JPS61170970A - Rotary recording medium - Google Patents

Abstract

PURPOSE:To facilitate extremely handling and to rotate a recording medium at a high speed in the stable rotary state by installing an aeration means for aerating a space between a thin film-like recording medium and a supporting substrate in the vicinity of a center in said recording medium. CONSTITUTION:In terms of the supporting substrate B, a joint 5 made of a ferromagnetic material is fitted in and bonded in the center of a main body 4 composed of a plate body made of nonmagnetic material. A recording layer 1r is constituted on a the thin-film-like recording medium A having recording layer 1r constituted on its surface 1 and the flexibility and the supporting substrate B which retains the flatness of the surface without modification at high speed rotation and has appearance similar to the substrate A are formed into one body by adhering the inner peripheral rear side than the position where aeration holes 3, 3... of the recording medium A to the corresponding part of the supporting substrate B. When a rotary drive mechanism rotates the rotary recording medium over 1,000rpm per min, for instance, an air cushion caused by the thin layer of air arises between the thin film-like recording medium A and the supporting substrate B, and the former can execute the high speed rotation in the state where its surface is flat.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary recording medium that allows information signals to be recorded and reproduced at high recording density.

(Prior Art) In recent years, high-density recording and reproduction of information signals has become necessary in various technical fields.

Of course, attempts have been made to realize this using magnetic recording and reproducing methods, optical recording and reproducing methods, magneto-optical recording and reproducing methods, and various other well-known recording and reproducing methods. A recording medium whose recording layer is made of a material that undergoes a phase change from an amorphous state to a crystalline state, or from a crystalline state to an amorphous state, due to the application of an electric field, electric current, heating, etc. There is also the possibility of rewriting. This has attracted attention, and research into the practical application of high-density recording and reproducing systems for information signals using such recording media has been actively conducted.

Well, no matter what recording and playback method is used,
It goes without saying that the mutual relationship between the information recording medium and the recording/reproducing element used when recording and reproducing information signals must be in a predetermined relationship. When the recording/reproducing element used when recording and reproducing information signals is required to be in good contact with the recording medium, such as when the method is a magnetic recording/reproducing method, Magnetic record II used as a medium! Good contact must be made between the medium and the magnetic head used as a recording/reproducing element.

By the way, as magnetic recording media used in the conventional magnetic recording and reproducing system, various configurations are known, such as tape-shaped ones, sheet-shaped ones, and disc-shaped ones. Disc-shaped magnetic recording media include rotary magnetic recording media discs (for example, rigid general magnetic discs) in which a recording layer made of magnetic material is formed on the surface of a rigid disc, and flexible discs. 2. Description of the Related Art Rotating magnetic recording medium disks (eg, floppy disks) in which a recording layer made of a magnetic material is formed in a thin film are widely known.

(Problems to be Solved by the Invention) Among the above-mentioned rotary magnetic recording medium disks, the general rigid type magnetic disk requires polishing with extremely high precision on the surface of the synthetic resin disk. After that, a recording layer made of magnetic material is attached by applying means such as plating or vapor deposition, so it is naturally expensive (1°)! J6S″kg! 65′(
7): k, al! i 'II @ f-a h
41l19'-ry A problem arises in that the flying magnetic head used for recording information signals on disks and reproducing information signals from magnetic disks that rotate at high speed is easily damaged. A rotating magnetic recording medium disk, in which a recording layer made of a magnetic material is constructed from a thin film having a Although the contact condition with the head can be relatively good, when it is rotated at high speed and used,
Complicated vibrations or waves occur on the surface of a rotating magnetic recording medium disk in which a flexible thin film has a recording layer made of a magnetic material, so that the contact between the recording surface of the single rotating magnetic recording medium disk and the magnetic head is caused. The contact condition becomes completely poor, and good recording and reproducing operations cannot be performed.

Furthermore, when a rotary recording medium disk whose recording layer is made of a flexible thin film is rotated at high speed, the vibrations or waves generated on the surface of the recording medium disk make recording and reproducing operations impossible, which is the problem mentioned above. To solve this problem, an air cushion is generated on a turntable that is rotated at high speed together with a recorded recording medium disk made of a flexible thin film, and optical information from the recorded recording medium disk made of a flexible thin film is generated. The information signal is reproduced by the digital recording/reproducing method from the recorded recording medium disk made of a flexible thin film placed on the air cushion. This is disclosed in Japanese Patent Publication No. 53-40522.

According to the known technical means described in the above-mentioned patent publication, even if a recorded recording medium disc made of a flexible thin film is rotated at high speed, no vibration or wave motion is generated on the recording surface. Since tracking control information for the reproducing element is also recorded in the recorded recording medium, reproduction of the information signal from the recorded recording medium can be performed satisfactorily under the tracking control operation.

