Magnetic bar assembly

Abstract

The utility model relates to and discloses a magnetic bar assembly. Relates to the technical field of needle selectors. The device specifically comprises a magnetic bar base, a first magnetic bar, a second magnetic bar, a first coil arranged on the first magnetic bar, a second coil arranged on the second magnetic bar and a permanent magnet arranged between the first magnetic bar and the second magnetic bar, wherein the first magnetic bar and the second magnetic bar are arranged on the magnetic bar base at an interval; the N pole of the permanent magnet is attached to the first magnetic bar, the S pole of the permanent magnet is attached to the second magnetic bar, and the through-flow directions of the first coil and the second coil are opposite. The first magnetic bar, the permanent magnet and the second magnetic bar are regarded as an integral magnet, the first magnetic bar is the N pole of the magnet, the second magnetic bar is the S pole of the magnet, and the N pole and the S pole of the magnet are conducted through the spring needle, so that magnetic induction lines outside the magnet are spread in the spring needle, magnetic field interference between the magnet and surrounding magnetic bars can be reduced, and the magnetic field interference between the magnet and the surrounding magnetic bars 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 utility model relates to needle selector technical field, especially a kind of magnetic rod assembly. BACKGROUND

[0002] People's daily wear sweater most are the sweater of multiple colors, in the production process, the sweater of one color is woven when, the sweater of other color needs to stop operation, thus needs to stop selecting and stopping the sweater of various colors in the process of weaving. Currently, computer-controlled electromagnetic needle selector technology is generally used in market to control flat knitting machine to select needle, and then realize the re-needle selection of sweater color, to form the sweater of various colors by the frequent operation of needle selector.

[0003] Currently, the needle selector of flat knitting machine mostly adopts electromagnetic needle selector. The electromagnetic needle selector is widely used due to its simple structure and convenient use. The electromagnetic needle selector is usually provided with a corresponding number of magnetic rod assemblies corresponding to spring needles of the flat knitting machine. By magnetizing or demagnetizing the corresponding magnetic rod assemblies, the corresponding spring needles are adsorbed or released, so as to achieve the purpose of needle selection.

[0004] In the prior art, the number of magnetic rods in the magnetic rod assembly of the needle selector for a single spring needle is also single, and the magnetic pole is single. The magnetic field is scattered, and the magnetic field interference is large. When the magnetic rod assembly adsorbs or releases the corresponding spring needle, it is easy to generate a large magnetic force on the surrounding magnetic rod assemblies and spring needles, which may cause needle selection error and weaving error, thereby affecting production efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiencies of the prior art, and provides a magnetic rod assembly, which can reduce the magnetic force interference between the magnetic rod assemblies, thereby ensuring the accuracy of needle selection and improving production efficiency.

[0006] The utility model provides a magnetic rod assembly, which comprises a magnetic rod base, first and second magnetic rods arranged at intervals on the magnetic rod base, a first coil arranged on the first magnetic rod, a second coil arranged on the second magnetic rod, and a permanent magnet arranged between the first and second magnetic rods; the N-pole of the permanent magnet is attached to the first magnetic rod to magnetize the first magnetic rod, the S-pole of the permanent magnet is attached to the second magnetic rod to magnetize the second magnetic rod, the current directions of the first and second coils are opposite, the first coil is de-magnetized when electrified, and the second coil is de-magnetized when electrified.

[0007] Further, the magnetic rod base is internally provided with a first fixing cavity and a second fixing cavity, the first fixing cavity and the second fixing cavity are arranged at intervals, the bottom of the first magnetic rod is inserted into the first fixing cavity, and the bottom of the second magnetic rod is inserted into the second fixing cavity.

[0008] Further, the magnetic rod base is internally provided with a first fixing cavity and a second fixing cavity, the first fixing cavity and the second fixing cavity are arranged at intervals, the bottom of the first magnetic rod is inserted into the first fixing cavity, and the bottom of the second magnetic rod is inserted into the second fixing cavity.

[0009] Further, the first magnetic rod is provided with a first limiting plate, the second magnetic rod is provided with a second limiting plate, and the first limiting plate and the second limiting plate are in abutment with the top of the permanent magnet.

[0010] Further, the first coil is spirally wound on the outer periphery of the first magnetic rod from bottom to top, the second coil is spirally wound on the outer periphery of the second magnetic rod from top to bottom, the leading end of the first coil is connected with the positive pole of the power supply circuit, the trailing end of the second coil is connected with the negative pole of the power supply circuit, and the trailing end of the first coil is connected with the leading end of the second coil.

[0011] Further, the trailing end of the second coil extends to the side where the leading end of the first coil is located, so that the trailing end of the second coil and the leading end of the first coil are wired on the same side.

[0012] Further, one side of the magnetic rod base is provided with a wiring groove for wiring of the leading end of the first coil and the trailing end of the second coil.

[0013] Further, the magnetic rod assembly further comprises an isolation sheet arranged between the first magnetic rod and the second magnetic rod, and the isolation sheet isolates the first magnetic rod from the second magnetic rod.

