KR100211922B1 - Object lens driving device of optical pickup - Google Patents
Object lens driving device of optical pickup Download PDFInfo
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- KR100211922B1 KR100211922B1 KR1019960007017A KR19960007017A KR100211922B1 KR 100211922 B1 KR100211922 B1 KR 100211922B1 KR 1019960007017 A KR1019960007017 A KR 1019960007017A KR 19960007017 A KR19960007017 A KR 19960007017A KR 100211922 B1 KR100211922 B1 KR 100211922B1
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- objective lens
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- optical pickup
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0935—Details of the moving parts
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
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Abstract
본 발명은 코일의 권선구조 및 요크 형상을 개선하여 전체 크기를 소형화할 수 있을 뿐만 아니라 고속으로 회전하는 광디스크와 대물렌즈의 충돌을 방지할 수 있도록 하는 광픽업의 대물렌즈 구동장치에 관할 것으로, 이러한 광픽업의 대물렌즈 구동장치는 삽입에 의한 끼움으로 자석(M)이 고정되도록 상기 요크베이스(100)의 지지편(120) 상부 양측단을 상호 대향되게 내측으로 절곡시킨 끼움고정부재(500)와, 상기 끼움고정부재(500)에 고정된 자석(M)사이에 상기 고정홀더(200)의 지지와이어(210)에 탄력있게 지지된 몸체(610)의 전후 양측부에 수평방향으로 길게 소정 폭의 수평권취홈(620)이 요입되는 대물렌즈홀더부재(600)와, 상기 대물렌즈홀더부재(600)의 상방이동을 제한하도록 판상의 몸체(710) 소정위치에 대물렌즈홀더부재(600)에 안착된 대물렌즈(L)가 노출되는 구멍(720)이 통공되고, 상기 몸체(710) 양측단에 요크베이스(100)의 양측 외면에 면접촉 상태로 밀착되게 고정편(730)이 하향으로 절곡되고, 상기 고정편(730)이 밀착되는 지지편(120)의 외측면에 한쌍의 고정홈(121)을 요입하여 상기 고정편(730)의 내측면에 상기 고정홈(121)에 대응되게 내향으로 고정돌기(740)가 돌설되는 충돌방지부재(700)로 구성됨으로서 광픽업을 소형화할 수 있을 뿐만 아니라 기기의 신뢰성을 향상시킬 수 있는 효과가 있게 되는 것이다.The present invention relates to the objective lens driving apparatus of the optical pickup that can not only reduce the overall size by improving the winding structure and the yoke shape of the coil, but also prevent the collision between the optical disk and the objective lens rotating at high speed. The objective lens driving device of the optical pickup includes a fitting fixing member 500 in which both ends of the upper end portions of the support piece 120 of the yoke base 100 are bent inward to face each other such that the magnet M is fixed by insertion. A predetermined width is elongated horizontally in both front and rear sides of the body 610 elastically supported by the support wire 210 of the fixing holder 200 between the magnets M fixed to the fitting member 500. The objective lens holder member 600 into which the horizontal winding groove 620 is recessed, and the plate-shaped body 710 is seated on the objective lens holder member 600 at a predetermined position to limit upward movement of the objective lens holder member 600. Objective lens (L) The hole 720 is bent through, and the fixing piece 730 is bent downward to be in close contact with the outer surface of the both sides of the yoke base 100 on both sides of the body 710, the fixing piece 730 A pair of fixing grooves 121 are inserted into the outer surface of the support piece 120 to be in close contact with the fixing groove 740 inwardly corresponding to the fixing grooves 121 on the inner surface of the fixing piece 730. Being composed of an anti-collision member 700 can not only miniaturize the optical pickup, but also improve the reliability of the device.
Description
본 발명은 광학식 디스크 드라이브의 광픽업에 관한 것으로, 특히, 코일의 권선구조 및 요크 형상을 개선하여 전체 크기를 소형화 할 수 있을 뿐만 아니라 고속으로 회전하는 광디스크와 대물렌즈의 충돌을 방지할 수 있도록 하는 광픽업의 대물렌즈 구동장치에 관한 것이다.The present invention relates to an optical pickup of an optical disk drive, and in particular, to improve the winding structure and yoke shape of the coil to reduce the overall size and to prevent collision between the optical disk and the objective lens rotating at high speed. An object lens driving apparatus for an optical pickup.
