Patent ID: 11898881
Assignee: NGK INSULATORS, LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A protective cover that protects a distal end portion of a sensor element held by a casing, the protective cover comprising:
an inner member disposed in the casing so as to surround the distal end portion of the sensor element; and
an outer member disposed in the casing so as to cover the distal end portion of the sensor element and the inner member, wherein
the protective cover is formed by fitting the inner member and the outer member to each other by press fitting,
the inner member and the outer member are connected by being fitted to each other,
the outer member is connected to a side surface of the casing,
the inner member is connected to the side surface of the casing, and
a connection portion between the outer member and the side surface of the casing is fixed by welding.