WO2013165103A1

WO2013165103A1 - Chucking device and spindle motor comprising same

Info

Publication number: WO2013165103A1
Application number: PCT/KR2013/003024
Authority: WO
Inventors: 이정훈; 박새롬
Original assignee: 주식회사 삼홍사
Priority date: 2012-04-30
Filing date: 2013-04-11
Publication date: 2013-11-07
Also published as: KR20130122101A; KR101352897B1

Abstract

A spindle motor, according to the present invention, comprises: a bearing housing; a rotary shaft which is rotatably supported by the bearing housing; a rotor which is fixed to the rotary shaft; a stator which is arranged on the inner surface of the rotor with a specific distance therebetween, and which is fixed to the outer circumferential surface of the bearing housing; and a chucking device, which is fixed to the rotary shaft, for fixing a disk, wherein the chucking device comprises a turntable, which is coupled to the rotary shaft and on which the disk is seated, an elevating member, which is arranged at an upper portion of the turntable so as to rise and fall vertically, for supporting the disk when the disk is seated on the table, a yoke member, which is fixed to the upper end of the rotary shaft, for supporting the elevating member so as to rise and fall and preventing the elevating member from separating, and an elastic force provision portion, which is integrally formed on the elevating member, for providing elastic force to the elevating member, thereby reducing the number of parts and simplifying the manufacturing process.

Description

Chucking device and spindle motor with same

The present invention relates to a disk drive chucking device and a spindle motor having the same.

In general, optical disc players such as LDP, CDP, CD-ROM and DVD-ROM players, DVD players, BDs, 3D players, etc., clamp a mounting hole formed through the center of the disc while loading the disc on the turntable by a loading mechanism. An apparatus for reproducing information recorded on a disk by an optical pickup unit which is clamped and clamped as a chuck, and which is moved in the radial direction while rotating the disk clamped to the chuck in one direction by a drive source of a spindle motor as a driving means.

The spindle motor maintains a fixed contact section between the bearing and the rotating shaft to rotatably support the rotating shaft, thereby maintaining a high degree of rotational characteristics, thereby requiring hard disk drives (HDD), optical disk drives (ODD) and other high speed rotations. Is widely used as a driving means of a recording medium.

Spindle motors that require such high speed rotation are required to be thinner and lighter to meet the development of electronic devices that are miniaturized every day.

Conventional spindle motors are disclosed in US 2007/0294712 A1 (December 20, 2007).

The prior art spindle motor disclosed in US 2007/0294712 A1 has a cylindrical housing, a shaft rotatably supported on the inner surface of the housing, a stator fixed to the outer surface of the housing, and a predetermined gap on the outer surface of the stator. And a rotor disposed and fixed to the shaft, and a chucking device disposed on an upper surface of the rotor and fixed to the rotating shaft.

Conventional chucking device is a cone member is fixed to the rotating shaft and formed of a resin material and formed in a cylindrical shape, a cone member formed in the axial direction on the upper side of the turn table and the slide portion is slidably moved on the rotating shaft, between the cone member and the turn table It is disposed in the space of the elastic member for supporting the cone member in the axial direction, and the yoke member is fixed to the upper side of the rotation axis to limit the axial movement of the cone member and formed of a magnetic material.

However, in the conventional spindle motor, since the elastic member is disposed between the cone member and the turntable in the form of a coil spring, the assembly process is complicated because the process of installing the elastic member is added. There is a growing problem.

In addition, the conventional spindle motor is provided on the turntable, the balance member for maintaining the balance of the turntable is formed of steel (steel) ball, there is a problem that the manufacturing cost increases, and noise and vibration may occur.

It is an object of the present invention to provide a chucking device and a spindle motor having the same that can be formed integrally on the turntable to improve assembly and reduce manufacturing costs.

Another object of the present invention is to provide a chucking device and a spindle motor having the same by reducing the manufacturing cost and minimizing noise and vibration when the motor is rotated by forming a balance ball built in the turntable to maintain the balance made of a resin material will be.

The problem to be solved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. .

In order to achieve the above object, the chucking device of the present invention is fixed to the rotating shaft and the disk is seated, the lifting and lifting arranged in the vertical direction on the upper side of the turn table to support when the disk is seated on the turn table A member, a yoke member fixed to an upper end of the rotating shaft to support the elevating member to be lifted and prevented from being separated, and an elastic force providing unit integrally formed with the elevating member to provide elastic force to the elevating member. It is characterized by including.

