Take the most common household JA sewing machine as an example. First insert the wire into the threaded pin on the machine, pull out the wire end of the wire, pull the “notch” of the wire through the panel to the wire gripper, enter the wire gripper, and pass the wire spring. Then, pull up, the thread passes through the hole of the take-up rod, and then pulls down through the panel hook, enters the needle bar hook, penetrates the pinhole, and the upper thread threading process ends.

        The method of winding the bottom line is to insert the air-bottom coil into the bobbin and press the winder to make the winder close to the belt pulley of the sewing machine. The coil is inserted into the lower plug, the thread is pulled out, and the clip is fixed in the air-bottom coil through the clamp, and the pedal of the sewing machine is stepped, and the bottom coil can be wound with the rotation of the winder.

        Since the sewing machine has many models, the method of threading is slightly different, but it is just the same.