JP2005044401A - Recording/reproducing apparatus, and disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To satisfactorily reduce disk surface vibration at a recording/reproducing position with a simple constitution of a main stabilizing member and an auxiliary stabilizing member that cause Bernouilli effect to act by making aerodynamic action force act on a recording disk without contacting and sliding of the auxiliary stabilizing member with the recording disk. <P>SOLUTION: A main configuration of an action surface which generates the aerodynamic action force to an optical disk 1 in auxiliary stabilization member 6 is made a convex one which is directed to the optical disk 1, and in the state where the optical disk 1 is stabilized, the action surface is adjusted so that the amount of a gap at the time when the action surface and the optical disk 1 move closest to each other is set to at least 1 μm. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording / reproducing apparatus that performs recording and / or reproducing processing on a flexible recording disk, and a disk cartridge that houses a flexible recording disk.
[0002]
[Prior art]
In recent years, there has been a demand for information recording media to record large volumes of digital data, such as the start of digitization of television broadcasting. For example, in the field of optical discs, one of the basic methods for increasing the density is to reduce the diameter of the light spot collected on the optical disc for recording / reproduction (hereinafter referred to as an optical disc). As a representative example, the recording disk used in the recording / reproducing apparatus targeted by the present invention is intended for all the disk-shaped recording disks such as phase change memory, magneto-optical memory, hologram memory, etc. Not limited to optical discs).
[0003]
For this reason, in increasing the density of the optical disk, it is effective to shorten the wavelength of light used for recording / reproduction and increase the numerical aperture NA of the objective lens. As for the wavelength of light, a wavelength of near infrared light of 780 nm is used for CD (compact disk), and a wavelength of about 650 nm of red light is used for DVD (digital versatile disk). Recently, a blue-violet semiconductor laser has been developed, and it is expected that a laser beam of around 400 nm will be used in the future.
[0004]
As for the objective lens, it was less than NA0.5 for CD, but it is about NA0.6 for DVD. In the future, it is required to further increase the numerical aperture (NA) to NA or more 0.7. However, increasing the NA of the objective lens and shortening the wavelength of light also increase the influence of aberrations when focusing light. Therefore, the margin for the tilt of the optical disk is reduced. Further, since the depth of focus is reduced by increasing the NA, the focus servo accuracy must be increased.
[0005]
In addition, since the distance between the objective lens and the recording surface of the optical disk is reduced by using a high NA objective lens, the optical disc surface blur must be kept small before the focus servo at the start is pulled. The objective lens and the optical disk may collide, causing a pickup failure.
[0006]
As a short-wavelength, high-NA high-capacity optical disk, for example, as described in Non-Patent Document 1, a recording film is formed on a substrate that is as thick as a CD and has high rigidity, and is used for recording / reproducing light. Has been proposed which records / reproduces data on / from a recording film through a thin cover layer without passing through the substrate.
[0007]
Further, Patent Documents 1 to 3 and Non-Patent Document 1 have flexibility in opposition to a stabilizing member in order to stabilize surface blurring in an optical disk by utilizing aerodynamic action force according to Bernoulli's law. There is a description of a recording / reproducing apparatus configured to rotate an optical disk or a flexible optical disk.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-105657 [Patent Document 2]
Japanese Patent Laid-Open No. 10-308059 [Patent Document 3]
JP 2003-115108 A [Non-Patent Document 1]
O PLUS E Vol. 20, No. 2, P.E. 183
[0009]
[Non-Patent Document 2]
“Optical Lead-Out of Video Disc”, “EITA TRANSPORTATION ON CONSUMER ELECTRONICS”, November 1976, P.I. 304-308
[0010]
[Problems to be solved by the invention]
However, in the prior art, when the substrate of the optical disk is formed of a rigid body, in order to reduce surface deflection and tilt in the rotating optical disk, extremely accurate molding is performed and recording is performed at a low temperature so that thermal deformation does not occur. A film must be deposited. This prolongs the tact time associated with optical disc manufacture and increases costs.
[0011]
Further, as described in Patent Documents 1 and 2, the method of rotating a flexible optical disk on a stabilizing plate has a high risk of sliding between the optical disk and the stabilizing plate. There is a problem that the surface of the chemical plate is damaged. This sliding causes dust generation, which causes an error.
[0012]
In particular, as described in Patent Document 1, when the recording film is present on the stabilizing plate side, the recording film of the optical disk is damaged by sliding, and an error is directly caused. Moreover, there is a limit to the effect of reducing the disk surface blurring simply by using a flat stabilizer, and the risk of collision between the objective lens and the disk is still a problem when using a high NA objective lens. It remains.
[0013]
As one of the methods using the stabilization plate, there is a method as described in Non-Patent Document 2, but it is the same as the above technique in terms of the configuration of using a planar stabilization plate, and the same problem Is expected to occur. In this method, it is assumed that an aerodynamic force acts between a stabilizing plate called “smoothing plates” and the disc. For example, the direction in which the disc is separated from the stabilizing plate. If the shape is warped, the aerodynamic force does not act effectively, and the disc surface blur cannot be controlled. In addition, since the aerodynamic force is generated by utilizing the phenomenon that the disk hangs down due to gravity, it cannot cope with the vertical placement of the drive device.
[0014]
As one means for solving these problems, the present inventor uses a columnar stabilization guide member whose surface facing the optical disc forms an arc shape in Patent Document 3 and the like, and a stabilization guide member in the optical disc. A region where no air pressure action is generated (a space without a stabilizing guide member) is provided on the upstream and downstream sides of the disk rotation direction at the part where the surface shake due to the air pressure action is stable. An invention that increases the effect of the stabilizing force by aerodynamic force by reducing the repulsive force in the optical disc at the portion where the surface blurring is stabilized by making the optical disc have a portion that becomes “escape” before and after the portion. Proposed.
[0015]
According to the invention of Patent Document 3, it is possible to surely suppress surface deflection of a flexible optical disc, enable high-density recording, and prevent occurrence of problems such as sliding contact with an objective lens. On the other hand, this realization requires complicated position adjustment control of the stabilizing guide member and the recording / reproducing head, which not only increases the load on the drive control system, but also significantly increases the device cost. Become.