일반적으로, 광픽업의 대물렌즈 구동장치는, 제1도에 도시된 바와 같이, 광빔을 집속하는 대물렌즈(10)가 구비된 대물렌즈홀더(11)는 고정 홀더(12)에 고정되는 다수의 지지와이어(13)에 고정되어 탄력있게 지지되는 것으로, 이를 좀더 구체적으로 설명하면 다음과 같다.In general, the objective lens driving apparatus of the optical pickup, as shown in FIG. 1, the objective lens holder 11 having the objective lens 10 for focusing the light beam is fixed to the fixed holder 12 It is fixed to the support wire 13 to be elastically supported, which will be described in more detail as follows.
상기 대물렌즈홀더(11)의 소정위치에 통공된 구멍(11a) 내주면에 수평방향으로 포커스제어구동코일(14)이 권선됨과 아울러 상기 포커스제어구동코일(14) 내측면에 소정간격이 이격된 한 쌍의 트래킹제어코일(15)이 수직방향으로 권선되고, 상기 구동코일(14,15)의 내부 중앙으로 베이스(10A)에서 상방으로 돌설된 요크(16)의 선단부 양측으로 자석(17)이 부착된다.As long as the focus control driving coil 14 is wound around the inner circumferential surface of the hole 11a through the predetermined position of the objective lens holder 11 in a horizontal direction, and the predetermined distance is spaced apart from the inner surface of the focus control driving coil 14. A pair of tracking control coils 15 are wound in a vertical direction, and magnets 17 are attached to both ends of the yoke 16 protruding upward from the base 10A to the inner center of the drive coils 14 and 15. do.
상기와 같은 구성된 광픽업 구동장치는 광디스크상에 초점 또는 정해진 트랙을 벗어남에 따라 발생된 전류를 이용하여 포커스제어구동코일(14) 및 트랙킹제어코일(15)과 요크(16)에 부착된 자석(17)간의 전자유도작용(電磁誘導作用)으로 지지와이어(13)에 지지된 대물렌즈홀더(11)가 구동됨으로서 상기 대물렌즈홀더(11)에 구비된 대물렌즈(10)의 포커싱 및 트래킹 에러를 추종할 수 있게 된다.The optical pickup driving device configured as described above has a magnet attached to the focus control driving coil 14, the tracking control coil 15, and the yoke 16 by using a current generated by focusing or moving out of a predetermined track on the optical disk. 17) The objective lens holder 11 supported by the support wire 13 is driven by the electromagnetic induction action between the two, thereby reducing the focusing and tracking errors of the objective lens 10 provided in the objective lens holder 11. Can follow.
그러나, 상기와 같이 구성된 종래의 대물렌즈 구동장치는 대물렌즈 홀더의 몸체 중앙부에 자석 및 코일이 구성되어 포커싱 및 트랙킹 제어에 필요한 자기회로의 힘을 키우기 위해 구동코일을 보다 많이 권선시킴으로서 대물렌즈홀더의 크기가 대형화되는 문제점이 있었다.However, the conventional objective lens driving apparatus configured as described above has a magnet and a coil formed at the center of the body of the objective lens holder, thereby winding the driving coil more to increase the force of the magnetic circuit required for focusing and tracking control. There was a problem that the size is large.
이러한 종래의 문제점을 해결하기 위하여 본 발명의 출원인은 광픽업의 대물렌즈 구동장치와 그 제조방법(1995년 특허출원 제14801호(1995년 6월 15일))을 출원한바 있다. 본 발명의 출원인이 선출원한 광픽업의 대물렌즈 구동장치를 개략적으로 설명하면 다음과 같다.In order to solve such a conventional problem, the applicant of the present invention has applied for an objective lens driving apparatus for optical pickup and a manufacturing method thereof (Patent Application No. 14401 (1995, June 15, 1995)). Applicant of the present invention will be described in brief the objective lens driving device of the optical pickup previously filed.
