JP2002008337A - Magnetic disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the reproducing output from a high-recording density disk-shaped recording medium. SOLUTION: A head slider 30 is arranged so that a magnetic head part 2 goes into a state to have the prescribed angle with respect to the main surface of the second disk-shaped recording medium and the element 34 goes into a state to approach the second disk-shaped recording medium more closely than the approached state of a first magnetic head element to the main surface of the second disk-shaped recording medium, when recording/reproducing is performed on the second high-recording density disk-shaped recording medium by a second magnetic head element 34 of a floating state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive for writing and / or reading signals to and from a magnetic disk.

[0002]

2. Description of the Related Art A magnetic disk drive for writing and / or reading signals (hereinafter, referred to as recording / reproducing) to / from a signal recording surface of a magnetic disk such as a flexible disk is a personal computer and an office computer. It is widely used in word processors and word processors, and its spread is remarkable. The magnetic disk drive performs recording and reproduction on the mounted magnetic disk.

In this magnetic disk drive, a magnetic head is mounted so as to be opposed to the tips of a pair of support arms, respectively. A magnetic disk is sandwiched between the pair of magnetic heads, and a signal of a flexible disk is provided. Recording and reproduction are performed on the recording surface.

[0004] In recent years, high-density recording of flexible disks has been promoted, and large-capacity flexible disks having a larger storage capacity than those practically used have been proposed.

[0005] This large-capacity flexible disk has the same external dimensions and the like as a conventional flexible disk (hereinafter, referred to as a first flexible disk), but its storage capacity has been dramatically increased. Specifically, the storage capacity of the first flexible disk is from 1 MB to 2 MB.
In contrast, the storage capacity of this large-capacity flexible disk (hereinafter, referred to as a second flexible disk) is set to several tens MB to several hundred MB.

As described above, when the recording density of the flexible disk is improved, the method of recording and reproducing on the flexible disk changes. Specifically, the first
Recording and reproduction are performed on the flexible disk while sliding the magnetic head element on the signal recording surface.
Then, for the second flexible disk, the second flexible disk
Recording and reproduction are performed while rotating the flexible disk at a high speed so that the magnetic head element slightly floats from the signal recording surface.

[0007] For this reason, different magnetic disk drive units are required to perform recording and reproduction at different recording densities on two types of flexible disks. However, using a plurality of types of magnetic disk drives in combination is cumbersome and expensive. Therefore, a magnetic disk drive capable of performing recording and reproduction at two types of recording densities, that is, one having backward compatibility has been proposed.

The magnetic disk drive having the backward compatibility has a lower mode magnetic head (hereinafter, referred to as a magnetic head) which performs recording and reproduction while sliding with respect to the first flexible disk.
Call it the lower head. ), And a magnetic head unit of an upper mode magnetic head (hereinafter, referred to as an upper head) for recording and reproducing while floating from the second flexible disk. That is, the magnetic head section is configured to have both a lower head and an upper head, and performs recording and reproduction in the upper mode or the lower mode by one of the magnetic heads.

More specifically, as shown in FIG. 28, a head slider 100 constituting this magnetic head portion has first and second rails 101 and 102 formed in a direction substantially parallel to the running direction of the flexible disk. Have been. The lower magnetic head element 103 attached to the head slider 100 so that the magnetic gap faces the outside from the medium facing surface of the first rail 101, and the second rail 10
And an upper magnetic head element 104 attached to the head slider 100 such that the magnetic gap faces the outside from the second medium facing surface.

In the magnetic head section, when the second flexible disk is mounted in the magnetic disk drive device, the magnetic head floats on the second flexible disk on which the head slider 100 is mounted with a predetermined flying height. The upper magnetic head element 104 performs recording and reproduction on the second flexible disk.

When the first flexible disk is mounted in the magnetic disk drive, the head slider 100 slides on the mounted first flexible disk while lowering the lower part. The recording / reproducing is performed on the first flexible disk by the magnetic head element 103.

[0012]

In the magnetic disk drive having the backward compatibility as described above, it is required to improve the reproduction output and improve the reproduction operation.

The present invention has been proposed in view of such a conventional situation, and it is an object of the present invention to provide a magnetic disk drive having a good output when reproducing from a flexible disk.

[0014]

As a method of increasing the reproduction output of the magnetic disk drive, the efficiency of the magnetic circuit system including the magnetic head element is increased, or the distance between the magnetic head element and the flexible disk is reduced. And reducing spacing loss.

