KR870000517B1 - Tape recorder apparatus - Google Patents

Abstract

In respones to the forward or reverse rotation force from the assiting motor the shift control mechanism shifts a tape drive mechanism including a head position control mechanism to a position for forward or reverse tape feed. Thus, when a gear is driven aanticlockwise by a reel motor, a friction member is moved anticlockwise. As a result, the gear supported by a projection from the friction member, is caused to engage a gear of the reel holder to rotate it clockwise.

Description

Tape recorder device

1 is a diagram illustrating the configuration of a forward / reverse selector used in a conventional tape recorder.

2 to 22 illustrate the structure and operation of the basic embodiment of the tape recorder of the present invention.

23 to 29 are views for explaining the construction and operation of the second embodiment of the present invention.

30 to 37 are views for explaining the construction and operation of the third embodiment of the present invention.

38 to 44 are views for explaining the construction and operation of the fourth embodiment of the present invention.

45 to 55 are diagrams illustrating specific examples or driving and control units for the head position detection switch used in the basic embodiment.

* Explanation of symbols for main parts of the drawings

40: shift control mechanism 42: motor

47: Playback Slider 48: Head Slider

47B, 47C: Playback slider 51, 52: Pinch roller

48: common head slider 85: logic control circuit

96: Head Position Detection Switch

The present invention relates to an improvement of a tape recorder with a motor drive aid.

In recent years, a tape recorder having a so-called motor drive assistance mechanism has been developed, in which the head slider as the head position control member can be moved to a predetermined position by an external auxiliary motor.

The tape recorder can act as a so-called soft-touch operation and can be combined with an auto-reverse mechanism or other instruments.

This type of tape recorder should be designed so that the slide action of the head can be safely controlled in different modes of operation and the head is placed exactly in the position corresponding to that mode of operation.

However, conventional drive motor aids do not always fully meet these requirements, resulting in several drawbacks. For example, the head position controlled by the headslider cannot be easily detected or adjusted. Therefore, cue (restart) and review (regression) operations, in particular, cannot be performed correctly without difficulty.

It should be understood that the setting of the head position includes establishing an operating mode and shifting the tape recorder from the operating mode to the stop mode. However, in the stop mode, it is necessary to set the head position so that the head slider can be safely restored without difficulty. In addition, it is necessary to prevent the reduction of the effective torque margin of the auxiliary motor for the counter voltage drop.

Forward / reverse selectors for changing the tape feed direction are used as motor drive aids for automatic reverse rotation mechanisms. As shown in FIG. 1, the forward / reverse selector is generally equipped with left and right plungers 11, 12 for forward-reverse shift control. The left and right reproduction sliders 14 and 15 are supported on the main chassis 13 so as to slide in the directions of arrows A and B. As shown in FIG. One end of the left and right transfer levers 16, 17 acts with one end of the left and right playback sliders 14, 15, respectively. The transmission levers 16 and 17 are mounted to be movable on their intermediate portions on the main chassis 13. The other end portions of the transfer levers 16 and 17 are supported by the core portions 111 and 121 of the left and right plungers 11 and 12, respectively.

For example, when the right plunger 12 is actuated, its core portion 121 is pulled so that the right transfer lever 17 moves in the clockwise direction of FIG. At this time, the right regeneration slider 15 which acts on one end of the right transmission lever 17 slides in the direction of arrow A against the sliding force of the restoring spring 18. As the right regeneration slider 15 slides in this manner, the headslide 19 also slides in the direction of arrow A against the sliding force of the restoring spring 20. Subsequently, the recording / playback head 21 mounted on the head slider 19 comes into contact with the tape surface, and the right pinch lever 22 moves simultaneously with the movement of the right playback slider 15. Therefore, the right pinch roller 23 presses the position tape toward the capstan 24 in the forward regeneration operation. On the other hand, when the left plunger 16 is operated, the left reproducing slider 14 is slid in the direction of arrow A by the left transfer lever 16. As the left playback slider 14 slides in this manner, the head slider 19 also slides in the direction of the arrow A. FIG. The recording / reproducing head 21 then contacts the tape along the tape feeding direction. Therefore, the left pinch roller 25 on the left pinch lever 25 presses the tape toward the capstan 27 for the reverse play operation.

In this configuration, the forward / reverse selector used in the motor driving aid for the automatic reverse rotation mechanism is expensive because it requires the use of two plungers, and a high power source is required. Therefore, this forward / reverse selector is unsuitable for small portable tape recorders and its added power consumption increases the operating cost of the device.

Moreover, some of the forward / reverse selectors used in tape recorders are usually associated with the head shift mechanism. As these forward / reverse selectors change the tape feed direction, the head shift mechanism is operated to shift the recording / playback head and other heads according to the tape feed direction. However, when associated with the head shift mechanism, these conventional forward / reverse selectors become complicated in structure and expensive to manufacture.

It is a first object of the present invention to provide a tape recorder with an improved motor assist mechanism in terms of power consumption and cost, particularly for small devices which operate as simply and satisfactorily as possible in construction.

It is a second object of the present invention to provide a tape recorder which enables the motor drive assist mechanism to satisfactorily perform automatic reverse rotation, cue and revie operations.

It is a third object of the present invention to provide an improved tape recorder so that the head position can be safely detected and easily controlled by the motor drive aid.

First, the basic embodiment of the tape recorder of the present invention will be described in detail with reference to FIGS. 2 and 3 are front and rear plan views respectively showing a general configuration of the tape recorder according to the present invention. In FIG. 2, the pair of reel holders 32, 33 are individually rotatably supported on a central portion in front of the substantially rectangular main sash 31. The large gears 34 and 35 are integrally formed on the real holders 32 and 33 so as to be coaxial with each other.

On the rear side of the main sash 31, a tape supply rail motor 36 is provided on a vertical moving segment of the straight line after passing through a straight line connecting the rotary shafts of the rail holders 32,33. The rotation shaft 361 of the rail motor 36 protrudes on the front side of the main sash 31, and the center portion of the gear 37 is fitted on the protruding end portion of the shaft 361. Substantially annular friction agent 38 surrounds gear 37 on the front of main sash 31. The protrusion 381 is integrally formed on the friction member 38 facing between the rail holders 32 and 33. The friction member 38 and the gear 37 are engaged by a suitable friction force. Thus, the friction member 38 is pushed in the direction of arrow C or D depending on the rotational direction of the gear 37. The rotary shaft 182 is rotatably supported on the protrusion 381 of the friction member 38 to engage the gear 39 normally engaged with the gear 37 thereon.

When the gear 37 is rotated counterclockwise by the rail motor 36, the friction member 38 is pushed in the direction of the arrow D. Subsequently, the gear 39 supported by the protrusion 181 acts with the gear 35 of the rail holder 33 to rotate the rail holder 33 counterclockwise. When the gear 37 is rotated clockwise by the rail motor 36, the gear 39 supported by the protrusion 181 acts with the gear 34 of the rail holder 32 to open the rail holder 32. Rotate clockwise. In this way, the tape (not shown) can be supplied in the forward and reverse directions. The real motor 36 is an operating member (not shown) or a high speed tape supply (high speed forward running and rewinding) for a tape supply (recording and forward / reverse playback) of a normal speed at which the rotation motor 36 rotates. It is controlled by a real motor driving circuit (described later) to change in accordance with the operation of an operating member (not shown). When the operating member for normal or high speed tape supply or the operating member for tape stop (including pause) is operated, a logic control circuit (described later) is operated to correspond to the operating motor operated in response to the operated motor. 36) Set the rotation or stop mode.

On the main sash 31, a forward / reverse selector 40 as an automatic reverse rotation mechanism with a motor driving aid is disposed below the rail holders 32 and 33 as in FIG. The disc shaped drive, i.e., the main gear cam 41 (described later) of the forward / reverse selector 40, is rotatably mounted on a rotating shaft 411 placed on the main chassis 31. The teeth 412 are formed on the periphery of the main gear cam 41.

As shown in FIG. 3, an external drive source, such as the auxiliary motor 42, is disposed on the rear side of the main chassis 31. As shown in FIG. The gear 43 is rotatably mounted on the rotation shaft 42a of the auxiliary motor 42, and the reduction gears 44, 45, 46 are subsequently engaged with the gear 43. The small gear 45a attached to the reduction gear 46 farthest from the gear 43 protrudes on the rear surface of the main sash 31 to engage with the teeth 412 of the main gear cam 41. Therefore, when the gear 43 is rotated by the drive motor 42, the rotation of the gear 43 is transmitted to the main gear cam 41 via the reduction gears 44, 45, 46 to rotate it. The rotation direction or the stop (motor fixing) mode of the auxiliary motor 42 is a logic control circuit and an auxiliary motor control circuit in accordance with the operation of the tape feeding operation member at normal speed or the combined operation of the normal speed and high speed tape feeding operating member. And an auxiliary motor drive circuit (described later).

A playback slider 47 that can slide in the direction of arrows E and F (described in detail later) and a head position control member that can slide in the direction of arrows E and F, i.e., the head slider 48, are the main gear cams 41. It is placed one after another on the top of the. When the main gear cam 41 is rotated in the manner described above, the playback slider 47 is selectively slide in the direction of the arrow E or F according to the rotation direction of the main gear cam 41, and consequently the tape in the forward or reverse direction. Is driven and the head slider 48 slides in the direction of the arrow G. FIG. At this time, the left and right pinch levers 49 and 50 (described in detail later), which act individually on both ends of the head slider 48, are selectively moved to be rotatably supported on the pinch levers 49 and 50. Causes left and right pinch rollers 51 and 52 to act with left and right capstans 53 and 54 through the tape medium. The recording / playback head 55 mounted on the head slider 48 also comes into contact with a specific surface of the tape to set the forward or reverse playback (recording) mode. The recording / reproducing head 55 is moved as a tape path so as to contact in a correct orientation with respect to the corresponding track of the tape, so as to perform the reproduction (recording) operation in the forward and reverse supply directions.

The head rotating mechanism 56 used for this purpose will be described later. The left and right capstans 53 and 54 are used as the respective axes of rotation of the left and right flywheels 57 and 58 shown in FIG. 3 and are shown in FIG. 3 on the back side of the main sash 31 without blacklash. As shown, the main motor 59 is disposed to the right of the left and right capstans 53 and 54. The pulley 60 is mounted on the axis of rotation of the main motor 59. The belt 61 extends between the pulley 60 and the left and right flywheels 57, 58. In this way, the rotation of the main motor 59 is transmitted to the flywheels 57 and 58 by the belt 61 and is normally transmitted to the flywheels 57 and 58 so that the flywheels 57 and 58 are normally rotated clockwise or half in FIG. Rotate clockwise.

On the back side of the main sash 31, an ejector member 62 is supported at the left side so as to slide in the directions of arrows I and J in FIG. The ejector member 62 is substantially in the shape of a rod extending from the upper end to the lower end of the main chassis 31. The sliding portion 311 formed on the main sash 31 is fitted into the through groove 612 at one end of the ejector member 62, while the shaft 312 formed on the main sash 31 is the ejector ( It fits loosely into the through groove 622 at the other end of 62. The ejector member 62 is then pressed down by the pressing ring 313 to be slidably supported. The ejector member 62 is also in the direction of arrow J by a spring 63 extending between the bent retaining strip 523 at the center of the ejector member 62 and the shaft 314 formed on the main sash 31. I'm pushed.

The fixing part 624 is formed at one end of the ejector member 62. When the cassette lid (not shown) which is normally opened is closed, a portion of the cassette lid is fixed to be kept closed by the fixing portion 624. When the ejection operation member (not shown) is operated, the ejector member 62 is slid by the ejector slider 64 in the direction of arrow I against the pressing force of the spring. Accordingly, the fixing part 624 of the ejector member 62 is released from the cassette cover so that the cover moves and opens.

In addition, on the main chassis 31, an erasure prevention mechanism 68 is provided in the upper portion of FIG. 2, which has a cassette detecting switch 65 and forward and reverse erasing prevention switches 66,67.

The forward / reverse selector 40 with motor drive aid will now be described. On the main sash 31, the rotatable main gear cam 41 is engaged with the small gear 46a of the reduction gear 46 as shown in FIGS. 4, 5 and 6 degrees. On the lower surface of the main gear cam 41, a curved projection 416 is formed on the top of the rotation shaft 411 as shown in FIG. A pair of restoring members, for example restoring levers 68, 70, face each other with projections 416 therebetween. The restoring levers 69 and 70 are rotatably supported at one end by moving the axes 691 and 701 which are placed on the main chassis 31, respectively. The curved portions 692 and 702 are formed in the middle of the restoring levers 69 and 70 facing the protrusions 416, respectively. In addition, the retaining levers 69 and 70 are provided with holding portions 693 and 703, respectively, which are adjacent to the curved portions 692 and 702 at points facing the rotary shafts 411 of the two gear cams 41. The holding portions 692 and 703 face each other with the holding portions 315 on the main sash 31 therebetween. Hook portions 694 and 704 are formed at the other ends of the restoring levers 69 and 70, respectively. The restoring spring 71 extends between the hook portions 694 and 704. The operation of the restoration mechanism thus constructed will be described later.

The protrusion 413 protrudes downward (FIG. 6) from the rotating shaft 411 on the upper surface of the main gear cam 41. As shown in FIG. The convex portion 414 is formed at the center of the protrusion 413.

A playback slider 47 having a substantially T-shaped upside down is disposed on the upper surface of the main gear cam 41 so as to slide in the directions of the arrows E and F. As shown in FIG. The curved through groove 471 is formed at the central end of the regeneration slider 47. The gain part 472 is formed at one end of the through hole 471. The protrusion 413 of the main gear cam 41 is fitted into the through groove so that the protruding end portion 415 of the protrusion 413 faces the gain portion 472 of the through groove 471.

A substantially T-shaped through hole 473 is formed at one end of the reproducing slider 47. A sliding portion 316 having a substantially T-shaped side surface and placed in the main sash 31 is fitted into the through hole 473. The through hole 474 is formed at the other end of the reproduction slider 47. The shaft 317 lying in the main sash 31 is loosely fitted in the through hole 474 and pressed down with the screw 318. The extension 475 protrudes from the center end of the playback slider 47 to the right in FIG. 5. The axis 319 (see FIG. 2) lying on the main sash 31 passes through the through hole 476 formed in the extension 475. In this way, the playback slider 47 is supported so as to slide in the directions of the arrows E and F.

The grooved portion 477 is formed substantially in the center of the lower edge portion of the regeneration slider 47 and the fitting portion 478 is cut in the grooved portion 477. A portion of the head rotating mechanism 56 (described later) is intended to act with the pinch portion 478.

The bent parts 73 and 72 are formed at each end of the reproducing slider 47, respectively. The bent portions 72 and 73 are provided with holding portions 721 and 731, respectively. The holding portion 721 or 731 is a curved portion 491 of each corresponding left and right pinch levers 49 and 50 (described later in detail) as the playback slider 47 slides in the direction of the arrow E or F. ) Or (501).

A substantially inverted T-shaped head slider 48 is disposed on the upper surface of the playback slider so as to slide in the directions of arrows G and H. As shown in FIG. The recess 481 is formed at the end of the center end of the head slider 48. The axis 482 lying in the main sash 31 between the axes 691 and 701 passes through the recess 481 so that the head slider 48 is guided while sliding in the arrows G and H directions. The head slider 48 is capable of sliding in the direction of arrow G until the bottom portion of the recess 481 contacts the axis 482.

The through hole 483 is formed at the central end of the head slider 48 so as to correspond to the rotation shaft 411 of the main gear cam 41. A rectangular locking hole 484 is formed at the lower end of the through hole 483 as in FIG. 5 to correspond to the moving trajectory of the convex portion 41 of the main gear cam 41. The convex portion 414 of the rotation shaft 411 and the main gear cam 41 pass through the hole 483 and the lock hole 484, respectively.

In this way, as the main gear cam 41 rotates, the protruding end portion 415 of the protruding portion 413 of the main gear cam 41 slides the playback slide to a fixed position. Then, when the main gear cam 41 rotates again so that its convex portion 41 engages with a part of the lockhole 484, the head slider 48 is placed in its predetermined position.

The head slider 48 is also provided with bent holding parts 485 and 486 which are also bent at substantially right angles and are arranged at the corners of both ends of the head slider 48. The left and right pinch rollers 51 and 52 are rotatably supported by one end of the left and right pinch levers 49 and 50, respectively, having a substantially U-shape. The other end portions of the pinch levers 49 and 50 are movably mounted to the lock shafts 492 and 502 placed in the main sash 31, respectively. In addition, the projections 493 and 503 are formed at the other end portions of the pinch levers 49 and 50, respectively, to correspond to the bent portion of the regeneration slider 47. The torsion springs 74 and 75 formed on the bent portions 491 and 501 are respectively wound around the lock shafts 492 and 502 of the pinch levers 49 and 50, respectively. One end of the torsion springs 74 and 675 acts on the back of the pinch levers 49 and 50, respectively. The other ends of the torsion springs 74 and 75 respectively act with the bent holding portions 485 and 486 of the head slider 48. As the head slider 48 slides in the direction of arrow G, the left and right pinch levers 49 and 50 move counterclockwise and clockwise, respectively, in FIG. At the same time, the bent portions 491 or 501 of the projections 493 or 503 in either the pinch lever 49 or 50 correspond as the playback slider 47 slides in the direction of the arrow E or F. The bent holding part 721 or 731 can be selectively prevented from moving. The other of the pinch levers 49 and 50 moves its corresponding pinch roller 51 or 52 in contact with the corresponding left or right capstan 53 or 54.

