Yarn trapper for embroidery machine with function of yarn take-up amplitude gear control

Abstract

The invention discloses a yarn trapper for an embroidery machine for yarn take-up amplitude gear control, which comprises a yarn trapper panel, a yarn passing wheel device is arranged on the yarn trapper panel, the yarn passing wheel device comprises a yarn passing wheel, the yarn passing wheel is connected with a sensor through a connecting rod, the periphery of the connecting rod is sleeved with a yarn adjusting device, and the yarn adjusting device is connected with the sensor. The yarn adjusting device comprises a take-up spring and an adjusting knob, the adjusting knob is matched with gear rotation of the yarn trapper panel to control the take-up amplitude of the take-up spring, and the take-up spring rotates along with rotation of the adjusting knob. According to the yarn take-up device, the take-up spring, the adjusting knob and the yarn passing wheel device are synchronously arranged, the yarn drives the yarn passing wheel to rotate, meanwhile, the take-up spring controlled by the adjusting knob is matched, the take-up spring adjusts the yarn take-up amplitude, and the technical purpose that the take-up amplitude is accurate and controllable is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of embroidery thread control of embroidery machines, in particular to a thread tensioner for an embroidery machine with thread take-up range gear control. BACKGROUND

[0002] During the embroidery operation of an embroidery machine, the embroidery needle pulls the thread to complete the piercing and forming of the fabric. When the embroidery needle moves up and down, the thread take-up range mainly depends on the control of the thread take-up spring. However, in a multi-head embroidery machine system, multiple embroidery needles work independently, and the thread take-up springs matched with the embroidery needles are affected by material batch differences, manufacturing tolerances or long-term use, resulting in uneven distribution of spring force, which further causes significant deviation of the thread take-up range. This deviation directly leads to problems such as uneven thread tension, blurred pattern outline and thread breakage, which seriously restricts the batch production quality of high-precision embroidery products. As the market's requirements for the fineness and consistency of embroidery products continue to increase, ensuring the accurate and synchronous control of the thread take-up range of all embroidery needles in a multi-head embroidery machine has become a core problem in the industry. In addition, as the installation carrier of the thread take-up spring, the structure design of the thread tensioner directly affects the stability of the thread path and the sensitivity of the thread tension response. The existing thread tensioner has obvious shortcomings in terms of adjustment accuracy, operation convenience and long-term operation reliability, and it is difficult to meet the stringent requirements of modern embroidery technology for dynamic thread take-up control. Therefore, how to further improve the overall structural performance of the thread tensioner is also an object of research for those skilled in the art. SUMMARY

[0003] The application aims to provide a thread tensioner for an embroidery machine with thread take-up range gear control, which can accurately adjust the thread take-up range, ensure uniform thread tension of the embroidery product, reduce the risk of thread breakage, and improve production efficiency and embroidery quality.

[0004] The application provides a thread tensioner for an embroidery machine with thread take-up range gear control, which includes a thread tensioner panel, a thread guide wheel device is installed on the thread tensioner panel, the thread guide wheel device includes a thread guide wheel, the thread guide wheel is connected to a sensor through a connecting rod, a yarn adjusting device is sleeved on the outer periphery of the connecting rod, the yarn adjusting device includes a thread take-up spring and an adjusting knob, the adjusting knob matches the gear of the thread tensioner panel, the adjusting knob controls the thread take-up range of the thread take-up spring through rotation, and the thread take-up spring rotates simultaneously with the rotation of the adjusting knob. The application synchronously sets the thread take-up spring, the adjusting knob and the thread guide wheel device, the thread take-up spring is adjusted by the thread take-up spring and the adjusting knob, the thread take-up range is accurately controllable, and the technical purpose is achieved.

[0005] The adjusting knob comprises an upper knob and a lower knob, a take-up spring is installed between the upper knob and the lower knob, the take-up spring comprises a first limiting section, an axially extending spring tube, a second limiting section and a hooking spring, the first limiting section is axially arranged, the first limiting section is integrally connected to form a coiled spring tube, the spring tube is further connected to the radial second limiting section, the second limiting section is connected to the curved hooking spring, and the first limiting section is matched with the clamping groove of the lower knob.

[0006] The upper knob comprises a first protrusion and a first center positioning tube, the outer side of the first center positioning tube is provided with a limiting protrusion; the lower knob comprises a limiting buckle and a second center positioning tube, the inner wall of the second center positioning tube is respectively provided with a limiting groove matched with the limiting protrusion and a clamping groove matched with the first limiting section, and the outer wall of the second center positioning tube is provided with an annular mounting groove for mounting the spring tube between the second center positioning tube and the lower knob.

[0007] The upper knob is connected with the lower knob through the connecting shaft matched with the connecting hole of the lower knob, and the second limiting groove is arranged between the upper knob and the lower knob, and the second limiting groove is matched with the second limiting section of the take-up spring.

[0008] One end of the second limiting groove is provided with a limiting column, one end of the limiting column at the axial two ends is connected with the first mounting hole at the bottom of the first protrusion, and the other end is connected with the second mounting hole on the upper side of the upper knob.

[0009] The lower knob is connected with an elastic tab, the elastic tab is matched with the gear of the thread clamp panel, and the position scale of the take-up spring on the surface of the thread clamp panel is correspondingly arranged according to the different gear positions matched with the elastic tab. The elastic tab preferably can be provided with a protrusion matched with the gear of the thread clamp panel, the gear can be a plurality of arc grooves for limiting the protrusion, the protrusion enters the arc groove or leaves another arc groove under the driving of the rotation of the lower knob, so that the gear change of the take-up spring relative to the thread clamp panel is realized.

