Needle selector structure

Abstract

The invention relates to a needle selector structure. Relates to the technical field of needle selectors. The needle selecting device specifically comprises a needle selecting seat, a plurality of magnetic rod assemblies fixedly installed on the needle selecting seat and a plurality of spring needles arranged above the magnetic rod assemblies, the magnetic rod assemblies are arranged on the needle selecting seat in a staggered mode, and the spring needles correspond to the magnetic rod assemblies one to one; the magnetic bar assembly comprises a first magnetic bar and a second magnetic bar which are arranged at intervals, the top end of the magnetized first magnetic bar is an N pole, and the top end of the magnetized second magnetic bar is an S pole. The top end of the first magnetic bar is N pole after being magnetized, the top end of the second magnetic bar is S pole after being magnetized, the top end of the first magnetic bar and the top end of the second magnetic bar are conducted through the spring needle, magnetic induction lines outside the first magnetic bar and the second magnetic bar are spread in the spring needle, and therefore magnetic field interference with surrounding magnetic bar assemblies can be reduced; and the energy loss of magnetic induction lines can be reduced, so that the needle selection accuracy is ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of needle selectors, and in particular to a needle selector structure. Background Art

[0002] Most of the sweaters people wear daily are made of yarns with different colors. During the production process, when one color of yarn is being knitted, the yarns of other colors need to stop knitting. Therefore, the yarns of different colors need to be selected and stopped constantly during the knitting process. At present, the market generally uses computer-controlled electromagnetic needle selection technology to control the knitting machine to select needles, thereby realizing the rearrangement of the sweater colors. Through the frequent operation of the needle selector, sweaters of various colors can be formed.

[0003] At present, the needle selectors of knitting machines mostly adopt electromagnetic needle selectors. Electromagnetic needle selectors are more and more widely used due to their simple structure and convenient use. Electromagnetic needle selectors are usually provided with a number of magnetic bar assemblies corresponding to the spring needles of the knitting machine. By magnetizing or demagnetizing the corresponding magnetic bar assemblies, the corresponding elastic needles are adsorbed or released, thereby achieving the purpose of needle selection.

[0004] In the prior art, for a single spring needle, the number of magnetic bars in the needle selector magnetic bar assembly used is also single, and it is a single magnetic pole. The magnetic flux loop is stray and the magnetic fields interfere with each other greatly. When the magnetic bar assembly attracts or releases the corresponding spring needle, it is easy to produce a large magnetic force on the surrounding magnetic bar assemblies and spring needles, which may lead to needle selection errors, and then cause weaving errors, affecting production efficiency. Summary of the invention

[0005] The object of the present invention is to provide a needle selector structure to address the deficiencies of the above-mentioned prior art, which can reduce the magnetic interference between magnetic bar assemblies, thereby ensuring the accuracy of needle selection and improving production efficiency.

[0006] The present invention proposes a needle selector structure, including a needle selector seat, a plurality of magnetic bar assemblies fixedly mounted on the needle selector seat, and a plurality of spring needles arranged above the plurality of magnetic bar assemblies, the plurality of magnetic bar assemblies being staggered on the needle selector seat, and the plurality of spring needles corresponding to the plurality of magnetic bar assemblies one by one; the magnetic bar assembly includes a first magnetic bar and a second magnetic bar arranged at intervals, a first coil arranged on the first magnetic bar, and a second coil arranged on the second magnetic bar, the first magnetic bar having an N pole at the top end after being magnetized, and the second magnetic bar having an S pole at the top end after being magnetized, the first coil and the second coil having opposite current flow directions, the first coil being energized demagnetizes the first magnetic bar, and the second coil being energized demagnetizes the second magnetic bar.

[0007] Furthermore, the needle selector structure also includes a rotating shaft arranged in parallel and at intervals with the needle selector seat, and the plurality of spring needles are arranged on the rotating shaft and are rotatably connected to the rotating shaft.

[0008] Furthermore, the spring needle includes a main body portion having one end rotatably connected to the rotating shaft, and a deformation portion arranged at the bottom of the main body portion, and a rotating hole is provided at one end of the main body portion away from the needle selection seat, and the rotating shaft passes through the multiple rotating holes of the main body portion so that the multiple main bodies are rotatably connected to the rotating shaft.

[0009] Furthermore, the plurality of magnetic bar assemblies are arranged in at least two rows on the needle selection seat, and the magnetic bar assemblies arranged in two adjacent rows are staggered.

[0010] Furthermore, the needle selection seat includes a first seat body and a second seat body which are assembled with each other, a first half cavity is provided in the first seat body, a second half cavity is provided in the second seat body, a plurality of the magnetic rod assemblies in the first row are provided in the first half cavity, a plurality of the magnetic rod assemblies in the second row are provided in the second half cavity, and the plurality of the magnetic rod assemblies in the first row and the plurality of the magnetic rod assemblies in the second row are staggered.

[0011] Furthermore, the rotating shaft is arranged on one side of the first seat body, the multiple spring needles include multiple long needles and multiple short needles, the multiple long needles and the multiple short needles are staggered on the rotating shaft, the multiple magnetic bar assemblies in the first row are used to adsorb or release the multiple short needles respectively, and the multiple magnetic bar assemblies in the second row are used to adsorb or release the multiple long needles respectively.

[0012] Furthermore, the bottom of the first half chamber and the second half chamber are each provided with a plurality of magnetic bar limiting grooves, and the top is each provided with a plurality of magnetic bar extension openings, the plurality of magnetic bar limiting grooves are used to respectively limit the bottoms of the plurality of magnetic bar assemblies, the plurality of magnetic bar extension openings are used to respectively allow the tops of the plurality of magnetic bar assemblies to extend, and the plurality of magnetic bar limiting grooves are used to respectively limit the bottoms of the plurality of magnetic bar assemblies.

[0013] Furthermore, the magnetic bar assembly also includes a magnetic bar base and a permanent magnet arranged in the magnetic bar base, the first magnetic bar and the second magnetic bar are spaced apart on the magnetic bar base, the permanent magnet is located between the first magnetic bar and the second magnetic bar, the bottom end of the first magnetic bar is in contact with the N pole of the permanent magnet, and the bottom end of the second magnetic bar is in contact with the S pole of the permanent magnet.

