JP2000090490A - Protective edge and edge cover for disk recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability without requiring immediate housing of a disk recording medium into a protective case when this medium is not used by integrally forming a projecting part which projects to an annular form in a direction orthogonal with a recording surface at an edge part and preventing the recording surface from coming into contact with a desk surface and a floor surface. SOLUTION: The protective edge of the disk recording medium 10 is obtd. by integrally forming the projecting part 10b which projects to the annular form in the orthogonal direction from the recording surface 10a at the edge part 10d of the disk recording medium 10. The height at which the projecting part 10b projects in the orthogonal direction from the recording surface 10a is specified to 0.5 mm and the width in the radial direction to 1 to 2 mm to avoid hindering the recording and reproducing of the disk recording medium 10. When the disk recording medium 10 is placed on the desk surface or floor surface, the projecting part 10b is abutted on the desk surface or floor surface, the recording surface 10a parts form the desk surface or floor surface and, therefore, even if there are dust, etc., on the desk surface or floor surface, the adhesion of the dust, etc., on the recording surface 10a and the consequent flawing thereof are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective edge and an edge cover for a disk recording medium such as a CD (compact disk), DVD, CD-ROM and LD (laser disk).

[0002]

2. Description of the Related Art Conventional CD, DVD, CD-ROM, L
A disk recording medium such as D is formed from a synthetic resin (plastic) into a completely flat disk from the center to the edge, and a recording surface is provided on the flat surface. When such a disk recording medium is placed horizontally on a desk or floor, its recording surface comes into contact with the desk or floor.

[0003]

SUMMARY OF THE INVENTION CD, DVD and CD-
Among the damages to disk recording media such as ROMs and LDs, the most common occurrence is when the disk recording medium is placed horizontally on a desk or floor, and the recording surface is on the desk or floor. Abrasion caused by contact with dust and the like adhered to the surface. Then, when the use of the disk recording medium is finished,
In order to prevent the recording surface from being damaged, the disk recording medium D is placed in a protective case C as shown in FIG. The protective case C is made of plastic and is formed of a storage portion 1 for a disk recording medium D and a lid 2. The storage portion 1 has a concave surface 1 on which the disk recording medium D is stored.
In the center of the concave surface 1a, there is formed a fitting projection 1b into which a center hole d of the disk recording medium D is elastically fitted. One end 2 a of the lid 2 is rotatably attached to one end 1 c of the storage unit 1 by a support shaft 3. The lid 2 is made of a transparent synthetic resin, so that the disk recording medium D can be seen through.
An engaging recess 1d is formed on the outer surface of the other end of the storage portion 1, and the engaging recess 1d is formed on the inner surface of the other end of the lid 2.
Is formed. When the disk recording medium has been used, it is troublesome to immediately put the disk recording medium in the protective case C as described above, and often the disk recording medium D tends to be left on a desk surface or a floor surface. Then, there is a possibility that the recording surface of the disk recording medium may be damaged. The present invention relates to, for example, a CD
When a disk recording medium such as a DVD, a CD-ROM, an LD, or the like is placed horizontally on a desk or floor, the recording surface of the disk recording medium does not come into contact with the desk or floor. To provide a protective edge and an edge cover for the disk recording medium so that the recording surface of the disk recording medium does not come into contact with the dust and is not scratched even when dust adheres to the floor or the floor surface. It is intended.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a disk recording medium having an edge portion 10d having a ring-like projection projecting from the recording surfaces 10a, 10a in a direction perpendicular to the recording surface 10a. The portions 10b, 10b are used as protective edges of the integrally formed disk recording medium. By using such a protective edge of the disk recording medium, when the disk recording medium 10 is placed horizontally on a desk or floor, the projections 10b, 10b abut on the desk or floor, Since the surfaces 10a, 10a do not contact the desk surface or the floor surface, even if dust is attached to the desk surface or the floor surface, the recording surfaces 10a, 10a do not contact the dust, so that the recording surfaces 10a, 10a Does not hurt. Therefore, when the disk recording medium 10 is not used, it is not necessary to immediately put the disk recording medium 10 in a conventional general protective case.