[0014] Further, the top of the first magnetic rod is provided with a first contact surface, the top of the second magnetic rod is provided with a second contact surface, and the first contact surface and the second contact surface are on the same horizontal plane.

[0015] Further, the first magnetic rod comprises a main body portion extending in a vertical direction, an inclined portion arranged at the top of the main body portion, and an extension portion arranged at the top of the inclined portion, the inclined portion is inclined towards the second magnetic rod, the extension portion extends in a vertical direction, and the first contact surface is arranged at the top of the extension portion.

[0016] The magnetic rod assembly has the following beneficial effects:

[0017] (1) the first magnetic rod of the magnetic rod assembly is attached to the N pole of the permanent magnet, and the second magnetic rod is attached to the S pole of the permanent magnet, the first magnetic rod, the permanent magnet and the second magnetic rod are regarded as a whole magnet, the first magnetic rod is the N pole of the magnet, and the second magnetic rod is the S pole of the magnet, the N pole and the S pole of the magnet are connected through the spring needle, the magnetic induction lines outside the magnet are propagated in the spring needle, so that the magnetic field interference between the magnetic rod and the surrounding magnetic rod is reduced, the energy loss of the magnetic induction lines is reduced, the accuracy of needle selection is ensured, and the production efficiency is improved;

[0018] (2) the first coil of the magnetic rod assembly is arranged on the first magnetic rod, and the second coil is arranged on the second magnetic rod, the first magnetic rod is demagnetized by energizing the first coil, and the second magnetic rod is demagnetized by energizing the second coil, so that the first magnetic rod and the second magnetic rod simultaneously release the attracted spring needle, and the needle selection is realized;

[0019] (3) the magnetic rod base of the magnetic rod assembly is provided with a first fixing cavity and a second fixing cavity, the first fixing cavity and the second fixing cavity are arranged at intervals, the bottom of the first magnetic rod is inserted into the first fixing cavity, and the bottom of the second magnetic rod is inserted into the second fixing cavity, so that the first magnetic rod is fixed by the first fixing cavity, and the second magnetic rod is fixed by the second fixing cavity, so that the first magnetic rod and the second magnetic rod are arranged at intervals on the magnetic rod base;

[0020] (4) the magnetic rod base of the magnetic rod assembly is further provided with a third fixing cavity, the permanent magnet is arranged in the third fixing cavity, and the two ends of the third fixing cavity are communicated with the first fixing cavity and the second fixing cavity respectively, so that when the bottom of the first magnetic rod is inserted into the first fixing cavity, the bottom of the second magnetic rod is inserted into the second fixing cavity, and the permanent magnet is arranged in the third fixing cavity, the N pole of the permanent magnet is attached to the bottom of the first magnetic rod at one end of the third fixing cavity, and the S pole of the permanent magnet is attached to the bottom of the second magnetic rod at the other end of the third fixing cavity, so that the first magnetic rod, the permanent magnet and the second magnetic rod form a U-shaped whole magnet;

[0021] (5) the manufacturing of the first coil and the second coil of the magnetic rod assembly, and the series connection of the first coil and the second coil can adopt the same enameled wire, so that the use of enameled wire is reduced, the production cost is reduced, the series connection of the first coil and the second coil is simpler, the implementation of the magnetic rod assembly is simpler and more convenient, and the production efficiency is further improved;

[0022] (6) The second coil tail end of the magnetic rod assembly extends to the side where the first coil head end is located, so that the tail end of the second coil and the head end of the first coil are located on the same side, and thus the head end of the first coil is connected with the positive pole of the power supply circuit and the tail end of the second coil is connected with the negative pole of the power supply circuit on the same side, which can make the connection of the first coil and the second coil with the power supply circuit more simple and convenient, easy to implement, and the wiring of the power supply circuit is more regular, so that the implementation of the magnetic rod assembly is more simple and convenient, and the production efficiency is further improved;

[0023] (7) The magnetic rod base of the magnetic rod assembly is provided with a wiring slot on one side, so that the head end of the first coil and the tail end of the second coil are both wired from the wiring slot when the tail end of the second coil extends to the side where the head end of the first coil is located, and the head end of the first coil and the tail end of the second coil are limited by the wiring slot, so that the wiring of the first coil and the second coil is more regular, and the implementation of the magnetic rod assembly is more simple and convenient, and the production efficiency is improved;

[0024] (8) The first magnetic rod of the magnetic rod assembly comprises a main body part, an inclined part and an extension part, the inclined part is inclined at the top of the main body part towards the direction of the second magnetic rod, the extension part is arranged at the top of the inclined part, so that the distance between the extension part and the second winding shaft is smaller than the distance between the main body part and the second winding shaft, and the first contact surface is arranged at the top of the extension part, so that the distance between the first contact surface and the second contact surface can be reduced, and it is ensured that the first contact surface and the second contact surface can contact different positions of the spring needle. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment of the present application and, together with the description, serve to explain the principles of the present application. In these drawings, like reference numerals are used to represent similar elements.

