JPH0559666U - Card holder - Google Patents

Abstract

(57) [Summary] [Purpose] When reproducing audio information standardized to the CD specifications of a read-only card-type thin optical storage medium formed on a card-type thin substrate such as a telephone card (registered trademark). It is intended to provide a card holder which can be used for the above and can be accurately reproduced. [Structure] An optically transparent substrate 1 having a thickness of 1.2 mm has a hole 4 with a diameter of 15 mm at the center, and a circle having a radius of 20 to 25 mm and concentric with the center hole is a scribed substrate. The size of the substrate is 50 to 70 mm in length and 50 to 100 mm in width, and the substrate has a hole with a thickness of 10 to 600 μm and a radius of 16 to 25 mm in the center and a size of 50 to 70 mm in length. , Cover 50 to 100 mm wide
Is a card holder in which a spacer 3 having a thickness of 10 to 600 μm is covered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a card holder required for reproducing a CD specification card type thin read-only optical storage medium.

[0002]

[Prior Art]

 A typical example of the reproduction-only optical storage medium is a CD (Compact Disk) medium that stores audio information. This medium is obtained by injection molding polycarbonate resin with a plate thickness of 1.2 mm. The concavo-convex shape corresponding to the audio information is formed on the substrate surface by transferring the concavo-convex shape made on the nickel sheet by injection molding. A CD medium can be obtained by forming a reflection film on the concave-convex surface.

With the recent increase in the amount of information processing, various measures have been taken to increase the amount of information of the optical storage medium per volume. As one of the methods, a method of recording information on a thin substrate is being studied. If the substrate is made thin, the plastic substrate will be warped and warped, so a means to reduce warpage and warpage was necessary for good reproduction. In addition, when reproducing information using an existing reproducer, the reproducing optical system of the reproducer is designed on a transparent substrate with a plate thickness of 1.2 mm, so it is possible to accurately reproduce information using only a thin plate. Since it cannot be read out, it was necessary to make optical corrections suitable for the thin plate.

[0004]

[Problems to be solved by the device]

 In order to accurately read the information recorded on the read-only thin plate medium, it is necessary to remove the warpage and the flexure that occur during playback on the playback device. It is also necessary to make optical corrections that match the thin substrate. In order to solve these problems, when the second substrate is used, the problem is how to align the second substrate and the thin plate medium and how to perform the centering.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention can include an optically transparent substrate, specifically, an acrylic substrate, a polycarbonate substrate, a vinyl chloride substrate, a celluloid substrate, or the like. Prepare a 1.2 mm one. This is because, regarding the CD-type card-type thin read-only optical storage medium to be played back using the present invention, it is assumed that an optically opaque medium that cannot be played back from the substrate side of the medium is also played back. It is recorded on the surface of the medium, and it is considered to reproduce from the surface side recorded on this surface. For this reason, the transparent substrate requires a plate thickness of 1.2 mm for an ordinary optical storage medium. If the substrate material mentioned above is used and the plate thickness is 1.2 mm, when reproducing a thin optical storage medium, stable reproduction can be performed without causing warping or bending.

Next, the substrate having this thickness is processed into an outer periphery to a size that can be loaded into a normal CD specification reproducing machine. Since a disc with a normal CD specification has a diameter of 120 mm, when it is used for reproducing a card type optical storage medium, a rectangle with a length of 70 mm and a width of 100 mm is the largest. In addition, since the signal is recorded from a diameter of 50 mm on a CD-type disc, the minimum substrate shape is a square with a length of 50 mm and a width of 50 mm.

As can be seen from the explanatory view of the card holder according to the present invention shown in FIG. 1, in order to load a substrate having such a size into a CD specification reproducing apparatus, a spindle rotating at the center of the reproducing apparatus is used. It is necessary to provide a hole in the board with a hole diameter that matches the center axis with a diameter of 15 mm. Since it is necessary that the center of the hole with the diameter of 15 mm of the substrate and the center of the track consisting of the information sequence recorded in the thin optical storage medium have the same center, the hole with the diameter of 15 mm is required. A mark consisting of an arc that is concentric with is provided. As a result, the center of rotation of the transparent support substrate and the center of rotation of the thin optical storage medium information sequence can be aligned with each other to improve the reproduction accuracy. As for the position of the mark, in the CD specification disc, information such as voice is stored from a half diameter of 25 mm, and ID information for identifying the disc is recorded inside the radius of 25 mm. Therefore, it is desirable to mark the radius from 20 mm to 25 mm. The accuracy of centering is reduced at the position where the radius is 20 mm or less and 25 mm or more.

FIG. 1 is a schematic perspective view of a card holder of the present invention, in which 1 is a transparent square substrate, 2 is a cover sheet, 3 is a spacer, 4 is a central hole, 5 is a hole of a carver sheet, and 6 is a hole. The removed portion, 7 shows a marking mark.

The card type thin optical storage medium is mounted on a card holder of the present invention as shown in FIG. 1 and reproduced. When using a commercially available sheet or thin plate substrate, the thickness of the medium is 10 μm to 600 μm. Therefore, in order to mount the thin plate medium on the card holder of the present invention without damaging it, it is desirable to provide a spacer having the same thickness as the medium, that is, 10 μm to 600 μm, as shown in FIG. .. As the spacer, a polyethylene terephthalate (PET) sheet, a vinyl chloride sheet, a cellulose sheet, or a polypropylene sheet can be used. Also, a commercially available double-sided adhesive tape can be used.

