CN213571032U - Sewing machine and anti-jumping-thread device thereof - Google Patents

Abstract

The utility model relates to a sewing machine prevents jumper wire device and sewing machine, sewing machine prevents jumper wire device includes needle swinging frame, needle bar, drive connecting rod passes through the drive yoke and is connected with the needle bar in order to drive the needle bar reciprocates, the drive yoke includes tooth fork, mounting, is provided with the chute on the tooth fork, the mounting part is installed in the chute and can be in the chute reciprocating sliding, the sliding direction of mounting in the chute with the moving direction of needle swinging frame is the same or parallel, the chute slope sets up for when the needle bar was swung on the left side and was swung on the right side, the needle bar can produce the difference in height in order to compensate the time difference of rotating shuttle when left side colluded the line and collude the line on the right side. The utility model provides a sewing machine prevents wire jumper device and sewing machine can avoid carrying on phenomenons such as wire jumper, the off-line that orbit sewing in-process appears such as zigzag to the material of making up is level and smooth, and the stitch seam is pleasing to the eye.

Description

Sewing machine and anti-jumping-thread device thereof

Technical Field

The utility model relates to a sewing machine technical field especially relates to a sewing machine prevents wire jumper device to and sewing machine including the device.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. And derives the artistic forms of hand-push embroidery, computer embroidery, etc.

Sewing machines generally include a machine body, a drive, and accessories. Wherein the machine body is an essential part of the sewing machine. The sewing machine consists of four mechanisms of material needling, thread hooking, thread picking and feeding, auxiliary mechanisms of winding, material pressing, tooth falling and the like, and the motion of the mechanisms is reasonably matched and works circularly to sew up sewing materials. When the sewing machine is in operation, the needle moves up and down under the traction of the needle rod, when the tip of the needle penetrates through the fabric, the needle pulls out a small loop from one side to the other side, the rotating shuttle below the fabric can grasp the loop, then wraps the loop around another loop of another thread or the same thread, and then the needle penetrates back to the original side, so that the needle drives the threads to enter and exit the fabric to sew the threads together.

For some specific sewed articles such as underwear and the like, the sewing stitches of the sewing machine need to be zigzag, and at this time, the needle bar of the sewing machine needs to swing left and right while moving up and down. The existing transmission mode of the needle rod is that a driving connecting rod directly drives the needle rod to move up and down through a needle rod fixing rod. The left and right swinging needles directly drive the needle rod to swing left and right through the needle swinging frame by the needle swinging connecting rod. The structure enables the phenomena of thread jumping, thread falling and the like to occur in the process of zigzag equal-track sewing of the existing sewing machine, and the phenomena of unevenness, unattractive stitch and the like exist in the sewn material.

Disclosure of Invention

The utility model aims at providing a sewing machine prevents wire jumper device can avoid carrying on phenomenons such as wire jumper, the off-line that orbit sewing process appears such as zigzag to the material of making up is level and smooth, and the stitch seam is pleasing to the eye.

In order to achieve the above object, the present invention provides.

An anti-jumping device of a sewing machine comprises a needle swinging frame capable of reciprocating left and right, a needle bar which is arranged on the needle swinging frame and can move up and down, a driving connecting rod for driving the needle bar to move up and down, the driving connecting rod is connected with the needle rod through a driving frame to drive the needle rod to move up and down, the driving frame comprises a tooth fork fixedly arranged on the driving connecting rod and a fixing piece fixedly connected with the needle rod, the tooth fork is provided with a chute, the fixing piece is partially installed in the chute and can slide in the chute in a reciprocating way, the sliding direction of the fixing piece in the inclined groove is the same as or parallel to the moving direction of the needle swinging frame, the inclined groove is obliquely arranged, so that when the needle rod swings left and right, the needle rod can generate a height difference in height to compensate the time difference of the rotating shuttle when the rotating shuttle hooks the left thread and the right thread.