[0026] Figure 1 It is a structural schematic view of a magnetic rod assembly of an embodiment of the present application;

[0027] Figure 2 It is a sectional schematic view of a magnetic rod assembly of an embodiment of the present application;

[0028] Figure 3 It is a structural schematic view of a magnetic rod base of a magnetic rod assembly of an embodiment of the present application;

[0029] Figure 4 It is a structural schematic view of a first magnetic rod of a magnetic rod assembly of an embodiment of the present application;

[0030] Figure 5 It is a structural schematic view of a second magnetic rod of a magnetic rod assembly of an embodiment of the present application.

[0031] In the figure: 1, magnetic rod base; 11, first fixed cavity; 12, second fixed cavity; 13, third fixed cavity; 14, wiring groove; 2, first magnetic rod; 21, first limiting plate; 22, main body; 23, inclined portion; 24, extension; 241, first contact surface; 3, second magnetic rod; 31, second limiting plate; 32, second contact surface; 4, first coil; 5, second coil; 6, permanent magnet; 7, isolation sheet. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the following will combine the drawings in the utility model embodiment, clearly and completely describe the technical scheme in the utility model embodiment, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the scope of protection of the utility model.

[0033] Please refer to Figures 1-5 The utility model embodiment relates to a magnetic rod assembly, which comprises a magnetic rod base 1, first and second magnetic rods 2 and 3 arranged at intervals on the magnetic rod base 1, a first coil 4 arranged on the first magnetic rod 2, a second coil 5 arranged on the second magnetic rod 3, and a permanent magnet 6 arranged between the first and second magnetic rods 2 and 3; the N-pole of the permanent magnet 6 is attached to the first magnetic rod 2 to magnetize the first magnetic rod 2, the S-pole of the permanent magnet 6 is attached to the second magnetic rod 3 to magnetize the second magnetic rod 3, the current flow directions of the first and second coils 4 and 5 are opposite, the first coil 4 is electrified to demagnetize the first magnetic rod 2, and the second coil 5 is electrified to demagnetize the second magnetic rod 3.

[0034] In the present application, the magnetic rod assembly comprises a magnetic rod base 1, first and second magnetic rods 2 and 3, and a permanent magnet 6; the first and second magnetic rods 2 and 3 are arranged at intervals on the magnetic rod base 1, and the permanent magnet 6 is arranged between the first and second magnetic rods 2 and 3. Since the first magnetic rod 2 is attached to the N-pole of the permanent magnet 6 and the second magnetic rod 3 is attached to the S-pole of the permanent magnet 6, the first and second magnetic rods 2 and 3 are magnetized by the permanent magnet 6, and the end of the first magnetic rod 2 away from the permanent magnet 6 is N-pole and the end of the second magnetic rod 3 away from the permanent magnet 6 is S-pole, so that the magnetic attraction generated by the first and second magnetic rods 2 and 3 can attract the corresponding spring needle.

[0035] After the first and second magnetic rods 2 and 3 are magnetized by the permanent magnet 6, the first magnetic rod 2 extends to the N-pole of the permanent magnet 6 and the second magnetic rod 3 extends to the S-pole of the permanent magnet 6, that is, the first magnetic rod 2, the permanent magnet 6 and the second magnetic rod 3 are regarded as a whole magnet, the first magnetic rod 2 is N-pole of the magnet, and the second magnetic rod 3 is S-pole of the magnet.

[0036] Because of the direction of the magnetic flux of the magnet, outside the magnet is from N pole to S pole, inside the magnet is from S pole to N pole, and in the prior art, the magnetic rod assembly for a single spring needle is of the same magnetic pole.

[0037] Therefore, outside the magnetic rod assembly, the magnetic flux is in the air from N pole to S pole, and the magnetic flux propagating in the air has a loop stray and a large energy loss, thus easily interfering with the magnetic field of the surrounding magnetic rod assembly and reducing the adsorption force of the magnetic rod assembly on the corresponding spring needle, which may cause needle selection error, weaving error and affect production efficiency.

[0038] In the present application, the first magnetic rod 2, the permanent magnet 6 and the second magnetic rod 3 form a whole magnet, the first magnetic rod 2 is the N pole of the magnet, and the second magnetic rod 3 is the S pole of the magnet. The direction of the magnetic flux of the magnet is from N pole to S pole outside the magnet, that is, outside the magnet, the magnetic flux is in the air from the end of the first magnetic rod 2 away from the permanent magnet 6 to the end of the second magnetic rod 3 away from the permanent magnet 6. When the first magnetic rod 2 and the second magnetic rod 3 adsorb the spring needle, the spring needle connects the end of the first magnetic rod 2 away from the permanent magnet 6 and the end of the second magnetic rod 3 away from the permanent magnet 6, that is, the spring needle connects the N pole and the S pole of the whole magnet.

[0039] Because the magnetic resistance of the spring needle is much smaller than that of the air, outside the magnet, the magnetic flux preferentially selects the path with the smallest magnetic resistance, so most of the magnetic flux is in the spring needle from N pole to S pole, thus preventing the loop of the magnetic flux outside the magnet from being scattered, reducing the mutual interference with the surrounding magnetic field, reducing the energy loss of the magnetic flux, enhancing the adsorption force of the first magnetic rod 2 and the second magnetic rod 3 on the spring needle, and thus ensuring the accuracy of needle selection and improving production efficiency.

