Double-path constant-tension rubber band conveying alarm mechanism

By using a dual-path constant tension elastic band conveying alarm mechanism, and utilizing intelligent integrated circuit boards and magnetic steel induction detection technology, the problems of uneven elastic band tension and inaccurate yarn breakage detection in sock machines have been solved, achieving efficient and stable elastic band conveying and knitting processes.

CN223921707UActive Publication Date: 2026-02-17SHAOXING YUEZHONG ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202520234356.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-14
Publication Date
2026-02-17
Estimated Expiration
2035-02-14

AI Technical Summary

Technical Problem

Existing sock knitting machines suffer from problems such as uneven elastic tension, low knitting efficiency, and inaccurate yarn breakage detection during the elastic band knitting process. In particular, mechanical alarms are prone to oxidation and poor contact, and are not suitable for applying wax oil to elastic bands.

Method used

It adopts a dual-path constant tension rubber band conveying alarm mechanism, including a tight yarn and yarn breakage alarm mechanism controlled by an intelligent integrated circuit board. It uses Hall sensors and magnets to detect tension changes, and combines a swing rod and a light rod design to enhance alarm sensitivity. It also detects yarn breakage through ceramic eyes and magnet repulsion, and is equipped with dual-path cylinders to improve system flexibility.

Benefits of technology

This achieved stable control of elastic band tension, improved weaving efficiency and product quality, reduced defect rates and equipment failures, and ensured production stability and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a double-path constant-tension rubber band conveying alarm mechanism. A conveying alarm device body comprises an integrated circuit board, a tight yarn alarm mechanism and a broken yarn alarm mechanism. The conveying alarm device body comprises a first connecting piece, a broken yarn alarm mechanism is installed at one end of the first vertical connecting piece, a right-angle bridge is fixedly arranged at the other end of the first vertical connecting piece, a second connecting piece is arranged at the lower end of the right-angle bridge, and one end of the second connecting piece is fixedly connected with the first connecting piece. A third connecting piece is fixedly arranged at the other end of the second connecting piece, a fourth connecting piece 104 and a fifth connecting piece are arranged at the two ends of the other side of the third connecting piece respectively, and a yarn tightening alarm mechanism is arranged at the other ends of the fourth connecting piece and the fifth connecting piece; a plurality of yarn feeding discs are arranged on the outer side of the yarn tightening alarm mechanism, and an integrated circuit board is arranged on the rear side of the first connecting piece. The yarn tightening alarm mechanism is additionally arranged on the rubber band conveying mechanism for knitting the socks, when the pressure of the rubber band yarn is too large, an alarm can be reliably given, and the effect of reducing defective socks is achieved.
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Description

Technical Field

[0001] This application relates to the field of sock machine equipment, and in particular to a dual-path constant tension elastic band conveying alarm mechanism. Background Technology

[0002] Every sock has an elastic band section during knitting, especially basketball socks, compression socks, and sports socks, which require very high elastic band tension. Currently, sock knitting machines mainly face the following three problems during the elastic band knitting process: 1. Due to the high elasticity of elastic bands, the elastic band tension is prone to uneven fluctuations during the unwinding process. If the elastic band tension fluctuates too much, the elastic band section of the sock will be of varying sizes. Generally, the elastic band yarn bobbin has low external tension and high internal tension, which is the main factor affecting the size of the elastic band section; 2. With the improvement of sock knitting machine manufacturing technology, the operating speed is getting faster and faster, and using ordinary stepper motors as the elastic band conveying mechanism will affect the knitting efficiency; 3. Currently, there are two main types of elastic band yarn breakage detection mechanisms: mechanical and photoelectric sensors.

[0003] Regarding the aforementioned technologies, the inventor believes that mechanical alarms have two major drawbacks: first, poor contact due to oxidation; second, if the yarn breaks at the shuttle and is still taut, the mechanical rod is unlikely to fall off and thus cannot trigger an alarm; also, because the rubber band is frequently coated with wax, it is not suitable for use with photoelectric sensors. Utility Model Content

[0004] To improve the constant tension conveying problem of elastic bands during the weaving process, as well as the alarms for excessive yarn tension, yarn breakage, and high-speed conveying of elastic bands, this application provides a dual-path constant tension elastic band conveying alarm mechanism.

