Patent ID: 7146739

Claim:
A laser-guiding coordination device for a drilling machine comprising: a C-base being a C-shaped body with a top face, an outer side, an inner space and a bottom face and having two compartments oppositely formed inside the C-base; two side windows defined in the outer side of the C-base to respectively communicate with the two compartments; and two top windows defined on the top face of the C-base to respectively communicate with the two compartments; and two laser-line projectors respectively accommodated inside the two compartments to emit laser-lines from the bottom face of the C-base, each laser-line projector comprising: a first adjuster being a cylindrical body with a side periphery, a closed end revealed via the side windows and a slit end and having a sunken hole defined from the side periphery in radius and divided into a lower area and an upper area; and a positioning rib formed on an inner periphery of the sunken hole in the lower area; and an elongated hole defined in the slit end to communicate with the upper area in the sunken hole; a second adjuster rotatably accommodated inside the sunken hole in the first adjuster, being a tubular body with two ends and an inner space, and having a sidewall; a knob head formed on one end of the tubular body and revealed via a corresponding one of the top windows of the C-base; and a slit longitudinally defined in the sidewall of the tubular body to movably receive the positioning rib of the first adjuster; a laser generator firmly accommodated inside the inner space of the second adjuster and generates a laser line; and an arresting ring mounted on the knob head.