JP2000195010A - Magnetic head apparatus and fabricating method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a magnetic head section to swing and move so as to appropriate follow a surface swing of a flexible disk and stably realize recording and/or reproduction of data by precisely and easily positioning a pivot portion at the center portion of a suspension arm in its width direction. SOLUTION: A positioning projection 185 provided at a pivot portion 183 is engaged into positioning holes 186 respectively provided in first and second suspension arms 102 and 103 at the substantially center portions in their width directions. Thus, the pivot portion 183 is positioned at the substantially center portions of the respective first and second suspension arms 102 and 103 in their width directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for recording and / or reproducing data on a disk-shaped recording medium, and more particularly, to a magnetic head device adapted for a plurality of disk-shaped recording media having different recording densities. And a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk device using a 3.5-inch-diameter magnetic disk (flexible disk) in which a signal recording portion is formed on a main surface of a flexible disk substrate as a recording medium has been used in personal computers. And other external storage devices such as office computers and word processors.

Such a magnetic disk device includes a magnetic head device, and records and / or reproduces data on a mounted flexible disk using the magnetic head device.

FIG. 30 shows an example of a magnetic head device provided in a magnetic disk device. The magnetic head device 300 shown in FIG. 30 includes a carriage main body 302 movably attached to a base (not shown). The carriage main body 302 is fed by a head feed mechanism (not shown) in the radial direction of the flexible disk 301 mounted in the magnetic disk device.

At the lower end of the carriage body 302, a first suspension arm 304 is provided which protrudes from the lower surface of a flexible disk 301 mounted on a disk table 303. On the upper end side of the carriage body 302, a second suspension arm 305 is mounted on the upper surface side of the flexible disk 301 placed on the disk table 303 so as to be opposed to the first suspension arm 304. Have been. This second suspension arm 305
The base end is attached to the upper end side of the carriage main body 302 via a leaf spring 306, and is rotatable in a direction approaching and separating from the flexible disk 301.

The second suspension arm 305
The distal end is rotationally urged in a direction approaching the flexible disk 301 on the disk table 303 under the urging force of the leaf spring 306.

[0007] First and second suspension arms 304 extending to the upper and lower surfaces of the flexible disk 301,
First and second magnetic heads 307 and 308 are attached to one end of the main surface of 305 opposite to one of the opposing surfaces. The first and second magnetic head units 307 and 308 each include a magnetic head element whose magnetic gap is exposed on the side of the disk table 303 facing the flexible disk 301.

The magnetic head device 300 rotates the second suspension arm 305 in a direction away from the disk table 303 against the urging force of the leaf spring 306 to move the flexible disk 30 on the disk table 303.
After mounting the second suspension arm 305
Is rotated in a direction approaching the flexible disk 301 to attach the first magnetic head 307 attached to the distal end of the first suspension arm 304 and the distal end of the second suspension arm 305. The disk table 3 is located between the second magnetic head unit 308 and the second magnetic head unit 308.
Data is written to and / or read from the flexible disk 301 by the magnetic head element of the first magnetic head unit 307 or the magnetic head element of the second magnetic head unit 308 sandwiching the flexible disk 301 on the magnetic disk 03. To do.

The first and second magnetic heads 3
31, first and second suspension arms 304, 30 via thin gimbal springs 310, which are displaceable in two axial directions orthogonal to each other, as shown in FIG.
5 is attached to the tip side. Gimbal spring 310
Is formed by punching a leaf spring.

The gimbal spring 310 has a center portion on a surface opposite to a surface on which the first and second magnetic head portions 307 and 308 are mounted, and a pivot attached to the first and second suspension arms 304 and 305. It is supported by the part 311. The first and second magnetic heads 307 and 308 mounted on the gimbal spring 310 supported by the pivot 311 follow the arrow A in FIG. 31 following the elastic displacement of the gimbal spring 310 about the pivot 311. Swinging in the direction and / or the direction of arrow B.

First and second magnetic head portions 307, 30
When recording and / or reproducing data on / from the flexible disk 301, the slider 8 comes into sliding contact with both main surfaces of the flexible disk 301 which rotates integrally with the disk table 303 as shown in FIG. Flexible disk 3
01 is a disk table 30 because it has flexibility.
3 when rotating together with this flexible disk 3
01 may be displaced in the vertical direction without rotating stably in a horizontal plane parallel to the main surface of No. 01.

As described above, the flexible disk 301
When the surface run-out occurs, the first and second magnetic head units 307 and 308 swing and displace in the directions of arrows A and / or B in FIG. A state in which the flexible disk 301 is slidably contacted with the flexible disk 301 is maintained.

As a result, the magnetic head device 300 allows the first and second magnetic head units 307 and 308 to access the recording tracks formed on the signal recording portion of the flexible disk 301 accurately, and the flexible disk 301 And / or stable recording and / or reproduction of data with respect to.

Recently, a high-density flexible disk having a higher recording density than a commercially available flexible disk has been proposed. This high-density flexible disk has the same external dimensions as a conventional flexible disk, but has a storage capacity of 2 megabytes to several tens of megabytes to several hundreds of the conventional flexible disk.
It has increased dramatically to megabytes.

As a magnetic disk drive for recording and / or reproducing data on / from such a high-density flexible disk, from the viewpoint of convenience and the like, recording and / or reproducing data on / from a high-density flexible disk in a high-density recording mode. And a so-called backward compatible disk capable of performing recording and / or reproduction in a low-density recording mode with respect to a conventional flexible disk.

In a magnetic head device provided in a magnetic disk device that realizes such backward compatibility, a magnetic head portion has a higher magnetic head element corresponding to a high-density flexible disk and a lower magnetic head element corresponding to a conventional flexible disk. And a head element.

When the high-density flexible disk is mounted, the magnetic disk device rotates the high-density flexible disk at a rotation speed of, for example, about 3600 rpm to write or read data with the upper magnetic head element. Do. In addition, when a conventional flexible disk is mounted, the magnetic disk device may replace the conventional flexible disk with, for example, 300 r.
At a rotation speed of about pm, information is written or read by a lower magnetic head element.

[0018]

By the way, as described above, the first and second magnetic heads 307 and 308 mounted on the gimbal spring 310 are adapted to appropriately follow the runout of the flexible disk 301. In order to perform the swing displacement, it is important to accurately position the pivot 311 supporting the center of the gimbal spring 310 at the center of the first and second suspension arms 304 and 305 in the width direction.

In particular, in the magnetic head device corresponding to the above-described high-density flexible disk, the amount of runout of the flexible disk is increased due to the rotation operation of the high-density flexible disk at a high rotation speed. Since the improved recording density requires accurate access to the recording tracks, the first and second magnetic heads 307 and 308 are mounted on the flexible disk 3.
It is desired that the pivot portion 311 be positioned extremely accurately at the center in the width direction of the first and second suspension arms 304 and 305 in order to swing and displace so as to appropriately follow the surface runout of the first and second suspension arms 304 and 305. I have.

As described above, the pivot portion 311 is connected to the first
And the swing center of the first and second magnetic head units 307 and 308 is positioned at the center in the width direction of the second suspension arms 304 and 305 so that the swing center of the first and second magnetic head units 307 and 308 can be adjusted by the right and left weights of the magnetic head device 300. This is consistent with the point where balance is maintained. Accordingly, the first and second magnetic head units 307 and 308 are suppressed from being excessively displaced, and are oscillatingly displaced around the pivot 311 so as to appropriately follow the surface deflection of the flexible disk 301. Will be.

However, the conventional magnetic head device 30
In the case of 0, when attaching the pivot portion 311 to the first and second suspension arms 304 and 305, for example, the outer shape of each part or a characteristic part of the part is set as a reference point, and the reference point is set as the reference point. Based on the relative position of each component, the pivot 311 is positioned at the center of the first and second suspension arms 304 and 305 in the width direction.

Therefore, the conventional magnetic head device 300
, The dimensional accuracy and the like of each part
First and second suspension arms 304 and 305
Directly affects the positioning accuracy with respect to the pivot portion 311 and the first and second suspension arms 30.
In the case where an error such as dimensional accuracy or the like occurs for each component in the 4,305, the pivot portion 311 may not be accurately positioned at the center of the first and second suspension arms 304, 305 in the width direction.

Therefore, in the conventional magnetic head device 300, the first and second magnetic head portions 307 and 308 are provided.
However, there has been a case where the oscillation displacement cannot be performed so as to appropriately follow the surface deflection of the flexible disk 301, and thus the electromagnetic conversion characteristics and the like may be deteriorated.

The present invention has been made in view of the above points, and accurately positions the pivot portion at the center of the suspension arm in the width direction so that the magnetic head portion appropriately follows the runout of the flexible disk. It is an object of the present invention to provide a magnetic head device capable of performing such a swing displacement and stably recording and / or reproducing data, and a method of manufacturing the same.

[0025]

A magnetic head device according to the present invention proposed to achieve the above object has a magnetic head unit having a magnetic head element attached to a tip end of a suspension arm. In a magnetic head device for writing and / or reading information to and from the information recording surface of the disk-shaped recording medium, with the magnetic gap of the magnetic head element facing the information recording surface of the disk-shaped recording medium to be rotated, A gimbal spring for swingably supporting the magnetic head portion, and a pivot portion having a tip abutting on a substantially central portion of the gimbal spring and supporting a substantially central portion of the gimbal spring, facing the suspension arm of the pivot portion. At the base end to be fitted to a positioning portion formed substantially at the center in the width direction of the suspension arm, The serial pivot portion is characterized in that protrusions for positioning the substantially central portion in the width direction of the suspension arm is formed.

The magnetic head device according to the present invention configured as described above is provided in a recording and / or reproducing device such as a magnetic disk device, and the magnetic gap of the magnetic head element provided in the magnetic head portion is recorded and / or reproduced. Alternatively, information is written to and / or read from the disc-shaped recording medium facing the information recording surface of the disc-shaped recording medium mounted on the reproducing apparatus.

The magnetic head is mounted on the tip of the suspension arm while being supported by a gimbal spring so that it can swing. The gimbal spring has a substantially central portion supported by the tip of the pivot portion, and swings and displaces the magnetic head portion around a point supported by the tip of the pivot portion.

A protrusion for positioning the pivot portion with respect to the suspension arm is formed at a base end of the pivot portion facing the suspension arm. The protrusion formed at the base end of the pivot portion is fitted into a positioning portion such as a positioning hole formed at a substantially central portion in the width direction of the suspension arm. Thus, the pivot portion is positioned at a substantially central portion in the width direction of the suspension arm.

