Knitting thread pre-stressing device of sewing machine

Abstract

The invention provides a knitting thread pre-stressing device of a sewing machine. The knitting thread pre-stressing device of the sewing machine comprises a thread guide seat, a pre-stressing supplypiece, a propping piece and a top cover, wherein the thread guide seat is provided with at least one accommodating groove; the accommodating groove is provided with a groove bottom; the pre-stressingsupply piece is made of an elastic material, is arranged in the accommodating groove and is provided with a reversing part; two sides of the reversing part are respectively connected with extending parts; the ends, connected with the reversing part, of the two extending parts are provided with abutting parts respectively; the reversing part is arranged at the groove bottom; the propping piece is arranged on the pre-stressing supply piece; the two abutting parts abut against the propping piece; and the top cover is arranged on the propping piece, is combined with the thread guide seat and is positioned on the propping piece, so that a threading space is formed between the top cover and the propping piece, and a knitting thread can pass through the threading space; Therefore, the pre-stressing supply piece is mainly made of the elastic material and is approximately V-shaped, so that the variation of the elastic force is relatively small, and proper linear pressure can be provided.

Description

Technical field[0001]The present invention relates to a related component of a sewing machine, particularly a woven seam line prefix device for a sewing machine.Background technique[0002]Generally, the sewing machine is equipped with a wire hypervisor, and the wire hypothetical providing device is used to provide proper premium of the weave, so that the weaving line can maintain proper tension, the sewing operation, generally prior art sewing machine Weaving line prefix devicePicture 11 As shown, including:[0003]The base 70 has at least one groove 71;[0004]Sponge 81 is disposed within the groove 71;[0005]Arrival 82, set on the sponge 81, so that the sponge 81 appeases;[0006]The top cover 83 is disposed on the top cover 82, and the top cover 83 and the adjusted member 82 are further formed between the threaded space 84, the threaded space 84 is supplied to allow the wiring 90 to be constructed, the top cover 83 faces the top piece 82 On one side, the two convex portions 831 are protr...

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned sponge 81 is prone to fatigue and deterioration after being used for a period of time, resulting in the inability to provide proper resistance force, and thus resulting in the inability to provide proper tension.

[0009] In addition, the two protrusions 831 of the top cover 83 are likely to interfere with the extension of the suture 90, and there is also a risk of pressing the suture 90.

[0010] Moreover, if the size of the two convex portions 831 of the top cover 83 is too large, it may cause the width of the threading space 84 to be too wide, so that sufficient tension cannot be provided for the suture thread 90. On the contrary, if the two convex portions of the top cover 83 If the size of 831 is too small, the convex part 831 may recover due to the restoring force of the metal, and the corresponding effect cannot be produced.

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