KR970002938Y1 - Optical pick-up - Google Patents
Optical pick-up Download PDFInfo
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- KR970002938Y1 KR970002938Y1 KR2019910011085U KR910011085U KR970002938Y1 KR 970002938 Y1 KR970002938 Y1 KR 970002938Y1 KR 2019910011085 U KR2019910011085 U KR 2019910011085U KR 910011085 U KR910011085 U KR 910011085U KR 970002938 Y1 KR970002938 Y1 KR 970002938Y1
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- South Korea
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- objective lens
- pickup
- optical pickup
- drive unit
- horizontal
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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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
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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
- G11B7/0932—Details of sprung supports
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
내용없음.None.
Description
제1도는 본 고안에 따른 대물렌즈 구동부 지지장치를 나타낸 개략적 사시도.1 is a schematic perspective view showing an objective lens driving unit support device according to the present invention.
제2도는 제1도의 궤도맞춤 이동상태를 도시하며,2 shows the orbital movement state of FIG. 1,
제3도는 초점맞춤이동을 도시한다.3 shows the focusing movement.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
3 : 대물렌즈 4 : 구동부 본체3: objective lens 4: driving unit body
5,6 : 탄성부재5,6 elastic member
본 고안은 광기록 및/또는 재생기구에 설치되는 광픽업에 있어서의 대물렌즈 구동부 지지장치에 관한 것으로서, 특히 수평·수직방향의 탄성을 동시에 가지는 탄성부재를 제공함으로서 그 조립이 간단하고 대물렌즈의 평형상태를 추가장치없이도 유지할 수 있는 그 구조가 개선된 대물렌즈 구동부 지지장치에 관한 것이다.The present invention relates to an objective lens driving unit support device for optical pickup installed in an optical recording and / or reproducing mechanism, and in particular, by providing an elastic member having elasticity in horizontal and vertical directions at the same time, the assembly thereof is simple and The present invention relates to an improved objective lens driver supporting apparatus capable of maintaining an equilibrium state without additional devices.
예컨대 CDP(Compact Disc Player), LDP(Laser Disc Player)등 광기록 및/또는 재생매체를 이용한 각 플레이어에는 레이저 등의 광빔을 주사하고 그 매체로부터 반사되는 광빕을 검출하는 광픽업이 설치되어 있다.For example, each player using optical recording and / or reproducing media such as CDP (Compact Disc Player) and LDP (Laser Disc Player) is provided with an optical pickup for scanning a light beam such as a laser and detecting an optical beam reflected from the medium.
이와 같은 광픽업에 있어서는 기록 또는 재생시와 동시에 그 반사되는 광빔으로부터 대물렌즈의 수평·수직위치를 검지하여 소정의 전류신호를 대물렌즈 구동부에 인가함으로써 그 대물렌즈의 수평·수직위치를 콘트롤하는 서어보 제어가 행해지고 있다. 이때 대물렌즈를 통해 접속되어진 광빔이 디스크면에 수직으로 조사되어 정확하게 정보를 기록 및 재생을 수행하도록 대물렌즈의 이동을 도울 수 있는 대물렌즈 지지장치가 요구된다.In such optical pickup, a servo which controls the horizontal and vertical positions of the objective lens by detecting the horizontal and vertical positions of the objective lens from the reflected light beam and applying a predetermined current signal to the objective lens driver at the same time as recording or reproduction. Control is being performed. In this case, there is a need for an objective lens support apparatus capable of assisting the movement of an objective lens so that a light beam connected through the objective lens is irradiated perpendicularly to the disk surface to accurately record and reproduce information.
