KR0138312Y1 - Device for driving optical head - Google Patents

Device for driving optical head Download PDF

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Publication number
KR0138312Y1
KR0138312Y1 KR2019930001736U KR930001736U KR0138312Y1 KR 0138312 Y1 KR0138312 Y1 KR 0138312Y1 KR 2019930001736 U KR2019930001736 U KR 2019930001736U KR 930001736 U KR930001736 U KR 930001736U KR 0138312 Y1 KR0138312 Y1 KR 0138312Y1
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KR
South Korea
Prior art keywords
optical head
holder
drive device
permanent magnet
yoke
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KR2019930001736U
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Korean (ko)
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KR940021254U (en
Inventor
강대열
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구자홍
엘지전자주식회사
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Priority to KR2019930001736U priority Critical patent/KR0138312Y1/en
Publication of KR940021254U publication Critical patent/KR940021254U/en
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Publication of KR0138312Y1 publication Critical patent/KR0138312Y1/en

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857Arrangements for mechanically moving the whole head
    • G11B7/08582Sled-type positioners

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  • Optical Recording Or Reproduction (AREA)

Abstract

본 고안은 광헤드 구동장치에 관한 것으로 광헤드 구동장치의 구성요소중 엑츄에이터 및 구동부를 메인기판위에 직접 설치하여 광헤드 구동장치의 소형/박형화와 함께 제작비용을 절감한 것이며 이는 광헤드가 디스크 반경 방향으로 이동하게 안내하는 가이드레일과, 가이드레일 위에 위치한 영구자석과 함께 광헤드를 이동시켜 주는 여자코일과, 광헤드는 영구자석에 부착되어 이동하도록 홀더를 설치하고 이 홀더의 옆면에 포커스용 영구자석이 위치하고 그 외측에는 요크를 설치하여 이 요크와 광헤드홀더를 댐퍼로 연결하여 구성된다.The present invention relates to an optical head drive device, which directly installs an actuator and a drive part on a main board among the components of the optical head drive device, thereby reducing the manufacturing cost with the miniaturization and thinning of the optical head drive device. A guide rail for guiding movement in a direction, a excitation coil for moving the optical head together with a permanent magnet located on the guide rail, and a holder for mounting the optical head attached to the permanent magnet for movement and permanently for focus on the side of the holder. The magnet is located and a yoke is provided on the outside to connect the yoke and the optical head holder with a damper.

Description

광헤드 구동장치Optical Head Drive

제1도는 종래의 IC타입 광헤드 구동장치의 구성도.1 is a block diagram of a conventional IC type optical head drive device.

제2도는 본 고안의 광헤드 구동장치의 구성도.2 is a block diagram of an optical head drive device of the present invention.

제3도는 본 고안의 광헤드 구동장치의 단면도.3 is a cross-sectional view of the optical head drive device of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 디스크 2 : 메인회로기판1: disc 2: main circuit board

16 : 트랙킹여자코일 17 : 가이드레일16: tracking woman coil 17: guide rail

18 : 영구자석 19 : 요크(YOKE)18: permanent magnet 19: YOKE

20 : 포커싱영구자석 21 : 광헤드홀더20: focusing permanent magnet 21: optical head holder

22 : 댐퍼 23 : 광헤드22: damper 23: optical head

24 : 포커싱여자코일24: focusing woman coil

본 고안은 광헤드 구동장치에 관한 것으로 보다 상세히는 광헤드 구동장치의 구성 요소 중 액츄에이터 및 구동부를 메인기판위에 직접 설치하여 광헤드 구동장치의 소형/박형화와 함께 제작비용을 절감한 것이다.The present invention relates to an optical head drive device, and more particularly, to install an actuator and a driving unit directly on a main board among the components of the optical head drive device, thereby reducing the manufacturing cost with the miniaturization / thinning of the optical head drive device.

