JP2002352533A - Head actuator and disk storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase driving torque in an initial range during loading while a bent type head actuator and a VCM are miniaturized. SOLUTION: A projected part 82d projected to the outside or the like of a radial direction is formed in the end side of an unloading direction on the outer periphery of a magnet 82, and an outer R part continuous from the radial direction part of a coil 81 is overlapped on the projected part of the magnet, so that during the loading/unloading of the bent type head actuator 13 on the disk by a VCM 18, the bent type head actuator 13 easily goes over a dynamic loading/unloading lamp while the bent type head actuator 13 and the VCM 18 are miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a head actuator and a disk storage device suitable for application to, for example, a large-capacity removable hard disk drive or the like.

[0002]

2. Description of the Related Art First, conventional large-sized removable hard disk drives and removable hard disk cartridges will be described in the following order with reference to FIGS. (A1) ··· Overview of conventional large removable hard disk drive (FIGS. 48 to 63) (A2) ··· Explanation of dynamic load / unload mechanism of conventional large removable hard disk drive (FIGS. 53 to 63) (A3) Description of a large voice coil motor that rotationally drives a bent head actuator of a conventional large removable hard disk drive (FIGS. 56 to 5)
9) (A4) ··· Explanation of the cam surface that opens and closes the head of the dynamic load / unload ramp of the conventional large-sized removable hard disk drive (FIGS. 60 to 6)
3) (A5) ... Explanation of recording and / or reproducing operation of a conventional large-sized removable hard disk cartridge by a conventional large-sized removable hard disk drive (FIGS. 48 to 63) (A6) ... Conventional large-sized removable hard disk drive Description of drive control method of spindle motor of hard disk drive ((B) of FIG. 1) (A7)... Description of eject operation of conventional large-sized removable hard disk cartridge by conventional large-sized removable hard disk drive (FIG. 48)
(A8) ... Description of the driving torque of a conventional large-sized voice coil motor (FIGS. 57 to 59) (A9) ... of the head of a bending type head actuator of a conventional large-sized removable hard disk drive. Description of the wiring structure (FIGS. 64 and 65) (A10): Description of a conventional large-sized removable hard disk cartridge (FIGS. 66 to 70)

(A1) General description of a conventional large-sized removable hard disk drive First, referring to FIGS. 48 to 63, a conventional large-capacity large-sized removable disk which is an example of a disk storage device such as a conventional removable disk drive will be described. Hard disk drive (Large Removable-Hard Disk Drive.
Simply referred to as "R-HDD (large)") and non-contact start / stop.
top) R-HDD with dynamic load / unload mechanism, which is an example of the method
An outline of the (large) 101 will be described.

The conventional R-HDD (Large) 101 has a drive main body 102 whose upper surface is open, and an upper cover 103 is horizontally arranged on the upper part of the drive main body 102. The drive main body 102 and the upper cover 103 are made of a metal material such as an aluminum alloy or a synthetic resin material. A cartridge holder 104 made of a sheet metal member or the like is horizontally disposed at a front position in the drive main body 102, and a horizontal front end opening 104a is formed at the front end of the cartridge holder 104. . When the cartridge holder 104 is raised to a raised position as described later, the front end opening 104a of the cartridge holder 104 is exposed on the front surface 102a of the drive main body 102 so that the R-HDC (large) 121 described later can be moved in the front-rear direction. The cartridge insertion opening 105 for inserting and discharging the cartridge from the directions of arrows a and b is opened horizontally.

[0005] An upper cover 103 is integrally connected to an upper portion of the cartridge holder 104. The cartridge holder 104 is vertically moved by an elevating mechanism 106 arranged in the drive body 102 integrally with the upper cover 103. It is configured to be able to move up and down in the directions of the arrows c and d. A slide plate 107 that is slid in the forward and backward directions of arrows a and b, and a pair of right and left that are driven by the slide plate 107 to drive the cartridge insertion opening and the cartridge holder 104 up and down in the directions of arrows c and d. Four slide cam mechanisms 1
08. The drive body 1
An eject button 109 is provided on the front surface 102a of the device 02.

In the drive main body 102, below the cartridge holder 104, for example, a spindle motor 11 constituted by a flat brushless motor or the like is provided.
A chucking magnet 112 is embedded in a disk table 111 which rotates integrally with a spindle 110a and a rotor of the spindle motor 110. In the drive main body 102, a bent head actuator 113, which is a large rotary head actuator, is located at a position behind the cartridge holder 104.
Are arranged, and the bending type head actuator 1
13 is a pair of upper and lower suspensions 11 composed of leaf springs on the upper and lower surfaces of the tip 114a of the head arm 114.
5 is attached at a predetermined angle such as a right angle, and a pair of upper and lower floating head sliders 116, which are heads, are attached to the ends of a pair of upper and lower suspensions 115 via a gimbal or the like. The pair of upper and lower suspensions 115 are inclined symmetrically up and down so as to approach the center of the tip 114a of the head arm 114 in the thickness direction as it approaches the tip of the pair of upper and lower flying head sliders 116.

The bent head actuator 113 is rotatably mounted at a substantially intermediate portion of the head arm 114 on an outer periphery of a vertical rotation center shaft 117 mounted on the bottom of the drive main body 102 via a bearing 117a. Have been. Then, this bent type head actuator 113 is connected to an R-HD (described later) shown in FIG.
An arm lock position P11 which is an external position with respect to the C (large) 121, and an RH described later shown in FIG.
A head actuator driving mechanism for reciprocating in the directions of arrows g and h in the entire reciprocating region between the innermost position P16 of the position P14 in the recording area of the disk 125, which is the internal position with respect to the DC (large) 121, will be described later. The R-HDD (Large) 101
Drive main body 1 at a position behind HDC (large) 121
02 is mounted on the bottom. The head actuator drive mechanism includes a cam mechanism 118 provided with a dynamic load / unload ramp 169.
And a voice coil motor,
(Hereinafter, simply referred to as “VCM”) 119.

Then, the cam mechanism 118 and the dynamic load / unload ramp 169 move the bent head actuator 113 in the arm lock position P11 shown in FIG. 52 and the outer periphery of the disk 125 in the R-HDC (large) 121 shown in FIG. Arm load set near
It is configured to be mechanically driven to rotate in the directions of arrows g and h with respect to the unload position P12. And
The VCM 119 causes the bending type head actuator 113 to be loaded / unloaded in the R-HDC (large) 121 shown in FIG.
The drive is rotated in the directions of arrows g and h between the unload position P12, the outermost landing position P13 of the disk 125 shown in FIG. 54, and the innermost position P16 of the recording area position P14 shown in FIG. Is configured.

(A2)... Description of a dynamic load / unload mechanism of a conventional large-sized removable hard disk drive Here, a conventional R-HDD will be described with reference to FIGS.
The dynamic load / unload mechanism employed in the (large) 101 will be described. The dynamic load / unload mechanism includes a cam mechanism 118 and a dynamic load / unload ramp (dynamic load / anloa).
d ramp, hereinafter simply referred to as “ramp”) 1
69 are used. First, a cam mechanism 118 that rotationally drives the bending type head actuator 113 in the directions of arrows g and h is a self-locking mechanism that also includes a worm 162 and a worm wheel 163 that are driven to rotate forward and reverse by a drive motor 161. And a cam gear 1 driven by the worm wheel 163 to rotate in the forward and reverse directions in the directions of arrows i and j via a plurality of reduction gears 164.
65. The cam gear 165 and the like are provided with a mode sensor (not shown) for sequentially detecting the current position of the bending type head actuator 113 in the directions of arrows g and h.

A substantially concentric cam 166 is integrally formed on the upper surface of the cam gear 165. The cam 166 is a lower surface of the head arm 114 of the bending type head actuator 113, and is formed between the tip 114a and the rotation center shaft 117. It is configured to drive a cam follower 167 provided integrally at a substantially intermediate portion. The cam 166 has a protrusion 166a protruding in the direction of arrow j toward the cam follower 167, and an arrow i extending from the protrusion 166a.
An outer peripheral surface 116b extending in the direction and a notch 166c formed on the side of the convex portion 166a in the direction of arrow j are formed, and the convex portion 166a and the outer peripheral surface 166b constitute a driving portion of the cam follower 167. The notch 166c is formed as an escape space for the cam follower 167. And a stopper 1 for positioning the bending type head actuator 113 at the arm lock position P11.
Reference numeral 68 denotes a stopper pin 168a vertically fixed to the lower surface of the head arm 114, and an end on the arrow h direction side of a guide hole 186b formed in an arc shape on the bottom of the drive body 102 and guiding the stopper pin 168a. 168
c. The guide hole 168b
Is formed in an arc shape with the rotation center axis 117 as the center.

The lamp 169 is connected to the drive body 10
2 and a pair of slide guides 17 mounted on the bottom
A pair of upper and lower flying head sliders 116 guided by 0
52 is slidable between the retreat position P21 shown in FIG. 52 and the operation position P22 shown in FIG. The lamp 169 and the drive body 10
A tension coil spring 171 serving as a slide urging means is provided between the tension coil spring 171 and the tension coil spring 171.
As a result, the ramp 169 is slid in the direction of arrow k from the retracted position P21 to the operating position P22.

The ramp 169 is formed of a synthetic resin or the like, and a pair of upper and lower floating head sliders 116 of the bending type head actuator 113 are provided above the upper end of the ramp 169 on the side of the arrow k. A ramp arm 169a for opening and closing in the vertical direction by a cooperative action with the spring force of the pair of suspensions 115 is integrally formed. The ramp arm 169a extends from the ramp 169 in the direction of the arrow g.
Are horizontally inserted between the tip ends of a pair of upper and lower suspensions 115. The ramp arm 169a is a pair of upper and lower floating head sliders 116.
Of the lamp arm 169a, the rotation radius r1 around the rotation center axis 117 of the ramp arm 169a is the rotation center axis 117 of the pair of upper and lower flying head sliders 116. Radius of gyration r around
It is configured to be smaller than 2.

A head actuator pressing portion 169b integrally formed on the upper end of the ramp 169 in the direction of arrow m comes into contact with the outer surface 114e of the head arm 114 of the bent type head actuator 113 from the direction of arrow k. Then, the sliding urging force of the ramp 169 in the direction of arrow k by the tension coil spring 171 is transmitted to the bent head actuator 113 via the head actuator pressing portion 169b, and the bent head actuator 113 is moved by the tension coil spring 171. Is configured to be urged to rotate in the direction of arrow g by the spring force of. The stopper 1 that stops the ramp 169 at the operating position P22 is provided on the bottom of the drive body 102.
69c is fixed.

The cam mechanism 118, ramp 169 and tension coil spring 171 are constructed as described above. First, when the bending type head actuator 113 is driven to rotate to the arm lock position P11 in the direction of arrow h to lock it. Worm 162-worm wheel 16 by the drive motor 161 of the cam mechanism 118
3- The cam gear 165 is driven to rotate from the position shown in FIG. 55 to the position shown in FIG. Then, the bent head actuator 11 is moved by the convex portion 166a of the cam 166.
No. 3 cam follower 167 is pushed in the direction of arrow j, and this bending type head actuator 113 moves the arm load / unload position P12 around the rotation center axis 117.
To the arm lock position P11 in the direction of the arrow h, and is stopped by the stopper 168. The bent head actuator 113 is connected to the stopper 1
Almost simultaneously with the stop at 68, the convex portion 1 of the cam 166
66 a escapes in the direction of arrow j with respect to the cam follower 167, and the position of the cam follower 167 is regulated by the outer peripheral surface 166 b of the cam 166, and the bent head actuator 113 is moved by the stopper 168 and the outer peripheral surface of the cam 166. 16
6b to be locked mechanically at the arm lock position P11.

The bent head actuator 11
3 is rotated from the arm load / unload position P12 to the arm lock position P11 in the direction of the arrow h, the head actuator pressing portion 1 of the ramp 169 is rotated.
69b is pushed in the direction of arrow m by the bent head actuator 113, and the ramp 169 follows the bent head actuator 113 and slides along the pair of slide guides 170 from the operating position P22 to the retreat position P21 in the direction of arrow m. Is done. Then, the tension coil spring 171 is pulled in the direction of the arrow m by the ramp 169, and the tension coil spring 171 is charged with a driving force for rotationally driving the bending type head actuator 113 in the direction of the arrow g. The arm lock position P11 and the retreat position P2
In FIG. 1, as shown in FIGS. 53 and 61, a pair of upper and lower
5 and a pair of upper and lower floating head sliders 11
6 and the lamp arm 169a are R-HDCs to be described later.
It is pulled out of the (large) 121 head insertion hole 127.

Next, the bending type head actuator 113
From the arm lock position P11 shown in FIG. 52 to FIG.
52, the cam gear 165 is rotated by the drive motor 161 of the cam mechanism 118 via the worm 162-worm wheel 163-a plurality of reduction gears 164 when the arm load / unload position P12 shown in FIG. From the position shown in FIG. 53 to the position shown in FIG. Then
As shown in FIG. 53, first, the cam follower 167 of the bending type head actuator 113 is
From 66b, it relatively gets on the convex portion 166a. Then, with the rotation of the cam 166 in the direction of the arrow i, the ramp 169 starts to slide from the retreat position P21 in the direction of the arrow k by the driving force charged in the tension coil spring 171. The bending type head actuator 113 is driven to rotate in the direction of arrow g via the pressing portion 169b.

Therefore, when the cam gear 165 is driven to rotate in the direction of the arrow i from the position shown in FIG. 52 to the position shown in FIG. 53 by the drive motor 161, the bending head is driven by the driving force charged in the extension coil spring 171. The actuator 113 is moved from the arm lock position P11 shown in FIG. 52 around the rotation center axis 117 to the R-HDC (large) 121 shown in FIG.
It is rotationally driven in the direction of arrow g to the unload position P12. Then, the bending type head actuator 11
52, the ramp 169 is slid in the direction of arrow k from the retracted position P21 shown in FIG. 52 to the operating position P22 shown in FIG. 53, and the ramp 169 is stopped at the operating position P22 by the stopper 169c.
And stopped. Then, the head actuator pressing portion 169b integral with the ramp 169 is also stopped at the position shown in FIG. 53, and at the time of head loading described later, the bending type head actuator 113 is separated from the head actuator pressing portion 169b and driven to rotate in the direction of arrow g. Will be done. Then, as shown in FIG. 53 and FIG.
When the arm 69 reaches the arm load / unload position P12 and the operation position P22, the tip of the pair of upper and lower suspensions 115, the pair of upper and lower flying heads 116, and the tip of the ramp arm 169a are R-HDC (large). ) 121 head insertion hole 12
7 and stopped at a position near the outer periphery of the disk 125.

That is, the bending type head actuator 11
3 is driven to rotate in the direction of arrow g from the arm lock position P11 to the arm load / unload position P12 by the tension coil spring 171. Coil spring 1
71 will be separated from the bent head actuator 113. Thereafter, the cam gear 165 is continuously driven to rotate to the position shown in FIG. 55 by the drive motor 161 in the direction of the arrow i and stopped. It is possible to enter and exit in the directions of arrows g and h, which are outside the front side of 166.

(A3)... Description of a conventional large-sized voice coil motor for driving a bent-type head actuator of a conventional large-sized removable hard disk drive. Here, FIGS. 56 to 59 show a conventional large-sized RH.
A large-sized VCM 11 that rotationally drives a large-sized bent head actuator 113 employed in the DD (large) 101
9 will be described. The VCM 119 includes a coil 181 fixed to the end of the head arm 114 on the side opposite to the suspension 115, a magnet 182 mounted horizontally on the bottom of the drive main body 102, and upper and lower yokes 183 and 184. It is configured. The coil 181 has a substantially fan-shaped and flat air-core coil shape in which the inner end, which is the end on the rotation center shaft 117 side, has a small width and the outer end on the opposite side gradually increases. A pair of left and right outer wings 114d of substantially V shape formed integrally with the head arm 114 are formed by the coil 181.
The coil 181 is fitted to the head arm 114 by being filled horizontally (perpendicular to the rotation center axis 117) with a resin layer 185 in the air core portion of the coil 181 by outsert molding or the like. It is fixed horizontally.

The magnet 182 is formed in a flat plate shape and in a fan shape centering on the rotation center axis 117 of the head arm 114. ) Is fixed by bonding or the like. Then, the upper and lower yokes 183, 1
Reference numeral 84 denotes a ferromagnetic member such as a sheet metal, and the upper yoke 183 is formed in a substantially L-shaped plate shape. Two positioning recesses 183a are formed on two orthogonal sides of the upper yoke 183, and the protruding end of the upper yoke 183 toward the rotation center shaft 117 and one corner portion are fitted with the rotation center shaft. A hole 183b and a screw insertion hole 183c are formed. Further, the lower yoke 184 is provided with two vertical walls 184a vertically rising on two orthogonal sides, and a positioning projection 184b is provided at a substantially central portion of an upper end portion of these vertical walls 184a. Is formed. A positioning pin fitting hole 184c and a screw insertion hole 184d are formed at two corners of the lower yoke 184.

A positioning pin 186 is vertically fixed on the bottom of the drive body 102, and a screw fastening hole 186 is formed at the center of the upper end of the positioning pin 186.
a is formed. The lower yoke 184 is inserted from above into the positioning pin 186 through the positioning pin fitting hole 184c and fitted therein, and the lower yoke 184 is inserted into the screw insertion hole 184d from above by the set screw 187 from the bottom of the drive body 102. It is fixed horizontally on top. Then, with the upper yoke 183 having the magnet 182 facing downward, the two vertical walls 18
4a, and two positioning recesses 1
The upper yoke 183 is fitted to the two positioning protrusions 184b from above so that the lower yoke 1
84 is positioned horizontally. Then, the rotation center shaft fitting hole 183b at the protruding end of the upper yoke 183 is fitted into the upper end of the rotation center shaft 117 of the head arm 114 from above, and the set screw 188 inserted into the screw insertion hole 183c from above is positioned. The VCM 119 is assembled in a horizontal frame shape on the bottom of the drive main body 102 by being fastened to the screw fastening hole 186a at the center of the upper end of the pin 186. A gap 1 is provided between the lower surface of the magnet 182 and the upper surface of the horizontal coil 181, and between the lower surface of the coil 181 and the upper surface of the lower yoke 184.
89 are formed.

The V thus assembled
The CM 119 moves the coil 181 in the forward direction (the direction of the arrow A1).
Alternatively, the energization in the opposite direction (the direction of arrow A2) causes the bending type head actuator 113 to rotate the rotation center axis 11.
Around the arm load / unload position P12 shown in FIG. 53 and the innermost peripheral position P16 of the position P14 in the recording area shown in FIG. It is configured to be able to be rotationally driven by the driving torque of.

(A4)... Description of the cam surface for opening and closing the head of the dynamic load / unload ramp of the conventional large-sized removable hard disk drive. Here, referring to FIGS. A vertically symmetric cam surface integrally molded on both upper and lower surfaces will be described. First, the height of the center of the horizontal ramp arm 169a of the ramp 169 in the thickness direction is, as described later, an R-HDD (large).
The disk table 111 of the spindle motor 110 in the R-HDC (large) 121 mounted on the
The disk 125 is vertically magnet-chucked and arranged at the same height as the height of the center in the thickness direction of the disk 125 raised to a substantially middle position in the vertical direction in the cartridge body 124. That is, the lamp arm 169a
Of the disk 125 magnetically chucked on the disk table 111 of the spindle motor 110 and the horizontal reference line P.
O matches.

On both upper and lower surfaces of the lamp arm 169a, a low horizontal surface 172 formed symmetrically with respect to the horizontal reference line PO, and an up slope 173 formed with an upward slope in the direction of arrow k. , A high horizontal surface 174,
Downhill slope 17 formed with a downward slope in the direction of arrow k
5, a substantially trapezoidal, vertically symmetrical cam surface 17
6 are formed.

On the other hand, a pair of upper and lower suspensions 115 of the large bending type head actuator 113 are displaced slightly toward the distal end, and a pair of upper and lower cams of a ramp arm 169a are provided on the upper and lower opposing surfaces of the upper and lower suspensions 115. A pair of upper and lower sliding projections 177, which are cam followers with respect to the surface 176, are formed symmetrically in the vertical direction.
The pair of upper and lower slide projections 177 are formed as substantially hemispherical projections formed by, for example, stamping or outsert molding of a synthetic resin. And
The pair of upper and lower sliding protrusions 177 is caused to move by the spring force of the pair of upper and lower suspensions 115, so that the ramp arm 1 can be used.
The upper and lower surfaces 69a are elastically pressed symmetrically in the vertical direction from the direction of arrow n, and as described later, the bending type head actuator 113 is moved between the arm load / unload position P12 and the landing position P13 by arrows g, When rotating in the h direction, the pair of upper and lower sliding protrusions 117 is slid in the directions of arrows g and h on the pair of upper and lower cam surfaces 177, and the pair of upper and lower floating head sliders 116 is opened and closed in the vertical direction. It is configured as follows.

(A5)... Description of recording and / or reproducing operation of a large removable hard disk cartridge by a conventional large removable hard disk drive Here, referring to FIGS.
The recording and / or reproducing operation of the R-HDC (large) 121 by No. 01 will be described. First, at the time of disc loading, when the eject button 109 of the R-HDD (large) 101 shown in FIG. Driven upward in the direction of arrow d, the front end opening 104a of the cartridge holder 104 is opened.
Is raised to the same height position as the cartridge insertion port 105 formed on the front surface 102a of the drive main body 102, and the cartridge insertion port 105 is opened.

Therefore, as shown by a dashed line in FIGS. 49 and 50, the R-HDC (large) 121 is inserted horizontally from the cartridge insertion opening 105 into the cartridge holder 104 through the front end opening 104a in the direction of arrow a. Then, a shutter 13 of an R-HDC (large) 121 described later is used.
5 is opened in the direction of arrow m from the closed position shown in FIG. 69 to the open position shown in FIG. 70 against the torsion coil spring 147. Then, as shown in FIG. 51, the slide plate 107 of the elevating mechanism 106 is slid in the direction of arrow e,
A total of four slide cams 108 drive the cartridge holder 104 downward in the direction of arrow c to a lower position shown integrally with the upper cover 103, and the R-HDC (large) 121.
Are horizontally mounted on a pair of left and right positioning pins and a height reference pin (both not shown) in the drive body 102. At this time, as shown in FIG.
The ten disk tables 108 correspond to the cartridge body 12
4 is inserted into the disc table insertion hole 128 from below, and the spindle 1 of the spindle motor 110 is inserted into the center hole 126a of the center core 126 of the disc 125.
10a is inserted and the center core 1
26 is magnetically chucked horizontally on the disk table 108 by the chucking magnet 112. Then, the disk 125 is an R-HDC (large) 12
1 and is raised horizontally to a horizontal reference line PO, and RH
The mounting of the R-HDC (large) 121 in the DD (large) 101 is completed. When the mounting of the R-HDC (large) 121 is completed, the front end opening 104a of the cartridge holder 104 is displaced downward from the cartridge insertion port 105 of the drive main body 102, and the cartridge insertion port 105 is closed. . And the spindle motor 11
0 is rotationally driven, and the disk 125 is rotationally driven at a constant speed by the spindle motor 110.

Next, at the time of head loading, the R-HD
After the mounting of the C (large) 121, the above-described cam mechanism 118 and the extension coil spring 1 of the ramp 169 are operated by a recording and / or reproduction command signal from a host computer or the like.
71, the bending-type head actuator 113 is moved around the rotation center axis 117 by the R-
Arm lock position P11 outside HDC (large) 121
To the arm load / unload position P12 shown in FIGS. 53 and 62 in the direction of arrow g. At this time, as described above, the ramp 169 follows the bent-type head actuator 113 so that the ramp 169 follows FIGS.
The slide drive is performed in the direction of the arrow k from the retreat position P21 shown in FIG. 1 to the operation position P22 shown in FIGS.
Then, the bent head actuator 113 reaches the arm load / unload position P12, and the ramp 1
When 69 reaches the operation position P22 and stops,
Tip portions of a pair of upper and lower flying head sliders 116 and a pair of upper and lower suspensions 115 and a ramp arm 169
a is inserted into the head insertion hole 127 of the R-HDC (large) 121 at a position near the outer periphery of the disk 125.

(A6) Description of the drive control method of the spindle motor by the conventional large-sized removable hard disk drive At this time, the spindle motor 11 shown in FIG.
0, as shown in the drive control method of FIG.
In the (large) 101, as described in FIGS.
The R-HDC (large) 121 is inserted into the R-HDD (large) 101 from the cartridge insertion slot 105, and
After the disk 25 is mounted in the (large) 101 and the disk 25 is chucked by the spindle motor 110, the spindle motor 110 passes through a rising time Tsu and then reaches a steady rotational speed (for example, 3600 rpm, etc., hereinafter simply referred to as "constant speed"). To be described).

Therefore, in the conventional R-HDD (large) 101, the disk 125 has already been moved to the arrow D1 by the spindle motor 110 at the start of the above-described head load.
It was rotationally driven at a constant speed in the direction. Therefore, disk 1
25 is already driven to rotate at a constant speed, and the bending type head actuator 113 is moved to the arm lock position P.
11 starts rotating in the direction of arrow g, and a pair of upper and lower floating head sliders 116 and a ramp arm 169a
-From the head insertion hole 127 of the HDC (large) 121
-Was inserted into the arm load / unload position P12 in the HDC (large) 121 from the direction of arrow g.

After that, while the ramp 169 is stopped at the operating position P22, only the bent head actuator 113 is moved by the VCM 119 from the arm load / unload position P12 shown in FIGS. 53 and 63A. 54 and the landing position P which is the outermost position of the disk 125 shown in FIG.
13 is rotated in the direction of the arrow g, and at this time, a pair of upper and lower floating head sliders 116
Opening and closing in the up-down direction by a pair of upper and lower cam surfaces 176 of 9a (moving up and down with respect to the disk 125)
While landing on the landing position P13 of the disk 125 from above and below.

That is, when opening and closing the head, first, FIG.
As shown in FIG. 3A, when the bending type head actuator 113 is at the arm load / unload position P12, the sliding projections 177 of the pair of upper and lower suspensions 115 are positioned on the lower horizontal surface 172 on the upper and lower surfaces of the ramp arm 169a. I am riding on. At this time, the pair of upper and lower floating head sliders 116 at the tips of the upper and lower suspensions 115 are slightly opened in the direction of arrow o against the spring force of the upper and lower suspensions 115 in the direction of arrow n. Of the flying head slider 116 is opened at a middle interval G1 slightly larger than the thickness T1 of the disk 125.

Then, as shown in FIGS. 63 (B) and 63 (C), with the ramp 169 stopped at the operating position P22, the bending type head actuator 113
When the M119 is driven to rotate from the arm load / unload position P12 to the landing position P13 on the disk 125 in the direction of arrow g, the pair of upper and lower sliding projections 177 is
5 against the spring force in the direction of the arrow n.
After sliding up and down on the pair of upper and lower cam surfaces 176 from the up slope 173 to the high horizontal plane 174, the cam surface 176 slides down the down slope 175 and moves in the direction of the arrow g along the substantially trapezoidal movement locus g1.

As a result, the vertical distance between the pair of upper and lower flying head sliders 116 is changed from the initial intermediate distance G1 to the disk 1 distance.
After being inserted in the direction of the arrow g above and below the disk 125 while being enlarged to a large interval T2 sufficiently larger than the thickness T1 of the thickness 25, the pair of upper and lower floating head sliders are caused by the spring force of the pair of upper and lower suspensions 115 in the direction of the arrow n. While the vertical spacing of the sliders 116 is reduced, the head loading in which the pair of upper and lower flying head sliders 116 land on the landing position P13 of the disk 125 from above and below is performed. Almost simultaneously with the completion of the head loading, a pair of upper and lower slide projections 177 is provided.
Is removed from the tip of the lamp arm 169a in the direction of arrow g.

On the other hand, as described above, the pair of upper and lower floating head sliders 116 and the pair of upper and lower
5 and the lamp arm 169a are connected to the R-HDC.
(Large) from the head insertion hole 127 of the R-HDC
Since it is inserted into the arm load / unload position P12 in the (large) 121 from the direction of the arrow g, as shown in FIG. By the time you land from above and below,
An air flow AF is formed on both upper and lower surfaces of the disk 125 that has reached the steady rotational speed, along the direction of the arrow D1, which is the direction of rotation. Therefore, a pair of upper and lower flying head sliders 116 is used for the air flow A on the upper and lower surfaces of the disk 125.
The flying head slider 116 is floated on the disk F in a non-contact state with respect to the upper and lower surfaces of the disk 125.

Then, as shown in FIG. 55,
The bending type head actuator 113 is rotationally driven in the direction of arrow g by the VCM 119, and the pair of upper and lower flying head sliders 116 is moved from the landing position P13 to the position P14 in the recording area of the disk 125, and further, the position P14 in the recording area. The bent head actuator 113 is sought in the directions of arrows g and h by the VCM 119 between the outermost peripheral position P15 and the innermost peripheral position P16, and information is recorded at the position P14 in the recording area on both the upper and lower surfaces of the disk 125. And / or playback will take place. During the recording and / or reproduction of the disk 125, the pair of upper and lower flying head sliders 116 are levitated by the airflow AF generated on both the upper and lower surfaces by the constant rotation of the disk 125 in the direction of the arrow D1. Recording and / or reproduction of information is performed in a contact state.

When the bent head actuator 113 is used as the rotary head actuator, the R-
It is possible to minimize the width of the head insertion hole 127 of the HDC (large) 121 and to simplify a dynamic load / unload mechanism using a ramp 169 for opening and closing the pair of upper and lower floating head sliders 116, and to achieve high reliability. become,
A high-quality R-HDD (large) 101 can be configured.

(A7)... Description of Ejection Operation of Large Removable Hard Disk Cartridge by Conventional Large Removable Hard Disk Drive When the disk is ejected after recording and / or reproducing the disk 125, first, the bent head actuator 113 is used. Are moved from the position P14 in the recording area of the disk 125 shown in FIG. 55 to the landing position P13 shown in FIG. 54 and FIG.
After returning to the arm load / unload position P12 from the landing position P13 to the arm load / unload position P12 as shown in FIGS.
Returned to the direction.

Then, at this time, the pair of upper and lower slide projections 177 of the pair of upper and lower suspensions 115 are rotated by the above-described reverse operation at the time of head loading.
After sliding up and down a pair of upper and lower cam surfaces 176 from a slope 175 onto a high horizontal plane 174, slide down an ascending slope 173 to reach a pair of upper and lower lower horizontal planes 172 to form a substantially trapezoidal movement locus h1. Move in the direction of arrow h. As a result, a pair of upper and lower flying head sliders 1
16 is the landing position P13 of the disk 125
After being ejected outward from the disk 125 in the direction of the arrow h while being vertically separated from the top to an interval G2 that is sufficiently larger than the thickness T1 of the disk 125, the vertical interval between the pair of upper and lower floating head sliders 116 is set at the initial intermediate value. G
It is reduced to 1 and head unloading is performed.

After this head unloading, the bending type head actuator 113 is moved from the arm load / unload position P12 shown in FIGS. 53 and 62 to FIGS. 52 and 61 by the cam mechanism 118 against the tension coil spring 171. The arm is pulled back in the direction of the arrow h to the indicated arm lock position P11, and is mechanically locked at the arm load / unload position P12.

That is, the cam mechanism 1 shown in FIGS.
Worm 162 by the drive motor 161 in FIG.
-The worm wheel 163-The cam gear 165 is rotationally driven from the position shown in Fig. 55 in the direction of the arrow j via the plurality of reduction gears 164, and stopped at the position shown in Fig. 52. At this time, as shown in FIG. 54, the convex portion 166a of the cam 166 comes into contact with the cam driven portion 167 of the bent type head actuator 113, and the cam driven portion 16 is turned in the direction of arrow j to form the bent type. The head actuator 113 is pushed back in the direction of the arrow h from the arm load / unload position P12 to the arm lock position P11.
Then, as shown in FIG. 52, the bent head actuator 113 is stopped at the arm lock position P11 by the stopper 168, and almost simultaneously with this, the cam 1
The protrusion 166a of the cam 66 passes through the cam follower 167 in the direction of arrow j, and the bent head actuator 11
3 is pinched and mechanically locked.

Then, the bending type head actuator 11
When the cam mechanism 118 is returned from the arm load / unload position P12 to the arm lock position P11 in the direction of the arrow h by the cam mechanism 118, the bent head actuator 113 pushes the head actuator pressing portion 169b of the ramp 169 in the direction of the arrow h. Then, lamp 1
52 along the pair of guide rails 170 from the operation position P22 shown in FIG. 53 to the retreat position P shown in FIG.
21 is pushed back in the arrow m direction against the tension coil spring 171. At this time, the tension coil spring 1
At 71, the driving force for driving the bending type head actuator 113 in the direction of arrow g at the time of the next head loading is charged.

Then, as described above, the bending type head actuator 113 is pushed back in the direction of the arrow h to the arm lock position P11.
When the ramp 169 is pulled back in the direction of the arrow m to the retracted position P21, as shown in FIGS.
Are extracted from the R-HDC (large) head insertion opening 127 to be described later, and the R-HDC (large) 1
21 can be ejected out of the R-HDD (large) 101. Then, the spindle motor 110 is also stopped.

Then, after that, the RH shown in FIG.
When the eject button 109 of the DD (large) 101 is pressed or the like, as shown in FIG. 50, the slide plate 107 of the elevating mechanism 106 is slid in the direction of arrow f, and the cartridge holder 10 is moved by a total of four slide cams 108.
4 to the ascending position shown in FIG.
After the (large) 121 is detached upward from the spindle motor 110, the R-HDC (large) 121 is moved by the pushing mechanism (not shown) of the cartridge holder 104 through the front end opening 104 a of the cartridge holder 104 so that the cartridge of the drive main body 102 is moved. It is pushed out from the insertion opening 105 by a certain length in the direction of arrow b which is forward. Therefore, the cartridge body 1 of the R-HDC (large) 121
24, the R-HDC (large)
121 can be withdrawn from the cartridge insertion slot 105 in the direction of arrow b.

(A8) Description of Driving Torque of Conventional Large Voice Coil Motor Here, the driving torque of the conventional large voice coil motor will be described with reference to FIGS. As described above, the conventional large-sized VCM 119 has the radial portion 181a which is a radial overlap portion corresponding to the effective length of the coil 181 fixed to the bending type head actuator 113 with respect to the magnet 182. . A magnetic circuit having a magnetic flux Φ formed between the upper and lower yokes 183 and 184 is formed by the magnet 182 so as to penetrate the radial portion 181a in the vertical direction. Then, by flowing a current A1 in the forward direction or a current A2 in the reverse direction to the radial portion 181a of the coil 181 in the magnetic flux Φ of the magnetic circuit,
A thrust in the direction of arrow g or h is generated in the radial portion 181a of the coil 181. Then, a value obtained by multiplying the radius r11 between the intermediate position in the length direction of the radial portion 181a of the coil 181 and the center of the rotation center shaft 117 by the above-mentioned thrust is the driving torque of the bending type head actuator 113, and this driving torque The bending head actuator 113 is configured to be driven to rotate in the directions of arrows g and h.

Further, the bending type head actuator 113
Is substantially proportional to the square of the radius r12 between the center of the rotation center axis 117 and the center of the flying head slider 116.

The head opening / closing mechanism employed in the conventional R-HDD (large) 101 is, as described above, a cam symmetrically formed on the upper and lower surfaces of a lamp arm 169a integrally formed with the lamp 169. This is a slide cam system including a surface 176 and a slide convex portion 117 formed on a pair of upper and lower suspensions 115 of the bent head actuator 113. That is, when the bending type head actuator 113 is loaded / unloaded by the VCM 119 in the direction of the arrow g or the direction of the arrow h, the sliding convex portions 177 of the pair of upper and lower suspensions 115 are connected to the lower horizontal surface of the pair of upper and lower cam surfaces 176 of the ramp arm 169a. 1
The pair of upper and lower floating head sliders 116 is opened and closed in the vertical direction by sliding in a substantially trapezoidal shape in the arrow g1 direction or the arrow h1 direction on the upward slope 173, the high horizontal plane 174, and the downward slope 175.