[0016]
Therefore, as one means for solving such a problem, the present inventor disclosed in Japanese Patent Application No. 2003-19087 a main stabilizing member disposed in the vicinity of recording / reproducing means for performing recording and / or reproduction. In addition, by disposing at a specific position independent of the main stabilizing member, an acting force that opposes the main stabilizing member is generated on the surface of the recording disk on which the main stabilizing member is located, A method was proposed to obtain the effect of stabilizing the disk surface by aerodynamic force without greatly pushing the main stabilizer.
[0017]
According to the invention of Japanese Patent Application No. 2003-19087, compared to the case where only one main stabilizing member is used, a sufficient surface blur reducing effect can be obtained at a position where the pushing amount of the main stabilizing member is shallow. In addition, since the flow line in the disk radial direction in the main stabilizing member and the recording / reproducing means can be limited to a range close to the disk reference plane, the operation mechanism can be simplified.
[0018]
However, in order to generate an acting force that opposes the main stabilizing member on the recording disk surface on which the main stabilizing member is located by the auxiliary stabilizing member, it is necessary to increase the acting force of the auxiliary stabilizing member on the disk. This increase in the acting force has caused the sliding contact between the recording disk and the auxiliary stabilizing member.
[0019]
As one of the methods for securing the acting force, a method of increasing the pushing amount of the auxiliary stabilizing member with respect to the recording disk is conceivable. However, as the pushing amount is increased, the space between the recording disk and the auxiliary stabilizing member is increased. Since the gap formed on the recording medium becomes small, depending on the conditions, the narrowing of the gap may cause the sliding contact between the recording disk and the auxiliary stabilizing member.
[0020]
The object of the present invention is to solve the above-mentioned problems, and in the configuration of the main stabilizing member and the auxiliary stabilizing member that cause the Bernoulli effect to act, the auxiliary stabilizing member does not slide in contact with the recording disk, and is aerodynamic. It is an object of the present invention to provide a recording / reproducing apparatus and a disk cartridge that can apply an acting force to a recording disk to realize good reduction of disk surface blur at a recording / reproducing position.
[0021]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a flexible recording disk is rotated and the surface fluctuation of the recording disk at least near the recording / reproducing position is suppressed by utilizing the Bernoulli effect. A stabilizing member and recording / reproducing means for performing recording and / or reproduction on a surface opposite to a main working surface of the Bernoulli effect of the recording disk, and the recording / reproducing means is disposed within the surface of the recording disk. The main stabilizing member is divided into two areas by a straight line A that is close to the scanning flow line and passes through the vicinity of the center of the recording disk, and an aerodynamic force is generated in at least one of the areas. A recording / reproducing apparatus provided with an auxiliary stabilizing member so as to generate an acting force opposed to the main stabilizing member on the surface of the recording disk positioned, wherein the auxiliary stabilizing member In a state where the main shape of the working surface for generating the aerodynamic working force in the member is a convex shape toward the recording disk and the recording disk is stabilized, the working surface and the recording disk are The working surface is adjusted so that the gap amount in the recording medium is at least 1 μm. With this configuration, the acting force of the auxiliary stabilizing member on the recording disk can be positive pressure, whereby the auxiliary stabilizing member The force in the direction of securing the gap amount of the recording disk can be obtained, and the aerodynamic force of the auxiliary stabilizing member against the recording disk can be obtained without sliding the auxiliary stabilizing member in contact with the recording disk. The acting force that opposes the main stabilization member on the surface of the recording disk on which the main stabilization member is located can be reliably operated. Can be generated. Thereby, the sliding contact between the auxiliary stabilizing member and the recording disk can be prevented in advance, and the reliability and durability of the recording disk can be ensured.
[0022]
Here, the gap amount is a gap between the recording disk and the auxiliary stabilizing member when the recording disk is closest to the auxiliary stabilizing member. Hereinafter, the gap amount means the gap. Used in.
[0023]
According to a second aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the gap amount is adjusted by the cross-sectional area of the working surface of the auxiliary stabilizing member, and this structure increases the cross-sectional area. Thus, the gap amount can be increased and the gap amount can be reduced by reducing the cross-sectional area.
[0024]
According to a third aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the gap amount is adjusted according to the shape of the working surface of the auxiliary stabilizing member. The gap amount can be reduced by making the shape sharp with respect to the surface, and the gap amount can be increased by making the working surface shape gentle.
[0025]
According to a fourth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the gap amount is adjusted by the sectional area of the working surface of the auxiliary stabilizing member and the shape of the working surface. The effects obtained by fusing the inventions according to claims 2 and 3 can be obtained.
[0026]
According to a fifth aspect of the present invention, in the recording / reproducing apparatus according to the third or fourth aspect, the main shape of the working surface of the auxiliary stabilizing member is a spherical surface, and the shape of the working surface is adjusted using the radius of curvature as a parameter. With this configuration, the gap amount can be increased by increasing the radius of curvature, and the gap amount can be decreased by decreasing the radius of curvature.
[0027]
According to a sixth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the gap amount is adjusted by the position of the auxiliary stabilizing member in the disk rotational axis direction with respect to the recording disk surface. The gap amount can be reduced by shifting the arrangement position in the direction of pushing into the recording disk surface, and the gap amount can be increased by shifting in the reverse direction.
[0028]
According to a seventh aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, when the specification range of the disk used in the recording / reproducing apparatus and the condition range of the number of revolutions of the disk are limited, And adjusting the gap amount according to any one of claims 2 to 6, based on a condition in which the disc rigidity is the highest and the disc rotation speed is the slowest. The gap amount can be 1 μm or more in the entire range of the rotation speed.
