JPH0240596Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a reversing type tape recorder, and in particular, a reversing operation in which the tape running direction is reversed and the head is reversed is changed to a stop mode in which the tape running is stopped depending on the tape running direction and the presence or absence of an accidental erasure prevention claw in the recording mode. An object of the present invention is to provide a reversing tape recorder configured to operate reliably at low cost by mechanically switching. Generally, in a reversible tape recorder, when a reversal operation is performed to reverse the tape running direction, the tape running direction and the presence or absence of an accidental erasure prevention claw are electrically detected by a switch or the like, and an electrical signal is supplied to an electric circuit. Therefore, when the tape is running in the reverse direction in recording mode and there is a claw to prevent accidental erasure in the reverse direction, or when the tape is running in the forward direction without the claw to prevent accidental erasure in the reverse direction, Even if you accidentally perform a reverse operation, you will be able to record again on the previously recorded forward track based on the instructions from the electric circuit, or if you erase the record on the reverse track that you want to keep without erasing it and record a new one. It was designed to prevent malfunctions. However, conventional reversing tape recorders have the drawback of high manufacturing costs because they use many expensive switches and the like. The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings. In addition, there is a repeat mode (hereinafter referred to as O mode) in which the tape running direction is alternately repeated between the forward direction and the reverse direction and the head is alternately reversed, and a repeat mode (hereinafter referred to as O mode) in which the tape running direction is reversed only from the forward direction to the reverse direction and the head is moved to the reverse side. Each mode will be explained separately: a reversal mode in which the tape is reversed (hereinafter referred to as U mode), and a unidirectional mode in which the tape is stopped when the tape ends when running in one direction (hereinafter referred to as I mode). The table below shows whether tape running is in reverse mode or stop mode in accordance with each mode along with tape end detection, and explanations will be made in accordance with the modes with reference to this table.

[Table] −〓Mode setting not possible
(1) O mode FIG. 1 is a plan view of an embodiment of the reversible tape recorder according to the present invention. In FIG. 1, the reversible tape recorder 1 has a mode displacement mechanism 97 consisting of a mode selection mechanism 2, a claw detection mechanism 3 for preventing accidental erasure, a tape running direction detection mechanism 4, a fast forward/rewind mode displacement mechanism 5, and a recording mode operation mechanism 97. It has a mechanism 98 and a tape reversing operation mechanism 99. On the front side of the reversible tape recorder 1, there are operation buttons 6 for operating each mode.
(Pause button 6a, fast forward button 6b, play button 6c, record button 6d, rewind button 6e, stop button 6f) are provided. 7 is a forward side take-up reel stand, 8 is a reverse side take-up reel stand, 9 is a forward side capstan, 10 is a reverse side capstan, 11
12 is a forward side flywheel, 12 is a reverse side flywheel, and 13 is an attached tape cassette. 14 is the mode selection lever, O mode at the tip,
Recessed part 1 for mode positioning of U mode and I mode
The concave portion 14a of 4a to 14c is fitted into the protruding pin 15a of the chassis base 15 to be in the O mode setting position. 16 is a detection operation arm, and the contact part 1
6a extends, and a claw 13a for preventing erroneous erasure in the reverse direction of the cassette 13 is provided at this abutting portion 16a.
When the recording mode is set in the absence of the tape detecting member 17, which slides in the direction of arrow _X1 , or the tape running direction detection lever 18, which moves in the direction of arrow _X1 when the tape running direction is in the reverse direction, comes into contact with the tape detecting member 17. Therefore, the detection arm 16 is rotated clockwise by 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 erroneous erasure prevention claw 13a. Reference numeral 19 denotes a switching operation arm having an engagement pin 19a at its tip and an engagement hole 19b on its 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, the detection operation arm 16, and the switching operation arm 1.
9 and a mode switching member 20. 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 a coil spring 23, and comes into contact with the claw 13a of the cassette 13 as shown in FIG. recess 1
7a to lock the claw detection member 17.
