JPS6331211Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention This invention relates to a wire bundle device particularly suitable for use in a tape recorder having an auto-reverse device.

Technical Background of the Invention As is well known, a tape recorder that enables reciprocating recording or playback is called an auto-reverse device. In other words, this auto-reverse device can automatically record or play back during the reverse operation without changing the tape loading state or operation section setting state at the end of the tape during the forward operation, making it possible to record for long periods of time. It is particularly useful when playback is required.

On the other hand, tape recorders these days tend to be more logical, and development in this direction is being actively carried out. This logic-based tape recorder has a touch switch structure for a plurality of operators that put the tape recorder into a predetermined operating state or stop state, and uses an LSI dedicated to controlling the tape recorder, and an electro-mechanical converter such as a solenoid plunger. The various movable members of the tape recorder mechanism are controlled to move to positions where they are activated or stopped in accordance with the operated operator. According to such a logic-based tape recorder, since the operator can be made into a touch switch structure, it is possible to naturally realize soft touch operation of the tape recorder operator, and a solenoid plunger corresponding to the operation of the operator can be realized. Dedicated control means to drive
It only requires one LSI, and has the advantage of being simpler, smaller, lighter, and cheaper to manufacture than conventional fully mechanical tape recorders.

Therefore, attempts have been made to realize an auto-reverse function in logic tape recorders, and various mechanisms have been developed.

Problems with the Background Art However, in the conventional logic tape recorder equipped with the auto-reverse function as described above, the structure is still complex and the advantages of logic are not fully utilized, and the operation is uncertain. Moreover, since it requires a large amount of electric power, it is not suitable for small tape recorders that use batteries.

Purpose of the invention This invention was made in consideration of the above circumstances.For example, it is possible to prevent wire rods extending from an object such as a head whose position changes between the stopped state and the regenerated state from breaking with a simple structure. It is an object of the present invention to provide an extremely good tape recorder wire bundle device that can securely hold wires.

Summary of the invention In other words, this invention uses a tape recorder in which the head approaches and separates from the tape when the tape is running at a constant speed, when the tape is running at high speed, and when the tape is stopped. It is configured to be held at the other end of an elastic member rotatably supported by a support member.

Embodiment of the invention Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings. That is, Figures 1 and 2
In the figure, reference numeral 1 denotes a generally box-shaped main chassis of a compact tape recorder, and various mechanisms described later are installed at the front and rear, upper and lower, and right and left sides of the main chassis. Protruding forward from the lower end of the main chassis 1 in FIG. 1 is an operating section 2 having a touch switch structure, which includes a STOP operating button 2a for stopping and a rewinding switch from the left end in FIG. for
REW controller 2b, for reverse direction (backward action) playback
PLAY R operator 2c, REC operator 2 for recording
d, a PLAY F operator 2e for forward playback, an FF operator 2f for fast forwarding, and a PAUSE operator 2g for pause. Each of these operators 2a to 2g, when touched, supplies an operation signal to a known LSI (not shown) dedicated to controlling a tape recorder, and the LSI controls the tape recorder, which will be described later, in response to the operation signal. An operator 2a that controls the energization of a solenoid plunger that drives various movable members of the mechanical system, and is operated by touching the tape recorder mechanical system.
This is to enable a state corresponding to 2g to 2g. In this case, each of the above-mentioned operation signals is electrically locked once generated, and continues to be generated even if the operation is stopped thereafter. However, the operation signal from the STOP operator 2a is not locked, but functions to stop the generation of operation signals from the other operators 2b to 2g which are in an electrically locked state. In addition, the above PAUSE operator 2g
In connection with a latch circuit (not shown), the first touch operation outputs an operation signal to the LSI, for example, to temporarily stop the playback state, and the second touch operation causes the generation of an operation signal to the LSI. It functions to stop and return to a playback state, for example.

The above LSI has REW and FF operators 2b,
By supplying each operation signal from 2f,
The solenoid plunger that selectively drives the forward/reverse switching mechanism of the high-speed feed system in the tape recorder mechanism system is energized to function to cause the tape to run at high speed in the forward or reverse direction. Also, the above LSI is
When each operation signal is supplied from the PLAY R and PLAY F operators 2c and 2e, the solenoid plunger that selectively drives the forward/reverse switching mechanism of the constant speed feed system in the tape recorder mechanism system is energized. , the tape is made to run at a constant speed in the forward or reverse direction, and the head chassis 3, which is reciprocally slidable in the directions of arrows A and B in FIG. By energizing a solenoid plunger which is driven so as to contact a predetermined surface of the capstan and selectively bring the same pair of pinch rollers 5 and 6 into contact with a pair of capstans 7 and 8, the regeneration state can be set in the forward or reverse direction. It functions as if.

Here, in order to enable playback (recording) in the forward and reverse directions of tape running, that is, forward and backward movements, the upper recording/reproducing head 4 naturally adjusts the azimuth angle accurately and adjusts the tape according to the tape running direction. The head moving mechanism 9 is moved so as to come into contact with the track, and the structure and operation of this head moving mechanism 9 will be described in detail later.

By the way, with a normal tape recorder, all you need to do is playback (recording) in the forward direction, so naturally
One PLAY control may be sufficient, but since the tape recorder that is the subject of this article that enables auto-reverse requires playback (recording) in the forward and reverse directions, there are two independent PLAY controls for the forward and reverse directions.
It is equipped with a PLAY operator. here,
If only one of the two PLAY controls is operated, playback (recording) is possible only in that direction; if both are operated at the same time, so-called auto-reverse is possible, and normal playback ( (recording), you only need to touch the PLAY controller in the forward direction.

In addition, the REC operator 2d in the center of the illustration is
When you use the touch operation in combination with the PLAY operator,
The above configuration allows recording in either forward or reverse direction, or back and forth recording using auto-reverse.
This drives the recording system via the LSI.

Furthermore, protruding from the center of the main chassis 1 in FIG. 1 are a left reel stand 10 and a right reel stand 11, each of which is connected to an automatic stop mechanism, a reciprocating operation switching mechanism, and the like. In addition, in the upper part of the main chassis 1 in FIG. 1, there is a tape counter 12 connected to the right reel stand 11, a motor 13 serving as a power source for each drive system, and an operating lever 1 for the auto reverse number limiting mechanism and manual reverse mechanism.
4,15 are installed.

Here, FIG. 3 shows the forward/reverse switching mechanism of the tape constant speed feeding system taken out from FIGS. 1 and 2 above. That is, what is indicated by a dotted line in the figure is the head chassis 3, which is shown in a simplified manner from that shown in FIG. 1 for the sake of simplicity.
This head chassis 3 has a pair of protrusions 3a and 3b formed at predetermined positions on both sides thereof. And each protrusion 3a, 3b of the head chassis 3
Left and right playback sliders 16 and 17 shown by two-dot chain lines in the figure are arranged in parallel on the lower surface of the head chassis 3.
The through holes 161, 171 formed in the center of each can be engaged with engagement pieces 162, 172 formed at the lower part in the figure. Here, the left and right playback sliders 16, 17 have guide pins 16 formed in the main chassis 1 inserted into a pair of long holes 163, 164 and 173, 174 formed respectively.
5, 166 and 175, 176, respectively, so that they are supported so as to be slidable back and forth in the directions of arrows A and B in the figure, similarly to the head chassis 3.

And the above left and right playback sliders 16, 17
are each biased in the direction of arrow A in the figure by a spring (not shown). The head chassis 3 also includes left and right playback sliders 16,1.
7 is biased in the direction of arrow B in the figure by a spring (not shown) which has a stronger biasing force than the biasing force of the spring that biases 7 in the direction of arrow A in the figure.
Therefore, in the stopped state, since the head chassis 3 is moved in the direction of arrow B, the left and right playback sliders 16 and 17 are moved by their respective engaging pieces 16.
2,172 are protrusions 3a and 3b of the head chassis 3
By being pressed by , it is moved in the direction of arrow B in the figure. The head chassis 3 is operated by the LSI outputting a signal for driving a head chassis moving mechanism, which will be described later, when one or both of the PLAY R and PLAY F operators 2c, 2e are touched. Accordingly, it is moved in the direction of arrow A in the figure against the biasing force of the spring. In addition, the above left and right playback sliders 16 and 17
control an idler, gears, etc. (not shown) for transmitting the rotation of the motor 13 to the left and right reel stands 10, 11, respectively. That is, when the left regeneration slider 16 is slid in the direction of arrow A in the figure, the left reel stand 1
0 is rotated to wind the tape, and playback is performed by running the tape in the reverse direction.
Further, when the right playback slider 17 is slid in the direction of arrow A in the figure, it rotates the right reel stand 11 to wind up the tape, thereby performing playback of the tape running in the forward direction. In other words,
Whether the tape runs in the forward direction or in the reverse direction is determined by which of the right and left reproduction sliders 16, 17 is moved in the direction of arrow A in FIG.