종래 IC타입 광헤드 구동장치는 제1도에서 보인바와 같이 가이드샤프트(4)에 고정되어 구동부의 구동력으로 수평이동되는 메인베이스(5)와, 메인베이스(5)를 이동시키는 모터(6)를 포함한 기어(7)의 조합체로 구성된 구동부와, 광헤드(8)가 결합고정된 광헤드홀더(9)로 구성되었다.Conventional IC type optical head drive device is fixed to the guide shaft (4) as shown in Figure 1, the main base (5) which is horizontally moved by the driving force of the drive unit, and the motor (6) for moving the main base (5) It consists of the drive part which consists of the combination of the gears 7, and the optical head holder 9 by which the optical head 8 was couple | bonded and fixed.

메인베이스(5)상에는 트랙킹코일(10)과 포커싱코일(11)을 안내하기 위한 요크(12)와 그 외주에 근접하여 영구자석(13)이 설치되고 광헤드홀더(9)는 하부에 홀더축(14)이 형성되어 메인베이스(5)에 구성된 요크(12)에 결합고정되었다.On the main base 5, a yoke 12 for guiding the tracking coil 10 and the focusing coil 11 and a permanent magnet 13 are installed in close proximity to the outer circumference thereof, and the optical head holder 9 has a holder shaft below. (14) was formed and fixed to the yoke (12) formed in the main base (5).

상기 IC타입 광헤드 구동장치는 신호처리부(3)가 있는 메인회로기판(2)과 분리 되어 다음과 같은 동작을 보인다.The IC type optical head driving device is separated from the main circuit board 2 having the signal processing unit 3 and exhibits the following operation.

광디스크(1)상에 형성된 정보비트열에 박형 IC타입 광헤드(8)에 의해 광을 조사하여 포커싱 및 트랙킹 에러신호를 검출하고 이 신호에 따라 신호처리부(3)는 요크(12)와 요크내벽 그 외주에 위치하는 영구자석(13)과, 그리고 포커싱코일(11) 및 트랙킹코일(10), 광헤드(8)로 구성되는 2축 엑츄에이터를 구동시켜 광헤드(8)를 포커싱 및 트랙킹 방향으로 서보를 행하게 하여 빔스폿이 디스크(1)의 정보비트옆에 정확히 따라 가도록 한다.The information bit stream formed on the optical disc 1 is irradiated with light by a thin IC type optical head 8 to detect a focusing and tracking error signal, and according to the signal, the signal processing unit 3 includes a yoke 12 and a yoke inner wall. Servos the optical head 8 in the focusing and tracking directions by driving a two-axis actuator composed of a permanent magnet 13 located at an outer circumference and a focusing coil 11, a tracking coil 10, and an optical head 8. So that the beam spot exactly follows the information bits of the disc 1.

디스크(1)에 기록된 정보의 외곽과 내측에 있는 정보비트열을 읽으려면 구동부의 모터(6)를 구동시켜 기어(7)에 회전력을 전달하고 기어(7)는 가이드레일(15)에 맞물려 메인베이스(5)가 가이드샤프트(4)를 따라 이동되도록 함으로서 메인베이스(5)위에 고정된 광헤드(8)부 전체를 원하는 곳으로 이동시킨다.To read the information bit strings on the outer and inner sides of the information recorded on the disk 1, the motor 6 of the drive unit is driven to transmit rotational force to the gear 7, and the gear 7 is engaged with the guide rail 15. By moving the main base 5 along the guide shaft 4, the entire optical head 8 portion fixed on the main base 5 is moved to a desired place.

이러한 종래의 IC타입 광헤드 구동장치는 포커싱과 트랙킹 서보를 행하는 2축 엑츄에이터의 구성을 보여 많은 부품의 조합으로 조립이 불편하고 광헤드 구동장치와 메인회로기판이 분리되어 셋트 면적의 증대로 소형화가 불가능하여 광헤드 구동장치가 차지하는 만큼의 높이로 인해 박형화가 불가능한 문제점이 있었다.Such a conventional IC type optical head drive device has a configuration of a two-axis actuator that performs focusing and tracking servo, which is inconvenient to assemble by a combination of many parts, and the optical head drive device and the main circuit board are separated, thereby miniaturizing the set area. There was a problem in that it is impossible to thin because of the height as high as the optical head drive occupies.

