JP2001184757A - Tape recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively manufacture a tape recorder which is capable of selectively executing various actions by curtailing electric parts, such as plungers, using costly solenoids. SOLUTION: The tape recorder is so constituted that a traveling direction of a magnetic tape is manipulated to be changed over cooperatively with a cam 140 of a cam gear 40 of a traveling direction changeover mechanism by making action to selectively move the position of a magnetic head 104 cooperatively with an action changeover cam 88 of a cam gear 38 of the traveling mode changeover mechanism and that the various operating states of the tape recorder may be set in association with the respective actuating states of these mechanisms. As a result, the many actions of the tape recorder may be executed by combining the actions of the two cam mechanisms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder that converts a rotational driving force transmitted from a motor by a gear mechanism or the like and can selectively execute various operations.

[0002]

2. Description of the Related Art A so-called car stereo cassette tape recorder has conventionally been used as one of tape recorders.

In this cassette tape recorder for car stereos, for example, when a cassette tape is inserted into an entrance, the sensor detects this, and a control unit that receives the detection signal drives a loading motor to operate a loading mechanism. By doing so, the cassette tape is loaded at a predetermined position inside the tape recorder.

The control unit receives detection signals from various sensors and generates a control signal based on an operation command of switches of the tape recorder, and the control signal generates a control signal using the solenoid of the operating mechanism. A control operation is performed by driving a motor or the like to switch the operation mechanism between a traveling direction and an operation state corresponding to a desired operation mode.

[0005] Thereafter, the car stereo cassette tape recorder performs a recording / reproducing operation while driving a traveling motor in accordance with a control signal of a control unit to cause the magnetic tape of the cassette tape to travel in a forward or reverse direction, or Perform a music scan operation, or perform a fast forward or rewind operation.

In this car stereo cassette tape recorder, when an operation such as recording / reproducing of a cassette tape is completed, the control unit sends a control signal to a loading motor based on an operation command of switches and drives the loading motor to drive the loading mechanism. Is operated to unload the cassette tape to the entrance of the tape recorder.

[0007]

In a cassette tape recorder for a car stereo as a tape recorder as described above, a large number of operations are required to control various mechanisms for recording / reproducing operations and to execute a running operation of a magnetic tape. Since electric components such as a control device, a control motor, and a plunger using a solenoid are used, the product price is high.

In view of the above facts, the present invention minimizes the use of expensive electric components such as plungers using solenoids, and can be manufactured at a low cost by selectively executing various operations by a mechanical structure. The purpose is to provide a new tape recorder.

[0009]

According to a first aspect of the present invention, there is provided a tape recorder, wherein a position of a magnetic head with respect to a position of a recording / reproducing magnetic tape is linked to an operation switching cam of a cam gear whose rotation is controlled. A traveling mode switching mechanism for selectively moving operation, and a traveling direction switching mechanism for switching a traveling direction of the magnetic tape in conjunction with a cam of a cam gear whose rotation operation is controlled, each of which is set by the traveling mode switching mechanism. Various operation states can be set by associating the state of the mechanism in the operation with the state of the mechanism in each operation set by the traveling direction switching mechanism.

According to a second aspect of the present invention, in the tape recorder according to the first aspect, the operation switching cam groove of the cam gear in the traveling mode switching mechanism moves the magnetic head to a stop position, and a magnetic head. And a play operation unit for moving the magnetic head to a play operation position for bringing the magnetic head into contact with the magnetic tape so that recording and reproduction can be performed.

According to a third aspect of the present invention, in the tape recorder according to the first or second aspect, the cam groove for switching the traveling direction of the cam gear in the traveling direction switching mechanism is configured to rotate the cam gear of the traveling direction switching mechanism. When the driven pin, which is formed in a closed curve eccentric to the center and follows the inside of the cam groove, reaches the position closest to the center of rotation, it is set in a state where it is switched to one running direction, and the driven pin is set to the center of rotation. When the vehicle reaches the position farthest from the vehicle, the vehicle is switched to the other traveling direction.

With the above-described configuration, a number of operations such as a stop operation, a rewind operation, a forward play operation, a fast-forward operation, and a reverse play operation can be performed by combining the operations of the two cam mechanisms. Therefore, the shape of the cam curve used for each cam mechanism can be simplified and can be manufactured at low cost. At the same time, by combining the operations of the two cam mechanisms, it is possible to make room for the setting conditions that can be set for control and to expand the degree of freedom in designing for control.

According to a fourth aspect of the present invention, in the tape recorder according to any one of the first to third aspects, one of the capstan shafts and one of the pinches are used when performing a play operation in one of the running directions. Roller, and has another capstan shaft and another pinch roller used when performing a play operation in the other traveling direction, and is switched in conjunction with the traveling direction switching operation to one or the other in the traveling direction switching mechanism. One or the other pinch roller corresponding to the traveling direction is set in a state where it can be pressed against the corresponding one or the other capstan shaft by the traveling direction switching mechanism, and the one or the other pinch set by the traveling direction switching mechanism. The roller is moved in conjunction with the movement of the moving operation member on which the magnetic head is mounted in the traveling mode switching mechanism to the play operation position. One or by being configured so as to press the other of the capstan shaft is characterized.

With the above-described configuration, a required pinch roller corresponding to the switched traveling direction is selected,
The operation of pressing the selected pinch roller against the capstan shaft with a predetermined timing during the play operation can be realized with a simple configuration using the traveling mode switching mechanism and the traveling direction switching mechanism. In addition, since the operation of switching the pinch roller to or from the capstan shaft is performed by the traveling mode switching mechanism, the operation of the pinch roller can be executed at an appropriate timing in synchronization with the movement operation of the magnetic head.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cassette tape recorder for a car stereo according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a mechanism part mounted on a mechanical chassis as an internal device of the tape recorder. As shown in FIG. 1, a single drive motor 12 is provided at one end of the mechanical chassis 10.

A drive pulley 14 is axially mounted on the mechanical chassis 10 adjacent to the drive motor 12, and a pair of capstan pulleys 16 and 18 are provided at the other end.
And an auxiliary pulley 26 for changing the winding direction of the belt.

A belt 22 for transmitting a rotational force is wound around the output pulley 20 fixed to the output shaft of the drive motor 12 and the drive pulley 14, and a pair of capstan pulleys 16 and 18 are provided. Auxiliary pulley 2 between
As shown in the figure, a belt 24 for transmitting a rotational force is wound around the belt 6 so that the directions of rotation are reversed.

That is, the rotational driving force of the single driving motor 12 is selectively transmitted from the driving pulley 14 to various operating mechanisms, and the capstan pulleys 16 and 18 are selectively transmitted.
Is transmitted to Therefore, when the drive motor 12 is driven to rotate, the capstan shafts 28, 30 integrated with the rotation shafts of the capstan pulleys 16, 18 are always rotated.

A drive pulley 14 is provided on the mechanical chassis 10.
And various operating mechanisms including a gear mechanism that receives the rotational driving force by selectively switching from the above.

On the mechanical chassis 10, an operation switching mechanism (14, 50, 52, 54, 58, 58) constituted by a gear train up to a pendulum gear 32 interlocked with the driving pulley 14.
72 etc.) are mounted. Also, on the mechanical chassis 10, the operation switching mechanism (14, 50, 52, 54, 58, 7) is provided.
2) is mounted with a loading mechanism (34, 62, 64, 66, 68, 70, 76, etc.) having a first cam gear 34 that is interlocked when the pendulum gear 32 of the second type is selectively connected.

Further, on the mechanical chassis 10, there is provided a tape running gear 36 to which the pendulum gear 32 of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) is selectively connected and interlocked. Tape drive mechanism (36, 184, 1
86 etc.) are mounted.

At the same time, an operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) is provided on the mechanical chassis 10.
Traveling mode switching mechanism (3) having a second cam gear 38 which is interlocked when the pendulum gear 32 of the
8, 88, 98, 100, 106, 110, 112, etc.)
Is installed.

The mechanical chassis 10 has a traveling direction switching mechanism (4) having a third cam gear 40, which is a toothless gear that can be engaged with or disengaged from the second cam gear 38.
0, 120, 122, 124, 126, 128, 140
Etc.) are installed. Further, the mechanical chassis 10 includes
The third cam gear 40 is connected to the portion between the second cam gear 38 and the third cam gear 40 at a predetermined timing.
An interlocking mechanism (42, 130, 114, etc.) having an operating member 42 for meshing with the.

A running mode switching mechanism (38, 88, 98,
100, 106, 110, 112, etc.), the operation timing adjustment mechanism (44, 106, 116, 142, 14
4, 146, 148, etc.).

The mechanical chassis 10 is provided with two hub driving gears 46 and 48 for rotating each hub of the loaded cassette tape.

A loading mechanism (34, 62, 64, 66, 68, 70, 7) is provided on the side of the mechanical chassis 10 opposite to the side on which various gear mechanisms are mounted.
6) is mounted with a link mechanism (80, 82, etc.) for loading the cassette tape.

As shown in FIG. 4, the operation switching mechanism (14, 5
0, 52, 54, 58, 72, etc.) are a drive-side gear 50 coaxially integrated with the drive pulley 14, a small-diameter intermediate gear 52 meshed with the drive-side gear 50, and a large-diameter intermediate gear 54 meshed with this. And a gear train of a pendulum gear 32 meshing with the gear.

