JPS5927000Y2 - Interlocking switch non-lock release mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a non-lock release mechanism for an interlocking switch that has a simple structure, stable and reliable operation.

Conventionally, for example, interlocking switches used in pushbutton telephones have been used to lock the lock switch and use the call circuit, and when this circuit was to be temporarily put on hold, a non-lock release switch was operated to form a hold circuit. After that, it is necessary to restore the lock switch that is in the locked state.
Equipped with a non-lock release mechanism that releases the locked state of the lock switch during recovery operation.

In this non-lock release mechanism, the cam is generally supported pivotally by an interlocking plate, which is locked at the stop position by a recovery spring, and the slanted protrusion provided on the key of the non-lock release switch is used when the non-lock release switch is operated by finger pressure. rotates only the cam without operating the interlocking plate,
The cam is restored near the stop of the non-lock release switch, and when the non-lock release switch is restored, the inclined protrusion of the key moves the interlocking plate together with the cam without rotating the cam, and the lock switch is in the locked state. Configured to restore.

However, in such a configuration, since the frictional resistance between the cam and the inclined protrusion is large, a large operating force is required, resulting in poor operability.

The present invention has been improved in view of the conventional drawbacks mentioned above, and the purpose is to provide a non-lock release mechanism for interlocking switches that has a simple structure and can improve operability and reliability. A window hole having a pin contact part is provided in the interlocking plate that locks the lock switch,
A crank piece that has a pin that engages in this window hole and is always biased in a direction in which the pin abuts the pin contact portion is rotatably attached to the non-lock release switch. The pin is configured to press and move the interlocking plate only during the recovery operation, thereby releasing the locked state of the lock switch.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view showing an embodiment of an interlock switch equipped with a non-lock release mechanism according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view.

In these figures, what is designated as a whole by reference numeral 1 is an interlocking switch, which is provided with a pair of side plates 2 and 3 facing each other.

Between the pair of side plates 2 and 3, a switch holding member 4 having a substantially U-shaped cross section and a terminal plate 5 that closes the rear opening of this switch holding member 4 are provided with protrusions 4 provided at both ends, respectively.
1 a , 41 b , and 51 a are fitted into retaining holes formed in the side plates 2 and 3 to be fixedly held.

horizontal upper and lower pieces 4 extending rearward of the switch holding member 4;
For example, six notches 6a are provided along the longitudinal direction in A and 4B.
~6f, 7a~7f (however, 7b~7f are not shown) are formed to face each other, and these notches 6a~6f, 7
5 lock switches 8a to 8e and 1 from the left on a to 7f
Non-lock release switches 9 are inserted and arranged so as to be slidable in the vertical direction.

In addition, each switch 8 is attached to the vertical piece 4C of the switch holding member.
Openings 10a-10f are formed corresponding to the switches 8a-8e, 9, and engaging protrusions 11 protrude from the front surfaces of the switches 8a-8e, 9 from these openings 10a-10f.
a to 11f (11C to 11e are not shown) protrude.

The engaging protrusions 11a to 11f are shaped like an inverted spade mark on a playing card.

The lock switches 8a to 8e and the non-lock release switch 9 are always urged upward by springs 12 mounted on their upper ends, and are prevented from coming off from the switch holding member 4 by a stepped portion 81 provided on the front surface. ing.

A large number of terminals 13 are connected to each switch 8a to 8 on the terminal board 5.
e and 9, and their tips are inserted into small holes for terminals drilled in the printed wiring board 14 arranged at the rear of the side plates 2 and 3, and the printed wiring board 14 connected to the call circuit and hold circuit wired to the

An interlocking switch 1 is provided between the terminal board 5 and the printed wiring board 14.
The connector 15 is inserted from below, and this connector 15
The contact pin 16 mounted on the switch 8a~
It is configured so that a predetermined terminal 13 among the terminal groups 8e and 9 comes into contact with each other.

Note that since the configuration of the connector 15 is not directly related to the present invention, a detailed explanation thereof will be omitted.

An interlocking plate 17 is further supported between the side plates 2 and 3 by fitting protrusions 17 a and 17 b provided on both sides of the interlocking plate into retaining holes formed in the side plates 2 and 3.

This interlocking plate 17 is located in front of the switch holding member 4 and is supported so as to be movable in the left-right direction, and on its upper edge there are engaging protrusions 11a-1 of each of the lock switches 8a-8e.
Five protrusions 18 a to 1 extending to the side of the flat end of 1 e
8e is provided.

Further, the interlocking plate 17 is moved in the direction of arrow A by the spring 19, that is, the protrusions 183 to 18e to the lock switch 8a.
- 8e are always urged in the direction of contacting the engaging protrusions 11 a - 11 e.

Further, an abbreviated shape is formed at the upper edge of the interlocking plate 17 at a position corresponding to the engaging protrusion 11f of the non-lock release switch 9, and the bent part on the inside thereof constitutes the pin contacting part 20. A window (L21) is provided.

On the other hand, the locking protrusion 1 of the non-lock release switch 9
A crank piece 22 is rotatably attached to 1 f, and a pin protruding from the tip of the crank piece 22 engages in the window hole 21 .

The pin 23 is normally pressed against the pin abutting portion 20 of the window hole 21 by being constantly urged upward by a crank spring 24 whose one end is locked to the interlocking plate 17.

