Driving force generating device for use in motor vehicle, has drive unit comprising magnet, and magnet unit comprising another two magnets for covering respective ends of housing, where drive unit is movable between two positions

摘要

The device has a tubular housing (10) comprising two ends (101, 102) facing each other in a longitudinal direction, and a drive unit (40) arranged in the housing in a movable manner. The drive unit has a magnet (41) and is movable between two positions with respect to the housing. A magnet unit (20) has two magnets (21, 22) for covering respective ends of the housing. A polarity of a magnetic field of the magnets of the drive unit or the magnet unit is reversed, when the drive unit is moved between the positions.