Automatic thread winder and sewing machine

Abstract

The application relates to the technical field of sewing equipment, in particular to an automatic thread winder and a sewing machine. The automatic thread winder comprises a driving assembly, a fixing table, a bobbin, a rotating shaft assembly, a handle assembly and an adjusting assembly, and a rotation-stopping groove is arranged on the rotating shaft assembly. The handle assembly comprises a pressing arm unit, a second rotating shaft and a stopper, the second rotating shaft is rotationally connected with the fixing table, one end of the second rotating shaft is connected with the pressing arm unit, and the other end of the second rotating shaft is connected with the stopper. A third rotating shaft is fixedly arranged on the fixing table, the adjusting assembly is rotationally connected with the third rotating shaft, and the adjusting assembly movably abuts against the stopper along the circumference of the first rotating shaft. The automatic thread winder has a full winding state, when the pressing arm unit is subjected to external force and tends to rotate away from the bobbin, the adjusting assembly can apply force to the stopper, so that the stopper rotates and is clamped in the rotation-stopping groove. The automatic thread winder and the sewing machine provided by the application solve the problems of complex structure and insufficient winding control precision of the existing thread winder.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and in particular to an automatic thread winder and a sewing machine. Background Technology

[0002] In the use of sewing machines, the thread winder, as a key mechanism for pre-winding sewing thread onto the bobbin, directly affects the continuity of sewing production and the quality of the finished product due to its working efficiency and stability. Currently, to overcome the problem that traditional mechanically driven thread winders are difficult to detach from the sewing machine body and achieve independent control of winding speed and amount, some thread winder products have adopted electronic thread winders driven by independent motors.

[0003] However, existing electronic winding machines typically rely on external sensors, such as photoelectric or Hall effect elements, to detect the amount of wire wound in real time. This requires multiple sensing, control, and execution units, resulting in a large number of components, which increases system complexity, makes the overall structure less compact, and raises production and maintenance costs. Furthermore, the accuracy of the detection response and the coordination with the control system is limited, and the adjustment response for winding speed and amount of wire is slow, making it impossible to quickly adapt to different operating conditions. Utility Model Content

[0004] Therefore, it is necessary to provide an automatic wire winder and sewing machine to solve the problems of complex structure and insufficient winding control precision of existing wire winders.

[0005] This application provides an automatic winding device, which includes a drive assembly, a fixed platform, a bobbin, a rotating shaft assembly, a handle assembly, and an adjustment assembly. The output end of the drive assembly is provided with a first rotating shaft. One end of the rotating shaft assembly is connected to the first rotating shaft, and the other end is connected to the bobbin. The rotating shaft assembly is provided with an anti-rotation groove. The fixed platform is connected to the drive assembly. The handle assembly includes a pressure arm unit, a second rotating shaft, and a stop. The second rotating shaft passes through the fixed platform and is rotatably connected to the fixed platform. One end of the second rotating shaft is connected to the pressure arm unit, and the other end is connected to the stop. A third rotating shaft is fixedly mounted on the fixed platform. The adjustment assembly is rotatably connected to the third rotating shaft, and the adjustment assembly moves and abuts against the stop along the circumference of the first rotating shaft. The automatic winding device has a fully wound state. In the fully wound state, when the pressure arm unit is subjected to an external force and tends to rotate away from the bobbin, the adjustment assembly can apply force to the stop to make the stop rotate and lock into the anti-rotation groove.

[0006] In one embodiment, the press arm unit includes a press arm handle and a bobbin clamp, the press arm handle being connected to the second rotating shaft, and the bobbin clamp being connected to the press arm handle and capable of rotating relative to the press arm handle in a direction closer to or further away from the bobbin.

[0007] In one embodiment, the pressure arm unit further includes a fastener, the bobbin clamp has a limit hole and an adjustment hole, the limit hole is rotatably engaged with the second rotating shaft, and the fastener passes through the adjustment hole and is detachably connected to the pressure arm handle.

[0008] In one embodiment, the rotating shaft assembly includes a winding shaft, a pad, and a stop wheel. One end of the winding shaft is connected to the first rotating shaft, and the other end passes through the fixed platform. The pad is sleeved on the outer periphery of the winding shaft and fixedly connected to the winding shaft. The stop wheel is located between the fixed platform and the drive assembly, and is sleeved on the outer periphery of the pad, engaging with the pad to prevent rotation. An anti-rotation groove is formed on the stop wheel. The bobbin is placed on the pad, and the bobbin is engaged with the end of the winding shaft away from the first rotating shaft.