To prevent the card-type thin optical storage media aligned with each other from being displaced, a holding cover is required. This cover is the same size as the transparent substrate, that is, 50 mm to 70 mm in length, Transparency is not required if the width is 50 mm to 100 mm. Higher transparency makes it easier to align the card-type thin optical storage medium. As the material of the cover, a polyethylene terephthalate (PET) sheet, a vinyl chloride sheet, a cellulose sheet, or a polypropylene sheet can be used. A commercially available product with a thickness of 10 μm or more can be used, but the maximum thickness is 600 μm when playing with a CD specification player due to the restrictions of the player.

When a hole having a radius of 16 mm to 25 mm is formed in the center of the cover, the center alignment of the card type thin optical storage medium is easy. The radius was set to 16 mm to 25 mm considering the work of fitting it to the inner diameter hole diameter of 15 mm of the card type thin optical storage medium and also considering the recording area radius of 25 mm so as not to pollute the medium. Further, as shown in FIG. 1, in order to facilitate the loading of the card type thin optical storage medium into the card holder, it is preferable to provide a hollow portion at the card insertion port.

A general adhesive can be used to bond the 1.2 mm-thick transparent substrate, spacer, and cover sheet together. You can also use double-sided adhesive tape. However, care must be taken when using an instant adhesive, as the transparent substrate may become white depending on the material.

[0013]

【Example】

Hereinafter, embodiments of the present invention will be described in detail. Example 1 A 15 mmφ hole was formed in the center of a cell-cast acrylic substrate (optical grade) having a thickness of 1.2 mm. In addition, a marking line having a depth of 50 μm and having the same center as the 15 mmφ hole was marked with a radius of 21 mm to form a mark. A square of 70 mm in length and 100 mm in width was cut out so that the 15 mmφ hole was at the center of the rectangle. The four corners are rounded. The spacer was made up of commercially available double-sided adhesive tape to a thickness of 250 μm. It was cut out to a width of 3 mm, and was bonded in three directions to the surface that is the back surface of the surface of the transparent quadrilateral substrate with the marking lines. A transparent polypropylene sheet with a thickness of 200 μm is cut into a square with a length of 70 mm and a width of 90 mm, and when they are laminated, a hole with a radius of 17 mm is opened so that the center of the hole is the center of the 1.2 mm board and the card is inserted. A cutout portion was formed in the same portion as in FIG. The cover sheet was attached to the already applied adhesive.

Transferred to a PET thin substrate (size: length 54 mm, width 86 mm, thickness 200 μm) by the 2P method (photocurable resin), recorded in CD specifications, and formed an aluminum reflection film on the surface. , Insert the read-only card-type thin optical storage medium into the card holder manufactured by the method described above, and make sure that the center of the mark of the card holder and the circumference of the information pit row of the storage medium are concentric. , Correcting the displacement with your finger from the center hole of the cover and the cutout provided in the insertion part, and mounting this on a commercially available CD player with the cover side of the card holder facing up, and playing it back. , I was able to play the voice information.

Example 2 A 15 mmφ hole was formed in the center of a 1.2 mm thick polycarbonate substrate molded by the injection molding method. A marking line was put in a radius of 23 mm so as to be concentric with the hole of 15 mmφ and used as a mark. A square was cut out in the same size as in Example 1. A spacer made of a cellulosic sheet having a thickness of 200 μm and a width of 3 mm was adhered to the substrate using a commercially available adhesive on the opposite surface of the transparent square substrate having the marking marks. Cut the PET sheet into 70 mm long and 90 mm wide, and put a cover sheet with a hole with a radius of 20 mm and a cutout part in the card insertion slot so that the center of the hole is at the center of the 1.2 mm thick board, and insert a spacer between them. It was attached to the substrate with a commercially available adhesive.

The read-only card type thin optical storage medium manufactured by the 2P method on the telephone card is inserted into the card holder manufactured by the above method, and the scribe mark of the card holder and the information pit row of the storage medium are inserted. When the position of the card type thin optical storage medium was corrected so that the center of the circle was concentric with the circumference, and the information was reproduced by a commercially available CD player, the audio information could be reproduced.

[0017]

[Effect of the device]

 As described above, by using the card holder according to the present invention, the audio information standardized in the CD specifications of the reproduction-only card type thin optical medium formed on the card type thin substrate such as a telephone card can be recorded. , Can be played easily.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a card holder of the present invention.

[Explanation of symbols]

 1 Transparent square substrate 2 Cover sheet 3 Spacer 4 Center hole 5 Cover sheet hole 6 Cutout part 7 Scribing mark

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location G06K 19/00 19/06

Claims (1)

[Scope of utility model registration request] 1. An optically transparent substrate having a thickness of 1.2 mm, having a hole with a diameter of 15 mm at the center, and a circle having a radius of 20 to 25 mm and being concentric with the central hole is a scribed substrate. , The size of the substrate is 50 to 70 mm in length and 50 to 100 mm in width, the substrate has a hole with a thickness of 10 to 600 μm and a radius of 16 to 25 mm, and a size of 50 to 50 mm in length. 70mm, 50-100mm wide cover,
A card holder characterized by being covered with a spacer having a thickness of 10 to 600 μm.