JPH065586B2 - Playback direction switching device for reciprocating tape recorder - Google Patents

Description

The present invention relates to a reciprocating tape recorder having a reproducing function in a first direction and a reproducing function in a second direction which is the opposite direction to the first direction. In particular, it relates to a playback direction switching device.

(B) Conventional technology Although an audio device called a headphone stereo, which listens to the reproduced sound of a magnetic tape by a headphone, is widespread, a tape recorder incorporated in such an audio device performs a reproducing operation for a long time. Not only the reproduction function in the first direction but also the second direction which is the opposite direction to the first direction.
A reciprocating tape recorder having a directional reproduction function is generally used. Since such a reciprocating tape recorder has a complicated structure as compared with a tape recorder having a function of performing reproduction operation in only one direction, recent tape recorders switch the rotation direction of the electric motor in accordance with the reproduction direction. This prevents the structure from becoming complicated. Further, in such a tape recorder, not only is the rotation direction of the electric motor switched according to the reproduction direction, but also the rewinding operation is performed by switching the rotation direction of the electric motor. As a reproducing direction switching device in a reciprocating tape recorder, there are a device utilizing a manual operation force and a device utilizing a suction force of a plunger, which has been recently disclosed in JP-A-60-127553. As described above, it is general that the reproduction direction is switched by utilizing the rotational force of the electric motor.

(C) Problems to be Solved by the Invention The above-mentioned publication describes a technique for switching the reproducing direction of the magnetic tape by the rotational force of the electric motor. Since the meshing operation of the switching gear, which is provided to mesh with the driving gear and to switch the reproduction direction by the rotational driving operation thereof, is controlled by the member that can be manually displaced, the structure becomes complicated. However, there is a problem that the operability is poor. The present invention is intended to provide a reproduction direction switching device that is improved in this respect.

(D) Means for Solving the Problems The reproduction direction switching device of the present invention is capable of rotating coaxially with a drive gear wheel that is rotationally driven corresponding to the rotation direction of an electric motor and a rotation center axis of the drive gear wheel. A rotating member that is mounted on the rotating member and that performs a switching operation in the reproduction direction by its rotational displacement operation, and is rotatably mounted on the rotating member and is in a state that it is constantly meshed with the drive gear. And a switching gear that urges the rotating member to rotate in the rotational direction of the drive gear by the rotational force received from the drive gear, and a displacement operation of the rotating member that accompanies the reverse rotation of the drive gear. A switching control tooth is formed on the rotating member that meshes with the switching gear and that applies a rotational displacement force to the rotating member for switching the reproduction direction, and the switching control tooth is the switching gear. Do not mesh with the operating position that meshes It is more configuration and control member mounted to be displaceable between a work position.

(E) Operation The present invention meshes with the switching gear rotatably mounted on the rotating member that is rotationally displaced in accordance with the reverse rotation of the electric motor, and the rotating member rotates the rotating member for switching the reproduction direction. The switching control teeth provided to give a dynamic displacement force are displaced to a position where they do not mesh with the switching gear during the rewinding operation to reverse the rotation direction of the electric motor during the rewinding operation. This is to prevent the switching operation from being accidentally performed.

