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Details

Veröffentlichungs-Nr.

EP2876750

Aktenzeichen

EP14194934

Anmeldetag

26. November 2014

Veröffentlichung

26. September 2018

Erteilung

26. September 2018

Rechtsraum

EP

IPC

H01T13/20H01T13/52H01T13/32

Abstract

An ignition plug having a center electrode, a grounding electrode, an insulator, and a metal shell. The center electrode is held by the insulator, and the insulator is held by metal shell. A cavity is formed between the grounding electrode and the center electrode. The grounding electrode is joined to the inner wall surface of the metal shell via a melting portion. In the melting portion, in a predetermined cutting surface MS including a melting deepest point DP and a central axis CX, a percentage ratio MDD of a melting depth MD of the melting portion with respect to a thickness of the grounding electrode is 5% or more, and an area Sm of a portion included in an outer circumferential side of the metal shell is 10% or more of the entire area S.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete