Towel thread loosening system for embroidery machine, embroidery machine and towel thread loosening detection method

Abstract

The invention relates to a towel thread loosening system for an embroidery machine, the embroidery machine and a towel thread loosening detection method. The system comprises a thread loosening motor assembly and a plurality of towel thread clamping devices which are respectively arranged on each machine head of the embroidery machine. The thread loosening motor assembly is in transmission connection with a thread spool stretching across the machine heads through a synchronous belt, the thread spool is sleeved with a plurality of transmission cams arranged corresponding to the towel thread clamping devices respectively, and each transmission cam is used for triggering the corresponding towel thread clamping device to loosen threads when the thread loosening motor assembly drives the thread spool to rotate. According to the embodiment of the invention, the structure is simple, and one thread loosening motor assembly can be used for driving the towel thread clamping assemblies at the multiple machine heads at the far and near ends of the embroidery machine to synchronously and stably loosen threads.

Description

Technical Field

[0001] This disclosure relates to the field of towel loosening technology for embroidery machines, and more specifically, to a towel loosening system for embroidery machines, an embroidery machine, and a towel loosening detection method. Background Technology

[0002] Towel embroidery is a special embroidery technique that creates a soft, three-dimensional, terry, or velvety effect on fabric. It is usually done by a towel embroidery machine or a towel embroidery head on a mixed embroidery machine.

[0003] In some related technologies, a motor is usually installed on one side of the frame of the towel embroidery machine to drive the thread clamps at multiple machine heads to loosen the thread. However, due to the large distance between the far and near ends, it is impossible to ensure that the thread is loosened synchronously at both ends. Summary of the Invention

[0004] The embodiments of this disclosure provide a towel loosening system for an embroidery machine, an embroidery machine, and a towel loosening detection method.

[0005] In a first aspect of this disclosure, a towel thread loosening system for an embroidery machine is provided. The system includes a thread loosening motor assembly and a plurality of towel thread clamps respectively disposed at each head of the embroidery machine. The thread loosening motor assembly is connected to a spool spanning the plurality of heads via a synchronous belt drive. A plurality of drive cams are fitted onto the spool, each corresponding to one of the towel thread clamps. Each drive cam, when the thread loosening motor assembly drives the spool to rotate, triggers the corresponding towel thread clamp to loosen the thread.

[0006] In some embodiments, the wire loosening motor assembly includes a wire loosening motor and a wire loosening synchronous pulley. A wire spool synchronous pulley is sleeved on the spool. The wire loosening synchronous pulley and the wire spool synchronous pulley are connected by a synchronous belt. The wire loosening motor drives the wire loosening synchronous pulley to rotate, thereby driving the spool to rotate via the synchronous belt.

[0007] In some embodiments, the wire loosening motor assembly includes a wire loosening motor, a wire loosening drive gear, a wire loosening driven gear, and a wire loosening timing pulley. The wire loosening motor drives the wire loosening drive gear to rotate, the wire loosening drive gear meshes with the wire loosening driven gear, the wire loosening timing pulley is coaxially arranged with the wire loosening driven gear, and the wire loosening timing pulley is connected to the spool via a timing belt drive.

[0008] In some embodiments, the wire loosening drive gear is sleeved on the wire loosening drive shaft, the wire loosening driven gear and the wire loosening synchronous pulley are sleeved on the wire loosening driven shaft, the wire loosening driven shaft is located above the wire loosening drive shaft, and the wire loosening motor is used to drive the wire loosening drive shaft to rotate.

[0009] In some embodiments, the towel clamp includes a clamping body, a plurality of clamping assemblies disposed on the clamping body, and a loosening top plate disposed on the clamping body and rotatable relative to the clamping body. The loosening top plate is used to be rotated under the action of a transmission cam to trigger the clamping assemblies to loosen the cord.

[0010] In some embodiments, the wire release body is provided with a wire release top plate, which is used to trigger multiple wire clamping assemblies to release the wire.

[0011] In some embodiments, the spool is located on the back side of the towel thread clamp, and the thread release motor assembly is mounted below the head of the embroidery machine and below the spool.

[0012] In some embodiments, the spool is provided with an encoder for sensing the rotation angle of the spool.

