JPS6018835A - Invertible tape recorder - Google Patents

Abstract

PURPOSE:To secure the assured actuation of a invertible tape recorder by using the combination of mechanical detecting actions to perform selection between a reverse mode where the tape driving direction is switched in a tape end detection mode in response to each mode and also the head is inverted and a stop mode where the tape drive is stopped. CONSTITUTION:A invertible tape recorder 1 consists of a mode selection mechanism 2, a miserasion preventing pawl detecting mechanism 3, a tape driving direction detecting mechanism 4 and a fast forward/rewind mode displacement mechanism 5. When the tape drive ends, a reverse mode where the head and then the tape driving direction are inverted or a tape drive stop mode is automatically selected by a mechanism. It is possible to select an operation where the head is inverted by a mechanical logic in a tape end mode or an operation where the tape drive is stopped in accordance with the mechanical displacement of each mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reversible tape recorder, and particularly to a reverse mode in which the tape running direction is switched and the head is reversed when the tape end is detected depending on each mode, and a stop mode in which tape running is stopped. It is configured to function inexpensively and reliably by combining mechanical detection operations such as mode selection, tape running direction in the forward or reverse direction, presence or absence of the W4 play prevention claw in the reverse direction, and fast forward and rewind modes. The purpose of the present invention is to provide a reversible tape recorder.

In conventional reversing tape recorders, mode selection,
Tape running direction, presence or absence of a claw to prevent accidental erasure.

When the fast forward/rewind mode, etc. is detected electrically through the switches of each detection section, and these electrical signals are supplied to the electrical circuit, the electrical circuit will detect the fast forward/rewind mode, etc. at tape turn, depending on the combination of the supplied electrical signals. It was configured to select either reverse mode or stop mode. However, the conventional reversing type recorder uses a large number of expensive switches and has the disadvantage that the VJ construction cost is high.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

In addition, a repeat mode (hereinafter referred to as 0 mode) in which the tape running direction is alternately repeated in the forward direction and the reverse direction and the head is alternately reversed, and a forward direction J: a repeating mode in which the tape running direction is reversed only in the reverse direction and the head is reversed. A reversal mode (hereinafter referred to as U mode) in which the tape is reversed to the side, and a unidirectional T-mode (hereinafter referred to as L mode) in which the tape stops at the end when the tape runs in one direction will be explained separately.

The table below shows whether tape running is in reverse mode or stop mode depending on the tape end detection and each mode, and each mode will be explained with reference to this table.

D: Reverse mode S: Stop L mode m: Mode setting not possible (1) O mode FIG. 1 is a plan view of an embodiment of the reversible-arr recorder according to the present invention. In Figure 1, reversible tape recorder 1
is the mode selection mechanism 2. πl erasure prevention claw detection mechanism 3. Tape running direction detection mechanism 4. It has a fast forward/rewind mode displacement mechanism 5. On the front side of the reversible tape recorder 1, operation buttons 6 (pause button 6a, fast forward button 6b, play button 3c, record button 5d, rewind button 60, stop button 6[) are arranged for each mode. 7 is the forward side take-up reel stand, 8 is the reverse side take-up reel stand, 9 is the forward side carburetor, 10 is the reverse side key A7 push stand, 1
1 is a forward side flywheel, 12 is a reverse side flywheel, and 13 is an attached tape cassette.

14 is the mode selection lever, with O mode at the tip.

Four parts 14a for -E-do positioning in U mode and 1 mode
~1/The four parts 14a of the IC are fitted into the protruding pins 15a of the chassis base 15 and are in the O mode setting position.

Reference numeral 16 denotes a detection operation arm, which has an extended contact portion 5-16a, and when the contact portion 16a does not have a claw 13a for preventing accidental erasure in the reverse direction of the cassette 13, when the recording mode is entered, the arrow A claw detection member 17 that slides in one direction or a tape running direction detection lever 18 that moves in the direction indicated by the arrow when the tape running direction is in the reverse direction come into contact.

Therefore, the detection arm 16 rotates clockwise upon contact with the claw detection member 17 or the detection lever 18 to detect the tape running direction or the presence or absence of the accidental erasure prevention claw 13a. 19 is a switching operation arm with an engaging pin 19 at its tip.
a, and has an engagement hole 19b on the side. Reference numeral 20 denotes a mode switching member, which is rotatably supported by the support base 21, and is rotated clockwise, which is the reverse mode side, by engagement with the engagement pin 19a of the switching operation arm 19. The mode selection mechanism 2 includes the mode selection lever 14. Detection operation arm 16. Switching operation arm 19. Mode switching member 20
It is roughly composed of.

