Sewing machine and stitch-length adjusting and backstitch control method for sewing machine

A needle pitch adjustment and sewing machine technology, which is applied to the sewing machine control device, the mechanism for cutting the thread in the sewing machine, and the sewing machine components, etc., to achieve the effect of beautiful stitches, precise stitch size, and small interaction between dimensional tolerances and fit tolerances

Pending Publication Date: 2019-05-21
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the above-mentioned problems existing in the prior art, and provides a sewing machine and a method for adjusting the stitch length and reverse stitching of the sewing machine. Noise during forward and backward sewing changeover

Method used

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  • Sewing machine and stitch-length adjusting and backstitch control method for sewing machine
  • Sewing machine and stitch-length adjusting and backstitch control method for sewing machine
  • Sewing machine and stitch-length adjusting and backstitch control method for sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like figure 1 , figure 2 and image 3 As shown, the sewing machine includes a casing 1, an upper shaft 2, a feed shaft 3, a drive motor 4, and a needle pitch adjustment crank 5 arranged between the upper shaft 2 and the feed shaft 3. The stitch length adjustment crank 5 can swing and the upper shaft 2 is connected with the needle distance adjustment crank 5 through the feeding connecting rod 6; the output shaft of the drive motor 4 is fixed with a motor crank 7, and the output shaft of the drive motor 4 has a reference groove 41; the motor crank 7 and the needle distance adjustment crank 5 They are connected by an adjusting link assembly 8; the feed shaft 3 is fixed with an axel 10, and the axel 10 is connected with the pitch adjusting crank 5 by a crank link assembly 9.

[0045] Further, such as figure 1 and figure 2 As shown, the driving motor 4 in this embodiment is a stepping motor; the casing 1 is fixedly provided with a mounting plate 11, the driving motor 4...

Embodiment 2

[0051] This embodiment discloses a stitch length adjustment and backstitch control method of a sewing machine, which is characterized in that the control method includes the following steps:

[0052] a. Turn on the power, and before sewing the sewing machine, judge whether it is necessary to adjust the stitch length according to the sewing material and sewing process requirements;

[0053] b. If it is necessary to adjust the stitch length, adjust the required stitch length through the electric control parameters, and then set the number of stitches required for backtacking; if it is not necessary to adjust the stitch length, directly set the number of stitches for the required backtacking;

[0054] c. Depress the pedal to start sewing, and the front reinforcement seam will be automatically performed at the beginning of sewing;

[0055] d. After sewing, depress the pedal to give the thread trimming signal;

[0056] e. Electronic control automatically completes the rear reinfor...

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PUM

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Abstract

The invention provides a sewing machine and a stitch-length adjusting and backstitch control method for the sewing machine, and belongs to the technical field of garment manufacturing equipment. The technical problem that an existing stitch-length adjusting and backstitch control device is inaccurate, unreliable and the like is solved. The sewing machine comprises a machine shell, an upper shaft and a feeding shaft; a stitch-length adjusting crank capable of swinging is arranged between the upper shaft and the feeding shaft, and the upper shaft is connected with the stitch-length adjusting crank through a feeding connecting rod; a driving motor is fixedly arranged on the machine shell, a motor crank is fixedly arranged on an output shaft of the driving motor, a base groove is formed in theoutput shaft of the driving motor, and the motor crank is connected with the stitch-length adjusting crank through an adjusting connecting rod assembly; a shaft handle is fixedly arranged on the feeding shaft, and is connected with the stitch-length adjusting crank through a crank connecting rod assembly. According to the sewing machine and the stitch-length adjusting and backstitch control method for the sewing machine, stitch-length adjusting and front-stitch-and-backstitch conversion controlling are achieved through the driving motor, the automatic degree is high, operation is convenient,the stitch length can be frequently adjusted, the stitch length is accurate and stable, and the sewing effect is good.

Description

technical field [0001] The invention belongs to the technical field of garment manufacturing equipment, and relates to a sewing machine, in particular to a sewing machine and a needle distance adjustment and backstitch control method of the sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. Sewing machines are generally composed of four parts: feeding device, machine base, transmission and accessories. The movement of each mechanism is reasonably coordinated, and the cycle works to sew the sewing materials together. During the sewing process, the sewing machine sometimes uses the function of needle pitch adjustment and reverse stitching; Reinforced seams,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B27/22D05B69/18D05B69/02D05B65/00
Inventor 黄忠亮金丰东鲁亚东朱金聪
Owner JACK SEWING MASCH CO LTD
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