JP2008305460A - Turntable - Google Patents

Abstract

The disk is elastically held so that the center of the disk coincides with the center of the turntable regardless of the inner diameter of the clamping area of the disk and the rotational speed of the turntable.
A turntable 150 has a rotating shaft fixed to an inner peripheral surface, a coupling portion 151 into which a disk is inserted into an outer peripheral surface, and a table on which a disk is mounted, extending outward from the outer peripheral surface of the coupling portion. A first claw 157a and a second claw 158b that elastically support the disk by contacting the disk 154 and the clamping area of the disk, from the center of the rotating shaft to the outer surface of the first claw that contacts the clamping area of the disk Is made longer than the distance from the center of the rotating shaft to the outer surface of the second claw that contacts the clamping area of the disc.
[Selection] Figure 3

Description

  The present invention relates to a turntable.

  The recording medium drive is an apparatus for recording data on the recording medium and reproducing the data recorded on the recording medium.

  The recording medium drive is provided with a turntable on which the recording medium is seated, and a spindle motor for rotating the turntable is disposed.

  The present invention is for providing a turntable.

  The turntable according to the present invention has a rotating shaft fixed to the inner peripheral surface, a coupling portion in which a disk is inserted into the outer peripheral surface, a table portion that is formed to extend outward from the outer peripheral surface of the coupling portion, and on which the disc is mounted, The claw includes a first claw and a second claw that elastically support the disk in contact with the disk clamping area. The distance from the center of the rotation axis to the outer surface of the first claw that contacts the disk clamping area is determined by the rotation axis. Longer than the distance from the center of the disk to the outer surface of the second claw contacting the clamping area of the disc.

  The turntable according to the present invention can elastically support the disk so that the center of the disk coincides with the center of the turntable regardless of the inner diameter of the clamping region of the disk and the rotational speed of the turntable.

  Further, the first claw, which is deformed by the size of the inner diameter of the disk and the turntable rotating at a high speed, has a relatively flexible elastic force, so that the durability is improved.

  Hereinafter, a turntable according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a sectional view of a recording medium drive adopting a turntable according to an embodiment of the present invention.

  As shown in FIG. 1, the recording medium drive is provided in a cylindrical shape with an open upper surface, and has a bearing housing 110 erected on a base 200, and a bearing 115 is installed inside the bearing housing 110. .

  The lower side of the rotating shaft 120 is inserted into and supported by the bearing 115, and the upper side of the rotating shaft 120 is exposed above the bearing housing 110.

  A stator 130 is fixed to the outer peripheral surface of the bearing housing 110, and a rotor 140 is fixed to the rotating shaft 120 exposed on the upper side of the bearing housing 110.

  The stator 130 has a core 131 fixed to the outer peripheral surface of the bearing housing 110 and a coil 135 wound around the core 131.

  The rotor 140 has a cylindrical shape with an open bottom surface and is fixed to the rotating shaft 120. The rotor yoke 141 covers the stator 130, and the magnet 145 is attached to the inner peripheral surface of the rotor yoke 141 and faces the core 131. Have

  When an external power supply is supplied to the coil 135, the rotating shaft 120 is rotated while the rotor 140 is rotated by the action of the electric field generated by the coil 135 and the magnetic field generated by the magnet 145.

  A turntable 150 is inserted and fixed to the rotary shaft 120 on the upper side of the rotor 140, and the disk 50 is mounted on the turntable 150 and elastically supported.

  The turntable 150 according to the embodiment of the present invention is provided so that the disks 50 having various sizes of inner diameter can be appropriately elastically supported without damage to the turntable 150.

  When the turntable 150 rotates at a high speed, the center of the disk 50 is prevented from deviating from the center of the turntable 150 beyond a set value due to the eccentricity of the disk 50 itself.

  FIG. 2 is a perspective view of a turntable according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the line II of FIG.

  As illustrated, the turntable 150 includes a coupling portion 151, a table portion 154, and a plurality of claws 156.

