JP2000030426A - Disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a magnetic head to a desired data track even when a low order floppy disk having no position information regarding data tracks is used. SOLUTION: This disk driving device is provided with a head for recording and/or reproducing a disk recording medium, a carriage having the head mounted thereon, an actuator 103 for transferring the carriage along a guide main axis 114, a coil receiving base 116 for supporting the coil 104 of a linear actuator 103, and a flexible printed circuit board 118 for connecting a printed circuit board attached to the coil 104 supported on the coil receiving base 116 and a chassis 41. The coil receiving base 116 includes a flexible printed circuit board holding part 191 integrally formed for holding the flexible printed circuit board 118 folded roughly perpendicularly along the outer side face of the coil 104 in a state along the outer side face of the coil 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive apparatus in which a carriage mounted on a magnetic head for recording and / or reproducing data on a disk-shaped recording medium is driven by a linear actuator.

[0002]

2. Description of the Related Art A disk-shaped recording medium such as a flexible disk has a recording capacity of about 1.
What is assumed to be 44 megabytes (small capacity floppy disk cartridge FDC) is widely used.
And the small capacity floppy disk cartridge F
As shown in FIG. 37, a lower-order disk drive device for recording / reproducing information signals on / from a CD includes a head 301 for recording / reproducing information signals and a head 301 for recording / reproducing the information signals.
And a carriage 302 on which the
And a light detecting device 305 for detecting the position of the head 301 are known. The actuator 304 includes a stepping motor 306, a lead screw 307, and a lead 308. When the lead screw 307 is rotated by the stepping motor 306, the rotation of the lead screw 307 causes the lead 302 to move the carriage 302 straight. It is to be converted into exercise.

A large-capacity floppy disk cartridge HFDC has been developed in which the recording capacity of the small-capacity floppy disk cartridge FDC is increased to 100 MB or more, preferably 300 to 700 MB.

The large-capacity floppy disk cartridge HFDC is a so-called backward compatible large-capacity floppy disk drive HF that can also use the small-capacity floppy disk cartridge FDC.
Recording and reproduction are performed by the DD.

As the large-capacity floppy disk drive HFDD, a voice coil motor (VC) is used as an actuator 304 for moving the carriage 302.
M) is known.

[0006]

By the way, as described above, the actuator 3 for moving the carriage 302 is used.
In the disk drive device using a voice coil motor (VCM) as 04, there was a problem that the processing of the flexible printed circuit board for supplying power from the chassis to the coil of the voice coil motor was troublesome.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a disk drive device capable of easily processing the flexible printed circuit board.

[0008]

According to the present invention, there is provided a head for recording and / or reproducing a disk-shaped recording medium, a carriage on which the head is mounted, and a carriage mounted along the radial direction of the disk-shaped recording medium. A disk drive device comprising: an actuator to be transferred; a pedestal supporting a coil of the linear actuator; and a flexible printed circuit board connecting the coil supported on the coil pedestal and a printed circuit board mounted on a chassis. A flexible printed circuit board holding portion for holding the flexible printed circuit board bent at a substantially right angle along the outer surface of the coil along the outer surface of the coil along the outer surface of the coil; This reduces the number of parts and allows the flexible printed circuit board holder to be mounted on the coil holder. It was it possible to reduce the number of the bonding (mounting) process.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case where the disk drive of the present invention is applied to a large-capacity floppy disk drive used for a large-capacity floppy disk cartridge having a larger storage capacity than a current small-capacity floppy disk cartridge will be described. For example, the following description will be made in comparison with the current small-capacity floppy disk cartridge and the small-capacity floppy disk drive.

(1) Description of small-capacity floppy disk cartridge and small-capacity floppy disk drive (2) Description of large-capacity floppy disk cartridge (3) General description of large-capacity floppy disk drive (4) ... Description of linear actuator (5) ... Explanation of guide spindle mounting device (6) ... Explanation of guide sub shaft and yoke mounting device (7) ... Description of bearing device for guide main shaft and guide counter shaft (8) ... Head Description of assembly (9) Photodetector (1) Description of small-capacity floppy disk cartridge and small-capacity floppy disk drive First, as shown in FIGS. A floppy disk 1 made of a magnetic sheet is brought into contact with the outer periphery of a center core 2 which is a disk made of a stainless steel plate. A small-capacity floppy disk cartridge FDC using a small-capacity floppy disk with a mounted structure 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 constitutes a flat and substantially rectangular cartridge 5 by upper and lower shells 3 and 4 formed of 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 a center core hole 6 (see FIG. 32) formed at the center of the lower shell 4, and a small cartridge 5 described later of the cartridge a indicated by an arrow a. capacity floppy HONORS between the front end surface 5a and the center core hole 6 is an end of the insertion direction side into the drive, elongated hole-shaped pair of upper and lower heads along the cartridge center P ₁ is the upper and lower shells 3 and 4 An insertion hole 7 is formed. In order to open and close the pair of upper and lower head insertion holes 7, as shown in FIG. 32, a pair of upper and lower horizontal plate portions 8a and 8b and a front end vertical plate portion 8c form a U-shaped cross section. A shutter 8 is slidably disposed in a substantially U-shaped shutter slide recess 18 outside the upper and lower surfaces 5e, 5f and the front end 5a of the cartridge 5, and the shutter 8 is mounted on the front end 5a. Along the arrow a which is the insertion direction
It is slidably mounted in the directions of arrows c and d which are perpendicular to the direction. Note that this shutter 8
Is urged to slide in the direction of arrow c to the closed position by a built-in shutter spring 8d. In the lower shell 4 of the cartridge 5, a pair of left and right positioning reference holes 9 each composed of a perfect circular hole and an oblong hole is formed at a position deviated toward the front end face 5a. A pair of left and right semicircular recesses 10 are formed on the left and right side surfaces 5 b and 5 c of the cartridge 5 at positions near the front end surface 5 a of the lower shell 4. At the corner 11a between the front end surface 5a of the cartridge 5 and the right side surface 5b, which is one side surface, a slope 12 for preventing erroneous insertion, which is a so-called C surface formed by cutting the entire upper and lower shells 3, 4 at 45 ° is formed. Have been. 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.
A capacity identification hole 14 is formed at a corner 11c between the end face 5d and the right side face 5b which is one side face.

