Sewing machine needle seat capable of adjusting thread tension

Abstract

The invention relates to a sewing machine needle seat capable of adjusting thread tension, which is applied in the field of textile technology. The needle seat comprises a controller, a base, a needle fixing seat, a needle, a drum, a permanent magnet, a driving coil, upper and lower resistance adjusting tubes, a damping adjusting block, a damping adjusting ring and a needle locking tube. The needle seat realizes accurate control and real-time monitoring of thread tension by combining electromagnetic adjustment, mechanical resistance adjustment and an intelligent control system. The cooperation of the driving coil and the permanent magnet can control the rotation resistance of the drum and monitor the thread speed and tension. The damping adjusting block in the upper and lower resistance adjusting tubes realizes fine adjustment of the thread movement resistance by means of an electrostrictive material. The damping adjusting ring is used for fine-tuning or locking the drum. The needle locking tube facilitates rapid replacement of the needle. The controller adjusts the states of various components in real time according to feedback information of an encoder and a driving coil to maintain optimal thread tension, and also has the capabilities of thread break detection and rapid response.

Description

Technical Field

[0001] The invention relates to a sewing machine needle seat capable of adjusting thread tension, in particular to a sewing machine needle seat capable of adjusting thread tension applied in the field of textile technology. Background Art

[0002] With the rapid development of the textile industry, the requirements for the precision and efficiency of sewing machines are getting higher and higher. Precise control of thread tension is one of the key factors affecting sewing quality. In the prior art, the thread tension adjustment of the sewing machine needle seat mostly relies on mechanical structure, which is difficult to achieve real-time and accurate adjustment. Especially when processing fabrics of different materials and thicknesses, manual adjustment is often required, which affects production efficiency.

[0003] Chinese invention patent CN1869308B discloses a needle holder for a buttonhole sewing machine, the main innovation of which is to adjust the height of the orifice plate relative to the needle plate through a height adjustment mechanism. Although the invention improves the convenience of adjustment, it does not solve the problem of accurate control of the thread tension.

[0004] Chinese invention patent CN108035080B proposes a sewing machine cylinder needle seat, which realizes the adjustment of the needle seat lifting height through a pneumatic structure, and is suitable for the processing of thickened products. However, this design mainly focuses on the height adjustment of the needle seat, and there is still a lack of effective solutions for the dynamic adjustment of the thread tension.

[0005] Although the above design has some innovations in the needle seat structure and height adjustment, it still has certain limitations, such as the lack of real-time and precise control of the thread tension. It is difficult to achieve dynamic adjustment of the thread tension during high-speed sewing. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to achieve real-time and precise control of thread tension on the needle seat of a sewing machine, and to achieve dynamic adjustment of thread tension during high-speed sewing.

[0007] In order to solve the above problems, the present invention provides a sewing machine needle seat with adjustable thread tension, including a controller and a plurality of needle seats arranged in a straight line, the top ends of the plurality of needle seats are fixedly connected to the same main needle seat, the needle seat includes a base, the bottom end of the base is clamped with a needle fixing seat, the bottom end of the needle fixing seat is clamped with a needle, the outer end of the needle fixing seat is rotatably connected to a roller, the inner wall of the roller is fixedly connected to a plurality of permanent magnets, a driving coil is fixedly connected between the outer end of the needle fixing seat and the inner wall of the permanent magnet, a pin is clamped on the base at a position corresponding to the top end of the needle fixing seat, and the roller is clamped with a pin. A silk thread is wrapped around the outer end of the cylinder, one end of the pin is fixedly connected to an upper resistance adjusting tube, the outer end of the needle fixing seat close to one end of the needle is fixedly connected to a lower resistance adjusting tube, the top end of the silk thread is connected to the wire supply system, and the silk thread passes downward through the upper resistance adjusting tube and extends to the lower side of the upper resistance adjusting tube, the bottom end of the silk thread passes through the lower resistance adjusting tube and extends to the lower side of the lower resistance adjusting tube, and the extended part passes through the threading hole on the needle tip, the driving coil, the upper resistance adjusting tube and the lower resistance adjusting tube are all electrically connected to the controller, and an encoder is provided between the needle fixing seat and the drum.

[0008] As a further improvement of the present application, a needle locking tube is fixedly connected between the needle fixing seat and the needle, the needle locking tube is electrically connected to the controller, the needle locking tube is made of electrostrictive material, and a positioning surface is provided on the part of the needle located between the needle locking tube.

