Sewing material thickness detection device and sewing machine

Abstract

The invention provides a sewing material thickness detection device. The device comprises an electronic control module, a main motor, a detection sensor, a detected piece, a connecting lever frame anda detection piece, wherein the detected piece is arranged opposite to the detection sensor, the connecting lever frame is provided with a fixed swing fulcrum, and the detection piece is used for being in contact with a sewing material. The two ends of the connecting lever frame are provided with a first mounting part and a second mounting part respectively; the detected piece and the detection piece are mounted on the first mounting part and second mounting part of the connecting lever frame respectively; the detected piece, the fixed swing fulcrum of the connecting lever frame and the detection piece are sequentially arranged in the length direction of the connecting lever frame, and the detection sensor and the main motor are both connected with the electronic control module. During sewing, when the thickness of the sewing material is increased or decreased, the detection piece can ascend or descend correspondingly, so that output signals of the detection sensor are changed correspondingly; the electronic control module can judge whether the thickness of the sewing material is changed or not according to the output signals of the detection sensor and correspondingly reduce or increase the rotation speed of the main motor to ensure the sewing quality.

Description

technical field [0001] The invention relates to the field of sewing machine detection, in particular to a sewing material thickness detection device and a sewing machine including the sewing material thickness detection device. Background technique [0002] In the current sewing machines on the market, the main shaft is driven by the main motor to rotate, and the main shaft drives each mechanism in the sewing machine to operate to realize sewing. After the user places the sewing material before sewing starts, the user steps on the pedal to a certain extent to drive the sewing machine to run, and the sewing machine will sew at a certain speed. The rotation speed of the main motor is adjusted by the user through the electronic control module, and the upper limit rotation speed of the main motor is set. Usually, the sewing machine sews at the set maximum speed during the sewing process. During the sewing process, the material feeding in the sewing machine The teeth reciprocall...

AI Technical Summary

Problems solved by technology

At present, ordinary sewing machines cannot recognize the characteristics of thin materials, thick materials, and over-stems, so that the sewing machine still keeps sewing at a constant sewing speed when the sewing material becomes thicker, the sewing material becomes thinner, or the sewing material is over-stemmed. Sewing, but unable to make corresponding adjustments to the sewing speed, resulting in unstable pressure of the presser foot, unstable feeding, retention of sewing materials, sudden increase in force on the needle or broken needles, etc. Then there will be problems such as accumulation of sewing materials, dense needle pitch, overheating of machine needles, etc., which will seriously affect the aesthetics of sewing and even cause the sewing materials to be scrapped.

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