JPS63166060A - Tape recorder - Google Patents

Abstract

PURPOSE:To enable the smooth tape traveling changeover control in simple constitution by shifting a gear of a gear transmission mechanism in the direction of its shaft to cut off temporarily the power transmission at the time of tape traveling changeover and allowing a smooth changeover operation under the state of intermesh. CONSTITUTION:The titled tape recorder is capable of the tape travel directional changeover control by shifting a 1st speed reduction gear 62 composing the gear transmission mechanism in the direction of the shaft to be positioned under the state of non-power transmission at the time of tape traveling changeover. Therefore, for example, even under the state of such intermesh that arises at the time of changing the regular tape travel in meshing a gear 24 of a reel shaft 22 with a 1st gear 63 over to the reverse tape travel in meshing a gear 23 of a reel shaft 21 with a 2nd gear 66, the changeover control for tape travel directions can be carried out smoothly. In this way, the tape traveling changeover control is feasible in smooth operation and in simple constitution.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to improvements in tape recorders.

(Prior Art) In recent years, tape recorders equipped with an auto-reverse mechanism that reverses the direction of tape running in a tape recorder mechanism have become popular due to demands for improved handling and operability. In such a tape recorder, the drive force from the drive source is normally transmitted to the tape recorder mechanism through a gear transmission mechanism to control the tape recorder mechanism.

FIG. 17 shows a gear transmission mechanism in such a conventional tape recorder. In the figure, 1.2 is the drive gear 3.4.
are a pair of first and second reel axes, respectively. A take-up lever 5 is rotatably disposed between the drive gears 3 and 4 on the first and second reel shafts 1.2. This winding lever 5 supports first to third gears 6 to 8, which are driven and controlled via a flywheel (not shown), and the base thereof slides in the directions of arrows A and B via a spring member 9. It is engaged with a reverse slider 10 that is movably arranged. Of these, the second gear 7 has a large diameter portion 7a.
and a small diameter portion 7b are coaxially formed with a clutch mechanism (not shown) interposed therebetween.

With the above configuration, when the tape is traveling in the forward direction, the reverse slider 10 is slid in the six directions of the arrows, and the take-up lever 5
is rotated clockwise in the figure. As a result, the second gear 7 of the take-up lever 5 meshes with the drive gear 4 of the second reel shaft 2, and the second reel shaft 2 is rotationally driven to run the tape.

Further, in the tape running state in the above-mentioned forward direction, when the tape reaches the end, for example, the reverse slider 10 is slid in the direction of arrow B by a switching mechanism (not shown). Then, the take-up lever 5 is urged to rotate counterclockwise in the figure by the spring force of the spring member 9, and the second gear 7 is disengaged from the drive gear 4 of the second reel shaft 2 and moved to the third The gear 8 is meshed with the drive gear 2 of the first reel shaft 1. As a result, the first reel shaft 1 is connected to the first to third gears 6 to 6.
8 to cause the tape to run in the reverse direction.

However, due to the configuration of the tape recorder described above, when the tape reaches the end of the tape while the tape is running in the forward direction, the second gear 7 and the subsequent gears in the gear train become locked, so that the clutch mechanism (not shown) slips. There has been a problem in that a so-called gear biting phenomenon occurs between the second reel shaft 2 and the drive gear 4 due to the torque, making smooth switching control difficult. Therefore, in the past, measures were taken to increase the spring force of the spring member 9 that biases the winding lever 5 to rotate by an amount sufficient to separate the biting of the gear, or to reduce the biting angle of the gear in advance. However, its production was extremely troublesome.

(Problems to be Solved by the Invention) This invention was made in order to prevent the above-mentioned biting phenomenon, and to realize tape running switching control that is as smooth as possible with a simple configuration. The purpose is to provide a tape recorder with

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a tape recorder having an auto-reverse mechanism for reversing the tape running direction, including a pair of reel shafts fitted with gears, and a pair of reel shafts fitted with gears. first and second gears that are meshed with the gear and meshed with each other; a gear transmission mechanism that transmits the rotational force of a drive source to either the first or second gear; a switching means for switching the tape running direction by disengaging one of the first and second gears from one of the reel shafts in conjunction with the auto-reverse mechanism; and switching means for switching the tape running in conjunction with the auto-reverse mechanism. The present invention is characterized by comprising a control means for controlling the movement of at least one gear of the gear transmission mechanism to a non-power transmission position in the axial direction.

