JPH10241317A - Disk cartridge and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the surface wobbling due to the rotation of a disk recording medium, the erroneous recording/reproducing operation of a head and the occurrence of trouble, by mounting sliders generating a floating pressure corresponding to the rotation of the disk recording medium, on the inner wall part confronted with the disk recording medium of a disk cartridge. SOLUTION: A spindle and a turntable are inserted to an inserting hole 21 on the inner wall part 23 of a disk cartridge half, and the inside disk recording medium housed at the side inner than an outside rib 25 is rotationally driven. The information recording, reproducing and erasing operations of the disk recording medium are carried out by inserting an optical or magnetic head from a head window 26. The sliders 6 forming hollow recesses 10 to generate the floating pressure with the rotation of the disk recording medium are arranged and fixed on the recessed part between the inside rib 24 and the outside rib 25 of the inner wall part 23. By this arrangement, the problem such as the damage is generated by the contact with the inner wall part 23 is eliminated even though the disk recording medium is rotated at a high speed, then the erroneous recording/reproducing operation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge for an information recording medium, and more particularly, to a method for preventing a disk runout occurring inside a disk cartridge due to rotation of the disk recording medium, and a method for preventing the disk from running out. The present invention relates to a device provided with a mechanism for preventing surface runout.

[0002]

2. Description of the Related Art Increasing the recording density of optical discs, magneto-optical discs, magnetic discs, and the like is an indispensable technique for making them lighter, thinner, and smaller. It is.

One of the problems when using a high-density disk recording medium lightly, thinly, and small is a problem of surface runout that occurs with rotation of the disk. When the rotating disk oscillates, the disk collides with the recording / reproducing head that scans (scans) the surface of the disk to record / reproduce information / data and crashes (cracks).
Or erroneous operation of recording / reproduction / erasing or erroneous recording occurs. Alternatively, when a disk cartridge is used with a disk built therein, a run-out of a rotating disk recording medium may cause collision, contact, etc. between the disk cartridge and the disk, resulting in damage to the disk and injury. . The disk runout is characterized by the fact that the amplitude increases in the outer peripheral direction of the disk, the surface runout increases as the rigidity of the disk decreases, and the disk runout of the disk with low elasticity causes permanent deformation of the disk. is there.

[0004]

When a disk recording medium such as an optical disk, a magneto-optical disk, or a magnetic disk rotates at a high speed, the disk surface swings right and left. If focusing of the optical head becomes difficult due to surface deflection of the optical disk recording medium, recording information or recording data cannot be recorded, reproduced, or erased on the optical disk recording medium, or erroneous recording or erroneous reproduction of the optical head. May cause malfunction. In the case of a magneto-optical disk recording medium or a magnetic disk recording medium, the recording / reproducing / erasing function of the magnetic head becomes an obstacle.

[0005] The surface runout phenomenon is affected by differences in the diameter of the disk, the thickness of the disk, the rigidity of the disk material, the rotational speed of the disk, and the like. Then, it is necessary to prevent the problem due to the disk cartridge. One of the problems is a problem that the surface run-out does not occur by rotation in the atmosphere, but the surface run-out occurs when the disk cartridge is used in a built-in manner. The second is that even if a high-density disk recording medium can be rotated at a high speed in the atmosphere and used, if it is used by being built in a narrow space of a disk cartridge, the inner circumference of the disk recording medium can be used. This is a problem in that the outer circumference contacts or collides with the inner wall surface of the disk cartridge to cause damage to the disk recording medium.

The above problem is accompanied by a high-speed access for speeding up recording / reproducing or recording / reproducing / erasing of a disk recording medium, and the surface wobble becomes a more serious problem. Also, with the advancement of high-density disk recording media such as miniaturization, thinning, miniaturization and thinning, or miniaturization, thinning and lightening, prevention or reduction of surface runout is an urgent technical problem.

[0007]

According to the present invention, a disk recording medium such as an optical disk, a magneto-optical disk, or a magnetic disk is incorporated in a disk cartridge, and the disk recording medium is rotated at a high speed to perform focusing of an optical head or magnetic recording. The recording information or the recording data is recorded on an optical disk recording medium, a magneto-optical disk recording medium, a magnetic disk recording medium, reproduced,
The present invention relates to a disk cartridge recording medium device that performs erasing or the like.

An object of the present invention is to provide a disk cartridge having a disk recording medium rotatably incorporated therein, wherein at least one slider for applying a floating pressure to the disk recording medium with rotation of the disk recording medium is provided in the disk cartridge. The present invention relates to the use of the slider arranged on the side wall facing the disk recording medium surface, and a greater effect can be obtained as the number of sliders used increases. The buoyant pressure applied to the disk recording medium on which the slider rotates is a pressure based on Bernoulli's principle, which is a hydrodynamic phenomenon of an air flow caused when the disk recording medium rotates.

When using at least one slider for applying a buoyant pressure to a disk recording medium incorporated in a disk cartridge and, if necessary, a plurality of sliders, an elastic body having a certain elasticity is attached to one end of the slider and the elastic body is provided. The other end of the body may be fixed to an inner wall portion of the inner wall portion of the disk cartridge facing the slider arrangement surface of the disk recording medium incorporated in the disk cartridge. As the elastic body, for example, a metal leaf spring, a plastic leaf spring, a metal coil spring, a metal wire bending spring, a ceramic spring, or the like can be used.

