JPH01154341A - Reproducing direction switching device for two-way tape recorder - Google Patents

Abstract

PURPOSE:To simplify the constitution of the title device, by causing the reproducing direction switching operation of the device to be carried out by utilizing the rotating direction switching operation of a motor. CONSTITUTION:The switching operation of the reproduction operating state from the 1st direction to the 2nd direction is performed by reversing the rotating direction of a motor. When such switching operation is performed, the driving mechanism of a reel shaft is switched and, at the same time, a driving gear 1 is rotationally driven in the clockwise direction. When the gear 1 is rotated clockwise, a revolving member 4 is revolved in the clockwise direction by the cooperation of the gear 1 and a switching gear 6. Then the gear 6 is engaged with a gear 20 for controlling switching and a switching member 23 is displaced in the direction A. The engagement between the gears 6 and 20 is released when the member 4 is displaced, but, when the forcing force of an over-center spring 28 pushes the member 23 in the direction A until the member 23 reaches the 2nd position, a magnetic head, etc., are switched to states where they perform reproducing operations in the 2nd direction. The switching operation from the 2nd direction to the 1st direction is also carried out similarly.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a reciprocating tape recorder having a playback function in a first direction and a playback function in a second direction opposite to the first direction. , particularly regarding a playback direction switching device.

(b) Conventional technology An audio device called a headphone stereo, which allows you to listen to the playback sound of a magnetic tape using a headphone, has become widespread, but the tape recorder built into such an audio device does not perform playback operations for long periods of time. In addition to the playback function in the first direction so that the
Reciprocating tape recorders with a directional playback function are common. Devices for switching the playback direction in such reciprocating tape recorders include devices that utilize manual operating force and devices that utilize the suction force of a plunger. It is common to use the rotational force of an electric motor to switch the playback direction, as shown in the figure below.

(c) Problems to be solved by the invention The above-mentioned publication describes a technique in which the direction of playback of a magnetic tape is switched by the rotational force of an electric motor. The structure is complicated because the meshing operation of the switching gear, which is provided to mesh with the driving gear and switch the playback direction by its rotational driving operation, is controlled by a member that can be manually displaced. However, the present invention aims to provide a playback direction switching device that improves the above-mentioned problems.

(d) Means for Solving the Problems The regeneration direction switching device of the present invention includes a drive gear that is rotationally driven in accordance with the rotation direction of the electric motor, and is rotatable coaxially with the rotation center axis of the drive gear. The rotating member is rotatably mounted on a rotating member attached to the drive gear, and is always in mesh with the drive gear, and the rotational force received from the drive gear causes the rotating member to rotate in the rotational direction of the drive gear. a switching gear that applies a rotational force to the rotating member; and a switching gear that meshes with the switching gear and applies a rotational displacement force to the rotating member due to the displacement operation of the rotating member accompanying the reverse rotation of the driving gear. A control tooth and a rotational displacement operation of the rotating member from a first position where a regeneration operation is performed in a first direction to a second position where a regeneration operation is performed in a second direction, and from the second position to the first position. a switching member that is displaced; when the switching member is in a first position, the switching member is biased toward the first position; and the switching member is moved from the first position to a second position by a rotational displacement operation of the rotating member; When the switching member is displaced in the position direction, the switching member is moved to the second position.
urging the switching member toward the first position when the switching member is displaced from the second position toward the first position by the rotational displacement operation of the rotating member; and a biasing means.

(*) Effect: In the present invention, the switching operation of the reproduction direction is performed by utilizing the switching operation of the rotational direction of the electric motor.