Here, a tapered locking portion 167 is formed on the upper right side of the left base slider 16 in the drawing. Further, a locking portion 177 formed by a substantially concave notch is formed at the substantially central portion of the upper end of the right playback slider 17 in the figure. A reverse drive knob 18 rotatably supported by a shaft 181 protruding from the main chassis 1 is provided on the lower surface of the left and right reproduction sliders 16, 17. The base 182 of this reverse drive lever 18
A bent engagement piece 183 that engages with the locking portion 167 of the left reproduction slider 16 is formed on the left side of the figure. In addition, the base 1 of the reverse drive lever 18
A bent engagement piece 184 that engages with the locking portion 177 of the right reproduction slider 17 is formed on the right side of 82 in the figure. Furthermore, the reverse drive lever 1
A substantially crank-shaped elongated hole 185 is formed on the left side of the base 182 of No. 8 in the drawing.

The elongated hole 1 of the reverse drive lever 18
Inside 85 is a shaft 1 protruding from the main chassis 1.
A protrusion 192 protruding from one side of the gear 19 rotatably supported by the gear 91 is fitted. Therefore, when the gear 19 rotates, the reverse drive lever 18 can swing around the shaft 181 in response to the rotation.
Here, on the other side of the gear 19 opposite to the side on which the protrusion 192 is provided, there is a pair of locks that bite into a lock lever 20, which will be described later, when the gear 19 rotates clockwise in the figure. The locking part 193,1
94 is formed. This locking part 193, 19
4 are formed at opposing positions with the axis 191 as the center. Further, the lock lever 20 is connected to a shaft 2 protruding from the main chassis 1.
01, and is formed with an engaging portion 202 that can be selectively engaged with and disengaged from the locking portions 193, 194 of the gear 19. The lock lever 20 is normally biased by the action of a spring (not shown) in a direction in which its engaging portion 202 engages with the locking portions 193, 194 of the gear 19, that is, counterclockwise in the drawing. Further, this lock lever 20 is used when detecting the end of the tape when switching the reciprocating operation described above (this may be the same as detecting the end of the tape in the automatic stop mechanism) or when operating the operating lever 15 of the manual reverse mechanism (see Fig. 1). The engaging portion 202 is disengaged from the locking portions 193 and 194 of the gear 19 by being rotated clockwise in FIG. 3 against the biasing force of the spring.

On the other hand, a first gear (not shown) is always meshed with the gear 19. This first gear and gear 1
The gear ratio with 9 is set at 1:2, and when the first gear rotates once, the gear 19 rotates by half a rotation. The first gear is formed with a notch without a gear at a predetermined position, and the rotational force from the motor 13 is transmitted to the position opposite to this notch to allow the tape to run. A second gear is provided which rotates in one direction regardless of the rotation speed. When this second gear is meshed with the first gear, it is rotated so as to rotate the gear 19 clockwise in the figure.

In the above-described configuration, suppose that the PLAY R and PLAY F operators 2c and 2e are both touched while the auto-reverse is being activated. Then, the head chassis moving mechanism is driven,
The head chassis 3 is slid in the direction of arrow A in the figure. For this reason, the left and right playback sliders 16,1
Since the protrusions 3a and 3b of the head chassis 3 are disengaged from the engagement pieces 162 and 172, both of the protrusions 3a and 3b of the head chassis 7 are slid in the direction of arrow A in FIG. 3 by the biasing force of the spring. Here, if the engaging part 202 of the lock lever 20 is now engaged with the engaging part 194 of the gear 19 as shown in FIG.
will be regulated to the position shown. Therefore, the right playback slider 17 is sufficiently moved in the direction of arrow A, but the left playback slider 16 is moved at its locking portion 1.
67 is the bent engagement piece 18 of the reverse drive lever 18
3 and is not moved sufficiently in the direction of arrow A. Therefore, the idler and the like controlled by the right playback slider 17 are moved to a predetermined position for rotating the right reel stand 11, and playback in the forward direction is performed here. For this purpose, a recording/reproducing head 4 (see FIG. 1), the details of which will be described later, provided on the head chassis 3 is brought into contact with the tape. Also, at this time, since the reverse drive lever 18 is holding down the left playback slider 16 being biased in the direction of arrow A, a rotational biasing force is applied to the reverse drive lever 18 in the clockwise direction in the figure. This means that the For this reason, the protrusion 192 fitted into the elongated hole 185 of the reverse drive lever 18
The gear 19 having the rotation bias force clockwise in the figure is also applied, but since its locking portion 194 is engaged with the engaging portion 202 of the lock lever 20, the gear 19 does not rotate. The reverse drive lever 18 is stable in the position shown in FIG.

Assume that the tape reaches the end in the forward playback state as described above. Then, as shown in FIG. 4, the tape end detection mechanism described above detects
The lock lever 20 is rotated clockwise in the figure, and its engaging portion 202 is disengaged from the locking portion 194 of the gear 19. At this time, as mentioned earlier, in the state shown in FIG. 3, the gear 19 is given a rotation biasing force in the clockwise direction in the figure, so the gear 19 is slightly rotated in the clockwise direction in FIG. . Then, this gear 1
The first gear meshed with gear 9 is slightly rotated in the opposite direction to gear 19. Therefore, the first gear and the second gear are brought into meshing state, and the gear 19 is rotated clockwise in the figure by the rotational force of the second gear.

When the first gear rotates once and its notch again faces the second gear, the gear 19 rotates exactly half a rotation and the locking portion 193 is the engaging portion 202 of the lock lever 20
is locked. At this time, the reverse drive lever 18 is rotated clockwise in FIG. 5 following the protrusion 192 as the gear 19 rotates half a rotation.
Therefore, the bent engagement piece 184 of the reverse drive lever 18 comes into contact with the locking portion 177 of the right playback slider 17, and the right playback slider 17 is moved backward in the direction of arrow B in the figure. In contrast, the left playback slider 16
Since the bent engagement piece 183 of the reverse drive lever 18 is released from the locking portion 167, the reverse drive lever 18 is sufficiently moved in the direction of the arrow A. Therefore, the idler and the like controlled by the left playback slider 16 are moved to a predetermined position for rotating the left reel stand 10, and playback in the opposite direction is performed here. For this reason, the recording/reproducing head 4 provided on the head chassis 3 is brought into contact with the tape.

Here, the head chassis 3 is once moved backward in the direction of arrow B during the process in which the tape is switched from the forward playback state to the reverse playback state (the same applies to the reverse process). Then, as the left or right reproduction slider 16 or 17 is moved in the direction of arrow A, it is moved in the same direction.

In addition, in the state shown in FIG. 5, the reverse drive lever 18 is holding down the right playback slider 17 being biased in the direction of arrow A, so that the reverse drive lever 18 is biased in the counterclockwise direction in the figure. This means that a rotational biasing force is applied. Therefore, the gear 19 is subjected to a rotation biasing force in the clockwise direction in the figure, but since its locking portion 193 is engaged with the engaging portion 202 of the lock lever 20, the gear 19 is prevented from rotating. Zu reverse drive lever 18
is stable at the position shown in FIG.

When the tape reaches the end in the reverse playback state as described above, the tape end detection mechanism activates the lock lever 20 as described above.
is rotated clockwise in the figure, the gear 19 is rotated half a turn clockwise in the figure in substantially the same manner as described above, and the tape is again played back in the forward direction as shown in FIG. In addition, the tape forward/reverse switching mechanism described above is not limited to operating only at the end of the tape.
It can be easily seen from the above description that the manual reverse mechanism operates when the operating lever 15 is operated, and the tape running direction can be switched between forward and reverse directions at any time during tape running.

The forward/reverse switching mechanism of the constant speed tape feeding system has been described above, and next, the head chassis moving mechanism will be described. That is, as shown in FIG. 6, a head slider 21 is interposed between the main chassis 1 and the head chassis 3.
This head slider 21 is constructed by a coiled spring 212 being engaged between a bent engagement piece 211 formed on one side thereof and a through hole 3c formed at the end of the head chassis 3. , and is linked to headshield 3. This head chassis moving mechanism moves the head slider 21 in the direction of arrow A in FIG. 6, and at this time, the head chassis 3 is slid in the same direction via the spring 212.

Here, the head slider 21 is slid by a mechanism shown in FIG. That is, a bearing portion 22 is attached to a predetermined position of the main chassis 1, through which the capstan 8 is inserted and rotatably supported. A flywheel 23 and a small-diameter gear 24 are coaxially fitted to the capstan 8. The flywheel 23 is rotated at a constant speed by transmitting the rotational force from the motor 13 via a belt (not shown). A large-diameter gear 25 that can mesh with the gear 24 is rotatably supported on the main chassis 1. As shown in FIG. 8, this gear 25 has two notches 251 and 252 that do not mesh with the gear 24 at two positions corresponding to an opening angle of approximately 90 degrees from the center of rotation.
are formed respectively.

Further, a substantially ring-shaped guide wall 253 is formed on one surface of the gear 25 that does not face the main chassis 1. Most of the guide wall 253 is formed at the same radius from the rotation center of the gear 25, but a curved recess 254 with a small radius is formed in the middle of the guide wall 253 over an opening angle of about 90 degrees from the rotation center. has been done. Further, on one side of the gear 25, a curved control wall 255 with a large diameter is formed at a portion facing the recess 254.

One end of a locking member 26 is located on one side of the gear 25. This lock member 26 is rotatably supported by a shaft 261 formed in the main chassis 1 at a substantially central portion thereof. One end of this locking member 26 is provided with a roller 2 that is engaged with a guide wall 253 of the gear 25.
62 is rotatably supported. The other end of the locking member 26 is connected to a driving piece 271 of the solenoid plunger 27. and,
One end of the locking member 26 has a step portion (see FIG. 7) 2 formed between the shaft 261 and the other end.
The roller 262 is moved around the outer circumference of the guide wall 253 of the gear 25 by a torsion spring 265 whose other end is engaged with a pin 264 that winds around the shaft 261 and projects from the main chassis 1. It is urged to rotate in the direction in which it is pressed, that is, in the clockwise direction in FIG.

On the other hand, the other surface of the gear 25 facing the main chassis 1 is formed with a cam portion 257 having a flat portion 256 in a portion and having a curved portion in the shape shown in the drawing. An engaging piece 21 formed by bending a part of the head slider 21 is provided above the cam portion 257 in FIG.
3 are located facing each other. Here, one end of the drive lever 28 is interposed between the cam portion 257 of the gear 25 and the engagement piece 213 of the head slider 21. This drive lever 28 is connected to a shaft 28 that projects from the main chassis 1 at the other end.
It is rotatably supported by 1. The drive lever 28 also has a coiled spring 284 between a through hole 282 formed at the other end and an engagement piece 283 protruding from the main chassis 1.
By being engaged, it is urged to rotate counterclockwise in FIG. 8.

Therefore, one end of the drive lever 28 is attached to the gear 25.
Pressing one end of the flat part 256 of
The gear 25 is about to be rotated counterclockwise in the figure, but this rotation is prevented by the locking member 2 at one step 258 between the guide wall 253 and the recess 254 of the gear 25.
This is prevented by the contact of the rollers 262 of No. 6. At this time, the gear 25 has its notch 25
1 faces the gear 24, and the flywheel 2
Even if gear 3 is rotating, rotational force is not transmitted to gear 25.

In this state, the PLAY R and PLAY
When either one of the F operators 2c and 2e is touched, the LSI outputs a signal that causes the solenoid plunger 27 to be energized and driven. Then, the drive piece 271 of the solenoid plunger 27 is pulled in the direction of the arrow in FIG. 8, and the locking member 26 is rotated counterclockwise in the figure against the biasing force of the torsion spring 265. Therefore, the roller 262 of the locking member 26 rotates and smoothly separates from the stepped portion 258 of the gear 25. Then, the rotation 25 is rotated counterclockwise in FIG. 8 by the biasing force of the drive lever 28. Therefore, the gear 25 meshes with the gear 24 which is rotating at a constant speed clockwise in the figure.
It is rotated counterclockwise in the figure. Then, one end of the drive lever 28 is pushed up by the curved portion of the cam portion 257, so that the spring 284
It is rotated clockwise in the figure against the urging force of. Therefore, one end of the drive lever 28 comes into contact with the engagement piece 213 of the head slider 21, and moves the head slider 21 upward in the figure. Therefore, as described above, the head chassis 3, which is in an interlocking relationship with the head slider 21, is also slid upward in FIG. 6, and the pre-recording head 4 comes into contact with the tape.

Here, the solenoid plunger 27 is energized and driven during the tape constant speed feeding state as described above, and the gear 25 is rotated about 3/4 counterclockwise in the figure from the state shown in FIG. When the notch 252 reaches the position facing the gear 24 as shown in FIG. It is designed to be close to each other. At this time, one end of the drive lever 28 is pushed up most upward in the figure by the cam part 257, and the one end of the drive lever 28 is flat with the curved part of the cam part 257 as shown in the figure. The spring 28 contacts the contact point with the portion 256.
As a result, the gear 25 is biased counterclockwise in the figure by the biasing force 4, but since the roller 262 of the locking member 26 is in contact with one end of the control wall 255 of the gear 25, the gear 25 is biased counterclockwise in the figure. The rotation of the tape is prevented, and in this state the tape is stably fed at a constant speed.

It is also assumed that the stop operator 2a is touched in the tape constant speed feeding state shown in FIG. Then, the LSI outputs a signal to stop energizing the solenoid plunger 27. Therefore, the lock member 26 is rotated clockwise in FIG. 9 by the biasing force of the torsion spring 265, and as the roller 262 rotates, it is quickly separated from one end of the control wall 255 of the gear 25. and is pressed against the recess 254. Then, since a biasing force is applied to the gear 25 to rotate it counterclockwise in the figure via the drive lever 28 in the state shown in FIG.
5 is rotated counterclockwise in the figure and meshed with the gear 24 again. Then, the gear 25 is rotated counterclockwise in the figure, and the roller 262 of the locking member 26 is rotated.
As shown in FIG. 8 again, the stepped portion 25 of the gear 25
8, the gear 25 is prevented from rotating.

At this time, the drive lever 28 is moved by the spring 284.
Since the head slider 21 and the head chassis 3 are rotated counterclockwise in FIG. 8 by the urging force of , the head slider 21 and the head chassis 3 return to their original positions, and the operation is stopped. Further, in such a stopping operation, the LSI is operated so that the current supply to the solenoid plunger 27 is stopped in response to a detection signal from the tape end detection mechanism and the operation is stopped. Here, when the roller 262 separates from one end of the control wall 255 in the tape constant speed feeding state shown in FIG.
51 meshes with the gear 24, and the rotational penetration of the flywheel 23 suppresses the biasing force of the drive lever 28 of the gear 25 in the counterclockwise direction in the figure. This prevents the roller 262 from hitting the roller 262.

In addition, the PLAY R and PLAY F operators 2
Either one of c or 2e and the REC operator 2d
In the recording state when both are touched, the mechanism is stabilized in the state shown in FIG. 9, the circuit is brought into the recording state, and recording is performed on the tape.

On the other hand, the PLAY R and PLAY F operators 2
In the auto-reverse state in which both the LSIs c and 2e are operated, the LSI first energizes the solenoid plunger 27 in the state shown in FIG. 8, and is brought into the forward or reverse regeneration state as shown in FIG. and,
When this LSI confirms that a detection signal has been output from the tape end detection mechanism, it temporarily stops energizing the solenoid plunger 27, and temporarily moves the head chassis 3 downward in the figure to bring the operation to a halt state as shown in FIG. . Thereafter, the LSI automatically generates a signal to energize the solenoid plunger 27 again, and pushes the head chassis 3 upward in the figure again to the state shown in FIG. 9. The forward and reverse reversals are performed as explained above. That is, the LSI controls the solenoid plunger 27 to temporarily stop energizing the solenoid plunger 27 during forward/reverse reversal, and then start energizing it again.

In addition, the above PLAY R and PLAY F controls 2
In the reciprocating recording state in which both c and 2e and the REC operation element 2d are operated, the recording state is entered only in terms of the circuit, and the mechanical explanation can be made in the same manner as above.

Next, the head moving mechanism 9 will be explained. That is, as shown in FIG. 10, the recording/reproducing head 4 is attached to the head chassis 3 via a head rotation mechanism 9a, which will be described later. On the other hand, the front end of the main chassis 1 has arrows C and D in the figure.
A drive slider 29 is supported so as to be slidable in the direction. A pair of clamping pieces 291 and 292 are protruded from approximately the center of one side of the drive slider 29 . Then, the clamping piece 2 of the drive slider 29
A driven portion 351 of a fan-shaped gear 35 provided in the head rotation mechanism 9a is interposed between 91 and 292, the details of which will be described later.

First, the head rotation mechanism 9a will be explained. FIG. 11a shows the appearance of the head rotation mechanism 9a described here. First, to briefly explain the general configuration and operation, the status recording/reproducing head 4 is for a microcassette tape recorder, and the head section 4 for recording and reproducing signals.
a is provided on one side of the tape contact surface 4b. This recording/playback head 14 is
Similarly, it is arranged in parallel with an erasing head 30 for a microcassette tape recorder, and is fitted into a substantially cylindrical head support 31.

Further, in the figure, reference numeral 32 denotes a head mounting structure, which rotatably supports the head base plate 33 and the gear 34 as shown in the figure. Further, this head mounting structure 32 has a substantially fan-shaped fan gear 35 that meshes with the gear 34 and is rotatably supported at its base.
Further, a head support 31 is attached to the head base plate 33.
is attached.