Preferably, the mounting includes fixed block and fixed mounting the slider of fixed block both sides, the fixed block with needle bar fixed connection, the tooth fork include one end with drive connecting rod fixed connection's tooth fork and fix the first tooth fork body and the second tooth fork body of tooth fork other end, first tooth fork body with the second tooth fork body all has the chute, and there is the interval between the first tooth fork body and the second tooth fork body, the slider of fixed block both sides is installed respectively in the chute of first tooth fork body and second tooth fork body and can be wherein the horizontal slip, the needle bar passes interval between the first tooth fork body and the second tooth fork body.

Preferably, the inclined grooves on the first prong body and the second prong body are both in a U shape with an opening towards one side.

Preferably, the lower end of the driving connecting rod is provided with a mounting hole, and one end of the tooth fork rod penetrates through the mounting hole and then is fixedly connected with the check ring.

Preferably, the end surfaces of the first tooth fork body and the second tooth fork body are attached to one side of the driving connecting rod, and the check ring is attached to the other side of the driving connecting rod.

Preferably, the retainer ring and the tooth fork rod are both provided with pin holes, and the retainer ring and the tooth fork rod are positioned through pins.

Preferably, the driving connecting rod is further provided with a guide groove arranged up and down, and the connecting rod guide plate is installed in the guide groove in a vertically sliding manner.

Preferably, the needle swinging frame is provided with an upper hole and a lower hole, the upper hole and the lower hole are through holes, and the needle rod can slide up and down in the upper hole and the lower hole.

Preferably, the needle swinging frame is driven by the needle swinging connecting rod to reciprocate left and right, and the needle swinging frame is connected with the needle swinging connecting rod through an eccentric shaft.

The utility model discloses different with prior art lies in, the utility model provides a sewing machine prevents jumping wire device drives the needle bar by the drive connecting rod through a set of teeth fork and mounting and makes the up-and-down motion. The left and right swing needles are driven by the swing needle frame to swing left and right, when the needle rod swings left and right, the needle rod is fixedly arranged on the fixing piece, and the fixing piece generates needle rod height difference to compensate the time difference of the rotating shuttle on the left hook thread and the right hook thread when swinging the needle left and right through the chute of the frame tooth fork, so that the defect that the left hook thread and the right hook thread of the rotating shuttle are not at the same position of the machine needle is overcome, and the phenomena of wire jumping and wire falling cannot occur in the sewing process. Meanwhile, the left and right thread hooking time is synchronous, so that the sewed material is smoother and the stitches are more beautiful. Therefore the utility model provides a sewing machine prevents that jumper device can avoid carrying on phenomenons such as the wire jumper that orbit sewing in-process appears such as zigzag, the off-line to the material of making up is level and smooth, and the stitch seam is pleasing to the eye.

Another object of the utility model is to provide a sewing machine can avoid carrying on phenomenons such as the wire jumper that orbit sewing process appears such as zigzag, take off the line to the material of making up is level and smooth, and the stitch seam is pleasing to the eye.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows:

a sewing machine comprises a machine body and the anti-jumping thread device of the sewing machine, wherein the anti-jumping thread device is installed on the machine body.

The sewing machine and the anti-jumping thread device of the sewing machine have the same technical advantages compared with the prior art, and are not described again.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the disclosure are illustrated by way of example and not by way of limitation, and like or corresponding reference numerals indicate like or corresponding parts and in which:

FIG. 1 is a schematic structural view of an anti-jump thread device of a sewing machine according to the present invention;

FIG. 2 is an exploded view of the anti-jump thread device of the sewing machine shown in FIG. 1;

FIG. 3 is a schematic view of the construction of the tooth fork;

FIG. 4 is a schematic view of an assembly structure of a fixed block and a slider;

FIG. 5 is a schematic view of the drive link;

FIG. 6 is a schematic view of the anti-skip device of the sewing machine when the rotating shuttle is at the left swing hook position;