상기에서와 같이 선출원된 광픽업의 대물렌즈 구동장치는, 제3도, 및 제4도에 도시된 바와 같이, 소정폭의 판체(110) 양측단을 절곡시킨 지지편(120)이 상호 대향되게 일체 연장되고, 상기 일측 지지편(120), 상단부에 고정된 연결편(130)으로 소정간격 이격되게 고정편(140)이 고정되는 요크 베이스(100)와, 상기 요크 베이스(100)의 연결편(130)에 고정되어 양측면 소정위치에 다수의 지지와이어(210)가 고정되는 고정 홀더(200)와, 상기 고정 홀더(200)의 지지와이어(210)에 끼움고정부재 상기 요크 베이스(100)의 지지편(120) 사이에서 탄력있게 지지되는 대물렌즈홀더(300)로 구성되는 것으로, 이를 좀더 구체적으로 설명하면 다음과 같다.As described above, the objective lens driving apparatus of the pre- filed optical pickup, as shown in Figs. 3 and 4, so that the support pieces 120, which bent both ends of the plate body 110 of a predetermined width, are opposed to each other. The yoke base 100 which is integrally extended and the fixing piece 140 is fixed to be spaced apart by a predetermined distance from the one side support piece 120 and the connecting piece 130 fixed to the upper end, and the connecting piece 130 of the yoke base 100. Fixed holder 200 is fixed to the plurality of support wires 210 is fixed to both sides at a predetermined position on the both sides, and the support piece of the fixing member 200 to the support wire 210 of the fixed holder 200 It is composed of an objective lens holder 300 that is elastically supported between the 120, as described in more detail as follows.
상기 대물렌즈홀더(300)는 대물렌즈(L)가 고정되도록 중앙부에 안착공(320)이 통공된 몸체(310) 양측 상, 하단에 상호 대향되게 소정길이 외향으로 가이드편(330)이 돌설된다.In the objective lens holder 300, the guide piece 330 protrudes outward from a predetermined length so as to face each other on the lower side and the lower side of the body 310 through which the mounting hole 320 is perforated so that the objective lens L is fixed. .
또한, 상기 요크 베이스(100)의 지지편(120) 상부 내측에 상호 대향되게 자석(M)이 소정의 접착수단에 의해 각각 고정된다.In addition, the magnets M are respectively fixed by a predetermined bonding means so as to face each other inside the upper side of the support piece 120 of the yoke base 100.
이와 같이 구성된 광픽업의 대물렌즈 구동장치의 조립과정을 설명하면 다음과 같다.The assembly process of the objective lens driving device of the optical pickup configured as described above is as follows.
먼저, 광축과 평행을 이루어 대물렌즈(L)의 Z방향으로 제어하도록 대물렌즈홀더(300)의 양측에 형성된 가이드편(330)사이의 수평방향으로 포커스제어코일(F)을 권선시킨 후, 상기 포커싱제어코일(F)에 의해 광축상으로 제어되는 상기 대물렌즈(L)를 광축과 수직을 이루어 Y방향으로 제어하도록 상기 대물렌즈홀더(300)의 양측에 돌설된 각 가이드편(330) 사이를 수직방향으로 트래킹제어코일(T)을 권선하게 된다.First, the focus control coil F is wound in a horizontal direction between guide pieces 330 formed on both sides of the objective lens holder 300 so as to be parallel to the optical axis and controlled in the Z direction of the objective lens L. Between each guide piece 330 protruding on both sides of the objective lens holder 300 to control the objective lens L, which is controlled on the optical axis by the focusing control coil F, in the Y direction perpendicular to the optical axis. The tracking control coil T is wound in the vertical direction.
상기와 같이 포커싱 및 트래킹제어코일(F,T)이 권선된 대물렌즈홀더(300)는 상기 연결편(120)에 의해 요크 베이스(100)의 지지편(120)과 소정간격 이격되게 고정된 고정편(130)에 상기 고정 홀더(200)의 중앙부를 고정한 상태에서 상기 대물렌즈홀더(300)는 상기 요크 베이스(100)의 지지편(120)사이에 위치되어 지지와이어(210)로 상기 고정 홀더(200)에 상호 탄력있게 고정됨으로서 상기 대물렌즈홀더(200)가 포커싱 및 트랙킹 보정방향으로 구동할 수 있게 된다.As described above, the objective lens holder 300 having the focusing and tracking control coils F and T wound thereon is fixed to be fixed to the support piece 120 of the yoke base 100 by a predetermined distance from the connecting piece 120. The objective lens holder 300 is positioned between the support pieces 120 of the yoke base 100 in a state where the center portion of the fixing holder 200 is fixed to the fixing holder 200. The objective lens holder 200 can be driven in the focusing and tracking correction direction by being firmly fixed to each other.
