JPS63161486U - - Google Patents
Info
- Publication number
- JPS63161486U JPS63161486U JP5427587U JP5427587U JPS63161486U JP S63161486 U JPS63161486 U JP S63161486U JP 5427587 U JP5427587 U JP 5427587U JP 5427587 U JP5427587 U JP 5427587U JP S63161486 U JPS63161486 U JP S63161486U
- Authority
- JP
- Japan
- Prior art keywords
- light
- magnetic tape
- cassette case
- cassette
- polarizing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 2
- 238000002834 transmittance Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Description
第１図乃至第７図は本考案磁気テープカセツト
の実施の一例を示すもので、第１図は要部の斜視
図、第２図は全体の斜視図、第３図は上ハーフを
除いた状態の斜視図、第４図は下ハーフの平面図
、第５図は上ハーフの底面図、第６図は偏光板を
概念的に示すもので、Ａ図は正面図、Ｂ図はＡ図
のＢ―Ｂ線に沿う拡大断面図、第７図は動作を説
明するための概略平面図、第８図及び第９図は本
考案磁気テープカセツトにおける偏光板の変形例
の１を概念的に示すもので、第８図は正面図、第
９図は第８図の―線に沿う拡大断面図、第１
０図及び第１１図は同じく偏光板の変形例の２を
概念的に示すもので、第１０図は正面図、第１１
図は一部を切り欠いて示す斜視図である。
符号の説明、１……磁気テープカセツト、２…
…カセツトケース、１２……光透過孔、１９……
偏光板、２３ａ……テープリール、２３ｂ……テ
ープリール、２８……磁気テープ、３０……光源
、３２……偏光板、３５……偏光板。
Figures 1 to 7 show an example of the implementation of the magnetic tape cassette of the present invention. Figure 1 is a perspective view of the main parts, Figure 2 is a perspective view of the whole, and Figure 3 is a perspective view of the magnetic tape cassette with the upper half removed. A perspective view of the state, Figure 4 is a plan view of the lower half, Figure 5 is a bottom view of the upper half, Figure 6 conceptually shows the polarizing plate, Figure A is a front view, Figure B is Figure A. FIG. 7 is a schematic plan view for explaining the operation, and FIGS. 8 and 9 conceptually show a modified example of the polarizing plate in the magnetic tape cassette of the present invention. Fig. 8 is a front view, Fig. 9 is an enlarged cross-sectional view taken along line - in Fig. 8, and Fig. 1 is a front view.
0 and 11 conceptually show modification example 2 of the polarizing plate, and FIG. 10 is a front view, and FIG.
The figure is a partially cutaway perspective view. Explanation of symbols, 1...Magnetic tape cassette, 2...
...Cassette case, 12...Light transmission hole, 19...
Polarizing plate, 23a... tape reel, 23b... tape reel, 28... magnetic tape, 30... light source, 32... polarizing plate, 35... polarizing plate.
Claims (1)
プリールが回転可能に配置され、カセツトケース
上面にテープリールの少なくとも一部を見透す窓
部が形成された磁気テープカセツトにおいて、 カセツトケースの側面に形成されカセツトケー
ス内に位置した光源からの光を受ける光透過孔内
ないしは該光透過孔に近接して上記光源の方向か
ら直進して来る光の光路に対して角度を有する光
路上を進んで来る光の透過率を著しく減少させる
偏光板を配置した ことを特徴とする磁気テープカセツト。[Scope of Claim for Utility Model Registration] A magnetic tape cassette in which a tape reel wound with magnetic tape is rotatably arranged in a cassette case, and a window is formed on the top surface of the cassette case through which at least a portion of the tape reel can be seen. , an angle relative to the optical path of light traveling straight from the direction of the light source is formed in the light transmission hole formed on the side surface of the cassette case to receive light from the light source located inside the cassette case, or in the vicinity of the light transmission hole. 1. A magnetic tape cassette characterized in that a polarizing plate is arranged to significantly reduce the transmittance of light traveling on an optical path having a polarizing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987054275U JPH0531735Y2 (en) | 1987-04-10 | 1987-04-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987054275U JPH0531735Y2 (en) | 1987-04-10 | 1987-04-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63161486U true JPS63161486U (en) | 1988-10-21 |
| JPH0531735Y2 JPH0531735Y2 (en) | 1993-08-16 |
Family
ID=30881116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987054275U Expired - Lifetime JPH0531735Y2 (en) | 1987-04-10 | 1987-04-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0531735Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023781U (en) * | 1983-07-26 | 1985-02-18 | シチズン時計株式会社 | clock |
-
1987
- 1987-04-10 JP JP1987054275U patent/JPH0531735Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023781U (en) * | 1983-07-26 | 1985-02-18 | シチズン時計株式会社 | clock |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531735Y2 (en) | 1993-08-16 |
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