Webb Ziesenheim Logsdon Orkin & Hanson, P.C.
Swinging mechanism for a toy to simulate tail movement of an aquatic animal
 A swinging mechanism for a toy includes a speed-reduction gear assembly driven by a motor, a linkage, a pair of swing blade units, and an eccentric unit. The speed-reduction gear assembly has a drive gear and a driven gear. The linkage has an actuating link and a carrier link. The carrier link has a turning axis between two opposite ends thereof. The actuating link has an end fixed to the carrier link adjacent to the turning axis. Each of the swing blade units has at least an inner blade and an outer blade hinged to one another. The inner blades of the swing blade units have inner ends connected pivotally and respectively to the two opposite ends of the carrier link. The outer blades of the swing blade units are juxtaposed side by side and have outer ends connected pivotally to one another. The inner and outer blades of the swing blade units have adjoining ends between the inner and outer ends, and hinge pins which interconnect the adjoining ends, respectively. The hinge pins are parallel to the turning axis of the carrier link. The eccentric unit interconnects the driven gear and the actuating link for turning the carrier link by rocking the actuating link so as to pull one of the inner blades inward while pushing the other one of the inner blades outward, thereby simultaneously turning the outer blades to and fro about the hinge pins. 
A A
A63H A63H
inventional inventional
Chin-Der
Chang