A pendulum plate 58 is rotatably mounted on the large-diameter intermediate gear 54 of the operation switching mechanism coaxially with its rotary shaft 56. Further, the large-diameter intermediate gear 54 and the pendulum plate 58 A felt sheet or a friction spring member or the like is interposed as friction means for increasing the friction between them to a predetermined value or more. It is configured to rotate by the frictional force of.

The pendulum gear 58 is mounted on the pendulum plate 58. Accordingly, the pendulum plate 58 swings in the direction of arrow D or in the opposite direction in accordance with the rotation direction of the large-diameter intermediate gear 54 to mesh the pendulum gear 32 with the connecting gear 62 as shown by the solid line in FIG. 4 meshes with the tape running gear 36 as shown by the one-dot chain line or the running mode switching mechanism (38, 88, 98, 100, 1) as shown by the two-dot chain line in FIG.
06, 110, 112, etc.) to selectively mesh with the driven gears 84 so that they can be connected and linked.

The pendulum plate 58 has an operation switching mechanism (1).
4, 50, 52, 54, 58, 72, etc.) in order to mechanically control the operation of the pendulum plate 58, the interlocking piece portion 60 protruded from a predetermined position on the outer periphery of the pendulum plate 58 into a small forked piece, and a pendulum plate. 58
A braking member 61 is provided at a position near the bearing of the pendulum gear 32.

A loading mechanism (34, 62, 64, 66, 68, 7) selectively connected to and linked to the operation switching mechanism.
0, 76, etc.) are a large-diameter connection gear 62 arranged so as to be connectable to the pendulum gear 32, a small-diameter intermediate gear 64 formed coaxially with the connection gear 62, and an intermediate gear 64.
And the interlocking gears 66 and 68
And the like.

The first cam gear 34 is provided with a cam groove 70 for a loading operation as shown in FIGS. The cam groove 70 for the loading operation is
A relief groove 70B is formed on the back surface of the first cam gear 34, and is provided integrally with a relief groove 70B extending in a radial direction from a predetermined portion of a substantially small circular groove periphery 70A.

The first cam gear 3 is mounted on the mechanical chassis 10.
An interlocking follower 72 is axially mounted between 4 and the pendulum plate 58. This interlocking follower 72 has a shaft pin 74
The driven pin 76 erected at one end thereof faces the cam groove 70, and the driven shaft 78 erected at the other end thereof is interposed between the interlocking pieces 60 of the pendulum plate 58. It is fitted to face.

Although not shown, the interlocking gears 66 and 68 have a loading mechanism (34, 62, 64, 66, 68,
70, 76, etc.) (80, 82, etc.)
It is linked to.

In the state shown in FIG. 4, the driving force for rotating the output pulley 20 of the driving motor 12 in the direction of arrow A is applied to the operation switching mechanism (14, 50, 52, 54, 58, 72).
) Is rotated in the direction of arrow D, the pendulum gear 32 meshing with the intermediate gear 54 is rotated in the direction of arrow E, and the loading mechanism (34, 6
2, 64, 66, 68, 70, 76, etc.) and the interlocked first cam gear 34 is rotated in the direction of arrow G.

At this time, since the large-diameter intermediate gear 54 rotates in the direction of arrow D, a force in the direction of rotating the pendulum gear 32 in the direction of arrow D to separate it from the connection gear 62 acts on the operation switching mechanism. . However, the pendulum plate 58 to which the pendulum gear 32 is attached has the interlocking follower 72 interlocked with the interlocking piece 60 by the driven shaft 78. The interlocked follower 72 is configured to move the driven pin 76 around the substantially small circular groove 70 of the first cam gear 34.
The rotation in the direction of the arrow H is stopped in the state of sliding contact with A. Therefore, the operation switching mechanism maintains the connected state in which the pendulum gear 32 meshes with the connection gear 62 because the pendulum plate 58 is stopped by the interlocking follower 72.

In this state, the rotational driving force of the driving motor 12 is transmitted via the operation switching mechanism, and the loading mechanism (3
4, 62, 64, 66, 68, 70, 76) of the first cam gear 34 is rotated in the direction of arrow G from the state of FIG. 4 to the state of FIG. Then, interlocking gears 66 and 68 interlocking with the first cam gear 34 and an interlocking mechanism (42, 1
The cassette holding unit 80 of the link mechanism unit (80, 82, etc.) shown in FIG.

The cassette holding section 80 shown in FIG. 2 is located at a position separated from the mechanical chassis 10 for a cassette tape (not shown) to enter and exit. When a part of the cassette tape is inserted into the cassette holder 80 in this state, the operation lever 82 of the cassette holder 80 shown in FIG. 2 moves in the direction of arrow I to the position shown in FIG. Pull the cassette tape to the specified position.

Following this operation, the cassette holder 80 is moved from the position shown in FIG. 2 to the position shown in FIG.
It is loaded in the upper predetermined position.

In order to unload the cassette tape, the drive motor 12 is reversed from the above-described rotation direction, and the cassette holding portion 80 at the loading completion position is raised to a predetermined position separated from the mechanical chassis 10.
The operation lever 82 is moved in the direction opposite to the arrow I, and a part of the cassette tape is pulled out from the cassette holding unit 80.

During the unloading operation, since the large-diameter intermediate gear 54 of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) rotates in the direction opposite to the arrow D, the operation switching mechanism is not operated. A force acts in a direction in which the pendulum gear 32 is rotated in a direction opposite to the arrow D and pressed against the connection gear 62. Therefore, the pendulum plate 58 also rotates in the direction opposite to the arrow D, and the interlocking follower 72 rotates in the direction opposite to the arrow H, so that the driven pin 76 comes out of the escape groove portion 70B and the substantially small circular groove periphery 70.
A transition to A allows smooth unloading operation.

As described above, the operation switching mechanism (14, 5,
0, 52, 54, 58, 72, etc.) and the loading mechanism (34, 62, 64, 66, 68, 70, 76, etc.)
The combination of the interlocking follower 72 connected to the pendulum plate 58 and the cam groove 70 of the first cam gear 34 that drives the driven pin 76 provided on the interlocking follower 72, after switching the operation switching mechanism to the loading operation. Drive motor 12
When the loading operation is performed by reversing the rotation direction, the operation in which the pendulum plate 58 tries to separate the pendulum gear 32 from the connection gear 62 can be stopped to complete the loading operation.

That is, in a so-called pendulum mechanism (54, 32) using the large-diameter intermediate gear 54, the pendulum gear 32, etc. of the operation switching mechanism, the swinging operation of the pendulum determined by the rotation direction of the large-diameter intermediate gear 54 is performed. The gear of the pendulum mechanism meshes with the gear of the corresponding other mechanism during the predetermined operation, regardless of the so-called forward or reverse rotation of the pendulum mechanism, mechanically controlled by the link mechanism and the cam mechanism. The predetermined operation can be completed while maintaining the state.

The operation switching mechanism includes a large-diameter intermediate gear 5.
By configuring the link mechanism connecting the fourth cam gear 34 and the first cam gear 34 with two links of the pendulum plate 58 and the interlocking follower 72, the layout of various components on the mechanical chassis 10 is rationalized. This makes it easier to increase the degree of freedom of design, simplifies the configuration of the entire device, and reduces the size of the entire device.

As shown in FIGS. 5 to 7, the traveling mode switching mechanism (38, 88, 9) selectively connected to and linked to the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.).
8, 100, 106, 110, 112, etc.) are a large-diameter driven gear 84 and a small-diameter intermediate gear 86 coaxially integrated therewith.
And a second cam gear 38 that meshes with the intermediate gear 86.

An operation switching cam groove 88 is formed on the back side of the second cam gear 38 whose rotation is controlled.
Around the groove of the operation switching cam groove 88, an arc-shaped stop operation section 90 in which the distance from the rotation center of the second cam gear 38 is the longest, and a linear play operation in which the distance from the rotation center is the shortest. A unit 92 and a linear music scan operation unit 94 having a medium distance from the center of rotation are provided. Further, a switching timing setting section 96 that projects in a small triangular shape is provided at an intermediate position of the play operation section 92 in the operation switching cam groove 88.

The stop operation section 90 is configured to move the magnetic head to the stop position, and the music scan operation section 94 is configured to move the magnetic head to a position where the magnetic head is lightly brought into contact with the magnetic tape. The operation unit 92 is configured to move the magnetic head to a play operation position where the magnetic head is brought into contact with a magnetic tape so that recording and reproduction can be performed.

The traveling mode switching mechanism (38, 88, 98,
100, 106, 110, 112, etc.), the side of the mechanical chassis 10 opposite to the side on which the various gear mechanisms are mounted is provided with the position of the magnetic head relative to the position of the recording / reproducing magnetic tape. Is mounted so as to be movable in the direction of arrow J or in the opposite direction.

The movement operation member 98 is provided with a link receiving portion 100, which is a small rectangular opening, near the corner at one end along the arrow J direction, and extends from the center of the one end in the arrow J direction. A braking control unit 102 is provided as a side that extends along and can contact the braking member 61. Further, the moving operation member 98 is provided with a magnetic head 104 at the other end along the arrow J direction.

