JPH0335737B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a tape recorder, and more particularly to an operation switching device for a tape recorder configured to perform electrical operation switching using the rotational force of an electric motor.

(B) Background art There are two types of operation switching mechanisms for tape recorders: a mechanical type in which the drive mechanism is switched by pressure on an operation button, and an electronic type in which the drive mechanism is switched by the suction force of a plunger. Although this is common, recently it has become popular to switch using the rotational force of an electric motor. Further, tape recorders have been commercialized that are capable of reproducing magnetic tape not only in the first direction but also in a second direction, which is the opposite direction to the first direction.

(c) Purpose of the Invention The present invention provides an operation switching device that not only switches the operation of a tape recorder using the rotational force of an electric motor, but also switches the running direction of a magnetic tape using the same switching mechanism. This is what we are trying to provide.

(d) Embodiments of the invention The drawings all relate to the operation switching device of the present invention.
FIG. 1 is a plan view showing the stopped state, FIG. 2 is a plan view of the main parts showing a state in the middle of switching to the regeneration operation state, and FIG. 3 is a plan view of the main parts showing the regeneration operation state.
FIG. 4 is a plan view of the main part showing a state in the middle of switching the running direction of the magnetic tape, and FIG. 5 is a plan view of the main part showing a reproducing operation state in which the running direction of the magnetic tape is switched.

In the figure, reference numeral 1 denotes an operating lever that is pressed and displaced in the direction of arrow A when switching the tape recorder to the playback state or switching the running direction of the magnetic tape, and is biased in the direction of arrow B by a spring 2. At the same time, an operation button 3 is attached. Reference numeral 4 denotes a stop lever that is pressed and displaced in the direction of arrow A during a stop operation, is biased in the direction of arrow B by a spring 5, and has a stop button 6 attached thereto. Reference numerals 7 and 8 denote first and second flywheels to which the rotation of an electric motor (not shown) is transmitted via a belt, and are driven to rotate in opposite directions. Reference numerals 9 and 10 indicate first and second capstan shafts which are rotational axes of the first flywheel 7 and second flywheel 8; 11 is crimped to the first capstan shaft 9 during regeneration operation in the first direction; This is a first pinch roller that drives the magnetic tape at a constant speed in a first direction, and is rotatably attached to a first pinch roller arm 14 that is rotatably attached to a fixed substrate 12 by a shaft 13. Reference numeral 15 designates a second pinch roller which is pressed against the second capstan shaft 10 and drives the magnetic tape at a constant speed in the second direction during a reproduction operation in a second direction opposite to the first direction;
6 is rotatably attached to a second pinch roller arm 17 which is rotatably attached to the fixed base plate 12. 18 is a first capstan shaft mounted to rotate together with the second capstan shaft 10;
A drive gear 19 is rotatably mounted on the fixed base plate 12 by a shaft 20, and a second drive gear 2 is rotationally driven by the first drive gear 18.
Reference numeral 1 denotes a switching gear which meshes with the second drive gear 19 and is rotationally driven during operation switching, and a part of its teeth is provided with a toothless portion 22. The switching gear 2
1 includes a first cam 23 that performs operation switching, and a second cam 23 that performs operation switching.