Further, in a disk cartridge in which a disk recording medium is rotatably built, a plurality of sliders for giving a floating pressure to the disk recording medium with the rotation of the disk recording medium are provided on the outer surface of the disk recording medium. One slider is arranged at a position facing each surface of the front and back surfaces of the disk recording medium in the perpendicular direction, and two sliders are used in pairs symmetrically with respect to the cross section in the thickness direction of the disk recording medium. It is preferable to use at least one set of two sets of sliders and, if necessary, a plurality of sets attached to the inner wall portion of the disk cartridge.

A slider mounted on a disk cartridge rotatably containing a disk recording medium has an arm attached to the slider so as to float with the rotation of the disk recording medium, and the other end of the arm attached to the disk cartridge. In addition to being used fixed to the inner wall surface, the slider may be configured to apply a necessary floating pressure to the disk recording medium after floating to some extent.

[0012] Still further, in a disk cartridge which rotatably incorporates a flat disk recording medium, a slider which applies a floating pressure to the disk recording medium with rotation of the built-in disk recording medium is used,
When ribs are formed and used to reinforce the side wall of the disk cartridge, the ribs may be used only for disk cartridges having a height equal to or lower than the total height of the slider. is necessary.

Further, in a disk cartridge having a disk recording medium rotatably incorporated therein, at least one slider for giving a floating pressure to the disk recording medium with rotation of the disk recording medium, and if necessary, a number of sliders are provided. When a concave portion for accommodating a slider is formed in the side wall portion of the disk cartridge facing the surface of the disk recording medium subjected to the floating pressure, and the concave portion is used in the concave portion, the height of the accommodated slider is set to the slider of the disk cartridge The height of the disk recording medium facing surface of the slider housed in the recess of the disk cartridge is equal to or higher than the depth of the housing recess, and the height of the slider is stored in the side wall of the disk cartridge. The upper part of the slider is exposed from the recess It is necessary to be.

Further, when the slider is fixed to one end of an elastic body having a certain elasticity and is housed in a concave portion on the side of the disk cartridge facing the surface of the disk recording medium, the surface of the slider facing the disk recording medium. It is necessary to arrange and fix the other end of the elastic body to the disk cartridge so that the elastic member is housed in a state equal to or higher than the height of the peripheral surface of the concave portion of the disk cartridge.

The slider may be fixed to one end of a leaf spring having a certain elasticity, and the other end of the leaf spring may be fixed to a disk cartridge for use.

The distance between the disk recording medium surface and the slider facing the disk recording medium surface is as follows:
It is important that the interval when the disk recording medium stops rotating is set to be larger than the interval when the disk recording medium rotates and the floating pressure of the slider acts on the disk recording medium. is there.

It is preferable that a plurality of sliders used by being attached to a disk cartridge which rotatably incorporates a disk recording medium are arranged at regular intervals on the outer circumference of the disk recording medium.

When a slider for applying a floating pressure to a disk recording medium is attached to a disk cartridge having an annular rib formed thereon, the slider may be an annular rib 2.
Preferably, the two annular ribs formed on the disk cartridge are smaller in height than the height of the slider housed in the recess between the two annular ribs. Is preferred.

In order to arrange the slider at a position opened and closed by a shutter for opening and closing the head window of the disk cartridge, the slider is fixed to one end of a spring having a certain elasticity and the other end of the spring is connected to the disk cartridge. To be fixed.

Further, it is necessary that the slider, which generates a floating pressure as the disk recording medium rotates, is symmetrically disposed on both sides of the disk recording medium in a direction perpendicular to the surface of the disk recording medium. It is. In this case, in order to obtain a great effect, it is necessary to arrange a plurality of pairs in the outer peripheral portion of the disk recording medium in a paired configuration.

[0021] Furthermore, at least one of the above-mentioned methods for applying a floating pressure to the disk recording medium with the rotation of the disk recording medium.
One slider may be formed of a resin molded integrally with the disk cartridge half.

[0022] Furthermore, at least one of the above-mentioned methods for applying a floating pressure to the disk recording medium with the rotation of the disk recording medium.
An elastic arm may be formed on one of the sliders, and the elastic arm of the slider and the disk cartridge may be connected to each other and integrally formed of resin.

[0023] Furthermore, at least one of the levitation pressures applied to the disk recording medium as the disk recording medium rotates.
It is also possible to use a disk cartridge in which a semi-annular plate integrally formed with two sliders is attached to the inner wall of the disk cartridge.

According to the manufacturing method of the present invention, at least one slider mold for applying a floating pressure to the disk recording medium with rotation of the disk recording medium and a mold for the disk cartridge half are integrally formed. Using a mold of a disk cartridge half and a mold of a second disk cartridge half mirror-symmetrical to the mold of the first disk cartridge half, the first mold surface and the second mold surface are used. It can be manufactured by assembling a first disk cartridge half and a second disk cartridge half produced by injection molding a molten resin.

Also, an elastic arm is formed on at least one slider that applies floating pressure to the disk recording medium as the disk recording medium rotates, and the elastic arm of the slider and the disk cartridge half are connected. The third mold surface of the third disk cartridge half is integrally formed, and the mold of the fourth disk cartridge half is mirror-symmetrical to the mold of the third disk cartridge half. Also, it can be manufactured by assembling a third disk cartridge half and a fourth disk cartridge half produced by injection molding a molten resin on the fourth mold surface.

