Sewing machine

Abstract

The utility model relates to a sewing machine, which comprises a sewing machine main body assembly, a sewing machine main body structure and a sewing machine main body assembly, the sewing thread routing assembly comprises a thread trapper structure, a counter structure and a thread drawing device structure, and the thread trapper structure, the counter structure and the thread drawing device structure are all arranged on the sewing machine main body structure. According to the technical scheme, the problems that in the prior art, thread ends of the thread trimming and bird nest preventing technology of a sewing machine are different in length, and the control precision of the thread ends is not enough are effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of sewing machines, and more particularly, to a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so as to interweave or sew together one or more layers of sewing materials. The sewing machine can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, as well as products such as leather, plastic, and paper. The stitches sewn are neat, beautiful, flat and firm, the sewing speed is fast, and it is easy to use.

[0003] The "bird's nest" phenomenon refers to the situation where when the sewing machine starts sewing, the top thread remains on the presser foot surface and a thread ball appears at the beginning of the bottom thread after starting sewing, which seriously affects the product appearance and sewing quality. In order to avoid the "bird's nest" phenomenon, the thread end was previously cut manually, which is time-consuming and laborious, and there is also the situation of missed cutting. There are also some existing technologies that adopt automated anti-"bird's nest" technologies, but the above anti-"bird's nest" technologies make the lengths of the thread ends different, and the control accuracy of the thread end lengths is insufficient. Utility Model Content

[0004] This application provides a sewing machine to solve the problems in the prior art that the lengths of the thread ends in the thread cutting and anti-"bird's nest" technologies of the sewing machine are different and the control accuracy of the thread end lengths is insufficient.

[0005] According to a sewing machine provided by this application, it includes: a sewing machine main body assembly, and the sewing machine main body assembly includes a sewing machine main body structure; a sewing thread routing assembly, and the sewing thread routing assembly includes a thread clamping structure, a counter structure, and a thread extracting structure, and the thread clamping structure, the counter structure, and the thread extracting structure are all arranged on the sewing machine main body structure.

[0006] Further, the sewing machine further includes a control component, the control component is electrically connected to the counter structure, the counter structure includes a counting rotating shaft, a counting roller, and a position collector, the position collector is arranged opposite to the counting roller, the sewing thread cooperates with the counting roller, the counting rotating shaft is installed on the sewing machine main body structure, the counting roller is rotatably installed on the counting rotating shaft, or the counting roller is installed on the counting rotating shaft, and the counting rotating shaft is rotatably installed on the sewing machine main body structure.

[0007] Further, the thread extracting structure includes a thread extracting driving part and a first thread extracting part, the thread extracting driving part is fixed on the sewing machine main body structure, and the first thread extracting part is connected to the output end of the thread extracting driving part to drive the first thread extracting part to move.

[0008] Further, the thread pulling driving part includes a thread pulling driving motor, a gear, a rack and a limiting seat. The thread pulling driving motor and the limiting seat are installed on the main body structure of the sewing machine. The gear is installed at the output end of the thread pulling driving motor. The rack is installed in the limiting seat so as to be movable along the axial direction of the sewing needle. The first thread pulling part is installed on the rack, and the sewing thread engaging part of the first thread pulling part is located outside the main body of the sewing machine.

[0009] Further, the limiting seat is a limiting cylinder. A gear hole and a first thread pulling long hole are provided on the side wall of the limiting cylinder. The rack is movably installed in the limiting cylinder. The gear is meshed with the rack through the gear hole. The first thread pulling part is a first thread pulling arm. The first end of the first thread pulling arm is installed on the rack, and the second end of the first thread pulling arm is located outside the main body structure of the sewing machine. One or more sewing thread perforations are provided at the second end of the first thread pulling arm.

[0010] Further, the thread pulling device structure further includes a second thread pulling part. The second thread pulling part is installed on the rack, and the second thread pulling part and the first thread pulling part have a predetermined distance along the axis of the rack.

[0011] Further, the sewing thread routing assembly further includes a multi-functional tensioner structure. The multi-functional tensioner structure is provided on the main body structure of the sewing machine.

[0012] Further, the sewing machine further includes a thread cutting assembly. The thread cutting assembly is provided inside the main body structure of the sewing machine.

[0013] Further, the sewing thread routing assembly further includes a thread guiding ring structure and a thread take-up lever structure. Both the thread guiding ring structure and the thread take-up lever structure are provided on the main body structure of the sewing machine.

