KR0153883B1 - Hard disk device - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a slim type hard disk drive device.

2. The technical problem to be solved by the invention

The present invention provides an essential drive device and mounting structure of a hard disk drive that can minimize mounting space (drive thickness) while improving operating performance for slimming.

3. Summary of the Solution of the Invention

The present invention is a conventional hard disk drive, the base of the drive (Multi-Layer) is composed of a PCB (Layer), the various circuits and electrical components for the rotation support of the disk on the PCB A pivot shaft for supporting rotation of the spin shaft and the actuator is formed, and a pattern coil for generating a magnetic field around the spin shaft and the pivot shaft is formed. In addition, the pattern is formed by attaching a permanent magnet that generates a magnetic field on the inner concentric circle of the disk to face the pattern coil around the spin shaft so that the disk can rotate on the spin axis without using an independent spindle motor. The rotational force is generated by mutual magnetic field action between the coil and the permanent magnet so that the disk can rotate by the rotational force. At this time, in order to block the magnetic field from the permanent magnet attached to the disk and to minimize the mold to the head, a magnetic shielding material is attached around the pattern coil facing the permanent magnet. In addition, a permanent magnet, which generates a magnetic field, is attached to the rear of the actuator to face the pattern coil around the pivot shaft so that the actuator can rotate on the pivot axis so as to generate rotational force by mutual magnetic field action between the pattern coil and the permanent magnet. This rotation force allows the actuator to rotate.

4. Important uses of the invention

Hard disk drive device according to the present invention is a disk and actuator having a permanent magnet for generating a magnetic field for rotation, by using a PCB as a base of the drive to form a pattern coil and a rotating shaft, which is composed entirely of a stacked type as a drive source By fixing the structure and simplifying the structure of the drive unit so that the rotational force is generated by the interaction between the pattern coil and the permanent magnet, a significant reduction in the mounting space (drive thickness) is brought, and also the pattern coil is laminated on every layer of the PCB As a result, the effective winding of the coil is increased to generate a strong rotational torque in the drive unit.

Description

Hard disk drive unit

1 is a plan view of a conventional hard disk drive.

2 is a sectional view taken along the direction A-A of FIG.

3 is a plan view of a hard disk drive according to the present invention.

4 is a cross-sectional view taken along the direction A-A of FIG.

5 is a configuration diagram of a circuit board which is a main part of FIGS.

6 is a block diagram of a disk according to the present invention.

7 is a state in which magnetic field blocking material is attached to the disk of FIG.

8 is a sectional view showing an actuator drive according to the present invention.

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

* Explanation of symbols for main parts of the drawings

10 hard disk drive 11 printed circuit board (PCB)

12: Spin-Shaft 13: Pivot-Shaft

14: Pattern Coil 15: Disk

15a, 17a: permanent magnet 16a, 16b: bearing

17: Actuator 18: Head

19: Magnetic field blocking material 20: Cover

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive used as an auxiliary storage device of a computer, and more particularly to a slim type hard disk drive device.

Hard disk drives, which have a firm position as a major auxiliary memory device of computers, are continuously progressing in high capacity, small size, and light weight due to the development of various related technologies. This trend is not only an exception for disk drives mounted in laptop computers such as laptop computers, but also for laptop computers such as laptop computers, which has led to continuous development efforts for high capacity, small size and light weight. In particular, with the recent rapid growth of the notebook computer market, the miniaturization and weight reduction of the hard disk drive, which is an essential component of the secondary storage device of the notebook computer, is urgently required.

In particular, due to the inevitable limitations on the mounting space of keyboards and display devices that notebook computers must have, the stress on the flat size is not so great, while notebook computer slimming continues almost indefinitely. The demand for slimming down the thickness of the hard disk drive to be installed as an auxiliary storage device is becoming more urgent.

In the disk drive used as an auxiliary storage device of such a laptop computer, the conventional disk drive 30 is mounted on one side on the base 31, as shown in FIGS. The spindle motor 32 is rotated at high speed by the interaction between the 32a) and the permanent magnets 32b, and the spindle motor 32 is firmly fixed with the clump 33 and a few screws on the hub of the spindle motor 32. A disk 34, which is an information storage medium which is rotated by a disk, a magnetic head 35 for recording information on the disk 34 or reproducing the recorded information, and a pivot shaft formed on the base 31. An actuator 38 fitted to rotate with the pivot bearing 37 at one end thereof, having the magnetic head 35 at one end thereof, and having a bobbin and a coil 38a for driving at the other end thereof; The bobbin and coil 38a of the actuator 38 and the zero The main part consists of a voice coil motor composed of a magnet 38b and a combination of upper and lower yokes 39a and 39b, which are supported by the base 31 as described above. In addition, it is covered by the cover 40 so as not to be damaged by external influences, and also requires the control of the entire system circuit, so that it has a printed circuit board 41 and electrical components.

