CN112391749A

CN112391749A - Sewing thread pre-stressing device of sewing machine

Info

Publication number: CN112391749A
Application number: CN201910763604.4A
Authority: CN
Inventors: 曾贤长
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2021-02-23
Anticipated expiration: 2039-08-19
Also published as: CN112391749B

Abstract

The invention provides a pre-force device for a sewing thread of a sewing machine, which comprises a thread guide seat, a pre-force supply piece, 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-force supply piece is made of elastic materials, the pre-force supply piece is arranged in the accommodating groove, the pre-force supply piece is provided with a reverse part, two sides of the reverse part are respectively connected with an extension part, one end of each extension part, which is connected with the reverse part, is respectively provided with a propping part, the reverse part is arranged at the groove bottom, the propping piece is arranged on the pre-force supply piece, and the two propping parts lean against the; the top cover is arranged on the abutting piece, the top cover is combined with the wire guide seat and is positioned on the abutting piece, so that a threading space is formed between the top cover and the abutting piece, and the threading space is used for a knitting thread to pass through; therefore, the invention mainly makes the prestress supplying piece made of elastic material and in a V shape, so that the variation of the elasticity is relatively small, and the proper line pressure can be provided.

Description

Sewing thread pre-stressing device of sewing machine

Technical Field

The invention relates to a related part of a sewing machine, in particular to a stitch line pre-stressing device of the sewing machine.

Background

A thread pre-force providing device is provided in a general sewing machine, and the thread pre-force providing device is used to provide a proper pre-force to a thread to keep the thread in a proper tension for subsequent sewing operation, and the thread pre-force device of a general prior art sewing machine is shown in fig. 11 and comprises:

a base 70 having at least one groove 71;

a sponge 81 disposed in the groove 71;

the propping piece 82 is arranged on the sponge 81 and used for propping the sponge 81;

the top cover 83 is disposed on the supporting member 82, a threading space 84 is further formed between the top cover 83 and the supporting member 82, the threading space 84 is provided for the penetration of a knitting thread 90, one side of the top cover 83 facing the supporting member 82 is convexly provided with two convex portions 831, and the two convex portions 831 are supported on the other side of the supporting member 82 facing the sponge 81.

Therefore, when the suture line 90 passes through the threading space 84, the sponge 81 provides an upward force to the abutting member 82 to move the abutting member 82 toward the top cover 83, so as to clamp the suture line 90 in the threading space 84, thereby achieving the purpose of providing proper tension to the suture line 90.

However, the sponge 81 is easily fatigued and deteriorated after a period of time, and thus cannot provide a proper propping force, and further cannot provide a proper tension.

In addition, the two convex portions 831 of the top cover 83 easily interfere with the extension of the sewing line 90, and there is a risk of reaching the sewing line 90.

Further, if the size of the second protrusion 831 of the top cover 83 is too large, the width of the threading space 84 may be too wide to provide a sufficient tension of the stitch line 90, whereas if the size of the second protrusion 831 of the top cover 83 is too small, the protrusion 831 may be restored by a restoring force of metal, and thus a corresponding effect may not be generated.

Disclosure of Invention

The invention provides a pre-stressing device for a sewing thread of a sewing machine, which mainly aims to endow the sewing thread with proper tension.

Another object of the present invention is to prolong the service life of the product and to avoid fatigue of the wire prestressing device.

To achieve the above object, the present invention provides a stitch line prestressing device for a sewing machine, comprising:

the wire base is provided with at least one accommodating groove, and the accommodating groove is provided with a groove bottom;

the prestress supplying piece is made of elastic materials and arranged in the accommodating groove, the prestress supplying piece is provided with a reversing part, two sides of the reversing part are respectively connected with the extending parts, the other ends of the two extending parts connected with the reversing part are respectively provided with abutting parts, and the reversing part is arranged at the bottom of the groove;

the abutting part is arranged on the prestress supplying part, and the two abutting parts abut against the abutting part; and

the top cover is arranged on the abutting piece and combined with the wire guide seat, so that a threading space is formed between the top cover and the abutting piece, and the threading space is used for a suture to pass through.

