CN220846570U - Thread pulling device for backstitch - Google Patents
Thread pulling device for backstitch Download PDFInfo
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- CN220846570U CN220846570U CN202322389019.7U CN202322389019U CN220846570U CN 220846570 U CN220846570 U CN 220846570U CN 202322389019 U CN202322389019 U CN 202322389019U CN 220846570 U CN220846570 U CN 220846570U
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- pulling device
- ball
- thread pulling
- backstitch
- cam
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- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 24
- 238000009958 sewing Methods 0.000 abstract description 13
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
The application relates to the field of sewing machines, in particular to a thread pulling device for backstitch, which comprises a lower shaft, wherein the surface of the lower shaft is provided with a cam and a curve wheel, the surface of the cam is abutted with a sliding plate, the surface of the sliding plate is provided with a limit groove, the surface of the curve wheel is abutted with a connecting component, the top of the connecting component is abutted with a thread pulling device, the thread pulling device penetrates through the limit groove, the lower shaft can rotate the cam and the curve wheel in the rotating process, a groove limits a ball in the rotating process of the curve wheel, meanwhile, the limitation of the groove shape can enable the ball to drive the ball shaft to rotate through the connecting shaft, the thread pulling device can move left and right due to the fact that the ball shaft penetrates through a limit perforation, and limit is carried out through the limit groove in the left and right moving process, so that stability in the displacement process of the thread pulling device is ensured, meanwhile, the cam can drive the thread pulling device to carry out lifting motion in the rotating process, and normal regular thread tracks can not be damaged in the instant backstitch process, and normal sewing can be achieved.
Description
Technical Field
The application relates to the technical field of sewing machines, in particular to a thread pulling device for backstitch.
Background
The single thread backstitch is a sewing machine which uses a thread to perform sewing in a reverse direction suddenly in a normal sewing process, and the sewn stitch is still unchanged and continuously sewn. The prior art adopts a curved needle to hook the thread to directly connect the upper thread, thereby forming uninterrupted stitch connection and achieving the effect of continuous sewing.
In the backstitch process, the single-thread sewing walks very regular stitch under normal conditions, and the backstitch can destroy the normal regular stitch immediately so as to directly prevent sewing, and the damage probability is increased while the work efficiency is influenced.
Disclosure of utility model
The application provides a thread pulling device for backstitch, which aims to solve the technical problems that in the backstitch process, a single thread is sewn to form very regular stitch, and the backstitch immediately breaks the normal regular stitch so that the sewing cannot be directly performed, the working efficiency is influenced, and meanwhile, the damage probability is increased.
The application provides a thread pulling device for backstitch, which comprises a lower shaft, wherein a cam and a curve wheel are arranged on the surface of the lower shaft, the surface of the cam is abutted against a sliding plate, a limit groove is formed in the surface of the sliding plate, a connecting component is abutted against the surface of the curve wheel, a thread pulling device is abutted against the top of the connecting component, and the thread pulling device penetrates through the limit groove.
In any of the above technical solutions, further, the connecting assembly includes a ball and a connecting shaft, the curved wheel has a groove, the ball is disposed in the groove, one end of the connecting shaft is disposed at the top of the ball, the other end of the connecting shaft is connected with the ball shaft, a limit perforation is formed in the wire shifter, and the other end of the ball shaft passes through the limit perforation.
In any of the above technical solutions, further, one end of the lower shaft is connected with a curved needle, and the other end of the lower shaft is connected with a power source.
In any of the above technical solutions, further, the surface of the lower shaft is detachably connected with the curved needle fastening sleeve, the curved needle is connected with the curved needle fastening sleeve, and the curved needle fastening sleeve is disposed on the left side of the cam.
In any of the above technical schemes, the device further comprises a guide plate, wherein a through hole is formed in the guide plate, a limit rod is arranged at the bottom of the slide plate, and the bottom of the limit rod penetrates through the through hole.
In any of the above technical solutions, further comprising a ball swing arm, wherein a top of the ball swing arm is abutted against a bottom of the wire shifter.
In any of the above embodiments, further, the curved wheel is detachably connected to a surface of the lower shaft.
In any of the above technical solutions, further, the guide plate and the ball swing arm are provided with mounting holes inside.
In any of the above embodiments, further, the depth of the groove is matched with the thickness of the ball.