The claw detection mechanism 3 for preventing erroneous erasure is roughly composed of a claw detection member 17 and a claw detection plate 22. In addition, 2
4 is a claw detection plate in the forward direction, and the cassette 13
It comes into contact with the erroneous erasure prevention claw 13b in the forward direction and is displaced in the direction of arrow _Y1 against the coil spring 86, and the presence of the claw 13b is detected.
The tape running direction detection lever 18 has a T-shape, and an engaging part 18a having a bifurcated tip engages with an engaging part 25a of a tape running direction selection rotary lever 25 that rotates according to the tape running direction. It is provided so as to be slidable in the directions of arrows X ₁ and X ₂ . The tape running direction detection mechanism 4 is roughly composed of the detection lever 18 and the rotating lever 25. Reference numeral 26 denotes a fast forward/rewind mode detection lever, which is provided on the front side of the base 15 and is biased in the direction of arrow _X2 by the tensile force of a coil spring 85 so as to be slidable in the directions of arrows _X1 and _X2 . Further, the detection lever 26 is fitted into the recesses 27a and 28a of the fast-forwarding lever 27 or the rewinding lever 28, and is displaced in the direction of arrow _X2 . Reference numeral 29 denotes a connecting lever, which has a dogleg shape, and has an arm 29a brought into contact with the detection lever 26, and a protruding pin 29c at the tip of the other arm 29b engaged with the engagement hole 19b of the switching operation arm 19. and is supported on a shaft 15b of the shear shear base 15. The fast forward/rewind mode displacement mechanism 5 is roughly composed of the above-mentioned detection lever 26 and connection lever 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 _X1 and _X2 , and is biased in the direction of arrow _X1 by the tensile force of a coil spring 31 to set the pin 30a to the recording mode. It is fitted into the recess 32a of the lever 32. 33
is a connecting member having three projecting pins 33a to 33c, the front projecting pin 33a is engaged with the recess 30b of the recording mode detection lever 30, and the projecting pin 33b is connected to the lower surface of the mode selection lever 14. of the chassis base 15.
It is rotatably supported on a shaft 15c. The recording mode operating mechanism 98 is roughly composed of the recording mode detection lever 30, the recording mode lever 32, and the connecting member 33 described above. Reference numeral 35 denotes a manual reverse lever, which has a rotatable abutment lever 36 at its tip, is supported by a shaft 15d, and is supported by a coil spring 3.
It is urged in the direction of arrow _Y1 by the tensile force of 7 and is locked to the protruding pin 15e. In addition, contact lever 3
6 connects the elongated hole 36a to the protruding pin 33c of the connecting member 33.
The manual reverse lever 35 is engaged.
It moves in the directions of arrows Y ₁ and Y ₂ according to the rotation of . Further, the contact lever 36 in the playback mode has a contact portion 36b at the tip opposed to a contact portion 38a of a switching lever 38, which will be described later. The tape reversing operation mechanism 99, which is the essential part of the present invention, is roughly composed of the above-mentioned manual reverse lever 35 and abutment lever 36. 38 is a switching operation lever, with contact lever 3 at the tip.
6 or a contact portion 38a that the mode switching member 20 contacts, and an engaging portion 38b extending from the opposite side of the contact portion 38a, which is rotatably supported on the shaft 15g. Further, the switching lever 38 rotates clockwise to move the engaging portion 38b to the pin 3 of the partially toothed gear 39.
9a, the partially toothed gear 39 is rotated clockwise to switch the tape running direction to the opposite direction as described later. Reference numeral 40 denotes a rotary lever for recording mode, and the front engaging portion 40a is in contact with the protruding pin 30c of the recording mode detection lever 30, and the rear protruding pin 40b
A coil spring 41 mounted between the claw detection member 17 and the claw detection member 17 is hooked. Reference numeral 42 denotes a mode switching solenoid, which is energized when supplied with an electric signal from the tape end detection element 43 to rotate the rotation lever 44 counterclockwise.
