JPH06180910A - Cassette type tape player - Google Patents

Abstract

PURPOSE:To enhance safety by preventing an erroneous operation due to a mischief. CONSTITUTION:A head plate 3 is always elastically energized from a non-play position to a play position. In the step of moving down a cassette holder from the non-play position to the play position, an eject lever 18 is retracted to a position capable of ejecting. The cassette tape player comprises a holding lever 14 for restricting the pate 3 toward the play position in a normal state and operating it against a spring 9 at the time of retracting the lever 18 to release the restricting state, and a sensing lever 5 for restricting the plate 3 in movement toward the play position in a normal state and operating against the spring 9 by a cassette inserted to the holder when the holder is moved down to release the restricting state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette type tape player which is particularly effective for mounting on a vehicle.

[0002]

2. Description of the Related Art Conventionally, the cassette is located on the insertion opening side,
The head plate is held in the non-play position against its biasing spring, and when the cassette is inserted and the cassette holder is lowered to the play position, the head plate acts on the cassette to detect the lowered state, and the holding state is maintained. A cassette type tape player having a detecting means for unwinding is known.

[0003]

However, according to the above-mentioned conventional tape player, the detecting means is located at the insertion opening side of the cassette so as to correspond to the latest position of the cassette holder in the descending process. Due to the established relationship,
For example, if a child mischief such as putting a finger or a foreign object into the cassette insertion slot, or if the cassette is tilted extremely downward and always inserted incorrectly, the detection means operates even if the cassette is not inserted. The head plate may move to the play position.In this state, when inserting the cassette into the cassette holder, the cassette holder descends on the head plate which has moved to the play position, and the tape play is performed. Not only disable
It has the drawback of mechanically damaging the cassette or play mechanism.

[0004]

Therefore, according to the present application, in the present application, the head plate is horizontally movable and is always elastically biased from the non-play position toward the play position, and the cassette holder is moved downward from the non-play position to the play position. In a cassette-type tape player that is movable and the eject lever retracts to a position where it can be ejected at the play position, it restrains the horizontal movement of the head plate in the play position direction, and the eject lever retracts. Occasionally working with this, holding means for releasing the restraint and allowing movement in the play position direction, and in a normal state, held in a position for restraining horizontal movement of the head plate in the play position direction,
In addition, when the cassette holder is moved downward, it is provided with a detection means that acts on the cassette to operate at a position that allows the head plate to move in the play position direction.

[0005]

When the cassette is inserted into the cassette holder and the cassette moves downward to the play position, the downward movement causes the eject lever to retreat to a state in which it can be ejected, whereby the holding means operates. The holding state is released, and the head plate moves to the play position by the elastic force. On the other hand, when the cassette holder moves downward, the detection lever is pressed downward by the cassette and rotates downward against the spring, and when the cassette holder moves down sufficiently to the play position, the cassette activates the detection means. Then, the restraint of the head plate is released, and the head plate is
Move to play position.

These movements are performed one after another, and the movement of the play position of the head plate is double checked.
Further, even if the detecting means is actuated by a mischief in a non-playing state and the restraint of the head plate is released and the head plate tries to move in the play position direction, the movement is restrained by the holding means and there is no fear of malfunction.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. The drawings show the main part of the present application, and the substrate 1
A head plate 3 which is composed of a plate having an L-shape in a plane and has a magnetic head 2 is attached to a vertical piece of the plate so as to be horizontally movable in the horizontal direction in the figure by a known means. Is always biased to the left (playing direction) by the spring 4. The substrate 1 is located on the insertion port side (front side) of the cassette P,
A base portion of the detection lever 5 extending in the left-right direction is pivotally attached by a pivot shaft 6 so as to be vertically rotatable, and a sleeve piece 8 having a notched step portion 7 at its upper edge is integrally provided on the base portion. The detection lever 5 is constantly urged to rotate upward by the spring 9, and the notch step portion 7 abuts on the lower surface of the head plate 3 and the head plate 3 is urged by the rotation force.
The detection lever 5 is held in the upward state by being locked with the edge of the detection lever 5.

On the lower surface of the base plate 1 corresponding to the detection lever 5, an intermediate portion is pivotally mounted by a pivot shaft 10 so as to be horizontally rotatable, and one side (left side end portion) of the action piece 11 and the other side thereof. Holding levers 14 are provided, each of which extends a holding piece 13 having a locking step portion 12 at its tip.
Is urged to rotate in one direction (clockwise) by the spring 9 provided between it and the detection lever 5, and is normally provided on the head plate 1 at the locking step portion 12. The locking piece 16 is locked and its rotation is restrained, and the head plate 1 is held in the non-play position against the spring 4.

