KR20090005886U - Spindle motor - Google Patents

Spindle motor Download PDF

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Publication number
KR20090005886U
KR20090005886U KR2020070019909U KR20070019909U KR20090005886U KR 20090005886 U KR20090005886 U KR 20090005886U KR 2020070019909 U KR2020070019909 U KR 2020070019909U KR 20070019909 U KR20070019909 U KR 20070019909U KR 20090005886 U KR20090005886 U KR 20090005886U
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KR
South Korea
Prior art keywords
rotating shaft
guide member
center guide
circumferential surface
spindle motor
Prior art date
Application number
KR2020070019909U
Other languages
Korean (ko)
Inventor
박재현
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR2020070019909U priority Critical patent/KR20090005886U/en
Publication of KR20090005886U publication Critical patent/KR20090005886U/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • G11B17/0284—Positioning or locking of single discs of discs rotating during transducing operation by clampers
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • 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
    • 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
    • H02K5/1672—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 both ends of the rotor
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03—Machines characterised by thrust bearings

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

Abstract

스핀들 모터가 개시된다. 상기 스핀들 모터는 회전축에 삽입 지지된 센터가이드부재의 지지공의 내주면에 상호 소정 간격을 가지는 복수의 접촉돌기가 형성되어 회전축의 외주면에 접촉된다. 따라서, 회전축과 센터가이드부재 사이의 접촉 면적이 줄어, 회전축과 센터가이드부재 사이의 마찰력이 감소하므로, 센터가이드부재가 회전축을 따라 원활하게 승강한다.Spindle motor is disclosed. The spindle motor has a plurality of contact protrusions formed at predetermined intervals on the inner circumferential surface of the support hole of the center guide member inserted and supported by the rotating shaft to contact the outer circumferential surface of the rotating shaft. Therefore, the contact area between the rotating shaft and the center guide member is reduced, so that the friction force between the rotating shaft and the center guide member is reduced, so that the center guide member moves up and down smoothly along the rotating shaft.

Description

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

도 1a는 종래의 스핀들 모터의 요부 단면도.1A is a sectional view of principal parts of a conventional spindle motor.

도 1b는 도 1a에 도시된 센터가이드부재의 평면도.Figure 1b is a plan view of the center guide member shown in Figure 1a.

도 2는 본 고안의 일 실시예에 따른 스핀들 모터의 단면도.2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention.

도 3은 도 2에 도시된 센터가이드부재의 평면도.3 is a plan view of the center guide member shown in FIG.

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

110 : 베이스 120 : 베어링하우징110: base 120: bearing housing

130 : 베어링 140 : 회전축130: bearing 140: rotating shaft

170 : 턴테이블 181 : 센터가이드부재170: turntable 181: center guide member

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

일반적인 CD(Compact Disk)는 정보가 기록되는 트랙과 트랙 사이의 간격이 1.6㎛인 반면, BD(Blu-Ray Disk)는 트랙과 트랙 사이의 간격이 0.4㎛이다.A typical CD (Compact Disk) has a distance between tracks on which information is recorded and a track is 1.6 mu m, while a BD (Blu-Ray Disk) has a distance between tracks and a track at 0.4 mu m.

그러므로, 트랙과 트랙 사이의 간격이 고밀도인 BD의 경우에는, CD에 비하여 더욱 견고하고 정밀하게 지지되어 회전되어야 한다. 이를 위하여, BD가 삽입되어 지지되는 센터가이드부재를 회전축에 승강가능하게 설치하고, 상기 센터가이드부재를 스프링으로 지지하여, 조심성능을 향상시킨 스핀들 모터가 개발되었다.Therefore, in the case of a BD with a high gap between the track and the track, it must be supported and rotated more firmly and precisely than the CD. To this end, a spindle motor has been developed in which a center guide member on which a BD is inserted and supported is liftably mounted on a rotating shaft, and the center guide member is supported by a spring to improve the careful performance.