Therefore, when loading / unloading the bent head actuator 113, the ramp arm 16
Friction driving torque, which is the sliding resistance of the pair of upper and lower sliding projections 177 with respect to the cam surface 176 of 9a, is generated. The friction driving torque is proportional to the product of the load and the friction coefficient of the pair of upper and lower suspensions 115 and the radius from the rotation center of the head arm 114 to the slide protrusion 177.

In the R-HDD (Large) 101 of this type, for example, a bent head actuator 113 is provided for the purpose of increasing the shock resistance when the disk 125 is not used, such as when recording and / or reproduction is interrupted. From the position P14 in the recording area shown in FIG. 55 to the arm load shown in FIG.
Return to the unload position P12 in the direction of arrow h,
A magnet latch system is adopted in which the energization of the coil 181 of the VCM 119 is cut off, and thereafter, the bending type head actuator 113 is latched by the attraction force of the coil 181 by the magnet 182.

(A9)... Description of the wiring structure of the head of the large bent head actuator of the conventional large removable hard disk drive Here, FIGS.
The wiring structure 191 for the pair of upper and lower flying head sliders 116 of the large bent head actuator 113 employed in the HDD (large) 101 will be described.
First, the external interface 1 that is attached to the drive main body 104 so as to protrude rearward from the rear end portion 104b of the drive main body 104 is attached.
The signal board 193 connected to the
The signal board 193 and the outer surface (the surface on the rear end portion 104b side of the drive main body 104) 114b of the head arm 114 of the bent type head actuator 113 are mounted horizontally inside the rear end portion 104b. A flexible printed circuit board 195 is used to connect the relay point 194 provided substantially at the intermediate portion to a state having a sufficient length so as to be bent in a substantially U-shape. Next, the relay point 194 and the coil 181 of the VCM 119 are connected by a wiring member (not shown) such as an electric wire, and the relay point 194 is connected to a pair of upper and lower floating head sliders 116 of the bent head actuator 113. Are connected by a pair of upper and lower wiring members 196 such as an electric wire and an elongated flexible printed circuit board.

Signals input / output to / from the external interface 192 are transmitted / received to / from a pair of upper and lower floating head sliders 116 through a signal board 193, a flexible printed board 195, a relay point 194, and a pair of upper and lower wiring members 196. , VCM 119 are energized.

By the way, a conventional large R-HDD (large)
In 101, as shown in FIG. 65, a pair of upper and lower wiring members 196 for transmitting and receiving signals to a pair of upper and lower flying head sliders 116 are connected to a pair of upper and lower suspensions for the head arm 114 of the large bent head actuator 113. The pair of upper and lower wiring members 196 are pulled out from the outer surfaces 115b (opposite to the rotation center axis 117 side) of the pair of upper and lower suspensions 115 so as to detour outside the bent portion 113a with the bent portion 113a. Of the head arm 114 to the outside of the outer surface 114a of the head arm 114.

(A10) Description of Conventional Large Removable Hard Disk Cartridge Here, the R-HDD (large) 1 will be described with reference to FIGS.
01 is a conventional large-capacity removable disk cartridge which is a conventional large-capacity removable hard disk cartridge (Removable-Hard Disk Cartridge).
Hereafter, it is simply referred to as R-HDC (large)) 1
21 will be described.

The R-HDC (large) 121 is a flat plate in which upper and lower shells (also referred to as upper and lower halves) 122 and 123 formed of a synthetic resin molded product such as ABS are integrally joined from above and below by screwing or welding. Box-shaped cartridge body 12
4 and an information recording disk (hereinafter simply referred to as a disk) 125 which is a removable hard disk rotatably stored in the cartridge main body 124. A center core 126 made of a ferromagnetic material is fixed to the center of the disk 125, and a center hole 126a is formed in the center of the center core 126. A head insertion hole 127, which is a horizontally long opening, is provided at a position of the cartridge body 124, which is deflected to one side of the arc-shaped front end portion 124 a, of the upper and lower shells 12.
2 and 123, a circular disk table insertion hole 128 into which a center core 126 of the disk 125 is fitted with play at substantially the center of the lower shell 123 is opened. Have been.

The R-HDC (large) 121 is
A rear end portion 124b and left and right side portions 124c and 124d which are three surfaces excluding a front end portion 124a of the cartridge main body 124.
A plurality of rib-shaped upper partition walls 129 and lower partition walls 130 formed in a circular arc shape along the circumferential direction and divided in the circumferential direction are formed on inner surfaces 122a and 123a which are upper and lower opposing surfaces of the upper and lower shells 122 and 123. The upper and lower shells 122 and 123 are integrally formed in a vertical and symmetrical shape, and the upper and lower shells 122 and 123 are integrally joined from above and below. A substantially circular disk storage chamber 131 is formed inside the partition wall 129 and the lower partition wall 130. Then, the disk 125 is rotatably and horizontally inserted into the disk storage chamber 131, and the disk storage chamber 131 is inserted.
A circular disk table insertion hole 128 is formed (opened) in the lower shell 123 at a position substantially equivalent to the center. At this time, on the inner surface 123a of the lower shell 123, a plurality of, for example, three
32 are integrally formed, the center core 126 of the disk 125 is placed and positioned on these dowels 132, and the disk 125 is positioned on the inner surface 1 of the lower shell 123.
23a, it is horizontally supported in a state of being lifted upward.

A shutter 135 made of a thin metal plate such as a stainless steel plate is horizontally arranged on the inner surface 123a of the lower shell 123 below the disk 125 with the shutter 135 traversing the disk storage chamber 131 in the front-rear direction. Have been. The shutter 135 has a disk table insertion hole opening / closing section 1 formed in a narrow, almost fan-shaped horizontal plate.
36, the front end side of the disk table insertion hole opening / closing portion 136 (the front end portion 124a side of the cartridge main body 124) is outsert-molded with a synthetic resin, and is vertically raised upright. A head insertion hole opening / closing portion 137 formed in an arc shape along the inside of the front end portion 124a, and a rear end side of the disk table insertion hole opening / closing portion 136 (the rear end portion 1 of the cartridge main body 124).
24b) and a spring engaging portion formed at a position near the proximal end 138 on one side surface 136a of the disk table insertion hole opening / closing portion 136. 139 and one side surface 136a of the disc table insertion hole opening / closing portion 136, which extends from the base end 138 to a front end side by a large distance to one side, and extends to one side, and a support point of the base end 138 described later. An opening / closing arm section 140 formed in an arc shape centered on the pin 145 is integrally pressed. The notch 14 for escape with respect to the disk table insertion hole 128 is provided substantially at the center of the other side surface 136b of the disk table insertion hole opening / closing section 136.
1 is formed, and a notch 142 for escape with respect to a filter storage portion 159 described later is also formed near the front end of the one side surface 136a.

Then, at the rear end of the disk storage chamber 131,
At positions offset from the center of the cartridge body 124 to one side, the upper and lower shells 122 and 123 constituting the outer peripheral wall of the disk storage chamber 131 and a part of the lower partition walls 129 and 130 are partially moved rearward ( (To be outside), and a spring storage chamber 144 is provided which is communicated with the disk storage chamber 131. Then, the base end 138 of the shutter 135 is rotatably inserted into a fulcrum pin 145 which is a rotation fulcrum which is integrally formed vertically on the inner surface 123a of the lower shell 123 at one side in the spring storage chamber 144. The shutter 135 is configured to be rotatable around the fulcrum pin 145 in the left and right directions of the arrows p and q. A torsion coil spring 1 having a large spring force (spring constant) is used as a shutter spring.
And a coil portion of a torsion coil spring 147 on the outer periphery of a boss-shaped spring engaging portion 146 which is integrally formed vertically on the inner surface 123a of the lower shell 123 on the other side in the spring storage chamber 144. 148 is inserted and attached from above. Then, the tip of the working end 149 of the torsion coil spring 147 and the working end 149 of the fixed end 150 which are formed in a substantially U-shape are connected to the spring engaging portions 1 of the shutter 135.
39, the tip of the fixed end 150 is brought into contact with the inside of the concave portion of the lower partition wall 130 of the lower shell 123, and the shutter 135 is moved by the spring force of the working end 149 to open the shutter shown in FIG. To the closed position shown in FIG. 69 in the direction of arrow p.

Then, a pair of escape grooves 151 formed in an arc shape centering on the fulcrum pin 145 is formed in the disk table insertion hole opening / closing portion 136 of the shutter 135 with the lower shell 1.
23 of the three dowels 132 integrally formed around the disk table insertion hole 128 on the inner surface 123a of the
One is engaged so as to escape. Incidentally, the front end portion 125a of the cartridge body 125 and the head insertion hole opening / closing portion 137 of the shutter 135 inside the front end portion 125a
5 is formed in an arc shape. Since the fulcrum pin 145 is offset from the center of the cartridge main body 124 toward one side (one side 124c side), the front end 125a of the cartridge main body 125 and the opening and closing of the head insertion hole of the shutter 135 are performed. The portion 137 is formed in an arc shape slightly inclined to the other side (to the other side portion 124d).

The opening / closing arm 140 of the shutter 135 is inserted through a recess 152 which is a notch formed in a part of the lower partition wall 130 of the lower shell 123, so that the cartridge main body 124 is located outside the disk storage chamber 131. Rear end 1
24b, and the tip 140a of the opening / closing arm 140 is attached to the cartridge body 124.
At the rear end of one side 124c, the upper and lower shells 122,
It protrudes outward from a slit 153 formed horizontally between 123. The tip 1 of the opening / closing arm 140
40a is bent horizontally upward from its opening / closing arm 140 by a substantially crank-shaped bent portion 140b, and then horizontally protrudes laterally outward from the slit 153. Also,
140b is when the shutter is closed (pushed in the p direction)
It is pressed against the inner wall 152 of the shell and serves to prevent dust from entering from outside. Then, as described with reference to FIGS. 50 and 51, the R-HDC (large) 121 is
Arrow a in the cartridge holder 104 of the (large) 101
When inserted from the direction, the shutter opening means (not shown) provided on one side of the cartridge holder 104 causes the tip 140a of the opening / closing arm section 140 to move as shown in FIG.
It is relatively driven in the direction of arrow b from the closed position shown in FIG. 9 to the open position shown in FIG. Then, the shutter 135 is turned around the fulcrum pin 145 in the arrow q direction from the closed position shown in FIG. 69 to the open position shown in FIG. 70 against the spring force of the working end 149 of the torsion coil spring 147, and The head insertion hole 127 and the disk table insertion hole 128 of the main body 124 are opened simultaneously.

As described with reference to FIG. 49, after recording and / or reproduction of the disk 125, the R-HDC (large) 1
When the shutter 21 is pulled out from the cartridge holder 104 of the R-HDD (large) 101 in the direction of arrow b, the shutter 135 is removed.
Is automatically rotated in the direction of arrow p around the fulcrum pin 145 from the open position shown in FIG. 70 to the closed position shown in FIG. The insertion hole 127 and the disk table insertion hole 128 are the head insertion hole opening / closing part 137 of the shutter 135 and the disk table insertion hole opening / closing part 1.
36 are automatically closed at the same time. Further, at this time, the concave portion 152 with the cartridge body 124 is simultaneously closed by the bent portion 140b of the shutter 135.

The rear end 1 of the cartridge body 124
At the position near both left and right corners of the lower shell 123 on the 24b side, a pair of right and left positioning holes 15 of a perfect circular shape and an elliptical shape are provided.
51, a pair of left and right positioning bosses 156 and 157 having openings 155 and 155 are integrally formed.
As described above, when the R-HDC (large) 121 is mounted in the drive main body 102 by the cartridge holder 104 in the direction of the arrow c, a pair of left and right provided in the drive main body 102 of the R-HDD (large) 101 A pair of left and right positioning holes 154 and 155 of the R-HDC (large) 121 are fitted into the positioning pins (not shown) of the R-HDC (large) 121 from above, so that the R-HDC (large) 121 is horizontally arranged in the drive main body 102. It is configured to be positioned. Also,
A write protector 158 for preventing erroneous erasure of the disk 125 is incorporated in the lower shell 123 at a position inside one of the positioning projections 156 so as to be slidable in the left-right direction.

The front end 1 of the cartridge body 124
On the side of the side 24a, opposite to the head insertion hole 127, a substantially arc-shaped filter storage chamber 159 is provided at an outer position of the disk storage chamber 131, with the upper and lower shells 122,12.
The upper and lower partitions 129 and 130 of the third partition 3 are formed so as to be separated from each other. Both ends of the filter storage chamber 159 in the arc direction are communicated with the disk storage chamber 131, and the circulation filter 160 is stored in the filter storage chamber 159. Then, when recording and / or reproducing the disc 125,
5 is rotated in the disk storage chamber 131 at a constant speed, so that the airflow is repeatedly circulated in the disk storage chamber 131, the spring storage chamber 144, and the filter storage chamber 159, so that the R-HDC (large The dust inside the R-HDC (large) 121 is adsorbed on the circulation filter 160 and collected to thereby purify the air inside the R-HDC (large) 121.

Incidentally, the conventional R-HDC (large) 121
As shown by the dashed line in FIGS. 35 and 36, the diameter D11 of the disk 125 was set to 65 mm (2.5 inches). The outer diameter of the R-HDC (large) 121 is a maximum width W11 = 69 mm, which is the maximum dimension between the left and right side parts 124c and 124d, and the maximum depth is the maximum dimension between the front and rear ends 124a and 124b. D12
= 72 mm. An arc-shaped radius R11 = 69.75 mm centered on the fulcrum pin 145 at the front end 124a of the cartridge main body 124, and the offset amount OS11 of the fulcrum pin 145 to one side of the center of the cartridge main body 124 = 5 mm, the fulcrum pin 14 of the disc table insertion hole 128
5, the depth D14 was set to 34.25 mm.

[0064]

As described with reference to FIGS. 57 to 59, the conventional large-sized VCM 119 corresponds to the effective length of the coil 181 fixed to the bending type head actuator 113 with respect to the magnet 182. It has a radial portion 181a that is a radial overlap portion. A magnetic circuit having a magnetic flux Φ formed between the upper and lower yokes 183 and 184 is formed by the magnet 182 so as to penetrate the radial portion 181a in the vertical direction. Then, the radial portion 1 of the coil 181 in the magnetic flux Φ of the magnetic circuit
The thrust in the arrow g direction or the arrow h direction is generated at the radial portion 181a of the coil 181 by flowing the current A1 in the forward direction or the current A2 in the reverse direction through 81a.
Then, a radius r1 between the intermediate position in the length direction of the radial portion 181a of the coil 181 and the center of the rotation center shaft 117
The value obtained by multiplying 1 by the above-mentioned thrust becomes the drive torque of the bending head actuator 113, and the bending torque drives the bending head actuator 113 in the directions of arrows g and h. The inertia of the bent head actuator 113 is substantially proportional to the square of the radius r12 between the center of the rotation center axis 117 and the center of the flying head slider 116.

The head opening / closing mechanism employed in the conventional R-HDD (large) 101 is, as described above, a cam symmetrically formed on the upper and lower surfaces of a lamp arm 169a integrally formed with the lamp 169. This is a slide cam system including a surface 176 and a slide convex portion 117 formed on a pair of upper and lower suspensions 115 of the bent head actuator 113. That is, when the bending type head actuator 113 is loaded / unloaded by the VCM 119 in the direction of the arrow g or the direction of the arrow h, the sliding convex portions 177 of the pair of upper and lower suspensions 115 are connected to the lower horizontal surface of the pair of upper and lower cam surfaces 176 of the ramp arm 169a. 1
The pair of upper and lower floating head sliders 116 is opened and closed in the vertical direction by sliding in a substantially trapezoidal shape in the arrow g1 direction or the arrow h1 direction on the upward slope 173, the high horizontal plane 174, and the downward slope 175. Therefore, the load /
At the time of unloading, the cam surface 17 of the ramp arm 169a
A friction drive torque, which is the slide resistance of the pair of upper and lower slide protrusions 177 with respect to the slide protrusion 6, is generated. The friction driving torque is proportional to the product of the load and the friction coefficient of the pair of upper and lower suspensions 115 and the radius from the rotation center of the head arm 114 to the slide protrusion 177. Further, in this type of R-HDD (large) 101, for example, a bent head actuator 113 is provided in FIG. 55 for the purpose of improving the shock resistance when the disk 125 is not used, such as when recording and / or reproduction is interrupted. Returning from the position P14 in the recording area shown to the arm load / unload position P12 shown in FIG.
A magnet latch system is employed in which the energization of the coil 181 is cut off, and thereafter, the bending type head actuator 113 is latched by the attractive force of the coil 181 by the magnet 182.

Here, the inventor of the present invention has proposed that the R-HDD 1
In order to reduce the size of the actuator 01, the development of a small bending type head actuator 113 was successful. If the miniaturization of the bending actuator 113 is achieved, the inertia of the bending head actuator 113 will also have the above-mentioned radius r.
Since it becomes extremely small almost in proportion to the square of 2, V
The driving torque required by the CM 118 can be extremely reduced, and the miniaturization of the R-HDD 101 is greatly welcomed. On the other hand, in order to achieve the miniaturization of the R-HDD 101, the bent head actuator 113 is moved between the lock position P1 and the arm load / unload position P2 by the arrow g because the bent head actuator 113 gets over the ramp 119. , H, the bent head actuator 113 is moved to the VCM 118 in the entire region between the lock position P1 and the innermost peripheral position P4 of the recording area P3.
It is preferable to drive in the directions of arrows g and h. But,
A pair of upper and lower suspensions 115 for the ramp 119
The friction drive torque of the slide projection 177 is large R-
Since it is approximately proportional to the first power of the radius r2 of the HDD 101, simply reducing the size of the VCM 118 makes it possible to overcome the frictional driving torque of the bending type head actuator 113 when the bending type head actuator 113 is loaded / unloaded. A new problem that the drive torque cannot be obtained occurs. Also, VCM118
If the drive torque of the head actuator 113 is small, the magnet latch force of the bending type head actuator 113 when not in use is also weakened, and sufficient impact resistance cannot be obtained. That is, the upper limit of the attraction force of the coil 181 by the magnet 182 for generating the magnet latch force is VC
Since the driving torque of M118 is specified, there arises another problem that it is difficult to sufficiently increase the magnet latch force. In particular, in the removable R-HDD 101, since the disk 125 is mounted by the L-HDC 121, the installation space of the VCM 118 in the drive main body 102 is
VCM11 compared to hard disk fixed HDD
8 is greatly limited. In addition, since the R-HDD 101 of the removable type must necessarily adopt the ramp loading method, the driving torque at the time of loading / unloading of the bending type head actuator 113 by the VCM 118 with the downsizing of the R-HDD 101 is required. There was a problem of insufficiency.

