JPS60109070A - Floppy disk device - Google Patents

Abstract

PURPOSE:To position a head with high precision by screwing through a motor fitting plate spring during tracking adjustment and thus adjusting a stepping motor in two directions. CONSTITUTION:A projection part B which has one terminal positioned on a reference surface and the other terminal projected from the reference surface is provided so that the motor fitting plate 130 is movable in a plus and a minus P direction through a motor fitting leaf spring 151 according to the extent of clamping of an adjusting screw 131, and the center part is made lower than the reference surface, attaining high-level access feed. The stepping motor 129 of a main body 1 is movable in both a plus and a minus Q direction so as to minimize the amount of offset when the head is positioned.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention improves the access feed accuracy of the magnetic head of the Vj5 floppy disk device by one degree, and the adjustment direction of the stepping motor 129 is different from the conventional one-way adjustment ff: 2.
The high-precision access feed accuracy described above was achieved in one ship with 11 circumferences in the direction.

[Back of invention]

Conventionally, the stepping motor was fixed to the 129-metal main body l with screws 131 and 132 via the motor intake plate 130'5, and was fixed with a pulley 134VC steel bell l-116 firefly, a square washer 135, a screw 136, and a washer 137. . Then 1.31A, 131B screw %, loosen P
We have adjusted the ranking of the stepping motor 129 (by slightly moving 1z) in the (■, 0) direction. However, in this case, the stepping motor 1'29 via the motor radiation plate 130? Due to the current structure and processing technology, it is impossible to avoid variations in the accuracy of the mounting surface of the main body 1 to be mounted, mainly the lack of parallelism between the stepping motor mounting surfaces of the guide shafts 111 and 112 and the motor mounting plate 130. This causes the head mechanism 11 to
Access feed accuracy of 6? It has gotten significantly worse.

That is, the access feed accuracy is as shown in Fig. 29, x'>
Head positioning error [off trunk amount a (approx. 80μ)]
, y is the head access step, Cf) The state shown in the figure is a normal feed, but if the stepping motor 129 is not installed accurately, it will meander as shown by @ and ) had the disadvantage that the amount of off-trunk error increased.

[Object of the Invention] The object of the present invention is to adjust the stepping motor 1z9k, conventional P ((1, e direction)
It is an object of the present invention to provide an entire floppy disk device that enables more accurate access transmission by adjusting not only the direction but also the Q (■, e direction) direction.

[Summary of the invention]

The present invention is characterized by a main body having a substantially H-shaped cross section, a drive motor provided on the bottom side of the main body and serving as a drive source for the floppy disk, and a drive motor provided on the bottom side of the main body adjacent to the drive motor. a lower board, an iron plate mounting plate provided below the drive motor and on the top side of the main body; an upper board provided above the mounting plate; above the lower board and on the top side of the main body. a head mechanism provided, a head loading mechanism provided adjacent to the shim mechanism 7 on the upper surface side of the main body, and a head loading mechanism provided adjacent to the head mechanism and the head mechanism 47. The stepping motor is provided with a stepping motor serving as a driving source, a motor mounting plate spring and a motor mounting plate to be attached to the main body, and a stepping motor mounting surface of the main body has a concave shape, and the stepping motor is attached to the main body. The motor is attached via the motor mounting leaf spring and the motor mounting plate, and the access feed precision can be improved by changing the amount of tightening of the mounting screw 131 during the adjustment to minimize the total error when positioning the head metal, that is, the tracking adjustment. Parallelism ff between the guide shaft and the stepping motor, which is caused by variations in the machining accuracy of the stepping motor mounting surface and which has an adverse effect and cannot be eliminated, can now be corrected.

Hereinafter, embodiments of the present invention will be explained based on the drawings.

In the drawing, the main body l of the high-density mini-floppy disk device is made of die-cast aluminum.

In the center of the main body l, there is a hole la and a mounting screw hole lbt,
The drive motor 3 connects the screw 4 via the magnetic shield plate 2.
Fix it with. The drive motor 3 serves as a drive source for driving the entire floppy disk 5.

The drive motor 3 has a pilot part 3 that fits into the hole 1a.
A hub 3b, 1 for chucking the floppy disk 5 and the floppy disk 5 is provided.

The cross-sectional shape of the main body l is H-shaped. On the left and right of main body 1,
Provide notches ic and idi. Notch portion 1c.

