Sewing machine

Abstract

The invention discloses a sewing machine with a flexible middle presser foot driving mechanism, relates to the technical field of sewing machine accessories, and solves the problems that most of existing presser foot driving mechanisms are integrally installed in a machine head, and left-right and up-down adjustment can be conducted on presser feet only by opening a machine cover, so that the operation process is tedious, inconvenient and laborious. The flexible middle presser foot driving mechanism of the sewing machine comprises a sewing machine body; the sewing machine body comprises a presser foot arm, a worm wheel and a connecting rod; a machine needle is arranged at the bottom of the machine head at the front end of the sewing machine body; the presser foot arm is arranged on the rear side of the machine needle in a spaced manner; the worm wheel is rotationally inserted in the presser foot arm at the bottom of a worm rod in a penetration manner; the connecting rod is rotatably mounted on a circumferential outer ring of the worm wheel; and an epsilon-type butt joint block is rotatably connected to the tail end of the connecting rod in an inserted manner. The worm rod can directly rotate forwards and reversely to drive the epsilon-type butt-joint block to slide up and down, and the height of the presser foot is adjusted, so that the trouble of disassembling the machine cover to adjust lifting of the presser foot is omitted.

Description

technical field [0001] The invention relates to a sewing machine, and also relates to the technical field of sewing machine accessories, in particular to a flexible intermediate presser foot driving mechanism of a sewing machine. Background technique [0002] The intermediate presser foot is mainly used in some special sewing machines, such as pattern machines, tacking machines, template machines, etc., and is a very important moving part on a sewing machine. The intermediate presser is driven by a motor or a mechanical cam to move up and down, and has a certain synchronous relationship with the machine needle. When the needle leaves the sewing material, the intermediate presser foot will continue to press the sewing material, and when the needle rises to a certain height, the intermediate presser foot will leave the sewing material again to ensure the formation of stitches. When sewing down products, the rising time of the intermediate presser foot should be later, the ear...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a flexible intermediate presser foot driving mechanism of a sewing machine to solve the above-mentioned background technology. Most of the driving adjustment mechanisms are integrated and installed in the machine head. It is necessary to open the machine cover to adjust the presser foot from left to right, up and down, and the operation process is cumbersome. inconvenient and laborious problem

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