JPS58189856A - Reversal switching device of tape recorder - Google Patents

Abstract

PURPOSE:To control the running direction surely without using a plunger, by providing an exclusive drive source driver forward and backward in response to the constant speed and the high speed running mode and switching the running direction with the drive section. CONSTITUTION:Assuming that a main gear cam 41 is driven anticlockwise in the forward reproduction, in the operation of a reversal switching device 40 and a returning mechanism. The rotation of the cam 41 slides a reproducing slider 47 toward the E and heads 55, 82 are rotated in response to the running direction. The current of an assistant motor 42 rotating the cam 41 is made minute and the forward reproductions is done. When the reproduction slider 47 is restored to a stop, the motor 42 is reversed with a reverse signal and the cam 41 is rotated clockwise. The head 55 is rotated in response to the running direction when the cam 41 is engaged with the slider 47. In the returning mechanism formed at the lower side of the cam 41, a returning lever 70 is turned anticlockwise accompanied with the clockwise rotation of the cam 41.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a forward/reverse switching device for a tape recorder, and more particularly, to a forward/reverse switching device for a tape recorder that can reliably control the tape running direction using a dedicated drive source. It relates to a switching device.

[Technical background of the invention and its problems]

Conventionally, tape recorders have been provided with a forward/reverse switching device for switching the tape running direction.

As shown in FIG. 1, this forward/reverse switching device usually includes a pair of left and right gloss gears 11. , 12 were used to control this forward/reverse switching device. That is, on the main chassis 13, there are left and right playback sliders 14. Is is arrow A
, B directions, and one ends of left and right transmission levers 16.17 were engaged with the -@ portions of the left and right reproduction sliders 14.15, respectively.

The left and right transmitters 14-16.11 are rotatably supported by the main chassis 13 at their intermediate portions, and the other end portions are supported by the left and right sylangers 1, 1, J.
It is supported by the iron core parts 111 and 121 of J, respectively.

For example, when the right sylanger 12 is energized, its iron core 121 is attracted, and the right transmission lever knob is rotated clockwise in the figure. At this time, the right regeneration slider 15 engaged with one end of the right transmission lever 17 is slid in the direction of the arrow against the spring force of the return spring 18.
In conjunction with this right playback slider 15, the head slider 19
The return spring was also slid in the direction indicated by the arrow against the spring force of 2θ. Here, the recording/reproducing head 21 mounted on the head slider 19 is brought into contact with the tape surface, and the right pinch lever 22 is rotated in conjunction with the right playback slider 15 to move the right pinch roller 23 to the capstan. 24 through the tape, and playback was performed in the forward direction. Similarly, when the left plant gear 16 is energized, the left transmission slider 15 slides the left playback slider 14 in the direction indicated by the arrow.
In conjunction with this, the head slider 19 was also slid in the direction indicated by the arrow. Here, the recording/reproducing head 21 is brought into contact with the tape in accordance with the tape running direction and also brought into contact with the cab stan 27 via the left side, thereby performing reproduction in the reverse direction.

By the way, the forward/reverse switching device configured as described above is expensive because it uses two glands.
In addition, since a large current source is required, the power consumption increases and the maintenance cost of the tape recorder is approximately one song per song.In addition, the forward/reverse switching device installed in the tape recorder has
In some cases, the head moving mechanism is usually interlocked. And what about this forward/reverse switching device? During the running switching operation, the head moving mechanism is operated and the recording/reproducing head is removed so as to move in accordance with the tape running direction. Due to the interlocking relationship, the structure is complicated, the manufacturing process is complicated, and the cost is high.

[Purpose of the invention]

This defense was made in view of the above circumstances, and an inexpensive and good forward/reverse switching device for a tape recorder that does not use a grand gloss, has a simplified structure, and can reliably control the tape running direction. The purpose is to provide.

[Summary of the invention]

That is, the present invention provides a dedicated drive source that is driven in forward and reverse directions in conjunction with the operation of the tape constant-speed and high-speed tape running operation members, and the tape running direction is controlled by a drive unit that is rotationally driven in conjunction with this drive source. Switch. At this time, the drive section is locked and the tape is recorded and played back.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. That is, FIGS. 2 and 3 are a front side plan view and a back side plan view showing the overall configuration of a tape recorder to which the present invention is applied. First, in FIG. 2, a pair of reel stands 32 and 33 are rotatably supported on the front side of the main chassis 31, which is formed in a substantially rectangular shape, at substantially the center thereof. The pair of reel stands 32 and 33 have large diameter gears 34 and 35, respectively.
are coaxially formed.

Also, in the upper part of the figure on the approximate perpendicular bisector of the straight line connecting the rotation center axes of the reel stands 32 and 33, and on the back side of the upper & 2 main chassis 31, there is a reel motor 3 for running the tape.
6 (see Fig. 3, 8). The rotating wheel 3fil of the reel motor 36 protrudes toward the surface of the main chassis 31, and the center of rotation of the gear 37 is located at the tip thereof. A substantially ring-shaped friction member 38 is provided on the front side of the main chassis S so as to surround the gear 37, and this friction member 38 has a protruding portion corresponding to the reel stand 32, 33. 381 are integrally formed. Here, this friction member 38 is interlocked with the gear 31 with an appropriate frictional force,
The gear 37 is biased in the directions of arrows C and D depending on the rotational direction of the gear 37.

Further, the protrusion 38 of the friction member 38 has a rotary shaft 1
82 is implanted, and a gear 39 that is always in mesh with the gear 39 is rotatably supported on this rotating shaft 182.

Here, when the gear 37 is rotated counterclockwise in the figure by the reel motor 36, the friction member 38 is urged in the direction of the arrow. At this time, the nine gear 39 supported by the protrusion 18 meshes with the gear 35 of the reel stand 33, and the reel stand 33 is driven to rotate clockwise in the figure.

When the gear 37 is rotated counterclockwise in the figure by the reel motor s6, the protruding portion 1 of the friction member 38 similarly
A gear 39 supported at 8 meshes with a gear 34 of a reel stand 32, and this reel stand 32 is rotationally driven in the counterclockwise direction in the figure, allowing the tape (not shown here) to run in the forward and reverse directions. be. Further, the reel motor 36 changes the rotational speed and rotation direction according to the operation of a tape constant-speed running operating member (recording, forward and reverse direction playback) and a tape high-speed running operating member (fast forward, rewind) (not shown). is controlled by a reel motor drive circuit, which will be described later. When the operation member for tape constant speed and high speed running and the operation member (not shown) for stopping running of the tape (including pause) are operated, the rotor control circuit described later is controlled and the reel motor 36 is controlled according to the operation. It is possible to obtain rotation and stop conditions.

