JPS644260B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder, and more particularly to an operation switching device for a tape recorder configured to switch operations using the rotational force of an electric motor.

The operation switching device of a tape recorder is generally 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. However, recently, devices in which the drive mechanism is switched by the rotational force of an electric motor have become popular. The present invention relates to a tape recorder configured to switch operations using the rotational force of such an electric motor, particularly a tape recorder equipped with a so-called cue or review function in which a playback function is added and fast-forwarding or rewinding is performed while playing. The present invention is intended to provide an operation switching device, and will be described in detail below with reference to the drawings.

The drawings all relate to the operation switching device of the present invention,
FIG. 1 is a plan view showing a stop state, FIG. 2 a playback state, and FIG. 3 a queue state. In the figure, 1
A regeneration operation lever is slidably attached to a fixed base plate 4 by pins 2 and 3, and is biased by a spring 5 in the direction of arrow A, which is the non-operating position. Reference numeral 6 denotes a fast-forward operation lever that is pressed during fast-forward and cue operations, and is slidably attached to the fixed base plate 4 by pins 7 and 8, and is in the non-operating position by a spring 9 as shown by arrow A. biased in the direction. Reference numeral 10 denotes a rewind operation lever that is pressed during rewind and review operations, and is slidably attached to the fixed base plate 4 by pins 11 and 12, and is supported by a spring 13.
is biased in the direction of arrow A, which is the non-operating position. When the playback operation lever 1, the fast-forward operation lever 6, and the rewind operation lever 10 are operated individually, they are locked in the operating position by a lock mechanism (not shown); When the fast forward operating lever 6 and rewind operating lever 10 are operated to perform
is configured so that it cannot be locked in an operating position. Such locking mechanisms are generally well known and are omitted from this description. 14 is a shaft 15 attached to the fixed substrate 4.
The belt 16 is a pulley which is rotatably mounted by a belt 16 and to which the rotation of an electric motor (not shown) is transmitted by a belt 16, and a pair of drive gears are formed in the center of the pulley. Reference numeral 18 denotes a switching gear which meshes with the drive gear 17 and is rotationally driven to switch the operation of the tape recorder when switching operations, and is rotatably attached to the fixed base plate 4 by a shaft 19 and has some of its teeth. A first toothless portion 20 and a second toothless portion 21 are formed in the. The switching gear 18 is provided with a cam 22 for switching the operation, and a first blocking piece 23 and a second blocking piece 24 for preventing meshing with the driving gear 17. 25
is fixed by a pin 26 provided on the fixed base plate 4 and comes into contact with a cam 22 formed on the switching gear 18, and rotates in the direction of meshing the switching gear 18 with the driving gear 17. It is a spring that strengthens the body. 27 is the pin 28 on the fixed board 4
and 29, and is a control member that is slidably mounted and is biased in the direction of arrow B by a spring 30. Reference numeral 31 denotes a blocking portion provided on the control member 27, which engages with the first blocking piece 23 and the second blocking piece 24 formed on the switching gear 18 depending on the displacement position of the control member 27. Switching gear 1
8 has the function of preventing meshing with the drive gear 17. 32 and 33 are the control members 27
first and second engaging portions formed in
When the control member 27 is in a position where it is displaced in the direction of arrow C, the press pins 34 and 35 provided on the fast-forward operation lever 6 and the rewind operation lever 10 are brought into contact by displacement in the direction of arrow D. It has the effect of pressing and displacing the control member 27 in the direction of arrow B. Reference numeral 36 denotes a trigger member which is rotatably attached to the fixed base plate 4 by a shaft 37 and is rotationally displaced counterclockwise by displacement of the regeneration operating lever 1 in the direction of arrow D; The control member 2 is controlled by the spring 38 having a larger elastic force.
It is connected to 7. Further, 39 is the control member 2
7, and has the function of regulating the rotational displacement position of the trigger member 36. Reference numeral 40 is slidably attached to the fixed substrate 4 and is attached to the magnetic head 4.
1 is a fixed sliding base plate, which is biased by a spring 42 in the direction of arrow A, which is the stop position. Reference numeral 43 denotes a control pin connected to the sliding board 40 through a long hole (not shown) formed in the fixed board 4, and the control pin 43 cooperates with the cam 22 formed in the switching gear 18 to It has the function of displacing the sliding substrate 40 in the direction of arrow D, which is the reproduction position. Numeral 44 is an engagement pin connected to the sliding substrate 40 through a long hole 45 formed in the fixed substrate 4, and 46 is rotatably attached to the fixed substrate 4 by a shaft 47 and a spring 48. This is a locking member that is biased counterclockwise by the lock member, and has the function of holding the sliding board 40 in the queue or review position by engaging with the engaging pin 44. Reference numeral 49 denotes a stopper pin for regulating the rotational displacement position of the lock member 46. In such a configuration, the locking member 46 is associated with a stop operation lever (not shown) so as to be rotated clockwise during a stop 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 reproduction operation lever 1, the fast-forward operation lever 6, and the rewind operation lever 10 are all in non-operating positions. Further, the blocking portion 31 formed on the control member 27 is in a state of being engaged with the first blocking piece 23 formed on the switching gear 18, and is in a state of preventing the switching gear 18 from meshing with the driving gear 17. be. In this state, the first toothless portion 20 formed on the switching gear 18 is in a position facing the drive gear 17. In such a stopped state, when the user performs a regeneration operation, the regeneration operation lever 1 is displaced in the direction of arrow D against the biasing force of the spring 5, and is moved to the operating position shown in FIG. 2 by the lock member. Lock held. When the playback operation lever 1 is displaced in the direction of arrow D, its tip 1a comes into contact with the trigger member 36, and the trigger member 36 is rotated counterclockwise about the shaft 37. When the trigger member 36 is rotated counterclockwise, a displacement force in the direction of arrow C acts on the control member 27 via the spring 38.
The control member 27 is displaced in the direction of arrow C against the biasing force of the spring 30. When the control member 27 is displaced in the direction of arrow C, the engagement between the blocking portion 31 formed on the control member 27 and the first blocking piece 23 formed on the switching gear 18 is released.
As a result, the switching gear 18 is slightly rotated counterclockwise by the biasing force of the spring 25, and the driving gear 17 is rotated slightly counterclockwise.
At the same time, power is supplied to the electric motor and it starts rotating by switching the switch by displacing the regeneration operation lever 1. When the switching gear 18 meshes with the driving gear 17, the rotation of the driving gear 17 is transmitted to the switching gear 18, and the switching gear 18 is rotationally driven in a counterclockwise direction. The switching gear 18 is rotationally driven by meshing with the driving gear 17, and the second
When the toothless portion 21 reaches a position facing the drive gear 17, the second blocking piece 24 formed on the switching gear 18 moves to the blocking portion 31 formed on the control member 27.
, and further rotation of the switching gear 18 is prevented. When the regeneration operation lever 1 is displaced in the direction of the arrow D in this manner, the switching gear 18 is moved toward the first toothless portion 20 as the control member 27 is displaced in the direction of the arrow C.
2nd missing tooth portion 2 from the position facing the drive gear 17
1 rotate counterclockwise until they are facing each other. When the switching gear 18 rotates in this way, the cam 22 formed on the switching gear 18 also rotates.
As the cam 22 rotates, a pressing force is applied to the control pin 43 in the direction of arrow D from the cam 22. As a result, the sliding board 40 connected to the control pin 43 is
direction and held at the playback position shown in FIG. In such a state, the magnetic head 41 comes into contact with the magnetic tape and the drive mechanism enters the playback operating state, thereby establishing the playback operating state of the tape recorder. As the sliding board 40 is displaced to the playback position, the engagement pin 44 is displaced in the direction of arrow D, but the engagement pin 44 abuts against the inclined portion 46a formed on the lock member 46 and locks the lock member 46. Since the member 46 is rotationally displaced clockwise, arrow D
Displacement movements in this direction are not prevented in any way.
Further, when the sliding base plate 40 is in the playback position shown in FIG. 2, the engagement pin 44 is at a position slightly distant from the lock member 6 in the direction of arrow D.

The switching to the reproduction operation state is performed as described above, and next, the cue operation which is a fast forward operation from the reproduction operation state will be explained. When the tape recorder is in the playback operation state shown in FIG. 2 and a fast forward operation is performed, the fast forward operation lever 6 is displaced in the direction of arrow D against the biasing force of the spring 9, but the operation of the playback operation lever 1 is The lock in position is never released, and the fast-forward operating lever 6 is never locked in the operating position. When the fast-forward operating lever 6 is displaced in the direction of arrow D, the pressing pin 34 provided on the operating lever 6
is formed on the control member 27.
The control member 27 is moved in the direction of arrow B against the biasing force of the spring 38. When the control member 27 is displaced in the direction of arrow B, the blocking portion 31 formed on the control member 27
and a second blocking piece 24 formed on the switching gear 18.
The switching gear 18 meshes with the drive gear 17 again. The switching gear 18 is the drive gear 17
When the driving gear 17 is engaged with the switching gear 18, the rotation of the driving gear 17 is caused by the switching gear 18
, and the switching gear 18 is rotationally driven in the counterclockwise direction. The switching gear 18 is the drive gear 17
The first toothless portion 2 is driven to rotate by meshing with the
0 comes to a position facing the drive gear 17, the first blocking piece 23 formed on the switching gear 18 engages with the blocking part 31 formed on the control member 27, and the switching gear 18 is stopped further. rotation is prevented. When the fast-forward operation lever 6 is displaced in the direction of the arrow D in this manner, the switching gear 18 is moved from the position where the second toothless portion 21 faces the drive gear 17 to the first toothless portion as the control member 27 is displaced in the direction of the arrow B. Rotate counterclockwise to a position where the teeth 20 face each other. When the switching gear 18 rotates in this manner, the switching gear 18
The cam 22 formed in the cam 22 also rotates. The cam 2
2 rotates, the control pin 43 follows the cam 22 and is displaced in the direction of arrow A due to the biasing force of the spring 42, and the sliding base plate 40, which was at the reproduction position, is displaced toward the stop position. When the sliding board 40 is displaced in the direction of arrow A, the engagement pin 44 is also displaced in the direction of arrow A. At this time, the locking member 46
The lock portion 46b formed on the engagement pin 4
4 to prevent displacement of the engagement pin 44 in the direction of arrow A. Therefore, the sliding substrate 40 is held at a position slightly retreated toward the stop position from the cue position shown in FIG. 3, that is, the reproduction position. Further, by displacing the fast-forward operation lever 6 to the operating position, the magnetic tape drive mechanism is brought into a fast-forward state, thereby configuring the queue operation of the tape recorder.