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 to move the reel stands 7 and 8 while the tape is running.
is energized in the direction of _arrow
The T-shaped arm 46 is regulated in a standby state by a contact portion 45a at the tip, and a protruding pin 45b is provided on the opposite side of the contact portion 45a to come into contact with the engagement portion 44a at the tip of the rotary lever 44. Further, the T-shaped arm 46 has a pin 46a at its tip that engages with a cam 47a of the cam gear 47. Reference numeral 48 denotes an L-shaped lever, the front side of which is rotatably connected to the T-shaped arm 46, and the other side connected to the protruding pin 21 on the rear side of the support base 21.
has an engaging portion 48a that engages with the coil spring 4
It is urged to rotate clockwise by the tensile force of 9 and is rotatably supported on the shaft 15f of the chassis base 15. A lock plate 50 locks the operation button 6 pressed in the direction of arrow _Y1 in the operated state, and the coil spring 51
is energized in the direction of arrow _X by the tensile force of
It 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 mode switching member 20 on the rear side moves in the arrow Y ₁ direction, and is moved in the arrow Y ₂ direction by the tensile force of the coil spring 53. It is energized in the direction and is provided so as to be slidable in the directions of arrows Y ₁ and Y ₂ . 54 is a transmission member;
It has protruding pins 54a and 54b and is supported on the shaft 15h of the chassis base 15. Further, the transmission member 54 has a protruding pin 54a engaged with an engaging portion 50a of the lock plate 50, and a protruding pin 54b engaged with an engaging portion 52a of the stop mode lever 52. Rotate to move the lock plate 50 in the direction of arrow _X1 . As shown in FIG. 3, the mode selection mechanism 2 of the mode displacement mechanism 97, which is a main part of the reversible tape recorder according to the present invention, is assembled via an assembly member 55. Mode selection lever 14, detection operation arm 16, assembly member 55, switching operation arm 19
are coaxially and rotatably supported on a shaft 15i on the chassis base 15, respectively. The assembly member 55 has engaging pins 55a and 55b protruding from the upper surface side and engaging pins 55c and 55d from the lower surface side, and has a latching hole 55e for spring latching and an arc-shaped spring mounting portion for winding the panel. It has 55f. 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 further fits into the arc-shaped engagement holes 19c and 19d of the detection operation arm 16. 16
When the shaft 1 is stacked with the engagement pins 55c and 55d of the assembly member 55 inserted into the arc-shaped engagement holes 14d and 14e of the mode selection lever 14 and the mode selection lever 14,
Can be installed on 5i. Also, mode selection lever 1
4 is rotated clockwise by the tensile force of a coil spring 56 that is engaged with the protruding pin 14f on the upper surface side and the engagement hole 55e of the assembly member 55. The detection operation arm 16 is a spring mounting portion 55 of an assembly member 55 in which a coil spring 57 is wound around a vertical engagement hole 16d.
f is inserted, the coil spring 57 is compressed, and the elastic force of the spring 57 rotates counterclockwise, and the contact portion 16a is brought into contact with the claw detection member 17 and the tape running direction detection lever 18. ing. The switching operation arm 19 is biased to rotate counterclockwise by the tensile force of a coil spring 58 that is hooked between a protruding pin 19e on the upper surface side and a hooking hole 55e of the assembly member 55, and is rotated counterclockwise when it is engaged with the engagement pin 19a. The matching mode switching member 20 is rotated to the reverse side. In addition, as shown in FIG. 4, the mode switching member 20
is the engagement pin 1 of the switching operation arm 19 in the groove 20a.
9a is fitted, and when the arm 19 rotates clockwise, it rotates in the direction of arrow _A1 so that the contact part 20b faces the contact part 52b of the stop mode lever 52, as shown by the solid line, and stops. Located on the mode side,
Further, when the arm 19 rotates counterclockwise, the arm 19 rotates in the direction of arrow _A2 so that the contact portion 20c faces the contact portion 38a of the switching operation lever 38, as shown by the broken line, and is positioned 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, supported by a head holder 67, and has a sector gear 6 on the front side.
