Patent ID: 9387925
Filing Date: 2016-07-12
CPC Classification: B64C,F16F

Claim Text:
1. A vibration reduction device comprising: a frame structure suitable for being coupled to an object of vibration reduction; a first elastic body coupled to a first end of said frame structure, said first elastic body being disposed in said frame structure; a second elastic body coupled to a second end of said frame structure, said second elastic body being disposed in said frame structure; a dynamic mass coupled to said frame structure through said first elastic body and said second elastic body and disposed in said frame structure; a third elastic body; a controllable mass disposed in said dynamic mass and coupled to said dynamic mass through said third elastic body; and an actuator configured to cause said controllable mass to move with respect to said dynamic mass, wherein said actuator includes: a piezoelectric element configured to cause said controllable mass to move; and a piezo-driver configured to apply a voltage to said piezoelectric element such that said controllable mass moves with respect to said dynamic mass, and wherein said piezoelectric element is directly or indirectly joined to said controllable mass.