A pair of upper and lower cleaning sheets 15, which are non-woven fabrics cut into a substantially horseshoe shape as shown in FIG. 32, are laid on the inner wall surfaces of the upper and lower shells 3 and 4 by bonding or the like. A lifter 16 for making a pair of upper and lower cleaning sheets 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 driven to rotate at a disk surface position at a height of approximately H _1/2 from the lower surface 5f of the cartridge 5.
And, a pair of upper and lower horizontal plate portions 8a, 8b of the shutter 8
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, 4 are formed. In addition, the upper and lower surfaces 5e, 5f of the upper and lower shells 3, 4 of the cartridge 5 are formed with a lapel sticking recess 17 having a shape bypassing the rear end surface 5d.

Then, as shown in FIG. 33, the 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 driving pin 25 for a small-capacity floppy disk FD, and the like are mounted on the disk table 23. The head arm 27 is mounted on a head arm mounting base 26a of the carriage 26 by a leaf spring 30. Are mounted so as to be rotatable in the directions of the arrows e and f, which are the up and down directions, via. The head arm 27 is rotationally urged downward by a head pressure bonding spring (not shown) in the direction of arrow f. When the carriage 26 is horizontally driven by the linear actuator in the directions of arrows a and b, 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 arranged 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 two-dot chain line.
33, between an unloading position raised by a predetermined height and a 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. 33, 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 two-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 dotted line, the height is higher with respect to the lower magnetic head 29,
After the cartridge FDC is horizontally inserted into the unloading position lowered with respect to the upper magnetic head 28 from the direction of arrow a, the small-capacity floppy disk cartridge FDC is lowered vertically by the 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 bins (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 by 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. 29 and 30 to the open position shown in FIG. 31 by a shutter closing mechanism (not shown) installed in the drive FDD. 8d, the shutter 8 is slid in the direction of the arrow d so that a pair of upper and lower shutter holes 8e of the shutter 8 are superimposed on a pair of upper and lower head insertion holes 7 of the cartridge 5,
The pair of upper and lower head insertion holes 7 are opened,
The pair of upper and lower shutter holes 8e and the head insertion hole 7 are inserted vertically inside the upper and lower pair of magnetic heads 28 and 29.

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 as shown by the solid line in FIG. Is chucked on the magnet sheet 24 of the disk table 23, the spindle 22 is relatively fitted into the center hole 2a of the center core 2 from below, and the rotation drive pin 25 on the disk table 23 is rotated.
Are relatively fitted into the rotary drive bin fitting hole 2b formed at the eccentric position of the center core 2 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 lowered vertically in the direction, the head pressure spring rotates from the unloading position to the loading position in the direction of arrow f, and the upper magnetic head 28 descends from the unloading position to the loading position in the direction of arrow f. Then, 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
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 bin 25. The disk 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 integrally and horizontally driven in the directions of arrows a and b 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 the arrows a and b, and data is recorded and / or reproduced on the floppy disk 1.

It should be noted that the small-capacity floppy disk cartridge F after recording and reproduction of the floppy disk 1
The DC unloading operation to the outside of the small-capacity floppy disk drive FDD is performed in the reverse of the above-described loading operation, and the small-capacity floppy disk cartridge FDC is moved from the loading position shown by a solid line in FIG. When the center core 2 is lifted vertically from the disk table 23 by the parallel movement to the unloading position indicated by the dotted chain line in the direction of arrow h, the head arm 27 is moved upward.
31 is rotated from the loading position shown by the solid line in FIG. 31 to the unloading position in the direction of arrow e against the head pressure spring, and the upper magnetic head 28 is raised from the loading position to the unloading position in the direction of arrow e. 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 as shown in FIG.
29 and 30 from the open position shown in FIG. 1 to the closed position shown in FIGS. 29 and 30 by a shutter spring 8d in the direction of arrow c.
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. 34 to 36, a large-capacity floppy disk recorded and / or reproduced by a large-capacity floppy disk drive HFDD to be described later. The cartridge HFDC has a structure in which the floppy disk 1 made of a magnetic sheet having a diameter of 3.5 inches is bonded to the outer periphery of the center core 2 which is a disk made of a stainless steel plate, similarly to the small-capacity floppy disk cartridge FDC described above. The large-capacity floppy disk HFD is rotatably housed in a cartridge 5 constituted by upper and lower shells 3 and 4 formed of a synthetic resin. Then, the recording capacity of the large-capacity floppy disk HFD is set to 1
In order to increase the capacity to at least 00 MB, preferably 300 to 700 MB, the magnetic films on the upper and lower surfaces of the large-capacity floppy disk HFD are thinned to the order of submicron, and the rotational speed of the large-capacity floppy disk HFD is set to a high speed of 3600 rpm or more. It is possible to raise to the rotation range.

On the other hand, this large-capacity floppy disk cartridge HFDC has a recording capacity of 1 to 5 in a large-capacity floppy disk drive HFDD described later.
The external dimensions and thickness of the cartridge 5 of the large-capacity floppy disk cartridge HFDC are set to be compatible with the small-capacity floppy disk cartridge FDC of 2 MB. And the thickness is substantially the same. Then, in the large-capacity floppy disk drive HFDD, which will be described later, the large-capacity floppy disk cartridge HFDC is distinguished from the small-capacity floppy disk cartridge FDC. , The arrangement of the write protector 13 and the capacity identification hole 14 is reversed,
A newly provided large-capacity identification hole 31 is formed at a position near one of the reference holes 9 formed in a perfect circular hole. Note that this large-capacity floppy disk cartridge HF
In DC, the planar shape of the shutter 8 is substantially T-shaped to increase the effective area inside the cartridge 5 and to prevent erroneous insertion corresponding to the slope 12 for preventing erroneous insertion of the small-capacity floppy disk cartridge FDC. Groove 2
Reference numeral 0 denotes an upper surface 5e of the cartridge 5, which is formed at a corner 11a on one end side of the front end surface 5a. The rotation drive bin fitting hole 2b formed in the center core 2 of the floppy disk 1 in the large capacity floppy disk cartridge HFDC is formed in the center core 2a of the floppy disk 1 in the small capacity floppy disk cartridge FDC. Rotary drive pin fitting hole 2b
It is formed in a hole having a size sufficiently larger than that.

