• 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 disc recording medium. The disc recording medium according to the present invention is provided with a rigid reinforcing portion formed on its edge portion to reinforce its strength.
    公开号:KR19990038749A
    申请号:KR1019970058593
    申请日:1997-11-06
    公开日:1999-06-05
    发明作者:김수경
    申请人:구자홍；엘지전자 주식회사；
    IPC主号:
    专利说明:

    Disc record carrier
    The present invention relates to a disc recording medium.
    In recent years, discs have been required to have large capacities, and as a result, commercially available magneto-optical discs have a size of about 650 MB on a 120 mm outer diameter disc such as a compact disc (hereinafter referred to as "CD"). It can record / play back and is expected to be large in capacity from 6 GB to 14 GB in the future. In addition, a recording method using magnetic field modulation using a magnetic head is adopted for recording, and a method of detecting a change in polarization angle according to a photo-magnetic conversion characteristic by using a photoelectric element during reproduction is adopted. In the process of recording information, the magnetic head records the information by magnetizing the information recording surface of the magneto-optical disk, followed by the process of heating the magneto-optical material applied to the surface of the magneto-optical disk to the Curie temperature to lose the magnetism. Done.
    On the other hand, the conventional CD has a rotational speed of 500-600 rpm (revolutions per minute; "rpm") when accessed, but a large-capacity high-density disk has a rotational speed of 1800 rpm, and the rotational speed of the disk according to the demand for high speed in the future. Is on a gradual pace. This tends to be a major obstacle to high speed due to the resonance effect of the vibration frequency due to the rotational speed of the high density disk.
    1, a disc according to the prior art will be described.
    1A, the clamp portion 4 is formed to a first thickness in the form of a protrusion in the center of the disk and is in contact with the clamper when the disk is rotated, and is formed to a second thickness adjacent to the clamp portion 4. A disc recording medium according to the prior art is shown, which has an information recording and reproducing section 8 for recording / reproducing data, and an edge portion 6 formed in an elongated form adjacent to the information recording and reproducing section 8. The clamp portion 4 is a part in contact with the clamper (not shown) and serves to fix the disk to rotate smoothly when the disk is rotated. In addition, the information recording and reproducing section 8 is configured in such a way that the clamp section 4 extends to a second thickness and becomes a part capable of recording / reproducing information. On the other hand, the edge portion 6 is formed with a circumferential region having a predetermined width. However, a large error occurs during recording / reproducing of information, and thus is not used for recording / reproducing of information. The cross section of each part at this time is shown in FIG. 1B. In detail, the clamp portion 4 is formed to a thickness of about 1.2 mm, and the information recording and reproducing portion 8 is formed to a thickness of about 0.6 mm. The clamp unit 14 and the information recording and reproducing unit 8 are adjacent to each other. Further, the edge portion 6 extends in a circular shape in the information recording and reproducing portion 8, and is formed in the same thickness.
    On the other hand, as the disk 2 rotates at a predetermined rotational angular velocity , A slight amplitude displacement occurs in the edge portion 6. At this time, when the rotational angular velocity is increased at a higher speed, greater vibration occurs in the outer peripheral portion of the disc, which causes information to be recorded at an incorrect position when recording the information, thereby preventing the information from being reproduced correctly.
    As described above, in the disc recording medium according to the related art, a recording / reproducing error is larger in the outer peripheral portion than the center portion of the disc during recording / reproducing of information. Particularly, due to the resonance effect of the vibration frequency due to the rotational speed during high speed rotation, It is a big obstacle to high speed.
    Accordingly, it is an object of the present invention to provide a disc recording medium with minimal vibration.
    1A is a plan view of a disk according to the prior art.
    1B is a cross-sectional view of a disk according to the prior art.
    2A is a cross-sectional view of a disk according to an embodiment of the present invention.
    2B is a perspective view of FIG. 2A.
    3 is a cross-sectional view of a disk according to another embodiment of the present invention.
    4 is a cross-sectional view of a disk according to another embodiment of the present invention.
    <Explanation of symbols for major parts of drawings>
    2, 12: disk 4, 14: clamp portion
    6: rim 16: rigid reinforcement
    8, 18: information recording and reproducing section 20: annular band
    22: annular iron core
    In order to achieve the above object, the disc recording medium according to the present invention is provided with a rigid reinforcing portion formed on its edge portion to reinforce strength.
    Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.