  The coupling portion 151 is provided in the form of a tube, and the rotating shaft 120 is pushed into and fixed to the inner peripheral surface. The outer peripheral surface of the coupling portion 151 is formed so as to be inclined away from the center of the rotating shaft 120 as it goes downward, but this allows the disk 50 to descend stably along the outer peripheral surface of the coupling portion 151. It is to do.

  A ring-shaped recess 151a can be formed between the inner peripheral surface and the outer peripheral surface of the coupling portion 151 as necessary. A metal piece (not shown) or a clamping magnet (not shown) is fixed to the recess 151a.

  The table portion 154 extends outward from the outer peripheral surface of the coupling portion 151 to form a ring shape, and the disk 50 is mounted thereon.

  The claw 156 includes a plurality of first claws 157 a to 157 c and a plurality of second claws 158 a to 158 c, and the first and second claws 157 a to 157 c and 158 a to 158 c are respectively formed on the outer surface of the coupling portion 151.

  More specifically, a plurality of interconnected space portions 153 are formed on the outer surface of the coupling portion 151 and the inner portion of the table portion 154, and the first claw 157a to 157c and the second claw 158a to 158c are formed in each space portion 153. Each is formed.

  At this time, the upper ends of the first and second claws 157a to 157c and 158a to 158c are integrally formed with the coupling portion 151, and the lower step portion is located in a space portion 153 formed on the table portion 154 side. (Cantilever) form.

  The first and second claws 157a to 157c and 158a to 158c are also formed to be inclined in substantially the same form as the outer peripheral surface of the coupling portion 151, and the outer surface on the lower step side is the inner peripheral surface of the disk 50, that is, the clamp. Contact the ping area.

  In the turntable according to the present embodiment, a claw 156 integrally formed with the coupling portion 151 is disclosed, but the claw 156 may be installed extending from the rotor yoke 141. In addition, the claw 156 may be installed with a spring so as to have elasticity.

  However, FIGS. 1 to 3 show an example in which the claw 156 is integrally formed with the coupling portion 151 in order to explain the characteristics of the claw 156.

  In the turntable according to the present embodiment, the first claw 157a to 157c and the second claw 158a to 158c are formed to have different characteristics.

  More specifically, the first and second claws 157a to 157c and 158a to 158c are formed at equal intervals in the coupling portion 151, respectively. At this time, the second claws 158a, 158b, and 158c are positioned between the first claws 157a and 157b, 157b and 157c, and 157c and 157a, which are adjacent to each other.

  The distance (L1) from the center (O) of the coupling portion 151 to the outer surface of the first claw 157a to 157c contacting the clamping area of the disc 50 is determined by clamping the disc 50 from the center (O) of the coupling portion 151. It is formed longer than the distance (L2) to the outer surface of the second claw 158a to 158c in contact with the region.

  More specifically, when the inner diameter of the clamping area of the disk 50 is set to 15.00 mm to 15.15 mm, the outer surface of the first claw 157a to 157c that contacts the clamping area of the disk 50 from the center (O) of the coupling portion 151. Distance (L1) is 7.575 mm to 7.600 mm, and the distance (L2) from the center (O) of the coupling portion 151 to the outer surface of the second claw 158a to 158c that contacts the clamping region of the disk 50 ) Is provided at 7.500 mm to 7.525 mm.

  The thickness (t1) between the inner surface and the outer surface of the first claw 157a to 157c is set to be thinner than the thickness (t2) between the inner surface and the outer surface of the second claw 158a to 158c. That is, the rigidity of the second claw 158a to 158c is provided larger than the rigidity of the first claw 157a to 157c.

  The operation of elastically supporting the disk 50 on the turntable 150 according to the present invention will be described.

  First, it is assumed that the inner diameter of the clamping area of the disk 50 mounted and supported on the turntable 150 is 15.00 mm, that is, ½ of the inner diameter of the clamping area of the disk 50 is 7.5 mm.

