Patent ID: 6668607
Filing Date: 2003-12-30
Classification: E05B,Y10T

Abstract:
A lock core comprising a lower lock cover, a lock plate and an upper lock cover, said lower lock cover, said lock plate and said upper lock cover respectively formed with a curved groove passage, said lower lock cover having a keyhole at one end, said lock plate positioned between said lower and said upper lock cover, said upper lock cover assembled on said lower lock cover, said upper lock cover formed with a recessed hollow at a lower portion, said upper lock cover bored with a plurality of pin holes, said pin holes respectively receiving a locking pin therein; and,characterized by plural recessed holes bored in said recessed hollow of said upper lock cover, each said recessed hole fitted therein with at least one steel ball, said steel balls in said recessed holes able to stop an electric drill employed by a burglar from drilling forward, having excellent effect of anti-theft.