A high-density separating needle selection device large assembly and electronic jacquard machine

Abstract

The application discloses a high-density separated needle selection device large component and an electronic jacquard machine, and relates to the field of electronic jacquard machines. The large component comprises an electromagnet plate formed by 8n electromagnet units stacked in front of and behind each other, a pulley block plate formed by 8n pulley block units stacked in front of and behind each other, a left armature hook plate formed by 8n left armature hook units stacked in front of and behind each other, a right armature hook plate formed by 8n right armature hook units stacked in front of and behind each other, a mounting frame and a driving printed circuit board. Each electromagnet unit is installed above a corresponding pulley block unit in a longitudinal separated design, and each left armature hook unit and each right armature hook unit is installed on the left and right sides of a corresponding electromagnet unit in a lateral separated design. The application adopts the separated design, is convenient to maintain, is beneficial to shock absorption and heat dissipation of the electromagnet unit, is more beneficial to working requirements, improves the movement flexibility of the armature hook, reduces the production cost, and improves the production quality and reliability of the high-density large component.

Description

Technical Field

[0001] This invention belongs to the technical field of electronic jacquard machines in textile machinery, specifically relating to a high-density separation needle selection device and an electronic jacquard machine. Background Technology

[0002] In recent years, electronic jacquard machines have made significant progress. A key component of electronic jacquard machines is the needle selector (also called a solenoid valve, electromagnet, or assembly). The needle selector is the actuating component of the electronic jacquard machine, and its function is to convert electrical signals into the raising and lowering of warp yarns. The working principle of the needle selector is well-known technology, including a vertical hook that moves up and down with the jacquard machine's lifting blade. This vertical hook is controlled by an electromagnet and its armature hook to "hook" and "unhook." When "hooked," the vertical hook does not move with the lifting blade; when "unhooked," the vertical hook moves with the lifting blade. Since the vertical hook connects to the guide yarn and heddle wires to control the warp yarns, the raising and lowering of the vertical hook corresponds to the raising and lowering of the warp yarns.

[0003] Jacquard looms come in single-action and double-action types. Double-action looms have a more complex mechanism; one jacquard needle corresponds to two vertical hooks, and these two hooks are converted into the movement of one jacquard needle (first thread) via a pulley system. Double-action jacquard looms cause less damage to the warp yarns, which is beneficial for weaving. Currently, most electronic jacquard looms are double-action. Mass-produced commercially available needle selection devices often integrate eight (or multiples of eight) electromagnets and their corresponding mechanisms into a single unit for easy installation and maintenance. A well-known brand of electronic jacquard loom uses eight electromagnets, their corresponding mechanisms, and the pulley system as a single, independent component. A needle box is set up within the jacquard loom, and the component is arranged in a dense rectangular pattern within the needle box. The drive circuit board is electrically connected to the component via edge connectors.

[0004] This type of component is based on a complex-shaped plastic clip. All the parts required for a needle selection device are installed on or between two plastic clips, including an electromagnet, two armature hooks, two springs, two vertical hooks, a pulley block, an upper pulley line, a lower pulley line, and a first thread connector. A clip with all the parts installed constitutes a needle selection device, enabling the complete needle selection function for a jacquard needle. A commonly used 8-needle assembly is a combination of eight such complete functional clips. To produce a 10,000-needle jacquard machine, 10,000 such functional clips would actually need to be produced.

[0005] As electronic jacquard machines evolve towards higher needle counts, the density of the needle selection device inevitably becomes a requirement. Otherwise, the jacquard machine would be too large to be compatible with the loom, thus creating a demand for high-density needle selection devices. Double-layer technology is one approach to improving needle selection device density, including double-layer electromagnets and double-layer pulley systems. If the aforementioned functional sheet approach is continued, the size of the functional sheets increases, complexity rises, assembly becomes more difficult, leading to higher production costs and lower product quality and reliability. Simultaneously, the ease of installation, debugging, and maintenance on the weaving site must also be considered. Summary of the Invention

[0006] In order to overcome the technical difficulties of the prior art, the present invention provides a high-density separation needle selection device component and an electronic jacquard machine.

[0007] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution: A high-density, split-type needle selection device includes a large component comprising an electromagnet plate consisting of 8n electromagnet units stacked front to back, a pulley block plate consisting of 8n pulley block units stacked front to back, a left hook plate consisting of 8n left hook units stacked front to back, a right hook plate consisting of 8n right hook units stacked front to back, a mounting frame, and a drive printed circuit board, where n is a positive integer. The electromagnet plate, the left hook plate, the right hook plate, and the drive printed circuit board are assembled into a whole by the mounting frame and then mounted on top of the pulley block plate. Each electromagnet unit is longitudinally split and mounted above its corresponding pulley block unit, while each left hook unit and each right hook unit is laterally split and mounted on the left and right sides of its corresponding electromagnet unit. Each electromagnet unit includes an upper electromagnet and a lower electromagnet. The left armature hook unit includes an upper left armature hook and its matching rotating shaft and return torsion spring for engaging with the left magnetic pole surface of the upper electromagnet, and a lower left armature hook and its matching rotating shaft and return torsion spring for engaging with the left magnetic pole surface of the lower electromagnet; the right armature hook unit includes an upper right armature hook and its matching rotating shaft and return torsion spring for engaging with the right magnetic pole surface of the upper electromagnet, and a lower right armature hook and its matching rotating shaft and return torsion spring for engaging with the right magnetic pole surface of the lower electromagnet; the pulley group unit includes a double-layer upper pulley group and a double-layer lower pulley group. The upper pulley lines of the double-layer upper pulley group are respectively connected upwards to a left rear vertical hook for engaging with the upper left armature hook and a right rear vertical hook for engaging with the upper right armature hook. The upper pulley lines of the double-layer lower pulley group are respectively connected upwards to a left front vertical hook for engaging with the lower left armature hook and a right front vertical hook for engaging with the lower right armature hook.

[0008] Furthermore, the electromagnet unit also includes an electromagnet frame, with the upper and lower electromagnets respectively mounted at the upper and lower ends of the electromagnet frame, arranged symmetrically. A printed circuit board slot plate is provided at the top of the electromagnet frame, with a printed circuit board slot at its top. Coil pins for connecting the upper and lower electromagnet coils are provided on the left and right sides of the printed circuit board slot plate, respectively. A lower latch is provided on the front of the middle section of the electromagnet frame. A lower latch is provided on the back of the middle section. The lower latch and the lower latch are positioned front to back and matched in size. An upper latch is provided on the front of the printed circuit board slot plate. An upper latch is provided on the back of the printed circuit board slot plate. The upper latch and the upper latch are positioned front to back and matched in size. A through hole is provided in the middle of the electromagnet frame. Two adjacent electromagnet frames are spliced ​​together front to back by the cooperation of the upper latch and the lower latch, and the lower latch and the lower latch are spliced ​​together by the cooperation of corresponding fasteners with the through hole after splicing.

[0009] Furthermore, the upper electromagnet and the lower electromagnet have the same structure, both consisting of an I-shaped iron core wound with enameled wire. One end of the I-shaped iron core is a long magnetic pole, and the other end is a short magnetic pole. The left and right ends of the long magnetic pole have a first bend that curves backward, and the left and right ends of the short magnetic pole have a second bend that curves forward. The first bend and the second bend are offset from each other, and the offset is equal to the thickness of the straight rod. The concave surface of the first bend serves as a sliding magnetic pole surface, and the side end face of the second bend serves as an attracting magnetic pole surface. The sliding magnetic pole surface and the attracting magnetic pole surface on the same side form two intersecting magnetic pole surfaces. A magnetically conductive plastic cover is provided in front of the sliding magnetic pole surface. There is a gap between the magnetically conductive plastic cover and the sliding magnetic pole surface to form a groove for easy insertion of the armature hook. A magnetically conductive elastic element for contacting the armature hook is provided in the groove.