When the power of the disk drive 30 configured as described above is turned on, the spindle motor 32 is rotated by obtaining a rotational force by the interaction of the coil 32a and the permanent magnet 32b through which current flows under the control of a control circuit. Thus, the disk 34 also rotates. In addition, the actuator 38 obtains a rotational force by the interaction between the coil 38a through which electric current flows under the control of the circuit and the permanent magnet 38b in a fixed state on the lower yoke 39b. It rotates about to move the magnetic head 35 of the tip to the search position. Here, the recording / reproducing of data is performed by the interaction between the head 35 and the disk 34, which is caused by the bearing action caused by the airflow of the disk surface generated as the disk 34 rotates at high speed. The head 35 is raised to perform the recording / reading operation while moving the sieve while maintaining a minute gap.

In the conventional disk drive as described above, various fixing devices including a spindle motor for rotating the disk and a voice coil motor for rotating an actuator having a head need a large mounting space as described above. Therefore, with the problem that the volume of the entire drive becomes large, this has become a problem due to the trend of high capacity, high density and small size, light weight or slim of the hard disk drive.

Accordingly, an object of the present invention is to provide a slim hard disk drive for miniaturization and light weight of a laptop or portable computer.

Another object of the present invention is to provide an essential driving device and mounting structure of a hard disk drive to minimize mounting space (drive thickness) while improving operating performance for slimming a hard disk drive.

In accordance with the above object, the present invention is a conventional hard disk drive, the base of the drive (Multi-Layer) of the printed circuit board (PCB) consisting of a variety of circuits and electrical components are provided A spin shaft for supporting rotation of the disk and a pivot shaft for supporting rotation of the actuator are formed on the PCB, and a pattern coil, which is a means for generating a magnetic field around the spin shaft and the pivot shaft, is formed. In addition, a means for generating a magnetic field (such as a permanent magnet) on the inner concentric circle of the disk is opposed to the pattern coil around the spin shaft so that the disk can rotate on the spin axis without using a separate spindle motor. It is attached so as to generate a rotational force by mutual magnetic field action between the pattern coil and the permanent magnet so that the disk can rotate by this rotational force. At this time, a magnetic shielding material (such as ferrite beads) is attached around the pattern coil facing the permanent magnet in order to block the magnetic field from the permanent magnet attached to the disk to minimize the effect on the head. . In addition, a means for generating a magnetic field (permanent magnet, etc.) is attached to the rear of the actuator so as to rotate on the pivot shaft so as to face the pattern coil on the side of the pivot shaft so that the pattern coil and the permanent magnet are mutually acted. It is characterized in that the actuator to rotate by generating a rotational force by this rotational force.

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings.

3 is a plan view of the hard disk drive device according to the present invention, FIG. 4 is a sectional view taken along the direction A-A of FIG. 1, and FIG. 5 is a state diagram of the circuit board in FIG. Referring to the configuration of the hard disk drive device 10 according to the present invention with reference to FIGS. 3 to 5, the drive 10 is a printed circuit board having various circuits and electrical components: Hereinafter, a base is formed with a PCB 11). The PCB 11 is formed in a multi-layered manner to form a spin shaft 12 and a pivot shaft 13 for rotation support on one side, respectively. Pattern coils 14a and 14b for generating a magnetic field are formed in a stacked manner around the spin shaft 12 and the pivot shaft 13. The disk 15, which is a storage medium, is installed on the spin shaft 12 of the PCB 11 so as to rotate together with the bearing 16a, and also generates a magnetic field on the inner concentric circle of the disk 15. The permanent magnet 15a is attached to face the pattern coil 14a around the spin shaft 12 so that the rotational force is generated by the mutual magnetic field action between the pattern coil 14a and the permanent magnet 15a. At this time, the fraud disk 15 is rotated by the rotational force generated as described above. In addition, the actuator 17 is installed on the pivot shaft 13 of the PCB 11 so as to rotate together with the bearing 16b. One end of the actuator 17 is attached with a read / write head 18 for recording data on the disk 15 or reproducing the recorded data, and on the other side, a permanent magnet for generating a magnetic field. 17a) is attached to face the pattern coil 14b around the pivot shaft 13 so as to generate a rotational force by mutual magnetic field action between the pattern coil 14b and the permanent magnet 17a. 17) to rotate.