[0014] Furthermore, a wiring groove is provided on one side of the magnetic bar base, and the ends of the first coil and the second coil are both routed in the wiring groove.

[0015] Furthermore, the needle selection seat also includes a control board arranged at the bottom of the first seat body and the second seat body, and a shell for fixing the first seat body and the second seat body, the first seat body and the second seat body are fixedly connected to the top of the shell, the control board is arranged in the shell, and a wiring hole is provided at the bottom of the magnetic bar limiting groove, and the ends of the first coil and the second coil pass through the wiring hole and are fixed to the control board.

[0016] The needle selector structure proposed by the present invention has the following beneficial effects: (1) After the first magnetic bar of the magnetic bar assembly of the needle selector structure is magnetized, the top end is N-pole, and after the second magnetic bar is magnetized, the top end is S-pole. The top end of the first magnetic bar is connected to the top end of the second magnetic bar through the spring needle, so that the magnetic flux lines outside the first magnetic bar and the second magnetic bar propagate in the spring needle, thereby reducing the magnetic field interference with the surrounding magnetic bar assemblies and reducing the energy loss of the magnetic flux lines, thereby ensuring the accuracy of needle selection and improving production efficiency; (2) The multiple magnetic bar assemblies of the needle selector structure are staggered on the needle selector seat, which can reduce the distance between two adjacent magnetic bar assemblies, so that as many magnetic bar assemblies as possible can be arranged on the needle selector seat. When a corresponding number of spring needles are set according to the number of magnetic bar assemblies, the number of spring needles can be increased, thereby increasing the knitting range of the flat knitting machine and making the flat knitting machine more applicable. (3) The needle selector structure of the needle selector structure also includes a rotating shaft, which is arranged in parallel and spaced relation with the needle selector seat, and a plurality of spring needles are arranged side by side on the rotating shaft and are rotatably connected with the rotating shaft, so that when the magnetic bar assembly adsorbs the spring needle, the spring needle rotates around the rotating shaft and generates elastic deformation; when the magnetic bar assembly releases the spring needle, the spring needle restores its own deformation under the action of elastic force and rotates in the opposite direction around the rotating shaft, so that the spring needle returns to the initial position, and then the spring needle switches between the working position and the non-working position, so as to realize the needle selection of the needle selector; (4) The spring needle of the needle selector structure includes a main body and a deformation part. When the magnetic rod assembly adsorbs the spring needle, the main body rotates around the rotation axis, and the deformation part is compressed and deformed; when the magnetic rod assembly releases the spring needle, under the elastic force of the deformation part to restore its own deformation, the main body rotates in the opposite direction around the rotation axis and returns to the initial position, so that the main body of the spring needle switches between the working position and the non-working position, thereby realizing the needle selection of the needle selector; (5) The multiple magnetic bar assemblies of the needle selector structure are arranged in at least two rows on the needle selector seat, and the multiple magnetic bar assemblies arranged in two adjacent rows are arranged alternately in sequence, so that the multiple magnetic bar assemblies can adsorb the corresponding spring needles, or release the corresponding spring needles, and in the process of the multiple magnetic bar assemblies adsorbing or releasing the corresponding spring needles, the movement trajectories of all the spring needles do not overlap, thereby preventing the spring needles from interfering with each other, thereby ensuring the accuracy of needle selection and improving production efficiency; (6) The needle selector seat of the needle selector structure is composed of a first seat body and a second seat body. A first half cavity is arranged in the first seat body, and a second half cavity is arranged in the second seat body. A plurality of magnetic bar limiting grooves arranged at the bottom of the first half cavity are staggered with a plurality of magnetic bar limiting grooves arranged at the bottom of the second half cavity; a plurality of magnetic bar extension openings arranged at the top of the first half cavity are staggered with a plurality of magnetic bar extension openings arranged at the top of the second half cavity, so that a first row of magnetic bar assemblies arranged in the first half cavity are staggered with a second row of magnetic bar assemblies arranged in the second half cavity; (7) The multiple spring needles of the needle selector structure include multiple short needles and multiple long needles, and the multiple short needles and the multiple long needles are arranged alternately, so that the multiple magnetic bar assemblies in the first row can adsorb or release the multiple short needles respectively, and the multiple magnetic bar assemblies in the second row can adsorb or release the multiple long needles respectively, thereby ensuring that the multiple magnetic bar assemblies arranged on the needle selector seat can adsorb or release the corresponding spring needles, thereby realizing the needle selection of the needle selector; (8) The magnetic bar assembly of the needle selector structure also includes a magnetic bar base and a permanent magnet. The permanent magnet is arranged in the magnetic bar base. The first magnetic bar and the second magnetic bar are arranged at intervals on the magnetic bar base. The permanent magnet is arranged between the first magnetic bar and the second magnetic bar. The first magnetic bar, the permanent magnet and the second magnetic bar form an integral magnet. The first magnetic bar is the N pole of the magnet, and the second magnetic bar is the S pole of the magnet. The N pole and the S pole of the magnet are connected through the spring needle, so that the magnetic flux lines outside the magnet are transmitted in the spring needle, thereby reducing the magnetic field interference with the surrounding magnetic bars and reducing the energy loss of the magnetic flux lines, thereby ensuring the accuracy of needle selection and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In the accompanying drawings, like reference numerals are used to represent like elements.

[0018] Figure 1 A schematic structural diagram of a needle selector structure according to an embodiment of the present invention; Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle; Figure 3A schematic structural diagram of a spring needle of a needle selector structure according to an embodiment of the present invention; Figure 4 This is a structural schematic diagram of a needle selector structure in which a plurality of magnetic bar assemblies are arranged on a needle selector seat according to an embodiment of the present invention; Figure 5 An exploded view of an assembly of a plurality of magnetic bar assemblies of a needle selector structure according to an embodiment of the present invention arranged on a needle selector seat; Figure 6 It is a partial structural schematic diagram of a plurality of magnetic bar assemblies of a needle selector structure according to an embodiment of the present invention installed on a first base body or a second base body; Figure 7 A schematic structural diagram of a magnetic bar assembly of a needle selector structure according to an embodiment of the present invention; Figure 8 A cross-sectional schematic diagram of a magnetic bar assembly of a needle selector structure according to an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of a magnetic bar base of a needle selector structure according to an embodiment of the present invention.

