Automatic thread shearing mechanism of sewing machine and sewing machine

A thread-cutting mechanism and sewing machine technology are applied to the thread-cutting mechanism, sewing machine components, sewing equipment and other directions in sewing machines, which can solve problems such as easy jamming, and achieve the effects of improving assembly efficiency, low assembly difficulty, and good assembly vision.

Pending Publication Date: 2019-01-18
ZHEJIANG MAQI SEWING MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But above-mentioned thread trimming mechanism still has following defective:
The side wall of the thread trimming drive crank is partially stressed, and it deviates far from the axis of the thread trimming shaft, so there is a risk of easy jamming

Method used

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  • Automatic thread shearing mechanism of sewing machine and sewing machine
  • Automatic thread shearing mechanism of sewing machine and sewing machine
  • Automatic thread shearing mechanism of sewing machine and sewing machine

Examples

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Embodiment Construction

[0030] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0031] Such as figure 1 , figure 2 , image 3 As shown, the automatic thread trimming mechanism includes a lower shaft 1 and a thread trimming shaft 2 parallel to each other, the lower shaft 1 is rotatably arranged on the bottom plate 29 of the sewing machine, and the lower shaft 1 is fixed with a thread trimming cam 3, and the thread trimming cam 3 The outer peripheral surface has a line cutting section 4 and a forced knife return section 5 . In this embodiment, the thread-cutting cam 3 is preferably a two-piece structure, which is divided into a thread-cutting body and a forced return knife body. , Screws can be designed in the part of forced return to the cutter body. As another solution, the thread-cutting cam 3 c...

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PUM

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Abstract

The invention belongs to the technical field of sewing equipment, and relates to an automatic thread shearing mechanism of a sewing machine and the sewing machine. The technical problems that an existing automatic thread shearing mechanism is likely to be stuck and the like are solved. The automatic thread shearing mechanism comprises a lower shaft and a thread shearing shaft, the lower shaft is rotationally arranged on a bottom plate of the sewing machine, and a thread shearing cam is fixed to the lower shaft; the thread shearing cam is provided with a thread cutting section and a forced cutter returning section; the thread shearing shaft is rotationally arranged on the bottom plate of the sewing machine, and a forced cutter returning crank is fixed to the thread shearing shaft; a connecting hole which is parallel to the thread shearing shaft is formed in the forced cutter returning crank; a thread shearing driving crank is further slidably arranged on the thread shearing shaft, and aconnecting pin which is in sliding fit with the connecting hole is arranged on the thread shearing driving crank; the thread shearing shaft is connected with a thread shearing movable cutter assemblyand is provided with a sliding sleeve, and the bottom plate of the sewing machine is fixedly provided with a driving source capable of driving the sliding sleeve to slide in the direction of the thread shearing driving crank. According to the mechanism, the phenomena of blocking and the like can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of sewing equipment, and relates to an automatic thread trimming mechanism of a sewing machine and the sewing machine. Background technique [0002] In the thread trimming mechanism of the existing sewing machine, the thread trimming component needs to realize the following functions: the switching function between the thread trimming position and the non-thread trimming position, the forced reset function, and the like. [0003] As my country's patent CN 108385293 A discloses a thread trimming drive assembly, a thread trimming mechanism and a sewing machine, the power transmission mechanism includes a thread trimming shaft, a thread trimming drive crank, a drive shaft and a driving cam; a forced reset arm is fixed on the thread trimming shaft; The driving crank is sleeved on the thread trimming shaft, and is slidingly connected with the thread trimming shaft through a sliding connection structure. The drivin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B65/00
CPCD05B65/00
Inventor 何清颜慧军
Owner ZHEJIANG MAQI SEWING MACHINE
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