Sewing device and thread trimming control method thereof

Abstract

The invention relates to a sewing device and a thread trimming control method thereof, and the sewing device comprises a machine needle component which can drive an upper thread to form a thread ring when rising back from a lowest working position to a thread trimming working position; the thread trimming component is arranged at the thread trimming working position; the electrostatic field generating unit can generate an electrostatic field acting on the thread ring before the thread trimming component executes the thread trimming operation; under the action of the electrostatic field, the wire ring is polarized and tensioned in the hooking direction of the wire cutting component, so that the wire ring is matched with the wire cutting component when the wire ring is located at the wire cutting working position. According to the application, the directional electrostatic field is applied in the key stage of forming the thread ring by the needle recovery, non-contact active control of the thread ring form is realized, and the technical problem of how to actively control the geometric form of the thread ring in the thread ring forming stage in the prior art in a non-contact manner so as to fundamentally ensure the thread hooking reliability of the thread trimming mechanism is solved.

Description

Technical Field

[0001] This application relates to the field of sewing device thread cutting control technology, and in particular to a sewing device and its thread cutting control method. Background Technology

[0002] In industrial sewing machines, the thread-cutting action requires the thread-cutting mechanism to successfully hook and cut the loop of thread formed by the thread on the needle component. Therefore, the geometry and spatial position of the loop at the moment of hooking the thread are key factors affecting the success rate of thread cutting.

[0003] In existing technologies, pressure sensors detect the pressure between the clamping plates, and electromagnets are used to adjust the clamping force of the plates to achieve precise control of the tension in the face thread. The core of this approach lies in regulating the longitudinal tension of the face thread through mechanical contact. However, in the instant before cutting, the stability of the thread loop primarily manifests in its three-dimensional shape and position. This approach targets tension, and its control mechanism addresses the tightness of the wire, rather than directly intervening in the loop's unfolding and spatial orientation. Therefore, existing technologies cannot effectively stabilize and control the geometric shape and spatial position of the thread loop in the critical stage before cutting.

[0004] There is currently no effective solution to the technical problem of how to actively and non-contactly control the geometry of the wire ring during the formation stage to fundamentally ensure the hooking reliability of the wire cutting mechanism. Summary of the Invention

[0005] This application provides a thread-cutting control method and apparatus for sewing equipment to solve the technical problem in the related art of how to actively and non-contactly control the geometry of the thread loop during the formation stage, so as to fundamentally ensure the thread hooking reliability of the thread-cutting mechanism.

[0006] In a first aspect, this application provides a sewing device, comprising:

[0007] The needle component is used to drive the thread to form a loop when it rises from the lowest working position to the thread cutting position;

[0008] A wire-cutting component is provided at the wire-cutting work station;

[0009] An electrostatic field generating unit is used to generate an electrostatic field acting on the wire loop before the wire cutting component performs the wire cutting operation;

[0010] Under the action of the electrostatic field, the wire loop is polarized and tensioned in the hooking direction of the wire-cutting member, so that the wire loop is adapted to the wire-cutting member when it is in the wire-cutting working position.

[0011] In some embodiments, the electrostatic field generating unit includes a power supply and an electrode plate;

[0012] The power supply is connected to the electrode plate and is used to output a DC signal to the electrode plate;

[0013] The electrode plate is fixed inside the sewing device by an insulating component and is located in the hooking direction of the thread cutting component;

[0014] The electrode plate is used to generate the electrostatic field and to ensure that the electrostatic field at least covers the wire-cutting work position.

[0015] In some further embodiments, the electrode plate is arranged along the needle return path between the lowest working position and the wire cutting working position, such that the electrostatic field covers the needle return path.

[0016] In some embodiments, a processor is also included;

[0017] The processor is configured to generate a first control signal in response to a needle return trigger signal and a thread-cutting command from the sewing device; the processor is also configured to control the electrostatic field generating unit based on the first control signal, so that it generates an electrostatic field acting on the thread loop before the thread-cutting member performs the thread-cutting operation.

[0018] In some further embodiments, it also includes:

[0019] The feedback unit is used to provide real-time feedback on the current surface parameters and electrostatic field strength.

[0020] The microcontroller has a pre-stored sewing pattern; the sewing pattern includes at least the mapping relationship between the thread parameters and the electrostatic field strength.