Here, the head mounting structure 32 is such that its mounting portion 321 is brought into contact with the head chassis 3 and is screwed, for example, with a screw (not shown). The tape contacting surface 4b of the recording/reproducing head 4 faces upward in FIG. 3. Further, from the base of the fan-shaped gear 35, there is a driven portion 35.
1 is extended, and when the head mounting structure 32 is attached to the head chassis 3, the driven part 35
1 is the clamping piece 291, 29 of the drive slider 29
It is something that is interposed between the two. Note that even if the head chassis 3 is moved in the directions of arrows A and B in FIG.
The clamping pieces 291, 2 are always held without coming apart from the gap.
92. Therefore, as described above, when switching the tape from the forward direction to the reverse direction and from the reverse direction to the forward direction, as the drive slider 29 is moved in the directions of arrows C and D, the fan-shaped gear 35 also moves from the base. It will now rotate around the center.

For example, if the fan-shaped gear 35 is rotated in the direction of arrow E in FIG. 11a, the fan-shaped gear 35
The gear 34 meshing with the head is rotated in the direction of arrow F in the figure, and the head base plate 33 and the head support 31 are rotated in the same direction, so that the recording/reproducing head 4 and the erasing head 30 are eventually rotated as shown in FIG. 11b. It will now be rotated exactly 180 degrees. Then, in FIG. 11a, the head portion 4 is
A was facing the track at the bottom in the figure, but after rotation, the head part 4 is facing the track shown in Fig. 11b.
A now faces the upper track of the tape 36 in the figure, and the track change (head movement) of the tape 36 is made here when switching between forward and reverse directions. Also, the fan-shaped gear 3 is moved in the direction of arrow G in FIG.
5 is rotated, the gear 34, head base plate 33, and head support 31 are rotated in the direction of arrow H in the figure, and the recording/reproducing head 4 and erasing head 30 are of course returned to their original positions. It is.

Here, the upper recording/reproducing head 4 and the erasing head 30
When contacting the tape 36 (the tape of the compact tape cassette), the head is inserted into a normal head insertion hole formed in the cassette half and brought into contact with the tape.

Here, a pair of locking portions 331 and 332 are provided on a portion of the head base plate 33 in a protruding manner. Further, on one side of the head mounting structure 32,
A pair of screws 322 and 323 are screwed. As is clear from FIGS. 11a and 11b, the head base plate 33 is rotated until its locking portions 331 and 332 come into contact with the screws 322 and 323, respectively. Therefore, by adjusting the threading depth of the screws 322 and 323, the
The recording/reproducing head 4 and the erasing head 30 in the state shown in FIG.
The azimuth can be adjusted. Also,
The recording/reproducing head 4 and the erasing head 30 are constructed by a head support 31, a head base plate 33, and a head mounting structure 3.
2 is inserted as described later, and then connected to an electric circuit section of a recording/reproducing system (not shown) via a connecting wire 37 that passes through the center of rotation of the gear 34.

Further, on the peripheral side of the head support 31,
Arrows 38, 38 are provided to indicate the direction of tape travel with the head support 31 in the position shown in FIGS. 11a and 11b.

A tape guide portion 311 is formed on one side of the head support 31 to support both ends of the tape 36 in the width direction. Also, Figure 11b
The torsion spring 39 shown in FIG. 11 performs a two-stabilizing action to stably hold the head support 31 in the two positions shown in FIGS. 11a and 11b, and its details will be described later.

Here, FIG. 12 shows details of how the head support 31 and head base plate 33 are attached. That is, through holes 312 and 313 are formed in the head support 31 on both sides of the central portion where the recording/reproducing head 4 and the erasing head 30 are attached, passing through the head support 31 in the vertical direction. Further, the head base plate 33 is rotatably supported by the head mounting structure 32, and a through hole 333 through which the connection wire 37 is inserted is formed at the center of rotation. Screw holes 334 and 335 are formed on both sides of the through hole 333 in portions of the head support 31 facing the through holes 312 and 313, respectively.

With this configuration, the screws 40, 40 are inserted into the through holes 312, 313 from the tape contact surface 4b side of the recording/playback head 4 of the head support 31, and the head base plate 3 is inserted.
The head support 31 and the head base plate 33 are attached by screwing them into the screw holes 334 and 335 of No. 3.

Further, FIG. 13 is an exploded perspective view showing the detailed structure of the above-mentioned head rotation mechanism. First, the head support 31 has a substantially cylindrical shape, and a substantially concave notch 314 is formed from a portion of the head support 31 to a substantially central portion thereof. The recording/reproducing head 4 is fitted into the approximately central portion of the notch 314 with its tape contacting surface 4b slightly protruding. Furthermore, at the end of the notch 314 of the head support 31,
Eraser head 30 is fitted.

On the other hand, the head mounting structure 32 has a through hole 325 extending through the head mounting structure 32 approximately in the center thereof.
is formed. A head base plate 33 and a gear 34 are rotatably supported on the head mounting structure 32 so that the through hole 325 is the center of rotation. Further, a through hole 341 passing through the gear 34 is formed at the center of rotation of the gear 34 . The connection wire 37 is connected to the head base plate 3.
3. Through holes 3 in the head mounting structure 32 and gear 34
33, 325, 241, and when inserted through the respective through holes 333, 325, 341, they are bundled by a substantially cylindrical wire bundle member 41.

Also, a screw 3 screwed into the head mounting structure 32
22 and 323 both pass through flat washers 42 and 42 and coiled springs 43 and 43,
A screw hole 326 formed in the head mounting structure 32,
327 is screwed on. For this reason, each screw 322,
323 is screwed into screw holes 326 and 327 and is held stably without wobbling.

Here, the sector gear 35 has a base 352
A through hole 353 is formed in the through hole 353.
A screw 355 inserted through the substantially cylindrical spacer 354 is screwed into one side of the head mounting structure 32, as shown in FIG. Supported for free movement.
Further, one end of the torsion spring 39 is engaged with an engagement piece 342 protruding from a part of the gear 34, and the other end of the torsion spring 39 is attached to the vicinity of the base 352 of the fan-shaped gear 35. It is engaged with the formed through hole 356.

To explain the above-mentioned bistable action of the torsion spring 39, first, suppose that the sector gear 35 is in the position shown in FIG. 14a.
The biasing force of the torsion spring 39 acts to rotate the fan-shaped gear 35 counterclockwise in the figure and to rotate the gear 34 clockwise in the figure, as shown by the arrow in FIG. However, in this state, the head base plate 33 rotates integrally with the gear 34.
The locking part 331 of the gear 3 comes into contact with the screw 322, and the gear 3
4 is prevented from rotating clockwise in the figure. Therefore, the head support 31 is held in the state shown in FIG. 11a without wobbling, and a stable state can be obtained.

Assume that in a stable state as shown in FIG. 14b, the fan-shaped gear 35 is rotated clockwise in the figure by holding its driven portion 351 against the biasing force of the torsion spring 39. Then, after the both ends of the torsion spring 39 are once brought close to each other, when the fan gear 35 is rotated to the position shown in FIG.
is rotated clockwise in the figure, and a biasing force is applied to rotate the gear 34 counterclockwise in the figure. However, in this state, the locking portion 332 of the head base plate 33, which rotates integrally with the gear 34, is not engaged with the screw 3.
23, the rotation of the gear 34 in the counterclockwise direction in the figure is prevented. Therefore, the head support 31 is held without wobbling in the state shown in FIG. 11b,
One other stable state can be obtained.

Next, the sector gear 35 of the head rotation mechanism 9a is
A mechanism for sliding the drive slider 29 in the directions of arrows C and D in FIG. 10 will be described. That is, FIG. 15 shows the gear 25 viewed from the opposite direction from FIGS. One end is abutted. The control lever 44 is rotatably supported by a shaft 441 protruding from the main chassis 1 at a substantially central portion thereof. The other end of this control lever 44 is provided with the shaft 4.
A pair of engaging protrusions 442, 443 are formed upward in the figure at different distances from 41.
A concave curved portion 444 is formed between each of these engaging protrusions 442 and 443. Further, a bent engagement piece 445 is provided near the shaft 441 of the control lever 44.
is formed, and a coiled spring 447 is engaged between the bent engagement piece 445 and an engagement portion 446 formed on the main chassis 1, so that the control lever 44 is moved clockwise in the figure. energized. Therefore, one end of the control lever 44 is pressed against the cam portion 257 of the gear 25.

Here, a substantially cylindrical drive shaft 45 is provided above the curved portion 444 of the control lever 44 in the drawing so as to be substantially perpendicular to the control lever 44 .
The control lever 44 is connected to the side of the drive shaft 45.
A pair of protrusions 451 and 452, which can be opposed to the engagement protrusions 442 and 443, respectively, are provided to protrude in opposite directions. Further, a drive portion 453 is provided protruding from the side of the drive shaft 45 and extends downward in the figure. The leading end of the driving portion 453 in the extending direction is interposed between a pair of protruding pieces 293 and 294 formed at one end of the driving slider 29.