In addition, the head slider 48 has a holding portion 487 at one end corresponding to the axis 317 of the main sash 31 and a holding portion 488 at the other end corresponding to the sliding portion 316 of the main sash 31. Has In this way, the head slider 48 can slide in the direction of arrow H until the holding portions 487 and 488 come into contact with the shaft 317 and the sliding portion 316 of the main sash 31, respectively. The head slider 48 is then pushed in the direction of arrow H by a spring 76 extending between the holding strip 489 at the other end of the head slider 48 and the sliding portion 316 of the main sash 31. .

The head mounting structure 77 of the head rotating mechanism 56 is attached to the center portion of the head slider 48 substantially with a screw 771. The head mounting structure 77 integrally supports the head support plate 78 and the gear 79 and rotatably supports the base portion of the fan gear 80 meshed with the gear 79. The cylindrical head support 81 is attached to the head support plate 78. The recording / playback head 55 and the holding head 82 for a cassette tape recorder are arranged side by side on the head support portion 81.

As the head mounting structure 77 is attached to the head slider 48, the contact surfaces of the recording / reproducing head 55 and the holding head 82 face the real holders 32 and 33. As shown in FIG. The drive unit 801 extends from the base portion of the fan gear 80. The bent end of the drive unit 801 is fitted to the fitting portion 478 of the regeneration slider 47. Even if the head slider 48 slides in the arrow G or H direction, the driving unit 801 is always fitted to the fitting portion 478 without exiting. In this way, during the switch in the tape feeding direction, the fan gear 80 is moved around its base portion as the regeneration slider 47 slides in the direction of the arrow E or F. As shown in FIG.

If the fan gear 80 moves in the counterclockwise direction in FIG. 4, the gear 79 meshes with the fan gear 80 and rotates clockwise. As the gear 79 rotates in this manner, the head support plate 78 and the head support 81 rotate in the same direction. The recording / reproducing head 55 and the erasing head 82 are then rotated by exactly 180 degrees. In this way, a track change (head shift) is achieved at the time of switching of the tape feed direction.

On the other hand, when the fan gear 80 moves clockwise, the gear 79, the head support plate 78 and the support portion 81 are rotated counterclockwise to return the heads 55 and 82 to their original positions. do.

A pair of holding portions (not shown) are formed on the head support plate 78. Corresponding to these holding portions, a pair of screws 772 and 773 are attached to the head mounting structure 77. The head support plate 78 is rotatable until one of its holding portions contacts the corresponding screw 772 or 773 of the head mounting structure 77. Accordingly, the orientation adjustment of the recording / reproducing head 55 and the erasing head 82 can be achieved by adjusting the fitting depths of the screws 772 and 773. The heads 55 and 82 are connected to electrical circuits (not shown) of the recording / reproducing system by connecting lines (not shown).

A pair of arrows for indicating the tape feeding direction are indicated on the peripheral surface of the head support portion 81, and a tape guide portion 83 for supporting both edge portions of the tape is formed at one portion of the head support portion 81. do.

Torsion spring 84 is wound around a portion of head mounting structure 77. One end of the torsion spring 84 is held by the central portion of the gear 79, while the other end is received by the base portion of the fan gear 80. In this way the head support 78 remains stable in two positions with respect to the forward / reverse tape feed mode because of the sliding force of the torsion spring 84.

The operation of the forward / reverse selector 40 as an automatic reverse rotation mechanism with motor drive aid and restoring mechanism will now be described in detail. First, in the stop mode shown in FIG. 5, the operation member for tape feeding (forward regeneration) at a normal speed is operated in the manner described above to rotate the main gear cam 41 clockwise. As the main gear cam 41 rotates in this manner, the protruding end portion 415 of the protruding portion 413 acts with the right portion of the gain portion 472 of the reproducing slider 47 to move the slider 47 in the direction of the arrow E. Slide) farthest. As the playback slider 47 slides in this manner, the recording / reproducing head 55 and the erasing head 82 are rotated in accordance with the tape feeding direction by the head rotating mechanism 56.

The block portion 414 of the protrusion 413 of the main gear cam 41 then acts on the right side of the lockhole 404 of the head slider 48 (in FIG. 7). As the main gear cam 41 further rotates, the protruding end portion 415 of the protrusion 413 comes into sliding contact with the curved edge of the through hole 471 as shown in FIG. This does not cause the playback slider 47 to be swept in the direction of arrow E, but the head slider 48 is swept in the direction of the arrow G by the block portion 414 of the protrusion 413 and slides to its predetermined position. do. At this time, the left and right pinch levers 49 and 50 which act on the bent holding portions 485 and 486 of the head slider 48 through the medium of the torsion springs 74 and 75 are pushed clockwise and counterclockwise, respectively. Since the reproduction slider 47 is furthest in the direction of the arrow E, the left pinch lever 49 is caught by the holding portion 721 at one end of the reproduction slider 47 to prevent movement. On the other hand, the right pinch lever 50 moves in the clockwise direction without being caught by the holding portion 731 at the other end of the reproduction slider 47. In this way, the right pinch roller 52 comes into contact with the right capstan 54 in the manner described above. Then, the current supplied to the drive motor 42 to rotate the main gear cam 41 is minimized to provide the motor fixed state, and the forward regeneration operation is performed.

As the main gear cam 41 rotates counterclockwise as in FIG. 9, the end portion by the projection 416 is curved portion 692 of the left restoring lever 69 of the restoring mechanism on the lower surface of the main gear cam 41. FIG. ). As the main gear cam 41 again rotates counterclockwise, the restoring lever 69 moves clockwise around the lock shaft 691 against the sliding force of the restoring spring 71. On the other hand, the right restoring lever 70 is prevented from being caught by the holding protrusion 315 of the main sash 31 and moving in the clockwise direction. At the end of the rotation of the recording / reproducing head 55 and the erasing head 82, that is, at the beginning of the sliding of the head slider 48 as shown in FIG. 10, the projection 416 of the cam 41 is restored. It is moved along the curved portion 692 of the lever 69 to move the restored lever 69 clockwise as the main gear cam rotates. One end of the projection 416 is placed at one end of the curved portion 692 of the return lever 69 by the rotation of the main gear cam 41 as shown in FIG. Subsequently, as shown in FIG. 12, the center portion of the projection 416 of the main gear cam 41 at the position where the sliding of the head slider 48 ends is terminated with one end of the curved portion 692 of the restoring lever 69. Contact. At this time, the restoring lever 69 is pushed in the direction of the arrow K by the restoring spring 71 held at one end thereof.

It is assumed that the tape end is reached in the forward regeneration mode and detected by the tape end detector (not shown) or the operating member for the stop mode is operated and the auxiliary motor 42 is cut off from the current supply. Subsequently, the head slider 48 is tracked again in the direction of the arrow H by the sliding force of the restoring spring 71 as shown in FIG. As the head slider 48 is tracked again, it is rotated clockwise by the sliding force of the restoring spring 71 to retrack the head slider 48 to the slide start position as shown in FIG. On the other hand, the head slider 48 is tracked again. On the other hand, the left and right pinch levers 49 and 50 acting separately from the bent holding portions 485 and 486 of the head slider 48 are moved clockwise and counterclockwise, respectively, so that the left and right capstans 53 and 54 respectively. Freed from

Thereafter, the main gear cam 41 placed in the aforementioned position is returned to the stop position by the sliding force of the restoring spring 71 of the restoring mechanism. In other words, the main gear cam 41 is rotated clockwise to be in the stop position shown in FIG. 16, so that the left restoring lever 69 is driven by the sliding force of the restoring spring 71 as shown in FIG. The protrusion 416 is moved in contact with the curved portion 692 of. As the main gear cam 41 rotates in the clockwise direction, the playback slider 47 which has been pushed in the direction of the arrow E by the protruding end portion 415 of the protrusion 413 of the main gear cam 41 is indicated by the arrow E. Slider in the direction to restore the rest position.

