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 static magnetizers arranged at intervals in the first direction and a movable component movably arranged between the two static magnetizers, the two static magnetizers are fixedly arranged relative to the yoke, and the movable component comprises a movable magnetizer and two permanent magnets; the two permanent magnets are connected to the two ends of the movable magnetizer in the first direction respectively, the two permanent magnets are provided with first magnetic pole faces facing the two static magnetizers respectively, and the polarities of the two first magnetic pole faces are the same; the coil assembly is fixedly arranged relative to the yoke and surrounds the periphery of the magnetic assembly; the coil assembly is configured to drive the movable member to move between the two static magnetizers in response to an input signal.

Description

TECHNICAL FIELD

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

[0002] As a control component, a relay is a driver for controlling a large current with a small current, and is widely used in aerospace, automobiles, household appliances, 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. A magnetic latching relay is usually used as a power supply switching control in its power supply circuit. In order to ensure that the relay can quickly switch to a backup power supply to realize power supply when receiving a control signal in the event of a main power failure, and reduce the loss of failure. Therefore, the switching time of the relay must be short enough, and in order to complete the fast switching, the action speed of the magnetic circuit action mechanism must be fast under a large stroke. However, the switching action of the relay in the related art is not timely enough, which can easily cause power supply failure. CONTENT OF THE UTILITY MODEL

[0003] The magnetic holding magnetic circuit structure and the relay provided by the embodiments of the present application can solve the problem of untimely switching action in the related art.

[0004] The magnetic holding magnetic circuit structure provided by the embodiments of the present application comprises:

[0005] A yoke is arranged to form a magnetic circuit space.

[0006] A magnetic assembly is arranged in the magnetic circuit space and comprises two static magnetic conductors arranged at intervals in a first direction and a movable member movably arranged between the two static magnetic conductors. The two static magnetic conductors are fixedly arranged relative to the yoke. The movable member comprises a dynamic magnetic conductor and two permanent magnets. The two permanent magnets are respectively connected to two ends of the dynamic magnetic conductor in the first direction. The two permanent magnets have first magnetic pole surfaces respectively facing the two static magnetic conductors. The polarities of the two first magnetic pole surfaces are the same.

[0007] A coil assembly is fixedly arranged relative to the yoke and surrounds an outer periphery of the magnetic assembly. The coil assembly is configured to drive the movable member to move between the two static magnetic conductors in response to an input signal.

[0008] According to some embodiments of the present application, the two static magnetic conductors have static pole surfaces respectively facing the two permanent magnets.

[0009] In the corresponding first magnetic pole surface and static pole surface, the first magnetic pole surface has a first projection on a target plane, and the static pole surface has a second projection on the target plane. 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 the present application, the two static conductive magnets have static pole surfaces respectively facing the two permanent magnets.

[0012] When the magnetic holding magnetic circuit structure is in the holding state, one of the static pole surfaces is in contact with one of the first magnetic pole surfaces, and the other static pole surface is separated from the other first magnetic pole surface.

[0013] According to some embodiments of the present application, the two static conductive magnets have static pole surfaces respectively facing the two permanent magnets, and a magnetic gap is formed between the corresponding static pole surface and the first magnetic pole surface. The coil assembly surrounds 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, and the electromagnetic action space has two subspaces. One of the coil units surrounds one of the subspaces.

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

[0016] According to some embodiments of the present application, the two static conductive magnets are fixedly connected to the yoke.

[0017] According to some embodiments of the present application, the yoke includes a plurality of sub-bodies. The plurality of sub-bodies are connected to surround the magnetic circuit space.

[0018] According to some embodiments of the present application, the yoke includes two sub-bodies. One of the sub-bodies is a yoke plate, and the other sub-body is a U-shaped yoke. The U-shaped yoke includes a first plate and two second plates. The first plate is arranged opposite to the yoke plate in the first direction, and the magnetic assembly is located between the first plate and the yoke plate. One end of each of the two second plates is connected to one end of the first plate, and the other end of each of the two second plates is connected to the other end of the yoke plate.

[0019] The two static conductive magnets are respectively fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

[0020] According to some embodiments of the present application, the yoke includes three sub-bodies. Two of the sub-bodies are yoke plates, and the other sub-body is a yoke cylinder. The yoke cylinder has openings at both axial ends. The two yoke plates are respectively connected to the axial ends of the yoke cylinder and cover the two openings of the yoke cylinder.

[0021] Two static magnet conductors are fixedly connected to the surfaces of the two yoke plates.

[0022] According to some embodiments of the present application, the yoke comprises 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.

[0023] Two static magnet conductors are fixedly connected to the two L-shaped yokes.

[0024] According to some embodiments of the present application, the yoke comprises four parts, each part being a yoke plate, and the four yoke plates are connected end to end to form a rectangular frame.