(3) Outline of Large-Capacity Floppy Disk Drive Next, as shown in FIGS. 1 to 5, the present invention is an example of a disk drive and constitutes a higher-level disk drive. Large capacity floppy disk drive HF
In the DD, upper and lower covers 42 and 43 made of a thin sheet metal or the like are detachably attached above and below a chassis 41 made of a light metal such as a sheet metal or an aluminum die-cast.
A front panel 44 formed of a synthetic resin or the like is detachably attached to these front sides to form a flat rectangular parallelepiped drive body 45. The external dimensions and thickness of the drive body 45 are small-capacity floppy disks. -It has the same dimensions as the drive FDD. A horizontally long cartridge insertion port 46 is formed at 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 unit 49 for displaying an operation state of the drive are attached to left and right sides of a 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 arranged on the upper surface of a rotor fixed to the upper end of the spindle 52. The upper surface of the disk table 53 has a magnetic sheet for chucking or a rotation drive pin 55 for a small-capacity floppy disk FD. Etc. are attached. A cartridge holder 56 made of sheet metal or the like is provided above the chassis 41 on the front panel 44 side.
A cartridge loading mechanism 58 having a slide plate 57 made of a metal plate or the like for driving the ascent and descent in the directions of arrows g and h by a parallel movement between the unloading position and the loading position is incorporated. A pair of upper and lower magnetic heads 101 and 102 configured as flying heads are provided on the upper portion of the chassis 41 on the rear end side opposite to the front panel 44 side as described later.
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. And
A motor board 59 and a main board 6 are provided below the chassis 41.
A plurality of circuit boards such as a switch board 61 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. On the upper part of the chassis 41, 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 the cartridge holder 56, and the reference pin 64 is a height reference pin. Is also used. The cartridge insertion detection switch 66, which is a push switch mounted on the upper part of the switch board 61, the erroneous erasure prevention detection switch 67, the small capacity detection switch 68, and the large capacity detection switch 69 pass through the chassis 41 and the slide plate 57. And is exposed at the lower part of the cartridge holder 56. An eject switch 70 that is turned on by the eject button 48 is mounted on the lower surface of the front end of the switch board 61 (the end on the front panel 44 side).

As shown in FIGS. 6 and 7, 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. The motor 51 is screwed to the lower portion of the bottom plate portion 41a of the chassis 41 by a motor board 59 via a total of three spacers 71. The disk table 53 mounted on the upper part of the spindle motor 51 protrudes from the opening 72 formed in the bottom plate 41a above the bottom plate 41a. As shown in FIG. 8, the cartridge holder 56 is
a, left and right side plate portions 56b vertically lowered from both left and right sides thereof, and a pair of left and right bottom plate portions 56c horizontally folded inward from lower ends of the left and right side plate portions 56b.
And a large-capacity floppy disk cartridge HFDC
The small-capacity floppy disk cartridge FDC is horizontally inserted in a cartridge insertion space 56d surrounded by a top plate portion 56a of the cartridge holder 56, left and right side plate portions 56b and left and right bottom plate portions 56c from the directions of arrows a and b. It is configured to be put in and out. 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. As shown in FIG. 4, the slide plate 57 also has a horizontal bottom plate portion 57a, similarly to the chassis 41, and left and right side plate portions 57b vertically raised from the left and right sides of the bottom plate portion 57a. I have. And, this slide plate 57 has its bottom plate 5
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 chassis 4.
On the bottom plate portion 41a of the first unit 41, it is slidable in the directions of arrows a and b between the unloading position and the loading position.

Then, the cartridge loading mechanism 5
8, four guide pins 75 formed by drawing or the like on the front and rear ends of the left and right side plate portions 56b of the cartridge holder 56, as shown in FIGS. 2, 3, 4, 9, and 10; Left and right side plate portions 57b of the slide plate 57
, And a total of four inclined guide grooves 76 in which a total of four guide pins 75 are slidably engaged, and a pair of right and left integrally formed at the center of the left and right side plates 56b of the cartridge holder 56 in the front-rear direction. Guide projection 77
Are formed on the left and right side plate portions 41b of the chassis 41,
Arrows g and h in which a pair of left and right guide projections 77 are in the vertical direction.
And a pair of right and left vertical guide grooves 78 slidably engaged in the directions. The slide plate 5
7 is slid in the forward direction of the arrow b by a tension coil spring 79 (see FIG. 4) which is a slide urging means mounted between the chassis 41 and the rear end of the chassis 41 (the front panel 44). On the other side)
An eject motor 80 is mounted on one side of the bottom plate 41a. And this eject motor 8
An ejection cam 82 in which an ejection drive bin 81 is formed at an eccentric position is attached to 0, and an ejection arm 83 extending rearward from the rear end of one side plate 57b of the slide plate 57 is attached to the ejection cam 82. The ejection drive pin 81 is configured to be driven. And FIG.
As shown in FIG. 7, a cartridge insertion detection lever 84 also serving as a shutter opening / closing lever is provided around a fulcrum pin 85 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. FIG.
Are rotatably mounted in the directions indicated by arrows i and j between a locked position indicated by a solid line and an unlocked position indicated by a two-dot chain line, and are rotated in a direction indicated by an arrow i by rotation urging means (not shown). Rotationally biased. The cartridge insertion detecting lever 84 locks and unlocks a locked portion 86 formed on the slide plate 57.