[0010] Furthermore, the left bit hook unit also includes a front left partition and a rear left partition that can be assembled together. The front left partition has a left front vertical hook guide rail for the left front vertical hook to slide up and down. The lower part of the front left partition has a lower left hook shaft hole and a lower left torsion spring hole. The lower part of the rear left partition has a lower left hook pivot that mates with the lower left hook shaft hole and a lower left torsion spring pivot that mates with the lower left torsion spring hole. The lower left bit hook and its lower left return torsion spring are located on the front of the front left partition and to the left of the left front vertical hook guide rail. The shaft hole of the lower left bit hook passes through the left... The lower left hook shaft is rotatably connected to the lower hook shaft hole. The lower end of the lower left return torsion spring is rotatably connected to the lower left torsion spring shaft passing through the lower left torsion spring hole. The upper end of the lower left return torsion spring is hooked to the left side of the middle part of the lower left armature hook. The hook tip of the lower left armature hook can be kept extending to the right into the left front vertical hook guide rail under the action of the restoring force of the lower left return torsion spring. The front of the left rear partition is provided with a left rear vertical hook guide rail for the left rear vertical hook to slide up and down. The upper part of the left front partition is provided with a left upper hook shaft hole and a left upper torsion spring hole. The upper part of the left rear partition is provided with a part that can be matched with the left upper hook shaft hole. The upper left hook shaft and the upper left torsion spring shaft that mate with the upper left torsion spring hole are combined. The upper left armature hook and its upper left return torsion spring are located on the front of the left rear partition and on the left side of the left rear vertical hook guide rail. The shaft hole of the upper left armature hook is rotatably connected to the upper left hook shaft that passes through the upper left hook shaft hole. The upper end of the upper left return torsion spring is rotatably connected to the upper left torsion spring shaft that passes through the upper left torsion spring hole. The lower end of the upper left return torsion spring is hooked to the left side of the middle part of the upper left armature hook. The hook tip of the upper left armature hook can be kept extending to the right into the left rear partition under the action of the restoring force of the upper left return torsion spring. Inside the vertical hook guide rail; the top of both the left front partition and the left rear partition are provided with upper fixing holes, and the bottom of both the left front partition and the left rear partition are provided with lower fixing holes; the left front partition and the left rear partition are spliced ​​together front and back by the cooperation of the left lower hook shaft with the left lower hook shaft hole, the left lower torsion spring shaft with the left lower torsion spring hole, the left upper hook shaft with the left upper hook shaft hole, and the left upper torsion spring shaft with the left upper torsion spring hole; and adjacent left bit hook units are fixed by corresponding fasteners cooperating with the upper fixing holes and the lower fixing holes after splicing; The right bit hook unit also includes a right front partition and a right rear partition that can be assembled together. The front of the right front partition has a right front vertical hook guide rail for the right front vertical hook to slide up and down. The lower part of the right front partition has a right lower hook shaft hole and a right lower torsion spring hole. The lower part of the right rear partition has a right lower hook pivot that mates with the right lower hook shaft hole and a right lower torsion spring pivot that mates with the right lower torsion spring hole. The right lower bit hook and its right lower return torsion spring are located on the front of the right front partition and to the left of the right front vertical hook guide rail. The shaft hole of the right lower bit hook passes through the right lower hook shaft hole. The lower right hook shaft is rotatably connected to the lower right return torsion spring. The lower end of the lower right return torsion spring is rotatably connected to the lower right torsion spring shaft passing through the lower right torsion spring hole. The upper end of the lower right return torsion spring is hooked to the left side of the middle of the lower right armature hook. The hook tip of the lower right armature hook can be kept extending to the right into the right front vertical hook guide rail under the action of the restoring force of the lower right return torsion spring. The front of the right rear partition is provided with a right rear vertical hook guide rail for the right rear vertical hook to slide up and down. The upper part of the right front partition is provided with a right upper hook shaft hole and a right upper torsion spring hole. The upper part of the right rear partition is provided with a right armature that can cooperate with the right upper hook shaft hole. The upper hook pivot and the upper right torsion spring pivot that mates with the upper right torsion spring hole; the upper right armature hook and its upper right return torsion spring are located on the front of the right rear partition and on the left side of the right rear vertical hook guide rail. The shaft hole of the upper right armature hook is rotatably connected to the upper right hook pivot that passes through the upper right hook shaft hole. The upper end of the upper right return torsion spring is rotatably connected to the upper right torsion spring pivot that passes through the upper right torsion spring hole. The lower end of the upper right return torsion spring is hooked to the left side of the middle part of the upper right armature hook. The hook tip of the upper right armature hook can be kept extending to the right into the right rear vertical hook under the action of the restoring force of the upper right return torsion spring. Inside the guide rail; the top of both the right front partition and the right rear partition are provided with upper fixing holes, and the bottom of both the right front partition and the right rear partition are provided with lower fixing holes; the right front partition and the right rear partition are spliced ​​together front and back by the cooperation of the right lower hook shaft with the right lower hook shaft hole, the right lower torsion spring shaft with the right lower torsion spring hole, the right upper hook shaft with the right upper hook shaft hole, and the right upper torsion spring shaft with the right upper torsion spring hole; and adjacent right bit hook units are fixed by corresponding fasteners cooperating with the upper fixing holes and the lower fixing holes after splicing.

[0011] Furthermore, the lower left armature hook, the upper left armature hook, the lower right armature hook, and the upper right armature hook each include a straight rod portion with a rectangular cross-section, a magnetic pole surface sliding contact portion, a magnetic pole surface attracting contact portion, a shaft hole portion, and a hook tip portion; In the lower left armature hook, the shaft hole is located on the left side of the bottom end of the straight rod via the magnetic pole surface sliding contact portion, and the hook tip is located on the right side of the top end of the straight rod via the magnetic pole surface attraction contact portion. Both the hook tip and the magnetic pole surface attraction contact portion are on the right side of the lower left hook shaft, and the hook tip has a "lifting hook" structure with an opening to the upper right. When the lower electromagnet is energized, the magnetic pole surface sliding contact portion and the magnetic pole surface attraction contact portion can contact the two magnetic pole surfaces on the left side of the lower electromagnet to form a lower left closed magnetic circuit, and the shaft hole is located outside the lower left closed magnetic circuit. In the upper left armature hook, the shaft hole is located on the top right side of the straight rod via the magnetic pole surface sliding contact portion, and the hook tip is located on the bottom right side of the straight rod via the magnetic pole surface attraction contact portion. Both the hook tip and the magnetic pole surface attraction contact portion are on the left side of the upper left hook shaft, and the hook tip has a "lifting hook" structure with an opening to the upper right. When the upper electromagnet is energized, the magnetic pole surface sliding contact portion and the magnetic pole surface attraction contact portion can contact the two magnetic pole surfaces on the left side of the upper electromagnet to form an upper left closed magnetic circuit, and the shaft hole is located outside the upper left closed magnetic circuit. In the lower right armature hook, the shaft hole is located on the right side of the bottom end of the straight rod via the magnetic pole surface sliding contact portion, and the hook tip is located on the left side of the top end of the straight rod via the magnetic pole surface attraction contact portion. Both the hook tip and the magnetic pole surface attraction contact portion are on the left side of the lower right hook shaft, and the hook tip has a "lifting hook" structure with an opening to the upper left. When the lower electromagnet is energized, the magnetic pole surface sliding contact portion and the magnetic pole surface attraction contact portion can contact the two magnetic pole surfaces on the right side of the lower electromagnet to form a lower right closed magnetic circuit, and the shaft hole is located outside the lower right closed magnetic circuit. In the upper right armature hook, the shaft hole is located on the top left side of the straight rod via the magnetic pole surface sliding contact portion, and the hook tip is located on the bottom left side of the straight rod via the magnetic pole surface attraction contact portion. The hook tip and the magnetic pole surface attraction contact portion are both on the right side of the upper right hook shaft, and the hook tip has a "lifting hook" structure with an opening to the upper left. When the upper electromagnet is energized, the magnetic pole surface sliding contact portion and the magnetic pole surface attraction contact portion can contact the two magnetic pole surfaces on the right side of the upper electromagnet to form a closed magnetic circuit in the upper right, and the shaft hole is located outside the closed magnetic circuit in the upper right.

[0012] Furthermore, the pulley block unit also includes a double-layer pulley block groove plate, which is formed by splicing a first clamping piece and a second clamping piece together. The front groove plate of the first clamping piece has three functional sections from top to bottom: a double-layer lower pulley block upper pulley line groove section, a double-layer lower pulley block pulley sliding groove section, and a double-layer lower pulley block lower pulley line groove section. The back groove plate of the first clamping piece also has three functional sections from top to bottom: a double-layer upper pulley block upper pulley line groove section, a double-layer upper pulley block pulley sliding groove section, and a double-layer upper pulley block lower pulley line groove section. The upper pulley groove segment of the lower pulley assembly corresponds to the lower pulley slide groove segment in terms of their front-to-back positions. The thickest pulley support segment of the upper pulley slide groove segment is located at the center of the first clamping plate, while the upper pulley groove segment of the lower pulley assembly is located on both sides of the first clamping plate. They can be nested together without spatial conflict. The lower pulley slide groove segment corresponds to the lower pulley groove segment of the upper pulley assembly in terms of their front-to-back positions. The lower pulley groove segment of the upper pulley assembly is located on both sides of the first clamping plate and does not conflict with the pulley support segment of the lower pulley slide groove segment located at the center of the first clamping plate. The upper pulley slide groove segment and the lower pulley slide groove segment are designed to be staggered and stacked on both sides of the front and back, and the upper pulley slide groove segment and the lower pulley slide groove segment have the same thickness. The left front vertical hook and the right front vertical hook are respectively slidably disposed on the left and right sides of the lower electromagnet. The double-layer sliding wheel assembly is slidably disposed on the double-layer sliding wheel assembly pulley groove section. The two ends of the upper pulley line of the double-layer sliding wheel assembly pass through the upper pulley line groove section of the double-layer sliding wheel assembly and are respectively connected to the bottom ends of the left front vertical hook and the right front vertical hook. The two ends of the lower pulley line of the double-layer sliding wheel assembly pass through the lower pulley line groove section of the double-layer sliding wheel assembly, with one end fixed and the other end connected to the first lead wire connector. The left front vertical hook and the right front vertical hook move up and down with the lifting of the knife, causing the double-layer sliding wheel assembly to move up and down within the double-layer sliding wheel assembly pulley groove section. The left and right rear vertical hooks are slidably mounted on the left and right sides of the upper electromagnet, respectively. The double-layer upper pulley assembly is slidably mounted on the pulley groove section of the double-layer upper pulley assembly. The two ends of the upper pulley line of the double-layer upper pulley assembly pass through the upper pulley line groove section and are connected to the bottom ends of the left and right rear vertical hooks, respectively. The two ends of the lower pulley line of the double-layer upper pulley assembly pass through the lower pulley line groove section of the double-layer upper pulley assembly, with one end fixed and the other end connected to the second lead wire connector. The left and right rear vertical hooks move up and down with the lifting of the knife, causing the double-layer upper pulley assembly to move up and down within the pulley groove section of the double-layer upper pulley assembly. The double-layer pulley system groove plate assembles the double-layer upper pulley system and its upper and lower pulley lines, the double-layer lower pulley system and its upper and lower pulley lines, the left front vertical hook, the left rear vertical hook, the right front vertical hook, the right rear vertical hook, the first head wire connector, and the second head wire connector into a whole and fixes them with fasteners; and the double-layer upper pulley system and the double-layer lower pulley system are stacked vertically and vertically on the same plane through the front and rear concave and convex design of the pulley groove section of the double-layer lower pulley system and the pulley groove section of the double-layer upper pulley system inside the double-layer pulley system groove plate.

[0013] Furthermore, the left front vertical hook, the left rear vertical hook, the right front vertical hook, and the right rear vertical hook have the same structure, each including a rod-shaped body. A side ear for engaging with the blade edge is provided in the middle of the outer side of the rod-shaped body. A top hook is provided at the top of the inner side of the rod-shaped body, with the hook tip close to the inner edge of the rod-shaped body and the hook bottom close to the axis of the rod-shaped body. A protruding edge is provided at the upper edge of the inner side of the rod-shaped body, below the top hook. This protruding edge, when the vertical hook moves upward, laterally pushes the corresponding armature hook from a static magnetic gap position away from the electromagnet to a dynamic magnetic gap position close to the electromagnet and maintains it in the dynamic magnetic gap position. The protruding edge laterally protrudes beyond the hook tip of the top hook. The contour curve of the protruding edge is divided into sections located on the upper... The rod-shaped body has a pushing section and a holding section located below it. The pushing section is an inclined curve starting from the bottom of the top hook, and the holding section is a straight line parallel to the moving direction of the rod-shaped body. The pushing section and the holding section are smoothly connected. The distance from the bottom of the holding section to the bottom of the top hook is greater than the distance from the tip of the top hook to the bottom of the top hook. The length of the holding section of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by its needle selection device. The middle and lower parts of the inner side of the rod-shaped body are provided with a limiting convex edge along its edge for fitting into the corresponding groove on the first clamp and ensuring that the vertical hook does not have lateral displacement. The top end of the limiting convex edge is connected to the bottom end of the holding section of the convex edge in a straight line. At least one damping groove is provided between the side ear and the rod-shaped body to block the vibration of the knife lifting.

[0014] Furthermore, the mounting bracket comprises a left front mounting plate, a left rear mounting plate, a right front mounting plate, and a right rear mounting plate. The left front mounting plate is attached to the front end face of the assembled left bit hook plate, and the top end of the left front mounting plate is fixedly connected to the front left side face of the drive printed circuit board, while the bottom end of the left front mounting plate is fixedly connected to the front left side face of the assembled pulley assembly plate. The left rear mounting plate is attached to the rear end face of the assembled left bit hook plate, and the top end of the left rear mounting plate is fixedly connected to the rear left side face of the drive printed circuit board, while the bottom end of the left rear mounting plate is fixedly connected to the rear left side face of the assembled pulley assembly plate. The right front mounting plate is attached to the front end face of the assembled right bit hook plate, and the top end of the right front mounting plate is fixedly connected to the front right side face of the drive printed circuit board, and the bottom end of the right front mounting plate is fixedly connected to the front right side face of the assembled pulley assembly plate; the right rear mounting plate is attached to the rear end face of the assembled right bit hook plate, and the top end of the right rear mounting plate is fixedly connected to the rear right side face of the drive printed circuit board, and the bottom end of the right rear mounting plate is fixedly connected to the rear right side face of the assembled pulley assembly plate; positioning mounting parts for cooperating with the needle box are installed on both sides of the pulley assembly plate.

[0015] Furthermore, the number of the electromagnet unit, the pulley block unit, the left bit hook unit, and the right bit hook unit is a large multiple of 8, where the large multiple is n≥8.

[0016] An electronic jacquard machine employing the aforementioned high-density, separate needle selection device.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention adopts a separate design for the pulley block unit, electromagnet unit, and left and right armature hook units of the needle selection device assembly. During on-site maintenance, the electromagnet part can be disassembled without moving the pulley block part, which facilitates installation, debugging, and maintenance. It is also beneficial for the vibration damping and heat dissipation of the electromagnet unit. The pulley block unit and the left and right armature hook units can be made of materials with different properties, which is more conducive to working requirements, improves the movement flexibility of the armature hooks, improves the operational reliability of the assembly, reduces production costs, and improves the production quality and reliability of high-density large components.

[0018] The plastic clip structure of this invention is very suitable for the production and manufacturing of pulley blocks, and the failure rate of the pulley blocks is relatively low during use. The double-layer pulley block structure makes the clip size longer, and the production cost of plastic parts is positively correlated with size. Therefore, the pulley block is separated from the original functional piece and becomes an independent pulley block plate.

[0019] In this invention, the armature hook and the pivot are load-bearing components. The clamping structure in this part mainly serves to provide the pivot and transmit force to the needle box; these are not the strengths of plastic materials. Adopting a separate structural approach breaks down the limitations of functional pieces, allowing the use of a higher-performance metal shaft and the addition of a metal rod with better load-bearing capacity. As long as the load-bearing capacity is not an issue, as many armature hooks as possible can be installed on a single shaft, thus enabling the production of a large number of components.

[0020] The reset torsion spring design of this invention is the key to the separation structure. It not only achieves the independence of the armature hook part, but also provides a certain auxiliary positioning force for the armature hook, which is very advantageous during assembly.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram showing the separate installation of the electromagnet plate, left armature hook plate, right armature hook plate, and drive printed circuit board of the present invention. Figure 2 This is a schematic diagram of the pulley block plate of the present invention; Figure 3 This is a schematic diagram of the electromagnet unit of the present invention; Figure 4 This is a schematic diagram of the structure of the left-hand hook unit of the present invention; Figure 5 This is a schematic diagram of the right-hand hook unit of the present invention; Figure 6 This is a schematic diagram showing the assembly relationship between the upper electromagnet and the upper right armature hook of the present invention; Figure 7 This is a schematic diagram of the pulley block unit of the present invention; Figure 8 This is a schematic diagram of one embodiment of the vertical hook of the present invention; Figure 9 This is a schematic diagram of another embodiment of the vertical hook of the present invention. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The description herein is intended to provide a further understanding of the invention and forms part of this application. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0024] See Figure 1 and Figure 2 As shown, the present invention provides a high-density split needle selection device large component, which mainly includes an electromagnet plate composed of 8n electromagnet units stacked front to back, a pulley block plate composed of 8n pulley block units stacked front to back, a left hook plate composed of 8n left hook units stacked front to back, a right hook plate composed of 8n right hook units stacked front to back, a mounting frame, and a drive printed circuit board 10, where n is a positive integer.

[0025] The electromagnet plate, the left armature hook plate, the right armature hook plate, and the drive printed circuit board 10 are assembled into a whole by the mounting bracket and then installed on the top of the pulley block plate. Each electromagnet unit adopts a longitudinally separate design and is installed above its corresponding pulley block unit. Each left armature hook unit and each right armature hook unit adopts a laterally separate design and are installed on the left and right sides of their respective electromagnet units.

[0026] The electromagnet unit includes an upper electromagnet 3b and a lower electromagnet 3a. The left armature hook unit includes an upper left armature hook 4a2 for engaging with the left magnetic pole surface of the upper electromagnet 3b, along with its matching shaft and return torsion spring, and a lower left armature hook 4a1 for engaging with the left magnetic pole surface of the lower electromagnet 3a, along with its matching shaft and return torsion spring. The right armature hook unit includes an upper right armature hook 5a2 for engaging with the right magnetic pole surface of the upper electromagnet 3b, along with its matching shaft and return torsion spring; and a lower right armature hook 5a1 for engaging with the right magnetic pole surface of the lower electromagnet 3a, along with its matching shaft and return torsion spring. The pulley unit includes a double-layer upper pulley group 7b and a double-layer lower pulley group 7a. The upper pulley lines of the double-layer upper pulley group 7b are respectively connected upwards to a left rear vertical hook 6a2 for engaging with the upper left armature hook 4a2 and a right rear vertical hook 6b2 for engaging with the upper right armature hook 5a2. The upper pulley lines of the double-layer lower pulley group 7a are respectively connected upwards to a left front vertical hook 6a1 for engaging with the lower left armature hook 4a1 and a right front vertical hook 6b1 for engaging with the lower right armature hook 5a1.

[0027] See Figure 3As shown, the electromagnet unit also includes an electromagnet frame 1. The upper electromagnet 3b and the lower electromagnet 3a are respectively installed at the upper and lower ends of the electromagnet frame 1, and the upper electromagnet 3b and the lower electromagnet 3a are arranged symmetrically. A printed circuit board slot plate 2 is provided at the top of the electromagnet frame 1. A printed circuit board slot 201 is opened at the top of the printed circuit board slot plate 2. Coil pins 202 for connecting the coils of the upper electromagnet 3b and the lower electromagnet 3a are provided on the left and right sides of the printed circuit board slot plate 2, respectively.

[0028] The electromagnet frame 1 has a lower buckle 101 on its front center and a lower slot on its back center. The lower buckle 101 and the lower slot are positioned and sized to match. The printed circuit board slot plate 2 has an upper buckle 203 on its front and an upper slot on its back. The upper buckle 203 and the upper slot are positioned and sized to match. The electromagnet frame 1 has a through hole 102 in its center. Two adjacent electromagnet frames 1 are joined together by the engagement of the upper buckle 203 and the lower slot, and by the engagement of the lower buckle 101 and the lower slot. They are then secured by fasteners that engage with the through hole 102 after joining.

[0029] See Figure 6 As shown, the upper electromagnet 3b and the lower electromagnet 3a have the same structure, both consisting of an I-shaped iron core 301 with enameled wire wound around it. One end of the I-shaped iron core 301 has a long magnetic pole 302, and the other end has a short magnetic pole 303. During installation, the long magnetic pole 302 of the upper electromagnet 3b is on top, and the short magnetic pole 303 is on the bottom, while the long magnetic pole 302 of the lower electromagnet 3a is on the bottom, and the short magnetic pole 303 is on top. The left and right ends of the long magnetic pole 302 have a first bend that curves backward, and the left and right ends of the short magnetic pole 303 have a second bend that curves forward. The first bend and the second bend are offset from each other, and the offset is equal to the thickness of the straight rod 401. This is what distinguishes this invention from traditional solutions. The iron core of traditional solutions is usually a planar structure with the magnetic poles facing the same direction. The iron core of this invention is actually a three-dimensional structure.

[0030] The concave surface of the first bend serves as the sliding magnetic pole surface 304, and the side end face of the second bend serves as the attracting magnetic pole surface 305. The sliding magnetic pole surface 304 and the attracting magnetic pole surface 305, located on the same side, constitute two intersecting magnetic pole surfaces. A magnetically conductive plastic cover 306 is provided in front of the sliding magnetic pole surface 304. There is a gap between the magnetically conductive plastic cover 306 and the sliding magnetic pole surface 304 to form a groove for easy insertion of the armature hook. A magnetically conductive elastic element 307 for contacting the armature hook is provided in the groove. The side end face of the second bend serves as the attracting magnetic pole surface 305. The sliding magnetic pole surface 304 and the attracting magnetic pole surface 305, located on the same side, constitute two intersecting magnetic pole surfaces.

[0031] See Figure 4 As shown, the left hook unit also includes a front left partition 4c and a rear left partition 4d that can be assembled together.

