of the decorative seat block 25 with the door surface an inner case 21 for a door lock is attached to the stationary can 15 by inserting bolts 13 through a dead bolt 24 for the door lock into the screwed holes 36 of the stationary can 15 the electric operation will be illustrated with reference to the accompanying drawings the two cables 39 and 40 for a power source are used in the motor 8 when the positive electrode is connected to the cable 39 and the negative electrode is applied to the cable 40 the shaft associated with the motor 8 is displaced in the direction of the arrow 50 to push the rotary lower can part 6 associated with the shaft 9 to enter a projection 7 integrated with the rotary lower can part 6 into a number of holes 26 opened on the disc 4 accommodated in the case 1 at this state when the case is turned by hand the rotary lower and upper can parts 6 and 13 are associated with each other and turned together through groove faces 42 to transmit a turning movement to the tailpiece 14 so that the dead bolt 24 is actuated to provide an unlocking state however when.