Further, one side edge (left side edge) of the substrate 1 is
It has a standing side plate 17, and an eject lever 18 is supported on the side plate 17 so as to be movable back and forth, and is elastically pressed by a spring 19 in a direction in which the eject operation is possible (front direction). Although not shown, the eject lever 18 is provided by well-known means when the cassette holder is moved from the non-play position to the play position.
When the locked state is released, the robot retracts to a position where it can be ejected. The eject lever 18 comes into contact with the action piece 11 of the holding lever 14 in the process of retreating to a position where the eject lever can be operated, and the holding lever 14 is
A rotation force is applied against the spring 9 in a direction to release the engagement with the engagement piece 16, and at the time of an eject operation, the rotation force acts on the trochanter 20 provided on the head plate 1 to cause the head plate 3 to move. There is provided a cam piece 21 for pressing in the direction of the non-playing position. In the figure, 22 is a reel shaft, 23 is a capstan shaft, 24 is a horizontally long hole, and 25 is a drive motor.

When the cassette P is inserted from the non-play position shown in FIGS. 1 and 2, the cassette holder descends as well known (not shown) when the cassette P is fully inserted. The lock state of the eject lever 18 is released, and the eject lever 18 is moved backward by the spring 19. Then, the action piece 11 is moved by the cam piece 21.
Is pressed, the holding lever 14 rotates counterclockwise in the figure against the spring 9, so that the locking means 12 and the locking piece 16 are disengaged, and the head plate 3 moves to the spring. By 4, the player moves in the play direction (to the left).

On the other hand, when the cassette holder descends from the non-playing state, the upwardly inclined detection lever 5 is pressed by the cassette and rotates clockwise in FIG. 2, but in this case, the cassette is sufficiently full. Until it falls to the play position, the side edge of the head plate 3 is in contact with the notch step portion 7 of the detection lever 5, and the movement in the play direction is restricted. Thus, as shown in FIGS.
When the cassette is properly set in the play state, the detection lever 5 becomes horizontal, and the head plate 3 moves to the play position without any restraint. When the eject lever 18 is pressed against the spring 19 from this state, the arc surface of the cam piece 21 contacts the trochanter 20 and the head plate 3 is pushed in the non-play direction (right direction).

[0012]

As described above, according to the present application, the movement of the head plate in the play direction is doubled by the detection lever operated by the cassette as the cassette holder descends and the holding lever operated by the movement of the eject lever. Even if the detection lever is mistakenly operated due to mischief, the movement of the head plate in the play direction is restricted by the holding lever, and the cassette is not inserted in the non-play state. Therefore, even if the cassette holder moves to the play position due to strong external vibration and the holding lever is inadvertently actuated by retracting the eject lever, the cassette does not exist in the cassette holder and the detection lever does not operate. The movement of the head plate to the play position is restrained, providing a highly safe product. It has the advantage of that.

[0013]

[Brief description of drawings]

FIG. 1 is a plan view showing a main part in a non-playing state.

[Figure 2] Front view

FIG. 3 is a plan view of a main part with a part of the operating state cut away.

FIG. 4 is a plan view of a main part with a part of the playing state cut away.

[Figure 5] Front view

[Explanation of symbols]

 1 Substrate 2 Magnetic Head 3 Head Plate 4 Spring 5 Detection Lever 7 Cutout Step 8 Sleeve Piece 9 Spring 11 Working Piece 12 Locking Step 14 Holding Lever 18 Eject Lever 21 Cam Piece

Claims (4)

[Claims] 1. A head plate is horizontally movable, is always elastically biased from a non-play position toward a play position, and a cassette holder is movable downward from the non-play position to the play position. In a cassette type tape player having a structure in which the eject lever retracts to a position where it can be ejected at the play position, it normally restrains the horizontal movement of the head plate in the play position direction and acts when the eject lever retracts. And holding means for releasing the restraint to allow movement in the play position direction, and normally restraining horizontal movement of the head plate in the play position direction, and when the cassette holder moves downward, And a detection means that acts on a position that allows the head plate to move in the play position direction. Type tape player. 2. The holding means is pivotally attached to the base plate such that the middle thereof can be horizontally rotated, and one side has an action piece that acts on a cam piece provided on the eject lever and the other side has an action piece. ,
A holding lever having a locking step portion for locking the locking piece provided on the head plate, and an elastic state of the locking piece and the locking step portion when the head plate is restored to the non-play position. 2. The cassette type tape player according to claim 1, further comprising a spring that holds the tape. 3. The detecting means has a base portion pivotally attached to the substrate so as to be vertically rotatable so as to extend to an upper surface of the substrate, and the detecting means has a base portion.
A detection lever provided with a sleeve having a notched step portion that engages with the edge of the head plate, and when the head plate returns to the non-play position, the engagement state between the notched step portion and the edge of the head plate is suppressed. 3. The cassette type tape player according to claim 1, further comprising a spring for holding the tape. 4. The cassette type tape player according to claim 3, wherein the spring in the holding means and the spring in the detection means are shared.