JPH0150982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape running stop detection mechanism for a tape recorder, and relates to a mechanism that enables more stable and reliable operation.

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 or play for long periods of time. This is particularly useful when regeneration is required.

However, such auto-reversing devices are still in the early stages of development and have various points to be improved. However, there is a strong demand for the development of a tape recorder having an auto-reverse device that is economically advantageous and can operate reliably.

The present invention has been made based on the above circumstances, and is capable of stably and reliably detecting tape running stop with a simple configuration, and is an extremely good tape recorder tape suitable for use in a tape recorder having an auto-reverse mechanism. The purpose of the present invention is to provide a running stoppage detection mechanism.

Before explaining one embodiment of the present invention, the basic configuration of an auto-reverse device explained in this embodiment will be explained below.

That is, in FIG. 1, reference numeral 1 denotes a generally box-shaped main chassis of a compact cassette 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. The operation section 2 is provided to protrude forward from the lower end of the main chassis 1 in FIG.
REW operator 2b for rewinding, reverse direction (return operation)
PLAY(R) controller 2c for playback, REC for recording
Controller 2d, PLAY (F) for forward direction (forward motion) playback
Operator 2e, FF operator 2f for fast forwarding, and PAUSE operator 2g for pause (pause), each can be pressed and operated in the direction of arrow (A) in a piano touch style, and return in the direction of arrow (B). These operators 2a to 2g are freely arranged, and each of these operators 2a to 2g can put each drive system into a driving state via an operation lever (not shown). In this case, each of the above-mentioned operating levers is located at the first
It is arranged so as to be able to reciprocate and slide vertically in the figure on the back side in the figure, and is engaged with a known locking mechanism (not shown) to be locked in the pushed-in state by a pressing operation. However, the above STOP control 2
The operation lever a is not locked, but engages with the locking mechanism so as to release the operation levers of the other operators that are in the locked state. Also, above
The operating lever of the PAUSE operator 2g operates independently without any engagement with the locking mechanism, and is located at the first lever of the bottom flat portion 1a of the main chassis 1.
It engages with a push mechanism (not shown) located on the back side of the figure, and is locked in the pressed state with the first pressing operation, for example, temporarily stopping the playback state, and is locked with the second pressing operation. It functions so that the state is canceled and the state is returned to, for example, a playback state.

Each operating lever of the REW and FF operating elements 2b and 2f functions to selectively drive a forward/reverse switching mechanism of a high-speed feed system (not shown) to cause the tape to run at high speed in the forward or reverse direction. In addition, each of the PRAY(R) and PRAY(F) operating levers 2c and 2e selectively drives a forward/reverse switching mechanism of a constant speed feed system, which will be described later, to move the tape at a constant speed in the forward or reverse direction. At the same time as moving, arrow C in Fig. 1,
The head slider 13, which can be slid back and forth in the D direction, is driven to bring the recording/reproducing head 4, etc. mounted on the head slider 13 into contact with a predetermined surface of the tape, and the same pair of pinch rollers 5 and 6 are selected. By bringing it into contact with the pair of capstans 7 and 8, it functions to be in a playback state in the forward or reverse direction. 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 tracks the corresponding tracks of the tape according to the tape running direction. The configuration and operation of this head moving mechanism 9 will be described in detail later.

By the way, if it is a normal tape recorder, it only needs to be able to play (record) in the forward direction, so of course one
The PLAY control may be used, but since the tape recorder that is used here that enables auto-reverse requires playback (recording) in both forward and reverse directions, two independent controls for forward and reverse directions are required.
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, and if both are operated at the same time, so-called auto-reverse is possible, and normal playback (recording) is possible. In this case, you only need to operate the PLAY operator in the forward direction.

In addition, the REC operator 2d in the center of the illustration is
When operated in combination with the PLAY operator, the operating lever drives the recording system so that recording can be performed in only one direction, forward or reverse, or back and forth by auto-reverse.

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 14 for an auto-reverse number limiting mechanism and a manual reverse mechanism.
15 are installed. A cassette lid lock slider 16, which is elongated in the vertical direction, is supported on the left side of the bottom plane portion 1a of the main chassis 1 so as to be slidable in the longitudinal direction. This cassette lid lock slider 16 is connected to the STOP operator 2a.
It slides in conjunction with the operation of , and opens the cassette lid (not shown). For example, when the STOP operator 2a is operated in the playback state, it is simply stopped, and in the stopped state, the STOP operator 2a is opened. 2
It functions to perform a so-called double eject operation in which an eject operation is performed when a is operated.

Next, FIG. 2 shows a state in which FIG. 1 is viewed from the back side of the main chassis 1. That is,
A plurality of columnar bodies 17, . . . , 17 are protruded from the bottom-like flat portion 1a of the main chassis 1, and a sub-chassis 18 is attached to the tip of the columnar bodies in the protruding direction so as to be substantially parallel to the bottom-like flat portion 1a. . and,
This sub-chassis 18 includes a pair of flywheels 19 whose axes are the capstans 7 and 8;
Twenty bearings 211, 212 are provided.

Further, the bottom-like flat surface portion 1a of the main chassis 1
and the sub-chassis 18, there is a tape running drive mechanism 22 as shown in FIG.
REC lock mechanism 23 and automatic stop mechanism (hereinafter
24 mag. called ASO mechanism) are installed on each.

Here, FIG. 4 shows the forward/reverse switching mechanism of the constant speed tape feeding system taken out from FIGS. 1 to 3 above. That is, what is indicated by a dotted line in the figure is the head slider 3, which is shown in a simplified manner from that shown in FIG. 1 for the sake of simplicity.
This head slider 3 has a pair of protrusions 3a and 3b formed at predetermined positions on both sides thereof. Then, each protrusion 3a, 3b of the head slider 3
The left and right playback sliders 25 and 26 shown by two-dot chain lines in the figure are arranged in parallel on the lower surface of the head slider 3.
The through holes 251 and 261 formed in the center of each can be engaged with engagement pieces 252 and 262 formed at the lower part in the figure. Here, the left and right playback sliders 25 and 26 have guide pins 25 formed in the main chassis 1 inserted into a pair of elongated holes 253 and 254 and 263 and 264 respectively formed therein.
5, 256 and 265, 266, respectively, so that they are supported so as to be able to reciprocate and slide in the directions of arrows C and D in the figure, similarly to the head slider 3.

And the left and right playback sliders 25 and 26
are the PLAY(R) and PLAY(F) operators 2c,
2e is interlocked with each operating lever via a spring (not shown), and the PLAY(R)
When the and PLAY (F) operators 2c and 2e are operated, they are biased in the direction of arrow C in the figure. In addition, the left and right playback sliders 25 and 26
The rotation of the pinch rollers 5, 6 and the motor 13 is controlled by the left and right reel stands 10, 1, respectively.
It controls an idler, gears, etc. (not shown) for transmitting signals to the 1 and 1, respectively. That is, when the left playback slider 25 is slid in the direction of arrow C in the figure, the pinch roller 5 is moved to the capstan 7.
(See FIG. 1), the left reel stand 10 is rotated to wind the tape, and playback is performed by running the tape in the reverse direction. In addition, the right playback slider 26 is located at the arrow C in the figure.
When the pinch roller 6 is slid in the direction
is brought into pressure contact with the capstan 8 (see FIG. 1), and the right reel stand 11 is rotationally driven to wind up the tape, thereby performing playback in which the tape runs in the forward direction. That is, whether the tape runs in the forward direction or in the reverse direction is determined by which of the right and left reproduction sliders 26 and 25 is moved in the direction of arrow C in FIG.

Here, a locking portion 257 having a tape is formed on the upper right side of the left playback slider 25 in the figure. Further, a locking portion 267 formed by a substantially concave notch is formed at the substantially central portion of the upper end of the right playback slider 26 in the figure. A substantially T-shaped reverse drive lever 27 rotatably supported by a shaft 1b protruding from the main chassis 1 is provided on the lower surfaces of the left and right reproduction sliders 25, 26. On the left side of the base 271 of the reverse drive lever 27 is the left playback slider 2.
A bent engagement piece 272 that engages with the locking portion 257 of No. 5 is formed. In addition, the reverse drive lever 27
On the right side of the base 271 in the figure, there is a bent engagement piece 27 that engages with the locking part 267 of the right playback slider 26.
3 is formed. Furthermore, a substantially crank-shaped elongated hole 274 is formed on the left side of the base 271 of the reverse drive lever 27 in the drawing.

The elongated hole 2 of the reverse drive lever 27
Inside 74 is a shaft 1 protruding from the main chassis 1.
A protrusion 281 protruding from one side of the gear 28 rotatably supported by the gear 28 is fitted. Therefore, when the gear 28 rotates, the reverse drive lever 27 can swing around the shaft 1b in accordance with the rotation. Here, on the other side of the gear 28 opposite to the side on which the protrusion 281 is provided, there is provided a lock lever 2, which will be described later, for rotation of the gear 28 clockwise in the figure.
A pair of locking parts 282, 283 that bite into 9
is formed. These locking parts 282, 283
are formed at opposing positions with the axis 1c as the center. In addition, the lock lever 29
is rotatably supported by a shaft 1d protruding from the main chassis 1, and the gear 28
An engaging piece 291 is formed that can be selectively engaged with and detached from the engaging parts 282 and 283. The lock lever 29 is normally biased by the action of a spring (not shown) in a direction in which its engaging portion 291 engages with the locking portions 282, 283 of the gear 28, that is, counterclockwise in the figure. Further, this lock lever 29 is used when detecting the end of the tape at the time of switching the reciprocating operation described above (this may be the same as detecting the end of the tape in the ASO mechanism) or when operating the operating lever 15 of the manual reverse mechanism (see FIG. 1).
The engaging portion 291 is disengaged from the locking portions 282, 283 of the gear 28 by being rotated clockwise in FIG. 4 against the biasing force of the spring.

On the other hand, a first gear (not shown) is always meshed with the gear 28. This first gear and gear 2
The gear ratio with 8 is set at 1:2, and when the first gear rotates once, the gear 28 rotates 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 direction. When the second gear is meshed with the first gear, it is rotated to rotate the gear 28 clockwise in the figure.

In the above configuration, assuming auto-reverse, the PLAY(R) and PLAY(F)
Assume that both the operators 2c and 2e are operated. Then, this PLAY(R) and PLAY(F) operator 2c,
2e, the left and right playback sliders 25 and 26 are both moved to the fourth
It is slid in the direction of arrow C in the figure. Here, as shown in FIG. 4, the engaging portion 2 of the lock lever 29
91 is engaged with the locking portion 283 of the gear 28, the position of the protrusion 281 restricts the reverse drive lever 27 to the illustrated position. Therefore, the right playback slider 26 is moved sufficiently in the direction of arrow C, but the locking portion 257 of the left playback slider 25 comes into contact with the bent engagement piece 272 of the reverse drive lever 27, and the left playback slider 25 is moved sufficiently in the direction of arrow C. not moved in the direction. Therefore, the pinch roller 6, idler, etc. controlled by the right playback slider 26 are pressed against the capstan 8 or moved to a predetermined position for rotating the right reel stand 11, and are rotated in the forward direction. The regeneration is performed. At this time, as the right playback slider 26 moves in the direction of arrow C, its engagement piece 262 comes into contact with the protrusion 3b of the head slider 3, and the head slider 3
move in the direction of arrow C. For this reason, a recording/reproducing head 4 (see FIG. 1), the details of which will be described later, provided on the head slider 3 is brought into contact with the tape. Also, at this time, since the reverse drive lever 27 is holding down the left playback slider 25 being biased in the direction of arrow C, a rotational biasing force is applied to the reverse drive lever 27 in the clockwise direction in the figure. This means that the For this reason, the protrusion 281 fitted into the elongated hole 274 of the reverse drive lever 27
The gear 28 having a clockwise rotation force is also applied to it in the figure, but since its locking portion 283 is engaged with the engaging portion 291 of the lock lever 29, the gear 28 does not rotate. The reverse drive lever 27 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. 5, the tape end detection mechanism described above detects
The lock lever 29 is rotated clockwise in the figure, and its engaging portion 291 is disengaged from the locking portion 283 of the gear 28. At this time, as mentioned earlier, in the state shown in FIG. 4, the gear 28 is given a rotation biasing force in the clockwise direction in the figure, so the gear 28 is slightly rotated in the clockwise direction in FIG. . Then, this gear 2
The first gear meshed with gear 8 is slightly rotated in the opposite direction to gear 28. Therefore, the first gear and the second gear are brought into meshing state, and the gear 28 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 28 rotates exactly half a turn and the locking portion 282 is the engaging portion 291 of the lock lever 29
is locked. At this time, the reverse drive lever 27 is rotated clockwise in FIG. 6, following the protrusion 281 as the gear 28 rotates half a turn. Therefore, the bent engagement piece 2 of the reverse drive lever 27
73 comes into contact with the locking portion 267 of the right playback slider 26, and the right playback slider 26 is moved backward in the direction of arrow D in the figure. On the other hand, the left playback slider 25 has a reverse drive lever 2 relative to its locking portion 257.
Since the locking of the bent engagement piece 272 of No. 7 is released,
It is moved sufficiently in the direction of arrow C. Therefore, the pinch roller 5, idler, etc. controlled by the left reproducing slider 25 are pressed against the capstan 7 or moved to a predetermined position for rotating the left reel stand 10, and are then moved in the opposite direction. The regeneration is performed. At this time, the left playback slider 25
As the engaging piece 252 moves in the direction of arrow C, the engaging piece 252
comes into contact with the protrusion 3a of the head slider 3, and moves the head slider 3 in the direction of arrow C. For this reason, the recording/reproducing head 4 provided on the head slider 3
is brought into contact with the tape.

