| 摘要 |
PROBLEM TO BE SOLVED: To securely lock an end part of a spiral spring to a housing member without causing an increase of the number of part items, or an extreme increase of machining cost in the case of using the spiral spring having a flat cross section for energizing a vane member in the lead angle direction or a lag angle direction relative to the housing member. SOLUTION: A lock shaft part 43 is provided on a head part of a fastening bolt 11A protruded from a front cover 12, and the end part of the spiral spring 3 is locked to the locking shaft part 43. Since tightening force of the bolt 11A does not reach the end part of the spiral spring 3, deformation is not generated at the end part of the spiral spring 3. The end part of the spiral spring 3 is locked by utilizing the head part of the bolt 11A for coupling a housing main body 5 with the front cover 12 and a rear cover 13, nonconformity such as an increase of the number of part items is not generated.
|
