Mechanism components of sewing machine

How much do you know about the structural components of sewing machines?

Mainly can be divided into the following:

1. Cam thread take-up mechanism: the mechanism that the cam drives the thread take-up lever to move

2. Connecting rod thread take-up mechanism: a mechanism driven by a four-bar linkage mechanism to move the thread take-up mechanism

3. Slider thread take-up mechanism: a mechanism driven by the crank slider mechanism to move the thread take-up mechanism

4. Rotary thread take-up mechanism: a mechanism that uses one or two discs or other shaped components equipped with thread take-up pins to perform thread take-up movement with a rotating motion

5. Needle bar thread take-up mechanism: a mechanism that fixes the thread passing or clamping device on the needle bar, or directly fixes the thread take-up bar mounted on the needle bar.