JPH0442739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to reverse type cassette tape recorders such as car stereos and other audio tape recorders or video tape recorders that use tape cassettes such as compact cassettes, micro cassettes, and video cassettes. It is related to.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, in this type of cassette tape recorder, (a) a tape cassette in an ejected state is removed from a cassette holder, which is an example of a cassette holding member for tape cassette loading; When a tape cassette is inserted into a cassette holder, the inserted tape cassette will run in the tape running direction when the removed tape cassette is ejected, which is stored in a memory circuit such as a flip-flop circuit or a slide switch. is started, or
(b) Once the tape cassette is in the ejected state, it always starts with tape rewinding in the normal running state, and then normal reproduction is performed from the top of the tape.

However, according to the former (a), when a tape cassette is removed from the cassette holder, it is almost always the case that the tape cassette is replaced; However, if, for example, the removed tape cassette is ejected during tape running for reverse playback, the playback will start in reverse, and there is a possibility that reverse playback will probably start from the middle of the tape. Also, according to the latter (b), if the ejected tape cassette is not ejected, which is the case in most cases, even if you want to continue playing the tape, normal playback will start again from the tape top. . In any case, it has the disadvantage of being inconvenient for the user.

Purpose of the Invention The present invention was invented in view of the above points, and provides a reverse type cassette tape recorder that is convenient for the user when the tape cassette is ejected. It is something.

Summary of the Invention The reverse type cassette tape recorder of the present invention includes (a) a cassette holding member for tape cassette loading that is reciprocally movable between the cassette insertion position and the cassette attachment position of the tape cassette; (b) (c) cassette holding detection means for detecting removal of the tape cassette which has been completely ejected from the cassette holding member at the cassette insertion position; (d) bistable means configured to reverse the tape cassette to the other state by moving at least the cassette holding member back from the cassette mounting position to the cassette insertion position; When a new tape cassette is inserted and loaded with the bistable means set to the one state, the tape is rewound to the tape top and then the tape starts running in a predetermined direction; When the tape cassette in the ejected state is loaded again and the bistable means remains set to the other state, the tape cassette is controlled to control the tape running so as to start tape running at the time of ejection. It is characterized by the fact that it is equipped with

As a result, when the bistable means is in one state, for example, if the tape is set to start from rewinding in the normal running state, the tape cassette in the ejected state is removed and the tape cassette is replaced. If you want to get normal playback from the tape top, it will start from normal playback from the tape top, and if you want to get the continuation of the previous playback even if the tape cassette is not removed. In this case, the tape runs in the same direction as when the tape cassette is ejected, and the continuation of the previous step is obtained, which is convenient for the user.

Embodiment Hereinafter, an embodiment in which the present invention is applied to a car stereo (auto reverse device) will be described based on the drawings.

[Structural explanation of the cassette retracting and mounting mechanism consisting of a cassette lifting mechanism and an automatic retracting mechanism]

First, in FIGS. 1A to 2C, 1 is a tape cassette which is a compact cassette, 2 is a cassette holder for loading the tape cassette,
3 is a mechanical board. This car stereo is configured as an auto-reverse device, and on the mechanical board 3 are a pair of capstans 4 and 5, a pair of pinch rollers 6 and 7 with an automatic crimping mechanism facing each other, and an automatic azimuth adjustment mechanism. A magnetic head 8, a pair of reel shafts 9 and 10, a capstan driving motor 11, and the like are installed in appropriate positions. This car stereo is configured as a one-motor system, and the motor 11 drives all of the operation switching mechanisms described later, including the capstan drive, reel stand drive, pinch roller crimping mechanism drive, and azimuth automatic adjustment mechanism drive. It is configured so that it can also be used for driving.

Next, the cassette holder 2 is raised and lowered between the cassette insertion position (raised position) of the tape cassette 1 shown in FIG. 2A and the cassette mounting position (lowered position) of the tape cassette 1 shown in FIG. 2C. The cassette raising/lowering mechanism 14 is shown in FIGS. 1A to 2C. The cassette elevating mechanism 14 has an elevating drive frame 15, and the elevating drive frame 15 is horizontal to a sub-board 16 fixed at a predetermined height position above one end of the mechanical board 3, and is aligned with the same axis. It is mounted so as to be able to swing up and down via a pair of fulcrum shafts 17 arranged. And the lifting drive frame 1
The cassette holder 2 is rotatably supported at the lower part of the distal end portion 15a of the cassette holder 2 via a hinge structure 23. Note that the guided pin 18 horizontally fixed to one side of the cassette holder 2 is inserted into a vertical guide groove 20 provided in a guide plate 19 vertically erected on one side of the mechanical board 3. It is configured to be inserted and guided. And the lifting drive frame 15
is oscillated in the direction of arrow a in FIG. 2A by a spring, which will be described later, so that the cassette holder 2 is brought to the cassette insertion position (raised position) of the tape cassette 1 shown in FIG. 2A. It is being encouraged to rise. As shown in FIGS. 1A and 2A, the cassette holder 2 comes into contact with the upper end 21a of the almost L-shaped height regulating plate section 21 that stands vertically on one side of the mechanical board 3, and rises. Regulated by location.

On the other hand, the tape cassette 1 is inserted from its longitudinal direction into a cassette holder 2 in the direction of arrow b in FIGS. 1A and 2A, and is held within the cassette holder 2. At this time, a leaf spring 22 is fixed to one side of the cassette holder 2 to elastically press one side of the tape cassette 1 inserted into the cassette holder 2 and apply an appropriate frictional locking force to the tape cassette 1. ing.

Next, as shown in FIGS. 1A to 2C, a cassette retracting member 25 is attached to the center of the upper horizontal plate portion 16a of the sub-board 16. This cassette retracting member 25 is connected to the horizontal plate portion 16a.
It is configured to be able to freely slide horizontally along a guide groove 26 provided along a direction parallel to the direction of the arrow a, which is the cassette insertion direction. The cassette retracting member 25 is made of, for example, a synthetic resin molded product, and an engaging portion 28 that is engaged with one of the pair of reel shaft insertion holes 27 of the tape cassette 1 is integrally formed at the tip end thereof. The tape cassette 1 is provided with an abutting portion 29 integrally provided on the lower surface of the rear end side, with which the tape cassette 1 is abutted. Further, a leaf spring 30 is fixed to the tip of the upper horizontal plate portion 16a for elastically pressing the tip of the cassette retracting member 25 downward.

Next, drive the cassette retracting member 25,
An automatic retracting mechanism 33 for automatically retracting the tape cassette 1 into the cassette holder 2 is provided with a third automatic retracting mechanism 33.
This is shown in Figures A to 5. This automatic retraction mechanism 33 has a retraction operation lever 34, a retraction drive lever 35, and a switch operation lever 36. The retraction operation lever 34 and the retraction drive lever 35 are rotatably supported on a vertical fulcrum shaft 37 fixed on the upper horizontal plate portion 16a of the sub-board 16, and are arranged one above the other. The switch operation lever 36 is also rotatably mounted on the upper horizontal plate portion 16a of the sub-board 16 via a fulcrum shaft 38. At this time, both fulcrum shafts 3
7 and 38 are arranged on both sides of the guide groove 26, and the tips of the retracting operation lever 34 and the switch operation lever 36 intersect in a substantially V-shape at the upper position of the guide groove 26, and are stacked vertically. There is. A pair of elongated holes 39 and 40 formed at the distal ends of both levers 34 and 36 intersect with each other at a portion thereof, and the upper surface of the rear end of the cassette retracting member 25 is inserted into the intersection. A pin 41, which is integrally provided in both, is inserted in common. A switch operation cam 42 is integrally provided around the fulcrum shaft 38 of the switch operation lever 36, and a cassette detection switch is mounted on the upper horizontal plate portion 16a of the sub board 16 in the vicinity of the switch operation cam 42. 43 is installed. The switch operation cam 42 is configured to rotate the operated element 44 of the switch 43. The operated element 44 is moved to the third position by a built-in return spring (not shown).
In figure A, it is rotated in the direction of arrow c.

Next, as shown in FIGS. 4 and 5, a cam grooved gear 47 in the operation switching mechanism, which will be described later, is mounted on the mechanical board 3 at the bottom of the retraction drive lever 35.
is rotatably arranged at a position eccentric to the fulcrum shaft 37, and its cam grooved gear 47 is configured to be driven in forward and reverse rotation by the motor 11 as described later. . A substantially spiral first cam groove 48 is provided on the upper surface of the cam grooved gear 47. Then, an engager 49, which is a roller rotatably supported by a lower portion of a part of the retraction drive lever 35, is inserted into the cam groove 48 through an arcuate hole 50 provided in the lower horizontal plate portion 16b of the sub-board 16. When the cam grooved gear 47 is rotated in the forward or reverse direction, the retraction drive lever 35 is rotated in the direction of the arrow d or d' in FIG. It is configured to be dynamically driven. Further, a return spring 52 is interposed between the retraction operation lever 34 and the retraction drive lever 35. This return spring 52 is constituted by a torsion spring, and its coil portion 52a is fitted around the outer periphery of the fulcrum shaft 37.
b, 52c, projections 5 integrally provided on the retraction operation lever 34 and the retraction drive lever 35, respectively.
3 and 54, respectively. Then, due to the rotational force of the return spring 52, the retraction operation lever 3
4 is rotationally biased in the direction of arrow d' in FIG. 3A with respect to the retraction drive lever 35, and as shown in FIG. Rotation in the direction of the arrow d' is restricted by contacting an integrally provided protrusion 56. Note that the retraction drive lever 35 has an engager 49 that is connected to the first cam groove 4 of the cam grooved gear 47.
8, the cam grooved gear 47
It is configured to be regulated at a position corresponding to the rotation of.

Next, a locking mechanism 59 for locking the cassette retracting member 25 during forward movement is shown in FIGS. 6-8. This lock mechanism 59 is connected to the lock plate 6.
0, and this lock plate 60 is configured to lock the switch operating lever 36, which is an interlocking member that is interlocked with the cassette retracting member 25. At this time, first, the engaged element 61 consisting of a pin fixed to the lower part of the switch operation cam 42 of the switch operation lever 36 is inserted through the arcuate hole 62 provided in the upper horizontal plate part 16a of the sub-board 16 and downwards. is prominent.

On the other hand, the locking plate 60 is a member for locking the engaged element 61, and is disposed at the lower part of the upper horizontal plate portion 16a. This lock plate 60 is inserted into a fulcrum shaft 64 vertically fixed to the lower part of the upper horizontal plate portion 16a through a through hole 63 provided at one end thereof. Also, this lock plate 60
A protrusion 65 integrally provided on one end side is loosely fitted into a wide elongated hole 66 provided in a vertical plate portion 16c connecting the upper and lower horizontal plate portions 16a and 16b of the sub-board 16. Further, a return spring 67 constituted by a torsion spring is fitted on the outer periphery of the fulcrum shaft 64 at the bottom of the lock plate 60 with its coil portion 67a and fixed with a washer 68. Both ends 67b and 67c of 67 are lock plates 6
A protrusion 69 and a wide elongated hole 66 are integrally provided at 0.
It is in contact with one side edge 66a of. By the way, the lock plate 60 is rotatable in a horizontal plane around the axis of the fulcrum shaft 64, and is also freely rotatable up and down on the fulcrum shaft 64 side in a vertical plane parallel to the axis of the fulcrum shaft 64. It is configured. Then, the lock plate 60 is rotated about the fulcrum shaft 64 by the torsional force exerted by both ends 67b and 67c of the return spring 67.
In the figure, it is rotated horizontally in the direction of arrow e, and
Due to the compressive repulsive force of the coil portion 67a of the return spring 67, it is urged to rotate vertically in the direction of the arrow f in FIG. 8A with the fulcrum shaft 64 as the rotation center. At this time, as shown in FIG. 7A, the protrusion 65 comes into contact with the other end edge 66b of the wide elongated hole 66, and the arrow e of the locking plate 60
Further, as shown in FIG. 8A, the lock plate 60 is brought into contact with the lower surface of the downward convex portion 70 that is integrally provided on the lower surface of the upper horizontal plate portion 16a. Rotation in the direction of arrow f is restricted.

As described above, the lock plate 60 attached to the sub-board 16 and the engaged element 61 fixed to the lower part of the switch operation lever 36 have the positional relationship shown in FIGS. 7A and 8A. There is. The engaged element 61 is connected to the fulcrum shaft 6 with respect to the lock plate 60.
It is configured to be relatively moved along an arcuate trajectory g with rotation center at 4. On the other hand, an inclined surface 71, an engaging portion 72, and an inclined piece 73 are sequentially integrally provided on one edge side of the locking plate 60 (upper side in FIG. 7A) from the tip of the locking plate 60 to the fulcrum shaft 64 side. There is.

[Operation explanation of the cassette retracting device mechanism (cassette lifting and lowering mechanism and automatic retracting mechanism)]

Next, the cassette lifting mechanism 1 configured as above
The operation of the cassette retracting and mounting mechanism comprising the automatic retracting mechanism 33 and the automatic retracting mechanism 33 will be explained with reference to FIGS. 1A to 8C.

[Automatic tape cassette retraction operation]

First, when the ejection of the tape cassette 1 is completed, the cassette holder 2 has been raised and returned to the cassette insertion position of the tape cassette 1 shown in FIG. 2A. Further, the cassette retracting member 25 is connected to the first A
2A and 3A, respectively, at the backward movement positions shown by solid lines. In this ejected state, the engaged element 61 of the switch operation lever 36 is in the state shown in FIGS. 7A and 8A relative to the lock plate 60, and the cassette detection switch 43 is in the OFF state.

Next, the tape cassette holder 2 is inserted from the direction of arrow b in FIGS. 1A and 2A. When the tape cassette 1 is inserted to a certain extent, the second
As shown by the solid line in the figure, one end of the tape cassette 1 is brought into contact with the contact portion 29 of the cassette retracting member 25. At this time, just before one end of the tape cassette 1 comes into contact with the abutting part 29, the engaging part 28 at the tip of the cassette retracting member 25 pulls the tape cassette against its own elasticity and the elasticity of the leaf spring 30. 1, and is automatically engaged in one reel shaft insertion hole 27.

On the other hand, after one end of the tape cassette 1 is brought into contact with the contact portion 29 of the cassette retracting member 25, when the tape cassette 1 is subsequently inserted in the direction of arrow b in FIGS. 1A and 2A, the cassette retracting member 25 is The return spring 52 is pushed by the tape cassette 1 and biases the retraction operating lever 34 to rotate.
It is moved forward in the direction of arrow b against.

That is, the cassette retracting member 25 is pushed by the tape cassette 1 and moved forward in the direction of arrow b from the backward movement position shown in FIG. 3A. Then, the pin 41 of the cassette retracting member 25 pushes the retracting operation lever 34 and the switch operation lever 36, and these levers 34 and 36 are rotated in the directions of arrows d and h, respectively, in FIG. 3A. And at this time, the return spring 52
One end 52b is the protrusion 53 of the retraction operation lever 34.
Because it is pushed in the direction of arrow d in Fig. 3A by
The return spring 52 is twisted. As a result of the above, the cassette retracting member 25 resists the return spring 52 and moves to the third A.
It is moved forward in the direction of arrow b in the figure.

As shown in FIG. 3B, when the cassette retracting member 25 has been moved forward _a predetermined distance from the backward movement position in FIG. 3A (the position shown by the imaginary line in FIGS. 1A and 2A), the switch operation lever The operated element 44 of the cassette detection switch 43 is pushed in the direction of arrow c' by the switch operation cam 42 of 36, and the cassette detection switch 43 is turned on.

On the other hand, when the switch operating lever 36 is rotated in the direction of arrow h from the return position shown in FIG. 3A to the position shown in FIG. 3B, the switch operating lever 36
The engaged element 61 is rotated in the direction of arrow g from the return position shown in FIGS. 7A and 8A to the position shown in FIGS. It is pressed against the inclined surface 71. As a result, due to the guiding action of the inclined surface 71, the lock plate 6
0 is horizontally rotated in the direction of arrow e' in FIG. 7B against the return spring 67, and the engaged element 61 engages the engaging portion 72 of the lock plate 60 as shown in FIGS. 7B and 8B.
is engaged with. When the engaged element 61 is locked as shown in FIG. 7B, the cassette retracting member 25 is locked in that position via the switch operating lever 36.

When the cassette detection switch 43 is turned on, the motor 11 starts to rotate forward, and the first
At the same time as either one of the capstans 4 and 5 shown in Figure A is driven to rotate, the cam grooved gear 47 is driven to rotate in the direction of arrow i in Figure 3B, as will be described later. Then, the cam groove 48 of the cam grooved gear 47
The engaging element 49 is driven, and the retraction driving lever 35 is driven to rotate in the direction of arrow d in FIG. 3B. As a result, the return spring 52 is twisted as described above.
At the same time as the twist is restored, the protrusion 56 of the retraction drive lever 35 comes into contact with the protrusion 55 of the retraction operation lever 34 as shown in FIG. 3C.
is pressed, and the retraction operation lever 34 is moved to the third C.
It is forcibly rotated in the direction of arrow d in the figure. Then, the cassette retracting member 25 is forcibly moved forward in the direction of arrow b in FIG. 3C by the retracting operation lever 34 via the pin 41.

As a result, the engaging portion 28 of the cassette retracting member 25
1A and 2A.
The tape cassette 1, which has been automatically pulled in the direction of arrow b in the figure and inserted to the position indicated by the imaginary line in FIGS. 1A and 2A, is placed at a predetermined position in the cassette holder 2 as shown in FIGS. 1B and 2B. will be automatically drawn in. At this time, the switch operating lever 36 is also continuously rotated in the direction of arrow h in FIG. , so the cassette detection switch 4
3 is kept on until the tape cassette 1 is ejected.

On the other hand, when the switch operating lever 36 is rotated from the position shown in FIG. 3B to the position shown in FIG. 3C,
The engaged element 61 of the switch operation lever 36 moves from the position shown in FIGS. 7B and 8B to the position shown in FIGS. 7C and 8.
It continues to be rotated in the direction of arrow g to the position shown in Fig.
is disengaged from the engaging portion 72 and moved onto the inclined piece 73. Then, due to the guiding action of the inclined piece 73,
The lock plate 60 is pushed down by the engaged element 61, and the lock plate 60 is rotated in the direction of the arrow f' against the return spring 67 as shown by the solid line in FIG. 8C, and as shown in FIG. 7C. As shown by the solid line, the engaged element 61 is moved back in the direction of the arrow e by the force of the return spring 67, and the engaged element 61 rides on the lock plate 60 due to the relative movement at that time.

With the above steps, the series of operations for automatically drawing the tape cassette 1 into the cassette holder 2 is completed.

[Descent operation of tape cassette]

After the tape cassette 1 is automatically drawn into the cassette holder 2 as described above, the elevating drive frame 52 is moved in the direction of arrow a' in FIG. 2B around both fulcrum shafts 17 as described later. Driven to swing.
As a result, the hinge structure 23 of the lifting drive frame 15
At this point, the cassette holder 2 is pushed down, and the cassette holder 2 is lowered almost horizontally while being guided by the guided pins 18 and the guide grooves 20, until the cassette is installed as shown in FIG. 2C. mounted in position. Then, the tape cassette 1 is engaged with the capstans 4, 5, the reel shafts 9, 10, etc., and is positioned in a predetermined state. At this time, the 2nd C
As shown in the figure, as the tape cassette 1 is lowered, the engaging portion 28 of the cassette retracting member 25 is relatively removed from the reel shaft insertion hole 27 of the tape cassette 1. After the tape cassette 1 is installed in the cassette device position, the magnetic head 8 is inserted into the tape cassette 1 and comes into contact with the tape inside, as shown by the imaginary line in FIG. Either one of them is inserted into the tape cassette 1 and one of the capstans 4 or 5 is inserted into the tape cassette 1.
normal or reverse playback automatically starts.

[Tape cassette eject operation]

The ejecting operation of the tape cassette 1 is performed by the reverse operation of the automatic retracting and lowering operations of the tape cassette 1 described above.

That is, first, the lifting drive frame 15 is rotated in the direction of the arrow a in FIG. 2C, and the cassette holder 2 is moved to the second position B.
The cassette is raised and returned to the cassette insertion position shown in the figure. At this time, the engaging portion 28 of the cassette retracting member 25 is again engaged with the roll shaft insertion hole 27 of the tape cassette 1. Next, the retraction drive lever 35 is rotated in the direction of arrow d' in FIG. 3C, and the retraction operation lever 34 is rotated in the direction of arrow d' in FIG.
It is rotated in the direction d', and the cassette retracting member 25 is moved back in the direction of the arrow b' in FIG. 3C. As a result, the abutting portion 29 of the cassette drawing member 25 pushes the tape cassette 1 and automatically pushes the tape cassette 1 out of the cassette holder 2 in the direction of arrow b' in FIGS. 1A and 2A. At this time, the switch operation lever 36 is also rotated in the direction of arrow h' in Fig. 3C, and the engaged element 61 is also moved back in the direction of arrow g' in Fig. 7C. 61 slides on the lock plate 60, and the engaged element 6
1 is never engaged with the engaging portion 72. When the engaged element 61 has been returned to the return position shown in FIG. 7A, the lock plate 60 is rotated in the direction of the arrow f in FIG. 8C by the return spring 67, as shown in FIG. 8A. Returned to original position.

[Characteristics of automatic retraction mechanism]

According to the automatic retraction mechanism 33 described above, the engaged element 61 is provided on the switch operation lever 36, which is an interlocking member interlocked with the cassette retraction member 25.
A lock plate 60 is provided which is engaged with the engaged element 61 by an engaging portion 72 and prevents the engaged element 61 from moving back by the return spring 52.
is the arrow g in FIGS. 7A and 7B of the engaged element 61.
The guide path of the engaged element 61 is changed when moving forward in the direction of the arrow g' in FIG. The cassette retracting member 25 is pushed by the tape cassette 1 and moves forward a predetermined _distance from the backward movement position of FIG. 3A against the return spring 52 as shown in FIG. 3B. When the cassette detection switch 43 is turned on, the engaged element 61 is engaged with the engaging portion 72 of the lock plate 60 as shown in FIG. 7B, and the cassette retracting member 25 is moved at that position. The cassette retracting member 25 is configured to be locked, and from the time it is locked, the return spring 52 prevents the cassette retracting member 25 from moving back. Therefore, even if the tape cassette 1 is inserted into the cassette holder 2 by tapping it, the cassette retracting member 25 will not release the return spring 5.
2 and once the cassette detection switch 43 is turned on, the cassette retracting member 25 will not be moved back by the return spring 52, and the cassette detection switch 43 will be turned on. Since the tape cassette 1 is kept in the on state, even when the tape cassette 1 is inserted in this manner, the automatic retraction operation of the tape cassette 1 into a predetermined cassette holder 2 can always be carried out reliably.

[Structural explanation of operation switching mechanism]

Next, the operation switching mechanism 76 will be explained with reference to FIGS. 9 to 14D. The operation switching mechanism 76 is configured to selectively drive the automatic retracting mechanism 77 and the cassette lifting mechanism 14. .

First, in FIGS. 9 to 11D, the cam grooved gear 47 is rotatably attached to the outer periphery of a support shaft 77 vertically fixed on the mechanical board 3. As shown in FIGS. The outer peripheral gear of this cam grooved gear 47 is configured as a partially toothed gear 79 having a notch 78 formed in a part of its peripheral surface. On the other hand, a motor shaft 80 of the motor 11 mounted on the mechanical board 3 protrudes below the mechanical board 3.
A two-stage pulley 81 is fixed to the lower end of the pulley 81.
A belt 82 is wound between the lower pulley 81b of the two-stage pulley 81 and a capstan flywheel (not shown) that also serves as the pulley of both capstans 4 and 5, and the motor 11 It is configured to rotationally drive both capstans 4 and 5. The aforementioned lead stand drive, pinch roller pressure bonding mechanism drive, and azimuth automatic adjustment mechanism drive are configured to be driven by obtaining rotational force from the capstan flywheel or the like. The upper and lower ends of the intermediate portion between the motor 11 and the cam grooved gear 47 are connected to the mechanical board 3 and the sub-board 16.
An intermediate shaft 83 fixed to a part of the intermediate shaft 83 is disposed, and a first
A rotating body 84 is rotatably attached. A gear 85 and a pulley 86 are integrally provided at both upper and lower ends of the first rotating body 84, and a belt 87 is wound between the pulley 86 and the upper pulley 81a of the second-stage pulley 81. There is. Also, the intermediate shaft 8
A rocking body 89 is attached to the outer periphery of the upper half of the body 3 so as to be swingable in a horizontal plane about its intermediate shaft 83. A swing shaft 90 is vertically fixed to the lower part of one end of the swing body 89, and a second rotating body 91 is rotatably attached to the outer periphery of the swing shaft 90 and extends in the axial direction of the swing shaft 90. It is installed so that it can be moved freely. Gears 92 and 93 of different sizes and diameters are integrally provided on the upper and lower sides of the second rotating body 90, the upper gear 92 is always meshed with the gear 85, and the lower gear 93 is connected to the cam grooved gear 47. It is configured to selectively mesh with the partially toothed gear 79. Also, at the outer peripheral position of the swing shaft 90, the lower surface of the swing body 89 and the second
A friction plate 94 made of felt or the like is interposed between the rotating body 91 and the upper surface thereof. and second rotating body 9
1 is the upper part of a washer 95 fitted slightly above the lower end 90a of the swing shaft 90, and is pressed upward by a compression spring 96 fitted around the outer periphery of the swing shaft 90. Therefore, the second rotating body 91 is configured to be rotated while being in frictional contact with the rocking body 89 via the friction plate 94. Note that a balance weight 97 is fixed to the lower part of the end of the swing body 89 on the opposite side from the swing shaft 90, sandwiching the intermediate shaft 83 therebetween. Further, the lower end 90a of the swing shaft 90 is inserted into a swing regulation hole 98 provided in the mechanical board 3,
The swing shaft 90 has both ends 98a of its swing regulating hole 98,
98b, the swing range is restricted as shown in FIGS. 10A and 10B.

By the way, as mentioned above, the engager 49 of the retraction drive lever 35 is connected to the first cam groove 48 on the upper surface of the cam grooved gear 47 as shown in FIGS. 9 to 11D.
is engaged within. Note that both ends of the first cam groove 48 are formed as closed ends 48a and 48b.

Next, Figure 9, Figure 12, Figure 13A, Figure 13B
14A to 14D, a substantially spiral second cam groove 100 is also provided on the lower surface of the cam grooved gear 47. As shown in FIGS. Note that this second cam groove 1
Both ends of 00 are also formed as closed ends 100a and 100b. On the other hand, a control member 101 is rotatably attached to the lower part of the mechanical board 3 via a fulcrum shaft 102. The control member 101 has an approximately L-shape, and an engager 103, which is a roller rotatably supported on one end 101a, is inserted through an arcuate hole 104 provided in the mechanical board 3 and connected to the mechanical board. 3 of the cam grooved gear 47.
It is engaged within the cam groove 100.

Next, a lift drive lever 107 is integrally provided on one side of the other end of the lift drive frame 15. And the tip 10 of this elevation drive lever 107
7a is inserted through a long hole 108 provided in the mechanical board 3 and protrudes below the mechanical board 3. On the other hand, first and second sliding bodies 109 and 110 are attached to one side of the control member 101 at the bottom of the mechanical board 3 so as to be able to freely slide relative to each other. First, the first sliding body 109 has a substantially U-shape, with both ends 10
A pair of T-shaped protrusions 111 integrally projected upward from 9a and 109b are slidably engaged in a pair of elongated holes 112 provided in the mechanical board 3, and are attached to the mechanical board 3. . Also, the second sliding body 11
0 also has a U-shape, and this second sliding body 1
10 is assembled to be stacked on the lower part of the first sliding body 109 and engaged with a guide groove 113 provided in the first sliding body 109 so as to be slidable in the same direction as the first sliding body 109. Note that both these sliding bodies 10
The sliding direction of 9 and 110 is the same as that of the lifting drive lever 10.
This is a direction parallel to a vertical rotation plane centered on the fulcrum shaft 17 of No. 7. And these two sliding bodies 1
The other end 101b of the control member 101 and the tip 107a of the elevating drive lever 107 are inserted between one end 109a and 110a of the control member 101.
However, a tension spring 116 is stretched between protrusions 114 and 115 that are integrally provided at the bottom of one end 109a of the first sliding body 109 and the other end 110b of the second sliding body 110, respectively.

[Operation explanation of operation switching mechanism]

First, FIG. 10A shows a state in which ejection of the tape cassette 1 has been completed, and at this time the cam grooved gear 47 is locked at the ejection completion position _P1 . Note that when the loading operation of the tape cassette 1 starts, the cam grooved gear 47 shifts to the 10th A.
In the figure, it is rotated by 360 degrees in the direction of arrow i - an angle corresponding to the width of the notch 78, and is changed to the loading completion position _P2 shown in FIG. 10B.

By the way, in this ejected state, the 11th A
As shown in the figure and FIG. 14A, the gear 93 of the second rotating body 91 is located at the center of the notch 78,
The swing shaft 90 is in contact with one end 98a of the swing regulating hole 98.

In this ejected state, both sliding bodies 109 and 110 are urged to slide in the directions of arrows k and k' by the force of the tension spring 116, as shown in FIGS. 13A and 14A. And the first sliding body 109
Due to the sliding force in the direction of arrow k, one end 10
9a, the other end 101b of the control member 101 is pushed, and the control member 101 is urged to rotate in the direction of arrow m in FIG. 14A. On the other hand, at this time the control member 1
The engager 103 at one end 101a of 01 is connected to one closed end 10 of the second cam groove 100 as shown in FIG. 14A.
It is located at 0a. Then, the engagement element 103 is moved to the closed end 1 of the second cam groove 100 by a force F ₁ generated by the rotation force in the direction of the arrow m by the tension spring 116.
It is pressed against the side surface 100a' of 00a. However _, at this time, the force F ₁ is applied to a position offset by a distance ₂ to the left in FIG _. However, the cam grooved gear 47 is urged to rotate in the direction of arrow i' in FIG. 14A. The cam grooved gear 47 is the second cam groove 10.
0 to the engager 103 by the closed end 100a.
4A, the position shown in FIG. 14A, that is, the ejected completion position.
Locked at P ₁ .

Further, as shown in FIG. 13A, due to the sliding force of the second sliding body 110 in the direction of the arrow k' by the tension spring 116, one end 110a of the second sliding body 110 moves the vertical drive lever 1
The tip 107a of the tape cassette 1 is pushed, and the lift lever 107 is rotated in the direction of the arrow a in FIG. 13A, and as a result, as described above, the cassette holder 2 is inserted into the tape cassette 1 shown in FIG. 2A. Has been returned to elevated position.

Next, when the aforementioned cassette detection switch 43 is turned on, the motor 11 is driven to rotate forward in the direction of arrow n in FIG.
It is rotated in the direction of arrow o in the figure. The second rotary body 31 is rotationally driven by the gear 85 of the first rotary body 84 via the upper gear 92 in the direction of arrow q in FIG. 10A. However, at this time, the second rotating body 9
Due to the frictional action of the friction plate 94 interposed between the oscillating body 89 and the oscillating body 89, a rotational moment acts on the oscillating body 89 in the direction of the arrow o in FIG. are swung in the same direction.

Then, as shown in FIGS. 11B and 14B, the lower gear 85 of the second rotating body 91 is connected to the cam grooved gear 47.
The lower gear 85 rotates the cam grooved gear 47 in the direction of arrow i in FIGS. 11B and 14B through the partially toothed gear 79. At this time, the lower end 90a of the swing shaft 90 comes into contact with the other end 98b of the swing restriction hole 98, and the swing range of the swing body 89 in the direction of the arrow o is restricted.

As the cam grooved gear 47 is rotationally driven in the direction of arrow i, the engager 49 is guided by the first cam groove 48, and the retraction drive lever 35 is moved as shown in FIG. The tape cassette 1 is rotated in the direction d, and the retracting operation lever 34 is rotated in the same direction, thereby performing the automatic retracting operation of the tape cassette 1 described above.

On the other hand, when the retraction operation lever 34 is rotated in the direction of the arrow d in FIG. 11B, another engager 103 is also relatively moved within the second cam groove 100, but the retraction operation lever 34 is rotated in the direction of the arrow d in FIG. 11C. The control member 101 is not rotated until it reaches the forward movement position.

When the cam grooved gear 47 has rotated approximately 1/2 of its rotation angle, the retraction operation lever 34 reaches the forward movement position shown in FIG. Due to rotational drive,
This time, the engaging element 103 is guided by the second cam groove 100, and the control member 101 starts rotating in the direction of the arrow m in FIG. 14B. After this, the engaging element 49 is relatively moved within the first cam groove 48, but no turning force is applied to the retraction drive lever 35, and the retraction operation lever 34 is moved to the forward movement position shown in FIG. 11C. Well, it will be retained.

When the control member 101 is rotated in the direction of arrow m in FIG. 14B,
As shown in the figure, the other end 101 of the control member 101
b comes into contact with one end 110a of the second sliding body 110 and pushes it in the direction of arrow k. Then, the second sliding body 11
One end of the tension spring 116 is pulled in the direction of arrow k by the other end 110b of
In figure C, it is slid in the direction of arrow k. As a result, one end 109a of the first sliding body 109
7 in the direction of arrow k, the elevating drive lever 107 is rotated in the direction of arrow d' in FIG. 13B, and the above-described lowering operation of the cassette holder 2 to the cassette mounting position is performed.

When the cam grooved gear 47 has been rotated by a predetermined angle in the direction of the arrow i, the cam grooved gear 47 reaches the loading completion position P ₂ as shown in FIGS. 11C and 14C, and the partially toothed gear 79 is connected to the lower gear 9 of the second rotary body 91 by the notch 78.
3 and is automatically stopped at that position.

When the cam grooved gear 47 reaches the loading completion position _P2 , it is locked at that position again by the rotational force of the control member 101, as shown in FIG. 14C.

That is, the control member 101 always receives a rotational force in the direction of the arrow m' due to the tension reaction force of the tension spring 116 in the direction of the arrow k. As a result, engager 1
03 is the closed end 100b of the second cam groove ₁₀₀ due to the force F2 generated by the rotational force in the direction of the arrow m'.
is pressed against the side surface 100b'. However, at the time of levering, the force F ₂ is applied to the center of the cam grooved gear 47 at the first
Acted at a position shifted by a distance of ₃ to the upper side of Figure 4C,
As a result, a rotational moment due to F ₂ × ₃ acts on the cam grooved gear 47, and the cam grooved gear 47 is urged to rotate in the direction of arrow i in FIG. 14C. At this time, the cam grooved gear 47 is connected to another engager 49 by the closed end 48b of the first cam groove 48.
It is abutted from the direction of arrow i in the figure and locked at the loading completion position _P2 shown in FIG. 14C. At this time, the closed end 1 of the second cam groove 100
It is also possible to lock the cam grooved gear 47 by bringing the cam grooved gear 47 into contact with the engaging element 103, but since the engaging element 49 is further away from the center of the cam grooved gear 47 in the radial direction, the cam groove This is preferable because the attached gear 47 can be strongly locked.

Next, when ejecting as described above, the motor 1
1 is rotated in the opposite direction in the direction of arrow n' in FIG. 10B. Then, due to the reverse operation during loading mentioned above,
While the lower gear 93 of the second rotating body 91 is rotationally driven in the direction of the arrow q' in FIGS. 11D and 14D,
The cam grooved gear 47 is swung in the direction of arrow o' and meshed again with the partially toothed gear 79 of the cam grooved gear 47.
7 is rotated in the direction of arrow i' in FIGS. 11D and 14D. As a result, the lift drive lever 107
is rotated in the direction of the arrow a in FIG. 13B, and the cassette holder 2 is raised and returned to the cassette insertion position as described above.Subsequently, the retraction drive lever 35 and the retraction operation lever 34 are moved in the direction of the arrow a in FIG. 11D. The tape cassette 1 is rotated in the direction d', and the tape cassette 1 is automatically pushed out as described above.

[Features of operation switching mechanism]

According to the operation switching mechanism 76 described above, the first rotating body 84 is driven by the motor 11 to rotate in forward and reverse directions, and the gear 93 is oscillated according to the rotational direction of the first rotating body 84. A second rotating body 91 having
A swing regulating hole 98, which is a regulating means for regulating the swing range of the second rotating body 91, and a retraction drive lever 35 and an elevation drive lever 107, which are operated members.
A cam grooved gear 47, which is a third rotating body, has a partially toothed gear 79 that selectively meshes with the first and second cam grooves 48, 100 that drive the cam and the gear 93 of the second rotating body 91. It consists of a positioning means (for example, a locking function by the engager 103 and the second cam groove 100) that positions the grooved gear 47 at the ejection completion position P ₁ and the loading completion position P ₂ , respectively, and By swinging the second rotating body 91 by reverse rotational driving and selectively meshing the gear 93 of the second rotating body 91 with the partially toothed gear 79 of the cam grooved gear 47, the cam grooved gear 4
7 is selectively driven in forward and reverse rotation, and the first and second cam grooves 48, 100 drive the retraction drive lever 35 and the elevation drive lever 107. Even without using an auxiliary device that provides a rotational trigger, by simply driving the motor 11 in forward and reverse rotation, the partially toothed gear 79 can be selectively driven to rotate and a predetermined switching operation can be performed. Therefore, the simplification of the structure,
Cost reduction can be achieved. Further, the gear 93 of the second rotary body 91 is always reliably engaged with the toothless gear 79 of the cam grooved gear 47 by the forward and reverse rotational drive of the motor 11, and the toothless gear 79 is reliably driven. is always performed reliably.

Note that it is also possible to change the configuration so that the first rotating body 84 and the second rotating body 91 are interlocked by a belt, and the second rotating body 91 is swung according to the rotational direction of the first rotating body 84.

Further, according to this operation switching mechanism 76, a cam grooved gear has a second cam groove 100 with both ends closed, and is configured to be rotationally driven at a predetermined angle by a second rotating body 91 that is a drive source. 47 and its second
A control member 101 configured to be engaged with a cam groove 100 via an engager 103 and displaced by rotation of a cam grooved gear 47, and the control member 1
It consists of a lift drive lever 107, which is an operated member configured to be linked to the displacement of 01, and when the lift drive lever 107 is moved to the operating position shown in FIG. 13A or 13B, it is The force of the tension spring 116, which is a spring, is applied to the engager 103 via the control member 101, and the engager 1
03 is the closed end 100a, 10 of the second cam groove 100.
By pressing the side surfaces 100a' and 100b' of 0b, the cam grooved gear 47 is moved in the direction indicated by the arrow i in Fig. 14A.
At the same time, the engaging element 103 is brought into contact with the closed ends 100a, 100b of the second cam groove 100, and the cam grooved gear 47 is locked at that position. Therefore, a locking device as an auxiliary device for locking the cam grooved gear 47 at a predetermined position is not required, and the structure can be simplified and costs can be reduced.

[Characteristics of the entire cassette retraction and attachment mechanism]

According to the cassette retracting and mounting mechanism described above,
Automatic retraction of tape cassette 1 into cassette holder 2 and subsequent retraction of tape cassette 1 into cassette holder 2
The loading operation, which consists of the lowering operation, and the ejecting operation, which is the opposite thereof, can be performed quietly and mechanically with slow movements by the forward and reverse rotation drive of the motor 11 and the cam grooves of the cam grooved gear 47. . Therefore, no unpleasant impact noise is generated during loading or ejecting, and soft loading and soft ejecting are realized with a simple structure and a highly reliable structure.

In addition, as will be described later, the cassette detection switch 43
The forward and reverse rotation of the motor 11 is controlled by turning on and off, and the soft loading and soft ejecting can be performed only by driving the motor 11 to rotate forward and backward.
Soft loading and soft ejecting can be performed by remote control (operating a remote switch) from the rear seat.

Also, soft loading and soft ejecting are performed using the capstan drive motor 11, and no special motor or electromagnetic device is used, resulting in an extremely low-cost loading mechanism.

[Description of drive system]

Next, according to FIG. 15, both the capstans 4,
5 and the drive system of both reel shafts 9 and 10 will be explained.

First, the motor 11 constitutes a capstan driving motor as described above. The belt 82, which is wound around a pulley 81 fixed to a motor shaft 80 of the motor 11, is attached to a pair of flywheels 1 fixed to both capstans 4 and 5.
25, 126 in an anti-rolling manner. Therefore, both capstans 4 and 5 are configured to be driven to rotate in the forward and reverse directions via the belt 82 by driving the motor 11 to rotate in the forward and reverse directions.

Next, both flywheels 125, 126 have inner gears 127, 128 and outer gears 129, 13, respectively.
0 are provided integrally, and both reel shafts 1
Reel base gears 131 and 13 are provided on the outer peripheries of 0 and 9, respectively.
2 are provided integrally.

During normal playback, the normal idler 135 is engaged with the inner gear 127 of one of the flywheels 125 and the reel base gear 131 of one of the reel shafts 10 while the motor 11 is driven to rotate in the forward direction. flywheel 1
One reel shaft 10 is rotated using the rotational torque of 25.
It is configured to rotate.

In addition, during reverse playback, the reverse idler 13 is also
7 to the inner gear 12 of the other flywheel 126
8 and the reel base gear 132 of the other reel shaft 9, the other reel shaft 9 is configured to be rotationally driven using the rotational torque of the other flywheel 126.

In addition, during fast forwarding or rewinding, an idler 139 disposed between both reel base gears 131 and 132 is selectively engaged with the outer peripheral gear 129 of one flywheel 125 and the reel base gear 131 of one reel shaft 10, or the other flywheel 12
By selectively meshing the outer gear 130 of No. 6 with the reel base gear 132 of the other reel shaft 9, both reel shafts 10 and 9 can be selectively driven at high speed while the motor 11 is driven in the forward rotation. It is configured to be rotationally driven.

Therefore, according to this car stereo, normal playback and reverse playback, all tape running operations such as fast forwarding and rewinding in the normal running state, fast forwarding and rewinding in the reverse running state, and the cassette of the tape cassette 1 described above are possible. The tape cassette 1 is loaded into the mounting position by forward rotation of the capstan drive motor 11, and by reverse rotation of the motor 11, the tape cassette 1 is loaded into the cassette insertion position. It is configured to perform an eject operation. The idlers 135, 137, 139 are supported by swing arms 140, 141, 142, respectively, and are configured to swing.

[Explanation of electrical control system]

The war story control system will be explained with reference to FIG.

A cassette retention detection switch 2 that detects removal of the tape cassette 1 from the cassette holder 2
00 is a leaf spring 2 that elastically presses one side of the tape cassette 1 inserted into the cassette holder 2.
It is turned on and off by the end of 2. When the tape cassette 1 is removed from the cassette holder 2 and not held, it is in the on state, and when it is inserted and held, it is in the off state.

However, tape cassette 1 is placed in cassette holder 2.
cassette holding detection switch 200 held within the cassette holding detection switch 200
In the off state, push button switch 2 for switching modes for playback (PLAY), fast forward (FF), rewind (REW), and eject (EJECT) is pressed.
One terminal side of 01 to 204 is kept at ground potential. Further, the inhibit signal, which becomes an "H" signal, is applied as an input to the mutual reset circuit 205 to put the mutual reset circuit 205 into a non-operating state.
When the cassette holding detection switch 200 is in the OFF state, the signal is in the "L" state of the ground potential. In other words, the non-operating state is released and the mutual reset circuit 205 becomes the operating state. Therefore, when each push button switch 201 to 204 is pressed to instruct mode switching, the other end is grounded due to the temporary ON state. A potential "L" signal is formed. This "L" signal is inverted to an "H" signal through the respective NOT circuits NOT1 to NOT4, and is applied to the mutual reset circuit 205. In the mutual reset circuit 205 which has been released from the non-operating state and is now in the operating state,
The "H" signal sets the playback (PLAY), fast forward (FF), rewind (REW), and eject (EJECT) mode operations. Of the operational flip-flop circuits FF1 to FF4, the eject (EJECT) operational flip-flop circuit FF4 A reset input is applied to the flip-flop circuits FF1 to FF3 by a mutual reset operation, and each Q output is reset to an "L" signal. In addition, with a slight delay in time from this reset input, the pressed buttons 201 to 201 are pressed.
A set input is applied to the operational flip-flop circuits FF1 to FF4 corresponding to the switching mode indicated by 204, and the Q output thereof is set to become an "H" signal to set the mode operation. The Q outputs of the respective operational flip-flop circuits FF1 to FF4 are given to the system control circuit 206, and the system control circuit 206 receives the Q outputs that become "H" signals from the operational flip-flop circuits FF1 to FF4, etc.
A predetermined mode switching operation is performed by.

Note that when the tape cassette 1 is not held in the cassette holder 2 and the cassette holding detection switch 200 is in the on state, an inhibit signal that becomes an "H" signal is applied as an input to the mutual reset circuit 205, and the mutual reset circuit 205 is brought into a non-operating state. Even if the press switches 201 to 204
Flip-flop circuit that operates even when pressed
FF1 to FF4 are not set to set the mode operation.

Next, remote operation control, one-cycle reverse control, and accessory key-off eject control will be sequentially explained.

() Remote control (remote control) Playback (PLAY), fast forward (FF) and rewind (REW) operation flip-flop circuit FF1
A part of the "H" signal given as a set input to FF3 is also given as an input to each OR circuit OR1. It is then applied as a set input to an operating flip-flop circuit FF5 which sets the forward rotation drive operation of the capstan drive motor 11 through the OR circuit OR1, and its Q output is set to be an "H" signal. The Q output that becomes the “H” signal of this operational flip-flop circuit FF5 is:
When the accessory power supply Acc+B, which is the other input of the AND circuit AND1, is in the "H" signal state, it is given as a signal to the motor control circuit 207 to drive the motor 11 in the forward rotation through the AND circuit AND1. Then, the forward rotation drive of the capstan drive motor 11 is started.

On the other hand, as described above, by driving the motor 11 in forward rotation, normal and reverse playback, all tape running such as fast forwarding and rewinding in normal and reverse running states, and loading operation are performed. Therefore, by driving the motor 11 in forward rotation, the tape cassette 1 is loaded, and then the playback (PLAY), fast forward (FF) or rewind (REW) set by the set input from the mutual reset circuit 205 is performed. Operation of flip-flop circuit FF1 to FF
3 and the system control circuit 20 based on the Q output or output of the "H" signal of the designated flip-flop circuit FF7 which specifies the tape running direction, which will be described later.
By the predetermined mode switching operation 6, normal playback, reverse playback, fast forwarding or rewinding in a normal running state, or fast forwarding or rewinding tape running in a reverse running state is performed.

Further, a part of the "H" signal applied from the OR circuit OR1 as a set input to the operational flip-flop circuit FF5 of the motor 11 is applied as a reset input to the operational flip-flop circuit FF4 of the eject (EJECT) through the diode D1.
The Q output is reset to become an "L" signal. Note that this operation flip-flop circuit FF4
NOT is also caused by the cassette detection switch 43, which is turned on when loading the tape cassette 1 and turned off when the tape cassette 1 is ejected, turned off.
“H” through circuit NOT5 and diode D2
A reset input, which is a signal, is applied and reset.

When the EJECT push button switch 204 is pressed, each of playback (PLAY), fast forward (FF) and rewind (REW) is activated by the mutual reset operation by the mutual reset circuit 205 as described above. Operation flip-flop circuit FF
1 to FF3 are reset, and the EJECT operation flip-flop circuit FF4 is reset.
A set input is applied to the Q output, and the Q output is set to become an "H" signal. Also, a part of the set input that becomes the "H" signal is applied as a reset input to the operational flip-flop circuit FF5 of the motor 11, and its Q output is reset to become the "L" signal.

Therefore, an "L" signal is applied to the motor control circuit 207 through the AND circuit AND1, and the forward rotation of the capstan drive motor 11 is stopped. In addition, the Q output that becomes the “H” signal of the operating flip-flop circuit FF4 of EJECT is AND
When an "H" signal is applied to the other input of the circuit AND2 due to the ON state of the cassette detection switch 43, the signal is applied to the motor control circuit 207 through the AND circuit AND2 as a signal for driving the motor 11 in reverse rotation. Then, reverse rotation driving of the capstan drive motor 11 is started. As a result, the eject operation is performed as described above,
Tape cassette 1 is ejected.

Then, upon completion of ejecting the tape cassette 1, the cassette detection switch 43 is turned off.
An "L" signal is applied to the motor control circuit 207 through the AND circuit AND2, and the reverse rotation drive of the motor 11 is stopped.

Note that even if ejecting is completed and the cassette detection switch 43 is turned off due to timing adjustment, the "L" signal is immediately sent to the motor control circuit 207 through the AND circuit AND2 by the time constant circuit made up of the capacitor C1 and the resistor R1. cannot be given to

Therefore, in the case of remote control, the playback (PLAY), fast forward (FF), rewind (REW), and eject (EJECT) push button switches 201 to
204, and furthermore, direction (DIR), which will be described later.
By providing an output from a remote control receiving circuit (not shown) to the push button switch 208 for changing the tape running direction, remote control can be easily realized.

As described above, when the tape cassette 1 is not held in the cassette holder 2 and the cassette holding detection switch 200 is turned on, the mutual reset circuit 205 receives an inhibit signal that becomes an "H" signal as an input, and is disabled. It becomes operational. Therefore, the tape cassette 1 is the cassette holder 2.
This makes it possible to prevent the loading operation when the device is not held within the device, making it easier to use, especially when performing remote control.

() One-cycle reverse control One-cycle reverse control basically means that when the tape cassette 1 is inserted into the tape holder 2 and loaded, the tape is first rewound to the tape top for normal playback, and then the tape is When the end is reached, the tape is played in reverse, and when the tape returns to the top, the tape cassette is ejected. This control is performed by the system control circuit 206 by turning on the one-cycle reverse switch 209.

Next, when the one-cycle reverse switch 209 is turned on, the ejected tape cassette 1 is removed from the cassette holder 2 at the cassette insertion position, and then the tape cassette 1 is inserted into the cassette holder 2 again.
When inserted inside and loaded etc.
A case in which the tape cassette 1 which has been ejected from the cassette holder 2 is not removed from the cassette holder 2 and is loaded again will be described.

Power is always supplied to the detection flip-flop circuit FF6 for storing the state of removal of the tape cassette 1 from the cassette holder 2, the designation flip-flop circuit FF7 for designating the tape running direction, and the like.

() In the former case (when tape cassette 1 is removed from cassette holder 2 and then inserted again into cassette holder 2) When tape cassette 1 is removed from cassette holder 2, cassette retention is detected. In order to turn on the switch 200, a set input that becomes an "H" signal is applied to the detection flip-flop circuit FF6, and its Q output is set to become an "H" signal. The "H" signal of this Q output is given as a set input to a set-priority-T type flip-flop circuit FF7 for specifying the tape running direction, and its Q output is
The output is set to specify an "H" signal, that is, the normal tape running direction. This Q output, which becomes an "H" signal, is given to the system control circuit 206, and a predetermined mode switching operation based on the normal tape running direction is performed.

On the other hand, “H” of the detection flip-flop circuit FF6
When the Q output, which becomes a signal, is given as one input of the NAND circuit NAND1, and an "H" signal is given as the other input due to the ON state of the cassette detection switch 43, the rewind (REW) NOT circuit is passed through the diode D3. An “L” signal is given as an input to NOT3. Then, as mentioned above, the NOT circuit NOT3 and the mutual reset circuit 205
The rewind (REW) operation flip-flop circuit FF3 is set through the rewind (REW) operation flip-flop circuit FF3, and the other operation flip-flop circuits FF1, FF2, FF4 are reset, and the OR circuit OR1, the operation flip-flop circuit FF5 of the motor 11, and the AND circuit AND
1 and the motor control circuit 207, the capstan drive motor 11 starts to rotate in the forward direction.
As a result, the tape cassette 1 is loaded, and after the loading is completed, the tape cassette 1 is rewound (REW).
The Q output becomes the "H" signal of the flip-flop circuit FF3, and the Q output becomes the "H" signal of the flip-flop circuit FF7 for specifying the tape running direction.
Depending on the output, the system control circuit 206 performs a predetermined rewind mode switching operation even in a normal running state. Thereafter, tape rewinding is performed in a normal running state. By the way, the system control circuit 206 uses the flip-flop circuit FF7 to specify the tape running direction. Therefore, a predetermined mode switching operation is performed depending on the reverse tape running direction.

Note that when the cassette detection switch 43 is turned on, the playback (PLAY) NOT circuit NOT1 is activated through the NOT circuit NOT6 and the capacitor C2.
A differential waveform "L" signal is applied to the input of the differential waveform. However, the rewind (REW) that overlaps in time does not
Since the "L" signal applied to the input of the circuit NOT3 is a temporally long signal, the reproduction (PLAY) operation setting is not performed by the "L" signal of the differential waveform.

Further, a trigger input is applied to the flip-flop circuit FF7 for specifying the tape running direction from the system control circuit 206 through the OR circuit OR2 when the end of the tape or the top of the tape is detected during playback or fast forwarding. The Q output and the output are inverted due to the rise of this trigger input, and the designation of the tape running direction is inverted.

Therefore, in this case, when loading is completed, the tape is first rewound and when it returns to the top of the tape, it is played normally, then when it reaches the end of the tape, it is played in reverse, and finally it returns to the top of the tape. In this case, tape cassette 1 will be ejected.

In addition, as a trigger input for the flip-flop circuit FF7 that specifies the tape running direction, the direction (DIR) push button switch 2 is input through the OR circuit OR2.
It is also given when 08 is pressed. As an input to the OR circuit OR2, the designated flip-flop circuit is used when the tape cassette 1 is removed from the cassette holder 2 and the cassette holding detection switch 200 is turned on.
In order to prevent the Q output and output of FF7 from being inverted, an inhibit signal that becomes an "H" signal is provided. Therefore, designation of the tape running direction by pressing the direction (DIR) push button switch 208 is performed while the cassette holding detection switch 200 is in the OFF state.

Note that the detection flip-flop circuit FF6 includes:
EJECT operation flip-flop circuit FF4 is set through OR circuit OR3,
A portion of the Q output that becomes the "H" signal is given as a reset input. That is, the setting of the operational flip-flop circuit FF4 causes the capstan drive motor 11 to be driven in reverse rotation, and the eject operation moves the cassette holder 2 back to the cassette insertion position of the tape cassette 1, thereby providing a reset input. Also, when the tape end or tape top is detected by the system control circuit 206 through the OR circuit OR3 during playback and fast forwarding, a portion of the trigger input that becomes the "H" signal given to the flip-flop circuit FF7 specifying the tape running direction is also reset input. given as. These enable the detection flip-flop circuit to
FF6 is reset so that its Q output becomes an "L" signal.

() In the latter case (when tape cassette 1 is not removed from cassette holder 2) If tape cassette 1 is not removed from cassette holder 2, the cassette retention detection switch 200
remains off. Therefore, the detection flip-flop circuit FF6 is not given a set input that becomes an "H" signal, and its Q output remains in the reset state of an "L" signal.

Therefore, the tape running direction designating flip-flop circuit FF7 is not set and remains in the state it was in when the tape cassette 1 was ejected. This allows the specified flip-flop circuit FF
For example, if the output is an “H” signal by the Q output or output of the “H” signal by 7,
The system control circuit 206 performs a predetermined mode switching operation based on the reverse tape running direction, which is the same as when the tape was ejected.

Note that since the Q output of the detection flip-flop circuit FF6 is kept at the "L" signal, the NAND circuit
An "L" signal is not applied to the rewind (REW) NOT circuit NOT3 through the NAND1 and the diode D3. Furthermore, when the cassette detection switch 43 in which the tape cassette 1 is loaded is turned on, the "L" signal of the differential waveform is output through the NOT circuit NOT6 and the capacitor C2 for playback (PLAY).
It is applied as an input to the NOT circuit NOT1, and the playback (PLAY) operation flip-flop circuit FF1 is set. As a result, the loaded tape cassette 1 runs in the tape running direction when the tape is ejected without being rewound.

Therefore, in this case, if the tape is ejected without being rewound, for example, if the tape was ejected during reverse playback, then reverse playback tape run is started and reverse playback is started. Playback occurs. If you return to the tape top, tape cassette 1
will be ejected.

Note that when the one-cycle reverse switch 209 is in the OFF state, the operation is performed in the same manner as in the above item (), except that since ejection is not performed, the tape running for normal playback and the tape running for reverse playback are alternately repeated.

() Accessory key-off eject control When the potential of the accessory power supply Acc+B decreases and becomes an "L" signal state, the capacitor C3, which was in a discharged state, is gradually charged by the NOT circuit NOT7, which receives the partial voltage as an input. be done. Then, within a certain period of time until the terminal potential reaches the predetermined potential after being charged, the NOT circuit NOT
The "H" signal of the output of 8 is maintained. That is, since the "L" signal is not applied to the input of the NOT circuit NOT4 of the eject (EJECT), the operation flip-flop circuit FF4 of the eject (EJECT) is not set and the eject operation is not performed. In other words, the accessory power supply is supplied by capacitor C3.
This delays the detection of the potential drop in Acc+B. Then, within a certain period of time, the accessory power supply Acc+
When B recovers to its original potential, that is, to the "H" signal state, the terminal potential of capacitor C3 is discharged without reaching the predetermined potential, so no eject operation is performed. Therefore, when the engine key is turned to the starter motor ON position to turn the starter motor and start the engine, the accessory power supply Acc
Eject operation due to +B being temporarily at a low potential or 0V is prevented.

Note that when the accessory power supply Acc+B becomes a low potential or 0V, the forward rotation drive of the motor 11 is stopped through the AND circuit AND1 and the motor control circuit 207.

Also, if the accessory power supply Acc+B is in a low potential or OV state for a certain period of time, the capacitor C
3 is sufficiently charged and its terminal potential reaches a predetermined potential, and the NOT circuit of EJECT is connected through NOT circuit NOT8 and diode D4.
An "L" signal is applied to the input of No. 4. And the operating flip-flop circuit of EJECT
FF4 is set, reverse rotation driving of the motor 11 is started through the AND circuit AND2 and the motor control circuit 207, and the tape cassette 1 is automatically ejected.

Although the embodiments of the present invention have been described above, various effective modifications can be made based on the technical idea of the present invention.

Effects of the Invention The present invention has the following effects.

When the bistable means is in one state, for example, if it is specified that the tape run starts with rewinding in the normal running state, the user will want to obtain normal playback from the top of the tape. If a tape cassette that has been ejected is removed from the tape holding member, and then the tape cassette is inserted and loaded again because the tape cassette is replaced, etc., the playback will automatically start from normal playback from the tape top. It will be done. In addition, if a tape cassette is reloaded without being ejected in a state where the user would like to play the continuation of the previous playback, etc., without removing it, the tape running direction at the time of ejecting the tape cassette may be changed. Then the tape starts running and the continuation of the previous step is obtained, which is extremely convenient for the user.

Therefore, even if a newly inserted tape cassette is partially wound, the reverse type cassette tape recorder according to the present invention automatically rewinds the tape to the top and then resumes normal playback. Therefore, a new tape cassette can always be played from the first track. Also,
If you eject the song and then load it again without removing it, you can continue playing the next song in the same playback direction as when you ejected, making it very convenient to use. be able to.

The cassette holding member in the present invention is, for example, the cassette holder 2 in the embodiments, the cassette holding detection means in the present invention is, for example, the cassette holding detection switch 200 in the embodiments, and the bistable means in the present invention is, for example, the cassette holding detection switch 200 in the embodiments. This is the detection flip-flop circuit FF6 in the example.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a car stereo, in which FIGS. 1A and 1B are plan views illustrating the automatic retraction operation of the tape cassette, and FIGS. 2A to 2C are diagrams showing the tape cassette. 3A to 3C are plan views illustrating the driving operation of the cassette retracting member by the automatic retracting mechanism, and FIG. An exploded perspective view illustrating the relationship between the operating lever, the retraction drive lever, and the cam grooved gear part, Fig. 5 is a side view of the same as the above in an assembled state, and Fig. 6 is an exploded perspective view of the switch operating lever and the lock plate as above. , FIGS. 7A to 7C are plan views for explaining the locking operation by the locking mechanism, FIGS. 8A to 8C are side views of the same, FIG. 9 is a sectional view of the operation switching mechanism, and FIG.
Figure A and Figure 10B are plan views showing the same eject completion state and loading completion state;
Figures 1A to 11D are plan views illustrating the driving operation of the retraction operation lever and the retraction drive lever;
Figure 2 is an exploded perspective view illustrating the relationship between the cam grooved gear, sliding body, control member, and elevation drive lever portion, and Figures 13A and 13B are side views illustrating the driving operation of the elevation drive lever; Figure 14A ~ 1st
4D is a plan view illustrating the driving operation of the elevation drive lever and the locking operation of the cam grooved gear by the control member; FIG. 15 is a plan view illustrating the drive system;
The figure is a block circuit diagram explaining the electrical control system. Further, in the symbols used in the drawings, 1... tape cassette, 2... cassette holder, 200...
...cassette holding detection switch, FF6...detection flip-flop circuit.

Claims (1)

[Scope of Claims] 1 (a) A cassette holding member for tape cassette loading that is reciprocally movable between a cassette insertion position and a cassette mounting position of the tape cassette; (c) cassette holding detection means for detecting removal of the tape cassette which has been ejected from the cassette holding member; bistable means that is reversed to the other state by moving the holding member back from the cassette mounting position to the cassette insertion position; When a new tape cassette is inserted and loaded in the ejected state, the tape is rewound to the tape top and then starts running in a predetermined direction, and the ejected tape cassette is reloaded. A reverse type cassette tape, characterized in that the reverse type cassette tape is provided with control means for controlling tape running so as to start tape running when ejecting when the bistable means remains set in the other state after being loaded. recorder.