JP2000195249A - Hard disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a hard disk device, having a base disposed with a disk and an actuator and a cover for covering this base lighter in weight, simpler in production process and lower in manufacturing cost. SOLUTION: A cover 23A of the hard disk device, having a base 22 disposed with a disk 24 rotated by a motor 25 and an actuator 26 for moving a head 29 relative to the disk 24, and the cover 23A for covering the base 22 is constituted by integrally molding a metal plate 33 and a resin part 36, with which the cover 23A is made light in weight, simpler in the production process and lower in manufacturing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk drive, and more particularly to a hard disk drive having a base on which a disk and an actuator are provided and a cover for covering the base. In recent years, demands for smaller and lighter portable personal computers have been increasing. Therefore, even in the hard disk device mounted on this kind of personal computer, further miniaturization,
It is necessary to reduce the weight.

[0002]

2. Description of the Related Art FIG. 1 shows a hard disk drive 1 as an example of the prior art. As shown in FIG. 1, the hard disk drive 1 is roughly composed of a base 2 and a cover 3. The base 2 is manufactured by performing machining, tapping, or the like for dimensioning a casting formed by aluminum casting. Tapping is base 2
This is performed to form a screw portion (tap portion) into which a fixing screw for fixing the device to an electronic device or the like is screwed.

A motor 5, an actuator 6 and the like are provided on an upper portion of the base 2, and a circuit board 10 is provided on a lower portion. The motor 5 is a direct drive motor, and has a function of rotating the disk 4 as a magnetic recording medium at a predetermined rotation speed. The actuator 6 includes a head arm 7 and a coil 8. At the tip of the head arm 7, a magnetic head 9 (hereinafter, simply referred to as a head) for performing a recording / reproducing process on the disk 4 is provided.

The coil section 8 constitutes a voice coil motor (VCM) together with a magnet (not shown).
When a signal bulb is applied to the coil section 8, the head arm section 7 rotates, and accordingly, the head 9 is moved to a predetermined position on the disk 4. The head arm 7 is formed of a metal material, and the coil 8 is formed of a resin material. The head arm 7 and the coil 8 are integrally formed. As described above, by forming the head arm portion 7 from a metal material, a shielding effect can be obtained, and therefore, it is possible to prevent noise from being mixed into a signal during recording and reproduction.

On the other hand, the cover 3 is formed by aluminum casting similarly to the base 2. The cover 3 is provided with a damping plate 14 for suppressing vibration generated in the hard disk drive 1, a motor fixing screw 11 for fixing the motor 5, and an actuator fixing screw 12 for fixing the actuator 6. Is arranged. In addition, a desiccant (not shown) is adhered using a double-sided tape to absorb moisture in the hard disk device 1.

Since the base 2 and the cover 3 need to be hermetically joined, a rubber packing 15 is provided at a position (lower edge) of the cover 3 in contact with the base 2. The rubber packing 15 was provided by bonding to the lower edge of the cover 3 using an adhesive.

[0007]

However, in the conventional hard disk drive 1, since the base 2 and the cover 3 are cast aluminum, there is a problem that the manufacturing process is complicated and the manufacturing cost is high. That is, when the base 2 and the cover 3 are manufactured by aluminum casting, the number of secondary processing steps increases. Specifically, when the base 2 and the cover 3 are manufactured by aluminum casting, after the casting, a deburring step, an annealing step, a drilling step, a cleaning step,
A coating process, a cutting process, a cleaning process, and a number of secondary processes are required. For this reason, the manufacturing process of the hard disk device 1 becomes complicated, and the manufacturing efficiency decreases and the product cost increases.

In terms of weight reduction, conventionally, the base 2 and the cover 3 are made of aluminum die-cast to reduce the weight as compared with the structure using an iron material. There is a limit to the weight reduction, and thus there is a problem that it is not possible to sufficiently respond to the recent demand for the weight reduction of the hard disk drive 1.
On the other hand, although the cover 3 formed of an aluminum plate is also provided in terms of weight reduction, in the case of the cover 3 consisting solely of an aluminum plate, the motor 5 rotates at 700 rpm.
At about 0 rotation, there are many problems in pursuing rigidity.

