JPH01154342A - Reproducing direction switching device for two-way tape recorder - Google Patents

Abstract

PURPOSE:To prevent the reproducing direction switching operation of a tape recorder from being performed wrongly at the time of the rewinding operation by displacing a gear for controlling switching to be used for switching the reproducing direction to a position where the gear is not engaged with a switching gear at the time of the rewinding operation. CONSTITUTION:When the rewinding operation is performed, a sliding member 8 is displaced in the direction A against the energizing force of a spring 13 and the oblique section 22 of the member 8 presses a control pin 21 installed to a control member 14. As a result, the member 14 is displaced in the direction C to a nonoperable position against the energizing force of a spring 19. When a motor is driven in the opposite direction in such state, a driving gear 1 is rotationally driven clockwise. When the gear 1 is rotated clockwise, a revolving member 4 receives a clockwise rotating force and is displaced in the clockwise direction. Since control member 14 is displaced in the direction C, the switching gear 6 on the member 4 is not engaged with the gear 20 for controlling switching on the member 14. Therefore, the reproducing direction switching operation is never performed.

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 Audio devices called headphone stereos, which listen to the playback sound of magnetic tape using headphones, have become widespread, but the tape recorders built into such audio devices perform playback operations for long periods of time. In addition to the playback function in the first direction, the playback function in the second direction is opposite to the first direction.
Reciprocating tape recorders with a directional playback function are common. Such reciprocating tape recorders have a more complex structure than tape recorders that have the ability to perform playback operations in only one direction, so recent tape recorders switch the direction of rotation of the electric motor in accordance with the playback direction. This prevents the structure from becoming complicated. Furthermore, some of these tape recorders are designed not only to change the rotational direction of the electric motor in accordance with the reproduction direction, but also to perform a rewinding operation by changing the rotational direction of the electric motor. As a reciprocating tape recorder, there are devices for switching the playback direction 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 S machine 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, there is a problem of poor operability. The present invention aims to provide a reproduction direction switching device that is improved in this respect.

(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. a rotating member that is attached to the rotating member and performs a reproducing direction switching operation by its rotational displacement operation; a rotating member that is rotatably attached to the rotating member and is always in mesh with the drive gear; and a switching gear for rotationally biasing the rotating member in the rotational direction of the driving gear by the rotational force received from the driving gear; The switching gear meshes with the switching gear, and the rotating member is formed with switching control teeth that apply a rotational displacement force to the rotating member for switching the playback direction, and the switching control teeth mesh with the switching gear. The control member is mounted so as to be movable between an operating position in which it engages and a non-operating position in which it does not engage.

(*) Function The present invention meshes with a switching gear rotatably attached to a rotating member that rotates as the electric motor rotates in reverse, causing the rotating member to rotate for switching the playback direction. By displacing the switching control teeth provided to apply a displacement force to a position where they do not mesh with the switching gear during the rewinding operation, the playback direction can be switched when the rotational direction of the electric motor is reversed during the rewinding operation. This is to prevent the operation from being performed incorrectly.

(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 substrate (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 that is rotatably attached to the rotation center shaft (3) and is 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 shaft (9) < 10) and the guide holes (11) and (12). It is also a sliding member that is urged in the direction of arrow (B) by a spring (13), and when the rewinding operation is performed, it is slidably displaced in the direction of arrow <A>. (not shown). (14) is the shaft (15) (16) and guide hole (17) on the fixed board (2).
) (18) to enable displacement in the directions of arrows (C) and (D).
9) is a control member biased in the direction of arrow (D), and when the rotary member (4) is rotationally displaced when in the operating position displaced in the direction of arrow (D), the switching gear (4) is biased in the direction of arrow (D).
A switching control tooth (20) is formed which meshes with the rotating member 6) and applies a rotational displacement force to the rotating member 4). (21)
is a control bin provided on the control member (14), and when the sliding member (8) is displaced in the direction of arrow (A) due to the rewinding operation, a control bottle is formed on the sliding member (8>). The control member (14) is pressed by the inclined portion (22)
) 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 board (2) so that it can be displaced in the directions of arrows (A) and (B) by cooperation of the shaft (24> (25) and the guide hole <26> (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 (
The present invention is constructed such that zero or more are connected so as to be pressed by 5), and the operation will be described 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 the rotating member (4) is rotated clockwise about the rotation center axis <3>. When the rotating member (4) is rotationally displaced clockwise, the rotating member (4)
) is rotatably mounted on the switching gear (6) which 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 rotating member (4) is rotated from the position shown in FIG. 2 to the position shown in FIG. By pressing the second engaging piece 30) formed in the switching member 23), 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 a position intermediate between the first position and the second position and the first 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). Although there is a rotating member (
4), 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) is displaced, the switching gear (6) and the switching control tooth (2
0) is released, but at this time the switching member (23
) is in a state displaced from an intermediate position between the first position and the second position in the direction of the second position. Therefore, the over center spring (2
8) presses the switching member (23) in the direction of arrow (A), which is the second position, and the switching member (23) is displaced in the direction of arrow (A), as shown in FIG. It will be in the state shown. When the switching member (23) is moved to the second position shown in FIG. 4, the magnetic head and the like 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). In this state, the switching member (23) is pressed to the second position by the biasing force of the over-center spring (28). The rotating member (4) is in a held state, and the rotating member (4) is connected to the switching protrusion (5).
The rotational displacement position is regulated by the contact with the second engagement piece (30). As described above, the operation of switching 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 a rewinding operation is performed in such a state, the drive mechanism of the single axis is switched, and the rotational direction of the electric motor is also switched, thereby establishing a rewinding operating state of the tape recorder. Then, when the rewinding operation is performed, the sliding member (8) is displaced in the direction of arrow (A) against the biasing force of the spring (13), and the sliding member (
The inclined portion (22) formed in the control member (14)
) on the control pin (21).

