Method for realizing plain embroidery at rope embroidery needle position of embroidery machine

Abstract

The invention discloses a method for realizing plain embroidery at a rope embroidery needle position of an embroidery machine, relates to an embroidery technology, and solves the problem that plain embroidery cannot be realized at the rope embroidery needle position. The step of carrying out plain embroidery at the rope embroidery needle position comprises the following steps: before plain embroidery operation, a lifting assembly drives a rope swinging mechanism to descend to a first height, a rope swinging driving motor drives a looping head body to swing to an avoiding angle, and at the avoiding angle, a rope is located on one side of the radial center line of a center through hole so as to be staggered from an embroidery needle, and a universal presser foot is staggered from the rope; the needle bar corresponding to the rope embroidery needle position is matched with the universal presser foot to perform plain embroidery operation; and after the plain embroidery operation is completed, the lifting assembly drives the rope swinging mechanism to rise to a second height, then the thread hooking mechanism hooks the thread, and the thread trimming mechanism trims the upper thread and the lower thread.

Description

Technical Field

[0001] This invention belongs to the technical field of embroidery equipment, specifically relating to an embroidery machine equipped with a rope embroidery device. Background Technology

[0002] Existing multi-color rope embroidery devices, when installed in conjunction with embroidery machines, not only enable rope embroidery in various colors and sizes, but also, through further optimization of program matching, retain the flat embroidery function inherent in the embroidery machine while completing the rope embroidery function at the designated needle position.

[0003] Currently available rope embroidery devices, when combined with embroidery machines, allow the device to deliver the rope to the needle and swing it left and right during operation. Under the action of the needle and thread, the rope is fixed to the fabric, forming a beautiful pattern according to the design, thus completing its rope embroidery function.

[0004] However, because it is equipped with a rope embroidery device, this needle position loses its original flat embroidery function in addition to the rope embroidery function. This is because if the rope embroidery needle position on the market is selected for flat embroidery, the rope embroidery device will automatically rise to its highest point and enter a dormant state. At this time, when the needle bar moves up and down, if the presser foot required for flat embroidery is installed on the needle bar, the presser foot will collide with the rope embroidery device. In severe cases, this can lead to damage to the rope embroidery device and the embroidery machine. Therefore, the rope embroidery device on the market, after being installed on the embroidery machine, is not allowed to perform flat embroidery on the rope embroidery needle position. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a method for performing flat embroidery at the cord embroidery needle position on an embroidery machine, thereby solving the problem that flat embroidery cannot be performed at the cord embroidery needle position.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine. The embroidery machine head includes a machine head housing and a needle bar frame laterally slidably mounted on the machine head housing. A thread hooking mechanism and a thread cutting mechanism are mounted on the machine head housing. A row of needle bars is arranged laterally on the needle bar frame. A cord embroidery device is mounted on the side of the needle bar frame. The cord embroidery device includes a cord swinging mechanism and a lifting assembly. The cord swinging mechanism includes a cord swing component and a cord swinging drive motor. The cord swing component includes a cord swing seat and at least one loop head assembly disposed on the cord swing seat. The loop head assembly includes a loop head body with a central through hole. The lower part of the loop head body has a cord threading hole circumferentially outside the central through hole. The loop head body rotates to cause the cord passing through the cord threading hole to swing. The cord swinging drive motor drives the loop head body to swing. The lifting assembly drives the cord swinging mechanism to rise and fall. The lifting assembly is used to drive the cord swinging mechanism to switch between a first height and a second height before and after flat embroidery operations, with the second height being higher than the first height. The needle bar corresponding to the cord embroidery needle position is connected to a universal presser foot that can rise and fall along the needle bar. The following steps are involved in flat embroidery at the rope embroidery stitch position: Before the flat embroidery operation, the lifting component drives the rope swinging mechanism to descend to the first height, and the rope swinging drive motor drives the ring head body to swing to the avoidance angle. At the avoidance angle, the rope is located on one side of the radial center line of the central through hole, thus offset from the embroidery needle, and the universal presser foot is offset from the rope. The needle bar corresponding to the rope embroidery needle position and the universal presser foot are used to perform flat embroidery operations; After the flat embroidery is completed, the lifting component drives the swing rope mechanism to rise to the second height, then the hooking mechanism hooks the thread, and the thread cutting mechanism cuts the upper and lower threads.

[0007] Preferably, the first height is 4-6 mm; and / or, the second height is 20-30 mm.

[0008] Preferably, the universal presser foot includes a presser foot portion extending vertically, which passes vertically through a central through hole during embroidery, the presser foot portion being offset from the center of the central through hole, and the bottom of the presser foot portion having a pressing fabric surface.

[0009] Preferably, the cross-section of the presser foot is arc-shaped.

[0010] Preferably, the cross-section of the presser foot is of a slightly curved shape, and the presser foot is located on one side of the radial center line of the central through hole during the embroidery process.

[0011] Preferably, the universal presser foot further includes a connecting part, which is L-shaped and includes a vertical section and a horizontal section connected to the bottom end of the vertical section. The upper end of the presser foot is connected to the horizontal section, and the vertical section is connected to the presser foot driving structure.

[0012] Preferably, the presser foot drive structure includes a presser foot sleeve and a presser foot spring movably nested on the needle bar. The needle bar is connected to a needle bar drive block. The presser foot sleeve is located below the needle bar drive block. The presser foot spring is located between the needle bar drive block and the presser foot sleeve. The upper end of the vertical section is connected to the presser foot sleeve. When the needle bar descends, the needle bar drive block presses down on the presser foot spring. The presser foot spring exerts a downward force on the presser foot sleeve, thereby driving the universal presser foot to descend.

[0013] Preferably, the bottom of the needle bar holder is provided with a bottom beam, the bottom beam is provided with a needle bar through hole that cooperates with the needle bar, and the top of the bottom beam is provided with a presser foot downward stop surface, which cooperates with the presser foot sliding sleeve for limiting when the presser foot surface presses the fabric.

[0014] Preferably, the front side of the bottom beam is provided with a sliding groove, and the vertical section slides in conjunction with the sliding groove.

[0015] Preferably, the horizontal section is located below the bottom beam, and the embroidery needle is nested with a needle sleeve. The needle sleeve is connected to a limiting pin, which cooperates with the horizontal section when the needle bar moves upward and drives the presser foot to return to its original position.

[0016] The technical solution adopted in this invention has the following beneficial effects: When the flat embroidery function is selected for the rope embroidery needle position, the lifting component drives the rope swinging mechanism to descend to the first height through program control, avoiding the collision point that occurs when the presser foot moves. At the same time, the loop head body of the rope embroidery device is controlled to actively shift to the avoidance angle. At the avoidance angle, the rope is located on one side of the radial center line of the central through hole, thus offsetting from the embroidery needle to avoid the embroidery needle pricking the rope when moving up and down.