[0010] The thread clamp panel is provided with a third mounting hole for mounting the adjusting knob, the limiting buckle is axially clamped on the bottom surface of the thread clamp panel through the axial elastic force of the spring tube relative to the third mounting hole, and the rotation amplitude of the adjusting knob is limited through the second limiting groove on the side of the third mounting hole relative to the third mounting hole.

[0011] The connecting rod and the sensor connecting end are provided with a screw hole, the screw hole is threadedly connected with a screw rod, the screw rod is fixedly connected with the sensor, the rod body of the connecting rod passes through the first center positioning tube and the second center positioning tube, and the sensors at the two ends of the connecting rod and the thread passing wheel are respectively located on the two sides of the adjusting knob in the axial elastic force of the spring tube, so that the adjusting knob, the sensor and the thread passing wheel are integrally connected.

[0012] As can be seen from the above, the yarn take-up amplitude control device for embroidery machines provided in this application achieves precise control of the yarn take-up amplitude by adjusting the knob in conjunction with the gear control of the take-up spring. This allows for precise adjustment of the yarn take-up amplitude, ensuring uniform and consistent embroidery stitches, reducing the risk of thread breakage, and improving production efficiency and embroidery quality. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of a yarn clamp for an embroidery machine that controls the yarn take-up amplitude level according to the present invention.

[0015] Figure 2 This is a schematic diagram of the internal three-dimensional structure of a yarn clamp for an embroidery machine that controls the yarn take-up amplitude level according to the present invention.

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the wire clamp panel in this invention;

[0017] Figure 4 This is a three-dimensional structural diagram of the wire guide device in this invention;

[0018] Figure 5 This is a three-dimensional diagram of the exploded structure of the wire guide device in this invention;

[0019] Figure 6 This is a schematic diagram of the three-dimensional structure of the thread guide wheel in this invention;

[0020] Figure 7 This is a three-dimensional structural diagram of the upper knob from another angle in this invention;

[0021] Figure 8 This is a three-dimensional structural diagram of the lower knob from another angle in this invention. Detailed Implementation

[0022] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. The detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," "upper," and "lower" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Traditional multi-head embroidery machines suffer from inconsistent thread take-up during the embroidery process due to variations in the spring force of the take-up spring corresponding to each needle, affecting the quality of the embroidery. Furthermore, the thread clamp, a crucial component for housing the take-up spring, still has room for improvement in its overall structural performance.

[0025] To address this issue, this application proposes a yarn clamp for an embroidery machine that controls the yarn take-up amplitude. The clamp includes a clamp panel 2 with a thread guide roller assembly mounted on it. This assembly includes a thread guide roller 3, which is connected to a sensor 18 via a connecting rod 4. A yarn adjustment device, consisting of a take-up spring 9 and an adjustment knob, is sleeved around the connecting rod 4. The adjustment knob, in conjunction with the clamp panel 2's setting 50, controls the take-up amplitude of the take-up spring 9 by rotation, and the take-up spring 9 rotates synchronously with the adjustment knob.

[0026] For ease of understanding, the following explains some key terms in this embodiment:

[0027] The wire clamp panel 2 is the main support structure of the embroidery machine's wire clamp, used to install and fix the various components inside the wire clamp, and to provide an operating interface.

[0028] The thread guide is a mechanism used to guide the yarn through the thread clamp, ensuring that the yarn moves smoothly during embroidery.

[0029] The guide roller 3 is a component in the guide roller device. Its function is to carry and guide the yarn, and reduce the friction of the yarn during movement.

[0030] The connecting rod 4 is used to connect the guide wheel 3 and the sensor 18, and to transmit the displacement information of the guide wheel 3 to the sensor 18.

[0031] Sensor 18 is used to detect the displacement of connecting rod 4, thereby indirectly reflecting whether the yarn is in a broken state and issuing an alarm in time.

[0032] A yarn adjustment device is a mechanism used to adjust the yarn take-up amplitude. Its core lies in changing the preload or working stroke of the take-up spring mechanically.

[0033] The take-up spring 9 is a key elastic element in the yarn adjustment device. Its elastic deformation is used to absorb and release the yarn and control the take-up amplitude of the yarn.

[0034] The adjustment knob is the operating component of the yarn adjustment device. By manually rotating it, the take-up amplitude of the take-up spring 9 can be adjusted.

[0035] Position 50 is a mark or structure on the cable clamp panel 2 used to indicate or limit the rotation position of the adjustment knob, usually corresponding to different take-up amplitude settings.

[0036] This embodiment provides a yarn clamp for embroidery machines that controls the yarn take-up amplitude.

[0037] The wire clamp includes a wire clamp panel 2. The wire clamp panel 2 can be made of sheet metal or high-strength plastic, and has holes and slots for mounting other components. Alternatively, the wire clamp panel 2 can be designed as a one-piece structure to provide stable support.

[0038] A thread guide roller device is installed on the thread clamp panel 2. This thread guide roller device can be fixedly installed at a specific position on the thread clamp panel 2, for example, by screws or riveting. The installation position of the thread guide roller device is selected to facilitate the passage of yarn and ensure its stability on the thread clamp panel 2.

[0039] The yarn guide device includes a yarn guide wheel 3 through which the yarn is guided to reduce friction and ensure smooth movement.

[0040] The guide roller 3 is connected to the sensor 18 via a connecting rod 4. The connecting rod 4 can be a slender metal rod, with one end connected to the axis of the guide roller 3 and the other end connected to the input end of the sensor 18. The sensor 18 can be configured to detect the linear displacement or angular deflection of the connecting rod 4, thereby sensing the motion state of the guide roller 3.

