JP2000163944A - Magnetic disk drive - Google Patents

Abstract

[PROBLEMS] To reduce the influence of a rotational vibration of a magnetic disk device on a positioning mechanism without using a special mechanism on a frame side of a disk array system. SOLUTION: An HDA 3 is flexibly supported on a shell frame 2 by a suspension portion 4 including two links 14 and a support spring 19, and the center of rotation by the link 14 is a HDA 3.
The center of gravity 25 or the spindle position, the effect of rotational vibration can be reduced, and the housing vibration can be reduced. This makes it possible to provide a magnetic disk device that is robust against vibration of the entire device without providing a special mechanism on the frame side of the system.

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 recording and reproducing information on an information recording medium by holding a head on an information recording medium such as a magnetic disk or a magneto-optical disk.

[0002]

2. Description of the Related Art In general, a magnetic disk apparatus has a high recording density and a high transfer rate of recorded information by reducing a positioning error of a magnetic head (magnetic head) for writing and reading data on a track which is a recording unit in a disk radial direction. Although it has been improved, the residual vibration generated when the magnetic head moves from a so-called seek operation for moving the magnetic head from one track to another target track to a following operation (following) for the target track is caused by an increase in the positioning time. It is known that it becomes a hindrance factor for improving the data transfer speed. In the residual vibration, the entire magnetic disk device becomes a mass as a vibration source, and the vibration (housing vibration) generated by supporting this with a fixed frame or the like of the disk array system occupies a large proportion.

In a conventional magnetic disk drive, a magnetic head is mounted on the tip of an arm supported by a pivot bearing, and an oscillating actuator having a voice coil type motor provided on the opposite side to the pivot is formed. In general, a design is made such that the center of gravity of the swinging arm coincides with the pivot center. The reason for matching the center of the pivot with the center of gravity is that the vibration of the housing such that the magnetic disk device vibrates in a linear direction does not disturb the positioning of the head, but only the rotation around the axis perpendicular to the disk surface. Only the vibration of the housing in the rotation direction is a disturbance to the head positioning, and the influence of the housing vibration can be reduced. The housing rotation vibration described in this specification indicates such a rotation direction around an axis perpendicular to the disk surface. As a conventional technique for reducing the influence of the housing rotation vibration, for example, as described in Japanese Patent Application Laid-Open No. 6-12852, a fixing means for fixing a magnetic disk drive to a fixed frame of a disk array system is provided separately from the apparatus main body. Has been proposed.

[0004]

The means for fixing the magnetic disk drive to the frame according to the prior art requires a specially designed part for the frame in addition to the magnetic disk drive. There is a problem that the disk device itself must have a special shape.

On the other hand, at present, the most common main dimension of the magnetic disk drive is a 3.5-inch form factor.
(41.3 mm) x (101.6 mm) x (146 mm), and the position of the terminal for signal transmission with the disk array subsystem and the position of the mounting screws for the device are of a fixed type. It is known that the use of such a device makes it possible to provide compatibility with other models and is convenient in terms of system configuration.

Therefore, when the conventional means for fixing the magnetic disk drive to the frame of the magnetic disk drive is applied to the magnetic disk drive having the above-mentioned main dimensions, the size of the disk array subsystem must be changed. As the number of disk drives in the system increases, the volume required for that will become insignificant,
There was a problem that it could be a bottleneck in system design.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned disadvantages of the prior art, and to provide a magnetic disk drive having a mechanism for reducing the influence of housing rotation vibration while having a general magnetic disk drive external dimension. And thereby to provide a magnetic disk drive having high speed and high positioning accuracy.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a head disk assembly including a magnetic disk rotating around a spindle and a magnetic head for recording and reproducing data on the magnetic disk. A magnetic disk drive comprising an outer shell frame containing the head disk assembly, the outer shell frame rotating the head disk assembly along two sides of the head disk assembly along a plane parallel to the magnetic disk. The first and second link mechanisms and the buffer mechanism are configured so that the extension lines of the two link mechanisms intersect in the vicinity of the center of gravity of the head disk assembly and / or the center of rotation of the spindle. Features.