However, in the known technical means described in the above-mentioned patent publication, it is necessary to attach or firmly fix the recorded recording medium disk made of a flexible thin film that is to be played back to the turntable one by one. but.

The recorded recording medium disks that are handled at that time have the drawback that they are difficult to handle because they are made of flexible thin films; Since it cannot be fixed on the turntable so that it is always in the correct mounting position, this known technique is used to record a recorded recording medium, such as a disc, on which tracking control information is also already recorded. There is a problem in that it is difficult to put it into practical use only in the case of a medium disk.

(Means for Solving the Problems) The present invention provides a thin film-like recording medium having a recording layer on its surface and having flexibility, and a thin film-like recording medium that is substantially similar to the above-mentioned thin film-like recording medium. The center part of the back surface of the above-mentioned thin film-like recording medium is connected to a supporting substrate having an outer shape of In addition to fixing the vicinity and the corresponding part of the surface of the support substrate, a ventilation means is provided near the center of the thin film-like recording medium so as to communicate with the gap between the Wt-like recording medium and the support substrate. A rotary recording medium consisting of a rotary recording medium, two thin film-like recording media having a recording layer on the surface and having flexibility, and a recording medium substantially similar to the above-mentioned thin film-like recording medium. It has a shape that maintains its surface flatness without deformation even during high-speed rotation, and
A support substrate having a ferromagnetic bonding portion in its center is connected to the center of the back surface of one of the two thin film recording media described above and The corresponding part of the front surface of the support substrate is fixed, and the vicinity of the center of the back surface of the other thin film recording medium of the two thin film recording media described above is fixed to the corresponding part of the back surface of the support substrate. A rotary recording medium in which a ventilation means is provided near the center of each of the above-mentioned thin-film-like recording media to communicate with the gap between the thin-film-like recording medium and the supporting substrate; □□□□0.6□ for the rotary type recording medium.

2□□ke The present invention provides a rotary recording medium which is made into a cartridge and is housed in a container provided with an affected area through which a means can pass.

(Example) Hereinafter, specific contents of the rotary recording medium of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of one embodiment of the rotary recording medium of the present invention, and in this FIG. A thin film-shaped recording medium B has an annular outer shape that is approximately the same as that of the thin film recording medium A, and the surface flatness is maintained without deformation even during high-speed rotation. This is a support substrate configured as such.

The recording medium A is formed by forming a recording layer 1r made of an appropriate recording material on the surface of a flexible thin film 1 made of synthetic resin with a thickness of, for example, several tens of microns. A center hole 2 is bored in the hole 2, and the outer shape is annular as a whole. Further, in the recording medium A shown in FIG. 1, ventilation holes 3, 3, . . . are provided near the center thereof.

When a ventilation hole 3 is provided near the center of the recording medium A in the first illustrated embodiment, the ventilation hole 3 to be provided near the center of the recording medium A is In practice, only one vent hole 3 may be provided, but it is a desirable embodiment that a plurality of vent holes 3 are provided symmetrically with respect to the center of the recording medium A.

When the recording medium A described above is configured as a magnetic recording medium, for example, a magnetic layer 1r made of cobalt-added gamma hematite or a thin film of a ferromagnetic alloy is formed on the surface of a thin film 1 made of polyester terephthalate resin. A material formed by adhering and forming by a well-known means may be used.

Furthermore, in practice, the recording layer 1r may be a perpendicular magnetization film for perpendicular magnetic recording, or alternatively.

The recording layer 1r is a magnetic thin film on which thermomagnetic recording such as so-called cue point temperature recording or guaranteed temperature recording is to be performed, for example, MnB1. MnCuB1. It may be constructed of a thin film of a substance such as GdCo, and thermomagnetic recording and reproduction may be performed using a rotating recording medium.

The recording layer 1r of the recording medium A described above undergoes a phase change from an amorphous state to a crystalline state, or a phase change from a crystalline state to an amorphous state, due to electromagnetic waves, electric fields, application of current, heating, etc. In the case where the recording layer is made of a material, the material used for forming the recording layer 1r is, for example, TeO.
x, or for example TeOx, 3n, Ge, etc. may be used.

The support substrate B has an outer shape that is approximately similar to the thin film recording medium A, and is configured so that the surface flatness is maintained without deformation even during high-speed rotation. For example, it is made of a non-magnetic plate such as an aluminum plate or a hard synthetic resin plate.

This supporting substrate B needs to be made with high rigidity so as not to be deformed even during high-speed rotation, but it goes without saying that it is desirable that it be thin. Also, even if the surface is such that the entire surface from the center to the periphery is included in the same plane,
Alternatively, it may be made into a surface equivalent to the curve of a right circular truncated cone with an extremely large apex angle, and there is no requirement for strict surface roughness for each surface, and the planar shape of the surface is not required. The size is preferably approximately the same as or larger than the thin film recording medium A described above.