(f) The embodiment drawings all relate to the playback direction switching device of the present invention, and FIG. 1 is a plan view showing the playback state in the first direction, and FIGS.
The figure is a plan view showing a state in the middle of a switching operation from the first direction to the second direction, FIG. 4 is a plan view showing a state of playback in the second direction, and FIG. FIG. In the tape recorder according to the present invention, the rotational direction of the electric motor provided to drive the magnetic tape is switched in accordance with the playback direction, and the rewinding operation is performed by switching the rotational direction of the electric motor. It is configured as follows. (
1> is the rotation center shaft (3) provided on the fixed board 2).
) is rotatably attached to the motor and is driven to rotate in accordance with the rotational direction of the electric motor, and is rotated counterclockwise when in the regeneration operation state in the first direction, and is rotated in the second direction. It is configured so that it can be rotated clockwise when in the reproducing operation state. (4) is a rotating member rotatably attached to the rotation center shaft (3) and provided with a switching protrusion (5);
) is a switching gear rotatably mounted on the rotating member (4) by a shaft (7) and always in mesh with the drive gear (1);
The rotary member (4) is biased to rotate in the rotational direction of the drive gear (1) by the rotational force received from the drive gear (1). (8) is attached to the fixed substrate (2) so that it can be displaced in the directions of arrows (A) and (B) by cooperation of the shafts (9) and (10) and the guide holes (11 and 12). It is also a sliding member that is biased in the direction of arrow (B) by a spring (13), and when the rewinding operation is performed, the rewinding operation member (Fig. (14) is connected to the fixed board 2) with the shafts (15), (16) and the guide hole (17).
(1g) so that it can be displaced in the directions of arrows (C) and (D), and the spring (19
) is a control member biased in the direction of arrow (D), and when the rotary member (4) is rotated in the operating position displaced in the direction of arrow (D), the switching gear (6
) is formed with a switching control tooth (20) that meshes with the rotating member (4) and applies a rotational displacement force to the rotating member (4). (21) is a control pin provided on the control member (14)-L, and when the sliding member (8) is displaced in the direction of arrow (A) with the rewinding operation, the sliding member ( The control member (14) is pressed by the inclined portion (22) formed in the control member (14).
) to a non-operating position in the direction of arrow (C), that is, a position where the switching control tooth (20) does not mesh with the switching gear (6). (23) is attached to the fixed substrate (2) so that it can be displaced in the directions of arrows (A) and (B) by cooperation of shafts (24), (25) and guide holes <26> and (27). It is a switching member, and the first switch shown in FIG.
When in the position, the magnetic head etc. are brought into a state of performing a reproducing operation in the first direction, and when in the second position shown in FIG. 4, the magnetic head, etc. is brought into a state of performing a reproducing action in the second direction have. (28) is an over-center spring whose one end is attached to the fixed substrate (2) and the other end is attached to the switching member (23), and the switching member (23) is in the first position and in the switching member (23). When the switching member (23) is located in the direction of the first position from the midpoint between the second position and the second position, the switching member (23)
It has the function of urging the switching member (23) toward the first position and urging the switching member (23) toward the second position when it is in the second position from the intermediate point. (29) and (30) are first and second engagement pieces formed on the switching member (23), and the rotational movement of the rotational member (4) The switching protrusion (
5). The present invention is constructed as described above, and its operation will be explained next.

The state shown in FIG. 1 shows the regeneration state in the first direction, and in this state, the drive gear 1) is in a state of being rotationally driven in the counterclockwise direction, and the rotating member (
4> is in a state where it is urged to rotate counterclockwise by the cooperation of the drive gear (1) and the switching gear (6).

In this state, the switching member (23) is pressed and held in the first position by the biasing force of the over-center spring (28), and the rotating member (4) is pressed against the switching protrusion (5). ) is in a state where the rotational displacement position is regulated by contact with the first engagement piece (29). First such
The switching operation from the regeneration operation state in the direction to the regeneration operation state in the second direction is performed by reversing the rotational 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 rotated clockwise. When the drive gear (1) rotates clockwise, the rotating member (4) rotates around the drive gear (1).
Due to the cooperation of the switching gear (6) and the switching gear (6), the rotating member (4) receives a clockwise rotation biasing force and is caused to rotate clockwise about the rotation center axis (3). When the rotating member (4) is rotationally displaced clockwise, the rotating member (4)
> The switching gear (6) rotatably mounted on the control member (14) meshes with the switching control teeth (20) formed on the control member (14) as shown in FIG. As a result, the rotating member (4) is rotated clockwise due to the meshing action between the switching gear (6) and the switching control tooth (20), resulting in the state shown in FIG. 3. When the moving member (4) is rotated from the position shown in FIG. 2 to the position shown in FIG. This results in pressing the second engagement piece (30) that is completely formed in the switching member (
23) is displaced in the direction of arrow (A), which is the second position. When the switching member (23) is between the first position and an intermediate position between the first position and the second position, the switching member (23) is in a state where it receives a biasing force in the direction of the first position by the biasing force of the over-center spring (28). The rotating member (4) generated by the meshing of the switching gear (6> and the switching control tooth (20)) is shown in FIG.
) is large, so the switching member (23) is displaced from the position shown in FIG. 2 to the position shown in FIG. 3. Then, move the rotating member (4) to the position shown in Figure 3.
) is displaced, the switching gear (6) and the switching control tooth (20
) is released, but at this time the switching member (23>
is in a state displaced toward the second position from an intermediate position between the first position and the second position. Therefore, the over center spring (28
) becomes a state in which the switching member (23) is pressed in the direction of arrow (A), which is the second position, and the switching member (
23) is displaced in the direction of arrow (A) and becomes in the state shown in FIG. When the switching member (23) is moved to the second position shown in FIG. 4, the magnetic head etc. are switched to a state in which a reproduction operation is performed in the second direction, and the tape recorder is placed in a state in which a reproduction operation is performed in the second direction. When in the regeneration state in the second direction, the drive gear (1) is in a clockwise rotationally driven state, and the rotating member (4) is connected to the drive gear (1) and the switching gear (6). It is in a state where it is urged to rotate in the clockwise direction by cooperation with. In this state, the switching member (23) is held in the second position by the biasing force of the over-center spring (28), and the rotating member (4) is pressed against the switching protrusion (5). ) is in a state where the rotational displacement position is regulated by contact with the second engaging piece (30). As described above, the switching operation from the regeneration operation state in the first direction to the regeneration 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 explanation thereof will be omitted. do.

