JPH0741744U - Floppy disk drive - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a floppy disk device that is loaded into a predetermined position by a loading mechanism, and it is an object of the present invention to reduce the size and cost. [Composition] A cartridge holder member (14) provided with a cam pin (27, 28) and biased downward, and a cam pin (27, 28).
28) and side plates (9-1, 9-2) that guide the up-and-down movement of the cartridge holder member (14), and horizontal cams (11a-1, 11c-) that engage with the cam pins (27, 28). 1) and the inclined cam part (11a-2,11c-
2) and the cam pins (27, 28) have horizontal cam parts (11a-1, 11).
c-1) When engaged with the cartridge holder member
A cam plate (10) configured to restrict the lowering operation of the (14) and allow the lowering operation of the cartridge holder member (14) in a state of being engaged with the inclined cam portions (11a-2, 11c-2); The cam plate by inserting the floppy disk cartridge (108).
A cam lever (22) that acts on (10) and unlocks the cartridge holder member (14) by the cam plate (10) is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a floppy disk device, and more particularly to a floppy disk device configured to load a floppy disk cartridge to a predetermined position by a loading mechanism.

[0002]

[Prior art]

 In general, a floppy disk, which is a kind of porcelain disk for storing information, has recently begun to be used in word processors and the like. There are currently two types of floppy disks with an outside diameter of 8 inches and 5 inches, each of which is inserted into the mounting device while being covered by a paper cover having a window hole, and mounted by the head of the mounting device through the window hole. Information is recorded or reproduced on the floppy disk.

However, although a floppy disk having an outer diameter of 3 inches has been developed this time, it is housed in a cartridge (floppy disk cartridge) for convenience of handling because the outer diameter is smaller than that of a conventional floppy disk. Therefore, in the case of a floppy disk device having an outer diameter of 3 inches, it is necessary to mount the floppy disk cartridge together with the device to record or reproduce the information. For this reason, the 3-inch floppy disk device is provided with a loading mechanism for loading and unloading the floppy disk cartridge.

Since the floppy disk must be mounted on the disk table, the loading mechanism moves the floppy disk to a position directly above the disk table and lowers the floppy disk transferred to this position. Then, two operations are performed, namely, the operation of placing on the disk table.

Conventionally, a loading mechanism provided in a 3-inch floppy disk device is configured to perform the above two operations by rotationally displacing a cartridge holder member into which a floppy disk is inserted (so-called kangaroo pocket type). Of the above) and a configuration in which the above two operations are performed by using a link mechanism.

[0006]

[Problems to be solved by the device]

 However, among the above-mentioned conventional floppy disk devices equipped with a loading mechanism, the kangaroo pocket type floppy disk device inevitably needs a space for rotationally displacing the cartridge holder member, and this space becomes a dead space. However, there was a problem that it would become large.

Further, in the floppy disk device in which the loading mechanism is configured by the link mechanism, there are problems that the number of parts of the loading mechanism increases, the product cost increases, and the assembling process becomes complicated.

The present invention has been made in view of the above points, and an object of the present invention is to provide a floppy disk device which can be downsized and reduced in cost.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, in the present invention, a floppy disk cartridge inserted and placed in a cartridge holder member is loaded into a predetermined position by a loading mechanism, and a head records or reproduces information on the floppy disk. In the apparatus, the loading mechanism includes a cartridge holder member in which a floppy disk cartridge is inserted and removed, and two cam pins protruding toward the outside are provided on both sides, respectively, and the loading mechanism is provided at both sides of the cartridge holder member. The side plate that guides the up-and-down movement of the cartridge holder member by the engagement of the cam pin, and the horizontal cam portion and the inclined cam portion that are disposed between the cartridge holder member and the side plate and that engage with the cam pin. And has a floppy disk The disc cartridge is configured to be slidable in the inserting / removing direction of the disc cartridge. When the cam pin is engaged with the horizontal cam part, the downward movement of the cartridge holder member is restricted, and when the cam pin is engaged with the inclined cam part, A cam plate configured to allow the lowering movement of the cartridge holder member in accordance with the sliding operation, a spring member for urging the cartridge holder member in the lowering direction, and a cam plate that acts on the cam plate by the inserting operation of the floppy disk cartridge. And a lock releasing mechanism for releasing the lock of the cartridge holder member by the cam plate.

[0010]

[Action]

 With the above configuration, the floppy disk cartridge is loaded to a predetermined position only by the lifting and lowering operation of the cartridge holder member, so that the size of the apparatus can be reduced. Further, since the loading mechanism can be configured with a small number of parts, the assembly process can be simplified.

[0011]

【Example】

 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 a frame periphery of the above device and a loading mechanism which is an essential part of the present invention.

