JP2001093246A - Disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of sticking/stepping during the soft landing of a pair of upper and lower magnetic heads on both of the upper and lower surfaces of a floppy (registered trade mark) disk. SOLUTION: A pair of upper and lower suspensions 182 and 183 are inclined and supported by the suspension offset parts or the suspension inclining and supporting parts of a pair of upper and lower suspension lifters so as to have opening angles θ41 toward the upstream side of the rotational direction (arrow direction E) of a floppy disk 1. In this state, a pair of upper and lower magnetic heads 101 and 102 are softly landed on both of the upper and lower surfaces of the floppy disk 1. Thus, the downstream end parts 101a and 102a of the magnetic heads 101 and 102 in the rotational direction of the floppy disk 1 are brought into contact with both of the upper and lower surfaces of the floppy disk 1 before the upstream end parts 101b and 102b thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a disk drive device most suitable for applying to a floppy disk drive for recording and / or reproducing a disk-shaped recording medium such as a floppy disk. It belongs to the technical field related to soft landing of a head on a disk-shaped recording medium.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 51, a small-capacity floppy disk drive FDD having a recording capacity of 1 to 2 MB uses a small-capacity floppy disk cartridge FDC as shown in FIGS. ing. Then, the small capacity floppy disk cartridge F
DC is loaded, and the disc table 2 relatively inserted into the center core hole 6 of the cartridge 5 is loaded.
3, the center core of the floppy disk 1 is chucked, and the floppy disk 1 is rotated at a low speed of 200 to 250 rpm by the spindle motor 21. Then, a pair of upper and lower magnetic heads is inserted into a pair of head insertion holes 7 of the disk cartridge opened at the time of loading, and is brought into contact with the upper and lower surfaces of the floppy disk 1.
The data is recorded and / or reproduced on the floppy disk 1 while seeking and tracking in the directions of arrows a and b along the scanning center which is the radiation from the center of the floppy disk 1 by the head transfer device.

On the other hand, the applicant of the present invention has proposed that the recording capacity be 10
A large-capacity floppy disk cartridge HFDC as shown in FIGS. 43 to 45, which has been increased to 0 MB or more, has been developed first. And this large capacity floppy disk
In the cartridge HFDC, 3 floppy disks 1
While rotating at a high speed of 600 rpm or more, a pair of upper and lower magnetic heads composed of flying heads are floated (flying state) from the upper and lower surfaces of the floppy disk 1 on the upper and lower sides of the floppy disk 1 by an air film (flying state), and high-density recording of data and / or Or, reproduction is performed.
Therefore, the floppy disk 1 used in the large-capacity floppy disk cartridge HFDC is designed to improve the surface roughness of the head, It is necessary to make the magnetic layer of the floppy disk 1 thinner. In order to reduce the thickness of the magnetic layer, it is necessary to reduce the size of the magnetic powder to 0.1 μm and the thickness of the coating to about 0.2 μm.

[0004]

Therefore, as shown in FIG. 51, a conventional small-capacity floppy disk drive F
In the case of DD, small-capacity floppy disk cartridge F
When the DC is inserted into the cartridge holder and the cartridge holder is unlocked by the trigger lever, the cartridge holder moves the small-capacity floppy disk cartridge FDC from the unloading position, which is the ascending position, to the loading position, which is the descending position. Loading at high speed, chucking the floppy disk 1 on the disk table 23,
A pair of upper and lower magnetic heads 28 and 29 are impactfully landed (installed) on both upper and lower surfaces of the floppy disk 1. However, since the magnetic layer of the floppy disk 1 of the small-capacity floppy disk cartridge FDC is very thick, a pair of upper and lower magnetic heads 28, 2
Even if the magnetic layer 9 was impacted on both the upper and lower surfaces of the floppy disk 1, there was no concern that the magnetic layer would be seriously damaged, and there was no particular safety problem. However, large capacity floppy disk cartridge HFDC
The floppy disk 1 whose recording capacity has been increased to 100 MB or more has a very small thickness of the magnetic layer.
If the magnetic disks 8 and 29 are landed on the upper and lower surfaces of the floppy disk 1 in an impact, the magnetic layer having a small thickness is greatly damaged, which causes a serious problem in quality and durability. .

Therefore, the inventor of the present invention has previously developed a slide type head elevating mechanism 501 as shown in FIGS. 40 to 42 as a head elevating mechanism for soft landing the head on a floppy disk. Filed. This slide type head lifting mechanism 501
First, a pair of upper and lower magnetic heads 28 and 29 are supported by the tips of a pair of upper and lower suspensions 502 and 503 made of a leaf spring, and the upper and lower
A pair of upper and lower magnetic heads 2 by the spring force of 2,503
8 and 29 are moved and urged in the direction of arrow f which is the direction in which the upper and lower surfaces of the floppy disk 1 are brought into contact with each other. Next, a slide plate 505 is arranged on the chassis 504, and an arm support portion 506 is formed vertically on the slide plate 505, and the base end of the pair of upper and lower head elevating arms 507, 508 is formed on the arm support portion 506. Horizontal fulcrum pin 5 on the side
09 so as to be rotatable in the directions of arrows A and B, which are the up and down directions.
7 and 508, a pair of upper and lower suspensions 50
2, 503 are arranged inside the suspensions 502, 503 in a state perpendicular to the longitudinal direction. A fixed guide shaft 510 mounted horizontally on the chassis 504 is connected to a pair of upper and lower suspensions 502, 50.
3, these suspensions 502, 50
3 is arranged in parallel with the length direction of the head, and a pair of upper and lower cam grooves 511 and 512 provided on the distal end side of the pair of upper and lower head raising / lowering arms 507 and 508 is a direction substantially orthogonal to the guide groove 510. , And D are slidably engaged in the direction D.

At first, as shown in FIG. 41D, before the head loading of the pair of upper and lower magnetic heads 28 and 29 is started, the slide plate 505 is mounted on the chassis. Arrow C on 504
And a pair of upper and lower head lifting arms 50
7 and 508 are a pair of upper and lower suspensions 502 and 503
Of the upper and lower cam grooves 511 and 512 are slid so as to be inserted in the direction of arrow C with respect to the guide shaft 510, and the upper and lower pairs of the cam grooves are Arrow A around the fulcrum pin 509 with the head elevating arms 507 and 508
It is rotationally driven to open in the direction. Then, the pair of upper and lower heads 507 and 508 open the pair of upper and lower suspensions 502 and 503 in the direction of arrow e against the spring force of the pair of upper and lower magnetic heads 2.
Heads 8 and 29 are unloaded to the head unloading position where the heads 8 and 29 are separated from each other in the direction of arrow e above and below the floppy disk 1.

Next, at the time of head loading, as shown in FIGS. 41 (C), (B) and (A), a slide plate 50 is provided.
5 is slid on the chassis 504 in the direction of arrow D to move the pair of upper and lower head lifting arms 507 and 508 from inside the pair of upper and lower suspensions 502 and 503 in the direction of arrow D.
The upper and lower cam grooves 51 are discharged in the
1, 512 are slid with respect to the guide groove 510 in the direction of arrow D so that these cam grooves 511,
512, a pair of upper and lower head lifting arms 507, 5
08 is slowly rotated around the fulcrum pin 509 so as to close in the direction of arrow B. Finally, as shown in FIG. 41A, a pair of upper and lower head lifting arms 50 is formed.
7 and 508 are a pair of upper and lower suspensions 502 and 503
The upper and lower magnetic heads 28 and 29 are closed by the spring force of the upper and lower suspensions 502 and 503 by closing the suspensions 502 and 503 to a position that does not interfere with the suspensions 502 and 503 at all. A non-impact soft landing (soft landing) is performed at a safe speed to a head load position where the head load contact is made in the direction of arrow f.

This slide type head lifting mechanism 501
According to the method, the pair of upper and lower magnetic heads 28 and 29 can be soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1 at the time of head loading. This is most suitable for application to a large-capacity floppy disk drive having a recording capacity of 100 MB or more for recording and reproducing an extremely thin floppy disk 1.

[0009]

However, like the head lifting mechanism 501 of the slide type, a pair of upper and lower head raising / lowering arms 507 and 508 are mounted on a chassis 504 by a pair of upper and lower suspension arms 50 by a slide plate 505.
Arrows C and D in directions substantially orthogonal to 2,503
The upper and lower pairs of head elevating arms 507 and 508 are driven to slide in the directions shown in FIG.
12 is a guide shaft 51 fixed on a chassis 504.
0, the pair of upper and lower head raising / lowering arms 507 and 508 are driven to open and close in the directions of arrows A and B, which are the upper and lower directions. Magnetic head 28, 2
9 is driven to open and close in the directions of the arrows e and f, the length of the pair of upper and lower head lifting arms 507 and 508 must be sufficiently long, and the structure is complicated. The number of assembling steps increases and the cost increases. Also, a pair of upper and lower head elevating arms 50 having a long length
7 and 508 are connected to a chassis 504 by a slide plate 505.
Since a large space for sliding drive in the directions of arrows C and D above must be provided on the chassis 504, it is difficult to save space, and the size reduction of the disk drive device is likely to be greatly restricted. While sliding the pair of upper and lower head lifting arms 507 and 508 in the directions of arrows C and D, the pair of upper and lower suspension
In the method of opening and closing 2,503 in the directions of arrows A and B, it is particularly difficult to control the soft landing speed of the pair of upper and lower magnetic heads 28, 29. ,
There is a danger that both will be damaged due to impact contact with 1b.

A pair of upper and lower head lifting arms 50
7 and 508 are a pair of upper and lower suspensions 502 and 503
Are slid in the directions of arrows C and D, which are perpendicular to the direction, and are driven to open and close in the directions of the arrows A and B, which are the up and down directions, to thereby form a pair of upper and lower suspensions 502 and 50.
3 is opened and closed in the directions of arrows e and f using the spring force, the pair of upper and lower suspension arms 502 and 503 are formed by the frictional force of the pair of upper and lower head lifting arms 507 and 508 when sliding in the directions of arrows C and D. In the directions indicated by the arrows C and D are likely to occur.
The landing posture at the moment when soft landings 8 and 29 were made on the upper and lower surfaces of the floppy disk 1 was likely to be unstable.

Particularly, in a large capacity disk drive,
While rotating the floppy disk 1 at a high speed of 3600 rpm or more, the pair of upper and lower magnetic heads 28 and 29 are soft-landed on the upper and lower surfaces of the floppy disk 1. For example, as shown by a solid line in FIG. At the time of soft landing, a pair of upper and lower magnetic heads 2 in the direction E of the rotation direction of the floppy disk 1
If the upstream end portions 28a, 29a of the floppy disks 8 and 29 come into contact with the upper and lower surfaces of the floppy disk 1 before the downstream end portions 28b, 29b, the floppy disk that is being rotated at a high speed is used. The air flow on the upper and lower surfaces of the disk 1 is the upstream end 28 of the pair of upper and lower magnetic heads 28 and 29.
a, 29a at high speed, the rolling action of the suspension 502, 503 in the direction of arrow F (torsion and vibration generated by restoring the torsion) and the like are induced by the entrainment action of the air flow, and a pair of upper and lower magnetic fields are generated. Stick Slip on the heads 28 and 29
ip) may occur, and the magnetic layers on both the upper and lower surfaces of the floppy disk 1 and the pair of upper and lower magnetic heads 28 and 29 may be damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to make a head land softly on a disk-shaped recording medium, and to prevent stick-slip from occurring at that time. It is intended to provide a disk drive device.

[0013]

In order to achieve the above object, the present invention provides a disk drive device in which a head is moved from a head unload position to a head load position via a suspension by a head elevating mechanism. A head attitude control means for bringing the downstream end of the head in the rotation direction of the disk-shaped recording medium into contact with the disk-shaped recording medium prior to the upstream end when the medium comes into contact with the medium; is there.

In the disk drive device of the present invention configured as described above, the head is moved from the head unload position to the head load position via the suspension by the head lifting / lowering mechanism to contact the disk-shaped recording medium. Landing can be performed, and at this time, by the head attitude control means, the end on the downstream side of the head in the rotation direction of the disc-shaped recording medium can be brought into contact with the disc-shaped recording medium before the end on the upstream side. With this configuration, the head can be soft-landed while the airflow on the surface of the disk-shaped recording medium flows smoothly between the head and the disk-shaped recording medium.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of a large-capacity floppy disk cartridge and a large-capacity floppy disk drive to which the present invention is applied are compared with existing small-capacity floppy disk cartridges and small-capacity floppy disk drives. The description will be made in the following order with reference to FIGS. (1) ··· Explanation of small capacity floppy disk cartridge and small capacity floppy disk drive device (2) ··· Explanation of large capacity floppy disk cartridge (3) ··· Outline explanation of large capacity floppy disk drive (4) ... Explanation of linear actuator (5) ... Explanation of guide spindle mounting device (6) ... Explanation of head assembly (7) ... Explanation of rotary head elevating mechanism (8) ··· Explanation of the latch mechanism (9) ····································································································································································・ Explanation of operation mode

(1) Description of a Small-Capacity Floppy Disk Cartridge and a Small-Capacity Disk Drive First, as shown in FIGS. 46 to 50, a floppy disk 1 made of a magnetic sheet having a diameter of 3.5 inches is prepared. The small-capacity floppy disk cartridge FDC using a small-capacity floppy disk having a structure adhered to the outer periphery of the center core 2 which is a disk made of a stainless steel plate has a recording capacity of the floppy disk 1 of 1 to 2 MB (megabytes).
Of small capacity. The small-capacity floppy disk cartridge FDC forms a flat, substantially rectangular cartridge 5 by upper and lower shells 3 and 4 formed of a synthetic resin, and the floppy disk 1 is rotatably housed in the cartridge 5. are doing.

At this time, the center core 2 of the floppy disk 1 is loosely fitted in the center core hole 6 formed in the center of the lower shell 4, and the cartridge 5 indicated by an arrow a in the small capacity floppy disk drive described later. The upper and lower shells 3 and 4 have a cartridge center P ₁ between the front end face 5 a which is the end in the insertion direction side and the center core hole 6.
A pair of upper and lower head insertion holes 7 in the shape of a long hole are formed. To open and close the pair of upper and lower head insertion holes 7, a shutter 8 having a U-shaped cross section formed by a pair of upper and lower horizontal plate portions 8a and 8b and a front end vertical plate portion 8c is provided. The shutter 8 is slidably disposed in a shutter slide recess 18 formed substantially in a U-shape outside the front end 5a and the front end 5a, and the shutter 8 is in the insertion direction along the front end face 5a. Arrow c which is a direction perpendicular to the direction of arrow a,
It is slidably mounted in the d direction. The shutter 8 is slid in the direction of arrow c to the closed position by a built-in shutter spring 8d.
The lower shell 4 of the cartridge 5 forms a front end face 5
A pair of right and left positioning reference holes 9 each composed of a perfect circular hole and an oval hole are formed at a position deviated to the side a. A pair of left and right semicircular concave portions 10 is formed at a position close to the front end face 5a side of the fourth. The upper and lower shells 3 and 4 as a whole are located at a corner 11a between the front end face 5a of the cartridge 5 and the right side face 5b which is one side face.
A slope 12 for preventing erroneous insertion, which is a so-called C-plane cut at 5 °, is formed. A write protector 13 for preventing erroneous erasure is incorporated in a corner 11b between the rear end face 5d of the cartridge 5 and the left side face 5c as the other side face, and the rear end face 5d and one side face, the right side face, are provided. A capacity identification hole 14 is formed in a corner 11c with the 5b.