The reproduction direction switching operation is performed as described above, but the operation when rewinding is performed will now be described. 1st
When the reproducing operation in the direction is performed, each member is in the state shown in FIG. When rewinding is performed in such a state, the drive mechanism of the reel shaft is switched, and the rotational direction of the electric motor is also switched, so that the tape recorder is in a rewinding state. When the rewinding operation is performed, the sliding member (8) is displaced in the direction of the arrow (A>i) against the biasing force of the spring (13), and the sliding member (8) is displaced in the direction of the arrow (A>i).
The inclined portion (22) formed in the control member (14)
) Press the control pin (21>) provided on the

As a result, the control member (14) is displaced in the direction of arrow (C), which is the non-operating position, against the biasing force of the spring (19), resulting in the state shown in FIG. 5. When the electric motor performs a reverse rotation operation in such a state, the drive gear (1) is rotated clockwise. When the drive gear (1) rotates clockwise, the rotating member (4) rotates the drive gear (1).
> and the switching gear (6), the rotational member (4) receives a clockwise rotational biasing force, and the rotational member (4)
It is rotated clockwise around . In this case, since the control member (14) is displaced in the direction of the arrow (C), the switching gear (6) mounted on the rotation member (4) is moved to the control member (14). It does not mesh with the formed switching control teeth (20),
As a result, the rotating member (4) is not subjected to a large rotational displacement force, and the switching protrusion (5) formed on the rotating member (4) is formed on the switching member (23). Second
The rotational displacement position is regulated in a state in which the engaging piece (30) is in contact with the engaging piece (30). Since the rotational displacement force of the rotation member (4) is small, the switching member (23) is not displaced toward the second position, and even if the electric motor is reversed, the regeneration direction switching operation is not performed. It won't happen. Although the rewinding operation is performed in this manner, when the stop operation is performed in such a state, the control member (14) moves from the operating position as the sliding member (8) moves in the direction of the arrow (B). (The electric motor stops rotating as it is displaced in the D> direction.

When such an operation is performed, the switching control tooth (20) completely formed on the control member (14) and the switching gear (6) become in mesh with each other, but when the next operation is performed, the driving gear Depending on the rotational direction (1), the rotational displacement operation of the rotational member 4) is performed. That is, when the regeneration operation in the first direction is performed, the rotating member (4) is rotated counterclockwise, but since the switching member (23) is in the first position where the regeneration operation is performed in the first direction. No switching operation of the reproduction direction is performed. On the other hand, when the regeneration operation is performed in the second direction, the switching gear (6) and the switching control teeth <20) are in mesh with each other, so that the rotating member (4) is displaced clockwise. is carried out, and the second switching member (23) mentioned above is
A displacement action to the position will occur immediately. In this way, if the rewind operation is performed while the playback operation is in the first direction, the operation is performed, but the second
A similar operation is performed when a rewind operation is performed while a playback operation is being performed in this direction, so a description thereof will be omitted.

(G) Effects of the Invention The regeneration direction switching device of the present invention uses the switching operation of the rotational direction of the electric motor to perform the regeneration direction switching operation, so that the meshing operation between the switching gear and the drive gear is triggered by a single trigger member. The present invention has the advantage that the configuration is simpler than the conventional technology which controls the system using the above methods, and it has a very large effect when implemented in an ultra-small tape recorder.

[Brief explanation of the drawing]

The drawings all relate to the playback direction switching device of the present invention, and FIG. 1 is a plan view showing the playback state in the first direction, and FIGS.
The figure is a plan view showing a state in the middle of a switching operation from the first direction to the second direction, FIG. 4 is a plan view showing a state of playback in the second direction, and FIG. FIG. Explanation of main drawing numbers (1)...Drive gear, (3)...Rotation center axis,
(4)...Rotating member, (6)...Switching gear, (
8)...Sliding member, (14)...Control member, (2
0)...Switching control tooth, (23)...Switching member,
(28)...Over center spring.

Claims (1)

[Claims] (1) A reciprocating type having a regeneration function in a first direction and a regeneration function in a second direction opposite to the first direction, and configured so that the rotation direction of the electric motor can be switched in accordance with the regeneration direction. In the tape recorder, a drive gear rotationally driven in accordance with the rotational direction of the electric motor, a rotating member rotatably mounted coaxially with the rotation center axis of the drive gear, and a rotating member on the rotating member. a switching gear that is rotatably attached to the drive gear, is always in mesh with the drive gear, and biases the rotating member to rotate in the rotational direction of the drive gear by the rotational force received from the drive gear; and a switching control tooth that engages the switching gear and applies a rotational displacement force to the rotational member due to the displacement operation of the rotational member accompanying the reverse rotation of the drive gear; a switching member that is displaced by rotational displacement from a first position where a regeneration operation is performed in a first direction to a second position where a regeneration operation is performed in a second direction, and from the second position to the first position;
When the switching member is in the first position, the switching member is biased toward the first position, and the switching member is displaced from the first position toward the second position by the rotational displacement operation of the rotating member. When the switching member is biased toward the second position, and when the switching member is displaced from the second position toward the first position by the rotational displacement operation of the rotating member, the switching member is moved toward the first position. A playback direction switching device for a reciprocating tape recorder, comprising a biasing means for biasing displacement in a position direction.