[0014] Further, among the counter structure, the thread pulling device structure, the thread guiding ring structure and the thread take-up lever structure of the sewing thread routing assembly, the middle structure of every three structures has a predetermined distance from the connecting lines of the adjacent two structures.

[0015] Applying the technical solution of the present application, the sewing thread sequentially passes through the thread clamping device structure, the counter structure and the thread pulling device structure, and then enters the sewing needle. When the thread pulling device structure pulls the sewing thread, the thread clamping device structure clamps the sewing thread. In this way, the thread pulling device structure can only pull out the sewing thread on one side of the sewing needle, shortening the thread end and realizing anti-bird's nest. The accurate measurement of the length of the sewing thread can be realized through the counter structure, so that the counter structure and the thread pulling device structure cooperate to accurately pull out the length of the sewing thread. The technical solution of the present application effectively solves the problems of uneven lengths of the thread ends in the thread cutting and anti-bird's nest technologies of the existing sewing machines and insufficient control accuracy of the lengths of the thread ends. Description of the Drawings

[0016] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Shows a three-dimensional structural schematic diagram of a sewing machine according to Embodiment 1 of the present application;

[0019] Figure 2 Shows Figure 1 A partial enlarged schematic diagram of the sewing machine;

[0020] Figure 3 Shows Figure 1 A structural schematic diagram of the thread cutting assembly of the sewing machine;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the thread pulling structure of the sewing machine.

[0022] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0023] 10. Sewing machine main body assembly; 11. Sewing machine main body structure; 12. Thread rack structure; 20. Sewing thread routing assembly; 21. Thread clamping structure; 22. Counter structure; 23. Thread pulling device structure; 231. Thread pulling driving part; 2311. Thread pulling driving motor; 2312. Gear; 2313. Rack; 2314. Limit seat; 232. First thread pulling part; 24. Multi-functional tensioner structure; 25. Guide wire ring structure; 26. Thread take-up lever structure; 27. Tensioner structure; 30. Control assembly; 40. Thread cutting assembly; 100. Sewing thread; 200. Sewing needle. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings and combine with the embodiments to detail the present application.

[0025] It should be pointed out that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0026] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned or rotated in other different ways by 90 degrees or in other orientations, and corresponding interpretations are made for the spatial relative descriptions used here.

[0027] As Figures 1 to 4 shown, the sewing machine of the first embodiment includes: a sewing machine main body assembly 10 and a sewing thread routing assembly 20. The sewing machine main body assembly 10 includes a sewing machine main body structure 11. The sewing thread routing assembly 20 includes a thread clamping structure 21, a counter structure 22 and a thread pulling structure 23, and the thread clamping structure 21, the counter structure 22 and the thread pulling structure 23 are all arranged on the sewing machine main body structure 11.

[0028] Applying the technical solution of the first embodiment, the sewing thread 100 sequentially passes through the thread clamping structure 21, the counter structure 22 and the thread pulling structure 23, and then enters the sewing needle 200. When the thread pulling structure 23 pulls the sewing thread 100, the thread clamping structure 21 clamps the sewing thread 100, so that the thread pulling structure 23 can only pull out the sewing thread 100 on one side of the sewing needle 200, shortening the thread end and realizing anti-bird's nest. The accurate measurement of the length of the sewing thread 100 can be realized through the counter structure 22, so that the counter structure 22 and the thread pulling structure 23 cooperate to accurately pull out the sewing thread 100. The technical solution of this embodiment effectively solves the problems in the prior art that the lengths of the cut threads and the anti-bird's nest technology of the sewing machine are different and the control accuracy of the thread end length is insufficient.

[0029] It should be noted that sewing machines include sewing machines, stitching machines, embroidery machines, quilting machines, etc.

