JPS6037538B2 - cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette tape recorder in which a cassette tape is driven by a solenoid.

This type of cassette tape recorder is equipped with a play solenoid for entering a recording/playback state and a fast forward/rewind solenoid for entering a fast forward/rewind state.

Furthermore, in this type of cassette tape recorder, in order to enter the song selection state, the head must be moved back slightly from the tape when performing the song selection operation, but the head will still be in contact with the tape, while the playback state must be canceled to enter the fast forward/rewind state. be.

However, in the conventional cassette tape recorder of this kind, a solenoid dedicated to music selection is provided to select the music, which requires a dedicated solenoid and a drive device, which has the drawback of being expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive cassette tape recorder that does not require a separate solenoid and is capable of selecting music.

For this reason, the present invention utilizes both the fast forward/rewind solenoid and the play solenoid during the song selection operation, and sets the song selection state by leaving a drive time between the two solenoids.

Embodiments of the present invention will be described below with reference to the drawings.

1 is the chassis; 2a, 2b, 2c are plastic projections molded on the chassis 1; 4 is a head plate that can move left and right on the chassis 1; 4a is a hole that controls the winding roller 50'. The cam portion 5 is a plastic arm rotatably attached to the head plate 4 with a pin 6, and the arm 5 has an elastic claw portion 5a, an arm portion 5b, and a protruding cam portion 5c groove. 5d and a pin portion 5e.

Magnetic heads 7 and 8 are placed on the head plate 4, and due to the movement of the head plate 4, they enter the cassette during recording and reproduction and come into contact with the tape at a proper position.

Reference numeral 9 denotes a capstan, which is fixed integrally with the flywheel 10 and is mounted so that it can rotate freely on a bearing on the chassis 1 by the power of a motor (not shown).

11 is a pinch roller arm; 12 is a pinch roller rotatably attached to the pinch roller arm 11; the pinch roller arm 11 is rotatably attached to a shaft on the chassis; The pinch roller 12 is configured to be pressed against the capstan 9 which is interlocked with the pinch roller 12.

13 is a sub-chassis fixed to the chassis 1, 14 is a play solenoid fixed to the sub-chassis 13, 15 is a plunger, 16 is a pin fixed to the plunger 15,
When the solenoid 14 is connected to the arm 17 and energized, the plunger 15 rotates about the pin 18 on the sub-chassis 13 as a fulcrum.

At the other end of the arm 17 is a spring 72 for returning the head plate.
The pin 19 shown in FIG. Reference numeral 21 is a pin at the fulcrum of the arm 20, which is fixed to the chassis.

A pin 22 is fixed to the other end of the arm 20 and is iron-fitted to a long hole in the head plate 4.

In FIGS. 1 and 2, reference numeral 23 is a plastic protrusion molded on the chassis, which positions the head plate 4 during recording and playback. 24 is a leaf spring that presses the head plate 4 toward the chassis 1, and 25 is a pulley, which is fixed to the upper end of the shaft 26 in FIG. 6.

27 is a booley rotatably attached to the lower end of the shaft 26 via a friction mechanism such as felt, 28 is a swinging arm, 28a is a long notch thereof, 28b is a protrusion, 29
is a friction member such as felt, and is attached to the swing arm 28.

30 is a pulley having an elastic member such as rubber on the outer periphery; 31 is a spring that presses the pulley 30 against the felt 29;
Reference numeral 2 denotes a spring receiver, which is prevented from coming off by a washer 33, and the washer 33 is iron-coupled to the shaft 34.

This shaft 34 is integrally attached to the swing arm 28. 35 is a brake plate, which is slidably attached;
It is biased toward the turnable side by the brake spring 36.

35a is a cam portion of the brake plate 35, and 37 is a pulley holder, which is made up of a bearing portion of the shaft 26, a guide portion of the brake 35, etc.

37a is a guide protrusion of the brake plate 35 (Fig. 2), 37
b is a guide tongue piece (Fig. 6) that regulates the height direction position of the brake plate 35; 38 is a collar for regulating the height of the swing arm 28 and guiding the elongated portion 28a;
It is fixed at 7.