It has a head rotation gear 66a that meshes with the head rotation gear 66a. Reference numeral 69 denotes a head reversing lever, which has a bifurcated engaging portion 6 that engages with the end 68a of the sector gear 68 on the front side.
9a, and is rotatably supported by a shaft 74. Further, the head reversing lever 69 has a protruding pin 69b on the rear side.
b is fitted into a cam groove 76a of a head reversing cam gear 76 that meshes with a small gear 75 that is integral with the partially toothed gear 39. The gear ratio between the small gear 75 and the head reversing cam gear 76 is 1:2, and when the small gear 75 makes one revolution, the cam gear 76 makes half a revolution. The tape running direction selection lever 25 is configured such that the contact portion 25a at the tip thereof is separated from the take-up side lever 78 and brought into contact with the supply side lever 79 to select the tape winding drive system on the take-up reel side and select the tape winding drive system on the forward side. The running direction is set, and the head reversing lever 69 mentioned above
The torsion spring 80 is supported coaxially with the torsion spring 80.
The head is connected to the head reversing lever 69 via. In addition, the lever 25 is connected to the pinch roller 7 on the take-up side.
0, and a contact portion 25c that contacts the arm 73 of the pinch roller 72 on the supply side. Reference numeral 81 denotes a head pushing lever, the arm portion 81a of which is in sliding contact with the cam 82a of the partially toothed gear 82, and which presses the partially toothed gear 8 in the fast forward/rewind mode.
The head holder 6 is rotated by the arm portion 81b in conjunction with the rotation of the head holder 6.
7 is placed and fixed on the head base 83 by arrow Y ₂
Push back in the direction. 84 is an L-shaped lever, and the arm part 8
4a is in sliding contact with the cam 82b 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 in the fast forward/rewind mode. When the playback button 6c is pressed in the direction of arrow _Y1 in the O mode, the lock plate ₅₀ moves in the direction of arrow )of
It is turned ON to rotate the drive motor 60 and drive the flywheels 11 and 12. The head reversing lever 69 is rotated clockwise by engagement with the cam groove 76a of the head reversing cam gear 76, and moves the pinch roller 72 on the supply side away from the capstan 10 and moves the pinch roller 70 on the winding side away from the cassette. 13
The tape 13c is brought into pressure contact with the capstan 9 via the tape 13c, and the tape 13c is run in the forward direction. Further, the head 66 moves in the direction of arrow _Y1 together with the head base 83 to attach the tape 13c. When the tape 13c is wound onto the take-up reel stand 7 and forward playback is completed, the tape end is detected by the detection element 43. This results in
The solenoid 42 is energized to move the rotary lever 44 to 2.
Pull the sliding lever 45 as shown by the dotted chain line and rotate it counterclockwise _.
move in the direction. Therefore, the T-shaped arm 4
6 is allowed to rotate counterclockwise by separating the contact portion 45a of the sliding lever 45. The pin 4 of the T-shaped arm 46 is attached to the cam 47a of the cam gear 47.
6a is engaged, and together with the counterclockwise rotation of the cam gear 47, the L-shaped lever 48 is rotated counterclockwise as shown by the two-dot chain line. L-shaped lever 48
moves the support base 21 in the direction of arrow _Y1 to bring the contact portion 20c of the mode switching member 20 into contact with the switching actuation lever 38. As a result, the lever 38 is rotated counterclockwise and the pin 39a of the partially toothed gear 39 is rotated.
kick and push to rotate the partially toothed gear 39 clockwise. Therefore, the toothless gear 39 has a toothless portion 39b.
is shifted from the position facing the drive gear 91, and the toothless gear 39 and the drive gear 91 mesh with each other, and the toothless portion 3 is again engaged.
9b rotates once until it faces the drive gear 91. The cam 39c integrated with the partially toothed gear 39 rotates the head pushing lever 81 counterclockwise by a predetermined angle.
Therefore, the lever 81 uses the arm portion 81b to move the head base 83 in the direction of arrow _Y2 .
3 is pushed back in the direction of arrow _Y2 to the magnetic head rotating position. The cam gear 76 that meshes with the small gear 75 of the partially toothed gear 39 rotates approximately 180 degrees during one revolution of the partially partially toothed gear 39 due to the gear ratio with the small gear 75. 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 from the outer circumference side to the center side cam groove 76a as the cam gear 76 rotates counterclockwise. and rotates clockwise about the shaft 74. Further, the engaging portion 69a of the head reversing lever 69 engages with the protruding pin 68a of the sector gear 68 to rotate the sector gear 68 clockwise, and together with the gear 66a, the head 66 is rotated by half a turn within the head holder 67 to enter the reverse mode. Switch to . 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 reverse side lever 79 and comes into contact with and pushes the forward side lever 78.
The lever 78 rotates counterclockwise against the tensile force of the spring 78a to further distance the transmission gear 92 from the forward side take-up reel stand 7 and the gear 93. Further, the lever 79 on the reverse side, which has been released from the restriction of the engaging portion 25a, rotates counterclockwise by the tensile force of the spring 94, and the gear 96 engages the transmission gear 95 with the take-up reel stand 8 on the reverse side. The pulley 65 is meshed with a gear 65a integral with the pulley 65 to form a reverse direction tape winding drive system. In addition, the lever 25 is rotated clockwise to bring the abutting portion 25b into contact with the arm 71, so that the arm 71
is rotated counterclockwise, and the contact portion 25c is separated from the arm 73. For this reason, the pinch roller 70 on the forward side is spaced apart from the capstan 9. The arm 73 on the reverse side rotates counterclockwise to press the pinch roller 72 onto the capstan 10 on the reverse side via the magnetic tape 13c. When the cam 39c of the partially toothed gear 39 rotates once, the lever 81 rotates clockwise, and the head base 83 moves in the direction of arrow _Y1 . The head 66 returns to the recording/reproducing position after rotating half a turn toward the reverse side, and attaches to the tape 13c. Therefore, the tape 13c reproduced on the reverse side track by the head 66 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. Further, when the tape 13c is wound on the reverse side take-up reel stand 8 and the reproduction mode in the reverse direction ends,
The tape end is detected again by the detection element 43, and the tape running direction is automatically switched from the reverse direction to the forward direction again by the same operation as when the tape running direction was switched from the forward direction to the reverse direction. Therefore, in the O mode reproduction mode, reproduction is repeated alternately in the forward direction and in the reverse direction. Next, in the O mode, press the record button 6d in the direction of arrow _Y1 to operate the record mode, and as shown in FIG.
0 and is locked by the lock plate 50 at the operating position, thereby moving the recording mode detection lever 30 in the direction of arrow _X2 . Lever 3 of recording mode operation mechanism 98
0 rotates the connecting member 33 clockwise and moves the switching rod 34 in the direction of arrow _Y2 . Further, the contact lever 36 of the tape reversing operation mechanism 99 that engages with the connecting member 33 rotates counterclockwise in conjunction with the displacement of the recording mode operation mechanism 98, and the contact lever 36 at the tip end
6b is opposed to the engaging portion 21b of the base 21.
Therefore, the mode selection lever 14 is mechanically rotated in the direction of arrow B by the movement of the rod 34, and the recess 14b is fitted into the pin 15a, and the mode is changed from the O mode to the U mode.
mode. Therefore, even if the recording mode is operated in the O mode, the recording mode is automatically switched to the U mode, thereby preventing malfunctions such as those caused by repeated recording on the forward and reverse tape tracks that have been recorded once, as will be described later. be done. In addition, if the O mode is switched to the recording mode and there is no reverse direction erroneous erasure prevention claw 13a, the lever 30 and rod 34 act as shown in FIG. 7 to prevent erroneous erasure in the U mode. Claw 1
3a is automatically switched to a state in which no tape is present, and the stop mode is entered upon detection of the tape end in the forward direction, as will be described later. In addition, when operating the fast forward/rewind mode in O mode, for example, the fast forward button 6b is pressed as shown in FIG.
By pressing in the direction of arrow _Y1 , the fast forward mode lever 27 is locked by the lock plate 50 at the operating position. Along with this, the fast forward/rewind mode detection lever 26 moves in the direction of arrow _X1 . Therefore,
The connecting lever 29 is rotated counterclockwise to rotate only the switching arm 19 of the mode selection mechanism 2 clockwise. That is, the mode switching member 20 rotates to the stop mode side, and the base 21 moves in the direction of arrow _Y1 in the same way as when switching the tape running direction by detecting the tape end, whether the tape running direction is forward or reverse. The contact portion 52 of the mode lever 52 stops the contact portion 20b.
b and move the stop mode lever 52 in the direction of arrow Y ₁
move in the direction. Therefore, by moving the stop mode lever 52 in the direction of arrow _Y , the transmission member 5
4, the lock plate 50 is moved in the direction of arrow _X1 to release the fast-forward mode lever 27 from the operating position and return the fast-forward button 6b to its original position.
Also, a moving lever (not shown) that moves the head base 67 in the _Y1 direction in conjunction with the movement of the lock plate 50 in the _X1 direction is released, and the head 66 is moved together with the head holder 83 in the _Y1 direction. and reaches the stop mode position. Although the fast forward mode has been described in the above description, the same operation as in the fast forward mode also occurs in the rewind mode and the so-called cue mode in which recorded songs are fast forwarded and searched. In addition, during fast forward/rewind mode, it is not limited to O mode, but also U mode and I mode.
In the same way as described above, the stop mode is switched to the stop mode when the tape end is detected, regardless of whether the tape running direction is forward or reverse. In addition, in O mode, you can operate the lever 14 to enter playback mode or record mode, in fast forward/rewind mode, to U mode or I mode, or in U mode or I mode, to playback mode, or from U mode in fast forward/rewind mode. to O mode, from U mode to I
mode or from I mode to U mode. However, in the case of recording mode, it is possible to switch from U mode to I mode or from I mode to U mode, but when switching from U mode to O mode, the lever 14 moves the rod 34 in _{the two} directions of arrow Y. Since the switch is rotated from the O mode position to the U mode position, switching operations cannot be performed and erroneous operations are reliably prevented. (2) U mode As shown in FIG. 9, when the mode selection lever 14 is rotated in the direction of arrow B to fit the recess 14b into the pin 15a, the mode selection mechanism 2 is set to the U mode. When the playback button 6c is pressed in the direction of arrow _Y1 to operate the playback mode in the forward direction, the tape 13c is wound on 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 mode switch is rotated to the mode switching side in the same way as in the above-mentioned O mode playback mode. As the member 20 moves in the direction of the arrow _Y1 , the switching lever 38 rotates counterclockwise, causing the head 66 to rotate by half a rotation and switching the tape drive system to the reverse direction. Therefore, the first
As shown in the figure, the tape running direction selection rotary lever 2
5 rotates clockwise to move the tape running direction detection lever ₁₈ in the direction of arrow let Since the mode selection lever 14 is in the U mode position, when the arm 16 rotates clockwise, the switching operation arm 19 rotates clockwise due to engagement with the protruding pins 55a to 55d of the assembly member 55. Therefore, the mode switching member 20 is rotated to the stop mode side, and the contact portion 20b is moved to the stop mode lever 5.
2 and facing the contact portion 52b of No. 2. 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 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 direction of arrow _Y1 with the movement of the base 21, and moves the lock plate 50 in the direction of arrow X via the transmission member 54. to cancel playback mode and switch to stop mode. That is, at the end of the forward playback, the tape running direction is switched 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 U mode and there is a claw 13a for preventing accidental erasure in the reverse running direction,
I will explain about it. When the playback 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
Rotate 0 clockwise. However, since the claw detection plate 22 moves in the direction of the arrow _Y1 to detect the presence of the claw 13a, the movement of the claw detection member 17 in the direction of the arrow _X1 is restricted by engagement with the pin 22a. Therefore, the displacement of the rotating lever 40 is absorbed by the tension of the coil spring 41. That is, the mode selection mechanism 2 operates in the same manner as in the U mode playback mode described above, 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. However, when the tape 13c is wound in the reverse direction and the recording mode ends, the mode is switched 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, the play button 6c and the record button 6d
When pressed, the rotating lever 40 rotates 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 pin 22a is separated 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 tension of the coil spring 41 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 rotated via the arm 19 in the same way as when the tape running direction in the U mode playback mode is the reverse direction.
is rotated to the stop mode side. That is, tape 1 is recorded in forward recording mode.
3c is wound on the forward side take-up reel stand 7 and the end of the tape is detected, and the mode switching member 20 moves the stop mode lever 52 in the direction of arrow _Y1 to set the stop mode. Therefore, malfunctions such as erroneously recording new data on a tape track in the reverse direction can be prevented. (3) I mode As shown in FIG. 11, rotate the mode selection lever 14 in the direction of arrow B to align the recess 14c with the pin 15a.
When fitted, the mode selection mechanism 2 is set to I mode. Since the mode selection lever 14 is in the I mode position, the switching operation arm 19 is
It rotates clockwise by engagement with the protruding pins 55a to 55d of No.5. Further, the detection operation arm 16 is rotated clockwise together with the arm 19 in conjunction with the lever 14 to a position where it detects that there is a claw 13a for preventing accidental erasure in the reverse direction or that the tape running direction is in the reverse direction. It is separated from the claw detection member 17 and lever 18. For this reason, lever 1
Mode switching member 2 along with the setting of I mode by 4.
0 rotates to the stop mode side. When the playback button 6c is pressed to operate the playback mode in the forward direction, the tape 13c is wound on the take-up reel stand 7 and runs in the forward direction. When the tape end is detected by the detection element 43 after the playback in the forward direction ends, the mode switching member 20 moves the stop mode lever 52 to
Y Move in _one direction. Therefore, when the tape end is detected, the lever 52 moves the lock plate 50 in the direction of the arrow X via the transmission member 54 to switch to the stop mode. In addition, in the reverse playback mode in the I mode, since the switching mode member 20 is located on the stop mode side at the same time as the I mode is set by the lever 14, the stop mode is activated by detecting the tape end in the reverse direction in the same way as when playing in the forward direction. Become. In the I mode, not only in the forward and reverse playback modes but also in the recording mode, fast forward/rewind mode, and cue mode, the tape end is detected and the tape enters the stop mode regardless of the tape running direction. 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, I mode) or before operating the playback mode, please refer to Figure 1. In the middle, rotate the manual reverse lever 35 in the direction of arrow C. The contact lever 36 interlocked with the lever 35 moves in the direction of arrow _Y1 and comes into contact with the contact portion 38a of the switching lever 38, and the lever 38 is rotated counterclockwise, thereby reproducing the O mode described above. The tape running direction is switched to the opposite direction with the same operation as when detecting the tape end in mode. In addition, in the playback mode, fast forward, and rewind mode, the contact portion 36b of the contact lever 36 is opposed to the contact portion 38 of the lever 38, so whether the tape running direction is forward or reverse, operation of the lever 35 The tape running direction is switched. However, in the recording mode, as shown in FIG.
When d is operated, the lever 30 moves in the direction of arrow _X2 , and the contact lever 36 rotates counterclockwise via the interlocking member 33 to face the engaging portion 21b of the base 21. In the forward direction of the recording mode, by rotating the manual reverse lever 35 in the direction of arrow C, the mode switching member 20 located on the reverse mode side is brought into contact with the contact portion 38a of the switching actuation lever 38, and the tape running direction is changed to the reverse direction. Switch.
In addition, when the recording mode is in the reverse direction, the arm 16 is rotated clockwise by moving the lever 18 in the direction of the arrow _X1 shown by the two-dot chain line in FIG. Claw 13
If there is no a, the claw detection member 1 is removed as shown in Fig. 7.
7, the arm 16 is rotated _clockwise by moving in the direction of arrow mode. Therefore, in the recording mode described above, when there is a claw to prevent accidental erasure in the reverse direction and the tape is running in the reverse direction, or if there is no claw to prevent accidental erasure in the reverse direction and the tape is running in the forward direction. If you operate the lever 35 by mistake, you may end up recording again on the previously recorded forward track, or you may end up erasing and rerecording the reverse track that you want to keep without erasing it. Malfunctions are reliably prevented. As mentioned above, the reversing tape recorder of the present invention has a mode displacement mechanism that is displaced depending on whether the tape running direction is forward or reverse, or whether there is an erasure prevention claw in the reverse direction, and a mode displacement mechanism that is operated to change the tape running direction. a tape reversing operation mechanism that reverses the direction; and a recording mode operation mechanism that is operated to set the tape reversal operation mechanism to a recording mode and engage the tape reversal operation mechanism with a mode displacement mechanism,
In the recording mode, the mode displacement mechanism has a claw to prevent accidental erasure in the reverse direction, and the displacement position is when the tape is running in the reverse direction, or there is no claw to prevent accidental erasure in the reverse direction, and the tape running direction is in the forward direction. When the tape is in the state displacement position, operating the tape reversing operation mechanism switches the mode displacement mechanism to the stop mode in which the tape end is detected and stops the tape, and in other modes than the above, the tape reversing operation mechanism is operated. The structure is configured so that the tape running direction is then switched to a reversal mode in which the tape running direction is reversed, so for example, each detection switch functions by engaging and abutting with mechanical displacement without using many expensive switches as in the past. It is possible to reduce the manufacturing cost of the device by reducing the number of electrical parts such as , etc., and each mechanism such as the mode displacement mechanism, tape reversing operation mechanism, recording mode operation mechanism, etc. is interlocked to reverse the tape running direction according to the selected mode. This can reliably prevent malfunctions caused by accidentally recording while in recording mode, especially when the tape running direction is reverse in recording mode, or if switching to a tape running direction that does not have a claw to prevent accidental erasure. Even if the tape is running in the forward direction, it can reliably switch to the stop mode without reversing the tape running direction, thereby preventing malfunctions such as recording again on the tape track in the forward direction or erasing records that should be kept. have

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the reversible tape recorder of 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, Figure 5 is a plan view of the drive transmission mechanism of the reversible tape recorder, Figure 6 is a plan view of the U-mode recording mode, and Figure 7 is 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, and FIG. 11 is a plan view in the I mode reproduction mode. 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...Playback 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 cassette, 13a...
Reverse direction mistaken erasure prevention claw, 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, 21...Support base, 22, 24...Claw detection plate, 25...Tape running direction selection rotary lever, 26...Fast forward, rewind mode detection lever, 30...Recording mode detection Lever, 32... Recording mode lever, 33... Connection 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 ... Solenoid for mode switching, 43 ... Tape end detection element, 44 ...
...Rotating lever, 45...Sliding lever, 46...T
Shaped arm, 48... L-shaped lever, 50... Lock plate, 52... Stop mode lever, 54... Transmission member, 55... Assembly member, 60... Drive motor, 66... Head, 67... Head holder , 9
7...Mode displacement mechanism, 98...Record mode operation mechanism, 99...Tape reversal operation mechanism.

Claims (1)

[Scope of utility model registration request] a mode displacement mechanism that is displaced depending on whether the tape running direction is a forward direction or a reverse direction or whether there is a claw for preventing accidental erasure in the reverse direction; a tape reversing operation mechanism that is operated to reverse the tape running direction; a recording mode operation mechanism that sets the tape to a recording mode and engages the tape reversing operation mechanism with the mode displacement mechanism; If the tape is running in the reverse direction, or if there is no reverse erase prevention claw and the tape is running in the forward direction, operating the tape reversing mechanism will cause the mode to shift. A reversing device configured to switch to a stop mode in which the tape is stopped by performing an operation when detecting a tape end through a mechanism, and in a mode other than the above, to switch to a reversing mode in which the tape running direction is reversed when the tape reversing operation mechanism is operated. type tape recorder.