A pair of upper and lower cleaning sheets 15, which are non-woven fabrics cut into a substantially horseshoe shape, are laid on the inner wall surfaces 3b, 4b of the upper and lower shells 3, 4 by bonding or the like. A lifter 16 for making the sheet 15 elastically contact the upper and lower surfaces of the floppy disk 1 from above and below is attached to one (or both) of the upper and lower shells 3 and 4 by bonding or the like. Accordingly, the floppy disk 1 is configured to be sandwiched from above and below between a pair of upper and lower cleaning sheets 15 and to be rotationally driven at a disk surface position at a height of approximately H _1/2 from the lower surface 5f of the cartridge 5. A pair of upper and lower shutter holes 8e having a long hole shape facing the pair of upper and lower head insertion holes 7 formed in the upper and lower shells 3 and 4 are formed in a pair of upper and lower horizontal plate portions 8a and 8b of the shutter 8. I have. Further, the upper and lower shells 3 of the cartridge 5,
The upper and lower surfaces 5e, 5f of 4 are formed with a label attaching recess 17 having a shape bypassing the rear end surface 5d.

Then, as shown in FIG. 51, this small-capacity floppy disk cartridge FDC is recorded and / or
Alternatively, a small-capacity floppy disk drive FDD, which is a lower-order disk drive for reproduction, has a disk table 23 and a carriage 26 and a head arm 2 which are rotationally driven by a spindle 22 of a spindle motor 21.
Gimbal plate (not shown) on the upper and lower opposing surfaces at the tip of 7
A pair of upper and lower magnetic heads 28, 2 attached via
9 and the like are stored. A magnetic sheet 24 for chucking, a rotation drive pin 25 for a small-capacity floppy disk FD, and the like are mounted on the disk table 23, and a head arm 27 is mounted on a head arm mount 26a of the carriage 26 by a leaf spring. It is rotatably mounted via arrows 30 in the directions of arrows e and f, which are the up and down directions. The head arm 27 is rotationally urged by a head pressure bonding spring (not shown) in the downward direction of arrow f. When the carriage 26 is horizontally driven in the directions of arrows a and b by the linear actuator, the head arm 27 is horizontally driven in the same direction integrally with the carriage 26, and a pair of upper and lower magnetic heads 28,
29 are configured to be horizontally moved integrally in the same direction.

At this time, the lower magnetic head 29 is disposed at a height reference position with respect to a mechanical base (not shown).
The upper magnetic head 28 is moved by an upper magnetic head elevating mechanism (not shown) as shown by a one-dot chain line.
51, between the unloading position raised by a predetermined height and the loading position for pressing the floppy disk 1 onto the lower magnetic head 29 as shown by a solid line in FIG. It is configured.

As shown in FIG. 51, before the loading of the small-capacity floppy disk cartridge FDC into the small-capacity floppy disk drive FDD, the upper magnetic head 28 is moved to the unloading position indicated by the one-dot chain line. Up in the direction of arrow e. Therefore, a small-capacity floppy disk cartridge FDC is inserted into a cartridge loading mechanism (not shown).
As shown by the dashed line, it is higher with respect to the lower magnetic head 29,
After horizontally inserting the small-capacity floppy disk cartridge FDC into the unloading position lowered with respect to the upper magnetic head 28 in the direction of arrow a, the cartridge FDC is lowered vertically by parallel movement to the loading position shown by the solid line by the cartridge loading mechanism. I do. Then, the small-capacity floppy disk cartridge FDC lowered to the loading position is horizontally mounted and positioned on a total of four cartridge positioning pins (not shown) installed in the small-capacity floppy disk drive FDD. You. Therefore, the small-capacity floppy disk cartridge FDC is loaded without any interference between the pair of upper and lower magnetic heads 28 and 29.

The small-capacity floppy disk
During the horizontal insertion operation in the direction of arrow a into the loading position of the cartridge FDC, the small-capacity floppy disk
The shutter 8 of the small-capacity floppy disk cartridge FDC is moved from the closed position shown in FIGS. 48 and 49 to the open position shown in FIG. 46 by a shutter opening / closing mechanism (not shown) installed in the drive FDD. 8d, the shutter 8 is slid in the direction of arrow d.
While the pair of upper and lower head insertion holes 7 is opened,
The pair of upper and lower shutter holes 8e and head insertion holes 7
Are inserted vertically inside a pair of upper and lower magnetic heads 28 and 29.

As shown by the solid line in FIG. 51, when the small-capacity floppy disk cartridge FDC is lowered vertically from the unloading position to the loading position in the direction of arrow f, the center core 2 of the small-capacity floppy disk FD is The spindle 22 is chucked on the magnet sheet 24 of the disk table 23, the spindle 22 is relatively fitted into the center hole 2 a of the center core 2 from below, and the rotation drive pin 25 on the disk table 23 is rotated.
Are fitted into the rotation drive pin fitting hole 2b formed at the eccentric position of the center core 2 relatively from below. Then, the small-capacity floppy disk cartridge FDC is moved from the unloading position to the loading position by an arrow f.
When the head arm 27 is vertically lowered in the direction, the head arm 27 is rotated in the arrow f direction from the unloading position to the loading position by the head pressure spring, and the upper magnetic head 28 is lowered in the arrow f direction from the unloading position to the loading position. And a pair of upper and lower magnetic heads 28,
29 is a pair of upper and lower shutter holes 8e and head insertion holes 7
The pair of upper and lower magnetic heads 28 and 29 are pressed against the upper and lower surfaces of the floppy disk 1 in the cartridge 5.

As described above, the small capacity floppy disk
When the loading operation of the small-capacity floppy disk cartridge FDC into the drive FDD is completed, the disk table 23 is driven to rotate by the spindle motor 21, and the center core 2 is driven to rotate by the rotation drive pin 25, whereby the floppy disk is driven. 1 is rotationally driven in the cartridge 5 at a low speed of, for example, 200 to 250 rpm. However, at this time, the upper and lower surfaces of the floppy disk 1 are driven to rotate while the upper and lower surfaces of the floppy disk 1 are in contact with the pair of upper and lower cleaning sheets 15 in the cartridge 5, and the upper and lower surfaces of the floppy disk 1 are automatically cleaned by the pair of upper and lower cleaning sheets 15. You. The carriage 26 and the head arm 27 are horizontally driven in the directions of the arrows a and b integrally by a linear actuator (not shown), so that a pair of upper and lower magnetic heads 2 is formed.
8 and 29 scan (seek and track) the floppy disk 1 in the directions of arrows a and b, and data is recorded and / or reproduced on the floppy disk 1.

The small-capacity floppy disk cartridge F after recording and reproduction of the floppy disk 1
The unloading operation of the DC to the outside of the small-capacity floppy disk drive FDD is performed in the reverse operation of the above-described loading operation. When the center core 2 is lifted vertically from the disk table 23 by a parallel movement to the unloading position indicated by the dashed line in the direction of arrow h, the head arm 27 is moved upward.
51 is rotated from the loading position to the unloading position shown by the solid line in FIG. The pair of magnetic heads 28 and 29 are relatively detached vertically outside the cartridge 5. When the small-capacity floppy disk cartridge FDC is pushed out of the small-capacity floppy disk drive FDD horizontally in the direction of arrow b at the unloading position, the shutter 8 is turned off.
48 and 49, the shutter 8 is slid in the direction of arrow c by the shutter spring 8d from the open position shown in FIGS.
The pair of upper and lower head insertion holes 7 of the cartridge 5 is closed by 8b.

(2) Description of large-capacity floppy disk cartridge Next, as shown in FIGS. 43 to 45, a large-capacity floppy disk recorded and / or reproduced by a large-capacity floppy disk drive HFDD described later. The disk cartridge HFDC is a small-capacity floppy disk
Similarly to the cartridge FDC, a large-capacity floppy disk HFD having a structure in which a floppy disk 1 made of a magnetic sheet having a diameter of 3.5 inches is bonded to the outer periphery of a center core 2 which is a disk made of a stainless steel plate is formed of synthetic resin. It is rotatably housed in a cartridge 5 constituted by upper and lower shells 3 and 4. Then, the recording capacity of the large-capacity floppy disk HFD is set to 10
In order to increase the size to 0 MB or more, preferably 300 to 700 MB, the magnetic films on both the upper and lower surfaces of the large capacity floppy disk HFD are thinned to the order of submicron,
In addition, the rotation speed of the large-capacity floppy disk HFD can be increased to a high-speed rotation range of 3600 rpm or more.

On the other hand, the large-capacity floppy disk cartridge HFDC has a recording capacity of 1 to 2 M in a large-capacity floppy disk drive HFDD described later.
B, small capacity floppy disk cartridge FD
C, the external dimensions and thickness of the cartridge 5 of the large-capacity floppy disk cartridge HFDC are substantially the same as the external dimensions and thickness of the cartridge 5 of the small-capacity floppy disk cartridge FDC. I have. Then, in a large-capacity floppy disk drive HFDD, which will be described later, the large-capacity floppy disk cartridge HFDC can be identified with the small-capacity floppy disk cartridge FDC so that the large-capacity floppy disk cartridge HFDC can be identified.
In the cartridge HFDC, the arrangement of the write protector 13 and the capacity discriminating hole 14 is reversed, and the newly provided large capacity discriminating hole 18 is formed at a position near one of the reference holes 9 formed in a perfect circular hole. ing. In this large-capacity floppy disk cartridge HFDC, the shutter 8 has a substantially T-shaped planar shape to increase the effective area inside the cartridge 5 and to prevent the small-capacity floppy disk cartridge FDC from being erroneously inserted. A groove 20 for preventing erroneous insertion corresponding to the inclined surface 12 of the front end face 5a of the upper surface 5e of the cartridge 5
1a. The rotation drive pin fitting hole 2b formed in the center core 2 of the floppy disk 1 in the large capacity floppy disk cartridge HFDC is the center core 2 of the floppy disk 1 in the small capacity floppy disk cartridge FDC.
The hole is formed to have a size sufficiently larger than the rotation drive pin fitting hole 2b formed in the hole a.

(3) General description of large-capacity floppy disk drive Next, as shown in FIGS. 25 to 31, a large-capacity floppy disk drive HFDD, which is an example of a disk drive, has a plate thickness. Upper and lower covers 42 and 43 pressed by a thin sheet metal are detachably attached to the upper and lower sides of a chassis 41 pressed by a thick sheet metal,
A front panel 44 made of a molded component (plastic molded product) is detachably attached to these front sides to form a flat rectangular parallelepiped drive body 45. A horizontally long cartridge insertion port 46 is formed on the upper end side of the front panel 44, and an inward opening / closing lid 47 is attached inside the cartridge insertion port 46. An eject button 48 and a light emitting display 49 for displaying the operation state of the drive are attached to the left and right sides of the lower portion of the front panel 44.

Then, inside the drive main body 45,
A spindle motor 51 and a disk table 53 mounted on the spindle motor 51 are disposed above the chassis 41 on the front panel 44 side. The disk table 53 is formed on the upper surface of the rotor of the spindle 52. On the upper surface of the disk table 53, a chucking magnet sheet 54 and a rotary drive pin 2 are provided.
5 etc. are attached. And the front panel 4
On the upper side of the chassis 41 on the fourth side, a cartridge holder 56 made of sheet metal or the like, and a sheet metal for driving the cartridge holder 56 to move up and down in the directions of arrows g and h by parallel movement between the unloading position and the loading position. A cartridge loading mechanism 58 having a slide plate 57 constituted by the above is incorporated. A pair of upper and lower magnetic heads 10 configured as a flying head as described later is provided on the upper portion of the chassis 41 on the rear end side opposite to the front panel 44 side.
A linear actuator 103 for transferring the first and the second 102 is incorporated. Incidentally, on the scanning center P ₂ is a scanning position for R / W gap of the spindle motor 51 and the pair of upper and lower magnetic heads 101, 102 for recording and / or reproducing data to the floppy disk 1 (seek and tracking positions) Are located. A motor board 59 is provided below the chassis 41.
A plurality of circuit boards such as a main board 60 and a switch board 61 are screwed horizontally, and an interface board 63 on which an external interface 62 is mounted is screwed horizontally at the rear end of the chassis 41. Then, in the upper part of the chassis 41, the cartridge holder 5
A pair of left and right positioning reference pins 64 and a height reference pin 65 are vertically attached to the lower positions of the four corners of 6, and the reference pin 64 also serves as a height reference pin. Then, a cartridge insertion detection switch 66 including a push switch mounted on the upper part of the switch substrate 61,
Erroneous erase prevention detection switch 67, small capacity detection switch 6
8 and a large-capacity detection switch 69 penetrate the chassis 41 and the slide plate 57 and are exposed at a lower portion of the cartridge holder 56. Note that the eject button 48
The eject switch 70 to be N is mounted on the lower surface of the front end (the end on the front panel 44 side) of the switch board 61.

The chassis 41 has a horizontal bottom plate portion 41a.
And left and right side plate portions 41b vertically raised upward from both left and right sides thereof.
Is the bottom plate portion 41a of the chassis 41 by the motor substrate 59.
Is screwed to the lower portion of the housing through a total of three spacers. The disk table 53 mounted on the upper portion of the spindle motor 51 passes through an opening 72 formed in the bottom plate portion 41a and protrudes above the bottom plate portion 41a. The cartridge holder 56 has a horizontal top plate portion 56a, left and right side plate portions 56b vertically lowered from both left and right sides thereof, and left and right side plate portions 56b.
b, a pair of left and right bottom plate portions 56c that are horizontally turned inward from the lower end of the b. are formed in a generally flat U-shape as a whole, and a large capacity floppy disk cartridge HFDC or a small capacity floppy disk cartridge FDC Arrow a in this cartridge holder 56,
It is configured so that it can be selectively taken in and out horizontally from the direction b. A head insertion opening 73 is cut out at the center of the rear end of the top plate portion 56a of the cartridge holder 56 opposite to the front panel 44 side. The slide plate 57 also has a horizontal bottom plate portion 57a, like the chassis 41, and left and right side plate portions 57b vertically raised from both left and right sides of the bottom plate portion 57a. The slide plate 57 is slidably engaged with a total of four reference pins 64 and a height reference pin 65 by a total of four guide grooves 74 formed in the bottom plate portion 57b. arrow a, and is configured slidably in the direction b between the unloading position P ₁₁ and the loading position P ₁₂ in 41 of the bottom plate portion 41a on.