[0041] A yarn adjusting device is sleeved around the outer periphery of the connecting rod 4. The yarn adjusting device can be designed as a cylindrical structure surrounding the connecting rod 4, allowing the connecting rod 4 to move axially or radially within it. This sleeved configuration ensures that the yarn adjusting device can apply force to the connecting rod 4.

[0042] The yarn adjusting device includes a take-up spring 9 and an adjusting knob. The take-up spring 9 can be a helical compression spring, with one end fixed and the other end in contact with the connecting rod 4 or its related components. The adjusting knob can be a graduated circular knob, which changes the preload of the take-up spring 9 by rotation. For example, the take-up spring 9 can be installed in a sleeve, and the adjusting knob is threadedly connected to the sleeve; rotating the knob compresses or releases the spring.

[0043] The adjustment knob is coordinated with the position 50 of the wire clamp panel 2. The position 50 of the wire clamp panel 2 can be a series of scale lines or grooves used to indicate different rotation positions of the adjustment knob. The adjustment knob may have an indicator mark, which aligns with the position 50 on the wire clamp panel 2 when the adjustment knob is rotated, thereby achieving the positioning of the take-up amplitude.

[0044] The adjustment knob controls the take-up amplitude of the take-up spring 9. When the adjustment knob is rotated, its internal mechanism changes the initial compression or effective length of the take-up spring 9. For example, the adjustment knob can directly act on the take-up spring 9 through a cam mechanism, changing its operating point and thus adjusting the take-up amplitude.

[0045] The take-up spring 9 rotates simultaneously with the adjustment knob. This means there is a linkage between the take-up spring 9 and the adjustment knob; when the adjustment knob is operated, the take-up spring 9 also rotates. For example, one end of the take-up spring 9 can be fixed to the internal structure of the adjustment knob to achieve synchronous rotation.

[0046] This application discloses a thread clamp for embroidery machines that controls the yarn take-up amplitude. By setting an adjustment knob in conjunction with the clamp's control panel, it achieves precise and controllable adjustment of the take-up amplitude of the take-up spring. When the adjustment knob rotates, the take-up spring rotates synchronously, ensuring the stability and reliability of the adjustment process. This effectively solves the problem of inconsistent yarn take-up amplitude caused by differences in the take-up springs in existing multi-head embroidery machines, improving the quality of embroidery products and optimizing the overall structural performance of the thread clamp.

[0047] To address this, this application further proposes a yarn take-up amplitude control device for embroidery machines. This device controls the take-up amplitude of the take-up spring 9 by adjusting a knob in conjunction with the setting 50 on the device panel 2. The take-up spring 9 rotates simultaneously with the knob. However, ensuring a stable and reliable connection and synchronous rotation between the knob and the take-up spring 9, and enabling the take-up spring 9 to effectively and precisely respond to the knob's rotation to achieve fine-grained control of the yarn take-up amplitude at different settings, remains a technical problem that requires further resolution.

[0048] To address the aforementioned problems, this application proposes an improved structure for the adjusting knob and the take-up spring 9. Specifically, the adjusting knob includes an upper knob 6 and a lower knob 14, with a take-up spring 9 installed between the upper knob 6 and the lower knob 14. The take-up spring 9 includes an integrally formed first limiting section 10, an axially extending spring tube 69, a second limiting section 81, and a hook spring 8. The first limiting section 10 engages with a slot 13 located on the lower knob 14.

[0049] The adjustment knob is designed to consist of two main components: an upper knob 6 and a lower knob 14. This split structure facilitates the installation and removal of the take-up spring 9, while providing flexible configuration space for the internal structure of the adjustment knob. For example, different functions or materials can be integrated separately to optimize its operating feel and durability. The take-up spring 9 is precisely positioned and installed between the upper knob 6 and the lower knob 14. This installation method ensures that the take-up spring 9 can function as an integral part of the adjustment knob, rotating synchronously with the adjustment knob, thereby achieving direct control over the yarn take-up amplitude. The take-up spring 9 is manufactured using a one-piece molding process, and its structure includes multiple functional segments. The first limiting segment 10 is used to cooperate with the specific structure of the adjustment knob, providing initial positioning and fixation. The axially extending spring tube 69 is the main body of the take-up spring 9. The second limiting segment 81 is located at the other end of the spring tube 69. The hook spring 8 is the part that directly contacts the yarn, and its curved structure is designed to effectively hook and guide the yarn, ensuring that the yarn is stably subjected to the tension of the spring during the take-up process. The first limiting section 10 of the take-up spring 9 is designed to precisely engage with the limiting groove 13 inside the lower knob 14. This engagement ensures that the take-up spring 9 can be accurately positioned during installation, thereby guaranteeing a reliable connection and synchronous rotation between the take-up spring 9 and the adjusting knob, and ensuring the stability and accuracy of the adjustment action.

[0050] Through the above technical solution, the adjustment knob is designed as a combination of an upper knob 6 and a lower knob 14, with a finely structured take-up spring 9 installed between them. This application effectively solves the problems of unstable connection and poor synchronization between the adjustment knob and the take-up spring 9. Specifically, the structure of the integrally formed first limiting section 10, axially extending spring tube 69, second limiting section 81, and hook spring 8 of the take-up spring 9 allows for precise manufacturing and stable installation of the take-up spring 9. In particular, the cooperation between the first limiting section 10 and the limiting groove 13 of the lower knob 14 ensures that the take-up spring 9 can rotate firmly with the adjustment knob when it rotates, avoiding relative slippage or loosening. This structural design allows each rotation of the adjustment knob to be accurately and stably transmitted to the take-up spring 9, thereby achieving refined and reliable control of the yarn take-up amplitude, significantly improving the adjustment accuracy and working stability of the embroidery machine's thread clamp under different yarn tension requirements.