The second cam gear 3 is mounted on the mechanical chassis 10.
An operation follower 106 is mounted between the moving member 8 and the moving operation member 98. This operation follower 106 is axially mounted at its intermediate portion with a shaft pin 108, and a driven pin 110 erected at one end thereof faces the operation switching cam groove 88.
The operation shaft 112 erected at the other end is mounted so as to face the interlocking receiving portion 100 of the moving operation member 98.

An operation column 114 for operating the operation member 42 is provided upright at a predetermined position on the side surface of the second cam gear 38.

The running mode switching mechanism (38, 88, 98, 100, 106, 110, 11) configured as described above.
2), when the output pulley 20 of the drive motor 12 is turned in the direction of arrow A as shown in FIG. 4, the large-diameter intermediate gear 54 of the operation switching mechanism is turned in the direction of arrow D. Accordingly, the pendulum plate 58 is also rotated in the direction of arrow D, and the pendulum gear 32 is engaged with the driven gear 84 as shown in FIG.

Further, in this state, when the rotational driving force of the driving motor 12 is transmitted to the driven gear 84 via the pendulum gear 32, the second cam gear 38 is rotated in the direction of arrow K via the intermediate gear 86.

Then, while the driven pin 110 slides on the stop operation part 90 of the operation switching cam groove 88 with the rotation of the second cam gear 38, the operation follower 106 is shown in FIG. In this position, the moving operation member 98 is located at the lowest position on the lower side in FIG. 5, and the magnetic head 104 is at the standby position separated from the magnetic tape of the cassette tape.

Next, the second cam gear 38 is further rotated, and the driven pin 110 is moved to the music scan operation section 94.
The operation follower 1 is moved by sliding on the upper side.
06 is rotated in the direction of arrow L, and the moving operation member 98 interlocks with the interlocking receiving portion 100 in which the operation shaft 112 is inserted.
Moves in the arrow J direction.

When the driven pin 110 reaches the end of the music scan operation section 94 near the switching timing setting section 96, the magnetic head 104 moved in the direction of arrow J as shown in FIG. Set to the state of the music scan that touches.

When the second cam gear 38 is further rotated in the direction of the arrow K, the driven pin 110 moves on the play operation section 92 and moves, and the moving operation member 98 is further moved in the direction of the arrow J. Then, when the driven pin 110 reaches the predetermined play corresponding position shown in FIG. 7 from the switching timing setting section 96, the moving operation member 98 moves to a predetermined end position in the direction of the arrow J, and the magnetic head 104 moves to the magnetic tape of the cassette tape. Is set to a play state in which a predetermined pressure is applied during recording and reproduction.

Next, when the second cam gear 38 is rotated in the direction of the arrow K, the driven pin 110 is displaced from the predetermined play-compatible position and immediately moves to the stop operation section 90, via the operation follower 106. Moving operation member 98 linked with
Moves in the direction opposite to the arrow J and returns to the standby position shown in FIG.

When the moving operation member 98 is at the standby position, the stop control unit 1 of the moving operation member 98 is determined based on the rotation locus of the braking member 61 of the pendulum plate 58 in the operation switching mechanism.
02 is located at a position where the pendulum plate 02 has come off.
The loading mechanism (34, 62, 64, 6)
6, 68, 70, 76, etc.) and the pendulum gear 32
Are in a state where they can mesh with the connection gear 62.

Further, when the moving operation member 98 is located at the play position or the music scan position, the stop control unit 102 of the moving operation member 98 is present on the rotation locus of the braking member 61 of the pendulum plate 58 in the operation switching mechanism. As a result, the pendulum plate 58 moves to the tape drive mechanism (36, 184, 186, etc.) side as shown in FIG. 6 or 7, and the pendulum gear 32 is brought into a state capable of meshing with the tape running gear.

In the tape recorder of this embodiment, the running mode switching mechanism (38, 88, 98, 100, 106,
110, 112, etc.) in order to supplement the operation relating to the switching timing setting section 96 of the operation switching cam groove 88,
Operation timing adjustment mechanism (44, 106, 116, 14)
2, 144, 146, 148, etc.). As shown in FIGS. 7 to 9, the operation timing adjustment mechanism (4
4, 106, 116, 142, 144, 146, 148
) Is the timing adjustment gear 44 and the locking lever 116
And

The locking lever 116 is formed in a substantially U-shape. One end of the locking lever 116 is axially mounted on the mechanical chassis 10 with a shaft pin, and a torsion spring 146 (FIG.
17 (shown in FIG. 17), and is attached so as to rotate in the direction of arrow M.
Of the driven pin 110 side.

When the driven pin 110 is located in the stop operation section 90, the music scan operation section 94, or the play operation section 92 (excluding the switching timing setting section 96) in the operation switching cam groove 88, FIG. As shown in the figure, the distal end of the locking lever 116 is disengaged from the end of the operation follower 106 on the driven pin 110 side.

The driven pin 110 is connected to the operation switching cam groove 8.
8 near the position where the operation follower 106 is moved in the direction of the arrow L most by being moved by the switching timing setting section 96 of FIG.
The locking lever 116 is rotated in the direction of the arrow M by the urging force of a spring (not shown), and is locked to the driven pin 110 side corner end of the operation follower 106 as shown in FIG. Note that the second cam gear 38 is slightly rotated after the locking lever 116 is locked to the operation follower 106, and is stopped after the driven pin 110 is in a state where it can move to the stop operation section 90.

As shown in FIG. 7, the operation timing adjusting mechanism (44, 106, 116, 142, 144, 146,
148) is configured as a toothless gear, and is attached to the mechanical chassis 10 by a shaft member 148 so as to be able to mesh with and be disengaged from the driven gear 84.
Further, an operation pin 118 is protrudingly provided on the back surface side of the timing adjustment gear 44 in the drawing. This operation pin 118
The timing adjusting gear 44 is configured to be positioned near the side of the locking lever 116 in a state where the timing adjusting gear 44 rotates in the direction of the arrow N and the tooth at the end of the toothless portion is engaged with the driven gear 84.

The operation timing adjusting mechanism (44, 106, 116, 142, 144, 14) configured as described above is used.
6, 148, etc.), the driven gear 84 changes from the state shown in FIG.
Is rotated by a predetermined minute angle in the direction of the arrow O, the timing adjustment gear 44 rotates in the direction of the arrow N, and the operation pin 118 rapidly rotates the locking lever 116 in the direction opposite to the arrow M. The distal end is detached from the operation follower 106 to obtain a state shown in FIG.

In the state shown in FIG. 8, the operation follower 106
Is released, the operation follower 106 and the moving operation member 98 are free to move. Therefore, the operation follower 106 is rotated in the direction opposite to the arrow L by the urging force of a spring (not shown) acting on the movement operation member 98, and at the same time, the movement operation member 98 is moved in the arrow J direction.
The magnetic head 104 where the moving operation member 98 is lowered to the lowest position moves to the standby position shown in FIG. 9 where the magnetic head 104 is separated from the magnetic tape of the cassette tape.

This operation timing adjustment mechanism (44, 10
6, 116, 142, 144, 146, 148, etc.), there is a meshing operation for operating the timing adjusting gear 44, which is a toothless gear, with the driven gear 84 at a predetermined time or disengaging at a predetermined time. Means are provided.

As shown in FIG. 16, a substantially triangular trapezoidal holding cam portion 142 is provided on the back side of the timing adjusting gear 44 to constitute the meshing operation means. A pin 144 is provided upright at a predetermined position on the front side.

In the engagement operation means, the locking lever 11
6, one linear end of the torsion spring 146 extends from the pin 144 so as to face the shaft member 148, and the torsion spring 146 presses the pin 144 shown in FIG. It is configured to bias in the direction.

Further, in the meshing operation means, the holding projection 150 is extended from a predetermined portion of the pendulum plate 58 of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.).
Is in a position where the pendulum gear 32 is engaged with the driven gear 84, the holding cam portion 142 abuts on the holding projection 150, and the missing tooth portion of the timing adjustment gear 44 is driven by the timing adjustment gear 44 corresponding to the driven gear 84. It is configured to maintain a state in which the engagement with the gear 84 is released.

The meshing operation means moves the pendulum plate 58 in the direction opposite to the arrow D so that the pendulum gear 32 is separated from the driven gear 84 from the state where the timing adjustment gear 44 and the driven gear 84 shown in FIG. When being rotated in the direction, the holding protrusion 150 is disengaged from the holding cam portion 142 and is turned by a small angle in the direction of arrow N by the urging force of the torsion spring 146. The state is shifted to a state in which meshing of the driven gear 84 from the adjacent teeth starts.

This operation timing adjusting mechanism (44, 10
6, 116, 142, 144, 146, 148, etc.), the rotational driving force is transmitted from the pendulum gear 32 of the operation switching mechanism to the driven gear 84, and the traveling mode switching mechanism (38, 8).
8, 98, 100, 106, 110, 112, etc.) during the predetermined operation from the stop operation to the play operation through the music scan operation, the toothless portion of the timing adjustment gear 44 is moved to the driven gear 84 by the meshing operation means. Correspondingly, it is set so as to keep the detached state.