Then, the cartridge loading mechanism 5
Reference numeral 8 denotes left and right side plate portions 56b of the cartridge holder 56.
A total of four guide pins 75 formed by drawing or the like on the front and rear ends of the
b, and a total of four inclined guide grooves 76 in which a total of four guide pins 75 are slidably engaged with the left and right plates integrally formed at substantially the center of the left and right side plates 56b of the cartridge holder 56 in the front-rear direction. A pair of guide projections 77
Formed on the left and right side plate portions 41b of the chassis 41,
Arrows g and h in which the pair of left and right guide projections 77 are in the vertical direction.
And a pair of left and right vertical guide grooves 78 slidably engaged in the directions. The slide plate 5
Numeral 7 is slid in the forward direction of arrow b by a tension coil spring 79, which is slide urging means attached to the chassis 41, and is located at the rear end side of the chassis 41 (opposite the front panel 44). , Its bottom plate 4
An ejection motor 80 constituted by a geared motor is attached to one side on 1a. An eject cam pin 82 having an eject drive pin 81 formed at an eccentric position is attached to the eject motor 80 and extends rearward from the rear end of one side plate portion 57b of the slide plate 57. The eject arm 81 is driven by an eject drive pin 81. At the front position (position on the front panel 44 side) of the eject motor 80 on the bottom plate portion 41a of the chassis 41, a trigger lever 84 also serving as a shutter opening / closing lever is shown by a solid line in FIG. It is rotatably mounted in the directions indicated by arrows i and j between the locked position and the unlocked position indicated by the alternate long and short dash line, and is rotationally urged in the direction indicated by arrow i to the locked position by rotation urging means (not shown). ing. And this trigger lever 8
4 is configured to lock and unlock the locked portion 86 formed on the slide plate 57.

[0032] Then, according to the cartridge loading mechanism 58, the unloading state, as shown in FIGS. 28 and 30, the arrows against the coil spring 79 the slide plate 57 is pull up to the rear of the unloading position P ₁₁ a The locked portion 8 is slid in the
6 is locked by the trigger lever 84 engaged with the cartridge 6, and a total of four guide pins 75 of the cartridge holder 56 are pushed up in an arrow h direction upward by a total of four inclined guide grooves 78 of the slide plate 57, while guiding the pair of right and left guide projections 77 in a pair of right and left vertical guide grooves 78, are driven upward by parallel motion of the cartridge holder 56 to the unloading position P ₁₃ is a raised position of the cartridge insertion opening 46 of the same height . When the trigger lever 84 is rotated in the direction of arrow j from the lock position shown by the solid line in FIG. 28 to the unlock position shown by the dashed line, the lock of the slide plate 57 by the trigger lever 84 is released, and this slide is performed. plate 57 is slid in the arrow b direction by the tension coil springs 79 from the unloading position P ₁₁ shown in FIG. 30 to the front of the loading position P _12, the slide plate 5
7, a total of four inclined guide grooves 78 push down a total of four guide pins 75 of the cartridge holder 56 in the downward direction of the arrow g, and a pair of left and right guide projections 7.
While guiding the 7 in a pair of right and left vertical guide grooves 78, arrow g cartridge holder 56 to the loading position P ₁₄ shown in (A) of FIG. 31 is a set lowered position below the unloading position P ₁₃ by a solid line It is driven downward by parallel movement in the direction. At this time, as shown in FIG. 28, the slide plate 57 is driven at a low speed by a damping action of a damper 88 which is mounted on the bottom plate portion 41a of the chassis 41 and is engaged with a rack 87 formed on the slide plate 57. , The cartridge holder 56 is configured to be gently driven down from the unloading position to the loading position.

At the time of ejection, the ejection drive pin 81 is driven by the ejection cam disc 82 of the ejection motor 80 to rotate one turn in the direction of the arrow O at the position shown in FIG. Then, the eject drive pin 81 hooks the eject arm 83 of the slide plate 57 as shown in FIGS. 31B and 31C, and the slide plate 57 is unloaded at the unloading position against the tension coil spring 79. loading from P ₁₂ behind the position P ₁₁
To the loading position P shown in FIG.
₁₄ is driven upward in the direction of arrow h by parallel movement to the unloading position P ₁₃ shown in FIG. 30, the trigger lever 84 to the locked position 84 shown by the solid line from the unlocked position indicated by the chain line in FIG. 28 in the direction of arrow i and it is configured to slide plate 57 is automatically locked again in its unloading position P ₁₃ by the trigger lever 84 to be automatically restored. As shown in FIG. 27, a cartridge mis-insertion prevention lever 89 is attached to one side of the rear end side of the top plate portion 56a of the cartridge holder 56 so as to be rotatable around the fulcrum pin 90 in the directions of arrows k and m. The cartridge erroneous insertion prevention lever 89 is rotationally urged in the direction of arrow k by a tension coil spring 91 as rotation urging means attached between the lever 89 and the top plate 56a. Further, a pair of left and right cartridge press-fit springs 92 made of a leaf spring or the like is attached to both left and right positions of the top plate portion 56a of the cartridge holder 56. The large-capacity floppy disk drive HFDD configured as described above is configured to be attached to an internal chassis of a computer device or the like by the lower cover 43, and the entire chassis 41 is provided under the four insulators 93 in total. The large-capacity floppy disk drive HFDD is elastically supported on the upper portion of the cover 43 to realize vibration resistance against external vibrations and the like.

The large-capacity floppy disk drive HFDD is constructed as described above. The large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC are selectively inserted from the cartridge insertion port 46 for loading. The data is selectively recorded and / or reproduced on the large-capacity floppy disk HFD and the small-capacity FD. That is, FIG. 27, as shown by the one-dot chain line in FIGS. 28 and 30, and from the high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC of the cartridge insertion opening 46 is raised to the unloading position P ₁₃ When the cartridge 5 is horizontally inserted in the direction of arrow a in the direction of arrow a, the trigger lever 84 is rotated in the direction of arrow j from the locked position to the unlocked position on the front end face 5a of the cartridge 5, and during this time, the trigger lever 84 Is opened against the shutter spring. Then, the trigger lever 84 is moved to the unlock position by the arrow j.
The moment which is rotated in a direction, downward in the direction of arrow g from the high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC is unloading position P ₁₃ of the cartridge holder 56 to the loading position P ₁₄ shown in FIG. 31 Driven,
These large capacity floppy disk cartridges HF
DC or small capacity floppy disk cartridge FD
C is horizontally loaded to the loading position P _14.

When the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is correctly inserted from the cartridge insertion slot 46, the cartridge wrong insertion prevention lever 89 is relatively inserted into these wrong insertion prevention grooves 20. Or the large-capacity floppy disk cartridge H
FDC and small capacity floppy disk cartridge FD
C can be inserted. On the other hand, when the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is erroneously inserted from the cartridge insertion port 46 (that is, inserted in an upside-down or front-to-back reversed direction), the cartridge is erroneously inserted. The insertion preventing lever 89 can inhibit the insertion of the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC.

[0036] Then, the high capacity floppy disk cartridge H loaded on the loading position P ₁₄
FDC or small capacity floppy disk cartridge F
The DC is horizontally pressed and positioned on a total of four reference pins 64 and a height reference pin 65 by a pair of left and right cartridge pressing springs 93. The cartridge insertion detection switch 66 detects the loading completion state, and Whether the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is protected from erroneous erasure or the recording capacity of the large-capacity floppy disk HFD or the small-capacity floppy disk FD is determined by the erroneous erasure detection switch 67 or the large-capacity detection switch. 69 or the small capacity detection switch 68. Then, when the cartridge insertion detection switch 66 is turned on, the spindle motor 51 is once turned to 3600 rpm.
m or more, and these large-capacity floppy disk HFD or small-capacity floppy disk F
D center core 2 is inserted into the center core hole 6 of the cartridge 5 from below.
4, the center hole 2 a of the center core 2 is fitted to the spindle 52, and the rotation drive pin fitting holes 2 b are fitted to the rotation drive pins 25. When the large-capacity floppy disk cartridge HFDC is loaded, it is detected by the large-capacity detection switch 69 and the spindle motor 51 is detected.
Drives the large-capacity floppy disk HFD at a high speed of 3600 rpm or more, and when the small-capacity floppy disk cartridge FDC is loaded, it is detected by the small-capacity detecting switch 68 and the rotational speed of the spindle motor 51 is 200 to 250 rpm. To drive the small-capacity floppy disk FD. The arrow a along the pair of upper and lower magnetic heads 101, 102 to the scanning center P ₂ by a linear actuator 103, while seeking in the direction b, selective data on these high capacity floppy disk HFD or low capacity floppy disk FD Recorded and / or reproduced.

At this time, the small capacity floppy disk FD of the small capacity floppy disk cartridge FDC
The position of the small-capacity floppy disk FD with respect to the pair of upper and lower magnetic heads 101 and 102 is determined by the positioning function based on the engagement relationship between the rotary drive pin 25 and the rotary drive pin fitting hole 2b of the center core 2. (Centering), and the small-capacity floppy disk FD is rotated by the spindle motor 51 at 200 to 250 rpm.
By rotating at a low speed of m, data recording and / or reproduction is performed with the pair of upper and lower magnetic heads 101 and 102 in contact with the upper and lower surfaces of the small-capacity floppy disk FD. On the other hand, the large-capacity floppy disk H of the large-capacity floppy disk cartridge HFDC
Regarding the FD, the rotation driving pin fitting hole 2b of the center core 2 is formed in a large hole, and the rotation driving pin 25
Is loosely fitted in the rotation drive pin fitting hole 2b. Therefore, this large-capacity floppy disk cartridge HF
Regarding the DC large-capacity floppy disk HFD, positioning on the circumference by the tracking servo system (centering) is not performed by the rotation drive pin 25 as in the small-capacity floppy disk cartridge FDC. The large-capacity floppy disk HFD is transferred to the spindle motor 5
By rotating the magnetic heads 101 and 102 at a high speed of 3600 rpm or more, the pair of upper and lower magnetic heads 101 and 102 are floated (flying phenomenon) on the submicron order by air films generated on the upper and lower surfaces of the large-capacity floppy disk HFD. In the contact state, recording and / or reproduction of large-capacity (high-density) data of 100 MB or more is performed.

Then, after recording and / or reproducing data on the large-capacity floppy disk HFD or the small-capacity floppy disk FD, the eject button 4
8, the eject switch 70 is turned on, and the eject drive pin 81 is rotationally driven by the eject cam disc 82 of the eject motor 80 as described above, and the large-capacity floppy disk cartridge HFDC
Or 30 small capacity floppy disk cartridge FDC from the loading position P ₁₄ shown in (A) of FIG. 31
Together are driven upward in the direction of arrow h by the cartridge holder 56 to the unloading position P ₁₂ shown in,
In FIG. 28, the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is inserted from the cartridge insertion port 46 by the trigger lever 84 which is rotated in the direction of the arrow i from the lock release position indicated by the one-dot chain line to the lock position indicated by the solid line. As shown by a dashed line in FIG. 30, the shutter is pushed out in the direction of arrow b, and the shutter is closed by a shutter spring.

(4)... Description of Linear Actuator Next, as shown in FIGS. 32 to 35, a pair of upper and lower magnetic heads 101 and 102 formed in a flying head
Linear actuator 103 is a magnetic head transport mechanism for transporting the arrow a along the scanning center P _2, in the b direction, the pair of left and right coils 104, a closed magnetic circuit with a pair of left and right magnet plates 105 and the yoke 107 formed The voice coil motor 109 includes the magnetic circuit 108 described above. At this time, a pair of upper and lower magnetic heads 101 and 102 are attached to a pair of upper and lower head arms 11 on a carriage 111 formed of a synthetic resin or the like, as described later.
2, 113 are supported. Then, the carriage 111 is an arrow a, b directions slidably by the guide main shaft 114 and the respective thrust bearings 172, 173 on the guide sub-shaft 115 in the bottom plate portion on 41a attached to parallel form and scanning center P ₂ of the chassis 41 It has been engaged, the carriage 111 is configured to freely these guide main shaft 114 and a guide guided by the auxiliary shaft 115 with arrows along the scanning center P ₂ a, b direction to the slide. And this carriage 11
1. A coil receiver 11 integrally formed at right and left sides on a right angle.
A pair of left and right coils 104 are horizontally mounted on the upper part of the base 6 and are bonded by an adhesive 117. On the other hand, a pair of left and right magnetic circuits 108 are horizontal, and a pair of upper and lower yokes 106 and 107 arranged horizontally at a distance from each other in the front-rear length direction are abutted from above and below. Are formed, and the magnet plate 105 is closely bonded to the lower surface of the upper yoke 106 (or the upper surface of the lower yoke) by its own magnetic force. The pair of left and right magnetic circuits 108 are mounted on the scanning center P ₂ parallel to the horizontal shape on the bottom plate 41a of the chassis 41, the scanning center pair of coils 104 arranged in right angles with respect to P ₂ Are inserted into the outer periphery of the lower yoke 107 (or the upper yoke 106) of the pair of left and right magnetic circuits 108 in a non-contact state. The pair of left and right coils 104 is a flexible printed circuit board 1 shown in FIG.
The control circuit 18 is electrically connected to the main board 60 through the control circuit 18 and applies a control current to the pair of left and right coils 104 to generate a propulsive force in the pair of left and right coils 104 by the pair of left and right magnetic circuits 108. , Carriage 111
Is transported along the guide main shaft 114 and the guide sub shaft 115 in the directions of arrows a and b (seek and tracking). The pair of upper and lower yokes 106 and 107 of the pair of left and right magnetic circuits 108 are provided on the bottom plate portion 41a of the chassis 41 with one yoke pressing plate 147 and a total of four screws 154.
A pair of left and right yoke mounts 14 screwed by a
2.

(5)... Description of the device for mounting the guide spindle Next, as shown in FIGS.
The guide spindle mounting device 121 for mounting the guide spindle on the chassis 41 first forms a small-diameter tapered shaft section 122 at the front end 114a, which is one end of the guide spindle 114, in the same axial center state, and the rear end 114b of the other end. A chamfered portion 123 is formed on the outer periphery. Then, the guide spindle 114
At the front end fixed position, the scanning center P ₂ is vertically cut and raised from the bottom plate portion 41a of the chassis 41.
Is formed at a right angle to the guide main shaft receiving hole 12 into which the tapered shaft portion 122 of the guide main shaft 114 is inserted.
5 are formed. In addition, this guide main bearing hole 12
Reference numeral 5 is formed to have a diameter intermediate between the minimum diameter and the maximum diameter of the tapered shaft portion 122. After a sidewall disposed in right angles from the rear end of the bottom plate portion 41a is raised to a vertical shape upwardly relative scanning center f P ₂ of the chassis 41 at the rear end fixed position of the guide main shaft 114 Side plate 4
1c is disposed in the rear side plate portion 41c, and the guide main bearing groove 1 cut vertically downward from the upper end thereof.
26 is formed, and a V-shaped tapered surface 127 is formed at the lower end of the guide main bearing groove 127. Then, the rear surface of the rear side plate portion 41c (the front panel 44)
A leaf spring 128 is detachably attached to the surface opposite to the side by a pair of left and right positioning dowels 130 and one or more screws 131 so as to be detachable from the rear.
28, the center P ₁₁₄ of the guide spindle ₁₁₄
The pressing piece 129 which is inclined at an angle θ ₁ with respect to is formed integrally.

