HEATER AND GLOW PLUG PROVIDED WITH SAME

摘要

A heater includes: a resistor having a heat-generating portion; a lead joined to an end portion of the resistor; and an insulating base body covering the resistor and the lead, the lead being made to have a portion whose profile is narrowed toward a distal end on a heat-generating portion side of the lead, a joining portion of the resistor and the lead being a region where the resistor is spaced apart from the insulating base body through the lead as viewed in cross section perpendicular to an axial direction of the lead.