The turntable of the present invention includes a disk seating portion formed of a synthetic resin material and having a disk seated thereon, and a rotating shaft fixing portion integrally formed on an inner surface of the disk seating portion and fixed to a rotating shaft, and an outer peripheral surface of the rotating shaft fixing portion. A plurality of elastic force providing portion is formed at a predetermined interval on the.

The turn table of the present invention is characterized in that a plurality of balance balls are arranged in the circumferential direction to maintain the balance during the rotation of the ten table, the balance ball is characterized in that formed of synthetic resin material.

The elastic force providing portion of the present invention is characterized in that the upper end is formed in the shape of an elastic rib that is connected to the rotating shaft fixing portion and is formed to open in the outer direction toward the lower side to generate an elastic force while bending in the inner direction.

The elastic force providing unit of the present invention is connected to the rotating shaft fixing portion, the support ribs are formed in the inclined surface open in the outer direction toward the lower side and bend inward direction, and fixed to the inner surface of the support ribs to provide elastic force to the support ribs Characterized in that it comprises a tension bar.

The tension bar of the present invention is characterized in that one side is fixed to the outer surface of the rotating shaft fixing portion, the other side is fixed to the inner surface of the support rib, and formed of any one of a metal material, a rubber material, a resin material having an elastic force.

The elevating member of the present invention includes a sliding portion disposed to be slidably movable on the outer surface of the yoke member, a plurality of jaws extending from the outside of the sliding portion to elastically support the disk, and extending from a lower surface of the sliding portion to an outer surface of the elastic force providing portion. It characterized in that it comprises a sheet portion in contact.

The yoke member of the present invention has a cylindrical support portion whose inner surface is fixed to the rotation shaft and the elevating member is slidably supported on the outer surface, and has a ring shape extending outwardly from the upper end of the support portion to prevent the lifting of the elevating member. It characterized in that it comprises a departure prevention portion.

The spindle motor of the present invention includes a bearing housing, a rotating shaft rotatably supported by the bearing housing, a rotor fixed to the rotating shaft, a stator disposed at a predetermined gap on an inner surface of the rotor and fixed to an outer circumferential surface of the bearing housing; And a chucking device fixed to the rotating shaft to fix the disk, wherein the chucking device includes a turn table fixed to the rotating shaft and the disk seated thereon, and the disk is turned upward and downward in an upward direction of the turn table. A elevating member that supports when seated on a table, a yoke member that is fixed to an upper end of the rotary shaft to support the elevating member in a liftable manner, and prevents the elevating member from being separated, and is formed integrally with the elevating member to elevate the elevating member It characterized in that it comprises an elastic force providing unit for providing an elastic force to.

The chucking device of the present invention can be formed integrally to the turntable to improve the assembly and reduce the manufacturing cost.

In addition, the chucking device of the present invention is formed on the turntable to form a balance ball to maintain the balance made of a resin material, it is possible to reduce the manufacturing cost and to minimize the noise and vibration during the motor rotation.

1 is a cross-sectional view of a spindle motor according to an embodiment of the present invention.

2 is a cross-sectional view of a chucking device according to an embodiment of the present invention.

3 is a cross-sectional view of the disk seated in the spandle motor according to an embodiment of the present invention.

4 is a cross-sectional view of a chucking device according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be made based on the contents throughout the specification.

The spindle motor of the present invention can be applied not only to a spindle motor requiring high speed rotation but also to a low speed rotation motor, and to both a brushless DC motor or a DC motor.

1 is a cross-sectional view of a spindle motor according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the chucking device according to an embodiment of the present invention, Figure 3 is a disk in the chucking device according to an embodiment of the present invention It is a seated section.

1 to 3, a spindle motor according to an embodiment of the present invention is fixed to a bearing housing 10, a rotating shaft 50 rotatably supported by the bearing housing 10, and a rotating shaft 50. And a rotor 30 which is rotated together with the rotation shaft 50, a stator 40 disposed at a predetermined gap on the inner surface of the rotor 30 and fixed to an outer circumferential surface of the bearing housing 10, and fixed to the rotation shaft 50. And a chucking device 60 that is rotated together with the rotating shaft 50 and to which the disk 100 is fixed.

The bearing housing 10 is formed in a cylindrical shape in which an upper side is opened and a lower side is blocked, a bearing 52 is press-fitted to an inner circumferential surface thereof, and a base plate 12 is fixed to a lower outer circumferential surface thereof.

