| 摘要 |
<p>PURPOSE: To effectively use the inside surface of a main body by transferring a cap at the open end of this main body to the lateral side from outside, removing this cap, inserting a head cylindrical body into the main body from its open end and writing/reading light information to and from a recording medium formed on the inside wall surface of the main body. CONSTITUTION: The main body 10 consists of the cylindrical member 11 which is closed at one end and is opened at the other end and the cap member 12 which closes the open end and is formed with a groove 15 extending radially from the center X on the inside wall surface of an upper bottom 13. Both ends of this groove 15 are both provided with a slope 16 inclining at 45 deg. and a slope 17 having the center running at X-X. These surfaces 16, 17 are formed as reflection mirror surfaces 16, 17 by treatment, such as vapor deposition. A cap taking device 31 holds the cap member 12 from the lower side of this main body 10 and moves the member to another position and thereafter, the device inserts the head cylindrical body H into the main body 10 from the open end of the main body. This cylindrical body H writes/reads the light information to and from the recording medium formed on the inside surface of the cylindrical wall part 14 by the reflection of the mirror surfaces 16, 17. As a result, the inside surface of the wall part 14 is effectively used and the use of various kinds of the heads is made possible.</p> |
