Magnetic latching magnetic circuit structure and relay

Abstract

The invention discloses a magnetic latching magnetic circuit structure and a relay. The magnetic latching magnetic circuit structure comprises a yoke, a magnetic assembly and a coil assembly. A magnetic circuit space is defined by the yoke; the magnetic assembly is arranged in the magnetic circuit space and comprises two permanent magnets which are arranged at intervals in the first direction and a movable magnetizer which is movably arranged between the two permanent magnets; the two permanent magnets are fixedly arranged relative to the yoke, and the polarities of the surfaces, facing the movable magnetizer, of the two permanent magnets are the same; the coil assembly is fixedly arranged on the periphery of the movable magnetizer in a sleeving mode, and the coil assembly is configured to respond to an input signal to drive the movable magnetizer to move between the two permanent magnets.

Description

Technical Field

[0001] The present application relates to the technical field of electric control devices, and in particular to a magnetic holding magnetic circuit structure and a relay. Background Art

[0002] As a control component, a relay is a driving device that controls a large current with a small current. It is widely used in aerospace, automobile, home appliance, industrial control and other fields. In recent years, the Internet has developed rapidly, and the Internet data center is the key to supporting Internet services. In its power supply circuit, a magnetic latching relay is usually used as a power supply switching control. In order to ensure that when the main power fails, the relay can quickly respond to switch to the backup power supply after receiving the control signal to achieve power supply and reduce failure losses. Therefore, the switching time of the relay must be short enough, and in order to complete the fast switching, the magnetic circuit action mechanism must have a fast action speed under a large stroke. However, the switching action of the relay in the related art is not timely enough, which is easy to cause power supply failure. Summary of the invention

[0003] The embodiments of the present application provide a magnetic latching magnetic circuit structure and a relay to solve the problem of untimely switching action existing in the related art.

[0004] The magnetic holding magnetic circuit structure of the embodiment of the present application includes:

[0005] The yoke iron encloses a magnetic circuit space;

[0006] A magnetic assembly is disposed in the magnetic circuit space and includes two permanent magnets spaced apart in a first direction and a dynamic conductive magnet movably disposed between the two permanent magnets; the two permanent magnets are fixedly disposed relative to the yoke, and the polarities of the surfaces of the two permanent magnets facing the dynamic conductive magnet are the same; and

[0007] The coil assembly is fixedly mounted on the outer circumference of the moving magnet, and the coil assembly is configured to drive the moving magnet to move between the two permanent magnets in response to an input signal.

[0008] According to some embodiments of the present application, the side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively;

[0009] In the corresponding moving pole surface and the first magnetic pole surface, the orthographic projection of the first magnetic pole surface on a target plane is a first projection, the orthographic projection of the moving pole surface on the target plane is a second projection, and the second projection coincides with the first projection or the second projection falls within the first projection;

[0010] Wherein, the target plane is perpendicular to the first direction.

[0011] According to some embodiments of the present application, the side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively;

[0012] When the magnetic holding magnetic circuit structure is in a holding state, one of the moving pole faces is in contact with only one of the first magnetic pole faces, and the other moving pole face is separated from the other first magnetic pole face.

[0013] According to some embodiments of the present application, the side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; there is a magnetic gap between the corresponding moving pole surfaces and the first magnetic pole surfaces; the coil assembly encloses an electromagnetic action space, and the two magnetic gaps are located in the electromagnetic action space.

[0014] According to some embodiments of the present application, the coil assembly includes two coil units, the electromagnetic action space has two subspaces, and one coil unit encloses one subspace;

[0015] The two magnetic gaps are located in the two subspaces respectively.

[0016] According to some embodiments of the present application, the coil unit includes a coil frame and a coil, the coil frame is fixedly sleeved on the outer circumference of the moving magnet, and the coil is wound around the outer circumference of the coil frame.

[0017] According to some embodiments of the present application, the moving magnet is movable between a first position and a second position;

[0018] The two permanent magnets are respectively defined as the first permanent magnet and the second permanent magnet, and the two subspaces are respectively defined as the first subspace and the second subspace; when the moving magnet is located at the first position, the moving magnet is in contact with the first permanent magnet, and the moving magnet is separated from the second permanent magnet, at least part of the first permanent magnet is located in the first subspace, and the entire second permanent magnet is located outside the second subspace; when the moving magnet is located at the second position, the moving magnet is in contact with the second permanent magnet, and the moving magnet is separated from the first permanent magnet, at least part of the second permanent magnet is located in the second subspace, and the entire first permanent magnet is located outside the first subspace.

