KR960009802Y1 - Voice coil motor for optical disc drive - Google Patents

Voice coil motor for optical disc drive Download PDF

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Publication number
KR960009802Y1
KR960009802Y1 KR2019900013523U KR900013523U KR960009802Y1 KR 960009802 Y1 KR960009802 Y1 KR 960009802Y1 KR 2019900013523 U KR2019900013523 U KR 2019900013523U KR 900013523 U KR900013523 U KR 900013523U KR 960009802 Y1 KR960009802 Y1 KR 960009802Y1
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Prior art keywords
coil
voice coil
head
optical disc
driving
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KR2019900013523U
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Korean (ko)
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KR920005167U (en
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박병호
연철성
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삼성전자 주식회사
정용문
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12—Machines characterised by the bobbins for supporting the windings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Control Of Linear Motors (AREA)

Abstract

내용 없음.No content.

Description

광디스크구동용 보이스코일모터Voice coil motor for optical disc drive

제1도(a)는 종래 광디스크구동용 보이스코일모터의 정면도.Figure 1 (a) is a front view of a conventional voice coil motor for optical disk drive.

제1도(b)는 제1도(a)에 도시된 광디스크구동용 보이스코일모터의 단면도.FIG. 1B is a cross-sectional view of the voice disk motor for driving an optical disc shown in FIG.

제2도(a)는 종래 또다른 광디스크구동용 보이스코일모터의 정면도.Figure 2 (a) is a front view of another conventional voice coil motor for optical disk drive.

제2도(b)는 제2도(a)에 도시된 광디스크구동용 보이스코일모터의 단면도.FIG. 2B is a cross-sectional view of the voice disk motor for driving an optical disc shown in FIG.

제3도(a)는 본고안의 일부 단면도.Figure 3 (a) is a partial cross-sectional view of the present draft.

제3도(b)는 제3도(a)에 도시된 광디스크구동용 보이스코일모터의 C-C선 단면도.FIG. 3B is a cross-sectional view taken along the line C-C of the voice coil motor for driving an optical disc shown in FIG.

제4도(a)는 본고안의 장착 상태도.4 (a) is a mounting state of the present article.

제4도(b)는 제 4도(a)에 도시된 광디스크구동용 보이스코일모터의 단면도이다.FIG. 4B is a cross-sectional view of the voice coil motor for driving an optical disc shown in FIG. 4A.

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

1 : 보빈 2, 25 : 속도감지용 코일1: bobbin 2, 25: speed sensing coil

3, 26 : 구동용 코일 4 : 디스크헤드3, 26: driving coil 4: disk head

6 : 가이드레일 7, 27 : 영구자석6: guide rail 7, 27: permanent magnet

8 : 공극 9, 21 : 대물렌즈8: void 9, 21: objective lens

22 : 실행기 23 : 선형자22: Launcher 23: Linear ruler

24 : 보이스코일모터 28 : 광원24: voice coil motor 28: light source

29 : 수광부 d : 공극길이29: light receiving part d: void length

본고안은 광디스크구동용 보이스코일모터에 관한 것으로, 특히 디스크헤드의 구동기능과 디스크헤드의 속도감지기능을 겸비히다록 된 광디스크구동용 보이스코일모터에 관한 것이다.The present invention relates to an optical disc drive voice coil motor, and more particularly, to an optical disc drive voice coil motor having both a disc head drive function and a disc head speed sensing function.

컴퓨터 기억장치는 데이터를 읽고 쓰기 위해서, 헤드를 랜덤 악세싱(Random Accessing)시키는데, 이러한 헤드구동을 위한 장치로서 보이스코일모터 (VCM : Voice Coil Motor)가 일반적으로 사용되어지고 있다.Computer memory devices randomly access the heads to read and write data, and voice coil motors (VCMs) are generally used as devices for driving the heads.

또한, 정교한 위치제어를 위해 별도의 속도감지나 위치감지센서장치가 필요하게 된다.In addition, a separate speed sensor or position sensor device is required for precise position control.

즉, 광디스크 구동장치(ODD : Optical Disk Drive)는 대물렌즈(21)를 통하여 주사되는 광으로 미디어(Media)에서 데이터를 읽고 쓰기 위해, 대물렌즈(21)를 미세조정하는 트랙킹(Tracking)과 포커싱(Focusing)서보가 있고, 대물렌즈(21)와 실행기(Actuator,22) 그리고 전체 광로를 포함하고 있는 헤드전체를 구동하는 조동(Course)시크(Seek)계가 있다.That is, an optical disk drive (ODD) is tracking and focusing to fine-tune the objective lens 21 in order to read and write data from the media with the light scanned through the objective lens 21. There is a (Focusing) servo, and there is a coarse seek system that drives the entire head including the objective lens 21, the actuator 22, and the entire optical path.

이 조동시크계는 보이스코일모터로 행해지고 있는데 정확한 위치제어를 위해서는 헤드위치를 감지하는 센서가 필요하게 된다.This coarse seek system is performed with a voice coil motor. For accurate position control, a sensor for detecting the head position is required.