The protrusions 451, 45 of the drive shaft 45
2 are formed oppositely in the longitudinal direction of the drive shaft 45, as shown in FIG. Furthermore, this drive shaft 45 has a shaft portion 454 having a diameter smaller than that of the drive shaft 45 that protrudes from the right end portion in FIG. 16 and is inserted into the main chassis 1 (not shown in FIG. It is supported so as to be slidable in the longitudinal direction, that is, in the directions of arrows I and J in the figure, and to be rotatable around an axis. This drive shaft 45 is moved by an arrow I in the figure by a spring 455.
In this biased state, the protrusion 452 faces the engagement protrusion 443 of the control lever 44 .

Further, one end portion of a substantially L-shaped switching lever 46 is engaged with the drive portion 453 of the drive shaft 45 so as to be substantially orthogonal thereto. This switching lever 46 is rotatably supported by the main chassis 1 at its corner, and the other end is connected to the solenoid plunger 4.
It is connected to the drive piece 471 of No. 7.

Now, let us assume that the PLAY R and PLAY F operators 2c and 2e are both touched while the auto-reverse is turned on. Then, as mentioned earlier, the gear 25 rotates, and the head chassis 3 is slid upward in FIG. be touched. At this time, at the same time, the control bar 44 is moved counterclockwise in FIG. 17 by the cam portion 257 of the gear 25 against the biasing force of the spring 447 (see FIG. 15), as shown in FIG. Rotated. Then, since the engagement protrusion 443 of the control lever 44 faces the protrusion 452 of the drive shaft 45, the engagement protrusion 443
presses the protrusion 452 and moves the drive shaft 45 to the 17th
Rotate counterclockwise in the figure. Therefore, the drive portion 453 of the drive shaft 45 presses the protruding piece 294 of the drive slider 29 shown in FIG. 16, causing the drive slider 29 to slide in the direction of arrow D in the figure. The fan-shaped gear 35 of the head rotation mechanism 9a is interposed between the clamping pieces 291 and 292 of the drive slider 29.
is rotated as previously shown in Fig. 14b and c,
At this point, the recording/reproducing head 4 is rotated.

For example, suppose that the tape is running in the forward direction in the tape constant speed running state as described above. When the tape reaches the end in this state and a detection signal is output from the tape end detection mechanism, the LSI outputs the following control signal. First, when the tape end detection signal is output, the LSI immediately stops energizing the solenoid plunger 27. As shown in Fig. 8, the time required for the head chassis 3 to be retreated from the playback position to the stop position is set in advance in the LSI, and when that time has elapsed,
The LSI outputs a signal that causes both the solenoid plungers 27 and 47 to be energized and driven. Then, the drive piece 471 of the solenoid plunger 47 is pulled in, and the switching lever 46 moves the drive part 453 of the drive shaft 45 at its one end against the biasing force of the spring 455 to the first position.
6 Press in the direction of arrow J in the figure. At this time, the protrusion 451 of the drive shaft 45 comes to oppose the engagement protrusion 442 of the control lever 44.

When the gear 25 is rotated, the drive lever 28 and the control lever 44 are rotated counterclockwise in the figure by the cam portion 257, as shown in FIG. 18. Then, the engagement protrusion 442 of the control lever 44 presses the protrusion 451 of the drive shaft 45, causing the drive shaft 45 to rotate clockwise in FIG. 18. Therefore, the drive portion 453 of the drive shaft 45 presses the protruding piece 293 of the drive slider 29, causing the drive slider 29 to slide in the direction of arrow C in FIG. Thus, the sector gear 35 of the head rotation mechanism 9a is rotated, and the rotation of the recording/reproducing head 4 is thereby changed.

Furthermore, when the tape reaches the end in the tape reverse playback state as described above, the LSI previously remembers that the tape is in the tape reverse playback state, and when the tape end detection signal is supplied at this time, It is the same as above that the solenoid plunger 27 is temporarily stopped energized and then energized again.
The solenoid plunger 47 is controlled not to be energized. For this reason, the control lever 4
4 is rotated by the cam portion 257, its engagement protrusion 443 comes into contact with the protrusion 452 of the drive shaft 45, and the drive slider 29 moves to the 16th position as described above.
It slides in the direction of arrow D in the figure, and the recording/reproducing head 4 comes to be located on the track facing the forward playback of the tape. That is, the LSI controls the solenoid plunger 47 to be de-energized and energized when the tape end detection signal is supplied while the tape is being fed at a constant speed in the forward and reverse directions.

Here, when the gear 25 rotates, the movement of the head chassis 3 to the playback position and the switching of the rotation of the recording/playback head 4 are performed at the same time, but the two are performed with a slight time lag. is being done. That is, when the gear 25 begins to be driven to rotate, the large diameter portion of the cam portion 257 is moved toward the control lever 4, as is clear from FIG.
The cam shape is set so that the small diameter portion presses the drive lever 28. Therefore, the control lever 44 is first rapidly rotated counterclockwise in FIG. 18, and the rotation of the recording/reproducing head 4 is switched. Then, the gear 25 is further rotated, and the large portion of the cam portion 257 presses the drive lever 28, so that the head chassis 3 is moved to the playback position. Therefore, the recording/playback head 4
After the rotation of the head chassis 3 has been changed,
is moved to the playback position.
Furthermore, the same operation as above can be used when switching from the tape reverse direction to the forward direction.

Therefore, according to the auto-reverse mechanism as described above, first, the roller 262 is used as the locking member 26 for locking the gear 25 at the stop and tape constant speed feeding positions shown in FIGS. 8 and 9. Therefore, the roller 262 is moved to the stepped portion 258 of the gear 25.
It can be smoothly and quickly removed from one end of the control wall 255, and the operation can be ensured. Furthermore, the solenoid plunger 27, which serves as a power source for separating the roller 262 from the stepped portion 258 and one end of the control wall 255, can be a small one that does not require a large amount of electric power, and is suitable for use in a small battery-powered tape recorder. It is.

Further, a drive lever 28 for moving the head chassis 3 from the stop position to the correct position, and a control lever 4 for switching the head rotation mechanism 9a.
4 are driven by the same cam portion 257 of the gear 25, the timing of inserting the recording/playing head 4 into the head insertion hole of the cassette half and the timing of rotating the recording/playing head 4 can be adjusted. In other words, the timing relationship in which the recording/playing head 4 is first rotated and then the recording/playing head 4 is advanced into the cassette half is uniquely determined by the shape of one cam portion 257, and the timing relationship described above is easily determined. It is possible to realize a reliable reversing operation. In this regard, if the above-mentioned timing relationship breaks down, for example, if the recording/playing head 4 rotates within the cassette half, or if the recording/playing head 4 enters the cassette half while rotating, the recording/playing head 4 will not be able to connect to the head of the cassette half. If the tape hits the insertion hole, problems such as damage to the tape, the recording/reproducing head itself, the head rotation mechanism 9a, etc. will occur.

However, if the timing relationship is determined by one cam portion 257 as described above, the above-mentioned timing relationship can be established easily and reliably, and manufacturing is also simple, making it particularly effective for mass production. Become. Further, as shown in FIG. 15, by arranging the drive lever 28 and the control lever 44 so as to face each other with the cam portion 257 in between, the side pressures applied to each drive lever 28 and the control lever 44 can be canceled out. Therefore, the rotational force loss of the gear 25 is reduced, and the gear 25 can be rotated with a light load, so that the motor 13 can be downsized, low power operation can be realized, and it can be used in a small battery-powered tape recorder. This is suitable for this purpose.

Furthermore, in order to slide the drive slider 29 for switching the head rotation mechanism 9a in the directions of arrows C and D in FIG. Since the protrusions 451 and 452 are selectively engaged with the engagement protrusions 442 and 443 of the control lever 44, the drive slider 29 can be moved in different directions by the control lever 44 to which the driving force is applied in the same rotational direction. It can be slid in two directions, has an extremely organic and simple configuration, and can promote downsizing of the tape recorder.

Here, as shown in FIG. 16, the control lever 4
A protrusion 448 is formed at the lower part of the curved portion 444 of No. 4 in the figure. When the notch 251 of the gear 25 faces the gear 24 as shown in FIG. 15, that is, when the tape recorder is in a stopped state, the protrusion 448 is inserted into the drive slider 29 as shown in FIG. engages with one control piece 296 of pinch lever control pieces 295 and 296 (only the pinch lever control piece 296 is shown in FIG. 16), which will be described later, formed on both ends of the drive slider 29, and the drive slider 29 moves in the direction of arrow C in the figure. It is designed to prevent it from sliding.
This prevents damage to the head rotation mechanism 9a due to the drive slider 29 being carelessly slid and the recording/reproducing head 4 being rapidly switched in rotation due to, for example, vibration when carrying the tape recorder or impact from a fall. This is what is being done for. Also,
When switching the rotation of the recording/playback head 4 in auto-reverse mode, the control lever 44 is pressed as shown in FIG.
When the protrusion 448 is rotated counterclockwise in the figure, the protrusion 448 is separated from the pinch lever control piece 296 of the drive slider 29, so that the drive slider 29 can freely slide.

