JP3962310B2 - Disc cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording and / or reproducing disc, and more particularly to a disc cartridge that is applied to accommodate a flexible recording / reproducing optical disc in sheet form.
[0002]
[Prior art]
Today, information recording media using a disk-shaped medium include a magnetic disk, an optical disk, and a magneto-optical disk. There are various types of disk devices that use such a disk-shaped recording medium. Among them, one of them is a plurality of disks that are put in a cartridge, and any disk is selected from among the disks for recording / reproduction. There is a disc changer type in which it is taken out and recorded or reproduced, and for example, an automatic disc exchange type CD player is configured in this way.
[0003]
Further, as a disk device using a cartridge containing a plurality of disks as described above, a plurality of recording / reproducing units are provided, and the disks are individually taken out from the mounted cartridges to the plurality of recording / reproducing units. Development of a system that performs recording or reproduction on a plurality of disks simultaneously or selectively, for example, a disk player as an external storage device in a computer system is underway.
[0004]
Further, as a cartridge containing a plurality of discs, for example, a cartridge as shown in Patent Document 1 can be cited, and the cartridge main body and the partition between the discs are generally composed of thick rigid members. The invention described in Patent Document 1 is based on the assumption that the discs are separated by partition walls and the discs are taken out and stored.
[0005]
On the other hand, the present inventors, as Japanese Patent Application No. 2002-18323, use the aerodynamic force according to Bernoulli's law when performing recording / reproduction using a flexible sheet-like optical disc. Optical disk drive device, optical information recording device, optical information reproducing device, and optical information reproducing device that enable high-density recording by reliably preventing the occurrence of problems such as sliding contact with the objective lens A disc cartridge to be used was proposed.
[0006]
According to the invention of Japanese Patent Application No. 2002-18323, it is possible to avoid a problem such as a collision with a disk when a high NA lens is used, and to take advantage of the fact that the optical disk is thin, and to store a plurality of optical disks in a cartridge. As a result, a large recording capacity of 100 GB or more can be realized with a simple configuration with one cartridge.
[0007]
[Patent Document 1]
Japanese Patent No. 2722512 [0008]
[Problems to be solved by the invention]
In the invention of Japanese Patent Application No. 2002-18323, by stacking and storing a flexible sheet-like optical disc in one cartridge as described above, the configuration is thinner and simpler than that described in Patent Document 1, A large recording capacity of 100 GB or more can be realized, but a sheet-shaped optical disk is stored in the cartridge in a stacked state, and the specified optical disk is separated to prevent other optical disks from being damaged. It is necessary to move to the recording / playback unit.
[0009]
Further, in the invention of Japanese Patent Application No. 2002-18323, an optical pickup accesses and records / reproduces an optical disc by using a stabilizing member for suppressing surface blur by utilizing aerodynamic force according to Bernoulli's law. Therefore, the adhesion of dust and foreign matter on the sheet-like optical disk affects the operation and operation of the stabilizing member and the optical pickup depending on the degree of adhesion.
[0010]
The object of the present invention is to solve the above-mentioned problems of the prior art, facilitate the conveyance of a specified optical disk from among flexible sheet-like optical disks in a stacked state without complicating the configuration, and An object of the present invention is to provide a disc cartridge that can remove dust and the like adhering to the surface.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a disc cartridge in which a plurality of sheet-like flexible optical discs are stacked and stored, and each of the optical discs adjacent to one of the optical discs. The cleaning sheet for cleaning the surface of the optical disk is disposed so as to be in sliding contact with the other optical disk when the disk is taken out to the outside. With this configuration, the cleaning sheet is interposed between the stacked optical disks. As a result, a gap between the optical discs is secured, so that it is possible to prevent the optical discs from adhering to each other or to interfere with each other when sliding against another optical disc. In addition, the optical disk surface is easily cleaned by the cleaning sheet when the optical disk is moved. Packaging is carried out.
[0012]
According to a second aspect of the present invention, in the disc cartridge according to the first aspect, the cleaning sheet is attached to a substantially central portion of the optical disc. With this configuration, the center that is not related to the recording surface of the optical disc is provided. A cleaning sheet can be provided in the portion.
[0013]
According to a third aspect of the present invention, in the disk cartridge according to the second aspect, the cleaning sheet is provided on at least one of the recording surface side of the optical disk and the opposite surface side of the recording surface. Features.
[0014]
According to a fourth aspect of the present invention, in the disk cartridge according to any one of the first to third aspects, the cleaning sheet is a non-woven fabric. With this configuration, the cleaning sheet is separated from the cleaning sheet by sliding contact with the optical disk. Problems such as spattering of cloth pieces can be prevented.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0016]
FIG. 1 is an enlarged configuration diagram showing an optical disk housed in a disk cartridge for explaining an embodiment of the present invention, and FIG. 2 is a perspective view showing an optical disk housed state in the disk cartridge of this embodiment.