[0019] According to some embodiments of the present application, the two permanent magnets are fixedly connected to the yoke.

[0020] According to some embodiments of the present application, the yoke includes a plurality of separate bodies, and the plurality of separate bodies are connected to enclose the magnetic circuit space.

[0021] According to some embodiments of the present application, the yoke includes two split bodies, one of which is a yoke plate, and the other is a U-shaped yoke, the U-shaped yoke includes a first plate and two second plates, the first plate and the yoke plate are arranged opposite to each other along the first direction, and the magnetic component is located between the first plate and the yoke plate, one end of the two second plates are respectively connected to the two ends of the first plate, and the other ends of the two second plates are respectively connected to the two ends of the yoke plate;

[0022] The two permanent magnets are respectively fixedly connected to the mutually facing surfaces of the first plate and the yoke iron plate.

[0023] According to some embodiments of the present application, the yoke includes three parts, two of which are yoke plates, and the other part is a yoke cylinder, the yoke cylinder has openings at both axial ends, and the two yoke plates are respectively connected to the axial ends of the yoke cylinder and cover the two openings of the yoke cylinder respectively;

[0024] Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of the two yoke iron plates facing each other.

[0025] According to some embodiments of the present application, the yoke includes two split bodies, each of which is an L-shaped yoke, and the two L-shaped yokes are sequentially connected end to end to form a rectangular frame;

[0026] Wherein, the two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

[0027] According to some embodiments of the present application, the yoke includes four parts, each of which is a yoke plate, and the four yoke plates are sequentially connected end to end to form a rectangular frame;

[0028] Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke iron plates.

[0029] According to some embodiments of the present application, the side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; the first magnetic pole surface and the moving pole surface are both perpendicular to the first direction.

[0030] According to some embodiments of the present application, the first projection and the second projection are circular, annular or polygonal.

[0031] The relay of the embodiment of the present application includes any of the magnetic latching magnetic circuit structures described above.

[0032] One embodiment of the above application has at least the following advantages or beneficial effects:

[0033] The magnetic holding magnetic circuit structure of the embodiment of the present application includes two permanent magnets, a moving magnet and a coil assembly, wherein the moving magnet is movably arranged between the two permanent magnets, and the coil assembly is fixedly sleeved on the outer periphery of the moving magnet. When the coil assembly is energized to drive the moving magnet to move, the moving magnet is simultaneously subjected to suction and Lorentz force, and under the combined action of suction and Lorentz force, the switching speed of the moving magnet is significantly improved, thereby shortening the switching time of the moving magnet.

[0034] Furthermore, the magnetic holding magnetic circuit structure uses the surface of the permanent magnet as the pole surface. When the magnetic circuit structure is in the holding state, the moving magnetizer only contacts one of the permanent magnets but not other parts made of magnetic conductive materials. The permanent magnet provides sufficient suction force to ensure the anti-vibration performance and reliability of the magnetic circuit structure. When the coil assembly is energized, since the moving magnetizer only contacts the permanent magnet but not other parts made of magnetic conductive materials, the magnetic field of other parts will not be offset by the magnetic field generated by the energization of the coil assembly, and then the magnetic field of other parts will not be immediately converted into a reverse magnetic field. In addition, the problem of the holding suction force becoming zero and then immediately rising will not occur, which significantly improves the switching speed of the moving magnetizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0036] Figure 1 It is a three-dimensional schematic diagram of the magnetic retaining magnetic circuit structure of the first embodiment of the present application.

[0037] Figure 2 yes Figure 1 Schematic diagram of direction A in .

[0038] Figure 3 It is a schematic diagram of the decomposition of the magnetic holding magnetic circuit structure.

[0039] Figure 4 is along Figure 2 Sectional view after cutting along the BB cutting line.

[0040] Figure 5 It is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure of an embodiment of the present application.

[0041] Figure 6 It is a schematic diagram of the permanent magnet, the moving magnet and the coil unit in the magnetic retaining magnetic circuit structure of the second embodiment of the present application.

[0042] Figure 7 It is a schematic diagram of the permanent magnet, the moving magnet and the coil unit in the magnetic retaining magnetic circuit structure of the third embodiment of the present application.

[0043] Figure 8 It is a schematic diagram of an exploded view of a yoke according to another embodiment of the present application.

[0044] Fig. 9 It is a schematic diagram of an exploded view of a yoke according to another embodiment of the present application.

[0045] Fig.10 It is a schematic diagram of an exploded view of a yoke according to yet another embodiment of the present application.

[0046] Fig.11 It is a schematic top view of the relay according to an embodiment of the present application.

