CLUTCH MECHANISM (PATENT): Special designed clutch mechanism is set on a feeding shaft, link a connecting rod and a swing mechanism. The swing mechanism has two drag bars (No.1 and No. 2). This mechanism including driven device, friction plate, inner clutch, positioning device, micro-adjustment device, outer clutch and oil seal. The No.1 and No.2 drag bars will pass down the push sectionally from sewing mechanism to the friction plate through the outer & inner clutch. The feeding shaft will running intermittently and make the feeding shaft to feed needle and material. The oil seal could avoid the oil and dust dropping to the area between inner and outer clutch, so keep the parts from damage.