As a result of diligent research from such a viewpoint, the inventors have found that when recording and reproduction are performed with the pair of magnetic heads floating on the second flexible disk, a pair of magnetic heads are used. At least one of
The second magnetic disk has a predetermined angle with respect to the main surface of the second flexible disk, and the second magnetic head element and the first magnetic head element with respect to the main surface of the second flexible disk. In comparison, the present inventors have found that the provision of being close to the second flexible disk improves the reproduction output of the magnetic disk drive.

In the magnetic head section, even when the position of the flexible disk is changed up and down in the recording / reproducing operation, the reproduction output of the pair of magnetic head sections must be substantially the same. In addition, it is necessary to prevent the flexible disk from being damaged. For this reason, the magnetic head is provided so as to be parallel to the main surface of the loaded flexible disk.

However, in recent years, since the sliding surface shape of the slider has been reviewed, the durability of the flexible disk against scratches has been improved. Also, since the assembling accuracy of the magnetic disk drive, the drive, and the flexible disk has been improved, the amount by which the position of the flexible disk changes up and down in the recording / reproducing operation is reduced, and the magnetic head is moved relative to the main surface of the flexible disk. You can now tilt.

In order to achieve the above object, a magnetic disk drive according to the present invention comprises a pair of head sliders each incorporating a pair of magnetic head elements, which are opposed to each other with a magnetic disk interposed therebetween. The magnetic recording medium floats from these head sliders with the rotation of the magnetic recording medium, and recording and / or reproduction is performed in a floating state. The pair of magnetic head elements incorporated in each of the head sliders includes a first magnetic head element that performs recording and / or reproduction on a first magnetic disk having a predetermined recording density and the first magnetic head element. A second magnetic head element for performing recording and / or reproduction on a second magnetic disk having a higher recording density than the disk. The flying attitude of at least one of the head sliders is inclined so that the second magnetic head element is closer to the magnetic disk than the first magnetic head element.

In the magnetic disk drive according to the present invention having the above-described configuration, when performing high-density recording / reproducing while the second magnetic head element is floating on the second flexible disk, The distance between the second magnetic head element and the second flexible disk is smaller than the distance between the first magnetic head element and the second flexible disk. As a result, the spacing loss during reproduction is reduced, and the output is good.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetic disk drive according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the magnetic disk drive 1 has a first magnetic head 2 supporting each of a pair of magnetic heads 2.
And second head support arms 3 and 4. And
A head carriage body 5 integral with the first and second head support arms 3 and 4; and a main guide shaft 6 supporting the head carriage body 5 together with a sub guide shaft (not shown).
And drive coils 9 and 10 supported by the coil support pieces 7 and 8.

As shown in FIG. 2, a flexible disk 1 is
The first rail 3 is provided on a surface facing the first rail 3 substantially parallel to the running direction of the flexible disk 11 as shown by an arrow A in FIG.
First and second rails 32 are formed.

The first rail 31 is provided with a magnetic gap facing the outside from a surface facing the flexible disk 11 (hereinafter referred to as a disk facing surface).
The second magnetic head element 33 is attached to the second rail 32 such that the magnetic gap faces the outside from the disk facing surface.

The first magnetic head element 33 performs recording / reproduction in a lower mode while being in contact with a flexible disk having a low recording density (hereinafter, referred to as a first flexible disk). Second magnetic head element 34
Is a flexible disk having a high recording density (hereinafter referred to as a second flexible disk).
Called a flexible disk. ), Recording / reproduction in the upper mode is performed in a floating state.

Magnetic disk drive 1 to which the present invention is applied
When performing recording / reproduction in the upper mode, at least one of the pair of head sliders 30 is such that the second magnetic head element 34 is on the second flexible disk 11 more than the first magnetic head element 33. The levitation attitude is inclined so as to approach.

As a result, the magnetic disk drive 1
Is that when recording / reproducing is performed on the second flexible disk, the distance between the second magnetic head element 34 and the second flexible disk is reduced, the spacing loss is reduced, and the reproduction output is improved. It will be.

Here, the inclination level of the magnetic head unit 2 supported by the first head support arm 3, that is, the magnetic head unit 2 provided on the spindle motor side is set to S _0, and the second head support the inclination level of the magnetic head 2 supported by the arm 4 when the product S _1, was examined the relationship between S ₀ and S _1.

