JPS623670U - - Google Patents
Info
- Publication number
- JPS623670U JPS623670U JP9266885U JP9266885U JPS623670U JP S623670 U JPS623670 U JP S623670U JP 9266885 U JP9266885 U JP 9266885U JP 9266885 U JP9266885 U JP 9266885U JP S623670 U JPS623670 U JP S623670U
- Authority
- JP
- Japan
- Prior art keywords
- detector
- recording medium
- prohibiting
- erasure prevention
- disc
- 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
- 230000002265 prevention Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は誤消去防止シールの貼付されたデイス
クの平面図、第２図は判別回路の回路ブロツク図
、第３図は光磁気デイスクの平面図である。第４
図、第６図は他の実施例のデイスクを示す平面図
、第５図は他の実施例の判別回路を示す回路ブロ
ツク図である。
１……デイスク状記録媒体、５……誤消去防止
シール、６……検出器。
FIG. 1 is a plan view of a disk to which an erroneous erasure prevention sticker is attached, FIG. 2 is a circuit block diagram of a discrimination circuit, and FIG. 3 is a plan view of a magneto-optical disk. Fourth
6 is a plan view showing a disk of another embodiment, and FIG. 5 is a circuit block diagram showing a discrimination circuit of another embodiment. 1... Disc-shaped recording medium, 5... Accidental erasure prevention sticker, 6... Detector.
Claims (1)
反射率を異ならしめる誤消去防止標識手段と、前
記デイスク状記録媒体が装着された状態で反射率
の異なる部分に対応する位置に設けられた発光部
と受光部を有する検出器と、該検出器出力に応じ
て記録装置の記録状態を禁止する禁止手段とより
なる誤消去防止装置。 Erroneous erasure prevention marking means for changing the light reflectance of a part of a rewritable disc-shaped recording medium, and light emitting means provided at positions corresponding to the parts having different reflectances when the disc-shaped recording medium is mounted. 1. An accidental erasure prevention device comprising: a detector having a light receiving section; and a prohibiting means for prohibiting a recording state of a recording device according to the output of the detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9266885U JPS623670U (en) | 1985-06-19 | 1985-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9266885U JPS623670U (en) | 1985-06-19 | 1985-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS623670U true JPS623670U (en) | 1987-01-10 |
Family
ID=30649671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9266885U Pending JPS623670U (en) | 1985-06-19 | 1985-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS623670U (en) |
-
1985
- 1985-06-19 JP JP9266885U patent/JPS623670U/ja active Pending
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