JPH0313877Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field The present invention relates to a cueing mechanism for a tape player. In particular, when setting a tape player to the cueing state, an eject operation is required to move the head and pinch roller. This relates to a mechanism controlled by a lock plate that rotates as a member moves.

(b) Description of the Prior Art In order to locate the beginning of a song recorded on a tape in a tape player, the tape is set to fast forward or rewind and run at high speed, and the head is lightly touched on the surface of the tape. By making contact with it, it is possible to detect silent parts or cue signals between songs recorded on the tape. In this case, it is necessary to move the pinch roller back to a position away from the capstan shaft and tape.
The head also needs to be moved back slightly from the normal playback position so that it makes light contact with the tape. On the other hand, in such a cueing state, after the beginning of the song is detected, the pinch roller is advanced and pressed against the capstan shaft, causing the tape to run at the normal speed, and the head It is necessary to move it slightly forward to the side and make it come into contact with the tape more strongly than in the cue position. Furthermore, when the tape player is stopped and the cassette pack is ejected for replacement from within the tape player, it is necessary to completely separate the pinch roller and head from the tape so that the cassette pack is not ejected.

In this way, in a tape player, the pinch roller is moved to two stages: the normal recording/playback state and the cue or eject state, and the head is moved to three stages: the recording/playback state, the cue state, and the eject state. was. In general, such movement of the pinch roller and the head is achieved by constructing the pinch roller plate for moving the pinch roller and the head plate for supporting the head as separate members, so that the pinch roller and the head can be moved in the recording and playback state. To do this, the pinch roller plate and head plate, which had been retracted to the eject position, are interlocked and moved simultaneously to the recording and playback state.

To achieve the cueing state, the pinch roller plate is retracted to the eject position, and the head plate is only slightly retracted to the cueing position by some means.

To enter the eject state, the head plate in the cue position is moved back to the eject position, and is placed in the same position as the pinch roller plate, which is already in the eject position.

The following methods have been adopted.

By the way, in order to achieve the cueing state, it is essential to have a means for locking only the head plate at a position slightly retracted from the recording/playback position. Various means for this purpose have been proposed in the past, one of which is shown in FIGS. 1a to 1d.

This conventional type was proposed by the applicant and takes advantage of the fact that the position of the eject operating member for taking out the cassette pack from inside the tape player is different between the cue state and the eject state. That is, FIG. 1a shows the recording and playback state of the tape player, and the tape player has the following:
An eject operating member 1 is provided which moves parallel to the tape running direction (left and right in the figure), and this eject operating member 1 is provided with a locking portion 2 for regulating the retracted position of the head plate, which will be described later. The head plate 3 has a head mounted on its upper surface, and is movable at right angles to the running direction of the tape (back and forth in the figure). Therefore, it is always pulled in the backward direction (downward in the figure), but in this recording and playback state, the head is held in the forward position where the tape is securely in contact with the tape by a locking means (not shown), such as an electromagnetic plunger. . This head plate 3 has a pin 4 facing the locking portion 2 of the eject operation member 1.
is provided, but in the recording and playback state,
Since the head plate 3 is locked in the forward position by an electromagnetic plunger or the like, this pin 4 is also separated from the locking portion 2. Further, a pinch roller plate 5 is arranged below the head plate 3 so as to move back and forth independently of the head plate 3, but this pinch roller plate 5 is also in the forward position in the recording and playback state. .

Next, in the cueing state, as shown in FIG. In this case, as shown in Fig. 1c, by moving the eject operation member 1 to the eject side (to the right in the figure), the engagement between the locking part 2 and the pin 4 of the head plate 3 is released, and the head plate is removed. 3 to the same ejected state as the pinch roller plate 5.

By the way, when loading a cassette pack into a tape player and setting the tape player to the recording/playback state, the eject operation member 1 first moves to the recording/playback state as shown in FIG. It is preferable that the head plate 3 and the pinch roller plate 5 move forward with a time lag corresponding to the time when the pack is completely loaded, resulting in the recording/playback state as shown in FIG. 1a. If the eject operating member 1 is moved to the recording/playback state and the head plate 3 and pinch roller plate 5 are moved to the record/playback state at the same time, the head or pinch roller will be removed before the cassette pack is completely loaded. This is because there is a risk that the motor will move forward and a failure will occur. Therefore, when the head plate 3 and the pinch roller plate 5 move forward, the pin 4 of the head plate 3 is moved by slightly moving the eject operation member 1, which has already moved to the recording/playback side as shown in FIG. 1d, to the eject side.
The recording and reproducing state as shown in FIG. 1A is made so that the recording and reproducing state is obtained by overcoming the locking portion 2 of the eject operation member 1.