When the stop position is reached in this manner, if the reverse signal is given to the auxiliary motor 42 and the automatic reverse mode is set, the auxiliary motor is rotated backward. As a result, the main gear cam 41 reverses clockwise, and the forward / reverse selector 40 is operated to set the reverse regeneration mode. As the main gear cam 41 rotates clockwise as shown in FIGS. 17 and 18 degrees, the protruding end 415 of its protrusion 413 is the left portion of the gain 472 of the reproduction slider 47. And the reproduction slider 47 slides in the direction of the arrow F. As shown in FIG. As the playback slider 47 slides in this manner, the recording / playback head 55 is rotated by the head rotating mechanism 56 in accordance with the tape feeding direction. At the same time, the convex portion 414 of the protrusion 413 of the main gear cam 41 acts on the left side of the lock hole 484 of the head slider 48. When the main gear cam 41 rotates again as shown in FIG. 19, the protruding end portion of the protruding portion 413 is brought into sliding contact with the curved edge of the through hole 471. As a result, the reproduction slider 47 does not move in the arrow F direction, but the head slider 48 is pushed in the arrow G direction by the convex portion 414 of the protrusion 413 and slides to its predetermined position. Subsequently, the left and right pinch levers 49 and 50 acting with the holding portions 485 and 486 bent through the medium of the torsion springs 74 and 75 are pushed counterclockwise and clockwise, respectively. Since the playback slider 47 is farthest in the direction of the arrow G, the right pinch lever 50 is caught by the holding part 731 at the other end of the playback slider 47 to prevent movement. On the other hand, the left pinch roller 51 comes into contact with the left capstan 53 in the manner described above. Subsequently, the current supply to the auxiliary motor 42 is minimized in the manner as mentioned above to provide the motor fixed state so that the reverse regeneration operation is performed.

As the main gear cam 41 rotates clockwise as illustrated, the other end of the projection 416 contacts the bend 702 of the right return lever of the restoring member on the bottom surface of the main gear cam 41. . The restoring lever 70 then moves counterclockwise around the lock axis 701 against the sliding force of the restoring spring 71. On the other hand, the left restoring lever 69 is caught by the holding portion 315 of the main sash 31 to prevent movement in the counterclockwise direction. As the main gear cam 41 rotates again, the right recovery lever 70 is moved counterclockwise again by the protrusion 416. In the reverse regeneration mode in which the sliding of the head slider 48 is completed, substantially the center portion of the protrusion of the main gear cam 61 acts with one end of the curved portion 702 of the restoring lever 70.

Now, a circuit for controlling a tape recorder equipped with a motor driving aid will be described. As shown in Figs. 20 and 21, the logic control circuit 85 has a power supply terminal Vcc connected to the power source + B and its ground terminal GND grounded. Forward Play Input Terminal (F-PLAY), Reverse Play Input Terminal (R-PLAY), Record Input Terminal (REC), Fast Forward Input Terminal (FF), Rewind Input Terminal (REW), Stop Input Terminal (STOP) and Pause Input terminal PAUSE is connected to one end of switches 86, 87, 88, 89, 90, 91, and 92, respectively, and all other ends of the switch are grounded. . When the switches 86 to 92 are operated, the input terminals R-PLAY, REC, REW, FF, STOP and PAUSE of the logic control circuit 85 corresponding to the switches 86 to 92 are at ground level or It becomes low level (hereafter called L level). As a result, the forward playback output terminal (REW-out), reverse playback output terminal (R-out), recording output terminal (REC-out), rewind output terminal (REW-out), and high speed forward output terminal corresponding to each input terminal. (FF-out) and pause output terminal (PAUSE-out) are at a high level (hereafter referred to as H level). The auxiliary motor 42, the real motor 36 and the main motor 59 are controlled in accordance with the output signal during the start and stop of the tape feed.

The auxiliary motor 42 is connected between the junction points of the transistors Q1, Q2, Q3, and Q4 which are bridged. Of these transistors Q1, Q2, Q3, and Q4, the lower transistors Q1 and Q2 have their bases, respectively, passing through diodes D1 and D2 and resistors R1 and R2, respectively, with a forward regenerative output terminal (F-out) and a reverse regenerative output terminal (R-). out). The upper transistors Q3 and Q4 are each connected to a power source (+ B) via transistor Q5, whose jay is connected to the collector of the other via resistors R3 and R4 and the emitter is designed to control the supply of current to the auxiliary motor 42. Connected. The base of transistor Q5 is connected to the collector of transistor Qc via zener diode D3 and control diode D3 is connected to power supply (+ B) via resistor R5.

The high speed forward output terminal FF-out and the rewind output terminal REW-out of the logic control circuit 85 are connected to one input terminal of the NAND circuits N1 and N2, respectively. The other input terminals of the NAND circuits N1 and N2 are commonly connected to the output terminal of the NAND circuit N3 connected to the selector switch 93 (described later). The output terminals of the NAND circuits N1 and N2 are connected to the input terminals of the NAND circuits N4 and N5, respectively, to supply the forward or reverse rotation signal to the auxiliary motor 42, and at the same time, to the one input terminal and the other input terminal of the NAND circuit N6, respectively. do. The output terminals of the NAND circuits N4 and N5 are connected to the connection terminals 94 and 95 of the auxiliary motor driving circuit, respectively, so that the auxiliary motor 42 rotates in the forward and reverse directions according to the operations of the switches 86 and 87. .

The output terminal of the NAND circuit N6 is connected to one input terminal of the NAND circuit N7, and the other input terminal of the NAND circuit is connected to the head position detection switch 96 through the resistor R7. The output terminal of the NAND circuit N7 is connected to one input terminal of the NAND circuit N8. The output source of NAND circuit N9, whose input terminal is commonly connected to the output terminal of NAND circuit N6, is connected to one input terminal of NAND circuit N10 through capacitor C1 and resistor R8 connected to one terminal of power supply (+9). The other input terminal of the NAND circuit 10 is connected across the other input terminal of the NAND circuit N8, and the output terminal of the NAND circuit N10 is connected to the NAND circuit N11 via the capacitor C2 to extract the current control signal. The output terminal of the NAND circuit N11 is connected to the connection terminal of the auxiliary motor driving circuit.

Similarly to the auxiliary motor 42, the real motor 36 is connected between the junction contacts of the transistors Q7, Q8, Q9 and Q10 having a bridging connection. Of these transistors Q7, Q8, Q9 and Q10, the lower transistors Q7 and Q8 are respectively reverse to the forward regenerative output terminal (F-out) of the logic control circuit 85 whose base passes through diodes D5 and D6 and resistors R9 and R10. It is connected to the regenerative output terminal R-out. The upper transistors Q9 and Q10 each have their base connected via resistors R11 and R12 to the collector of the other and its emitter is a power supply (+ B) past transistor Q11 which is designed to control the supply of current to the real motor 36. ) Is connected. The base of the transistor Q12 is connected to the collector of the transistor Q12 via the zener diode D7 and the zener diode D7 is connected to the power supply (+ D) through the resistor R13. The jay of transistor Q12 is connected to diode D8 and resistor R14, diode D9 and resistor R15, respectively, to forward regeneration output terminal F-out and reverse regeneration output terminal R-out of logic control circuit 85.

One terminal of the main motor 59 is grounded and the other terminal is connected to the collector of transistor Q13. The emitter of transistor Q3 is connected to the power supply (+ B) and the base is connected to the collector of transistor Q12 via resistor R16.

When the power switch (not shown) is operated for forward regeneration, the signal output terminal T-out of the logic control circuit 85 becomes H level. As shown in FIG. 22, when the switch 86 operates at time T1, the signal output terminal T-out of the logic control circuit 85 becomes low level, and the transistor Q6 is turned off, and the forward regeneration output terminal ( Transistor Q1 is turned on. As a result, the auxiliary motor 42 is supplied with sufficient current to drive the motor in a specific direction for a given period (up to time T2) and rotate in the forward direction. Subsequently, the main gear cam 41 is rotated in the manner described above for the forward tape feed to actuate the forward / reverse selector 40. Simultaneously with the switching operation of the forward / reverse selector 40, the head rotating mechanism 56 is operated such that the recording / reproducing head 55 contacts the tape surface according to the tape feeding direction, and the right pinch lever 50 is rotated to the right pinch roller. 52 is moved to hold the tape with respect to the right capstan 54. At this time, the signal output terminal T-out of the logic control circuit 85 is at a high level to turn on the transistor Q6. Accordingly, the auxiliary motor 42 is fixed by receiving a predetermined small current. In this state, the forward regeneration operation is performed.