Further, according to the present invention, in the magnetic disk drive having the above characteristics, a terminal portion for inputting / outputting signals to / from the outside and a substrate on which a control circuit in the head disk assembly is mounted are provided on the outer shell frame. A second feature is that the head disk assembly is connected to the head disk assembly by a flexible cable, and the flexible cable has a rigidity having a buffering action against rotation of the head disk assembly supported by a link mechanism.

According to the present invention, in the magnetic disk drive of the first aspect, a terminal portion for inputting / outputting signals to / from the outside is provided on the outer shell frame, and a substrate on which a control circuit is mounted is provided on the head disk assembly. Connecting the head disk assembly and the terminal portion of the outer frame by a flexible cable, and that the flexible cable has a rigidity having a buffering action against rotation by the link mechanism support of the head disk assembly. This is the third feature.

Further, according to the present invention, in the magnetic disk drive having the above features, the outer shell frame has an outer side having a dimension of 4 mm.
A fourth feature is that 1.3 ± 1 mm, 01.6 ± 1 mm, and 146 ± 1 mm, and the diameter of the magnetic disk incorporated in the head disk assembly is less than 95 mm.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetic disk drive according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external view of a magnetic disk device according to the present embodiment, FIG. 2 is a detailed assembly view of an HDA suspension unit according to the present embodiment, and FIG. 3 is a diagram showing a suspension state of the present embodiment.

FIG. 1 is a diagram for explaining the overall appearance of the magnetic disk drive according to the present embodiment.
A head disk assembly (hereinafter referred to as HDA) including a magnetic disk, a spindle motor for rotating the magnetic disk, a magnetic head for recording and reproducing data on the magnetic disk, and an oscillating actuator for driving the magnetic head to rotate on the magnetic disk 3) and an outer shell frame 2 that supports the HDA 3 with a suspension portion 4. The outer shell frame 2 has a dimension conforming to a general 3.5-inch form factor, and has an outer dimension. About 41.3mm
× about 101.6 mm × about 146 mm, all of which are provided with mounting screw holes (not shown) and signal input / output terminals 5 with the disk array system, and are formed by bending and spot welding of stainless steel plates for heat dissipation. The center of each surface is punched to secure the air flow path.

This outer shell frame 2 has HD at two ends.
Only the side surface 6 to which the suspension portion 4 for supporting A3 is connected to both ends is a separate part.
A3 can be inserted inside and assembled. In FIG. 1, a part of the outer shell frame 2 is cut away to illustrate the suspension part 4, and details of the suspension part 4 will be described later.

Next, as shown in FIG. 7 showing the inside with the cover opened, the HDA 3 is a so-called 2.5-inch disk-sized magnetic disk 7 having a diameter of 65 mm, and an HDA base 10 is oscillated about a pivot shaft center 9. A positioning arm 8 fixed to the arm 8, a voice coil motor including a coil 11 and a permanent magnet 12 provided at one end of the arm 8, and a magnetic head provided at the other end of the positioning arm 8. The weight balance is adjusted so that the center of gravity of the positioning arm 8 including the center 11 coincides with the pivot axis center 9, so that the positioning arm 8 does not respond to the translational excitation acting on the HDA 3. The magnetic head, the magnetic disk and the positioning mechanism are sealed to prevent dust from entering. The HDA 3 of this embodiment is smaller than the conventional 3.5-inch form factor HDA.

