The utility model provides a curved needle structure of a
sewing machine, and belongs to the technical field of sewing machines. The problem of how to ensure that the threading operation of the curved needle is not affected while the sewing quality is improved is solved. The curved needle structure comprises a needle rod, a strip-shaped groove is formed in the surface of one side of the needle rod, a thread
inlet channel communicated with the strip-shaped groove is formed in the rear end of the needle rod, a thread outlet hole communicated with the strip-shaped groove is formed in the front end of the needle rod, a plate-shaped thread blocking part is fixed or integrally formed between the left side groove wall and the right side groove wall of the strip-shaped groove, and the number of the thread blocking part is one. The length of the thread blocking part is smaller than one half of the length of the strip-shaped groove, and a thread passing channel for a sewing thread to penetrate through is formed between the thread blocking part and the bottom face of the strip-shaped groove. According to the curved needle structure, the thread blocking part is reasonably and additionally arranged, so that the thread can be prevented from running out of the strip-shaped groove, the frizz of the thread can be smoothed, the
fracture risk of the thread can be reduced, the sewing quality and efficiency of a
sewing machine are greatly improved, and meanwhile it is guaranteed that threading operation of the curved needle is not affected.