JP2004164733A - Optical disk drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk drive device capable of surely and efficiently cooling a pickup. <P>SOLUTION: In the casing 2 of an optical disk drive device 1, a chucking plate 6 for holding a recording disk 8 is attached to the tip part of the drive shaft 5 of a spindle motor 4. A pickup unit 10 for transferring information with the recording disk 8 is disposed on a side in which he spindle motor 4 is positioned with respect to the recording disk 8. The drive shaft 5 is provided with a blowing unit 12 for cooling the pickup unit 10. The blowing unit 12 has a blade fixed to the drive shaft 5 and a cover for covering the blade. The cover is provided with an opening for taking in ambient air, and a blowing port for directly blowing air toward the pickup unit. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disk drive, and more particularly, to an optical disk drive having a function of cooling a pickup.
[0002]
[Prior art]
An optical disk drive is used to read information recorded on a recording disk such as a CD (Compact Disc) or to record information on a recording disk. In the optical disk drive, in particular, when writing information, a recording disk is irradiated with a laser beam having a higher intensity.
[0003]
Therefore, there is a problem that the temperature of the pickup including the semiconductor laser that irradiates the laser beam easily rises, and the life of the semiconductor laser is shortened and the output of the semiconductor laser is likely to be unstable.
[0004]
In order to solve such a problem, a measure for controlling the output of the semiconductor laser in a software manner or providing a temperature sensor in a hardware manner has been adopted.
[0005]
However, such a measure complicates the device configuration and increases the temperature. On the contrary, an air-cooled optical disk drive device has been proposed to cool the pickup more easily.
[0006]
Therefore, as an example of such an optical disk drive device, an optical disk drive device (first related art) described in Patent Document 1 will be described.
[0007]
As shown in FIG. 6, in the housing 102 of the optical disk drive device 101, the recording disk 108 is fixed to the drive shaft of the rotary motor 104 by the upper surface clamper 110 and the lower surface clamper 109.
[0008]
The recording disk 108 rotates in synchronization with the rotation drive of the rotation motor 104. A predetermined pickup (not shown) is provided below the recording disk 108 (on the side where the rotary motor 104 is located).
[0009]
A blower fan 112 is formed on the upper surface clamper 110. The blower fan 112 rotates in synchronization with the rotation of the rotation motor 104. When the blower fan 112 rotates, the air in the optical disc drive device 101 is exhausted through the upper and lower ventilation holes 105 and 107, and the inside of the optical disc drive device 101 is cooled by inhaling the outside air.
[0010]
Next, as another example of the optical disk drive device, an optical disk drive device (second related art) described in Patent Document 2 will be described.
[0011]
As shown in FIG. 7, the pickup of the optical disk drive device 201 is a separation type optical pickup, and includes a fixed optical body 202 and a moving optical body 203. A laser diode (LD) 205, a light receiving element 206, a suction fan 207 having an air filter, and the like are provided in a housing 204 of the fixed optical body 202. Further, a cylindrical portion 208 is provided in a portion of the housing 204 from which the laser beam is emitted.
[0012]
On the other hand, the housing 209 of the moving optical body 203 has a through hole 210 for guiding the laser beam emitted from the fixed optical body 202 into the moving optical body 203, and a laser beam from the inside of the moving optical body 203 to the optical disk. And an optical system (not shown) for receiving the laser beam guided into the moving optical body 210 and irradiating the optical beam to the optical disk 212.
[0013]
The housing 209 has a closed structure in which air does not enter or exit except for the through hole 210 and the opening 211.
[0014]
External air is introduced into the housing 204 of the fixed optical body 202 via an air filter by a suction fan 207 provided on the fixed optical body 202. The introduced air cools the inside of the housing 204 and then blows out from the cylindrical portion 208 to the outside.
[0015]
The air ejected from the cylindrical portion 208 flows into the housing 209 of the moving optical body 203 through the through hole 210, cools the housing 209, and then flows out of the opening 211 to the outside.
[0016]
The air flowing out of the opening 211 hits the recording surface of the optical disk 212, and the air cools the components below the optical disk 212 and cleans the information track portion to be recorded and reproduced.
[0017]
[Patent Document 1]
JP 2001-23365A (page 2, FIGS. 1 to 5)
[0018]
[Patent Document 2]
JP-A-5-298934 (pages 3 to 4, FIGS. 1 to 6)
[0019]
[Problems to be solved by the invention]
However, the conventional optical disk drive has the following problems. First, in the first related art, the rotation of the blower fan 112 causes the air in the optical disk drive device 101 to be exhausted through the upper surface ventilation hole 105 and the bottom surface ventilation hole 107 and the outside air to be sucked in.
[0020]
At this time, there is a problem that the flow of the air in the portion where the pickup is located is hindered by the recording disk 108 located immediately above the pickup, and the air is not efficiently discharged out of the optical disk drive device 101.