Next, on the main chassis 3, at the lower part of the reel stand 32, 33 in the figure, there is a forward/reverse switching device 40, which will be described later.
is installed. A substantially disk-shaped drive unit, such as a main gear cam 41, which will be described later, of the forward/reverse switching device 40 has its rotation center rotatably supported by a rotating shaft 411 implanted in the main chassis 3, and its outer peripheral portion A rounded portion 412 is formed at.

Here, a dedicated drive source, such as an assist motor 42, is provided on the side of the main chassis 31 corresponding to the main gear cam 41. As shown in FIG. 3, a gear 43 is rotatably supported on the rotating shaft of the anost motor 420, and reduction gears 44.degree. 45.46 are sequentially meshed with the gear 43.

The gear with the smallest diameter of the reduction gear 46 that is farthest from the gear 43 projects toward the front side of the main chassis 31 and meshes with the teeth 412 of the main gear cam 4. Therefore, when the gear 43 is rotationally driven by the unstuck motor 42, the rotation is caused by the reduction gear 44.4.
It is transmitted to the main gear cam 41 via a 5° 46 and is rotationally driven. Here, the assist motor 42 controls the direction of rotation and the stopped (motor lock) state by the combined operation of the operating member for constant speed tape running or the operating member for constant speed and high speed tape running. It is controlled by a circuit, an assist motor circuit, and an assist and overnight drive circuit, which will be described later.

Further, on the upper surface of the main gear cam 41, there is a regeneration slider 47 that is slidable in the directions of arrows E and F, the details of which will be described later, and a regeneration slider 47 that is slidable in the directions of arrows G and H.

Toss sliders 48 are sequentially arranged. Therefore, when the main ear cam 41 is driven to rotate as described above, the playback slider 41 is selectively slid in the direction of the arrow E or F depending on the direction of rotation, causing the tape to run in the forward or reverse direction. At the same time, the RAD slider 48 moves toward the arrow G.
It is something that is slid in the direction. At that time, the details of how the head slider 48 is engaged with both ends of the head slider 48 are explained later by selectively rotating left and right pinch levers 49 and 50, respectively. The left and right pinch rollers si and sz6 are brought into contact with the left and right gear stands 53 and 54 supported by the head slider 48 through the tape, and the recording and reproducing drive mounted on the head slider 48 is
5 chi! The device functions by bringing the device into contact with a predetermined surface of the device to produce a forward or reverse playback (recording) state. Here, the upper recording/reproducing head 55 makes the azimuth angle accurate in order to enable playback (recording) in the forward and reverse directions of tape running, that is, forward and backward movements, and adjusts the azimuth angle according to the tape running. The rotating mechanism 56 will be described later. Here, the pressure and right capstas 153, 54 are the rotation axes of the left and right flywheels 57, 511, respectively, and are rotatable from the back side of the main chassis 31 to the front side without rattling. It is inserted.

Here, as shown in FIG. 3, on the surface side of the main chassis 3, the pressure is
A main motor 59 is provided on the right side in the figure correspondingly, and a goo IJ 60 is supported on the rotating shaft of the main motor 59. A belt 61 is passed between this pulley 60, the above-mentioned pressure lever, and the right flywheel 57,58. Therefore, this left and right flywheel 57.5
8, the rotation of the main motor 59 is transmitted via a belt 61, and is constantly driven to rotate clockwise and counterclockwise in the figure.

Further, on the front side of the main chassis 3, an eject member 62 is supported on the left side in the figure so as to be slidable in the directions of arrows I and J in the figure. This eject member 62
is formed into a substantially bar shape and is disposed from the upper end to the lower end of the main chassis 31 in the figure. The eject member 62 has nine through holes 1 formed at one end thereof.
Sliding 5311 formed on main chassis 31 i21
and a through hole 62 formed at the other end.
After a shaft 312 formed on the main shear/31 is loosely inserted into the main shear/31, it is held down by a retaining ring 313 to be slidably supported. In addition, the eject member 6
2 is attached in the direction of arrow J by having a spring 63 engaged between a bent locking piece 623 formed approximately at the center thereof and a retaining shaft 314 formed on the main chassis 31. Forced.

Here, a lip portion 624 is formed at one end of the eject member 62, and the lock portion 624 biases the cassette lid in the direction in which it is normally opened. Sometimes, a portion of the cassette lid is opened to maintain the closed state. When an operator (not shown) is operated, the eject member 62 is slid in the direction of arrow 1 via the eject slider 64 against the biasing force of the spring 63. Then, the eject member 620 and the lip 624 are separated from the cassette lid, and the cassette lid is opened.

Further, on the main chassis 31, an erroneous erasure prevention member 68 comprising a cassette detection switch 65, a forward and reverse side erroneous erasure prevention switch, and a terror 6° 67 is provided on the upper side in the figure. There is.

Next, the forward/reverse switching device 40 will be explained. That is, as shown in FIGS. 4, 5, and 6, the rotatable main ear cam 41 is supported on the main chassis 31 in mesh with the small diameter gear of the reduction gear 48. Then, the lower th of this main gear cam 41
T1111 is formed with a curved protruding retaining portion 412 at the upper part of the rotating shaft 41 in the figure, and a pair of return members such as return levers 69.7 are arranged to sandwich the protruding retaining portion 412.
0 is formed. This pair of return levers 69.70
are rotatably supported at one end thereof by rotation shafts 691 and 701 respectively implanted in the main chassis 31,
The curved portions 6') respectively correspond to the protruding retaining portions 412 in the intermediate portions thereof! , 702 are formed.

Further, this pair of return z4 69*10 has locking portions 693 and 70 corresponding to the curved portions 692° and 702, respectively, with the main gear cam 410 rotating shaft 411 as a boundary.
3 is formed, and these locking parts 693, 103 are arranged so as to sandwich the protruding locking part 315 formed on the main shear 731. Furthermore, the return lever 69.1
0 has engaging portions 694 and 704 formed at the other end thereof, and a return spring 71 is engaged between the engaging portions 694 and 704. Here, the operation of the nine return mechanism configured as described above will be described later.