[0026] Further, at least one of the levitation pressures which gives a floating pressure to the disk recording medium with the rotation of the disk recording medium.
Using a first mold of a semi-annular plate formed with two sliders, and a second mold having a mirror symmetry with the first mold, the first mold surface and the second mold surface are formed on the first mold surface and the second mold surface. A first semi-annular plate and a second semi-annular plate are produced by injection molding of a molten resin, and the first semi-annular plate is fixed to a first disk cartridge half, and It can also be manufactured by fixing the annular plate to the second disk cartridge half and then assembling the first disk cartridge half and the second disk cartridge half.

In the disk cartridge having the disk recording medium of the present invention rotatably built therein, a slider for generating a floating pressure with the rotation of the disk recording medium is formed on a side wall of the disk cartridge half facing the disk recording medium. First disk cartridge half and second disk cartridge
And manufacturing the disk cartridge half by inserting the disk recording medium between the first and second disk cartridge halves to assemble the disk cartridge integrally.

Further, in the disk cartridge of the present invention in which the disk recording medium is rotatably built, a thin plate having a slider for generating a buoyant pressure with the rotation of the disk recording medium is produced, and the thin plate is formed into a first plate. The first and second disk cartridge halves having the thin plate fixed thereto are adhered or mechanically fixed to the side walls of the disk cartridge half and the second disk cartridge half facing the disk recording medium. It may be manufactured by a method in which the disk recording medium is inserted therebetween to assemble the disk cartridge integrally.

Still further, in the disk cartridge having the disk recording medium of the present invention rotatably built therein, a floating pressure is generated on the side wall of the disk cartridge half facing the disk recording medium with the rotation of the disk recording medium. A first disk cartridge half and a second disk cartridge half having a concave cavity into which a slider is inserted are prepared, and the slider is inserted into the concave cavity of the first and second disk cartridge halves. The first and the second fixed with the slider inserted and fixed.
The disk recording medium may be inserted between the disk cartridge halves to assemble the disk cartridge integrally.

Still further, the disk cartridge of the present invention in which the disk recording medium is rotatably built therein is manufactured by manufacturing a thin plate part having a concave cavity into which a slider for generating a buoyant pressure with the rotation of the disk recording medium is inserted. Inserting the slider into the concave cavity of the thin plate, fixing the slider, and then attaching the slider to the side wall of the first disk cartridge half and the second disk cartridge half facing the disk recording medium. Fixed to
Finally, the disk cartridge can be manufactured by inserting the disk recording medium between the first and second disk cartridge halves to which the thin plate is fixed, and assembling the disk cartridge integrally.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is applicable to a case where a disk recording medium, such as an optical disk, a magneto-optical disk, or a magnetic disk, capable of high-density recording is incorporated in a disk cartridge and has a high strength. The thickness of the disk is thin, the small surface vibration generated when rotating at high speed, using a slider that generates a floating pressure with the rotation of the disk recording medium, to prevent the surface vibration, and The present invention relates to an apparatus and a method for softening the surface vibration. The apparatus of the present invention is configured such that a slider that generates a buoyant pressure with the rotation of the disk recording medium is mounted on an inner wall surface of the disk cartridge containing the disk recording medium that faces the side surface of the disk recording medium. .

[0032]

【Example】

Embodiment 1 FIG. 1 is a plan view showing the inside of one half of a disk cartridge for an optical disk recording medium used in this embodiment. Information recording on disk recording media,
Reproduction and erasing are performed by inserting an optical head or a magnetic head from the head window 26. Reference numeral 21 denotes an insertion hole for a spindle and a turntable for rotating the disk recording medium. The slider 6 that generates a buoyant pressure with the rotation of the disk recording medium is installed in the concave portion 27 between the outer rib 25 and the inner rib 24 of the disk cartridge composed of the frame 23. Outer rib 2 of FIG.
The disk recording medium is accommodated inside the disk recording medium 5, and the slider 6 is arranged on the outer peripheral side of the disk recording medium. A hollow recess 10 is formed in the slider 6. The total height or thickness of the slider 6 was higher than the height of the annular ribs 24 and 25. The slider 6 can be attached to the disk cartridge by a method of separately preparing the slider 6 and bonding it with an adhesive, a method of mechanically fitting the slider 6 on the side wall of the disk cartridge half, and the like. However, a mold for forming a plurality of sliders 6 in a disk cartridge half is manufactured, and using this mold, a resin disk cartridge half in which the slider 6 and the disk cartridge half are integrated is injection-molded and manufactured. Can be. For a slider 6 component made of metal or ceramic, the slider 6 component and the disc cartridge half can be integrally formed by insert molding using a mold for the disc cartridge half.

As the component material of the slider 6, the ceramic material is DLC (diamond-like crystal carbon), alumina (Al2O3), silicon carbide, titanium carbide, silicon nitride,
Aluminum nitride, titanium nitride, quartz, zirconia, silicon oxide, etc., and resin materials such as polyacrylonitrile, pophenylene sulfide, polymethylpentene, polybutene, polyimide, polyester, fluorine resin, polycarbonate, polyvinyl alcohol , Polystyrene, polymethyl methacrylate, polypropylene, polyethylene, nylon and the like.