Here, the head slider 3 is moved once backward in the direction of arrow D 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) by a mechanism to be described later. then press the left or right playback slider 25
or 26 is moved in the direction of arrow C, it is moved in the same direction.

In addition, in the state shown in FIG. 6, the reverse drive lever 27 is pressing down on the right playback slider 26 being biased in the direction of arrow C, so that the reverse drive lever 27 is biased in the counterclockwise direction in the figure. This means that a rotational biasing force is applied. For this reason, the gear 28 is given a rotation biasing force in the clockwise direction in the figure, but since its locking portion 282 is engaged with the engaging portion 291 of the lock lever 29, the gear 28 is prevented from rotating. Zu reverse drive lever 27
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 29 as described above.
is rotated clockwise in the figure, the gear 28 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 for tape running has been described above. Next, the head moving mechanism 9 (see FIG. 1) will be described. That is, as shown in FIG. 4 again, a bent engagement piece 276 is formed at the tip of the extending portion 275 of the reverse drive lever 27, which is formed in a substantially T-shape. In addition, the long holes 254, 264 of the left and right playback sliders 25, 26
The guide pins 256 and 266 inserted therein are elongated holes formed at both ends of the control slider 30 and the drive slider 31 that overlap each other between the left and right playback sliders 25 and 26 and the main chassis 1. 301, 302 and 311, 31
2 are inserted through each. The control slider 30 and the drive slider 31 are moved independently in a direction substantially orthogonal to the sliding direction of the left and right playback sliders 25 and 26, that is, in the direction indicated by the arrow E in the figure.
It is supported so that it can freely slide back and forth in the F direction.

Here, a through hole 303 having the shape shown in the figure is formed approximately at the center of the control slider 30. A substantially concave fitting part 304 is formed in the lower part of the through hole 303 in the drawing, into which a driven part of a fan-shaped gear provided in a head rotation mechanism, which will be described later, is fitted. A pair of locking portions 305 and 306 are formed on the right side of the fitting portion 304 in the through hole 303 at a predetermined interval in the longitudinal direction of the control slider 30.

On the other hand, approximately at the center of the drive slider 31, there is a
A through hole 313 having the shape shown is formed. A substantially mountain-shaped protrusion 314 having tapers on both sides is formed at the upper part of the through hole 313 in the drawing. and,
This protrusion 314 is adapted to engage with a pin 3c implanted in the lower part of the head slider 3 in the figure. Further, on the right side of the protrusion 314 of the through hole 313 in the figure, a pair of locking portions 31 are provided at a predetermined interval in the longitudinal direction of the drive slider 31.
5,316 are formed. A bent engagement piece 276 formed on the extending portion 275 of the reverse drive lever 27 is interposed between the pair of locking portions 315 and 316.

Further, a bent engagement piece 317 is formed at the lower part of the through hole 313 in the drawing to be interposed between the locking portions 305 and 306 of the control slider 30.

If the tape is currently being played in the forward direction, the reverse drive lever 27 is in the position shown in FIG.
comes into contact with the locking portion 316 of the drive slider 31, and moves the drive slider 31 in the direction of arrow F in the figure. Furthermore, the bent engagement piece 317 of the drive slider 31
comes into contact with the locking portion 306 of the control slider 30, and the control slider 30 is also moved in the direction of arrow F in the figure.

When the regeneration state in the forward direction is switched to the regeneration state in the reverse direction as described above, the reverse drive lever 27 is rotated clockwise in the figure as shown in FIG. The engagement piece 276 contacts the locking portion 315 of the drive slider 31 and moves the drive slider 31 in the direction of arrow E. At this time, the bent engagement piece 317 of the drive slider 31 is only moving between the locking portions 305 and 306 of the control slider 30, and the control slider 30 does not move. Further, as the drive slider 31 is moved in the direction of the arrow E in the figure, the pin 3c of the head slider 3 is moved downward in the figure along the taper of the protrusion 314. The slider 3 is moved backward in the direction of arrow D in the figure.

When the switching to the reverse reproduction state is completed, the drive slider 31 is sufficiently moved in the direction of arrow E in the figure, as shown in FIG. At this time,
The pin 3c of the head slider 3 is connected to the drive slider 3.
It is located on the opposite side of FIG. 4 beyond the apex of the protrusion 314 of No. 1. At the same time, at this time, the left playback slider 2
5 is sufficiently moved in the direction of arrow C in the figure, the head slider 3 having the protrusion 3a that engages with the engaging piece 252 is also moved in the same direction. Therefore, the pin 3c of the head slider 3 is connected to the drive slider 31.
The protrusion 314 of the reverse drive lever 27 is pressed in the opposite direction, thereby causing the drive slider 31 to press the locking part 315 more than the bent engagement piece 276 of the reverse drive lever 27.
It is moved sufficiently in the direction of arrow E in the figure.
Further, the control slider 30 is also moved in the direction of arrow E following the movement of the drive slider 31.

On the other hand, when switching from the reverse playback state to the forward playback state, the reverse drive lever 2
7 is rotated in the counterclockwise direction in FIG. The control slider 30 is moved in the direction of arrow F, and the state shown in FIG. 4 is again achieved. It goes without saying that even during this switching, the head slider 3 once retreats in the direction of arrow D and then moves forward again.

Here, during switching from the forward direction to the reverse direction and from the reverse direction to the forward direction, the driving slider 31 and the control slider 30 are moved in the directions of arrows E and F in the figure, respectively, by driving the head rotation mechanism described below. It is necessary to make
The head rotation mechanism will be explained below. Figure 7a
1 shows the appearance of the head rotation mechanism described here. First, to briefly explain the general structure and operation, the recording/reproducing head 4 is for a microcassette tape recorder, and its signal recording/reproducing head section 4a is offset to one side of the tape contact surface 4b. It is provided. The recording/reproducing head 4 is arranged in parallel with an erasing head 32 for a microcassette tape recorder, and is fitted into a substantially cylindrical head support 33.

Further, in the figure, reference numeral 34 denotes a head mounting structure, which rotatably supports a head base plate 35 and a gear 36 as shown in the figure. Furthermore, a substantially fan-shaped fan gear 37 that meshes with the gear 36 is rotatably supported on the head mounting structure 34 at its base.
Further, a head support 33 is provided on the head base plate 35.
is attached.

Here, the head mounting structure 34 is such that its mounting portion 341 is brought into contact with the head slider 3 and screwed, for example, with a screw (not shown). In this state, the tape abutting surface 4b of the recording/reproducing head 4 faces upward in FIG. Further, from the base of the fan-shaped gear 37, the driven portion 37
1 is extended, and when the head mounting structure 34 is attached to the head slider 3, the driven part 37
1 is interposed within the fitting portion 304 of the control slider 30. Note that even if the head slider 3 is moved in the directions of arrows C and D in FIG. . Therefore, as mentioned earlier, when switching the tape from the forward direction to the reverse direction and from the reverse direction to the forward direction,
As the control slider 30 is moved in the directions of arrows E and F, the sector gear 37 is also rotated about the base.

For example, if the fan-shaped gear 37 is rotated in the direction of arrow G in FIG. 7a, the gear 36 meshing with the fan-shaped gear 37 is rotated in the direction of arrow H in the figure.
The head base plate 35 and the head support 33 are rotated in the same direction, so that the recording/reproducing head 4 and the erasing head 32 are rotated exactly 180 degrees as shown in FIG. 7b. Then, whereas in FIG. 7a, the head portion 4a was facing the lower track in the figure with respect to the tape 38 indicated by the two-dot chain line in the figure, after rotation it is as shown in FIG. 7b. The head portion 4a is attached to the tape 3.
It will now be facing the upper truck in the figure 8.
Here, the track of the tape 38 is changed (head movement) when switching between forward and reverse directions. Further, when the fan-shaped gear 37 is rotated in the direction of the arrow ( ) in FIG. Of course, the erase head 32 is returned to its original position.

Here, the upper recording/reproducing head 4 and the erasing head 32
When contacting the tape 38 (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 351 and 352 are provided on a portion of the head base plate 35 in a protruding manner. Further, on one side of the head mounting structure 34,
A pair of screws 342 and 343 are screwed. As is clear from FIGS. 7a and 7b, the head base plate 35 is rotated until its locking portions 351 and 352 come into contact with the screws 342 and 343, respectively. Therefore, by adjusting the threading depth of the screws 342 and 343, the azimuth adjustment of the recording/reproducing head 4 and erasing head 32 in the states shown in FIGS. 7a and 7b can be performed. The upper recording/reproducing head 4 and the erasing head 32 also include a head support 33, a head base plate 35, and a head mounting structure 34.
As will be described later, the connecting wire 39 is inserted through the center of rotation of the gear 36, and then connected to an electric circuit section of a recording/reproducing system (not shown).

Further, on the peripheral side of the head support 33,
Arrows 40, 40 are provided to indicate the direction of tape travel with the head support 33 in the position shown in FIGS. 7a and 7b.

A tape guide portion 331 is formed on one side of the head support 33 to support both ends of the tape 38 in the width direction. The torsion spring 41 shown in FIG. 7b performs a two-stabilizing action to stably hold the head support 33 in the two positions shown in FIGS. 7a and 7b.

In a tape recorder having an auto-reverse device having the basic structure as described above, the detailed structure of each part thereof will be explained below. First, FIG. 8 shows the PLAY(R) and PLAY(F) operators 2c,
2e shows the operating levers 42 and 43.
That is, the PLAY (R) and PLAY (F) operating levers 42 and 43 are configured to be able to slide vertically in the figure in conjunction with the operation of the PLAY (R) and PLAY (F) operators 2c and 2e. , are supported by the bottom flat portion 1a of the main chassis 1, and are interlocked with the left and right playback sliders 25 and 26 via springs (not shown), respectively.
Then, first and second
Lock plates 44 and 45 are arranged in parallel. The first and second lock plates 44, 45 are supported by the bottom flat portion 1a of the main chassis 1 so that they can both be slid independently in the longitudinal direction. In addition,
In FIG. 8, the front side in the figure is the first lock plate 4.
4, the second lock plate 45 is on the back side in the figure.

The first lock plate 44 is always urged rightward in the figure by a spring (not shown). Further, the second lock plate 45 is also biased toward the right in the figure by another spring (not shown). When the second lock plate 45 is moved to the left in the figure, the first lock plate 44 is moved in the same direction.

Here, a bent engagement piece 441 is formed at a predetermined position on the upper side of the first lock plate 44 in the drawing. This bent engagement piece 441 is a locking portion 4 formed at one end of a through hole 431 formed slightly below the center of the PLAY (F) operation lever 43 in the figure.
32. That is, this locking portion 432 has a tapered portion 433 that provides relief from the bending engagement piece 441 when the PLAY(F) operating lever 43 is moved upward in the drawing, and a tapered portion 433 of the PLAY(F) operating lever 43. It consists of a locking portion 434 that bites in against downward movement in the figure. Therefore, when pressing the PLAY(F) operator 2e,
The PLAY(F) operating lever 43 slides upward in the figure, and the tapered portion 433 of the lock portion 432 moves to the first position.
Since the bent engagement piece 441 of the first lock plate 44 is pressed, the first lock plate 44 is slid to the left in the figure. Then, the locking portion 434 of the locking portion 432 of the PLAY(F) operation lever 43 is connected to the first locking plate 43.
When the first lock plate 44 reaches the position facing the bent engagement piece 441 of the lock part 432, as shown in FIG. 434 is a bent engagement piece 441
This is where the PLAY (F) operating lever 43 is locked in its operating position.

Here, the first lock plate 43 is
(F) Only locks the operating lever 43.
The other operating levers of the REW operating element 2b and the FF operating element 2f are each locked in the operating position by a second locking plate 45 using the same means as described above.

Further, when the STOP operator 2a is operated, the second lock plate 45 is slid to the left in the figure, and based on this, the PLAY (F) operation lever 4
3. Each of the operating levers of the REW operator 2b and the FF operator 2f can be released from the lock position. Furthermore, when the ASO mechanism 24 is operated, which will be described later, the second lock plate 44 is slid to the left in the figure to release the lock.

