JPS59215048A - Small-sized cassette tape player - Google Patents

Abstract

PURPOSE:To simplify the structure and to change over surely the reproducing direction by driving a locking member of a changeover gear switching the direction of reproduction by an end detecting mechanism to release the lock of changeover gear and attain end detection. CONSTITUTION:When the turning of a reel stand stops at tape end in the automatic reversing, a reel PLAY gear 40 is stopped and the turning of a friction gear 41 meshed therewith is stopped. An end detecting arm 56 coupled to an end detecting washer 55 whose torque is provided by a gear 41 in the direction K via an engaging pin 56a and sliding a cam face of a cam 54a of a friction gear 54 via a sliding pin 56b with the torque of the washer 55 is stopped at a position where the pin 56a reaches the maximum diameter of the cam 54a and shaken largely by being engaged with a shim part 54 of the gear 54. A boss 56c of the arm 56 presses and turns an N/R lock arm 46, releases the locking of an N/R gear 47 and a PLAY lock lever 18 and the switching operation is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette tape player, and more particularly to a small cassette tape player that is convenient for walking and carrying.

Recently, various types of small cassette tape players suitable for walking and carrying have been developed. However, such small cassette tape players are required to be small and light enough to be portable while walking, which may unavoidably sacrifice functionality, so there is still room for improvement. is the current situation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a compact cassette tape player that is small and lightweight, and yet has sufficient functionality.

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

FIG. 1 shows an overview of a small cassette tape player according to the present invention, in which a lid body 1 containing a cassette holder (to be described later) can be opened and closed with respect to a base body 2 containing reel shafts (to be described later) and their drive mechanism or control mechanism. is attached to. A viewing window 1a is provided in the center of the lid 1 to allow viewing of the rotation of the reels, and a rubber plate is provided at a position facing each reel shaft (not shown), and each has an FF and REW button. 64.65.

When the FF button 64 or the REW button 65 is pressed, the pressing force is transmitted to the head of the opposing reel shaft, the reel shaft sinks and is latched, and an F[or REW operation is performed. The sinking latch mechanism of the reel shaft will be described later.

In addition to the jack hole 3 and the polycomb 4, there is a P on the side of the base 2.
A LAY button 10, a 5TOP button 58, a program switching button 43, and a one-side 5TOP button 62 are provided, and the operation of each mechanism by pressing each button will be described later. Note that the REC button 73 is deleted if the RECI function is not provided.

FIG. 2 shows the mechanical portion of the cassette tape player according to the present invention, with the outer cover made of plastic or the like of the cassette tape player shown in FIG. 1 removed. As shown in this figure, the power of the motor 15 is transmitted to the flywheel 121, 122 and the N/R gear 47 via the belt 120.
It is intended to be transmitted to flywheel 121
, 122 rotating shafts each have a capstan 378.3
7b (described later). Further, the rotational force is transmitted by meshing with gears (not shown) coaxially connected to the flywheels 121 and 122 and the seven-reaction gears 54a and 54b.

FIGS. 3+a+, +t++ and FIG. 4(a), ridges) show the configuration of the head assembly 100 in more detail.

As is clear from the figure, the head assembly 100 includes a cassette holder member 101 that is generally mouth-shaped.

The cassette holder member 101 has pivot members 102a and 102b attached to the chassis 75 at both ends thereof.
The cassette set position is in contact with the chassis 75, and the cassette eject position is away from the chassis 75. Since the cassette holder member 101 and the lid 1 are integrally connected, the cassette set position and the eject position correspond to the gap and closed positions of the lid.

A pivot shaft 30a is embedded in the cassette holder member 101, and a head arm 29 is attached to the chassis 75 on the pivot shaft 30a.
The coil spring 1 is pivotally supported to be able to freely swing parallel to the
04 to approach the cassette holder member 101 (counterclockwise in FIG. 3(b)). A pinch roller supporting member 105a having an opening-shaped cross section is pivotally supported on the pivot shaft 30a. Pinch roller supporting member 1
A pinch roller 36a is rotatably supported at the free end of the roller 05a. The pinch arm 32a is also pivotally supported by the pivot shaft 30a, and a part thereof can come into contact with the surface of the pinch roller supporting member 105a on the pinch roller side, and the pinch arm 32a and the pinch roller supporting member 105a are connected by the pinch spring 35a. is biased so that they come into contact with each other. In addition, 5- pinch roller supporting member 105a and cassette holder member 1
A relatively weak coil spring 106a is provided between the pinch roller support member 105a and the pinch roller supporting member 105a, and the pinch arm 32a is brought into contact with the head arm 29. The coil spring 106a is further interposed between the cassette holder member 101 and the pinch roller support member 105a, and thereby presses the pinch roller support member 105a against the locking portion of the pivot shaft 30a to position the pinch roller 36a. It also works.