Also, a rotating shaft 411 on the upper surface side of the main gear cam 41
A protrusion 413 is formed that protrudes downward in the figure, and a protrusion 414 is formed approximately in the center of this protrusion 413 .

Here, on the upper surface of the main gear cam 41, the regeneration slider 47, which is approximately inverted T-shaped, is indicated by arrow E.

F″j: Disposed so as to be slidable in the J direction.The reproduction slider 47 has a curved through hole 471 formed at its central end, and a notch 472 at one end of this through hole 471. The protrusion 413 of the main gear cam 41 is inserted into this through hole 471, and the protrusion 413 of the main gear cam 41 is inserted into the through hole 471.
The tip portion 415 of No. 3 is opposed to the cutout portion 472 of the through hole 471.

Further, a substantially T-shaped through hole 473 is formed at one end of the reproduction slider 47, and a sliding portion protruding in a T-shape from the side of the main chassis 31 is inserted into the through hole 473. 316 is fitted. Furthermore, this reproduction slide finisher 47 has a through hole 474 formed at the other end, and a shaft 311 installed in the main chassis 31 is inserted into the through hole 414.
After being loosely inserted, an extension part 475 is formed at the central end of the screw 318 and extends to the right in the figure, and the main chassis is inserted into the through hole 476 formed in the extension part 725. A shaft 319 implanted in 31 is inserted therethrough.

However, the reproduction slider 47 is supported so as to be slidable in the directions of arrows E and F.

Furthermore, a recess 477 is formed in the reproducing slider 47 at approximately the center of its lower side, and a notched fitting part 478 is formed in the recess 127. A part of the head moving mechanism 56, which will be described in detail later, is engaged with this fitting portion 478.

Further, the playback slider 47 has bends @72 and 73 formed at one end and the other end, respectively, and locking parts 721 and 731 are formed in the bends 7!2 and 73, respectively. ing. The bent portions 491.501 of the left and right pinch levers 49.50 (details of which will be described later) are attached to the locking portions 721.731 of the playback slider 47, the details of which will be described later.
It is selectively locked in response to sliding in the F direction.

Next, on the upper surface of the playback slider 47, there is a substantially inverted T-shaped rear chassis 48 indicated by arrow G.

It is arranged to be slidable in the H direction. This head chassis 48 has a recess 481 formed at the tip of its central end, and the shaft 69 of the main chassis 31 is inserted into the recess 48.
By inserting a shaft 482 installed between 1.791 and 1.791, it is slidably guided in the directions of arrows G and H in the figure.

The head chassis 31 is slid in the direction of the arrow G S until the bottom of the recess 481 comes into contact with the shaft 482 .

Further, a through hole 483 is formed at the central end of the head chassis 48 in correspondence with the rotating shaft 411 of the main ear cam 4, and the through hole 4830 is formed at the lower end in the figure.
The rotation hole 484 is formed in a horizontally long shape corresponding to the rotation orbit of the protrusion 4140 of the main gear cam 41. The through hole 483 is provided with the rotating shaft 411 of the main gear cam 41.
is inserted through the rotation hole 484, and the main gear cam 4 is inserted into the rotation hole 484.
The protrusion 414 of No. is inserted.

Therefore, in the herad chassis 48, as the main gear cam 41 rotates, the tip 415 of the protrusion 413 of the main gear cam 41 slides the regeneration slider 47 to a predetermined position, and the subsequent rotation of the main gear cam 41 As a result, the protrusion 414 engages with a portion of the rotation hole 484 and is slid into a predetermined position.

Further, the helad chassis 48 is provided with bent locking portions 485 and 486, which are formed substantially orthogonally to the corner portions at both ends thereof.

The left and right pinch rollers 51 and 52 are respectively disposed on the bending locks 94B5 and 486.

The left and right pinch rollers 51 and 52 are each 141
Left and right pinch levers 49.5 shaped in a U-shape
Rotating shafts 492 and 502 are rotatably supported at one end of the
Each is rotatably supported. Further, at the other ends of the left and right pinch levers 49,50, there are projecting portions 4 corresponding to the bent engagement portions 72, 73 of the reproduction slider 47.
93 and 503 are formed respectively, and these protruding parts 493,
503 is formed with bent portions 49 and 5o3, respectively.

Further, torsion springs 74 are attached to the rotation shafts 492 and 502 of the left and right pinch levers 49 and 50, respectively.
．． 75 is wound and attached, and one end of this torsion spring 74, 75 is attached to the left and right pinch levers 4, respectively.
It is engaged with the back part of 9.50. The other ends of the tone springs 74 and 75 are respectively engaged with the bent locking portions 485 and 486 of the Rad slider 48. So, this left and right pinch lever 49.5
0 is rotated counterclockwise and clockwise in the figure, respectively, when the Rad slider 48 is slid in the direction of arrow G. At this time, the bent portions 491.5 of the protruding portions 493.503 of the left and right pinch levers 49.50
As the playback slider 47 slides in the directions of arrows E and F, one of the sliders 01 selectively bends and engages its bent engagement portions 485 and 486.
At the same time, the other left and right pinch rollers si and s2 are engaged with the left and right pinch rollers si and s2, and the other left and right pinch rollers Z-49 and Z-50 are rotated, so that the left and right pinch rollers si and s2 are locked with the left and right pinch rollers si and s2, and their rotation is prevented. Stan j
J p 54.

Here, as mentioned above, the chassis 48 has a locking portion 487 formed at one end corresponding to the shaft 317 of the main chassis 31, and a locking portion 488 at the other end that allows the main chassis 31 to slide. It is formed corresponding to the portion 316. Therefore, the sliding movement of the spare chassis 48 in the direction of the arrow H is performed until the retaining parts 487 and 4118 come into contact with the shaft 317 and the sliding part 316 of the main chassis 310. Here, the toss slider 48 has a spring 76 engaged between a locking piece 489 formed at the other end and the sliding portion 316 of the main chassis 31, so that the toss slider 48 is biased in the direction.

Further, to the above, the head mounting structure 77 of the head rotation mechanism 56 is attached to the tosslider 48 approximately in the center thereof with screws 77.
It is attached by.