In the invention according to claim 2, a projection 10b projecting in a ring shape in a direction perpendicular to the recording surface 10a is formed integrally with an edge 10d of the disk recording medium 10, and the projection 10b Inner circumference and recording surface 10a,
10a, the recording surface 1 of the disk recording medium 10
Grooves 10a which are held so that the edge portions of the transparent films 12 and 12 covered with the first and second films 10a and 10a are fitted and not peeled off.
e and 10e are formed as protection edges of the disk recording medium. As described above, since the recording surfaces 10a, 10a are covered with the transparent films 12, 12, even if the transparent films 12, 12 come into contact with dust adhering to a desk surface or a floor surface, the recording surfaces 10a, 1
0a is not damaged.

According to a third aspect of the present invention, an intermittent projection 10b 'is formed integrally with the edge 10d of the disk recording medium 10 in a direction perpendicular to the recording surface, and the inner side of the projection 10b'. At the connecting portion between the recording surface 10a and
A groove 10e 'is formed in which the edges of the transparent films 12, 12 coated on the recording surfaces 10a, 10a of the disk recording medium 10 are fitted and held so as not to be peeled off. It is an edge. Thus, the recording surface 10 of the disk recording medium 10 is
By covering the transparent films 12 and 12 on the layers a and 10a, the same operation as that of the invention according to claim 2 can be obtained.

Further, according to the present invention, the recording surfaces 10a, 10a are provided on the edge 10d of the disk recording medium 10 '.
This is a protection edge of a disk recording medium characterized by joining separately formed projections 10b "and 10b" which protrude in a ring shape in a direction orthogonal to a. By using the protective edge of such a disk recording medium, even in the conventional disk recording medium 10 'having no protective edge, the ring-shaped protrusion 10
b "and 10b" can be easily formed by bonding. Then, the edge portion 10d of the disk recording medium 10 '
By providing separate ring-shaped projections 10b ", 10b", the same operation as the invention according to claim 1 can be obtained.

Further, according to a fifth aspect of the present invention, the recording surfaces 10a, 10a are provided on the edge 10d of the disk recording medium 10 '.
The protrusions 10b ", 10b" formed separately and projecting in a ring shape in a direction perpendicular to the direction a are joined, and the inner circumferences of the protrusions 10b ", 10b" and the recording surfaces 10a, 10a are joined.
Characterized in that gaps 10f, 10f are provided between the recording surfaces 10a, 10a so that the edges of the transparent films 12, 12 covering the recording surfaces 10a, 10a are fitted and held so as not to be peeled off. It is a protection edge. Thus, the recording surface 10 of the disk recording medium 10 'is
When the transparent films 12 and 12 are coated with the transparent films 12 and 12, the recording surfaces 10a and 10a are not damaged even if the transparent films 12 and 12 come into contact with dust adhering to a desk surface or a floor surface. The operation is the same as that of the invention according to the second and third aspects.

Further, according to the present invention, the recording surfaces 10a, 10a are formed on the edge 10d of the disk recording medium 10 '.
And a resilient projection 11 which protrudes in a ring shape in a direction perpendicular to the direction from the bottom surface to be detachable. By using such a protective edge of the disk recording medium, even in the conventional disk recording medium 10 'having no protective edge, the elastic projection 11 can be easily attached to the edge 10d. The elastic projection 1 is provided on the edge 10d of the disk recording medium 10 '.
By providing 1, the same operation as the first and fourth aspects of the invention can be obtained.

[0010] The invention according to claim 7 is the invention that a transparent film 1 is provided on the recording surfaces 10a, 10a of the disk recording medium 10 '.
2 and 12 and the transparent films 12 and 1
A disk characterized in that a resilient projection 11 projecting in a ring shape from the recording surfaces 10a, 10a in a direction perpendicular to the recording surfaces 10a, 10a is detachably provided at an edge portion of the recording medium 10 'and an edge portion 10d of the disk recording medium 10'. This is a protection edge of the recording medium. As described above, the transparent film 12, the transparent film 12, the recording surface 10a of the disk recording medium 10 '
When the disk recording medium 10 'is placed horizontally on a desk or floor to which dust adheres, the transparent films 12 and 12 are exposed to dust or dust adhering to the desk or floor when the disk recording medium 10' is placed on the desk or floor. Even if they touch, the recording surfaces 10a, 10a will not be damaged.

