JPH0441551Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a push-button switch equipped with a plurality of push-button or piano-touch operation knobs. Concerning an interlocking mechanism for automatically returning all other operating knobs to their return positions by pushing in one operating knob so that only one switch is turned on and all other switches are turned off. It is.

<Prior Art> Generally speaking, a push button switch equipped with a plurality of operation knobs is designed so that when one of the operation knobs is pushed in, the other operation knobs automatically return to their return positions. Various types of interlocking mechanisms have been put into practical use. The most common of these interlocking mechanisms are a spring that applies a biasing force to each operating knob in the return direction, a locking means that holds the pushed operating knob in the pushed-in position, and a locking mechanism that holds the pushed-in operating knob in the pushed-in position. The locking means is provided with a release means for releasing the locking of the locking means with respect to the operation knob, and the locking means and the release means are interlocked with each other by a complex-shaped interlocking member.

<Problems to be solved by the invention> In the conventional example described above, the structure of the interlocking mechanism is complicated, resulting in high manufacturing costs and the possibility of malfunction due to wear or deformation of the interlocking member. There is a problem in that it is easy to occur and it is difficult to obtain highly reliable customers.

The present invention solves these problems and provides a push button switch that is simple in structure, requires low testing, and is unlikely to cause malfunctions such as two operation knobs being pushed into the push-in position at the same time and all operation knobs being returned to the return position. It was made with the purpose of providing.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a plurality of push-button operations supported by the main body case so as to be movable between a push-in position and a return position. A knob and a moderation mechanism for stopping each operating knob at the push-in position and the return position are provided, and a seesaw-shaped interlocking arm is provided for each of the above-mentioned operating knobs in combination with all other operating knobs. one end of the interlocking arm is arranged so as to correspond to the end of one operation knob, and the other end of the interlocking arm is arranged so that pushing one operation knob pushes up the other operation knob. Arranged in correspondence with the end of the other operating knob, one of the plurality of operating knobs is always in the pushed-in position and all the other operating knobs are in the pushed-up return position. It is characterized by the presence of

<Operation> In other words, in the present invention, when one operating knob is pushed in by the seesaw-shaped interlocking arm, the other operating knob is pushed up, and the moderation mechanism moves one of the operating knobs to the pushed-in position. The other is each held in the return position. Therefore, only one operating knob is always in the pushed-in position, and pushing in two or more operating knobs at the same time is prevented, and no matter which operating knob is pushed in, the other operating knobs are always pushed in. This provides an interlocking function in which only one piece is always in the pushed-in position after returning to the return position.

<Example (1)> The present invention will be specifically described below with reference to illustrated examples.

FIGS. 1 to 3 show a first embodiment showing a basic structure. As shown in the external front view of FIG. , 2b, 2c, 3a, 3b, and 3c are provided. Therefore, the operation knobs 2a, 2b, 2c
One group in which three of these are interlocked with each other is
The three members a, 3b, and 3c each form another group that interlocks with each other.

FIG. 1 is a cross-sectional view showing the structure of the operating knobs 2a, 2b, and 2c, and illustrates a state in which the operating knob 2c is pushed in. Each operation knob 2a, 2
b, 2c are inserted into support holes 4 formed in the main body case 1 so as to be movable in the longitudinal direction, and are supported by the operation knobs 2a, 2c at the bottom of the main body case 1.
A fixed contact plate 6 is fixed with fixed contacts 5 corresponding to b and 2c, and a movable contact plate 8 is provided with movable contacts 7 corresponding to each fixed contact 5 on its upper surface.
is located. The fixed contact plate 6 is made of, for example, a hard printed wiring board, and the movable contact plate 8 is made of, for example, a rubber sheet or a flexible printed wiring board.

A moderation mechanism 11 is provided between each of the operating knobs 2a, 2b, 2c and the main body case 1 for stopping the operating knobs 2a, 2b, 2c at the push-in position and the return position. That is, the moderation mechanism 11 inserts a spring 13 and a ball 14 into a recess 12 provided to open on the side surface of each operation knob 2a, 2b, 2c, and correspondingly inserts a spring 13 and a ball 14 into each support hole 4 of the main body case 1. There is a moderation groove 15 on the side wall and moderation grooves 16 and 17 above and below it.
The operating knob 2
When a, 2b, and 2c are pushed in, the ball 14 moves into the moderation groove 1.
7 and held in the pushed-in position, and when the ball 14 returns to its original position, the ball 14 engages with the moderation groove 16 and is held in the returned position. Then, at the push-in position, the tips 18 of each operating knob 2a, 2b, 2c
The dimensional relationship between each member is set so that the movable contact plate 8 is pressed and the movable contact 7 comes into contact with the fixed contact 5, and the contact points 7 and 5 are open at the return position, thereby opening and closing the switch. It is done.