(F) Examples All the drawings relate to the reproduction direction switching device of the present invention, and FIG. 1 is a plan view showing a reproduction state in the first direction, FIG. 2 and FIG.
FIG. 4 is a plan view showing a state in which the switching operation from the first direction to the second direction is being performed, FIG. 4 is a plan view showing a reproducing state in the second direction, and FIG. It is a top view showing the state where it was performed. In the tape recorder according to the present invention, the rotation direction of the electric motor provided for driving the magnetic tape to run is switched according to the reproduction direction, and the rewinding operation is performed by switching the rotation direction of the electric motor. Is configured.
(1) is a drive gear that is rotatably attached to the rotation center shaft (3) provided on the fixed substrate (2) and is driven to rotate corresponding to the rotation direction of the electric motor. Is rotated counterclockwise when in the reproducing operation state, and is rotated clockwise when in the reproducing operation state in the second direction. (4) is a rotating member that is rotatably attached to the rotation center shaft (3) and has a switching projection (5), and (6) is the rotating member.
(4) is a switching gear that is rotatably mounted on the shaft (7) and is in constant mesh with the drive gear (1), and is a rotary gear that is received by the drive gear (1). The rotating member (4) is configured to urge the rotating member (4) to rotate in the rotation direction of the drive gear (1). (8) is the shaft (9) on the fixed substrate (2)
By the cooperation of (10) and the guide holes (11) and (12), the arrow (A) and
It is a sliding member that is attached so that it can be displaced in the (B) direction and is urged by the spring (13) in the arrow (B) direction. It is associated with a rewinding operation member (not shown) so that it can be slidably displaced. (14) is the shaft (1
5) It is mounted by the cooperation of (16) and guide holes (17) and (18) so that it can be displaced in the directions of arrow (C) and (D), and it is also moved in the direction of arrow (D) by spring (19). The switching member (6) is a biased control member, and when the rotating member (4) is rotationally displaced in the operating position displaced in the direction of the arrow (D).
A switching control tooth (20) that meshes with the rotary member (4) and applies a rotational displacement force to the rotary member (4) is formed. (21) is the control member
(14) A control pin provided on the sliding member.
When (8) is displaced in the direction of the arrow (A) along with the rewinding operation, it is pressed by the inclined portion (22) formed on the sliding member (8) and the control member (14) is moved to the arrow (C). This has the effect of displacing the non-operating position which is the direction, that is, the position where the switching control tooth (20) does not mesh with the switching gear (6). (23) is the fixed board (2)
The shaft (24) (25) and the guide holes (26) (27)
The switching member is mounted so as to be displaceable in the directions (A) and (B). When the switching member is in the first position shown in FIG. At the same time, it has the effect of putting the magnetic head or the like into a state of performing a reproducing operation in the second direction when in the second position shown in FIG. (28) is an over-center spring, one end of which is attached to the fixed substrate (2) and the other end of which is attached to the switching member (23), and the switching member (23) is located at the first position and the first position. The switching member (23) is biased toward the first position when it is in the first position direction from the midpoint between the two positions, and the switching member (23) is moved to the second position when it is in the second position direction from the midpoint.
It has a function of urging in the position direction. Reference numerals (29) and (30) denote first and second engagement pieces formed on the switching member (23), and the rotation is accompanied by the rotation displacement operation of the rotation member (4). It is related so as to be pressed by a switching projection (5) formed on the member (4). The present invention is configured as described above, and the operation will be described below.