The present invention has been made in order to solve the above-mentioned problem. Even if the size of the voice coil motor is reduced due to the reduction in the size of the head actuator, the present invention is not applicable to the case where the head actuator goes over a ramp. An object of the present invention is to provide a head actuator and a disk storage device capable of obtaining a sufficient driving torque.

[0068]

According to the present invention, there is provided a head actuator for supporting a floating head slider via a suspension at a tip end of a head arm which is rotated around a rotation center axis. A voice coil motor is constituted by a coil attached to the end of the head arm opposite to the suspension side, a magnet arranged above or below the coil, and an upper and lower yoke arranged above and below these coils and magnets, In a head actuator configured to load / unload a flying head slider on a disk or a recording area by a voice coil motor, the head actuator floats within a rotation driving range around a rotation center axis of a coil in the voice coil motor. Seek the head slider within the recording area of the disc. For the required drive torque, in which a flying head slider provided with a partial driving torque increasing portion for the driving torque partially increased when loading / unloading on the disk or on the recording area. At this time, a part of the voice coil motor where the driving torque is increased is partially projected outside or inside the end of the magnet, and may be constituted by a convex portion that overlaps with the outside or inside radius part of the coil, It is preferable that the magnet is constituted by a convex portion which partially increases the thickness of the end of one yoke. According to another aspect of the present invention, there is provided a disk storage device that supports a floating head slider via a suspension at a tip end of a head arm that is rotated around a rotation center axis, and a head arm on a suspension side. Is a coil attached to the opposite end, a magnet arranged above or below the coil, a head actuator consisting of a voice coil motor constituted by upper and lower yokes arranged above and below these coils and magnets, Dynamic load for moving the flying head slider up and down against the disk against the spring force of the suspension due to the suspension going over when the flying head slider is loaded / unloaded from outside the disk onto the disk by the voice coil motor / Lamp for unloading In the disk storage device obtained above, the flying head slider is moved with respect to the driving torque required to seek the flying head slider within the recording area of the disk within the rotation driving range of the voice coil motor around the rotation center axis of the coil. When loading / unloading on the disk, a partial driving torque increasing portion is provided to partially increase the driving torque when the flying head slider crosses the ramp. At this time, a part of the voice coil motor that partially increases the driving torque may be constituted by a convex part that is partially projected outside or inside the end of the magnet and overlaps with the outside or inside round part of the coil. It is preferable that the magnet is formed by a convex portion that increases the thickness of the end of one yoke.

In the head actuator of the present invention configured as described above, the flying head slider is loaded / unloaded on the disk or the recording area by the voice coil motor.
When unloading, even if a load larger than the load of the head actuator on the disk at the time of seeking is applied, the drive torque of the head actuator is reduced by the partial drive torque increase portion provided in the voice coil motor. Can be increased temporarily. In the disk storage device of the present invention configured as described above, the floating head slider of the head actuator is loaded / loaded from outside the disk onto the disk by the voice coil motor.
When unloading, when the suspension passes over the dynamic load / unload ramp against its spring force, even if a load larger than the load applied when the head actuator seeks on the disk is applied, the voice coil motor is driven. The drive torque of the head actuator can be temporarily increased by the partial drive torque increase portion provided in the head.

[0070]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a small-sized removable hard disk drive to which the present invention is applied and a small-sized removable hard disk cartridge applied to the same will be described in the following order with reference to FIGS. (B1) ··· Explanation of the drive control method of the spindle motor (FIGS. 1 to 5) (B2) ··· Explanation of the dynamic load / unload mechanism (FIGS. 4 to 12) (B3) ··· Description of First Embodiment Regarding Drive Torque of Voice Coil Motor (FIGS. 13 to 2)
0) (B4)... Description of the second embodiment relating to driving torque of small voice coil motor (FIG. 21) (B5)... Third embodiment relating to driving torque of small voice coil motor (See FIGS. 22 and 2)
3) (B6)... Description of the first embodiment of the head wiring structure of the small bent head actuator (FIG. 24 to FIG. 24)
(B7) Description of the second embodiment of the wiring structure of the head of the small bent head actuator (FIG. 32)
(FIG. 35-FIG. 47) (B8) Description of small removable hard disk cartridge and small removable hard disk drive (FIGS. 35-47)

(B1) Description of Drive Control Method for Spindle Motor First, referring to FIGS. 1 to 5, a drive control method for an R-HDD (small) spindle motor, which will be described later, which is a disk storage device according to the present invention. Will be described. First, FIG. 2 shows a spindle motor drive control circuit SCC which is a spindle motor drive control means. The spindle motor 10 starts to be driven to rotate by a rotation command signal output from the host computer CPU to the motor driver C1. At this time, the timing of starting the rotation of the spindle motor 10 is controlled based on the current position information of the later described bending type head actuator 13 sequentially detected by the mode sensor C2 attached to the cam gear 65 of the cam mechanism 18 described later, The timing at which the spindle motor 10 is stopped is controlled based on the current position information of the bending head actuator 13 sequentially detected by the mode sensor C2.

According to the spindle motor drive control circuit SCC, the drive control of the spindle motor 10 shown in FIG. 1A can be performed. That is, as described later, when the head is loaded, the bending type head actuator 13 is moved from the arm lock position P11 shown in FIG. 8 to the arm load / unload position P12 shown in FIG. When the rotation drive is started in the direction of arrow g until the bending head actuator 13 is moved to the arm lock position P11 based on the information on the current position of the bending head actuator 13 detected by the mode sensor C2.
, The spindle motor 10 starts rotating after a lapse of a predetermined standby time Td from the moment when the rotation is started in the direction of the arrow g,
After a predetermined rise time Tsu, the spindle motor 1
0 is raised to a steady rotation speed (for example, a constant speed such as 3600 rpm). When the rotation speed of the spindle motor 10 is substantially raised to a steady rotation speed, the bending type head actuator 13 is configured to reach the arm load / unload position P12.

By adopting the drive control method of the spindle motor 10, the R-HDD (small)
In FIG. 1, the bending type head actuator 13 is moved from the arm lock position P11 shown in FIGS. 4 and 9 to the arm load / unload position P12 shown in FIGS.
Is rotated in the direction of arrow g, and the tip of a pair of upper and lower flying head sliders 16 and a pair of upper and lower suspensions, and the tip of a ramp arm 69a described later are inserted into a head insertion hole of an R-HDC (small) 21 described later. 27, the tip of the floating head slider 16 and the suspension 15 and the tip of the ramp arm 69a effectively close a part of the head insertion hole 27. 360
It will be raised to a steady rotation speed such as 0 rpm.

Then, as shown in FIG. 5 (FIG. 61 of the conventional example), the disk 25 is
When rotated at a high speed such as 00 rpm, R-HDC
(Small) Negative pressure occurs near the center of the disk in 21 and RH
The airflow AF1 that has passed through a filter (not shown) in the DD (small) 1 passes through the R-HDC (small) 21 through the disk table insertion hole 28 in the center of the lower shell 23 of the R-HDC (small).
It is sucked in 21. At this time, FIG. 4 (FIG. 6 of the conventional example)
As shown in 1), a pair of upper and lower flying head sliders 1
6 and the ramp arm 69a are outside the head insertion hole 27 of the R-HDC (small) 21 and the head insertion hole 27 is completely open, the vicinity of the center of the disk in the R-HDC (small) 21 The negative pressure generated at the time becomes weaker. Therefore,
The amount of air discharged from the head insertion hole 27 to the outside is also reduced, and the amount of outside air AF3 entering the R-HDC (small) 21 from the head insertion hole 27 is increased. As a result, dust entering the R-HDC (small) 21 together with the outside air from the head insertion hole 27 easily adheres to the surface of the disk 25 or the like.
However, in this drive control method of the spindle motor, as shown in FIG. 5, the bending type head actuator 13 is driven to rotate in the direction of arrow g from the arm lock position P11 to the arm load / unload position P12, and a pair of upper and lower floating members is lifted. The distal end of the head slider 16 and the suspension 15 and the distal end of the ramp arm 69a are inserted into the head insertion hole 27 of the R-HDC (small) 21, and these partially close the head insertion hole 27 efficiently. After that, the disk 25
R-HDC (Small)
The negative pressure generated in the vicinity of the center of the disk in 21 increases.
As a result, a large amount of airflow AF3 that has passed through the filter in the R-HDD (small) 1 enters the R-HDC (small) 21 through the disk table insertion hole 28, and the R-HDC (small).
The amount of airflow AF2 discharged from the inside through the head insertion hole 27 to the outside increases, and the head insertion hole 2
7, the amount of outside air AF3 entering the R-HDC (small) 21 can be suppressed.

Therefore, according to the R-HDD (small) 1 of the present invention, the dust sucked into the R-HDC (small) 21 causes the inner wall of the cartridge body 24 and the upper and lower recording surfaces of the disk 25 to form a pair. The phenomenon that the two surfaces and the pair of upper and lower flying head sliders 16 adhere to each other can be greatly reduced. The flying height of the flying head slider 16 becomes high, and the reproduction output signal of the head becomes small, so that it is possible to prevent the information reproduction from becoming impossible. Further, since the dust adhered to the upper surface side of the upper flying head slider 16, the flying height of the flying head slider 16 with respect to the disk 25 was reduced.
An accident in which the flying head slider 16 comes into contact with the rotating disk 25 at a constant speed can be prevented.
Then, when the flying head slider 16 is brought into contact with the disk 25, an abnormal signal called thermal asperity is detected in the reproduced output signal of the head, so that it is possible to prevent the reproduction of information from becoming impossible. Can be. In addition, a pair of upper and lower floating head sliders 1
Numeral 6 denotes a relation in which the floating head slider 16 is brought into contact with the rotating disk 25 at a constant speed to support the floating of the floating head slider 16 at a constant speed. It is also possible to prevent the head slider 16 from being excited to vibrate so that tracking is not performed and recording and / or reproduction of information is disabled. And R-HDC (small)
As the amount of dust sucked into the inside 21 increases, the pair of upper and lower floating head sliders 16
5, the head crash can be prevented beforehand, and the RH can be prevented.
The durability of DD (small) 1 can be greatly improved,
A highly reliable R-HDD (small) 1 can be realized.

FIG. 3 shows that when the disk 25 in the R-HDC (small) 21 is driven to rotate at a constant speed by the R-HDD (small) 1, the bending type head actuator 13 moves to the arm lock position P11. When waiting,
It shows the result of measuring the dust amount when the bending type head actuator 13 is waiting at the arm load / unload position P12. In addition, R-HDC
The amount of dust in the (small) 21 was represented by the ratio of the amount of dust outside the R-HDD (small) 1 to the amount of dust inside the R-HDC (small) 21. According to FIG. 3, the bending type head actuator 13 is moved to the arm lock position P11.
A large amount of dust enters the R-HDC (small) 21 when waiting in the R-HDC (small) 21 when the bending type head actuator 13 is waiting in the arm load / unload position P12. It can be seen that the amount of dust entering the air was small. As shown in FIG. 3, the amount of dust penetration increases as the rotational speed of the disk 25 increases.

According to the drive control method of the spindle motor 10, as described above, the spindle motor 1
Since the bent head actuator 13 is configured to reach the arm load / unload position P12 shown in FIG. 5 when 0 is substantially raised to the steady rotation speed, the bent head actuator 13 is moved to the arm load / unload position P12. When waiting at the / unload position P12, the disk 25 is in a state in which the disk 25 has already been started up at a steady rotational speed. Therefore, the bending type head actuator 1
When the arm 3 is in standby at the arm load / unload position P12, a large external impact is applied to the R-HDD (small) 1 due to a drop or the like, and the bending type head actuator 13 is shown in FIG. Even if the head loading is performed inadvertently rotating in the direction of arrow g from the arm load / unload position P12 to the landing position P13 shown in FIG. A soft landing can be safely performed on the airflow AF generated on both the upper and lower surfaces, and the floating head slider 16 is dropped on the disk 25 by shock, and the disk 25 and the floating head slider 16 are damaged. Can be prevented beforehand. Further, since the disk 25 has already been rotated, a stiction phenomenon in which a pair of upper and lower floating head sliders 16 loaded with heads adhere to both upper and lower surfaces of the disk 25 can be prevented. As described above, from the viewpoint of preventing dust from entering the R-HDC (small) 21 and preventing the stiction phenomenon, the spindle motor drive control circuit SCC shown in FIG.
The spindle motor 10 shown in FIG.
It is preferable to perform the drive control method described above.

(B2) ··· Dynamic load /
Description of Unloading Mechanism Next, referring to FIGS.
The dynamic load / unload mechanism used in the conventional R-HDD (large) 101 includes a bent head actuator 113, a cam mechanism 118, and a VCM 119 which are used in a conventional R-HDD (large) 101. And the same structure as that of the dynamic load / unload ramp 169 and reduced in size, the bending type head actuator 13, the cam mechanism 18, and the VC
M19 and ramp 6 for dynamic load / unload
9 are used. However, while the bending angle of the pair of upper and lower suspensions 115 with respect to the head arm 114 of the conventional large bent head actuator 113 is substantially perpendicular, the upper and lower pairs of the upper and lower suspension arms 115 of the small bent head actuator 13 are substantially perpendicular. The bending angle of the suspension 15 is obtuse.

First, as described later, the bending type head actuator 13 is moved around the rotation center axis 17 between the arm lock position P11 shown in FIG. 9 and the arm load / unload position P12 shown in FIG. The cam mechanism 18, which is driven to rotate in the h direction, includes a self-locking mechanism, which is constituted by a worm 62 and a worm wheel 63, which is driven forward and reverse by a driving motor 61, and a plurality of reduction gears by the worm wheel 63. And a cam gear 65 driven to rotate in the forward and reverse directions in the directions of arrows i and j via the reference numeral 64. The cam gear 65 and the like have a bent head actuator 13.
A mode sensor (not shown) for sequentially detecting the current position in the directions of arrows g and h.

A substantially concentric cam 66 is integrally formed on the upper surface of the cam gear 65.
Is a lower surface of the head arm 114 of the bending type head actuator 13 and is configured to drive a cam follower 67 provided integrally at a substantially intermediate portion between the tip end 14a and the rotation center shaft 17. The cam 66 has a protrusion 66a protruding in the direction of arrow j toward the cam follower 67.
And an outer peripheral surface 16 extending from the convex portion 66a in the direction of arrow i.
b and a notch 66c formed on the side of the protrusion 66a in the direction of the arrow j, and the protrusion 66a and the outer peripheral surface 66b are formed as a driving portion of the cam follower 67, and the notch is formed. Reference numeral 66c is an escape space for the cam follower 67. A stopper 68 for positioning the bending type head actuator 13 at the arm lock position P11 shown in FIG. 9 is vertically fixed to the lower surface of the head arm 14 and a stopper pin 68a is formed on the bottom of the drive main body 2 in an arc shape. A guide hole 86b for guiding the stopper pin 68a is formed by an end 68c on the arrow h direction side. The guide hole 68
b is formed in an arc shape centering on the rotation center axis 17.

The ramp 69 is guided by a pair of slide guides 70 mounted on the bottom of the drive main body 2 and is directed in the directions of arrows k and m substantially along the moving mechanism of the pair of upper and lower floating head sliders 16. It is configured to be slidable between a retracted position P21 shown in FIG. 9 and an operating position P22 shown in FIG. A tension coil spring 71, which is a slide urging means, is provided between the ramp 69 and the drive main body 2, and the tension coil spring 71 causes the ramp 69 to move from the retracted position P21 to the operating position P22 with an arrow k.
The slide is biased in the direction.

The ramp 69 is formed of a synthetic resin or the like, and a pair of upper and lower floating head sliders 16 of the bending type head actuator 13 are mounted on the upper end of the ramp 69 in the direction of arrow k. A ramp arm 69a for opening and closing in the vertical direction by a cooperative action with the spring force of the pair of suspensions 15 is integrally formed.
The ramp arm 69a extends from the ramp 69 in the direction of the arrow g. The ramp arm 69a is horizontally inserted between the distal ends of the pair of upper and lower suspensions 15 of the bent head actuator 13. Have been. The ramp arm 69a is formed in an arc shape so as to substantially follow the rotation locus of the pair of upper and lower flying head sliders 16 in the directions of arrows g and h, and the radius of rotation of the ramp arm 69a around the rotation center axis 17 is provided. r1 is configured to be smaller than a rotation radius r2 around the rotation center axis 17 of the pair of upper and lower flying head sliders 16.

A head actuator pressing portion 69 b integrally formed on the upper end of the ramp 69 in the direction of the arrow m is brought into contact with the outer surface 14 e of the head arm 14 of the bent head actuator 13 from the direction of the arrow k. The biasing force of the tension coil spring 71 to slide the ramp 69 in the direction of the arrow k is applied to the bent head actuator 1 via the head actuator pressing portion 69b.
3, the bending type head actuator 13
Is configured to be rotationally urged in the direction of arrow g by the spring force of the tension coil spring 71. A ramp 69 is provided on the bottom of the drive body 2 in the operating position P22.
The stopper 69c which stops at is fixed.

The cam mechanism 18, the ramp 69 and the tension coil spring 71 are configured as described above. First, the bending type head actuator 13 is driven to rotate in the direction of the arrow h to the arm lock position P11 shown in FIG. When locked, the cam gear 65 is rotated by the drive motor 61 of the cam mechanism 18 through the worm 62-the worm wheel 63-the plurality of reduction gears 64 from the position shown in FIG. It is driven and stopped. Then, the convex portion 66 a of the cam 66 causes the cam follower 67 of the bending type head actuator 13 to move.
Is pushed in the direction of arrow j, and the bending type head actuator 13 rotates in the direction of arrow h from the arm load / unload position P12 shown in FIG. 10 to the arm lock position P11 shown in FIG. And is stopped by the stopper 68. And
Almost at the same time when the bending type head actuator 13 is stopped by the stopper 68, the convex portion 66a of the cam 66 escapes in the direction of the arrow j with respect to the cam follower 67, and the cam follower 6
7 is regulated by the outer peripheral surface 66b of the cam 66, and the bent head actuator 13 is
And the outer peripheral surface 66b of the cam 66 is mechanically sandwiched between the arm 66 and the arm 66 at the arm lock position P11.

