Patent ID: 8113024

Claim:
A double system lock apparatus, comprising: a lock shell, having a panel and a main base assembled with each other, wherein the panel has a penetrating hole and a plurality of windows arranged in a row, and the main base has a locating ring, a penetrating hole, and a plurality of flat bases; a combination lock, having a plurality of rotating discs, coupling springs, couplings, and a shaft, wherein the rotating discs have a plurality of notches, the coupling springs fit on the couplings, each coupling has a plurality of lug ribs, the notches of each of the rotating discs is selectively engageable with the lug ribs of the coupling, and the shaft penetrates through every coupling; a key lock, having a lock cylinder and a sleeve set, wherein the back of the lock cylinder is inserted in the sleeve set, the sleeve set partially located in the locating ring, and the sleeve set has two first flat grooves, a second flat groove, and a third flat groove; and a control piece set, having a first control piece, a second control piece, and a third control piece, wherein the first control piece, the second control piece, and the third control piece are pushed on the sleeve set.