A mounting plate 6 made of an iron plate with plastic outsert is fixed between the LD and the mounting plate 6 with screws 33.

On the mounting plate 6, a shaft 10 for operating the collet machine t'147, the head load mechanism 8, and the important switch 9 of the q drive moke 3 is rotatably supported by bosses 6a, 6b and a bearing plate 11. do. The bearing plate 11 is fixed by a coupling screw 12 and a spring washer 13.

A collet cam 14 made of plastics that operates the collet mechanism 7 and a pail cam 15 made of plastics that operates the head load mechanism 8 are outsert molded on the shaft 10.

A switch lever (-17) is rotatably supported on a shaft 6C provided on the mounting plate 6. 18 switch cams operated by the switch lever 17' are fixed to the shaft IO. To prevent removal, use bearing plate 1
This will be done in 1. At one end of the shaft 10, a plastic operating lever 19 is attached via a front panel 21 with a screw 22. A pin 20 for positioning the operating lever (-19) in the rotational direction is fixed to the shaft IO.

Important switch 9, hole 9a made in important switch 9,
It is attached by inserting the pin 6di provided on the mounting plate 6. The torsion spring 23 inserted into the shaft io' is locked at one end with a pin 24 fixed to the shaft 10,
The other end 23a is locked to the bottle 6d. Torsion spring 23
The other end 23a is bent into a hollow shape and used to hold down the important switch 9.

A front nozzle 21 made of Glasstics is integrally provided with a floppy disk insertion slot 25 at the center, a lamp hole 27 for a lamp 26 at the upper right end, and 28 shafts at the back surface of the upper left end. 1 for Suke 28, Torsion 29,
By inserting the lock lever 30 and the washer 31 and attaching 32 tapping screws, the lock lever 30
is rotatably provided.

The lock lever 30 has an engagement hole 30a with the shaft 28.

It has a cam 30b that abuts on the floppy disk 5, a retaining portion 30C that engages with the bin 24 provided on the shaft lO, and portions of upper and lower stoppers 30d and 30e. lock lever
30 is normally biased clockwise by a torsion spring 29. If the floppy disk 5 is not inserted to the predetermined position, that is, if it is incompletely inserted, the lock lever 30 rotates counterclockwise against the pressing force of the torsion spring 29, and the engaging portion 30C opens. By engaging with the pin 24, the clockwise rotation of the operating lever 19 is stopped.

When the floppy disk 5 is inserted to the specified position,
Lock Leno (=30 turns j) in the pressing direction of the torsion spring 29
+jJ t, Te, engagement f51130 C Since it is removed from the foot pin 24, the Xun Zuo Reno-19 can be rotated clockwise.

It is equipped with a collet machine Wq7t*, a collect shaft 34, a collet 35, a push spring 36, a ring cam 37, a bearing 38, a collar 39, an E ring 40, a washer 41, a col/t leaf spring 42, and an E ring 43. The collect shaft 34 includes a collet 35, a push spring 36,
After inserting the ring cam 37, bearing 38 and collar 39, insert the E ring 40 into the groove 34a of the collet shaft 34.
Press in.

After inserting the washer 41 and 42 collet machine springs above the E-ring 40 into the collet shaft 34, 43 E-rings are press-fitted into the groove 34b of the collet shaft 34. The collet 35, push spring 36, ring cam 37, bearing 38, collar 39, one shear 41, and collet machine spring 42 are rotatably provided on the collet shaft 34.

(See FIG. 12) The upper end of the collet shaft 34 is provided with a hollow portion 34C. By inserting the collet shaft 45 provided in the plate-shaped current receiver 44 into the hollow portion 34C, the collet shaft 34 is rotatably provided on the collet shaft 45. The corent receiver 44 is fixed to a boss 6e provided on the mounting plate 6 with a screw 46 and a washer 47.

Collet leaf spring 4211-1: A bifurcated 428 formed at one end, sandwiched between the locking shear 41 and the E-ring 43, compressed between the 14 hlet cams, the collet machine spring 42, and the take 4210 welded to it. It is supported by a plate 49. The other end of the collet plate ridge 42 has a hole 42C provided in the mounting plate 6 into which the shaft 6fK fits, and a hole 42C surrounding this hole 42C. A bent portion 421) formed by curving?
establish.

