• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a suspension device for minimizing fluctuations caused by air resistance of a suspension device in a magnetic disk device or a magneto-optical disk device. The present invention relates to a suspension device to minimize flow due to air resistance. The suspension device of the present invention includes a head for recording information on the disk surface, a suspension for applying a predetermined load to the head, and shielding means for shielding the suspension and air flow applied to the head. The suspension device according to the present invention can minimize the air resistance applied to the suspension to improve the reliability and accuracy during recording / playback.
    公开号:KR19990038374A
    申请号:KR1019970058061
    申请日:1997-11-04
    公开日:1999-06-05
    发明作者:김수경
    申请人:구자홍；엘지전자 주식회사；
    IPC主号:
    专利说明:

    Suspension device
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for a recording medium, and more particularly, to a suspension apparatus for minimizing fluctuation due to air resistance of a suspension apparatus in a magnetic disk apparatus or a magneto-optical disk apparatus.
    Recently, as a large-capacity auxiliary storage device for a personal computer (hereinafter referred to as "PC"), a magneto optical disk ("MOD") has been spotlighted as a main auxiliary storage device, and has developed into a large capacity. . MOD is removable like a Compact Disk-ROM (CD-ROM) unlike a general hard disk (Portable Disk) has the advantage of being portable as well as recordable. MOD recording method tends to become more dense in the future because it adopts a magnetic field modulation recording method like a hard disk. MOD, which is commercially available up to now, can record and play about 650 MB of information on a 120mm outer diameter disc such as the size of a compact disc (CD), and is expected to be enlarged to 6 GB or 14 GB in the future.
    In the magneto-optical recording method, a recording method is adopted through magnetic field modulation using a magnetic head at the time of recording, and at the time of reproduction, a change in the polarization angle according to the optical-magnetic conversion characteristics is performed by using an optoelectronic device (for example, a laser Photo Diode) is used to detect. In the process of recording the information, the magneto-optical material applied to the surface of the MOD is heated to the Curie temperature to lose the magnetism, followed by the magnetic head recording the information by magnetizing the information recording surface of the MOD. MOD recording / reproducing devices that have been commercialized or will be released in the future include a sliding head type or a floating type magnetic head slider. In this sliding type and floating type, when the magnetic head wishes to record information on the disk, the head located on the outer surface of the disk must land at an arbitrary position on the disk to contact the disk surface.
    In detail, when the magnetic head is sliding, the magnetic head is in contact with the surface of the disc at the start of information recording (Contact Start) and the contact with the surface of the disc is terminated at the completion of information recording. In addition, when the magnetic head is floating, the information proxy magnetic head undergoes a transient time in which the magnetic head makes instantaneous contact with the disk surface by the inertia of the head slider itself. In addition, the magnetic head is recorded on the disk surface and the head surface while the magnetic head floats by a predetermined amount from the disk surface by the air file pressure caused by the relative motion of the disk. Therefore, in the case of the floating magnetic head, the contact starts at the moment when the head rests on the disk surface by its kinetic energy (Contact start), and as the disk starts to rotate, a flow velocity is generated on the disk surface. As a result of the pressure generated between the magnetic head and the disk surface, the magnetic head starts to take off from the moment when the magnetic head overcomes the head slider itself and the applied load, and the contact with the disk surface is terminated.
    As such, the head of the magneto-optical recording / reproducing apparatus inevitably undergoes a contact start stop (hereinafter referred to as "CSS") contact with the disk surface during the recording process.
    1 shows a schematic perspective view of a suspension device of a magnetic head slider used in a recording / reproducing device of a MOD.
    Referring to FIG. 1, a suspension device of a magnetic head slider includes a head slider 3 for converting an electrical signal into a magnetic signal and recording information on a disc, and a suspension having one end fixed to the head slider to serve as an elastic spring ( 2) is provided.
    The suspension 2 is connected to the head slider 3 via an elastic bend 4 located on the top surface of the head slider 3. When the head slider 3 records a signal on the information recording surface of the disc, a predetermined load is applied to the head slider by the elastic spring force of the suspension 2.
    Fig. 2 is a schematic longitudinal sectional view for explaining the recording / reproducing apparatus of the MOD.
    Referring to Fig. 2, the recording / reproducing apparatus of the MOD includes a suspension device of a magnetic head slider having a head slider 3, a suspension 2, an actuator 10 for driving the magnetic head slider 3, It is provided with a spindle motor 8 for rotating the disk 7.
    The spindle motor 8 has a turntable 9 which seats the disk 7 and rotates with the driving force of the motor. The disc 7 rotates at a predetermined angular velocity As the spindle motor 8 rotates. A magnetic material is coated on the information recording surface of the disc 7. As a result, the head slider 3 records the information as a magnetic signal while traveling on the information recording surface of the disc 7. The actuator 10 causes the head slider 3 to travel in the radial or tangential direction of the disc 7. The MOD recording / reproducing apparatus is provided with an optical pickup device 11 which is positioned on the lower surface of the disk 7 with the air film therebetween to heat the magnetized material applied to the disk 7 to a curie temperature. .
    When the head slider 3 records information on the information recording surface of the disc 7, the optical pickup device 11 has a curie temperature, which is a temperature at which the magnetic material applied to the disc causes a transition from non-ferromagnetic to ferromagnetic. Heat up to.
    Figure 3 shows a perspective view of the air flow applied to the suspension and the head slider. 4 shows a side view of the suspension and head slider showing the flow of the suspension and head slider.