[0030] As Figure 1As shown, in the technical solution of the first embodiment, the sewing machine further includes a control component 30. The control component 30 is electrically connected to the counter structure 22. The counter structure 22 includes a counting rotating shaft, a counting roller, and a position collector. The position collector is disposed opposite to the counting roller. The sewing thread cooperates with the counting roller. The counting rotating shaft is installed on the main body structure 11 of the sewing machine, and the counting roller is rotatably installed on the counting rotating shaft. The frictional force between the sewing thread 100 and the counting roller drives the counting roller to rotate, and the measurement is performed according to the rotation angle of the roller. The above structure is convenient to operate and compactly arranged. The position collector includes a signal transmitter and a signal receiver. The signal transmitter is disposed on the counting rotating shaft (the counting rotating shaft does not move), and the signal receiver is disposed on the counting roller. When the counting roller rotates, the number of rotations and the rotation angle of the counting roller can be measured. This technology has been successfully applied to motors and will not be elaborated here. The control component 30 includes a control panel, a controller, and a memory, and calculations are performed according to the following method to input a program. The position collector can detect the number of rotations and the rotation angle of the roller. The perimeter of one rotation of the roller, that is, the length L of the sewing thread when the roller rotates one week, is input into the control component 30. Multiplying L by the number of rotations and then adding L multiplied by the angle of the roller divided by 360 can obtain the length of the sewing thread.

[0031] As Figure 1 , Figure 2 and Figure 4 shown, in the technical solution of the first embodiment, the thread pulling device structure 23 includes a thread pulling driving part 231 and a first thread pulling part 232. The thread pulling driving part 231 is fixed on the main body structure 11 of the sewing machine, and the first thread pulling part 232 is connected to the output end of the thread pulling driving part 231 to drive the first thread pulling part 232 to move. The above structure is compact and convenient to operate. It should be noted that the thread pulling device structure 23 is electrically connected to the control component 30, greatly improving the automation degree and the accuracy of thread pulling.

[0032] As Figure 2 and Figure 4As shown, in the technical solution of the first embodiment, the thread drawing driving part 231 includes a thread drawing driving motor 2311, a gear 2312, a rack 2313 and a limit seat 2314. The thread drawing driving motor 2311 and the limit seat 2314 are installed on the main body structure 11 of the sewing machine. The gear 2312 is installed at the output end of the thread drawing driving motor 2311. The rack 2313 is installed in the limit seat 2314 so as to be movable along the axial direction of the sewing needle. The first thread drawing part 232 is installed on the rack 2313, and the sewing thread matching part of the first thread drawing part 232 is located outside the main body of the sewing machine. The setting of the limit seat 2314 makes the movement of the rack 2313 smoother. The cooperation between the gear 2312 and the rack 2313 can not only meet the thread drawing speed of the thread drawing device structure 23, but also meet the thread drawing accuracy. The axial direction of the rack 2313 is the same as the axial direction of the sewing needle. The first thread drawing part 232 and the rack 2313 are of an integral structure, or can be detachably connected by fasteners such as screws, or can be welded. The thread drawing driving motor 2311, the gear 2312 and the limit seat 2314 are all installed inside the sewing machine housing, and the rack 2313 is also installed inside the sewing machine housing. As the rack 2313 moves, a part of it can be located outside the sewing machine housing.

[0033] It should be noted that the thread drawing driving part 231 may also include a thread drawing motor threaded rod and a threaded sleeve, and thread transmission is also possible, or an electric push rod structure, a pneumatic structure or a hydraulic structure is all possible.

[0034] As Figure 4 shown, in the technical solution of the first embodiment, the limit seat 2314 is a limit cylinder. The side wall of the limit cylinder is provided with a gear hole and a first thread drawing long hole. The rack 2313 is movably installed in the limit cylinder. The gear 2312 is meshed with the rack 2313 through the gear hole. The first thread drawing part 232 is a first thread drawing arm. The first end of the first thread drawing arm is installed on the rack 2313, and the second end of the first thread drawing arm is located outside the main body structure 11 of the sewing machine. The second end of the first thread drawing arm has one or more sewing thread through holes. A slideway adapted to the rack 2313 is arranged in the limit cylinder, so that the movement of the rack 2313 in the limit cylinder is relatively smooth. And the structure of the limit cylinder can well protect the rack and prevent dust from polluting the rack.