The above-mentioned inclination level of the magnetic head unit 2 is, as shown in FIG. 3, a value obtained by using the second magnetic head element 34 as a reference when the magnetic head unit 2 is floating. The height h of the first rail 31 is shown by rank. Specifically, 0 when the height of the first head element 33 with respect to the second magnetic head element 34 is 10 nm or less, 40 when the height is 27.5 nm or more and 47.5 nm or less, It is set to 80 when it is 75 nm or more.

First, as shown in FIG. 4, a magnetic disk drive 1 having a magnetic head unit 2 in which S ₀ and S ₁ both become 0 is manufactured. Head Carriage Assembly)
When the reproduction output of the Hi-FD was measured in accordance with the height of each HCA, as shown in FIG. 5, the reproduction output of both the pair of magnetic heads 2 became almost constant.

Next, as shown in FIG. 6, a magnetic disk drive 1 having a magnetic head unit 2 in which S ₀ becomes 40 and S ₁ becomes 0 is manufactured. Change the height of the HCA and change the HCA
The reproduction output of Hi-FD was measured in accordance with the height of. As a result, as shown in FIG. 7, it was found that the reproduction output was improved in both the pair of magnetic head units 2 as compared with the case where both S ₀ and S ₁ were 0.

Next, as shown in FIG. 8, a magnetic disk drive 1 having a magnetic head unit 2 in which both S ₀ and S ₁ are 40 is manufactured. The height was changed, and the reproduction output of Hi-FD was measured according to the height of each HCA. As a result, as shown in FIG. 9, it was found that the reproduction output was improved in both the pair of magnetic head units 2 as compared with the case where both S ₀ and S ₁ were 0.

[0032] Next, as shown in FIG. 10, S ₀ 80
Then, a magnetic disk drive 1 having a magnetic head unit 2 in which S ₁ is 40 is manufactured, and the height of the HCA of the magnetic disk drive 1 is changed.
The reproduction output of Hi-FD was measured according to the height of CA.
As a result, as shown in FIG. 11, it was found that the reproduction output was improved in both the pair of magnetic head units 2 as compared with the case where S ₀ and S ₁ were both 0.

Next, as shown in FIG. 12, a magnetic disk drive 1 having a magnetic head unit 2 in which both S ₀ and S ₁ are 80 is manufactured.
, The height of the HCA was changed, and the reproduction output of the Hi-FD was measured according to the height of each HCA. As a result,
As shown in FIG. 13, it was found that the reproduction output was improved in both of the pair of magnetic heads as compared with the case where both S ₀ and S ₁ were 0.

[0034] Next, as shown in FIG. 14, S ₀ 80
Next, to prepare a magnetic disk drive apparatus 1 provided with a magnetic head portion 2 as S ₁ is a 0, different heights of the HCA for the magnetic disk drive apparatus 1, each of the HC
The reproduction output of Hi-FD was measured according to the height of A. As a result, as shown in FIG. 15, the reproduction output of the magnetic head unit 2 provided on the spindle motor side with respect to Hi-FD is improved as compared with the case where both S ₀ and S ₁ are 0. However, it was found that the reproduction output of the magnetic head unit 2 provided on the opposite side was reduced.

Next, as shown in FIG. 16, a magnetic disk drive 1 having a magnetic head portion 2 in which S ₀ becomes 0 and S ₁ becomes 40 is manufactured. Change the height of the HCA and change the HC
The reproduction output of Hi-FD was measured according to the height of A. As a result, as shown in FIG. 17, the reproduction output of the magnetic head unit 2 provided on the side opposite to the spindle motor with respect to Hi-FD is improved as compared with the case where S ₀ and S ₁ are both 0. However, it was found that the reproduction output of the magnetic head unit 2 provided on the spindle motor side was reduced.

Next, as shown in FIG. 18, a magnetic disk drive 1 having a magnetic head portion 2 in which S ₀ becomes 0 and S ₁ becomes 80 was manufactured. Then, the height of the HCA was changed for the magnetic disk drive 1, and the reproduction output of the Hi-FD was measured according to the height of each HCA. As a result, as shown in FIG. 19, the reproduction output of the magnetic head unit 2 provided on the side opposite to the spindle motor with respect to Hi-FD is improved as compared with the case where both S ₀ and S ₁ are 0. However, it was found that the reproduction output of the magnetic head unit 2 provided on the spindle motor side was reduced.

