When the sewing machine is sewing, after the needle thread is passed through the loop formed by the sewing material, a mechanism that hooks the loop to form a stitch is formed.

When the sewing machine is sewing, after the needle thread is passed through the loop formed by the sewing material, a mechanism that hooks the loop to form a stitch is formed. It is classified as:

Rotating hook line mechanism: The mechanism for completing the hook line action with a rotating hook line member, which is divided into:

Rotary hook hook mechanism: The rotary hook body in the lock stitch sewing machine is driven by the rotating mechanism, hooks the needle loop of the needle and wraps around the bobbin sleeve and the shuttle thread to form a lock stitch.