| 摘要 |
PROBLEM TO BE SOLVED: To provide an igniting part for an electric detonator, capable of preventing accidental explosion due to electrostatic induction or the damage of electric bridge wires due to loading pressure of igniting charge surely, and further, capable of being manufactured easily. SOLUTION: The bottom surface of a spot facing 24 of an insulating body 2 made of ceramics is connected to the rear surface of inflated head 32 of a lead pin 3 through a connecting material and a gap between them is sealed while the inwardly projected flange 11 of a metallic tube 1 is connected to the other end surface 22 of the insulating body 2 made of ceramics through a connecting material and a gap between them is sealed respectively. A step between the other end surface 111 of the metallic tube 1 and the flat end surface 21 of the insulating body 2 made of ceramics as well as a step between the feat end surface 21 of the insulating body 2 and the surface 321 of inflated head of the lead pin 3 are specified so as to be not more than 100μm or preferably not more than 50μm.
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