JPH0210587Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] This idea is about improving the tape end detection mechanism.
Ru. [Technical background of the invention] As is well known, for tape recorders,
the tape in the specified running state (recording, playback, fast forward, winding).
(returning, etc.) and various operations to bring the vehicle to a stopped state.
The child should be able to be operated lightly and easily.
In addition, so-called soft-touch operation has been implemented.
There is. As a means of performing this soft touch operation,
Conventionally, various configurations have been considered. example
For example, if the desired control cannot be reached to the correct operating position.
If you move it slightly in the direction of operation, the control movement motor will move.
The switch for rotating the motor is turned on, and the motor
The rotational force of the controller moves the controller to its normal operating position.
There is something that can be moved by Also, the theme
Place the precoder in the specified operating state or stop state.
The multiple controls are arranged in a touch switch structure, and the
Solenoid using LSI etc. exclusively for precoder control
The tape recorder mechanism section controls the plunger etc.
The various movable parts of the
so that it moves to the position where it is activated or stopped.
There are so-called logic-oriented products. [Problems with background technology] By the way, the tape recorder software mentioned above
The touch control method is still in the development stage.
This floor has various problems. For example, the operation
For those that use a sub-movement motor,
Each must be equipped with a switch, motor, etc.
The configuration is extremely complex and large, and
In addition, solenoid plungers are used for logic-oriented devices.
Since it uses a battery, it consumes a lot of electricity, so it is not suitable for portable devices that use batteries.
It may be unsuitable for band tape recorders, etc.
Ru. Therefore, conventionally, we
In terms of cost and maintenance such as preventing malfunction,
We pay close attention to detail to fully meet the needs of users.
There is a strong need for further development. [Purpose of invention] This idea was made based on the above circumstances.
With this, you can run the tape from a stopped state with a simple configuration.
This prevents malfunctions when starting the
Extremely good end-of-tape detection for reliable operation
The purpose is to provide an output mechanism. [Summary of the idea] That is, this invention has a cam part and a release part.
A first rotating body that rotates independently of tape running.
and a second rotation that rotates in conjunction with tape running.
in one direction by the rotational force of the body and this second rotating body.
is biased by and slides into contact with the cam portion of the first rotating body.
The rotation of the second rotating body is stopped.
When the first rotating body is stopped, the swinging is stopped and the first rotating body is released.
a detection member that is engaged with and moved by the detection member;
The release member that moves in conjunction with the material and the tape running
The operating controls can be locked in the operating position and the
With the release member moved, the tape running operation is performed.
Lock mechanism that releases the lock at the operation position of the handle
and the tape running operator is in the non-operating position.
state, the detection member is in contact with the release member.
Biasing force in the direction of pressure contact with the cam part of the first rotating body
and a biasing member that provides the tape running operator.
The release member is separated from the detection member in conjunction with the operation.
and a control member.
It is. [Example of idea] Below, please refer to the drawings for an example of this invention.
A detailed explanation will be given below. In other words, Figure 1 shows this
Overall cassette tape recorder to which the invention was applied
FIG. First, 11 is a synthesis
The main shear is made of resin material and is shaped like a rectangle.
It is shi. And this diagram of main chassis 11
The control unit is installed in the middle right part.12So hot
From the top in Figure 1, press the REW operator 12 for rewinding.
a. FF controller 12b for fast forwarding, FF controller 12b for playback
PLAY operator 12c, REC operator 12 for recording
d. PAUSE operator 12 for pause
e. STOP operator 12 for stop and eject
They are arranged in the order of f, and each
Pressing operation in a direction substantially perpendicular to the plane of the chassis 11
It is supported in a way that allows it to be freely created and returned to. this
Each of the operators 12a to 12f is connected to the main chassis.
The lock mechanism described later on the back side in Figure 1 of 1113
(See Figure 2) and push in by pressing operation.
It is made to be locked in the state. However, above
The STOP control 12f will not be locked.
other controls 12a to 12 that are in the locked state.
The above locking mechanism13engage with
Ru. In addition, the PAUSE operator 12e is a lock button.
mechanism13operates independently without any interaction with
It is located on the back of the main chassis 11 in Figure 1.
A known pushup (not shown) placed on the surface side
Engages with the locking mechanism and operates with the first press operation.
For example, if the playback state is temporarily stopped, the
At the same time as pressing the button a second time, it locks.
The state is canceled and the state is returned to the playback state, for example.
This is how it functions. In addition, the above REW and FF operators 12a and 12b
is the high-speed traveling mechanism described later.14drive the table.
The machine allows the tape to run in rewind and fast forward mode.
function. Furthermore, the PLAY operator 12c is
Constant speed traveling mechanism described15(See Figure 2)
The function is to run the tape in the playing state.
Ru. In addition, the REC operator 12d is operated at the constant speed.
Traveling mechanism15In addition to driving the
-Switch the recorder circuit to recording mode and record the tape.
It functions as if it were to run in a recording state,
It is necessary to operate it together with the aforementioned PLAY operator 12c.
The recording state can be entered by operating the unit independently.
It is something that can be done. Here, of the main chassis 11, the
Operation section12In the upper part of Figure 1, there is an adjustment lever.
-16 is provided. This Ijieku lever
16 has its approximately central portion protruding into the main chassis 11.
It is fitted onto a rotary shaft 161 provided and rotatably supported.
held. And this Ijieku Lever 1
6 has a through hole 162 formed at one end thereof and a metal
Between the protrusion 163 formed on the in-sheath 11
A coiled spring 164 is attached to the
Although it is biased counterclockwise in Fig. 1 by
The rotation is controlled by one end of the eject lever 16.
It hits the locking piece 165 formed on the in-sheath 11.
It is done until they touch each other. In addition, the above
At the other end of the bar 16, a cassette lid (not shown) is attached.
The cassette lid is closed by engaging with the formed locking part.
A locking portion 166 is formed to hold it in position.
Ru. The eject lever 16 is
REW, FF, PLAY, REC operators 12a to 12
When d is not operated, press STOP control 12f.
When you operate , it will be linked to the operation of the STOP control 12f.
The second spring moves against the biasing force of the spring 164.
The lock part 16 is rotated clockwise in Figure 1.
6 is released from the locking part of the cassette lid and the cassette is removed.
This functions to open the lid. Next, at the approximate center of the main chassis 11,
, the left and right reel shafts 17 and 18 rotate respectively.
freely supported. These left and right reel axes
17 and 18 are coaxially connected with gears 19 and 2, respectively.
0 is provided, and the left and right reel shafts 17, 1
8 and gears 19 and 20 each rotate integrally.
It has been made possible. And the gear 1
9, 20, the high speed traveling mechanism14to act
, the left and right reel shafts 17 and 18 respectively
It is rotated according to the rewinding and fast forwarding status.
This is what happens. In addition, the left reel shaft 17 and the right reel shaft 18
Approximately in the middle of the
21 is rotatably supported. This driving gear
21 is a first gear 211 with a large diameter and a second gear 211 with a small diameter.
The gear 212 is coaxially and integrally formed.
For example, the rotational force of a motor (not shown) is
It is transmitted through the left and right reel stands.
17 and 18 have rotational power that supports high-speed and constant-speed running.
It has become a driving source that provides Furthermore, below the right reel shaft 18 in FIG.
The capstan 22 is rotatably supported.
Ru. This capstan 22 is the main chassis 1
The flag (not shown) installed on the back side in Figure 1 of 1
This is the axis of rotation of the wheel.
For example, the rotational force from the above motor is applied to the flywheel.
For example, it is transmitted via a belt or the like. and,
The capstan 22 includes the constant speed traveling mechanism.1
5, the pinch roller 23 approaches and separates. This pinch roller 23 is rotatably supported by a pinch lever 24 whose one end is rotatably supported by a rotating shaft 241 protruding from the main chassis 11. When the lever 24 is rotated in conjunction with the operation of the constant speed traveling mechanism 15 , it is brought into contact with and separated from the capstan 22. Further, an erroneous erasure prevention claw detection lever 25 is provided at the upper left side of the main chassis 11 in FIG. Here, FIG. 2 remains in the state shown in FIG. 1,
Main chassis 1 by looking through main chassis 11
FIG. 1 is a configuration diagram showing the back side of FIG. That is, in addition to the lock mechanism 13 , constant speed running mechanism 15, etc., an automatic stop mechanism (hereinafter referred to as ASO mechanism) 26, which will be described later in connection with the right reel shaft 18, is installed.
is installed. In addition, the above REC operator 12
A substantially L-shaped erroneous erasure prevention lever 27 whose one end engages with d is rotatably supported at its corner by a rotation shaft 271 protruding from the main chassis 11. One end of a transmission lever 28 is connected to the other end of the erroneous erasure prevention lever 27 . The other end of the transmission lever 28 is connected to one end of an erroneous erasure prevention detection lever 29 whose substantially central portion is rotatably supported by a rotation shaft 291 protruding from the main chassis 11. . The other end of this erroneous erasure prevention detection lever 29 can be engaged with the erroneous erasure prevention claw detection lever 25 . Then, when the REC operator 12d is pressed,
In conjunction with this operation, the accidental erasure prevention lever 27 moves to the second position.
It is rotated counterclockwise in the figure. Therefore, the erroneous erasure prevention detection lever 29 is rotated counterclockwise in FIG. 2 via the transmission lever 28. At this time, if the accidental erasure prevention claw of the tape cassette (not shown) has not been broken off, that is, if it is in a recordable state,
Since the erroneous erasure prevention claw detection lever 25 is pushed away by the erroneous erasure prevention claw of the tape cassette, the erroneous erasure prevention claw detection lever 25 is placed in a position where it does not face the other end of the erroneous erasure prevention detection lever 29.
