| 摘要 |
The joining of adjacent parts can be quickly and releasably accomplished by an elongated pin containing a unitary torsion member therein provided with flexible arms terminating in looped ends arranged to protrude from the opposite sides of the pin and prevent the withdrawal thereof from the adjacent parts until the pin is pulled with sufficient force to cam the looped ends back into the interior thereof. The torsion member provides a prestress action through the coil portion thereof engaging the walls of a cylindrical recess in the pin and outwardly diverging straight arms extending from the coil portion in linear contact with the wall surfaces of the recess.
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