COIL COMPONENT
FIG5 is a front view showing the coil member of FIG3 in a direction B
As shown in FIG5, end portions of the magnetic cores 250 slightly project at the connecting portions of the resin case 3 in the assembled coil members, such that the end surfaces of the magnetic cores 250 can abut each other. The projecting width D is preferably 0.5 mm or less. The reinforcing parts restrict the moving directions of the coil members, and the loose fitting of the connecting parts enables the use of common resin cases without necessitating different resin cases, even when the uneven sizes of the magnetic cores 250 provide different projecting widths D between the coil members, and even when an insulating spacer such as a resin film, a ceramic or oil paper, etc. is placed between the end surfaces of the magnetic cores 250 to constitute a magnetic gap. Also, an annular coil device whose gap may vary from 0 can be easily obtained regardless of a combination of coil members 2a, 2b.
front view
14
receded step
250
magnetic core magnetic cores
13
U-shaped space
['1. A coil device comprising a pair of annularly assembled coil members each comprising a coil arranged on a resin case containing a U-shaped magnetic core; each of said coil members having connecting portions on both end sides of said magnetic core; each of said connecting portions having a connecting part and a reinforcing part; said reinforcing part being constituted by a gap between an inner wall of the resin case and an outer wall of the magnetic core, and a projection plate extending in the assembling direction of the coil members, a projection plate of one coil member being insertable into the gap of the other coil member; and said connecting part comprising a hook-shaped projection extending in said assembling direction and a projection receiver, the hook-shaped projection of one coil member being loosely fittable into the projection receiver of the other coil member.']