그러나, 상기와 같이 구성된 광픽업의 대물렌즈 구동장치에서 대물렌즈홀더는 포커싱제어코일이 권선된 후, 그 외부 양측에 수직방향으로 트래킹제어용구코일이 동일한 높이의 층으로 각각 권선됨으로서 부피가 커지게 되는 문제점이 있었다.However, in the objective lens driving apparatus of the optical pickup configured as described above, the objective lens holder is made to be bulky by winding the focusing control coils in the vertical direction on both sides thereof and winding the tracking control tool coils in the same height layer. There was a problem.
또한, 자석이 부착되는 요크베이스의 지지편 상부가 일자형으로 구성되어 자석을 부착하기 위한 별도로 지그가 필요하게 되어 과다한 조립공수 및 부품단가가 상승하게 될 뿐만 아니라 외부로부터 충격이나 전기회로의 오동작으로 대물렌즈가 고속으로 회전하는 광디스크에 접촉하게 되어 손상을 입게 되는 문제가 있었다.In addition, since the upper part of the support piece of the yoke base to which the magnet is attached is formed in a straight shape, a separate jig for attaching the magnet is required, which leads to excessive assembly labor and parts cost, as well as an external shock or malfunction of the electric circuit. There was a problem that the lens is damaged by contact with the optical disk rotating at high speed.
본 발명의 목적은 상기와 같은 종래의 문제점을 해소하기 위한 것으로, 특히 포커싱제어코일과 트래킹제어구동코일의 권선층을 상호 다르게 하여 부피를 소형화할 수 있도록 함과 아울러 대물렌즈와 광디스크의 접촉에 의한 손상을 방지할 수 있도록 하는 광픽업의 대물렌즈 구동장치를 제공하는데 있다.An object of the present invention is to solve the above-mentioned conventional problems, and in particular, the winding layers of the focusing control coil and the tracking control driving coil are different from each other so that the volume can be reduced, and the contact of the objective lens and the optical disk The present invention provides an objective lens driving device for optical pickup that can prevent damage.
또한, 본 발명의 다른 목적은 요크 베이스의 자석이 부착되는 면을 ㄷ저 형으로 구성하여 조립구조를 간소하게 함과 아울러 자기회로의 효율을 향상시킬 수 있게 하는 광픽업의 대물렌즈 구동장치를 제공하는데 있다.In addition, another object of the present invention is to provide an objective lens driving apparatus of the optical pickup that can make the yoke-base magnet is attached to the c-shaped type to simplify the assembly structure and improve the efficiency of the magnetic circuit. have.
이러한 본 발명 광픽업의 대물렌즈 구동장치는, 자석이 끼움고정 되도록 상기 요크 베이스의 지지편 상부 양측단을 상호 대향되게 내측으로 절곡시킨 끼움고정부재와, 상기 끼움고정부재에 고정된 자석간에 상기 고정 홀더의 지지와이어로 탄력있게 지지되는 몸체의 전후 양측부에 수평 방향으로 길게 내측으로 수평권취홈이 요입되는 대물렌즈홀더와, 상기 대물렌즈홀더의 상방 이동을 제한하도록 판상의 몸체 소정위치에 대물렌즈홀더에 부착된 대물렌즈가 노출되는 구멍이 통공되고, 상기 몸체 양측단에는 요크 베이스의 양측 외면에 면접촉 상태로 밀착되고 고정편이 절곡되고, 상기 고정편이 밀착되는 지지편의 외측면에 한 쌍의 고정홈을 요입하여 상기 고정편의 내측면에 상기 고정홈에 대응되게 내향으로 고정돌기가 돌설되는 충돌방지부재를 포함하여 구성됨을 특징으로 한다.The objective lens driving device of the optical pickup according to the present invention includes a fitting fixing member bent inwardly so that both ends of the upper side of the support piece of the yoke base are opposed to each other so that the magnet is fixed, and the magnet between the magnet fixed to the fitting fixing member. An objective lens holder in which a horizontal winding groove is recessed inwardly in a horizontal direction on both front and rear sides of the body elastically supported by the support wire of the holder, and an objective lens at a predetermined position on the plate body to limit upward movement of the objective lens holder. A hole through which the objective lens attached to the holder is exposed is provided, and both ends of the body are in close contact with both outer surfaces of the yoke base, and the fixing piece is bent, and the pair of fixing pieces are fixed to the outer surface of the support piece to which the fixing piece is in close contact. A collision preventing member in which a fixing protrusion protrudes inward to correspond to the fixing groove on the inner surface of the fixing piece by recessing the groove. Characterized by configured to include.
