Illuminating driving tool

An illuminating driving tool, comprising:

• an elongated hollow handle made of an insulator material and having a connecting end, an operating end opposite to said connecting end, and an accommodating space between said connecting end and said operating end and adapted to receive a power source therein;
• an illuminating device disposed at said connecting end of said handle and adapted to be connected electrically to the power source inside said accommodating space;
• an adapter made of a light-transmittable material and having a first end and an opposite second end, said first end of said adapter being mounted on said connecting end of said handle and being formed with a receiving chamber to receive said illuminating device, said second end of said adapter being formed with an engaging hole;
• an elongated tool member having an axis along which a bit operating end and a mounting plug are formed, said mounting plug engaging detachably and non-rotatably said engaging hole in said second end of said adapter such that said illuminating device is coaxial with said axis of said tool member;
• and
• a conducting unit mounted in said handle and adapted to connect electrically said illuminating device and the power source, said conducting unit including:
• a conducting rod mounted in said accommodating space and having a first contact connected electrically to said illuminating device, and an opposite second contact;
• a conducting spring disposed in said operating end of said handle and adapted to be connected electrically to the power source, said spring further having a third contact for connecting electrically with said second contact of said conducting rod;
• and
• an operating knob made of an insulator material and mounted movably and adjustably on said operating end of said handle, said spring being mounted on said operating knob, said operating knob being movable relative to said handle between a closed-circuit position, where said third contact on said spring is in contact with said second contact of said conducting rod to make electrical connection between said illuminating device and the power source, and an open-circuit position, where said third contact on said spring is moved away from said second contact of said conducting rod to break electrical connection between said illuminating device and the power source.