The invention according to claim 8 relates to a disk recording medium in which a plurality of arcuate covers 13a, 13a 'covering an edge 10d of a disk recording medium 10' are connected to form a ring-shaped cover. Edge 10 of medium 10 '
This is an edge cover of a disk recording medium that is configured to cover d. By using such an edge cover for the disk recording medium, the edge portion 10 of the conventional disk recording medium 10 'having no protective edge can be formed.
The arc-shaped covers 13a and 13a 'divided into a plurality of pieces d can be easily fitted to form a ring-shaped cover by fitting. The disk recording medium 1 described in each claim
0 'is the same as a conventional general disk recording medium.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the protection edge of a disk recording medium according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a disk recording medium according to an embodiment of the present invention, in which the recording surfaces 10a and 10a are formed on the disk recording medium 10 in the same manner as in the prior art. The present invention
The recording surface 10 is provided on the edge 10d of the disk recording medium 10.
The projections 10b, 10b projecting in a ring shape in a direction perpendicular to the projections 10a, 10a serve as protection edges of a disk recording medium integrally formed. In addition, this protrusion 10b
The height, width, operation, and the like will be described later. When the disk recording medium 10 having such a protective edge is placed horizontally on a desk or a floor, the protrusions 10b, 10b abut on the desk or floor, and the recording surfaces 10a, 10a are placed on the desk or floor. Since it is separated from the floor surface, even if dust or the like adheres to the desk surface or the floor surface, it does not come into contact with the recording surfaces 10a, 10a and damage the recording surfaces 10a, 10a. Reference numeral 10c shown in FIG. 1 is a center hole to be fitted to a spindle (not shown) of a turntable of the disk recording medium drive.

As shown in FIG. 2, according to an embodiment of the present invention, as shown in FIG. 2, a protrusion protruding from an edge 10d of a disk recording medium 10 in a direction perpendicular to the recording surfaces 10a, 10a in a ring shape. 10b, 10b are integrally formed, and the inner circumference of the projections 10b, 10b and the recording surface 1 are formed.
The grooves 10e, which are held so that the edges of the transparent films 12, 12 made of synthetic resin covering the recording surfaces 10a, 10a of the disk recording medium 10 are fitted so as not to be peeled off at the joints with the recording media 10a, 10a. 10e is formed as a protective edge of a disk recording medium characterized by being formed.
The inner circumferences of the projections 10b, 10b and the recording surfaces 10a, 10
Means for forming the concave grooves 10e, 10e in the connecting portion with a, and means for fitting the edge portions of the transparent films 12, 12 into the concave grooves 10e, 10e are not specifically described, but are so-called. A person skilled in the art can think of various means. The means for coating the transparent films 12, 12 on the recording surfaces 10 a, 10 a of the disk recording medium 10 is such that the transparent films 12, 12 are coated on the recording surfaces 10 a, 10 a.
The coating can be performed without the use of an adhesive just by abutting on a. As described above, by covering the recording surfaces 10a, 10a of the disk recording medium 10 with the transparent films 12, 12, if the disk recording medium 10 is temporarily placed on a desk surface or a floor surface to which dust is attached, the transparent surface is formed. Film 12,
12, even if the recording surface 10a, 1
0a is not damaged.

Further, according to the embodiment of the present invention, as shown in the oblique view shown in FIG. 3A and the sectional view shown in FIG.
In addition, intermittent projections 10b ', 10b' are integrally formed in a direction perpendicular to the recording surfaces 10a, 10a, and the inside of the projections 10b ', 10b' and the recording surfaces 10a, 1b are formed.
0a, the recording surface 10 of the disk recording medium 10
a, 10a, a concave groove 10 in which the edge portions of the transparent films 12, 12 are fitted and held so as not to be peeled off.
e '(the other groove 10e' is not shown) is formed as a protective edge of the disk recording medium. Thus, the disk recording medium 10
By covering the recording surfaces 10a, 10a with transparent films 12, 12, if the disk recording medium is placed on a desk surface or a floor surface to which dust is attached, the transparent film 1
Even if the recording media 2 and 12 contact the dust, the recording surface 10
The point that a and 10a are not damaged is the same as in the case of the invention according to claim 2.

In the embodiment of the present invention according to claim 4, as shown in FIG. 4, a ring-shaped projection is formed on the edge 10d of the disk recording medium 10 'in a direction perpendicular to the recording surfaces 10a, 10a. Separately formed projection 10b ″,
10b "is a protective edge of the disk recording medium, which is characterized in that the projection 10b" formed separately is a metal ring or a ring made of synthetic resin. Can be. The protective edge of such a disk recording medium can be easily formed by bonding the ring-shaped projections 10b "and 10b" to the edge 10d even in the conventional disk recording medium 10 'having no protective edge. it can. When the disk recording medium 10 'having such a protective edge is placed horizontally on a desk or floor, the projections 10b "and 10b" come into contact with the desk or floor, and the recording surface 10a , 10a are separated from the desk surface or the floor surface. Even if dust or the like adheres to the desk surface or the floor surface, they do not come into contact with the recording surfaces 10a, 10a, so that the recording surfaces 10a, 10a are damaged. This is the same as in the first aspect of the present invention.

In the embodiment according to the fifth aspect of the present invention, as shown in FIG. 5, a ring-shaped projection is formed on the edge 10d of the disk recording medium 10 'in a direction perpendicular to the recording surfaces 10a, 10a. Separately formed projection 10b ″,
10b "and the projections 10b", 10b.
A gap 10f between the inner circumference of b ″ and the recording surfaces 10a, 10a, in which the edges of the transparent films 12, 12, which cover the recording surfaces 10a, 10a of the disk recording medium, are fitted and held so as not to be separated. , 10f are provided as protective edges of the disk recording medium, and the transparent films 12, 12 whose outer diameters are smaller than the outer diameter of the disk recording medium are used as the recording surfaces 10a, 10f. 10
a, the edges of the transparent films 12 and 12 correspond to the protrusions 10b "and 10b" and the recording surface 10b.
The projections 10b "and 10b" are joined to the edge 10d of the disk recording medium 10 'so as to fit into the gaps 10f and 10f between the transparent film 1a and the transparent film 1a.
One method is to hold the edge portions 2 and 12 so that they are not peeled off, but the method is not limited to this. Thus, the recording surfaces 10a, 10a of the disk recording medium 10 '
Is covered with transparent films 12 and 12, so that if the disk recording medium is placed horizontally on a desk or floor to which dust adheres, the transparent films 12 and 12 come into contact with the dust. Also, the point that the recording surfaces 10a, 10a are not damaged is the same as the case of the invention according to the second and third aspects.

In the embodiment of the invention according to claim 6, as shown in FIG. 6, the edge portion 10d of the disk recording medium 10 'has elasticity to project in a ring shape in a direction perpendicular to the recording surface from the recording surface. The protection edge of the disk recording medium is characterized in that a projection 11 made of synthetic rubber or the like is detachably provided. By using such a protective edge of the disk recording medium, even in the conventional disk recording medium 10 ′ having no protective edge, the edge portion 1
The elastic projection 11 can be easily attached to 0d. When the disk recording medium 10 'having such a protective edge is placed horizontally on a desk or a floor, the projection 11 comes into contact with the desk or floor, and the recording surfaces 10a, 10a are placed on the desk. Since it is separated from the surface or floor, even if dust or the like adheres to the desk or floor, it does not come into contact with the recording surfaces 10a, 10a.
The point that 0a and 10a are not damaged is the same as in the case of the invention according to claims 1 and 4.

Further, according to an embodiment of the present invention, as shown in FIG. 7, the recording surfaces 10a, 10a of the disk recording medium 10 'are coated with the transparent films 12, 12, and the transparent film 12, , 12 and the edge 10d of the disk recording medium 10 '.
In this embodiment, a resilient projection 11 which protrudes in a ring shape in a direction orthogonal to a and 10a is a protective edge of a disk recording medium which is detachably provided. Thus, by covering the recording surfaces 10a, 10a of the disk recording medium 10 'with the transparent films 12, 12, when the disk recording medium is placed horizontally on a desk surface or a floor surface to which dust is attached. The point that the recording surfaces 10a, 10a are not damaged even when the transparent films 12, 12 contact the dust is as follows.
This is the same as the case of the invention according to the second, third, and fifth aspects. The transparent films 12, 12
Are recording surfaces 10a, 1 of a conventional disk recording medium 10 '.
0a, and the edges of the transparent films 12, 12 and the edge 10 of the disk recording medium 10 '.
By attaching the elastic projections 11 to d, the transparent films 12, 12 can be held so as not to peel off.

The projection 10 shown in FIG. 1 and FIG.
b, the projection 10b 'shown in FIG. 3, the projection 10b "shown in FIGS. 4 and 5, and the projection 11 shown in FIGS. 6 and 7.
From the edges of the disk recording media 10, 10 'to the recording surface 1
The height in the direction orthogonal to 0a, 10a is about 0.5 mm, and the width is about 1 mm to 2 mm, and such projections are formed or provided on the edges of the disk recording media 10, 10 '. However, this disk recording medium 10, 1
Recording and reproduction of 0 'are performed without any trouble.

FIG. 8 shows an embodiment of an edge cover of a disk recording medium according to the present invention, in which (a) is an exploded view and (b) is a joint of an arc-shaped cover described later. It is a front view of a part, and (c) is sectional drawing of a joining part. An embodiment of the edge cover of the disk recording medium according to the present invention is a divided arc-shaped cover 13 covering the edge portion 10d of the disk recording medium 10 '.
a and 13a 'are connected so as to form a ring-shaped cover 13 to form an edge cover of a disk recording medium configured to cover an edge 10d of the disk recording medium 10'. Arc-shaped cover 13 in this embodiment
Although a and 13a 'are formed in a semicircular shape (1/2 circular shape), they are not limited thereto, and may be formed in a 1/3 circular shape or a 1/4 circular shape.

The arc-shaped cover 13a has a U-shaped cross section, and the U-shaped recess 13d fits into the edge 10d of the disk recording medium 10 '.
0d is covered. For example, dovetail grooves 13b are formed at both ends of the one arc-shaped cover 13a, and projections 13c to be fitted to the dovetail grooves 13b are formed at both ends of the other arc-shaped cover 13a '. .

Since the edge cover of the disk recording medium according to the present invention is constructed as described above, as shown in FIG. 8A, both arc-shaped covers are provided from both edge portions of the disk recording medium 10 '. 13a, 13a 'are fitted to the edge 10d of the disk recording medium 10' as shown by the arrows, while the dovetail grooves 13b, 13b formed at both ends of one arc-shaped cover 13a are fitted to the other arc-shaped cover 13a '. The projections 13c, 13c formed at both ends of the disk recording medium 10 'are fitted together to form a ring-shaped cover 13.
Edge portion can be covered. Thus, the edge portion 1
When the disk recording medium 10 'with the 0d is placed horizontally on a desk or floor, the recording surface 10a of the disk recording medium 10' does not come into contact with the desk or floor. Even if is adhered, the recording surface 10a does not come into contact with the dust to be damaged. The connection of the arc-shaped covers 13a, 13a 'to form the ring-shaped cover 13 is not limited to the above-described structure, but may be performed by one end of one arc-shaped cover 13a and the other arc-shaped cover 13a'.
Is connected by a hinge (not shown), and the other end of one arc-shaped cover 13a and the other arc-shaped cover 13a '.
May be connected to each other by fitting the dovetail groove and the projection as described above.

[0023]

According to the first aspect of the present invention, a protection edge of a disk recording medium is provided in which an edge portion of the disk recording medium is integrally formed with a ring-shaped protrusion protruding in a direction perpendicular to the recording surface. According to the fourth aspect of the present invention, since a protrusion protruding in a ring shape in a direction perpendicular to the recording surface at the edge of the disk recording medium is provided separately as a protective edge of the disk recording medium, this protection is provided. When a disk recording medium with an edge is placed horizontally on a desk or floor, the projections abut on the desk or floor, and the recording surface is separated from the desk or floor. Even if dust or the like adheres to the floor surface, it does not come into contact with the recording surface and damage the recording surface.

According to a sixth aspect of the present invention, there is provided a disk recording medium for protecting a disk recording medium in which a resilient projection is provided at an edge of the disk recording medium in a direction perpendicular to the recording surface in a ring shape. With the use of the edge, even in a conventional disk recording medium having no protective edge, the elastic portion can be easily fitted with the elastic projection to obtain the same effect as described above.

According to a second, third, fifth or seventh aspect of the present invention, the recording surface of the disk recording medium is coated with a transparent film, and the edge of the transparent film is coated on the disk recording medium. The transparent edge covering the recording surface of the disk recording medium comes in contact with the dust adhering to the desk surface or floor surface by using the protective edge of the disk recording medium held so as not to peel off by the protrusion at the edge of the disk recording medium. However, the recording surface is not damaged.