Therefore, a protrusion 448 is formed on the control lever 44 necessary for driving the head rotation mechanism 9a, and this protrusion 448 is brought into contact with the pinch lever control piece 296 of the drive slider 29, so that the head rotation mechanism 9a cannot be stopped. A separate mechanism for fixing the drive slider 29 in this state is not required, and the head rotation mechanism 9a can be easily protected with an efficient and organic structure.

Next, a mechanism for selectively bringing the pinch rollers 5 and 6 into pressure contact with the capstans 7 and 8 will be explained. That is, as shown in FIG. 19, pinch levers 48 and 49 are provided on both sides of the head chassis 3 on the main chassis 1, each rotatably supporting the pinch rollers 5 and 6 at one end thereof. . These pinch levers 48, 49 are
A shaft 4 protruding from the main chassis 1 at the other end
It is rotatably supported by 81,491. The pinch levers 48 and 49 have one end locked on one side 482 and 492, and the other end formed on both sides of the head slider 21 by winding the shafts 481 and 491. curved engagement piece 214,
Torsion springs 483 and 493 respectively engaged with the pinch rollers 215 rotate the pinch rollers 5 and 6 in a direction that presses them against the capstans 7 and 8, respectively. Further, on both sides of the head chassis 3, there are bent pieces 4 that engage the rotating shafts 5a, 6a of the pinch rollers 5, 6 from above in the figure.
84,494 are formed. Furthermore, one side portion 482, 492 of each of the pinch levers 48, 49
Engagement portions 485 and 495 that can be engaged with the pinch lever control pieces 295 and 296 of the drive slider 29, respectively, are formed thereon.

Now, to explain the case where the tape end detection signal is supplied to the LSI in the tape reverse playback state, as mentioned earlier, as shown in FIG. 20, the recording/playback head 4 supports tape reverse playback. In this state, the head chassis 3 is once moved to the rear end and becomes the same state as when it is stopped. In this state, the 20th
Although not shown in the figure, the bent pieces 484, 494 of the head chassis 3 press the rotating shafts 5a, 6a of the pinch rollers 5, 6 downward in the figure, and each pinch lever 48, 49 is moved by the torsion spring 4.
It is rotated clockwise and counterclockwise in the figure against the biasing force of 83,493.

In this state, when the LSI starts energizing the solenoid plunger 27 (see FIG. 8), the drive slider 29 is first slid in the direction of arrow D in the figure, and moves to the position shown by the two-dot chain line in the figure. It will be done. At this time, the head rotation mechanism 9a is switched, and the recording/reproducing head 4 becomes compatible with tape forward playback. After that, head slider 21
(not shown in Figure 20) is moved upward in the figure,
In conjunction with this, the head chassis 3 is moved in the same direction. At this time, in conjunction with the movement of the head slider 21, the torsion springs 483, 493
The pinch levers 48 and 49 are rotated counterclockwise and clockwise in the figure, respectively. Then, the second
As shown in FIG. 1, the pinch lever 48 is regulated to a position where its engaging portion 485 contacts the pinch lever control piece 295 of the drive slider 29 and the pinch roller 5 does not contact the capstan 7. On the other hand, the engaging portion 495 of the pinch lever 49 does not come into contact with the pinch lever control piece 296 of the drive slider 29, and the pinch roller 6 is pressed against the capstan 8 via the tape. And headshashi 3
is moved sufficiently upward in the figure, the recording/playback head 4
is inserted into the cassette half 50 shown by the two-dot chain line in the figure, comes into contact with the tape, and is played back in the forward direction.

Further, the operation when switching from the tape forward playback state to the reverse playback state can also be explained in reverse to the above. In this case, the engaging portion 495 of the pinch lever 49 comes into contact with the pinch lever control piece 296 of the drive slider 29 to prevent the pinch roller 6 from coming into pressure contact with the capstan 8.

Here, during the forward/reverse switching as described above, for example, when switching from the reverse direction to the forward direction, the head chassis 3 may not be lowered sufficiently for some reason, and the recording/playback head 4 may be completely removed from the inside of the cassette half 50. Assume that the drive slider 29 is moved in the direction of arrow D in FIG. 19 without coming out. Then, in the position of the head chassis 3 where the recording/playback head 4 has not completely come out of the cassette half 50,
When the drive slider 29 is slid in the direction of arrow D in the figure, the pinch lever control piece 296 comes into contact with the engaging portion 495 of the pinch lever 49, causing the pinch lever 49 to rotate counterclockwise in the figure. Therefore, the head chassis 3 is forcibly pushed down in the figure through the torsion spring 493 and the head slider 21, and is pressed by the bent piece 484 of the head chassis 3, causing the pinch lever 48 to move clockwise in the figure. It is rotated, and eventually the state shown in FIG. 20 is forcibly shifted. Then, as described above, the forward playback state shown in FIG. 21 is achieved.

Also, when the head chassis 3 is not lowered sufficiently when switching from the forward play state to the reverse play state, the same operation as above is performed on the pinch lever 48, and the head chassis 3 is forcibly lowered. It is something that will make you feel better.

Therefore, if the head chassis 3 does not descend sufficiently for some reason and the recording/playback head 4 is not completely removed from the cassette half 50 as described above, the movement of the drive slider 29 By using force, the head chassis 3 is forcibly lowered via the pinch lever 48 or 49, and the recording/playing head 4 is completely extracted from the cassette half 50 and rotated.
This can prevent damage to the tape, the recording/reproducing head 4 itself, and the head rotation mechanism 9a due to rotation while the tape is inside the cassette half 50. Here, as described above, the head rotation mechanism 9a
In an auto-reverse device equipped with
It is absolutely necessary to prevent the head from rotating while it is inside the cassette half 50, and taking such protection measures for the recording/playback head 4 is the first step.
This is extremely important in connection with ensuring the timing relationship between the rotation of the recording/reproducing head 4 and its entry into the cassette half as explained in FIG.

In addition, when the tape is being played back in the forward direction, the engaging portion 48 of the pinch lever 48 is rotated so that the pinch roller 5 does not come into contact with the capstan 7, as shown in FIG.
5 to the pinch lever control piece 29 of the drive slider 29
It is supported by 5. Conversely, this means that the biasing force of the torsion spring 483 pushes the drive slider 29 in the direction of arrow D in the figure via the pinch lever 48. Therefore, the drive slider 29 is stably locked at the position moved in the direction of arrow D in the figure, that is, at the position corresponding to forward playback of the tape. This also applies to the tape reverse playback state; in this case, the biasing force of the torsion spring 493 moves the drive slider 29 to the 21st position via the pinch lever 49.
By pressing in the direction of arrow C in the figure, the drive slider 29 is stably locked in this position.

Here, as shown again in FIG. 20, tape guides 51 and 52 are provided on both sides of the head rotation mechanism 9a of the head chassis 3. These tape guides 51 and 52 have their own head chassis 3.
Grooves 511 and 521 are provided in the vertical direction in the figure on the surface facing the
is formed. And this groove part 511,5
Pins 512 and 522, which are implanted in the head chassis 3, are loosely fitted into the pins 21, respectively. Further, the lower end portions of the tape guides 51 and 52 in the drawing are rotatably supported by one end portion of the guide levers 513 and 523, respectively. The guide levers 513 and 523 are rotatably supported at their other ends by shafts 514 and 524 implanted in the head chassis 3, respectively. Also,
At the other end of the guide levers 513, 523,
An arm portion 51 that protrudes in a substantially L-shape and whose tip engages with the rotating shafts 5a and 6a of the pinch rollers 5 and 6.
5,525 are formed. Here, the guide levers 513, 523 are connected to the shafts 514, 523 by, for example, torsion springs (not shown).
They are biased to rotate counterclockwise and clockwise in the figure, respectively, with . The guide levers 513 and 523 are rotated counterclockwise and clockwise in the figure until the tips of their arm portions 515 and 525 come into contact with the rotating shafts 5a and 6a of the pinch rollers 5 and 6, respectively. ing.

Here, as shown in FIG. 21, when the tape is played back in the forward direction, both tape guides 51 and 52 are also moved upward in the figure as the head chassis 3 is slid upward in the figure. . At this time, since the rotation of the pinch lever 48 is restricted at the illustrated position, the arm portion 515 of the guide lever 513 is aligned with the rotating shaft 5a of the pinch roller 5 as illustrated.
It is rotated as if to devour it inward. Therefore, the tape guide 51 is pushed upward in the figure along the groove 511 and comes into contact with the tape 53. On the other hand, the pinch lever 49
is moved to a position where it is pressed against the capstan 8, so that the tip of the arm portion 525 of the guide lever 523 remains engaged with the rotating shaft 6a of the pinch roller 6, and the tape guide 52 is prevented from coming into contact with the tape 53. is being done.

In addition, when the tape is played back in the reverse direction, the tape guide 52
When the tape guide 51 comes into contact with the tape 53, the tape guide 51 separates from the tape 53.