39 is a spring hung between the shaft 34 and the washer 40, and the washer 4 and the pulley holder 37.
It is rotatably attached to the outer collar of the bearing.

37c is a retaining claw of the washer 40, and 41 is an arm, which is rotatably mounted around a fulcrum 42 in FIG.
(FIG. 4), the shaft 34 is moved away from the pulley 25.

In FIG. 4, an arm 44 is rotatably mounted around a fulcrum 45, and a pin 46 (FIGS. 4 and 10) is fixed to one end. This pin 46 is opposite the arm 41. Further, the arm 44 has a long twill 44a at its end. Reference numeral 48 denotes an arm, which is rotatably mounted around a fulcrum 47, and has protrusions 48a and 48b at one end.
The other end has the outermost hole 48c, and the outermost hole 48c has an arm 44.
A pin 46 fixed to is inserted.

49 is the winding arm, which is made of plastic etc.
One end has a protrusion 49a opposite to the protrusion 48b, and the other end has a coaxial winding pulley 50 and a winding roller 50', and the winding pulley 50 is rotated by a friction mechanism such as a known felt. is transmitted to the take-up roller 50'.

51 is a solenoid, which is fixed to the chassis or the like.

52 is a plunger, and 53 is a pin fixed to the plunger 52, which is inserted into the length 44a of the arm 44, and when the plunger 52 is operated, the arm 44 is rotated.

In FIG. 3, 54 is a motor, which is fixed to chassis-related members via a rubber cushion, etc., and 55 is a motor pulley fixed on the rotation shaft of the motor 54;
A belt 6 is hung between the motor pulley 55 and the flywheel 10 and transmits the rotation of the motor 54. A motor 57 is also fixed to a chassis-related member with a rubber cushion or the like, and a motor pulley 58 is fixed to the rotating shaft of the motor 58.

59 is a belt, pulley 27 and motor pulley 58
and transmits the rotation of the motor.

In FIG. 4, a six-way belt is stretched between pulley 27 and take-up pulley 50, and transmits the rotation of pulley 27 to take-up pulley 501. In FIGS. 1 and 5, reference numeral 61 denotes a turntable on the delivery side, a gear is rotatably engaged with the gear, and is pressed by a spring 64 against a friction material 63 such as felt. Reference numeral 65 denotes a clutch, which is mounted so that it can move up and down on a hexagonal column integrated with the turntable 61 on the feedout side, and is biased upward by a spring 64, so that the cap fixed to the turntable 61 on the feedout side can be removed. It is said to be a stop.

66 is a turntable on the winding side, 67 is a spring, 68
is a clutch, which is installed so that it can slide up and down on a hexagonal column that is integrated with the take-up side turntable 66, and which is attached to a spring 67.
A cap fixed to the take-up turntable 66 prevents it from coming off.

A back tension spring 71 applies a load to the turntable 61, and applies appropriate tension to the tape by the load of the turntable during recording and reproduction.

In addition, 69 in Fig. 6 is a cassette holder, which holds the cassette 7.
0 is pressed toward the head side and the protrusion 2c on the chassis 1 (
Figure 1).

In FIGS. 10 and 11, 74 is a slider mounted slidably by a guide on the chassis 1;
It has a protrusion 74a and a bent portion 74b corresponding to the portion 47a on the arm 47. Reference numeral 75 denotes an arm rotatably mounted having a protrusion on its fulcrum and guided by a protrusion of a molded part molded on the chassis, and is made of plate thickness 1 and is rotated by a portion 74b of the slider 74.

14, 15, and 16, 73 is the tape inside the cassette 70, 73a is the recorded portion, 73b is the erased portion, 73c is the unerased portion, 73d is the boundary between the recorded portion and the erased portion, and 73e is the unerased portion. Boundary between erased parts, 73f
is the recording start position after the tape has moved slightly in the direction of arrow C during recording → pause, 73g is the erase start position after the tape has moved, 73h is the recording start position after the tape has moved in the direction of D, and 73i is the same erase start position. It's the location.

