| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas sensor enhanced in corrosion resistance by eliminating the gap of the welded part of a main metal fitting and an outer cylinder. <P>SOLUTION: The gas sensor 1 is equipped with: a detection element 10, extending in an axial direction O and having a detection part 11 provided to its leading end; a main metal fitting 50 for holding the detection element in the state of being inserted through its inside so as to protrude the detection part, and an outer cylinder 65, connected to the main metal fitting so as to surround the outer periphery of the rear end part 57 of the main metal fitting and housing the rear-end side of the detection element therein. A caulking part 67 for caulking only the leading end part 65a of the outer cylinder from the outer peripheral side thereof is formed, and a welded part 99 liquid-tight over its whole periphery so as to straddle the leading end part of the outer cylinder and the main metal fitting is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