The upper part of the collet leaf spring 42 has a bent part 42e that the collet cam 14 comes into contact with, and a 111+ part provided on the mounting plate 6.
6. Provide elongated holes 42f and t to be inserted into g. Shaft 6gK,
Insert the conical spring 50 and washer 51. The collet machine spring 42 uses the hole 42Ck as a fulcrum, and the circular work IF spring 50
It is pushed upward by the spring force. When the floppy disk 5 is placed in a predetermined position and the operating lever 19 is pressed once in one direction, the collet cam 14 lowers the collet leaf spring 42. When the collet leaf spring 42 descends, the outer periphery of the hub 3bV (through the 5 floppy disks) and the C5 collet 35 is pressed, so as the drive motor 3 rotates, the flombie disk 5 rotates and the light emitting element 3d , is fixed to the M plate 3C of the drive motor 3.The light protect sensor 52, which receives light from the light emitting element 3d through the hole 1 (4) of the main body l, is located at the rib 5h provided on the mounting plate 6. , and fix it to the rib 61 provided on the mounting plate 6 using a tapping screw 53 and one shear 54.The light from the light emitting element 3d passes through the write protect sensor 52, the notch 5a of the floppy disk 5, and the hole 1e1 of the main body 1. It has a function to enable writing with a stray signal when receiving light.If the notch 5a is covered with tape or the like, writing to the floppy disk 5 will be disabled.

The rib 6 provided on the mounting plate 6 for the index sensor 55
Adjustably attach it to J using a kumping screw 56 and a one shear 57. The index sensor 55 includes light emitted from the light emitting element 3e provided on the substrate 3, and a hole 1f in the main body l.
and to the floppy disk 5 -8: By receiving light through the hole 5C4 of the time media 5b,
It's a bit tricky to start writing to a floppy disk.

Lead bamboo 158 from write protect sensor 52,
Lead wire 59 from index sensor 55 and lead wire 60iTj from important switch 9: After locking 6t to the three bins 6 provided on the mounting plate 6, press the pressing plate 49 so as to cover the locking part. is held on the mounting plate 6 by reaching the boss 6111 of the mounting plate 6 with the tapping screw 61 and washer 62.

Lower board 691'l:i, head terminal 70 and terminal group 71
At the same time, there is a sunken kite piece 5n on the pickup plate 6;
5o and guide pin 61+ KJ: are positioned together and insulating plate 69. l] (bosses 61 provided on the mounting plate 6 via r) using tapping screws 72 and washers 73. The pickup plate 6 has two sets of two pins 5r for fixing the head lead wire 121.

6sl will be provided. On the back side of the mounting plate 6, a contact Pk (stop pan) 75, 76'f, which completely protects the undulations when the mechanism 5b inside the floppy disk 5 rotates, is fixed.

Lower Jimi board 77 i-:l, Q#:,' Jt 7j1
Mi 78, card edge terminal 79 for system connection and power 4
It has an insulating plate 8 and is fixed to the F part of the main body l with screws 82 and washers 83.

- Sodrod (3, ls groove 81rJ: , solenoid 84, yoke 85, arm 86, shaft 87, 88, torsion spring 89, pale 90, 91, tension spring 92, 93,
Collar 94, pad 95, washer 97, E ring 98
, 99, 100, 101, 11 maintenance work 102° 103
and rock knights 104 and 105, which are fixed to the main body l with screws 96.

The head mechanism 1 [16 is for transmitting and reading signals from the computer system to and from the 7o disk 5 via the lower substrate 77 and the upper waste plate 69,
Carriage lo7, head arm 108, lower head 10
9 and an upper head 110.

The carriage 107 has a lower head 109 fixed at the tip of the central portion, and a j-1' moving hole 113 and guides 11/1. '
i have Carriage 1o7 (Identification part 1 of main body 1
G, th, xi, xj, shaft presser and screw 133
Fix it by.

A steel bell) 1fiil constant portion 115Th is integrally formed on the carriage 107. steel belt 116
The steel belt [i
- Steel belt seats 117 and 118 of 1 constant part 115,
Fix with screws 119 and washers 120.

