| 摘要 |
PROBLEM TO BE SOLVED: To ensure a sufficient insulation distance between the inner surface of a tube at a tube end part and an inner shaft, in a glow plug formed that a tube to hold in an insulating state a heat generating body to generate heat through energization and the center shaft for energizing a heat generating body at an internal part is securely inserted in a cylindrical mounting fitment having a mounting screw part having an outside size of 8 mm or less. SOLUTION: At an other end 3b of the tube 3 serving as a tube end part, a gap size G between the inside diameter of the tube 3 and the outside diameter of the inner shaft 6 is set to a range of 0.2-0.8 mm.
|