In this magnetic head device, as described above, the pivot portion is positioned substantially at the center of the suspension arm in the width direction, so that the swing fulcrum of the magnetic head portion, that is, the gimbal spring is moved by the tip of the pivot. Is the same as the point at which the right and left weight balance of the magnetic head device is maintained. Therefore, in this magnetic head device, the magnetic head portion appropriately swings and displaces following the surface runout of the disk-shaped recording medium, and maintains a good posture with respect to the disk-shaped recording medium. And / or reproduction can be performed stably.

Further, in a method of manufacturing a magnetic head device according to the present invention proposed to achieve the above-mentioned object, a gimbal spring having a substantially center portion supported by a tip portion of a pivot portion is provided at a tip portion of a suspension arm. In manufacturing a magnetic head device having a magnetic head portion attached thereto, a positioning portion is formed at a substantially central portion in the width direction of the suspension arm, and a pivot portion is formed at a base end portion of the pivot portion facing the suspension arm. The suspension arm of the pivot portion is formed by forming a projection, and fitting the projection formed at the base end of the pivot portion to a positioning portion formed at a substantially central portion in the width direction of the suspension arm. Is characterized by performing positioning with respect to.

According to the method of manufacturing the magnetic head device,
By fitting the protrusion formed at the base end of the pivot portion into the positioning portion formed on the suspension arm, the pivot portion can be positioned at substantially the center in the width direction of the suspension arm. The positioning of the portion with respect to the suspension arm can be performed accurately and easily.

[0032]

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, a first disk cartridge containing a first flexible disk on which data is recorded at a first recording density, a second recording density higher than the first recording density, Data is recorded in the second
Of applying the present invention to a magnetic head device provided in a magnetic disk device capable of selectively recording and / or reproducing data by using one of the second disk cartridges accommodating the flexible disk. It is. The magnetic head device according to the present invention is not limited to this example, and uses a magnetic head device provided in a magnetic disk device using one or three or more types of disk cartridges, or uses a magneto-optical disk as a recording medium. Needless to say, the present invention can be applied to a magnetic head device and the like provided in a magneto-optical disk device.

Disk Cartridge First, prior to the description of a magnetic disk device having a magnetic head device to which the present invention is applied, first and second disk cartridges used in the magnetic disk device will be described. Each of the magnetic disks housed in these disk cartridges is formed to have a diameter of 3.5 inches.

As shown in FIGS. 1 and 2, a first disk cartridge 1 stores a first flexible disk 2 having data recorded at a first recording density and having a recording capacity of about 2 megabytes. It is.

The first flexible disk 2 housed in the first disk cartridge 1 has a disk substrate 3 made of a synthetic resin having flexibility.
The magnetic recording layer is formed on both principal surfaces of the recording layer to form a signal recording section. A circular center hole is formed in the center of the disk substrate 3, and a hub 4 is attached so as to close the center hole.

The hub 4 is made of a magnetic material such as stainless steel or iron, and a cylindrical projection is fitted in the center hole, and a flange provided on the outer periphery of the projection is fitted to the periphery of the center hole. And is attached to the disk substrate 3. At the center of the hub 4 is formed a rectangular spindle hole 4a through which a spindle of a disk rotation driving mechanism provided on the magnetic disk device side is inserted, and the disk rotation driving mechanism is eccentric to the center. A drive pin engaging hole 4b having a rectangular shape with which the provided drive pin is engaged is formed.

The first flexible disk 2 formed as described above is rotatably stored in a cartridge body 7 formed by butt-connecting a pair of upper and lower halves 5, 6.

As shown in FIG. 2, a circular central opening into which a disk table constituting a disk rotation drive mechanism enters is provided at a substantially central portion on the lower surface side of the cartridge main body 7 in which the first flexible disk 2 is stored. 8 are provided. As shown in FIGS. 1 and 2, rectangular recording and / or reproducing openings 9 and 10 are provided at opposing positions on the upper and lower surfaces of the cartridge body 7, respectively. These recording and / or reproducing openings 9 and 10 are located at the center in the left-right direction of the cartridge body 7 and are formed from the vicinity of the center opening 8 to the front side of the cartridge body 7.

In the first flexible disk 2 housed in the cartridge body 7, a part of the signal recording portion faces outward over the inner and outer circumferences through the recording and / or reproducing openings 9, 10. Is done.

Further, at one corner on the back side of the cartridge body 7, as shown in FIGS. 1 and 2, an erroneous recording prevention hole 11 for restricting the overwriting of data on the stored flexible disk 2 is provided. Is provided. As shown in FIG. 1, the type of the flexible disk housed in the cartridge body 7 is provided in the other corner of the lower surface of the cartridge body 7 opposite to the side where the erroneous recording prevention hole 11 is provided. The disk identification hole 12 shown is provided. By detecting this disc identification hole 12,
It is identified that the flexible disk stored in the cartridge body 7 has a recording capacity of 2 megabytes.

On the lower surface side of the cartridge body 7,
As shown in FIG. 2, when the first disk cartridge 1 is mounted on a magnetic disk device, a positioning pin engaging hole for positioning the first disk cartridge 1 at a mounting position provided on the magnetic disk device side. 18, 19
Is provided. These positioning pin engagement holes 18, 1
As shown in FIG. 2, 9 is provided on both sides of the recording and / or reproducing openings 9 and 10.

The first disk cartridge 1 has the structure shown in FIG.
As shown in FIG. 2, a shutter member 13 for opening and closing the recording and / or reproducing openings 9 and 10 is attached. The shutter member 13 is formed in a U-shaped cross section by using a metal plate such as aluminum or stainless steel or by molding a synthetic resin, and has recording and / or reproducing openings 9 and 10 from the front side of the cartridge body 7. the fitted so as to cover, the direction of opening and closing these openings 9 and 10, that is movably mounted to FIGS. 3 and 4 in the arrow C ₁ direction and the arrow C ₂ direction.

The shutter members 13 extend on the upper and lower surfaces of the cartridge body 7 and have openings 9 and 1 for recording and / or reproduction.
Shutter portion 13a for covering the 0, the 13b, the shutter member 13 is moved in the arrow C ₁ direction in FIG. 1 and FIG. 2, the recording and / or when you move the opening 9 and 10 for reproduction in the open position opening These records and / or
Alternatively, rectangular cutout holes 14 and 15 for opening the openings 9 and 10 for reproduction are provided.

Note that the shutter member 13 is
3a and 13b are openings 9 and 10 for recording and / or reproduction.
To Figures 1 and 2 in the arrow C ₂ direction to close the, it is urged by a spring member (not shown) disposed in the cartridge body 7.

The second disk cartridge 21 is shown in FIG.
As shown in FIG. 4, data is recorded at a second recording density higher than the first recording density, and a second flexible disk 22 having a recording capacity of about 200 megabytes is stored. . The second disk cartridge 21 has the same size and thickness as the first disk cartridge 1 described above.

The second flexible disk 22 stored in the second disk cartridge 21 is the first flexible disk 22 described above.
As in the case of the flexible disk 2, a disk substrate 23 made of a synthetic resin having flexibility is provided, and a magnetic layer is applied to both main surfaces of the disk substrate 23 to form a signal recording portion. A circular center hole is formed in the center of the disk substrate 23, and a hub 24 is attached so as to close the center hole.

The hub 24 is made of a magnetic material such as stainless steel or iron, and has a cylindrical projection fitted in the center hole, and a flange provided on the outer periphery of the projection formed on the periphery of the center hole. And is attached to the disk substrate 23. A circular spindle hole 24a is formed in the center of the hub 24, through which a spindle of a disk rotation drive mechanism provided on the magnetic disk device side is inserted. The center of the hub 24 is eccentric to the disk rotation drive mechanism. A drive pin insertion hole 2 having a rectangular shape through which a drive pin to be provided is inserted.
4b is drilled.

The second flexible disk 22 formed as described above is rotatably housed in a cartridge body 27 formed by butt-connecting a pair of upper and lower halves 25 and 26.

At a substantially central portion on the lower surface side of the cartridge main body 27 in which the second flexible disk 22 is stored, FIG.
As shown in FIG. 2, a circular central opening 28 is provided in which a disk table constituting the disk rotation drive mechanism enters. As shown in FIGS. 3 and 4, rectangular recording and / or reproducing openings 29 and 30 are provided at opposing positions on the upper and lower surfaces of the cartridge main body 27. These recording and / or reproducing openings 29, 3
Numeral 0 is located at the center in the left-right direction of the cartridge main body 27 and is formed from the vicinity of the central opening 28 to the front side of the cartridge main body 27.

In the second flexible disk 22 stored in the cartridge body 27, a part of the signal recording portion faces outward through the inner and outer peripheries through the recording and / or reproducing openings 29 and 30. Is done.

Incidentally, the second flexible disk 2
Reference numeral 2 designates a signal recording unit up to the vicinity of the outer peripheral edge in order to realize a high capacity. The signal recording portion formed up to the vicinity of the outer peripheral edge of the second flexible disk 22 faces the outside of the cartridge body 27, and is used for recording and / or reproduction so that it can be accessed by the magnetic head on the magnetic disk device side. The openings 29, 30 are provided with the recording and / or reproducing openings 9, provided in the first disk cartridge 1 described above.
It is formed larger than 10. That is, the recording and / or reproducing openings 29 and 30 provided in the second disk cartridge 21 are formed to be enlarged to the vicinity of the front surface of the cartridge main body 27 as shown in FIG.

Further, at the other corner on the back side of the cartridge body 27, as shown in FIGS. 3 and 4, erroneous recording prevention for restricting overwriting of data on the second flexible disk 22 stored therein is performed. A hole 31 is provided. The erroneous recording prevention hole 31 is provided at a position opposite to that of the first disk cartridge 1. Further, as shown in FIG. 4, a detection hole 32 is provided in one corner of the lower surface of the cartridge body 27 opposite to the side where the erroneous recording prevention hole 31 is provided. The detection hole 32 is provided at a position where the erroneous recording prevention hole 11 of the first disk cartridge 1 is provided. When the detection hole 32 is mounted on a magnetic disk device using only the first disk cartridge 1, the detection hole 32 is provided in the magnetic disk device. A device which is detected by an erroneous recording detection mechanism provided, prohibits recording of data on the second flexible disk 22, and prevents data recorded on the second flexible disk 22 from being erased at high density. It is.

