公开(公告)号：US12247944B2

公开(公告)日：2025-03-11

申请号：US17769575

申请日：2020-09-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Sunchao Liu ,  Kazuhiro Kouzaki ,  Takehiro Oba ,  Motohiko Nakamura ,  Kenji Masuda

IPC: G01N27/407 ,  G01N33/00

Abstract: A gas sensor (1) including a sensor element (10); a metallic shell (138); a tubular outer surface member (190) attached directly or indirectly to the metallic shell, constitutes an outer surface of the gas sensor, and extends toward a rear end side in relation to the metallic shell; and a tubular protection member (210, 220) which is detachably fixed to a fixation region C1, C2 of an outer circumference of the outer surface member. The protection member includes a first arc portion (212), a second arc portion (222), and a fixation portion (214,224) brought into contact with and is fixed to the fixation region. When the protection member fixed to the outer circumference of the outer surface member by fixing the fixation portion to the fixation region is viewed in the axial O direction, the first arc portion and the second arc portion cover in total at least 90% of the entire circumference of the outer surface of the outer surface member.