The base plate 12 fixedly supports the bearing housing 10 and the stator 40 as a whole, and may be manufactured in various shapes such that the base plate 12 may be fixedly installed in various disk drive devices in which the spindle motor is installed.

The base plate 12 is disposed below the stator 40, and the printed circuit board (PCB) 14 that applies a driving signal to the stator 40 is fixed by caulking or the like. The printed circuit board (PCB) 14 is supplied with a drive signal for controlling the spindle motor from the disk drive apparatus main body via, for example, a flexible flat cable (FFC).

The base plate 12 is preferably made of a lightweight material such as aluminum or an aluminum alloy or an iron-based alloy, but may be made of another metal material or synthetic resin. In this case, the base plate 12 may be integrated with the bearing housing 10 by insert injection or insert molding at the time of manufacturing the bearing housing 10 that is injection molded using a thermoplastic or thermosetting resin. .

In this embodiment, the bearing housing 10 and the base plate 12 can of course be integrated using the same resin.

The bearing 52 has a circular through hole in the center thereof, and the rotation shaft 50 is inserted into the through hole to be rotatably supported. A groove 54 is formed at the lower end of the rotation shaft 50, and a slit washer 56 is inserted in the groove 54 to prevent the rotation shaft 50 from rising when the rotation shaft 50 is rotated.

Slit washer 56 is seated on the inner diameter reduction portion 16 is formed to narrow the inner diameter on the lower side of the bearing housing 10 and the upper surface is disposed in a state locked to the lower surface of the bearing (52). Accordingly, the slit washer 56 is locked by the bearing 52, and the slit washer 56 is caught by the groove 54 of the rotary shaft 50 to prevent the rotary shaft 50 from being raised. Play a role.

In addition, the bottom surface of the bearing housing 10 is in contact with the lower surface of the rotating shaft 50 is provided with a support washer 18 for reducing the rolling resistance.

The bearing 52 may use, for example, an oilless bearing made of an oil-containing sintered metal, and has a cylindrical shape. That is, a metal bearing in which oil is infiltrated into the porous copper alloy (Brass system) may be used.

In addition, an oil splash prevention washer 58 is coupled to the bearing 52 to prevent oil filled in the bearing 52 from scattering.

The bearing housing 10 may be manufactured by an injection molding method using a thermosetting resin or a thermoplastic resin such as an engineering plastic material such as nylon 66 or polycarbonate (PC).

The stator 40 is a core 42 in which a plurality of sections are stacked from a ring-shaped body, a bobbin 44 made of an insulator and wrapped around the outer circumferential surface of the core 42, and wound around the bobbin 44. Coil 46.

Rotor 30 is one side is fixed to the rotation shaft 50, the rotor case 32 is rotated with the rotation shaft 50, and is mounted in the circumferential direction on the inner surface of the rotor case 32 and disposed facing the stator 40 And a magnet 34.

The rotor case 32 uses a porcelain forming material formed from a plurality of laminated laminations of, for example, a non-oriented electrical steel sheet as a back yoke for forming a magnetic circuit. In addition to the electrical steel sheet, the magnetic field forming material can be adopted as long as the magnetic core material has a low core loss and high permeability.

The rotor case 32 is formed in a substantially disk shape, the inner surface of which is bent downward at the edge of the rotary shaft fixing portion 36 and the rotary shaft fixing portion 36 fixed to the outer circumferential surface of the rotating shaft 50 in the form of a cylinder. It consists of a magnet mounting portion 38 to form a magnet 34 is mounted on its inner surface.

The rotating shaft fixing part 36 has a fixing hole 20 formed on the inner surface thereof and is fixed to the outer surface of the rotating shaft 50, and the rotating shaft fixing part 36 and the rotating shaft 50 are press-fitted, locked or welded in various ways. Can be fixed.

The chucking device 60 is fixed to the rotation shaft 50 and the turn table 62 on which the disk 100 is seated, and the upper and lower sides of the turn table 62 are disposed to be able to be lifted up and down so that the disk 100 is turned table. The elevating member 64 which contacts the opening 110 of the disc 100 to support the disc 100 when it is seated on the 62, and is fixed to the upper end of the rotating shaft 50 to elevate the elevating member 64. And a yoke member 66 for supporting the elevating member 64 and preventing the lifting member 64 from being detached.

The turn table 62 is formed of a resin material and is integrally connected to the inside of the disc seating portion 70 and the disc seating portion 70 on which the disc 100 is seated on an upper surface thereof, and fixed to an outer circumferential surface of the rotation shaft 50. It includes a rotating shaft fixing portion 72.

