| 摘要 |
A first elongated tubular member is provided having first and second end portions, an elongated pull member is telescoped into and longitudinally shiftable within the first end portion with a first end of the pull member projecting endwise outwardly of the first end portion and a second end of the pull member longitudinally shiftable in the second end portion of the tubular member. The second tubular member end portion includes diametrically opposite longitudinal slots defined between longitudinally extending opposite side strip sections of the tubular member second end portion. A finger-engageable crosshead has the second end of the pull member centrally anchored thereto and the crosshead includes slots through which the strip sections of the second end portion of the tubular member are slidingly received. Abutment structure is removably anchored between and from the ends of the strip sections of the tubular member remote from the tubular member first end portion and a coiled compression spring is disposed about the second end portion of the tubular member between the abutment and the crosshead. The first end of the pull member includes a transverse opening formed therethrough elongated longitudinally of the pull member and an entrance slot opens into the opening through one side thereof intermediate its opposite ends.
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