KR100701202B1 - Spindle motor - Google Patents

Spindle motor Download PDF

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Publication number
KR100701202B1
KR100701202B1 KR1020050098166A KR20050098166A KR100701202B1 KR 100701202 B1 KR100701202 B1 KR 100701202B1 KR 1020050098166 A KR1020050098166 A KR 1020050098166A KR 20050098166 A KR20050098166 A KR 20050098166A KR 100701202 B1 KR100701202 B1 KR 100701202B1
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KR
South Korea
Prior art keywords
bearing housing
bush
bearing
circumferential surface
rotor
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KR1020050098166A
Other languages
Korean (ko)
Inventor
이형건
Original Assignee
엘지이노텍 주식회사
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Priority to KR1020050098166A priority Critical patent/KR100701202B1/en
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Publication of KR100701202B1 publication Critical patent/KR100701202B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

A spindle motor is provided to increase lifetime by comprising a long bearing in order to prevent deviation of a rotation shaft. A spindle motor includes a bearing housing(110), a bearing installed in the bearing housing, a rotation shaft(130) supported by the bearing, a stator fixed on an outer surface of the bearing housing, a bush(160) for rotating inserted into an outer periphery of the rotation shaft, a rotor for rotating the bush, and an washer(190) for preventing deviation of the bush and rotation shaft. The bearing is installed between bottom and top of the bearing housing. The rotor couples with the bush, includes a disc at a top portion, and rotates the bush according to interaction with the stator. An outer periphery of the washer is supported to the bush. An inner periphery of the washer is supported to the bearing housing.

Description

스핀들 모터 {SPINDLE MOTOR}Spindle Motors {SPINDLE MOTOR}

도 1a는 종래의 스핀들 모터의 구성을 보인 단면도.Figure 1a is a cross-sectional view showing the configuration of a conventional spindle motor.

도 1b는 도 1a에 도시된 회전축 부위의 확대도.FIG. 1B is an enlarged view of the rotating shaft portion shown in FIG. 1A; FIG.

도 2a는 본 발명의 일 실시예에 따른 스핀들 모터의 구성을 보인 단면도.Figure 2a is a cross-sectional view showing the configuration of a spindle motor according to an embodiment of the present invention.

도 2b는 도 2a에 도시된 회전축 부위의 확대도.FIG. 2B is an enlarged view of the rotating shaft portion shown in FIG. 2A; FIG.

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

110 : 베어링하우징 120 : 베어링110: bearing housing 120: bearing

130 : 회전축 160 : 부시130: rotation axis 160: bush

111a,165a : 삽입홈 190 : 와셔111a, 165a: Insertion groove 190: Washer

본 발명은 스핀들 모터에 관한 것이다.The present invention relates to a spindle motor.

스핀들 모터는 직선운동하는 광 픽업이 디스크에 기록된 데이타를 읽을 수 있도록 디스크를 회전시키는 기능을 한다. 스핀들 모터 중, 노트북 등에 사용되는 스핀들 모터는 슬림형이 사용되는데, 슬림형 스핀들 모터는 턴테이블을 제거하고 회전자의 로터요크에 디스크를 탑재한 구조이다.The spindle motor functions to rotate the disk so that a linearly moving optical pickup can read the data recorded on the disk. Among the spindle motors, a slim type spindle motor used in a laptop or the like is used. The slim spindle motor is a structure in which a disk is mounted on a rotor yoke of a rotor by removing a turntable.

종래의 슬림형 스핀들 모터를 도 1a 및 도 1b를 참조하여 설명한다.A conventional slim spindle motor will be described with reference to FIGS. 1A and 1B.

도시된 바와 같이, 베이스(11)에 설치된 베어링하우징(13)의 내부에는 베어링(15)이 압입되고, 베어링(15)에는 회전축(17)의 하부측이 지지되어 설치된다.As shown, the bearing 15 is pressed into the bearing housing 13 installed in the base 11, the lower side of the rotating shaft 17 is supported on the bearing 15 is installed.

베어링하우징(13)의 외면에는 코어(21a)와 코일(21b)을 가지는 고정자(21)가 고정되고, 회전축(17)에는 부시(19)가 압입된다. 부시(19)에는 로터요크(23a)와 마그네트(23b)를 가지는 회전자(23)가 결합된다. 그리하여, 고정자(21)와 회전자(23)의 상호 작용에 의하여 회전자(23)가 회전하면서 회전축(17)을 회전시키는 것이다.A stator 21 having a core 21a and a coil 21b is fixed to an outer surface of the bearing housing 13, and a bush 19 is press-fitted to the rotary shaft 17. The rotor 19 has a rotor yoke 23a and a magnet 23b coupled to the bush 19. Thus, by rotating the rotor 23 by the interaction of the stator 21 and the rotor 23, the rotating shaft 17 is rotated.