Next, the suspension 4 for supporting the HDA 3 according to the present embodiment will be described. As shown in FIG. 2, the suspension unit 4 includes a frame fitting 16 screwed to the side surface 6 of the outer shell frame 2 and a pin 18 connected to one end of a link fixing portion 17 of the frame fitting 16. A link 14 movably attached, a pin 15 rotatably attached to the other end of the link 14 in the HDA cutout 13 of the HDA 3,
A support spring 19 is disposed between the metal fitting 16 and the HDA notch 13 so as to pass through the inside of the notch 20, and the HDA 3 is connected to one end of the outer shell frame 2 by a link 1.
4 so as to be rotatably supported. The support spring 19 is composed of a coil spring 21 and a columnar high viscoelastic rubber 22 disposed so as to penetrate the center of the coil spring 21, thereby restoring the HDA 3 when the HDA 3 rotates with respect to the outer shell frame 2. Acts as a damping element on the forces and the vibrations caused thereby. The resonance frequency of the HDA 3 in the rotational direction is determined from the axial rigidity of the coil spring 21 and the rubber 22 together with the moment of inertia of the HDA 3. If the frequency of the housing rotation vibration is adjusted to be about several tens Hz, the housing rotation vibration can be effectively reduced by using the disturbance suppression capability in the servo band of the positioning mechanism system. be able to.

The suspension 4 constructed as described above is connected to the link 1
4 is attached to the frame bracket 16 by the pin 18, and the other end of the link 14 is connected to the HDA through the pin 15.
The HDA 3 is supported by the outer shell frame 2 by attaching the frame fitting 16 to the notch 13 and screwing the frame fitting 16 to the side surface 6 of the outer shell frame 2 with the screw 23 and attaching the support spring 19.

As shown in FIG. 3, the suspension section 4 has an HDA
3 are arranged so as to support both ends in the longitudinal direction (upper side in FIG. 3), and the extension of the link 14 of both suspension portions 4 is HDA.
3 are arranged so as to intersect near the center of gravity 25.

The HDA 3 has another side in the longitudinal direction (FIG. 3).
A flexible printed circuit (FPC) 28 for transmitting a signal (including the power of the spindle motor or the voice coil motor for positioning) between the HDA 3 and the outer frame 2 is provided at one end of the FPC 2.
8 has an arc portion so that it does not become a resistance to the rotational movement of the HDA 3 and the rigidity in the housing rotation direction is reduced.

In this embodiment, the suspension 4 has the same structure, but the length and shape of the links 14 do not necessarily have to be the same. The reason will be described later. In this embodiment, the pins 14 or 1
The portion that is rotatably fixed at 8 is designed to reduce friction of the rotating portion of the link 14 by inserting a Teflon washer (not shown). Alternatively, it is desirable to reduce the friction of the rotating part as much as possible by using a bearing in this part.

The length of the suspension 4 and the angle of attachment of the suspension 4 are adjusted so that the extension lines 24a and 24b of the links 14 intersect at or near the center of gravity 25 of the HDA 3. ing. Therefore, although the shape and size of each link 14 need not be exactly the same,
Since the position of the center of gravity 25 of the DA can also be moved to some extent by designing the weight balance of the HDA 3, it is possible to use the same link 14 at the same distance from both the suspensions 4. This has the advantage of reducing component costs.

In the magnetic disk drive according to the present embodiment, the two links 14 form a four-node link mechanism by intersecting the extension lines 24a and 24b of the links 14 as described above, and the center of rotation is at the intersection point. Become. That is, the present mechanism makes the intersection of the extension lines 24a and 24b of the link 14 coincide with the center of gravity 25 of the HDA 3 so that the HDA 3
Always rotates only around its center of gravity to not only further enhance the resistance to linear excitation transmitted from outside to the device 1, but also to support the support spring 19 of the suspension 4 described above.
By adjusting the stiffness, the influence on the excitation in the rotation direction can be reduced.

The movement of the HDA 3 by the suspension unit 4 operates in the same manner regardless of the surface of the apparatus 1 down.
Care must be taken when using the following configuration. For example, an embodiment in which the link 14 itself is made of a rubber material or a combination of rubber and metal is also possible. Thus, the support spring 19 can be omitted.