As shown in FIG. 4, the second disk cartridge 2
When the disk drive 1 is mounted on a magnetic disk drive, a positioning pin engaging hole 3 for positioning a mounting position provided on the apparatus side.
8, 39 are provided. These positioning pin engagement 3
8, 39 are provided so as to be located on both sides of the recording and / or reproducing openings 29, 30 as shown in FIG. As shown in FIG. 4, a disc identification hole 33 indicating the type of the flexible disk stored in the cartridge body 27 is provided on the lower surface of the cartridge body 27 so as to be adjacent to one of the positioning pin engagement holes 38 as shown in FIG. Is provided. By detecting the disk identification hole 33, it is determined that the flexible disk housed in the cartridge body 27 has a recording capacity of 200 megabytes.

Further, on the upper surface side of the cartridge body 27, it is located at one corner on the front side where the recording and / or reproducing openings 29 and 30 are provided, and regulates the insertion direction into the magnetic disk device. A groove 40 for preventing erroneous insertion is provided.

The second disk cartridge 21 records and / or writes data in the same manner as the first disk cartridge 1.
Alternatively, a shutter member 43 for opening and closing the openings 29 and 30 for reproduction is attached. This shutter member 43 is
Like the shutter member 13 of the first disk cartridge 1, it is formed by using a metal plate such as aluminum or stainless steel or by molding a synthetic resin.

The shutter member 43 provided in the second disk cartridge 21 has a size sufficient to close the recording and / or reproducing openings 29 and 30.
a, 43b. The shutter portions 43a, 43b are connected to each other, and the shutter supporting portions 44, 45 having a U-shaped cross section for supporting the shutter member 43 on the cartridge body 27 are provided on the shutter portions 43a, 43b. It protrudes from both sides on the base end side, and is formed so as to form a substantially T-shape as a whole.

By the way, the second disk cartridge 2
1, recording and / or reproducing openings 29, 3
0 is formed near the front surface of the cartridge main body 27 so that the signal recording portion formed near the outer peripheral edge of the second flexible disk 22 faces the outside of the cartridge main body 27. Recording and / or reproducing openings 9 and 1 provided in the disc cartridge 1 of FIG.
It is formed larger than 0. In order to reliably open the recording and / or reproducing openings 29 and 30 thus enlarged, the shutter member 43 is provided on one of the shutter support portions 44 of the shutter member 43 as shown in FIG. When the recording and / or reproducing openings 29 and 30 are moved to the positions where they are opened, the notch recesses 46 that open the front side of the cartridge body 27 of the recording and / or reproducing openings 29 and 30 are formed. Is formed. That is, the notch concave portion 46 is formed in a portion of the shutter support portion 44 extending to the upper and lower surfaces of the cartridge main body 27.

The shutter member 43 formed as described above
Is a shutter 43 from the front side of the cartridge body 27.
a, 43b are recording and / or reproducing openings 29, 30;
The shutter portions 43a, 4
FIGS. 3 and 4 show the opening and closing of the openings 29 and 30 by the opening 3b.
Movably mounted on the middle arrow C ₁ direction and the arrow C ₂ direction.

Note that the shutter member 43 is
3a, 43b are openings 29, 3 for recording and / or reproduction.
3 and 4 in the arrow C ₂ direction to close the 0, is urged by a spring member (not shown) disposed in the cartridge body 27.

Magnetic Disk Device Next, a first disk cartridge 1 containing a first flexible disk 2 for recording data at the first recording density configured as described above, and a first recording density Recording and / or reproducing data by selectively using one of the second disk cartridges 21 accommodating the second flexible disk 22 on which data is recorded at a second recording density having a high recording density. A description will be given of a magnetic disk drive that enables the above.

As shown in FIGS. 5 and 6, the magnetic disk device 50 has a device main body 53 formed by abutting a pair of upper and lower covers 51 and 52 formed by bending a thin metal plate into a U-shaped cross section. A base 54 formed by a metal plate, an aluminum die-cast, or the like is housed in the apparatus main body 53.

A front panel 55 made of a synthetic resin or the like is detachably mounted on the front side of the apparatus main body 53. On the upper edge side of the front panel 55,
A cartridge insertion / removal opening 56 having a size sufficient to allow the first or second disk cartridge 1 or 21 to be inserted horizontally with the front side to which the shutter members 13 and 43 are attached as an insertion end is provided. Cartridge slot 56
When the first or second disk cartridge 1 or 21 is not mounted in the apparatus main body 53,
3 is closed by an opening / closing lid 57 attached to the front panel 55 so as to be rotatable inward.

On the lower edge side of the front panel 54, there is provided an eject button 58 for operating an eject mechanism for ejecting the first or second disk cartridge 1, 21 mounted in the apparatus main body 53 from the apparatus main body 53. ing.

The base 54 provided in the apparatus main body 53 has the first or second magnetic disk 2 stored in the first or second disk cartridge 1, 21 mounted in the apparatus main body 53. A disk rotation drive mechanism 61 for driving the rotation of the disk 22 is provided. This disk rotation drive mechanism 6
As shown in FIG. 6, 1 includes a spindle motor 62 attached to a base 54, and a disk table 64 attached to a tip end of a spindle 63 of the spindle motor 62 so as to rotate integrally with the spindle 63. I have.

On the surface of the disk table 64 on which the first or second flexible disk 2, 22 is mounted, hubs 4, 24 attached to the flexible disks 2, 22 are provided.
Is attached to the magnet 65 for attracting the magnet. In addition, on the mounting surface side of the flexible disks 2 and 22 of the disk table 64, the drive pins engage with the drive pin engagement holes 4b or the drive pin insertion holes 24b provided in the hubs 4 and 24 at positions eccentric to the spindle 63. Drive pin 6 to be inserted
6 are protrudingly provided. The drive pin 66 is urged toward the outer peripheral side of the disk table 64 via an urging member such as a tension spring (not shown).

An electronic circuit board 70 is attached to the lower surface of the base 54. Various electronic circuits and detection switches are provided on the electronic circuit board 70.

The disk table 64 of the base 54
Is provided on the upper surface side thereof, a cartridge holder 71 constituting a cartridge holding member for holding the first or second disk cartridge 1 or 21 inserted into the apparatus main body 53 through the cartridge insertion opening 56. Has been established.

The cartridge holder 71 has cartridge holding portions 71a, 71b for holding both sides of the first or second disk cartridges 1, 21 inserted into the apparatus main body 53 on opposite sides, respectively. And it is formed in a thin housing shape whose lower side is open. The cartridge holder 71 holds the first or second disk cartridge 1 or 21 inserted into the apparatus main body 53 through the cartridge insertion / removal opening 56 and drives the disk by a cartridge loading mechanism incorporated in the base 54. The first or second disk cartridge 1, 21 held in the cartridge holder 71 is moved in the vertical direction between a position of the mechanism 61 separated from the disk table 64 and a position close to the disk table 64 side.
The first or second flexible disk 2 stored in
22 is loaded on the disk table 64 or the flexible disks 2 and 22 loaded on the disk table 64 are unloaded.

On the upper surface of the base 54, the cartridge holder 71 is positioned between the base 54 and the cartridge holder 71, and is moved up and down in a direction in which the cartridge holder 71 approaches and separates from the disk rotation drive mechanism 61 disposed on the base 54. An elevating operation plate 72 constituting a cartridge loading mechanism to be operated is provided.

As shown in FIG. 6, cam pieces 73, 7 having inclined surfaces are provided on both sides of the lift operation plate 72 opposite to each other.
4 is formed rising. These cam pieces 73, 7
Support pins 69 protruding from both sides of the cartridge holder 71 are mounted on the top of the cartridge holder 71. And the elevating operation plate 72
Is by a biasing member, not shown, is moved biased in direction of arrow X ₂ in FIG. Further, on the rear side of the base 54, when the lifting operation plate 72 is moved to the rear side of the direction of arrow X ₁ in FIG. 6, the lock for locking the lifting operation plate 72 is moved rearward position A lever 77 is provided.

[0072] Further, on the rear side of the base 54, although not shown, the ejecting motor is arranged to be operated to move the direction of arrow X ₁ in FIG. 6 against the urging force of the elevating operation plate 72 urging member Have been.

The elevating operation plate 72 is provided with the cartridge insertion / removal port 5.
When the insertion ready the first or second disc cartridge 1 or 21 into the apparatus main body 53 through 6 are moved operated by 6 in the direction of arrow X ₁ ejecting motor, the rear side of the base 54 Has been moved to the position. At this time, the elevating operation plate 72 is locked by the lock lever 77 and is held at a position moved to the rear side of the base 54. When the elevating operation plate 72 is locked by the lock lever 77, the cartridge holder 71 supports the support pin 69 on the upper surface side of the cam pieces 73 and 74 of the elevating operation plate 72, and It is held at a raised position separated from the table 64.

When the cartridge holder 71 is held at the raised position, the open end on the front side is placed so as to face the cartridge insertion opening 56. Here, when the first or second disk cartridge 1 or 21 is inserted into the cartridge holder 71 through the cartridge insertion opening 56, the lock lever 77 is rotated by the first or second disk cartridge 1 or 21. You. When the first or second disk cartridge 1 or 21 is inserted to the cartridge insertion position in the cartridge holder 71, the lock of the lock lever 77 to the lifting operation plate 72 is released.

[0075] lifting operation plate 72, the lock by the lock lever 77 is released, in FIG. 6 receives the biasing force of the biasing member is operated to move direction of arrow X _2. When the lifting operation plate 72 is moved in the direction of arrow X ₂ in FIG. 6, the support pin 69 moves along the inclined surface of the cam piece 72 and 73, the cartridge holder 71 of FIG. 6 in the arrow L ₁ direction of the base 54 side The cartridge holder 71 is lowered to the disk table 64 side.
The first or second disk cartridge 1 held in the
21 is a cartridge mounting portion 7 configured on a base 54
5 and the first or second flexible disk 2, 22 stored in the first or second disk cartridge 1, 21 is loaded onto the disk table 64. At this time, the first or second flexible disk 2 or 22 is
The drive pin 66 is inserted through the spindle holes 4a, 24a provided in the drive pin 24 and the drive pin engagement hole 4b or the drive pin insertion hole 24b.
b, the hubs 4, 24 are attracted by the magnet 65 and placed on the disk table 64, and become rotatable integrally with the disk table 64.

Here, when the spindle motor 62 is driven, the first or second flexible disk 2, 22 is driven to rotate integrally with the disk table 64.

The first flexible disk 2 is
By being driven to rotate integrally with the disk table 64, the drive pin 66 is pressed against one side surface on the outer peripheral side of the drive pin engagement hole 4 b, so that the corner of the rectangular spindle hole 4 a is The centering of the spindle 63 is adjusted so that the center of rotation coincides with the center of rotation of the spindle 63.