In any of the above technical solutions, further, the curved wheel is detachably connected with the surface of the lower shaft through a screw, a rivet or a bolt, and the curved needle fastening sleeve is detachably connected with the surface of the lower shaft through a screw, a rivet or a bolt.
The beneficial effects of the application are mainly as follows:
The lower shaft can enable the cam and the curve wheel to rotate in the rotating process, the groove limits the ball in the rotating process, meanwhile, the limitation of the groove shape enables the ball to drive the ball shaft to rotate through the connecting shaft, the ball shaft penetrates through the limiting perforation, so that the thread pulling device moves left and right, and the thread pulling device is limited through the limiting groove in the left and right moving process, so that stability of the thread pulling device in the displacement process is guaranteed, the cam can drive the thread pulling device to lift in the rotating process, normal regular stitch can not be damaged under the condition of backstitch immediately, and normal sewing can be achieved.
It is to be understood that both the foregoing general description and the following detailed description are for purposes of example and explanation and are not necessarily limiting of the application. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the application. Meanwhile, the description and the drawings are used to explain the principles of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a wire pulling device according to an embodiment of the present application;
FIG. 2 is a schematic view of a skateboard according to an embodiment of the application;
FIG. 3 is a schematic view of a guide plate according to an embodiment of the present application;
Fig. 4 is a schematic diagram of a wire pulling device according to an embodiment of the application.
Icon:
100-lower shaft; 101-a curved needle fastening sleeve; 102-bending the needle; 200-cam; 201-a skateboard; 202-a limit groove; 203-a guide plate; 204-a through hole; 205-a limit rod; 300-curve wheel; 301-grooves; 302-balls; 303—a connecting shaft; 304-a ball shaft; 305-ball swing arm; 400-wire pulling device; 401-limit perforation; 500-mounting holes.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, 2, 3 and 4, in one or more embodiments, a thread pulling device for backstitch is provided, which includes a lower shaft 100, a cam 200 and a curve wheel 300 are disposed on the surface of the lower shaft 100, a sliding plate 201 is abutted on the surface of the cam 200, a limit groove 202 is disposed on the surface of the sliding plate 201, a connection component is abutted on the surface of the curve wheel 300, a thread pulling device 400 is abutted on the top of the connection component, the thread pulling device 400 passes through the limit groove 202, the connection component includes a ball 302 and a connection shaft 303, the curve wheel 300 has a groove 301, the ball 302 is disposed in the groove 301, one end of the connection shaft 303 is disposed at the top of the ball 302, the other end of the connection shaft 303 is connected with a ball shaft 304, a limit perforation 401 is disposed in the interior of the thread pulling device 400, the other end of the ball shaft 304 passes through the limit perforation 401, and the depth of the groove 301 is matched with the thickness of the ball 302.
In this embodiment, the lower shaft 100 rotates the cam 200 and the cam 300 in the rotation process, the cam 300 limits the balls 302 in the rotation process by the groove 301, meanwhile, the ball 302 drives the ball shaft 304 to rotate by the limitation of the shape of the groove 301 through the connecting shaft 303, and the thread shifter 400 moves left and right due to the fact that the ball shaft 304 passes through the limiting perforation 401, and is limited by the limiting groove 202 in the left and right movement process, so as to ensure the stability of the thread shifter 400 in the displacement process, and meanwhile, the cam 200 drives the thread shifter 400 to move up and down in the rotation process, so that normal regular stitch can not be damaged under the condition of backstitch immediately, and normal sewing can be performed.
Referring to fig. 1, 2, 3 and 4, in some embodiments, one end of the lower shaft 100 is connected with a looper 102, the other end of the lower shaft 100 is connected with a power source, the surface of the lower shaft 100 is detachably connected with a looper fastening sleeve 101, the looper 102 is connected with the looper fastening sleeve 101, the looper fastening sleeve 101 is disposed at the left side of the cam 200, the sliding plate 203 is further provided with a through hole 204, the bottom of the sliding plate 201 is provided with a limit rod 205, the bottom of the limit rod 205 passes through the through hole 204, the sliding plate further comprises a ball swing arm 305, the top of the ball swing arm 305 is abutted against the bottom of the wire shifter 400, the curve wheel 300 is detachably connected to the surface of the lower shaft 100, the guide plate 203 and the inner part of the ball swing arm 305 are respectively provided with a mounting hole 500, the curve wheel 300 is detachably connected with the surface of the lower shaft 100 through screws, rivets or bolts, the looper fastening sleeve 101 is detachably connected with the surface of the lower shaft 100 through screws, rivets or bolts.
