Patent ID: 8922313

Claim:
An induction device comprising: a casing; an upward extending projection provided on a bottom of the casing; a support member provided on the bottom of the casing and disposed at an outer side of the projection so as to be positioned between the casing and the projection; a coil retainer; a coil disposed in the casing and retained to the coil retainer such that the coil and the coil retainer are configured as a plate; a screw extending through the coil retainer and fixed within the casing; and a core disposed in the casing so as to contact an inside surface of the casing, wherein the coil extends spirally around the core, the core abuts the projection and the coil retainer is mounted on an upper surface of the support member at the outer side of the projection such that the core and the coil retainer are fixed within the casing separately, the coil is held on at least one surface of opposing surfaces of the coil retainer, and opposite surfaces of the plate are spaced away from the core in a direction perpendicular to the plate.