That is, in the tape forward playback state, the tape 53 runs rightward in FIG. 21.
At this time, the tape guides 51 and 52 are positioned upstream and downstream of the tape when viewed from the recording/reproducing head 4. Further, in the tape reverse playback state, the tape 53 runs to the left in FIG. 21. At this time, tape guides 51, 52
When viewed from the recording/reproducing head 4, these are positioned downstream and upstream of the tape. Then, when the tape is played in the forward and reverse directions, the tape guide 5
To separate the tape guides 2 and 51 from the tape 53 means to remove the tape guide on the downstream side as viewed from the recording/reproducing head 4 while the tape is being fed at a constant speed.

As described above, by pulling out the tape guides 51 and 52 on the downstream side of the tape when viewed from the recording/reproducing head 4 while the tape is being fed at a constant speed, the tape can be run smoothly and stably. That is, while it is meaningful to provide a tape guide for the tape 53 on the upstream side when viewed from the recording/reproducing head 4 when the tape is being fed at a constant speed, it is also meaningful to provide a tape guide on the tape 53 on the downstream side. has no meaning; rather, the downstream tape guide contacts the tape 53, causing the tape 5
A problem arises in that the smooth and stable running of No. 3 is prevented. In addition, two tape guides 5 are attached to the tape 53.
When the three guides 1 and 52 and the tape guide portion 311 of the head support 31 come into contact with each other, the tape 53 will be forced to run due to the mutual error.

However, as described above, by removing the tape guides 51 and 52 on the downstream side of the tape, the tape 53 can be run smoothly and stably, and
Only two guides, the tape guide 51 or 52 and the tape guide portion 311 of the head support 31, come into contact with the tape 53.
This prevents strain on the vehicle's running.

Here, FIGS. 22 to 24 each show a modification of the mechanism for pulling out the tape guide on the downstream side of the tape. First, in FIG. 22, 54 and 55 are tape guides, and long holes 541, 542 and 551, 552 are formed in the vertical direction in the figure, respectively. And this long hole 541,
Pins 543, 544 and 553, 554 installed in the head chassis 3 (not shown) are loosely fitted into the pins 542, 551, 552, respectively, so that the tape guides 54, 55 are supported so as to be slidable in the vertical direction in the figure. There is. The tape guides 54 and 55 also have locking pieces 545 and 555 protruding from their lower ends in the figure and the head chassis 3.
Coil-shaped springs 547, 557 are engaged between pins 546, 556 protruding from each other, so that they are biased downward in the figure.

Further, the lower end portions of the tape guides 54 and 55 in the drawing are in contact with one end portion of the guide levers 548 and 558. This guide lever 548, 55
8 is rotatably supported at its substantially central portion by shafts 549, 559 protruding from the head chassis 3, and the other end is connected to the pinch lever 4.
8, 49 are opposed to one side portions 482, 492.

In the tape forward direction playback state shown in FIG. It is lowered downward in the figure and does not come into contact with the tape 53. On the other hand, pinch lever 48
is regulated to a position where the pinch roller 5 is not brought into pressure contact with the capstan 7, so that as the head chassis 3 moves upward in the figure, the other end of the guide lever 548 touches one side 4 of the pinch lever 48.
82. For this reason, the guide lever 54
8 is rotated counterclockwise in the figure, and one end thereof pushes the tape guide 54 upward in the figure against the biasing force of the spring 547, so that the tape guide 54 comes into contact with the tape 53. Further, when the tape is being played in the reverse direction, the tape guide 55 comes into contact with the tape 53 and the tape guide 54 moves away from the tape 53, contrary to the above.

Next, in FIG. 23, the tape guide 56,
57, grooves 561 and 571 are formed in the vertical direction in the figure. And these groove portions 561, 571
Pins 562 and 572, which are implanted in the head chassis 3 (not shown), are loosely fitted inside. Further, the lower end portions of the tape guides 56 and 57 in the drawing are rotatably supported by one end portion of the guide levers 563 and 573, respectively. and,
The guide levers 563, 573 have shafts 564, 57 implanted in the head chassis 3 at their other ends.
4, each of which is rotatably supported.
Further, at the other ends of the guide levers 563, 573, arm portions 5 protrude in a substantially L-shape and whose tips engage with the rotating shafts 5a, 6a of the pinch rollers 5, 6.
65,575 are formed. Here, the guide levers 56, 57 have coiled springs 568, 578 between the locking portions 566, 576 protruding from the other end and the locking portions 567, 577 formed on the head chassis 3. By being engaged, they are urged to rotate counterclockwise and clockwise in the figure, respectively, about shafts 564 and 574. The rotation of the guide levers 56 and 57 in the counterclockwise and clockwise directions in the figure is caused by the arm portions 565, 57,
The end portions of the pinch rollers 575 are in contact with the rotating shafts 5a and 6a of the pinch rollers 5 and 6, respectively.

Here, as shown in FIG. 23, when the tape 53 is played back in the forward direction, both tape guides 56 and 57 are also moved upward in the figure as the head chassis 3 is slid upward in the figure. Ru.
At this time, since the rotation of the pinch lever 48 is restricted at the illustrated position, the arm portion 565 of the guide lever 563 is aligned with the rotating shaft of the pinch roller 5 as shown in the figure.
It is rotated so as to bite a inward. Therefore, the tape guide 56 is pushed upward in the figure along the groove 561 and comes into contact with the tape 53. On the other hand, the pinch lever 49
is moved to a position where it is pressed against the capstan 8, so that the tip of the arm 575 of the guide lever 573 remains engaged with the rotating shaft 6a of the pinch roller 6, and the tape guide 57 is prevented from coming into contact with the tape 53. is being done.

In addition, when the tape 53 is played back in the reverse direction, the tape guide 57
When the tape guide 56 comes into contact with the tape 53, the tape guide 56 separates from the tape 53.

Furthermore, in FIG. 24, the tape guide 5
8, 59 have grooves 581, 591 in the vertical direction in the figure.
is formed. And this groove part 581,5
Pins 582 and 592, which are implanted in the head chassis 3 (not shown), are loosely fitted into the pins 91, respectively. Further, the lower end portions of the tape guides 58 and 59 in the drawing are rotatably supported by the tip portions of the pinch levers 48 and 49.

Then, when the tape 53 is played back in the reverse direction, the pinch lever 49 is rotated to the position where the pinch roller 6 is brought into pressure contact with the capstan 8.
In conjunction with this, the tape guide 59 is also pushed upward in the figure, and the tape guide 59 comes into contact with the tape 53. On the other hand, since the pinch lever 48 is restricted to the illustrated position, the tape guide 58 is not pushed upward in the figure and is prevented from coming into contact with the tape 53.

Further, when the tape 53 is in the forward playback state, the tape guide 58 is
3, and the tape guide 59 separates from the tape 53.

Therefore, even with the configuration shown in FIGS. 22 to 24, it is possible to realize a mechanism for removing the tape guide on the downstream side of the tape.

Here, as shown in FIG. 20 again, the head mounting structure 32 of the head rotation mechanism 9a is provided with a torsion spring 60 for bundled wires to hold the connection wires 37 extending from the recording/reproducing head 4. It is being As shown in FIG. 25, this torsion spring 60 has a base 601 wound in a substantially ring shape at its center. And screw 6
02 is the base 601 of the torsion spring 60
The torsion spring 60 rotates around the screw 602 by inserting the screw into the screw hole 603 formed on the opposite side of the head mounting structure 32 to which the head support 31 is attached. Supported for free movement. That is, the screw 602 is loosely fitted into the base 601 and is set so as not to tighten the base 601 while being screwed into the screw hole 603. A bent portion 605 is formed at one end of the torsion spring 60 and is loosely fitted into a recess 604 formed at a position corresponding to the screw hole 603 of the head mounting structure 32. Therefore, the torsion spring 60 is rotatable within the range in which the bent portion 605 can move within the recessed portion 604. Further, at the other end of the torsion spring 60, a substantially ring-shaped hook portion 606 through which the connecting wire 37 is inserted is formed.

The connecting wire 37 is inserted through the hook portion 606 of the torsion spring 60 and then connected to the printed wiring board 61 fixed to the main chassis 1. This printed wiring board 61 is connected to a tape recorder circuit section (not shown) via a connection line 62 that is thicker than the connection line 37 described above. The connecting wire 37 has a sufficient length so that there is no problem even if the head chassis 3 is slid in the directions of arrows A and B in the figure.

Here, the bent portion 605 of the torsion spring 60 is connected to the recessed portion 604 of the head mounting structure 32.
The rotation range of the torsion spring 60 is as follows when the head chassis 3 is moved from the position shown in FIG. 20 to FIG. 21. Connection line 3
7 and the torsion spring 60 is rotated clockwise in FIG. 21, the opening angle of the torsion spring 60 is set within a range that does not change. Therefore, when the head chassis 3 is moved from the stop position to the regeneration position or from the regeneration position to the stop position, the torsion spring 60 simply rotates around the screw 602 within the above rotation range, and its opening angle is designed not to change much.