[0017] In addition, after the flat embroidery is completed, the rope embroidery device will actively cooperate with the lifting and lowering of its needle bar to rise to the second height, providing space for the hooking mechanism to hook the thread, thereby completing its automatic cutting of the upper and lower threads of the flat embroidery, thus solving the problem that flat embroidery cannot be done at the rope embroidery needle position.

[0018] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0019] The invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the multi-color rope embroidery device installed on the head of a flat embroidery machine. Figure 2 This is a schematic diagram of the structure of a multi-colored rope embroidery device. Figure 1 ; Figure 3 This is a schematic diagram of the structure of a multi-colored rope embroidery device. Figure 2 ; Figure 4 This is a structural diagram of the rope-swinging component in a multi-color rope embroidery device; Figure 5 This is a schematic diagram of the structure of a multi-colored rope embroidery device. Figure 3 ; Figure 6 This is a schematic diagram of the rope clamping mechanism of a multi-colored rope embroidery device. Figure 1 ; Figure 6a yes Figure 6 Schematic diagram of a local structure in the middle; Figure 7 This is a schematic diagram of the rope clamping mechanism of a multi-colored rope embroidery device. Figure 2 ; Figure 7a yes Figure 7 Schematic diagram of a local structure in the middle; Figure 8 This is a schematic diagram of the rope clamping mechanism of a multi-colored rope embroidery device. Figure 3 ; Figure 9 This is a schematic diagram of the cooperation structure between the rope clamping mechanism and the rope cutting mechanism of the multi-color rope embroidery device; Figure 10 This is a schematic diagram of the cooperation structure between the multi-color rope embroidery device and the embroidery machine head; Figure 11 This is a partial structural diagram of 10; Figure 12 This is a diagram illustrating how the presser foot avoids the rope during flat embroidery stitching at an angle. Figure 13 This is a schematic diagram of the rope embroidery needle position selection flat embroidery function rope swaying mechanism after descending to the first height; Figure 14 This is a schematic diagram of the structure after the rope-lifting mechanism rises to the second height after the flat embroidery work is completed; Reference numerals: 1. Swinging rope mechanism; 100. Swinging rope seat; 1011. Seat body; 1012. Loop head mounting hole; 1013. Top cover; 111. First swinging rope drive motor; 112. First transmission pulley; 113. First transmission synchronous belt; 114. Second transmission pulley; 115. Third transmission pulley; 116. Second transmission synchronous belt; 117. First swinging rope synchronous belt; 118. First loop head assembly; 119. First swinging rope pulley; 1191. Second swinging rope drive motor; 121. Fourth transmission pulley; 122. Third transmission synchronous belt; 123. Second transmission synchronous belt; 124. Second swinging rope. Synchronous belt 125, first expanding synchronous pulley 126, second loop head assembly 127, second swing rope pulley 1271; third swing rope drive motor 131, fifth transmission pulley 132, fourth transmission synchronous belt 133, third transmission synchronous pulley 134, third swing rope synchronous belt 135, second expanding synchronous pulley 136, third loop head assembly 137, loop head body 1370, center through hole 13701, third swing rope pulley 1371, rope hole 1372, rope 13721, bearing inner ring 1373, cage 1374, bearing ball 1375, limiting protrusion ring 1376; 2. Rope support bracket; 211. First rope feeding motor; 212. First rope passing spring; 213. First color rope tensioning mechanism; 221. Second rope feeding motor; 222. Second rope passing spring; 223. Third rope feeding motor; 231. Third rope passing spring; 233. Third color rope tensioning mechanism; 3. Lifting assembly; 31. Lifting cylinder; 32. Lifting guide rail; 4. Embroidery machine head; 41. Machine head housing; 42. Needle bar holder; 421. Needle bar; 422. General presser foot; 423. Presser foot sleeve; 4231. Connector; 4232. Vertical section; 42321. Horizontal section; 42322. Presser foot part; 4233. Needle bar drive block; 424. Presser foot spring; 425. Bottom beam; 426. Presser foot downward stop surface; 4261. Slide groove; 4262. Needle sleeve; 427. Limit pin; 428. The system includes: a rope clamping mechanism 5, a rope clamping and releasing motor 51, a connecting sleeve 511, a lever support frame 512, a three-color rope clamping assembly 52, a first rope clamping assembly 521, a first drive link 5211, a first return torsion spring 5212, a first small link 5213, a first translation link 5214, a first guide groove 52141, a first push-pull link 5215, a first rope clamping hook 5216, a first rope clamping post 5217, a second rope clamping assembly 522, a second drive link 5221, a second return torsion spring 5222, a second small link 5223, a second translation link 5224, a second push-pull link 5225, and a second rope clamping hook 5226. The following components are included: second rope clamping post 5227, third rope clamping assembly 523, third drive link 5231, third reset torsion spring 5232, third small link 5233, third translation link 5234, third tail end side extension 52341, third head end side extension 52342, third push-pull link 5235, third rope clamping hook 5236, third rope clamping post 5237, lever 55, rotating part 551, actuating part 552, color changing drive structure 56, rope clamping color changing motor 561, lead screw nut 562, lead screw support seat 563, color changing slider 564; rope cutting mechanism 6, hooking mechanism 7, needle plate 8. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0021] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0022] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "lateral," and "longitudinal," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0026] like Figure 1 As shown, a multi-color rope embroidery device is installed on the head 4 of a conventional flat embroidery machine, thus forming the head of the rope embroidery machine. A needle plate 8 is provided below the head 4. Correspondingly, the rope embroidery machine includes one or more heads 4. The head includes a head housing 41 and a needle bar frame 42 that is laterally slidably installed on the head housing. A row of needle bars 421 is arranged laterally on the needle bar frame 42, and embroidery needles 422 are connected to the bottom of the needle bars. Specifically, the multi-color rope embroidery device is installed on the side of the needle bar frame, including a rope swing bracket 2 and a fixed bracket. The rope swing bracket 2 is provided with a rope swing mechanism 1, which includes a rope swing component. The rope swing component includes a laterally extending rope swing seat 100 and at least two loop head assemblies arranged side by side along the extension direction of the rope swing seat. The loop head assemblies are rotatably connected to the rope swing seat 100. The rope swing seat 100 extends laterally in front of the needle bar frame so that multiple loop head assemblies are located under multiple embroidery needles, so that one loop head assembly corresponds to one embroidery needle.

[0027] The spacing between two adjacent loop-forming head assemblies is fixed, and the spacing between two adjacent loop-forming head assemblies is equal to the spacing between the two needle bars on the corresponding embroidery machine head.

[0028] A fixed bracket is fixed to the side of the needle bar frame. A lifting assembly 3 is provided between the swing rope bracket and the fixed bracket. The lifting assembly 3 is used to drive the swing rope bracket to rise and fall. The lifting assembly 3 includes a lifting cylinder 31 and a lifting guide rail 32 located between the swing rope bracket and the fixed bracket. The push rod of the lifting cylinder is connected to the swing rope bracket, and the lifting cylinder drives the swing rope bracket to rise and fall.

