Patent ID: 7294941

Claim:
A reciprocating motor comprising: an outer stator; an inner stator arranged at an inner circumference surface of the outer stator with a certain air gap; a magnet linearly and movably arranged between the outer stator and the inner stator; and a winding coil mounted on either the outer stator or the inner stator, the winding coil having a ring shape and including: a plurality of turns of a conductive wire; a polyester imide layer surrounding the conductive wire; a polyamide imide layer surrounding the polyester imide layer; a self-lubricating polyamide layer surrounding the polyester imide layer; and a molding material surrounding the self-lubricating polyamide layer such that the conductive wire, the polyester imide layer, the polyamide imide layer, the self-lubricating polyamide layer and the molding material together are an integral structure, the self-lubricating polyamide layer being located between the conductive wire and the molding material.