[0013] In a second aspect of this disclosure, an embroidery machine is provided. This embroidery machine includes the towel-loosening system for embroidery machines described in the first aspect above.

[0014] In a third aspect of this disclosure, a method for detecting loose threads in a towel for an embroidery machine is provided. This method is based on the towel loose thread system for an embroidery machine described in the first aspect above. The method includes acquiring a sensing signal from the encoder. Furthermore, the method includes determining that the towel clamp is in a loose thread state in response to the sensing signal being an origin signal.

[0015] It should be understood that the description in the Summary of the Invention section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0016] The above and other objects, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated in the drawings by way of example and not limitation.

[0017] Figure 1 A perspective view of a towel loosening system for an embroidery machine according to an embodiment of the present disclosure is shown.

[0018] Figure 2 A front view of a towel loosening system for an embroidery machine according to an embodiment of the present disclosure is shown;

[0019] Figure 3 A perspective structural view of a loose-wire motor assembly according to an embodiment of the present disclosure is shown;

[0020] Figure 4 A perspective structural diagram of a towel clamp according to an embodiment of the present disclosure is shown;

[0021] Figure 5 A flowchart is shown for a method for detecting loose threads in a towel for an embroidery machine according to an embodiment of the present disclosure.

[0022] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0023] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0024] The term "comprising" and its variations as used herein signify an open-ended inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Terms such as "upper", "lower", "front", and "rear", indicating placement or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the purpose of describing the principles of this disclosure, and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting this disclosure.

[0025] As mentioned earlier, towel embroidery machines employ a multi-head design, typically with a motor on one side of the frame to drive the towel thread clamps at multiple machine heads to loosen the thread. The more machine heads there are, the farther the driving force is transmitted, making it impossible to ensure the synchronous loosening of the thread by the towel thread clamps at multiple machine heads from near to far, or even to ensure that the multiple towel thread clamps return to their positions synchronously, returning to the thread-clamped state.

[0026] In some related technologies, two thread-releasing devices are installed on one side of the frame, connected by a thread-releasing drive shaft. Each thread-releasing device includes a thread-releasing motor, a small thread-releasing gear, and a large thread-releasing gear. The large thread-releasing gear is mounted on the thread-releasing drive shaft, and the small thread-releasing gear is mounted on the motor shaft of the thread-releasing motor. An electronic control system controls the two thread-releasing motors to rotate synchronously. The motor shafts of the thread-releasing motors drive the small thread-releasing gear, which in turn drives the large thread-releasing gear to rotate the thread-releasing drive shaft, thus achieving synchronous thread loosening at both ends of the towel embroidery machine. Although this method provides a large driving force for the rotation of the thread-releasing drive shaft by setting up two sets of thread-releasing devices, the driving force is still transmitted from one end to the other. As the distance of the driving force transmission increases, there is still a possibility that the thread loosening at the far end and the near end may not be synchronized. Furthermore, during the transmission process, the direct meshing of gears is mainly used to drive the rotation of the thread-releasing drive shaft rigidly connected to the large thread-releasing gear. At high speeds, the gear meshing produces metallic clanging sounds and vibrations, affecting the stability of the thread-releasing drive shaft's rotation. Because the meshing transmission of gears limits the installation distance between the motor shaft and the thread-releasing drive shaft, the center distance between their shafts cannot be very large. This poses a certain layout challenge for multi-head embroidery machines with limited space. To facilitate arrangement, the thread-releasing devices are placed on one side of the frame, especially with two horizontally arranged devices on one side of the frame, which greatly widens the lateral dimension of the frame.

[0027] To address this, according to an embodiment of this disclosure, a towel thread loosening solution for an embroidery machine is provided. A thread loosening motor assembly drives a spool spanning multiple machine heads via a synchronous belt drive. Multiple transmission cams mounted on the spool trigger multiple towel thread clamps to loosen the thread, thereby achieving synchronous thread loosening at both the near and far ends of the multi-head embroidery machine.