센터가이드부재가 설치된 종래의 스핀들 모터를 도 1a 및 도 1b를 참조하여 설명한다. 도 1a는 종래의 스핀들 모터의 요부 단면도이고, 도 1b는 도 1a에 도시된 센터가이드부재의 평면도이다.A conventional spindle motor provided with a center guide member will be described with reference to FIGS. 1A and 1B. 1A is a cross-sectional view of main parts of a conventional spindle motor, and FIG. 1B is a plan view of the center guide member shown in FIG. 1A.

도시된 바와 같이, 회전가능하게 설치된 회전축(11)에 디스크(50)가 탑재되어 지지되는 턴테이블(13)이 결합되고, 턴테이블(13) 상측의 회전축(11)의 외주면에는 센터가이드부재(15)와 부시(17)가 승강가능하게 결합된다. 이때, 센터가이드부재(15)와 부시(17)는 황동 또는 합성수지제로 형성된다.As shown, the turntable 13 on which the disc 50 is mounted and supported is coupled to the rotating shaft 11 rotatably installed, and the center guide member 15 is formed on the outer circumferential surface of the rotating shaft 11 above the turntable 13. And bush 17 are coupled to be liftable. At this time, the center guide member 15 and the bush 17 is formed of brass or synthetic resin.

턴테이블(13)과 센터가이드부재(15) 사이에는 스프링(19)이 마련되는데, 스프링(19)은 센터가이드부재(15)를 수직 및 수평방향으로 지지하여, 턴테이블(13)에 탑재된 디스크(50)의 중심이 회전축(11)의 중심과 일치하도록 탄성 지지한다.A spring 19 is provided between the turntable 13 and the center guide member 15. The spring 19 supports the center guide member 15 in the vertical and horizontal directions so that the disk mounted on the turntable 13 ( 50 is elastically supported so that its center coincides with the center of the rotation shaft 11.

센터가이드부재(15)는 내주면이 회전축(11)의 외주면에 접촉 지지되어 승강한다.The center guide member 15 is moved up and down by the inner circumferential surface being supported by the outer circumferential surface of the rotation shaft 11.

종래의 스핀들 모터는 센터가이드부재(15)의 내주면 전체가 회전축(11)의 외주면에 접촉하므로, 원활하게 승강하지 못하는 단점이 있다.In the conventional spindle motor, since the entire inner circumferential surface of the center guide member 15 contacts the outer circumferential surface of the rotation shaft 11, the conventional spindle motor has a disadvantage in that it cannot be smoothly lifted and lowered.

그리고, 센터가이드부재(15)의 원활한 승강을 위해서는 윤활유를 주입하거나, 센터가이드부재(15)의 내경 치수 관리를 정밀하게 수행하여야 한다. 그런데, 센터가이드부재(15)를 황동제로 가공하는 경우에는 센터가이드부재(15)의 내경을 정밀하게 형성할 수 있으나, 합성수지제로 사출하는 경우에는 변형이 발생하므로 가공 공정을 별도로 수행하여야 하는 불편함이 있다.In addition, in order to smoothly lift and lower the center guide member 15, lubricant oil should be injected or the inner diameter dimension management of the center guide member 15 should be precisely performed. By the way, when processing the center guide member 15 made of brass, the inner diameter of the center guide member 15 can be precisely formed, but in the case of injection into the synthetic resin, deformation occurs, so it is inconvenient to perform a separate processing process. There is this.

본 고안은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 고안의 목적은 센터가이드부재가 원활하게 승강할 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 provide a spindle motor that can be easily elevated center guide member.

상기 목적을 달성하기 위한 본 고안에 따른 스핀들 모터는, 회전가능하게 설치된 회전축; 상기 회전축의 주위에 고정된 고정자; 상기 회전축에 결합되며 상기 고정자와 작용하여 회전하면서 상기 회전축을 회전시키는 회전자; 상기 회전축에 결합되어 상기 회전축과 일체로 회전하며 디스크가 탑재 지지되는 턴테이블; 상기 회전축의 외주면에 내주면이 접촉 지지되는 지지공이 형성되어 상기 회전축에 승강가능하게 결합되며 상기 디스크의 중심이 상기 회전축의 중심과 일치하도록 지지하는 센터가이드부재; 상기 턴테이블과 상기 센터가이드부재 사이에 설치되어 상기 센터가이드부재를 지지하는 탄성부재를 포함하고,Spindle motor according to the present invention for achieving the above object, a rotating shaft rotatably installed; A stator fixed around the rotating shaft; A rotor coupled to the rotating shaft and rotating the rotating shaft while acting with the stator; A turntable coupled to the rotating shaft and integrally rotating with the rotating shaft and supported by a disk; A center guide member formed on an outer circumferential surface of the rotating shaft to support the inner circumferential surface thereof so as to be lifted and coupled to the rotating shaft, the center guide member supporting the center of the disk to coincide with the center of the rotating shaft; An elastic member installed between the turntable and the center guide member to support the center guide member;

상기 센터가이드부재의 내주면에는 상호 간격을 가지면서 형성되어 상기 회전축의 외주면과 접촉하는 복수의 접촉레일이 형성된다.A plurality of contact rails are formed on the inner circumferential surface of the center guide member so as to be in contact with the outer circumferential surface of the rotating shaft.

이하, 첨부된 도면을 참조하여 본 고안의 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 2는 본 고안의 일 실시예에 따른 스핀들 모터의 단면도이고, 도 3은 도 2에 도시된 센터가이드부재의 평면도이다.2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention, Figure 3 is a plan view of the center guide member shown in FIG.

도시된 바와 같이, 본 실시예에 따른 스핀들 모터는 베이스(110)와 베이스(110)에 수직으로 기립 설치된 베어링하우징(120)을 가진다.As shown, the spindle motor according to the present embodiment has a base 110 and a bearing housing 120 standing upright with the base 110.

이하, 구성요소들의 면 및 방향을 지칭함에 있어서, 베이스(110)를 기준으로 상측을 향하는 면 및 방향을 "상면 및 상측", 하측을 향하는 면 및 방향을 "하면 및 하측"이라 한다.Hereinafter, in referring to the surface and the direction of the components, the surface and direction facing upward relative to the base 110 is referred to as "upper and upper side", and the surface and direction facing downward are referred to as "lower and lower".

베어링하우징(120)은 상면이 개방되고, 하면은 밀폐되며 하면측 외주면이 베이스(110)에 결합된다.The bearing housing 120 has an upper surface open, a lower surface is closed, and a lower surface side outer peripheral surface thereof is coupled to the base 110.

베어링하우징(120)의 내부에는 베어링(130)이 고정되고, 베어링(130)에는 회전축(140)의 하부측이 지지되어 회전가능하게 설치된다. 베어링하우징(120)에는 고정자(150)가 고정되고, 회전축(140)측에는 고정자(150)와 작용하여 회전축(140)과 일체로 회전하는 회전자(160)가 고정된다.The bearing 130 is fixed to the inside of the bearing housing 120, and the lower side of the rotating shaft 140 is supported on the bearing 130 to be rotatably installed. The stator 150 is fixed to the bearing housing 120, and the rotor 160 which is integrally rotated with the rotation shaft 140 by the stator 150 is fixed to the rotation shaft 140.

고정자(150)는 베어링하우징(120)의 외주면에 고정된 코어(151)와 코어(151)에 권선된 코일(155)을 가지고, 회전자(160)는 베어링하우징(120)의 상측으로 노출된 회전축(140)측의 부위에 고정된 로터요크(161)와 로터요크(161)의 내주면에 고정되어 고정자(150)와 대향하는 마그네트(165)를 가진다. 그리하여, 코일(155)에 전류가 공급되면, 코일(155)과 마그네트(165) 사이에 형성되는 전자기력에 의하여 회전자(160)가 회전하면서 회전축(140)을 일체로 회전시킨다.The stator 150 has a core 151 fixed to the outer circumferential surface of the bearing housing 120 and a coil 155 wound around the core 151, and the rotor 160 is exposed to the upper side of the bearing housing 120. The rotor yoke 161 fixed to the portion on the side of the rotation shaft 140 and the magnet 165 is fixed to the inner circumferential surface of the rotor yoke 161 to face the stator 150. Thus, when a current is supplied to the coil 155, the rotating shaft 140 is integrally rotated while the rotor 160 is rotated by the electromagnetic force formed between the coil 155 and the magnet 165.