In such a cue operation state, when the pressing force on the fast-forward operating lever 6 is cut off, the fast-forward operating lever 6 is not locked in the operating position, so the fast-forward operating lever 6 is moved by the biasing force of the spring 9. The displacement is returned in the direction of arrow A, which is the non-operating position. When the fast-forward operating lever 6 is displaced in the direction of arrow A, the pressing pin 34 provided on the operating lever 6 is disengaged from the first engaging portion 32 formed on the control member 27. As a result, control member 2
7 is displaced in the direction of arrow C by the biasing force of the spring 38, resulting in the state shown in FIG. That is, the displacement of the control member 27 in the direction of arrow C is the same as when the regeneration operation lever 1 is operated from the stopped state, and the above-mentioned operation is performed and the sliding substrate 4
0 is displaced from the queue position to the playback position and the playback operating state is reestablished.

The reproduction operation and cue operation are performed as described above, but next, a case will be described in which a stop operation is performed depending on the reproduction state. In the regeneration state shown in FIG. 2, when a stop operation is performed, the regeneration operation lever 1 is unlocked in its operating position and the lock member 46 is rotated clockwise.
When the regeneration operation lever 1 is unlocked, the regeneration operation lever 1 is displaced in the direction of arrow A by the biasing force of the spring 5, and the trigger member 36 is rotated clockwise in conjunction with the displacement. Dynamic displacement. When the trigger member 36 is rotated clockwise, the control member 27 is displaced in the direction of arrow B by the biasing force of the spring 30.
When the control member 27 is displaced in the direction of the arrow B, the same operation as that during the cue operation described above is performed, and the sliding base plate 40 is displaced in the direction of the arrow A by the biasing force of the spring 42. As the sliding board 40 is displaced in the direction of arrow A, the engagement pin 44 is also displaced; however, in this case, the locking member 46 is rotated clockwise by the stop operation lever. , the sliding board 40 is not held at the queue position described above, but slides to the stop position shown in FIG. 1, and the tape recorder comes to a stop state.

As described above, the cue operation is performed, but if the rewind operation lever 10 is operated during the playback operation state, the press pin 35 provided on the operation lever 10 will be pushed into the second engaging portion 33 of the control member 27. The control member 27 is moved in the direction of arrow B by contacting the inclined portion 33a of the control member 27. As a result, the same operation as in the queue operation is performed to constitute the review operation of the tape recorder. Furthermore, if the fast-forward operation lever 6 or rewind operation lever 10 is operated when the tape recorder is in a stopped state, each operation lever 6, 10 is locked in the operating position and the tape recorder operates fast-forward or rewind. is configured.

As explained above, the operation switching device of the present invention provides one switching gear with first and second toothless parts,
Since the playback operation and the queue or review operation are switched by rotating from one toothless part to the other toothless part, the configuration is simple, and the tape recorder switches the operation using the rotational force of the electric motor. It is ideal as an operation switching device.

[Brief explanation of drawings]

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 playback state, and FIG. 3 is a plan view showing the queue state. Explanation of main figure numbers, 1... Reproduction operation lever, 4
...Fixed board, 6...Fast-forward operation lever, 10
... Rewind operation lever, 17 ... Drive gear, 1
8... Switching gear, 20... First missing tooth portion, 21...
2nd missing tooth portion, 22... cam, 23... first blocking piece, 24... second blocking piece, 27... control member, 3
1... Blocking part, 36... Trigger member, 40...
...Sliding board, 43...Control pin, 44...Engagement pin, 46...Lock member.

Claims (1)

[Claims] 1. In a tape recorder that is configured to switch operations using the rotational force of an electric motor and has a cue or review function in addition to a playback function, a drive gear to which the rotation of the electric motor is transmitted, and a drive gear that is connected to the drive gear when switching operations. a switching gear that meshes with the switching gear and performs operation switching through its rotation, and is formed with first and second toothless parts; A sliding base plate to which a control member and a magnetic head for controlling the meshing operation are attached, and which is slidably displaced to a stop position, a reproduction position, and a cue or review position, and an engaging pin formed on the sliding base plate. and a locking member that holds the sliding base plate in the queue or review position through engagement, and by displacement of the control member, the driving gear and the switching gear are meshed with each other, thereby causing the first toothless portion of the switching gear to mesh with the switching gear. Rotational displacement to the second toothless portion displaces the sliding substrate to the reproduction position, and rotational displacement from the second toothless portion to the first toothless portion causes the sliding substrate to be moved from the reproduction position to the queue or review position. 1. An operation switching device for a tape recorder, characterized in that the tape recorder is moved to a certain position.