Patent ID: 9595814
Date: 2017-03-14
CPC Classifications: F02P,H01T

Claim:
1. A spark plug comprising: an insulator having a through hole extending in a direction of an axial line; a center electrode, at least a part of which is inserted into a leading end side of the through hole; a terminal metal fixture, at least a part of which is inserted into a rear end side of the through hole; and a connection portion connecting the center electrode and the terminal metal fixture together in the through hole, wherein the connection portion includes: wherein, among the resistor and the magnetic substance structure, when a member disposed on a leading end side is defined as a first member and a member disposed on a rear end side is defined as a second member, the connection portion further includes: wherein the magnetic substance structure contains: wherein, in a cross-section of the magnetic substance structure including the axial line, when a target region is defined as a rectangular region having the axial line as a center line, a side of 1.5 mm in a direction perpendicular to the axial line, and a side of 2.0 mm in the direction of the axial line,