로터요크(161) 상측의 회전축(140) 외주면에는 디스크(50)가 탑재되어 지지되며 회전축(140)과 일체로 회전하는 턴테이블(170)이 결합된다. 턴테이블(170)과 회전축(140)의 견고한 결합을 위하여, 턴테이블(170)의 중앙부측에는 결합관(172) 이 돌출 형성되고, 결합관(172)의 외주면에 로터요크(161)가 결합된다.The disk 50 is mounted and supported on the outer circumferential surface of the rotating shaft 140 on the upper side of the rotor yoke 161, and the turntable 170 which is integrally rotated with the rotating shaft 140 is coupled. In order to firmly couple the turntable 170 and the rotary shaft 140, a coupling pipe 172 is protruded from the center portion of the turntable 170, and the rotor yoke 161 is coupled to an outer circumferential surface of the coupling pipe 172.

그리고, 턴테이블(170) 상측의 회전축(140) 외주면에는 센터가이드부재(181) 및 부시(185)가 승강가능하게 설치된다.In addition, a center guide member 181 and a bush 185 may be provided on the outer circumferential surface of the rotary shaft 140 above the turntable 170 so as to be liftable.

센터가이드부재(181)는 디스크(50)의 내주면과 접촉하여, 턴테이블(170)에 탑재된 디스크(50)의 중심이 회전축(140)이 중심과 일치하도록 지지한다. 그리고, 부시(185)는 디스크(50)가 센터가이드부재(181)에 삽입되도록 안내한다.The center guide member 181 contacts the inner circumferential surface of the disk 50 to support the center of the disk 50 mounted on the turntable 170 so that the rotation shaft 140 coincides with the center. In addition, the bush 185 guides the disk 50 to be inserted into the center guide member 181.

턴테이블(170)과 센터가이드부재(181) 사이에는 탄성부재(188)가 설치되는데, 탄성부재(188)는 센터가이드부재(181)의 중심이 회전축(140)의 중심과 일치하도록 센터가이드부재(181)를 수직 및 수평 방향으로 탄성 지지한다.An elastic member 188 is installed between the turntable 170 and the center guide member 181, and the elastic member 188 includes a center guide member (ie, a center guide member 181 so that the center of the center guide member 181 coincides with the center of the rotation shaft 140). 181 is elastically supported in the vertical and horizontal directions.

센터가이드부재(181)는 황동 또는 합성수지제로 형성되며, 중앙부에 내주면이 회전축(140)의 외주면에 접촉 지지되는 지지공(181a)이 형성된다. 즉, 센터가이드부재(181)는 지지공(181a)의 내주면이 회전축(140)의 외주면에 접촉 지지되어 승강한다. 이때, 지지공(181a)의 내주면과 회전축(140)의 외주면 사이의 마찰력이 크면, 센터가이드부재(181)가 원활하게 승강하지 못한다.The center guide member 181 is formed of brass or synthetic resin, and a support hole 181a is formed in which the inner circumferential surface is in contact with the outer circumferential surface of the rotating shaft 140. That is, the center guide member 181 is moved up and down by the inner circumferential surface of the support hole 181a in contact with the outer circumferential surface of the rotation shaft 140. At this time, if the frictional force between the inner circumferential surface of the support hole (181a) and the outer circumferential surface of the rotating shaft 140 is large, the center guide member 181 may not rise and fall smoothly.

본 실시예에 따른 스핀들 모터는 센터가이드부재(181)와 회전축(140) 사이의 마찰력을 줄여 센터가이드부재(181)가 원활하게 승강할 수 있도록 도와주는 수단이 마련된다.Spindle motor according to the present embodiment is provided with a means for reducing the friction between the center guide member 181 and the rotating shaft 140 to help the center guide member 181 to move up and down smoothly.