Therefore, the crank piece 22 is connected to the crank spring 2.
4 gives a clockwise rotational habit in FIG.

The crank spring 24 includes lock switches 8a to 8e,
Non-lock release switch9. It has a spring force weaker than the spring force of the springs 12 and 19 that bias the interlocking plate 17 in a predetermined direction, and the crank piece 22 is normally held in an inclined state downward to the left.

Next, the operation of the above configuration will be explained.

As shown in FIG. 3a, for example, when the second lock switch 8b is pressed with a finger, the lock switch 8b
In order to descend against the force of the spring 12, the retaining protrusion 11
The left side surface of b contacts the protrusion 18b of the interlocking plate 17 and presses it to the left.

Therefore, the interlocking plate 17 is moved to the left against the spring 19.

When the lock switch 8b is further pressed, the protrusion 18b engages with the narrow portion 30 of the retaining protrusion 11b, so that the lock switch 8b is locked to the interlocking plate 17, forming a predetermined electric circuit.

If another lock switch, for example 8a, is pressed in this locked state, the interlocking plate 17 will be pressed leftward by the engagement protrusion 11a of the lock switch 8a in the same way as described above, thereby changing the locked state of the lock switch 8b. The lock switch 8a is instead locked by the protrusion 18a.

In this way, the lock switches 8a to 8e are configured so that the locked state is released when any one of the other lock switches is pressed, and also when the non-lock release switch 9 is restored, as will be described later. It is designed so that

That is, when the non-lock release switch 9 is pressed while the lock switch 8b is locked by the interlocking plate 17, the crank piece 22 rotates downward as shown in FIG. The hole portion 21 extends in the horizontal direction of the window hole 21 while being pressed against the lower edge a of the pin contact portion 20 by a force of 24.
Move to a.

When the non-lock release switch 9 is further pressed, the pin 23 returns to its original position along the lower edge a, and when the non-lock release switch 9 reaches the operation stop position, it passes through the pin contact portion 20 and enters the window hole 21. hole 2 extending in the vertical direction of
1 Contact the side wall of b.

FIG. 3C shows this situation. Next, when the external force applied to the non-lock release switch 9 is gradually removed, the non-lock release switch 9 begins to rise due to the force of the spring 12 mounted inside, so the pin 23 As shown in FIG. 2 , as the crank piece 22 rotates counterclockwise, it moves to the left and comes into contact with the side edge C of the pin contact portion 20 of the window hole 21 .

Further, when the crank piece 22 is rotated upward as shown in FIG. .

In this case, L is the distance from the rotation center O of the crank piece 22 to the pin abutment part 20 of the window hole 21, and P is the distance from the rotation center O of the crank piece 22 to the farthest part of the pin 23 (the left circumferential surface in the figure). is the distance.

Thus, when the interlocking plate 17 is pressed leftward by the pin 23 and moves, the engagement protrusion 11 of the lock switch 8b
b is disengaged from the protrusion 18b of the interlocking plate 17, and the lock switch 8b is restored.

When the non-lock release switch 9 is completely restored to its original position, the interlocking plate 17 is moved to the right by the force of the spring 19, and the pin 23 is pressed against the pin abutting portion 20 of the window hole 21 by the force of the crank spring 24. and complete the operation.

As explained above, according to the non-lock release mechanism of the interlocking switch according to the present invention, the interlocking plate that locks the lock switch is provided with a bent window hole having a pin abutting part,
A crank piece having a pin that engages in this window hole is rotatably attached to the non-lock release switch, and the crank piece is constantly biased in the direction in which the pin abuts on the pin abutting portion. The locking state of the lock switch can be released by operating the interlocking plate during the recovery operation of the lock release switch.

Moreover, since the interlocking plate is operated as the restoring force of the non-lock release switch moves from a strong position to a weak position, the restoring force is not wasted and the operation can be performed with light operating force.

As a result, operability is improved, and since the crank piece rotates, there is less friction, making the operation of the non-lock release switch stable and reliable, improving reliability, and the practical effects are extremely large.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of an interlock switch equipped with a non-lock release mechanism according to the present invention, Fig. 2 is a longitudinal sectional view thereof, and Figs. 3 a-e are views of the non-lock release mechanism of the present invention. It is an operation explanatory diagram. 1... Interlocking switch, 8a-8e...
Lock switch, 9...Non-lock release switch, 11a. 11 b... Engaging protrusion, 17... Interlocking plate, 18 a, 18 b... Protrusion, 20...
...Pin contact part, 21...Window hole, 22...
... Crank piece, 23 ... Pin, 24
...Crank spring.

Claims (1)

[Scope of utility model registration request] In a non-lock release mechanism of an interlocking switch in which a pressed lock switch is locked by an interlocking plate and a non-lock release switch releases the locked state of the lock switch, the interlocking plate is provided with a window hole having a pin contact portion. , a crank piece having a pin that engages in the window hole and that is always biased in a direction in which the pin comes into contact with a pin abutting portion of the window hole is rotatably attached to the non-lock release switch. , the pin moves within the window hole as the crank piece rotates during the pressing operation of the lock switch and the non-lock release switch and does not act on the interlocking plate, and presses the inner wall of the window hole during the recovery operation. A non-lock release mechanism for an interlocking switch, characterized in that the locking state of the lock switch is released by moving the interlocking plate.