Connect to lower head 10'9 and lead MVt is 7! 121
is connected to the head terminal 70 of the upper substrate 69. head-
Arm 1081ζL1 Projecting piece 1 that engages with the pail 91
22, a portion tosa where the J lower head 110i is provided, a portion 1081) for attaching to the carriage 107, and a leaf spring 108Ci for integrating this attachment portion 108b with the portion 1082. Attachment part 108b of carriage 107
, spring support plate 123, screw 126 and washer 127
It is fixed to the gear ridge 107 by. Torsion spring 124
is for proper contact between the floppy disk 5 and the upper head 110, and is attached to the spring support plate 123. Lead wire connected to upper head 110 +25P
,I:,Fix using the spring support plate 123.

A hend shield plate 128 for noise prevention is fixed above the upper hend 110.

The stepping motor 129 accesses the head mechanism 106, and has a motor mounting M t 3 .

It is fixed to the main body l through screws 131 and 132. A pulley 134 is attached to the motor of the stepping motor 129.
(Z fixed. Steel bell for Boo υ134) 1
16, the steel belt 116 is fixed with a square washer 135, a screw 136, and a washer 137.

The zero trunk sensor 138f''i is detected by a protruding piece 139 provided integrally on the carriage 107, and is fixed to the main body l with a screw 140. Head stopper screw 14
1 is screw-fitted into the main body 1 and fully controls the operation of the head mechanism 106.

At the tip of the motor lead wire 129a of the stepping motor 129 is a terminal 129b'? establish. The υ to D wire 121 tj connected to the lower hend 109 is connected to the head terminal 70 provided on the upper substrate 69 through a terminal 121 aP.

Terminal group 78 on lower board 77 and terminal group 71 on upper board 69? Terminals 142a and 142b are provided at both ends of the wiring 142 to be connected.
l will be provided. 142 wires are installed as close as possible to the side wall of the main body l. Solenoid lead M84arj of the solenoid 84: is connected to the terminal group 71 through the terminal 84b. The lead wires 58, 59, and 60 are grouped together to form a wiring 143, which is installed along the wall 110 of the main body 1, and is brought into contact with the group 78 at the end of the lower board 77.

Wiring 142, 143V, L Install so that the operation of the collet mechanism 7, hend load mechanism 8, and head mechanism 106 will not be disturbed.

The lead wire 125-1 connected to the upper head 110 is installed close to the (Ill) wall of the main body 1 and bent into a substantially U-shape. The wiring 142 is installed by a wiring guide 144 so as not to come into contact with movable parts such as the head mechanism 106.

The wiring guide 144 has a substantially U-shaped cross section, and has a small hole 144 provided opposite to the small hole 1k provided on the bottom surface of the main body 1.
a, a U-shaped piece 144b, a protrusion 144c that engages with a small hole lt provided on the side wall of the main body l, and a protrusion 1.44d that engages with a pin 1m provided on the bottom surface of the main body l. . The U-shaped piece 144b is attached to the main body l by screws 144e and washers 144f using the small holes 144a and lk'.
Fixed to.

The lower end 109 of the head mechanism 106 is shaped like a button. The gear ridge 107 is provided with a lower head 109 and a plate 145 made of a leaf spring.
;J to form. The fourth part 1072 has a flat protrusion 1 in the center part.
o7b'k, and small protrusions 107Ci are formed at the corners, respectively. Great l 45 ke, standing only on three sides” 2 walls 145
145a, 145b, and 145c, and a small hole 145d is provided on the remaining surface in close proximity to which the small protrusion 107C of the recess 107a engages. - head 109d, play) 14
It is disposed so as to contact the rising wall 145b of No. 5. Standing wall 145a, 14-5C of grate 145 and lower head 10
The part between the 9th and 9th positions is the lower head adhesive part 146. The lower head 109 is fixed to the plate 145 with adhesive. play) 145 i, :I:, small hole 145d and small protrusion 1
．． By fixing only the engaging portion of 07C with adhesive 1456, it is supported like a cantilever. Carriage 107
The flat part 107b and the small protrusion 107c are completely formed! 'ds l 07 Make it almost the same height as d. Upper surface gI8109a of lower head 109 and guide shaft 1
The lower head 109 and the plate 145' are adhesively fixed to the carriage 107 so that the lower head 109 and the plate 145' are parallel to each other. Make sure that the contact/11 agent flows into the back side (kill) of the lower bend 109i of the plate 145 where it is attached.
Form 7f and 107g into a box shape. (See all of FIGS. 14 to 17 and 19) At the end of the carriage 107, a claw 108d provided on the portion 108b of the head arm ios is fixed with adhesive. and recess 10
711 is dimensioned to be in a loose state, and after adjusting the position, it is fixed by injecting all of the adhesive into the four parts 10711. (See No. 18(9)j) Leaf spring 108c? -j: Herad arm 1 made of synthetic resin
08 Insert molding is performed on the entire forming portion 108a and the mounting portion 108b. The mounting portion 108b has an elastic support structure that moves up and down the outer periphery of the screw 126. head arm 10
8 is a claw 108 (fk supported in a cantilever shape as a fulcrum).

