Dynamic vibration absorber.

摘要

An elliptical inner frame (12a) is supported in a ring-shaped outer frame (10a), as a body of a dynamic vibration absorber, by means of first coil springs (14) which are stretched in an X-direction. A weight (12) is supported in the inner frame (12a) by means of second coil springs (14a, 14a) which are stretched in a Y-direction. Thus, the second coil springs (14a) and the mass of the weight (12) form a Y-direction dynamic vibration absorber unit (22), while the first coil springs (14) and the respective masses of the weight (12) and the inner frame (12a) constitute an X-direction dynamic vibration absorber unit (21).