[0032] The front of the left front partition 4c is provided with a left front vertical hook guide rail 4c1 for the left front vertical hook 6a1 to slide up and down. The lower part of the left front partition 4c is provided with a left lower hook shaft hole 4c2 and a left lower torsion spring hole 4c3. The lower part of the left rear partition 4d is provided with a left lower hook shaft 4d2 that can cooperate with the left lower hook shaft hole 4c2 and a left lower torsion spring shaft 4d3 that can cooperate with the left lower torsion spring hole 4c3. The lower left bit hook 4a1 and its lower left return torsion spring 4a3 are located on the front of the left front partition 4c and on the left side of the left front vertical hook guide rail 4c1. The shaft hole of the lower left bit hook 4a1 is rotatably connected to the lower left hook shaft 4d2 that passes through the lower left hook shaft hole 4c2. The lower end of the lower left return torsion spring 4a3 is rotatably connected to the lower left torsion spring shaft 4d3 that passes through the lower left torsion spring hole 4c3. The upper end of the lower left return torsion spring 4a3 is hooked to the left side of the middle part of the lower left bit hook 4a1. The hook tip of the lower left bit hook 4a1 can be kept extending to the right into the left front vertical hook guide rail 4c1 under the action of the restoring force of the lower left return torsion spring 4a3.

[0033] The front of the left rear partition 4d is provided with a left rear vertical hook guide rail 4d1 for the left rear vertical hook 6a2 to slide up and down. The upper part of the left front partition 4c is provided with a left upper hook shaft hole 4c4 and a left upper torsion spring hole 4c5. The upper part of the left rear partition 4d is provided with a left upper hook rotating shaft 4d4 that can cooperate with the left upper hook shaft hole 4c4 and a left upper torsion spring rotating shaft 4d5 that can cooperate with the left upper torsion spring hole 4c5. The upper left bit hook 4a2 and its upper left return torsion spring 4a4 are located on the front of the left rear partition 4d and on the left side of the left rear vertical hook guide rail 4d1. The shaft hole of the upper left bit hook 4a2 is rotatably connected to the upper left hook shaft 4d4 after passing through the upper left hook shaft hole 4c4. The upper end of the upper left return torsion spring 4a4 is rotatably connected to the upper left torsion spring shaft 4d5 after passing through the upper left torsion spring hole 4c5. The lower end of the upper left return torsion spring 4a4 is hooked to the left side of the middle part of the upper left bit hook 4a2. The hook tip of the upper left bit hook 4a2 can be kept extending to the right into the left rear vertical hook guide rail 4d1 under the action of the restoring force of the upper left return torsion spring 4a4.

[0034] The top of both the left front partition 4c and the left rear partition 4d has an upper fixing hole 17, and the bottom of both has a lower fixing hole 18. The left front partition 4c and the left rear partition 4d are joined together by the engagement of the lower left hook shaft 4d2 with the lower left hook shaft hole 4c2, the lower left torsion spring shaft 4d3 with the lower left torsion spring hole 4c3, the upper left hook shaft 4d4 with the upper left hook shaft hole 4c4, and the upper left torsion spring shaft 4d5 with the upper left torsion spring hole 4c5. Adjacent left hook units are fixed by corresponding fasteners engaging with the joined upper fixing holes 17 and lower fixing holes 18.

[0035] See Figure 5 As shown, the right-hand hook unit also includes a right front partition 5c and a right rear partition 5d that can be assembled together.

[0036] The front of the right front partition 5c is provided with a right front vertical hook guide rail 5c1 for the right front vertical hook 6b1 to slide up and down. The lower part of the right front partition 5c is provided with a right lower hook shaft hole 5c2 and a right lower torsion spring hole 5c3. The lower part of the right rear partition 5d is provided with a right lower hook shaft 5d2 that can cooperate with the right lower hook shaft hole 5c2 and a right lower torsion spring shaft 5d3 that can cooperate with the right lower torsion spring hole 5c3. The lower right bit hook 5a1 and its lower right return torsion spring 5a3 are located on the front of the right front partition 5c and on the left side of the right front vertical hook guide rail 5c1. The shaft hole of the lower right bit hook 5a1 is rotatably connected to the lower right hook shaft 5d2 that passes through the lower right hook shaft hole 5c2. The lower end of the lower right return torsion spring 5a3 is rotatably connected to the lower right torsion spring shaft 5d3 that passes through the lower right torsion spring hole 5c3. The upper end of the lower right return torsion spring 5a3 is hooked to the left side of the middle part of the lower right bit hook 5a1. The hook tip of the lower right bit hook 5a1 can be kept extending to the right into the right front vertical hook guide rail 5c1 under the action of the restoring force of the lower right return torsion spring 5a3.

[0037] The front of the right rear partition 5d is provided with a right rear vertical hook guide rail 5d1 for the right rear vertical hook 6b2 to slide up and down. The upper part of the right front partition 5c is provided with a right upper hook shaft hole 5c4 and a right upper torsion spring hole 5c5. The upper part of the right rear partition 5d is provided with a right upper hook shaft 5d4 that can cooperate with the right upper hook shaft hole 5c4 and a right upper torsion spring shaft 5d5 that can cooperate with the right upper torsion spring hole 5c5. The upper right armature hook 5a2 and its upper right return torsion spring 5a4 are located on the front of the right rear partition 5d and on the left side of the right rear vertical hook guide rail 5d1. The shaft hole of the upper right armature hook 5a2 is rotatably connected to the upper right hook shaft 5d4 after passing through the upper right hook shaft hole 5c4. The upper end of the upper right return torsion spring 5a4 is rotatably connected to the upper right torsion spring shaft 5d5 after passing through the upper right torsion spring hole 5c5. The lower end of the upper right return torsion spring 5a4 is hooked to the left side of the middle part of the upper right armature hook 5a2. The hook tip of the upper right armature hook 5a2 can be kept extending to the right into the right rear vertical hook guide rail 5d1 under the action of the restoring force of the upper right return torsion spring 5a4.

[0038] Both the right front partition 5c and the right rear partition 5d have upper fixing holes 17 at their tops and lower fixing holes 18 at their bottoms. The right front partition 5c and the right rear partition 5d are joined together by the engagement of the lower right hook shaft 5d2 with the lower right hook shaft hole 5c2, the lower right torsion spring shaft 5d3 with the lower right torsion spring hole 5c3, the upper right hook shaft 5d4 with the upper right hook shaft hole 5c4, and the upper right torsion spring shaft 5d5 with the upper right torsion spring hole 5c5. Adjacent right armature hook units are fixed by corresponding fasteners that engage with the joined upper fixing holes 17 and lower fixing holes 18.

[0039] Because the present invention sets the two electromagnets into a symmetrical structure, the present invention adopts different hook designs for a pair of upper-mounted iron hooks and a pair of lower-mounted iron hooks.

[0040] See Figure 5 and Figure 6 As shown, the lower left hook 4a1, the upper left hook 4a2, the lower right hook 5a1, and the upper right hook 5a2 have largely the same structure, each including a straight rod portion 401 with a rectangular cross-section, a magnetic pole surface sliding contact portion 404, a magnetic pole surface attraction contact portion 405, a shaft hole portion 402, and a hook tip portion 403. However, the hook tips 403 of the lower left hook 4a1 and the lower right hook 5a1 employ a different hook design than those of the upper left hook 4a2 and the upper right hook 5a2.

[0041] See Figure 5 As shown, in the lower left hook 4a1, the shaft hole 402 is disposed on the left side of the bottom end of the straight rod 401 through the magnetic pole surface sliding contact 404, and the hook tip 403 is disposed on the right side of the top end of the straight rod 401 through the magnetic pole surface attraction contact 405. The hook tip 403 and the magnetic pole surface attraction contact 405 are both on the right side of the lower left hook shaft, and the hook tip 403 has a "lifting hook" structure with an opening to the upper right.

[0042] See Figure 5 As shown, in the upper left hook 4a2, the shaft hole 402 is disposed on the right side of the top end of the straight rod 401 through the magnetic pole surface sliding contact part 404, and the hook tip 403 is disposed on the right side of the bottom end of the straight rod 401 through the magnetic pole surface attraction contact part 405. The hook tip 403 and the magnetic pole surface attraction contact part 405 are both on the left side of the upper left hook shaft, and the hook tip 403 has a "lifting hook" structure with an opening to the upper right.

[0043] See Figure 6As shown, in the lower right hook 5a1, the shaft hole 402 is provided on the right side of the bottom end of the straight rod 401 through the magnetic pole surface sliding contact 404, and the hook tip 403 is provided on the left side of the top end of the straight rod 401 through the magnetic pole surface attraction contact 405. The hook tip 403 and the magnetic pole surface attraction contact 405 are both on the left side of the lower right hook shaft, and the hook tip 403 has a "lifting hook" structure with an opening to the upper left.

[0044] See Figure 6 As shown, in the upper right hook 5a2, the shaft hole 402 is disposed on the left side of the top end of the straight rod 401 through the magnetic pole surface sliding contact part 404, and the hook tip 403 is disposed on the left side of the bottom end of the straight rod 401 through the magnetic pole surface attraction contact part 405. The hook tip 403 and the magnetic pole surface attraction contact part 405 are both on the right side of the upper right hook shaft, and the hook tip 403 has a "lifting hook" structure with an opening to the upper left.

[0045] See Figure 6 As shown, taking the combination of the upper electromagnet 3b and the upper right armature hook 5a2 as an example, after assembly, the magnetic pole surface sliding contact part 404 is tightly embedded in the groove formed by the sliding magnetic pole surface 304, the magnetically conductive plastic cover 306, and the magnetically conductive elastic element 307, and the magnetic pole surface attracting contact part 405 is laterally aligned with the attracting magnetic pole surface 305. When the magnetic pole surface attracting contact part 405 is in contact with the attracting magnetic pole surface 305, three sides of the magnetic pole surface sliding contact part 404 are in contact with the sliding magnetic pole surface 304, the magnetically conductive plastic cover 306, and the magnetically conductive elastic element 307, respectively, so that the sliding magnetic pole surface 304, the magnetic pole surface sliding contact part 404, the straight rod part 401, the magnetic pole surface attracting contact part 405, and the attracting magnetic pole surface 305 constitute the closed magnetic circuit.

[0046] The shaft hole portion 402 is located outside the closed magnetic circuit and does not participate in the magnetic conduction path of the closed magnetic circuit. This design not only allows the magnetic pole face attraction contact portion 405 of the armature hook to be aligned with the attraction magnetic pole face 305 of the I-core 301 in height, so that when the magnetic circuit is closed, the magnetic pole face attraction contact portion 405 of the armature hook can be in close contact with the end face of the attraction magnetic pole face 305 of the I-core 301, but also allows the magnetic pole face sliding contact portion 404 of the armature hook to maintain sliding contact with the sliding magnetic pole face 304 of the I-core 301 when the armature hook rotates around the axis at a certain angle, thus maintaining a low magnetic resistance magnetic circuit connection.