Embodiment 2 FIG. 2 is a sectional view of a disk cartridge incorporating a magneto-optical disk recording medium 1.
The disk cartridge is opened and closed by a head window and a shutter hole by a shutter 32. The shutter 32 is fixed to a shutter slider 28,
The shutter slider 28 is connected to a slip-off preventing component 30 by a connecting portion 29, and is a mechanism in which the shutter slider 28 slides on the rail 23 of the disc cartridge frame portion.

The slider 6 which generates a floating pressure with the rotation of the disk recording medium is provided on both sides of the disk 1.
They are symmetrically arranged in pairs and are fixed to the side wall of the disk cartridge. FIG. 2 shows a state where two sets are visible.

The disk cartridge half 3 shown in FIG.
The sliders 6 formed in 5A and 35B form a mold for forming a plurality of sliders 6 in a disk cartridge half, and the mold is attached to a resin injection molding machine to injection-mold polypropylene resin. A disk cartridge half made of polypropylene resin and polyethylene terephthalate resin in which the disk cartridge half was integrated with the disk cartridge half was manufactured and assembled.

Embodiment 3 FIG. 4 shows an annular thin plate (thickness 0.05 mm) 17 of stainless steel (SUS305).
A plurality of sliders 6 each having a concave cavity 10 which generates a buoyant pressure with the rotation of a disk recording medium on one side of the disk are bonded and fixed. The slider 6 was made of an ABS resin (acrylic / butadiene / styrene mixed resin) material, a polycarbonate resin material, a polypropylene resin, a phenol resin material, and the like. A plurality of sliders 6 for generating a floating pressure shown in FIG. 4 are fixed to the annular thin plate 17, and the annular thin plate 17 is further attached to one disk cartridge half 35.
A and fixed to the inner wall of the magneto-optical disk recording medium 1
Was assembled into a disk cartridge. The positional relationship between the annular thin plate 17 and the disk cartridge half 35A was determined by fitting and fixing the concave portion 27 between the outer rib 25 and the inner rib 24 on the inner wall of the disk cartridge half 35 shown in FIG. .

Embodiment 4 An annular thin plate component 17 having a structure in which a plurality of sliders 6 for generating buoyant pressure shown in FIG. 4 are fixed is used for two disk cartridges of a disk cartridge incorporating a magneto-optical disk recording medium 1. Half 35
A and 35B were used by being adhered and fixed to both. Slider 6
Has a concave cavity 10 formed therein. However, two of the components 17 of the annular thin plate having the structure in which the plurality of sliders 6 are fixed are a component 17A shown in FIG. 4 and a component 17A shown in FIG.
This is a combination of the described component and a mirror-symmetric component 17B. Two of the annular thin plate parts 17 provided with the plurality of sliders 6 are arranged one by one on the inner wall portions of the disk cartridge halves 35A and 35B opposed to the front and back surfaces of the magneto-optical disk. As shown in the sectional view of FIG. 2, the arrangement of the two disk cartridge halves 35 of the disk cartridge is symmetrical about the magneto-optical disk.
A and 35B were adhesively fixed to the inner wall. Others are Example 3.
Is the same as

Fifth Embodiment A plurality of sliders 6 for generating a floating pressure are arranged in two rows on a thin annular plastic plate 177 as shown in FIG. The sliders 6 for generating the buoyant pressure in each row are arranged and fixed adjacent to each other at an empty position so as not to be arranged between the two rows. The annular thin plate component 177 in which the plurality of sliders 6 are arranged in two rows is arranged and fixed to one inner wall portion of two disk cartridge halves of a disk cartridge incorporating the magneto-optical disk recording medium 1. Others are the same as the third embodiment.

Sixth Embodiment A plurality of sliders 6 for generating a buoyant pressure according to the fifth embodiment are arranged in two rows on a wide annular plastic thin plate 177 as shown in FIG. 177A and a part 177B, not shown, which is mirror-symmetrical to the 177A part, are manufactured, and these two parts are placed on the two disk cartridge halves 35 of the disk cartridge facing the front and back surfaces of the magneto-optical disk.
A disk cartridge containing the magneto-optical disk recording medium 1 was assembled and used one by one on the inner wall portions of A and 35B. Others are the same as the fourth embodiment.

Embodiment 7 A recess 37 is formed in the inner wall portion of the disk cartridge half plate 23 of the disk cartridge in which the magneto-optical disk recording medium 1 is built.
The slider 6 is inserted and fixed in 7. As the slider 6 inserted and fixed, a slider 6 having two air flow grooves 39 and a concave cavity 11 in the center was used. FIG. 5 shows a structure in which the slider 6 is inserted and fixed to the inner wall portion of the disk cartridge half plate 23. The surface of the slider 6 facing the magneto-optical disk recording medium was used in a structure protruding from the plane of the disk cartridge half plate 23.