[0009] As a further improvement of the present application, a damping adjustment ring is fixedly connected to the position corresponding to the outer end of the needle fixing seat and the bottom end of the roller, the damping adjustment ring is electrically connected to the controller, the inner diameter of the damping adjustment ring is equal to the inner diameter of the roller, the damping adjustment ring is made of electrostrictive material, and the telescopic direction of the damping adjustment ring is parallel to the axial direction of the needle fixing seat.

[0010] As a further improvement of the present application, the top end of the needle fixing seat is connected to the base through a positioning column, the positioning column is a hexagonal pyramid structure, and the cross-section of the positioning column near one end of the base is smaller than the cross-section near one end of the needle fixing seat, and a hexagonal pyramid hole matching the outer end of the positioning column is provided at the corresponding positions of the base and the positioning column.

[0011] As another improvement of the present application, the base and the positioning column and the corresponding positions of the pin are provided with through holes that cooperate with the pin. The pin is a hexagonal pyramid structure, and the smaller end of the pin is arranged away from the upper resistance adjustment tube. The smaller end of the pin passes through the positioning column and the base and extends to the outside of the base, and the extended part is threadedly connected with a fixing nut.

[0012] As another improved supplement of the present application, the inner walls of the upper resistance adjustment tube and the lower resistance adjustment tube are fixedly connected with multiple damping adjustment blocks, the multiple damping adjustment blocks are all made of electrostrictive material, and the multiple damping adjustment blocks are distributed in a circular array around the axis of the lower resistance adjustment tube.

[0013] As another improvement supplement of the present application, the needle fixing seat is made of non-magnetic material, and the corresponding position of the bottom end of the needle fixing seat and the lower resistance adjustment tube is a conical structure, and the end with a smaller diameter of the conical structure is facing the direction close to the bottom end of the needle, and the angle between the axis of the lower resistance adjustment tube and the axis of the needle fixing seat is equal to the taper angle of the bottom end of the needle fixing seat.

[0014] As another improvement of the present application, bosses are provided at the top and bottom ends of the drum, multiple permanent magnets are distributed in a circular array around the axis of the drum, a certain gap is reserved between two adjacent damping adjustment blocks, and the ends of the multiple damping adjustment blocks that are close to each other are provided with chamfered corners, and the extension and retraction directions of the multiple damping adjustment blocks are all radial directions of the upper resistance adjustment tube or the lower resistance adjustment tube.

[0015] A method for using a sewing machine needle seat capable of adjusting thread tension comprises the following steps:

[0016] S1. The controller adjusts the current of the driving coil, controls the rotation resistance of the drum, and monitors the speed and tension of the silk thread;

[0017] S2. The controller determines the running state of the thread according to the induced current of the driving coil, including detecting whether the thread is broken;

[0018] S3. The controller adjusts the current of the damping adjustment block in the upper resistance adjustment tube and the lower resistance adjustment tube to expand the volume of the damping adjustment block to squeeze the wire and adjust the movement resistance of the wire. When the wire breaks, the damping adjustment block can quickly lock the wire.

[0019] S4. The controller adjusts the current of the damping adjustment ring as needed to fine-tune or lock the rotation of the drum;

[0020] S5. The controller adjusts the working state of each component in real time according to the feedback information of the encoder and the drive coil to maintain the optimal wire tension;

[0021] S6. When the needle needs to be replaced, the controller sends a signal to loosen the needle locking tube, and re-locks it after the replacement is completed.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. Precise control of thread tension: Through the electromagnetic interaction between the drive coil and the permanent magnet, combined with the design of the roller, precise control of thread tension is achieved. This electromagnetic adjustment mechanism can respond quickly, adapt to different sewing speeds and fabric requirements, and ensure the stability of thread tension during sewing.

[0024] 2. Real-time monitoring of thread status: The drive coil is not only used for control, but also for real-time monitoring of thread speed and tension through induction current. This monitoring mechanism enables the system to detect and respond to changes in thread status in a timely manner, improving the reliability of the sewing process.

[0025] 3. Multi-level resistance adjustment: The damping adjustment blocks in the upper and lower resistance adjustment tubes are made of electrostrictive materials, which can accurately control the movement resistance of the silk thread. This design allows for differentiated adjustment at different positions of the silk thread movement path to meet the needs of complex sewing processes.