Further, when the heads 7 and 8 separate from the tape, the noise positions are close to the lines 73c and 73e. 73c is a portion that is not erased during recording when the recording→pause is slightly moved in the C direction.

Next, the operation will be explained. When the power switch (not shown) is turned on, the motor 54 (FIG. 3) rotates.

If you operate the operation switch (not shown) during recording and playback,
The drive signal for rotating the motor 57 in the direction F in Figure 3 is O.
Become N. At the same time, the play solenoid 14 is driven,
Suction the plunger 15. This suction causes the arm 17 and the arm 20 (FIG. 1), which are interlocked with the pin 16 integrated with the plunger 15, to rotate, thereby moving the head plate 4 toward the tape side. Also, due to the movement of the head plate 4, the cam portion 4a
The winding arm 49, which is released from the restraint, is rotated by the spring, and the winding roller 50' is moved to the winding side turntable 6.
6. Crimp. Further, the pinch roller 12 is pressed against the capstan 9 by movement of the head plate 4, and at the same time, the brake plate 35 is pressed against the turntable 6 by one end of the head plate 4.
1,66 and the brake is released. This state is shown in FIG. When pausing or stopping, the drive signal for the play solenoid 14 is released, and at the same time the motor 57
Also cancels the drive signal.

As a result, the head plate 4 is returned to the stopped position by the return spring 72. Next, when the recording and playback switch (not shown) is operated, the play solenoid 14 is passed through, and the suction force of the solenoid 14 at that time moves the head plate 4 to the recording and playback position, that is, to the point where the heads 7 and 8 are in contact with the tape. move directly.

The operation of the arm 5 on the head plate 4 during this movement will be explained. As the head plate 4 moves, the arm 5 also moves, and the protruding cam portion 5c of the arm 5 hits the pin 43 on the chassis. When the arm 5 moves further, the cam starts to rotate the arm 5 clockwise, causing the gear 6 on the turntable to rotate.
The claw portion 5a of the arm 5 fits between the teeth of the arm 5. When the head plate 4 further moves, the arm 5 further rotates clockwise due to the cam portion of the arm 5 and the pin on the chassis.
The claw portion 5a in contact with the teeth of the gear 62 is in a state where appropriate pressure is applied due to the elasticity of the plastic. When the head plate 4 further moves in this state, the turntable 62, which is integrally attached to the gear 62, rotates clockwise, that is, in the direction B in FIG. 2, by the claw portion 5a of the arm 5 meshed with the gear 62. . When the head plate 4 moves further, the protruding cam portion 5c comes off from the pin 43. At the same time, the arm 5 collides with the protrusion 2a on the chassis 1 and receives a rotational force about the fulcrum 6 in the direction of the rebound gauge, so that the claw 5a separates from the gear 62 on the turntable 61. The claw portion 5a follows the trajectory A in FIG. In this state, the head plate 4 is at the recording/playback position. Therefore, the gear 62 on the turntable 62 is kept at an appropriate distance from the claw portion of the arm 5. Next, to explain the operation of the claws of the arm 5a when recording and playback stops, when the claws 5a of the arm 5 hit the turntable when the head plate 4 returns, the turntable moves counterclockwise. This is undesirable because it rotates the tape in a direction that causes it to sag.

Therefore, when the head plate 4 returns, the claw 5 of the arm 5
It is necessary that a does not hit the gear 62 on the turntable 61 in order to prevent the tape from sagging.