상기 수단은 지지공(181a)의 내주면에 상호 소정 간격을 가지면서 축방향으로 돌출 형성된 복수의 접촉레일(181b)로 마련된다. 즉, 접촉레일(181b)이 회전축(140)의 외주면에 접촉 지지되어 센터가이드부재(181)가 회전축(140)에 지지되므 로, 센터가이드부재(181)와 회전축(140) 사이의 접촉 면적이 줄어든다. 따라서, 센터가이드부재(181)와 회전축(140)의 마찰력이 감소하므로, 센터가이드부재(181)가 원활하게 승강한다.The means is provided with a plurality of contact rails (181b) protruding in the axial direction with a predetermined distance from each other on the inner peripheral surface of the support hole (181a). That is, since the contact rail 181b is in contact with the outer circumferential surface of the rotation shaft 140 and the center guide member 181 is supported by the rotation shaft 140, the contact area between the center guide member 181 and the rotation shaft 140 is increased. Decreases. Therefore, since the frictional force between the center guide member 181 and the rotating shaft 140 is reduced, the center guide member 181 moves up and down smoothly.

미설명 부호 190은 스핀들 모터의 회전시 디스크(50)가 미끄러지는 것을 방지하는 펠트이다.Reference numeral 190 is a felt that prevents the disk 50 from sliding during rotation of the spindle motor.

이상에서 설명한 바와 같이, 본 고안에 따른 스핀들 모터는 회전축에 삽입 지지된 센터가이드부재의 지지공의 내주면에 상호 소정 간격을 가지는 복수의 접촉돌기가 형성되어 회전축의 외주면에 접촉된다. 따라서, 회전축과 센터가이드부재 사이의 접촉 면적이 줄어, 회전축과 센터가이드부재 사이의 마찰력이 감소하므로, 센터가이드부재가 회전축을 따라 원활하게 승강한다.As described above, the spindle motor according to the present invention is formed on the inner circumferential surface of the support hole of the center guide member inserted into the rotating shaft is formed a plurality of contact projections having a predetermined interval to contact the outer circumferential surface of the rotating shaft. Therefore, the contact area between the rotating shaft and the center guide member is reduced, so that the friction force between the rotating shaft and the center guide member is reduced, so that the center guide member moves up and down smoothly along the rotating shaft.

이상에서는, 본 고안의 일 실시예에 따라 본 고안을 설명하였지만, 본 고안이 속하는 기술분야에서 통상의 지식을 가진 자가 본 고안의 기술적 사상을 벗어나지 않는 범위 내에서 변경 및 변형한 것도 본 고안에 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 belongs without modification and modification within the scope without departing from the technical spirit of the present invention. Of course.

Claims (2)

회전가능하게 설치된 회전축;A rotating shaft rotatably installed; 상기 회전축의 주위에 고정된 고정자;A stator fixed around the rotating shaft; 상기 회전축에 결합되며 상기 고정자와 작용하여 회전하면서 상기 회전축을 회전시키는 회전자;A rotor coupled to the rotating shaft and rotating the rotating shaft while acting with the stator; 상기 회전축에 결합되어 상기 회전축과 일체로 회전하며 디스크가 탑재 지지되는 턴테이블;A turntable coupled to the rotating shaft and integrally rotating with the rotating shaft and supported by a disk; 상기 회전축의 외주면에 내주면이 접촉 지지되는 지지공이 형성되어 상기 회전축에 승강가능하게 결합되며 상기 디스크의 중심이 상기 회전축의 중심과 일치하도록 지지하는 센터가이드부재;A center guide member formed on an outer circumferential surface of the rotating shaft to support the inner circumferential surface thereof so as to be lifted and coupled to the rotating shaft, the center guide member supporting the center of the disk to coincide with the center of the rotating shaft; 상기 턴테이블과 상기 센터가이드부재 사이에 설치되어 상기 센터가이드부재를 지지하는 탄성부재를 포함하고,An elastic member installed between the turntable and the center guide member to support the center guide member; 상기 센터가이드부재의 내주면에는 상호 간격을 가지면서 형성되어 상기 회전축의 외주면과 접촉하는 복수의 접촉레일이 형성된 스핀들 모터.A spindle motor having a plurality of contact rails formed on the inner circumferential surface of the center guide member with a mutual gap to contact the outer circumferential surface of the rotating shaft. 제 1 항에 있어서,The method of claim 1, 상기 접촉레일은 축방향으로 형성된 스핀들 모터.The contact rail is a spindle motor formed in the axial direction.
KR2020070019909U 2007-12-11 2007-12-11 Spindle motor KR20090005886U (en)

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