JPH08171790A - Spindle motor cleaning device - Google Patents

Abstract

PURPOSE: To clean a turntable and a magnet clutch of a spindle motor by providing a thin sheet like vicoelastic member on a surface abutting on the table. CONSTITUTION: When a cleaning disk 1 is loaded, the disk 1 and a chucking hub 7 are moved downward, and a permanent magnet 7a attracts the attraction hub 5 of the spindle motor 3, and the disk 1 is positioned at its center of the rotation, and is held and fixed between the turntable 3a and the chucking hub 7. In such a state, the viscoelastic member 2 of the disk 1 is pressed to the table 3a by the attracting force of the magnet 7a of the hub 7. Thus, the member 2 attracts dust on the table 3a. When the disk 1 is ejected to the outside of the device in this state, the disk is released from the table 3a, and is taken out from an optical disk device while being attracted by the member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor cleaning device for cleaning a turntable and a chucking magnet supporting an optical disc when the optical disc is loaded and driven by a spindle motor in an optical disc device. is there.

[0002]

2. Description of the Related Art In recent years, as the capacity of information recording media has increased,
An optical disk memory is drawing attention as a high-density recording medium. Recording / reproducing / erasing of information on this optical disk is realized as follows. That is, generally, the center of the optical disc is positioned with respect to the rotation center of the spindle motor, the optical disc is loaded into the optical disc device, and the optical head is seek-moved in the radial direction with respect to the optical disc to move a predetermined track of the optical disc. The objective lens of the optical head is focused on, the objective lens is made to follow the rotation of the optical disc, and the spot of the semiconductor laser formed on the track is used to write or erase information thermally or magneto-optically. Moreover, information is read by reflected light.

In particular, an optical disk device used for recording data on a computer is a compact disk (hereinafter referred to as a CD) in order to speed up the transfer rate or lengthen the recording pits for stable recording and reproduction. Much faster than the speed of mini discs (MD) 3
Generally, the optical disk is rotated at a rotation speed of around 600 rpm.

In this case, the surface wobbling acceleration or the track wobbling acceleration of the optical disk is proportional to the square of the number of rotations. Therefore, when the optical disk is rotated at such a high number of rotations, the focus servo for focusing the objective lens on the disk is achieved. The tracking servo that follows the track groove of the disk is a heavy burden. Therefore, CD, M
Compared with the spindle motor of D, the processing for reducing the surface runout of the turntable, the assembling accuracy, the accuracy for reducing the axial runout of the rotary shaft are improved, and the surface runout acceleration or the track runout acceleration of the optical disk increases. Is suppressed.

[0005]

However, since an optical disk is generally a portable medium, and even when it is stored in a cartridge, there are many occasions when it comes into contact with dust, and therefore, from the loading port of the optical disk device. It is extremely difficult to prevent dust from getting into the periphery of the spindle motor from the inside of the cartridge when it is loaded or loaded.

Needless to say, when these dusts are placed on the turntable, the same results as when the surface deflection of the optical disk is increased. The effect depends on the size of dust, but if it is 10 μm or more,
With the chucking fixed to the turntable, the increase in the surface wobbling acceleration of the optical disk becomes a value that cannot be ignored by the focus servo, and in some cases, the focus servo may not be applied.

[0007] However, dust of about 10 μm exists in our living space, so it cannot be ignored. In particular, the dust on the turntable is pressed by the optical disc during chucking, so it has a strong adhesive force and is difficult to remove with an air blower.
Further, since the spindle motor itself is located at the center of the optical disk device, cleaning from the outside is structurally difficult.

FIG. 15 is a schematic view showing an example of the arrangement of a spindle motor and an optical disk of a general optical disk device. Here, a spindle motor 102 is arranged inside the optical disk device 101, and a turntable 102 is provided.
The optical disk 103 is placed on a. The spindle motor 102 is arranged inside the optical disc device 101 by at least the radius of the optical disc, and is separated from the insertion opening 101a of the optical disc 103. Therefore, cleaning the turntable 102a from the insertion opening 101a is a task that requires a considerable amount of skill.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. When the chucking operation of an optical disc, the dust on the turntable is adsorbed and held, and when the optical disc is ejected, the dust is removed to the outside. An object of the present invention is to provide a spindle motor cleaning device for cleaning a turntable of a spindle motor and a magnetic clutch that hold an optical disk in contact therewith.