[0037] Finally, as shown in FIG. 20, S ₀ 40
Next, to prepare a magnetic disk drive apparatus 1 provided with a magnetic head portion 2 as S ₁ is a 80. Then, the height of the HCA was changed for the magnetic disk drive 1, and the reproduction output of the Hi-FD was measured according to the height of each HCA. As a result, as shown in FIG. 21, the reproduction output of the magnetic head unit 2 provided on the side opposite to the spindle motor with respect to Hi-FD is improved as compared with the case where both S ₀ and S ₁ are 0. However, it was found that the reproduction output of the magnetic head unit 2 provided on the spindle motor side was reduced.

From the above results, the relationship between S ₀ and S ₁ is:
It is desirable to satisfy the relationship of Expression 1 shown below.

0 ≦ S ₁ ≦ S ₀ Expression 1 When S ₀ <S ₁ , the output of the magnetic head unit 2 provided on the spindle motor side cannot be sufficiently obtained. This is because the magnetic head unit 2 provided on the side opposite to the flexible disk is inclined, and the magnetic head unit 2 does not apply a force to the flexible disk. It is considered that the spacing between the second magnetic head element 34 and the flexible disk is increased.

On the other hand, although the same tendency is observed when S ₁ ≦ S ₀ , the output of the magnetic head unit 2 provided on the side opposite to the spindle motor is small, and the output is provided on the spindle motor side. Not as much as the magnetic head 2.
This is considered to be because the flexible disk 11 is leveled with respect to the hub due to the centrifugal force, and a force is generated that attempts to hit the gap of the magnetic head unit 2 provided on the side opposite to the spindle motor.

When S ₁ = 0 and S ₀ = 80, the magnetic head 2 provided on the spindle motor side tilts, so that the magnetic head 2 adds to the flexible disk. Since the force is reduced, it is considered that the spacing between the second magnetic head element 34 and the flexible disk in the magnetic head unit 2 provided on the opposite side of the spindle motor increases, and the reproduction output sharply decreases.

It is desirable that S ₀ and S ₁ satisfy the relationship of the following equation (2). Here, W (mm) indicates the distance between the first rail 31 and the second rail 32.

0 ≦ S ₀ −S ₁ ≦ 75 × W / 1.5 Equation 2 Further, it is desirable that S ₀ satisfies the relationship of the following Equation 3.

27.5 × W / 1.5 ≦ S ₀ Equation 3 In this embodiment, as shown in FIG. 22, the distance between the center of the first rail 31 and the center of the second rail 32 is changed. Distance 1.5
mm.

By satisfying the above conditions, the magnetic disk drive 1 has good reproduction output.

As described above, when the magnetic head 2 is flying above the main surface of the second flexible disk during recording and reproduction, it has a predetermined angle with respect to the main surface of the second flexible disk. While being in a state,
In order to make the second magnetic head element 34 closer to the second flexible disk than the first magnetic head element 33, the following two methods can be considered.

The first method is to change the width w1 of the first rail 31 and the width w2 of the second rail 32, respectively. By making the width w1 of the first rail 31 smaller than the width w2 of the second rail 32, the head slider 30 is formed with the first rail 31 at the portion where the second rail 32 is formed. It is heavier than the part that is.

As a result, as shown in FIG. 23, in the magnetic head portion 2 supported by the first head support arm 3, the width w1 of the first rail 31 with respect to the width w2 of the second rail 32 ( When the ratio (w1 / w2) is changed, the height of the second rail 32 with respect to the first magnetic head element 33 increases when the magnetic head unit 2 is floating.

As shown in FIG. 24, when w1 / w2 is changed in the magnetic head 2 provided at the tip of the second head support arm 4, the magnetic head 2 floats. Sometimes, the height of the second rail 32 with respect to the first magnetic head element 33 is increased.

Then, as shown in FIG. 3, when the second magnetic head element 34 is floating on the main surface of the second flexible disk, a predetermined The second magnetic head element 34 is closer to the second flexible disk than the first magnetic head element 33 while having an angle.

Next, the connecting plate 40 constituting the first and second head arms 3 and 4 is attached to the above-described head carriage main body 5 by rotating the connecting plate 40 by a predetermined angle. In this method, at least one of the magnetic head units 2 is provided so as to have a predetermined angle with respect to the second flexible disk.

Thus, in the magnetic head 2 supported by the first and second head support arms 3 and 4, the magnetic head 2 provided at the tip of the first head support arm 3 floats. During this operation, the height of the second rail 32 with respect to the first magnetic head element 33 increases. Then, the second magnetic head element 34 comes closer to the second flexible disk than the first magnetic head element 33.

[0053] The magnetic head unit Next, the magnetic head unit 2 will be described in detail.

As described above, the head slider 30 constituting the magnetic head unit 2 has the flexible disk 11
First and second rails 31 and 32 substantially parallel to the traveling direction of
Are formed.

As shown in FIG. 2, the first and second rails 31 and 32 have front tapers 31a and 32a, respectively, on the approach end side of the flexible disk, and have the forward and backward ends of the flexible disk. Beside
Rear tapers 31b and 32b are formed respectively.
For example, the front tapers 31a, 32a are formed at an angle of about 0.5 ° with respect to the surface of the flexible disk, and the rear tapers 31b, 32b are formed at an angle of about 10 ° with the surface of the flexible disk 11. I have.

The first slider 31 is provided with the first magnetic head element 33 so that the magnetic gap faces the outside from the surface of the first rail 31 facing the flexible disk (hereinafter referred to as the medium facing surface). Installed.

The first magnetic head element 33 is a magnetic head element for performing recording and reproduction in the lower mode. Also, the first
The magnetic head element 33 is a so-called tunnel erase head, and is a recording / reproducing magnetic head (hereinafter, referred to as a read / write head 33a) disposed near the approximate center of the first rail 31 in the longitudinal direction. A magnetic head for erasing (hereinafter referred to as an erase head 33b) disposed downstream of the read / write head 33a in the traveling direction A of the flexible disk. The read / write head 33a has a magnetic gap G1 slightly larger than the track width of the recording track. The erase head 33b is located downstream of the magnetic gap G1 of the read / write head 33a, and has magnetic gaps G2 and G3 at portions located at both ends in the width direction of the magnetic gap G1.

The first magnetic head element 33 performs recording on the flexible disk by the magnetic gap G1 of the read / write head 33a. Then, the magnetic gaps G2 and G3 of the erase head 33b erase both ends of the written recording track in the width direction by a predetermined amount, thereby regulating the track width of the recording track formed on the flexible disk to a predetermined value. Is done.

The magnetic disk drive 1 uses the first magnetic head element 33 for a flexible disk having a low recording density (hereinafter, referred to as a first flexible disk) among two types of flexible disks. Recording and reproduction in the lower mode. At this time, the magnetic disk drive device 1 moves the first slider in a state where the head slider 30 slides on the signal recording surface of the first flexible disk.
The recording / reproduction with respect to the first flexible disk is performed by the magnetic head element 33.

The second slider 32 is a magnetic head element for performing recording and reproduction in the upper mode so that the magnetic gap faces the outside from the surface of the second rail 32 facing the flexible disk. Head element 34
Is attached.

As the second magnetic head element 34,
A magnetic head having a magnetic gap capable of forming a recording track narrower than the above-described read / write head 33a is mounted. For example, as this magnetic head, a so-called MIG head can be mentioned.

The magnetic disk drive 1 uses the second magnetic head element 34 to perform recording and reproduction on a flexible disk having a high recording density (hereinafter, referred to as a second flexible disk) in an upper mode. . At this time, the magnetic disk drive device 1 causes the second magnetic head element 34 to move the head slider 30 with respect to the second flexible disk with the head slider 30 floating on the signal recording surface of the second flexible disk by a predetermined floating amount. Recording and playback.

In the magnetic disk drive 1, the second magnetic head element 34 floats on the main surface of the second flexible disk in order to perform recording and reproduction on the second flexible disk as described above. 8, at least one of the pair of magnetic heads 2 is at a predetermined angle with respect to the main surface of the second flexible disk, and The magnetic head element 34 is closer to the second flexible disk than the first magnetic head element 33 is.

As a result, the magnetic disk drive 1
In the case of (2), the spacing between the second magnetic head element 34 and the second flexible disk is reduced, so that the spacing loss is reduced and the reproduction output is improved.

Magnetic Disk Drive Next, the entire magnetic disk drive 1 will be described in detail. As shown in FIGS. 1 and 25 to 27, the magnetic disk drive 1 is provided with first and second head support arms 3 and 4 that support each of the pair of magnetic head units 2. A head carriage main body 5 integrated with the first and second head support arms 3 and 4 is provided.
Is provided. The head carriage body 5 is moved in the radial direction of the flexible disk 11 loaded on a disk table (not shown).

The head carriage main body 5 is supported by a main guide shaft 6 provided on a base (not shown) and a sub guide shaft (not shown), and is provided so as to be parallel to the radial direction of the flexible disk 11. Have been.