[0029]
According to the eighth aspect of the present invention, main stabilization that suppresses at least the recording / reproducing position of the recording disk near the recording / reproducing position by utilizing the Bernoulli effect when the recording disk having flexibility stored therein is rotated. The member and the in-plane of the recording disk are divided into two regions by a straight line A that is close to the flow line scanned by the recording / reproducing means and passes near the center of the recording disk, and at least one of the regions, A disc cartridge configured to generate an aerodynamic force and an auxiliary stabilizing member that generates an acting force opposite to the main stabilizing member on the surface of the recording disk on which the main stabilizing member is located. And the main shape of the working surface for generating the aerodynamic acting force in the auxiliary stabilizing member is a convex shape toward the recording disk, and the recording disk In the stabilized state, the working surface is adjusted so that the gap amount at the closest point between the working surface and the recording disk is at least 1 μm, and the auxiliary stabilizing member is fixed and arranged on the inner wall of the disc cartridge. With this configuration, it is not necessary to install an auxiliary stabilizing member on the recording / reproducing apparatus side, and the recording / reproducing apparatus can be simplified. Furthermore, it becomes possible to design an individual disk cartridge provided with an appropriate auxiliary stabilizing member for each disk specification.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0031]
1 is a plan view of an essential part for explaining Embodiment 1 of the recording / reproducing apparatus of the present invention, FIG. 2 (a) is a cross-sectional view taken along the line EE ′ in FIG. 1, and FIG. 2 (b) is FIG. FIG. 3 is a front view of the recording / reproducing apparatus in FIG. 1, 1 is an optical disc that is a flexible recording disc, and 2 is a rotation center (center) portion of the optical disc 1. A hub 3 as a holding member for holding the mounted optical disk 1 for rotation and a spindle motor 4 for rotating the optical disk 1 by fitting a chucking portion as the other holding member into the hub 2. Recording / reproducing means for moving in the radial direction of the optical disc 1 to collect a light beam on the optical disc 1 and optically scanning the optical disc 1 in the direction of flow R in order to perform information recording / reproduction processing This is an optical pickup.
[0032]
Further, reference numeral 5 indicates that the optical disc 1 side (aerodynamic working surface) protrudes in an arc shape when viewed from the front, and the optical pickup scanning movement in the disc radial direction is synchronized with the movement of the optical pickup 4 as shown in FIG. A main stabilizing member that moves in the direction of the line R, and the main stabilizing member 5 uses aerodynamic action force according to Bernoulli's law to at least a surface near the recording / reproducing position by the optical pickup 4 in the optical disc 1. It suppresses blurring.
[0033]
Further, reference numeral 6 denotes an auxiliary stabilizing member that acts together with the main stabilizing member 5 to apply an aerodynamic acting force to the optical disc 1. The main stabilizing member 5 and the auxiliary stabilizing member 6 are optical discs. 1 is disposed on the side of the disk substrate opposite to the recording surface. The auxiliary stabilizing member 6 has a shape in which the optical disc 1 side (aerodynamic acting surface) protrudes in an arc shape when viewed from the front, and is convex toward the disc surface.
[0034]
Further, in the first embodiment, a straight line that is close to the flow line R that moves so that the optical pickup 4 scans in the plane of the optical disk 1 and passes through the vicinity of the center of the optical disk 1 (shown on the flow line R in the figure). Of the two regions S1 and S2 divided by A (including those in the vicinity of the flow line R), the region S2 located downstream of the optical pickup 4 in the optical disc rotation direction is independent of the main stabilizing member 5. Thus, at least one auxiliary stabilizing member 6 (only one is shown in the first embodiment) is provided.
[0035]
The main stabilizing member 5 is provided with a movement control mechanism 11 in the disk radial direction and a position control mechanism 12 in the disk rotation axis direction, and each auxiliary stabilization member 6 has a position control mechanism in the disk rotation axis direction. 13 and a tilt control mechanism 14 which is a tilt adjustment means in the disk radial direction and the disk circumferential direction. The movement control mechanism 11, the position control mechanisms 12 and 13, and the tilt control mechanism 14 are each set of various setting data, etc. Is controlled by a drive unit 16 that receives control data from a memory 15 that stores.
[0036]
The rotation center in the tilt angle control of the tilt control mechanism 14 of the auxiliary stabilizing member 6 is the position of the action surface center (action point) 21 of the auxiliary stabilizing member 6. 1 to 3, reference numeral 22 denotes a proximity region between the auxiliary stabilization member 6 and the optical disc 1, and 23 denotes a proximity point between the auxiliary stabilization member 6 and the optical disc 1.
[0037]
4 is a plan view of an essential part for explaining Embodiment 2 of the recording / reproducing apparatus of the present invention, FIG. 5 (a) is a sectional view taken along line EE ′ in FIG. 4, and FIG. 5 (b) is FIG. FIG. In the following description, members corresponding to those already described are denoted by the same reference numerals, and detailed description thereof is omitted.
[0038]
The difference between the second embodiment and the first embodiment is that the auxiliary stabilizing member 6 is separated from the main stabilizing member 5 in each of the two regions S1 and S2 divided in the same manner as described in the first embodiment. Are arranged in symmetrical positions at least one (one in each region in the second embodiment).
[0039]
FIG. 6 is a plan view of an essential part for explaining Embodiment 3 of the recording / reproducing apparatus of the present invention, FIG. 7A is a cross-sectional view taken along the line EE ′ in FIG. 6, and FIG. FIG. 7 (a), (b) is a cross-sectional view taken along line FF ′ in FIG. 5 and shows that the third embodiment is different from the second embodiment in comparison with FIGS. 5 (a), 5 (b). The adjustment direction of the disc circumferential direction inclination of the auxiliary stabilizing member 6 as shown in FIG.
[0040]
The operation of each embodiment will be described.
[0041]
In order to suppress disc surface blurring by generating aerodynamic force according to Bernoulli's law between a stabilizing member which is a basic configuration in each of the embodiments and a flexible disc, The balance condition between the disk and the disk is important. In particular, the reaction force toward the stabilizing member of the disk is an important parameter. Since this reaction force is determined by the rigidity of the disk and the levitation force generated by the disk rotating and flattening, in principle, the balance condition is the radial position of the stabilizing member, the disk rotation speed, In addition, the disk specification depends on the parameters, and a complicated adjustment drive mechanism is required.
[0042]
As a result of various experiments and considerations regarding this point, when an aerodynamic force is applied to the disk surface by an arbitrary stabilizing member, approximately ± 90 upstream and downstream of the disk rotating direction in the stabilizing member. This shows a phenomenon that the disk surface near the angle approaches the disk reference surface when the disk is considered as an ideal plane.
[0043]
Therefore, the phenomenon that the disk surface at a position shifted by ± 90 degrees from any stabilizing member approaches the disk reference surface is used as the reaction force described above to adjust the balance condition between the stabilizing member and the disk. As a result of the target, the effect of stabilizing the disk surface efficiently as the target was obtained.