Reference numeral 22 denotes a claw detection plate in the reverse direction, which is biased in the direction of arrow Y1 by the tensile force of the coil spring 23 and comes into contact with the claws 13a of the cassettes 1 to 13 as shown in FIG. is engaged with the recess 17a of the claw detection member 17 to lock the claw detection portion tl'17.

Nail detection I to prevent accidental erasure! 14f43 is roughly constituted by a claw detection member 17 and a claw detection plate 22. In addition, 24 is a forward direction pawl detection plate, which comes into contact with the forward direction erroneous performance prevention pawl 13b of the cassette 13 and detects the coil spring 8.
6 and is displaced in the direction of arrow Y1, and the presence of the claw 131) is detected. Tape running direction detection lever 1
8 has a single-shape, and the tip is a fork-shaped engagement ti1
1sa times depending on the tape running direction? It is engaged with the engaging portion 25a of the tape running direction selection rotary lever 25 that moves 1+, and is provided so as to be freely movable in the directions of the arrows X+ and X2.

The tape running direction detection mechanism 4 is roughly constructed by the detection lever 18 and the rotating lever 25.

Reference numeral 26 denotes a fast forward 1 rewind mode detection lever, which is installed on the front side of the base 15 so as to be biased in the arrow 1x2 direction by the tension of the spring 85, and to be able to slide freely in the arrow X+ and X2 directions. The detection lever 26 is fitted into the recesses 27a and 28a of the fast-forward lever 27 or the rewind lever 28, and is displaced in the direction of arrow X2. 29 is a connecting lever;
The arm portion 29a, which has a dogleg shape, is brought into contact with the detection lever 26, and the protruding pin 29C at the tip of the other arm portion 29b is engaged with the engagement hole 19b of the switching operation arm 19. is supported on the shaft 15b.

The forward/rewind mode displacement mechanism 5 is connected to the detection lever 2 described above.
It is roughly constituted by six connecting levers 29.

Reference numeral 30 denotes a recording mode detection lever, which is provided on the front side of the chassis base 15 so as to be slidable in the directions of arrows X+ and recess 32a
It is incorporated into.

Reference numeral 33 denotes a connecting member, which has three protruding bottles 33a to 33c, the front protruding bin 33a being engaged with the recess 301) of the recording mode detection lever 30, and the protruding pin 33h.
The protruding pin 14.13 on the lower side of the mode selection lever 14
A manual reverse lever 1° 35 is engaged with the engagement hole 34a at the tip of the switching rod 34, and is rotatably supported on the shaft 15c of the chassis base 15. 36 rotatably, and the shaft 15 (
1, is urged in the direction of arrow Y1 by the tensile force of the coil spring 37, and is locked to the protruding pin 15e. still,
The contact I collar 36 has a long hole 36a engaged with the protruding pin 33c of the connecting member 33, and the manicoal reverse lever 3
Arrow Y+ according to the rotation of 5.

138 is a switching actuation lever that moves in the Y2 direction, and has a contact portion 38a at the tip of which the tip of the contact lever 36 or the mode switching member 20 comes into contact, and an engaging portion 38b extending on the opposite side of the contact portion 38a. It is rotatably supported on a shaft 15f. Further, the switching operation lever 38 is rotated clockwise to bring the engaging portion 381) into contact with the pin 39a of the partially toothed gear 39, and the partially toothed gear 39 is rotated in the clockwise direction. The tape running direction is switched to the opposite direction as described later.

40 is for the rotary lever for recording mode, and the front engagement part 40a is connected to the protruding bin 30 of the recording mode detection lever 3o.
C, and the protruding bottle 4 on the rear side. A coil spring /1.1 mounted between the claw detection member 17 and Ob is 1.
■It has been played.

Reference numeral 42 denotes a t-mode switching solenoid, which is energized when supplied with an electric signal from the tape end detection element/I3, and rotates the rotation lever 44 in the counterclockwise direction.

Reference numeral 45 denotes a sliding lever, which uses the rotational force of the forward side take-up reel stand 7 or the reverse side take-up reel stand 8 in the tape winding direction while the tape is running to transmit the lower one-way latch of the reel stands 7 and 8 (Fig. (not shown) in the direction of arrow X1, and as shown by the dashed line, the T-shaped arm 46 is regulated in a standby state by the abutting part 45a at the tip, and the abutting part 45a
On the opposite side thereof, there is a protruding pin 4.5b which abuts on the engaging portion 44a at the tip of the rotating lever 44. The T-shaped arm /16 also has a pin 4.68 at its tip that engages with the cam 47a of the cam gear 47. Reference numeral 48 denotes a 1-shaped lever, which is rotatably connected to the T-shaped arm 46 on the front side, and has an engaging portion 48a on the other side that engages with the protruding pin 21a10- on the rear side of the support base 21. It is rotatably supported on the shaft 15f of the chassis base 15 and is biased to rotate in the h1 direction when it is in tension.