[0010]

Therefore, in the present invention,
In an optical disk device in which an optical disk is chucked by a spindle motor and rotationally driven, the turntable is cleaned by using a cleaning optical disk provided with a thin sheet-shaped viscoelastic member on the surface of the spindle motor that contacts the turntable. It is characterized by that.

Further, according to the present invention, in an optical disk device in which an optical disk having a hub made of a magnetic material is magnetically chucked by a permanent magnet fixed to a spindle motor and is rotationally driven, a surface contacting a turntable of the spindle motor. And a cleaning optical disk provided with a thin sheet-shaped viscoelastic member on the hub surface facing the permanent magnet, and the viscoelastic member is brought into contact with the turntable and the permanent magnet at the same time during chucking. It is characterized by that.

In this case, the cleaning optical disk is housed in a cartridge loaded in the optical disk device, and the cleaning optical disk is installed from outside the optical disk device so that the viscoelastic member of the cleaning optical disk comes into contact with and separates from the turntable. It is preferable to include a mechanism for selectively moving the optical disk for use between the chucking position and the separated position from the spindle motor.

[0013]

【Example】

(First Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1, 2 and 3 show an embodiment of a cleaning optical disc according to the first aspect of the present invention,
1 is a perspective view from below, FIG. 2 is a cross-sectional view showing a configuration of a typical spindle motor in which the cleaning optical disc in the first invention is used, and FIG. 3 is a state in which the cleaning optical disc is chucked by the spindle motor. FIG.

In FIG. 1, reference numeral 1 is an optical disc for cleaning, and it may have a shape equivalent to the optical disc or a shape that does not hinder loading into the optical disc device, and recording / reproducing is not necessarily required. Of course, a recordable / playable disc will do. Reference numeral 1a is a chucking center hole provided on the cleaning optical disk, and has a size in conformity with various disk standards. Reference numeral 2 denotes a thin sheet-shaped viscoelastic member fixed to the cleaning optical disc 1, which is arranged on the surface of the optical disc that comes into contact with the turntable of the spindle motor.

In FIG. 2, reference numeral 3 is a spindle motor for rotationally driving the optical disk, a turntable 3a for supporting the cleaning optical disk 1 is formed, and a rotary shaft 3b is provided with a positioning hole 3c for positioning a chucking hub described later. Are formed. Reference numeral 4 denotes a taper cone, which is movable in the rotation axis direction of the spindle motor 3 and has an inclined portion 4a for positioning the center hole 1a of the cleaning optical disc 1. Further, reference numeral 5 is a suction yoke, which is made of a magnetic material, magnetically attracts a chucking hub described later, and also serves to prevent the taper cone 4 from coming off.

Reference numeral 6 is a spring for urging the taper cone 4 in the direction of separating the cleaning optical disk 1, and reference numeral 7 is a spindle motor 3 by a mechanism (not shown).
Is a chucking hub that is supported above, and has a permanent magnet 7a that magnetically attracts the attraction yoke 5 of the spindle motor 3 and a pin 7b that fits into the positioning hole 3c of the rotary shaft 3b.

Next, the operation of the first embodiment will be described with reference to FIGS. In FIG. 2, when the cleaning optical disc 1 is loaded, the cleaning optical disc 1 and the chucking hub 7 are moved downward by a mechanism (not shown), and the permanent magnet 7a attracts the attraction hub 5 of the spindle motor 3, The cleaning optical disk 1 is positioned at the center of rotation by the taper cone 4, and is sandwiched and fixed by the turntable 3a of the spindle motor 3 and the chucking hub 7. At this time, the center of the chucking hub 7 is also positioned by fitting the pin 7b into the positioning hole 3c formed in the rotary shaft 3b of the spindle motor 3. This state is shown in FIG.

