| 摘要 |
PURPOSE:To improve assembly feasibility and carry out mass production by manufacturing and assembling a sensor body, casing and a gas sealing device individually and housing the body in the casing and sealing in a final processing stage. CONSTITUTION:A sensor body A is composed of a cup-shaped holder part 21, a true cylindrical part 22 and a neck part 23 connected to the former. The nose of the cylindrical part 22 is clogged by a terminal plate 24 and inside the cylindrical part, a straight internal flow channel 25 is formed. The casing B housing the body A has a cylindrical barrel 40, part of which is clogged by a terminal plate 40. The gas sealing device 60 has a metallic hermitic seal base 61 and this base 61 has the same ring form as a flange 45 on the casing 40. This body A, the casing B and the sealing device C are independently fabricated and assembled, and the body A is housed in the barrel 40 of the casing B. The casing and the seal base are bonded together by means of projection welding. |