[0047] Fig.12 is along Fig.11 Sectional view after cutting along the CC cutting line.

[0048] The reference numerals are described as follows:

[0049] 10. Magnetic holding magnetic circuit structure

[0050] 20. Driving parts

[0051] 30. Moving parts

[0052] 40. Contact components

[0053] 100. Yoke

[0054] 100a, split

[0055] 101. Magnetic Circuit Space

[0056] 110. Yoke iron plate

[0057] 120. U-shaped yoke

[0058] 121. First Board

[0059] 122. Second Board

[0060] 130. Yoke iron cylinder

[0061] 140. L-shaped yoke

[0062] 141. Paragraph 1

[0063] 142. Second paragraph

[0064] 200. Magnetic components

[0065] 210.Permanent magnet

[0066] 210a, first permanent magnet

[0067] 210b, second permanent magnet

[0068] 211. First magnetic pole surface

[0069] 212. Second magnetic pole surface

[0070] 220. Moving magnet

[0071] 221. Moving Pole Surface

[0072] 230. Magnetic Gap

[0073] 300. Coil assembly

[0074] 310. Electromagnetic Interaction Space

[0075] 311. Subspace

[0076] 311a, First Subspace

[0077] 311b, Second Subspace

[0078] 320, coil unit

[0079] 320a, first coil unit

[0080] 320b, second coil unit

[0081] 321. Coil frame

[0082] 322. Coil

[0083] D1, first direction DETAILED DESCRIPTION

[0084] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0085] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0086] like Figures 1 to 4 As shown, the magnetic retaining magnetic circuit structure 10 of the embodiment of the present application includes a yoke 100, a magnetic assembly 200 and a coil assembly 300. The yoke 100 encloses a magnetic circuit space 101; the magnetic assembly 200 is arranged in the magnetic circuit space 101, and includes two permanent magnets 210 spaced apart along a first direction D1 and a moving magnet 220 movably arranged between the two permanent magnets 210; the two permanent magnets 21 are fixedly arranged relative to the yoke 100, and the polarities of the surfaces of the two permanent magnets 210 facing the moving magnet 220 are the same; the coil assembly 300 is fixedly sleeved on the outer periphery of the moving magnet 220, and the coil assembly 300 is configured to drive the moving magnet 220 to move between the two permanent magnets 210 in response to an input signal.

[0087] The permanent magnet 210 is a material that can spontaneously generate a magnetic field and maintain magnetism for a long time without relying on external current.

[0088] The dynamic magnetizer 220 is made of magnetic conductive materials, including but not limited to iron, silicon steel, soft magnetic alloy, etc.

[0089] The magnetic holding magnetic circuit structure 10 includes a holding state and an excitation state. When the magnetic holding magnetic circuit structure 10 is in the holding state, the moving magnet 220 is in contact with one of the permanent magnets 210 and is separated from the other permanent magnet 210; when the magnetic holding magnetic circuit structure 10 is in the excitation state, a current is passed through the coil assembly 300, and the coil assembly 300 is configured to drive the moving magnet 220 to move from one of the permanent magnets 210 to the other permanent magnet 210 in response to an input signal.

[0090] In one embodiment, the moving magnet 220 is movable between a first position and a second position. When the moving magnet 220 is located at one of the first position and the second position, the moving magnet 220 is in contact with one of the permanent magnets 210 and is separated from the other permanent magnet 210 .

[0091] For the convenience of explanation, the two permanent magnets 210 are defined as a first permanent magnet 210a and a second permanent magnet 210b. When the moving magnet 220 is located at the first position, the moving magnet 220 is in contact with the first permanent magnet 210a and is separated from the second permanent magnet 210b; when the moving magnet 220 is located at the second position, the moving magnet 220 is in contact with the second permanent magnet 210b and is separated from the first permanent magnet 210a.

[0092] In one embodiment, the side of the moving magnet 220 facing the permanent magnet 210 has a moving pole surface 221, and the side of the permanent magnet 210 facing the moving magnet 220 has a first magnetic pole surface 211, and the two moving pole surfaces 221 correspond to the two first magnetic pole surfaces 211. The polarities of the first magnetic pole surfaces 211 of the two permanent magnets 210 are the same.

[0093] In the embodiment of the present application, the first pole surface 211 of the first permanent magnet 210a is arranged face to face with the moving pole surface 221 of the moving magnet 220 at one end along the first direction D1, and the first pole surface 211 of the second permanent magnet 210b is arranged face to face with the moving pole surface 221 of the moving magnet 220 at the other end along the first direction D1.