[0005] The dual-path constant tension rubber band conveying alarm mechanism provided in this application adopts the following technical solution:

[0006] A dual-path constant tension elastic band conveying alarm mechanism includes a conveying alarm device body, which includes an integrated circuit board, a yarn tension alarm mechanism, and a yarn breakage alarm mechanism. The conveying alarm device body is intelligently controlled by the integrated circuit board.

[0007] The conveying alarm device body includes a connector one, one end of the upright connector one is equipped with the yarn breakage alarm mechanism, the other end of the connector one is fixed with a right-angle bridge, and a connector two is provided at the lower end of the right-angle bridge, one end of the connector two is fixedly connected to the connector one.

[0008] Connector 3 is fixed at the other end of connector 2, and connector 4 and connector 5 are respectively provided at both ends of the other side of connector 3. The yarn tension alarm mechanism is provided at the other end of connector 4 and connector 5.

[0009] The outer side of the yarn tightening alarm mechanism is provided with several yarn feeding discs 3;

[0010] An integrated circuit board is provided on the rear side of the connector one.

[0011] By adopting the above technical solution

[0012] Optionally, the yarn tension alarm mechanism includes a base, a bracket at one end of the base plane, a recess at the upper side of the bracket, a magnet five at the lower end of the recess, a Hall sensor at the upper end of the magnet five, and the magnet five corresponds to the magnetic field lines of the Hall sensor.

[0013] The Hall sensor is equipped with a plug;

[0014] A swing rod is provided on one side of the base, a magnet three is provided on the inner side of the swing rod, a magnet four is provided at the lower end of the magnet three, and the magnetic lines of the magnet three and the magnet four correspond to each other;

[0015] The three magnets and the four magnets are provided with optical rods on the side near the base;

[0016] Both sides of the swing rod are equipped with yarn-passing magnetic eyes.

[0017] By adopting the above technical solution and controlling it with an intelligent integrated circuit board, combined with yarn breakage and tension alarm mechanisms, the elastic tension changes during the conveying process can be monitored in real time, and timely alarms for yarn breakage or tension failures can be triggered to ensure the stable operation of the conveying system. The tension alarm mechanism uses Hall sensors and magnets to achieve magnetic field sensing and detection, which has high precision sensitivity and can accurately identify changes in elastic tension. When the tension is too high or too low, the alarm device will automatically trigger an alarm signal to prevent production interruption or damage to mechanical equipment due to abnormal tension. At the same time, the magnets of the tension alarm mechanism correspond to the magnetic field sensing, ensuring accurate detection of the tension status of the elastic during the conveying process. The alarm sensitivity is enhanced by the combination of a swing rod and a light rod with a magnetic eye design, ensuring efficient and stable operation of the equipment and precise control of the elastic conveying process, avoiding unnecessary losses caused by tension problems.

[0018] Optionally, the yarn-passing magnetic eye is a U-shaped groove with the groove opening facing upwards and both ends of the groove opening extending inwards.

[0019] By adopting the above technical solution, a U-shaped groove is designed in the yarn-passing magnetic eye, with the groove opening facing upward and both ends extending inward. This enhances the precise guidance and stable support of the yarn during the elastic band conveying process, ensuring that the elastic band is always in the correct position when passing the alarm device. This improves the accuracy of yarn-passing detection and alarm sensitivity, and prevents equipment failure caused by yarn misalignment or uneven tension.

[0020] Optionally, the yarn breakage alarm mechanism includes a platform, with downward-extending pull-down plates on both sides of the platform, and ceramic eyes at both ends of the pull-down plates.

[0021] By adopting the above technical solution, a platform and a downward-extending pull-down plate are provided in the yarn breakage alarm mechanism, and ceramic eyes are installed at both ends of the pull-down plate. This effectively enhances the real-time monitoring capability of yarn breakage. The ceramic eyes can accurately sense changes in yarn tension. When the yarn breaks, an alarm signal is triggered, thereby promptly reminding the operator and avoiding equipment failure or production interruption caused by yarn breakage during the production process.

[0022] Optionally, the ceramic eye is an open groove, with the groove facing outwards.