Here, the PLAY(R) operating lever 42 is
The lock member 46 is not locked by the first and second lock plates 44 and 45, as shown in FIG.
It is designed to be locked in the operating position by the. The reason for this is the PLAY(R) and PLAY
(F) When operating the operating lever 14 of the auto-reverse frequency limiting mechanism in the auto-reverse state obtained by operating the operators 2c and 2e together to set the reciprocating playback state, the tape is first played back in the forward direction. When the terminal reaches the end, the second
The lock plate 45 is slid and the PLAY (F) operating lever 43 is unlocked. At this time, as the second lock plate 45 slides, the first lock plate 44 is also slid in the same direction.
(R) Assuming that the operating lever 42 is locked to the first or second lock plate 44, 45,
This is because the PLAY(R) operating lever 42 as well as the PLAY(F) operating lever 43 are unlocked, making it impossible to perform playback in the reverse direction.

The locking member 46 is formed by molding a synthetic resin material, and as shown in FIG.
A base portion 462 rotatably supported by a shaft 461 protruding from the base portion 462, a lock portion 463 extending from the base portion 462 in a substantially L-shape, and the base portion 462 and the lock portion 463 forming a substantially varnished structure. It consists of an elastic section 464 extending as shown. The branching portion 465 between the lock portion 463 and the elastic portion 464 is
As shown in FIG. 11, it is formed into a substantially curved shape. Further, the distal end in the extending direction of the lock portion 463 is bent toward the elastic portion 464, and a protrusion 466 is formed at the distal end. moreover,
A curved portion 467 that swells outward is formed at the distal end in the extending direction of the elastic portion 464 . and,
A protrusion 468 formed on the bottom-like flat portion 1a of the main chassis 1 is in contact with the outside of the curved portion 467 of the elastic portion 464.

In addition, the PLAY(R) operating lever 42 includes:
A through hole 421 is formed at a position corresponding to the protrusion 466 of the lock portion 463. This through hole 421
At one end, there is a tapered part 422 that provides relief from the protrusion 466 of the locking part 463 when the PLAY (R) operating lever 42 is moved upward in the figure, and the PLAY (R) operating lever 42 shown in the figure. A locking portion 423 is formed that bites in against movement in the middle and downward direction. Furthermore, the lock portion 463 of the lock member 46 is located at the upper side of the second lock plate 45 in the figure.
A protrusion 451 is formed in a portion facing the outside.

Here, when the PLAY(R) operating element 2c is pressed, the PLAY(R) operating lever 42 slides upward in the figure, and the tapered portion 422 presses the protrusion 466 of the locking portion 46, thereby locking the locking member. 4
The lock part 463 of No. 6 is centered on the shaft 461.
It is rotated clockwise in Figure 0. At this time, since the curved portion 467 of the elastic portion 464 is in contact with the protrusion 468, the elastic portion 464 applies a biasing force to the lock portion 463 in the counterclockwise direction in the figure. and,
The locking portion 423 of the PLAY(R) operating lever 42 is
When the locking member 46 reaches a position facing the protrusion 466, the locking portion 463 of the locking member 46 is rotated counterclockwise in the figure by the action of the elastic portion 464.
The locking portion 423 of the PLAY(R) operating lever 42 is locked to the protrusion 466 of the locking member 46, and is held here.
The PLAY(R) operating lever 42 is locked in the operating position.

When the second lock plate 45 is slid to the left in the figure in such an operating state of the PLAY (R) operating lever 42, the protrusion 451 is moved against the lock member 46.
The lock portion 463 is pressed, and the lock portion 463 is rotated clockwise in the figure against the biasing force of the elastic portion 464. For this reason, the protrusion 46 of the locking member 46
6 is released from the locking part 423, and the PLAY(R)
The lock at the operating position of the operating lever 42 is released.

The detailed operation of the locking member 46 will now be explained. First, when the lock member 46 rotates clockwise in the figure from the state shown in FIG. 11a to the state shown in FIG. 11b,
While the lock portion 463 is rotating, the elastic portion 464
The outer side of the curved portion 467 slides on the protrusion 468 of the main chassis 1. Therefore, as the lock portion 463 rotates clockwise in the figure, the distance from the root of the curved portion elastic portion 464 and the base portion 462 to the contact portion of the elastic portion 464 and the protrusion 468 increases. The curved portion 467 can absorb the stress applied to the elastic portion 464.

In this regard, if the elastic portion 469 of the locking member 46 is simply straight, as shown in FIG. 12a, for example, the locking portion 469, as shown in FIG.
63 rotates clockwise in the figure, the elastic part 46
There are various problems such as the stress applied to the tube 9 being concentrated at the base, causing it to break or its elasticity to decrease.

Therefore, by forming the curved part 467 in the elastic part 464 of the locking member 46 as described above, the stress applied to the elastic part 464 can be uniformly dispersed, thereby preventing bending of the elastic part 464 or reduction in elastic force. etc., and is extremely effective. Furthermore, since the locking member 46 is formed by molding a synthetic resin material, it is easy to manufacture and economically advantageous.

Next, as shown in FIG. 8 again, the gear 28 has a first
The gears 47 are in mesh with each other. And this first
A second gear 48 coaxial with the flywheel 19 is meshed with the gear 47 . Here, as shown in FIG. 13, the first gear 47 has a first gear portion 471 with a small diameter and a second gear portion 4 with a large diameter.
72 are integrally formed, the first gear part 471 meshes with the gear 28, and the second gear part 471 meshes with the gear 28.
72 meshes with a second gear 48 not shown in FIG. And the first gear 47
A notch 473 as shown in FIG. 8 is formed in the second gear portion 472. As shown in FIG. Here, the gear 28 and the first gear 47 are rotatably attached to the bottom plane portion 1a of the main chassis 1 by pins 284 and 474, respectively, as shown in FIG. .

Here, the gear 28 and the first gear 47
When meshing with the first gear portion 471, it is necessary to determine the meshing position as follows. That is, as described above, the protrusion 281 of the gear 28 changes the position of the reverse drive lever 27, thereby causing the left and right playback sliders 25, 2
6 to perform playback in the forward and reverse directions. Therefore, when the protrusion 281 of the gear 28 is in the position shown in FIGS. 4 and 6, the notch 473 of the first gear 47 is placed in a position facing the second gear 48, must be prevented from rotating.

Therefore, as shown in FIG. 14, a positioning protrusion 286 is formed on a predetermined tooth 285 of the gear 28, and a positioning protrusion 286 is formed on two predetermined adjacent teeth 475, 476 of the first gear portion 471. protrusions 477 and 478 are formed. And the first
The gear 28 is assembled so that the teeth 285 on which the protrusions 286 of the gear 28 are formed are meshed between the teeth 475 and 476 on which the protrusions 477 and 478 of the gear portion 471 are formed.

Therefore, as mentioned above, the teeth 28 of the gear 28
5 and teeth 475 and 476 of the first gear portion 471, positioning protrusions 285 and 47 are provided, respectively.
By forming 7,478, gear 2 can be easily
8 and the first gear portion 471 can be aligned and meshed with each other, and the assembly work can be facilitated. Further, the positioning display portion provided on the gear 28 and the first gear portion 471 is not limited to the protrusions 285, 477, 478;
As shown in FIGS. 5a to 5c, the recess 491 and the step 4
92 and grooves 493, etc., can of course be applied.

Here, in FIG. 14, one tooth 28 of the gear 28
5, and protrusions 477, 478 are formed on the two teeth 475, 476 of the first gear part 471.
A protrusion is formed on two teeth of the first gear part 471.
A protrusion may be formed on one of the teeth.

Further, as a means for aligning the gear 28 and the first gear portion 471, the method shown in FIG. 16 can also be used. That is,
The means shown in FIG. 16 utilizes the fact that the plane parts of the gear 28 and the second gear part 472 overlap, and a through hole 287 is formed in the plane part of the gear 28 at a position opposite to the center of rotation of the gear 28. , 288,
A through hole 479 is formed in the plane part of the second gear part 472 so that the through hole 287 or 288 of the gear 28 and the through hole 479 of the second gear part 472 match.
The gear 28 and the first gear portion 471 are made to mesh with each other. In this case, a through hole 1e is also formed in the bottom flat part 1a of the main chassis 1, and first the through hole 479 of the second gear part 472 and the through hole 1e of the bottom flat part 1a are aligned, and this state By fixing the first gear 47 and meshing the through hole 287 or 288 of the gear 28 with the through hole 479 of the second gear part 472, alignment can be further improved. This is something that can be done easily.

Next, the constant speed tape running drive mechanism of the tape running drive mechanism 22 will be explained. In FIG. 17, the flywheels 19 and 20 are connected to a pulley 131 directly connected to the rotating shaft of the motor 13.
As shown in the figure, they are connected via a belt 132 so that rotational force can be transmitted. The flywheels 19 and 20 are rotated clockwise and counterclockwise in the figure, respectively, when the pulley 131 is rotated clockwise in the figure. here,
The flywheels 19, 20 are provided with small diameter gears 191, 201 and large diameter gears 192, 202 coaxially with the capstans 7, 8, which are the rotating shafts thereof, and are integrally formed with the flyholes 19, 20. It is designed to be rotated. Of these, the small diameter gears 191 and 201 are always meshed with the large diameter left and right winding gears 501 and 502, respectively.
And the left and right winding gears 501, 502
are protruding from left and right take-up levers 51 and 52 which are rotatably supported on the bottom flat part 1a of the main chassis 1 with the capstans 7 and 8 as rotation centers, respectively. axis 51
1,521, respectively, and are rotatably supported.

Here, the left and right winding levers 51, 52
is a locking portion 512, 52 formed at each end thereof.
2 and locking portions 513, 523 formed at predetermined positions on the bottom flat portion 1a of the main chassis 1,
Coil-shaped springs 514 and 524 are engaged, respectively, so that they are biased clockwise and counterclockwise in the figure. Gears 101 and 111 are respectively provided on the left and right reel stands 10 and 11 coaxially via a friction mechanism (not shown), and the left and right take-up levers 51 and 52 are connected to springs 514 and 524, respectively. The left and right take-up gears 501 and 502 mesh with the gears 101 and 111, respectively, when rotated clockwise and counterclockwise in the figure by the biasing force, respectively.

Then, the left and right winding levers 51, 52
are protrusions 515, 52 formed at the predetermined positions.
The upper end of the figure 5 is the left and right playback slider 2.
They are engaged with engagement pieces (not shown) formed at 5 and 26, respectively. Therefore, in the stopped state, the left and right playback sliders 25 and 26 are sufficiently lowered in the direction of arrow D in FIG. The first
7 Press downwards in the figure to remove the left and right take-up levers 5.
1 and 52 are rotated counterclockwise and clockwise in the figure against the urging force of springs 514 and 525, respectively, so that the left and right take-up gears 501 and 5
02 is the gear 10 of the left and right reel stands 10, 11
He has left 1,111.

In this stopped state, operate the PLAY(R) operator 2c to start PLAY as shown in FIG.
(R) Assume that the operating lever 42 is moved upward in the figure. Then, the left reproducing slider 25 is also moved in the same direction, so that its locking piece engages the left take-up lever 5.
The protrusion 515 of No. 1 is no longer pressed. Therefore, the left winding lever 51 is rotated clockwise in the figure by the biasing force of the spring 514, and the left winding lever 51 is rotated clockwise in the figure.
1 is meshed with the gear 101 of the left reel stand 10.
Therefore, the rotational force of the motor 13 is transmitted to the flywheel 19, which is rotated clockwise in the figure.
The rotational force is transmitted to the left reel stand 10 via the gear 191, the left take-up gear 501, and the gear 101,
The left reel stand 10 is rotated clockwise in the figure, and the tape runs at a constant speed in the opposite direction.

Also, instead of the PLAY(R) operator 2c above,
When the PLAY(F) operator 2e is operated, the explanation can be made in substantially the same manner as above. That is, at this time, the PLAY(F) operating lever 43 is moved upward in the figure, and the right playback slider 26 is also moved in the same direction. Then, the right winding lever 52 is rotated counterclockwise in the figure by the biasing force of the spring 524, and the right winding gear 502 and the gear 1 of the right reel stand 11 are rotated.
11 are meshed with each other. For this reason, the right reel stand 11
is rotated counterclockwise in the figure, and the tape runs at a constant speed in the forward direction.

Here, the pinch rollers 5 and 6 are rotatably supported at one end of pinch levers 531 and 532, respectively. This pinch lever 53
1,532 are rotatably supported at their other ends by shafts 533, 534 protruding from predetermined positions of the bottom-like flat portion 1a of the main chassis 1, respectively. In addition, the pinch levers 531, 53
2 are urged counterclockwise and clockwise in the figure by torsion springs 535 (the torsion springs of the pinch lever 532 are not shown), respectively. And the pinch lever 53
1 and 532 are rotated counterclockwise and clockwise in the figure, respectively, the pinch rollers 5 and 6 are brought into pressure contact with the capstans 7 and 8.