[0029] The loop-making head assembly includes a loop-making head body 1370, which is a ring-shaped body with a central through hole 13701 for the embroidery needle to pass through. The lower part of the loop-making head body has a rope-passing hole 1372 on the circumferential outer side of the central through hole.

[0030] Taking the three-color rope embroidery as an example, the first loop head body is provided with a first rope hole for the first color rope to pass through, the second loop head body is provided with a second rope hole for the second color rope to pass through, and the third loop head body is provided with a third rope hole for the third color rope to pass through.

[0031] To drive at least two (color) ringing head assemblies to oscillate, existing technologies employ a single oscillating rope drive motor, which drives the assemblies via a belt drive mechanism. Specific solutions typically fall into two categories: one where the oscillating rope drive motor drives a main synchronous belt pulley, which in turn drives multiple ringing heads to oscillate as it passes through its corresponding synchronous belt; the other involves a color-changing structure, where changing colors causes the oscillating rope drive motor to drive the corresponding ringing head to oscillate. In the first method, multiple ringing heads are always in an oscillating state; in the second method, the added color-changing structure results in less stable transmission.

[0032] To address the aforementioned issues, in this embodiment, the swing rope mechanism further includes at least two swing rope drive components corresponding to at least two loop-forming head assemblies. Each swing rope drive component includes a swing rope drive motor and a timing belt assembly. Specifically, one swing rope drive motor is provided for each loop-forming head assembly, and each motor drives one loop-forming head assembly to swing. A timing belt assembly connects each motor to its corresponding loop-forming head assembly. Therefore, each swing rope drive motor can precisely control the swing speed and angle of the loop-forming head assembly, and the timing belt assembly maintains precise synchronization between each motor and its corresponding assembly, ensuring precise and stable swinging of each loop-forming head assembly.

[0033] like Figures 1 to 5 As shown, in this embodiment, the three-color rope embroidery is still used as an example for explanation. Three loop-making head components are correspondingly provided: the first loop-making head component 119, the second loop-making head component 127, and the third loop-making head component 137. Therefore, three swing rope drive components are correspondingly provided: the first swing rope drive component, the second swing rope drive component, and the third swing rope drive component.

[0034] The first swing rope drive assembly includes a first swing rope drive motor 111, a first transmission pulley 112, a second transmission pulley 114, a third transmission pulley 115, a first transmission synchronous pulley 117, a first transmission synchronous belt 113, a second transmission synchronous belt 116, a first swing rope synchronous belt 118, and a first swing rope pulley 1191. The first swing rope drive motor 111 drives the first transmission pulley 112, which in turn drives the second transmission pulley 114 via the first transmission synchronous belt 113. The second transmission pulley 114 and the third transmission pulley 115 are coaxially arranged and synchronously driven. The third transmission pulley 115 drives the first transmission synchronous pulley 117 via the second transmission synchronous belt 116, and the first transmission synchronous pulley 117 drives the first swing rope pulley 1191 via the first swing rope synchronous belt 118. The first swing rope pulley 1191 is located on the first loop head assembly 119, thus enabling the swing rope of the first loop head assembly 119 through the first swing rope drive assembly.

[0035] The second swing rope drive assembly includes a second swing rope drive motor 121, a fourth transmission pulley 122, a second transmission synchronous pulley 124, a third transmission synchronous belt 123, a second swing rope synchronous belt 125, and a second swing rope pulley 1271. The second swing rope drive motor 121 drives the fourth transmission pulley 122, which in turn drives the second transmission synchronous pulley 124 via the third transmission synchronous belt 123. The second transmission synchronous pulley 124 then drives the second swing rope pulley 1271 via the second swing rope synchronous belt 125. The second swing rope pulley 1271 is mounted on the second looping head assembly 127, thus enabling the swing rope movement of the second looping head assembly 127 through the second swing rope drive assembly.

[0036] The third swing rope drive assembly includes a third swing rope drive motor 131, a fifth transmission pulley 132, a third transmission synchronous pulley 134, a fourth transmission synchronous belt 133, a third swing rope synchronous belt 135, and a third swing rope pulley 1371. The third swing rope drive motor 131 drives the fifth transmission pulley 132, which in turn drives the third transmission synchronous pulley 134 via the fourth transmission synchronous belt 133. The third transmission synchronous pulley 134 then drives the third swing rope pulley 1371 via the third swing rope synchronous belt 135. The third swing rope pulley 1371 is mounted on the third looping head assembly 137, thus enabling the swing rope mechanism of the third looping head assembly 137.

[0037] Specifically, such as Figure 5As shown, the first oscillating rope pulley 1191, the second oscillating rope pulley 1271, the third oscillating rope pulley 1371, and the first transmission synchronous pulley 117, the second transmission synchronous pulley 124, and the third transmission synchronous pulley 134 are arranged in a straight line along the transverse direction. Furthermore, the first oscillating rope pulley, the second oscillating rope pulley, and the third oscillating rope pulley are arranged sequentially from the middle to one side of the transverse direction, while the first transmission synchronous pulley, the second transmission synchronous pulley, and the third transmission synchronous pulley are arranged sequentially from the middle to the other side of the transverse direction.

[0038] Furthermore, the swing rope seat 100 is provided with a loop head mounting part corresponding to the above-mentioned loop head assembly mounting position, and the loop head assembly is installed at the middle position of the width of the loop head mounting part.

[0039] In existing technical solutions, the pulley that drives the oscillating rope pulley is located on one side of its longitudinal direction, resulting in a relatively large loop holder. This makes it difficult for the embroidery operator to bring their hand, which is holding the thread end, close to the embroidery needle hole, hindering threading. In this embodiment, the first, second, and third transmission synchronous pulleys are longitudinally staggered with the first, second, and third oscillating rope pulleys, forming a horizontally arranged linear structure. The width of the oscillating rope holder at the corresponding positions of the first, second, and third oscillating rope pulleys is only slightly larger than the width of the loop holder assembly. Compared to existing synchronous belt drive methods, this reduces the width of the loop holder mounting portion, allowing the embroidery operator to bring their hand, holding the thread end, closer to the embroidery needle hole, facilitating threading.

[0040] To avoid interference in the vertical direction, the second transmission synchronous belt 116, the third transmission synchronous belt 123, and the fourth transmission synchronous belt 133 are staggered in the vertical direction. Correspondingly, the first transmission synchronous pulley 117, the second transmission synchronous pulley 124, and the third transmission synchronous pulley 134 are at different heights. In this way, within a limited space, the three sets of synchronous belt drive structures do not interfere with each other.

[0041] Because the first swing rope pulley 1191, the second swing rope pulley 1271, and the third swing rope pulley 1371 are arranged in a line and at the same height, a first expanding synchronizer pulley 126 and a second expanding synchronizer pulley 136 are provided to avoid interference between the first swing rope synchronous belt 118, the second swing rope synchronous belt 125, and the third swing rope synchronous belt 135, as well as interference with other components. Specifically, the second swing rope drive assembly also includes the first expanding synchronizer pulley 126, which allows the second swing rope synchronous belt 125 to avoid the first transmission synchronizer pulley, the first swing rope synchronous belt, and the first swing rope pulley. The third swing rope drive assembly also includes the second expanding synchronizer pulley 136, which allows the third swing rope synchronous belt 135 to avoid the first expanding synchronizer pulley, the first transmission synchronizer pulley, the second transmission synchronizer pulley, the first swing rope synchronous belt, the second swing rope synchronous belt, and the first and second swing rope pulleys. The first expanding synchronous pulley 126 is located to the side at the midpoint between the first and second transmission synchronous pulleys to expand the second swing rope synchronous belt outwards. The second expanding synchronous pulley 136 is located to the side at the midpoint between the second and third transmission synchronous pulleys to expand the third swing rope synchronous belt outwards.

[0042] Furthermore, at least two rope drive motors are arranged in a straight line along the longitudinal direction, and are of the same model. Their axes are perpendicular to the horizontal plane and they are set at the same height. The first rope drive motor 111 is located on the side away from the rope seat, the second rope drive motor 121 is located on the side closer to the rope seat, and the third rope drive motor 131 is located between the first rope drive motor 111 and the second rope drive motor 121. This is because the lateral space between two adjacent embroidery machine heads is small, and since a multi-color rope embroidery device is installed, the lateral width of the multi-color rope embroidery device must be minimized. The arrangement of at least two rope drive motors in a straight line along the longitudinal direction can minimize the increase in the lateral width of the multi-color rope embroidery device. Based on the above design, in order to achieve transmission with the three looping head assemblies, the output shafts of the second and third oscillating rope drive motors 121 and 131 extend downwards beyond the output shaft of the first oscillating rope drive motor 111, or are connected to an extended shaft via a coupling, and then connected to the fourth and fifth transmission pulleys 122 and 132, with the fourth transmission pulley 122 being lower than the fifth transmission pulley 132. Simultaneously, the second and third transmission pulleys 114 and 115 are coaxially arranged vertically, with the second transmission pulley 114 at the same height as the first transmission pulley 112, and the third transmission pulley 115 lower than the fourth transmission pulley 122.

[0043] In addition, the multi-color rope embroidery device is equipped with at least two-color rope embroidery components corresponding to at least two loop-forming head assemblies. Each color rope embroidery component feeds a corresponding color rope to each loop-forming head assembly and keeps the rope passing through the loop-forming head assembly taut. In this embodiment, three-color rope embroidery components are provided corresponding to the three-color loop-forming head assemblies, namely, a first-color rope embroidery component, a second-color rope embroidery component, and a third-color rope embroidery component, and the first-color rope embroidery component, the second-color rope embroidery component, and the third-color rope embroidery component have the same structure.

[0044] The first-color rope embroidery assembly includes a first-color rope feeding / receiving mechanism, a first rope-passing spring 212, and a first-color swaying rope tensioning mechanism 213. The first-color rope feeding / receiving mechanism typically uses two rope feeding / receiving wheels to hold the rope for feeding and releasing, with one of the wheels driven by a first rope feeding / receiving motor 211. That is, the first-color rope feeding / receiving mechanism includes a first rope feeding motor 211 and a first rope feeding / receiving wheel assembly. When the first loop head assembly rotates, the first-color swaying rope tensioning mechanism pulls the first-color rope, keeping it taut at the first loop head. The first-color rope is introduced through the inlet of the first rope feeding / receiving wheel assembly, passes through the first rope-passing spring 212, then through the first-color swaying rope tensioning mechanism, and finally enters the rope-passing hole of the first-color loop head assembly.

[0045] The first-color rope tensioning mechanism includes a first-color rope guide frame movably connected to the rope support and a first rope spring connected between the rope support and the first-color rope guide frame. The first-color rope guide frame has a rope guide rod, one end of which is connected to a pin mounted on the rope support. The other end of the rope guide rod is connected to a rope loop through which the rope passes. The first rope spring is a torsion spring that drives the first-color rope guide frame to twist, thus tensioning the rope.

[0046] The second-color rope embroidery assembly has the same structure as the first-color rope embroidery assembly. It includes a second-color rope feeding / unfeeding mechanism, a second rope-passing spring 222, and a second-color rope-swinging tensioning mechanism 223. The second-color rope feeding / unfeeding mechanism is equipped with a second rope feeding / unfeeding motor 221 and a second rope feeding / unfeeding wheel assembly. The third-color rope embroidery assembly includes a third-color rope feeding / unfeeding mechanism, a third rope-passing spring 232, and a third-color rope-swinging tensioning mechanism 233. The third-color rope feeding / unfeeding mechanism is equipped with a third rope feeding / unfeeding motor 231 and a third rope feeding / unfeeding wheel assembly.

[0047] The existing multi-color rope embroidery device is designed with a rope clamping mechanism in conjunction with the rope cutting mechanism. The rope clamping mechanism is installed on the back side of the thread clamp. Its function is that when one cycle of rope embroidery is completed, the rope cutting mechanism cuts the rope from the fabric and fixes it on the rope clamping mechanism. When the next cycle of embroidery begins, the rope can be used for the next cycle of rope embroidery.

[0048] Existing cord clamping mechanisms can be used on regular single-color cord embroidery or two-color cord embroidery with interlaced needles, but for three-color cord embroidery devices or structures with more colors, the spacing between the cord pulleys is only 15 mm. If the three cords with a 15 mm spacing are fixed one by one, the existing cord clamping mechanisms are difficult to complete in terms of space.

[0049] like Figures 6 to 9 As shown, in this embodiment, the rope clamping mechanism 5 includes a rope clamping and releasing motor 51, at least two rope clamping components corresponding to at least two looping head components, and a color-changing drive structure 56, which includes a rope clamping and color-changing motor 561.

[0050] Each loop-making head assembly is equipped with a corresponding rope clamping assembly. Therefore, multi-color rope embroidery is equipped with at least two rope clamping assemblies. When the loop-making head assembly is not working, the corresponding rope clamping assembly clamps the rope. When the loop-making head assembly of that color needs to work, the rope clamping release motor drives the corresponding rope clamping assembly to release the rope.

[0051] Due to space constraints, it's not feasible to install a separate rope-clamping and releasing motor for each rope-clamping assembly. Therefore, only one rope-clamping and releasing motor is used, employing a rope-clamping color-changing motor to drive the movement of the rope-clamping and releasing motor to change colors. Before changing colors, the releasing motor drives one rope-clamping assembly to release the rope; after changing colors, it drives the other rope-clamping assembly to release the rope. This saves space and allows for the arrangement of multi-color rope-clamping mechanisms within a limited space.