An upper head 110 is attached to the head arm 108 at a position facing the lower head 109. The upper head 110 is
It is fixed to the gimbal spring 147. gimbal spring 1471
'i. Fix to the back of the head arm 108 using screws 148. Above the part of the head arm 108 where the upper head 110 is located, there is a center pivot 1osei.
It is formed integrally with the upper hend 110. Senku Pivot 1
08e limits the upward movement of the upper head 110. (See FIGS. 10 and 2) A torsion spring 124 provided on the spring support plate 123 extends above the upper head 110 and is in contact with the center pivot 108e. For this reason, the spring constant of the torsion spring 124 can be set low, making it easy to design the head arm 108 so that it does not bend downward.

A space S4 is formed between the mounting plate 6 and the upper surface of the 4i-tri, as shown in FIG. Insertion guides p, p2 made of plastic are integrally formed on the bottom surface of the pickup plate 6.

The upper surface of the main body 1 forming a storage space for the floppy disk 5 is integrally formed with a multi-lobed rib iR+. Take the drive motor tacho 3: T on the bottom surface of the main body L, which is the J surface.
A large number of ribs l ]12 are formed into one piece.

Outside 44 of main body 1. As shown in Fig. 1, 91g1, etc., g has a recessed part (1f) for attaching it to the outer wall of the stepping motor main body, and a number of through holes. The ventilation hole IQ+ is used to cool the lower part of the head loading mechanism 8. The ventilation hole IQ2 is used to cool the lower part of the head mechanism 106.

The through hole 1 is used to cool the drive motor 3.

Installing various electrical parts and wiring? The printed circuit board formed by this process consists of an upper board 69, a lower board 77, and 9'.
To divide. The lower substrate 77 is adjacent to the drive motor 3 provided on the lower surface side of the main body l, and is provided on the lower surface (fill) of the main body J. The upper substrate 69 is located above the drive motor 3 and on the upper surface of the main body l. Fix it to the north of the phototaking plate 6 provided on the side.

By making the upper surface of the main body 1 lower on the side on which the head mechanism 1061f is installed (fJ') than on the side on which the 6 mounting plates are provided, all the storage space necessary for storing the head mechanism 106 and 8 hend load devices is secured.

Bosses 6a, 6b, shaft 5c, pier 6d, boss 6e.

輔6f, 6g, guide pins 6h, 6i, ribs 6j, pi/
6, 67, boss f) m, guide pieces 6n, 6o, boss 6
p, the pins 6r, 6s, and the insertion guide pInp2rj are all made of plastic, and are formed integrally with the mounting plate 6 by being soldered out.

According to the above steps, a floppy disk is inserted into the storage space S from the floppy disk insertion slot 25. Mechiia 5b medium heat on floppy disk 5! ff
l K-crossed 1-110 edge and hub 3 of drive motor 3
The state in which the outer circumference of 1) coincides with tri (hereinafter, this state 1)
IJ
, , Even if you try to move all 101 of the levers 19 by 1474, as shown in the fourth toy 1, the pin 24 engages with the engaging portion 30C of the lock lever 30, so /Yafu) 10 turns / Let L, 1, so important switch 9, collection mechanism 7 and head load tsuki 4#? 106 does not work.

When the operating lever 19 is not rotated, push the floppy disk 5tNj into the main body L. When the floppy disk 5 is fully inserted, the lock lever 30 is moved by the torsion spring 29 as shown in FIG. As the lock lever 3o rotates, the engaging portion 3Qc of the lock lever 3o separates from the pin 24, so that the shaft 10 can freely rotate.

Therefore, when the operating lever 19 is turned mb, the shaft 1
0 rotates, the important switch 9 is turned on, the collet leaf spring 42 of the collet mechanism 7 is pushed downward, and the pails 90, 91 of the head load mechanism 106 are pushed by the lower blade.