[0028] In this way, the thread-releasing motor assembly and the spool are connected via a synchronous belt drive. The synchronous belt drive operates smoothly and quietly, stably transmitting the driving force of the thread-releasing motor assembly to the spool. The spool triggers the towel thread clamps to release the thread via transmission cams mounted on it, ensuring a smoother transmission of the driving force from the spool to each towel thread clamp. By ensuring that all transmission cams are installed in the same phase, multiple transmission cams on a single spool can achieve smooth and synchronous thread release at both the near and far ends. Furthermore, since the spool is driven by a single motor via a synchronous belt, there is no cumulative error when driving each transmission cam to rotate with the spool, which is beneficial for achieving synchronous thread release at both the near and far ends of the embroidery machine. In addition, the installation position between the thread-releasing motor shaft and the spool is flexible and does not require installation within a small shaft center distance, allowing for compact assembly within the limited and complex installation space of the embroidery machine.

[0029] Figure 1 A perspective structural diagram is shown of a towel loosening system 100 for an embroidery machine according to an embodiment of the present disclosure. Figure 1As shown, the towel thread loosening system 100 includes a thread loosening motor assembly 120 and multiple towel thread clamps 110 respectively located at each head of the embroidery machine (the needle bar, thread cutting device, shuttle, etc. associated with the embroidery machine head are not shown in the figure). Only two are shown in the figure; the others are omitted. Figure 1 As shown, the thread-releasing motor assembly 120 is connected via a synchronous belt 120-5 to a spool 120-2 spanning multiple embroidery heads. Multiple transmission cams 120-3 are mounted on the spool 120-2, each corresponding to a towel thread clamp 110 (only two transmission cams are shown in the figure to correspond to the two towel thread clamps 110 shown). The thread-releasing motor assembly 120 drives the spool 120-2 to rotate, which in turn triggers the towel thread clamps corresponding to each transmission cam to loosen the thread. The thread-releasing motor assembly continues to drive the spool 120-2 forward. After rotating past the loosening angle, the towel thread clamp 110 switches from a loosened state to a clamped state until the spool 120-2 rotates back to its initial position, at which point the towel thread clamp 110 is in a clamped state.

[0030] like Figure 1 As shown, since the bobbin is connected to the thread-releasing motor assembly via a synchronous belt drive, and multiple transmission cams are fitted on the bobbin to trigger each towel thread clamp, the towel thread-releasing system can be positioned below the machine head on the frame. This frees up space on both sides of the frame, eliminating the need to increase the frame's lateral width. In some examples, the thread-releasing motor assembly 120 can be mounted on the thread-cutting box beam L below the embroidery machine head, either below a single machine head or below two adjacent machine heads. For example, in the layout shown, the thread-releasing motor assembly 120 is connected to the bobbin 120-2 between the two transmission cams corresponding to the two towel thread clamps. Based on this, considering the impact of the number of machine heads on the synchronous thread-releasing at both ends, the thread-releasing motor assembly 120 can be installed below the machine head in a suitable position. This allows the driving force transmitted from the synchronous belt to the bobbin to be distributed to both sides, rather than from one end to the more distant end, ensuring synchronous thread-releasing at both ends of the embroidery machine.

[0031] like Figure 1As shown, since the loosening motor assembly 120 and the bobbin 120-2 are connected by a synchronous belt 120-5, the loosening motor assembly 120 can be installed further down relative to the bobbin 120-2 by setting a synchronous belt of a certain length, thus avoiding interference with the back side of the towel clamp 110. In some embodiments, the loosening motor assembly 120 includes a loosening motor and a loosening synchronous pulley. A bobbin synchronous pulley is sleeved on the bobbin, and the loosening synchronous pulley and the bobbin synchronous pulley are connected by a synchronous belt. The loosening motor drives the loosening synchronous pulley to rotate, thereby driving the bobbin synchronous pulley to rotate via the synchronous belt, and the bobbin also rotates accordingly.

