JPS63166058A - Tape recorder - Google Patents

Abstract

PURPOSE:To simplify a constitution and to minimize its size and also to improve handling performance by controlling the movement of 1st and 2nd gears for driving respectively each of a pair of reel shafts by means of a changeover control member in the direction of either of the shafts, meshing one of the gears as corresponding to the required tape traveling direction with a gear of the reel shaft concerned and controlling also the disengagement of the other gear from a gear of the other shaft. CONSTITUTION:The 1st gear 63 is intermeshed with the gear 24 of the one reel shaft 22 and also with the 2nd gear 66 as well, while the 2nd gear 66 is meshed with the gear 23 of the other reel shaft 21. These 1st and 2nd gears 63 and 66 are supported freely movably in the direction of the shafts respectively, and their bases are formed of their respective driven parts 63a and 66a in conformity with a drive part 31b formed to a changeover slide 31. Consequently, the changeover control of tape traveling directions for the titled tape recorder is performed by controlling the movement of the 1st and 2nd gears 63 and 66 for driving their respective reel shafts by means of the changeover slider 31 in the direction of either of the shafts concerned. In this way, it is possible to simplify constitutional parts and to minimize constitutional dimensions as well.

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 for reversing the direction of tape running in the tape recorder I structure 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 and 2 are drive gears 3 and 4.
A pair of first and second reel shafts are fitted into each other, and are rotatably arranged in the main chassis 5. be. Of these, a winding lever 6 is rotatably disposed on the main chassis 5 corresponding to the drive gear 3 of the first reel shaft 1.
A take-up gear 8 that is selectively meshed with the drive gear 7 is supported at one end of the take-up lever 6 . The winding lever 6 has a driven portion 6a formed at one end thereof, and a driving portion 9a formed on the regeneration operation member 9 is opposed to the driven portion 6a. The drive gear 7 is formed coaxially with a flywheel (not shown), and the rotational force of a drive motor (not shown) is transmitted via a belt.

Further, a high-speed lever 10 is slidably disposed on the main chassis 5 at an intermediate portion between the first and second reel shafts 1.2, and the high-speed lever 10 has first to third gears 11. - 13 are attached correspondingly to the drive gear 7 and the gears 3 and 4 of the first and second reel shafts 1 and 2. First and second driven parts 10a and 10b are formed at one end of this high-speed lever 10, and rewind and fast forward operation members 14. Drive portions 14a and 15 formed at one end of each of the drive portions 14a and 15
a is opposed.

With the above configuration, when a playback operator (not shown) is operated, the playback operation member 9 slides in the direction of the arrow and presses the driven portion 6a of the take-up lever 6 with its driving portion 9a. Then, the winding lever 6 is rotated clockwise in the figure.
The gear 8 is connected to the drive gear 7 and the gear 3 of the first reel shaft 1.
The first reel shaft 1 is rotated at a constant speed to cause the tape to travel at a constant speed.

Further, when a rewind operator (not shown) is operated, the rewind operation member 14 is slid in the direction of the arrow, and the drive portion 14 is slid in the direction of the arrow.
Press the driven portion 10a of the high-speed lever 10 with a. Then, this high speed lever 10 is slid and its first gear 1
1 into mesh with the drive tooth 17, and the third gear 1
3 is meshed with the gear 4 of the second reel shaft 2, and the second reel shaft 2 is driven to rotate at high speed to rewind the tape.

When a fast-forward operation element (not shown) is operated, the fast-forward operation member 15 is slid in the direction of the arrow, and its drive section 1
5a presses the driven portion 10b of the high-speed lever 10. Then, this high speed lever 10 slides and its first gear 1
1 into mesh with the drive gear 7, and the second gear 1
2 is meshed with the gear 3 of the first reel shaft 1, and the first reel shaft 1 is driven to rotate at high speed to perform tape fast forward running.

However, in the above tape recorder, the constant speed tape running system and the high speed running system are independent, so
Since a large number of component parts are required, the tape running system becomes large in size, and its assembly becomes troublesome. In addition, according to this, the control including the switching timing between the tape constant speed running system and the tape high speed running system is extremely complicated, so malfunctions may occur during switching IQ control, resulting in so-called tape slack, tape breakage, etc. There was a risk of causing a problem.

(Problems to be Solved by the Invention) This invention was made in view of the above-mentioned request for simplification of the tape running system, and it has a simple structure, can be downsized, and has improved handling workability. It is an object of the present invention to provide a tape recorder capable of realizing improvements.