A blocking piece 24 that prevents meshing with the driving gear 19 and a second cam 25 that acts to mesh with the second driving gear 19 are formed. 25 is fixed by a pin 27 provided on the fixed base plate 12, and a direction in which the switching gear 21 comes into contact with the second cam 25 formed on the switching gear 21 and engages the switching gear 21 with the second driving gear 19. It is a spring that biases the rotation. 28 is a shaft 29 attached to the fixed board 12.
This is a control member which is rotatably mounted on the switch gear 21 and biased counterclockwise by a spring 30, and engages with the blocking piece 24 formed on the switching gear 21 to prevent the switching gear 21 from moving. Said second
A blocking portion 31 is formed to prevent engagement with the driving gear 19, and an end portion 32 thereof is placed at a position where it is pressed by displacement of the operating lever 1 in the direction of arrow A. 33 is a control plate that is slidably attached to the fixed base plate 12, and 34 is a control pin formed on the control plate 33, which cooperates with the first cam 23 formed on the switching gear 21. This has the effect of displacing the control plate 33 in the direction of arrow C. Reference numeral 35 denotes a connecting pin that is connected through a hole 36 formed in the fixed substrate 12 to a sliding substrate (not shown) to which a magnetic head (not shown) is fixed. It has the effect of displacing the sliding base plate in the direction of arrow C by the displacement in the direction of arrow C, and displacing the sliding base plate to the performance position against the biasing force of a spring (not shown). 37 is rotatably attached to the fixed base plate 12 by a shaft 38, and a spring 39
When the connecting pin 35 is displaced in the direction of arrow C, it engages with the connecting pin 35 and locks the connecting pin 3.
5, that is, a lock piece 4 that holds the sliding board in the playing position.
0, and is arranged so that when the stop lever 4 is displaced in the direction of arrow A by a stop operation, it is rotated clockwise. Reference numeral 41 denotes a switching lever which is rotatably attached to the control plate 33 by a pin 42 and whose end portion 43 is biased by a spring 44, and a switching pin 45 is attached to the intermediate portion thereof. It is being The urging force of the spring 44 has the effect of applying a rotational return force to the switching lever 41 and urging the control plate 33 in the direction of arrow D. Reference numeral 46 denotes a traveling direction switching member rotatably attached to the fixed base plate 12 by a shaft 47, and the switching operation is controlled by cooperation with the switching pin 45 attached to the switching lever 41. A groove 48 and a drive pin 49 are provided. Reference numeral 50 denotes a switching sliding plate which is slidably attached to the fixed base plate 12 and is displaced in the directions of arrows A and B by a drive pin 49 provided on the running direction switching member 46. When the first pinch roller 11 and the second pinch roller 15 come into contact with the first regulating pin 51 formed on the first pinch roller arm 14 and the second regulating pin 52 formed on the second pinch roller arm 17, A first restricting portion 53 and a second restricting portion 54 are formed to restrict the crimping operation to the first capstan shaft 9 and the second capstan shaft 10.
Reference numeral 55 denotes a return spring that urges the switching sliding plate 50 in the direction of arrow A, and has the function of displacing the switching sliding plate 50 in the direction of arrow A when it is in a stopped state. Further, the second regulating portion 54 that abuts the second regulating pin 52 formed on the second pinch roller arm 17 is inclined as shown in the figure, and the second regulating pin 52 abuts the second regulating portion 54. When in this state, it has the function of resisting the biasing force of the return spring 55 to prevent the switching sliding plate 50 from being displaced in the direction of arrow A.