이에 관하여는 대한민국 공개실용신안공보 88-13250호에 개신된 바와같이 대물렌즈 구동부의 수평·수직운동간의 간섭현상이 방지되는 장점도 있으나 구동부의 수평·수직운동을 지지하는 탄성부재들이 그 기능이 서로 달라 따로 설치해야 할 뿐 아니라 대물렌즈 구동부가 수직방향으로 지지하는 지지부재위에 설치됨으로써 픽업전체의 부피가 커지는 단점과 대물렌즈 구동부의 무게중심이 상부쪽에 존재함으로서 불안정한 계가 형성되는 단점이 있다. 또한 일본공개특허 소59-68834호에 개신된 바와 같은 판스프링 타입과, 일본공개특허 소57-195339호에 개시된 바와 같은 축타입의 경우가 있는 바, 상기 판스프링 타입은 대물렌즈가 렌즈홀더에 편중되어 설치되므로 이의 평형을 위해서 별도의 평형추를 마련하여서 렌즈홀더의 평형상태를 유지하였으며, 상당한 길이의 판스프링이 다수 사용되기 때문에 작업공수가 많으며 픽업전체 크기가 커지는 문제점이 발생된다. 상기 축타입은 역전압을 인가함으로써 몸체의 평형상태를 유지하므로 전력소비가 많은 단점이 있다.In this regard, as disclosed in Korean Utility Model Publication No. 88-13250, there is an advantage in that interference between the horizontal and vertical motions of the objective lens driver is prevented. However, the elastic members supporting the horizontal and vertical motions of the driving part have different functions. Since the objective lens driving unit is installed on the support member vertically supported, the volume of the entire pickup is increased, and the center of gravity of the objective lens driving unit is located on the upper side, thereby forming an unstable system. In addition, there are cases of the leaf spring type as disclosed in Japanese Patent Laid-Open No. 59-68834 and the shaft type as disclosed in Japanese Laid-Open Patent No. 57-195339. The leaf spring type has an objective lens mounted on a lens holder. Since the installation is biased to maintain the equilibrium state of the lens holder by providing a separate counterweight for the balance of this, there is a problem that a lot of workmanship and the overall size of the pickup increases because a large number of leaf springs are used. The shaft type has a disadvantage in that power consumption is high because the body is maintained in an equilibrium state by applying a reverse voltage.
본 고안은 상기한 단점들을 개선하기 위한 것으로서 하나의 탄성부재로 수평방향과 수직방향으로의 탄성을 동시에 갖도록 그 구조가 개선된 대물렌즈 구동부 지지장치를 제공함에 그 목적이 있다.An object of the present invention is to provide an objective lens driving unit supporting device whose structure is improved to simultaneously have elasticity in a horizontal direction and a vertical direction with one elastic member.
상기 목적을 달성하기 위하여 본 고안은 자계중에서 수평·수직방향으로 움직이는 구동코일이 각각 감긴 구동부 본체에 대물렌즈를 탑재하여 되는 광픽업의 대물렌즈 구동부 지지장치에 있어서, 상기 구동부 본체의 서로 대향되는 양측면에 그 탄성부재 양단이 각각 힌지고정되는 동시에 중간부위가 픽업 베이스에 고정되며, 그 양단과 중간부 사이에 좌우대칭으로 절곡된 제1힌지부와 제2힌지부를 가지는 탄성부재를 구비하여 된 것을 특징으로 한다.In order to achieve the above object, the present invention provides an objective lens driving unit supporting device of an optical pickup, in which an objective lens is mounted on a driving unit body in which driving coils moving in a horizontal and vertical direction in a magnetic field are respectively wound, wherein both side surfaces of the driving unit body face each other. And an elastic member having a first hinge portion and a second hinge portion, each of which is fixed at both ends of the elastic member and at the same time the intermediate portion is fixed to the pick-up base and symmetrically bent between the both ends and the intermediate portion. It is done.