[0032] like Figure 1 As shown, each towel thread clamp 110 includes multiple thread clamping assemblies 104. A thread release motor assembly 120 triggers the thread clamping assemblies 104 on the towel thread clamp 110 to release the thread via a transmission cam 120-3. In some embodiments, a thread release top plate 106 is provided on the back side of the towel thread clamp 110, rotating relative to it. When the thread release top plate 106 rotates towards the thread clamping assembly 104, it supports the thread clamping assembly 104, thereby releasing the thread. Once the thread release top plate 106 returns to its original position, it no longer supports the thread clamping assembly 104, at which point the thread clamping assembly 104 clamps the embroidery thread. In one example, each towel thread clamp 110 has a thread release top plate 106 for triggering the multiple thread clamping assemblies 104 on the towel thread clamp 110 to release the thread. This allows for synchronous thread release of multiple thread clamping assemblies on the same towel thread clamp, which is beneficial for forming thread loops of the same height. In other embodiments, the back of the towel clamp is provided with a spring, which is pushed by a transmission cam to deform, thereby triggering the clamping assembly to loosen the cord.

[0033] Figure 2 A front view is shown of a towel loosening system 100 for an embroidery machine according to an embodiment of the present disclosure. Figure 2 As shown, the bobbin 102-2 spans multiple heads and is positioned on the back side of the towel clamp 110. The loosening motor assembly 120 is located on the rear lower side of the back of the towel clamp, below the bobbin 120-2. This arrangement, where the lower bobbin 120 drives the upper bobbin 120-2, reduces lateral space occupation and allows the driving force to be transmitted to the bobbin 120-2 via a synchronous belt, causing it to rotate. When the bobbin 120 rotates, the driving force is transmitted from the connection point between the bobbin and the synchronous belt to both sides of the bobbin, and then through multiple transmission cams on both sides of the bobbin, the driving force is transmitted to the towel clamp to trigger the loosening of the towel clamp. Figure 2As shown, the system 100 also includes an encoder 130, which is mounted on the spool 120-2 and used to sense the rotation angle of the spool to determine whether the loosening of the cord has been completed. In one example, the encoder 130 is located at the end of the spool 120-2, and by detecting the rotation angle of one spool, the loosening of the cord in multiple towel clamps can be detected.

[0034] Figure 3 A perspective structural view of a loose-wire motor assembly 120 according to an embodiment of the present disclosure is shown. Figure 3 As shown, the loosening motor assembly 120 includes a loosening motor 120-1, a loosening drive gear 120-6, a loosening driven gear 120-7, and a loosening synchronous pulley 120-4. The loosening drive gear 120-6 meshes with the loosening driven gear 120-7, and the loosening synchronous pulley 120-4 is mounted on the same shaft as the loosening driven gear 120-7. The loosening synchronous pulley 120-4 is connected to the spool synchronous pulley on the spool via a synchronous belt. The loosening motor 120-1 drives the loosening drive gear 120-6 to rotate, which in turn drives the loosening driven gear 120-7 and the loosening synchronous pulley 120-4 to rotate, which in turn drives the spool to rotate via the synchronous belt. In some embodiments, the loosening motor assembly also includes a transmission housing (the cover is removed in the figure to show the internal structure), and the transmission housing 120-8 houses the loosening drive shaft and the loosening driven shaft. The driven shaft for loosening the thread is located above the driving shaft for loosening the thread. The motor shaft of the loosening motor 120-1 is coaxially connected to the driving shaft for loosening the thread via a clamp-type connecting sleeve. A driving gear 120-6 for loosening the thread is mounted on the driving shaft for loosening the thread. A driven gear 120-7 for loosening the thread and a timing pulley 120-4 for loosening the thread are mounted on the driven shaft for loosening the thread. In this way, the loosening motor 120-1 transmits the driving force laterally to the driving gear for loosening the thread, then upwards to the driving gear 120-7 for loosening the thread and the timing pulley 120-4 for loosening the thread, and finally upwards to the spool via the timing belt. This allows for stable rotation of the spool with minimal space occupation, which in turn drives multiple towel clamps to loosen the thread synchronously by multiple transmission cams on the spool.

[0035] Figure 4 A perspective structural diagram of a towel clamp 110 according to an embodiment of the present disclosure is shown. Figure 4 As shown, the towel clamp 110 includes a clamping body 102, a plurality of clamping assemblies 104 disposed on the clamping body 102, and a loosening top plate 106. The clamping body 102 includes a clamping frame 102-1, on which the plurality of clamping assemblies 104 are arranged laterally. The clamping body 102 also includes a back cover 102-2 for concealing part of the back side of the clamping body 102.

