JPH0346899B2 - - Google Patents

Description

Detailed Description of the Invention (a) Field of Industrial Application 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 relates to a reproduction direction switching device.

(b) Prior Art Recently, an audio device called a head-on stereo, in which the reproduced sound of a magnetic tape is listened to using a head-on, has become popular. The tape recorder incorporated in such an audio device has not only a playback function in the first direction but also a playback function in the second direction opposite to the first direction so that playback operation can be performed for a long time. Reciprocating tape recorders are common. Devices for switching the playback direction in such reciprocating tape recorders include those that utilize manual operating force, those that utilize the suction force of a plunger, and those that utilize the rotational force of an electric motor. In a reciprocating tape recorder, if a playback operation is performed from a stopped state, there is no problem in starting the playback operation from any direction, but it is more convenient to start the playback operation in a fixed direction. Such a device is disclosed in Japanese Patent Publication No. 50-38006, and this technique utilizes the suction force of a plunger.

(C) Purpose of the Invention The present invention provides a tape recorder configured to switch the playback direction using the rotational force of an electric motor, in which when a playback operation is performed from a stopped state, playback operation in the same direction is started. It is an object of the present invention to provide such a switching device.

(D) Structure of the Invention The present invention provides 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, which is displaced to an operating position by a playback operation. and a sliding substrate which is returned to the non-operating position by a stop operation, and which is at the stop position when the tape recorder is stopped and is at the first position and the second position when playing back in the first direction and the second direction, respectively. A playback direction switching operation knob is displaced between a first position and a second position together with the playback direction switching operation knob to move the drive mechanism from the first direction to the second direction and from the second direction to the second position. a playback direction switching member that switches in one direction; a drive gear that rotates upon transmission of the rotation of the electric motor when the sliding board is in the operating position; and a trigger member that is displaced from the lock position to the trigger position when the playback direction is switched. When the trigger member is displaced to the trigger position, the switching gear engages with the drive gear and rotates by half a rotation, and also displaces the reproduction direction switching member from the first position to the second position and from the second position to the first position. The switching gear is slightly rotated in the reverse direction when the sliding board is returned to the non-operating position due to the stop operation from the reproducing operating state in the first direction.