[0017]
In FIG. 1, an optical disc 1 has a recording layer 3 formed on one surface of a flexible substrate 2, and further a protective layer 4 formed on the surface of the recording layer 3. The entire disc is sheet-like and flexible. It has sex.
[0018]
More specifically, a thin sheet having a thickness of about 0.1 mm is used as a substrate to provide flexibility. For example, a 80 μm thick sheet made of polyethylene terephthalate has a stamper pitch of 0.6 μm and a width by thermal transfer. A 0.3 μm groove was transferred, and then the sheet / Ag reflective layer was formed by sputtering to 120 nm / (ZrO ₂ —Y ₂ O ₃ ) —SiO ₂ , 7 nm / AgInSbTeGe, 10 nm / ZnS—SiO ₂ , 25 nm / Si ₃ N _The film was formed in the order of No. _4. This sheet was spin coated with UV resin, cured by ultraviolet irradiation to form a transparent protective film with a thickness of 5 μm, and this disk was recorded with a large-diameter laser beam. The reflectance is increased by melt crystallization of the layer.
[0019]
Further, in each optical disc 1 of the present embodiment, the cleaning sheet 5 is stuck on the upper and lower surfaces of the substantially central portion of the disc outside the recording layer 3 region. As the cleaning sheet 5, various materials can be used. In this example, a nonwoven fabric made of nylon fibers is used so that cloth pieces and the like are not scattered by sliding contact with the optical disk 1. The thickness is about 0.3 mm.
[0020]
As shown in FIG. 2, in the present disk cartridge, a plurality of optical disks 1 (nine examples are illustrated in the figure) are stored in a cartridge case 6 so as to be directly stacked. A lid (not shown) or the like is detachably provided at the opening of the cartridge case 6 in order to prevent the optical disc 1 from falling off.
[0021]
The optical disk 1 is in a stacked state in the cartridge case 6, but as shown in FIG. 3A, cleaning sheets 5 are provided on the upper and lower surfaces of the substantially central portion of each optical disk 1. Due to the presence of the cleaning sheet 5, when the optical disc 1 designated by the user is separated and conveyed from the stacked optical disc 1 as described later, as shown in FIG. The sheet 5 slides with respect to the other adjacent optical disk 1, and dust, dirt, etc. adhering to the disk surface can be removed. Further, since a gap is formed between the optical discs 1 by the cleaning sheet 5, interference with other optical discs 1 during movement is suppressed, and sticking of discs that are likely to occur in the sheet-like thin optical disc 1 is performed. Separation and transportation are facilitated, such as preventing occurrence of defects.
[0022]
FIG. 4 is a configuration diagram of a disk drive device provided with a disk changer mechanism for taking out and transporting a specified one of the optical disks loaded as described above, and 10 is pulled out from the cartridge case 5. The optical disk groups 11a and 11b installed in a loaded state at a predetermined set position in the apparatus are installed so that the chucking ends face each other, chuck one optical disk 1 and rotate in the circumferential direction. Rotating rotary shaft that can be moved up and down, 12 is an optical pickup that collects a light spot on the optical disc 1 and performs recording / reproduction, and 13 is an optical disc 1 chucked by the rotating shafts 11a and 11b. The optical disc 1 is opposed to the optical pickup 12 by utilizing the air flow pressure (Bernoulli's law) when the disc rotates. Stabilizing member for stabilizing the surface vibration in the portion, 14 is a pinch roller pairs for conveying the optical disc 1 between the rotary shaft 11a, 11b.
[0023]
Reference numerals 15 and 16 denote a pickup roller and a pinch roller which are provided at the set position of the optical disk group 10 and separate and feed the optical disk 1 one by one. The pickup roller 15 and the pinch roller 16 are rotatable and can be rotated in the radial direction of the disk. It can move along, and is configured to move up and down while in contact with each other. As shown in FIG. 5, the pickup roller 15 has a central hole 18 in the hollow rubber member 17 serving as an air suction passage. Further, the central hole 18 and the outside communicate with a part of the hollow rubber member 17. In addition, a suction port 19 for sucking the optical disk 1 by air suction is provided.
[0024]
FIGS. 6 to 11 are explanatory views of the operation of the disk drive device having the above-described configuration. First, as shown in FIG. 6, the pickup roller 15 located at the upper position is also set at the upper position. In contact with the lowermost optical disk 1 of the group 10, the lowermost optical disk 1 is rotated by the suction action of the suction port 19, and moves in the inner diameter direction (arrow A direction) of the optical disk 1.
[0025]
As shown in FIG. 7, the optical disk 1 adsorbed by the pickup roller 15 is sandwiched between the pinch roller 16 so as to be wound around the rotating pickup roller 15, and the leading end is conveyed in the nip N direction of the pinch roller pair 14. Is done. The pinch roller pair 14 is started and rotated before the front end of the optical disk 1 arrives.
