An automatic adjustment needle distance structure of interlock sewing machine

Abstract

The invention provides an automatic adjustment needle distance structure of an interlock sewing machine, which belongs to the technical field of sewing machines. It solves the technical problems such as the dense stitching of interlock sewing machines and the influence on the quality of clothing. The interlock sewing machine includes a casing, a presser foot shaft that can move up and down, and a presser foot plate arranged at the lower end of the presser foot shaft. The upper end of the presser head is fixed with a presser head, and a sensor assembly capable of detecting the up and down movement of the presser head is provided between the presser head and the casing. The sensor assembly and the stepping motor are electrically connected to the controller, and the stepping motor An eccentric wheel is fixed on the output shaft; a motor connecting rod is connected to the eccentric wheel, and the motor connecting rod and the adjusting shaft are connected through the needle distance indicating plate and can drive the adjusting shaft to rotate and swing. The present invention can automatically adjust the needle distance when the presser foot plate passes through the stem, so as to achieve the effect that the needle distance does not change the density and improve the quality of the clothes.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to an automatic adjustment needle distance structure of an interlock sewing machine. Background technique [0002] Interlock sewing machine is a kind of sewing machine, also known as special sewing machine. The stitches it sew are chain sewing stitches, which are mostly used for rolling collars, piping, hemming, stretch seams, and splicing seams of knitted garments. And trimming, etc.; currently, interlock sewing machines on the market generally have the phenomenon of over-stem stitches becoming denser, which will lead to unsightly overall stitches and affect the quality of clothing. [0003] my country's patent (notification number: CN101168888; announcement date: 2008-04-30) discloses a stitch length adjustment mechanism for sewing machines, which includes a stitch length adjustment device, a stitch length adjustment swing lever, a back stitch crank, a back stitch stand, and...

AI Technical Summary

Problems solved by technology

[0004] The needle pitch adjustment mechanism of the sewing machine disclosed in the above-mentioned patent documents realizes the mutual conversion between the large and small stitch pitch adjustment devices through the drive of the reverse stitch dense needle cylinder, but it is desired to adjust the needle pitch in the large stitch pitch adjustment device or the small stitch pitch adjustment device. The size of the stitch length still needs to be adjusted manually, and the adjustment of the stitch length is still troublesome

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