The floppy disk device 1 has a frame 2. As shown in FIG. 2, the frame 2 is molded by aluminum die casting, and has a central convex portion 2a (having a central hole 2b and three holes 2c) and a pair of convex portions 2d (each having a small diameter portion 3a) at the front of the upper surface. Sensor 3 having a slot 2e and housing light-receiving elements, respectively (for detecting surfaces A and B of the disc), 5 (for detecting erroneous erasure prevention state), 6 (for disc). (For detecting the recording or reproduction start position of the track on the track), has side screw holes 2f and 2g, a support plate portion 2h (having a pair of recesses 2i and screw holes 2j), and rearward. A motor housing hole 2k (having a pair of positioning protrusions 21 inside), screw holes 2m on both sides thereof, a square protrusion 2n (having a recess 2p and a screw hole 2g, and an L-shaped support 2r and a screw hole on the right side). 2r-1), three L-shaped supporting portions 2s 2t, having 2u (each having a screw hole 2s-1,2t-1,2u-1).

The support portions 2r and 2s are exactly overlapped in the front-rear direction (directions of arrows A and B) on the inside of each L-shape, and the support portions 2t and 2u are also overlapped in the same manner. A steel plate 7 is screwed into the lower surface recess 2v of the frame 2, and a part of the steel plate 7 is seen through the groove 2e. The sensors 4, 5 and 6 face three sensors (each housing a light emitting element) arranged on a substrate (not shown) fixed above the frame, and receive light from these sensors as appropriate. is there.

Reference numeral 8 denotes a loading mechanism, as shown in FIG. 3, both side plates 9-1 and 9-2, a push cam plate 10 (a pair of cam plates 11 are connected by a screw 16 via a connecting rod 13 having an eject button 12). The cartridge holder plate 14 (having the door holder 15) and the eject plate 21. The side plate 9-1 includes a pair of mounting holes 9a, an engaging hole 9b, a vertical cam hole 9c, a stopper hole 9d, a spring accommodating hole 9e (having a spring hooking protrusion 9f), an engaging protrusion 9g, and an elongated hole. 9h, the inner cam lever 22 (lock releasing member) is pivotally supported by a pin 23, and a pair of guide pins 24, 25 are fixedly installed. The cam lever 22 is configured to have an upper end pressed portion 22a and a left and right lower end cam pin 22b as a second cam portion. The side plate 9-2 has an opposite shape to the side plate 9-1, and the both side plates 9-1 and 9-2 are screwed to the front both sides of the frame 2 by the screws 36 through the mounting holes 9a and the screw holes 2g. To be done.

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

The cartridge holder plate 14 includes a center hole 14a, a guide groove 14b (having a step portion 14b-1), both side holes 14c, a rear side plate portion 14d, a clamp lever plate 26 fixed to the hole, and a front end pair. It has a butt plate portion 14e, spring-hanging convex portions 14f and 14g on both sides, a guide convex portion 14h, a guide plate portion 14i, and cam pins 27 and 28 provided on the respective lower cut and raised plate portions. The clamp lever plate 26 has a guide plate 29, a pair of lower panel plates 30, and a resin taper clamper 33 supported on a pin 31 via a coil spring 32.

The door holder 15 is made of resin, and as shown in FIG. 5, a step portion 15b at the rear peripheral edge of the window hole 15a, a pair of engaging rods 15c (each having an engaging groove 15d), and a pair of convex portions. 15e, which is urged by the metal plate door 35 and the torsion spring 41 to the pin 34 inserted into each convex portion 15e to abut the step portion 15b to close the window hole 15a. As shown in FIG. 3, the door holder 15 is integrally attached to the cartridge halter plate 14 by elastically fitting the engaging recesses 15d of the engaging rods 15c to the engaging projecting plate portions 14e.

The eject plate 21 is U-shaped, and has a pair of guide protrusions 21b of the rear plate portion 21a, upper and lower guide protrusions 21c and 21d on both sides, and an outer cam plate portion 21e as shown in FIG. The eject plate 21 is interposed between the upper surface of the cartridge holder plate 14 and the clamp lever plate 26, and two sets of upper and lower guide convex portions 21c and 21d are guide-fitted while sandwiching the guide plate portion 14i and the guide convex portion 21b is formed. A pair of coil springs are fitted in the guide groove 14b so as to be slidable in the directions of arrows A and B, and are usually stretched between the lower guide protrusions 21d and the spring hooking protrusions 14f of the cartridge holder plate 14, respectively. The guide convex portion 21b is urged in the direction of the arrow A by 42 and abuts against the stepped portion 14b-1 and is stopped.

The cartridge holder plate 14 (with the door holder 15 and the eject plate 21 already assembled) is arranged between the cam plates 11 of the push cam plate 10, and the cam pins 27 on both sides are provided with the cam holes 11 a of the cam plate 11, respectively. Of the horizontal cam portion 11a-1 and the vertical cam holes 9c of the side below 9-1 (9-2), and the other side cam pins 28 abut on the horizontal cam portion 11c-1 of the cam portion 11c. In addition, the pair of coil springs 43 are placed between the spring-hanging protrusions 14g on both sides and the spring-hanging protrusions 9f of the side plate 9-1 (9-2) and are urged downward.