제1도는 종래 광픽업의 대물렌즈 구동장치를 보인 외부사시도.1 is an external perspective view showing an objective lens driving apparatus of a conventional optical pickup.
제2도는 본 출원인이 선출원한 대물렌즈 구동장치를 보인 외부사시도.2 is an external perspective view showing the objective lens driving device of the present applicant.
제3도는 일반적인 대물렌즈홀더의 외부를 보인 사시도.3 is a perspective view showing the outside of a general objective lens holder.
제4도는 본 발명이 적용된 대물렌즈 구동장치를 보인 외부사시도.4 is an external perspective view showing an objective lens driving apparatus to which the present invention is applied.
제5도는 본 발명이 적용된 대물렌즈 구동장치를 보인 분리사시도.5 is an exploded perspective view showing an objective lens driving device to which the present invention is applied.
제6도는 본 발명이 적용된 대물렌즈홀더부재의 권취상태를 보인 평단면도.6 is a plan sectional view showing a winding state of the objective lens holder member to which the present invention is applied.
제7도는 본 발명이 적용된 요크 베이스의 평면도.7 is a plan view of the yoke base to which the present invention is applied.
제8도는 본 발명이 적용된 충돌방지부재의 조립상태를 보인 일측단면도.Figure 8 is a side cross-sectional view showing an assembled state of the collision preventing member to which the present invention is applied.
제9도는 본 발명에 의한 대물렌즈 구동장치의 자기효율 비교도로서,9 is a magnetic efficiency comparison diagram of the objective lens driving apparatus according to the present invention.
제9(a)도는 끼움고정부재가 없는 상태에서의 자기분포를 보인 것이고,9 (a) shows the magnetic distribution in the absence of the fastening member,
제9(b)도는 끼움고정부재가 있는 상태에서의 자기분포를 보인 것이다.9 (b) shows the magnetic distribution in the state where the fitting member is present.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
100 : 요크베이스 200 : 고정 홀더100: yoke base 200: fixed holder
500 : 끼움고정부재 600 : 대물렌즈홀더부재500: fitting fixing member 600: objective lens holder member
620 : 수평권취홈 700 : 충돌방지부재620: horizontal winding groove 700: collision preventing member
720 : 구멍 730 : 고정편720: hole 730: fixing piece
740 : 고정돌기740: fixed protrusion
이하, 상기와 같이 구성된 본 발명 광픽업의 대물렌즈 구동장치의 기술적 사상에 따른 일 실시예를 들어 구성, 동작 및 작용효과를 첨부된 도면에 의거 상세히 설명하면 다음과 같다. 제4도는 본 발명이 적용된 대물렌즈 구동장치를 보인 외부사시도이고, 제5도는 본 발명이 적용된 대물렌즈 구동장치의 분리사시도이고, 제6도는 본 발명이 적용된 대물렌즈홀더의 권취상태를 보인 평단면도이고, 제7도은 본 발명이 적용된 요크 베이스의 평면도이고, 제8도는 본 발명이 적용된 충돌방지부재의 조립상태를 보인 일측 단면도이고, 제9도는 본 발병에 의한 대물렌즈 구동장치의 자기 효율 비교도이다.Hereinafter, with reference to the accompanying drawings, the configuration, operation and operation effects for an embodiment according to the technical idea of the objective lens driving apparatus of the present invention configured as described above are as follows. 4 is an external perspective view showing an objective lens driving device to which the present invention is applied, and FIG. 5 is an exploded perspective view of the objective lens driving device to which the present invention is applied, and FIG. 6 is a cross sectional view showing a winding state of the objective lens holder to which the present invention is applied. 7 is a plan view of the yoke base to which the present invention is applied, and FIG. 8 is a sectional view of one side showing the assembled state of the collision preventing member to which the present invention is applied, and FIG. 9 is a magnetic efficiency comparison diagram of the objective lens driving device according to the present invention. to be.