The disc seating portion 70 is provided with a recess 74 having an open lower surface in the circumferential direction, and the recess 74 has a plurality of balance balls 76 for maintaining balance when the turntable 62 rotates. .

In addition, a disc-shaped support plate 78 having a center opening is mounted on the bottom surface of the disc seating portion 70 to prevent an opening of the recess 74. At this time, the support plate 78 is fixed to the upper surface of the rotor case (32). And, the upper surface of the support plate 78 is equipped with a buffer member 80 for minimizing the resistance when the balance ball 76 rolls.

Since the plurality of balance balls 76 is used by mixing a synthetic resin material and a metal material, the weight of the balance ball 76 may be reduced compared to the case of forming only a metal material such as steel, and manufacturing cost may be reduced. In addition, since the balance ball of the resin material and the balance ball of the metal material are mixed, the noise or vibration generated when the balance ball collides can be reduced. That is, in the case of using the existing steel ball, the noise or vibration may increase when the steel balls are rubbed or collided with each other. The balance ball of the present embodiment is mixed with a synthetic resin material and a metal material, so that the balance ball made of metal and the balance ball made of resin material This bump can reduce the occurrence of noise or vibration.

* A rubber slip prevention member 82 is attached to an upper surface of the disc seating part 70 to prevent slippage of the disc 100 when the disc 100 is rotated.

The rotating shaft fixing portion 72 is integrally connected to the inner surface of the disc seating portion 70 by a connecting portion 84, and a fixing hole 86 is formed at the center thereof to press-fit, insert molding or the like to the outer circumferential surface of the rotating shaft 50. It is fixed by a method such as forming a separate locking portion.

In addition, an elastic force providing unit 90 which provides an elastic force when the elevating member 64 descends is integrally formed on the outer circumferential surface of the rotation shaft fixing unit 72.

The elastic force providing unit 90 has an upper end connected to the outer circumferential surface of the rotating shaft fixing unit 72 and having an inclination angle at an angle in a downward direction, and has an elastic rib shape that provides an elastic force while bending inwardly.

That is, the elastic force providing unit 90 is integrally formed on the outer circumferential surface of the rotation shaft fixing unit 72 by providing elastic force while bending in the inner direction when pressed in the outer direction.

As such, since the elastic force providing unit 90 which provides the elastic force to the elevating member 64 is integrally formed on the turn table 62, a separate elastic member such as a coil spring is unnecessary, so that the number of parts is reduced and the assembly process is performed. It can be shortened.

As shown in FIG. 4, the elastic force providing unit 120 according to another embodiment may support the plurality of ribs 122 protruding at a predetermined interval from the outer circumferential surface of the rotating shaft fixing part 72 and being bent inwardly. ) And a tension bar 124 integrally mounted to the inner surface of the support rib 122 to provide an elastic force.

Here, the support rib 122 is formed so as to have its own elastic force is connected to the outer circumferential surface of the rotating shaft fixing portion 72 and inclined downward in the lower direction, it is bent inward to push the outer side to provide the elastic force.

In addition, the tension bar 124 is to provide an elastic force to the support ribs 122 and extends outward from an upper end of the support part 126 fixed to the outer surface of the rotating shaft fixing part 72 and the support part 126. It is composed of an elastic portion 128 that is fixed to the inner surface of the support rib 122.

The tension bar 124 may be applied to a metal plate spring type, a rubber material may be applied, a synthetic resin material having an elastic force is also applicable.

The elevating member 64 includes a sliding portion 94 that is slidably disposed on an outer surface of the yoke member 66 and a plurality of jaws that extend from the outside of the sliding portion 94 to elastically support the disk opening 110. 96 and a sheet portion 98 extending from the lower surface of the sliding portion 94 and in contact with the outer surface of the elastic force providing portion 90.

The plurality of jaws 96 is formed in the shape of a beveled cone so that the upper end is connected to the sliding portion 94 and the outer diameter becomes wider toward the lower side to elastically support the inner surface of the disk 100 so that the disk is shaken or separated during rotation. prevent.

The seat portion 98 extends in a cylindrical shape on the lower side of the sliding portion 94, and an inclined surface is formed on the inner surface of the end portion in contact with the outer surface of the elastic force providing portion 90 to contact the outer surface of the elastic force providing portion 90. .

