JP3911197B2 - Optical disc drive stabilization device and optical disc device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an optical disk drive that stabilizes the vibration in the rotation axis direction by causing a pressure difference in the air flow when rotating an optical disk that is a flexible sheet-like optical information recording medium. The present invention relates to a stabilization device and an optical disc device that is equipped with the optical disc drive stabilization device and optically writes and / or reads data on a recording surface of the optical disc.
[0002]
[Prior art]
In recent years, there has been a demand for optical discs to record large volumes of digital data, such as the start of digitization of television broadcasts. Of the methods for dealing with the higher density of optical discs, the basic method is to reduce the diameter of the light spot for recording / reproduction. For this reason, it is effective to shorten the wavelength of light used for recording / reproduction and to 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 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.
[0003]
As for the objective lens, it was less than NA 0.5 for CD, but it is about NA 0.6 for DVD. In the future, it is required to further increase the numerical aperture (NA) to NA 0.7 or more.
[0004]
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]
Furthermore, since the distance between the objective lens and the recording surface of the optical disk is reduced by using a high NA objective lens, it is necessary to reduce the surface blur of the optical disk before the focus servo at the start is pulled in. 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 shown on page 183 of O PLUS E (vol. 20 No. 2), a recording film is formed on a substrate that is as thick and rigid as CD. However, a system has been proposed in which recording / reproducing light is recorded / reproduced with respect to the recording film through the thin cover layer without passing through the substrate.
[0007]
Further, as described in, for example, Japanese Patent Application Laid-Open Nos. 7-105657 and 10-308059, a flexible optical disk is rotated on a stabilizing plate having a plane, and the air according to Bernoulli's law is used. There is known a method for stabilizing the surface shake in an optical disk by using force.
[0008]
In addition, in the Japanese Patent Application No. 2001-228893, the applicant of the present invention is a Bernoulli-based vibration in the direction of the rotation axis at least at a portion where writing or reading is performed on the optical disc when the flexible sheet-like optical disc is driven to rotate. It was proposed to provide stabilization means to stabilize by the air flow pressure difference based on the law.
[0009]
[Problems to be solved by the invention]
However, in the conventional technique, when the optical disk substrate 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.
[0010]
In addition, the pressure distribution of the air flow between the deformable complex-shaped flexible optical disk and the stabilizing means cannot be obtained by applying the simple Bernoulli's law. There is also a problem that an appropriate shape of the stabilizing means has to be obtained for stabilization.
[0011]
In addition, the repulsive force (pressure) acting on the optical disk by the stabilizing means is mainly determined by the gap size between the two and the disk rotation speed. However, in the radial direction of the optical disk, the disk rotation speed changes linearly and is stable. The conversion conditions will be different. However, even if this stabilization condition is set in detail, it is not possible to cope with abnormal vibrations that sometimes occur, and there is a possibility that the stabilization means and the optical disc come into contact with each other.
[0012]
SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems, to prevent the optical disc having flexibility and the stabilizing means from coming into contact with each other and to cause damage, and to drive the optical disc stably. An apparatus and an optical disk device are provided.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is provided with a rotation driving means for rotating a flexible sheet-like optical disk and a recording disk of the optical disk, and at least a writing on the optical disk. And a stabilizing means for stabilizing the vibration in the direction of the rotation axis at the portion where the reading or reading is performed by causing a pressure difference in the air flow, and a protruding member protruding in the direction of the optical disk is used as the stabilizing means. An optical disk drive stabilization device, wherein a sensing means for sensing a contact pressure between the projecting member and an optical disk, and the projecting member when the sensing means senses a contact pressure exceeding a preset threshold value Is provided with a retracting means for retracting the optical disk from the optical disk surface. Out damaged by contact with member can be prevented from occurring, and the sheet-shaped optical disc having flexibility can be rotated in a stable state.
[0014]
According to a second aspect of the present invention, there is provided the optical disk stabilizing device according to the first aspect, further comprising a moving means for moving the projecting member from the center of the optical disk to the outer circumferential direction. This makes it possible to stabilize any surface of the optical disc.