(Function) With the above configuration, when switching tape running, the gear of the gear transmission mechanism is moved in the axial direction to temporarily interrupt power transmission, thereby realizing a smooth switching operation when the gear is in a biting state.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show a tape recorder according to an embodiment of the present invention, with FIG. 1 showing the front side and FIG. 2 showing the back side.

That is, a pair of reel shafts 21.22 are arranged approximately in the center of the main chassis 20 with a predetermined distance therebetween, and drive gears 23.24 are fitted onto the reel shafts 21.22, respectively. There is. A high-speed slider 25 is disposed at an intermediate portion of the reel shaft 21, 22 so as to be movable in the directions of arrows C and D, and a spring member 27 that is connected to a playback operation member 26 is engaged with one end of this high-speed slider 25. It will be worn. Further, a shaft 25a is implanted at one end of the high-speed slider 25, and a first switching lever 28 is rotatably supported on this shaft 25a. The first switching lever 28 has a pair of first and second engaging portions 28a at one end thereof.

28b is formed, and a protrusion 28c is formed at the other end. A recess 29a formed at one end of the second switching lever 29 is inserted into this protrusion 28G. This second switching lever 29 is connected to a shaft 2 mounted on the main chassis 20.
The shaft 29b is rotatably supported on the shaft 29b.
A switching spring 30 is engaged between the rotation fulcrum protrusion 29c formed at the other end. The other end of the switching spring 30 is engaged with an engaging portion 31a formed on a switching slider 31 (see FIG. 2).

Further, the main chassis 20 includes a reverse slider 3.
2 is disposed so as to be movable in the directions of arrows C and D, and one end of this reverse slider 32 has first and second locking parts 32.
a and 32b are the first and second switching levers 28, respectively.
The engaging portion 28a.

28b. This reverse slider 3
2 has a spring engaging part 32c formed at one end thereof, and one end of a spring member 33 which is engaged with the main chassis 20 is engaged with this spring engaging part 32c so as to apply the spring force in the direction of arrow F. be done. Further, a locking portion 32d is formed at the other end of the reverse slider 32 to correspond to a locking portion 34b of the normal rotation lever 34 rotatably supported by the main chassis 20 via a shaft 34a. As shown in FIG. 3, this normal rotation lever 34 has a spring engagement part 34C formed at one end, and this spring engagement part 34c has a main chassis 20
One end of a spring member 35 supported by is engaged. Further, a driven portion 34d is formed at the other end of the forward rotation lever 34, and this driven portion 34d is in sliding contact with one side of a reverse cam gear 36 rotatably supported by the main chassis 20. . A driving portion 36a is formed on the cam gear 36 in correspondence with the driven portion 34d of the normal rotation lever 34, and in conjunction with the rotational drive of the driving portion 36a, the driving portion 32d formed on the reverse slider 32 is first moved with the arrow The driven portion 34 of the normal rotation lever 34 is biased to move in the F direction, and the driven portion 34 of the normal rotation lever 34 is moved in the next rotation.
d to rotate and release the locking portion 32d of the reverse slider 32 by the locking portion 34b. Further, first and second notches 36b and 36c are formed at a predetermined interval on the periphery of the cam gear 36, and a cam portion 36d for forward/reverse switching is formed on one side of the cam gear 36. The cam portion 36d has first and second locking portions 36e and 36f that are spaced apart from each other by 180 degrees and are connected to the drive portion 36.
It is formed corresponding to a. An engaging portion 37a of a reversal switching lever 37 is brought into sliding contact with this cam portion 36b. The reverse switching lever 37 has its base rotatably supported by the main chassis 20, and a manual reverse operation member 38 is interlockably engaged with one end thereof. This manual reverse operation member 38 has a recording operation member 3 in its middle part.
A buffer portion 38a is formed opposite to the recording operation member 39, so that when the recording operation member 39 is in an operating state, the operation thereof is blocked. Further, a trigger slider 4o is connected to the other end of the reversal switching lever 37. This trigger slider 40 is arranged so as to be slidable in the directions of arrows E and F, and a recess 40a formed in the middle thereof is provided with an engagement formed at one end of an As○ lever 41 constituting a tape running stop mechanism. The joint portion 41a is loosely inserted. The ASO lever 41 has an intermediate portion rotatably supported by the main chassis 20, and the other end is an eccentric cam 42 formed on a second reduction gear 42 constituting a gear transmission mechanism to be described later.
It is in sliding contact with a via a friction plate 42b. This AS
As the second reduction gear 42 rotates, the O-lever 41 comes into sliding contact with the inner peripheral part of the eccentric cam 42a, and when the end of the tape is reached, the other end is urged to rotate in the outer peripheral direction, causing the trigger slider 40 to move in the direction of the arrow. It is biased to move in the E direction, thereby biasing the reversal switching lever 37 to rotate counterclockwise in the figure, thereby stopping the tape running.