However, the eject operation member 1 is pulled to the left in the figure by the spring 6 and held at the recording/playback position, and as the head plate 3 moves forward, the eject operation member 1 is moved slightly to the eject side (to the right) by the pin 4 of the head plate 3. Even if it is moved, the force of the spring 6 will return it to its original recording and playback state. For that reason,
In order to advance the head plate 3 and the pinch roller plate 5, a large driving force is required to overcome the force of the spring 6. Since this driving force normally uses the suction force of an electromagnetic plunger, an extremely large plunger must be used to advance the head plate, making it difficult to downsize the tape player. There was a drawback.

(c) Purpose This invention was proposed to solve the above-mentioned drawbacks of the conventional type, and its purpose is to provide a rotatable lock plate near the head plate.
This lock plate is provided with an engaging portion that engages with a pin on the head plate side, and this lock plate is rotated as the eject operating member moves, and the eject operating member does not move when the head plate moves forward. By rotating only the lock plate, there is no need to move the eject operation member when the head plate advances, and the head plate can be moved forward with extremely light force. The goal is to provide a mechanism.

(d) Configuration Next, the present invention will be specifically explained based on the embodiments shown in FIGS. 2a to 2d.

In FIG. 2, a head 12 is fixed on a head plate 11, and this head plate 11 is always urged backward by the action of a spring 13. A forward electromagnetic plunger (not shown) is connected to the head plate 11, and the electromagnetic plunger allows the head plate 11 to move forward against the force of the spring 13. This head plate 11 is provided with a positioning member 14 such as a pin or roller.

A lock plate 15 is provided on the side of the head plate 11. This lock plate 15
For example, it is rotatably attached to a support shaft 16 fixed to the chassis, and has two locking positions at the front as shown in Fig. 2a and b, and a locking position in the front as shown in Fig. 2c. It is movable between a rear unlocked position and a spring 17 provided between it and the chassis and is biased toward the front lock position in the figure. The front edge of the lock plate 15 serves as an engaging portion 18 for engaging the positioning member 14, and the side edge of the lock plate 15 on the head plate 11 side is provided with a lock plate 11.
A recess 19 is formed into which the positioning member 14 enters when retracting. Furthermore, an engagement pawl 20 with an eject operation member is integrally provided on the rear edge of the lock plate 15.

The eject operation member 21 is the head plate 11
A plate-shaped member extending perpendicularly to the direction of movement of the
When ejecting the cassette pack, the second
As shown in Figure c, it moves to the eject position on the right side of the figure, and when the loading of the cassette pack is completed, it moves to the recording and playback position on the left side of the figure, as shown in Figure 2 a and b. It's summery. The engaging pawl 20 of the lock plate 15 is slidably engaged with the side edge of the eject operation member 21.
A cam portion 22 for regulating the rotational position of the lock plate 15 is provided at the engagement portion with the engagement pawl 20. This cam portion 22 engages with the engaging claw 20 when the eject operation member 21 is at the recording/playback position, supports the lock plate 15 at the lock position, and causes the lock plate 15 to lock the positioning member 14. a locking portion 22a for unlocking the positioning member 14; and a releasing portion 22 that engages with the engaging claw 20 when the eject operation member 21 moves to the eject side and moves the lock plate 15 to the lock release side to release the lock of the positioning member 14.
b. A tapered portion 22c connecting the locking portion 22a and the release portion 22b.

(e) Operation The cueing mechanism of the present invention has the above-mentioned configuration, and its operation will be explained next.

Recording/playback state In the tape player's recording/playback state, the second
As shown in FIG. 1A, the head plate 11 is pulled forward by its forward plunger and moves forward together with a pinch roller plate (not shown), so that the head plate 11 is in a position where it can securely come into contact with the running tape. In this case, since the cassette pack is completely loaded in the tape player, the eject operation member 21
It moves to the left side in the figure and is in recording and playback mode. Further, the lock plate 15 is urged to the forward lock position by a spring 17, and its engagement pawl 20 engages the lock portion 2 of the eject operation member 21.
2a.

Cueing state When the tape player is switched to the cueing state, the attraction force of the electromagnetic plunger that pulls the head plate is released, and the head plate 11 and pinch roller plate (not shown), which are interlocked with this electromagnetic plunger, are moved by the spring. retreat by force.
In this case, the pinch roller plate is completely retracted to the same position as in the ejected state, similar to the conventional type. However, since the positioning member 14 provided on the head plate 11 engages with the locking portion 18 of the lock plate 15 in the locked position, the head plate 11 is not moved back any further as shown in FIG.
2 and the tape move back to a position where they lightly contact each other and then stop. Therefore, if the tape runs at high speed at this position, the head 12 can detect a cue signal on the tape or a silent part between songs, and cue the beginning of the song.

