A selection device with a springy armature hook, an assembly thereof and an electronic jacquard

Abstract

The application discloses a needle selecting device with elastic armature hook, an assembly thereof and an electronic jacquard machine, which comprises a base sheet, elastic armature hooks, electromagnets, vertical hooks and a pulley set. The electromagnets are made of I-shaped iron cores and coils and are arranged at the top middle part of the front face of the base sheet. Two elastic armature hooks are arranged at the left and right sides of the electromagnets respectively through elastic armature hook mounting blocks on the base sheet. Two vertical hooks are vertical hooks with protruding edges and are arranged in linear vertical hook guide rails on the two sides of the base sheet and located outside the two elastic armature hooks. The pulley set is arranged in a pulley set sliding groove in the middle part of the base sheet, and the pulley set is connected with the bottom ends of the two vertical hooks and the first thread joint through upper and lower pulley lines respectively. The elastic armature hook is made of multiple materials and has good elasticity, rigidity, wear resistance and magnetic permeability, which meets the high performance requirements of the armature hook material in all aspects, achieves the beneficial effects of simple structure, small coil power consumption, good product consistency, high reliability in long-term operation and low manufacturing cost.

Description

Technical Field

[0001] This invention belongs to the technical field of electronic jacquard machines in textile machinery, specifically relating to a needle selection device with an elastic armature hook and its components, and an electronic jacquard machine. Background Technology

[0002] In recent years, electronic jacquard machines have made significant progress. A key component of an electronic jacquard machine 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, similar to that of an electromagnetic relay; it is a monostable device: when the coil is not energized, there is no electromagnetic force, and it does not attract the armature. Under the action of the return spring, the armature's magnetic poles move away from the iron core's magnetic poles, and it is in position 1 (stable position); when the coil is energized, it generates electromagnetic force, attracting the armature, and the armature's magnetic poles attract the iron core's magnetic poles, placing the armature in position 2 (metastable position).

[0003] In the needle selection device, the armature is made into a hook shape, called the armature hook, and there is also a vertical hook that moves up and down with the jacquard machine's lifting knife. When the vertical hook is disengaged from the armature hook, it is called the "disengaged" state, and the vertical hook moves with the lifting knife; when the vertical hook is hooked onto the armature hook, it is called the "hooked" state, and the vertical hook is detached from the lifting knife and does not move with the lifting knife. Usually, it can be designed so that position 1 (steady-state position) is the "hooked" state and position 2 (temporarily steady-state position) is the "disengaged" state, or vice versa. Since the vertical hook connects the guide wire and heddle wire to control the warp yarn, the rise and fall of the vertical hook corresponds to the rise and fall of the warp yarn. Mass-produced commercial needle selection devices often integrate eight electromagnets and their corresponding mechanisms into a single assembly for easy installation and maintenance, called a component.

[0004] Jacquard looms are divided into single-action and double-action types. The double-action type has a more complex mechanism, with one jacquard needle corresponding to two vertical hooks. These two hooks are converted into the movement of one jacquard needle (first thread) via a pulley system. The double-action type causes less damage to the warp yarns, which is beneficial for weaving. Currently, most electronic jacquard looms are double-action. The two main jacquard looms on the market are manufactured by Staubli and Bonas, respectively.

[0005] The structure of the needle selection device for Staubli's jacquard machines consists of: an I-core coil, an armature hook made of soft iron, a rotating shaft, a spring, a vertical hook, a pulley block, a substrate, etc. Its advantages are a compact structure, low coil power consumption, and adaptability to high speeds. Its disadvantages are a complex mechanism, high manufacturing cost, high precision requirements for parts, and high requirements for the operating environment.

[0006] The needle selection device of Bonas' jacquard machine has the following structure: two cylindrical iron core coils, combined with magnetic plates at both ends, form an electromagnet with a narrow, inclined track-shaped magnetic pole pair. The plate hook replaces the functions of the vertical hook, armature hook, shaft, and spring. When the coil is energized, the magnetic pole pair of the electromagnet attracts the plate hook, which then bends and hangs on the track-shaped magnetic pole pair; this is the hanging state. When the coil is not energized, the plate hook remains upright; this is the detached state. Its advantages are simple structure, low cost, and good adaptability to jacquard environments. Its disadvantages are that the hook tip / depth is too small, making it prone to wear and resulting in a short service life, high coil power consumption, and large mechanism size.

[0007] Bonas's hook design is distinctive, but it places high demands on the materials. It needs to be made of soft iron, and possess good elasticity, rigidity, and wear resistance. Typically, soft iron materials with good magnetic permeability have poor elasticity, rigidity, and wear resistance, while materials that meet the requirements of elasticity, rigidity, and wear resistance have poor magnetic permeability. This is the root cause of the current shortcomings in Bonas's design. Summary of the Invention

[0008] To overcome the shortcomings of the existing technology, the present invention provides a needle selection device with an elastic armature hook, its components, and an electronic jacquard machine.

[0009] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution:

[0010] A needle selection device with elastic armature hooks includes a substrate and a set of elastic armature hooks, an electromagnet, vertical hooks, and a pulley system disposed on the substrate. The electromagnet is fixedly installed at the top center of the front side of the substrate and is made of an I-beam core and a coil. There are two elastic armature hooks, which are deformably disposed on the left and right sides of the electromagnet via elastic armature hook mounting blocks located on the substrate. There are two vertical hooks, which are slidably installed in linear vertical hook guide rails on both sides of the substrate. The vertical hooks are vertical hooks with protruding edges, and the two vertical hooks are located outside the two elastic armature hooks. The pulley system is slidably disposed in a pulley system groove in the middle of the substrate. The pulley system is connected to the bottom ends of the two vertical hooks via an upper pulley line and to a first wire connector located below the substrate via a lower pulley line.