[0015]
According to a third aspect of the present invention, in the optical disk drive stabilizing device according to the first or second aspect, a plurality of protruding members are provided. With this configuration, since there are a plurality of stabilization regions with less surface blur, the stabilization state can be improved, and the degree of freedom in design is increased.
[0016]
According to a fourth aspect of the present invention, there is provided the optical disk stabilizing device according to any one of the first to third aspects, wherein the rotational speed detecting means for detecting the rotational speed of the optical disk and the rotational speed of the optical disk constituting the stabilized state are provided. Comprising a storage means for storing the related information of the distance between the optical disk corresponding to the stabilizing member, and a distance changing means for changing the relative distance between the protruding member and the optical disk. It becomes possible to keep the distance between the optical disk and the stabilizing member on the entire surface of the optical disk at an appropriate distance for stabilizing the optical disk.
[0017]
According to a fifth aspect of the present invention, in the optical disk stabilizing device according to any one of the first to fourth aspects, a hollow portion is formed in a direction toward the optical disk in the protruding member. If it exists, the area | region of the protrusion member in which a negative pressure will be open | released by air | atmosphere will increase the repulsive force between an optical disk and a protrusion member, and an optical disk will become more stable.
[0018]
According to a sixth aspect of the present invention, there is provided a rotation driving means for rotating a flexible sheet-like optical disc, an optical pickup for optically writing and / or reading on a recording surface of the optical disc, and an optical disc Stabilizing means installed on the side opposite to the recording surface and stabilizing at least the vibration in the direction of the rotation axis in a portion where writing or reading is performed on the optical disc by causing a pressure difference in the air flow, 5. An optical disc drive comprising optical disc drive stabilization means comprising a protruding member protruding in the direction of the optical disc as the stabilization means, wherein the optical disc drive stabilization device according to any one of claims 1 to 4 as the optical disc drive stabilization device. This device is equipped with an optical device, and with this configuration, the optical disk and the protruding member are brought into contact with each other due to abnormal vibration. Since it is possible to rotate the sheet-shaped optical disk having flexibility, such as preventing damage, in a stable state, writing and / or reading on the recording surface of the optical disk is performed stably. It will be.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0020]
FIG. 1 is an explanatory diagram showing a basic configuration for explaining an embodiment of an optical disk drive stabilization device according to the present invention. 1 is a flexible optical disk sheet, 2 is a surface shake of the optical disk sheet 1, A projecting member as a stabilizing means for stabilizing by air pressure generated based on Bernoulli's law, which will be described later, 3 is an optical disk rotational speed detecting device for detecting the rotational speed of the optical disk sheet 1, and 4 is a condition for stabilizing the optical disk sheet 1. Stabilization state storage device 5 which is a storage means for storing data, 5 is a stabilization state calculation device for receiving the data from stabilization state storage device 4 and calculating and setting the stabilization state, 6 is set This is a protruding member height adjusting device as a distance changing means for adjusting the height position of the protruding member 2 in the disk rotation axis Y direction based on the stabilized state.
[0021]
As shown in FIG. 1, when the projecting member 2 is brought close to the flexible optical disc sheet 1, positive pressure and negative pressure are generated in the proximity region, and the optical disc sheet 1 is distorted. The whole is stabilized by the balance between the static pressure generated by the fluid air and the force with which the deformation of the optical disc sheet 1 is returned. However, when the disk rotational speed changes, the pressure distribution generated at the lower end of the protruding member 2 changes, and the stabilized state may be lost. The stabilization condition is determined by the shape of the protruding member 2, the physical properties of the optical disk sheet 1, the disk rotation speed, or the like.
[0022]
Therefore, the stabilization conditions of these parameters are determined in advance by performing experiments or numerical simulations, and are stored in the stabilization state storage device 4. Necessary and sufficient parameters that define the stabilization state include, for example, material property values (Young's modulus, Poisson's ratio, density) of the optical disc sheet 1, a gap from the foremost position of the protruding member 2 to the disc surface, and the optical disc sheet 1 is stable. It is the rotation speed which becomes. Note that the surface of the optical disk sheet 1 is complicatedly three-dimensionally distorted by centrifugal force due to the rotation of the optical disk sheet 1, gravity, and air pressure received from the protruding member 2.