(E) Embodiments The drawings are all related to the present invention; FIG. 1 is a plan view of the main part showing the stopped state, FIG. 2 is a plan view of the main part showing the playback state, and FIG. 3 is a side view of the main part. It is a diagram. In the figure, 1 is a regeneration operation knob, 2 is slidably attached to a fixed board (not shown), and when the regeneration operation knob 1 is pressed, an arrow
It is a sliding board that can be displaced in the direction indicated by arrow B, and is biased by a spring 3 in the direction of arrow B. 4
is a switching lever rotatably attached to a fixed base plate by a shaft 5, and is provided with an operating knob 6 for switching the reproduction direction. 7 is the arrow C on the fixed board
and a reproduction direction switching member which is attached so as to be able to be displaced in the direction of arrow D, and when the magnetic tape is in the first position displaced in the direction of arrow C, the magnetic tape is driven in the first direction, and the second position displaced in the direction of arrow D is driven. When in this position, it has the effect of driving the magnetic tape in a second direction, which is the opposite direction to the first direction. Further, an engagement piece 7a that engages with an engagement hole 4a formed in the switching lever 4 is formed at the end of the reproduction direction switching member 7, and the switching lever 4 and the reproduction direction switching member 7 are connected to each other. are related to each other so that they are integrally displaced. In such a configuration, the switching lever 4
When the playback direction switching member 7 is in the stopped state, it is at the stop position shown in FIG. 1, that is, at an intermediate position between the first position and the second position. Further, a control protrusion 8 and a control hole 9 are formed in the reproduction direction switching member 7. Reference numeral 10 denotes an engaging pin 10a which is rotatably mounted on a shaft 11 and engages with the control protrusion 8 provided on the reproduction direction switching member 7.
and a lock portion 10b, which is in the locked position when the reproduction direction switching member 7 is in the first position and the second position, and in the trigger position shown in FIG. 1 when it is in the stop position. Displaced. 12 is rotatably attached by a shaft 13, and the first and second toothless parts 1
4 and 15, which is inserted into a control hole 9 formed in the reproduction direction switching member 7, and rotates the switching gear 12 to move the reproduction direction switching member 7 to the first position or the first position. A control pin 16 is formed for displacement into two positions. 17 and 1
8 is a first plate formed on the surface of the switching gear 12 opposite to the surface on which the control pin 16 is formed.
and a second cam, and as shown in FIG.
The height from the second surface is increased.
A spring 19 contacts the first cam 17 or the second cam 18 and biases the switching gear 12 clockwise about the shaft 13. 2a is a contact piece formed on the sliding board 2, which comes into contact with the first cam 17 when the sliding board 2 is displaced from the operating position to the non-operating position, that is, in the direction of arrow B; 1
This serves to rotate the switching gear 12, on which the number 7 is formed, in a counterclockwise direction. Reference numeral 20 denotes a transmission gear which rotates by transmitting the rotation of an electric motor (not shown); 21 is rotatably attached to a shaft 22 and urged to rotate clockwise by a spring 23; A driving gear 24, which is a rotating lever and meshes with the transmission gear 20 and the switching gear 12 and transmits the rotation of the transmission gear 20 to the switching gear 12, is rotatably mounted on a shaft 25. 2b and 2c are first and second control parts formed on the sliding substrate 2;
when the shaft 25 is in the non-operating position and the operating position.
It has the effect of regulating the position of the rotating lever 21. Although the present invention is constructed as described above, the positional relationship between the control pin 16, the first cam 17, and the second cam 18 formed on the switching gear 12 is such that the regeneration direction switching member 7 is moved in the first direction. When the control pin 16 is in the first position, which is the playback position of
is in a position where the reproduction direction switching member 7 is displaced to the first position, and the first cam 17 is in a positional relationship in which it comes into contact with the contact piece 2a formed on the sliding base plate 2.

The reproduction direction switching device of the present invention is constructed as described above, and its operation will be explained next. The state shown in FIG. 1 is a stopped state, in which the sliding substrate 2 is in the non-operating position, and the switching lever 4 and the reproduction direction switching member 7 are in the stopped position. Accordingly, the drive gear 24 is located at a distance from the transmission gear 20, and the trigger member 10 is in a state where it is displaced to the trigger position by the engagement between the control protrusion 8 and the engagement pin 10a. In this state, the switching gear 12 and the driving gear 24 are in mesh with each other. When the regeneration operation knob 1 is pressed in this state, the sliding base plate 2 is displaced in the direction of arrow A against the biasing force of the spring 3 and is locked in the operating position. When the sliding board 2 is displaced to the operating position, the shaft 25 comes into contact with the second control part 2c of the sliding board 2, so the rotating lever 21 is rotated clockwise, and the driving gear 24 is moved between the switching gear 12 and the transmission gear. It meshes with the gear 20. When such a regeneration operation is performed, power is supplied to an electric motor (not shown) and starts rotating, causing the transmission gear 20 to rotate clockwise. When the transmission gear 20 rotates clockwise, the drive gear 24 is rotated counterclockwise, which causes the switching gear 12 to rotate clockwise. In this way, the switching gear 12 is rotated clockwise. When the switching gear 12 rotates to a predetermined position, that is, to a position where the first toothless portion 14 formed on the switching gear 12 corresponds to the drive gear 24, the switching gear 12 is rotated clockwise. The mesh with the drive gear 24 is cut off. When the switching gear 12 rotates from the position shown in FIG. 1 to the position shown in FIG. edge 9
a to displace the reproduction direction switching member 7 in the direction of arrow C, that is, to the first position. When the reproduction direction switching member 7 is displaced to the first position, the trigger member 10, which was in the trigger position, is rotationally displaced to the lock position, so that the lock portion 10b thereof comes into contact with the first contact portion 12a of the switching gear 12, Further rotation of the switching gear 12 is prevented. Further, the reproduction direction switching member 7
When the switch lever 4 moves to the first position, the switching lever 4 shifts to the first position, which is clockwise about the shaft 5.
It is rotationally displaced to the position. FIG. 2 shows a state in which such an operation has been performed, and the reproducing operation in the first direction will be performed in this state.

