JPH01151424U

JPH01151424U -

Info

Publication number: JPH01151424U
Application number: JP1987195790U
Authority: JP
Priority date: 1987-12-25
Filing date: 1987-12-25
Publication date: 1989-10-19

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の縦断面図、第２図は
平面図、第３図は一使用状態の斜面図、第４図は
他の実施例の縦断面図、第５図は従来例の縦断面
図である。１…グルーブ形成面、１_１…表側面、２…中心
孔、３…デイスク基板、４…外周面、５…凸条、
５_１…凹条、６…中央凹部、１０…デイスクカー
トリツジ。 Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a perspective view of one state of use, Fig. 4 is a longitudinal sectional view of another embodiment, and Fig. 5 is a conventional one. FIG. 3 is an example vertical cross-sectional view. DESCRIPTION OF SYMBOLS 1... Groove formation surface, 1 ₁ ... Front surface, 2... Center hole, 3... Disk substrate, 4... Outer peripheral surface, 5... Convex strip,
5 ₁ ... Concave strip, 6... Center recess, 10... Disk cartridge.

Claims

[Claims for Utility Model Registration] (1) A circular shape having a groove forming surface 1 that can be recorded and reproduced by an optical method or magneto-optical method on a flat front surface ₁₁ , and a center hole 2 in the center. An information disk characterized in that the disk substrate 3 is provided with protrusions 5 or grooves ₅₁ for engagement on the outer peripheral surface of the disk substrate 3. (2) The engagement protrusion 5 is connected to the disk substrate 3.
2. The information disk according to claim 1, which is a chevron-shaped convex strip formed continuously or discontinuously in a ring shape around the periphery of the disk. (3) Utility model registration claim 1, wherein the retaining groove 5 ₁ is a V-groove formed continuously or discontinuously in a ring shape at the center of the outer peripheral surface of the disk substrate 3.
Information disc listed in section.