Further, the actuator 6 used conventionally has a problem in that the head arm 7 is made of metal such as aluminum, so that the weight is heavy, which hinders an increase in seek speed. Furthermore, since the packing 15 conventionally provided at the joint between the base 2 and the cover 3 is a rubber sheet, it is difficult to attach the packing 15. Furthermore, since the desiccant was adhered and fixed to the back surface of the cover 2 with the double-sided tape after the production, the fixing process was troublesome.

[0010] The present invention has been made in view of the above points, and has as its object to provide a hard disk drive capable of reducing the weight, simplifying the manufacturing process, and reducing the product cost.

[0011]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized by taking the following means. According to a first aspect of the present invention, there is provided a hard disk drive having a base provided with a disk rotated by a motor and an actuator for moving a head with respect to the disk, and a cover covering the base, wherein the cover is made of metal. A plate and a resin are integrally molded.

According to a second aspect of the present invention, in the hard disk drive according to the first aspect, the metal plate is used as a vibration damping plate. Also,
According to a third aspect of the present invention, in the hard disk drive according to the first or second aspect, a surface treatment is performed on a surface of the metal plate.

According to a fourth aspect of the present invention, in the hard disk drive according to any one of the first to third aspects, at least an interface between the metal plate and the resin of the cover is sealed with the interface. Characterized in that a cover seal to be applied is attached. According to a fifth aspect of the present invention, in the hard disk drive according to any one of the first to fourth aspects, a hole formed in a fixing portion of the motor and a hole formed in a fixing portion of the actuator are provided. A protection resin for protecting an end face of the metal plate is integrally formed around the portion with the metal plate.

According to a sixth aspect of the present invention, in the hard disk drive according to any one of the first to fifth aspects, a joining force enhancing portion is formed on the metal plate at a joining portion between the metal plate and the resin. It is characterized by having done. Further, the invention according to claim 7 is the invention according to claims 1 to 6.
In the hard disk drive described in any one of the above, a resin pocket for disposing a desiccant is provided inside the cover, and the resin pocket is formed integrally with the metal plate.

According to an eighth aspect of the present invention, in the hard disk drive according to any one of the first to seventh aspects, an elastomer is provided at a position of the cover facing the base and the elastomer is provided. Is formed by two-color molding or two-stage molding with the resin constituting the cover.

According to a ninth aspect of the present invention, in the hard disk drive according to any one of the first to eighth aspects, the base is formed of a resin. According to a tenth aspect of the present invention, in the hard disk drive according to the ninth aspect, the base is subjected to a conductive surface treatment.

According to an eleventh aspect of the present invention, in the hard disk drive according to the ninth or tenth aspect, a metal tap piece having a tap portion for fixing the base to a member to be fixed is provided. It is characterized by being formed integrally with the base. Further, according to a twelfth aspect of the present invention, in the hard disk drive according to any one of the first to eleventh aspects, the coil part and the head arm part constituting the actuator are integrally formed of resin and the head arm is formed. The portion is subjected to a conductive surface treatment.

The various stages described above operate as follows.
According to the first aspect of the present invention, since the cover is formed by integrally molding a metal plate and a resin, a metal plate is used in a portion of the cover that requires rigidity, and a metal plate is used in other portions that do not require rigidity. Can be made of resin, which can reduce the weight and cost of the cover and simplify the manufacturing process of the cover.

According to the second aspect of the present invention, since the metal plate is used as the damping plate, the damping plate functions as a part of the cover, thereby reducing the number of parts and simplifying the assembling work. Can be achieved. According to the third aspect of the present invention, by performing surface treatment on the surface of the metal plate, it is possible to prevent the metal plate from being oxidized and corroded.

Further, according to the fourth aspect of the present invention, since the cover seal is attached to at least the interface between the metal plate and the resin of the cover, the sealing property can be further improved. According to the invention of claim 5, a protective resin for protecting the end face of the metal plate is provided around the hole formed in the fixing portion of the motor and the hole formed in the fixing portion of the actuator. In addition, since the protective resin is integrally molded with the metal plate, the end surface of the metal plate, which is difficult to perform surface treatment, can be reliably protected, and oxidation and corrosion of the metal plate can be more reliably prevented. be able to.

