2results about How to "Reduce yaw" patented technology

The application discloses a double-cone DNA chain-shaped magnetic micro-robot structure and a driving method. The micro-robot comprises a chain-shaped main body extending along a central axis, the chain-shaped main body is composed of two spiral main chains and a transverse connection sequence, the transverse connection sequence connects the two spiral main chains into a DNA chain-shaped structure, and an envelope circumscribing the micro-robot main body structure is double-cone-shaped. A magnetic functional layer and a biocompatible layer are sputtered on the outer surface of the micro-robot in sequence. The magnetic functional layer is magnetized to form a fixed magnetization direction with a preset misalignment angle with the central axis, so that the micro-robot can realize spiral propulsion under the action of an externally applied uniform rotating magnetic field. The propulsion direction can be switched by changing the rotating axis angle of the rotating magnetic field, so that the tail part can be used as the head part for propulsion in the return process, and the whole turning operation is avoided. The structure takes into account the drag reduction and attitude stability, and is suitable for micro-fluidic control and biomedical scenes.

The utility model is suitable for the technical field of stirring rod, provides a kind of stirring rod of cylindrical pin fixed, including stirring shaft, stirring head and cylindrical pin;Through the insertion hole being set on the stirring shaft, the stirring head is arranged in the insertion hole;Positioning slot is equipped on the stirring head;Through the pin hole being further set on the stirring shaft, the axis of pin hole and the axis of insertion hole are perpendicular intersection, and the pin hole is located in the tangent direction of insertion hole;The cylindrical pin is arranged in the pin hole, and the positioning slot of the stirring head is formed with the joint cooperation of carding.The cylindrical pin includes straight rod section at both ends and deformation section at middle part;The cylindrical pin and pin hole are initially gap fit, and plastic deformation is caused by exerting external force to deformation section during assembly, so that the cylindrical pin and pin hole form interference fit.The utility model solves the problem that the traditional stirring shaft and stirring head welding fixed lead to unstable operation of stirring shaft, cannot replace wear and tear stirring head alone.