[0044]
However, in order to bring the disc surface at a position shifted by ± 90 degrees (in the present invention, the installation position of the main stabilization member) closer to the disc reference plane by an arbitrary stabilizing member, the stabilizing member (in the present invention, It is necessary to increase the acting force of the auxiliary stabilizing member) on the disc. To increase the acting force, the disc and the stabilizing member are brought close to each other (to reduce the gap amount). The member caused contact sliding. In this regard, various experiments were conducted and considerations were made. By adjusting the shape factor of the working surface of the stabilizing member so that the gap amount at the closest point of the disk and the stabilizing member was 1 μm or more. It has been found that it is possible to effectively prevent contact sliding while increasing the acting force of the stabilizing member on the disk.
[0045]
Therefore, in each embodiment, by adjusting the shape factor of the working surface of the auxiliary stabilizing member (member corresponding to the stabilizing member described above) 6, 1 μm or more is provided between the auxiliary stabilizing member 6 and the optical disc 1. Is ensured, and the acting force of the auxiliary stabilizing member 6 with respect to the optical disc 1 is increased to secure the opposing force of the optical disc 1 with respect to the main stabilizing member 5, and good disc surface blurring at the recording / reproducing position is achieved. This is characterized by the reduction of
[0046]
In the first embodiment, the auxiliary stabilizing member 6 is enlarged by increasing the cross-sectional area of the working surface, increasing the radius of curvature of the working surface, or increasing both the cross-sectional area and the radius of curvature. By setting the gap amount between the optical disc 1 and the optical disc 1 to be 1 μm or more, the auxiliary stabilizing member 6 prevents the disc from contacting and sliding between the auxiliary stabilizing member 6 and the optical disc 1. A large aerodynamic force was applied to the surface, and the function of giving the opposing force approaching the main stabilizing member 5 to the disk surface could be sufficiently exhibited. Thereby, a sufficient surface blurring reduction effect was obtained at the installation position of the main stabilization member 5.
[0047]
Further, the flow line R in the disk radial direction of the main stabilizing member 5 and the optical pickup 4 is positioned within a range (a relatively wide area illustrated by oblique lines) H close to the disk reference surface in which surface deflection is suppressed. Therefore, the adjustment mechanism for this purpose can be given a margin, and the adjustment mechanism can be simplified.
[0048]
The configuration of the first embodiment is such that when the apparatus is composed of only the main stabilizing member 5, the disc surface on the downstream side of the main stabilizing member 5 is displaced toward the side close to the main stabilizing member 5. For example, the optical disc 1 in which the static warp shape of the optical disc 1 is convex toward the optical pickup 4 corresponds to this. In this case, the tilt angle of the auxiliary stabilizing member is adjusted in the direction in which the outer peripheral side is brought closer to the optical pickup with respect to the radial direction of the disc, and in the clockwise direction toward the disc center with respect to the disc circumferential direction (auxiliary stabilizing member). The direction in which the upstream side of the disk rotates closer to the disk was appropriate.
[0049]
Further, for example, when the apparatus is configured only by the main stabilization member 5, the optical disc 1 (the optical disc 1 of the optical disc 1) in which the upstream disc surface of the main stabilization member 5 is displaced toward the side close to the main stabilization member 5. In the optical disk 1 in which the static warp shape is concave on the optical pickup 4 side), the configuration in which the disk rotation direction is reversed by modifying the first embodiment can be applied. By appropriately applying the aerodynamic force of the auxiliary stabilizing member 6 to the optical disc 1, it is possible to efficiently generate a force in which the optical disc 1 faces the main stabilizing member 5, and the main stabilizing member. A sufficient surface blur reduction effect was obtained at the moving position of 5. At this time, the tilt angle of the auxiliary stabilizing member 6 is adjusted in a direction in which the outer peripheral side is brought closer to the optical pickup 4 with respect to the radial direction of the disc and in a clockwise direction toward the disc center with respect to the disc circumferential direction ( The direction in which the disk rotation downstream side of the auxiliary stabilizing member approaches the disk was appropriate.
[0050]
Also in the configuration of the second embodiment, the cross-sectional area of the working surface of the auxiliary stabilizing member 6 is increased, the radius of curvature of the working surface is increased, or both the cross-sectional area and the radius of curvature are increased. By setting the gap amount between the stabilizing member 6 and the optical disc 1 to be 1 μm or more, the auxiliary stabilizing member is brought into contact with and does not slide between the auxiliary stabilizing member 6 and the optical disc 1. 6 was able to sufficiently exert the function of applying a large aerodynamic force to the disk surface and giving the disk surface an opposing force approaching the main stabilizing member 5. As a result, as in the first embodiment, a sufficient surface blur reduction effect was obtained at the installation position of the main stabilization member 5.
[0051]
The configuration of the second embodiment is an optical disc in which the disk surface on the downstream side of the main stabilization member 5 is displaced toward the side close to the main stabilization member 5 when the apparatus is configured by only the main stabilization member 5. For example, the optical disc 1 in which the static warp shape of the optical disc 1 is convex toward the optical pickup 4 corresponds to this. At this time, the tilt angles of the auxiliary stabilizing members 6 are adjusted in such a direction that the outer peripheral side is brought closer to the optical pickup 4 with respect to the radial direction of the disc, and a clockwise direction toward the disc center with respect to the disc circumferential direction. (The direction in which the disk rotation upstream side of the auxiliary stabilizing member 6 approaches the optical disk 1) was appropriate.
[0052]
Even in the configuration of the third embodiment, it is possible to increase the cross-sectional area of the working surface of the auxiliary stabilizing member 6, increase the radius of curvature of the working surface, or increase both the cross-sectional area and the radius of curvature. By setting the gap amount between the stabilizing member 6 and the optical disc 1 to be 1 μm or more, the auxiliary stabilizing member is brought into contact with and does not slide between the auxiliary stabilizing member 6 and the optical disc 1. 6 was able to sufficiently exert the function of applying a large aerodynamic force to the disk surface and giving the disk surface an opposing force approaching the main stabilizing member 5. As a result, as in the first embodiment, a sufficient surface blur reduction effect was obtained at the installation position of the main stabilization member 5.