[0052] In this embodiment, the rope clamping assembly includes a hinged rope clamping hook, a rope clamping connecting rod component that drives the rope clamping hook to rotate for clamping and resetting the rope, and a rope clamping post that cooperates with the rope clamping hook to clamp the rope. The rope clamping hook and the rope clamping post are located on one longitudinal side of the corresponding loop-forming head assembly (with the rope swing seat located at the front of the embroidery machine head as a reference, the rope clamping hook and the rope clamping post are located at the rear of the rope swing seat). Since the rope clamping hook and the rope clamping post are located on one longitudinal side of the corresponding loop-forming head assembly, the rope clamping hooks and rope clamping posts of multiple rope clamping assemblies are spaced apart on the sides of multiple loop-forming head assemblies, which is easy to implement in terms of space, does not occupy much longitudinal space, and each rope clamping hook is also spaced apart from the corresponding rope clamping post when clamping the rope, so they do not interfere with each other.

[0053] Specifically, the rope clamping linkage component includes a drive linkage hinged to a drive pin and a return torsion spring mounted on the drive pin and connected to the drive linkage. The drive linkage is located on one side of the swing rope seat, and the drive linkages of at least two rope clamping assemblies are arranged side by side in the longitudinal direction. The upper end of the drive linkage is provided with a driven part, which receives the driving force of the rope clamping and releasing motor to realize the swing of the drive linkage. Since the lateral space between two adjacent machine heads is limited, the lateral space of the corresponding ring-forming head seat is restricted. Therefore, the drive linkages of at least two rope clamping assemblies are arranged side by side in the longitudinal direction. At the same time, the rope clamping and releasing motor and the rope clamping and color-changing motor are located on one side of the longitudinal direction of the drive linkage, and the rope clamping and releasing motor is located close to the drive linkage. This allows the rope clamping and releasing motor and the rope clamping and color-changing motor to be arranged in the longitudinal direction. The rope clamping and color-changing motor drives the rope clamping and releasing motor to slide in the longitudinal direction to change colors, saving lateral space. Because the drive linkage is connected to the reset torsion spring, the reset torsion spring exerts a force on the rope clamping assembly, which clamps the rope when the loop head assembly is not in operation.

[0054] Preferably, the rope-clamping release motor and the rope-clamping color-changing motor are located on the longitudinal side of the drive link, with the rope-clamping release motor positioned close to the drive link. The rope-clamping color-changing motor drives the rope-clamping release motor to slide longitudinally for color changing. The push-pull link can be pushed and pulled laterally, thereby causing the rope-clamping hook to loosen the rope through the pulling action of the push-pull link.

[0055] Furthermore, the rope clamping linkage component also includes a push-pull linkage, which is located on one longitudinal side of the swing rope seat, and its head end is hinged to the rope clamping hook. The rope clamping linkage component also includes a translation linkage and a small linkage. One end of the small linkage is hinged to the lower end of the drive linkage, and the other end is hinged to the tail end of the translation linkage. The translation linkage translates under the swing rope seat and has a guide groove. The lower side of the swing rope seat has a guide pin, and the guide groove cooperates with the guide pin. Alternatively, guide balls can be provided on the guide pin to roll in cooperation with the guide groove. The translation link includes a horizontally extending planar extension, a head-end side extension extending upward from the head side of the planar extension, and a tail-end side extension extending upward from the tail side of the planar extension. The planar extension is located below the swing rope seat. The tail-end side extension is located on the lateral side of the swing rope seat and is hinged to the small connecting rod. The head-end side extension is located on the longitudinal side of the swing rope seat and is hinged to the push-pull link. The translation link moves below the swing rope seat, thus not occupying lateral or longitudinal space. Because the translation link has a guide groove and the swing rope seat has a guide pin, the guide groove and guide pin cooperate to ensure that the translation link does not misalign during lateral translation. The translation link has a planar extension, a head-end side extension, and a tail-end side extension. Because the planar extension is located below the swing rope seat, the planar extensions of multiple translation links can be staggered in the height and longitudinal directions, thus allowing for arrangement within a limited space. Since the tail end side extension is located on the lateral side of the swing rope seat and is hinged to the small connecting rod, and the head end side extension is located on the longitudinal side of the swing rope seat and is hinged to the push-pull connecting rod, the space under the swing rope seat can be effectively utilized while ensuring that the translation connecting rod is connected to the small connecting rod and the push-pull connecting rod.

[0056] Specifically, in this embodiment, the cord clamping mechanism, corresponding to the three-color cord embroidery, is provided with a three-color cord clamping assembly 52, namely, a first cord clamping assembly 521, a second cord clamping assembly 522, and a third cord clamping assembly 523. Specifically, the first cord clamping assembly 521 includes a first drive link 5211, a first return torsion spring 5212, a first small link 5213, a first translation link 5214, a first push-pull link 5215, a first cord clamping hook 5216, and a first cord clamping post 5217. The second cord clamping assembly 522 includes a second drive link 5221, a second return torsion spring 5222, a second small link 5223, a second translation link 5224, a second push-pull link 5225, a second cord clamping hook 5226, and a second cord clamping post 5227. The third rope clamping assembly 523 includes a third drive link 5231, a third reset torsion spring 5232, a third small link 5233, a third translation link 5234, a third push-pull link 5235, a third rope clamping hook 5236, and a third rope clamping post 5237. For example... Figure 8As shown, taking the third rope clamping assembly 523 as an example, the third translation link 5234 is provided with a third head end side extension 52342 and a third tail end side extension 52341. Taking the first rope clamping assembly 521 as an example, the first translation link 5214 is provided with a first guide groove 52141, and the swing rope seat is provided with a first guide pin, which guides and cooperates with the first guide groove 52141.

[0057] The rope-releasing motor 51 drives the lever 55 to actuate the rope-clamping linkage component. The lever 55 has a deflecting part 552 that interacts with the rope-clamping linkage component and a rotating part 551 connected to the rope-releasing motor. The deflecting part 552 is offset from the rotation center of the rotating part 551. Therefore, after the rope-releasing motor drives the lever to rotate, the deflecting part swings, which can drive the rope-clamping linkage component to move, thereby loosening the rope. A connecting part is provided between the deflecting part and the rotating part, making the lever 55 as a whole Z-shaped component. A lever support frame 512 is fixed on the rope-releasing motor 51. The rotating part 551 is rotatably supported on the lever support frame 512 and connected to the motor shaft of the rope-releasing motor 51 through a connecting sleeve 511. This ensures that the lever swings around the rotating part.

[0058] To ensure color-changing accuracy, a lead screw and nut assembly is provided between the rope-clamping color-changing motor 561 and the rope-clamping and releasing motor 51. The lead screw and nut assembly includes a lead screw and nut 562 and a lead screw support 563, wherein the nut is threadedly connected to the lead screw and connected to the color-changing slider 564. Furthermore, the rope-clamping color-changing motor 561 is mounted on the color-changing slider, which slides in conjunction with the color-changing slide rail. Therefore, when the rope-clamping color-changing motor drives the rope-clamping and releasing motor to slide longitudinally for color changing, the displacement of the rope-clamping and releasing motor can be ensured to be precise and the color changing is completed accurately.

