JP2002279743A - Disk unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk unit using a head supporting mechanism of a L/UL system which has high impact resistance with a simple structure and enables high-speed access while reducing a load applied to a VCM as much as possible. SOLUTION: The disk unit is provided with a magnetic recording medium 12, a spindle motor 5, a support arm 2 to one end of which a slider 1 with a head mounted thereon is attached and which is provided so as to be turnable around a bearing 10 in a direction along the recording surface of the magnetic recording medium 12 and a direction perpendicular to the recording surface respectively, a leaf spring part 4 which applies energizing force to the support arm 2 in a direction approaching the magnetic recording medium 12, a voice coil motor for turning the support arm 2 in the radial direction of the magnetic recording medium 12, a ramp part 18, and a rotating body 16 provided at the other end side of the support arm 2 to reduce energizing force applied to the support arm 2 when the head is retracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk drive using a floating head such as a magnetic head, an optical head or a magneto-optical head, and more particularly to a disk drive having a load / unload type head support mechanism.

[0002]

2. Description of the Related Art A conventional disk drive will be described by taking a magnetic disk drive as an example.

With the rapid expansion of the portable electronic equipment (PDA, mobile phone, etc.) market and the miniaturization of the apparatus in recent years, the magnetic disk drive, which is one of the leading data storage methods, has become more portable. In other words, there has been a demand for miniaturization, thinning, and high impact resistance.

In order to satisfy the high impact resistance, various methods have been conventionally proposed as a head support mechanism of a magnetic disk drive.

For example, a load / unload method (hereinafter referred to as L
/ UL system) is one of the methods suitable for providing a magnetic disk drive satisfying high impact resistance.

In a conventional magnetic disk drive equipped with an L / UL head support mechanism, first, when the magnetic recording medium is rotating, the slider on which the magnetic head is mounted is supported by the support arm and The recording or reproduction is performed while floating at the predetermined position (load state).

Next, when the rotation of the magnetic recording medium is stopped, the support arm is moved between the coil provided on the support arm and the magnet and yoke formed above and below the support arm around the rotation axis. It rotates outside the magnetic recording medium by the interaction.

As a result, the guide formed at the tip of the support arm rides on the ramp having a tapered portion formed outside the magnetic recording medium. It is held apart from the medium (unloaded state).

In a magnetic disk drive equipped with such an L / UL head support device, when the magnetic recording medium is stopped, the magnetic head and the magnetic recording medium are held apart from each other. Even when an impact or the like occurs, the possibility that the magnetic head comes into contact with the magnetic recording medium and causes mechanical or magnetic damage to the magnetic recording medium can be reduced as compared with other methods.

[0010]

However, on the other hand, in the magnetic disk drive, as described above, it is necessary to further reduce the size and thickness, and at this time, a coil provided on the support arm and A voice coil motor (hereinafter referred to as VC) using the yoke and magnet provided above and below it.
M), the number of turns is reduced due to the restriction of the coil thickness, the magnetic flux linking to the coil is reduced due to the thinning of the magnetic circuit formed by the magnet and the yoke, and the leakage magnetic flux is increased. A reduction in torque is inevitable. Therefore, it is necessary to reduce the load applied to the VCM as much as possible.

In the magnetic disk drive using the L / UL head support device described above, the sliding load generated when the guide portion provided at the tip of the support arm rides on the tapered portion provided on the ramp portion. Occupies more than half of the torque required for the VCM, and the sliding load is further increased depending on the number of mounted heads. Therefore, various techniques aiming at reducing the sliding load have been conventionally proposed.

For example, the guide portion at the tip of the support arm
A technique has been proposed in which a ball bearing is built in a surface to be brought into contact with the tapered portion to reduce the coefficient of friction between the guide portion and the tapered portion (eg, Japanese Patent Laid-Open No. 7-3349).
No. 55).