Now, to explain the trajectory of the claw 5a of the arm 5 and the movement of the arm 5 when the head plate 4 returns, first, when the head plate 4 is at the recording and playback position, the arm portion 5b, pin portion 5e of the arm 5, The pin portion 5e is in contact with it. The arm 5 is biased counterclockwise about the fulcrum 6 by a protrusion 2a on the chassis. At this time, the protruding cam 5c of the arm 5 is located on the right side of the cam and facing it, as shown in FIG. When the stop switch is pressed in this state, the energization of the solenoid is canceled and the head plate is returned to its original position by the return spring 72. During this return, the protruding cam 5c of the arm 5 first hits the pin 43 on the chassis, and the arm 5
is further rotated counterclockwise, that is, in a direction away from the turntable 61. Further, when the head plate 4 returns and the cam portion 5c moves until it comes off the pin 43, the pin 5e hits the protrusion 2b, and the arm 5 is moved clockwise toward the groove portion 5.
Rotate until the wall side of d hits the pin. The head plate 4 further moves to the same position as the stop state and stops. Therefore, the claw portion 5a of the arm 5 returns without contacting the gear 62 on the turntable 61. At this time, the trajectory of the claw portion becomes the trajectory shown in Fig. 1. As described above, during recording and playback, the feed-out turntable 61 is rotated in the tape return direction (counterclockwise) by the arm and pawl that interlock with the head plate, and the protrusion of the tape reel that has ridden on the clutch is reliably removed and the operation is performed. This prevents an abnormal load from being applied to the tension of the output tape, prevents deterioration of wow and flutter when the tape is rotated on the tape, and prevents the arm and claw from moving against the turntable when the head plate returns due to the stop operation. It's structured so that it's a whiff.

Next, to explain the pause device, when recording → pause, the head plate 4 moves and the pinch loft 12 and take-up roller 50' are moved to the capstan 9 and turntable 6, respectively.
5, the heads 7 and 8 on the head plate 4
Noise recording parts 73d and 73e when the tape leaves the tape, and a noise erasing part 73c caused by a slight movement of the tape position.
' can be done. The noise recording portions 73d, 73e and the unerased portion 73c have been present to some extent in most conventional devices during the type of pose in which the heads 7, 8 move. This is because after the head has left the tape, there is some tape sag left where the head was inserted.
This is because this part is left in an unstable state, and the tape will move slightly when the head enters the recording state next time. Another factor is that the tape moves slightly depending on the timing of the take-up roller 50', the pinch roller 12, etc. In particular, in the method of operating the head plate 4 by energizing the solenoid, the speed at which the head plate 4 enters is extremely fast, so when the heads 8 and 9 enter the tape, the state of the tape is unstable and may vary depending on the tape load balance. The positional shift is likely to occur, and the situation shown in FIG. 15 is likely to occur. Therefore, in the embodiment of the present invention, when recording→pause→recording, the head plate 4 returns from the recording position to the stop position and then moves to the recording position, as described above. During this return process of the head plate 4, the claw portion 5a of the arm 5 on the head plate 4 does not rotate the turntable 61, as described above. When the head plate 4 is in the recording position, the claw portion 5a of the arm 5 on the head plate 4 meshes with the gear on the feed-out turntable 61.
The delivery side turntable 61 is rotated in the direction of rewinding the tape to the delivery side, in the direction B in FIG. 2. Therefore, since the tape moves in the direction of arrow D on the feeding side, it is in the state shown in Fig. 16,
At the same time as the unerased area disappears, the noise recording section 73e generated when the recording head leaves the heads 7 and 8 is erased during the next recording, so that almost no noise remains on the tape. It is sufficient that the amount of movement in the D direction is about 0.5 ribs or more.
As described above, this is an extremely effective means for reliably reducing the amount of unerased material on the tape in the pause device at a low cost. Furthermore, during reproduction, tape sag is removed for the above reason, so that the appropriate tape tension for the head is quickly established, and the fluctuation in the rise of the reproduced sound is also reduced. Next, another method for reducing the unerased area on the tape and the noise recording when the head leaves the tape for the type in which the head plate is lowered during recording→pause will be described. Recording → Pause → When recording, as mentioned above, the 14th
Based on the tape and head positional relationship shown in the figure, when the tape and head positional relationship is as shown in FIG. 15, the portion 73c' becomes an unerased portion. Further, the portion 73a becomes a noise portion, and when the recording is finished and played back, it can be heard as the noise remains unerased. Therefore, by adjusting the tape and head positions as shown in FIG. 16, there will be no unerased portions, and the noise portion 73d generated when the head leaves the tape will also be included in the next recording signal, making it inaudible but minimal. Therefore, at the time of recording → pause, the tape was rewinded momentarily to meet the above conditions, that is, the 16th
This is an extremely effective means of reliably achieving the state shown in the figure. First, during recording and playback, the motor 57 rotates in the F direction, rotates the take-up pulley 50 via the pulley 27, rotates the turntable counterclockwise with the take-up roller 50', and connects the pinch roller 12 and the cap. The tape fed out by Stan 9 is wound up. During rewinding, the motor 57 rotates in the same direction as during recording and reproduction, that is, in the F direction, thereby rotating the pulley 27 and the pulley 25 via the friction mechanism.