A pair of coil support pieces 7 and 8 project from both sides on the base end side of the head carriage main body 5, and drive coils 9 and 10 are attached to these coil support pieces 7 and 8. I have. The driving coils 9 and 10 are inserted through a yoke of a voice coil motor (not shown) provided on the base via the coil support pieces 7 and 8. The head carriage main body 5 is moved in the radial direction of the flexible disk 11 by supplying a drive current to the drive coils 9 and 10.

The head support spring 41 constitutes the first and second head support arms 3 and 4, and is formed in a substantially triangular shape tapering toward the distal end as shown in FIGS. The magnetic head unit 2 is attached to the distal end side, and the base end side is fixed to the distal end side of the connecting plate 40 using a first fixing screw 42.

Further, at both ends in the width direction of the head support spring 41, return ribs 43 are formed so as to stand substantially perpendicularly to the main surface 41a of the head support spring 41. The folded rib 43 is formed such that both ends in the width direction of the leaf spring constituting the head support spring 41 are formed on the main surface 4 of the head support spring 41.
It is formed by being raised in a direction substantially perpendicular to 1a. The head support spring 41 has the folded ribs 43 formed at both ends in the width direction as described above,
The strength is improved.

The connecting plate 40 constituting the first head support arm 3 is integrally extended from one lower end side of the head carriage main body 5. That is, in the first head support arm 3, as shown in FIG. 25, the connecting plate 40 is extended toward the lower main surface of the flexible disk 11 while being fixed to the head carriage main body 5.

On the other hand, the second head support arm 4 has an arrow B in FIG. 27 in which the magnetic head 2 attached to the distal end side approaches and separates from the magnetic head 2 on the first head support arm 3 side.
It is supported by the head carriage main body 5 so as to be rotatable in the direction and the arrow C direction. That is, the second head support arm 4 is configured to connect a pair of support shafts (not shown) projecting from both sides on the base end side of the connection plate 40 to the head carriage main body 5.
27 is engaged with a shaft engaging groove formed on the upper end surface side of the shaft, and the arrow B in FIG.
It is attached so as to be rotatable in the direction and the arrow C direction.

The second head support arm 4 is rotated in the directions indicated by arrows B and C in FIG. 27 in conjunction with the raising / lowering operation of the cartridge holder with respect to the base in a disk drive (not shown). The second head support arm 4 locks a pair of locking pieces 45 protruding on both sides on the distal end side of the connecting plate 40 on both sides of a magnetic disk drive unit entrance opening formed in the cartridge holder. Arrow B in FIG. 27 in conjunction with the elevation of the cartridge holder
The rotation operation is performed in the direction and the arrow C direction.

Further, the second head support arm 4 is
5, the connecting plate 40 and the head carriage main body 5
Between the torsion coil springs 46 arranged between
The magnetic head 2 on the distal end side is urged to rotate in the direction of arrow B in FIG. 27 near the magnetic head 2 on the first head support arm 3 side.

The torsion coil spring 46 for urging the second head support arm 4 to rotate is provided as shown in FIG.
A second fixing screw 4 is provided on the upper end face side of the head carriage main body 5.
By being supported by the support plate 48 attached via the, the head carriage main body 5 is prevented from falling off.

When the cartridge holder is lifted from the base to the eject position where the disk cartridge can be inserted and removed, the second head support arm 4 moves about the support shaft as an arrow in FIG. It is rotated in the C direction.

When the disk cartridge is inserted into the cartridge holder and the cartridge holder is lowered to the base side, the second head support arm 4 receives the urging force of the torsion coil spring 46 and interlocks with the lowering of the cartridge holder. 27 around the support shaft in the direction of arrow B in FIG. Then, as shown in FIG. 27, the magnetic head unit 2 attached to the distal end side of the second head support arm 4 passes through a recording / reproducing opening opened in the disk cartridge held by the cartridge holder. And contacts the upper main surface of the flexible disk loaded on the disk table.

The cartridge holder descends to the base side,
When the disk cartridge held by the cartridge holder is mounted on the cartridge mounting portion formed on the base, the magnetic head unit 2 mounted on the distal end side of the first head support arm 3 as shown in FIG. At the same time, enters the disk cartridge held by the cartridge holder through the opened recording / reproducing opening, and contacts the lower main surface of the flexible disk loaded on the disk table.

On the back side of the magnetic disk drive 1, as shown in FIG. 26, located on the head carriage main body 5 to supply data to be recorded on the flexible disk 11 to the magnetic head unit 2, or A recording / reproducing IC circuit 49 for supplying data read from the flexible disk 11 by the magnetic head unit 2 to a signal processing circuit provided on an electronic circuit board (not shown) is provided.

