JPS6232Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an interlocking mechanism between the advancing and retracting movement of the cassette holder and the opening/closing movement of the switch.
The purpose of this is to lock the switch actuator, which opens and closes a switch for preventing cassette recording errors and for automatic detection of chrome tape, in a non-operating position relative to the switch when the cassette holder is in the return position. However, it is an object of the present invention to provide an interlocking mechanism for the cassette holder and the switch actuator, which locks the cassette holder in the performance position, releases the restraint of the switch actuator, and regulates the timing of its operation.

Traditionally, cassette tape recorders often use cassette holders to attach the cassette to the performance position, and electronically controlled cassette tape recorders detect whether recording is possible or not based on the presence or absence of the cassette claw (to prevent erroneous recording). ) and a switch that detects whether or not it is chrome tape based on the presence or absence of a detection hole in the cassette.

An example of how to install such a switch is the first
As shown in the figure, a switch 1 is held by a switch holder 2, and a switch actuator 3 is attached to a shaft 4 provided in the switch holder 2.
The switch is rotatable by the torsion spring 5, and is biased in the switch closing direction (counterclockwise) by the torsion spring 5.

The switch actuator 3 has a protrusion 6 at one end, and when the protrusion 6 enters a detection hole 7a provided at the rear end of the cassette 7 as shown in the figure, the switch actuator 3 closes the switch 1. Electrically detects whether it is recordable or chrome tape.

The switch holder 2 is screwed onto the front side of the mechanism base 8, and at the rear of the mechanism base 8 there is a switch control plate 1 which can be rotated by a shaft 9.
0, and the protruding piece 6 of the switch actuator 3, which is always urged in the direction of the cassette 7 by the torsion spring 5, is retracted when the cassette 7 moves forward and backward.

That is, in order to rotationally displace the switch control plate 10 counterclockwise and press the other end 11 of the switch actuator 3 to restrain the switch actuator 3 in the retracted position rotated clockwise, the switch is rotated. The control plate 10 is locked in the rotated position.

Next, when the cassette 7 is set at the playing position, the switch control plate 10 is rotated back and the switch is activated so that the switch 1 can be closed (if the cassette 7 has the detection hole 7a). It is necessary to release the restraints on Aether 3.

In this series of operations, it is particularly necessary to lock the cassette holder (not shown) in the playing position before locking the switch actuator 3. If this timing is incorrect, for example, if switch actuator 3 is released before the cassette holder is locked, cassette 7 will be released while the cassette holder is moving. It collides with the protrusion 6 of the actuator 3, making it impossible to perform its locking operation, and the protrusion 6 of the switch actuator 3 enters the detection hole 7a of the cassette 7 before the cassette holder is locked. If the cassette holder falls down, the cassette holder will not be able to return even though it is not locked, and there is a risk that the user may misinterpret this as a performance state and attempt recording or playback.

This invention is intended to solve the above-mentioned problems, and one embodiment thereof is shown in FIGS. 2 to 5.

Figure 2 is a side view of the cassette holder in its return position, Figure 3 is its top view, and Figure 4 is a side view of the cassette holder in its playing position. , FIG. 5 shows a top view thereof.

In these figures, 1 is a switch for automatic detection of chrome tape, 1' is a switch for preventing erroneous recording,
Switch actuators 3 and 3' are respectively held by switch holders 2 and 2' and rotatable by shafts 4 and 4', respectively. 5' in the switch closing direction, and the detection hole 7 of the cassette 7 is connected to one end of the switch.
It has projecting pieces 6, 6' that engage with a, 7a', and
The fact that the switch actuators 3, 3' can be restrained at the retracted position by the rotatable switch control plate 10 is similar to that described in the conventional example.

Next, the cassette holder 12 that holds the cassette 7 is held by a guide plate 13 and a link arm 14 that are rotatable on the sides thereof, and the guide plate 13 and the link arm 14 are mutually pivotally supported at the center. Due to the link operation, the cassette holder 12 moves in a manner similar to parallel movement when moving forward and backward.

The guide plate 13 has a locking pin 15 approximately at the center of its free end (upper part of FIG. 2), and a lock lever 16 for locking the locking pin 15 is provided at the upper edge of the mechanism base 8. We are prepared.

The lock lever 16 is rotatably supported by a shaft 17, biased counterclockwise by a spring 18, and has a cam portion 19 at one end thereof.
Moreover, it has an extension arm 20 at the other end.

