GAS SENSOR AND METHOD FOR MANUFACTURING THE SAME

• Main Author: SHIMIZU KENGO
• Format: Patent
• Language: English; Japanese
• Published: 27.11.2014
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a gas sensor capable of reducing springback in an axial direction of a caulking part to improve caulking force, and a method for manufacturing the same.SOLUTION: A gas sensor 100 comprises at least: a cylindrical main body metal fitting 20 having a caulking part 20a on the own tip side or rear end side; a sensor element 3 extended in an axial direction and held in the main body metal fitting; and an other member 30 fixed to the caulking part. The other member is covered with the caulking part bent inside in a radial direction to press the other member toward a center side of the main body metal fitting in the axial direction, and recesses and protrusions 20u having a vertical interval in the axial direction are formed on at least the outer surface of the caulking part. 【課題】加締め部の軸線方向のスプリングバックを低減し、加締め力を向上させたガスセンサ及びその製造方法を提供する。【解決手段】自身の先端側又は後端側に加締め部２０ａを有する筒状の主体金具２０と、軸線方向に延びて主体金具内に保持されるセンサ素子３と、加締め部に固定される他部材３０とを少なくとも有するガスセンサ１００において、他部材は加締め部に覆われ、加締め部は、径方向内側に曲げられて他部材を主体金具の軸線方向に沿う中央側へ向かって押圧し、加締め部の少なくとも外表面に軸線方向に高低差を有する凹凸２０ｕが形成されている。【選択図】図２