Then, the bending type head actuator 13
Is rotated in the direction of arrow h from the arm load / unload position P12 to the arm lock position P11, the head actuator pressing portion 69b of the ramp 69 is rotated.
Is the arrow m by the bending type head actuator 13.
In this direction, the ramp 69 is slid along the pair of slide guides 70 from the operating position P22 shown in FIG. 10 to the retracted position P21 shown in FIG. Then, the tension coil spring 71 is pulled in the direction of arrow m by the ramp 69, and the tension coil spring 71
Then, a driving force for rotating the bending type head actuator 13 in the direction of arrow g is charged. The arm lock position P11 and the retreat position P2
In FIG. 1, as shown in FIGS. 4 and 9, the distal end portions of a pair of upper and lower suspensions 15 of the bending type head actuator 13, a pair of upper and lower flying head sliders 16, and a ramp arm 69 a are connected to an R-HDC (small) described later. The head 21 is drawn out of the head insertion hole 27.

Next, when the bending type head actuator 13 is driven to rotate from the arm lock position P11 shown in FIG. 9 to the arm load / unload position P12 shown in FIG. The cam gear 65 is rotated in the direction of the arrow i from the position shown in FIG. 9 to the position shown in FIG. Then, as shown in FIG. 10, first, the cam follower 67 of the bending type head actuator 13 relatively rides on the protrusion 66a from the outer peripheral surface 66b of the cam 66. As the cam 66 continues to rotate in the direction of the arrow i, the driving force charged in the tension coil spring 71 causes the ramp 69 to start sliding from the retracted position P21 in the direction of the arrow k. The bending type head actuator 13 is rotationally driven in the direction of arrow g via the pressing portion 69b.

Accordingly, the cam gear 65 is moved by the drive motor 61 from the position shown in FIG. 9 to the position shown in FIG.
When the bending type head actuator 13 is driven to rotate in the direction shown in FIG.
In the R-HDC (small) 21 shown in FIG. 10, the arm 25 is rotated in an arrow g direction from an arm lock position P11 shown in FIG. Then, the ramp 69 is slid in the direction of arrow k from the retracted position P21 shown in FIG. 9 to the operating position P22 shown in FIG.
At 22, it comes into contact with the stopper 69 c and stops. Then, the head actuator pressing portion 6 integrated with the ramp 69
9b is also stopped at the position shown in FIG. 10, and at the time of head loading described later, the bending type head actuator 13 is separated from the head actuator pressing portion 69b and an arrow g
It is driven to rotate in the direction. Then, as shown in FIGS. 5 and 10, the bending type head actuator 13 and the ramp 69 are moved to the arm load / unload position P.
12 and the operating position P22, the tip of the pair of upper and lower suspensions 15, the pair of upper and lower flying head sliders 16, and the tip of the ramp arm 69a are inserted into the head insertion hole 27 of the R-HDC (small) 21 described later.
And stopped at a position near the outer periphery of the disk 25.

That is, the bending type head actuator 13
Is the arm load / unload position P1 from the arm lock position P11 by the tension coil spring 71.
2, the tension coil spring 71 is separated from the bent head actuator 13 at the moment when the bent head actuator 13 reaches the arm load / unload position P12. Then, after this, the cam gear 65 is
11 is continuously driven to rotate to the position shown in FIG.
The third cam follower 67 can move in and out of the notch 66c of the cam 66 in the directions of arrows g and h, which are outside the front side of the cam 66.

The driving motor 6 in the cam mechanism 18
When the cam gear 65 is rotated from the position shown in FIG. 11 in the direction of arrow j by the worm 62, the worm wheel 63, and the plurality of reduction gears 64, and stopped at the position shown in FIG. As shown in FIG.
6a is the cam follower 6 of the bending type head actuator 13.
7, the cam follower 67 is rotated in the direction of arrow j, and the bent head actuator 13 is pushed back from the arm load / unload position P12 to the arm lock position P11 in the direction of arrow h. And
As shown in FIG.
And at about the same time, the projection 66a of the cam 66
Slips through the cam follower 67 in the direction of arrow j, and the bending type head actuator 13 is sandwiched between the outer peripheral surface 66b of the cam 66 and the stopper 68 to be mechanically locked.

Next, the operation of head loading / unloading by the dynamic loading / unloading mechanism will be described.

First, at the time of head loading, the R-HDD
After the mounting of the R-HDC (small) 21 on the (small) 1 and the recording and / or reproducing command signal from the host computer or the like, the cam mechanism 18 and the tension coil spring 71 of the ramp 69 allow the bending type head actuator. 13
R-HD shown in FIGS. 4 and 9 around the rotation center axis 17.
It is rotated in the direction of arrow g from the arm lock position P11 outside the C (small) 21 to the arm load / unload position P12 shown in FIGS. At this time, as described above, the ramp 69 is slid in the direction of arrow k from the retreat position P21 shown in FIGS. 4 and 9 to the operation position P22 shown in FIGS. And the lamp 69
Is brought into contact with the stopper 69c and is stopped at the operation position P22. Then, the bending type head actuator 13 reaches the arm load / unload position P12, and the ramp 69 moves to the operation position P22.
At the stop, the tip of the pair of upper and lower flying head sliders 16 and the pair of upper and lower suspensions 15 and the ramp arm 69a are positioned near the outer periphery of the disk 25 in the head insertion hole 27 of the R-HDC (small) 21. Inserted into position.

Then, with the ramp 69 stopped at the operating position P22, only the bent head actuator 13 is moved by the VCM 19 to the arm load / unload position P1 shown in FIGS. 5 and 6A.
2 to the landing position P13, which is the outermost position of the disk 25 shown in FIG. 6B and FIG. 10, is rotated in the direction of the arrow g. The disc 25 is landed from above and below to a landing position P13 of the disk 25 while being opened and closed by a pair of upper and lower cam surfaces 76 in the vertical direction.

That is, when opening and closing the head, first, FIG.
As shown in FIG.
When the arm 3 is in the arm load / unload position P12, the sliding projections 77 of the pair of upper and lower suspensions 15 are connected to the lower horizontal surfaces 7 of the upper and lower surfaces of the ramp arm 69a.
I'm on top of 2. At this time, the pair of upper and lower floating head sliders 16 at the tips of the pair of upper and lower suspensions 15 are moved by arrows n of the pair of upper and lower suspensions 15.
Is slightly opened in the direction of arrow o against the spring force of
The vertical interval between the pair of upper and lower flying head sliders 16 is opened at an intermediate interval G1 slightly larger than the thickness T1 of the disk 25.

Then, as shown in FIGS. 6B and 6C, with the ramp 69 stopped at the operating position P22, the bending type head actuator 13 is
When the pair of upper and lower slide projections 77 is rotated in the direction of arrow g from the arm load / unload position P12 to the landing position P13 on the disk 25, the pair of upper and lower slide projections 77 resist spring force in the direction of arrow n of the upper and lower suspensions 15. Then, after sliding up and down the pair of upper and lower cam surfaces 76 of the ramp arm 69a from the up slope 73 to the high horizontal plane 74, it slides down the down slope 175 in the direction of the arrow g along the substantially trapezoidal movement locus g1. Moving.

As a result, the vertical interval between the pair of upper and lower flying head sliders 16 is increased from the initial intermediate interval G1 to the disk 25.
After being inserted from above and below the disk 25 in the direction of arrow g while being enlarged to a large interval T2 sufficiently larger than the thickness T1 of
Due to the spring force of the pair of upper and lower suspensions 15 in the direction of arrow n, the vertical spacing between the pair of upper and lower floating head sliders 16 is reduced, and the pair of upper and lower floating head sliders 16 is landed on the landing position P13 of the disk 25 from above and below. Head loading is performed. Almost simultaneously with the completion of the head loading, the pair of upper and lower sliding projections 77 is
9a is removed in the direction of arrow g from the tip of 9a.

On the other hand, as described above, the pair of upper and lower floating head sliders 16 and the pair of upper and lower
5 and the lamp arm 69a are connected to the R-HDC.
(Small) From the head insertion hole 27 of the R-HDC
(Small) Arm load / unload position P in 21
12, the pair of upper and lower flying head actuators 16 is moved to the landing position P1 of the disk 25 as shown in FIG.
At the time when the disc 25 is landed from above and below, an airflow AF along the direction of the arrow D1, which is the direction of rotation, has already been formed on both the upper and lower surfaces of the disk 25 that has reached the steady rotational speed. Therefore, a pair of upper and lower floating head sliders 1
6 is soft-landed on the air flow AF on both the upper and lower surfaces of the disk 25, and these floating head sliders 16
Is floated on the upper and lower surfaces of the disk 25 in a non-contact state.

Then, as shown in FIGS. 7 and 12, the bending type head actuator 13 is
Is rotated in the direction of arrow g, and the pair of upper and lower flying head sliders 16 is moved to the landing position P13.
Is moved into the position P14 in the recording area of the disk 25, and further, the bent head actuator 13 is moved by the VCM 19 between the outermost position P15 and the innermost position P16 in the position P14 in the recording area by the arrows G and h. Then, information is recorded and / or reproduced at the position P14 in the recording area on both the upper and lower surfaces of the disk 25. During the recording and / or reproduction of the disk 25, the pair of upper and lower flying head sliders 16 causes the airflow AF generated on both upper and lower surfaces thereof by the constant rotation of the disk 25 in the direction of arrow D1.
And record and / or reproduce information in a non-contact state.

Next, when the head is unloaded after recording and / or reproduction of the disk 25, first, the bent head actuator 13 is moved by the VCM 19 from the position P14 in the recording area of the disk 25 shown in FIG. ) And the landing position P13 shown in FIG.
After returning to the arm h / unload position P12 from the landing position P13 to the arm load / unload position P12 as shown in FIGS.

Then, at this time, the pair of upper and lower slide projections 77 of the upper and lower suspensions 15 move down the pair of upper and lower cam surfaces 76 of the ramp arm 69a by a reverse operation at the time of the head loading described above. After sliding on 74, it slides down the up slope 73, and moves in the direction of arrow h along a substantially trapezoidal movement locus h 1 so as to reach a pair of upper and lower lower horizontal surfaces 72. As a result, the pair of upper and lower flying head sliders 16
5 from the landing position P13
After being ejected in the direction of arrow h to the outside of the disk 25 while being pulled up and down to an interval G2 that is sufficiently larger than the thickness T1, the pair of upper and lower floating head sliders 16
Is reduced to the initial middle interval G1, and head unloading is performed.

After this head unloading, the bending type head actuator 13 is moved by the cam mechanism 18 against the tension coil spring 71 from the arm load / unload position P12 shown in FIGS. 5 and 6 to FIGS.
And is mechanically locked at the arm load / unload position P12.

(B3) Description of First Embodiment Regarding Driving Torque of Small Voice Coil Motor Next, referring to FIGS. 13 to 20, a first embodiment relating to the driving torque of a small VCM 19 will be described. explain.

First, the small-sized bent head actuator 13 used in the R-HDD (small) described later is the large-sized bent head actuator used in the conventional large-sized R-HDD (large) 101 described above. 113, a head arm 14 and a tip 14a of the head arm 14.
A pair of upper and lower suspension heads 15 bent at a predetermined angle (obtuse angle) up and down and fixed vertically symmetrically, and a pair of upper and lower flying head sliders 16 attached to the ends of the upper and lower suspensions 15 so as to be vertically opposed to each other. The voice coil motor VCM 19 rotates around the rotation center axis 17 in the directions of arrows g and h.

The VCM 19 has a coil 81 fixed to the end of the head arm 14 on the side opposite to the suspension 15 side, and a VCM 19 horizontally on the bottom of the drive main body 2 of the R-HDD (small) 1 described later. Attached magnet 82
And upper and lower yokes 83 and 84.
The coil 81 has a substantially fan-shaped and flat air-core coil shape in which the inner end, which is the end on the rotation center shaft 17 side, has a small width, and the outer end on the opposite side gradually increases. The coil 81 is connected to the tip 14a of the head arm 14.
The pair of left and right inner wings 14d, which are formed integrally with the end 14c on the opposite side from the left side, are fitted horizontally (at right angles to the rotation center axis 17) between a pair of left and right inner wings 14d. The coil 81 is horizontally fixed to the head arm 14 by filling the resin layer 85 by outsert molding or the like.

The magnet 82 is a flat plate, and
The upper and lower yokes 83 and 84 are formed of a ferromagnetic member such as a sheet metal. The magnet 82 is horizontally fixed to the lower surface of the upper yoke 83. Two positioning concave portions 83a are formed on two orthogonal sides of the upper yoke 83 formed substantially in a T-shape. A hole 83b and a screw insertion hole 83c are formed. Further, the lower yoke 84 is provided with two vertical walls 84a which are vertically raised on two orthogonal sides, and a positioning projection 84b is provided substantially at the center of the upper end portion of these vertical walls 84a. Is formed. The two corners of the lower yoke 84 are provided with positioning pin fitting holes 84.
c and a screw insertion hole 84d are formed.

A positioning pin 86 is vertically fixed on the bottom of the drive main body 2, and a screw fastening hole 86a is formed at the center of the upper end of the positioning pin 86. The lower yoke 84 is inserted from above into the positioning pins 86 through the positioning pin fitting holes 84c and fitted therein, and the lower yoke 84 is screwed into the screw insertion holes 84d from above by the set screw 87 from the bottom of the drive main body 2. It is fixed horizontally on top. And the upper yoke 83
With the magnet 82 facing downward, the lower yoke 84
The upper yoke 83 is horizontally placed on the lower yoke 84 by being horizontally mounted on the two vertical walls 84a of the above and fitting the two positioning recesses 84a into the two positioning projections 84b from above. Is positioned. The rotation center shaft fitting hole 83b of the upper yoke 83 is fitted into the upper end of the rotation center shaft 17 of the head arm 14 from above, and the set screw 88 inserted from above into the screw insertion hole 83c is inserted into the positioning pin 86. The VCM 19 is horizontally assembled on the bottom of the drive main body 2 by being fastened to the screw fastening hole 86a at the center of the upper end.

The V thus assembled
The CMs 19 are slightly between the lower surface of the magnet 82 and the upper surface of the horizontal coil 81 which are horizontally fixed to the lower surface of the upper yoke 83, and between the lower surface of the coil 81 and the upper surface of the lower yoke 84, respectively. A gap 89, which is a simple gap, is formed. The coil 81 is located at the end in the direction of the arrow h, and is a radial portion 81 that is a radial overlap portion corresponding to an effective length portion for the magnet 82.
a. A magnetic circuit having a magnetic flux Φ formed between the upper and lower yokes 83 and 84 is formed so that the magnet 82 penetrates the radial portion 81a of the coil 81 in the vertical direction. Then, by applying the current A1 in the forward direction or the current A2 in the reverse direction to the radial portion 81a of the coil 81 in the magnetic flux Φ of the magnetic circuit, the bending type head actuator 13 is moved in the radial portion 81a of the coil 81. A thrust is generated around the rotation center axis 17 to be driven to rotate in the direction of arrow g or h.

Then, as shown in FIGS. 14 and 16,
When the bending type head actuator 13 is returned to the arm lock position P11 in the direction of the arrow h by the cam mechanism 18, the radial portion 81a of the end of the coil 81 in the direction of the arrow h in the VCM 19 is the end of the magnet 82 in the direction of the arrow h. It is detached from the portion 82a in the direction of arrow h. Therefore, in a state where the bending type head actuator 13 is waiting at the arm lock position P11, this VCM
The thrust of the bending type head actuator 13 in the direction of arrow g by the arrow 19 is hardly generated, and the bending type head actuator 13 is moved from the arm lock position P11 to the arm load / unload position P12 by the cam mechanism 18.
When the bent head actuator 13 reaches the arm load / unload position P12 by being mechanically driven to rotate in the direction of the arrow g, the radial portion 81a of the coil 81 in the VCM 19 as shown in FIGS. Is overlapped for the first time with the end 82 a of the magnet 82 in the direction of the arrow h, so that the VCM 19 can drive the bending type head actuator 13.

Therefore, the bending type head actuator 13
Reaches the arm load / unload position P12,
In the standby state, the current A1 or the current A2 is applied to the radial portion 81a of the coil 81 of the VCM 19 to generate a thrust in the arrow g direction or the arrow h direction in the bending type head actuator 13 to cause this bending. The mold head actuator 13 is configured to be rotatable in an arrow g direction or an arrow h direction between an arm load / unload position P12 and an innermost position P16 of the position P14 in the recording area.

As shown in FIG. 14, the value obtained by multiplying the radius r11 between the intermediate position in the longitudinal direction of the radial portion 81a of the coil 81 and the center of the rotation center shaft 17 by the above-mentioned thrust is the bending type head actuator. 13 drive torque,
With this driving torque, the bending type head actuator 1
3 is configured to be driven to rotate in the directions of arrows g and h. Further, the inertia of the bent head actuator 13 is substantially proportional to the square of the radius r12 between the center of the rotation center axis 17 and the center of the flying head slider 16.

By the way, the bending type head actuator 1
3, head load with VCM 19 and ramp 69 /
In the R-HDD (small) 1 with a small unload mechanism,
Due to the decrease in the driving torque due to the downsizing of the VCM 19, the pair of upper and lower cam surfaces 76 of the ramp arm 69a can be used during the head loading / unloading of the bending head actuator 13.
The friction drive torque, which is the slide resistance of the slide projection 77 of the pair of upper and lower suspensions 15 with respect to the
It is feared that the driving torque of No. 19 cannot be overcome. Therefore, in the first embodiment of the VCM 19, the VCM 19 is configured to be small in size and to obtain a driving torque capable of sufficiently overcoming the friction torque.

That is, the downsized VCM 19 in the first embodiment is different from the bent-type head actuator 1 in the first embodiment.
3, the arm load / unload of the bent head actuator 13 in the movement area in the directions of the arrows g and h between the arm load / unload position P12 and the innermost position P16 of the position P14 in the recording area. A drive torque increasing portion 90 for partially increasing the drive torque only in the movement area between the position P12 and the landing position P13 is provided. The drive torque increasing portion 90 in the first embodiment is
A protrusion 82b is partially formed integrally with an outer peripheral portion of an end 82a in the direction of the arrow h of the magnet 82 formed substantially in a fan shape about the rotation center axis 19, and the magnet 8
The width of the second end 82a in the radial direction about the rotation center axis 19 is partially enlarged.

