GAS SENSOR

摘要

A gas sensor, which has an insulator including a terminal portion (7) to be connected with the conductor portion of a lead wire, and has the terminal portion clamped between the inner circumference of the insulator and the outer circumference of the connection end. In a gas sensor terminal fixing method, repulsion of the terminal portion is increased by varying the contact point with the inner circumference of the insulator at the terminal portion when the connection end and the insulator are attached. In the terminal structure of the gas sensor, the terminal portion has a first contact part (P1) in contact with the inner circumference of the insulator under free state, an elongating portion (7e) elongating obliquely toward one side in the axial direction to recede from the first contact part, a folding back portion (7d) folded back to the other side in the axial direction at the distal end of the elongating portion on one side in the axial direction, and a second contact part (P5) in contact with the electrode portion obliquely on the other side in the axial direction of the folding back portion.