Embodiment 8 A concave portion 37 for inserting the slider 6 is formed in the disk cartridge half plate 23 of the disk cartridge containing the magneto-optical disk recording medium 1, and the elastic arm of the slider 6 is mechanically formed in the concave portion 37. There is a hole to fix it. FIG. 6 shows a structure in which one air circulation groove 39 is formed in the recess 37, the slider 6 having the concave cavity 11 in the center is inserted, and the elastic arm of the slider 6 is inserted into the hole and mechanically fixed. Indicated. The side surface of the magneto-optical disk recording medium of the slider 6 has a structure protruding from the surface of the disk cartridge half plate 23,
Further, the slider 6 was fixed so as to be able to vertically vibrate under the convection of air.

<< Embodiment 9 >> A thickness of 0.05 to 0.3 m
An annular belt 18 made of a plastic having an area of m and having recesses 37 for inserting the slider 6 at some points was produced. One air flow groove 39 was formed in the concave portion 37 of the plastic annular band 18, and the slider 6 provided with the concave cavity 11 in the center was inserted and bonded and fixed. FIG. 7 shows the plastic annular band 18 to which the slider 6 is adhered and fixed, which is fixed to the inner wall portion of the disk cartridge half plate 23 of the disk cartridge incorporating the magneto-optical disk recording medium 1. The slider 6 had a structure in which the side facing the magneto-optical disk recording medium was protruded from the side plate surface of the plastic annular band 18.

Example 10 A plastic annular band used in Example 9 and having a thickness in the range of 0.05 to 0.3 mm, and the insertion recess 37 of the slider 6 was provided in some places.
In place of the slider 6, a slider 6 having no air flow groove 39 and having a concave cavity 11 in the center is inserted into the slider 18 and the side surface of the slider 6 is made of a plastic ring. It was formed at the same height as the band surface and used. This embodiment is shown in FIG.

<< Embodiment 11 >>
Among the embodiments of the slider 6 that generates a floating pressure with the rotation of the disk recording medium, the slider 6 is manufactured as a separate part and fixed to the side wall of the disk cartridge by an adhesive or the like, or the disk cartridge is formed of a plastic material. An example in which the slider 6 and the slider 6 are integrally formed by injection molding was used. FIGS. 9 and 10 show the outer shapes of the slider 6 components that generate the buoyancy used at this time. The slider 6 has an inclined cross section in the direction opposite to the rotation direction of the disk recording medium, and the protrusion 40 is disposed so as to be separated from the surface of the disk recording medium, and the concave cavity 10 of the slider 6 and the air flow groove are provided. Reference numeral 13 is used to face the surface of the disk recording medium.

FIG. 9 shows a case where the concave cavity 10 is circular and one air flow groove 13 is formed. The concave cavity 10 may be a through hole or a cave. FIG. 10 shows a configuration in which the concave cavity 11 is square and one air flow groove 13 is formed. Also in this case, the concave cavity 11 may be a penetrating hole or a cavity.

Embodiment 12 The embodiment 12 used in the embodiment of the present invention
FIG. 11 shows an embodiment in which the elastic arm is held among the embodiments of the slider 6 that generates a floating pressure with the rotation of the disk recording medium. The slider 6 has an inclined cross section in the direction opposite to the rotation direction of the disk recording medium, and the protrusion 40 is disposed so as to be separated from the surface of the disk recording medium, and the concave cavity 10 of the slider 6 and the air flow groove are provided. 1
Reference numerals 2 and 13 face the surface of the disk recording medium.

FIG. 11A shows an example in which the concave cavity 10 is circular, has one air flow groove 13, and the elastic leaf spring is integrally formed of the same material as the slider 6. FIG.
(B) is an embodiment in which the concave cavity 11 is square, has one air flow groove 13, and insert-molds two metal wires on an elastic spring. FIG. 11C shows an example in which the concave cavity 11 has a square shape, two air circulation grooves 12 are provided, and the elastic leaf spring is integrally formed of the same material as the slider 6.

Embodiment 13 FIG. 12 is a plan view showing an inner wall portion of a disk cartridge half 23 of a disk cartridge incorporating the optical disk recording medium 1 used in this embodiment. Reference numeral 26 denotes a head window, and reference numeral 21 denotes a spindle hole for driving a disk recording medium. Reference numerals 24 and 25 denote inner and outer ribs for reinforcement inside the disk cartridge half. The slider 6, which generates a floating pressure with the rotation of the disk recording medium, is provided between the inner peripheral rib 24 and the outer peripheral rib 2 of the disk cartridge half 23.
5 is produced by injection molding together with a disk cartridge half using an injection molding die prepared so as to be set at a predetermined wall portion between 5 and 5. FIG. 13 is an enlarged view of one of the sliders 6 formed on the disk cartridge half 23 and generating a plurality of floating pressures. 39 is an air circulation groove, and 10 is a concave cavity. 14A is a cross-sectional view taken along the line BB ′ of FIG. 13, and FIG. 14B is a cross-sectional view taken along the line AA ′ of FIG. An annular groove is provided between the slider 6 that generates the floating pressure and the ribs 24 and 25. The upper portion of the slider 6 protrudes from the convex plane of the disk cartridge half 23.

The material of the slider and the disk cartridge half is a plastic material used for a general disk cartridge, for example, polyacrylonitrile, polyphenylene sulfide, polymethylpentene, polybutene,
Polyimide, polyester, fluorine resin, polycarbonate, polyvinyl alcohol, polystyrene, polymethyl methacrylate, polypropylene, polyethylene, nylon and the like can be used. In this embodiment, polypropylene resin and polyethylene terephthalate resin are used.

