| 主权项 |
1. A blind rivet for coupling a first workpiece to a second workpiece, the rivet comprising:
a plastic rivet body that includes a hollow sleeve of a first diameter, and a hollow flange formed at a first end of the sleeve, the flange having a second diameter larger than the first diameter of the sleeve; a plastic mandrel that includes a shank mounted within the rivet body and extending out from the flange, and a head formed integrally with the shank, the head of a third diameter larger than an inner diameter of the sleeve, the head disposed adjacent to a second end of the sleeve that is opposite the flange; a plurality of slits of a constant width formed in the sleeve and arranged circumferentially around sleeve and extending in the longitudinal direction of the sleeve from adjacent to the flange to a position near the second end of the sleeve that is adjacent to the head; a plurality of legs formed in the sleeve; the legs can be flexed in order to expand outward in the radial direction at an intermediate position therein, by a pressing force acting from the second end of the sleeve to the first end of the sleeve, when a pulling-out force is applied to move the shank relative to the flange; a body lock formed on an inside of the rivet body, and a mandrel lock formed in the shank, the mandrel lock is fashioned so as to be latchable with the body lock and maintain the legs in an expanded condition; a stopper formed in the shank closer to the head than the mandrel lock; an abutment formed in the body lock and engageable with the stopper to limit the movement of the shank when the pulling-out force is applied; and a breakable point of small diameter formed in the shank at a position adjacent to the mandrel lock, the breakable point will break when the pulling-out force is applied on the shank after the stopper has engaged the abutment. |