In the support substrate B shown in the embodiment shown in the first figure, a coupling part 5 made of a ferromagnetic material is fitted and bonded to the center part of a main body part 4 made of a plate made of a non-magnetic material. However, in this way, the main body 4 is made of a plate made of a non-magnetic material.
In a rotary recording medium having a structure in which a coupling part 5 made of a ferromagnetic material is fitted and attached to the center part of the rotary recording medium, mechanical coupling operation and detachment between the rotary recording medium and its rotational drive part are performed. The operation is simple and easy between the permanent magnet provided in the rotation drive part and the ferromagnetic coupling part 5 on the support substrate B that is magnetically attracted to it. 6. □. Yo93. □□ This is a suitable configuration when the rotary recording medium is made into a cartridge by housing the whole in a container.

As described above, there is a thin film-like recording medium A that has the recording layer 1r on its surface and has flexibility, and a thin film-like recording medium A that has an outer shape that is approximately similar to the thin film-like recording medium A. The support substrate B, which is configured so that its surface flatness is maintained without deformation even during high-speed rotation, refers to the perforations of the ventilation holes 3, 3, . . . in the thin film recording medium A. The back surface closer to the inner circumference than the installation position and the corresponding portion of the support substrate B are fixed to each other and integrated as shown in the longitudinal cross-sectional side view of the second figure, thereby forming a rotary recording medium. It is done.

In FIG. 2, the part marked with a circle is partially enlarged to show the details of the fixed part between the thin film recording medium A and the support substrate B, and 6 indicates the part where the thin film recording medium A and the supporting substrate B are fixed. This is an adhesive layer used for fixing to the support substrate B, and the thickness of this adhesive layer 6 is, for example, 300 microns or less.

The embodiment illustrated in FIG. 2 is a thin film recording medium A.
and supporting substrate B are on the back surface 1 of the thin film recording medium A.
The supporting substrate B is annularly formed over a certain width of the innermost circumferential portion of b.
and 9 are glued together by a layer of adhesive 6.

As mentioned above, the ventilation holes 3, 3 in the thin film recording medium A
... and the center part closer to the inner circumference than the drilling position and the support board B
A rotary recording medium whose center portions that correspond to the center portions of After regulating the mounting position, the rotary recording medium is fixed to the rotary drive mechanism, and when the rotary drive mechanism rotates the rotary recording medium at a high speed of, for example, 1,000 revolutions per minute or more, a thin film-like recording medium A is formed. An air cushion formed by a thin layer of air is generated in the gap with the support substrate B, and the thin film recording medium A can be rotated at high speed with its surface flat.

That is, the ventilation holes 3.3- in the thin film recording medium A
A rotary recording medium configured in such a manner that the center portion of the support substrate B, which corresponds to the center portion closer to the inner periphery than the perforation position, is fixed. When they are rotated together at high speed by the rotation drive mechanism, the air existing in the gap between the thin film recording medium A and the support substrate B also causes the rotation of the thin film recording medium A and the support substrate B due to its viscosity. As a result, the air existing in the gap between the thin film recording medium A and the supporting substrate B is discharged to the outer periphery of the rotary recording medium by centrifugal force, and the thin film recording medium The air pressure in the gap between A and the support substrate B is lower than the air pressure outside the rotary recording medium,
As a result, air flows into the gap between the thin film recording medium A and the supporting substrate B through the ventilation holes 3°3... provided on the inner circumference of the thin film recording medium A, and the thin film Recording medium A
A thin layer of airflow with a uniform thickness is always formed in the gap between the support substrate B and the thin film recording medium A, and this acts as an air cushion against the thin film recording medium A. The thin film recording medium A can be rotated at high speed with its surface flat by suppressing vibrations and waves.

Incidentally, the ventilation hole 3 to be formed in the thin film recording medium A
In the case of a rotating recording medium with a diameter of 130 mm, the diameter is 2
Good results have been obtained with a diameter of ~3 mm. As mentioned above, the number of vent holes 3 to be formed in the thin film recording medium A may be one or more 6 In other words, the vent holes 3 are present in the gap between the thin film recording medium A and the supporting substrate B. Due to its viscosity, air rotates at high speed as the thin film recording medium A and supporting substrate B rotate. The air that has flowed into the gap with substrate B.

Because of its viscosity, it diffuses well into the gap between the thin film recording medium A and the support substrate B, so even if there is only one ventilation hole 3, a good air cushion is formed over the entire surface of the rotary recording medium. However, providing a plurality of ventilation holes 3, 3, etc. at symmetrical positions with respect to the center of the rotary recording medium means that the holes 3, 3, etc. are provided in the gap between the thin film recording medium A and the supporting substrate B. MttsaK′″gut°6kM**ft of similar airflow
1U11aaTto.

