Thread cutting device of sewing machine

Abstract

The invention provides a thread cutting device of a sewing machine. The thread cutting device is characterized by comprising a lower cutter unit, an upper cutter unit and a driving unit; the upper cutter unit comprises an upper cutter; the lower cutter unit comprises a lower cutter; the driving unit is separately hinged to the upper cutter unit and the lower cutter unit; the driving unit is hinged to a housing case of the sewing machine; when the driving unit swings, the upper cutter unit and the lower cutter unit are driven to move to enable the upper cutter and the lower cutter to simultaneously move to the center of a machine needle; the thread cutting edge part of the upper cutter and the thread cutting edge part of the lower cutter are overlapped near the center of the machine needle for thread cutting. According to the thread cutting device provided by the invention, problems that thread residues left on cloth are excessively long after threads are cut by a thread cutting device and the thread residues need to be manually trimmed after sewing in the prior art can be solved, so that a sewing process can be simplified, work efficiency is greatly increased, and moreover, the workload of an operator can be relieved.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to a thread cutting device of a sewing machine. Background technique [0002] In the prior art, when the thread cutting device of the sewing machine completes the thread cutting action, it is generally completed by the cooperation of the fixed knife and the moving knife. The fixed knife is fixed on the casing and is far away from the center of the needle. Therefore, when cutting the thread, the thread cutting position will also be corresponding. It is far away from the center of the machine needle, so that after thread trimming, the thread ends left on the fabric are too long. After sewing, the thread ends need to be trimmed again with special scissors, which increases the sewing process and increases the workload of the operator. Contents of the invention [0003] The object of the present invention is to provide a thread cutting device for a sewing machine, aiming to solve...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thread trimmer for a sewing machine, which aims to solve the problem in the prior art that the thread end left on the cloth after the thread trimmer is cut is too long, and the thread end needs to be manually trimmed after sewing

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