The elastic material is characterized in that the prestress device of the sewing machine mainly provides proper elasticity by the prestress supplying piece, and the prestress supplying piece is made of the elastic material and is approximately V-shaped, so that the elasticity has relatively small variation, the prestress device can be used for penetrating the knitting lines with different diameters in the threading space, the knitting line with a larger diameter can not provide too large abutting force when penetrating the threading space, the thread pressure is proper, and the knitting line is prevented from being buckled due to too large thread pressure or knotted due to too small thread pressure.

In addition, the prestress supplying piece is made of elastic materials, so that elastic fatigue of the lead prestress supplying device can be effectively avoided.

Drawings

Fig. 1 is an assembled perspective view of the present invention.

Fig. 2 is an exploded view of one embodiment of the present invention.

Fig. 3A is an exploded view of another embodiment of the first embodiment of the present invention.

Fig. 3B is an exploded view of another embodiment of the first embodiment of the present invention.

Fig. 4 is a cross-sectional view of a first embodiment of the present invention.

Fig. 5 is a cross-sectional view of the first embodiment of the present invention at another angle.

Fig. 6 is an exploded view of a second embodiment of the present invention.

Fig. 7 is an exploded view of a third embodiment of the present invention.

Fig. 8 is an exploded view of a fourth embodiment of the present invention.

Fig. 9 is a cross-sectional view of a fifth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a preferred embodiment of the invention.

Fig. 11 is a cross-sectional view of the prior art.

Description of the symbols in the drawings:

the prior art is as follows:

base 70 groove 71

Sponge 81 abutting piece 82

Top cover 83 convex part 831

Threading space 84 suture line 90

The invention comprises the following steps:

wire holder 10 containing groove 11

Long side 11A and short side 11B

Groove bottom 12 limiting groove 13

Pre-load supply member 20 reversing part 21

Extension 22 groove 221

The abutting part 23 abuts against the piece 30

First side 31 top 32

Second side 33 Top cover 40

Side end surface 411 of cover 41

Stopper 43 of engaging part 42

Spacing body 431 threading space 50

Threading hole 51 preload supply member 60

The first pushing portion 61 and the turning portion 62

The second abutting portion 63 stitches L

Longitudinal X and transverse Y

Height direction Z

Detailed Description

The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The present invention provides a stitch line pre-stressing device of a sewing machine, as shown in fig. 1 to 10, comprising:

the wire guide seat 10 is provided with at least one accommodating groove 11, the accommodating groove 11 is provided with a groove bottom 12, preferably, the wire guide seat 10 is provided with a plurality of accommodating grooves 11 along the longitudinal direction X, each accommodating groove 11 is a rectangular groove body, the accommodating groove 11 is provided with a long side 11A along the longitudinal direction X and defines a transverse direction Y perpendicular to the longitudinal direction X, and the accommodating groove 11 is provided with a short side 11B along the transverse direction Y;

in one embodiment, the thread guide 10 is a separate component and is installed at a predetermined position of the sewing machine.

In another embodiment, the thread guide is part of the sewing machine 10.

The prestress supplying piece 20 is made of an elastic material, namely a material complying with hooke's law, the prestress supplying piece 20 is arranged in the accommodating groove 11, the prestress supplying piece 20 is provided with a reverse part 21, the reverse part 21 is arranged at the groove bottom 12, two sides of the reverse part 21 are respectively connected with the extending parts 22, an included angle is arranged between the two extending parts 22, the prestress supplying piece 20 is generally in a V shape, the other ends of the two extending parts 22 connected with the reverse part 21 are respectively provided with abutting parts 23, and preferably, the extending direction of the abutting parts 23 is perpendicular to the extending direction of the extending parts 22;

in a preferred embodiment, the groove bottom 12 is concavely provided with a limiting groove 13, the limiting groove 13 is located at the center of the accommodating groove 11 along the long side 11A, the limiting groove 13 is a long groove, the limiting groove 13 extends along the transverse direction Y, and the reversing part 21 is disposed in the limiting groove 13;

preferably, the abutment portion 23 extends along the transverse direction Y.