The cartridge mounting section 75 has the first
Alternatively, positioning pins are provided which are relatively engaged with positioning pin engagement holes 18, 19 or 38, 39 provided in the second disk cartridges 1, 21. These positioning pins engage with the positioning pin engagement holes 18, 19 or 38, 39, so that the horizontal direction and height direction of the first or second disk cartridge 1, 21 mounted on the cartridge mounting portion 75 can be adjusted. Is positioned.

First or second flexible disk 2,
When the disc cartridge 22 is loaded on the disc table 64, the first and second disc cartridges 21 and 21 are positioned in the horizontal and height directions by the positioning pins and are mounted on the cartridge mounting portion 75.
The first or second flexible disk 2, 22 is located at a substantially intermediate position between the upper and lower surfaces of the cartridge bodies 7, 27 and is driven to rotate so as not to contact the upper and lower inner surfaces of the cartridge bodies 7, 27.

When the shutter members 13 and 43 provided on the first or second disk cartridges 21 and 21 are inserted into the cartridge holder 71, the lock lever 77 is locked.
The recording and / or reproducing openings 9, 10 or 29, 30 are moved in a direction to open the recording and / or reproducing openings 9 by a shutter member opening pin 78 provided integrally therewith.
Release 9, 30.

The first or second flexible disk 2,
The first or second cartridge mounted on the cartridge mounting portion 75 so that the cartridge 22 is loaded on the disk table 64.
In order to eject the disc cartridges 1 and 21 from the apparatus main body 53, an eject button 58 provided on the front panel 54 is operated. When the eject button 58 is operated, the ejecting motor is driven, the lifting operation plate 72 by the motor is moved during operation 6 in the arrow X ₁ direction against the biasing force of the biasing member. The lifting operation plate 72 is shown in FIG.
Once moved to the intermediate direction of arrow X _1, the support pin 69 moves along the inclined surface of the cam piece 72 and 73, upward in the direction in which the cartridge holder 71 is separated from 6 in the arrow L ₂ direction of the base 54 , The first or second disk cartridge 1, 21 is raised from the cartridge mounting portion 75 formed on the base 54, and the first or second flexible disk 2, 22 is unloaded from the disk table 64. .

When the cartridge holder 71 is moved to the raised position away from the base 54, the lock lever 77 is rotated, and the first or second disk cartridge 1, 21 held by the cartridge holder 71 is moved to the cartridge holder 71. Is pressed in the direction of discharging from the cartridge, and a part thereof is projected from the cartridge insertion / removal opening 56.

When the lock lever 77 is rotated to press the first or second disk cartridge 1 or 21 in the direction of being ejected from the cartridge holder 71, the lock lever 77 engages with the elevating operation plate 72, holding the plate 72 to the eject position is moved in FIG. 6 the arrow X ₁ direction against the biasing force of the biasing member.

As shown in FIG. 6, the operator is projected on the upper surface of the base 54 on the electronic circuit board 70 provided on the lower surface of the base 54 provided in the apparatus main body 53. And the first or second disk cartridge 1 or 2
1, a disc-in detection switch 81 for detecting whether or not the disc cartridge 1 is mounted, and a first or second disc cartridge 1,
First and second erroneous recording prevention detection switches 82, 8 for detecting whether or not the erroneous recording prevention holes 11, 31 provided in the opening 21 are open.
3 are provided. Also, on the electronic circuit board 70,
As shown in FIG. 6, a disk capacity detection switch 84 for detecting the disk identification hole 33 provided in the second disk cartridge 21 is provided. The disk capacity detection switch 84 is provided at a position corresponding to the disk identification hole 33 provided in the second disk cartridge 21 mounted on the cartridge mounting section 75.
The capacity of the magnetic disk housed in the disk cartridge is detected by detecting the presence or absence of a disk identification hole provided in the disk cartridge mounted on the disk cartridge 5.

Further, on the electronic circuit board 70, a light emitting display 85 for displaying the operating state of the magnetic disk device 50 is provided. The light-emitting display 85 has a display unit having a front panel 55 attached to the front side of the apparatus main body 53.
The operation state of the magnetic disk device 50 is displayed by exposing to the outside through an opening provided in the magnetic disk device 50 and emitting or extinguishing the light according to the operation state of the magnetic disk device 50.

On the base 54, a disk table 64 is provided.
Data recording and / or reproduction is performed by accessing signal recording portions formed on both main surfaces of the first or second flexible disk 2 or 22 loaded on the disk table 64 and rotated integrally with the disk table 64. Magnetic head device 1
00 is provided. Hereinafter, the magnetic head device 10
0 will be described in detail.

[0087] The magnetic head device a magnetic head device 100, as shown in FIG. 6, located on the inner side of the apparatus main body 53, a first or second disc cartridge 1 or 21 is attached to the main body 53 They are arranged to face each other. Then, the magnetic head device 100
Is the first loaded on the disk table 64
Alternatively, first and second head support arms 102 and 103 are respectively provided on both main surfaces of the second flexible disks 2 and 22 on which signal recording portions are formed, and the tips of the head support arms 102 and 103 are provided. First or second on the side
Magnetic head unit 10 for accessing signal recording units formed on both main surfaces of flexible disks 2 and 22, respectively.
5,105 are attached.

The magnetic head device 100 according to the present invention will be described in more detail. As shown in FIGS. 7 to 9, the magnetic head device 100 has magnetic head portions 105, 105.
And second head support arms 102, 1 supporting
03 are connected, and these head support arms 102, 10
And a head carriage main body 106 which is moved in the radial direction of the first or second flexible disk 2 or 22 loaded on the disk table 64 integrally with the disk table 64.

The head carriage main body 106 is formed using a synthetic material such as a synthetic resin, aluminum, or a magnesium alloy. Head carriage body 1
Reference numeral 06 is supported by a main guide shaft 107 and a sub guide shaft (not shown) disposed on the base 54 in parallel with the radial direction of the first or second flexible disk 2 or 22 loaded on the disk table 64. I have. A pair of coil support pieces 108 and 109 are provided on both sides of the base end of the head carriage body 106 so as to project therefrom.
Drive coils 110 and 111 that are inserted through the yoke of a voice coil motor (not shown) disposed on the base 54 are attached via 08 and 109. When a drive current is supplied to the drive coils 110 and 111, the head carriage body 106
4 is moved in the radial direction of the first or second flexible disk 2 or 22 loaded on the disk.

The first and second head supporting arms 102 and 103 connected to the head carriage main body 106 are connected to the connecting plate 11 serving as a connecting portion to the head carriage main body 106.
2 and a head support spring 113 attached to the distal end side of the connection plate 112. Connecting plate 112
Is formed using a synthetic material such as a synthetic resin, aluminum, or a magnesium alloy.
13 is formed using a leaf spring.

As shown in FIG. 7, the head support spring 113 is formed in a substantially triangular shape tapering toward the distal end, and the magnetic head 105 is attached to the distal end, and the connecting plate is connected to the base end. Fixing screw 114
It is fixed using.

[0092] On both ends in the width direction of the head support spring 113, return ribs 115 are formed so as to stand substantially perpendicularly to the main surface 113a of the head support spring 113. The folded rib 115 is used for the head supporting spring 11.
The head support spring 113 is formed by raising both ends in the width direction of the leaf spring constituting the third spring 3 in a direction substantially perpendicular to the main surface 113a of the head support spring 113. Head support spring 113
As described above, the folded ribs 115 are formed at both ends in the width direction to improve the strength.

The connecting plate 112 constituting the first head supporting arm 102 is integrally extended from one side of the lower end side of the head carriage main body 106. That is, as shown in FIG. 10, the first head support arm 102 is fixed to the head carriage main body 106, and is below the first or second flexible disk 2, 22 loaded on the disk table 64. Extending towards the main surface of the side.

On the other hand, the second head support arm 103
The magnetic head unit 105 attached to the front end side is rotatable in the direction indicated by the arrow E in FIG. 10 and the direction indicated by the arrow F in FIG. Supported. That is, the second head support arm 103 is
2 by engaging a pair of supporting shafts (not shown) projecting from both sides on the base end side with shaft engaging grooves (not shown) formed on the upper end surface side of the head carriage main body 106.
The direction of arrow E in FIG. 10 and FIG.
It is attached to be rotatable in the direction of the middle arrow F.

The second head support arm 103 is rotated in the direction of arrow E in FIG. 10 and in the direction of arrow F in FIG. 11 in conjunction with the above-mentioned elevation operation of the cartridge holder 71 with respect to the base 54. Second head support arm 103
Are locking pieces 11 protruding from both sides on the distal end side of the connecting plate 112.
As shown in FIG. 6, as shown in FIG. 6, the locking members 7, 117 are locked on both sides of the magnetic head device entry opening 118 formed in the cartridge holder 71, so as to interlock with the elevation of the cartridge holder 71. It is rotated in the direction of arrow F in FIG.

The second head support arm 103 is
As shown in FIG. 8, the torsion coil spring 1 disposed between the connecting plate 112 and the head carriage main body 106
20, the magnetic head portion 105 on the distal end side is urged to rotate in the direction of arrow E in FIG. 10 which is close to the magnetic head portion 105 on the first head support arm 102 side.

As shown in FIG. 8, a torsion coil spring 120 for rotatingly urging the second head support arm 103 is provided on a support plate 122 attached to the upper end surface of the head carriage main body 106 via a fixing screw 121. And is prevented from falling off from the head carriage main body 106.

Then, the second head support arm 103
When the cartridge holder 71 is lifted from the base 54 and raised to an eject position where the first or second disk cartridges 1, 21 can be inserted and removed, the arrow F in FIG. Pivoted in the direction.

Further, the second head support arm 103
The first or second disk cartridge 1 or 21 is inserted into the cartridge holder 71, and the cartridge holder 71
Is lowered toward the base 54, the torsion coil spring 12
Upon receiving the urging force of 0, the cartridge holder 71 is rotated in the direction of arrow E in FIG. When the second head support arm 103 is rotated in the direction of arrow E in FIG.
03, the magnetic head unit 105 attached to the tip side
As shown in FIG. 10, the recording medium enters the first or second disk cartridge 1, 21 held by the cartridge holder 71 via the recording and / or reproducing opening 9, 10, or 29, 30 opened. Then, it comes into contact with the upper main surface of the first or second flexible disk 2 or 22 loaded on the disk table 64.