However, in such a method, when the entire magnetic disk drive is downsized, it is very difficult to incorporate a bearing at the tip of the support arm, and there is a problem in productivity. In addition, mounting extra components on the tip of the support arm causes the resonance frequency of the support arm to decrease, and when the support arm is rotated at high speed, various vibration modes occur, and the settling of the vibration mode occurs. , It takes a long time, and it becomes difficult to perform high-speed access.

The present invention has been made in view of the above problems, and has a simple structure while minimizing the load on the VCM.
An object of the present invention is to provide a disk device using an L / UL type head support mechanism having high impact resistance and capable of high-speed access.

[0015]

According to the disk apparatus of the present invention, a recording medium, rotating means for rotating the recording medium, and a slider on which a head is mounted are mounted on a surface of one end which is to face the recording medium. A support arm provided rotatably in a direction along the recording surface of the recording medium and in a direction perpendicular to the recording surface with the portion as a rotation center, and a support arm in a direction approaching the recording medium. Elastic means for applying force, drive means for rotating the support arm in the radial direction of the recording medium, and the support arm for rotating the support arm in the radial direction of the recording medium to move the head from above the recording surface of the recording medium. It is characterized by comprising retreating means for retreating while maintaining the contact state, and pressing means for reducing the urging force applied to the support arm by the elastic means when retreating the head.

[0016] Thus, since the portion having the rigid body and the portion having the elasticity can be provided independently of each other, when an external impact is applied, the support arm portion can be formed of a highly rigid member. The biasing force of the elastic means on the slider can be set arbitrarily. Therefore, since the shock resistance is very high and the resonance frequency can be increased, it is possible to provide a disk device with high response characteristics and high-speed access.

Further, since the support arm is configured to be rotatable in the vertical direction and has a retracting means, when the recording medium is stopped, the head of the recording medium can be separated from the recording medium and held on the ramp portion. In addition, a disk device having excellent shock resistance can be provided.

Further, according to the disk device of the present invention,
When the support arm rotates in the radial direction of the recording medium, a rotating body (pressing means) with a small load comes into contact with the support arm, and the other end of the support arm is pressed down. Since the sliding load between the guide part and the ramp part can be reduced, the load on the VCM can be reduced as much as possible, and it has a simple structure, small size, thin shape, high impact resistance, and portability. It is possible to provide a disk device which is excellent in speed and can be accessed at high speed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a disk drive according to the present invention, a recording medium, a rotating means for rotating the recording medium, and a slider on which a head is mounted are mounted on a surface of one end which is to face the recording medium. As a rotation center, a support arm provided rotatably in a direction along the recording surface of the recording medium and in a direction perpendicular to the recording surface, and an urging force in a direction approaching the recording medium is applied to the support arm. Elastic means for imparting;
Driving means for rotating the support arm in the radial direction of the recording medium, and rotating the support arm in the radial direction of the recording medium to retract the head from the recording surface of the recording medium while maintaining a non-contact state Evacuation means and when retracting the head,
A pressing means for reducing the urging force applied by the elastic means to the support arm is provided.

Thus, since the portion having a rigid body and the portion having elasticity can be provided independently of each other, when an external impact is applied, the support arm portion can be formed of a highly rigid member. The biasing force of the elastic means on the slider can be set arbitrarily. Therefore, since the shock resistance is very high and the resonance frequency can be increased, it is possible to provide a disk device with high response characteristics and high-speed access.

Further, since the supporting arm is configured to be rotatable in the vertical direction and has a retracting means, when the recording medium is stopped, the head of the recording medium can be separated from the recording medium and held on the ramp portion. In addition, a disk device having excellent shock resistance can be provided.

Further, according to the disk device of the present invention,
When the other end of the support arm contacts the rotating body (pressing means) with a small load, the other end of the support arm is pressed down. Therefore, since the urging force applied to the support arm at the time of unloading is reduced, the contact surface pressure between the guide portion of the support arm and the ramp portion is reduced, and the sliding load can be reduced. Therefore, it is possible to provide a disk device having a simple structure, small size, thin shape, high impact resistance, excellent portability, and high-speed access while minimizing the load on the VCM. is there.