In addition, in order to minimize the influence of the permanent magnet 15a attached to the disk 15 and the magnetic field from the pattern coil 14a of the PCB 11 to the storage area and the head 18 of the disk 15. A magnetic field blocking material (such as ferrite beads) 19 is attached around the pattern coil 14a. The cover 20 is assembled to protect and seal the drive 10.

6A and 6B show a state in which the permanent magnet 15a is attached to the disk 15, which is a main part of the hard disk drive device 10, and has a surface on the inner concentric circle of the disk 15. As shown in FIG. Bonding and attaching the permanent magnet (15a) integrally to the one, and the magnetic pole (NS Pole) of the permanent magnet (15a) is connected and arranged, but the magnetic pole in the form disposed between two identical poles of one magnetic pole or As shown in FIG. 6-b, the permanent magnets 15a are divided into several and the magnetic poles are arranged to face the same poles.

7 is a view showing a state in which a magnetic field shielding material is attached to the disk 15. The permanent magnet 15a is bonded to the lower surface of the disk 15, and the permanent magnet 15 is attached to the upper surface of the disk 15 from the permanent magnet 15. In order to block the outflow of the generated magnetic field, the thin shielding material 19 is bonded and attached in the form of a permanent magnet 15a. At this time, the permanent magnet magnetic pole arrangement may take all of the above-described arrangement method.

8 shows a configuration of the actuator device 17, which is a main part of the hard disk drive device 10, and a driving mechanism thereof, and bonds and attaches the permanent magnet 17a to the driving part of the actuator 17. The pattern coil 14b formed around the pivot shaft 13 on the PCB 11 is composed of a signal pattern printed on the PCB 11 and increases the number of effective coil turns. In order to reinforce the rotational force, the pattern coil 14b is formed in a stacked manner.

9 illustrates another embodiment of the attachment of the magnetic field blocking material 19 to the hard disk drive device 10 according to the present invention, and the surface of the disk 15 to which the permanent magnet 15a is not attached. The magnetic field blocking material 19a is attached to an inner surface of the cover 20 for protecting and sealing the drive device 10 to block the leakage of the magnetic field. At this time, the blocking material 19a is formed to face the blocking material 19 attached to an existing base (Base or PCB).

Looking at the specific assembly process of the hard disk drive device 10 according to the present invention configured as described above, after attaching the magnetic field blocking material 19 around the pattern coil 14a of the PCB 11, the permanent magnet ( The disk 15 having the 15a attached thereto is fixed to the spindle 12 on the PCB 11 together with the spindle bearing 16a, and the actuator 17 having the permanent magnet 17a attached thereon pivots the bearing 116b. ) To the pivot shaft 13 on the PCB 11. At this time, each of the pattern coils 14a and 14b laminated and printed on the PCB 11 is compared with the permanent magnets 15a and 17a attached to the disk 15 and the actuator 17. The position of the cover device 20 and the screwing through the screw holes formed on the respective shafts 12 and 13 are completed to complete the assembly of the drive device 10.

Looking at the operation and effects of the hard disk drive device according to the present invention assembled as described above are as follows.

The electric current generated by the motor driving circuit of the PCB 11 passes through the pattern coil 14a to generate a magnetic field, and the generated magnetic field is generated from the magnetic field generated from the permanent magnet 15a attached on the disk 15. The rotation force is generated through the interaction of the disk 15. The disk 15 rotates by the lubrication of the spindle bearing 16a about the spin shaft 12, and is laminated on the PCB 11 at this time. Due to the coil pattern in every layer of the patterned coil 14a, the effective winding of the coil is increased to increase the rotational force, thereby increasing the rotational torque of the disk 15, and also on the disk 15 The magnetic field blocking material 19 blocks the magnetic field generated by the permanent magnet 15a and the pattern coil 14a on the PCB 11 from interfering with the operation of the read / write head 18.