[0053]
The configuration of the third embodiment is an optical disk in which the upstream disk surface of the main stabilization member 5 is displaced to the side close to the main stabilization member 5 when the apparatus is configured by only the main stabilization member 5. For example, the optical disc 1 in which the static warp shape of the optical disc 1 is concave on the optical pickup 4 side corresponds to this. In this case, the tilt angles of the auxiliary stabilizing members 6 are adjusted in a direction in which the outer peripheral side is brought closer to the optical pickup with respect to the disc radial direction and in a counterclockwise direction toward the disc center with respect to the disc circumferential direction ( The direction in which the disk rotation downstream side of the auxiliary stabilizing member 6 approaches the disk was appropriate.
[0054]
In the configurations of the first to third embodiments, a position control mechanism in the direction of the disk rotation axis or a tilt control system is added to the main stabilizing member 5 to perform fine adjustment with higher accuracy, so that the recording / reproducing position can be adjusted. It was also possible to optimize the surface blur.
[0055]
FIG. 8 is a plan view of an essential part for explaining a modification of Embodiment 3 of the recording / reproducing apparatus of the present invention, FIG. 9A is a cross-sectional view taken along the line EE ′ in FIG. 8, and FIG. FIG. 8 is a cross-sectional view taken along the line FF ′ in FIG. 8. In the third embodiment, the hub 2 of the optical disc 1 is connected to the chuck of the spindle motor 3 shown in FIG. 3 as in the modified examples shown in FIGS. A peripheral portion (circular region in FIG. 8) connecting the fulcrum positions (the outer periphery of the hub 2 in FIG. 8) where the optical disc 1 starts to bend when the stabilizing members 5 and 6 are pushed and bent on the king portion. ) And a straight line A passing through two points intersecting and perpendicular to the straight line A, that is, on a disc surface sandwiched between a straight line B1 closer to the main stabilizing member 5 and a straight line B2 farther from the main stabilizing member 5. In the region C, the auxiliary stabilizing member 6 is located near the straight line B1 on the side close to the main stabilizing member 5. With the structure disposing the use point 21, to further reduce the disk surface vibration at the movement position of the main stabilizing member 5, was obtained exerts sufficient effect described above.
[0056]
In each of the above embodiments, the auxiliary stabilizing member 6 is provided in the housing 30 of the apparatus main body as illustrated in FIG. 10, so that a disk cartridge for storing the optical disk is not used or the optical disk is removed from the disk cartridge. The present invention can be implemented in a recording / reproducing apparatus that is taken out and driven.
[0057]
Further, as shown in FIG. 11, the auxiliary stabilizing member 6 in each of the above embodiments can be provided on the inner wall of the disc cartridge 31. With this configuration, the configuration on the recording / reproducing apparatus side is configured. It can be simplified. Further, in this configuration, since the auxiliary stabilizing member 6 can be individually set in the disk cartridge 31, the auxiliary stabilizing member 6 can be individually designed for each of various disk specifications, and stabilization due to variations in disk specifications. It is also possible to correct the deviation of conditions.
[0058]
Examples of the disk cartridge 31 include those shown in FIGS. 12 and 13, reference numeral 32 denotes a first through hole for allowing the main stabilizing member 5 to be inserted, and movement in the radial direction of the disk. Reference numeral 33 denotes an optical pickup 4 and a part of the spindle motor 3 are inserted. And a second through-hole for enabling the optical pickup 4 to move in the radial direction of the disk. A shutter for opening and closing the through holes 32 and 33, a mechanism for fixing the optical disc 1 in the cartridge, and other mechanisms necessary for installing the cartridge in the spindle motor 3 are illustrated. Not.
[0059]
In the above embodiment, the configuration example in which the auxiliary stabilizing member is disposed on the same side as the main stabilizing member has been described. However, the auxiliary stabilizing member may be disposed on the opposite side of the main stabilizing member and the disk. The disc surface shake reduction effect can be obtained. For example, the structure shown in FIG. 14 can be illustrated.
[0060]
FIG. 14 shows a case where the disk cartridge 35 in which the optical disk 1 is stored is disposed in the housing 30 on the recording / reproducing apparatus side, and the auxiliary stabilizing member 6 is installed on the same side as the optical pickup 4. In this configuration, since the contact sliding between the auxiliary stabilizing member 6 and the optical disc 1 directly leads to the occurrence of a recording / reproducing error, the avoidance of this contact sliding is the most important issue. Therefore, by adopting the configuration of the above-described embodiment, it is possible to surely avoid the sliding contact between the auxiliary stabilizing member 6 and the optical disc 1 and to prevent the occurrence of recording / reproducing errors related thereto.
[0061]
In the description of the above-described embodiment, the case where the cross-sectional shapes of the action surfaces of the main stabilizing member 5 and the auxiliary stabilizing member 6 are circular has been described, but various other shapes can be considered. As long as it is a shape that generates an aerodynamic force on the optical disc 1 as both the stabilizing members 5 and 6, it can be adopted without any problem and is not particularly limited. In addition, regarding the shape of the working surface, basically, the spherical shape has been described as a representative, but there are various shapes such as an aspheric shape and a special uneven shape considering the pressure distribution of aerodynamic force. It is conceivable and is not limited to the shapes already described.
[0062]
Next, the present invention will be described more specifically based on examples.
[0063]
(Example 1)
In the first embodiment, the configuration shown in FIGS. 1 and 2 is adopted, and the auxiliary stabilizing member 6 has a columnar shape with a diameter of 40 mm and a surface facing the optical disk (diameter 120 mm) 1 having a curvature radius of 200 mm. The main stabilizing member 5 has a cylindrical shape with a diameter of 10 mm and a surface facing the optical disk 1 with a radius of curvature of 100 mm. The auxiliary stabilizing member 6 is disposed at a 90 degree position downstream of the main stabilizing member 5 in the disk rotation direction, and the center of the disk facing surface is positioned at a radius of 45 mm of the optical disk 1. In the member 6, the adjustment described above is performed so that the gap amount between the auxiliary stabilizing member 6 and the optical disc 1 is approximately 1 μm when the optical disc 1 is in a stable state.
[0064]
Although not shown, the main stabilization member 5 is provided with a moving mechanism in the disk radial direction and a position control mechanism in the disk rotation axis direction, and the auxiliary stabilization member 6 is provided with a position control mechanism in the disk rotation axis direction. And a tilt control mechanism in the disc radial direction and the disc circumferential direction. The rotation center in the tilt angle control of the tilt control mechanism of the auxiliary stabilizing member 6 is the center position of the working surface of the auxiliary stabilizing member.
