CN110846823A

CN110846823A - Shuttle sleeve

Info

Publication number: CN110846823A
Application number: CN201911035422.1A
Authority: CN
Inventors: 林泽贤
Original assignee: Individual
Current assignee: Zhongshan Yinuote Intelligent Technology Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-02-28

Abstract

The invention relates to the technical field of sewing machines, and discloses a bobbin case.A thread adjusting mechanism is arranged between a thread passing groove and a thread outlet groove, the tension of the thread going out from the thread outlet groove is ensured to be consistent after the tension of the thread is further adjusted by the thread adjusting mechanism, so that the stability and the consistency of stitches are ensured.

Description

Shuttle sleeve

Technical Field

The invention relates to the technical field of sewing machines, in particular to a shuttle sleeve.

Background

In a conventional sewing machine, when sewing, a bobbin around which a bobbin thread is wound is directly installed in a rotating hook, and then a bobbin case (i.e., a cover of the rotating hook) is installed on the rotating hook.

The sewing thread needs to keep certain tension in the sewing process so as to ensure the tidiness and consistency of the sewing stitch, the tension of the thread is different when the bobbin is in a full thread state and a low thread state, in addition, in the sewing process, the thread on the bobbin comes out from the top of the bobbin case and reaches a thread outlet through the thread groove, the thread also can cause the tension of the thread at the thread outlet to be different due to the contact with the bobbin case in the conveying process, the existing bobbin case is provided with the spring piece on the side wall of the existing bobbin case, the tension of the thread is adjusted on the side wall of the bobbin case through the veneering and pressing of the free end of the spring piece, the spring piece has elasticity, the thread pressing effect of the spring piece can be influenced by the tension of the thread in the sewing process, the thread pressing effect of the spring piece is unstable, and the.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the existing bobbin case is unstable when the pressure of the thread is adjusted through the spring piece, so that the difference of sewing stitches is large, and the attractiveness is influenced.

In order to solve the technical problem, the invention provides a shuttle sleeve, which comprises a shuttle sleeve body, a line pressing plate and a line adjusting mechanism, wherein a line cavity for containing a line ball is arranged in the shuttle sleeve body, the shuttle sleeve body is respectively provided with a line hole, a line passing groove and a line outgoing groove, the line hole is communicated with the line cavity, the line outgoing groove is arranged at the side part of the shuttle sleeve body and is used for connecting the line hole with the line outgoing groove, the line pressing plate is arranged on the shuttle sleeve body and covers the line passing groove, and the line adjusting mechanism is arranged between the line passing groove and the line outgoing groove and is used for adjusting the tightness degree of a line at the front end of the line outgoing groove;

the wire adjusting mechanism comprises a wire adjusting groove and a wire pressing shaft, the front end of the wire pressing shaft extends into the wire adjusting groove and is used for enabling a wire in the wire adjusting groove to abut against the groove wall of the wire adjusting groove, and an adjusting piece used for adjusting abutting force of the front end of the wire pressing shaft is arranged at the rear end of the wire pressing shaft.

Further preferably, the shuttle sleeve body is provided with a mounting hole for mounting the thread pressing shaft, the mounting hole extends to the outer wall of the shuttle sleeve body to be communicated with the thread adjusting groove, the adjusting piece comprises an adjusting screw and an elastic piece, the elastic piece is connected between the thread pressing shaft and the adjusting screw, and the adjusting screw drives the front end of the thread pressing shaft to gradually abut against the inner wall of the thread adjusting groove by adjusting the screwing depth of the adjusting screw into the mounting hole.

Further preferably, the adjusting screw and the thread pressing shaft are both horizontally arranged on the shuttle sleeve body and are coaxially arranged.

Further preferably, a plurality of wire guiding columns are arranged in the wire passing groove.

Further preferably, the wire guiding columns are arranged at the lower end of the wire pressing plate at intervals, and assembling holes corresponding to the wire guiding columns are formed in the wire passing groove.