[0026]
When the optical disk 1 reaches the pair of pinch rollers 14, as shown in FIG. 8, the optical disk 1 is sent to the gap between the rotating shafts 11a and 11b in a separated state (in the direction of arrow A), and the front end of the optical disk 1 is an optical pickup. 12 and the stabilizing member 13 are sent to the facing gap.
[0027]
Further, as shown in FIG. 9, when the optical disc 1 is sent to a predetermined set position for recording / reproduction, the rotation shafts 11a and 11b come close to each other and sandwich the center of the optical disc 1 to start rotational driving. When the optical disk 1 is rotated, the stabilizing member 13 utilizing the pressure of the air flow acts to stabilize the surface blur on the optical disk 1, and recording is performed by the optical pickup 12 that is placed opposite to the stabilizing member 13 via the optical disk 1. / Playback operation will be performed.
[0028]
In the state shown in FIG. 9, the optical disk group 10 moves to the lower position (arrow B direction), and the pickup roller 15 and the pinch roller 16 also move to the lower position (arrow C direction). It waits at a set position for returning 1 to the optical disk group 10.
[0029]
When the optical disk 1 is returned from the state shown in FIG. 9 to the optical disk group 10, as shown in FIG. 10, the rotating shafts 11a and 11b are separated from each other, and the pinch roller pair 14 rotates in the reverse direction. In the direction (in the direction of arrow D), sucked by the suction port 19, and wound around the pickup roller 15. Then, the rotation of the pickup roller 15 stops when the tip of the optical disk 1 reaches the nip N between the pickup roller 15 and the pinch roller 16, and thereafter, only the pinch roller pair 14 rotates as shown in FIG. Then, when the optical disc 1 is sent out, the optical disc 1 is returned so as to ride on the optical disc group 10.
[0030]
Further, in order to take out one designated optical disk 1 from the optical disk group 10, the recording / reproducing operation is not performed with the rotation shafts 11a and 11b being separated from the non-designated optical disk 1, The feeding and returning operations of the optical disc 1 as described with reference to FIGS. 6 to 11 are repeated, and when the designated optical disc 1 is set at the position shown in FIG. 8, it is held between the rotating shafts 11a and 11b. Then, the recording / reproducing operation by the optical pickup 12 is performed.
[0031]
During the movement of the optical disk by the disk drive device as described above, each optical disk 1 is cleaned by the cleaning sheet 5.
[0032]
As shown in FIG. 1, the optical disk 1 in the above embodiment is provided with the cleaning sheet 5 at the center of the disk. Further, it may be provided on at least one of the flexible substrate 2 and the recording layer 3.
[0033]
【The invention's effect】
As described above, according to the present invention, since the cleaning sheet is interposed between the optical disks stored in the disk cartridge and stacked, a gap is secured between the optical disks. Alternatively, it is possible to suppress problems such as interference when sliding with respect to another optical disk, the specified optical disk is easily separated and conveyed, and the optical disk is moved by a cleaning sheet when the optical disk is moved. The effect is great at the time of actual use of a flexible sheet-like optical disk, such as surface cleaning.
[Brief description of the drawings]
FIG. 1 is an enlarged configuration diagram showing an optical disk stored in a disk cartridge for explaining an embodiment of the present invention. FIG. 2 is a perspective view showing an optical disk storage state in the disk cartridge of the present embodiment. FIG. 4 is an explanatory diagram of cleaning during transportation of an optical disk in the present embodiment. FIG. 4 is a diagram of a disk drive apparatus equipped with a disk changer mechanism for taking out a specified one of the optical disks stored in the optical disk cartridge of the present embodiment. FIG. 5 is a cross-sectional view showing the configuration of a pickup roller in the disk drive device of FIG. 4. FIG. 6 is an explanatory diagram of the operation of the disk drive device of FIG. 4. FIG. FIG. 8 is an explanatory diagram of the operation of the disk drive device of FIG. 4. FIG. 9 is an explanatory diagram of the operation of the disk drive device of FIG. It illustrates operation of the fourth disk drive device 11 is an explanatory view of a state where the optical disk is returned to the optical disk group in the disk drive in FIG. 4 EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Optical disk 2 Flexible substrate 3 Recording layer 5 Cleaning sheet 6 Cartridge case

Claims (4)

In a disk cartridge in which a plurality of sheets of flexible optical disks are stacked and stored,
A disc cartridge, wherein a cleaning sheet is provided on each of the optical discs so that when one of the adjacent optical discs is taken out, the surface of the optical disc is slidably contacted with the other optical disc. 2. The disc cartridge according to claim 1, wherein the cleaning sheet is attached to a substantially central portion of the optical disc. 3. The disc cartridge according to claim 2, wherein the cleaning sheet is provided on at least one of a recording surface side and an opposite surface side of the recording surface of the optical disc. The disk cartridge according to claim 1, wherein the cleaning sheet is a non-woven fabric.

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