It is preferable that the pinch springs 35a are formed so that their free ends are close to each other so that their points of action are close to each other, since there is no reaction that would cause the pinch springs 35a to twist.

Furthermore, as is clear from FIG. 4(a) (mountain), the mechanism supporting the other pinch roller 36b is
6a, and therefore will not be described in detail.Furthermore, a guide member 1076- is fixed to the member 101 near the head side of the pinch roller 36b to guide the tape.

FIG. 5(a), Mt.) corresponds to FIG. 4(a), Mt.), and shows the configuration when the cassette tape player has an RFC (recording function).
0 is pivoted on the pivot shaft 30b, and the erasure arm 110
An erasing head 112 is rotatably supported at the free end of the head and supported via a supporting member 111 made of synthetic resin or the like. A coil spring 113 is wound around a part of the bottle-shaped portion 107a of the guide member 107, and the support member 111 is biased clockwise in the figure against the member 101. As a result, the support member 111 is pushed against the wall 107b of the guide member 107. The erasing head is positioned by being brought into contact with it.

FIG. 9(a) is a sectional view of the reel unit. 9th (
In Fig. a, a reel shaft 74 to which a gear 71 is fixed is held movably up and down by a reel base 76 attached to a chassis 75.
In contrast, the spring 77a is biased in the opposite direction. A reel stand 42 and a stopper 66 are movably fitted into the upper end of the reel shaft 74.
A spring 77b is interposed between the stopper 66 and the stopper 66.
is biased upwardly against the reel shaft 74 by a spring 77c having a spring pressure greater than that of the spring 77b.

A cap 78 is fitted to the upper opening of the reel stand 42, and six protrusions, so-called blades 79, are integrally formed on the peripheral wall of the reel stand 420. Feather 79 is the tenth
As is clear from the figure, in the peripheral wall into which the hub hole of the cassette half is fitted, the front surface of the blade 79 in the winding direction (in the direction of the arrow in the figure) is perpendicular to the winding direction near the bottom of the reel stand, and the reel rises. The upper inclined portion of the reel stand 42 is formed to extend radially with respect to the center of rotation.

A reel PLAY gear 40 is fitted to the lower end of the reel shaft 74 so as to be movable up and down. The reel PLAY gear 40 is urged upward by a spring 80 with respect to the reel shaft 74, and is also urged upward by a protrusion 39a of a reel arm 39, which is a suppressing member, pivotably supported by a reel base 76. Movement to is regulated. reel arm 3
A spring 9 (not shown) having a spring pressure greater than that of the spring 80 presses the reel P LAY gear 40 downward against the elastic force of the spring 80 to restrict movement.

In the lock arm 26, the claw portion (lock portion) 26b is provided at a position away from the swinging fulcrum, as is clear from FIG. 7, but as is particularly clear from FIG. Since the proximal portion 26C of the claw portion 26b is held between the chassis surface and the claw portion 76a of the reel base 76, the reel shaft does not rise from the chassis surface even when the springs 77a and 77c act. 74 can be reliably locked in the operating position.

The reel units with this configuration are NOR (normal) and R.
A pair of reel stands are provided corresponding to EV (reverse), and the top of each reel stand 42 is in contact with the ``[ button 64 and RFWFF button 64'' shown in Figure 10-1. Button 64 (or RE
By pressing the W button 65), the reel stand 42 and the stopper 66 first sink against the elastic force of the spring 77c, and in the process, the stopper 66 hits the claw part 26b of the lock arm 26 with its tapered part. The reel FF gear 71 engages with the friction gear 54 by pressing and rotating the lock arm 26, and then further sinking against the elastic force of the spring 77a, as shown in FIG. 9(b). As a result, the reel shaft 74 rotates, but the reel stand 42 does not rotate because of the pressing force acting on it. When the pressing force is released, the stopper 66 is locked by the claw portion 26b of the lock arm 26, and the reel base 42 is rotated. Only the stand 42 is the 9th (C)
) As shown in the figure, the reel rotates at high speed together with the protruding reel shaft 74 due to the elastic force of the spring 77b.

