| 摘要 |
PURPOSE: To attain prevention of moisture invasion, and complete assembly by fitting a sleeve filled with a primary ignition powder with an ignition powder formed at a base point surrounded, covering the sleeve and a base with aluminum two-stage cylindrical portions, and fitting secondary ignition powder to the front end part. CONSTITUTION: An ignition powder 10 is formed at the front end of a base 1 so as to be capable of being ignited with a connection pan 13. A synthetic resin sleeve 2 filled with a primary ignition powder 11 so as to surround the ignition powder 10 is fitted to the groove part of the base 1 through a thick- walled edge 14. The sleeve 2 and the base 1 are covered by an jacket 3 which involves two-stage cylindrical portions 3a, 3b made of aluminum, and it is fitted at a housing 5 with an O-ring 15 and a fixing means 4. An window part 12 is formed at the front end part of the jacket 3, and at its further front end, a secondary ignition powder 7 is fitted through an insulating sleeve 8. It is thus possible to effectively-prevent moisture from invading an ignition powder and powder storage part, and obtain a complete assembling structure. |