Therefore, as shown in FIGS. 20 and 21, even if the head chassis 3 moves, the connecting wire 37 is held at approximately the same position, and undesired disconnections can be prevented as much as possible. It is something. Conversely, the connection line 37 is connected to the head chassis 3.
There is no need to apply undesirable lateral pressure or the like to the movement of the cylinder. Further, when the connecting wire 37 is pulled by an external force, the torsion spring 60
The opening angle of the connecting wire 37 changes and the connecting wire 37 can be protected.

In addition, in order to make the connection wire 37 flexible,
Although a thin single wire is used, it is connected to the tape recorder circuit section via a printed wiring board 61 and a thick connecting wire 62 (double wire), which has the advantage of being less susceptible to noise and the like.

Here, as shown in FIG. 26, the torsion spring 60 may be made of a synthetic resin material molded to have elasticity. Also,
Not limited to the torsion spring 60, as shown in FIG. 27, ring parts 631 and 632 are formed at both ends of a coiled spring 63, and a screw 602 is inserted into one ring part 631 to attach the head mounting structure 32. is rotatably supported by the other ring part 6.
The connecting wire 37 may be inserted through the connecting wire 32.

Then, as described above, connect the connecting wire 37 to the head support member (head mounting structure 32) at one end (base 6).
01) is held at the other end of a movably supported elastic member (torsion spring 60, spring 63), which is a feature of this invention.

Next, a description will be given of how to apply back tension to the tape supply reel stand in the tape constant speed feeding state and the tape high speed feeding state. That is,
In FIGS. 28 and 29, the left and right reel stands 10 and 11 (the left reel stand 10 is not shown in FIG. 28) are supported on the back side (top side in FIG. 28) of the main chassis 1. A braking member 64 having a laterally symmetrical shape in FIG. 29 is supported in the portion shown in FIG. 29 so as to be slidable in the directions of arrows K and L in the figure. In this braking member 64, a shaft 642 protruding from the main chassis 1 is loosely inserted into an elongated hole 641 formed approximately in the center thereof, and engagement pieces 643, 644 formed at both ends of the braking member 64 are inserted into the main chassis 1. The long holes 645 and 646 are inserted through the formed long holes 645 and 646 to form the long holes 64 on the front side of the main chassis 1.
By being engaged with the side portions of 5 and 646, it is supported so as to be slidable in the directions of arrows K and L.

The braking member 64 has a torsion spring 65 whose central portion is wound around the shaft 642 and whose both ends are engaged with engagement pieces 647 and 648 formed on both sides of the braking member 64. Therefore, it is normally biased in the direction of arrow L. Here, the movement of the braking member 64 due to the bias in the direction of the arrow L is achieved through the elongated holes 645 and 646 provided at both ends of the braking member 64.
Brakes 661 and 662, which are loosely inserted and protrude from the front side of the main chassis 1, are connected to the left and right reel stands 1.
Braked ring 1 coaxially formed with 0 and 11
It is made to the position where it abuts on 0a and 11a. Therefore, in the stopped state, the left and right reel stands 1
0 and 11 are braked to prevent them from rotating. Also, approximately at the center of the braking member 64 is a protrusion 649 extending downward in FIG.
is formed. The distal end of the protrusion 649 in the extending direction is connected to the engagement piece 213 of the head slider 21.
is facing.

In this state, when the tape is fed at a constant speed, the head slider 21 moves to the 29th position as described above.
It is driven upward in the figure. Therefore, the engagement piece 213 of the head slider 21 is connected to the protrusion 64 of the braking member 64.
9 and slide the braking member 64 in the direction of arrow K against the biasing force of the torsion spring 65, as shown in FIG. Then, brake 6
61 and 662 are separated from the braked rings 10a and 11a of the left and right reel stands 10 and 11, and stable constant speed tape feeding is achieved. At this time, the left or right reel stand 10, 11 which is the tape supply side
When rotatably supported by the main chassis 1, it is supported with a light frictional force, and this frictional force provides back tension.

On the other hand, when the tape is fed at high speed, the head slider 21 is not moved and the rotational force of the motor 13 is applied to the left or right reel stand 10, 1 in the state shown in FIG.
1, and the tape is fed at high speed. Therefore, when feeding the tape at high speed,
Both reel stands 10 and 11 are braked rings 10
The brake elements 661 and 662 are rotated while being pressed against the brake elements a and 11a. That is, when the tape is fed at high speed, a larger back tension is applied than when the tape is fed at a constant speed, and for example, when tape running is stopped, tape sag may occur due to the rotational penetration of the reel stands 10 and 11. It is something that can be prevented. Also, when feeding the tape at high speed, the reel stands 10, 11
Since the driving torque to rotate the brake is large, the brake
Even if the brake rings 61 and 662 are brought into pressure contact with the braked rings 10a and 11a, there is no problem in tape running.

Therefore, the back tension can be switched with a simple configuration between when the tape is being fed at a constant speed and when the tape is being fed at a high speed.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

Effects of the invention Therefore, as detailed above, according to this invention, a wire extended from an object such as a head whose position changes between a stopped state and a regenerated state can be easily constructed and prevented from breaking. It is possible to provide an extremely good tape recorder wire bundle mechanism that can securely hold the tape recorder.

[Brief explanation of the drawing]

Figures 1 and 2 are a front perspective view and a rear perspective view, respectively, showing a cassette tape recorder to which this invention is applied, and Figure 3 is a configuration diagram showing a mechanism for switching between forward and reverse tape running in the cassette tape recorder. , FIGS. 4 and 5 are explanatory diagrams of the operation of the forward/reverse switching mechanism, FIGS. 6 and 7 are a plan view and a perspective view of the head chassis moving mechanism of the forward/reverse switching mechanism, and FIG. 8 is an illustration of the operation of the forward/reverse switching mechanism. 10 and 11a and 11b are perspective views showing the head rotation mechanism of the forward/reverse switching mechanism, respectively.
13 are exploded perspective views showing the detailed structure of the head rotation mechanism, and FIGS. 14a to 14c are block diagrams and operation explanations showing the structure and operation of the torsion spring used in the head rotation mechanism, respectively. 15 and 16 are respectively a plan view and a perspective view showing the drive mechanism that drives the head rotation mechanism, FIGS. 17 and 18 are explanatory diagrams of the operation of the drive mechanism, and FIG. 19 is a pinch FIG. 20 is a plan view showing the control mechanism of the lever, and illustrates the operation of the control mechanism of the pinch lever, and also shows the configuration of an embodiment of the control mechanism of the tape guide and the wire bundle mechanism of the tape recorder according to this invention. A plan view and FIG. 21 are explanatory diagrams of the pinch lever and tape guide control mechanisms and the operation of the same embodiment, and FIGS. 22 to 24 are plan views and FIG. 25 is a perspective view showing the bundled wire mechanism in detail, FIGS. 26 and 27 are perspective views showing modified examples of the bundled wire mechanism, and FIG. 28 is a perspective view showing a modification of the bundled wire mechanism.
29 are a perspective view and a plan view showing the back tension mechanism, respectively, and FIG. 30 is an explanatory diagram of the operation of the same back tension mechanism. 1...Main chassis, 2...Operation unit, 3...
Head chassis, 4...Recording/playback head, 5, 6...
Pinch roller, 7, 8... Capstan, 9...
Head moving mechanism, 10...Left reel stand, 11...
Right reel stand, 12... Tape counter, 13...
Motor, 14, 15... Operation lever, 16... Left playback slider, 17... Right playback slider, 18...
...Reverse drive lever, 19...Gear, 20...
Lock lever, 21...Head slider, 22...
... Bearing part, 23 ... Flywheel, 24, 25
... Gear, 26 ... Lock member, 27 ... Solenoid plunger, 28 ... Drive lever, 29 ...
Drive slider, 30... Erasing head, 31... Head support, 32... Head mounting structure, 33...
Head base plate, 34...gear, 35...fan-shaped gear,
36... Tape, 37... Connection wire, 38... Arrow, 39... Torsion spring, 40... Screw, 41... Wire bundle member, 42... Flat washer,
43... Spring, 44... Control lever, 45
... Drive shaft, 46 ... Switching lever, 47 ... Solenoid plunger, 48, 49 ... Pinch lever, 50 ... Cassette half, 51, 52 ... Tape guide, 53 ... Tape, 54 to 59 ...
Tape guide, 60...Torsion spring,
61...Printed wiring board, 62...Connection line, 63...
Spring, 64... Braking member, 65... Torsion spring, 661, 662... Brake element.

Claims (1)

[Scope of utility model registration request] In a tape recorder in which a head is brought into contact with and separated from the tape in a tape constant speed running state, a tape high speed running state, and a stopped state, a connecting line extending from the head is movably supported at one end by a supporting member of the head. 1. A wire bundle device for a tape recorder, characterized in that the wire bundle is held at the other end of an elastic member.