[0059] The aforementioned swing rope mechanism 1 and the corresponding rope clamping mechanism 5 are installed on the swing rope support and move up and down with the swing rope support.

[0060] The entire rope clamping mechanism is installed on the multi-color rope embroidery device, and its working principle is as follows: When a certain color position of the multi-color rope embroidery device finishes working, the rope clamping assembly for that color position will automatically open the rope clamping hook. Then, the rope guide pulley for that color position will automatically turn the rope threading hole toward the rope clamping hook. At this time, the embroidery frame will pull the rope fixed between the fabric and the rope guide pulley toward the rope clamping hook position corresponding to the rope threading hole of the rope guide pulley, until the rope clamping hook can hook the rope when it is retracted. After the rope clamping hook is retracted, it will fix the rope that is threaded into the rope threading hole of the rope guide pulley. Then, the rope cutting mechanism 6 installed on the rear side of the embroidery machine housing (see...) Figure 9 The person in charge is responsible for cutting the rope fixed to the end of the fabric. At this point, the cycle of the pattern ends, and the frame can be moved or the color changed to start the next cycle of the pattern.

[0061] The first rope clamping assembly operates as follows: The rope clamping and color-changing motor drives the lead screw to rotate, which in turn drives the color-changing slider to move along the color-changing guide rail via the nut. This, in turn, drives the rope clamping and loosening motor and the lever to move longitudinally, moving the lever to a position where it can drive the first drive linkage. At this point, when the rope clamping and loosening motor drives the lever to rotate, the lever actuates the first drive linkage. The first drive linkage drives the first small linkage and the first translation linkage, which in turn drives the first push-pull linkage and the first rope clamping hook to move, thereby opening the first rope clamping hook and loosening the first colored rope. When the rope clamping and color-changing motor moves in the opposite direction and returns to its original position, the first drive linkage, the first small linkage, the first translation linkage, the first push-pull linkage, and the first rope clamping hook move in the opposite direction under the torque of the first reset torsion spring until the first rope clamping hook closes, clamping the first colored rope.

[0062] The working process of the second rope clamping assembly is as follows: Figure 7 As shown, the cord-clamping and color-changing motor drives the lead screw to rotate, which in turn drives the color-changing slider to move along the color-changing guide rail via the nut. This, in turn, drives the cord-clamping and loosening motor and the lever to move longitudinally, moving the lever to a position where it can drive the second drive linkage. At this time, when the cord-clamping and loosening motor drives the lever to rotate, the lever actuates the second drive linkage. The second drive linkage drives the second small linkage and the second translation linkage, which in turn drives the second push-pull linkage and the second cord-clamping hook to move, thereby opening the second cord-clamping hook and loosening the second colored cord. When the cord-clamping and color-changing motor moves in the opposite direction and returns to its original position, the second drive linkage, the second small linkage, the second translation linkage, the second push-pull linkage, and the second cord-clamping hook move in the opposite direction under the torque of the second reset torsion spring until the second cord-clamping hook closes and clamps the second colored cord.

[0063] The working process of the third rope clamping assembly: as follows Figure 6 As shown, the rope-clamping and color-changing motor drives the lead screw to rotate, which in turn drives the color-changing slider to move along the color-changing guide rail via the nut. This, in turn, drives the rope-clamping and loosening motor and the lever to move longitudinally, moving the lever to a position where it can drive the third drive linkage. At this time, when the rope-clamping and loosening motor drives the lever to rotate, the lever actuates the third drive linkage. The third drive linkage drives the third small linkage and the third translation linkage, which in turn drives the third push-pull linkage and the third rope-clamping hook to move, thereby opening the third rope-clamping hook and loosening the third colored rope. When the rope-clamping and color-changing motor moves in the opposite direction and returns to its original position, the third drive linkage, the third small linkage, the third translation linkage, the third push-pull linkage, and the third rope-clamping hook move in the opposite direction under the torque of the third reset torsion spring until the third rope-clamping hook closes and clamps the third colored rope.

[0064] like Figure 4As shown, the loop-making head assembly includes a loop-making head body 1370, which is annular with a central through-hole for the embroidery needle to pass through. A cord-threading hole 1372 is provided on the lower part of the loop-making head body 1370 around the central through-hole. Correspondingly, a first-color cord-threading hole is provided on the first-color loop-making head body for a first-color cord to pass through, a second-color cord-threading hole is provided on the second-color loop-making head body for a second-color cord to pass through, and a third-color cord-threading hole is provided on the third-color loop-making head body for a third-color cord to pass through.

[0065] like Figure 4 and Figure 7 The swing rope seat 100 is provided with a seat body 1011 and a top cover 1013, wherein the seat body is provided with a ring-forming head mounting hole 1012, and the ring-forming head assembly is installed in the ring-forming head mounting hole through a bearing.

[0066] like Figure 4 As shown, in this embodiment, the ring-forming head assembly further includes a bearing inner ring 1373 integrally disposed in the middle of the ring-forming head body, a cage 1374 mounted on the bearing inner ring, and bearing balls 1375 mounted on the cage. A bearing outer ring is integrally disposed in the ring-forming head mounting hole 1012. The bearing outer ring, bearing balls, cage, and bearing inner ring are combined to form a ring-forming head bearing for rotating and supporting the rotation of the ring-forming head body 1370.

[0067] The above technical solution, because the inner ring of the bearing is integrated with the body of the embroidery head, and the outer ring of the bearing is integrated with the mounting hole of the embroidery head, eliminates the need for additional inner and outer rings, saving the overall radial space of the embroidery head assembly. This integrated bearing design significantly reduces the outer diameter of the embroidery head assembly, allowing for a one-to-one correspondence between the embroidery head assembly and conventional 15mm spacing needle bars. For example, in a three-color rope embroidery design, the embroidery head assembly can correspond to needle positions 1, 2, and 3, fully utilizing each needle position and avoiding wasted embroidery machine functionality, thus greatly improving the machine's function and performance.

[0068] In this embodiment, a swing rope pulley is integrally provided on the upper part of the loop head body. Taking the three-color rope embroidery in the above embodiment as an example, specifically, the first swing rope pulley 1191, the second swing rope pulley 1271, and the third swing rope pulley 1371 are integrally provided with the first loop head body, the second loop head body, and the third loop head body, respectively.

[0069] Furthermore, the ring-forming head mounting hole 1012 has a limiting step, and the lower end of the retainer is limited in engagement with the limiting step. The upper outer circle of the retainer is provided with a limiting protrusion 1376, which is limited in engagement with the upper end face of the ring-forming head mounting hole.

[0070] It is understandable that the spacing between two adjacent needle bars and the spacing between two adjacent loop head assemblies are fixed, but not limited to 15mm, such as 15.5mm, 16mm, etc.