[0019] In the figure: 1. needle selection seat; 11. first seat body; 111. magnetic bar limiting groove; 112. magnetic bar extension outlet; 113. wiring hole; 12. second seat body; 13. control board; 14. shell; 2. magnetic bar assembly; 21. first magnetic bar; 22. second magnetic bar; 23. first coil; 24. second coil; 25. magnetic bar base; 251. first fixed cavity; 252. second fixed cavity; 253. third fixed cavity; 254. wiring groove; 26. permanent magnet; 3. spring needle; 31. long needle; 311. main body; 312. deformation part; 313. rotating hole; 32. short needle; 4. rotating shaft. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 9A needle selector structure according to an embodiment of the present invention comprises a needle selector seat 1, a plurality of magnetic bar assemblies 2 fixedly mounted on the needle selector seat 1, and a plurality of spring needles 3 arranged above the plurality of magnetic bar assemblies 2, the plurality of magnetic bar assemblies 2 are staggeredly arranged on the needle selector seat 1, and the plurality of spring needles 3 correspond one to one with the plurality of magnetic bar assemblies 2; the magnetic bar assemblies 2 comprise a first magnetic bar 21 and a second magnetic bar 22 arranged at intervals, a first coil 23 arranged on the first magnetic bar 21, and a second coil 24 arranged on the second magnetic bar 22, the top end of the first magnetic bar 21 being magnetized is an N pole, and the top end of the second magnetic bar 22 being magnetized is an S pole, the current flow directions of the first coil 23 and the second coil 24 are opposite, the energized first coil 23 demagnetizes the first magnetic bar 21, and the energized second coil 24 demagnetizes the second magnetic bar 22.

[0022] In the present application, the needle selector structure includes a needle selector seat 1, a plurality of magnetic bar assemblies 2 and a plurality of spring needles 3, wherein the plurality of magnetic bar assemblies 2 are arranged on the needle selector seat 1, and the plurality of spring needles 3 are arranged above the plurality of magnetic bar assemblies 2. The number of spring needles 3 corresponds to the number of magnetic bar assemblies 2, that is, the plurality of spring needles 3 correspond to the plurality of magnetic bar assemblies 2 one by one, and the corresponding spring needles 3 are adsorbed or released by the corresponding magnetic bar assemblies 2, thereby realizing the needle selection of the needle selector structure.

[0023] In this embodiment, the needle selector structure of the present application is suitable for flat knitting machines such as glove machines, flat knitting machines, and collar knitting machines. That is, when the needle selector structure is used for flat knitting machines such as glove machines, flat knitting machines, and collar knitting machines, the corresponding spring needles 3 are adsorbed or released by the corresponding magnetic bar assemblies 2, so that needle selection of flat knitting machines such as glove machines, flat knitting machines, and collar knitting machines can be realized.

[0024] In the present application, multiple magnetic bar assemblies 2 are staggered on the needle selection seat 1, which can reduce the distance between two adjacent magnetic bar assemblies 2, so that as many magnetic bar assemblies 2 as possible can be arranged on the needle selection seat 1, thereby increasing the number of spring needles 3, increasing the weaving range of the flat knitting machine, and making the application range of the flat knitting machine wider.

[0025] In the present application, the magnetic bar assembly 2 includes a first magnetic bar 21 and a second magnetic bar 22, and the first magnetic bar 21 and the second magnetic bar 22 are arranged at intervals, wherein the top end of the first magnetic bar 21 is an N pole after being magnetized, and the top end of the second magnetic bar 22 is an S pole after being magnetized. For a single spring pin 3, the magnetic attraction generated by the first magnetic bar 21 and the second magnetic bar 22 can simultaneously adsorb the corresponding spring pin 3.

[0026] Since the direction of the magnetic flux lines of the magnet is from the N pole to the S pole outside the magnet and from the S pole to the N pole inside the magnet, and in the prior art, the needle selector magnetic bar assembly used for a single spring needle 3 has the same magnetic pole, the magnetic flux lines outside the magnetic bar are propagated from the N pole to the S pole in the air, and the magnetic flux lines propagated in the air have stray loops and large energy losses, which are easy to interfere with the magnetic fields of the surrounding magnetic bars, and reduce the adsorption force of the magnetic bar on the corresponding spring needle 3, which may lead to needle selection errors, knitting errors, and affect production efficiency.

[0027] In the present application, the top of the first magnetic bar 21 is N-pole after being magnetized, and the top of the second magnetic bar 22 is S-pole after being magnetized. When the first magnetic bar 21 and the second magnetic bar 22 simultaneously adsorb the corresponding spring needle 3, the spring needle 3 connects the top of the first magnetic bar 21 with the top of the second magnetic bar 22.

[0028] In this embodiment, the first magnetic bar 21, the second magnetic bar 22 and the spring needle 3 are all made of soft magnetic materials. Since air is a non-magnetic medium, its magnetic resistance is much greater than that of soft magnetic materials, and similar to electric current, the magnetic flux lines always take the path with the smallest magnetic resistance (maximum magnetic permeability), so outside the first magnetic bar 21 and the second magnetic bar 22, most of the magnetic flux lines propagate from the N pole to the S pole in the spring needle 3.

[0029] On the one hand, it can prevent the magnetic flux lines propagating outside the first magnetic bar 21 and the second magnetic bar 22 from being scattered, thereby reducing the magnetic field interference with the surrounding magnetic bar components 2; on the other hand, since the magnetic resistance of the spring needle 3 is much smaller than the magnetic resistance of the air, the energy loss of the magnetic flux lines propagating in the spring needle 3 is small, thereby enhancing the adsorption force of the first magnetic bar 21 and the second magnetic bar 22 on the corresponding spring needle 3, thereby ensuring the accuracy of needle selection and improving production efficiency.

[0030] In the present application, the magnetic bar assembly 2 further includes a first coil 23 and a second coil 24, wherein the first coil 23 is disposed on the first magnetic bar 21, and the second coil 24 is disposed on the second magnetic bar 22. As mentioned above, the first magnetic bar 21 and the second magnetic bar 22 are made of soft magnetic materials, so after the first magnetic bar 21 and the second magnetic bar 22 are magnetized, they can simultaneously generate magnetic attraction to the corresponding spring pins 3, causing the spring pins 3 to move and generate elastic deformation, thereby adsorbing the spring pins 3 on the tops of the first magnetic bar 21 and the second magnetic bar 22.