In this case, when the apparatus 1 is to be installed so that both of the suspension portions 4 are on the upper side, that is, the direction in which the HDA 3 is hung with respect to gravity, the link 14 made of rubber expands. It is also conceivable that the intersection of the link center lines 24a and 24b does not coincide with the center of gravity 25 of the HDA 3. Therefore, in such a case, a roller 26 is provided on the side opposite to the side having the suspension portion 4 as shown by a broken line in FIG. 3, and the HDA 3 side is formed into an arc surface 27 centered on the HDA center of gravity 25. The corners are shaped and the rollers 26
Is preferably in contact with and supported by the arc surface 27 of the HDA 3. The support of HDA by the roller 26
3 rotates around the center of gravity 25 and does not hinder the link operation.

Therefore, the magnetic disk drive according to the present embodiment has the general external dimensions of the magnetic disk drive,
A mechanism for reducing the influence of the housing rotation vibration can be incorporated.

In the above embodiment, an example in which the link 14 is used as the suspension unit 4 has been described. However, the present invention is not limited to this, and the suspension unit may be formed by a leaf spring. This will be described with reference to FIG.

As shown in FIG. 8A, the suspension section 4 according to the present embodiment connects the outer shell frame 2 and the end of the HDA 3 by a metal plate 41 having two hinges 40 in the longitudinal direction. However, the link 14 of the above embodiment can be used instead, and as shown in FIG. 8B, the connection can be made by a single leaf spring 42 and the bending deformation of the leaf spring 42 can be used. In each of the suspension portions 4 according to these embodiments, the longitudinal center line 43 of the metal plate 41 or the leaf spring 42 intersects at the center of gravity 25 of the HDA 3 in the statically balanced state similarly to the link extension line 24 of FIG. With this arrangement, the rotation center of the HDA 3 becomes the intersection, and the same effect as in the above embodiment can be obtained. In particular, when a leaf spring 42 as shown in FIG. 8B is used, the supporting spring 19 can also be used by designing the bending rigidity of the leaf spring. In this case, it is conceivable to use two steel plates sandwiching a viscoelastic body as a material or to provide a member serving as a damper separately in order to have an effect of damping the housing rotational vibration. .

In the above-described embodiment, an example has been described in which the extension lines of the links 14 and the like intersect at the position of the center of gravity of the HDA. However, the present invention is not limited to this, and for example, the rotation of a spindle motor for driving a magnetic disk to rotate. The intersection may be formed at the center position, and this example will be described with reference to FIG.

FIG. 4 shows an HD according to another embodiment of the present invention.
It is a figure for explaining the suspension structure of A3, and this suspension structure is the extension lines 24a and 24 of each link 14 of the suspension part 4.
b at the center position 29 of the disk spindle motor.
The shape of each link 14 is designed so as to match.

In the magnetic disk drive according to the present embodiment, the influence of the vibration component on the housing vibration is reduced by matching the center position of the vibration component due to the eccentricity of the disk spindle motor with the intersection of the extension line of the suspension structure. can do. Furthermore, in the present embodiment, by appropriately designing the weight balance of the HDA 3, the center of gravity position 25 of the HDA 3 is made to coincide with the spindle center position (= link rotation center) 29, so that the influence of the disturbance vibration can be eliminated at the same time. Even when the positions cannot be completely matched, an effect can be expected if the distance between the center of gravity position 25 and the spindle center 29 is 20 mm or less. Also in this case, the suspension 4 shown in FIG.
May be used.

In the above embodiment, the suspension structure of the HDA 3 by the outer shell frame 2 has been described. However, it is conceivable that the suspended HDA is restrained from moving by a cable (FPC) or the like. Figure 5
This will be described with reference to FIGS.