[0021] The microcontroller is used to generate a second control signal based on the sewing pattern and the current thread parameters; the microcontroller is also used to adjust the intensity and duration of the electrostatic field based on the second control signal.

[0022] In some further embodiments, a detection unit is also included for detecting the displacement state of the needle component;

[0023] The detection unit is used to generate a needle return trigger signal when the needle component returns from the lowest working position;

[0024] Alternatively, the detection unit may be used to generate a needle return trigger signal after the needle component has returned from the lowest working position and before it reaches the thread cutting working position.

[0025] In some further embodiments, the detection unit is a photoelectric sensor;

[0026] The photoelectric sensor is disposed at the lowest working position or at any position between the lowest working position and the wire cutting working position;

[0027] The photoelectric sensor is used to identify the mark on the needle component to obtain the displacement state.

[0028] In some further embodiments, the detection unit is a rotary encoder;

[0029] The rotary encoder is mounted on the rotating shaft that drives the needle component;

[0030] The rotary encoder is used to obtain the displacement state by analyzing the angular displacement of the rotating shaft.

[0031] In some embodiments, the wire-cutting component includes a movable shear and a fixed shear; the movable and fixed shears are used to cooperate with each other to perform a wire-cutting operation on a tensioned loop.

[0032] Secondly, this application provides a thread-cutting control method for a sewing device, comprising:

[0033] When the needle component drives the thread to rise from the lowest working position to the cutting position, an electrostatic field is generated on the loop formed by the thread, causing the loop to polarize.

[0034] The electrostatic field generating unit adsorbs and polarizes the wire loop, causing the wire loop to be tensioned in the hooking direction of the wire cutting component, so that the wire loop is adapted to the wire cutting component when it is in the wire cutting working position;

[0035] The wire-cutting component is used to perform a wire-cutting operation on the tensioned wire loop.

[0036] Compared with the prior art, the embodiments of this application have the following beneficial effects:

[0037] This invention adds an electrostatic field generating unit to the sewing device. The electrostatic field generated by this unit acts on the thread loop non-contactly before the thread cutting operation, polarizing it and actively tensioning it in the hooking direction of the thread cutting component. This directly and precisely controls the tensioning direction during the thread loop formation stage, constraining the originally easily disturbed and unstable thread loop into an ideal state that is always adapted to the thread cutting component at the thread cutting position. This fundamentally solves the problem of hooking failure caused by thread loop twisting, offset, or collapse, and significantly improves the reliability and success rate of the thread cutting action.

[0038] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0040] Figure 1 This is a structural diagram of a sewing device provided in an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of the loop shape without the action of an electrostatic field according to an embodiment of this application;

[0042] Figure 3 This is a block diagram of an embodiment of the present application providing control of an electrostatic field generating unit based on a first control signal;

[0043] Figure 4 This is a block diagram of the electrostatic field generating unit controlled by a second control signal according to an embodiment of this application;

[0044] Figure 5 This is a flowchart of a thread-cutting control method for a sewing device provided in an embodiment of this application.

[0045] In the diagram: 110, needle component; 111, thread loop; 120, thread cutting component; 130, electrostatic field generating unit. Detailed Implementation

[0046] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order.

[0048] This embodiment provides a sewing device. Figure 1 This is a structural diagram of the sewing device in this embodiment. Figure 2 This is a schematic diagram of the loop shape provided in this embodiment when there is no electrostatic field, as shown below. Figure 1 and Figure 2 As shown, the sewing device specifically includes: a needle component 110, a thread-cutting component 120, and an electrostatic field generating unit 130.

[0049] It is understood that the needle in the needle component 110 can penetrate the fabric and pull the top thread, enabling the top thread to interweave with the bobbin thread below the fabric to achieve sewing. In this embodiment, the three key positions of the needle component 110 during the sewing process are defined as the lowest working position, the thread-cutting working position, and the highest working position. The lowest working position refers to the lowest position reached after the needle pierces the fabric. The thread-cutting working position refers to the optimal position where the top thread forms a stable loop 111 and is hooked by the scissors after the needle rises from the lowest working position. The highest working position refers to the starting position where the needle tip completely leaves the fabric after completing one stitch cycle and is ready for the next piercing.

