Patent ID: 8487731
Filing Date: 2013-07-16
Classification: H01F,H01Q

Abstract:
1. A magnetic element comprising: a core made of a magnetic material; and a base made of resin that is integrally formed with an end surface of the core without using an adhesive by insert molding involving filling an insert molding die with a molten resin and stiffening the resin under a state in which at least one end portion of the core is arranged in the insert molding die; wherein the core comprises a recess or a protrusion provided on an end surface of the end portion; an inner surface of the recess or an outer surface of the protrusion is formed so as to be parallel to a center axis of the core; a length of a part of the recess that is recessed inward from the end surface of the core to which the base is fixed is formed to be shorter than a length of the base from an end surface on a side that is fixed to the core to a part of the recess that contacts with the end surface; and a length from a tip of the protrusion to the end surface of the core is formed to be shorter than a length from an end surface of the base on a side that is fixed to the core to a part that comes in contact with the tip of the protrusion.