[0047] The magnetic pole of the armature hook of the present invention can move between three positions: from the static magnetic gap to the dynamic magnetic gap is a segment with a large stroke, which is achieved by the convex edge of the vertical hook pushing the armature hook to move laterally when the vertical hook moves upward (using external force to achieve a large stroke displacement); from the dynamic magnetic gap to the closed magnetic circuit position is a segment with a small stroke, which is achieved by the electromagnetic force after the electromagnet is energized (using internal force to achieve a small stroke displacement).

[0048] See Figure 7 As shown, the pulley block unit also includes a double-layer pulley block groove plate, which is formed by the front and rear splicing of a first clamping piece 11 and a second clamping piece 12. The front groove plate of the first clamping piece 11 has three functional sections from top to bottom: a double-layer lower pulley block upper pulley groove section, a double-layer lower pulley block pulley sliding groove section, and a double-layer lower pulley block lower pulley line groove section. The back groove plate of the first clamping piece 11 also has three functional sections from top to bottom: a double-layer upper pulley block upper pulley groove section, a double-layer upper pulley block pulley sliding groove section, and a double-layer upper pulley block lower pulley line groove section.

[0049] The grooved section of the upper pulley of the lower pulley assembly corresponds front-to-back with the grooved section of the upper pulley assembly. The thickest pulley support section of the grooved section of the upper pulley assembly is located at the center of the first clamping plate 11, while the grooved section of the upper pulley of the lower pulley assembly is located on both sides of the first clamping plate 11. They do not conflict spatially and can be nested. The grooved section of the lower pulley assembly corresponds front-to-back with the grooved section of the lower pulley of the upper pulley assembly. The grooved section of the lower pulley assembly is located on both sides of the first clamping plate 11 and does not conflict with the pulley support section of the grooved section of the lower pulley assembly located at the center of the first clamping plate 11. The grooved sections of the upper and lower pulley assemblies are designed to be staggered vertically on both sides, and the grooved sections of the upper and lower pulley assemblies have the same thickness, providing space for the subsequent staggered installation of the upper and lower pulley assemblies.

[0050] The left front vertical hook 6a1 and the right front vertical hook 6b1 are respectively slidably disposed in the left front vertical hook guide rail 4c1 and the right front vertical hook guide rail 5c1. The double-layer sliding wheel assembly 7a is slidably disposed in the double-layer sliding wheel assembly pulley groove section. The two ends of the upper pulley line of the double-layer sliding wheel assembly 7a pass through the upper pulley line groove section of the double-layer sliding wheel assembly and are respectively connected to the bottom ends of the left front vertical hook 6a1 and the right front vertical hook 6b1. The two ends of the lower pulley line of the double-layer sliding wheel assembly 7a pass through the lower pulley line groove section of the double-layer sliding wheel assembly and are fixed at one end, and the other end is connected to the first head line connector 13. The left front vertical hook 6a1 and the right front vertical hook 6b1 drive the double-layer sliding wheel assembly 7a to rise and fall within the double-layer sliding wheel assembly pulley groove section as the knife is lifted and lowered.

[0051] Similarly, the left rear vertical hook 6a2 and the right rear vertical hook 6b2 are respectively slidably disposed in the left rear vertical hook guide rail 4d1 and the right rear vertical hook guide rail 5d1. The double-layer upper pulley group 7b is slidably disposed in the pulley groove section of the double-layer upper pulley group. The two ends of the upper pulley line of the double-layer upper pulley group 7b pass through the upper pulley line groove section of the double-layer upper pulley group and are respectively connected to the bottom ends of the left rear vertical hook 6a2 and the right rear vertical hook 6b2. The two ends of the lower pulley line of the double-layer upper pulley group 7b pass through the lower pulley line groove section of the double-layer upper pulley group and are fixed at one end, and the other end is connected to the second head line connector 14. The left rear vertical hook 6a2 and the right rear vertical hook 6b2 move up and down with the lifting of the knife, causing the double-layer upper pulley group 7b to move up and down in the pulley groove section of the double-layer upper pulley group.

[0052] The double-layer pulley system groove plate assembles the double-layer upper pulley group 7b and its upper and lower pulley lines, the double-layer lower pulley group 7a and its upper and lower pulley lines, the left front vertical hook 6a1, the left rear vertical hook 6a2, the right front vertical hook 6b1, the right rear vertical hook 6b2, the first head wire connector 13, and the second head wire connector 14 into a whole and fixes them with fasteners. Furthermore, the double-layer upper pulley group 7b and the double-layer lower pulley group 7a are stacked in a staggered manner within the same double-layer pulley system groove plate through the front and rear concave-convex design of the pulley groove sections of the double-layer lower pulley group and the double-layer upper pulley group.

[0053] The front of the second clamping piece 12 is designed with a front groove that matches the upper pulley line groove section, the lower pulley slide groove section, and the lower pulley line groove section of the lower pulley assembly on the back of the first clamping piece 11. The back of the second clamping piece 12 is designed with a back groove that matches the upper pulley line groove section, the upper pulley slide groove section, and the lower pulley line groove section of the upper pulley assembly on the front of the first clamping piece 11.

[0054] Both the first clip 11 and the second clip 12 are plastic parts that are injection molded in one piece. The front and back sides of the first clip 11 and the second clip 12 are respectively provided with buckles. The rear side of the second clip 12 and the front side of the first clip 11 can be stacked and spliced ​​together by the corresponding buckles.

[0055] Furthermore, the lower side end face of the first clip 11 and the lower side end face of the second clip 12 are respectively provided with positioning notches for judging whether the two are correctly assembled. When the first clip 11 and the second clip 12 are both assembled with the correct side groove shape facing each other, the positioning notch on the first clip 11 and the positioning notch on the second clip 12 are closely fitted together.

[0056] Through the concave-convex structure design of the first clamping piece 11 disclosed above, and the cooperation of the two second clamping pieces 12, the two sets of lifting pulleys are stacked in a staggered manner on the front and back sides of the first clamping piece 11. Thus, without increasing the width and thickness of the substrate, two needle selection units can be accommodated in one substrate. That is, the two needle selection units only occupy the same width (35mm) and thickness (5mm) as the original needle selection unit.

[0057] Because of the unique internal design of the double-layer pulley block groove plate of the present invention, it is possible to accommodate two sets of pulley blocks with the same structure, namely the double-layer upper pulley block 7b and the double-layer lower pulley block 7a, without increasing the thickness of the groove plate.

[0058] Because this invention uses two symmetrically arranged electromagnets and two pairs of armature hooks with different hook designs, the front and rear pairs of vertical hooks of this invention can adopt the same shape, namely a pair of left front vertical hooks 6a1 and right front vertical hooks 6b1 and a pair of left rear vertical hooks 6a2 and right rear vertical hooks 6b2.

[0059] See Figure 8 and Figure 9 As shown, the left front vertical hook 6a1, the left rear vertical hook 6a2, the right front vertical hook 6b1, and the right rear vertical hook 6b2 have the same structure, each including a rod-shaped body 601. The middle of the outer side of the rod-shaped body 601 is provided with a side ear 602 for hooking with the blade of the lifting knife. The top of the inner side of the rod-shaped body 601 is provided with a top hook 603, and the hook tip of the top hook 603 is close to the inner edge of the rod-shaped body 601, and the hook bottom of the top hook 603 is close to the axis of the rod-shaped body 601.

[0060] A raised edge is provided on the upper edge of the inner side of the rod-shaped body 601, below the top hook portion 603. This raised edge, when the vertical hook moves upward, laterally pushes the corresponding armature hook from a static magnetic gap position away from the electromagnet to a dynamic magnetic gap position closer to the electromagnet and maintains it in the dynamic magnetic gap position. The raised edge protrudes laterally from the hook tip of the top hook portion 603. The contour curve of the raised edge is divided into a pushing section 604a in the upper section and a holding section 604b in the lower section. The pushing section 604a is an inclined curve starting from the bottom of the hook of the top hook portion 603, and the holding section 604b is a straight line parallel to the moving direction of the rod-shaped body 601. The pushing section 604a and the holding section 604b are smoothly connected. In the initial stage of the upward movement of the vertical hook, the pushing section 604a can generate an outward lateral pushing force on the armature hook in contact with it. In the middle and later stages of the upward movement of the vertical hook, the holding section 604b can apply a holding force to the armature hook that has already undergone lateral displacement.

[0061] The distance from the bottom of the retaining section 604b to the bottom of the top hook 603 is greater than the distance from the tip of the top hook 603 to the bottom of the top hook 603. This distance difference is also the distance between the tip of the armature hook and the tip of the vertical hook in the disengaged state, and is therefore defined as the disengagement allowance, which is a tolerance margin. See also Figure 8 As shown, Figure 7 D represents the unhooking allowance. Due to the existence of the unhooking allowance D, the hook tip of the armature hook does not contact the top hook of the vertical hook. Even if vibration or other situations occur, the top hook of the vertical hook will not catch the hook tip of the armature hook, thus avoiding the failure to unhook. The unhooking allowance ensures the reliability of the unhooking action under complex working conditions.

[0062] The length of the retaining section 604b of the convex edge corresponds to the tolerance range of the jacquard machine's lifting height allowed by its needle selection device. Within this tolerance range, the armature hook in contact with the convex edge remains in the dynamic magnetic gap position. The retaining section 604b is actually a straight section, and the armature hook in contact with it within this section of the retaining section 604b will not have lateral displacement, but will remain in the dynamic magnetic gap position. The dynamic magnetic gap is the distance between the magnetic pole surface of the armature hook and the magnetic pole surface of the electromagnet under the action of the convex edge, and the value range of the dynamic magnetic gap is 0~0.3mm.

[0063] The inner middle and lower parts of the rod-shaped body 601 are provided with a limiting protrusion 605 along its edge, which is used to fit into the corresponding groove on the first clamping piece 11 and ensure that the vertical hook does not have lateral displacement. The top end of the limiting protrusion 605 is parallel to the bottom end of the protrusion retaining section 604b. Since the vertical hook is set in the corresponding vertical hook guide rail, the vertical hook needs to have a matching rod-shaped body 601 to ensure that there is no lateral displacement when the vertical hook moves up and down in the vertical hook guide rail. Since the dynamic magnetic gap is generated by the protrusion and has certain precision requirements, in order to ensure precision, it is necessary to ensure that the vertical hook movement trajectory is stable and that there is no other lateral displacement while the vertical hook moves up and down; otherwise, the size of the dynamic magnetic gap cannot be controlled.