[0051] In some embodiments described above in this application, an adjustment knob is proposed to consist of an upper knob 6 and a lower knob 14, with a take-up spring 9 installed between them, and has a specific structure. However, in its implementation, how to ensure precise fit and stable connection between the upper knob 6 and the lower knob 14, and between them and the take-up spring 9, and to provide reliable installation and limiting for the take-up spring 9 so as to ensure that the take-up spring 9 can stably follow the rotation and accurately adjust the take-up amplitude when the adjustment knob is rotated, is a technical problem that needs to be solved.

[0052] In this regard, this application further proposes that the upper knob 6 includes a first protrusion 5 and a first central positioning tube 7, and the outer side of the first central positioning tube 7 is provided with a limiting protrusion 24; the lower knob 14 includes a limiting buckle 15 and a second central positioning tube 19, the inner wall of the second central positioning tube 19 is provided with a limiting groove 20 that cooperates with the limiting protrusion 24 and a slot 13 that cooperates with the first limiting segment 10, and an annular mounting groove 44 for installing a spring tube 69 is provided between the outer wall of the second central positioning tube 19 and the lower knob 14.

[0053] Specifically, the upper knob 6, as the upper component of the adjustment knob, is mainly used for user operation and rotation, and cooperates with the lower knob 14 to jointly support and drive the take-up spring 9. The first protrusion 5, located on the upper knob 6, can provide operation position guidance or serve as a connection or limiting structure with other components. For example, it can be an anti-slip protrusion for user gripping, or it can cooperate with a specific structure on the cable clamp panel 2 to provide positioning or limiting during rotation. The first central positioning tube 7 is a tubular structure inside the upper knob 6, typically used to guide and position the connecting rod 4, ensuring that the rotation center of the adjustment knob is aligned with the axis of the connecting rod 4, thereby ensuring smooth rotation. It can also serve as the structural basis for connecting the upper knob 6 with other components (such as the lower knob 14). The limiting protrusion 24, located outside the first central positioning tube 7, primarily functions to cooperate with the limiting groove 20 on the lower knob 14 to achieve radial positioning between the upper knob 6 and the lower knob 14, preventing relative sliding or separation, while allowing relative rotation or locking under specific conditions. The limiting protrusion 24 can be designed as multiple protrusions distributed along the circumference, or as a ring protrusion.

[0054] The lower knob 14, as the lower component of the adjustment knob, cooperates with the upper knob 6 to form the main body of the adjustment knob, and directly connects to or limits a specific part of the take-up spring 9 (such as the first limiting section 10). The limiting buckle 15 is located on the lower knob 14, and its main function is to engage with the corresponding structure on the wire clamp panel 2, thereby fixing the entire adjustment knob assembly to the wire clamp panel 2, preventing axial disengagement, and allowing radial rotation. The limiting buckle 15 can be an elastic claw or a deformable tongue structure. The second central positioning tube 19 is a tubular structure inside the lower knob 14, corresponding to the first central positioning tube 7, and is also used to guide and position the connecting rod 4. It also serves as the structural basis for connecting the lower knob 14 with other components (such as the upper knob 6 and the take-up spring 9). The limiting groove 20 is located on the inner wall of the second central positioning tube 19 and is specifically designed to cooperate with the limiting protrusion 24 on the upper knob 6. This fit ensures precise alignment of the upper knob 6 and lower knob 14 during assembly and provides a stable connection, preventing loosening or misalignment during adjustment. The limiting groove 20 can be designed to match the shape of the limiting protrusion 24 for reliable engagement. The locking groove 13 is located on the inner wall of the second center positioning tube 19 and is used to engage with the first limiting section 10 of the take-up spring 9. The design of the locking groove 13 allows the first limiting section 10 to be securely fixed inside the lower knob 14, ensuring that the take-up spring 9 rotates synchronously with the adjustment knob and accurately transmits torque to change the take-up amplitude. The shape and size of the locking groove 13 should precisely match the first limiting section 10 to provide reliable limiting and transmission. The annular mounting groove 44 is located between the outer wall of the second center positioning tube 19 and the lower knob 14 and is specifically used to mount the spring tube 69 of the take-up spring 9. This annular groove provides a stable support and mounting position for the spring tube 69, ensuring that the spring tube 69 can maintain its shape and function when rotated and under force, and preventing radial displacement or deformation during adjustment, thereby ensuring the normal operation of the take-up spring 9.

[0055] Through the above technical solution, the first central positioning tube 7 on the upper knob 6 and its outer limiting protrusion 24 cooperate with the limiting groove 20 on the inner wall of the second central positioning tube 19 of the lower knob 14, achieving precise axial and radial positioning between the upper knob 6 and the lower knob 14, ensuring stable connection and reliable assembly of the adjustment knob assembly. Simultaneously, the slot 13 on the inner wall of the second central positioning tube 19 of the lower knob 14 can firmly cooperate with the first limiting section 10 of the take-up spring 9, while the annular mounting groove 44 between the outer wall of the second central positioning tube 19 and the lower knob 14 provides a stable mounting space for the spring tube 69. This precise structural design effectively solves the problems of loose connection and unstable transmission between the adjustment knob and the take-up spring 9, ensuring that the take-up spring 9 can stably follow the rotation when the adjustment knob rotates, thereby achieving precise and reliable control of the yarn take-up amplitude and improving the working stability and adjustment accuracy of the yarn clamp.