Next, reference numeral 21 denotes a holding plate of the link mechanism consisting of the guide plate 13 and the link arm 14, which also serves as a mounting member for the mechanism base 8. The holding plate 21 allows the guide plate 13 to rotate, and links the link mechanism. Arm 1
The other end of 4 is held slidably, and the switch control plate 10 is also held rotatably via a shaft 9.

A pin 22 is provided on the side edge of the switch control plate 10, protruding from the retaining plate 21, and a lock arm 24 rotatable by a shaft 23 is provided to lock the pin 22.

This lock arm 24 is biased counterclockwise by a spring 25 and has a hook 26 for locking the pin 22, the upper end of which is engageable with the extension arm 20 of the lock lever 16.

Next, reference numeral 27 denotes a relay lever, which is rotatably supported by a shaft 28, and has a bifurcated portion at one end that engages with a pin 22 of the switch control plate 10, and a pin 29 at the other end.

Reference numeral 30 denotes an eject lever, which can be rotated counterclockwise by pressing an eject button 31, and is biased by a spring 32 in its return direction. A protruding arm 3 is located above the eject lever 30.
3, which is engageable with the pin 29 of the relay lever 27, and whose upper end is connected to the extension arm 20 of the lock lever 16 by a rod 34.

Therefore, the rotation of the eject lever 30 rotationally displaces the lock lever 16, and
The control plate 10 can be rotated via the relay lever 27.

The configuration of the embodiment of this invention is as described above, and includes a ``cassette loading/unloading device'' that advances and retreats the cassette in parallel or similar motion by means of a link operation, and a ``cassette loading/unloading device'' located approximately in the center of the cassette holder. "Cassette holder locking mechanism" provided
has been previously filed, and this invention relates to the interlocking operation with these switch operating mechanisms, and the operation of the embodiment will be explained below.

In the returned state of the cassette holder 12 shown in FIGS.
Since it is in contact with the locking pin 15 of the guide plate 13, it is in a position rotated clockwise.

Therefore, the lock arm 24 is rotated counterclockwise by the spring 25, and its hook portion 26 locks the pin 22 of the switch control plate 10, and the switch control plate 10 is held in the lowered position. has been done. Further, the switch actuator 34 is also in a clockwise rotated position (retracted position), and the protrusion 6 of the switch actuator 3 is away from the path of the cassette, and when the cassette holder is locked, the cassette holder 12 is When pressed in the direction A, the locking pin 15 of the guide plate 13 advances along the cam portion 19 of the lock lever 16 and is finally locked by the notch portion 35 thereof.

In this case, the lock lever 16 is
The lock lever 1 is rotated counterclockwise again by the spring 18 to fall into the notch 35, and the lock lever 1
6, the extension arm 20 rotationally displaces the lock arm 24, and the pin 22 of the switch 10 is unlocked, so that the switch actuator 3 is returned to rotation by the torsion spring 5.

Therefore, the protrusion 6 of the switch actuator 3 enters the detection hole 7a of the cassette 7 (in the case of recordable or chrome tape) and closes the switch 1. In this way, the lock lever 16 has completed locking the cassette holder 12. Specifically, the locking pin 15 of the guide plate 13 has fallen into the notch 35 of the lock lever 16, the lock lever 16 has returned to rotation, and the extension arm 20 locks the lock arm. 24 clockwise to release the lock from the switch control plate 10.

In this way, the switch actuator 3 detects the completion of the locking operation to the cassette holder 12 and is released from the locking operation, so its operation timing remains unchanged.

Next, in the playing state of the cassette holder shown in FIGS. 4 and 5, the protrusion 6 of the switch actuator 3 is in the detection hole 7a of the cassette 7, and if this continues, for example, the cassette holder 12 will be unlocked. However, the cassette 7 cannot be recovered.

Now, if the eject button 31 is pressed when ejecting the cassette holder 12, the eject lever 30 will rotate counterclockwise, and the pin 29 in contact with it will rotate the relay lever 27 clockwise. Then, connect the forked part and pin 2.
2, the switch control plate 10 is rotated counterclockwise.

Furthermore, as the eject lever 30 rotates, the extension arm 20 of the lock lever 16 is released in the direction of arrow B via the rod 34, so the lock arm 24 is rotated counterclockwise by the spring 25 and moved downward. Pin 2 of the switch control board 10 in position
Lock 2.