[0011] The elastic armature hook can bend and deform towards the I-beam core under the pushing action of the convex edge of the vertical hook, so that the elastic armature hook can simultaneously contact the long and short magnetic poles of the I-beam core when the coil is energized to form a closed magnetic circuit; the elastic armature hook can also be elastically straightened away from the I-beam core when the pushing action of the convex edge of the vertical hook is removed, so that the elastic armature hook disengages from the short magnetic pole of the I-beam core when the coil is not energized, so as to hook the vertical hook on the corresponding side; the vertical hook realizes the hanging and unhooking state of the jacquard device through the cooperation of the elastic armature hook.

[0012] Furthermore, the elastic armature hook is a whole formed by a magnetic rod part, an elastic rod part and a hook tip part firmly combined;

[0013] The main body of the elastic rod is an elastically deformable component; the magnetic rod is fixedly attached to the inner surface of the main body of the elastic rod, and can deform and recover together with the main body of the elastic rod, and is used to cooperate with the long and short magnetic poles of the I-shaped iron core to form a closed magnetic circuit; the hook tip is fixedly installed on the outer side of the bottom end of the main body of the elastic rod, and the shape of the hook tip matches the shape of the vertical hook, and is used to cooperate with the vertical hook to realize the hanging and unhooking state of the jacquard device;

[0014] The top of the main body of the elastic rod extends into a mounting structure for fixed connection with the elastic armature hook mounting block. With the cooperation of the mounting structure and the elastic armature hook mounting block, the upper end of the inner side of the magnetic rod is always in close contact with the long magnetic pole of the I-shaped iron core.

[0015] When the convex edge of the vertical hook does not exert a pushing effect on the hook tip, the main body of the elastic rod remains in a vertical natural state, and there is a magnetic gap between the lower end of the inner side of the magnetic rod and the short magnetic pole of the I-shaped iron core. At this time, the hook tip is connected to the vertical hook.

[0016] When the convex edge of the vertical hook pushes against the hook tip, the main body of the elastic rod undergoes elastic bending deformation toward the I-shaped iron core, and the lower end of the inner side of the magnetic rod approaches the short magnetic pole of the I-shaped iron core so that the I-shaped iron core attracts it to the closed magnetic circuit position.

[0017] Furthermore, the elastic rod is made of an elastic material, which may be a metallic or non-metallic material including copper sheets, steel sheets, and nylon sheets.

[0018] The magnetic rod is made of a soft magnetic material, which is a soft magnetic sheet with soft magnetic properties. It is bonded to the elastic rod by adhesive bonding or thermal bonding process and can bend and deform with the elastic rod.

[0019] The hook tip is made of a wear-resistant material, which can be metallic or non-metallic, and the vertical hook and the hook tip are made of the same wear-resistant material.

[0020] Furthermore, an end reinforcement structure extends from the bottom of the main body of the elastic rod for fixed connection with the hook tip. The end reinforcement structure is an upwardly inclined F-shaped structure. The hook tip is fixedly installed on the outer side of the bottom end of the elastic rod through the good fit of the end reinforcement structure.

[0021] Furthermore, the elastic armature hook mounting block is provided with two elastic armature hook fixing grooves. The two elastic armature hooks are respectively embedded into the corresponding elastic armature hook fixing grooves through their respective mounting and fixing structures to achieve positioning and fixing with the substrate. When the jacquard device is in the hanging state, the pulling force of the vertical hook is transmitted to the substrate through the elastic armature hook, and finally to the jacquard device frame that fixes the substrate.

[0022] Furthermore, depending on the different positions of the elastic armature hook mounting block on the substrate, the mounting and fixing structure has the following two forms;

[0023] When the elastic armature hook mounting block is located outside the linear vertical hook guide rail, the mounting and fixing structure has a downwardly curved U-shaped structure.

[0024] When the elastic armature hook mounting block is located inside the linear vertical hook guide rail, the mounting and fixing structure has an upwardly inclined L-shaped structure.

[0025] Furthermore, the vertical hook includes a rod-shaped body. A side ear for engaging with the blade edge is provided at 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 base 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, and the protruding edge laterally protrudes beyond the hook tip of the top hook. The contour curve of the protruding edge is divided into a pushing section in the upper part and a holding section in the lower part. The pushing section is an inclined curve starting from the hook base of the top hook, which can laterally push the elastic armature hook in contact with it during the initial vertical upward movement of the vertical hook. The holding section is a straight line parallel to the direction of movement of the rod-shaped body. The retaining section and the pushing section are smoothly connected. The retaining section can apply a retaining force to the elastic armature hook that contacts it during the middle and later stages of the vertical upward movement of the vertical hook to maintain lateral pushing. The distance from the bottom of the retaining 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 retaining 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 with the linear vertical hook guide rail and ensuring that the vertical hook does not have lateral displacement. The top end of the limiting convex edge is connected in a straight line parallel to the bottom end of the retaining section of the convex edge to realize the full linear displacement of the vertical hook. At least one damping groove is opened between the side ear and the rod-shaped body to block the knife lifting vibration.