[0056] In some embodiments described above, the adjusting knob consists of an upper knob 6 and a lower knob 14, and is equipped with a take-up spring 9. The take-up spring 9 has a first limiting section 10, a spring tube 69, and a second limiting section 81. However, in practical applications, ensuring the stability and coaxiality of the connection between the upper knob 6 and the lower knob 14, and effectively fixing the second limiting section 81 of the take-up spring 9 to prevent displacement or detachment during the rotation of the adjusting knob, thereby affecting the precise control of the yarn take-up amplitude and the long-term stability of the adjusting mechanism, is a problem that needs to be solved.

[0057] In this regard, this application further proposes that the upper knob 6 is connected to the lower knob 14 through the connecting shaft 26 and the connecting hole, and a second limiting groove 23 is provided between the upper knob 6 and the lower knob 14, which cooperates with the second limiting segment 81 of the winding spring 9.

[0058] Specifically, the connecting shaft 26 is a component used to achieve the mechanical connection between the upper knob 6 and the lower knob 14. It can be designed as a cylinder, polygon, or have a keyway to ensure synchronous movement during rotation. The connecting hole is a cavity on the lower knob 14 to accommodate the connecting shaft 26; its inner wall shape should match the outer shape of the connecting shaft 26 to achieve a tight fit. This connection method ensures that the upper knob 6 and the lower knob 14 maintain good coaxiality and structural stability during rotational adjustment, avoiding inaccurate adjustment or component wear due to looseness or eccentricity. The fit between the connecting shaft 26 and the connecting hole can be an interference fit or a clearance fit, depending on the required connection strength and ease of assembly. For example, various forms such as threaded connection, pin connection, or snap-fit ​​connection can be used to adapt to different manufacturing processes and usage requirements.

[0059] Meanwhile, the second limiting groove 23 is a structural feature located between the upper knob 6 and the lower knob 14. Its main function is to provide a precise positioning and constraint space for the second limiting segment 81 of the take-up spring 9. The shape and size of this groove should match the shape of the second limiting segment 81; for example, it can be designed as a U-shaped, V-shaped, or rectangular groove to ensure that the second limiting segment 81 can be securely accommodated within it. The second limiting groove 23 is designed to prevent the second limiting segment 81 from radially displacing when the adjusting knob rotates or is subjected to force, thereby ensuring that the take-up spring 9 is always in the correct working position. This fit is an important mechanism for achieving stable operation of the take-up spring 9. As part of the take-up spring 9, the second limiting segment 81 is constrained by the second limiting groove 23, enabling the take-up spring 9 to reliably follow the rotation of the adjusting knob and accurately transmit torque. Through this fit, the twisting, deformation, or detachment of the take-up spring 9 during operation can be effectively prevented, thereby ensuring the adjustment accuracy and repeatability of the yarn take-up amplitude.

[0060] Through the above technical solution, the upper knob 6 and the lower knob 14 are securely and coaxially connected via the connecting shaft 26 and the connecting hole, effectively solving the problem of loosening or eccentricity that may occur during the rotation of the adjustment knob, and improving the overall structural strength and operational stability of the adjustment mechanism. Simultaneously, the second limiting groove 23 provided between the upper knob 6 and the lower knob 14 can precisely cooperate with and constrain the second limiting segment 81 of the take-up spring 9, ensuring that the take-up spring 9 maintains the correct positioning during adjustment and preventing unnecessary displacement or disengagement. This allows the take-up spring 9 to more reliably follow the rotation of the adjustment knob, thereby achieving more precise and stable control over the yarn take-up amplitude, significantly improving the working reliability and adjustment accuracy of the embroidery machine's thread clamp.

[0061] In some embodiments described above, a second limiting groove 23 is provided between the upper knob 6 and the lower knob 14. This second limiting groove 23 is designed to cooperate with the second limiting segment 81 of the take-up spring 9 to effectively limit the take-up spring 9. However, in practical applications, if the structure of the second limiting groove 23 fails to provide sufficient support and fixation, the second limiting segment 81 of the take-up spring 9 may experience slight wobbling or inaccurate positioning during frequent adjustments or under stress, thereby affecting the accuracy and stability of the yarn take-up amplitude.

[0062] In this regard, this application further proposes that the second limiting groove 23 is provided with a limiting post 11 at one end, and the two ends of the limiting post 11 are connected to the first mounting hole 27 at the bottom of the first protrusion 5 and the other end is connected to the second mounting hole 12 on the upper side of the knob 6.

[0063] Specifically, the second limiting groove 23 is a structural space located between the upper knob 6 and the lower knob 14. Its main function is to provide a receiving and limiting area for the second limiting section 81 of the take-up spring 9. Through its shape and size design, it ensures that the second limiting section 81 can be effectively constrained during rotation, thereby achieving precise control over the take-up amplitude of the take-up spring 9. The limiting post 11 is a columnar structure located at one end of the second limiting groove 23. Its main function is to provide additional support and positioning for the second limiting section 81 of the take-up spring 9, preventing unnecessary shaking or displacement during force application or rotation. The limiting post 11 can be cylindrical, square, or other geometric shapes suitable for providing support and limiting functions. Its material is usually the same as that of the upper knob 6 or the lower knob 14 to ensure structural strength and durability. The first mounting hole 27 is a hole located at the bottom of the first protrusion 5, used to fix one end of the limiting post 11. The first protrusion 5, as part of the upper knob 6, has a first mounting hole 27 at its bottom providing a stable axial connection point for the limiting post 11, ensuring that the limiting post 11 can be securely installed in a specific position in the second limiting groove 23. This mounting hole 27 can be a threaded hole, a mating hole, or other similar form to achieve a reliable connection of the limiting post 11. The second mounting hole 12 is a hole located on the upper side of the upper knob 6, used to fix the other end of the limiting post 11. Working together with the first mounting hole 27, the second mounting hole 12 further enhances the axial fixing effect of the limiting post 11, enabling it to withstand the radial and axial forces from the second limiting section 81 of the take-up spring 9, thereby ensuring the stability of the limiting post 11 during the operation of the wire clamp. This mounting hole 12 can also be a threaded hole, a mating hole, or other similar form.

[0064] By setting a limiting post 11 at one end of the second limiting groove 23 and connecting its two axial ends to the first mounting hole 27 at the bottom of the first protrusion 5 and the second mounting hole 12 on the upper side of the upper knob 6, this application effectively enhances the positioning effect of the second limiting groove 23 on the second limiting segment 81 of the take-up spring 9. This double-point fixed limiting post 11 structure can significantly improve the structural stability of the second limiting groove 23 and prevent the second limiting segment 81 from loosening or shifting during rotation or under force. Therefore, this solution ensures that the take-up amplitude adjustment of the take-up spring 9 at different positions is more precise and stable, thereby improving the overall control accuracy and reliability of the wire clamp and avoiding yarn tension fluctuations caused by unstable limiting.

[0065] In some embodiments of this application, the embroidery machine uses a thread clamp to control the take-up amplitude of the take-up spring 9 by rotating an adjustment knob, and adjusts it in conjunction with the setting 50 on the thread clamp panel 2. However, in actual operation, the operator may find it difficult to intuitively and accurately determine the specific setting of the take-up amplitude of the take-up spring 9, and may also be unable to accurately adjust the take-up amplitude to the preset setting, thereby affecting the tension control accuracy of the embroidery thread and the embroidery quality.

[0066] In this regard, this application further proposes that the lower knob 14 is connected to a flexible paddle 31. The flexible paddle 31 is a mechanical component with a certain degree of flexibility, typically made of elastic materials such as spring steel, engineering plastics, or composite materials. Its main function is to provide a deformable mechanical contact or locking mechanism. The flexible paddle 31 can be integrally formed onto the lower knob 14, or it can be fixedly connected to the lower knob 14 at an appropriate position by riveting, screwing, or snap-fitting. Its shape and size are optimized to ensure smooth switching between gears 50 when rotating the adjustment knob, and to provide clear tactile feedback at each gear position.

[0067] The elastic lever 31 engages with the positions 50 on the cable clamp panel 2. This engagement refers to a mechanical interaction between the elastic lever 31 and the positions 50 on the cable clamp panel 2. When the adjustment knob is rotated, the elastic lever 31 moves along the trajectory of the positions 50, creating mechanical contact or engagement at each position 50. This engagement can be achieved by the tip or protrusion of the elastic lever 31 engaging with the groove of the position 50, or by the side of the elastic lever 31 contacting the protruding edge of the position 50 and generating a damping sensation. The positions 50 on the cable clamp panel 2 are preset positions or markings used to indicate different take-up amplitude states of the take-up spring 9. These positions 50 can be physical grooves, protrusions, holes, or marking lines, arranged at certain intervals, corresponding to different preset tensions or take-up amplitudes of the take-up spring 9.

[0068] Furthermore, depending on the position of the elastic lever 31 in conjunction with the gear position 50, the surface of the cable clamp panel 2 is provided with corresponding winding spring position markings 1. These markings 1 are visual indicators on the surface of the cable clamp panel 2, used to intuitively display the current winding amplitude of the winding spring 9. These markings 1 can be numbers, symbols, colored areas, or lines, and they correspond one-to-one with the gear positions 50 on the cable clamp panel 2.

[0069] Through the above technical solution, an elastic lever 31 is connected to the lower knob 14 and engages with the position 50 of the thread tensioner panel 2, achieving graded adjustment and precise mechanical positioning of the take-up spring 9's take-up amplitude. When the operator rotates the adjustment knob, the elastic lever 31 provides clear tactile feedback as it passes each position 50, allowing the operator to accurately perceive the knob's rotation position and precisely adjust the take-up amplitude to the desired level. Simultaneously, the take-up spring position scale 1 on the surface of the thread tensioner panel 2 corresponds to the position of the elastic lever 31 at each position 50, providing the operator with intuitive visual guidance. The operator can clearly understand the current take-up amplitude setting of the take-up spring 9 by observing the scale 1 without relying on experience or guesswork, thus ensuring the accuracy and consistency of embroidery thread tension adjustment. This design significantly improves the convenience, accuracy, and reliability of the embroidery machine's thread tensioner operation, contributing to improved embroidery product quality and production efficiency.

[0070] In some embodiments described above, the winding amplitude of the winding spring is controlled by rotating an adjustment knob. The winding spring rotates along with the knob, and the adjustment is coordinated with the settings on the wire clamp panel. However, ensuring the stable installation of the adjustment knob on the wire clamp panel and effectively limiting its rotation amplitude to accurately correspond to the preset settings, thereby avoiding misoperation or inaccurate adjustment, presents a technical challenge that requires further resolution.

[0071] In this regard, this application further proposes that the cable clamp panel 2 is provided with a third mounting hole 51 for mounting an adjustment knob. The adjustment knob is axially engaged with the limiting buckle 15 on the bottom surface of the cable clamp panel 2 by the axial elastic force of the spring tube 69 relative to the third mounting hole 51. At the same time, the adjustment knob is radially limited by the second limiting groove 55 on the side of the third mounting hole 51 relative to the third mounting hole 51, thus limiting the range of rotation of the adjustment knob.

[0072] Specifically, the cable clamp panel 2, as the main support structure of the cable clamp, is provided with a third mounting hole 51, which is used to accommodate and guide the installation of the adjustment knob. The size and shape of the third mounting hole 51 match the corresponding part of the adjustment knob, ensuring that the adjustment knob can be smoothly inserted and positioned. After installation, the axial position of the adjustment knob is fixed by the axial spring force generated by the spring tube 69. Specifically, when the spring tube 69 is compressed or pre-tightened, it generates an outward axial force, which pushes the limiting buckle 15 on the adjustment knob toward and engages it with the bottom surface of the cable clamp panel 2. The limiting buckle 15 is usually designed with a barb or flange structure, which can form a reliable engagement with the corresponding structure on the bottom surface of the cable clamp panel 2, thereby preventing the adjustment knob from loosening or falling off axially. In addition, the rotation range of the adjustment knob is radially limited to ensure that it can only be adjusted within a preset range. This limitation is achieved by a second limiting groove 55 provided on the side of the third mounting hole 51. The second limiting groove 55 is typically an arc-shaped or angled groove that engages with a protrusion or pin on the adjusting knob. When the adjusting knob is rotated, the limiting latch 15 moves radially within the second limiting groove 55. When it touches the end of the limiting groove, it prevents the adjusting knob from rotating further, thereby precisely controlling its rotation angle and preventing excessive twisting of the take-up spring 9.

[0073] Through the above technical solution, the third mounting hole 51 on the yarn clamp panel 2 provides a clear mounting position for the adjustment knob. The adjustment knob, through the axial elastic force of the spring tube 69, allows the limiting buckle 15 to axially engage with the bottom surface of the yarn clamp panel 2, thus achieving axial stability and effectively preventing axial loosening or disengagement due to vibration or external force during use. Simultaneously, the radial rotation amplitude of the adjustment knob is precisely limited by the second limiting groove 55 on the side of the third mounting hole 51, ensuring that the adjustment knob can only be rotated within the preset range, avoiding excessive rotation or misoperation. This improves the accuracy and reliability of yarn take-up amplitude adjustment, making operation more stable and convenient.

[0074] In some embodiments described above, a yarn clamp for an embroidery machine with yarn take-up amplitude control is proposed. Its yarn guide wheel device includes a yarn guide wheel 3, which is connected to a sensor 18 via a connecting rod 4. A yarn adjustment device is sleeved around the connecting rod 4, and the yarn adjustment device includes a take-up spring 9 and an adjustment knob. The adjustment knob is coordinated with the setting 50 of the clamp panel 2. Rotation of the adjustment knob controls the take-up amplitude of the take-up spring 9, and the take-up spring 9 rotates with the adjustment knob. However, in practical applications, ensuring that the connecting rod 4, sensor 18, yarn guide wheel 3, and adjustment knob form a stable and reliable integrated connection structure during rotation and axial force application, to avoid component loosening, displacement, or affecting the precise control of the yarn take-up amplitude, is a technical problem that needs to be solved.

[0075] In this application, a further embodiment of the aforementioned wire clamp is proposed, wherein the connecting rod 4 has a screw hole 22 at its connection end with the sensor 18, and the screw hole 22 is threadedly connected to a screw rod 16, which is fixedly connected to the sensor 18. The rod body of the connecting rod 4 passes through the first central positioning tube 7 and the second central positioning tube 19. The sensors 18 and the wire guide wheels 3 at both ends of the connecting rod 4 are located on both sides of the axial direction of the adjusting knob, and under the axial elastic force of the spring tube 69, the adjusting knob, the sensor 18, and the wire guide wheels 3 form an integral connection structure.

[0076] Specifically, the screw hole 22 at the connection end of the connecting rod 4 and the sensor 18 provides an adjustable and stable connection point. The screw hole 22 is typically an internal thread structure, capable of engaging with the external thread of the screw 16, achieving connection through threaded engagement. This connection method offers high strength and reliability, while allowing for fine-tuning of the axial position of the sensor 18 within a certain range to adapt to different assembly or calibration requirements. The screw 16, as a connector, is threaded to the screw hole 22 at one end and fixedly connected to the sensor 18 at the other end, which has position sensing capabilities. The connecting rod 4 passes through the first central positioning tube 7 and the second central positioning tube 19, a centrally guided and supported structural design. The first central positioning tube 7 is typically part of the upper knob 6, while the second central positioning tube 19 is part of the lower knob 14. The connecting rod 4 passing through these two positioning tubes ensures good coaxiality within the adjustment knob and provides stable radial support, preventing the connecting rod 4 from wobbling or shaking during rotation or axial force. This through-type design helps maintain the structural integrity and operational accuracy of the entire adjustment knob assembly. The sensors 18 and thread guide rollers 3 at both ends of the connecting rod 4 are located on opposite sides of the adjustment knob's axial direction, and under the axial elastic force of the Bourdon tube 69, the adjustment knob, sensors 18, and thread guide rollers 3 are integrally connected. This means that the thread guide roller 3 is located on one side of the adjustment knob, while the sensor 18 is located on the other side. The axial elastic force of the Bourdon tube 69, as part of the yarn adjustment device, is cleverly utilized to apply preload to the sensors 18 and thread guide rollers 3 located on either side of its axial direction. This preload tightly presses the adjustment knob, sensors 18, and thread guide rollers 3 together, forming an inseparable whole.