[0094] Among them, when the moving magnet 220 is in the first position, one of the moving pole surfaces 221 is in contact with the first magnetic pole surface 211 of the first permanent magnet 210a, and the other moving pole surface 221 is separated from the first magnetic pole surface 211 of the second permanent magnet 210b; when the moving magnet 220 is in the second position, the other moving pole surface 221 is in contact with the first magnetic pole surface 211 of the second permanent magnet 210b, and one of the moving pole surfaces 221 is separated from the first magnetic pole surface 211 of the first permanent magnet 210a.

[0095] like Figure 3 and Figure 4 As shown, each permanent magnet 210 further has a second magnetic pole surface 212 , and the first magnetic pole surface 211 and the second magnetic pole surface 212 of each permanent magnet 210 are disposed opposite to each other along the first direction D1 and have opposite polarities.

[0096] In one embodiment, the coil assembly 300 encloses an electromagnetic action space 310 , a magnetic gap 230 is formed between the corresponding moving pole surface 221 and the first magnetic pole surface 211 , and both magnetic gaps 320 are located in the electromagnetic action space 310 .

[0097] Of course, in other embodiments, the two magnetic gaps 320 may also be located outside the electromagnetic action space 310 .

[0098] In one embodiment, the coil assembly 300 includes two coil units 320 , the electromagnetic action space 310 has two subspaces 311 , and one coil unit 320 encloses one subspace 311 ; the two magnetic gaps 230 are respectively located in the two subspaces 311 .

[0099] In the embodiment of the present application, the two coil units 320 are respectively and correspondingly surrounded by the outer circumferences of the two magnetic gaps 230 , so that the length of each coil unit 320 along the first direction D1 does not need to be designed to be too long, thereby saving material costs.

[0100] Of course, in other embodiments, the length of the coil assembly 300 along the first direction D1 may be designed to be longer so as to surround the entire dynamic conductive magnet 220 and the two magnetic gaps 230 .

[0101] The two coil units 320 are respectively defined as a first coil unit 320a and a second coil unit 320b, and the two subspaces 311 are respectively defined as a first subspace 311a and a second subspace 311b. The first coil unit 320a encloses the first subspace 311a, and the second coil unit 320b encloses the second subspace 311b.

[0102] Each coil unit 320 includes a coil frame 321 and a coil 322 . The coil frame 321 is fixedly sleeved on the outer circumference of the dynamic magnet 220 , and the coil 322 is wound around the outer circumference of the coil frame 321 .

[0103] As an example, the connection method between the coil frame 321 and the dynamic conductive magnet 220 can be interference fit, welding, adhesive bonding, etc., which is not limited in the present application.

[0104] like Figure 5 As shown, when the moving magnet 220 is located at the position shown in the figure (first position), and the coil assembly 300 is not powered off, the distance between the moving magnet 220 and the first permanent magnet 210a is relatively close, and the first permanent magnet 210a and the moving magnet 220 are attracted to each other, and the first permanent magnet 210a can provide a strong holding force to the moving magnet 220 and the coil assembly 300. At the same time, the distance between the moving magnet 220 and the second permanent magnet 210b is relatively far, so the suction force generated between the second permanent magnet 210b and the moving magnet 220 is very small. Therefore, the moving magnet 220 can be maintained in the first position.

[0105] When the two coil units 320 are powered on and the power-on directions are the same, the direction of the magnetic field generated by the first coil unit 320a after power-on is opposite to the direction of the magnetic field generated by the first permanent magnet 210a, so that the magnetic field generated by the first coil unit 320a can weaken the magnetic field generated by the first permanent magnet 210a, thereby reducing the suction force of the first permanent magnet 210a on the moving magnet 220. The direction of the magnetic field generated by the second coil unit 320b after power-on is the same as the direction of the magnetic field generated by the second permanent magnet 210b, and the two magnetic fields are superimposed, which increases the suction force of the second permanent magnet 210b on the moving magnet 220. Through such a design, the suction force on the moving magnet 220 is "increased and decreased", which improves the switching speed of the moving magnet 220.

[0106] At the same time, when the first coil unit 320a is powered on, the first coil unit 320a will be subjected to the first Lorentz force applied by the first permanent magnet 210a. According to the left-hand rule, the direction of the first Lorentz force is to drive the dynamic conductive magnet 220 and the first coil unit 320a to move in the direction close to the second permanent magnet 210b along the first direction D1, that is, the direction of the first Lorentz force is consistent with the direction in which the dynamic conductive magnet 220 is subjected to the suction force of the second permanent magnet 210b. At the same time, when the second coil unit 320b is powered on, the second coil unit 320b will also be subjected to the second Lorentz force applied by the second permanent magnet 210b. According to the left-hand rule, the direction of the second Lorentz force is opposite to the direction in which the dynamic conductive magnet 220 is subjected to the suction force of the second permanent magnet 210b. Since the magnetic field strength of the second permanent magnet 210b acting on the second coil unit 320b is much weaker than the magnetic field strength of the first permanent magnet 210a acting on the first coil unit 320a, the first Lorentz force is greater than the second Lorentz force, and the driving force on the dynamic magnet 220 and the coil assembly 300 is still increased.