The cartridge holder 71 descends to the base 54 side, and the first holder held by the cartridge holder 71
Alternatively, the second disk cartridges 1 and 21
When the magnetic head unit 105 is mounted on the cartridge mounting unit 75 configured above, the magnetic head unit 105 mounted on the distal end side of the first head support arm 102 is held by the cartridge holder 71 as shown in FIG. In the first or second disk cartridges 1, 21, released recording and / or
Alternatively, it enters through the openings 9, 10 or 29, 30 for reproduction and comes into contact with the lower main surface of the first or second flexible disk 2, 22 loaded on the disk table 64.

On the back side of the magnetic head device 100, FIG.
As shown in FIG. 7, data to be recorded on the first flexible disk 2 or the second flexible disk 22 is supplied to the magnetic head unit 105 by the magnetic head unit 105 or the first A recording / reproducing I for supplying data read from the flexible disk 2 or the second flexible disk 22 to a signal processing circuit (not shown) provided on the electronic circuit board 70.
A C circuit 123 is provided. The recording / reproducing IC circuit 123 has an electronic component such as an IC chip mounted on a flexible wiring substrate having flexibility, and is mounted on the carriage body 106 on the back surface side of the magnetic head device 100 with an adhesive or the like. Installed. The recording / reproducing IC circuit 123 includes a connector (not shown), and is connected to a signal processing circuit (not shown) provided on the electronic circuit board 70 via the connector.

The first and second head support arms 1
As shown in FIG. 7 to FIG. 9, on the tip end side where the magnetic head portions 105 and 105 of the magnetic head portions 02 and 103 are mounted, on the head support spring 113 and on the magnetic head portion 105 supported by the head support spring 113. , A flexible wiring board 124 having flexibility is attached.

The flexible wiring board 124 serves as a relay board between the recording / reproducing IC circuit 123 and the magnetic head section 105, and is formed, for example, to have a substantially E-shape as a whole. As shown in FIGS. 7 to 9, the flexible wiring board 124 is attached so that a part thereof is located on the head support spring 113 and another part is located on the magnetic head part 105. I have.

The magnetic head unit 105 is configured such that one end of a wire constituting a coil is soldered to a terminal area of the flexible wiring board 124 so that the flexible wiring board 124, the connecting wire 125, and the recording / reproducing IC circuit 12 are formed.
Through 3, it is connected to a signal processing circuit (not shown) provided on the electronic circuit board 70.

[0105] The magnetic head unit Next, the first and second head supporting arm 102, 103
The magnetic head unit 105 attached to the front end of the magnetic head will be described in detail. Since the magnetic head units 105 attached to the distal ends of the head support arms 102 and 103 have a common configuration, only one of them will be described in the following description.

As shown in FIG. 12, the magnetic head unit 105 used in the magnetic disk drive according to the present invention has a low-capacity recording capacity, and the low-density first flexible disk 2 is a disk table 64. When loaded on the first flexible disk 2, a first head chip 131 used for recording and / or reproducing data on and from the first flexible disk 2 and a high recording density type When the second flexible disk 22 is loaded on the disk table 64, a head slider incorporating a second head chip 132 for high recording density for recording and / or reproducing data on the second flexible disk 22 133 is provided.

As shown in FIG. 12, a magnetic head 10 is provided on the base end surface of the head slider 133 opposite to the surface facing the first or second flexible disk 2 or 22.
5 is provided, and a first core portion 138 including a core forming member 135 and first and second bobbins 139 and 140 attached to both sides of the core forming member 135 is provided. First and second parts constituting the first core part 138
As shown in FIG. 12, first and second coils 141 and 142 are wound around the bobbins 139 and 140.

The head slider 133 constituting the magnetic head unit 105 includes a first slider unit 146 in which the second head chip 132 is incorporated, and a first slider unit 1
46 and the first head chip 131
And a third slider portion 148 disposed so as to sandwich the first head chip 131 together with the second slider portion 147. That is, as shown in FIGS. 12 and 13, the head slider 133 has the first slider 146 and the first head chip 13 on both sides of the second slider 147 disposed at the center.
1 respectively, and further, the first head chip 131
The third slider portion 137 is joined to the side surface of.

On the surface of the head slider 133 facing the first or second flexible disk 2 or 22, a magnetic head portion 105 constituted by using the head slider 133 is provided with a first and second head support arms. 102,10
3, the two rail portions 149 are substantially parallel to the tangential direction R of the recording tracks formed on the first and second flexible disks 2 and 22 shown in FIG. , 150 are formed parallel to each other. The rail portions 149 and 150 are provided by the second flexible disk 22 in a direction indicated by an arrow R in FIG.
When rotated at a rotation speed of about 00 rpm, this second
An air film is formed between the head slider 133 close to the flexible disk 22 and the second flexible disk 22, and has a function of floating the head slider 133 from the main surface of the second flexible disk 22.

When the flexible disks 2, 22 loaded on the disk table 64 and driven to rotate integrally with the disk table 64 rotate in the direction of arrow R in FIG. 12, the flexible disks 2, 22 of the rail portions 149, 150 are rotated. As shown in FIG. 12, front taper portions 151 and 151 are formed on the side where
2, 152 are formed. Front taper part 15
When the head slider 133 is in contact with the main surfaces of the flexible disks 2 and 22 in parallel, the head 151 has an inclination angle of, for example, about 0.5 ° with respect to the main surfaces of the flexible disks 2 and 22. The rear tapered portions 152 and 152 are formed on the main surfaces of the flexible disks 2 and 22 so as to have an inclination angle of, for example, about 10 ° with respect to the surface.

The first head chip 131 constituting the head slider 133 is provided with a recording / reproducing head unit 153 and an erasing head unit 154 near substantially the center in the longitudinal direction. The erasing head unit 154 is provided at a position downstream of the recording / reproducing head unit 153 in the rotation direction of the flexible disk 2, 22 when the flexible disk 2, 22 rotates in the direction of arrow R in FIG. I have.

The recording / reproducing head section 153 provided on the first head chip 131 has a magnetic gap G1 having a width slightly larger than the track width of the recording track formed on the first flexible disk 2. The erasing head 154 is located downstream of the magnetic gap G1 of the recording / reproducing head 153 in the rotation direction of the first flexible disk 2, and is located at both ends in the width direction of the magnetic gap G1. The portions have magnetic gaps G2 and G3.

The first head chip 131 for recording / reproducing data on / from the first flexible disk 2 has the first
When data is recorded on the flexible disk 2, the magnetic gap G1 of the recording / reproducing head unit 153 is used.
Data is recorded on the first flexible disk 2 by using the magnetic gaps G2 and G2 of the erasing head unit 154.
By G3, a guard band is formed between adjacent recording tracks by erasing a certain width on both sides in the width direction of a recording track formed by recording data by the recording / reproducing head unit 153. ing.

As the second head chip 132 incorporated in the first slider section 146 constituting the head slider 133, for example, a MIG (Metal in Gap) head is used, and the above-described recording / reproducing head section is used. It has a magnetic gap capable of forming a recording track narrower than 153. The first slider portion 146 is formed by embedding the second head chip 132 in a head slider 133 formed using ceramics or the like.

As shown in FIGS. 12 and 14, a notched concave portion for exposing a part of the second head chip 132 to the outside is provided in the first slider portion 146 in which the second head chip 132 is incorporated. 155 are formed. In the notched recess 155, a part of a portion constituting a second core portion, which is a magnetic core of the second head chip 132, faces outward. As shown in FIG. 14, a coil 156 for the second head chip 132 is wound around a part of the second head chip 132 facing outward through the notch recess 155. I have.

Coil 15 for second head chip 132
6 is formed to be small in size corresponding to the small second head chip 132. Then, the second head chip 132
The one end of the wire constituting the coil 156 for recording is connected to the recording / reproducing IC circuit 123 and the magnetic head 10 as described above.
5 is soldered to the terminal area of the flexible wiring board 124 which will be a relay board.

As shown in FIG. 12, the core forming member 135 attached to the head slider 133 has a substantially U-shaped connecting portion 157 made of a magnetic material and a substantially U-shaped connecting portion formed on the end of the connecting portion 157. First and second leg portions 145 and 160 made of a non-magnetic material that is vertically arranged;
7 is provided with third, fourth, and fifth legs 161, 162, and 163, which are made of a magnetic material and erected substantially vertically on one side. Here, the third and fifth legs 161 and 165 are located upright at the corners of the connecting portion 157, and the fourth leg 162 is composed of the third leg 161 and the fifth leg 161. 163. A groove 164 is formed on the upper end surface of the fourth leg 162 facing the head slider 133, and the first and second protrusions 16 are formed on both sides of the groove 164.
5,166 are formed.

A first bobbin 139 which is formed in a cylindrical shape and has flange portions 139a and 139b at both ends is attached to the core forming member 135, and a first coil 141 is mounted on a peripheral surface of the bobbin 129. Is wound.
The first bobbin 139 has a through hole 139c at the center thereof corresponding to the third leg 161 so that the third leg 161 can be inserted therethrough.

Further, like the first bobbin 139, the core forming member 135 has a second bobbin 140 which is formed in a cylindrical shape and has flange portions 140a and 140b at both ends.
The bobbin 140 is provided with a second coil 1
42 are wound. The second bobbin 140 has a through hole 140c at the center thereof corresponding to the fifth leg 163 so that the fifth leg 163 can be inserted therethrough.

The first bobbin 139 and the second bobbin 140 are connected to the first and second coils 141 and 141, respectively.
With the 142 wound, the through-holes 139c and 140c are inserted into the third and fifth legs 161 and 163, and attached to both sides of the core forming member 135 so as to face each other. Constitute.

Note that one end of a wire constituting the first coil 141 wound around the first bobbin 139 and one end of a wire constituting the second coil 142 wound around the second bobbin 140 Is soldered to the second terminal area 127 of the flexible wiring board 124 or the terminal area 130 of the flexible wiring board 128, which serves as a relay board between the recording / reproducing IC circuit 123 and the magnetic head unit 105, as described above. .

The first core portion 138 is provided in the same manner as in FIGS.
As shown in FIG.
Of the legs 159 to 163 of the head slider 133
The first and second flexible disks 2 and 22 are brought into contact with the lower surface opposite to the surface facing the first and second flexible disks 2 and 22, and are joined to and integrated with the head slider 133 using an adhesive such as an epoxy resin. At this time, the first and second legs 1
As shown in FIG. 14, 59 and 160 are in contact with the vicinity of both ends of the first slider portion 146 constituting the head slider 133. The third leg 161 has a head slider 133 such that the tip end surface is magnetically coupled to the recording / reproducing head 153 constituting the first head chip 131.
And the fifth leg 163 has a tip end surface on which the erasing head 15 constituting the first head chip 131 is formed.
4 is brought into contact with the lower surface of the head slider 133 so as to be magnetically coupled to the head slider 133. Furthermore, the fourth leg 162 is
The tip of the first projection 165 is magnetically coupled to the recording / reproducing head 153, and is located between the recording / reproducing head 153 and the erasing head 154, and the tip of the second projection 166. The surface is in contact with the lower surface of the head slider 133 so that the surface is magnetically coupled to the erasing head portion 154.