The accidental erasure prevention detection lever 29 can be sufficiently rotated counterclockwise in FIG.
d is locked in the operating position. Also,
If the accidental erasure prevention claw of the tape cassette is broken off, that is, if recording is not possible, the accidental erasure prevention claw detection lever 25 is placed in a position opposite to the accidental erasure prevention detection lever 29, and the accidental erasure prevention detection is performed. Since the lever 29 is prevented from rotating, the result is
The REC operator 12d cannot be operated, and accidental erasing is prevented here. Next, a gear 30 is provided on the capstan 22 so as to rotate coaxially and integrally with the capstan 22. And this gear 3
0, a constant speed running gear 31, a high speed running gear 32, and a pause gear 33, which can mesh with the gear 30, are rotatably supported. Each of the gears 31 to 33 is partially formed with a notch (not shown) to prevent it from meshing with the gear 30, and in a normal stopped state, each of the gears 31 to 33 has a notch. The portions face the gears 30, and even when the gears 30 rotate, each gear 31
33 are arranged so as not to be rotated. Then, PLAY or REC operators 12c, 12d
When the constant speed running gear 31 is operated, the gear 3
0 and is rotated, and its rotational force drives the constant speed running mechanism 15 , so that the tape is run in a reproducing or recording state. Also, the REW or FF controls 12a, 12b
When the high-speed running gear 32 is operated, the gear 3
The high-speed running mechanism 14 is driven by the rotational force of the tape, and the tape is run in a rewinding or fast-forwarding state. Further, when the PAUSE operator 12e is operated, the pause gear 33 is engaged with the gear 30 and rotated, and a pause mechanism 34 , which will be described later, provided at the lower right side of the main chassis 11 in FIG. 2 is driven, and the tape is rotated. It will be in a suspended state. The overall structure of the cassette tape recorder described here has been explained above, and the detailed structure and operation of each part will be explained below. Third
The figure shows the locking mechanism 13 . That is, PLAY, REW and FF operators 12c, 12
a and 12b can be pressed in the direction of arrow A in FIG. 3, and are biased in the direction of return by a spring (not shown) in the direction of arrow B. And the above PLAY, REW and FF controls 1
A lock plate 35 is supported so as to be slidable in the directions of arrows C and D in FIG. Further, this lock plate 35 is biased in the direction of arrow D by a spring (not shown). Here, the above PLAY, REW and FF operators 12
Lock portions 131 to 133 having the shapes shown in the figure are formed on each side of the lock portions 12a and 12b. Further, on one side of the lock plate 35, the above-mentioned
PLAY, REW and FF controls 12c, 12a, 1
Engaging portions 351 to 353 are formed to engage with the lock portions 131 to 133 of 2b, respectively.
The engaging portions 351 to 3 of the lock plate 35
53 is for the lock parts 131 to 133,
PLAY, REW and FF controls 12c, 12a, 1
2b's operation direction (arrow A direction) and the return direction (arrow B direction).
The locking portions 357 to 359 are respectively formed by biting into the locking direction. Therefore, if, for example, the PLAY operator 12c is pressed in the direction of arrow A in FIG.
The lock part 131 of 2c is the inclined part 3 of the lock plate 35.
54, and the lock plate 35 is slid in the direction of arrow C. When the lock portion 131 passes over the top of the inclined portion 354, the lock plate 35 is slid in the direction of arrow D, as shown in FIG.
The lock portion 131 of the PLAY operator 12c is engaged with the locking portion 357 of the lock plate 35, and is locked in the operating position. PLAY operator 1 like this
2c, for example, the STOP operator 12
When f is operated or the ASO mechanism 26 is operated, the lock plate 35 is forcibly slid in the direction of arrow C in FIG. is returned to its original position. In addition, the locking and unlocking operations of the controls as described above are performed using REW.
and FF controls 12a and 12b can be explained in the same way, and although not shown in FIG. Therefore, their explanation will be omitted here. Here, as is clear from FIG. 3, the depth of engagement S ₁ between the lock portion 131 of the PLAY operator 12c and the locking portion 357 of the lock plate 35 is greater than the engagement depth S1 between the lock portion 131 of the PLAY operator 12c and the locking portion 357 of the lock plate 35. , 133 and the locking portions 358, 359 of the lock plate 35
The depth is set to be deeper than S ₂ , but the reason for this is that it is necessary to perform the autoplay operation described later, and the details will be described later. Next, the high speed traveling mechanism 14 will be explained. That is, as shown in FIG. 4, the high-speed running gear 32 is formed with a notch 321 that does not mesh with the gear 30 of the capstan 22. This high-speed running gear 32 has a substantially ring-shaped guide structure 322 along the circumference on one side thereof.
is formed. A recess 324 having the shape shown in the figure is formed in a part of the inner circumferential side wall 323 of the guide groove 322. The recess 324 is recessed toward the rotation center of the high-speed running gear 32. And the above-mentioned high-speed running gear 3
2 is finally rotated clockwise in FIG.
The gear 32 is meshed with the gear 30 which is rotated counterclockwise in the figure, and the wall surface of the recess 324 that is the rear end with respect to the rotation direction (clockwise in Figure 4) at this time is , a first portion 325 substantially perpendicular to the rotational direction and a second portion 326 connected to the inner peripheral side wall 323 at an angle with respect to the rotational direction are continuously formed. be. Further, a protrusion 3 is provided in a portion of the outer peripheral side wall 327 of the guide groove 322 that faces the recess 324.
28 is formed. Here, the guide groove 32 of the high-speed running gear 32 is
An engaging protrusion 361 that protrudes from one end of a substantially L-shaped high-speed lock lever 36 is loosely fitted into the lock lever 2 . The engagement protrusion 361 is formed into a generally fan-like shape, with a flat portion facing the bottom of the recess 324 and the first portion 325 of the guide groove 322, and a curved portion facing the protrusion 328. There is. The high-speed lock lever 36 has a long hole 362 extending vertically in FIG.
is formed, and a rotation shaft 363 protruding from the main chassis 11 is loosely fitted into the long hole 362 to be rotatably supported. Also,
The other end of the high-speed lock lever 36 is connected to the REW
and an engaging portion 364 that engages with the FF operators 12a and 12b. Figure 5 shows the high speed lock lever 36 and REW.
This shows the engagement relationship with the operator 12a. That is, on the upper side of the REW operator 12a in FIG.
An engaging portion 364 of the high speed lock lever 36 is located there. A side portion of the REW operator 12a facing the engaging portion 364 is provided with an engaging portion 364 of the high-speed lock lever 36 when the REW operator 12a is pressed in the direction of arrow A in FIG. A sloped portion 365 is formed that can be moved in the direction of arrow C in FIG. 5, that is, can rotate the high-speed lock lever 36 counterclockwise in FIG. Here, the high-speed lock lever 36 has an engaging portion 364 that can be moved in the direction of arrow D in FIG.
A biasing force for rotating clockwise in the figure is provided by a spring (not shown). The high-speed lock lever 36 is rotated clockwise in FIG. 4 by this spring until the engaging protrusion 361 abuts the bottom of the recess 324 of the high-speed running gear 32. As shown in FIG.
5, the high-speed running gear 32 has its notch 321 facing the gear 30 of the capstan 22, and is prevented from rotating. Now, from the state shown in FIG. 5, press the REW operator 12a in the direction of arrow A to lock the lock portion 132 on the lock plate 3, as shown in FIG.
When the high-speed lock lever 36 is locked into the engaging portion 352 of the REW operator 1, the engaging portion 364 of the high-speed lock lever 36
Since it is moved by the inclined portion 365 of 2a in the direction of arrow C in FIG. 6 against the biasing force of the spring, it is eventually rotated counterclockwise as shown in FIG. Then, the engagement protrusion 361 of the high-speed lock lever 36 separates from the bottom of the recess 324 and the first portion 325 of the high-speed running gear 32, and the engagement protrusion 3
The curved portion 61 presses the protrusion 328 of the high-speed running gear 32. For this reason, the high-speed running gear 3
2 is rotated slightly clockwise in FIG.
is engaged with. In this way, the high-speed running gear 32 is rotated clockwise in FIG. 7 by the rotational force of the gear 30. Then, as shown in FIG.
8 is in contact with the engagement protrusion 361 of the high-speed lock lever 36, its notch 321 is in a position facing the gear 30, and rotation is stopped. here,
The high-speed running gear 32 moves from the position shown in FIG.
The high-speed traveling mechanism 14 is driven as described below by the rotational force that makes approximately one rotation to the position shown in the figure, and in this case, the tape is in the tape rewinding state. Furthermore, since the REW operator 12a is locked at the operating position, as is clear from FIG.
The high-speed lock lever 36 is defined at the position shown in FIG. 8, and the high-speed travel gear 32 is in the state shown in FIG. Since the protrusion 328 is biased clockwise in the figure, the engagement protrusion 36
1, the high-speed running gear 32 and the high-speed lock lever 36 end up in the tape rewinding state.
is stable at the position shown in FIG. For example, in the tape rewinding state as described above,
When the STOP operator 12f is operated and the REW operator 12a is returned to its original position as shown in FIG. 5, the high speed lock lever 36 is moved from the position shown in FIG. It is rotated clockwise by the force and returns to the position shown in FIG. 4, at which time the high-speed running mechanism 14 is brought into a non-driving state and tape running is stopped. Note that although the above description has been made regarding the operation when the REW operator 12a is operated, this can be similarly explained when the FF operator 12b is operated. That is, the engagement relationship between the FF operation element 12b and the engagement portion 364 of the high-speed lock lever 36 is also the same as the fifth one.
