Magnetic latching magnetic circuit structure and relay

Abstract

The utility model 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] This application relates to the field of electrical control device technology, and more specifically, to a magnetic latching circuit structure and a relay. Background Technology

[0002] Relays, as control components, are driving devices that use small currents to control large currents, and are widely used in aerospace, automotive, home appliances, and industrial control fields. In recent years, with the rapid development of the internet, internet data centers are crucial for supporting internet services. Magnetic latching relays are typically used in their power supply circuits for power switching control. To ensure that in the event of a main power failure, the relay can quickly switch to a backup power source upon receiving a control signal, minimizing power loss, the relay's switching time must be sufficiently short. To achieve rapid switching, its magnetic circuit actuation mechanism must operate quickly over a large stroke. However, the switching action of relays in related technologies is not timely enough, easily leading to power supply failures. Utility Model Content

[0003] This application provides a magnetic latching circuit structure and a relay to solve the problem of untimely switching action in related technologies.

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

[0005] The yoke forms a magnetic circuit space;

[0006] A magnetic assembly, disposed within the magnetic circuit space, includes two permanent magnets spaced apart along a first direction and a movable magnetic conductor movably disposed between the two permanent magnets; the two permanent magnets are fixedly disposed relative to the yoke, and the surfaces of the two permanent magnets facing the movable magnetic conductor have the same polarity; and

[0007] A coil assembly is fixedly sleeved on the outer periphery 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 this application, the side of the moving magnetic conductor facing the permanent magnet has a moving pole surface, and the side of the permanent magnet facing the moving magnetic conductor 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 the first projection, and the orthographic projection of the moving pole surface on the target plane is the second projection. The second projection coincides with the first projection or the second projection falls within the first projection.

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

[0011] According to some embodiments of this application, the side of the moving magnetic conductor facing the permanent magnet has a moving pole surface, and the side of the permanent magnet facing the moving magnetic conductor 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 circuit structure is in the holding state, one of the moving pole surfaces is in contact with only one of the first magnetic pole surfaces, and the other moving pole surface is separated from the other first magnetic pole surface.

[0013] According to some embodiments of this application, the moving magnetic conductor has a moving pole surface on the side facing the permanent magnet, and the permanent magnet has a first magnetic pole surface on the side facing the moving magnetic conductor. The two moving pole surfaces correspond to the two first magnetic pole surfaces respectively. There is a magnetic gap between the corresponding moving pole surface and the first magnetic pole surface. The coil assembly forms an electromagnetic interaction space, and the two magnetic gaps are located within the electromagnetic interaction space.

[0014] According to some embodiments of this application, the coil assembly includes two coil units, and the electromagnetic interaction space has two subspaces, with one coil unit enclosing one of the subspaces.

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

[0016] According to some embodiments of this application, the coil unit includes a coil frame and a coil, the coil frame being fixedly sleeved on the outer periphery of the moving magnetic body, and the coil being wound around the outer periphery of the coil frame.

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

[0018] The two permanent magnets are defined as a first permanent magnet and a second permanent magnet, respectively, and the two subspaces are defined as a first subspace and a second subspace, respectively. When the moving magnetic conductor is located in the first position, the moving magnetic conductor is in contact with the first permanent magnet and is separated from the second permanent magnet. At least a portion of the first permanent magnet is located within the first subspace, and the entire second permanent magnet is located outside the second subspace. When the moving magnetic conductor is located in the second position, the moving magnetic conductor is in contact with the second permanent magnet and is separated from the first permanent magnet. At least a portion of the second permanent magnet is located within the second subspace, and the entire first permanent magnet is located outside the first subspace.

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

[0020] According to some embodiments of this application, the yoke comprises multiple parts, which are connected to form the magnetic circuit space.

[0021] According to some embodiments of this application, the yoke includes two parts, 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 each of the two second plates is connected to both ends of the first plate, and the other end of each of the two second plates is connected to both ends of the yoke plate.

