JPS6448763U - - Google Patents
Info
- Publication number
- JPS6448763U JPS6448763U JP1987143930U JP14393087U JPS6448763U JP S6448763 U JPS6448763 U JP S6448763U JP 1987143930 U JP1987143930 U JP 1987143930U JP 14393087 U JP14393087 U JP 14393087U JP S6448763 U JPS6448763 U JP S6448763U
- Authority
- JP
- Japan
- Prior art keywords
- holder
- substrate
- magnetic
- optical information
- information recording
- 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
- 239000000758 substrate Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 3
- 239000000463 material Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
第１図は本考案の一実施例を説明するための断
面図、第２図は本考案の他の実施例を説明するた
めの断面図、第３図は本考案のさらに他の実施例
を説明するための断面図、第４図は従来例を説明
するための断面図である。
１，２……基板、３，４……中心孔、５……ホ
ルダ、６……突部、７……スピンドル孔、８……
磁性吸着部材、９……信号パターン。
Fig. 1 is a cross-sectional view for explaining one embodiment of the present invention, Fig. 2 is a cross-sectional view for explaining another embodiment of the present invention, and Fig. 3 is a cross-sectional view for explaining another embodiment of the present invention. FIG. 4 is a cross-sectional view for explaining a conventional example. 1, 2...Substrate, 3, 4...Center hole, 5...Holder, 6...Protrusion, 7...Spindle hole, 8...
Magnetic adsorption member, 9...signal pattern.
Claims (1)
板と、この基板の内周部に固着されたホルダと、
このホルダに保持された磁性吸着部材とを備え、
この磁性吸着部材に対する磁気的吸引力を利用し
て記録再生装置のターンテーブル上にクランプさ
れるマグネチツククランプ用光情報記録デイスク
において、上記ホルダを上記基板と熱膨脹率が略
等しい材料にて形成するとともに、このホルダに
上記基板の中心孔に嵌合する突部を設けたことを
特徴とするマグネチツククランプ用光情報記録デ
イスク。 (2) 実用新案登録請求の範囲第(1)項の記載にお
いて、上記ホルダの突部を、その外周面が傾斜し
た先細り形状に形成したことを特徴とするマグネ
チツククランプ用光情報記録デイスク。[Claims for Utility Model Registration] (1) A substrate formed in the shape of a disk and having a center hole, a holder fixed to the inner circumference of the substrate,
and a magnetic adsorption member held in this holder.
In an optical information recording disk for magnetic clamping that is clamped on a turntable of a recording/reproducing device using the magnetic attraction force to the magnetic attraction member, the holder is formed of a material having a coefficient of thermal expansion substantially equal to that of the substrate. An optical information recording disk for a magnetic clamp, characterized in that the holder is provided with a protrusion that fits into the center hole of the substrate. (2) The optical information recording disk for a magnetic clamp as set forth in claim (1) of the utility model registration, characterized in that the protrusion of the holder is formed into a tapered shape with an inclined outer peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987143930U JPS6448763U (en) | 1987-09-22 | 1987-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987143930U JPS6448763U (en) | 1987-09-22 | 1987-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448763U true JPS6448763U (en) | 1989-03-27 |
Family
ID=31411192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987143930U Pending JPS6448763U (en) | 1987-09-22 | 1987-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448763U (en) |
-
1987
- 1987-09-22 JP JP1987143930U patent/JPS6448763U/ja active Pending
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