[0050] In this embodiment, the needle component 110 can drive the thread to form a loop 111 when it rises from the lowest working position to the thread-cutting working position. The thread-cutting component 120 is located at the thread-cutting working position. The electrostatic field generating unit 130 can be located inside the sewing device and can generate an electrostatic field acting on the loop 111 before the thread-cutting component 120 performs the thread-cutting operation.

[0051] In industrial sewing machine scenarios, the electrostatic field generating unit 130 can be set below the needle plate, near the rotary hook, or inside the machine head in the area where the thread loop 111 forms a trajectory. Its placement needs to be adjusted according to the specific sewing machine model and hooking method. As long as the rising thread loop 111 can be polarized and adsorbed, and guided to open stably towards the scissor hooking side, it is acceptable.

[0052] Based on the above basic structure of this embodiment, as Figure 1 As shown, under the action of the electrostatic field, the needle component 110 rises, causing the formed loop 111 to be polarized and tensioned in the hooking direction of the thread-cutting component 120. This ensures that when the loop 111 is in the thread-cutting working position, it is compatible with the thread-cutting component 120, thus completing the cutting of the loop 111 under tension. Without activating the electrostatic field to constrain the loop 111, as... Figure 2 As shown, the wire loop 111 has an irregular shape and a low compatibility with the wire cutting component 120, which can easily cause the wire to come off or the blade to jam.

[0053] This embodiment achieves non-contact active control of the loop shape by applying a directional electrostatic field during the critical stage of the needle retraction to form the loop. This enables precise positioning and stable forming of the loop, thereby solving the technical problem in related technologies of how to actively and non-contactly control the geometry of the loop during the loop formation stage to fundamentally ensure the hooking reliability of the wire cutting mechanism.

[0054] In some embodiments, the electrostatic field generating unit includes a power supply and an electrode plate. The power supply is connected to the electrode plate and outputs a DC signal to it. The electrode plate is fixed inside the sewing device by an insulating component, located in the hooking direction of the thread-cutting member. The electrode plate converts the high-voltage electricity supplied by the power supply into an electrostatic field with controllable intensity and direction, ensuring that the electrostatic field at least covers the thread-cutting working position. This maintains tension when the thread loop reaches the thread-cutting working position, thus adapting to the cutting direction of the thread-cutting member.

[0055] This embodiment uses the above structure to actively polarize and attract the thread loop in a preset direction using a non-contact electrostatic field. By setting the fixed position of the electrode plate, it can stabilize and tension the thread loop while preventing it from twisting, thus ensuring that the thread cutting component can successfully hook the thread subsequently. This directly solves the problems of thread cutting components not being able to cut the thread or jamming in existing sewing devices.

[0056] In some further embodiments, the strength and duration of the electrostatic field can be adaptively adjusted to ensure that the shape of the wire loop is consistent each time the wire is cut, thereby controlling the length error of the wire end and significantly improving product quality.

[0057] In some further embodiments, the power supply is a DC power module capable of outputting 0 to 10kV high voltage, which serves as the energy source for the electrostatic field, providing a stable and adjustable high voltage to the electrode plates. The electrode plates can be made of conductive metal materials such as copper or aluminum alloy.

[0058] In some further embodiments, the insulating component can be a mounting bracket made of high-strength engineering plastics such as POM, nylon, ceramic, etc. This allows the electrode plate to be precisely fixed in a preset position, ensuring reliable insulation between the electrode plate and the metal body of the sewing machine, preventing high-voltage discharge short circuits, and thus protecting the operator's safety.

[0059] In some further embodiments, the electrode plates are positioned along the needle return path from the lowest working position to the wire-cutting working position, allowing the electrostatic field to cover the needle return path. Based on this electrode plate layout, the generated electrostatic field can fully cover and act on the entire dynamic process of the wire loop from its initial formation and expansion to its final stabilization. This ensures that the electrostatic force begins to guide the wire direction in the early stages of loop formation, preventing twisting; during loop expansion, a directional attractive force is continuously applied to counteract high-speed movement and airflow interference, preventing deviation or collapse; and ultimately, it ensures that the wire loop enters the wire-cutting working position stably in the most ideal posture.

