KR20090022318A - Spindle motor - Google Patents

Spindle motor Download PDF

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Publication number
KR20090022318A
KR20090022318A KR1020070087584A KR20070087584A KR20090022318A KR 20090022318 A KR20090022318 A KR 20090022318A KR 1020070087584 A KR1020070087584 A KR 1020070087584A KR 20070087584 A KR20070087584 A KR 20070087584A KR 20090022318 A KR20090022318 A KR 20090022318A
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KR
South Korea
Prior art keywords
turntable
felt
spindle motor
disk
guide member
Prior art date
Application number
KR1020070087584A
Other languages
Korean (ko)
Inventor
김용주
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020070087584A priority Critical patent/KR20090022318A/en
Publication of KR20090022318A publication Critical patent/KR20090022318A/en

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    • 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
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • 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

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

Abstract

A spindle motor capable of preventing deformation of felt is provided to prevent separation of a felt by forming a support groove or a support protrusion on a turntable. A spindle motor comprises a rotation shaft(130), a stator(140), a rotor(150), a turntable(160), a felt(190), and a support protrusion. The rotation shaft is pivotally installed in a base(120). The stator is fixed near the rotation shaft. The rotor is fixed in the rotation shaft, and is rotated by interaction with the stator. The turntable is fixed in the rotation shaft. A disk(50) is mounted on the turntable. The felt is installed in the turntable, and supports the disk. The support protrusion is formed in the turntable. An outer circumference of the felt is contacted in the support protrusion. The support protrusion prevents deformation of the felt.

Description

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

도 1은 종래의 스핀들 모터의 일부 단면도.1 is a partial cross-sectional view of a conventional spindle motor.

도 2a는 본 발명의 일 실시예에 따른 스핀들 모터의 단면도.2A is a cross-sectional view of a spindle motor in accordance with one embodiment of the present invention.

도 2b는 도 2a의 "A"부 확대도.2B is an enlarged view of a portion “A” of FIG. 2A.

도 3은 본 발명의 다른 실시예에 따른 스핀들 모터의 요부 확대도.Figure 3 is an enlarged view of the main portion of the spindle motor according to another embodiment of the present invention.

* 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 140 : 고정자130: shaft 140: stator

150 : 회전자 160 : 턴테이블150: rotor 160: turntable

170 : 센터가이드부재 175 : 부시170: center guide member 175: bush

180 : 탄성부재 190 : 펠트180: elastic member 190: felt

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

일반적인 CD(Compact Disk)는 정보가 기록되는 트랙과 트랙 사이의 간격이 1.7㎛인 반면, BD(Blu-Ray Disk)는 트랙과 트랙 사이의 간격이 0.7㎛이다.A typical CD (Compact Disk) has a space between tracks on which information is recorded and a track is 1.7 mu m, while a BD (Blu-Ray Disk) has a track between tracks and a track distance of 0.7 mu m.

그러므로, 트랙과 트랙 사이의 간격이 고밀도인 BD의 경우에는, CD에 비하여 더욱 견고하고 정밀하게 지지되어 회전되어야 한다. 이를 위하여, BD가 삽입되어 지지되는 센터가이드부재를 황동 가공물로 형성하고, 상기 센터가이드부재를 스프링으로 지지하여, 조심성능을 향상시킨 스핀들 모터가 개발되었는데, 이를 도 1을 참조하여 설명한다.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 having a BD guide is inserted into and supported by a brass workpiece, and the center guide member is supported by a spring to improve a careful performance. A spindle motor has been developed, which will be described with reference to FIG. 1.

도 1은 종래의 스핀들 모터의 일부 단면도이다.1 is a partial cross-sectional view of a conventional spindle motor.

도시된 바와 같이, 회전가능하게 설치된 회전축(11)에 회전자인 로터요크(13)가 고정되고, 로터요크(13) 상측의 회전축(11) 외주면에는 턴테이블(15)이 고정된다.As shown, the rotor yoke 13, which is a rotor, is fixed to the rotating shaft 11, which is rotatably installed, and the turntable 15 is fixed to the outer circumferential surface of the rotating shaft 11 above the rotor yoke 13.