According to the sixth aspect of the present invention, since the joining strength enhancing portion is formed on the metal plate at the joining portion between the metal plate and the resin, the joining force between the integrally formed metal plate and the resin is reduced. It can be hardened and reliability can be improved. According to the seventh aspect of the present invention, a resin pocket for disposing a desiccant is provided inside the cover,
By integrally forming the resin pocket on the metal plate, the manufacturing process of the cover can be simplified as compared with a configuration in which the resin pocket is separately formed.

According to the eighth aspect of the present invention, by disposing the elastomer at a position facing the base of the cover, the elastomer functions as a packing member for hermetically sealing the cover and the base. In addition, since the elastomer is formed by two-color molding or two-stage molding with the resin constituting the cover, the elastomer can be formed integrally with the cover, and the manufacturing process of the cover can be simplified.

According to the ninth aspect of the present invention, since the base is formed of resin, the weight can be further reduced, and the manufacturing process of the hard disk drive can be simplified. According to the tenth aspect of the present invention, since the base is subjected to the conductive surface treatment, a shielding effect can be obtained even when the base is made of resin, and the influence of disturbance during the operation of the hard disk device is eliminated. be able to.

According to the eleventh aspect of the present invention, the metal tap piece having the tap portion for fixing the base to the fixed member is formed integrally with the resin base, so that the metal tap is provided. The piece can be arranged at an arbitrary position on the base, and the tap piece is made of metal, so that it can be strongly fixed to the member to be fixed.

According to the twelfth aspect of the present invention, the coil portion and the head arm portion forming the actuator are integrally molded with resin, so that the weight of the actuator is reduced and the manufacturing process is simplified. Can be.
Further, since the head arm portion is subjected to the conductive surface treatment, the shielding property can be maintained even if the head arm portion is formed of resin.

[0026]

Next, embodiments of the present invention will be described with reference to the drawings. 2 to 7 show the first embodiment of the present invention.
FIG. 3 is a diagram for explaining a hard disk device 20A according to the embodiment. FIG. 2 is a cross-sectional view showing the overall configuration of the hard disk drive 20A, and FIGS. 3 to 7 are enlarged views showing the main parts of the hard disk drive 20A.

As shown in FIG.
0A is the base 22, cover 23, motor 2
5, and the actuator 26 and the like. In this embodiment, the base 22 is formed of a resin. As this resin material, for example, an epoxy-based hard resin can be used. By forming the base 22 from a resin, the base 22 can be formed collectively by using a resin molding method, and the base 22 can be formed with higher precision as compared with the casting method conventionally performed. is there.

Therefore, it is not necessary to perform the secondary processing required in the casting method which has been conventionally performed, so that the manufacturing process can be simplified. Further, the resin is lighter in weight than aluminum die cast, which is a conventional base material, so that the weight of the base 22 can be reduced. Therefore, the weight of the hard disk device 20A can be reduced by forming the base 22 from resin.

The base 22 formed as described above includes:
Conductive surface treatment is applied. In this embodiment, ion plating is used as a method for performing the conductive surface treatment. In addition, a conductive metal such as aluminum is used as an evaporation source for performing ion plating. As described above, by performing the conductive surface treatment on the base 22, a shielding effect can be obtained even when the base 22 is made of resin, and the influence of disturbance during the operation of the hard disk device 20A can be eliminated. In addition, by using ion plating for performing the conductive surface treatment, a conductive film with good adhesion and coverage and high quality can be formed.

When the hard disk device 20A is mounted on an electronic device (for example, a portable personal computer), the base 22 is fixed to a housing of the electronic device. Therefore, as shown in FIG. 7A, a tap piece 48 is provided at a predetermined position of the base 22. This tap piece 48 is a metal piece, and is shown in FIG.
As shown in the enlarged view, a tap portion 49 is formed at a predetermined position. The tap portion 49 is a portion to which a fixing screw used for fixing the base 22 to the housing of the electronic device is screwed.

