| 摘要 |
An improved self-locking safety pin unit or device has been devised in which a thumb and finger rotatable sleeve is adapted, when turned in one direction, to raise and then turn or swing, an upper, loop-like, latching or nose part under resilient spring pressure out of engagement with a pointed end of a pin part and then into a sidewise offset, clearing or open relation with respect thereto when a lower, pin-supporting, loop-like, base part is gripped to retain it in a stationary position. The lower base or loop part is shaped to receive keys or other eyelet-like elements thereon that, when the pin part is in an open position, may be introduced thereon by first swinging a pivoted pin closure to an open position which then is moved to a closing-off position for key retention on the lower loop part.
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