The recording / reproducing IC circuit 49 includes, for example, an electronic component such as an IC chip mounted on a flexible wiring substrate 50 having flexibility, and is mounted on the head carriage body 5 on the back side of the magnetic disk drive 1. Is attached by an adhesive or the like. The recording / reproducing IC circuit 49 includes a connector (not shown), and is connected to the above-described signal processing circuit via the connector.

As shown in FIGS. 1 and 25 to 27, a head supporting spring is provided at the distal ends of the first and second head supporting arms 3 and 4 to which the pair of magnetic heads 2 are attached. A flexible wiring board 50 having flexibility is attached to the magnetic head portion 2 supported by the head support spring 41 from above.

The flexible wiring board 50 serves as a relay board between the recording / reproducing IC circuit 49 and the magnetic head unit 2, and is formed, for example, so as to have a substantially E-shape as a whole. And, as shown in FIG. 1 and FIGS. 25 to 27,
One part is located on the head support spring 41, and the other part is attached so as to be located on the magnetic head part 2.

The magnetic head unit 2 is configured such that one end of a wire constituting a coil is soldered to a terminal area of the flexible wiring board 50 so that the flexible wiring board 5 is formed.
0, connection wire 51, and recording / reproducing IC circuit 49,
It is connected to a signal processing circuit provided on an electronic circuit board.

As is clear from the above description, the magnetic disk drive 1 uses a pair of magnetic head elements 34 to perform recording and reproduction while floating on the second flexible disk with respect to the second flexible disk. At least one of the magnetic heads 2 is at a predetermined angle with respect to the main surface of the second flexible disk, and the second magnetic head element 34 is mounted on the second flexible disk. The state is closer to the main surface as compared to the first magnetic head element 33.
As a result, the distance between the second magnetic head element 34 and the second flexible disk is reduced, so that the spacing loss during reproduction is reduced, and the reproduction output is improved.

[0084]

As is apparent from the above description, the magnetic disk drive according to the present invention can be applied to a second disk-shaped recording medium having a high recording density with the second magnetic head floating. At the time of recording / reproducing, at least one of the pair of magnetic heads is set to have a predetermined angle with respect to the main surface of the second disk-shaped recording medium, and the second magnetic head element 2 with respect to the main surface of the second disk-shaped recording medium as compared with the first magnetic head element.
In a state of approaching the disk-shaped recording medium. Thus, when recording / reproducing on / from the second disk-shaped recording medium, the distance between the second magnetic head element and the second disk-shaped recording medium is reduced. For this reason, the spacing loss during reproduction is reduced, and the reproduction output is good.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a magnetic disk drive according to the present invention.

FIG. 2 is a perspective view showing a magnetic head unit provided in the magnetic disk drive according to the present invention.

FIG. 3 is a side view showing a state in which recording and reproduction are being performed on a flexible disk with the magnetic head part floating.

FIG. 4 is a side view showing a state where the inclination levels of both the magnetic head section on the spindle motor side and the magnetic head section on the opposite side are set to 0;

FIG. 5 is a diagram showing a reproduction output when the inclination levels of both the magnetic head section on the spindle motor side and the magnetic head section on the opposite side are set to 0.

FIG. 6 shows that the inclination level of the magnetic head on the spindle motor side is 40, and the inclination level of the magnetic head on the opposite side is 0.
It is a side view showing the state.

FIG. 7 shows that the inclination level of the magnetic head on the spindle motor side is 40, and the inclination level of the magnetic head on the opposite side is 0.
FIG. 9 is a diagram showing a reproduction output when “1” is set.

FIG. 8 is a side view showing a state where the inclination levels of both the spindle motor side and the magnetic head on the opposite side are set to 40.

FIG. 9 is a diagram showing a reproduction output when the inclination levels of both the spindle motor side and the magnetic head on the opposite side are set to 40.

FIG. 10 is a side view illustrating a state in which the inclination level of the magnetic head unit on the spindle motor side is 80 and the inclination level of the magnetic head unit on the opposite side is 40.

FIG. 11 is a diagram showing a reproduction output when the inclination level of the magnetic head unit on the spindle motor side is 80 and the inclination level of the magnetic head unit on the opposite side is 40.

FIG. 12 is a side view showing a state where the inclination levels of both the spindle motor side and the magnetic head on the opposite side are set to 80;

FIG. 13 is a diagram illustrating a reproduction output when the inclination levels of both the spindle motor side and the magnetic head unit on the opposite side are set to 80.

