A sewing machine with automatic threading function

Abstract

The invention provides a sewing machine with automatic threading function, which belongs to the technical field of sewing machines. It solves the technical problems such as the low degree of automation of sewing machine threading. The sewing machine includes a casing, a side cover, a thread take-up lever and a machine needle. The needle has a threading hole, and the outer surface of the casing is located between the thread take-up lever and the needle with a thread break detection device; the outer surface of the casing is also A thread clamping structure for thread clamping and thread cutting is fixed, and a thread release structure is provided on the side cover. The thread release structure includes a rotating link and a driving member that drives the rotating link to swing to the side of the threading hole of the needle; the rotating link One end of the clamping cylinder and the top line cylinder are fixed, the outer end of the output shaft of the clamping cylinder is fixed with a clamping plate, the clamping plate has an open groove, and the output shaft of the top line cylinder is fixed with an opening groove The ejector rod; the casing is provided with a threading structure capable of clamping the suture at the clamping plate and passing through the threading hole of the needle. The sewing machine of the invention improves the automation degree of threading of the existing sewing machines.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to a sewing machine with automatic threading function. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material; there is no automatic threading device on the current industrial sewing machine. In the event of thread breakage or needle breakage, manual threading is required, which is time-consuming and labor-intensive, especially causing great trouble to people with poor eyesight or the elderly. [0003] At present, some household sewing machines are equipped with automatic threading devices, such as some lockstitch sewing machines. Usually, the automatic threading devices on such sewing machines can be divided into two categories: one is a device with a relatively simple structure but a relatively low degree of automation, Thi...

AI Technical Summary

Problems solved by technology

[0006] In the threading device for sewing machines disclosed in the above-mentioned patent documents, the threading action still needs to be put into the thread hook groove by hand, and the degree of automation is relatively low.

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