Abstract: A USB combination lock for an electronic device may include a lock rod, a shell body, a USB connector, a push button, and a lock piece. The USB connector can be directly inserted into the USB port of the electronic the electronic device, and the blocking portion of the USB connector can be engaged with the USB port. When the push button is in a released position, the lock piece will block a bottom portion of the hooking member of the USB connector, and the lock piece will not be pressed inwardly by the blocking portion. Thus, by shifting the numeral wheels, the connecting piece can be turned into the lock position, leading to the combination lock of present invention achieving the burglarproof effect.

Abstract: A USB lock for an electronic device may comprise an inner casing, an outer casing, a USB connector and a driving unit. The inner casing has a front opening to secure the USB connector thereon. A rear portion of the inner casing has a tube body, and a first through hole penetrating through the tube body is communicated with the front opening and configured to receive the driving unit with a lock rod and a key lock. The USB lock of the present invention is configured to engage with a USB port of a 3C product to achieve the anti-theft effect, which is easily to assembly, simplifies the structure, lowers manufacturing cost and prevents the 3C product from getting infected with a virus through an unsafe USB.