The yoke member 66 is formed in a cylindrical shape, the inner surface of which is fixed to the upper end of the rotation shaft 50, the outer surface of the guide portion 140 and the guide portion 140 is supported by the lifting member 64 to be slidably movable It is formed in the shape of a disk extending in the outward direction from the upper end of the lifting member 64 includes a departure prevention portion 142 to prevent the lifting member 64 is separated.

The yoke member 66 may be integrally molded to the turn table 62. That is, the yoke member 66 is integrally connected to the upper end of the rotation shaft fixing part 72 of the turn table 62, and the lifting member 64 is assembled to the outer circumferential surface of the yoke member 66.

In addition, the yoke member 66 may be joined to the ten table 62 by a method such as press fitting, bonding, ultrasonic welding, and thermal welding.

Looking at the process of seating the disk 100 on the turn table 62 in the chucking device according to an embodiment configured as described above, the force pushed by the disk 100 when the disk 100 is placed on the turn table 62 The lifting member 64 is lowered by this. That is, the inner surface of the opening 110 of the disk 100 is elastically supported by the plurality of jaws 96 formed on the outer surface of the elevating member 64, and the elevating member 64 is lowered. Then, the seat portion 98 of the elevating member 64 is lowered in contact with the outer surface of the elastic force providing portion 90 formed on the turn table 62, and is elevated by the elastic force generated by the elastic force providing portion 90. The member 64 is lowered in an elastic state.

At this time, the elastic force providing unit 90 is bent in the inward direction to retain the elastic force, the disk 100 is seated on the upper surface of the turn table 62 when the pressing force on the elevating member 64 is removed the elastic force providing unit ( The elevating member 64 is returned to its original position by the elastic force of 90.

Then, the chucking member is disposed on the upper surface of the disk 100 to fix the disk 100. At this time, a magnetic force acts between the yoke member 66 and the chucking member to fix the chucking member and the yoke member 66.

As described above, when the disk 100 is seated on the turn table 62, a current is supplied to the coil 46 to generate a rotating magnetic field, and the rotor may be caused by an electromagnetic force formed between the coil 46 and the magnet 34. 30) is rotated. At this time, the rotor case 38 is fixed to the rotary shaft 50, the rotary shaft 50 is rotated together, the chucking device 60 fixed to the rotary shaft 50 is rotated while the disc seated on the upper surface of the turn table 62 ( Rotate 100).

It will be described the assembly process of the spindle motor according to an embodiment of the present invention configured as described above.

First, the base plate 12 is pressed into the lower outer surface of the bearing housing 10 or fixed by insert molding or the like. Then, the printed circuit board (PCB) 14 that applies a drive signal to the stator 40 is fixed to the upper surface of the base plate 12 by caulking or the like. Then, the stator 40 is fixed to the upper outer surface of the bearing housing 10.

The bearing 52 is fixed to the inner surface of the bearing housing 10 by press fitting or the like, and the rotation shaft 50 is inserted into the inner surface of the bearing 52 to be rotatably supported. At this time, a slit washer 56 is inserted into the bearing housing 10 and fitted into the groove 54 formed in the lower surface of the rotating shaft 50.

Then, the rotor case 38 is fixed to the outer circumferential surface of the rotation shaft 50 by a method such as press fitting. Then, the magnet 34 fixed to the inner surface of the rotor case 38 is disposed with a predetermined gap on the outer circumferential surface of the stator 40.

Then, the turn table 62 is fixed to the outer circumferential surface of the rotation shaft 50. That is, the rotary shaft fixing part 72 of the turn table 62 is press-fitted into the outer circumferential surface of the rotary shaft 50, insert injection, fusion or bonding are fixed.

The assembly is completed by inserting the elevating member 64 above the rotating shaft 50 and fixing the yoke member 66 to the end of the rotating shaft 50.

At this time, the elastic force providing unit 90 is integrally formed on the turn table 62 to provide elastic force to the elevating member 64, thereby eliminating the need to install an elastic member such as a coil spring, thereby improving assembly performance. As a result, the number of parts can be reduced.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

The present invention is applied to an optical disk player to chuck a disk, it is possible to reduce the number of parts compared to the existing chucking device can reduce the manufacturing cost, can be improved in assembly, excellent in terms of economic, various optical disk Applicable to the player.

