Sewing machine and thread cutting mechanism thereof

Abstract

The invention discloses a sewing machine thread cutting mechanism which comprises a right thread cutting drive rod, a left thread cutting drive rod, a left thread cutting drive cylinder and a switching switch. The right thread cutting drive rod is used for driving a right movable cutter shaft to rotate, the left thread cutting drive rod is used for driving a left movable cutter shaft to rotate, two ends of the left thread cutting drive cylinder are hinged to the right thread cutting drive rod and the left thread cutting drive rod, and the switching switch is used for switching contacting states between a piston rod of the left thread cutting drive cylinder and a cylinder barrel. The switching switch is adjusted, the piston rod and the cylinder barrel are relatively fixed, the right threadcutting drive rod drives the left thread cutting drive rod to synchronously act, double sewing threads are cut off, the switching switch is adjusted again, the piston rod and the cylinder barrel are relatively slide, right thread cutting drive rod drives the cylinder barrel to slide relative to the piston rod, the right thread cutting drive rod separately acts relative to the left thread cutting drive rod, and a single sewing thread is cut off. When the right thread cutting drive rod acts, the left thread cutting drive rod can be static, and falling-off of the sewing thread is effectively prevented, so that working reliability is improved. The invention further discloses a sewing machine with the sewing machine thread cutting mechanism.

Description

Technical field [0001] The invention relates to the field of clothing equipment, in particular to a thread trimming mechanism of a sewing machine. The invention also relates to a sewing machine including a sewing machine thread trimming mechanism. Background technique [0002] Existing mechatronic sewing equipment, especially automatic sewing machines, are increasingly being adopted by garment manufacturers, so that the overall production efficiency and product quality of garment manufacturers have been steadily improved. Existing automatic sewing machines are usually equipped with a thread cutting mechanism instead of manual thread cutting to meet the improvement of production efficiency. Therefore, it is particularly necessary to improve the thread cutting mechanism. [0003] As attached figure 1 As shown, the existing thread trimming mechanism includes a right thread trimming part 01, a left thread trimming part 02, and a left thread trimming connecting rod 03 whose two ends ar...

AI Technical Summary

Problems solved by technology

However, the existing thread-cutting mechanism cannot make the right thread-cutting part 01 act independently relative to the left thread-cutting part 02. Synchronous action causes the clamped suture thread to fall off, seriously affecting the next smooth sewing of the left thread trimmer 02

Therefore, the working reliability of existing thread trimming mechanism is relatively poor

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