[0026] Furthermore, the pulley block can be a conventional pulley block found in existing needle selection devices, or a thin pulley block can be selected.

[0027] A needle selection device assembly is formed by sequentially stacking and assembling several needle selection devices with elastic armature hooks as described above.

[0028] A high-density needle selection device is constructed by adding a sealing plate and another set of the aforementioned needle selection device with elastic armature hooks, an electromagnet, a vertical hook, and a pulley assembly to the existing needle selection device. One set of the elastic armature hooks, electromagnet, vertical hook, and pulley assembly is located on the front side of the substrate, while the other set is located on the back side. The sealing plate covers either the front or back side of the substrate. The electromagnet on the front side and the electromagnet on the back side are stacked vertically, as are the elastic armature hooks on the front and back sides. The vertical hook on the front side is longer than the vertical hook on the back side; that is, the vertical hook on the front side is a long hook, and the vertical hook on the back side is a short hook.

[0029] It should be noted that the pulley assembly required for the high-density needle selection device can also be configured in two ways. One is a parallel thin pulley block configuration, where the thickness of the pulley block is reduced to 2-2.4 mm, and the two parallel blocks have the same thickness as the original pulley block. The other configuration is a double-layered pulley block structure stacked vertically, which can also be adapted to high-density electromagnets and corresponding vertical hook structures. Since this is not the focus of the innovation of this invention, it will not be elaborated here.

[0030] A high-density needle selection device assembly is formed by stacking and assembling several of the above-mentioned high-density needle selection devices in sequence, such as a 16-needle high-density needle selection device assembly formed by stacking and assembling eight of the above-mentioned high-density needle selection devices in sequence.

[0031] It should be noted that the technical solution of the present invention is not limited to the manufacture of a 16-needle high-density needle selection device assembly, but can also be used to manufacture a needle selection device assembly with even higher density.

[0032] An electronic jacquard machine is equipped with the above-described needle selection device assembly or the above-described high-density needle selection device assembly.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] This invention improves the armature hook by using a composite of elastic, soft magnetic, and wear-resistant materials to create an elastic armature hook. This not only has good elasticity, rigidity, and wear resistance, but also excellent magnetic conductivity. It meets the high-performance requirements of various jacquard machines for armature hook materials, while also achieving the beneficial effects of simple structure, low coil power consumption, good product consistency, high long-term operational reliability, and reduced manufacturing costs.

[0035] This invention optimizes and improves hook release technology by employing a fully linear vertical hook guide rail and a vertical hook protrusion design to create a new hook release technology. This technology allows for the design of larger hooks without concerns about difficulty in releasing them, and the ample design margin ensures operational reliability under complex working conditions. The cooperation between the fully linear vertical hook guide rail and the vertical hook protrusion ensures the accuracy of the lateral displacement of the elastic armature hook by the protrusion during the vertical displacement of the vertical hook, enabling a dynamic magnetic gap range of 0-0.3mm. Furthermore, the distance from the holding section of the vertical hook protrusion to the hook bottom is greater than the distance from the hook tip to the hook bottom. This distance difference is also the distance from the armature hook tip to the vertical hook tip, thus providing a release margin, which is a tolerance margin that prevents malfunctions and improves reliability. The holding section of the protrusion allows the knife to reach the vertical hook switching height (from hooking to releasing) required by the needle selection device within a wide range, providing a wide range of knife lifting height tolerance (tolerance margin), reducing the manufacturing difficulty of the jacquard machine main unit and improving the overall machine's operational reliability.

[0036] This invention optimizes and improves the magnetic circuit structure. The elastic armature hook of this invention has a reduced volume and weight, a simplified structure, and fewer assembly parts, resulting in a compact overall structure for the needle selection device. The armature hook contacts the side of the I-beam core beam, and under the action of electromagnetic force, the armature hook and the magnetic poles of the I-beam core can automatically align. The electromagnet coil of this invention has low power consumption, reducing the load on the drive circuit, resulting in low energy consumption. Furthermore, the coil temperature is low, reducing mechanical deformation of the components of the needle selection device caused by temperature rise. Simultaneously, it improves the tolerance margin to power supply voltage and ambient temperature, enhancing the reliability of operation and control.

[0037] The high-density needle selection device of this invention features a compact overall structure, a rationally designed magnetic circuit, low electromagnet power consumption, and reliable operation. Furthermore, it employs two independent vertical hooks to enhance the needle lifting density of the two-position needle selection device, enabling the integration of two sets of needle selection devices for dual-position compound jacquard machines into a single unit. Using this high-density needle selection device, a 16-needle selection device assembly can be implemented, corresponding to a 4×3.5cm... 2 The needle density is as high as 11,428 needles per square meter, which is twice that of commonly used needle selection device components on the market. Therefore, the high-density needle selection device of this invention is expected to be used to manufacture electronic jacquard machines with 20,000 needles or even more needles per machine.