50 is a lock plate, and the operation button 6 is pressed in the direction of arrow Y1.
is locked in the operated state and is biased in the two directions of arrows by the tensile force of the coil spring 51, and has an engaging portion 50a. Reference numeral 52 denotes a stop mode lever, which has a front engaging portion 52a and a contact portion 52b that comes into contact with each other when the rear mode switching member 20 moves in the arrow Y1 direction, and is moved by the tension force of the coil spring 53 in the arrow Y2 direction. energized in the direction of arrow Y+, Y2
It is designed to be able to slide freely in any direction. 5/I is a transmission part shrine, with a protruding bottle 54. a1541) and is supported on the shaft 15 (+) of the chassis base 15. Also, the transmission member 54 connects the protruding pin 54.a to the engaging portion 5 of the lock plate 50.
0a, the protruding pin 541) is engaged with the engaging portion 52a of the stop mode lever 52, and the lock plate 50 is rotated by the operation of the stop mode lever 52 to move the lock plate 50 in the arrow x1 direction.

As shown in FIG. 3, the mode selector tI42, which is a main part of the reversible tape recorder according to the present invention, is assembled via a 411 member 55. Mode selection lever 14
．． The detection operation arm 16.1 full standing member 55 and the switching operation arm 19 are each coaxially and rotatably supported on a shaft 15h on the chassis base 15. The assembly member 55 has an engagement pin 55a on the top side.

55 b, and protrude the engagement pins 55 c and 55 d from the lower surface side 1! It has a latching hole 55e for latching a spring and a spring mounting part 55f for winding an arc-shaped spring.

Therefore, the mode selection mechanism 2 fits the engagement pins 55a and 55b of the assembly member 55 into the arc-shaped engagement holes 19c and 19d of the switching operation arm 19, and furthermore, the detection operation arm 1
No. 6 arc-shaped engagement hole 16b.

16c and the arcuate engagement 7L1 of the mode selection lever 14
4d and 14e engage the assembly member 55>55a.

55d are fitted and stacked, and then attached to the shaft 1511. Meanwhile, the mode selection lever 14 is biased clockwise by the tensile force of a coil spring 56 hooked between the protruding pin 14f on the upper surface side and the locking hole 55e of the assembly member 55. The detection operation arm 16 has a vertical engagement hole 16.
The assembly part I, in which the coil spring 57 is wound around d, is inserted into the spring mounting part 55 of 155, and the coil spring 57 is compressed.
It is rotated counterclockwise by the elastic force of the spring 57, and the contact portion 16a is brought into contact with the claw detection member 17 and the tape running direction detection lever 18. The switching operation arm 19 is connected to the protruding bottle 19e on the upper surface side and the latching hole 55e of the assembly member 55.
The mode switching member 20, which engages with the engagement pin 19a, is rotated counterclockwise by the tensile force of a coil spring 58 hooked to the pin 19a.

As shown in FIG. 4, the mode switching member 20 is connected to the groove 2.
The engagement pin 19a of the switching operation arm 19 is fitted into the switching arm 0a, and when the arm 19 rotates clockwise, the contact portion 20b is engaged with the contact portion 52 of the stop mode lever 52, as shown by the solid line.
When the arm 19 is rotated in the direction of the arrow A1 so as to be opposite to the arrow A1, and the arm 19 is rotated counterclockwise, the contact portion 20c is switched to the contact portion of the operating lever 38, as shown by the broken line 13-. J to be opposed to 38a: rotates in the direction of arrow Δ2 and is located on the reverse mode side.

In FIG. 5, reference numeral 60 denotes a drive motor that rotationally drives the flywheels 11 and 12 via a belt 61. Further, a pulley 62 that rotates together with the take-up flywheel 11 drives pulleys 64 and 65 via a belt 63. 66
is a head which is supported by a head holder 67 and has a head rotating gear 66a that meshes with a sector gear 68 on the front side. 69 is a head reversing lever, and the sector gear 6 is located on the front side.
It has a bifurcated engaging portion 69a that engages with the end portion 68a of 8, and is rotatably supported by a shaft 74. Further, the head reversing lever 69 has a protruding pin 69b on the rear side, and the protruding pin 69b is fitted into a cam groove 76a of a head reversing cam gear 76 that meshes with a small gear 75 that is integrated with the partially toothed gear 39. There is. The gear ratio between the small gear 75 and the head reversing cam gear 76 is 1:2, and when the small gear 75 rotates once, the cam gear 76 rotates half a rotation.