[0031] When the first coil 23 is energized, the magnetic field formed in the first coil 23 has a magnetic flux line direction opposite to the internal magnetic flux line direction of the first magnetic bar 21 after magnetization. Therefore, the magnetic field formed in the first coil 23 and the magnetic field of the first magnetic bar 21 after magnetization cancel each other out, thereby reducing the magnetic field strength of the first magnetic bar 21 and achieving demagnetization of the first magnetic bar 21.

[0032] When the second coil 24 is energized, the magnetic field formed in the second coil 24 has a magnetic flux line direction opposite to the internal magnetic flux line direction of the second magnetic bar 22 after magnetization. Therefore, the magnetic field formed in the second coil 24 and the magnetic field of the second magnetic bar 22 after magnetization cancel each other out, thereby reducing the magnetic field strength of the second magnetic bar 22 and achieving demagnetization of the second magnetic bar 22.

[0033] When the magnetic attraction of the first magnetic bar 21 and the second magnetic bar 22 on the spring pin 3 is less than the elastic force of the spring pin 3 to restore its own deformation, the first magnetic bar 21 and the second magnetic bar 22 release the adsorbed spring pin 3 to restore the spring pin 3 to its original shape. Therefore, in the present application, the first magnetic bar 21 and the second magnetic bar 22 adsorb or release the corresponding spring pin 3 to change the position of the corresponding spring pin 3, thereby realizing the needle selection of the needle selector structure.

[0034] In one embodiment, initially, the first magnetic bar 21 and the second magnetic bar 22 do not adsorb the corresponding spring needle 3, and the spring needle 3 is in a non-working position; when selecting needles, the first magnetic bar 21 and the second magnetic bar 22 adsorb the corresponding spring needle 3, so that the spring needle 3 moves from the non-working position to the working position to perform weaving operations; after the work is completed, the first coil 23 and the second coil 24 are energized, and the first magnetic bar 21 and the second magnetic bar 22 release the corresponding spring needle 3, so that the spring needle 3 returns to the non-working position and waits for the next weaving operation.

[0035] In another embodiment, initially, the first magnetic bar 21 and the second magnetic bar 22 adsorb the corresponding spring needle 3, and the spring needle 3 is in the non-working position; when selecting the needle, the first coil 23 and the second coil 24 are energized, and the first magnetic bar 21 and the second magnetic bar 22 loosen the corresponding spring needle 3, so that the spring needle 3 moves from the non-working position to the working position to perform the weaving operation; after the work is completed, the first coil 23 and the second coil 24 are de-energized, and the first magnetic bar 21 and the second magnetic bar 22 adsorb the corresponding spring needle 3, so that the spring needle 3 returns to the non-working position and waits for the next weaving operation.

[0036] In this embodiment, the needle selector structure further includes a rotating shaft 4, which is arranged parallel to and spaced from the needle selector seat 1. A plurality of spring needles 3 are arranged side by side on the rotating shaft 4, so that the positions of the plurality of spring needles 3 are fixed by the rotating shaft 4. As described above, when the magnetic bar assembly 2 adsorbs or releases the spring needle 3, the spring needle 3 is displaced, so that the spring needle 3 is switched between the working position and the non-working position.

[0037] Therefore, in the present application, a plurality of spring needles 3 are arranged side by side on the rotating shaft 4 and are rotatably connected to the rotating shaft 4, so that when the magnetic bar assembly 2 adsorbs the spring needle 3, the spring needle 3 rotates around the rotating shaft 4 and produces elastic deformation; when the magnetic bar assembly 2 releases the spring needle 3, the spring needle 3 rotates in the opposite direction around the rotating shaft 4 under the action of the elastic force to restore its own deformation, so that the spring needle 3 returns to the initial position, and then the spring needle 3 is switched between the working position and the non-working position, thereby realizing the needle selection of the needle selector structure.

[0038] Specifically, in this embodiment, the spring needle 3 includes a main body 311 and a deformation portion 312. A rotating hole 313 is provided at one end of the main body 311 away from the needle selection seat 1. The rotating shaft 4 simultaneously penetrates the rotating holes 313 of multiple main bodies 311, so that the main bodies 311 of multiple spring needles 3 are rotatably connected to the rotating shaft 4 at the same time.

[0039] The deformation part 312 is arranged at the bottom of the main body 311. When the magnetic attraction force generated by the magnetic bar assembly 2 adsorbs the end of the main body 311 close to the needle selection seat 1, the main body 311 rotates around the rotating axis 4, and the deformation part 312 is compressed and deformed; when the magnetic attraction force generated by the magnetic bar assembly 2 decreases or disappears, the magnetic bar assembly 2 loosens the end of the main body 311 close to the needle selection seat 1, and under the elastic force of the deformation part 312 to restore its own deformation, the main body 311 rotates in the opposite direction around the rotating axis 4 and returns to the initial position, so that the main body 311 of the spring needle 3 is switched between the working position and the non-working position, thereby realizing the needle selection of the needle selector structure.

[0040] In this embodiment, multiple magnetic bar assemblies 2 are arranged in at least two rows on the needle selection seat 1, and the multiple magnetic bar assemblies 2 arranged in two adjacent rows are staggered in sequence, so that the multiple magnetic bar assemblies 2 can adsorb the corresponding spring needles 3, or release the corresponding spring needles 3, and in the process of the multiple magnetic bar assemblies 2 adsorbing or releasing the corresponding spring needles 3, the movement trajectories of all the spring needles 3 do not overlap, thereby preventing mutual interference between the spring needles 3, thereby ensuring the accuracy of needle selection and improving production efficiency.

[0041] Further, in this embodiment, the needle selection seat 1 includes a first seat body 11 and a second seat body 12, and the first seat body 11 and the second seat body 12 are assembled with each other. A first half cavity is arranged in the first seat body 11, a second half cavity is arranged in the second seat body 12, a first row of magnetic bar assemblies 2 are arranged in the first half cavity, and a second row of magnetic bar assemblies 2 are arranged in the second half cavity.

[0042] A plurality of magnetic rod limiting grooves 111 are arranged at the bottom of the first half cavity and the second half cavity. When the first row of magnetic rod assemblies 2 are arranged in the first half cavity, the plurality of magnetic rod limiting grooves 111 at the bottom of the first half cavity respectively limit the bottom of the plurality of magnetic rod assemblies 2 in the first row; when the second row of magnetic rod assemblies 2 are arranged in the second half cavity, the plurality of magnetic rod limiting grooves 111 at the bottom of the second half cavity respectively limit the bottom of the plurality of magnetic rod assemblies 2 in the second row.