FIG. 5 is a diagram for explaining an example in which an input / output terminal (connector) 5 for transmitting a signal from the magnetic disk device to the outside is attached to the outer shell frame 2. In this example, a control board 30 on which a control circuit is mounted is screwed to the outer frame 2, and the input / output terminals 5 are integrated with the control board 30 and provided on a part of the outer frame 2. The rectangular hole 31 is fitted. The connection between the HDA 3 and the control board 30 is performed by the FPC 28.

The FPC 28 has a band shape in which a number of signal lines are juxtaposed. For connection, a wide surface is installed in a direction parallel to the housing rotation axis of the HDA 3, and the FPC 28 is controlled with a vertical surface on the side surface of the HDA. An arc portion for connecting the substrate 30 to a horizontal surface is routed so as not to affect the rigidity of the HDA 3 in the rotation direction. That is, the arc portions are arranged along the rotation direction of the HDA 3 so that the arc portions of the FPC 28 do not hinder the rotation of the HDA.

In the magnetic disk drive according to the present embodiment, the control board 30 is fixed to the outer frame 2 and the arc portion of the FPC 28 connecting the HDA 3 and the control board 30 is formed by the HDA 3.
FPC is HD
Since the HDA 3 rotates around the center of gravity or the spindle position in the outer shell frame 2 without hindering the rotation of A, the HDA 3 always rotates only around the center of gravity or the spindle, and transmits in a linear direction transmitted from the outside. The resistance to excitation can be increased. In addition, H of FPC28
The DA side terminal 32 is joined to the terminal 33 shown in FIG. 7, and the substrate side terminal 34 is a hole 3 provided in a part of the outer shell frame 2.
5 to the terminal 36 on the control board 30.

Next, an embodiment in which the control board 30 is mounted on the HDA 3 will be described with reference to FIG. In the magnetic disk drive according to the present embodiment, a control board 30 on which a control circuit is mounted is screwed to the outer shell frame 2 and an input / output terminal (connector) 5 for transmitting a signal to the outer shell frame 2 to the outside is provided. The input / output terminal 5 and the control board 30 are fixed.
HDA terminal 39 is connected by FPC 37. The FPC 37 also has an arc-shaped bent portion (arc portion) in part, and is arranged so as not to hinder the rotational movement of the HDA 3.

In the magnetic disk drive according to this embodiment, the control board 30 is fixed to the HDA 3, the input / output terminals 5 are fixed to the outer frame 2, and the control board 30 fixed to the HDA 3 is fixed.
And the input / output terminal 5 of the outer shell frame 2 are connected so as not to hinder the rotation of the HDA 3, so that the FPC hinders the rotation of the HDA while the input / output terminal 5 for connection to the outside is fixed. Since the HDA 3 rotates around the center of gravity or the spindle position in the outer shell frame 2 without rotation, the HDA 3 always rotates only around the center of gravity or the spindle to increase the resistance to the linear excitation transmitted from the outside. be able to.

In the magnetic disk drive according to the embodiment shown in FIGS. 5 and 6, the radius of the arc-shaped portion of the FPC 28 or the FPC 37 depends on the distance between the outer frame 2 and the HDA 3 and the rotation of the HDA 3 of the FPC 28 or the FPC 37. It is determined from the rigidity around the center. The rigidity of the FPC around the rotation center is the same as that of the support spring 19 that suspends the HDA 3.
By setting the rigidity around the center of rotation to
The rigidity in the rotational direction of the FPC together with the support spring 19 can be set to twice or less as compared with the case where only the support spring 19 is used.
The resonance frequency of the housing rotation vibration of DA3 is about √2 = 1.4 times, and the housing rotation vibration can be suppressed.

Therefore, in the magnetic disk drive according to the embodiment, the HDA always rotates only around its center of gravity or around the spindle, and the resistance to the linear excitation transmitted from the outside can be increased. That is, according to the present embodiment, it is possible to reduce the influence of the housing rotational vibration on the positioning mechanism system, and to perform the positioning operation without residual vibration. Therefore, it is possible to ensure high speed and high positioning accuracy. It becomes possible.

