JP2002017064A - Motor and optical disc apparatus having motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which can prevent lubricating oil from leaking out of a bearing while a distance between a reference plane for the attachment of the motor and the chucking plane of an optical disc is reduced and avoid the wear of the chucking part, by preventing a turntable and the bearing from being brought into direct contact with each other. SOLUTION: This motor 10 has a stator 22 and a rotor 20 turned relatively to the stator 22. A bearing 72 supports a shaft 40 with lubricating oil. A lubricating oil leakage preventive member 76 for preventing the lubricating oil of the bearing 72 from leaking into a turntable 24 side is provided between the turntable 24 and the bearing 72. A thrust bearing 74 for preventing the turntable 24 and the bearing 72 from being brought into direct contact with each other is provided between the turntable 24 and the bearing 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
OM (read only memory using compact disk)
The present invention relates to a motor for mounting and rotating a disk-shaped information recording medium such as an optical disk, and an optical disk apparatus having the motor.

[0002]

2. Description of the Related Art As a motor for continuously rotating an optical disk of this kind, there is a motor as shown in FIG. The motor 1000 has a rotor 1001 and a stator 1002. The rotor 1001 is a turntable 1003,
It has a rotor yoke 1004, a driving magnet 1005, and a shaft 1006. The stator 1002 includes a stator substrate 1007, a housing 1008, a coil 10
09. The shaft 1006 is connected to the housing 1008
Is rotatably supported by the bearing 1010. The turntable 1003 detachably chucks the optical disk 1011. The end 1012 of the shaft 1006 is hemispherical, and the end 1012 is
Are supported rotatably. The bearing 1010 is
If a ball bearing is used, the cost is high, a preload is required, and the structure is complicated. Therefore, a sintered bearing is used.

[0003]

However, the structure of the motor 1000 has the following problems. The stator substrate 1007 side of the stator 1002 serves as a reference surface 1014 for mounting the motor. The rotor yoke 1004 of the rotor 1001 is located above the reference surface 1014 for mounting and between the stator substrate 1007 and the turntable 1003. ing. That is, the turntable 1003 is located further above the rotor yoke 1004. Therefore, the distance L between the mounting reference surface 1014 and the chucking surface 1015 of the optical disk 1011 increases. If this distance L is large,
When the optical disk 1011 is eccentric or the like, the influence of the runout of the optical disk 1011 increases. That is, if the distance L is large, the dimensional error of the distance L is likely to increase, and the vibration due to the surface runout when the optical disk is placed on the turntable and rotated is further increased. Therefore, there is a disadvantage that the optical pickup 1020 for reading the information on the optical disk 1011 is liable to be harmful to reading the information on the optical disk 1011. Therefore, the present invention solves the above-mentioned problems, prevents the leakage of lubricating oil from the bearing while shortening the distance between the reference surface for mounting the motor and the chucking surface of the optical disk, and prevents the direct contact between the turntable and the bearing. It is an object of the present invention to provide a motor that can prevent abrasion of a chucking portion by preventing contact.

[0004]

The invention according to claim 1 is a motor having a stator and a rotor rotating with respect to the stator, wherein the rotor has a turntable on which a disk-shaped information recording medium is mounted. An attached shaft, and a rotor yoke fixed to the other of the shafts and having a driving magnet, wherein the stator has a stator wiring board disposed between the turntable and the rotor yoke; A housing fixed to the stator wiring board and press-fitted with a bearing for rotatably holding the shaft; and a coil for rotating the rotor by magnetic interaction with the driving magnet when energized. The bearing supports the shaft with lubricating oil, and the lubricating oil of the bearing is provided between the turntable and the bearing. A lubricating oil leakage prevention member for preventing leakage to the turntable side is arranged, and a thrust bearing for preventing the turntable and the bearing from directly hitting is arranged between the turntable and the bearing. A motor characterized in that:

According to the first aspect, the rotor has a shaft, a turntable, and a rotor yoke. The turntable is coiled around one of the shafts, and mounts a disc-shaped information recording medium. The rotor yoke is coiled around the other end of the shaft and has a driving magnet. The stator has a stator wiring board, a housing and a coil. The stator wiring board is located between the turntable and the rotor yoke. The housing is fixed to the stator wiring board, and a bearing for rotatably holding the shaft is press-fitted in the housing. When the coil is energized, the rotor rotates by a magnetic interaction with a driving magnet. The bearing supports the shaft using lubricating oil. The lubricating oil leakage preventing member is disposed between the turntable and the bearing, and prevents the lubricating oil of the bearing from leaking to the turntable. As a result, the lubricating oil of the bearing can be prevented from leaking by the lubricating oil leakage preventing member when the bearing rotatably holds the shaft using the lubricating oil instead of using the ball bearing. There is no danger that oil leaks to the turntable side and stains the turntable or the disc-shaped information recording medium. The thrust bearing is arranged between the turntable and the bearing, and prevents the turntable and the bearing from directly hitting each other. As a result, even if the turntable is made of a material softer than the bearing, such as brass or plastic, the thrust bearing prevents the turntable from directly hitting the bearing, so that the turntable is worn. There is no. When the motor is mounted on the chassis side with respect to the stator wiring board, the distance between the stator wiring board and the turntable can be made smaller than before, since the stator wiring board is disposed between the turntable and the rotor yoke. It is possible to improve the reading of information on the optical disk and the like by reducing the influence of surface runout.

According to a second aspect of the present invention, in the motor according to the first aspect, the bearing is a sintered oil-impregnated bearing.

According to a third aspect of the present invention, in the motor according to the first aspect, the bearing is a fluid bearing.

According to a fourth aspect of the present invention, in the motor according to the first aspect, the lubricating oil leakage preventing member and the thrust bearing are integrally mounted on the turntable. According to the fourth aspect, the lubricating oil leakage prevention member and the thrust bearing are integrally attached to the turntable, so that the lubricating oil leakage prevention member and the thrust bearing can be attached to the turntable in advance, and the assemblability is improved. Can be improved.

According to a fifth aspect of the present invention, in the motor according to the fourth aspect, the lubricating oil leakage preventing member and the thrust bearing are located in the housing. Claim 5
Since the lubricating oil leakage preventing member is disposed in the housing, the lubricating oil of the bearing can be returned into the housing by the lubricating oil leakage preventing member, and the lubricating oil does not leak out of the housing.

According to a sixth aspect of the present invention, there is provided an optical disk apparatus having a motor having a stator and a rotor rotating with respect to the stator, wherein the rotor has a turntable on which a disk-shaped information recording medium is mounted. A rotor yoke fixed to the other of the shafts and having a driving magnet, wherein the stator includes a stator wiring board disposed between the turntable and the rotor yoke; A housing fixed to a plate and press-fitted with a bearing that rotatably holds the shaft, and a coil that rotates the rotor by magnetic interaction with the driving magnet when energized, The bearing supports the shaft using lubricating oil, and between the turntable and the bearing, the bearing of the bearing is provided. A lubricating oil leakage prevention member for preventing lubricating oil from leaking to the turntable side is arranged, and a thrust bearing for preventing the turntable and the bearing from directly hitting is arranged between the turntable and the bearing. An optical disk device having a motor characterized in that:

According to the present invention, the rotor has a shaft, a turntable and a rotor yoke. The turntable is press-fitted to one of the shafts, and mounts a disc-shaped information recording medium. The rotor yoke is coiled around the other end of the shaft and has a driving magnet. The stator has a stator wiring board, a housing and a coil. The stator wiring board is located between the turntable and the rotor yoke. The housing is fixed to the stator wiring board, and a bearing for rotatably holding the shaft is press-fitted in the housing. When the coil is energized, the rotor rotates by a magnetic interaction with a driving magnet. The bearing supports the shaft using lubricating oil. The lubricating oil leakage preventing member is disposed between the turntable and the bearing, and prevents the lubricating oil of the bearing from leaking to the turntable. As a result, the lubricating oil of the bearing can be prevented from leaking by the lubricating oil leakage preventing member when the bearing rotatably holds the shaft using the lubricating oil instead of using the ball bearing. There is no danger that oil leaks to the turntable side and stains the turntable or the disc-shaped information recording medium. The thrust bearing is arranged between the turntable and the bearing, and prevents the turntable and the bearing from directly hitting each other. As a result, even if the turntable is made of a material softer than the bearing, for example, brass or plastic, the thrust bearing prevents the turntable from directly hitting the bearing, so that the turntable is worn. There is no. When the motor is mounted on the chassis side with respect to the stator wiring board, the distance between the stator wiring board and the turntable can be made smaller than before because the stator wiring board is disposed between the turntable and the rotor yoke, and the It is possible to improve the reading of information on the optical disk and the like by reducing the influence of surface runout.

According to a seventh aspect of the present invention, in the optical disk device having the motor according to the sixth aspect, the bearing is a sintered oil-impregnated bearing.

According to an eighth aspect of the present invention, in the optical disk device having the motor according to the sixth aspect, the bearing is a fluid bearing.

According to a ninth aspect of the present invention, in the optical disk apparatus having the motor according to the sixth aspect, the lubricating oil leakage preventing member and the thrust bearing are integrally mounted on the turntable. According to the ninth aspect, the lubricating oil leakage preventing member and the thrust bearing are integrally attached to the turntable, so that the lubricating oil leakage preventing member and the thrust bearing can be attached to the turntable in advance. Can be improved.

According to a tenth aspect of the present invention, in the optical disk device having the motor according to the ninth aspect, the lubricating oil leakage preventing member and the thrust bearing are located in the housing. According to the tenth aspect, since the lubricating oil leakage preventing member is disposed in the housing, the lubricating oil of the bearing can be returned into the housing by the lubricating oil leakage preventing member, and the lubricating oil can leak out of the housing. Absent.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows a preferred embodiment of a motor and an optical disk apparatus having the motor according to the present invention. The optical disk device 1 having a motor includes a motor 10, an optical pickup 12, and a mechanical unit 14 called a mechanical deck or the like. The motor 10 has a rotor 20 and a stator 22. Turntable 24
Is designed to detachably hold a disc-shaped information recording medium, for example, an optical disc D using a clamper 26.

The optical disk D is, for example, DVD (digital versatile disk), CD (compact disk), C
Examples include a D-ROM (read only memory using a compact disk) and an MD (mini disk, magneto-optical disk). The optical pickup 12 is for reproduction having a function of optically reading information recorded on the optical disk D by irradiating the light 28 and receiving the return light. The optical pickup 12 may be used for both recording and reproduction, which has a function of not only reading information on the optical disc D but also writing information on the optical disc D.

The mechanism section 14 shown in FIG. 1 houses the rotor 20 of the motor 10, other mechanical parts (not shown), a board, and the like. When the optical disc D is mounted on the turntable 24, the magnet 26A of the clamper 26 and the chuck yoke 24A of the turntable 24 are magnetically attracted.
The optical disc D can be detachably fixed to the turntable 24. The motor 10 is different from the conventional motor as shown in FIG.
However, it has a structure in which the stator wiring board 32 is disposed between the turntable 24 and the rotor yoke 30 on the opposite side away from the turntable 24. The stator wiring board 32 is fixed to a mounting plate 34 of the mechanism section 14.

FIG. 2 is a sectional view showing the structure of the motor 10 of FIG. 1 in more detail. FIG. 3 is an enlarged view showing the right half structure of the motor 10 of FIG. 2 as a representative. 2 and 3, the rotor 20 of the motor 10 has a turntable 24, a shaft 40, a rotor yoke 30, and a driving magnet 42 schematically. The turntable 24 for chucking is made of metal, for example, brass,
It is made of plastic, for example, polycarbonate, polyetherimide. The turntable 24
The shaft 40 is fixed to one end 40A of the shaft 40 by press fitting. A chuck yoke 24A for chucking is accommodated in the recess of the turntable 24, and the yoke 24A is fixed to the end 40A by press-fitting. A friction sheet 46 is mounted on the turntable 24. The friction sheet 46 is for preventing the optical disc D on the turntable from slipping due to rotation by friction. On the lower surface of the turntable 24, a projection 48 is formed around the axis 40. The rotor yoke 30 is made of, for example, iron to form a magnetic circuit, and has a substantially U-shaped cross section. A driving magnet 4 is provided inside the rotor yoke 30.
2 is fixed by bonding or the like.

Next, the stator 22 of the motor 10 shown in FIGS. 2 and 3 will be described. The stator 22 generally includes a stator wiring board 32, a housing 50, an iron core winding assembly 52, an oil guard 54, and the like. The stator wiring board 32 is, as shown in FIG.
4 is fixed. The stator wiring board 32 fixes the flat cable 56 with a reinforcing tape 58.
On the lower surface side of the stator wiring board 32, a Hall element 60 is mounted. The magnet 42 is formed by magnetizing the S pole and the N pole in a multi-polar manner in the rotation direction.
By detecting the north pole and the south pole of the magnet 42, the number of rotations and the rotation angle of the rotor 20 can be magnetically detected.

The housing 50 is a substantially cylindrical member, and an intermediate portion of the housing 50 is fixed to the stator wiring board 32 by a caulking portion 70. Inside the housing 50, a metal bearing 72 and a thrust bearing 74
And an oil guard 76. Housing 5
An oil guard 54 is fixed to the lower part of the cylinder 0 by, for example, press fitting or bonding. The housing 50 is made of, for example, brass. The oil guard 54 and the oil guard 76 are made of, for example, stainless steel (SU
S), made of polyacetal (POM).

The inside of the housing 50 has a small diameter portion 80 and a large diameter portion 82. A metal bearing 72 is arranged between the small diameter portion 80 and the outer peripheral surface of the shaft 40. The metal bearing 72 is, for example, a sintered oil-impregnated bearing. This sintered oil-impregnated bearing is, for example, a sintered metal having many minute porous parts (nests), and the porous parts are impregnated with lubricating oil. As the sintered oil-impregnated bearing, for example, an alloy made of copper, iron, tin, or the like can be used as the sintered metal. The sintered oil-impregnated bearing positively supplies a lubricating oil to the shaft 40, and a mechanical oil or the like can be used as the lubricating oil.

The metal bearing 72 is a substantially cylindrical bearing. However, a space is formed between the inner peripheral surface of the large diameter portion 82 of the housing 50 and the outer peripheral surface of the metal bearing 72. The lower oil guard 54 is a member for preventing the lubricating oil generated from the metal bearing 72 from leaking to the inner surface side of the rotor yoke 30. Projection 4 of turntable 24
A thrust receiver 74 and an oil guard 76 are arranged between the upper end 8 and the metal bearing 72. The oil guard 76 corresponds to a lubricating oil leakage prevention member for preventing the lubricating oil of the metal bearing 72 from rising toward the turntable 24 and leaking when the rotor 20 rotates.

The oil guard 76 has an oil return portion 76A having an L-shaped cross section as shown in FIG. The oil guard 76 is fixed to the projection 48 by, for example, press fitting, bonding, or a combination thereof. Therefore, the thrust bearing 7
The oil guard 4 and the oil guard 76 rotate about the shaft 40 integrally with the turntable 24. The thrust bearing 74 is provided between the upper end of the metal bearing 72 and the turntable 2.
4 is a member for preventing the projection 48 from directly hitting. The thrust bearing 74 is pressed into the shaft 40 and fixed.

The iron core winding assembly 52 of FIG. 2 is fixed to the lower portion of the housing 50 by bonding or press fitting or a combination thereof. Iron core winding assembly 52
Has an iron core 52A and a coil 52B. Coil 5
2B, the rotor 20 continuously rotates with respect to the stator 22 due to the interaction between the magnetic field generated by the coil and the magnetic field generated by the magnet 42 when a current is applied to the 2B from the outside via the stator wiring board 32 in a predetermined energizing pattern. I do.

The distance H1 shown in FIG.
The distance H1 is a distance from the mounting surface of the mounting plate 34 of the mechanism section 14 to the mounting surface of the turntable 24. The accuracy of the distance H1 needs to be within a movable range in which the objective lens of the optical pickup 12 can move, and dimensional accuracy is required. The distance H2 from the top surface of the turntable 24 to the mounting surface of the turntable 24 requires dimensional accuracy in order to prevent the clamping force of the clamper 26 of the optical disc D from fluctuating. In order to satisfy such a requirement, unlike the related art, the rotor yoke 30 of the rotor 20 is located at a position opposite to the position of the turntable 24 with the stator wiring board 32 interposed therebetween. It is configured to be as small as possible. Thus, by reducing the distance H1 and increasing the dimensional accuracy of the distance H1, the dimensional accuracy does not affect the movable range in which the objective lens of the optical pickup can move. Therefore, the objective lens follows the surface shake of the optical disk, and can correctly read information on the optical disk.

The thrust bearing 74 in FIG. 2 is made of, for example, the same sintered body as the material of the metal bearing 72, and its thickness accuracy and surface roughness are improved by sizing (dimensional processing). The lower surface of the thrust bearing 74 is used as a reference plane P as shown in FIG. Glued.