[0043] A plurality of magnetic rod extension openings 112 are provided at the tops of the first half cavity and the second half cavity. When the first row of magnetic rod assemblies 2 are provided in the first half cavity, the tops of the plurality of magnetic rod assemblies 2 in the first row extend through the plurality of magnetic rod extension openings 112 respectively; when the second row of magnetic rod assemblies 2 are provided in the second half cavity, the tops of the plurality of magnetic rod assemblies 2 in the second row extend through the plurality of magnetic rod extension openings 112 respectively, so that the tops of the first row of magnetic rod assemblies 2 in the first half cavity and the tops of the second row of magnetic rod assemblies 2 in the second half cavity can both adsorb their corresponding spring needles 3 or release their corresponding spring needles 3, thereby realizing the needle selection of the needle selector structure.

[0044] In the present application, a plurality of magnetic bar limiting grooves 111 arranged at the bottom of the first half cavity are staggered with a plurality of magnetic bar limiting grooves 111 arranged at the bottom of the second half cavity; a plurality of magnetic bar extension openings 112 arranged at the top of the first half cavity are staggered with a plurality of magnetic bar extension openings 112 arranged at the top of the second half cavity, thereby making the first row of magnetic bar assemblies 2 arranged in the first half cavity staggered with the second row of magnetic bar assemblies 2 arranged in the second half cavity.

[0045] Further, in the present application, a plurality of magnetic bar extension openings 112 arranged at the top of the first half cavity and the second half cavity are open at one end, and a plurality of magnetic bar limiting grooves 111 arranged at the bottom of the first half cavity and the second half cavity are open at one end.

[0046] When installing the first row of magnetic bar assemblies 2 in the first seat body 11 and the second row of magnetic bar assemblies 2 in the second seat body 12, the top of the magnetic bar assembly 2 is slidably inserted into the magnetic bar extension port 112 through the opening of the magnetic bar extension port 112, and at the same time, the bottom of the magnetic bar assembly 2 is slidably inserted into the magnetic bar limiting groove 111 through the opening of the magnetic bar limiting groove 111, thereby making the installation of the first row of magnetic bar assemblies 2 in the first seat body 11 and the installation of the second row of magnetic bar assemblies 2 in the second seat body 12 simpler and more convenient, thereby making the implementation of the needle selector structure simpler and more convenient.

[0047] In the previous embodiment, it is mentioned that the plurality of magnetic bar assemblies 2 are arranged in at least two rows on the needle selection seat 1, and the plurality of magnetic bar assemblies 2 arranged in two adjacent rows are arranged alternately in sequence. Therefore, it can be foreseen that in actual implementation, the first half cavity of the first seat body 11 and the second half cavity of the second seat body 12 are not limited to being provided with one row of magnetic bar assemblies 2, but multiple rows of magnetic bar assemblies 2 can also be provided.

[0048] Specifically, a plurality of rows of magnetic rod limiting grooves 111 may be provided at the bottom of the first half cavity, for limiting the bottom of the plurality of rows of magnetic rod assemblies 2. A plurality of rows of magnetic rod extension openings 112 may be provided at the top of the first half cavity, for allowing the top of the plurality of rows of magnetic rod assemblies 2 to extend, and the plurality of rows of magnetic rod limiting grooves 111 at the bottom of the first half cavity are staggered, and correspondingly, the plurality of rows of magnetic rod extension openings 112 at the top of the first half cavity are also staggered, so that the plurality of rows of magnetic rod assemblies 2 arranged in the first half cavity are staggered. Similarly, a plurality of rows of magnetic rod limiting grooves 111 may be provided at the bottom of the second half cavity, and a plurality of rows of magnetic rod extension openings 112 may be provided at the top, and the plurality of rows of magnetic rod limiting grooves 111 are staggered, and the plurality of rows of magnetic rod extension openings 112 are also staggered.

[0049] It is worth noting that the multiple rows of magnetic bar assemblies 2 in the first half cavity have the same dislocation direction, and when the first base body 11 and the second base body 12 are assembled, the two adjacent rows of magnetic bar assemblies 2 at the junction of the first half cavity and the second half cavity are also dislocated, and the dislocation direction is also consistent with the dislocation direction of the multiple rows of magnetic bar assemblies 2 in the first half cavity, and the remaining multiple rows of magnetic bar assemblies 2 in the second half cavity are all consistent with the dislocation direction of a row of magnetic bar assemblies 2 at the junction, thereby ensuring that the movement trajectories of all spring needles 3 do not overlap.

[0050] Since the end of the spring pin 3 away from the first seat body 11 is sleeved on the rotating shaft 4 through the rotating hole 313, the spring pin 3 is rotatably connected to the rotating shaft 4, and the rotating shaft 4 fixes the position of the end of the spring pin 3 away from the first seat body 11.

[0051] In the present application, multiple magnetic bar assemblies 2 are arranged in at least two rows on the needle selection seat 1. Therefore, when the rotating shaft 4 is set on one side of the needle selection seat 1, there is a difference in the distance between it and each row of magnetic bar assemblies 2. If all spring needles 3 are set to the same length, it is possible that a row of magnetic bar assemblies 2 far away from the rotating shaft 4 cannot adsorb the corresponding spring needles 3.

[0052] Take the example of two rows of magnetic bar assemblies 2 arranged on the needle selection seat 1, wherein the first row of magnetic bar assemblies 2 are arranged in the first half cavity of the first seat body 11, and the second row of magnetic bar assemblies 2 are arranged in the second half cavity of the second seat body 12. In this embodiment, the rotation axis 4 is arranged on one side of the first seat body 11, and it can be foreseen that the distance between the second row of magnetic bar assemblies 2 and the rotation axis 4 is greater than the distance between the first row of magnetic bar assemblies 2 and the rotation axis 4.

[0053] Therefore, in the present application, the multiple spring needles 3 include multiple short needles 32 and multiple long needles 31. When the rotating shaft 4 fixes one end of the multiple long needles 31 and the multiple short needles 32 away from the first base body 11, the multiple short needles 32 extend to the top of the first row of magnetic bar assemblies 2, and the multiple long needles 31 extend to the top of the second row of magnetic bar assemblies 2.