The switching from the stop state to the reproducing operating state is performed in this way, and next, the switching operation of the reproducing direction will be explained. This switching operation of the playback direction is performed by operating the playback direction switching operation knob 6. When the reproduction direction switching member 7 is in the state of regeneration operation in the first direction shown in FIG. It is displaced in the D direction. When the reproduction direction switching member 7 is displaced in the direction of arrow D and is displaced to the stop position, the trigger member 10 is rotated to the trigger position by the engagement between the control protrusion 8 and the engagement pin 10a. When the trigger member 10 is rotated to the trigger position, the rotation blocking operation of the switching gear 12 by the lock portion 10b is released. As a result, the switching gear 12 is slightly rotated clockwise by the pressing force of the spring 19 against the second cam 18,
2 meshes with the drive gear 24. As a result of this meshing operation, the switching gear 12 is rotated clockwise again. In this way, the switching gear 12
is rotated clockwise, but at a predetermined position, that is, the second toothless portion 1 formed on the switching gear 12.
5 rotates to a position corresponding to the drive gear 24, the switching gear 12 and the drive gear 24 are disengaged. When the switching gear 12 rotates in this way, the control pin 16 formed on the switching gear 12 moves around the edge 9b of the control hole 9 formed on the reproduction direction switching member 7.
, and displaces the reproduction direction switching member 7 in the direction of arrow D, that is, to the second position. When the playback direction switching member 7 is displaced to the second position, the trigger member 10 that had been displaced to the trigger position rotates back to the lock position, so that the lock portion 10b is brought into contact with the second contact portion 12b of the switching gear 12. contact and prevent further rotation of the switching gear 12. Further, when the playback direction switching member 7 is displaced to the second position in this manner, the switching lever 4 is rotated about the shaft 5 to the second position in a counterclockwise direction. As a result of this operation, the reproduction direction switching member 7 and the switching lever 4 are displaced to the second position, and as a result, the tape recorder enters a reproduction operation state in the second direction. As mentioned above, the operation of switching from the reproducing state in the first direction to the reproducing state in the second direction is performed, but since the switching operation from the second direction to the first direction is performed by a similar operation, we will explain it below. is omitted.

As described above, the apparatus of the present invention performs the switching operation to the reproducing operation state and the reproducing direction switching operation, but the stopping operation from the reproducing operation state will be explained next. First, a case will be described in which a stop operation is performed while the tape recorder is in the reproduction operation state in the first direction shown in FIG. If the stop operation button (not shown) is operated while the tape recorder is in the first direction of playback operation, the playback operation knob 1 is unlocked in the operating position and the playback direction switching member 7 is moved to the first direction. It is displaced to the stop position shown in Figure 1. When the regeneration operating knob 1 is unlocked, the sliding base plate 2 to which the operating knob 1 is attached is returned to the non-operating position in the direction of arrow B by the biasing force of the spring 3. When the sliding substrate 2 is displaced in the direction of arrow B, the shaft 25 is moved from the first shaft formed on the sliding substrate 2.
In order to come into contact with the control portion 2b, the rotary lever 21 is rotated counterclockwise against the biasing force of the spring 23. When the rotary lever 21 is rotated counterclockwise, the transmission gear 20 and the drive gear 24 are disengaged from each other. Further, when the sliding board 2 is displaced from the operating position in the direction of arrow B, the sliding board 2
The abutting piece 2a formed in the contact piece 2a contacts the first cam 17, and causes the switching gear 12, on which the first cam 17 is formed, to rotate counterclockwise. The switching gear 1
When gear 2 rotates counterclockwise, the gear 2 disengages from the transmission gear 20 due to the above-described operation and meshes with the drive gear 24, which is free to rotate, resulting in the state shown in FIG. Further, in the stopped state shown in FIG. 1, as the playback direction switching member 7 is moved to the stop position, the switching lever 4 is also moved to the stop position, and the trigger member 10 is moved to the trigger position. be.

