| 摘要 |
PURPOSE:To prevent flaw or dirt on a recording face by connecting two optical cards each one side has the recording face at one side freely switchingly while the recording face is opposed via a spacer. CONSTITUTION:The optical cards 1, 2 are supported pivotally freely turnably with a bearing supported to a common shaft 3 provided to one side of them and they are arranged while the recording faces 6, 7 are faced inside oppositely. Moreover, a projection 4 with a spacer 8 is provided at the edge of the optical card 2 so as to prevent the recording faces 6, 7 of the optical cards 1, 2 are not in direct contact with each other, the projection 4 is fitted to a hole 5 made to the optical card 1 and the cards 1, 2 are fixed freely removably. In using the optical cards 1, 2, they are used in the open state and the optical cards 1, 2 are folded in case of transportation or carriage to prevent dirt or flaw on the recording face. |