Here, approximately central portions of the pinch levers 531, 532 have protrusions 537, 5 that protrude upward in the figure.
38 is formed. Also, of the left and right take-up levers 51 and 52, the pinch lever 53
Engagement portions 516 and 526 that can come into contact with the protrusions 537 and 538 are formed in the portions facing the protrusions 537 and 538 of No. 1,532, respectively. During fast-forward playback (queue) and rewind playback (review), which will be described later, the left and right take-up levers 5
1 and 52 are rotated counterclockwise and clockwise in the figure, respectively, against the urging force of springs 514 and 524, and the engaging portions 516 and 526 are rotated against the pinch lever 5.
31 and 532 are pressed.
Therefore, the pinch levers 531 and 532 are rotated clockwise and counterclockwise in the figure, respectively, so that the pinch rollers 5 and 6 are separated from the capstans 7 and 8.

Next, a high-speed tape running drive mechanism of the tape running drive mechanism 22 will be explained. In FIG. 17, a high-speed drive lever 54 is provided between the left and right take-up levers 51, 52.
This high-speed drive lever 54 is a substantially elliptical plate body elongated in the vertical direction in FIG.
1 is rotatably supported. Further, at the upper part of the high-speed drive lever 54 in the figure, a high-speed gear 542 is provided.
is rotatably supported. A protrusion 543 is formed at the lower end of the high-speed drive lever 54 in the figure.

Here, below the high-speed drive lever 54 in the figure, a high-speed operation lever 55 that is substantially directly connected to and intersects with the high-speed drive lever 54 is supported so as to be slidable in the longitudinal direction. A bent locking piece 551 is formed at the center of the lower side of the high-speed operating lever 55 in the figure, and an annular portion of a torsion spring 552 is fitted into this bent locking piece 551. Both ends of the torsion spring 552 are extended upward in the figure, and after sandwiching the bent engagement piece 553 formed at the center of the upper side of the high-speed operation lever 55 in the figure, 54 protrusions 543 are sandwiched between them.

Further, at both ends of the high-speed operation lever 55,
Tapered portions 554 and 555 are formed, respectively. These tapered portions 554, 555 are connected to the REW
A REW operating lever 56 that slides upward in the figure in conjunction with the operations of the operating element 2b and FF operating element 2f.
and bent engagement pieces 561 and 571 formed on each side of the FF operation lever 57.

For example, when the REW operator 2b is operated, the REW operating lever 56 is slid upward in the figure. For this reason, the REW operation lever 56
The bent engagement piece 51 presses the tapered portion 554 of the high-speed operation lever 55, causing the high-speed operation lever 55 to slide to the right in the figure. Then, as shown in FIG. 18, one end of the torsion spring 552 is moved to the right in the figure together with the bent engagement piece 553 of the high-speed operation lever 55, so that the other end is moved to the right in the figure. 543 in the right direction in the figure. Therefore, the high-speed drive lever 54 is rotated counterclockwise in the figure, and at this time, the high-speed gear 542 is rotated between the gear 192 of the flywheel 19 and the left reel stand 10.
The gear 101 is meshed with the gear 101. Therefore, the rotational force of the flywheel 19 is transmitted to the gear 192 and the high-speed gear 5.
42 and gear 101 to the left reel stand 10, and the left reel stand 10 is rotated clockwise in the figure, causing the tape to run at high speed in the reverse direction.

Further, substantially the same explanation can be given when the FF operator 2f is operated instead of the REW operator 2b. That is, at this time, the FF operation lever 57 is moved upward in FIG. 17, and the high-speed operation lever 55 is accordingly moved to the left in the figure. Therefore, the high-speed drive lever 54 is rotated clockwise in the figure, and the high-speed gear 542 is rotated between the gear 202 of the flywheel 20 and the gear 111 of the right reel stand 11.
The right reel stand 11 is rotated counterclockwise in the figure, causing the tape to run at high speed in the forward direction.

Next, the aforementioned fast forward playback (queue) and rewind playback (review) states will be explained. That is, as shown in FIG. 17, a high-speed slider 58 (indicated by a dotted line in the figure) is provided between the left and right take-up levers 51 and 52 so as to be slidable in the vertical direction in the figure. At the lower part of the high-speed slider 58 in the drawing, extending portions 581 and 582 are formed which can be engaged with the bent engagement pieces 561 and 571 of the REW and FF operating levers 56 and 57, respectively. Further, tapered portions 583 and 584 of the shape shown in the figure are formed on both sides of the high-speed slider 58, respectively. Here, the left and right winding levers 51, 52
The tapered portion 583 of the high-speed slider 58,
Engagement protrusions 517 and 527 that can be engaged with 584 are formed, respectively.

Now suppose that the REW operator 2b is operated to perform a cue operation in the reverse playback state as shown in FIG. Then, as shown in FIG. 18, the REW control lever 56 is moved upward in the figure, and in conjunction with this, the head slider 3 is lowered slightly downward in the figure, causing the recording/playback head 4 to run in the reverse direction of the tape. The tape will be lightly touched while on the corresponding track. At this time,
Since the bent engagement piece 561 of the REW operation lever 56 pushes up the extension portion 581 of the high-speed slider 58,
The high speed slider 58 is moved upward in the figure. Then, the tapered portion 583 of the high-speed slider 58 presses the engagement protrusion 517 of the left winding lever 51, and the left winding lever 51 is rotated counterclockwise in the figure against the biasing force of the spring 514. . Therefore, the left take-up gear 501 is separated from the gear 101 of the left reel stand 10, and the high speed gear 542 meshes with the gear 101 instead, causing the left reel stand 10 to rotate at high speed clockwise in the figure. At this time, with the left take-up lever 51 being pressed by the tapered part 583 of the high-speed slider 58 and rotated counterclockwise in the figure, the engaging part 516 of the left take-up lever 51 is connected to the protrusion of the pinch lever 531. 537
is pressed and the pinch lever 531 is rotated clockwise in the figure, so the pinch roller 5 is separated from the capstan 7. Therefore, when the recording/reproducing head 4 is in light contact with the tape with a track corresponding to running the tape in the reverse direction, the tape is running at high speed in the reverse direction, and a cue operation is performed here.

Furthermore, if a review operation is to be performed in the reverse playback state shown in FIG. 17, the FF operator 2f may be operated. Then, in FIG. 18, the FF operation lever 57 is moved upward in the figure in place of the REW operation lever 56, and in conjunction with this, the head slider 3 is lowered slightly downward in the figure, and the recording/playback head is moved upward. 4 is brought into light contact with the tape while it is on the track corresponding to the backward running of the tape. At this time, the FF operation lever 57
In conjunction with this, the high-speed slider 58 is moved upward in the figure, and its tapered portion 583 presses the engagement protrusion 517 of the left winding lever 51. Therefore, the left take-up lever 51 is rotated counterclockwise in the figure, the left take-up gear 501 is separated from the gear 101 of the left reel stand 10, and the pinch lever 531 is rotated clockwise in the figure. , the pinch roller 5 is the capstan 7
be separated from In this state, the high-speed gear 542 meshes with the gear 111 of the right reel stand 11, and the right reel stand 11 is rotated at high speed counterclockwise in the figure. For this reason, when the recording/reproducing head 4 is on a track corresponding to tape running in the reverse direction and in light contact with the tape, the tape is running at high speed in the forward direction, and a review operation is performed here.

On the other hand, when performing queue and review operations while the tape is playing in the forward direction, the right take-up lever 52 is controlled by the tapered portion 584 of the high-speed slider 58 by operating the FF and REW operators 2f and 2b. , which can be explained in substantially the same manner as above.

Therefore, as described above, during the queue and review operations, the left and right take-up levers 51 and 52 rotate the pinch levers 531 and 532 to separate the pinch rollers 5 and 6 from the capstans 7 and 8. By doing so, the pinch rollers 5 and 6
This makes it possible to lengthen the stroke for separating the capstans 7 and 8 from the capstans 7 and 8. That is,
The conventional mechanism for performing queue and review operations is
The pinch roller is moved away from the capstan in conjunction with the head slider. However, the head slider only needs to be moved to a position where the recording/reproducing head lightly contacts the tape, and the movement stroke thereof is extremely short. For this reason,
When the pinch roller is linked to the head slider, there is a problem in that it is difficult to separate the pinch roller from the capstan sufficiently.

However, as mentioned above, the high speed slider 58
The left and right take-up levers 51, 52 are rotated by the taper portions 583, 584 of the pinch rollers 5, 6, thereby separating the pinch rollers 5, 6 from the capstans 7, 8. 6
are moved independently of the operation of the head slider 3, and the pinch rollers 5, 6 can be sufficiently separated from the capstans 7, 8. Also, since the left and right take-up levers 51 and 52 support the left and right take-up gears 501 and 502, the left and right take-up gears 501 and 502 are connected to the gears 101 and 101 of the left and right reel stands 10 and 11, respectively. The timing for separating the pinch rollers 5 and 6 from the capstans 7 and 8 can be easily set.

Next, the ASO mechanism 24 will be explained.
That is, as shown in FIG.
0, a friction member 102 is coaxially attached via a friction mechanism (not shown). This friction member 10
2 is connected to the left reel stand 1 via the friction mechanism so as to be rotated together with the left reel stand 10 in a no-load state.
It is attached to 0. One end of the friction member 102 is brought into contact with a pin 591 projecting from one end of the ASO lever 59 having the shape shown in the figure. A long hole 592 is formed at one end of the ASO lever 59, and a pin 601 projecting from one end of the detection lever 60 is fitted into the long hole 592. Further, a pin 602 is provided at one end of the detection lever 60, and the pin 602 comes into contact with the other end side of the friction member 102. The detection lever 60 has a shaft 603 whose other end protrudes from the bottom flat surface 1a of the main chassis 1.
It is fitted in and supported rotatably.

Further, the ASO lever 59 is rotatably supported by having its substantially central portion fitted into a shaft 593 protruding from the bottom-like flat portion 1a. Of this ASO lever 59, the shaft 593
A pin 594 is provided protruding approximately at the center between the two ends. The pin 594 is engaged with a cam portion 503 formed on the left take-up gear 501 so as to be slightly eccentric about the shaft 511 thereof. Furthermore, a protrusion 504 is formed on the flat surface of the left winding gear 501 on the outer peripheral side of the cam portion 503 . As shown in FIG. 20, this protrusion 504 has a tapered portion 505 formed on the tip end side in the rotational direction of the left take-up gear 501, which is rotated counterclockwise in the figure.

Here, at the other end of the ASO lever 59,
An engaging piece 595 is formed which has a substantially L-shaped side surface and whose corner engages with one end of the release lever 61 which is rotatably supported by a shaft 611 formed on the bottom flat surface 1a of the main chassis 1. There is. This release lever 6
The other end of the lever 1 is interlocked with the operating levers 14 and 15. In addition, the unraveling lever 61
A shaft 612 is formed at one end, and one end of an ASO select lever 62 is rotatably supported on the shaft 612. This ASO select lever 6
2 is biased clockwise in the figure by a coiled spring 621 being engaged between one end thereof and one end of the release lever 61; The movement continues until one end of the ASO select lever 62 comes into contact with a pin 613 protruding from one end of the release lever 61. At this position of the ASO select lever 62, the locking piece 622 formed at the other end of the ASO select lever 62 is engaged with the bent locking piece 622 formed at the upper side of the second lock plate 45 in the figure. Piece 4
52.

The flywheel 19 also has a gear 1.
A protrusion 193 is formed integrally with the protrusion 92 and at a position facing the protrusion 504 of the left winding gear 501.

In the configuration shown in FIG. 19, if the tape is currently running in the opposite direction, both the left and right reel stands 10, 11 are rotated clockwise in the figure, as shown in FIG. 21. Therefore, one end of the friction member 102 is pressed against the pin 591 of the ASO lever 59, and the ASO lever 59 is biased counterclockwise in the figure. At this time,
The pin 594 of the ASO lever 59 is connected to the left take-up gear 50
1, and the left take-up gear 501 is rotated counterclockwise in the figure by the rotational force of the flywheel 19.
The ASO lever 59 is performing a swinging motion along the cam portion 503. In addition, the right winding gear 502
is idly rotated by the rotational force of the flywheel 20.

On the other hand, if the tape is running in the forward direction, as shown in FIG.
0 and 11 are both rotated counterclockwise in the figure. Therefore, the other end of the friction member 102 is pressed against the pin 602 of the detection lever 60, and the detection lever 60 is rotated clockwise in the figure. Then, the ASO lever 59, which is connected to the detection lever 60 via the pin 601, is urged counterclockwise in the figure. For this reason, pin 59 of ASO lever 59
4 is in contact with the outer circumferential surface of the cam portion 503 of the left winding gear 501, and the ASO lever 59 swings along the cam portion 503 in the same manner as described above.

That is, the ASO lever 59 swings along the cam portion 503 whether the tape is running in the forward or reverse direction.