This has been confirmed as a result of experiments.

FIG. 3 shows that the center portions of the thin film recording medium A and the center portions of the supporting substrate B, which correspond to each other, are fixed to each other, and the thin film recording medium A is fixed in the vicinity of the fixed portion.
This shows an embodiment of a rotary recording medium configured by forming ventilation holes 8° 8... in the support substrate B in the portion facing into the gap between the support substrate B and the support substrate B, and also includes: Fig. 4 shows that one or more ventilation holes 3, 3... are provided in a film-like recording medium A at symmetrical positions with respect to the center of the rotary recording medium, and a thin film-like recording medium A is provided with one or more ventilation holes 3, 3... ventilation hole 3
．． This is an embodiment in which an annular groove 8 is provided in a portion of the surface of the support substrate B facing the positions 3..., and FIG. FIG. 4(b) is a longitudinal sectional side view of the vicinity of the center of the rotary recording medium. In addition,
In the embodiment shown in FIG. 4, as is clear from the part (b) of FIG. It is being done. That is, in the embodiment shown in FIG. 4, the back surface 1b of the thin film recording medium A and the front surface of the support substrate B are brought into close contact, and an annular holding plate 9 is placed at the center of the thin film recording medium A. By screwing a plurality of screws 10 and 10 into the support substrate B from the annular holding plate 9, the thin film recording medium A and the support substrate B are fixed.

Any means may be used for fixing the thin film recording medium A and the supporting substrate B at the center thereof, and
Even if the thin film recording medium A and the support substrate B are in close contact with each other at the fixed portion, or in a manner that intentionally creates a gap of, for example, 300 microns or less between the two, The fixing may be performed.

FIG. 5 shows a portion of the support substrate B that corresponds to the fixed portion at the center of the film-like recording medium A and the support substrate B.
A plurality of protrusions ti, u, it... are provided protrudingly.

By fixing the upper surface portions of the projections 11, 11, 11, . A gap with a size corresponding to the height of the protrusions 11 described above is formed, and each of the protrusions 11 described above is
, 11, 11...
, 12, 12... function as a ventilation hole to be provided between the gap between the thin film recording medium A and the support substrate B and the outside atmosphere. <a> in FIG. 5 is a perspective view of the vicinity of the center of the support substrate B, and FIG. It is a vertical cross-sectional side view showing a state in which projections H, 11, 11, . Note that when adhesive bonding means is used as the means for fixing the thin film recording medium A and the support substrate B, the protrusions 1
The height of the protrusion 11 is adjusted such that the sum of the height of the projection 11 and the thickness of the adhesive layer corresponds to the gap size to be formed between the surface of the support substrate B and the back surface 1b of the thin film recording medium A. Needless to say, the quality should be selected.

FIG. 6 shows a plurality of protrusions 13a, 13a, . The back side of the annular double-sided adhesive tape is attached, and the protrusions 13a, 1 on the double-sided adhesive tape 13 are attached.
From this, the thin film recording medium A and the supporting substrate B are fixedly attached in such a manner that the back surface of the thin film recording medium A is attached to a part of the surface of the thin film recording medium A.

A gap with a size corresponding to the height of the protrusion 13 of the double-sided adhesive tape 13 described above is formed between the surface of the support substrate B and the back surface 1b of the thin film recording medium A, and each of the above-mentioned Among the spaces 13b, 13b, . . . formed between the protrusions 13a, 13a, .
This shows an embodiment that functions as a ventilation hole that should be provided between the gap between the thin film recording medium A and the supporting substrate B and the outside atmosphere. a)
6 is a perspective view of the double-sided adhesive tape 13, and FIG. 6(b) is a perspective view of the double-sided adhesive tape 13 with the support substrate B attached to the thin film-like recording medium near the center of the support substrate B.
1, al; L:, j66o. . . , 3. □、□□
2 is a perspective view of a rotary recording medium configured by fixing a support substrate B to a support substrate B with a front adhesive tape 13 attached to the vicinity of the center of the support substrate B. FIG.

Each of the embodiments described so far has been a rotary recording medium having a configuration in which the center portion of the thin film recording medium A is fixed to only one side of the support substrate B. This figure shows an embodiment of a rotary recording medium in which the center portions of separate thin film recording media Aa and Ab are fixed to both sides of B, that is, a shoulder surface type rotary recording medium.

7th Wi, (a) is a longitudinal sectional side view of a double-sided type rotary recording medium constructed using a flat plate type support substrate B whose front and back surfaces are parallel.

FIG. 7(b) shows a double-sided rotary recording medium constructed using a supporting substrate B having a configuration in which both the front and back sides are the curves of a right circular truncated cone with extremely large apex angles. FIG.