[0065]
In Example 1, a case where a polycarbonate sheet having a thickness of 120 mm and a thickness of 75 μm is used as a disk substrate will be described. In preparing the disk, first, a groove having a stamper pitch of 0.6 μm and a width of 0.3 μm is transferred to the sheet by thermal transfer, and then the sheet / Ag reflective layer 120 nm / (ZrO ₂ —Y ₂ O by sputtering. ₃₎ it was formed in the order of _{-SiO 2 7nm / AgInSbTeGe 10nm / ZnS} -SiO 2 25nm / Si 3 N 4 10nm. The information recording area was set in a range from an inner diameter of 40 mm to an outer diameter of 118 mm (radius 20 mm to 58 mm). Thereafter, a UV resin was spin-coated and cured by ultraviolet irradiation to form a transparent protective film having a thickness of 5 μm. Further, a hard coat having a thickness of 10 μm was applied to the opposite surface. A hub 2 having an outer diameter of 30 mm, an inner diameter of 15 mm, and a thickness of 0.3 mm was attached to the center of the disk. The finished state of the disk was slightly warped to the hard coat side.
[0066]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, the auxiliary stabilizing member and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface shake, and a laser displacement meter is arranged at the position of the optical pickup 4. The disc surface blur was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Here, the auxiliary stabilizing member is tilted by 1 degree in the direction in which the outer peripheral portion is brought close to the optical pickup with respect to the disk radial direction, and 0.7 degrees in the clockwise direction toward the disk center with respect to the disk circumferential direction, Further, it was arranged at a position where the disk reference surface was pushed in by 0.5 mm. The disk reference surface here is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and the auxiliary stabilizing member 6 that determines the pushing amount. The reference position was the center position for tilt angle control.
[0067]
(Example 2)
In the second embodiment, based on the configuration of the first embodiment, the auxiliary stabilizing member 6 is positioned 90 degrees upstream of the main stabilizing member 5 in the disk rotation direction, and the center of the disk facing surface is the radius of the disk. The arrangement was changed to be 45 mm. The auxiliary stabilizing member 6 is adjusted as described above so that the gap amount between the auxiliary stabilizing member 6 and the optical disc 1 is about 1 μm when the optical disc 1 is in a stable state. Yes.
[0068]
Further, the optical disk 1 has a configuration in which the hard coat is omitted from the specification of the first embodiment. As a result, the finished state of the optical disc 1 was slightly warped toward the transparent protective film side.
[0069]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, the auxiliary stabilizing member and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface vibration, and a laser displacement meter is arranged at the position of the optical pickup 4. The disc surface blur was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Here, the auxiliary stabilizing member is tilted 2 degrees in the direction in which the outer peripheral portion is brought closer to the optical pickup with respect to the disk radial direction, and 1 degree in the counterclockwise direction toward the disk center with respect to the disk circumferential direction. The disc was placed at a position where it was pushed in by 1 mm from the reference plane. The disk reference surface here is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and the auxiliary stabilizing member 6 that determines the pushing amount. The reference position was the center position for tilt angle control.
[0070]
(Example 3)
In Example 3, the configuration shown in FIGS. 4 and 5 is adopted, and both auxiliary stabilizing members 6 have a columnar shape with a diameter of 40 mm and a surface facing the optical disk (diameter 120 mm) 1 having a curvature radius of 200 mm. The main stabilizing member 5 has a cylindrical shape with a diameter of 10 mm and a surface facing the optical disc 1 with a radius of curvature of 100 mm. Both auxiliary stabilizing members 6 are arranged so that the center of the disk facing surface is at a position of a radius of 45 mm of the optical disk 1 at both positions of 90 degrees upstream and downstream in the disk rotation direction of the main stabilizing member 5. The auxiliary stabilizing member 6 is adjusted as described above so that the gap amount between the auxiliary stabilizing member 6 and the optical disc 1 is about 1 μm when the optical disc 1 is in a stable state. Yes.
[0071]
Although not shown, the main stabilizing member 5 is provided with a moving mechanism in the disk radial direction and a position control mechanism in the disk rotating shaft direction, and both auxiliary stabilizing members 6 have position control in the disk rotating shaft direction. And a tilt control mechanism in the disk radial direction and the disk circumferential direction. The rotation center in the tilt angle control of the tilt control mechanism of the auxiliary stabilizing member 6 is the center position of the working surface of the auxiliary stabilizing member.
[0072]
The same optical disk 1 as in Example 1 was used.
[0073]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, both auxiliary stabilizing members and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface shake, and a laser displacement meter is arranged at the position of the optical pickup 4 Then, the disc surface shake was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Here, both auxiliary stabilizing members are 0.7 degrees in the direction in which the outer peripheral portion is brought closer to the optical pickup with respect to the disk radial direction, and 0.4 in the clockwise direction toward the disk center with respect to the disk circumferential direction. It was arranged at a position where it was tilted by 0.3 mm and the disk reference surface was pushed 0.3 mm. Here, the disk reference surface is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and both auxiliary stabilizing members that determine the pushing amount. The reference position 6 was the center position for tilt angle control.
[0074]
(Example 4)
In Example 4, the configuration shown in FIGS. 6 and 7 is adopted, and both auxiliary stabilizing members 6 have a cylindrical shape with a diameter of 40 mm and a surface facing the optical disc (diameter 120 mm) 1 having a curvature radius of 200 mm. The main stabilizing member 5 has a cylindrical shape with a diameter of 10 mm and a surface facing the optical disc 1 with a radius of curvature of 100 mm. Both auxiliary stabilizing members 6 are arranged so that the center of the disk facing surface is at a position of a radius of 45 mm of the optical disk 1 at both positions of 90 degrees upstream and downstream in the disk rotation direction of the main stabilizing member 5. The auxiliary stabilizing member 6 is adjusted as described above so that the gap amount between the auxiliary stabilizing member 6 and the optical disc 1 is about 1 μm when the optical disc 1 is in a stable state. Yes.