FIG. 7 is a schematic view of the structure of the thread jumping preventing device of the sewing machine when the rotating shuttle is at the right swing hook position.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present disclosure are used to distinguish between different objects and are not used to describe a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

In the present disclosure, directional terms are defined, and in the case where no description is made to the contrary, directional terms such as "upper, lower, left, and right" are used to indicate that the sewing machine is defined in a normal use, and correspond to the up, down, left, and right directions shown in fig. 1. The term "inner and outer" refers to the inner and outer contours of the respective component parts. These directional terms are used for ease of understanding and are not intended to limit the scope of protection.

In the present disclosure, when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The fixed mode and the connection mode can be fixed and connected in a detachable mode or fixed and connected in a non-detachable mode.

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

The inventor finds that the left and right thread hooking of the rotating shuttle is not at the same position of the machine needle due to the fact that a certain time is needed for the machine needle arranged on the needle rod to move from the left side to the right side, so that the phenomena of thread jumping, thread falling and the like can occur in the sewing process, and the sewn material is uneven and the stitches are not attractive. Based on this, the present invention provides the following embodiments.

Referring to fig. 1 and 2 as appropriate, the present invention provides an anti-skip thread device for a sewing machine according to a basic embodiment, including a needle swing frame 2 capable of reciprocating left and right, a needle bar 3 mounted on the needle swing frame 2 and capable of moving up and down, and a driving link 4 for driving the needle bar 3 to move up and down.

The needle swing frame 2 can move back and forth left and right in various existing manners, for example, the needle swing frame 2 can move back and forth left and right by a stepping motor, or the needle swing frame 2 can move back and forth left and right by a crank-link mechanism.

The driving connecting rod 4 is connected with the needle bar 3 through a driving frame to drive the needle bar 3 to move up and down. The driving connecting rod 4 can also realize up-and-down reciprocating movement through a stepping motor or a crank connecting rod mechanism. Referring to fig. 1 and 2, the driving rack comprises a tooth fork 1 fixedly mounted on the driving connecting rod 4, and a fixing piece 5 fixedly connected with the needle rod, wherein the tooth fork 1 is provided with a chute 14, and the fixing piece is partially mounted in the chute 14 and can slide in the chute 14 in a reciprocating manner. The plane in which the inclined groove 14 contacts the fixed member is an upper and lower plane so that the driving link 4 can drive the needle bar 3 to reciprocate up and down through the driving rack.

The sliding direction of the fixing piece 5 in the inclined groove 14 is the same as or parallel to the moving direction of the needle swing frame 2. The inclined groove 14 is obliquely arranged, as shown in fig. 6 and 7, so that when the needle bar 3 swings left and right, the needle bar 3 can generate a height difference in height to compensate the time difference of the rotating shuttle 9 when the left and right hook lines. The angle at which the inclined groove 14 is obliquely arranged is determined according to parameters such as the moving speed of the needle bar, the rotating speed of the rotary hook 9, and the like. For example, when the needle bar 3 is raised by 2.5 mm after the left and right swings are lowered to the lowest point, the height of the needle bar 3 is changed by the inclined groove 14 so that the rotary hook 9 is exactly at the same position as the groove of the needle 8.

The anti-jumping thread device of the sewing machine provided by the basic embodiment compensates the time difference of the left thread hooking and the right thread hooking of the rotating shuttle by the height difference of the needle rod generated when the needle swings left and right on the chute of the gripper fork by the fixing piece, solves the defect that the left thread hooking and the right thread hooking of the rotating shuttle are not at the same position of the machine needle, and avoids the phenomena of jumping and thread falling in the sewing process. Meanwhile, the left and right thread hooking time is synchronous, so that the sewed material is smoother and the stitches are more beautiful.

