| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheath heater, a blow plug, and a method of manufacturing the sheath heater capable of securing sufficient connection force of a resistance wire coil 6 to a tip recessed section 5c of a power distribution terminal 5. SOLUTION: This sheath heater 2 includes a cylindrical metallic sheath tube 4 closed at its tip 4a, the power distribution terminal 5 having a tip section 5a inserted to a rear end section of the tube 4, and having the tip recessed section 5c on its tip face, the resistance wire coil 6 having a tip section 6a connected to a tip of the sheath tube 4 and a rear end section 6b fitted to the tip recessed section 5c of the power distribution terminal 5, and insulating powder 7 filled in the sheath tube 4, and is constituted by reducing a diameter of the sheath tube 4 sealed by a sealing member 8, by swaging. An outer peripheral part of the power distribution terminal 5 corresponding to the tip recessed section 5c has a thin section 5i, and a thick section 5d having a thickness more than that of the thin section 5i and projecting outward, and one of an inner diameter of the thin section 5i and an inner diameter of the thick section 5d is smaller than the other in this sheath heater 2. COPYRIGHT: (C)2010,JPO&INPIT |
