Sewing machine

Abstract

The invention relates to the technical field of sewing machine manufacturing, in particular to a sewing machine. The sewing machine comprises a driving source, and the driving source is used for replacing a swing-free seat, so that the stitch length of a stitch length adjusting mechanism be adjusted, and the action of positioning the zero position of each feed dog can be implemented on a zero-position positioning mechanism; the sewing machine is characterized in that the sewing machine is further provided with a second driving source and a thread trimming and presser foot lifting area; the driving source idles or stays in the thread trimming and presser foot lifting area; and meanwhile the second driving source actually executes the thread trimming action and the presser foot lifting action. The structure is convenient to assemble and simple, the manufacturing difficulty and the manufacturing cost are reduced, and the working efficiency of the sewing machine is improved. The sewing machine breaks through the design concept of a traditional sewing machine and has relatively high application and popularization value.

Description

technical field [0001] A sewing machine of the present application specifically relates to the technical field of sewing machine manufacturing. Background technique [0002] Swing seat and needle distance adjustment mechanism, thread trimming mechanism and presser foot lifting mechanism are indispensable important parts for completing sewing work in the traditional sewing machine structure. The oscillating seat is installed between the connecting rod and the crank of the cloth feeding shaft. In order to ensure the correspondence between the stitch length of the reverse stitch and the stitch length of the forward stitch, both the stitch length adjustment function and the automatic reverse stitching function are realized by adjusting the angle of the oscillating seat. The needle distance adjustment of the swing seat is one of its important functions. The needle distance adjustment part drives the feeding stud to adjust the angle of the swing seat in the front and rear directio...

AI Technical Summary

Problems solved by technology

The needle distance adjustment of the swing seat is one of its important functions. The needle distance adjustment part drives the feeding stud to adjust the angle of the swing seat in the front and rear direction by rotating the needle distance dial, so as to realize the change of the needle distance; In the automatic adjustment of the needle distance, the automatic reverse sewing part drives the automatic reverse feeding rod group to drive the swing seat to swing to a certain angle through the automatic reverse feeding electromagnet to realize reverse sewing, because the limit of the reverse sewing stitch distance is determined by the working arc of the regulator It is realized by colliding with the head of the feeding stud, so long-term use will cause severe wear on the contact part between the stud and the feeding regulator, resulting in abnormal stitch length, affecting the sewing effect, and the noise when the swing seat is working is also relatively large

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