| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability in a detection of the initial position of a pickup unit by preventing the occurrence of a tooth jump phenomenon at the time of detection of the initial position of the pickup unit, independently of whether a chassis is a synthetic resin mold or made of plating. SOLUTION: A rack 4 of the pickup unit 3 moving along a guide shaft 2 is engaged with a driving pinion 5. The initial position of the pickup unit 3 is detected in such a manner that the pickup unit 3 is moved by a feeding force transmitted to the rack 4 from the driving pinion 5 and this pickup unit 3 collides a stopper 12 of chassis 1 side and stopped. An abutting part 71 is integrally molded on an end part of the rack 4 by the synthetic resin. A space (a) between the abutting part 71 and the guide shaft 2 is smaller than the engagement width B between the rack 4 and the driving pinion 5. COPYRIGHT: (C)2005,JPO&NCIPI
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