Further preferably, the shuttle sleeve body comprises a rotating sleeve, and a bottom plate and an upper cover plate which are detachably connected with the bottom and the top of the rotating sleeve respectively, the rotating sleeve, the bottom plate and the upper cover plate define the thread cavity together, the thread hole is formed in the middle of the upper cover plate, the thread passing groove and the thread adjusting mechanism are formed in the upper cover plate, and the thread outlet groove is formed in the side portion of the upper cover plate.

Further preferably, the upper cover plate is provided with a positioning structure and a locking structure which are connected and fastened with the rotating sleeve.

Preferably, the positioning structure comprises an elastic column, a positioning hole arranged on the rotary sleeve and a positioning groove arranged on the upper cover plate, wherein one end of the elastic column is arranged in the positioning groove, and the other end of the elastic column is movably buckled and hung in the positioning hole.

Further preferably, a handle is arranged on the elastic column, a limiting block is arranged on the upper cover plate, and an avoiding groove corresponding to the limiting block is formed in the handle.

Further preferably, the locking structure comprises a plurality of hooks arranged at the upper end of the rotating sleeve and clamping grooves arranged on the upper cover plate and matched with the hooks, and the hooks are arranged at intervals along the circumferential direction of the rotating sleeve.

Further preferably, the bottom edge of the rotating sleeve extends inwards to form a connecting part, and the lower end outer edge of the bottom plate is connected to the connecting part.

Further preferably, the upper end surface of the bottom plate and/or the lower end surface of the upper cover plate are provided with a wire structure for preventing the wires from being loosely knotted.

Further preferably, the wire structure is a plurality of annular protrusions arranged at intervals and gradually diffused from the center of the bottom plate to the outer edge of the bottom plate and/or a plurality of annular protrusions arranged at intervals and gradually diffused from the center of the upper cover plate to the outer edge of the upper cover plate.

Further preferably, the middle part of the bottom plate is provided with a through hole column for the threading of the thread shaft.

Further preferably, the through-hole column is arranged in a circular truncated cone shape.

Further preferably, the side wall of the rotating sleeve is provided with a positioning block which is matched with the rotating shuttle of the sewing machine for installation.

Compared with the prior art, the shuttle sleeve provided by the embodiment of the invention has the beneficial effects that:

in the bobbin case of the embodiment of the invention, the thread group is accommodated in the thread cavity of the bobbin case body, the thread coming out of the thread cavity passes through the thread outlet groove along the thread hole and the thread passing groove and then is combined with the upper thread ring to be sewn to form a stitch, the thread pressing plate is arranged above the thread passing groove, the thread attaching surface is pressed in the thread passing groove through the thread pressing plate to prevent the thread from running upwards in the sewing process, in addition, the thread pressing plate can provide certain pressure for the thread in the thread passing groove so as to ensure the tension of the thread, further, the thread adjusting mechanism is arranged between the thread passing groove and the thread outlet groove, the tension of the thread coming out of the thread outlet groove is ensured to be consistent after further adjusting the tension of the thread through the thread adjusting mechanism, thereby ensuring the stability and the consistency of the stitch, particularly, the thread adjusting mechanism comprises the thread adjusting groove and the thread pressing shaft, the thread comes out of the thread passing through the thread passing groove and passes through the front end of the thread pressing shaft and, the adjusting piece of adjusting the rear end of the line pressing shaft is used for adjusting the wall of the line adjusting groove abutted to the front end of the line pressing shaft so as to adjust the pressing force of the front end of the line pressing shaft on the line adjusting groove.

Drawings

FIG. 1 is a schematic structural view of a shuttle sleeve according to an embodiment of the present invention;

FIG. 2 is a schematic structural view from another perspective of a shuttle sleeve according to an embodiment of the present invention;

FIG. 3 is an exploded view of the shuttle sleeve of the embodiment of the present invention;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 1;

FIG. 5 is a schematic structural diagram of an upper cover plate according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a tension disc according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a state of the sleeve bonding according to an embodiment of the present invention.