21a, 21b, 21c are seesaw-shaped interlocking arms provided inside the main body case 1,
It is swingably supported by the case body 1 by a shaft pin 22, and the interlocking arm 21a is connected to the operation knob 2a,
2b, the interlocking arm 21b is the operating knob 2.
b, 2c, and interlocking arms 21c are provided corresponding to the operation knobs 2c, 2a, respectively. In other words, each operating knob is connected to all other operating knobs.
A seesaw-shaped interlocking arm is arranged for each pair of operation knobs that are combined one by one. Each of the operation knobs 2a, 2b, 2c is provided with a pushing part 23 by forming a stepped part near the tip.
Each interlocking arm 21a, 21 is attached to these pushing parts 23.
b, 21c so that the ends 24 are in opposing positions, and when one of the corresponding operating knobs is in the push-in position and the other is in the return position,
The dimensions and arrangement of each member are selected so that each member 4 comes into contact with each pushing portion 23 of the corresponding operation knob. FIG. 3 shows operation knobs 2a, 2b, 2c,
FIG. 3 is a developed view showing a combination of interlocking arms 21a, 21b, 21c, a fixed contact 5, a movable contact 7, etc. constituting a switch, and a relationship in their mutual arrangement.

It is configured as described above, and now the operation knob 2
If you press c, ball 1 will be released as shown in Figure 1.
4 engages with the lower moderation groove 17, the operation knob 2c is held in the pushed-in position, and the contacts 5 and 7 directly below are turned on. At the same time, the right end portions 24 of the interlocking arms 21b and 21c are pushed down by the pushing portion 23, and each arm 21b, 21c swings clockwise to raise the left end portion 24, and the operating knobs 2a,
2b that is in the pushed-in position is pushed up, and the ball 14 engages with the moderation groove 16 on the upper surface and is held in the return position, and the contacts 5 and 7 located directly below are turned off. Further, the operating knob that was in the return position from the beginning remains in the return position, and the contact directly below it remains off. Even when one of the other operation knobs 2a, 2b is pushed in, the other operation knob returns to the return position or is maintained at the return position by the same operation. In this way, an interlocking operation is performed in which only the pushed-in operating knob is in the pushed-in position and all the remaining operating knobs are in the return position. Therefore, among the plurality of push button switches constituting one linked group, one is always on and all the other switches are off.

<Embodiment (2)> Figures 4 and 5 show a second embodiment, and show an example in which the moderation mechanism is provided in the interlocking arm.

That is, a slider 29 provided with operation knobs 2a, 2b, and 2c is movably supported within the main body case 1, and two upper and lower pushing parts 23 are protruded from the side surface of the slider 29. Main case 1
An interlocking mechanism 33 between the partition plate 30 and the outer plate 32 projects from a long hole 31 provided in the partition plate 30 . The interlocking mechanism section 33 includes interlocking arms 21a, 21.
b and 21c are movably supported by a shaft pin 22 provided on the partition plate 30, and are vertically shifted so as not to interfere with each other. Further, each interlocking arm 21a, 21b, 21c is provided with a recess 12 into which a spring 13 and a ball 14 are inserted, and a moderation ridge 15 is protruded from the partition plate 30 correspondingly. 11 are configured. A downward biasing force is applied to the slider 29 by a spring 34 so that the pushing portion 23 comes into contact with the end portion 24 of the interlocking arm. The movable contact 7 is held on the side surface of the slider 29 and is brought into elastic contact with a fixed contact member 36 by a contact spring 35, thereby forming a slide switch.

This embodiment has the above-mentioned structure. For example, when the operation knob 2a is pushed in, the interlocking arms 21a and 21c are reversed in a counterclockwise direction by the pushing part 23, and are moved from the pushed-in position until now. As the operating knob 2c is pushed up to the return position, the moderation mechanism 11
The ball 14 gets over the moderation mountain 15 and the operating knob 2
a is held at the push-in position, and the operation knobs 2b and 2c are held at the return position. FIG. 4 shows the state at this time. In addition, the operation knobs 2b, 2c
Similarly, when pushed in, the other operating knobs are in the return position, and only one operating knob is in the pushed-in position.
All of the remaining operation knobs are in their return positions in an interlocking manner.

<Embodiment (3)> FIGS. 6 and 7 show a third embodiment, in which the interlocking arm is shaped like a link.