The configuration is similar to that shown in the figure, and when the FF operator 12b is operated with the high-speed lock lever 36 in the position shown in FIG. 4, the high-speed lock lever 36 will be in the state shown in FIG. 7. Then, the high-speed running gear 32 rotates approximately one rotation to reach the state shown in FIG. 8, thereby driving the high-speed running mechanism 14, and in this case, the tape is brought into a fast-forwarding state. Further, when the STOP operator 12f is operated, the high-speed lock lever 36 is returned from the position shown in FIG. 8 to the position shown in FIG. 4, and tape running is stopped. That is, the high-speed running gear 32 is REW
In conjunction with the operation of tape high-speed running operators such as the FF operators 12a and 12b, the high-speed running mechanism 14 is driven by approximately one rotation. Here, the guide groove 32 of the high-speed running gear 32 is
As shown in FIG. 9, an inner cam 37 is formed on the surface opposite to the surface on which 2 is formed. The inner cam 37 has a cam portion 372 whose inner wall 371 is formed by sequentially changing the diameter in a substantially spiral shape around the rotation center of the high-speed running gear 32, and a cam portion 372 that is formed by changing the diameter of the inner wall 371 in a substantially spiral shape around the rotation center of the high-speed running gear 32, and a cam portion 372 that has both ends of the cam portion 372 at a radius of the gear 32. It consists of a release part 373 that connects in the direction. and,
The cam portion 372 is the ninth cam portion of the high-speed running gear 32.
When rotated clockwise in the figure, the leading portion is formed in a spiral shape with a larger diameter than the trailing portion. Here, a protrusion 381 formed at one end of the high-speed drive lever 38 is loosely fitted into the inner cam 37 . This high-speed drive lever 38 is rotatably supported by having its substantially central portion fitted into a rotation shaft 382 protruding from the main chassis 11 . Although the high-speed drive lever 38 shown in FIG. 9 is shown in a simplified form for convenience compared to the actual high-speed drive lever described later, they are functionally completely equivalent, and the actual high-speed drive lever shown in the following drawings is also shown in a simplified manner. Identical parts will be indicated with the same symbols. The high-speed drive lever 38 is biased counterclockwise in FIG. 9 by a spring (not shown), but its rotation is limited until the protrusion 381 comes into contact with the peripheral wall 371 of the inner cam 37. being done. Further, the protrusion 381 of the high-speed drive lever 38
is the engagement protrusion 361 of the high-speed lock lever 36.
is in contact with the bottom of the recess 324 and the first portion 325 as shown in FIG. It is located in the central part. As mentioned above, when the high-speed running gear 32 meshes with the gear 30 and rotates clockwise in FIG. Since it is sequentially pressed against the biasing force of the spring, it is eventually rotated clockwise in FIG. In this way, the high-speed running gear 3
2 rotates approximately one rotation, and as shown in FIG.
When the high-speed drive lever 38 comes into contact with the release part 373, the protrusion 381 of the high-speed drive lever 38 is at the position closest to the release part 373 in the small diameter part of the cam part 372 of the inner cam 37, that is, the ninth position.
It is located in the middle of the figure, and is held in the most rotated state in the clockwise direction in Figure 9. At this time,
Since a biasing force is applied to the high-speed drive lever 38 in the counterclockwise direction in FIG. 9, its protrusion 381 presses the cam portion 372 in the middle portion of FIG. Therefore, the high-speed running gear 32 is biased clockwise in FIG.
In the state shown in the figure, the protrusion 328 of the high-speed running gear 32 is pressed against the engagement protrusion 361 of the high-speed lock lever 36. Here, when the high-speed lock lever 36 rotates clockwise from the state shown in FIG. 8 to the state shown in FIG. In the state where it is separated from the section 328, the high-speed running gear 32 is moved as shown in FIG. rotated clockwise. For this reason,
The protrusion 381 of the high-speed drive lever 38 is moved from the middle part to the middle part of FIG. 9, and the high-speed drive lever 38 is returned to its original position. At this time, the engaging protrusion 361 of the high-speed lock lever 36 instantly
enters into the bottom of the recess 324 of the high-speed running gear 32, so the rotation of the high-speed running gear 32 in the clockwise direction in FIG. 9 due to the biasing force of the high-speed drive lever 38 is as shown in FIG. , the engagement protrusion 361 of the high-speed lock lever 36 is prevented from coming into contact with the first portion 325, and returns to its original state. Here, at the end of the high-speed drive lever 38 opposite to the side where the protrusion 381 is formed,
As shown in FIG. 10, a notch 383 is formed in a substantially rectangular shape from the bottom to the top in the figure.
In this notch 383, a substantially cylindrical protrusion 3 protruding from one end of the high-speed switching lever 39 is provided.
91 is loosely fitted. Here, at the end of the high-speed drive lever 38 where the notch 383 is formed, a substantially cylindrical projection 384 and a locking piece 385 are formed above the projection 384 in FIG. 10, respectively. One end of the protrusion 391 of the high-speed switching lever 39 is engaged with the locking piece 385 of the high-speed drive lever 38, and the other end is engaged with the protrusion 385 of the high-speed drive lever 38.
10 and is held by a torsion spring 386 which is wound around 4 and engaged with the protrusion 391. Here, the high-speed switching lever 39 has a long hole 392 formed in its longitudinal direction. and,
A protrusion 401 protruding from one end of the high-speed switching slider 40 is loosely fitted into the elongated hole 392 .
This high-speed switching slider 40 is installed approximately parallel to the high-speed drive lever 38, and has a protrusion 403 protruding from the main chassis 11 in a long hole 402 formed in the longitudinal direction approximately at the center thereof. By being loosely fitted, it is supported so as to be slidable in the directions of arrows E and F in FIG. Further, on the upper side of the high-speed switching slider 40 in FIG.
A cut and raised piece 404 having a substantially T-shape from the front as shown in the figure is formed. A protrusion 406 having a substantially cylindrical shape and having a flange 405 at the top is protrudingly provided on the main chassis 11 facing the cut and raised piece 404 . Further, on the main chassis 11 between the cut and raised piece 404 of the high-speed switching slider 40 and the protrusion 406, a cut and raised piece 407 having substantially the same shape as the above-mentioned cut and raised piece 404 is formed. The cut-and-raised pieces 407,
Both sides of the base of 404 are sandwiched. Therefore, normally, the high-speed switching slider 40 is at the neutral position (the position shown in FIG. 10) at the positions of both ends of the torsion spring 408 defined by the cut and raised pieces 407.
is held in Further, the protrusion 401 of the high-speed switching slider 40
The end opposite to the side where the
It extends to a position facing the REW and FF operators 12a and 12b, and a bending control piece 41 is formed on the side thereof, as shown in FIG. 11.
As shown in FIG. 12a, this bending control piece 41 is
Slanted portions 411 and 412 are formed on both sides thereof. And, on both inclined parts 411 and 412,
The tips of the REW and FF operators 12a and 12b are opposed to each other. Here, as shown in FIG. 12b, FF operator 1
2b in the direction of arrow A in the figure, its tip presses the inclined part 412 of the bending control piece 41, and the high-speed switching slider 40 is moved by the torsion spring 408.
It is slid in the direction of arrow F in the figure against the urging force of. Further, as shown in FIG. 12c, when the REW operator 12a is operated in the direction of arrow A in the figure, its tip presses the inclined part 411 of the bending control piece 41,
The high-speed switching slider 40 is a torsion spring 4
It is slid in the direction of arrow E in the figure against the urging force of 08. Here, first, as shown in FIG. 12b, it is assumed that the FF operator 12b is operated and the high-speed switching slider 40 is slid in the direction of arrow F in the figure. Then, as shown in FIG. 13a, the high-speed switching lever 39 is moved slightly from the position previously shown in FIG. 10 around the protrusion 391 by the protrusion 401 of the high-speed switching slider 40 as shown in FIG. 13a. Rotated counterclockwise. Also, at this time, the FF operator 12b
As explained above in FIGS. 7 to 9, as shown in FIG. 13b,
The high-speed drive lever 38 is rotated clockwise in the figure. Therefore, the protrusion 391 of the high-speed switching lever 39 is pressed by the torsion spring 386, and the high-speed switching lever 39 moves onto the high-speed switching slider 4.
It is rotated counterclockwise around the protrusion 401 of 0 while being moved upward in FIG. 13b. By setting the high-speed switching lever 39 to the position shown in FIG. 13b, the high-speed transmission mechanism described later is controlled to a state corresponding to the tape fast-forwarding state. Further, as shown in FIG. 12c, it is assumed that the REW operator 12a is operated and the high-speed switching slider 40 is slid in the direction of arrow E in the figure. Then,
As shown in FIG. 14a, the high speed switching slider 40
By the protrusion 401, the high-speed drive lever 39 is rotated slightly clockwise in FIG. 14a from the position previously shown in FIG. 10 about the protrusion 391. Also,
At this time, as the REW operator 12a is operated, the high-speed drive lever 38 rotates clockwise in the figure, as shown in FIG. 14b, as previously explained in FIGS. 7 to 9. be done. Therefore, the projection 391 of the high-speed switching lever 39 is pressed by the torsion spring 386, and the high-speed switching lever 39 is pushed up substantially upward in FIG. 14b.