[0026] 4. Intelligent control: The controller combines the feedback information of the encoder and the drive coil to realize intelligent control of the entire system. This not only improves the accuracy of regulation, but also enables the system to have adaptive learning capabilities and continuously optimize the control strategy.

[0027] 5. Quick response to abnormal situations; the system has a wire break detection function. Once a break occurs, it can respond in a short time and quickly lock the roller and damping adjustment block to minimize losses and downtime.

[0028] 6. Convenient needle management: The design of the needle locking tube makes needle replacement simple and quick. This not only improves maintenance efficiency, but also reduces the time the operator contacts dangerous parts, improving safety.

[0029] 7. Strong adaptability: Through the coordinated work of multiple adjustment mechanisms, the needle holder can quickly adapt to different types of fabrics and sewing modes, expanding the application range of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the overall structure diagram of the needle seat of this application;

[0031] Figure 2 A front view of the needle holder of the present application;

[0032] Figure 3 For this application Figure 2 Middle AA section view;

[0033] Figure 4 For this application Figure 3 Middle BB section view;

[0034] Figure 5 For this application Figure 4 Middle CC section view;

[0035] Figure 6 For this application Figure 4 Middle DD section view;

[0036] Figure 7 This is a structural diagram of the upper resistance adjustment tube of the present application;

[0037] Figure 8 Needle holder explosion for this application Figure 1 ;

[0038] Fig. 9 Needle holder explosion for this application Figure 2 ;

[0039] Fig.10 The appearance structure of the needle seat of this application Figure 1 ;

[0040] Fig.11 The appearance structure of the needle seat of this application Figure 2 ;

[0041] Fig.12 This is the overall appearance structure diagram of this application.

[0042] Description of the numbers in the figure:

[0043] 1. Base; 2. Needle fixing seat; 3. Needle; 4. Roller; 5. Permanent magnet; 6. Driving coil; 7. Pin; 8. Silk thread; 9. Upper resistance adjustment tube; 10. Lower resistance adjustment tube; 11. Needle locking tube; 12. Damping adjustment ring; 13. Positioning column; 14. Fixing nut; 15. Damping adjustment block; 16. Main needle seat. DETAILED DESCRIPTION

[0044] Four implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0045] Embodiment 1:

[0046] Figure 1-Figure 12 As shown, this embodiment provides a sewing machine needle seat capable of adjusting thread tension, the needle seat comprising a controller and a plurality of needle seats arranged in a straight line. The top ends of the plurality of needle seats are fixedly connected to the same main needle seat 16 to form an integral structure.

[0047] Each needle seat is mainly composed of the following parts: the base 1 serves as the supporting structure of the entire needle seat. The bottom end of the base 1 is clamped with a needle fixing seat 2 to ensure that the needle fixing seat 2 is firmly installed.

[0048] The needle holder 2 is made of non-magnetic material to avoid interfering with the operation of the electromagnetic system. The bottom end of the needle holder 2 is clamped with a needle 3 for actual sewing operations. The bottom end of the needle holder 2 and the corresponding position of the lower resistance adjustment tube 10 are designed as a conical structure, wherein the end with a smaller diameter of the conical structure faces the direction of the bottom end of the needle 3. This design is conducive to the smooth passage of the thread.

[0049] The drum 4 is rotatably connected to the outer end of the needle fixing seat 2. The top and bottom ends of the drum 4 are both provided with bosses, and this design helps to prevent the thread from falling off. The inner wall of the drum 4 is fixedly connected with a plurality of permanent magnets 5, which are distributed in a circumferential array around the axis of the drum 4.

[0050] The driving coil 6 is fixedly connected between the outer end of the needle fixing seat 2 and the inner wall of the permanent magnet 5. The driving coil 6 is electrically connected to the controller, and the rotation resistance of the roller 4 can be adjusted by controlling the current.

[0051] The plug 7 is clamped on the base 1 and corresponds to the top of the needle fixing seat 2. One end of the plug 7 is fixedly connected to the upper resistance adjustment tube 9. The top of the silk thread 8 is connected to the wire supply system, and the silk thread 8 passes through the upper resistance adjustment tube 9 downward and extends to the lower side of the upper resistance adjustment tube 9.