According to the VCM 19 configured as described above, as shown in FIGS. 17 and 18, the end 82a of the magnet 82 in the direction of the arrow h is connected to the end 82a and to the outside of the end 82a. The wide effective width portion 82c that constitutes the effective width portion in the radial direction composed of the projected portion 82b can be partially formed. When the bending type head actuator 13 is on standby at the arm load / unload position P12, the end of the coil 81 in the direction of arrow h as shown by the hatched dotted line in FIG. The effective length portion 81c having a longer length constituting the effective length portion in the radial direction composed of the outer corner portion 81b continued outside the radial direction portion 81a can overlap the effective width portion 82c of the magnet 82.

As a result, as shown in FIG. 16, when the bending type head actuator 13 is on standby at the arm load / unload position P12, the current A1 or the current A2 is applied to the radial portion 81a of the coil 81 to cause an arrow. Coil 8 for generating thrust in g direction or arrow h direction
Effective length L in the radial direction for one magnet 82
11 from the length L12 of the conventional radial portion 81a,
L11 = L12 + L which is the length obtained by adding the length L13 of the outer corner portion to the length L12 of the radial portion 81a.
It was able to expand to 13. Then, in proportion to the amount of expansion of the effective length L11 of the coil 81, the driving torque, which is the thrust of the bending type head actuator 13 in the direction of arrow g or h, can be increased.

Therefore, according to this small VCM 19,
As shown in FIGS. 16 and 17, the bending type head actuator 13 is moved to the arm load / unload position P1.
Arrows g and h until 2 and landing position P13
When performing the above-described head loading / unloading by rotating in the direction, the friction driving torque, which is the sliding resistance of the pair of upper and lower suspensions 15 of the sliding projections 77 with respect to the pair of upper and lower cam surfaces 76 of the ramp arm 69a. Thus, it is possible to obtain a torque that can be sufficiently overcome.
That is, as shown in FIGS. 16 and 17, between the arm load / unload position P12 and the landing position P13, the driving torque is increased partially by the driving torque increasing portion 90, and the pair of upper and lower cam surfaces 76 is moved upward and downward. The bending type head actuator 13 is moved to the arm load / unload position P1 by a large driving torque that can overcome the friction driving torque of the slide projection 77.
2 and the landing position P13 can be rotationally driven in the directions of arrows g and h.

At the time of head loading, when the bending type head actuator 13 reaches the landing position P13 from the arm loading / unloading position P12, as described with reference to FIG. The portion 77 is separated from the pair of upper and lower cam surfaces 76 in the direction of arrow g, and
Is removed, and the bending type head actuator 13 is rotated only by inertia. On the other hand, at the time of head loading, when the bending type head actuator 13 reaches the landing position P13 from the arm loading / unloading position P12, as shown in FIG. 19, the outer corner portion 81b of the effective length portion 81c of the coil 81 becomes Arrows g and h of the bending type head actuator 13 between the landing position P13 and the innermost peripheral position P16 of the position P14 in the recording area are removed from the convex portion 82b of the effective width portion 82c of the magnet 82 in the direction of arrow g. Since the driving torque in the direction is driven only by the thrust generated by only the radial portion 81a of the effective length portion 81c of the coil 81, no harmful exciting force is generated. That is, if the outer radius portion 81b of the coil 81 overlaps the magnet 82 during tracking, vibration due to disturbance of thrust occurs. However, since such a situation can be maintained and a stable thrust can be maintained, high-precision tracking is achieved. Can be performed.

However, the bending type head actuator 13
In the rotation range between the landing position P13 and the innermost peripheral position P16 of the recording area position P14, the bending head actuator 13 is rotated only by inertia, so that the bending head actuator 13 is driven by a small amount. It can be lightly rotated in the directions of arrows g and h by the torque. Thereby, VCM1
9 and a pair of upper and lower cam surfaces 76 while reducing the size and weight.
Arm load / unload position P12 and landing position P14 where a friction drive torque is generated by the slide resistance of the pair of upper and lower slide projections 77 with respect to
In between, an effective VCM 19 that can generate a large drive torque that can overcome the friction drive torque can be realized.

The effective length L1 of the coil 81 with respect to the magnet 82 when the bending type head actuator 13 is on standby at the arm load / unload position P12.
1 can be increased (L11 = L12 + L13), so that the shock resistance of the R-HDD (small) 1 during standby, such as during standby after recording and / or reproduction of the disk 25, is intended to be improved during standby. When the motor 13 is in the arm loading / unloading position P12, the energization of the coil 81 is cut off, and a magnet latch method is employed in which the bending type head actuator 13 is latched by the attraction force of the coil 81 by the magnet 82. With the small VCM 19, the large magnet latch force of the bending type head actuator 13 can be obtained.

FIG. 20 shows a rotation angle diagram of the bending type head actuator with respect to the driving torque of the small VCM 19 described in the first embodiment of the present invention.
The horizontal axis indicates the rotation angle of the coil, and the vertical axis indicates the driving torque constant. The lower part of FIG.
7 so that the position of the flying head slider 16 relative to the disk 25 can be easily determined.
And a recording and / or reproducing area of the disk 25.

Then, as is apparent from FIG.
In the conventional VCM, the driving torque in the turning angle line over the ramp 69 is significantly reduced, whereas in the small VCM 19 of the present invention, the driving torque in the turning angle line over the ramp 69 is decreased. It can be seen that the driving torque is maximized within the rotation angle line over the ramp 69.

(B4) Description of Second Embodiment Regarding Driving Torque of Small Voice Coil Motor Next, referring to FIG. 21, a second embodiment of the VCM 19 of the small bending head actuator 13 will be described. To explain, the partial drive torque increasing portion 90 in this case
Is formed by an inner convex portion 82 (shaded portion) integrally formed inside an end portion 82a in the direction of the arrow h of the magnet 82 formed in a fan shape around the rotation center axis 17. When the coil 81 is on standby at the arm load / unload position P12, the coil 81
The inner corner portion 81d of the radial portion 81a of the
It is configured to overlap on 2d.

Therefore, also in the second embodiment, as in the first embodiment, when the bending type head actuator 13 is on standby in the arm load / unload position P12, the magnet in the VCM 19 is not used. The effective length L11 of the coil 81 with respect to the inner portion 82c is set to the length L12 of the radial portion 81a.
L11 = L12 + L14, which is the sum of the length L14, and the arrow g direction in the small stroke S12 that is the initial range in which the bending type head actuator 13 is rotationally driven from the lock position P1 toward the arrow g direction. Can be temporarily increased. In addition,
At this time, the outer convex portion 82b shown in FIG. 16 and the inner convex portion 82d shown in FIG. 21 may be integrally formed at two places, that is, outside and inside of the end portion 82a of the magnet 82, into a substantially T-shape. it can.

(B5) Description of Third Embodiment Regarding Driving Torque of Small Voice Coil Motor Next, referring to FIG. 22, a third embodiment of the small VCM 19 will be described. The partial drive torque increasing portion 90 is formed on the lower surface 82e of the end 82c on the arrow h direction side of the fan 82 formed in a fan shape around the rotation center axis 17 in the thickness direction as indicated by oblique lines. Of the bent-type head actuator 1
Arm load / unload position P12 and landing position P13 in the rotation stroke S11 between the arm load / unload position P12 of No. 3 and the innermost position P16 of the position P14 in the recording area.
The width G11 of the gap 89 between the magnet 82 and the coil 81 in the range of the small stroke S12 between Gap 89 within the range of stroke S13
Is smaller than the width G12.

In the third embodiment, the width G11 of the gap 89 in the small stroke S12 is configured to be smaller than the width G12 of the gap 89 in the stroke S13. Using the fact that the leakage magnetic flux of Φ is smaller than the leakage magnetic flux of the magnetic flux Φ in the large stroke S13, the bending type head actuator 13 is moved between the arm load / unload position P12 and the landing position P13 in the directions of arrows g and h. The driving torque at the time of rotational driving can be partially increased. In this case, FIG.
As shown by the dashed line, the lower surface 82e of the magnet 82 is formed flat and the upper surface 84a of the lower yoke 84 is
By forming f, the width G11 'of the gap 89 in the range of the small stroke S12 between the coil 81 and the lower yoke 84 may be smaller than the gap G12' in the range of another stroke S13.

(B6) Description of First Embodiment of Head Wiring Structure of Small Bend-Type Head Actuator Next, FIG. 24 to FIG. One embodiment will be described.

First, the small bent head actuator 13 is provided with a base end 15 of a pair of upper and lower suspensions 15.
a pair of upper and lower base plates 15b having a large thickness are fixed to the upper and lower opposing surfaces by caulking, respectively, and the upper and lower base plates 15b are attached to the tip 14a of the head arm 14.
Are bent at a predetermined angle above and below and are fixed in a vertically parallel manner. At this time, a caulking boss 15c integrally formed on the upper and lower opposing surfaces of the pair of upper and lower base plates 15b is integrally formed.
The upper and lower suspensions 15 are attached to the upper end 14a of the head arm 14 by press-fitting the upper and lower ends thereof into upper and lower ends of a caulking hole 14b formed through the upper and lower ends of the distal end 14a of the head arm 14. They are fixed vertically symmetrically to form a bent portion 13a of the bent head actuator 13.

A bifurcated flexure 15d is integrally formed at the tip of the pair of upper and lower suspensions 15, and a gimbal 15e is supported inside the tip of the flexure 15d. A pair of upper and lower flying head sliders 16 is fixed vertically and symmetrically by bonding or the like. The pair of upper and lower suspensions 15 are bent symmetrically from the base end 15a to the center of the head arm 14 in the plate thickness direction from the base end 15a to the flexure 15d which is the end.

In the first embodiment of the head wiring structure 91, as shown in FIG. 24, the bent head actuator 13 is returned to the arm lock position P11 in the direction of arrow h and locked, and The external interface in the conventional R-HDD (large) 101 described with reference to FIG. 49 at a position on the rear side of the bending head actuator 13 in the direction of arrow a and lower than the bending head actuator 13 near the rotation center axis 17. As in 192, the signal board 92 connected to a small external interface (not shown) is horizontally arranged.

Then, the bending type head actuator 13
Of the head arm 14 and the rotation center axis 1
7 between the relay point 93 and the signal substrate 92 set on the outer surface (the surface on the side of the arrow a) 14e of the head arm 14 between the signal line 92 and the wide flexible printed circuit board 94 in a substantially U-shaped manner. , Are connected in a state where there is room for the length. The movable end 94a of the flexible printed board 94 on the head arm 14 side is fixed to the outer side surface 14e of the head arm 14 with an adhesive or the like, and a wiring branched from near the movable end 94a of the flexible printed board 94. The portion 94b is connected to the coil 81 of the VCM 18. The relay point 94 and a pair of upper and lower floating head sliders 16 of the bending type head actuator 13 are connected by a pair of upper and lower elongated flexible printed boards 95 as a pair of upper and lower wiring members.

The pair of upper and lower floating head sliders 16 of the pair of upper and lower flexible printed circuit boards 95 are provided.
The side is formed in a bifurcated portion 95a that is bifurcated into right and left. Therefore, first, the forked portions 95a of the pair of upper and lower flexible printed circuit boards 95 are bonded along the upper and lower opposing surfaces 15d of the pair of upper and lower suspensions 15, and the like. Wiring to the tip side, these forked parts 95
a) Each tip 95b of a is a bifurcated flexure 15
A connection terminal 16 is disposed at the end of the floating head slider 16 on the side of the head chip 16a, bypassing the outside of the pair of upper and lower floating head sliders 16 along d.
b, the tip 95b of the forked portion 95a of the flexible printed board 95 is connected by soldering or the like. In this case, the forked portion 95a is wired so as to pass through the left and right sides of a pair of upper and lower sliding projections 77 formed on upper and lower opposing surfaces in a substantially intermediate portion of a pair of upper and lower suspensions 16 described later.

The base end 95c of the pair of upper and lower flexible printed circuit boards 95, which is the end opposite to the forked portion 95a, is connected to the inner surface of the pair of upper and lower suspensions 15 at the bent portion 13a of the bent head actuator 13. 15f and the inside surface 14f of the distal end 14a of the head arm 14 are drawn inward, and the base end portion 95c is further separated by a pair of upper and lower gaps due to the thickness of a pair of upper and lower base plates 15b fixed above and below the distal end 14a of the head arm 14. 96, the bending type head actuator 1
3, the head arm 14 is traversed in the width direction by short-circuiting (shortcut) the inside of the bent portion 13a,
The head arm 14 is drawn out of the outer side surface 14e. The distal end 95 d of the base end portion 95 c of the pair of upper and lower flexible printed circuit boards 95 is connected to the flexible printed circuit board 94 at a relay point 93.

In this case, as shown in FIG. 5, the tip 95b of the forked portion 95a of the pair of upper and lower flexible printed circuit boards 95 is insulated from the upper and lower opposing surfaces of the pair of upper and lower bifurcated flexures 15c of the pair of upper and lower suspensions 15. Print wiring is performed via the layer 97. Therefore, these tips 95b are connected to a pair of upper and lower floating head sliders 16.
Can be easily connected to the connection terminal 16b by soldering or the like. Further, as shown in FIG. 14, the tip 95 of the base end 95c of the pair of upper and lower flexible printed circuit boards 95 is provided.
d is the movable end 9 of the flexible printed circuit board 94 fixed to the outer surface 14e of the head arm 14 by bonding or the like.
4a is connected to the outside by soldering or gold ball connection.

The first embodiment of the head wiring structure 91 in the R-HDD (small) 1 of the present invention is configured as described above, and the base end portion 95c of the flexible printed circuit board 95 as a wiring member is provided. Bend type head actuator 1
3 is drawn out to a relay point 93 outside the head arm 14 such that the inside of the bent portion 13a is short-circuited (shortcut). Therefore, the wiring length can be significantly reduced as compared with the wiring length of the conventional flexible printed board 95 shown in FIG.

That is, FIG. 7 shows the wiring of the flexible printed circuit board 95 to the small bending head actuator 13 of the present invention, using the conventional design method described with reference to FIG. 13A shows an example in which wiring is performed so as to bypass the outside of the head 13a. In this case, the distance L3 between the center of the rotation center axis 17 of the bending type head actuator 13 and the center of the flying head slider 16 is L3 = 31. .4 mm, the average wiring length L4 of the flexible printed circuit board 95 =
33.95 mm, and the weight of the flexible printed circuit board 95 is increased. Therefore, when the thickness of the flexible printed circuit board 95 is 20 μm, the inertia around the rotation center axis 17 of the bending type head actuator 13 =
3.29 × 10 ² gmm ² .

On the other hand, if the method of designing the wiring of the flexible printed circuit board 95 of the present invention for the small bending head actuator 13 of the present invention shown in FIG.
If the distance L3 = 31.4 mm between the center of the floating head slider 16 and the center of the flying head slider 16 is the same, the average wiring length L4 of the flexible printed circuit board 95 can be greatly reduced to 31.65 mm. The weight of the flexible printed circuit board 95 can be greatly reduced, and if the flexible printed circuit board 95 has the same plate thickness = 20 μm, the rotation center axis 1
Inertia around 7 = 2.9 × 10 ² gmm ² was able to be greatly reduced.

As a result, the small bending type head actuator 13 using the wiring method of the present invention can significantly reduce the inertia of the pair of upper and lower floating head sliders 16 with respect to the disk 25 to be described later when seeking. Tracking performance is improved, and constant-speed tracking becomes possible.

Furthermore, according to the small-sized bending head actuator 13 using the wiring method of the present invention, the base end portion 95c of the flexible printed board 95 is short-circuited inside the bending portion 13a of the bending type head actuator 13 ( 65) and does not bypass the outside of the bent portion 13a, so that no dead space DS as described with reference to FIG. 65 is generated outside the bent portion 13a. As a result, as shown in FIG. 24, the bending type head actuator 1 in which the drive motor 61 and the like of the cam mechanism 18 described above are returned to the arm lock position P11 in the direction of arrow h.
A very small approach distance L5 at the position behind the third bent portion 13a.
Can be approached. This is because R
-R-HDC to be described later mounted in the HDD (small) 1
The distance between the (small) 21 and the drive motor 61 of the cam mechanism 18 wired at the rearmost position can be shortened, and the R-HDD (small) 1 can be further downsized. Become.

In the first embodiment of the head wiring structure, a pair of upper and lower flexible printed circuit boards 95 are wired along inner surfaces which are upper and lower opposing surfaces of a pair of upper and lower suspensions 15. In the first embodiment, the flexible printed circuit board 95 can be wired along the outer surface (the upper surface of the upper suspension 15 and the lower surface of the lower suspension) opposite to the upper and lower opposing surfaces of the pair of upper and lower suspensions 15.

(B7) Description of Second Embodiment of Head Wiring Structure of Small Bend-Type Head Actuator Next, FIG. 32 to FIG. The second embodiment will be described. This small bending type head actuator 13 is composed of a pair of upper and lower suspensions 15 having base ends 15a.
Are bent at a predetermined angle above and below the distal end 14a of the head arm 14 and are fixed vertically symmetrically, the outer surfaces of the base end 15a of the pair of upper and lower suspensions 15 (the upper surface of the upper suspension 15 and the lower suspension 15). A pair of upper and lower base plates 15b are fixed in parallel to each other by caulking or the like, and crimping bosses 15c are integrally formed on the upper and lower opposing surfaces of the upper and lower base plates 15.
In the same manner as described above, they are press-fitted from above and below into both upper and lower ends of a caulking hole 14b formed to penetrate above and below the tip end 14a of the head arm 14.

In the second embodiment of the head wiring structure, a pair of upper and lower flexible printed circuit boards 95 is provided.
The forked part 95a of the small bending type head actuator 1
3 are wired along the upper and lower opposing surfaces of the pair of upper and lower suspensions 15, and their tips 95 b are connected to the pair of upper and lower flying head sliders 16. The upper and lower base ends 95c are bent in a substantially arc shape along the inner periphery of the press-fit shaft 14b without projecting inward from the inner side surfaces 15e of the pair of suspensions 15, so that the outer surface of the head arm 14 is formed. It is drawn out of 14e and connected to the movable end 94a of the flexible printed circuit board 94 at the relay point 93.