The real motor 36 is driven when the transistors Q7 and Q12 are turned on at the time T2 at which the auxiliary motor 42 is fixed. The real motor 36 is then rotated at a speed and direction corresponding to a normal speed forward tape feed. In this way, the gear 39 acts with the gear 35 of the real holder 33 in the manner described above for the normal speed forward tape feed.

The main motor 59 is driven when the transistor Q13 is turned on at the time T1 when the forward regeneration switch is operated. As mentioned above, the rotation of the main motor 59 is transmitted to the left and right capstans 53 and 54 past the left and right flywheels 57 and 58, respectively.

When switch 77 is operated at time T1 for reverse regeneration with the power switch on (or tape termination is detected by the tape termination detector for automatic reverse rotation operation), the logic control circuit 85 The signal output terminal T-out is at a low level to turn off the transistor Q6, and the reverse regeneration output terminal R-out is at a high level to turn on the transistor Q2. As a result, the auxiliary motor 42 is supplied with sufficient current to drive the motor 42 in a specific direction for a given period (up to time T2), and is rotated in the reverse direction. Subsequently, the main gear cam 41 is rotated in the manner described above to activate the forward / reverse selector 40 for forward tape feed. Simultaneously with the switching operation of the selector 40, the head rotating mechanism 56 causes the recording / reproducing head 55 to contact the tape surface according to the tape feeding direction, and the left pinch lever 49 is the left pinch roller 51. Is moved to hold the tape with respect to the left capstan 53. At this time, the signal output terminal T-out of the logic control circuit 85 is at a high level as in the previous operation for forward regeneration to turn on the transistor Q6. Accordingly, the auxiliary motor 42 is fixed by receiving a predetermined small current. In this state, the reverse regeneration operation is performed.

The real motor 36 is driven when the transistors Q12 and Q8 are turned on at the time T2 at which the auxiliary motor 42 is fixed. The real motor then rotates at a speed and direction corresponding to a reverse tape feed at a normal speed. In this way, the gear 39 acts on the gear 34 of the real holder 32 in the above-described manner for feeding the reverse tape at the normal speed.

As in the forward regeneration operation, the main motor 59 is driven when the transistor Q13 is turned on at the time T1 at which the switch 87 is operated.

When the switch 69 is operated for a high speed forward tape supply, the real motor 36 is connected to the high speed forward output terminal FF-out of the logic control circuit 85 by a high speed forward circuit (not shown). Rotate at the speed and direction corresponding to the tape feed. In this way, the high speed forward tape supply is stably performed.

When the switch 90 is operated for rewinding, the real motor 36 has a speed corresponding to the rewind mode by a rewind circuit (not shown) connected to the rewind output terminal REW-out of the logic control circuit 85. Is rotated in the direction. In this way, the tape winding is performed stably.

When the switches 86 and 89 are operated together for high speed forward regeneration (queue), the selector switch 93 is turned on so that the output terminal of the NAND circuit N3 and the high speed forward output terminal of the logic control circuit 85 (FF-). out) to a high level. Accordingly, the output terminal of the NAND circuit N4 becomes high level, turning on the transistor Q1 of the auxiliary motor driving circuit and turning off the transistor Q6 as described above. As a result, the auxiliary motor 42 is supplied with sufficient current to operate the motor 42 in a specific direction and rotates in the forward direction. Subsequently, the main gear cam 41 is rotated to operate the forward / reverse selector 40 for forward tape supply to rotate the recording / playback head 55 in accordance with the tape supply direction. The head slider 48 then slides in the manner described above to bring the recording / playback head 55 into smooth contact with the tape surface, and the head position detection switch 96 has a right pinch roller 52 with a right capstan 54 Is turned off before contacting Subsequently, the output terminal of the NAND circuit N11 is brought to a high level by the NAND circuits N6, N7, N8, N9, and N10, and the transistor Q6 of the auxiliary motor driving circuit is turned on. Accordingly, the auxiliary motor 42 is fixed by receiving a small current. In this state, a fast forward playback (cue) operation is performed.

When the switches 87 and 90 are operated together for rewind regeneration, the selector switch 93 is turned on so that the output terminal of the NAND circuit N3 and the rewind output terminal REW-out of the logic control circuit 85 are turned on. Becomes high level. As a result, the output terminal of the NAND circuit N5 becomes high level, turning on the transistor Q2 of the auxiliary motor driving circuit and turning off the transistor A6 as described above. As a result, the auxiliary motor 42 is rotated in the reverse direction by receiving a sufficient current to operate the motor 42 in a specific direction. The main gear cam 41 is then rotated to actuate the forward / reverse selector 40 for the reverse tape feed to rotate the recording / playback head 55 along the tape feed direction. Then, as in the case of the high speed forward reproducing operation, the head slider 48 slides the recording / reproducing head 55 to make smooth contact with the tape surface and before the left pinch roller 51 contacts the left capstan 53. The head position detection speech is turned off. Subsequently, the output terminals of the NAND circuit N11 are brought to a high level by the NAND circuits N6, N7, N8, N8, N9, and N10, and the transistor Q6 of the auxiliary motor driving circuit is turned on. Accordingly, the auxiliary motor 42 is fixed by receiving a small current. In this state, a rewind regeneration operation is performed.

23 and 24 illustrate another embodiment of the present invention. In this second embodiment, as the main gear cam 41 is rotated in the same manner as used in the previous basic embodiment, the main gear cam 41 protrudes downward from the rotation shaft 411 on the upper surface. Has 406. The pair of upward block portions 417 and 418 are formed in the middle portion of the protrusion 406. The protruding portion 406 of the main gear cam 41 has a curved through hole 471 of the regeneration slider 47 so that the protruding stop portion 419 of the protruding portion 406 faces the individual portion 472 of the through hole 471. ) Is inserted.

Instead of the through hole 483 and the lock hole 484, a substantially rectangular lock hole 4810 is formed in the head slider 48 disposed on the top surface of the regeneration slider 47 as used in the previous basic embodiment. . The protrusion 4811 is formed substantially at the center of the upper edge of the lockhole 4810. The inclined portions 4812 and 4013 are formed separately on both sides of the projections 4811 corresponding to the block portions 417 and 418 of the main gear cam 41, respectively.

If operation division (not shown) for normal speed tape feeding is operated for forward regeneration, the main gear cam 41 is rotated counterclockwise in FIG. 25 as in the above embodiment. Subsequently, at the start of rotation of the main gear cam 41, the protruding stop 419 of the protruding portion 406 acts on the right side of the gain portion 472 of the reproducing slider 47, as shown in FIG. Slide farthest in the direction of arrow E. As the playback slider 47 slides in this manner, a head rotating mechanism 56 similar to that described in connection with the basic embodiment above is operated to rotate the recording / reproducing head 55 along the tape feeding direction. Furthermore, in the starting step of rotation of the main gear cam 41, the head slider 48 moves together with the right block portion 418 of the main gear cam 41 in sliding contact with the right inclined portion 4013. In this way, the head slider 48 slides only a short distance in the direction of the arrow corresponding to the sliding force of the spring 76, which corresponds to the rotational angle of the main gear cam 41. Thereafter, the slide distance of the head slider 48 increases as the rotation angle of the main gear cam 41 increases. In this way, the head slider 48 slides to a predetermined position against the sliding force of the spring 76 as shown in FIG. The record / playback head 55 then comes into contact with the tape surface as set in relation to the basic embodiment, and the right pinch lever 50 causes the right pinch roller 52 to press the tape against the right capstan 54. Will move. In this way, as in the basic embodiment, the auxiliary motor 42 is fixed by receiving a small current to perform the forward regeneration operation.

When the tape feed stop operation member (not shown) is operated in the middle of the forward regeneration operation to interrupt the supply of current to the auxiliary motor 42, the head slider 48 is lifted by the spring 76 as shown in FIG. It is tracked again in the direction of arrow H by the pushing force. As the head slider 48 again tracks in this manner, the block portion 418 of the main gear cam 41 is pressed so that the main gear cam 41 rotates clockwise. In this way, the head slider 48 and the playback slider 47 are safely restored to their respective stop positions.

