Noise-reduction buffer mechanism for sewing machine backstitch

Abstract

The invention belongs to the technical field of sewing machines, in particular to a noise-reduction buffer mechanism for sewing machine backstitch. The noise-reduction buffer mechanism comprises a stitch length adjusting mechanism and a backstitch electromagnet arranged on one side of a feeding adjusting shaft of the stitch length adjusting mechanism. The backstitch electromagnet comprises a shell and a frame arranged outside the shell, a coil is arranged in the shell, an iron core penetrates through the shell, and the head portion and the tail portion of the iron core extend out of the frame. The head portion of the iron core is connected with the feeding adjusting shaft, the iron core is connected with a buffer device through a buffer installation support, and the buffer device is arranged on one side of the frame. The buffer device reduces abrasion of parts, the service life of the electromagnet is prolonged, and product quality is improved; a buffer shaft is arranged in a buffer installation base, a cover plate is arranged, and the noise of the buffer device can be reduced; the position of a check ring on the buffer shaft can be adjusted according to actual buffer requirements to change the upper-lower buffer effect.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a noise-reducing buffer mechanism for reverse sewing of a sewing machine. Background technique: [0002] When the sewing machine is sewing forward and backward, the electromagnet telescopically drives the feed adjustment shaft to rotate, and the feed adjuster is driven to swing through the adjustment crank and the feed swing rod, and the feed adjustment stud is limited by the feed adjuster. The structure of the electromagnet is: including a shell and a frame arranged outside the shell, a coil is arranged inside the shell, an iron core is arranged inside the shell and the head and tail protrude out of the frame respectively; there are electromagnets with this structure The following defects: When the electromagnet is stretched, the iron core circular table in the electromagnet collides with the inner wall of the electromagnet shell; when it shrinks, the nut will collide w...

AI Technical Summary

Problems solved by technology

The structure of the electromagnet is: including a shell and a frame arranged outside the shell, a coil is arranged inside the shell, an iron core is arranged inside the shell and the head and tail protrude out of the frame respectively; there are electromagnets with this structure The following defects: When the electromagnet is stretched, the iron core circular table in the electromagnet collides with the inner wall of the electromagnet shell; when it shrinks, the nut will collide with the outer wall of the electromagnet shell; will collide with the feed regulator

The above-mentioned various impacts produce a lot of noise, and at the same time, long-term impacts will cause wear and tear, and the accuracy will decrease after the parts are worn.

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