[0035] As Figure 1As shown, in the technical solution of the first embodiment, the sewing thread routing assembly 20 further includes a multi-functional tensioner structure 24, and the multi-functional tensioner structure 24 is arranged on the sewing machine main body structure 11. The setting of the multi-functional tensioner structure 24 on the one hand meets the requirements for sewing during work, and on the other hand, when it is necessary to cut the sewing thread 100, the multi-functional tensioner structure can reduce the clamping force on the sewing thread 100, so that the passage of the sewing thread 100 is smoother. It should be noted that the multi-functional tensioner structure 24 is arranged on the outer wall of the sewing machine housing of the sewing machine main body structure 11. The multi-functional tensioner structure 24 includes a mounting seat, a first clamping plate, a second clamping plate, a spring and a pressing seat. The mounting seat is mounted on the sewing machine main body structure 11. The first clamping plate and the second clamping plate are passed through the mounting seat. The sewing thread 100 is located between the first clamping plate and the second clamping plate. The spring passes through the mounting seat and presses between the second clamping plate and the pressing seat. When it is necessary to cut the sewing thread 100, the first clamping plate is electrified to generate a magnetic field, and the magnetic field pushes the second clamping plate to compress the spring, so that the friction force of the multi-functional tensioner structure 24 on the sewing thread 100 is greatly reduced. The multi-functional tensioner structure 24 is electrically connected to the control assembly 30. The above structure utilizes the principle of like poles repelling and opposite poles attracting of the magnetic field, achieving the beneficial effects of fast reaction speed and good controllability.

[0036] As Figure 3 shown, in the technical solution of the first embodiment, the sewing machine further includes a thread cutting assembly 40, and the thread cutting assembly 40 is arranged inside the sewing machine main body structure 11. The thread cutting assembly 40 is electrically connected to the control assembly 30, that is, the technical solution of the present application has a series of linkage control methods, which greatly improves the automation degree of the sewing machine and better controls the precision of the length of the thread end.

[0037] It should be noted that, for example, when the thread cutting assembly 40 cuts the upper thread (the sewing thread in the above text) and the bobbin thread, it will drive the upper thread to be drawn out a certain length from the thread spool. This length is measured by the counter structure 22 and fed back to the control assembly 30. The control assembly 30 issues an instruction to the thread drawing structure 23, so that the thread drawing structure 23 takes this length into account when drawing the thread, and thus the precision of the thread drawing structure 23 for drawing the thread is greatly improved.

[0038] As Figure 1 and Figure 2As shown, in the technical solution of Embodiment 1, the sewing thread routing assembly 20 further includes a wire loop structure 25 and a thread take-up lever structure 26, both of which are arranged on the sewing machine main body structure 11. By jointly adjusting factors such as the routing and tension of the sewing thread 100 through the wire loop structure 25 and the thread take-up lever structure 26, problems such as flying threads can be effectively avoided. There are multiple wire loop structures 25. The sewing thread 100 is led out from the thread stand structure 12, reaches the first wire loop structure 25, then enters the thread clamping structure 21, then enters the counter structure 22, then enters the tensioner structure 27, then enters the second wire loop structure 25, then enters the multi-functional tensioner structure 24, then enters the first thread extraction part 232, then enters the thread take-up lever structure 26 through the third wire loop structure 25, then enters the fourth wire loop structure 25, and finally enters the sewing needle 200. It should be noted that the above wire loop structures 25 can be set more or reduced according to needs, and the above is only an example.

[0039] As Figure 1 and Figure 2 shown, in the technical solution of Embodiment 1, among the counter structure 22, the thread extractor structure 23, the wire loop structure 25 and the thread take-up lever structure 26 of the sewing thread routing assembly 20, the middle structure of every three structures has a predetermined distance from the connecting lines of the adjacent two structures. In this way, each structure will form a certain interference on the sewing thread 100. For example, for the counter structure 22, the tensioner structure 27 and the second wire loop structure 25, in terms of the routing of the sewing thread 100, the tensioner structure 27 is located between the counter structure 22 and the second wire loop structure 25, that is, the tensioner structure 27 is not on the connecting line between the counter structure 22 and the second wire loop structure 25, and the tensioner structure 27 has a predetermined distance from the counter structure 22 and the second wire loop structure 25.

[0040] The difference between the technical solution of Embodiment 2 and the technical solution of Embodiment 1 is that the counting roller is installed on the counting rotating shaft, and the counting rotating shaft is rotatably installed on the sewing machine main body structure 11. The specific structure can be adjusted according to actual needs, thus expanding the application environment of the counter structure 22.

