RELEASABLE CLOSURE MECHANISM

摘要

This releasable closure comprises a butterfly spring separating a base plate and a movable weight that are coaxial and have interspersed fingers on the peripheries thereof. A first loose garter spring is located completely in first annular grooves in the peripheries of the plate fingers and under first lands on the weight fingers to keep the plate and weight axially spaced apart. A second tight locking ring spring is located in second annular grooves in the plate fingers and on second lands on the weight fingers. The second spring extends beyond the peripheries of the base plate and weight and protrudes into a mating groove in a vehicle to hold the closure securely therein. Forward motion and rotation of the vehicle and closure causes the loose spring to be ejected. Upon impact with the ground, forward movement of the weight compresses the butterfly spring and causes the second spring to slip off the second lands and completely into the second grooves to release the closure and a self-erecting antenna in the vehicle.