In this state, the thin sheet-shaped viscoelastic member 2 of the cleaning optical disk 1 is pressed against the turntable 3a of the spindle motor 3 by the attraction force of the permanent magnet 7a of the chucking hub 7. Therefore, the thin sheet-shaped viscoelastic member 2 adsorbs dust on the turntable 3a. From this state, if the cleaning optical disc 1 is ejected to the outside of the device, the dust is released from the turntable 3a,
The thin sheet-shaped viscoelastic member 2 can be taken out to the outside of the optical disk device while being adsorbed. The turntable 3a is cleaned as described above.

In the above-described embodiment, a thin sheet-shaped viscoelastic member may be fixed to an ordinary optical disk without preparing a special cleaning optical disk for cleaning use. If the thin sheet-shaped viscoelastic member can be replaced by the user, only the thin sheet-shaped viscoelastic member can be prepared and used by pasting it on the optical disc as needed. Further, in the case of an optical disk using a cartridge, the cleaning optical disk 1 can be used similarly by putting it in the cartridge. (Second Embodiment) FIGS. 4, 5 and 6 are views showing a second embodiment of the cleaning optical disk according to the present invention. FIG. 4 is a perspective view from below and FIG. FIG. 6 is a sectional view showing a configuration of a typical spindle motor in which a cleaning optical disk is used, and FIG. 6 is a sectional view showing a state in which the cleaning optical disk is chucked by the spindle motor.

In FIG. 4, reference numeral 11 is an optical disc for cleaning, and it may have a shape similar to that of the optical disc or a shape that does not hinder loading into the apparatus, and recording / reproduction is not necessary, but recording / reproduction is possible. Of course, you can use any disc. Further, reference numeral 11a is a center hole for chucking provided in the cleaning optical disc, and has a size in conformity with the standard. Reference numeral 11 is a hub made of a magnetic material for magnetic chucking by a permanent magnet of a spindle motor, and has a convex shape. Further, reference numerals 12 and 13 are cleaning optical discs 1.
1 is a thin sheet-shaped viscoelastic member, the viscoelastic member 12 is disposed on the surface of the optical disc that abuts the turntable of the spindle motor, and the viscoelastic member 13 is also a permanent magnet for chucking the spindle motor. Is located on the hub surface that abuts against.

In FIG. 5, reference numeral 14 is a spindle motor for rotationally driving the optical disk, on which a turntable 14a for supporting the cleaning optical disk 11 is formed.
The tip of the rotating shaft 14b engages with the chucking center hole 11a of the cleaning optical disk 11 to position the center. Reference numeral 15 is a permanent magnet fixed to the spindle motor 14, and the cleaning optical disc 1 is attracted by the permanent magnet.
The first hub 11b is attracted and magnet chucking is performed.

Next, the operation of the second embodiment will be described with reference to FIGS. In FIG. 5, when the cleaning optical disk 11 is loaded, the cleaning optical disk 11 is moved downward by a mechanism (not shown), and the hub 11b is attracted and rotated by the attraction force of the permanent magnet 15 of the spindle motor 14. By engaging the tip of the shaft 14b with the center hole 11a for chucking,
The center is positioned and fixed to the turntable 14a of the spindle motor 14.

FIG. 6 shows this state. In this state, one thin sheet-shaped viscoelastic member 12 of the cleaning optical disk 11 is pressed against the turntable 14a, and the other thin sheet-shaped viscoelastic member 13 is pressed against the permanent magnet 15 by its attractive force. . Therefore, the thin sheet-shaped viscoelastic members 12 and 13 adsorb dust on the adsorption surfaces of the turntable 14 a and the permanent magnet 15. When the cleaning optical disk 11 is ejected from this state, dust is released from the attracting surfaces of the turntable 14a and the permanent magnet 15 and is attracted to the thin sheet-like viscoelastic members 12 and 13 while remaining outside the optical disk device. Can be taken out. As described above, the attracting surfaces of the turntable 14a and the permanent magnet 15 are cleaned.