Further, if the pressing means is formed by a rotatably supported rotatable member which is disposed at the other end of the support arm and presses down the other end of the support arm when the head is retracted, a simple configuration can be obtained. The support arm can be moved up and down when loading or unloading the head without using separate power or the like.

Further, if the rotating body is formed so as to be held by the elastic body, it is possible to reduce the impact force between the rotating body and the head supporting device when loading or unloading the head. Reliability is also improved.

Further, if the rotating body is formed of a material having elasticity, the impact force between the rotating body and the head supporting device at the time of loading or unloading can be reduced with a simple configuration, and the operation can be reduced. Reliability is also improved.

Further, when the pressing means retracts the head,
If a pressing means or a material having elasticity is constituted so as to reduce a force substantially equal to the urging force applied to the supporting arm by the elastic means, the sliding of the ramp section and the guide section provided at the tip of the supporting arm is achieved. The load can be minimized.

Further, the driving means is operated by a voice coil provided on the support arm, so that a higher-speed rotation operation can be performed.

Further, since the retracting means is provided by a ramp provided in a predetermined area on the outer or inner peripheral portion of the recording medium, a disk device having more excellent impact resistance can be formed.

Further, a disk device having a head supporting device having a thin structure in a direction perpendicular to a recording medium can be easily provided by using a plate spring provided between a bearing portion and a support arm as the elastic means. Can be.

Further, by providing a gimbal mechanism on the support arm for freely supporting the slider in the roll direction and the pitch direction, an unnecessary inclination of the slider with respect to the recording medium and the pitch direction of the slider with respect to the recording medium at the time of recording / reproducing of the disk device is provided. Can be absorbed by the gimbal mechanism.

The bearing portion is provided with a pivot bearing having a pair of apex portions so as to be in contact with the support arm. The support arm is provided on the recording surface with a point where the apex of the pivot bearing abuts on the support arm as a fulcrum. By being provided to be rotatable in the vertical direction, the center of rotation can be accurately determined with a simple configuration, so that the positioning control of the head can be performed more accurately.

Further, a pair of apexes provided on the pivot bearing are connected to the support arm on a line perpendicular to the axial direction of the bearing portion and the longitudinal direction of the support arm and passing through the center of rotation of the bearing portion in the radial direction of the recording medium. By providing such a contact, it is possible to provide a disk device provided with a head support device that has a good weight balance in the longitudinal direction of the support arm and excellent impact resistance.

Further, since the tops of the pivot bearings are provided at positions symmetrical with respect to the longitudinal center line of the support arm, the weight balance in the width direction of the support arm is good, and the impact resistance is excellent. A disk device provided with a head support device can be provided.

Furthermore, the center of gravity of the portion held by the elastic means is located at the intersection of the center axis of rotation of the support arm in the radial direction of the recording medium and the center axis of rotation of the support arm in the direction perpendicular to the recording surface of the recording medium. If it is formed so as to be located, unnecessary vibration of the support arm can be minimized in the event of an external impact or the like.

As a result, it is possible to provide a disk device which is thinner than before, has excellent impact resistance, and can be accessed at high speed. Therefore, it is possible to provide a disk device which is small, thin, and excellent in portability. it can.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) As a first embodiment, the configuration of a magnetic disk drive according to the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the configuration of the magnetic disk drive of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. 1 and 2 show a supporting arm 2
Indicates a state held by the ramp section 18, that is, a state in which the magnetic head is unloaded.

First, the structure and operation of the magnetic disk drive and the head support device of the present invention will be described.

As shown in FIGS. 1 and 2, the magnetic disk drive 23 of the present invention includes a head support device 9 having a support arm 2 formed of an integral material.

