JP2009230785A - Disk rotation stabilization plate, disk recording/playback device, and disk medium separation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of lifting only a disk medium without lifting a spacer or a disk rotation stabilization plate when the disk medium is lifted from the spacer on the disk rotation stabilization plate. <P>SOLUTION: A recess is disposed in a disk rotation stabilization plate so as to form a space surrounded by a disk medium and the disk rotation stabilization plate and having an opening exposed to an atmosphere when the disk medium is loaded on the disk rotation stabilization plate having a flexible disk medium loaded thereon and rotated integrally with the disk medium. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus using a flexible disk medium as a recording medium, and to a disk rotation drive system of such a recording / reproducing apparatus. In particular, it is integrated on a disk rotation stabilization plate and a disk rotation stabilization plate for stabilizing fluctuations in the rotation axis direction of a flexible disk medium by a pressure difference of air flow based on Bernoulli's law. The present invention relates to a disk rotation drive system provided with spacers arranged in the manner described above.

  In general, in a rewritable optical disk such as a phase change optical disk, information is recorded / reproduced by irradiating a recording film with laser light and changing optical characteristics such as reflectivity and optical phase of the recording film. As such an optical disc, DVD-RW and DVD-RAM are generally used, and HD DVD-RAM, HD DVD-RW, and the like are becoming widespread as optical discs capable of further increasing the capacity.

  In addition, with the rapid progress of the information society in recent years, it has become essential to record and reproduce a huge amount of information. As one means for satisfying such a demand, a plurality of the above-mentioned optical discs are contained in a cartridge. A collective device that stores a plurality of cartridges and includes a plurality of cartridges has been proposed. However, since these aggregate devices are as thick as 1.2 mm per optical disk, the size of the device itself storing these cartridges becomes considerably large.

  In order to solve these problems, the thickness of each optical disk is reduced to 0.3 mm or less, and a cartridge for storing these optical disks or a thin optical disk recording / reproducing apparatus in which the size of the collecting apparatus is compactly combined. Has been proposed.

  For example, in Patent Document 1, optical disks are arranged and stored one by one on a partition sheet, and a desired optical disk is selected from the optical disks stored in each partition sheet when recording and reproducing information. A system is disclosed in which an L-shaped claw installed at the tip of the transport arm is hooked into an inner peripheral hole provided in the inner periphery of the disc and transported to the recording / reproducing unit.

  Further, in order to stabilize the rotation of the optical disk transported to the recording / reproducing unit by the above-described transport method, the disk using a mechanism that stabilizes the fluctuation in the rotation axis direction of the optical disk medium by the pressure difference of the air flow based on Bernoulli's law. Japanese Patent Application Laid-Open No. H10-228667 discloses a posture control during rotation and a recording / reproducing operation.

JP 2005-310194 A JP2007-12204

  According to the technique described in Patent Document 1, in order to handle a disc inner peripheral hole with a claw when transporting the disc, the inner peripheral hole of a thin thin optical disc may depend on the magnitude of the force applied to the claw. It turns out that the problem of deformation occurs.

  In order to suppress the deformation problem of the inner peripheral hole of such a thin optical disk, the thin optical disk is adsorbed by negative pressure control using a suction pad instead of hooking the inner peripheral hole with a nail and handling it. Means for moving the image are also proposed.

  Further, a method has been proposed in which an optical disk is recorded and reproduced using the method described in Patent Document 2 and then transported to a disk tray by the vacuum suction method as described above.

  Referring to FIG. 6, the spacer 31 is integrally disposed on the transparent disk rotation stabilization plate 30, and the thin optical disk 4 is disposed on the spacer 31. Consider the case where the thin optical disk 4 is picked up by the suction pad 10 and lifted from the spacer 31.