[0040] In the present application, the magnetic rod assembly further comprises a first coil 4 and a second coil 5, the first coil 4 is arranged on the first magnetic rod 2, and the second coil 5 is arranged on the second magnetic rod 3. It can be predicted that in the present application, the first magnetic rod 2 and the second magnetic rod 3 are made of soft magnetic material, so after the first magnetic rod 2 and the second magnetic rod 3 are magnetized, they can simultaneously generate a magnetic attraction force on the corresponding spring needle, causing the spring needle to elastically deform, thereby adsorbing the spring needle on the first magnetic rod 2 and the second magnetic rod 3.

[0041] When the first coil 4 is energized, the magnetic field formed in the first coil 4 has a direction opposite to the internal magnetic flux direction of the first magnetic rod 2 after magnetization, so the magnetic field formed in the first coil 4 and the magnetic field of the first magnetic rod 2 after magnetization cancel each other out, thereby reducing the magnetic field strength of the first magnetic rod 2 and achieving demagnetization of the first magnetic rod 2.

[0042] When the second coil 5 is powered, the magnetic field formed in the second coil 5 is opposite to the internal magnetic field of the second magnetic bar 3 after magnetization, so the magnetic field formed in the second coil 5 and the magnetic field of the second magnetic bar 3 after magnetization offset each other, thereby reducing the magnetic field intensity of the second magnetic bar 3 and realizing demagnetization of the second magnetic bar 3.

[0043] When the magnetic attraction of the first magnetic bar 2 and the second magnetic bar 3 to the spring needle is less than the elastic force of the spring needle to restore its deformation, the first magnetic bar 2 and the second magnetic bar 3 release the absorbed spring needle, so that the spring needle restores to the original shape. Therefore, in the present application, the first magnetic bar 2 and the second magnetic bar 3 absorb or release the corresponding spring needle, so that the position of the corresponding spring needle changes, thereby realizing needle selection.

[0044] In one embodiment, initially, the first magnetic bar 2 and the second magnetic bar 3 do not absorb the corresponding spring needle, and at this time, the spring needle is in a non-working position; when selecting a needle, the first magnetic bar 2 and the second magnetic bar 3 absorb the corresponding spring needle, so that the spring needle moves from the non-working position to the working position and performs knitting work; after the work is completed, the first coil 4 and the second coil 5 are powered, and the first magnetic bar 2 and the second magnetic bar 3 release the corresponding spring needle, so that the spring needle returns to the non-working position and waits for the next knitting work.

[0045] In another embodiment, initially, the first magnetic bar 2 and the second magnetic bar 3 absorb the corresponding spring needle, and at this time, the spring needle is in a non-working position; when selecting a needle, the first coil 4 and the second coil 5 are powered, and the first magnetic bar 2 and the second magnetic bar 3 release the corresponding spring needle, so that the spring needle moves from the non-working position to the working position and performs knitting work; after the work is completed, the first coil 4 and the second coil 5 are powered, and the first magnetic bar 2 and the second magnetic bar 3 release the corresponding spring needle, so that the spring needle returns to the non-working position and waits for the next knitting work.

[0046] The magnetic bar assembly of the present application is suitable for a needle selector of a flat knitting machine such as a glove machine, a flat machine, a collar machine, etc., that is, the magnetic bar assembly simultaneously absorbs or releases the corresponding spring needle of the flat knitting machine such as a glove machine, a flat machine, a collar machine, etc., so as to realize needle selection of the flat knitting machine such as a glove machine, a flat machine, a collar machine, etc.

[0047] In the present embodiment, the magnetic bar base 1 is provided with a first fixed cavity 11 and a second fixed cavity 12, and the first fixed cavity 11 and the second fixed cavity 12 are arranged at intervals. When assembling the magnetic bar assembly, the bottom of the first magnetic bar 2 is inserted into the first fixed cavity 11, and the bottom of the second magnetic bar 3 is inserted into the second fixed cavity 12, so as to fix the first magnetic bar 2 through the first fixed cavity 11 and fix the second magnetic bar 3 through the second fixed cavity 12, so that the first magnetic bar 2 and the second magnetic bar 3 are arranged at intervals on the magnetic bar base 1.

[0048] Since the N pole and the S pole of the permanent magnet 6 are located at two ends of the permanent magnet 6 respectively, the first magnetic bar 2 and the second magnetic bar 3 are arranged at intervals on the magnetic bar base 1, the first magnetic bar 2 is attached to the N pole of the permanent magnet 6, and the second magnetic bar 3 is attached to the S pole of the permanent magnet 6, so that the first magnetic bar 2, the permanent magnet 6 and the second magnetic bar 3 form a U-shaped whole magnet, the first magnetic bar 2 is the N pole of the magnet, and the second magnetic bar 3 is the S pole of the magnet.