Therefore, according to the second embodiment of the wiring structure, it is possible to wire the flexible printed circuit board 95 between the flying head slider 16 and the relay point 93 in the shortest distance. The wiring length of the printed board 95 can be further shortened than the wiring length of the flexible printed board 95 in the first embodiment. Thereby, the weight of the pair of upper and lower flexible printed circuit boards 95 can be further reduced, and the inertia at the time of rotation in the directions of arrows g and h about the rotation center axis 17 of the bent head actuator 13 is further reduced. It can be kept small. The other configuration is the same as that of the first embodiment.

(B8) Description of Small Removable Hard Disk Cartridge and Small Removable Hard Disk Drive Next, referring to FIGS. 35 to 45, a small removable hard disk cartridge and a small bent head actuator 13 were used. To explain a small-sized removable hard disk drive, first, FIG.
As shown in FIG. 43 and the like, a small removable hard disk cartridge which is a small removable disk cartridge (hereinafter simply referred to as R-HDC (small))
Reference numeral 21 is substantially similar in shape to the conventional large removable hard disk cartridge R-HDC (large) 121, and is much smaller than the conventional R-HDC (large) 121. . Therefore, this RH
DC (small) 21 includes upper and lower shells 122 and 123, cartridge body 124, disk 125, center core 126, and head insertion hole 12 of conventional R-HDC (large) 121.
7, disc table insertion hole 128, upper and lower partitions 12
9, 130, disk storage chamber 131 and three dowels 13
2 are provided with upper and lower shells 22, 23, a cartridge main body 24, a disk 25, a center core 26, a head insertion hole 27, a disk table insertion hole 28, upper and lower partitions 29, 30 and a dowel 32, respectively.

The R-HDC (small) 21 is a shutter 135, a disc table insertion hole opening / closing section 136, and a head insertion hole opening / closing section 1 of the conventional R-HDC (large) 121.
37, base end portion 138, spring locking portion 139, opening / closing arm portion 140, notches 141, 142, spring storage chamber 144, fulcrum pin 145, spring locking portion 146, torsion coil spring 14
7, escape groove 151, recess 152, slit 153, positioning holes 154 and 155, positioning protrusions 156 and 1,
57, light protector 158, filter-storage room 15
9 and the circulation filter 160, respectively, the shutter 35, the disc table insertion hole opening / closing portion 36, the head insertion hole opening / closing portion 37, the base end 38, the spring locking portion 39, the opening / closing arm portion 40, the notches 41, 42, Spring storage chamber 44, fulcrum pin 45, spring locking portion 46, torsion coil spring 47, guide groove 51, concave portion 52, slit 53, positioning hole 5
4, 55, positioning bosses 56, 57, write protector 58, filter storage chamber 59, and circulation filter 6
0 etc. are also provided.

The R-HDC (small) 21 is, as shown in FIGS. 35 to 40 and FIG.
Has a diameter D1 of about 50 mm or less, preferably a diameter D1 =
48 mm (1.89 inches), and the thickness T1 of the disk 25 is about 0.7 mm or less, preferably T1 =
It is 0.508 mm (see FIG. 44). The outer diameter of the cartridge body 24 of the R-HDC (small) 21 is such that the maximum width W1, which is the maximum width between the left and right sides 24c and 24d, is about 53 mm or less, and preferably the maximum width W1 is 51.6 mm. The front and rear ends 24
The maximum depth D2, which is the maximum dimension between a and 24b, is about 56 m
m, preferably the maximum width W1 = 54 mm, and the maximum thickness T2 was about 6 mm or less, preferably the maximum thickness T2 = 4 mm. The radius R1 of the arc-shaped front end 24a of the cartridge body 24 centered on the fulcrum pin 45 of the shutter 35 is set to about 53 mm or less, preferably, the radius R1 = 51.7 mm. The length L1 is about 18 mm or less, preferably, the length L1 = 16.35 mm, and the diameter D3 of the circular disk table insertion hole 28 is about 12 mm or less, preferably, the diameter D3 = 10 mm.
The offset amount OS1 of the fulcrum pin 45 to one side of the center of the cartridge body 24 is about 3.6 mm.
And the fulcrum pin 4 of the disc table insertion hole 28
5 is set to about 25.2 mm, the length L1 of the head insertion hole 27 is set to about 16.35 mm, and the other side 24c of the head insertion hole 27 with respect to one side 24d of the cartridge body 24. The distance L2 to the side end is set to about 18 mm.

The R-HDC (small) configured as described above
According to No. 21, in particular, the maximum width W1 of the cartridge body 24 is reduced to about 53 mm or less (preferably W1 = 51.6 mm) by employing the small disk 25 having a diameter D1 of about 50 mm or less (preferably D1 = 48 mm). ) And reduce the maximum depth D1 to about 72 mm or less (preferably W1
= 54 mm) and this R-HDC
The (small) 21 could be reduced to several tens of percent or less of the conventional large R-HDC (large) 121. Therefore, this R-HDC (small) 21 is a conventional large R-HDC.
Since it has a similar shape to (large) 121 and is significantly reduced in size, portability, storage ability, etc. can be remarkably improved, and high-capacity (high-density) information recording and And / or a feature that reproduction is possible.

FIG. 41 shows a conventional R-HDC (large).
R-HDD (Large) 101, which is a conventional large disk storage device using a large bent head actuator 113 for recording and / or reproducing 121, and R-HDC
The drawing shown to compare the size with the R-HDD (small) 1 which is a small disk storage device capable of using the small bent head actuator 13 for recording and / or reproducing the (small) 21. Yes, conventional R-HDC
(Large) 121 and large bent head actuator 1
13 and the outside diameter of the large R-HDD (large) 101 are indicated by a dashed line, and the outside diameter of the R-HDC (small) 21 and the small bent head actuator 13 and the outside diameter of the R-HDD (small) 1 are shown. Is indicated by a solid line.

Then, as described above, R-HDC
Since the (small) 21 could be significantly reduced in size as compared with the conventional R-HDC (large) 121, the R-HDC (small) 21 was recorded and / or reproduced as shown in FIG. The bending type head actuator 13 can be significantly reduced in size in comparison with the conventional large bending type head actuator 113, so that the R-HDD that can use the small bending type head actuator 13 can be used. (Small) 1 is also a conventional large R-HDD (Large)
It is possible to greatly reduce the size as compared with 101.

That is, the width W3 and the depth D5 of the R-HDD (small) 1 for recording and / or reproducing the R-HDC (small) 21 are recorded and / or reproduced on the conventional R-HDC (large) 121. Width W of R-HDD (Large) 101
13 and a depth dimension D15. Therefore, this R-HDD (small) 1 is
As in the case of (small) 21, the portability, storage ability, and the like can be significantly improved.

By the way, as described above, the R-HDD
The small bent head actuator 13 used for the (small) 1 is almost similar in shape to the large bent head actuator 113 used for the conventional large R-HDD (large) 101 and has a small size. That has been
As described above, the head arm 14, the pair of upper and lower suspensions 15 bent and attached to the distal end 14a of the head arm 14 at a predetermined angle, and the upper and lower suspensions 15 are attached to the distal ends of the upper and lower suspensions 15 so as to be vertically opposed to each other. And a pair of upper and lower floating head sliders 16,
A small voice coil motor 18 which is a linear motor is configured to be driven to rotate around the rotation center axis 17 in the directions of arrows g and h. Note that the small V
A small R-HDD whose CM19 is shown by a solid line in FIG.
It is mounted on the bottom of the (small) 1 drive body 2. In addition, the bending type head actuator 13 includes:
Although not shown in FIG. 41, the conventional large R-HDD
The cartridge holder 104, the elevating mechanism 106, the spindle motor 110, and the like, which are built in the (large) 101, are reduced in size to have a similar shape.

As described above, this small-sized bent head actuator 13 operates in the same manner as the conventional large-sized bent head actuator 113 by using the R-HDC.
It is possible to record and / or reproduce information on the (small) 21 disks 25. That is, the aforementioned R-HDD
Similarly to the recording and / or reproduction of the R-HDC (large) 121 by the (large) 101, the R-HDC (small) 21 is an R-HDC.
D (small) 1, the shutter 35 is rotated in the direction of arrow m against the torsion coil spring 47 from the closed position shown in FIG. 41 to the open position shown in FIG. And the disk table insertion hole 28 are opened at the same time, the R-HDC (small) 21 is
The spindle 10a is mounted on the
Of the center core 2
6 is magnetically chucked on the disk table 11.

After the mounting of the R-HDC (small) 21, as described above, the bending type head actuator 1
3 is rotated by a cam mechanism 18 and a ramp 69 so that
Around the arm lock position P11 outside the R-HDC (small) 21 shown by the solid line in FIG. 47 to the arm load / unload position P12 shown by the one-dot chain line in the direction of the arrow g. At about the same time when the arm load / unload position P12 is reached, the spindle motor 10 is raised to a steady rotation speed and the disk 25 is driven to rotate at a constant speed. Thereafter, the bending type head actuator 13 is rotationally driven by the VCM 19 from the arm load / unload position P12 indicated by a dashed line in FIG. 42 to the landing position P13 indicated by a solid line in FIG. Is loaded to the landing position P13 of the disk 25. At this time, the pair of upper and lower flying head sliders 16 is soft-landed on the airflow AF generated on both upper and lower surfaces of the disk 25. And after this,
The VCM 19 causes the bent head actuator 13 to move between the innermost position 15 and the outermost position P16 of the position P14 in the recording area of the disk 25 indicated by the alternate long and short dash line in FIG. , H in order to record and / or reproduce information on the disk 25.

After the recording and / or reproduction of the disk 25 is completed, the bending type head actuator 13 is moved from the position P14 in the recording area on the disk 25 to the landing position P13 by the VCM 19 in the reverse operation at the time of head loading. After unloading in the direction of the arrow h to the arm load / unload position P12,
The bending type head actuator 13 is returned by the cam mechanism 18 from the arm load / unload position P12 to the arm lock position P11 in the direction of the arrow h and locked. After that, if the eject button of the R-HDD (small) 1 is pressed, the R-HDC (small) 21 is detached upward from the spindle motor 11, and then the R-HDD (small) 1 is released.
The shutter 35 is rotated from the open position to the closed position by the torsion coil spring 47 at this time. And R-HDC
The (small) 21 is pulled out of the cartridge insertion opening of the R-HDD (small) 1.

Next, details of each part of the R-HDC (small) 21 will be described. First, as shown in FIGS. 44 to 46, the spring housing 46 of the cartridge body 24 is
The spring storage portion 46 is provided outside the disk storage chamber 31 independently of the partition walls 29 and 30. The arc-shaped opening / closing arm 40 of the shutter 35 is formed in the recess 5 formed in the lower shell 23.
2 is inserted into the spring storage portion 46 through the coil portion 48 on the outer periphery of the spring locking portion 46 in the spring storage portion 46.
Working end 4 of torsion coil spring 47 into which is inserted and locked
9 is in contact with a bent portion 40b formed at the base of the tip portion 40a of the opening / closing arm portion 40 of the shutter 35.

With this configuration, the fulcrum pin 45 and
Since the radius between the working end 49 of the torsion coil spring 47 and the point of action with respect to the shutter 35 can be increased, even if the spring force of the torsion coil spring 47 is set to be small,
The rotation urging force in the direction of arrow k which is the closing direction of the shutter 35 can be set sufficiently large, and the shutter 3
5 can be opened and closed smoothly in the directions of the arrows k and m, and the spring storage section 46 is arranged independently outside the disk storage chamber 31. Dust or the like that easily adheres and accumulates on the coil portion 48 and the like enters the disk storage chamber 31,
It can be prevented from adhering to the upper and lower recording surfaces of the disk 25 and causing inconvenience such as dropout.

Next, FIG. 44, FIG. 45 and FIG.
FIG. 44 is an enlarged cross-sectional view of a main part when the HDC (small) 21 is not used, and FIG.
FIG. 45 shows an enlarged cross-section with a part expanded, and FIG.
2 shows an enlarged cross section taken along line FF of FIG. Then, as described above, the thickness T1 of the disk 25 is 0.508 mm.
And the maximum thickness T2 of the R-HDC (small) 21 = 4 mm
And the inner surfaces 22 of the upper and lower shells 22 and 23
The height T3 in the vertical direction of the disk storage chamber 31 formed between a and a is set to 2.2 mm, and the thickness T4 of the shutter 35 is set to 0.2 mm.

Then, the center core 26 is
And a lower member 26b made of a ferromagnetic member such as a disc-shaped sheet metal fixed by bonding or the like above and below a circular hole 25b formed in the central portion of the plate, a leaf spring member, an insulating member, and the like. A central hole 26a is formed at the center of the lower member 26b, which is composed of an upper member 26c in a two-layer state and a thick plate. The upper member 26
In the center of c, a central cylindrical portion 26 bulged upward.
d is formed.

The inner surface 23a of the lower shell 23 is formed with three dowels 32 integrally formed at three locations on the outer periphery of the disc table insertion hole 28 at a height T5 = 0.25 mm. The height T5 is configured to be 0.05 mm higher than the thickness T4 of the shutter 35 = 0.2 mm. Therefore, as shown in FIGS. 44 and 45, when the disc 25 is placed horizontally above the three dowels 32 on the lower surface of the outer peripheral portion of the lower member 26b of the center core 26 when not in use or the like. A gap 33 of 0.05 mm is formed between the lower member 26b and the shutter 35, and the shutter 35 can be opened and closed in this state. The shutter 35
The head opening / closing portion 37, which is vertically formed outsert by a synthetic resin on the front end side and formed in an arc shape, has a pair of upper and lower portions formed in an arc shape on the inner surfaces 22a, 23a of the upper and lower shells 22, 23. Is configured to be slid in the above-described arrow k and m directions in the guide groove 34.

Next, as shown in FIG. 44 and FIG.
A center pin 22b at the center position of the inner surface 22a of the upper shell 22 in the cartridge body 24 of the HDC (small) 21;
Are formed integrally in a downward vertical shape. The outer diameter D3 of the center pin 22a is set to the upper member 2 of the center core 26.
6b is formed smaller than the inner diameter D4 of the central cylindrical portion 26d formed at the upper center portion. And FIG.
As shown in FIG. 45, in a state where the disk 25 is horizontally mounted on the three dowels 32 by the center core 26, the upper end portion of the center cylindrical portion 26d of the center core 26 corresponds to the lower end portion of the center pin 22b. An annular gap 22c on the outer circumference
It is configured to be inserted shallowly in a state having

Therefore, even when the R-HDC (small) 21 is not used, the center cylindrical portion 26d of the center core 26 is inserted shallowly into the outer periphery of the lower end portion of the center pin 22b of the upper shell 22. As shown in FIG. 45, in this non-use state, even if an external impact or the like in the direction of arrow n which is a horizontal direction is applied to the cartridge body 24, the central cylindrical portion 26d
Collides with the side surface of the center pin 22b, and a large displacement of the disk 25 in the direction of the arrow n in the cartridge body 24 can be prevented. Therefore, the disk 25
Center core 26 can always be stably and horizontally placed on the three dowels 32, and the center core 26 slides down from one of the three dowels 32 in the direction of arrow n.
The recording data can be prevented from being damaged before the lower recording surface 25d of the disk 25 comes into contact with the inner surface 23a of the lower shell 23 or the shutter 35.

Then, as described above, R-HDC
When the (small) 21 is used, the R-HDC (small) 21
Inserted into the HDD (small) 1 and as shown in FIG.
The spindle 10a of the spindle motor 10 is relatively inserted into the center hole 26a of the center core 26 of the disk 25 from below, and the lower member 26b made of a ferromagnetic member of the center core 26 is placed on the disk table 11, When the chucking is performed horizontally by the chucking magnet 12 inserted into the disc table 11, the lower member 2 of the center core 26 is
6b is floated horizontally upward from the three dowels 32,
The disk 25 is floated at a substantially central position in the vertical direction in the disk storage chamber 31, and the upper and lower recording surfaces 25 of the disk 25 are
It is configured such that recording and / or reproduction of information on c and 25d can be performed. At this time, the center cylindrical portion 26d of the center core 26 is
It is configured to be inserted deeply with a clearance (play) around the outer periphery of 2b.

On the upper surface of the outer peripheral portion of the upper member 26c formed of a leaf spring member of the center core 26, a substantially circular arc shape having a concentric circular shape with the central cylindrical portion 26d and a shallow cross-sectional shape is formed. An upward annular concave portion 26e is formed concentrically with the central cylindrical portion 26d, and a downward annular convex portion 22d formed in a substantially arcuate shape with a slightly deeper cross section so as to face the annular concave portion 26e. A central pin 22b is formed concentrically on an inner surface 22a of the shell 22.

Then, as shown in FIG. 46, R-HDC
When the (small) 21 is not in use, the cartridge body 24
Due to an external impact applied to the disk storage chamber 31
When a thrust force in the direction of arrow o on the upper shell 22 side is applied to the inner disk 25 or when the upper and lower shells 22 and 23 of the cartridge body 24 are turned upside down (top and bottom), the central cylindrical portion of the center core 26 The upper end of the upper shell 22 abuts on the inner surface 22 a of the upper shell 22 on the outer peripheral portion of the center pin 22 b in the direction of the arrow o, and the inner surface 22 of the upper shell 22.
a and T6 between the upper recording surface 25c of the disk 25
It is configured such that a gap 22e of about 0.142 mm is secured. Therefore, at this time, it is possible to prevent the recording data from being damaged due to the upper recording surface 25c of the disk 25 coming into contact with the inner surface 22a of the upper shell 22.

At this time, the annular concave portion 26e of the upper member 26c constituted by the spring member of the center core 26 is brought into contact with the annular convex portion 22d of the inner surface 22a of the upper shell 22 in the direction of arrow o, and the disk 25 And the inclination of the disk 25 in the direction of the arrow p, which is the vertical direction, is prevented, so that the inclination of the disk 25 in the direction of the arrow p also makes contact with the inner surface 22a of the upper shell 22 of the upper recording surface 25c. It can be prevented beforehand.