Preferably, the extension 22 has a direction of extension with a component of the longitudinal direction X.

Preferably, the included angle is less than 180 degrees.

The abutting part 30 is arranged on the prestress supplying part 20, the two abutting parts 23 abut against the abutting part 30, so that the force can be transmitted between the abutting part 30 and the prestress supplying part 20, the abutting part 30 can be a rectangular sheet body, in a preferred embodiment, the abutting part 30 is provided with a first side part 31, a top part 32 and a second side part 33 which are connected, one side of the top part 32 is connected with the first side part 31, the other side of the top part 32 is connected with the second side part 33, the joint of the first side part 31 and the second side part 33 with the top part 32 is provided with an approximately vertical included angle, so that the abutting part 30 is in a reversed U shape in a side view, and the two abutting parts 23 abut against the top part 32;

the top cover 40 is arranged on the abutting piece 30, the top cover 40 is fixedly arranged on the wire guide seat 10, the top cover 40 is provided with a covering part 41 and a clamping part 42 which are connected, the clamping part 42 is fixedly combined with the wire guide seat 10 to prevent the top cover 40 from moving and tilting, the covering part 41 is arranged at the other side of the abutting piece 30 facing the prestress supplying piece 20, in other words, the covering part 41 covers the abutting piece 30, a threading space 50 is formed between the top cover 40 and the abutting piece 30, the width of the threading space 50 is controlled through the displacement of the abutting piece 30, the threading space 50 is used for a thread L to pass through, and the thread L passes through the threading space 50 along the transverse direction Y;

in the preferred embodiment, the top cover 40 further has a position-limiting portion 43 on one side end surface 411 of the covering portion 41, the position-limiting portion 43 has two position-limiting bodies 431, the two position-limiting bodies 431 extend along the height direction Z, a threading hole 51 is formed between the two position-limiting bodies 431, the two threading holes 51 are communicated with the threading space 50, and the positions of the two threading holes 51 correspond to each other, so that the condition that the knitting thread L can only pass through the threading space 50 through the two threading holes 51 to limit the position of the knitting thread L in the longitudinal direction X is limited, the knitting thread L cannot swing randomly, the extension of the knitting thread 90 is not interfered, and the risk of pressing the knitting thread 90 can be effectively avoided.

Preferably, the wire holder 10, the pre-force supplying member 20, the abutting member 30 and the top cover 40 are defined to be stacked along a height direction Z perpendicular to the transverse direction Y and the longitudinal direction X, and since the top cover 40 is fixed, the width of the threading space 50 is controlled by the displacement of the abutting member 30 along the height direction Z.

In another implementation aspect, as shown in fig. 3B, the difference between the above aspects is that the two abutting portions are disposed at the groove bottom, and the inverted portion abuts against the abutting member.

In the first embodiment of the present invention, as shown in fig. 3A, the pre-force supplying member 20 is a V-shaped elastic sheet with a reverse-folding shape, the reverse-folding portion 21 is located at the reverse-folding position of the elastic sheet, the two extending portions 22 are two sides of the elastic sheet extending along different directions, and the two abutting portions 23 are two end edges of the elastic sheet respectively.

In a second embodiment of the present invention, as shown in fig. 6, the pre-force supplying member 20 is a torsion spring, the torsion spring is generally V-shaped, the reversing portion 21 is a coil of the torsion spring, the two extending portions 22 are two arms extending from the coil of the torsion spring, and the two abutting portions 23 are respectively connected to the reverse bending portions of the ends of the two arms.

In the third embodiment of the present invention, as shown in fig. 7, the pre-force supplying member 20 is made of a bent wire having a substantially V-shape, and the reverse bending portion 21 is formed at the reverse bending portion of the bent wire.

