Handcuff lock construction

摘要

In a handcuff device of the double locking type having a latch with inclined teeth which allows the locking arm of the cuff to rotate about and enclose the wrist and hold the locking arm in place around the wrist and having a bolt behind the latch that is slideable under the action of an externally actuated drift pin over the latch to a locking position that locks the latch against the locking arm preventing movement of the locking arm in either direction. The unintentional movement of the bolt into its locking position is prevented by providing a restraining means-a spring loaded pin-that operates against the casing and the bolt to resiliently urge the bolt against the latch and against the spreading action of mating shoulders on the bolt and latch that cause the two to spread apart against the action of the restraining means as the bolt moves forward towards the locking position and the shoulders engage. The resistance offered by the restraining means against the spreading action of the shoulders is sufficient to overcome any internal movement of the bolt if the cuff is struck or jarred. The latch also preferably has an inclined face against which the drift pin acts to ease the effort required to spread the bolt from the latch and move it into the locking position.