| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy of a position between an engagement part and an opposite tooth part of a rack.SOLUTION: A rack includes: a rack member (70) having an engagement part for engaging with a lead screw; an opposite tooth part member (40) having an opposite tooth part facing the engagement part across the lead screw; and a positioning mechanism (73a,42a) for positioning a position of the opposite tooth part with respect to the engagement part.SELECTED DRAWING: Figure 4 |
