Trimming device of sewing machine

Abstract

The invention discloses a trimming device of a sewing machine. The trimming device comprises a power device. The power device is connected with a fixing piece. The fixing piece is connected with one end of a linkage arm through a linkage shaft, and the other end of the linkage arm is fixedly connected with a cutter bar in the axial direction. The power device can drive the cutter bar to rotate. One end of the cutter bar is fixedly provided with a movable blade, and one side of the movable blade is fixedly provided with a static blade. The cutter bar can drive the movable blade bar to rotate relative to the static blade when rotating so that the movable blade can make contact with the static blade to form cutting force. The static blade is fixedly arranged on a knife rest, one side of the knife rest is fixedly provided with a thread suction pipe, and a thread suction opening of the thread suction pipe is located on one side of the static blade. The thread suction pipe is connected with a dust collection device so that the thread suction opening of the thread suction pipe can generate suction force. By means of the trimming device, thread residues can be cleaned away while being trimmed away, and thus sewing efficiency is guaranteed; meanwhile, the suction force generated in the thread suction opening can straighten thread ends, and thread ends trimmed by the movable blade are made to be neater.

Description

technical field [0001] The invention relates to an accessory of a sewing machine, in particular to a thread trimmer of a sewing machine. Background technique [0002] Existing thread trimmers of sewing machines only have the function of thread trimming. After trimming the stitched fabric, the thread ends will remain on the workbench, and the thread ends on the workbench can only be removed manually by using a vacuum tube. If the cleaning work is carried out after the thread ends are cut off, the sewing work needs to be stopped before proceeding, resulting in a reduction in sewing efficiency; if the thread ends are not cleaned at the first time, the sewing work will be affected. And ultimately affect the sewing quality. [0003] In addition, the moving blade in the thread trimming device will loosen after repeated cutting work, so that the gap between it and the static blade will become larger and larger, which will affect the cutting force formed between the moving blade an...

AI Technical Summary

Problems solved by technology

[0002] Existing thread trimming devices for sewing machines only have the function of thread trimming. After trimming the stitched fabric, the thread ends will remain on the workbench, and the thread ends on the workbench can only be removed manually by using a vacuum tube.

If the cleaning work is carried out after cutting off the thread ends, it is necessary to stop the sewing work before proceeding, resulting in a reduction in sewing efficiency; if the thread ends are not cleaned up at the first time, the sewing work will be affected. And ultimately affect the sewing quality

[0003] In addition, the moving blade in the thread trimming device will loosen after repeated cutting work, so that the gap between it and the static blade will become larger and larger, which will affect the cutting force formed between the moving blade and the static blade. Can't cut the thread well

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