According to the cartridge loading mechanism 58, as shown in FIGS. 4 and 9, the slide plate 57 is slid in the direction of arrow a to the rear unloading position against the tension coil spring 79. ,
An arrow h, which is locked by the cartridge insertion detecting lever 84 engaged with the locked portion 86 and the four guide pins 75 of the cartridge holder 56 are upward by the four inclined guide grooves 78 of the slide plate 57. is pushed up in the direction, while guiding the pair of right and left guide projections 77 in a pair of right and left vertical guide grooves 78, the cartridge holder 56 up to Anne Rothe viewing position P ₁₃ of the cartridge insertion opening 46 of the same height as shown in FIG. 9 parallel motion It is driven up by. When the cartridge insertion detection lever 84 is rotated in the direction of arrow j from the lock position shown by the solid line in FIG. 4 to the lock release position shown by the two-dot chain line, the lock of the slide plate 57 by the cartridge insertion detection lever 84 is released. This slide plate 57
There is slid in the arrow b direction by the tension coil springs 79 to the front of the loading position P ₁₂ shown in shown in FIG. 10 (B) from the unloading position P ₁₁ shown in FIG. 10 (C), the total of four of the slide plate 57 Slant guide groove 7
8, a total of four guide pins 75 of the cartridge holder 56 are pushed down in the arrow g direction below,
The pair of left and right guide projections 77 is connected to the pair of left and right vertical guide grooves 7.
While guiding at 8, the cartridge holder 56 of Figure 10 set below the unloading position P ₁₃ (A)
Driven downward by parallel motion in the direction of the arrow g to the loading position P ₁₄ shown by the solid line in. At this time, as shown in FIG. 4, the slide plate 57 is driven at a low speed by a damping action of a damper 88 mounted on the bottom plate portion 41a of the chassis 41 and 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. Then, when the ejection cam 82 is driven by one turn from the position shown in FIG. 10A by the ejection motor 80, the ejection drive pin 81 slides as shown in FIGS. 10B and 10C. The eject arm 83 of the plate 57 is hooked, and the slide plate 57 is
It is slidably driven in the arrow a direction from the unloading position P ₁₂ to the rear of the loading position P ₁₁ to against the tension coil spring 79, the cartridge holder 56 in FIG. 1
By parallel motion from the loading position P ₁₄ shown in 0 (A) to the unloading position P ₁₃ shown in FIG. 9 are driven upward in the direction of arrow h, it is automatically returned to the direction of arrow i to the lock position indicated by solid lines in FIG. 4 Cartridge insertion detection lever 8
And is configured to slide plate 57 is automatically locked again in its unloading position P ₁₃ by four. As shown in FIG. 3, 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 in the directions of arrows k and m around the fulcrum pin 90. The cartridge erroneous insertion prevention lever 89 is rotationally urged in the direction of arrow k by a tension coil spring 91 which is a rotational urging means attached between the lever 89 and the top plate 56a. Further, a pair of left and right cartridge pressing springs 92 formed 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 a lower cover 43.
The whole 1 is elastically supported on the upper portion of the lower cover 43 by a total of four insulators 93 to provide a large capacity floppy disk drive HFDD against external vibrations and the like.
Vibration resistance has been run.

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, as shown by a two-dot chain line in FIGS. 3, 4 and 9, the large-capacity floppy disk cartridge H
FDC or small capacity floppy disk cartridge F
The DC 13 cartridge holder 56 is moved from the cartridge insertion port 46 to the unloading position P _13.
When the cartridge 5 is inserted horizontally in the direction of arrow a, the cartridge insertion detecting lever 84
Is rotated in the direction of arrow j from the locked position to the unlocked position, during which the cartridge insertion detecting lever 84 is rotated.
As a result, these shutters 8 are opened in the direction of arrow d against the shutter spring 8d. At the moment when the cartridge insertion detecting lever 84 is rotated in the direction of the arrow j to the unlock position, the cartridge holder 56 allows these large-capacity floppy disk cartridges HF.
DC or small capacity floppy disk cartridge FD
C is driven downward in the direction of the arrow g to the loading position P ₁₄ shown by Ann low Dink position P ₁₃ in FIG. 10 (A), these high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC is the loading It is loaded horizontally in the 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 port 46, the cartridge erroneous insertion preventing lever 89 moves relative to the erroneous insertion preventing groove 20. Or by rotating in the direction of arrow m by the slope 12 to escape, 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 inverted direction), the cartridge is erroneously inserted. The insertion prevention lever 89 can inhibit the insertion of the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC.

[0030] 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 height reference pins 65 by a pair of left and right cartridge pressing springs 92, and a 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, and the recording capacity of the floppy disk 1 is determined by the erroneous erasure detection switch 67, large-capacity detection switch 69, or small-capacity detection switch 68. Is detected. Then, the center of the floppy disk 1 is inserted into the center core hole 6 of the cartridge 5 from below.
3 is chucked by the magnet sheet 24, and the center hole 2a of the center core 2 is
And these rotary drive pin fitting holes 2b
Is fitted to the rotation drive pin 25. These floppy disks 1 are each driven to rotate at a predetermined rotational speed by a spindle motor 51, and a pair of upper and lower magnetic heads 1 are driven by a linear actuator 103.
01,102 is while transferring in the arrow a · b along the scanning center P _2, becomes these data to a floppy disk 1 selectively recorded and / or to play.

At this time, with respect to the floppy disk 1 of the small-capacity floppy disk cartridge FDC, a pair of upper and lower members is positioned by a positioning function based on an engagement relationship between the rotation drive pin 25 and the rotation drive pin fitting hole 2b of the center core 2. Of the floppy disk 1 with respect to the magnetic heads 101 and 102 of the floppy disk 1, and the floppy disk 1 is
By rotating and driving at a low speed of 50 rpm, data recording and / or reproduction is performed with the pair of upper and lower magnetic heads 101 and 102 being in contact with the upper and lower surfaces of the floppy disk 1. On the other hand, in the floppy disk 1 of the large-capacity floppy disk cartridge HFDC, the rotation assisting pin fitting hole 2b of the center core 2 is formed in a large hole, and the rotation driving pin 25 is formed in the rotation driving pin fitting hole. 2b. Accordingly, with respect to the floppy disk 1 of the large-capacity floppy disk cartridge HFDC, the positioning on the circumference by the rotation drive pin 25 like the small-capacity floppy disk cartridge FDC is not performed, and the tracking is performed by the tracking servo method described later. While performing, the floppy disk 1 is 360
By rotating and driving at a high speed of 0 rpm or more, a 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 floppy disk 1 in a non-contact state. , With a large capacity (high density) of 100MB or more,
Record and / or reproduce data.

When the eject button 48 is pressed after data is recorded and / or reproduced on the floppy disk 1 in this manner, the eject switch 70 is turned on, and the eject motor 82 rotates the eject cam 82 by one turn. being driven, in the direction of arrow h high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC is by the cartridge holder 56 to the unloading position P ₁₃ shown in FIG. 9 from the loading position P ₁₄ shown in FIG. 10 (a) A large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk cartridge is driven by a cartridge insertion detecting lever 84 which is driven upward and rotated in the direction of arrow i from an unlocked position shown by a two-dot chain line to a locked position shown by a solid line in FIG. Mosquito With cartridge FDC is pushed in the arrow b direction as shown by the two-dot chain line from the cartridge insertion port 46 in FIG. 9, the shutter 8 is a shutter spring 8d
Is closed in the direction of arrow c.