이하 첨부된 도면을 참조하면서 본 고안에 따른 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제1도에는 본 고안에 따른 대물렌즈 구동부 지지장치가 개략적으로 발췌도시되어 있다. 이 대물렌즈 구동부 지지장치는 대물렌즈(3)가 그 중앙부위에 장착되는 구동부 본체(4)와, 그 판상의 몸체의 양단부가 상기 구동부 본체(4)의 서로 대향되는 양측면의 가장자리에 힌지고정되는 접합부(5a)(6a)가 형성되며 그 몸체의 중간부위가 픽업베이스(10)에 고정되는 제1,2탄성부재(5)(6)를 갖춘다. 이때 상기 제1, 2탄성부재(5)(6)는 베이스(10)와의 고정부위에서 절곡하여 제2힌지부(5c)(6c)가 형성되며 형성되어 있다. 그리고 이 제2힌지부(5c)(6c)와 접합부(5a)(6a)와의 사이에서 한 번 더 절곡하여 제1힌지부(5b)(6b)가 형성되어 있다. 그리고 상기 구동부 본체(4)의 측면에는 통상적인 것과 마찬가지로 영구자석(도시생략)이 부착되어 있어서, 구동부 본체(4)에 감겨지는 구동코일(도시생략)과의 상호 자기회로를 형성하여서 상기 구동부 본체(4)가 소정방향, 즉 디스크에 대한 대물렌즈의 궤도조절과 초점조절을 위한 좌우 상하방향으로 복합적으로 위치이동될 수 있게 된다.Figure 1 is a schematic extraction of the objective lens driving unit support device according to the present invention. The objective lens driver supporting apparatus includes a driving unit body 4 on which the objective lens 3 is mounted at the center portion thereof, and both ends of the plate-shaped body are hinged to the edges of both sides of the driving unit body 4 facing each other. Bonding portions 5a and 6a are formed and the first and second elastic members 5 and 6 are fixed to the intermediate portion of the body to the pickup base 10. In this case, the first and second elastic members 5 and 6 are bent at a fixed portion with the base 10 to form second hinge portions 5c and 6c. The first hinge portions 5b and 6b are bent once more between the second hinge portions 5c and 6c and the joined portions 5a and 6a. In addition, a permanent magnet (not shown) is attached to the side of the drive unit main body 4 as usual, and forms a mutual magnetic circuit with a drive coil (not shown) wound around the drive unit main body 4 to form a mutual magnetic circuit. (4) can be shifted in a predetermined direction, that is, in the left and right up and down directions for adjusting orbiting and focusing the objective lens with respect to the disc.
이와 같은 구조의 대물렌즈 구동부 지지장치에 있어서, 상기 접합부(5a)(6a) 및 제1힌지부(5b)(6b)의 픽어베이스(10)에 대한 상대높이는 각각 사실상 같은 높이에 위치함이 바람직하다.In the objective lens driver supporting apparatus having such a structure, it is preferable that the relative heights of the junction portions 5a, 6a and the first hinge portions 5b, 6b with respect to the pick base 10 are each substantially at the same height. Do.
이어서 본 고안의 작동상태를 상세히 설명한다. 먼저 레이저 픽업이 동작중일 때에는 구동부 본체에 감겨지는 구동코일에 전류가 인가되어 상기 구동부 본체(4)가 어느 일정위치에 위치고정되게 된다. 그리고 디스크(도시생략)가 회전되는 도중 외부충격 또는 진동등에 의해 에러가 발생되면 즉, 대물렌즈(3)의 초점의 어긋남과 궤도의 어긋남이 발생되게 되면 상기 구동코일에 에러신호전류가 인가되게 된다. 예를들어 광디스크의 위치가 회전도중에 변화되게 되면 구동부 본체(4)가 상하 또는 좌우로 미세한 이동을 하게 된다.Next, the operating state of the present invention will be described in detail. First, when the laser pickup is in operation, a current is applied to the driving coil wound around the driving body so that the driving body 4 is fixed at a predetermined position. If an error occurs due to an external shock or vibration while the disk (not shown) is rotated, that is, a shift of focus and a track of the objective lens 3 occur, an error signal current is applied to the driving coil. . For example, when the position of the optical disk is changed during the rotation, the drive body 4 moves finely up and down or left and right.
먼저 궤도맞춤이동이 요구될 때에는 영구자석(도시생략)과 구동코일과의 자기회로에 의해 수평방향 즉, 제2도에 도시된 바와 같이 X방향으로의 힘이 미치게 된다. 이때 상기 제1, 2탄성부재(5)(6)의 접합부(5a)(6a)와 제1, 2힌지부(5b)(6b), (5c)(6c)의 힌지작용에 의하여 Y방향으로의 위치변동은 이루어지지 않은채 궤도맞춤이 원만히 수행할 수 있게 된다.First, when an orbital movement is required, a force in the X direction is exerted by the magnetic circuit between the permanent magnet (not shown) and the driving coil, as shown in FIG. At this time, the joints 5a and 6a of the first and second elastic members 5 and 6 and the first and second hinges 5b and 6b and 5c and 6c are hinged in the Y direction. The positional alignment of the trajectory can be performed smoothly without any change of position.