In this embodiment, the looper fastening sleeve 101 prevents the looper 102 from being misplaced and causing the inability to sew, the guide plate 203 and the ball swing arm 305 both fix the device at a proper position through the mounting holes, wherein the mounting can be in the form of screws, rivets or bolts, the application preferably adopts the screw structure, wherein the power source can be a motor or a power pump, wherein the arrangement of the looper 102 prevents the outflow misplacement of the related structure, wherein it is to be noted that the detachable connection of the curve wheel 300 does not cause the jamming condition of the balls 302.
Specifically, the working principle of the thread pulling device for backstitch provided by the application is as follows:
The lower shaft 100 can rotate the cam 200 and the curve wheel 300 in the rotating process, the curve wheel 300 limits the balls 302 in the rotating process, meanwhile, the limitation of the shape of the groove 301 can lead the balls 302 to drive the ball shaft 304 to rotate through the connecting shaft 303, the ball shaft 304 passes through the limiting perforation 401, so that the thread shifter 400 moves left and right, and is limited through the limiting groove 202 in the left and right moving process, so that the stability of the thread shifter 400 in the displacement process is ensured, meanwhile, the cam 200 can drive the thread shifter 400 to perform lifting motion in the rotating process, and further, normal regular stitch can not be damaged under the condition of backstitch immediately, and normal sewing can be performed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. The utility model provides a line device is dialled for backstitch, its characterized in that includes the lower axle, the surface of lower axle is provided with cam and curved wheel, the surface butt of cam has the slide, the spacing groove has been seted up on the surface of slide, the surface butt of curved wheel has coupling assembling, coupling assembling's top butt has the line ware of dialling, the line ware of dialling passes the spacing groove.
2. The thread pulling device for backstitch according to claim 1, wherein said connecting assembly comprises a ball and a connecting shaft, said cam has a groove, said ball is disposed in said groove, one end of said connecting shaft is disposed at the top of said ball, the other end of said connecting shaft is connected with a ball shaft, a limit perforation is provided in the interior of said thread pulling device, and the other end of said ball shaft passes through said limit perforation.
3. The thread pulling device for backstitch according to claim 1, wherein one end of said lower shaft is provided with a curved needle, and the other end of said lower shaft is connected with a power source.
4. A thread pulling device for backstitch according to claim 3, wherein a looper fastening sleeve is detachably connected to the surface of said lower shaft, said looper is connected to said looper fastening sleeve, and said looper fastening sleeve is disposed on the left side of said cam.
5. The thread pulling device for backstitch according to claim 1, further comprising a guide plate, wherein a through hole is formed in the guide plate, a limit rod is arranged at the bottom of the guide plate, and the bottom of the limit rod penetrates through the through hole.
6. The thread pulling device for backstitch according to claim 5, further comprising a ball swing arm, wherein a top of said ball swing arm abuts a bottom of said thread pulling device.
7. The thread pulling device for backstitch according to claim 1, wherein said cam is detachably connected to a surface of said lower shaft.
8. The thread pulling device for backstitch according to claim 6, wherein said guide plate and said ball swing arm are each provided with a mounting hole inside.
9. A backstitch thread pulling device according to claim 2, wherein the depth of said groove matches the thickness of said ball.
10. A thread pulling device for backstitch according to claim 3, wherein said cam is detachably connected to the surface of said lower shaft by means of screws, rivets or bolts, and said looper fastening sleeve is detachably connected to the surface of said lower shaft by means of screws, rivets or bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322389019.7U CN220846570U (en) | 2023-09-04 | 2023-09-04 | Thread pulling device for backstitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322389019.7U CN220846570U (en) | 2023-09-04 | 2023-09-04 | Thread pulling device for backstitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220846570U true CN220846570U (en) | 2024-04-26 |
Family
ID=90739791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322389019.7U Active CN220846570U (en) | 2023-09-04 | 2023-09-04 | Thread pulling device for backstitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220846570U (en) |
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2023
- 2023-09-04 CN CN202322389019.7U patent/CN220846570U/en active Active
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