In the second embodiment, a thin sheet-shaped viscoelastic member may be fixed to an ordinary optical disk without preparing a special optical disk for cleaning used therein. The thin sheet viscoelastic member can also be used by the user reattaching it. In this case, only the thin sheet viscoelastic member needs to be prepared in advance. Further, in the case of an optical disk using a cartridge, the cleaning optical disk 11 can be used similarly by putting it in the cartridge. (Third Embodiment) FIGS. 7, 8, 9, and 10 are views showing a cleaning cartridge according to a third embodiment of the present invention. FIG. 7 is a perspective view from above, and FIG. 8 is a top view. FIG. 9 is a cross-sectional view showing the cleaning optical disk in the cleaning cartridge before being chucked by the spindle motor, and FIG. 10 is a sectional view showing the cleaning optical disk in the cleaning cartridge being chucked by the spindle motor. It is sectional drawing shown.

In FIGS. 7 and 8, reference numeral 21 is a cleaning optical disk, which has the same structure as the cleaning optical disk of the first invention of the present invention, but cannot be recorded / reproduced, so the outer diameter of the disk is , Smaller than the original optical disc. 22 is a cartridge in which the cleaning optical disk 21 is housed, 23 is a leaf spring that biases the cleaning optical disk 21 in a direction away from the chucking position, and the leaf spring 23 is provided between the cleaning optical disk 21 and the cartridge 22. It is arranged.

Reference numeral 24 is a lever for pressing the cleaning optical disk 21 against the urging force of the leaf spring 23 in the chucking direction, and by rotating the knob 24a thereof,
The cam portion 24b presses the back surface of the cleaning optical disk 21 to move the cleaning optical disk 21 downward in the chucking direction.
To move.

Next, the operation of the third embodiment will be described with reference to FIGS. 9 and 10. Since the function of the cleaning optical disk 21 and the structure of the spindle motor are the same as those of the first embodiment, the same reference numerals are given and the description thereof will be omitted. FIG. 9 is a cross-sectional view showing a state in which the cartridge 22 is not in the cleaning state, and the cleaning optical disk 21 is in a substantially neutral position by the leaf spring 23. Cartridge 22
When the knob 24a of the cartridge 22 is rotated in a state where the cartridge is loaded in the optical disc device and is in the chucking position of the spindle motor 3, the cam portion 24b resists the urging force of the leaf spring 23 against the back surface of the cleaning optical disc 21. Then, the cleaning optical disk 21 is moved downward in the chucking direction. This state is shown in FIG.
By this operation, the thin sheet-shaped viscoelastic member 2 of the cleaning optical disk 21 is pressed against the turntable 3a of the spindle motor 3. Therefore, the viscoelastic member 2 is
Adsorb dust on the turntable 3a. If the knob 24a is returned to the original position from this state, the cleaning optical disk 21
Is returned to a substantially neutral position by the biasing force of the leaf spring 23, and the dust is released from the turntable 3a. like this,
When the cartridge 22 is ejected, dust can be taken out of the optical disk device while being adsorbed by the thin sheet-shaped viscoelastic member 2. The turntable 3a is cleaned as described above.

In the third embodiment, since the cleaning optical disc 21 is separated from the turntable 3a by the biasing force of the leaf spring 23, the viscoelastic member 2 is attached to the eject mechanism of the optical disc device. It can be used even when there is not enough driving force to overcome the force. (Fourth Embodiment) FIG. 11, FIG. 12, FIG. 13 and FIG.
FIG. 11 is a drawing showing a cleaning cartridge of a fourth embodiment of the present invention, FIG. 11 is a perspective view from above, FIG. 12 is a top view, and FIG.
3 is a sectional view showing a state before the cleaning optical disk in the cleaning cartridge is chucked by the spindle motor, and FIG. 14 is a sectional view showing a state where the cleaning optical disk in the cleaning cartridge is chucked by the spindle motor. Is.