The head support device of the magnetic disk drive according to the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. 3 is an exploded perspective view of a part of the head support device of the magnetic disk drive of the present invention.

In the head support device 9, the substantially annular leaf spring portion 4 and the semi-annular spring fixing member 28 are connected in a region on the left side of the paper of the rotation axis in FIG.
A leaf spring 4 is connected to the support arm 2 on the right side of the rotation shaft with respect to the paper surface. Support arm 2
Is a magnetic recording medium 1 operated by a voice coil motor.
2 is connected to a coil holder 8 to which the coil 3 is attached so as to be rotatable in the radial direction. These members, together with the pivot bearing 11 and the collar 26, form the bearing 10
And a nut 27.

With such a configuration, as shown in FIG. 2, the support arm 2 has a pair of tops 11a and 11b.
The support arm 2 is vertically rotated with respect to the magnetic recording medium 12 about the tops 11a and 11b of the pivot bearing 11 as fulcrums. It is configured to be possible.

The pair of apex portions 11a and 11b formed on the pivot bearing 11 move in the direction of the center axis of rotation when the support arm 2 rotates in the radial direction of the magnetic recording medium 12 and in the longitudinal direction of the support arm 2. The support arm 2 is provided so as to be in contact with the support arm 2 at a position symmetrical with respect to a center line of the support arm 2 on a line perpendicular to the rotation axis and passing through the rotation center axis.

The support arm 2 has a slider 1 provided with a magnetic head (not shown) on the surface facing the magnetic recording medium 12 mounted on the surface facing the magnetic recording medium 12 at one end.

Further, the coil 3 mounted on the coil holder 8 connected to the other end of the support arm 2 is mounted on the magnet 2 provided on the chassis 15 of the magnetic disk drive 23.
0, an upper yoke 19 (not shown in FIG. 1), and a lower yoke 21 together with a voice coil motor (hereinafter referred to as VCM) 24.
The support arm 2 is configured to be rotatable around the bearing 10 in the radial direction with respect to the magnetic recording medium 12 by the action of the VCM 24. The bearing 10 is rotatably mounted on the chassis 15 by mounting screws 7 formed via bearings.

The magnetic recording medium 12 is supported by a spindle motor 5 which is a rotating means. When the magnetic disk drive 23 performs recording or reproduction, that is, when the magnetic head is loaded, the magnetic recording medium 12 is rotated by the spindle motor 5. The magnetic head mounted on the slider 1 is driven by the relationship between the levitation force of the air flow generated by the rotation of the magnetic recording medium 12 and the urging force of the head support device 9 for urging the slider 1 toward the magnetic recording medium 12. In addition, recording or reproduction is performed by obtaining a fixed flying height with respect to the magnetic recording medium 12.

In this case, the magnetic recording medium 1 is
A predetermined load is applied in the direction of (2). This load is applied by the leaf spring portion 4 which is an elastic means provided on the head support device 9.

As shown in FIGS. 2 and 3, the slider 1 is supported by a gimbal mechanism 13 using a gimbal spring via a dimple 14 so that the slider 1 can be tilted in a roll and pitch direction. During recording and reproduction, the gimbal mechanism 13 can absorb the unnecessary inclination of the slider 1 with respect to the magnetic recording medium 12 in the roll and pitch directions.

The rotation and stop of the magnetic recording medium 12 and the rotation of the support arm 2 are all performed by the control means 25 shown in FIG.
Is controlled by

Here, each member will be described. First, in the present embodiment, the support arm 2 is integrally formed of metal, for example, stainless steel (SUS304). The support arm 2 can be formed by an etching method or a press working method.

By using such a support arm 2, the resonance frequency can be increased from about 2 kHz to 10 kHz.
Because it can be made very high frequency around Hz,
It is possible to obtain a magnetic disk drive in which the rotation speed of the head support device and the access speed thereof are higher than before.

The leaf spring portion 4 is formed of metal, for example, stainless steel (SUS304). This formation can be processed and formed by an etching method or a press processing method.