In the preferred embodiment of the present invention, as shown in fig. 2 and 4, the fixing member 5 includes a fixing block 51 and a slider 52 fixedly installed on both sides of the fixing block 51, and the fixing block 51 is fixedly connected to the needle bar 3. The two sliding blocks 52 are fixed on the fixing block 51 through two fixing pins 53, a through hole is formed in the middle of the fixing block 51, and the needle bar 3 penetrates through the through hole in the fixing block 51 and is fixed by a fixing screw 54. As shown in fig. 2 and 3, the dental fork 1 includes a fork rod 11 fixedly connected to the driving link 4 at one end and a first fork body 12 and a second fork body 13 fixed to the other end of the fork rod, the first fork body 12 and the second fork body 13 each have the inclined groove 14, and there is a space between the first fork body 12 and the second fork body 13, and preferably, the first fork body 12 and the second fork body 13 are identical in shape and structure and are arranged in parallel front and back. In order to ensure stability, reinforcing ribs are further provided on the outer sides of the first prong body 12 and the second prong body 13. Referring to fig. 1, the sliding blocks 52 on both sides of the fixing block 51 are respectively installed in the inclined grooves 14 of the first and second prongs 12 and 13, the upper and lower surfaces of the sliding blocks 52 are in sliding contact with the upper and lower groove surfaces of the inclined grooves 14 and can slide left and right in the inclined grooves 14, and the needle bar 3 passes through the space between the first and second prongs 12 and 13.

For the convenience of assembly, it is further preferable that, as shown in fig. 3, the inclined grooves 14 of the first and second prongs 12 and 13 are U-shaped and open to one side, that is, the inclined grooves 14 of the first and second prongs 12 and 13 are U-shaped and open to the left.

As shown in fig. 5, 1 and 2, preferably, a mounting hole 41 is formed at a lower end of the driving link 4, and one end of the tooth fork 11 passes through the mounting hole 41 and is fixedly connected to a retaining ring 42. In the present embodiment, the fork 1 is fixed by the mounting hole 41 and the retaining ring 42, so that the fork 1 can be easily detached.

In addition to the above embodiment, it is further preferable that, as shown in fig. 1, end surfaces of the first and second yokes 12 and 13 are respectively attached to one side of the drive link 4, and the retainer ring 42 is attached to the other side of the drive link 4. Thereby avoiding the displacement of the tooth fork 1 in the reciprocating motion process and ensuring the positioning precision.

The retainer ring 42 and the tooth fork rod 11 can be fixed in various suitable manners, preferably, as shown in fig. 2, pin holes are formed in the retainer ring 42 and the tooth fork rod 11, the retainer ring and the tooth fork rod are positioned by pins, and the pins are installed in the pin holes of the retainer ring 42 and the tooth fork rod 11.

In order to ensure the position accuracy when the driving link 4 moves up and down, it is preferable that the driving link 4 is further provided with a guide groove 43 which is vertically provided and in which the link guide 7 is slidably installed vertically, as shown in fig. 5. The link guide 7 is a guide plate fixed to the sewing machine body, and when the driving link 4 moves up and down, the guide groove 43 of the driving link 4 slides on the link guide 7, so that the position accuracy of the driving link 4 when moving up and down can be ensured, and the abrasion of the needle bar can be avoided.

In the present invention, the needle bar can be slidably mounted on the needle swing frame 2 in various suitable manners, preferably, as shown in fig. 2, an upper hole 21 and a lower hole 22 are provided on the needle swing frame 2, the upper hole 21 and the lower hole 22 are through holes, the upper hole 21 and the lower hole 22 are coaxially disposed, and the needle bar 3 can slide up and down in the upper hole 21 and the lower hole 22. When assembling the needle bar 3, the needle bar 3 is first inserted through the upper hole 21 of the needle swing frame 2, then inserted through the lower hole 22 of the needle swing frame 2 through the hole of the fixing block 51, and then the needle bar 3 is fixed by the fixing screw 54.