[0038] 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 below with reference to the accompanying drawings. Attached Figure Description

[0039] 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:

[0040] Figure 1 This is a working principle diagram of the present invention and a front structural schematic diagram of the needle selection device with an elastic armature hook in Embodiment 1 (the pulley group is omitted in the figure);

[0041] Figure 2 This is a perspective view of the elastic armature hook in Embodiment 1 of the present invention;

[0042] Figure 3 This is an exploded view of the elastic armature hook in Embodiment 1 of the present invention;

[0043] Figure 4 This is a schematic diagram of the vertical hook structure in Embodiment 1 of the present invention;

[0044] Figure 5This is an exploded view of the high-density needle selection device in Embodiment 3 of the present invention (the pulley group is omitted in the figure);

[0045] Figure 6 This is a schematic diagram of the back structure of the high-density needle selection device in Embodiment 3 of the present invention (the pulley group is omitted in the figure);

[0046] Figure 7 This is a perspective view of the high-density needle selection device assembly in Embodiment 4 of the present invention (the pulley group is omitted in the figure). Detailed Implementation

[0047] 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.

[0048] Example 1

[0049] See Figure 1 As shown, the present invention provides a needle selection device with an elastic armature hook, including a substrate 1 and a set of elastic armature hooks 2, electromagnets 3, vertical hooks 4 and pulley blocks (not shown in the figure) disposed on the substrate 1.

[0050] The electromagnet 3 is fixedly installed at the top center of the front side of the substrate 1. The electromagnet 3 is made of an I-shaped iron core and a coil, with the long magnetic pole of the I-shaped iron core on top and the short magnetic pole on the bottom.

[0051] Each set of the elastic armature hooks 2 has two, which are deformably mounted on the left and right sides of the electromagnet 3 via elastic armature hook mounting blocks 5 located on the substrate 1. See also Figures 2-3 As shown, the elastic armature hook 2 is a single unit firmly formed by the magnetic guide rod portion 201, the elastic rod portion 202, and the hook tip portion 203. Wherein,

[0052] The elastic rod 202 is made of an elastic material, which can be a metallic or non-metallic material such as copper sheet, steel sheet, or nylon sheet. The elastic rod 202 is mainly integrally formed from a main body, a mounting and fixing structure 204, and an end reinforcing structure 205. The main body of the elastic rod 202 is an elastically deformable component. The mounting and fixing structure 204 has a downwardly curved U-shape, extending from the top of the main body of the elastic rod 202. The end reinforcing structure 205 has an upwardly inclined F-shape, extending from the bottom of the main body of the elastic rod 202.

[0053] The magnetic rod 201 is made of soft magnetic material. The soft magnetic material can be a soft magnetic sheet with soft magnetic properties. It is fixedly attached to the inner surface of the main body of the elastic rod 202 by adhesive bonding or thermal bonding process. It can bend, deform and recover together with the main body of the elastic rod 202, and is used to cooperate with the long and short magnetic poles of the I-shaped iron core to form a closed magnetic circuit.

[0054] The hook tip 203 is made of a wear-resistant material, which can be either metallic or non-metallic. The vertical hook 4 and the hook tip 203 are made of the same wear-resistant material. The hook tip 203 is fixedly installed on the outer side of the bottom of the main body of the elastic rod 202 through a good fit with the end reinforcement structure 205. The shape of the hook tip 203 matches the shape of the vertical hook 4, and it is used to cooperate with the vertical hook 4 to achieve the hanging and detaching states of the jacquard device.

[0055] See Figure 1 As shown, the elastic armature hook mounting block 5 is located on the top of the substrate 1, and an elastic armature hook fixing groove 7 is provided at each of the left and right ends of the elastic armature hook mounting block 5. During assembly, the two elastic armature hooks 2 are respectively embedded into the corresponding elastic armature hook fixing grooves 7 through their respective U-shaped mounting and fixing structures 204, thereby achieving positioning and fixing with the substrate 1. At the same time, with the cooperation of the mounting and fixing structure 204 and the elastic armature hook mounting block 5, the upper end of the inner side of the magnetic rod part 201 is always in close contact with the long magnetic pole of the I-shaped iron core.

[0056] The elastic armature hook of the present invention is made of a composite of multiple materials. Equipped with a needle selection device for this elastic armature hook, it not only meets the high performance requirements of various materials, but also achieves the beneficial effects of simple structure, low coil power consumption, good product consistency, high long-term operational reliability, and reduced manufacturing cost.

[0057] Each set of vertical hooks 4 consists of two hooks, which are slidably mounted on the linear vertical hook guides 6 on both sides of the substrate 1. The vertical hooks 4 are hooks with protruding edges, and the two hooks 4 are located outside the two elastic armature hooks 2. See also... Figure 4As shown, the vertical hook 4 includes a rod-shaped body 401. A side ear 402 for engaging with the blade edge of a lifting knife is provided at the middle of the outer side of the rod-shaped body 401. During operation, the side ear 402 directly engages with the blade edge of the lifting knife. Lifting the knife pulls the vertical hook 4 through the side ear 402. A top hook 403 is provided at the top of the inner side of the rod-shaped body 401, with the hook tip of the top hook 403 close to the inner edge of the rod-shaped body 401 and the hook base close to the axis of the rod-shaped body 401. A protruding edge is provided at the upper edge of the inner side of the rod-shaped body 401, below the top hook 403, and the protruding edge laterally protrudes from the hook tip of the top hook 403. The contour curve of the convex edge is divided into a pushing section 404a in the upper section and a holding section 404b in the lower section. The pushing section 404a is an inclined curve starting from the bottom of the top hook 403, and the holding section 404b is a straight line parallel to the moving direction of the rod-shaped body 401. The holding section 404b and the pushing section 404a are smoothly connected. In the initial stage of the upward movement of the vertical hook 4, the pushing section 404a can generate a lateral pushing force on the elastic armature hook 2 in contact with it. In the middle and later stages of the vertical upward movement of the vertical hook 4, the holding section 404b can apply a holding force to the elastic armature hook 2 in contact with it to maintain the lateral pushing.