[0075]
Although not shown, the main stabilizing member 5 is provided with a moving mechanism in the disk radial direction and a position control mechanism in the disk rotating shaft direction, and both auxiliary stabilizing members 6 have position control in the disk rotating shaft direction. And a tilt control mechanism in the disk radial direction and the disk circumferential direction. The rotation center in the tilt angle control of the tilt control mechanism of the auxiliary stabilizing member 6 is the center position of the working surface of the auxiliary stabilizing member.
[0076]
Further, the optical disk 1 has a configuration in which the hard coat is omitted from the specification of the first embodiment. As a result, the finished state of the optical disc 1 was slightly warped toward the transparent protective film side.
[0077]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, both auxiliary stabilizing members and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface shake, and a laser displacement meter is arranged at the position of the optical pickup 4 Then, the disc surface shake was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Here, both auxiliary stabilizing members are tilted by 1 degree in the direction in which the outer peripheral portion is brought closer to the optical pickup with respect to the disk radial direction, and 0.7 degrees in the counterclockwise direction toward the disk center with respect to the disk circumferential direction. In addition, it was arranged at a position where the disc reference surface was pushed in by 0.5 mm. Here, the disk reference surface is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and both auxiliary stabilizing members that determine the pushing amount. The reference position 6 was the center position for tilt angle control.
[0078]
(Example 5)
In Example 5, the configuration shown in FIGS. 8 and 9 is adopted, and both auxiliary stabilizing members 6 have a columnar shape with a diameter of 40 mm and a surface facing the optical disk (diameter 120 mm) 1 having a curvature radius of 200 mm. The main stabilizing member 5 has a cylindrical shape with a diameter of 10 mm and a surface facing the optical disc 1 with a radius of curvature of 100 mm. Both auxiliary stabilizing members 6 are arranged so that the center of the disk facing surface is at a position of a radius of 45 mm of the optical disk 1 at both positions at 75 degrees upstream and downstream in the disk rotation direction of the main stabilizing member 5. The auxiliary stabilizing member 6 is adjusted as described above so that the gap amount between the auxiliary stabilizing member 6 and the optical disc 1 is about 1 μm when the optical disc 1 is in a stable state. Yes.
[0079]
Although not shown, the main stabilizing member 5 is provided with a moving mechanism in the disk radial direction and a position control mechanism in the disk rotating shaft direction, and both auxiliary stabilizing members 6 have position control in the disk rotating shaft direction. And a tilt control mechanism in the disk radial direction and the disk circumferential direction. The rotation center in the tilt angle control of the tilt control mechanism of the auxiliary stabilizing member 6 is the center position of the working surface of the auxiliary stabilizing member.
[0080]
The same optical disk 1 as in Example 1 was used.
[0081]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, both auxiliary stabilizing members and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface shake, and a laser displacement meter is arranged at the position of the optical pickup 4 Then, the disc surface shake was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Here, both auxiliary stabilizing members are 0.7 degrees in the direction in which the outer peripheral portion is brought closer to the optical pickup with respect to the disk radial direction, and 0.4 in the clockwise direction toward the disk center with respect to the disk circumferential direction. It was arranged at a position where it was tilted by 0.3 mm and the disk reference surface was pushed 0.3 mm. Here, the disk reference surface is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and both auxiliary stabilizing members that determine the pushing amount. The reference position 6 was the center position for tilt angle control.
[0082]
(Comparative example)
In this comparative example, the configuration shown in FIG. 15 to FIG. 17 is adopted, and both auxiliary stabilizing members 6 have a cylindrical shape with a diameter of 15 mm with a curvature radius of 50 mm on the surface facing the optical disc (diameter 120 mm) 1. The main stabilizing member 5 has a cylindrical shape with a diameter of 10 mm and a surface facing the optical disc 1 with a radius of curvature of 100 mm. Both auxiliary stabilizing members 6 are arranged so that the center of the disk facing surface is at a position of a radius of 45 mm of the optical disk 1 at both positions of 90 degrees upstream and downstream in the disk rotation direction of the main stabilizing member 5. Although not shown, the main stabilizing member 5 is provided with a moving mechanism in the disk radial direction and a position control mechanism in the disk rotating shaft direction, and both auxiliary stabilizing members 6 have position control in the disk rotating shaft direction. A mechanism was provided.
[0083]
The same optical disk 1 as in Example 1 was used.
[0084]
The optical disk 1 is rotated at a disk rotational speed of 15 m / sec, both auxiliary stabilizing members and the main stabilizing member are arranged at predetermined positions to stabilize the disk surface shake, and a laser displacement meter is arranged at the position of the optical pickup 4 Then, the disc surface shake was evaluated. Further, contact between the auxiliary stabilizing member and the recording disk was detected by an AE sensor (not shown) arranged on the auxiliary stabilizing member, and the contact sliding state was evaluated. Both auxiliary stabilizing members were arranged at a position where the disk reference surface was pushed in by 0.5 mm. Here, the disk reference surface is a disk surface on the side of the main stabilizing member 5 when the disk is assumed to be ideally flat, and both auxiliary stabilizing members that determine the pushing amount. The reference position of 6 is the center of the working surface of the auxiliary stabilizing member.
[0085]
In each of the examples and comparative examples, the proximity angle 23 between the auxiliary stabilizing member 6 and the optical disc 1, that is, the point of action of the aerodynamic force and the center of the working surface of the auxiliary stabilizing member 6 by the tilt angle setting. 21, that is, the appropriate point at which the aerodynamic force of the auxiliary stabilizing member 6 is applied is adjusted to substantially the same position, and conditions for maximizing the air stabilizing force for each auxiliary stabilizing member are prepared.
[0086]
Under the above conditions, the disc surface shake state at a radius of 55 mm and the presence or absence of sliding between the auxiliary stabilizing member and the optical disc were measured. As a result, as shown in FIG. It was in a state. However, as shown in FIG. 18, in the comparative example, contact sliding occurred between the auxiliary stabilizing member 6 and the optical disc 1, causing a recording / reproducing error. On the other hand, in all of the present embodiments, the aerodynamic force applied to the optical disk 1 by the auxiliary stabilizing member 6 is applied to establish the surface shake stabilization condition at the installation position of the main stabilizing member 5. It was possible to eliminate the contact sliding by making the auxiliary stabilizing member 6 have a working surface shape.