The coil holder 8 is made of metal, for example, A
1 or a resin material, such as PPS (polyphenyl sulfide) or LCP (liquid crystal polymer). In the case of Al, a die casting method or a press working method is used, and in the case of PPS or LCP, a known resin molding method can be used.

The upper yoke 19 and the lower yoke 21
It is made of a soft magnetic material such as ECC and can be processed and formed using a press working method.

As the magnet 20, a neodymium / iron / boron based rare earth magnet is used.

The connection between the members can be performed by a known method such as a spot welding method, an ultrasonic welding method, or a laser welding method.

In the present invention, the method of manufacturing each member or the method of connecting each member is not limited at all.

In the magnetic disk drive 23 of the present invention,
By configuring the head support device 9 in such a configuration,
The support arm 2 can be formed of a highly rigid material.

Therefore, the rigidity in the entire area from the pivot bearing 11 to the tops 11a and 11b of the pivot bearing 11 and the area of the support arm 2 supported by the pivot bearing 11 to the area where the slider 1 is formed is provided. The head supporting device 9 can be formed of a material having a high level.

Further, if the support arm 2 is formed of a highly rigid material, not only is the impact resistance against external impacts and the like improved, but also the resonance frequency of the support arm 2 can be increased. Since the vibration mode that caused the problem does not occur and the settling operation is not required, the rotation and positioning of the support arm 2 can be performed at high speed, and the access speed of the magnetic disk device 23 can be improved.

Further, since the leaf spring portion 4 which is an elastic means is not incorporated in the structure of the support arm 2 and is provided independently of the support arm 2, the thickness, material, etc. of the leaf spring portion 4 are provided. , The strength and the spring constant of the leaf spring portion 4 can be selected.

When the head support device 9 is used, the coil 3 and the coil holder 8 are mounted when the center of gravity of the portion held by the leaf spring portion 4 is rotated by, for example, the VCM 24. Position of the center of gravity of the support arm 2 in this state is the same as the intersection of the rotation axis of the support arm 2 in the radial direction of the magnetic recording medium 12 and the rotation axis of the support arm 2 in the direction perpendicular to the recording surface of the magnetic recording medium 12; In other words, by designing the head support device 9 so as to be substantially at the same position as the middle point (point P shown in FIG. 1) on the line connecting the points where the support arm 2 and each top of the pivot bearing 11 contact, It is possible to provide a stable head support device that has less vibration with respect to an external impact or the like. In this case, it is possible to provide a head support device having the highest impact resistance, but there is no practical problem with a slight displacement.

Next, the retracting means for unloading the magnetic head in the magnetic disk drive of the present invention and its operation will be described.

In FIG. 1 and FIG. 2, the magnetic recording medium 12
Is provided with a ramp portion 18 as a retracting means for holding the support arm 2. The lamp part is made of a resin having good slidability, for example, LCP (liquid crystal polymer), PP
S (polyphenyl sulfide) or the like is used. When the magnetic recording medium 12 stops rotating (during unloading), one end of the support arm 2 on which the slider 1 is provided rotates toward the outside of the magnetic recording medium 12 and the support arm 2 The guide portion 17 provided at the tip portion rides on the tapered portion 18a provided on the ramp portion 18 and is held by the holding portion 18b formed in a slightly concave shape.

As shown in FIG. 2, in the head supporting device 9 of the disk device 23 of the present invention, the coil 3
Is sandwiched between an upper yoke 19 and a magnet 20 from above and below. As shown in FIG.
The shaft 6 is located on the left side of the head
A cylindrical rotating body 16 is rotatably disposed as a pressing means through the shaft as shown in FIGS. 1 and 2. The shaft 6 is made of a metal having good slidability, for example, SUS420J.
For example, a resin having good slidability, such as LCP, can be used as the rotating body 16.