14- Tape running direction selection 1 collar 25 is the contact part 25a at the tip
The lever 79 on the supply side is separated from the lever 78 on the take-up side.
Select the tape winding drive system on the take-up reel side by abutting U, and set the tape running direction on the forward side. In addition, the head is connected to the head reversing collar 69 via a spring 80.

The lever 254 also has a contact portion 25b that contacts the arm 71 of the pinch roller 70 on the take-up side and a contact portion 25c that contacts the arm 73 of the pinch roller 72 on the supply side. Reference numeral 81 designates a head pushing lever whose arm portion 81a is in sliding contact with the cam 82a of the partially toothed gear 82, and in conjunction with the rotation of the partially toothed gear 82 during the fast forward/rewind mode, the head holder 67 is moved by the arm portion 811). The head base 83 on which the is placed and fixed is pushed back in the direction of arrow Y2. 84 is an L-shaped lever, and the arm part 8
4a is in sliding contact with the cam 82I) of the partially toothed gear 82, and only the selection lever 25 is rotated to the neutral position in conjunction with the rotation of the partially toothed gear 82 during the fast forward/rewind mode.

When the playback button 6C is pressed in the direction of arrow Y1 when the mode is 0,
The lock plate 50 moves in the two arrow directions to lock the regeneration lever 90, which is an integral part of the regeneration button 6C, at the operating position, and also turns on the motor switch (not shown) to rotate the drive motor 60, thereby rotating the flywheel 11. 12. The head reversing lever 69 is connected to the cam groove 76 of the head reversing cam gear 76.
The pinch roller 72 on the supply side is separated from the capstan 10 and the pinch roller 70 on the take-up side is rotated clockwise to engage the tape 13 of the cassette 13.
The tape 13c is brought into pressure contact with the capstan 9 via C to run in the forward direction.

Further, the head 66 moves in the direction of arrow Y1 together with the helad base 83 to attach the tape 13C.

When the tape 13C is wound onto the take-up reel stand 7 side and forward playback is completed, the tape end is detected by the detection cable /43.
It is detected more than once. As a result, the solenoid 42 is energized to pull the rotating lever 44 as shown by the two-dot chain line and rotate it counterclockwise, and in conjunction with this, the sliding lever 45 is moved in the two directions of the arrow. Therefore, the ■-shaped arm 46 is allowed to rotate counterclockwise by separating the contact portion 4.6a of the sliding lever 45. The pin 46a of the T-shaped arm 46 engages with the cam 47a of the cam gear 47, and as the cam gear 47 rotates counterclockwise, 1-
Rotate the letter-shaped lever 48 counterclockwise as shown by the two-dot chain line 1! Ru. The L-shaped lever 48 moves the support base 21 in the direction of the arrow Y1 to close the contact portion 20 of the mode switching member 20.
c is brought into contact with the switching actuation lever 38. As a result, the lever 38 is rotated counterclockwise and the pin 3 of the partially toothed gear 39 is rotated.
9a to push it and rotate the partially toothed gear 39 clockwise.

Therefore, the toothless gear 39 has the toothless portion 39b on the drive gear 91.
The partially toothed gear 39 and the drive tooth) i(
91 mesh with each other, and the toothless portion 39b rotates once again until it opposes the drive gear 91.

The cam 390 integrated with the partially toothed gear 39 is the head pushing lever 8.
1 by a predetermined angle counterclockwise.

Therefore, the lever 81 uses the arm portion 81b to move the head base 83 in the direction of arrow Y2, and the head base 8317- is pushed back in the direction of arrow Y2 to the magnetic head rotation position.

The cam gear 76 that meshes with the small gear 75 of the partially toothed gear 39 is
Due to the gear ratio with the small gear 75, the partially toothed gear 39 rotates approximately 180° during one rotation. Therefore, the head reversing lever 69, in which the protruding pin 69b is fitted into the cam groove 76a of the cam gear 76, slides into contact with the cam groove 76a of the center side from the outer peripheral side as the cam gear 76 rotates counterclockwise. It moves and rotates clockwise around the shaft 74.

Further, the engaging portion 69a of the head reversing lever 69 is connected to the sector gear 6.
The sector gear 68 is engaged with the protruding pin 68a of No. 8 and rotated clockwise, and the head 66 is rotated half a rotation in the head holder 67 together with the gear 66a, thereby switching to the reverse mode.