[0021]
Further, in the optical disk drive device provided with a disk tray on which the recording disk 108 is mounted, there is a problem that the air near the pickup is more difficult to be exhausted by the disk tray.
[0022]
Next, in the second conventional technique, when air heated by heat in the fixed optical body 202 is sent to the movable optical body 203, there is a problem that the optical system cannot be efficiently cooled. Was.
[0023]
In addition, when the warmed air is sent into the moving optical body 203, there is a problem that heat is trapped in the moving optical body 203 and the optical system shifts. Furthermore, when the optical disc drive 201 is used in a relatively cold environment, there is a problem that warm air hits a lens of the optical system and water droplets are generated on the surface of the lens.
[0024]
The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical disk drive device in which a pickup is reliably and efficiently cooled.
[0025]
[Means for Solving the Problems]
One optical disk drive device according to the present invention includes a holding unit, a spindle motor, a pickup unit, and a blowing unit. The holding unit holds a predetermined recording medium. The spindle motor rotates the holding unit. The pickup unit operates information on the recording medium by irradiating the recording medium with predetermined light. The blower is driven by a driving force of a spindle motor, and blows air directly toward the pickup unit. The blower includes a blade attached to the drive shaft of the spindle motor, a cover covering the blade, an opening provided in the cover for taking in air outside the cover, and a cover. And an outlet opened toward the pickup unit.
[0026]
According to this structure, the air blown out from the outlet of the blower driven by the driving force of the spindle motor is directly blown to the pickup unit, and the pickup unit is efficiently cooled. Accordingly, it is possible to prevent the temperature of the pickup unit from becoming high, especially when writing information in which light having higher intensity is irradiated from the pickup unit to the recording medium. In addition, by efficiently cooling the pickup unit, the life of the pickup unit can be extended, and the output of predetermined light emitted from the pickup unit can be stabilized.
[0027]
Another optical disk drive device according to the present invention includes a driving unit, a pickup unit, and a blowing unit. The drive unit rotates a predetermined recording medium. The pickup unit operates information on the recording medium by irradiating the recording medium with predetermined light. The blowing unit is driven by the driving force of the driving unit, and cools the pickup unit by directly blowing air toward the pickup unit.
[0028]
According to this structure, the air is blown directly to the pickup unit from the blowing unit driven by the driving force of the spindle motor, and the pickup unit is efficiently cooled. Accordingly, it is possible to prevent the temperature of the pickup unit from becoming high, especially when writing information in which light having higher intensity is irradiated from the pickup unit to the recording medium. In addition, by efficiently cooling the pickup unit, the life of the pickup unit can be extended, and the output of predetermined light emitted from the pickup unit can be stabilized.
[0029]
The blower includes a blade attached to the drive shaft of the spindle motor, a cover covering the blade, an opening provided on the cover for taking in air outside the cover, and a cover. And a blow-out opening provided to the pickup unit and opened toward the pickup unit.
[0030]
Thus, the blade is rotated by the driving of the spindle motor, so that air is taken in from the opening and air is directly blown from the outlet to the pickup unit.
[0031]
More specifically, the blower is preferably a cross flow fan or a sirocco fan.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
An optical disk drive according to an embodiment of the present invention will be described. As shown in FIG. 1, a spindle motor 4 for rotating a recording disk 8 such as a CD is provided in a housing 2 of the optical disk drive device 1. A chucking plate 6 for holding a recording disk 8 is attached to the tip of the drive shaft 5 of the spindle motor 4.
[0033]
On the side where the spindle motor 4 is located with respect to the recording disk 8, a pickup unit 10 is provided. By irradiating the recording disk 8 with a predetermined laser beam by the pickup unit 10, information recorded on the recording disk 8 is read, or information is recorded on the recording disk 8.
[0034]
The drive shaft 5 of the spindle motor 4 is provided with a blower unit 12 for cooling the pickup unit 10. The blower unit 12 is disposed on the side where the pickup unit 10 is located with respect to the recording disk 8.
[0035]
A cross-flow fan will be described as an example of the blower unit 12. As shown in FIGS. 2 and 3, the blower unit 12 includes a blade 13 fixed to the drive shaft 5 of the spindle motor 4 and a cover 14 that covers the blade 13.
[0036]
The cover 14 is provided with an opening 15 for taking in ambient air and an outlet 16 for directly blowing out air toward the pickup unit 10.
[0037]
When the blade 13 is rotated by the rotation of the drive shaft 5, air is blown from the outlet 16 based on the pressure in the gap between the tip of the blade 13 and a specific portion of the cover 14. The air that has flowed out of the outlet 16 is blown directly to the pickup unit 10. Thereby, the pickup unit 10 is efficiently cooled.
[0038]
In the above-described optical disk drive, the air blown out by the blower unit 12 is directly blown to the pickup unit 10, so that the pickup unit 10 is efficiently cooled.