Eject state When the tape player is switched to the eject state in order to replace the cassette pack, the eject operating member 21 moves to the right in the figure, and the eject operation member 21 moves to the right in the figure.
The eject position is reached as shown in the figure. Then, the lock plate 15 is pressed by the cam portion 22 of the eject operation member 21 and rotates to the unlocked position at the rear in the figure. That is, the engaging claw 20 of the lock plate 15 moves from the lock portion 22a through the tapered portion 22c toward the releasing portion 22b as the eject operation member 21 moves, and accordingly, the lock plate 1
5 rotates rearward against the force of spring 17 to the unlocked position. As a result, the locking portion 18 of the lock plate 15 and the positioning member 14 are disengaged, and the head plate 11 is disengaged from the lock plate 15.
It is possible to retreat to the same eject position as the pinch roller plate 5 by being pulled by the retreating spring 13 without being thrown away.

Transition to Recording/Playback State When the cassette pack is loaded into the tape player from the eject state as described above, the eject operating member 21 moves to the left in the figure and enters the recording/playback state. As the eject operation member 21 moves, the lock plate 15 engaged with the cam portion 22 is also pulled by the spring 17 and rotated to the forward lock position, resulting in the state shown in FIG. 2d. . However, immediately after the eject operation member 21 reaches the recording and playback state, the head plate 11 has not moved forward yet, so the positioning member 14 enters the recess 19 of the lock plate 15. . In this state, when the head plate 11 and the pinch roller plate are pulled by the forward electromagnetic plunger, the positioning member 14 of the head plate 11 presses the lock plate 15 from the back side of the locking part 18, and the spring The lock plate 15 is rotated against the force 17 to the unlocked position at the rear in the figure. Then,
This positioning member 14 can move over the edge of the recess 19 to the front of the locking part 18, and if the lock plate 15 is then returned to the front lock position by the force of the spring 17, as shown in FIG. a
The head plate 11 reaches the recording/playback state as shown in FIG.

(f) Effect As shown in the above embodiments, the cueing mechanism of the present invention rotates the lock plate 15 as the eject operation member 21 moves, and moves only the lock plate 15 as the head plate 11 moves forward. It is designed to rotate. That is,
When transitioning from the eject state to the recording/playback state, simply rotate the lock plate 15 against its spring 17 without moving the eject operating member 21 once it has reached the recording/playback position. The head plate 11 can be moved forward to the recording/playback state.

Therefore, according to the present invention, it is no longer necessary to move the head plate 11 against the force of the strong spring that holds the eject operating member 21 in the recording/playback state, and it is no longer necessary to move the head plate 11 against the force of the strong spring that holds the eject operating member 21 in the recording/playback state. Reverse head plate 1
Since it is only necessary to advance the head plate 11, the traction force required when the head plate 11 moves forward is extremely small. Particularly, unlike the eject operating member 21 for holding the cassette pack in the loaded state, the lock plate 15 does not need to prevent its movement with a great force, so the spring 17 provided on the lock plate 15 does not need to prevent the eject operating member 21 from moving. Since the force of the spring is much weaker than that of a conventional spring, the impact on the forward traction force of the head plate 11 is extremely small. Therefore, the traction means for advancing the head plate, such as an electromagnetic plunger, can be extremely small, making it possible to downsize the entire tape player.

[Brief explanation of the drawing]

FIGS. 1a to 1d are plan views of a conventional cueing mechanism;
2A to 2D are plan views showing an example of the cueing mechanism of the present invention, in which a is a recording/playback state, b is a cueing state, c is an eject state, and d is a transition from an eject state to a cueing state. This shows the transition of 1... Eject operation member, 2... Locking part, 3
... Head plate, 4 ... Pin, 5 ... Pinch roller plate, 6 ... Spring, 11 ... Head plate, 12 ... Head, 13 ... Backward spring, 14 ... Positioning member, 15 ... Lock Plate, 16... Support shaft, 17... Spring, 18... Locking part, 19... Recessed part, 20... Engaging claw, 21... Eject operation member, 22... Cam part, 22a... Lock part , 22b... Liberation Department,
22c...Tapered part.

Claims (1)

[Scope of Claim for Utility Model Registration] An eject operating member that moves between a recording playback position and an eject position as a cassette pack is inserted into and removed from a tape player, and a cueing position provided between the recording playback position and the eject position, as well as the eject position. It is disposed so as to move back and forth between the two, and is always biased to retreat toward the eject position, and during recording and playback, is held at the recording and playback position in which it moves forward against the biasing force in the backward direction. The head plate is rotatable between a lock position for locking the head plate in its cue position and a lock release position that does not prevent the head plate from moving back and forth, and the eject operation member is The lock plate is provided with a lock plate that rotates to the unlocked position as the head plate moves to the lock position, and a spring that biases the lock plate toward the lock position, and the lock plate is engaged with a positioning member provided on the head plate. A locking portion for locking the head plate in the cue position and a recess into which the positioning member is inserted when the head plate is retreated to the eject position, and the lock plate is configured to lock the eject operation member in the recording and playback position. A tape player characterized in that, in some cases, the head plate is separated from the eject operation member by the positioning member inserted into the recess, and is pressed and rotated to the unlocked position as the head plate moves forward. cueing mechanism.