By setting the high-speed switching lever 39 to the position shown in FIG. 14b, the high-speed transmission mechanism is controlled to a state corresponding to the tape rewinding state. Here, the protrusion 391 of the high speed switching lever 39
As shown in FIG. 15, three flat surfaces 393 to 395 are formed in the portion facing the torsion spring 386. When the high-speed switching lever 39 is in the neutral state shown in FIG. 10, the central oblique surface 394 is in contact with the torsion spring 386 as shown in FIG. 16a, and as shown in FIGS. 13b and 14b. In the state shown in FIG. 16b and c, the oblique plane 3
93 and 395 are torsion springs 3 respectively
86, so that the high-speed switching lever 39 is stabilized in the positions shown in FIG. 10, FIG. 13b, and FIG. 14b, respectively. Next, the high-speed transmission mechanism will be explained. That is, as shown in FIG. 17, between the left and right reel shafts 17 and 18, there is a high speed lever 42 having the shape shown in the figure.
is provided. This high-speed lever 42
As shown in FIG. 8, a pin 421 protruding from the approximate center thereof is rotatably supported by being loosely fitted into a long hole 422 formed in the main chassis 11. A small-diameter gear 43 is located approximately at the center of the high-speed lever 42 and at the lower middle portion of FIG.
and a large-diameter gear 44 are each rotatably supported. Although the gear 44 is not visible in the figure, it is formed by two gears having approximately the same diameter so as to rotate coaxially and integrally. One of the gears 44 and the gear 43 are always in mesh with each other. Further, the other gear of the gears 44 is connected to the first gear 211 of the drive gear 21 when the high speed lever 42 is rotated counterclockwise in FIG.
and the gear 20 of the right reel shaft 18, and when the high speed lever 42 is rotated clockwise in FIG. 17, it is meshed with the gear 19 of the left reel shaft 17. Furthermore, the gear 43 is
When the high-speed lever 42 is rotated clockwise in FIG. 17, it meshes with the first gear 211 of the drive gear 21. Note that the gear 44
Of the two gears, the one that meshes with the gear 43 has fewer teeth than the other gears. Here, a curved portion 423 bent into a substantially U-shape is formed at the upper portion of the high-speed lever 42 in FIG. 17. The tip end 424 of this curved portion 423 faces the upper end of the high speed switching lever 39 in FIG. 10 when the high speed drive lever 38 is in the stopped state shown in FIG. Further, in FIG. 17, a control portion 426 extending from the lower part of the high-speed lever 42 in the drawing is approximately L-shaped and is engaged with a pin 425 protruding from approximately the center of the high-speed drive lever 38. ing. The high speed lever 42 is the 18th high speed lever 42.
As shown in the figure, a coiled spring 42 is inserted between a pin 427 protruding from the curved portion 423 and a through hole 428 formed in the main chassis 11.
9 is engaged, it is biased counterclockwise in FIG. 16. By the way, the spring 4 of the high speed lever 42
29, when the high-speed drive lever 38 is in the stopped state shown in FIG.
It is made to the position where it abuts the pin 425 of. When the high speed lever 42 is in this position, the gears 43 and 44 are the first gear 211 of the drive gear 21 and the gear 1 of the left and right reel shafts 17 and 18.
9 and 20 so as not to mesh with either of them. If the FF operator 12b is operated in such a state, as the high-speed drive lever 38 is moved to the position shown in FIG. pin 4
25 is detached from the tip portion 426a, and the control portion 4
26 is moved inward. At this time, the high speed switching lever 39 is rotated counterclockwise in FIG. Therefore, the high-speed lever 42 is rotated counterclockwise in FIG. 17 by the biasing force of the spring 427, as shown in FIG. 17, with its control portion 426 holding the pin 425. Therefore, of the gears 44, the gear meshed with the gear 43 is the first gear 21 of the drive gear 21.
1, and the other gear meshes with the gear 20 of the right reel shaft 18. The drive gear 21 is rotationally driven in the counterclockwise direction in FIG.
The right reel shaft 18 is rotated counterclockwise in FIG. 16, and fast forwarding of the tape is performed. Furthermore, when the REW operator 12a is operated, the high-speed switching lever 39 is moved upward in FIG. 14b, so as shown in FIG. recess 3
96 presses the tip end 424 of the high speed lever 42 and rotates the high speed lever 42 clockwise in FIG. Therefore, the gear 43 is meshed with the first gear 211 of the drive gear 21, and the other gear of the gear 44 is meshed with the gear 19 of the left reel shaft 17. The rotational force of the driving gear 21 rotated counterclockwise in FIG.
9 to the left reel shaft 17, the left reel shaft 17 is rotated clockwise in FIG. 19, and tape rewinding is performed here. Therefore, according to the high-speed traveling mechanism 14 as described above, first, as explained in FIG.
Alternatively, the engagement protrusion 361 of the high-speed lock lever 36, which is rotated counterclockwise in FIG.
By pressing the protrusion 328, the high-speed running gear 32 is rotated clockwise in FIG. A bias mechanism for biasing rotation is not required, and the configuration is simplified. In other words, in this type of conventional mechanism, the high-speed gear is locked by a high-speed lock lever with its notch facing the gear of the capstan, and the high-speed gear is locked in one direction by a leaf spring or the like. A rotation biasing force is applied to the gear, and when the high-speed lock lever is unlocked (that is, when the tape high-speed running operator is operated), the high-speed running gear is slightly rotated by the biasing force of the leaf spring. It is designed to mesh with the capstan gear. For this reason, the above-mentioned leaf spring, its support, etc. are required, which complicates the structure. This results in various problems, such as an increase in the number of assembly steps and an increase in the size of the tape recorder. However, according to the high-speed traveling mechanism 14 as described above, since there is no need to apply any bias to the high-speed traveling gear 32, the structure is extremely simple and easy to assemble, and it is also suitable for downsizing the tape recorder. It is something to do. Further, the protrusion 328 and the like of the high-speed running gear 32 can also be easily formed by molding a synthetic resin material. Furthermore, by not using a bias mechanism such as a leaf spring as in the conventional case for the high-speed running gear 32, there are the following advantages. That is, when the motor does not rotate due to, for example, a power outage or a drop in battery power (the capstan 22 is in a stopped state),
When the REW or FF operators 12a, 12b are operated, the high-speed running gear 32 is in the state shown in FIG. 7 and is slightly engaged with the gear 30, but the STOP
If you operate the operator 12f, the high-speed lock lever 3
6 rotates clockwise in FIG.
Since the motor is rotated counterclockwise in the figure and returns to the stop position shown in Figure 4, no malfunction will occur even if the motor is rotated after a power outage is canceled or the battery is replaced. be. In this regard, with conventional bias mechanisms, for example, when the tape high-speed running control is operated during a power outage, the high-speed running gear is slightly engaged with the capstan gear due to the bias, but then the STOP control is operated. In this case, the tape high-speed running operator is returned to its original position, but the high-speed running gear does not return to its stop position. For this reason, when the power outage is canceled and the motor is rotated, a malfunction occurs in which the operator is at the stop position and the high-speed running gear is rotated. However, the above-mentioned configuration allows for extremely simple operation. This configuration allows for reliable prevention of malfunctions. In addition, when the tape is running at high speed, as explained in FIG.
2, the high-speed running gear 32 moves to the ninth position.
It is biased clockwise in the figure. And STOP
When the operator 12f is operated, as shown in FIG.
5 and prevents the high-speed running gear 32 from rotating due to the biasing force of the high-speed drive lever 38, thereby preventing malfunctions such as the high-speed running gear 32 rotating too much and meshing with the gear 30 again. This can be reliably prevented. Next, the high-speed lock lever 36 has a rotation shaft 363 loosely fitted into its elongated hole 362. Therefore, as shown in FIG. 20, when the high-speed running gear 32 and the gear 30 are completely meshed, the high-speed lock lever 36 has its rotation shaft 363 located at the upper part of its elongated hole 362 in FIG. ing.
Here, as shown in FIG. 21, the high-speed running gear 32 and the gear 30 do not mesh completely and the tips of the teeth contact each other, or the tips of the teeth contact each other when the gear 30 stops rotating due to a power outage or the like. Sometimes. In such a case, the rotation of the high-speed running gear 32 will be temporarily stopped, but the REW or FF operation
Since the high-speed lock levers 36a and 12b are being operated, the high-speed lock lever 36 is sufficiently rotated counterclockwise in FIG. 21, so that an unreasonable force is eventually applied to the high-speed lock lever 36. At this time, as shown in FIG. 21, the high-speed lock lever 36
62 provides an escape route, which can prevent damage to the high-speed lock lever 36 and the high-speed gear 32, and prevent the high-speed gear 32 and gear 3 from being damaged.
0 can be smoothly engaged and prevent malfunctions. In addition, by operating the FF or REW operators 12b and 12a, the high-speed switching lever 39 is switched to the high-speed switching lever 39 in FIG.
Although the amount of rotation to the position shown in FIG. 4a is small, by driving the high-speed drive lever 38, the protrusion 391 of the high-speed switching lever 39 approaches the protrusion 401 of the high-speed switching slider 40. As a result, the high-speed switching slider 39 can be sufficiently moved to the respective position as shown in FIG. 13b or 14b. In other words, REW and
Even if the operating strokes of the FF operators 12a and 12b are short, the final movement amount of the high-speed switching lever 39 can be increased, making it suitable for soft-touch operation, and the structure also allows for organic and reliable operation. It is something that can be done. Furthermore, as shown in Figure 12a, REW and
Since the tips of the FF controls 12a and 12b face the inclined parts 411 and 412 of the high-speed switching slider 40, respectively, the REW and FF controls 12a,
When the REW and FF operators 12b are operated together, their tips come into contact with the inclined parts 411 and 412, that is, they sandwich the bending control piece 41 of the high-speed switching slider 40, so that the REW and FF operators 12a and 12
In this case, it becomes impossible to perform both operations, and so-called double-pressing is prevented. Furthermore, as shown in Fig. 12b and c, when the FF and REW operators 12b and 12a are operated individually, the other
The REW and FF operators 12a and 12b are prevented from being operated by the bending control piece 41 to prevent malfunctions. Here, as shown in FIG. 18, the high speed lever 4
2, the pin 421 is loosely fitted into the elongated hole 422 of the main chassis 11. Therefore, as shown in FIG. 18, the high speed lever 42 is rotated and the gear 44 is rotated.
When is meshed with the gear 19 of the left reel shaft 17,
When the tooth tips of both gears 44, 19 come into contact with each other, the high-speed lever 42 is pushed up along the elongated hole 422 as shown in FIG. protected against. Next, the constant speed traveling mechanism 15 will be explained. That is, although the constant-speed running gear 31 previously shown in FIG. 2 is not shown, it is formed similarly to the high-speed running gear 32, except for its diameter. In other words, this gear 31 for constant speed running has a guide groove 32 on one side of the gear 32 for high speed running.
