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Sewing machine thread loosening device for removing bird nest structure and use method

A sewing machine and thread loosening technology, which is applied in the field of sewing machines, can solve problems such as broken needles and bottom threads, and achieve the effects of improving quality, ensuring aesthetics, and reducing costs

Active Publication Date: 2016-05-11
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a sewing machine that can solve the problems of broken needles and bobbin threads, and a thread loosening device for removing the bird's nest structure and its use method

Method used

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  • Sewing machine thread loosening device for removing bird nest structure and use method
  • Sewing machine thread loosening device for removing bird nest structure and use method
  • Sewing machine thread loosening device for removing bird nest structure and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one: see figure 1 -5:

[0039] A thread loosening structure for removing the bird's nest structure of a sewing machine, including a thread clamp 2 arranged on the machine head 1, the tail end of the thread clamp 2 is connected with a thread release device, and the thread release device is connected to the thread cutting drive device through a connecting mechanism The wire cutter driver 6 is connected;

[0040] One side of the thread-cutting driver is provided with a lower shaft, the thread-cutting cam 29 is arranged on the lower shaft, the thread-cutting drive assembly 17 of the thread-cutting device is located at one side of the lower shaft, and the thread-cutting drive assembly 17 is arranged on the thread-cutting drive assembly installation shaft 31 Up, the shaft is driven by the movable rod of the thread trimmer driver; when sewing starts, the thread trimmer driver 6 moves to drive the connecting mechanism to move and then drives the thread loosener to a...

Embodiment 2

[0074] The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the connecting mechanism of this embodiment adopts a link mechanism. Connector connection, also can realize loosening function.

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Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a sewing machine thread loosening device for removing a bird nest structure and a use method. The device comprises a thread holder arranged on a machine head, the tail end of the thread holder is connected with a thread loosening device, and the thread loosening device is connected with a thread shearing driver of a thread shearing device through a connecting mechanism. A lower shaft is arranged at one side of the thread shearing driver, a thread shearing cam is arranged on the lower shaft, and a thread shearing driving assembly of the thread shearing device is located on one side of the lower shaft. In the sewing process, the thread shearing driver acts to drive the connecting mechanism to act, and then the thread loosening device is driven to act on the thread holder to achieve the thread loosening action. An idle stroke segment is formed by a downward-recessed portion on the thread shearing cam, the thread shearing driving assembly does not conduct rotating action in the thread loosening process due to the idle stroke segment, and a thread is only loosened without being shorn. The thread shearing driver serves as a thread loosening driving source, an existing thread shearing driver is utilized for loosening the thread in the sewing process, the aim of driving two mechanisms through one driving source to achieve multiple functions is achieved, and cost is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a thread loosening device for removing a bird's nest structure of a sewing machine and a use method thereof. Background technique: [0002] When the sewing machine sews fabric, it is necessary to leave a certain length of thread ends at the eye of the machine needle when sewing, so as to ensure that the end of thread will not come out of the eye of the machine needle when sewing starts. A certain length of thread on the eye of the machine needle stays at the initial sewing position of the fabric when sewing starts, affecting the appearance of the sewing material. [0003] The current processing methods are as follows: [0004] A kind of processing mode is, when starting to sew, the end of the thread is manually pulled, and the end of the thread is left on the sewing material, and after the sewing work, the end of the thread is manually processed. [0005] Another way t...

Claims

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Application Information

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IPC IPC(8): D05B47/04D05B69/10
CPCD05B47/04D05B69/10
Inventor 万义明潘建国
Owner JACK SEWING MASCH CO LTD
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