| 摘要 |
A plastic rivet is composed of a resilient material and has a drive pin and a body. Drive pin has a head and a shank. Distal end of shank has a pair of resilient legs , and proximal end of shank has a transverse hole forming deflectable walls. A first pair of protr usions project radially outwardly from the legs, and a second pair of protrusions project radially o utwardly from the walls. Body has a head and elongated portion insertable into holes in member s to be joined. The elongated portion is comprised of a pair of outwardly tapered longitudinal m embers projecting from the head and interconnected by an inwardly tapered nose. Shank of drive pin is insertable into a passage which extends through the head and elongated portion of the b ody. When drive pin is predriven into the body, the first pair of protrusions engages into s lots in the passage, retaining the drive pin within the body. As drive pin is driven into the bod y, legs and walls deflect inwardly. When drive pin is fully driven into body, the first pair of protru sions engage with mating surfaces formed at the distal ends of the longitudinal members, the s econd pair of protrusion engage with the slots, and the shank of the drive pin and the lon gitudinal members form a substantially solid member. Thus, the extraction of the drive pin fro m the body isopposed by a retention force, and extraction of the body from the holes of the joine d members is opposed by a retention force.
|