  In this case, the distance (L1) from the center (O) of the coupling portion 151 to the first claw 157a to 157c and the distance (L2) from the center (O) of the coupling portion 151 to the second claw 158a to 158c are the disc 50. Therefore, the outer surfaces of the first claw 157a to 157c and the second claw 158a to 158c both come into contact with the clamping area of the disk 50 to elastically support the disk 50.

  At this time, since the distance (L1) from the center (O) of the coupling portion 151 to the first claw 157a to 157c is long, the first claw 157a to 157c is brought into contact with the clamping region of the disk 50. 157a to 157c are deformed relatively much. However, since the first claws 157a to 157c are thin and have a relatively soft elastic force, the elastic force does not decrease due to plastic deformation.

  Since the distance (L2) from the center (O) of the coupling portion 151 to the second claw 158a to 158c is short, when the second claw 158a to 158c is brought into contact with the clamping region of the disk 50, the second claw 158a. ˜158c is relatively slightly deformed. However, since the first claws 157a to 157c are thick and have high rigidity, they support the disk 50 firmly.

  In summary, the first claw and the second claw 157a to 157c and 158a to 158c elastically support the disk 50 when the disk 50 having a small inner diameter is inserted and when the turntable 150 stops and rotates at a low speed. The center of the disk 50 is made to coincide with the center of the turntable 150.

  Even when the turntable 150 rotates at a high speed and the center of the disk 50 tends to deviate from the center of the turntable 150 due to the eccentricity of the disk 50 itself, the first claw and the second claw 157a to 157c, 158a to 158a. 158 c elastically supports the disk 50 so that the center of the disk 50 coincides with the center of the turntable 150.

  Next, it is assumed that the inner diameter of the clamping area of the disk 50 mounted and supported on the turntable 150 is 15.15 mm, that is, ½ of the inner diameter of the clamping area of the disk 50 is 7.575 mm.

  In this case, the distance (L1) from the center (O) of the coupling portion 151 to the first claw 157a to 157c is longer than ½ of the inner diameter of the clamping region of the disk 50, and the center (O ) To the second claw 158a to 158c (L2) is shorter than ½ of the inner diameter of the clamping area of the disk 50.

  Accordingly, when the turntable 150 stops and rotates at a low speed, the disk 50 is elastically supported by the first claw 157a to 157c. That is, when the turntable 150 stops and rotates at a low speed, the disk 50 is elastically supported only by the first claw 157a to 157c, but the disk 50 is supported only by the first claw 157a to 157c. The center of the disk 50 coincides with the center of the turntable 150.

  When the turntable 150 rotates at a high speed, the disk 50 overcomes the elastic force of the first claw 157a to 157c due to the eccentricity of the disk 50 itself, and tends to deviate from the center of the turntable 150.

  However, if the center of the disk 50 deviates from the center of the turntable 150 beyond the set value, the disk 50 is elastically supported by the second claw 158a to 158c having high rigidity, and the center of the disk 50 is the center of the turntable 150. Can't get out of the center. At this time, the first claw 157a to 157c is relatively deformed, but the first claw 157a to 157c is flexible and is not damaged.

  Since the turntable 150 is generally rotated at a high speed of 10,500 rpm or higher, the disk support performance at a high speed must be excellent, and it must be usable at a high speed for a long time.

  Accordingly, the recording medium drive according to the embodiment can elastically support the disk 50 within the set value regardless of the size of the inner diameter of the disk 50 and the rotation speed of the turntable 150. And since the 1st claw 157 deform | transformed relatively much has a comparatively flexible elastic force, durability improves.

  FIG. 4 is a diagram illustrating a turntable 150 according to another embodiment.

  In the turntable 150 according to another embodiment, the first claw 157a to 157c and the second claw 158a to 158c may be formed to have different widths instead of thickness, and the rigidity may be adjusted.