In a fourth embodiment of the present invention, as shown in fig. 8, the pre-force supplying member 20 is a V-shaped elastic sheet in a reverse-folding type, the reverse-turning portion 21 is located at a reverse-folding position of the elastic sheet, the two extending portions 21 are two sides of the elastic sheet extending along different directions, the extending portions 21 have a plurality of grooves 221 to reduce the weight of the pre-force supplying member 20 and control the elastic force of the pre-force supplying member 20, and the two abutting portions 23 are two end edges of the elastic sheet respectively.

In the fifth embodiment of the present invention, as shown in fig. 9, another type of the pre-force supplying member 60 is further provided, which is made of an elastic material, that is, a material complying with hooke's law, the pre-force supplying member 60 is disposed in the accommodating cavity 11, the pre-force supplying member 60 has a first pushing portion 61, a turning portion 62 and a second pushing portion 63 connected in sequence, the extending directions of the first pushing portion 61 and the second pushing portion 63 are parallel, an included angle is formed between the first pushing portion 61 and the turning portion 62, an included angle is formed between the second pushing portion 63 and the turning portion 62, so that the first pushing portion 61, the turning portion 62 and the second pushing portion 63 are in a substantially Z-shaped form in side view, the first pushing portion 61 is disposed on the bottom 12, the second pushing portion 63 abuts on the top 32, thereby providing a compression and reset margin between the first pushing portion 61 and the turning portion 62 and between the second pushing portion 63 and the turning portion 62, thereby providing a preload to the suture.

As can be seen from the foregoing, the embodiments of the stitch line pre-force device of the sewing machine of the present invention mainly provide proper elasticity by the pre-force supplying member 20, and since the pre-force supplying member 20 is made of an elastic material and is generally V-shaped, the variation of the elasticity is relatively small, so that the device can accommodate the situation that the stitch lines L with different thread diameters are inserted into the threading space 50, and the stitch line L with a larger thread diameter does not provide too large abutting force when penetrating through the threading space 50, so as to make the thread pressure proper, and avoid the situation that the woven fabric is wrinkled due to too large thread pressure or the stitch line is knotted due to too small thread pressure.

Furthermore, in each embodiment of the stitch line pre-force device of the sewing machine of the present invention, the extending portions 22 on both sides of the pre-force supplying member 20 extend evenly, so that the elastic force is evenly distributed on both sides of the propping member 30 along the longitudinal direction X, and the propping portion 23 evenly distributes the force on both sides of the propping member 30 along the transverse direction Y, thereby effectively achieving the effect of even force supply.

In summary, the above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A weaving suture prestressing device of a sewing machine is characterized in that, comprising:

The wire seat has at least one accommodating groove, and the accommodating groove has a groove bottom;

The pre-force supplying piece is made of elastic material, the pre-force supplying piece is arranged in the accommodating groove, the pre-force supplying piece has a reversing part, and the two sides of the reversing part are respectively connected to the extension parts, Two other ends of the extension part connected to the reversing part respectively have abutting parts, and the reversing part is arranged at the bottom of the groove;

an abutting member, disposed on the pre-force supplying member, and the two abutting portions abut against the abutting member; and

a top cover, arranged on the abutting member, the top cover is combined with the wire seat, so that a threading space is formed between the top cover and the abutting member, and the threading space is used for stitching pass through.

2 . The pre-tensioning device for the stitching thread of the sewing machine according to claim 1 , wherein a limiting groove is concavely formed at the bottom of the groove, and the reversing portion is arranged in the limiting groove. 3 .

3 . The pre-tensioning device for stitching thread of a sewing machine according to claim 2 , wherein a plurality of the accommodating grooves are formed in the wire seat along the longitudinal direction, and each of the accommodating grooves is a rectangular groove body. 4 . The accommodating groove has a long side along the longitudinal direction, and the direction perpendicular to the longitudinal direction is defined as the transverse direction, the groove body has a short side along the transverse direction, and the limiting groove is located along the accommodating groove along the longitudinal direction. At the position of the center of the long side, the limiting groove extends along the lateral direction.

