| 摘要 |
PURPOSE:To record and reproduce signals while containing a disc in a containing case with a simple device, by providing an aligning member and a plate spring pressing the aligning member for the disc center. CONSTITUTION:At storage, the aligning member 3 is pressed downward via a pressing pin 5 with the plate spring 7, a ring shaped stand 14 and the member 3 are sticked closely to be air-tight from the outside. In such construction, at recording and reproduction and loading, first a turntable 30 passes through a hole 16 into the containing case to press the member 3 upward. Then, the member 3 is pressed downward with the spring 7 and upward with the table 30, the member 3 contacts with the table 30 closely, allowing to attain accurate alignment by means of tapers provided for them. Further, the tables 30 goes upward, the member 3 and the stand 14 are separated, the disc 1 is positioned on the center of a space 13, allowing to attain recording and reproduction. Since the table 30 and the member 3 are contacted closely in this case, the accurate transmission of rotation is attained. |