Next, the operation timing adjusting mechanism (44, 1
06, 116, 142, 144, 146, 148, etc.) after the locking lever 116 is locked to the end of the operation follower 106 on the driven pin 110 side.
When the pendulum plate 58 is rotated to transmit the rotational driving force by engaging the tape drive gear 2 with the tape running gear 36 of the tape drive mechanism (36, 184, 186, etc.), the engagement operation means shown in FIG. The operation of shifting from the disengaged state to the state of starting engagement shown in FIG. 17 is performed.

Therefore, the operation timing adjusting mechanism (4)
4, 106, 116, 142, 144, 146, 148
), The driven gear 84 and the timing adjustment gear 44 are in a state of beginning to engage during the play operation, so that the operation switching mechanism (14, 50,
52, 54, 58, and 72) engage the pendulum gear 32 with the driven gear 84 and start to rotate the driven gear 84, and the rotation of the driven gear 84 causes the timing adjustment gear 44 to rotate.

Therefore, the traveling mode switching mechanism (38, 8)
8, 98, 100, 106, 110, 112, etc.).
6, 142, 144, 146, 148, etc.), the switching operation of the running mode can be completed at the moment when the play operation shifts to the stop operation at a predetermined timing.

Therefore, as can be seen from FIG. 1, the drive motor 12 which has been rotated in the direction of arrow B for the play operation of the tape recorder is changed to the direction of arrow A in order to perform the stop operation of the tape recorder. When the hub drive gears 46, 4
Since the capstan shafts 28 and 30 integrated with the shaft 8 are reversed and the play state has not yet been switched, the capstan shafts 28 and 30 are not rotated.
Alternatively, since the pinch rollers 152 or 154 are rolling at 30, it is possible to prevent the magnetic tape from being pulled out of the tape cassette and causing jamming.

Further, as described above, the traveling mode switching mechanism (38, 88, 98, 100, 106, 110, 112)
Operation timing adjustment mechanism (4)
4, 106, 116, 142, 144, 146, 148
), The operation timing adjustment mechanism (44, 106, 116, 142, 144, 1
46, 148, etc.).

That is, during the operation of the follower in the cam mechanism, the follower is operated by the operation timing adjusting mechanism (44, 106, 116, 1) at the position where the lift on the cam curve becomes the peak.
42, 144, 146, 148, etc.), and after the cam advances by a required amount, the operation timing adjusting mechanism (44, 106, 116, 142, 144, 14) at a predetermined timing.
6, 148, etc.) release the follower, so that the operation of the mechanism linked to the follower can be instantaneously performed at a predetermined timing and in a mechanical mechanism.

Further, if a precise and quick operation is to be performed only by the cam mechanism, the phase of the cam curve must be made accurate and the assembly must be performed with high accuracy, and the apparatus becomes expensive. But,
An operation timing adjustment mechanism (44, 106, 1) is added to the cam mechanism.
16, 142, 144, 146, 148, etc.), the production accuracy is not so much required and the production can be performed at low cost.

Therefore, the operation timing adjusting mechanism (44,
106, 116, 142, 144, 146, 148, etc.)
Since the predetermined operation can be accurately performed by the mechanical operation described above, it is suitable as a configuration for removing the variation of the operation timing when electrically controlling.

The operation timing adjusting mechanism (44, 1
06, 116, 142, 144, 146, 148, etc.)
Uses a toothless gear, so that when mechanically operated at a predetermined timing, the operation can be started immediately, and the operating force at that time can be set to a large value. Positioning in the assembled state can be performed accurately and easily.

Although not shown, the traveling mode switching mechanism (38, 88, 98, 100, 106, 110, 112)
And the like, when the second cam gear 38 is continuously rotated in the direction of arrow K and the transition from the play operation to the stop operation is performed, the operation timing adjustment mechanism (44, 106, 116,
142, 144, 146, 148, etc.)
6 is released, and the traveling mode switching mechanism (38, 88, 98, 100, 106, 1) is released.
(10, 112, etc.). The operation of shifting from the play operation to the stop operation is performed by an operation timing adjustment mechanism (44, 106, 116, 142, 144, 1).
46, 148, etc.), there is an error in the drive mode switching operation timing, and the operation may be slower than when the drive mode switching operation is performed instantaneously at a predetermined timing.

As shown in FIGS. 5 and 10, a traveling direction switching mechanism (40, 120, 12) is provided on the mechanical chassis 10.
2, 124, 126, 128, 140, etc.). This traveling direction switching mechanism (40, 120, 122,
124, 126, 128, 140, etc.) have the third cam gear 40, the intermediate link 120, and the switching member 122.

The third cam gear 40 has a cam structure for an interlocking mechanism (42, 130, 114, etc.) and a cam structure for the intermediate link 120 on both flat portions of the toothless gear having missing teeth at symmetric positions with respect to the rotation center. And a cam structure. The third cam gear 40 is pivotally mounted on the mechanical chassis 10 so that the third cam gear 40 can be engaged with or disengaged from the second cam gear 38 by the missing tooth portion. Third cam gear 4
0 is determined by an interlocking mechanism (42, 130, 114, or the like) that operates at a predetermined timing from a state in which the tooth missing portion is disengaged corresponding to the second cam gear 38.
An operation is performed to shift to a state where the third cam gear 40 and the second cam gear 38 mesh with each other.

For this reason, the third cam gear 40 has an interlocking mechanism (42, 1) on the side surface opposite to the mechanical chassis 10.
30 and 114) is provided with a cam structure for an interlocking mechanism (42, 130, 114, etc.) for making the operation member 42 follow. The cam structure for the interlocking mechanism (42, 130, 114, etc.) has a small disk portion 124 protruding from the side surface of the third cam gear 40 and concentric with the rotation center, and a symmetrical position with respect to the rotation center of the small disk portion 124. To each of the small protrusion-shaped stoppers 1
26, and a small parallelogram driven portion 128 is disposed obliquely at a predetermined position on the outer peripheral side of the stopper portion 126.

The operating member 42 of the interlocking mechanism (42, 130, 114, etc.) is formed in a plane L-shape, and its bent portion is mounted on the mechanical chassis 10 with a shaft pin. further,
A tension coil spring 130 is provided between the intermediate portion of the one arm portion 132 of the operation member 42 and the mechanical chassis 10,
The operation member 42 is urged to rotate in the direction of arrow Q.

One arm 13 of this operating member 42
The free end of the second cam gear 38 extends on the rotation trajectory of the operation column 114 on the back side of the second cam gear 38, and the operation member 42 is moved in the opposite direction to the arrow Q while the second cam gear 38 makes one rotation. It is configured to perform a kicking operation. At the free end of the other arm portion 134 of the operation member 42, a driven pin 136 facing the cam structure for the interlocking mechanism (42, 130, 114, etc.) is protruded.

This interlocking mechanism (42, 130, 114, etc.)
As shown by the thin line in FIG. 6, when the missing tooth portion of the third cam gear 40 is disengaged corresponding to the second cam gear 38, the driven pin 136 is
Hits the stopper 126 on the outer periphery of the third cam gear 40
Is prevented from rotating in the direction of arrow R, and the engagement is maintained.

In this state, the second cam gear 38 rotates in the direction of arrow K, and as shown in FIG.
When the user presses the button 32, the operation member 42 is turned in the direction opposite to the arrow Q, and the third cam gear 40 is turned in the direction of the arrow R as the driven pin 136 hits the driven portion 128 and slides on its oblique side. Then, the tooth at the end of the missing tooth portion of the third cam gear 40 is engaged with the second cam gear 38, and the state is shifted to a state where the third cam gear 40 and the second cam gear 38 are engaged.

Thus, the third cam gear 40 rotates and stops until the second cam gear 38 reaches the next missing tooth portion and disengages from each other in conjunction with the rotation of the second cam gear 38. During this operation, the operation member 42 is
The operation column 114 is disengaged from one of the arms 132 and the arrow Q
And the driven pin 136 slides on the outer peripheral surface of the small disk portion 124.

In this state, when the third cam gear 40 rotates and the second cam gear 38 reaches the missing tooth portion, the stopper 1
26 comes into contact with the driven pin 136 to stop the third cam gear 40, so that the initial state shown in FIG. 6 is restored, and the state in which the engagement between the third cam gear 40 and the second cam gear 38 is released is maintained.

As shown in FIG. 5, the traveling direction switching mechanism (4
0, 120, 122, 124, 126, 128, 140
The third cam gear 40 has a cam structure for the intermediate link 120 on the back side facing the mechanical chassis 10. The cam structure for the intermediate link 120 is formed as a ring-shaped cam groove 140 having a closed curve eccentric from the rotation center of the third cam gear 40.

The intermediate link 120 interlocked with the third cam gear 40 is in the form of a plate, and has an intermediate portion pivotally mounted on the mechanical chassis 10 with a shaft pin. This intermediate link 120
The driven pin 138 erected at one end of the cam groove 1
40 so that the third cam gear 4
It is linked to 0. Thereby, when the third cam gear 40 rotates 180 degrees from the state of FIG. 5, the intermediate link 120 swings in the direction of arrow S to reach the state of FIG. Further, when the third cam gear 40 rotates 180 degrees from the state of FIG. 9, the intermediate link 120 swings in the direction opposite to the arrow S and returns to the state of FIG.