In each of the above-described embodiments, an example has been described in which the disk size is 2.5 inches or 3 inches while having the external dimensions of the apparatus adapted to the 3.5-inch form factor. The invention is not limited to this. For example, if a 1.8-inch disk is used in a 2.5-inch form factor, the same configuration as described above can be obtained. It is needless to say that a product having the same external dimensions as a conventional product can be provided while being provided inside, and can be applied to all magnetic disk devices in which vibration of the entire device is a problem.

The present invention can also be represented as the following embodiments. <Embodiment 1> A first housing which suspends the device on a fixed portion, and a second housing which includes at least a disk spindle and a positioning mechanism system, are provided on two lines passing through the center of gravity of the second housing. A magnetic disk drive in which a second housing is supported inside the first housing by two link mechanisms, a spring, and a damper arranged along the first housing. <Second Embodiment> A first housing which suspends the device on a fixed portion, and a second housing which includes at least a disk spindle and a positioning mechanism system, are provided with an outer dimension of 41.3 ±. 1 mm and 101.6 ± 1 mm and 14
A second housing having a disk having a diameter of 6 ± 1 mm and a diameter of less than 95 mm and a positioning mechanism system is provided with two link mechanisms and a spring arranged along two lines passing through the center of gravity of the second housing. A magnetic disk drive in which a second housing is supported inside the first housing by a damper. <Third Embodiment> A first housing that suspends the device on a fixed portion, and a second housing that includes at least a disk spindle and a positioning mechanism system, are provided on two lines passing through the center of the spindle of the second housing. A magnetic disk drive in which the second housing is supported inside the first housing by two link mechanisms and a spring arranged along the first housing. <Embodiment 4> The above-described apparatus in which the center of gravity of the second housing coincides with the center of the spindle in the apparatus of Embodiment 3, or the distance between the two points is 20 mm or less. <Embodiment 5> A first housing that suspends the device on a fixed portion, a second housing that includes at least a disk spindle and a positioning mechanism system, and a link made of rubber or a link support portion are provided. The link mechanism is the second
A magnetic disk drive disposed along two lines passing through the center of gravity of the first housing, and the second housing is supported inside the first housing by the link. <Embodiment 6> A first housing that suspends the device on a fixed portion, and a second housing that includes at least a disk spindle and a positioning mechanism system, and whose longitudinal center line is the center of gravity of the second housing. At least two leaf springs and dampers arranged to coincide on two lines passing through
A magnetic disk drive in which a second housing is supported inside the first housing. <Embodiment 7> In the devices of Embodiments 1 to 6, a terminal unit for inputting and outputting signals to and from the outside of the device is provided in the first housing, and the input / output and control circuit of the device are mounted in the first housing. A substrate is provided, and the second housing and the substrate are connected by a signal line, and the rigidity of the signal line is equal to or less than the rigidity of the spring about the rotation center of the second housing. An apparatus characterized in that: <Eighth Embodiment> In the devices of the first to sixth embodiments, a terminal unit for inputting and outputting signals to and from the outside of the device is provided in the first housing, and the input / output and control circuit of the device are mounted in the second housing. A substrate is provided, a signal line is connected between the second housing and the terminal portion, and the stiffness of the signal line is equal to or less than the stiffness of the spring around the rotation center of the second housing. An apparatus, comprising:

[0041]

As described above, the present invention comprises a head disk assembly containing a magnetic disk and a magnetic head, and an outer shell frame containing the head disk assembly, wherein the outer shell frame comprises a head disk assembly. Are supported by two link mechanisms and a buffer mechanism that rotatably support two sides of the head disk assembly along a plane parallel to the magnetic disk, and the center lines of the two link mechanisms are at the center of gravity of the head disk assembly. With the crossing configuration, it is possible to provide a magnetic disk device that is robust against the vibration of the entire device without providing a special mechanism on the frame side of the system. An apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is an external view of a magnetic disk drive according to an embodiment of the present invention.

