| 摘要 |
A reciprocatory dry shaver comprises a stationary cutter (21), a movable cutter (22), and a permanent-magnet linear motor (50) having a stator (51) and a reciprocator (61,62) which is driven by an electric current to reciprocate relative to the stator (51). The reciprocator (61,62) carries the movable cutter (22) to reciprocate it in shearing engagement with the stationary cutter (21). A power circuit (2) is included to provided an electric power to the motor (50). The shaver includes a detector (83) which detects a displacement of the movable cutter (22) and give an output indicative of the detected displacement of the movable cutter (22). Also included in the shaver is a controller (100) which varies the electric power being fed to the motor (50) in a feedback manner based upon the output from the speed detector (83) in order to keep an oscillation amplitude of the movable cutter (22) at constant. In this manner, the movable cutter (22) can reciprocate without being jammed even when experiencing a heavy load during the shaving, thereby avoiding undesired speed reduction of the movable cutter (22) which would result in the lowering of the cutting efficiency. Thus, the reciprocatory dry shaver is capable of keeping a constant oscillation amplitude irrespective of a load acting on a movable cutter (22) to thereby assure a sharp cut even when the movable cutter experiences a heavy load during the shaving. <IMAGE> |
