JPS6217945Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lock type multiple push button switch device in which when a master lock switch is turned on and the master lock switch is locked, the slave lock switch is continuously released from lock and cannot be locked.

For example, in video tape recorders, etc.
There are times when you want to press the playback switch to playback continuously, and while viewing images on a CRT, you may want to advance one frame at a time. In that case, press the frame feed switch to switch to frame feed, but there are two cases: when you want to switch to frame feed continuously and when you want to switch to frame feed temporarily only while you press it with your finger. There is. In order to satisfy such requirements, switching has conventionally been performed using electronic circuits. However, switching by electronic circuitry has the disadvantage of high cost.

If a conventionally known lock type multiple push button switch device could satisfy these two requirements, it would be possible to reduce costs, but in conventional devices of this type, a lock switch is pressed to lock it in the on state, and the When you press the lock switch, the newly pressed lock switch will be locked in the on state, and the previous lock switch will not be able to maintain the on state and will turn off. However, there was a drawback in that it was not possible to switch to frame-by-frame forwarding, and the two requirements mentioned above could not be satisfied.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lock type multiple push button switch device in which when a master lock switch is turned on and the master lock switch is locked, the slave lock switch is continuously released from lock and cannot be locked.

Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 3, the lock type multiple push button switch device of this embodiment includes a main lock switch 1 and a slave lock switch 2, which are connected by a connection frame 3. The main lock switch 1 includes a cylindrical case 4, into which an operating shaft 5 is slidably inserted, and a plurality of fixed contact terminals 6 are arranged in the cylindrical case 4 at predetermined intervals in the sliding direction of the operating shaft 5. Fixed through. A switching contact 7 is supported on the operating shaft 5 and is moved as the operating shaft 5 moves to switch and connect the fixed contact terminal 6. A return spring 8 is fitted to the tip of the operating shaft 5, one end of which is supported by the operating shaft 5 via a spring receiver 9, and the other end supported by the connection frame 3. A heart cam type locking mechanism 10 is provided at a position corresponding to the connecting frame 3. This mechanism 10 includes a heart cam groove 11 formed on the surface of the operating shaft 5, a lock pin 12 that is engaged with the heart cam groove 11 to lock the operating shaft 5, a lid 13, and a lock pin 12 that is connected to the heart cam groove 11. The lock pin 12 rotates relatively within the heart cam groove 11 when the operating shaft 5 is pushed, and lock pins 12 provided at two locations within the heart cam groove 11 rotate. A locking pin 12 is engaged with the stepped portion to perform a locking operation. That is, 1
When pressed once, the operating shaft 5 is locked in the pushed-in state, and when pressed the next time, the operating shaft 5 is returned to the front and locked. The lid 13 and the case 4 are pressed and fixed by the claws 3a of the connection frame 3. The connecting frame 3 has a U-shaped cross section, and the interlocking plate 15 is slidably accommodated therein. In order to operate the interlocking plate 15, the operating shaft 5 is provided with an interlocking plate operation section 16 consisting of a recess 16a and an inclined surface 16b. The operated part 15A of the interlocking plate 15 is inserted through the interlocking plate operating part 1 of the operating shaft 5.
6 is engaged. Operated portion 15 of interlocking plate 16
An interlocking plate biasing spring 18 made of a plate spring is supported by the pawl 3a of the connecting frame 3 so that A always contacts the interlocking plate operating portion 16 of the operating shaft 5.

Similar to the main lock switch 1, the slave lock switch 2 has an operating shaft 20 slidably inserted into a cylindrical case 19, and a plurality of fixed terminals (not shown) are inserted into the cylindrical case 19 to allow the operating shaft 20 to slide. A switching contact (not shown) is supported on the operating shaft 20, and is moved as the operating shaft 20 moves to perform a switching connection between the fixed contact terminals. . A self-returning spring (not shown) is fitted to the tip of the operating shaft 20, one end of which is supported by the operating shaft 20 via a spring receiver (not shown), and the other end supported by the connection frame 3. ing. A heart cam type locking mechanism 21 is provided at a position corresponding to the connecting frame 3. This mechanism 21 includes a heart cam groove 22 formed on the surface of the operating shaft 20, and a lock pin 23 that engages with the heart cam groove 22 and locks the operating shaft 20.
, the lid 24 and the lock pin 23 are in the heart cam groove 2.
Spring 25 that biases the spring 25 so that it does not fall out of the spring 2.
The lock pin 23 is slidably projected outside the lid 24.

A lock release arm 26 is provided for unlocking the heart cam type lock mechanism 21. This lock release arm 26 has an inverted L shape, and one end thereof is rotatably supported by a pin 27 on the connection frame 3 between the lock switches 1 and 2. A slit 26A is formed at the other end of the lock release arm 26, and the neck 23A of the lock pin 23 is inserted into this slit, and the head 23 is inserted into the slit 26A.
3B acts to prevent it from coming off when it is pulled up.

