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Automatic thread cutting device of sewing machine

A sewing machine and sewing thread technology, which is applied in the direction of sewing machine control devices, sewing machine components, and mechanisms for cutting threads in sewing machines. The effect of control

Active Publication Date: 2015-06-10
JIAXING SHING RAY SEWING MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the problem that the thread cutting device of a general sewing machine uses a transmission structure of multiple connecting rods and cams to drive the thread cutting knife group, resulting in the inability to accurately control the thread cutting knife group, and to provide a sewing machine that can precisely control the thread cutting knife group Automatic thread cutting device

Method used

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  • Automatic thread cutting device of sewing machine
  • Automatic thread cutting device of sewing machine
  • Automatic thread cutting device of sewing machine

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with drawings and embodiments.

[0022] see figure 1 , figure 2 , image 3 and Figure 4 , which is a structural exploded view, a schematic appearance, a structural exploded view and a top view of a sewing machine in a preferred embodiment of the present invention, as shown in the figure: the present invention is an automatic thread cutting device for a sewing machine, which is installed on a zigzag sewing machine 10, The zigzag sewing machine 10 is mainly used for sewing lace, shoulder straps and general "Z" sewing. tangent component3 for tangents. The drive assembly 2 includes a stepper motor 21, a swing rod 22 pivotally connected to the stepper motor 21, and a reciprocating stroke connected to the stepper motor 21 and the swing rod 22 driven by the stepper motor 21. The push rod 23, the swing rod 22 includes a pivot portion 221 pivotally connected to the stepping motor 21, and a pivot portion ...

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Abstract

The invention relates to an automatic thread cutting device of a sewing machine. The sewing machine is provided with a sewing platform. The automatic thread cutting device is characterized in that the automatic thread cutting device comprises a driving component and a thread cutting component, the driving component comprises a stepping motor, a swinging rod which is pivoted with the stepping motor and a push rod which is connected with the stepping motor and the swinging rod and is driven by the stepping motor to make a reciprocating stroke. The thread cutting component is arranged on the sewing platform and comprises a thread hooking knife and a thread cutting knife, wherein the thread hooking knife is connected with the swinging rod, moves back and forth due to the linkage with the swinging rod to hook back a sewing thread and is provided with a thread hooking path, and the thread cutting knife is arranged on the thread hooking path and is used for cutting the sewing thread when the thread hooking knife hooks back the sewing thread.

Description

technical field [0001] The invention relates to an automatic thread cutting device, in particular to a direct-drive automatic thread cutting device for a zigzag sewing machine. Background technique [0002] Generally, when the sewing machine is near the end of sewing, the sewing thread will be cut off by the thread trimming mechanism to wait for the next sewing job. For example, the Republic of China Patent No. M383002 is a thread trimming structure of a sewing machine with three arms and wrists. It mainly corresponds to the thread tangent structure on the sewing machine. The tangent structure includes a drive group that is controlled by a signal to drive the operation of the tangent structure. Move back and forth, so that the ejector rod drives the connecting rod group to move the hook part of the hooking and cutting group, and pulls the tail of the work piece back to be cut off by the cutter. There is no need to trim the thread manually to achieve automatic thread trimming...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B65/00D05B69/10
Inventor 卓瑞荣
Owner JIAXING SHING RAY SEWING MACHINE
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