When the R-HDC (small) 21 is not used, the disk 25 is moved into the disk storage chamber 31 by the inclination of the cartridge main body 24 or an external impact.
4, when the disk 25 is tilted in the direction of arrow q, the outermost peripheral edges 25e and 25f of the upper and lower surfaces of the disk 25 are aligned with the inner surfaces 22a of the upper and lower shells 22 and 23.
At this time, the upper and lower recording surfaces 25b and 25c of the disk 25 can be prevented from contacting the inner surfaces 22a and 23a of the upper and lower shells 22 and 23 to damage the recorded data. .

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.

[0165]

The head actuator and the disk storage device of the present invention configured as described above can provide the following effects.

In the head actuator according to the present invention, when the flying head slider is loaded / unloaded onto a disk or a recording area by a voice coil motor,
Even if a load larger than the load of the head actuator during the seek operation on the disk is applied, the drive torque of the head actuator is temporarily increased by the partial drive torque increase portion provided in the voice coil motor. As a result, the flying head slider can be replaced with a voice coil motor, despite the fact that the voice coil motor is sufficiently miniaturized, but no exciting force that is detrimental to tracking is generated and high-precision tracking can be performed. Thus, even when a large load is applied when loading / unloading onto a disk or a recording area, the loading / unloading can be performed strongly and reliably. Therefore, a compact, high-performance, high-quality disk storage device can be easily designed and manufactured.

According to the second and third aspects of the present invention, the portion for increasing the driving torque of the voice coil motor is partially protruded outside or inside the end of the magnet and overlaps with the outside or inside radius portion of the coil. Since it is constituted by a convex portion to be wrapped or by a convex portion which increases the plate thickness of the end portion of the magnet or one yoke, the structure is simple, the production is easy, and the size of the voice coil motor can be reduced. Can be reliably realized.

According to a fourth aspect of the present invention, when the floating head slider of the head actuator is loaded / unloaded from the outside of the disk onto the disk by the voice coil motor, the suspension dynamically loads / unloads against the spring force. Even when a load larger than the load of the head actuator on the disk during the seek is applied when riding over the load ramp, the drive torque of the head actuator is reduced by the partial drive torque increase portion provided in the voice coil motor. As it can be temporarily increased, the voice coil motor can be sufficiently miniaturized, and no exciting force that is detrimental to tracking is generated. Move the head slider with the voice coil motor. When loading / unloading from the outside on the disc, the suspension can be overcome strong dynamic load / unload ramp against its spring force. Therefore, a compact, high-performance, high-quality disk storage device having a dynamic load / unload mechanism can be realized.

In the disk storage device according to the fifth or sixth aspect of the present invention, the part for increasing the driving torque of the voice coil motor is partially projected outside or inside the end of the magnet, and the portion outside the inside or outside of the coil is projected. Because it is composed of a convex portion that overlaps the radius portion or a convex portion that increases the plate thickness of the end of the magnet or one yoke, the structure is simple, the production is easy, and the voice coil motor Miniaturization of the disk storage device by miniaturization can be easily realized.

According to the disk storage device of the present invention, it is possible to easily realize a disk storage device having a small, high-performance, high-quality dynamic load / unload mechanism using a removable disk.

[Brief description of the drawings]

FIG. 1 is a diagram showing a drive control method of an R-HDD (small) spindle motor to which the present invention is applied, in comparison with a conventional R-HDD (large) spindle motor control method.

FIG. 2 is a block diagram of a spindle motor drive control circuit of the same R-HDD (small).

FIG. 3 is a diagram showing a measurement result of a dust intrusion amount into an R-HDC (small) recorded and / or reproduced by the same R-HDD (small).

FIG. 4 is a cross-sectional side view illustrating a positional relationship between an arm lock position of a bending head actuator and R-HDC (small).

FIG. 5 shows the arm load / unload position of the bending type head actuator of the R-HDD (small) and the RH.
It is a sectional side view explaining the positional relationship of DC (small).

FIG. 6 is a cross-sectional side view for explaining the dynamic load / unload operation of the bending head actuator of the above.

FIG. 7 is a cross-sectional side view illustrating a head loading / unloading operation of a flying head slider of the bending type head actuator.

FIG. 8 is a partially cutaway plan view illustrating a dynamic load / unload mechanism of the R-HDD (small).

FIG. 9 is a partially cutaway plan view illustrating an arm lock position of the bending type head actuator that is rotated and driven by the dynamic load / unload mechanism according to the first embodiment.

FIG. 10 is a partially cutaway plan view illustrating an arm load / unload position of the bent head actuator according to the first embodiment.

FIG. 11 is a partially cutaway plan view illustrating a landing position of the bending head actuator according to the first embodiment.

FIG. 12 is a partially cutaway plan view illustrating a position in a recording area of the bending head actuator according to the first embodiment.

FIG. 13 is an exploded perspective view for explaining a first embodiment of a driving torque of a VCM for driving a small bending head actuator of the R-HDD (small).

FIG. 14 shows a bent head actuator and VC of the above.
It is a top view of M.

15 is a partially cutaway side view taken along the line II of FIG. 14;

FIG. 16 is a partially cutaway plan view of the VCM when the bending type head actuator is on standby at an arm lock position.

FIG. 17 is a partially cutaway plan view of the VCM when the bending type head actuator is in a standby state at an arm load / unload position.

18 is a partially cutaway side view taken along the line HH of FIG. 17;

FIG. 19 shows V when the bending type head actuator is rotated to the innermost position of the position in the recording area.
It is a partially cutaway plan view of CM.

FIG. 20 is a diagram illustrating a drive torque and a rotation angle diagram of a coil in the first embodiment relating to the drive torque according to the first embodiment.

FIG. 21 is a plan view for explaining a second embodiment relating to a driving torque of a VCM for driving the bending head actuator of the above.

FIG. 22 is a partially cut-away side view for explaining a third embodiment of the driving torque of the VCM for driving the bending head actuator according to the third embodiment.

FIG. 23 is a perspective view of a magnet for driving the bending type head actuator of the above.

FIG. 24 is a plan view illustrating a first embodiment of a head wiring structure in the bent head actuator according to the first embodiment.

FIG. 25 is a side view as viewed in the direction of arrows JJ in FIG. 24.

FIG. 26 is a three-view drawing showing the upper surface, the side surface, and the lower end of the upper suspension of the bending head actuator of the above.

FIG. 27 is an exploded perspective view of a head arm and a pair of upper and lower suspensions of the bending head actuator according to the first embodiment;

FIG. 28 is a perspective view showing a flexure, a gimbal, a flying head slider, and a wiring member of the bending head actuator according to the first embodiment.

FIG. 29 is a plan view illustrating a wiring length and an inertia of a wiring member of the bending head actuator according to the embodiment.

FIG. 30 is a plan view illustrating a wiring length and an inertia when a wiring member is wired to the bent head actuator by the conventional wiring method.

FIG. 31 is an exploded perspective view of a wiring member and a voice coil motor of the bending type head actuator according to the first embodiment.

FIG. 32 is a plan view illustrating a head wiring structure in a bent head actuator according to a second embodiment of the present invention.

FIG. 33 is a side view taken along the line KK of FIG. 32;

FIG. 34 is a three-view drawing showing an upper surface, a side surface, and a lower surface of the upper suspension of the bending head actuator according to the first embodiment;

FIG. 35 shows an R applied to an R-HDD (small) of the present invention.
FIG. 9 is a plan view showing -HDC (small) in comparison with a conventional R-HDC (large).

FIG. 36 shows an R applied to the R-HDD (small) of the present invention.
FIG. 10 is a bottom view showing -HDC (small) in comparison with a conventional R-HDC (large).

FIG. 37 is an enlarged front view as viewed in the direction of arrows AA in FIG. 35;

FIG. 38 is an enlarged rear view as viewed in the direction of arrows BB in FIG. 35.

FIG. 39 is an enlarged side view as viewed in the direction of arrows CC in FIG. 35;

40 is an enlarged side view as viewed in the direction of the arrow DD in FIG. 35.

FIG. 41 shows an R-HDD (small) employing a small-sized bent head actuator according to the present invention and an R applied thereto;
-HDC (small), a partially notched plane showing a comparison between an R-HDD (large) adopting a conventional large bending head actuator and an R-HDC (large) applied thereto. FIG.

FIG. 42 is a partially cutaway plan view showing an arm lock position and an arm load / unload position for the R-HDC (small) of the bending type head actuator of the R-HDD (small) of the present invention.

FIG. 43 shows a curve R of the bent head actuator shown in FIG. 42;
FIG. 4 is a partially cutaway plan view showing a landing position in −HDC (small) and an innermost position of a position in a recording area.

FIG. 44 is a view showing EE of FIG. 35 of the same R-HDC (small).
It is the expanded sectional view which expanded and showed a part by arrow.

FIG. 45 is a cross-sectional view illustrating the regulation of horizontal sliding of the disk in the R-HDC (small) shown in FIG. 44.

FIG. 46 is an enlarged cross-sectional view of the R-HDC (small) disk shown in FIG. 44, as viewed from the direction indicated by arrows FF in FIG. 35, showing a state where the disk is chucked on a spindle motor.

FIG. 47 is a cross-sectional view illustrating the regulation of the movement of the disk in the R-HDC (small) shown in FIG. 45 to the upper shell side.

FIG. 48: Conventional R-HDC (large) and R-HDD
It is the perspective view which showed (large).

FIG. 49 is a plan view of a conventional R-HDD (large) with an upper cover removed.

FIG. 50 is a partially cutaway side view illustrating a conventional R-HDD (large) cartridge holder, an elevating mechanism, a spindle motor, and the like, and is a partially cutaway side view showing a rising state of the cartridge holder. is there.

FIG. 51 is a partially cutaway side view showing a lowered state of the cartridge holder of FIG. 50.

FIG. 52 shows an R-drive of a bending head actuator in a dynamic load / unload mechanism of a large bending head actuator in a conventional R-HDD (large).
It is a partially notched top view explaining the arm lock position with respect to HDC (large).

FIG. 53 is a view showing R-
FIG. 4 is a partially cutaway plan view illustrating an arm load / unload position with respect to an HDC (large).

FIG. 54: R-
It is a partially notched top view explaining the landing position with respect to HDC (large).

FIG. 55: R-
FIG. 4 is a partially cutaway plan view illustrating a position in a recording area with respect to HDC (large).

FIG. 56 is an exploded perspective view of a large bent head actuator used in a conventional R-HDD (large).

FIG. 57 is a plan view illustrating a VCM and a ramp of a conventional large-sized bent head actuator.

FIG. 58 is a plan view illustrating a driving torque of a conventional large-sized VCM with an upper yoke removed.

59 is a partially cutaway side view as viewed in the direction of arrows KK in FIG. 58.

FIG. 60 is a side view taken along the line LL in FIG. 57;

FIG. 61 is a cross-sectional side view illustrating an arm lock position of a large bent head actuator with respect to a conventional R-HDC (large).

FIG. 62 is a cross-sectional side view illustrating an arm load / unload position of a large bent head actuator with respect to a conventional R-HDC (large).

FIG. 63 is a cross-sectional side view illustrating a head loading / unloading operation of a large-sized bent head actuator with respect to a conventional R-HDC (large).

FIG. 64 is an exploded perspective view illustrating a head wiring structure of a conventional large-sized bent head actuator.

FIG. 65 is a plan view illustrating a head wiring structure of a conventional large-sized bent head actuator.

FIG. 66 is a perspective view of a conventional R-HDC (large).

FIG. 67 is an exploded perspective view of upper and lower shells of a conventional R-HDC (large).

FIG. 68 is an exploded perspective view of the entire inside of a conventional R-HDC (large).

FIG. 69 is a partially cutaway plan view showing a shutter closed state of a conventional R-HDC (large).

FIG. 70 is a partially cutaway plan view showing a shutter open state of a conventional R-HDC (large).

[Explanation of symbols]

1 is an R-HDD (small) as a disk storage device, 13 is a bent head actuator as a head actuator, 14 is a head arm, 15 is a suspension, 16
Is a flying head slider, 17 is a rotation center axis, 18, 1
Reference numerals 9 and 69 denote a cam mechanism, a VCM, and a dynamic load / unload mechanism constituting a dynamic load / unload mechanism.
Ramp for unloading, 81 is a coil of VCM, 81a is a radial portion of the coil, 81b is an outer corner portion of the coil, 81c is an effective length portion of the coil, 81d is an inner corner portion of the coil, 81e is a curved portion of the coil, 82 is a magnet, 82a is an end of the magnet, 82b is an outer convex portion of the magnet, 82c is an effective width portion of the magnet,
d is the inner convex portion of the magnet, 82f is the lower convex portion of the magnet, 83 is the upper yoke of the VCM, 84 is the lower yoke of the VCM, and 90 is the drive torque increasing portion of the VCM.

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 31, 2001 (2001.7.3)
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

That is, FIG. 7 shows a small bent type head according to the present invention.
Flexible print base for
With respect to the wiring of the plate 95, the conventional design method described in FIG.
Of the bending type head actuator 13 using the
An example in which wiring is performed so as to bypass the outside of the curved portion 13a is shown.
In this case, the bent head actuator
Of the rotating center axis 17 of the rotor 13 and the flying head slider
For the distance L3 = 31.4 mm from the center of -16
And the average wiring length L4 of the flexible printed circuit board 95 =
33.95mm, flexible printed circuit board
Since the weight of 95 increases, flexible printing
When the thickness of the substrate 95 is 20 μm,Flexible pre
Board 952. Inertia around the rotation center axis 17 = 3.
29gmm ^TwoMet.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

On the other hand, if the method of designing the wiring of the flexible printed circuit board 95 of the present invention for the small bending head actuator 13 of the present invention shown in FIG.
If the distance L3 = 31.4 mm between the center of the floating head slider 16 and the center of the flying head slider 16 is the same, the average wiring length L4 of the flexible printed circuit board 95 can be greatly reduced to 31.65 mm. able to significantly reduce the weight of the flexible printed circuit board 95, if the plate thickness = 20 [mu] m of the flexible printed circuit board 95 are the same, the rotational center axis of the flexible printed circuit board 95 17
Inertia around = 2.9 gmm ² could be significantly reduced.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

As a result, the inertia of the small bent head actuator 13 using the wiring method of the present invention can be greatly reduced, the tracking performance is improved, and constant speed tracking becomes possible.

[Procedure amendment]

[Submission date] August 13, 2001 (2001.8.1
3)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 6

FIG. 23

FIG. 40

FIG. 3

FIG. 4

FIG. 5

FIG. 7

FIG. 8

FIG. 9

FIG. 37

FIG. 10

FIG. 11

FIG.

FIG. 27

FIG. 39

FIG. 13

FIG. 14

FIG.

FIG. 16

FIG.

FIG.

FIG.

FIG. 50

FIG.

FIG. 21

FIG. 24

FIG. 31

FIG.

FIG. 25

FIG. 29

FIG. 26

FIG. 28

FIG.

FIG. 66

FIG. 32

FIG. 33

FIG. 34

FIG. 35

FIG. 36

FIG. 56

FIG. 57

FIG. 38

FIG. 41

FIG. 42

FIG. 43

FIG. 63

FIG. 44

FIG. 45

FIG. 46

FIG. 47

FIG. 48

FIG. 61

FIG. 49

FIG. 51

FIG. 52

FIG. 53

FIG. 54

FIG. 55

FIG. 58

FIG. 59

FIG. 60

FIG. 62

FIG. 64

FIG. 65

FIG. 67

FIG. 70

FIG. 68

FIG. 69

Continuation of the front page (72) Inventor Takashi Yamada 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Minoru Watanabe 6-35, Kita-Shinagawa-ku, Shinagawa-ku, Tokyo Sony Stock F term in the company (reference) 5D068 AA01 BB01 CC12 EE21 GG25

Claims (7)

[Claims] A head arm pivoted about a rotation center axis; a flying head slider supported at a tip of the head arm via a suspension; and an end of the head arm opposite to the suspension side. A coil mounted on the unit, a magnet disposed above or below the coil, a voice coil motor constituted by an upper and lower yoke disposed above and below the coil and the magnet, and the floating head slider is connected to the voice coil. A head actuator configured to load / unload the disk from outside the disk by a motor, wherein the flying head slider is moved within a rotation drive range of the coil of the voice coil motor around the rotation center axis. Necessary for seeking in the recording area of the above disc A partial drive torque increasing portion for partially increasing the drive torque when loading / unloading the flying head slider on the disk or the recording area with respect to the necessary drive torque is provided. A head actuator characterized by the above-mentioned. 2. The voice coil motor according to claim 1, wherein said partial drive torque increasing portion is partially projected outside or inside an end of said magnet, and overlaps with a round portion outside or inside said coil. 2. The head actuator according to claim 1, wherein the head actuator is constituted by a convex portion. 3. The voice coil motor according to claim 1, wherein the portion for increasing the driving torque of the voice coil motor is constituted by the magnet or a convex portion for partially increasing the thickness of the end of one of the yokes. The head actuator according to item 1. 4. A head arm pivoted around a rotation center axis, a flying head slider supported at a tip of the head arm via a suspension, and an end of the head arm opposite to the suspension side. A head actuator consisting of a coil attached to the unit, a magnet arranged above or below the coil, a voice coil motor constituted by upper and lower yokes arranged above and below these coils and the magnet, and the floating head slider described above. A dynamic load for moving the floating head slider up and down with respect to the disk against the spring force of the suspension by overcoming the suspension when loading / unloading the disk from outside the disk by the voice coil motor. / Unloading lamp A drive torque required to seek the floating head slider within the recording area of the disk within a rotational drive range of the coil of the voice coil motor around the rotation center axis. On the other hand, when loading / unloading the flying head slider onto / from the disk, there is provided a partial drive torque increasing portion for partially increasing the drive torque when the flying head slider gets over the ramp. A disk storage device, characterized in that: 5. The voice coil motor according to claim 1, wherein said partial drive torque increasing portion is partially projected outside or inside an end of said magnet, and overlaps with a round portion outside or inside said coil. 5. The disk storage device according to claim 4, wherein the disk storage device is constituted by a convex portion. 6. The voice coil motor according to claim 4, wherein the portion for increasing the driving torque of the voice coil motor is constituted by the magnet or a convex portion which increases the thickness of an end of one of the yokes. Disk storage device. 7. The disk storage device according to claim 4, wherein said disk is configured as a removable disk.