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

[0023] According to some embodiments of this application, the yoke comprises three parts, two of which are yoke plates and the other is a yoke cylinder. The yoke cylinder has openings at both axial ends, and the two yoke plates are respectively connected to the two axial ends of the yoke cylinder and respectively seal the two openings of the yoke cylinder.

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

[0025] According to some embodiments of this application, the yoke includes two parts, each part being an L-shaped yoke, and the two L-shaped yokes are connected end to end to form a rectangular frame.

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

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

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

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

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

[0031] The relays in this application include the magnetic latching circuit structure described in any of the preceding claims.

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

[0033] The magnetic holding circuit structure of this application embodiment includes two permanent magnets, a moving magnetic conductor, and a coil assembly. The moving magnetic conductor is movably disposed between the two permanent magnets, and the coil assembly is fixedly sleeved on the outer periphery of the moving magnetic conductor. When the coil assembly is energized and drives the moving magnetic conductor to move, the moving magnetic conductor is simultaneously subjected to attractive force and Lorentz force. Under the combined action of the attractive force and the Lorentz force, the switching speed of the moving magnetic conductor is significantly improved, and the switching time of the moving magnetic conductor is shortened.

[0034] Furthermore, the magnetic holding circuit structure uses the surface of the permanent magnet as the pole face. When the magnetic circuit structure is in the holding state, the moving magnetic conductor only contacts one of the permanent magnets and does not contact other components made of magnetically conductive material. This permanent magnet provides sufficient attraction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly is energized, since the moving magnetic conductor only contacts the permanent magnet and not other components made of magnetically conductive material, there is no phenomenon where the magnetic field of other components is first canceled by the magnetic field generated by the energization of the coil assembly, and then the magnetic field of other components immediately changes to a reverse magnetic field. Therefore, the problem of the holding attraction becoming zero and then immediately rising again is avoided, significantly improving the switching speed of the moving magnetic conductor. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0036] Figure 1 This is a three-dimensional schematic diagram of the magnetic holding circuit structure of the first embodiment of this application.

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

[0038] Figure 3 This is an exploded schematic diagram of the magnetic holding circuit structure.

[0039] Figure 4 It is along Figure 2 A sectional view after being cut along the BB section line.

[0040] Figure 5 This is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure according to an embodiment of this application.

[0041] Figure 6 This is a schematic diagram of the permanent magnet, the moving conductor, and the coil unit in the magnetic holding magnetic circuit structure of the second embodiment of this application.

[0042] Figure 7 This is a schematic diagram of the permanent magnet, the moving conductor, and the coil unit in the magnetic holding magnetic circuit structure of the third embodiment of this application.

[0043] Figure 8 This is an exploded schematic diagram of the yoke of another embodiment of this application.

[0044] Figure 9 This is an exploded view of the yoke of another embodiment of this application.

[0045] Figure 10 This is an exploded view of the yoke of another embodiment of this application.

[0046] Figure 11 This is a top view of a relay according to an embodiment of this application.

[0047] Figure 12 It is along Figure 11 A sectional view after being cut along the CC section line.

[0048] The reference numerals in the attached figures are explained as follows:

[0049] 10. Magnetic holding magnetic circuit structure

[0050] 20. Drive components

[0051] 30. Moving parts

[0052] 40. Contact components

[0053] 100. Yoke

[0054] 100a, split

[0055] 101. Magnetic Circuit Space

[0056] 110. Yoke plate

[0057] 120. U-shaped yoke

[0058] 121. First board

[0059] 122. Second Board

[0060] 130. Yoke cylinder

[0061] 140. L-shaped yoke

[0062] 141. First paragraph

[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 face

[0069] 212. Second magnetic pole face

[0070] 220. Moving magnet

[0071] 221. Moving electrode 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 Implementation

[0084] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

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

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

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

[0088] The moving magnetic conductor 220 is made of a magnetically conductive material. This magnetically conductive material includes, but is not limited to, iron, silicon steel, and soft magnetic alloys.