In the figure, 10, the shuttle sleeve body; 20. a wire adjusting mechanism; 30. a wire pressing plate; 40. coiling a bobbin; 50. A coil; 101. a rotating sleeve; 102. a base plate; 103. an upper cover plate; 104. a wire lumen; 105. a wire hole; 106. a wire passing groove; 107. an outlet groove; 108. mounting holes; 109. an assembly hole; 110. an elastic column; 111. positioning holes; 112. positioning a groove; 113. a handle; 114. a limiting block; 115. an avoidance groove; 116. a hook is clamped; 117. a card slot; 118. a connecting portion; 119. an annular projection; 120. a through-hole column; 121. positioning blocks; 201. a line adjusting groove; 202. a wire pressing shaft; 203. adjusting screws; 204. An elastic member; 301. a wire guide post.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 6, a shuttle sleeve according to a preferred embodiment of the present invention includes a shuttle sleeve body 10, a thread pressing plate 30 and a thread adjusting mechanism 20, wherein a thread cavity 104 for accommodating a thread ball is provided in the shuttle sleeve body 10, the shuttle sleeve body 10 is respectively provided with a thread hole 105, a thread passing groove 106 and a thread outgoing groove 107, the thread hole 105 is communicated with the thread cavity 104, the thread outgoing groove 107 is provided at a side portion of the shuttle sleeve body 10, the thread passing groove 106 is used for connecting the thread hole 105 with the thread outgoing groove 107, the thread pressing plate 30 is provided on the shuttle sleeve body 10 and covers over the thread passing groove 106, and the thread adjusting mechanism 20 is provided between the thread passing groove 106 and the thread outgoing groove 107 and is used for adjusting tightness of a thread at a front end of the thread outgoing groove; the wire adjusting mechanism 20 comprises a wire adjusting groove 201 and a wire pressing shaft 202, wherein the front end of the wire pressing shaft 202 extends into the wire adjusting groove 201 and is used for enabling a wire in the wire adjusting groove 201 to abut against the groove wall of the wire adjusting groove 201, and the rear end of the wire pressing shaft 202 is provided with an adjusting piece used for adjusting abutting force of the front end of the wire pressing shaft 202.

Based on the bobbin case, the thread ball 50 is accommodated in the thread cavity 104 of the bobbin case body 10, the thread in the thread cavity 104 comes out from the thread hole 105 and passes through the thread-passing groove 106 along the thread-passing groove 107 to be combined with the upper thread ring of the sewing machine to form a stitch on the sewing material, the thread-pressing plate 30 is arranged above the thread-passing groove 106, the thread-pressing plate 30 presses the thread-pressing surface in the thread-passing groove 106 to prevent the thread from running off upwards in the sewing process, moreover, the thread-pressing plate 30 can provide certain pressure for the thread in the thread-passing groove 106, so as to ensure the tension of the thread, further, the thread-adjusting mechanism 20 is arranged between the thread-passing groove 106 and the thread-exiting groove 107, according to the actual sewing situation, the tension of the thread is further adjusted by the thread-adjusting mechanism 20, so as to ensure the consistent tension of the thread coming out from the thread-exiting groove 107, and thus ensuring the stability and consistency of the stitch, specifically, the thread-adjusting mechanism 20 comprises a thread-adjusting groove and a thread-pressing shaft 202, and the thread-adjusting groove 201, and the The tension of the front end of the wire pressing shaft 202 abutted to the wall of the wire adjusting groove 201 is adjusted by adjusting the adjusting piece at the rear end of the wire pressing shaft 202, so that the pressure of the front end of the wire pressing shaft 202 on the wire is adjusted, and the wire is adjusted together through the inner walls of the wire pressing shaft 202 and the wire adjusting groove 201, so that the adjusting process is stable, and the consistency of the tension of the wire going out from the wire outlet groove 107 can be ensured.

Compared with the conventional routing mode that the thread of the bobbin case needs to be wound on the cover plate and then wound into the thread groove 106 from the upper part of the cover plate, the thread outlet distance of the bobbin case of the embodiment is reduced, so that the friction time between the thread and the bobbin case can be reduced, and the condition of burrs on the thread is reduced.

Further, the bobbin case body 10 is provided with a mounting hole 108 for mounting the thread pressing shaft 202, the mounting hole 108 extends to the outer wall of the bobbin case body 10 to be communicated with the thread adjusting groove 201, the adjusting member comprises an adjusting screw 203 and an elastic member 204, the elastic member 204 is preferably a spring, the elastic member 204 is connected between the thread pressing shaft 202 and the adjusting screw 203, the adjusting screw 203 drives the front end of the thread pressing shaft 202 to gradually abut against the inner wall of the thread adjusting groove 201 by adjusting the depth of the adjusting screw 203 screwed into the mounting hole 108, when the tension of the sewing thread is insufficient, the adjusting screw 203 is screwed into the mounting hole 108 by a screwdriver or other adjusting tools, the elastic member 204 is compressed, the thread pressing shaft 202 extends into the thread adjusting groove 201 under the action of elastic force to increase the pressure between the front end of the thread pressing shaft 202 and the inner wall of the thread adjusting groove 201, so as to increase the resistance of the thread passing between the two and increase the tension of the thread, similarly, when the tension of, the adjusting screw 203 is screwed out, the elasticity of the elastic element 204 is reduced, the pressure between the front end of the wire pressing shaft 202 and the inner wall of the wire adjusting groove 201 is reduced, the resistance of the wire between the front end of the wire pressing shaft and the inner wall of the wire adjusting groove is reduced, the tension of the wire is reduced, the resistance of the wire is ensured to be adjustable, and the wire adjusting device is wide in adaptability. Preferably, the adjusting screw 203 and the thread pressing shaft 202 are both horizontally arranged on the shuttle sleeve body 10 and coaxially arranged, so that the thread adjusting structure is arranged at the upper end of the shuttle sleeve body 10, the space at the upper end of the shuttle sleeve body 10 is fully utilized, and the integrity of the whole shuttle sleeve structure can be improved.

In this embodiment, be equipped with a plurality of wire columns 301 in crossing the wire casing 106, the line is followed wire casing 106 respectively after going out from the chamber 104 and is around establishing on wire column 301, under wire column 301's guide effect, can avoid the line to tie a knot in crossing wire casing 106, guarantees the smooth and easy nature of line transportation process, and then guarantees the stability and the regularity of seam material upper stitch. Further, the wire guiding columns 301 are arranged at the lower end of the thread tension plate 30 at intervals, the wire passing groove 106 is provided with assembling holes 109 corresponding to the wire guiding columns 301, and therefore the wire guiding columns 301 can guide the thread to the corresponding line and can be mounted in the corresponding assembling holes 109 through the guiding columns to achieve connection between the thread tension plate 30 and the shuttle sleeve body 10.

In this embodiment, the bobbin case body 10 includes a rotary sleeve 101, and a bottom plate 102 and an upper cover plate 103 detachably connected to the bottom and the top of the rotary sleeve 101, respectively, the rotary sleeve 101, the bottom plate 102 and the upper cover plate 103 together define a thread-out chamber 104, a thread hole 105 is disposed in the middle of the upper cover plate 103, a thread-passing groove 106 and a thread-adjusting mechanism 20 are disposed on the upper cover plate 103, and a thread-out groove 107 is disposed on the side of the upper cover plate 103, based on which, the thread chamber 104 of the bobbin case in this embodiment can be used to completely contain a thread ball 50 without installing the thread ball 50 through the thread core, thereby greatly increasing the thread-containing amount of the thread chamber 104, reducing the number of thread-changing times during sewing, improving the sewing efficiency while ensuring the sewing quality, and in particular operation, as shown in fig. 7, the bottom plate 102 and the upper cover plate 103 are fixed to the thread-sewing mechanism, the rotary sleeve 101 can be used after the thread is fully filled, and, the wire volume of the wire cavity 104 is greatly increased. Furthermore, the middle of the bottom plate 102 is provided with a through hole column 120 for the threading shaft 40 to pass through, the threading mechanism comprises the threading shaft 40, when threading, the threading shaft 40 of the threading mechanism is fixed with the upper cover plate 103 after passing through the bottom plate 102, the threading mechanism drives the threading shaft 40 to rotate to wind the wire on the threading shaft 40 between the bottom plate 102 and the upper cover plate 103, then the threading shaft 40 is withdrawn from the bobbin case after the rotating sleeve 101 and the bottom plate 102 are installed, thus, a wireless core in the wire cavity 104 of the bobbin case can be realized, the wire amount of the wire cavity 104 is greatly increased, the sewing efficiency is improved, the through hole column 120 is arranged on the bottom plate 102, on one hand, the threading shaft 40 of the threading mechanism is convenient, on the other hand, the winding of the wire is convenient, the embodiment directly threads the wire in the wire cavity 104 of the bobbin case, compared with the existing bobbin case without a mandrel, the threading can be performed on the wire of various materials (the existing bobbin case without a bobbin case directly places the globes 50 in the wire cavity 104, however, when sewing is performed using a slippery thread such as a nylon thread, the nylon thread is not easily agglomerated due to its smoothness, and the thread in the thread cavity 104 is easily scattered and knotted), and thus the adaptability is strong. Preferably, the through hole pillar 120 is disposed in a circular truncated cone shape, so as to reduce the volume of the wire cavity 104 occupied by the through hole pillar 120 and increase the wire capacity of the wire cavity 104, and meanwhile, in the initial wire bonding state, the through hole pillar 120 disposed in a circular truncated cone shape enables the wire to be better attached to the through hole pillar 120, thereby ensuring the wire bonding quality.

In this embodiment, the upper cover plate 103 is provided with a positioning structure and a locking structure which are connected and fastened with the rotating sleeve 101, so that the upper cover plate 103 is well positioned when being connected with the rotating sleeve 101 through the positioning structure, and the upper cover plate 103 is fixed in position when being detached and connected with the rotating sleeve 101 every time, so as to be better matched with the rotating shuttle.

Specifically, the positioning structure comprises an elastic column 110, a positioning hole 111 arranged on the rotary sleeve 101 and a positioning groove arranged on the upper cover plate 103, one end of the elastic column 110 is arranged in the positioning groove 112, the other end is movably buckled and hung in the positioning hole 111, when the elastic column 110 is installed, the elastic column 110 passes through the positioning hole 111 on the rotary sleeve 101 for positioning, when the elastic column 110 is disassembled, because the elastic column 110 has elasticity, the elastic column 110 is compressed towards the positioning groove 112, and the elastic column is disassembled after being separated from the positioning hole 111 of the rotary sleeve 101, the structure is simple, the operation is convenient, the quick assembly and disassembly can be realized, the sewing efficiency is further improved, the elastic column 110 is adjusted for facilitating the operation, a handle 113 is arranged on the elastic column 110, a limiting block 114 is arranged on the upper cover plate 103, an avoiding groove 115 corresponding to the limiting block 114 is arranged on the handle 113, the elastic column 110 is prevented from falling off from the positioning groove 112, the handle 113 is used for adjusting the assembly or the separation of the elastic column 110 and the positioning hole 111, so that the upper cover plate 103 and the rotary sleeve 101 are disassembled and assembled, generally, the handle 113 is attached to the upper cover plate 103, when adjustment is needed, the handle 113 is pulled up, and the elastic column 110 is driven to rotate in the positioning groove 112 to match the best operation angle, so that labor is saved during adjustment.

Furthermore, the locking structure comprises a plurality of hooks 116 arranged at the upper end of the rotary sleeve 101 and clamping grooves 117 arranged on the upper cover plate 103 and matched with the hooks 116, the hooks 116 are arranged at intervals along the circumferential direction of the rotary sleeve 101, after the upper cover plate 103 and the rotary sleeve 101 are positioned, the hooks 116 on the rotary sleeve 101 are hooked in the corresponding clamping grooves 117 to fix the upper cover plate 103 and the rotary sleeve 101, and the hooks 116 and the clamping grooves 117 are connected, so that the upper cover plate 103 and the rotary sleeve 101 can be detachably connected, and during installation and disassembly, the lower rotary sleeve 101 only needs to be slightly rotated, so that the hooks 116 and the clamping grooves 117 are mutually buckled or separated.

In this embodiment, the bottom edge of the rotary sleeve 101 extends inwards to form the connecting portion 118, the outer edge of the lower end of the bottom plate 102 is lapped on the connecting portion 118, after the wire is fully marked by the wire marking mechanism, the rotary sleeve 101 is directly sleeved on the bottom plate 102 and the upper cover plate 103 to be positioned and locked, the operation is simple, and the large wire capacity of the wire cavity 104 can be ensured.

Preferably, the upper end surface of the bottom plate 102 or the lower end surface of the upper cover plate 103 or both the upper end surface of the bottom plate 102 and the lower end surface of the upper cover plate 103 are provided with wire structures for preventing the loose knotting of the wire, and the wire structures are used for preventing the knotting, the scattering of the wire or the scattering of the wire in the wire cavity 104 when the rotary shuttle rotates at a high speed in the sewing process, and are a plurality of annular bulges 119 arranged at intervals formed by gradually diffusing from the center of the bottom plate 102 to the outer edge of the bottom plate 102, or a plurality of annular bulges 119 arranged at intervals formed by gradually diffusing from the center of the upper cover plate 103 to the outer edge of the upper cover plate 103, and each annular bulge 119 can form resistance to the wire, prevent the wire from being pulled out of the wire cavity 104 or scattered in the fast supply, and can also play a certain guiding role on the wire, so that the wire can be supplied in the direction in which the annular bulge 119 is installed, the sewing quality is improved.

In this embodiment, the side wall of the rotating sleeve 101 is provided with a positioning block 121 which is installed in cooperation with a rotating shuttle of the sewing machine, the shuttle sleeve is installed in the rotating shuttle, the rotating shuttle is installed on the sewing machine, the rotating shuttle is provided with a positioning groove 112 which is installed in cooperation with the positioning block 121, the positioning block 121 is clamped in the positioning groove 112, good positioning of the shuttle sleeve and the rotating shuttle during assembling is ensured, and then normal operation of the rotating shuttle and the shuttle sleeve of the sewing machine is ensured.

To sum up, the embodiment of the present invention provides a bobbin case, wherein a thread ball 50 is accommodated in a thread cavity 104 of a bobbin case body 10, a thread coming out from the thread cavity 104 is combined with a sewing upper thread ring to form a stitch after passing through a thread outlet groove 107 along a thread hole 105 and a thread passing groove 106, a thread pressing plate 30 is arranged above the thread passing groove 106, the thread sticking surface is pressed in the thread passing groove 106 through the thread pressing plate 30 to prevent the thread from running away upwards during sewing, moreover, the thread pressing plate 30 can provide certain pressure to the thread in the thread passing groove 106, thereby ensuring the tension of the thread, furthermore, a thread adjusting mechanism 20 is arranged between the thread passing groove 106 and the thread outlet groove 107, the tension of the thread coming out from the thread outlet groove 107 is further adjusted through the thread adjusting mechanism 20, thereby ensuring the stability and consistency of the thread, particularly, the thread adjusting mechanism 20 comprises a thread adjusting groove 201 and a thread pressing shaft 202, the thread coming out from the thread passing through the thread passing groove 201 and passing between the front end of the pressing shaft 202 and the groove wall of the thread adjusting groove 201 And then, the front end of the wire pressing shaft 202 is adjusted to abut against the wall of the wire adjusting groove 201 by adjusting the adjusting piece at the rear end of the wire pressing shaft 202, so that the pressing force of the front end of the wire pressing shaft 202 to the wire is adjusted, and the wire is adjusted stably in the adjusting process due to the fact that the wire is adjusted together through the inner walls of the wire pressing shaft 202 and the wire adjusting groove 201, and the consistency of the tension of the wire going out from the wire outlet groove 107 can be guaranteed.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The shuttle sleeve is characterized by comprising a shuttle sleeve body, a line pressing plate and a line adjusting mechanism, wherein a line cavity for containing a line ball is arranged in the shuttle sleeve body, the shuttle sleeve body is respectively provided with a line hole, a line passing groove and a line outgoing groove, the line hole is communicated with the line cavity, the line outgoing groove is arranged on the side part of the shuttle sleeve body and is used for connecting the line hole with the line outgoing groove, the line pressing plate is arranged on the shuttle sleeve body and covers the line passing groove, and the line adjusting mechanism is arranged between the line passing groove and the line outgoing groove and is used for adjusting the tightness degree of a line at the front end of the line outgoing groove;

2. The shuttle sleeve according to claim 1, wherein the shuttle sleeve body is provided with a mounting hole for mounting the thread pressing shaft, the mounting hole extends to the outer wall of the shuttle sleeve body to be communicated with the thread adjusting groove, the adjusting member comprises an adjusting screw and an elastic member, the elastic member is connected between the thread pressing shaft and the adjusting screw, and the adjusting screw drives the front end of the thread pressing shaft to gradually abut against the inner wall of the thread adjusting groove by adjusting the depth of the adjusting screw screwed into the mounting hole.

3. The shuttle sleeve according to claim 2, wherein the adjustment screw and the bobbin are both horizontally disposed on the body of the shuttle sleeve and are coaxially disposed.

4. The shuttle sleeve of claim 3, wherein a plurality of guide posts are disposed in the thread guide slots.

5. The shuttle sleeve according to claim 4, wherein the plurality of thread guiding posts are spaced apart from each other at a lower end of the thread tension plate, and the thread guiding groove is provided therein with a fitting hole corresponding to each of the plurality of thread guiding posts.

6. The shuttle sleeve according to any one of claims 1 to 5, wherein the shuttle sleeve body comprises a rotary sleeve, and a bottom plate and an upper cover plate which are detachably connected with the bottom and the top of the rotary sleeve respectively, the rotary sleeve, the bottom plate and the upper cover plate together define the thread cavity, the thread hole is formed in the middle of the upper cover plate, the thread passing groove and the thread adjusting mechanism are formed in the upper cover plate, and the thread outlet groove is formed in the side of the upper cover plate.

7. The shuttle sleeve according to claim 6, wherein the upper cover plate is provided with a positioning structure and a locking structure which are fixedly connected with the rotating sleeve.

8. The shuttle sleeve according to claim 7, wherein the positioning structure comprises a resilient post, a positioning hole formed in the rotating sleeve, and a positioning groove formed in the upper cover plate, one end of the resilient post being disposed in the positioning groove, and the other end thereof being movably engaged with the positioning hole.

9. The shuttle sleeve according to claim 8, wherein a handle is disposed on the resilient post, a stop is disposed on the upper cover plate, and an avoidance groove corresponding to the stop is disposed on the handle.

10. The shuttle sleeve according to claim 7, wherein the locking structure comprises a plurality of hooks disposed at an upper end of the rotating sleeve and a plurality of slots disposed on the upper cover plate and matching with the hooks, and the hooks are spaced apart along a circumferential direction of the rotating sleeve.

11. The shuttle sleeve according to claim 10, wherein a bottom edge of the rotating sleeve extends inwardly to form a coupling portion, and a lower outer edge of the base plate is coupled to the coupling portion.

12. The shuttle sleeve according to claim 8, wherein the upper end surface of the base plate and/or the lower end surface of the upper cover plate is provided with a wire structure for preventing the wire from being loosely knotted.

13. The shuttle sleeve according to claim 12, wherein the conductive structure is a plurality of spaced annular protrusions gradually diffused from a center of the base plate toward an outer edge of the base plate and/or a plurality of spaced annular protrusions gradually diffused from a center of the upper cover plate toward an outer edge of the upper cover plate.

14. The shuttle sleeve according to claim 13, wherein the bottom plate is provided with a through-hole post at a central portion thereof for passing the bobbin therethrough.

15. The shuttle sleeve of claim 14, wherein the through-hole post is frustoconical in configuration.

16. The shuttle sleeve according to any one of claims 1 to 5, wherein a positioning block is provided on a side wall of the rotating sleeve for cooperating with a sewing machine rotating shuttle.