[0049] Therefore, the spring needle is simultaneously adsorbed by the first magnetic bar 2 and the second magnetic bar 3, which can increase the adsorption force of the spring needle and reduce the magnetic field interference between the plurality of magnetic bar assemblies, thereby ensuring the accuracy of needle selection and improving the production efficiency.

[0050] In the embodiment, the magnetic bar base 1 is further provided with a third fixed cavity 13, and the two ends of the third fixed cavity 13 are communicated with the first fixed cavity 11 and the second fixed cavity 12 respectively. When the magnetic bar assembly is assembled, the bottom of the first magnetic bar 2 is inserted into the first fixed cavity 11, the bottom of the second magnetic bar 3 is inserted into the second fixed cavity 12, and the permanent magnet 6 is arranged in the third fixed cavity 13, so that the first magnetic bar 2 is fixed by the first fixed cavity 11, the second magnetic bar 3 is fixed by the second fixed cavity 12, and the permanent magnet 6 is fixed by the third fixed cavity 13, so that the first magnetic bar 2 and the second magnetic bar 3 are arranged at intervals on the magnetic bar base 1, and the permanent magnet 6 is arranged between the first magnetic bar 2 and the second magnetic bar 3.

[0051] Since the two ends of the third fixed cavity 13 are communicated with the first fixed cavity 11 and the second fixed cavity 12 respectively, when the bottom of the first magnetic bar 2 is inserted into the first fixed cavity 11, the bottom of the second magnetic bar 3 is inserted into the second fixed cavity 12, and the permanent magnet 6 is arranged in the third fixed cavity 13, the N pole of the permanent magnet 6 is attached to the bottom of the first magnetic bar 2 at one end of the third fixed cavity 13, and the S pole of the permanent magnet 6 is attached to the bottom of the second magnetic bar 3 at the other end of the third fixed cavity 13, so that the first magnetic bar 2, the permanent magnet 6 and the second magnetic bar 3 form a U-shaped whole magnet.

[0052] In the embodiment, the first magnetic bar 2 is provided with a first limiting plate 21, and the second magnetic bar 3 is provided with a second limiting plate 31. When the magnetic bar assembly is assembled, the permanent magnet 6 is first placed in the third fixed cavity 13, then the bottom of the first magnetic bar 2 is inserted into the first fixed cavity 11, and the bottom of the second magnetic bar 3 is inserted into the second fixed cavity 12, so that the first limiting plate 21 on the first magnetic bar 2 and the second limiting plate 31 on the second magnetic bar 3 are both in abutment with the top of the permanent magnet 6, and therefore the permanent magnet 6 is limited by the first limiting plate 21 and the second limiting plate 31 and fixed in the third fixed cavity 13.

[0053] In addition, when the first magnetic rod 2, the second magnetic rod 3 and the permanent magnet 6 are installed on the magnetic rod base 1, at the N-pole end of the permanent magnet 6, the first magnetic rod 2 can increase the contact area with the permanent magnet 6 by abutting against the top of the permanent magnet 6 through the first limiting plate 21; at the S-pole end of the permanent magnet 6, the second magnetic rod 3 can increase the contact area with the permanent magnet 6 by abutting against the top of the permanent magnet 6 through the second limiting plate 31, thereby enhancing the magnetization effect of the first magnetic rod 2 and the second magnetic rod 3, and further enhancing the adsorption force of the first magnetic rod 2 and the second magnetic rod 3 on the spring needle, so as to ensure the accuracy of needle selection.

[0054] In the foregoing embodiment, it is mentioned that the magnetic induction lines of the whole magnet formed by the permanent magnet 6, the first magnetic rod 2 and the second magnetic rod 3 are propagated from the end of the first magnetic rod 2 away from the permanent magnet 6 to the end of the second magnetic rod 3 away from the permanent magnet 6 outside the whole magnet, while the magnetic induction lines of the inside of the whole magnet are propagated from the end of the second magnetic rod 3 away from the permanent magnet 6 to the end of the first magnetic rod 2 away from the permanent magnet 6 after sequentially passing through the second magnetic rod 3, the permanent magnet 6 and the first magnetic rod 2, thereby forming a closed loop with the magnetic induction lines outside the whole magnet.

[0055] Therefore, in the present application, the internal magnetic induction lines of the first magnetic rod 2 after magnetization are propagated from the bottom of the first magnetic rod 2 to the top of the first magnetic rod 2, and the internal magnetic induction lines of the second magnetic rod 3 after magnetization are propagated from the top of the second magnetic rod 3 to the bottom of the second magnetic rod 3, that is, the internal magnetic induction lines of the first magnetic rod 2 after magnetization are from bottom to top, and the internal magnetic induction lines of the second magnetic rod 3 after magnetization are from top to bottom.

