JPH0421973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an interlocking pushbutton switch with simultaneous lock prevention used in various electronic devices.

Conventional Structures and Their Problems In general, interlocking pushbutton switches with simultaneous lock prevention are constructed as shown in A and B in FIGS. 1 and 2. That is, the interlocking push button switches 1a, 1
A simultaneous lock prevention piece 4 is provided between the operating bodies 2a and 2b, which slides when the cam portions 3a and 3b provided on the operating bodies 2a and 2b are pressed. , 2b causes the simultaneous lock prevention piece 4 to slide left and right, so that an interlocking operation is performed. However, the two operating bodies 2 and 2 at the same time
When a and 2b are pressed, the simultaneous lock prevention piece 4 locks the cam portions 3a and 3b of the two operating bodies 2a and 2b.
until the interlocking plate 6 locks the corresponding interlocking cam parts 5a and 5b.
A and 2b cannot be pushed in and will not lock at the same time.

However, since such an interlocking push button switch with simultaneous lock prevention is constructed as shown in FIGS. 1 and 2, when the operating bodies 2a and 2b are pressed simultaneously, the simultaneous lock prevention piece 4 It has a structure in which the cam parts 3a, 3b are in contact with each other, and the mechanical pressing strength is increased by the simultaneous lock prevention piece 4 and the cam parts 3a, 3b.
3b, there is naturally a limit to the pressing strength, and it is difficult to withstand a large pressing strength. In addition, since the cams 3a and 3b are structured to be pushed to the left and right by the simultaneous lock prevention piece 4, when a large pressing load is applied, the operating body 2 will not be locked at the same time by the interlocking plate 6.
Window hole side wall 7 of mounting plate 7 guiding a, 2b
In fact, it became unstable because it was likely to get stuck in a and become locked at the same time.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks, and provides a highly reliable interlocking pushbutton switch with a simultaneous lock prevention mechanism that can improve the pressing strength to prevent simultaneous locking.

Structure of the Invention In order to achieve the above object, the interlocking push button switch of the present invention has a plurality of interlocking plates mounted on a mounting plate, a cam portion, and a plurality of push buttons attached to the upper part of an operating body interlocking with the interlocking plate. A push-button switch is arranged, and there is another cam section between the push-button switches, an operating body that automatically returns to its original position with a coil spring and interlocks with an interlocking plate, and a rocking cam that can swing on the upper part of this operating body. A simultaneous lock prevention unit provided with a lock is mounted on the mounting plate, and a push button of the push button switch is engaged with a swing cam of the simultaneous lock prevention unit.

With this configuration, the swing cam and spring provided on the operating body of the simultaneous lock prevention unit can withstand a large pressing operation, and the interlocking operation can be made smooth and highly reliable.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 7.
This will be explained using figures.

8a and 8b are interlocking push button switches, 9 is a simultaneous lock prevention unit, and a mounting plate 10 having a window hole.
is attached to. Reference numeral 11 is movable in a direction perpendicular to the operating direction of the operating bodies 12a, 12b of the interlocking push button switches 8a, 8b, and the operating bodies 12a, 1
This is an interlocking plate mounted so as to be able to come into contact with interlocking cams 13a and 13b provided on 2b. Reference numeral 14 denotes a rocking cam that is disposed in a recess 16 provided above the operating body 15 of the simultaneous lock prevention unit 9. Interlocking cam 17
is provided. Buttons 18a and 18b are press-fitted into the operating bodies 12a and 12b of the interlocking pushbutton switches 8a and 8b, and a swing cam 14 provided in the simultaneous lock prevention unit 9 is located at the lower side of the buttons 18a and 18b. Cam portions 19a and 19b are provided that allow smooth rocking. Reference numeral 20 denotes a release spring incorporated in the operating bodies 12a, 12b, and 15.

The operation of the interlocking push button switch configured as described above will be explained below. FIG. 4 shows the release state of the interlocking pushbutton switches 8a, 8b and the simultaneous lock prevention unit 9. In this state, as shown in FIG. 5, the button 18a of the interlocking push button switch 8a,
When the operating body 12a is pressed down, the interlocking cam 13
a causes the interlocking plate 11 to move in the direction of arrow A, and the cam portion 19a of the button 18a causes the swing cam 14 of the simultaneous lock prevention unit 9 to swing. When pushed down further, the interlocking push button switch 8a becomes locked by the interlocking cam 13a, and then in this state, the sixth
As shown in the figure, when the button 18b of the other interlocking push-button switch 8b and the operating body 12b are pressed down, the interlocking plate 11 moves in the direction of arrow B in the same manner as described above, the interlocking push-button switch 8a is released, and the interlocking push-button switch 8 is released.
b becomes locked.

