RESONATOR

PROBLEM TO BE SOLVED: To easily and rigidly attach a resonator, which is designed to be disposed in the air chamber of a tire for reducing a noise generated due to resonance, to a wheel in an engaging manner.SOLUTION: The resonator 12 includes a sub-air-chamber 45 and locking pieces 48 on both the sides of the sub-air-chamber 45 which are formed by overlapping a first cover body 41 and a second cover body 42. The locking piece 48 on one side is formed by overlapping a first locking piece 61 protruding from the first cover body 41 and a second locking piece 62 protruding from the second cover body 42. The locking piece 48 on the other side is formed with a third locking piece 63 protruding from the second cover body 42. The third locking piece 63 is engaged with a locking receiver 37 on the other side to push one side of the resonator 12. By this manner, the first locking piece 61 and the second locking piece 62 on the one side are each independently deformed to be easily locked in the locking receiver 37 on the one side.