The oil guard 76 has a function of preventing the lubricating oil of the housing 50 from scattering to the turntable 24 due to centrifugal force when the turntable 24 rotates, and preventing the lubricating oil from leaking. The iron core winding assembly 52 is fixed to the housing 50 into which the metal bearing 72 is press-fitted by bonding or press-fitting, and then the oil guard 54 is press-fitted to the lower end of the housing 50 and fixed.

A hall element 60 and a flat cable 56 are fixed to the stator wiring board 32 shown in FIG. 2 by soldering. A reinforcing tape 58 is attached to the stator wiring board 32 to reinforce the flat cable 56. Affixed between 56. After the shaft 40 integrated with the turntable 24 is inserted into the metal bearing 72 in the housing 50 of the stator 22, the rotor yoke 30 is pressed into the other end 40B of the shaft 40 and fixed. is there.

Next, the operation of the motor shown in FIGS. 1 to 3 will be briefly described. The coil 52B of the stator 22 is energized in a predetermined energizing pattern from an external control unit via the stator wiring board 32, so that the coil 52B generates a magnetic field, and the magnetic field of the coil 52B and the magnet 42 of the rotor 20 Interact with each other. As a result, the rotor 20 continuously rotates with respect to the stator 22 about the shaft 40, so that the optical disc D mounted on the turntable 24 continuously rotates. By the way, when the turntable 24 is rotating continuously, the lubricating oil of the metal bearing 72 tends to rise toward the turntable 24 due to centrifugal force. However, since the oil guard 76 is located in the housing 50, the rising lubricating oil can be returned to the metal bearing 72 side through the inside of the housing 50 by the oil guard 76.

Even if the turntable 24 is made of a soft material such as brass or plastic, since the turntable 24 and the thrust bearing 74 are integrated, the thrust bearing 74 is formed by the projection 48 of the turntable 24 and the metal bearing 72. Is prevented from hitting directly. For this reason, the projection 48 of the turntable 24 is
Can be prevented from being worn.

FIG. 4 shows another embodiment of the present invention, in which a part of the shaft 40 is omitted in order to show the groove 200 of the metal bearing 72. In the embodiment of FIG. 2, the metal bearing 72 uses a sintered oil-impregnated bearing, but in the example of FIG. 4, a hydrodynamic fluid bearing (corresponding to a fluid bearing).
Is adopted. This dynamic pressure fluid bearing has a groove 200 for generating dynamic pressure, for example, a herringbone type dynamic pressure generation, on its inner peripheral surface. Lubricating oil is also stored in the groove 200 for generating dynamic pressure. As described above, even if the lubricating oil is in the groove 200 for generating dynamic pressure, the phenomenon that the lubricating oil is scattered or leaks to the turntable 24 side because of the oil guard 76 is provided. Further, since the thrust bearing 74 is similarly disposed between the projection 48 of the turntable 24 and the metal bearing 72, the projection 48 of the turntable 24 is not worn by the metal bearing 72.

In the embodiment of the present invention, since the distance H1 between the mounting surface and the optical disk surface is reduced, it is possible to reduce the influence of surface runout when the optical disk is eccentric or the like, and the optical pickup can stably signal. Can read. Since the distance H1 between the mounting surface and the optical disk surface is small, the shaft 4
The influence of the tilt on the 0 vertical line is reduced, and the positioning accuracy between the optical disk center and the optical pickup is increased. Since the rotor yoke 30 is located at a position opposite to the turntable 24 with the stator wiring board 32 therebetween, the center of gravity is
2, the bearing life is extended. Since the sintered thrust bearing 74 can be sized, the thickness dimensional accuracy can be increased, the accuracy of the distance H2 from the top of the turntable to the turntable surface can be increased, and the clamping force of the optical disc does not vary. The surface roughness of the thrust bearing 74 is good, and the thrust bearing 74 can be impregnated with oil, so that the friction between the thrust bearing 74 and the metal bearing 72 is small, and the power consumption of the motor 10 can be reduced.
Since the thrust bearing 74 can be press-fitted into the shaft 40, the turntable 24 does not wear due to friction with the turntable 24 due to idling, and high reliability can be obtained even at high speed rotation.

The present invention is not limited to the above embodiment. The optical disk mounted on the turntable is not limited to the above-mentioned type of optical disk, but may be another type of disk or the like.

[0036]

As described above, according to the present invention,
Wear of the chucking part is reduced by reducing the distance between the reference surface for mounting the motor and the chucking surface of the optical disk while preventing leakage of lubricating oil from the bearing, and preventing direct contact between the turntable and the bearing. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a preferred embodiment of a motor and an optical disk device having the motor of the present invention.