(4) Description of Linear Actuator Next, as shown in FIGS. 11 to 14, a pair of upper and lower magnetic heads 101 and 102 formed in a flying head.
The arrows a, transported to b along the scanning center P _2. The linear actuator 103 includes a pair of left and right coils 104, a pair of left and right magnet plates 105, and a magnetic circuit 108 having a closed magnetic path formed by yokes 106 and 107.
The voice coil motor 109 is provided with: At this time, the pair of upper and lower magnetic heads 101 and 102 are mounted on a carriage 11 made of synthetic resin or the like, as will be described later.
1 is supported via a pair of upper and lower head arms 112 and 113. Then, the carriage 111 is an arrow along the scanning center P ₂ while being guided by the guide main shaft 114 and the guide auxiliary shaft 115 in the bottom plate portion on 41a attached to parallel form and scanning center P ₂ of the chassis 41 a, in the direction b It is slidable. A pair of left and right coils 1 is mounted on the upper part of a coil receiving base 116 integrally formed on the left and right sides of the carriage 111.
04 is mounted horizontally and adhered by an adhesive 117. On the other hand, a pair of left and right magnetic circuits 108 is 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. Is 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 P2 parallel to horizontally 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 is The pair of left and right magnetic circuits 108 are inserted into the outer periphery of the lower yoke 107 (or the upper yoke 106) in a non-contact state. Then, the pair of left and right coils 104 is connected to the main board 60 via the flexible printed board 118 shown in FIG.
And a pair of left and right coils 1
By applying a control current to the pair 04, a pair of left and right magnetic circuits 108 generate a propulsive force on the pair of left and right coils 104, and move the carriage 111 along the guide main shaft 114 and the guide sub shaft 115 in the directions of arrows a and b. Transport (seek and tracking).

(5) Description of Guide Spindle Attaching Device Next, as shown in FIGS.
First, the guide spindle mounting device 121 for mounting the shaft on the chassis 41 forms a small-diameter tapered shaft portion 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 cut and raised vertically upward from the bottom plate portion 41a of the chassis 41.
Are formed at right angles to the main shaft 114.
Main bearing hole 1 into which the tapered shaft portion 122 is inserted
25 are formed. In addition, this guide main bearing hole 1
Reference numeral 25 is formed to have an intermediate diameter 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 P ₂ to the scanning center of the chassis 41 at the rear end fixed position of the guide main shaft 114 A side plate portion 41b is disposed, and a guide main bearing groove 126 cut vertically downward from the upper end thereof is formed in the rear side plate portion 41b, and the guide main bearing groove 126 is formed.
Has a V-shaped tapered surface 127 at the lower end.
A leaf spring 128 is detachably attached to the rear surface (the surface opposite to the front panel 44 side) of the rear side plate portion 141c by a pair of left and right positioning dowels 130 and one or more screws 131. The center P of the guide spindle 114 is located above the center of the leaf spring 128.
A pressing piece 129 inclined at an angle θ ₁ with respect to ₁₁₄ is formed integrally. Then, when attaching the guide main shaft 114 parallel to the horizontal state and scanning cent over P ₂ on the chassis 41, as shown in FIG. 16, the guide main shaft 1
14 is inserted into the guide main bearing hole 125 from the direction of arrow n, and the rear end 114b of the guide main shaft 114 is inserted into the guide main bearing groove 126 from the direction of arrow O. A pair of left and right dowels 130 of the rear side plate portion 41c of the chassis 41 are fitted and positioned from the back side by a pair of dowel holes 132 for positioning from the back side, and are inserted into a pair of left and right screw insertion holes of the leaf spring 128 from behind. The leaf spring 128 is screwed to the back surface of the rear plate portion 41c from the direction of arrow n by attaching the screw 131 to one or a plurality of screw holes formed in the rear plate portion 41c. Then, the panel panel 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 The arrow p is pressed by the pressing piece 129 to the arrow 123.
Direction pressing force _Fp is applied. And the pressing force F _p
The guide main shaft 114 by the horizontal component force F _n of is pressed in the arrow n direction, which is the axial direction, the guide main shaft 11
4 with the tapered shaft portion 122 is press-fitted by the wedge acting on the guide main bearing hole 125, the guide main shaft 114 by the vertical component force F _o of the pressing force F _p is the direction perpendicular to the axial direction arrows When pressed in the O 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 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, the single leaf spring 128 which is a single component having the suppressing 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, extremely easily and with a low number of parts and a small number of assembling steps that are only required to be screwed with one or a plurality of screws 131 on the rear surface of the rear surface c. Cost reduction and productivity can be significantly improved.

(6) Description of the guide sub-shaft and the yoke attaching device Next, as shown in FIGS.
And a pair of upper and lower yokes 106 and 107 of the magnetic circuit 108
A pair of left and right mounting device 141 for mounting the scanning center P ₂ throat parallel form on the chassis 41,
A yoke mount 142 made of a non-magnetic member such as a synthetic resin is used. A pair of recessed front and rear yoke fitting portions 143 are formed on both ends of the yoke mounting table 142 in the front and rear length direction, and are provided on the rear side (or front side) of one yoke fitting portion 143. The yoke contact piece 144 is integrally formed. A pair of front and rear screw insertion holes 145 penetrating the yoke mounting table 142 in the up-down direction is formed at the center of both ends in the front-rear length direction of the yoke mounting table 142. A pair of front and rear positioning dowels 146 are formed on the lower surfaces at both ends in the front and rear length direction. Then, screw insertion holes 148 are provided at four corners of the yoke holding plate 147 which is placed horizontally across the upper part of the pair of left and right magnetic circuits 108.
Are formed. The yoke pressing plate 147 also has a function as an optical sensor holding plate for mounting an optical sensor described in detail later. The yoke pressing plate 147 has a pair of left and right upper yokes 106 formed with a positioning recess 149 at the center in the left-right direction, and a sensor mounting window 150 formed at the center of the recess 149. . A pair of upper and lower yokes 106, 1
A screw insertion groove 160 is formed at both front and rear ends of 07. Here, the front and rear ends 107a of the lower yoke 107 are butted against butting portions 106a vertically bent downward from the lower surfaces of the front and rear ends of the upper yoke 106, and the pair of upper and lower yokes is caused by the magnetic force of the magnet plate 105. A closed magnetic path is formed by closely adjoining the upper and lower yokes 106 and 107 and the upper and lower ends of the upper and lower yokes 106 and 107 have similar protrusions. A joining portion may be formed. Then, as shown in FIGS. 18A and 18B, one of the pair of left and right yoke mounting bases 142, and the rear end side of the front and rear ends that are the lower portions of the pair of front and rear yoke fitting portions 143. Has a through hole 15 for inserting the guide sub shaft 115 horizontally.
1 is formed, on the front side is formed a blind hole 152, the through holes 151 and blind holes 152 are formed in parallel horizontal state scanning center P _2.