Then, the guide spindle 114 is connected to the chassis 41.
When attached to the parallel horizontal condition and scanning center P ₂ on the top, as shown in FIG. 36, the guide main shaft 114
Of the guide spindle 114 is inserted into the guide spindle receiving hole 125 from the direction of arrow n.
After the 4b is inserted into the guide main bearing groove 126 from the direction of arrow o, the leaf spring 128 is fitted from the back side to the pair of left and right dowels 130 of the rear plate portion 41c of the chassis 41 by the pair of left and right dowel holes 132 for positioning. The pair of left and right screws 131 inserted from the rear into the pair of left and right screw insertion holes 133 of the leaf spring 128 is attached to the pair of left and right screw stopper holes 134 formed in the rear plate portion 41c. The leaf spring 128 is screwed to the rear surface of the rear plate portion 41c from the direction of arrow n. Then, the leaf spring 12
Pressing piece 129 of 8 is pressed against the elasticity of the arrow p direction is tilted direction chamfered portion 123 relative to the axis P ₁₁₄ of the rear end 114a of the guide main shaft 114, the chamfered portion of the guide main shaft 114 Arrow p on 123
Direction pressing force _Fp is applied. And the pressing force F
the guide main shaft 114 by the horizontal component force F _n of _p is pressed in the arrow n direction, which is the axial direction, the guide main shaft 1
14 is pressed into the guide main bearing hole 125 by a wedge action, and the pressing force F _p
The guide main shaft 114 by the vertical component force F _o of being pressed in the arrow o direction is a direction perpendicular to the axial direction,
The rear end 114b of the guide main shaft 114 is pressed into the tapered surface 127 of the guide main bearing groove 126 by a wedge action, and the guide main shaft 114 is fixed on the chassis 41. Then, so that the parallelism of the guide main shaft 114 for scanning center P ₂ by automatic alignment operation by the tapered shaft portion 122 and the tapered surface 127 is set with high accuracy.

According to the guide spindle mounting device 121 configured as described above, one leaf spring 128 which is a single component having the pressing piece 129 is attached to the rear plate portion 41 of the chassis 41.
The guide spindle 114 can be mounted on the chassis 41 with high precision and extremely easily by the small number of parts and the small number of assembling steps that are only required to be screwed with one or a plurality of screws 131 on the back surface of the rear surface c. Cost reduction and productivity can be significantly improved. The guide counter shaft 11
Numeral 5 is installed horizontally between the lower ends of one yoke mount 142.

(6) Description of the head assembly Next, as shown in FIGS. 9, 10, and 37 to 39,
The carriage 111 of the head assembly 110 is formed of a rigid member made of a light metal such as synthetic resin, aluminum, or magnesium, and a pair of upper and lower magnetic heads 101 and 102 formed by a flying head is used to form a pair of upper and lower head arms 112 and 113. Carriage 1 through
11 is attached to the front end. The pair of upper and lower head arms 112 and 113 are arm bases 180 and 181 made of a rigid member made of a light metal such as synthetic resin, aluminum, or magnesium, which are molded parts.
Suspension 18 made of an elastic member such as a leaf spring
2, 183. That is, the suspensions 182, 1
Reference numeral 83 is integrally connected by a screwing method, integral molding by outsert molding, or the like. Then, the suspension 182 of the pair of upper and lower head arms 112 and 113,
A pair of upper and lower head bases 1
84 and 185 are bonded, and a pair of upper and lower magnetic heads 101 and 102 having a chip shape are bonded to upper and lower opposing surfaces of the pair of upper and lower head bases 184 and 185 via a gimbal plate (not shown). The length of the arm bases 180 and 181 in the pair of upper and lower head arms 112 and 113 is
13 is set to a length of 1/3 or more of the total length. Then, as described with reference to FIGS. 30 and 31, the large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC are attached to the large-capacity floppy disk drive HFDD in the directions of arrows u and g and directions h and b. Since there is almost no need to move the lower magnetic head 102 up and down during loading and unloading, the arm base 181 of the lower head arm 113 supporting the lower magnetic head 102 is attached to the carriage 111. It can be integrally molded or fixed with screws or the like. However, a large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk cartridge FDC is attached to the large-capacity floppy disk drive HFDD by arrows a and g and arrows h and b.
When loading and unloading in the direction, the upper magnetic head 101 needs to be moved up and down so as not to interfere with these large-capacity floppy disk cartridge HFDC and small-capacity floppy disk cartridge FDC. Arm base 18 of the upper head arm 112 supporting the base 101
A pair of horizontal fulcrum pins 18 is provided on an upper magnetic head mounting base 186 in which the carriages 0 and 181 are integrally formed with the carriage 111.
7, so as to be rotatable in the directions of arrows e and f, which are vertical directions.

The arm base 180 of the upper head arm 112 connects a pair of left and right fulcrum pins 187 by a torsion coil spring 189 which is a rotation urging means mounted on the upper part of the upper magnetic head mounting base 186 via a spring mounting plate 188. At the center, it is rotationally urged in the direction of arrow f which is the lower side with respect to the upper magnetic head mount 186. On this occasion,
The arm base 180 of the upper head arm 112 is configured to be rotationally urged in the direction of arrow f to a horizontal reference position abutting on a horizontal reference stand 190 integrally formed with the upper magnetic head mount 186. I have. .

A pair of left and right slide arms 191 are integrally formed on both left and right sides of the front end (upper magnetic head 101 side) of the arm base 181 of the upper head arm 112. As shown in FIG. The slide arm 191 is mounted on the top plate 5 of the cartridge holder 56.
Arrow a at the top of the left and right side edges of the head insertion opening 73 cut out along the scanning center P ₂ in the central portion of the rear end side of the 6a, is slidably mounted in the direction b.

Therefore, this large-capacity floppy disk
According to the drive HFDD, a large capacity floppy disk cartridge HFDC and a small capacity floppy disk
The unloading state of the cartridge FDC, when it is raised in the arrow h direction to the unloading position P ₁₃ of the cartridge holder 56 is shown FIG. 26, by the cartridge holder 56 a pair of left and right slide arms 191 of the upper head arm 112 is arrow h 38, the arm base 180 of the upper head arm 112 is connected to the pair of left and right fulcrum pins 18 as shown in FIG.
7, a large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk in which the upper suspension 182 and the upper magnetic head 101 are rotated up and down in the direction of arrow e against the torsion coil spring 189 in the direction of arrows a and b. -It is raised in the direction of arrow f to an upper retreat position which is a high position which does not interfere with the cartridge FDC. Also, the lower magnetic head 102 is set at a low position from the beginning so as not to interfere with the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC.

Next, the high capacity floppy disk cartridge HFDC and low-capacity floppy disk cartridge FDC is loaded completion state, is lowered in the direction of the arrow g to the loading position P ₁₄ of the cartridge holder 56 is shown in FIG. 30, first, As shown in FIG. 39, the lower magnetic head 102 is mounted on a large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk cartridge.
The cartridge FDC is inserted into the lower head insertion hole 7 from below and comes into contact with the lower surfaces of the floppy disks 1. When the cartridge holder 56 is lowered in the direction of the arrow g to the loading position P _14, lowered in the direction of arrow g the cartridge holder 56 to a position lower than the lowermost position of the pair of left and right slide arms 191 of the upper head arm 112 Is done. Then, as shown in FIG. 39, the arm base 180 of the upper head arm 112 is rotated downward in the direction of arrow f by the torsion coil spring 189 around the pair of left and right fulcrum pins 187, and the horizontal reference base of the upper magnetic head mounting base 186 is rotated. 190
It is abutted on and stabilized. That is, at this time, the upper suspension 182 and the upper magnetic head 101 move from the upper retreat position shown in FIG. 38 to the lower position shown in FIG.
Down in the direction. Then, the upper magnetic head 10 is moved by the upper suspension 182 of the upper head arm 112.
1 is a large capacity floppy disk cartridge HFDC
It is configured to be inserted into the upper head insertion hole 7 of the small-capacity floppy disk cartridge FDC from above and to contact the upper surfaces of the floppy disks 1.

According to the head assembly 110 configured as described above, the pair of upper and lower magnetic heads 10
By controlling the height, parallelism, and flatness of the pair of upper and lower suspensions 182 and 183 with respect to the floppy disk 1 with high accuracy when the upper and lower surfaces 1 and 102 are in contact with the upper and lower surfaces of the floppy disk 1, , 183 almost no unstable elements such as twisting and twisting. Therefore, in particular, the floppy disk 1 of the large-capacity floppy disk cartridge HFDC is rotationally driven at a high speed of 3600 rpm or more, and the pair of upper and lower magnetic heads 101 and 102 are levitated from the upper and lower surfaces of the floppy disk 1 by air films. When recording and / or reproducing high-capacity data of 100 MB or more at high density, the pair of upper and lower magnetic heads 101 and 102 are moved to the upper and lower surfaces of the floppy disk 1 by balancing the load of the pair of upper and lower suspensions 182 and 183. The magnetic heads can be levitated at a stable height, and no irregular rolling phenomenon occurs in these magnetic heads 101 and 102. In addition, since the pair of upper and lower magnetic heads 101 and 102 can smoothly follow the slight runout of the floppy disk 1, high-density recording and / or reproduction of data can always be performed stably. it can. The lower head arm 11
3 also has a carriage 111 similar to the upper head arm 112.
It is also possible to freely attach in a vertical direction (arrows e and f directions).

(7)... Description of the rotary head elevating mechanism Next, as shown in FIGS. 1 to 22, this large-capacity floppy disk drive HFDD includes a carriage 111.
And a pair of upper and lower magnetic heads 101 and 102, which are configured as flying heads, are brought into contact with the upper and lower surfaces of a floppy disk 1 which is a disk-shaped recording medium. A rotary head lifting / lowering mechanism 201 for lifting / lowering control between a position and a head unloading position separated vertically from both upper and lower surfaces thereof is incorporated.
The rotating head lifting / lowering mechanism 201 has a structure shown in FIG.
As shown in FIGS. 4 and 25, a front end face which is an outer periphery of the cartridge 5 of the large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC which is selectively and horizontally loaded at the loading position on the chassis 41. It is arranged on the bottom plate portion 41a of the chassis 41 at a position behind the position 5a (position in the direction of arrow a).

Then, the rotary head lifting mechanism 2
Numeral 01 is formed of a sheet metal part or the like, and is mounted on a base plate 202 fixed horizontally on a bottom plate portion 41a of the chassis 41.
Has a pair of upper and lower suspension lifters 203 and 204 formed of sheet metal parts for opening and closing a pair of upper and lower suspensions 182 and 183 of a pair of upper and lower head arms 112 and 113 in the directions of arrows e and f, which are vertical directions. ing. The pair of suspension lifters 203 and 204 are paired with the pair of upper and lower suspensions 18.
Scanning center P ₂ in the longitudinal direction of 2,183
And a pair of suspension lifters 203 and 204, which are substantially parallel to each other from the front and rear directions of arrows a and b, are arranged at a substantially middle portion in the length direction. be attached to the cut caused a vertical shaped attachment portion 202a on the arrow a is vertical opposite directions about a horizontal shaped fulcrum pin 205 that is parallel to configure the scanning center P _2, in the direction B It is rotatably mounted. The pair of suspension lifters 203, 2
Reference numeral 04 intersects substantially in an X-shape with a fulcrum pin 205 as a center.
A pair of upper and lower suspension support portions 203a and 204a formed upside down are formed integrally on one end side of the base member 4. The pair of upper and lower suspension supports 203a and 204a is
The right and left suspensions 182 and 183 of the pair 113 are inserted at right angles from the direction of arrow C into the inside between the upper and lower sides. Accordingly, one suspension lifter 203 is configured as an upper suspension lifter 203 that drives the upper suspension 182 to open and close with its upward suspension support 203a, and the other suspension lifter 204 mounts the lower suspension 183 with its downward suspension support 204a. The lower suspension lifter 204 that is driven to open and close is configured. The pair of suspension lifters 203 and 204 are attached to the mounting portion 202a and the guide portion 20 formed integrally on the opposite side.
2b so as to be stably rotatable in the directions of arrows A and B.

The free ends 203b, 20 which are the other ends of the pair of suspension lifters 203, 204
The side 4b is one side of a pair of upper and lower suspensions 182, 183 and protrudes toward the eject motor 80 shown in FIGS.
4b side, these pair of suspension lifters 203,
A cam mechanism 206 is provided for reversibly driving the shaft 204 in directions indicated by arrows A and B, which are opposite directions up and down, about a fulcrum pin 205. Then, the cam mechanism 206
Are a pair of cam grooves 207 and 208 formed substantially along the center of the free ends 203b and 204b of the pair of suspension lifters 203 and 204;
07, 208, one camshaft 209 commonly inserted
And is constituted by. At this time, the pair of cam grooves 20
7, 208 are a pair of suspension lifters 203, 2
04 have been gently inclined in the vertical directions opposite to each other along the cross direction of the X-type, the cam shaft 209 is arranged for scanning center P ₂ parallel to the horizontal shape. The arrow C is the left-right direction between a closed position P ₂₂ showing the cam shaft 209 in the open position P ₂₁ and 2 shown in FIG. 1, by sliding driving in the D direction, a pair of cam grooves 207, 208 , The pair of suspension lifters 203 and 204 are reversibly driven to rotate in the directions of arrows A and B about the fulcrum pin 205, and the pair of suspension lifters 203 and 204 are driven.
A pair of upper and lower suspension supports 203a, 204a
Are configured to open and close the pair of suspensions 182 and 183 in the directions of arrows A and B from inside of the suspensions against the spring force.

Then, on the upper part of the base plate 202,
A first slider 21 made of a sheet metal part or the like is located at a position opposite to the pair of upper and lower suspensions 182 and 183 with the pair of suspension lifters 203 and 204 interposed therebetween.
1 is arranged horizontally, and the first slider 2
11 are formed in the base plate 2
02 on a pair of slide guides 213
Slidably have been engaged, the first slider 211 is configured to freely slide in the arrow G, H direction is a direction parallel to the scanning center P ₂ on. Then, at the upper part of the base plate 202, the free ends 203b, 20 of the pair of suspension lifters 203, 204
A second slider 215 made of a sheet metal part or the like is horizontally disposed at a lower position on the 4b side, and a pair of long holes 216 formed in the second slider 215 are stamped on the base plate 202. Is slidably engaged with the pair of slide guides 217 thus formed.
Is slidable in the directions of arrows C and D. Then, the second slider 215
The cam mechanism 2 is attached to the vertical mounting portion 215a cut and raised.
A cam shaft 209 is mounted horizontally with cantilever support. Then, at the top of the base plate 202,
The upper and lower two-stage gears 220 and 221 made of a molded part or the like constituting the direction changing means 219 are provided on one support shaft 2 at positions inside the orthogonal portions of the first and second sliders 211 and 215.
22 are rotatably mounted via a first and second sliders 211 and 215.
Two racks 223 and 224 have upper and lower two-stage gears 220,
221. And this direction changing means 2
Reference numeral 19 denotes the second slider 215 that is slid in the direction of arrow C via the rack 223, the second-stage gears 220 and 221 and the rack 224 when the first slider 211 is slid in the direction of arrow G. Also, the first slider 2
When 11 is slid in the direction of arrow H, the rack 22
The first and second sliders 211 and 21 are configured to slide and drive the second slider 215 in the direction of arrow D via the third and second gears 220 and 221 and the rack 224.
5 is configured to convert the sliding direction to a right angle.