An operating section 15B is formed on the interlocking plate 15 in an upright manner, and this operating section 15B is connected to the lock release arm 2.
It passes through the slit 26B on the lower side of the lock switch 6 and comes into contact with the lock release arm 26 from the slave lock switch 2 side. The first spring receiving portion 15 of the interlocking plate 15 is located between the main lock switch 1 and the lock release arm 26.
C is provided, and the operating portion 15B of the interlocking plate 15 is provided with a second spring receiving portion 15D. A return spring 28 for self-returning the lock release arm 26 is supported between these spring receivers 15C and 15D.

Such a lock type multiple push button switch device is
When the operating shaft 5 of the main lock switch 1 is pressed, the fixed contact terminal 6 is switched and connected, and the operating shaft 5 is locked by the lock mechanism 10 in the pushed state. When the operation shaft 5 is pushed in, the interlocking plate 15 is pushed downward in FIG. 3 and to the left in FIG.
The lock release arm 26 is rotated counterclockwise around the pin 27 in FIG. When lifted, the lock pin 23 is separated from the heart cam groove 22, so that the slave lock switch 2 is continuously unlocked so that it cannot be locked. In this state, even if the operating shaft 20 of the slave lock switch 2 is pressed, it will not be locked, and the fixed contact terminal will continue to be switched and connected only as long as it is pressed. That is, if the main lock switch 1 is used as a playback switch and the slave lock switch 2 is used as a frame advance switch, when the playback switch 1 is turned on, the lock on the frame advance switch 2 is continuously released, and when the frame advance switch 2 is turned on in the playback state. If you press the button, you can advance the frame by frame only while the button is pressed, and when you stop pressing it, the operating shaft 20 will return to its original position, stop the frame advance, and restart continuous playback. .

If you want to advance frames continuously, press the operating shaft 5 of the playback switch (main lock switch) 1 and return the operating shaft 5 to its original position. Then, the interlocking plate 15
The operated part 15A is pushed by the spring 18 and enters the recess 16a of the interlocking plate operation part 16, and the interlocking plate 15 moves into the third
The operating portion 15B of the interlocking plate 15 no longer pushes the lock release arm 26 in the counterclockwise direction as shown in FIG. 1, the lock pin 23 of the frame advance switch (slave lock switch) 2 is no longer pulled up, and the lock pin 23 is engaged with the heart cam groove 22 by the pressing force of the spring 25, returning to the lockable state.
When the operating shaft 20 of the frame advance switch 2 is pressed in this state, the fixed contact terminals are switched and connected, and in this state the operating shaft 20 is locked by the lock pin 23.

This lock type multiple push button switch device is
In addition to video tape recorders, it can also be used as a fast forward switch and pause switch for audio tape decks, etc.

Further, instead of one slave lock switch, a plurality of slave lock switches can be provided.

As explained above, in the lock type multiple push button switch device according to the present invention, the lock release arm is linked to the interlocking plate, and when the main lock switch is locked, the lock pin of the slave lock switch is removed from the heart cam groove to prevent the slave lock switch from being locked. As a result, the intended purpose can be achieved using a mechanical method, and costs can be reduced.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the lock type multiple push button switch device according to the present invention. Figure 1 is a cross-sectional view of the connecting frame, and Figure 2 is a cross-sectional view from the main lock switch side. The side view shown in FIG. 3 is a vertical sectional view of the main lock switch. 1...Main lock switch, 2...Slave lock switch, 3...Connection frame, 5...Operation shaft, 8...
... Return spring, 10 ... Heart cam type lock mechanism, 11 ... Heart cam groove, 12 ... Lock pin, 15 ... Interlocking plate, 16 ... Interlocking plate operating section, 2
0... Operating shaft, 21... Heart cam type lock mechanism, 22... Heart cam groove, 23... Lock pin, 26... Lock release arm, 27... Pin.

Claims (1)

[Scope of utility model registration request] A main lock switch having a heart cam type locking mechanism and a slave lock switch having a heart cam type locking mechanism are arranged side by side and connected to each other by a connecting frame, and within this connecting frame, the main lock switch has a lock switch that can be rotated left and right by the forward and backward movement of the operating shaft of the main lock switch. An interlocking plate that moves back and forth is built in, and the connection frame has a lock release arm that is rotated via the interlocking plate by the forward movement of the operating shaft to release the lock pin in the heart cam type lock mechanism of the slave lock switch from the heart cam groove. A rotatably supported lock type multiple push button switch device.