[0023]
FIG. 2 is an explanatory view showing a part of the side surface of the apparatus of FIG. The shortest distance of the gap between the protruding member 2 and the disk surface does not necessarily pass through the leading edge position of the guide. However, the gap length can also be defined as the distance between the straight line passing through the most advanced position a of the protruding member 2 and the intersection b of the surface of the optical disk sheet 1 in parallel with the rotation axis 7 of the spindle motor that rotates the optical disk sheet 1. Since the stabilization state can be uniquely determined, the stabilization state is defined with the value for convenience (this convenient value is referred to as the closest distance X). With the closest distance X, it is easy to measure the distance with a laser interferometer defined parallel to the direction of the rotation axis 15, for example.
[0024]
Further, the protruding member height adjusting device 6 controls the distance from the position of the protruding member 2 from a specified surface (hereinafter referred to as a specified height distance) in order to install the protruding member 2 at an appropriate closest distance X. To do. The certain prescribed surface is arbitrary, and is used, for example, with the surface of the optical disc sheet 1 in a non-rotated state as a reference. However, it is necessary to create a table that can uniquely convert the closest distance X measured using the laser interferometer or the like and the specified height distance in advance. In practice, it is desirable to control stabilization with this defined height distance.
[0025]
The stabilization state storage device 4 is composed of, for example, a semiconductor storage device provided in an optical disk device on which the present optical disk drive stabilization device is mounted. The rotational speed of the optical disk sheet 1 varies depending on the operating state, but the rotational speed is detected by the optical disk rotational speed detector 3 and the information is sent to the stabilization state calculator 5. Based on the information from the stabilization state storage device 4, the stabilization state calculation device 5 calculates and determines the optimum gap length of the projecting member 2, that is, the specified height distance, and the projecting member height adjusting device 6 projects it. The member 2 is adjusted to an appropriate height. Thereby, even when the rotational speed of the optical disk sheet 1 is changed, it is possible to dynamically shift to an appropriate stabilization state.
[0026]
FIG. 3 is a diagram illustrating an example of data that defines a stabilization state when the lower end shape of the protruding member 2 is a plane. If the shape of the protruding member 2 and the physical properties of the optical disk sheet 1 are constant, the stabilized state is mainly expressed as a function of the rotational speed and the specified height distance (nearest distance). However, since this function has strong non-linearity, it cannot be represented by a straight line, and there is a problem that a stable point does not appear below a certain rotation speed. Therefore, it is necessary to store data in the device operating range in the stabilization state storage device 4, and at least two data items are required as a data table in the range.
[0027]
FIG. 4 is an example of a data table stored in the stabilization state storage device 4. Naturally, the physical property value of the optical disk sheet 1 and the shape of the protruding member 2 need to be constant. Further, data not in this data table is derived by interpolation from data in the vicinity of the table.
[0028]
FIG. 5 is an explanatory diagram for explaining a configuration provided with a protruding member radial movement device 7 which is a moving means for controlling the position of the protruding member 2 in the radial direction of the optical disk in the present embodiment. The stabilization state depends on the rotation speed of the optical disk sheet 1, but the rotation speed differs between the vicinity of the center of the disk radius and the vicinity of the outer periphery. Therefore, the gap between the optical disk sheet 1 and the protruding member 2 is a necessary condition for stabilization. The length will be different. Therefore, the stabilization conditions of these parameters are determined in advance through experiments or numerical simulations and stored in the stabilization state storage device 4. When the projecting member 2 is moved in the radial direction by the projecting member radial movement device 7, an optimum stabilization state is calculated by the stabilization state computing device 5 based on information from the stabilization state storage device 4. Determine. Thereby, even when the position of the protruding member 2 changes in the radial direction of the optical disc sheet 1, it is possible to shift to an appropriate stabilization state.
[0029]
As illustrated in FIGS. 6A to 6C, as a data table stored in the stabilization state storage device 4, a data item related to the radial position of the protruding member 2 is added to the data table illustrated in FIG. 4. It will be.
