JPS6157321U

JPS6157321U -

Info

Publication number: JPS6157321U
Application number: JP1984142058U
Authority: JP
Priority date: 1984-09-19
Filing date: 1984-09-19
Publication date: 1986-04-17

Description

[Brief explanation of the drawing]

第１図は本考案のデイスクの断面図、第２図ａ
はその基盤の平面図、ｂはその断面図、第３図ａ
はその中板の平面図、ｂはその断面図、第４図と
第５図はその中板の他の実施例の断面図、第６図
と第７図は従来のデイスクの部分断面図を各々表
す。２１……基盤、２２……突起、２３……情報記
録層、２４，３４……孔、３１……中板、３２，
３３……厚肉部、３５……溝部、３６……薄肉部
、５１，５２……接着剤。 Figure 1 is a sectional view of the disk of the present invention, Figure 2a
is a plan view of the base, b is a cross-sectional view, and Figure 3 a
is a plan view of the middle plate, b is a sectional view thereof, FIGS. 4 and 5 are sectional views of other embodiments of the middle plate, and FIGS. 6 and 7 are partial sectional views of a conventional disk. Represent each. 21... Base, 22... Protrusion, 23... Information recording layer, 24, 34... Hole, 31... Intermediate plate, 32,
33...Thick wall part, 35...Groove part, 36...Thin wall part, 51, 52...Adhesive.

Claims

[Scope of Claim for Utility Model Registration] (1) A base made of a material that transmits light, and a middle plate having a thick wall portion and a thin wall portion, the middle plate of the base having a thick wall portion and a thin wall portion. An information recording layer capable of recording information is formed in a portion facing the thin wall portion of the intermediate plate, and the base plate and the thick wall portion of the intermediate plate are in contact with each other, and the base plate and the thick wall portion of the middle plate are in contact with each other. An information recording disk characterized in that the thick portions are formed with engaging portions that can be engaged with each other, and the engaging portions are bonded to each other with an adhesive. (2) The information recording disk according to claim 1, wherein the engaging portion is formed on the outer periphery of the base and the middle plate. (3) The information recording disk according to claim 1 or 2, wherein the engaging portion is formed on the inner periphery of the base and the middle plate. (4) The information recording disk according to claim 1, 2, or 3 of the utility model registration claim, wherein the engaging portion is comprised of an annular continuous protrusion and groove. (5) The information recording disk according to claim 1, 2, 3, or 4 of the utility model registration claim, wherein the protrusion is formed integrally with the base or the middle plate. . (6) Any one of claims 1 to 5 for utility model registration, characterized in that the surface connecting the thick and thin parts of the intermediate plate is formed as an inclined surface or a curved surface. Information recording disk written in crab.