Using the disk cartridge half 23 with the slider 6 manufactured as described above, a disk cartridge was assembled by incorporating a phase-change type optical disk recording medium. The cross-sectional structure is as shown in FIG. The feature of this embodiment is that since the disk cartridge half with the slider 6 is used, the thickness of the disk cartridge half with the slider 6 can be reduced, and the overall thickness of the disk cartridge can be made extremely thin. Therefore, it is preferable to use the optical disk for a small-diameter thin optical disk having a high-density recording capacity.

Example 14 A high-capacity magnetic recording disk using a plastic substrate was used as the disk recording medium of Example 13. Others are the same as the thirteenth embodiment.

[Embodiment 15] FIGS. 16 and 18 show an embodiment of a method of arranging a plurality of sliders 6 which generate a floating pressure with the rotation of a disk recording medium in a predetermined arrangement and mounting the sliders 6 on a disk cartridge half. Show. That is, a mold in which a plurality of sliders 6 are arranged in a predetermined arrangement is prepared in advance, and using this mold, a single plastic semi-annular flat plate 178, 1 in which a plurality of sliders are arranged in a semi-circular shape.
No. 79 was produced by injection molding. FIG. 17 is an enlarged view of one of the sliders 6 shown in FIG. The surface on which the air flow groove 39 and the concave cavity 10 of the slider 6 are formed is the same height as the surface of the plastic semi-annular flat plate 178, or the surface of the slider 6 projects. The plurality of sliders 6 are integrally formed by injection molding so as to be connected to the plastic semi-annular flat plate 178 by the elastic arm 41. Further, the slider 6 can freely move and vibrate in the insertion space of the plastic semi-annular flat plate 178, and in a stationary state,
It has the function of returning to the standard position with the elastic arm and always being fixed.

FIG. 18 shows an embodiment of a plastic semi-circular flat plate 179 in which a plurality of sliders 6 are arranged in one row, and FIG. 16 shows an example of a plastic semi-annular flat plate 178 in which a plurality of sliders 6 are arranged in two rows. Things.
As a plastic material, it is possible to use polyacrylonitrile, polyphenylene sulfide, polymethylpentene, polybutene, polyimide, polyester, fluorine resin, polycarbonate, polyvinyl alcohol, polystyrene, polymethyl methacrylate, polypropylene, polyethylene, nylon, polyethylene terephthalate resin, or the like. Although it is possible, a polycarbonate resin was used in this example.

<< Embodiment 16 >> FIGS. 19, 20, 21 and
Each of FIGS. 22A and 22B shows four examples in which the slider 6 that generates a buoyant pressure as the disk recording medium rotates is manufactured by injection molding of a plastic material. FIG. 19 shows a structure in which the slider 6 is connected to the plastic semi-circular flat plate 179 by an elastic arm so that it can freely move on the plastic semi-circular flat plate 179 which is fixed to the inner wall of the disk cartridge half 23. FIG. 20 shows an embodiment of the slider 6 having a structure in which the air flow groove 39 and the concave cavity 11 are formed in the inner wall portion of the disk cartridge half 23. FIG. 21 shows an embodiment of a structure in which the entire slider 6 projects from the inner wall of the disk cartridge half 23. FIG. 22 shows an embodiment of the slider 6 having a structure in which only the concave cavity 11 is formed in the inner wall portion of the disk cartridge half 23 and the air circulation groove 39 is not provided.

[0056]

According to the present invention, there is provided a disk cartridge incorporating a disk recording medium according to the present invention, in which a slider 6 for generating a floating pressure with the rotation of the disk recording medium is attached to an inner wall portion facing the disk recording medium. In addition, it was possible to prevent the runout due to the rotation of the disk recording medium built in the disk cartridge. As a result, even if a high-density disk recording medium is built into the narrow space of the disk cartridge and rotated at high speed,
The problem that the disk recording medium comes into contact with or collides with the inner wall surface of the disk cartridge to cause damage to the disk recording medium is eliminated, and malfunction of recording and reproduction of the head can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a disk cartridge half for an optical disk.

FIG. 2 is a sectional view of a disk cartridge with a built-in magneto-optical disk.

FIG. 3 is a perspective view of an annular thin belt in which a plurality of sliders that generate buoyancy are attached in two rows in parallel.

FIG. 4 is a perspective view of an annular thin belt on which a plurality of sliders that generate floating pressure are mounted in a single row.

FIG. 5 is a plan view of a part in which a plurality of sliders that generate buoyancy are inserted and attached to a concave cavity of a disk cartridge.

FIG. 6 is a plan view of a part where a plurality of sliders that generate floating pressure are inserted and attached to a concave cavity of a disk cartridge half.

FIG. 7 is a plan view of a part where a plurality of sliders that generate floating pressure are inserted and attached to a concave cavity of the disk cartridge half.

FIG. 8 is a plan view of a part where a plurality of sliders that generate floating pressure are inserted and attached to the concave cavity of the disk cartridge half.

FIG. 9 is a perspective view of a slider that generates a floating pressure.

FIG. 10 is a perspective view of a slider that generates a floating pressure.

FIG. 11 is a perspective view of an elastic arm formed by a slider that generates a floating pressure.

