An intelligent thread tension balance device and sewing machine for sewing machine

Abstract

The invention provides an intelligent thread tension balance device for sewing machines, which includes a thread clamping mechanism and a driving mechanism; the thread clamping mechanism includes a mounting seat, a clamping shrapnel and a thread passing shaft; the mounting seat is fixedly installed on the body of the sewing machine Above, the clamping shrapnel is fixedly mounted on the mounting seat, and the thread passing shaft is rotatably connected to the mounting seat; the cylindrical surface of the thread passing shaft is provided with a thread passing groove along the rotation direction of the thread passing shaft, And the wire passing groove is a non-closed structure; the clamping elastic piece is fixedly connected to the mounting seat, and is tightly attached to the outer surface of the wire passing shaft through an extending arm with elastic and sheet structure. It can automatically produce two states of sewing thread tension and relaxation during the sewing process. The sewing machine generates thread tension when sewing and taking up the thread to achieve the effect of tightening the thread and sewing the fabric tightly. In the loose state, there is no tension when feeding normally to ensure the accuracy of feeding. Smooth and avoid fabric wrinkling. The invention also provides a sewing machine.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and in particular relates to an intelligent thread tension balance device for sewing machines and the sewing machine. Background technique [0002] In the process of sewing fabric with a sewing machine, when the sewing thread is sewn with the sewing needle, the sewing thread needs to be tensioned and sometimes relaxed. Generally, the sewing thread needs to be relaxed when the needle enters, and it needs to be tensioned when it is pulled out, and the tension force It needs to adapt to the sewing speed and the thickness of the fabric, so as to ensure that there will be no thread breakage and the quality of the sewn products can be guaranteed. [0003] The thread tension of existing sewing machines is generally determined by mechanical adjustment, so the thread tension is relatively fixed, which cannot meet the different tensions required for high-speed and low-speed sewing, thick and thin m...

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Problems solved by technology

[0013] In addition, with the development of various material technologies at present, more and more technologies have formed the back-feeding of the textile industry, but the applicant found through searching that in the field of sewing machine technology, these "black technologies" that are back-feeding are mostly concentrated in In terms of electronic circuit technology, considering the characteristics of the sewing technology itself, the reliability and low cost of the mechanical structure should not be despised, which is not noticed in the current prior art

[0014] That is to say, the applicant found by searching the prior art that in the current prior art, sensing technologies such as circuit electronics are usually used to control the tension of the sewing thread, but few people make improvements based on the mechanical structure itself, because usually people think that , the mechanical structure itself may have a "deterioration" or "backward" prejudice, causing people to use electronic technology to solve related problems, that is to say, few people pay attention to reducing costs and improving reliability through mechanical mechanisms Improvements to seek relevant technical means, that is, after searching, the existing technology has given technical inspiration, and no one has found similar technical means

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