  For example, the width (w1) of the first claw 157a to 157c is narrower than the width (w2) of the second claw 158a to 158c. Therefore, the rigidity of the second claw 158a to 158c is provided larger than the rigidity of the first claw 157a to 157c.

  FIG. 5 is a view showing a turntable 150 according to still another embodiment.

  In the turntable 150 according to another embodiment, the first claw 157a to 157c and the second claw 158a to 158c may be formed to have different lengths, and the rigidity may be adjusted.

  For example, the lengths of the first claws 157a to 157c are shorter than the lengths of the second claws 158a to 158c. Therefore, the rigidity of the second claw 158a to 158c is provided larger than the rigidity of the first claw 157a to 157c.

  As described above, when a disk having a small inner diameter is inserted, the turntable according to the present invention has a distance from the center of the turntable to the outer surface in contact with the disk regardless of the rotation speed of the turntable. The disc is elastically supported by the first claw 157a to 157c and the second claw 158a to 158c having a short distance from the center of the turntable to the outer surface in contact with the disc.

  When a disk with a large inner diameter is inserted, when the turntable stops and rotates at a low speed, the disk is elastically supported by the first claw 157a to 157c, and when the turntable rotates at a high speed. The disc is elastically supported by the first and second claws 157a to 157c and 158a to 158c.

  The first claw 157a to 157c may have a smaller rigidity than the second claw 158a to 158c.

  The first claw 157a to 157c may be thinner than the second claw 158a to 158c.

  The first claw 157a to 157c may be narrower than the second claw 158a to 158c.

  The first claw 157a to 157c may be shorter than the second claw 158a to 158c.

  On the other hand, in the present embodiment, it is disclosed that the first claw 157a to 157c and the second claw 158a to 158c have different rigidity, but the first claw 157a to 157c and the second claw 158a to 158c have rigidity. Can be the same.

  In addition, the first claw 157a to 157c may have higher rigidity than the second claw 158a to 158c.

1 is a cross-sectional view of a recording medium drive adopting a turntable according to an embodiment of the present invention. It is a perspective view of a turntable according to an embodiment of the present invention. It is the II sectional view taken on the line of FIG. It is a figure which shows the turntable by other embodiment of this invention. It is a figure which shows the turntable by other embodiment of this invention.

Explanation of symbols

50 Disc 110 Bearing housing 115 Bearing 120 Rotating shaft 130 Stator 131 Core 135 Coil 140 Rotor 141 Rotor yoke 145 Magnet 150 Turntable 151 Joint portion 154 Table portion 156 Claw 200 Base

Claims (9)

A coupling part in which the rotation shaft is fixed to the inner peripheral surface and the disc is inserted into the outer peripheral surface;
A table portion that is formed to extend outward from the outer peripheral surface of the coupling portion, and on which the disk is mounted,
A first claw and a second claw that elastically support the disk in contact with a clamping region of the disk;
The distance from the center of the rotating shaft to the outer surface of the first claw that contacts the clamping region of the disc is the distance from the center of the rotating shaft to the outer surface of the second claw that contacts the clamping region of the disc. Turntable characterized by longer length.   The turntable according to claim 1, wherein a thickness of the first claw is thinner than a thickness of the second claw.   The turntable according to claim 1, wherein a width of the first claw is narrower than a width of the second claw.   The turntable according to claim 1, wherein a length of the first claw is shorter than a length of the second claw.   The turntable according to claim 1, wherein the first claw and the second claw are formed at equal intervals in the coupling portion.   The turntable according to claim 1, wherein three each of the first claw and the second claw are formed.   2. The turntable according to claim 1, wherein a distance from a center of the rotating shaft to an outer surface of the first claw that contacts a clamping region of the disk is 7.575 mm to 7.6 mm.   2. The turntable according to claim 1, wherein a distance from a center of the rotating shaft to an outer surface of the second claw that contacts a clamping region of the disk is 7.5 mm to 7.525 mm.   The turntable according to claim 1, wherein the first claw and the second claw are integrally formed with the coupling portion.

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