[0058] The pulley system is slidably disposed within a pulley groove in the middle of the substrate 1. The pulley system can be a conventional pulley system found in existing needle selection devices, or a thin pulley system can be selected. The pulley system is connected to the bottom ends of the two vertical hooks 4 via an upper pulley line, and is connected to the first thread connector located below the substrate 1 via a lower pulley line. The two vertical hooks 4 drive the pulley system to slide up and down via the upper pulley line.

[0059] The working principle of this invention is as follows:

[0060] See Figure 1 As shown, Figure 1The left side shows the jacquard device in its disassembled state. When the vertical hook 4 moves upward within the linear vertical hook guide 6, the convex edge of the vertical hook 4 applies a stable lateral thrust toward the H-beam core to the hook tip 203 of the elastic armature hook 2. This causes the elastic rod 202 of the elastic armature hook 2 to undergo elastic bending deformation toward the H-beam core under the pushing action of the convex edge of the vertical hook 4. Consequently, the lower end of the magnetic guide rod 201 of the elastic armature hook 2 moves laterally from the static / dynamic magnetic gap position to near the H-beam core. When the coil of the electromagnet 3 is energized at the dynamic magnetic gap position of the short magnetic pole of the core, the attraction force of the electromagnet 3 is greater than the elastic force generated by the bending deformation of the elastic rod 202. The electromagnet 3 attracts the lower end of the magnetic rod 201 from the dynamic magnetic gap position to the closed magnetic circuit position and remains in the state of attraction with the short magnetic pole of the I-shaped iron core. At this time, the hook tip 203 does not contact the top hook 403 of the vertical hook 4, which is the disengaged state of the jacquard device.

[0061] See Figure 1 As shown, Figure 1 The right side shows the hanging state of the jacquard device. If the coil of the electromagnet 3 is not energized, the I-shaped iron core has no electromagnetic force, causing the short magnetic pole of the I-shaped iron core to lose its attraction to the lower end of the magnetic rod 201. Therefore, under the action of its own elastic force and the obstruction of the protruding edge of the vertical hook 4, the elastic rod 202 of the elastic armature hook 2 first bounces outward a portion, so that the lower end of the magnetic rod 201 is separated from the short magnetic pole of the I-shaped iron core and returns from the closed magnetic circuit position to the dynamic magnetic gap position. When the vertical hook 4 descends within the linear vertical hook guide rail 6, since the protruding edge of the vertical hook 4 does not contact the hook tip 203 of the elastic armature hook 2, it no longer pushes against the hook tip 203 of the elastic armature hook 2. Therefore, the elastic rod 202 restores its shape under its own residual elasticity, and the lower end of the magnetic rod 201 further resets from the dynamic magnetic gap position to the static magnetic gap position and remains in a straight state. At this time, the hook tip 203 can hook the hook of the vertical hook 4, which is the hanging state of the jacquard device. In the hanging state of the jacquard device, the pulling force of the vertical hook 4 is transmitted to the substrate 1 through the elastic armature hook 2, and finally to the jacquard device frame that fixes the substrate 1.

[0062] Preferably, the distance from the bottom of the retaining section 404b to the bottom of the top hook 403 is greater than the distance from the tip of the top hook 403 to the bottom of the top hook 403. This distance difference is also the distance between the tip 203 of the elastic armature hook 2 and the top hook 403 of the vertical hook 4 in the unhooked state, so it is defined as the unhooking allowance, which is a tolerance margin. Figure 4D represents the unhooking allowance. Due to the existence of the unhooking allowance D, the hook tip 203 of the elastic armature hook 2 does not contact the top hook 403 of the vertical hook 4. Even if vibration or other situations occur, the top hook 403 of the vertical hook 4 will not catch the hook tip 203 of the elastic armature hook 2, thus avoiding the failure to unhook. The unhooking allowance ensures the reliability of the unhooking action under complex working conditions.

[0063] Preferably, the length of the retaining section 404b of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs. Within this tolerance range, the elastic armature hook 2 in contact with the convex edge remains in the dynamic magnetic gap position. The retaining section 404b is actually a straight section, and the elastic armature hook 2 in contact with it will not have lateral displacement within this section of the retaining section 404b, but will remain in the dynamic magnetic gap position. The dynamic magnetic gap is the distance between the magnetic rod portion 201 of the elastic armature hook 2 and the short magnetic pole of the I-beam core under the action of the convex edge, and the value range of the dynamic magnetic gap is 0 to 0.3 mm.

[0064] Limiting the dynamic magnetic gap to a relatively small range, such as 0–0.3 mm, is crucial to this invention and also a matter of tolerance margin. With a small magnetic gap, the electromagnet coil can generate sufficient attraction with relatively low power consumption to engage the armature hook with the magnetic pole and maintain this state. Limiting the dynamic magnetic gap to 0.4 mm is not impossible, but simple calculations show that the electromagnet would require approximately 80% more electromagnetic force, which is clearly disadvantageous for low-power designs. Setting the dynamic magnetic gap to 0.2 mm would certainly result in lower power consumption, but this value also has the function of compensating for machining errors, assembly errors, and deformation errors during operation. Therefore, setting the dynamic magnetic gap to 0.2 mm implies higher precision requirements for components, thus increasing costs.