This head mounting structure 77 includes a base plate 78 and a gear 7.
9 is integrally supported, and a substantially fan-shaped layered gear 8o that meshes with this gear 79 is rotatably supported at its base. Further, a substantially cylindrical head support 81 is attached to the head base plate 78, and this head support 8 is provided with an upper recording/reproducing head 55 for a micro force set data recorder and an erase/remove drive. 82 are arranged in parallel and fitted.

Here, with the head mounting structure 77 attached to the reel slider 48, the tape contact (8) of the recording/reproducing head 55 and erasing head 82 is placed on the reel stand 32.3.
It is facing 3.

Further, the fan-shaped gear 8o has a driven portion 8 from its base.
0 is extended, and this driven portion 801 is interposed within the fitting portion 408 of the reproduction slider 47. Note that even when the Rad slider 48 is slid in the directions of arrows G and H, the driven 5801 does not separate from the fitting portion 408 and is always interposed within the fitting portion 408. . Therefore, when switching the tape from the forward direction to the reverse direction and from the reverse direction to the forward direction, the playback slider 47 is
As the fan-shaped gear 80 is slid in the direction F and
is rotated about its base.

For example, when the sector gear 80 is rotated in one direction in the figure, the gear 79 that meshes with the sector gear 80 is rotated clockwise in the figure.

Accordingly, as the gear 19 rotates, the head base plate 78 and the disk support 81 are rotated in the same direction, and the recording/reproducing head 55 and the disk 82 are rotated exactly 1800 times. Here, a track change (head movement) is performed when switching between forward and reverse tape running. In addition, the fan-shaped gear 8
When o is rotated clockwise in the figure, the gear 79, the head plywood 78, and the head support 81 are rotated counterclockwise in the figure, and the recording/reproducing head 55 and the erasing head 82 are returned to their original positions. Of course, it will be returned to .

Further, a pair of locking portions (not shown) are formed in a part of the head base plate 78, and a pair of screws 772.7 are provided in the head mounting structure 77 corresponding to the pair of locking portions.
73 is screwed on. Therefore, the head base plate 78 is rotated until one of the pair of locking portions contacts the pair of screws 772 and 773 of the mounting structure 77 toward -L. Therefore, by adjusting the depth of engagement of the screws 772 and 773, it is possible to perform anomalous adjustment of the recording/reproducing head 55 and the erasing head 82.

Further, the recording/reproducing head 55 and the erasing head 82 are connected to an electrical circuit of a recording/reproducing system (not shown) via a connection line (not shown).

Furthermore, a pair of arrows are displayed on the circumferential side of the head support 8 to indicate the tape running direction, and on one side thereof, there is a tape guide that supports both ends of the tape in the width direction. A portion 83 is formed.

Further, a torsion spring 84 is wound around and attached to a part of the head mounting structure 77, and one end of the torsion spring 84 is attached to the center of rotation of the tooth ◆79, and the other end is attached to the center of rotation of the tooth ◆79. is locked to the base of the sector gear 800. Therefore, the head support 78 is stably held in two positions in the forward and reverse tape running states by the biasing force of the torsion spring 84.

Next, the operations of the forward/reverse switching device 40 and the return mechanism configured as described above will be described in detail. First, suppose that the main gear cam 41 is rotationally driven in the counterclockwise direction in the figure by operating the constant-speed tape running operation member (forward playback) as described above in the stopped state as shown in FIG.

Then, as the main gear cam 4 rotates, as shown in FIG. Slide it in the direction of arrow E. Here, as the writer/student slider 47 slides, the head rotation mechanism 56 rotates the do 82 corresponding to the tape running direction from recording/reproducing to do 55 and erasing. At this time, the projection 414 of the projection 413 of the main gear cam 4 is engaged with the right side of the rotation hole 484 of the ped slider 480 in the drawing. Therefore, as the main gear cam 41 rotates thereafter, the regeneration slider 41 moves in the direction of arrow E as the tip 415 of the protrusion 413 comes into sliding contact with the curved portion 471 of the regeneration slider 41, as shown in FIG. Although not biased, the helad chassis 4g is biased in the direction of arrow G by the protrusion 414 of the protrusion 413, and is slid to a predetermined position. At this time, the bent locking portions 485, 48 of the head slider 48
The left and right pinch levers 49 and 50, which are engaged with the levers 6 through torsion springs 74 and 75, are biased clockwise and counterclockwise in the figure, respectively. So, this left and right pinch 1/par 49.50 home, left pinch lever 4
Since the reproducing slider 47 is located furthest in the direction of arrow E, the reproducing slider 47 is locked by the locking portion 12 at one end thereof and its rotation is prevented.

On the other hand, the right pinch lever 50 is rotated clockwise in the figure without being locked by the locking part 73 at the other end of the reproduction slider 41, and the right pinch roller 52 is moved to the right canostan 54 as described above. be touched. Here, the assist motor 42, which rotationally drives the main gear cam 41, is supplied with a very small amount of current to be in a motor locked state, and the tape is played back in the forward direction.

Here, the return mechanism configured on the downward side of the main gear cam 41 is rotated in the counterclockwise direction in the drawing of the main gear cam 41, as shown in FIG. One end is brought into contact with the curved part 692 of the return lever 6g on the left side in the figure, and as the return lever 69 rotates, the return lever 69 resists the spring force of the return spring 71 and rotates against the rotation shaft 69.
It is rotated clockwise in the figure around 91. On this occasion,
The return lever 70 on the right side of the drawing is locked by a protruding locking portion 315 of the main chassis 3, so that it cannot be rotated clockwise in the drawing. When the above-mentioned recording/reproducing head 55 and erasing head 82 finish rotating, that is, when the head slider 48 starts sliding, the protruding retaining portion 412 of the main gear cam 41 moves back to the above-mentioned position as shown in FIG. The lever 69 is moved along the curved portion 692, and the return lever 69 is further rotated clockwise in the figure. Therefore, as shown in FIG. 11, when the main gear cam 4 rotates so that one end of the protruding retaining portion 412 is positioned at one end of the curved portion 692 of the return lever 69, the return lever 69 Rotation is stopped. As shown in FIG. 12, when the head slider 48 has completely slid, the main gear cam 41 is
69 is in contact with one end of the curved portion 692. At this time, the return lever 69 is biased in the direction of the arrow by the return spring 51 that is engaged with a portion thereof.