턴테이블(15) 상측의 회전축(11) 외주면에는 황동 가공물인 센터가이드부재(17)와 부시(19)가 승강가능하게 결합된다. 턴테이블(15)과 센터가이드부재(17) 사이에는 스프링(21)이 마련되는데, 스프링(21)은 센터가이드부재(17)를 수직 및 수평방향으로 지지하여, 턴테이블(15)에 탑재된 디스크(50)의 중심이 회전축(11)의 중심과 일치하도록 탄성 지지한다.On the outer circumferential surface of the rotary shaft 11 above the turntable 15, the center guide member 17 and the bush 19, which are brass workpieces, are liftably coupled to each other. A spring 21 is provided between the turntable 15 and the center guide member 17. The spring 21 supports the center guide member 17 in the vertical and horizontal directions, thereby providing a disk mounted on the turntable 15 ( 50 is elastically supported so that its center coincides with the center of the rotation shaft 11.

그리고, 턴테이블(15)에는 디스크(50)가 접촉되어 지지되는 펠트(25)가 접착된다.And the felt 25 which the disk 50 contacts and is supported by the turntable 15 is adhere | attached.

상기와 같은 종래의 스핀들 모터는, 고속 회전시, 펠트(25)가 편심에 의한 원심력을 이기지 못하고 외측으로 밀려서 변형되는 단점이 있다. 특히, 디스크(50)의 상측에서 디스크를 눌러 지지하는 클램프(미도시)가, 도 1의 화살표 위치와 같이, 펠트(25)의 외측에 위치된 디스크(50)의 부위를 펠트(25)측으로 누르므로, 상 기 클램프에서 디스크(50)에서 작용하는 힘에 의하여 펠트(25)가 외측으로 더 밀려서 변형되는 단점이 있다.The conventional spindle motor as described above has a disadvantage in that the felt 25 is deformed by being pushed outward without the centrifugal force due to the eccentricity when rotating at a high speed. In particular, a clamp (not shown) for pressing and supporting the disk on the upper side of the disk 50 moves the portion of the disk 50 located outside the felt 25 to the felt 25 side, as shown by the arrow position in FIG. 1. Since the pressing, there is a disadvantage that the felt 25 is further pushed outward by the force acting on the disk 50 in the clamp is deformed.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 펠트가 변형되는 것을 방지할 수 있는 스핀들 모터를 제공함에 있다.The present invention has been made to solve the above problems of the prior art, to provide a spindle motor that can prevent the felt of the present invention is deformed.

상기 목적을 달성하기 위한 본 발명에 따른 스핀들 모터는, 회전가능하게 설치된 회전축; 상기 회전축 주위에 고정된 고정자; 상기 회전축에 고정되며 상기 고정자와 작용하여 회전하는 회전자; 상기 회전축에 고정되며 디스크가 탑재되는 턴테이블; 상기 턴테이블에 설치되며 상기 디스크가 접촉 지지되는 펠트; 상기 펠트가 밀려 변형되는 것을 방지하는 수단을 포함한다.Spindle motor according to the present invention for achieving the above object, the rotating shaft rotatably installed; A stator fixed around the axis of rotation; A rotor fixed to the rotation shaft and rotating in action with the stator; A turntable fixed to the rotating shaft and mounted with a disk; A felt installed on the turntable and supported by the disk; And means for preventing the felt from being pushed and deformed.

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 단면도이고, 도 2b는 도 2a의 "A"부 확대도이다.2A is a cross-sectional view of a spindle motor according to an embodiment of the present invention, and FIG. 2B is an enlarged view of portion “A” of FIG. 2A.

