JPS6316037Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk device, and an object of the present invention is to provide a device that can easily load and unload (eject) a floppy disk cartridge to a predetermined position.

Generally, floppy disks, which are a type of magnetic disk for storing information, have recently begun to be used in word processors and the like. There are currently two types of floppy disks, one with an outer diameter of 8 inches and one with an outer diameter of 5 inches.The floppy disk is wrapped in a paper cover with a window hole and inserted into the mounting device, and the head of the mounting device inserts the disk through the window hole. is used to record or reproduce information on a floppy disk.

However, a floppy disk with an outer diameter of 3 inches has recently been developed, but because the outer diameter is smaller than conventional disks, it is stored in a cartridge for convenience in handling. Therefore, the cartridge itself is attached to a mounting device to record or reproduce the above information.
This device will be explained below.

FIG. 1 is an overall perspective view of an embodiment of a floppy disk device according to the present invention, and FIGS. 2 and 3 are exploded perspective views of the frame and surroundings of the device and the loading mechanism, respectively.

In the figure, a floppy disk device 1 is a frame 2.
has. As shown in Fig. 2, the frame 2 is molded by aluminum die-casting, and has a central convex portion 2a (having a center hole 2b and three holes 2c) at the front of the upper surface, and a pair of convex portions 2d (each having a small diameter portion 3a). A sensor 4 (with a pin 3 inserted and fixed therein), a sensor 4 having a slot 2e and housing a light-receiving element (A of the cassette)
side, B side), 5 (for detecting accidental erasure prevention state), and 6 (for detecting disk track recording or playback start position), and screw hole 2 on the side.
f, 2g, and a support plate part 2h (each having a pair of recesses 2i and a screw hole 2j), and a motor storage hole 2k (having a pair of positioning protrusions 2l inside) at the rear, and screw holes 2m on both sides thereof. , a rectangular convex portion 2n (having a recess 2p and a screw hole 2g, and an L-shaped support portion 2r and a screw hole 2r-1 on the right side), three L-shaped support portions 2s, 2t, 2u (each having a screw hole 2s) -1,
2t-1, 2u-1). The supporting parts 2r and 2s are such that the inner sides of each L-shape overlap accurately in the front-rear direction (directions of arrows A and B), and the supporting parts 2t,
2u is also superimposed in the same way. Further, a steel plate 7 is screwed into the lower surface recess 2v of the frame 2, and a portion of the steel plate 7 peeks out from the slot 2e. Also sensor 4,
Reference numerals 5 and 6 face three sensors (each containing a light emitting element) arranged on a substrate (not shown) fixed above the frame, and appropriately receive light from these sensors.

Reference numeral 8 denotes a loading mechanism, which includes side plates 9-1 and 9-2, a push cam plate 10 (a pair of cam plates 11, and a connecting rod 13 having an eject button 12), as shown in FIG.
), a cartridge holder plate 14 (having a door holder 15),
It consists of an eject plate 21. The side plate 9-1 includes a pair of mounting holes 9a, an engagement hole 9b, a vertical cam hole 9c, a stopper hole 9d, and a spring storage hole 9e (spring hanging convex portion 9).
f), an engaging convex portion 9g, and a long hole 9h,
An inner cam lever 22 (having an upper end pressed portion 22a and a lower end cam pin 22b protruding left and right as a second cam portion) is pivotally supported by a pin 23, and a pair of guide pins 24 and 25 are fixedly provided. The side plate 9-2 has a symmetrical shape with the side plate 9-1, and both side plates 9
-1 and 9-2 are screwed to both front sides of the frame 2 by screws 36 through the respective mounting holes 9a and screw holes 2g.

The cam plate 11 of the push cam plate 10 has a doglegged cam hole 11a (horizontal cam part 1) as a third cam part.
1a-1, an inclined cam portion 11a-2), a square cam hole 11b as a fourth cam portion, and a doglegged cam portion 11c as a third cam portion (horizontal cam portion 11c-1, an inclined cam portion). 11c-2), and has straight guide portions 11d and 11e. The push cam plate 10 is arranged between the side plates 9-1 and 9-2, and the straight guide portions 11d and 11 of both the cam plates 11
e are placed as guides on the guide pins 24 and 25, respectively, and the guide pin 22b of the cam lever 22 is fitted into the square cam hole 11b.

The cartridge holder plate 14 has a central hole 14a,
A guide groove 14b (having a stepped portion 14b-1), both side holes 14c, a rear side plate portion 14d, a clamp lever plate 26 fixed thereto, a pair of engagement projecting plate portions 14e at the front end, spring hook convex portions 14f on both sides, 14g, a guide convex portion 14h, a guide plate portion 14i, and cam pins 27 and 28 as first cam portions provided on each lower cut and raised plate portion. The clamp lever plate 26 includes a guide plate 29, a pair of lower spring plates 30, and a pin 31.
It has a resin tapered clamper 33 supported via a coil spring 32.