[0052] The upper resistance adjusting tube 9 and the lower resistance adjusting tube 10, the bottom end of the thread 8 passes through the lower resistance adjusting tube 10 and extends to the lower side thereof, and the extended part passes through the threading hole on the needle tip of the needle 3. Both adjusting tubes are electrically connected to the controller and are used to adjust the movement resistance of the thread 8. It is worth noting that the angle between the axis of the lower resistance adjusting tube 10 and the axis of the needle fixing seat 2 is equal to the taper angle of the bottom end of the needle fixing seat 2, and this design ensures the smooth passage of the thread 8.

[0053] The wire 8 is wound around the outer end of the drum 4, and the tension is precisely controlled through the above structure.

[0054] The encoder is arranged between the needle fixing seat 2 and the roller 4 for accurately monitoring the rotation state of the roller 4 .

[0055] Through the cooperation of the driving coil 6 and the permanent magnet 5 , the rotation resistance of the drum 4 can be accurately controlled, thereby adjusting the tension of the wire 8 .

[0056] The design of the upper resistance adjustment tube 9 and the lower resistance adjustment tube 10 provides additional wire resistance adjustment capability, making tension control more precise.

[0057] The conical structure design of the needle fixing seat 2 , combined with the angle setting of the lower resistance adjustment tube 10 , ensures the smooth passage of the silk thread 8 and reduces the wear of the silk thread 8 .

[0058] The boss design at the top and bottom of the roller 4 effectively prevents the silk thread 8 from falling off during high-speed operation.

[0059] The setting of the encoder enables the system to monitor the rotation state of the drum 4 in real time and provide accurate feedback information for the control system.

[0060] The sewing machine needle seat provided in this embodiment can achieve precise adjustment of thread tension, adapt to different sewing needs, and improve sewing quality and efficiency.

[0061] Embodiment 2:

[0062] Figure 1-Figure 12It is shown that, based on Example 1, this embodiment describes in detail the connection method between the needle holder 2 and the base 1 in the sewing machine needle holder with adjustable thread tension, as well as the structure and fixing method of the latch 7. These designs ensure the stability and reliability of the needle holder, and are also convenient for assembly and maintenance.

[0063] The needle holder 2 is connected to the base 1, and the top of the needle holder 2 is connected to the base 1 through the positioning column 13. The positioning column 13 adopts a hexagonal pyramid structure design, which provides a larger contact area and enhances the stability of the connection. The hexagonal structure prevents rotation and ensures that the direction of the needle holder 2 is always correct. The conical design facilitates installation and disassembly.

[0064] The cross section of the positioning column 13 near the base 1 is smaller than the cross section near the needle fixing seat 2. This design makes the positioning column 13 easier to insert and more stable when subjected to force, and not easy to fall off.

[0065] A hexagonal pyramid hole matching the outer end of the positioning column 13 is provided at a position on the base 1 corresponding to the positioning column 13. The shape of the hexagonal pyramid hole completely matches that of the positioning column 13, ensuring the accuracy and stability of the connection.

[0066] The latch 7 also adopts a hexagonal pyramid structure design to ensure the consistency and stability of the overall structure.

[0067] The smaller end of the latch pin 7 is arranged away from the upper resistance regulating tube 9. This design makes it easier for the latch pin 7 to be inserted and is not easy to loosen under working state.

[0068] The smaller end of the latch 7 passes through the positioning column 13 and the base 1 in sequence, and extends to the outside of the base 1. This design ensures that the latch 7 can firmly fix the entire structure.

[0069] The base 1 and the positioning column 13 are both provided with through holes matching with the latch pin 7 at positions corresponding to the latch pin 7. The precise alignment of these through holes ensures the smooth installation of the latch pin 7.

[0070] The portion of the latch pin 7 extending to the outside of the base 1 is threadedly connected with a fixing nut 14. This design provides a reliable fixing method and is also convenient for disassembly and maintenance.

[0071] The through holes on the base 1 and the positioning column 13 need to be precisely aligned to ensure that the latch 7 can pass smoothly. The size of the through hole should be slightly larger than the diameter of the latch 7 to facilitate insertion, but not too large to avoid affecting the fixing effect.

[0072] The hexagonal pyramid structure provides extremely high stability and prevents any rotation or shaking during use. The conical design makes assembly and disassembly simple, while the use of the fixing nut 14 makes adjustment and maintenance convenient. The hexagonal structure ensures the precise positioning of the needle holder 2 during installation, which is essential for the precise operation of the sewing machine. The combination of the latch 7 and the fixing nut 14 provides a reliable fixing method that can remain stable even under high-speed operation and frequent use. Both the positioning column 13 and the latch 7 adopt a hexagonal pyramid structure, which maintains the consistency of the design and is conducive to the coordination and stability of the overall structure.

[0073] The sewing machine needle seat of this embodiment can ensure stability and accuracy while taking into account the convenience of assembly and maintenance, thereby providing a solid foundation for the reliable operation of the entire device.

[0074] Embodiment 3:

[0075] Figure 1-Figure 12 It is shown that, based on Example 1 and Example 2, this embodiment describes in detail various adjustment mechanisms in the sewing machine needle seat capable of adjusting the thread tension, including a needle locking mechanism, a drum damping adjustment mechanism, and a thread resistance adjustment mechanism. These mechanisms together constitute a fine adjustment system of the device, so that the sewing machine can adapt to different sewing needs and improve the sewing quality.

[0076] The needle locking mechanism, the needle locking tube 11 is fixedly connected between the needle fixing seat 2 and the needle 3. This component has the following characteristics: the needle locking tube 11 is made of electrostrictive material. It can change its shape under the action of electric current, so as to realize the function of locking or releasing the needle 3. The needle locking tube 11 is electrically connected to the controller, and its state can be accurately controlled by the controller. The part of the needle 3 located between the needle locking tube 11 is provided with a positioning surface. The positioning surface ensures the correct position and direction of the needle 3 in the locked state.

[0077] When the needle 3 needs to be replaced, the controller sends a signal to shrink the needle locking tube 11, thereby releasing the needle 3. After the replacement is completed, the needle locking tube 11 is powered on again to expand and firmly lock the new needle 3.

[0078] The damping adjustment mechanism of the drum, the damping adjustment ring 12 is fixedly connected to the position corresponding to the outer end of the needle fixing seat 2 and the bottom end of the drum 4. This component has the following characteristics: the damping adjustment ring 12 is also made of electrostrictive material, the inner diameter of the damping adjustment ring 12 is equal to the inner diameter of the drum 4, ensuring a good fit, the expansion and contraction direction of the damping adjustment ring 12 is parallel to the axial direction of the needle fixing seat 2, and the damping adjustment ring 12 is electrically connected to the controller, and its state can be accurately controlled. By controlling the expansion and contraction of the damping adjustment ring 12, its contact pressure with the drum 4 can be adjusted, thereby finely adjusting the rotation resistance of the drum 4, thereby affecting the tension of the silk thread 8.

[0079] The wire resistance adjustment mechanism, the inner walls of the upper resistance adjustment tube 9 and the lower resistance adjustment tube 10 are fixedly connected with a plurality of damping adjustment blocks 15. These damping adjustment blocks 15 have the following characteristics: all damping adjustment blocks 15 are made of electrostrictive materials, and a plurality of damping adjustment blocks 15 are distributed in a circular array around the axis of the lower resistance adjustment tube 10, and a certain gap is reserved between two adjacent damping adjustment blocks 15. This design allows the damping adjustment blocks 15 to have enough space when they are extended and retracted to avoid mutual interference, and a plurality of damping adjustment blocks 15 are provided with rounded corners at one end close to each other. The wear on the wire 8 can be reduced, and the wire 8 can pass more smoothly. The extension and retraction directions of the plurality of damping adjustment blocks 15 are all radial directions of the upper resistance adjustment tube 9 or the lower resistance adjustment tube 10. By controlling the extension and retraction of the damping adjustment blocks 15, their contact pressure with the wire 8 can be adjusted, thereby accurately controlling the resistance of the wire 8 when it passes.

[0080] The above three adjustment mechanisms work together. When the needle 3 is replaced, the controller sends a signal to shrink the needle locking tube 11 to release the old needle 3. After the replacement is completed, the needle locking tube 11 is powered on again to expand and lock the new needle 3.

[0081] During the sewing process, the controller adjusts the state of the damping adjustment ring 12 as needed, finely controls the rotational resistance of the drum 4 , and affects the overall tension of the thread 8 .

[0082] At the same time, the controller will also adjust the damping adjustment blocks 15 in the upper resistance adjustment tube 9 and the lower resistance adjustment tube 10 according to specific needs, and accurately control the movement resistance of the wire 8 at different positions by changing their extension and contraction degrees.

[0083] The coordinated work of these three mechanisms enables the sewing machine to achieve precise dynamic adjustment of the thread tension at different sewing stages and under different material requirements.