Then, the slide plate 57 of the cartridge loading mechanism 58 described above is driven by the ejection drive pin 81 of the ejection cam disc 82 of the ejection motor 80 composed of a geared motor, and the A selective drive mechanism 225 for selectively driving one slider 211 is disposed. The drive system of the slide plate 57 in the selective drive mechanism 225 is shown in FIGS.
Is constituted by the eject drive pin 81 and the eject arm 83 of the slide plate 57 described in
The drive system of the first slider 211 includes an eject drive pin 81 and a transmission arm 226 rotatably attached to the end of the first slider 211 on the arrow H direction side.

The transmission arm 226 is formed of a molded part or the like. The transmission arm 226 is arranged in the directions of arrows G and H, and is located inside the end of the transmission arm 226 on the side of the arrow H. A fulcrum pin 227 integrally formed in a right angle is parallel to the directions of arrows A and B between a pair of left and right transmission arm support portions 228 bent on both sides of the end of the first slider 211 in the direction of arrow G. The transmission arm 226 is rotatably mounted on the fulcrum pin 227 in the directions of arrows I and J, which are vertical directions. The distal end 226a of the transmission arm 226 on the arrow H direction side is configured to be freely movable in and out of the rotation locus of the eject drive pin 81 in the arrow G and H directions. The upper surface 226b of the transmission arm 226 is formed in an arc shape substantially along the rotation locus of the ejection drive pin 81.

The ejection motor 80 is configured to open and drive the pair of suspension lifters 203 and 204 of the rotary head lifting / lowering mechanism 201 in the direction of arrow A via the selective driving mechanism 225 as described later. And the pair of suspension lifters 20
A tension spring 229, which is a rotation urging means for rotating and driving the third and fourth cylinders 204 so as to close in the direction of arrow B, has both ends of a tension coil spring 229 integrally formed inside a tip 226a of a transmission arm 226, and On the arrow G direction side, it is locked along with a spring locking portion 231 mounted on the bottom plate portion 41a of the chassis 41, and is arranged along the arrow G, H directions. Then, as shown in FIG. 15, the transmission arm 226 is rotationally urged in the direction of arrow I about the fulcrum pin 227 by the tensile force of the tension coil spring 224, and the end of the transmission arm 226 on the fulcrum pin 227 side. The small protrusion 232 integrally formed with the first slider 211
Is stopped by being brought into contact with the stopper portion 233 formed in the direction indicated by the arrow I, and at this time, the position of the distal end surface 226a of the transmission arm 226 is substantially vertically regulated.

(8)... Description of the latch mechanism Next, as shown in FIGS. 9 to 13, the rotary head lifting mechanism 201 has a pair of suspension lifters 203 and 204 for supporting a pair of upper and lower suspensions. Part 20
A latch mechanism 235 is provided for latching 3a and 204a in the closed state shown in FIG. The latch mechanism 235 is provided at a position above the end of the base plate 202 on the arrow G side at a position inside the first slider 211 so as to be rotatable. A plunger 237, which is an upwardly-facing plunger solenoid constituting electromagnetic means fixed above, and arrows C and D inside the end of the first slider 211 on the arrow G side.
And a rotating arm control unit 238 protruding substantially perpendicularly in the direction. In addition, the rotating arm 2
36 is a fulcrum pin 23 parallel to the directions of arrows C and D attached to a vertical mounting portion 202c cut and raised on the base plate 202.
9, the rotary arm 236 is rotatably mounted on the base plate 202 in the directions of arrows K and L, which are vertical directions along the directions of arrows H and G.
7 is urged to rotate in the direction of the arrow L, which is the direction in which the suction nozzle 7 is attracted. A movable iron piece 241 for magnetically attracting the plunger 237 is attached to the tip of the rotary arm 36 via a fulcrum pin 242 so as to be rotatable within a certain angle range. When the first slider 211 is slid in the direction of arrow G, the rotation arm control unit 238 of the first slider 211 moves the rotation arm 236 in the direction of arrow K, which is the direction in which the suction from the plunger 237 is released. It is configured to control the rotation.

(9) Description of Carriage Lock Mechanism Next, as shown in FIGS. 9 and 10 to 14, the rotary head lifting mechanism 201 includes a pair of upper and lower magnetic heads 101 and 102. At the time of unloading the head, the carriage 111 is locked with the pair of upper and lower magnetic heads 101 and 102 retracted in the direction of arrow a to the outermost peripheral position of the floppy disk 1, and the pair of upper and lower magnetic heads 10 and 102 are locked.
A carriage lock mechanism 245 that unlocks the carriage 111 at the same time when the head loading of the first and second heads 102 is completed and enables the pair of upper and lower magnetic heads 101 and 102 to seek the floppy disk 1 in the directions of arrows a and b is attached. Have been. The carriage lock mechanism 245 uses a horizontal lock arm 252 made of a molded component or the like.
2 is formed as a carriage control unit, a fulcrum pin 253 is integrally formed vertically on the lower surface of the other end 252b, and further, an interlocking pin 254 is formed on the upper surface of the intermediate portion.
Are integrally formed vertically. The lock arm 252 is disposed horizontally below the eject motor 80 at a position deviated in the direction of the arrow H which is the first slider 211 side, and a fulcrum pin is provided on the bottom plate portion 41 a of the chassis 41. 253, it is rotatably mounted in a horizontal plane in the directions of arrows M and N. An interlocking pin 254 on the upper surface of the intermediate portion of the lock arm 252 is rotatably and slidably engaged in a cam groove 255 formed at the end of the first slider 211 on the arrow G side.
One end 252a of the lock arm 252 is perpendicular to one side of the carriage 111, and the lock arm contact portion 256 protrudes laterally outward from the lower surface of the one coil receiving base 116 that protrudes horizontally. Is configured to be able to come into contact with the arrow M direction.

(10) Description of Operation of Rotating Head Elevating Mechanism Next, the selective driving mechanism 225 having the above-described structure
The operation of the rotary head lifting / lowering mechanism 201 having the latch mechanism 235 and the carriage lock mechanism 251 will be described with respect to a large-capacity floppy disk cartridge HFDC. First, in the cartridge unloading state, the cartridge shown in FIG. The upper head arm 112 of the carriage 111 is moved by the cartridge holder 56 returned to the loading position as shown in FIG.
8, the upper magnetic head 101 and the suspension 182 are pushed up in the direction of arrow A to the raised / retracted position shown in FIG. 6 against the elastic return force. Then, in this cartridge unloading state, as shown in FIG.
Arrow G by a tension coil spring 229 first slider 211 on the base plate 202 to the initial position P ₂₃
It is slid in the direction.

[0059] At this time, as shown in FIG. 10, when it is slidably driven in the arrow G direction to the initial position P ₂₃ by the first slider 211 tension coil spring 229, the interlocking pin 254 of the locking arm 252 of the carriage lock mechanism 251 Is driven in the direction of arrow G by the cam groove 255 of the first slider 211, and the lock arm 252
Is driven to rotate in the direction of arrow M around the fulcrum pin 253 on the chassis 41 to the carriage lock position. Then
One end (tip) 252a of the lock arm 252 is brought into contact with the lock arm contact portion 256 of the carriage 111 of the head assembly 110 from the direction of the arrow M, and the lock arm 252 moves the carriage 111 to the large-capacity floppy disk shown in FIG. to the outermost position corresponding P ₂₇ of the HFD slides driven in the direction of arrow a, the pair of upper and lower magnetic heads 1
01,102 is slid in the direction of arrow a to the outermost position P ₂₈ of the high capacity floppy disk HFD shown in FIGS. 7 and 8, the carriage 111 is the outermost position corresponding P ₂₇
Is locked as it is.

Next, as shown in FIG. 10, when the first slider 211 is slid in the direction of arrow G to the initial position P ₂₃ by the extension coil spring 229 on the base plate 202, the direction is changed via the direction changing means 219. second slider 215 is slidably driven in the arrow C direction to an open position P ₂₅ shown in FIG. 10 and FIG. Then, as shown in FIG. 1, the cam shaft 209 of the cam mechanism 206 is slid in the direction of the arrow C by the second slider 215 to the open position P ₂₁ , and the cam shaft 209 causes the suspension lifters 203 and 204 to rotate. Free end 203
Since the cam grooves 207 and 208 of the b and 204b are driven to open in the direction of arrow A, which is the opening direction upside down, the pair of upper and lower suspension support portions 203a and 204a of the pair of suspension lifters 203 and 204 are on the base plate 202. around a fulcrum pin 205 to the open position P ₂₉ is open drive in the direction of arrow a.

Therefore, as shown in FIG.
In a state where the pair of upper and lower head arms 112 and 113 are slid in the direction of the arrow a with respect to the pair of suspension lifters 203 and 204 integrally with the pair of suspension lifters 203 and 204, a pair of upper and lower suspension supports of the pair of suspension lifters 203 and 204 are provided. parts 203a, 204a are open in the direction of arrow a to an open position P _29. However, at this time, as shown in FIG. 38, since the upper suspension 182 of the upper head arm 112 has been raised in the direction of arrow e to the upper retreat position, the upper suspension 182 is driven to open and close as shown in FIG. also the upper suspension supporting portion 203a of the upper suspension lifter 203 is raised in the direction of arrow a to an open position P _29, no that the upper suspension supporting portion 203a is contacted to the upper suspension 182. However, the lower suspension 18
When the lower suspension supporting portion 204a of the lower suspension lifter 204 is lowered in the direction of arrow A to an open position P ₂₉ for opening and closing the 3, the lower suspension 1
83 is slightly depressed in the direction of arrow e against the spring force, and the arrow is slightly lower than the head load position where the lower magnetic head 102 is in contact with the lower surface of the large capacity floppy disk HFD shown in FIG. It is in a state of being pushed down in the e direction.

In this cartridge unloading state, as described above, the large-capacity floppy disk cartridge HFDC is inserted into the cartridge holder 56 shown in FIG. There is slid in the direction of the arrow b from the unloading position P ₁₁ to the loading position P _12, the cartridge holder 56
High capacity floppy disk cartridge HF
When DC is completed loaded in the direction of arrow g from the unloading position P ₁₃ to the loading position P ₁₄ shown in FIG. 31, next to the spindle motor 51 is ON, with the high capacity floppy disk HFD is driven to rotate at a high speed 3600rpm The upper suspension 182 of the upper head arm 112 and the upper magnetic head 101 are shown in FIG.
Is lowered in the direction of arrow f from the upper retreat position shown in FIG. Then, as shown in FIG.
The upper suspension 182 has an arrow f due to its spring force.
And is brought into contact with the upper suspension support 203 a of the upper suspension lifter 203. Therefore, in this state, the pair of upper and lower magnetic heads 101 and 102 is held at the head unload position vertically separated from the upper and lower surfaces of the floppy disk 1, and the upper and lower pair of magnetic heads 101 and 102 are moved by the cartridge loading operation. There is no danger that the disc 102 will come into contact with the upper and lower surfaces of the floppy disk 1 by shock.

Thereafter, as described later, when a data recording / reproducing command signal is input from the host computer, the eject drive pin 81 of the eject motor 80 is rotated by the rotation center shaft 82a as shown in FIG. is rotated approximately 120 ° such as an arrow O direction from the initial position P ₃₁ shown by the solid line to the head loading position P ₃₂ shown by the dotted line by the ejecting cam disk 82 which is. Incidentally, the eject motor 80 when the eject drive pin 81 reaches the head loading position P ₃₂ is automatically stopped. Then
As shown in FIGS. 15 and 16, the ejection drive pin 81 abuts on the tip 226 a of the transmission arm 226 of the selective drive mechanism 225 from the direction of the arrow O, and pushes the transmission arm 226 against the tension coil spring 229 by the arrow. Press in the H direction. At this time, a rotational component in the direction of arrow I is generated in the transmission arm 226.
2 abuts against the stopper portion 233 of the first slider 211 from the direction of the arrow I, and the rotation of the transmission arm 226 in the direction of the arrow I with respect to the first slider 211 is prevented. The driving force of the eject driving pin 81 rotated in the direction of arrow can be stably received, and the driving force of the eject driving pin 81 in the direction of the arrow O is accurately transferred to the first slider 211 via the fulcrum pin 227 of the transmission arm 226. Is transmitted to Thus, it is driven the first slide in the direction of arrow H slider 211 against the tension coil spring 229 from the initial position P ₂₃ shown in FIG. 10 to the slide position P ₂₄ shown in FIG. Then, when the first slider 211 is slid in the direction of the arrow H to the slide position P ₂₄ , the second slider 215 is moved via the direction changing means 219 in FIG.
And it is slidably driven in the arrow D direction from the open position P ₂₅ shown in FIG. 1 to the closed position P ₂₆ shown in FIG.

Then, a pair of suspension lifters 2
The camshaft 209 is a second open position P ₂₁ shown in FIG. 1 by the slider 215 of the cam mechanism 206 of 03,204
Since the slide drive in the direction of the arrow D to the closed position P ₂₂ shown in FIG. 2, a pair of suspensions lifter 203,20
4 free end portions 203b, 204b, cam grooves 207, 208
Are driven to rotate in the up-down direction in the direction of arrow B, which is the up-down closing direction.
A pair of upper and lower suspension supports 203
a, 204a are the fulcrum pins 20 on the base plate 202.
5 is closed driven from the open position P ₂₉ shown in FIGS. 1 and 7 in the arrow B direction, which is upside down to the closed position P ₃₀ shown in FIGS. 2 and 8 mainly.

[0065] Then, as shown in FIG. 8, upper and lower pair of suspension support portion 203a, so as to follow the closing movement to the closed position P ₃₀ of 204a, the pair of upper and lower suspensions pair of upper and lower head arms 112, 113 182,
183 is naturally closed by the spring force in the direction of the arrow f, which is the opposite direction up and down, and the pair of upper and lower magnetic heads 101,
102 is soft-landed (soft landing) from the head unloading position shown in FIG. 7 to the head loading position shown in FIG. That is, this time, when the cam shaft 209 of the cam mechanism 206 is slidably driven in the arrow D direction from the open position P ₂₁ shown in FIG. 1 to the closed position P ₂₂ shown in FIG. 2, by a pair of cam grooves 207, 208 Since the pair of suspension lifters 203, 204 is driven to rotate at a safe speed in the direction of arrow B about the fulcrum pin 205, the upper and lower suspension support portions 203a, 204a of the pair of suspension lifters 203, 204 are shown in FIG. open from the position P ₂₄ is closed driven at a safe speed in the direction of arrow B to the closed position P ₃₀ shown in FIG. 8, the pair of upper and lower magnetic heads 10
1 and 102 are non-impact soft-landed on the upper and lower surfaces of the floppy disk 1 at a safe speed.

