Abstract
In this paper, we have proposed two kinds of magnetic microactuators for a cytology brush built into a capsule endoscope. One is a moving-magnet linear actuator, in which rotational oscillation of a permanent magnet is converted into linear movement through friction. The other is a rotating-magnet actuator with a flexible push-pull wire. Both actuators can be driven by external magnetic field and rub the brush back and forth. As a result of the operation test, they successfully pushed and pulled the brush back and forth along the surface of raw meat. Furthermore, we have added a new function of angular positioning to the capsule by DC magnetic field perpendicular to the magnetic field for rubbing brush.
