Patent ID: 7581417

Claim:
A locking device with changeable combination of numerals for locking a connecting port on a computer, comprising: an enclosure having an insertion section formed at a first end thereof, the insertion section being provided with two corresponding holes and having a fixing seat received therein; a plurality of windows formed on at least one of an upper and a lower side of the enclosure; and a supporting plate located in the enclosure at a second end thereof opposite to the first end; a locking unit arranged in the enclosure and including a rod, a push member, a hooking member, an elastic member, a plurality of sleeves, a plurality of rotating discs, and a push disc; the rod having a line of teeth axially spaced on an outer circumferential surface thereof, and being movably connected at one of two ends to the supporting plate and fixedly connected at the other end to an end of the push member; the push member being provided at another end opposite to the rod with an engaging portion, and a slit disposed on each side of the engaging portion to receive the hooking member; the hooking member being movably connected to the push member by engaging with the engaging portion; the hooking member having a first end in the form of a cross plate confined in the enclosure, and an opposite second end in the form of two hooking arms detachably extended into the holes on the insertion section; the elastic member being located between the push member and the fixing seat; the sleeves being mounted on and around the rod between the supporting plate and the push member, and each being provided with an axially extended slot corresponding to the teeth, two diametrically opposite and externally projected wing portions located at two sides of the slot, and an annular groove formed in and around an end of each sleeve to communicate with the axial slot; the rotating discs being fitted on and around the sleeves, and each being provided along an outer circumferential surface with a plurality of sequentially arranged numeral areas, such that the numeral areas on the same one rotating disc can be selectively exposed from one of the windows on the enclosure corresponding to that rotating disc by turning the rotating disc; and the rotating discs each being provided on an inner circumferential surface with a toothed portion for detachably engaging with the wing portions on a corresponding sleeve; and the push disc being mounted on the rod at the end connected to the supporting plate; and at least two push buttons each being movably arranged at one of two lateral sides of the enclosure to interfere with the push member, wherein an inclined shoulder portion outwardly extended toward the engaging portion is formed on each side of the push member, with which the push buttons interfere.