[0066] At this time, as shown in FIG. 8, upper and lower pair of suspension support portion 203a, on the way 204a is closed in the arrow B direction to the closed position P _30, the pair of upper and lower magnetic heads 101, 102 head loading position are head loaded, after the head loading, and a pair of upper and lower suspension supporting portion 203a, 204a has reached the closed position P _30. Therefore, in the head loading completed state, the pair of upper and lower suspension supports 203a and 204a is completely separated in the direction of arrow B inside the pair of upper and lower suspensions 182 and 183, and recording and / or recording of the floppy disk 1 described later. At the time of reproduction, a pair of upper and lower magnetic heads 101,
When the 102 is sought in the directions of the arrows a and b, there is no danger that the pair of upper and lower suspensions 182 and 183 will interfere with the pair of upper and lower suspension supports 203a and 204a.

Then, the first slider 211 is moved to the position shown in FIG.
Once slidably driven in the arrow H direction from the initial position P ₂₃ shown by the slide position P ₂₄ shown in FIG. 9, the arrows interlocking pin 244 of the locking arm 242 of the carriage lock mechanism 241 by the cam grooves 245 of the first slider 211 H
Driven in the direction. Then, the lock arm 242 is driven to rotate around the fulcrum pin 243 from the carriage lock position shown in FIG. 10 to the carriage lock release position shown in FIG. The lock arm contact portion 246 provided on one side is released outside the movement locus in the directions of the arrows a and b. Then, by releasing the carriage lock, the carriage 111 is moved to the linear actuator 10.
3 makes it possible to seek in the directions of the arrows a and b.

On the other hand, the O of the spindle motor 51
Almost simultaneously with N, the plunger 23 of the latch mechanism 235
7 are energized. When the first slider 211 is slidably driven in the arrow H direction from the initial position P ₂₃ shown in FIG. 10 to the slide position P ₂₄ shown in FIG. 9, the rotation arm control unit 2 of the first slider 211
38 is also slid in the direction of arrow H. Then, the rotary arm 236 of the latch mechanism 235 is rotated by the torsion coil spring 240 about the fulcrum pin 239 from the latch release position shown in FIG. 11 to the latch position shown in FIG. Movable iron piece 241
Is automatically attracted to the upper surface of the plunger 237 by magnetic attraction. As a result, the rotating arm 236 is latched at the latch position as it is, and the rotating arm 236 is moved to the first slider 21 via the rotating arm control unit 238.
It will be directly latched to 1 slide position P ₂₄ shown in FIG.

That is, as described above, the first slider 211 that has been slid in the direction of the arrow H by the eject drive pin 81 via the transmission arm 226 is still in force by the tension coil spring 229 to return in the direction of the arrow G. Is energized, but the plunger 23
When the rotary arm 236 of the first slider 211 is pressed in the direction of the arrow H by the rotary arm 236 automatically attracted to the slider 7, the first slider 211 is slid in the direction of the arrow G by the tension coil spring 229. The first slider 211
And it is configured as to be able to latch the slide position P ₂₄ shown in FIG. 9.

[0070] Then, when the first slider 211 is latched by the slide position P ₂₄ shown in FIG. 9, the direction changing means non-slip structure which is constituted by the upper and lower gears 220, 221 and a pair of racks 223 and 224 21
The second slider 215 via a 9 also directly would be latched in the direction of arrow D in the closed position P ₂₆ shown in FIGS. 9 and 2, the cam mechanism 206 in the head lifting mechanism 201
Of the cam shaft 209 is directly latched in the closed position P ₂₂ shown in FIG. 2, a pair of suspensions lifter 203,20
4 upper and lower suspension support portions 203a, 204
a is as safe will be latched in the closed position P ₃₀ is not to be contacted with the pair of upper and lower suspensions 182 and 183.

As described above, the large-capacity floppy disk
With the loading operation of the cartridge HFDC to the loading position, a pair of upper and lower magnetic heads 101, 102
Are brought into contact with the upper and lower surfaces of the large-capacity floppy disk HFD. After the soft landing operation is completed, a current is applied to the voice coil motor 109 of the linear actuator 103 by a command signal from the host computer, and the carriage 111 is moved to the position shown in FIG.
In FIG. 8, the seek drive is performed in the directions of arrows a and b. At this time, since the large-capacity floppy disk HFD in the large-capacity floppy disk cartridge HFDC is driven to rotate at a high speed of 3600 rpm or more by the spindle motor 51, the large-capacity floppy disk HFD is generated on both upper and lower surfaces of the large-capacity floppy disk HFD. A pair of upper and lower magnetic heads 101 and 102 is formed by a pair of upper and lower head arms 112 and 113 by an air film.
The large-capacity floppy disk HFD is floated (flying phenomenon) on both the upper and lower surfaces of the large-capacity floppy disk on the order of submicron against the spring force of 82,183. Then, in a non-contact state by the floating, the upper and lower pair of magnetic heads 101 and 102 seek the large-capacity floppy disk HFD in the directions of arrows a and b, and the large-capacity floppy disk HFD
Large capacity (high density) data of MB or more is recorded and / or reproduced.

At this time, as shown in FIG. 8, a pair of suspension lifters 203 and 20 of the head lifting / lowering mechanism 201 are provided.
4 upper and lower suspension support portions 203a, 204
Since a is securely latched in the closed position P _30, the arrow a, the pair of upper and lower suspensions pair of upper and lower head arms 112, 113 are seeking driven in the direction b of the pair suspension supporting portion 203a, interference 204a And the seek drive can be performed safely.

Next, after recording and / or reproducing of data to high capacity floppy disk HFD, eject the high capacity floppy disk cartridge HFDC from the loading position P ₁₄ shown in FIG. 31 to the unloading position P ₁₃ shown in FIG. 30 28, as described above, FIG.
When the eject switch 48 is turned on by pressing the eject button 48 shown in FIG. 29, first, a current is applied to the voice coil motor 109 of the linear actuator 103 and the carriage 111 of the head assembly 101 is moved.
Arrow a but to the outermost position corresponding P ₂₇ shown in FIG. 10 and FIG. 8
In the direction, and a pair of upper and lower magnetic heads 101,
102 is moved in the direction of arrow a to the outermost peripheral position of the large-capacity floppy disk HFD. Then, thereafter, the power supply to the coil 237a of the plunger 237 of the latch mechanism 235 is cut off, and the magnetic attraction of the movable iron piece 241 at the tip of the rotary arm 236 by the plunger 237 in the head lifting mechanism 211 is released. Then, the latch of the first slider 211 by the rotating arm 236 is released, and the first slider 211 is moved by the tension coil spring 229 via the transmission arm 236 from the sliding position P ₂₄ shown in FIG. 9 to the initial position P shown in FIG. _The slide is returned in the direction of arrow G to ₂₃ . At this time, the first
The rotation arm 236 is moved by the rotation arm control unit 238 integrally with the slider 211 of FIG.
2 is rotated and returned in the direction of arrow K against the torsion coil spring 240 from the latch position shown in FIG. Since the cam groove 245 of the first slider 211 of the carriage lock mechanism 24 slides the interlocking pin 244 of the lock arm 242 in the direction of arrow G, the lock arm 242 is shown around the fulcrum pin 243 in FIG. FIG. 10 from the carriage unlock position
, The one end 242a of the lock arm 242 abuts on the lock arm contact portion 246 of the carriage 111 of the linear actuator 103 from the direction of the arrow M, and the carriage 111 is moved. 10 and the outermost peripheral position P shown in FIG.
Lock to ₂₇ .

On the other hand, when the first slider 211 is slid in the direction of arrow G from the slide position P ₂₄ shown in FIG. 9 to the initial position P ₂₃ shown in FIG.
Second slider 215 is slid back to the direction of arrow C from the closed position P ₂₆ shown in FIGS. 9 and 2 to an open position P ₂₅ shown in FIGS. 10 and 1 through 9. Then, the cam mechanism 2
Arrow C camshaft 209 06 to the suspension an open position P ₂₃ shown in FIG. 1 from the suspension closing position P ₂₄ shown in FIG. 2
The slide is returned in the direction of FIG.
8, a pair of suspension lifters 203, 20
4 are driven to open in the direction of arrow A, which is an opening direction that is upside down, about the fulcrum pin 205, and the pair of upper and lower suspension supports 203a and 204a of the pair of suspension lifters 203 and 204 are moved. fulcrum pin 205 2 and opens driven in an arrow a direction, which is the opening direction of the upside-down from the closed position P ₃₀ to the open position P ₂₉ shown in FIGS. 1 and 7 shown in FIG. 8 mainly. Then, as shown in FIG. 7, the pair of suspension lifters 203, 2
04, a pair of upper and lower suspensions 182, 1 of a pair of upper and lower head arms 112, 113 of the head assembly 110 by the suspension support portions 203a, 204a of the head assembly 110.
83 is spread out in the direction of arrow e, which is the upside down direction, against these spring forces, and a pair of upper and lower magnetic heads 101,
8, from a head load position where both upper and lower surfaces of the large capacity floppy disk HFD are in contact as shown in FIG. 8, to a head load position which is separated from both upper and lower surfaces of the large capacity floppy disk as shown in FIG. The head is unloaded so that it can be spread.

Then, thereafter, as shown in FIG.
1 ejecting the eject drive pin 81 of the cam disc 82 of the geared motor 80 from the initial position P ₃₁ in the direction of the arrow O
It is driven to rotate. Then, as described with reference to FIGS. 31 and 30, by the eject drive pin 81 slide plate 57 of the cartridge loading mechanism 58 is driven slide from the loading position P ₁₂ to the unloading position P _11, the cartridge holder 57 loading position by being raised back to the direction of arrow h to the unloading position P ₁₃ from the P _14, after the high capacity floppy disk cartridge HFDC is raised in the arrow h direction from its loading position P ₁₄ to the unloading position P _13, the cartridge The ink is discharged from the inside of the holder 57 to the outside of the cartridge insertion opening 46 in the direction of arrow b.

Here, as shown in FIGS. 15 to 20, the ejection motor 80 through the selective driving mechanism 225
The operation of selectively driving the slide plate 57 and the first slider 211 will be described. First, as shown in FIG.
The second output pin and is the eject drive pin 81 is initialized to the initial position P _31, as described above, when the disk cartridge eject, 360 ° rotation in the arrow O direction is clockwise from the initial position P ₃₁ It is again stopped at the initial position P ₃₁ is. At the time of head loading mentioned above, this eject drive pin 81 from the initial position P ₃₁ to a head loading position P ₃₂ is rotated approximately 120 ° such as an arrow O direction, and is stopped at that position. And, in the sleep mode described later, after once returned to the direction of arrow P from the head loading position P ₃₂ to the initial position P _31, performs the forward and reverse rotation operations as rotated in the direction of the arrow O to the head loading position P ₃₂ again It is configured as follows.

Next, as shown in FIG. 15, as described above, the large-capacity floppy disk cartridge HFDC
Is loaded to the loading position, and a cartridge insertion detection switch (disc-in switch) 66 shown in FIG.
2 by rotating the, when the head loading, when the eject drive pin 81 is rotated in the direction of the arrow O from the initial position P ₃₁ shown in FIG. 15 to the head loading position P ₃₂ shown in FIG. 16, the eject drive pin 81 Pushes the tip 226a of the transmission arm 226 in the direction of arrow O. Then, the first slider 211 is slid in the direction of arrow H as shown in FIG. 9 via the transmission arm 226, and the above-described head loading is performed. At this time, as shown in FIG. 16, since the small projection 226c of the transmission arm 226 is in contact with the stopper portion 232 of the first slider 211 from the direction of arrow I, the transmission arm 226 is moved in the direction of arrow J. To the first position by the ejection drive pin 81.
Can be reliably slid in the direction of arrow H.

Next, in a sleep mode to be described later, FIG.
In the head loading completion state shown in FIG.
11 is slid in the direction of arrow G to perform the above-described unloading operation.
As shown by an alternate long and short dash line in FIG. Therefore, when to return from the sleep mode (head unloading state) to the head loading state, as shown in FIG. 17, the reverse rotation once the direction of arrow P the eject drive pin 81 from the head loading position P ₃₂ to the initial position P ₃₁ At this time, the ejection drive pin 81 moves the upper surface 226b of the transmission arm 226 by the arrow J.
The transmission arm 226 is rotated in the direction of arrow J against the rotational urging force of the tension coil spring 229 to release the initial position P while rotating in the direction of arrow P while pushing in the direction of arrow P.
Returning to ₃₁ , as shown in FIG.
Just before 1 Return to the initial position P ₃₁ through the direction of the arrow P,
The transmission arm 226 is rotated and returned in the direction of arrow J by the rotational urging force of the extension coil spring 229. Therefore, after this, it is rotated again in the arrow O direction the eject drive pin 81 from the initial position P ₃₁ to a head loading position P _32, FIG. 1
As shown in FIG. 6, the tip 226a of the transmission arm 226 is pushed in the direction of arrow H by the ejection drive pin 81,
The first slider 211 is slid in the direction of arrow H,
Head loading will be performed.

(11) Description of head attitude control mechanism at the time of head loading Next, the head attitude control mechanism 261 as head attitude control means at the time of head loading will be described with reference to FIGS. control mechanism 261, as described above, the upper and lower pair of suspension support portion 203a of the pair of suspensions lifter 203 and 204 of the head lifting mechanism 201, 204a 2 and the open position P ₂₉ shown in FIGS. 1 and 7 to 8 to the closed position P ₃₀ shown by the arrow B
And the upper and lower magnetic heads 101, 10
2 is closed in the direction of arrow f from the head load position shown in FIG. 7 to the head load position shown in FIG. 8 using the spring force of the pair of upper and lower suspensions 182 and 183, and as shown in FIG. When the magnetic heads 101 and 102 are brought into contact with the upper and lower surfaces 1a and 1b of a floppy disk 1 such as a large-capacity floppy disk HFD which is rotated at a high speed of 3600 rpm or more in the direction of arrow E from the direction of arrow f. The end portions 101a, 102a on the downstream side (in the direction of arrow E) and the upstream side (in the direction opposite to arrow E) of the pair of upper and lower magnetic heads 101, 102 in the direction of arrow E, which is the direction of rotation of the floppy disk 1. Of the ends 101b and 102b, the downstream ends 101a and 102a are always the upstream ends 101b and 10b.
2b, the upper and lower surfaces 1a, 1
The head is provided with a head attitude control means for enabling a stable landing attitude to be brought into contact with b in the direction of arrow f, that is, a soft landing.