The other end of the intermediate link 120 is
The end of the switching member 122 is connected by a connecting pin. The switching member 122 is a long plate-shaped member, and guide standing pieces 158 erected on the mechanical chassis 10 are inserted into respective long grooves 156 formed at both ends thereof so as to be slidable in the direction of arrow T. It is installed.

The switching member 122 is provided with cam holes 160 and 162 for interlocking the pinch rollers 152 and 154, respectively. As shown in FIG. 15, each of the cam holes 160 and 162 has a capstan abutment side 196 at a position close to the corresponding capstan shafts 28 and 30, and a dissociation side at a position further away therefrom. 198 are provided.

Each of the pinch rollers 152 and 154 is
Each of the torsion coil springs 202 is swingably mounted on the mechanical chassis 10 and mounted on the mechanical chassis 10.
Each pinch roller 152, 1 (shown in FIGS. 2 and 3)
54 are urged in a direction of contacting the corresponding capstan shafts 28, 30 respectively. Each pinch roller 152,
154 are provided with interlocking pins 200, respectively.
60,162. Therefore, depending on the operation position of the switching member 122, any of the pinch rollers 15
2, 154 correspond to the corresponding capstan shafts 28, 3
It is in a state where it can be brought into contact with 0.

Each of the pinch rollers 152 and 154 is
It is operated in conjunction with the operation of the moving operation member 98 described above. The movement operation member 98 is mounted on the mechanical chassis 10 so as to be movable in the direction of the arrow J as described above. The movement operation member 98 is provided with corresponding pinch rollers 152 and 154 on both sides of an end (lower end in FIG. 15) opposite to the side on which the interlocking receiving portion 100 is provided.
Is configured to face a predetermined interlocking contact portion (not shown).

When the moving operation member 98 is in the standby position where the moving operation member 98 has been moved in the direction of the arrow J or in a music scan state, the pinch rollers 152 and 154 are separated from the capstan shafts 28 and 30 to move the moving operation member 98. Is in a play state in which the switch member 122 is moved in the direction opposite to the arrow J, and the cam hole 16
The pinch roller 152 or 1 on which the interlocking pin 200 can face the capstan contact side 196 at 0 or 162
54 is configured to be pressed against the capstan shaft 28 or 30.

As shown in FIG. 15, the rotational driving force transmitted from the tape driving mechanism (36, 184, 186, etc.) is increased or decreased on the mechanical chassis 10 in conjunction with the operation of the switching member 122. Any hub drive gear 4 in the state
6, 48 are provided with a connection switching mechanism for selectively connecting or disconnecting.

As shown in FIG. 14, the connection switching mechanism includes a connection operation member 164 for one of the hub drive gears 46.
And a connection operation member 166 for the other hub drive gear 48 and a connection operation member 170 for the intermediate intermediate gear 168 as shown in FIG. As shown in FIG. 14, the connection operation member 164 for one hub drive gear 46 has an intermediate portion of the long plate-shaped portion pivotally mounted on the mechanical chassis 10 with a pivot pin, and a fan-shaped portion at the distal end thereof. Is formed.

The arc of the fan-shaped portion of the connection operation member 164 has a guide piece 172 erected on the mechanical chassis 10.
Are slid in contact with each other to guide the rotation operation of the connection operation member 164. Further, as shown in FIG. 11, a connection gear 174 for speed increase, which can be engaged with and disengaged from the hub drive gear 46, is mounted on the distal end of the connection operation member 164.

As shown in FIG. 15, a connection operation member 166 for the other hub drive gear 48 has an intermediate portion of the long plate-like portion pivotally mounted on the mechanical chassis 10 with a pivot pin. A small sector is formed.

The arc of the fan-shaped portion of the connection operation member 166 has a guide piece 176 erected on the mechanical chassis 10.
Are slid in contact with each other to guide the rotation operation of the connection operation member 166. Further, as shown in FIG. 15, a speed-increasing connection gear 178 meshable with and detachable from a connection intermediate gear 177 meshing with the hub drive gear 48 is axially mounted on a distal end portion of the connection operation member 166.

In order that these connection operation members 164 and 166 can be operated in conjunction with the switching member 122, the connection operation members 164 and 166 are provided on the opposite sides of the base end portions of the connection operation members 164 and 166 on the mechanical chassis 10. The corresponding linear ends of the torsion coil spring 180 to which the coil portions are fixed are locked, and the connecting operation members 164 and 166 are urged to rotate in the direction approaching each other. At the same time, the switching member 122 is provided with two stop projections 190 projecting therefrom at predetermined positions, and receives the respective base ends of the connection operation members 164 and 166 rotated by the torsion coil spring 180, and The operation members 164 and 166 are stopped so as not to rotate further in the opposite direction.

The connecting operation member 170 for the intermediate intermediate gear 168 is formed in a long plate shape, and the intermediate portion thereof is connected to the shaft pin 1.
At 82, a connection gear 184 is mounted on the mechanical chassis 10 at the end thereof. This connecting gear 1
A reduction gear 186 is provided between the intermediate gear 84 and the intermediate intermediate gear 168 so as to reduce the speed and interlock with the intermediate intermediate gear 168 (see FIG. 11).

The connection operation member 170 is a switching member 122
Connection operation member 1 so that it can be operated in conjunction with
Locking pieces 188 project from both ends of the base end of the projection 70. At a predetermined position of the switching member 122, a coil portion of the torsion coil spring 192 is engaged and installed. The torsion coil spring 192 thus installed is
The linearly extending portions at both ends are connected to the switching member 122.
Operating range restricting pieces 19 erected at predetermined positions of
4 and further between two locking pieces 188 of the connection operation member 170.

The connection operation member 170 is operated in conjunction with an operation mechanism (not shown) provided on the movement operation member 98, so that the connection gear 184 meshes with the hub drive gear 46 or 48, , 48 to be moved to a neutral state.

In this tape recorder, a stop operation,
Each operation such as a rewind operation, a forward play operation, a fast forward operation and a reverse play operation is performed by a running mode switching mechanism (38, 88, 98, 100, 106, 110, 1).
12) and the traveling direction switching mechanism (4).
0, 120, 122, 124, 126, 128, 140
Etc.) with the third cam gear 40.

That is, the cam mechanism of the second cam gear 38 in the traveling mode switching mechanism moves the moving operation member 98 provided with the magnetic head 104 to the standby position (stop position), the music scan position (fast forward or rewind position) or the play position. Selectively move to.

The cam mechanism of the third cam gear 40 in the traveling direction switching mechanism switches the traveling direction of the magnetic tape of the tape cassette by a connection switching mechanism interlocked with the switching member 122.

Further, when the moving operation member 98 is set to the music scan position, the moving operation member 98 is set.
The connection switching mechanism sets the magnetic tape to a state in which the magnetic tape is fast-forwarded or rewinded. When the moving operation member 98 is set to the play position, the connection switching mechanism is connected to the moving operation member 98 to set the state in which the magnetic tape runs for forward play or the state in which the magnetic tape runs for reverse play. I do.

As described above, since a large number of operations such as the stop operation, the rewind operation, the forward play operation, the fast-forward operation and the reverse play operation can be executed by combining the operations of the two cam mechanisms, one operation is performed. Compared to the case where the cam is configured to perform these many operations, the shape of the cam curve used for the cam mechanism can be simplified and the cost can be reduced. At the same time, by combining the operations of the two cam mechanisms, it is possible to make room for the setting conditions that can be set for control and to expand the degree of freedom in designing for control.

The driving mode switching mechanism (38, 88, 98,
100, 106, 110, 112, etc.) and traveling direction switching mechanisms (40, 120, 122, 124, 126, 128,
140 etc.) is an interlocking mechanism (42, 130, 114 etc.)
Connected by This interlocking mechanism (42, 13
0, 114, etc.) are running mode switching mechanisms (38, 88,
98, 100, 106, 110, 112, etc.), the second cam gear 38 and the third cam gear 40 are directly operated with a predetermined timing, so that the operation timing of the second cam gear 38 and the third cam gear 40 Can be set appropriately and can be operated stably.

On the other hand, for example, the running mode switching mechanism (38, 88, 98, 100, 106, 110, 112)
Etc.) and the traveling direction switching mechanism (40, 120, 122, 12)
4, 126, 128, 140, etc.) are controlled by different control devices, respectively, and the traveling mode switching mechanism (38, 88, 98,
100, 106, 110, 112, etc.) and traveling direction switching mechanisms (40, 120, 122, 124, 126, 128,
140, etc.), the running mode switching mechanisms (38, 88, 98,
100, 106, 110, 112, etc.) and traveling direction switching mechanisms (40, 120, 122, 124, 126, 128,
140, etc.) at a predetermined timing, and it is difficult to operate them, and it is unavoidable that the operation becomes unstable as a whole. However, according to the configuration of the interlocking mechanism (42, 130, 114, etc.) in the present embodiment, appropriate operation can be easily guaranteed.

In the tape recorder of this embodiment, the operation control of the mechanical device driven by the drive motor 12 described above is controlled by a control unit using a microcomputer (not shown) and various sensors installed in various places. The motor 12 is configured to perform a forward rotation, a reverse rotation, or a stop operation.