This 7th v! In the double-sided rotary recording medium shown in FIG. 1, the thin film recording medium A and the support substrate B, which are already described with reference to FIG. Although the same fixing means as the fixing means for fixing the supporting substrate B is used, the fixing means for fixing the thin film recording media AI, A2 and the supporting substrate B are as shown in FIGS. 3 to 6 WI.
It goes without saying that a fixing means similar to the fixing means for fixing the thin film recording medium A and the support substrate B described above with respect to each of the figures may be applied.

In FIGS. 7(a) and (b), 18 is a flexible thin film in the thin film recording medium Aa, lar is the recording layer in the thin film recording medium Aa, and jab is the back surface of the thin film recording medium Aa. , 3a is a ventilation hole, and
lb is a flexible thin film in the thin film recording medium Ab, lbr is a recording layer in the thin film recording medium Ab,
lbb is the back surface of the thin film recording medium Ab, 3b is a ventilation hole, and 6 is an adhesive layer.

When a double-sided rotary recording medium is mounted on a rotation drive mechanism and rotated at high speed, the air and support in the gap between the support substrate B and the thin film recording medium Aa in the double-sided rotary recording medium are removed. The air in the gap between the substrate B and the thin film recording medium Ab is discharged by centrifugal force as described above with reference to FIGS. 1 and 2, but air holes are provided in the gap. Since air is supplied from the external space through the gap between the support substrate B and the thin film recording medium Aa in the double-sided rotary recording medium, and the gap between the support substrate B and the thin film recording medium Ab in the double-sided rotary recording medium. Air is continuously supplied inside, and the thin film recording medium Aa and the thin film recording medium Ab are vibrated by the action of an air cushion created by a thin air flow in the gap between each of them and the support substrate B. It is possible to rotate at high speed while maintaining a good surface condition without causing vibrations or waves.

FIG. 8 shows how the rotary recording medium and the rotary drive mechanism are coupled, for example, as shown in FIG. It is preferably used when the rotary recording medium is surrounded by a mechanism, and only one side of the rotating recording medium within the surrounding area is in communication with the atmosphere. FIG. 8(a) is a perspective view of the center of the support substrate B, and FIG. 8(b) is a configuration example of a double-sided rotary recording medium. FIG.

In (a) and (b) of Figure 8, 14, 14.14-
. . . is a through hole drilled in the support substrate B, and the other components are the same as the configuration described with reference to FIG. 5, and 11.11 . . . It is a plurality of protrusions.

In FIG. 8(c), reference numeral 15 denotes a rotation shaft of a rotation drive mechanism that drives and rotates a double-sided type rotary recording medium.

17 is an engagement support portion that engages with the center hole of a double-sided rotary recording medium; 16 is a lower support portion that supports the double-sided rotary recording medium from below; and 18 is the aforementioned engagement support portion 1.
7, a lower support part 16, and the lower surface of the center of the double-sided rotary recording medium, and 19 is a space surrounded by the lower surface of the center of the double-sided rotary recording medium. This clamper 19 is configured such that, for example, a screw 20 is screwed into the base support part 17 to ensure that the double-sided rotary recording medium is rotated by the rotation drive mechanism together with the lower support part 16 described above. is fixed to. 22 is a space surrounded by the above-mentioned damper 19 and the upper surface of the center of the double-sided rotary recording medium; 21 is a vent hole formed in the damper 19; The above-mentioned space 21 and space 18 communicate with each other through through holes 14, 14 formed in the support substrate B.

A double-sided rotary recording medium having the configuration shown in FIG. 8(b) is brought into a state as shown in FIG. 8(c) with respect to a one-rotation drive mechanism. When mounted and driven and rotated at high speed, air in the gap between the support substrate B and the thin film recording medium Aa and in the gap between the support substrate B and the thin film recording medium Ab in a single-sided rotary recording medium. The air is discharged by centrifugal force as described above with reference to FIGS.
Since air is supplied from the external space through the ventilation hole 21 formed in the clamper 19,
) is a closed type configuration as shown in the rotation F! ! Even when a double-sided rotary recording medium is driven and rotated by a motion mechanism, the space between the supporting substrate B and the thin film recording medium Aa in the single-sided rotary recording medium and the support substrate B Air is continuously supplied from the above-mentioned space 22.18 into the gap between the thin film recording medium Aa and the thin film recording medium Ab. Due to the effect of the air cushion created by the low airflow in the gap between the support substrate B and the support substrate B, it is possible to rotate at high speed while maintaining a good surface condition without generating vibrations or waves. Note that the ventilation hole 21 to be bored in the clamper 19 described above,
21 may have a three-dimensional shape so that a large amount of air can be blown into the space 22 when the clamper 19 rotates at high speed.

