| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation dial device of a ventilator which can realize a favorable feeling of operation for the long term, and reduce manufacturing costs. SOLUTION: An attachment receiving part 45 is formed integrally with the case body 11 of the ventilator 10, and a bushing 44 is formed separately from the attachment receiving part 45 and a dial body 43. Then the bushing 44 is formed by a polyacetal resin which has larger elasticity than the resin constituting the attachment receiving part 45, and which has minor change in characteristics with the elapse of time. Then an engagement piece 44e projected from the bushing 44 is inserted into an axial hole 45c of the attachment receiving part 45, and an engagement part 44f is engaged with an engagement surface 45e, thus the bushing 44 is attached to the attachment receiving part 45. Then the dial body 43 is pressed against a sliding contact part 45g by the bushing 44, and a sliding torque is obtained. Then an abutting part 44h projected from the engagement piece 44e is brought into contact with the inner surface of the axial hole 45c, and rattling can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
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