Moving mechanism of a scanner

A moving mechanism installed in a scanner to move a scanning mechanism, which is comprised of a light source of a lens, a reflecting unit, which is comprised of a first lens and a second lens, at a speed ratio of 2:1, so as to achieve a scanning operation, the moving mechanism comprising:

• a pulley wheel transmission mechanism, said pulley wheel transmission mechanism comprising a rope, a first movable pulley wheel, a second movable pulley wheel, a first fixed pulley wheel, and a second pulley wheel, said first and second movable pulley wheels being pivoted to said reflecting unit, said fixed pulley wheel being fixed to the shell of the scanner, said rope having a front end fixed to the shell of the scanner, and a rear end passing over said first fixed pulley wheel, which is fixed to said reflecting unit, said first fixed pulley wheel, which is mounted on the shell of the scanner, said second fixed pulley wheel, the fixed point of said front end at the scanner, said second movable pulley wheel, which is pivoted to said reflecting unit, and then to an opposite end at the shell of the scanner, said rope being coupled to said scanning mechanism, permitting it to be disposed between said second fixed pulley wheel and said second movable pulley wheel;
• and
• a second transmission mechanism controlled to move said reflecting unit, causing it to move the rope of said pulley wheel transmission mechanism.