Next, the operation and operation of the tape recorder according to the present embodiment configured as described above will be described.

When a user using this tape recorder inserts a generally used cassette tape from the entrance of a tape recorder housing (not shown) into the cassette holding section 80 which is in a standby state as shown in FIGS. 2 and 4. ,
The control unit that detects the cassette tape by the sensor rotates the drive motor 12 in the direction of arrow A.

Then, the loading mechanism (34, 62,
64, 66, 68, 70, 76, etc.), the first cam gear 34 is rotated in the direction of arrow G, and the cassette is moved while the driven pin 76 reaches the relief groove 70B from the substantially small circular groove periphery 70A. The tape is pulled into the cassette holding portion 80 by the operation lever 82, and the cassette tape is set at a predetermined loading position on the mechanical chassis 10 in FIG.
When the sensor detects that the state has been reached, the loading operation is completed.

Next, when the user turns on a rewind (REW) switch of a tape recorder (not shown), the control unit further causes the drive motor 12 to continue rotating in the direction of arrow A. Then, as shown in FIG. 5, the pendulum plate 58 rotates in the direction of arrow D with the rotation of the large-diameter intermediate gear 54, the pendulum gear 32 meshes with the driven gear 84, and the second cam gear 38
Starts rotating in the direction of arrow K.

By the rotation of the second cam gear 38, the operating column 114 kicks one arm 132 and pushes the operating member 42 in the direction opposite to the arrow Q by a predetermined small angle. This operation member 4
By the rotation of the second cam gear 3, the driven pin 136 kicks the driven portion 128 to rotate the third cam gear 40 in the direction of the arrow R, and the second cam gear 3
The state shown in FIG.

From the state shown in FIG. 5, the third cam gear 40
Interlocking with the rotation of the second cam gear 38, the third cam gear 40 rotates substantially half way in the direction of arrow R, the other missing tooth portion of the third cam gear 40 reaches the corresponding position of the second cam gear 38, and the meshing of these two is released. At the same time, the driven pin 136 of the operation member 42 comes into contact with the stopper 126 to stop the third cam gear 40.

The driven pin 138 is driven by the cam groove 140 which rotates substantially half the circumference integrally with the third cam gear 40, whereby the intermediate link 120 rotates in the direction of arrow S, and the switching member 12
2 is moved along the direction of arrow T to the position shown in FIG.

The operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) interlocked with the drive motor 12 operates the second cam gear 38 in a state where the pendulum gear 32 is meshed with the driven gear 84. Rotate by an angle. As a result, the driven pin 110 that follows the operation switching cam groove 88 of the second cam gear 38 is moved to the stop operation portion 90 of the operation switching cam groove 88.
The operation follower 106 rotates in the direction of the arrow L in conjunction with the operation of moving from the to the music scan operation section 94, and the moving operation member 98 connected by the operation shaft 112 and the interlock receiving section 100 to the arrow J. And pull up in the opposite direction.

The moving operation member 98 and the switching member 12
2, the connection operation member 166 is swung to engage the connection gear 178 with the reduction gear 186, and the connection operation member 170 is connected to the connection intermediate gear 1 by the connection gear 184.
77 and the hub drive gear 48 are set to the neutral position where they are separated.

When the control unit detects that the above-mentioned state has been reached by a sensor (not shown), it rotates the drive motor 12 in the direction of arrow B in the reverse direction, and then the operation switching mechanism (14, 50, 5).
2, 54, 58, 72, etc.), the intermediate gear 54 rotates in the direction opposite to the arrow D, the pendulum plate 58 is rotated, and the braking member 61 comes into contact with the stop control unit 102 of the moving operation member 98. And the pendulum gear 32 moves to the tape running gear 3.
6 and stops in the rewind (REW) state shown in FIG.

In the state shown in FIG.
Is rotated in the direction of arrow B by the pendulum gear 32 of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) from the tape drive mechanism (36, 184, 186).
Etc.) through a tape running gear 36, a reduction gear 186, a connection gear 178, and a connection intermediate gear 177, and transmitted to a hub drive gear 48. To perform a rewind operation.

Next, when the user turns on a forward play (FWD PLAY) switch of the tape recorder (not shown), the control unit rotates the drive motor 12 in the direction of arrow A.

Then, although not shown, the pendulum plate 58 rotates in the direction of arrow D with the rotation of the large-diameter intermediate gear 54, the pendulum gear 32 meshes with the driven gear 84, and the second cam gear 3
8 is rotated in the direction of arrow K from the position shown in FIG. 6 to move to the position shown in FIGS.

In conjunction with the rotation of the second cam gear 38, the driven pin 110 on the operation switching cam groove 88 moves from the play operation section 92 to the switching timing setting section 96, and the operation follower 106 is moved. It turns in the direction of arrow L.

Then, the moving operation member 98 interlocked with the operation of the operation follower 106 via the operation shaft 112 and the interlocking receiving portion 100 moves in the direction opposite to the arrow J, and FIGS.
The game moves to the play position shown in FIG.

When the driven pin 110 moves to the vicinity of the vertex of the switching timing setting section 96, the operation timing adjusting mechanism (44, 106, 116, 142, 144,
146, 148, etc.) with the arrow M
And the tip of the locking lever 116 is brought into contact with the portion of the operation follower 106 near the driven pin 110 to stop the operation follower 106 from rotating in the direction of arrow O. The play (FWD PLAY) state is maintained.

The operation timing adjusting mechanism (44, 1
06, 116, 142, 144, 146, 148, etc.), the second cam gear 38 is slightly rotated, and the driven pin 110 is set to a state in which the driven pin 110 can immediately move on the stop operation unit 90. And
Next, Fig. 1 is ready to go to the stop state.
The state shown in FIG. Then, when the control unit that detects this state by the sensor rotates the drive motor 12 in the reverse direction by rotating the drive motor 12, the operation switching mechanism (14, 50, 52, 54,
The large-diameter intermediate gear 54 (58, 72, etc.) rotates in the direction opposite to the arrow D, rotates the pendulum plate 58, and the braking member 61 comes into contact with the stop control unit 102 of the moving operation member 98 to stop. 7 and 14, the pendulum gear 32 meshes with the tape running gear 36.
(PLAY) state.

At this time, the connection operation member 170 is rotated counterclockwise in conjunction with the operation of the movement operation member 98 and the switching member 122, and the connection gear 184 is connected to the hub drive gear 48.
The state shown in FIG.

The cam hole 16 of the switching member 122
Since the interlocking pin 200 of one pinch roller 152 corresponds to the capstan contact side portion 196 of No. 0, the one pinch roller 152 presses the corresponding capstan shaft 28 via the magnetic tape of the tape cassette. I do.

In the state shown in FIGS. 7 and 14, the rotational driving force by which the drive motor 12 rotates in the direction of arrow B is applied to the pendulum gear of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.). 32 to the tape drive mechanism (36, 184, 1
86) through the tape running gear 36, the reduction gear 186, and the connection gear 184, and is transmitted to the hub drive gear 48, and the hub drive gear 48 rotates a predetermined hub of a tape cassette (not shown) into which the hub drive gear 48 is inserted.

At the same time, as shown in FIG. 1, a capstan shaft 28 which rotates integrally with the capstan pulley 16 to which the rotational driving force is transmitted via the belt 24 from the output pulley 20 of the drive motor 12 and one of the capstan shaft 28 By rolling with the magnetic tape of the tape cassette sandwiched between the pinch roller 152 and the magnetic tape, the magnetic tape is fed at a constant speed to perform a forward play operation.

In this tape recorder, an operation switching mechanism (14, 50, 5) for forward play operation is provided.
2, 54, 58, 72, etc.) are running mode switching mechanisms (3
8, 88, 98, 100, 106, 110, 112, etc.)
, And thereafter the operation switching mechanism (14, 5)
0, 52, 54, 58, 72, etc.) is the tape drive mechanism (3
6, 184, 186, etc.)
Operation timing adjustment mechanism (44, 106, 116, 14)
2, 144, 146, 148, etc.) are brought into a standby state in which the tooth portion at the end of the missing tooth portion meshes with the driven gear 84, and preparations are made for a transition to the next stop operation.

Next, when the user presses the stop (STOP) switch of the tape recorder (not shown) during the forward play operation, the control unit rotates the drive motor 12 in the direction of arrow A to cause the operation switching mechanism (14, 50). , 52, 54, 5
8, 72) in the direction of arrow D to move the pendulum gear 32 from the state shown in FIGS. 7 and 14 to the state shown in FIG.

In the state shown in FIG. 17, the pendulum gear 3
2 meshes with the driven gear 84, the rotational driving force of the drive motor 12 is transmitted from the pendulum gear 32 to the driven gear 84, and as soon as the driven gear 84 starts rotating in the direction of the arrow O, the timing adjustment gear 44 is moved in the direction of the arrow N. To start rotating.

Then, the operation timing adjusting mechanism (44,
106, 116, 142, 144, 146, 148, etc.)
When the timing adjustment gear 44 is slightly rotated in the direction of arrow N, the operation pin 118 (provided on the back side of the pin 144 in FIG. 17) kicks the locking lever 116 so as to rotate in the direction opposite to the arrow M. The locking lever 116 is operated by the operation follower 10.
Remove from 6.

