Presser foot of a single-needle sewing machine

Abstract

The invention relates to a sewing machine technology, particularly to a presser foot of a single-needle sewing machine. The presser foot includes a presser foot plate and a cutter, a needle hole which extends from back to front along a straight line to a front end edge and is open is arranged in the presser foot plate, a take-up slot which extends backwards from the rear end of the needle hole is arranged on a bottom surface of the presser foot plate, the cutter is vertically fixed on the surface of the presser foot plate, the front end of the cutter has a blade, the blade is located on a left side edge or a right side edge of the needle hole, an edge of one side of the needle hole corresponding to the blade is provided with a groove which is sunken, and the blade is located in the groove. Compared with a special presser foot of an bird-nest-preventing device of a sewing machine in the prior art, the presser foot provided by the invention can cut off a thread only during sewing, prevents unnecessary stitch skipping and thread breaking faults during sewing, shortens the length of thread residue after the thread is cut, and does not trigger a phenomenon that the thread is easy to cut off when a user sews from a relatively thick part of a cloth to a relatively thin part.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to a presser foot for sewing machines. Background technique [0002] With the continuous development of the garment industry, the current single-needle sewing machines (referred to as single-needle machines) generally have the function of automatic thread trimming. This function improves the production efficiency of operators and reduces labor intensity. It also brings a disadvantage, that is, If the upper thread is not tightened at the beginning of sewing, a mess of threads will appear on the reverse side of the sewing material, commonly known as the "bird's nest" phenomenon, which not only leads to flat and unattractive stitches, but also reduces the quality of the sewing material. Also cause the waste of suture. The reason for the "bird's nest" phenomenon is that the long thread left on the needle after the previous thread trimming is brought to the reverse side of the f...

AI Technical Summary

Problems solved by technology

The enlarged pinhole 11 and thread guide 13 cannot press the fabric well during sewing, which may easily cause skipped stitches and broken threads

When the needle size required for sewing is relatively large, the thread is easy to slide into the thread groove 13, causing thread breakage at the start of sewing and sewing interruption thread, and the needle thread is easily cut by the cutter 2 in the presser foot when sewing from a thicker place to a thinner place also for this reason

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