US Patent 11946288 Lock

A lock defining a rotating axis and for being installed on a door includes a first handle set, a second handle set, a transmission element and a latch mechanism. The first handle set is disposed on a side of the door and includes a first handle and a first tubular element. The second handle set is disposed on another side of the door and includes a second handle, a cylindrical element, a movable element and a second tubular element. The second tubular element is independent from the first tubular element. The transmission element has a first end connected to the first handle set and a second end connected to the movable element. The latch mechanism is disposed between the first handle set and the second handle set and includes a latch tongue driven by the first tubular element or the second tubular element.