[0089] The magnetic holding circuit structure 10 includes a holding state and an energized state. When the magnetic holding circuit structure 10 is in the holding state, the moving magnetic conductor 220 is in contact with one of the permanent magnets 210 and separated from the other permanent magnet 210. When the magnetic holding circuit structure 10 is in the energized state, current is passed through the coil assembly 300, and the coil assembly 300 is configured to drive the moving magnetic conductor 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 movable magnetic conductor 220 is movable between a first position and a second position. When the movable magnetic conductor 220 is in one of the first and second positions, it is in contact with one of the permanent magnets 210 and separated from the other permanent magnet 210.

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

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

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

[0094] When the moving magnetic conductor 220 is in the first position, one of its moving pole surfaces 221 is in contact with the first magnetic pole surface 211 of the first permanent magnet 210a, while the other moving pole surface 221 is separated from the first magnetic pole surface 211 of the second permanent magnet 210b; when the moving magnetic conductor 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, while one of its 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 also has a second magnetic pole surface 212. The first magnetic pole surface 211 and the second magnetic pole surface 212 of each permanent magnet 210 are arranged opposite to each other along the first direction D1 and have opposite polarities.

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

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

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

[0099] In the embodiments of this application, two coil units 320 are respectively wrapped around the outer periphery of two magnetic gaps 230, so that the length of each coil unit 320 along the first direction D1 does not need to be too long, saving material costs.

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

[0101] The two coil units 320 are defined as the first coil unit 320a and the second coil unit 320b, respectively. The two subspaces 311 are defined as the first subspace 311a and the second subspace 311b, respectively. The first coil unit 320a forms the first subspace 311a, and the second coil unit 320b forms 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 periphery of the moving magnetic body 220, and the coil 322 is wound around the outer periphery of the coil frame 321.

[0103] As an example, the connection between the coil frame 321 and the moving magnetic body 220 can be by interference fit, welding, gluing, etc., and this application does not limit this.

[0104] like Figure 5 As shown, when the moving magnetic conductor 220 is in the position shown in the figure (first position) and the coil assembly 300 is not de-energized, the distance between the moving magnetic conductor 220 and the first permanent magnet 210a is relatively close, and the first permanent magnet 210a attracts the moving magnetic conductor 220, providing a strong holding force to the moving magnetic conductor 220 and the coil assembly 300. Simultaneously, the distance between the moving magnetic conductor 220 and the second permanent magnet 210b is relatively large, so the attraction between the second permanent magnet 210b and the moving magnetic conductor 220 is very small. Therefore, the moving magnetic conductor 220 can remain in the first position.

[0105] When both coil units 320 are energized in the same direction, the magnetic field generated by the first coil unit 320a is opposite in direction to the magnetic field generated by the first permanent magnet 210a. This weakens the magnetic field generated by the first permanent magnet 210a, thus reducing the attraction of the first permanent magnet 210a to the moving magnet 220. The magnetic field generated by the second coil unit 320b is in the same direction as the magnetic field generated by the second permanent magnet 210b. The two magnetic fields superimpose, increasing the attraction of the second permanent magnet 210b to the moving magnet 220. This design results in a "one increases, one decreases" attraction on the moving magnet 220, improving its switching speed.

[0106] Simultaneously, when the first coil unit 320a is energized, it experiences a first Lorentz force exerted by the first permanent magnet 210a. According to the left-hand rule, the direction of this first Lorentz force is such that it drives the moving magnet 220 and the first coil unit 320a to move along the first direction D1 towards the second permanent magnet 210b; that is, the direction of the first Lorentz force is the same as the direction of the attraction force exerted on the moving magnet 220 by the second permanent magnet 210b. At the same time, when the second coil unit 320b is energized, it also experiences a second Lorentz force exerted by the second permanent magnet 210b. According to the left-hand rule, the direction of this second Lorentz force is opposite to the direction of the attraction force exerted on the moving magnet 220 by 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, which in turn makes the driving force on the moving magnet 220 and the coil assembly 300 still increase.

