US 12,134,920 B2
Handcuff ring with mechanism for enhanced locking and handcuffs having the same
Yang-Fu Cheng, Taipei (TW)
Assigned to KANTAS PRODUCTS CO., LTD., Taipei (TW)
Filed by KANTAS PRODUCTS CO., LTD., Taipei (TW)
Filed on May 10, 2022, as Appl. No. 17/740,360.
Claims priority of application No. 110141705 (TW), filed on Nov. 9, 2021.
Prior Publication US 2023/0142788 A1, May 11, 2023
Int. Cl. E05B 75/00 (2006.01)
CPC E05B 75/00 (2013.01) 12 Claims
OG exemplary drawing
 
1. A handcuff ring with mechanism for enhanced locking for a handcuff, the handcuff ring comprising:
a stationary strand formed with an opening on an inner side thereof, a receiving space therein that extends from the opening, a keyhole on a front side thereof, at least one locking groove on at least one of the front side and the rear side and sunken towards the receiving space along an axial direction, and an insertion allowing mechanism other than the at least one locking groove that protrudes towards the receiving space along a protruding direction or is sunken along a depressing direction away from the receiving space, wherein each of the protruding direction and the depressing direction of the insertion allowing mechanism is different from the axial direction of the at least one locking groove, and the opening and the keyhole communicate with the receiving space separately, and the locking groove communicates with the receiving space;
a movable strand having one end pivotally connected to the stationary strand and an outer periphery of the other end thereof formed with a plurality of teeth, and configured to be rotated toward the opening to correspond the teeth to the opening;
an engaging element pivotally disposed in the receiving space with a top side thereof protrudingly formed with a first abutting portion, a bottom side thereof formed with a plurality of engaging teeth, and an end thereof that is adjacent to the keyhole protrudingly formed with a pushing portion;
an elastic element fixed in the receiving space and configured to:
press against the engaging element through a bottom side of the elastic element; and
drive the engaging element to engage the engaging teeth with the teeth when the other end of the movable strand is inserted into the opening so as to lock the movable strand in the opening and form a closed ring; and
a stop portion movably positioned in the receiving space, having a first end corresponding to the locking groove, formed with a second abutting portion that is adjacent to a second end of the stop portion and extending toward the engaging element, and configured to be displaced toward the keyhole until the second abutting portion is displaced to be located above, and abuts against, the first abutting portion when a thin rod is inserted into the locking groove to push the first end of the stop portion, wherein the insertion allowing mechanism forms an insertion allowing space different from the at least one locking groove and whose boundary has a part facing and spaced apart from the first end of the stop portion, a transverse length of the insertion allowing space is less than a transverse length of the at least one locking groove, and the elastic element is configured to press against a bottom side of the stop portion through the top side of the elastic element.