An electronic middle presser mechanism of a sewing machine

Abstract

The present application relates to the technical field of sewing machine equipment, and relates to an electronic middle presser mechanism of a sewing machine, which includes a casing, a middle presser located under the casing, and a connecting rod structure connected to the middle presser, and A drive structure that drives the connecting rod structure to move; the connecting rod structure includes a pressing rod that passes through the casing and is connected with the intermediate presser foot, an intermediate presser foot pressing rod that slides with the pressing rod, The outer spring of the pressing rod that drives the pressing rod to move away from the direction away from the middle presser foot, and the elastic member respectively connected to the pressing rod and the pressing rod of the middle presser foot; the pressing rod One end of the outer spring is connected to the pressing rod, the other end is connected to the casing, and the intermediate presser rod is connected to the driving structure; when the intermediate presser encounters a thicker fabric, the intermediate presser rod It will drive the elastic member to undergo elastic deformation, so as to protect the connecting rod structure, reduce the damage of the pressing rod, and then reduce the failure rate of the sewing machine.

Description

technical field [0001] The present application relates to the field of sewing machine equipment, in particular to an electronic middle presser mechanism of a sewing machine. Background technique [0002] At present, sewing machine is to use one or more sewing threads to form one or more stitches on the fabric, so that one or more layers of fabric are interwoven or stitched together. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. [0003] The presser foot mechanism in the sewing machine currently on the market is divided into mechanical type and electronic type. The height and stroke of the mechanical presser foot need to be adjusted manually. After adjustment, it is fixed during the sewing process and cannot follow the sewing fabric. The thickness is automatically adjusted, and it is impossible to sew fabrics with multiple thicknesses; the electronic type uses a stepping m...

AI Technical Summary

Problems solved by technology

[0003] The presser foot mechanism in the sewing machine currently on the market is divided into mechanical type and electronic type. The height and stroke of the mechanical presser foot need to be adjusted manually. After adjustment, it is fixed during the sewing process and cannot follow the sewing fabric. The thickness is automatically adjusted, and it is impossible to sew fabrics with multiple thicknesses; the electronic type uses a stepping motor and a connecting rod structure to drive the intermediate presser to jump up and down, so as to realize the function of automatically adjusting the height and stroke of the presser during sewing

[0004] In view of the related technologies mentioned above, the inventor believes that: according to the thickness of the fabric, it will be preset in the motor system first. In the preset motor system, the beating distance of the intermediate presser foot is the same every time, and the position of the fabric part will be different. Inconsistent with the preset fabric thickness, when encountering a fabric larger than the preset value, the motor continues to drive the intermediate presser to press down, and because the connecting rod structure in the electronic presser mechanism is rigidly connected, the motor continues to maintain Rotation is easy to cause damage to the connecting rod structure

Images