[0030]
FIG. 7 is an explanatory diagram for explaining a configuration in which the pressure sensor 8 as a sensing means is provided on the surface of the protruding member 2 facing the optical disc sheet 1 in the present embodiment. A linear pressure sensor 8 is provided. When the pressure sensitive sensor 8 comes into contact with the optical disc sheet 1 due to vibration or the like, the maximum pressure data detected from the pressure sensitive sensor 8 is sent to the pressure judging device 9, and the pressure judging device 9 If the pressure is equal to or higher than the threshold value set in advance, the protruding member 2 is retracted from the optical disc sheet 1 by the protruding member height adjusting device 6 as the retracting means.
[0031]
By providing the pressure-sensitive sensor 8, it is possible to prevent the protruding member 2 and the optical disk sheet 1 from coming into contact with each other due to abnormal vibration and damage to the protruding member 2 or the optical disk sheet 1.
[0032]
FIG. 8 is an explanatory view showing a configuration example in which a plurality of projecting members 2 according to the present embodiment are installed. The members corresponding to the members described in FIGS. To do.
[0033]
In FIG. 8, two projecting members 2, 2 are arranged in a direction perpendicular to the rotation center O of the optical disc sheet 1 with respect to the optical disc sheet 1. With such an installation, a stabilization region with less surface blur is generated not only at the portion facing the lower surface of the projecting members 2 and 2 but also near the midpoint between the projecting members 2 and 2. This increases the degree of design freedom. Furthermore, these projecting members 2 and 2 employ a projecting member height adjusting device 6 shown in FIG. 1 to control the gap length so as to maintain an appropriate stabilization state, thereby enabling a wider range and more An appropriate stabilization state will be obtained.
[0034]
As the shape of the protruding member 2, it is possible to adopt various shapes in addition to the columnar shape as described above. However, like the protruding member 2 ′ shown in FIG. A structure of a hollow cylinder that is hollow 2′a parallel to the rotation axis direction Y can be employed. In this case, the positive pressure is particularly prominent in the vicinity of the upstream projecting member 2 ′ with respect to the disk rotation direction, and the hollow 2 ′ a portion of the projecting member 2 ′ is open to atmospheric pressure. Otherwise, no negative pressure is generated in this example at the site where the negative pressure is generated.
[0035]
By making the projecting member 2 'into the hollow cylinder shape as described above, it is possible to particularly increase the repulsive force. For this reason, for example, it is possible to use means for suppressing the excessive repulsive force and performing proper stabilization by giving a constant tension to the protruding member 2 'in the disk surface direction.
[0036]
Also in the case of the configuration shown in FIG. 9, the stabilization state by the protruding member 2 ′ is stored in advance in the stabilization state storage device 4 and is projected by the protruding member height adjusting device 6, as in the configuration example described above. The member 2 'is adjusted to an appropriate height. As a result, even when the rotational speed of the optical disk sheet 1 changes, it is possible to dynamically shift to a more appropriate stabilization state, and the degree of freedom in design increases.
[0037]
Next, with reference to FIGS. 10 to 13, an embodiment of an optical disk apparatus according to the present invention, in which the optical disk drive stabilization apparatus having the above-described configuration is mounted and recording / reproduction with respect to an optical disk sheet is described. In the following description, members corresponding to those described in FIGS. 1 to 9 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0038]
FIG. 10 is a configuration diagram showing a schematic configuration of a main part of the first embodiment of the optical disc apparatus. Reference numeral 10 denotes a laser light source (not shown) for recording / reproducing with respect to the recording surface 1 a of the optical disc sheet 1. An optical pickup unit that emits laser light and receives reflected light to perform reproduction processing, 11 is a pickup driving unit that performs seek control of the optical pickup unit 10, and 12 is a spindle motor that rotationally drives the optical disc sheet 1 ( A projecting member 2 provided with a linear pressure-sensitive sensor 8 at the lowermost end of the optical disc drive stabilization device described above is brought close to the substrate 1b side of the optical disc sheet 1 (not shown). Yes.
[0039]
The optical disk sheet 1 is rotated by a spindle motor around the spindle shaft 12 at a constant rotational speed, and information is received by the optical pickup unit 10 in a stabilization region where there is little surface blurring on the opposite surface of the optical disk sheet 1 from the projecting member 2 installation side. Record / playback. In this way, stable recording / reproduction can be performed.