[0023] Optionally, the platform is equipped with a yarn breakage alarm device, which includes a magnet one, a magnet two, and a circuit board;

[0024] The yarn breakage alarm device is equipped with a circuit board at the upper end, and magnet one and magnet two are located at the lower end of the circuit board.

[0025] The positions of magnet one and magnet two are corresponding.

[0026] By adopting the above technical solution, a combination of magnet one, magnet two, and circuit board is set up in the yarn breakage alarm device. The principle of magnetic field line induction is used to achieve high-precision yarn breakage monitoring. When the yarn is normal, the magnetic field lines of magnet one and magnet two maintain a stable correspondence. The circuit board detects the state of the magnets by sensing changes in the magnetic field. If the yarn breaks, the circuit board receives the magnetic field change signal, thereby triggering the alarm system to issue an alarm and promptly reminding the operator to make adjustments or repairs.

[0027] Optionally, a pressure bar is provided at the lower end of the platform, one end of which is fixed to the lower end of the platform, and the other end of which extends outward.

[0028] Optionally, both the fourth and fifth connectors are provided with a plurality of compression springs on their outer surfaces, and the number of compression springs on the outer surfaces of the fourth and fifth connectors are equal and their positions correspond.

[0029] By adopting the above technical solution, the compression spring provides uniform pressure during the connection process, preventing loosening or instability, while ensuring more precise docking between the connecting parts, thus improving the overall safety and durability of the equipment.

[0030] Optionally, a pressure roller is provided on one side of the yarn breakage alarm mechanism of the connecting member, and a roller is provided at the lower end of the pressure roller.

[0031] By adopting the above technical solution, the yarn is guided smoothly through the yarn breakage alarm mechanism. When the yarn breaks, it can be detected in time and an alarm can be triggered, ensuring the safe operation of the yarn during the production process and avoiding production interruptions and equipment damage caused by yarn breakage.

[0032] Optionally, a right-angle bridge is provided on the side of the connector away from the yarn breakage alarm mechanism, and several cylinders are provided on the platform facing upwards of the right-angle bridge;

[0033] The number of cylinders is two.

[0034] By adopting the above technical solutions, the design of the right-angle bridge and cylinder can provide stable support and adjustment functions. The cylinder improves the automation and efficiency of the equipment, enhances the detection capability of yarn, and effectively prevents yarn breakage problems.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. A yarn tension alarm mechanism has been added to the existing elastic band conveying mechanism. When the elastic band yarn pressure is too high, it can reliably sound an alarm, reducing the number of defective socks.

[0037] 2. The use of Hall effect sensors for yarn breakage detection is more stable and reliable than the previous mechanical yarn breakage alarms.

[0038] 3. A high-speed closed-loop stepper motor controls the conveyor rollers, allowing for significant adjustment of the pressure spring force, thus counteracting fluctuations in yarn tension. This ensures that the knitted socks are uniform in size and tightness. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the dual-channel constant tension rubber band conveying alarm mechanism according to an embodiment of this application.

[0040] Figure 2 yes Figure 1 A schematic diagram of the medium-tight yarn alarm mechanism.

[0041] Figure 3 Yes, yes Figure 1 A schematic diagram of the yarn interruption alarm mechanism.

[0042] Explanation of reference numerals in the attached drawings: 100 Conveying alarm device body; 1. Integrated circuit board; 2. Yarn tension alarm mechanism; 201. Bracket; 10. Yarn feed magnetic eye; 11. Magnet three; 12. Smooth rod; 13. Magnet five; 14. Hall sensor; 15. Plug; 16. Magnet four; 17. Swing rod; 18. Base; 3. Yarn feed disc; 4. Compression spring; 5. Pressure roller; 6. Roller; 7. Yarn breakage alarm mechanism; 24. Circuit board; 71. Platform; 72. Pull-down plate; 73. Yarn breakage alarm device; 20. Ceramic eye; 21. Magnet one; 22. Magnet two; 23. Pressure rod; 8. Cylinder; 101. Connector one; 102. Connector two; 103. Connector three; 104. Connector four; 105. Connector five; 106. Right-angle bridge. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0044] This application discloses a dual-path constant tension rubber band conveying alarm mechanism. (Refer to...) Figure 1 The conveying alarm device body 100 includes an integrated circuit board 1, a high-speed motor conveying mechanism, a yarn tension alarm mechanism 2, and a yarn breakage alarm mechanism 7. The conveying alarm device body 100 is intelligently controlled by the integrated circuit board 1.