With this configuration, when the support arm 2 is unloaded, the rotating body 16 serving as the pressing means presses the coil holder 8 so that the support arm 2 rides on the tapered portion 18 a of the ramp portion 18. VCM24
Can be reduced.

A mechanism capable of reducing the load on the VCM 24 will be described in more detail with reference to FIG. FIG.
Is when the support arm 2 is loaded and unloaded.
The other end of the head supporting device 9 (the coil 3 and the coil holder 8)
Are shown), the upper yoke 19, the lower yoke 21, the rotating body 1
6 and a schematic diagram showing a positional relationship with a magnet 20.

As shown in FIG. 4, the rotating body 16 serving as a pressing means is rotatably driven by the shaft 6 having high rigidity.
5 (not shown), while the magnetic recording medium 12 is rotating, that is, while the magnetic head is loaded on the magnetic recording medium 12, as shown in FIG.
The head support device 9 rotates while being separated from the rotating body 16. In this case, the upper yoke 19 and the head support device 9
Is B.

When the magnetic recording medium 12 stops rotating,
That is, when the magnetic head is unloaded, the support arm 2 rotates in the radial direction of the magnetic recording medium 12, and one end of the support arm 2 on which the slider 1 is mounted is mounted on the magnetic recording medium 12 as described above. The other end side of the head supporting device 9 that rotates outward and includes the coil holder 8 illustrated in FIG.
The coil holder 3 is rotated leftward toward the paper surface, as shown in FIG. 4B, and the coil holder 3 contacts the rotating body 16.

FIG. 5 is a plan view showing the position of the head support device 9 of the magnetic disk drive 23 when the magnetic head is unloaded. As shown in FIG.
The guide portion 17 provided at one end of the
The coil holder 8 is configured to be pressed by the rotating body 16 at almost the same time when the coil holder 8 rides on the tapered portion 18 a of the coil 8.

When the rotation of the support arm 2 further proceeds, the coil holder 8 is provided with a taper as shown in a region C in FIG. 4, and as shown in FIG. 9 is pushed down by the rotating body 16 toward the magnet 20, and the distance B ′ between the upper yoke 19 and the coil holder 8 is:
It becomes larger than the distance B shown in FIG.

For this reason, a force in the direction away from the magnetic recording medium 12 acts on the tip of the support arm 2 where the guide 17 is formed. It is possible to ride on the tapered portion 18a.

With this configuration, the sliding load when the rotating body 16 is provided can be reduced as compared with the sliding load when the rotating body 16 is not provided in the conventional configuration.

This is because the shaft 6 and the rotating body 16 are substantially in linear contact with each other, the contact area is small, the shaft 6 is made of mirror-finished metal, and the rotating body 16 is made of a resin having good slidability. This is because the friction coefficient at the time of sliding can be made lower than the friction coefficient at the time of sliding between the tapered portion 18a and the guide portion 17.

As a result, the torque required for the VCM 24 can be reduced. Therefore, even when the entire magnetic disk drive 23 is reduced in size, the VCM 24 can be reduced in size while satisfying the required torque. Therefore, it is possible to make the entire magnetic disk device 23 small and thin.

In the present embodiment, the rotating body 1
6 shows the case where it is provided on the shaft 6 formed on the chassis 15, it goes without saying that the same effect can be obtained even if the shaft 6 is formed on the upper yoke 19.

(Second Embodiment) The configuration of a magnetic disk drive according to a second embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a view similar to FIG.
, Upper yoke 19, lower yoke 21, magnet 2
FIG. 6A is a diagram illustrating a positional relationship with the magnetic head, FIG. 6A is a state in which the magnetic head is unloaded, FIG. 6C is a state in which the magnetic head is unloaded, and FIG. FIG. 4 is a diagram showing a state where an end side is in contact with a rotating body 16.

In the magnetic disk drive of this embodiment, the first point is that the shaft 6 is formed on the upper yoke 19 via the holding member 22, and the holding member 22 is formed of an elastic material. This is different from the magnetic disk device described in the embodiment.