As shown in FIG. 5, a pair of upper and lower magnetic heads 10 are attached to the upper and lower surfaces 1a and 1b of the floppy disk 1 which is rotated at a high speed during head loading.
If it is possible to take a stable landing posture such that the downstream ends 101a and 102a of the first and the second 102 are soft-landed from the direction of the arrow f before the upstream ends 101b and 102b, at the moment of the landing,
Upper end 1 of a pair of upper and lower magnetic heads 101 and 102
A pair of upper and lower gaps 26 having opening angles with respect to the upper and lower surfaces 1a and 1b of the floppy disk 1 are provided on the sides 01b and 102b.
6 is formed, the airflow flowing at high speed in the direction of arrow E along the upper and lower surfaces 1a and 1b of the floppy disk 1 which is driven to rotate at high speed enters the pair of upper and lower gaps 2266. It can flow in smoothly.
The air flow is generated by a pair of upper and lower magnetic heads 101, 1
02 is smoothly pushed up in the direction of arrow e against the spring force of a pair of upper and lower suspensions 182 and 183, so that the upper and lower magnetic heads 101 and 102 are attached to the upper and lower surfaces of the floppy disk 1. 1
It can be stabilized by floating substantially parallel to sub-micron order with respect to a and 1b.

As a result, a pair of upper and lower magnetic heads 101,
The landing posture at the moment of soft landing the upper and lower surfaces 1a and 1b of the floppy disk 1 from the direction of the arrow f is disturbed, and a pair of upper and lower magnetic heads 101 and 1 are disturbed.
The upstream end portions 101b and 102b of the O.02 come into contact with the upper and lower surfaces 1a and 1b of the floppy disk 1 before the downstream end portions 101a and 102a, so that the air entrainment action as described with reference to FIG. Rolling vibration or the like is induced by the pair of upper and lower suspensions 182 and 183 to cause stick-slip in the pair of upper and lower magnetic heads 101 and 102. As a result, the upper and lower surfaces 1a and 1b of the floppy disk 1 have thin magnetic layers and It is possible to prevent a risk that both the pair of upper and lower magnetic heads 101 and 102 may be damaged.

FIGS. 1 and 2 show a first embodiment of the head attitude control mechanism 261. In this case, a pair of suspension lifters 20 are used.
A pair of upper and lower suspension supports 203
a, a pair of upper and lower suspension offset support portions 262 and 263, which are small projections, are integrally formed on the upper and lower surfaces of the upper and lower surfaces 204a and 204a. The pair of upper and lower suspension offset support portions 262 and 263 is, for example, a vertically symmetrical substantially hemispherical convex portion formed integrally with the upper and lower surfaces of the pair of upper and lower suspension support portions 203a and 204a by stamping or the like. It is configured.

According to the first embodiment of the head attitude control mechanism 261, as shown in FIGS. 1 and 7,
At the time of unloading the head, a pair of upper and lower suspension supports 20 of the pair of suspension lifters 203 and 204 are provided.
3a, 204a is rotated in the direction of arrow A to an open position P _29, the pair of upper and lower suspensions 182 and 183 when opening driving direction of the arrow e to the open position P ₂₉ against its spring force, in Figure 1 As shown in the figure, a pair of upper and lower suspension offset support portions 262 and 263 are arranged in the width direction of the pair of upper and lower suspensions 182 and 183 (the width direction is the downstream direction of the arrow E direction which is the rotation direction of the floppy disk 1 shown in FIG. 5). The center P of the arrow D direction of FIG. 2 and the arrow C direction of FIG. 1 corresponding to the upstream direction).
An offset position P ₄₂ that is offset by a predetermined amount of offset OS in an arrow C direction upstream of a direction E of the floppy disk 1 (hereinafter, simply referred to as a rotation direction E) with respect to the rotation direction ₁₁ of the floppy disk 1. Is driven to open in the direction of arrow A.

As a result, as shown in FIG. 1 and as shown by the dashed line in FIG.
183 in the width direction against the spring force of the suspension 1
Of the two end portions 182a, 182b and 183a, 183b in the width direction of 82, 183, the upstream end portions 182b, 183b in the rotation direction E of the floppy disk 1 are larger than the downstream end portions 182a, 183a.
The upper and lower surfaces 1a, 1b are vertically spaced apart from each other, and the pair of upper and lower suspensions 182, 183 are opened toward the upstream side in the rotation direction E of the floppy disk 1 with respect to a horizontal reference WL parallel to the floppy disk 1. Angle θ
An inclined posture IL having a substantially C-shape having a vertically symmetric shape inclined to ₄₁ is obtained.

Then, as shown in FIGS. 2 and 8, at the time of head loading, a pair of suspension lifters 203,
204, a pair of upper and lower suspension supports 203a,
Closed position P which 04a is shown in FIG. 2 from the open position P ₂₉ shown in FIG. 1
₃₀ to the closed position P ₃₀ by the spring force of the pair of upper and lower suspensions 182 and 183.
When the pair of upper and lower magnetic heads 101 and 102 is soft-landed from the direction of arrow f to the head load position as shown by the solid line in FIG. 5, the pair of upper and lower suspensions 182 and 183 are driven to close. The spring force causes the suspension 182 to be twisted back in the direction of the arrow B in the width direction.
When the opening angle of the inclined posture IL with respect to the horizontal reference WL of 183 decreases from θ ₄₁ to θ ₄₂ , as described above, the downstream ends 101 a and 102 a of the pair of upper and lower magnetic heads 101 and 102 are moved to the upstream side. End portions 101b, 102
b, the upper and lower surfaces 1a, 1b of the floppy disk 1
Can be soft-landed from the direction of arrow f.

FIGS. 3 and 4 show a second embodiment of the head attitude control mechanism 261.
In this case, a pair of suspension lifters 203, 2
04, a pair of upper and lower suspension supports 203a, 203
A pair of upper and lower suspension inclined support portions 264 and 265 are integrally formed on both upper and lower surfaces of 4a. And
According to the second embodiment of the head attitude control mechanism 261, as shown in FIGS. 1 and 7, when the head is unloaded, the pair of upper and lower suspension supports 203a, 204a of the pair of suspension lifters 203, 204 are opened. to the position P ₂₉ is rotated in the arrow a direction, when opened driving direction of the arrow e to the open position P ₂₉ against the spring force of the pair of upper and lower suspensions 182 and 183, in conjunction with FIG. 3, FIG. 5 As shown by the one-dot chain line, the pair of upper and lower suspension tilt supports 264 and 265 support the pair of upper and lower suspensions 182 and 183 in a highly stable state in the above-described tilt posture IL of the opening angle θ ₄₁ against the spring force. can do.

[0087] Then, as shown in FIG. 8, when the head loading, and a pair of upper and lower suspension supporting portion 203a of the pair of suspensions lifter 203 and 204, 204a is a closed position P shown in FIG. 2 from the open position P ₂₉ shown in FIG. 1 Closed in the direction of arrow B until ₃₀ and a pair of upper and lower suspensions 1
82,183 and closing drive in the direction of arrow f to the closed position P ₃₀ by the spring force, as shown by the solid line in FIG. 5, a soft landing of the arrow f direction a pair of upper and lower magnetic heads 101, 102 to the head loading position At this time, the pair of upper and lower suspensions 182 and 183 are twisted back in the width direction B by the spring force,
The opening angle of the inclination posture IL of the pair of upper and lower suspensions 182 and 183 with respect to the horizontal reference WL is from θ ₄₁ to θ.
At the time point when the size of the magnetic heads has decreased to ₄₂ , as described above, the downstream end portions 101a, 101a,
02a can be soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1 in the direction of arrow f before the upstream ends 101b and 102b.

At this time, in particular, the head attitude control mechanism 2
According to the second embodiment 61, as shown in FIG. 5, when the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1, the pair of upper and lower magnetic heads 101 and 102 is used. , 102 until the lower end portions 101a, 102a of the lower end side are brought into contact with the upper and lower surfaces 1a, 1b of the floppy disk 1, as shown in FIG.
265 may have been supported in the high stable state to the inclined attitude IL angle theta ₄₂ opens the pair of upper and lower suspensions 182 and 183. Therefore, as shown by the solid line in FIG. 5, the downstream end portions 101 of the pair of upper and lower magnetic heads 101 and 102 are arranged.
a and 102a are indicated by arrows f on the upper and lower surfaces 1a and 1b of the floppy disk 1 before the upstream ends 101b and 102b.
The operation of soft landing from the direction can always be performed with high accuracy.

The rotary head lifting mechanism 201 according to the present invention has been described above.
Can slide the pair of suspension lifters 203, 204 in the directions of arrows C, D, which are perpendicular to the pair of upper and lower suspensions 182, 183, without moving the pair of suspension lifters 203, 204 on the fulcrum pin 205 on the chassis 41. The pair of upper and lower suspensions 182 and 183 are opened and closed in the directions of arrows A and B by simply rotating (opening and closing) in the directions of arrows A and B, which are the upper and lower directions, with the pair of upper and lower magnetic heads 101 and
102 is configured to be driven up and down between a head loading position and a head unloading position.

Therefore, as compared with the slide type head lifting / lowering mechanism 501 shown in FIGS. 40 to 42, the rotary type head lifting / lowering mechanism 201 has a simple structure and a low cost due to a reduction in the number of parts and assembly steps. Weight and weight can be reduced. Then, this rotary head lifting mechanism 2
01 is not necessary to slide the pair of suspension lifters 203 and 204 in the direction perpendicular to the pair of upper and lower suspensions 182 and 183 unlike the slide type head lifting mechanism 501, and the pair of suspension lifters 203 and 204 are not required. The length of the large-capacity floppy disk cartridge HFDC due to space saving can be greatly promoted, for example, the length of the large-capacity floppy disk cartridge HFDC can be greatly shortened as compared with that of the slide type head lifting mechanism 501.

Further, the rotary type head elevating mechanism 20
1, a pair of suspension lifters 203, 204
Arrows A and B around the fulcrum pin 205 on the chassis 41
The upper and lower suspension support portions 203a and 204a are driven to open and close in the
When the opening / closing drive of the pair 2 and 183 is performed in the directions of the arrows e and f, unlike the head lifting mechanism 501 of the slide type, the relative positions of the pair of the upper and lower suspension supports 203a and 204a with respect to the pair of the upper and lower suspensions 182 and 183 in the directions of the arrows C and D. Since the positional relationship hardly changes (even if the change is very small), the pair of upper and lower suspensions 1
When the 82 and 183 are opened and closed in the directions of arrows e and f, the pair of upper and lower suspensions 182 and 183
No inconvenience such as twisting in the D direction occurs. Accordingly, the pair of upper and lower magnetic heads 101 and 102 can be stably soft-landed from the head unload position to the head load position.

Further, a pair of suspension lifters 20
3 and 204 are simply rotated in the directions of arrows A and B around the fulcrum pin 205 on the chassis 41 without any sliding in the directions of arrows C and D.
This rotary head lifting mechanism 201 for soft landing of the heads 1 and 102 from the head unloading position to the head loading position in the direction of arrow f is different from the sliding head lifting mechanism 501 in that a pair of upper and lower magnetic heads 101 and 102 are provided.
The soft landing speed of 102 can be easily controlled. Therefore, a pair of upper and lower magnetic heads 101, 10
When the magnetic head 2 is soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1 from the direction of arrow f, a pair of upper and lower magnetic heads 101 and 1 are prevented from being generated.
02 at a very slow safe speed, extremely safe,
In addition, soft landing can be stably performed.

(11) Description of operation mode Next, this large-capacity floppy disk drive HFD
The operation mode in D will be described. .

First, in FIG. 9, when the loading of the large-capacity floppy disk cartridge HFDC is completed and the spindle motor 51 is turned on, the first slider 211 is slid in the direction of arrow H by the eject motor 80 via the transmission arm 226. Then, the second slider 215 is slid in the direction of arrow D via the direction changing means 219, and the pair of suspension lifters 203 and 204 of the head lifting / lowering mechanism 201 are moved in the direction of arrow B.
Direction, and a pair of upper and lower suspensions 182,
By 183, the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the floppy disk 1.
At the same time, the first
Is latched, and its head load state is latched.

Next, in FIG. 10, when head unloading is performed after data recording and / or reproduction on the floppy disk 1 is completed, a current flows through the voice coil motor 109 of the linear actuator 103 and the carriage 111 is slid in the direction of the arrow a to the outermost circumferential position corresponding P ₂₇ of the floppy disk 1. Then, the energization of the plunger 237 of the latch mechanism 235 is turned off, and the first slider 211 is slid in the direction of the arrow G by the tension coil spring 229, so that the pair of suspension lifters 203 and 204 of the head lifting mechanism 201 are moved.
Is driven to open, and a pair of upper and lower suspensions 182, 18
A pair of upper and lower magnetic heads 101 and 102 are unloaded above and below the floppy disk 1 via the magnetic disk 3. Further, the lock arm 252 to lock and slide the carriage 111 to the outermost position corresponding P ₂₇ of the floppy disk 1.

Next, when the power is turned off in the head loading state shown in FIG. 9, the power supply to the plunger 237 of the latch mechanism 235 is turned off, as shown in FIG. The carriage 111 is slid in the direction of arrow G, and the carriage 111 is slid in the direction of arrow a by the lock arm 252 to a position P ₂₇ corresponding to the outermost peripheral side of the floppy disk 1. Then, at the timing when the carriage 111 is slid in the direction of arrow a, a pair of suspension lifters 203, 2
04 is opened and a pair of upper and lower suspensions 18 are driven.
A pair of upper and lower magnetic heads 102, 10
3 is head unloaded to the head unload position.

Finally, in the head load state shown in FIG.
The case where the host computer (personal computer) hangs up will be described. If the host computer hangs up in this head loading state, the eject switch becomes ineffective, so that the ejection motor 80 cannot eject the large-capacity floppy disk cartridge HFDC. . Therefore, FIG.
As shown in FIG. 19, a forced ejection operation of manually pushing the slide plate 57 of the cartridge loading mechanism 58 in the direction of arrow a is performed. Then, as shown in FIG. 18, the projection 233 of the slide plate 57 is
And is pushed in the direction of arrow a. At this time, as shown in FIG. 19, the transmission arm 228 rotates in the direction of the arrow J.
The transmission arm 22 cannot rotate any more.
6, the first slider 211 is slid in the directions of the arrows a and G. Then, the rotary arm 236 of the latch mechanism 235 is forcibly rotated in the direction of arrow K in FIG. 11 by the rotary arm control unit 238 of the first slider 211, and the movable iron piece 241 is forcibly peeled off from the plunger 237. . Then, the first slider 211 is slid in the direction of arrow G by the tension coil spring 229, and the pair of upper and lower magnetic heads 101 and 102 is unloaded.

Next, in this large-capacity floppy disk drive HFDD, in order to suppress current consumption and to suppress wear of both the floppy disk 1 and the head chips of the pair of upper and lower magnetic heads 101 and 102, data is recorded and read. At the time other than during reproduction, the head load state is released and the head unload state can be maintained. Therefore, this operation is shown in FIGS.
This will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 21 shows steps from the loading of the large-capacity floppy disk cartridge HFDC to the recording and / or reproduction of the large-capacity floppy disk HFD soft landing.