2. Recessed portion 324, first and second portions 325, 3
26, a protrusion 328, etc. are formed respectively, and an inner cam 37 and a cam portion 37 are formed on the other side.
2. A part corresponding to the release part 373 etc. is formed, and a part thereof has a notch part 32.
It is formed by forming the corresponding one.
An engaging protrusion 451 formed at one end of the constant speed lock lever 45 shown in FIG. 2 is loosely fitted into the guide groove of the constant speed running gear 31.
The constant speed lock lever 45 is rotatably supported by a rotation shaft 453 protruding from the main chassis 11 being loosely fitted into an elongated hole 452 formed approximately at the center thereof. Further, the other end of the constant speed lock lever 45 is formed with an engaging portion 454 that extends to the PLAY operator 12c side and engages with the PLAY operator 12c as shown in FIG. There is. That is, in FIG. 5, the PLAY operator 12
In the upper part of the figure c, when the PLAY operator 12c is operated in the direction of the arrow A in the figure, the engaging portion 454 of the upward constant speed lock lever 45 is moved in the direction of the arrow C in the figure, that is, in FIG. An inclined portion 455 is formed that allows the constant speed lock lever 45 to rotate counterclockwise in the figure. Then, as shown in Figure 6, PLAY
When the operator 12c is locked at the operating position, it is pressed by the inclined portion 455 and the constant speed lock lever 45
The engaging portion 454 of the constant speed lock lever 45 is moved in the direction of arrow C in FIG. It meshes with the gear 30 and is driven to rotate. Further, in FIG. 2, a substantially U-shaped constant speed lever 46 is provided at substantially the center of the main chassis 11. This constant speed lever 46 has a rotating shaft 4 whose upper portion in FIG. 2 projects from the main chassis 11.
61 and is rotatably supported. One arm of the constant speed lever 46 has a large diameter and is attached to the second gear 2 of the drive gear 21.
12 is rotatably supported. Further, the constant speed lever 46 is connected to a through hole 462 formed in the other arm portion of the main chassis 1.
A coiled spring 464 is engaged between the protrusion 463 protruding from the second
It is biased counterclockwise in the figure. The rotation of the constant speed lever 46 in the counterclockwise direction in FIG. This is done to the position where it engages with the Here, the constant speed running gear 31 has a 22nd
An inner cam 311 indicated by a dotted line in the figure is formed.
A constant speed drive lever 4 is installed inside this inner cam 311.
A pin 491 protruding from one end of 9 is loosely fitted. The constant speed drive lever 49 has a substantially L-shape, and its corner portion is fitted onto a rotation shaft 492 protruding from the main chassis 11, so that the constant speed drive lever 49 is rotatably supported. The upward constant speed drive lever 49 is
A torsion spring whose one end is locked to a locking piece 493 formed on one side thereof, and whose other end is locked to an engaging portion 494 formed on the main chassis 11 by winding the rotation shaft 492. 495, the pin 491 is biased clockwise in FIG.
11. Further, at one end of the constant speed drive lever 49,
A protrusion 496 is formed. The protruding portion 496 is wound around the extending portion 242 protruding from the tip of the pinch lever 24 and the rotating shaft 241 of the pinch lever 24, and both ends thereof are attached to the pinch lever 24.
It is sandwiched between the torsion spring 243 and one end of the torsion spring 243 that is engaged with itself. Here, the constant speed drive lever 49 has a 22nd
A head chassis 50 indicated by a chain double-dashed line in the figure is interlocked by a spring (not shown). That is, the head chassis 50 has a recording/reproducing head and an erasing head (not shown) mounted at predetermined positions, and is supported so as to be slidable in the directions of arrows G and H in FIG. 22, and is supported by the constant speed drive lever. 49 is rotated counterclockwise and clockwise in FIG. 22, it is slid in the directions of arrows G and H. Here, a control hole 501 is formed approximately in the center of the head chassis 50, and a protrusion 4 protruding from the tip of one arm of the constant speed lever 46 is inserted into the control hole 501.
65 is loosely fitted. The control hole 501 of the head chassis 50 engages with the protrusion 465 of the constant speed lever 46 when the head chassis 50 is slid in the direction of arrow H in FIG.
An inclined portion 502 is formed to separate the gear 47 from the gear 48 by rotating the constant speed lever 46 clockwise in FIG. 22 against the urging force of a spring 464 (see FIG. 2). Here, in the stopped state, since the pin 491 of the constant speed drive lever 49 is located in the large diameter part (the middle part of FIG. 22) of the inner cam 311 of the constant speed driving gear 31, the constant speed The drive lever 49 is in a position rotated more clockwise than the position shown in FIG.
is also located in the direction of arrow H. Therefore, the recording/reproducing head and the erasing head are spaced apart from the tape, the gear 47 is spaced apart from the gear 48, and the protrusion 496 of the constant speed drive lever 49 moves the extension 242 of the pinch lever 24 into the 22nd position. Since it is pushed downward in the figure, the pinch lever 24 is rotated counterclockwise in FIG. 22, and the pinch roller 23 is separated from the capstan 22. In such a stopped state, the PLAY operator 12
When c is operated, the constant speed running gear 31 is meshed with the gear 30 of the capstan 22 and rotated, as described above, and rotated clockwise in FIG. 22. For this reason, the constant speed drive lever 49
is rotated counterclockwise in FIG. 22 as the pin 491 is pushed upward in the figure by the inner cam 311 of the constant speed running gear 31. As the constant speed drive lever 49 rotates, the head chassis 50 is slid in the direction of arrow G, and the recording/reproducing head and the erasing head are brought into contact with the tape. Further, the torsion spring 243 of the pinch lever 24 is pushed upward in the figure by the protrusion 496 of the constant speed drive lever 49, so that the pinch lever 24 is rotated clockwise in FIG. It is pressed against the capstan 22 via a tape. Furthermore, as the head chassis 50 is slid in the direction of arrow G, the constant speed lever 46
5 is moved along the inclined portion 502 of the control hole 501, it is eventually rotated counterclockwise in FIG. 22, and the gear 47 meshes with the gear 48. At this time, since the second gear 212 of the drive gear 21 is rotated counterclockwise in the figure, its rotational force is transmitted to the right reel shaft 18 via the gears 47 and 48, is rotated counterclockwise in the figure, and the tape is played back. Also, when the REC operator 12d is operated, the constant speed running mechanism 15 is operated to run the tape as described above, and in this case, the tape recorder circuit section is switched to the recording state. It is. Next, the pause mechanism 34 will be explained.
That is, the pose gear 33 shown in FIG.
Although not shown, the high-speed running gear 32
is formed similarly. In other words, this pause gear 33 has a guide groove 322 of the high-speed running gear 32, a recess 324, and a first and second groove on one side.
325, 326, a protrusion 328, etc. are formed on the other side, and parts corresponding to the inner cam 37, cam portion 372, release portion 373, etc. are formed on the other side, and one of them is formed on the other side. A notch corresponding to the notch 321 is formed in the portion. And the above-mentioned pose gear 33
An engaging protrusion 511 formed at one end of the pause lock lever 51 shown in FIG. 2 is loosely fitted into the guide groove. The pause lock lever 51 is rotatably supported by a rotation shaft 513 protruding from the main chassis 11 being loosely fitted into an elongated hole 512 formed approximately at the center thereof. Further, the other end of the pause lock lever 51 extends to the PAUSE operator 12e side.
is engaged with e. That is, when the PAUSE operator 12e is operated, the pause lock lever 51 is rotated counterclockwise in FIG. 33, the pose gear 33 meshes with the gear 30 and is driven to rotate. Further, in FIG. 1, a pause drive lever 52 is provided on the left side of the operating section 12 in the drawing. The pause drive lever 52 is rotatably supported by having its substantially central portion fitted onto a rotation shaft 521 protruding from the main chassis 11. The pause drive lever 52 has a pin 522 projecting from one end thereof, and this pin 522 is engaged with the inner cam of the pause gear 33. Further, the pause drive lever 52 is
A coiled spring 525 is formed between a protrusion 523 protruding near the rotating shaft 521 and a protrusion 524 protruding from the main chassis 11, so that the coil spring 525 rotates clockwise in FIG. Despite being forced,
The rotation is continued until the pin 522 comes into contact with the peripheral wall of the inner cam of the pose gear 33. Here, the pause drive lever 52 has a first
A control section 526 and a second control section 527 are formed. Of these, the first control section 526 is opposed to the engagement section 244 extending from one side of the pinch lever 24 . Further, the second control section 527 controls the constant speed lever 4 shown in FIG.
It faces a protrusion 466 (only the protrusion 466 is shown in FIG. 1) protruding from the tip of the other arm of No. 6. And now, the cassette tape recorder is on its 22nd stage.
In the constant speed state shown in the figure, the PAUSE
Assume that the operator 12e is operated. Then, the pause gear 33 is engaged with the gear 30 of the capstan 22 and driven to rotate. Therefore, the pin 522 of the pause drive lever 52 is pressed by the inner cam of the pause gear 33, and the pause drive lever 52 is rotated counterclockwise in FIG. 1 against the biasing force of the spring 525. Then, first, the pause drive lever 52
The first control section 526 presses the engaging section 244 of the pinch lever 24 to rotate the pinch lever 24 counterclockwise in FIG. Therefore, the pinch roller 23 is separated from the capstan 22. Further, the second control section 527 of the pause drive lever 52 presses the protrusion 466 of the constant speed lever 46, causing the constant speed lever 46 to rotate clockwise in FIG. For this reason, as explained in FIG. 22, the gear 47 is separated from the gear 48, and the rotation of the right reel shaft 18 is stopped, resulting in a pause state. Now, in the playback state described above, REW or FF
When the operators 12a and 12b are operated, rewind playback (review) and fast forward playback (queue) are performed. That is, in FIG. 23, the positions of each member indicated by dotted lines are the positions in the normal reproduction state. In this playback state, press REW or FF control 12.