In this way, the reel unit has a so-called clutch mechanism that rotates only the reel shaft 710-4 when a pressing force is applied to the reel stand 42 while a rotational force is applied to the reel shaft 74. According to this, from RFW mode to FF mode (
(The same is true vice versa), both reel stands will not rotate in opposite directions at the same time. That is, when both reel stands rotate in opposite directions at the same time, a large side pressure is applied to both reel FF and RFW gears through the tape, so that the RFW side gear that should be released from meshing with the friction gear 54 A problem will occur in that the spring 77a cannot be released with only the elastic force of the spring 77a, but by having a clutch mechanism, this problem can be resolved and the FF-REW can be switched smoothly. be.

Further, a spring 80 interposed between the reel shaft 74 and the reel PI AY gear 40 pushes the reel PI AY gear 40 up to the PIAY position where it meshes with the friction gear 41 when the reel arm 39 swings.
Y 1,7J Acts as a spring for 1%, and also acts to provide back tension. Furthermore,
There is a difference in the strokes between the stopper 66 and the reel shaft 74, and after the stopper 66 rotates the lock arm 26 and releases the lock on the other side, the reel FF gear 71 engages with the friction gear 57, and then the stopper 66 locks. Therefore, the FF-RFW switching operation can be performed reliably.

In FIG. 6, the head gear 21 and the N/R gear 47 each have a defective part, and the tooth width in the rotation axis direction of the first tooth or several teeth at the beginning of engagement with the two-stage gear 25, which is the drive gear, is small. The width of the teeth is narrower than the width of the teeth. As a result, since the teeth at the beginning of meshing have elasticity, even if the axial center of each gear 21.47 is shifted from the axial center of the two-stage gear 25, meshing can be performed smoothly.

Next, the operation of the small cassette tape player according to the present invention will be explained for each mode with reference to FIGS. 11 to 31.

First, to explain the PLA Y mode, the first
1, when the PLAY button 10 is pressed to the right in the figure, the PLAY arm 12 is rotated by the PLAY lever 11 in the counterclockwise direction in the figure (in the direction of the arrow) around the pivot shaft 13, The first contact 14a of the leaf switch 14 is turned on (opened), and in response, the motor 15 is turned on.
(shown in the second diagram) begins to rotate. PLA Y arm 1
20 rotations, the swing arm 16 simultaneously rotates around the pivot shaft 17.
The bent portion 16a of the swing arm 16 moves the Pl-ΔY lock lever 18 upward in the drawing. When the PLAY lock lever 18 moves,
The slider 19 is unlocked by the bent portion 18a of the PLAY lock lever 18, and is moved by the elastic force of the spring 20 to the position indicated by the dashed line in the figure.

The headgear 21 is rotated in the cutting direction (direction of arrow B) in the figure in the 5TOP state by the rotational force of the solenoid arm 24 which is urged to rotate in the counterclockwise direction in the figure around the pivot shaft 23 by the elastic force of the spring 220. Rotational force is applied.

When the PIAY lock lever 18 moves, as shown in FIG. Since the headgear 21 is disengaged from the engaging portion 21a and released from the latch, the headgear 21 rotates in the direction of arrow B and engages with the two-stage gear 25.

The headgear 21 rotates about 3/4 in the direction of arrow B by the rotational force of the two-stage gear 25, and first, the outer cam 211) moves the PLAY lock lever 18 upward in the figure via the bin 18tl. The moved P LAY lock lever 1B has a lock arm 2 that engages with its lock portion 18C.
It is locked in the PI AY position by the pin 26a of No. 6. Further, as shown in FIG. 12, when the bin 27a of the switching arm 27 moves in the direction of arrow C in the figure along the inner cam 21C of the headgear 21 and passes over the small protrusion 21d at the innermost diameter part of the inner cam 21c. , headgear 21 as arrow B
It works to rotate in the direction. At this time, the PLA locked by the pin 26a of the lock arm 26
The pin 18b of the Y-lock lever 18 is shown in FIG.
, the headgear 21 comes into contact with the locking portion 21e of the headgear 21 to stop the rotation 14- of the headgear 21. In this state, the arm portion 18d of the PLAY lock lever is not engaged with the bent portion 16a of the swing arm 16, and the force of the spring 28 that biases the PLAY arm 12 to rotate is applied to Pl-△. The Y lever 11 is held at the ON position.