[0009] In one embodiment, the spindle assembly further includes an elastic element connected to the outer periphery of the winding shaft and extending axially along the winding shaft so that the elastic element can be clamped between the pad, the bobbin, and the winding shaft.

[0010] In one embodiment, the spindle assembly further includes a wire cutter disposed between the pad and the bobbin, and fixedly connected to the pad.

[0011] In one embodiment, a fixing post is provided on the fixing platform, and the adjusting assembly includes an adjusting plate and a tension spring. The adjusting plate is rotatably connected to the third rotating shaft. Along the circumference of the first rotating shaft, one end of the adjusting plate is connected to the fixing post through the tension spring, and the other end is movably abutting against the stop. A slot is provided on the end of the adjusting plate near the stop. The automatic winding device also includes an initial state. From the initial state to the fully wound state, the direction of the force exerted by the adjusting plate on the stop at the contact point is oriented towards the axis of the second rotating shaft, and the contact point of the stop and the adjusting plate moves towards the slot. In the fully wound state, when the pressure arm unit is subjected to an external force and tends to rotate away from the bobbin, the direction of the force exerted by the adjusting plate on the stop at the contact point is offset from the axis of the second rotating shaft, so that part of the stop can be engaged in the slot.

[0012] In one embodiment, the automatic winding device further includes a reset state, in which the projection of the pressure arm unit along the first rotating shaft axis and the projection of the bobbin along the first rotating shaft axis axis are spaced apart, and a portion of the stop member is engaged in the anti-rotation groove; the automatic winding device further includes a switch member, the switch member is fixedly connected to the drive assembly and electrically connected to the drive assembly to form an on / off circuit, a trigger member is connected to the stop member, and the switch member can cooperate or decouple with the trigger member to conduct or disconnect the on / off circuit.

[0013] In one embodiment, the trigger is configured as a magnet, the switch is configured as a reed switch, a capacitive switch, or a micro switch, and when the stop is in the reset state, the trigger moves away from the switch to disconnect the on / off circuit; when the stop rotates from the reset state to the fully rotated state, the trigger moves closer to the switch and engages with the switch to connect the on / off circuit. Alternatively, the switch is configured as a normally closed switch, the trigger is configured as a pin or screw, and when the stop is in the reset state, the trigger abuts against the switch to disconnect the on / off circuit; when the stop rotates from the reset state to the fully rotated state, the trigger moves away from the switch to connect the on / off circuit.

[0014] This application also provides a sewing machine that includes the automatic winding device described in any of the above embodiments.

[0015] Compared with existing technologies, the automatic winding device and sewing machine provided in this application, through the relative movement of the pressure arm unit, the stop, and the adjustment assembly, can control the rotation of the spindle assembly after the bobbin is fully wound. This is achieved through the mechanical cooperation of the stop and the anti-rotation groove, ensuring that the spindle assembly and the bobbin can stop rotating immediately, effectively improving the accuracy of thread control. Furthermore, this application has fewer components than traditional structures, and all components are integrated and installed on the same side of the drive assembly. This makes the overall structure of the automatic winding device more compact. Additionally, the handle assembly and the adjustment assembly can be fixed using a mounting platform, simplifying installation and increasing structural stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A schematic diagram of the structure of an automatic winding device according to an embodiment of this application;

[0018] Figure 2 An exploded view of an embodiment of an automatic winding device provided in this application;

[0019] Figure 3 A schematic diagram of the pressure arm unit in its initial state according to an embodiment of this application;

[0020] Figure 4 A schematic diagram of the stop and adjusting plate in the initial state according to an embodiment provided in this application;

[0021] Figure 5 A schematic diagram of the pressure arm unit in the fully wound state according to an embodiment of this application;

[0022] Figure 6 A schematic diagram of the stop and adjusting plate in the fully wound state according to an embodiment provided in this application;

[0023] Figure 7 A schematic diagram of the pressure arm unit in the reset state according to an embodiment of this application;

[0024] Figure 8 A schematic diagram of the stop and adjusting plate in the reset state according to an embodiment provided in this application;

[0025] Figure 9 A schematic diagram of an automatic winding device according to an embodiment of this application;

[0026] Figure 10 A schematic diagram of the structure of an automatic winding device according to an embodiment of this application;

[0027] Figure 11 A schematic diagram of the structure of a switch element according to an embodiment of this application;

[0028] Figure 12 A schematic diagram of the on / off circuit of an embodiment provided in this application;

[0029] Figure 13 An exploded view of a portion of the structure of an automatic winding device according to an embodiment provided in this application.