FIG. 9 shows an example of a configuration in which the rotary recording medium configured as described above is housed in a container and the rotary recording medium is made into a cartridge. Reference numeral 23 denotes a container for storing a rotary recording medium therein, and a molded product made of synthetic resin, for example, is used as the container 23.

Reference numeral 24 designates a window portion into which a connecting portion of a rotary drive mechanism for rotationally driving the rotary recording medium stored in the container 23 is inserted, and 26 is a window portion that is stored in the container 23. This is an affected area provided on the side wall of the container 23 for inserting the recording/reproducing means into the recording surface of the rotary recording medium, and 25 is for automatically closing the affected area 26 when the cartridge C is not in use. This is a shirt board. If the rotary recording medium stored in the container 23 is a double-sided rotary recording medium, the affected areas 24 and 26 should be provided on the side walls of both the front and back sides of the container 23. Needless to say.

FIGS. 1θ to 12 show an example in which the rotary recording medium of the present invention, which is made into a cartridge by being stored in a container 23, is implemented as a magnetic recording medium.
3 is a diagram illustrating and explaining the operation of recording an information signal on a rotary recording medium and the operation of reproducing an information signal from the rotary recording medium, and in each case, C indicates that the rotary recording medium is stored in a container 23; Md is a rotational drive motor 1, l'ff is a transfer motor, and D is a transfer mechanism.

FIG. 10 shows a cartridge C in which a rotary recording medium, such as a flexible thin film recording medium provided only on one side of a support substrate B, is housed in a container 23.
11 and 12 are explanatory diagrams of recording and reproducing operations in a magnetic recording and reproducing device when a supporting substrate B is used.
Magnetic recording and reproduction when a cartridge C is used in which a rotary recording medium, such as a rotary recording medium having flexible thin film recording media provided on both sides thereof, is housed in a container 23. FIG. 3 is an explanatory diagram of a recording/reproducing operation in the apparatus.

The magnetic recording/reproducing device shown in FIG.
In the magnetic recording/reproducing device shown in the figure, only - recording/reproducing elements are provided, and by turning the cartridge C over, the - recording/reproducing elements can provide information on - both sides of the rotary recording medium. This is an example in which a signal recording operation and an information signal reproducing operation from both sides of a rotary recording medium are performed.

In each of the above-mentioned times, 27 is the rotating shaft 1 of the rotational drive mechanism.
5, the permanent magnet fixed to the cartridge C
When the container 23 of the cartridge C is installed in the magnetic recording/reproducing device as required, the container 23 of the cartridge C is fixed in the device by a locking mechanism (not shown), and the window provided in the container #I23 of the cartridge C is fixed in the device. The permanent magnet 27 fixed to the rotating shaft 15 of the rotary drive I/lk structure inserted from the part 24 and the coupling part 5 made of ferromagnetic material in the rotary recording medium are magnetically attracted to each other, and the rotary type The recording medium is rotated at high speed at a predetermined number of rotations by a rotation drive mechanism.

On the other hand, the magnetic head 28 is driven and displaced by the driving rotation of the transport motor Mf in the transport mechanism.

The cartridge C is brought into good contact with the surface of the recording layer of the rotary recording medium through the window 26 to perform recording and reproducing operations of information signals.

In addition, in the illustrated example, the transfer mechanism is a transfer motor l.
lf, a deceleration mechanism 29, a feed screw 3o, a guide rod (not shown), and a transfer body 31 that meshes with the feed screw 3o and is guided by the guide rod. The magnetic head 28 is provided via a cantilever 33 to the actuator 32 fixed to the transfer body 31, and the magnetic head 28 performs recording and reproducing operations in a good tracking state under the control of a control circuit (not shown). can be done.