When the tape reaches the end while running in the forward and reverse directions as described above, the left and right reel stands 10,
Suppose that the rotation of No. 11 is stopped. Then, ASO
Connect the pin 594 to the lever 59 on the left winding gear 501.
Since the biasing force that had been applied to contact the cam portion 503 of the ASO lever 59 is removed, the ASO lever 59 swings at a position where its pin 594 corresponds to the outermost periphery of the cam portion 503, as shown in FIG. dynamic movement is stopped. Therefore, when the left take-up gear 501 is further rotated counterclockwise in the figure, the pin 594 of the ASO lever 59 passes through the tapered part 505 of the left take-up gear 501 and becomes a protrusion, as shown in FIG. 50
4 Climb onto the top. Then, the other end of the ASO lever 59 is struck by a protrusion 193 formed on the gear 192 of the flywheel 19, and is rotated clockwise in the figure. Therefore, the engaging portion 595 of the ASO lever 59 presses one end of the release lever 61, and the release lever 61 is rotated clockwise in the figure. As a result, the locking piece 622 of the ASO select lever 62 engages with the bent locking piece 452 of the second lock plate 45, and the second lock plate 45 moves to the left in the figure ( PLAY(F), REW, which were locked to the first and second lock plates 44, 45 and the lock member 46 (the first lock plate 44 also interlocked),
FF and PLAY(R) operating levers 43, 56, 5
7, 42, etc. are now unlocked from the operating position, and the ASO function is performed here.

Therefore, as described above, the rotation centers of the left and right winding levers 51 and 52 are coaxial with the capstans 7 and 8, and the left and right winding gears 501 and 502 are aligned with the gear 191 of the flywheels 19 and 20. ,201
The left and right winding gears 50 are always meshed with each other.
1,502 (left take-up gear 501 in the above explanation)
By using it for the ASO mechanism 24 , the configuration is simple and reliable operation can be achieved, and the left take-up gear 501 can be engaged with the gear 101 of the left reel stand 10 or not. Since the tape is always rotated in the same direction, reliable ASO operation can be performed regardless of whether the tape is running at high speed or at a constant speed.

Furthermore, in correspondence with the left take-up gear 501 that is constantly rotated for the ASO mechanism 24 , the right take-up gear 502 is always rotated regardless of whether the tape is running at high speed or at a constant speed. 19 and 20, the wow and flutter, the noise level, etc. are balanced, and good tape running can be achieved. In this respect, it is particularly effective to use the same shape for the left and right take-up gears 501 and 502, which is also economically advantageous.

Here, as shown in FIG. 22, when the left and right reel stands 10 and 11 are rotating counterclockwise in the figure, that is, when the tape is running in the forward direction, the ASO
The lever 59 is not directly engaged with the friction member 102,
The detection lever 60 is used for engagement. The reason for this will be explained below. In other words, the conventional ASO mechanism, as shown in Figure 25,
Pins 632 and 633 are provided on the ASO lever 631,
Friction member 63 depending on whether the tape runs in the forward or reverse direction.
4 presses the pins 632 and 633, respectively,
The ASO lever 631 is biased counterclockwise in the figure about its rotation shaft 635. However, in the conventional ASO mechanism as described above, the distance (l ₁ ) from the pin 632 to the rotation axis 635 is different from the distance (l ₂ ) from the pin 633 to the rotation axis 635. Therefore, if the force with which the friction member 634 presses the pins 632 and 633 is the same, the pin 632 is pressed more when the tape is running in the opposite direction, that is, when the friction member 634 is pressing the pin 633. than when
The biasing force applied to the ASO lever 631 becomes weaker,
This poses a problem in that the operation becomes uncertain.

In order to solve this problem, the detection lever 60
is provided. That is, the 26th
The figure shows the relationship between the ASO lever 59, the detection lever 60, and the friction member 102 in principle. In other words, the distance (a) from the shaft 593 of the ASO lever 59 to the pin 601 of the detection lever 60 is made approximately equal to the distance (b) from the pin 601 of the detection lever 60 to the shaft 603, and the ASO lever 59
The distance (c) from the shaft 593 of the sensor 9 to the pin 591 is set to be approximately equal to the distance (d) from the shaft 603 of the detection lever 60 to the pin 602. In this way, by setting a≒b and c≒d, even if the friction member 102 presses either the pin 591 or 602, the final
The biasing force for rotating the ASO lever 59 in the counterclockwise direction in the figure can be made substantially the same, ensuring reliable
It is possible to perform ASO operation.

As described above, a feature of the present invention is that the detection lever 60 is used to make the urging force of the ASO lever 59 substantially equal.

Next, the operating levers 14 and 15 of the auto-reverse frequency limiting mechanism and manual reverse mechanism will be explained. That is, each of these operating levers 14 and 15 are both rotatably supported in a substantially seesaw shape. First, the operation lever 15 of the manual reverse mechanism will be explained. This operation lever 15 engages with the other end of the release lever 61 shown in FIG. 24, and when operated, the release lever 61 is moved clockwise in the figure. It rotates. By the way, in the auto-reverse operation state where both the PLAY(R) and PLAY(F) operators 2c and 2e are operated, it is not possible to assume that the PLAY(R) and PLAY(F) operators 2c and 2e are operated together. The ASO select lever 62 is rotated counterclockwise in the figure by an interlocking lever (not shown) against the biasing force of the spring 621. Therefore, when the operation lever 15 is operated, the release lever 61 is rotated clockwise in the figure. Even if the ASO select lever 62 is rotated in the
The locking piece 622 of the second lock plate 45 does not engage with the bent locking piece 452 of the second lock plate 45, so that the ASO operation is not performed.

Then, in conjunction with the rotation of the release lever 61, the lock lever 29 (see FIG. 4) is moved to the gear 28.
The tape is rotated in a direction in which it is released from the locking portion 282 or 283, and switching between the forward and reverse directions can be performed at any position while the tape is running at a constant speed.

On the other hand, the operation lever 14 of the reverse number limit mechanism
The first position stops the tape reciprocating constant speed movement after only one reciprocation, and the second position allows the tape to be repeated an infinite number of times.
It is possible to take the following positions. Then, with the operating lever 14 being operated to the first position,
In FIG. 24, a connecting member (not shown) is interposed between the engaging portion 595 of the ASO lever 59 and the extending portion 442 formed at the left end of the first lock plate 44 in the figure. . Here, the above PLAY
When the tape reaches the end in the forward playback state of the auto-reverse state in which both the (R) and PLAY (F) operators 2c and 2e are operated, the ASO lever 59 is moved clockwise in FIG. 24 by the ASO mechanism 24 . Rotated. Therefore, the engaging portion 595 of the ASO lever 59 is connected to the first lock plate 4 via the connecting member.
Press the extending portion 442 of No. 4 to the left in the figure. Then, it was locked on the first lock plate 44.
The PLAY(F) operating lever 43 is unlocked. At this time, since the previous state is the auto-reverse state, the locking piece 622 of the ASO select lever 62 is not engaged with the bent locking piece 452 of the second lock plate 45, so the PLAY (R) operation lever 42 is It remains locked in the operating position.

Then, when the tape reaches the end while being played in the reverse direction, the locking piece 622 of the ASO select lever 62 engages with the bent locking piece 452 of the second lock plate 45, and the second lock Board 45
Move to the left in the figure. For this reason, PLAY
(R) The operating lever 42 is unlocked, and one reciprocating regeneration is performed here.

Further, when the operating lever 14 is operated to the second position, the connecting member is moved to the ASO lever 59.
The engaging portion 595 of the lock plate 44 and the extending portion 4 of the first lock plate 44
42. And PLAY(R)
In the auto reverse state when both PLAY (F) operators 2c and 2e are operated, the ASO select lever 6
Since the second locking piece 622 is in a position where it does not engage with the bent locking piece 452 of the second locking plate 45, the release lever 61 is moved by the ASO mechanism 24 every time the tape reaches the end. Even if the release lever 61 is rotated clockwise in FIG. 24, the ASO operation is not performed, and the lock lever 29 is rotated in conjunction with the rotation of the release lever 61 to switch between forward and reverse tape playback. , where the tape can theoretically be reciprocated at a constant speed an infinite number of times.

Here, the shapes of the operating levers 14 and 15 will be explained. That is, as shown in FIG. 27, both operating levers 14 and 15 are formed into the same shape by molding, for example, a synthetic resin material. A pair of protrusions 141, 142 and 151, 152 are formed in the substantially central portions of both operating levers 14, 15 in the longitudinal direction, respectively. Here, the operation lever 14 has a protrusion 141 that is
It is rotatably supported by being fitted onto a side plate 1f attached to the main chassis 1. The rotation of the operating lever 14 is defined within a range in which the other protrusion 142 can move within a substantially fan-shaped through hole 143 formed in the side plate 1f.

On the other hand, the operating lever 15 has a protrusion 152
is rotatably supported by being fitted onto the side plate 1f. Then, the operation lever 1
5 is defined within a range in which the other protrusion 151 can move within a substantially fan-shaped through hole 153 formed in the side plate 1f.

Furthermore, operating knobs 144 and 154 are fitted to one end of each of the operating levers 14 and 15, respectively. Furthermore, the protrusions 142, 152 of both operating levers 14, 15, and the operating knobs 144, 15
4, a pair of recesses 145 and 155 are formed in the vertical direction in the figure. Further, the above-mentioned connecting member is attached to the other end of both operating levers 14, 15 at the engaging portion 595 of the ASO lever 59 in FIG.
and the extension portion 442 of the first locking plate 44 , to which a lever (not shown) is engaged for intervening or disengaging the first locking plate 44 , and the other end of the release lever 61 . Engagement portions 156 for performing manual reverse operation are respectively formed. Furthermore, protrusions 147 and 157 are formed on the upper sides of both operating levers 14 and 15 in the drawing.

Here, both the operating levers 14 and 15 are supported by a leaf spring 64. That is, this strip spring 64 has its substantially central portion attached to the side plate 1f by a screw 641, and the portion where the projections 141, 152 of the operating levers 14, 15 are formed is connected to the side plate 1f. a support piece 642 held between
643, an elastic piece 645 having a protrusion 644 that can engage with the recess 145 of the operating lever 14, and an elastic piece 646 that presses the protrusion 157 of the operating lever 15 and urges it counterclockwise in the figure. It is something that has been done.

First, the operating lever 14 will be explained. As mentioned earlier, this operating lever 14 is
This is for interposing a connecting member between the engaging portion 595 of the ASO lever 59 and the extending portion 442 of the first lock plate 44 and for separating it. The movement stroke of the connecting member is actually small, and by rotating the operating lever 14 around the protrusion 141 near the engagement part 146, the movement stroke of the engagement part 146 is reduced. It is possible to make a slight stroke corresponding to the movement stroke of the connecting member. In addition, when the operation lever 14 is operated, as shown in FIGS. 27 and 28, the protrusion 644 of the elastic piece 645 is engaged with either one of the pair of recesses 145, and the number of autoreversals is limited. It is fixed at the first and second positions.

On the other hand, the operating lever 15 engages with a release lever 61 and rotates the release lever 61 to switch between forward and reverse constant speed travel. The rotation stroke of the release lever 61 is substantially large, and by rotating the operating lever 15 around the protrusion 152 far from the engagement portion 156, the movement stroke of the engagement portion 156 is can be made into a large stroke corresponding to the rotational stroke of the release lever 61. Also,
When the operation lever 15 is operated as shown in FIG. 28, its protrusion 157 is pressed by the elastic piece 646 of the leaf spring 64, and a biasing force in the return direction is applied. will be returned to its original position.

Therefore, as mentioned above, the operation lever 14,
15 has a pair of protrusions 141, 142 in its longitudinal direction.
and 151, 152, and in this case, the operating lever 14 is rotated around the protrusion 141, and the operating lever 15 is rotated around the protrusion 152, so the operating lever 14, 15 can be used to make the movement strokes of the engaging portions 146 and 156 different, and the structure can be extremely simple and economically advantageous.

Next, the REC lock mechanism 23 will be explained. That is, as shown in FIG. 29, in the upper part of the figure between the left and right reel stands 10 and 11, there is a substantially U-shaped REC stop lever 65 with its base 65
1 is fitted onto a shaft 652 protruding from the bottom-like flat portion 1a of the main chassis 1, thereby being rotatably supported. This REC stop lever 6
A locking portion 653 bent into a substantially L-shape is formed at one end portion of 5, and a protrusion 654 is formed therein. Further, the REC stop lever 65 has a locking portion 655 formed at the other end thereof.
A coil-shaped spring 656 is engaged between the base plate and a locking portion (not shown) formed on the bottom-like plane portion 1a, thereby being biased counterclockwise in the figure.

Here, a substantially L-shaped extending portion 657 is formed at the base 651 of the REC stop lever 65, and a protruding portion 658 is formed in the extending portion 657. This protrusion 658 is engaged with one end of a REC control lever 66 whose substantially central portion is rotatably supported by a shaft 661 protruding from the bottom-like flat surface 1a of the main chassis 1. Also, this
The other end of the REC control lever 66 has a bending engagement portion 6.
62 is formed, and the bent engagement portion 662 is loosely fitted into a through hole 671 formed approximately at the center of the switch lever 67 having the shape shown. The switch lever 67 is rotatably supported by having one end thereof fitted onto a shaft 672 that projects from the bottom flat portion 1a of the main chassis 1. Also,
A bent engagement portion 673 is formed at the other end of the switch lever 67 . Here, the above REC
Since the stop lever 65 is urged counterclockwise in the drawing by the spring 656, the REC control lever 66 and the switch lever 67 are urged clockwise and counterclockwise in the drawing, respectively. A spring 674 is attached to the other end of the switch lever 67, and the switch lever 67 is biased clockwise in the figure. The switch lever 67 is rotated clockwise in the figure until the lower part of the bent engagement part 673 comes into contact with a locking part (not shown) formed on the head slider 3. That is, in this position, the REC, which is provided to be slidable in the vertical direction in the figure in conjunction with the operation of the REC operator 2d,
An opening 659 of the REC stop lever 65 faces a bent locking piece 681 formed at the upper end of the operating lever 68 in the figure.

Also, the bending engagement portion 6 of the switch lever 67
73 is opposed to a stepped portion 431 formed on one side of the PLAY(F) operating lever 43. Further, a tapered portion 585 is formed at the base of the high-speed slider 58, and this tapered portion 585 is connected to the second
The lock plate 45 is opposed to a bent engagement portion 453 formed on the upper side in the figure. Here, the above
When the PLAY(F) operator 2e is operated, the PLAY(F) operating lever 43 is slid upward in the figure, and its stepped portion 431 engages with the bending engagement portion 673 of the switch lever 67.
is pressed, and the switch lever 67 is rotated counterclockwise in the figure, but this switch lever 67 cannot be used to operate the other PLAY(R) operators 2c, REW and FF operators 2b, 2f. It is also rotated counterclockwise in the figure. Furthermore, at the upper part of the high-speed slider 58 in the figure, there is a tapered part 5 that engages with the protrusion 654 of the REC stop lever 58.
86 is formed.

Now, if you are trying to record in the forward direction of the tape and operate both the REC and PLAY (F) controls 2d and 2e, the REC and PLAY (F) control lever 68,
43 is slid upward in the figure. Then,
The stepped portion 431 of the PLAY (F) operating lever 43 presses the bending engagement portion 673 of the switch lever 67, and the switch lever 67 is rotated counterclockwise in the figure, and the REC operating lever 68 is bent. Locking piece 68
1 is inserted into the opening 659 of the REC stop lever 65. Therefore, as shown in FIG. 30, as the switch lever 67 rotates counterclockwise in the figure, the REC control lever 66 is rotated clockwise in the figure, and the REC stop lever 65 is moved by the spring 656. It is rotated counterclockwise in the figure. Therefore, the bent locking piece 681 of the REC operation lever 68 is connected to the locking portion 65 of the REC stop lever 65.
3, and the REC operating lever 68 is locked at the operating position. At this time, the PLAY (F) operating lever 43 is locked to the first lock plate 44, as described above, and recording is performed here in the forward direction.

In this forward recording state, when the tape reaches the end, the ASO
The mechanism 24 causes the second lock plate 45 to slide to the left in the figure. At this time, the bending engagement portion 453 of the second lock plate 45 presses the tapered portion 585 of the high-speed slider 58, so that the high-speed slider 58
is moved upward in the diagram. Therefore, the tapered portion 586 of the high-speed slider 58 presses the protrusion 654 of the REC stop lever 65, and the REC stop lever 65 is rotated clockwise in the figure against the biasing force of the spring 656. Then, the locking portion 653 of the REC stop lever 65 disengages from the bent locking piece 681 of the REC operating lever 68, and the REC operating lever 68 is returned to its original position. on the other hand,
The PLAY (F) operating lever 43 moves the first lock plate 44 in conjunction with the movement of the second lock plate 45 in the left direction in the figure.
is moved in the same direction to return to its original position as described above, and is brought to a stopped state.

Therefore, as mentioned above, the second lock plate 4
By returning the REC operating lever 68 using the high-speed slider 58 that is linked to the slider 58, the REC operating lever 68 can be reliably returned with a simple configuration. That is,
The conventional means for returning the REC operating lever is to rotate the REC stop lever in conjunction with the return of the head slider to return the REC operating lever. However, such conventional means have various problems, such as an extremely complicated structure and the necessity of increasing the biasing force of the spring for returning the head slider.

However, as mentioned above, the second lock plate 4
Since the REC stop lever 65 is rotated by the high-speed slider 58 that is linked to the
To enable the REC operating lever 68 to be unlocked regardless of the operation of the head slider 3, to simplify the configuration, and to surely return the REC operating lever 68 without having to strengthen the spring for returning the head slider 3. It is something that can be done.

In addition, as mentioned above, PLAY(R) and
Since the switch lever 67 is rotated counterclockwise in FIG. 29 while the PLAY(F) operators 2c and 2e are being operated, the REC stop lever 65 is brought to the position shown in FIG. 30. Therefore, even if you try to operate the REC operator 2d in the forward and reverse playback states, the bent locking piece 681 of the REC operation lever 68
comes into contact with one end of the REC stop lever 65, and the REC operator 2d becomes inoperable, thereby preventing follow-up recording. Furthermore, when the REW and FF operators 2b and 2f are operated, the high-speed slider 58 is moved upward in the figure, so its tapered portion 586 presses the protrusion 654 of the REC stop lever 65, causing the REC stop lever 65 to move upward. Rotate clockwise in Fig. 29. At this time, the other end of the REC stop lever 65 is connected to the bent locking piece 6 of the REC operating lever 68.
The position is opposite to 81. Therefore, even if an attempt is made to operate the REC operator 2d during high-speed driving in the forward and reverse directions, the bent locking piece 681 of the REC operating lever 68 will come into contact with the other tip of the REC stop lever 65, and the REC operator 2d will It is made inoperable.

Here, as a means for releasing the lock of the REC operating lever 68, the method shown in FIG. 32 may be used. In other words, in the forward recording state
The ASO mechanism 24 operates and the second lock plate 45
is slid to the left in the figure, and along with this, the first
The lock plate 44 is also moved in the same direction, and the PLAY (F) operating lever 43 is released from the locked state. Then, the stepped portion 431 of the PLAY (F) operation lever 43 is disengaged from the bending engagement portion 673 of the switch lever 67, so that the switch lever 67 is rotated clockwise in the figure. For this reason, the REC control lever 66 and
Since the REC stop lever 65 is rotated counterclockwise and clockwise in the figure, the locking portion 653 of the REC stop lever 65 is disengaged from the bent locking piece 681 of the REC operating lever 68, so that the REC operating lever is rotated. 68 is unlocked.

Next, the high-speed operation lever 55 previously explained in FIGS. 17 and 18 will be explained. However, here, as shown in FIG.
7 are arranged parallel to each other on opposite sides, and the high speed lever 55
6,557, a protruding piece 558 formed at one end of each
The explanation will be given assuming that a spring 691 is engaged between the two parts so that they attract each other. When these two high-speed levers 556, 557 are combined, as shown in FIG.
4,694, and the screws 695, 695 are screwed onto a mounting plate 696 attached to the main chassis 1, so that the screws 695, 695 are supported slidably in the longitudinal direction. It is something.

Here, as shown in FIG. 35, both the high-speed levers 556 and 557 have engaging pieces 6 on their upper sides.
97,698 are formed, and the engagement piece 69
The protrusion 543 of the high-speed drive lever 54 is sandwiched between 7,698 and 7,698. For example, when the FF operation element 2f is operated, the FF operation lever 57 is slid upward in the figure in conjunction with this operation. Therefore, the bent engagement piece 571 of the FF operating lever 57 presses the tapered portion 555 of the high speed lever 557, causing the high speed lever 557 to slide to the left in the figure.
Then, this high speed lever 557 and spring 69
1 is slid in the same direction, and its engagement piece 697 presses the protrusion 543 of the high-speed drive lever 54, causing the high-speed drive lever 54 to rotate clockwise in the figure. For this reason,
The high speed gear 542 meshes with the gear 111 of the right reel stand 11, and the tape runs at high speed.

Here, each of the high speed levers 556, 55
As shown in FIG. 35, the angles of the tapered portions 554 and 555 of No. 7 are changed in three steps. That is, each tapered portion 554, 555 has REW and FF
With the operating levers 56 and 57 pressed,
The angle of engagement with the bent engagement pieces 561, 571 becomes shallower in sequence, in other words, the inclination is changed so that the force required to operate the REW and FF operating levers 56, 57 can be reduced.

Therefore, for example, when the FF operating lever 57 is pressed upward in the figure with the same force, when the angle of the tapered portion 555 changes, the load on the FF operating lever 57 becomes lighter, so it can be operated faster. Therefore, the high speed gear 542 is connected to the gear 111 and the gear 20.
2 and can be quickly engaged with each other. Regarding this point, as shown in FIG. 36, assuming that the inclinations of the tapered parts 554 and 555 are uniform, when the REW and FF operation levers 56 and 57 are pressed slowly with the same force, the high speed gear 542 becomes a gear. 101, 111 and 192, 202 are loosely meshed. Therefore, there is a problem in that an unpleasant sound is generated the moment the teeth come into contact.

However, if the angle of the tapered portions 554, 555
For example, by changing the load on the REW and FF operating levers 56, 57 so that they become lighter sequentially,
When pressing the FF operation lever 57 with the same force,
Since the operational load is lightened, the operation can be made faster. For this reason, the high speed gear 542 is
11 and the gear 202 can be meshed quickly, and generation of unpleasant noise can be prevented.

Furthermore, since both high-speed levers 556 and 557 are interlocked with each other by a spring 691,
Even if the REW and FF operators 2b and 2f are operated at the same time by mistake, the spring 691 will only be stretched, and the high speed levers 556 and 557 will not bend or twitch.

Here, FIG. 37 shows details of how the high-speed drive lever 54 and the shaft 541 are attached. That is, the high-speed drive lever 54 is formed with a through hole 544 through which the shaft 541 is inserted. and,
A pair of guide pieces 545, 545 and 546, 546 are protruded from the peripheral edge of the through hole 544 at positions facing each other. Among these, the guide pieces 546, 546 are the guide pieces 545, 54
5, and the tip thereof is bent inward to form locking portions 547, 547. Further, the shaft 541 has a small shaft portion 548 smaller in diameter than the shaft 541 formed at its tip, and a flange portion 549 at the tip of the small shaft portion 548.
It is formed by

When the shaft 541 of the high-speed drive lever 54 is inserted into the through hole 544 from above in the figure, the flange 549 engages the locking portion 54 of the guide pieces 546, 546.
7,547 and temporarily remove the guide piece 546,5.
Push 46 outward. Here, the shaft 54
1 is deeply inserted into the through hole 544, as shown in FIG.
47, 547 are locked to the lower end of the flange 549 in the drawing, and the high-speed drive lever 54 is rotatably attached to the shaft 541 here. Here, in FIG. 37, two guide parts 546, 546 are provided, and two locking parts 547, 547 are connected to the shaft 541.
Although the guide portion 546 is designed to prevent it from coming off, the number of guide portions 546 may be one, and one locking portion 547
However, it is possible to sufficiently prevent the shaft 541 from coming off.

Next, FIGS. 39a and 39b show details of how the high-speed drive lever 54 and the high-speed gear 542 are attached. That is, a shaft 701 is provided protruding from one end of the high-speed drive lever 54 . This axis 701
is inserted into a bearing 703 that is protruded in a substantially cylindrical shape from the center of the first high-speed gear 702, and supports the first high-speed gear 702 in a freely rotatable manner. A substantially ring-shaped friction body 704, shown by a group of fine dots in the figure, is attached to the flat surface of the first high-speed gear 702. Furthermore, a groove 705 is formed at the tip of the bearing 703 of the first high-speed gear 702 along the outer periphery of the bearing 703.

And the bearing 7 of the first high speed gear 702
03 is inserted into a through hole 707 formed in the center of the second high speed gear 706.
06 is rotatably supported. This second high-speed gear 706 is formed with a substantially concave side surface, and its bottom surface is connected to the friction body 7 of the first high-speed gear 702.
04. And the second above
A coiled spring 708 is installed in the recess of the first high-speed gear 706, and a spring receiver 709 is inserted from the top of the spring 708 in the figure.
It is attached to the bearing 703 of 02. That is, this spring receiver 709 is formed with a substantially concave side surface, and has a flange portion 7 in its opening that engages with the spring 708.
11 is formed. The spring receiver 709 also has a large-diameter first through hole 712 on its bottom through which the bearing 703 can be inserted, and a groove 7 of the bearing 703.
05 and a second through hole 713 with a small diameter that can be fitted into the hole 713 are continuously formed in a substantially pot-shaped shape. Furthermore, the first one of the openings of the spring receiver 709 is
A protrusion 71 is provided at the center on the circumference of the through hole 712.
4 is formed.