[0030] The symbols in the diagram represent the following meanings:

[0031] 100. Automatic winding device; 10. Drive assembly; 11. First rotating shaft; 12. Fixing plate; 13. PCB board; 131. Switch; 20. Fixing platform; 21. Third rotating shaft; 22. Fixing post; 30. Bobbin; 40. Rotating shaft assembly; 401. Anti-rotation groove; 41. Winding shaft; 42. Pad; 43. Stop wheel; 44. Elastic element; 45. Wire cutter; 50. Handle assembly; 501. Limiting hole; 502. Adjustment hole; 51. Pressure arm unit; 511. Pressure arm handle; 512. Bobbin clamp; 513. Fastener; 52. Second rotating shaft; 53. Stop element; 531. Trigger element; 54. First retaining ring; 55. Washer; 60. Adjustment assembly; 601. Slot; 61. Adjustment plate; 62. Tension spring; 63. Second retaining ring. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0037] In the use of sewing machines, the thread winder, as a key mechanism for pre-winding sewing thread onto the bobbin, directly affects the continuity of sewing production and the quality of the finished product due to its working efficiency and stability. Currently, to overcome the problem that traditional mechanically driven thread winders are difficult to detach from the sewing machine body and achieve independent control of winding speed and amount, some thread winder products have adopted electronic thread winders driven by independent motors.

[0038] However, existing electronic winding machines typically rely on external sensors, such as photoelectric or Hall effect elements, to detect the amount of wire wound in real time. This requires multiple sensing, control, and execution units, resulting in a large number of components, which increases system complexity, makes the overall structure less compact, and raises production and maintenance costs. Furthermore, the accuracy of the detection response and the coordination with the control system is limited, and the adjustment response for winding speed and amount of wire is slow, making it impossible to quickly adapt to different operating conditions.

[0039] Please see Figures 1-13To address the problems of complex structure and insufficient winding control precision in existing winding devices, this application provides an automatic winding device 100. The automatic winding device 100 includes a drive assembly 10, a fixed platform 20, a bobbin 30, a rotating shaft assembly 40, a handle assembly 50, and an adjustment assembly 60. The output end of the drive assembly 10 is provided with a first rotating shaft 11. One end of the rotating shaft assembly 40 is connected to the first rotating shaft 11, and the other end is connected to the bobbin 30. The rotating shaft assembly 40 is provided with an anti-rotation groove 401. The fixed platform 20 is connected to the drive assembly 10. The handle assembly 50 includes a pressure arm unit 51, a second rotating shaft 52, and a stop member 53. The second rotating shaft 52 passes through the fixed platform 20 and is rotatably connected to it. One end of the second rotating shaft 52 is connected to the pressure arm unit 51, and the other end is connected to the stop member 53. A third rotating shaft 21 is fixed on the fixed platform 20. The adjusting component 60 is rotatably connected to the third rotating shaft 21, and the adjusting component 60 moves and abuts against the stop member 53 along the circumference of the first rotating shaft 11. The automatic winding machine 100 has a fully wound state. In the fully wound state, when the pressure arm unit 51 is subjected to external force and tends to rotate away from the bobbin 30, the adjusting component 60 can apply force to the stop member 53 to make the stop member 53 rotate and lock into the anti-rotation groove 401.

[0040] It should be noted that as the bobbin 30 rotates with the rotating shaft assembly 40, the sewing thread will be wound around the shaft of the bobbin 30. The fully wound state of the automatic winding device 100 means that the amount of sewing thread wound on the shaft of the bobbin 30 has reached the preset value.

[0041] It should also be noted that the first rotating shaft 11, the second rotating shaft 52, and the third rotating shaft 21 are arranged in parallel axial directions.

[0042] Understandably, this application, through the relative movement of the pressure arm unit 51, the stop member 53, and the adjustment component 60, can control the rotation of the shaft assembly 40 after the bobbin 30 is fully wound, through the mechanical cooperation of the stop member 53 and the anti-rotation groove 401. This ensures that the shaft assembly 40 and the bobbin 30 can stop rotating immediately, effectively improving the accuracy of thread control. Furthermore, this application has fewer parts than traditional structures, and all parts are integrated and installed on the same side of the drive assembly 10. This makes the overall structure of the automatic winder 100 more compact. At the same time, both the handle assembly 50 and the adjustment component 60 can be fixed by the fixing platform 20, which simplifies installation and increases structural stability.