That is, each interlocking arm 21a, 21b, 21
C is a link that connects the corresponding pushing parts 23, and the pushing parts 23 are inserted into holes 24a provided in the end parts 24. The internal dimensions of each hole 24a in the vertical direction are such that one is selected to allow the pushing part 23 to be inserted without any play, and the other is selected to be enlarged upward by the vertical stroke of the operating knob. It is being Further, the moderation mechanism 11 is provided between the slider 29 and the fixed contact member 36, and an upward biasing force is applied to the slider 29 by a spring 37 to prevent rattling.

This embodiment is configured as described above, and the sixth
For example, when the operating knob 2b is pushed in in the state shown in the figure, the interlocking arm 21b swings counterclockwise to push up the operating knob 2c, and accordingly, the interlocking arm 21c also swings counterclockwise. However, since the inner dimension of the hole 24a at the left end of the interlocking arm 21c is enlarged upward, the pushing part 23 of the operation knob 2a inserted therein will not be pushed downward.
Further, since the inner dimension of the hole 24a at the right end of the interlocking arm 21a is enlarged upward, the pushing part 23 of the operating knob 2b inserted into the hole 24a can move downward within the hole 24a, and the interlocking arm 21a can sing. The operating knob 2a, which cannot be moved and therefore has been at the return position, remains as it is. Further, when the operation knob 2a is pushed in in the state shown in FIG. 6, the interlocking arms 21a and 21c swing counterclockwise, and the operation knob 2c is pushed up. However, the hole 24a at the right end of the interlocking arm 21a
has an inner dimension expanded upward, and the pushing part 23 of the operation knob 2b inserted therein is not pushed up or down, and the hole 24a at the right end of the interlocking arm 21b is expanded upward. Since it has an enlarged inner dimension, the pushing part 23 of the operating knob 2c inserted therein only moves upward within the hole 24a, but the interlocking arm 21b does not move, and therefore returns to the return position. The hot operation knob 2b remains as it is. The operating knob 2c pushed up in this way moves the ball 14 upward over the moderation crest 15 and is held at the return position as shown by the broken line in FIG. , and 1
An interlocking operation is performed in which only one operating knob is in the pushed-in position and all the remaining operating knobs are in the return position.

Note that the above embodiments are all for the case where there are three operation knobs, but when there are three or more operation knobs, for example, when there are four operation knobs, six (= ₄ C ₂ ) interlocking arms are used. This allows a similar interlocking mechanism to be constructed. Further, in each of the embodiments, the interlocking arm is supported by a shaft pin, but other support structures may be adopted, such as one using a combination of a V-notch and an edge, without using a shaft pin.

<Effects of the invention> As is clear from the description of each embodiment above, the present invention is one in which a plurality of operating knobs are interlocked by a combination of seesaw-shaped interlocking arms, and one
An interlocking mechanism in which only one operation knob is in the pushed-in position and the others are always in the return position can be constructed with a simple structure, the manufacturing cost is low, and the movement due to deformation or wear of the component parts is possible. This has the advantage of providing a push button switch that is less prone to defects.

[Brief explanation of drawings]

Fig. 1 is a sectional view of one embodiment, Fig. 2 is a front view showing the same external appearance, Fig. 3 is a developed view showing the mutual relationship of the main components, and Fig. 4 is an interlocking mechanism of another embodiment. 5 is a sectional view taken along the line B-B in FIG. 4, FIG. 6 is a side view of the interlocking mechanism of another embodiment, and FIG. 7 is a sectional view taken along the line C-C in FIG. 6. be. 1... Body case, 2a, 2b, 2c... Operation knob, 11... Moderation mechanism, 14... Ball, 15
... Moderation mountain, 21a, 21b, 21c ... Interlocking arm, 23 ... Pushing part, 24 ... End part.

Claims (1)

[Scope of utility model registration request] A plurality of push-button operating knobs supported by the main body case are provided so as to be movable between a pushed-in position and a return position, and a moderation mechanism is provided to stop each of these operating knobs at the pushed-in position and the return position,
And, each of the above operation knobs is connected to all other operation knobs.
A seesaw-shaped interlocking arm is arranged for each of the combinations, and one end of each interlocking arm is connected to the end of one operation knob so that pushing one operation knob pushes up the other operation knob. and the other end of the interlocking arm is arranged to correspond to the end of the other operating knob, so that one of the plurality of operating knobs is always in the pushed-in position and the other is in the depressed position. A push-button switch characterized in that all operation knobs are in a pushed-up return position.