When the operating member for tape supply (not shown) at the normal speed is operated for reverse playback, the main gear cam 41 is rotated clockwise as in the case of the basic embodiment. Subsequently, at the start of rotation of the main gear cam 41, the protruding end portion 419 of the protruding portion 406 acts with the left portion of the gain portion 472 of the reproducing slider 47, as shown in FIGS. 27 and 28 degrees. To slide the slider 47 farthest in the arrow F direction. As the playback slider 47 slides in this manner, the head rotating mechanism 456 rotates the recording / playback head 55 in accordance with the tape feeding direction. Furthermore, at the start of rotation of the main gear cam 41, the head slider 48 moves with the left block portion 417 of the main gear cam 41 in sliding contact with the left inclined portion 4812. The head slider 48 thus slides only a short distance in the direction of the arrow G against the sliding force of the spring 76, which corresponds to the rotational angle of the main gear cam 41. Thereafter, the slide distance of the head slider 48 increases with increasing rotation angle of the main gear cam 41. In this way, the head slider 48 slides to a predetermined position in response to the sliding force of the spring 76 as shown in FIG. At this time, as described in connection with the basic embodiment, the recording / playback head 55 is brought into contact with the tape surface, and the left pinch lever 49 allows the left pinch roller 51 to press the tape against the left capstan 53. Will move. In this way, as in the case of the basic embodiment, the auxiliary motor 42 is fixed by receiving a small current to perform reverse regeneration.

It should be understood from the above description of the forward and reverse playback operations that the fast forward and rewind playback operations (cue and revie) can also be safely performed in the same manner as in the above-described basic implementation.

The head rotating mechanism used in the basic embodiment and the second embodiment may use a fixed head instead.

The present invention may also be configured as another embodiment as follows. 30 is a front plan view of the tape recorder according to the third embodiment showing a general configuration of the forward / reverse selector similar to the basic embodiment. FIG. 31 is an exploded perspective view showing components of the forward selector, and FIG. 32 is a plan view showing the rear side of the main sash 31. In FIG. 30, a pair of reil holders 32, 33 constructed as described in connection with the basic embodiment are rotatably supported on the main chassis 31. As shown in FIG. As described in connection with the basic embodiment, the rail holders 32 and 33 are rotated by a rail motor (not shown) on the back of the main chassis 31 past the medium of the gear (not shown) for forward and reverse tape feeding. do. As described in connection with the basic embodiment, the rotational speed and direction of the real motor may be controlled by an operation member (not shown) or a high speed tape supply (high speed driving and rewinding) for normal speed tape supply (recording and forward / reverse playback). It is controlled by the real motor driving circuit in accordance with the operation of the operation member (not shown). When the operating member for normal or high speed tape feeding or the operating member for stopping (including pose) is operated, the rotation or stop mode of the real motor 36 is set by a logic control circuit similar to that used in the basic embodiment. Can be.

Now, the forward / reverse selector used in the motor drive aid has substantially the same effect as the basic embodiment. The disc drive type, for example, the main gear cam 41A is rotatably mounted on the rotation shaft A1 placed on the main sash 31. The toothed portion A2 is formed on the periphery of the main gear cam 41A, and the pair of block portions A3 and A4 are formed on the upper surface of the main gear cam 41A.

As shown in FIG. 32, the main gear cam 41A and the reduction gears 44, 45, 46 are continuously engaged with the gear 43 rotatably mounted on the rotation shaft 42a of the auxiliary motor 42. Interlocked. In this way, the main gear cam 41A is rotated as the auxiliary motor 42 rotates.

The rotation direction or the stop (motor fixing) mode of the auxiliary motor 42 is a logic control circuit and an auxiliary motor according to the operation of the operation member for supplying the tape at normal speed or the operation of the operation member for supplying the tape at normal and high speed. It is controlled by the control circuit and the auxiliary motor driving circuit.

The left and right reproducing sliders of substantially L shape inverted are arranged side by side on the upper surface of the main gear cam 41A. Gain portions B1 and CL are formed on one portion of left and right reproduction sliders 47B and 47C, respectively. Since the pair of block portions B1 and C1 of the main gear cam 41A face the gain portions B1 and C1, respectively, the left or right reproduction slider 47B or 47C is the main gear cam. It is pushed by the arrow G direction according to the rotation direction of 41A.

The holding portions B2 and C2 are formed near the gain portions B1 and C1 on the left and right reproduction sliders 47B and 47C, respectively. The holding portions B2 and C2 are inserted into the pair of sliding holes F6 and F7 formed in the head slider 48F to be mentioned later. The shafts 318 and 319 lying in the main sash 31 are inserted into the through holes B3 and C3, respectively. In this way, the left and right reproduction sliders 47B and 47C are supported to slide in the directions of the arrows G and H.

Holding portions B4 and C4 are formed at one end of the left and right reproducing sliders 47B and 47C facing the holding shafts 316 and 317 placed on the main sash 31, respectively. In this way, the left and right playback sliders 47B and 47C are tracked again to the positions defined in the direction of the arrow H, and the holding portions B4 and C4 of the playback sliders 47B and 47C are held by the holding shaft 316. ) And 317 to prevent the playback sliders 47B and 47C from being tracked again.

The curved holding portions B5 and C5 are formed near the holding portions B4 and C4 on the left and right reproduction sliders 47B and 47C, respectively. Further, the bent hook portions B6 and C6 are formed at the other ends of the reproducing sliders 47B and 47C, respectively. Since the torsion springs 47D and 47E work with the hook portions B6 and C6, respectively, the left and right regeneration sliders 47B and 47C are left in the direction of the arrow H.

The left and right pinch rollers 51 and 52 are disposed on the curved holding portions B5 and C5 of the left and right reproduction sliders 47B and 47C, respectively. The left and right pinch rollers 51, 52 are rotatably mounted on one end of the left and right pinch levers 49, 50, which are each substantially V-shaped. The other end portions of the left and right pinch levers 49 and 50 are rotatably mounted on the lock shafts 492 and 502 respectively placed on the main chassis 31. Torsion springs 74 and 75 are wound around lock sides D1 and E1 of left and right pinch levers 49 and 50, respectively. One end of the torsion springs 74 and 75 acts with the rear of the left and right pinch levers 49 and 50, respectively. The other end portions of the torsion springs 74 and 75 work with the bent holding portions B5 and C5 of the left and right regeneration sliders 47B and 47C, respectively. In this way, when the left and right playback sliders 47B and 47C slide in the direction of the arrow, the left and right pinch levers 49 and 50 are rotated counterclockwise and clockwise, respectively, so that the same as in the basic embodiment. The left and right capstans 53, 54 configured in such a way.

The substantially T-shaped head slider 48F is provided on the left and right reproduction sliders 47B and 47C so as to slide in the arrows G and F directions. The recess F1 is formed at the end of the center end of the head slider 48F. The axis F2 lying on the main sash 31 passes through the recess F1. That portion of the head slider on both sides of the recess F1 lies on a pair of axes F3 and F4 placed on the main chassis 31. In this way, the head slider 48F makes it possible to slide in the direction of the arrow G until the bottom portion of the recess F1 is in contact with the axis F2.

The through hole F5 is formed substantially in the center of the head slider 48F. The rotation shaft A1 of the main gear cam 47A is inserted into the through hole F5. The pair of sliding holes F6 and F7 are the left and right side playback sliders 47F and 47C of the holding portions B2 and C2, respectively, as described above. Are formed on both sides of the through hole (F5) to be inserted into. In this way, as one of the reproduction sliders 47B and 47C is slid in the direction of arrow G by the main gear cam 41A, the head slide also slides in the direction of arrow G.

A bent portion F8 is formed on one end of the head slider 48F and spring 76. It extends between the bent portion F8 and the shaft 317. In this way, the head slider 48F is pushed in the arrow H direction by the sliding force of the spring 76.

The pair of holding heads 82G and 82H are mounted on the lower portion of the upper surface of the head slider 48F having a space fixed therebetween. The head mounting (F9) is arranged in the middle of the pair of holding heads 82G and 82H, and the recording / reproducing head 55I (four track line) is mounted on the head mounting F9 for vertical movement. do.

The curved strip F10 is formed on the lower edge portion of the head slider 48F, which acts on the position detecting member attached to the main sash 31, for example, the detecting portion J1 of the position detecting switch 48J. The position detection switch 48J corresponding to the head position detection switch 96 of the basic embodiment is turned on when the head slider 48F is furthest in the arrow H direction, that is, when the tape record is in the stop mode. The position detection switch 48J then slides the head slider 48F in the direction of the arrow G to cause the recording / reproducing head 55I to smoothly contact the tape surface (not shown), that is, the tape recorder travels or rewinds at high speed. It is turned off in the playback mode.