Furthermore, as shown in FIG. 4, a head lever 43 is mounted on the high-speed slider 25 via arrows C and 44.
It is arranged to be movable in the D direction.

This head lever 43 has a spring engaging portion 43 at approximately the center thereof.
a is formed, and one end of a spring member 45 is engaged with this spring engagement portion 43. The other end of this spring member 45 is engaged with the regeneration operation member 25. Further, rotatable pinch rollers 46 are provided at both ends of the helad lever 43.
．． 47 are supported correspondingly to capstans 48 and 49 (see FIG. 1), and a head rotation mechanism 5o is disposed in the middle thereof. The head rotation mechanism 50 is rotationally controlled by a head drive section 32e formed in the reverse slider 32 according to the tape running direction. Furthermore, driven parts 43b and 43c are formed at both ends of the heel lever 43 and locking parts 32f and 32g formed at both ends of the reverse slider 32 (see FIG. 1).
The driven parts 43b and 43c are selectively moved in the direction of the arrow C via the spring member 27 in conjunction with the operation of the regeneration operation member 26. It comes into contact with one of the locking portions 32f and 32G and is urged to rotate clockwise and counterclockwise in the figure. As a result, the pinch rollers 46, 47 of the head lever 43 are pressed against one of the capstans 48, 49 only by the spring force of the spring member 45.

In addition, the head rotation mechanism 5 in the helad lever 43 is
An erasing head mechanism 51 is disposed at one end of the erase head 0 . This erasing head mechanism 51 has an erasing head 5 as shown in FIG.
2 is press-fitted and attached to the head holder 53, and this head holder 53 is mounted on the recording operation member 37 (see FIG. 1).

A guide portion 54 for sliding guidance is formed on the head holder 53, and this guide portion 54 is movably fitted into a guide portion 55 formed on the main chassis 20 with a spring member 73 interposed therebetween. As the recording operation member 37 slides, the head holder 53 is guided by the guide portion 55 of the main chassis 20 and moved integrally, bringing the erasing head 52 into contact with the tape.

Here, as shown in FIG. 2, a flywheel 56.57 is coaxially formed on the capstan 48.49 on the back side of the main chassis 20, and a pulley of a drive motor 58 is attached to the flywheel 56.57. The belt 60 wrapped around the belt 59 is wound around the belt 59. A driving gear 61 is integrally fitted into one of the flywheels 57 as shown in FIG. This drive gear 61 is meshed with a first gear 63 via a first reduction gear 62 and the second reduction gear 42 that constitute a gear transmission mechanism. Among these, the first reduction gear 62 is disposed to be movable in the axial direction, and a driven portion 62a is formed on one side of the first reduction gear 62, and a drive gear 64 is connected to the cam gear on the front side of the main chassis 20. 36 (see FIG. 1).

The other reduction gear 42 has a built-in clutch mechanism 65. The gear 24 of the one reel shaft 22 is meshed with the first gear 63, and the second gear 66 is engaged with the gear 24 of the one reel shaft 22.
It is aligned with the The second gear 66 meshes with the gear 23 of the other reel shaft 21 . These first and second
The gears 63 and 66 are respectively supported so as to be movable in the axial direction, and driven parts 63a and 66a are formed at their respective bases in correspondence with the driving part 31b formed on the switching slider 31.

