Single-electromagnet upper backstitch mechanism of roller machine

The single-electromagnet upper backstitch mechanism comprises an upper backstitch electromagnet, a swing rod shaft, a thread backstitch pressing plate and a thread backstitch upper clutch, a needle swing rod is arranged on the outer wall of one end of the swing rod shaft, and an upper backstitch electromagnet swing rod is arranged on the outer wall of the side, close to the needle swing rod, of the swing rod shaft. One side of the upper backstitch electromagnet swing rod is provided with an upper backstitch electromagnet, one end of the swing rod shaft, which is far away from the needle swing rod, is provided with a thread backstitch pressing plate, and one end of the thread backstitch pressing plate is provided with a thread backstitch swing rod. The upper backstitch mechanism has the advantages that the upper backstitch mechanism is simple in structure and convenient to operate, consistency of actions of a machine needle and a stitch wheel is guaranteed, consistency of product quality and production efficie