The guide counter shaft 115 and the yoke 10
Scanning center P on chassis 41
_When mounting in a horizontal state parallel to ₂ , first
And (A) and (B) of FIG.
15 is inserted horizontally through the through-hole 151 of one yoke mount 142 from the front end 115a, which is one end thereof, in the direction of arrow n from the rear, and the front end 115a is fitted into the blind hole 152. However, in this fitted state, the rear end 115b of the guide sub shaft 115 protrudes rearward from the through hole 151 by the protruding amount X.

Next, as shown in FIGS. 18 and 19, a pair of left and right yoke mounting bases 143 are fitted into a pair of left and right dowel holes 153 formed in the bottom plate portion 41a of the chassis 41 by a pair of front and rear dowels 146. inserting the yoke mount 142 of the left and right pair is engaged when positioned scanning center P ₂ and parallel horizontally on the bottom plate portion 41a, the rear end 115b of the guide sub-shaft 115 is inside of the side plate portion 41c after the chassis 41 Is done. Then, the front and rear ends of the pair of left and right yokes 106 and 107 are fitted into the pair of front and rear yoke fitting portions 144 of the pair of left and right yoke mounting bases 142 from above and are horizontally installed. At this time, the rear end (or front end) of the pair of left and right yokes 106 and 107 is
4 so that the pair of left and right yokes 10
6, 107 can be easily and accurately positioned in the yoke fitting portion 143.

Next, as shown in FIGS. 18 and 19, the yoke pressing plate 14 is placed between the upper portions of the pair of left and right upper yokes 106.
7 is placed horizontally, and at this time, the yoke holding plate 147
The pair of left and right upper yokes 106
The yoke holding plate 1
47 can be easily positioned with respect to the upper yoke 106. Thereafter, a total of four screws 154 having a long shaft length are vertically inserted into the four screw insertion holes 148 of the yoke holding plate 149 from above, and these screws 1
54 is a pair of left and right yokes 106 and 1079
Through 50, a total of four screw insertion holes 145 of a pair of left and right yoke mounts 142 are inserted from above. Then, the lower ends of these four screws 154 are attached to a total of four screw fixing holes 155 formed in the bottom plate portion 41a of the chassis 41, and the four screws 154 make the yoke pressing plate 149, the left and right pair. Yokes 106, 10
7 and the yoke mounting table 142 are fastened together with the bottom plate portion 41a.
When screws are fastened to the upper guide sub-shaft 115 and a pair of right and left yokes 106 and 107 are mounted parallel to form a scanning center P ₂ on the chassis 41.

Since the yoke mounts 142 are screwed onto the bottom plate 41a of the chassis 41, the rear end 115a of the guide sub shaft 115 is
The rear plate 41c of the chassis 41 serves as a stopper for preventing the guide sub-bow 115 from falling off, and the guide sub shaft 115 is positioned rearward from the yoke mount 142 in the direction of arrow q. Will not fall off.

According to the guide sub-shaft and yoke mounting device 141 configured as described above, the yokes 106, 10
Yoke mount 1 for mounting 7 on chassis 41
At 42, the mounting base for the guide sub-shaft 115 can also be used, and the rear plate 41c of the chassis 41 can also serve as the stopper for preventing the guide sub-shaft 115 from falling off, thereby reducing the number of parts and the number of assembly steps. Therefore, cost reduction and productivity can be significantly improved.

(7) Description of bearing device for guide main shaft and guide sub shaft Next, as shown in FIGS. 20, 21 and 22, in the bearing device 171 for the guide main shaft 114 and guide sub shaft 115, first, The guide main shaft 114 and the guide sub shaft 115 are configured as cylindrical shafts made of stainless steel or the like.
14 is configured as a large diameter shaft, and the guide counter shaft 115 is configured as a small diameter shaft. As described above, the pair of upper and lower magnetic heads 101 and 102 is
A pair of front and rear thrust bearings 172 made of a cylindrical bearing such as an oilless metal are integrally buried at both front and rear ends substantially at the center in the left-right direction of the carriage 111 mounted via the third through an outsert molding or the like. The carriage 111 is slidably inserted around the outer periphery of the guide main shaft 114 by a pair of front and rear thrust bearings 172. The center P ₁₁₄ of the guide spindle ₁₁₄
There are disposed in the scanning center P ₂ on or only slightly (a few millimeters) the scanning center P ₂ parallel form at a position offset with respect to the scanning center P _2. The thrust bearing 173 of the guide counter shaft 115 is integrally formed at a position closer to the outside of the lower portion of one of the pair of left and right coil receiving bases 116 formed integrally with the carriage 111. Note that the thrust bearing 173 has a U-shaped groove 173b inside a substantially U-shaped projection 173a that is opened laterally outward of the coil receiving base 116.
It is slidably inserted into the outer periphery of the guide sub shaft 115 by the U groove 173b. The horizontality of the carriage 111 is set by two guide shafts, a guide main shaft 114 and a guide sub shaft 115, and the perpendicularity of the carriage 111 to the scanning center P ₂ is set by the guide main shaft 114, and the guide sub shaft 115
Has a function of stopping rotation of the carriage 111 about the guide spindle 114.

The other side of the coil receiving base 116 provided with the thrust bearing 173 on one side is provided with the coil 1
A flexible printed circuit board holding portion 191 for holding the flexible printed circuit board 118 connecting the printed circuit board 04 and the printed circuit board arranged on the chassis 41 along the outer surface of the coil 104 is integrally formed.

The flexible printed circuit board holding section 19
1 is provided at the end of the coil receiving base 116 with the coil 1
The first holding wall 19 erected along the outer surface of the first holding member 04
1a and a substantially inverted U-shaped second portion which is connected to the upper end of the first holding wall 191a and forms a storage space for the flexible printed circuit board 118 between the first holding wall 191a and the first holding wall 191a. And the holding wall 191b.

The flexible printed circuit board 118
One end is connected to the coil 104, and the other end is connected to a printed circuit board disposed on the chassis 41.