It is also assumed that in the forward playback state, the end of the tape has arrived, a tape end detection device (not shown) determines this, and the current supply to the assist motor 42 has decreased. Then, as shown in FIG. 13, the head slider 48 is moved back in the direction of arrow H by the biasing force of the spring 70.

As the head slider 48 moves backward, the main gear cam 41 is rotated clockwise in the figure by the biasing force of the return spring 7 and slides the head slider 48 as shown in FIG. move it back to the starting position. At this time, on the bending portions 485, 486 of the head slider 48,
Left and right pinch levers engaged respectively 49°50
In the figure, the hour hand is rotated counterclockwise, and the left and right pinch rollers 52.
It is to be separated from.

Here, the main gear cam 4 positioned as described above is thereafter returned to the stop position by the spring force of the return spring 7 of the return mechanism. That is, as shown in FIG. 15, the main gear cam 41 is moved by the spring force of the return spring 71 with its protruding engaging portion t12 slidingly in contact with the curved portion 629 of the return lever 69 on the left side of the figure. As a result, the main gear cam 41 is rotated clockwise in the figure and comes to a stopped state as shown in FIG. 16. At this time, the regeneration slider 47, which had been urged in the direction of the arrow E by the tip 416 of the protrusion 413 of the main ear cam 41, slides in the direction of the arrow E as the main gear cam 41 rotates clockwise in the figure. It is moved and returned to the stopped position.

When the motor is returned to the stopped state as described above, a reversal signal is sent to the assist motor 42, and the assist motor 42 is driven in reverse. Then, main gear cam 41
is reversed and rotated clockwise in the figure, and the forward/reverse switching device 40 is operated to create a reproducing state in the reverse direction.

That is, as shown in FIGS. 17 and 18, as the main gear cam 41 rotates clockwise in the drawings, the tip 415 of the protrusion 413 engages with the notch 48 of the regeneration slider 47.
4 in the left side of the figure, and slides the reproduction slider 47 in the direction of arrow F. Here, this playback slider 47
As the recording/reproducing head 55 slides, the recording/reproducing head 55 is rotated by the head rotation mechanism 56 described above in accordance with the tape running direction. At this time, the protrusion 414 of the protrusion 413 of the main gear cam 41 is engaged with the left side of the rotation hole 484 of the head slider 48 in the drawing. Therefore, as the main gear cam 41 rotates after 7,
As shown in FIG. 19, the playback slider 47 is not biased in the direction of arrow F because the tip 415 of the protrusion 413 comes into sliding contact with the curved portion 471; -748 is the protrusion 4 of the protrusion 413
14 in the direction of arrow G and slide to a predetermined position. At this time, a tone spring 74.7 is applied to the bent locking portion 485.48g of the head slider 48.
5, left and right pinch levers 49.
50 are biased counterclockwise and clockwise in the figure, respectively. Therefore, among the left and right pinch levers 49 and 50, the right pinch lever 50 is locked by the locking portion 73 at the other end of the playback slider 47 because the playback slider 47 is located furthest in the direction of arrow F. , its rotation is prevented. On the other hand, the left pinch lever 49 is connected to the playback slider 47.
The left pinch roller 51 is rotated counterclockwise in the figure without being locked by the locking part 72 at one end, and the left pinch roller 51 comes into contact with the left diaphragm stan 53 as described above. Here, in the same way as described above, the current supplied to the assist motor 42 is made very small, the motor is locked, and the tape is reproduced in the reverse direction.

Here, the return mechanism configured on the lower surface M of the main gear cam 41 is configured such that the other end of the protruding engagement portion 412 is located on the right side of the figure as the main gear cam 41 rotates clockwise in the figure. The return lever 70 is engaged with the curved portion 702 of the return lever 70, and the return lever 70 is rotated in the direction h [in the figure] about the rotation shaft 70 against the spring force of the return spring 71. At this time, the return lever 69 on the left side in the figure is locked by the protruding locking part 315 of the main chassis 31, and the counterclockwise force "
i'' is not rotated. As the main gear and cam 41 subsequently rotate, the return lever 70 on the right side in the figure is further rotated counterclockwise in the figure by the protruding engagement portion 412. In the reproducing state in the reverse direction when the head slider 48 has completed sliding, the protruding retaining portion 412 of the main gear cam 41 is in a state in which its approximately central portion is engaged with one end of the curved portion 702 of the return lever 7°. This is what has been done.

Next, a circuit for controlling the tape recorder will be explained. That is, as shown in FIGS. 19, 20, and 21, the Ronok control circuit 85 is connected to the current B, and its ground terminal (GND) is grounded. This rotary control circuit 85 has a forward playback input terminal (F, PLAY) and a reverse playback input terminal (P, PLAY).
AY ), recording input end (REC), fast forward input end (F'
, F), rewind input terminal (RIiW), stop input terminal (5
TOP ) and pose input! (PAUSE) are connected to switches 86 to 92 which are grounded. Therefore, the Ronok control circuit 85 is configured to control the switches 86 to 9.
2 is operated, the input terminals F, PLAY, R, PLAY, REC corresponding to the switches 86 to 92 are operated.
.

RhW, F, F, 5TOP and PAUS E are brought to the ground potential (hereinafter referred to as L level).

Then, the forward direction reproduction input terminal (Fout:) corresponding to the input terminal which has become the L level + the reverse direction reproduction output terminal (P-o
ut) r Recording output end (REC, out) p Rewind output 4 (REW, out) Fast forward output end (FF,
out) and the pause output terminal (PAUSE, out) become high level (hereinafter referred to as H level), and based on this signal, the assist motor 42, reel motor 36, and main motor 59 are controlled to run the tape, stop running, etc. It is what is done.

Here, the assist motor 42 is connected between the midpoints of transistors Qt+QzeQs=Q< which are connected in a curved shape. These transistors Ql, Qm, Q
s, the valley trunk star Q□ r on the upper side of the figure in Q4
Qs each has a diode D 1 r at its base.
Dz and the resistor R1°Rxf are connected to the forward reproduction input terminal (F, out) and the reverse reproduction output terminal (R) of the Ronok control circuit 85.

out). Further, among the transistors Qs, Qx-Qs, and Q4, the bases of the transistors Qs and Qa on the upper side of the figure are connected to each other's collectors through the respective resistors R1+R4,
Its emitters are connected to voltage #B via transistors Qs configured to control the current of the assist motors 42, respectively. The base of this transistor Qs is connected to the collector of the transistor Q through a Tuna diode Ds which is connected to the power supply B through a resistor R1, and the pace of this transistor Q is connected to a diode D4 and a resistor R6. It is connected to the signal output terminal (T, out) of the Ronok control circuit 85 through the terminal.

