Patent ID: 7343840

Claim:
A sawing machine comprising: a base; and a cutting angle adjustment mechanism comprising: a pivot shaft mounted inside said base; a bracket on which a saw unit is mountable pivotally mounted to said pivot shaft; an axle arranged in parallel to said pivot shaft, said axle having a first end coupled to said bracket and a second end extending out of an outside wall of said base; a handwheel coupled to the second end of said axle and movable along said axle between an idle position and an engagement position, said handwheel having a wheel body for rotation by the user and a gear disposed at one side of said wheel body; a screw rod arranged in parallel to said pivot shaft, said screw rod having a first end coupled to said bracket and a second end extending out of the outside wall of said base; a toothed plate fixedly fastened to said base and located between said handwheel and said bracket, said toothed plate having a smoothly arched sliding slot through which said screw rod extends, and a rack for the engagement of said gear of said handwheel for allowing said bracket to be biased upon a rotary motion of said handwheel after said handwheel has been moved to said engagement position; and a positioning member fixedly fastened to the second end of said screw rod and rotatable with said screw rod relative to said base and said bracket, said positioning member having a stop flange turnable with said positioning member in and out of the space between said gear of said handwheel and said base, said stop flange being for prohibiting movement of said handwheel from said idle position to said engagement position when turned with said positioning member into the space between said gear of said handwheel and said base.