In the present invention, as shown in fig. 1 and 2, the needle swing frame 2 is driven by the needle swing connecting rod 6 to reciprocate left and right, and the needle swing frame 2 is connected to the needle swing connecting rod 6 through the eccentric shaft 61. Wherein the needle swinging connecting rod 6 can be driven by other transmission mechanisms or power mechanisms. The needle swing frame 2 is provided with a mounting hole, the needle swing connecting rod 6 is also provided with a mounting hole, and the eccentric shaft 61 is arranged in the mounting holes of the needle swing frame 2 and the needle swing connecting rod 6. The eccentric shaft 61 is rotated by a tool such as a screwdriver, the relative position of the needle swinging frame 2 and the needle swinging connecting rod 6 can be finely adjusted, so that the assembly and the debugging of the anti-jumping thread device of the sewing machine are facilitated.

Based on above-mentioned jumping-line device is prevented to sewing machine, the utility model also discloses a sewing machine, include the organism and install jumping-line device is prevented to sewing machine on the organism. As shown in fig. 1 and 2, the anti-skip thread device of the sewing machine comprises a needle swing frame 2, a needle swing connecting rod 6, a needle bar 3, a driving connecting rod 4, a fixed block 51, a slide block 52 and a tooth fork 1. The needle swing frame 2 is connected with a needle swing connecting rod 6 through an eccentric shaft 61, and the needle swing connecting rod 6 is in transmission connection with a sewing machine power device so as to drive the needle swing frame 2 to reciprocate left and right. As shown in fig. 2, the swing needle frame 2 is provided with an upper hole 21 and a lower hole 22, both the upper hole 21 and the lower hole 22 are through holes, the upper hole 21 and the lower hole 22 are coaxially arranged, and the needle bar 3 can slide up and down in the upper hole 21 and the lower hole 22. As shown in fig. 6 and 7, the needle 8 is fixedly mounted on the lower end of the needle bar 3, and the rotary hook 9 is fixedly mounted on the machine body. The number of the sliding blocks 52 is two, the two sliding blocks 52 are fixed on the fixing block 51 through two fixing pins 53, a through hole is formed in the middle of the fixing block 51, and the needle rod 3 penetrates through the through hole in the fixing block 51 and is fixed through a fixing screw 54. The tooth fork 1 comprises a tooth fork rod 11 with one end fixedly connected with the driving connecting rod 4 and a first tooth fork body 12 and a second tooth fork body 13 which are fixed at the other end of the tooth fork rod, wherein the first tooth fork body 12 and the second tooth fork body 13 are both provided with a chute 14, and the chutes 14 are obliquely arranged, so that the needle rod 3 can generate a height difference in height to compensate the time difference of the rotating shuttle 9 in left thread hooking and right thread hooking when the needle rod 3 swings left and right. When the needle bar 3 descends to the lowest point by the left swing and the right swing and then ascends by 2.5 mm, the height of the needle bar 3 is changed by the inclined groove 14, so that the rotating shuttle 9 is just at the same position of the groove of the needle 8. The first prong body 12 and the second prong body 13 are spaced apart from each other. Two sliding blocks 52 are respectively installed in the inclined grooves 14 of the first fork body 12 and the second fork body 13, the upper and lower surfaces of the sliding blocks 52 are in sliding contact with the upper and lower groove surfaces of the inclined grooves 14 and can slide left and right in the inclined grooves 14, and the needle bar 3 passes through the space between the first fork body 12 and the second fork body 13. The driving connecting rod 4 is also provided with a guide groove 43 which is arranged up and down, a connecting rod guide plate 7 is arranged on the sewing machine body, and the connecting rod guide plate 7 is arranged in the guide groove 43 and can slide up and down in the guide groove.