[0060] In other embodiments, the electrode plate may cover only a portion of the path from the middle section of the aforementioned return path to the thread-cutting position. This arrangement provides accurate and concentrated electrostatic constraint on the thread loop during its initial formation and the stages of shaping and hooking. This arrangement is also sufficient to maintain and lock the open shape of the thread loop at the critical moment before thread cutting, preventing deformation during this process. Furthermore, by reducing the size of the electrode plate, the space requirements for installation can be reduced, allowing for integration into a compact sewing machine head.

[0061] In further embodiments, the electrode plate has a high degree of spatial freedom in its layout and can be positioned at any spatial location on the scissor hooking side. Specifically, the installation position of the electrode plate can be flexibly adjusted in space: it can be positioned as far as possible, completely perpendicular to the plane of the scissor's movement, in which case the electrostatic force mainly acts laterally on the loop, effectively correcting the loop's out-of-plane distortion and lateral drift; alternatively, it can be gradually moved closer to and approximately parallel to the hooking direction of the moving scissors, in which case the electrostatic force tends to be consistent with the scissor hooking direction, applying a more direct and efficient axial traction force to the loop. This spatial flexibility allows the device to be adapted for installation according to the demanding spatial structures of different sewing machine models. Regardless of the angle of the electrode plate, as long as the directional electrostatic field it generates can effectively cover the loop and point towards the hooking area, reliable constraint on the loop can be achieved.

[0062] In some embodiments, a processor, or CPU, is also included. This processor is capable of generating a first control signal in response to a needle return trigger signal and a thread-cutting command from the sewing device. Based on the first control signal, the CPU controls the electrostatic field generating unit to generate an electrostatic field acting on the thread loop before the thread-cutting member performs the thread-cutting operation.

[0063] The CPU detects the needle return trigger signal, indicating that the needle component is driving the thread in a return state, at which point a thread loop has been formed or is about to be formed. The CPU detects the thread trimming command, indicating that the sewing device is instructing the thread trimming process to begin. In practical scenarios, the thread trimming command can be provided by the sewing device pedal or other components, intended to indicate the sewing process. When the CPU only detects the above signals / commands, it does not generate the first signal; when the CPU detects the thread trimming command, it enters a waiting state, waiting to detect the needle return trigger signal before generating the first control signal.

[0064] This embodiment, by adding signal processing and control steps, avoids the timing misalignment of the three stages—wire loop formation, electrostatic field generation, and wire cutting operation—effectively preventing wire cutting failures and significantly reducing manual intervention. Based on the above technical means and principles, this embodiment can generate a first control signal for modulating the electrostatic field generating unit through precise signal identification, thereby providing an accurate start time for the electrostatic field generating unit.

[0065] In some further embodiments, a feedback unit and a microcontroller are also included. The feedback unit provides real-time feedback on the current thread parameters and electrostatic field strength. The microcontroller can pre-store sewing patterns. The sewing pattern includes at least a mapping relationship between the thread parameters and the electrostatic field strength. Based on the above design, the microcontroller can generate a second control signal based on the sewing pattern and the current thread parameters, and can also adjust the strength and duration of the electrostatic field based on the second control signal.

[0066] This embodiment introduces a closed-loop feedback mechanism, achieving a shift from fixed-program control to adaptive intelligent control. During operation of the sewing device in this embodiment, the feedback unit identifies the current thread and electrostatic field parameters in real time. It can obtain thread parameters through inference or matching based on preset information. The microcontroller, based on a known sewing pattern mapping relationship, selects an appropriate electrostatic field strength and duration, and then dynamically adjusts the electrostatic field through its generated second control signal. This creates an optimal thread-cutting environment.

[0067] This embodiment ensures that the thread loops receive just the right amount of constraint under different working conditions, thereby effectively improving the stability and success rate of thread cutting and further expanding the adaptability of the sewing device to different sewing materials.

[0068] In some embodiments, the feedback unit includes a high-definition miniature camera and an image processing module for acquiring visual thread parameters. The high-definition miniature camera is mounted near the needle bar, its field of view covering the loop-forming area, and is responsible for capturing real-time images of the loop's shape. The image processing module receives the image data and, through edge detection and feature extraction algorithms, quantitatively analyzes the actual size, opening angle, and spatial stability of the current loop. These visual parameters are fed back to the microcontroller in real-time as thread parameters. The microcontroller compares these parameters with the ideal parameter range stored in the sewing patterns. When it detects that the loop is not fully opened due to thread thickness or tension variations, it generates a corresponding second control signal to dynamically increase the electrostatic field strength, thereby ensuring effective constraint on the loop.