When a and 12b are operated, the high-speed running gear 3
2 is rotationally driven, and in conjunction with this, the high-speed drive lever 38 is rotated to the position shown by the solid line in FIG. At this time, a pin 387 is provided protruding from one end of the high-speed drive lever 38, and this pin 387 presses an engaging piece 503 protruding from one side of the head chassis 50 downward in FIG. 23. For this reason,
Head chassis 50 is retracted to a position where its record/playback head is in slight contact with the tape. Then, the engaging portion 503 of the head chassis 50 presses the engaging portion 244 of the pinch lever 24 downward in FIG. 23, so the pinch lever 24 is rotated counterclockwise in FIG. is separated from the capstan 22. Further, as the head chassis 50 is moved backward, the constant speed lever 46 is rotated clockwise in FIG. Ru. The left and right reel shafts 17 and 18 are rotated by the action of the high-speed traveling mechanism 14 mentioned above, and rewind playback or fast forward playback is performed here. Next, the ASO mechanism 26 will be explained.
That is, as shown in FIG.
A cam portion 471 is formed on one side of the rotation center thereof, and the cam portion 471 is formed at a predetermined position.
A substantially arc-shaped release piece 472 is formed apart from the opening. A pin 531 protruding from one end of the ASO drive lever 53 is engaged with the cam portion 471 of the gear 47. This ASO drive lever 53 has two rotation shafts 534, 53 formed in the main chassis 11 within two long holes 532, 533 formed approximately in the center thereof.
5 are loosely fitted to each other, so that they are rotatably supported around either one of the rotation shafts 534 or 535. Of these, the rotation shaft 534 rotatably supports the right reel shaft 18, and the right reel shaft 18 and the ASO drive lever 53 are frictionally engaged as described later. . Further, a protrusion 536 is provided at the other end of the ASO drive lever 53 in a protruding manner. Here, the protrusion 53 of the ASO drive lever 53
6 is provided with an engaging portion 541 formed at one end of the ASO lever 54 so as to be freely engageable and detachable. this
The ASO lever 54 is protruded from the main chassis 11, with its other end straddling the lock plate 35 and a switch rider 55, which is disposed parallel to the lock plate 35 and supported so as to be slidable in the longitudinal direction. It is rotatably supported by being fitted onto a rotation shaft 542. The ASO lever 54 is operated by a torsion spring 543 wound around its rotation shaft 542.
41 is rotatably biased in the direction in which it is brought into pressure contact with the protrusion 536 of the ASO drive lever 53. Further, as shown in FIG. 25, an extending portion 56 extending upward in FIG. 25 is formed on the side of the REW operator 12a, and the tip of the extending portion 56 is An engaging portion 561 is formed. Approximately at the center of the ASO lever 54, an arm portion 54 that can engage with the engaging portion 561 of the extending portion 56 is provided.
4 is formed. Furthermore, a protrusion 465 of the other arm of the constant speed lever 46 is provided at a corner of the high speed lock lever 36.
A substantially semicircular control portion 366 that engages with is formed. Then, the REW or FF operator 12
When you operate a and 12b, in conjunction with that operation,
As mentioned earlier, the high speed lock lever 36
It is rotated counterclockwise in Figure 5. Then, the control section 366 of the high-speed lock lever 36 operates the constant speed lever 46.
Press the protrusion 465 diagonally downward to the left in FIG.
The constant speed lever 46 is rotated clockwise in the figure.
Furthermore, when the REW or FF controls 12a, 12b are in the non-operating position, the high-speed lock lever 36
Since the constant speed lever 46 is not rotated, the constant speed lever 46 is rotated counterclockwise in FIG. 25. Here, the operator 12a that puts the tape in a running state
In the stopped state in which none of the levers 12b to 12b are operated, the engaging portion 541 of the ASO lever 54 presses the protrusion 536 of the ASO drive lever 53 downward in the figure, as shown in FIG. The ASO drive lever 53 is urged clockwise in the figure around the rotation shaft 535. For this reason, the ASO drive lever 53
The pin 531 is connected to the cam portion 4 formed on the gear 47.
It is pressed against the peripheral wall of 71. Therefore, when the second gear 212 of the drive gear 21 is rotated counterclockwise in FIG. 26 and the gear 47 is rotated clockwise in the figure, the ASO drive lever 53 is rotated.
The rotation shaft 53 is rotated by the cam portion 471 of the gear 47.
It performs a rocking motion centering on 5. Here, the relationship between the ASO lever 54 and the switch slider 55 will be explained. That is, as shown in FIG. 27a, the switch slider 55 is installed substantially parallel to the lock plate 35, and independently of the lock plate 35, the switch slider 55 is moved along arrows C and D in FIG. 27a.
It is supported so that it can slide freely in the direction. Further, like the lock plate 35, the switch slider 55 is biased in the direction of arrow D by a spring (not shown). On one side of the switch slider 55, there are engaging pieces 551 and 552 that engage with the engaging portion 364 of the high-speed lock lever 36 and the engaging portion 454 of the constant-speed lock lever 45, respectively.
is formed. Of these, the ASO lever 54 is engaged with a side of the engagement piece 552 opposite to the side that engages with the engagement portion 364. For example, as shown in FIG. 27b,
When the PLAY operator 12c is locked in the operating position, the engaging portion 454 of the constant speed lock lever moves in the direction of arrow C by the inclined portion 455 of the PLAY operator 12c.
be moved in the direction. Then, the engaging piece 551 of the switch slider 55 is pressed by the engaging part 454, so it is slid in the direction of arrow C, and at this time, the engaging piece 552 moves the ASO
The lever 54 is rotated in the direction of arrow C, that is, clockwise in FIG. 26. At this time, the ASO lever 54 is controlled so that its engaging portion 541 is positioned slightly away from the protrusion 536 of the ASO drive lever 53. Furthermore, the ASO lever 54 can be rotated clockwise in FIG. 26 in the same manner by operating the REW and FF operators 12a and 12b. That is, although not shown in FIG. 27a, when the REW and FF operators 12a and 12b are operated, the engaging portion 364 of the high-speed lock lever 36 moves as shown in FIG. It is slid in the direction of arrow C. Therefore, the ASO lever 54 is moved in the same direction via the switch slider 55. That is, the switch slider 55 switches to the second switch regardless of whether any of the operators 12a to 12d that cause the tape to run is operated.
When the ASO lever 54 is slid in the direction of arrow C in FIG.
3 in the direction away from the protrusion 536. Now, as shown in Figure 27b, PLAY
Assume that the operator 12c is operated. Then, as previously explained in FIG. 22, the tape is run in a reproducing state, but at this time, as shown in FIG. 25 again,
The right reel shaft 18 and the ASO drive lever 53 are such that no matter which direction the right reel shaft 18 rotates, the ASO
Turn the drive lever 53 clockwise in FIG.
The pin 531 of the ASO drive lever 53 is connected by a well-known friction mechanism so as to apply a rotation biasing force in the direction of pressing the peripheral wall of the cam portion 471 of the gear 47. Therefore, when the tape is running while being played, the pin 531 of the ASO drive lever 53 comes into sliding contact with the cam part 471 of the gear 47, and the cam part 47
A rocking motion is performed by the action of 1, and a stable regeneration state is achieved. In this playback state, when the tape reaches the end, the rotation of the right reel shaft 18 is stopped and the ASO
No biasing force is applied to the drive lever 53 in the clockwise direction in FIG. 25. However, since the gear 47 is rotated by the rotational force of the second gear 212 of the drive gear 21, the pin 531 of the ASO drive lever 53 is pushed by the maximum diameter portion of the cam portion 471 of the gear 47, causing the ASO drive lever 53 to rotate as shown in FIG. The rocking is stopped in the state of being rotated counterclockwise. Then, as shown in FIG. 28, the ASO drive lever 53
is in sliding contact with the outer wall of the release piece 472 of the gear 47,
It is rotated counterclockwise in FIG. 28 about a rotation shaft 534. Therefore, the protrusion 536 of the ASO drive lever 53 pushes up the engaging portion 54 of the ASO lever 54 upward in FIG. 28, and the ASO lever 54 is rotated clockwise in the figure. Now, let the amount of rotation of the ASO lever 54 at this time be _l1 . Also,
The above operation is the same when recording, and after all, during ASO when the tape is running at constant speed during playback and recording,
The ASO lever 54 is to be rotated by a rotation amount _l1 . On the other hand, if one of the REW and FF operators 12a, 12b is operated, the high-speed lock lever 36 is rotated counterclockwise in FIG. 25, and the control section 366 is Since the projection 465 of the constant speed lever 46 is pressed, the constant speed lever 46 is held at a position rotated slightly clockwise in FIG. 25. When the tape is run at high speed, regardless of the direction of rotation of the right reel shaft 18,
Since the ASO drive lever 53 is biased in the counterclockwise direction in FIG. 25 about the rotating shaft 535, the ASO drive lever 53
3 performs a swinging motion to achieve a stable tape running state at high speed. When the tape reaches the end in such a high-speed tape running state, the rotation of the right reel shaft 18 is stopped, and as shown in FIG.
The pin 531 of the drive lever 53 is engaged with the outer wall of the release piece 472 of the gear 47 . The ASO drive lever 53 is located at the 29th position around the rotation axis 534.