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 engagement piece 30) is in contact with the engagement 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 while being displaced in the direction (D).

When such an operation is performed, the switching control tooth (20) 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 The rotational displacement operation of the rotational member (4) is performed depending on the rotational direction of (1). 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.

In the Naoki embodiment, the direction of rotation of the electric motor is switched during the rewind operation and the control member (14) is displaced to the non-operating position by the displacement operation of the sliding member (8), but during the review operation, that is, when the reproducing operation is performed, the control member (14) is displaced to the non-operating position. However, it is also possible to perform a similar operation when performing a rewinding operation.

Further, the control member (14) is displaced to the non-operating position by the action of the inclined portion (22) formed on the sliding member (8) and the control pin (21) provided on the control member (14). However, on the contrary, it is also possible to provide the sliding member (14) with a bottle and the control member (14) with a sloped portion.

(g) Effects of the Invention The playback direction switching device of the present invention has the advantage that the structure is simple because the playback direction switching operation is performed using the rotational direction switching action of the electric motor. The present invention also provides a rotational displacement force for switching the playback direction that meshes with a switching gear rotatably attached to a rotating member that is rotationally displaced as the electric motor rotates in reverse. Since the switching control teeth provided to give the motor are moved to a position where they do not mesh with the switching gear during the rewinding operation, the rewinding operation is performed by switching the direction of rotation of the electric motor. It is possible to prevent malfunctions that would be a problem if applied to a tape recorder.

[Brief explanation of the drawing]

The drawings all relate to the reproduction direction switching device of the present invention.
The figure is a plan view showing the reproducing state in the first direction, FIGS. 2 and 3 are plan views showing the state in the middle of the switching operation from the first direction to the second direction, and FIG. FIG. 5 is a plan view showing a state of reproduction in the second direction, and FIG. 5 is a plan view showing a state of rewinding. Explanation of main drawing numbers (1)...Drive gear, (2)...Fixed board, (
3>...Rotation center axis, (4)...Rotating member, (6
)...Switching gear, (8)...Sliding member, (14
)...Control member, (20)...Switching control tooth,
(21)... Control pin, (22)... Inclined part, (2
3)...Switching member, (2B)...Over center spring.

Claims (1)

[Claims] (1) It has a playback function in a first direction and a playback function in a second direction opposite to the first direction, and the rotation direction of the electric motor can be switched in accordance with the playback direction and during rewinding operation. In the reciprocating tape recorder configured, a drive gear is rotatably driven in accordance with the rotational direction of the electric motor, and the drive gear is rotatably mounted on the same axis as the rotation center axis of the drive gear, and the rotational displacement of the drive gear is rotatable. a rotary member that performs a reproducing direction switching operation by operation, and a rotary member rotatably mounted on the rotary member and always in mesh with the drive gear, and the rotational force received from the drive gear A switching gear that rotationally biases a rotating member in the rotational direction of the driving gear, and a displacement operation of the rotating member accompanying the reverse rotation of the driving gear engages the switching gear and causes the rotational movement. A switching control tooth is formed to apply a rotational displacement force for switching the playback direction to the member, and the switching control tooth moves between an operating position where the switching gear meshes with the switching gear and a non-operating position where the switching gear does not mesh with the switching gear. 1. A playback direction switching device for a reciprocating tape recorder, comprising a control member displaceably mounted, the control member being displaced to a non-operating position during a rewinding operation.