| 摘要 |
Disclosed is a glow plug capable of, even when a housing of the glow plug is made relatively thin, more assuredly preventing deformation of front and rear body portions of the housing. A glow plug 1 has a housing 2 formed with a thread portion 5 and a tool engagement portion 6 and a heater 3. The housing 2 includes a press contact portion 7 brought into press contact with a plug seat surface of an internal combustion engine upon screwing the thread portion 5 into a mounting hole of the internal combustion engine, a front body portion 9 located between the press contact portion 7 and the thread portion 5 and a rear body portion ´ located between the tool engagement portion 6 and the thread portion 5. At least one of the front body portion 9 and the rear body portion 8 has a thickness smaller than or equal to a predetermined value and includes a plurality of reinforcing parts 9A, 8 A provided intermittently in a circumferential direction of the housing 2 in the form of protrusions or recesses extending in the direction of an axis CL1. |
