Bipolar magnetic bar structure of needle selector

Abstract

The utility model relates to a bipolar magnetic bar structure of a needle selector. Relates to the technical field of needle selectors. The device specifically comprises a first magnetic bar and a second magnetic bar which are arranged at an interval, a first coil arranged on the first magnetic bar, and a second coil arranged on the second magnetic bar, the first magnetic bar is magnetized to form an N pole, the second magnetic bar is magnetized to form an S pole, the electrified first coil demagnetizes the first magnetic bar, and the electrified second coil demagnetizes the second magnetic bar. The first magnetic bar is magnetized to form an N pole, the second magnetic bar is magnetized to form an S pole, and when the first magnetic bar and the second magnetic bar adsorb corresponding spring needles at the same time, the spring needles conduct the first magnetic bar with the N pole and the second magnetic bar with the S pole, so that magnetic induction lines outside the first magnetic bar and the second magnetic bar are spread in the spring needles; therefore, the magnetic field interference with the surrounding magnetic bars can be reduced, the energy loss of magnetic induction lines can be reduced, the accuracy of needle selection 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 bipolar magnetic rod structure of needle selector. 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, other color of sweater needs to stop operation, thus needs to stop selecting and stopping various color of sweater 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, to realize the re-arrangement of sweater color, and various color of sweater is formed by the frequent operation of needle selector.

[0003] Currently, the needle selector of flat knitting machine is mostly 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 number of magnetic rods corresponding to the spring needles of the flat knitting machine. By magnetizing or demagnetizing the corresponding magnetic rods, the corresponding spring needles are attracted or released, so as to achieve the purpose of needle selection.

[0004] In the prior art, the number of magnetic rods of the needle selector used for single spring needle is also single, and the magnetic pole is single. The magnetic field is disturbed, and the magnetic field interferes with each other. When the magnetic rod attracts or releases the corresponding spring needle, it is easy to generate a large magnetic force on the surrounding magnetic rod and spring needle, which may cause needle selection error, and further cause weaving error, thereby affecting production efficiency. UTILITY MODEL CONTENTS

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

[0006] The utility model provides a bipolar magnetic rod structure of needle selector, which comprises a first magnetic rod and a second magnetic rod arranged at intervals, a first coil arranged on the first magnetic rod, and a second coil arranged on the second magnetic rod. The first magnetic rod is magnetized to have an N pole, and the second magnetic rod is magnetized to have an S pole. The current directions of the first coil and the second coil are opposite. The first coil is electrified to demagnetize the first magnetic rod, and the second coil is electrified to demagnetize the second magnetic rod.

[0007] Further, the magnetic rod structure further comprises a permanent magnet arranged between the first magnetic rod and the second magnetic rod. The first magnetic rod contacts the N pole of the permanent magnet, is magnetized by the permanent magnet to have an N pole, and the second magnetic rod contacts the S pole of the permanent magnet, is magnetized by the permanent magnet to have an S pole.

[0008] Further, the first magnetic bar extends in a vertical direction, a bottom of the first magnetic bar is in contact with the N-pole of the permanent magnet, and a top of the first magnetic bar is provided with a first contact surface in contact with the spring needle to adsorb the spring needle.

[0009] Further, the second magnetic bar extends in a vertical direction, a bottom of the second magnetic bar is in contact with the S-pole of the permanent magnet, and a top of the second magnetic bar is provided with a second contact surface in contact with the spring needle to adsorb the spring needle.

[0010] Further, the top of the first magnetic bar is in the same horizontal plane as the top of the second magnetic bar.

[0011] Further, the first coil is wound around the outer periphery of the first magnetic bar from bottom to top, and the second coil is wound around the outer periphery of the second magnetic bar from top to bottom.

[0012] Further, the first coil is wound around the outer periphery of the first magnetic bar from bottom to top, and the second coil is wound around the outer periphery of the second magnetic bar from top to bottom.

[0013] Further, the magnetic bar structure further comprises an isolation sheet arranged between the first magnetic bar and the second magnetic bar, and the isolation sheet is used to isolate the first magnetic bar from the second magnetic bar.

[0014] Further, the first magnetic bar comprises a main body portion and a bent portion, a bottom of the main body portion is in contact with the N-pole of the permanent magnet, the bent portion is bent towards the second magnetic bar at the top of the main body portion, and the first contact surface is arranged at the top of the bent portion.

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

[0016] The bipolar magnetic bar structure of the needle selector has the following beneficial effects:

[0017] (1) The first magnetic bar of the magnetic bar structure is magnetized to have an N-pole, and the second magnetic bar is magnetized to have an S-pole, when the first magnetic bar and the second magnetic bar simultaneously adsorb the corresponding spring needle, the spring needle connects the first magnetic bar with the N-pole and the second magnetic bar with the S-pole, the magnetic induction lines outside the first magnetic bar and the second magnetic bar are propagated in the spring needle, thereby reducing the magnetic field interference between the magnetic bars and the energy loss of the magnetic induction lines, and further ensuring the accuracy of needle selection and improving the production efficiency.

[0018] (2) the magnetic rod structure further comprises a first coil and a second coil, the first coil 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 of the needle selector is realized;

[0019] (3) the magnetic rod structure of the magnetic rod structure further comprises a permanent magnet, the first magnetic rod is in contact with the N pole of the permanent magnet, and the second magnetic rod is in contact with 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 by the spring needle, so that the magnetic induction lines outside the magnet are propagated in the spring needle, thereby reducing the magnetic field interference between the surrounding magnetic rods and the energy loss of the magnetic induction lines, and further ensuring the accuracy of needle selection and improving the production efficiency;

[0020] (4) the top of the first magnetic rod of the magnetic rod structure is provided with a first contact surface, and the top of the second magnetic rod is provided with a second contact surface; the first contact surface and the second contact surface are in contact with the spring needle at the same time, so that the spring needle connects the first contact surface and the second contact surface, and the magnetic induction lines propagated from the first contact surface to the second contact surface are propagated in the spring needle, thereby reducing the diffusion of the magnetic induction lines, reducing the mutual interference between the surrounding magnetic fields, reducing the energy loss of the magnetic induction lines, and enhancing the adsorption of the first magnetic rod and the second magnetic rod to the spring needle;

[0021] (5) the first contact surface and the second contact surface of the magnetic rod structure are arranged on the same horizontal plane, so that the first contact surface and the second contact surface are better in contact with the spring needle when the first magnetic rod and the second magnetic rod adsorb the spring needle, so that the spring needle better connects the first contact surface and the second contact surface, further reduces the diffusion of the magnetic induction lines, enhances the adsorption of the first magnetic rod and the second magnetic rod to the spring needle, and further ensures the accuracy of needle selection and improves the production efficiency;

[0022] (6) the magnetic rod structure further comprises an isolation sheet, which isolates the first magnetic rod and the second magnetic rod from the end away from the permanent magnet, prevents the end of the first magnetic rod and the second magnetic rod away from the permanent magnet from directly contacting, thereby preventing the magnetic induction lines outside the whole magnet formed by the permanent magnet, the first magnetic rod and the second magnetic rod from directly propagating from the end of the first magnetic rod away from the permanent magnet to the end of the second magnetic rod away from the permanent magnet, reducing the magnetic induction lines propagated from the spring needle, and further enhancing the adsorption of the first magnetic rod and the second magnetic rod to the spring needle;

[0023] (7) the first magnetic rod of the magnetic rod structure comprises a main body part and a bent part, the bent part is bent at the top of the main body part towards the direction of the second magnetic rod, which can reduce the distance between the first contact surface and the second contact surface, so that the first contact surface and the second contact surface better contact the spring needle, and on the other hand, the distance between the bent part and the second magnetic rod can be reduced, so that the thickness of the isolation sheet arranged between the bent part and the second magnetic rod is reduced, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate the embodiments of the present application and, together with the description, serve to explain the principles of the present application. In these drawings, similar reference numerals are used to represent similar elements.