FIG. 2 is a sectional view of the motor shown in FIG.

FIG. 3 is an enlarged sectional view showing a right half of the optical disk device of FIG. 2;

FIG. 4 is a cross-sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional optical disc device.

[Description of Signs] 1 ... Optical disk device having motor, 10 ... Motor, 20 ... Rotor, 22 ... Stator, 24 ...
..Turn table, 30 ... rotor yoke, 32
..Stator wiring board, 40 ... shaft, 42 ... magnet of rotor, 50 ... housing, 72 ... metal bearing (corresponding to bearing), 74 ... thrust bearing, 76 ... oil Guard (corresponding to lubricating oil leakage prevention member), D ... optical disk

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) G11B 19/20 G11B 19/20 DE H02K 5/10 H02K 5/10 Z 5/16 5/16 Z 7 / 08 7/08 A 7/14 7/14 C 21/22 21/22 M (72) Inventor Tatsuro Hayakawa 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Name of inventor Yuichi Nae 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo F-term in Sony Corporation (reference) 3J011 AA04 AA07 BA02 BA08 CA02 JA02 KA02 KA03 LA01 MA12 MA27 RA03 5D109 BA09 BA14 BA17 BA20 BA37 BB05 BB14 BB18 BB21 BB22 5H605 A03 BB05 BB19 CC01 CC02 CC03 CC04 CC05 CC10 DD09 EA06 EB02 EB06 EB13 EB26 EB28 EB31 GG04 5H607 BB17 DD03 DD09 DD14 FF12 GG01 GG02 GG09 GG10 GG12 GG28 JJ07 5H621 BB10 GA04 JK07 JK13 JK17

Claims (10)

[Claims] 1. A motor having a stator and a rotor that rotates with respect to the stator, wherein the rotor has a shaft on which a turntable on which a disc-shaped information recording medium is mounted is mounted, and the other of the shaft has A rotor yoke fixed and having a driving magnet, wherein the stator is arranged between the turntable and the rotor yoke, a stator wiring board, and fixed to the stator wiring board to rotate the shaft. A housing in which a bearing to be freely held is press-fitted; and a coil for rotating the rotor by magnetic interaction with the driving magnet when energized, the bearing comprising a lubricating oil for the shaft. The lubricating oil of the bearing leaks to the turntable side between the turntable and the bearing. A lubricating oil leakage prevention member is disposed between the turntable and the bearing, and a thrust bearing for preventing the turntable and the bearing from directly contacting each other is disposed between the turntable and the bearing. motor. 2. The motor according to claim 1, wherein the bearing is a sintered oil-impregnated bearing. 3. The motor according to claim 1, wherein the bearing is a fluid bearing. 4. The motor according to claim 1, wherein the lubricating oil leakage preventing member and the thrust bearing are integrally mounted on the turntable. 5. The lubricating oil leakage prevention member and the thrust bearing are located in the housing.
A motor according to claim 1. 6. An optical disk device comprising a motor having a stator and a rotor rotating with respect to the stator, wherein the rotor has a shaft on which a turntable for mounting a disk-shaped information recording medium is mounted, A rotor yoke fixed to the other shaft and having a driving magnet, wherein the stator is fixed to the stator wiring board and a stator wiring board disposed between the turntable and the rotor yoke; A housing in which a bearing for rotatably holding the shaft is press-fitted; and a coil for rotating the rotor by magnetic interaction with a magnet for driving when energized, wherein the bearing includes the shaft. Is supported using lubricating oil, and between the turntable and the bearing, the lubricating oil of the bearing is A lubricating oil leakage prevention member for preventing leakage to the turntable side is arranged, and a thrust bearing for preventing the turntable and the bearing from directly hitting is arranged between the turntable and the bearing. An optical disc device having a motor characterized by the above-mentioned. 7. The optical disk device having a motor according to claim 6, wherein the bearing is a sintered oil-impregnated bearing. 8. The optical disk device having a motor according to claim 6, wherein the bearing is a fluid bearing. 9. The optical disk device having a motor according to claim 6, wherein the lubricating oil leakage prevention member and the thrust bearing are integrally attached to the turntable. 10. The optical disk device having the motor according to claim 9, wherein the lubricating oil leakage preventing member and the thrust bearing are located in the housing.