[0056] Therefore, in the present embodiment, the first coil 4 is wound around the outer periphery of the first magnetic rod 2 from bottom to top, so that when the first coil 4 is electrified, the magnetic field formed in the first coil 4 has a magnetic induction line direction opposite to that of the internal magnetic induction lines of the first magnetic rod 2 after magnetization, that is, the magnetic field formed in the first coil 4 has a magnetic induction line direction from top to bottom, thereby causing the magnetic field formed in the first coil 4 and the magnetic field of the first magnetic rod 2 after magnetization to offset each other, reducing the magnetic field strength of the first magnetic rod 2, and further realizing the demagnetization of the first magnetic rod 2.

[0057] The second coil 5 is wound around the outer periphery of the second magnetic rod 3 from top to bottom, so that when the second coil 5 is electrified, the magnetic field formed by the second coil 5 has a magnetic induction line direction opposite to that of the internal magnetic induction lines of the second magnetic rod 3 after magnetization, that is, the magnetic field formed in the second coil 5 has a magnetic induction line direction from bottom to top, thereby causing the magnetic field formed by the second coil 5 and the magnetic field of the second magnetic rod 3 after magnetization to offset each other, reducing the magnetic field strength of the second magnetic rod 3, and further realizing the demagnetization of the second magnetic rod 3.

[0058] In actual implementation, the first coil 4 and the second coil 5 can adopt the same power supply device to pass current, or can adopt two sets of power supply devices to pass current. In order to make the structure of the needle selector more compact and reduce the production cost, in the present application, the first coil 4 and the second coil 5 adopt the same power supply device to pass current.

[0059] Therefore, in the present embodiment, the tail end of the first coil 4 is connected with the head end of the second coil 5, so as to connect the first coil 4 and the second coil 5 in series; the head end of the first coil 4 is connected with the positive pole of the power supply circuit, and the tail end of the second coil 5 is connected with the negative pole of the power supply circuit, so as to form a closed loop, so that the power supply circuit can pass current to the first coil 4 and the second coil 5 at the same time, and the structure of the needle selector is more compact and the production cost is reduced.

[0060] Specifically, in actual implementation, the same enameled wire can be used to manufacture the first coil 4 and the second coil 5, and to connect the first coil 4 and the second coil 5 in series, that is, the enameled wire is first wound in a spiral shape from bottom to top around the outer periphery of the first magnetic bar 2 to form the first coil 4; then the enameled wire is pulled horizontally to the second magnetic bar 3 at the top of the first coil 4, and is wound in a spiral shape from top to bottom around the outer periphery of the second magnetic bar 3 to form the second coil 5, so as to connect the first coil 4 and the second coil 5 in series; finally, the head end of the enameled wire is connected with the positive pole of the power supply circuit, and the tail end of the enameled wire is connected with the negative pole of the power supply circuit, so as to form a closed loop, so that the power supply circuit can pass current to the first coil 4 and the second coil 5 at the same time.

[0061] Since the head end of the first coil 4 is located at the bottom of the first coil 4, and the tail end of the second coil 5 is located at the bottom of the second coil 5, the operation of connecting the head end of the first coil 4 with the positive pole of the power supply circuit and connecting the tail end of the second coil 5 with the negative pole of the power supply circuit is more easily realized, so that the implementation of the present magnetic bar assembly is more simple and convenient, and the production efficiency is further improved.

[0062] In addition, since the tail end of the first coil 4 is located at the top of the first coil 4, and the head end of the second coil 5 is located at the top of the second coil 5, the connection of the first coil 4 and the second coil 5 is performed at the top of the first coil 4 and the top of the second coil 5, which can not only reduce the use of enameled wire and thus reduce the production cost, but also make the connection of the first coil 4 and the second coil 5 more simple, so that the implementation of the present magnetic bar assembly is more simple and convenient, and the production efficiency is improved.

[0063] Due to the magnetic field formed in the energized coil, the direction of its magnetic induction lines is related to the winding direction of the current in the coil. Therefore, in actual implementation, it is worth noting that when the first coil 4 is wound from bottom to top around the outer periphery of the first magnetic bar 2 and the second coil 5 is wound from top to bottom around the outer periphery of the second magnetic bar 3, the direction of the current in the first coil 4 and the second coil 5 should be designed according to the right-hand rule, so that the magnetic field formed in the first coil 4 and the second coil 5 has the above-mentioned direction of the magnetic induction lines.

[0064] In this embodiment, the tail end of the second coil 5 extends to the side where the head end of the first coil 4 is located. Specifically, the first coil 4 is first formed by spirally winding a lacquered wire around the outer periphery of the first magnetic bar 2 from bottom to top; then the top of the first coil 4 is pulled horizontally to the second magnetic bar 3, and the second coil 5 is formed by spirally winding the lacquered wire around the outer periphery of the first coil 4 from top to bottom, thereby realizing the series connection of the first coil 4 and the second coil 5.

[0065] Finally, the tail end of the lacquered wire is pulled horizontally to the first magnetic bar 2 at the bottom of the formed second coil 5, so that the tail end and the head end of the lacquered wire are located on the same side. Therefore, the head end of the lacquered 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 on the same side, which can make the connection of the lacquered wire and the power supply circuit more simple and convenient, easy to implement, and the wiring of the power supply circuit more regular, thereby making the implementation of the magnetic bar assembly more simple and convenient and further improving the production efficiency.