다음으로 초점맞춤이동이 있어야 할 경우에는 구동코일(7)에 전류가 인가되어 영구자석(도시생략)과의 자기 회로에 의해 수직방향 즉, 제3도에 도시된 바와 같이 Z방향으로 힘이 미치게 된다. 이때 상기 제1, 2탄성부재의 접합부(5a)(6a)와 제1, 2힌지부(5b)(6b), (5c)(6c)의 힌지작용에 의하여 각 탄성부재가 미세하게 하강 또는 상승하게 되고 이에 따라 구동부 본체(4)가 상하방향으로 이동되게 되는데 X,Y방향으로의 이동은 전혀 일어나지 않도록 지지되며 구동코일의 작동에 따른 초점맞춤이동이 원만이 수행될 수 있다.Next, when the focus movement is to be performed, a current is applied to the driving coil 7 so that the force is exerted in the vertical direction, that is, Z direction as shown in FIG. 3 by a magnetic circuit with a permanent magnet (not shown). do. At this time, each elastic member is finely lowered or raised due to the hinge action of the junction portions 5a and 6a of the first and second elastic members and the first and second hinge portions 5b and 6b and 5c and 6c. As a result, the driving unit body 4 is moved in the vertical direction, and the movement in the X and Y directions is supported so that no movement occurs at all, and only the circle can be moved according to the operation of the driving coil.
한편 경우에 따라서 궤도맞춤이동과 초점맞춤이동이 동시에 일어날 수도 있는 바, 이때에는 제2도 및 제3도에 도시된 바와 같은 움직임이 복합적으로 일어나게 된다. 이러한 구동부 본체(4)의 상하 좌우방향으로의 이동은 대물렌즈(3)가 그 중앙에 위치되어 있으므로 별도의 장치(예를들어 평형추)없이도 평형이 유지되면서 이동이 가능한 것이다.Meanwhile, in some cases, the orbital movement and the focusing movement may occur simultaneously. In this case, the movements as shown in FIGS. 2 and 3 may be combined. Since the objective lens 3 is positioned at the center of the driving unit body 4 in the vertical direction, the movable body 4 can be moved while maintaining the equilibrium even without a separate device (for example, a counterweight).
이상과 같은 본 고안에 따른 대물렌즈 구동부 지지장치는 대물렌즈 구동부(4)의 평형된 상태를 유지하기 위하여 별도의 평형추를 필요로 하지 않으며, 대물렌즈 구동부의 무게중심을 종래보다 낮춤으로써 보다 안정한 계를 형성할 수 있으며, 하나의 탄성부재로 수평 및 수직방향으로의 지지를 가능하게 함으로써 픽업 전체의 부피를 줄일 수 있을뿐만 아니라 조립공수를 대폭 저감할 수 있으므로 본 고안은 제작이 쉽고 제조원가가 절감이 되는 효과적인 고안인 것이다.The objective lens driver supporting apparatus according to the present invention as described above does not need a separate counterweight to maintain the balanced state of the objective lens driver 4, and is more stable by lowering the center of gravity of the objective lens driver than before. The system can be formed, and by supporting one horizontal and vertical direction with one elastic member, not only can reduce the overall volume of the pickup, but also significantly reduce the number of assembly operations. This is an effective design.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910011085U KR970002938Y1 (en) | 1991-07-16 | 1991-07-16 | Optical pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910011085U KR970002938Y1 (en) | 1991-07-16 | 1991-07-16 | Optical pick-up |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930003369U KR930003369U (en) | 1993-02-26 |
| KR970002938Y1 true KR970002938Y1 (en) | 1997-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910011085U Expired - Fee Related KR970002938Y1 (en) | 1991-07-16 | 1991-07-16 | Optical pick-up |
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| Country | Link |
|---|---|
| KR (1) | KR970002938Y1 (en) |
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1991
- 1991-07-16 KR KR2019910011085U patent/KR970002938Y1/en not_active Expired - Fee Related
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| KR930003369U (en) | 1993-02-26 |
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