[0087]
As described above, in the present embodiment and this example, in the configuration of the main stabilizing member and the auxiliary stabilizing member that cause the Bernoulli effect, the aerodynamic acting force by the auxiliary stabilizing member is optimized, and recording is performed. It is possible to provide a recording / reproducing apparatus capable of realizing good disk surface fluctuation reduction at the reproducing position.
[0088]
【The invention's effect】
As described above, according to the recording / reproducing apparatus and the disk cartridge of the present invention, in the configuration of the main stabilizing member and the auxiliary stabilizing member that cause the Bernoulli effect, the contact between the auxiliary stabilizing member and the recording disk. In the absence of sliding, the aerodynamic force of the auxiliary stabilizing member against the recording disk is reliably applied, and the acting force that opposes the main stabilizing member is efficiently generated on the surface of the recording disk on which the main stabilizing member is located. It becomes possible to make it.
[Brief description of the drawings]
FIG. 1 is a plan view of an essential part for explaining Embodiment 1 of a recording / reproducing apparatus of the present invention. FIG. 2 (a) is a cross-sectional view taken along line EE ′ in FIG. 1, and FIG. FIG. 3 is a front view of the first embodiment of FIG. 1. FIG. 4 is a plan view of the main part for explaining the second embodiment of the recording / reproducing apparatus of the present invention. 4A is a cross-sectional view taken along line EE ′ in FIG. 4, and FIG. 6B is a cross-sectional view taken along line FF in FIG. 4. FIG. 6 is a diagram illustrating a main part for explaining Embodiment 3 of the recording / reproducing apparatus of the present invention. FIG. 7A is a cross-sectional view taken along line EE ′ in FIG. 6, and FIG. 8B is a cross-sectional view taken along line FF in FIG. 6. FIG. 8 is a diagram of a third embodiment of the recording / reproducing apparatus of the present invention. FIG. 9A is a cross-sectional view taken along line EE ′ in FIG. 8, and FIG. 9B is a cross-sectional view taken along line FF in FIG. 8. FIG. Form recording / playback FIG. 11 is a sectional view for explaining a disk cartridge according to an embodiment of the present invention. FIG. 12 is a plan view of the disk cartridge according to the embodiment. 11 is a cross-sectional view of the disk cartridge of FIG. 11. FIG. 14 is a cross-sectional view for explaining another example of the disk cartridge according to the embodiment of the invention. FIG. 15 is a schematic diagram of a recording / reproducing apparatus as a comparative example of the invention. FIG. 16 is a cross-sectional view taken along line EE ′ in FIG. 15. FIG. 17 is a front view of the recording / reproducing apparatus in FIG. 15.FIG. 18 is a list of characteristic evaluations in the embodiment of the present invention and the comparative example. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Optical disk 2 Hub 3 Spindle motor 4 Optical pick-up 5 Main stabilization member 6 Auxiliary stabilization member 21 Center of action surface (action point) of an auxiliary stabilization member
22 Auxiliary Stabilizing Member and Optical Disc Proximity Area 23 Auxiliary Stabilizing Member and Optical Disc Proximity Point 30 Main Body Housing 31 and 35 Disk Cartridge A Line of Optical Pickup Flow Lines B1 and B2 Vertical straight line R Flow line S1, S2, C Area divided in the plane of the recording disk

Claims (8)

A main stabilizing member that rotates a recording disk having flexibility and uses the Bernoulli effect to suppress surface blurring of the recording disk at least in the vicinity of the recording / reproducing position; and a working surface of the main Bernoulli effect of the recording disk; Comprises recording / reproducing means for recording and / or reproducing on the opposite side,
The surface of the recording disk is divided into two areas by a straight line A that is close to the flow line that the recording / reproducing means scans and passes through the vicinity of the center of the recording disk. A recording / reproducing apparatus in which an auxiliary stabilizing member is disposed so as to generate a large acting force and generate an acting force opposite to the main stabilizing member on the surface of the recording disk on which the main stabilizing member is located. And
In the state where the main shape of the working surface for generating the aerodynamic acting force in the auxiliary stabilizing member is a convex shape toward the recording disk, and the recording disk is stabilized, the working surface, the recording disk, The recording / reproducing apparatus is characterized in that the working surface is adjusted so that the gap amount at the closest point is at least 1 μm. The recording / reproducing apparatus according to claim 1, wherein the gap amount is adjusted by a cross-sectional area of the working surface of the auxiliary stabilizing member. 2. The recording / reproducing apparatus according to claim 1, wherein the gap amount is adjusted according to a shape of a working surface of the auxiliary stabilizing member. 2. The recording / reproducing apparatus according to claim 1, wherein the gap amount is adjusted by a cross-sectional area of a working surface of the auxiliary stabilizing member and a shape of the working surface. 5. The recording / reproducing apparatus according to claim 3, wherein the main shape of the working surface of the auxiliary stabilizing member is a spherical surface, and the shape of the working surface is adjusted using the radius of curvature as a parameter. 2. The recording / reproducing apparatus according to claim 1, wherein the gap amount is adjusted according to an arrangement position of the auxiliary stabilizing member in a disc rotation axis direction with respect to the recording disc surface. When the specification range of the disk used in the recording / reproducing apparatus and the condition range of the disk rotation speed are limited, the disk rigidity is the highest and the disk rotation speed is the lowest in each of the ranges. 7. The recording / reproducing apparatus according to claim 1, wherein the gap amount adjustment according to any one of claims 2 to 6 is performed. A main stabilizing member that suppresses the wobbling of the recording disk at least in the vicinity of the recording / reproducing position by utilizing the Bernoulli effect during rotation of the flexible recording disk housed therein; and an in-plane of the recording disk Is divided into two areas by a straight line A that is close to the flow line scanned by the recording / reproducing means and passes near the center of the recording disk, and generates an aerodynamic force in at least one of the areas. A disk cartridge having a configuration in which an auxiliary stabilizing member that generates an acting force facing the main stabilizing member acts on the recording disk surface on which the main stabilizing member is located,
In the state where the main shape of the working surface for generating the aerodynamic acting force in the auxiliary stabilizing member is a convex shape toward the recording disk, and the recording disk is stabilized, the working surface, the recording disk, A disk cartridge characterized in that the working surface is adjusted so that the gap amount at the closest point is at least 1 μm, and the auxiliary stabilizing member is fixed and disposed on the inner wall of the disk cartridge.

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