FIG. 2 is a detailed assembly diagram of the HDA suspension unit according to the embodiment.

FIG. 3 is a diagram showing an example of a suspended state of the HDA according to the embodiment.

FIG. 4 is a diagram showing another example of a suspended state of the HDA according to the embodiment.

FIG. 5 is a diagram showing a mounting state of a substrate according to an embodiment of the present invention.

FIG. 6 is a view showing a state of mounting a substrate according to another embodiment of the present invention.

FIG. 7 is a diagram showing a state inside the HDA of the embodiment shown in FIG. 6;

FIG. 8 is a view showing a suspension unit according to another embodiment of the present invention.

[Explanation of symbols]

1: magnetic disk device, 2: outer shell frame, 3: head disk assembly (HDA), 4: HDA suspension,
5: input / output terminal, 6: detachable side surface of outer shell frame, 7: magnetic disk, 8: positioning arm, 9: pivot axis center, 10: base, 11: coil, 12: permanent magnet, 13: HDA cut Missing part, 14: Link, 15:
Pin, 16: frame bracket, 17: link fixing part, 1
8: pin, 19: support spring, 20: link notch,
21: Spring, 22: Rubber, 23: Suspension fixing screw, 2
4: Link center line, 25: HDA center of gravity, 26: Roller, 27: HDA arc surface, 28: Flexible printed board (FPC), 29: Spindle center, 30: Control board, 31: Rectangular hole, 32: HDA of FPC Side terminal, 3
3: HDA terminal, 34: board side terminal, 35: hole, 36:
Terminal connection part, 37: FPC, 38: FPC terminal, 39:
HDA terminal, 40: hinge, 41: plate having hinge, 42: leaf spring, 43: center line in the longitudinal direction of the plate.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tomio Suzuki 2880 Kozu, Odawara-shi, Kanagawa Prefecture, Hitachi, Ltd.Storage Systems Division Within the Mechanical Research Laboratory (72) Inventor Shun Matsuki 2880 Kozu, Odawara-shi, Kanagawa Prefecture Storage Systems Division, Hitachi, Ltd.

Claims (4)

[Claims] 1. A magnetic device comprising: a head disk assembly containing a magnetic disk rotating about a spindle as a rotation center; a magnetic head for recording and reproducing data on the magnetic disk; and an outer shell frame containing the head disk assembly. A disk device, wherein the outer shell frame supports the head disk assembly by two link mechanisms and a buffer mechanism that rotatably support two sides of the head disk assembly along a plane parallel to the magnetic disk; A magnetic disk drive characterized in that the extension lines of the two link mechanisms intersect at the position of the center of gravity of the head disk assembly and / or near the rotation center position of the spindle. And a substrate on which a control circuit in the head disk assembly is mounted and a terminal unit for inputting / outputting signals from / to the outside are provided on the outer shell frame, and the substrate and the head disk assembly are made flexible. 2. The magnetic disk drive according to claim 1, wherein the magnetic disk drive is connected by a flexible cable, and the flexible cable has a rigidity having a buffering action against rotation by the link mechanism support of the head disk assembly. 3. A terminal unit for inputting / outputting signals to / from the outside is provided on the outer frame, a board on which a control circuit is mounted is provided on the head disk assembly, and the terminal unit of the head disk assembly and the outer frame is connected. 2. The magnetic disk drive according to claim 1, wherein the magnetic disk drive is connected by a flexible cable, and the flexible cable has a rigidity having a buffering action against rotation of the head disk assembly supported by a link mechanism. 4. The size of each side of the outer shape of the outer shell frame is 4
4. The magnetic device according to claim 1, wherein the magnetic disk has a diameter of 1.3 ± 1 mm, 01.6 ± 1 mm, and 146 ± 1 mm, and a diameter of a magnetic disk incorporated in the head disk assembly is less than 95 mm. Disk device.