Sewing machine auxiliary device for automatically adjusting height of needle bar by using pressing force

Abstract

The invention relates to the technical field of sewing machine equipment, and discloses a sewing machine auxiliary device for automatically adjusting the height of a needle bar by using pressing force. The auxiliary device comprises a movable shaft. A needle sleeve is fixedly connected to the bottom side of the movable shaft. The side wall of the movable shaft is fixedly connected with a connecting pipe. The bottom end of the connecting pipe is fixedly connected with a movable sleeve. The side wall of the movable sleeve is fixedly connected with a connecting rod. The end, away from the movablesleeve, of the connecting rod is fixedly connected with a pressing column. When a sewing machine stops in the middle, the pressing column is pressed down, the side wall of the pressing column is clamped by a four-sided frame, the height of the pressing column becomes longer, and the pressing column can be closely attached to the top side of a backing plate, so as to prevent fabric from slipping and distorting sewing position. When the top of the needle sleeve cannot directly touch the pressing column, the pressing column is not subject to the pressing force, a depth value of the pressing column becomes smaller, a movable hook no longer hooks the movable ball, and the movable frame is affected by elastic force, tilts upwards and pushes the backing plate upward to raise the position of thebacking plate and to reduce the distance between the backing board and the needle sleeve.

Description

technical field [0001] The invention relates to the technical field of sewing machine equipment, in particular to an auxiliary device for sewing machines that automatically adjusts the height of a needle bar by using pressing force. Background technique [0002] The use of the sewing machine replaces the inconvenience of manual operation, and the stitches are neatly stitched. More importantly, the speed of the sewing machine is much faster than manual operation. You only need to place the fabric to be sewn on the pad of the sewing machine. When the sewing machine is used for a long time, the needle often penetrates clothes of various thicknesses, which may cause the needle to be sideways. A certain friction loss, or a certain position at the connection point, causes the needle to deform. [0003] If the operator finds that the fabric slips off in the middle of the operation, it is necessary to re-adjust the machine body to re-align the front needles, and reconnecting the st...

AI Technical Summary

Problems solved by technology

[0002] The use of the sewing machine replaces the inconvenience of manual operation, and the stitches are neatly stitched. More importantly, the speed of the sewing machine is much faster than manual operation. You only need to place the fabric to be sewn on the pad of the sewing machine. When the sewing machine is used for a long time, the needle often penetrates clothes of various thicknesses, which may cause the needle to be sideways. A certain friction loss, or there is a certain position at the connection point, causing the needle to deform

[0003] If the operator finds that the fabric slips off in the middle of the operation, it is necessary to re-adjust the machine body to re-align the front needles, and reconnecting the stitches at the front sewing marks may cause the sewing line to be unbalanced and affect the Aesthetic level, but also prone to disconnection, time-consuming and labor-intensive

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