CONTACT MEMBER FOR GAS SENSOR, GAS SENSOR, RESTRAINING MEMBER, METHOD OF CONNECTING SENSOR ELEMENTS OF GAS SENSOR TO CONTACT MEMBER AND METHOD OF MANUFACTURING GAS SENSOR

摘要

Provided is a gas sensor capable of stably ensuring electrical conduction between a sensor element and a contact member. In a contact member for a gas sensor configured to fix a sensor element by sandwiching the sensor element in an insertion port defined by a pair of housing members to thereby obtain electrical connection with the sensor element, a restraint member provided at an outer circumference of the pair of housing members and having a restraint function for restraining a displacement of the pair of housing members within a predetermined range is used. The restraint member includes: two pressing surface portions to which a compression force that occurs when the annular member shrinkingly deforms is applied; a first side portion coupled perpendicularly to the two pressing surface portions; and a second side portion having an upper side portion coupled perpendicularly to one of the pressing surfaces and a lower side portion coupled perpendicularly to the other of the pressing surfaces, the second side portion also having a spaced portion provided between the upper side portion and the lower side portion. The first side portion has a reaction-force suppressing structure for suppressing occurrence of a reaction force reactive to the compression force.