The arrangement position of the tap piece 48 differs depending on the type and model number of the electronic device, and the arrangement position is designated by the user (a so-called user use component). Therefore, in a configuration in which the tap portion 49 is formed directly on the resin base 22, a mold is required for each type and model number of the electronic device, which is inefficient. Therefore,
In the present embodiment, the tap piece 48 is a metal piece,
The tap piece 48 is formed integrally with the base 22 by insert molding the tap piece 48 at the time of molding.

As described above, by forming the base 22 integrally with the tap piece 48, the metal tap piece 48 can be relatively easily arranged at an arbitrary position of the base 22 without changing the mold. It is possible to do. Further, since the tap portion 49 to which the fixing screw is screwed is formed on the tap piece 48 made of metal, even if the fixing screw is attached or detached, the screw thread does not collapse and the reliability can be improved. At the same time, it is possible to perform strong fixing to the housing of the electronic device.

The circuit board 30 is provided with various circuit elements necessary for performing the magnetic recording / reproducing process, and is fixed to the back of the base 22 using, for example, an adhesive. A motor 25, an actuator 26, and the like are disposed on the upper portion of the base 22 having the above-described configuration. The motor 25 is a direct drive motor, and has a function of rotating a disk 24 serving as a magnetic recording medium at a predetermined rotation speed.

The actuator 26 includes a head arm 27 and a coil 28. At the end of the head arm 27, a magnetic head 29 (hereinafter, simply referred to as a head) for performing recording and reproduction processing on the disk 24 is provided. Further, a coil 28A constituting a voice coil motor (VCM) is provided in the coil unit 28 together with a magnet (not shown). When a signal bulb is applied to the coil 28A, the head arm unit 27 rotates. Accordingly, the head 29 is moved to a predetermined position on the disk 24.

In this embodiment, the head arm 27 and the coil 28 constituting the actuator 26 are formed integrally with resin. As described above, by integrally molding the head arm 27 and the coil 28 with resin, the weight of the actuator 26 and the manufacturing process can be reduced as compared with the conventional configuration in which the head arm 7 is formed of metal. Simplification can be achieved.

By forming the head arm 27 from resin as described above, there is a problem in the shielding property, which is one of the functions of the head arm 27. Therefore, in the present embodiment, as shown in FIG. 4, a conductive surface treatment was applied to the head arm 27. In this conductive surface treatment, an ion plating capable of forming a high-quality conductive film having good adhesion and coverage was used in the same manner as described above (in FIG. 4, the area where the ion plating was performed was matted. Shown). Thus, the head arm 2
By applying a conductive surface treatment to 7, even if the head arm 27 is made of resin, the shielding property can be maintained as in the conventional case, and noise can be prevented from being mixed into the signal during recording and reproduction.

Next, the cover 23A will be described.
In this embodiment, the cover 23 </ b> A is
Are integrally molded (insert molding). The metal plate 33 has a planar shape as shown in FIG.
2 is formed with a fixing hole 38 through which a screw for fixing the fixing hole 38 is inserted. The surface of the metal plate 33 is subjected to a surface treatment to prevent the metal plate 33 from being oxidized and corroded.

The metal plate 33 mainly constitutes a top plate portion of the cover 23A which requires rigidity. The resin portion 36 mainly constitutes a side portion that does not require much rigidity. As described above, the strength of the cover 23A is improved by using the metal plate 33 mainly for the portion (top plate portion) of the cover 23A that requires rigidity and using the resin portion 36 for the other portion (side portion) that does not require rigidity. Cover 2 while maintaining
3A can be reduced in weight and cost, and the manufacturing process can be simplified.

Here, FIG. 3 is an enlarged view of a joint portion between the metal plate 33 and the resin portion 36. In the present embodiment, a joining strength enhancing portion for increasing the joining strength between the metal plate 33 and the resin portion 36 is formed at the joining portion between the metal plate 33 and the resin portion 36. FIG.
In the example shown in (A), a saw-toothed portion 45 is provided at an end portion of the metal plate 33 which is joined to the resin portion 36, thereby increasing the joining area between the metal plate 33 and the resin portion 36, thereby increasing the joining force. Is being planned. The same applies to the example shown in FIG.
By providing the uneven portion 46 at the end of the metal plate 33 that joins the resin portion 36, the joining area between the metal plate 33 and the resin portion 36 is increased, and the joining force is increased. Further, FIG.
In the example shown in (C), an adhesive 47 is applied to the end of the metal plate 33 that is to be joined to the resin portion 36, and the adhesive force of the adhesive 47 reduces the increase in the joining force between the metal plate 33 and the resin portion 36. I'm trying.

As described above, by forming the joining strength enhancing portion at the joining portion between the metal plate 33 and the resin portion 36, the joining force between the integrally formed metal plate 33 and the resin portion 36 can be hardened. The reliability of the cover 23A can be improved. Returning to FIG. 2, the description will be continued. The metal plate 33 having the above configuration is provided with a motor fixing screw 31 for fixing the upper position of the motor 25 and an actuator fixing screw 32 for fixing the upper position of the actuator 26. Further, a damping plate 34 </ b> A is provided above the metal plate 33. The vibration damping plate 34A is provided to suppress vibration generated in the hard disk device 20A due to rotation of the motor 25 or the like.

A cover seal 50 is provided on the top of the cover 23A. This cover seal 50
Are at least the metal plate 33 and the resin portion 36 of the cover 23A.
It is arranged so that outside air does not leak into the hard disk drive 20A from the interface with the hard disk drive 20A. In this embodiment, since the damping plate 34A is provided above the metal plate 33, the cover seal 5 including the upper portion of the damping plate 34A is provided.
0 is attached. By providing the cover seal 50 in this manner, the metal plate 33 and the resin
Leakage can be prevented from occurring at the interface with the hard disk drive 6, and the reliability of the hard disk drive 20A can be further improved.

Further, a drying agent 4 is provided inside the cover 23A.
There is provided a resin pocket 39 for disposing 0. As shown in an enlarged manner in FIG. 6, the resin pocket 39 includes a pocket portion 41 and a lid portion. The pocket 41 is formed integrally with the metal plate 33. Therefore, the manufacturing process of the cover 23 </ b> A can be simplified as compared with a configuration in which the pocket portion 41 (the resin pocket 39) is formed separately and fixed to the metal plate 33.

In order to mount the desiccant 40 in the pocket 39 made of resin, the desiccant 40 is first mounted in the pocket portion 41, and the pocket portion 41 is then closed with the lid portion 42. A plurality of bosses 43 are formed in the pocket portion 41, and small holes 44 corresponding to the positions where the bosses 43 are formed are formed in the lid portion 42. Therefore, the boss 43 has the small hole 44
The lid 42 is attached to the pocket 41 so that
Subsequently, the boss 43 protruding above the lid portion 42 is heat-sealed to fix the lid portion 42 to the pocket portion 41. By the above processing, the desiccant 40 is mounted in the resin pocket 39.

The cover 23A having the above structure is used for the base 2
2, the cover 23A is coupled to the base 22 by inserting a screw into the fixing hole 38 (see FIG. 5) and fixing it to the tap portion 49 (see FIG. 7). On this occasion,
The present embodiment is characterized in that the elastomer 35 is disposed at a position facing the base 22 of the cover 23A. This elastomer 35 is composed of the cover 23A and the base 22.
Function as a packing member for airtightness.

The elastomer 35 is formed simultaneously with the formation of the cover 23A. That is, when forming the cover 23A (resin portion 36), the elastomer 3
Reference numeral 5 denotes a configuration integrally formed on the cover 23A using two-color molding or two-stage molding. By using the two-color molding or the two-stage molding in this way, the elastomer 35 can be formed integrally with the cover 23A (the resin portion 36), and the manufacturing process of the cover 23A can be simplified.