In this way, during the PI-ΔY operation, after slightly pressing the P L A Y button 10, the latch member P
When the l-A Y lock lever 18 releases the latch of the headgear 21 and is driven in the direction of the PIAY position by the driving force of the motor 15, the latch release member PLAY
The PLAY lever 11 and the PLAY button 10 are retracted and automatically locked by the elastic force of the spring 28 which biases the arm 12 in the direction in which the P l 'A Y button 10 is operated. This can be done with a soft touch, providing an excellent operating feel.

When the switching arm 27 moves in the P [ΔY direction, that is, in the direction of the arrow C in FIG. , the head arm 29 moves one inch clockwise in the figure (in the direction of the arrow) about the pivot shaft 30, thereby moving the head 31 forward. In addition,
As shown in FIG. 3(a), the bottle 29a of the head arm 29 has a tapered surface whose outer diameter decreases from the tip to the base. Since the peripheral edge of the square hole 27b of the arm 27 is engaged and pulled in, the head arm 29 is pressed toward the chassis while swinging. Therefore, the height of the head 31 can be determined with respect to the chassis surface, and the head 31 can be reliably positioned with respect to the tape, which is particularly useful in a swing type head support structure. Further, as shown in FIG. 15, the side end of the switching arm 27 can be moved to the bent portion 32a of the NOR (normal) side pinch arm 32 or the REV (reverse) side pinch arm 33.
Press the bent portion 33a. This allows for example NOR
As shown in FIG. 16, the side pinch arm 32 swings about the pivot shaft 34 against the elastic force of the spring 35a, and as shown in FIG. Press it against the Since the left and right inclinations of the switching arm 27 change depending on the difference between the N0Rh direction and the REV direction, either the left or right pinch roller comes into pressure contact with the capstan.

When the tip pin 27c of the switching arm 27 moves to the Pl-ΔY position and is also moved to the left or right by the guide hole formed in the chassis, the reel slider 38 moves to the right as shown in FIG. Alternatively, it moves to the left by a certain amount, and as shown in FIG. 17, the reel arm 39 of the reel unit is rotated in the direction of arrow E in the figure. The P1-ΔY gear 40, which is held by the reel arm 39 at the position shown by the dashed line in the figure, moves to the position shown by the solid line in the figure by the rotation of the reel arm 39, and meshes with the friction gear 41. This causes the reel stand to rotate and P
A LAY operation is performed.

Next, the switching operation between the A side and the IB side of the cassette half, ie, the program switching operation, will be explained taking as an example a case where switching is performed from the NOR direction 17- to the REV direction. In FIG. 19, when the non-locking program (direction) switching button 43 is pressed during PLAY operation in the NOR direction, the manual reverse lever 44 rotates in the direction of arrow F about the pivot shaft 45, and the N/R lock is activated. Set the bottle 46a of the arm 46 to N.

Move it to an intermediate position between R mode and RFV mode. At this time,
The lock bin 46b of the N/R lock arm 46 is
Move away from the NOROR side shoe 97a of the gear 47 and unlock the N/R gear 47.

As a result, the N/R gear 47 is rotated in the direction of arrow G by the elastic force of the reverse spring 49 supported by the reverse arm 48, as shown in FIG. The boss 470 stops at the rotational position where it comes into contact with the stopper portion 18e of the PLAY lock lever 18.

On the other hand, as shown in FIG. 21, the auto stop arm 5o is rotated by the shaft 4t'l of the N/R lock arm 46 in the direction of arrow 1'' in the figure.
When the pin 50a of the lock arm 26 rotates the lock arm 18-26, the lock of the PLAY lock lever 18 by the pin 26a of the lock arm 26 is released. The Pl-AY lock lever 18 has a spring 51 (
As a result, the N/R gear 47 is returned to one direction in the figure by the elastic force of the stopper part 18d of the PLAY lock lever 18, so that the N/R gear 47 rotates and moves into the second gear. It meshes with 25.