The state shown in FIG. 1 shows the state of reproduction in the first direction. In this state, the drive gear (1) is in the state of being rotationally driven in the counterclockwise direction, and the rotating member (Four)
Is in a state of being urged to rotate counterclockwise by the cooperation of the drive gear (1) and the switching gear (6). Then, in such a state, the switching member (23) is in a state of being pressed and held in the first position by the urging force of the overcenter spring (28), and the rotating member (4) has the switching projection (5). ) Is in contact with the first engaging piece (29), and the rotational displacement position is restricted. From the reproduction operation state in the first direction, the second
The switching operation to the reproduction operation state in the direction is performed by reversing the rotation direction of the electric motor. When such an operation is performed, the drive mechanism of the reel shaft is switched and the drive gear (1) is rotationally driven in the clockwise direction. When the drive tooth (1) rotates in the clockwise direction, the rotating member (4) receives a rotational biasing force in the clockwise direction by the cooperation of the drive gear (1) and the switching gear (6), The moving member (4) is rotatably displaced clockwise about the rotation center shaft (3). When the rotating member (4) is rotationally displaced in the clockwise direction, the switching gear (6) rotatably mounted on the rotating member (4) has a control member (14) as shown in FIG. ) Meshes with the switching control tooth (20) formed in (1). As a result, the switching gear
The rotating member (4) is rotationally displaced in the clockwise direction by the meshing operation of (6) and the switching control tooth (20), and the state shown in FIG. 3 is obtained. When the rotating member (4) is rotationally displaced from the position shown in Fig. 2 to the position shown in Fig. 3, the switching projection (5) formed on the rotating member (4) causes the switching member (4) to move. The second engaging piece (30) formed in 23) is pressed,
The switching member (23) is displaced in the direction of the arrow (A) which is the second position. When the switching member (23) is between the first position and the intermediate position between the first position and the second position, the switching member (23) receives the biasing force toward the first position by the biasing force of the over center spring (28). However, since the rotational displacement force of the rotating member (4) generated by the engagement between the switching gear (6) and the switching control tooth (20) is large, the switching member (23) is shown in FIG. It is displaced from the position to the position shown in FIG. Then, when the rotating member (4) is displaced to the position shown in FIG. 3, the meshing between the switching gear (6) and the switching control tooth (20) is released, but at this time, the switching member (23) It is in a state of being displaced in the second position direction from an intermediate position between the first position and the second position. Therefore, the urging force of the over center spring (28) is applied to the switching member.
The state (23) is pressed in the direction of the arrow (A), which is the second position, and the switching member (23) is displaced in the direction of the arrow (A) to the state shown in FIG. When the switching member (23) is displaced to the second position shown in FIG. 4, the magnetic head or the like is switched to the state of performing the reproducing operation in the second direction, and the tape recorder is brought into the reproducing operation state in the second direction. When in the reproduction state in such a second direction, the drive gear (1) is in a state of being rotationally driven in the clockwise direction, and the rotating member (4) has the drive gear (1) and the switching gear (6). It is in a state of being urged to rotate in the clockwise direction in cooperation with. Then, in such a state, the switching member (23) is in a state of being pressed and held in the second position by the urging force of the over center spring (28),
The rotation member (4) is in a state in which the rotation displacement position is regulated by the contact of the switching projection (5) with the second engagement piece (30). As described above, the switching operation from the reproduction operation state in the first direction to the reproduction operation state in the second direction is performed, but since the switching operation from the second direction to the first direction is performed in the same manner, the description thereof will be omitted. To do.

The switching operation of the reproduction direction is performed as described above. Next, the operation when the rewinding operation is performed will be described. First
Each member is in the state shown in FIG. 1 when the reproducing operation in the direction is performed. When the rewinding operation is performed in such a state, the drive mechanism of the reel shaft is switched and the rotation direction of the electric motor is switched to configure the rewinding operation state of the tape recorder. When the rewinding operation is performed, the sliding member (8) is displaced in the direction of the arrow (A) against the urging force of the spring (13), and the inclination formed on the sliding member (8). The part (22) presses the control pin (21) provided on the control member (14). As a result, the control member (14) is in the inactive position (C) against the biasing force of the spring (19).
It is displaced in the direction to the state shown in FIG. When the reverse rotation operation of the electric motor is performed in such a state, the drive gear (1) is rotationally driven in the clockwise direction. When the drive gear (1) rotates clockwise, the rotation member (4) moves the drive gear (1).
By the cooperation of (1) and the switching gear (6), a rotational biasing force is applied in the clockwise direction, and the rotational member (4) is rotationally displaced in the clockwise direction about the rotation center shaft (3). To be Then, in this case, since the control member (14) is displaced in the direction of the arrow (C), the switching gear (6) mounted on the rotating member (4) is attached to the control member (14). Formed control teeth for switching
It never meshes with (20). As a result, the rotating member (4) does not receive a large rotational displacement force, and the rotating member (4)
The rotational displacement position is regulated in a state where the switching projection (5) formed on the upper end contacts the second engaging piece (30) formed on the switching member (23). Since the rotational displacement force of the rotating member (4) is small, the switching member (23) is not displaced in the second position direction, and the switching operation in the reproducing direction is performed even when the electric motor is rotated in the reverse direction. It will not be done. Although the rewinding operation is performed in this way, when the stop operation is performed in such a state, the control member (14) is in the operating position along with the displacement of the sliding member (8) in the direction of the arrow (B). The motor stops rotating as it is displaced in the (D) direction. When such an operation is performed, the switching control teeth (20) formed on the control member (14) and the switching gear (6) are brought into a meshed state, but when the next operation is performed, the drive gear The rotation displacement operation of the rotation member (4) is performed according to the rotation direction of (1). That is, when the reproducing operation in the first direction is performed, the rotating member (4) is rotationally displaced in the counterclockwise direction, but the switching member (23) is at the first position for performing the reproducing operation in the first direction. The switching operation of the reproduction direction is not performed. On the contrary, when the regeneration operation is performed in the second direction, the switching gear (6) and the switching control tooth (20) are in a meshed state, so that the rotating member
The displacement operation of (4) in the clockwise direction is performed, and the displacement operation of the switching member (23) to the second position is immediately performed. In this way, when the rewinding operation is performed in the state of performing the reproducing operation in the first direction, the operation is performed, but the rewinding operation is performed in the state of performing the reproducing operation in the second direction. The same operation is performed also in the case of the above, so the description thereof will be omitted.