Reference numeral 44 denotes a resin front plate, which includes window holes 44a and 44b, a pair of engaging arms 44c (each having a claw portion 44d), a pair of projecting plate portions 44e (each having a hole 44f), and a pair of engaging concave portions. Having 44 g. With respect to the front surface of the frame 2, the front plate 44 fits the projecting plate portions 44e into the recessed portions 2i, and the claw portions 44d of the engaging arms 44c engage with the engaging holes 9b of the side plates 9-1 and 9-2, respectively. Further, the engaging concave portion 44g is engaged with the engaging convex portions 9g of the side plates 9-1 and 9-2, respectively, and temporarily fixed, and then screwed by the screw 45 through the rear hole 44f and the screw hole 2j.

In the loading mechanism 8, the push cam plate 10 is guided and regulated by the guide pins 24 and 25 of the side plates 9-1 (9-2) of the guide portions 11d and 11e of both cam plates 11 and, moreover, the square cam hole. 11b is regulated by the cam pin 22b of the cam lever 22 and the head of the screw 16 is regulated by the elongated hole 9h, respectively, so that it is slidable only in the front-rear direction (directions of arrows A and B), and the cartridge holder plate 14 is cammed. Since the pin 27 is guided and regulated by the vertical cam hole 9c of the side plate 9-1 (9-2), it is slidable only in the vertical direction (arrow C and D directions). However, in a normal state, as shown in FIG. 1, the push cam plate 10 is in a so-called eject position in which the push cam plate 10 is pushed and slid to the limit of the rearward direction (arrow B direction). -2) is guided and regulated in common by the vertical cam hole 9s and the horizontal cam portion 11a-1 of the cam hole 11a of the cam plate 11 and is slid to the upper direction (direction of arrow C) against the coil spring 43. It is in the eject position. The cam levers 22 of the cam levers 22 are pushed backward by the front edge of the square cam hole 11b of the cam plate 11 so that the outward protrusions of the cam pin 22b come into contact with the rear edge of the stopper hole 9d. It is in.

According to the loading mechanism 8, the side plates 9-1 and 9-2, the cam lever 22, the cam plate 11, and the cam pins 27 and 28 of the cartridge holder plate 14 of FIG. The interlocking mechanism portion such as the portion 21e is relatively large except for the floppy disk cartridge 108 (where the width is l, where l <L) which is inserted as will be described later, of the entire width (L) of the loading mechanism 8. It is housed in both sides of the small width (each becomes the width dimension (L-1) / 2), the interlocking mechanism portion of the loading mechanism 8 is downsized, and the entire apparatus 1 is downsized. Further, as compared with the loading mechanism using the conventional link mechanism, the loading mechanism 8 of the present embodiment uses the cam mechanism to move the cartridge holder plate 14 up and down, so that the number of parts can be reduced. Therefore, the product cost of the floppy disk device can be reduced and the assembling process can be simplified.

Reference numeral 45 denotes a carriage formed by aluminum die casting, and as shown in FIG. 2, a pair of guide holes 45a, one guide recess 45b, a pair of projecting plate portions 43c, a pair of front and rear step portions 45d (each having a screw hole 45e), The lead wire 47 of the porcelain head 46, which has the one light-shielding projecting plate portion 45f and is housed in the front end projecting portion 4g, is led out from the hole 45h through the lower surface recess (not shown). The porcelain head 46 has a recording / reproducing head and an erasing head arranged side by side.

Reference numeral 48 denotes a resin pad support arm, which has an arm body portion 48 a bent in a V shape, a guide pin portion 48 b, a pad 49 planted on the lower surface of the tip thereof, and a pair of projecting plate portions 48 c. On the other hand, each protruding plate portion 48c is fitted to the outside of each protruding plate portion 45c and is pivotally supported by a pin 50, and is further biased by a torsion spring 51 in the direction in which the pad 49 moves downward. Press lightly against the head 46. Note that the configurations of the head 46 and the arm 48 are not limited to the above-described structure, and conversely, a pad may be provided on the carriage 45 and a head may be provided on the arm 48.

Reference numerals 52 and 53 are long and short guide bars, respectively. The guide bar 52 is installed between the supporting portions 2r and 2s of the frame 2, and is pressed by the tapered portions 56a of the flat head screws 56 screwed into the screw holes 2r-1 and 2s-1, respectively, as shown in FIG. The L-shaped corners of 2r and 2s are commonly pressed against the horizontal and vertical planes of the L-shaped corners, and are positioned and fixed so as to be accurately aligned in the directions of arrows A and B. Similarly, the guide bar 53 is also installed between the supporting portions 2t and 2u and fixed by the flat head screws 56 in the directions of the arrows A and B. The carriage 45 has a pair of guide holes 45a fitted in the guide bars 52, and a guide recess 45b fitted in the guide bars 53, so that the carriage 45 can be precisely slidably mounted in the directions A and B. At this time, the projecting portion 45g is guided by slidingly contacting the steel plate 7 in the groove 2e, and the pad supporting arm 48 is urged by the guide pin portion 48b to contact the guide plate 29 of the clamp arm 26 and the head 46 is guided. Will be stopped at a position away from.