At the same time, a signal that drives the solenoid 51 causes the plug to:
/Aspirate jar 52. The arm 44 is rotated clockwise (fourth
(Figure). The arm 41 is biased counterclockwise by a spring 43, and one end of the arm 41 restrains the pulley 30 from being pressed against the pulley 25 by the spring 39. Pin 4 on said arm 44
6 rotates the arm 41 clockwise against the spring 43, thus moving the arm 41 in the H direction in FIG.

This changes the state from the state shown in FIG. 6 to the state shown in FIG. 7, that is, the pulley 30 is pressed against the pulley 25 by the spring 39. Furthermore, as the arm 41 moves, the brake plate 35 also moves to the right, so that the turntable is moved by the brake plate 35.
is released. Since the pulley 30 is rotatably mounted on the swing arm 28 by a friction mechanism including a felt 29, a spring 31, a spring receiver 32, a washer 33, etc., when the pulley 30 is in the state shown in FIG. When rotating in the F' direction, the pulley 25 swings toward the winding-side turntable 66, and when rotating in the F' direction, swings toward the feeding-side turntable 61, thereby rotating each turntable. Therefore, the present invention utilizes a motor 57 that rotates in the same direction during recording and playback and during rewinding, and by passing the rewind signal momentarily during recording → pause, the tape is moved slightly toward the head and to the left. Try not to move.

That is, to explain according to the time chart shown in FIG. 13, when the pause switch (not shown) is pressed during recording, the drive signal for the motor B57 is instantaneously turned OFF, the play solenoid drive signal is also instantaneously turned OFF, and at the same time, the fast forward/rewind solenoid 51 is turned off. The drive signal turns OFF at time t, and then turns OFF. The motor 57 loses the drive signal, so even if the solenoid 51 turns on, it is in a rewinding state, that is, the turntable 61 cannot be rotated. However, due to the inertial energy of the motor 57 and the inertial energy of the motor pulley 58, , time rotates due to inertia. Therefore, it is clear that the turntable 61 may rotate slightly due to the unwinding time. Therefore, it is clear that by varying the drive time t2 of the solenoid 51, the rotation angle of the turntable 61 also changes. By slightly rotating the turntable 61, the tape is momentarily moved to the left against the head during recording→pause. That is, this state results in the relationship between the head and the tape shown in FIG. 16 being incorrect.
Therefore, when recording in this state and then pausing, the tape is rewound for a moment, the head plate is placed in the paused state (same as the stop position), and then when recording is started again, the relationship shown in Figure 16 will occur.
It is possible to eliminate the unerased portion 73c' and the noise in the portion 73d in FIG. 15. Further, there is no need to newly provide a special device for this purpose, and the above-mentioned defects can be largely overcome by partially improving the circuit. Next, the features of this device during fast forwarding and rewinding will be explained.