[0043] To achieve automatic adjustment of the adjustment component 60 after the bobbin 30 is fully wound, in one embodiment, such as... Figure 2As shown, a fixed column 22 is provided on the fixed platform 20. Both the fixed column 22 and the third rotating shaft 21 are located at one end of the fixed platform 20 near the drive assembly 10, and the fixed column 22 and the third rotating shaft 21 are spaced apart in the circumferential direction of the fixed platform 20. Here, the fixed column 22 and the third rotating shaft 21 not only serve to connect with the adjustment assembly 60, but can also be used to connect with the drive assembly 10. For example, they can be threaded onto the fixed plate 12 on the drive assembly 10 by bolts or the like.

[0044] Specifically, the adjusting assembly 60 includes an adjusting plate 61 and a tension spring 62. The adjusting plate 61 is rotatably connected to the third rotating shaft 21. Along the circumference of the first rotating shaft 11, one end of the adjusting plate 61 is connected to the fixing post 22 via the tension spring 62, and the other end is in movable contact with the stop member 53. A slot 601 is provided at the end of the adjusting plate 61 near the stop member 53. The tension spring 62 always exerts a pulling force on the adjusting plate 61, allowing the adjusting plate 61 to rotate around the third rotating shaft 21, thereby facilitating the engagement between the adjusting plate 61 and the stop member 53.

[0045] The automatic winding device 100 also includes an initial state and a reset state. In the initial state, there is no sewing thread wound on the shaft of the bobbin 30. At this time, as... Figure 3 and Figure 4 As shown, the pressure arm unit 51 contacts the arc surface on the bobbin 30 shaft, the stop 53 moves away from the anti-rotation groove 401, and the rotating shaft assembly 40 can rotate freely. Then, the driving assembly 10 drives the rotating shaft assembly 40 and the bobbin 30 to rotate synchronously. The amount of yarn on the bobbin 30 gradually increases. As the amount of yarn increases, the yarn on the bobbin 30 will gradually push the pressure arm unit 51 outwards until the amount of yarn reaches a preset value. (See reference...) Figure 5 and Figure 6At this point, the automatic winder 100 is in a fully wound state. During the process from the initial state to the fully wound state, as the pressure arm unit 51 gradually rotates outward, it can drive the stop 53 to rotate towards the direction of the rotating shaft unit via the second rotating shaft 52. Simultaneously, since the adjusting plate 61 is rotatably connected to the third rotating shaft 21, the adjusting plate 61 does not obstruct the rotation of the stop 53, allowing for smoother rotation. During this process, the force applied by the adjusting plate 61 to the stop 53 at the contact point is directed towards the axis of the second rotating shaft 52, thereby preventing the force exerted by the adjusting plate 61 on the stop 53 from causing it to rotate and thus affecting the fit between the pressure arm unit 51 and the bobbin 30. In other words, in this embodiment, the adjusting plate 61 can limit the movement of the pressure arm unit 51, ensuring stable rotation. Furthermore, during the process from the initial state to the fully wound state, the contact point between the stop 53 and the adjusting plate 61 moves toward the direction closer to the slot 601. In the fully wound state, the stop 53 and the slot 601 on the adjusting plate 61 are in a critical fit state. When the pressure arm unit 51 is subjected to external force and tends to rotate away from the bobbin 30, the direction of the force applied by the adjusting plate 61 to the stop 53 at the contact point is offset from the axis of the second rotating shaft 52, so that part of the stop 53 can be inserted into the slot 601. The external force here mainly refers to the force acting on the pressure arm unit 51 as the amount of wire continues to increase. That is, if the amount of wire continues to increase when the winding is full, it will disrupt the critical state between the stop 53 and the adjusting plate 61. Under the action of the tension spring 62, the adjusting plate 61 will force the stop 53 to rotate, causing part of the stop 53 to be stuck in the slot 601. The part of the stop 53 that cooperates with the anti-rotation slot 401 will also be stuck in the anti-rotation slot 401, thereby stopping the winding and achieving precise control of the amount of wire.