[Structure of the Invention (Means for Solving Problems)] The present invention provides a tape recorder having an auto-reverse mechanism for reversing the tape running direction, which includes a pair of reel shafts fitted with gears, and a pair of reel shafts fitted with gears. The first and second gears are meshed with the gear and are meshed with each other, and the rotational force of the drive source is transmitted at high speed and constant speed to either one of the first and second gears. a gear transmission mechanism; and a switching control member that is interlocked with the auto-reverse mechanism and controls the movement of the first and second gears in the axial direction so that one gear is MM of the reel shaft to switch the tape running direction. It is characterized by the following:

(Function) With the above configuration, the first and second gears that respectively drive the pair of reel shafts are controlled to move in the axial direction by the switching control member, and one gear is engaged with the gear of the reel shaft according to the tape running direction. and the other is controlled to separate from the gear on the reel shaft.

(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. Also, ^
A shaft 25a is implanted at one end of the speed slider 25, and a first switching lever 28 is rotatably supported on the 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 the projection 28c. 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 32G 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 its 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 this cam tooth 1136 in correspondence with the driven portion 34d of the normal rotation lever 34, and when it is rotated, the driving portion 32d formed on the reverse slider 32 is moved as shown by the arrow. The driven portion 3 of the normal rotation lever 34 is biased to move in the F direction, and the driven portion 3 of the normal rotation lever 34 is moved in the next rotation.
4d 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 3.
6a. 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 buffer portion 38a formed at its intermediate portion to face the recording operation member 39, so that when the recording operation member 39 is in an operating state, its operation is prevented. In addition, the reversal switching lever 37
A trigger slider 40 is connected to the other end. This trigger slider 40 is disposed so as to be slidable in the directions of arrows E and F, and a recess 40a formed in the middle thereof has an engagement formed at one end of an ASO lever 41 constituting a tape running stop mechanism. The portion 41a is loosely inserted. This ASO
The lever 41 has an intermediate portion rotatably supported by the main chassis 2o, and the other end is an eccentric cam 4 formed on a second reduction gear 42 constituting a gear transmission mechanism to be described later.
I against 2a! They are brought into sliding contact via a J friction plate 421).

This ASO lever 41 is brought into sliding contact with the inner peripheral part of the eccentric cam 42a as the second deceleration wheel 42 rotates, and when the end of the tape is reached, the other end is urged to rotate in the outer peripheral direction and the trigger slider is rotated. 40 is biased to move in the direction of arrow E, and as a result, the reversal switching lever 37 is biased to rotate counterclockwise in the figure, thereby stopping tape running.

Furthermore, as shown in FIG. 4, a head lever 43 is mounted on the high-speed slider 25 via an arrow C1.
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, 49 (see FIG. 1), and a head rotation mechanism 50 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 in correspondence with the locking parts 32f and 32Q (see the first factor) formed at both ends of the reverse slider 32. is moved in the direction of arrow C via the spring member 27 in conjunction with the operation of the regeneration operation member 26, and the driven parts 43b and 43c selectively engage the locking parts 32f and 32g of the reverse slider 32. It comes into contact with one side and is biased 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 to one of the flywheels 57 as shown in the sixth factor. 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).

On the other hand, the second 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
The driven portion 67a of No. 7 is a rewind and fast forward operation member 68.
The drive portions 6ea and 69a are respectively formed in the drive portions 69 and 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.
Switching drive portions 68b and 69b are formed in the intermediate portions, respectively. These switching drive parts 68b and 69b are connected to a lift lever 7 rotatably supported with respect to the main chassis 20.
One end of the lift lever 70 is engaged with the other end of the lift lever 70, and a drive portion 70a is formed in correspondence with the driven portion 62a of the first reduction gear 62. A spring engaging portion 70b is formed at the other end of the lift lever 70.
One end of a spring member 71 is engaged with this spring engagement portion 70b. 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 causes the lift lever 70 and the lock slider 72 to interlock. Further, 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), and the movement of the reverse slider 32 in the directions of arrows E and F is supported. Accordingly, the drive gear 61 is urged to move in the axial direction.
and a non-power transmission position where it is disengaged from the second reduction gear 42.