[0041] The technical solution of Embodiment 3 is different from that of Embodiment 1 in that the wire drawing device structure 23 further includes a second wire drawing part, which is installed on the rack 2313, and the second wire drawing part and the first wire drawing part 232 have a predetermined distance along the axis of the rack 2313. Due to the limitation of the volume of the sewing machine and the diversity of the sewn objects, sometimes a longer wire drawing length is required. Adding the second wire drawing part can increase the drawn length of the sewing thread 100. Or the second wire drawing part can replace the fourth wire guiding ring structure 25, which can avoid flying wires. It should be noted that the second wire drawing part is a second wire drawing arm. The first end of the second wire drawing arm is installed on the rack 2313, the second end of the second wire drawing arm is located outside the main body structure 11 of the sewing machine, and the second end of the second wire drawing arm has one or more sewing thread threading holes. In use, only the first wire drawing part 232 can be used, or both the first wire drawing part 232 and the second wire drawing part can be used simultaneously, which is determined according to specific factors such as the wire drawing length.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0044] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A sewing machine, characterized in that: include: A sewing machine main body assembly (10), the sewing machine main body assembly (10) comprising a sewing machine main body structure (11); A sewing thread routing assembly (20), the sewing thread routing assembly (20) comprising a thread clamp structure (21), a counter structure (22) and a thread extractor structure (23), the thread clamp structure (21), the counter structure (22) and the thread extractor structure (23) are all arranged on the sewing machine main body structure (11).

2. The sewing machine according to claim 1, characterized in that: The sewing machine further comprises a control assembly (30), wherein the control assembly (30) is electrically connected to the counter structure (22), wherein the counter structure (22) comprises a counting rotating shaft, a counting roller and a position collector, wherein the position collector is arranged opposite to the counting roller, and the sewing thread cooperates with the counting roller. The counting rotating shaft is mounted on the main structure (11) of the sewing machine, and the counting roller is rotatably mounted on the counting rotating shaft; or the counting roller is mounted on the counting rotating shaft, and the counting rotating shaft is rotatably mounted on the main structure (11) of the sewing machine.

3. The sewing machine according to claim 2, characterized in that: The thread extractor structure (23) comprises a thread extracting driving unit (231) and a first thread extracting unit (232); the thread extracting driving unit (231) is fixed on the sewing machine main body structure (11); the first thread extracting unit (232) is connected to the output end of the thread extracting driving unit (231) to drive the first thread extracting unit (232) to move.

4. The sewing machine according to claim 3, characterized in that: The thread drawing drive unit (231) comprises a thread drawing drive motor (2311), a gear (2312), a rack (2313) and a limit seat (2314); the thread drawing drive motor (2311) and the limit seat (2314) are mounted on the main structure (11) of the sewing machine; the gear (2312) is mounted on the output end of the thread drawing drive motor (2311); the rack (2313) is mounted in the limit seat (2314) movably along the axial direction of the machine needle; the first thread drawing unit (232) is mounted on the rack (2313); and the sewing thread matching part of the first thread drawing unit (232) is located outside the main body of the sewing machine.

5. The sewing machine according to claim 4, characterized in that: The limiting seat (2314) is a limiting cylinder, and the side wall of the limiting cylinder is provided with a gear hole and a first long thread drawing hole. The rack (2313) is movably installed in the limiting cylinder, and the gear (2312) is meshed with the rack (2313) through the gear hole. The first thread drawing part (232) is a first thread drawing arm, and the first end of the first thread drawing arm is installed on the rack (2313), and the second end of the first thread drawing arm is located outside the sewing machine main structure (11), and the second end of the first thread drawing arm has one or more sewing thread through holes.

6. The sewing machine according to claim 4, characterized in that: The wire drawing device structure (23) further includes a second wire drawing portion, which is mounted on the rack (2313), and the second wire drawing portion and the first wire drawing portion (232) have a predetermined distance along the axis of the rack (2313).

7. The sewing machine according to any one of claims 2 to 6, characterized in that: The sewing thread routing assembly (20) further comprises a multifunctional tensioner structure (24), and the multifunctional tensioner structure (24) is arranged on the sewing machine main body structure (11).

8. The sewing machine according to claim 7, characterized in that The sewing machine further comprises a thread trimming assembly (40), wherein the thread trimming assembly (40) is arranged in the main structure (11) of the sewing machine.

9. The sewing machine according to claim 7, characterized in that: The sewing thread routing assembly (20) further comprises a wire loop structure (25) and a thread take-up lever structure (26), wherein the wire loop structure (25) and the thread take-up lever structure (26) are both arranged on the sewing machine main body structure (11).

10. The sewing machine according to claim 9, characterized in that Among the counter structure (22), the thread drawer structure (23), the wire loop structure (25) and the thread take-up lever structure (26) of the sewing thread routing assembly (20), the middle structure among every three structures has a predetermined distance from the connecting line of two adjacent structures.

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