도시된 바와 같이, 본 실시예에 따른 스핀들 모터는 베이스(200)에 대하여 수직으로 하부측이 베이스(200)에 고정된 베어링하우징(110)을 가진다. 베어링하우징(110)의 내부에는 베어링(120)이 고정되고, 베어링(120)에는 회전축(130)의 일측이 지지되어 회전가능하게 설치된다.As shown, the spindle motor according to the present embodiment has a bearing housing 110 in which the lower side is fixed to the base 200 perpendicular to the base 200. The bearing 120 is fixed to the inside of the bearing housing 110, and one side of the rotating shaft 130 is supported on the bearing 120 to be rotatably installed.

베어링하우징(110)에는 고정자(140)가 고정되고, 회전축(120)에는 고정자(140)와 작용하여 회전하는 회전자(150)가 고정된다.The stator 140 is fixed to the bearing housing 110, and the rotor 150 that rotates by acting with the stator 140 is fixed to the rotation shaft 120.

고정자(140)는 베어링하우징(110)의 외주면에 고정된 코어(141)와 코어(141)에 권선된 코일(145)을 가지고, 회전자(150)는 베어링하우징(110)의 상측으로 노출된 회전축(120)의 외주면에 고정된 로터요크(151)와 로터요크(151)의 내주면에 고정되어 고정자(140)와 대향하는 마그네트(155)를 가진다. 그리하여, 코일(145)에 전류가 공급되면, 코일(145)과 마그네트(155) 사이에 형성되는 전자기력에 의하여 회전자(150)가 회전한다.The stator 140 has a core 141 fixed to the outer circumferential surface of the bearing housing 110 and a coil 145 wound on the core 141, and the rotor 150 is exposed to the upper side of the bearing housing 110. The rotor yoke 151 fixed to the outer circumferential surface of the rotating shaft 120 and the magnet 155 fixed to the inner circumferential surface of the rotor yoke 151 to face the stator 140 are provided. Thus, when a current is supplied to the coil 145, the rotor 150 is rotated by the electromagnetic force formed between the coil 145 and the magnet 155.

로터요크(151) 상측의 회전축(130) 외주면에는 디스크(50)가 탑재되는 턴테이블(160)이 결합된다. 그리고, 턴테이블(160) 상측의 회전축(130) 외주면에는 황동 가공물인 센터가이드부재(170)가 승강가능하게 설치되고, 센터가이드부재(170) 상측의 회전축(130) 외주면에는 황동 가공물인 부시(175)가 설치된다.The turntable 160 on which the disc 50 is mounted is coupled to the outer circumferential surface of the rotation shaft 130 above the rotor yoke 151. In addition, a center guide member 170, which is a brass workpiece, is provided on the outer circumferential surface of the rotary shaft 130 on the upper side of the turntable 160, and a bush 175 that is a brass workpiece is formed on the outer circumferential surface of the rotary shaft 130 on the upper side of the center guide member 170. ) Is installed.

센터가이드부재(170)의 외주면에 디스크(50)의 내주면이 삽입 지지되어 디스크(50)가 턴테이블(160)에 탑재되고, 부시(175)는 디스크(50)가 센터가이드부재(170)에 삽입되도록 안내한다.The inner circumferential surface of the disk 50 is inserted and supported on the outer circumferential surface of the center guide member 170 so that the disk 50 is mounted on the turntable 160, and the bush 175 has the disk 50 inserted into the center guide member 170. Guide as much as possible.

턴테이블(160)과 센터가이드부재(170) 사이에는 탄성부재(180)가 설치되는데, 탄성부재(180)는 센터가이드부재(170)의 중심이 회전축(130)의 중심과 일치하도록 센터가이드부재(170)를 수직 및 수평 방향으로 탄성 지지한다.An elastic member 180 is installed between the turntable 160 and the center guide member 170. The elastic member 180 includes a center guide member (ie, the center guide member 170 is aligned with the center of the rotation shaft 130). 170 is elastically supported in the vertical and horizontal directions.