로터요크(23a)의 상면에는 디스크(50)가 탑재되는데, 디스크(50)는 부시(19)에 설치된 클램프(25)에 탄성 지지된다.The disk 50 is mounted on the upper surface of the rotor yoke 23a, and the disk 50 is elastically supported by the clamp 25 provided in the bush 19.

회전축(17)의 외주면 하부측에는 와셔(27)가 삽입된다. 상세히 설명하면, 도 1b에 도시된 바와 같이, 와셔(27)의 외주면은 베어링하우징(13)의 내주면에 삽입되고, 내주면은 회전축(17)의 외주면에 삽입되어, 회전축(17)이 상측으로 이탈되는 것을 방지한다. 즉, 와셔(27)는 회전축(17), 부시(19) 및 회전자(23)를 포함하는 회전자부의 이탈을 방지한다.The washer 27 is inserted into the lower side of the outer circumferential surface of the rotary shaft 17. In detail, as shown in FIG. 1B, the outer circumferential surface of the washer 27 is inserted into the inner circumferential surface of the bearing housing 13, and the inner circumferential surface is inserted into the outer circumferential surface of the rotating shaft 17, so that the rotating shaft 17 is separated upward. Prevent it. That is, the washer 27 prevents the detachment of the rotor portion including the rotary shaft 17, the bush 19 and the rotor 23.

그러나, 상기와 같은 종래의 스핀들 모터는 와셔(27)의 외주면 및 내주면이 베어링하우징(13)의 내주면 및 회전축(17)의 외주면에 각각 삽입된 구조이므로, 베어링하우징(13)의 내부에 설치된 베어링(15)이 와셔(27)의 상측에 위치되어야 한다. 그러면,베어링(15)의 길이가 와셔(27)의 두께(t1) 만큼 짧아지는데, 베어링(15)의 길이가 짧으면 베어링(15)의 마모 속도가 빨라 스핀들 모터의 수명이 단축되는 단점이 있다.However, the conventional spindle motor as described above has a structure in which the outer circumferential surface and the inner circumferential surface of the washer 27 are respectively inserted into the inner circumferential surface of the bearing housing 13 and the outer circumferential surface of the rotating shaft 17, so that the bearings are installed in the bearing housing 13. (15) should be located above the washer 27. Then, the length of the bearing 15 is shortened by the thickness t1 of the washer 27. However, if the length of the bearing 15 is short, the wear speed of the bearing 15 is high and the life of the spindle motor is shortened.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 목적은 회전축의 이탈을 방지하는 와셔의 설치구조를 변경하여 베어링의 길이를 최대한 길게하므로서, 수명을 향상시킬 수 있는 스핀들 모터를 제공함에 있다.The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to change the installation structure of the washer to prevent the separation of the rotation axis by making the length of the bearing as long as possible, to improve the life In providing a spindle motor.

상기 목적을 달성하기 위한 본 발명에 따른 스핀들 모터는, 베어링하우징; 상기 베어링하우징의 내부에 설치되며, 저면은 상기 베어링하우징의 저면과 접촉하고 상면은 상기 베어링하우징이 상면과 동일한 높이에 위치된 베어링; 상기 베어링에 하부측이 지지된 회전축; 상기 베어링하우징의 외면에 고정된 고정자; 상기 회전축의 상부측 외주면에 압입되어 상기 회전축과 동일하게 회전하는 부시; 상기 부시에 결합되고, 상면에는 디스크가 탑재되며, 상기 고정자와의 작용에 의하여 회전하면서 상기 부시를 회전시키는 회전자; 및 외주면은 상기 부시에 지지되고, 내주면은 상기 베어링하우징에 지지되어 상기 부시가 상측으로 이탈하는 것을 방지하는 와셔를 구비한다.Spindle motor according to the present invention for achieving the above object, the bearing housing; A bearing installed in the bearing housing, a bottom surface of which is in contact with a bottom surface of the bearing housing, and an upper surface of which is located at the same height as the upper surface of the bearing housing; A rotating shaft having a lower side supported by the bearing; A stator fixed to an outer surface of the bearing housing; A bush press-fitted to an upper circumferential surface of the rotary shaft to rotate the same as the rotary shaft; A rotor coupled to the bush and having a disk mounted on an upper surface thereof to rotate the bush while rotating by the action of the stator; And an outer circumferential surface supported by the bush, and an inner circumferential surface supported by the bearing housing to prevent the bush from escaping upward.

