Patent ID: 7581879

Claim:
A temperature sensor comprising: a temperature-sensitive element having an electric characteristic that varies with temperature; a sheath member extending in an axial direction and having a metal core wire connected at a tip end thereof to the temperature-sensitive element, and connected at a rear end thereof to a lead wire for connection to an external circuit; a metal cap accommodating the temperature sensitive element therein, and joined to a tip end portion of the sheath member; a mounting member having a supporting portion supporting the sheath member, and a mounting seat adapted to abut a sensor-mounting seat directly or indirectly via another member; a joint portion having an outer diameter smaller than a maximum outer diameter of the mounting seat, joined to a portion of the sheath member located closer to the metal cap than the supporting portion and the mounting seat; a vibration-resisting reinforcement portion having an outer diameter greater than a maximum outer diameter of the joint portion and smaller than the maximum outer diameter of the mounting seat, and surrounding a portion of the sheath member arranged between the mounting seat and the joint portion; and a threaded portion arranged on one or the other axial side of the mounting seat, wherein a tip end projection length as measured between the mounting seat of the mounting member and a tip end of the metal cap is 20 mm or more.