For this purpose, first, the first through hole 712 of the spring receiver 709 is inserted into the bearing 703. Then, the spring receiver 709 is slightly shifted and the second through hole 7 is opened.
13 is fitted into the groove 705 of the bearing 703. Then, the second through hole 713 of the spring receiver 709 is locked in the groove 705, so that the first and second high speed gears 702, 706 are connected to the friction body 704.
It is supported while being pressed by the biasing force of a spring 708. After that, the high-speed drive lever 54
There is a substantially ring-shaped bush 71 at the tip of the shaft 701.
Press in 5. Then, the peripheral edge of the bush 715 comes into contact with the protrusion 714 of the spring receiver 709, and the second through hole 713 of the spring receiver 709 contacts the bearing 70.
It is held so as not to come off from the groove part 705 of No. 3,
Here, first and second high speed gears 702, 706 are rotatably supported by the high speed drive lever 54.

Here, the first high speed gear 702 meshes with the gears 101, 111 of the left and right reel stands 10, 11, and the second high speed gear 706 meshes with the gears 192, 202 of the flywheels 19, 20. It is something. Therefore, the tape reaches the end while the tape is running at high speed, and the left and right reel stands 10, 11
When the rotation of the tape is stopped, a slip occurs between the first and second high-speed gears 702 and 706, so that unnecessary load is not applied to the tape.

Therefore, as described above, by fitting the second through hole 713 of the spring receiver 709 into the groove 705 of the bearing 703 formed in the first high speed gear 702, the first and second High speed gear 702,7
By holding 06 integrally, the configuration can be made extremely simple and economically advantageous. That is, as mentioned above, when the tape running drive mechanism 22 is constructed using all gears, all the gears are made of, for example, nylon, etc., in order to prevent unpleasant sounds when the gears mesh and gear noise when rotating. It is molded using a soft synthetic resin material such as Pelprene. For this reason, it is difficult in terms of strength to press fit the spring receiver 709 into the bearing 703 and support it, so the structure shown in FIGS. 39a and 39b is adopted.

Regarding this point, conventional devices are configured as shown in FIGS. 40a and 40b. That is, this is the first
With the second high speed gear 723 inserted into the bearing 722 of the high speed gear 721, the spring 724
is installed, and the spring receiver 725 is press-fitted into the bearing 722. At that time, a metal reinforcing bush 726 is inserted into the bearing 722, and the spring receiver 725 is press-fitted into the bearing 722.
22 is reinforced, and in this state, a spring receiver 725 is press-fitted into the bearing 722 to support it. However, the conventional means shown in FIGS. 40a and 40b requires a large number of parts and has a complicated structure, and also uses a metal reinforcing bush 726, which is economically disadvantageous.

Therefore, as shown in FIGS. 39a and 39b, by fitting the second through hole 713 of the spring receiver 709 into the groove 705 formed in the bearing 703 of the first high speed gear 702, The number of parts is small, the assembly work is easy, and the first and second high-speed gears 702 and 706 can be reliably supported.
This is also economically advantageous.

Further, as shown in FIG. 41, the spring receiver 709 has a protrusion 716 formed at the peripheral edge corresponding to the center on the circumference of the second through hole 713, and the protrusion 716 By contacting the inner peripheral part of the high speed gear 706 of No. 2, the protrusion 71 shown in FIG.
4, the second through hole 71 of the spring receiver 709
3 can be held so that it does not come off from the groove 705 of the bearing 703.

Next, the attachment of the flywheels 19 and 20 will be explained in detail. That is, as shown in FIG. 42, the motor 13 and bearings 211 and 212 are respectively attached to the sub-chassis 18. The bearings 211 and 212 are formed by molding a synthetic resin material, and elongated holes 213 and 214 that are long in the width direction are formed approximately in the center thereof. The bearings 211, 212 have screws 215, 2 inserted into the long holes 213, 214.
16 is a screw hole 18 formed in the sub chassis 18
1 and 182, respectively, thereby being attached to the sub-chassis 18.

Here, the flywheel 19 and bearing 21 are as follows.
1 will be explained, and since the other flywheels 20 and bearings 212 have similar configurations,
The explanation will be omitted. That is, as shown in FIG. 43, the upper part of the capstan 7, which is the rotating shaft of the flywheel 19, is inserted through a bearing 732 that is fitted into a through hole 731 formed in the bottom flat part 1a of the main chassis 1. Then, the bottom plane portion 1a
It is projected upward in the figure. Further, a flywheel 19 is coaxially fitted to the lower part of the capstan 7 in the figure via a substantially cylindrical connecting member 733, so that the flywheel 19 and the capstan 7 are rotated integrally. is being done.
Furthermore, a portion of the capstan 7 between the bottom-like flat portion 1a and the flywheel 19 is
It is inserted through a through hole 734 formed at the rotation center of the gears 191 and 12, which are integrally formed by molding a synthetic resin material. A protrusion 735 is formed at the lower part of the gear 192 in the figure, and when the protrusion 735 is fitted into a recess 736 formed at the upper part of the connecting member 733 in the figure, the gear 191, 192 is configured to rotate integrally with the flywheel 19.

Further, the bearing 211 has protrusions 737 and 738 formed at both ends thereof, and by fitting the protrusions 737 and 738 into the through holes 182 and 183 formed in the sub-chassis 18, respectively, It is positioned and attached to the sub chassis 18. Further, the bearing 211 is formed with an elastic portion 739 that extends from one end thereof in a substantially tongue-like manner to a substantially central portion thereof. The lower end of the capstan 7 in the figure is connected to a long hole 184 (FIG. 44a) formed in the sub-chassis 18.
As shown in FIG. 2, the bearing 740 fitted in the bearing 211 (which is formed to be elongated in the width direction of the bearing 211) is inserted into the bearing 740, and is received by the elastic portion 739 of the bearing 211. Therefore, the capstan 7 is pressed upward in the drawing by the elastic portion 739 of the bearing 211, so that thrust backlash in the axial direction can be prevented.

Here, one protrusion 738 of the bearing 211
is cut into a substantially elliptical shape as shown in FIG.
11 is provided in a protruding manner at one end of an elliptical member 743. A substantially cross-shaped groove 744 is formed in this elliptical member 743.

Here, both protrusions 73 of the bearing 211
7,738 through the through hole 182,1 of the sub chassis 18
83, when a cross screwdriver (not shown) is applied to the groove 744 of the elliptical member 743 and rotated, the connecting parts 741 and 742 are torn as shown in FIG.
is separated from the bearing 211. Therefore, as shown in the figure, the bearing 211 is pressed against one end of the elliptical member 743, and the bearing 211 moves along the elongated hole 213 toward the protrusion 743.
It will rotate slightly around 7.

Here, one end of the bearing 740 is inserted into the long hole 184 of the sub-chassis 18 and then inserted into the bearing 2.
11 is fitted into a long hole 745 formed in the longitudinal direction. Therefore, the bearing 211 is attached to the protrusion 737.
When the capstan 7 is rotated around the center, the bearing 740 is also moved in the same direction, and the inclination angle of the capstan 7 can be adjusted.

Therefore, as described above, since the elastic part 739 is formed on the bearing 211 and the capstan 7 is pressed in one direction by the elastic part 739, the thrust movement of the capstan 7 can be reduced with an extremely simple structure. This is something that can be prevented.

Regarding this point, the conventional bearing means, as shown in FIG. 45, has a coiled spring 746 interposed between the flywheel 19 and the sub-chassis 18 to press the flywheel 19 upward in the figure and create a thrust force. I'm trying to hold it down. However, such conventional means has a problem in that it has a complicated structure and is difficult to assemble, and also impedes the normal rotation of the flywheel 19 and deteriorates wow and flutter.

However, as shown in FIG.
By pressing the lower end of the capstan 7 in the figure with the elastic portion 739 of 1, the structure is simple, the assembly work is easy, and it is economically advantageous.

Next, the PAUSE operator 2g will be explained. That is, as described above, this PAUSE operator 2g is locked in the operating position by the push mechanism by the first pressing operation, and is released from the locked state by the second pressing operation.
The details of the push mechanism will be explained below. That is, in FIG. 46, reference numeral 75 denotes a PAUSE which is provided to be slidable in the vertical direction in the figure in conjunction with the operation of the PAUSE operator 2g.
It is a control lever. This PLAUSE control lever 7
5 in the drawing is supported by a guide portion 751 formed on the bottom-like flat portion 1a of the main chassis 1 so as to be slidable in the vertical direction in the drawing. Furthermore, a bent engagement piece 752 is formed on one side of the PAUSE operating lever 75.

Here, the bottom plane portion 1 of the main chassis 1
A shaft 761 is protruded from the lower part of the figure a.
This shaft 761 has a base portion 764 from which a lock portion 762 and an elastic portion 763 (described later) extend, and is integrally molded with a synthetic resin material.
A base 764 of the PAUSE lock member 76 is loosely fitted so as to be rotatable. This base portion 764 is loosely fitted onto the shaft 761 so that it can not only rotate the PAUSE lock member 76 clockwise and counterclockwise in the figure, but also rotate the lock portion 762 toward the back in the figure. It is something that First, the lock portion 762 will be described. On one side of the lock portion 762, there is a bending engagement piece 75 that can be bent when the PAUSE operation lever 75 is moved upward in the figure.
2, a tapered portion 756 that is a relief from
A locking portion 766 is formed that bites into the bent engagement piece 752 when the PAUSE operation lever 75 is moved downward in the figure. Also, above
The PAUSE lock member 76 has a locking portion 766.
A guide tapered portion 767 is formed in the upper part of the figure to guide the bent engagement piece 752 of the PAUSE operation lever 75 in a direction in which it is locked with a locking portion 766. Further, the PAUSE lock member 76 has a tapered portion 768 formed inside the locking portion 766, which is inclined from the bottom to the top in the figure and sequentially toward the back in the figure. Further, inside the locking portion 766 of the PAUSE lock member 76, there is a stepped portion 7.
69 is formed.

On the other hand, the elastic portion 7 of the PAUSE lock member 76
63, as shown in FIGS. 47a and 47b, approximately S
It is curved into a letter shape. and,
A plurality of (four in the illustrated case) knots 770, .
It is formed so that the thickness becomes gradually thinner every 770 mm. Here, the tip of the elastic portion 763 is connected to the guide portion 751 as shown in FIG.
It is locked by. For this reason, the lock portion 7
62 is biased counterclockwise in the figure by an elastic portion 763, but the rotation of this lock portion 762 is
The lock portion 762 is extended to a position where it comes into contact with the bent engagement piece 752 of the PAUSE operation lever 75.

The operation of the push mechanism constructed as shown in FIG. 46 will be described below. First, when the PAUSE operator 2g is pressed, the PAUSE operation lever 7 is linked to this operation.
5 is moved upward in FIG. Then,
The bent engagement piece 752 of the PAUSE operation lever 75
The tapered portion 765 of the PAUSE lock member 76 is pressed, and the lock portion 762 is rotated clockwise in the figure against the biasing force of the elastic portion 763. and,
When the PAUSE operation lever 75 is moved sufficiently upward in the figure, its bent engagement piece 752 comes into contact with the guide tapered portion 767 of the PAUSE lock member 76.

In this state, when the pressing operation of the PAUSE operation element 2g is stopped, the PAUSE operation lever 75 is always urged in the return direction, that is, downward in the figure, by a spring (not shown), so that the bending engagement piece 75
2 is moved downward in the figure, the lock part 762 is rotated counterclockwise in the figure along the slope of the guide taper part 767. When the bending engagement piece 752 is disengaged from the guide taper portion 767, the stepped portion 769 of the locking portion 762 hits the bending engagement piece 752, and in this state, the PAUSE operation lever 75 is turned off as shown in FIG. Bending engagement piece 7
52 is locked to a locking portion 766 of the PAUSE lock member 76, and the PAUSE operating lever 75 is locked here at the operating position.

In this locked state, the PAUSE control 2 is pressed again.
When g is pressed, the PAUSE control lever 7 is pressed again.
5 is moved upward in the figure. Then, since the bent engagement piece 752 is disengaged by the stepped portion 769, the lock portion 762 is further rotated counterclockwise in the figure by the biasing force of the elastic portion 763. For this reason, the lock portion 7
62 taper portion 768 is located below the bent engagement piece 752 in the figure. At this time, when the pressing operation of the PAUSE operator 2g is stopped, the bending engagement piece 752 presses the tapered portion 768 because the PAUSE operation lever 75 is given a downward force to return in the figure. Therefore, the lock portion 762 is rotated toward the back in the figure and escapes the bent engagement piece 752, so that the PAUSE operation lever 75 is eventually returned to the original position shown in FIG. is to be carried out. Here, the lock portion 76
2 is rotated toward the back in FIG. 46, the locking portion 762 is about to be returned to its original position by the urging force of the elastic portion 763.

Therefore, as described above, since the PAUSE lock member 76 is formed with the elastic portion 763 that applies a return force to both the clockwise and backward rotations of the lock portion 762 in FIG. 46, The configuration is extremely simple and reliable push operation can be performed. In this regard, the conventional push-push mechanism is constructed in such a way that the lock portion of the PAUSE lock member and the spring that applies a return force in two directions to the lock portion are separate bodies. Therefore, the configuration becomes complicated and assembly work is difficult.

However, by integrally molding the lock portion 762 and the elastic portion 763 from a synthetic resin material, manufacturing is extremely easy and assembly work is also facilitated. Furthermore, since the thickness of the elastic part 763 is changed stepwise for each of the joints 770, . ...,7
This can be easily done by pressing 70.

Further, although the thickness of the elastic portion 763 described above is changed as shown in FIG. 49a, it is of course possible to change the width stepwise as shown in FIG. 49b. It is.

Next, as shown in FIG. 50, the ASO lever 59 is rotatably supported by a shaft 593 protruding from the bottom flat portion 1a of the main chassis 1. 593, the spring portion 77 of the leaf spring 77 is inserted from the top in the figure.
It is held down by 1. This plate spring 77 has a plurality of spring parts 772, .
is formed. The leaf spring 77 is operated by the plurality of spring parts 772, . . . , 772.
Together with the ASO lever 59, it also holds down other predetermined movable parts 78 and the like supported by shafts protruding from the bottom flat portion 1a of the main chassis 1.

The leaf spring 77 has an engaging elastic piece 774 extending from its base 773 inside a cylindrical fitting part 79 having a substantially flat opening protruding from the bottom flat part 1a of the main chassis 1. It is attached to the main chassis 1 by being fitted into the main chassis 1. The engagement elastic piece 774 of this plate spring 77 includes:
As shown in FIG. 51, there are a plurality of locking pieces 775, 776 (two in the illustrated case) that provide relief when the engaging elastic piece 774 is inserted into the fitting portion 79 and bite when it is pulled out. , are arranged in the insertion direction of the engagement elastic piece 774 into the fitting portion 79. On the other hand, in the fitting part 79, a cut hole 793 is formed in a surface 791 facing the locking parts 775, 776 of the engagement elastic piece 774, extending downward in the figure from an opening part 792 thereof.

For this reason, first attach the engaging elastic piece 774 to the fitting part 79.
When inserted inside, the locking portions 775, 77
6, the engaging elastic piece 774 engages the fitting portion 79.
It is prevented from coming out from within. Next, when pulling out the engaging elastic piece 774 from inside the fitting part 79, insert a jig such as a flat head screwdriver into the cutting hole 793 of the fitting part 79, and
It can be easily pulled out by pressing 6 and pulling the engagement elastic piece 774 in that state.

Therefore, with the configuration shown in FIG. 51, the leaf spring 77 can be reliably attached to the main chassis 1, and the leaf spring 77 can be easily and effortlessly removed, for example, during repair or inspection work. It is something that can be done.

Finally, the installation of the cassette lid lock slider 16 will be explained. That is, as shown in FIG. 52, the cassette lid lock slider 16 has an elongated plate shape, and at the bottom in the figure there is an engaging portion 161 that is interlocked with the STOP operator 2a via a double eject mechanism. It is formed. Also,
A lock portion 163 is provided at the upper portion of the cassette lid lock slider 16 in the figure and has a locking portion 162 at its tip end for locking the cassette lid (not shown) in the closed position.

Here, in the flat part 164 of the cassette lid lock slider 16, a first through hole 165 is formed which is elongated and narrow in width downward in the figure from the base of the lock part 163. This first through hole 165
A second through hole 166 wider than the first through hole 165 is formed in the lower part of the figure. Further, at the lower part of the second through hole 166 in the drawing, an elongated third through hole 167 having approximately the same width as the first through hole 165 is formed.

At the lower end of the third through hole 167, as shown in FIG.
It is formed so as to reach approximately the center of the

On the other hand, as shown again in FIG. A guide portion 801 having a height equivalent to that of the guide portion 801 is provided in a protruding manner. A locking portion 802 having a width that is loosely fitted into the second through hole 166 is formed at the tip of the guide portion 801 .

First, as shown in FIG. 53b, in the second through hole 166 of the cassette lid lock slider 16,
The locking portion 802 is inserted. At this time, the tip of the elastic piece 168 is pressed upward in the figure. In this state, as shown in FIG. 53c, when the cassette lid lock slider 16 is slid to the right in the figure, the guide portion 801 is fitted into the first through hole 165, and the elastic portion 168 is returned to its original position. returned to the state. Therefore, even if the cassette lid lock slider 16 is slid to the left in the figure, the tip of the elastic piece 168 will not come into contact with the guide part 801 and the locking part 802 will not face the second through hole 166. This prevents the cassette lid lock slider 16 from coming off. The cassette lid lock slider 16 is slid over the length of the first through hole 165 to open and close the cassette lid.

Therefore, according to the mounting means for the cassette lid lock slider 16 as described above, the locking portion 80 is simply
2 through the second through hole 166 and slightly shifted, the assembly work becomes extremely easy. Further, the cassette lid lock slider 16 can be easily formed by molding a synthetic resin material, which is economically advantageous.

Here, as shown in FIG. 53b, the locking portion 802 is formed wide in the longitudinal direction of the cassette lid lock slider 16 with respect to the guide portion 801. is the guide portion 8 in the longitudinal direction of the cassette lid lock slider 16.
Of course, the length may be the same as that of 01.

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

Therefore, as detailed above, according to the present invention, it is possible to stably and reliably detect tape running stop with a simple configuration, and an extremely good tape suitable for use in a tape recorder having an auto-reverse mechanism is provided. A tape running stop detection mechanism for a recorder can be provided.

[Brief explanation of drawings]

1 and 2 are a front perspective view and a back perspective view, respectively, showing a cassette tape recorder to which the present invention is applied, and FIG. 3 is a back perspective view showing a state in which the sub-chassis and flywheel have been removed from FIG. 2. 4 is a configuration diagram showing the basic configuration of the forward/reverse switching mechanism for tape running in the same cassette tape recorder, FIGS. 5 and 6 are operation explanatory diagrams of the forward/reverse switching mechanism, respectively, and FIGS. Fig. 8 shows the relationship between the PLAY (R) and (F) operating levers and the first and second lock plates. Fig. 9 is an explanatory diagram of the operation of Fig. 8, Fig. 10 is a configuration diagram showing the locking mechanism of the PLAY (R) operating lever, and Figs. 11a and b are explanatory diagrams of the operation of the lock mechanism, respectively. 12a and 12b are a configuration diagram and an explanatory diagram showing a conventional lock mechanism, respectively, FIG. 13 is an exploded perspective view showing the meshing state of gears in the forward/reverse switching mechanism shown in FIG. 4, and FIG. 14 is an exploded perspective view of the same. A configuration diagram showing a means for determining the meshing position of a gear, FIGS. 15a to 15c are perspective views showing modified examples of the positioning means of the same gear, and FIG. 16 is an exploded perspective view showing another example of the positioning means of the same gear. 17 is a configuration diagram showing the tape running drive mechanism, FIG. 18 is an explanatory diagram of the operation of the tape running drive mechanism, and FIG. 19 is an embodiment of the tape running stop detection mechanism of the tape recorder according to the present invention. Figure 20 is a configuration diagram showing the ASO mechanism, and Figure 20 is a side sectional view showing an enlarged view of the main parts of the ASO mechanism.
21 to 24 are explanatory diagrams of the operation of the ASO mechanism, FIG. 25 is a configuration diagram showing the conventional ASO mechanism, FIG. 26 is an explanatory diagram showing the principle of the ASO mechanism shown in FIG. 19, and FIG. Figure 27 is a configuration diagram showing the operation lever for auto reverse number limit and manual reverse, Figure 28 is an explanatory diagram of the operation of the same operation lever, Figure 29 is a configuration diagram showing the locking mechanism of the REC operation lever, Figure 30 and 31 is an explanatory diagram of the operation of the same lock mechanism, FIG. 32 is a configuration diagram showing another example of the same lock mechanism, and FIG. 33 is a high-speed tape traveling drive mechanism of the tape traveling drive mechanism shown in FIG. 17. Exploded perspective view showing the high speed lever, No. 34
The figure is an exploded perspective view illustrating the assembly of the high-speed lever, FIG. 35 is a configuration diagram showing a high-speed tape running drive mechanism using the same high-speed lever, and FIG. 36 is a configuration diagram showing a conventional high-speed tape running drive mechanism. 37 and 38 are an exploded perspective view and a side sectional view showing the fitted state of the high-speed drive lever and shaft of the tape high-speed traveling drive mechanism shown in FIG. 35, and FIGS. 39a and 39b, respectively.
40a and 40b are exploded perspective views and side sectional views showing the connected state of the high-speed drive lever and high-speed gear, respectively; FIGS. 40a and 40b are exploded perspective views and side sectional views showing the conventional connected state; FIG. FIG. 42 is an exploded perspective view showing how the flywheel bearing is attached to the sub-chassis; FIG. 43 is a side sectional view showing the relationship between the flywheel and the bearing; Figures 44a and 44b are explanatory diagrams of coaxial bearings, Figure 45 is a side sectional view showing the conventional flywheel bearing structure, and Figure 46 is a diagram illustrating the bearing structure of a conventional flywheel.
A configuration diagram showing the push mechanism of the PAUSE operator, Figures 47a and 47b are
48 is an explanatory diagram of the operation of the push mechanism, and FIGS. 49 a and 49 b are perspective views showing modified examples of the main parts of the push mechanism. , Fig. 50 is an exploded perspective view showing the state in which the ASO lever is supported by a leaf spring, Fig. 51 is an exploded perspective view showing the attachment of the leaf spring, Fig. 52 is an exploded perspective view showing the cassette lid lock slider, and Fig. 53 is an exploded perspective view showing the state in which the ASO lever is supported by a leaf spring. Figures a to c are side sectional views showing the attachment of the cassette lid lock slider, respectively. 1...Main chassis, 2 ...Operation unit, 3...
Head slider, 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... Cassette lid lock slider, 17... Column body, 18
...Sub chassis, 19,20...Flywheel, 211,212...Bearing, 22 ...Tape running drive mechanism, 23 ...REC lock mechanism, 24
...ASO mechanism, 25 ...Left playback slider, 26
... Right playback slider, 27 ... Reverse drive lever, 28 ... Gear, 29 ... Lock lever, 30
... Control slider, 31 ... Drive slider, 32
...Erasing head, 33...Head support, 34...
...Head mounting structure, 35...Head base plate, 36...
...Gear, 37...Fan gear, 38...Tape, 3
9...Connection line, 40...Arrow, 41...Torsion spring, 42...PLAY(R) operation lever,
43...PLAY(F) operating lever, 44...first lock plate, 45...second lock plate, 46...lock member, 47...first gear, 48...second gear, 491... recess, 492... step, 493...
...Groove, 501...Left winding gear, 502...Right winding gear, 51...Left winding lever, 52...Right winding lever, 531, 532...Pinch lever, 54...
...High speed drive lever, 55...High speed operation lever, 5
6...REW operating lever, 57...FF operating lever, 58...high speed slider, 59...ASO lever, 60...detection lever, 61...release lever,
62...ASO select lever, 64...plate spring,
65... REC stop lever, 66... REC control lever, 67... switch lever, 68...
REC operation lever, 75...PAUSE operation lever,
76...PAUSE lock member, 77...plate spring,
78...Movable part, 79...Fitting part.

Claims (1)

[Claims] 1 A first rotating body that rotates in conjunction with tape running, and a first rotating body that is provided coaxially with the first rotating body.
A friction member that rotates integrally with the rotating body with a predetermined friction force, and a first engaging portion that engages with one end of the friction member, and is rotatably supported in the center. and has a second engaging part that comes into contact with the circumferential surface of an eccentric cam part of a second rotating body that rotates irrespective of tape running, and one end of the friction member is engaged with the first engaging part. and a third engaging portion with which the other end of the friction member engages. One end is rotatably connected to one tip of the control lever, and the other end is rotatably supported, so that when the other end of the friction member presses the third engaging portion, the control lever a detection lever that brings a second engaging portion into pressure contact with the eccentric cam portion and swings the control lever; a fourth engaging portion of the control lever that stops at the outermost circumferential position of the cam portion, and detects the stoppage of tape running by moving the control lever to a position outside the range of the swinging motion; and a distance a from the rotation center of the control lever to the connection part with the detection lever, and a distance b from the rotation center of the detection lever to the connection part with the control lever. and the distance c from the center of rotation of the control lever to the first engaging portion is approximately equal to the distance d from the center of rotation of the detection lever to the third engaging portion. A tape running stop detection mechanism for a tape recorder, characterized in that: