JP3403553B2 - Cassette tape player - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette tape player, and more particularly to a mounting structure for fixing a tape cassette transfer mechanism to a chassis.

[0002]

2. Description of the Related Art Generally, in an on-vehicle cassette tape player, the tape cassette is automatically loaded at a performance position by merely inserting the tape cassette halfway.
A cassette transfer mechanism is employed that automatically ejects the tape cassette at the playing position to the insertion position after the performance.

Conventionally, as such a cassette transfer mechanism, a cassette holder is swingably supported between a pair of side plates, and the cassette holder is driven by rotation of a motor via a cam mechanism or the like, whereby the cassette holder is moved. It is known that the tape cassette held by the tape can be moved up and down. Such a cassette transfer mechanism is mounted on the chassis on which the head base is placed. At that time, one side plate is fixed to the chassis while keeping a predetermined gap, and the magnetic head mounted on the head base is attached to the one side plate. It can be moved directly below. A circuit board is fixed upright at the rear end of the chassis, which is the inner part of both side plates, and the other end of the flexible printed circuit board whose one end is connected to the magnetic head passes through the outside of one side plate. Connected to the circuit board.

[0004]

In the above-mentioned conventional cassette tape player, it is necessary to secure a moving space for the magnetic head between the chassis and the cassette transfer mechanism. Therefore, one side plate is bent to have an L-shaped cross section. A mounting structure has been used in which the horizontal portion of this side plate is screwed to the chassis via a spacer having a predetermined thickness.
However, the side plate having an L-shaped cross section does not have sufficient rigidity, and the deformation of the side plate may cause the cassette transfer mechanism to not operate smoothly.

The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to be able to firmly attach the transfer mechanism of the tape cassette to the chassis and to connect the magnetic head and the circuit board. Another object of the present invention is to provide a cassette tape player that facilitates handling of flexible printed circuit boards.

[0006]

In order to achieve the above object, according to the present invention, a head base having a magnetic head fixed thereon is placed on a chassis, and a pair of side plates are installed to face each other with a predetermined interval. A cassette tape player in which a cassette holder for holding a tape cassette is swingably disposed between the both side plates, and a circuit board arranged in the inner part of the side plate and the magnetic head are connected via a flexible printed circuit board. In the above, a pair of vertical portions and a horizontal portion bridging the vertical portions are provided on one of the both side plates, and a notch through which the flexible printed circuit board can be inserted is formed from the middle to the rear end of the horizontal portion. , With the most major features. In the above structure, an overhanging portion projecting above the circuit board is formed at the rear end of the vertical portion, and the overhanging portion is locked to the upper end of the circuit board. Further, leg pieces projecting downward from the horizontal portions are formed on the vertical portions located outside the flexible printed circuit board, and lower ends of the leg pieces are locked to the chassis.

[0007]

When a pair of vertical portions and a horizontal portion bridging these vertical portions are provided on one side plate, the side plate becomes concave in cross section,
Its rigidity is increased. Also, when removing the side plate from the chassis for repair work, etc., there are notches through which the flexible printed circuit board can be inserted from the middle of the horizontal part to the rear end, so both ends of the flexible printed circuit board are connected to the circuit board and the magnetic head. The side plate can be removed from the chassis even if it is left as it is.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 19 illustrate a cassette tape player according to an embodiment of the present invention. FIG. 1 is a plan view of an eject completed state, FIG. 2 is a left side view thereof, and FIG. 3 is a right side view thereof. 4 is its front view, FIG. 5 is its rear view, FIG. 6 is a perspective view of the bracket, FIG. 7 is a plan view of the tape cassette mounted state, FIG. 8 is its right side view, and FIG. 9 omits the cassette transfer mechanism. 10 is a plan view of the head base, FIG. 11 is a plan view of the select lever, FIG. 12 is a bottom view of the chassis seen from the back side, FIG. 13 is a cross-sectional view of the reel stand, and FIG. 14 is mode selection. FIG. 15 is a bottom view of the lever, FIG. 15 is a plan view seen from the surface side of the support plate, FIG. 16 is a cross-sectional view showing a power transmission mechanism of the sub motor, and FIG. 17 is an explanatory diagram of a planetary gear mechanism provided in the power transmission mechanism. 18 is an exploded perspective view showing a main part of the power transmission mechanism, 19 is an explanatory view showing a power switching operation of the power transmission mechanism.

In these drawings, reference numeral 1 is a flat chassis, and a main motor 2 which rotates at a constant speed in one direction and a sub motor 3 which rotates in both directions are attached to the front surface side of the chassis 1. The cassette transfer mechanism 4 is mounted. As shown in FIGS. 1 to 8, the cassette transfer mechanism 4 includes a pair of side plates 5 and 6 fixed to the chassis 1, a slide plate 7 disposed outside one side plate 5, and both side plates 5. It is provided with a plate base 8 rotatably held between 6 and a cassette holder 9 connected to the tip of the plate base 8, and is operated by using the sub motor 3 as a drive source. A guide hole 5a and a pair of guide protrusions 5b are formed in the one side plate 5, and a cam hole 7a and a pair of long holes 7b are formed in the slide plate 7, and each long hole 7b is guided. The slide plate 7 is held by the side plate 5 so as to be able to move forward and backward by being guided by the protrusion 5b. At the lower end of this slide plate 7, the block body 1
0 is held integrally with the slide plate 7 by a tension spring 11, and a first rack 10a is engraved on the outer surface of the block body 10.

As shown in FIG. 6, the other side plate 6 of the both side plates 5, 6 (hereinafter referred to as a bracket) is
It has a pair of vertical portions 98, 99 and a horizontal portion 100 bridging the vertical portions 98, 99, and these are integrally bent to have a concave cross section. Both vertical parts 98, 9
Overhanging portions 98a and 99a projecting upward are formed at the rear end of 9, respectively, and a pair of leg pieces 99b projecting below the horizontal portion 100 is formed on the outer vertical portion 99. Further, the horizontal portion 100 is formed with a notch 101 reaching from the center to the rear end, and a pair of screw holes 100a are formed. The bracket 6 configured as described above is provided with the pair of screws 1 inserted into the screw holes 100a.
By tightening 02, the horizontal part 100 is fixed on the chassis 1, but the outer vertical part 99 is fixed.
Since the lower ends of the two leg pieces 99b formed in 1 are also locked to the chassis 1, the fixing strength of the bracket 6 to the chassis 1 is enhanced. Further, in this mounted state, a space for moving a pinch roller and a magnetic head described later is defined between the chassis 1 and the horizontal portion 100.

The plate base 8 is provided with a shaft portion 8a and a roller 8b, respectively. The shaft portion 8a is rotatably engaged with one side plate 5 and a vertical portion 98 inside the bracket 6, and The roller 8b is a guide hole 5a of the side plate 5.
And is engaged with the cam hole 7a of the slide plate 7.
Further, another long hole 7c and an L-shaped slit 7d are formed on the upper surface of the slide plate 7, and a pin 12 that penetrates the long hole 7c is erected on the upper surface of the side plate 5. , The first eject arm 13 and the second
The eject arm 14 is pivotally supported. Between the eject arms 13 and 14, a protrusion (not shown) and the tension spring 1 are provided.
5 is kept at a constant angle by the pin 5, and the pin 14a hanging from the second eject arm 14 has the slit 7d.
Is engaged with. On the other hand, the first eject arm 13 is provided with a cam hole 13a and a long hole 13b, and a part of the detection lever 16 is engaged with the cam hole 13a. The detection lever 16 is rotatably supported on the upper surface of the side plate 5, and the detection lever 16 faces a cassette insertion detection switch 18 mounted on a circuit board 17. Various circuit elements other than the cassette insertion detection switch 18 are mounted on the circuit board 17, and the circuit board 17 is erected at the rear end of the chassis 1 and the cassette transfer mechanism 4 by using screws or caulking. It is fixed in the state. At that time, both overhanging portions 98 of the bracket 6
Since a and 99a are crimped in a state of protruding from the upper end of the circuit board 17, the frequency of external impacts being received by these overhanging portions 98a and 99a and directly acting on the circuit board 17 is reduced, and during assembly work. The cracking of the circuit board 17 caused by the above is reduced. A protrusion 19a of a slider 19 is inserted in the elongated hole 13b of the first eject arm 13 so that the slider 19 can move forward and backward along a guide groove 8c formed on the upper surface of the plate base 8. Has become.

As shown in FIG. 9, on the surface of the chassis 1, a pair of capstan shafts 20 and 21 are provided with bearings 22 and 2.
A pair of pinch levers 24 and 25 are rotatably attached by means of spindles 3 and 27. Pinch rollers 30 and 31 are rotatably supported by the pinch levers 24 and 25 via rotary shafts 28 and 29, and the pinch rollers 30 and 31 correspond to each other by the rotation of the pinch levers 24 and 25. It is adapted to come into contact with and separate from the capstan shafts 20 and 21. Also,
A head base 32 is reciprocally mounted on the chassis 1, and the head base 32 is guided so as to be movable only in the vertical direction of FIG. A magnetic head 33 is fixed on the head base 32, and the magnetic head 33 and the circuit board 17 are electrically connected via a flexible printed board 103. As is apparent from FIG. 1, the flexible printed circuit board 103 is arranged along the notch 101 formed in the horizontal portion 100 of the bracket 6, and the flexible printed circuit board 103 can be used when the cassette transfer mechanism 4 is assembled or disassembled. The board 103 does not hinder the vertical movement of the bracket 6. Further, a pin 34 is erected on the head base 32, and a wire spring 35 locked to the pin 34 causes the pinch rollers 30 and 31 to move in a direction of being pressed against the capstan shafts 20 and 21. It is energized.

The head base 32 is formed in the shape of a rectangular frame, and a pair of reel stands 36, 37 and a select lever 38 are arranged in the window hole. This select lever 38
Is rotatably supported by a boss portion 1a protruding from the chassis 1, and a select arm 39 is pin-connected to the upper end of the select lever 38. This select arm 3
9 is arranged between the chassis 1 and the head base 32, and is rotatably supported by the chassis 1 by a support shaft 40, and the projecting pin 41 hung vertically on the select arm 39 projects to the rear surface side of the chassis 1. There is. Therefore, when the select arm 39 rotates about the support shaft 40, the select lever 38 moves the select arm 39 around the boss 1a.
It is designed to rotate in the opposite direction. A pair of idler levers 42, 43 is arranged between the chassis 1 and the select lever 38, and these idler levers 42, 43 are rotatably supported on the outer peripheral surfaces of the bearings 22, 23. Cam holes 42a and 43a are formed at one end of each idler lever 42 and 43 (see FIG. 12), and rotary shafts 44 and 45 are vertically provided at the other end thereof. The reference numeral 45 projects through the through hole formed in the chassis 1 to the rear surface side of the chassis 1. further,
A discriminating lever 46 for discriminating the type of the tape cassette T is pivotally supported on the chassis 1.
A part of the protrusion of the back side of the chassis 1.

As shown in FIG. 10, the head base 3
A pair of elongated holes 32a and 32b are formed in the lower part of the head 2, and a projecting pin 32c is vertically installed in the upper part of the head base 32. The projecting pin 32c is a guide formed in the chassis 1. It penetrates through the hole 1b and projects to the rear surface side of the chassis 1. As shown in FIG. 11, the select lever 38 has a pair of through holes 38a and 38b and a pair of cam holes 3 therein.
8c, 38d and one round hole 38e are bored. The round hole 38e is rotatably inserted into the boss portion 1a of the chassis 1, and the bearings 22, 22 are inserted into the through holes 38a, 38b. 23 are provided. Further, the lower ends of the rotating shafts 28 and 29 have elongated holes 32a of the head base 32,
32b and cam holes 38c and 38d of the select lever 38 and cam holes 42a and 43a of the idler levers 42 and 43.
To the rear surface side of the chassis 1 and is urged by the wire spring 35 toward the upper edges of the elongated holes 32a and 32b.

As shown in FIG. 12, the main motor 2
The rotary shaft of the above protrudes to the rear surface side of the chassis 1, and a pulley 47 is attached to the tip thereof. Also, chassis 1
On the back of the other pulley 48 and a pair of flywheel 4
9, 50 are rotatably mounted, and a belt 51 is stretched around the outer circumferences of the flywheels 49, 50 and the pulleys 47, 48. The capstan shafts 20 and 21 are fixed to the centers of the flywheels 49 and 50, and the flywheels 49 and 50 have small gears 49a and 50a and large gears 49b and 50b centered on the capstan shafts 20 and 21, respectively. And are inscribed concentrically. In addition, a pair of support pieces 1 is provided on the back surface of the chassis 1.
c and 1d are formed by bending, and each support piece 1c and 1d
The reel bases 36, 3 are attached to the support shafts 52, 53 erected on d.
7 is rotatably supported.

As shown in FIG. 13, one reel stand 36
Is a transmission member 91 rotatably supported by the support shaft 52,
A reel gear 56 rotatably supported below the transmission member 91 via a bearing 92, a spring receiver 93 press-fitted and fixed to the central portion of the transmission member 91, and an engagement splined to the upper portion of the transmission member 91. Member 54, and one reel of the tape cassette T is engaged with this engaging member 54. The transmission member 91 has a disk-shaped collar portion 91a at the lower end, and a rotation detecting plate 58 is attached to the lower surface of this collar portion 91a.
The reflective portions and the non-reflective portions are alternately formed along the circumferential direction. A first spring 94 is interposed between the spring receiver 93 and the engagement member 54. The engagement member 54 is biased upward by the first spring 94, and the support shaft 52 is urged by the washer 95. Is prevented from falling off.
A second spring 96 is provided between the spring receiver 93 and the bearing 92, and a slip member 97 made of felt or the like is interposed between the reel gear 56 and the flange 91a of the transmission member 91. Is installed and the second spring 96
Due to the downward elastic urging force of the reel gear 56, the reel gear 56 is pressed against the flange portion 91a of the transmission member 91 via the slip member 97. Although the detailed configuration is omitted in the drawings, the other reel base 37 is also configured in exactly the same manner as the reel base 36, and the reel base 37 engages with the other reel of the tape cassette T. A compound member 55 (see FIG. 9)
The reel gear 57 and the rotation detection plate 59 are provided.

A pair of idler gears 60 and 61 are arranged on the rear surface side of the chassis 1, and these idler gears 60 and 61 are attached to the rotary shafts 44 and 45 of the idler levers 42 and 43, respectively, and the flywheel. 49,5
It is covered with 0. The idler gears 60 and 61 are always meshed with the small gears 49a and 50a of the flywheels 49 and 50, but they can be brought into and out of contact with the reel gears 56 and 57 to rotate the idler levers 42 and 43. Along with this, the reel gears 56 and 57 are brought into meshing or non-meshing state. Further, on the back surface of the chassis 1, the position detection lever 62
A lock lever 63 and a select swing 64 are provided, and a mode selection lever 65 is provided so as to cover all or part of these members. The position detection lever 62 is rotatably supported on the chassis 1 by a support shaft 62c. The position detecting lever 62 is provided with a projecting pin 62a and a through hole 62b, and the projecting pin 32c of the head base 32 is inserted into the guide hole 1b of the chassis 1 and the through hole 62b. It engages with a later-described cam hole of the selection lever 65. The lock lever 63 is provided with a protruding pin 63a and a restricting portion 63b, and the lock lever 63 is rotatably supported by a pin 66 planted in the chassis 1. The select swing 64 is rotatably attached to a support shaft 67 of the chassis 1. A projecting pin 64a is provided at the upper end of the select swing 64, and a swing gear 68 is rotatably attached at the lower end. There is. This swing gear 6
8 is located between the both reel gears 56 and 57, and as the select swing 64 rotates, the gear wheel 49b of one reel gear 56 and the flywheel 49 or the gear wheel of the other reel gear 57 and the flywheel 50. Selectively meshes with 50b.

As shown in FIG. 14, the mode selection lever 65 has a pair of guide holes 6 extending in the longitudinal direction.
9 and 70 are provided, and these guide holes 69 and 70 are provided.
Is inserted into the pin 66 and the other pin 71, the mode selection lever 65 is attached to the chassis 1 so as to be capable of reciprocating in the left-right direction in FIG. The mode selection lever 65 is also operated by using the sub motor 3 as a drive source, and a second rack 65a is formed on a part of an upper edge of the mode selection lever 65, and a pressing piece 65b is formed by bending on one side edge. And a plurality of cam holes 65 in the flat plate portion.
c to 65 g are drilled. Each of these cam holes 65c
Of the 65g, the position detection lever 6 is provided in the cam hole 65c.
2, the projection pin 63a of the lock lever 63 in the cam hole 65d, the projection pin 32c of the head base 32 in the cam hole 65e, and the projection pin 64a of the select swing 64 in the cam hole 65f. However, the projecting pins 41 of the select arm 39 are inserted into the cam holes 65g, and when the mode selection lever 65 reciprocates according to various operation modes, the respective cam holes 65c to 6c.
The relative position of 5g and the corresponding projecting pin changes.

A support plate 72 is fixed to the rear surface side of the chassis 1, and as shown in FIG.
A planetary gear mechanism 73 is arranged on the shaft, and a support shaft 74 and a printed circuit board 75 are fixed. The printed circuit board 7
A pair of optical sensors 76 and 77, each of which is composed of a photo interrupter in which a light emitting element and a light receiving element are integrated, are mounted on the optical sensor 5.
It faces 8 and 59 at a predetermined interval (see FIG. 13). Therefore, when the rotation detection plates 58 and 59 rotate, pulse signals are output from the photosensors 76 and 77 facing the rotation detection plates 58 and 59, respectively, and the reel gear 5 is output based on the pulse signals.
The rotation states of 6, 57 are detected. Further, on the printed board 75, a cassette type determination switch 78 operated by the determination lever 46, a reference position detection switch 79 operated by the pressing piece 65b of the mode selection lever 65, and the position detection lever 62. A mode detection switch 80 operated by each is mounted.

As shown in FIGS. 16 and 17, the planetary gear mechanism 73 includes a sun gear 82 pivotally supported by a pin 81 rising from a support plate 72, a carrier 83 pivotally supported by the pin 81, A ring gear 84 rotatably fitted on the carrier 83, and 3 supported by the carrier 83.
Each planet gear 85 has an inner tooth portion 82a of the sun gear 82 and a ring gear 8a.
The four inner tooth portions 84a are in mesh with each other. Further, the sun gear 82 and the ring gear 84 are respectively provided with external tooth portions 82b and 8b.
4b is engraved, and a gear 86 is press fitted into the upper end of the carrier 83. External tooth portion 8 of the sun gear 82
2b meshes with a tooth portion 87a formed at the lower end of the tubular body 87, and the tubular body 87 is rotatably supported by the support shaft 74. The tubular body 87 projects toward the front surface of the chassis 1 and has a tooth portion 87b formed on the upper end thereof.
Engages with a worm gear 88 attached to the rotating shaft of the sub motor 3. The sub motor 3 is screwed to the surface of the chassis 1 via a bracket 89, and the upper end of the support shaft 74 is supported by the bracket 89. On the other hand, the outer tooth portion 84 b of the ring gear 84 meshes with the second rack 65 a of the mode selection lever 65, and the gear 86 fixed to the carrier 83.
Is inserted through the opening 90 formed in the chassis 1, and the first rack 10 of the block body 10 is provided on the front surface side of the chassis 1.
It meshes with a. As shown in FIG. 18, this opening 90
A bent portion 1e for supporting the upper end of the pin 81 is formed on the peripheral edge of the engaging projection 10b formed on the block body 10 through the opening 90 and projected to the rear surface side of the chassis 1. There is. In addition, the first rack 1 of the block body 10
0a and the second rack 65a of the mode selection lever 65 extend in a direction parallel to each other via the chassis 1, and the restricting portion 63b of the lock lever 63 rotates in a direction to be exposed in the opening 90.

The sun gear 82 of the planetary gear mechanism 73
Composes an input shaft, and the carrier 83 and the ring gear 84 respectively compose an output shaft. The rotational force input from the sub motor 3 to the sun gear 82 is transferred to the two output shafts (the carrier 83 by the lock lever 63).
And the ring gear 84). That is, as shown in FIG. 19A, the protruding pin 63 a of the lock lever 63 is connected to the cam hole 6
When engaged with the step portion of 5d, the mode selection lever 65
Is prevented by the lock lever 63, and the lock lever 63 is in the first lock position. In addition, the regulation unit 63
The end face of b is the second rack 65a of the mode selection lever 65.
Since the engaging protrusion 10b of the block body 10 is in contact with the end surface of the restricting portion 63b, the restricting portion 63b does not rotate into the opening 90, and the lock lever 63 does not rotate. Is maintained in the first locked position by the engagement projection 10b. When the sub motor 3 starts rotating in one direction in this state, this rotation is transmitted from the worm gear 88 to the sun gear 82 of the planetary gear mechanism 73 via the tubular body 87, and the sun gear 82 rotates. At this time, the ring gear 8
The outer gear portion 84b of No. 4 meshes with the second rack 65a of the mode selection lever 65, and the ring gear 84 is locked by the mode selection lever 65 so as not to rotate. Revolving around 81, the rotation of the sun gear 82 is output from the carrier 83. As a result, the carrier 83 and the gear 86 are shown in FIG.
9 (a) rotates in the arrow A direction, the first rack 10a meshing with the gear 86 moves in the arrow B direction, and the slide plate 7 provided with the block body 10 also moves in the same direction.

In this way, when the block body 10 moves in the direction of the arrow B, the engagement protrusion 10b moves within the opening 90 and the regulating portion 63.
The lock lever 63 moves along the end surface of the lock lever 63 and is maintained in the first lock position by the engagement protrusion 10b during the movement, so that the lock lever 63 rotates and the mode selection lever 65 moves.
Is prevented from moving. Then, the engaging protrusion 10b is opened 9
When it reaches the end position of 0, the block body 10 cannot move any more, and the engaging projection 10b moves to the regulating portion 63.
Since it exceeds b, the lock lever 63 can freely rotate. In this state, when the sub motor 3 continues to rotate in one direction, the carrier 8 that meshes with the first rack 10a.
Since No. 3 cannot rotate any more, each planet gear 85 rotates about this time, and the rotation of the sun gear 82 is output from the ring gear 84 and transmitted to the second rack 65a of the mode selection lever 65. As a result, FIG.
As shown in (b), the ring gear 84 starts to rotate in the direction of arrow C, and the force in the direction of arrow D acts on the mode selection lever 65, so that the protruding pin 63a of the lock lever 63 moves in the step portion of the cam hole 65d. However, the lock lever 63 has a pin 6
6 is rotated in the clockwise direction in the figure to move to the second lock position. As a result, the mode selection lever 65
Starts to move in the direction of arrow D, and the restricting portion 63b projects into the opening 90 and locks with the engaging projection 10b, whereby the movement of the block body 10 is blocked by the lock lever 63.

In this way, the mode selection lever 65 is moved to the arrow D.
Projecting pin 63a of the lock lever 63 when moving in the direction
Moves in the long hole portion of the cam hole 65d, and the lock lever 63 is maintained at the second lock position by the cam hole 65d during that time. Therefore, the rotation of the lock lever 63 and the block 1
The movement of 0 is blocked. When the sub motor 3 is rotated in the other direction, the lock lever 63 switches from the second lock position to the first lock position, and the operation reverse to the above is performed.

Next, the operation of the cassette tape player constructed as described above will be described. First, when the tape cassette T is inserted into the cassette holder 9 from the eject completed state shown in FIGS. 1 to 5, the slider 19 is caught in the reel hole of the tape cassette T and pushed in, so that the first eject lever 13 causes the tension spring 15 to move. It rotates in the counterclockwise direction in FIG. 1 against the spring force of. Then, the protrusion of the detection lever 16 moves in the cam hole 13a, so that the detection lever 16 rotates clockwise in FIG. 1 and the cassette insertion detection switch 18 is turned on.

When the cassette insertion detecting switch 18 is turned on, the sub motor 3 starts rotating in one direction (hereinafter, this is referred to as forward direction and the other direction is referred to as reverse direction), and the cassette transfer mechanism 4 is started. Perform auto loading operation. In this case, since the lock lever 63 is in the first lock position shown in FIG. 19A and the movement of the mode selection lever 65 is blocked by the lock lever 63, the sub motor 3
The rotation in the forward direction is input to the sun gear 82 of the planetary gear mechanism 73 and output from the carrier 83, and the first rack 10a meshing with the gear 86 of the carrier 83 moves. As a result, the block body 10 and the slide plate 7 move to the left in FIG. 1 (right in FIG. 3), and the second eject arm 1 moves.
When the pin 14a of No. 4 moves in the slit 7d, both eject arms 13 and 14 rotate counterclockwise around the pin 12, so that the slider 19 of the plate base 8 moves along the guide groove 8c. When the tape cassette T slides inward, the tape cassette T is automatically pulled into the cassette holder 9 as shown in FIG. Further, since the roller 8b moves in the cam hole 7a from the upper position to the lower position by the movement of the slide plate 7, the plate base 8 is fixed to the shaft portion 8a.
Then, the cassette holder 9 is lowered to the lower position as shown in FIG. 8, and the mounting of the tape cassette T is completed.

When the mounting of the tape cassette T is completed in this way, the engaging projection 10b of the block body 10 is moved to the chassis 1
By contacting the end of the opening 90 of the slide plate 7
Of the planetary gear mechanism 73 is switched from the carrier 83 to the ring gear 84, and the rotation of the sub motor 3 is output from the ring gear 84 to the second rack 65a of the mode selection lever 65. Transmitted.
That is, at the mounting completion position of the tape cassette T, the lock lever 63 is switched from the first lock position shown in FIG. 19A to the second lock position shown in FIG. After the sub motor 3 rotates in the forward direction to move to the pause position, the sub motor 3 rotates in both the forward and reverse directions to move to various operation mode positions, and the rotation of the main motor 2 causes normal play operation, reverse play operation, auto reverse operation, REW operation, FF
The operation is performed. When the eject mode is selected after the end of these various operation modes, the sub motor 3
Rotates in the opposite direction, and the mode selection lever 65 moves to the initial position, that is, the mounting completion position of the tape cassette T after passing through the pause position.

After that, an auto eject operation, which is the reverse of the above-mentioned auto loading operation, is performed, and the tape cassette T
19A, the output shaft of the planetary gear mechanism 73 is switched from the ring gear 84 to the carrier 83 at the mounting completion position of the lock lever 63 from the second lock position shown in FIG. The block body 10 moves to the first lock position, and the sub-motor 3 rotates in the opposite direction to move the block body 10. As a result, the slide plate 7 moves in the opposite direction to that in the automatic loading to rotate the plate base 8 upward, and further both eject arms 13 and 14 rotate to slide the slider 19 to the front side of the plate base 8. Then, the tape cassette T is automatically ejected to the front of the cassette holder 9. Then, when the detection lever 16 rotates counterclockwise in FIG. 1 and the cassette insertion detection switch 18 is turned off, the rotation of the sub motor 3 is stopped and the eject operation of the tape cassette T is completed.

In the above embodiment, the bracket 6 (one of the side plates supporting the cassette holder 9), which is a component of the cassette transfer mechanism 4, is provided with a pair of vertical portions 9 parallel to each other.
Horizontal part 1 bridging these vertical parts 98,99 with 8,99
Since it has a concave cross-section integrally formed with 00, the rigidity of the bracket 6 is enhanced and deformation can be prevented.
Further, since the notch 101 reaching the rear end is formed in the horizontal portion 100 of the bracket 6 and the flexible printed circuit board 103 connecting the magnetic head 33 and the circuit board 17 is faced to this notch 101, assembly work and repair work are performed. At a time, etc., with both ends of the flexible printed circuit board 103 still connected to the magnetic head 33 and the circuit board 17,
The bracket 6 can be attached to or removed from the chassis 1, and workability can be improved. Moreover, since the outer vertical portion 99 extends substantially parallel to the flexible printed circuit board 103, it is possible to prevent external noise from jumping into the flexible printed circuit board 103.

Further, both vertical portions 98, 99 of the bracket 6
Overhanging portions 98a, 99a are formed on the
Since 8a and 99a are locked to the circuit board 17 so as to project from the upper end of the circuit board 17, it is possible to prevent the circuit board 17 from being cracked by an external impact during the handling work. Further, the leg portion 99b is attached to the outer vertical portion 99.
Since the leg pieces 99b are hooked to the chassis 1, the fixing strength of the bracket 6 to the chassis 1 is enhanced, and also from this point, the deformation of the cassette transfer mechanism 4 can be prevented. Moreover, the leg pieces 99b are attached to the pinch rollers 30, 3
Since 1 is located outside the wire spring 35 that is in pressure contact with the capstan shafts 20 and 21, it is possible to prevent an operator from scratching the wire spring 35 and removing the gloves during the handling work.

[0030]

As described above, according to the present invention,
Among the pair of side plates that swingably supports the cassette holder, the side plate arranged above the magnetic head is provided with a pair of vertical portions and a horizontal portion bridging these vertical portions, thus increasing the rigidity of the side plates. The tape cassette transfer mechanism can be firmly attached to the chassis, and since the notch reaching the rear end is formed in the horizontal portion of the side plate, both ends of the flexible printed circuit board remain connected to the magnetic head and the circuit board. In this state, the side plate can be attached to or removed from the chassis, and workability at the time of assembly or repair can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of an eject completed state of a cassette tape player according to an embodiment of the present invention.

FIG. 2 is a left side view thereof.

FIG. 3 is a right side view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a rear view thereof.

6 is a perspective view of a bracket provided in the cassette tape player of FIG. 1. FIG.

FIG. 7 is a front view showing a completed state of mounting the tape cassette of the cassette tape player of FIG.

FIG. 8 is a right side view thereof.

FIG. 9 is a plan view showing the cassette tape player of FIG. 1 with a cassette transfer mechanism omitted.

FIG. 10 is a plan view of a head base provided in the cassette tape player.

FIG. 11 is a plan view of a select lever included in the cassette tape player.

FIG. 12 is a bottom view of the chassis provided in the cassette tape player as viewed from the back surface side.

FIG. 13 is a cross-sectional view of a reel stand provided in the cassette tape player.

FIG. 14 is a bottom view of a mode selection lever provided in the cassette tape player.

FIG. 15 is a plan view seen from the front surface side of a support plate provided in the cassette tape player.

FIG. 16 is a sectional view showing a power transmission mechanism of a sub motor provided in the cassette tape player.

FIG. 17 is an explanatory diagram of a planetary gear mechanism included in the power transmission mechanism.

FIG. 18 is an exploded perspective view showing a main part of the power transmission mechanism.

FIG. 19 is an explanatory diagram showing a power switching operation of the power transmission mechanism, wherein (a) is an explanatory diagram of an eject completed state;
(B) is an explanatory view of a tape cassette mounting completed state.

[Explanation of symbols]

1 chassis 4 Cassette transfer mechanism 5 side plates 6 Bracket (side plate) 7 Slide plate 8 plate base 9 cassette holder 17 circuit board 32 head base 33 magnetic head 35 wire spring 98,99 Vertical part 98a, 99a Overhanging part 99b leg piece 100 horizontal section 101 Notch 102 screws 103 Flexible printed circuit board T tape cassette

Claims (3)

(57) [Claims] 1. A head base, to which a magnetic head is fixed, is mounted on a chassis, a pair of side plates are opposed to each other with a predetermined gap, and a cassette holder for holding a tape cassette is rocked between these side plates. In a cassette tape player in which a circuit board, which is arranged so as to be possible, and the magnetic head, which is arranged in the inner part of the side plate, are connected via a flexible printed circuit board, a pair of vertical parts and one of these vertical parts are provided on one of the both side plates. And a horizontal portion that bridges the horizontal portion, and a notch through which the flexible printed circuit board can be inserted is formed from the middle to the rear end of the horizontal portion. 2. The method according to claim 1, wherein a protruding portion that protrudes above the circuit board is formed at a rear end of the vertical portion, and the protruding portion is locked to an upper end of the circuit board. A cassette tape player. 3. The leg piece projecting below the horizontal portion is formed on the vertical portion located outside the flexible printed circuit board according to claim 1 or 2, and a lower end of the leg piece is formed on the chassis. A cassette tape player characterized by being locked to.