The invention according to claim 8 is such that a plurality of arc-shaped covers covering the edge of the disk recording medium are connected so as to form a ring-shaped cover and cover the edge of the disk recording medium. Since the edge cover of the disk recording medium configured as described above is used, the edge cover can be easily fitted to the edge of the conventional disk recording medium, and the edge of the disk recording medium covered with the edge cover can be easily adjusted. When the is placed horizontally on a desk or floor, the recording surface of the disk recording medium does not touch the desk or floor,
Even if dust adheres to the desk surface or floor surface, the recording surface does not come into contact with the dust to be damaged.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the invention according to claim 1, and is a perspective view crossing a central portion.

FIG. 2 is a partial sectional view showing one embodiment of the invention according to claim 2;

FIG. 3 (a) is a perspective view showing an embodiment of the invention according to claim 3, and FIG. 3 (b) is a partial sectional view thereof.

FIG. 4 is a partial sectional view showing one embodiment of the invention according to claim 4;

FIG. 5 is a partial sectional view showing one embodiment of the invention according to claim 5;

FIG. 6 is a partial sectional view showing one embodiment of the invention according to claim 6;

FIG. 7 is a partial sectional view showing one embodiment of the invention according to claim 7;

8 (a) is an exploded view, FIG. 8 (b) is a front view of a joint of an arc-shaped cover, and FIG. 8 (c) is a cross section of the joint. FIG.

FIG. 9 is a perspective view showing a conventional protective case for a disk recording medium.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage part 1a Concave surface 1b Fitting protrusion 1c One end 1d Engagement concave part 2 Lid 2a One end 2b Engagement convexity 3 Support shaft C Protective case D Disk recording medium d Center hole 10 Disk recording medium 10a Recording surface 10b Projection 10b 'Protrusion 10b' Protrusion 10c Center hole 10d Edge 10e Recessed groove 10e 'Recessed groove 10f Gap 11 Projection 11a Recess 12 Transparent film 13 Ring-shaped cover 13a Arc-shaped cover 13a' Arc-shaped cover 13b Dovetail 13c Projection

Claims (8)

[Claims] 1. A protective edge for a disk recording medium, wherein a projection protruding in a ring shape in a direction perpendicular to a recording surface is formed integrally with an edge of the disk recording medium. 2. An edge portion of a disk recording medium is integrally formed with a protrusion projecting in a ring shape in a direction orthogonal to a recording surface, and a disk recording medium is formed at a connecting portion between an inner periphery of the protrusion and the recording surface. A protective edge for a disk recording medium, wherein a concave groove is formed so that an edge portion of a transparent film coated on a recording surface of the medium fits and is held so as not to be peeled off. 3. An intermittent projection is formed integrally with an edge of the disk recording medium in a direction orthogonal to the recording surface, and a connecting portion between the inside of the intermittent projection and the recording surface is provided with:
A protective edge for a disk recording medium, wherein a concave groove is formed in which an edge portion of a transparent film coated on a recording surface of the disk recording medium is fitted and held so as not to be peeled off. 4. A protective edge of a disk recording medium, wherein a separately formed protrusion projecting in a ring shape in a direction perpendicular to the recording surface is joined to an edge of the disk recording medium. 5. A separately formed protrusion projecting in a ring shape in a direction perpendicular to the recording surface from the recording surface at an edge portion of the disk recording medium, and a gap formed between the inner periphery of the protrusion and the recording surface. A protective edge for a disk recording medium, wherein a gap is provided in which the edge of the transparent film coated on the recording surface is fitted and held so as not to be peeled off. 6. A protective edge of a disk recording medium, wherein a resilient projection is provided on an edge of the disk recording medium, the elastic projection protruding in a ring shape in a direction perpendicular to the recording surface. 7. The recording surface of the disk recording medium is covered with a transparent film, and the edge of the transparent film and the edge of the disk recording medium have elasticity to project in a ring shape in a direction perpendicular to the recording surface. A protection edge for a disk recording medium, wherein a projection is provided detachably. 8. The disk recording medium is characterized in that a plurality of divided arc-shaped covers covering the edge of the disk recording medium are connected to form a ring-shaped cover so as to cover the edge of the disk recording medium. Edge cover of disc recording medium.