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. Illm to 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 tooth ll61, first and second reduction gear 62.42
, and 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 teeth 136 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 36c. 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 relative to the cam gear 36. Here, the reverse slider 32
presses the second engaging portion 28b of the first switching lever 28 with its second engaging portion 321), reverses the two second switching levers, and moves the switching slider 31 via the spring member 30. Force to move in the direction of arrow F. At the same time, the reverse slider 32
The disengagement driving portion 32h contacts the driven portion 62a of the first reduction gear 62 and urges the first reduction gear 62 to move in the axial direction as shown in FIG. It is removed from 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
The gears 63, 66 each perform their switching operation via a non-power transmitting position in which they disengage from the gears 24, 23. At the same time, the locking portion 32f of the reverse slider 32 is connected to one driven portion 434 of the head lever 43.
3b, and the other driven portion 43c of the head lever 43 is pressed by the locking portion 32Q at the other end to reverse it clockwise in the figure. As a result, the pinch roller 47 of the head lever 43 is pressed against the capstan 49 via 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 the reverse playback state, 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 two reduction teeth 1162, 42 and 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. Ru. 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 and 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 driven 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, the lift lever 70 presses and moves the driven portion 62a of the first reduction gear 62 in the axial direction with its detachment drive portion 70a, and the non-power transmission detaches from the drive gear 61 and the second reduction gear 42. Controls switching to high-speed rotation drive state via position. 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. , moves and urges the switching slider 31 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
The second gear 66 is meshed with the gear 23 of the reel shaft 21,
The tape running system is controlled to the tape rewinding state as shown in FIGS. 14 and 15, and tape rewinding is performed here. At this time, the first and second gears 63, 66 are switched through a non-power transmitting position where they are respectively disengaged from the gears 24, 23 by 11 degrees. Further, when the switching slider 31 is kept running in the tape reverse direction,
The tape reverse running position (moved in the E direction in the figure) is maintained, and the gear switching operation by the drive section 68a is not performed. In the tape running stopped state, when a fast-forwarding operator (not shown) is operated without fast-forwarding the tape, the fast-forwarding operating 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 moves the first reduction gear 6 at its lIi disengagement portion 70a.
The second driven part 62a is pressed in the axial direction to move it, and is controlled to switch to a high-speed rotation drive state via a non-power transmission position where it separates from the drive gear 61 and the second reduction gear 42. At the same time, the fast-forwarding operation member 69 presses the driven portion 67a of the connecting member 67 with its driving portion 69a to urge it to rotate clockwise in the figure. At this time, since the switching slider 31 controls the forward running position of the tape in the direction of the arrow F, the gear switching operation by the drive section 31b is not performed. At this time, if the switching slider 31 is in the tape forward running position in the direction of arrow E, the switching slider 31 is moved via the connecting member 67 by the drive section 69a of the fast-forward operation member 69.
is urged to move in the direction of arrow F, and the second
The first gear 66 is disengaged from the gear 23 of the reel shaft 21, the first gear 63 is brought into mesh with the gear 24 of the reel shaft 22, and the tape running system is controlled to the tape fast forwarding state as shown in FIG. becomes.

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 be in a fast-forward playback state by being slightly separated from the tape recorder mechanism. At this time, the fast-forward operation member 69 rotationally biases the lift lever 70 with its switching drive portion 69b, and switches the first reduction gear 62 to the high-speed traveling drive state via the axial non-power transmission position, 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 tape recording is performed.

Note that when the tape running direction is switched in the tape forward recording state, the reverse recording prevention portion 32i formed at one end of the reverse slider 32 prevents tape reverse recording.

In this way, the tape recorder controls switching of the tape running direction using the first and second gears 63.6 for driving the reel shaft.
6 by controlling the movement in the axial direction with the switching slider 31, for example, it is no longer necessary to have separate configurations for the constant speed running system and the high speed running system as in the past. The components can be simplified and the size can be reduced. Furthermore, since the same tape running system can run the tape in the forward and reverse directions, timing control is extremely easy, and handling, including manufacturability, can be improved as much as possible. It is possible to reliably prevent problems such as tape sagging and tape breakage due to malfunctions.

Note that this invention is not limited to the above embodiments, but also includes
It goes without saying that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a tape recorder that has a simple configuration, can be made smaller, and can be improved in handling. .

[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, 32G... 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...! ll group part 4゜...Trigger slider, 41...ASO lever, 41a...Engagement part, 42...Second reduction gear, 42a...Eccentric cam,
42b...Friction plate, 43...Head lever, 44.
...Supporting member, 43a...Spring engaging portion, 45...Spring member, 46.47...Pinch roller, 48°49.
...Capstan, 50...Head rotation mechanism, 32e
...Head driving section, 43b, 43C... Driven section,
32f, 32Q...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,
31b... Drive section, 67... Connection member, 67a...
- Driven part, 68... Rewind operation member, 69... Fast 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, 32h... Detachment drive section, 32i...
- Reverse recording prevention section. Applicant's agent Patent attorney Takehiko Suzue No. 3 Figure 11 #417

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 at a constant speed and high speed; 1. A tape recorder comprising: a switching control member for controlling the movement of two gears in the axial direction to separate one gear from the gear on the reel shaft to switch the tape running direction.