| 摘要 |
<p>To provide a durable ball-joint dust cover (6) which prevents a function of a dust lip provided in a small diameter opening of a dust cover from being degraded even in the case where an inclined angle of a ball stud (1) with respect to a socket is large (in the case where an oscillation angle is large). A ball-joint dust cover formed of a rubberlike elastic material and having a configuration in which a spherical head portion (2) formed at one end of a ball stud is held inside a socket, a handle at the other end of the ball stud is clamped and fixed to a knuckle (5), a one-end large diameter opening is fixed and held to the outer peripheral surface of the socket by an annular pressing ring (7), and the other-end small diameter opening is held to the handle (4), wherein the outer peripheral surface of the knuckle is provided with an annular step portion (51), and wherein the small diameter opening includes a dust lip (16) which comes into sealing contact with a circumferential surface of the annular step portion.
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