Further, the fast forward output terminal (FF
one input terminal of a NAND circuit Nl and N is connected to the rewinding output terminal (R, out),
This Nando circuit N! The other input terminals of N8 and N8 are commonly connected to the output terminal of a NAND circuit N connected to a selection switch 93, which will be described later. In addition, the above NAND circuit N,
N.

The output ends of each of them are connected to the assist motor 42.
NAND circuits N4 and N which give normal rotation or inversion signals to
, are connected in common to the input ends of the NAND circuits N, and are connected correspondingly to the input ends of the NAND circuit N, respectively. here,
The output terminal of the NAND circuit '1ltNa*Ns is connected to the connecting terminal 94.95 of the assist motor drive circuit, and the assist motor 42 is rotated in the normal direction or in reverse direction according to the operation of the switch 86 or 87. There is. Furthermore, the output terminal of the NAND circuit NG is the NAND circuit N7.
The other input terminal of this NAND circuit N7 is connected to the position detection switch 96 via a resistor R7, and its output layer is connected to one input terminal of the NAND circuit N. It is connected. Furthermore, the NAND circuit N-, whose input terminals are commonly connected to the output terminal of the NAND circuit N, is connected to the NAND circuit N1 through the capacitor C1 and resistor R.
is connected to one input end of the This NAND circuit Nl
o has its other input terminal connected across the other to the other input terminal of the NAND circuit N, and its output terminal is connected to the NAND circuit Nil which extracts the current control signal via the capacitor C1. ing. This NAND circuit N
The output end of il is the connection end 9 of the assist motor drive circuit.
Connected to 1.

Next, the reel motor 36 is connected to the assist motor 4.
The transistor Qr is connected in a prismatic shape in the same way as 2.
= Qs, connected between the midpoints of Q kai + Qso. Of these transistors Qy+Qs+Qi, Qto, each of the transistors Qy, Qs on the lower side of the figure has its pace connected to the positive direction regeneration output terminal ( F,ou
t) Connected to the reverse playback output terminal (R, out).

In addition, the above transistor Qte+Q@+Qe r
Of Qse, each transistor Q・tQs on the upper side of the figure
- are connected to each other's collectors through resistors R11l and Rlm, respectively, and their emitters are connected to am and a through transistors Qss configured to control the current of the reel motor 36, respectively. It is connected. The pace of this transistor Qst is
Tuna diode 01 connected via resistor atS to
is connected to the collector of the transistor Q11 through the transistor Q11, and is connected to the positive direction reproduction output terminal (F, out) of the above-mentioned LO control circuit 85 through this transistor D, a resistor R14, a diode D, and a resistor RIS, respectively. , reverse playback output end (R,
out).

Further, the main motor 59 has one end grounded,
The other end is connected to the collector of the transistor Qls. The emitter of this transistor Q13 is connected to the power supply B, and its base is connected to the collector of the tractor and star Qxz through the resistor R1@.

That is, when a power switch (not shown) is operated to perform forward playback, the signal output terminal (T, out) of the Ronoch control circuit 85 is set to H level. Therefore, if the switch 86 is operated at the current time TI, the output terminal (T, os+t) of the logic control circuit 85Q becomes L level υ, the transistor Q is turned off, and the forward reproduction output terminal ( F, out) is at H level, transistor Q! is turned on, the assist motor 42 receives enough current to be driven in a predetermined direction for a predetermined time (
until time TI) and is driven in forward rotation. Therefore, as described above, the main gear cam 41 is rotated to operate the forward/reverse switching device to run the tape in the forward direction. At this time, in conjunction with this switching operation, the aforementioned head rotation mechanism is operated to bring the recording/reproducing head 55 into contact with the tape surface in accordance with the tape running direction, and the right pinch lever 50 is rotated. The right pinch roller 52 is brought into contact with the right cazostane 54 via the chi f. At this time,
Ronok $11 (signal output terminal of ii1 circuit 85)
When T,out) is at H level, transistor Q is turned on.

Instead, a small predetermined current is supplied to the upper-side self-assist motor 42, and the motor is brought into a state of rotation.
The tape is played back in the forward direction.

On the other hand, the assist motor 42
At time T8 when the motor is locked, transistors Q7 and Q1 are turned on and driven.

Therefore, this reel motor 36 is driven at a rotational speed and a rotational direction corresponding to the constant speed running of the tape in the forward direction, and as described above, the gear 39 meshes with the gear 35 of the reel stand 33 to move the tape at a constant speed in the forward direction. Running takes place.

Here, the main motor 59 is driven by turning on the transistor Q1m at time T1 when the switch 85 for forward regeneration is operated. As described above, the rotation of the main motor 59 is controlled by the left and right gear stands 53.
．． 54 with left and right flywheels 57 and 58, respectively.
transmitted via.

Next, suppose that the switch 87 is operated at time T1 in order to perform reproduction in the reverse direction while the power switch is operated. Then, in the same way as described above, the signal output terminal (T,out) of the rotary control circuit 85 becomes L level, transistor Q is turned off, and the reverse reproduction output 4 (R,out) becomes H level. Therefore, transistor Q3 is turned on. Then, the assist motor 42
is supplied with a current sufficient to drive in a predetermined direction for a predetermined time (at time T11) and is driven in reverse. Therefore, as described above, the main gear cam 41 is rotated to operate the forward/reverse switching device to run the tape in the opposite direction.

At this time, the aforementioned head rotation mechanism 56 is operated in conjunction with this switching operation, and the recording/reproducing head 55 is brought into contact with the tape surface in accordance with the tape running direction, and the left pinch lever 49 is rotated. , the left pinch roller 51 is brought into contact with the left capstan 53 via a tape. At this time, similarly to the above-described forward direction reproduction state, the signal output terminal (T, out) of the oscillation control circuit 85 becomes H level, and the transistor Q is turned on. Therefore, a small predetermined current is supplied to the assist motor 42, the motor is locked, and the tape is reproduced in the reverse direction.