In this way, if you perform a stop operation while the tape recorder is playing in the first direction, the operation will continue, but if you then perform the stop operation while the tape recorder is in the second direction. The operation in this case will be explained. When the tape recorder is in the reproduction operation state in the second direction, although not shown, the switching gear 12 is at a position rotated by 180 degrees with respect to FIG. It is in. If a stop operation is performed while the tape recorder is in the state of playback operation in the second direction, each of the operations described above is performed, but the contact piece 2a formed on the sliding base plate 2 comes into contact with the second cam 18. Since there is no contact, the switching gear 12 is not rotated counterclockwise. In this way, the tape recorder is returned to the stopped state, but
Since the trigger member 10 is in the trigger position in the stopped state, the switching gear 12 is rotated clockwise by the biasing force of the spring 19, and the second toothless portion 1 is rotated clockwise by the biasing force of the spring 19.
The meshing portion 12c following No. 5 is in mesh with the drive gear 24. This state is substantially the same as the stopped state shown in FIG. 1, in which the stopping operation is performed from the reproducing state in the first direction.

As explained above, tape recorders are the first
If the stop operation is performed while the reproducing operation is in either the direction or the second direction, the stopped state shown in Fig. 1 will occur, so the next time the reproducing operation is performed, the reproducing operation will always be in the first direction. It will be started.

(F) Effects of the Invention The regeneration direction switching device of the present invention uses the rotational force of an electric motor to switch the regeneration direction, so the running direction can be changed with a small operating force, making it extremely convenient. be. In addition, the regeneration direction is switched by half a rotation of the switching gear, and when the sliding board returns to the non-operating position, the switching gear is selectively rotated in the opposite direction, thereby allowing the regeneration operation from a stopped state. Since the reproducing operation is performed in the same direction when the reproducing operation is performed, the present invention has the advantage that the structure is simpler than the conventional system in which the reproducing direction is switched by one rotation.

[Brief explanation of drawings]

The drawings all relate to the present invention; FIG. 1 is a plan view of the main parts showing the stopped state, FIG. 2 is a plan view of the main parts showing the playback state, and FIG. 3 is a side view of the main parts. Explanation of main figure numbers, 1... Operation knob for reproduction, 2...
...Sliding board, 2a... Contact piece, 4... Switching lever, 6... Operation knob for switching the playback direction, 7... Playback direction switching member, 8... Control protrusion, 9... Control hole,
10...Trigger member, 12...Switching gear, 14
...First missing tooth part, 15... Second missing tooth part, 16...
Control pin, 17...first cam, 18...second cam, 20...transmission gear, 21...rotation lever, 2
4... Drive gear.

Claims (1)

[Claims] 1. In 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, the tape recorder is moved to an operating position by a playback operation, and is moved to a non-operation position by a stop operation. A sliding board that can be returned to its original position, and an operation knob for switching the playback direction that is in the stop position when the tape recorder is in a stopped state and is in the first and second positions when playing in the first and second directions, respectively. and a reproduction direction switching member that is displaced between a first position and a second position together with the reproduction direction switching operation knob to switch the drive mechanism from the first direction to the second direction and from the second direction to the first direction. a drive gear that rotates as the rotation of the electric motor is transmitted when the sliding board is in the operating position; a trigger member that is displaced from the lock position to the trigger position when the playback direction is switched; and the trigger member is displaced to the trigger position. a switching gear that meshes with the driving gear and rotates the driving gear half a rotation and displaces the reproduction direction switching member from the first position to the second position and from the second position to the first position; and a switching gear formed on the switching gear. and a cam that is in a contactable position with a contact piece formed on the sliding substrate when the regeneration operation state is in the first direction, and the stop operation is performed from the regeneration operation state in the first direction. Reproduction of a reciprocating tape recorder, characterized in that during the accompanying return operation of the sliding board to the non-operating position, the switching gear is caused to rotate slightly in the reverse direction by contact of the contact piece with the cam. Directional switching device.