[0107] Therefore, the magnetic holding magnetic circuit structure 10 of this application embodiment includes two permanent magnets 210, a moving magnetic conductor 220, and a coil assembly 300. The moving magnetic conductor 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 magnetic conductor 220. When the coil assembly 300 is energized and drives the moving magnetic conductor 220 to move, the moving magnetic conductor 220 is simultaneously subjected to attraction and Lorentz force. Under the combined action of attraction and Lorentz force, the switching speed of the moving magnetic conductor 220 is significantly improved, and the switching time of the moving magnetic conductor 220 is shortened.

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

[0109] In the embodiments of this application, when the moving magnet 220 is in the first position, at least a portion of the first permanent magnet 210a is located within the first subspace 311a, and all of the second permanent magnet 210b is located outside the second subspace 311b. This makes the magnetic field strength of the first coil unit 320a under the first permanent magnet 210a significantly weaker than that of the second coil unit 320b under the second permanent magnet 210b. Consequently, the Lorentz force exerted on the first coil unit 320a by the first permanent magnet 210a is greater than that exerted on the second coil unit 320b by the second permanent magnet 210b. Ultimately, this results in an increase in the overall driving force experienced by the moving magnet 220 during switching.

[0110] Similarly, when the moving magnet 220 is in the second position, at least a portion of the second permanent magnet 210b is located within the second subspace 311b, while the entire first permanent magnet 210a is 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 circuit structure is in the holding state, one of the moving pole surfaces 221 is in contact with only one of the first magnetic pole surfaces 211, while the other moving pole surface 221 is separated from the other first magnetic pole surface 211. It should be noted that in existing magnetic holding circuit structures, one side surface of a component made of a high-permeability material is typically used as the pole surface. As the coil power increases, the magnetic field of the component made of the high-permeability material is canceled out by the magnetic field generated by the coil, and immediately transforms into a reverse magnetic field. That is, the holding force becomes zero and then immediately rises again, which is not conducive to the rapid switching of the magnetic circuit structure.

[0112] In this embodiment, the magnetic holding magnetic circuit structure 10 uses the surface of a permanent magnet as its pole. When the magnetic circuit structure is in the holding state, the moving magnetic conductor 220 only contacts one of the permanent magnets and does not contact other components made of magnetically conductive material. The permanent magnet provides sufficient attraction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, since the moving magnetic conductor 220 only contacts the permanent magnet and does not contact other components made of magnetically conductive material, there is no phenomenon where the magnetic field of other components is first canceled by the magnetic field generated by the energization of the coil assembly 300, and then the magnetic field of other components immediately changes to the opposite magnetic field. Therefore, there is no problem that the holding attraction becomes zero and then immediately rises again, which significantly improves the switching speed of the moving magnetic conductor 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 holding circuit structure 10 is installed in the relay, the two permanent magnets 210 can 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 multiple parts 100a, which are connected end to end to form a magnetic circuit space 101.

[0116] In the embodiments of this application, the yoke 100 adopts a structure in which multiple separate parts 100a are connected end to end, which facilitates processing and assembly.

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

[0118] In one embodiment, the yoke 100 includes two parts 100a, one part 100a being a yoke plate 110 and the other part 100a being a U-shaped yoke 120. 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 disposed opposite each other in a first direction D1, and the magnetic component 200 is located between the first plate 121 and the yoke plate 110. One end of each of the two second plates 122 is connected to both ends of the first plate 121, and the other end of each of the two second plates 122 is connected to both ends of the yoke plate 110. Two permanent magnets 210 are fixedly connected to the surfaces of the first plate 121 and the yoke plate 110 facing each other. In this embodiment, 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 not be perpendicular to the first direction D1.