In FIGS. 6B and 6C, after the coil holder 8 provided on the other end of the head support device 9 comes into contact with the rotating body 16, a holding member made of an elastic material is used. 22 is deformed.

For the holding member 22, for example, a leaf spring formed of a metal such as stainless steel can be used.

With the magnetic disk device having such a configuration, the holding member 22 made of an elastic material for supporting the rotating body 16 is reduced to a spring load substantially equal to the load applied by the leaf spring portion 4 applied to the support arm 2. It is possible to design.

With this design, the sliding load between the ramp section 18 and the guide section 17 can be minimized, so that the load on the VCM 24 can be minimized, and the size and thickness of the magnetic disk drive can be reduced. The shaping can be performed most effectively.

Also, by adopting such a configuration,
It is possible to reduce the impact when the coil holder 8 contacts the rotating body 16. When the magnetic head is loaded from the unloaded state or unloaded from the loaded state, which has been a problem in the conventional head support device, the slider 1 mechanically or magnetically moves the magnetic recording medium 12. It is unlikely that problems that cause damage to the device will occur.

In the head support device shown in the present embodiment, the holding member 22 made of an elastic body does not necessarily need to be formed as a separate component, and the rotating body 16 is used to apply a spring load to the head support device 9. The holding member 22 may be formed of an elastic body that can be provided, for example, a synthetic rubber or a resin molding material having a predetermined hardness, and the holding member 22 may be formed of a highly rigid material. With this configuration, the same effect as described above can be easily obtained simply by forming the rotating body 16 itself with a member having elasticity.

In the present embodiment, the case where the shaft 6 is formed on the upper yoke 19 via the holding member 22 has been shown. However, as shown in FIG. Thus, even when formed on the chassis 15, the same effects as those of the configuration shown in the present embodiment can be obtained.

Further, in the first and second embodiments of the present invention, the rotating body 1 is used as the pressing means.
6, the pressing means does not necessarily need to be a rotating body. For example, only the shaft 6 is made of a material having good slidability, such as fluororesin or DLC (Diamond Like Carbodies).
n) A configuration in which a low friction coefficient is realized by performing surface treatment such as coating with a film.

With this configuration, it is not necessary to form the rotating body 16, so that the effects of the magnetic disk drive of the present invention can be obtained with a simpler configuration.

The first embodiment of the present invention and the second embodiment
In the embodiment, the case where the ramp portion 18 is provided outside the magnetic recording medium 12 has been described. However, even when the ramp portion is provided on the inner peripheral portion of the magnetic recording medium 12,
It is needless to say that the same effect can be obtained by forming the rotating body 16 as the pressing means of the present invention on the right side of the paper surface with respect to the head support device 9 shown in FIG.

In the embodiments of the present invention, a magnetic disk device using a magnetic head has been described. However, the disk device of the present invention is a non-contact type disk recording / reproducing device such as an optical disk device and a magneto-optical disk. The same effect is obtained when used as a device or the like.

[0092]

As described above, by using the head support device of the present invention, a head support having high flexibility, high shock resistance, and high-speed access can be provided while applying a sufficient load to the head. An apparatus can be provided.

Further, if the head support device of the present invention is used, the support arm can be moved up and down and a ramp is provided. When the rotation of the recording medium is stopped, the head is separated from the recording medium and held on the ramp. Becomes possible.

Further, if the magnetic disk drive of the present invention is formed, the sliding load between the guide portion of the support arm and the ramp portion when the head is unloaded can be reduced by the pressing means. It is possible to provide a disk device with a simple structure, small size, thin shape, high impact resistance, excellent portability, and high-speed access while minimizing the load as much as possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a disk device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of the disk device according to the first embodiment of the present invention;

FIG. 3 is an exploded perspective view showing a configuration of a head support device of the disk device according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing the operation of the disk device according to the first embodiment of the present invention.