In such a configuration, when the sliding board is displaced to the performance position, the first pinch roller arm 14 and the second pinch roller arm 17 are released from the restriction in the non-operating position, and the displacement operation to the operating position is performed by the switching sliding plate. The first regulating portion 5 formed in 50
3 and the second regulating portion 54, and the driving force transmission mechanism to the reel shaft is controlled by the switching sliding plate 50.
The switch is configured to be switched by a sliding displacement operation. The operation switching device of the present invention is constructed as described above, and its operation will be explained next.

In the stopped state shown in FIG. 1, the control member 28 is in the state shown, and the blocking portion 31 formed on the control member 28 engages with the blocking piece 24 formed on the switching gear 21. This state prevents the switching gear 21 from meshing with the second drive gear 19 . Further, the switching sliding plate 50 is kept displaced in the direction of arrow A by the return spring 55. In this state, when the user presses the operating button 3, the operating lever 1 is displaced in the direction of arrow A against the biasing force of the spring 2. When the operating lever 1 is displaced in the direction of arrow A, its end 1a comes into contact with the end 32 of the control member 28, and the control member 28 is rotated clockwise against the biasing force of the spring 30. When the control member 28 is rotated clockwise, the blocking portion 31 formed on the control member 28 and the blocking piece 2 formed on the switching gear 21
4 is disengaged. As a result, the switching gear 21 is rotated slightly counterclockwise by the biasing force of the spring 26 and meshed with the second drive gear 19. The switching gear 21 is the second drive gear 19
When the second driving gear 19 is engaged with the second driving gear 19, the rotation of the second driving gear 19 is transmitted to the switching gear 21, and the switching gear 21 is rotated counterclockwise. The meshing operation of the switching gear 21 with the second drive gear 19 due to the displacement of the operating lever 1 in the direction of the arrow A is performed in a short time, so the user only has to press the operating button 3 for a short time. When the pressing operation is released, the operating lever 1 is returned to the non-operating position in the direction of arrow B by the biasing force of the spring 2. As a result, the control member 28 is rotated back counterclockwise by the biasing force of the spring 30. Therefore, when the switching gear 21 is driven by meshing with the second drive gear 19 and rotates once, the blocking portion 31 of the control member 28 engages with the blocking piece 24, so that the switching gear 21 rotates once. Re-meshing operation after the meshing with the second drive gear 19 by the toothless portion 22 is released is prevented. When the switching gear 21 rotates once, the first cam 23 formed on the switching gear 21 also rotates once.
As the control pin 34 rotates, it receives a displacement force in the direction of arrow C and is displaced. When the control pin 34 is pressed in the direction of arrow C, the control pin 3
4 is formed on the control plate 33 is displaced in the direction of arrow C. FIG. 2 shows a state in the middle of such switching, in which the connection pin 35 is pushed in the direction of arrow C by the displacement of the control plate 33 in the direction of arrow C, and the switching lever 41 is moved in the direction of arrow C. is forced to move to. When the connecting pin 35 is displaced in the direction of arrow C, the sliding board connected to the connecting pin 35 is displaced to the performance position, and the connecting pin 35 is locked in the displaced position by the locking member 37. become. Further, when the switching lever 41 is displaced in the direction of arrow C, the switching lever 41
A switching pin 45 formed in the running direction switching member 46 moves within a control groove 48 formed in the running direction switching member 46,
The running direction switching member 46 is rotated clockwise about the shaft 47. When the traveling direction switching member 46 is rotated clockwise, the driving pin 49 formed on the traveling direction switching member 46 causes the switching sliding plate 50 to move in the direction of arrow B against the biasing force of the return spring 55. direction. Second
When the switching gear 21 rotates from the state shown in the figure, the blocking piece 24 formed on the switching gear 21 engages with the blocking part 31 formed on the control member 28, so that the switching gear 21 rotates no further. Never. Further, when the switching gear 21 rotates to the above-mentioned position, the pressing force on the control pin 34 by the first cam 23 is removed, so that the control plate 33 is moved by the spring 44.
The biasing force causes the displacement to return in the direction of arrow D. The state shown in FIG. 3 shows the state in which such switching has been completed, and since the connecting pin 35 is locked in the displaced position by the locking member 37, the sliding board is held in the playing position. Become. Also, when the sliding board is displaced to the performance position, the first pinch roller arm 14 and the second pinch roller arm 1
The restriction at the non-operating position of 7 is released and the second pinch roller arm 17 is rotated toward the operating position by a spring (not shown).
is the second regulating portion 5 formed on the switching sliding plate 50
Since the second regulating pin 52 comes into contact with 4, displacement to the operating position is prevented. On the other hand, the first pinch roller arm 14 is connected to the first pinch roller arm 14 formed on the switching sliding plate 50.
The first pinch roller 11 is not regulated by the regulating portion 53 and is displaced to the operating position, and the first pinch roller 11 is pressed against the first capstan shaft 9 . In such a state, the second regulating pin 52 formed on the second pinch roller arm 17 is pressed against the second regulating portion 5 of the switching sliding plate 50.
4, and the switching sliding plate 50 is held in a state displaced in the direction of arrow B by the contact force against the urging force of the return spring 55. Therefore, in such a state, the first capstan shaft 9
In cooperation with the first pinch roller 11, the magnetic tape is driven at a constant speed in the first direction, and the tape recorder enters a reproduction operation state in the first direction.