In FIGS. 11 and 12, reference numeral 31 is a cleaning optical disc, which has the same structure as the cleaning optical disc of the second embodiment, but cannot record / reproduce, so the outer diameter of the disc is It is formed smaller than the original optical disc. 32 is a cartridge in which the cleaning optical disc 31 is housed, 33 is a leaf spring that biases the cleaning optical disc 31 in a direction away from the chucking position, and the leaf spring 33 is provided between the cleaning optical disc 31 and the cartridge 32. It is located in.

Reference numeral 34 indicates a cam portion 3 by rotating the knob 34a with a lever for pressing the cleaning optical disk 31 against the biasing force of the leaf spring 33 in the chucking direction.
4b presses the back surface of the cleaning optical disc 31, and moves the cleaning optical disc 31 in the downward chucking direction.

Next, the operation of the fourth embodiment will be described with reference to FIG.
3 and FIG. 14 will be described. Since the function of the cleaning optical disk 31 and the structure of the spindle motor are the same as those of the second embodiment, the same reference numerals are given and the description thereof will be omitted. FIG. 13 is a cross-sectional view showing a state where the cartridge 32 is not in the cleaning state, and the cleaning optical disc 31 is in a substantially neutral position by the leaf spring 33. With the cartridge 32 loaded in the optical disk device and in the chucking position of the spindle motor 14, the cartridge 3
When the second knob 34a is rotated, the cam portion 34b presses the back surface of the cleaning optical disk 31 against the biasing force of the leaf spring 33, and moves the cleaning optical disk 31 in the downward chucking direction. This state is shown in FIG. 14, and this operation causes the thin sheet-shaped viscoelastic member 12 of the cleaning optical disk 31 to move to the turntable 1 of the spindle motor 14.
4a, the other thin sheet-shaped viscoelastic member 13 is pressed by the permanent magnet 15 of the spindle motor 14. Therefore, the thin sheet-shaped viscoelastic members 12 and 13 adsorb dust on the adsorption surfaces of the turntable 14 a and the permanent magnet 15. When the knob 24a is returned to the original position from this state, the cleaning optical disc 31 is returned to the substantially neutral position by the urging force of the plate spring 33, and the dust is separated from the turntable 14a. If the cartridge 32 is ejected as it is,
The dust can be taken out of the optical disk device while being adsorbed by the sheet-shaped viscoelastic members 12 and 13. As described above, the attracting surfaces of the turntable 14a and the permanent magnet 15 are cleaned.

In the fourth embodiment, the turntable 14a and the permanent magnet 15 of the cleaning optical disk 31 are used.
Since the separation of the viscoelastic member 1 is performed by the urging force of the leaf spring 33, the viscoelastic member 1
It can be used even when there is not enough driving force to overcome the adhesive forces of 2 and 13.

FIG. 15 is a perspective view showing a state in which the cartridges 22 and 32 of the third and fourth embodiments are loaded in the optical disc device 101.
Since the reference numerals 2 and 32 are longer than the normal cartridges, some of them and the knobs 24a and 34a are exposed to the outside of the optical disk device. In addition, this cartridge 2
Reference numerals 2 and 32 are also configured not to operate the chucking device of the optical disc device 101.

[0034]

As described above in detail, the present invention is an optical disk device in which an optical disk is chucked by a spindle motor and is rotationally driven. Since the turntable is cleaned using the cleaning optical disk provided with a member, the cleaning optical disk is loaded into the optical disk device, and the chucking operation of the optical disk causes the sheet-shaped viscoelastic member to turn the optical disk. Since the dust on the table is suction-held and removed by ejecting the disk, cleaning of the turntable of the spindle motor can be easily realized.

Similarly, according to the present invention, an optical disk having a hub made of a magnetic material is magnetically chucked by a permanent magnet fixed to the spindle motor, and the disk is brought into contact with the turntable of the spindle motor in an optical disk drive. Using a cleaning optical disc having a thin sheet-shaped viscoelastic member provided on the surface and the hub surface facing the permanent magnet, the viscoelastic member is used for chucking.
At the same time, the turntable and the permanent magnet are brought into contact with each other. Therefore, the cleaning optical disk is loaded into the optical disk device, and the chucking operation of the optical disk causes the sheet-shaped viscoelastic member to move the magnetic disk onto the turntable. Since dust on the permanent magnet is adsorbed and held at the same time and removed by ejecting the disk, cleaning of the turntable of the spindle motor and the permanent magnet for chucking can be easily realized.