[0065] The lower end of the magnetic rod of the elastic 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 lateral displacement after the vertical hook protrusion pushes the elastic armature hook to bend and deform when the vertical hook moves upward (a large stroke displacement is achieved by external force); 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 (a small stroke displacement is achieved by internal force).

[0066] In the actual operation of a jacquard machine, errors exist in the position of the blade edges of multiple lifting knives due to transmission mechanisms and mechanical forces. The sheet-like lifting knives can be up to 2 meters long (even longer in high-needle-count jacquard machines). During operation, the lifting knives can deform, leading to positional errors at different points on the same piece of lifting knife. Different jacquard fabric patterns result in uneven force distribution at different positions on the same piece of lifting knife, and even different forces on both sides of the blade and at both ends of the lifting knife can generate torsional torque, potentially causing permanent deformation of the lifting knife in severe cases. Therefore, the concept of "lifting knife tolerance" arises, referring to the range of height difference between the lifting knife edges that the needle selection device can tolerate. Clearly, a needle selection device with a larger "lifting knife tolerance" is beneficial for the overall operation of the jacquard machine. This invention incorporates a retaining section with a raised edge, ensuring that the elastic armature hook remains within a small dynamic magnetic gap over a relatively wide range. When the electromagnet coil is energized, the elastic armature hook can be smoothly attracted to the closed magnetic circuit position, thereby achieving the transition from "hooked" to "released" state of the vertical hook and widening the "lifting knife tolerance." This is an important tolerance margin, which reduces the precision requirements of the needle selection device on the jacquard machine's knife lifting position and improves the reliability of the jacquard machine's overall operation switching.

[0067] Preferably, the inner middle and lower parts of the rod-shaped body 401 are provided with a limiting protrusion 405 along its edge for engaging with the linear vertical hook guide rail 6 and ensuring that the vertical hook 4 does not undergo lateral displacement. The top end of the limiting protrusion 405 is parallel to the bottom end of the protrusion retaining section 404b, thus achieving full-range linear displacement of the vertical hook 4. Since the vertical hook 4 is disposed within the linear vertical hook guide rail 6 of the substrate 1, the vertical hook 4 requires a matching rod-shaped body 401 to ensure that the vertical hook 4 does not undergo lateral displacement when moving up and down within the linear vertical hook guide rail 6. Because the dynamic magnetic gap is generated by the protrusion and has certain precision requirements, to ensure precision, the movement trajectory of the vertical hook 4 must be stable, ensuring that there is no other lateral displacement while the vertical hook 4 is moving up and down; otherwise, the size of the dynamic magnetic gap cannot be controlled.

[0068] Preferably, at least one damping groove 406 is provided between the side ear portion 402 and the rod-shaped body 401 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 403 through the side ear portion 402 and improve the reliability of the operation.

[0069] Example 2

[0070] This invention provides a needle selection device assembly, which is formed by sequentially stacking and assembling several needle selection devices with elastic armature hooks disclosed in Embodiment 1. For example, 16 needle selection devices with elastic armature hooks disclosed in Embodiment 1 can be sequentially stacked and assembled to form a 16-needle selection device assembly.

[0071] Example 3

[0072] See Figure 5 and Figure 6 As shown, based on the structure of the needle selection device with elastic armature hooks provided in Embodiment 1, the present invention also provides a high-density needle selection device. This high-density needle selection device includes a substrate 1, a sealing plate 8, and a set of elastic armature hooks 2, electromagnets 3, vertical hooks 4, and pulleys (not shown) disposed on the front side of the substrate 1, and another set of elastic armature hooks 2, electromagnets 3, vertical hooks 4, and pulleys (not shown) disposed on the back side of the substrate 1.

[0073] The structure and installation method of the set of elastic armature hook 2, electromagnet 3, vertical hook 4 and pulley block located on the front are the same as those in Embodiment 1.

[0074] The structure of the electromagnet 3 located on the back is the same as that of the electromagnet 3 located on the front. The difference is that the electromagnet 3 located on the back is below the electromagnet 3 located on the front, thus forming an overlapping relationship.

[0075] The structure of the elastic armature hook 2 located on the back is slightly different from that of the elastic armature hook 2 located on the front. The difference lies in the fact that, since the electromagnet 3 on the back is below, to avoid interfering with the movement of the vertical hook 4 on the front, the elastic armature hook mounting block 5 on the back needs to be designed in the middle of the substrate 1. Therefore, the mounting and fixing structure 204 of the elastic armature hook 2 on the back has an upwardly inclined L-shaped structure, and the shape of the elastic armature hook fixing groove 7 on the elastic armature hook mounting block 5 on the back matches the shape of the L-shaped mounting and fixing structure 204 of the elastic armature hook 2 on the back. The installation method of the elastic armature hook 2 on the back also differs from that on the front. The difference lies in the fact that, since the electromagnet 3 on the back is below and the electromagnet 3 on the front is above, the elastic armature hook 2 on the back is below the elastic armature hook 2 on the front, thus forming a stacked relationship. Therefore, the elastic armature hook 2 located on the front is called the upper elastic armature hook 2-1, and the elastic armature hook 2 located on the back is called the upper elastic armature hook 2-2.