  Next, the EF cross section of FIG. 6 illustrated in FIG. 7 will be referred to. When the suction pad 11 sucks the thin optical disk 4, the thin optical disk 4 is deformed into the same shape as the suction pad 11, so that a new space 52 is created between the spacer 31 and the thin optical disk 4, but the space 52 is opened to the atmosphere. Negative pressure is generated. For this reason, it has been found that when the thin optical disk 4 is sucked, the spacer 31 and, in turn, the disk rotation stabilizing plate 30 integrated with the spacer 31 are lifted at the same time, which causes a conveyance error.

  The present invention has been made in view of such problems, and the problem to be solved by the present invention is to lift the spacer and the disk rotation stabilization plate when lifting the disk medium from the spacer on the disk rotation stabilization plate. It is to provide a technique capable of lifting only the disk medium without any problem.

  In order to solve the above-described problems, the present invention provides the following techniques.

  First, as one aspect of the present invention, in a disk rotation stabilizing plate on which a flexible disk medium is placed and rotated together with the disk medium, when the disk medium is placed, at least the disk medium and the disk rotation stabilizing plate There is provided a disk rotation stabilization plate comprising at least one concave portion forming a space surrounded by a disk.

  As another aspect of the present invention, there is provided a disk recording / reproducing apparatus that includes such a disk rotation stabilizing plate and performs reading or writing using the disk medium as a recording medium.

  Furthermore, as another aspect of the present invention, in a method of separating a disk medium placed on a disk rotation stabilization plate that rotates together with a flexible disk medium from the disk rotation stabilization plate, the disk rotation stabilization is performed. The plate is provided with at least one recess that forms a space surrounded by at least the disc medium and the disc rotation stabilization plate when the disc medium is placed, and is one of the disc media positioned on the recess. The suction part is picked up and lifted, and the inflow stage in which air flows into the space formed by the recess through the flow path including the space between the disk medium and the disk rotation stabilization plate, and the entire disk medium is rotated. And a step of separating from the stabilizing plate.

  According to the present invention, when the disk rotation is lifted from the disk rotation stabilization plate by providing the disk rotation stabilization plate with a recess that forms a space surrounded by the disk medium and the disk rotation stabilization plate, the disk medium The air flows into the recess through a flow path including a gap between the disk and the disk rotation stabilization plate. Due to the presence of the recess, air efficiently flows from the gap between the disk medium and the disk rotation stabilization plate, so that negative pressure can be prevented from being generated between the disk medium and the disk rotation stabilization plate. . As a result, it is possible to prevent the disk medium and the disk rotation stabilizing plate from coming into close contact with each other due to negative pressure.

  The problem that the disk medium is difficult to come off due to tight contact with the disk rotation stabilizing plate is particularly likely to occur with a thin disk medium. The thin disk medium is particularly suitable for a multi-continuous disk recording / reproducing apparatus that accommodates a plurality of disk media and replaces the disk medium placed on the disk rotation stabilizing plate by an autochanger. Therefore, the present invention is also particularly suitable for a disk recording / reproducing apparatus using a thin disk medium and a multi-continuous type disk recording / reproducing apparatus.

  Hereinafter, the present invention will be described with reference to examples.

  An optical disk rotation drive system 1 according to an embodiment of the present invention will be described with reference to FIG. The optical disk rotation drive system 1 is set on the disk rotation stabilization plate 2 via the transparent disk rotation stabilization plate 2, the spacer 3 integrally disposed on the disk rotation stabilization plate 2, and the spacer 3. A thin optical disk 4, a magnet chuck 5 for fixing the thin optical disk 4 to a rotating system including the disk rotation stabilizing plate 2 and the spacer 3, a spindle motor 6 for rotating the rotating system, and a light for writing information to or reading information from the thin optical disk 4. A head 7 is provided.

  Referring to FIG. 2, the spacer 3 includes a notch 8 as a recess. In addition, a vent hole 9 is provided in the inner peripheral portion of the disk rotation stabilization plate 2 for stabilizing fluctuations in the rotation axis direction of the optical disk by a pressure difference of the air flow based on Bernoulli's law. The three suction portions 10 described concentrically with the spacer 3 schematically show the locations where the suction pads of the transport arm (not shown) contact each other when transporting the thin optical disk 4 from the optical disk rotation drive system 1. It is. When the thin optical disk 4 is actually transported, since the thin optical disk 4 is mounted on the optical disk rotation drive system 1, the suction pad does not directly touch the suction portion 10 but contacts the thin optical disk 4. become.