4 . The prestressing device for stitching thread of a sewing machine according to claim 1 , wherein the top cover has a covering part and a clamping part that are connected, and the clamping part is fixedly combined with the wire seat, so that the The covering portion is located on the other side of the abutting member facing the pre-force supplying member.

5 . The knitting thread pre-tensioning device of a sewing machine according to claim 1 , wherein the extending direction of the abutting portion and the extending direction of the extending portion are perpendicular to each other. 6 .

6 . The prestressing device for weaving sutures of a sewing machine according to claim 1 , wherein the abutting member is a rectangular sheet-shaped body. 7 .

7 . The pre-tensioning device for stitching thread of a sewing machine according to claim 1 , wherein the abutting member has a first side part, a top part and a second side part that are connected, and one side of the top part is connected to one side. 8 . The first side part and the other side of the top part are connected to the second side part, and the first side part and the second side part are connected to the top part with an included angle, so that the abutment The top piece is ㄇ-shaped when viewed from the side, and the two abutting portions abut against the top.

8 . The pre-tensioning device for the stitching thread of the sewing machine according to claim 1 , wherein the top cover has limit portions on both sides of the cover portion, and the limit portions have two limit positions. 9 . A threading hole is formed between the two limiting bodies, and the two threading holes communicate with the threading space.

9 . The pre-tensioning device for stitching thread of a sewing machine according to claim 8 , wherein two sides of the covering part respectively have one end surface, and the limiting part is formed on the side end surface to define the The wire seat, the pre-force supplying member, the abutting member and the top cover are stacked along the height direction, and the two limiting bodies respectively extend along the height direction.

10 . The pre-tensioning device for stitching thread of a sewing machine according to claim 3 , wherein the wire seat, the pre-tensioning part, the abutting part and the top cover are defined to be stacked and arranged along the height direction, the said 10 . The height direction is perpendicular to the transverse direction and the longitudinal direction, the top cover is fixed, and the abutting member can be displaced along the height direction to control the width of the threading space.

11. The pre-tensioning device for sewing thread of a sewing machine according to claim 1, characterized in that, the pre-tension supply member can be of three types, one of which is a folded V-shaped elastic sheet, The reversing portion is located at the position where the elastic sheet is folded, the two extending portions are two sides of the elastic sheet extending in different directions, and the two abutting portions are the two end edges of the elastic sheet respectively; the pre-force The second type of the supply part is a torsion spring. The torsion spring is generally V-shaped. The abutting portions are respectively connected to the inflection points of the ends of the two support arms; the second type of the pre-force supply member is formed by a curved iron wire, and the curved iron wire is generally V-shaped.

12 . The pre-tensioning device for weaving stitches of a sewing machine according to claim 1 , wherein the thread holder is integrally formed with the sewing machine. 13 .

13. A weaving suture prestressing device for a sewing machine, characterized in that, comprising:

The pre-force supplying piece is made of elastic material, the pre-force supplying piece is arranged in the accommodating groove, the pre-force supplying piece has a reversing part, and the two sides of the reversing part are respectively connected to the extension parts, The other ends of the two extension parts connected to the reversing part respectively have abutting parts, and the two abutting parts are arranged at the bottom of the groove;

an abutting member, disposed on the pre-force supplying member, and the reversing portion abuts against the abutting member; and

a top cover, arranged on the abutting member, the top cover is combined with the wire seat, so that a threading space is formed between the top cover and the abutting member, and the threading space is used for threading the suture Pass.

14. A weaving suture pre-tensioning device for a sewing machine, characterized in that it comprises:

The pre-force supply part is made of elastic material, the pre-force supply part is arranged in the accommodating groove, and the pre-force supply part has a first pushing part, a turning part and a second pushing part which are connected in sequence There is an included angle between the first pushing portion and the turning portion, an included angle between the second pushing portion and the turning portion, and the first pushing portion is disposed in the groove end;

an abutting member, disposed on the pre-force supplying member, and the second pushing portion abuts against the abutting member; and