JPH0472329U - - Google Patents
Info
- Publication number
- JPH0472329U JPH0472329U JP11437290U JP11437290U JPH0472329U JP H0472329 U JPH0472329 U JP H0472329U JP 11437290 U JP11437290 U JP 11437290U JP 11437290 U JP11437290 U JP 11437290U JP H0472329 U JPH0472329 U JP H0472329U
- Authority
- JP
- Japan
- Prior art keywords
- inclined surface
- degrees
- detection prism
- extending
- optical
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 2
Landscapes
- Mechanical Optical Scanning Systems (AREA)
Description
第１図は本考案による光学式終端検出用プリズ
ムの一例の構成図、第２図はその動作の説明のた
めの線図、第３図はその成型の説明のための線図
、第４図は他の例の構成図、第５図、第６図はテ
ープカセツトを説明するための構成図、第７図は
従来の光学式終端検出用プリズムの構成図、第８
図はその成型の説明のための線図、第９図はその
動作の説明のための線図である。
１はカセツト匣体、２０はプリズム全体、２１
は第１の部分、２１ａは端面、２２は第１の傾斜
面、２３は第２の部分、２３ａは面、２３ｂは背
面、２４は第２の傾斜面、３０はテープレコーダ
本体、３１は発光素子、３２は受光素子、４１は
主金型、４２，４３はスライド金型、Ｔは磁気テ
ープである。
Fig. 1 is a configuration diagram of an example of the optical end detection prism according to the present invention, Fig. 2 is a line diagram for explaining its operation, Fig. 3 is a line diagram for explaining its molding, and Fig. 4 is a configuration diagram of another example, FIGS. 5 and 6 are configuration diagrams for explaining a tape cassette, FIG. 7 is a configuration diagram of a conventional optical end detection prism, and FIG.
The figure is a diagram for explaining the molding, and FIG. 9 is a diagram for explaining the operation. 1 is the cassette case, 20 is the entire prism, 21
21a is the end surface, 22 is the first inclined surface, 23 is the second portion, 23a is the surface, 23b is the back surface, 24 is the second inclined surface, 30 is the tape recorder main body, 31 is the light emitting 32 is a light receiving element, 41 is a main mold, 42 and 43 are slide molds, and T is a magnetic tape.
Claims (1)
と、 この第１の部分から延長して設けられる４５度
角の第１の傾斜面を介して上記カセツト匣体に鉛
直に形成される第２の部分とから成り、 この第２の部分から延長して４５度角の第２の
傾斜面が設けられ、 一方の面から入射される光線を上記第１及び第
２の傾斜面で反射して同じ一方の面側に出射する
ようにされた光学式終端検出用プリズムにおいて
、 上記第２の部分の少なくとも上記第２の傾斜面
に連続する背面に外乱光を遮断する表面処理を施
すようにした光学式終端検出用プリズム。[Claims for Utility Model Registration] A first portion formed in close contact with the cassette case; and a first inclined surface extending from the first portion at an angle of 45 degrees. A second portion is formed perpendicularly to the body, and a second sloped surface of 45 degrees is provided extending from the second portion, and the light beam incident from one surface is directed to the first and second portions. In an optical termination detection prism configured to reflect on a second inclined surface and emit to the same one side, disturbance light is transmitted to at least a rear surface of the second portion that is continuous with the second inclined surface. An optical end detection prism that has a surface treatment that blocks it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11437290U JPH0472329U (en) | 1990-10-31 | 1990-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11437290U JPH0472329U (en) | 1990-10-31 | 1990-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0472329U true JPH0472329U (en) | 1992-06-25 |
Family
ID=31862048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11437290U Pending JPH0472329U (en) | 1990-10-31 | 1990-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0472329U (en) |
-
1990
- 1990-10-31 JP JP11437290U patent/JPH0472329U/ja active Pending
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