[0064] At least one damping groove 606 is provided between the side ear portion 602 and the rod-shaped body 601 to block the vibration of the lifting knife, so as to prevent the vibration of the lifting knife from being transmitted to the top hook portion 603 through the side ear portion 602 and improve the reliability of the operation. The number of damping grooves 606 can be designed according to the requirements, for example, it can be designed as follows: Figure 8 The single-slot design shown can also be designed as follows: Figure 9 The dual-slot design is shown.

[0065] The hooking methods of the left front vertical hook 6a1 and the left lower bit hook 4a1, the hooking methods of the right front vertical hook 6b1 and the right lower bit hook 5a1, the hooking methods of the left rear vertical hook 6a2 and the left upper bit hook 4a2, and the hooking methods of the right rear vertical hook 6b2 and the right upper bit hook 5a2 are the same, and the principle is as follows: When the vertical hook moves upward, the pushing section of the upper convex edge of the vertical hook laterally pushes the armature hook in contact with it to rotate around the corresponding axis. The magnetic pole surface attraction contact 405 of the armature hook moves from the static magnetic gap position away from the magnetic pole surface 305 of the electromagnet to the direction closer to the magnetic pole surface 305 of the electromagnet. The holding section of the convex edge keeps the magnetic pole surface attraction contact 405 of the armature hook in the dynamic magnetic gap position close to the magnetic pole surface 305 of the electromagnet. If the coil of the electromagnet is energized at this time, the electromagnetic force will attract the magnetic pole surface attraction contact 405 of the armature hook to the closed magnetic circuit position. The holding section of the convex edge will not generate a force for the lateral displacement of the armature hook. At this time, the return torsion spring is compressed, thereby causing the hook tip of the armature hook to disengage from the top hook of the vertical hook, and it is in a disengaged state. Since the electromagnetic force is greater than the elastic force of the return torsion spring, when the vertical hook moves downward, even without the action of the upper convex edge of the vertical hook, the armature hook will be kept in the closed magnetic circuit position by electromagnetic force. As the vertical hook continues to descend until its tip aligns with the tip of the armature hook, the presence of a release allowance ensures that the vertical hook can smoothly descend below the armature hook, achieving reliable release. This is a new release technology that uses release allowance parameters designed in the design phase to guarantee operational reliability under complex working conditions.

[0066] When the vertical hook descends and the electromagnet's coil is not energized, the electromagnet's magnetic pole surface 305 does not generate an attraction force on the armature hook's magnetic pole surface contact 405. The reset torsion spring will give the armature hook an outward elastic force. When the vertical hook descends to the point where its top hook part aligns with the armature hook's hook tip, the reset torsion spring gains release space, causing the armature hook's magnetic pole surface contact 405 to rotate directly from the closed magnetic circuit position through the dynamic magnetic gap position to the static magnetic gap position. At this time, the armature hook's hook tip is just engaged with the top hook part of the vertical hook, thus making the armature hook's hook tip and the top hook part of the vertical hook connected, forming a hook state.

[0067] See Figure 1 As shown, the mounting bracket consists of a left front mounting plate 901, a left rear mounting plate 902, a right front mounting plate 903, and a right rear mounting plate 904. The left armature hook plate is fixed to the left load-bearing fixed shaft 15 through the assembled upper fixing hole 17, and the right armature hook plate is fixed to the right load-bearing fixed shaft 16 through the assembled upper fixing hole 17. The drive printed circuit board 10 is inserted into the slot at the top of the electromagnet plate 3.

[0068] The left front mounting plate 901 is attached to the front end face of the assembled left armature hook plate 4, and the top end of the left front mounting plate 901 is fixedly connected to the front left side face of the drive printed circuit board 10, and the bottom end of the left front mounting plate 901 is fixedly connected to the front left side face of the assembled pulley assembly plate 7.

[0069] The left rear mounting plate 902 is attached to the rear end face of the assembled left armature hook plate 4, and the top end of the left rear mounting plate 902 is fixedly connected to the rear left side face of the drive printed circuit board 10, and the bottom end of the left rear mounting plate 902 is fixedly connected to the rear left side face of the assembled pulley assembly plate 7.

[0070] The right front mounting plate 903 is attached to the front end face of the assembled right armature hook plate 5, and the top end of the right front mounting plate 903 is fixedly connected to the front right side face of the drive printed circuit board 10, and the bottom end of the right front mounting plate 903 is fixedly connected to the front right side face of the assembled pulley assembly plate 7.

[0071] The right rear mounting plate 904 is attached to the rear end face of the assembled right bit hook plate 5, and the top end of the right rear mounting plate 904 is fixedly connected to the rear right side face of the drive printed circuit board 10, and the bottom end of the right rear mounting plate 904 is fixedly connected to the rear right side face of the assembled pulley assembly plate 7; positioning mounting parts for cooperating with the needle box are installed on both sides of the pulley assembly plate 7.

[0072] To facilitate installation and maintenance, different mounting bracket schemes are available. For example, the left front mounting plate 901 and the right front mounting plate 903 can be combined into one component, and the left rear mounting plate 902 and the right rear mounting plate 904 can be combined into one component. Further details will not be provided.

[0073] The number of electromagnet units, pulley block units, left bit hook units, and right bit hook units is a large multiple of 8. (See also...) Figure 1 and Figure 2 As shown, for example, there can be 8×8 units, thus forming a large component of a 128-pin high-density needle selection device.

[0074] See Figure 1 As shown, Figure 1 The invention showcases an electromagnet plate composed of 64 electromagnet units, a left hook plate composed of 64 left hook units, and a right hook plate composed of 64 right hook units. This separate design isolates vibration. Vibration primarily originates from the frame and the lifting blade; the lifting blade vibration is transmitted to the needle selection device via the vertical hook. The mounting bracket of this invention not only provides positioning and fixing for the left hook plate, right hook plate, drive printed circuit board, and electromagnet plate, but should also be designed to fit the needle box of the jacquard machine.

[0075] See Figure 2 As shown, Figure 2 The image shows a pulley block plate consisting of 64 pulley units. This is a separate component, completely independent of the electromagnet plate. The pulley block plate can be positioned and installed into the jacquard machine needle box using mounting hardware. Typically, the pulley section of an electronic jacquard machine rarely fails during the first 1-2 years of operation. The separate, large-component design simplifies and speeds up initial maintenance, as only the electromagnet section needs to be disassembled, while the pulley sections remain stationary. However, the pulley section is connected to the threaded rod, making disassembly and reassembly relatively labor-intensive during use.

[0076] From a manufacturing perspective, the clamping piece is a relatively long plastic sheet structure. Separating it offers at least two advantages: First, the absence of the electromagnet reduces the overall size, lowering mold costs and reducing manufacturing difficulty and costs. Second, the separated clamping piece is not subjected to force along its length, i.e., the direction of the lifting motion, thus placing less emphasis on its strength and rigidity; good wear resistance and self-lubricating properties are sufficient. Materials with good elasticity and toughness can be used, minimizing the risk of cracking during manufacturing, assembly, and use. Furthermore, the pulley line moves within the groove formed by the clamping piece, creating a relatively enclosed environment, which is beneficial in preventing lint and dust contamination during the weaving process.

[0077] This large-component design is more advantageous for printed circuit board (PCB) design. Existing solutions require many small boards connected by cables and connectors, which increases circuit unreliability. This invention integrates a large number of pin selection devices into a single PCB driver, reducing costs and improving reliability.

[0078] It should be noted that the technical solution of the present invention is not limited to manufacturing a large component of a 128-needle high-density needle selection device, but can also be used to manufacture a large component of a needle selection device with even higher density.

[0079] The present invention also provides an electronic jacquard machine employing the above-mentioned high-density split needle selection device large component.

[0080] In summary, this invention provides a solution for a high-density, separate needle selection device assembly, breaking away from the current functional sheet composition scheme. The functional sheet is separated into several components. These components cannot perform the function of the needle selection device on their own, but by combining a large number of these components together and installing them on the needle box, a needle selection device assembly with a large number of needles can be realized, achieving positive effects such as facilitating production, reducing costs, improving performance, increasing reliability, and facilitating maintenance.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A large component of a high-density, separate needle selection device, characterized in that: The system includes an electromagnet plate (3) composed of 8n electromagnet units stacked front to back, a pulley block plate (7) composed of 8n pulley block units stacked front to back, a left hook plate (4) composed of 8n left hook units stacked front to back, a right hook plate (5) composed of 8n right hook units stacked front to back, a mounting frame, and a drive printed circuit board (10), where n is a positive integer and n≥8; the electromagnet plate, the left hook plate, the right hook plate, and the drive printed circuit board (10) are assembled into a whole by the mounting frame and then installed on the top of the pulley block plate; each electromagnet unit is installed above its corresponding pulley block unit using a longitudinally separated design, and each left hook unit and each right hook unit are installed on the left and right sides of their respective electromagnet unit using a laterally separated design; The electromagnet unit includes an upper electromagnet (3b) and a lower electromagnet (3a); the left armature hook unit includes an upper left armature hook (4a2) for engaging with the left magnetic pole face of the upper electromagnet (3b) along with its shaft and a return torsion spring, and a lower left armature hook (4a1) for engaging with the left magnetic pole face of the lower electromagnet (3a) along with its shaft and a return torsion spring; the right armature hook unit includes an upper right armature hook (5a2) for engaging with the right magnetic pole face of the upper electromagnet (3b) along with its shaft and a return torsion spring, and a lower right armature hook (5a1) for engaging with the right magnetic pole face of the lower electromagnet (3a). The pulley unit includes a double-layer upper pulley group (7b) and a double-layer lower pulley group (7a). The upper pulley line of the double-layer upper pulley group (7b) is connected upward to a left rear vertical hook (6a2) for cooperating with the left upper bit hook (4a2) and a right rear vertical hook (6b2) for cooperating with the right upper bit hook (5a2). The upper pulley line of the double-layer lower pulley group (7a) is connected upward to a left front vertical hook (6a1) for cooperating with the left lower bit hook (4a1) and a right front vertical hook (6b1) for cooperating with the right lower bit hook (5a1).