[0077] Through the above technical solution, the connecting rod 4 and the sensor 18 are connected by a threaded connection using a screw hole 22 and a screw 16, ensuring the connection's firmness and adjustability. Simultaneously, the rod body of the connecting rod 4 passes through the first center positioning tube 7 and the second center positioning tube 19, providing precise center positioning and stable radial support for the connecting rod 4, effectively preventing swaying during rotation and axial movement. Furthermore, by arranging the sensor 18 and the thread guide wheel 3 on opposite axial sides of the adjusting knob and pre-tightening them using the axial elasticity of the spring tube 69, the adjusting knob, sensor 18, and thread guide wheel 3 form a tightly integrated integral connection structure. This structural design significantly enhances the stability and reliability of the entire yarn take-up amplitude control device, effectively solving the problems of loosening and displacement that may occur during operation, thereby ensuring precise control of the yarn take-up amplitude and improving the embroidery quality and production efficiency of the embroidery machine. In addition, this integrated connection structure simplifies the assembly process and reduces maintenance difficulty.

[0078] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A thread take-up range level control thread gripper for embroidery machines, comprising a thread gripper panel (2) on which a thread guide wheel device is mounted, characterized in that: The overline wheel device comprises an overline wheel (3) connected with a sensor (18) through a connecting rod (4), the connecting rod (4) is peripherally sleeved with a yarn adjusting device, the yarn adjusting device comprises a take-up spring (9) and an adjusting knob, the adjusting knob is matched with a gear (50) of a thread tensioner panel (2), the adjusting knob rotationally controls the take-up amplitude of the take-up spring (9), and the adjusting knob is rotationally followed by the take-up spring (9).

2. The thread take-up range position control thread clamp for embroidery machine according to claim 1, wherein: The adjusting knob comprises an upper knob (6) and a lower knob (14), the take-up spring (9) is installed between the upper knob (6) and the lower knob (14), the take-up spring (9) comprises a first limiting section (10) integrally formed, an axially extended spring pipe (69), a second limiting section (81) and a thread hooking spring (8), the first limiting section (10) is arranged in an axial direction, the first limiting section (10) is integrally connected to form a coiled pipe-shaped spring pipe (69), the spring pipe (69) is further connected to a radial second limiting section (81), the second limiting section (81) is connected to a curved thread hooking spring (8), and the first limiting section (10) is matched with a clamping groove (13) in the lower knob (14).

3. The thread take-up range position control thread clamp for embroidery machine according to claim 2, characterized in that: The upper knob (6) comprises a first protrusion (5) and a first center positioning pipe (7), and a limiting protrusion (24) is arranged on the outer side of the first center positioning pipe (7); the lower knob (14) comprises a limiting buckle (15) and a second center positioning pipe (19), a limiting groove (20) matched with the limiting protrusion (24) and a clamping groove (13) matched with the first limiting section (10) are respectively arranged on the inner wall of the second center positioning pipe (19), and an annular mounting groove (44) for mounting the spring pipe (69) is arranged between the outer wall of the second center positioning pipe (19) and the lower knob (14).

4. The thread take-up range position control thread clamp for embroidery machine according to claim 2, wherein: The upper knob (6) is connected with the lower knob (14) through a connecting shaft (26) matched with a connecting hole of the lower knob (14), a second limiting groove (23) is arranged between the upper knob (6) and the lower knob (14), and the second limiting groove (23) is matched with the second limiting section (81) of the take-up spring (9).

5. A thread take-up range position control thread clamp for an embroidery machine according to claim 4, characterized in that: One end of the second limiting groove (23) is provided with a limiting column (11), one end of the limiting column (11) in the axial direction is connected with a first mounting hole (27) at the bottom of the first protrusion (5), and the other end is connected with a second mounting hole (12) on the upper side of the upper knob (6).

6. The thread take-up range position control thread clamp for embroidery machine according to claim 2, wherein: The lower knob (14) is connected with an elastic tab (31), the elastic tab (31) is matched with the gear (50) of the thread tensioner panel (2), and a take-up spring position scale (1) corresponding to the surface of the thread tensioner panel (2) is arranged according to the different positions of the elastic tab (31) matched with the gear (50).

7. The thread take-up range position control thread clamp for embroidery machine according to claim 1, wherein: The thread tensioner panel (2) is provided with a third mounting hole (51) for mounting the adjusting knob, the adjusting knob is axially matched with the third mounting hole (51), the spring pipe (69) is axially elastically connected between the adjusting knob and the third mounting hole (51), the limiting buckle (15) is axially clamped on the bottom surface of the thread tensioner panel (2) through the axial elastic force of the spring pipe (69), and the adjusting knob is radially matched with the third mounting hole (51), the second limiting groove (55) on the side of the third mounting hole (51) limits the rotation amplitude of the adjusting knob.

8. The thread take-up range position control thread clamp for embroidery machine according to claim 1, wherein: The connecting rod (4) is provided with a screw hole (22) at the connecting end of the sensor (18), the screw hole (22) is threadedly connected with a screw rod (16), the screw rod (16) is fixedly connected with the sensor (18), the rod body of the connecting rod (4) penetrates through the first central positioning pipe (7) and the second central positioning pipe (19), and the sensor (18) and the wire passing wheel (3) at the two ends of the connecting rod (4) are respectively located on the two sides of the adjusting knob in the axial direction, and under the axial elastic force of the spring pipe (69), the adjusting knob, the sensor (18) and the wire passing wheel (3) are integrated.

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