| 摘要 |
A glow plug including a seal member that has excellent seal performance and does not easily come off and a method for manufacturing the glow plug are provided. The glow plug 1 includes a metal sheath tube 4 having a closed front end; a heating element 5 accommodated within the sheath tube 4; insulating powder 6 which fills the interior of the sheath tube 4 so as to surround the heating element 5; a rod-shaped metal lead 7 which is connected to the heating element 5 and inserted into the sheath tube 4 from the rear end thereof; and a seal member 8 which is located in a seal portion 4a at the rear end of the sheath tube 4 to hermetically seal the gap between the sheath tube 4 and the lead 7. The glow plug 1 is characterized in that the sheath tube 4 is formed to have a substantially uniform outer diameter over an axial range including and extending beyond a range where the seal portion 4a is formed, and the sheath tube 4 has an engagement projection 16 formed at the seal portion 4a and deformed so as to protrude radially inwardly. |