[0040]
At this time, if it is assumed that the rotation speed of the optical disk sheet 1 is changed, the stabilization state determined in advance from the rotation speed of the optical disk sheet 1, the gap length, and the physical properties of the optical disk sheet 1 is stabilized as described above. It is stored in the state recording device 4. The rotational speed of the optical disk sheet 1 varies depending on the operating state, but the rotational speed is detected by the optical disk rotational speed detector 3 and the information is sent to the stabilization state calculator 5. The stabilization state calculation device 5 determines the optimum gap height of the protruding member 2 based on the information from the stabilization state storage device 4, and adjusts the protruding member 2 to an appropriate height by the protruding member height adjusting device 6. To do. Then, the stabilization state is calculated from the position of the protruding member 2 and the rotational speed of the optical disc sheet 1, and the state is dynamically shifted to the stabilization state. In this way, stable recording / reproduction can be performed.
[0041]
Furthermore, when the pressure sensitive sensor 8 is provided on the protruding member 2 and the pressure sensitive sensor 8 comes into contact with the optical disc sheet 1 due to vibration or the like, the maximum pressure data detected from the pressure sensitive sensor 8 is sent to the pressure determining device 9 to The determination device 9 compares the pressure data with a preset threshold value, and if the pressure is equal to or higher than the threshold value, the protruding member height adjusting device 6 retracts the protruding member 2 from the optical disc sheet 1 and the protruding member 2 and the optical disc sheet This prevents the projecting member 2 or the optical disc sheet 1 from being damaged due to the contact of 1.
[0042]
FIG. 11 is a configuration diagram showing a schematic configuration of a main part of the second embodiment of the optical disc apparatus. In the radial direction of the optical disc sheet 1, the disc rotation speed linearly changes, and the stabilization state also changes accordingly. Therefore, as described based on the configuration example shown in FIG. 5, the stabilization condition recording device 4 stores the stabilization condition for the position of the protruding member 2 in the disk radial direction, and the protruding member 2 moves in the radial direction. At this time, the projecting member radial direction moving device 7 is adapted to dynamically shift to a stable state appropriately so that recording / reproduction can be performed stably.
[0043]
FIG. 12 is a configuration diagram showing a schematic configuration of the main part of the third embodiment of the optical disk apparatus, and a plurality of (two are illustrated in the figure) projecting members 2 are at an angle of 45 ° with respect to the rotation direction. It is arranged with. With this arrangement, as described based on the configuration example shown in FIG. 8, a stable region with less surface blurring occurs near the middle of the installation location of the protruding member, and the optical disc sheet 1 When the rotation speed of the optical disk changes, the optical disk rotation speed detection device 3, the stabilization state storage device 4, the stabilization state calculation device 5, and the stabilization member height adjustment device 6 allow the two protruding members 2 to be connected to an appropriate gap. A stable state can be created dynamically with long control.
[0044]
FIG. 13 is a block diagram showing a schematic configuration of a main part of the fourth embodiment of the optical disk apparatus. In the fourth embodiment, a hollow cylindrical projecting member 2 ′ is employed. As described based on the configuration example shown in FIG. 9, when the hollow cylindrical projecting member 2 ′ is employed, the repulsive force acts more strongly than the other configuration examples. A tension generator 14 that applies tension so as to press against the sheet 1 side is provided so that excessive repulsive force can be suppressed and driving can be performed in an area that generates appropriate stability.
[0045]
【The invention's effect】
As described above, according to the present invention, the sensing means for sensing the contact pressure between the projecting member and the optical disc and the projecting means when the sensing means senses a contact pressure exceeding a preset threshold value. By providing a retracting means for retracting the member from the optical disk surface, it is possible to prevent the optical disk from contacting the protruding member due to abnormal vibration or the like and to prevent damage, and to stabilize the flexible sheet-shaped optical disk. Therefore, reliable rotation drive and recording / reproduction are performed on this type of optical disc.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a basic configuration for explaining an embodiment of an optical disk drive stabilizing device according to the present invention. FIG. 2 is an explanatory diagram showing a part of a side surface of the optical disk drive stabilizing device of FIG. FIG. 4 is a diagram showing an example of data defining the stabilization state when the lower end shape of the projecting member is flat in the embodiment of the optical disk drive stabilizing device according to the present invention. FIG. 4 shows the implementation of the optical disk drive stabilizing device according to the present invention. FIG. 5 is a diagram showing an example of a data table stored in the stabilization state storage device in the embodiment. FIG. 5 is a diagram for explaining a configuration in which a protruding member radial movement device is provided in the embodiment of the optical disk drive stabilization device according to the present invention. FIGS. 6A to 6C are diagrams showing examples of data tables stored in the stabilization state storage device 4 in the embodiment of the optical disk drive stabilization device. FIG. FIG. 8 is an explanatory diagram for explaining a configuration in which a pressure sensor is provided in the embodiment of the optical disk drive stabilization device according to the present invention. FIG. 8 is a configuration example in which a plurality of protruding members are installed in the embodiment of the optical disk drive stabilization device according to the present invention. FIG. 9 is an explanatory diagram for explaining a configuration example in which the protruding member in the embodiment of the optical disk drive stabilizing device according to the present invention has a structure of a hollow cylinder. FIG. 10 is an explanatory diagram of the optical disk device according to the present invention. FIG. 11 is a block diagram showing the schematic configuration of the main part in the first embodiment. FIG. 11 is a block diagram showing the schematic configuration of the main part in the second embodiment of the optical disk apparatus according to the invention. FIG. 13 is a block diagram showing a schematic configuration of the main part in the third embodiment. FIG. 13 is a block diagram showing a schematic configuration of the main part in the fourth embodiment of the optical disk apparatus according to the invention.
DESCRIPTION OF SYMBOLS 1 Optical disk sheet 2 and 2 'Protrusion member 3 Optical disk rotational speed detection apparatus 4 Stabilization state memory | storage device 5 Stabilization state calculating apparatus 6 Protrusion member height adjustment apparatus 7 Protrusion member radial movement apparatus 8 Pressure sensor 9 Pressure determination apparatus 10 Optical pickup unit 11 Pickup drive unit 12 Spindle shaft 14 Tension generator 15 Rotating shaft

Claims (6)

Rotation drive means for rotating a sheet-like optical disk having flexibility, and a vibration in the direction of the rotation axis at least at a portion where writing or reading is performed on the optical disk is installed on the side opposite to the recording surface of the optical disk. An optical disc drive stabilization device using a projecting member projecting in the direction of the optical disc as the stabilizing means, comprising stabilizing means for stabilizing by causing a flow pressure difference.
Sensing means for sensing contact pressure between the projecting member and the optical disc; and retreating means for retracting the projecting member from the optical disc surface when the sensing means senses a contact pressure equal to or higher than a preset threshold value. An optical disk drive stabilization device comprising: 2. The optical disk stabilization apparatus according to claim 1, further comprising a moving means for moving the protruding member from the center of the optical disk toward the outer periphery. 3. The optical disk drive stabilizing device according to claim 1, wherein a plurality of the protruding members are provided. Rotation speed detection means for detecting the rotation speed of the optical disk, storage means for storing information related to the distance between the optical disk and the stabilization member corresponding to the rotation speed of the optical disk constituting the stabilization state, the protruding member and the optical disk, The optical disk stabilization apparatus according to claim 1, further comprising a distance changing unit that changes the relative distance between the optical disk and the optical disk. The optical disk stabilizing device according to claim 1, wherein a hollow portion is formed in a direction of the protruding member toward the optical disk. Rotation drive means for rotating a flexible sheet-like optical disk, an optical pickup for optically writing to and / or reading from the recording surface of the optical disk, and a side opposite to the recording surface of the optical disk And a stabilizing means that stabilizes at least a vibration in the direction of the rotation axis in a portion where writing or reading is performed on the optical disk by causing a pressure difference in the air flow, and projects in the direction of the optical disk as the stabilizing means. An optical disk apparatus comprising an optical disk drive stabilization means having a protruding member that is mounted with the optical disk drive stabilization apparatus according to claim 1 as the optical disk drive stabilization apparatus. Optical disk device to perform.

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