[0107] Therefore, the magnetic holding magnetic circuit structure 10 of the embodiment of the present application includes two permanent magnets 210, a moving magnet 220 and a coil assembly 300. The moving magnet 220 is movably disposed between the two permanent magnets 210, and the coil assembly 300 is fixedly sleeved on the outer periphery of the moving magnet 220. When the coil assembly 300 is energized to drive the moving magnet 220 to move, the moving magnet 220 is simultaneously subjected to suction and Lorentz force. Under the combined action of suction and Lorentz force, the switching speed of the moving magnet 220 is significantly improved, thereby shortening the switching time of the moving magnet 220.

[0108] like Figure 4 and Figure 5 As shown, when the moving magnet 220 is located in the first position, the moving magnet 220 is in contact with the first permanent magnet 210a, and the moving magnet 220 is separated from the second permanent magnet 210b. At this time, at least a portion of the first permanent magnet 210a is located in the first subspace 311a, and the entire second permanent magnet 210b is located outside the second subspace 311b; when the moving magnet 220 is located in the second position, the moving magnet 220 is in contact with the second permanent magnet 210b, and the moving magnet 220 is separated from the first permanent magnet 210a. At this time, at least a portion of the second permanent magnet 210b is located in the second subspace 311b, and the entire first permanent magnet 210a is located outside the first subspace 311a.

[0109] In the embodiment of the present application, when the moving magnet 220 is in the first position, at least a portion of the first permanent magnet 210a is located in the first subspace 311a, and the entire second permanent magnet 210b is located outside the second subspace 311b. In this way, the magnetic field strength of the first permanent magnet 210a applied to the first coil unit 320a is significantly weaker than the magnetic field strength of the second permanent magnet 210b applied to the second coil unit 320b, thereby making the Lorentz force applied to the first coil unit 320a by the first permanent magnet 210a greater than the Lorentz force applied to the second coil unit 320b by the second permanent magnet 210b, and ultimately increasing the driving force applied to the moving magnet 220 as a whole when switching.

[0110] Similarly, when the moving magnet 220 is in the second position, at least part of the second permanent magnet 210b is located in the second subspace 311b, and the first permanent magnet 210a is entirely located outside the first subspace 311a. When the moving magnet 220 switches from the second position to the first position, the driving force on the moving magnet 220 as a whole also increases.

[0111] In one embodiment, when the magnetic holding magnetic circuit structure is in a holding state, one of the moving pole faces 221 is in contact with only one of the first magnetic pole faces 211, and the other moving pole face 221 is separated from the other first magnetic pole face 211. It should be noted that in the magnetic holding magnetic circuit structure in the prior art, one side surface of a component made of a high magnetic permeability material is usually used as a pole face. As the coil power increases, the magnetic field of the component made of the high magnetic permeability material is offset by the magnetic field generated by the coil and immediately turns into a reverse magnetic field, that is, the holding suction force becomes zero and then immediately increases, which is not conducive to the rapid switching of the magnetic circuit structure.

[0112] In the embodiment of the present application, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet as the pole surface. When the magnetic circuit structure is in the holding state, the dynamic magnet 220 only contacts one of the permanent magnets and does not contact other parts made of magnetic conductive materials. The permanent magnet provides sufficient suction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, since the dynamic magnet 220 is only in contact with the permanent magnet and does not contact other parts made of magnetic conductive materials, the magnetic field of other parts will not be offset by the magnetic field generated by the energization of the coil assembly 300, and then the magnetic field of other parts will not be immediately converted into a reverse magnetic field. Therefore, there will be no problem of the holding suction force becoming zero and then immediately rising, which significantly improves the switching speed of the dynamic magnet 220.

[0113] like Figure 3 and Figure 4 As shown, two permanent magnets 210 are fixedly connected to the yoke 100 .

[0114] Of course, in other embodiments, when the magnetic latching magnetic circuit structure 10 is installed in a relay, the two permanent magnets 210 may also be fixedly connected to other components of the relay to ensure that the two permanent magnets 210 are in contact with the yoke 100 .