As a result, the operation follower 106 is free to rotate in the direction opposite to the arrow L, so that the moving operation member 98 that has been restrained by the operation follower 106 up to this point is actuated by the urging force of a spring (not shown). The operation follower 106 moves in the direction of the arrow J while rotating in the direction opposite to the arrow L, and
The magnetic head 104 provided at 8 moves to the stand-by position shown in FIG. 9 separated from the magnetic tape of the cassette tape and enters a stop state, and the control unit that detects this state by the sensor stops the drive motor 12.

At the start of this operation, since the rotation direction of the capstan shafts 28 and 30 is reversed, the direction in which the magnetic tape runs on the capstan shafts 28 and 30 is the direction in which the magnetic tape runs in the forward play state. And the opposite.

However, immediately after the start of the stop operation, the pinch rollers 152, 154 and the capstan shafts 28, 30 are separated from each other, the operation of running the magnetic tape of the cassette tape is stopped, and the pendulum gear 32 is moved Since the hub drive gear 48 is stopped after being separated from the traveling gear 36, it is possible to prevent the magnetic tape from being pulled out from the tape cassette and loosened.

In the stop state shown in FIG. 9, since the stop control unit 102 of the moving operation member 98 is out of the rotation trajectory of the braking member 61, the pendulum gear 32 is connected to the loading mechanism (34, 62, 64, 66). , 68, 70, 76
Etc.) in a state where it is possible to shift to an operation of meshing with the first cam gear 34 and loading.

Next, when the user turns on the fast-forward (FF) switch of the tape recorder (not shown), the control unit
The drive motor 12 is further rotated in the direction of arrow A. Then, as shown in FIG. 9, the pendulum gear 32 meshes with the driven gear 84, and rotates the second cam gear 38 in the arrow K direction.

By the rotation of the second cam gear 38, the operating column 114 kicks one arm 132 and pushes the operating member 42 in the direction opposite to the arrow Q by a predetermined small angle. This operation member 4
By the rotation of the second cam gear 3, the driven pin 136 kicks the driven portion 128 to rotate the third cam gear 40 in the direction of the arrow R, and the tooth corresponding to the end of the other missing tooth portion is moved to the second cam gear 3
The state shown in FIG.

From the state shown in FIG.
Rotates substantially half way in the direction of arrow R in conjunction with the rotation of the second cam gear 38, one of the toothless portions of the third cam gear 40 reaches the corresponding position of the second cam gear 38, and the meshing of these two members is released. At the same time, the driven pin 136 of the operation member 42 comes into contact with the stopper 126 to stop the third cam gear 40.

The driven pin 138 is driven by the cam groove 140 which rotates substantially half-circle with the third cam gear 40, and the intermediate link 120 rotates in the direction opposite to the arrow S, and the switching member 122 is moved in the direction of the arrow T. Along to the position shown in FIG.

An operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) interlocked with the drive motor 12 operates the second cam gear 38 in a state where the pendulum gear 32 is meshed with the driven gear 84. Rotate by an angle. As a result, the driven pin 110 that follows the operation switching cam groove 88 of the second cam gear 38 is moved to the stop operation portion 90 of the operation switching cam groove 88.
The operation follower 106 rotates in the direction of the arrow L in conjunction with the operation of moving from the to the music scan operation section 94, and the moving operation member 98 connected by the operation shaft 112 and the interlock receiving section 100 to the arrow J. And pull up in the opposite direction.

The moving operation member 98 and the switching member 12
The connection operation member 164 is swung in conjunction with the operation 2 to cause the connection gear 174 to mesh with the reduction gear 186 and the connection gear 174 to mesh with the hub drive gear 46.

Further, the connection operation member 170 is moved, and the connection gear 184 is moved to the hub drive gear 46 or the connection intermediate gear 177.
And set to a neutral position separated from the hub drive gear 48.

When the control unit detects the predetermined state at this time by the sensor, the control unit rotates the drive motor 12 in the reverse direction by rotating the drive motor 12 in the direction of the arrow B, and the operation switching mechanism (14, 50, 52,
54, 58, 72) rotate in the direction opposite to the arrow D, and rotate the pendulum plate 58 to rotate the braking member 6.
1 is brought into contact with the stop control unit 102 of the moving operation member 98 and stopped, and the pendulum gear 32 meshes with the tape running gear 36, thereby setting a fast-forward (FF) state shown in FIG.

In the state shown in FIG.
2 is rotated in the direction of arrow B by the pendulum gear 32 of the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) to the tape driving mechanism (36, 184, 186).
) Through the tape running gear 36, the reduction gear 186, and the connection gear 174, and is transmitted to the hub drive gear 46, and the hub drive gear 46 is rotated by rotating a predetermined hub of a tape cassette (not shown) into a fast-forward operation. Execute

Next, when the user turns on the reverse play (RVS PLAY) switch of the tape recorder (not shown), the control section rotates the drive motor 12 in the direction of arrow A.

Then, although not shown, the pendulum plate 58 is
As the large-diameter intermediate gear 54 rotates from the position 2, an arrow D
The second cam gear 38 is rotated in the direction of arrow K from the position shown in FIG. 12 to the position shown in FIGS. 12 and 15.

In conjunction with the rotation of the second cam gear 38, the driven pin 110 on the operation switching cam groove 88 moves from the play operation unit 92 to the switching timing setting unit 96, and the operation follower 106 is turned on. It turns in the direction of arrow L.

Then, the moving operation member 98 interlocked with the operation of the operation follower 106 via the operation shaft 112 and the interlocking receiving portion 100 moves in the direction opposite to the arrow J, and the movement shown in FIGS. Move to position.

Further, in the same manner as in the forward play operation shown in FIG. 7, the operation follower 106 has an operation timing adjustment mechanism (44, 106, 116,
142, 144, 146, 148, etc.), the operation follower 106 is kept in the reverse play state in which the operation follower 106 is prevented from rotating in the direction of arrow O.

The operation timing adjusting mechanism (44, 1
06, 116, 142, 144, 146, 148, etc.), the second cam gear 38 is slightly rotated to set the traveling mode switching mechanism (3).
8, 88, 98, 100, 106, 110, 112, etc.)
16 is ready to immediately shift to the stop state, and the control unit, which detects this state with a sensor, rotates the drive motor 12 in the direction of arrow B in the reverse direction.

Then, the operation switching mechanism (14, 50, 5)
2, 54, 58, 72, etc.), the intermediate gear 54 rotates in the direction opposite to the arrow D, the pendulum plate 58 is rotated, and the braking member 61 comes into contact with the stop control unit 102 of the moving operation member 98. And the pendulum gear 32 moves to the tape running gear 3.
6 and stops in the reverse play state shown in FIGS.

At this time, the connection operation member 170 is rotated clockwise in conjunction with the operation of the movement operation member 98 and the switching member 122, and the connection gear 184 is connected to the connection intermediate gear 177.
15 to transmit the rotational driving force to the hub driving gear 48.

Further, the cam hole 16 of the switching member 122
Since the interlocking pin 200 of the other pinch roller 154 corresponds to the second capstan abutment side 196, the other pinch roller 154 is pressed against the corresponding capstan shaft 30 via the magnetic tape of the tape cassette. I do.

In the state shown in FIGS. 12 and 15, the rotational driving force by which the drive motor 12 rotates in the direction of arrow B is applied to the operation switching mechanism (14, 50, 52, 54, 58, 72, etc.).
From the pendulum gear 32 of the tape drive mechanism (36, 184,
186) is transmitted to the hub drive gear 46 via the tape drive gear 36, the reduction gear 186, the connection gear 184, and the connection intermediate gear 177, and a predetermined hub of a tape cassette (not shown) into which the hub drive gear 46 is inserted is inserted. Rotate.

At the same time, as shown in FIG. 1, the capstan shaft 30 which rotates integrally with the capstan pulley 18 to which the rotational driving force is transmitted from the output pulley 20 of the driving motor 12 via the belt 24, and the other end. By rolling with the magnetic tape of the tape cassette sandwiched between the pinch roller 154, the magnetic tape is fed at a constant speed to perform a reverse play operation.

In this tape recorder, similarly to the forward play operation, an operation switching mechanism (14, 50, 52, 54, 58, 72, etc.) for reverse play operation.
Are running mode switching mechanisms (38, 88, 98, 100, 1).
06, 110, 112, etc.), followed by an operation switching mechanism (14, 50, 52, 54, 58, 72).
) When connecting to the tape drive mechanism (36, 184, 186, etc.).
4, 106, 116, 142, 144, 146, 148
) Is in a standby state in which the tooth portion at the end of the missing tooth portion meshes with the driven gear 84.
Preparations are made for shifting to the next stop operation.

Next, when the user presses the stop (STOP) switch of the tape recorder (not shown) during the reverse play operation, the control unit rotates the drive motor 12 in the direction of arrow A to cause the operation switching mechanism (14, 50). , 52, 54, 5
8, 72) in the direction of arrow D to move the pendulum gear 32 from the state shown in FIGS. 12 and 15 to the state shown in FIG.