[0076] The structure of the vertical hook 4 on the back is slightly different from that of the vertical hook 4 on the front. The difference is that since the electromagnet 3 on the back is below and the electromagnet 3 on the front is above, in order to achieve the same hook position at the front and back, the vertical hook 4 on the front needs to have a longer protruding edge than the vertical hook 4 on the back. Therefore, the vertical hook 4 on the front is a long vertical hook 4-1 with a longer rod-shaped body 401, and the vertical hook 4 on the back is a short vertical hook 4-2 with a shorter rod-shaped body 401.

[0077] The structure and installation method of the vertical hook 4 located on the back are the same as those of the vertical hook 4 located on the front.

[0078] The sealing plate 8 can be applied to the front or back of the substrate 1.

[0079] Through the above improvements, two pairs of vertical hooks 4 can be set in the space of a substrate 1, thereby increasing the density of the needle selection device.

[0080] It should be noted that the pulley assembly required for the high-density needle selection device in this embodiment can also be configured in two ways. One is a parallel thin pulley group configuration, where the thickness of the pulley group is reduced to 2-2.4 mm, and the two parallel groups have the same thickness as the original pulley group. The other configuration is a double-layer pulley group structure stacked vertically, which can also be adapted to high-density electromagnets and corresponding vertical hook structures. Since this is not the focus of innovation in this invention, it will not be elaborated upon here.

[0081] Example 4

[0082] See Figure 7 As shown, the present invention provides a high-density needle selection device assembly, which is formed by sequentially stacking and assembling several high-density needle selection devices disclosed in Embodiment 3. For example, eight high-density needle selection devices disclosed in Embodiment 3 can be sequentially stacked and assembled to form a 16-needle high-density needle selection device assembly.

[0083] It should be noted that the technical solution of the present invention is not limited to the manufacture of a 16-needle high-density needle selection device assembly, but can also be used to manufacture a needle selection device assembly with even higher density.

[0084] Example 5

[0085] The present invention also provides a high-density electronic jacquard machine, which is equipped with a needle selection device assembly disclosed in Embodiment 2, or with a high-density needle selection device assembly disclosed in Embodiment 4.

[0086] 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 needle selection device with an elastic armature hook, characterized in that: The system includes a substrate (1) and a set of elastic armature hooks (2), an electromagnet (3), a vertical hook (4), and a pulley system disposed on the substrate (1); the electromagnet (3) is fixedly installed at the top center of the front side of the substrate (1), and the electromagnet (3) is made of an I-beam core and a coil; there are two elastic armature hooks (2), which are deformably disposed on the left and right sides of the electromagnet (3) respectively by elastic armature hook mounting blocks (5) located on the substrate (1); the vertical hook (4) There are two vertical hook guide rails (6) on both sides of the substrate (1), which can be slidably installed up and down. The vertical hook (4) is a vertical hook with a raised edge, and the two vertical hooks (4) are located outside the two elastic armature hooks (2). The pulley group is slidably installed in the pulley group groove in the middle of the substrate (1). The pulley group is connected to the bottom end of the two vertical hooks (4) through the upper pulley line, and the pulley group is connected to the first line connector located below the substrate (1) through the lower pulley line. The elastic armature hook (2) can bend and deform towards the I-shaped iron core under the pushing action of the protruding edge of the vertical hook (4), so that the elastic armature hook (2) can simultaneously contact the long and short magnetic poles of the I-shaped iron core when the coil is energized, so as to form a closed magnetic circuit; the elastic armature hook (2) can also be elastically straightened away from the I-shaped iron core when the pushing action of the protruding edge of the vertical hook (4) is removed, so that the elastic armature hook (2) can disengage from the short magnetic pole of the I-shaped iron core when the coil is not energized, so as to hook the vertical hook (4) on the corresponding side; the vertical hook (4) realizes the hanging state and the detached state of the jacquard device by cooperating with the elastic armature hook (2); The elastic armature hook (2) is a whole formed by the magnetic rod part (201), the elastic rod part (202) and the hook tip part (203) firmly combined; The main body of the elastic rod (202) is an elastically deformable component; the magnetic rod (201) is fixedly attached to the inner surface of the main body of the elastic rod (202), and can deform and recover together with the main body of the elastic rod (202), and is used to cooperate with the long and short magnetic poles of the I-shaped iron core to form a closed magnetic circuit; the hook tip (203) is fixedly installed on the outer side of the bottom end of the main body of the elastic rod (202), and the shape of the hook tip (203) matches the shape of the vertical hook (4), and is used to cooperate with the vertical hook (4) to realize the hanging state and the unhooking state of the jacquard device; The top of the main body of the elastic rod (202) extends into a mounting and fixing structure (204) for fixed connection with the elastic armature hook mounting block (5). With the cooperation of the mounting and fixing structure (204) and the elastic armature hook mounting block (5), the upper end of the inner side of the magnetic rod (201) is always in close contact with the long magnetic pole of the I-shaped iron core. When the protruding edge of the vertical hook (4) does not exert a pushing effect on the hook tip (203), the main body of the elastic rod (202) remains in a vertical natural state, and there is a magnetic gap between the lower end of the inner side of the magnetic rod (201) and the short magnetic pole of the I-shaped iron core. At this time, the hook tip (203) is connected to the vertical hook (4). When the protruding edge of the vertical hook (4) pushes against the hook tip (203), the main body of the elastic rod (202) undergoes elastic bending deformation toward the I-shaped iron core, and the lower end of the inner side of the magnetic rod (201) approaches the short magnetic pole of the I-shaped iron core so that the I-shaped iron core can attract it to the closed magnetic circuit position. The elastic armature hook mounting block (5) is provided with two elastic armature hook fixing grooves (7). The two elastic armature hooks (2) are respectively embedded in the corresponding elastic armature hook fixing grooves (7) through their respective mounting and fixing structures (204) to achieve positioning and fixing with the substrate (1). When the jacquard device is in the hanging state, the pulling force of the vertical hook (4) is transmitted to the substrate (1) through the elastic armature hook (2), and finally transmitted to the jacquard device frame that fixes the substrate (1).