[0115] like Figure 3 and Figure 4 As shown, the yoke 100 includes a plurality of split bodies 100 a , and the plurality of split bodies 100 a are sequentially connected end to end to form a magnetic circuit space 101 .

[0116] In the embodiment of the present application, the yoke 100 adopts a structure in which a plurality of split bodies 100a are connected end to end, which is convenient for processing and assembly.

[0117] In other embodiments, the yoke 100 may also be a completely closed annular structure.

[0118] In one embodiment, the yoke 100 includes two split bodies 100a, one of which is a yoke plate 110, and the other split body 100a is a U-shaped yoke 120, and the U-shaped yoke 120 includes a first plate 121 and two second plates 122, the first plate 121 and the yoke plate 110 are arranged opposite to each other in the first direction D1, and the magnetic component 200 is located between the first plate 121 and the yoke plate 110, one end of the two second plates 122 is respectively connected to the two ends of the first plate 121, and the other end of the two second plates 122 is respectively connected to the two ends of the yoke plate 110; wherein, the two permanent magnets 210 are respectively fixedly connected to the surfaces of the first plate 121 and the yoke plate 110 facing each other. In the embodiment of the present application, the first permanent magnet 210a is fixedly connected to the first plate 121, and the second permanent magnet 210b is fixedly connected to the yoke plate 110.

[0119] In one embodiment, the first magnetic pole surface 211 , the second magnetic pole surface 212 , and the moving pole surface 221 are all perpendicular to the first direction D1 .

[0120] Of course, in other embodiments, the first magnetic pole surface 211 , the second magnetic pole surface 212 , and the moving pole surface 221 may also be non-perpendicular to the first direction D1 .

[0121] In one embodiment, in the corresponding moving pole face 221 and the first magnetic pole face 211, the orthographic projection of the first magnetic pole face 211 on a target plane is the first projection, and the orthographic projection of the moving pole face 221 on the target plane is the second projection, and the second projection coincides with the first projection or the second projection falls within the first projection; wherein the target plane is perpendicular to the first direction D1. In the embodiment of the present application, the second projection coincides with the first projection, or the second projection falls within the first projection, that is, the second projection does not exceed the first projection, which can further ensure that when in the holding state, the moving magnet 220 only contacts the permanent magnet 210 and does not contact other parts made of magnetic conductive materials.

[0122] Of course, in other embodiments, the first projection may also fall within the second projection. At this time, although part of the moving pole surface 221 of the moving magnet 220 exceeds the edge of the first magnetic pole surface 211, as long as a sufficiently large gap is reserved between other parts made of magnetic conductive materials and the moving pole surface 221, the influence of other parts made of magnetic conductive materials on the switching action of the moving magnet 220 can also be reduced.

[0123] In one embodiment, the first projection and the second projection are circular, that is, the dynamic conductive magnet 220 and the permanent magnet are both cylindrical.

[0124] like Figure 6 As shown, the first projection and the second projection are polygonal, that is, the dynamic conductive magnet 220 and the permanent magnet are prisms, such as triangular prisms, quadrangular prisms, and pentagonal prisms.

[0125] like Figure 7 As shown, the first projection and the second projection are circular.

[0126] Of course, it is understandable that the shapes of the moving magnet 220 and the permanent magnet 210 can be designed to be different, as long as the second projection coincides with the first projection or the second projection falls within the first projection. For example, the moving magnet 220 is a cylinder and the permanent magnet 210 is a prism.

[0127] like Figure 8 As shown, the yoke 100 includes three parts 100a, two of which are yoke plates 110, and the other part 100a is a yoke tube 130. The yoke tube 130 has openings at both axial ends. The two yoke plates 110 are respectively connected to the axial ends of the yoke tube 130 and cover the two openings of the yoke tube 130 respectively. The two permanent magnets 210 are respectively fixedly connected to the surfaces of the two yoke plates 110 facing each other.

[0128] In one embodiment, two yoke plates 110 and one yoke tube 130 may form a hollow cylinder, in which case the yoke plates 110 may be a circular flat plate structure, and the yoke tube 130 may be cylindrical. Of course, in other embodiments, two yoke plates 110 and one yoke tube 130 may form a hollow cube, in which case the yoke plates 110 may be a rectangular flat plate structure, and the yoke tube 130 may be a rectangular tube.

[0129] like Fig. 9 As shown, the yoke 100 includes two parts 100a, each part 100a is an L-shaped yoke 140, and the two L-shaped yokes 140 are connected end to end in sequence to form a rectangular frame; wherein the two permanent magnets 210 are fixedly connected to the two L-shaped yokes 140 respectively.

