| 摘要 |
PROBLEM TO BE SOLVED: To make a spacer reliably fixed without complication of attachment work.SOLUTION: A spacer 66 is fixed to an inner sleeve 36 by using a leaf spring 68 that comprises an intermediate part 68A locked to the spacer 66, and a pair of leg piece parts 68B formed by being bent in the same direction at both the ends of the intermediate part 68A and having each tip resiliently engaged with each of two locking holes 56 formed in the inner sleeve 36.SELECTED DRAWING: Figure 8 |
