| 摘要 |
A dual-purpose arrow shaft insert for pressing into a hollow arrow shaft at either end of the arrow shaft to facilitate the attachment of a nock or arrow point thereto. The insert has an introduction end, a receiving end, and a central cylindrical portion connecting the introduction end to the receiving end. A receiving orifice is formed within the receiving end and extends from the receiving end into the central cylindrical portion of the insert and terminates in a threaded opening which continues farther into the central cylindrical portion toward the introduction end. The receiving orifice is so sized and configured so as to be capable of receiving the shank of a nock. Without any modification, the dual-purpose insert may also receive a point through the receiving orifice. The threaded rod attached to the arrow point is thrust through a shock absorbing sleeve and both are then pressed into the receiving orifice. The arrow point is then rotated to engage the threaded rod into the threaded opening until the arrow point abuts the tip of the insert. The shock absorbing sleeve produces friction on the threaded rod to assist in the preventing of loosening of the point due to repeated impact.
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