    In Fig. 3, in the conventional suspension device shown, the suspension device is placed in a direction opposite to the radial direction of the disc, and the air flow is directed from the front portion of the head slider toward the suspension rear surface. For reference, there is another type of suspension device in which the suspension device is placed in a direction opposite to the tangential direction of the disc so that the air flow is directed to the side of the head slider and the suspension.
    3 and 4, as the spindle motor 8 rotates, the disc 7 rotates at an angular velocity Ω. Then, the head slider 3 rises to a certain height by the floating force according to the flow rate of the disk 7 and the elastic spring force of the suspension 2, and moves linearly in the X axis (radial direction) and Y axis (tangential direction). In this way, random access is made on the information recording surface of the disc 7. After a certain time has elapsed while the disk is being rotated by the spindle motor 8, when the speed reaches a constant speed (about 1800 rpm), the disk is floated by the rotational speed of the disk, and an air film (approximately 4 μm) is formed between the disk surface and the magnetic head surface. It exists. At this time, air flow due to the rotation of the disk 7 occurs on the surface of the disk 7 which is rotating at a high speed. This air flow is not constant on the surface of the disc, and the flow velocity increases in proportion to the disc linear velocity toward the outer periphery of the disc 7 so that the suspension 2 and the head slider 3 at the inner and outer periphery have differential air flow resistance. Will be added.
    In detail, due to the flow rate generated as the disk rotates, the suspension 2 and the head slider 3 have a lifting force in the vertical direction (Z-axis direction) on the disk surface, and the tangential direction (Y-axis). Direction, dragging forces act simultaneously.
    As indicated by the arrows by these forces, the suspension 2 and the head slider 3 have a floating-height fluctuation in the Z-axis direction and a tracking fluctuation in the radial direction (X-axis direction). ) And vibration due to position fluctuation in the tangential direction (Y-axis direction). In particular, the air flow becomes a turbulent flow in the laminar flow or vortex as the structure of the suspension (2) in the middle of the flow rate becomes a complex structure that has a vibration in the suspension (2) Cause problems. As a result, in the conventional MOD recording / reproducing apparatus, air flow acting on the suspension causes position error of the magnetic head for recording information, thereby degrading reliability and accuracy in recording / reproducing.
    Accordingly, it is an object of the present invention to provide a suspension device that can improve the reliability and accuracy in recording / reproducing by minimizing fluctuations caused by air resistance generated as the disk rotates.
    1 is a schematic perspective view showing a suspension device of a magnetic head slider used in a magneto-optical disk drive.
    Fig. 2 is a schematic longitudinal sectional view showing a recording / playback apparatus of a magneto-optical disc.
    3 is a perspective view illustrating air flow applied to the suspension and the head slider.
    4 is a side view of the suspension and head slider showing the flow of the suspension and head slider.
    5 is a perspective view showing a suspension device according to an embodiment of the present invention.
    <Description of Symbols for Main Parts of Drawings>
    2,24: Suspension 3,22: Head Slider
    4: elastic flex portion 7, 21: disk
    8: spindle motor 9: turntable
    10: actuator 11: optical pickup device
    26: suspension cover
    In order to achieve the above object, the suspension device of the present invention includes a head for recording information on the disk surface, a suspension for applying a constant load to the head, and shielding means for shielding the air flow applied to the suspension and the head.
    Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.
    Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 5.
    5 is a perspective view for clearly showing a suspension device according to an embodiment of the present invention.
    Referring to FIG. 5, the suspension device according to the present invention includes a suspension cover which is covered by the suspension 24 and the head slider 22 on all surfaces except the bottom surface (the magnetic field generating magnetic field) on which the head is located ( 26).
    The suspension 24 serves to apply a constant load to the head slider 22 by its elastic force. At the bottom of the head slider 22, a head for converting an electrical signal into a magnetic signal and recording information on the surface of the disk 21 is located. Suspension cover 26 captures suspension 24 and head slider 22. At this time, the suspension cover 26 is opened at the bottom of the head slider 22 to secure the recording operation area of the head. Air flow generated while the disk 21 rotates is applied to the suspension cover 26. Air resistance such as flotation and drag due to this airflow is applied only to the suspension cover 26. That is, the air flow passing through the suspension 24 and the head slider 22 is shielded by the suspension cover 26, thereby preventing fluctuation caused by the air resistance of the head slider 22. Therefore, the suspension 24 and the head slider 22 are not directly applied to this air flow, thereby minimizing vibration. As a result, the suspension device of the present invention can minimize position error by preventing vibration of the magnetic head by minimizing the floating force and drag applied to the suspension 24. In particular, when the suspension device of the present invention is applied to a recording / reproducing apparatus of a high-speed magneto-optical recording medium, the vibration according to the high-speed speed can be minimized, thereby improving the reliability and accuracy in the recording / reproducing operation of the high-speed magneto-optical recording medium. It can be improved.
    As described above, the suspension apparatus according to the present invention can minimize the air resistance applied to the suspension to improve the reliability and accuracy during recording / reproducing.
    Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] A head for recording information on the disk surface;
    A suspension for applying a predetermined load to the head;
    Suspension means for shielding the air flow applied to the suspension and the head.
    [2" claim-type="Currently amended] The method of claim 1,
    The shielding means further comprises a shielding wall which is covered on the upper surface and the wall of the suspension and the head.
    类似技术:
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-11-04|Application filed by 구자홍, 엘지전자 주식회사
    1997-11-04|Priority to KR1019970058061A
    1999-06-05|Publication of KR19990038374A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970058061A|KR19990038374A|1997-11-04|1997-11-04|Suspension device|
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