[0121] In one embodiment, in the corresponding moving pole surface 221 and the first magnetic pole surface 211, the orthographic projection of the first magnetic pole surface 211 onto the target plane is the first projection, and the orthographic projection of the moving pole surface 221 onto the target plane is the second projection. The second projection coincides with the first projection or falls within the first projection; wherein, the target plane is perpendicular to the first direction D1. In the embodiments of this 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. This further ensures that when in the holding state, the moving magnetic conductor 220 only contacts the permanent magnet 210 and does not contact other components made of magnetically conductive material.

[0122] Of course, in other embodiments, the first projection may also fall within the second projection. In this case, although a portion of the moving pole surface 221 of the moving magnetic conductor 220 extends beyond the edge of the first magnetic pole surface 211, as long as a sufficiently large gap is reserved between other components made of magnetic material and the moving pole surface 221, the influence of other components made of magnetic material on the switching action of the moving magnetic conductor 220 can be reduced.

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

[0124] like Figure 6 As shown, the first and second projections are polygons, meaning the moving magnetic conductor 220 and the permanent magnet are prisms. For example, 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 can be a cylinder, and the permanent magnet 210 can be 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 cylinder 130. The yoke cylinder 130 has openings at both axial ends. The two yoke plates 110 are respectively connected to the two axial ends of the yoke cylinder 130 and respectively cover the two openings of the yoke cylinder 130. Two permanent magnets 210 are respectively fixedly connected to the surfaces of the two yoke plates 110 facing each other.

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

[0129] like Figure 9 As shown, the yoke 100 includes two parts 100a, each part 100a being an L-shaped yoke 140. The two L-shaped yokes 140 are connected end to end to form a rectangular frame. 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 segment 141 and a second segment 142, both of which are flat. One end of the first segment 141 is connected to one end of the second segment 142, and the first segment 141 and the second segment 142 are arranged accordingly. The end of the first segment 141 of each L-shaped yoke 140 away from the second segment 142 is connected to the end of the second segment 142 of another L-shaped yoke 140 away from the first segment 141. The first segments 141 of the two L-shaped yokes 140 are arranged opposite each other, and the second segments 142 of the two L-shaped yokes 140 are also arranged opposite each other.

[0131] The two permanent magnets 210 can be fixedly connected to the two facing surfaces of the two first segments 141, or they can be fixedly connected to the two facing surfaces of the two second segments 142.

[0132] In one embodiment, the two L-shaped yokes 140 can be connected by snap-fitting, welding or other means, which is not limited in this application.

[0133] As an example, one of the L-shaped yokes 140 has protrusions at both ends, and the other L-shaped yoke 140 has grooves at both ends, with the protrusions able to fit into the grooves.

[0134] like Figure 10 As shown, the yoke 100 includes four parts 100a, each part 100a being a yoke plate 110. The four yoke plates 110 are connected end to end to form a rectangular frame. Two permanent magnets 210 are fixedly connected to the surfaces of any two oppositely arranged yoke plates 110.

[0135] In one embodiment, adjacent yoke plates 110 can be connected by snap-fitting, welding or other means, and this application does not limit this.

[0136] As an example, each of the two opposing yoke plates 110 has protrusions at both ends, and each of the other two opposing yoke plates 110 has grooves at both ends. The protrusions can be inserted into the grooves, and the two adjacent yoke plates 110 are engaged through the corresponding protrusions and grooves.

[0137] like Figure 11 and Figure 12 As shown, in another aspect of this application, a relay is also provided, including the magnetic holding circuit structure 10 of any of the above embodiments.

[0138] The relay also includes a drive element 20, a moving element 30, and a contact assembly 40. The drive element 20 is connected to the moving magnetic core 220, the moving element 30 is connected to the drive element 20, and the moving element 30 can drive the contact assembly 40 to switch between a closed state and an open state.