FIG. 8 shows a hard disk drive 20B according to a second embodiment of the present invention. In FIG. 8,
The same components as those of the hard disk device 20A according to the first embodiment described above with reference to FIGS. 2 to 7 are denoted by the same reference numerals, and description thereof will be omitted. In the hard disk device 20A according to the first embodiment described above, an example is shown in which the metal plate 33 and the vibration damping plate 34A are configured as separate members. On the other hand, in the hard disk device 20B according to the present embodiment,
A metal plate is used as the vibration damping plate 34B.

That is, in this embodiment, the metal plate 33 used in the first embodiment is removed, and the function of the metal plate 33 is changed to the damping plate 34.
B is provided. Therefore, the damping plate 34B
Is formed integrally with the resin portion 36 (insert molding). With this configuration, the damping plate 34B functions as a part of the cover 23B, so that the number of components can be reduced and the assembling operation can be simplified.

FIG. 9 shows a hard disk drive 20C according to a third embodiment of the present invention. In FIG. 9, the same components as those of the hard disk device 20A according to the first embodiment described above with reference to FIGS. 2 to 7 are denoted by the same reference numerals, and description thereof will be omitted. In the hard disk drive 20A according to the first embodiment, the motor fixing screw 31 and the actuator fixing screw 32 are screwed to the motor 25 and the actuator 26 through the hole 54 formed in the metal plate 33. I was However, in this configuration, there is a problem that oxidation and corrosion easily occur in the metal plate 33 from the hole 54. That is, the surface treatment is performed on the metal plate 33 as described above, but the surface treatment material does not easily adhere to the inner edge of the hole 54, and the screws 31, 32
It is also conceivable that the surface treatment material peels off when is inserted.

Therefore, in the hard disk drive 20C according to the present embodiment, vibration damping is provided around the hole 54 formed in the upper fixed portion of the motor 25 and the hole 54 formed in the upper fixed portion of the actuator 26. A motor fixing portion 51 and an actuator fixing portion 52 are provided as protective resin for protecting an end surface of the plate 34B (the metal plate 33 in the configuration of the first embodiment).

The motor fixing portion 51 and the actuator fixing portion 52 are both formed of resin, and are formed together with the vibration damping plate 34B and the resin portion 36 when the cover 23C is manufactured. Thus, the motor fixing part 51 and the actuator fixing part 52 are
By being integrally formed with the (metal plate), the end face of the damping plate 34B (metal plate), which is difficult to perform surface treatment, can be reliably protected, and oxidation and corrosion occur in the damping plate 34B (metal plate). This can be prevented more reliably.

Further, as shown in the enlarged view of FIG. 9B, the motor fixing portion 51 and the actuator fixing portion 52 are formed with screw insertion portions 53, so that the fixing screws 31, 32 are fixed. There is no inconvenience in the processing.

[0052]

According to the present invention as described above, the following various effects can be realized. According to the first aspect of the invention, the weight and cost of the cover can be reduced, and the manufacturing process of the cover can be simplified. According to the second aspect of the present invention, the damping plate functions as a part of the cover, so that the number of parts can be reduced and the assembling work can be simplified.

According to the third aspect of the present invention, it is possible to prevent oxidation and corrosion from occurring on the metal plate. According to the fourth aspect of the invention, the sealing performance at the interface between the metal plate and the resin can be further improved. According to the fifth aspect of the present invention, it is possible to reliably protect the end face of the metal plate that is difficult to perform the surface treatment, and it is possible to more reliably prevent the metal plate from being oxidized and corroded.

According to the invention of claim 6, the joining force between the integrally formed metal plate and the resin can be strengthened, and the reliability can be improved. Claim 7
According to the described invention, the manufacturing process of the cover can be simplified as compared with the configuration in which the resin pocket is separately formed. According to the invention described in claim 8, the elastomer functions as a packing member for hermetically sealing the cover and the base, and the elastomer is formed by two-color molding or two-stage molding with the resin constituting the cover. Can be simplified.

According to the ninth aspect of the present invention, since the base is formed of resin, the weight can be further reduced, and the manufacturing process of the hard disk drive can be simplified. According to the tenth aspect, a shielding effect can be obtained even when the base is made of resin, and the influence of disturbance during operation of the hard disk drive can be eliminated.

