JPH0175379U - - Google Patents
Info
- Publication number
- JPH0175379U JPH0175379U JP1987170237U JP17023787U JPH0175379U JP H0175379 U JPH0175379 U JP H0175379U JP 1987170237 U JP1987170237 U JP 1987170237U JP 17023787 U JP17023787 U JP 17023787U JP H0175379 U JPH0175379 U JP H0175379U
- Authority
- JP
- Japan
- Prior art keywords
- sectional
- view
- magnetic disk
- index hole
- detecting
- 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
- 238000007796 conventional method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Optical Transform (AREA)
- Magnetic Record Carriers (AREA)
Description
第１図は本考案の一実施例を示す断面図、第２
図はセンターハブを有する磁気デイスクでの本考
案の実施例を示す断面図、第３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４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５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……センターハブ、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 showing an embodiment of the present invention in a magnetic disk having a center hub, Figure 3 is a cross-sectional view of a conventional method in which disk rotation is detected by an index hole, and Figure 4 is a cross-sectional view of a conventional method in which disk rotation is detected by an index hole. FIG. 5 is a sectional view of a comparative example expanded to include a hole, and is a diagram showing a method for measuring stiffness. 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 hub, 9 ... Load measurement gauge, 10 ... Disc 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170237U JPH0175379U (en) | 1987-11-06 | 1987-11-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170237U JPH0175379U (en) | 1987-11-06 | 1987-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0175379U true JPH0175379U (en) | 1989-05-22 |
Family
ID=31461004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987170237U Pending JPH0175379U (en) | 1987-11-06 | 1987-11-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0175379U (en) |
-
1987
- 1987-11-06 JP JP1987170237U patent/JPH0175379U/ja active Pending