FIG. 14 is a side view showing a state where the inclination level of the magnetic head unit on the spindle motor side is set to 80 and the inclination level of the magnetic head unit on the opposite side is set to 0.

FIG. 15 is a diagram showing a reproduction output when the inclination level of the magnetic head unit on the spindle motor side is set to 80 and the inclination level of the magnetic head unit on the opposite side is set to 0.

FIG. 16 shows that the inclination level of the magnetic head on the spindle motor side is 0, and the inclination level of the magnetic head on the opposite side is 4
It is a side view showing the state set to 0.

FIG. 17 shows that the inclination level of the magnetic head on the spindle motor side is 0, and the inclination level of the magnetic head on the opposite side is 4
FIG. 9 is a diagram showing a reproduction output when the value is set to 0.

FIG. 18 shows that the inclination level of the magnetic head on the spindle motor side is 0, and the inclination level of the magnetic head on the opposite side is 8
It is a side view showing the state set to 0.

FIG. 19 shows that the inclination level of the magnetic head on the spindle motor side is 0, and the inclination level of the magnetic head on the opposite side is 8
FIG. 9 is a diagram showing a reproduction output when the value is set to 0.

FIG. 20 is a side view showing a state where the inclination level of the magnetic head unit on the spindle motor side is 40 and the inclination level of the magnetic head unit on the opposite side is 80.

FIG. 21 is a diagram showing reproduction output when the inclination level of the magnetic head unit on the spindle motor side is 40 and the inclination level of the magnetic head unit on the opposite side is 80.

FIG. 22 is a side view showing a center-to-center distance between two rails formed in the magnetic head unit.

FIG. 23 is a diagram illustrating a relationship between a ratio of two rail widths formed on a magnetic head unit provided on a spindle motor side and a height of a first rail with respect to a second magnetic head element. .

FIG. 24 is a diagram showing the relationship between the ratio of the width of two rails formed on the magnetic head portion provided on the opposite side of the spindle motor and the height of the first rail with respect to the second magnetic head element. It is.

FIG. 25 is a plan view of a magnetic disk drive to which the present invention is applied.

FIG. 26 is a bottom view of the magnetic disk drive.

FIG. 27 is a side view of the magnetic disk drive.

FIG. 28 is a perspective view showing a magnetic head unit in a conventional magnetic disk drive.

[Explanation of symbols]

Reference Signs List 30 head slider, 31 first rail, 32 second rail, 34 second magnetic head element

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D042 AA07 BA08 CA02 DA02 NA03 PA02 QA02 TA02 5D059 AA01 BA02 CA14 CA25 CA26 DA15 EA02 EA12

Claims (5)

[Claims] 1. A pair of head sliders, each incorporating a pair of magnetic head elements, are opposed to each other across a magnetic disk, and float from the head sliders with the rotation of the disk-shaped magnetic recording medium. Recording and / or reproduction are performed in a state, and a pair of magnetic head elements incorporated in each of the head sliders is used to record and / or reproduce data on and from a first magnetic disk having a predetermined recording density. A head element and a second element having a higher recording density than the first magnetic disk.
Of recording and / or reproducing to and from a magnetic disk
At least one of the head sliders has a flying attitude inclined such that the second magnetic head element is closer to the magnetic disk than the first magnetic head element. Disk drive. A difference between a distance of the first magnetic head element from the magnetic disk surface and a distance of the second magnetic head element from the magnetic disk surface is defined as an inclination level of a head slider, Where S ₀ (nm), S ₁ (nm) the inclination level of the other head slider, and W (mm) the distance between the magnetic head elements in each head slider, 0 ≦ S ₁ ≦ S _{0 0 × W / 1.5 ≦ S} 0 -S 1 ≦ 75 × magnetic disk drive according to claim 1, characterized in that the W / 1.5. 3. A head slider inclination level is S _0, the magnetic disk drive according to claim 2, characterized in that it is arranged on the spindle motor side for rotatably driving the magnetic disk. Wherein said pair of head slider is opposed to the upper and lower sides of the magnetic disk, according to claim 3 in which the inclined level, characterized in that the head slider is S ₀ being placed below the magnetic disk A magnetic disk drive according to any one of the preceding claims. 5. The magnetic disk drive according to claim 2, wherein an inclination level S ₀ of said one head slider is not less than 27.5 × W / 1.5 (nm).