| 摘要 |
PROBLEM TO BE SOLVED: To provide a calking structure for hermetically sealing and supporting against a main metal fitting an element for detecting a gas to be detected within exhaust gas. SOLUTION: This gas sensor has an element 2 disposed in the hollow section 105 of the main metal fitting 1. A gap between the element 2 and the main metal fitting 1 is filled with filling members 3, 4 and 6 so that the element 2 is integrated with and supported by the main metal fitting 1 and attached to an exhaust pipe. A bent section 102 formed at the upper end of the main metal fitting is thermally caulked whereby the filling members 3, 4 and 6 are pressurized to maintain good airtightness. A curved section 101 is provided at the root of the bent section and is formed with a stepped part 116 such that its thickness varies in steps, reducing variations in position of the bent section 101 formed when the curved section is bent by calking. |