제1도(a),(b)와 제 2도(a),(b)에 도시된 바와같이 종래는 헤드(4)의 구동과 위치감지를 별도의 장치를 설치하여 수행하여 왔다. 즉, 제1도에서 모터의 원리에 따라 코일이 가동되는 구동용 보이스콩리모터(24)는 가이드레일(6)상에 있는 헤드(4)를 구동시키면서 속도감지용 코일(25)에 의해 발전기의 원리에 따라 코일의 속도에 비례하는 전압이 발생되어 헤드(4)의 속도를 감지하게 된다.As shown in Figs. 1 (a), (b) and 2 (a) and (b), the driving and position detection of the head 4 has been conventionally performed by installing separate devices. That is, the driving voice bean motor 24 in which the coil is operated in accordance with the principle of the motor in FIG. 1 is driven by the speed sensing coil 25 while driving the head 4 on the guide rail 6. As a result, a voltage proportional to the speed of the coil is generated to detect the speed of the head 4.

제1도의 문제는 한쪽은 속도감지용으로 사용하게 되므로, 충분한 추력을 얻을 수 없을 뿐만 아니라 헤드(4)의 운동이 불안정하게 되는 것이다.The problem of FIG. 1 is that one side is used for speed sensing, so that not enough thrust can be obtained and the movement of the head 4 becomes unstable.

제2도에서, 양편에 배치된 구동용 보이스코일모터에 의해 헤드를 구동하면서 그 헤드의 위치감지는 일정한 간격으로 눈금이 새겨졌으며 헤드에 부착된 선형자(Linear Scale, 23)와 이것의 양편에 각각 배치되었으며 고정부에 고정된 광원(LED, 28) 및 수광부(PD : Photo Detector, 29)에 의해 이들사이의 상대범위를 감지하므로써 이루어진다.In FIG. 2, the head position is sensed at regular intervals while the head is driven by the driving voice coil motors disposed on both sides, and the linear scale 23 attached to the head and both sides thereof are attached. They are arranged by detecting the relative ranges between them by the light source (LED) 28 and the light receiving unit (PD: Photo Detector) 29 which are disposed and fixed to the fixed part.

제2도에 도시된 광디스크구동용 보이스코일모터의 문제는 헤드운동의 안정화는 이루어졌으나 선형자 어셈블리와 보조회로가 필요하게 되어 추가비용이 발생된다는 데에 있다.The problem of the optical disk drive voice coil motor shown in FIG. 2 is that the head motion is stabilized, but an additional cost is generated because a linear assembly and an auxiliary circuit are required.

이에 본고안은 상기와 같은 문제점들을 해결하기 위해 이루어진 것으로, 보이스코일모터에 속도감지용 코일을 구동용 코일과 함께 별도의 층으로 권선(Widing)시켜 헤드의 위치제어를 위해 구동과 감지를 하나의 모터로 실현하도록 된 광디스크구동용 보이스코일모터를 제공함에 그 목적이 있다.In order to solve the problems described above, the present proposal is made by winding a speed sensing coil in a separate layer together with a driving coil in a voice coil motor to drive and sense a motor for position control of a head. The object of the present invention is to provide a voice coil motor for driving an optical disc.

이하, 예시된 도면에 의거 본고안의 구성 및 작용효과를 상세히 설명한다.Hereinafter, the construction and the effect of the present invention based on the illustrated drawings will be described in detail.

본고안은 광디스크구동용 보이스코일모터에 있어서, 보빈(1)에 속도감지용 코일(2)과 구동용 코일(3)이 함께 권선되므로써, 디스크헤드(4)의 구동기능과 속도감지기능을 겸비하도록 된 광디스크구동용 보이스코일모터이다.In this proposal, in the voice coil motor for driving an optical disk, the speed sensing coil 2 and the driving coil 3 are wound together on the bobbin 1 so that the disk head 4 has both a driving function and a speed sensing function. Voice coil motor for optical disc drive.

본고안은 제3도에 도시된 바와같이 코일이 2중으로 구너선되며, 죄표에서 X방향은 코일의 운동방향이고, 운동범위는 자석(Magnet)길이 이내이며, Z방향은 자력선의 방향이다.In this paper, as shown in FIG. 3, the coil is double-curved, the X direction is the direction of movement of the coil, the range of motion is within the magnet length, and the Z direction is the direction of the magnetic lines.

따라서, X방향으로의 운동을 얻기 위해서는 공극내에서 y방향으로 전류가 흘러야 하므로 코일의 감는 방향은 y방향으로 된다. 구동용 코일(3)과 속도감지용 코일(2)은 하나의 보빈(1)에 층을 달리하여 권선하게 된다.Therefore, in order to obtain the movement in the X direction, the current must flow in the y direction within the void, so that the winding direction of the coil becomes the y direction. The driving coil 3 and the speed sensing coil 2 are wound by different layers on one bobbin 1.