2. The high-density separation needle selection device large component according to claim 1, characterized in that: The electromagnet unit also includes an electromagnet frame (1). The upper electromagnet (3b) and the lower electromagnet (3a) are respectively installed at the upper and lower ends of the electromagnet frame (1). The upper electromagnet (3b) and the lower electromagnet (3a) are arranged symmetrically. A printed circuit board slot plate (2) is provided at the top of the electromagnet frame (1). A printed circuit board slot (201) is opened at the top of the printed circuit board slot plate (2). Coil pins (202) for connecting the coils of the upper electromagnet (3b) and the lower electromagnet (3a) are provided on the left and right sides of the printed circuit board slot plate (2). A lower buckle (101) is provided on the front of the middle part of the electromagnet frame (1). The back of the middle part of the skeleton (1) is provided with a lower slot. The lower buckle (101) is positioned in front of and behind the lower slot and matches the size. The front of the printed circuit board slot plate (2) is provided with an upper buckle (203). The back of the printed circuit board slot plate (2) is provided with an upper slot. The upper buckle (203) is positioned in front of and behind the upper slot and matches the size. The middle part of the electromagnet skeleton (1) is provided with a through hole (102). Two adjacent electromagnet skeletons (1) are spliced ​​together by the cooperation of the upper buckle (203) and the lower slot and the cooperation of the lower buckle (101) and the lower slot. The skeleton is fixed by the cooperation of the corresponding fasteners with the through hole (102) after splicing.

3. The high-density, separate needle selection device large component according to claim 1, characterized in that: The upper electromagnet (3b) and the lower electromagnet (3a) have the same structure, both consisting of an I-beam core (301) with enameled wire wound around it. One end of the I-beam core (301) is a long magnetic pole (302), and the other end is a short magnetic pole (303). The long magnetic pole (302) has a first bend that curves backward at both ends, and the short magnetic pole (303) has a second bend that curves forward at both ends. The first bend and the second bend are offset from each other, and the offset is equal to the thickness of the armature hook. The concave surface of the bend serves as the sliding magnetic pole surface (304), and the side end face of the second bend serves as the attracting magnetic pole surface (305). The sliding magnetic pole surface (304) and the attracting magnetic pole surface (305) located on the same side constitute two intersecting magnetic pole surfaces. A magnetically conductive plastic cover (306) is provided in front of the sliding magnetic pole surface (304). There is a gap between the magnetically conductive plastic cover (306) and the sliding magnetic pole surface (304) to form a groove for easy insertion of the armature hook. A magnetically conductive elastic element (307) for contacting the armature hook is provided in the groove.

4. The high-density, separate needle selection device large component according to claim 1, characterized in that: The left bit hook unit also includes a left front partition (4c) and a left rear partition (4d) that can be assembled together. The front of the left front partition (4c) is provided with a left front vertical hook guide rail (4c1) for the left front vertical hook (6a1) to slide up and down. The lower part of the left front partition (4c) is provided with a left lower hook shaft hole (4c2) and a left lower torsion spring hole (4c3). The lower part of the left rear partition (4d) is provided with a left lower hook pivot (4d2) that can cooperate with the left lower hook shaft hole (4c2) and a left lower torsion spring pivot (4d3) that can cooperate with the left lower torsion spring hole (4c3). The left lower bit hook (4a1) and its left lower return torsion spring (4a3) are located on the left front partition (4c). The left lower bit hook (4a1) is located on the front side of the left front vertical hook guide rail (4c1) and to the left side of the left front vertical hook guide rail (4d2). The shaft hole of the left lower bit hook (4a1) is rotatably connected to the left lower hook shaft (4d2) that passes through the left lower hook shaft hole (4c2). The lower end of the left lower return torsion spring (4a3) is rotatably connected to the left lower torsion spring shaft (4d3) that passes through the left lower torsion spring hole (4c3). The upper end of the left lower return torsion spring (4a3) is hooked to the left side of the middle part of the left lower bit hook (4a1). The hook tip of the left lower bit hook (4a1) can be kept extending to the right into the left front vertical hook guide rail (4c1) under the action of the restoring force of the left lower return torsion spring (4a3). The front side of the left rear partition plate (4d) is provided with a useful... The left rear vertical hook guide rail (4d1) slides up and down on the left rear vertical hook (6a2). The upper part of the left front partition (4c) is provided with a left upper hook shaft hole (4c4) and a left upper torsion spring hole (4c5). The upper part of the left rear partition (4d) is provided with a left upper hook shaft (4d4) that can cooperate with the left upper hook shaft hole (4c4) and a left upper torsion spring shaft (4d5) that can cooperate with the left upper torsion spring hole (4c5). The left upper armature hook (4a2) and its left upper return torsion spring (4a4) are located on the front of the left rear partition (4d) and on the left side of the left rear vertical hook guide rail (4d1). The shaft hole of the left upper armature hook (4a2) and the left upper return torsion spring (4a4) after passing through the left upper hook shaft hole (4c4) are connected. The upper left hook shaft (4d4) is rotatably connected, and the upper end of the upper left return torsion spring (4a4) is rotatably connected to the upper left torsion spring shaft (4d5) after passing through the upper left torsion spring hole (4c5). The lower end of the upper left return torsion spring (4a4) is hooked to the left side of the middle part of the upper left armature hook (4a2). The hook tip of the upper left armature hook (4a2) can be kept extending to the right into the left rear vertical hook guide rail (4d1) under the action of the restoring force of the upper left return torsion spring (4a4). The top of the left front partition (4c) and the left rear partition (4d) are both provided with upper fixing holes (17), and the bottom of the left front partition (4c) and the left rear partition (4d) are both provided with lower fixing holes (18).The left front partition (4c) and the left rear partition (4d) are joined together by the cooperation of the left lower hook shaft (4d2) with the left lower hook shaft hole (4c2), the left lower torsion spring shaft (4d3) with the left lower torsion spring hole (4c3), the left upper hook shaft (4d4) with the left upper hook shaft hole (4c4), and the left upper torsion spring shaft (4d5) with the left upper torsion spring hole (4c5); and two adjacent left hook units are fixed by the cooperation of corresponding fasteners with the upper fixing hole (17) and the lower fixing hole (18) after the joint. The right armature hook unit also includes a right front partition (5c) and a right rear partition (5d) that can be assembled together. The front of the right front partition (5c) is provided with a right front vertical hook guide rail (5c1) for the right front vertical hook (6b1) to slide up and down. The lower part of the right front partition (5c) has a right lower hook shaft hole (5c2) and a right lower torsion spring hole (5c3). The lower part of the right rear partition (5d) has a right lower hook pivot (5d2) that mates with the right lower hook shaft hole (5c2) and a right lower torsion spring pivot (5d3) that mates with the right lower torsion spring hole (5c3). The right lower armature hook (5a1) and its right lower return torsion spring (5a3) are located on the right front partition (5c). The right lower bit hook (5a1) is located on the front side of the right front vertical hook guide rail (5c1) and to the left. The shaft hole of the right lower bit hook (5a1) is rotatably connected to the right lower hook shaft (5d2) that passes through the right lower hook shaft hole (5c2). The lower end of the right lower return torsion spring (5a3) is rotatably connected to the right lower torsion spring shaft (5d3) that passes through the right lower torsion spring hole (5c3). The upper end of the right lower return torsion spring (5a3) is hooked to the left side of the middle part of the right lower bit hook (5a1). The hook tip of the right lower bit hook (5a1) can be kept extending to the right into the right front vertical hook guide rail (5c1) under the action of the restoring force of the right lower return torsion spring (5a3). The front side of the right rear partition plate (5d) is provided with a useful... The right rear vertical hook guide rail (5d1) slides up and down on the right rear vertical hook (6b2). The upper part of the right front partition (5c) has a right upper hook shaft hole (5c4) and a right upper torsion spring hole (5c5). The upper part of the right rear partition (5d) has a right upper hook pivot (5d4) that mates with the right upper hook shaft hole (5c4) and a right upper torsion spring pivot (5d5) that mates with the right upper torsion spring hole (5c5). The right upper armature hook (5a2) and its right upper return torsion spring (5a4) are located on the front of the right rear partition (5d) and to the left of the right rear vertical hook guide rail (5d1). The shaft hole of the right upper armature hook (5a2) and the upper right return torsion spring (5a4) pass through the right upper hook shaft hole (5c4). The upper right hook shaft (5d4) is rotatably connected, and the upper end of the upper right return torsion spring (5a4) is rotatably connected to the upper right torsion spring shaft (5d5) after passing through the upper right torsion spring hole (5c5). The lower end of the upper right return torsion spring (5a4) is hooked to the left side of the middle part of the upper right armature hook (5a2). The hook tip of the upper right armature hook (5a2) can be kept extending to the right into the right rear vertical hook guide rail (5d1) under the action of the restoring force of the upper right return torsion spring (5a4). The top of the upper right front partition (5c) and the upper right rear partition (5d) are both provided with upper fixing holes (17), and the bottom of the upper right front partition (5c) and the upper right rear partition (5d) are both provided with lower fixing holes (18).The right front partition (5c) and the right rear partition (5d) are joined together by the engagement of the right lower hook shaft (5d2) with the right lower hook shaft hole (5c2), the right lower torsion spring shaft (5d3) with the right lower torsion spring hole (5c3), the right upper hook shaft (5d4) with the right upper hook shaft hole (5c4), and the right upper torsion spring shaft (5d5) with the right upper torsion spring hole (5c5); and adjacent right bit hook units are fixed by corresponding fasteners engaging with the joined upper fixing hole (17) and lower fixing hole (18).