The N/R gear 47 is approximately halved by the rotational force of the second gear 25.
When rotated, the lock bin/1 of the N/R lock arm 46
6b comes into contact with the REV side locking lock 7b (shown in Figure 19) of the N/R gear 47, thereby locking the N/R gear 47. At this time, as shown in FIG. 20, the pin 48a of the reverse arm 48 moves along the cam groove 47d of the N/R gear 47, so the reverse arm 48 rotates in the direction of arrow J in the figure. The reverse arm 1 spring 52 carried by the reverse arm 48 switches the N/R slide switch 53 from the NOR position to the REV position. The N/R slide switch 53 connects the NOR side channel of the head 31 and the R side channel.
Either one of the EV side channels is selectively connected to the signal processing system.

When the PLAY lock lever 18 returns, as shown in FIG. Since the small projections 21d of the heads 31. Pinch roller 36 and reel PLA Y gear 40 are 5TOP
Return to state. However, as shown in FIG. 23, the PLAY lock lever 18 has a bent portion 18a that
The bottle 18b comes into contact with the stopper part 19a of the headgear 21 and stops at the neutral position.
Since the headgear 21 is not locked by engaging with the solenoid arm 24, the headgear 21 is engaged with the two-stage gear 25 and rotated by the rotational force of the solenoid arm 24. Since the reverse arm 48 has moved to the REV side, the switching arm 27 is
7a moves along the inner cam 21C of the headgear 21, thereby moving while tilting toward the REV side, resulting in a reverse P l-A Y state.

In addition, program cut IIJ! During operation, while the program switching button 43 is pressed, the manual reverse lever 44 is in the position shown by the dashed line in FIG. By blocking the movement and prohibiting direction switching, and releasing the pressure on the switching button 43, the PL, AV lock lever 18 is moved and the direction switching is performed. According to this, even if the switching button 43 is pressed for a long time, the N0R-REV switching operation will not be repeated, so switching in the desired direction is reliably performed. In addition, in the 5TOP state, the bent portion 18 of the PLAY lock lever 18
a is located at the shaded position in FIG. 19 and restricts the rotation of the manual reverse lever 4/I, so the program switching button 43 cannot be pressed 21-. That is, transition to the program switching mode is possible only from the PLAY mode, and transition from the 5TOP mode is prohibited.

Next, regarding auto-reverse operation, from the NOR direction to the RE
An example of switching to the V direction will be explained.

In FIG. 24, when the rotation of the reel stand 42 stops at the end of the tape, the reel PLAY gear 40 stops, and furthermore, the rotation of the friction gear 41 meshing with the reel PLAY gear 40 stops. Then, during PLAY,
Friction torque is applied by the rotation of the friction gear 41, and the rotational force is no longer applied to the end detection washer 55, which had been applied with rotational force in the direction of the arrow in the figure.
As shown in FIG. 5, it is connected to this end detection washer 55 via an engagement pin 56a, and the rotational force of the end detection washer 55 slides on the cam surface of the cam 54a of the friction gear 54 via a sliding pin 56b. The end detection arm 56, which had been previously installed, stops its engagement pin 56a at the maximum diameter position of the cam 54a, and engages with the shim portion 54b of the flick 22-jong gear 54.
It sways even more violently. At this time, the end detection arm 56
The boss portion 56c presses the N/R lock l\46,
By rotating the N/R gear 47 and PLA
After the Y lock lever 18 is unlocked, the same operation as the program switching operation described above is performed.

When performing 5TOP@ work, in Figure 26,
When the TOP button 58 is pressed, the pressing force is 5TOP.
It is transmitted to the 5TOP arm 60 via the lever 59,
The 5TOP arm 60 rotates about the pivot shaft 61 in the direction of the arrow in the figure, causing the lock arm 26 to rotate in the direction of the arrow 1 in the figure. In the P l-A Y state shown in FIG.
When the lock arm 26 rotates, the pin 26a of the lock arm 26 is released from the lock portion 18c of the PLA Y lock lever 18 and the lock is released.
It is returned to the OP direction. Since the slider 19 has already been moved by the 5TOP lever 59 in the direction of the arrow M in FIG. 26 to the position shown by the dashed line in FIG. Therefore, the PLAY lock lever 18 moves to the 5TOP position, and as shown in FIG.
By engaging with the engaging portion 21a of the headgear 21
Lock in the 5TOP position. Also, the arm portion 18d of the PLAY lock lever 18 is connected to the bent portion 1 of the swing arm 16.
By pressing 6a, the swinging arm 16, PLAY
The arm 12 and the P LAY lever 11 are returned to the 5TOP position, and at the same time the first contact 11 of the leaf switch 14 is
a becomes OFF (open), and the motor 15 stops.