(Effects) As is clear from the above detailed explanation, the present invention provides a thin film-like recording medium having a recording layer on its surface and having flexibility, and a thin film-like recording medium having flexibility. The above-mentioned thin film recording medium includes a support substrate that has an outer shape that is approximately similar to the medium and is configured so that the surface flatness is maintained without deformation even during high-speed rotation. The vicinity of the center of the back surface of the above-mentioned support substrate is fixed to the corresponding part of the front surface of the supporting substrate, and the vicinity of the center of the above-mentioned thin-film recording medium is connected to the gap between the thin-film recording medium and the support substrate. A rotary recording medium provided with a ventilation means, a thin film-like recording medium having a recording layer on its surface and having flexibility, and a recording medium almost similar to the above-mentioned Wi film-like recording medium. It has an external shape that maintains its surface flatness without deformation even during high-speed rotation, and a ferromagnetic coupling part is provided in the center. A supporting substrate such as the one shown in FIG. A rotary recording medium structure is provided with a ventilation means that communicates with a gap between a thin film recording medium and a supporting substrate.
In addition to providing a window portion on the side wall through which the driving means for the rotary recording medium structure can pass, the thin film-like recording material described above is provided.
A rotary recording medium formed into a cartridge by being housed in a container in which a part of the side wall facing the recording layer of the medium is provided with a window through which a recording/reproducing means can pass, and a rotary recording medium having a recording layer on one surface thereof. It has two thin film-like recording media that are structured and have flexibility, and has an outer shape that is almost similar to the above-mentioned thin film-like recording media, and does not deform even during high-speed rotation. The above-mentioned two thin film-like supporting substrates are constructed such that the flatness of the surface is maintained without any problem, and a ferromagnetic bonding portion is provided in the center of the support substrate. The vicinity of the center of the back surface of one of the thin film-like recording media in the recording medium is attached to the corresponding part of the front surface of the supporting substrate, and the other thin film-like recording medium of the two thin film-like recording media is The vicinity of the center of the back surface of the recording medium and the corresponding portion of the back surface of the supporting substrate are fixed together, and further, a gap between the thin film recording medium and the supporting substrate is formed near the center of each of the thin film recording media described above. A rotary recording medium provided with a ventilation means that communicates with Medium and roughly @JX (1) lLlf'jgtt'lf°
19.1&*rytfii, n<%**.

The above-mentioned two thin films are connected to a supporting substrate which is constructed so that the surface flatness is maintained without causing any The vicinity of the center of the back surface of one thin film recording medium in the two thin film recording media is fixed to the corresponding part of the surface of the supporting substrate, and the other thin film recording medium in the two thin film recording media The vicinity of the center of the back surface of the recording medium and the corresponding portion of the back surface of the supporting substrate are fixed together, and further, the area between the thin film recording medium and the supporting substrate is fixed to the vicinity of the center of each of the thin film recording media. A rotary recording medium structure is constructed by providing ventilation means that communicates with the gap, and a window portion is provided on the side wall through which a driving means for the rotary recording medium structure can pass, and the recording layer in the thin film recording medium described above is provided. A rotary recording medium of the present invention is a rotary recording medium formed into a cartridge by being housed in a container having a window portion through which a recording/reproducing means can pass through a part of the side wall facing the rotary recording medium. Since the flexible thin film recording medium is integrally constructed with the support substrate, it is extremely easy to handle compared to a rotating recording medium consisting of only a thin film recording medium. ,
A flexible thin film recording medium can always be rotated at high speed in a stable rotation state by the air cushion on the support substrate, and dust on the support substrate can be easily rotated between the support substrate and the flexible substrate. It is automatically discharged by the airflow of the thin film-like recording medium, which has a
By housing a flexible thin-film recording medium and a support substrate, which are fixed and integrated at their corresponding centers, in a container to form a cartridge, Furthermore, if flexible thin-film recording media are provided on both sides of the support substrate, the recording capacity can be doubled, and the recording medium can be easily handled from both sides of the support substrate. It is possible to obtain an easy-to-handle rotary recording medium on which recording and reproducing operations can be performed simultaneously or sequentially.

Note that in the case where the rotary recording medium of the present invention is configured to be housed in a container, recording and reproduction on the rotary recording medium is performed as a cartridge in which the single rotary recording medium is housed in the container. Even if the storage container containing the rotational recording medium is installed in the recording/playback device, only the rotational recording medium in the storage container is automatically removed from the storage container. The rotary recording medium may be coupled to a rotational drive mechanism in a recording/reproducing apparatus to perform recording/reproducing on a rotating recording medium.

[Brief explanation of drawings]

1 to 8 are explanatory diagrams of different embodiments of the rotary recording medium of the present invention, FIG. 9 is a perspective view of the rotary recording medium in the form of a cartridge, and FIG. 10 to 12 are magnetic recording FIG. 3 is an explanatory diagram of the recording and reproducing operation of the reproducing device. A, Aa, Ab... Flexible thin film recording medium, B... Support substrate, C... Cartridge, D...
Transfer mechanism, 1. la, lb...thin film having flexibility,
1 r, 1 ar, 1 br - recording layer, lb, lab
, 1bb-back side, 2...center hole, 3.3 at 3
b. 8,21"" vent. 4...Main part, 5...Coupling part made of ferromagnetic material, 6
... adhesive layer, 8 ... annular groove, 9 ... annular holding plate, 10 ... screw, 11, 13a ... protrusion, 1
3...Double-sided adhesive tape, 14...Through hole, 15...
Rotating shaft, 16... Lower support part, 17... Engagement support part, 18.22... Space part, 23... Container, 24.2
6...Window part, 25...Shutter plate, 27...Permanent magnet, 28...Magnetic head, 29...Deceleration mechanism, 3
0...Feed screw, Atsushi 12 Figure

Claims (1)

