| 摘要 |
A disk player compatible with two types of large and small diameter disks is provided. A startup arm 20 is transversely moved by a selection arm 50 turned by abutment of a side edge of a large diameter disk 14b. Then, the startup arm 20 turning together with a shift bar 17 moved to be pushed at the front edge of the disk 14b is longitudinally moved. A cam follower pin 25 is engagingly locked with a pocket 53c by a spring 24, and the startup arm 20 is constrained in cooperation with a swivel shaft 22, whereby the shift bar 17 is restricted, and the center of the large diameter disk is positioned. The small diameter disk 14a restricts the shift bar 17 by the startup arm 20 by which the cam follower pin 25 is engagingly locked with the pocket 43c by the spring 24 irrespective of the selection arm 50. The center of the small diameter disk is positioned at the same central position as that of the large diameter disk.
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