As described above, the switching from the stopped state shown in FIG. 1 to the reproducing operating state shown in FIG. 3 is performed. Next, the switching operation of the running direction of the magnetic tape will be explained. This switching operation of the running direction of the magnetic tape is performed by again operating the operation button 3 that was pressed when switching to the playback operation described above. That is, when the operating button 3 is pressed while the tape recorder is in the reproducing operation state shown in FIG. 3, the operating lever 1 is displaced in the direction of arrow A, and the control member 28 is rotated clockwise. When the control member 28 is rotationally displaced clockwise, the above-described operation is performed, and as a result, the switching gear 21 rotates once, and the first cam 23
The control plate 33 is displaced in the direction of arrow C by the cooperation of the control pin 34 and the control pin 34. FIG. 4 shows a state in the middle of such switching, in which the control board 33
By the displacement in the direction of arrow C, the switching lever 41 is displaced in the direction of arrow C. The switching lever 4
1 is displaced in the direction of arrow C, the switching pin 45 formed in the switching lever 41 moves within the control groove 48 formed in the running direction switching member 46, and the running direction switching member 46 is moved around the shaft 47. and rotate it counterclockwise. When the running direction switching member 46 is rotated counterclockwise, the switching sliding plate 50 is pressed in the direction of arrow A by the drive pin 49 formed on the running direction switching member 46.
The switching sliding plate 50 is connected to the second pinch roller arm 1
3 is held in the position shown in FIG. 3 by the abutting force of the second regulating pin 52 formed at 7 on the second regulating portion 54, but due to the rotational displacement of the traveling direction switching member 46. When receiving the displacement force in the direction of arrow A by the drive pin 49, the switching sliding plate 50 overcomes the holding force by the second regulating pin 52 and is displaced in the direction of arrow A. The switching sliding plate 50 is indicated by arrow A.
When the first pinch roller arm 14 is displaced in the direction, the first pinch roller arm 14, which is in the operating position, is rotationally displaced toward the non-operating position by the first regulating portion 53, and the first pinch roller 11 is separated from the first capstan shaft 9. Further, when the switching sliding plate 50 is displaced in the direction of arrow A, the regulating operation of the second pinch roller arm 17 by the second regulating portion 54 is released, and the second pinch roller 15 is pressed against the second capstan shaft 10. Further, when the switching sliding plate 50 is displaced in the direction of arrow A, the drive mechanism of the reel shaft is switched, and the second capstan shaft 10 and the second pinch roller 1 are switched.
5, the magnetic tape is kept at a constant speed in a second direction, which is opposite to the first direction, so that the tape recorder becomes in a state of playback operation in the second direction. FIG. 5 shows the reproduction operation state in the second direction.

As described above, from the reproducing operation state in the first direction, the second direction
The switching from the second direction to the first direction can be performed in the same manner. That is, in the reproducing state shown in FIG.
1 in the direction of arrow C. The switching lever 4
1 is displaced in the direction of arrow C, the traveling direction switching member 46 is rotated clockwise about the shaft 47 by the switching pin 45. When the traveling direction switching member 46 is rotated clockwise, the switching sliding plate 50 is displaced in the direction of arrow B by the driving pin 49 formed on the traveling direction switching member 46. When the switching sliding plate 50 is displaced in the direction of arrow B, the state shown in FIG. 3 is reached, and the tape recorder enters the state of playback operation in the first direction.

As described above, by pressing the operation button 3 when the tape recorder is in the reproducing operation state, the running direction of the magnetic tape can be alternately switched.

As described above, in the present invention, the switching to the reproducing operation state and the switching operation of the reproducing direction of the magnetic tape are performed, but the stopping operation will be explained next. Such a stop operation is performed by operating the stop button 6, but first the stop operation is performed while the tape recorder is in the state shown in FIG. 3, that is, in the state of playback operation in the first direction. Let me explain the case. When the user operates the stop button 6 while the tape recorder is in the playback state shown in FIG. 3, the stop lever 4 is displaced in the direction of arrow A against the biasing force of the spring 5. When the stop lever 4 is displaced in the direction of arrow A, its end 4a comes into contact with the locking member 37, and the locking member 37 is moved by the spring 3.
9 and rotate it in a clockwise direction against the biasing force of 9. When the lock member 37 is rotated clockwise, the engagement between the lock piece 40 and the connecting pin 35 is released, and as a result, the sliding base plate, which was locked in the playing position, becomes inoperative due to the biasing force of the spring. It is slid back into position. When the sliding board returns to the non-operating position, the first pinch roller arm 14 which was in the operating position and the second pinch roller arm 17 whose position was regulated by the second regulating part 54 of the switching sliding plate 50 are moved. The reel shaft is rotated back to the non-operating position and the reel shaft drive mechanism is released. Further, when the second pinch roller arm 17 rotates back to the non-operating position, the holding operation of the switching sliding plate 50 by the second regulating pin 52 is released, so that the switching sliding plate 50 is moved by the biasing force of the return spring 55. is caused to slide in the direction of arrow A. As a result of this operation, the tape recorder enters the stopped state shown in FIG. In this way, when the tape recorder is in the playback state shown in Fig. 3 and the stop operation is performed, the operation will be performed, but next the tape recorder will be in the state shown in Fig. 5, that is, playback in the second direction. A case will be described in which a stop operation is performed while the device is in an operating state. When the stop button 6 is operated, the stop lever 4 is displaced in the direction of the arrow A, and the lock member 37 is rotated, so that the connecting pin 35 is unlocked and the sliding board slides back from the playing position to the non-operating position. . When the sliding board returns to the non-operating position, the first regulating portion 5 of the switching sliding plate 50
The first pinch roller arm 14, which was regulated by 3, and the second pinch roller arm 17, which was in the operating position, are rotated back to the non-operating position, and the reel shaft drive mechanism is released. In the state shown in FIG. 5, the switching sliding plate 50 is displaced in the direction of arrow A, so even if the sliding board returns to the non-operating position, the switching sliding plate 50 will not be displaced. As a result of this operation, the tape recorder enters the stopped state shown in FIG. In this way, even if the tape recorder is in the playback operation state in either the first direction or the second direction, if the stop operation is performed, it will be in the same stop state, so if the playback operation is performed from the stopped state, it will always play in a certain direction. A reproducing operation will be performed.

