Patent ID: 6507261
Filing Date: 2003-01-14
Classification: H01F

Abstract:
A coil bobbin for a current transformer, wherein:a coil bobbin (1) is formed, at an outer surface of one of flanges (4) thereof, with a primary coil mounting portion (7) and a primary coil fixing portion (8) so as to protrude outwardly; said primary coil mounting portion (7) and said primary coil fixing portion (8) are formed, at both sides thereof, with through holes (9, 9â€²) through which a pair of legs (3a) of a primary coil 3 for detecting electric current extend, said primary coil fixing portion (8) is formed with a window (12) into which at least one jig is inserted, and a top of said at least one jig (14) is bent in substantially L-shape, a protrusion (14b, 14c, 14d) is formed at the bent portion (14a), the protrusion (14b, 14c, 14d) being formed substantially V-shape; said window (12) is formed with concave fixing portions (12a); each of the legs (3a) of said primary coil (3) is inserted into each of said through holes (9) of said primary coil mounting portion (7), said window (12) and each of said through holes (9â€²) of said primary coil fixing portion (8), respectively; and each of said legs (3a) positioned in said window (12) is urged to be bent by said protrusion (14b, 14c, 14d) of said jig (14) toward each of said fixing portions (12a) to be fixed thereto.