1, Take-up mechanism

1. Cam thread picking mechanism: a mechanism driven by a cam to move the thread picking rod
2. Connecting rod thread picking mechanism: a mechanism driven by a four bar linkage to move the thread picking mechanism
3. Sliding rod thread picking mechanism: a mechanism driven by a crank sliding rod mechanism to move the thread picking mechanism
4. Rotating thread picking mechanism: a mechanism that uses one or two discs or other shaped components equipped with thread picking pins to perform thread picking motion through a rotational motion
5. Needle rod thread picking mechanism: a mechanism consisting of a fixed thread passing or clamping device on the needle rod, or a thread picking rod directly fixed on the needle rod.
2, Feeding mechanism

3, Thread hooking mechanism

4, Take up lever stroke

5, Needle bar stroke

6, Sewing speed

7, Suture thread

8, Stitch

9, Foot presser

10, Material trimming device

11, Punching winder

12, Other devices