  As shown in FIG. 2, the spacer 3 is provided with a plurality of cutout portions 8 on the same circumference as the suction portion 10, and the area of the cutout portion 8 is smaller than the area of the suction portion 10. In the present embodiment, the notch 8 is arranged by dividing the circumference concentric with the suction portion 10 into 16 equal parts. The notch 8 has an opening along the side surface of the spacer 3 and the end is open to the atmosphere. Therefore, when the suction pad sucks the thin optical disk 4 by a mechanism as will be described later, There is no risk of simultaneously adsorbing the spacers 3 to be attracted.

  The spacer 3 and the thin optical disk 4 when the thin optical disk 4 is sucked by the suction pad will be described with reference to FIG. FIG. 3 shows a state immediately after the suction pad 11 is attracted to the suction part 10 on the thin optical disk 4 mounted on the spacer 3 and the lifting is started. When the suction pad 11 vacuum-sucks the thin optical disk 4, the thin optical disk 4 is bent into a substantially U shape, and a space 12 is formed between the suction pad 11 and the thin optical disk 4, and the space between the thin optical disk 4 and the spacer 3 is formed. Creates a space 13.

  At this time, since the space formed by the notch 8 exists on the spacer 3, air efficiently flows into the notch 8 using the gap between the thin optical disk 4 and the spacer 3 as a flow path. Thereby, it is possible to prevent a closed space from being generated between the thin optical disk 4 and the spacer 3. As a result, the spacer 3 can be prevented from being lifted together when the thin optical disk 4 is attracted and lifted.

  In particular, as shown in FIG. 2, the notch 8 is formed so that the outer peripheral end of the spacer 3 is open to the atmosphere. Therefore, when the suction pad 11 lifts the thin optical disk 4, it opens from the surface direction of FIG. Air can flow more efficiently through the section. For this reason, a closed space is not formed between the spacer and the thin optical disk as in the example shown in FIG. 7, and the spacer is not lifted together with the thin optical disk 4 by the negative pressure of the closed space. The suction pad 11 can suck only the thin optical disk 4.

  The reason why the notches 8 are evenly arranged on the circumference is that the suction pad 11 is fixed, and the spacer 3 integrated with the disk rotation stabilizing plate 2 rotates together with the thin optical disk 4, so that the suction part This is because the position of 10 is not constant. By arranging the notches 8 evenly on the circumference, the same effect can always be obtained regardless of the positional relationship between the suction portions 10 and the individual notches 8.

  When the thin optical disk 4 is sucked, the tip of the suction pad 11 is pressed against the thin optical disk 4. At this time, if the thin optical disk 4 corresponding to the suction portion 10 is not sufficiently supported by the spacer 3, the suction is not performed. There is a risk of becoming insufficient. Therefore, the area of the notch 8 is made smaller than the area of the suction part 10. In this way, a flat portion that is not a concave portion exists on the surface of the spacer 3 corresponding to the portion immediately below the suction portion 10, and the thin optical disk 4 corresponding to the suction portion 10 is supported by the flat portion. Therefore, the tip of the suction pad 11 can be firmly pressed against the thin optical disk 4 and a sufficient suction force can be obtained.

  In Example 1, the spacer 3 was provided with a notch 8 having an opening at the outer peripheral end of the spacer 3 as a recess. That is, the space formed between the spacer 3 and the thin optical disk 4 when the thin optical disk 4 is lifted is opened to the atmosphere by a flow path formed in the radial direction of the rotation axis of the thin optical disk 4. On the other hand, in the optical disk rotation drive system of the second embodiment, as shown in FIG. 4, the through hole 23 penetrating the disk rotation stabilizing plate 21 and the spacer 22 is provided as a recess, so that it is formed in the direction of the rotation axis. The air is released through the flow path.

