Patent ID: 7878672

Claim:
A door knob having a body assembly and an elongated core member for engaging a door lock, said body assembly comprising: a connection member sleeved over said core member, said connection member having a hollow chamber; a transparent cap member sleeved over said core member and joined to said connection member, said cap member exposing a front end with a key hole of said core member; and a touch-sensitive member having a power element, a switch element, and at least a light generating element, connected in series and all housed in said chamber and sealed by said cap member, said light generating element being positioned so that its light projects towards said cap member; wherein, when said door knob is touched by hand, said switch element is closed by the electrostatics of said hand or by the vibration of said door knob; and, by the received electricity from said power element, said light generating element is turned on and the light penetrates through said cap member to provide illumination to said key hole.