[0045] Integrated circuit board 1 includes functions such as motor drive, sensor detection, key display, and alarm. The high-speed motor conveying mechanism includes a high-speed stepper motor, conveying rollers, pressure rollers, yarn changing cylinders, and yarn tensioning springs.

[0046] The conveying alarm device body 100 includes a connector 101. One end of the upright connector 101 is equipped with the yarn breakage alarm mechanism 7. The other end of the connector 101 is fixed with a right-angle bridge 106. A connector 2 102 is provided at the lower end of the right-angle bridge 106. One end of the connector 2 102 is fixedly connected to the connector 101.

[0047] Connector 2 102 is fixed at the other end of connector 3 103. Connector 4 104 and connector 5 105 are respectively provided at the other two ends of connector 3 103. The yarn tension alarm mechanism 2 is provided at the other end of connector 4 104 and connector 5 105.

[0048] Several yarn feeding discs 3 are provided on the outside of the yarn tension alarm mechanism 2; an integrated circuit board 1 is provided on the rear side of the connector 101. The elastic yarn passes through the yarn feeding discs 3, through the ceramic eyes at both ends of the yarn tension alarm mechanism 2, then through two compression springs 4, then through the conveyor wheel 6 and the pressure wheel 5, and finally through the front and rear ceramic eyes of the yarn breakage alarm mechanism 7, and the pressure rod 23 is placed on the elastic yarn. Finally, the yarn enters the sock knitting machine.

[0049] Adjust the elastic force of the compression spring 4 so that the elastic yarn is in a relaxed state at the front end of the compression spring 4 and in a taut state at the rear end of the compression spring 4. This makes the elastic yarn in a taut state when passing through the roller 6, thus counteracting the tension fluctuation of the yarn during the weaving process. This requires the roller 6 to rotate at a high speed, so a high-speed closed-loop stepper motor is used.

[0050] When the front end of the compression spring 4 is in a relaxed state, if the yarn pressure at the front end is too high and the yarn tightening alarm mechanism 2 is triggered, the integrated circuit board will issue an alarm stop signal.

[0051] When a yarn breakage occurs, the pressure bar on the yarn breakage alarm mechanism 7 will fall, thereby triggering an alarm and stopping the machine.

[0052] Reference Figure 2 Two yarn-passing magnets 10 of the yarn tension alarm mechanism 2 are installed at both ends of the swing rod 17. A magnet 3 11 is installed at the lower front end of the swing rod 17, and a magnet 5 13 is installed at the upper rear end. The swing rod 17 is connected to the base 18 via a smooth rod 12. A magnet 4 16 is installed at the front end of the base 18. A Hall sensor 14 installed above the rear end of the base 18 can sense the distance of magnet 5 13, thus determining the tension of the elastic yarn. Magnet 4 16 and magnet 3 11 repel each other. When the yarn tension is too high, the front end of the swing rod 17 moves downward, and the rear end magnet 5 13 moves upward towards the Hall sensor 14. The signal is connected to the integrated circuit board 1 via a plug 15. The yarn tension alarm mechanism 2, through the yarn-passing magnets installed at both ends of the swing rod 17 and the magnets at different positions, combined with the Hall sensor 14... The signal transmission with the integrated circuit board 1 enables real-time detection of yarn tension changes. When the elastic yarn tension is too high, the front end of the swing rod 14 moves downward due to the mutual repulsion of the magnets, and the rear end magnet approaches the Hall sensor 14. The sensor senses the change in the position of the magnet and transmits the signal to the integrated circuit board, thereby issuing an alarm signal. This effectively monitors the yarn tension, promptly detects yarn problems caused by excessive tension, prevents machine equipment from malfunctioning due to abnormal tension, ensures the stability and safety of the production process, reduces downtime and losses caused by yarn problems, and improves production efficiency and product quality. It has technical effects such as precise monitoring, real-time alarm, intelligent control, and high reliability.