[0071] It is understandable that, in order to achieve more colors of rope embroidery, a fourth color rope embroidery component or more can be set, and a corresponding number of loop-making head components and rope-swinging drive components can be set. The structure and working principle are the same as those of the three-color rope embroidery device in the above embodiment.

[0072] The number of needle bars is relatively large, but the number of needle bars in a multi-color rope embroidery device is not necessarily the same. Here, the needle positions corresponding to the needle bars and the loop head assembly are called rope embroidery needle positions. In the existing technology, whether it is a multi-color or single-color rope embroidery device, the corresponding rope embroidery needle positions are dedicated to rope embroidery and cannot perform flat embroidery. Flat embroidery is performed using flat embroidery needle positions other than rope embroidery needle positions. This is because if the flat embroidery function is selected for the rope embroidery needle position, the rope embroidery device will automatically rise to its highest point and enter a dormant state. At this time, when the needle bars move up and down, the presser feet required for flat embroidery installed on the needle bars will collide with the rope embroidery device.

[0073] A standard flat embroidery presser foot has a ring at the bottom to hold the fabric in place, and the needle passes vertically through the inner hole of the ring during embroidery. However, at the cord embroidery needle position, due to the presence of a looper assembly, the cross-sectional area of ​​the ring at the bottom of the standard flat embroidery presser foot is larger, and it is prone to interference with the cord as it passes through the central through-hole of the looper assembly. Therefore, a standard flat embroidery presser foot cannot be used at the cord embroidery needle position for flat embroidery work.

[0074] Reference Figures 10 to 14 As shown, in some embodiments, in order to achieve both flat embroidery and rope embroidery functions at the rope embroidery needle position, a universal presser foot structure needs to be redesigned. Therefore, this embodiment provides a structure for a universal presser foot that achieves both flat embroidery and rope embroidery at the rope embroidery needle position. At the rope embroidery needle position, a universal presser foot 423 that can be raised and lowered along the needle bar is connected to the needle bar corresponding to the loop head assembly. The universal presser foot 423 includes a presser foot portion 4233 extending vertically. The presser foot portion 4233 passes vertically through the central through hole 13701 during embroidery. The presser foot portion 4233 is offset from the center of the central through hole 13701. The bottom of the presser foot portion 4233 is provided with a pressing fabric surface.

[0075] Here, the presser foot can be designed as a vertically extending column with a uniform cross-section, meaning that each cross-section is of equal size vertically, thus forming a uniform cross-section pressing surface at the bottom. The cross-sectional size of the presser foot 4233 is designed in conjunction with the size of the central through hole 13701. Since the presser foot extends vertically as a whole and is offset from the center of the central through hole, its cross-section only needs to be set smaller to easily pass through the central through hole. In addition, during flat embroidery, the cord 13721 is still threaded through the cord hole 1372, so the presser foot needs to avoid the cord when vertically passing through the central through hole. Because the presser foot extends vertically and its horizontal projection is offset from the center of the central through hole, it is located on one side of the radial centerline of the central through hole, with a gap between it and the side wall on the radial centerline side of the central through hole. At the same time, the cord can be avoided by rotating the loop head body, so that it can vertically pass through the central through hole and avoid the cord during the embroidery process.

[0076] Specifically, the presser foot 4233 has an arc-shaped cross-section, which increases the cross-sectional area within a limited space, resulting in a larger pressing area and facilitating avoidance of the rope. The presser foot 4233 has a slightly curved cross-section, and during embroidery, it is positioned on one side of the radial centerline of the central through-hole, offset from the rope. This ensures that the presser foot, positioned on one side of the rope during embroidery, avoids the rope.

[0077] Furthermore, the looper head body 1370 has a clearance angle that allows the rope 13721 to avoid the embroidery needle 422, thus allowing the embroidery needle 422 to avoid the rope during embroidery. Because after rope embroidery is completed and before flat embroidery begins, the looper head body is at the rope embroidery angle, with the rope 13721 passing through the center of the central through-hole 13701. During rope embroidery, the embroidery needle passes through the rope. However, if this position is maintained, the embroidery needle will interfere with the rope during flat embroidery. Therefore, before flat embroidery begins, the looper head body must first rotate to the clearance angle. This clearance angle can be a further 90-degree rotation, such as... Figure 12 The diagram shows the looper head body 1370 at one of its avoidance angles after rotating 90 degrees counterclockwise. Before rotation, the rope clamping mechanism holds the rope in place, allowing it to pass under the bottom of the looper head body 1370 and then through the rope hole 1372. After rotating 90 degrees counterclockwise, the rope is at one of its avoidance angles. Figure 12 The position is such that, at the avoidance angle, the rope is located on one side of the radial center line of the central through-hole, thus offset from the embroidery needle. Of course, it is understandable that it can be rotated to other avoidance angles, as long as the embroidery needle and presser foot are offset from the rope.

[0078] In this embodiment, the universal presser foot further includes a connector 4232, which is L-shaped and includes a vertical section 42321 and a horizontal section 42322 connected to the bottom end of the vertical section. The upper end of the presser foot is connected to the horizontal section, and the vertical section is connected to the presser foot driving structure. The presser foot driving structure includes a presser foot sleeve 4231 movably nested on the needle bar and a presser foot spring 425. The needle bar 421 is connected to a needle bar driving block 424. The presser foot sleeve 4231 is located below the needle bar driving block 424, and the presser foot spring 425 is located between the needle bar driving block 424 and the presser foot sleeve 4231. The upper end of the vertical section is connected to the presser foot sleeve. When the needle bar descends, the needle bar driving block 424 presses down on the presser foot spring 425, and the presser foot spring 425 exerts a downward force on the presser foot sleeve 4231, thereby driving the universal presser foot 423 to descend.

[0079] Furthermore, the bottom of the needle bar holder is provided with a bottom beam 426, and the bottom beam has a needle bar through hole that mates with the needle bar. The needle bar moves up and down along the needle bar through hole during embroidery. The top of the bottom beam is provided with a presser foot downward stop surface 4261, which engages with the presser foot slide sleeve 4231 when the presser foot presses down on the fabric. The front side of the bottom beam is provided with a sliding groove 4262, and the vertical section 42321 slides in engagement with the sliding groove.

[0080] Furthermore, the horizontal section 42322 is located below the bottom beam. A needle sleeve 427 is nested around the embroidery needle. The needle sleeve has a radial threaded hole and is connected to a radial set screw. The radial set screw tightens the embroidery needle, fixing it to the needle sleeve. Additionally, the needle sleeve 427 is connected to a limiting pin 428. The needle sleeve has a radial through hole through which the limiting pin passes. The limiting pin also has upper and lower through holes through which the embroidery needle passes. The horizontal section has a movable hole that movably engages with the needle sleeve 427. When the needle bar moves upward, the limiting pin engages with the horizontal section, causing the pressure foot to return to its original position.