Further, the lock lever 16 shown in FIG. 5 is also rotated to release the locking of the guide plate 13 from the locking pin 15, and the cassette holder 12 returns to the return position shown in FIG. 3.

In this manner, in the eject operation, the eject button 31 is pressed to move the switch control plate 10 to the lower position, then the lock arm 24 locks it, and then the lock lever 16 locks the cassette holder 12. The operation timing for solving is set in advance.

As explained above, this idea is based on cassette 7.
a cassette holder 12 that can move back and forth between the playing position and the return position while holding the cassette holder; and a switch 1' for preventing erroneous recording or a switch 1 for automatically detecting chrome tape.
and a switch actuator 3, 3' that engages with the detection hole 7a of the cassette to operate the switch.
In the tape recorder, a removable lock lever 16 is disposed above the cassette holder 12 at approximately the center to lock the cassette holder 12 in the playing position, and the lock lever 16 and the switch actuator are connected to each other. Aether 3,3'
a rotatable switch control plate 10 interposed between the switch actuator 3, 3' to restrain the switch actuator 3, 3' in a non-operating position relative to the switch; The cassette tape recorder 12 is provided with a lock arm 24 that is rotatably provided on the side of the cassette holder 12, and when the cassette holder 12 in the return position is moved in the direction of the performance position, the cassette tape recorder 12 is moved approximately in parallel. Together with the above lock lever 1
6 is locked in the playing position, and by displacement of the lock lever 16 based on the completion of the locking operation,
Switch control board 10 by the lock arm 24
The switch actuating mechanism is adapted to work in conjunction with the cassette holder, and the switch actuator 3, 3' is configured to release the lock at the locked position and open/close the switch actuators 3, 3' relative to the switch, thereby preventing erroneous recording. Since the switch or the switch for automatic detection of chrome tape is opened or closed depending on the presence or absence of a detection hole in the cassette, the switch actuator for operating these switches necessarily protrudes into the path of the cassette.

Therefore, when locking or ejecting the cassette holder, the switch actuator is restrained in a position retracted from the cassette, and the restraint is released as necessary. This can be achieved with a simple configuration, allowing the switch actuator to return only after the cassette holder has been securely locked into the playing position, and since the timing relationship remains unchanged, the cassette can be moved forward and backward. There is no possibility that the above-mentioned switch actuator will interfere with the above-mentioned switch actuator.

Moreover, the blocking action of the switch actuator against the cassette causes the cassette holder to be in a false locking state, and there is no fear that the operator will perform recording, playback, etc. in such a state.

[Brief explanation of drawings]

Figure 1 is a side view of the conventional example, Figure 2 is a side view of an embodiment of the actuator of this invention when the cassette holder is in the return position, Figure 3 is its top view, and Figure 4 is the actuator of this invention. FIG. 5 is a side view of one embodiment of the present invention with the cassette holder in the playing position, and FIG. 5 is a top view thereof. 1, 1'...Switch, 2, 2'...Switch holder, 3, 3'...Switch actuator,
5, 5'... actuator spring, 7...
...Cassette, 8...Mechanism base, 10...Switch control board, 12...Cassette holder, 13
...Guide plate, 14...Link arm, 16...
Lock lever, 21... Holding plate, 18... Lock lever spring, 24... Lock arm, 2
5... Lock arm spring, 27... Relay lever, 30... Eject lever, 32... Eject lever spring, 34... Connection rod.

Claims (1)

[Scope of utility model registration request] A cassette holder that holds the cassette and moves back and forth between the playing position and the return position, a switch for preventing erroneous recording or an automatic chrome tape detection switch, and a switch actuator that engages with the detection hole of the cassette to operate the switch. In a tape recorder equipped with a switch actuator, there is provided a removable lock lever disposed approximately in the upper center of the cassette holder for locking the cassette holder in the playing position; a rotatable switch control plate interposed therebetween to restrain the switch actuator in a non-operating position relative to the switch; and a rotatable switch control plate rotatable to the side of the cassette holder to lock the switch control plate in the restrained position. When the cassette holder in the return position is moved in the direction of the playing position, the cassette holder is moved almost in parallel and is locked in the playing position by the lock lever. The switch control plate is disengaged from the locking position of the switch control plate by the lock arm by displacement of the lock lever upon completion of the locking operation, thereby enabling the switch actuator to open and close the switch. Switch operating mechanism that works with the cassette holder.