[0054] Since the first row of magnetic bar assemblies 2 and the second row of magnetic bar assemblies 2 are staggered, the multiple short needles 32 and the multiple long needles 31 are staggered, so that the multiple magnetic bar assemblies 2 in the first row can adsorb or release the multiple short needles 32 respectively, and the multiple magnetic bar assemblies 2 in the second row can adsorb or release the multiple long needles 31 respectively, thereby ensuring that the multiple magnetic bar assemblies 2 set on the needle selection seat 1 can adsorb or release the corresponding spring needles 3, thereby realizing the needle selection of the needle selector structure.

[0055] In this embodiment, the magnetic bar assembly 2 further includes a magnetic bar base 25 and a permanent magnet 26 . The permanent magnet 26 is disposed in the magnetic bar base 25 . The first magnetic bar 21 and the second magnetic bar 22 are spaced apart on the magnetic bar base 25 . The permanent magnet 26 is disposed between the first magnetic bar 21 and the second magnetic bar 22 .

[0056] Since the bottom end of the first magnetic bar 21 is in contact with the N pole of the permanent magnet 26, and the bottom end of the second magnetic bar 22 is in contact with the S pole of the permanent magnet 26, the first magnetic bar 21 and the second magnetic bar 22 are magnetized by magnetizing through the permanent magnet 26, and the top end of the first magnetic bar 21 is the N pole, and the top end of the second magnetic bar 22 is the S pole, so that the corresponding spring pin 3 is adsorbed by the magnetic attraction generated by the first magnetic bar 21 and the second magnetic bar 22.

[0057] After the first magnetic bar 21 and the second magnetic bar 22 are magnetized by the permanent magnet 26, it is equivalent to that the first magnetic bar 21 extends the N pole of the permanent magnet 26, and the second magnetic bar 22 extends the S pole of the permanent magnet 26, that is, the first magnetic bar 21, the permanent magnet 26 and the second magnetic bar 22 are regarded as a whole magnet, the first magnetic bar 21 is the N pole of the magnet, and the second magnetic bar 22 is the S pole of the magnet.

[0058] The direction of the magnetic flux lines of the magnet is from the N pole to the S pole outside the magnet, that is, outside the magnet, the magnetic flux lines are transmitted from the top of the first magnetic bar 21 to the top of the second magnetic bar 22 in the air. When the first magnetic bar 21 and the second magnetic bar 22 are attracted to the spring needle 3, the spring needle 3 conducts the top of the first magnetic bar 21 with the top of the second magnetic bar 22, that is, the spring needle 3 conducts the N pole and the S pole of the whole magnet.

[0059] Since the magnetic resistance of the spring needle 3 is much smaller than that of the air, the magnetic flux lines preferentially select the path with the smallest magnetic resistance outside the magnet, so most of the magnetic flux lines are transmitted from the N pole to the S pole in the spring needle 3, thereby preventing the magnetic flux lines outside the magnet from being scattered and reducing the mutual interference with the surrounding magnetic field, and reducing the energy loss of the magnetic flux lines, thereby enhancing the adsorption force of the first magnetic bar 21 and the second magnetic bar 22 on the spring needle 3, thereby ensuring the accuracy of needle selection and improving production efficiency.

[0060] Specifically, in actual implementation, when the magnetic bar assembly 2 is installed in the first half cavity or the second half cavity, each magnetic bar limiting groove 111 limits the magnetic bar base 25 of a magnetic bar assembly 2, and the top of the first magnetic bar 21 and the second magnetic bar 22 of each magnetic bar assembly 2 extends out from a magnetic bar extension port 112, so that the top of the first magnetic bar 21 and the second magnetic bar 22 can simultaneously adsorb or release the corresponding spring needle 3.

[0061] Furthermore, in the present application, a first fixed cavity 251 , a second fixed cavity 252 and a third fixed cavity 253 are provided in the magnetic rod base 25 . The first fixed cavity 251 and the second fixed cavity 252 are spaced apart, and the third fixed cavity 253 is provided between the first fixed cavity 251 and the second fixed cavity 252 .

[0062] When assembling the magnetic bar assembly 2, the bottom of the first magnetic bar 21 is inserted into the first fixed cavity 251, the bottom of the second magnetic bar 22 is inserted into the second fixed cavity 252, and the permanent magnet 26 is arranged in the third fixed cavity 253, so that the first magnetic bar 21 is fixed by the first fixed cavity 251, the second magnetic bar 22 is fixed by the second fixed cavity 252, and the permanent magnet 26 is fixed by the third fixed cavity 253, so that the first magnetic bar 21 and the second magnetic bar 22 are arranged at intervals on the magnetic bar base 25, and the permanent magnet 26 is arranged between the first magnetic bar 21 and the second magnetic bar 22.

[0063] The two ends of the third fixed cavity 253 are respectively connected to the first fixed cavity 251 and the second fixed cavity 252. The N pole and S pole of the permanent magnet 26 are respectively located at the two ends of the permanent magnet 26. Therefore, the N pole of the permanent magnet 26 is in contact with the bottom end of the first magnetic bar 21 at one end of the third fixed cavity 253, and the S pole of the permanent magnet 26 is in contact with the bottom end of the second magnetic bar 22 at the other end of the third fixed cavity 253, so that the first magnetic bar 21, the permanent magnet 26 and the second magnetic bar 22 form a U-shaped integral magnet.

[0064] In the previous embodiment, it is mentioned that outside the overall magnet formed by the permanent magnet 26, the first magnetic bar 21 and the second magnetic bar 22, the magnetic flux lines are propagated from the top of the first magnetic bar 21 to the top of the second magnetic bar 22; and inside the overall magnet, the magnetic flux lines pass through the second magnetic bar 22, the permanent magnet 26, and the first magnetic bar 21 in sequence, and then propagate from the top of the second magnetic bar to the top of the first magnetic bar 21, thereby forming a closed loop with the magnetic flux lines outside the overall magnet.