이하, 첨부한 도면을 참조하여 본 발명의 일 실시예에 따른 스핀들 모터를 상세히 설명한다.Hereinafter, a spindle motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2a는 본 발명의 일 실시예에 따른 스핀들 모터의 구성을 보인 단면도이고, 도 2b는 도 2a에 도시된 회전축 부위의 확대도이다.Figure 2a is a cross-sectional view showing the configuration of a spindle motor according to an embodiment of the present invention, Figure 2b is an enlarged view of the rotating shaft portion shown in Figure 2a.

도시된 바와 같이, 본 실시예에 따른 스핀들 모터(100)는 베이스(200)에 기 립 설치된 베어링하우징(110)을 가지고, 베어링하우징(110)은 상하면이 개방된 원통형의 하우징(111)과 하우징(111)의 저면에 결합되는 하부커버(115)를 가진다.As shown, the spindle motor 100 according to the present embodiment has a bearing housing 110 standing upright in the base 200, the bearing housing 110 is a cylindrical housing 111 and the upper and lower openings and the housing It has a lower cover 115 coupled to the bottom of the (111).

베어링하우징(110)의 내주면에는 베어링(120)이 압입되어 설치되고, 베어링(120)에는 회전가능하게 설치된 회전축(130)의 하부측이 지지된다.The bearing 120 is pressed into the inner circumferential surface of the bearing housing 110, and the lower side of the rotating shaft 130 rotatably installed is supported by the bearing 120.

베어링하우징(110)의 외주면에는 코어(141)와 코어(141)에 권선된 코일(145)을 가지는 고정자(140)가 고정되고, 베어링하우징(110)의 상측으로 노출된 회전축(130)의 위에는 회전자(150)가 결합된다. 상세히 설명하면, 베어링하우징(110)의 상측으로 노출된 회전축(130)의 상부측 외면에는 부시(160)가 결합되고, 부시(160)에 회전자(150)가 결합된다. 회전자(150)는 하면이 개방된 원통형으로 마련되어 부시(160)에 고정되며 고정자(140)를 감싸는 로터요크(151)와 로터요크(151)의 내주면에 접착되어 고정자(140)와 대향하는 마그네트(155)를 가진다.A stator 140 having a core 141 and a coil 145 wound around the core 141 is fixed to an outer circumferential surface of the bearing housing 110, and above the rotating shaft 130 exposed to the upper side of the bearing housing 110. Rotor 150 is coupled. In detail, the bush 160 is coupled to the upper outer surface of the rotating shaft 130 exposed to the upper side of the bearing housing 110, and the rotor 150 is coupled to the bush 160. The rotor 150 is provided in a cylindrical shape with a lower surface fixed to the bush 160 and adhered to the inner circumferential surface of the rotor yoke 151 and the rotor yoke 151 surrounding the stator 140 to face the stator 140. Has 155.

로터요크(151)에는 디스크(50)가 탑재되고, 부시(160)에는 회전축(130)의 중심과 디스크(50)의 중심이 일치하도록 디스크(50)를 탄성 지지하는 클램프(170)가 설치된다.The rotor yoke 151 is equipped with a disk 50, and the bush 160 is provided with a clamp 170 for elastically supporting the disk 50 so that the center of the rotation shaft 130 and the center of the disk 50 coincide with each other. .

그리하여, 코일(145)에 전류가 인가되면, 코일(145)에서 발생하는 전기장과 마그네트(155)에서 발생하는 자기장과의 작용에 의하여 회전자(150)가 회전하고, 이로인해 부시(160)와 회전축(130)이 회전하는 것이다.Thus, when a current is applied to the coil 145, the rotor 150 rotates by the action of the electric field generated in the coil 145 and the magnetic field generated in the magnet 155, thereby causing the bush 160 and The rotating shaft 130 is to rotate.