The above is the interlocking operation of the interlocking pushbutton switches 8a and 8b. Next, the operation of the simultaneous lock prevention unit 9 will be explained. From the release state of FIG. 4, the interlocking push button switches 8a, 8 are switched as shown in FIG.
When buttons b are pressed down at the same time, the interlocking cam 13a moves the interlocking plate 11 in the direction of arrow A, and the cam portions 19a and 19b of the buttons 18a and 18b move the swing cam 14 and operating body 15 of the simultaneous lock prevention unit 9. Pushed down. Even if they are pressed down further, the interlocking cam 17 of the simultaneous lock prevention unit 9 urges the interlocking plate 11 in the direction of arrow B, so the interlocking pushbutton switches 8a and 8b are not simultaneously locked.
As shown in Fig. 8, when the pressing operation is stopped, the operating body 12
Release spring 20 incorporated in a, 12b, 15
The operating bodies 12a, 12b, 15, buttons 18a,
18b is returned upward and returns to the original release position shown in FIG. 4, and the operation of the simultaneous lock prevention unit 9 is completed.

As described above, according to the embodiment of the present invention, by simply arranging the simultaneous lock prevention unit 9, the interlocking cam 17 and the swinging cam 14 provided on the operating body 15 can be
As a result, the interlocking pushbutton switches 8a and 8b can be operated smoothly, and a simultaneous lock prevention mechanism that can withstand large pressing operations can be created.
It can be made highly reliable.

Effects of the Invention As described above, the interlocking pushbutton switch of the present invention has a structure in which the interlocking plate is driven by a cam provided on the operating body of the simultaneous lock prevention unit, so when multiple pushbutton switches are pressed simultaneously, the operating body The push button switch is reliably maintained in the unlocked state by the cam provided at the top, and when another push button switch is pressed while one push button switch is locked, the other push button switch is locked by the swing cam. If the pressure is continued further, this pressing force will be absorbed by the spring of the simultaneous lock prevention unit, and the swing cam will be able to withstand a greater pressure force than the swing cam alone. When the operating body is pressed, an interlocking cam provided on the operating body of the simultaneous lock prevention unit drives an interlocking plate to release the lock of the push button switch. That is, when a push button switch is locked due to an erroneous operation, it is generally done to release the lock by lightly pressing another switch. However, in case of an emergency, it may be difficult to respond, but the interlocking pushbutton switch of the present invention maintains the locked state and presses another pushbutton switch to move the operating body of the simultaneous lock prevention unit downward and press the button. It is possible to provide a highly useful interlocking push button switch that can be extremely easily unlocked.

[Brief explanation of drawings]

Figure 1A is a partially cutaway front view of the conventional interlocking pushbutton switch showing the locked state, Figure 1B is a rear view of the same partially cutout, and Figure 2A is a prevention of simultaneous locking of the same interlocking pushbutton switch. FIG. 2B is a partially cutaway front view of the main part showing the mechanism, FIG. 5 and 6 are partial sectional views showing the locking operation of the same switch, and FIGS. 7 and 8 show the simultaneous locking prevention operation of the simultaneous locking prevention unit of the same switch. FIG. 8a, 8b...Interlocked push button switch, 9...Simultaneous lock prevention unit, 10...Mounting plate, 11...
Interlocking plate, 12a, 12b... operating body, 13a, 1
3b... Interlocking cam, 14... Rocking cam, 15...
Operating body, 16... recess, 17... interlocking cam, 18
a, 18b... button, 19a, 19b... cam part,
20...Release spring.

Claims (1)

[Claims] 1 A plurality of push button switches consisting of an interlocking plate attached to a mounting plate, an operating body having at least an interlocking cam portion for driving the interlocking plate, and a push button attached to the upper part, and a rocker driven by at least the push button. A simultaneous lock mounted on the mounting plate, comprising another operating body provided between a moving cam and another cam for driving the interlocking plate, and a spring for returning the other operating body upward. An interlocking push button switch consisting of a prevention unit.