[0065] Therefore, in the present application, the internal magnetic flux lines of the first magnetic bar 21 after magnetization are propagated from the bottom end of the first magnetic bar 21 to the top end of the first magnetic bar 21, and the internal magnetic flux lines of the second magnetic bar 22 after magnetization are propagated from the top end of the second magnetic bar 22 to the bottom end of the second magnetic bar 22, that is, the internal magnetic flux lines of the first magnetic bar 21 after magnetization are from bottom to top, and the internal magnetic flux lines of the second magnetic bar 22 after magnetization are from top to bottom.

[0066] Therefore, in this embodiment, the first coil 23 is wound around the outer circumference of the first magnetic bar 21 from bottom to top, so that when the first coil 23 is energized, the magnetic field formed in the first coil 23 has a magnetic flux line direction opposite to the internal magnetic flux line direction of the first magnetic bar 21 after magnetization, so that the magnetic field formed in the first coil 23 and the magnetic field of the first magnetic bar 21 after magnetization cancel each other out, reducing the magnetic field strength of the first magnetic bar 21, thereby achieving demagnetization of the first magnetic bar 21.

[0067] The second coil 24 is wound around the outer circumference of the second magnetic bar 22 from top to bottom, so that when the second coil 24 is energized, the magnetic field formed by the second coil 24 has a magnetic flux line direction opposite to the internal magnetic flux line direction of the second magnetic bar 22 after magnetization, so that the magnetic field formed by the second coil 24 and the magnetic field of the second magnetic bar 22 after magnetization cancel each other out, reducing the magnetic field strength of the second magnetic bar 22, thereby achieving demagnetization of the second magnetic bar 22.

[0068] In actual implementation, the first coil 23 and the second coil 24 can use the same set of power supply equipment for current flow, or they can use two sets of power supply equipment for current flow. In order to make the structure of the needle selector more compact and reduce production costs, in this application, it is preferred that the first coil 23 and the second coil 24 use the same set of power supply equipment for current flow.

[0069] Therefore, in the present embodiment, the tail end of the first coil 23 is connected to the head end of the second coil 24, thereby connecting the first coil 23 and the second coil 24 in series; the head end of the first coil 23 is connected to the positive pole of the power supply circuit, and the tail end of the second coil 24 is connected to the negative pole of the power supply circuit, thereby forming a closed loop, so that the power supply circuit can pass current to the first coil 23 and the second coil 24 at the same time, thereby making the structure of the needle selector more compact and reducing the production cost.

[0070] Specifically, in actual implementation, the same enameled wire can be used to make the first coil 23 and the second coil 24, as well as the first coil 23 and the second coil 24 in series, that is, the enameled wire is firstly spirally wound from bottom to top around the outer circumference of the first magnetic bar 21 to form the first coil 23; then, at the top of the first coil 23, the enameled wire is horizontally pulled to the second magnetic bar 22, and spirally wound from top to bottom around the outer circumference of the second magnetic bar 22 to form the second coil 24, thereby realizing the series connection of the first coil 23 and the second coil 24; finally, the head end of the enameled wire is connected to the positive pole of the power supply circuit, and the tail end is connected to the negative pole of the power supply circuit, thereby forming a closed loop, so that the power supply circuit can simultaneously pass current to the first coil 23 and the second coil 24.

[0071] Since the head end of the first coil 23 is located at the bottom of the first coil 23 and the tail end of the second coil 24 is located at the bottom of the second coil 24, it is easier to connect the head end of the first coil 23 to the positive pole of the power supply circuit and the tail end of the second coil 24 to the negative pole of the power supply circuit, thereby making the implementation of the magnetic rod assembly 2 simpler and more convenient, and further improving production efficiency.

[0072] Since the tail end of the first coil 23 is located at the top of the first coil 23 and the head end of the second coil 24 is located at the top of the second coil 24, the first coil 23 and the second coil 24 are connected in series at the top of the first coil 23 and the top of the second coil 24, which can not only reduce the use of enameled wire, thereby reducing production costs, but also make the series connection of the first coil 23 and the second coil 24 simpler, further making the implementation of the magnetic bar assembly 2 simpler and more convenient, thereby improving production efficiency.

[0073] Since the direction of the magnetic field lines of force formed in the energized coil is related to the winding direction of the current in the energized coil, it is worth noting that when the first coil 23 is wound from bottom to top around the outer periphery of the first magnetic bar 21 and the second coil 24 is wound from top to bottom around the outer periphery of the second magnetic bar 22, the connection direction of the current in the first coil 23 and the second coil 24 must be designed according to the right-hand screw rule, so that the direction of the magnetic field lines of force formed in the first coil 23 and the second coil 24 is the above-mentioned direction.

[0074] In this embodiment, the tail end of the second coil 24 extends to the side where the head end of the first coil 23 is located. Specifically, the first coil 23 is formed by first winding the enameled wire from bottom to top in a spiral shape around the outer periphery of the first magnetic bar 21; then, at the top of the first coil 23, the enameled wire is horizontally pulled to the second magnetic bar 22, and then wound from top to bottom in a spiral shape around the outer periphery of the first coil 23 to form the second coil 24, thereby realizing the series connection of the first coil 23 and the second coil 24; Finally, at the bottom of the formed second coil 24, the enameled wire is pulled horizontally to the first magnetic rod 21 so that the tail end and the head end of the enameled wire are on the same side. Therefore, the head end of the enameled wire is connected to the positive pole of the power supply circuit on the same side, and the tail end is connected to the negative pole of the power supply circuit. This can make the connection between the enameled wire and the power supply circuit simpler and more convenient, easier to implement, and the routing of the power supply circuit more regular, thereby making the implementation of the needle selector structure simpler and more convenient, further improving production efficiency.

[0075] Furthermore, in the present embodiment, a wiring groove 254 is provided on one side of the magnetic rod base 25. When the tail end of the second coil 24 extends to the side where the head end of the first coil 23 is located, the head end of the first coil 23 and the tail end of the second coil 24 are both routed through the wiring groove 254. The head end of the first coil 23 and the tail end of the second coil 24 are limited by the wiring groove 254, so that the routing of the first coil 23 and the second coil 24 is more regular, further making the implementation of the needle selector structure simpler and more convenient, thereby improving production efficiency.

