod 3 upward as shown in FIG. Only in the stopped state can the second actuating rod 4 be pushed down deeply.

In this way, in the push button switch device of the present invention, when switching from forward rotation to reverse rotation of the motor, the reverse switch can be operated after the motor has been switched to a stop. This solves the problem of the inability to switch the rotational direction, which occurs with this type of switch, and it is useful as a switch of this type that allows three operations to be performed by operating two push buttons.

In the above embodiments, switching of the motor was explained, but the present invention is not limited to switching of the motor. For example, the present invention is not limited to switching of the motor. Needless to say, it can also be used for devices, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the push button switch device of the present invention, with FIGS. 1 and 2 being a plan view, and FIG. 3 being a sectional side view. 1...first push button, 2...second push button, 3...
1st operating lever, 4... 2nd operating lever, 5... 1st operating lever
switch, 6... second switch, 7... first switch
Projecting piece, 8... Second projecting piece, 10... Sliding plate, 1
1...First slope part, 12...Second slope part, 1
3...Pushing regulating portion, 15...Lock recess.

Claims (1)

[Claims] 1 The first and second push buttons, the first and second operation rods connected to the first and second push buttons and arranged in parallel with each other, and the pressing of the first and second operation rods, respectively. The first and second switches are operated, and a sliding plate is provided perpendicularly to the first and second operating rods and is biased in one direction. The operating lever is provided with a protruding piece that protrudes above the sliding plate, and the upper edge of the sliding plate is provided with a protruding piece that corresponds to the first protruding piece of the first operating lever. At the same time, a locking recess is provided for locking the inclined part and the protrusion that receive side pressure from the first protrusion when the first operating lever is pressed into lock. Correspondingly, a push-button switch device is provided with an inclined part that receives lateral pressure when the second operating rod is pushed in, and a push-in regulating part on the non-sliding side of the inclined part.