[0066] Further, in this embodiment, a wiring slot 14 is provided on one side of the magnetic bar base 1. When the tail end of the second coil 5 extends to the side where the head end of the first coil 4 is located, the head end of the first coil 4 and the tail end of the second coil 5 are both wired from the wiring slot 14. The head end of the first coil 4 and the tail end of the second coil 5 are limited by the wiring slot 14, thereby making the wiring of the first coil 4 and the second coil 5 more regular, further making the implementation of the magnetic bar assembly more simple and convenient, and improving the production efficiency.

[0067] In this embodiment, the first magnetic bar 2 and the second magnetic bar 3 both extend in the vertical direction and are arranged at intervals. The N pole of the permanent magnet 6 extends vertically upward after the first magnetic bar 2 is magnetized by the N pole of the permanent magnet 6 by contacting the bottom end of the first magnetic bar 2 with the N pole of the permanent magnet 6. The S pole of the permanent magnet 6 extends vertically upward after the second magnetic bar 3 is magnetized by the S pole of the permanent magnet 6 by contacting the bottom end of the second magnetic bar 3 with the S pole of the permanent magnet 6.

[0068] A first contact surface 241 is provided at the top end of the first magnetic bar 2, and a second contact surface 32 is provided at the top end of the second magnetic bar 3. The magnetic induction lines propagate from the first contact surface 241 to the second contact surface 32 in the air outside the overall magnet formed by the permanent magnet 6, the first magnetic bar 2 and the second magnetic bar 3.

[0069] When the first magnetic rod 2 and the second magnetic rod 3 adsorb the spring needle, the first contact surface 241 and the second contact surface 32 are in contact with the spring needle at the same time, so that the first contact surface 241 and the second contact surface 32 are conducted through the spring needle, the magnetic induction lines transmitted by the first contact surface 241 are transmitted to the second contact surface 32, and then are transmitted in the spring needle, thereby reducing the dispersion of the magnetic induction lines and the mutual interference with the surrounding magnetic field, reducing the energy loss of the magnetic induction lines, and enhancing the adsorption of the first magnetic rod 2 and the second magnetic rod 3 to the spring needle.

[0070] In the present application, the first contact surface 241 and the second contact surface 32 are arranged on the same horizontal plane. As mentioned above, when the first magnetic rod 2 and the second magnetic rod 3 adsorb the spring needle, the first contact surface 241 and the second contact surface 32 are in contact with the spring needle at the same time.

[0071] Therefore, in the present application, the first contact surface 241 and the second contact surface 32 are arranged on the same horizontal plane, so that the first contact surface 241 and the second contact surface 32 can better contact the spring needle when the first magnetic rod 2 and the second magnetic rod 3 adsorb the spring needle, so that the spring needle can better conduct the first contact surface 241 and the second contact surface 32, further reduce the dispersion of the magnetic induction lines, enhance the adsorption of the first magnetic rod 2 and the second magnetic rod 3 to the spring needle, and further ensure the accuracy of needle selection and improve the production efficiency.

[0072] In the present embodiment, the magnetic rod assembly further comprises a separation sheet 7 arranged between the first magnetic rod 2 and the second magnetic rod 3. Specifically, the separation sheet 7 is arranged at the end of the first magnetic rod 2 and the second magnetic rod 3 away from the permanent magnet 6, that is, the separation sheet 7 is arranged at the position close to the top end of the first magnetic rod 2 and the second magnetic rod 3, so as to isolate the end of the first magnetic rod 2 and the second magnetic rod 3 away from the permanent magnet 6 by the separation sheet 7. It can be predicted that in actual implementation, the separation sheet 7 can be made of non-magnetic material, such as copper, aluminum, stainless steel, etc., so that the separation sheet 7 can isolate the first magnetic rod 2 and the second magnetic rod 3.

[0073] In the present application, the end of the first magnetic rod 2 and the second magnetic rod 3 away from the permanent magnet 6 is isolated by the separation sheet 7, so as to prevent the end of the first magnetic rod 2 and the second magnetic rod 3 away from the permanent magnet 6 from directly contacting, thereby preventing the magnetic induction lines from being transmitted from the position where the first magnetic rod 2 and the second magnetic rod 3 directly contact to the second magnetic rod 3 outside the overall magnet formed by the permanent magnet 6, the first magnetic rod 2 and the second magnetic rod 3, reducing the magnetic induction lines transmitted from the spring needle, and further enhancing the adsorption of the first magnetic rod 2 and the second magnetic rod 3 to the spring needle.

[0074] In the embodiment, the first magnetic rod 2 comprises a main body part 22, an inclined part 23 and an extension part 24, the main body part 22 is arranged in parallel and spaced apart with the second magnetic rod 3, the extension part 24 is also arranged in parallel and spaced apart with the second magnetic rod 3, the inclined part 23 is arranged on the top of the main body part 22, and the extension part 24 is arranged on the top of the inclined part 23, so that the extension part 24 is connected with the main body part 22 through the inclined part 23.