As can be seen from FIGS. 6, 7, and 8, a brake plate 35 is slidably attached to the pulley holder 37, and is guided by a guide protrusion 37a. Further, the brake spring 36 is attached to the boss portion of the pulley holder 37 in a direction that presses the brake plate 35 toward the turntables 61 and 66. This state is shown in FIG. At this time, the cam portion 35a of the brake plate 35 has a gap with respect to the cam portion 37a, and has a certain degree of freedom in both left and right directions. This degree of freedom allows the brake plate 35 to bite or escape depending on the direction of rotation of the turntable, making it possible to prevent the tape from sagging. That is, in FIG. 1, an angle 8 is formed connecting the brake contact point 1 between the guide 37a and the turntable 66 and the center of the turntable, and due to this angle 6, when the brake is activated while the turntable 66 is rotating clockwise, the angle 8 is formed. This is the included angle. Conversely, when the brake is activated while rotating counterclockwise, the brake plate 35 moves in the escape direction by the amount of play between the cam of the brake plate 35 and 37a. On the steering side, for the same reason as above, the contact point 1' between the brake plate guide 37a, the turntable 61, and the brake is
Let the angle formed by the center of the steering turntable 61 be a2. When the brake 35 is actuated while the delivery turntable 61 is rotating counterclockwise, the brake 35 moves to the biting side, and when it is rotating clockwise, it moves to the escape direction. Therefore, in the tape mounted state, fast forward →
When stopping, the turntable rotates counterclockwise, so the brake on the feed side becomes the biting side and the take-up side becomes the escape side, causing the tape to slacken and come to a surprising stop. Conversely, when rewinding and stopping, the delivery side 61 is at the relief angle, and the winding side 66 is at the clearance angle.
is the biting angle, and the tape stops without slack.
Having a gap between the cam portion 35a and the guide pin 37a in this way increases the braking effect and is effective. However, when flakes are used for other than unnecessary stops,
Because of this gap, the gap between the brake and turntable becomes unstable, and there is a risk that they may come into contact with each other. In addition, a large movement is required to prevent contact, but in this case, due to other constraint conditions, such as a restriction on the amount of movement of the brake by the brake plate 4 during regeneration, the brake plate cannot actually be moved. The amount of movement is limited. Therefore, in order to prevent the brake from hitting the turntables 61 and 66 even if the brake plate 35 moves a small amount, the brake plate 35
5 is provided with a cam portion 35a, and a brake guide protrusion 37a is provided.
Set to maintain an appropriate clearance. Therefore, the stroke required to move the brake plate away from the turntables 61 and 66 is small, and the structure is simple. Next, when fast forwarding and rewinding, the arm 41 is rotated by the drive signal of the solenoid 51 to release the brake plate 35 from the turntable, and the swinging arm 28, which is released from the restraint by the arm 41, slides through the elongated hole 28a and springs 39 presses the boley 30 onto the pulley 25.

In this state, the swing arm 28 can swing according to the direction of rotation of the pulley 25. The protrusion 28b on the swing arm 28 contacts the brake plate 35 to keep the pulley 30 in an appropriate vertical position. Further, the moment of the spring 39 exerts a force that presses the brake plate 35 against the 37 portion. Therefore, the brake plate 35 is vertically regulated with an appropriate pressure to avoid rattling. The pulley 25 rotates in directions E' and F' depending on the direction of rotation of the motor 57, and depending on the direction of rotation, the swinging arm 28 moves to the take-up side turntable 66 when the rotation direction is E', and to the payout side when the rotation direction is F'. Each turntable 61 is rotated. It is known that the force for swinging the swing arm 28 at this time is determined by the friction torque between the pulley IJ-30 and the friction material 29 such as felt. However, the actual moat has negative loads such as friction loss between the portion 28b and the brake plate 35. Furthermore, if the spring 39 is fixed on the pond side, not on the shaft 34 side, the spring 39 will be stretched from 1 to 1' in FIG. 9 when the swing is made. This creates a negative load. For this reason, rocking force is required to overcome the above-mentioned negative load. For this purpose, it is necessary to increase the frictional force between the pulley 30 and the friction material 29. However, this frictional force results in friction loss during fast forwarding and rewinding, so it is better to suppress it as small as possible for more efficient power transmission. Therefore, the friction loss of the brake plate 35 and the spring 39 described above are
It is necessary to minimize the load caused by stretching. Therefore, it is not necessary to stretch the spring 39 when the swing arm 28 swings. That is, it relates to a device that does not generate a negative load, and instead of fixing the end of the spring hung on the shaft 34 to the pulley holder 37, as shown in FIGS. 6, 7, 8, and 9, The washer 40 is rotatably attached to the boss part of the pulley holder 37, and is prevented from coming off by the claw part 37b. A spring hook part such as a hole is provided on the washer 40, and the other end of the spring 39 is hooked to the spring hook part of the washer 40. As a result, the center of rotation of the swinging arm 28 and the spring 3 when the swinging arm 28 swings.
The rotation centers of 9 coincide. Therefore, when the swing arm 28 swings, the spring 39 is not stretched and the mounting distance does not change, so the swing arm 28 swings extremely smoothly. Furthermore, as mentioned above, this device combines a fast-forwarding and rewinding oscillation device, a power transmission device, and a brake device on the extremely compact pulley holder 37, so that the power transmission from the motor and the drive of the solenoid 51 are combined. By controlling the arm 41, the winding turntable 6 is rotated according to the rotational direction of the motor 57.
6 drives the delivery turntable 61, and when a tape is loaded, fast-forwards and rewinds the tape.