센터가이부재(170)측을 향하는 턴테이블(160)의 상면에는 디스크(50)와 접촉하여 디스크(50)를 지지하는 링형상의 펠트(190)가 접착된다. 펠트(190)는 스핀들 모터의 회전시 디스크(50)가 미끄러지는 것을 방지한다.A ring-shaped felt 190 that adheres to the disk 50 and supports the disk 50 is adhered to the top surface of the turntable 160 facing the center guide member 170. The felt 190 prevents the disk 50 from slipping when the spindle motor rotates.

스핀들 모터가 고속으로 회전할 때 편심에 따른 원심력에 의하여 또는, 도 2a의 화살표 위치와 같이, 부시(175)측에서 디스크(50)측으로 하강하여 펠트(190) 외측의 디스크(50) 부위를 턴테이블(160)측으로 누르는 클램프에 의해 펠트(190)가 턴테이블(160)의 외측으로 밀려 변형될 수 있다.When the spindle motor rotates at a high speed, the centrifugal force due to the eccentricity or the position of the disc 50 outside the felt 190 is lowered from the bush 175 side to the disc 50 side by the centrifugal force according to the eccentricity or the arrow position of FIG. 2A. The felt 190 may be pushed out of the turntable 160 and deformed by the clamp pressed toward the 160.

본 실시예에 따른 스핀들 모터에는 펠트(190)가 밀려서 변형되는 것을 방지하는 수단이 마련된다.The spindle motor according to the present embodiment is provided with means for preventing the felt 190 from being pushed and deformed.

상기 수단은 턴테이블(160)의 상면 테두리부에 형성되며 펠트(190)의 외주면이 접촉 지지되는 링형상의 지지돌기(163)로 마련된다. 지지돌기(163)에 펠트(190)의 외주면이 접촉되므로 펠트(190)는 밀리지 않는 것이다.The means is formed in the upper edge portion of the turntable 160 is provided with a ring-shaped support protrusion 163, the outer peripheral surface of the felt 190 is in contact with the support. Since the outer circumferential surface of the felt 190 is in contact with the support protrusion 163, the felt 190 is not pushed.

도 3은 본 발명의 다른 실시예에 따른 스핀들 모터의 요부 확대도로서, 이를 설명한다.3 is an enlarged view illustrating main parts of a spindle motor according to another exemplary embodiment of the present invention.

도시된 바와 같이, 상기 수단은 턴테이블(260)의 상면 테두리부에 형성되며 펠트(190)가 삽입되어 지지되는 링형상을 이루는 지지홈(263)으로 마련된다. 펠트(190)는 지지홈(263)에 삽입되어 내주면 및 외주면이 동시에 접촉 지지되므로, 밀리는 현상이 더욱 방지된다.As shown, the means is provided with a support groove 263 formed in the upper edge portion of the turntable 260 and forming a ring shape in which the felt 190 is inserted and supported. Since the felt 190 is inserted into the support groove 263 and the inner circumferential surface and the outer circumferential surface are contacted and supported at the same time, the phenomenon of being pushed is further prevented.

이상에서 설명한 바와 같이, 본 발명에 따른 스핀들 모터는 턴테이블에 형성된 지지돌기에 펠트의 외주면이 접촉 지지되거나, 지지홈에 펠트의 내주면 및 외주면이 접촉 지지되므로, 펠트가 밀려서 변형되지 않는다. 따라서, 디스크는 펠트에 안정되게 지지되므로, 광픽업은 디스크의 정확한 부위에 정보를 기록하고 정확한 부위로부터 원하는 정보를 재생할 수 있다.As described above, in the spindle motor according to the present invention, since the outer circumferential surface of the felt is supported in contact with the support protrusion formed on the turntable, or the inner circumferential surface and the outer circumferential surface of the felt are supported in contact with the support groove, the felt is not deformed by being pushed. Therefore, since the disc is stably supported by the felt, the optical pickup can record information in the correct part of the disc and reproduce the desired information from the correct part.