[0075] In the application, the main body part 22, the inclined part 23 and the extension part 24 are in an integrated structure, so that after the first magnetic rod 2 is magnetized by the permanent magnet 6 by contacting the bottom end of the main body part 22 with the N-pole of the permanent magnet 6, the top end of the extension part 24 is in the N-pole.

[0076] The first contact surface 241 is arranged on the top of the extension part 24, and the extension part 24 extends vertically upward on the top of the inclined part 23, so that the first contact surface 241 is on the same horizontal plane with the second contact surface 32, thereby making the first contact surface 241 and the second contact surface 32 better contact the spring needle.

[0077] Since the size of the spring needle is small, in order to prevent the first contact surface 241 and the second contact surface 32 from being unable to simultaneously contact different positions of the spring needle, in the application, the inclined part 23 is inclined on the top of the main body part 22 towards the direction of the second magnetic rod 3, so that the spacing between the extension part 24 and the second magnetic rod 3 is smaller than the spacing between the main body part 22 and the second magnetic rod 3, thereby being able to reduce the spacing between the first contact surface 241 and the second contact surface 32, and ensure that the first contact surface 241 and the second contact surface 32 can contact different positions of the spring needle.

[0078] In actual implementation, the isolation sheet 7 can be arranged between the extension part 24 and the second magnetic rod 3, so that the isolation sheet 7 isolates the extension part 24 from the second magnetic rod 3, thereby isolating the first magnetic rod 2 and the second magnetic rod 3. Since the spacing between the extension part 24 and the second magnetic rod 3 is smaller than the spacing between the main body part 22 and the second magnetic rod 3, compared with arranging the isolation sheet 7 between the main body part 22 and the second magnetic rod 3, arranging the isolation sheet 7 between the extension part 24 and the second magnetic rod 3 can reduce the thickness of the isolation sheet 7, thereby reducing the production cost.

[0079] The above-described content can be implemented alone or in various combinations, and these variants are within the protection scope of the utility model.

[0080] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0081] Finally, it should be noted that the above embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A magnetic bar assembly, characterized by: The magnet rod base (1) is internally provided with a first fixed cavity (11) and a second fixed cavity (12), the first fixed cavity (11) and the second fixed cavity (12) are arranged at intervals, the bottom of the first magnet rod (2) is inserted into the first fixed cavity (11), and the bottom of the second magnet rod (3) is inserted into the second fixed cavity (12).

2. A magnetic bar assembly as claimed in claim 1, wherein: The magnet rod base (1) is internally provided with a third fixed cavity (13), the two ends of the third fixed cavity (13) are in communication with the first fixed cavity (11) and the second fixed cavity (12) respectively, and the permanent magnet (6) is arranged in the third fixed cavity (13).

3. A magnetic bar assembly as claimed in claim 2, wherein: The first magnet rod (2) is provided with a first limiting plate (21), the second magnet rod (3) is provided with a second limiting plate (31), and the first limiting plate (21) and the second limiting plate (31) are in abutment with the top of the permanent magnet (6).

4. A magnetic bar assembly as claimed in claim 1, wherein: The first coil (4) is spirally wound on the outer periphery of the first magnet rod (2) from bottom to top, the second coil (5) is spirally wound on the outer periphery of the second magnet rod (3) from top to bottom, the leading end of the first coil (4) is connected with the positive pole of the power supply circuit, the tail end of the second coil (5) is connected with the negative pole of the power supply circuit, and the tail end of the first coil (4) is connected with the leading end of the second coil (5).

5. A magnetic bar assembly as defined in claim 1, wherein: The tail end of the second coil (5) extends to the side where the leading end of the first coil (4) is located, so that the tail end of the second coil (5) and the leading end of the first coil (4) are wired on the same side.

6. A magnetic bar assembly as claimed in claim 5, wherein: One side of the magnet rod base (1) is provided with a wiring groove (14), and the wiring groove (14) is used for wiring of the leading end of the first coil (4) and the tail end of the second coil (5).

7. A magnetic bar assembly as claimed in claim 6, wherein: The magnet rod assembly further comprises an isolation sheet (7) arranged between the first magnet rod (2) and the second magnet rod (3), and the isolation sheet (7) isolates the first magnet rod (2) from the second magnet rod (3).

8. A magnetic bar assembly as defined in claim 1, wherein: The top of the first magnet rod (2) is provided with a first contact surface (241), the top of the second magnet rod (3) is provided with a second contact surface (32), and the first contact surface (241) and the second contact surface (32) are on the same horizontal plane.

9. A magnetic bar assembly as defined in claim 1, wherein: ​ 10. A magnetic bar assembly as claimed in claim 9, wherein: The first magnetic bar (2) includes a main body portion (22) extending in a vertical direction, an inclined portion (23) provided at the top of the main body portion (22), and an extension portion (24) provided at the top of the inclined portion (23), the inclined portion (23) being inclined toward the second magnetic bar (3), the extension portion (24) extending in the vertical direction, and the first contact surface (241) being provided at the top of the extension portion (24).

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