Disclosed is a combination lock, comprising a rotatable knob capable of relative rotation, a panel, a bolt, and a dial assembly. The dial assembly comprises a base having a movement chamber, a dial shaft, multiple sets of bushings and dials, a position resetting mechanism, a positioning member, and a protection frame The rotatable knob can be rotated relative to the panel to a first position, second position, third position, or fourth position, so as to achieve locking, automatic password resetting, automatic dial position resetting, and manual password setting. The combination lock uses one-time temporary passwords, thereby achieving superior security performance.

Disclosed in the present invention is a novel code wheel combination lock, comprising a knob and a face plate that can rotate with respect to each other, a lock tongue, and a code wheel assembly. The code wheel assembly comprises a base having an accommodation cavity, a code wheel shaft, several sets of bushings and code wheels, a reset mechanism, a positioning member, and a protection frame; the base is mounted on the face plate; the code wheel shaft passes through a movement cavity and can axially moves; the bushings are sleeved on the code wheel shaft and can rotate together with the code wheel shaft or with respect to the code wheel shaft; the code wheels are sleeved on the bushings and can rotate together with the bushings or with respect to the bushings; the reset mechanism is used for resetting the code wheels; the positioning member is used for limiting reset of the code wheels; the protection frame is used for changing the matching mode between the code wheels and the bushings; in the rotation of the knob and the face plate with respect to each other, there are a first position, a second position and a third position to respectively implement the functions of locking, automatic code wheel reset, and manual password setting. The present invention has a function of automatically resetting the code wheels after unlocking and before locking, thereby improving the product safety and preventing password exposure.

The knob lock of the present invention includes a knob, a first driving unit disposed on the knob, a driving barrel, a second driving unit, a lock unit, and a lock core. When the lock core is in a locked state, the driving barrel is restricted from rotating by the lock core, and the knob rotates alone with respect to the driving barrel. When the lock core is in an unlocked state, the restriction to the rotation of the driving barrel by the lock core is removed, the first driving unit applies a driving force on the second driving unit when the knob rotates, and the driving force rotates the driving barrel to make the lock unit rotate together.

The knob lock of the present invention includes a knob, a first driving unit disposed on the knob, a driving barrel, a second driving unit, a lock unit, and a lock core. When the lock core is in a locked state, the driving barrel is restricted from rotating by the lock core, and the knob rotates alone with respect to the driving barrel. When the lock core is in an unlocked state, the restriction to the rotation of the driving barrel by the lock core is removed, the first driving unit applies a driving force on the second driving unit when the knob rotates, and the driving force rotates the driving barrel to make the lock unit rotate together.