The present invention is also applicable to the case where the optical disk is stored in the cartridge. In this case, a mechanism capable of moving the cleaning optical disc from the outside of the optical disc device to the chucking position and the separated position of the spindle motor may be provided.

[Brief description of drawings]

FIG. 1 is a perspective view from below showing a first embodiment of a cleaning optical disc according to the present invention.

FIG. 2 is a sectional view showing a configuration of a typical spindle motor in which the cleaning optical disc is used.

FIG. 3 is a cross-sectional view showing a state where the cleaning optical disk is chucked by a spindle motor.

FIG. 4 is a bottom perspective view showing a cleaning optical disc according to a second embodiment.

FIG. 5 is a sectional view showing a configuration of a typical spindle motor in which the cleaning optical disc is used.

FIG. 6 is a cross-sectional view showing a state where the cleaning optical disk is chucked by a spindle motor.

FIG. 7 is a perspective view from above showing a cleaning cartridge according to a third embodiment of the present invention.

FIG. 8 is a top view of the cleaning cartridge.

FIG. 9 is a cross-sectional view showing a state before the cleaning optical disk in the cleaning cartridge is chucked by the spindle motor.

FIG. 10 is a cross-sectional view showing a state in which a cleaning optical disk in the cleaning cartridge is chucked by a spindle motor.

FIG. 11 is a perspective view from above showing a cleaning cartridge according to a fourth embodiment of the present invention.

FIG. 12 is a top view of the cleaning cartridge.

FIG. 13 is a cross-sectional view showing a state before the cleaning optical disk in the cleaning cartridge is chucked by the spindle motor.

FIG. 14 is a cross-sectional view showing a state in which a cleaning optical disk in the cleaning cartridge is chucked by a spindle motor.

FIG. 15 is a perspective view showing a state in which the cartridges according to the third and fourth embodiments are loaded in the optical disc device.

FIG. 16 is a schematic diagram showing an example of the arrangement of a spindle motor and an optical disc of a normal optical disc device.

[Explanation of symbols]

 1 Cleaning Optical Disk 2 Thin Sheet-Shaped Viscoelastic Member 3 Spindle Motor 3a Turntable 4 Tapered Cone 5 Adsorption Yoke 6 Spring 7 Chucking Hub 8a Permanent Magnet 11 Cleaning Optical Disk 11b Hub 12 Thin Sheet Viscoelastic Member 13 Thin Sheet Viscoelastic member 14 spindle motor 14a turntable 15 permanent magnet 21 cleaning optical disc 22 cartridge 23 leaf spring 24 lever 24a knob 24b cam portion 31 cleaning optical disc 32 cartridge 33 leaf spring 34 lever 34a knob 34b cam portion 101 optical disc device

Claims (3)

[Claims] 1. An optical disk device in which an optical disk is chucked by a spindle motor and is driven to rotate, using a cleaning optical disk provided with a thin sheet-shaped viscoelastic member on a surface of the spindle motor that abuts a turntable. A spindle motor cleaning device for cleaning a table. 2. In an optical disk device in which an optical disk having a hub made of a magnetic material is magnetically chucked by a permanent magnet fixed to a spindle motor and is rotationally driven, a surface abutting on a turntable of the spindle motor and the permanent magnet. A cleaning optical disk provided with a thin sheet-shaped viscoelastic member on a hub surface facing to each other is used, and the viscoelastic member is brought into contact with the turntable and the permanent magnet at the same time when chucking. Spindle motor cleaning device. 3. The cleaning optical disk is housed in a cartridge that is loaded into the optical disk device, and the cleaning optical disk is installed from the outside of the optical disk device so that its viscoelastic member comes into contact with and separates from a turntable. 3. The spindle motor cleaning device according to claim 1, further comprising a mechanism for selectively moving the optical disc between a chucking position and a separating position with respect to the spindle motor.