In addition, the actuator 17 which moves the read / write head 18 to the search position with the rotation of the disk 15 causes the pattern coil 14b on the PCB 11 to generate a magnetic field by the current. The generated magnetic field generates a rotational force through interaction with a magnetic field generated from the permanent magnet 17a attached to the actuator 17, and the actuator 17 causes the pivot shaft 13 to rotate. It rotates due to the lubrication of the pivot bearing 16b around the center. At this time, since the pattern coil 14b for generating a magnetic field is laminated and printed on the PCB 11, the actuator 17 is strong. It is possible to obtain rotation torque.

As described above, the hard disk drive device according to the present invention is a permanent magnet that generates a magnetic field for rotation by using a PCB that forms a rotational shaft and a pattern coil as one of the driving sources, which is entirely stacked. By fixing the disk and the actuator, and simplifying the structure of the drive unit so that the rotational force is generated by the interaction between the pattern coil and the permanent magnet, a significant reduction in the mounting space (the thickness of the drive), and also in every layer of the PCB Since the pattern coil is also laminated, the effective winding of the coil is increased to generate a strong rotational torque in the driving unit.

Claims (15)

A disk drive device used as a computer auxiliary storage device, comprising: an actuator (17) having a head (18) for recording and reproducing data, said head (18) having a means for generating a magnetic field to obtain rotational force; A data storage medium 15 having means for generating a magnetic field to obtain rotational force, and respective axes 12 and 13 for installing the data storage medium 15 and the actuator 17, Magnetic fields from the means of the PCB 11 and of the means of the storage medium 15 and of the means of the PCB 11 with other means for generating a rotational force in interaction with the means of the storage medium 15 and the actuator 17. Hard disk drive device characterized in that it comprises a magnetic field shielding material (19) that is installed to block the leakage and the cover (20) for protecting and sealing the drive. 2. A hard disk drive device according to claim 1, wherein the means of the storage medium (15) is formed of permanent magnets (15a). 3. A hard disk drive device according to claim 2, wherein at least one permanent magnet (15a) is attached to concentric circles of the storage medium (15). The hard disk drive device according to claim 1, wherein the PCB is formed in a multi-layer in order to increase the effective magnetic field generation amount of the formed means. 5. A hard disk drive device according to claim 4, wherein the means on the PCB (11) is formed of a pattern coil (14a). 6. The hard disk drive device according to claim 5, wherein the pattern coil (14a) is formed in a stack to increase an effective magnetic field generation amount. 2. A hard disk drive device according to claim 1, wherein the means of the actuator (17) are formed of permanent magnets (17a). 2. The hard disk drive according to claim 1, wherein the means of the PCB 11 for generating another magnetic field for exerting a rotational force corresponding to the magnetic field generated by the means of the actuator 17 is formed of a pattern coil 14b. Device. 10. The hard disk drive apparatus according to claim 8, wherein the means of the PCB (11) is formed in a stack to increase the amount of magnetic field generated to enhance the rotational force of the actuator (17). The hard disk drive apparatus of claim 1, wherein the PCB (11) uses a bare chip to minimize the space occupied by the components on the printed circuit. 2. The barrier material (19) according to claim 1, characterized in that the shielding material (19) is installed around the means of the PCB (11) to prevent a magnetic field from affecting the storage medium (15) and the magnetic head (18). Hard disk drive device. 12. The hard disk drive device of claim 11, wherein the blocking material is a ferrite bead. A disk drive device used as a computer auxiliary storage device, comprising: an actuator having a head (18) for recording and reproducing data, and a permanent magnet (17a) having the head (18) and generating a magnetic field to obtain rotational force. (17), a data storage medium (15) having a permanent magnet (15a) for generating a magnetic field to obtain a rotational force, and respective shafts (12) for installing the data storage medium (15) and the actuator (17). And a printed circuit board (11) which forms pattern coils (14a, 14b) for generating rotational force by interaction with the permanent magnets (15a) and (17a), respectively, and the storage medium. Cover for protecting and sealing the periphery of the pattern coil 14a of the PCB 11 and the drive to block the magnetic field from the permanent magnet 15a of the 15 and the pattern coil 14a of the PCB 11. Magnetic field blocking substances 19 and 19a are respectively attached to 20. Hard disk drive device. The cover 20 according to claim 13, wherein the blocking material 19a of the cover 20 faces the blocking material 19 on the PCB 11 to block the magnetic field leakage to the upper surface of the storage medium 15. Hard disk drive device, characterized in that installed inside the). 15. The hard disk drive device of claim 14, wherein the blocking material (19a) of the cover (20) is a ferrite bead.