베어링하우징(110)의 하부커버(115)의 저면에는 회전축(130)의 저면과 접촉하여 베어링하우징(110)의 마모를 방지함과 동시에 회전축(130)의 원활한 회전을 도와주는 스러스트(Thrust) 플레이트(180)가 설치된다.Thrust plate on the bottom of the lower cover 115 of the bearing housing 110 in contact with the bottom surface of the rotating shaft 130 to prevent wear of the bearing housing 110 and at the same time help smooth rotation of the rotating shaft 130. 180 is installed.

본 실시예에 따른 스핀들 모터(100)는 최대한 긴 길이의 베어링(120)을 채택할 수 있도록, 회전축(130), 부시(160) 및 회전자(150)를 포함하는 회전자부가 베어링하우징(110)의 상측으로 이탈하는 것을 방지하는 와셔(190)를 베어링하우징(110)의 외면에 설치한다.The spindle motor 100 according to the present embodiment has a rotor housing including a rotating shaft 130, a bush 160, and a rotor 150 so as to adopt the bearing 120 having the longest length. A washer 190 is installed on the outer surface of the bearing housing 110 to prevent it from escaping upward.

상세히 설명하면, 베어링(120)의 저면은 베어링하우징(110)의 하부커버(115)의 저면과 접촉하고 상면은 베어링하우징(110)의 하우징(111)이 상면과 동일한 높이에 위치된다. 즉, 베어링(120)은 베어링하우징(110)의 높이와 대응되는 길이를 가진다.In detail, the bottom of the bearing 120 is in contact with the bottom of the lower cover 115 of the bearing housing 110 and the upper surface of the housing 111 of the bearing housing 110 is located at the same height as the top surface. That is, the bearing 120 has a length corresponding to the height of the bearing housing 110.

그리고, 와셔(190)의 외주면은 부시(160)에 지지되고, 내주면은 베어링하우징(110)에 외주면에 지지된다.The outer circumferential surface of the washer 190 is supported by the bush 160, and the inner circumferential surface is supported by the bearing housing 110 on the outer circumferential surface.

더 구체적으로는, 부시(160)는 관형태로 형성되어 회전축(130)에 압입되는 제 1 결합부(161)와 제 1 결합부(161)의 하단부측에서 외측으로 연장 형성되어 링형상을 이루는 제 2 결합부(165)를 가진다. 제 2 결합부의 내주면은 베어링하우징(110)의 하우징(111)의 상부측 외면과 대향하고, 외주면에는 로터요크(151)가 결합된다. 그리고, 상호 대향하는 제 2 결합부(165)의 내주면과 베어링하우징(110)의 하우징(111)의 상부측 외주면에는 와셔(190)의 외주면과 내주면이 각각 삽입되는 링형상의 삽입홈(165a,111a)이 각각 형성된다.More specifically, the bush 160 is formed in a tubular shape extending from the lower end side of the first coupling portion 161 and the first coupling portion 161 to be pressed into the rotating shaft 130 to form a ring shape It has a second coupling portion 165. The inner circumferential surface of the second coupling portion faces the upper outer surface of the housing 111 of the bearing housing 110, and the rotor yoke 151 is coupled to the outer circumferential surface. A ring-shaped insertion groove 165a into which the outer circumferential surface and the inner circumferential surface of the washer 190 are respectively inserted into the inner circumferential surface of the second coupling portion 165 facing each other and the upper outer circumferential surface of the housing 111 of the bearing housing 110. 111a) are formed respectively.

베이스(200)에 고정된 베어링하우징(110)의 삽입홈(111a)에 와셔(190)의 내주면이 삽입되고, 와셔(190)의 외주면은 부시(160)의 삽입홈(165a)에 삽입되므로, 와셔(190)에 의하여 부시(160), 회전자(150) 및 회전축(130)이 베어링하우징(110) 의 상측으로 이탈되지 않는 것이다. 그리고, 와셔(190)가 베어링하우징(110)의 외면에 결합되므로, 베어링(120)의 설치 위치 및 구조를 제한하는 부품은 아무 것도 존재하지 않는다. 그러므로, 베어링하우징(110)의 높이와 동일한 길이를 가지는 베어링(120)을 베어링하우징(110)에 설치할 수 있으므로, 최대한 긴 베어링(120)을 채택하여 사용할 수 있다.Since the inner circumferential surface of the washer 190 is inserted into the insertion groove 111a of the bearing housing 110 fixed to the base 200, and the outer circumferential surface of the washer 190 is inserted into the insertion groove 165a of the bush 160. The washer 190 does not allow the bush 160, the rotor 150, and the rotation shaft 130 to be separated from the upper side of the bearing housing 110. And, since the washer 190 is coupled to the outer surface of the bearing housing 110, there is no part that restricts the installation position and structure of the bearing 120. Therefore, the bearing 120 having the same length as the height of the bearing housing 110 can be installed in the bearing housing 110, so that the longest bearing 120 can be adopted and used.

