Lock and locking device

A lock, comprising a lock housing, a cylinder assembly being rotatably arranged in the lock housing and a locking keyless assembly being connected to the cylinder assembly in a in transmission way,

• the cylinder assembly comprising a cylinder core and a tailpiece unit, a first clutch mechanism being provided between the cylinder core and the tailpiece unit, and a second clutch mechanism being provided between the locking keyless assembly and the tailpiece unit,
• when the second clutch mechanism is in an engaged state, the locking keyless assembly being movable relative to the lock housing in a first direction under a driving of an external force for locking, the cylinder core and the tailpiece unit rotating along with the locking keyless assembly synchronously;
• when the external force acting on the locking keyless assembly is withdrawn, the locking keyless assembly moving in a second direction opposite to the first direction, so that the second clutch mechanism switches to a disengaged state.