The newest patent foot lifter structure design, foot lift portable and flexible, thread tension reset stable after loosen,The up and down axel adopt strong anti- abrasive synchronous belt drive, high accurate, low noise, adopt full sealed cool auto oil lubrication system,Adopt moving guard protect needle, prevent needle step, keep perfect stitch,The newest patent open needle bar guard cover design, conveniently for needle thread,The newest adjustable take up structure design, efficiently prevent needle step.