[0046] When the stop 53 engages with the slot 601 and the anti-rotation slot 401, such as Figure 7 and Figure 8 As shown, this corresponds to the reset state of the automatic winder 100, where the rotation of the shaft assembly 40 is restricted and cannot be rotated. Simultaneously, in the reset state, the projection of the pressure arm unit 51 along the axial direction of the first rotating shaft 11 and the projection of the bobbin 30 along the axial direction of the first rotating shaft 11 are spaced apart. That is, the pressure arm unit 51 is disengaged from the bobbin 30, allowing the bobbin 30 to be freely removed.

[0047] It should be noted here that, as Figure 9As shown, during the process from the fully wound state to the reset state, the stop 53 moves out of the critical state and into the slot 601 at a relatively fast speed. This causes the stop 53 to move to the reset state instantly, which not only stops the rotation of the shaft assembly 40, but also drives the pressure arm unit 51 to pop out and move to the reset state instantly. Therefore, the movement of the pressure arm unit 51 during the process from the fully wound state to the reset state is an empty stroke and does not correspond to an increase in the amount of wire, thus ensuring that the same winding value can be maintained for multiple windings.

[0048] It should also be noted that the force direction at the contact point between the adjusting plate 61 and the stop 53 can be controlled by changing the shape of the contact surface. This can be implemented with reference to existing technologies, and will not be elaborated further here.

[0049] In this embodiment, the amount of yarn in the fully wound state can be adjusted. Based on this, the pressure arm unit 51 includes a pressure arm handle 511 and a bobbin clamp 512. The pressure arm handle 511 is connected to the second rotating shaft 52, and the bobbin clamp 512 is connected to the pressure arm handle 511 and can rotate relative to the pressure arm handle 511 in a direction closer to or further away from the bobbin 30. Thus, by controlling the angle of the bobbin clamp 512 relative to the pressure arm handle 511, the preset amount of yarn in the fully wound state can be adjusted.

[0050] Specifically, the pressure arm unit 51 also includes a fastener 513. The bobbin clamp 512 has a limiting hole 501 and an adjusting hole 502. The limiting hole 501 rotatably engages with the second rotating shaft 52. The fastener 513 passes through the adjusting hole 502 and is detachably connected to the pressure arm handle 511. Thus, after the bobbin clamp 512 rotates around the second rotating shaft 52, it is locked by the fastener 513, allowing the angle of the bobbin clamp 512 relative to the pressure arm handle 511 to be changed. The overall adjustment is simple and the processing is convenient. The adjusting hole 502 can be a slotted hole, or multiple adjusting holes 502 can be provided for easy adjustment.

[0051] For example, Figure 5 The fully wound state shown corresponds to 90% of the bobbin 30 being fully wound. To change the amount of yarn in this fully wound state, first maintain the relative positions of the adjusting plate 61 and the stop 53, then loosen the fastener 513 and adjust the angle between the bobbin clamp 512 and the pressure arm handle 511. Increasing the angle between the bobbin clamp 512 and the pressure arm handle 511 corresponds to a decrease in the amount of yarn, while decreasing the angle corresponds to an increase in the amount of yarn. Taking an increase in the angle between the bobbin clamp 512 and the pressure arm handle 511 as an example, after adjustment, tighten the fastener 513 again. This way, during the next winding, the pressure arm unit 51 will pop out when the amount of yarn reaches 80%, simultaneously stopping the winding process.

[0052] In one embodiment, such as Figure 2As shown, the handle assembly 50 also includes a first retaining ring 54, which is disposed between the fixed platform 20 and the pressure arm unit 51 to limit the second rotating shaft 52 and ensure the stable installation of the second rotating shaft 52.

[0053] Furthermore, the handle assembly 50 also includes a washer 55 disposed between the first retaining spring 54 and the fixed platform 20. This reduces wear on the first retaining spring 54 and the fixed platform 20 during the rotation of the pressure arm unit 51, thereby improving the service life of the overall structure.

[0054] To ensure the stable installation of the adjusting plate 61, in one embodiment, the adjusting assembly 60 further includes a second retaining spring 63. A groove (not shown) is recessed on the outer wall of the third rotating shaft 21. The second retaining spring 63 can be inserted into the groove to cooperate with the fixed platform 20 to clamp the adjusting plate 61 and prevent the adjusting plate 61 from moving axially.

[0055] In one embodiment, such as Figure 2 As shown, the rotating shaft assembly 40 includes a winding shaft 41, a pad 42, and a stop wheel 43. One end of the winding shaft 41 is connected to the first rotating shaft 11, and the other end passes through the fixing platform 20. The pad 42 is fitted around the outer periphery of the winding shaft 41 and is fixedly connected to the winding shaft 41. The stop wheel 43 is located between the fixing platform 20 and the drive assembly 10, and is fitted around the outer periphery of the pad 42, engaging with the pad 42 to prevent rotation. An anti-rotation groove 401 is formed on the stop wheel 43. The bobbin 30 is placed on the pad 42, and the bobbin 30 is engaged with the end of the winding shaft 41 away from the first rotating shaft 11. This facilitates the installation of the bobbin 30.

[0056] Optionally, the stop wheel 43 can be fixed by an interference fit with the liner 42. At the same time, the contact surface between the stop wheel 43 and the liner 42 is at least partially set as a plane, thereby preventing relative rotation.

[0057] Furthermore, in one embodiment, the spindle assembly 40 further includes an elastic element 44, which is connected to the outer periphery of the winding shaft 41 and extends axially along the winding shaft 41, so that the elastic element 44 can be clamped between the pad 42, the bobbin 30, and the winding shaft 41. In this way, the pad 42 and the winding shaft 41 cooperate to clamp the elastic element 44, preventing the elastic element 44 from dislodging, thereby improving the stability and safety of the structure. Simultaneously, the winding shaft 41 can fix the bobbin 30 through the elastic element 44, achieving relative fixation of their positions, and making overall installation more convenient and quick.

[0058] Furthermore, in one embodiment, the spindle assembly 40 also includes a thread cutter 45, which is disposed between the pad 42 and the bobbin 30 and is fixedly connected to the pad 42. Thus, when the spindle assembly 40 stops rotating, the thread cutter 45 is in the same position relative to the bobbin 30, allowing the user to easily cut the sewing thread using the thread cutter 45.

[0059] In one embodiment, such as Figures 10-12 As shown, the automatic winding device 100 also includes a switch 131, which is fixedly connected to the drive assembly 10 and electrically connected to the drive assembly 10 to form an on / off circuit. A trigger 531 is connected to the stop 53, and the switch 131 can engage or disengage with the trigger 531 to connect or disconnect the on / off circuit. Thus, the on / off state of the circuit is controlled simultaneously by the relative movement of the stop 53, resulting in stronger linkage and higher integration of the entire structure.

[0060] The switch 131 can be fixedly connected to the mounting plate 12 of the drive assembly 10 via a PCB board 13 (Printed Circuit Board), and can be electrically connected to each other via wire harnesses, etc.

[0061] It should be noted that the trigger 531 and the switch 131 can be non-contact or contact detection, as long as they can achieve the function of switching the circuit on and off. For example, in one embodiment, such as Figure 10 As shown, the trigger 531 can be configured as a magnet, and the switch 131 can be configured as a reed switch, a capacitive switch, or a micro switch, etc. In this embodiment, the switch 131 is preferably a reed switch. The non-contact triggering by the magnet and the reed switch results in fast response, high reliability of winding start and stop, ensuring winding consistency and stability, and effectively improving the quality of the finished product. Thus, when the stop 53 is in the reset state, the trigger 531 moves away from the switch 131 to disconnect the on / off circuit. When the stop 53 rotates from the reset state towards the fully wound state, the trigger 531 approaches the switch 131 and engages with it to connect the on / off circuit.

[0062] In the automatic winding device 100 of this embodiment, as Figure 9As shown, the dashed line represents the position of the stop member 53 in the fully wound state, and the solid line represents the position of the stop member 53 in the reset state. The timing of the circuit connection is between the rotation of the stop member 53 from the reset state to the fully wound state. That is, taking the trigger member 531 as a magnet and the switch member 131 as a reed switch as an example, during the rotation of the stop member 53, the stop member 53 can drive the magnet to move closer to the reed switch, thereby causing the reed switch to sense the signal from the magnet and realize the circuit connection. However, since the stop member 53 is still in a locked state with the anti-rotation groove 401 at this time, the first rotating shaft 11 of the drive assembly 10 cannot drive the rotating shaft assembly 40 to rotate. Only when the stop member 53 moves to the fully wound state can the rotating shaft assembly 40 rotate. Here, the pressure arm unit 51 can be manually pushed directly from the reset state to the initial state, and during this period, the circuit connection is automatically realized, thereby realizing automatic winding.

[0063] When the automatic winder 100 is in the reset state, the magnet on the stop 53 moves away from the reed switch, causing the reed switch to disconnect internally and the entire circuit to break. At this time, the motor in the drive assembly 10 is not energized and will not wind. As the stop 53 rotates from the reset state to the fully wound state, the magnet approaches the reed switch, which is affected and begins to close, connecting the entire circuit and energizing the motor. When the stop 53 reaches the fully wound position, the motor is not limited by the parts and can rotate to wind. When the stop 53 returns to the initial position, the reed switch is still closed, and the motor continues to wind. During the winding process, as the amount of yarn in the bobbin 30 increases, it pushes the pressure arm unit 51 to move outward. When the stop 53 moves to the fully wound position, if the amount of yarn increases slowly, the stop 53 will immediately engage in the slot 601 of the adjusting plate 61 under the spring force of the tension spring 62. The magnet moves away from the reed switch, the reed switch disconnects, the entire circuit breaks, and the motor stops running. In other words, this application relies on a mechanical structure to control the on / off state of the circuit. Therefore, the electronic control only serves as a power source and does not need to control the motor. At the same time, the determinability of the mechanical position also ensures the stability of the winding amount. As a result, there is no need for a separate control chip, reducing the number of sensors and electronic control components, resulting in high system integration, simple assembly, and reduced manufacturing and maintenance costs.

[0064] Since the distance between the trigger element 531 and the switch element 131 affects the continuity of the entire circuit, the installation position of the switch element 131 needs to be adjusted. Therefore, in one embodiment, as follows... Figure 11 As shown, a waist-shaped hole can be made on the PCB board 13, and the device can be connected to the fixing plate 12 of the drive assembly 10 through the waist-shaped hole for easy adjustment.

[0065] In another embodiment, such as Figure 13As shown, the switch 131 can also be configured as a normally closed switch, and the trigger 531 can be configured as a pin or screw. When the stop 53 is in the reset state, the trigger 531 abuts against the switch 131 to disconnect the on / off circuit. When the stop 53 rotates from the reset state towards the fully open state, the trigger 531 moves away from the switch 131 to connect the on / off circuit. In this way, the on / off circuit can also be connected and disconnected. Preferably, the trigger 531 can be a ball screw to reduce the difficulty of fitting.

[0066] This application also provides a sewing machine including the automatic thread winder 100 of any of the above embodiments. The automatic thread winder 100 can operate independently, no longer limited by the operating status of the main sewing machine, improving usability and production cycle efficiency, and is particularly suitable for multi-station, distributed automated sewing scenarios. Simultaneously, it automatically determines the thread winding status using mechanical circuit logic, achieving automatic stop when fully wound, without manual judgment or intervention. Furthermore, thread quantity adjustment is intuitive and convenient, adapting to different working conditions.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. An automatic winding device, characterized in that, It includes a drive assembly (10), a fixed platform (20), a bobbin (30), a pivot assembly (40), a handle assembly (50), and an adjustment assembly (60). The output end of the drive assembly (10) is provided with a first pivot (11). One end of the pivot assembly (40) is connected to the first pivot (11), and the other end is connected to the bobbin (30). The pivot assembly (40) is provided with an anti-rotation groove (401). The fixed platform (20) is connected to the drive assembly (10). The handle assembly (50) includes a pressure arm unit (51), a second rotating shaft (52), and a stop (53). The second rotating shaft (52) passes through the fixed platform (20) and is rotatably connected to the fixed platform (20). One end of the second rotating shaft (52) is connected to the pressure arm unit (51), and the other end is connected to the stop (53). A third rotating shaft (21) is fixed on the fixed platform (20), the adjusting component (60) is rotatably connected to the third rotating shaft (21), and the adjusting component (60) moves against the stop (53) along the circumference of the first rotating shaft (11). The automatic winder has a fully wound state. In the fully wound state, when the pressure arm unit (51) is subjected to an external force and tends to rotate away from the bobbin (30), the adjustment component (60) can apply force to the stop (53) so that the stop (53) rotates and is locked in the anti-rotation groove (401).

2. The automatic winding device according to claim 1, characterized in that, The press arm unit (51) includes a press arm handle (511) and a bobbin clamp (512). The press arm handle (511) is connected to the second rotating shaft (52), and the bobbin clamp (512) is connected to the press arm handle (511) and can rotate relative to the press arm handle (511) in a direction closer to or further away from the bobbin (30).