The contact between the first core portion 138 and the head slider 133 in this way allows the third leg portion 1
61 and the fourth leg 162 are the recording / reproducing head 153.
Of the magnetic core. That is, in the recording / reproducing head 153, a magnetic path is formed between the third leg 161 to which the first coil 141 is attached and the first protrusion 165 of the fourth leg 162. The first core portion 138 and the head slider 133 are brought into contact with each other, so that the fifth leg portion 163 and the fourth leg portion 162 are connected to the erasing head portion 15.
4 constitute the magnetic core. That is, the erasing head unit 1
54 is a second projection 1 provided on the fifth leg 163 to which the second coil 142 is attached and the fourth leg 162.
66, a magnetic path is formed.

The magnetic head device 100 is provided with a gimbal spring 171 for swingably supporting the magnetic head portion 105 configured as described above on the distal ends of the first and second head support arms 102 and 103. ing. The gimbal spring 171 is formed by punching a thin metal plate such as a stainless steel plate or phosphor bronze, and is formed in a flat rectangular shape as shown in FIG. A head mounting portion 172 to which a head slider 133 is mounted is provided.

The gimbal spring 171 has a first annular frame portion 173 surrounding the outer periphery of the head mounting portion 172.
Are formed. The head mounting portion 172 includes a pair of first connecting portions 17 protruding from opposite sides in the short side direction.
4 and 175 are connected to the first annular frame portion 173. The head mounting portion 172 includes first connecting portions 174, 1
Rotational displacement is possible with the rotation axis 75.

The gimbal spring 171 further includes a second annular frame 1 surrounding the outer periphery of the first annular frame 173.
76 are formed. The first annular frame portion 173 includes a pair of second connecting portions 177 protruding from opposite sides in a long side direction orthogonal to the short side direction in which the pair of first connecting portions 174 and 175 are provided. , 178 are connected to the second annular frame portion 176. The first annular frame portion 173 is provided with the second connecting portions 177 and 178 together with the head mounting portion 172.
Can be rotated about the axis of rotation.

When this gimbal spring 171 is incorporated in the magnetic head unit 105 and attached to the magnetic head device 100, the connection direction of the first connection units 174, 175 is formed on the first or second flexible disk 2, 22. Is parallel to the tangential direction R of the recording track to be recorded.

The head mounting portion 172 formed on the gimbal spring 171 has a tangential direction R of a recording track formed on the first or second flexible disk 2 or 22.
The pair of first and second openings 179 and 18 are parallel to the connection direction of the first connection portions 174 and 175,
0 is formed.

Gimbal spring 17 formed as described above
1 is attached to the magnetic head unit 105 including the head slider 133 and the first core unit 138. Specifically, the gimbal spring 171 is mounted between the head slider 133 and the first core 138. At this time,
The head slider 133 positions the first slider portion 146 in the first opening 169, and the first head chip 13
1 is located in the second opening 170 and the gimbal spring 17
It is mounted on one head mounting portion 172.

Then, the first core portion 138 inserts the first and second legs 149, 150 of the core forming member 135 into the first opening 179, and connects the distal end surfaces of these legs 149, 150. Abutting against the lower surface of the first slider portion 146,
The third to fifth core forming members 135 are formed in the second openings 180.
Through the legs 151, 152, 153,
The tip surfaces of the fifth legs 151, 152, and 153 are brought into contact with the lower surface of the first head chip 131 to be integrated with the head slider 133. Also in this case, the core forming member 1
Reference numeral 35 is bonded to and integrated with the head slider 133 using an adhesive such as an epoxy resin.

The magnetic head unit 105 includes a gimbal spring 17.
A head slider 133 is attached to one surface of the first gimbal spring 171, and the core forming member 135 of the first core portion 138 is integrally formed by abutting the head forming member 135 on the head slider 133 from the other surface of the gimbal spring 171. That is, in the magnetic head unit 105, the gimbal spring 171 is provided at a position between the head slider 133 and the first core unit 138 in the middle of the magnetic head unit 105 in the height direction.

The magnetic head 105 is provided with a gimbal spring 1 on the distal end surface of a spacer 181 attached to the distal ends of the first and second head support arms 102 and 103.
71, the second annular frame portion 176 is joined, and the first and second
Are supported by the head support arms 102 and 103 of FIG.

The magnetic head 105 is connected to the head support arm 1
Spacer 18 for attaching to the tip side of 02, 103
As shown in FIGS. 18 to 21, 1 has a spacer main body 182 formed in a rectangular tubular shape. The spacer body 182 is formed in a cylindrical shape large enough to house the first core portion 138 of the magnetic head portion 105,
The gimbal spring 171 is formed to have substantially the same size as the second annular frame portion 176.

A pivot 183 for supporting a substantially central portion of the gimbal spring 171, specifically, a substantially central portion of the head mounting portion 172 of the gimbal spring 171 is provided on one side of the distal end portion side of the spacer main body 182. , The spacer body 1 so as to project toward the center of the spacer body 182.
82 are formed integrally.

As shown in FIG. 18, a pivot 184 having a substantially hemispherical outer shape is provided at the tip of the pivot 182 located on the gimbal spring 171 side so as to protrude toward the gimbal spring 171. This pivot 184
The tip is formed so as to have a height slightly protruding from a spring attachment surface 182a to which the gimbal spring 171 on the tip end side of the spacer body 182 is attached.

The pivot portion 183 is provided with a gimbal spring 171.
When the gimbal spring 171 is attached to the spacer 181, the pivot 184 is brought into contact with a substantially central portion of the head attachment portion 172 of the gimbal spring 171 to thereby provide the gimbal spring 171.
Of the head mounting portion 172 is supported. The head mounting portion 172 of the gimbal spring 171 has a substantially central portion supported by the pivot portion 183 at one point, so that the substantially central portion where the pivot 184 contacts is used as a fulcrum, and a pair of first connecting portions 174 and 174 are provided. 175 and the pair of second connecting portions 177 and 178 are pivotally displaced in two axial directions orthogonal to each other with the pivots as pivot axes. Thus, the head slider 1 attached to the head attachment portion 172 of the gimbal spring 171
The first core portion 138 joined to the head slider 33 and the head slider 133, that is, the magnetic head portion 105 can be oscillated.

The base end of the pivot portion 182, that is, the side facing the first and second suspension arms 102, 103 when the spacer 181 is attached to the first and second suspension arms 102, 103. The positioning projection 185 for positioning the pivot portion 182 and the spacer body 182 integrally formed with the pivot portion 182 with respect to the first and second suspension arms 102 and 103 includes a first and a second. Are provided so as to protrude toward the suspension arms 102 and 103. As shown in FIGS. 19 to 21, the positioning projection 185 is formed, for example, so as to form a substantially hemispherical outer shape, and pivots such that its distal end slightly projects from the base end surface of the spacer body 182. It is formed on the base end side of the portion 182.

The positioning projection 185 has its center in a direction perpendicular to the gimbal spring 171 attached to the spacer body 182.
4 is formed so as to be substantially coincident with the center. That is, when the pivot portion 182 is projected on a plane, the center of the positioning protrusion 185 formed at the base end thereof and the center of the pivot 184 formed at the front end thereof coincide with each other. A relative position between the pivot 185 and the pivot 184 is set.

As shown in FIGS. 22 to 24, the spacer 181 configured as described above has
5 is mounted. The gimbal spring 171 has the head slider 133 attached to one surface side facing upward, and the other surface side of the second annular frame portion 176 is joined to the spring attachment surface 182a on the distal end side of the spacer body 182, and the head attachment portion Pivot 172
It is placed on the top of the spacer 84 and attached to the distal end side of the spacer 181. Thus, the gimbal spring 171 is connected to the spacer 18.
By attaching to the first part, a substantially central part of the head mounting part 172 is supported by a pivot 184 having a height slightly protruding from the spring mounting surface 182a.

As shown in FIG. 25, the spacer 181 to which the gimbal spring 171 is attached has the base end face opposite to the tip end face to which the gimbal spring 171 is attached, as shown in FIG. , 103
Attach to the tip. At this time, the spacer 181
26 to 28, the pivot 183 is provided with a positioning projection 185 formed at the base end.
Into the positioning holes 186 provided in the first and second head support arms 102 and 103,
Positioning with respect to the first and second head support arms 102 and 103 is achieved.

As shown in FIGS. 26 and 27, the positioning holes 186 are provided in the first and second suspension arms 10.
2 and 103 are provided at a substantially central portion in the width direction thereof. The magnetic head device 100 includes first and second magnetic head devices.
Is designed so that the right and left weight balance is maintained at the center in the width direction of the suspension arms 102 and 103 of the suspension arm 102, 103. Therefore, the pivot 183 has a positioning projection 185 provided at the base end thereof. Positioning holes 1 provided in first and second suspension arms 102 and 103
86, the magnetic head device 100 is positioned at a position where the left and right weight balance of the magnetic head device 100 is maintained.

Here, as described above, the pivot 183 is connected to the center of the positioning projection 185 and the pivot 184.
Is formed at a position substantially coincident with the center of the gimbal spring 171 in the direction perpendicular to the gimbal spring 171. Therefore, the pivot 184 is connected to the magnetic head device 1.
00 comes into contact with the approximate center of the head mounting portion 172 of the gimbal spring 171 at a position where the right and left weight balance is maintained, and the head mounting portion 172 of the gimbal spring 171 is moved to the left and right weight balance of the magnetic head device 100. With the position where the balance of
It is rotationally displaced in the axial direction. Thereby, the gimbal spring 1
The head slider 133 attached to the 71 head attachment portion 172 and the first core portion 138 joined to the head slider 133, that is, the magnetic head portion 105, maintain the balance of the right and left weight balance of the magnetic head device 100. The rocking displacement is made possible by using the position to be rocked as the rocking fulcrum.

The magnetic head 10 constructed as described above
The first or second flexible disk 2, 22 on which data is written and / or read out according to 5 is loaded on the disk table 64 and driven to rotate due to unevenness of the flatness of the disk itself. Surface runout may occur.