When the operating member for normal speed tape feeding is operated for forward regeneration, the main gear cam 41A is rotated counterclockwise in the same manner as in the previous basic embodiment. Subsequently, as shown in FIG. 33, the right block portion A4 of the main gear cam 41A presses the gain portion C1 of the right regenerating slider 47C to counteract the sliding force of the torsion spring 47E. Slide 47C in the direction of the arrow G. At the same time, the holding part C2 of the right regeneration slider 47C pushes the sliding hole edge of the head slider 48F to slide the head slider 48F in the direction of the arrow G against the sliding force of the spring. As a result, the recording / reproducing head 55I mounted on the head slider 48F comes into contact with the tape surface according to the tape feeding direction, and the right pinch lever 50 has the right pinch roller 52 with the right capstan 54 Is moved clockwise by the right playback slider 42C so as to press the tape. In this way, as in the case of the basic embodiment, the auxiliary motor 42 is fixed by receiving a small current to perform the forward regeneration operation.

When the operation member for stopping the tape supply is operated during the forward regeneration operation to cut off the current to the auxiliary motor 42, the head slider 48F and the right regeneration slider 47C are lifted by the springs 76 and 74F, respectively. It is tracked again in the direction of the arrow H by the force, and safely restored to its respective stop position as shown in FIG. As the right playback slider 47C tracks again in this manner, the main gear cam 41A is rotated clockwise as in the basic embodiment and safely restored to its stop position.

The operating member for normal speed tape feeding is operated for reverse regeneration, and the main gear cam 41A is rotated clockwise as in the basic embodiment. Subsequently, as shown in FIG. 35, the left block portion A3 of the main gear cam 41A presses the gain portion B1 of the left reproduction slider 47B to move the reproduction slider 47B to the torsion spring 47D. Slide in the direction of the arrow G against the pushing force. At the same time, the holding portion B2 of the left reproducing slider 47B presses the edge of the sliding hole F6 of the head slider 48F to move the head slider 48F in the direction of arrow G against the sliding force of the spring 76. Slide it. As a result, the recording / reproducing head 55I mounted on the head slider 48F comes into contact with the tape surface according to the tape feeding direction, and the left pinch lever 49 has the left pinch roller 51 with the tape capstan 53. It is moved counterclockwise by the left playback slider 47B to press the tape against the yarns. In this way, as in the basic embodiment, the auxiliary motor 42 is supplied with a small current and fixed to perform the reverse regeneration operation.

The real motor and the main motor 59 are driven for forward and reverse tape feeding in the manner described in connection with the basic embodiment.

As described in connection with the basic embodiment, in the high speed traveling and rewinding tape supply, the real motor is rotated at a speed and a direction corresponding to the high speed traveling or rewinding mode. In this way, high-speed running or rewinding tape supply is performed stably.

When the operating members for normal speed tape feed (forward / reverse play) and high speed tape feed (fast drive and rewind) are operated together for high speed forward play (cue) or rewind play (revival), the main gear cam ( 41A) is rotated according to the operation mode as in the basic embodiment. Then, the left or right reproduction slider 47B or 47C and the head slider 48F slide in the direction of the arrow G. FIG. When the recording / reproducing head 55I is brought into smooth contact with the tape surface along the tape feeding direction as shown in Figs. 36 and 37 degrees, the position detection switch 48J is turned off. At this time, the auxiliary motor driving circuit is controlled by the logic control circuit and the auxiliary motor control circuit so that the auxiliary motor 42 is fixed by receiving a small current. As a result, the main gear cam 41A stops at the predetermined position. In this state, fast driving or rewinding playback (cue or revival) is safely performed.

38 and 39 show a fourth embodiment using a rotating head (two tracks). In this embodiment, extensions L7 and C7 that are substantially inverted L-shaped are formed on the left and right reproduction sliders 47B and 47C similar to those used in the third embodiment. Extensions B7 and C7 are placed below gains B1 and C1 to face each other. The bent portions B8 and C8 are formed at the extended end portions of the extension portions B7 and C7, respectively, to face each other. The ends of the bent portions B8 and C8 overlap each other. The inclined portions B9 and C9 are formed on one portion of the bent portions B8 and C8, respectively.

Instead of the fixed head, a head rotating mechanism 56 similar to that used in the basic embodiment is attached to the head slider 48F similar to that used in the third embodiment. In the head rotating mechanism 56, the driving portion 801 of the fan gear 80 acts on the inclined portions B9 and B9 of the left and right regeneration sliders 47B and 47C. Accordingly, when the left or right reproduction slider 47B or 47C moves in the direction of the arrow G, the driving unit 801 is pressed by the inclined portion B9 or C9 to move the fan gear 80. By doing so, the recording / reproducing head 55 and the erasing head 82 are adjusted in the tape feeding direction as in the basic embodiment.

The head slider 48F slides in the direction of the arrow G when the recording / playback head 55 is adjusted in the tape feed direction after the rotation of the head rotating mechanism 56 by the left and right playback sliders 47B or 47C. It is formed in the space between the holding portions B2, C2 of the left and right reproduction sliders 47B, 47C, and the sliding holes F6, F7 of the head slider 48F.

When the main gear cam 41A is rotated in the manner described in connection with the third embodiment, the left or right reproduction slider 47B or 47C is shown in FIG. 41 depending on the rotational direction of the main gear cam 41A. As shown, the arrow slides in the G direction. In the sliding start stage of the left or right reproduction slider 47B or 47C, the head rotating mechanism 56 is operated by the inclined portion B9 or C9 of the slider 47B or 47C. As a result, the recording / reproducing head 55, the erasing head 82, and the like are adjusted in the tape supply direction, and the holding portions B2 or C2 of the left or right reproduction slider 47B or 47C are moved to the head slider. It is caught by the edge of the sliding hole F6 or F7 of 48F. As the left or right playback slider 47B or 47C slides again in the direction of the arrow G, the head slider 48F slides in the direction of the arrow G so that the recording / playback head 55 and Causes the erase head 82 to contact the tape surface. In this state, a forward or reverse playback operation is performed.

When the auxiliary motor 42 is disconnected from the current supply during the forward or reverse regeneration operation, and the right regeneration sliders 47B, 47C and the head slider 48F are in the third embodiment as shown in Figs. 42 to 44 degrees. Torsion springs 47D, 47E and spring 76 are reliably restored to their respective stop positions in the manner described in connection with this. As the left or right playback slider 47B or 47C retracks in this manner, the main gear cam 41A is safely restored to its stop position.

In the fourth embodiment, it should be understood that the high speed travel and rewind (cue and revie) operations may be performed in the same manner as the third embodiment by using a position detection switch (not shown).

The position detection switch 48J of the third embodiment, in addition to the head position detection switch 96 of the basic embodiment, is used to detect the head position for the cue or revie mode to secure a fixed tape position for accurate cue or revie operation. .

However, it is difficult to actually detect and adjust the head position, that is, to set the proper operating position of the head position detection switch 96. A mode will now be described in which the proper operating position of the head position detection switch 96 can be set easily and safely in accordance with the present invention.

As shown in FIG. 45, the acting portion 48a protrudes from the upper portion of the head slider 48 similar to that used in the basic embodiment. In this way, the head detection switch 96 actuates or loosens the switch operating member 961 and the acting portion 48a when the head slider 48 slides in the direction of the arrow G or H. It may be turned on or off depending on the predetermined position of.

The guide member 963 placed on the main sash 31 acts on the knot hole 961a of the switch operating member 961 having three retaining portions a, b, and c in the middle portion. In this way, the switch actuating member 963 can move in the directions of the arrows X and Y around the acting portion. Normally the switch actuating member 961 is pushed in the direction of arrow Y by a spring 964 extending between its far end and the main sash 31.

In the switch actuating member 961, the acting portion 961b protruding from the close end is placed on the path of the acting portion 48a of the head slider 48. In addition, the operation shaft 96a of the head position detection switch 96 on the rear surface of the main chassis 31 is fitted to be able to act on the rectangular hole 961c formed at the far end of the switch operating member 961.

Therefore, in the above-described configuration, the position of the guide member 963 is appropriately shifted between the three holding points a, b, and c of the retaining hole 961 of the operation switch operating member 961 of the head position detection switch 96. Can vary. After normally being placed at the central point b, the guide member 963 is moved between the holding point b and one of the other holding points a and c so that a suitable operating position can be set for the actual head position detection.

46 and 47 show the positions before and after the switch is operated when the elastic acting portion is adjusted to the central holding point a, respectively. Similarly, Figures 48 and 49 show the positions before and after the switch is activated, respectively, when the acting portion is adjusted to the holding point c. And Figures 50 and 51 show the position before and after the switch is activated when the acting portion is adjusted to the holding point c.

When the switch is actuated, the switch magnetic element 961 moves in the direction of arrow G against the sliding force of the spring 964 as the head slider 48 moves upward as illustrated.

In this way, the operation shaft 96a of the head position detection switch 96 is pressed down to open its contact portion.

