Knee rest assembly on a sewing machine

Abstract

The invention provides a knee rest assembly on a sewing machine, which belongs to the technical field of machinery. It solves the problems that the automation degree of the existing mechanical knee rest assembly is not high enough. A knee rest assembly on a sewing machine, comprising a knee rest plate, a rotating block opposite to the knee rest plate, and a knee rest connecting rod connected between the knee rest plate and the rotating block, the knee rest plate is connected to the lower end of the knee rest connecting rod On the outside, the upper end of the connecting rod of the knee rest is bent and connected with the rotating block; the knee rest assembly also includes a support that can be fixed on the bottom of the sewing machine table and a Hall sensor fixed on the support, and the rotating block is located on one side of the support , the support is pierced with a rotating shaft, the rotating shaft is connected with the rotating block, the rotating shaft is connected with a linkage rod, and the linkage rod is fixed with a magnetic steel matched with the Hall sensor. The knee rest assembly has the advantages of higher degree of automation, simpler overall structure of the sewing machine, and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a sewing machine, in particular to a knee rest assembly on the sewing machine. Background technique [0002] During the working process of the sewing machine, the presser foot needs to be lifted every time a section of stitches is completed. Most of the existing industrial sewing machines use manual knee-controlled presser foot lifts, which are hinged on the lever to lift the lifter, and are lifted by the operator’s knee. It acts on the knee lifting jack rod to realize the work of lifting the presser foot. For example, a Chinese patent discloses a presser foot lifting mechanism for an overlock sewing machine [application number: 201320448549.8; authorized announcement number: CN203411766U]. , the fixed frame is fixed on the body of the overlock sewing machine, and a through hole is also opened on the fixed frame, and a rotating shaft capable of rotating around its own axis is ins...

AI Technical Summary

Problems solved by technology

However, because the presser foot lifting mechanism is completely mechanical, the degree of automation of the sewing machine is not high enough to meet the needs of the integrated mechatronic sewing machine. As a result, there are many parts in the entire presser foot lifting mechanism, and the transmission process is complicated. Moreover, due to the increase in parts, it will also lead to a higher failure rate and bring difficulties to maintenance.

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