The utility model discloses following beneficial effect has:

1. because the transmission mode of the utility model is that the driving connecting rod 4 drives the needle bar 3 to move up and down through the tooth fork 1 and the slide block 52. The left and right swinging needles drive the needle bar 3 to swing left and right through the needle swinging frame 2 by the needle swinging connecting rod 6, when the needle bar 3 swings left and right, because the needle bar 3 is connected on the sliding block 52, the sliding block 52 generates the height difference of the needle bar 3 to compensate the time difference of the rotating shuttle 9 on the left hook thread and the right hook thread when swinging the needles left and right through the chute 14 of the tooth fork 1, thereby realizing the defect that the left and right hook threads of the rotating shuttle 9 are not at the same position of the needle, and avoiding the phenomena of wire jumping and wire off in the sewing process.

2. Because the utility model discloses control the time synchronization of colluding the line, the material that makes the sewing is more level and smooth, the stitch seam is more pleasing to the eye, has avoided traditional structure about collude the line time difference problem lead to about make the stitch seam elasticity different, make up material unevenness, stitch seam phenomenons such as not pleasing to the eye.

The sequence of the above embodiments is only for convenience of description, and does not represent the merits of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. An anti-jump thread device of a sewing machine, comprising: the needle swinging frame capable of moving left and right in a reciprocating mode, a needle rod arranged on the needle swinging frame and capable of moving up and down, and a driving connecting rod used for driving the needle rod to move up and down are characterized in that the driving connecting rod is connected with the needle rod through the driving frame to drive the needle rod to move up and down, the driving frame comprises a tooth fork fixedly arranged on the driving connecting rod and a fixing piece fixedly connected with the needle rod, a chute is arranged on the tooth fork, the fixing piece is partially arranged in the chute and capable of sliding in the chute in a reciprocating mode, the sliding direction of the fixing piece in the chute is the same as or parallel to the moving direction of the needle swinging frame, and the chute is obliquely arranged, so that when the needle rod swings left and right, the needle rod can generate height difference to compensate time difference of a rotating shuttle during left thread hooking and right thread hooking.

2. The anti-skip thread device of sewing machine according to claim 1, wherein the fixing member includes a fixing block and sliders fixedly installed at both sides of the fixing block, the fixing block is fixedly connected to the needle bar, the yoke includes a yoke rod having one end fixedly connected to the driving link and first and second yoke bodies fixed at the other end of the yoke rod, the first and second yoke bodies each have the inclined groove, and a space exists between the first and second yoke bodies, the sliders at both sides of the fixing block are respectively installed in the inclined grooves of the first and second yoke bodies and can slide left and right therein, and the needle bar passes through the space between the first and second yoke bodies.

3. The anti-skip thread device of sewing machine according to claim 2, wherein the inclined grooves of the first fork body and the second fork body are each in a U shape opened to one side.

4. The anti-jump thread device of sewing machine according to claim 2, wherein the lower end of the driving link is provided with a mounting hole, and one end of the tooth fork rod passes through the mounting hole and is fixedly connected with the retainer ring.

5. The anti-skip thread device of sewing machine according to claim 4, wherein the end surfaces of the first and second tooth fork bodies are attached to one side of the driving link, and the retainer ring is attached to the other side of the driving link.

6. The anti-jump thread device of sewing machine according to claim 5, wherein the retainer ring and the tooth fork rod are provided with pin holes, and the retainer ring and the tooth fork rod are positioned by pins.

7. The anti-skip thread device of sewing machine according to claim 2, wherein the driving link is further provided with a guide groove disposed up and down, and a link guide is slidably installed in the guide groove up and down.

8. The anti-skip thread device of sewing machine according to claim 1, wherein the needle swing frame is provided with an upper hole and a lower hole, both of which are through holes, and the needle bar can slide up and down in the upper hole and the lower hole.

9. The anti-skip thread device of sewing machine according to claim 1, wherein the needle swing frame is driven to reciprocate left and right by a needle swing link, and the needle swing frame is connected to the needle swing link by an eccentric shaft.

10. A sewing machine comprising a machine body and the anti-skip thread device of the sewing machine according to any one of claims 1 to 9 mounted on the machine body.

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