The tape running direction selection lever 25 rotates clockwise together with the lever 69 through the elastic force of the torsion spring 80. Therefore, the contact portion 25a of the selection lever 25 is spaced apart from the lever 79 on the reverse side, and the lever 78 on the forward side
It touches and pushes.

18- The lever 78 rotates in the counterclockwise direction 61 against the tensile force of the spring 78a, thereby separating the transmission gear 92 from the take-up reel stand 7 and the gear 93 on the first-ward side. In addition, the engaging portion 25a
The lever 79 on the reverse side, whose restriction has been lifted, is the spring 97.
The transmission gear 9 rotates counterclockwise in the h1 direction due to the tensile force of 1;
5 and a gear 96 that meshes with the reverse side take-up reel stand 8;
The pulley 65 meshes with a gear 65a integral with the pulley 65 to form a reverse direction tape winding drive system.

Further, the lever 25 is rotated clockwise to prevent the abutting portion 25 from moving.
b is brought into contact with the arm 71, the arm 71 is rotated counterclockwise, and the contact portion 250 is separated from the arm 73. Therefore, the pinch roller 70 on the forward side is spaced 111 distance from the capstan 9. Reverse side arm 73
rotates counterclockwise to press the pinch roller 72 onto the reverse side capstan 10 via the magnetic tape 13C.

When the cam 390 of the partially toothed gear 39 rotates once, the lever 81
rotates clockwise, the head base 83 moves in the direction of arrow Y.
Move in one direction. The head 66 returns to the recording/reproducing position after making a half turn toward the reverse side, and attaches to the tape 13c. Therefore, the tape 13c that has been easily reproduced by the head 66 in the reverse direction 1 is sent in the reverse direction by the rotation of the capstan 10 and the pinch roller 72, and is wound onto the reverse side take-up reel stand 8. . Also, tape 1
30 is wound onto the reverse side take-up reel stand 8 and the reproduction mode in the reverse direction ends, the detection element 43 detects the end of the tape again and the tape running direction is switched from the forward direction to the reverse direction. A similar operation automatically switches from the reverse direction to the forward direction again.

Therefore, in the O mode reproduction mode, reproduction is repeated alternately in the forward direction and the reverse direction.

Next, press the record button 6d in the direction of arrow Y1 in 0 mode ()
6, the recording mode lever 32 and the reproduction mode lever 90 are locked by the lock plate 50 at the operating position, and the recording mode detection lever 30 is moved in the direction of the arrow x2.1! Ru. The lever 30 rotates the connecting member 33 clockwise and moves the switching rod 34 in the direction of arrow Y2. For this reason, mode selection lever 1
4 is mechanically rotated in the direction of arrow B by the movement of the rod 34, and the recess 1/1b is fitted into the pin 15a, thereby switching from 0 mode to U mode. Therefore, even if the recording mode is operated in the 0 mode, the recording mode is automatically switched to the U mode, thereby preventing malfunctions such as repeated recording on forward and reverse side tape tracks that have been recorded once, as will be described later.

In addition, when the operation is performed from the O mode to the recording mode and there is no erroneous erasure prevention claw 13a in the reverse direction, the lever 30 and the rod 34 act as shown in FIG.
The state is automatically switched to the J mode without the erroneous erasure prevention claw 13a, and the stop mode is entered upon detection of the tape end in the forward direction, as will be described later.

Also, if you operate the forward/rewind mode in O mode,
As shown in FIG. 8, for example, by pressing the fast forward button 6tl in the direction of arrow Y1, the fast forward mode μ21-bar 27 is locked by the lock plate 50 at the operating position.

Along with this, the fast forward 1 rewind mode detection lever 26 moves in the direction of arrow x1. Therefore, by rotating the connecting lever 29 counterclockwise, only the switching arm 19 of the mode selection mechanism 2 is rotated clockwise. That is, the mode switching member 20 rotates to the stop mode side, and whether the tape running direction is forward or reverse, the mode switching member 20 is rotated together with the base 21, which moves in the direction of arrow Y1, in the same way as when switching the tape running direction by detecting the tape end. Contact part 20
b is brought into contact with the contact portion 52b of the stop mode lever 52, and the stop mode lever 52 is moved in the direction of arrow Y1. Therefore, by moving the stop mode lever 52 in the direction of arrow Y1, the lock plate 50 is moved in the direction of arrow Y1 via the transmission member 54.
direction, the fast-forward mode lever 27 is released from the operating position, and the fast-forward button 6b is returned to its original position.

