JPS6452164U

JPS6452164U -

Info

Publication number: JPS6452164U
Application number: JP14557187U
Authority: JP
Priority date: 1987-09-24
Filing date: 1987-09-24
Publication date: 1989-03-30

Description

[Brief explanation of the drawing]

第１図、第２図はこの考案に係るフレキシブル
デイスク装置の一実施例を示す図であり、第１図
はフレキシブルデイスクの駆動状態を示す図、第
２図はその駆動状態を光学的に検出する電気回路
図、第３図乃至第６図は従来のフレキシブルデイ
スク装置を示す図であり、第３図は周知のフレキ
シブルデイスクを示す平面図、第４図はフレキシ
ブルデイスクの駆動状態を示す図、第５図は第４
図の駆動状態を光学的に検出する電気回路図、第
６図は第５図の動作を説明するための波形図であ
り、図において１はフレキシブルデイスク、４は
インデイツクスホール、６はモータ、７はコレツ
ト、８は発光素子、９は受光素子、１５はコンパ
レータ、１６は第２の発光素子、１７は第２の受
光素子、２１は増幅器、ｂ，ｅは基準値である。
なお、各図中同一符号は同一または相当部分を示
す。 1 and 2 are diagrams showing an embodiment of the flexible disk device according to this invention, FIG. 1 is a diagram showing the driving state of the flexible disk, and FIG. 2 is a diagram showing the driving state optically. 3 to 6 are diagrams showing a conventional flexible disk device, FIG. 3 is a plan view showing a well-known flexible disk, and FIG. 4 is a diagram showing a driving state of the flexible disk. Figure 5 is the 4th
6 is a waveform diagram for explaining the operation of FIG. 5. In the figure, 1 is a flexible disk, 4 is an index hole, 6 is a motor, 7 is a collet, 8 is a light emitting element, 9 is a light receiving element, 15 is a comparator, 16 is a second light emitting element, 17 is a second light receiving element, 21 is an amplifier, and b and e are reference values.
Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

They are placed opposite each other with a flexible disk in between.
A flexible disk device having a light emitting element and a light receiving element that transmit and receive light through an index hole provided in the flexible disk, and a comparator that compares the output of the light receiving element with a reference value, which is connected in series with the light emitting element. a second light-emitting element that faces the second light-emitting element with the flexible disk in between, but is disposed at a position not facing the index hole; 1. A flexible disk device comprising: an amplifier that amplifies the difference between an output and a reference value; and the amount of light emitted from the light emitting element is controlled by the output of the amplifier.