On one end side of the flexible printed circuit board 118, a first held portion 118a and a second held portion 118b which is bent substantially at right angles to the first held portion 118a are provided. ing. The above-mentioned first held part 1
18a is held on the lower surface of the coil receiver 116,
The second held portion 118b is held between the first holding wall 191a and the second holding wall 191b of the flexible printed circuit board holding portion 191 with the inner and outer surfaces sandwiched therebetween.

The flexible printed circuit board holding section 19
1, the second held portion 118b is
The flexible printed circuit board 118 held along the outer surface of the chassis 104 extends in the moving direction of the carriage 111 and is bent (turned back) in a U-shape. It is connected to a printed circuit board arranged above.

As shown in FIG. 23, one side 191c of the second holding wall 191b of the flexible printed circuit board holding portion 191 is connected to the flexible printed circuit board 118.
The first held portion 118a and the second held portion 118b are formed at a position deviated toward the curved portion 118e from the edge portion 118d of the continuous right-angled bent portion, and when the carriage 111 moves, Flexible printed circuit board 11
8 is applied to the edge portion 118d of the bent portion between the right-angled first held portion 118a and the second held portion 118b.
And the edge portion 118d is protected.

The bearing device 17 configured as described above
According to No. 1, the thrust bearing 172 of the guide main shaft 114 is disposed substantially at the center of the carriage 111, while the thrust bearing 173 of the guide sub shaft 115 is mounted on the coil receiving base 116.
By arranged at the position of the outer end side of the lower part of, it is possible to set a large span L ₁ between the center P _114, P ₁₁₅ and the guide main shaft 114 and the guide sub-shaft 115, the guide main shaft 114 and guide sub The backlash of the carriage 111 due to the clearance of the thrust bearings 172 and 173 with respect to the shaft 115 can be significantly reduced, and the carriage 111 moves the pair of upper and lower magnetic heads 101 and 102 along the guide main shaft 114 in the directions of arrows a and b. The data can be stably transferred, and high-density recording and / or reproduction of data with respect to the floppy disk 1 can be stably performed with high accuracy. Particularly, the center P ₁₁₄ of the guide spindle 114 is connected to the scanning center P _2.
By being placed on or near the position, it is possible to move the R / W gap of the pair of upper and lower magnetic heads 101, 102 scanning center P ₂ in the arrow a, with high accuracy along the b direction.

However, the guide spindle 114 can be arranged within the projected area of the carriage 111, and
Since the guide sub shaft 115 can be arranged within the projected area of the one coil 104, the guide sub shaft 115 and its thrust bearing 173 do not protrude laterally outward of the one coil receiving base 116, and the ejection is performed. motor 80 other components and can significantly reduce the clearance L ₂ between the one coil cradle 116 such, to improve the space factor in the chassis 41, a small high-capacity floppy disk drive HFDD, The weight can be reduced. Further, the thrust bearing 17 of the guide counter shaft 115
3 may have a structure in which another part is attached to the coil receiving base 116. However, when this thrust bearing 173 is integrally formed with the coil receiving base 116, cost reduction and productivity improvement by reducing the number of parts and the number of assembling steps can be achieved. Can be planned. Although the thrust bearing 173 of the guide countershaft 115 can be disposed above the coil 104, if the thrust bearing 173 is disposed below the coil receiving base 116, the thrust bearing 173 can be placed on the coil receiving base 116.
It is easy to integrally mold with a synthetic resin or the like, and the productivity is improved.

(8) Description of Head Assembly Next, as shown in FIGS. 24 and 25, the carriage 111 of the head assembly 110 is formed of a rigid member made of a synthetic resin or a light metal such as aluminum or magnesium. A pair of upper and lower magnetic heads 101 and 102 constituted by a flying head is attached to the front end of the carriage 111 via a pair of upper and lower head arms 112 and 113. And a pair of upper and lower head arms 1
Reference numerals 12 and 113 each include an arm base 181 formed of a rigid member made of a synthetic resin, a light metal such as aluminum or magnesium, which is a molded part, and a suspension 182 formed of an elastic member such as a leaf spring. That is, the suspension 182 is integrally connected to the tip of the arm base 181 by a screw fixing method using a screw 183 or an integral molding by outsert molding.
A pair of upper and lower head bases 184 are adhered to the upper and lower opposing surfaces of the tips of the suspensions 182 of the upper and lower head arms 112 and 113, and a pair of upper and lower head bases 184 have chip-shaped upper and lower opposing surfaces. Magnetic heads 101 and 102 are bonded via a gimbal plate (not shown). The length L ₁₁ of the arm base 181 is set to 1/3 or more of the total length L ₁₂ of the head arm 112 and 113 in the pair of upper and lower head arms 112, 113. 7 and 8, the large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC are connected to the large-capacity floppy disk drive HFDD in the directions of arrows u and g and in the directions of arrows h and b. At the time of loading and unloading, the lower magnetic head 102 need not be moved up and down, so it is almost unnecessary to move the arm base 181 of the lower head arm 113 supporting the lower magnetic head 102 to the carriage 11.
1 or can be fixed with screws or the like. However, when the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is loaded into the large-capacity floppy disk drive HFDD in the directions of arrows a and g and arrows h and b, the upper magnetic head 101 performs these operations. Of the head arm 112 supporting the upper magnetic head 101 because it is necessary to move the cartridge up and down so as not to interfere with the cartridges HFDC and FDC.
Is rotatably mounted on an upper magnetic head mounting base 185 integrally formed with the carriage 11 by a rotation support mechanism 186 in directions indicated by arrows e and f, which are vertical directions.

(9) Description of Light Detector Next, as shown in FIGS. 27 to 28, the linear actuator 103 is equipped with a light detector 231 for detecting the head position. The light detecting device 231 is for tracking the small-capacity (lower-order) floppy disk 1 in the small-capacity floppy disk cartridge FDC to thereby make the small-capacity floppy disk 1 compatible. A tracking group 234 having a slit group 232 having the same pitch as the track pitch of the small-capacity floppy disk 1 and an opening 233 for detecting the outermost peripheral position of the small-capacity floppy disk 1; And light emitting section 235 which is a light emitting element for detecting the position of the opening
Sensor 23 comprising a light receiving section 236 serving as a light receiving element
7.