Next, an invention relating to a detection device for so-called inter-track detection or sentence detection, which detects signals on a tape at high speed and stops the tape at the beginning or end of a predetermined signal, will be described.

During recording and playback in this device, as described above, the brake plate 4 is advanced toward the cassette by the related operating members such as the arm by the drive signal of the motor 57 and the drive signal to the solenoid 14, and the head plate is moved by the protrusion 23 on the chassis. 4 is positioned and the tape is run and wound.

Also, for fast rewinding and fast forwarding, the tape is fast forwarded or rewound as described above by the drive signal of the solenoid 51 and the drive signal of the motor 57. Figure 4, Figure 10, Figure 1
1 and 12, the operations of the slider 74 and arm 75 for fast forwarding and rewinding will be explained as follows.
By operating a fast forward or rewind switch (not shown), the solenoid 51 is actuated and therefore the pin 53, which is integrally attached to the plungers 52, 52, is attracted, and the pin 53 causes the arm 44 to center around the fulcrum 45. The arm 41 is rotated to the spring 4 by the pin 46 at the end.
3, the power of the motor 57 is transmitted to the turntable as described above, and the brake is released. Further, since the pin 46 is inserted into the deepest hole 48c of the arm 48, the arm 48 is laid around the fulcrum 47, and the one end 48
b makes contact with the pin at one end of the winding arm 49 and restrains the winding arm 49 vertically to the extent that the winding roller 50' does not contact the turntable 66. Also, the pond end 48 of the arm 48
a moves the protrusion 74a of the slider 74 in the direction. This causes the bending portion 74b to rotate the arm 75.
The other end of the arm 75 is rotated so as to protrude from the end surface of the head plate 4 along the projection 23 on the chassis. As described above, when rewinding or fast forwarding, in addition to rotating the turntable 61 or 66, the take-up roller 50'
At the same time, the arm 75 is held in a position protruding from the surface of the bed board 4.

Next, when the playback switch is operated while the rewind/fast-forward mode is maintained, the head plate 4 moves as described above and attempts to enter the playback state, but the head plate 4 is moved between the protrusions on the chassis.
Since there is an arm 75 between 3 and 3, it hits the arm 75 and stops.