As shown in FIG. 6, when the collet leaf spring 42 of the collet mechanism 7 is pushed completely downward by the collet cam 14VC, it rotates downward against the spring force of the conical spring 5° as a fulcrum of the shaft 6f4. When the collet knot leaf spring 42 rotates downward, the collet 35 descends, and the floppy disk 5 is held between the collet 35 and the hub 3b of the drive motor 3.

In this state, when the drive motor 3 is rotated, the 20-tube disk 5 is rotated. When the shaft 10 is fully rotated and the collet cam 14i is returned to its original position, the collet leaf spring 4
2 is connected to the shaft 5 f 1 by a conical spring 5o. r - Rotates upward as a fulcrum. As the collet 35 rises due to this rotation, the collet 35 and the hub 3 of the drive shaft 3
The floppy disk 5 is released from being held between the storage space S and the storage space S, and the floppy disk 5 can be pulled out from the storage space S.

The head loading mechanism 8-3 operates as shown in FIGS. 24 to 27. That is, when the operating lever 19 is not operated, as shown in FIG.
The JIF value is higher than that of
is in the off state.

Insert the floppy disk 5 completely into the storage space S,
When the operating lever 19 is rotated, the pail 90 is pushed downward by the pail cam 15, and the pail 91 is pushed downward by the lock nut 1.04 provided on the pail 90, as shown in FIG. When the pail 91 descends, the head arm 108 also descends by the amount of the descent,
The cap b between the upper head 110 and the lower head 109 is smaller than the camp 3 shown in FIG. 24. At this time, the solenoid 84 is in the off state, and
\ Throat 110 is close to Melia on floppy disk 5.

When the solenoid 84 turns on in the state shown in Fig. 2i'C25, the arm 86 pushes the pale 91 downward and the head arm 10
8 also descends, and the upper head 110 picks up the floppy disk 5.
The lower head 109 contacts the upper surface of the media 2, and the lower head 109 contacts the lower surface of the media of the floppy disk 5. Information can be read from the floppy disk 5.

At this time, a cap Cff is provided between the pale 91 and the protrusion 122a provided on the head arm 108.

In the state shown in FIG. 26, when the operating lever 19 is rotated Δ and returned to its original position, the pale cam 15 is also rotated and returned to its original position, so that the pale 90 is pulled up by the tension spring 92.

At this time, the pail 90 engages with the protruding piece 122 and lifts the head arm 10EI as shown in FIG. Insert disk 5 into the main body
When pulling out the upper head 110 and lower head 109
Powerless 1! No force is applied.

The heads FM'1IIj i o 6 slide on guide shafts 111 and 112 by a stepping motor 129. That is, when the stepping motor 129 rotates, the steel bell l-116 is wound around the pusher 134, and the carriage 1 is moved by the amount that is wound up.
07 moves, h bend 1 against floppy disk
10 and the positions of the lower head 109 change. Flora - track position on disk, stepping motor 129
It can be freely selected by moving the carriage 107 in the forward and reverse directions.

In tracking adjustment, which is an adjustment to reduce errors in positioning the head 106, that is, off-trunk stitching, conventional adjustment only in the P (■, e direction) direction may result in parts, processing, and assembly accuracy. It is difficult to avoid the effects. Therefore, we have discovered that the above-mentioned effects can be alleviated by adjusting the Q (@) and e directions). Therefore, in the present invention, as shown in FIG.
The mounting screw (adjustment screw) 131 is tightened in the P (■, e direction) direction via the motor mounting plate spring 151 so that one end is aligned with the reference plane A so that it can be moved freely. By providing a protruding portion 13 whose other end protrudes from the reference plane A, and by configuring the central portion C to be recessed from A, highly accurate access feeding is possible.

Here, the carriage 117 is connected to the stepping motor 129
Figure 30 shows the state in which the position has been completely determined.

In the figure, ■ indicates a state in which the head 106 is positioned on the outer circumferential side, and @ indicates a state in which the head 106 is positioned on the inner circumferential side. In this case, the head 106 is most unstable when it comes to the inner circumferential side, and this is where the precision of the mounting surface of the stepping motor 129 of the main body l is most affected. That is, as shown in O in FIG. 30, if the mounting accuracy of the stepping motor 129 is good (the mounting surfaces 111 and 112 of the stepping motor 129 are parallel), the accuracy of the access feed will also be 29th.
The feed will be normal as shown by ■ in the figure. However, ■ in Figure 31
As shown in (b), the mounting part 1 of the stepping motor 129! If the head is bad, a force is applied to the head in the direction of the arrow in the figure, causing it to meander as shown at @ and 0 in Figure 29)) (3
The off-trunk error amount increases by 0 to 100 μ) compared to the iE normal off-track error amount of the same feed (about 80 μ).

