PHOTOELECTRIC COMBINATION LOCK

A kind of phototlectric combination lock capable of encoding by userself, features that in the mutual parallel and equidistant sliding solts, there are N slide cross bar-shaped dialing boards, on each of which there are M equi-distant and equal height holes. When using, the M-1 holes in the M holes of each cross bar-shaped dialing board are covered with opaque material, through the motivation of the dialing board, when the uncovered hole on each dialing board lies on a straight line between light source and photoelectric cell, the photoelectric cell will send out a signal to open the lock, otherwise, it well alarm. Said invention can encode in cipher by user self according to the requirement of the user. The total number of cipher can up to M to the power of N. Said invention features convenient for operation, strong secrecy and can be used for safes of the financial, and accounting departments.