[Scope of Claims] 1. A thin film-like recording medium having a recording layer on its surface and having flexibility, and having an outer shape substantially similar to the above-mentioned thin film-like recording medium. The support substrate is configured such that the surface flatness is maintained without deformation even during high-speed rotation, and the support substrate is located near the center of the back surface of the thin film recording medium and the support substrate. A rotary recording medium 2, in which a corresponding portion of the surface of the thin film recording medium is fixed, and a ventilation means is provided near the center of the thin film recording medium so as to communicate with the gap between the thin film recording medium and the supporting substrate. , a rotary recording medium 3 according to claim 1, wherein the recording layer of the thin film recording medium is made of a magnetic material; The rotary mold according to claim 1, which is made of a material that causes a phase change from an amorphous state to a crystalline state or a phase change from a crystalline state to an amorphous state by heating or the like. The recording medium 4 is a thin film-like recording medium having a recording layer on its surface and having flexibility, and has an external shape approximately similar to the above-mentioned thin film-like recording medium, and has a high-speed recording medium. The above-mentioned support substrate is constructed such that its surface flatness is maintained without deformation even when rotated, and a ferromagnetic coupling portion is provided in the center of the support substrate. The vicinity of the center of the back surface of the thin film recording medium and the corresponding part of the front surface of the supporting substrate are fixed together, and the area between the thin film recording medium and the supporting substrate is fixed to the vicinity of the center of the thin film recording medium. A rotary recording medium structure is constructed by providing ventilation means that communicates with the gap, and a window portion is provided on the side wall through which a driving means for the rotary recording medium structure can pass, and the recording layer in the thin film recording medium described above is provided. A rotary recording medium 5 formed into a cartridge by being housed in a container having a window portion through which a recording/reproducing means can pass through a part of the side wall facing the rotary recording medium 5, in which the recording layer of the thin film recording medium is magnetic. The recording layer of the rotary recording medium 6 according to claim 4, which is made of a thin film recording medium, is changed from an amorphous state to a crystalline state by electromagnetic waves, electric fields, application of current, heating, etc. The rotary recording medium 7 according to claim 4 is made of a material that causes a phase change from a crystalline state to an amorphous state, or from a crystalline state to an amorphous state, and a recording layer is formed on the surface of the rotary recording medium 7. It has two thin film-like recording media that are flexible and have a similar external shape to the above-mentioned thin film-like recording media, and the surface does not deform even during high-speed rotation. The above-mentioned two thin-film recording media are connected to a support substrate which is configured such that the flatness of the recording medium is maintained and a ferromagnetic bonding portion is provided at the center of the support substrate. The vicinity of the center of the back surface of one of the thin film recording media is fixed to the corresponding part of the surface of the support substrate, and the other thin film recording medium of the two thin film recording media described above is fixed. The vicinity of the center of the back surface and the corresponding portion of the rear surface of the supporting substrate are fixed together, and the vicinity of the center of each of the thin film recording media described above is connected to the gap between the thin film recording medium and the support substrate. A rotary recording medium 8 provided with a ventilation means, a rotary recording medium 9 according to claim 7, wherein the recording layer of the thin film recording medium is made of a magnetic material, and a thin film recording medium. The recording layer is made of a material that undergoes a phase change from an amorphous state to a crystalline state, or from a crystalline state to an amorphous state, due to electromagnetic waves, electric fields, application of current, heating, etc. A rotary recording medium 10 according to claim 7, two thin film-like recording media having a recording layer on the surface and having flexibility, and the thin film-like recording medium. It has an external shape that is almost similar to that of the medium, and is constructed so that the surface flatness is maintained without deformation even during high-speed rotation. A support substrate provided with a bonding portion is fixed to the vicinity of the center of the back surface of one of the two thin film recording media described above and the corresponding portion of the surface of the support substrate. In addition, the vicinity of the center of the back surface of the other thin film recording medium of the two thin film recording media described above is fixed to the corresponding part of the back surface of the support substrate, and further, each of the thin film recording media described above is A rotary recording medium structure is constructed by providing a ventilation means that communicates with the gap between the thin film recording medium and the support substrate near the center of the recording medium, and a driving means for the rotary recording medium structure is passed through the side wall. The cartridge is housed in a container that is provided with a window that allows the recording layer to pass through, and a window that allows the recording and reproducing means to pass through a part of the side wall facing the recording layer of the thin film recording medium described above. A rotary recording medium 11 according to claim 10, wherein the recording layer of the thin film recording medium is made of a magnetic material, a rotary recording medium 12 according to claim 10, wherein the recording layer of the thin film recording medium is Claims that are made of a material that undergoes a phase change from an amorphous state to a crystalline state, or from a crystalline state to an amorphous state, due to electromagnetic waves, electric fields, application of current, heating, etc. Rotary recording medium according to item 10