Glow plug terminal and glow plug

摘要

A glow plug having a main body bracket, a heater, a center shaft, an insulator, an O-ring that is provided between the front end surface of the insulator and the main body bracket, and a pin terminal that is fitted to the rear end portion of the center shaft and used for supplying electricity from the outside. The pin terminal includes a small-diameter portion, a flange, and a large-diameter portion where an engagement portion and a fitting recess are formed. The large-diameter portion includes a crimp formation region, which is formed so as to have the even outer diameter and be capable of being crimped, in a range from the front end thereof to the front end of the engagement portion. A part of the crimping target portion forms a crimping portion that fixes the rear end portion of the center shaft by crimping.

主权项

1. A pin terminal for a glow plug comprising:
a small-diameter portion which has a shaft shape extending in an axial direction and is to be connected to a conductive member for supplying electric power from an outside; a flange that is formed integrally with a front end of the small-diameter portion and is formed so as to have an outer diameter larger than an outer diameter of the small-diameter portion; a cylindrical large-diameter portion that is formed integrally with a front end of the flange so as to be shorter than the small-diameter portion in the axial direction, is formed so as to have an outer diameter larger than the outer diameter of the small-diameter portion and smaller than the outer diameter of the flange, and includes a fitting recess formed therein in a radial direction so as to be recessed toward a rear end of the large-diameter portion from a front end of the large-diameter portion in the axial direction; and an engagement portion which is positioned between a maximum diameter position of the flange and the large-diameter portion and has an outer diameter gradually reduced toward the large-diameter portion, wherein the large-diameter portion includes a crimp formation region which is formed in a range from a front end of the large-diameter portion to a front end of the engagement portion so as to have an even outer diameter and be capable of being crimped, wherein the flange includes a convex curved surface, said convex curved surface, when taken in cross-section in a direction perpendicular to the axial direction, having a circular shape, and wherein a step is formed on the convex curved surface at a side of the cylindrical large-diameter portion with respect to the maximum diameter position, said step configured to inhibit an elastically deformable sleeve that is slidable over the pin terminal from sliding off.