2. The needle selection device with an elastic armature hook according to claim 1, characterized in that: The elastic rod (202) is made of an elastic material, which is a metallic material including copper sheets and steel sheets, or a non-metallic material including nylon sheets; The magnetic rod part (201) is made of soft magnetic material, which is a soft magnetic sheet with soft magnetic properties. It is combined with the elastic rod part (202) by adhesive bonding or thermal bonding process and can be bent and deformed with the elastic rod part (202). The hook tip (203) is made of wear-resistant material, which can be metal or non-metal, and the vertical hook (4) and the hook tip (203) are made of the same wear-resistant material.

3. The needle selection device with an elastic armature hook according to claim 1, characterized in that: The bottom of the main body of the elastic rod (202) extends an end reinforcement structure (205) for fixed connection with the hook tip (203). The end reinforcement structure (205) is an upwardly inclined F-shaped structure. The hook tip (203) is fixedly installed on the outer side of the bottom end of the elastic rod (202) through the good fit of the end reinforcement structure (205).

4. The needle selection device with an elastic armature hook according to claim 1, characterized in that: Depending on the different positions of the elastic armature hook mounting block (5) on the substrate (1), the mounting and fixing structure (204) has the following two forms; When the elastic armature hook mounting block (5) is located outside the linear vertical hook guide rail (6), the mounting and fixing structure (204) has a downwardly curved U-shaped structure. When the elastic armature hook mounting block (5) is located inside the linear vertical hook guide rail (6), the mounting and fixing structure (204) has an upwardly inclined L-shaped structure.

5. The needle selection device with an elastic armature hook according to claim 1, characterized in that: The vertical hook (4) includes a rod-shaped body (401), with a side ear (402) for hooking with the blade of a lifting knife at the middle of the outer side of the rod-shaped body (401), and a top hook (403) at the top of the inner side of the rod-shaped body (401), with the hook tip of the top hook (403) close to the inner edge of the rod-shaped body (401), and the hook bottom of the top hook (403) close to the axis of the rod-shaped body (401); A raised edge is provided on the upper edge inside the rod-shaped body (401) and below the top hook (403). The raised edge protrudes laterally from the hook tip of the top hook (403). The contour curve of the raised edge is divided into a pushing section (404a) in the upper section and a holding section (404b) in the lower section. The pushing section (404a) is an inclined curve starting from the bottom of the hook of the top hook (403). The pushing section (404a) can push the elastic armature hook (2) in contact with it laterally in the initial vertical upward movement of the vertical hook (4). The holding section (404b) is a section that is parallel to the hook tip of the top hook (403). The rod-shaped body (401) moves in a straight line parallel to the direction of movement. The retaining section (404b) and the pushing section (404a) are smoothly connected. The retaining section (404b) can apply a retaining force to the elastic armature hook (2) that is in contact with it during the middle and later stages of the vertical upward movement of the vertical hook (4). The distance from the bottom of the retaining section (404b) to the bottom of the top hook (403) is greater than the distance from the tip of the top hook (403) to the bottom of the top hook (403). The length of the retaining section (404b) 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 part of the inner side of the rod-shaped body (401) are provided with a limiting protrusion (405) for engaging with the linear vertical hook guide rail (6) and ensuring that the vertical hook (4) does not have lateral displacement. The top end of the limiting protrusion (405) is connected in a straight line parallel to the bottom end of the protrusion retaining section (404b) to realize the full linear displacement of the vertical hook (4). At least one damping groove (406) is provided between the side ear portion (402) and the rod-shaped body (401) to block the vibration of the lifting knife.

6. The needle selection device with an elastic armature hook according to claim 1, characterized in that: A high-density needle selection device is also constructed by a sealing plate (8), another set of the elastic armature hooks (2), the electromagnet (3), the vertical hook (4) and the pulley group; One set of the elastic armature hook (2), the electromagnet (3), the vertical hook (4) and the pulley group are arranged on the front side of the substrate (1), and another set of the elastic armature hook (2), the electromagnet (3), the vertical hook (4) and the pulley group are arranged on the back side of the substrate (1). The sealing plate (8) is covered on the front or back side of the substrate (1), and the electromagnet (3) on the front side and the electromagnet (3) on the back side are stacked vertically. The elastic armature hook (2) on the front side and the elastic armature hook (2) on the back side are also stacked vertically. The length of the vertical hook (4) on the front side is longer than the length of the vertical hook (4) on the back side. That is, the vertical hook (4) on the front side is a long vertical hook, and the vertical hook (4) on the back side is a short vertical hook.

7. A needle selection device assembly, characterized in that, It is composed of several needle selection devices with elastic armature hooks as described in any one of claims 1-6, which are stacked and assembled sequentially.

8. An electronic jacquard machine, characterized in that, The needle selection device is equipped with a resilient armature hook as described in any one of claims 1-6 or a needle selection device assembly as described in claim 7.

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