The door holder 15 is made of resin, as shown in FIG.
The window hole 15a has a stepped portion 15b on the rear periphery, a pair of engaging rod portions 15c (each having an engaging groove 15d), and a pair of convex portions 15e, and a metal plate is attached to the pin 34 inserted through each convex portion 15e. A manufactured door 35 and a torsion spring 41 are fitted together, and the door 35 is biased by the torsion spring 41 to abut against the stepped portion 15b and close the window hole 15a. As shown in FIG. 3, the door holder 15 is integrally attached to the cartridge holder plate 14 by elastically fitting the engagement grooves 15d of each engagement rod 15c into each engagement protrusion 14e. .

The ejection plate 21 has a U-shape, and as shown in FIG. 3, has a pair of guide convex portions 21b of a rear side plate portion 21a, upper and lower guide convex portions 21c and 21d on both sides, and an outer cam plate portion 21e. The eject plate 21 is interposed between the upper surface of the cartridge holder plate 14 and the clamp lever plate 26, and includes two sets of upper and lower guide protrusions 2.
1c and 21d are guided and fitted to each other while sandwiching the guide plate portion 14i, and the guide convex portion 21b is inserted into the guide groove 1.
4b and can be slid freely in the directions of arrows A and B, and usually each lower guide protrusion 21d
and spring hook convex portion 1 of cartridge holder plate 14
The guide convex portion 21b is urged in the direction of arrow A by a pair of coil springs 42 stretched between 4f, and is stopped when it comes into contact with the step portion 14b-1.

This cartridge holder plate 14 (door holder 1
5. The eject plate 21 (with the eject plate 21 already assembled) is disposed between both cam plates 11 of the push cam plate 10, and the cam pins 27 on both sides are connected to the horizontal cam portion 11a-1 of the cam hole 11a of the cam plate 11, the side plate 9-1, The other cam pins 28 on both sides are placed in contact with the horizontal cam portion 11c-1 of the cam portion 11c, and the spring hook convex portions 14g on both sides and the side plate 9-1 are sequentially inserted into the vertical cam holes 9-2. , 9-2 are biased downward by a pair of coil springs 43 stretched between the spring hook protrusions 9f.

44 is a resin front plate with window holes 44a, 44b,
It has a pair of engagement arms 44c (each having a claw portion 44d), a pair of projecting plate portions 44e (each having a hole 44f), and a pair of engagement recesses 44g. Front plate 4
4 fits the projecting plate parts 44e into the recesses 2i on the front surface of the frame 2, and inserts the claw parts 44d of the engagement arms 44c into the engagement holes 9b of the side plates 9-1 and 9-2, respectively.
and engage the engaging recesses 44g with the respective side plates 9-
1 and 9-2 and are temporarily fixed by engaging with the engagement convex portions 9g, and then screwed with the screws 45 through the holes 44f and screw holes 2j.

In the loading mechanism 8, the push cam plate 10 includes guide portions 11d and 11 of both cam plates 11.
e is the guide pin 24, 25 of the side plate 9-1, 9-2
Moreover, the square cam hole 11b is guided and regulated by the cam pin 22b of the cam lever 22, and the head of the screw 16 is guided by the elongated hole 9h, so that it is slidable only in the front and rear directions (directions of arrows A and B). , and cartridge holder plate 14
Since the cam pin 27 is guided and restricted by the vertical cam holes 9c of the side plates 9-1 and 9-2, it is slidable only in the vertical direction (directions of arrows C and D).
However, under normal conditions, as shown in FIG. 1, the push cam plate 10 is in the so-called eject position where it is pushed and slid to the rearward limit (in the direction of arrow B), so that the cartridge holder plate 14 is moved so that the cam pins 27 are pushed against the side plates 9-1 and 9. -2 vertical cam hole 9c and cam plate 11
It is in the eject position where it is commonly guided and regulated by the horizontal cam portion 11a-1 of the cam hole 11a and slid to the upper limit (in the direction of arrow C) against the coil spring 43. Further, the cam pins 22b of the cam levers 22 are each pushed rearward by the front edge of the square cam hole 11b of the cam plate 11, and the outwardly protruding portion of the cam pin 22b is at its rotation limit in the direction of arrow H, where it comes into contact with the rear edge of the stopper hole 9d.

According to this loading mechanism 8, in FIG. 1, the side plates 9-1, 9-2, the cam lever 22,
Cam plate 11, cam pins 27, 28 of cartridge holder plate 14, cam plate portion 21e of eject plate 21
The interlocking mechanism parts are relatively small, excluding the floppy disk cartridge 108 (the width of which is l, where l<L), which is inserted as described later, out of the entire width (L) of the loading mechanism 8. It is accommodated in both sides of the width (width dimension (L-l)/2, respectively), and the interlocking mechanism portion of the loading mechanism 8 is miniaturized, and the entire device 1 is also miniaturized.

Reference numeral 45 denotes a carriage formed by aluminum die-casting, and as shown in FIG. It has a light shielding projecting plate part 45f, and the front end projecting part 45
A lead wire 47 of the magnetic head 46 housed in the magnetic head 46 is led out from the hole 45h through a lower recess (not shown). The magnetic head 46 is composed of a recording/reproducing head and an erasing head arranged side by side.

Reference numeral 48 denotes a resin pad support arm, which includes an arm body portion 48a bent into a dogleg shape, and a guide pin portion 48.
b. It has a pad 49 implanted on the lower surface of its tip, and a pair of projecting plate parts 48c, each projecting plate part 48c is fitted on the outside of each projecting plate part 45c with respect to the carriage 45, and is pivotally supported by a pin 50, and also has a torsion spring. 51 urges the pad 49 in the downward direction, and the pad 49 lightly presses the floppy disk 110 against the head 46, as will be described later. The structure of the head 46 and the arm 48 is not limited to the above structure, and conversely, a pad may be provided on the carriage 45 and a head may be provided on the arm 48.

52 and 53 are long and short guide bars, respectively.
The guide bar 52 is connected to the support portions 2r and 2s of the frame 2.
As shown in FIG. 4, screw holes 2r-1,
2s-1 is pressed by the tapered part 56a of the countersunk screw 56 screwed into each support part 2f, 2s.
It is pressed in common against the horizontal and vertical surfaces of the corners of the character, and is positioned and fixed so as to accurately match the directions of arrows A and B. The guide bar 53 is similarly installed between the support portions 2t and 2u, and is fixed by countersunk screws 56 in alignment with the directions of arrows A and B. The carriage 45 is mounted so that the pair of guide holes 45a are fitted into the guide bars 52, and the guide recesses 45b are fitted into the guide bars 53, so that the carriage 45 can be accurately slid in the directions of arrows A and B. At this time, the protrusion 45
g is guided in sliding contact with the steel plate 7 in the slot 2e,
In addition, the pad support arm 48 has a guide pin portion 48b.
The clamp arm 26 comes into contact with the guide plate 29 of the clamp arm 26 and is stopped at a position separated from the head 46.

54 is a stepping motor, and as shown in FIG. 2, a U-shaped metal plate frame 55 (having an L-shaped elongated hole 55c extending between a side vertical plate portion 55a and a horizontal plate portion 55b) is fitted on the front surface. A belt presser 64 is screwed to the ring 62 press-fitted to the output shaft 61 via a thin spring plate-shaped guide belt 63 with a screw 65 . Guide belt 63
As shown in the circle in Figure 2, the left head 63a
(having a hole 63b), a strip part 63c, a right slit 63d (with a central hole 63e and a hole 63f on both sides)
After the screw 65 is inserted into the center hole 63e and fixed to the output shaft 61, the ring 62 is wound in a crosswise manner around the outer periphery of the ring 62, and the head 63a and strip portion 63c are inserted into the slit 63d. It is inserted. The stepping motor 54 is housed in the storage hole 2k of the frame 2, and is positioned such that the front surface of the frame 55 is in contact with the inner surface of the pair of protrusions 2l, and each horizontal plate portion 55b is in contact with the upper surface of the frame 2, Long hole 5
5c, and is fixed by a screw 66 through a screw hole 2m. Thereafter, the guide belt 63 is attached to the carriage 45 so that both ends of the above-mentioned intersecting winding are indicated by the arrows A and 45, respectively.
It is brought into contact with the front and rear step portions 45d in a state where it is pulled in the B direction and given tension, and is fixed by screws 67 through the holes 63b, the front screw holes 45e, the holes 63f, and the rear screw holes 45e, respectively. As a result, when the output shaft 61 rotates stepwise in the direction of arrow E or F, the strip portion 63c moves relatively within the slit 63d, and the carriage 45 reciprocates in the direction of arrows A and B in a stepwise manner. In addition, the inner surfaces of the pair of protrusions 2l are machined so as to accurately match the directions of arrows A and B, and the front surface of the frame 55 is also aligned with the output shaft 61.
Since the axis of the output shaft 61 is centered to be exactly perpendicular to the axis of the output shaft 61, the axis of the output shaft 61 is precisely perpendicular to the sliding direction of the carriage 45 when the motor 54 is assembled, thereby improving operational accuracy. Also, the starting position of the carriage 45 can be set using the long hole 55c for mounting the motor 54.
This can be easily done by moving and adjusting the motor 54 and carriage 45 together in the directions of arrows A and B by the allowance.

According to the mounting structure of the guide belt 63, the carriage 45, and the guide bars 52, 53, the guide belt 63 is attached to the carriage 45, the guide bars 52,
Since the carriage 45 is installed extending in a direction parallel to the guide bars 52 and 53 at an approximately intermediate position between the guide bars 52 and 53, the carriage 45 is moved in the sliding direction approximately at an approximately intermediate position between the guide bars 52 and 53 on both sides of the guide bars 52 and 53. Since the matching sliding force is applied, it is possible to slide smoothly without receiving any torsional force in the horizontal plane and causing play. Furthermore, since the drive point of the guide belt 63 (the intersection of the belts 63) is approximately aligned with the axis height of the guide bars 52 and 53 when viewed in the height direction, the carriage 45 is not subjected to rotational force in the vertical plane and is free from play. It is possible to slide more smoothly without causing any problems.

68 is a switch unit that detects the start position (rear slide limit) of the carriage 45, and the resin switch case 69 is connected to its pair of sensors 70,
71 (accommodating a light emitting element and a light receiving element, respectively) are inserted into a pair of square holes 72a of a metal support plate 72 and fixed by stacked screws 73. In the switch unit 68, the projecting plate part 72b of the support plate 72 is fitted into the concave part 2p of the convex part 2n of the frame 2, and is fixed by the screw 74 through the notch part 72c and the screw hole 2q. In the gap between the pair of sensors 70 and 71, the carriage 4 which has reached its sliding limit in the direction of arrow B is inserted.
The projecting plate portion 45f of No. 5 is inserted, and the sensors 70, 71
The light passing between them is blocked, the slide limit (carriage 45 start position) is detected, and the rotation of the stepping motor 54 in the direction of arrow F is stopped.

Reference numeral 81 is a board unit, as shown in Figs. 6, 7, and 9.
As shown in the figure, wiring printed on the top surface of the board 82 and circuit elements such as IC chips are arranged on the bottom surface, and the right half of the board 82 in FIG. Moreover, the left half of the board 82 is used as a circuit for driving the stepping motor 54.

As shown in Fig. 8, the motor 83 has an aluminum rotor hub 84, a shield plate 96 (three holes 96
a), a fixed ring 85, a magnetic material yoke 86, six coils 87, and three Hall elements 8.
8, the shaft 90, the disk table 91, the rotor holder 92, and the rotor 9.
3. A rotor 95 side consisting of a magnet 94 is arranged via a ball bearing 101. The rotor bub 84 of the stator 89 has a hole 84a and a flange 84b (having three screw holes 84c), and a ball bearing 101 is fitted into the hole 84a, and a yoke 86 is press-fitted into the lower surface of the flange 84b. , the lower end of the hub is fitted into the hole 82a of the board 82, and a fixing ring 85 is attached to the downward protrusion.
are fitted and caulked to be fixed, and a shield plate 96 is fitted onto the upper surface of the flange portion 84b. coil 8
As shown in FIG. 7, the wires 7 are each wound into a flat triangular loop shape, and the leads thereof are connected to wiring prints and fixed by adhesive at appropriate six equal positions in the circumferential direction on the upper surface of the substrate 82. As shown in FIGS. 7 and 8, the Hall element 88 is a substrate 8 formed at the center of the three coils 87.
2, and its leads are connected to appropriate wiring prints. Shaft 90 of rotor 95
is fitted into the ball bearing 101, a brass disk table 91 (having a pin portion 91a) is press-fitted into the upper protrusion, a rotor holder 92 is press-fitted into the lower protrusion, and a magnet 94 (with a circumference) is fitted into the rotor holder 92. The rotor 93 is fitted and secured by crimping. A square waveform print (not shown) for frequency power generation is arranged in the circumferential direction at a position facing the magnet 94 on the lower surface of the substrate 82. According to the configuration of the motor 83, the Hall element 88 is embedded in the hole 82b of the substrate 82.
Since the thickness is within the height of the coil 87, the height of the motor and The overall height of the device 1 can be reduced.

In FIG. 9, 102, 103, and 104 are IC chips of the motor 83 drive circuit, respectively, and the chip 102
Chips 103 and 104 are for motor drive circuits, and chips 103 and 104 are for motor speed control circuits, respectively. Chip 102
Because they generate heat during use, they are designed to dissipate heat. That is, in FIG. 10, a chip 102 is integrally formed with a pair of metal support plates 102a (each having a hole 102b) in advance. Reference numeral 105 denotes an aluminum heat sink, which has a recess 105a and a pair of holes 105b.The recess 105a is placed on the upper surface of the support plate 102a so that the chip 102 is loosely fitted, and the holes 105b, 1
A nut 107 is screwed onto the screw 106 via 02b and fixed. Therefore, the heat generated from the chip 102 is transmitted to the heat radiating plate 105 and is quickly radiated from the chip 102, thereby preventing the chip 102 from being overheated.

The substrate unit 81 is stored in the underside recess 2v of the frame 2, and as shown in Figure 8, the upper part of the rotor hub 84 is inserted into the central hole 2b so that the disk table 91 and the upper end of the hub 84 protrude above the frame 2 and are fixed by three flat head screws 116 that pass through holes 2c, 96a and 84c.

The method for driving the motor 83 is as follows: First, when three Hall elements 88 are energized, a predetermined Hall element 8
8 is passed through the magnetic flux previously formed between the magnet 94 and the yoke 86, thereby generating a signal in a predetermined direction. This is sent to a drive circuit such as the IC chip 102 on the bottom surface of the board 82, and the drive circuit energizes a predetermined coil 87.
Magnetic flux is generated at magnet 7, and this magnetic flux
4, the rotor 95 rotates by a predetermined angle, and in the same manner, predetermined Hall elements 88 sequentially issue signals, predetermined coils 87 are sequentially energized, and the rotor 95 rotates continuously at a constant speed. . Furthermore, at this time, the magnetic flux of the magnet 94 crosses in the circumferential direction the square waveform print for frequency power generation on the lower surface of the substrate 82, and a waveform signal having a frequency corresponding to the rotational speed of the rotor 95 is generated in the print. The number of waveforms is the same on the board 82.
The rotation speed of the rotor 95 is counted and detected by the speed control circuit such as the IC chips 103 and 104 on the lower surface, and when the rotation speed deviates from the normal speed or when the rotation speed needs to be changed, a signal is sent from the speed control circuit. Accordingly, the energization switching timing of the coil 87 is varied and the rotational speed is controlled.

108 is a floppy disk cartridge,
As shown in Figures 1 and 3, the cartridge chassis 1
A 3-inch floppy disk 110 and a shutter 111 are housed inside the disk. Chassis 10
9 is the center hole 109a, and the long hole 1 for reading the head.
09b, track reading start position detection hole 109
c, a pair of positioning holes 109d, a pair of holes 109e for detecting the state of preventing accidental erasure, a notch 109f for detecting the cartridge surface, and grooves 109g on both sides, and a disk 11 in the center hole 109a as shown in FIG.
0 hub 110a (center hole 110b, notch hole 11
0c) is looked into. The shutter 111 is made of a metal plate, has a predetermined shape that follows the upper and lower surfaces of the disk 110, and is rotatable concentrically with the disk 110 and is biased counterclockwise by a spring means (not shown). It is stopped at the position shown in the figure, and the elongated hole 109b and hole 109c are closed by its predetermined portion. Further, 112 is a flexible belt, which is attached to the shutter 1.
11, the left end of the belt is fixed to the shutter 111, and the engagement protrusion 112a on the right end of the belt is connected to the right side groove 109g by the arrow A,
They are fitted so that they can slide freely in the B direction. Further, the pair of holes 109e can be opened and closed by manually switching and sliding a pair of shutters 113 arranged corresponding to the holes 109e, and the holes 109e are closed to block light from reaching the sensor 5 from the sensor on the upper substrate. When this happens, the erasing head of head 46 is rendered inoperable to prevent the information on disk 110 from being erroneously erased.

Next, the operation of the device 1 will be explained. The floppy disk cartridge 108 is inserted into the door holder 15 through the window hole 44a of the front plate 44 as shown in FIG.
The door 35 is inserted into the window hole 15a of the cartridge holder plate 14, and as it is further pushed in the direction of the arrow B, the door 35 is pushed open against the spring 41 and enters the upper surface of the cartridge holder plate 14. At this time, the grooves 10 on both sides of the cartridge 108
9g are guidedly fitted into both inner guide protrusions 14h of the cartridge holder plate 14, thereby preventing the cartridge 108 from floating when pushed in. First, the clamper 33 rides on the upper surface of the cartridge chassis 109 against the coil spring 32, and the cartridge 108 is fitted into the eject plate 21 and abuts against the rear side plate portion 21a of the eject plate 21.

Thereafter, the cartridge 108 and eject plate 21 are pushed together in the direction of arrow B against the coil spring 42, but at this time, the upper surface of the cartridge chassis 109 is pressed downward by the pair of spring plates 30 of the clamper lever plate 26. This further prevents the cartridge 108 from floating up. And rear side plate part 2
1a is the rear plate portion 14 of the cartridge holder plate 14;
d, both side cam plate portions 21e of the eject plate 21 press against the pressed portions 22a of the respective cam levers 22 of the side plates 9-1 and 9-2, respectively, and rotate the respective cam levers 22 in the direction of the arrow G. .

Then, the lower end cam pin 22b of each cam lever 22
presses the front edge of the square cam hole 11b of each cam plate 11 of the push cam plate 10 in the forward direction (in the direction of arrow A). Therefore, the push cam plate 10 starts to slide in the direction of the arrow A, and the cam pins 27 and 28 on both sides of the cartridge holder plate 14 relatively close to the horizontal cam portions 11a- of the cam hole 11a and the cam portion 11c, respectively.
1, 11c-1 in the backward direction.

At the time when the rear plate portion 21a abuts the rear plate portion 14d of the cartridge holder plate 14 and the cartridge 108 and eject plate 21 stop sliding in the direction of arrow B, the cam pins 27 and 28 are inserted into the cam hole 11a and the cam portion, respectively. 11c to the respective inclined cam portions 11a-2 and 11c-2 has already been completed. Therefore, each cam pin 27, 28 is moved by the coil spring 43 to the inclined cam portions 11a-2, 11c-.
2 is pressed downward to apply a sliding force in the forward direction (in the direction of arrow A) to the push cam plate 10 due to its slope effect.

Therefore, the push cam plate 10 is further slid forward by the above-mentioned force, and as a result, the cartridge holder plate 14 (eject plate 21, cartridge 108) is moved by its respective cam pins 27 and side plates 9.
It starts sliding downward (in the direction of arrow D) by the guide of the vertical cam holes 9c of -1 and 9-2. and,
When the cam pins 27 and 28 move relatively downward along the inclined cam portions 11a-2 and 11c-2 and come into contact with the lower ends thereof, the push cam plate 10 slides forward and the cartridge holder plate 14 moves downward. Each slide is stopped. As a result, the eject button 12 of the push cam plate 10 is projected forward from the window hole 44b of the front plate 44 to the position shown by the two-dot chain line in FIG.

At the same time, the pair of positioning holes 109d of the cartridge 108 are respectively fitted into the small diameter portions 3a of the pair of positioning pins 3 of the frame 2, and the center hole 110b of the floppy disk 110 is fitted with the shaft 9.
0 protrusion, the hub 110a is placed on the upper surface of the disk table 91, and the hub 110a is fitted into the notch hole 110.
c is disk 1 due to the function of the guide section around it.
By adjusting rotation of the floppy disk 10 itself, the floppy disk 110 is fitted into the pin portion 91a, and the floppy disk 110 is set to rotate concentrically and integrally with the rotor 95 of the motor 83, and loading of the cartridge 108 to a predetermined position is completed.

Note that even when the cartridge 108 is pushed to its sliding limit in the direction of arrow B during the above operation, the front end of the cartridge 108 is still in the window hole 15 of the door holder 15.
a and the window hole 44a of the front plate 44, and further protrudes slightly forward. Therefore, cartridge 1
08 is moved further downward in this state, but the height of the window hole 44a of the front plate 44 is set in advance to accommodate the cartridge 1.
Since the height is set to be greater than the total height of the thickness of the cartridge 08 and the downward movement distance of the cartridge 108, there is no possibility of abutting interference with each other. Regarding the window hole 15a,
Since the door holder 15 is fixed to the cartridge holder plate 14, the window hole 15a is
Moves downward (or upward) together with 08. Therefore, if the door holder 15 is temporarily fixed to the frame 2 and the window hole 1
Assuming that 5a is stationary, cartridge 10
Compared to the window hole 15a in which there is a gap between the top and bottom of the window hole 15a when the window 8 moves up and down, which may allow dust to enter, the window hole 15a of the present application does not create a gap, so there is no risk of dust entering, improving performance and reliability. It can improve sex.

Next, load the cartridge 1 during loading.
To explain the operation of the cartridge 08 itself, first, when the rear end of the cartridge 108 roughly contacts the rear side plate portion 21a of the eject plate 21, the guide convex portion 14h of the cartridge holder plate 14 engages the engagement convex portion 112a of the belt 112. The engagement convex portion 112a is slid in the direction of arrow A relative to the cartridge 108. Therefore, the shutter 111 is pulled by the belt 112 and begins to rotate clockwise against the spring means, and the elongated holes 109b and 109c are unblocked, and the floppy disk 110 is released from the elongated holes 109b and 109c. is peeked out. Further, at the rearward sliding limit of the cartridge 108, the clamper 33, which had been riding on the upper surface of the cartridge chassis 109, is pushed into the center hole 109 by the coil spring 32.
a, press the hub 110a downward, and place the floppy disk 11 between it and the disk table 91.
Clamp 0. Also, cartridge holder plate 14
The guide plate 29 of the clamp lever plate 26 when moving downward.
The pad support arm 48 also moves down integrally.
The guide pin portion 48b is guided and slid relatively forward on the upper surface of the guide plate 29 and rotated downward, so that the clamper 33 lightly presses the floppy disk 110 against the head 46 through the elongated hole 109b.
Also, when loading the cartridge 108, the sensors 4, 5, and 6 are connected to the notch 1 of the cartridge 108, respectively.
09f, corresponding to the left hole 109e and hole 109c, respectively. Therefore, first, the light from the sensor on the upper substrate passes through the notch 109f and reaches the sensor 4, so that the A side of the floppy disk 110 is brought into contact with the head 4.
It is confirmed that the head 46 is facing the head 46, and the light from the other sensor on the upper board is blocked by the shutter 113 of the left hole 109e.
The erase head is in an accidental erase prevention state in which it cannot operate.

Next, when the A side selection switch (not shown) of the A side and B side selection switch (not shown) of the disk 110 on the panel (not shown) further arranged on the upper board is pressed, the A side is confirmed by the sensor 4. A match is found, and side A becomes readable.

Next, when the playback switch (not shown) on the panel is pressed, the motor 83 is driven as described above, and the floppy disk 110 is rotated clockwise together with the rotor 95. When another detection hole (not shown) reaches the hole 109c, light from yet another sensor on the upper substrate passes through the detection hole and reaches the sensor 6. As a result, it is detected that the reading start position of each track on the floppy disk 110 coincides with the center line of the elongated hole 109b, and for example, the reading start position of the outermost track corresponds to the reproduction head of the head 46. Continued floppy disk 110
is rotated, and the information on the outermost track is sequentially read and reproduced by the reproduction head of the head 46. When the floppy disk 110 rotates once and the detection hole reaches the hole 109c again, the motor 83 is stopped, the disk 110 is also stopped, and the reading for one revolution is completed.

Next, the stepping motor 54 is rotated by a predetermined angle stepwise in the direction of the arrow E, and the carriage 45 slides stepwise by a predetermined distance in the direction of the arrow A via the belt 63.
corresponds to one track inside from the outermost circumference of the floppy disk 110. Then, the floppy disk 110 rotates once in the same manner and the information is read. Thereafter, in the same manner, the stepping motor 54 and the motor 83 are alternately driven to sequentially read information on a plurality of tracks.

When the reading of the predetermined track is completed and the motor 83 is stopped, pressing a stop push button switch (not shown) causes the stepping motor 54 to rotate continuously in the direction of arrow F. Then, the carriage 45 slides back in the direction of arrow B to the starting position where the projecting plate 45f blocks the light passing between the sensors 70 and 71, and the stepping motor 54 is stopped by the detection by the sensors 70 and 71.

Next, the ejection operation of the cartridge 108 will be explained. When the eject button 12 is pushed in the direction of arrow B, both cam plates 11 of the push cam plate 10 are slid together in the same direction. Therefore, the cartridge holder plate 14 has cam pins 27, 2 on both sides thereof.
8 is pressed and guided by the inclined cam portions 11a-2 and 11c-2 of the cam hole 11a and the cam portion 11c, respectively, and the cartridge 108 is pushed against the coil spring 43.
The upward movement is stopped when the cam pins 27 and 28 move to the horizontal cam portions 11a-1 and 11c-1, respectively. Along with this upward movement, the center hole 110b and the notch 110 of the floppy disk 110
c are separated from the shaft 90 and the pin portion 91a, respectively, and are inserted into the pair of positioning holes 10 of the cartridge 108.
9d is disengaged from the positioning pin 3 and the positioning lock is released, and the guide pin portion 48b of the pad support arm 48 is pressed upward by the guide plate 29 of the clamper lever plate 26, and the pad 49 is rotated upward. It separates from the elongated hole 109b. Moreover, the ejection plate 21 is also the cartridge holder plate 14.
When the cartridge 108 is released from the lock, the corrugated spring 42 presses the cartridge 108 to start sliding in the direction of arrow A. Therefore, the cartridge 108 receives the pressing force from the eject plate 21 and the belt 11.
The engaging protrusion 112a of the cartridge holder plate 1
Shutter 111 that presses the guide convex portion 14h of No. 4
Due to the resultant force of the spring return force of the spring means, the cartridge 108 is biased and slid in the direction of arrow A.
Cartridge 1 also acts on its own sliding inertia.
Approximately the front half of 08 is the window hole 44a of the front plate 44.
It is projected forward from. This causes the shutter 111 to be in the cartridge 108 itself and the belt 1
As the engagement protrusion 112a of No. 12 is slid back in the direction of arrow B along the groove 109g, it is rotated back counterclockwise and the elongated hole 1 is opened by the predetermined portion thereof.
09b and the hole 109c to protect the floppy disk 110.

At this time, the push cam plate 10 is pushed to the sliding limit in the direction of arrow B, and the cam pins 22b of the cam levers 22 of the side plates 9-1 and 9-2 are pressed by the front edges of the square cam holes 11b of both cam plates 11, respectively. 3, the cam pin 22b is returned to contact with the rear edge of the stopper hole 9d by being rotated back in the direction of the arrow H in FIG.
Also, the ejection plate 21 has its guide convex portion 21b.
returns to contact with the stepped portion 14b-1 and stops. The spring plate 30 of the clamp lever plate 26 also returns to its displacement, and the clamper 33 rides on the upper surface of the cartridge chassis 109 again.

Therefore, in the end, the operator only has to grasp the front protruding part of the cartridge 108 and pull it out in the forward direction to remove the cartridge 108 through the door holder 15 and the window holes 15a, 44a of the front plate 44 in sequence, and then the clamper 33 is displaced downward and returns to door 3.
5 also rotates back to close the window hole 15a.

Next, if you want to read side B of the floppy disk 110, turn the cartridge 108 over and
In the same manner as in the above case, the cartridge 108 is pushed onto the upper surface of the cartridge holder plate 14 via the front plate 44 and the door holder 15, and is further moved down to perform loading. In this case, the difference from the above A-side reading is that the engagement protrusion 112a of the belt 112 engages with the left guide protrusion 14h of the cartridge holder plate 14, and that the sensor 4 corresponds to the notch 109f. The point is that the light from the sensor on the upper substrate does not reach the sensor 4, and the reading of the B side is confirmed.

As described above, according to the floppy disk device of the present invention. A cam lever is pivotally supported on a fixed side plate, and a cam plate with an eject operation button and a cartridge holder plate are provided on the fixed side plate so as to be slidable in the front and rear directions and up and down directions, respectively, and the cam lever is rotated as the cartridge is pushed and slid;
The cam plate is slid forward by the collision between the cam parts of the cam lever and the cam plate, and the cartridge holder plate is moved downward by the inclined guidance of the cam parts between the cam plate and the cartridge holder plate. Since the cartridge is loaded into a predetermined position, the cartridge holder plate on which the cartridge is placed simply moves up and down.
The fitting of the cartridge hole to the positioning pin and the fitting of the center hole of the floppy disk to the motor shaft can be carried out reliably and stably, and the cam plate (eject operation button) can be displaced and projected forward during the above-mentioned loading. Therefore, when ejecting, the cartridge can be ejected by simply pushing the eject operation button on the cam plate, and the structure can be simplified without requiring an extra eject mechanism.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an embodiment of the floppy disk device according to the present invention, FIGS. 2 and 3 are exploded perspective views of the frame and loading mechanism of the device, and FIG. 4 is an exploded perspective view of the floppy disk device according to the present invention. 5 is an exploded perspective view of the door holder of the above device, FIG. 6 is a perspective view of the board unit of the above device, and FIG. 7 is a diagram of the floppy disk drive motor of the board unit. FIG. 8 is a vertical sectional view of the motor portion, and FIGS. 9 and 10 are a bottom perspective view of the device and an exploded perspective view of its essential parts, respectively. 1... Floppy disk device, 2,55...
Frame, 4-6, 70, 71...Sensor, 8...
...Loading mechanism, 9-1, 9-2...Side plate,
9c, 11a, 11b...Cam hole, 10...Push cam plate, 11...Cam plate, 11a-1, 11
c-1...Horizontal cam part, 11a-2, 11c-2
... Inclined cam section, 12 ... Eject button, 14 ...
...Cartridge holder plate, 15...Door holder,
21...Eject plate, 21e...Cam plate part, 2
2...Cam lever, 22a...Pressed part, 22
b, 27, 28...cam pin, 33...clamper, 44...front plate, 45...carriage, 46...
... Magnetic head, 48 ... Pad support arm, 5
2, 53... Guide bar, 54... Stepping motor, 63... Guide belt, 81... Board unit, 83... Motor, 87... Coil, 88...
... Hall element, 89 ... Stator, 91 ... Disk table, 94 ... Magnet, 95 ... Rotor, 102, 103, 104 ... IC chip, 1
05... Heat sink, 108... Floppy disk cartridge, 110... Floppy disk,
111,113... Shyatsuta.

Claims (1)

[Scope of utility model registration request] A floppy disk device in which a floppy disk cartridge inserted into a cartridge holder member of a loading mechanism is loaded to a predetermined position by the loading mechanism, and information on the floppy disk is recorded or reproduced by a head, The loading mechanism includes the cartridge holder member that has a first cam portion and is freely displaceable in the vertical direction, and a side member that is fixed to a frame on which a cam lever having a pressed portion and a second cam portion is pivotally supported. , a cam member which has the third and fourth cam parts and an eject operation button and is freely displaceable in the front and back direction, and when the floppy disk cartridge is inserted, the cam lever moves the pressed part to the cartridge. The cam member is pressed and displaced forward by the abutment between the second and fourth cam parts, and the cartridge holder member and a floppy disk device configured such that the cartridge is guided and displaced downward by abutment between the third cam portion and the cartridge is loaded.