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Double-thread-loosening mechanism for sewing machine and sewing machine comprising the double-thread-loosening mechanism

A double thread loosening and sewing machine technology, which is applied to the thread cutting mechanism, sewing machine components, cloth pressing mechanism, etc. in the sewing machine, can solve the problem of no thread loosening, and achieve the effect of improving the thread loosening method

Active Publication Date: 2016-03-23
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the sewing machine with automatic thread trimming function has a thread loosening function when cutting the thread, but does not have a thread loosening function when lifting the presser foot

Method used

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  • Double-thread-loosening mechanism for sewing machine and sewing machine comprising the double-thread-loosening mechanism
  • Double-thread-loosening mechanism for sewing machine and sewing machine comprising the double-thread-loosening mechanism
  • Double-thread-loosening mechanism for sewing machine and sewing machine comprising the double-thread-loosening mechanism

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Embodiment Construction

[0048] A double thread release mechanism for a sewing machine and a sewing machine including the same according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to enable those skilled in the art to better understand the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to the particular embodiments described. Accordingly, the following examples and advantages are for illustration only and should not be viewed as limitations on the claims unless expressly stated in the claims.

[0049] figure 1 and figure 2 Shown is a double thread release mechanism for a sewing machine according to the present invention, the double thread release mechanism includes a thread...

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Abstract

The invention provides a double-thread-loosening mechanism for a sewing machine. The double-thread-loosening mechanism comprises a thread-shearing thread loosening mechanism and a presser-foot-lifting thread loosening mechanism, wherein the thread-shearing thread loosening mechanism and the presser-foot-lifting thread loosening mechanism are actuated through a thread-shearing steel wire rope (33) and a presser-foot-lifting steel wire rope (15) respectively. The thread-shearing steel wire rope (33) pulls a thread loosening crank (4) to rotate through a thread-shearing thread loosening connection board (31) hinged to the thread loosening crank (4), and a pin (20) fixed on the thread loosening crank (4) acts on a first lug (161) of a thread loosening board (16) due to the rotation of the thread loosening crank (4), so that the thread loosening board (16) moves to separate thread clamping pieces (211 and 212). The presser-foot-lifting steel wire rope (15) is directly connected with the thread loosening board (16), so that the thread loosening board (16) moves to separate thread clamping pieces (211 and 212) due to pulling of the presser-foot-lifting steel wire rope (15). The problem that the sewing machine only has one thread loosening function at present is solved.

Description

technical field [0001] The invention relates to the technical field of sewing, in particular to a double thread loosening mechanism for a sewing machine and a sewing machine comprising the double thread loosening mechanism. Background technique [0002] When the sewing machine performs automatic thread trimming, in order to ensure that the suture can be cut smoothly and prevent the sewing machine from taking off the thread when it starts sewing again, it is generally necessary to loosen the thread and make the thread while cutting the thread. At the end of sewing, in order to take out the sewing cloth conveniently, the sewing machine needs to have the function of lifting the presser foot to loosen the thread. [0003] But at present, the sewing machine with the automatic thread trimming function has a thread loosening function when the thread is trimmed, but there is no thread loosening function when the presser foot is lifted. However, ordinary sewing machines only have th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B47/04D05B65/00D05B29/02
CPCD05B29/02D05B47/04D05B65/00
Inventor 李卫超潘宝国宋施杓蔡炳清邱丽
Owner JACK SEWING MASCH CO LTD
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