본 발명이 적용되는 광픽업의 대물렌즈 구동장치는 소정 폭의 판체(110)양측단에 상방으로 절곡된 지지편(120) 일측 상단부에 고정된 연결편(130)으로 소정간격 이격되게 고정편(140)이 고정되는 요크 베이스(100)와, 상기 요크 베이스(100)의 고정편(130)에 고정되어 양측면 소정위치에 다수의 지지와이어(210)가 고정되는 고정 홀더(200)로 구성된다.The objective lens driving apparatus of the optical pickup to which the present invention is applied is fixed to the fixing piece 140 so as to be spaced apart by a predetermined distance from the connection piece 130 fixed to the upper end of one side of the support piece 120 bent upwards on both ends of the plate body 110 of a predetermined width. ) Is fixed to the yoke base 100 is fixed, and the fixing holder 200 is fixed to the fixing piece 130 of the yoke base 100, a plurality of support wires 210 are fixed at both sides of the predetermined position.
이러한 광픽업의 대물렌즈 구동장치에 있어 본 발명은 삽입에 끼움으로 자석(M)이 고정되도록 상기 요크 베이스(100)의 지지편(120) 상부 양측단을 상호 대향되게 내측으로 절곡시킨 끼움고정부재(500)와, 상기 끼움고정부재(500)에 고정된 자석(M)사이에 상기 고정 홀더(200)의 지지와이어(210)에 탄력있게 지지된 몸체(610)의 전후양측부에 수평방향으로 길게 소정폭의 수평권취홈(620)이 요입되는 대물렌즈홀더부재(600)와, 상기 대물렌즈홀더부재(600)의 상방이동을 제한하도록 판상의 몸체(710) 소정위치에 대물렌즈홀더부재(600)에 안착된 대물렌즈(L)가 노출되는 구멍(720)이 통공되고, 상기 몸체(710)양측단에 요크 베이스(100)의 양측 외면에 면접촉 상태로 밀착되게 고정편(730)이 하향으로 절곡되고, 상기 고정편(730)이 밀착되는 지지편(120)의 외측면에 한 쌍의 고정홈(121)을 요입하여 상기 고정편(730)의 내측면에 상기 고정홈(121)에 대응되게 내항으로 고정돌기(740)가 돌설되는 충돌방지부재(700)로 구성된다.In the objective lens driving apparatus of the optical pickup according to the present invention, the fitting fixing member bent inward so that both ends of the upper side of the support piece 120 of the yoke base 100 are fixed to each other so that the magnet M is fixed by insertion. Between the 500 and the magnet (M) fixed to the fitting member 500 in the horizontal direction on the front and rear sides of the body 610 elastically supported on the support wire 210 of the fixed holder 200. The objective lens holder member 600 into which the horizontal winding groove 620 of a predetermined width is recessed and the objective lens holder member at a predetermined position of the plate-shaped body 710 so as to restrict the upward movement of the objective lens holder member 600. A hole 720 through which the objective lens L seated on 600 is exposed, and the fixing piece 730 is in close contact with both outer surfaces of the yoke base 100 at both ends of the body 710. Bent downward, a pair of fixing to the outer surface of the support piece 120 is in close contact with the fixing piece 730 Concave groove 121 is composed of an anti-collision member 700 in which the fixing protrusion 740 protrudes into the inner port corresponding to the fixing groove 121 on the inner surface of the fixing piece 730.
이와 같이 구성된 본 발명의 조립상태를 설명하면 다음과 같다.Referring to the assembled state of the present invention configured as described above are as follows.
