Coil bobbin and winding jig for use in forming a wound coil and method of winding a wire on the coil bobbin

摘要

In a coil bobbin for use in forming a wound coil, a plurality of open portions are made to at least one of a first and a second flange which are outwardly extended from both axial ends of a tubular portion, respectively. The first and the second flange portions define a coil- placing region therebetween for placing the wound coil. The open portions permits insertion into the coil-placing region of an adjusting arrangement which is for adjusting an effective size of the coil-placing region in an axial direction of the tubular portion.