구동용 코일(3)의 용도는 전류를 흘려서 구동하기 위한 것이고, 반면에 속도감지용 코일(2)은 구동되는 헤드의 속도를 감지하기 위한 것이다. 따라서, 구동용 코일(3)의 양단에는 전류구동회로를 작동시켜 원하는 추력을내도록 하고, 이렇게 해서 운동하는 헤드의 속도를 속도감지용 코일(2)의 양단전압을 측정하여 예측하게 된다.The purpose of the driving coil 3 is to drive the current while the speed sensing coil 2 is for sensing the speed of the head being driven. Therefore, a current drive circuit is operated at both ends of the driving coil 3 to produce a desired thrust, and thus the speed of the moving head is estimated by measuring the voltage at both ends of the speed detecting coil 2.

또한, 본고안에 따른 광디스크구동용 보이스코일모터는 기존의 보이스코일모터에 비해 속도감지용 코일(2)을 추가하므로써 공극길이(d)가 길어지게 되는데, 속도감지용 코일(2)은 구동용과 달리 코일의 권선수가 적어도 되므로 그 영향은 크지 않게 된다.In addition, the voice coil motor for optical disc driving according to the present invention has a longer air gap length (d) by adding a speed sensing coil (2) than the conventional voice coil motor. Since the number of turns is minimal, the effect is not large.

본고안을 헤드에 장착했을 때의 상태로는 제4도에 도시된 바와같이, 양측을 동시 구동하므로 헤드는 가이드레일(6)상을 안정되게 운동할 수 있게 되며, 제 2도에서와 같은 또다른 센서가 필요없게 된다.As shown in FIG. 4, the head can move stably on the guide rail 6, as shown in FIG. No other sensor is needed.

한편 구동용 코일은 모터의 원리에 의해 전류입력에 비례하는 추력이 발생하게 되어 코일과 헤드일체가 운동하게 되며, 이 경우 속도감지용 코일에는 모터의 역기능인 발전기의 원리 즉, 코일이 이동하게 되면 그 코일에서 전류가 발생되는 원리에 의해 코일과 헤드일체의 속도에 비례하는 전압이 발생하게 된다.On the other hand, the driving coil generates thrust in proportion to the current input according to the principle of the motor, so that the coil and the head move together. In this case, the speed sensing coil has the principle of a generator, which is the inverse function of the motor. The current generated in the coil generates a voltage proportional to the speed of the coil and the head.

이와같이 본고안은 보빈에 구동용 코일과 속도감지용 코일을 함께 권선시켜 하나의 보이스코일모터를 가지고 디스크헤드의 구동기능과 속도감지기능을 동시에 수행시킬 수 있으므로 제작단가를 저렴화시킴과 동시에 헤드양측의 보이스코일모터가 헤드의 구동에 모두 사용되므로 헤드운동의 안정화를 얻을 수 잇고, 헤드속도를 적분하면 헤드의 이동거리가 산출되므로 적분기를 별도로 설치하게 될 경우 헤드의 변위까지 감지할 수 있으며, 또한 변압기의 원리에서 볼 때 구동용 코일은 1차코일이 되고 감지용 코일은 2차코일이 되므로 코일들 사이에서 상호 유도현상이 발생하게 된다.In this way, this paper can wind the driving coil and the speed sensing coil together in the bobbin to perform the drive function and the speed sensing function of the disk head simultaneously with one voice coil motor. Since the coil motor is used to drive all the heads, the head movement can be stabilized, and if the head speed is integrated, the head's moving distance is calculated, so if the integrator is installed separately, the head displacement can be detected. In principle, the driving coil becomes the primary coil and the sensing coil becomes the secondary coil, so mutual induction occurs between the coils.

이에 의해 구동용 코일의 전기적 시정수가 작아지게 되어 구동용 코일에 가해지는 전류의 상승시간이 짧아지게 되므로써 레드의 동작시간이 빨라지는 효과가 있다.As a result, the electrical time constant of the driving coil is reduced, and the rise time of the current applied to the driving coil is shortened, thereby improving the red operating time.

Claims (1)

광디스크 구동용 보이스코일모터에 있어서. 보빈(1)에 속도감지용 코일(2)과 구동용 코일(3)이 함께 권선되므로써 디스크헤드(4)의 구동기능과 속도감지기능을 겸비하도록 된 것을 특징으로 하는 광디스크 구동용 보이스코일모터.In voice coil motor for driving optical disc. An optical disc drive voice coil motor, characterized in that the speed sensing coil (2) and the drive coil (3) are wound together in the bobbin (1) to combine the drive function and the speed detection function of the disk head (4).
KR2019900013523U 1990-08-31 1990-08-31 Voice coil motor for optical disc drive KR960009802Y1 (en)

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KR2019900013523U KR960009802Y1 (en) 1990-08-31 1990-08-31 Voice coil motor for optical disc drive

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KR2019900013523U KR960009802Y1 (en) 1990-08-31 1990-08-31 Voice coil motor for optical disc drive

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KR920005167U KR920005167U (en) 1992-03-26
KR960009802Y1 true KR960009802Y1 (en) 1996-11-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101021524B1 (en) * 2005-12-08 2011-03-16 주식회사 만도 Motor structure of electronic brake for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101021524B1 (en) * 2005-12-08 2011-03-16 주식회사 만도 Motor structure of electronic brake for vehicle

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