Presser foot safety switch of sewing machine

Abstract

The invention provides a presser foot safety switch of a sewing machine, belongs to the technical field of sewing equipment, and solves the technical problems of mistaken induction of presser foot safety switches of existing sewing machines and the like. The sewing machine comprises a presser foot assembly, wherein the presser foot assembly is connected with a presser foot arm capable of driving the presser foot assembly to move; the presser foot safety switch comprises a presser foot cam and a trigger switch, a presser foot wrench capable of driving the presser foot cam to rotate is arranged on a casing of the sewing machine, the presser foot cam can drive the presser foot arm to move, and the presser foot cam has a bulge capable of triggering the trigger switch. The presser foot cam rotates to drive the presser foot arm to move upwards, the presser foot assembly can be lifted, and the bulge on the presser foot cam rotates to be opposite to the trigger switch and then squeezes and triggers the trigger switch of the sewing machine for safe starting, so that a presser foot can be started safely while the presser foot cam rotates to enable the presser foot assembly to rise.

Description

technical field [0001] The invention belongs to the technical field of sewing equipment, and relates to a safety switch for a presser foot of a sewing machine. 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. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. The presser foot of the sewing machine is an indispensable part in the feeding mechanism of the sewing machine. Various forms of the sewing machine presser foot play a very important role in the production process, such as the special sewing machine presser foot for top thread and invisible zipper, Pleating sewing machine presser feet, etc., it is very important to choose different sewing machine presser feet in different sewing operations. Usually when the operat...

AI Technical Summary

Problems solved by technology

[0004] In the safety switch structure of the presser foot of the overlock sewing machine disclosed in the above-mentioned patent, when the presser foot arm is taken out, and the moving distance of the presser foot arm is too small, the Hall sensor is still in the sensing state, and the safety switch of the presser foot arm will not Normal start, there will be security risks

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