JP2759440B2 - CD protective film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to an exchangeable CD
The present invention relates to a CD protective film adhered to a smooth surface on the reading side of a (compact disc).

[0002]

2. Description of the Related Art Conventionally, there is no particularly effective method for protecting a smooth surface on the reading side of a CD. Therefore, the user
Care is taken not to damage the smooth surface on the reading side of the CD. However, this often damages the smooth surface on the reading side of the CD, and if the smooth surface on the reading side of the CD is damaged, it is not economical because any expensive one must be discarded.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been developed to effectively reduce the number of CDs.
It is an object of the present invention to provide a CD protective film that can protect the smooth surface on the reading side and can be replaced when it is soiled or broken.

[0004]

SUMMARY OF THE INVENTION The present invention provides a method for reading a CD.
A transparent CD protective film adhered to the smooth surface of the CD, the CD protective film covering a smooth surface on the reading side capable of covering the smooth surface on the reading side of the CD and an inner edge ring portion inside the CD. The CD protective film having an extension portion appropriately formed so as to be adhered, and having the above configuration, is formed by an electrostatic adsorption principle.
Since the CD protective film, which is deposited on the smooth surface of the reading side of the CD, and depositing a protective film of the present invention to the smooth surface of the reading side of the CD, effectively a smooth surface of the read side of the CD When the protective film becomes dirty or broken, it can be replaced directly, which is very convenient.

[0005] Further, since the protective film is made of a material having no water absorption, no water droplets adhere to the smooth surface on the CD reading side, so that the life of the CD and the reproducing effect can be prevented from being impaired.

When the thickness of the protective film is less than 60 μm, the refractive index of the light beam is small, so that it does not significantly affect the reproduction of the CD. Further, the extended portion of the CD protective film is a short piece of eight pieces, and if it is adhered to the inner edge ring portion inside the CD with an adhesive, the state of adhesion of the protective film to the CD can be stabilized. it can.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a CD protective film of the present invention, and FIG.
FIG. 3 is a perspective view showing a state in which a D protective film is attached to a smooth surface on the reading side of a CD, and FIG. 3 is a sectional view of FIG.

As shown in FIG. 1, a normal CD includes a metal film constituting a data recording portion and a transparent material (protective layer) sandwiching the metal film from both upper and lower surfaces. In such a CD, a circular hole 52 at the center, an inner ring portion 54 at an outer edge of the circular hole 52, a transparent material 58 covering a data recording portion at an outer edge of the inner ring portion 54, Transparent covering
An outer ring 56 surrounding the material 58;
Is configured. Hereinafter, the transparent material 58 covering the data recording portion
The surface on the CD reading side is referred to as the "smooth surface on the CD reading side".
U.

On the other hand, as shown in FIGS. 1 to 3, the protective film 10 of the present invention covers the data recording portion of the CD piece 50.
An extension 1 for attaching the transparent material 58 to the smooth surface coating portion 12 on the CD reading side and the inner edge ring portion 54 of the CD 50
And 4. With this protective film, the CD
Covering the smooth surface on the reading side can prevent damage to the smooth surface on the reading side of the CD due to dust or foreign matter on the left surface. Further, the extension 14 is attached to the CD piece 50 with an adhesive.
When the protective film is attached to the inner peripheral ring portion, it is very useful because it helps to attach the protective film and also serves as a handle for removing the protective film when replacing the protective film. Further, in the present invention, since the protection film is attached to the CD according to the principle of electrostatic attraction, the protection film and the CD can be correctly bonded.

FIGS. 4 and 5 show a second embodiment of the present invention. FIG. 4 is a perspective view and FIG. 5 is a partial sectional view. In this embodiment, a plurality of projecting short pieces 15 are formed on the outer peripheral edge of the CD protective film according to the present invention, and when the CD protective film 10 is attached to the CD, the projecting short pieces 15 are inverted at the outer peripheral edge of the CD. Then, it is pasted on the upper surface of the CD. This can prevent the outer peripheral edge of the CD protective film 10 from peeling off.

The extension of the protective film of the present invention is preferably composed of eight short pieces. However, the present invention is not limited to this, and a designer may design another shape in some cases. Also,
As the material of the CD protective film of the present invention, a material having no water absorption is used, but the material is not limited to this, and another material may be appropriately used.

The thickness of the protective film of the present invention is preferably 60 μm or less. In this case, since the light refractive index of the protective film is low, there is no adverse effect on reproducing data on the data recording surface.

[0013]

Since the present invention adheres to the smooth surface on the reading side of a CD, damage to the smooth surface on the reading side of a CD can be avoided. Further, since the protective film is adhered by the principle of electrostatic attraction, the protective film can be correctly adhered to the smooth surface on the CD reading side . In addition, the thickness of the protective film is set to 60 μm.
With the following, the light refractive index of the protective film can be reduced. Moreover, the CD protective film according to the present invention is replaceable, and if the protective film becomes unusable, it may be replaced, so that the preservability of the CD can be improved. Further, by forming the protruding short piece on the outer peripheral edge of the CD protective film according to the present invention, the peeling of the protective film from the CD piece can be prevented, and the adhesion of the CD protective film to the CD piece is further enhanced. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a CD protective film of the present invention.

FIG. 2 is a perspective view showing a state where a CD protective film of the present invention is attached to a smooth surface on the reading side of a CD.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is a perspective view showing another embodiment of the CD protective film of the present invention.

FIG. 5 is a partial sectional view showing another embodiment of the CD protective film of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Protective film 12 Smooth surface covering part on reading side 14 Extension part 15 Protruding short piece 50 CD piece 52 Circular hole 54 Inner ring 56 Outer ring 58 Transparent material covering data recording part

Claims (6)

(57) [Claims] 1. A transparent CD protective film adhered to a smooth surface on a reading side of a CD, wherein the CD protective film reads a CD.
CD protective film having the above-mentioned configuration, having a reading-side smooth surface coating portion capable of covering the smooth surface on the reading side , and an extension portion appropriately formed so as to be attached to the inner edge ring portion inside the CD. Is a CD protective film that is adhered to a smooth surface on the reading side of a CD by the principle of electrostatic attraction. 2. The CD protective film according to claim 1, wherein said protective film is made of a material having no water absorption. 3. The CD protective film according to claim 1, wherein the thickness of the protective film is 60 μm or less. 4. The CD protective film according to claim 1, wherein the extension in the CD protective film is eight short pieces. 5. The CD protective film according to claim 1, wherein the extension portion is attached to an inner edge ring portion inside the CD by an adhesive. 6. A plurality of protruding short pieces are formed on an outer peripheral edge of the recording covering portion, and when the short pieces are attached to a CD,
2. The CD protective film according to claim 1, wherein the outer periphery of the CD is turned over to the upper surface of the CD and attached to the upper surface of the CD.