The cause of this meandering is the stepping motor 129 of the main body 1.
Variations in processing accuracy due to the complexity of the machining surface, mainly in Gaidon Yaft i1i, ~112 and Stellar Bing Motor 1
29 The mounting surface and the motor mounting surface are not parallel to the J plate 130. This is due to the fJL crazy structure and the
(1) It is impossible to avoid this due to technical reasons. Therefore,
There will always be bends due to the installation of the stepping motor 129.

In order to correct the bends of -c, -t and make them parallel to the Stenbing motor 129fc guide shaft Ill, 112, it is also possible to correct the bends in the 5th direction of the 28th I21 (P direction as in h@O). That's what I did.

〔Effect of the invention〕

According to the present invention, the main feature of the floppy disk M is the most important point of compatibility, head positioning, and a simple mechanism with higher accuracy. , reliability can be improved.

[Brief explanation of drawings]

Drawing tj1 shows one embodiment of the present invention, Fig. 1 is an exploded perspective view of the main body part, Fig. 2 is an exploded perspective view of the mounting plate part, No. 31 - top view, Figs. 4 and 5. Figure 6 is an explanatory diagram of the operation of the D lever, and Figure 6 is a cross-sectional view of the Y part of the collet.
Fig. 7 is an exploded perspective view showing the shooting positions of the upper and lower substrates, Fig. 8 is an exploded perspective view of the head load section, Fig. 9 is an exploded perspective view of the head mechanism section, and Fig. 10 is the head 4; %
4f'f section, FIG. 11 is an enlarged view of the head mechanism, FIGS. 12 and 13 are exploded perspective views of the wiring guide attachment part, and FIG. 14 is an enlarged sectional view of the upper and lower head attachment parts. ,
Fig. 15 is an enlarged top view of the lower head attachment part, Fig. 16 is an enlarged perspective view of the lower head attachment part, Fig. 17 is an enlarged perspective view of the lower head, and Fig. 18 is an enlarged sectional view of the helad arm attachment part. Figure 19 is an enlarged perspective view of the main parts of the carriage;
The figure is the left side view of Fig. 3, the right side of Fig. 21-Fig. 3 (li1
1 side view, FIG. 22 is a sectional view taken along the line X-X in FIG. 3, FIG. 23 is a top view of FIG. 3, FIG. 24 is a top view of FIG. Figure 29 is an enlarged view of the stepping motor installation part, Figure 29 is an example of the access feed mechanism of a floppy disk device, Figure 30 is a view of the head being accessed by the stepping motor, and Figure 31 is the stepping motor installation. The force acting on the head depending on shooting accuracy is U7. ■...Body, 3...Drive motor, 5...Floppy disk, 6...Mounting plate, 8...Head load mechanism, 106...Head machine tiL l 29...
Stepping motor, 130...Motor mounting plate, 15
1...Motor installation No. 130 Thing 14 Mouth No. 10m No. 1] Senkoku 1g prisoner # is the country ≠ 211 Maz'J Kuni (Roji (ro)

Claims (1)

[Claims] 1. A drive motor (3) that serves as the drive source for the main unit (1t) and floppy disk (5), and a data processing board (6).
6), +67), the chucking part of the floppy disk (5), the head part (106) for reading data, and the carriage (1071 mounted on the io61) and the access 1 of the carriage (107). A stepping motor (129) for driving, and a stepping motor (129) for driving.
9) Motor mounting plate (1) for attaching to the main body +1)
30) and a steel belt (116) for converting the rotational motion of the stepping motor (129) into linear motion of the carriage (107), the main body having a concave mounting surface for the stepping motor (129). (1), the stepping motor (129) is connected via the motor mounting leaf spring and the motor mounting plate 11301.
'iWhen installing and adjusting tracking, use the mounting screws (13
By changing the tightening amount of 11, it is possible to adjust not only the conventional P (direction and e direction) but also the Q (■ direction and θ direction) direction. What made it possible kQ! J-type floppy disk device.