| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the weight of the entire gas sensor by thinning a polygonal section 36 for screwing in a body 3 without causing instability in screwing work and without any sealing failure after screwing. <P>SOLUTION: In the gas sensor in which a detection element is fixed into a cylindrical fixture body 3, the body 3 has an external thread 34a for mounting to a screw hole N in an exhaust pipe H on the outer-periphery surface. The body 3 is located at the rear of the rear end of the external thread 34a for mounting, is a polygonal section 36 for engaging a screwed tool, and has an annular sealing seat surface 37a on a surface 36a facing the tip. The sealing seat surface 37 is allowed to remain in the polygonal section 36, a rearward surface 36b on a side opposite to the seat surface 37 is notched excluding each corner section 36k on the outer-periphery surface of the polygonal section 36, and a recess 40 is provided. The body 3 becomes lighter by the amount of providing the recess 40. <P>COPYRIGHT: (C)2007,JPO&INPIT |
