Patent ID: 6994679
Filing Date: 2006-02-07
Classification: A61H,B06B

Abstract:
1. A massage device, capable of producing vibrating or reciprocating motions for massaging muscles of a person, comprising: a cylindrical shell enclosed at two ends there of by a pair of end plates, an inner wall of said shell being attached with upper, middle and lower sets of magnets of partial annular shape, said magnets being arranged in alternating N and S polarities along the axis of said shell; a central axle coaxially extending along said shell and slightly out of both of said end plates, said central axle being further provided with connecting members at both end and a voice coil at a middle section, said voice coil further including a plurality of grooves for respectively embedding electric brushes, each of said electric brushes being further provided with a brush insulating sleeve for holding one of said electric brush axles, two opposite sides of said voice coil being respectively provided with magnetically permeable plates of partial annular shape; and a pair of conducting electric brush axles extending parallel to said central axle, said electric brush axles being retained on said end plates respectively by screw bolts and insulating sleeves; whereby an electric current flowing into said electric brush axles and said coils mounted thereon will produces a magnetic field interacting with the magnetic field by the magnets, urging the central axle to move in the longitudinal direction, and whereby an alternating current will produce a corresponding reciprocating motion of said central axle, suitable for driving a massage head.