It is rotated counterclockwise in the figure, and along with this,
The ASO lever 54 is rotated clockwise in FIG. 29. Here, in the state shown in FIG. 29, since the constant speed lever 46 is rotated clockwise in FIG. 29 compared to the position shown in FIG. 28, the pin 531 of the same ASO drive lever 53 is 47 release piece 4
Even when engaged with the outer wall of the ASO drive lever 53, the amount of rotation of the ASO drive lever 53 in the counterclockwise direction in FIG.
The amount of rotation is smaller than the amount of rotation shown in FIG. Therefore, the amount of rotation of the ASO lever 54 is also the second.
It is smaller than that shown in Figure 8. In other words, if the amount of rotation of the ASO lever 54 in the clockwise direction in FIG. 29 at this time is l ₂ , the amount of rotation of the ASO lever 54 when the tape is running at constant speed and when the tape is running at high speed is: l ₁ > l ₂ They come to have a relationship like this. Here, the lock plate 35 and the ASO lever 54
Explain the relationship between That is, as shown in FIG.
A letter-shaped engagement portion 57 is formed. The ASO lever 54 is engaged with the engaging portion 57 of the lock plate 35. Therefore, when the ASO lever 54 is rotated clockwise in FIGS. 28 and 29, that is, moved in the direction of arrow C in FIG. 30, the lock plate 35 is also slid in the same direction. It is something. Here, as previously explained in FIG. 3, the depth of engagement _S1 between the PLAY operator 12c and the lock plate 35 is
The engagement depth S ₂ between the lock plate 35 and the lock plate 35 is made deeper. And the above ASO lever 5
4 slides the distance lock plate 35 corresponding to the engagement depth S ₁ when rotated by the amount of rotation l ₁ ;
When the PLAY operator 12c is unlocked at the operating position and rotated by a rotation amount l ₂ , the above engagement depth S ₂
Slide the distance lock plate 35 corresponding to
The REW and FF operators 12a and 12b are unlocked at their operating positions, and an automatic stop is performed at this point. Here, an autoplay operation using the ASO mechanism 26 will be explained. In other words, the autoplay operation means that the PLAY operator 12c and
Lock the REW operator 12a together at the operating position,
Rewind the tape in the review state described above, and when the tape reaches the end (starting end from the perspective of playback), the REW control 12a is unlocked, the PLAY control 12c is kept locked, and the tape automatically starts from the beginning of the tape. It is designed to perform playback. First, PLAY operator 12c and REW operator 1
2a are both locked in the operating position, rewind playback (review) is performed as previously explained in Fig. 23.
state. When the tape reaches the end in this review state, as explained earlier in Figure 29,
Assume that the ASO lever 54 is rotated by a rotation amount _L2 , and as shown in FIG. 30, the lock plate 35 is slid a distance corresponding to the engagement depth _S2 , and the REW operator 12a is about to be released. However, when the ASO lever 54 is slid in the direction of arrow C in FIG.
Engagement portion 561 of extension portion 56 of REW operator 12a
The REW operator 12a is held in the locked position. Here, the ASO lever 54 is at the 30th position.
The period of movement in the direction of arrow C in the figure, that is,
As is clear from FIG. 29, during the period when the REW operator 12a is held in the locked position by the arm 544, the pin 531 of the ASO drive lever 53 is
is engaged with the release piece 472 of the gear 47. That is, the gear 47 rotates and the release piece 4
72 is released from the pin 531 of the ASO drive lever 53, the ASO lever 54 moves to the 29th position by the action of the torsion spring 543 shown in FIG.
It is rotated counterclockwise in the figure and returned to the position shown in FIG. Therefore, as shown in FIG. 31, the REW operator 12a is
The hold at the operating position is released and the PLAY operator 12c is returned to the non-operating position, and the PLAY operator 12c remains locked at the operating position, entering the playback state and performing an autoplay operation. Here, in the auto play operation as described above, until the release piece 472 of the gear 47 comes off from the pin 531 of the ASO drive lever 53, the REW
The reason why the operator 12a is held at the operating position will be explained. That is, as shown in FIG. 30, when the ASO lever 54 moves the lock plate 35 a distance corresponding to the engagement depth _S2 , the second
As shown in FIG. 9, the pin 531 of the ASO drive lever 53 is engaged with the outer wall of the release piece 472 of the gear 47. In this state, immediately
When the REW operator 12a is returned to its original position, the high-speed lock lever 36 is rotated clockwise in FIG. 4
6 is rotated counterclockwise in FIG. For this reason, as shown in FIG. 28, a malfunction occurs in which the ASO lever 54 rotates by a rotation amount l ₁ and eventually even the PLAY operator 12c is unlocked. Therefore, from the state shown in FIG.
The release piece 472 is the pin 5 of the ASO drive lever 53.
During the period from 31 to withdrawal, REW operator 12
By holding the position a and preventing the high-speed lock lever 36 from rotating clockwise in FIG. 29, malfunction can be reliably prevented. Furthermore, the ASO lever 54 not only slides the lock plate 35 during ASO to release the operator at the operation position, but also biases the ASO drive lever 53 when the tape is stopped, as shown in FIG. Pin 53 of the ASO drive lever 53
1 is configured to perform two operations of slidingly contacting the cam portion 471 of the gear 47, the configuration is efficient and organic, and is suitable for miniaturization. Regarding this point, conventionally, a separate member is provided in addition to the ASO lever for applying a bias to the ASO drive lever in a stopped state, which complicates the configuration. However, as mentioned above,
By allowing the ASO lever 54 to apply a bias to the ASO drive lever 53 during stopping, the configuration is simplified and malfunctions are eliminated. Here, when the tape is stopped, the biasing force applied to the ASO lever 54 by the torsion spring 543 biases the ASO drive lever 53 in a direction in which its pin 531 is pressed against the cam portion 471 of the gear 47. Explain the reason for keeping it. That is, assuming that no bias force is applied to the ASO drive lever 53 when the tape is stopped, when the operators 12a to 12d that cause the tape to run are operated, the ASO drive lever 5
It is unknown what rotational position the pin 531 is in. In other words, the position of the pin 531 is uncertain. When the tape is stopped, this pin 5
31 is located away from the cam portion 471 of the gear 47, as shown in FIG. 25, for example, when the operators 12a to 12d that cause the tape to run are operated and the gear 47 is rotated. ,
The release piece 472 of the gear 47 engages with the pin 531,
In the end, as explained in FIG.
This will result in a malfunction in which the locks 12d to 12d are unlocked from their operating positions. Therefore, when the tape is stopped, by biasing the ASO drive lever 53 in a direction in which its pin 531 is pressed against the cam portion 471 of the gear 47, the operators 12a to 12d are operated and the gear 47 is pressed.
When the ASO drive lever 53 is rotated, the ASO drive lever 53 can immediately start its swinging motion, thereby preventing the above-mentioned malfunction from occurring. In other words, when the tape is stopped, the ASO drive lever 5
3 in the direction in which the pin 531 is pressed against the cam portion 471 of the gear 47.
This sets the initial position of the pin 531 when 2a to 12d are operated. Further, after the operators 12a to 12d are operated and the tape is run, the switch slider 55 is controlled to move the ASO lever 54 away from the ASO drive lever 53.
Since the biasing force of the torsion spring 543 is not applied to the ASO drive lever 53 when the tape is running, only the biasing force due to the rotation of the gear 48 is applied to the ASO drive lever 53, and the automatic stop operation described above is not performed. It will now work without any problems. And as above, with the tape stopped
The ASO lever 54 applies a biasing force to the ASO drive lever 53 in the direction in which its pin 531 comes into pressure contact with the cam portion 471 of the gear 47, and the switch slider 55 moves the ASO lever 54 while the tape is running.
The feature of this invention is that it is controlled to be separated from the ASO drive lever 53. Next, the surroundings of the REC operator 12d will be explained. That is, as shown in FIG. 32, the roughly L-shaped accidental erasure prevention lever 27 is rotatably supported at its corner by a rotation shaft 271, and one end thereof is connected to the transmission lever 28. Connected to one end. Here, a rotation shaft 272 is provided protruding from the other end of the accidental erasure prevention lever 27, and a corner of the approximately L-shaped REC control lever 58 is fitted onto the rotation shaft 272. , is rotatably supported. One end of this REC control lever 58 has a pair of engagement pieces 581 and 582 on both sides thereof.
is formed. Further, a pin 273 is provided protruding from the pivot shaft 271 of the accidental erasure prevention lever 27 . Then, the above REC control lever 5
8 is connected to the third by a torsion spring 583 whose central portion is wound around the pin 273 and whose both ends are respectively locked by the engaging pieces 581 and 582.
It is held at the position shown in FIG. 2, and no matter which direction it is rotated about the rotation shaft 272 from this position, it returns to the position shown in FIG. 32. Here, the other ends of the REC control lever 58 and the accidental erasure prevention lever 27 are provided with engaging portions 59 and 60, which will be described later, formed on the REC operator 12d.
Engagement pieces 584 and 274 that can be engaged with each other are formed. In addition, the above REC control lever 5
The upper side of the other end of 8 in FIG.
A locking piece 586 that can be engaged with 5 is provided. Here, if the accidental erasure prevention claw of the tape cassette has been broken off, when an attempt is made to operate the REC operator 12d, the REC control lever 58 will close its engagement piece 584 as shown in FIG.
is engaged with the engaging portion 59 of the REC operator 12d and rotated counterclockwise in FIG. 33 against the biasing force of the torsion spring 583. At this time, the engagement piece 274 of the accidental erasure prevention lever 27 also
When engaged with the engaging portion 60 of the operator 12d, the 33rd
As shown in the figure, it is about to be rotated counterclockwise, but first
As explained in the figure, the accidental erasure prevention claw detection lever 2
5 is in contact with the end of the erroneous erasure prevention detection lever 29, the rotation of the erroneous erasure prevention lever 27 is prevented via the transmission lever 28. For this reason, REC
The engaging portion 60 of the operator 12d comes into contact with the engaging piece 274 of the erroneous erasing prevention lever 27 so that it cannot be operated, thereby preventing erroneous erasing. Here, the engaging portion 59 of the REC operator 12d,
60 will be explained. That is, as shown in FIG. 34, the engaging portions 59 and 60
REC controller 12.
