JP3564015B2 - Card type information record carrier - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a card-type information record carrier in which a large amount of digital information is recorded on a portable card using optical means.
[0002]
[Prior art]
A large amount of digital signal information, such as various types of personal information, transaction information, guidance information, video, music, game programs, etc., is recorded on a cash card or credit card-sized resin card by using optical means, and is carried on the portable card. as those capable manner, the card-type information recording medium 1 as shown in FIG. 3 has been known.
[0003]
This card-type information recording carrier 1 has one surface (back surface in the figure) of a substrate 2 as a printing surface 3 on which characters and graphics are printed, and a circular recording portion 4 is provided at the center of the opposite surface. . Digital information is written in the recording unit 4 by a recording method similar to that of a CD (compact disk, but also including a CD-ROM and a CD-R) and a DVD (digital video disk). Reproduction of the written information is performed by a reading device for CD or DVD. In order to set the card-type information recording carrier 1 in a writing device or a reading device and rotate the card-type information recording carrier 1 at a high speed, a hole 5 to be fitted in a drive shaft of the writing device or the reading device is provided in the center of the card-type information recording carrier 1. Is provided.
[0004]
By the way, currently used CDs and DVDs are standardized in size to a diameter of 12 cm, but a so-called single size of 8 cm in diameter is also used in music CDs and the like. For this reason, the CD reading device can handle both disc sizes of 12 cm and 8 cm in diameter.
[0005]
FIG. 4 shows a tray T of a CD reading device incorporated in a personal computer or the like. The tray T is held so as to protrude and retract from a main body (not shown) of a personal computer or the like. When a disc is horizontally placed on the tray T and accommodated in the main body, the tray T is provided at the center of the disc. The hole is automatically fitted or attracted to the drive shaft in the main body. On the upper surface of the tray T, there are formed a shallow circular recess t1 for mounting a disc having a diameter of 12 cm, and a deeper round recess t2 for mounting a disc having a diameter of 8 cm inside the recess. In order to move the read head along the radial direction of the disk, a notch t3 having a substantially U-shape in plan view is formed from near the center of the tray T to the main body. The width of the notch t3 is usually 4 cm to 5 cm.
[0006]
On the other hand, the size of general cards is almost unified to about 55 mm in length and about 85 mm in width. Therefore, when the card-type information recording carrier 1 formed according to this size is placed on the tray T as described above, as shown in FIG. 4 , the card-type information recording carrier 1 is notched t3 and deep inside. It will be placed on the shallow circular recess t1 straddling the circular recess t2. However, the mounting state is poor in stability, and depending on the mounting direction of the card-type information recording carrier 1, when the tray T is accommodated in the main body, the position is shifted and the tray T is not set properly on the drive shaft, or notched. Troubles such as slipping off the portion t3 and being obliquely caught in the main body occur.
[0007]
Therefore, conventionally, card-type information recording carriers 1a and 1b as shown in FIGS. 5 and 6 have been provided. Each of the illustrated card-type information recording carriers 1a and 1b is formed by punching a CD having a diameter of 12 cm into a general card size . In the card-type information recording carrier 1a shown in FIG. A protrusion 6a is formed at a position of 4 cm, and in the card-type information recording carrier 1b shown in FIG. 6 , an arc-shaped protrusion 6b is formed at a position of a radius of about 4 cm from the center, and the protrusion 6a and the protrusion 6b It protrudes from the 4 side surface. The positions of the projections 6a and the ridges 6b coincide with the outer edges of the disk having a diameter of 8 cm. By mounting the card-type information recording carrier 1, the card-type information recording carrier 1 can be set correctly at the center of the tray T.
[0008]
[Problems to be solved by the invention]
However, since the projections 6a and the ridges 6b are formed by beating the substrate 2 from the printing surface 3 side of the card-type information recording carriers 1a, 1b with a processing tool having a sharp tip, the projections 6a and the projections 6b fall off the substrate 2. There was a risk of dripping or chipping. Further, when the card type information recording carriers 1a, 1b are pressed down with the projections 6a and the ridges 6b downward, the substrate 2 may be broken at the positions of the projections 6a and the ridges 6b. .
[0009]
In the case where the projections 6a are provided, all the projections 6a do not follow the periphery of the circular recess t2 when the tray 6 is placed on the tray T. When the tray T is accommodated in the main body, the position is not shifted properly when the tray T is accommodated in the main body, so that all of the four projections 6a are removed. There is such an inconvenience that it is necessary to always pay attention during setting along the periphery of the circular recess t2.
[0010]
The present invention has been made in view of the above circumstances, and has a card-type information recording carrier formed so that the shape can be easily mounted on the center of the tray T of the reading device and the shape is hardly damaged or deformed. And a method of manufacturing the same.
[0011]
[Means for Solving the Problems]
The card-type information recording carrier of the present invention is characterized in that a plate thickness at a central portion within a certain radius from the center is larger than a plate thickness at an outer portion of the radius. By matching this radius to the size of other common disk-shaped record carriers, it is easy to set the record / read device corresponding to such a record carrier, and the central portion is uniformly thickened to be damaged or deformed. Is less likely to occur.
[0013]
Also, since to form the thickness of the step on both sides of the card-type information recording medium, it is possible to increase the amount of information that can be recorded by forming a recording portion on both sides.
[0014]
It is preferable that the card-type information recording carrier has a substantially rectangular planar shape, the dimension from the center to each corner is more than 4 cm and 6 cm or less, and the radius is 4 cm. According to this, it can be handled and carried in the same manner as general cards, and can be reproduced by a CD writing / reading device corresponding to a disc size of 12 cm in diameter and 8 cm in diameter.
[0015]
Additional card information recording responsible body, formed by integral molding of tree fat. According to this, the resin constituting the substrate of the card-type information recording carrier is uniformly integrated, and the overall strength is obtained, so that a card-type information recording carrier that is less likely to be damaged or deformed can be manufactured.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows the overall shape of a card-type information recording carrier 10 of the present invention, and FIG. 2 also shows a vertical section.