[0069] In other embodiments, the feedback unit includes a high-voltage detection circuit and an analog-to-digital converter module for acquiring electrostatic field parameters. The high-voltage detection circuit is connected in parallel to the high-voltage output circuit of the electrostatic field generating unit, responsible for sampling the actual voltage value on the electrode plates in real time. The analog-to-digital converter module converts this analog voltage signal into a digital signal, accurately representing the instantaneous intensity of the current electrostatic field. This electrostatic field intensity parameter is fed back to the microcontroller in real time, which compares it with the target intensity set according to the sewing mode. If the actual field strength is detected to be lower than the set value due to power fluctuations or load changes, the microcontroller immediately adjusts the output of the high-voltage power supply through a second control signal to ensure that the electrostatic field strength remains stable within the preset range, guaranteeing the stability and consistency of the thread-cutting effect.

[0070] In some further embodiments, a detection unit is also included. The detection unit detects the displacement state of the needle component and generates a needle return trigger signal when the needle component rises from its lowest working position. Through the above design, this embodiment ensures that the electrostatic field intervenes and guides the formation of the loop immediately in its initial stage, which is beneficial for stabilizing the loop shape from the source.

[0071] In some further embodiments, a detection unit is also included. The detection unit detects the displacement state of the needle component and generates a needle return trigger signal after the needle component rises from its lowest working position but before reaching the thread-cutting working position. Through the above design, this embodiment can more accurately match the timing of the electrostatic field application with the moment when the loop expands to its optimal state for hooking, achieving efficient energy utilization and optimal control.

[0072] In some further embodiments, the detection unit is a photoelectric sensor, which is positioned at the lowest working position and can identify the marking position on the needle component to obtain the displacement state. Furthermore, positioning the photoelectric sensor at the lowest working position allows for the generation of the most immediate recovery trigger signal, enabling proactive intervention of the electrostatic field.

[0073] In some further embodiments, the detection unit is a photoelectric sensor, which is positioned anywhere between the lowest working position and the wire-cutting working position, and can identify the marking position on the needle component to obtain the displacement state. Furthermore, placing the photoelectric sensor at a point in the middle of the return path can achieve the aforementioned delayed triggering, precisely matching the optimal state of the loop.

[0074] In some further embodiments, the marker can be set as a reflector, groove or other marking structure that can cooperate with a photoelectric sensor in practical application scenarios to accurately obtain the displacement state of the needle component.

[0075] In some further embodiments, the detection unit is a rotary encoder, which is mounted on the rotating shaft of the driving needle component. It can obtain the displacement state by analyzing the angular displacement of the rotating shaft. Based on this configuration, the needle position can be continuously tracked throughout the entire sewing cycle. This not only generates trigger signals at specific points but also provides continuous trajectory information for the entire control system, laying the foundation for more complex control strategies. Furthermore, because it is mounted on the rotating shaft, it avoids the challenges of wiring and installation within the confined space of the sewing head, exhibiting stronger environmental adaptability and integration convenience.

[0076] In some further embodiments, the detection unit is a miniature camera. This miniature camera is mounted on the sewing machine head and faces the needle movement area. It directly identifies and tracks the needle body using machine vision technology, thereby accurately acquiring its displacement state. This solution eliminates the need for additional physical markers on the needle; image analysis algorithms can determine without contact whether the needle has risen from its lowest point and its specific position, achieving a higher degree of freedom in detection.

[0077] In some further embodiments, the detection unit and the aforementioned feedback unit share the same miniature camera. This camera simultaneously performs dual tasks: displacement state detection and thread loop state monitoring. On the one hand, it tracks the needle position and generates a needle return trigger signal at a preset time; on the other hand, it analyzes the thread loop shape in the same frame in real time, providing visual surface parameters to the feedback unit. Based on the above settings, the integration of the sewing device is improved.