One end of a connecting member 67 is linked to one end of the switching slider 31 . The other end of the connecting member 67 is rotatably supported by the main chassis 20, and a driven portion 67a is formed in the intermediate portion thereof. This connecting member 6
7 driven al 167a is the rewind and fast forward operation member 6
8. This corresponds to the driving portions 68a and 69a formed at 69, respectively. This rewind and fast forward operation member 68.
69 are arranged so as to be slidable in the directions of arrows C and D, respectively, and switching drive parts 68b and 69b are provided in the intermediate portions thereof, respectively.
is formed. One end of a lift lever 70 rotatably supported with respect to the main chassis 20 is engaged with the switching drive parts 68b, 6(l), and the drive part 70a is connected to the other end of the lift lever 70. A spring engaging portion 70b is formed at the other end of the lift lever 70, and a spring member is attached to the spring engaging portion 70b. One end of the spring member 71 is engaged.The other end of the spring member 71 is engaged with a lock slider 72 that locks the playback operation member 26 and the recording operation member 39 in the operation position, and is locked with the lift lever 70. The slider 72 is interlocked.
A detachment driving portion 32h formed in the reverse slider 32 corresponds to the driven portion 62a of the first reduction gear 62 (see FIG. 1). The drive gear 61 and the second reduction gear 42 are disengaged from the drive gear 61 and the second reduction gear 42 through a non-power transmission position.

In the above configuration, when a playback operator (not shown) is operated to play the tape in the forward direction, the playback operation member 26 first slides in the direction of arrow C and is locked at that operating position by the lock slider 72. Ru. At this time, as shown in FIG.
8 in the same direction. Then, the first switching lever 28 is rotated counterclockwise in the figure with its first engaging portion 28a abutting one of the first locking portions 32a of the reverse slider, and along with the rotation, the first switching lever 28 is rotated counterclockwise in the figure. The second switching lever 29 is urged to rotate clockwise in the figure.

The second switching lever 29 uses its rotational biasing force to bias the engaging portion 31a of the switching slider 31 to move in the direction F in the figure via the spring member 30. As a result, the switching slider 3
As shown in FIGS. 8 and 9, the second gear 66 is moved and biased in the axial direction by its driving portion 31b to separate from the gear 23 of one reel shaft 21, and the tape running system is moved to the tape correct position. Control the direction running state.

On the other hand, as the playback operation member 26 moves in the direction of arrow C, it uses the spring force of the spring member 27 to urge the head lever 43 to move in the direction of arrow C together with the support member 44. Then, one of the driven parts 43b of the head lever 43 comes into contact with the locking part 32f of the reverse slider 32, and is urged to rotate counterclockwise in the figure, and the pinch roller 47 is capped via the tape. It is pressed against the stun 49 only by the spring force of the spring member 45 (see FIG. 7). At the same time, the reverse slider 32 controls the head rotation mechanism 50 with its head drive unit 32e to play the tape in the forward direction, and the reel shaft 22 is connected to the drive motor 58.
, drive gear 61, first and second reduction gears 62.42,
The tape is rotated at a constant speed via the first gear 63 to play the tape in the forward direction.

In addition, in the tape forward playback state, when the end of the tape is reached, the ASO lever 41 is rotated counterclockwise in the figure and moved toward the outer periphery of the eccentric cam 42a of the second reduction gear 42. Then, the lock slider 72 is operated, and the regeneration operation member 26 is unlocked. As a result, the playback operation member 26 is returned to the original stop position together with the high-speed slider 25 by the spring force of the spring member 27, and in conjunction with this, the tape recorder mechanism is controlled to stop tape running.

Further, when the reverse operation member (not shown) is operated in the state where the end of the tape has been reached, the playback operation member 26 is held at the operation position by the lock slider 72. Then, the ASO lever 41 is moved to the trigger slider 4.
0, the reverse switching lever 37 is rotated clockwise in the figure, the cam gear 36 is brought into mesh with the drive gear 64, and the cam gear 36 is moved from the first notch 36b to the second notch. It is rotated until it reaches the notch 36G. At this time, this cam gear 3
Reference numeral 6 urges the driven portion 32e of the reverse slider 32 to move in the direction of arrow F against the spring force of the spring member 33 using the driving portion 36a. When this reverse slider 32 reaches the tape running switching completion position, its locking portion 32d
As shown in FIG.
b, and is regulated in a so-called free state with respect to the cam teeth 1136. Here, reverse slider 3
2 presses the second engaging part 28b of the first switching lever 28 with its second engaging part 32b, reverses the second switching lever 29, and moves the switching slider 31 through the spring member 30 in the direction of the arrow. Force it to move in the F direction. At the same time, the reverse slider 32
The disengagement drive portion 32fi contacts the driven portion 62a of the first reduction gear 62, causing the first reduction gear 62 to move into the eleventh position.
As shown in the figure, it is moved and biased in the axial direction to separate from the drive gear 61 and the second reduction gear 42. At this time, the switching slider 31 uses its driving portion 31b to disengage the first gear 63 from the gear 24 of the reel shaft 22, and also causes the second gear 66 to mesh with the gear 23 of the reel shaft 21, thereby shifting the tape running system to the switching slider 31. As shown in FIGS. 12 and 13, the tape is switched to a reverse running state. At this time, the first and second gears 63 and 66 are switched through a non-power transmitting position where they are spaced apart from the gears 24 and 23, respectively. At the same time, the locking portion 32f of the reverse slider 32 is connected to one driven portion 4343 of the head lever 43.
At the same time, the locking portion 32Q at the other end presses the other driven portion 43G of the head lever 43 to reverse it clockwise in the figure. As a result, the head lever 4
The pinch roller 47 of No. 3 is pressed against the capstan 49 through a tape (not shown) only by the spring force of the spring member 45. At this time, the reverse slider 32 switches and controls the head rotation mechanism 50 with its head drive unit 32e to control the tape to be played in the reverse direction, and the reel shaft 21 is connected to the drive motor 58, the drive gear 61, the first and The tape is rotated at a constant speed through the second reduction gear 62.42 and the first and second gears 63.66 to play the tape in the reverse direction.

When the stop operation member (not shown) is operated in the tape playback state, the playback operation member 26 is unlocked by the lock slider 72 and the tape recorder mechanism is controlled to switch to the tape running stop state as described above. be done. At the same time, the playback operation member 26 is operated by the high speed slider 25,
The switching slider 31 is returned to the original tape running stop position (tape forward playback position) via the first and second switching levers 28, 29 and the spring member 27.

Further, in the tape running stopped state, when a rewinding operator (not shown) is operated while the tape is not rewinding, the rewinding operation member 68 is slid in the direction of arrow C. Then, this rewinding operation member 68 moves to its switching drive section 6
8b presses the lift lever 70 in the same direction to urge it to rotate counterclockwise in the figure. As a result, lift lever 70
The driven part 62a of the first reduction gear 62 is pushed and moved in the axial direction by the detachment driving part 70a, and the driven part 62a of the first reduction gear 62 is moved to a high speed via the non-power transmission position where it is separated from the drive gear 61 and the second reduction gear 42. Switch control to rotation drive state. At the same time, the rewinding operation member 68 presses the driven portion 67a of the connecting member 67 with its driving portion 68a in the non-power transmission position controlled by the first reduction gear 62, thereby urging the rewinding operation member 68 to rotate clockwise in the figure. ,
The switching slider 31 is urged to move in the direction of arrow E. At this time, the switching slider 31 uses its driving portion 31b to disengage the first gear 63 from the gear 24 of the reel shaft 22, and also meshes the second gear 66 with the gear 23 of the reel shaft 21, thereby starting the tape running system. As shown in FIGS. 14 and 15, the tape is rewinded and the tape is rewinded. At this time, the switching operation of the first and second gears 63, 66 is performed through a non-power transmitting position where each of the first and second gears 63, 66 is spaced apart from the gears 24, 23. Further, when the switching slider 31 is kept running in the tape reverse direction,
The tape reverse direction traveling position (moved in the E direction in the figure) is maintained, and the gear switching operation by the drive section 68a is not performed.

