| 摘要 |
PROBLEM TO BE SOLVED: To smoothly stop a tray after decelerating the same. SOLUTION: A cam gear 19 is rotated by rotation of a motor 16. As a result, a pin 20a engaged with a cam groove 19a moves along the cam groove 19a according to the rotation of the cam gear 19 and a cam lever 20 rotates. An idle gear 21 attached to the front end of the cam lever 20 rotates as well and an arcuate rack 15a and an arcuate rack 10e move relatively to move the tray 10 with respect to a chassis 15. The moving quantity and moving speed of the tray 10 are determined by the shape of the cam groove 19a. The shape of the cam groove 19a is properly set, by which the speed is decelerated just before the moving of the tray 10 is stopped and thereafter the tray is smoothly stopped.
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