[0018]
The card-type information recording carrier 10 has a resin substrate 20 formed in a rectangular shape having a size similar to general cards, specifically, a short side of about 56 mm × a long side of about 85 mm. The corners of the substrate 20 are chamfered into rounded corners, so that the dimension from the center to each corner of the substrate 20 is about 50 mm.
[0019]
At the center of the substrate 20, a hole 50 having a diameter of about 15 mm is formed penetrating the front and back.
[0021]
In the substrate 20, the thickness of the central portion 21 within a radius of 4 cm from the center is slightly larger than the thickness of the outer portion 22, so that an arc-shaped step 23 is formed on the surface of each surface.
[0022]
At the center of this surface, a recording unit 40 for writing digital information is formed concentrically with the center hole 50. The size of the recording unit 40 is within a circular range whose diameter is smaller than the short side dimension of the substrate 20. Digital signal information is written in the recording unit 40 by a recording method similar to that of a CD. However, the information recording method is not limited to this, and another optical recording method such as DVD, MO (magnet optical disk), MD (mini disk) may be used. The content of the recorded information also depends on its use, such as various personal information (for example, medical / health information, membership information, credit information, etc.), commercial transaction information, entertainment information, advertising information, various guidance information, game programs, etc. Can be arbitrarily selected, and the type of information can be freely combined with character data, image data, music data, and the like.
[0023]
In order to reproduce the written information, for example, a reading device for a CD as shown in FIG. 4 is used. When the card-type information recording carrier 10 is placed on the tray T of the reading device with one of the recording portions 40 facing down, a thick central portion 21 is formed in a deep circular recess formed inside the tray T. At time t2, the card-type information recording carrier 10 is set correctly at the center of the tray T because the thin outer portion 22 is placed on the shallow circular recess t1 formed outside the tray T. . Since the thickness of the central portion 21 is uniform, the orientation of the card-type information recording carrier 10 when setting it on the tray T is not particularly limited. When the card-type information recording carrier 10 rotates, the arc-shaped step 23 follows the periphery of the deep circular recess t2, so that the posture during rotation is also stable. The same applies when the card-type information recording carrier 10 is set in a writing device for writing information.
[0024]
This card type information recording carrier 10 is manufactured by integral molding of resin. The resin material of the substrate 20 is not particularly limited as long as it has hardness and dimensional stability not to be easily bent and has necessary optical characteristics. In particular, the resin material is preferably made of polycarbonate or PMMA (polymethyl methacrylate). ) Are suitable. Such a resin is used as a material of the substrate 20, and a recording layer, a reflective layer, a protective layer, and the like for forming the recording unit 40 are laminated and integrally molded, so that the entire substrate 20 is uniformly integrated, and damage or deformation is prevented. It is possible to obtain a card-type information recording carrier 10 that is unlikely to occur.
[0026]
The above-described embodiment is formed in accordance with the widely used CDs of 12 cm and 8 cm in diameter and the standards and forms of the writing / reading device. The vertical and horizontal sizes of the card-type information recording carrier 10 are also approximated to those of general cards. However, the outer shape of the card-type information recording carrier 10 does not necessarily have to be as described above, and may have another shape including a polygon depending on the application. Further, if the recording method to be supported or the standard of other record carrier changes, the outer shape of the card-type information record carrier 10, the thickness of the central portion 21 and the outer portion 22, the radius of the step 23, and the like also change. . Depending on the recording method, it is possible to increase the amount of information that can be recorded by forming the recording portions 40 on both sides of the substrate 20 and forming the arc-shaped steps 23 on both sides. Further, in holding the card-type information recording carrier 10 on the drive shaft of the writing / reading device, the size of the central hole 50, the shape of the peripheral edge thereof, the plate thickness, etc. are appropriately changed according to the holding form on the drive shaft side. You may.
[0027]
【The invention's effect】
According to the card-type information recording carrier of the present invention, the thickness of the central portion within a certain radius from the center is formed so as to be larger than the thickness of the outer portion, and the radius of the step is changed to another general disk shape. By adjusting the size of the record carrier, it is easy to set the record carrier in a writing / reading device corresponding to the record carrier, and the shape of the record carrier is not easily damaged or deformed.
[0028]
In addition, since the steps of the plate thickness are formed on both front and back surfaces, a recording portion can be formed on both surfaces to increase the amount of information that can be recorded.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a card-type information recording carrier of the present invention.
FIG. 2 is a longitudinal sectional view of a long side direction of the card type information recording carrier.
FIG. 3 is a perspective view showing an example of a conventional card-type information recording carrier.
FIG. 4 is a perspective view showing a tray of a general CD reading device and a state of a card type information recording carrier placed on the tray.
FIG. 5 is a perspective view showing another example of a conventional card-type information recording carrier.
FIG. 6 is a perspective view showing still another example of a conventional card-type information recording carrier.
[Explanation of symbols]
10 Card type information record carrier 21 Central part 22 Outer part

Claims (2)

Card type information characterized in that a plate thickness at a central portion within a certain radius from the center is formed to be larger than a plate thickness at an outer portion of the radius, and a step of plate thickness is formed on both front and back surfaces. Record carrier. The card-type information recording carrier according to claim 1 , wherein the card-type information recording carrier has a substantially rectangular planar shape, a dimension from the center to each corner is more than 4 cm and 6 cm or less, and the radius is 4 cm .

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