EXPANDABLE ARROW NOCK

摘要

Embodiments of the Expandable Arrow Nock are comprised or a nock tip, expandable fins, internal spring or springs, external bands, high tensile strength wire, a pass-through module, a collar, and a nock anchor. When the arrow is fired, the fins are in the stowed position and remain in the stowed position as the arrow travels to the point where the arrow impacts the target. At the instant when the arrow impacts a target, the deceleration of the arrow releases the internally or externally mounted spring, band, or other potential energy storage device that in turn force the fins into the deployed or open position. The deployed fins prevent the nock from traveling past the impact side of the target. However, the shaft portion of the arrow detaches from the nock and the pass-through module and continues its travel.