[0078] In some embodiments, such as Figure 3 As shown, the sewing device achieves precise timing control through the collaborative work of the detection unit, the main control unit, the CPU, and the electrostatic field generating unit. Its workflow is as follows: the detection unit monitors the needle position in real time. When it detects the needle starting to rise from its lowest working position, it immediately sends a needle rise trigger signal to the CPU. Upon receiving this trigger signal and the thread-cutting command from the main control unit, the CPU generates a first control signal through logical judgment. This signal ultimately drives the electrostatic field generating unit to start precisely before the thread-cutting operation, generating a directional electrostatic field. This signal transmission mechanism ensures strict synchronization between the application of the electrostatic field and the formation of the thread loop, eliminating ineffective intervention or energy waste from a timing logic perspective, and providing a fundamental guarantee for the stability of thread cutting.

[0079] In some embodiments, such as Figure 4 As shown, the sewing device incorporates a feedback unit and a microcontroller to coordinate with the electrostatic field generating unit. The feedback unit continuously collects the electrostatic field strength and thread parameters and sends them to the microcontroller; the microcontroller analyzes and processes the pre-stored sewing pattern and real-time data to generate a second control signal to dynamically adjust the electrostatic field.

[0080] In some other embodiments, the foregoing embodiments can be combined to achieve coordinated control of the electrostatic field generating unit based on the detection unit, sewing device main controller, CPU, feedback unit and microcontroller. In this embodiment, the CPU, feedback unit and microcontroller can be integrated into the same control unit.

[0081] In some embodiments, the thread-cutting component includes movable and fixed shears; the movable and fixed shears cooperate to perform a thread-cutting operation on the tensioned thread loop. Based on the foregoing embodiments, it should be noted that in this embodiment, the spatial orientation of the electrode plate, thread loop, and shears is as follows: the fixed shears are typically fixedly installed below the needle plate or inside the machine head, forming a reference point for cutting; while the movable shears are driven to perform hooking and cutting actions, with their hooking direction pointing towards the area where the thread loop is formed.

[0082] The electrode plate is positioned on the side of the loop away from the scissors, i.e., on the side opposite to the hooking direction of the moving scissors. Specifically, when the needle rises to form the loop, the loop itself is situated in the space between the moving scissors and the electrode plate. The directional electrostatic field generated by the electrode plate is configured to point from the electrode plate towards the hooking path of the moving scissors, thereby effectively attracting and guiding the loop in the electrostatic field toward the moving scissors side, thus ensuring a good fit between the tensioned loop and the wire-cutting component.

[0083] The terms "module," "unit," "subunit," etc., used above can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the above embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0084] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0085] This embodiment provides a thread-cutting control method for a sewing device, which can be applied to the sewing device described in any of the foregoing embodiments. Figure 5 This is a flowchart of the thread-cutting control method of the sewing device in this embodiment, as shown below. Figure 5 As shown, the process includes the following steps:

[0086] In step S510, when the needle component drives the thread to rise from the lowest working position to the cutting position, an electrostatic field is generated that acts on the loop formed by the thread, causing the loop to polarize.

[0087] This step actively intervenes in the loop formation process through non-contact electrostatic force, which can guide the distribution of surface line charge from the source, laying the physical foundation for subsequent directional adsorption and morphology control.

[0088] In step S520, the electrostatic field generating unit adsorbs the polarized wire loop, causing the wire loop to be tensioned in the hooking direction of the wire cutting component, so that the wire loop is adapted to the wire cutting component when it is in the wire cutting working position.

[0089] This step utilizes the Coulomb force generated by the directional electrostatic field on the polarized loop to stably guide and tension the easily disturbed, potentially twisted or misaligned loop onto the hooking path of the moving scissors.

[0090] Step S530: Use a wire-cutting component to perform a wire-cutting operation on the tensioned wire loop.

[0091] This step is performed under the condition that the wire loop has been stably constrained in an ideal position by the electrostatic field. This ensures that the moving and stationary shears can reliably hook and complete the cut each time, thereby effectively preventing failures such as incomplete cutting, blade jamming, and excessively long wire ends caused by poor wire loop shape.

[0092] Based on the above steps and the combined technical effects achieved by all steps, this embodiment can effectively control the aforementioned sewing device to perform accurate thread cutting operations, thereby solving the technical problem in related technologies of how to actively and non-contactly control the geometry of the thread loop during the formation stage to fundamentally ensure the thread hooking reliability of the thread cutting mechanism.