[0130] For example, each L-shaped yoke 140 includes a first section 141 and a second section 142, and the first section 141 and the second section 142 are both in the shape of a plate. One end of the first section 141 is connected to one end of the second section 142, and the first section 141 and the second section 142 are arranged. One end of the first section 141 of each L-shaped yoke 140 away from the second section 142 is connected to one end of the second section 142 of another L-shaped yoke 140 away from the first section 141. Among them, the first sections 141 of the two L-shaped yokes 140 are arranged opposite to each other, and the second sections 142 of the two L-shaped yokes 140 are arranged opposite to each other.

[0131] The two permanent magnets 210 may be fixedly connected to the surfaces of the two first sections 141 facing each other, or may be fixedly connected to the surfaces of the two second sections 142 facing each other.

[0132] In one implementation, the two L-shaped yokes 140 may be connected by means of clamping, welding, etc., which is not limited in the present application.

[0133] As an example, both ends of one L-shaped yoke 140 are provided with protrusions, and both ends of the other L-shaped yoke 140 are provided with grooves, and the protrusions can be inserted into the grooves.

[0134] like Fig.10 As shown, the yoke 100 includes four parts 100a, each part 100a is a yoke plate 110, and the four yoke plates 110 are connected end to end in sequence to form a rectangular frame; wherein, the two permanent magnets 210 are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates 110.

[0135] In one embodiment, adjacent yoke plates 110 may be connected by means of clamping, welding, etc., which is not limited in the present application.

[0136] As an example, each of the two oppositely disposed yoke plates 110 is provided with protrusions at both ends, and each of the other two oppositely disposed yoke plates 110 is provided with grooves at both ends, and the protrusions can be snapped into the grooves, and the two adjacent yoke plates 110 are snapped together through the corresponding protrusions and grooves.

[0137] like Fig.11 and Fig.12 As shown, another aspect of the present application further provides a relay, comprising the magnetic latching magnetic circuit structure 10 of any of the above embodiments.

[0138] The relay further includes a driving member 20, a moving member 30 and a contact assembly 40. The driving member 20 is connected to the moving magnet 220, the moving member 30 is connected to the driving member 20, and the moving member 30 can drive the contact assembly 40 to switch between a closed state and an open state.

[0139] In summary, the magnetic latching magnetic circuit structure 10 and the relay of the embodiment of the present application have at least the following advantages and beneficial effects:

[0140] The magnetic holding magnetic circuit structure 10 of the embodiment of the present application includes two permanent magnets, a moving magnet 220 and a coil assembly 300. The moving magnet 220 is movably disposed between the two permanent magnets, and the coil assembly 300 is fixedly sleeved on the outer periphery of the moving magnet 220. When the coil assembly 300 is energized to drive the moving magnet 220 to move, the moving magnet 220 is simultaneously subjected to suction and Lorentz force. Under the combined action of suction and Lorentz force, the switching speed of the moving magnet 220 is significantly improved, thereby shortening the switching time of the moving magnet 220.

[0141] Furthermore, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet as the pole surface. When the magnetic circuit structure is in the holding state, the dynamic magnet 220 only contacts one of the permanent magnets and does not contact other parts made of magnetic conductive materials. The permanent magnet provides sufficient suction force to ensure the anti-vibration performance and reliability of the magnetic circuit structure. When the coil assembly 300 is powered on, since the dynamic magnet 220 is only in contact with the permanent magnet and does not contact other parts made of magnetic conductive materials, the magnetic field of other parts will not be offset by the magnetic field generated by the power-on of the coil assembly 300, and then the magnetic field of other parts will not be immediately converted into a reverse magnetic field. Therefore, the problem of the holding suction force becoming zero and then immediately rising will not occur, which significantly improves the switching speed of the dynamic magnet 220.

[0142] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0143] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0144] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0145] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0146] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A magnetic latching magnetic circuit structure, characterized in that: include: The yoke iron encloses a magnetic circuit space; A magnetic assembly is disposed in the magnetic circuit space and includes two permanent magnets spaced apart in a first direction and a dynamic conductive magnet movably disposed between the two permanent magnets; the two permanent magnets are fixedly disposed relative to the yoke, and the polarities of the surfaces of the two permanent magnets facing the dynamic conductive magnet are the same; as well as The coil assembly is fixedly mounted on the outer circumference of the moving magnet, and the coil assembly is configured to drive the moving magnet to move between the two permanent magnets in response to an input signal.

