| 摘要 |
The invention relates to a screw with anti-loosening means, which comprises a securing element (2) which is provided with a ring portion (21) and with this is or can be inserted about a shaft (11) of the screw (1) under a head (12) thereof and, with the screw (1) in a state in which it is screwed on a base, prevents said screw from being turned back counter to a screwing-in direction, wherein the securing element (2) is provided on the ring portion (21), on the side of the latter facing the surface of the base, with at least one projection (231) which can be pressed into the surface when screwing in the screw (1). Advantages in structure and in function are achieved in that the securing element (2) is provided, in the outer circumferential region of the ring portion (21), with finger-like extensions (22) which, with the securing element (2) in the inserted state, extend along the circumference of the head (12) and, under spring-elastic forces of the securing element (2), come into contact with a surface structure of the body (12) that has an inhibiting action counter to the screwing-in direction, and in that the extensions (22) have inwardly bent-off end portions (223) which engage over the head (12), or a circumferential portion thereof protruding radially thereon, on the upper side thereof facing away from the shaft (11). |
