JPH0175372U - - Google Patents
Info
- Publication number
- JPH0175372U JPH0175372U JP1987168781U JP16878187U JPH0175372U JP H0175372 U JPH0175372 U JP H0175372U JP 1987168781 U JP1987168781 U JP 1987168781U JP 16878187 U JP16878187 U JP 16878187U JP H0175372 U JPH0175372 U JP H0175372U
- Authority
- JP
- Japan
- Prior art keywords
- center hole
- attached
- detecting
- hole
- film
- 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
- 238000002834 transmittance Methods 0.000 claims description 2
- 239000012779 reinforcing material Substances 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Description
第１図は本考案の一実施例を示す断面図、第２
図は従来のデイスク回転をインデツクスホールに
より検出する従来方式の断面図、第３図は貼付フ
イルムをセンターホールにまで広げた比較例の断
面図、第４図はステイフネスの測定方法を示す図
である。
１……磁気デイスク、２……光透過率の小さい
フイルム、３……センターホール、４……インデ
ツクスホール、５……発光ダイオード、６……フ
オトセンサー、７……デイスクドライブのクラン
プ、８…センターホール補強材、９……負荷測定
ゲージ、１０……デイスク保持用チヤツク。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a cross-sectional view of a conventional method for detecting disk rotation using an index hole, Figure 3 is a cross-sectional view of a comparative example in which the pasted film is extended to the center hole, and Figure 4 is a diagram showing a stiffness measurement method. be. 1... Magnetic disk, 2... Film with low light transmittance, 3... Center hole, 4... Index hole, 5... Light emitting diode, 6... Photo sensor, 7... Clamp for disk drive, 8 ... Center hole reinforcement material, 9 ... Load measurement gauge, 10 ... Disk holding chuck.
Claims (1)
ツクスホールを含む内周部分に光透過率の小さな
フイルムを貼付け、さらにセンターホールの周囲
にセンターホール補強材を貼付けたことを特徴と
する磁気デイスク。 A magnetic disk characterized in that a film with low light transmittance is attached to the inner circumference including an index hole for detecting rotation by detecting light, and a center hole reinforcing material is attached around the center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168781U JPH0175372U (en) | 1987-11-04 | 1987-11-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168781U JPH0175372U (en) | 1987-11-04 | 1987-11-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0175372U true JPH0175372U (en) | 1989-05-22 |
Family
ID=31458261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987168781U Pending JPH0175372U (en) | 1987-11-04 | 1987-11-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0175372U (en) |
-
1987
- 1987-11-04 JP JP1987168781U patent/JPH0175372U/ja active Pending
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