[0081] Therefore, the needle bar is driven by its needle bar drive block to move up and down. When the needle bar moves downward, the universal presser foot also moves downward under the force of the presser foot spring. When the universal presser foot moves downward to the presser foot stop surface, the presser foot presses the fabric and stops moving downward. The needle bar can then compress the presser foot spring to continue moving downward, completing one stitch of embroidery. When the needle bar moves upward, it moves to the point where the limit pin contacts the horizontal section. The universal presser foot moves upward along with the limit pin, completing the work of the presser foot pressing the fabric during embroidery.

[0082] The lifting assembly is used to drive the rope-swinging mechanism to switch between a first height and a second height before and after flat embroidery operations, with the second height being higher than the first height. The needle bar corresponding to the rope embroidery needle position is connected to a universal presser foot that can be raised and lowered along the needle bar. Flat embroidery at the rope embroidery needle position includes the following steps: Before the flat embroidery operation, the lifting component drives the swing rope mechanism to descend to the first height H1. The swing rope drive motor drives the ring head body to swing to the avoidance angle. At the avoidance angle, the rope is located on one side of the radial center line of the central through hole, thus offset from the embroidery needle, and the universal presser foot is offset from the rope. The needle bar corresponding to the rope embroidery needle position and the universal presser foot are used to perform flat embroidery.

[0083] After the flat embroidery is completed, the lifting component drives the swing rope mechanism to rise to the second height H2, then the hooking mechanism 7 hooks the thread, and the thread cutting mechanism cuts the upper and lower threads.

[0084] The first height H1 and the second height H2 are both calculated based on the distance from the bottom surface of the ring-forming head body to the needle plate surface. Preferably, the first height is 4-6mm; the second height is 20-30mm. For example, the first height is 5mm; the second height is 25mm.

[0085] At the first height H1, both the embroidery needle and the universal presser foot are positioned above the looper head before embroidery begins. Therefore, the looper head driven by the rope drive motor will not interfere with the rope during its swing to the avoidance angle. At the avoidance angle, the projections of the presser foot portion of the embroidery needle and the universal presser foot onto the needle plate are offset from the projection of the rope. Therefore, the embroidery needle and the universal presser foot will not interfere with the rope during their up-and-down movements.

[0086] During the flat embroidery process, the rope-swinging mechanism descends to its first height, ensuring sufficient distance between the horizontal section and the upper part of the looper head when the presser foot presses down on the fabric, thus preventing collisions. After the flat embroidery is completed, the lifting assembly actively coordinates with the needle bar's ascent to raise the rope-swinging mechanism to its second height. This creates sufficient height space between the bottom of the rope-swinging mechanism and the fabric, allowing the hook cutter of the thread-hooking mechanism to hook the thread, which is then cut by the thread-cutting mechanism.

[0087] It is understandable that the above-mentioned method of flat embroidery at the cord embroidery needle position is applicable not only to the multi-color cord embroidery device, but also to the single-color cord embroidery device.

[0088] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Those skilled in the art should understand that the invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the invention will be included within the scope of the claims.

Claims

1. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine, the embroidery machine head including a machine head housing and a needle bar frame laterally slidably mounted on the machine head housing, the machine head housing being equipped with a thread hooking mechanism and a thread cutting mechanism, the needle bar frame having a row of needle bars arranged laterally, the bottom of the needle bars being connected to embroidery needles, and a cord embroidery device being mounted on the side of the needle bar frame, the cord embroidery device including a cord swinging mechanism and a lifting assembly, the cord swinging mechanism including a cord swing component and a cord swinging drive motor, the cord swing component including a cord swing seat and at least one loop head assembly disposed on the cord swing seat, the loop head assembly including a loop head body having a central through hole, the lower part of the loop head body having a cord threading hole circumferentially outside the central through hole, the loop head body rotating to drive the cord passing through the cord threading hole to swing, the cord swinging drive motor driving the loop head body to swing, and the lifting assembly driving the cord swinging mechanism to lift and lower, characterized in that: The lifting assembly is used to drive the rope-swinging mechanism to switch between a first height and a second height before and after flat embroidery operations, with the second height being higher than the first height. The needle bar corresponding to the rope embroidery needle position is connected to a universal presser foot that can be raised and lowered along the needle bar. The following steps are involved in flat embroidery at the rope embroidery stitch position: Before the flat embroidery operation, the lifting component drives the rope swinging mechanism to descend to the first height, and the rope swinging drive motor drives the ring head body to swing to the avoidance angle. At the avoidance angle, the rope is located on one side of the radial center line of the central through hole, thus offset from the embroidery needle, and the universal presser foot is offset from the rope. The needle bar corresponding to the rope embroidery needle position and the universal presser foot are used to perform flat embroidery operations; After the flat embroidery is completed, the lifting component drives the swing rope mechanism to rise to the second height, then the hooking mechanism hooks the thread, and the thread cutting mechanism cuts the upper and lower threads.

2. The method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 1, characterized in that, The first height is 4-6 mm; and / or, the second height is 20-30 mm.

3. The method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 1, characterized in that, The universal presser foot includes a presser foot portion that extends vertically and passes vertically through a central through-hole during embroidery. The presser foot portion is offset from the center of the central through-hole, and the bottom of the presser foot portion is provided with a pressing fabric surface.

4. The method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 3, characterized in that, The cross-section of the presser foot is arc-shaped.

5. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 4, characterized in that, The cross-section of the presser foot is of a slightly curved shape, and the presser foot is located on one side of the radial center line of the central through hole during the embroidery process.

6. The method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 1, characterized in that, The universal presser foot also includes a connector, which is L-shaped and includes a vertical section and a horizontal section connected to the bottom of the vertical section. The upper end of the presser foot is connected to the horizontal section, and the vertical section is connected to the presser foot drive structure.

7. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 6, characterized in that, The presser foot drive structure includes a presser foot sleeve and a presser foot spring movably nested on the needle bar. The needle bar is connected to a needle bar drive block. The presser foot sleeve is located below the needle bar drive block. The presser foot spring is located between the needle bar drive block and the presser foot sleeve. The upper end of the vertical section is connected to the presser foot sleeve. When the needle bar descends, the needle bar drive block presses down on the presser foot spring. The presser foot spring exerts a downward force on the presser foot sleeve, thereby driving the universal presser foot to descend.

8. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 7, characterized in that, The bottom of the needle bar frame is provided with a bottom beam, and the bottom beam is provided with a needle bar through hole that cooperates with the needle bar. The top of the bottom beam is provided with a presser foot downward stop surface, which cooperates with the presser foot sliding sleeve for limiting when the presser foot presses the fabric.

9. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 8, characterized in that, The front side of the bottom beam is provided with a sliding groove, and the vertical section slides in conjunction with the sliding groove.

10. A method for achieving flat embroidery at the cord embroidery needle position on an embroidery machine according to claim 8, characterized in that, The horizontal section is located below the bottom beam. The embroidery needle is nested with a needle sleeve. The needle sleeve is connected to a limiting pin. When the needle bar moves upward, the limiting pin cooperates with the horizontal section and drives the presser foot to return to its original position.

Images