On the other hand, the reel motor 36 is driven by turning on the transistors Q1 and Qs at time T when the assist motor 42 is locked.

Therefore, this reel motor 36 is driven at a rotational speed and rotational direction corresponding to the constant speed running of the tape in the reverse direction, and as described above, the gear 39 meshes with the gear 34 of the reel stand 32, thereby stabilizing the tape in the reverse direction. Fast running takes place.

Here, the main motor 59 is driven by turning on the transistor Qts at the time Tl when the switch 87 is operated, as in the case of the forward direction regeneration described above.

-Also, switch 89 is used to run the tape in fast forward mode.
When you operate , the fast forward output terminal of the logic control circuit 85 (
The reel motor 36 is driven by a fast-forwarding circuit (not shown) connected to FF, *ut) at a rotational speed and rotational force direction corresponding to the tape fast-forwarding state, and stable fast-forwarding of the tape is performed.

Here, in order to run the rewind tape, switch 90 is pressed.
When the reel motor 36 is operated, a rewind circuit (not shown) connected to the rewind output terminal (Rj!lW,out) of the logic control circuit 85 causes the reel motor 36 to change the rotation speed and rotation direction corresponding to the chive rewind state. This is driven by a stable Q-F rewinding motion.

Also, in order to perform fast-forward playback (cue), switch 8
Suppose that 6 and 89 are operated in a composite manner. Then, the selection switch 93 is turned on, the output terminal of the NAND circuit N becomes L level, and the fast forward output terminal (FF,out) of the logic control circuit 85 becomes H level. Therefore, the output terminal of the NAND circuit N4 becomes H level, transistor Q1 of the assist motor drive circuit is turned on, and transistor Q- is turned on as described above, so that a current sufficient to drive the assist motor 42 in a predetermined direction is generated. It is supplied and driven in normal rotation. Therefore, the main gear cam 4 is rotationally driven to operate the forward/reverse switching device, functioning to run the tape in the forward direction, and rotating the recording/reproducing head 55 in accordance with the direction of tape running.

Thereafter, as described above, the head slider 48 slides, the recording/reproducing head 55 lightly touches the tape surface, and the position detection switch 96 is turned off before the right pinch roller 52 comes into contact with the right capstan 54. Then, the NAND circuit N@
, N7 , N@rN@ + N1(l) causes the output terminal of the NAND circuit Nll to go to H level, turning on the transistor Q of the assist motor drive circuit. Therefore, a minute current is supplied to the upper self-assist motor 42. and the motor is locked, and here is a fast-forward playback (
cue) is performed.

Here, it is assumed that the switches 87 and 90 are operated in combination in order to perform rewind playback (review). Then, the selection switch 93 is turned on, the output terminal of the NAND circuit N becomes L level, and the rewinding output terminal of the logic control circuit 85 becomes H level. Therefore, Nand circuit N
1 becomes H level, the transistor Q1 of the assist motor drive circuit is turned on, and the transistor q- is turned off as described above, and the anosto motor 42 is supplied with enough current to be driven in a predetermined direction and reversed. Driven.

Therefore, the main gear cam 41 is rotationally driven to operate the forward/reverse switching device, so that the tape runs in the forward direction (77), and at the same time, the key 55 is switched to recording/playback. Rotate according to the direction of travel. Thereafter, the head slider 48 slides as in fast-forward playback, the recording/reproducing head 55 lightly touches the tape surface, and the position detection switch 96 is turned off before the left pinch roller 51 comes into contact with the left steering wheel 53) NAND 9 circuit N@#N7・N, ・N9・N1・ makes NAND circuit N1! The output terminal of becomes H level, and the transistor Qs of the assist motor drive circuit is turned on. In other words, the assist motor 42 is supplied with a minute current to be brought into a motor lock state, and rewind playback (review) is performed here.

In addition, as another embodiment, the same implementation can be achieved by configuring as shown in FIGS. 23 and 24. That is, as described in the above embodiment, the main gear cam 41 that is rotationally driven has a protrusion 416 that protrudes downward in the figure on the rotating shaft 411 on its upper surface.
A pair of protrusions 41 protruding toward the upper surface are provided at the middle part of the 6.
7,418 is formed. The protrusion 416 of the main gear cam 41 is inserted into the curved through hole 47 of the regeneration slider 47 described in the above embodiment, and the protrusion 416
The distal end portion 419 of the through hole 471 is opposed to the cutout portion 472 of the through hole 471.
83 and the rotation hole 484, a substantially rectangular rotation hole 48 is provided.
10 is formed.

A protrusion 4811 is formed in the stiff rotation hole 4810 at the center of one side passage in the upper part of the figure, and this protrusion d 4 II
71 has sloped portions 4812.48 on both sides thereof, respectively.
13 is a pair of projections 417 of the main gear cam 41.
4111.

In other words, in order to perform regeneration in the forward direction, when the Teno constant speed traveling → operating member (forward regeneration) (not shown) is operated, the main gear cam 4 rotates to the gravitational force rotation in the figure as described in the above embodiment. Driven. Then, as shown in FIG. 25, at the initial stage of rotation of the main gear cam 41, the tip end 419 of the protrusion 416 touches the notch 4 of the reproduction slider 47.
72 on the right side in the figure, and slides the reproduction slider 47 furthest in the direction of arrow E. Here, as the playback slider 47 slides, the head rotation mechanism 56 described in the above embodiment is operated to cause the recording/playback head 55 to correspond to the tape running direction. At the beginning of the rotation of the main gear cam 4, the head slider 48 moves while the protrusion 418 on the right side in the figure of the main gear cam 4 is in sliding contact with the inclined part 4813 on the right side in the figure. Therefore, this head slider 48 is made to slide in the direction of arrow G with respect to the rotation angle of the main gear cam 41 against the spring force of the spring 70, which is extremely small. Thereafter, the sliding cover of the head slider 48 is increased in accordance with the rotation angle of the main gear cam 41, and the head slider 48 slides against the spring force of the spring 7o to a predetermined position as shown in FIG. It is something that will be done. Except for this, as described in the above embodiment, the recording/reproducing head 55
is brought into contact with the tape surface, the right pinch lever 50 is rotated, and the right pinch roller 52 is brought into contact with the right diaphragm stan 54 via the tape. Here, as described in the above embodiment, the assist sweater 42 is supplied with a minute current to be brought into a motor lock state, and the tape is then played back in the forward direction.