먼저, 수평권취홈(620)에 포커싱제어코일(F)을 권선한 후, 대물렌즈홀더부재(600) 양측부에 포커싱제어코일(F) 상부로 겹쳐지게 트래킹제어코일(T)을 각각 권선한다.First, the focusing control coil F is wound around the horizontal winding groove 620, and then the tracking control coil T is wound on both sides of the objective lens holder member 600 so as to overlap the focusing control coil F. .
또한, 상기 자석(M)은 요크 베이스(100)의 지지편(120) 상부 양측단에 각각 상호 대향되게 절곡된 끼움고정부재(500)에 삽입하여 간단하게 끼움 고정됨과 아울러, 제9도에 도시된 바와 같이, 자기효율이 높아지게 된다.In addition, the magnet (M) is simply inserted into the fixing member 500, which is bent to face each other on the upper sides of the support piece 120 of the yoke base 100, and is simply fitted and fixed, as shown in FIG. As can be seen, the magnetic efficiency is increased.
한편, 상기 충돌방지부재(700)는 면접촉 상태로 결합되도록 요크 베이스(100)의 지지편(120) 양측면에 요입된 고정홈(121)으로 상기 몸체(710) 양측에서 하향으로 절곡된 고정편(730)의 내측면 소정위치에 돌설된 고정돌기(740)를 삽입하여 상호 고정한다.On the other hand, the anti-collision member 700 is a fixing piece bent downward from both sides of the body 710 into the fixing groove 121 recessed in both sides of the support piece 120 of the yoke base 100 to be coupled in a surface contact state The fixing protrusions 740 protruding at predetermined positions on the inner side of the surface 730 are inserted to fix each other.
따라서, 상기 요크 베이스(100)에 충돌방지부재(700)가 고정된 상태에서 대물렌즈(L)와 광디스크가 상호 근접하게 작동하게 되면 상기 충돌방지부재(700)의 저면에 대물렌즈홀더부재(600)의 상면이 걸림으로써 대물렌즈(L)가 디스크에 충돌하는 것을 방지할 수 있게 된다.Therefore, when the objective lens L and the optical disk operate in close proximity to each other in a state where the collision preventing member 700 is fixed to the yoke base 100, the objective lens holder member 600 is disposed on the bottom surface of the collision preventing member 700. ), The objective surface L can be prevented from colliding with the disk.
이상에서 살펴본 바와 같이, 본 발명 광픽업의 대물렌즈 구동장치는, 특히 포커싱제어코일이 권선되는 층과 상호 다르게 트랙킹 제어용 구동코일을 이중으로 겹치도록 권선하여 광픽업을 소형할 수 있을 뿐만 아니라 요크 베이스의 자석이 부착되는 면을 ㄷ자 형으로 구성하여 자기회로의 효율을 향상시킬 수 있게 하며, 요크 베이스에 충돌방지부재를 부착하여 대물렌즈가 디스크에 충돌하는 것을 방지함으로서 아울러 기기의 신뢰성을 향상시킬 수 있는 효과가 있게 되는 것이다.As described above, the objective lens driving device of the optical pickup according to the present invention, in particular, can not only make the optical pickup smaller by winding the driving control coil for overlapping the tracking control differently from the layer in which the focusing control coil is wound, but also the yoke base. The magnet is attached to the U-shaped surface to improve the efficiency of the magnetic circuit.A collision prevention member is attached to the yoke base to prevent the objective lens from colliding with the disc and to improve the reliability of the device. It will be effective.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960007017A KR100211922B1 (en) | 1996-03-15 | 1996-03-15 | Object lens driving device of optical pickup |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960007017A KR100211922B1 (en) | 1996-03-15 | 1996-03-15 | Object lens driving device of optical pickup |
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| Publication Number | Publication Date |
|---|---|
| KR970067154A KR970067154A (en) | 1997-10-13 |
| KR100211922B1 true KR100211922B1 (en) | 1999-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960007017A Expired - Fee Related KR100211922B1 (en) | 1996-03-15 | 1996-03-15 | Object lens driving device of optical pickup |
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| KR100436719B1 (en) * | 2001-07-24 | 2004-06-22 | 삼성전기주식회사 | Optical pick-up |
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