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

[0140] The magnetic holding circuit structure 10 of this application embodiment includes two permanent magnets, a movable magnetic conductor 220, and a coil assembly 300. The movable magnetic conductor 220 is movably disposed between the two permanent magnets, and the coil assembly 300 is fixedly sleeved on the outer periphery of the movable magnetic conductor 220. When the coil assembly 300 is energized and drives the movable magnetic conductor 220 to move, the movable magnetic conductor 220 is simultaneously subjected to attraction and Lorentz force. Under the combined action of attraction and Lorentz force, the switching speed of the movable magnetic conductor 220 is significantly improved, and the switching time of the movable magnetic conductor 220 is shortened.

[0141] Furthermore, the magnetic holding circuit structure 10 uses the surface of the permanent magnet as the pole face. When the magnetic circuit structure is in the holding state, the moving magnetic conductor 220 only contacts one of the permanent magnets and does not contact other components made of magnetically conductive material. The permanent magnet provides sufficient attraction force to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, since the moving magnetic conductor 220 only contacts the permanent magnet and does not contact other components made of magnetically conductive material, there will be no phenomenon where the magnetic field of other components is first canceled by the magnetic field generated by the energization of the coil assembly 300, and then the magnetic field of other components immediately changes to the opposite magnetic field. Therefore, there will be no problem of the holding attraction force becoming zero and then immediately rising again, which significantly improves the switching speed of the moving magnetic conductor 220.

[0142] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0143] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0144] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0145] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0146] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A magnetically held magnetic circuit structure, characterized in that, include: The yoke forms a magnetic circuit space; A magnetic component is disposed within the magnetic circuit space and includes two permanent magnets spaced apart along a first direction and a movable magnetic conductor 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 movable magnetic conductor are the same; as well as A coil assembly is fixedly sleeved on the outer periphery 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 moving magnetic conductor has a moving pole surface on the side facing the permanent magnet, and the permanent magnet has a first magnetic pole surface on the side facing the moving magnetic conductor. 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 the first projection, and the orthographic projection of the moving pole surface on the target plane is the second projection. The second projection coincides with the first projection or the second projection falls within the first projection. The target plane is perpendicular to the first direction.

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

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

5. The magnetic holding circuit structure according to claim 4, characterized in that, The coil assembly includes two coil units, and the electromagnetic interaction space has two subspaces, with one coil unit enclosing one of the subspaces. The two magnetic gaps are located within the two subspaces, respectively.

6. The magnetic holding circuit structure according to claim 5, characterized in that, The coil unit includes a coil frame and a coil. The coil frame is fixedly sleeved on the outer periphery of the moving magnetic body, and the coil is wound around the outer periphery of the coil frame.

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

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

9. The magnetic holding circuit structure according to claim 1, characterized in that, The yoke comprises multiple parts, which are connected to form the magnetic circuit space.

10. The magnetic holding circuit structure according to claim 9, characterized in that, The yoke comprises two parts, one of which is a yoke plate and the other is a U-shaped yoke. The U-shaped yoke comprises 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 each of the two second plates is connected to both ends of the first plate, and the other end of each of the two second plates is connected to both ends of the yoke plate. The two permanent magnets are respectively fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

11. The magnetic holding circuit structure according to claim 9, characterized in that, The yoke comprises three parts, two of which are yoke plates and the other 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 respectively seal the two openings of the yoke cylinder. The two permanent magnets are respectively fixedly connected to the surfaces of the two yoke plates facing each other.

12. The magnetic holding circuit structure according to claim 9, characterized in that, The yoke includes two parts, each part being an L-shaped yoke, and the two L-shaped yokes are connected end to end to form a rectangular frame. The two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

13. The magnetic holding 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 connected end to end to form a rectangular frame. The two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

14. The magnetic holding circuit structure according to claim 1, characterized in that, The moving magnetic conductor has a moving pole surface on the side facing the permanent magnet, and the permanent magnet has a first magnetic pole surface on the side facing the moving magnetic conductor. The two moving pole surfaces correspond to the two first magnetic pole surfaces respectively. Both the first magnetic pole surface and the moving pole surface are perpendicular to the first direction.

15. The magnetic holding 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, Includes the magnetic holding magnetic circuit structure as described in any one of claims 1-15.

Images