Also, in conjunction with the movement of the lock plate 50 in the arrow x1 direction, a moving lever (not shown) that moves the head base 67 in the arrow Y1 direction is unlocked, and the head 22 - drawer 6 is moved to the head holder 83 . Both return in the direction of arrow Y1 and reach the stop mode position.

In addition, although I explained the ♀ forward mode in the explanation above, the above also applies to the rewind mode and the so-called cue mode for fast forwarding and searching a recorded song. Ministry! ij+ff in the same way as in the feed mode. In addition, during fast forward/rewind mode, not only in 0 mode but also in IJ mode and I mode, the tape switch will switch to stop mode when the tape end is detected, regardless of whether the tape running direction is forward or reverse, as described in item 2. .

In addition, in O mode, you can operate the lever 14 to enter playback mode or record mode, fast forward/rewind [-] mode to enter U mode or I mode, and in U mode or I mode, playback mode or ♀ forward/rewind mode. From U mode to 0 mode, from U mode to I mode, or from I mode to U''
UU needle can be changed. However, in the case of recording mode, it is possible to switch from U mode to ■ mode or from [mode to U mode, but when switching from U mode to O mode, the lever 14 moves in the direction of the arrow Y2 of the rod 3/l. Since it is rotated from the O mode position to the J mode position by movement, switching operations cannot be performed and erroneous operations are reliably prevented.

(2) U mode As shown in FIG. When b is fitted into the bin 15a, the mode selection mechanism 2 is set to the U mode. Play button 6
When C is pressed in the direction of arrow Y1 to operate the playback mode in the forward direction, the tape 13G is wound onto the forward side take-up reel stand 7. When the tape 13c is wound and playback in the forward direction is completed and the tape end is detected by the tape end detection element 43, the tape 13c is rotated to the mode switching side in the same way as when playing back in the O mode. By moving the mode switching member 20 in the direction of arrow Y+, the switching actuating lever 3
8 rotates counterclockwise to rotate the head 66 by half a rotation, and at the same time, switches the tape running drive system to the reverse direction.

Therefore, as shown in FIG. 1, the tape running direction selection rotary lever 25 rotates in the cutting direction, moves the tape running direction detection lever 18 in the direction of arrow x1, and the tape running direction is set in the reverse direction. In order to detect this, the lever 18 rotates the detection arm 16 clockwise.

Since the mode selection lever 14 is in the U mode position, when the arm 16 rotates in one direction, the switching operation arm 19 engages with the protruding pins 55a to 55d of the assembly member 55.
rotates clockwise. Therefore, mode switching member 2
0 is rotated toward the stop mode side, causing the contact portion 201) to face the contact portion 52b of the stop mode lever 52.

When the tape 13c runs in the reverse direction and is wound up by the rotation of the reverse take-up reel stand 8 and the tape end is detected, the base 21 moves in the direction of the arrow Y1 in the same manner as described above. As shown in FIG. 10, the mode switching member 20 located on the stop mode side moves the stop mode lever 52 in the arrow Y1 direction with the movement of the base 21, and moves the lock plate 50 in the arrow X + force direction via the transmission member 54. to cancel playback mode and switch to stop mode. Immediately 25
- When the forward playback ends, the tape running direction switches to the reverse direction and the head 66 rotates half a turn toward the reverse side, and when the reverse playback ends, the tape enters the stop mode.

Next, if you operate the recording mode in the U mode and there is a claw 13a for preventing accidental erasure in the reverse running direction, we will explain it.
Ru. When the play button 6C and the record button 6d are pressed to enter the forward recording mode, the lever 30 moves in the direction of the arrow X2, and the rotary lever 40 is rotated in the n1 direction. However, since the claw detection plate 22 moves in the direction of the arrow Y1 and detects the presence of the claw 13a, the movement of the claw detection member 17 in the direction of the arrow X1 is restricted by which engagement of the pin 22a. Therefore, the displacement of the rotating lever 40 is controlled by the coil spring 4.
Absorbed by a tension of 1. That is, the mode selection mechanism 2 operates in the same manner as in the playback mode of the above-mentioned paste mode, and when the tape 13c is wound in the forward direction and the forward recording mode is completed, the mode selection mechanism 2 automatically changes the tape running direction to the reverse direction. Switch, but tape 1 in the reverse direction.
30 is wound up to 26-, and the recording mode ends and the mode switches to the stop mode.

Further, a case will be described in which there is no erroneous erasure prevention claw 13a in the reverse direction in the U mode recording mode.

As shown in FIG. 7, when the play button 6C and the record button 6d are pressed, the rotary lever 40 is rotated clockwise via the lever 30 in the same manner as described above. However, since there is no claw 13a, the claw detection plate 22 is moving in the direction of arrow Y2, and the bin 22a is spaced apart from the recess 17a, allowing the claw detection member 17 to move. Therefore, the pawl detection member 17 is moved in the direction of arrow x1 by the tensile force of the coil spring 711 due to the displacement of the rotary lever 40.

Therefore, the arm 16 of the mode selection mechanism 2 is rotated clockwise, and the mode switching member 20 is moved to the stop mode side via the arm 19, as in the case where the tape running direction in the U mode playback mode is the reverse direction. It is rotated to

That is, in the forward direction recording mode, the tape 13c is wound on the forward side take-up reel stand 7 and the tape end is detected, and the mode switching member 20 moves the stop mode lever 52 in the direction of arrow Y1 to stop the tape 13c. mode. Therefore, malfunctions such as erroneously recording new information on tape tracks in the reverse direction can be prevented.

(311 mode As shown in FIG. 11, when the mode selection lever 14 is rotated in the direction of arrow B to fit the recess 14.c into the bin 15a, the mode selection mechanism 2 is set to the ■ mode.Mode selection Since the lever 14 is in the ■ mode position, the switching operation arm 19 is rotated clockwise by engagement with the protruding pins 558 to 55d of the assembly member 55. Furthermore, the detection operation arm 16 is interlocked with the lever 1/I. The arm 19 rotates clockwise to a position where it detects that there is a claw 13a for preventing mistaken erasure in the reverse direction or that the tape running direction is in the reverse direction, and separates it from the claw detection member 17 and the lever 18. Therefore, when the lever 14 is set to the I mode, the mode switching member 20 rotates to the stop mode.

When the tape 13c is wound up on the take-up reel 0 and runs in the forward direction by pressing button 6C again (1), the tape 13c is wound up on the take-up reel 0 and runs in the forward direction. J: When the retape end is detected, the mode switching member 20 moves the stop mode lever 52 in the direction of the arrow Y1, similar to the end of the reproducing mode in the reverse direction of the U mode. , the lever 52 moves the lock plate 50 in the direction of the arrow x1 via the transmission member 54 to switch to the stop mode.In addition, the reproduction mode in the reverse direction in the ■mode is changed to the switching mode when the ■mode is set by the lever 14. Since the member 20 is located on the stop mode side, the stop mode is set when the tape end is detected in the reverse direction, similar to when playing in the forward direction.

In mode (2), not only in the forward and reverse playback modes but also in the recording mode, fast forward/rewind mode, and single start mode, the tape end is detected and the tape is in the stop mode regardless of the tape running direction.

29- When switching the tape running from the forward direction to the reverse direction or from the reverse direction to the forward direction during the playback mode of each of the above modes (O mode, U mode, ■ mode) or before operating the playback mode, 1st
In the figure, the manual reverse lever 35 is rotated in the direction of arrow C. The abutment lever 36 interlocked with the lever 35 moves in the direction of arrow Y1 to contact the abutment portion 38a of the switching lever 38.
By contacting the lever 38 and rotating the lever 38 counterclockwise, the tape running direction is switched to the opposite direction in the same manner as when detecting the end of the tape in the O mode playback mode described above.

In addition, in play mode and fast forward 9 rewind mode, lever 3 is pressed regardless of whether the tape running direction is forward or reverse.
The tape running direction is switched by the operation 5, but in the recording mode, when the recording button 6d is operated as shown in FIG. rotates in the counterclockwise π1 direction. Therefore, in the forward direction of the recording mode, the contact lever 36 comes into contact with the engaging portion 211 of the base 21, and when the lever 35 is operated, the t-mode switching member 20 on the t-mode switching side is switched. Contact the operating lever 38 to switch the tape running direction.Also, if there is no accidental erasure prevention claw 13a in the reverse direction of the recording mode or the forward direction of the recording mode (if the L1 mode switching unit 20 is in the stop mode side) Therefore, even if the lever 35 is operated by mistake, the tape running direction will not be changed and the mode will be set to stop.