(e) Application example of the invention In this embodiment, the first drive gear 18 and the second drive gear 1 are used as the drive gears that rotationally drive the switching gear 21.
Although two gears (No. 9) are used, it can also be configured with one gear. Furthermore, the rotational displacement of the control member 28 that controls the meshing of the switching gear 21 with the second drive gear 19 is performed by displacement of the operating lever 1, but it can be performed by the suction force of the plunger. You can also do it.

(f) Effects The operation switching device of the present invention has the advantage that the configuration is simple because switching the tape recorder to the playback mode and switching the running direction of the magnetic tape are performed by the same switching mechanism. In addition, even if the running direction of the magnetic tape is in either the first or second direction, when a stop operation is performed, the magnetic tape is switched to a fixed direction and becomes stopped, so a playback operation can be performed. Therefore, the reproduction is always performed from a predetermined direction, which is extremely convenient.

[Brief explanation of drawings]

The drawings all relate to the operation switching device of the present invention; FIG. 1 is a plan view showing a stopped state, FIG. 2 is a plan view of the main parts showing a state in the middle of switching to a reproducing operating state,
Fig. 3 is a plan view of the main part showing the playback state, Fig. 4 is a plan view of the main part showing the state in the middle of switching the running direction of the magnetic tape, and Fig. 5 is a playback with the running direction of the magnetic tape switched. FIG. 3 is a plan view of main parts showing an operating state. Explanation of main drawing numbers, 1... Operating lever, 4... Stop lever, 9... First capstan shaft, 10...
...Second capstan shaft, 11...First pinch roller, 12...Fixed substrate, 14...First pinch roller arm, 15...Second pinch roller, 1
7...Second pinch roller arm, 18...First
Drive gear, 19... Second drive gear, 21... Switching gear, 22... Missing tooth portion, 23... First cam, 24
... Blocking piece, 25 ... Second cam, 28 ... Control member, 31 ... Blocking part, 33 ... Control plate, 34 ...
Control pin, 35...Connection pin, 37...Lock member, 41...Switching lever, 45...Switching pin, 4
6... Running direction switching member, 48... Control groove, 49
...Drive pin, 50...Switching sliding plate, 51...First regulation pin, 52...Second regulation pin, 53...First
Regulating portion, 54...Second regulating portion, 55...Returning spring.

Claims (1)

[Claims] 1. In a tape recorder configured to switch operations using the rotational force of an electric motor, a drive gear to which the rotation of the electric motor is transmitted, a switching gear that meshes with the operation switching operation time drive gear and rotates to a predetermined position; A switching cam that rotates together with the switching gear, a control plate that is reciprocated by the rotation of the switching cam accompanying the operation switching operation, and a magnetic tape that slides and displaces each time the control plate reciprocates. It consists of a switching sliding plate that switches the running direction of the tape recorder, and a return spring that biases the switching sliding plate in one direction.When the tape recorder is in a stopped state, the switching sliding plate is moved by the biasing force of the returning spring. An operation switching device for a tape recorder, characterized in that a plate is displaced and held at a predetermined position.