The tracking scale 234 includes a track gauge 241 provided with the slit group 232 and the opening 233, and a gauge halter 242 holding the track gauge 241.

The tracking scale 23
No. 4 is attached to the carriage 111 with screws 283 after the dowels 281 and 282 for positioning provided on the carriage 111 are fitted into the dowel fitting holes 249 and 250.

[0055]

The disk drive of the present invention has the following effects.

(1) In the disk drive device according to the first aspect, since the flexible printed circuit board holding portion is formed integrally with the coil receiving stand, compared with the case where the coil receiving stand and the flexible printed circuit board holding portion are formed independently and separately. The number of parts and the number of mounting steps can be reduced.

(2) In the disk drive device according to the second aspect, the flexible printed circuit board is inserted into the storage space between the first holding wall and the second holding wall of the flexible printed circuit board holding section, whereby the board is inserted. Can be held.

(3) In the disk drive device according to the third aspect, the opening end of the storage space is directed toward the lower surface of the coil receiver, so that the upper end extends upward from the lower surface of the coil receiver along the outer surface of the coil. The bent portion of the flexible printed circuit board bent toward can be easily inserted and held.

(4) In the disk cartridge of the fourth aspect, the stress is applied to the flexible printed circuit board by the second holding wall when the carriage moves, so that the stress is reduced by the flexible printed circuit board. Can be prevented from being concentrated on the edge of the right-angled bent portion.

(5) In the disk drive device according to the fifth aspect, since the coil receiving base is formed integrally with the carriage,
The flexible printed circuit board holding portion is also formed integrally with the carriage via the coil receiving stand, so that the number of parts can be further reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk drive device according to the present invention.

FIG. 2 is an exploded perspective view.

FIG. 3 is a partially cutaway plan view showing a state where an upper cover is removed.

FIG. 4 is a plan view showing a state where a cartridge holder is removed.

FIG. 5 is a bottom view of the disk drive device.

FIG. 6 is a perspective view of a chassis on which a spindle motor is mounted.

FIG. 7 is a sectional view of a main part.

FIG. 8 is an exploded perspective view of a cartridge holder part.

FIG. 9 is a side view showing an unloaded state of the cartridge holder.

FIGS. 10A, 10B, and 10C are side views showing a loading state of a cartridge holder.

FIG. 11 is a plan view showing a guide main shaft, a sub shaft, and a yoke mounting device.

FIG. 12 is a sectional view taken along line 12-12 of FIG. 11;

FIG. 13 is a side view taken along arrow 13-13 in FIG. 11;

FIG. 14 is a sectional view taken along arrow 14-14 in FIG. 13;

FIG. 15A is a partially cutaway plan view of the guide spindle mounting device. (B) is a partially cutaway front view of the guide spindle mounting device.

FIG. 16A is a sectional view taken along the line 16-16 in FIG. 15B. (B) is sectional drawing in the 16B-16B arrow of FIG.16 (A).

FIG. 17 is an exploded perspective view of a guide counter shaft and a yoke attaching device.

18A is a cross-sectional view taken along arrow 18A-18A in FIG. FIG. 18B is a cross-sectional view taken along arrow 18B-18B in FIG.

19A is a cross-sectional view taken along arrow 19A-19A in FIG. (B) is a sectional view taken along the line 19B-19B in FIG. 19 (A).

FIG. 20 is a plan view of a bearing device for a guide main shaft and a guide counter shaft.

FIG. 21 is a sectional view taken in the direction of arrows 21-21 in FIG. 20;

FIG. 22 is a perspective view of a flexible printed circuit board holding unit.

FIG. 23 is a partially cutaway side view of the flexible printed circuit board holding unit.

FIG. 24 is a perspective view illustrating a head assembly.

FIG. 25 is a plan view of the head assembly.

FIG. 26 is a side view of the head assembly.

FIG. 27 is a cross-sectional view of a photodetector.

FIG. 28 is an exploded perspective view of a tracking scale.

FIG. 29 is a perspective view of a small-capacity floppy disk cartridge.

FIG. 30 is a perspective view seen from the lower surface side.

FIG. 31 is a perspective view showing a state where a shutter is opened.

FIG. 32 is an exploded perspective view of a conventional small-capacity floppy disk cartridge.

FIG. 33 is a sectional view of a conventional small-capacity floppy disk drive.

FIG. 34 is a perspective view of a large-capacity floppy disk cartridge.

FIG. 35 is a plan view of a large-capacity floppy disk cartridge.

FIG. 36 is a bottom view of a large-capacity floppy disk cartridge.

FIG. 37 is a perspective view of a conventional disk drive device.

[Explanation of symbols]

41: chassis, 101, 102: upper and lower pair of magnetic heads, 104: coil, 109: linear actuator (voice coil motor), 111: carriage, 114
... guide spindle, 116 ... coil receiving stand, 118 ... flexible printed circuit board, 191 ... flexible printed circuit board holding part, 191a ... first holding part, 191b ... second holding part.

Claims (5)

[Claims] 1. A head that records and / or reproduces a disk-shaped recording medium, a carriage on which the head is mounted, an actuator that moves the carriage along a radial direction of the disk-shaped recording medium, In a disk drive device comprising: a coil support supporting a coil; and a flexible printed circuit board connecting the coil supported on the coil support and a printed circuit board mounted on a chassis, the coil support includes: A disk drive device, wherein a flexible printed board holding portion for holding the flexible printed board along the outer surface of the coil is integrally formed. 2. The flexible printed circuit board holding section according to claim 1, wherein the first holding wall is provided at one end of the coil receiving base so as to extend along the outer surface of the coil. A disk drive device, comprising: a second holding wall connected to an upper end and forming a storage space for a flexible printed circuit board between the first holding wall and the first holding wall. 3. The first holding wall and the second holding wall according to claim 2, wherein the second holding wall is connected to the upper end of the first holding wall in an inverted U-shape. A storage space for a flexible printed circuit board therebetween is directed to a lower surface side of a coil receiver. 4. The second holding wall according to claim 2, wherein at least a side surface of the flexible printed circuit board on a curved portion side is held along a lower surface side of a coil of the flexible printed circuit board. The flexible printed circuit board is disposed so as to be offset from the edge of the right-angled bent portion between the second held portions held along the outer surface of the coil toward the curved portion of the flexible printed circuit board. A disk drive device. 5. The disk drive according to claim 2, wherein the coil receiving base is formed integrally with the carriage.