Here, it is assumed that in the forward playback state, a tape running stop operation member (not shown) is operated to stop the cheap recorder, and the current supply to the assist motor 42 is cut off. Then, as shown in FIG. 23, the head slider 48 is moved back in the direction of the arrow H by the spring force of the spring 70. At this time, as the head slider 48 retreats, the protrusion 418 of the main gear cam 41 is pressed, so that the main gear cam 4 is rotated clockwise in the figure, and the head slider 48 and regeneration slider 47 are moved to the stop position. It will definitely be returned.

Furthermore, in order to perform reproduction in the reverse direction, when a constant speed tape running operation member (not shown) is operated, the main gear cam 41 is rotated and driven clockwise in the figure as described in the above embodiment. Ru. Then, as shown in FIGS. 27 and 28, at the initial stage of rotation of the main gear cam 41,
The tip 419 of the protrusion 417 engages with the left side of the notch 472 of the reproducing slider 47 in the figure, causing the reproducing slider 47 to slide furthest in the direction of arrow F. Here, as the playback slider 47 slides, the head rotation mechanism 56 described in the above embodiment is operated to cause the recording/playback head 55 to correspond to the tape running direction. In addition, the main gear cam 4
At the beginning of the first rotation, the head slider 48 moves while the protrusion 417 on the left side in the figure of the main gear cam 41 slides into contact with the inclined part 4812 on the left side in the figure. Therefore, the head slider 48 makes an extremely slight sliding movement in the direction of arrow G relative to the rotation angle of the main gear cam 4 against the spring force of the spring 7o. Thereafter, the sliding cover of the head slider 48 is increased in accordance with the rotation angle of the main gear cam 41, and is slid to a predetermined position against the spring force of the spring 70, as shown in FIG. It is something.

At this time, as described in the above embodiment, the recording/reproducing head 55 is brought into contact with the tape surface, the left pinch lever 49 is rotated, and the left pinch roller 51 is brought into contact with the left cazo stun 53 via the tape. be done. Here, as described in the above embodiment C, the assist motor 42 is supplied with a minute current to be brought into a motor lock state, and the tape is then played back in the reverse direction.

Here, from the above-mentioned pressure and reverse playback, it goes without saying that fast-forward and rewind tape running and fast-forward and rewind playback (cue and revie) are performed reliably in the same way as in the above embodiment. That's true.

In addition, although the above embodiment and other embodiments are realized using a head rotation mechanism, it is also possible to realize it using a fixed head. Therefore, it goes without saying that various modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As described above, according to the present invention, the tape running direction can be reliably switched by using a drive unit that is rotationally driven by a dedicated drive source, without using a planter, and constant speed and high-speed playback of the tape can be ensured. To provide a forward/reverse switching device f for a chip recorder that is extremely simple in structure and inexpensive and can be precisely controlled and can reliably return the forward/reverse switching mechanism and the drive part to the stop position f by cutting off the source supply of the drive source. can do.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a forward/reverse switching device wt of a conventional CH recorder, FIG. ,
Similarly, FIG. 4 is an exploded perspective view showing an embodiment of the present invention, FIG. 5 is a plan view showing the configuration of the front side of the main gear cam, and FIG. FIGS. 7 and 8 are plan views showing the configuration of the return mechanism arranged in FIG. 5, and FIGS.
The figures are a plan view showing the operation of Fig. 6, and Figs. 17 to 19.
Figure C is a plan view showing the operation of Figure 5; Figure 20 is a circuit configuration diagram showing an example of each drive circuit for applying appropriate current to the assist motor, reel motor, and main motor; Figure 21 is a plan view showing the operation of Figure 5; Block circuit configuration diagram showing an example of a control circuit when the assist motor is running at high speed, No. 22
The figure shows a timing diagram showing the constant speed running and stop switches, the output terminal of the Ronok control circuit, and the signal status of each motor.
FIG. 23 is a plan view showing another embodiment of the present invention;
4 is a 1s8+ perspective view showing the front-side component configuration of FIG. 23, and FIGS. 25 to 29 are plan views showing the operation of FIG. 23. 31... Main chassis, 32... Reel stand, 33
...Reel stand, 34.35...Gear, 36...Reel motor, 37...Gear, 38...Friction member, 3
9... Gear, 40... Forward/reverse switching device, 41... Main gear cam, 42... Assist motor, 43...
Gear', 44, 45, 46... Reduction gear, 47...
Playback slider, 48...Head slider, 49...
Left pinch lever, 50...right pinch lever/J-151.
...Left pinch roller, 52...Right pinch roller, 53
...Left capstan 0 stun, 54...Right capstan, 5
5... Recording head, 56... Head rotating machine, 57
...Left fly wheel 1-=L, 58...Right fly wheel 1 wheel A
159...Main motor, 60...7'-ri, 61
...belt, 62...innoect member, θ3...
Spring, 64... Innoft slider, 65... Cassette detection switch, 66.67... Erroneous erasure prevention switch, 68... Erroneous erasure prevention member, 69.70... Return/mar. 71...Return spring, 74.75...Tone spring, 76...Spring, 77...Head removal structure, 78...-\D base plate, 79...Gear,
80... sector gear, 8...-head support, 82...
...Erasing head, 83...Date guide section, 84...
・Torsion spring, 85... Rono control circuit, 86° 87.88, 139, 90, 91.92...
Sui. Te, 93...Return switch, 94t95...To connection, 96...Position detection switch, 97...Connection end.

Claims (1)

[Claims] A dedicated drive source that is driven forward and backward in conjunction with the operation of the operation member for constant speed and high speed tape running, a drive section that is rotationally driven in conjunction with this drive source, and a drive section that is controlled by this drive section to rotate the tape surface. a playback slider that is slid in a substantially parallel direction to control the pinch roller and the head; and a playback slider that is controlled by the driving section and is slid substantially perpendicular to the playback slider to bring the head into contact with the tape surface. A forward/reverse switching device for a tape recorder, comprising a head slider in contact with the head slider, and wherein when the switching operation of the playback slider and head slider is completed, the drive section is locked and recording or playback of the tape is performed. .