Before the switch is actuated, the switch actuating member 961 is moved in the direction of arrow Y by the sliding force of the spring 964 as the head slider 48 moves downward as illustrated. In this way the operating axis 96a of the head position 96 is lifted up so that its contact is closed.

In this way, the operation position and head position of the head position detection switch 96 and the holding points for the switch operating member 961 can be adjusted to an appropriate position by simply changing.

As shown in FIG. 46, the head position detection switch 96 has first and second contact portions 96A and 96B that are closed and open respectively when the switch is actuated. Now, the operating time of the first and second contact portions 96A, 96B is opened for a short time before the second contact portion 96B is closed, and shortly after the first contact portion 96 is opened. Set appropriately to close for a time.

Although the head position can be detected easily and safely in the manner described above, it is difficult to start the cue or revie operation immediately after the head position detection switch 96 is operated. The reason is that there is a time delay between the operation of the system and the mechanical system with all the opportunities necessary for queue and revival operation. In fact, the head position in the cue or revival operation is set slightly back than in the case of the normal speed reproduction operation. If a cue or revie operation is initiated immediately after the operation of the head position detection switch 96, it will be difficult to properly adjust the retraction distance of the head position.

We will now describe how the proper position can be safely obtained even if the retraction distance of the head position is short during the cue or revie operation.

FIG. 52 shows the auxiliary motor driving circuit section shown in FIG. In FIG. 52, the second contact portion 96b of the head position detection switch 96 is inserted between the resistor R5 of FIG. 20 and the power supply (+ B). The collector-emitter of transistor Q20 is connected across the second contact portion 96B. Transistor Q20 has its base connected via resistor R20 to the collector of transistor Q20, the emitter of transistor Q21 being grounded and the base through resistor R21 connected to control terminal CT (described later).

In such a configuration, a series of operations to proceed to the stop mode, the forward regeneration mode and then back to the stop mode are executed as follows.

When the switch 86 is operated at time T11 shown in FIG. 53, the auxiliary motor 42 is supplied with a predetermined forward current as shown in FIG. 53 (a). As a result, the head slide 48 transitions to the PLAY position at time T12 in the manner mentioned above as shown in FIG. 53 (e).

At this moment, the second contact portion 96B of the head position detection switch 96 is closed as shown in the 53 (e). In the case of the first contact portion 96A, it is opened slightly earlier as shown in the 53 (c). In this case, the driving motor 42 is closed with a certain time delay of the first contact portion 86A of the head position detection switch 96.

Fig. 53 (d) shows a signal indicative of a tape supply direction with respect to the playback mode selected by the switch in conjunction with the head rotating mechanism 56 used in the basic embodiment.

FIG. 54 shows another series of operations similar to those shown in FIG. 53 which proceeds to the stop mode, the reverse regeneration mode and then returns to the stop mode.

Now, another series of cue operations will be described as one of two fast playback operations.

In this case, the auxiliary motor 42 has already been fixed in the forward regeneration mode, and as shown in Fig. 55 (a), the switch 89 for supplying the tape of the high-speed traveling described in connection with the basic embodiment at time T21. It works. Subsequently, transistor Q6 of FIG. 52 is turned off in the same manner as the basic embodiment shown in FIG. In the control circuit (not shown, equivalent to the circuit 85 of FIG. 20), when the control signal supplied to the control terminal CT is inverted from the H level to the L level, the resistor R5 is opened so that the transistor Q5 is also turned off. As a result, the auxiliary motor 42 is once stopped at this point.

Subsequently, the head slider 48 is once moved from the playback position toward the stop position as shown in FIG. 55 (e). In this process, since the second contact portion 96B of the head position detection switch 96 is opened as shown in FIG. 455 (c), the transistor Q5 is turned on again.

As a result, the auxiliary motor 42 starts to receive a predetermined forward current again and the head slider 48 is moved back toward the regeneration position. Subsequently, since the second contact portion 96B of the head position detection switch 96 is opened, the transistor Q5 is again cut off to stop the auxiliary motor 42. In this way, the head slider 48 is moved toward the stop switch.

As a result, the second contact portion 96B of the head position detection switch 96 is closed to turn on the transistor Q5. In this way, the auxiliary motor 42 starts to move the head slider 48 again toward a reproduction position. Subsequently, the second contact portion 96B of the head position detection switch 96 is opened again to block the transistor Q5. In this way, since the auxiliary motor 42 is stopped, the head slider 48 is moved again toward the stop position.

As the movement of the head slider 48 is repeated 2 1/2 times as shown in FIG. 22 (c), the position of the head slider 48 is gathered to a proper position for the cue mode. The transistor Q5 is turned on when the control signal supplied to the control terminal CT returns to the H level at time T22 to reach a proper position. At the same time, the transistor sheet Q6 is turned on by the H level from the signal output terminal T-out of the logic control circuit 85 of the basic embodiment shown in FIG. 20, so that the auxiliary motor 42 is fixed. In this way, the head slider 48 is placed at the position shown in FIG. 55 (e).

By moving the head slider 48 a predetermined number of times in this manner during a cue or revie operation, it can be safely adjusted to the head position and the retraction distance can be reduced.

So far, embodiments of the present invention have been described in detail with reference to the accompanying drawings, but are not limited only to this embodiment of the present invention, and various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the present invention. Should be understood.

According to the present invention, as described in detail herein, the motor driving aid used here is improved to be as simple and satisfactory as possible in construction, particularly suitable for small devices in terms of power consumption and price. An improved tape recorder is provided.

Also, according to the present invention, an improved tape recorder is provided so that the motor driving aid can satisfactorily perform the automatic reverse rotation queue and the revie operation.

According to the present invention, there is provided a tape recorder which can safely detect the head position with a motor driving aid and easily control the head position.

Claims (11)

(Correction) A tape recorder having a motor drive mechanism for automatically shifting the tape drive mechanism, the forward or reverse direction from the auxiliary motor 42 and the auxiliary motor 42 in the forward or reverse direction when the tape supply operation member is operated. And a shift control mechanism 40 for shifting the tape drive mechanism with the head control mechanism to a position for forward or reverse tape supply under rotational force, and a logic control circuit 85 for controlling the auxiliary motor under specific conditions. Tape recorder device. (Correction) The circuit according to claim 1, wherein the logic control circuit 85 includes a motor-fixing circuit for supplying a small current to the auxiliary motor 42 to fix the motor after shift control by the shift control means. Tape recorder device. (Correction) The auto-reverse mechanism according to claim 1, wherein the shift control mechanism 40 shifts the normal speed tape supply direction for each of the two directions from a given normal speed tape supply position between two opposite directions. A tape recorder device, characterized in that associated with. (Correction) The cue or libe mechanism according to claim 1, wherein the shift control mechanism 40 shifts the tape recorder to a tape feed mode at a normal speed in the same or opposite direction as the high speed tape feed in one specific direction. A tape recorder device, characterized in that associated with. (Correct) The tape recorder device according to claim 1, wherein the shift control mechanism (40) is associated with a head control mechanism for adjusting the head in the tape feeding direction. (Correct) The tape recorder device according to claim 1, wherein the logic control circuit (85) is controlled by a signal from a head position detection switch (96) controlled by a shift control mechanism (40). 7. The motor according to claim 6, wherein the head position detection switch (96) is coupled to a circuit for generating the required signal so that the head is in soft contact with the tape when the shift control mechanism (40) is associated with a cue or a lieutenant mechanism. A tape recorder device, characterized in that the fixed state. 7. The tape recorder device according to claim 6, wherein the head position detection switch (96) has a plurality of selectable holding points and is turned on and off by an operating member associated with the shift control mechanism (40). 7. The head position detecting switch (96) according to claim 6, wherein the head position detecting switch (96) is necessary to move the head a predetermined number of times near the position where the head smoothly contacts the tape when the shift control mechanism (40) is associated with a cue or a liquor mechanism. A tape recorder device having a plurality of contacts for generating a signal. 2. A playback slider (47) according to claim 1, wherein the shift control mechanism (40) slides substantially parallel to the tape feed direction so as to control the pinch roller provided in the tape drive mechanism for a specific condition and with respect to a specific position. And a head slider (48) which slides substantially perpendicular to the tape feeding direction to control the head. 2. The independent of claim 1, wherein the shift control mechanism (42) is independently substantially parallel to the tape feed direction to control the corresponding pinch rollers (45, 51, 52) provided in the tape drive mechanism for specific conditions. Two playback sliders 47B and 47C for forward and reverse tape feeding to slide and a common head slider 48F that slides in the same direction as the sliding direction of the two playback sliders 47B and 47C to control the head for a predetermined position. Tape recorder device, characterized in that formed by ().

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