[0084] The multi-level and multi-directional adjustment mechanism design enables the sewing machine needle seat of this embodiment to adapt to various complex sewing needs, greatly improving the accuracy and flexibility of sewing, and also extending the service life of the equipment and silk thread.

[0085] Example 4

[0086] Figure 1-Figure 12 It is shown that, based on embodiments 1, 2 and 3, this embodiment describes in detail the complete working process of the sewing machine needle seat with adjustable thread tension. This process achieves precise control, real-time monitoring and rapid response of the thread tension 8 through multiple mechanisms and intelligent algorithms, greatly improving the quality, efficiency and safety of sewing.

[0087] Initial setup, system configuration, multiple needle seats are arranged in a straight line, and the top ends are connected to the same main needle seat 16. The controller is initialized and the preset parameters and sewing mode are loaded.

[0088] The silk thread 8 is installed, and the operator leads the silk thread 8 from the wire supply system. The silk thread 8 passes through the latch 7, the upper resistance adjustment tube 9, and the lower resistance adjustment tube 10 in sequence. Finally, the silk thread 8 passes through the threading hole of the needle 3.

[0089] The thread 8 is positioned, and the operator winds the thread 8 around the outer end of the drum 4 to ensure uniform winding. The controller fine-tunes the drum 4 through the damping adjustment ring 12 to keep the thread 8 at an appropriate initial tension.

[0090] During the electromagnetic regulation process, the rotation resistance of the drum 4 is controlled. The controller calculates the required tension of the thread 8 according to the current sewing mode. The controller accurately adjusts the current intensity and direction of the drive coil 6. The generated magnetic field interacts with the permanent magnet 5 on the inner wall of the drum 4 to control the rotation resistance of the drum 4 in real time.

[0091] The speed and tension of the thread 8 are monitored. The thread 8 drives the roller 4 and the permanent magnet 5 to rotate. The permanent magnet 5 generates an induced current in the drive coil 6. The controller collects the induced current data through a high-speed sampling circuit. The frequency, intensity and waveform of the induced current are analyzed using a complex algorithm to accurately determine the speed and tension of the thread 8.

[0092] The controller actively drives the thread 8 to move, and calculates the required thread feeding speed according to the sewing speed requirement. The roller 4 is actively driven to rotate by accurately controlling the current waveform of the driving coil 6. The driving torque is adjusted in real time to ensure that the thread 8 feeding speed is synchronized with the sewing speed.

[0093] Wire 8 breakage detection, the encoder and the drive coil 6 continuously monitor the rotation state of the drum 4. The controller analyzes the rotation speed, acceleration and rotation resistance changes of the drum 4 in real time. If an abnormality is detected (such as a sudden change in speed or disappearance of resistance), it is immediately determined that the wire 8 may be broken.

[0094] During the resistance adjustment process, the upper resistance adjustment tube 9 is adjusted, and the controller calculates the required upper resistance according to the real-time state of the wire 8. The current of the multiple damping adjustment blocks 15 in the upper resistance adjustment tube 9 is accurately adjusted. The damping adjustment blocks 15 produce different degrees of volume expansion according to the current intensity. The expanded damping adjustment blocks 15 accurately squeeze the wire 8 to achieve fine resistance adjustment.

[0095] The lower resistance adjustment tube 10 is adjusted, and the controller simultaneously calculates the required lower resistance, taking into account the tension requirement near the needle 3. The current of the damping adjustment block 15 in the lower resistance adjustment tube 10 is adjusted. The lower damping adjustment block 15 expands, applying precise pressure to the thread 8.

[0096] In the coordinated adjustment, the controller comprehensively considers the status of the upper resistance adjustment tube 9, the lower resistance adjustment tube 10 and the electromagnetic adjustment effect. Through a complex algorithm model, multi-point coordinated adjustment is achieved. According to the needs of different sewing stages, the parameters of each adjustment point are dynamically adjusted.

[0097] The roller 4 is fine-tuned and locked, and the rotation resistance of the roller 4 is fine-tuned. The controller calculates the fine resistance adjustment required by the roller 4 in real time. The current of the damping adjustment ring 12 is accurately controlled to achieve nano-level expansion and contraction. The contact pressure between the damping adjustment ring 12 and the roller 4 is changed to achieve ultra-fine resistance adjustment.

[0098] The cylinder 4 is locked. When the operation needs to be suspended or maintenance is performed, the controller sends a locking command. The damping adjustment ring 12 receives high-intensity current and expands rapidly. The damping adjustment ring 12 fits tightly with the cylinder 4, generating a great friction force, and the cylinder 4 is completely locked.

[0099] Needle 3 management: During normal operation, the controller continuously monitors the state of the needle locking tube 11. Maintains an appropriate current to ensure that the needle locking tube 11 stably fixes the needle 3. During the needle 3 replacement process, the controller receives a request to replace the needle 3. Quickly cuts off the current of the needle locking tube 11 to shrink it quickly. The system prompts the operator to replace the needle 3. After the operator completes the replacement, the controller is powered on again. The needle locking tube 11 returns to its expanded state and firmly locks the new needle 3.

[0100] Feedback and control loop, high-precision encoder continuously monitors the rotation state of the drum 4, including speed, angle and acceleration. The drive coil 6 provides information on the speed, tension and possible breakage of the wire 8 through the induced current. The controller uses a high-speed processor to process all sensor data in real time. A complex AI algorithm is used to predict the changing trend of the state of the wire 8. Based on the prediction results, the controller actively adjusts the current waveform and intensity of the drive coil 6, the state of each damping adjustment block 15 in the upper resistance adjustment tube 9 and the lower resistance adjustment tube 10, and the pressure of the damping adjustment ring 12. The system continuously performs this dynamic adjustment at a higher frequency (such as 1000Hz) to ensure the optimal state of the tension of the wire 8.

[0101] Abnormal situation handling: When the wire 8 breaks, the drive coil 6 detects the abnormality and notifies the controller within microseconds. The controller immediately executes the emergency procedure, instantly locks the drum 4, quickly expands all damping adjustment blocks 15, locks the remaining wire 8, triggers the sound and light alarm, and notifies the operator.

[0102] Needle 3 is damaged. The system detects that needle 3 is damaged through sewing quality monitoring or operator input. The controller activates the safety mode and suspends the sewing operation. The control system guides the operator to perform the needle 3 replacement process. After the replacement is completed, the system automatically performs needle 3 position calibration and function test.

[0103] Adaptive learning and optimization, the system continuously records the parameters and results of each sewing operation. Using machine learning algorithms, historical data is analyzed to optimize control parameters. The best control strategy is automatically adjusted for different types of fabrics and sewing modes.

[0104] This embodiment demonstrates how the device can achieve precise control and real-time monitoring of the tension of the thread 8 through advanced electromagnetic regulation, precise mechanical resistance regulation and intelligent control system, combined with artificial intelligence and adaptive learning capabilities. This multi-level and multi-dimensional regulation mechanism enables the device to adapt to various complex sewing needs, quickly respond to abnormal situations, and continuously optimize itself, thereby improving the quality, efficiency and safety of sewing.