FIG. 12 is a front view of a disk cartridge half for an optical disk.

FIG. 13 is a top view of a slider that generates a floating pressure.

FIG. 14 is a side view of a slider that generates a floating pressure.

FIG. 15 is a sectional view of a disk cartridge with a built-in disk recording medium.

FIG. 16 is a perspective view of an annular thin belt in which a plurality of sliders that generate floating pressure are attached in two rows in parallel.

FIG. 17 is a perspective view of a slider that generates a floating pressure.

FIG. 18 is a perspective view of an annular thin belt on which a plurality of sliders that generate floating pressure are mounted in a single row.

FIG. 19 is a plan view of a part where a slider that generates a floating pressure is injection-molded integrally with a plastic semi-annular flat plate.

FIG. 20 is a plan view of a part where a slider that generates a floating pressure is injection-molded integrally with a disk cartridge half.

FIG. 21 is a plan view of a part where a slider that generates a floating pressure is injection-molded integrally with a disk cartridge half.

FIG. 22 is a plan view of a part where a slider for generating a floating pressure is injection-molded integrally with a disk cartridge half.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Disc recording medium 6 Slider which generates floating pressure 17, 177, 178, 179 An annular thin belt to which a slider which generates floating pressure is attached 23 Disk cartridge half inner wall portion 37 Slider concave portion which generates floating pressure

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Satoru Onuki 1-88 Ushitora, Ibaraki-shi, Osaka Prefecture Inside Hitachi Maxell Co., Ltd. Hitachi Maxell, Ltd.

Claims (24)

