Patent ID: 7318331

Claim:
A combination lock comprising: a casing; a returning seat movably received in the casing; a limiting seat linearly movably received in the casing and having a latitudinal path defined in opposite sides of the limiting seat and longitudinal paths defined in the opposite sides of the limiting seat to bisect the latitudinal path; a frame selectively movable relative to the limiting seat; buttons selectively and movably received in the casing and operably connected to the limiting seat, each button having a pin extended out therefrom; and a knob rotatably received in the casing among a first position, a second position and a third position, the knob having a rotator and a body combination and a core selectively connected to the combination of the rotator and the body, the combination of the rotator and the body having a first abutting block to selectively move the limiting seat from a first position to a second position to secure the position of the buttons and the core having a second abutting block integrally formed with the core to selectively move the frame relative to the limiting seat to release the buttons such that when the buttons are secured, the combination lock is in a locked status and when the buttons are released, the combination lock is in an unlocked status.