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Sewing machine and stitch length adjusting mechanism thereof

A needle pitch adjustment and sewing machine technology, applied in the direction of sewing machine components, cloth feeding mechanism, sewing equipment, etc., can solve the problems of inconvenient operation, unsuitable sewing machine, complex structure of stitch pitch adjustment mechanism, etc., and achieve easy operation and simple structure Effect

Active Publication Date: 2018-01-09
JACK SEWING MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the structure of the needle pitch adjustment mechanism of these sewing machines in the prior art is comparatively complicated, and operation is inconvenient, is not suitable for some sewing machines

Method used

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  • Sewing machine and stitch length adjusting mechanism thereof
  • Sewing machine and stitch length adjusting mechanism thereof
  • Sewing machine and stitch length adjusting mechanism thereof

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Embodiment Construction

[0042] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0043] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper"...

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Abstract

The invention relates to a sewing machine and a stitch length adjusting mechanism thereof. In use of the stitch length adjusting mechanism to adjust stitch length, engaging teeth of a connection blockcan be separated from a transmission gear just by moving a slider, a connection disc is rotated, a shaft sleeve, arranged eccentrically relative to a spindle, on the connection disc may drive a rotary sleeve and a driving connection rod to rotate together around a pin parallel to the spindle, the amount of eccentricity of the driving connection rod relative to the rotational center is adjusted, and accordingly, the transmission relationship between the spindle and cloth feeding teeth can be adjusted; since the movement of the spindle remains same, the transmission relationship between the spindle and the cloth feeding teeth can be adjusted by adjusting the amount of eccentricity of the rotational center of the driving connection rod relative to the spindle; therefore, a distance of the cloth feeding teeth per movement is adjusted to finally adjust the stitch length.

Description

technical field [0001] The invention relates to a sewing machine and a needle distance adjusting mechanism thereof, belonging to the technical field of industrial sewing machines. Background technique [0002] When the sewing machine is performing sewing operations, the feed dog reciprocates to move the fabric forward, and each time the feed dog moves the fabric forward a certain distance, the machine needle performs a sewing operation. Therefore, the needles sewn on the fabric The pitch is determined by the distance that the feed dog moves each time. The needle pitch can be adjusted by adjusting the distance that the feed dog moves each time. There are some mechanisms that can be used to adjust the stitch size in the prior art, such as the cloth feeding assembly in the utility model patent of China with the application number 20102065187.8, which can adjust the size of the stitch. However, the structures of the needle pitch adjustment mechanisms of these sewing machines i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B27/22
Inventor 李卫超王志洪建敏宋施杓
Owner JACK SEWING MASCH CO LTD
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