이상에서 설명한 바와 같이, 본 발명에 따른 스핀들 모터는 베어링이 설치되는 베어링하우징의 내부에 베어링의 설치를 제한하는 부품이 존재하지 않는다. 그러므로, 베어링하우징의 높이와 동일한 길이를 가지는 베어링을 채택하여 사용할 수 있으므로, 상대적으로 긴 길이의 베어링을 설치하여 사용할 수 있다. 그러면, 베어링의 마모 속도가 늦어지므로, 스핀들 모터의 수명이 길어진다.As described above, in the spindle motor according to the present invention, there is no component that restricts the installation of the bearing in the bearing housing in which the bearing is installed. Therefore, a bearing having the same length as the height of the bearing housing can be adopted and used, so that a bearing having a relatively long length can be installed and used. Then, the wear speed of the bearing is slowed down, and thus the life of the spindle motor is long.

이상에서는, 본 발명의 일 실시예에 따라 본 발명을 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 변경 및 변형한 것도 본 발명에 속함은 당연하다.In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (2)

베어링하우징;Bearing housings; 상기 베어링하우징의 내부에 설치되며, 저면은 상기 베어링하우징의 저면과 접촉하고 상면은 상기 베어링하우징이 상면과 동일한 높이에 위치된 베어링;A bearing installed in the bearing housing, the bottom surface of the bearing housing being in contact with the bottom surface of the bearing housing, and the top surface of the bearing housing positioned at the same height as the upper surface of the bearing housing; 상기 베어링에 하부측이 지지된 회전축;A rotating shaft having a lower side supported by the bearing; 상기 베어링하우징의 외면에 고정된 고정자;A stator fixed to an outer surface of the bearing housing; 상기 회전축의 상부측 외주면에 압입되어 상기 회전축과 동일하게 회전하는 부시;A bush press-fitted to an upper circumferential surface of the rotary shaft to rotate the same as the rotary shaft; 상기 부시에 결합되고, 상면에는 디스크가 탑재되며, 상기 고정자와의 작용에 의하여 회전하면서 상기 부시를 회전시키는 회전자;A rotor coupled to the bush and having a disk mounted on an upper surface thereof to rotate the bush while rotating by the action of the stator; 외주면은 상기 부시에 지지되고, 내주면은 상기 베어링하우징에 지지되어 상기 부시가 상측으로 이탈하는 것을 방지하는 와셔를 포함하는 스핀들모터.An outer circumferential surface is supported by the bush, and an inner circumferential surface is supported by the bearing housing to prevent the bush from escaping upward. 제 1 항에 있어서,The method of claim 1, 상기 부시는 상기 회전축에 압입되는 제 1 결합부, 상기 제 1 결합부의 하단부측에서 외측으로 연장 형성되어 상기 베어링하우징의 상부측 외면과 대향하며 상기 회전자가 결합되는 제 2 결합부를 가지고,The bush has a first coupling portion press-fitted to the rotary shaft, a second coupling portion extending outward from the lower end side of the first coupling portion to face the upper outer surface of the bearing housing and to which the rotor is coupled. 상호 대향하는 상기 제 2 결합부의 내주면과 상기 베어링하우징의 상부측 외주면에는 상기 와셔의 외주면과 내주면이 각각 삽입되는 삽입홈이 각각 형성된 스핀들 모터.Spindle motors are formed in the inner circumferential surface of the second coupling portion facing each other and the outer circumferential surface of the upper side of the bearing housing are inserted grooves for inserting the outer circumferential surface and the inner circumferential surface of the washer respectively.
KR1020050098166A 2005-10-18 2005-10-18 Spindle motor KR100701202B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101561213B1 (en) * 2009-01-05 2015-10-16 엘지이노텍 주식회사 spindle motor

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KR20030024355A (en) * 2001-09-18 2003-03-26 엘지이노텍 주식회사 Spindle motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030024355A (en) * 2001-09-18 2003-03-26 엘지이노텍 주식회사 Spindle motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101561213B1 (en) * 2009-01-05 2015-10-16 엘지이노텍 주식회사 spindle motor

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