However, the above-described magnetic head 10
5, the first and second head chips 131, 1
32, and a first core portion 138 joined to the head slider 133, that is, a magnetic head portion 105, can swing with respect to the first and second head support arms 102 and 103. Therefore, even if the first or second flexible disk 2 or 22 has run out, the head slider 133
The first core part 138 displaces the attitude of the first and second head support arms 102 and 103 so as to follow the surface deflection of the first or second flexible disk 2 or 22.

In particular, the magnetic head device 100 according to the present invention
, The magnetic head unit 105 is
Since the position where the balance of the right and left weight balances of 00 is maintained is used as the swing fulcrum, the swing displacement is enabled.
Alternatively, even when a relatively large runout occurs in the second flexible disks 2 and 22, the magnetic head unit 105 is controlled to follow the runout of the first or second flexible disks 2 and 22. The posture can be appropriately displaced.

As a result, the magnetic head unit 105 can accurately record the recording tracks formed on the signal recording unit of the first flexible disk 2 or the second flexible disk 22 loaded on the disk table 64 of the magnetic disk device 50. Access to enable stable writing of data to the first or second flexible disk 2 or 22 or stable reading of data from the first or second flexible disk 2 or 22 Can be.

Also, the magnetic head device 100 according to the present invention
As described above, by fitting the positioning projection 185 provided on the pivot portion 183 into the positioning hole 186 provided on the first and second suspension arms 102 and 103, the Since the positioning with respect to the first and second suspension arms 102 and 103 is performed, the positioning of the pivot portion 183 with respect to the first and second suspension arms 102 and 103 can be performed accurately.

That is, in the conventional magnetic head device, when positioning the pivot portion with respect to the suspension arm, for example, the external shape of each component or a characteristic portion of the component is set as a reference point, and the reference point is set. The relative positioning between the pivot part and the suspension arm is performed based on this. Therefore, in the conventional magnetic head device, the dimensional accuracy of each component is directly reflected on the positioning accuracy between the pivot portion and the suspension arm, and errors such as dimensional accuracy are generated in the pivot portion and the suspension arm for each component. In some cases, the positioning of the two cannot be performed accurately.

However, in the magnetic head device 100 according to the present invention, the first and second suspensions 1
The first and second suspensions of the pivot portion 183 are fitted by fitting the positioning projections 185 provided on the pivot portion 183 into the positioning holes 186 provided in advance at substantially the center portions in the width direction of the pivot portions 02 and 103. Since the positioning with respect to the arms 102 and 103 is performed, the pivot portion 183 and the first and second suspension arms 102 and 103 are positioned.
Even if a slight error occurs in the outer dimensions of the pivot 103, regardless of the error in the outer dimensions,
First and second suspension arms 102, 103
Can be accurately positioned.

Also, the magnetic head device 100 according to the present invention
The positioning projection 18 provided on the pivot 183
5 with the first and second suspension arms 102, 10
3 only by fitting it into the positioning hole 186 provided in
The positioning of the pivot portion 183 with respect to the first and second suspension arms 102 and 103 can be easily performed.

In particular, when the tip of the positioning projection 185 provided on the pivot portion 183 is formed in a spherical shape, when the positioning projection 185 is fitted into the positioning hole 186, the initial state is not satisfied. Even when the center of the positioning projection 185 and the center of the positioning hole 186 are not exactly coincident with each other, the positioning projection 185 can be formed by positioning the peripheral surface of the spherically formed distal end with the positioning hole 186. The position of the positioning protrusion 185 is finally corrected in such a state that the center of the positioning protrusion 185 and the center of the positioning hole 186 exactly coincide with each other while making contact with the opening edge of the opening. Are fitted into the positioning holes 186. Therefore, in the magnetic head device 100, the positioning projection 18 provided on the pivot 183 is provided.
5 is formed in a spherical shape so that the pivot portion 1
83 first and second suspension arms 102,1
03 can be more accurately and easily positioned.

In the above description, the positioning holes 186 are provided in the first and second suspension arms 102 and 103.
The example in which the positioning projection 185 provided on the pivot portion 183 is fitted to the positioning hole 186 has been described. However, in order to fit the positioning projection 185, the first and second suspension arms 102 and 103 are fitted. It is not limited to the positioning hole 186 as described above, but any recess that does not penetrate in the thickness direction, or a first and a second recess can be used as long as the positioning projection 185 can be fitted. 2 suspension arms 102, 10
For example, a groove formed along the center in the width direction of 3 may be used.

Operation of Magnetic Head Device Next, the operation of the magnetic head device 100 having the above-described magnetic head unit 105 will be described. As described above, the magnetic head device 100 includes the first flexible disk 2 on which data is recorded at the first recording density, and the data recording at the second recording density higher than the first recording density. The recording and / or reproduction of data can be performed on both of the second flexible disks 22 to be performed.
The recording and / or reproduction of data is performed on the flexible disk 2 or the second flexible disk 22.

When the first flexible disk 2 is loaded on the disk table 64 of the disk rotation drive mechanism 61, the first and second head support arms 102,
Magnetic heads 105 and 10 attached to the distal end of
The first flexible disk 2 is driven to rotate while 5 is in contact with the signal recording section of the first flexible disk 2. At this time, the first disk 2 is about 300 rpm
The data is rotated at a rotation speed of m, and data is recorded and reproduced by the first head chip 131 of the magnetic head unit 105.

The first head chip 131 uses the magnetic field generated by the first coil 141 wound around the first bobbin 139 to control the third leg 151, the fourth leg 152, and the recording / reproducing head. A magnetic path is formed between the parts 153. The recording / reproducing head unit 153 performs data recording / reproducing on the first flexible disk 2 that is driven to rotate integrally with the disk table 64. In addition,
When data is recorded on the first flexible disk 2 using the first head chip 131, the fifth leg 153 is generated by a magnetic field generated from the second coil 142 wound around the second bobbin 140. Due to the magnetic field formed between the fourth leg 152 and the erasing head 154, only the vicinity of both sides in the track width direction of the recording track formed by the recording / reproducing head 153 is erased, and data is recorded. A guard band is formed between the recording tracks formed by the above operation.

On the other hand, when the second flexible disk 22 on which data is recorded at the second recording density is loaded on the disk table 64, the disk rotation driving mechanism 6
1, the second flexible disk 22 is about 3600
It is rotationally driven at a rotational speed of rpm. Thus, the second
When the flexible disk 22 is rotated at a high speed, the rail portions 149 and 15 formed on the head slider 133 are rotated.
A convection of air is generated between the zero and the second flexible disk 22, and a so-called air film is formed. Then, the first and second head support arms 102 and 103
The magnetic head parts 105, 105 attached to the tip side of
By the action of the air film, the second flexible disk 22 is floated from the main surface by a certain amount, for example, about 50 nm.

The magnetic head sections 105, 105 record data on the second flexible disk 22 by the second head chip 132 in a state of floating above the main surface of the second flexible disk 22 by a fixed amount. Perform playback.

Operation of Magnetic Disk Device Next, the operation of recording and reproducing data on the first flexible disk 2 or the second flexible disk 22 by the magnetic disk device 50 having the magnetic head device 100 will be described.

As shown in FIG. 29, the magnetic disk device 50 provided with the magnetic head device 100 has a DSP (digital signal processor) as a controller for controlling the entire device.
cessor) 201. By the DSP 201,
The rotation control of the first or second flexible disk 2 or 22 loaded on the disk table 64 and driven to rotate, the movement control of the magnetic head device 100, and the second flexible disk 22 for data recording at high recording density. Control of a recording / reproducing system is performed. The DSP 201 is connected to the bus 202. The DSP 201 is connected to the bus 202
And reads a program stored in the flash memory 203 connected thereto, and executes a control operation according to the program.

In the magnetic disk device 50, the flexible disk loaded on the disk table 64 is the first flexible disk 2 on which data is recorded at the first recording density, or the recording density is higher than the first recording density. A disk type detecting unit 204 for detecting whether or not the second flexible disk 22 records data at a high second recording density by using the disk identification holes 12 and 33 provided in the cartridge bodies 7 and 27. Have. The output signal of the disk type detection unit 204 is supplied to the DSP 201 as a mode signal SMD. DSP201
Controls switching of the rotation speed of the first or second flexible disk 2 or 22 loaded on the disk table 64 of the disk rotation drive mechanism 61 in accordance with the mode signal SMD.

The magnetic disk drive 50 has a motor drive circuit 206 for driving the spindle motor 62 of the disk rotation drive mechanism 61 for rotating the first or second flexible disk 2 or 22. A frequency signal SFG of a frequency corresponding to the rotation speed obtained from the spindle motor 62 is supplied to the DSP 201 via the motor drive circuit 206. The DSP 201 refers to the frequency signal SFG and refers to the first or second flexible disk 2 loaded on the disk table 64.
Motor driving circuit 2 so that the rotation speed of the motor 22 becomes a predetermined value.
06 is controlled.

The magnetic disk device 50 includes first and second head support arms 10 that support the magnetic head portions 105 and 155 of the magnetic head device 100, respectively.
A VCM (voice coil motor) 208 for moving the head carriage body 106 to which the first and second flexible disks 2 and 103 are connected in the radial direction of the first or second flexible disk 2 or 22 loaded on the disk table 64;
And a VCM driver 209 for driving the CM 208. The DSP 201 controls the magnetic head device 50 based on the tracking information of the magnetic head device 50 output from the R / W channel IC 313 to be described later so that the magnetic head device 50 is correctly positioned on the target track of the first or second flexible disk 2 or 22. The VCM driver 209 is controlled.

The magnetic disk device 50 has a recording / reproducing system for high recording density using the second flexible disk 22 and a recording / reproducing system for standard recording density using the first magnetic disk 2. . A recording / reproducing system for high recording density (upper mode) includes a disk controller 211 for exchanging data, status, and commands with the host computer, and a DRAM as a data buffer.
(Dynamic random access memory) 212 and R / W channel IC 21 for performing recording signal processing and reproduction signal processing
3 and the recording signal output from the R / W channel IC 213 is amplified and supplied to the second head chip 132 for high recording density (upper mode) provided on the head slider 133 of the magnetic head units 105 and 105. An amplifier unit 214 including a recording amplifier and a reproduction amplifier for amplifying a reproduction signal reproduced by the second head chip 132 and supplying the amplified signal to the R / W channel IC 213.

The disk controller 211 is connected to the bus 202
It is connected to the. Disk controller 211 and R
The operation of the / W channel IC 213 is
1 is controlled. Disk controller 211
Is a host computer (not shown) and EIDE (Extend
ed Intelligent Drive Electronics) interface.