[0036] In some embodiments, the loosening top plate 106 is connected to the back pin of the frame 102-1 of the clamping body 102. The loosening top plate 106 rotates relative to the clamping body 102, and can rotate towards the clamping assembly 104 to abut against the clamping assembly 104 to loosen the wire. Figure 4 As shown, the loosening top plate 106 is located on the back side of the frame 102-1 above the rear cover 102-2. In some examples, the loosening top plate 106 abuts against the loosening top rod 104-1 of the loosening assembly 104, which pushes forward to prevent the embroidery thread from being clamped. Furthermore, the loosening top plate 106 can rotate away from the loosening assembly 104. In one example, the pin connecting the loosening top plate 106 to the frame 102-1 has a torsion spring, allowing the loosening top plate 106 to rotate away from the loosening assembly 104 without being driven, rotating to the position held by the torsion spring, i.e., the loosening top plate 106 no longer acts on the loosening assembly 104, at which point the loosening assembly 104 switches from a loosened state to a clamped state.

[0037] In some embodiments, the wire clamping assembly 104 includes a wire loosening push rod 104-1, a first wire clamping plate 104-2, a second wire clamping plate 104-3, a wire loosening plate 104-4, a wire clamping nut 104-5, and a spring (not visible in the figure) disposed between the wire loosening plate 104-4 and the wire clamping nut 104-5. The wire loosening push rod 104-1 can extend and retract within the wire loosening screw 104-6, which is fixed to the frame 102-1 by passing through the frame 102-1 from the back side. A first wire clamping plate 104-2, a second wire clamping plate 104-3, a wire loosening plate 104-4, and a wire clamping nut 104-5 are sequentially fitted onto the wire loosening screw 104-6, with these components located on the front side of the frame 102-1. The embroidery thread is placed between the first wire clamping plate 104-2 and the second wire clamping plate 104-3. Because a compressed spring is provided between the wire loosening plate 104-4 and the wire clamping nut 104-5, the wire loosening plate 104-4 is pressed against one side of the second wire clamping plate 104-3. Correspondingly, the first wire clamping plate 104-2 is pressed against the front side of the frame 102-1 by the second wire clamping plate 104-3. When the portion of the loosening rod 104-1 located on the back side of the frame 102-1 is abutted, the loosening rod 104-1 pushes against the front side of the loosening screw 104-6, pushing against the loosening piece 104-4 (for example, the loosening piece can be an annular piece with a connecting portion spanning the diameter direction, and the loosening rod 104-1 pushes against the connecting portion of the annular piece), the spring between the loosening piece 104-4 and the clamping nut 104-5 is further compressed. At this time, the loosening piece 104-4 moves away from the second clamping piece 104-3, that is, the second clamping piece 104-3 is no longer clamped with the first clamping piece 104-2, and the embroidery thread between them is in a relaxed state. Once the loosening rod 104-1 is no longer abutted, the loosening rod 104-1 no longer pushes the loosening piece 104-4 forward, and the first clamping piece 104-2 and the second clamping piece 104-3 clamp together, and the embroidery thread between them is in a clamped state.

[0038] In one or more of the above embodiments, the towel thread clamp 110 further includes a thread guide 112, which has a plurality of thread holes 112-1, each thread hole 112-1 corresponding to a thread clamping assembly 104. The thread guide 112 is located above the thread clamping assembly 104 and is used to guide the embroidery thread to the thread clamping assembly 104 so that it can be clamped by the thread clamping assembly 104.

[0039] In one or more of the above embodiments, the towel thread clamp 110 further includes a plurality of thread guide rollers 108, each thread guide roller 108 corresponding to a thread clamping assembly 104. The thread guide rollers 108 are located below the thread clamping assembly 104 and are used to guide the embroidery thread coming out of the thread clamping assembly 104, so that the thread path is stable and controllable.

[0040] Figure 5 A flowchart is shown for a method 500 for detecting loose threads in a towel on an embroidery machine according to an embodiment of the present disclosure. The method 500 is implemented based on the towel loose thread system described in one or more of the above embodiments. Figure 5 As shown, in block 502, method 500 can acquire the encoder's sensing signal. In block 504, method 500 can determine that the towel clamp is in a loosened state in response to the sensing signal being a home signal. This method detects whether multiple towel clamps are in a loosened state by acquiring the sensing signal of an encoder mounted on the spool.