As explained above about the auto-reverse operation, when performing the so-called one-side 5TOP operation in which the transition is not made to the auto-reverse operation at the end of the tape but to the 5TOP operation, direction switching is prohibited during PL A Y in Fig. 27. When the one-side 5TOP button 62 is pressed, the one-side lever 63 moves, and the slider 19 is moved in the M direction in the figure by the inclined surface 63a of the claw portion of the one-side lever 63. The moved slider 19 is
As shown in FIG. 28, the one-side lever 63 is locked by engaging the engaging surface 63b of the claw portion with its bent portion 19b. In this state, when the end detection of the end of the tape is activated, the PL and AY lock 1 collar 18 is unlocked and the PI AY lock lever 18 returns to the 5TOP direction, similar to the auto-reverse operation described above.

During the return process of the PI AY lock lever 18, the bent portion 18a pushes the inclined surface of the stopper portion 19a of the slider 19, thereby slightly moving the slider 19 in the M direction in the figure, and the one-side lever 63 is moved by the bent portion 19b. 11 and return to the 11 STOP state. At this time, the headgear 21 and the PLAY arm 12
etc. are in the 5TOP state, and the motor 15 is stopped.

Next, the so-called music search operation 25-, which detects the interval between songs during high-speed playback and automatically returns to the PLAY state, will be described. First, during PLAY, when the FF button 64 (or RFWFF button 64 shown in FIG. (Transition from the state shown in FIG. 9(a) to state b+), and in the process, the stopper 66 rotates the F/R arm 67 as shown in FIG. The second contact 14b is also turned on (opened).By turning on the second contact 14b, the solenoid 69 is energized, and as shown in FIG.
A movable iron piece 70, which is swingably supported by a pivot shaft 24a, is attracted to the end of 4. In addition, the stopper 66 of the reel stand 42 rotates the lock arm 26 and
After unlocking the lock lever 18, as shown in Fig. 9 (
As shown in C), it is locked by the claw portion 26b of the lock arm 26. As a result, the reel FF gear 71 and the 7-reaction gear 54 mesh with each other, resulting in a fast-forwarding state.

On the other hand, the PLA Y lock lever 18 is unlocked.
6- When the headgear 21 is removed, the headgear 21 rotates, but since the solenoid arm 24 is held in the suction position by the solenoid 69, as shown in FIG.
30 and 3 due to the tip of the solenoid arm 24.
It is locked in the music surge position shown in Figure 1. This causes the switching arm 27 to switch between the PLAY position, S, and TOP positions.
Since the head 31 and the pinch roller 36 are held in the middle position, the head 31, the pinch roller 36, etc. are in the same state as in the 5TOP.

When a song interval arrives, a song interval detection circuit (not shown) is activated, and in response, the solenoid 69 is turned off, and when the lock by the solenoid arm 24 is released, the headgear 21 moves to the P L A Y position. Rotate. The cam part of the headgear 21 locks the PLA Y lock lever.
18 moves, the lock arm 26 is rotated to unlock the reel stand stopper 66, and the reel stand 42 returns to its original position and enters the PLAY state.

Note that when the one-side 5TOP button 62 is pressed during music search, the stopper part 19a of the slider 19 switches to the PLAY position, similar to when the one-side 5TO drive is activated.
The lock lever 18 moves to a position where it does not come into contact with the bent part 18a, and the unlocked P LAY lock lever 18 returns to the 5TOP position, so the song interval detection 4G P
It does not shift to LAY mode and enters the 5TOP state. That is, the one-side 5TOP button 62 and its related members function as mode switching prohibition means. Also, during music search, the FF that is on the winding side
When the button 64 or the REW button 65 is pressed, the above-mentioned reel clutch mechanism stops the rotation of the reel stand 420 and tape running stops, so the output of the head 31 goes into a no-signal state, and the above-mentioned song interval detection circuit is turned off. Since it is determined that the current state is currently in progress, it shifts to the PLAY state. Therefore, F.F.
By simply pressing the button 64 or the REW button 65, any program can be easily reproduced any number of times. Furthermore, as shown by the two-dot chain line in FIG. 30, a normally closed pause switch 72 is inserted into the power supply line of the solenoid 69, and this pause switch 72 is turned on (opened) during music search.
By turning off the solenoid 69, it is also possible to cancel the music search operation and shift to the PLAY mode.

Next, the recording (RFC) operation will be explained.

First, when the RFCFF button 64 shown in FIG. 1 is pressed, the tip 81a of the RFC lever 81 is turned to
The bottle 46a of the /R lock arm 46 is pressed to enter the NOR state, and recording operation is always possible only in the NOR state.

Furthermore, the bent portion 81b of the RFC lever 81 is
9 to move the stopper part 19a of the slider 19 to the PI position.
Since the bent portion 18a of the AY lock lever 18 is evacuated from the movement path, when the end of the tape arrives and end detection is activated, the PLAY lock lever 18 is unlocked.
The P'LAY lock lever 18 returns to the 5TOP position without being prevented from moving by the slider 19, and the 5TOP
state. In the RFC state, the bent portion 81b of the REC lever 8129- located at the shaded position in FIG.
This prevents the operation of the program and prohibits program switching.

Note that the pin 110a of the eraser arm 110 is connected to the RFC
The erasing head 112 is pressed by the operation of the lever 81.
moves forward.

As explained above, according to the present invention, a switching gear and a locking member that control switching of the playback direction are disposed between a pair of end detection mechanisms that perform end detection in conjunction with a pair of reel mechanisms, respectively. The locking member that locks the switching gear at two locking positions corresponding to the direction is driven by a pair of end detection mechanisms and takes an intermediate position between the two locking positions, thereby unlocking the switching gear and detecting the end. This eliminates the need for a link mechanism that conventionally connects a pair of reel mechanisms to prevent false detection, making it possible to create a compact cassette tape player that has a simple structure and can reliably switch the playback direction. 1q is received.

[Brief explanation of drawings]

30- FIG. 1 shows the small force I according to the present invention? A general view of the foot hoop player, FIG. 2 is a perspective view showing the internal mechanism of the player, FIGS. 3 and 4 show the shoulder line of the head assembly in FIG. 2, and (a) is a front sectional view. , crest) is a plan view including a partial cross section, FIG. 5 shows a part of the head assembly when it has an RFC function, (a) is a front sectional view, and crest> is a plan view including a partial cross section. , Figure 6(a) is a plan view showing the player mechanism on the back side of the chassis, Figure 6(a) is a front view thereof, (C) is a side view thereof, and Figure 7 is a plane view showing the player mechanism on the front side of the chassis. 8 is a plan view showing the gear mechanism of the play V mechanism section, and FIG. 9 is a sectional view showing the reel mechanism, in which (a) is a non-operating state, +tn is a state where the reel stand is pressed down, ( e) shows the operating state in which the reel shaft is locked in the operating position, FIG. 10 is a plan view showing the blade shape of the reel stand, and FIGS.
The figure is an operational diagram of each part for explaining the vJ operation of the cassette tape player according to the present invention. Explanation of symbols of main parts 1...Lid body 2...Base body 15...Motor 1
8...PI-△Y lock lever 19...
・Slider 21...Headgear 2/I...Solenoid arm 26...Lock arm 27...Switching arm 31...Head 36... ... Pinch roller 42 ... Reel stand 46 ... N/R lock arm 47 ... N/R gear 64 ... FF button 65 ... ...RFW button 74 ... Reel axis applicant Pioneer Co., Ltd. agent Patent attorney Motohiko Fujimura (1 other person) Ka20 Concave book 2fT2J Tail 22 Leap 2 to 27 -315- LQ -1- 11~ 316-1 Pioneer Co., Ltd. Kawagoe Factory, 25-1 Nishimachi, Yamada, Kawagoe City

Claims (1)

[Claims] a pair of reel mechanisms that transport the tape in opposite directions;
and a pair of end detection mechanisms that detect when the rotation of each reel stand of the pair of reel mechanisms has stopped, and bidirectional playback is possible and the direction is automatically changed in response to the operation of the pair of end detection mechanisms. A small switchable cassette tape player includes a switching gear that switches the playback direction by appropriately meshing with a drive gear and rotating, and locking the switching gear at two lock positions corresponding to the playback direction. The cane is provided with a locking member that is driven by the pair of end detection mechanisms to unlock the switching gear by taking an intermediate position between the two locking positions, and the switching gear and the locking member are configured to be driven by the pair of end detection mechanisms. A small cassette tape player characterized by being located between a detection mechanism.