Claims

A turn table fixed to a rotating shaft and seated with a disk;

An elevating member disposed on the upper side of the turn table in an upward and downward direction to support the disc when the disc is seated on the turn table;

A yoke member which is fixed to an upper end of the rotating shaft to support the lifting member to be liftable and prevent the lifting member from being separated; And

A chucking device comprising an elastic force providing unit integrally formed in the elevating member to provide an elastic force to the elevating member.
The method of claim 1,

The turn table includes a disk seating portion formed of a synthetic resin material and having a disk seated thereon, and a rotating shaft fixing portion integrally formed on an inner surface of the disk seating portion and fixed to a rotating shaft.

Chucking device, characterized in that a plurality of elastic force providing portion is formed at a predetermined interval on the outer peripheral surface of the rotating shaft fixing portion.
The method of claim 1,

The turn table is arranged in the circumferential direction a plurality of balance balls to maintain the balance during the rotation of the ten table,

The balance ball is a chucking device, characterized in that the balance ball made of a synthetic resin material and the balance ball made of a metal material is used.
The method of claim 2,

The elastic force providing unit is a chucking device, characterized in that the upper end is connected to the rotating shaft fixed portion is formed in the form of an elastic rib to be formed in the outer direction toward the lower side to generate an elastic force while bending inwardly.
The method of claim 2,

The elastic force providing portion is formed in the inclined surface of the upper end is connected to the rotating shaft fixing portion toward the lower side toward the lower side and capable of bending in the inner direction,

And a tension bar fixed to an inner surface of the support rib to provide an elastic force to the support rib.
The method of claim 5,

The tension bar is a chucking device, characterized in that one side is fixed to the outer surface of the rotating shaft fixing portion, the other side is fixed to the inner surface of the support rib, formed of any one of a metal material, a rubber material, a resin material having an elastic force.
The method of claim 1,

The elevating member is a sliding portion disposed to be slidably movable on the outer surface of the yoke member;

A plurality of jaws extending from the outside of the sliding portion to elastically support the disk;

And a sheet portion extending from the lower surface of the sliding portion and contacting the outer surface of the elastic force providing portion.
The method of claim 7, wherein

The yoke member has a cylindrical support portion having an inner surface fixed to a rotating shaft and a lifting member slideably supported on an outer surface thereof, and a ring-shaped separation preventing extension of the lifting member to extend outward from an upper end of the support portion. A chucking device comprising a portion.
A bearing housing, a rotating shaft rotatably supported by the bearing housing, a rotor fixed to the rotating shaft, a stator disposed at a predetermined gap on an inner surface of the rotor and fixed to an outer circumferential surface of the bearing housing, and fixed to the rotating shaft A chucking device for fixing the disk,

The chucking device includes a turn table fixed to the rotation shaft and the disk seated;

An elevating member disposed on the upper side of the turn table in an upward and downward direction to support the disc when the disc is seated on the turn table;

A yoke member which is fixed to an upper end of the rotating shaft to support the lifting member to be liftable and prevent the lifting member from being separated; And

And an elastic force providing unit integrally formed with the elevating member to provide an elastic force to the elevating member.
The method of claim 9,

The turn table includes a disk seating portion formed of a synthetic resin material and having a disk seated thereon, and a rotating shaft fixing portion integrally formed on an inner surface of the disk seating portion and fixed to a rotating shaft.

Spindle motor, characterized in that a plurality of elastic force providing portion is formed at a predetermined interval on the outer peripheral surface of the rotating shaft fixing portion.
The method of claim 9,

The turn table is arranged in the circumferential direction a plurality of balance balls to maintain the balance during the rotation of the ten table,

The balance ball is a spindle motor, characterized in that formed of a synthetic resin material.
The method of claim 9,

The elastic force providing unit is a spindle motor, characterized in that the upper end is connected to the rotating shaft fixed portion is formed in the form of elastic ribs to be formed in the outer direction toward the lower side to bend inwardly to generate an elastic force.
The method of claim 9,

The elevating member is a sliding portion disposed to be slidably movable on the outer surface of the yoke member;

A plurality of jaws extending from the outside of the sliding portion to elastically support the disk;

And a seat portion extending from a bottom surface of the sliding portion and contacting an outer surface of the elastic force providing portion.
The method of claim 13,

The yoke member has a cylindrical support portion having an inner surface fixed to a rotating shaft and a lifting member slideably supported on an outer surface thereof, and a ring-shaped separation preventing extension of the lifting member to extend outward from an upper end of the support portion. Spindle motor comprising a portion.
The method of claim 14,

The yoke member is a spindle motor, characterized in that any one of a magnetic material or a metal material to which the magnetic force of the magnet is applied.