According to the eleventh aspect of the present invention, the metal tap piece can be arranged at an arbitrary position on the base, and since the tap piece is made of metal, it is strongly fixed to the member to be fixed. be able to. Furthermore, according to the twelfth aspect of the present invention, the actuator can be reduced in weight and the manufacturing process can be simplified, and the head arm is provided with a conductive surface treatment so that the shielding property can be maintained. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a conventional hard disk drive.

FIG. 2 is a sectional view of the hard disk drive according to the first embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing a joint portion between a metal plate and a resin portion.

FIG. 4 is a diagram illustrating a configuration of an actuator.

FIG. 5 is an enlarged plan view showing a metal plate.

FIG. 6 is a perspective view for explaining a configuration of a desiccant pocket.

FIG. 7 is a diagram for explaining a configuration of a tap piece.

FIG. 8 is a sectional view of a hard disk drive according to a second embodiment of the present invention.

FIG. 9 is a sectional view of a hard disk drive according to a third embodiment of the present invention.

[Explanation of symbols]

 20A-20C Hard disk drive 22 Base 23A-23C Cover 24 Disk 25 Motor 26 Actuator 27 Head arm part 28 Coil part 31 Motor fixing screw 32 Actuator fixing screw 33 Metal plate 34A, 34B Damping plate 35 Elastomer 36 Resin part 39 Drying Agent pocket 40 Desiccant 45 Serrated portion 46 Uneven portion 47 Adhesive 48 Tap piece 50 Cover seal 51 Motor fixing portion 52 Actuator fixing portion

Continued on the front page (72) Inventor Masanori Ueda 4-1-1, Uedanaka, Nakahara-ku, Kawasaki-shi, Kanagawa F-term in Fujitsu Limited (Reference) 4E360 AA02 AB02 AB33 BD05 EA05 EA12 ED02 ED03 EE02 FA02 GA11 GA23 GA28 GA29 GA52 GB43 GC02 GC08

Claims (12)

[Claims] 1. A hard disk drive having a base provided with a disk rotated by a motor and an actuator for moving a head with respect to the disk, and a cover covering the base, wherein the cover is formed of a metal plate and a resin. A hard disk drive characterized by being integrally molded with the above. 2. The hard disk device according to claim 1, wherein the metal plate is used as a vibration damping plate. 3. The hard disk drive according to claim 1, wherein a surface treatment is performed on a surface of the metal plate. 4. The hard disk drive according to claim 1, wherein at least an interface between the metal plate and the resin is attached with a cover seal for sealing the interface. Characteristic hard disk device. 5. The hard disk drive according to claim 1, wherein a hole formed in a fixing portion of the motor and a hole formed in a fixing portion of the actuator are provided around the hole. A hard disk drive wherein a protective resin for protecting an end face of the metal plate is integrally formed with the metal plate. 6. The hard disk drive according to claim 1, wherein a bonding force enhancing portion is formed on the metal plate at a bonding portion between the metal plate and the resin. 7. The hard disk drive according to claim 1, wherein a resin pocket for disposing a desiccant is provided inside the cover, and the resin pocket is formed integrally with the metal plate. A hard disk device characterized by the above-mentioned. 8. The hard disk drive according to claim 1, wherein an elastomer is provided at a position of the cover facing the base, and the elastomer is formed of a resin and a resin forming the cover. A hard disk device formed by color molding or two-stage molding. 9. The hard disk drive according to claim 1, wherein the base is formed of a resin. 10. The hard disk drive according to claim 9, wherein a conductive surface treatment is applied to the base. 11. The hard disk drive according to claim 9, wherein a metal tap piece having a tap portion for fixing the base to the member to be fixed is formed integrally with the base. Hard disk device. 12. The hard disk drive according to claim 1, wherein a coil part and a head arm part forming the actuator are integrally formed of resin and a conductive surface treatment is applied to the head arm part. A hard disk drive characterized by having been subjected to the following.