公开(公告)号：US20210247339A1

公开(公告)日：2021-08-12

申请号：US16972903

申请日：2019-02-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masana OKAI ,  Kouji MATSUO ,  Daisuke TAHIRA

IPC: G01N27/00 ,  G01M15/10

Abstract: A ceramic member unit includes at least insertion members and a ceramic member having insertion sections into which the insertion members are inserted respectively. Each of the insertion sections has at least an insertion opening which opens on a deeper side of an introduction opening in the surface of the ceramic member while communicating with the introduction opening and into which the insertion member can be inserted. The insertion section further has taper hole portions becoming narrower toward the insertion opening in a communication region between the introduction opening and the insertion opening. The taper hole portions are connected to the insertion opening while increasing in a taper angle toward the insertion opening.