| 摘要 |
<p>A contact member (7) which has a cylindrical hole and whose outer circumferential surface has a contour swelling radially outward as viewed from a direction orthogonal to its axial direction is disposed between the wall surface of an axial bore (43) and a center shaft (3) at the rear end of a glow plug (1). The disposed contact member (7) is in contact with the wall surface of the axial bore (43) and the center shaft (3). A tubular insulation member (6) is disposed on the rear side of the contact member (7). By setting the tan´ of dynamic viscoelasticity of the contact member (7) to 0.1 or greater, the amplitude of vibration of the center shaft (3) is suppressed greatly even when the center shaft (3) resonates. As a result, a load which instantaneously acts on the contact member (7) in the radial direction decreases, and deterioration such as deformation of the contact member (7) is prevented.</p> |