[0039]
This prevents the temperature of the pickup unit 10 including the semiconductor laser that irradiates the laser beam from becoming high, especially when writing information in which the recording disk 8 is irradiated with a stronger laser beam. be able to.
[0040]
In addition, by efficiently cooling the pickup unit 10, the life of the semiconductor laser can be extended, and the output of the semiconductor laser can be stabilized.
[0041]
In the above-described embodiment, a cross-flow fan has been described as an example of the blower unit 12. However, the blower unit 12 is not limited to a cross-flow fan. Any sirocco fan as shown in FIGS. 4 and 5 may be used as long as it can be blown.
[0042]
In the case of such a sirocco fan, the fan blade 23 rotates with the rotation of the drive shaft 5 of the spindle motor 4, and air is taken in from the opening 25 provided in the cover 24. The taken-in air blows out from an outlet 26 provided in a direction perpendicular to the drive shaft 5.
[0043]
The air blown out from the outlet 26 is blown directly to the pickup unit 10 as in the case of the cross flow fan, so that the pickup unit 10 is efficiently cooled.
[0044]
The embodiment disclosed this time is an example in all respects and should be considered as not being restrictive. The present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[0045]
【The invention's effect】
According to the optical disk drive device of the present invention, the air blown out from the outlet of the blower driven by the driving force of the spindle motor is directly blown to the pickup unit, and the pickup unit is efficiently cooled. Accordingly, it is possible to prevent the temperature of the pickup unit from becoming high when writing information in which the pickup unit is irradiated with light having higher intensity on the recording medium. In addition, by efficiently cooling the pickup unit, the life of the pickup unit can be extended, and the output of predetermined light emitted from the pickup unit can be stabilized.
[0046]
According to another optical disk drive device according to the present invention, air is directly blown from the blower driven by the driving force of the spindle motor to the pickup unit, and the pickup unit is efficiently cooled. Accordingly, it is possible to prevent the temperature of the pickup unit from becoming high when writing information in which the pickup unit is irradiated with light having higher intensity on the recording medium. In addition, by efficiently cooling the pickup unit, the life of the pickup unit can be extended, and the output of predetermined light emitted from the pickup unit can be stabilized.
[0047]
The blower includes a blade attached to the drive shaft of the spindle motor, a cover covering the blade, an opening provided on the cover for taking in air outside the cover, and a cover. And a blow-out opening provided to the pickup unit, the blow-out opening being directed toward the pickup unit, whereby the blade is rotated by driving the spindle motor, so that air is taken in from the opening and air is blown out from the blow-out opening. It is sprayed directly on the pickup unit.
[0048]
More specifically, the blower is preferably a cross flow fan or a sirocco fan.
[Brief description of the drawings]
FIG. 1 is a diagram showing an internal structure of an optical disk drive according to an embodiment of the present invention.
FIG. 2 is a plan view of the blower unit shown in FIG. 1 in the embodiment.
FIG. 3 is a side view of the blower unit shown in FIG. 1 in the embodiment.
FIG. 4 is a perspective view showing another example of the blower unit in the embodiment.
FIG. 5 is a side view showing the blower unit shown in FIG. 4 in the embodiment.
FIG. 6 is a sectional view of a conventional optical disk drive device.
FIG. 7 is a plan view of another conventional optical disk drive device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Optical disk drive device, 2 housings, 4 spindle motors, 5 drive shafts, 6 chucking plates, 8 recording disks, 10 pickup units, 12 blower units, 13 blades, 14, 24 covers, 15, 25 openings, 16 , 26 outlet, 23 fan blades.

Claims (5)

A holding unit for holding a predetermined recording medium,
A spindle motor for rotating the holding unit;
By irradiating the recording medium with predetermined light, a pickup unit for performing information operation on the recording medium,
Driven by the driving force of the spindle motor, including a blower that blows air directly toward the pickup unit,
The blower,
A blade portion attached to a drive shaft of the spindle motor;
A cover portion that covers the blade portion,
An opening provided in the cover portion for taking in air outside the cover portion,
An optical disk drive device, comprising: a cover provided in the cover portion; and an outlet opening toward the pickup unit. A drive unit for rotating a predetermined recording medium,
By irradiating the recording medium with predetermined light, a pickup unit for performing information operation on the recording medium,
An optical disk drive device, comprising: a blower unit driven by a driving force of the drive unit to directly blow air toward the pickup unit to cool the pickup unit. The blower,
A blade attached to a drive shaft of the spindle motor;
A cover portion that covers the blade portion,
An opening provided in the cover portion for taking in air outside the cover portion,
3. The optical disk drive device according to claim 2, further comprising a blowout port provided on said cover portion and opened toward said pickup unit. The optical disk drive device according to claim 2, wherein the blower is a cross flow fan. 4. The optical disk drive according to claim 2, wherein the blower is a sirocco fan.

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