[0025] Fig. 1 It is a front view of a bipolar magnetic rod structure of a needle selector according to an embodiment of the present application.

[0026] Fig. 2 It is a structural schematic view of a bipolar magnetic rod structure of a needle selector according to an embodiment of the present application.

[0027] Fig. 3 It is a structural schematic view of a first magnetic rod of a bipolar magnetic rod structure of a needle selector according to an embodiment of the present application.

[0028] In the figure: 1, first magnetic rod; 11, first contact surface; 12, main body part; 13, inclined part; 14, extension part; 2, second magnetic rod; 21, second contact surface; 3, first coil; 4, second coil; 5, permanent magnet; 6, isolation sheet. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the present application belong to the protection scope of the present application.

[0030] Please refer to Figs. 1-3 The bipolar magnetic rod structure of the needle selector according to the embodiments of the present application comprises a first magnetic rod 1 and a second magnetic rod 2 arranged at intervals, a first coil 3 arranged on the first magnetic rod 1, and a second coil 4 arranged on the second magnetic rod 2; the first magnetic rod 1 is magnetized to present N pole, the second magnetic rod 2 is magnetized to present S pole, the current direction of the first coil 3 and the second coil 4 is opposite, the first coil 3 is de-magnetized to the first magnetic rod 1, and the second coil 4 is de-magnetized to the second magnetic rod 2.

[0031] In the present application, the magnetic rod structure comprises a first magnetic rod 1 and a second magnetic rod 2, the first magnetic rod 1 and the second magnetic rod 2 are arranged at intervals, wherein the first magnetic rod 1 is magnetized to present N pole and the second magnetic rod 2 is magnetized to present S pole, so that the first magnetic rod 1 and the second magnetic rod 2 simultaneously adsorb the corresponding spring needle. Due to the direction of magnetic induction lines of the magnet, outside the magnet is from N pole to S pole, and inside the magnet is from S pole to N pole, and in the prior art, the needle selector magnetic rod for a single spring needle is of the same magnetic pole.

[0032] Therefore, outside the magnetic rod, the magnetic induction lines are propagated from N pole to S pole in the air, the loop of the magnetic induction lines propagated in the air is scattered, and the energy loss is large, so that the magnetic field of the magnetic rod is easily interfered with the surrounding magnetic rods, the adsorption force of the magnetic rod on the corresponding spring needle is reduced, and the selection needle error is likely to occur, which causes the knitting error and affects the production efficiency.

[0033] In the present application, the first magnetic rod 1 is magnetized to present N pole and the second magnetic rod 2 is magnetized to present S pole, and when the first magnetic rod 1 and the second magnetic rod 2 simultaneously adsorb the corresponding spring needle, the spring needle connects the first magnetic rod 1 of N pole and the second magnetic rod 2 of S pole.

[0034] In the present embodiment, the first magnetic rod 1, the second magnetic rod 2 and the spring needle are all made of soft magnetic material. Since the air is a non-magnetic medium, its magnetic resistance is much larger than that of the soft magnetic material, and similar to the electric current, the magnetic induction lines always take the path with the minimum magnetic resistance (the maximum magnetic permeability), so that most of the magnetic induction lines are propagated from N pole to S pole in the spring needle outside the first magnetic rod 1 and the second magnetic rod 2.

[0035] On the one hand, the loop of the magnetic induction lines propagated outside the first magnetic rod 1 and the second magnetic rod 2 can be prevented from being scattered, so that the magnetic field interference between the magnetic rods can be reduced; on the other hand, since the magnetic resistance of the spring needle is much smaller than that of the air, the energy loss of the magnetic induction lines propagated in the spring needle is small, so that the adsorption force of the first magnetic rod 1 and the second magnetic rod 2 on the corresponding spring needle can be enhanced, and the accuracy of the selection needle can be ensured and the production efficiency can be improved.

[0036] In the present application, the magnetic rod structure further comprises a first coil 3 and a second coil 4, the first coil 3 is arranged on the first magnetic rod 1 and the second coil 4 is arranged on the second magnetic rod 2. It is mentioned in the foregoing that the first magnetic rod 1 and the second magnetic rod 2 are made of soft magnetic material, so that after the first magnetic rod 1 and the second magnetic rod 2 are magnetized, the magnetic attraction force can be simultaneously generated on the corresponding spring needle, the spring needle is elastically deformed, and the spring needle is adsorbed on the first magnetic rod 1 and the second magnetic rod 2.

[0037] When the first coil 3 is powered, the magnetic field formed in the first coil 3 has a magnetic induction line direction opposite to that in the first magnetic bar 1, so the magnetic field formed in the first coil 3 and the magnetic field in the first magnetic bar 1 cancel each other out, thereby reducing the magnetic field intensity of the first magnetic bar 1 and achieving demagnetization of the first magnetic bar 1; when the second coil 4 is powered, the magnetic field formed in the second coil 4 has a magnetic induction line direction opposite to that in the second magnetic bar 2, so the magnetic field formed in the second coil 4 and the magnetic field in the second magnetic bar 2 cancel each other out, thereby reducing the magnetic field intensity of the second magnetic bar 2 and achieving demagnetization of the second magnetic bar 2.

[0038] When the magnetic attraction of the first magnetic bar 1 and the second magnetic bar 2 to the spring needle is less than the elastic force of the spring needle to restore its deformation, the first magnetic bar 1 and the second magnetic bar 2 release the absorbed spring needle, allowing the spring needle to restore its original shape. Therefore, in this application, the first magnetic bar 1 and the second magnetic bar 2 absorb or release the corresponding spring needle, so that the position of the corresponding spring needle changes, thereby achieving needle selection of the needle selector.

[0039] In one embodiment, initially, the first magnetic bar 1 and the second magnetic bar 2 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 1 and the second magnetic bar 2 absorb the corresponding spring needle, allowing the spring needle to move from the non-working position to the working position and perform knitting work; after the work is completed, the first coil 3 and the second coil 4 are powered, and the first magnetic bar 1 and the second magnetic bar 2 release the corresponding spring needle, allowing the spring needle to return to the non-working position and wait for the next knitting work.

[0040] In another embodiment, initially, the first magnetic bar 1 and the second magnetic bar 2 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 3 and the second coil 4 are powered, and the first magnetic bar 1 and the second magnetic bar 2 release the corresponding spring needle, allowing the spring needle to move from the non-working position to the working position and perform knitting work; after the work is completed, the first coil 3 and the second coil 4 are powered, and the first magnetic bar 1 and the second magnetic bar 2 release the corresponding spring needle, allowing the spring needle to return to the non-working position and wait for the next knitting work.

[0041] The needle selector of the application is suitable for glove machines, flat knitting machines, collar machines, and other flat knitting machines, i.e., the magnetic bar structure simultaneously absorbs or releases the corresponding spring needle of the glove machine, flat knitting machine, collar machine, and other flat knitting machines through the first magnetic bar 1 and the second magnetic bar 2, thereby achieving needle selection of the glove machine, flat knitting machine, collar machine, and other flat knitting machines.

[0042] Specifically, the magnetic rod structure further comprises a permanent magnet 5, which is arranged between the first magnetic rod 1 and the second magnetic rod 2, wherein the first magnetic rod 1 is in contact with the N-pole of the permanent magnet 5, and the first magnetic rod 1 is magnetized to have the N-pole by the permanent magnet 5; the second magnetic rod 2 is in contact with the S-pole of the permanent magnet 5, and the first magnetic rod 1 is magnetized to have the S-pole by the permanent magnet 5.

[0043] Therefore, after the first magnetic rod 1 and the second magnetic rod 2 are magnetized by the permanent magnet 5, the first magnetic rod 1 extends to the N-pole of the permanent magnet 5, and the second magnetic rod 2 extends to the S-pole of the permanent magnet 5, that is, the first magnetic rod 1, the permanent magnet 5 and the second magnetic rod 2 are regarded as a whole magnet, the first magnetic rod 1 is the N-pole of the magnet, and the second magnetic rod 2 is the S-pole of the magnet.

[0044] The magnetic induction line direction of the magnet is from the N-pole to the S-pole outside the magnet, that is, outside the magnet, the magnetic induction line is propagated from the end of the first magnetic rod 1 away from the permanent magnet 5 to the end of the second magnetic rod 2 away from the permanent magnet 5. When the first magnetic rod 1 and the second magnetic rod 2 are attracted to the spring needle, the spring needle connects the end of the first magnetic rod 1 away from the permanent magnet 5 to the end of the second magnetic rod 2 away from the permanent magnet 5, that is, the spring needle connects the N-pole to the S-pole of the whole magnet.

[0045] Since the magnetic resistance of the spring needle is much smaller than that of the air, the magnetic induction line outside the magnet preferentially selects the path with the smallest magnetic resistance, so most of the magnetic induction lines are propagated from the N-pole to the S-pole in the spring needle, thereby preventing the magnetic induction line loop outside the magnet from being scattered and reducing the mutual interference with the surrounding magnetic field, reducing the energy loss of the magnetic induction line, enhancing the attraction of the first magnetic rod 1 and the second magnetic rod 2 to the spring needle, and further ensuring the accuracy of needle selection and improving production efficiency.

[0046] In the embodiment, the first magnetic rod 1 and the second magnetic rod 2 both extend in the vertical direction, the bottom of the first magnetic rod 1 is in contact with the N-pole of the permanent magnet 5, so that the N-pole of the permanent magnet 5 is extended vertically upward after the first magnetic rod 1 is magnetized by the permanent magnet 5; the bottom of the second magnetic rod 2 is in contact with the S-pole of the permanent magnet 5, so that the S-pole of the permanent magnet 5 is extended vertically upward after the second magnetic rod 2 is magnetized by the permanent magnet 5.

[0047] The top of the first magnetic rod 1 is provided with a first contact surface 11, and the top of the second magnetic rod 2 is provided with a second contact surface 21. Outside the whole magnet formed by the permanent magnet 5, the first magnetic rod 1 and the second magnetic rod 2, the magnetic induction line is propagated from the first contact surface 11 to the second contact surface 21 in the air.

[0048] When the first magnetic rod 1 and the second magnetic rod 2 adsorb the spring needle, the first contact surface 11 and the second contact surface 21 are in contact with the spring needle at the same time, so that the first contact surface 11 and the second contact surface 21 are conducted through the spring needle, the magnetic induction lines transmitted from the first contact surface 11 to the second contact surface 21 in the spring needle, thereby reducing the dispersion of the magnetic induction lines, reducing the mutual interference with the surrounding magnetic field, reducing the energy loss of the magnetic induction lines, and enhancing the adsorption force of the first magnetic rod 1 and the second magnetic rod 2 on the spring needle.

[0049] Further, in the embodiment, the top of the first magnetic rod 1 and the top of the second magnetic rod 2 are on the same horizontal plane, that is, the first contact surface 11 and the second contact surface 21 are arranged on the same horizontal plane. In the previous embodiment, it is mentioned that when the first magnetic rod 1 and the second magnetic rod 2 adsorb the spring needle, the first contact surface 11 and the second contact surface 21 are in contact with the spring needle at the same time.

[0050] Therefore, in the present application, the first contact surface 11 and the second contact surface 21 are arranged on the same horizontal plane, so that the first contact surface 11 and the second contact surface 21 can better contact the spring needle when the first magnetic rod 1 and the second magnetic rod 2 adsorb the spring needle, so that the spring needle can better conduct the first contact surface 11 and the second contact surface 21, further reduce the dispersion of the magnetic induction lines, enhance the adsorption force of the first magnetic rod 1 and the second magnetic rod 2 on the spring needle, and further ensure the accuracy of needle selection and improve production efficiency.

[0051] In the previous embodiment, it is mentioned that the bottom of the first magnetic rod 1 is in contact with the N pole of the permanent magnet 5, so that the first magnetic rod 1 is magnetized to have an N pole, and the bottom of the second magnetic rod 2 is in contact with the S pole of the permanent magnet 5, so that the second magnetic rod 2 is magnetized to have an S pole. Outside the overall magnet formed by the permanent magnet 5, the first magnetic rod 1 and the second magnetic rod 2, the magnetic induction lines are transmitted from the first contact surface 11 at the top of the first magnetic rod 1 to the second contact surface 21 at the top of the second magnetic rod 2 in the air.

[0052] And inside the overall magnet formed by the permanent magnet 5, the first magnetic rod 1 and the second magnetic rod 2, the magnetic induction lines are transmitted from the second contact surface 21 at the top of the second magnetic rod 2 to the first contact surface 11 at the top of the first magnetic rod 1 after sequentially passing through the second magnetic rod 2, the permanent magnet 5 and the first magnetic rod 1, thereby forming a closed loop with the magnetic induction lines outside the overall magnet.

[0053] Therefore, in the present application, the magnetic induction lines inside the first magnetic rod 1 are transmitted from the bottom of the first magnetic rod 1 to the top of the first magnetic rod 1, and the magnetic induction lines inside the second magnetic rod 2 are transmitted from the top of the second magnetic rod 2 to the bottom of the second magnetic rod 2, that is, the magnetic induction lines in the first magnetic rod 1 are transmitted from bottom to top, and the magnetic induction lines in the second magnetic rod 2 are transmitted from top to bottom.

[0054] In the embodiment, the first coil 3 is wound around the outer periphery of the first magnetic bar 1 from bottom to top. When the first coil 3 is electrified, the magnetic field formed in the first coil 3 has a direction opposite to that of the magnetic field in the first magnetic bar 1, so that the magnetic field formed in the first coil 3 and the magnetic field in the first magnetic bar 1 cancel each other, the magnetic field intensity of the first magnetic bar 1 is reduced, and the demagnetization of the first magnetic bar 1 is realized.

[0055] The second coil 4 is wound around the outer periphery of the second magnetic bar 2 from top to bottom. When the second coil 4 is electrified, the magnetic field formed in the second coil 4 has a direction opposite to that of the magnetic field in the second magnetic bar 2, so that the magnetic field formed in the second coil 4 and the magnetic field in the second magnetic bar 2 cancel each other, the magnetic field intensity of the second magnetic bar 2 is reduced, and the demagnetization of the second magnetic bar 2 is realized.

[0056] Since the direction of the magnetic field formed in the coil is related to the winding direction of the current in the coil, in actual implementation, it is worth noting that when the first coil 3 is wound around the outer periphery of the first magnetic bar 1 from bottom to top and the second coil 4 is wound around the outer periphery of the second magnetic bar 2 from top to bottom, the direction of the current in the first coil 3 and the second coil 4 should be designed according to the right-hand screw rule, so that the direction of the magnetic field formed in the first coil 3 and the second coil 4 is the above-mentioned direction.

[0057] In actual implementation, the first coil 3 and the second coil 4 can be electrified by the same power supply device, or can be electrified by two power supply devices respectively. In order to make the structure of the needle selector more compact and reduce the production cost, in the application, the first coil 3 and the second coil 4 are electrified by the same power supply device.

[0058] Specifically, in the embodiment, when the first coil 3 and the second coil 4 are manufactured, the same enameled wire can be wound around the outer periphery of the first magnetic bar 1 from bottom to top and then wound around the outer periphery of the second magnetic bar 2 from top to bottom, so that the first coil 3 is formed around the outer periphery of the first magnetic bar 1 and the second coil 4 is formed around the outer periphery of the second magnetic bar 2.

[0059] Then, the first end of the enameled wire is connected to the positive pole of the power supply circuit, and the tail end of the enameled wire is connected to the negative pole of the power supply circuit, that is, the first end of the first coil 3 is connected to the positive pole of the circuit, the tail end is connected to the first end of the second coil 4, and the tail end of the second coil 4 is connected to the negative pole of the circuit, so as to form a closed loop, realize the electrification of the first coil 3 and the second coil 4 by the same power supply device, and further make the structure of the needle selector more compact and reduce the production cost.

[0060] In the embodiment, the magnetic rod structure further comprises a separation sheet 6, which is arranged between the first magnetic rod 1 and the second magnetic rod 2. Specifically, the separation sheet 6 is arranged at the end of the first magnetic rod 1 and the second magnetic rod 2 away from the permanent magnet 5, so as to isolate the end of the first magnetic rod 1 and the second magnetic rod 2 away from the permanent magnet 5 by the separation sheet 6. It is predictable that in the actual implementation, the separation sheet 6 can be made of non-magnetic material, such as copper, aluminum, stainless steel, etc., so that the separation sheet 6 can isolate the first magnetic rod 1 and the second magnetic rod 2.

[0061] In the application, the reason why the end of the first magnetic rod 1 and the second magnetic rod 2 away from the permanent magnet 5 is isolated by the separation sheet 6 is to prevent the end of the first magnetic rod 1 and the second magnetic rod 2 away from the permanent magnet 5 from directly contacting, so as to prevent the magnetic induction lines from the end of the first magnetic rod 1 away from the permanent magnet 5 directly propagating to the end of the second magnetic rod 2 away from the permanent magnet 5 outside the overall magnet formed by the permanent magnet 5, the first magnetic rod 1 and the second magnetic rod 2, reducing the magnetic induction lines propagating from the spring needle, and further enhancing the adsorption force of the first magnetic rod 1 and the second magnetic rod 2 to the spring needle.

[0062] In the embodiment, the first magnetic rod 1 comprises a main body part 12 and a bent part. Since the main body part 12 and the bent part are an integral structure, the first magnetic rod 1 as a whole is magnetized to be N-pole by contacting the bottom of the main body part 12 with the N-pole of the permanent magnet 5. The bent part is arranged at the top of the main body part 12, and the first contact surface 11 is arranged at the top of the bent part. When the first magnetic rod 1 adsorbs the corresponding spring needle, the first contact surface 11 at the top of the bent part contacts the spring needle, so as to conduct the first contact surface 11 at the top of the bent part and the second contact surface 21 at the top of the second magnetic rod 2 through the spring needle.

[0063] In the application, since the bent part is arranged at the top of the main body part 12 and is bent towards the second magnetic rod 2, on the one hand, the bent part can reduce the distance between the first contact surface 11 and the second contact surface 21, so that the first contact surface 11 and the second contact surface 21 can better contact the spring needle when the first magnetic rod 1 and the second magnetic rod 2 adsorb the spring needle, and further make the spring needle better conduct the first contact surface 11 and the second contact surface 21.

[0064] On the other hand, the bent part can reduce the distance between the bent part and the second magnetic rod 2, so that when the separation sheet 6 is arranged between the bent part and the second magnetic rod 2, the separation sheet 6 with smaller thickness can be used to isolate the first magnetic rod 1 and the second magnetic rod 2, and further reduce the production cost.

[0065] Further, in the embodiment, the main body 12 extends in the vertical direction, the bending part includes the inclined part 13 and the extending part 14, the inclined part 13 is arranged at the top of the main body 12, and the inclined part 13 is inclined towards the direction of the second magnetic bar 2 at the top of the main body 12. The extending part 14 is arranged at the top of the inclined part 13, and the first contact surface 11 is arranged at the top of the extending part 14, so that the first contact surface 11 is in the same horizontal plane with the second contact surface 21 by extending vertically upward of the extending part 14 at the top of the inclined part 13, so that the first contact surface 11 and the second contact surface 21 are better in contact with the spring needle.

[0066] Therefore, by inclining the inclined part 13 towards the direction of the second magnetic bar 2 at the top of the main body 12, the distance between the first contact surface 11 and the second contact surface 21 is reduced, the first contact surface 11 and the second contact surface 21 are better in contact with the spring needle, and the distance between the extending part 14 and the second magnetic bar 2 is reduced, so that when the isolation sheet 6 is arranged between the bending part and the second magnetic bar 2, the isolation sheet 6 with smaller thickness can be used to isolate the first magnetic bar 1 from the second magnetic bar 2, thereby reducing the production cost.

[0067] The above-described content can be implemented alone or in various combinations, and these variants are within the protection scope of the present application.

[0068] It should be noted that, in this document, the relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit it. 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 modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; 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 application.

Claims

1. A bipolar magnetic bar structure of a needle selector, characterized by: The magnetic rod structure comprises a first magnetic rod (1) and a second magnetic rod (2) arranged at intervals, a first coil (3) arranged on the first magnetic rod (1), and a second coil (4) arranged on the second magnetic rod (2); the first magnetic rod (1) is magnetized to have a N pole, the second magnetic rod (2) is magnetized to have a S pole, the current directions of the first coil (3) and the second coil (4) are opposite, the first coil (3) is de-magnetized when electrified, and the second coil (4) is de-magnetized when electrified.

2. A dual pole magnetic bar structure for a needle selector as claimed in claim 1, characterized in that: The magnetic rod structure further comprises a permanent magnet (5) arranged between the first magnetic rod (1) and the second magnetic rod (2), the first magnetic rod (1) is in contact with the N pole of the permanent magnet (5) and is magnetized to have a N pole, and the second magnetic rod (2) is in contact with the S pole of the permanent magnet (5) and is magnetized to have a S pole.

3. A dual pole magnetic bar structure for a needle selector as claimed in claim 2, characterized in that: The first magnetic rod (1) extends in the vertical direction, the bottom of the first magnetic rod (1) is in contact with the N pole of the permanent magnet (5), and the top of the first magnetic rod (1) is provided with a first contact surface (11) for contacting and adsorbing the spring needle.

4. A bipolar magnetic bar structure for a needle selector as claimed in claim 2 or 3, characterized in that: The second magnetic rod (2) extends in the vertical direction, the bottom of the second magnetic rod (2) is in contact with the S pole of the permanent magnet (5), and the top of the second magnetic rod (2) is provided with a second contact surface (21) for contacting and adsorbing the spring needle.

5. A dual pole magnetic bar structure for a needle selector as defined in claim 2, characterized in that: The top of the first magnetic rod (1) is on the same horizontal plane as the top of the second magnetic rod (2).

6. A dual pole magnetic bar structure for a needle selector as defined in claim 1, characterized in that: The first coil (3) is wound around the outer periphery of the first magnetic rod (1) from bottom to top, and the second coil (4) is wound around the outer periphery of the second magnetic rod (2) from top to bottom.

7. A dual pole magnetic bar structure for a needle selector as defined in claim 6, characterized in that: The first end of the first coil (3) is connected to the positive pole of the circuit, the tail end of the first coil (3) is connected to the first end of the second coil (4), and the tail end of the second coil (4) is connected to the negative pole of the circuit.

8. A dual pole magnetic bar structure for a needle selector as defined in claim 3, characterized in that: The magnetic rod structure further comprises an isolation sheet (6) arranged between the first magnetic rod (1) and the second magnetic rod (2), and the isolation sheet (6) is used to isolate the first magnetic rod (1) from the second magnetic rod (2).

9. A dual pole magnetic bar structure for a needle selector as claimed in claim 8, characterized in that: The first magnetic rod (1) comprises a main body portion (12) and a bent portion, the bottom of the main body portion (12) is in contact with the N pole of the permanent magnet (5), the bent portion is bent towards the second magnetic rod (2) at the top of the main body portion (12), the first contact surface (11) is arranged at the top of the bent portion, and the isolation sheet (6) is arranged between the bent portion and the second magnetic rod (2).

10. A dual pole magnetic bar structure for a needle selector as defined in claim 9, characterized in that: The main body portion (12) extends in the vertical direction, the bent portion comprises an inclined portion (13) inclined towards the second magnetic rod (2) at the top of the main body portion (12), and an extension portion (14) extending vertically upwards at the top of the inclined portion (13), the first contact surface (11) is arranged at the top of the extension portion (14), and the isolation sheet (6) is arranged between the extension portion (14) and the second magnetic rod (2).

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