Assuming that the thickness of the arm 75 is 1, the arm 75 is held at a position retreated by 1 from the time of playback. However, since the pinch roller 12 is configured so as not to hit the capstan when retracting by this amount, the tape is not driven between the capstans. Also, since the take-up roller 5o' is restrained by one end 48b of the arm 48 so as not to hit the turntable 66, the tape is not in the playback state, and the heads 7 and 8 on the head plate 4 are moved one step away from the playback position. It is touching the tape in the retracted position. Therefore, in this state, power transmission during fast forwarding or rewinding is limited to the turntable 6.
1 or 66. Therefore, the tape moves at high speed on the head surface in the fast forward or rewind direction, and signals can be detected by the head 7. Explaining according to the time chart of FIG. 13, for example, when the song interval detection switch is operated, the fast forward/rewind solenoid 51 is driven and at the same time, the drive signal for the motor 57 is turned on. After a delay of time t3, the play solenoid 14 is further driven. In this state, the high speed detection state described above can be achieved. When a predetermined signal is detected, the system is stopped for one day by electronic operation. Therefore, in this state, the tape is stopped by the brake, and the arm 75 is located below the original head plate 4. Thereafter, a regeneration operation signal is driven t4 hours after the immediate stop signal, and the motor 54 and play solenoid 14 are driven to move the head plate 4 and position it with the protrusion 23 on the chassis. Therefore, in this position, the pinch roller 1
2 is pressed against the capstan 9 to drive the tape, the take-up roller 50' hits the turntable 66, and the motor 5
It transmits the rotational power of step 4 and winds up the tape. If you operate the song interval detection switch in this state, that is, during playback, you will first go through the stop state and then go to the fast forward/rewind switch as described above.
After t has elapsed since the field 51 and motor 57 are driven, the play solenoid 14 is further driven and the tape runs at high speed. As described above, by providing the arm 48, slider 74, and arm 75 associated with the fast forward/rewind member and further controlling the timing with logic, high-speed detection is easily possible.

As described above, the present invention enables song selection by driving the fast forward/rewind solenoid and the play solenoid with a time difference. Accordingly, according to the present invention, a dedicated solenoid and drive device for song selection as in the past are not required. Therefore, it is not only inexpensive, but also requires no dedicated solenoid, so it does not require installation space and can be made smaller. It also has the versatility of a solenoid-driven cassette tape recorder mechanism that does not require a music selection function. ,
Since the music selection function can be made available by simply adding a small number of components, it is suitable for mass production.

[Brief explanation of drawings]

FIG. 1 is a plan view of the embodiment of the present invention in a stopped state, and FIG.
The figure is a plan view of the recording/playback state, Fig. 3 is a plan view of the drive system in the stop state, Fig. 4 is a back view, and Fig. 5 is a plan view of the drive system in the stop state.
A cross-sectional side view taken along the line V-V in the figure, Figure 6 is the town of Figure 1.
7 is a sectional side view taken along the town line, FIG. 7 is a sectional side view in the fast-forwarded and rewound state, FIG. 8 is a plan view in the rewound state, FIG. 9 is a partial sectional view of the spring part, and FIG. 10 is a sectional view of the spring part. FIG. 11 is a perspective view of the slope of the head, FIG. 12 is a sectional view, FIG. 13 is an operation time chart, and FIG. 14 is a positional relationship between the head and tape. Fig. 15 is a diagram showing the relative positions when the tape is stopped, Fig. 15 is a diagram showing the relative positions when recording/playback → recording/playback after a pause, and Fig. 16 is a diagram showing the relative positions when recording/playback after the improvement of the present invention → recording/playback after a pause. A layer diagram is shown. 4...Head plate, 7...Head, 14...Play solenoid, 23...Protrusion, 51...Fast forwarder return solenoid, 75...Arm. Fig. 5 O Fig. 5 Fig. 1 Fig. O 7 Fig. Fig. 8 O Fig. O Fig. O'2 Fig. 2 Fig. Figure 5

Claims (1)

[Claims] 1 During the song selection operation, the fast forward rewinding solenoid is driven to move the head plate backward to create a fast forward rewinding state in which the head is separated from the cassette tape, and at the same time, the regulating member is opposed to the positioning stopper when the head plate moves forward, and the high speed rewinding solenoid is activated. A play solenoid is driven to bring the playback state a predetermined time later than the drive, and the head plate is moved forward and brought into contact with the regulating member to bring the head into contact with the tape, but the playback state is not reached and the fast forward/rewind state continues. A cassette tape recorder characterized in that a music selection state is maintained continuously.