3. The automatic winding device according to claim 2, characterized in that, The pressure arm unit (51) also includes a fastener (513). The bobbin clamp (512) has a limiting hole (501) and an adjustment hole (502). The limiting hole (501) is rotatably engaged with the second rotating shaft (52). The fastener (513) passes through the adjustment hole (502) and is detachably connected to the pressure arm handle (511).

4. The automatic winding device according to claim 1, characterized in that, The rotating shaft assembly (40) includes a winding shaft (41), a pad (42) and a stop wheel (43). One end of the winding shaft (41) is connected to the first rotating shaft (11), and the other end passes through the fixed platform (20). The pad (42) is sleeved on the outer periphery of the winding shaft (41) and fixedly connected to the winding shaft (41). The stop wheel (43) is located between the fixed platform (20) and the drive assembly (10), and the stop wheel (43) is sleeved on the outer periphery of the liner (42) and engages with the liner (42) to prevent rotation. The anti-rotation groove (401) is opened on the stop wheel (43). The bobbin (30) is placed on the pad (42), and the bobbin (30) is engaged with the end of the winding shaft (41) away from the first rotating shaft (11).

5. The automatic winding device according to claim 4, characterized in that, The spindle assembly (40) further includes an elastic element (44) connected to the outer periphery of the winding shaft (41) and extending axially along the winding shaft (41) so that the elastic element (44) can be clamped between the pad (42), the bobbin (30) and the winding shaft (41).

6. The automatic winding device according to claim 4, characterized in that, The rotating shaft assembly (40) also includes a wire cutter (45), which is disposed between the pad (42) and the bobbin (30) and is fixedly connected to the pad (42).

7. The automatic winding device according to claim 1, characterized in that, The fixed platform (20) is provided with a fixed column (22). The adjustment assembly (60) includes an adjustment plate (61) and a tension spring (62). The adjustment plate (61) is rotatably connected to the third rotating shaft (21). Along the circumference of the first rotating shaft (11), one end of the adjustment plate (61) is connected to the fixed column (22) through the tension spring (62), and the other end is in contact with the stop (53). A slot (601) is provided at one end of the adjustment plate (61) near the stop (53). The automatic winder also includes an initial state, and during the process from the initial state to the fully wound state, the direction of the force exerted by the adjusting plate (61) on the stop (53) at the contact point is set toward the axis of the second rotating shaft (52), and the contact point of the stop (53) and the adjusting plate (61) is moved toward the direction closer to the slot (601); in the fully wound state, when the pressure arm unit (51) is subjected to an external force and tends to rotate away from the bobbin (30), the direction of the force exerted by the adjusting plate (61) on the stop (53) at the contact point is offset from the axis of the second rotating shaft (52), so that a portion of the stop (53) can be inserted into the slot (601).

8. The automatic winding device according to claim 1, characterized in that, The automatic winding device also includes a reset state, in which the projection of the pressure arm unit (51) along the axial direction of the first rotating shaft (11) and the projection of the bobbin (30) along the axial direction of the first rotating shaft (11) are spaced apart, and part of the stop member (53) is engaged in the anti-rotation groove (401). The automatic winding device also includes a switch (131), which is fixedly connected to the drive assembly (10) and electrically connected to the drive assembly (10) to form an on / off circuit. A trigger (531) is connected to the stop (53). The switch (131) can cooperate with or decouple from the trigger (531) to conduct or disconnect the on / off circuit.

9. The automatic winding device according to claim 8, characterized in that, The trigger (531) is configured as a magnet, the switch (131) is configured as a reed switch, a capacitive switch or a micro switch, and when the stop (53) is in the reset state, the trigger (531) moves away from the switch (131) to disconnect the on / off circuit. When the stop (53) rotates from the reset state to the full rotation state, the trigger (531) moves closer to the switch (131) and engages with the switch (131) to conduct the on / off circuit. Alternatively, the switch (131) may be configured as a normally closed switch, the trigger (531) may be configured as a pin or screw, and when the stop (53) is in the reset state, the trigger (531) abuts against the switch (131) to disconnect the on / off circuit, and when the stop (53) rotates from the reset state toward the full rotation state, the trigger (531) moves away from the switch (131) to connect the on / off circuit.

10. A sewing machine, characterized in that, Includes the automatic winding device as described in any one of claims 1-9.

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