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 (4)

회전가능하게 설치된 회전축;A rotating shaft rotatably installed; 상기 회전축 주위에 고정된 고정자;A stator fixed around the axis of rotation; 상기 회전축에 고정되며 상기 고정자와 작용하여 회전하는 회전자;A rotor fixed to the rotation shaft and rotating in action with the stator; 상기 회전축에 고정되며 디스크가 탑재되는 턴테이블;A turntable fixed to the rotating shaft and mounted with a disk; 상기 턴테이블에 설치되며 상기 디스크가 접촉 지지되는 펠트;A felt installed on the turntable and supported by the disk; 상기 펠트가 밀려 변형되는 것을 방지하는 수단을 포함하는 스핀들 모터.Means for preventing the felt from being pushed and deformed. 제 1 항에 있어서,The method of claim 1, 상기 수단은 상기 턴테이블에 형성되며 상기 턴테이블의 외측을 향하는 상기 펠트의 외주면이 접촉 지지되는 지지돌기인 스핀들 모터.The means is a spindle motor that is formed on the turntable is a support protrusion that the outer peripheral surface of the felt facing toward the outside of the turntable contact support. 제 1 항에 있어서,The method of claim 1, 상기 수단은 상기 턴테이블에 형성되며 상기 펠트가 삽입 지지되는 지지홈인 스핀들 모터.And said means is a support groove formed in said turntable and into which said felt is inserted and supported. 제 1 항 내지 제 3 항 중, 어느 한 항에 있어서,The method according to any one of claims 1 to 3, 상기 턴테이블 상측의 상기 회전축 외주면에는 센터가이드부재가 승강가능하게 설치되고,A center guide member is provided on the outer peripheral surface of the rotary shaft above the turntable so as to be lifted and lowered. 상기 센터가이드부재 상측의 상기 회전축 외주면에는 부시가 설치되며,A bush is installed on the outer circumferential surface of the rotating shaft above the center guide member, 상기 턴테이블과 상기 센터가이드부재 사이에는 상기 센터가이드부재의 중심이 상기 회전축의 중심과 일치하도록 지지하는 탄성부재가 설치된 스핀들 모터.A spindle motor is installed between the turntable and the center guide member to support the center of the center guide member to coincide with the center of the rotation shaft.
KR1020070087584A 2007-08-30 2007-08-30 Spindle motor KR20090022318A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010128820A2 (en) * 2009-05-08 2010-11-11 Lg Innotek Co., Ltd. Apparatus for rotating disk
KR101020802B1 (en) * 2009-05-22 2011-03-09 엘지이노텍 주식회사 Spindle motor
WO2011043586A2 (en) * 2009-10-08 2011-04-14 Lg Innotek Co., Ltd. Spindle motor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010128820A2 (en) * 2009-05-08 2010-11-11 Lg Innotek Co., Ltd. Apparatus for rotating disk
WO2010128820A3 (en) * 2009-05-08 2011-02-24 Lg Innotek Co., Ltd. Apparatus for rotating disk
CN102460915A (en) * 2009-05-08 2012-05-16 Lg伊诺特有限公司 Apparatus for rotating disk
US8566854B2 (en) 2009-05-08 2013-10-22 Lg Innotek Co., Ltd. Apparatus for rotating disk with improved anti-slip torque
US8943522B2 (en) 2009-05-08 2015-01-27 Lg Innotek Co., Ltd. Apparatus for rotating disk with improved anti-slip torque
KR101020802B1 (en) * 2009-05-22 2011-03-09 엘지이노텍 주식회사 Spindle motor
WO2011043586A2 (en) * 2009-10-08 2011-04-14 Lg Innotek Co., Ltd. Spindle motor
WO2011043586A3 (en) * 2009-10-08 2011-11-03 Lg Innotek Co., Ltd. Spindle motor
CN102648567A (en) * 2009-10-08 2012-08-22 Lg伊诺特有限公司 Spindle motor
US8726302B2 (en) 2009-10-08 2014-05-13 Lg Innotek Co., Ltd. Spindle motor

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