Patent ID: 7140076

Claim:
A knob for a lock comprising: a main knob body having a rear end side, a neck extending outward from the rear end side of the knob body and having a slot; a rear knob shell having a first end attached to the rear end side of the knob body to constitute a knob unit, and a second end connected with a rose; and a reinforcing member mounted on the neck and received in an inner space of the rear knob shell for reinforcing and strengthening the entire structure of the rear knob shell, so that tampering through a gap between the main knob body and the rear knob shell is prevented, and the reinforcing member having a stop that is engaged in the slot of the neck, and the reinforcing member further including a cylindrical portion having a first end wall, wherein the cylindrical portion of the reinforcing member is mounted on the neck of the main knob body, the cylindrical portion having a first end and a second end, the reinforcing member further including a wall projecting from the first end of the cylindrical portion and extending to a position beyond the second end of the cylindrical portion, the first end wall projecting from a distal end of the wall and extending on a plane substantially orthogonal to a longitudinal direction of the cylindrical portion, with the first end wall of the reinforcing member substantially facing the rear end side of the main knob body; wherein the rear knob shell further includes a second end wall that projects from an end of the rear knob shell adjacent to the first end wall of the reinforcing member, with the second end wall of the rear knob shell abutting against the first end wall of the reinforcing member, and with the second end wall of the rear knob shell abutting against the rear end side of the main knob body.