In this embodiment, the rotation direction of the electric motor is switched during the rewinding operation, and the control member (14) is displaced to the non-operating position by the displacement operation of the sliding member (8). However, the same operation can be performed when the rewinding operation is performed. Also, the slanted portion (22) formed on the sliding member (8) and the control member (14)
Although the control member (14) is displaced to the non-operating position by the action of the control pin (21) provided on the control member (14), the control member (14) is provided with a pin on the sliding member (14). It is also possible to provide a sloping portion.

(G) Effect of the Invention The reproduction direction switching device of the present invention has an advantage that the structure is simplified because the reproduction direction switching operation is performed by utilizing the rotation direction switching operation of the electric motor. The present invention meshes with a switching gear that is rotatably attached to a rotating member that is rotationally displaced in accordance with the reverse rotation of the electric motor, and the rotating member has a rotational displacement force for switching the reproduction direction. Since the switching control tooth provided for giving the above-mentioned effect is displaced to a position which does not mesh with the switching gear during the rewinding operation, the rewinding operation is performed by switching the rotation direction of the electric motor. It is possible to prevent malfunctions that cause problems when implemented on a tape recorder.

[Brief description of drawings]

Each of the drawings relates to a reproduction direction switching device of the present invention,
FIG. 4 is a plan view showing a reproduction state in the first direction, FIGS. 2 and 3 are plan views showing a state in which a switching operation from the first direction to the second direction is being performed, and FIG. FIG. 5 is a plan view showing a reproduction state in the second direction, and FIG. 5 is a plan view showing a state where the rewinding operation is performed. Description of main drawing numbers (1)… Drive gear, (2)… Fixed substrate, (3)… Rotation center axis, (4)
... Rotating member, (6) ... Switching gear, (8) ... Sliding member, (14) ...
Control member, (20) ... switching control tooth, (21) ... control pin, (22)
… Sloping part, (23)… Switching member, (28)… Over center spring.

Claims (1)

[Claims] 1. A reproduction function in a first direction and a reproduction function in a second direction which is the opposite direction to the first direction, and the rotation direction of the electric motor is switched according to the reproduction direction. In a reciprocating tape recorder configured to perform a rewinding operation by switching the rotation direction, a drive gear that is rotationally driven corresponding to the rotation direction of the electric motor, and is coaxial with a rotation center axis of the drive gear. And a rotating member that is rotatably mounted on the rotating member and performs a switching operation in the reproduction direction by the rotational displacement operation, and is rotatably mounted on the rotating member and always meshes with the drive gear. A switching gear that is in a state and that biases the rotating member in the rotational direction of the drive gear by the rotational force received from the drive gear, and the rotating member that accompanies the reverse rotation of the drive gear. The switching gear meshes with the displacement operation, and the switching member has a switching control tooth for applying a rotational displacement force for switching the reproduction direction. The switching control tooth meshes with the switching gear. A reciprocating reciprocating device, comprising a control member mounted so as to be displaceable between a mating working position and a non-meshing non-working position, and displacing the control member to the non-working position during rewinding operation. Direction switching device for portable tape recorders.