Patent ID: 7401938

Claim:
An extension bar with built-in light, comprising: an elongate body made by conductive material and having a first end and an engaging recess defined in a second end of the elongate body, a transverse hole defined through the elongate body and communicating with the engaging recess, a passage defined axially through the elongate body and communicating with the engaging recess and defining an opening in the first end of the elongate body; a switch member made by non-conductive material and extending through the transverse hole and a first conductive member connected to the switch member, the first conductive member exposed on an outer surface of the switch member and in contact with an inner periphery of the transverse hole; a carrier made by non-conductive material and received in the engaging recess, a second conductive member connected to the carrier and having a first end and a second end, the first end extending to a first end of the carrier and the second end located at a second end of the carrier, a gap defined between the second conductive member and the elongate body, and a power supply unit and a light bulb received in the passage, the power supply unit having a first end facing the first end of the carrier and a second end of the power supply unit facing a first end of the light bulb, the first end of the light bulb made by conductive material and being in contact with an inner periphery of the passage, a second end of the light bulb facing the opening in the first end of the elongate body.