KR20020051149A - A turntable assembly of disc player - Google Patents

Abstract

PURPOSE: A turn table assembly of a disk player is provided to minimize a gap between a central coupling hole of a disk and a guide unit of a turn table when mounting the disk on the turn table, thereby minimizing eccentricity when the disk is rotated. CONSTITUTION: A spindle motor(110) having a pivot(112) supplies a driving power for rotating a disk(100). A turn table(120) mounts the disk by inserting the pivot into an axis groove(121) and by coupling a central coupling hole(102) of the disk with a guide unit(122) formed around the axis groove. A clamper(130) installed on top of the turn table clamps the disk. The clamper has a magnet(133). A yoke member(127) is installed on the turn table corresponding to a position of the magnet. When the disk is mounted between the clamper and the turn table, the disk is fixed by a magnetic force.

Description

A turntable assembly of disc player

The present invention relates to a tentable assembly for rotating a disc, and more particularly, to a turntable assembly of a disc player whose structure is improved so that the eccentricity of the disc is automatically corrected when the disc is mounted on the turntable.

In a disc player for reproducing information recorded on a disc, such as a CD or CD-ROM driver, a spindle motor is equipped with a turntable assembly for rotating the disc at high speed.

1 is a schematic cross-sectional view showing a turntable assembly of a conventional disc player. In the conventional turntable assembly, a rotating shaft 11 of the spindle motor 10 is fitted into a shaft groove 21 formed at a central portion thereof, It has an annular guide portion 22 formed around the turntable 20, the guide portion 22 is fitted into the center engagement hole 43 of the disk 40, the shaft groove 21 and the guide portion 22 The magnet 25 is inserted into the guide groove 24 formed between the and the upper portion to correspond to the turntable 20 is clamped to the disk 40 and provided to correspond to the magnet 25 And a clamper 30 having a yoke member 31.

In the turntable assembly of a conventional disc player in which the guide part 22 is integrated as described above, when the disc 40 is mounted around the guide part 22, the guide part 22 and the center coupling hole 43 are provided. The gap G is formed between the gaps. In the gap G, the tolerance of the inner diameter of the center coupling hole 43 of the disk 40 is typically 15 + 0.1 mm for compatibility management of variously manufactured disks, whereas the guide portion of the turntable 20 22) is generated because it is managed to 15mm or less. The gap G generated as described above is a cause of eccentricity when the disk 40 is rotated. In particular, a high speed CD-ROM driver or the like has a problem in that the disk player is adversely affected by the deepening of the vibration and thus the reliability is lowered. .

The present invention has been made to solve the above problems, the structure is to minimize the eccentricity during the rotation of the disk by minimizing the gap generated between the center coupling hole of the disk and the guide of the turntable when mounting the disk on the turntable The object is to provide an improved turntable assembly for a disc player.

1 is a cross-sectional view of a turntable assembly of a disc player according to the related art;

2 is an exploded cross-sectional view of a turntable assembly of a disc player according to the present invention;

3 is a cross-sectional view of a disk mounted on the turntable of the turntable assembly of the disc player according to the present invention;

4 is a plan view of a turntable of the turntable assembly of the disc player according to the present invention.

<Description of main part of drawing>

100 ... disc 102 ... center mating hole

110 ... spindle motor 120 ... turntable

122.Guide section 125 ... Tension rib

130 ... clamper

In order to achieve the above object, a turntable assembly of a disc player according to the present invention includes a turntable in which a rotating shaft of a spindle motor is fitted into an axial groove formed at a center thereof, and a guide portion formed in a circumferential direction around the axial groove is fitted into a center coupling hole of the disc. ; In the turntable assembly of the disc player comprising a clamper installed on the top of the turntable to secure the disk, the guide portion is made of a tension rib having an opening in which the inner side is hollow and the lower side opening the guide portion The disk is elastically biased in the radial direction by the tension rib when the disk is fitted.

In addition, the tension rib is divided in the circumferential direction is characterized in that the tension in the radial direction can act freely.

Hereinafter, a turntable assembly of a disc player according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, a turntable assembly of a disc player according to the present invention includes a spindle motor 110 having a rotating shaft 112 for supplying a driving force for rotating the disc 100; The rotating shaft 112 is fitted into the shaft groove 121 formed in the center, and the center coupling hole 102 of the disk 100 is coupled to the annular guide portion 122 formed around the shaft groove 121 to form a disk. A turntable 120 adapted to be mounted; And a clamper 130 installed on the turntable 120 to clamp the disk 100.

In addition, the clamper 130 is provided with a magnet 133 and the yoke member 127 is provided on the turntable 120 at a position corresponding to the magnet 133, so that the clamper 130 and the turntable 120 are provided. The disk 100 can be fixed by the magnetic force when the disk 100 is mounted therebetween. In addition, the positions of the magnet 133 and the yoke member 127 may be changed to include the magnet 133 on the turntable 120 and the yoke member 127 on the clamper 130.

Meanwhile, as shown in FIG. 3, the guide part is a tension rib 125 having an opening 124 having a hollow inside and an opening 124 downward. When the tension rib 125 receives a force toward the inner hollow side, the tension rib 125 receives elasticity outwardly (in the direction of the arrow in FIG. 3) by reaction. Therefore, when the inner peripheral surface of the center coupling hole 102 is in contact with the lower outer surface of the tension rib 125 when the disk 100 is mounted on the turntable 120, due to the elastic force of the tension rib 125 The disk 100 is elastically biased in the radial direction.

4 is a partial plan view of the turntable 120, which shows that the tension ribs 125 are divided in the circumferential direction. In this case, since the tension rib 125 does not act in the circumferential direction, the tension rib 125 may freely exert the tension rib in the radial direction when the disc 100 is mounted. That is, even if the disc 100 has a tolerance in the center coupling hole 102, the outer peripheral surface of the tension rib 125 is in close contact with the inner diameter of the center coupling hole 102 by its elastic force.

As such, the gap G generated by the inner diameter tolerance of the center coupling hole 102 of the disk 100 and the outer diameter tolerance of the guide 122 may not be generated, thereby minimizing the occurrence of eccentricity when the disk is rotated. .

As described above, according to the turntable assembly of the disc player according to the present invention, when the disc is mounted on the turntable, the gap G between the center coupling hole 102 of the disc and the guide part 122 of the turntable is the tension rib 125. Eccentricity can be minimized during high-speed rotation of the disc, and the reliability of the disc player can be improved by suppressing vibration in a high speed CD-ROM driver.

Claims (2)

A turntable in which a rotating shaft of the spindle motor is fitted into the shaft groove formed at the center, and the guide portion formed in the circumferential direction around the shaft groove is fitted into the center coupling hole of the disk; In the turntable assembly of the disc player, comprising: a clamper installed on the turntable to secure the disc; The guide portion is made of a tension rib having an inner side of the hollow and having an opening opening downward, so that the disc is elastically biased in the radial direction by the tension rib when the disc is fitted to the guide portion. Turntable assembly of the disc player. The method of claim 1, wherein the tension rib, A turntable assembly of a disc player, characterized in that it is divided in the circumferential direction so that the tension in the radial direction can freely act.