본 고안의 목적은 광헤드 구동장치를 메인회로기판상에 직접 부착하여 작은 부피의 광헤드 구동장치를 제공하기 위한 것이다.An object of the present invention is to provide a small volume of the optical head drive by attaching the optical head drive directly on the main circuit board.

본 고안의 또 다른 목적은 광헤드 구동장치의 부품수를 줄여 소형 /박형화된 구동장치를 제공한 것이다.Another object of the present invention is to provide a small / thin drive device by reducing the number of parts of the optical head drive device.

상기 목적을 달성하기 위한 본 고안의 광헤드 구동장치는 메인회로기판에 직접 솔더링 할 수 있는 트랙킹 및 이동용 여자코일과 가이드레일 그리고, 영구자석으로 광헤드 이동장치를 구성하고 이 장치와 함께 요크 및 포커스용 영구자석 그리고, 광헤드홀더, 포커스용 여자코일로 2축 엑츄에이터를 구성하였다.The optical head drive device of the present invention for achieving the above object is composed of a tracking and moving excitation coil and guide rail, which can be directly soldered to the main circuit board, and the optical head moving device with a permanent magnet and yoke and focus with the device The permanent magnet, optical head holder, and excitation coil for focus consisted of a two-axis actuator.

본 고안의 광헤드 구동장치의 구성은 제2도 및 제3도에서 보인 바와같이 메인회로기판(2)에 광헤드의 트랙킹 및 이동용 여자코일(16)이 설치되고, 이를 중심으로 광헤드부가 디스크(1) 반경으로 이동하는 것을 안내하는 가이드레일(17)을 고정하였다.In the construction of the optical head drive device of the present invention, as shown in FIG. 2 and FIG. 3, the excitation coil 16 for tracking and moving the optical head is installed on the main circuit board 2, and the optical head portion is a disk. (1) The guide rail 17 for guiding the movement in the radius was fixed.

그리고, 광헤드부는 광헤드(23)를 지지하는 광헤드홀더(21)와, 상기 광헤드홀더(21)의 측면에 형성된 포커싱여자코일(24)과 상기 포커싱여자코일(24)과 마주하여 형성된 포커싱영구자석(20)이 형성된 요크(19)와 상기 요크(19)는 영구자석(18)의 양단에 고정하고, 상기 광헤드홀더(21)와 요크(19)를 댐퍼(22)에 의해 연결되도록 구성하였다.The optical head portion is formed to face the optical head holder 21 supporting the optical head 23 and the focusing excitation coil 24 and the focusing excitation coil 24 formed on the side of the optical head holder 21. The yoke 19 having the focusing permanent magnet 20 and the yoke 19 are fixed to both ends of the permanent magnet 18, and the optical head holder 21 and the yoke 19 are connected by a damper 22. It was configured to.

이와 같이 구성된 본 고안의 작용효과는 다음과 같다.Effects of the present invention configured as described above are as follows.

광 디스크(1)상에 형성된 정보비트열에 박형/IC타입 광헤드(23)가 광을 조사하여 포커싱 및 트랙킹 에러신호를 검출하여 메인회로기판(2)의 신호처리부에 입력한다.The thin / IC type optical head 23 irradiates light to the information bit string formed on the optical disk 1, detects a focusing and tracking error signal, and inputs the signal to the signal processing portion of the main circuit board 2.