Then, in the tape running stopped state, when a fast-forwarding operator (not shown) is operated without fast-forwarding the tape, the fast-forwarding operation member 69 is slid in the direction of arrow C. Then, the fast-forward operating member 69 presses the lift lever 70 in the same direction with its switching drive portion 69a, thereby urging the lift lever 70 to rotate counterclockwise in the figure. As a result, the lift lever 70 presses and moves the driven part 62a of the first reduction gear 62 in the axial direction with its detachment drive part 70a, and the drive gear 62 moves.
Switching control is performed to a high-speed rotation drive state via a non-power transmission position where the first and second reduction gears 42 are disengaged. at the same time,
The fast-forward operating member 69 connects the connecting member 67 with its driving portion 69a.
The driven portion 67a is pressed to urge it to rotate clockwise in the figure. At this time, the switching slider 31 controls the forward running position of the tape in the direction of the arrow F, so that the switching slider 31 controls the tape forward running position in the direction of the arrow F.
Therefore, the gear switching operation will not be performed. At this time, if the switching slider 31 is in the tape forward running position in the direction of arrow E, the drive section 69 of the fast-forward operation member 69
a, the switching slider 31 is urged to move in the direction of arrow F via the connecting member 67, and its driving portion 31b disengages the second gear 66 from the gear 23 of the reel shaft 21.
The first gear 63 is meshed with the gear 24 of the reel shaft 22,
The tape running system is controlled to fast-forward the tape as shown in FIG.

In addition, when the rewinding operation member 68 is operated in the tape reverse direction playback state, the playback operation member 26 is returned in the direction of the arrow via the high-speed slider 25, thereby causing the pinch roller 46 of the head lever 43 to The tape recorder mechanism is controlled to be in a rewind playback state by being slightly separated from the stun 48. At this time, the rewinding operation member 68 rotationally biases the lift lever 70 with its switching drive portion 68b, and switches the first reduction gear 62 to the high speed driving state via the axial non-power transmission position. , the tape running system is controlled to a rewinding running state.

When the fast-forward operation member 69 is operated in the tape forward playback state, the playback operation member 26 is returned in the direction of the arrow via the high-speed slider 25, thereby causing the pinch roller 47 of the head lever 43 to move to the capstan. 49
The tape recorder mechanism is controlled to the fast-forward playback state after a short period of time. At this time, the fast-forward operation member 69 rotates and urges the lift lever 70 with its switching drive portion 69b,
The first reduction gear 62 is switched to a high speed running state via the axial non-power transmitting position, and the tape running system is controlled to a rewinding running state.

In addition, for tape recording, the above playback operation member 2
When the recording operation member 39 is operated in the direction of arrow C along with 6, the tape recorder mechanism is controlled to be in a tape forward recording state. At the same time, the head holder 53 of the erasing head mechanism 51 housed in the head lever 43 is moved along with the recording operation member 39 in the direction of arrow C with its guide section 54 guided by the guide section 55 of the main chassis 20, and the erasing head 52 comes into contact with the tape together with the magnetic head 50a of the head rotation mechanism 50, and one-way recording of the tape is performed. Note that when the tape running direction is switched in the tape forward recording state, the reverse recording prevention section 321 formed at one end of the upper verse slider 32 prevents the tape from recording in the reverse direction. .

In this manner, when switching the tape running, the tape recorder moves the first reduction gear 62 that constitutes the gear transmission mechanism in the axial direction to control the switching of the tape running direction while controlling the non-power transmission position. By configuring it to
For example, gears generated when switching from tape forward running where the first gear 63 meshes with the gear 24 of the reel shaft 22 to tape reverse running where the second gear 66 meshes with the gear 24 of the reel shaft 21 It is possible to realize smooth switching control of the tape running direction even when the tape is being bitten. Furthermore, it is possible to reliably prevent so-called tape tension, etc., which occurs when switching control is performed from a backward tape running state to a tape forward running state. Furthermore, according to this, smooth switching control can be achieved without taking conventional measures such as increasing the spring force to counteract the biting, thereby improving productivity as much as possible. can.