[0105] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A sewing machine needle holder capable of adjusting thread tension, characterized in that: The invention comprises a controller and a plurality of needle seats arranged in a straight line, wherein the top ends of the plurality of needle seats are fixedly connected to a same main needle seat (16), the needle seat comprises a base (1), a needle fixing seat (2) is clamped at the bottom end of the base (1), a needle (3) is clamped at the bottom end of the needle fixing seat (2), a roller (4) is rotatably connected to the outer end of the needle fixing seat (2), a plurality of permanent magnets (5) are fixedly connected to the inner wall of the roller (4), a driving coil (6) is fixedly connected between the outer end of the needle fixing seat (2) and the inner wall of the permanent magnet (5), a latch (7) is clamped at a position on the base (1) corresponding to the top end of the needle fixing seat (2), a silk thread (8) is wound around the outer end of the roller (4), and the latch (7) one end is fixedly connected to an upper resistance adjustment tube (9), the outer end of the needle fixing seat (2) close to one end of the needle (3) is fixedly connected to a lower resistance adjustment tube (10), the top end of the silk thread (8) is connected to a wire supply system, and the silk thread (8) passes downward through the upper resistance adjustment tube (9) and extends to the lower side of the upper resistance adjustment tube (9), the bottom end of the silk thread (8) passes through the lower resistance adjustment tube (10) and extends to the lower side of the lower resistance adjustment tube (10), and the extended part passes through the threading hole on the needle tip of the needle (3), the driving coil (6), the upper resistance adjustment tube (9) and the lower resistance adjustment tube (10) are all electrically connected to the controller, and an encoder is provided between the needle fixing seat (2) and the roller (4); A needle locking tube (11) is fixedly connected between the needle fixing seat (2) and the needle (3), the needle locking tube (11) is electrically connected to the controller, the needle locking tube (11) is made of an electrostrictive material, and a positioning surface is provided on the portion of the needle (3) located between the needle locking tube (11); A damping adjustment ring (12) is fixedly connected to a position of the outer end of the needle fixing seat (2) corresponding to the bottom end of the roller (4); the damping adjustment ring (12) is electrically connected to a controller; the inner diameter of the damping adjustment ring (12) is equal to the inner diameter of the roller (4); the damping adjustment ring (12) is made of an electrostrictive material; and the expansion and contraction direction of the damping adjustment ring (12) is parallel to the axial direction of the needle fixing seat (2); The inner walls of the upper resistance adjustment tube (9) and the lower resistance adjustment tube (10) are both fixedly connected with a plurality of damping adjustment blocks (15), the plurality of damping adjustment blocks (15) are all made of electrostrictive material, and the plurality of damping adjustment blocks (15) are distributed in a circular array around the axis of the lower resistance adjustment tube (10); The method for using the sewing machine needle seat capable of adjusting thread tension comprises the following steps: S1. The controller adjusts the current of the drive coil (6), controls the rotational resistance of the drum (4), and monitors the speed and tension of the wire (8); S2. The controller determines the running state of the thread (8) according to the induced current of the driving coil (6), including detecting whether the thread (8) is broken; S3. The current of the damping adjustment block (15) in the upper resistance adjustment tube (9) and the lower resistance adjustment tube (10) is adjusted by the controller to expand the volume of the damping adjustment block (15) to squeeze the wire (8), thereby adjusting the movement resistance of the wire (8). When the wire (8) breaks, the damping adjustment block (15) can quickly lock the wire (8); S4. The controller adjusts the current of the damping adjustment ring (12) as needed, fine-tunes or locks the rotation of the drum (4); S5. The controller adjusts the working state of each component in real time according to the feedback information of the encoder and the drive coil (6) to maintain the optimal tension of the silk thread (8); S6. When the needle (3) needs to be replaced, the controller sends a signal to loosen the needle locking tube (11), and re-locks it after the replacement is completed.

2. A sewing machine needle holder with adjustable thread tension according to claim 1, characterized in that: The top end of the needle fixing seat (2) is connected to the base (1) by a positioning column (13); the positioning column (13) is a hexagonal pyramid structure, and the cross section of the positioning column (13) close to the base (1) is smaller than the cross section of the end close to the needle fixing seat (2); the base (1) and the positioning column (13) are provided with a hexagonal pyramid hole corresponding to the outer end of the positioning column (13).

3. A sewing machine needle holder with adjustable thread tension according to claim 2, characterized in that: The base (1) and the positioning column (13) are provided with through holes matching the plug pin (7) at positions corresponding to the plug pin (7); the plug pin (7) is a hexagonal pyramid structure, and the smaller end of the plug pin (7) is arranged away from the upper resistance adjustment tube (9); the smaller end of the plug pin (7) penetrates the positioning column (13) and the base (1) and extends to the outside of the base (1), and the extended portion is threadedly connected with a fixing nut (14).

4. The sewing machine needle holder with adjustable thread tension according to claim 1, characterized in that: The needle fixing seat (2) is made of non-magnetic material, the bottom end of the needle fixing seat (2) and the corresponding position of the lower resistance adjustment tube (10) are conical structures, and the end with a smaller diameter of the conical structure faces the direction close to the bottom end of the needle (3), and the angle between the axis of the lower resistance adjustment tube (10) and the axis of the needle fixing seat (2) is equal to the taper angle of the bottom end of the needle fixing seat (2).

5. The sewing machine needle holder with adjustable thread tension according to claim 1, characterized in that: The top and bottom ends of the drum (4) are both provided with bosses, and the plurality of permanent magnets (5) are distributed in a circular array around the axis of the drum (4).

6. A sewing machine needle holder with adjustable thread tension according to claim 1, characterized in that: A certain gap is reserved between two adjacent damping adjustment blocks (15), and the ends of the plurality of damping adjustment blocks (15) that are close to each other are all provided with rounded corners, and the extension and retraction directions of the plurality of damping adjustment blocks (15) are all radial directions of the upper resistance adjustment tube (9) or the lower resistance adjustment tube (10).

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