The magnetic disk drive 50 according to the present invention
Has an FDD controller 215 as a standard recording density recording / reproducing system for recording / reproducing data on / from the first flexible disk 2 having the first recording density. The FDD controller 215 is connected to a host computer (not shown) via an FDD (Floppy Disk Drive) interface. This FDD controller 215
Generates a recording signal from MFM (Modified Frequency Modulation) data sent from the host computer at the time of data recording, and generates a magnetic head unit 105.
Recording / reproducing head section 15 of the first head chip 131
3 and a recording / reproducing head 15 during reproduction.
3 has a function of obtaining MFM data from the reproduced signal from the device 3 and supplying it to the host computer.

When the first disk cartridge 1 containing the first flexible disk 2 of the standard recording density is mounted on the magnetic disk device 50 configured as described above, the disk type detection unit 204 supplies the first disk cartridge 1 to the DSP 201. The mode signal SMD indicates the lower mode. Thus, based on the frequency signal SFG from the spindle motor 62 of the disk rotation drive mechanism 61, the DSP
The motor drive circuit 206 is controlled by the
Flexible disk 2 at a standard speed of, for example, 300 r
pm. Also, under the control of the DSP 201, the recording / reproducing system for the standard recording density as the first recording density is used.

Next, when data is recorded on the first flexible disk 2, the magnetic head units 105, 105
MFM data as write data is supplied from the host computer to the FDD controller 215 via the FDD interface in a state where the FDD contacts both main surfaces of the first flexible disk 2. Then, a recording signal corresponding to the MFM data is output from the FDD controller 215, and the recording signal is transmitted to the first head chip 131.
Is supplied to the recording / reproducing head unit 153, and is recorded in a predetermined sector of the target track of the first flexible disk 2.

On the other hand, when reproducing the data recorded on the first flexible disk 2, the data is reproduced by the recording / reproducing head unit 153 of the first head chip 131 from a predetermined sector of the target track of the first flexible disk 2. The supplied signal is supplied to the FDD controller 215, and the FDD controller 215 outputs the MF corresponding to the reproduced signal.
The M data is output and supplied to the host computer.

Next, a second disk cartridge 21 containing a second flexible disk 22 on which data is recorded at a second recording density higher than the first recording density is mounted on the disk device 50. And the mode signal SMD supplied from the disk type detection unit 204 to the DSP 201 indicates the upper mode. Thereby, based on the frequency signal SFG from the spindle motor 62,
The motor drive circuit 206 is controlled by the DSP 201, and the second flexible disk 22 loaded on the disk table 64 is moved at a high speed, for example, 3600.
It is rotationally driven at rpm. Further, the recording / reproducing system for high recording density (upper mode) is used under the control of the DSP 201.

Next, when data is recorded on the second flexible disk 22, the magnetic head units 105, 105
Is in a state where data can be recorded in a state in which both are close to both main surfaces of the second flexible disk 22, write data is supplied from the host computer to the disk controller 211 using the EIDE interface. The write data is temporarily stored in the DRAM 212. The data for writing is subjected to an error correction code adding process and an interleaving process by the disk controller 211 to generate the write data WD. Generated write data WD
Is the R / W channel I from the disk controller 211.
C213. And this R / W channel I
The recording signal S corresponding to the write data WD from C213
R is output, and the recording signal SR is supplied to the second head chip 132 provided on the head slider 133 of the magnetic head units 105 via the recording amplifier of the amplifier unit 214.
And is recorded in a predetermined sector of the target track of the second flexible disk 22.

On the other hand, when data recorded on the second flexible disk 22 is reproduced, the second flexible disk 22 has a second track from a predetermined sector on a target track.
The signal reproduced by the head chip 132 of the amplifier unit 21
R / W channel IC 213
Supplied to Then, this R / W channel IC 213
Performs a waveform equalization process, a data identification process, a 16/17 code decoding process, and the like to obtain read data RD.
This read data RD is transmitted to the disk controller 211.
And then subjected to deinterleave processing and error correction processing to obtain final read data. This read data is temporarily stored in the DRAM 212 and then supplied to the host computer.

As described above, when the first flexible disk 2 having the first recording density, which is the standard recording density, is mounted on the magnetic disk device 50, the first head of the magnetic head units 105, 105 is mounted. Data recording / reproduction is performed with the recording / reproduction head 153 of the chip 131 in contact with a signal recording section formed on the main surface of the first flexible disk 2. On the other hand, when the second flexible disk 22 of the second recording density, which is a high recording density, is mounted on the magnetic disk device 50, the magnetic head units 105, 1
Data recording / reproducing is performed in a state where the head slider 133 constituting the part 05 floats from both main surfaces of the second flexible disk 22 where the signal recording part is formed.

As described above, the magnetic disk drive 50 according to the present invention has a high recording density of the second flexible disk 2.
2 other than the first flexible disk 2 of the standard recording density
It is possible to record and reproduce data for
It has backward compatibility.

[0174]

As described above, in the magnetic head device according to the present invention, the projection provided on the pivot portion is fitted to the positioning portion formed substantially at the center in the width direction of the suspension arm. The pivot portion can be accurately and easily positioned at a substantially central portion in the width direction of the suspension arm. Further, in this magnetic head device, the pivot portion is positioned substantially at the center in the width direction of the suspension arm, so that the swing fulcrum of the magnetic head portion, that is, the point at which the gimbal spring is supported by the tip of the pivot is provided. This is consistent with the point at which the right and left weight balance of the magnetic head device is maintained. Therefore, in this magnetic head device, the magnetic head portion appropriately swings and displaces following the surface runout of the disk-shaped recording medium, and maintains a good posture with respect to the disk-shaped recording medium. And / or reproduction can be performed stably.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first disk cartridge accommodating a first magnetic disk of a first recording density.

FIG. 2 is a bottom view showing the lower surface side of the first disk cartridge.

FIG. 3 is a perspective view showing a second disk cartridge accommodating a second magnetic disk having a second recording density.

FIG. 4 is a bottom view showing the lower surface of the second disk cartridge.

FIG. 5 is a perspective view showing the appearance of a magnetic disk drive using the magnetic head device according to the present invention.

FIG. 6 is an exploded perspective view showing the magnetic disk device.

FIG. 7 is a perspective view showing a magnetic head device according to the present invention.

FIG. 8 is a plan view of the magnetic head device.

FIG. 9 is a bottom view of the magnetic head device.

FIG. 10 is a side view of the magnetic head device showing a state in which first and second head support arms to which a magnetic head is attached enter a disk cartridge to record and reproduce data.

FIG. 11 is a side view of the magnetic head device showing a state in which a second head support arm to which a magnetic head is attached is rotated in a direction away from the first head support arm to eject a disk cartridge.

FIG. 12 is an exploded perspective view showing a magnetic head unit included in the magnetic head device according to the present invention.

FIG. 13 is a plan view of the magnetic head unit.

FIG. 14 is a side view of the magnetic head unit.

FIG. 15 is a bottom view of the magnetic head unit.

FIG. 16 is a side view of the magnetic head unit.

FIG. 17 is a plan view showing a gimbal spring that swingably supports a magnetic head on a head support arm.

FIG. 18 is a plan view showing a spacer to which a gimbal spring incorporated in a magnetic head is attached.

19 is a sectional view taken along line X ₁ -X ₂ in FIG. 18.

20 is a sectional view taken along line X ₃ -X ₄ in FIG. 18.

FIG. 21 is a perspective view of the spacer as viewed from the bottom side.

FIG. 22 is a sectional view showing a magnetic head portion supported by a gimbal spring.

FIG. 23 is a plan view showing a magnetic head portion supported by a gimbal spring.

FIG. 24 is a sectional view showing a magnetic head portion supported by a gimbal spring.

FIG. 25 is a perspective view showing a magnetic head portion attached to the distal end side of the suspension arm with a part cut away.

FIG. 26 is a perspective view showing a state in which a spacer is attached to a suspension arm.

FIG. 27 is a side view showing a state in which a spacer is attached to a distal end side of a suspension arm, with a part cut away.

FIG. 28 is a cross-sectional view showing a state in which a spacer is attached to a distal end side of a suspension arm.

FIG. 29 is a block circuit diagram showing a recording / reproducing system of the magnetic disk device.

FIG. 30 is a schematic view showing a main part of a magnetic disk device provided with a conventional magnetic head device.

FIG. 31 is a side view schematically showing a tip side of a conventional magnetic head device.

[Explanation of symbols]

1 first disk cartridge, 2 first flexible disk, 21 second disk cartridge, 22
Second flexible disk, 50 magnetic disk device, 100 magnetic head device, 102, 103 suspension arm, 112 connecting plate, 113 head support spring, 105 magnetic head portion, 181 spacer, 183
Pivot, 184 Pivot, 185 Positioning protrusion, 186 Positioning hole

Claims (5)

[Claims] A magnetic head having a magnetic head element is attached to a tip of a suspension arm;
In a magnetic head device for writing and / or reading information to and from the information recording surface of the disk-shaped recording medium, with the magnetic gap of the magnetic head element facing the information recording surface of the disk-shaped recording medium to be rotated. A gimbal spring for swingably supporting the magnetic head portion; and a pivot portion having a tip abutting on a substantially central portion of the gimbal spring and supporting a substantially central portion of the gimbal spring, wherein the suspension arm of the pivot portion comprises The opposite base end is fitted with a positioning portion formed at a substantially central portion in the width direction of the suspension arm, and a protrusion for positioning the pivot portion at a substantially central portion in the width direction of the suspension arm. A magnetic head device comprising: 2. The magnetic head device according to claim 1, wherein the tip of the protrusion has a spherical shape. 3. A plurality of magnetic heads for writing and / or reading information from / to a disk-shaped recording medium at different recording densities corresponding to a plurality of disk-shaped recording media having different recording densities. The magnetic head device according to claim 1, further comprising a head element. 4. The first magnetic head element for writing and / or reading information from / to a first disk-shaped recording medium on which information is recorded at a first recording density. A second magnetic head element for writing and / or reading information to / from a second disk-shaped recording medium on which information is recorded at a second recording density higher than the first recording density. The magnetic head device according to claim 1, wherein: 5. When manufacturing a magnetic head device having a magnetic head unit attached to a distal end portion of the suspension arm via a gimbal spring whose substantially central portion is supported by a distal end portion of a pivot portion, A positioning portion is formed at a substantially central portion in the width direction, a projection is formed at a base end of the pivot portion facing the suspension arm, and a projection formed at a base end of the pivot portion is the suspension arm. A method of manufacturing a magnetic head device, comprising: positioning the pivot portion with respect to the suspension arm by fitting it into a positioning portion formed at a substantially central portion in the width direction of the magnetic head device.