JPS6152535B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive mechanism for a tape recorder equipped with an auto-stop mechanism, in which the auto-stop mechanism operates during fast forwarding and rewinding even when a pause lever is operated. The structure is such that the auto-stop mechanism does not operate even when the take-up reel stand stops, and during fast forwarding or rewinding, the take-up reel stand applies rotational force to the auto-stop lever to operate the auto-stop mechanism. To provide a drive mechanism for a tape recorder in which a pause state is not released.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a chassis, 2 is a guide pin 1 on the chassis 1
An erasing head 2a and a recording/reproducing head 2b are attached to a head stand which moves back and forth while being guided by stopper pins 1b and 1b (this pin 1b also serves to position the cassette).
The head stand has a guide slot 2c into which the pin 1a is inserted, a guide slot 2c into which the pin 1b is inserted, and a stopper slot 2d into which the pin 1b is inserted.
A lock elongated hole 2e is bored through which an upright piece 7c of a lock plate 7, which will be described later, is inserted. Further, 1c is a pin for positioning the cassette. Reference numeral 3 denotes a pinch roller unit equipped with a pinch roller 3a, which is rotatably supported on a support pin 1d implanted in the chassis 1, and is supported by a spring 3b.
The pinch roller 3a is biased toward a capstan 4a, which will be described later. Further, the unit 3 is formed with a protrusion 3c that comes into contact with the head stand 2, and an extension piece 3d that comes into contact with a protrusion 20a of the set plate 20, which will be described later. Reference numeral 4 denotes a first flywheel that is supported by a bearing (not shown) formed on the chassis 1 and a presser plate 5 (see FIG. 2) attached to the back of the chassis 1, and its rotating shaft is connected to the capstan. 4a
It is becoming. 6 is a second flywheel pivotally supported by a bearing (not shown) formed in the chassis 1;
Reference numeral 7 denotes head stand lock plates (3rd and 4th) through which a pin 1e installed on the back surface of the chassis 1 is penetrated and which is biased upward by a spring 7a.
As shown in the figure, the engaging portion 7b is engaged with a long hole 1f bored in the chassis 1, and is rotated about this hole 1f. Further, this head stand lock plate 7 is formed with an upright piece 7c projecting from the elongated hole 1g of the chassis 1, and has an engaging pawl 7d that engages with the lock elongated hole 2e drilled in the head stand 2, A protruding piece 7e protruding from the elongated hole 2e is formed.

Now, in FIG. 4, when the cassette 8 is set, the protruding piece 7e is pushed down by the cassette 8 against the spring force of the spring 7a.
The engaging claw 7d is disengaged from the lock elongated hole 2e of the head stand 2, and the head stand 2 is moved forward by a spring (not shown), that is, in the right direction in FIGS. In the figure, it moves upward.

Reference numeral 9 denotes a supply reel stand rotatably supported by the chassis 1, and a gear 9a is formed on the outer periphery. 10 is a shaft (not shown) installed in the receiving plate 5
As shown in FIG. 5, a gear 10a is formed on the upper outer periphery of the take-up reel stand, and a rubber roller 10b is fixed to the lower part of the take-up reel stand. A belt groove 10e into which the winding belt 12 fits is formed between the belt 11 and the counter 11. This take-up reel stand 1
0 is fitted into a bearing 13 that is supported by the shaft of the receiving plate 5, and between this bearing 13 and the take-up reel stand 10, a first arm 14 and a second arm 15 for end detection are installed.
is inserted. A projection 14a formed on the first arm 14 is fitted into a long hole 15a formed in the second arm 15. Further, a resilient spring 16 is interposed between the first and second arms 14 and 15.

Now, when the take-up reel stand 10 rotates, the first arm 14 is pressed against the take-up reel stand 10 side by the resilient spring 16, and the second arm 15 is pressed against the bearing 13 side. First and second arms 1
4 and 15 are applied with rotational force in the same rotational direction. Note that the first arm 14 is formed with a bifurcated piece 14b that engages with a protrusion 32a of an auto-stop lever 32, which will be described later.

Reference numeral 17 denotes a take-up unit, with one end of a lever 17a being pivotally supported by the chassis 1, and a take-up pulley 17b being pivotally supported approximately at the center. Rotating shaft 17 of this take-up pulley 17b
c protrudes from the lever 17a and can come into sliding contact with the rubber roller 10b of the take-up reel stand 10 described above. Further, an engagement protrusion 17d is formed at the tip of the take-up lever 17a, and the engagement protrusion 17d comes into contact with a contact front edge 20c of a set plate 20, which will be described later. The lever 17a is rotated clockwise. That is, the engaging protrusion 17d is pressed toward the abutting front edge 20c of the set plate 20.
18 is a motor, and a belt 19 is wound around the pulley 18 via a take-up pulley 17b, a second flywheel 6, and a first flywheel 4. Reference numeral 20 designates a set plate slidably provided on the chassis 1, into which a protruding piece 20a that comes into contact with the extension piece 3d of the pinch roller unit 3 mentioned above when the cassette is attached, and one end of a lever arm described later are inserted. The notch 20b and the engaging protrusion 17 of the take-up unit 17 described above
A contact front edge 20c that is always in contact with d and a contact rear edge 2 that is always in contact with a cam plate 29c that will be described later.
0d is formed. The set plate 20 is always biased forward by a spring 21. or biasing arm 22
The other piece is always in contact with the cam plate 29c. 2
4 is a chassis 1 that pivotally supports a first gear 25, which will be described later.
When the urging arm 22 is rotated counterclockwise, one end of the control lever comes into contact with the hanging piece 22a and is rotated clockwise. At this time, the other end contacts the auto-stop lever 32 and rotates the lever 32 counterclockwise.

Reference numeral 25 denotes a first gear bearing on the chassis 1, and as shown in the back view of FIG. 9, an eccentric circular groove 25a is formed on the lower surface of the first gear.
A cam base 25b and a protrusion 25c are formed approximately in the center. The protrusion 25c is the eccentric cam base 25b.
It is formed so as to be located concentrically with the middle of the narrowest groove portion 25a ₁ formed by the outer peripheral wall of the eccentric circular groove 25a. 26 is a pulley 27 bearing on the chassis 1
The second gear is fixed to the rotating shaft 27a and is meshed with the first gear 25. Furthermore, pulley 2
A belt 28 is wound between the belt 7 and a pulley 4b provided on the rotating shaft of the first flywheel 4. Therefore, when the first flywheel 4 is rotated, the first gear 25 is rotated via the second gear 26.

29 is pivotally supported by the chassis 1, and the second gear 2
The third gear that meshes with the second gear 26 has two notches 29a that are not meshed with the second gear 26. Further, the upper surface of this third gear 29 has cam teeth 2.
9b and the cam plate 29c are integrally formed.
A lock arm 30 is pivotally supported by the chassis 1 and is engaged with the cam teeth 29b, and the engagement is released when the solenoid 31 is energized and attracted.

Reference numeral 32 designates an auto-stop lever whose one end is pivotally connected to a stop lever 45 to be described later, and a protrusion 32a provided on the lower surface of the auto-stop lever approximately in the center is engaged with the bifurcated piece 14b of the first arm 14. Further, a three-moon-shaped engagement protrusion 32b formed at the tip faces into the eccentric circular groove 25a of the first gear 25. Note that the auto-stop lever 32 has a shoulder portion 32c at its tip that engages with the release protrusion 25d of the first gear 25.
is formed.

9, when the take-up reel stand 10 rotates in the tape winding direction, that is, in the direction of the arrow, the first arm 14 is pressed against the take-up reel stand 10 by the resilient spring 16. , the first arm 14 is also applied with a rotational force in the direction of the arrow. Therefore, the auto-stop lever 32, whose protrusion 32a is engaged with the bifurcated piece 14b, is given a clockwise rotational force. As a result, the engagement protrusion 32b
It is in a state along the outer peripheral wall of the eccentric circular groove 25a of the gear 25. Also, when the take-up reel stand 10 supplies the tape, that is, rotates in the opposite direction to the arrow, the first
Since the arm 14 is applied with a rotational force in the opposite direction, the auto-stop lever 32 is applied with a rotational force in the opposite direction, and therefore the engagement projection 32 is applied with a rotational force in the opposite direction.
b is in a state along the outer peripheral wall of the cam stand 25b. In any of the above cases, when the tape stops running and the take-up reel stand 10 stops rotating, the first arm 14 becomes free, so the biasing force applied to the auto-stop lever 32 is also removed. It disappears. Therefore, the first gear 25 rotates and the engagement protrusion 3
After passing through the narrowest groove portion _25a1 , the groove 2b is located on the trajectory thereof, and therefore is engaged with the protrusion 25c located on the trajectory. As a result, the auto stop lever 3
2 is pulled up, the shoulder portion 32c is connected to the first gear 2.
The engagement protrusion 32 is brought into contact with the release protrusion 25d of No.5.
b is disengaged from the protrusion 25c.

33 is a play arm whose approximately center is pivotally supported by the chassis 1, and a roller 33a is provided at one end.
This corresponds to the cam plate 29c of the third gear 29 described above. Further, a spring 33c is stretched between the other end of the play arm 33 and the chassis 1, and applies a rotational force to the play arm 33 in a counterclockwise direction. Therefore, the roller 33a is always in contact with the cam plate 29c. Further, the other end of the play arm 33 corresponds to a control rod 2f projecting from the lower surface of the head stand 2.

When the cassette 8 is mounted, the cassette stand 2 moves forward for the reasons described above, and the control rod 2f comes into contact with the play arm 33 and stops. This state is the standby state. When a play lever 44 (described later) is pressed, the solenoid 31 is energized and the lock arm 3 is
0 is aspirated. As a result, the engagement between the lock arm 30 and the cam teeth 29b is released, and the cam plate 29c comes into contact with the set plate 20 (which is constantly pulled forward (downward in FIGS. 1, 7, and 8) by the spring 21). It is slightly rotated by the rear edge 20d. As a result, the notch 29c of the third gear 29, which was in a position facing the second gear 26, is displaced, and the third gear 29 and the second gear 26 are therefore meshed, and the next notch 29a is connected to the second gear 26. 3rd until facing
Gear 29 is rotated. When the gear 29 is rotated, the roller 33a of the play arm 33 moves against the cam plate 29c.
The play arm 33 is rotated clockwise by being brought into contact with the large diameter portion of the play arm 33, so that the head stand 2 is further advanced to the playback or recording position. From this state, when the stop lever 45 is pressed and the solenoid 31 is energized again, the engagement between the lock arm 30 and the cam teeth 29b is released, and the play arm 33 is now rotated slightly by the roller 33a. As a result, the third gear 29 is brought into mesh with the second gear 26, and the third gear 29 is rotated. Accordingly, the roller 33a comes into contact with the small diameter portion of the cam plate 29c, and the play arm 33 is rotated counterclockwise to move the head stand 2 to the waiting position.

Reference numeral 34 denotes a fast-forwarding unit pivotally supported by the chassis 1, and a gear 34a is provided on its upper surface to selectively mesh with the gear 9a of the supply reel stand 9 or the gear 10a of the take-up reel stand 10. The gear 34a is fitted onto the upper end of a rotating shaft that is pivotally supported by the rapid feed unit 34, and the lower end of the rotating shaft is selectively brought into contact with the first and second flywheels 4, 6. A rubber roller 34b is fitted. Further, the fast-forwarding unit 34 is provided with a protrusion 34c on the side that comes into contact with a fast-forwarding arm 35, which will be described later, and a protrusion 34d, which is engaged with a slide lever 38, which will be described later.

Reference numeral 35 denotes a fast-forwarding arm pivotally supported at the tip of a fast-forwarding lever 47, which will be described later, and springs 36 and 37 are stretched between the chassis 1 and the fast-forwarding unit 34. Further, the fast forward arm 35 has an upright piece 35a that comes into contact with the tip of a rewind lever 48, which will be described later.
is formed and the bent portion 4 of the fast-forwarding lever 47
A hanging piece 35b that comes into contact with 7c is formed.

Numeral 38 is a slide lever having one end 38a guided by a guide pin implanted in the chassis 1 and a guide piece 38b at the other end guided by a groove (not shown) bored in the chassis 1. A step portion 38c that comes into contact with the protrusion 34d, and a projecting piece 38 that comes into contact with the hanging piece 33b of the play arm 33.
d is formed. Furthermore, the slide lever 38
A spring force is always applied to the front (downward in the figure) by a spring 39.

When the fast-forward lever 47 is pressed, the fast-forward arm 35 has its hanging piece 35b pressed against the fast-forward lever 4.
It moves forward while being in contact with the bent portion 47c of No. 7. This causes the rapid feed arm 35 to move to the rapid feed unit 34.
The fast forward unit 34 is rotated clockwise. Therefore, the rubber roller 34b
comes into contact with the first flywheel 4, and the gear 34a meshes with the gear 10a of the take-up reel stand 10, so that the take-up reel stand rotates at high speed and rapidly feeds the tape. On the other hand, when the rewind lever 48 is pushed, the upright piece 35a of the fast-forward arm 35 moves to the rewind lever 48.
and is rotated clockwise against the spring force of the spring 36. As a result, the rapid feed unit 34 is rotated counterclockwise by the spring force of the spring 36. Therefore, the rubber roller 34b comes into contact with the second flywheel 6, and the gear 3
4a is meshed with the gear 9a of the supply reel stand 9, so the supply reel stand 9 rotates at high speed and rewinds the tape.

Reference numeral 40 is a lever arm whose substantially center portion is pivotally supported by a support pin 1d of the chassis 1, one end is pivotally supported by a play lever 44 which will be described later, and the other end faces into the notch 20b of the set plate 20. Note that the lever arm 40 is constantly applied with a counterclockwise rotational force by a spring 41.

42 is a pause lever guided by a guide groove 42a, and the above-mentioned support pin 1d is attached to the tip.
The cutout groove 42b is formed to avoid this.
The pause lever 42 is engaged with and detachable from a pause lever lock plate 43 that is embedded in the chassis 1 and is pivotally supported by a pin that passes through the groove 20f of the set plate 20. That is, once the pause lever 42 is pressed, the rod 42 is pressed against the lock plate 43.
This is a known method in which the lock plate 43 and the protrusion 42c are disengaged and returned to their original positions when the lock plate 43 and the protrusion 42c are held in an engaged and pressed state and pressed again.

44 is a play lever having two lock pieces 44a and 44a'; 45 is a lock piece 45a;
A spring force is always applied to the stop lever guided by the guide groove 45b toward the front (downward in the figure) by a spring 46.
47 has a lock piece 47a and a guide groove 47
The fast-forwarding lever 48, guided by b, has a locking piece 48a, and is a rewinding lever guided by a guide groove 48b.
The tip of 8 and the tip of the fast forward lever 47 are in contact with an auxiliary lever 49. This auxiliary lever 49 and the fast forward and rewind levers 47 and 48
A spring force is always applied to the front (downward in the figure) by springs 50 to 52.

53 has a lock piece 53a, and the guide groove 5
A spring force is always applied to the recording lever guided by the lever 3b toward the front (downward in the figure) by a spring 54. Although not shown, each lever 42, 44, 47, 48, 5
3 is supported between the chassis 1 and a guide plate (not shown) at the rear of each lock piece, and therefore, the other levers except the play lever 44 are supported at two places, the guide groove and the guide plate, and are aligned in a straight line. It's starting to move.

Reference numeral 56 denotes a track distance detection lever that is supported pivotally on a pin 1i that is implanted in the mounting piece 1h bent downward on the side surface of the chassis 1, and 57 is pivotally supported on a pin 1j that is implanted on the mounting piece 1h. A clockwise rotational force (see FIG. 12) is constantly applied to the lock plate by a coiled spring 58. One end of the lock plate 57 is engaged with a projecting piece 56a of the song interval detection lever 56, and the other end is a claw 57 that engages with one end 59a of a control plate 59 that controls the rotation of a third lock plate 76, which will be described later.
a is formed. Further, the lower tip 56b of the song interval detection lever 56 is in contact with one end of the control plate 59. This control plate 59 is applied with a spring force by a coiled spring 60 in a clockwise direction (FIG. 19), that is, one end is pressed against the lower tip 56b of the song interval detection lever 56, and the other end is pressed against the third lock plate. 76.

When the song interval detection lever 56 is rotated in FIGS. 11 and 12 (clockwise in FIG. 12 (two-dot chain line)), the lower tip 56b touches the control plate 5
9 is rotated counterclockwise (FIG. 19) against the spring force of the coil spring 60. At the same time, the protrusion 56a of the lock plate 57 moves, so that the coiled spring 58
A rotational force in the clockwise direction (FIG. 19) is applied by the spring force. Therefore, the claw 57a of the lock plate 57
is initially in contact with the control plate 59, but the control plate 5
As the lock plate 9 rotates, one end of the control plate 59 is positioned above the pawl 57a, so that the pawl 57a of the lock plate 57 and the control plate 59 are engaged and locked by the spring force of the coil spring 58. On the other hand, to release the lock, by returning the song interval detection lever 56, the protrusion 56a rotates the lock plate 57 counterclockwise against the spring force of the winding spring 58. will be removed.

Reference numeral 60 denotes an eject lever that is pivotally supported by a pin 1l that is implanted in a mounting piece 1k that is bent downward on the side surface of the chassis 1, and 61 is pivotally supported by a pin 1m that is also implanted in the mounting piece 1k. When using the sub-edge lever 60 as a sub-edge Projection piece 6 of electric lever 61
1a, the lever 61 is similarly rotated to the right against the spring force of the coiled spring 63. As a result of this rightward rotation, the engaging rod 64a of the lid 64 covering the cassette portion, which had been engaged with the hook portion 61b, is released. Therefore, the lid 64 is opened. Further, as the ejector lever 60 rotates, the lever 60 comes into contact with an auxiliary plate 65 attached to the head stand 2, moves the auxiliary plate 65 to the right, and thus moves the head stand 2.
Return to the initial position. As a result, the protruding piece 7e of the head stand lock plate 7 locks into the lock elongated hole 2 of the head stand 2.
The engaging claw 7d protrudes further from the locking hole 2e, and by the operation of one end thereof, the engaging claw 7d is engaged with the lock elongated hole 2e, thereby locking the head stand 2 at the initial position.

Reference numeral 66 denotes an auto-repeat lever pivotally supported by a pin 10 implanted in a mounting piece 1n bent downward on the side surface of the chassis 1, and 67 also represents the mounting piece 1.
A spring 68 is tensioned between the auto repeat lever 66 and the repeat lock plate 67, and the protrusion 66 of the auto repeat lever 66
a and the bent piece 67a of the repeat lock plate 67 are always in contact with each other. Reference numeral 69 is interposed between the chassis 1 and the head stand 2 and extends in the front-rear direction (first
The repeat slide lever is movable in the left-right direction in FIGS. 3 to 15, and a spring force is always applied rearward (rightward in the figures) by a spring 70. A hanging piece 69a is formed on the right side of this repeat slide lever 68, and a locking rod 69b is installed in this hanging piece 69a.

When the auto repeat lever 66 is pushed forward (to the left in the figure), the lever 66 comes into contact with the protrusion 69c of the repeat slide lever 69, moving the lever 69 to the left. Further, when the auto repeat lever 66 rotates, the repeat lock plate 67 is also rotated in the same direction by the spring 68, so that the lock rod 69b is engaged with the engagement recess 67b of the repeat lock plate 67, and the repeat slide lever is rotated. 69 is held in a moving state. On the other hand, when the auto repeat lever 66 is returned to the rear (to the right in the figure), the protruding piece 66a pushes the bent piece 67a, so the repeat lock plate 67 is rotated in the same direction as the auto repeat lever 66, and is therefore engaged. The recess 67b separates from the locking rod 69b. As a result, the repeat slide lever 69 is moved to the right by the spring 70 and returned to its original position.

In FIG. 16, 71 is a substantially F-shaped reel stand stop plate with one end pivotally supported on the chassis 1, and the extension piece 3d of the pinch roller unit 3 described above is attached to the other end.
A pin 71a that comes into contact with is provided. A spring 72 is stretched between the pin 71a and the chassis 1, and acts so that the pin 71a is always in contact with the extension piece 3d. Furthermore, a tooth portion 71b that can mesh with the gear 10a of the take-up reel stand 10 is formed at the top of the reel stand stop plate 71. Therefore, if the ejector lever 60 is operated now, the head stand 2 will move backward, and the pinch roller unit 3 will move back.
When the unit 3 is rotated clockwise, the pin 71a is pushed by the extension piece 3d of the unit 3. Therefore, the teeth 71b of the reel stand stop plate 71 mesh with the gear 10a of the take-up reel stand 10, and the take-up reel stand 1
Stop the rotation of 0.

Note that as another means for forcibly stopping the take-up reel stand 10 when the eject lever 60 is operated, the methods shown in FIGS. 17 and 18 can also be considered. That is, the substantially dogleg-shaped reel stand stop plate 73 is pivotally supported at its center by the above-mentioned support pin 1d, and one end is always in contact with the pin 2g of the head stand 2, and the other end is connected to the take-up reel stand 10. It corresponds to Therefore, when the ejector lever 60 is operated and the head stand 2 is moved back, the pin 2g rotates the reel stand stop plate 73 counterclockwise, and the tip of the pin 2g rotates the reel stand stop plate 73 counterclockwise.
It is pressed against a. As a result, the take-up reel stand 10
is stopped from rotating.

As another embodiment, as shown in FIG.
is formed, and an engaging protrusion 7g is provided at the tip thereof, while a plurality of vertical holes 10a are provided in the take-up reel stand 10. As a result, when the cassette 8 is removed by operating the ejector lever 60 and the head stand lock plate 7 is returned to its original state by the spring 7a, the engaging protrusion 7g of the stop piece 7f comes into pressure contact with the back surface of the take-up reel stand 10. and finally fitted into the vertical hole 10d. Therefore, the rotation of the take-up reel stand 10 is stopped.

19 to 21, reference numerals 74, 75, and 76 denote first to third lock plates that are each pivotally supported by a shaft 77 that is pivotally connected to the chassis 1, and each is held in a horizontal state by a coil spring (not shown). are doing. The first lock plate 74 corresponds to the lock pieces 47a, 48a, and 53a formed on the fast forward lever 47, the rewind lever 48, and the recording lever 53, and the second lock plate 75 corresponds to the stop lever 4.
5 and each lock piece 4 formed on the play lever 44.
5a and 44a correspond to each other, and the third lock plate 76 corresponds to another lock piece 44a' formed on the play lever 44, respectively. Further, the first lock plate 74 has a stepped portion 75a formed at an end adjacent to the second lock plate 75, corresponding to the stepped portion 76a of the third lock plate 76.

Thus, the first lock plate 74 descends independently, but
When the second lock plate 75 is lowered, the first lock plate 75
When the lock plate 74 is lowered, the third lock plate 76 is also lowered. However, since gaps are formed between the stepped portions 75a and 76a of the second and third lock plates 75 and 76 from the beginning, the third lock plate 76 is lowered midway through the lowering of the second lock plate 75.

Next, the shapes of each lock plate and each corresponding lock piece will be explained with reference to FIGS. 21A to 21E.

The third lock plate 76 has a hook portion 7 formed by an upwardly inclined surface 76b ₁ and a vertical surface 76b ₂ connected thereto.
6b, and the locking piece 4 of the play lever 44
4a' has a hook portion 44a ₁ ' that slides on the inclined surface 76b to lower the third locking plate 76 and engages with the vertical surface 76b ₂ after passing the inclined surface 76b ₁ . The second lock plate 75 has a rising inclined surface _75b1 ,
It has a descending amount control part 75b formed by a steeply descending slope _75b2 connected to this, a gently descending slope _75b3 , and a vertical surface _75b4 connected to this, and the lock piece 44a of the play lever 44 is , a protrusion 44a ₁ that is not engaged with the lowering amount control portion 75b is formed. The third lock plate 76 is also lowered by the lowering amount of the second lock plate 75 when the protrusion _44a1 of the lock piece 44a passes the top of the lowering amount control section 75b. Further, the second lock plate 75 is formed with another lowering amount control section 75c. That is, the ascending inclined surface 75c ₁ and the descending inclined surface 75 connected thereto.
c ₂ and a vertical surface 75c ₃ , the height of the top thereof is the same as the height to the top of the other descent amount control portion 75b. And the lock release piece 4 of the stop lever 45
5a is a protrusion 4 that is not engaged with the lowering amount control portion 75c.
5a ₁ is formed. And lock release piece 45
When a passes through the top, the first lock plate 74 and the third lock plate 76 are also lowered, and if they are locked, they are released. The first lock plate 74 is the lock piece 47 of the fast forward lever 47 and the rewind lever 48.
Corresponding to a, 48a, an upwardly inclined surface 74b ₁ , a downwardly inclined surface _74b2 connected thereto, and a vertical surface 74
It has a hook portion 74b formed by b ₃ , and the lock piece 47 of the fast forward lever 47 and rewind lever 48.
a, 48a have hook portions 47a ₁ , 48a ₁ that slide on the upwardly inclined surface 74b ₁ and downwardly inclined surface 74b ₂ and are engaged with the vertical surface 74b ₃ . Also, the first lock plate 74
has a hook portion 74c formed by the inclined surface 74c ₁ and a vertical surface 74c ₂ connected thereto, and the lock piece 53a of the recording lever 53 is connected to the inclined surface 74c.
A hook portion 5 that slides into contact with 4c ₁ and engages with the vertical surface 74c ₂
Has 3a ₁ .

In FIGS. 8 and 19, 77 is a slide lever for controlling a switch, and a spring 78
It is constantly moving to the right. The slide lever 77 has a lock piece 44a of the play lever 44 and a lock piece 47 of the fast-forward lever 47.
a. A sloped portion 77a is provided at a portion corresponding to the lock piece 48a of the rewind lever 48 and the lock piece 53a of the recording lever 53, so that the slide lever 77 is moved by the spring force of the spring 78 no matter which lever is pressed. Move in the direction that resists. The slide lever 77 is provided with a known recording lever blocking plate (not shown) that prevents the recording lever 53 from being operated when other operating levers are being operated, so as to face the inclined surface 77a. .

Figure 22 shows the circuit diagram, _S1 is the power switch,
S ₂ is a timer switch that is normally closed when the timer is not operated and remains open until the set time is reached when the timer is operated, S ₃ is a switch that is closed when the switch control slide lever 77 slides, and S ₄ is a fast forward lever. 47 and rewind lever 4
S5 is a switch that is opened when the auxiliary lever 49 moves by operating 8, _S5 is a switch that is closed when the second lock plate 75 is lowered, and _S6 is a switch that is opened when the slide lever 38 is slid by rotation of the play arm 33. A switch that is opened, _S7 is a switch that is closed when the repeat slide lever 69 slides, _S8 is a switch that is closed when the stop lever 45 is operated, and _S9 is a switch that is closed when the slide lever 38 is slid. ₁₀ is a switch that is closed when the recording lever 53 is operated, S ₁₁ is a switch that is closed when the auxiliary lever 49 is moved, and S ₁₂ and S ₁₃ are remote control switches that are not shown in the mechanism diagram in the figure. _S12 is a switch that is closed when performing a play operation, _S13 is a switch that is closed when a stop operation is performed, _S14 is a memory switch not shown in the mechanism diagram, and _S15 is a counter switch that is closed when the count of the counter 11 reaches 999. . Ps is a switch that is closed when the song interval detection lever 56 is operated, MS is a circuit for detecting a song interval, and A is an amplifier. Note 18,3
1 is the motor and solenoid described above.

Next, the operation will be explained based on the above configuration.

Brake operation When the cassette 8 is first placed on the head stand 2, the protruding piece 7e of the lock plate 7 is pressed downward.
The engagement claw 7d and the lock elongated hole 2e of the head stand 2 are disengaged. Therefore, the head stand 2 moves forward until the control rod 2f provided on its lower surface abuts the play arm 33. In this state, the heads 2a and 2b of the head stand 2 are slightly inserted into the window of the cassette 8.

On the other hand, when the head stand 2 moves forward, the protruding piece 3c of the pinch roller unit 3 is disengaged, so that the unit 3 is rotated by the spring 3b and the extension piece 3d is rotated by the spring 3b.
comes into contact with the protruding piece 20a of the set plate 20, thereby stopping the unit 3. At this time, the pinch roller 3a and the capstan 4a are not in contact with each other (FIG. 23).

In this state, if you press the play lever 44,
The hook portion _44a1 ' of the lock piece 44a' is connected to the third lock plate 7.
It is engaged with the hook portion 76b of No. 6. Also, lock piece 44
Since the second lock plate 75 is pressed down, the switch _S5 located on the lower surface thereof is closed, and the slide lever 77 is moved by the lock piece 44a, and the switch _S3 is closed. Therefore the power switch
If S ₁ and timer switch S ₂ are closed, motor 18 is energized. Also with Switch S ₄
Since S ₆ is a normally closed contact, solenoid 3
1 is energized. When the solenoid 31 is energized, the lock arm 30 is attracted and disengaged from the cam teeth 29b. Then, the cam plate 29c is slightly rotated by the set plate 20, and the third gear 29
is meshed with the second gear 26. Here motor 18
Since the belt 19 is rotating, the first flywheel 4 is being rotated by the belt 19. Therefore belt 2
8, the pulley 27 is rotated, and the second gear 26
is rotated, so the third gear 29 is rotated approximately 180 degrees. The cam plate 29 is rotated by the rotation of the third gear 29.
The large diameter portion of c corresponds to the roller 33a of the play arm 33, whereby the brake arm 33 rotates and separates from the control rod 2f of the head stand 2, so that the stopper elongated hole 2d of the head stand 2 corresponds to the pin 1b. Continue moving forward until it touches the.

On the other hand, the set plate 20 has a contact front edge 20d.
corresponds to the small diameter portion of the cam plate 29c, and is pulled by the spring 21, so that the extension piece 3d of the pinch roller unit 3 separates from the protruding piece 20a.
As a result, the unit 3 is rotated and the pinch roller 3a is pressed against the capstan 4a.

Further, as the set plate 20 is pulled, the engagement protrusion 17d of the take-up unit 17, which is restricted by the abutment rear edge 20c, moves by the spring 17e following the abutment rear edge 20c. As a result, the lever 17a is rotated, and the rotating shaft 17c is rotated to rotate the rubber roller 10b of the take-up reel stand 10.
is brought into contact with. Therefore, take-up pulley 17b
is rotated by the belt 19, so the take-up reel stand 10 is rotated (FIG. 24).

As described above, the take-up reel stand 10 and the capstan 4a, which is the rotating shaft of the first flywheel 4, are rotated by the rotation of the motor 18, and the tape is played back by the operation of the amplifier A.

Stop operation rather than play operation When the stop lever 45 is pressed, the lock release piece 45
Since the second lock plate 75 is pushed down by the lever a, the second lock plate 76 is further pushed down, and the engagement between the lock piece 44a' of the play lever 44 and the third lock plate 76 is released, and the lever described later is It is returned by arm 40. Further, the lock release piece 45a of the stop lever 45 closes the switch _S8 . On the other hand, since the play arm 33 is being rotated, the slide lever 38 in contact with it is pushed, opening the switch _S6 and closing the switch _S9 . Therefore, the solenoid 31 is energized, the lock arm 30 and the cam teeth 29b are unlocked, the cam plate 29c rotates a little, and the third gear 29 and the second gear 26 are engaged. As a result, the third gear 29
rotates approximately 180 degrees, so the play arm 33 returns to its original position. Therefore, the play arm 33 comes into contact with the control rod 2f and returns the head stand 2 to the intermediate position.
On the other hand, since the set plate 20 is pulled against the spring force of the spring 21, the abutting rear edge 20c returns the take-up unit 7 to its original state against the spring force of the spring 17e. Therefore, rotation axis 1
7c separates from the rubber roller 10b of the take-up reel stand 10, so the rotation of the take-up reel stand 10 is stopped. When the set plate 20 is pulled, the protruding piece 20a pushes the extension piece 3d of the pinch roller unit 3, so that the unit 3 is rotated and the pinch roller 3a is separated from the capstan 4a.

As described above, the rotation of the take-up reel stand 10 is stopped and the pinch roller 3a is separated from the capstan 4a, so that the tape stops running. Also, since the slide lever 77 returns to its original position, the switch
_S3 is opened, and power to the motor 18 and amplifier A is also cut off.

Next, when the ejector lever 60 is pulled, the head stand 2 finishes retracting and at the same time the sub ejector lever 6
1 is rotated and the engaging rod 6 of the hook portion 61b and the lid body 64
The engagement with 4a is released. Therefore, the lid 64 is rotated, and the cassette 8 is released from the head stand 2. Also, as the head stand 2 moves, the engaging claw 7
d is pushed down by the back surface of the head stand 2,
And when the end face of the lock elongated hole 2e passes through, the elongated hole 2
When the eject lever 60 is released, the engaging claw 7d and the elongated hole 2e are engaged. This ends the eject.

Recording operation When the recording lever 53 is pressed with the cassette 8 loaded in the head stand 2, the hook 53 of the lock piece 53a
a ₁ is engaged with the hook portion 74c of the first lock plate 74. When the recording lever 53 is pressed, the switch _S10 is closed and a recording circuit (not shown) is activated. Also, since the lock piece 53a of the recording lever 53 moves the slide lever 77, the switch
_S3 is closed. Therefore, the motor 8 operates and the solenoid 31 is energized, so the head stand 2 moves further forward by the same operation as in the play state described above, and the set plate 20 moves back, so that the pinch roller 3a is moved against the capstan 4a. The rotating shaft 17c is pressed against the rubber roller 10b of the take-up reel stand 10. The tape therefore runs, and recording begins (FIG. 24). Note that the play lever 44 is pulled by the arm lever 40 and engaged with the third lock plate 76.

Fast forward operation When the fast forward lever 47 is pushed with the cassette 8 loaded in the head stand 2, the lock piece 47a is engaged with the hook portion 74b of the first lock plate 74. Further, when the fast-forward lever 47 is pushed, the fast-forward arm 35 moves and the hanging piece 35b is in contact with the bent portion 47c, so the fast-forward arm 35 pushes the protruding piece 34c of the fast-forward unit 34. As a result, the rapid feed unit 34 rotates, and its gear 34a meshes with the gear 10a of the take-up reel stand 10. Further, the rubber roller 34b is pressed against the first flywheel 4. On the other hand, when the fast forward lever 47 is pressed, the lock piece 47a moves the slide lever 77, so the switch _S3 is closed and the motor is energized.
Therefore, the take-up reel stand 10 rotates at high speed (second
Figure 5).

Further, when the stop lever 45 is pressed, the second lock plate 75 is lowered, so the first lock plate 74 is also lowered. As a result, the engagement between the fast-forward lever 47 and the first lock plate 74 is released, and the lever 47 returns to its original state. Accordingly, the fast-forward arm 35 also returns to its original state, so the fast-forward unit 34 also returns, the gears 34a and 10a are disengaged, and the rubber roller 34b also separates from the first flywheel 4. Also, slide lever 77 returns to switch _S3 .
is opened and becomes a stop state.

Rewinding Operation When the rewinding lever 48 is pushed with the cassette 8 loaded on the head stand 2, the locking piece 48a is engaged with the hook portion 74b of the first locking plate 74. Furthermore, when the rewind lever 48 is pushed, the fast forward arm 35 is rotated against the spring force of the spring 36.
The rapid feed unit 34 is rotated by being pulled by the spring force of the spring 37, and its gear 34a and the gear 9a of the supply reel stand 9 are meshed. Further, the rubber roller 34b is pressed against the second flywheel 6. On the other hand, when the rewind lever 48 is pushed, the lock piece 48a moves the slide lever 77, so that the switch _S3 is closed and the motor 18 is energized. Therefore, the supply reel stand 9 is reversely rotated at the rotational speed (FIG. 26).

Further, when the stop lever 45 is pushed, the second lock plate 75 is lowered, so the first lock plate 74 is also lowered. This releases the engagement between the rewind lever 48 and the first lock plate 74, and the lever 48 returns to its original state. Therefore, due to the spring force of the spring 36, the rapid feed arm 35 also returns to return the rapid feed unit 34 to its original state. As a result, the gear 34a
and the gear 9a are disengaged, and the rubber roller 34
b also leaves the second flywheel 6. Further, the slide lever 77 is also returned and the switch _S3 is opened to enter the stop state.

Auto-stop operation during play or recording operation As described above, during play or recording operation, the head stand 2 advances to the recording/playback position and the take-up reel stand 10 is rotating, so the first and second arms for end detection are activated. 14 and 15 are provided with rotational force in the same rotational direction as the take-up reel stand 10. Therefore, the auto-stop lever 32 engaged with the first arm 14
A rotational force is applied to the two gears in the same direction, and the engaging protrusion 32b provided at the tip thereof is pressed against the outer circumferential wall of the eccentric circular groove 25a of the first gear 25. On the other hand, the first gear 25 is meshed with a second gear 26, and the second gear 26 has a belt 28 between it and the first flywheel 4.
is wound, so the first gear 25 is rotating. Therefore, the first gear 25 is rotated with the engagement protrusion 32b in pressure contact with the outer peripheral wall, and the engagement protrusion 32b is rotated.
b and the protrusion 25c are never engaged.

When all of the tape is wound up and the take-up reel stand 10 stops rotating, the external force that was pressing the engagement protrusion 32b against the outer peripheral wall disappears, so the engagement protrusion 32b passes through the narrowest groove _25a1. After that, it is held at that trajectory position. There are protrusions 25 on this trajectory.
c is positioned, the first gear 25 is rotated to be engaged with the engagement protrusion 32b. As a result, the auto-stop lever 32 is pulled, and the stop lever 45 is pulled. Pulling the stop lever 35 is the same as pushing the stop lever 35, and therefore the play state is changed from the play state to the stop state by an action similar to the stop action. Further, after the engagement protrusion 32b and the protrusion 25c are engaged, as the first gear 25 rotates, the shoulder portion 32c of the auto-stop lever 32 comes into contact with the release protrusion 25d of the first gear 25, and the engagement occurs. Protrusion 32b
The engagement with the protrusion 25c is released, and the stop lever 45 returns to its original position.

Auto-stop operation during fast forwarding As described above, during fast forwarding, the head stand 2 is in the intermediate position, and the take-up reel stand 10 is rotating at high speed in the same direction as in the play state. Therefore, the engaging protrusion 32b is pressed against the outer circumferential wall of the eccentric circular groove 25a of the first gear 25. When the rotation of the take-up reel stand 10 is stopped, the engaging protrusion 32b and the protrusion 25c are engaged by the same operation as described above, and the following operation is the same as that during play and recording, so a description thereof will be omitted. do.

Note that even if the stop lever 45 is pulled and the switch _S8 is closed, the head stand 2 remains in the intermediate position.
Switch _S9 remains open and solenoid 31 is not energized.

Auto-stop operation during rewinding As described above, during rewinding, the head stand 2 is in the intermediate position, and the take-up reel stand 10 is rotating at high speed in the opposite direction to that in the play state. Therefore, since the auto-stop lever 45 is applied with a rotational force in the opposite direction to that in the above case, the engagement protrusion 32b is pressed against the cam base 25b in the eccentric circular groove 25a of the first gear 25. As a result, while the take-up reel stand 10 is rotating, the first gear 25 is rotated with the engagement protrusion 32b in pressure contact with the cam stand 25b. When the rotation of the take-up reel stand 10 is stopped, the engagement protrusion 32b passes through the narrowest groove portion _25a1 and is then held at its trajectory position. There are protrusions 25 on this trajectory.
c is positioned, the first gear 25 is rotated to be engaged with the engagement protrusion 32b. Since the following operation is exactly the same as the auto-stop operation during fast forwarding, the explanation will be omitted.

Pause Operation During Play and Recording As described above, during play and recording, the head stand 2 is in the recording/reproducing position and the take-up reel stand 10 is rotating. When the pause lever 42 is pressed here, it is locked by the lock plate 43 and the set plate 20 is pushed, causing the take-up unit 17 to be locked.
Rotate. As a result, the rotating shaft 17c separates from the rubber roller 10b of the take-up reel stand 10, and the rotation of the take-up reel stand 10 is stopped. That is, the state is the same as when the tape has stopped running in the play and record states described above, but here the biasing arm 22 is rotated by the spring force of the spring 23, causing the control lever 24 to rotate. Therefore, the auto-stop lever 32 in contact with the control lever 24 is rotated in the same direction as in the play or fast-forward state, and the engaging protrusion 32b is brought into contact with the outer peripheral wall of the eccentric circular groove 25a. As a result, while the first gear 25 is rotating, the engagement protrusion 35b and the protrusion 25c are not engaged, that is, the playing or recording state is not stopped (FIG. 27).

Auto-stop operation during fast forwarding or rewinding During fast forwarding or rewinding, the head stand 2 is in the intermediate position and the take-up reel stand 10 is rotating at high speed. Even if the pause lever 42 is pressed here, the large diameter part of the cam plate 29 is in contact with the set plate 20 and the biasing lever 22, so both levers 20, 22 are pressed.
2 is not affected in any way, so the biasing lever 22 does not apply any external force to the auto-stop lever 32. That is, the auto-stop operation is performed by an operation similar to the above-described auto-stop operation after the tape is wound or rewound.

Queue operation When the fast-forward lever 47 is pressed in the playing state, the fast-forward unit 3 is activated via the fast-forward arm 35.
4, the gear 34a is brought into mesh with the take-up reel stand 10 and the gear 10a, and the rubber roller 34b is brought into pressure contact with the first flywheel 4. When the fast forward lever 47 is pressed, the switch _S9 is closed via the slide lever 38, and the switch S11 is closed via the auxiliary lever ₄₉ , so that the solenoid 31 is energized. As a result, the cam plate 29c rotates, the arm lever 33 is rotated, the head stand 2 is returned to the intermediate position, the pinch roller 3a is separated from the capstan 4a, and the rotating shaft 17c is rotated, and the rubber roller 10a of the take-up reel stand 10 is moved away from the pinch roller 3a. move away from Therefore, the take-up reel stand 10 is rotated at high speed and enters a fast-forwarding state. Further, even if the first lock plate 74 is lowered, the third lock plate 76 is not lowered, so that the play lever 44 remains locked to the third lock plate 76. Note that since the lever arm 40 is not rotated by the set plate 20, it is not returned to the play lever 44.

When the fast-forwarding lever 47 is released, the fast-forwarding arm 35 returns, the fast-forwarding unit 34 also returns, the gear 34a and the gear 10a of the take-up reel stand 10 are disengaged, and the rubber roller 34b is separated from the first flywheel 4 for fast-forwarding. The condition is canceled. Furthermore, as the fast-forward lever 47 returns, the slide lever 38 and the auxiliary lever 49 return, so switches _S6 and _S4 are closed (switch _S5 is closed because the second lock plate 75 is lowered, and switch S is closed because the second lock plate 75 is lowered). ₃ is closed because the slide lever 77 is moving), so the solenoid 31 is energized. As a result, the cam plate 29c rotates, the arm lever 33 is rotated, the head stand 2 is placed in the recording/playback position, and the set plate 2 is
0 moves and the pinch roller 3a moves to the capstan 4.
a, and the rotating shaft 17c is attached to the take-up reel stand 10.
The rubber roller 10a contacts the rubber roller 10a. Therefore, it returns to the playing state again.

Review operation When the rewind lever 48 is pressed in the play state, the fast forward arm 35 is rotated and the spring 3
At this time, the protrusion 34d of the fast-forwarding unit 34 comes into contact with the step 38c of the slide lever 38, so the gear 34a is pulled.
and the gear 9a of the supply reel stand 9 are not meshed with each other.
That is, the tape is prevented from being pulled in the opposite direction before the playing state is released. Since the rewind lever 48 is pressed, the auxiliary lever 49
Since the switch _S11 is closed by the switch S11 (the switch _S9 is closed by the slide lever 38), the solenoid 31 is energized. As a result, the head stand 2 returns to the intermediate position in the same way as in the queue operation described above, and the pinch roller 3a moves to the capstan 4a.
The rotating shaft 17c is further separated from the rubber roller 10a of the take-up reel stand 10. Also play arm 3
3 is rotated, the rapid feed unit 3
4 protrusion 34d and step portion 38 of slide lever 38
c is disengaged. The rapid feed unit 34 rotates further, and the gear 34a and the gear 9 of the supply reel stand 9
a are meshed with each other, and the rubber roller 34b is pressed against the second flywheel 6, resulting in a rewinding state.

When the rewind lever 48 is released, the fast-forward arm 35 and the fast-forward unit 34 return to their original states, and the gear 34a and the gear 9a of the supply reel stand 9
The rubber roller 34b is disengaged from the second flywheel 6, and the rubber roller 34b is separated from the second flywheel 6, and the unwinding state is released. Thereafter, the player returns to the play state by performing the same operation as the cue operation.

Quick Review When you press the rewind lever 48 in the recording state,
Since the first lock plate 74 is lowered by the lock piece 48a, the recording lever 53 and the first lock plate 74 are lowered.
The recording circuit stops when it is disengaged from the recording circuit. However, the play lever 44 is held locked in the same manner as in the queue and review operations described above. Note that the rewind lever 48 is operated by the second lock plate 75 being lowered by the play lever 44.
The lock piece 48a and the first lock plate 74 are never engaged. Further, in the queue and review operations described above, the fast forward lever 47 and the rewind lever 48 are not engaged with the first lock plate 74, respectively, for the same reason as above.

When the rewind lever 48 is pressed, the rewind state is entered by an operation similar to the review operation described above, and when the rewind lever 48 is released, the play state is entered. Therefore, the recorded portion can be played back simply by operating the rewind lever 48.

Auto-repeat operation When the auto-repeat lever 66 is locked when neither recording/playback nor fast-forwarding nor rewinding is being performed, the switch _S7 is closed and the motor 18 is operated. Further, the auto repeat lever 66 moves the repeat slide lever 69 forward, and the engagement piece 69d provided on the lever 69 moves the fast forward lever 3
5, the fast forward lever 3 is pressed.
5 is rotated to rotate the rapid feed unit 34 via the spring 37. Therefore, the gear 34a is meshed with the gear 9a of the supply reel stand 9, and the rubber roller 34b is pressed against the second flywheel 6, resulting in a rewinding state.

Then, all of the tape is rewound and the take-up reel stand 1
When the rotation of 0 stops, the stop lever 45 is pulled by the auto-stop operation described above. Since the switch S ₇ is closed and the head stand 2 is in the intermediate position, the switches S ₄ and S ₆
is closed, and the switch _S5 is closed by pulling the stop lever 45 and lowering the second lock plate 75, so that the solenoid 31 is energized. Therefore, the play arm 33 is rotated, the head stand 2 is advanced to the recording/reproducing position, and the set plate 20 is moved forward, so that the pinch roller 3a and the capstan 4a are pressed against each other, and the rotating shaft 17c and the take-up reel stand are pressed against each other. 10 rubber rollers 10a are brought into contact with each other. Furthermore, as the slide lever 38 is moved forward by the rotation of the play arm 33, the stepped portion 38c pushes the protrusion 34d of the fast-forwarding unit 34, causing the fast-forwarding unit 34 to rotate a little, thereby shifting the gear 34a and the gear of the supply reel stand 9. At the same time, the rubber roller 34b and the second flywheel 6 are separated from each other. Therefore, it becomes a play state. Furthermore, the set plate 20
When the lever arm 40 is moved toward this side, the lever arm 40 is rotated, and the play lever 44 is accordingly pulled and locked by the third locking plate 76, so that it can be seen from the outside that the play operation is in progress.

When the play operation is completed and the rotation of the take-up reel stand 10 is stopped, the auto-stop operation described above is activated and the play arm 33 is rotated. As a result, the slide lever 38 moves forward, and the engagement between the step portion 38c and the protrusion 34d of the fast-forwarding unit 34 is disengaged, and the fast-forwarding unit 34 is therefore rotated and the gear 34a and the gear 9a of the supply reel stand 9 are disengaged. The rubber roller 34b and the second flywheel 6 are engaged with each other, and the second flywheel 6 is brought into pressure contact with the rubber roller 34b to be in a rewinding state. Thereafter, in the same way as the above-mentioned operation, when the rewinding is completed, the play operation is started and becomes an auto-repeat operation.

Auto repeat operation during recording operation Auto repeat lever 66 during recording operation
When the disc is locked, the recording operation is performed without being rewound by an operation similar to that during the play operation described above. When the recording is completed and the rotation of the take-up reel stand 10 is stopped, an auto-stop operation is performed, the recording lever 53 is released, and a rewinding operation is started. Thereafter, the play state is entered after rewinding is performed by an operation similar to the auto-repeat operation in the play operation described above.

Manual auto-repeat operation If a play operation is performed with the auto-repeat lever 66 locked, the auto-stop operation will operate at the end of the play operation and rewind. If you wish to do so, press the stop lever 45. When the lever 45 is pressed, switch _S8 is closed (switch _S7 is closed because the auto repeat lever 66 is locked, and switch S9 is closed because the auto repeat lever 66 is locked), and switch _S9 is closed because the auto repeat lever 66 is locked.
is rotated clockwise and the slide lever 38 is moving forward (closed), so the solenoid 31 is energized. Therefore, the play arm 33 is rotated, the head stand 2 is moved back to the intermediate position, and the set plate 20 is moved forward, so that the pinch roller 3a and the rotating shaft 17c are separated from the capstan 4a and the take-up reel stand 10, respectively. Further, as the play arm 33 rotates, the slide lever 38 retreats and releases the restriction on the fast-forward unit 34, so the fast-forward unit 34 rotates, the gear 34a meshes with the gear on the supply reel stand 9, and the rubber roller 34b It is pressed against the second flywheel 6. Therefore, it becomes a rewinding state.

And to go from rewind to play mode,
When the stop lever 45 is pressed again, the switch _S5 is closed, and since the head stand 2 is in the intermediate position, the switches _S4 and _S6 are closed, and the auto repeat lever 66 is locked, so the switch _S7 is closed. Therefore, the solenoid 31 is energized. Since the following operation is the same as the operation from the rewinding state of the auto-repeat operation to the play state when the auto-stop is activated, the explanation thereof will be omitted.

Fast-forward operation during auto-repeat operation When the fast-forward lever 47 is pressed to perform a fast-forward operation while the auto-repeat lever 66 is locked and a play operation is being performed, the lock piece 47
a is engaged with the hook portion 74b of the first lock plate 74. Further, as the fast forwarding lever 47 moves forward, the slide lever 38 moves forward and the switch _S9 is closed, and the auxiliary lever 49 also moves forward and the switch _S11 is closed, so that the solenoid 31 is energized. Therefore, the head stand 2 is moved back to the intermediate position by the same operation as when the stop lever 45 is pressed during the play operation in the auto-repeat operation described above, and the pinch roller 3a is moved from the capstan 4a to the rotating shaft 17c.
are separated from the take-up reel stand 10, respectively. Since the fast-forward lever 47 is pressed, the fast-forward arm 35 moves and the protrusion 34c of the fast-forward unit 34 moves.
Press to rotate the rapid forwarding unit 34. Therefore, the gear 34a is the gear 10a of the take-up reel stand 10.
At the same time, the rubber roller 34b is brought into pressure contact with the first flywheel 4, resulting in a rapid feed state.

If the stop lever 45 is pressed in this fast-forward state, the play operation is shifted to by an operation similar to the operation from rewind to play in the manual repeat operation described above.

Song interval detection operation When the song interval detection lever 56 is rotated, the lower tip 5
6b rotates the control plate 59 counterclockwise against the spring force of the coiled spring 60. At the same time, since the protrusion 56a of the lock plate 57 moves, a clockwise rotational force is applied by the spring force of the coiled spring 58.
Therefore, the pawl 57a of the lock plate 57 is initially connected to the control plate 59.
However, as the control plate 59 rotates, one end of the control plate 59 is positioned above the pawl 57a, so that the spring force of the coil spring 58 causes the pawl 57a of the lock plate 57 and the control plate 59 to be in contact with each other. is engaged and locked. Further, the switch Ps is turned on by rotating the song interval detection lever 56. Next, when the play lever 44 is operated, the tape enters a playback state and starts running. At this time, since the third lock plate is pushed down by the control plate 59, the play lever 44 is not locked and is held in the operating state only by the lever arm 40. For example, when the rewind lever 48 is operated in this playback state, the lever 48 moves to the first position.
It is locked by the lock plate 74 and shifts from the playback state to the rewind state. Since the song interval detection lever 56 and the rewind lever 48 are operating, the song interval detection circuit is activated.
When the MS works and detects a song interval (no signal period) on the tape, the play lever 44 is pulled in by the lever arm 40 and lifts the second lock plate 75.
The rewinding lever 48, which was locked to the first locking plate 74, is released, and the recording state is shifted to the playback state to play back the desired recorded portion. Rapid forwarding can also be performed in the same manner.

Recording timer operation Close the power switch _S1 and lock the recording lever 53. In this state, the timer switch
When S ₂ is closed, the slide lever 77 has moved, so the switch S ₃ is closed, and the recording lever 53 is closed.
is moving, so switch S ₁₀ is closed, and since head stand 2 is in the intermediate position, switches S ₄ ,
S ₆ is closed. Therefore, recording is started by an operation similar to the above-described recording operation, the tape reaches the end, and the tape is stopped by the auto-stop operation.

Play timer operation Close the power switch _S1 and lock the play lever 44. When timer switch _S2 is closed in this state, switch _S3 is closed because slide lever 77 is moving, and switch _S5 is closed because play lever 44 is pushed and second lock plate 75 is lowered. Furthermore, since the head stand 2 is in the intermediate position, switches S ₄ and S ₆ are closed. Therefore, play is started by an operation similar to the play operation described above, and when the end of the tape is reached, the tape is brought to a stop state by an auto-stop operation.

Remote control operation When the remote control switch _S12 installed at a location not shown in the mechanical drawing is pressed, the motor 18 is energized, the second gear 27 is rotated, and the first gear 2
5 is rotated. However, since it is not in the recording/reproducing state or in the fast forwarding or rewinding state, the supply reel stand 9 and the take-up reel stand 10 do not rotate either, and the auto-stop operation is activated. Before operating the remote control, the song interval detection lever 56 is locked and the third lock plate 76 is lowered. Then, when the stop lever 45 is pulled by the auto-stop operation and the switch _S5 is closed (at this time, since the head stand 2 is in the intermediate position, the switches _S4 and _S6 are also closed), the solenoid 31 is energized. Therefore, the play arm 33 rotates, the head stand 2 moves forward to the recording/reproducing position, the set plate 20 is pulled forward, the pinch roller 3a is pressed against the capstan 4a, and the rotating shaft 17c is brought into contact with the rubber roller 10b of the take-up reel stand 10. is brought into contact with. Therefore, the play state is entered, and the play lever 44 is pulled by the lever arm 40. However, at this time, the song interval detection lever 5
6, the third lock plate 76 is lowered, so the lock piece 44a' and the third lock plate 76 are not engaged with each other. Therefore, the play lever 44 remains pulled only by the arm lever 40.

Then, when the remote control switch _S13 is closed, even if the remote control switch _S12 is opened, it is still in the play state, so _S3 is closed. Therefore, the solenoid 31 is energized, so the head stand 2 returns to the intermediate position, the pinch roller 3a separates from the capstan 4a, and the rotating shaft 17c separates from the rubber roller 10b. Furthermore, the play lever 44 is returned to its original state by the arm lever 40. Then, when the remote control switch _S12 is closed again, the play state is resumed by the above-described operation.

Memory operation Memory switch not shown in the mechanical drawing
Press S ₁₄ . Then, when the counter 11 is set to zero and the play lever 44 is locked, the play operation is performed by the above-described operation. If it is desired to open the playback section again, the stop lever 45 is operated to perform the above-described stop operation to bring the playback to a stop state. Then, the rewind lever 48 is locked and the tape is rewound by the rewind operation described above. Then, when the counter 11 is reversed and reaches 999, the counter switch _S15 is closed, the slide lever 77 is moved and the switch _S3 is closed, and the head stand 2 is in the intermediate position and the switch _S6 is closed. Therefore, the solenoid 31 is energized. As a result, the play arm 33 is rotated, the head stand 2 is advanced to the recording/reproducing position, and the set plate 20 is moved forward, so that the pinch roller 3a is pressed against the capstan 4a, and the rotating shaft 17c is rotated. It comes into contact with the rubber roller 10b of the take-up reel stand 10. Therefore, the play state is entered, and the play lever 44 is also advanced and locked by the lever arm 40. In addition, rewind lever 4
8, the lock is released.

Eject operation while the take-up reel stand is rotating When the take-up reel stand 10 is rotating by the driving force of the motor, that is, during recording, playback, or fast-forwarding operations, operating the eject lever 60 moves the head stand 2 to the final position. As it moves backward, the cassette 8 is ejected from the reel stands 9 and 10. However, in this state, the take-up reel stand 10 continues to rotate by the driving force of the motor, so the device continues to operate. Therefore, when the ejector lever 60 is operated as shown in FIGS. 16 to 18, the take-up reel stand 10 is forcibly stopped, and the apparatus is stopped by the auto-stop operation described above. That is, in the embodiment shown in FIG. 16, the pinch roller unit 3 is restored, and in FIG. 17, the head stand 2 is retreated, and the
In the figure, the take-up reel stand 10 is stopped when the cassette 8 is ejected.

Remote control operation in auto repeat operation The remote control operation does not work unless the song interval detection lever 56 is locked as described above, but the case where the auto repeat lever 66 is also locked will be explained here.

In this case, as can be seen from the circuit diagram in Figure 22,
Since the remote control switch S ₁₃ is connected in parallel with the circuits of the switches S ₄ , S ₅ , S ₆ and the circuits of the switches S ₈ and S ₉ , the solenoid 31 is energized every time the remote control switch S ₁₃ is operated. I can do it. Therefore, the above manual repeat operation can be performed remotely.

As described above, the present invention forms an eccentric circular groove having a narrow groove on a rotary plate that rotates irrespective of the rotation of the reel stand, and also provides a protrusion on a concentric circle of the narrow groove. A crescent-shaped engagement protrusion is provided on the auto-stop lever to which rotational force is applied, and this engagement protrusion is engaged with the above-mentioned protrusion when the take-up reel stand is stopped, and when the pause lever is operated. When the rewind lever is operated, the take-up reel base applies rotational force to the auto-stop lever, so even if the mechanical auto-stop mechanism is equipped with a pause lever, fast forwarding and rewinding is possible. Sometimes the auto-stop function operates, and the pause state is maintained even during fast-forwarding, rewinding, and after the auto-stop mechanism operates, so when starting recording or playback again after the end of the tape, you can operate the pause lever as before. There is no need to perform recording and playback operations afterwards, and therefore, the number of operation modes can be reduced by one compared to the conventional operation mode, which has the effect of simplifying the operation.

[Brief explanation of the drawing]

The figures show an embodiment of the drive mechanism of a tape recorder according to the present invention; FIG. 1 is a top view, FIG. 2 is a bottom view, FIG. 3 is a top view showing the lock mechanism of the magnetic head stand, and FIG. 4 is a top view. FIG. 5 is a side view showing the locking mechanism of the magnetic head stand; FIG. 5 is a sectional view showing the take-up reel stand and part of the auto-stop mechanism; FIG. 7
The figure is a top view showing the operating lever and the drive mechanism, Fig. 8 is a perspective view showing the operating lever and the drive mechanism, Fig. 9 is a perspective view of the auto-stop mechanism, Fig. 10 is a perspective view of the driving force transmission part, and Fig. The figure is a top view of the music select operating lever, Figure 12 is an operation diagram showing the music select operating lever, Figure 13 is a top view of the eject operating lever and auto repeat operating lever, and Figure 14 is a top view of the eject operating lever and auto repeat operating lever. A side view of the repeat operation lever, Fig. 15 shows an operation diagram of the eject operation lever and auto-repeat operation lever, Fig. 16 shows an operation diagram of the reel stand stop mechanism, and Fig. 17 shows another embodiment of the reel stand stop mechanism. 18 is an operation diagram showing another embodiment of the reel stand stop mechanism, FIG. 19 is a perspective view of the operating lever, and FIGS. 20A to 20C are operation diagrams showing the relationship between the operating lever and the lock plate. Figures, Figures 21A to 2
Figure 1E is an operation diagram showing the relationship between each operating lever and the lock plate, Figure 22 is a circuit diagram, Figure 23 is an operation diagram at the intermediate position of the headstand, Figure 24 is a play operation diagram, and Figure 25 is a play pose. 26 is a rewind operation diagram, FIG. 27 is a fast forward operation diagram, and FIG. 28 is an auto repeat operation diagram. 1... Chassis, 2... Head stand, 3... Pinch roller, 4... First flywheel, 6... Second flywheel, 7... Lock plate, 8... Cassette, 9... Supply reel stand , 10... Take-up reel stand, 11... Counter, 14... First terminal for end detection
Arm, 15... Second arm for end detection, 17...
...Take-up unit, 18...Motor, 20
... Set plate, 22 ... Biasing arm, 24
...Control lever, 25...First gear, 25a...
Eccentric circular groove, 25c... protrusion, 26... second gear,
29...Third gear, 29b...Cam tooth, 29c...
...Cam plate, 30...Lock arm, 31...Solenoid, 32...Auto stop lever, 33...
...Play arm, 34...Fast forward unit, 35
...Fast forward arm, 38...Slide lever, 4
0... Lever arm, 42... Pause lever, 4
3...Pause lever lock plate, 44...Play lever, 45...Stop lever, 47...Fast forward lever, 48...Rewind lever, 53...Record lever, 56...Song interval detection lever, 57...Lock Plate, 59...Control board, 60...Eject lever, 61...Sub-engine lever, 64...Lid body, 66...Auto repeat lever, 67...Repeat lock plate, 69...Repeat slide lever, 71...Reel stop plate.

Claims (1)

[Claims] 1. An auto-stop lever, which is constantly rotated by a motor, is provided with a rotational force in the direction of rotation as the take-up reel table rotates, and has an engagement protrusion at its tip that engages with a protrusion described later. An eccentric circular groove is formed on one side of which the engaging protrusion faces, and a cam base is formed within the eccentric circular groove, and the narrowest groove portion formed by the outer peripheral wall of the eccentric circular groove and the cam base is formed. When operating the rotary plate having a protrusion located concentrically with the middle, the fast-forward lever, and the rewind lever, the pause lever applies rotational force to the auto-stop lever regardless of the take-up reel stand, as will be described later. The control lever comprises means for preventing the control lever from coming into contact with the auto-stop lever, and a control lever for applying rotational force to the auto-stop lever when the pause lever is operated. Even if the take-up reel stand stops rotating, the engagement protrusion and the protrusion are engaged to pull the auto-stop lever to the stop state, and the pause lever is maintained in the operated state. Features of the tape recorder drive mechanism.