| 摘要 |
<p>On a rear end side of a glow plug (1) and between an inner circumferential surface of a shaft hole (43) and a middle shaft (3), an outline of an outer circumferential surface viewed from a direction orthogonal to an axis direction thereof is swollen outward in a radial direction, and an abutment member (7) that includes a cylindrical hole is arranged. The abutment member (7) that is arranged abuts the inner circumferential surface of the shaft hole (43) and the middle shaft (3). On a rear end side of the abutment member (7), an insulation member (6) with a cylindrical body is arranged. The tan delta of the dynamic viscoelasticity of the abutment member (7) is 0.1 or higher, and thus the amplitude of the middle shaft (3) is substantially suppressed even in a case where resonance occurs in the middle shaft (3). Therefore, an instantaneous radial-direction load on the abutment member (7) is reduced, and deterioration such as deformation of the abutment member (7) is prevented.</p> |
