JP3025597U - Electronic publications and CD protectors - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to reduce the proportion of a CD protector in a paperback type electronic publication. [Structure] A paperback book-type electronic publication having a structure in which a 3 mm thick CD protector is fixed to the inside of the front cover of the paperback book. [Effect] The book has a lot of information and can be abundant in information.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is for a library book, a dictionary, a television game, an electronic picture book, an electronic book, a read-only compact disc (CD-ROM), a digital video compact disc (DVD), a karaoke CD, and various games. It relates to electronic publications for all purposes such as CDs, educational and learning CDs, acoustic CDs such as musical instruments, and image CDs.

[0002]

[Prior art]

 The thickness of the conventional CD protector needs to be 4.2 mm or more in terms of strength and structure. When fixed to the inside of the back cover of a 10 mm thick paperback book, the thickness of the front cover of 2 mm and the back cover of 2 mm is 4 mm, and the total thickness of the CD protector is 4.2 mm, which is 8.2 mm, and the remaining 1.8 mm. Only 18 pages could fit in the book, and the number of pages was only 36.

[0003]

[Problems to be solved by the device]

 Today, in the information age, there is a strong demand to increase the number of pages as much as possible, and the reference number is MD07-008 (2). An object of the present invention is to increase the number of pages of a book by reducing the thickness of the CD protector for the same book thickness.

[0004]

[Means for Solving the Problems]

 Conventionally, as shown in the external perspective view of FIG. 1, when the ratio of the CD protector-1 is calculated, the front cover 2 and the back cover 3 each have a thickness of 2 mm, the CD protector-1 has a thickness of 4.2 mm, and When the thickness is 10 mm, the ratio of the CD protector-1 is 42% and the ratio of the book 4 is only 18%. In the present invention, as shown in FIG. 2, the CD protector-1 has a thickness of 3 mm and the book 4 portion is increased to 30%.

[0005]

According to the present invention, the portion of the book 4 is increased by 12% as compared with the conventional one, and it has become compatible with the information age. Furthermore, it is very important from the standpoint of reducing the resistance of the book sect to the readers who are already familiar with CD-ROMs and have a large proportion of books in the world.

[0006]

EXAMPLE If the thickness of the CD protector is made thinner, the number of books will be increased, but it is not easy due to the limitation of the strength of the CD protector. The present invention uses 1 mm polypropylene as a material, and as shown in FIG. 3, a plurality of slit-like elastic pieces 5 for elastically holding the central hole of the CD from the inside are formed, and the central hole of the CD has a central hole. Molded to provide a tab 6 that elastically frictionally engages the inner wall to hold the CD in place.

The bottom of the CD protector has a thin wall of 0.85 mm. In order to support the information recording part of the CD slightly floating from the bottom, the peripheral edge of the CD comes into contact with the center hole of the CD protector-The supporting tab step 7 which is 0.1 mm higher than the bottom, the supporting peripheral step 8 are provided. Reference number = MD07-008 (3)

The user slides the tip of his finger under the edge of the CD, and at the same time lifts the edge of the horizontal CD slightly up with his / her finger, the upright tab is pushed inside and the CD is pulled out from the tab. be able to. The fitting portion of the tab is formed in a reverse taper whose diameter decreases downward.

The peripheral edge of the CD protector is formed on the edge 9 of the Π-shaped structure in order to provide strength. Due to the viscoelastic material of polypropylene and the above structural design, it was possible to achieve sufficient strength to protect the CD and to make the thickness 3 mm. Furthermore, by using a light polypropylene and thinning it, the weight of 29g of the conventional CD protector was reduced by 55% and the weight was 13g.

[0010]

[Effect of device]

 CDs can be stored easily and securely, they are not bulky when bound in a paperback book, and because they are lightweight, they are treated as standard-sized mail and the postage can be reduced. Furthermore, the appearance is good and the product value is increased.

[0011]

[Brief description of drawings]

FIG. 1 is a perspective view of a paperback type electronic publication using a conventional CD protector.

FIG. 2 is a perspective view of a paperback type electronic publication using the CD protector of the present invention.

FIG. 3 is an enlarged perspective view of a main part of the CD protector of the present invention.

FIG. 4 is a sectional view taken along the line AA of the CD protector of the present invention. Reference number = MD07-008
(4)

[Explanation of symbols]

 1 Conventional CD protector 2 Front cover 3 Back cover 4 Book 5 Slit-shaped elastic piece 6 Tab 7 Support tab step 8 Support peripheral step 9 П-shaped structure edge

Claims (3)

[Scope of utility model registration request] 1. An electronic publication in which a CD protector having a thickness of 3 mm is fixed to the inside of the front cover or the inside of the back cover of a book. 2. The electronic publication according to claim 1, wherein the short side is 120 ±.
An electronic publication characterized by being a paperback book having a length of 2.5 mm, a long side of 140 ± 5 mm, and a thickness of 15 mm or less. 3. A polypropylene having a short side of 120 ±
0.5mm, long side 130 ± 5mm, thickness 3mm, weight 1
A CD protector characterized by being 3 g or less.