상기 신호에 따라 신호처리부는 요크(19), 포커싱영구자석(20), 광헤드홀더(21), 포커싱여자코일(24)의 구성에 의해 포커스 방향으로 서보를 행하고, 가이드레일(17), 트랙킹 및 이동용 여자코일(16), 영구자석(18)의 구성에 의해서 트랙킹 방향으로 서보를 행하여 빔스폿이 정확히 디스크(1)상의 정보비트열에 따라 가도록 한다.According to the signal, the signal processor performs servo in the focus direction by the configuration of the yoke 19, the focusing permanent magnet 20, the optical head holder 21, and the focusing excitation coil 24, and the guide rail 17 and the tracking. And servo in the tracking direction by the configuration of the moving excitation coil 16 and the permanent magnet 18 so that the beam spot exactly follows the information bit string on the disc 1.

디스크(1)의 프로그램 안쪽 또는 바깥쪽의 정보비트열을 읽으려면 트랙킹 및 이동용 여자코일(16)을 구동시켜 가이드레일(17)을 따라 광헤드(23)가 놓여 있는 영구자석(18)(20)을 움직여 원하는 위치로 이동시킨다.To read the information bit string inside or outside the program of the disc 1, the tracking and moving excitation coil 16 is driven to permanent magnets 18 and 20 with the optical head 23 placed along the guide rails 17. Move) to the desired position.

본 고안의 광헤드 구동장치는 메인회로기판에 직접 구성되어 포커싱과 트랙킹이 신호처리부의 신호에 따라 작동하도록 함으로서 전체 부피와 높이가 종래 장치에 비해 현저히 감소 또는 축소되어 박형화, 소형화가 가능하고 종래의 모터와 기어의 조합을 포함한 광헤드 안내수단등 구동부의 구성요소를 줄일 수 있어 낮은 단가로 광헤드 구동장치를 제작할 수 있는 것이다.The optical head drive device of the present invention is configured directly on the main circuit board so that the focusing and tracking can be operated according to the signal of the signal processing unit, so that the overall volume and height are significantly reduced or reduced compared to the conventional device, thereby making it thinner and smaller. It is possible to reduce the components of the drive unit, such as the optical head guide means including a combination of the motor and gears to manufacture the optical head drive device at a low cost.

Claims (2)

광헤드는 영구자석에 부착되어 이동하도록 홀더를 설치하고 이 홀더의 옆면에 포커스용여자코일을 설치하며, 포커스용여자코일과 마주하여 포커스용영구자석이 위치하고 그 외측에는 요크를 설치하여 이 요크와 광헤드홀더를 댐퍼로 연결하여 구성된 광헤드와, 상기 광헤드가 디스크 반경방향으로 이동하는 것을 안내하는 가이드레일과, 상기 가이드레일에 얹혀진 영구자석과 함께 광헤드를 이동시켜주는 여자코일을 구비한것을 특징으로하는 광헤드 구동장치.The optical head is provided with a holder for movement and attached to the permanent magnet, and a focus excitation coil is installed on the side of the holder, and a focus permanent magnet is located facing the focus excitation coil, and a yoke is installed on the outside to install the yoke and An optical head configured by connecting the optical head holder with a damper, a guide rail for guiding the optical head to move in the radial direction of the disk, and an excitation coil for moving the optical head together with a permanent magnet mounted on the guide rail. An optical head drive device, characterized in that. 제1항에 있어서, 가이드레일과 트랙킹여자코일은 메인회로기판에 직접 솔더링하여 구성된 것을 특징으로하는 광헤드 구동장치.The optical head driving apparatus of claim 1, wherein the guide rail and the tracking excitation coil are directly soldered to the main circuit board.
KR2019930001736U 1993-02-10 1993-02-10 Device for driving optical head KR0138312Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019930001736U KR0138312Y1 (en) 1993-02-10 1993-02-10 Device for driving optical head

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KR2019930001736U KR0138312Y1 (en) 1993-02-10 1993-02-10 Device for driving optical head

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KR940021254U KR940021254U (en) 1994-09-24
KR0138312Y1 true KR0138312Y1 (en) 1999-04-15

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