  Further description will be given with reference to FIG. In FIG. 5, the suction pad 11 and the thin optical disk 4 are also shown for convenience. The thin optical disk 4 is sucked by the suction pad 11 and is deformed into a substantially square shape following the shape of the suction pad. By this deformation, a space 24 is formed between the thin optical disk 4, the spacer 22, and the disk rotation stabilization plate 21. Since the through-hole 23 is formed under the space 24, the space 24 does not form a closed space and is in a state of being released to the atmosphere. Therefore, when the suction pad 11 lifts the thin optical disk 4, no negative pressure is generated between the thin optical disk 4 and the spacer 22, and it is possible to prevent the spacer 22 from being lifted together with the thin optical disk 4. The pad 11 can smoothly perform suction and conveyance of the thin optical disk 4.

  As mentioned above, although this invention was demonstrated according to embodiment and an Example, this invention is not limited to this, Of course, it can add freely within the technical scope of this invention. It is.

  For example, in the embodiments and examples, the case where an optical disk is used as a disk medium has been described. However, it will be apparent to those skilled in the art that the present invention can be applied to a magnetic disk, for example.

  Further, the shape, arrangement, and number of the recesses such as the notch 8 and the through hole 23 can be appropriately changed depending on the shape, arrangement, and number of the suction pads 11.

  In the first embodiment, the notch 8 is provided in the spacer 3 and not in the disk rotation stabilization plate 2, but may be provided in both the spacer 3 and the disk rotation stabilization plate 2.

  Moreover, it is good also as providing an unevenness | corrugation in the surface of a spacer. For example, by providing a large number of small irregularities on the spacer surface, a large number of small spaces are formed between the spacer and the thin optical disk, and these spaces are connected to form a space that is open to the atmosphere. An effect is obtained.

  The present invention relates to a disk rotation drive system that uses adsorption of a disk medium when the disk medium is conveyed from the disk rotation drive system, and the suction is performed when the disk medium is fixed to the disk rotation drive system. Note that it is not used.

It is a figure for demonstrating the optical disk rotational drive system 1 which concerns on Example 1 of this invention. It is a figure for demonstrating the periphery of the rotating shaft of a rotation system when the optical disk rotation drive system 1 is seen from the state where the thin optical disk 4 was removed. It is a figure for demonstrating the mode of the AB cross section of FIG. 2 when the thin optical disk 4 mounted on the spacer 3 is lifted with the suction pad. It is a figure for demonstrating the through-hole 23 provided in the spacer 22 and the disk rotation stabilization board 21 in Example 2 of this invention. FIG. 5 is a diagram for explaining a state when the CD cross section of FIG. 4 is viewed from the direction of the arrow illustrated in FIG. 4 when the thin optical disk 4 placed on the spacer 22 is lifted by a suction pad. . It is a figure for demonstrating the disk rotation stabilization board 30 and the spacer 31 of the conventional optical disk rotational drive system. It is a figure for demonstrating the mode of the EF cross section of FIG. 6 when the thin optical disk 4 mounted on the spacer 31 is lifted with the suction pad.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk rotation drive system 2, 21 Disk rotation stabilization board 3, 22 Spacer 4 Thin optical disk 5 Magnet chuck 6 Spindle motor 7 Optical head 8 Notch part 9 Vent hole 10 Adsorption part 11 Adsorption pad 12, 13, 24, 25 Space 23 Through hole

Claims (18)