[0053] Reference Figure 3In the yarn breakage alarm mechanism 7, the elastic yarn passes through the front and rear ceramic eyes 20, and the pressure rod 23 is positioned above the elastic yarn. A magnet 22 is mounted on one end of the pressure rod 23, and a magnet 21 is mounted on the base. The magnets 22 and 21 repel each other, ensuring that when a yarn breaks, the pressure rod 23 reliably falls and rotates to a vertical position. A Hall sensor 14 is mounted on the circuit board 24 above. When the pressure rod is vertical, it senses the magnet 22. The circuit board 24 is connected to the main control integrated circuit board via wires. Through this structural design, the yarn breakage alarm mechanism 7 can achieve efficient and accurate yarn breakage detection. The elastic yarn passes through the front and rear ceramic eyes 20 and is suspended by the pressure rod 23. To ensure its normal working condition, the mutual repulsion between magnet 21 and magnet 22 ensures that the pressure bar 23 reliably falls and rotates to a vertical position when the yarn breaks, thereby triggering the Hall sensor 14. When the pressure bar 23 is vertical, the Hall sensor 14 can accurately detect the change signal of magnet 22 and transmit the signal to the circuit board 24 through the wire, and finally connect to the main control integrated circuit board to realize the yarn breakage alarm. This improves the automation level of the equipment, can react quickly when the yarn breaks, effectively prevents production line interruption, reduces manual inspection and downtime, ensures the efficiency and stability of the production process, and reduces operational risks and maintenance costs.

[0054] A right-angle bridge 106 is provided on the side of connector 101 away from the yarn breakage alarm mechanism 7. Several cylinders 8 are provided on the platform facing upwards from the right-angle bridge 106. There are two cylinders 8, which adopt a dual-output configuration. The cylinders can be selected to use either the left cylinder or the right cylinder. The dual-output function of the cylinders makes the system more flexible and reliable. During the operation of the yarn breakage alarm mechanism, the system adaptability is improved. The cylinder path can be flexibly switched according to the specific working environment or needs. It also effectively enhances the redundancy and stability of the equipment. If one cylinder fails or is unsuitable, the system can automatically switch to the other cylinder, ensuring the continuous operation of the yarn breakage alarm mechanism and avoiding system shutdown or alarm function failure due to the failure of a single cylinder. This further improves the reliability of the equipment and the efficient operation of the production line.

[0055] The implementation principle of the dual-path constant tension elastic band conveying alarm mechanism in this application embodiment is as follows: A dual-path constant tension elastic band conveying alarm mechanism, through intelligent control and precise tension monitoring, ensures constant tension of the elastic band yarn during the conveying process, thereby avoiding production failures and downtime caused by tension fluctuations or yarn breakage. The system includes modules such as an integrated circuit board, a high-speed motor conveying mechanism, a yarn tension alarm mechanism, and a yarn breakage alarm mechanism. The integrated circuit board is responsible for driving the motor, detecting sensor signals, key display, alarm functions, etc. A high-speed stepper motor and closed-loop control system are used to adjust the speed of the conveying rollers and pressure rollers to ensure stable yarn tension throughout the process. The yarn tension alarm mechanism uses a magnet and a Hall sensor to detect yarn tension changes in real time, and employs a swing rod and... The magnetic repulsion mechanism triggers an alarm signal when the tension is too high, preventing equipment damage or production instability caused by excessive tension. The yarn breakage alarm mechanism uses a pressure rod and a magnet to repel each other, triggering a Hall sensor alarm when the elastic yarn breaks, promptly responding to yarn breakage issues and preventing production interruptions. In addition, the system is designed with a dual-cylinder structure, providing greater flexibility and reliability. It can automatically switch cylinder paths according to demand or faults, thereby ensuring the continuous and efficient operation of the alarm function. This effectively improves the automation, stability, and production efficiency of textile equipment, reduces manual intervention and downtime, lowers production line maintenance costs and risks, and can accurately monitor tension and quickly respond to alarms, effectively avoiding production stoppages caused by yarn problems, and improving product quality and production efficiency.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual constant tension elastic band delivery alarm mechanism comprising a delivery alarm device body (100), characterized in that: The conveying alarm device body (100) comprises an integrated circuit board (1), a tight yarn alarm mechanism (2) and a broken yarn alarm mechanism (7), and the conveying alarm device body (100) is intelligently controlled by the integrated circuit board (1). The conveying alarm device body (100) comprises a connecting piece one (101), the connecting piece one (101) is installed at one end of the straight up broken yarn alarm mechanism (7), the other end of the connecting piece one (101) is fixed with a right angle bridge (106), the lower end of the right angle bridge (106) is provided with a connecting piece two (102), one end of the connecting piece two (102) is fixedly connected with the connecting piece one (101). The other end of the connecting piece two (102) is fixedly connected with a connecting piece three (103), the other side of the connecting piece three (103) is provided with a connecting piece four (104) and a connecting piece five (105), and the other end of the connecting piece four (104) and the connecting piece five (105) is provided with the tight yarn alarm mechanism (2). The outer side of the tight yarn alarm mechanism (2) is provided with a plurality of yarn feeding discs (3). The rear side of the connecting piece one (101) is provided with an integrated circuit board (1).