2. The magnetic holding circuit structure according to claim 1, characterized in that: The side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; In the corresponding moving pole surface and the first magnetic pole surface, the orthographic projection of the first magnetic pole surface on a target plane is a first projection, the orthographic projection of the moving pole surface on the target plane is a second projection, and the second projection coincides with the first projection or the second projection falls within the first projection; Wherein, the target plane is perpendicular to the first direction.

3. The magnetic holding magnetic circuit structure according to claim 1, characterized in that: The side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; When the magnetic holding magnetic circuit structure is in a holding state, one of the moving pole faces is in contact with only one of the first magnetic pole faces, and the other moving pole face is separated from the other first magnetic pole face.

4. The magnetic holding magnetic circuit structure according to claim 1, characterized in that: The side of the moving magnet facing the permanent magnet has a moving pole surface, and the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; there is a magnetic gap between the corresponding moving pole surfaces and the first magnetic pole surfaces; The coil assembly encloses an electromagnetic action space, and the two magnetic gaps are located in the electromagnetic action space.

5. The magnetic holding magnetic circuit structure according to claim 4, characterized in that: The coil assembly includes two coil units, the electromagnetic action space has two subspaces, and one coil unit encloses one subspace; The two magnetic gaps are located in the two subspaces respectively.

6. The magnetic holding circuit structure according to claim 5, characterized in that: The coil unit comprises a coil frame and a coil. The coil frame is fixedly sleeved on the outer circumference of the dynamic conductive magnet, and the coil is wound around the outer circumference of the coil frame.

7. The magnetic holding magnetic circuit structure according to claim 5, characterized in that: The moving magnet is movable between a first position and a second position; The two permanent magnets are respectively defined as a first permanent magnet and a second permanent magnet, and the two subspaces are respectively defined as a first subspace and a second subspace; when the moving conductive magnet is located at the first position, the moving conductive magnet is in contact with the first permanent magnet, and the moving conductive magnet is separated from the second permanent magnet, at least part of the first permanent magnet is located in the first subspace, and the entirety of the second permanent magnet is located outside the second subspace; When the moving conductive magnet is located at the second position, the moving conductive magnet is in contact with the second permanent magnet and is separated from the first permanent magnet, at least part of the second permanent magnet is located in the second subspace, and the entire first permanent magnet is located outside the first subspace.

8. The magnetic latching magnetic circuit structure according to claim 1, characterized in that: The two permanent magnets are fixedly connected to the yoke.

9. The magnetic latching magnetic circuit structure according to claim 1, characterized in that: The yoke includes a plurality of parts, and the plurality of parts are connected to form the magnetic circuit space.

10. The magnetic latching magnetic circuit structure according to claim 9, characterized in that: The yoke includes two split bodies, one of which is a yoke plate, and the other is a U-shaped yoke, wherein the U-shaped yoke includes a first plate and two second plates, wherein the first plate and the yoke plate are arranged opposite to each other along the first direction, and the magnetic component is located between the first plate and the yoke plate, and one end of the two second plates are respectively connected to the two ends of the first plate, and the other ends of the two second plates are respectively connected to the two ends of the yoke plate; The two permanent magnets are respectively fixedly connected to the mutually facing surfaces of the first plate and the yoke iron plate.

11. The magnetic latching magnetic circuit structure according to claim 9, characterized in that: The yoke comprises three parts, two of which are yoke plates, and the other part is a yoke cylinder. The yoke cylinder has openings at both axial ends. The two yoke plates are respectively connected to the two axial ends of the yoke cylinder and cover the two openings of the yoke cylinder respectively. Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of the two yoke iron plates facing each other.

12. The magnetic latching magnetic circuit structure according to claim 9, characterized in that: The yoke comprises two parts, each of which is an L-shaped yoke, and the two L-shaped yokes are connected end to end in sequence to form a rectangular frame; Wherein, the two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

13. The magnetic latching magnetic circuit structure according to claim 9, characterized in that: The yoke comprises four parts, each of which is a yoke plate, and the four yoke plates are sequentially connected end to end to form a rectangular frame; Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke iron plates.

14. The magnetic latching magnetic circuit structure according to claim 1, characterized in that: The side of the moving magnet facing the permanent magnet has a moving pole surface, the side of the permanent magnet facing the moving magnet has a first magnetic pole surface, and the two moving pole surfaces correspond to the two first magnetic pole surfaces respectively; The first magnetic pole surface and the moving pole surface are both perpendicular to the first direction.

15. The magnetic latching magnetic circuit structure according to claim 2, characterized in that: The first projection and the second projection are circular, annular or polygonal.

16. A relay, characterized in that: It comprises the magnetic retaining magnetic circuit structure as described in any one of claims 1-15.

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