    Referring to Figures 2A to 4 will be described a preferred embodiment of the present invention.
    Referring to FIG. 2A, a clamp portion 14 protruding in the center of the disk and having a first thickness to contact the clamper during rotation of the disk, and a second thickness adjacent to the clamp portion 14 and formed at a second thickness, are provided. A disk according to an embodiment of the present invention is shown having an information recording and reproducing section 18 for recording / reproducing a recording medium, and a rigid reinforcing section 16 having a third thickness at the edge portion of the disk to minimize vibration. have. Since the functions and operations of the clamp unit 14 and the information recording and reproducing unit 18 are the same as those in FIG. 1, detailed descriptions thereof will be omitted. On the other hand, the thickness of the rigid reinforcing portion 16 formed on the edge of the disk has a value equal to or less than the thickness of the clamp portion 14, it is determined in a range that can reduce the vibration of the disk. On the other hand, the rigid reinforcing portion 16 increases the strength of the edge portion of the disk to perform a function to reduce the vibration variation generated in the edge portion during high-speed rotation. This makes it possible to reduce the vibration of the disc. A perspective view of the disc at this time is shown in FIG. 2B.
    Referring to FIG. 3, a clamp portion 14 protruding in the center of the disk and having a first thickness to contact the clamper during rotation of the disk, and a clamp thickness 14 adjacent to the clamp portion 14 and formed to a second thickness are provided. A disk according to another embodiment of the present invention is shown having an information recording and reproducing section 18 for recording / reproducing a recording, and an annular band that is mounted in an annular shape to surround an edge of the disk to minimize vibration. Since the functions and operations of the clamp unit 14 and the information recording and reproducing unit 18 are the same as those in FIG. 1, detailed descriptions thereof will be omitted. On the other hand, the annular band is formed in an annular band shape that is mounted to surround the rim of the disk, and strengthens the strength of the rim. On the other hand, the width of the annular band will be irrelevant as long as it does not exceed the edge of the disk. As a result, the annular band is mounted on the rim of the disc to reduce the amplitude variation of the rim generated at high speed of rotation of the disc, thereby reducing vibration of the disc.
    Referring to FIG. 4, a clamp portion 14 protruding in the center of the disk is formed to a first thickness and is in contact with the clamper when the disk is rotated, and is formed adjacent to the clamp portion 14 to a second thickness. A disc according to another embodiment of the present invention is shown having an information recording and reproducing section 18 for recording / reproducing a recording medium and an annular iron core 22 inserted into an edge portion of the disc to minimize vibration. Since the functions and operations of the clamp unit 14 and the information recording and reproducing unit 18 are the same as those in FIG. 1, detailed descriptions thereof will be omitted. On the other hand, the annular iron core 22 has a structure in which the iron core is inserted into the disk rim portion to strengthen the strength of the rim portion. As a result, the annular core 22 is inserted into the disc rim so that the amplitude variation of the rim portion generated at high speed of rotation of the disc can be reduced, thereby reducing vibration of the disc.
    As described above, by increasing the strength at the edge of the disc, the vibration of the disc is attenuated so that recording / reproducing of information can be performed smoothly.
    As described above, the disk of the present invention has an advantage of smoothing recording / reproducing of information by minimizing vibration of the disk by reinforcing its edge portion strength.
    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 (4)
    [1" claim-type="Currently amended] A magneto-optical disc having a shape protruding in the center of a magneto-optical disk and contacting the clamper when the disk is rotated, and an information recording and reproducing unit adjacent to the clamp and formed in a circular shape to record / reproduce information.
    And a rigid reinforcing part formed on the disc rim to reinforce strength.
    [2" claim-type="Currently amended] The method of claim 1,
    And the rigid reinforcing portion has an annular jaw protruding from the surface of the disk.
    [3" claim-type="Currently amended] The method of claim 1,
    And an annular band of metal material annularly mounted to surround the disc rim.
    [4" claim-type="Currently amended] The method of claim 1,
    And a high-strength annular core inserted into the disc rim.
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    同族专利:
    公开号 | 公开日
    KR100514252B1|2005-11-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-11-06|Application filed by 구자홍, 엘지전자 주식회사
    1997-11-06|Priority to KR1019970058593A
    1999-06-05|Publication of KR19990038749A
    2005-11-28|Application granted
    2005-11-28|Publication of KR100514252B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970058593A|KR100514252B1|1997-11-06|1997-11-06|Disc for recording media|
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