Reference numeral 54 is a stepping motor, and a U-shaped metal plate frame 55 (having an L-shaped elongated hole 55c that grows between the lateral vertical plate portion 55a and the horizontal plate portion 55b) is fitted to the front surface as shown in FIG. The belt presser 64 is screwed to the ring 62 press-fitted to the output shaft 61 via the thin spring plate guide belt 63. The guide belt 63 has a left head portion 63a (having a hole 63b), a strip portion 63c, and left and right slits 63d (having a central hole 63e and a hole 63f on both sides thereof) as shown in the circle mark in FIG. After the central hole 63e is inserted by the screw 65 and fixed to the output shaft 61, the central hole 63e is wound around the outer periphery of the ring 62 in a cross shape, and the head portion 63a and the strip portion 63c are inserted into the slit 63d. .

The stepping motor 54 is housed in the housing hole 2k of the frame 2, and the front surface of the frame 55 is brought into contact with the inner side surfaces of the pair of ridges 21 and the respective horizontal plate portions 55b are brought into contact with the upper surface of the frame 2 for positioning. Then, it is fixed by the screw 66 through the long hole 55c and the screw hole 2m. Thereafter, the guide belt 63 is brought into contact with the front and rear step portion 45f in a state where both ends of the guide belt 63, which are wound in the above-mentioned intersecting shape, are pulled and tensioned in the directions of arrows A and B, respectively, and the holes 63b and the front screw are provided. It is fixed by a screw 67 through the hole 45e, the hole 63f, and the rear screw hole 45e, respectively. As a result, when the output shaft 61 rotates stepwise in the direction of arrow E or F, the strip portion 63c relatively moves in the slit 63d, and the carriage 45 reciprocally slides stepwise in the directions of arrows A and B.

The inner side surfaces of the pair of ridges 21 are machined so as to exactly coincide with the directions of arrows A and B, and the front surface of the frame 55 is also centered so as to be perpendicular to the axis of the output shaft 61. Therefore, when the motor 54 is assembled, the axis line of the output shaft 61 is accurately orthogonal to the slide treasury of the carriage 45, and the operation accuracy can be improved. The start position of the carriage 45 can be easily set by integrally moving and adjusting the motor 54 and the carriage 45 in the directions of arrows A and B by a margin of the mounting long hole 55c of the motor 54.

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 at a substantially intermediate position between the guide bars 52, 53. Since the carriage 45 is mounted so as to extend in a parallel direction, the carriage 45 is provided with a sliding force that is in the sliding direction and is substantially in the middle position of the guide restricting portion by the guide bars 52 and 53 on both sides of the carriage 45. It does not receive the twisting direction and can slide smoothly without backlash. Further, since the driving point of the guide belt 63 (intersection of the belt 63) is substantially coincident with the axial height of the guide bars 52, 53 when viewed in the height direction, the carriage 45 does not receive the rotational force in the vertical plane and rattles. It can slide more smoothly without causing.

Reference numeral 68 denotes a switch unit for detecting the start position (rear slide limit) of the carriage 45. The resin switch case 69 is made of metal and has a pair of sensors 70 and 71 (each housing a light emitting element and a light receiving element). The support plate 72 is inserted into a pair of square holes 72 a, stacked, and fixed by screws 73. In the switch unit 68, the projecting plate portion 72b of the support plate 72 is fitted into the recessed portion 2p of the projecting portion 2n of the frame 2, and is fixed by the notch 72c and the screw 74 through the screw hole 2q. Into the gap between the pair of sensors 70 and 81, the protruding plate portions 45 of the carriage 45 that have reached the slide limit in the direction of the arrow B are fitted, and the light passing between the sensors 70 and 71 is blocked, so that the slide limit (carriage 45 The start position) is detected, and the rotation of the stepping motor 54 in the direction of arrow F is stopped.

Reference numeral 81 denotes a substrate unit, and as shown in FIGS. 6, 7, and 9, a wiring print is arranged on the upper surface of the substrate 82 and circuit elements such as IC chips are arranged on the lower surface, respectively, and the right side of the substrate 82 in FIG. Half of them are the floppy disk rotation drive motor 83 and the motor 83 drive circuit, and the left half of the substrate 72 is the stepping motor 54 drive circuit.

As shown in FIG. 8, the motor 83 includes an aluminum rotor hub 84, a shield plate 96 (having three holes 96a), a fixing ring 85, a magnetic material yoke 86, six coils 87, and three holes. A stator 89 side made up of elements 88 and a rotor 95 side made up of a shaft 90, a disk table 91, a rotor holder 92, a rotor 93, and a magnet 94 are arranged via a ball bearing 101. The rotor hub 84 of the stator 89 has a hole 84a and a flange portion 84b (having a triple screw hole 84c). The ball bearing 101 is fitted in the hole 84a and the yoke 86 is press-fitted in the lower surface of the flange portion 84b. The lower end of the hub is fitted into the hole 82a of the substrate 82, the fixing ring 85 is fitted to the downward protruding portion, and the caulking and fixing is fixed, and the shield plate 96 is fitted to the upper surface of the collar portion 84n.

