Patent ID: 6880376

Claim:
An anti-twist key lock with changeable locking device, which comprising: a key lock case, the key lock case having a closed end and an open end, the circumference of the open end having a slit and an opposite inner groove, the circumference of the key lock case near to the closed end having a through hole; a locking bar installed in the said through hole and a compression spring deposited at bottom of the locking bar to push it outwardly; a locking tumbler set installed in said key lock case, the locking tumbler set having an interlocking post formed at its end, the interlocking post can be rotated by a key to push the locking bar inwardly or outwardly; a front plug, one side of the front plug having a fitting part, the circumference of the fitting part having a receiving groove, the center of the front plug having a key hole, the fitting part of the front plug can be pushed into said open end of the key lock case; a locating retainer, the locating retainer can be inserted through said slit into said receiving groove to clip the front plug and make it capable of being rotated freely.