Inclined portions 591 and 601 are formed at the tip portion in the operating direction d (that is, the direction of the arrow in FIG. 34). Further, this inclined portion 601 is formed via an abutment portion 602 that projects approximately perpendicularly from the upper surface of the REC operator 12d in FIG. and,
When the REC operator 12d is operated in the direction of the arrow in the figure, the engaging pieces 584, 274 of the REC control lever 58 and the accidental erasing prevention lever 27 engage the engaging portions 59,
It is pushed upward in the figure by the inclined portions 591 and 601 of 60. However, the state shown in FIG. 34 shows a state in which the accidental erasure prevention described above with reference to FIG. 33 has been performed. That is, in this case, the abutting portion 602 of the engaging portion 60 abuts the engaging piece 274 of the erroneous erasure prevention lever 27, thereby preventing the REC operator 12d from being operated. Also,
If the accidental erasure prevention claw of the tape cassette has not been broken off, when the REC operator 12d is operated, the inclined part 591 of the engaging part 59 will first
The engagement piece 584 of the REC control lever 58 is pressed,
The REC control lever 58 is rotated counterclockwise in FIG. 33. For this reason, the REC control lever 58
In conjunction with this, the erroneous erasure prevention lever 27 is also rotated counterclockwise in FIG. The contact portion 602 of 60 is moved upward in FIG. 34.
Thereafter, the accidental erasure prevention lever 27 is rotated counterclockwise in FIG. 33 by the inclined part 601 of the engaging part 60 of the REC operator 12d.
As shown in Fig. 35, the REC operator 12d
is moved to the operating position and put into recording mode. Here, in the recording state shown in FIG. 35,
The locking piece 586 of the REC control lever 58 is
It faces the engaging portion 585 of the operator 12c. Therefore, even if the PLAY operator 12c is not operated in the recording state, the engaging portion 585 is brought into contact with the locking piece 586 of the REC control lever 58, so the PLAY operator 12c is not operated.
The operator 12c is not operated. That is, in the recording state, follow-up playback is performed. The reason for this prevention of follow-up regeneration will be explained below. First, as mentioned above, this cassette tape recorder is designed so that only the REC operator 12d needs to be operated alone when the cassette tape recorder is in the recording state. That is, in Figure 2, REC
When the operator 12d is operated alone, an engaging portion (not shown) extending from the REC operator 12d engages with an engaging portion 454 of the constant speed lock lever 45, and the constant speed lock lever 45 is rotated counterclockwise in FIG. It is designed to be rotated in one direction. For this reason, as explained earlier in the regeneration state, the constant speed running gear 3
1 is meshed with the gear 30 and rotated, and thereafter the tape runs in the same manner as in the playback state, and the tape recorder circuit section is switched to the recording state. At this time, considering the above-mentioned high-speed traveling mechanism 14 , the engagement protrusion 451 of the constant speed lock lever 45
corresponds to that shown in FIG. 8, and is in a state of being locked to a protrusion (not shown) of the constant speed running gear 31. If you operate the PLAY operator 12c in this state, that operation will cause the REC operator 1 to
2d is unlocked, but since the PLAY operator 12c is in the operating position instead, the constant speed lock lever 45 remains rotated counterclockwise in FIG.
In other words, the engagement protrusion 451 is the gear 31 for constant speed traveling.
It remains locked on the protrusion. In other words, the PLAY operator 12c is locked at the operating position while the recording state is maintained, rather than once entering the stop state and then returning to the play state. For this reason, even though the PLAY operator 12c is being operated,
This causes a malfunction in which the tape recorder is left in the recording state. Therefore, as shown in FIG. 35, the above-mentioned malfunction can be prevented by not allowing the PLAY operator 12c to be operated in the recording state. In addition, this cassette tape recorder has REC
This is not limited to the case where the operator 12d is operated alone.
Even when the REC operator 12d and PLAY operator 12c are operated at the same time, the recording state can be entered. That is, in this case, as shown in FIG. 36, the REC control lever 58 and the erroneous erasure prevention lever 27 are each rotated counterclockwise in FIG. 36 in conjunction with the operation of the REC operator 12d. However, since the PLAY operator 12c is also operated at the same time, the locking piece 586 of the REC control lever 58 does not face the engaging portion 585 of the PLAY operator 12c as shown in FIG.
As shown in the figure, it comes into contact with the lower part of the engaging portion 585 in the figure. Then, at this position, the REC control lever 58
is prevented from rotating, and the PLAY operator 12c is operated. Note that this invention is not limited to the above-described embodiments, and can be implemented with various modifications without departing from the gist of the invention. [Effects of the invention] Therefore, as detailed above, according to this invention, it is possible to prevent malfunctions when starting tape running from a tape stopped state with a simple configuration, and to ensure reliable operation without malfunctions. Therefore, it is possible to provide an extremely good tape end detection mechanism.

[Brief explanation of the drawing]

1 and 2 are a plan view showing a cassette tape recorder to which this invention is applied, and a plan view showing the main chassis seen through the plan view, and FIG. 3 is a configuration diagram showing a lock mechanism,
Figure 4 is a configuration diagram showing the relationship between the high-speed travel gear and the high-speed lock lever in the high-speed travel mechanism, Figure 5 is a configuration diagram showing the relationship between each operator and the high-speed and constant-speed lock levers, and Figure 6 is the configuration diagram showing the relationship between the high-speed travel gear and the high-speed lock lever. Operation explanatory diagram in Figure 5, No. 7
8 and 8 are respectively explanatory views of the operation of FIG. 4, FIG. 9 is a configuration diagram showing the inner cam of the high-speed traveling gear, and FIG. 10 is a plan view showing the fast-forward and rewind switching mechanism of the high-speed traveling mechanism. 11 is a perspective view showing details of the torsion spring portion in FIG. 10, FIGS. 12a to 12c are block diagrams and explanatory diagrams of the high-speed switching slider, respectively, and FIGS. 13a, b, and 14 Figures a and b are explanatory diagrams of the operation in Figure 10, respectively;
Figures 15 and 16 a to c are respectively 11th
FIG. 17 is a configuration diagram showing the high-speed transmission mechanism of the high-speed traveling mechanism; FIG. 18 is an exploded perspective view showing the main parts of the high-speed transmission mechanism; Figure 19 is an explanatory diagram of the operation of Figure 17;
20 and 21 are detailed operation explanatory diagrams of the high-speed running gear and the high-speed lock lever, respectively.
Fig. 2 is an explanatory diagram of the constant speed traveling mechanism, Fig. 23 is an explanatory diagram of fast forward playback and rewind playback, Fig. 24 and Fig. 2
Figure 5 shows an embodiment of the tape end detection mechanism according to this invention, and is a perspective view and a configuration diagram showing the ASO mechanism, Figure 26 is an explanatory diagram of the operation of the ASO mechanism, and Figures 27a and 27b are respectively 28 and 29 are diagrams illustrating the operation of the ASO mechanism during tape constant speed and high speed running, respectively.
Figures 0 and 31 are respectively explanatory diagrams of the auto play operation, Figures 32 and 33 are respectively a configuration diagram and an explanatory diagram of the operation of the accidental erasure prevention mechanism, and Figure 34 is a side view showing details of the REC operator. , FIG. 35 is an explanatory diagram of the operation to prevent follow-up playback in the recording state,
FIG. 36 is an explanatory diagram when the REC operator and PLAY operator are operated at the same time. 11...Main chassis, 12 ...Operation unit, 1
3...Lock mechanism, 14 ...High speed traveling mechanism, 15
... Constant speed traveling mechanism, 16 ... Eject lever,
17...Left reel axis, 18...Right reel axis, 1
9, 20... Gear, 21... Drive gear, 22...
Capstan, 23...Pinch roller, 24...
Pinch lever 25...accidental erasure prevention claw detection lever,
26... ASO mechanism, 27... Accidental erasure prevention lever,
28... Transmission lever, 29... Erroneous erasure prevention detection lever, 30... Gear, 31... Constant speed running gear,
32... Gear for high-speed running, 33... Gear for pause, 34 ... Pause mechanism, 35... Lock plate, 3
6...High-speed lock lever, 37...Inner cam, 38
...High-speed drive lever, 39...High-speed switching lever,
40... High speed switching slider, 41... Bending control piece, 42... High speed lever, 43, 44... Gear,
45... Constant speed lock lever, 46... Constant speed lever, 47, 48... Gear, 49... Constant speed drive lever, 50... Head chassis, 51... Pause lock lever, 52... Pause drive lever, 53...
...ASO drive lever, 54...ASO lever, 55
...Switch slider, 56...Extension portion, 57...
...Engagement part, 58...REC control lever, 59, 6
0...Engagement part.

Claims (1)

[Scope of utility model registration request] A first rotating body that has a cam part and a release part and is rotated independently of tape running; a second rotating body that is rotated in conjunction with tape running; and a second rotating body that is rotated by the rotational force of the second rotating body. is biased in one direction, slides into contact with the cam portion of the first rotating body, and swings, and when the second rotating body stops rotating, the swinging is stopped, and the releasing portion of the first rotating body a detection member that is engaged with and moves; a release member that is moved in conjunction with the detection member; and a release member that locks the tape running operator at the operating position, and that releases the tape when the release member is moved. a lock mechanism for releasing the lock in the operating position of the tape running operator; and a cam portion of the first rotating body in which the detection member is connected to the release member when the tape running operator is in the non-operating position. and a control member that separates the release member from the detection member in conjunction with the operation of the tape running operator. Detection mechanism.