As shown in FIG. 7, the coils 87 are each formed by winding in the shape of a flat triangular loop, and their leads are properly connected and fixed to the wiring prints at 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 embedded in the hole 82b of the substrate 82 formed in the center of the three coils 87, and its leads are appropriately connected to the wiring print. The shaft 90 of the rotor 95 is fitted into the ball bearing 101, the brass disk table 91 (having the pin portion 91a) is press-fitted into the upper protruding portion, and the rotor holder 92 is press-fitted into the lower protruding portion. Further, a rotor 93 in which a magnet 94 (N poles and S poles are alternately magnetized at eight equally divided positions in the circumferential direction) is housed and fixed to the rotor holder 92 is fitted and caulked and fixed.

In addition, angular magnet prints (not shown) for frequency power generation are arranged in the circumferential direction at positions facing the magnets 94 on the lower surface of the substrate 82. According to the configuration of the motor 83, since the Hall element 88 is embedded in the hole 82b of the substrate 82 and is contained within the thickness of the substrate 82 plus the height of the coil 87, the Hall element 88 is simply disposed on the upper surface of the substrate 82. The height of the motor and the overall height of the device 1 can be made smaller than in the case where the upper portion of the hole element projects above the upper surface of the coil 87.

In FIG. 9, 102, 103, and 104 are IC chips for the motor 83 drive circuit, respectively, chip 102 is for the motor drive circuit, and chips 103 and 104 are for the motor speed control circuit, respectively. Since the chip 102 generates heat during use, it is devised for heat dissipation. That is, in FIG. 10, a pair of metal supporting plates 102a (each having a hole 102b) is integrally formed on the chip 102 in advance. Reference numeral 105 denotes a heat sink made of aluminum, 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 can be loosely fitted, and the nut 106 is screwed into the screw 106 through the holes 105b and 102b. 107 is screwed and fixed. Therefore, the heat generated from the chip 102 is transferred to the heat radiating plate 105 and is quickly radiated from the chip 102 to prevent the chip 102 from overheating.

The board unit 81 is housed in the lower surface recess 2v of the frame 2 and the upper portion of the rotor hub 84 is fitted into the center hole 2b as shown in FIG. 8 so that the disk table 91 and the upper end of the hub 84 are located above the frame 2. It is projected and fixed by three countersunk screws 116 through the hole 2c, the hole 96a, and the screw hole 84c.

In the method of driving the motor 83, first, when the three Hall elements 88 are energized, the predetermined Hall elements 88 have a predetermined magnetic flux formed between the magnet 94 and the yoke 86 and are passed therethrough. Generates direction signals. This is sent to a drive circuit such as the IC chip 102 on the lower surface of the substrate 82, and a predetermined coil 87 is energized by this drive circuit to generate a magnetic flux in the coil 87, and this magnetic flux repels the magnetic flux of the magnet 94. The rotor 95 rotates by a predetermined angle, and in the same manner, a predetermined Hall element 88 sequentially outputs a signal and a predetermined coil 87 is sequentially energized so that the rotor 95 continuously rotates at a constant speed.

Further, at this time, the magnetic flux of the magnet 94 traverses the frequency generating angular waveform print on the lower surface of the substrate 82 in the circumferential direction, and a waveform signal having a frequency corresponding to the rotation speed of the rotor 95 is generated in the print. The number of this waveform is also counted by the speed control circuit such as the IC chips 103 and 104 on the lower surface of the substrate 82 to detect the rotation speed of the rotor 95, and when the rotation speed deviates from the normal time and the rotation speed is changed. In this case, the energization switching timing of the coil 87 is varied according to the signal from the speed control circuit to control the rotation speed.

A floppy disk cartridge 108 has a 3-inch floppy disk 110 and a shutter 111 housed in a cartridge chassis 109 as shown in FIGS. The chassis 109 has a central hole 109a, a head reading slot 109b, a track reading start position detecting hole 109c, a pair of positioning holes 109d, a pair of erroneous erasure prevention detecting holes 109e, and one cartridge surface detecting. As shown in FIG. 1, the hub 110a (having the center hole 110nb and the notch hole 110c) of the disk 110 is peep-disposed in the center hole 109a as shown in FIG.

The shutter 111 is made of a metal plate and has a predetermined layer shape on the upper and lower surfaces of the disc 10, is rotatable concentrically with the disc 110, and is biased counterclockwise by a spring means (not shown). Then, it is stopped at the position shown in FIG. 3 and the long hole 109b and the hole 109c are closed by its predetermined portion. Further, 112 is a flexible belt, which is wound around the shutter 111 at a predetermined angle, the left end of the belt is fixed to the shutter 111, and the engaging protrusion 112a at the right end of the belt is in the right-side recess 109g in the arrow A and B directions. It is slidably fitted.

Further, the pair of holes 109e can be opened and closed by manually switching and sliding the pair of shutters 113 arranged corresponding to the holes 109e, respectively. When the light reaching to is blocked, the erasing of the head 46 is made inoperable to prevent erroneous erasing of information on the disk 110.

Next, the operation of the device 1 will be described. As shown in FIG. 3, the floppy disk cartridge 108 is fitted into the window hole 15a of the door holder 15 through the window hole 44a of the front plate 44, and the door 35 is pushed against the spring 41 as it is further pushed in the direction of arrow B. Then, the cartridge holder plate 14 is pushed and opened. At this time, the both-side recessed ridges 109g of the cartridge 108 are guide-fitted to the both inner guide protrusions 14h of the cartridge holder plate 14, respectively, so that the cartridge 108 is prevented from rising when being pushed. Then, first, the clamp 33 is mounted on the upper surface of the cartridge chassis 109 against the coil spring 32, fitted into the eject plate 21 of the cartridge 108, and abutted on the rear side plate portion 21a of the eject plate 21.

Thereafter, the cartridge 108 and the eject plate 21 are integrally pushed in the direction of the arrow B against the coil spring 42. At this time, the upper surface of the cartridge chassis 10 is pressed downward by the pair of spring plates 30 of the clamper lever plate 26. As a result, the floating of the cartridge 108 is prevented, and when the rear side plate portion 21a approaches the rear side plate portion 14d of the cartridge holder plate 14, both side cam plate portions 21e of the eject plate 21 are side plates 9-1 and 9-2, respectively. The cam levers 22 are pressed and abutted against the pressed portions 22a of the respective cam levers 22 to rotate the respective cam levers 22 in the arrow G direction.

Then, the lower end cam pin 22b of each cam lever 22 pushes the front edge of the square cam hole 11b of each cam plate 11 of the push cam plate 10 in the forward direction (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 move to the cam holes 11a and the horizontal cam parts 11a-1 and 11c of the cam part 11c, respectively. It moves backward along -1.

At the time when the rear side plate portion 21a comes into contact with the rear side plate portion 14d of the cartridge holder plate 14 and the cartridge 108 and the eject plate 21 stop sliding in the direction of arrow B, the cam pins 27 and 28 are respectively cammed. The transfer of the hole 11a and the cam portion 11c to the inclined cam portions 11a-2 and 11c-2 has already been completed. Therefore, the respective cam pins 27, 28 press the inclined cam portions 11a-2, 11c-2 downward by the coil spring 43, and a forward component (direction of arrow A) slide component force is applied to the push cam plate 10 by the slope effect. To do.

Therefore, the push cam plate 10 is further slid forward by the above component force, and accordingly, the cartridge holder plate 14 (eject plate 21, cartridge 108) has its cam pins 27 and side plates 9-1 (9-). 2) Start sliding downward (in the direction of arrow D) by the guide of the vertical cam hole 9c. When the cam pins 27, 28 move relatively downward along the inclined cam portions 11a-2, 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. The downward slides are stopped respectively. 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 chain double-dashed line in FIG.

At the same time, the pair of positioning holes 109d of the cartridge 108 are fitted into the small diameter portions 3a of the pair of positioning pins 3 of the frame 2, respectively, and the center hole 110b of the floppy disk 110 is fitted into the protruding portion of the shaft 90. The hub 110a is fitted to the protruding portion of the shaft 90 so that the hub 110a is placed on the upper surface of the disc table 91, and the notch hole 110c is provided on the pin portion 91A by the adjustable rotation of the disc 110 itself by the function of the guide portion around it. When the floppy disk 110 is fitted, the floppy disk 110 is concentrically and integrally rotated with the rotor 95 of the motor 83, and the loading of the cartridge 108 at a predetermined position is completed. As described above, the cartridge holder plate 14 only moves up and down during loading and does not move in the directions A and B in the figure, so that the floppy disk device can be downsized.

Even when the cartridge 108 is pushed to the slide limit in the direction of the arrow B during the above operation, the front end of the cartridge 108 is slightly further forwardly dimensioned through the window hole 15a of the door holder 15 and the window hole 44a of the front plate 44. It is protruding. Therefore, the cartridge 108 further moves downward in this state, but the height of the window hole 44a of the front plate 44 is set to a large value in advance by the total height of the thickness of the cartridge 108 and the downward movement distance of the cartridge 108. Therefore, they do not abut and interfere 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 moves downward (or upward) integrally with the cartridge 108.

Therefore, if the door holder 15 is fixed to the frame 2 and the window hole 15a is stationary, a gap may be created above and below the window hole 15a when the cartridge 108 moves up and down, and dust or the like may enter. On the other hand, since no gap is formed in the window hole 15a of the present embodiment, there is no danger of dust entering and the performance and reliability can be improved.

Next, the operation of the cartridge 108 itself during loading will be described. First, when the rear end of the cartridge 108 comes into contact with the rear side plate portion 21a of the eject plate 21, the guide protrusion of the cartridge holder plate 14 is first. The portion 14h abuts on the engaging protrusion 112a of the belt 112 to slide the engaging protrusion 112a relative to the cartridge 108 in the arrow A direction. Therefore, the shutter 111 is pulled by the belt 112 and starts to rotate in the clockwise direction against the spring means to release the obstruction of the elongated holes 109b and 109c, and the floppy disk 110 from the elongated holes 109b and 109c. Is peeped out.

In the rearward slide limit of the cartridge 108, the clamper 33, which is mounted on the upper surface of the cartridge chassis 109, is dropped from the coil spring 32 into the center hole 109a and presses the hub 110a downward, so that the space between the clamper 33 and the disk table 91 is reduced. Clamp the floppy disk 110. Further, since the guide plate 29 of the clamp lever plate 26 also integrally moves downward when the cartridge holder plate 14 moves downward, the guide pin portion 48b of the pad supporting arm 48 is slid relatively forward on the upper surface of the guide plate 29. Then, the clamper 33 is rotated downward to lightly press the floppy disk 110 against the head 46 through the elongated hole 109b. Further, when the cartridge 108 is loaded, the sensors 4, 5 and 6 respectively correspond to the notch 109f, the left side hole 109e and the hole 109c of the cartridge 108, respectively.

Therefore, first, it is confirmed that the surface A of the floppy disk 110 faces the head 46 by the light from the sensor on the upper substrate reaching the sensor 4 through the notch 109f, and the light on the upper substrate is confirmed. The light from other sensors is blocked by the shutter 113 of the hole 109e on the left side, so that the erasing head of the head 46 is set in the erroneous erasure prevention state in which the erasing head cannot operate.

Subsequently, when the A-side selection switch of the A-side and B-side selection switches (not shown) of the floppy disk 110 on the panel (not shown) further arranged on the upper substrate is pressed, the sensor 4 When the coincidence with the confirmation of the A-side is performed, the A-side can be read.

Next, when the reproduction 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, and the same radial position as the hole 109c is formed. When one of the detection holes (not shown) provided in the above reaches the hole 109c, light from another sensor of 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 of the floppy disk 110 coincides with the center line of the long hole 109b. For example, the reading start point of the outermost track corresponds to the reproducing head of the head 46. It will be. Subsequently, the floppy disk 110 is rotated and the information of the outermost track is sequentially read and reproduced by the reproducing head of the head 46. When the floppy disk 110 makes one rotation and the detection hole reaches the hole 109c again, the motor 83 is stopped this time and the disk 110 is also stopped rotating, and the reading for one rotation is completed.

Next, this time, the stepping motor 54 is stepwise rotated in the direction of arrow E by a predetermined angle, and the carriage 45 is slid in the direction of arrow A by a predetermined dimension via the belt 63, and the head 46 is moved. Corresponds to only one track from the outermost circumference of the floppy disk 110. Then, similarly, the floppy disk 110 is rotated once to read the information. In the same manner, the stepping motor 54 and the motor 83 are alternately driven to sequentially read the information of a plurality of tracks.

When the motor 83 is stopped after the reading of the predetermined track is completed, a stop push button switch (not shown) is pressed, and the stepping motor 54 reversely moves continuously in the arrow F direction. The carriage 45 is rotatively driven and the carriage 45 slides in the direction of arrow B to the start position where the projecting plate portion 45f blocks the light passing between the sensors 70 and 71, and the stepping motor 54 is stopped by the detection of the sensors 70 and 71.

Next, the eject operation of the cartridge 108 will be described. When the eject button 12 is pushed in the direction of arrow B, both cam plates 11 of the push cam plate 10 are integrally slid in the same direction. Therefore, the cam pins 27 and 28 on both sides of the cartridge holder plate 14 are pressed and guided by the cam holes 11a and the inclined cam portions 11a-2 and 11c-2 of the cam portion 11c, respectively. When the cam pins 27 and 28 move to the horizontal cam portions 11a-1 and 11c-1, respectively, the upward movement is stopped.

Along with this upward movement, the central hole 110b and the notch 110c of the floppy disk 110 are disengaged from the shaft 90 and the pin 91a, respectively, and the pair of positioning holes 109d of the cartridge 108 are disengaged from the positioning pin 3 and are positioned and locked. When the pad support arm 48 is released, 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 is pivoted back upward so that the pad 49 is removed from the elongated hole 109b. Moreover, the eject plate 21 is also moved up integrally with the cartridge holder plate 14, and the unlocking of the cartridge 108 causes the coil spring 42 to press the cartridge 108 to start sliding in the direction of arrow A.

Therefore, the cartridge 108 is a resultant force of the pressing force of the eject plate 21 and the spring restoring force of the spring means of the shutter 111 in which the engaging protrusion 112 a of the belt 112 presses the guide protrusion 14 h of the cartridge holder plate 14. As a result, the cartridge 108 is urgedly slid to walk, and the sliding inertial force of the cartridge 108 itself also acts so that approximately the front half of the cartridge 108 is projected forward from the window hole 44a of the front plate 44. As a result, in the cartridge 108 itself, the shutter 11 is rotated counterclockwise as the sliding protrusion 112a of the belt 112 slides along the recessed line 109g in the direction of the arrow B, and the shutter 11 is longer than the predetermined portion thereof. The floppy disk 110 is protected by blocking the holes 109b and 109c.

At this time, the push cam portion 10 is pushed to the slide limit in the direction of arrow B, and the cam pins 22b of the cam levers 22 of the side plates 9-1, 9-2 are respectively moved by the front edges of the square cam holes 11b of the two cam plates 11. When pressed, the cam pin 22b is returned to contact with the trailing edge of the stopper hole 9d by rotating and returning in the direction of the arrow H in FIG. 3, and the guide projection 21b of the eject plate 21 contacts the step 14b-1. It will come back and stop. Further, the spring plate 30 of the clamp lever plate 26 is also displaced and returned, and the clamper 33 rides on the upper surface of the cartridge chassis 109 again.

Therefore, finally, the operator may grasp the front protruding portion of the cartridge 108 and pull it out toward the front side to pull out the cartridge 108 through the door holder 15 and the window holes 15a, 44a of the front plate 44 in order. The clamper 33 returns to the downward displacement and the door 35 also returns to rotate to close the window hole 15a.

Next, when it is desired to read the side B of the floppy disk 110, the cartridge 108 is turned over, and the cartridge 108 is placed on the upper surface of the cartridge holder plate 14 through the front plate 44 and the door holder 15 in the same manner as above. Push in and move it down to load. In this case, the difference from the case of the A-side reading is that the engaging protrusion 112a of the belt 112 engages with the left guide protrusion 14h of the cartridge holder plate 14, and the sensor 4 does not correspond to the notch 109f. The light from the sensor on the upper substrate of the sensor 4 does not reach the sensor 4, and the reading of the B side is confirmed.

[0064]

[Effect of device]

 As described above, according to the floppy disk device of the present invention, the floppy disk cartridge is loaded up to a predetermined position only by the lifting and lowering operation of the cartridge holder member, and the device can be downsized. Since the loading mechanism can be configured with a small number of parts, it has features such as being able to simplify the assembly process.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of a floppy disk device according to the present invention.

FIG. 2 is an exploded perspective view of a frame and a loading mechanism of the apparatus.

FIG. 3 is an exploded perspective view of a periphery of a frame of the apparatus and a loading mechanism.

FIG. 4 is a vertical sectional view showing a carriage guide mechanism of the above apparatus.

FIG. 5 is an exploded perspective view of a door holder of the above device.

FIG. 6 is a perspective view of a substrate unit of the apparatus.

FIG. 7 is a plan view showing a state in which a coil of a floppy disk drive motor of the board unit is exposed.

FIG. 8 is a vertical cross-sectional view of the motor portion.

FIG. 9 is a lower perspective view of the apparatus and an exploded perspective view of a main part thereof.

FIG. 10 is a lower perspective view of the apparatus and an exploded perspective view of a main part thereof.

[Explanation of symbols]

 1 Floppy Disk Device 2,55 Frame 8 Loading Mechanism 9-1, 9-2 Side Plate 10 Push Cam Plate 11 Cam Plate 12 Eject Button 14 Cartridge Holder Plate 14d, 21a Rear Side Plate 15 Door Holder 21 Eject Plate 22 Cam Lever 33 Clamper 42 Coil Spring 44 front plate 45 carriage 46 porcelain head 48 pad support arm 52, 53 guide bar 54 stepping motor 81 substrate unit 83 motor 91 disk table 102, 103, 104 IC chip 108 floppy disk cartridge 110 floppy disk 111, 113 shutter

Claims (1)

[Scope of utility model registration request] 1. A floppy disk device in which a floppy disk cartridge inserted and placed in a cartridge holder member is loaded to a predetermined position by a loading mechanism, and information of the floppy disk is recorded or reproduced by a head. A cartridge holder member in which a floppy disk cartridge is inserted and removed, and two cam pins are provided on both sides so as to project toward the outside, and a cartridge holder member is provided at both side positions of the cartridge holder member. A side plate that guides the up-and-down movement of the cartridge holder member, and is disposed between the cartridge holder member and the side plate,
It has a horizontal cam portion that engages with the cam pin and an inclined cam portion, and is configured to be slidable in the inserting / removing direction of the floppy disk cartridge. When the cam pin is engaged with the horizontal cam portion, A cam plate configured to restrict the lowering operation of the cartridge holder member and permit the lowering operation of the cartridge holder member with the sliding operation in a state where the cam pin is engaged with the inclined cam portion; And a lock releasing mechanism that acts on the cam plate when the floppy disk cartridge is inserted and unlocks the cartridge holder member by the cam plate. Floppy disk drive.