| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a method for fixing a pickup using a fixing component during transportation that causes the increase in the number of components and the deterioration of operability, and causes a misuse in a state where the pickup is fixed. SOLUTION: An opposed wall surface 10 is formed, facing opposite to a rack wall surface on which the rack 6 of a rack member 7 is formed, in the rack member 7 close to a pinion gear 9. The pinion gear 9 is disposed between the rack wall surface and the opposed wall surface 10, to regulate the displacement in the direction where the engagement of the pinion gear 9 with the rack 6 deviates. Thereby, the disengagement of the rack 6 with the pinion gear 9 is prevented when impact is given, and damages to the pickup 9 and the driving mechanism of the pickup 9 is prevented by displacing the pickup 5 along guide shafts 3 and 4 vigorously to an edge, at the time of giving the impact.
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