Thread supply mechanism for sewing machine and sewing machine

Abstract

The invention provides a thread supply mechanism for a sewing machine and the sewing machine. The thread supply mechanism for the sewing machine comprises a thread take-up lever, a thread take-up spring and a thread tensioner sequentially arranged along the upper thread feed direction, wherein a thread supply quantity adjusting mechanism is arranged between the thread take-up lever and the thread take-up spring and comprises a first thread hook, a second thread hook and an adjusting disc arranged between the first thread hook and the second thread hook and synchronously acting with a spindle of the sewing machine; a third thread hook is positioned on the adjusting disc, and the distance from the third thread hook to the rotation center of the adjusting disc is adjustable; and the third thread hook changes the linear distance between the first thread hook, the third thread hook and the second thread hook along with the rotation of the adjusting disc so as to change the thread supply quantity between the first thread hook and the second thread hook. With a simple structure, the thread supply mechanism provided by the invention is easy to mount and adjust for use and suitable for sewing various kinds of cloth.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to a thread supply mechanism for the sewing machine and the sewing machine. Background technique [0002] At present, the thread take-up mechanism and its accessories on the sewing machine cannot be adjusted or the range of adjustment is very limited. Even some thread take-up levers change the thread take-up stroke by setting a plurality of holes, but the number of holes is also limited, and the change of the amount of thread supply is not very large. These reasons limit the adaptability of the sewing machine to the thickness of the sewing fabric, because generally speaking, thin materials require less thread supply to ensure beautiful stitches, while thick materials require more thread supply to ensure continuous threads, etc. Fault. Especially for those sewing equipment with high cost, the sewing adaptability of thin and thick materials is poor, which increases the procu...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a thread supply mechanism and a sewing machine for sewing machines, which are used to solve the problem in the prior art that the amount of thread supply cannot be adjusted arbitrarily according to the thickness of the cloth being sewn.

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