In a disk rotation stabilization plate that carries a disk medium having flexibility and rotates together with the disk medium,
A disk rotation stabilization plate comprising at least one recess that forms a space surrounded by at least the disk medium and the disk rotation stabilization plate when the disk medium is placed.   2. The disk rotation stabilization plate according to claim 1, wherein the recess has an opening that is open to the atmosphere in a state where the disk medium is placed. In the disk rotation stabilization plate according to any one of claims 1 and 2,
Stabilizing the rotation of the disk medium by an air flow generated in a gap between the disk medium and the disk rotation stabilization plate when the disk medium and the disk rotation stabilization plate rotate;
A spacer for providing the gap with the disk medium;
The disk rotation stabilizing plate, wherein the spacer includes at least one recess that forms a space surrounded by at least the disk medium and the spacer when the disk medium is placed.   4. The disk rotation stabilization plate according to claim 2, wherein the opening is provided on a side surface of the disk rotation stabilization plate or the spacer.   5. The disk rotation stabilization plate according to claim 1, wherein the concave portion is the disk rotation stabilization plate or a through hole provided in both the disk rotation stabilization plate and the spacer. A disc rotation stabilization plate characterized by   6. The disk rotation stabilization plate according to claim 1, wherein the disk medium is an optical disk, and the disk rotation stabilization plate transmits light used for reading or writing the disk medium. A disk rotation stabilizing plate characterized by having a property.   7. The disk rotation stabilization plate according to claim 1, further comprising a plurality of recesses on a circumference coaxial with a rotation axis of the disk rotation stabilization plate. .   8. The disk rotation stabilizing plate according to claim 1, wherein the area of the area corresponding to one of the recesses on the disk medium is one of means for adsorbing the disk medium and the disk medium. A disk rotation stabilization plate characterized by being smaller than the area of the area where the contact is made.   A disk recording / reproducing apparatus comprising the disk rotation stabilizing plate according to claim 1, wherein the disk recording / reproducing apparatus performs reading or writing using the disk medium as a recording medium. The disc recording / reproducing apparatus according to claim 9, wherein
Comprising at least one means for adsorbing the disk medium to lift the disk medium from the disk rotation stabilizing plate;
The disk recording / reproducing apparatus according to claim 1, wherein the sucking means sucks at least a part of an area on the concave portion of the disk medium. In the method of separating the disk medium placed on the disk rotation stabilization plate rotating together with the disk medium having flexibility from the disk rotation stabilization plate,
The disk rotation stabilization plate comprises at least one recess that forms a space surrounded by at least the disk medium and the disk rotation stabilization plate when the disk medium is placed thereon,
While adsorbing and lifting a part of the disk medium positioned on the recess, the space formed by the recess is formed through a flow path including a space between the disk medium and the disk rotation stabilization plate. An inflow stage where air flows in;
Separating the entire disk medium from the disk rotation stabilizing plate. The disk medium separation method according to claim 11, wherein
The recess has an opening that is open to the atmosphere with the disk medium placed thereon,
In the inflow step, the air flows into the space formed by the recess using the space between the disk medium and the disk rotation stabilizing plate and the opening as a flow path, and the disk medium separating method. The disk medium separation method according to any one of claims 11 and 12,
The disk rotation stabilization plate stabilizes the rotation of the disk medium by an air flow generated in a gap between the disk medium and the disk rotation stabilization plate when the disk medium and the disk rotation stabilization plate rotate. Which
A spacer for providing the gap with the disk medium;
The disk medium separating method according to claim 1, wherein the spacer includes at least one recess that forms a space surrounded by at least the disk medium and the spacer when the disk medium is placed.   14. The disk medium separating method according to claim 12, wherein the opening is provided on a side surface of the disk rotation stabilizing plate or the spacer.   15. The disk medium separating method according to claim 11, wherein the recess is a disk rotation stabilizing plate or a through hole provided in both the disk medium separating method and the spacer. Disc medium separation method.   16. The disk medium separating method according to claim 11, wherein the disk medium is an optical disk, and the disk rotation stabilizing plate is transmissive to light used for reading from or writing to the disk medium. A disk medium separating method comprising:   17. The disk medium separation method according to claim 11, further comprising a plurality of the recesses on a circumference coaxial with a rotation axis of the disk rotation stabilization plate.   18. The disk medium separating method according to claim 11, wherein an area corresponding to one of the recesses on the disk medium placed on the disk rotation stabilizing plate or the spacer is the disk medium. A disc medium separating method, wherein the area is smaller than one area of a region to be adsorbed when lifting the disc.

Images