In the above embodiment, a case has been described in which the first reduction gear 1i62 on the drive source side in the gear transmission mechanism is controlled to move in the axial direction. It is also possible to configure so that the movement of 42 is controlled in the axial direction. Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a tape recorder that has a simple configuration and can realize smooth tape running switching control.

[Brief explanation of the drawing]

1 and 2 are plan views showing a tape recorder according to an embodiment of the present invention, FIG. 3 is a perspective view showing a tape running direction switching mechanism shown in FIG. 1, and FIG. 4 is a plan view showing a tape recorder according to an embodiment of the invention. FIG. 5 is an exploded perspective view and sectional view showing the erasing head mechanism shown in FIG. 4; FIG. 6 is a sectional view showing the gear transmission mechanism shown in FIG. 2; 7 to 16 are operation explanatory diagrams shown to explain the operation of the tape recorder shown in FIGS. 1 and 2, respectively, and FIG. 17 is a plan view showing a gear transmission mechanism of a conventional tape recorder. . 20... Main chassis, 21.22... Reel shaft, 23.24... Gear, 25... High speed slider, 2
5a... Shaft, 26... Regeneration operation member, 27... Spring member, 28... First switching lever, 28a, 28b
...first and second engaging parts, 28G...protrusion, 2
9... Second switching lever, 29a... Recessed portion, 29b
...Shaft, 29c...Protrusion, 30...Switching spring,
31... switching slider, 31a... engaging portion, 32...
... Reverse slider, 32a, 32b... First and second locking part, 32C... Spring locking part, 33... Spring member, 32d... Locking part, 34a... Shaft , 34・
...Forward rotation lever, 34b...Lock part, 34e...
Spring engaging part, 35... Spring member, 34d... Driven part, 36... Cam gear, 36a... Drive part, 36b
, 36G...first and second notch parts, 36d...
-Cam part, 36e, 36f...first and second locking part, 37...reversal switching lever, 37a...engaging part, 3
8... Manual reverse operation member, 39... Recording operation member, 38a... Buffer part, 40... Trigger slider, 41... ASO lever, 41a... Engagement part,
42... Second reduction gear, 42a... Eccentric cam, 4
2b...Friction plate, 43...Head lever, 44...
・Supporting member, 43a...Spring engaging part, 45...Spring member, 46.47...Pinch roller, 48°49...
・Capstan, 50...head rotation mechanism, 32e・
... Head driving section, 43b, 43c... Driven section, 3
2f, 32 and l...locking portion, 51...erasing head mechanism, 52...erasing head, 53...head holder,
54.55... Guide portion, 56.57... Flywheel, 58... Drive motor, 59... Pulley, 60
... Belt, 61... Drive gear, 62... First reduction gear, 63... First gear, 62a... Driven part, 64... Drive gear, 65... clutch mechanism, 6
6... Second gear, 63a, 66a-... Driven part,
31 b... Drive unit, 67... Connection member, 67a
... Driven part, 68 ... Rewinding operation member, 69 ...
- Rapid forward operation member, 68a. 69a... Drive unit, 68b, 69b... Switching drive unit, 70... Lift lever, 70a... Drive unit, 70
b... Spring engaging portion, 71... Spring member, 72...
Lock slider, 32i1... detachment drive section, 32i...
・Reverse direction recording prevention section. Applicant's representative Patent attorney Takehiko Suzue (a) Figure 5 Figure 11 Figure 17

Claims (1)

[Claims] In a tape recorder having an auto-reverse mechanism for reversing the tape running direction, a pair of reel shafts are fitted with gears, and first and second reel shafts are meshed with the gears of the reel shaft and are meshed with each other. a gear transmission mechanism that transmits the rotational force of the drive source to either one of the first and second gears, and one of the first and second gears in conjunction with the auto-reverse mechanism. switching means for switching and controlling the tape running direction by separating the reel from one of the reel shafts;
A tape recorder comprising: control means for controlling the movement of at least one gear of the gear transmission mechanism to a non-power transmission position in the axial direction when tape running is switched in conjunction with the auto-reverse mechanism.