LOCK DEVICE, AND UNLOCKING PREVENTION METHOD FOR LOCK DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a lock device having a simple construction and requiring no basic design change as well as an unlocking prevention method for the lock device capable of definitely preventing picking crime particularly when the occupant of a house is at home. SOLUTION: A lock face plate 10 is provided at the front side of a frame 1 of a lock device A1. A dead bolt 2 and a latch bolt 3 are located at the lower side of the lock face plate 10. The dead bolt 2 is fixed to the end portion of a slider which is slidable inside a frame 1. The slider is provided with an interlocking member. The interlocking member is interlocked with the dead bolt 2 and moves back and forth. A linking hole is provided near one end of the interlocking member. A lid body 11 of the frame 1 has a lock pin device 6. The position of the lock pin 61 of the lock pin device 6 corresponds to the position of the linking hole of the interlocking member when the dead bolt 2 is set to a locked state.