2. The dual constant tension rubber band delivery and alarm mechanism of claim 1, wherein: The tight yarn alarm mechanism (2) comprises a base (18), one end of the base (18) is provided with a support (201), the upper side of the support (201) is provided with a recess, the lower end of the recess is provided with a magnet steel five (13), the upper end of the magnet steel five (13) is provided with a Hall sensor (14), and the magnet steel five (13) and the Hall sensor (14) are in magnetic force line induction correspondence. The Hall sensor (14) is provided with a plug (15). One side of the base (18) is provided with a swing rod (17), the inner side of the swing rod (17) is provided with a magnet steel three (11), the lower end of the magnet steel three (11) is provided with a magnet steel four (16), and the magnet steel three (11) and the magnet steel four (16) are in magnetic force line correspondence. The magnet steel three (11) and the magnet steel four (16) are provided with a light rod (12) close to one side of the base (18). Both sides of the swing rod (17) are provided with a yarn passing magnetic eye (10).

3. The dual constant tension rubber band delivery and alarm mechanism of claim 2, wherein: The yarn passing magnetic eye (10) is a U-shaped groove, the groove opening of the yarn passing magnetic eye (10) is upward, and the both ends of the groove opening of the yarn passing magnetic eye (10) extend inward.

4. The dual constant tension rubber band delivery and alarm mechanism of claim 1, wherein: The broken yarn alarm mechanism (7) comprises a platform (71), both sides of the platform (71) are provided with downward extending pull-down plates (72), and both ends of the pull-down plates (72) are provided with ceramic eyes (20).

5. The dual constant tension rubber band delivery and alarm mechanism of claim 4, wherein: The ceramic eye (20) is an open groove, and the groove opening of the ceramic eye (20) is outward.

6. The dual constant tension rubber band delivery and alarm mechanism of claim 4, wherein: The platform (71) is provided with a broken yarn alarm device (73), the broken yarn alarm device (73) comprises a magnet steel one (21), a magnet steel two (22) and a circuit board (24). The upper end of the broken yarn alarm device (73) is provided with a circuit board (24), the lower end of the circuit board (24) is provided with a magnet steel one (21) and a magnet steel two (22). The positions of the magnet steel one (21) and the magnet steel two (22) correspond.

7. The dual constant tension rubber band delivery and alarm mechanism of claim 6, wherein: The lower end of the platform (71) is provided with a pressing rod (23), one end of the pressing rod (23) is fixed with the lower end of the platform (71), and the other end of the pressing rod (23) extends outward.

8. The dual constant tension rubber band delivery and alarm mechanism of claim 1, wherein: The outer side of the connecting piece four (104) and the connecting piece five (105) is provided with a plurality of compression springs (4), the number of the compression springs (4) on the outer side of the connecting piece four (104) and the connecting piece five (105) is equal and the positions are corresponding.

9. The dual constant tension rubber band delivery and alarm mechanism of claim 1, wherein: The connecting piece one (101) is provided with a pressing wheel (5) on one side of the broken yarn alarm mechanism (7), and the lower end of the pressing wheel (5) is provided with a roller (6).

10. The dual constant tension rubber band delivery and alarm mechanism of claim 1, wherein: The connecting piece one (101) is provided with a right angle bridge (106) on the side away from the broken yarn alarm mechanism (7), and the upward platform of the right angle bridge (106) is provided with a plurality of air cylinders (8). The number of the air cylinders (8) is two.