| 摘要 |
PURPOSE:To make it possible to detect existence of a record and its size simply and and accurately in the single place, by providing plural record detecting pieces, which are displaced in response to the record, in the same optical detecting means. CONSTITUTION:Sensor pin holder H is installed in a prescribed position on turntable T, and holder H is provided with sensor pis P1 and P2 movably vertically. Springs S1 and S2 for return are provided between holder H and pins P1 and P2, and pins P1 and P2 descend due to force dependent upon the weight of the record to shield the light path of optical detecting means D-PT; and when the record is removed, pins P1 and P2 are returned to release shielding of the light path. |