Then, as in the case of the forward play described above, the pendulum gear 32 meshes with the driven gear 84 in the state shown in FIG. 17, and the driven gear 84 rotates in the direction of the arrow O by the rotational driving force of the driving motor 12. Immediately after starting, the timing adjustment gear 44 starts rotating in the direction of arrow N.

Then, the operation timing adjusting mechanism (44,
106, 116, 142, 144, 146, 148, etc.)
When the timing adjustment gear 44 is slightly rotated in the direction of arrow N, the operation pin 118 (provided on the back side of the pin 144 in FIG. 17) kicks the locking lever 116 so as to rotate in the direction opposite to the arrow M. The locking lever 116 is operated by the operation follower 10.
Remove from 6.

As a result, the operation follower 106 is freely rotatable in the direction opposite to the arrow L, so that the moving operation member 98 that has been restrained by the operation follower 106 up to this point is actuated by the urging force of a spring (not shown). The operation follower 106 moves in the direction of the arrow J while rotating in the direction opposite to the arrow L, and
The magnetic head 104 provided at 8 moves to the standby position shown in FIG. 13 in which it is separated from the magnetic tape of the cassette tape, enters a stop state, and the control unit that detects this state by the sensor stops the drive motor 12.

At the start of this operation, as in the case of forward play, the capstan shafts 28, 30
The direction in which the magnetic tape runs is opposite to the direction in which the magnetic tape runs in the forward play state, but immediately after the start of the stop operation, the pinch rollers 152 and 154 are released from the capstan shafts 28 and 30, and the magnetic tape runs. Is stopped. At the same time, the pendulum gear 32
Is separated from the tape running gear 36 and the hub driving gear 4
8 stops, so that the magnetic tape can be prevented from being pulled out from the tape cassette and loosened.

The stop state shown in FIG. 13 has been returned to the initial state shown in FIG. Therefore, the pendulum gear 32 is connected to the loading mechanism (34, 62,
64, 66, 68, 70, 76, etc.)
It is in a state where it can shift to the operation of loading by meshing with.

In the tape recorder of this embodiment, the operation mode can be set arbitrarily. That is, the operation mode is the running mode switching mechanism (38, 88, 98, 10).
0, 106, 110, 112, etc.) can be set according to the rotational position of the second cam gear 38. When the user presses a desired switch, the control unit moves the drive motor 12 in the direction of arrow A in response to the command signal. To the operation switching mechanism (1).
4, 50, 52, 54, 58, 72, etc.) pendulum gear 3
The second cam gear 38 is rotated via the second cam gear 2, and the traveling direction switching mechanism (40, 120, 122, 124, 1
26, 128, 140, etc.) and the connection switching mechanism is operated.

In the tape recorder of the present embodiment, the rotation of the second cam gear 38 changes the stop operation from the loading operation to the rewinding operation, the forward play operation, and the stop operation from the loading operation.
A routine for returning to the original stop operation via the fast-forward operation and the reverse play operation is repeated.

Thus, the control unit of the tape recorder
When various sensors detect that the operation mode desired by the user has been reached while rotating the cam gear 38, the drive motor 12 is stopped or reversely rotated to execute the operation mode desired by the user.

Accordingly, some operation modes are skipped and the operation mode desired by the user is executed.
The appearance of the tape recorder is such that when the user presses a desired switch, the desired operation mode is immediately executed.

As described above, in the tape recorder of the present embodiment, the single drive motor 12 is rotated forward or backward,
A plurality of operation modes can be selectively executed by an operation of stopping at a required timing detected by a sensor or the like.

That is, since a mechanism for selectively executing a plurality of operation modes in a tape recorder can be configured by using a single drive motor 12, a conventional drive system using a plurality of expensive drive devices such as the drive motor 12 and an actuator is used. Inexpensive products can be provided as compared with expensive tape recorders.

[0180]

According to the tape recorder of the present invention, the position of the magnetic head relative to the position of the recording / reproducing magnetic tape is selected by the running mode switching mechanism in conjunction with the operation switching cam of the cam gear whose rotation is controlled. The traveling direction switching mechanism interlocks with the cam of the cam gear whose rotation operation is controlled by the traveling direction switching mechanism to switch the traveling direction of the magnetic tape, and the mechanism in each operation set by the traveling mode switching mechanism. Since various operation states can be set by associating the state with the state of the mechanism in each operation set by the traveling direction switching mechanism, many operations of the tape recorder can be performed by operating two cam mechanisms. Can be executed in combination, so that the shape of the cam curve used for each cam mechanism can be simplified, and it can be manufactured at low cost. At the same time, by combining the operations of the two cam mechanisms, there is an effect that the setting conditions that can be set for the control have a margin and the degree of design freedom for the control can be expanded. Further, there is an effect that electric components such as a plunger using an expensive solenoid can be reduced and a tape recorder can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing each operation mechanism mounted on a mechanical chassis of a tape recorder according to an embodiment of the present invention.

FIG. 2 is an overall perspective view showing a state of the cassette holding operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention at the time of a tape cassette in / out operation.

FIG. 3 is an overall perspective view showing an operation state when a tape cassette is loaded in each operation mechanism for holding a cassette mounted on a mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 4 is a main part plan view showing a state during a loading operation of each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 5 is a plan view of a principal part showing a state when an operation state is switched in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 6 is a main part plan view showing a rewinding operation state of each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 7 is a plan view of a main part showing a forward play operation state of each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 8 is a main part plan view showing a transition state to a stop operation in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 9 is a main part plan view showing a state of each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention at the time of a stop operation.

FIG. 10 is a main part plan view showing a state when an operation state is switched in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 11 is a plan view of a principal part showing a state during a fast-forward operation in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 12 is a main part plan view showing a state during a reverse play operation in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 13 is a plan view of a main part showing a transition state to a stop operation in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 14 is a main part plan view showing a connection switching mechanism in a forward play operation state in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 15 is a main part plan view showing a connection switching mechanism in a reverse play operation state in each operation mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention.

FIG. 16 is an enlarged plan view of a main part showing a state immediately after the locking lever has locked the operation follower in the operation timing adjusting mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention; is there.

FIG. 17 is a diagram showing a state in which the timing adjustment gear starts to bite into the driven gear when shifting to the play state in the operation timing adjustment mechanism mounted on the mechanical chassis of the tape recorder according to the embodiment of the present invention. It is a part enlarged plan view.

[Explanation of symbols]

 Reference Signs List 10 mechanical chassis 12 drive motor 14 drive pulley 16 capstan pulley 20 output pulley 32 pendulum gear 34 first cam gear 36 tape running gear 38 second cam gear 40 third cam gear 42 operating member 44 timing adjustment gear 58 pendulum plate 70 cam groove 70A Groove periphery 70B Groove portion 72 Interlocked follower 76 Follower pin 88 Operation switching cam groove 90 Stop operation unit 92 Play operation unit 94 Music scan operation unit 96 Switching timing setting unit 98 Moving operation member 104 Magnetic head 106 Operation follower 116 Lock lever 122 Switching member 140 Cam groove 142 Holding cam portion

Claims (4)

[Claims] 1. A running mode switching mechanism for selectively moving the position of a magnetic head with respect to the position of a recording / reproducing magnetic tape in conjunction with an operation switching cam of a cam gear whose rotation is controlled, and a rotation operation controlled. A traveling direction switching mechanism for switching a traveling direction of the magnetic tape in conjunction with a cam of a cam gear; wherein a state of the mechanism in each operation set by the traveling mode switching mechanism and a setting by the traveling direction switching mechanism are set. Characterized in that various operation states can be set in relation to the state of the mechanism in each operation. 2. An operation switching cam groove of the cam gear in the traveling mode switching mechanism, wherein a stop operation section for moving the magnetic head to a stop position and a position for lightly contacting the magnetic head with the magnetic tape. 2. The tape recorder according to claim 1, further comprising an operation unit, and a play operation unit configured to move the magnetic head to a play operation position where the magnetic head comes into contact with the magnetic tape so that the magnetic head can be recorded and reproduced. 3. A cam groove for switching the traveling direction of the cam gear in the traveling direction switching mechanism is formed in a closed curve eccentric with respect to the rotation center of the cam gear of the traveling direction switching mechanism. When the driven pin reaches the position closest to the center of rotation, it is switched to one running direction, and when the driven pin reaches the position farthest from the center of rotation, it is switched to the other running direction. The tape recorder according to claim 1, wherein the tape recorder is set to: 4. A capstan shaft and one pinch roller used when performing a play operation in one traveling direction, and the other capstan shaft and another pinch roller used when performing a play operation in the other traveling direction. And one of the pinch rollers corresponding to the traveling direction switched in conjunction with the traveling direction switching operation to one or the other in the traveling direction switching mechanism, and one of the pinch rollers corresponding to the traveling direction switching mechanism. Or, the moving operation member on which the magnetic head is mounted in the traveling mode switching mechanism is set to the play operation position, with the one or the other pinch roller set by the traveling direction switching mechanism being set so as to be pressed against the other capstan shaft. Characterized in that it is configured to press against one or the other capstan shaft corresponding to the movement of Tape recorder according to any one of claims 1 to 3.