As mentioned above, the reversible tape one-nocoder according to the present invention crosses the tape running directions of the forward direction and the reverse direction.
A repeat mode in which the head is alternately reversed while the tape is running in one direction, a reversal mode in which the tape running direction is reversed only from the forward direction to the reverse direction and the head is also reversed at the same time, and a stop mode in which the tape stops when the tape is running in one direction. A mode selection mechanism that selects one of the unidirectional modes, a mechanism that displaces depending on whether the tape running direction is forward or reverse, and a mechanism that detects the presence or absence of the Ml erasure prevention 1L claw in the reverse direction. It has a claw detection mechanism for preventing accidental erasure, and a fast-forward/rewind mode displacement mechanism that shifts depending on whether the tape running state is in fast-forward mode or rewind mode. Depending on the combination of the displacement position and the mutual engagement and abutment state of the reporter mechanisms, when the tape has finished running and reached the tape end, the head is reversed and the tape running direction is reversed to enable reverse mode or tape running. The stop mode is equipped with a mechanism that automatically selects each stop mode.
As in the past, mode selection, tape running direction, presence or absence of a claw to prevent accidental erasure on the reverse side, fast forward/rewind mode, etc. are not electrically detected via switches, but are detected by mechanical displacement of each mechanism. , it is possible to select operations such as whether to avoid reversing the head at the end of the tape or to stop tape running using mechanical logic, and the device can be manufactured at low cost without requiring electrical parts such as switches. Playback mode, forward playback in U mode, reverse direction in recording mode in U mode. Automatically switches to reverse mode when the tape end is detected only if there is a claw to prevent accidental erasure. In other cases, the tape end is reached. It has features such as being able to reliably function so as to switch to the stop mode upon detection, and reliably preventing accidents such as erroneous recording due to malfunction or erroneous operation in each mode.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the reversible tape recorder according to the present invention, Fig. 2 is a side view of the tape cassette installed, Fig. 3 is an exploded perspective view of the mode selection mechanism, and Fig. 4 is the mode selection mechanism. A front view of the switching member seen from the front side, Fig. 5 is a plan view of the drive transmission mechanism of a reversible tape recorder, Fig. 6 is a plan view of the U-mode recording mode, and Fig. 7 is a plan view of the U-mode recording mode in reverse mode. A plan view of the state in which it has been detected that there is no claw to prevent accidental erasure in the direction, Fig. 8 is a plan view of fast forward mode, Fig. 9 is a plan view of U mode playback mode, and Fig. 10 is a plan view of U mode in reverse direction. FIG. 11 is a plan view when the tape end is detected. FIG. 33- 1...Reversing tape recorder, 2...Mode selection mechanism, 3...Claw detection mechanism for preventing accidental erasure, 4...Tape running direction detection mechanism, 5...Fast forward/rewind mode displacement Mechanism, 6... Operation button, 6C... Play button, 6d... Record button, 7... Forward side take-up reel stand, 8... Reverse side take-up reel stand, 9... Forward Side capstan, 10... Reverse side capstan, 13...
Tape force set 1~. 13a... Accidental erasure prevention claw in reverse direction, 14... Mode selection lever, 15... Chassis base, 16... Detection operation arm, 17... Claw detection member, 18... Tape running direction Detection lever, 19
...Switching operation arm, 20...Mode switching member, 2
1...Support base, 22.24...Claw detection plate, 25
...Tape running direction selection rotary lever, 26...Fast forward 2 rewind mode detection lever, 30...Recording mode detection lever, 32...Recording mode lever, 33...Connecting member, 34... - Switching rod, 35... Manual reverse lever, 36... Contact lever, 38... Switching operation lever, 39... Intermittent gear, 40... Rotating lever for recording mode, 42...・Mode switching solenoid, 43...Tape end detection 34-element, 44...Rotating lever, 45...Sliding lever,
46...T-shaped arm, 48...1-shaped lever,
50...Lock plate, 52...Stop mode lever, 5
4... Transmission member, 55... Assembly member, 60... Drive motor, 66... Head, 67... Head holder. Figure 4'° View 2

Claims (1)

[Claims] A repeat mode in which the tape running direction is alternately repeated between the forward direction and the reverse direction and the head is alternately reversed, a reversal mode in which the tape running direction is reversed only from the forward direction to the reverse direction and the head is reversed, and a unidirectional tape running mode. A mode selection mechanism that selects one of the unidirectional modes, which is a stop mode when the tape ends, a mechanism that displaces depending on whether the tape running direction is forward or reverse, and a claw for preventing accidental erasure in the reverse direction. A claw detection mechanism for preventing erroneous erasure that detects the presence or absence of the data, and a fast forward/rewind mode displacement l! that changes depending on whether the tape running state is in fast forward mode or rewind mode. When the tape has finished running and reached the end of the tape, the head A reversible tape recorder characterized in that an Ifil is installed to automatically select either a reverse mode by reversing the running direction of the tape, or a stop mode for stopping the running of the tape.