[Claims] 1. A disk cartridge in which a disk recording medium is rotatably built therein, at least one slider for giving a floating pressure to the disk recording medium with rotation of the disk recording medium is opposed to a surface of the disk recording medium. A disc cartridge which is arranged on an inner wall portion of the disc cartridge. 2. A disk cartridge in which a disk recording medium is rotatably contained, wherein at least one slider that applies a buoyant pressure to the disk recording medium with rotation of the disk recording medium is formed of an elastic body having a certain elasticity. A disc cartridge fixed to one end, and the other end of the elastic body is arranged and fixed to a side wall portion inside the disc cartridge facing a plane of the disc recording medium. 3. A disk cartridge in which a disk recording medium is rotatably built, wherein a plurality of sliders for giving a floating pressure to the disk recording medium with rotation of the disk recording medium are provided on an outer peripheral side surface of the disk recording medium. A set of at least two sliders arranged to face each of the front and back surfaces of the disk recording medium in a vertical direction,
A disk cartridge, wherein each slider is attached to a side wall portion in the disk cartridge. 4. A disk cartridge in which a disk recording medium is rotatably built therein, the disk cartridge having at least one elastic arm which floats with the rotation of the disk recording medium and applies a floating pressure to a surface of the disk recording medium. A slider is disposed on a side wall portion facing the outer peripheral side surface of the disk recording medium inside the disk cartridge,
A disc cartridge, wherein an elastic arm of the slider is fixed to the disc cartridge. 5. A disk cartridge in which a disk recording medium is rotatably built therein, wherein a slider for applying a floating pressure to the disk recording medium with rotation of the disk recording medium is provided on the disk cartridge facing the disk recording medium surface. A concave portion is formed in the side wall portion and used, and the height of the disk recording medium facing surface of the slider stored in the concave portion of the disk cartridge is equal to or exposed from the side wall portion of the disk cartridge. A disc cartridge characterized in that it is configured to be housed at a height of about 10 mm. 6. A disk cartridge in which a disk recording medium is rotatably built, a slider for giving a floating pressure to the disk recording medium with rotation of the disk recording medium is fixed to one end of an elastic body having a certain elasticity. hand,
A concave portion is formed in the side wall portion of the disk cartridge facing the disk recording medium surface and is used for storage, and the height of the disk storage medium-facing surface of the slider stored in the concave portion of the disk cartridge is equal to that of the disk. The other end of the elastic body is fixed to the disk cartridge so as to be housed at the same height as the side wall of the cartridge or at the height exposed from the concave portion. 7. A disk cartridge in which a disk recording medium is rotatably housed, a surface of the disk cartridge facing the flat surface of the disk recording medium floating on the disk recording medium as the disk recording medium rotates. At least one slider for applying pressure is used, and the slider is provided in a rib section having a height equal to or less than the total height of the slider defined on the side wall portion of the disk cartridge facing the disk recording medium surface. A disk cartridge characterized by being arranged. 8. The method of claim 1, 2, 3, 4, 5, 6, or 7.
3. The disc cartridge according to claim 1, wherein the slider is fixed to one end of a leaf spring having a certain elasticity, and the other end of the leaf spring is fixed to the disc cartridge. 9. The method of claim 1, 2, 3, 4, 5, 6, or 7.
In the above, the distance between the disk recording medium surface and the slider portion facing the disk recording medium surface is such that the floating pressure of the slider accompanying the rotation of the disk recording medium is applied when the rotation of the disk recording medium is stopped. A disc cartridge characterized by being set to be larger than an interval at the time. 10. The disk cartridge according to claim 3, wherein at least one of the opposing sliders is directly fixed to the disk cartridge. 11. The method according to claim 1, wherein the sliders are arranged at regular intervals on an outer circumference of the disk recording medium. Disk cartridge. 12. The disk cartridge according to claim 5, wherein the slider is disposed in an annular recess surrounded by two annular ribs. 13. The method of claim 1, 2, 3, 4, 5, 6, and 7, wherein at least one of the sliders comprises:
The slider is fixed to one end of a spring having a certain elasticity, the other end of the spring is fixed to the disk cartridge, and the slider is arranged at a position opened and closed by a shutter for opening and closing a head window of the disk cartridge. Disk cartridge. 14. The disk drive according to claim 1, wherein the slider that generates a buoyant pressure with the rotation of the disk recording medium is perpendicular to the surface of the disk recording medium. A pair of sliders symmetrically arranged on both sides of the disk recording medium in a direction, and each of the sliders is attached to the inner wall portion of the disk cartridge facing each of both surfaces of the disk recording medium. A disc cartridge comprising at least one set of sliders. 15. A disk cartridge in which a disk recording medium is rotatably contained, wherein at least one slider for giving a floating pressure to the disk recording medium with rotation of the disk recording medium is resin-molded integrally with the disk cartridge half. A disk cartridge characterized by being made. 16. A disk cartridge having a disk recording medium rotatably built therein, wherein at least one slider for applying a floating pressure to the disk recording medium with rotation of the disk recording medium is provided with an elastic arm. A disk cartridge, wherein the elastic arm of the slider and the disk cartridge are connected to each other and are integrally formed of resin. 17. A disk cartridge in which a disk recording medium is rotatably built, a semi-annular plate integrally formed with at least one slider for giving a floating pressure to the disk recording medium as the disk recording medium rotates. A disk cartridge which is mounted on an inner wall of the disk cartridge. 18. A method of manufacturing a disk cartridge in which a disk recording medium can be rotatably contained, wherein at least one slider type and a disk cartridge half for applying a floating pressure to the disk recording medium as the disk recording medium rotates. The first mold in which the mold of
The first mold surface and the second mold surface using a mold of the disc cartridge half and a mold of the second disc cartridge half which is mirror-symmetrical to the mold of the first disc cartridge half. A first disk cartridge half and a second disk cartridge half manufactured by injection-molding a molten resin into a disk cartridge. 19. A method of manufacturing a disk cartridge capable of rotatably incorporating a disk recording medium, wherein an elastic arm is formed on at least one slider that applies a floating pressure to the disk recording medium as the disk recording medium rotates. A third disk cartridge half mold integrally formed by connecting the elastic arm of the slider and the disk cartridge half, and a fourth mirror mirror-symmetrical to the third disk cartridge half mold. A third disk cartridge half and a fourth disk cartridge half prepared by injection molding a molten resin on the third mold surface and the fourth mold surface using the mold of the disc cartridge half. Manufacturing a disk cartridge characterized by being manufactured by assembling Method. 20. A method of manufacturing a disk cartridge capable of rotatably incorporating a disk recording medium, the method comprising: forming a semi-annular shape having at least one slider for applying a floating pressure to the disk recording medium as the disk recording medium rotates. By using a first mold for plate molding and a second mold mirror-symmetric to the first mold, a molten resin is injection-molded on the first mold surface and the second mold surface. A first semi-annular plate and a second semi-annular plate are manufactured, and the first semi-annular plate is fixed to a first disk cartridge half.
Characterized in that the semi-circular plate is fixed to a second disk cartridge half, and then the first disk cartridge half and the second disk cartridge half are assembled to produce the disk cartridge. . 21. A disk cartridge in which a disk recording medium is rotatably incorporated, wherein a slider for generating a floating pressure with the rotation of the disk recording medium is formed on a side wall of the disk cartridge half facing the disk recording medium. Manufacturing a first disk cartridge half and a second disk cartridge half; and inserting the disk recording medium between the first and second disk cartridge halves to assemble the disk cartridges integrally. A method for manufacturing a disk cartridge. 22. A step of manufacturing a thin plate having a slider that generates a floating pressure with the rotation of the disk recording medium in a disk cartridge having a disk recording medium rotatably built therein, and using the thin plate as a first disk cartridge. Fixing the half and second disk cartridge halves to the side wall portion facing the disk recording medium, and inserting the disk recording medium between the first and second disk cartridge halves to which the thin plate is fixed. And assembling the disk cartridge together. 23. In a disk cartridge in which a disk recording medium is rotatably built, a slider that generates a floating pressure with rotation of the disk recording medium is inserted into a side wall of the disk cartridge half facing the disk recording medium. Manufacturing a first disk cartridge half and a second disk cartridge half having a concave cavity, and inserting and attaching the slider to the concave cavity of the first and second disk cartridge halves; And a step of inserting the disk recording medium between the first and second disk cartridge halves to which the slider is inserted and fixed, and assembling the disk cartridge integrally. . 24. A step of producing a thin plate having a concave cavity into which a slider for generating a buoyant pressure in accordance with rotation of a disk recording medium is formed in a disk cartridge in which a disk recording medium is rotatably housed. Inserting the slider into the concave cavity and attaching the slider to the side walls of the first disk cartridge half and the second disk cartridge half facing the disk recording medium. When,
Inserting the disk recording medium between the first and second disk cartridge halves to which the thin plate is fixed, and assembling the disk cartridge integrally.