5. The high-density, separate needle selection device large component according to claim 4, characterized in that: The lower left armature hook (4a1), the upper left armature hook (4a2), the lower right armature hook (5a1), and the upper right armature hook (5a2) each include a straight rod portion (401) with a rectangular cross-section, a magnetic pole surface sliding contact portion (404), a magnetic pole surface attraction contact portion (405), a shaft hole portion (402), and a hook tip portion (403). In the lower left armature hook (4a1), the shaft hole (402) is provided on the left side of the bottom end of the straight rod (401) through the magnetic pole surface sliding contact (404), and the hook tip (403) is provided on the right side of the top end of the straight rod (401) through the magnetic pole surface attraction contact (405). The hook tip (403) and the magnetic pole surface attraction contact (405) are both on the right side of the lower left hook shaft, and the hook tip (403) has a "lifting hook" structure with an opening to the upper right. When the lower electromagnet (3a) is energized, the magnetic pole surface sliding contact (404) and the magnetic pole surface attraction contact (405) can contact the two magnetic pole surfaces on the left side of the lower electromagnet (3a) to form a lower left closed magnetic circuit, and the shaft hole (402) is located outside the lower left closed magnetic circuit. In the upper left armature hook (4a2), the shaft hole (402) is provided on the right side of the top of the straight rod (401) through the magnetic pole surface sliding contact (404), and the hook tip (403) is provided on the right side of the bottom of the straight rod (401) through the magnetic pole surface attraction contact (405). The hook tip (403) and the magnetic pole surface attraction contact (405) are both on the left side of the upper left hook shaft, and the hook tip (403) has a "lifting hook" structure with an opening to the upper right. When the upper electromagnet (3b) is energized, the magnetic pole surface sliding contact (404) and the magnetic pole surface attraction contact (405) can contact the two magnetic pole surfaces on the left side of the upper electromagnet (3b) to form an upper left closed magnetic circuit, and the shaft hole (402) is located outside the upper left closed magnetic circuit. In the lower right armature hook (5a1), the shaft hole (402) is provided on the right side of the bottom end of the straight rod (401) through the magnetic pole surface sliding contact (404), and the hook tip (403) is provided on the left side of the top end of the straight rod (401) through the magnetic pole surface attraction contact (405). The hook tip (403) and the magnetic pole surface attraction contact (405) are both on the left side of the lower right hook shaft, and the hook tip (403) has a "lifting hook" structure with an opening to the upper left. When the lower electromagnet (3a) is energized, the magnetic pole surface sliding contact (404) and the magnetic pole surface attraction contact (405) can contact the two magnetic pole surfaces on the right side of the lower electromagnet (3a) to form a lower right closed magnetic circuit, and the shaft hole (402) is located outside the lower right closed magnetic circuit. In the upper right armature hook (5a2), the shaft hole (402) is provided on the left side of the top of the straight rod (401) through the magnetic pole surface sliding contact (404), and the hook tip (403) is provided on the left side of the bottom of the straight rod (401) through the magnetic pole surface attraction contact (405). The hook tip (403) and the magnetic pole surface attraction contact (405) are both on the right side of the upper right hook shaft, and the hook tip (403) has a "lifting hook" structure with an opening to the upper left. When the upper electromagnet (3b) is energized, the magnetic pole surface sliding contact (404) and the magnetic pole surface attraction contact (405) can contact the two magnetic pole surfaces on the right side of the upper electromagnet (3b) to form a closed magnetic circuit on the upper right, and the shaft hole (402) is located outside the closed magnetic circuit on the upper right.

6. The high-density, separate needle selection device large component according to claim 1, characterized in that: The pulley block unit also includes a double-layer pulley block groove plate, which is formed by the front and rear splicing of a first clamping piece (11) and a second clamping piece (12). The front groove plate of the first clamping piece (11) is provided with three functional sections from top to bottom: the upper pulley line groove section of the double-layer lower pulley block, the pulley sliding groove section of the double-layer lower pulley block, and the lower pulley line groove section of the double-layer lower pulley block. The back groove plate of the first clamping piece (11) is provided with three functional sections from top to bottom: the upper pulley line groove section of the double-layer upper pulley block, the pulley sliding groove section of the double-layer upper pulley block, and the lower pulley line groove section of the double-layer upper pulley block. The upper pulley groove section of the lower pulley group corresponds to the upper pulley groove section in front and behind, and the thickest pulley support section of the upper pulley groove section is located at the center of the first clamp (11), while the upper pulley groove section of the lower pulley group is located on both sides of the first clamp (11), and can be nested without spatial conflict; the lower pulley groove section corresponds to the lower pulley groove section of the upper pulley group in front and behind, and the lower pulley groove section of the upper pulley group is located on both sides of the first clamp (11), and does not conflict with the pulley support section of the lower pulley groove section of the lower pulley group located at the center of the first clamp (11); the upper pulley groove section and the lower pulley groove section are stacked in a staggered manner on both sides, and the upper pulley groove section and the lower pulley groove section have the same thickness; The left front vertical hook (6a1) and the right front vertical hook (6b1) are respectively slidably disposed on the left and right sides of the lower electromagnet (3a). The double-layer sliding wheel assembly (7a) is slidably disposed on the double-layer sliding wheel assembly pulley groove section. The two ends of the upper pulley line of the double-layer sliding wheel assembly (7a) pass through the upper pulley line groove section of the double-layer sliding wheel assembly and are respectively connected to the bottom ends of the left front vertical hook (6a1) and the right front vertical hook (6b1). The two ends of the lower pulley line of the double-layer sliding wheel assembly (7a) pass through the lower pulley line groove section of the double-layer sliding wheel assembly and are fixed at one end, and the other end is connected to the first head wire connector (13). The left front vertical hook (6a1) and the right front vertical hook (6b1) move up and down with the lifting of the knife, causing the double-layer sliding wheel assembly (7a) to move up and down within the double-layer sliding wheel assembly pulley groove section. The left rear vertical hook (6a2) and the right rear vertical hook (6b2) are respectively slidably arranged on the left and right sides of the upper electromagnet (3b). The double-layer upper pulley group (7b) is slidably arranged on the pulley groove section of the double-layer upper pulley group. The two ends of the upper pulley line of the double-layer upper pulley group (7b) pass through the upper pulley line groove section of the double-layer upper pulley group and are respectively connected to the bottom ends of the left rear vertical hook (6a2) and the right rear vertical hook (6b2). The two ends of the lower pulley line of the double-layer upper pulley group (7b) pass through the lower pulley line groove section of the double-layer upper pulley group and are fixed at one end, and the other end is connected to the second head wire connector (14). The left rear vertical hook (6a2) and the right rear vertical hook (6b2) move up and down with the lifting of the knife, causing the double-layer upper pulley group (7b) to move up and down within the pulley groove section of the double-layer upper pulley group. The double-layer pulley system groove plate assembles the double-layer upper pulley system (7b) and its upper and lower pulley lines, the double-layer lower pulley system (7a) and its upper and lower pulley lines, the left front vertical hook (6a1), the left rear vertical hook (6a2), the right front vertical hook (6b1), the right rear vertical hook (6b2), the first head wire connector (13), and the second head wire connector (14) into a whole and fixes them with fasteners; and the double-layer upper pulley system (7b) and the double-layer lower pulley system (7a) are stacked vertically and vertically on the same plane through the front and rear concave and convex design of the pulley groove section of the double-layer lower pulley system and the pulley groove section of the double-layer upper pulley system inside the double-layer pulley system groove plate.

7. The high-density, separate needle selection device large component according to claim 6, characterized in that: The left front vertical hook (6a1), the left rear vertical hook (6a2), the right front vertical hook (6b1), and the right rear vertical hook (6b2) have the same structure, each including a rod-shaped body (601). A side ear (602) for attaching to the blade edge is provided on the middle of the outer side of the rod-shaped body (601). A top hook (603) is provided at the top of the inner side of the rod-shaped body (601), with the hook tip of the top hook (603) close to the inner edge of the rod-shaped body (601), and the hook base of the top hook (603) close to the edge of the blade edge. The axis of the rod-shaped body (601) is described; a protruding edge is provided at the upper edge of the inner side of the rod-shaped body (601) and below the top hook (603). The protruding edge can laterally push the armature hook on the corresponding side from the static magnetic gap position away from the electromagnet to the dynamic magnetic gap position closer to the electromagnet and keep it in the dynamic magnetic gap position when the vertical hook moves upward. The protruding edge protrudes laterally from the hook tip of the top hook (603); the contour curve of the protruding edge is divided into a pushing section (604a) in the upper section and a holding section in the lower section. The push section (604a) is an inclined curve starting from the bottom of the hook of the top hook (603), and the holding section (604b) is a straight line parallel to the moving direction of the rod-shaped body (601). The push section (604a) and the holding section (604b) are smoothly connected. The distance from the bottom of the holding section (604b) to the bottom of the hook of the top hook (603) is greater than the distance from the tip of the hook of the top hook (603) to the bottom of the hook of the top hook (603). The length of the holding section (604b) of the convex edge is relative to... The tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs; the middle and lower parts of the inner side of the rod-shaped body (601) are provided with a limiting protrusion (605) for fitting into the corresponding groove on the first clamp (11) and ensuring that the vertical hook does not have lateral displacement, and the top of the limiting protrusion (605) is connected in a straight line parallel to the bottom of the protrusion retaining section (604b); at least one damping groove (606) for blocking the knife lifting vibration is opened between the side ear (602) and the rod-shaped body (601).

8. The high-density, separate needle selection device large component according to claim 1, characterized in that: The mounting bracket consists of a left front mounting plate (901), a left rear mounting plate (902), a right front mounting plate (903), and a right rear mounting plate (904). The left front mounting plate (901) is attached to the front end face of the assembled left bit hook plate (4), and the top end of the left front mounting plate (901) is fixedly connected to the front left side face of the drive printed circuit board (10). The bottom end of the left front mounting plate (901) is fixedly connected to the front left side face of the assembled pulley assembly plate (7). The left rear mounting plate (902) is attached to the rear end face of the assembled left bit hook plate (4), and the top end of the left rear mounting plate (902) is fixedly connected to the rear left side face of the drive printed circuit board (10). The bottom end of the left rear mounting plate (902) is fixedly connected to the rear left side face of the assembled pulley assembly plate (7). The right front mounting plate (903) is attached to the front end of the assembled right bit hook plate (5), and the top end of the right front mounting plate (903) is fixedly connected to the front right side of the drive printed circuit board (10), and the bottom end of the right front mounting plate (903) is fixedly connected to the front right side of the assembled pulley assembly plate (7); the right rear mounting plate (904) is attached to the rear end of the assembled right bit hook plate (5), and the top end of the right rear mounting plate (904) is fixedly connected to the rear right side of the drive printed circuit board (10), and the bottom end of the right rear mounting plate (904) is fixedly connected to the rear right side of the assembled pulley assembly plate (7); positioning mounting parts for cooperating with the needle box are installed on both sides of the pulley assembly plate (7).

9. An electronic jacquard machine employing a large component of a high-density, separate needle selection device as described in any one of claims 1-8.

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