Reverse stitching and needle distance adjustment structure and sewing machine

Abstract

The invention provides a reverse sewing and needle distance adjusting structure of a sewing machine, which comprises a reverse sewing component, wherein the reverse sewing component comprises a rotatably arranged reverse sewing crank and a driving component for driving the reverse sewing crank to swing; a needle distance adjusting component which comprises a needle distance adjusting piece, a connecting rod component and a swinging seat which is rotatably arranged and connected with a feeding shaft, wherein one end of the connecting rod component is hinged with the needle distance adjusting piece, the other end of the connecting rod component is hinged with the swinging seat, and the connecting rod component is connected with the reverse sewing crank in a sliding way; the length of the needle distance adjusting piece, which is arranged on the shell and extends into the shell, is adjustable; when the length of the needle distance adjusting piece extending into the shell is adjusted, theswinging seat is driven to swing through the connecting rod component so as to adjust the size of the needle distance; when the driving component drives the reverse sewing crank to swing for a fixedangle, the connecting rod component drives the swing seat to swing, so that the state adjustment between the reverse sewing and the right sewing is completed. The structure can ensure the same needledistance as normal sewing when the reverse sewing is carried out, the stability of the needle distance is ensured and no noise is caused when the reverse sewing is carried out.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to a reverse sewing machine and a stitch pitch adjustment structure of a sewing machine. Background technique [0002] Existing sewing machines, see figure 1 As shown in the figure, the realization process of the automatic reverse sewing function of the sewing machine under a certain stitch length: the reverse sewing electromagnet (not shown) is energized, and the cloth feeding swing seat 500 is pulled by the reverse feeding rod-400 to rotate around the fixed pin, and the cloth feeding swing seat The rotation of 500 drives the feed regulator 200 to rotate through the reverse feed lever 2 300, so that the upper arc surface of the feed regulator 200 contacts with the needle distance adjustment stud 100, thereby limiting the rotation angle of the feed swing seat 500 for reverse sewing To realize the reverse sewing function of the sewing machine. Since the response time of the...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a backstitch and stitch length adjustment structure and a sewing machine, which are used to solve the problem of easy noise and unstable stitch length during back stitching in the prior art. question

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