JPH025186U

JPH025186U -

Info

Publication number: JPH025186U
Application number: JP7948788U
Authority: JP
Priority date: 1988-06-17
Filing date: 1988-06-17
Publication date: 1990-01-12

Description

[Brief explanation of drawings]

第１図はケース内部を示す平面図、第２図は第
１図−線の拡大縦断面図、第３図は分離状態
の斜面図、第４図は他の実施例の分離状態斜面図
、第５図はさらに他の実施例の斜視図である。１……記録坦体、２……ケース、３……可視部
、４……回折格子縞、５……シート、６……ハブ
。 FIG. 1 is a plan view showing the inside of the case, FIG. 2 is an enlarged longitudinal cross-sectional view along the line shown in FIG. 1, FIG. 3 is a slope view in a separated state, and FIG. FIG. 5 is a perspective view of yet another embodiment. DESCRIPTION OF SYMBOLS 1... Recording carrier, 2... Case, 3... Visible part, 4... Diffraction grating stripes, 5... Sheet, 6... Hub.

Claims

[Scope of Claim for Utility Model Registration] (1) In a cassette in which a case 2 containing a recording medium 1 such as a tape or a disk is provided with a transparent or translucent visible part 3, an internal structure of the case corresponding to the visible part 3. A cassette characterized in that the cassette is provided with diffraction grating stripes 4 that cause color tone changes due to diffraction. (2) The diffraction grating fringes 4 have a pitch of 0.5 to 5μ.
2. The cassette according to claim 1, wherein the cassette has a depth of 200 to 3000 Å. (3) The cassette according to claim 1 or 2, wherein the internal structure of the case is an inner wall surface of the case, a sheet 5, a liner, or a hub installed inside the case 2. (4) Claims 1 and 2, wherein the diffraction grating stripes 4 are formed into patterns, letters, designs, or symbols.
or the cassette described in 3.