[0041] In some implementations, when the thread-releasing rod is pushed to the point where it releases the thread-releasing assembly from clamping the embroidery thread, the transmission cam on the spool has moved a certain distance, and the spool rotates a certain angle. The encoder records the sensing signal corresponding to this state as the origin signal. At this time, by identifying the sensing signal as the origin signal, it can be determined that the towel thread clamp is in the thread-releasing state. If the origin signal is not detected, an alarm needs to be triggered, and manual troubleshooting is required.

[0042] While several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0043] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0044] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A towel thread loosening system (100) for an embroidery machine, characterized in that, It includes a thread-releasing motor assembly (120) and multiple towel thread clamps (110) respectively located at each head of the embroidery machine; the thread-releasing motor assembly (120) is connected to a spool (120-2) spanning multiple heads via a synchronous belt (120-5); multiple transmission cams (120-3) are sleeved on the spool (120-2) respectively corresponding to each towel thread clamp (110); each transmission cam (120-3) is used to trigger the corresponding towel thread clamp (110) to release the thread when the thread-releasing motor assembly (120) drives the spool (120-2) to rotate.

2. The system (100) according to claim 1, characterized in that, The loosening motor assembly (120) includes a loosening motor and a loosening synchronous pulley. The spool (120-2) is fitted with a spool synchronous pulley. The loosening synchronous pulley and the spool synchronous pulley are connected by a synchronous belt (120-5). The loosening motor drives the loosening synchronous pulley to rotate, thereby driving the spool (120-2) to rotate via the synchronous belt (120-5).

3. The system (100) according to claim 1, characterized in that, The loosening motor assembly (120) includes a loosening motor (120-1), a loosening drive gear (120-6), a loosening driven gear (120-7), and a loosening synchronous pulley (120-4). The loosening motor (120-1) is used to drive the loosening drive gear (120-6) to rotate. The loosening drive gear (120-6) meshes with the loosening driven gear (120-7). The loosening synchronous pulley (120-4) is coaxially arranged with the loosening driven gear (120-7). The loosening synchronous pulley (120-4) is connected to the bobbin (120-2) via a synchronous belt (120-5).

4. The system (100) according to claim 3, characterized in that, The wire loosening drive gear (120-6) is sleeved on the wire loosening drive shaft, the wire loosening driven gear (120-7) and the wire loosening synchronous pulley (120-4) are sleeved on the wire loosening driven shaft, the wire loosening driven shaft is located above the wire loosening drive shaft, and the wire loosening motor (120-1) is used to drive the wire loosening drive shaft to rotate.

5. The system (100) according to claim 1, characterized in that, The towel clamp (110) includes a clamping body (102), a plurality of clamping assemblies (104) disposed on the clamping body (102), and a loosening top plate (106) disposed on the clamping body (102) and rotating relative to the clamping body (102). The loosening top plate (106) is used to be rotated under the action of the transmission cam (120-3) to trigger the clamping assembly (106) to loosen the cord.

6. The system (100) according to claim 5, characterized in that, The loosening body (102) is provided with a loosening top plate (106), which is used to trigger the loosening of multiple wire clamping assemblies (104).

7. The system (100) according to claim 1, characterized in that, The spool (120-2) is placed on the back side of the towel thread clamp (110), and the thread loosening motor assembly (120) is installed on the middle beam (L) of the thread cutting box below the head of the embroidery machine and is located below the spool (120-2).

8. The system (100) according to claim 1, characterized in that, The spool (120-2) is equipped with an encoder (130) for sensing the rotation angle of the spool (120-2).

9. An embroidery machine, characterized in that, Includes a towel loosening system (100) for an embroidery machine according to any one of claims 1 to 8.

10. A method for detecting loose threads on a towel used in an embroidery machine (500), characterized in that, Based on the towel thread loosening system for an embroidery machine according to claim 8, the method includes: Acquire the sensing signal of the encoder; and In response to the sensing signal being the origin signal, it is determined that the towel clamp is in a loose state.

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