Patent ID: 7631539
Filing Date: 2009-12-15
Classification: G01N

Abstract:
1. A method of producing a gas sensor having a sensor element extending in an axial direction and having a front end side to face a measured gas, a metallic housing holding therein the sensor element, a tubular metallic member provided to a rear end side of the metallic housing, at least one lead wire extending from an inside to an outside of the tubular metallic member and having a conductor wire electrically connected to the sensor element and an insulating film covering the conductor wire, and an elastic seal member having a lead wire insertion hole into which the lead wire is inserted, the method comprising: a disposition step of preparing the elastic seal member having a main body portion and a smaller diameter portion smaller in outer diameter than the main body portion, disposing the entire main body portion and a part of the smaller diameter portion inside the tubular metallic member and allowing a remaining part of the smaller diameter portion to protrude outward from a rear end of the tubular metallic member, wherein the at least one wore extends through the smaller diameter portion of the elastic seal member; and a crimping step of crimping at least a portion of the tubular metallic member radially inward and thereby compressively deforming the elastic seal member.