[0076] In this embodiment, a wiring hole 113 is provided at the bottom of each magnetic bar limiting groove 111, and the needle selector 1 further includes a control board 13, which is provided at the bottom of the first seat body 11 and the second seat body 12. When the magnetic bar base 25 of the magnetic bar assembly 2 is inserted into the magnetic bar limiting groove 111, the first end of the first coil 23 and the tail end of the second coil 24 that are routed through the wiring groove 254 pass through the wiring hole 113 and are fixedly connected to the control board 13, so that the first end of the first coil 23 and the tail end of the second coil 24 of all the magnetic bar assemblies 2 are integrated on the control board 13, and finally led out through the control board 13 and connected to the positive and negative poles of the power supply circuit, thereby making the wiring of the needle selector structure simpler and facilitating the implementation of the needle selector structure.

[0077] In the present application, the needle selector 1 further includes a housing 14, a cavity is provided in the housing 14, the first seat body 11 and the second seat body 12 are provided at the top of the housing 14, and are fixedly connected to the housing 14, so that the first seat body 11 and the second seat body 12 are fixed by the housing 14. Since the control board 13 is provided at the bottom of the first seat body 11 and the second seat body 12, when the first seat body 11 and the second seat body 12 are fixedly installed at the top of the housing 14, the control board 13 is located in the cavity of the housing 14, so that the control board 13 is protected by the housing 14 to prevent the control board 13 from being exposed, thereby enhancing the safety of the needle selector structure.

[0078] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A needle selector structure, characterized in that: The invention comprises a needle selection seat (1), a plurality of magnetic bar assemblies (2) fixedly mounted on the needle selection seat (1), and a plurality of spring needles (3) arranged above the plurality of magnetic bar assemblies (2); the plurality of magnetic bar assemblies (2) are staggeredly arranged on the needle selection seat (1), and the plurality of spring needles (3) correspond to the plurality of magnetic bar assemblies (2) one by one; the magnetic bar assembly (2) comprises a first magnetic bar (21) and a second magnetic bar (22) arranged at intervals, a first coil (23) arranged on the first magnetic bar (21), and a second coil (24) arranged on the second magnetic bar (22); the first magnetic bar (21) has an N pole at its top end after being magnetized, and the second magnetic bar (22) has an S pole at its top end after being magnetized; the first coil (23) and the second coil (24) have opposite current flow directions; the first coil (23) when energized demagnetizes the first magnetic bar (21), and the second coil (24) when energized demagnetizes the second magnetic bar (22).

2. A needle selector structure as claimed in claim 1, characterized in that: The needle selector structure further comprises a rotating shaft (4) arranged in parallel and spaced relation to the needle selector seat (1); a plurality of spring needles (3) are arranged on the rotating shaft (4) and are rotatably connected to the rotating shaft (4).

3. A needle selector structure as claimed in claim 2, characterized in that: The spring needle (3) comprises a main body (311) having one end rotatably connected to the rotating shaft (4), and a deformation portion (312) arranged at the bottom of the main body (311); a rotating hole (313) is provided at one end of the main body (311) away from the needle selection seat (1); the rotating shaft (4) passes through the rotating holes (313) of the plurality of main bodies (311), so that the plurality of main bodies (311) are rotatably connected to the rotating shaft (4).

4. A needle selector structure as claimed in claim 2, characterized in that: The plurality of magnetic bar assemblies (2) are arranged in at least two rows on the needle selection seat (1), and the magnetic bar assemblies (2) arranged in two adjacent rows are arranged in an alternating manner.

5. A needle selector structure as claimed in claim 4, characterized in that: The needle selection seat (1) comprises a first seat body (11) and a second seat body (12) which are assembled with each other, a first half cavity is provided in the first seat body (11), a second half cavity is provided in the second seat body (12), a plurality of magnetic bar assemblies (2) in a first row are provided in the first half cavity, a plurality of magnetic bar assemblies (2) in a second row are provided in the second half cavity, and the plurality of magnetic bar assemblies (2) in the first row and the plurality of magnetic bar assemblies (2) in the second row are arranged in a staggered manner.

6. A needle selector structure as claimed in claim 5, characterized in that: The rotating shaft (4) is arranged on one side of the first seat (11); the plurality of spring pins (3) include a plurality of long pins (31) and a plurality of short pins (32); the plurality of long pins (31) and the plurality of short pins (32) are arranged alternately on the rotating shaft (4); the plurality of magnetic bar assemblies (2) in the first row are used to respectively absorb or release the plurality of short pins (32); and the plurality of magnetic bar assemblies (2) in the second row are used to respectively absorb or release the plurality of long pins (31).

7. A needle selector structure as claimed in claim 5, characterized in that: The bottom of the first half chamber and the second half chamber are both provided with a plurality of magnetic bar limiting grooves (111), and the top of the first half chamber and the second half chamber are both provided with a plurality of magnetic bar extension openings (112); the plurality of magnetic bar limiting grooves (111) are used to limit the bottoms of the plurality of magnetic bar assemblies (2) respectively; the plurality of magnetic bar extension openings (112) are used to allow the tops of the plurality of magnetic bar assemblies (2) to extend respectively; and the plurality of magnetic bar limiting grooves (111) are used to limit the bottoms of the plurality of magnetic bar assemblies (2) respectively.

8. A needle selector structure as claimed in claim 1, characterized in that: The magnetic bar assembly (2) further comprises a magnetic bar base (25), and a permanent magnet (26) arranged in the magnetic bar base (25); the first magnetic bar (21) and the second magnetic bar (22) are arranged at intervals on the magnetic bar base (25); the permanent magnet (26) is located between the first magnetic bar (21) and the second magnetic bar (22); the bottom end of the first magnetic bar (21) is in contact with the N pole of the permanent magnet (26); and the bottom end of the second magnetic bar (22) is in contact with the S pole of the permanent magnet (26).

9. A needle selector structure as claimed in claim 8, characterized in that: A wiring groove (254) is provided on one side of the magnetic bar base (25), and ends of the first coil (23) and the second coil (24) are both routed in the wiring groove (254).

10. A needle selector structure as claimed in claim 7, characterized in that: The needle selection seat (1) further comprises a control panel (13) arranged at the bottom of the first seat body (11) and the second seat body (12), and a shell (14) for fixing the first seat body (11) and the second seat body (12); the first seat body (11) and the second seat body (12) are fixedly connected to the top of the shell (14); the control panel (13) is arranged in the shell (14); a wiring hole (113) is provided at the bottom of the magnetic bar limiting groove (111); the ends of the first coil (23) and the second coil (24) pass through the wiring hole (113) and are fixed to the control panel (13).

Images