[0093] This embodiment also provides a computer device, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0094] Optionally, the aforementioned computer device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor. Furthermore, in conjunction with the thread-cutting control method for the sewing device provided in the above embodiments, this embodiment may also provide a storage medium for implementation. The storage medium stores a computer program; when executed by the processor, the computer program implements any of the thread-cutting control methods for the sewing device in the above embodiments.

[0095] It should be noted that all information and data involved in this application are authorized by the user or fully authorized by all parties and will be used legally.

[0096] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0097] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0098] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0099] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of patent protection. 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.

Claims

1. A sewing device, characterized in that, include: The needle component is used to drive the thread to form a loop when it rises from the lowest working position to the thread cutting position; A wire-cutting component is provided at the wire-cutting work station; An electrostatic field generating unit is used to generate an electrostatic field acting on the wire loop before the wire cutting component performs the wire cutting operation; Under the action of the electrostatic field, the wire loop is polarized and tensioned in the hooking direction of the wire-cutting member, so that the wire loop is adapted to the wire-cutting member when it is in the wire-cutting working position.

2. The sewing device according to claim 1, characterized in that, The electrostatic field generating unit includes a power supply and electrode plates; The power supply is connected to the electrode plate and is used to output a DC signal to the electrode plate; The electrode plate is fixed inside the sewing device by an insulating component and is located in the hooking direction of the thread cutting component; The electrode plate is used to generate the electrostatic field and to ensure that the electrostatic field at least covers the wire-cutting work position.

3. The sewing device according to claim 2, characterized in that, The electrode plate is arranged along the needle return path between the lowest working position and the wire cutting working position, so that the electrostatic field covers the needle return path.

4. The sewing device according to any one of claims 1 to 3, characterized in that, It also includes the processor; The processor is configured to generate a first control signal in response to a needle return trigger signal and a thread-cutting command from the sewing device; the processor is also configured to control the electrostatic field generating unit based on the first control signal, so that it generates an electrostatic field acting on the thread loop before the thread-cutting member performs the thread-cutting operation.

5. The sewing device according to claim 4, characterized in that, Also includes: The feedback unit is used to provide real-time feedback on the current surface parameters and electrostatic field strength. Microcontroller, pre-stored with sewing patterns; The sewing pattern includes at least the mapping relationship between the thread parameters and the electrostatic field strength; The microcontroller is used to generate a second control signal based on the sewing pattern and the current thread parameters; the microcontroller is also used to adjust the intensity and duration of the electrostatic field based on the second control signal.

6. The sewing device according to claim 4, characterized in that, It also includes a detection unit for detecting the displacement state of the needle component; The detection unit is used to generate a needle return trigger signal when the needle component returns from the lowest working position; Alternatively, the detection unit may be used to generate a needle return trigger signal after the needle component has returned from the lowest working position and before it reaches the thread cutting working position.

7. The sewing device according to claim 6, characterized in that, The detection unit is a photoelectric sensor; The photoelectric sensor is disposed at the lowest working position or at any position between the lowest working position and the wire cutting working position; The photoelectric sensor is used to identify the mark on the needle component to obtain the displacement state.

8. The sewing device according to claim 6, characterized in that, The detection unit is a rotary encoder; The rotary encoder is mounted on the rotating shaft that drives the needle component; The rotary encoder is used to obtain the displacement state by analyzing the angular displacement of the rotating shaft.

9. The sewing device according to claim 1, characterized in that, The wire-cutting component includes a movable shear and a fixed shear; the movable and fixed shears are used to cooperate with each other to perform a wire-cutting operation on the tensioned wire loop.

10. A thread-cutting control method for a sewing device, applied to the sewing device according to any one of claims 1 to 9, characterized in that, include: When the needle component drives the thread to rise from the lowest working position to the cutting position, an electrostatic field is generated on the loop formed by the thread, causing the loop to polarize. The electrostatic field generating unit adsorbs and polarizes the wire loop, causing the wire loop to be tensioned in the hooking direction of the wire cutting component, so that the wire loop is adapted to the wire cutting component when it is in the wire cutting working position; The wire-cutting component is used to perform a wire-cutting operation on the tensioned wire loop.

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