First, the flowchart shown in FIG. 22 explains the head unload operation after data recording and / or reproduction. When the recording and / or reproduction of the data is completed, a pair of upper and lower magnetic heads 101 , 102 perform a patrol seek (a patrol seek is an operation of moving several tracks every minute). After 3 minutes, commands from the host computer (idle command, standby command, sleep command)
Is sent, the pair of upper and lower magnetic heads 101 and 102 move to the outermost periphery of the floppy disk 1, and the latch mechanism 2
The power supply to the plunger 237 of 35 is once turned off, and the holding of the head loading state of the head lifting / lowering mechanism 201 is released (latched). Then, a pair of upper and lower magnetic heads 101 and 102 is
Is unloaded from the head.

FIG. 23 shows a flowchart at this time. Incidentally, the commands sent from the host computer to release the holding of the head load state of the head lifting mechanism 331 are the above-mentioned three types of the idle command, the standby command, and the sleep command. The modes are also divided into the following three types. Idle command: A mode in which the head is unloaded, but the spindle motor 51 is rotating, and current is supplied to the circuit, and the circuit can be operated by the next command. Standby command: A state in which the head is unloaded and the spindle motor 51 is also stopped. However, a current is supplied to the circuit, and the circuit can be operated by the next command. Sleep mode: The head is unloaded, the spindle motor 51 also stops, and the supply of current to the circuit is turned off.
Mode in which only the reset command is effective. Which command is sent depends on the host computer, but in the case of all commands, the head load is released.

Next, the flow chart shown in FIG. 24 shows that, after recording and / or reproducing data, a patrol seek is not performed for three minutes, and as soon as a command is sent from the host computer, the head loading of the head elevating mechanism 201 is immediately started. In this mode, the holding of the state is released. According to this mode, the wear of the floppy disk 1 and the pair of upper and lower magnetic heads 101 and 102 is further reduced. However, access may be delayed depending on the timing of recording and / or reproducing data again.

Next, the flowchart shown in FIG. 24 shows that when the pair of upper and lower magnetic heads 101 and 102 is unloaded after recording and / or reproducing data, the data is recorded and / or re-recorded again in the disk-in state. In the case of reproducing, when an instruction command for recording and / or reproducing data is sent, as shown in FIG.
0 rotates in the direction of arrow P in the reverse direction, and the ejection drive pin 81
There back direction of the arrow P from the head loading position P ₃₂ to the initial position P _31. Thereafter, the ejection motor 80 rotates forward in the direction of arrow O, and the ejection drive pin 81 is moved to the position shown in FIG.
From the initial position P ₃₁ shown in 0 when it is rotated in the arrow O direction to the head loading position P _32, the first slider 211 is slidably driven in the arrow H direction via the transmission arm 226, the head elevating mechanism 201 Perform head loading operation,
The state is held by the latch mechanism 235.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention. For example, the present invention is not limited to a floppy disk cartridge and a floppy disk drive, but can be applied to various disk drive devices for recording and / or reproducing various disk-shaped recording media.

[0104]

The disk drive device of the present invention configured as described above has the following effects.

According to the first aspect, when the head is moved from the head unload position to the head load position via the suspension by the head lifting / lowering mechanism to make contact with the disk-shaped recording medium, that is, when the head is soft-landed, the head attitude control means is used. The end on the head downstream side in the rotation direction of the disc-shaped recording medium can be brought into contact with the disc-shaped recording medium before the end on the upstream side, so that the air flow on the surface of the disc-shaped recording medium is Since the head can be soft-landed while smoothly flowing into the disk-shaped recording medium,
At the time of the soft landing, it is possible to prevent the occurrence of the stick-slip phenomenon of the head due to the entrainment of the air flow beforehand, and the head can be softly landed on the disk-shaped recording medium very stably. Further, since both the head and the disk-shaped recording medium can be prevented from being damaged due to the occurrence of the stick-slip phenomenon of the head, a high-quality disk drive having high durability and high reliability can be prevented. The device can be realized.

A second aspect of the present invention is a suspension offset support portion provided on a suspension lifter when the head is moved from a head unload position to a head load position via a suspension by a suspension lifter to make a soft landing on a disk-shaped recording medium. By supporting a position offset from the center of the suspension to the upstream side in the rotation direction of the disk-shaped recording medium, the suspension is tilted, and the downstream end of the head in the rotation direction of the disk-shaped recording medium is moved upstream. Soft landing while allowing the air flow on the surface of the disc-shaped recording medium to flow smoothly between the head and the disc-shaped recording medium so that the disc-shaped recording medium can come into contact with To be able to Therefore, despite the simple structure of simply supporting the offset position of the suspension with the suspension offset support section, it prevents the stick-slip phenomenon of the head due to the entrainment of airflow during soft landing. As a result, the head can be softly landed on the disk-shaped recording medium very stably. Further, since both the head and the disk-shaped recording medium can be prevented from being damaged due to the occurrence of the stick-slip phenomenon of the head, a high-quality disk drive having high durability and high reliability can be prevented. The device can be realized.

In the third aspect, when the head is moved from the head unload position to the head load position via the suspension by the suspension lifter via the suspension to make a soft landing on the disk-shaped recording medium, the suspension tilt support portion provided on the suspension lifter. Tilting the suspension to support the suspension, causing the suspension to tilt so that the downstream end of the head in the rotational direction of the disk-shaped recording medium contacts the disk-shaped recording medium before the upstream-side end. The head can be soft-landed while the air flow on the surface of the disk-shaped recording medium flows smoothly between the head and the disk-shaped recording medium. Head tilted until touched The while keeping the high stable condition, performed particularly stable soft landing operation to contact the disk-shaped recording medium end of the head downstream before the end of the upstream side. Therefore, at the time of the soft landing, the stick-slip phenomenon of the head due to the entrainment of the air flow can be prevented from occurring, and the head can be softly landed on the disk-shaped recording medium with high stability. Further, since both the head and the disk-shaped recording medium can be prevented from being damaged due to the occurrence of the stick-slip phenomenon of the head, a high-quality disk drive having high durability and high reliability can be prevented. The device can be realized.

[Brief description of the drawings]

FIG. 1 shows a large capacity floppy disk to which the present invention is applied.
FIG. 2 is a front view illustrating a rotary head elevating mechanism according to an embodiment of the drive, and in particular, is a front view in a suspension open state illustrating a first embodiment of a head attitude control mechanism.

FIG. 2 is a front view of a suspension type closed state illustrating a rotary head elevating mechanism of FIG. 1;

FIG. 3 is a front view illustrating a rotary type head elevating mechanism according to the first embodiment, and particularly a front view of a suspension open state illustrating a second embodiment of a head attitude control mechanism.

FIG. 4 is a front view illustrating the suspension head driving mechanism of FIG. 3 during suspension closing driving.

FIG. 5 is an enlarged front view of a main part for explaining a soft landing operation of a pair of upper and lower heads by a head attitude control mechanism in the rotary head elevating mechanism of the rotating system.

FIG. 6 is a partially cutaway side view of the head retracting state for explaining the operation of the rotary head elevating mechanism of the above.

FIG. 7 is a partially cutaway side view of the head unloading state for explaining the operation of the rotary type head elevating mechanism of the above.

FIG. 8 is a partially cutaway side view of a head loading state for explaining the operation of the rotary type head elevating mechanism according to the first embodiment.

FIG. 9 is a plan view of a head loading state for explaining the entire rotary type head lifting / lowering mechanism.

FIG. 10 is a plan view of a head unloading state for explaining the entire rotary head elevating mechanism of the above.

FIG. 11 is a side view in an unlatched state illustrating a latch mechanism of the rotary type head elevating mechanism according to the first embodiment.

FIG. 12 is a side view of a latch state for explaining the above latch mechanism.

FIG. 13 is a plan view and a side view showing a first slider of the rotary head elevating mechanism of the above.

14A and 14B are a plan view and a side view showing a lock arm of the rotary head elevating mechanism of the rotating system.

FIG. 15 is a side view at the time of head unloading illustrating a selective drive mechanism of the rotary type head elevating mechanism according to the first embodiment.

FIG. 16 is a side view for explaining a head loading operation for explaining the selective drive mechanism according to the embodiment.

FIG. 17 is a side view for explaining a head unload operation for explaining the selective drive mechanism of the above.

FIG. 18 is a side view illustrating a state before the ejection of the selective drive mechanism and the cartridge loading mechanism is started.

FIG. 19 is a side view illustrating an ejecting operation of the selective driving mechanism and the cartridge loading mechanism according to the embodiment.

FIG. 20 is a side view illustrating an operation position of an ejection drive pin of an ejection motor of the above selective drive mechanism.

FIG. 21 is a flowchart for explaining a head load when the first disk is inserted into the large-capacity floppy disk drive.

FIG. 22 is a flowchart of performing a head unload operation after performing patrol seek for three minutes after data recording and / or reproduction.

FIG. 23 is a flowchart for performing head unloading without performing patrol seek for three minutes after data recording and / or reproduction.

FIG. 24 is a flowchart illustrating an operation when recording and / or reproducing data in a standby state in a disc-in state.

FIG. 25 is an external perspective view of a large-capacity floppy disk drive to which the present invention is applied.

FIG. 26 is a perspective view of the drive in which the upper and lower covers and the front panel of the drive are disassembled.

FIG. 27 is a plan view of the same drive with an upper cover removed.

FIG. 28 is a plan view of the same drive with a cartridge holder removed.

FIG. 29 is a bottom view of the same drive with the lower cover removed.

FIG. 30 is a side view showing an unloading state in the cartridge loading mechanism of the drive of the above.

FIG. 31 is a side view showing a loading state in the cartridge loading mechanism of the drive of the above.

FIG. 32 is a plan view illustrating a linear actuator of the above drive.

FIG. 33 is a cross-sectional view taken along the line AA of FIG. 32;

FIG. 34 is a plan view as viewed in the direction of arrows BB in FIG. 33.

FIG. 35 is a cross-sectional view taken along the line CC of FIG. 34;

FIG. 36 is an exploded perspective view of the guide spindle mounting device.

FIG. 37 is a perspective view illustrating a head assembly.

FIG. 38 is a side view illustrating the insertion and removal of a cartridge between upper and lower magnetic heads.

FIG. 39 is a side view for explaining recording and reproduction of the cartridge inserted between the upper and lower magnetic heads.

FIG. 40 is a front view illustrating a slide-type head elevating mechanism developed by the inventor of the present invention.

FIG. 41 is a front view for explaining the operation of the above-mentioned slide type head elevating mechanism.

FIG. 42 is an enlarged front view for explaining a problem at the time of soft landing of the head by the slide type head elevating mechanism of the above.

FIG. 43 is a perspective view of a large-capacity floppy disk cartridge.

FIG. 44 is a plan view of FIG. 43.

FIG. 45 is a bottom view of FIG. 44.

FIG. 46 is a perspective view of a conventional small capacity floppy disk cartridge.

FIG. 47 is an exploded perspective view of FIG. 46.

FIG. 48 is a plan view of FIG. 46.

FIG. 49 is a bottom view of FIG. 46.

50 is a sectional view of FIG. 46.

FIG. 51 is a cross-sectional view illustrating a conventional small-capacity floppy disk drive.

[Explanation of symbols]

Reference numeral 1 denotes a floppy disk which is a disk-shaped recording medium;
01 and 102 are magnetic heads, 111 is a carriage, 182 and 183 are suspensions, 201 is a rotary head lifting / lowering mechanism, 203 and 204 are suspension lifters, 203a and 204a are suspension supports, and 261 is a head attitude control means. 262 and 263 are suspension offset support portions, and 264 and 265 are suspension inclination support portions.

[Procedure amendment]

[Submission date] March 6, 2000 (200.3.6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004] their in this, as shown in FIG. 51, in the conventional small-capacity floppy disk drive FDD, and insert the small-capacity floppy disk cartridge FDC into the cartridge holder, lock release of the cartridge holder by the trigger lever Then, the small-capacity floppy disk cartridge FDC is loaded at a high speed from the unloading position, which is the ascending position, to the loading position, which is the descending position, by using the cartridge holder, and the floppy disk 1 is moved to the disk table 2.
At the same time as chucking on the magnetic disk 3, a pair of upper and lower magnetic heads 28 and 29 are impactedly landed (installed) on both upper and lower surfaces of the floppy disk 1. However, since the magnetic layer of the floppy disk 1 of the small-capacity floppy disk cartridge FDC is extremely thick, the pair of upper and lower magnetic heads 28 and 29 impacts on the upper and lower surfaces of the floppy disk 1 with impact. Even if it is done, there is no worry that the magnetic layer will be seriously damaged,
There were no particular safety issues. However, the recording capacity of the large-capacity floppy disk cartridge HFDC is 100
Since the thickness of the magnetic layer of the floppy disk 1 increased to more than MB is extremely thin, the pair of upper and lower magnetic heads 28 and 29 impacts on the upper and lower surfaces of the floppy disk 1 at the time of loading. In such a case, the magnetic layer having a small thickness is seriously damaged, which causes a great problem in quality and durability.

Claims (3)

[Claims] 1. A head supported by a carriage via a suspension between a head load position at which data can be recorded and reproduced on a disk-shaped recording medium and a head unload position at which data recording and reproduction cannot be performed. In a disk drive device provided with a head lifting mechanism that moves up and down, when the head is moved from a head unload position to a head loading position and brought into contact with the disk-shaped recording medium, the head in the rotation direction of the disk-shaped recording medium is A head attitude control means for bringing the downstream end of the downstream end and the upstream end of the head into contact with the disc-shaped recording medium prior to the upstream end. Characterized disk drive device. 2. A head supported by a carriage via a suspension between a head load position at which data can be recorded and reproduced on a disk-shaped recording medium and a head unload position at which data recording and reproduction cannot be performed. A disk drive device having a head elevating mechanism for elevating and lowering, wherein the head is disposed substantially orthogonal to the length direction of the suspension, and the head is moved between a head loading position and a head unloading position via the suspension. When the head is moved from the head unload position to the head load position via the suspension by the suspension lifter, the suspension lifter is driven downstream of the head in the rotational direction of the disk-shaped recording medium. The disc ends before the upstream end A suspension offset support portion provided on the suspension lifter supports a position offset from a center of the suspension to an upstream side in a rotation direction of the disk-shaped recording medium so as to be in contact with the recording medium. Disk drive device. 3. A head supported by a carriage via a suspension between a head load position at which data can be recorded and reproduced on a disk-shaped recording medium and a head unload position at which data recording and reproduction cannot be performed. A disk drive device having a head elevating mechanism for elevating and lowering, wherein the head is disposed substantially orthogonal to the length direction of the suspension, and the head is moved between a head loading position and a head unloading position via the suspension. When the head is moved from the head unload position to the head load position via the suspension by the suspension lifter, the suspension lifter is driven downstream of the head in the rotational direction of the disk-shaped recording medium. The disc ends before the upstream end As contact with the recording medium, the disk drive apparatus is characterized in that is supported by tilting the suspension in the suspension inclined support portion provided on the suspension lifter.