FIG. 5 is a plan view showing the configuration of the disk device according to the first embodiment of the present invention.

FIG. 6 is a schematic diagram showing the operation of the disk device according to the second embodiment of the present invention.

FIG. 7 is a schematic view showing the operation of the disk device according to the second embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 1 slider 2 support arm 3 coil 4 leaf spring part 5 spindle motor 6 shaft 7 mounting screw 8 coil holder 9 head support device 10 bearing part 11 pivot bearing 11a, 11b top 12 magnetic recording medium 13 gimbal mechanism 14 dimple 15 chassis 16 rotating body REFERENCE SIGNS LIST 17 guide portion 18 ramp portion 18a taper portion 18b holding portion 19 upper yoke 20 magnet 21 lower yoke 22 holding member 23 magnetic disk device 24 voice coil motor 25 control means 26 collar 27 nut 28 spring fixing member

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Sakamoto 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D059 LA01 5D076 AA01 BB01 CC05 DD01 DD09 DD12 DD20 EE01 FF10 GG04

Claims (13)

[Claims] 1. A recording medium, a rotating means for rotating the recording medium, and a slider on which a head is mounted are attached to a surface of one end to be opposed to the recording medium, and a bearing portion is pivoted about
A support arm rotatably provided in a direction along the recording surface of the recording medium and in a direction perpendicular to the recording surface; and an elasticity for applying a biasing force to the support arm in a direction approaching the recording medium. Means for driving the support arm in the radial direction of the recording medium; and driving means for rotating the support arm in the radial direction of the recording medium to move the head from above the recording surface of the recording medium. A disk device comprising: a retracting unit that retracts while maintaining a non-contact state; and a pressing unit that reduces the urging force applied to the support arm by the elastic unit when retracting the head. . 2. The method according to claim 1, wherein the pressing means is a rotatably supported rotator disposed at the other end of the support arm and pressing the other end of the support arm when the head is retracted. The disk device according to claim 1, wherein 3. The disk device according to claim 2, wherein the rotating body is held by an elastic body. 4. The disk device according to claim 2, wherein the rotating body is made of a material having elasticity. 5. The apparatus according to claim 1, wherein said pressing means is configured to reduce a force substantially equal to a biasing force applied to said support arm by said elastic means when said head is retracted. The disk device according to claim 1. 6. The disk device according to claim 1, wherein said drive means is operated by a voice coil provided on said support arm. 7. The recording medium according to claim 1, wherein the retracting means is a ramp provided in a predetermined area of an outer peripheral portion or an inner peripheral portion of the recording medium.
Item 10. The disk device according to item 1. 8. The disk device according to claim 1, wherein said elastic means is a plate spring provided between said bearing portion and said support arm. . 9. The apparatus according to claim 1, wherein a gimbal mechanism for supporting the slider freely in a roll direction and a pitch direction is provided on the support arm. Disk device. 10. A pivot bearing having a pair of apex portions is provided on the bearing portion so as to be in contact with the support arm, and the support portion is provided with a point where the apex portion of the pivot bearing abuts on the support arm as a fulcrum. 10. The disk device according to claim 1, wherein the arm is provided so as to be rotatable in a direction perpendicular to a recording surface. 11. A pair of apex portions provided on the pivot bearing are perpendicular to an axial direction of the bearing portion and a longitudinal direction of the support arm, and pass through a center of rotation of the bearing portion in a radial direction of the recording medium. 11. The disk device according to claim 10, wherein the disk device is provided so as to contact the support arm on a line. 12. The disk device according to claim 10, wherein each top of the pivot bearing is provided at a position symmetrical with respect to a longitudinal center line of the support arm. 13. A center of gravity of a portion held by the elastic means, the center of rotation of the support arm in the radial direction of the recording medium and the center of rotation of the support arm in the direction perpendicular to the recording surface of the recording medium. The disk device according to any one of claims 1 to 12, wherein the disk device is located at an intersection of the following.