[0025] Two static magnet conductors are fixedly connected to the surfaces of any two opposite yoke plates.

[0026] According to some embodiments of the present application, the two static magnet conductors have static pole surfaces facing the two permanent magnets respectively, and the first magnetic pole surface and the static pole surface are perpendicular to the first direction.

[0027] According to some embodiments of the present application, the first projection and the second projection are circular, annular or polygonal.

[0028] The relay of the embodiments of the present application comprises the magnetic circuit structure of any one of the above.

[0029] The embodiment of the above application has at least the following advantages or beneficial effects:

[0030] The magnetic circuit structure of the embodiments of the present application comprises two static magnet conductors and a movable member movably arranged between the two static magnet conductors, the movable member comprising a movable magnet conductor and two permanent magnets arranged at the two ends of the movable magnet conductor. Since the first magnetic pole surfaces of the two permanent magnets have the same polarity, when the coil assembly is energized to drive the movable member to move, the movable member will be subjected to repulsive force and attractive force in the same direction. Under the combined action of the repulsive force and the attractive force, the switching speed of the movable member is faster, and the switching speed of the movable member is improved.

[0031] Further, the magnetic holding magnetic circuit structure takes the surface of the permanent magnet as the pole surface, and when the magnetic circuit structure is in the holding state, one static magnetic conductor only contacts one permanent magnet and does not contact other parts made of magnetic conductive material, and the permanent magnet provides sufficient suction force to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly is energized, since the static magnetic conductor only contacts the permanent magnet and does not contact other parts made of magnetic conductive material, the phenomenon that the magnetic field of other parts is first offset by the magnetic field generated by the energized coil assembly and then immediately changes to the reverse magnetic field does not occur, and further, the problem that the holding suction force immediately rises after being zero does not occur, and the switching speed of the movable member is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment consistent with the present application and, together with the description, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0033] Figure 1 is a schematic view of the magnetic holding magnetic circuit structure of the first embodiment of the present application.

[0034] Figure 2 is a schematic view of A in Figure 1

[0035] Figure 3 is an exploded schematic view of the magnetic holding magnetic circuit structure.

[0036] Figure 4 is a sectional view along the B-B section line in Figure 2

[0037] Figure 5 is a schematic view of the magnetic field distribution of the magnetic holding magnetic circuit structure of the embodiment of the present application.

[0038] Figure 6 is a schematic view of the permanent magnet, the dynamic magnetic conductor and the coil unit in the magnetic holding magnetic circuit structure of the second embodiment of the present application.

[0039] Figure 7 is a schematic view of the permanent magnet, the dynamic magnetic conductor and the coil unit in the magnetic holding magnetic circuit structure of the third embodiment of the present application.

[0040] Figure 8 is an exploded schematic view of the yoke of another embodiment of the present application.

[0041] Figure 9 is an exploded schematic view of the yoke of another embodiment of the present application. ​​

[0042] Figure 10 This is an exploded view of the yoke of another embodiment of this application.

[0043] Figure 11 This is a top view of a relay according to an embodiment of this application.

[0044] Figure 12 It is along Figure 11 A sectional view after being cut along the CC section line.

[0045] The reference numerals in the attached figures are explained as follows:

[0046] 10. Magnetic holding magnetic circuit structure

[0047] 20. Drive components

[0048] 30. Moving parts

[0049] 40. Contact components

[0050] 100. Yoke

[0051] 100a, split

[0052] 101. Magnetic Circuit Space

[0053] 110. Yoke plate

[0054] 120. U-shaped yoke

[0055] 121. First board

[0056] 122. Second Board

[0057] 130. Yoke cylinder

[0058] 140. L-shaped yoke

[0059] 141. First paragraph

[0060] 142. Second paragraph

[0061] 200. Magnetic components

[0062] 210. Static magnet

[0063] 211. Static surface

[0064] 210a, First stationary magnet

[0065] 210b, Second Static Conductor Magnet

[0066] 220. Movable components

[0067] 221. Moving magnet

[0068] 222.Permanent magnet

[0069] 222a, First permanent magnet

[0070] 222b, Second permanent magnet

[0071] 223. First magnetic pole face

[0072] 224. Second magnetic pole face

[0073] 230. Magnetic gap

[0074] 300. Coil Assembly

[0075] 310. Electromagnetic interaction space

[0076] 311. Subspace

[0077] 320. Coil Unit

[0078] 320a, First Coil Unit

[0079] 320b, Second Coil Unit

[0080] D1, First Direction Detailed Implementation

[0081] 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.

[0082] 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.

[0083] like Figures 1 to 4As 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 encloses a magnetic circuit space 101; the magnetic component 200 is disposed within the magnetic circuit space 101 and includes two stationary magnetic conductors 210 spaced apart along a first direction D1 and a movable member 220 movably disposed between the two stationary magnetic conductors 210. The two stationary magnetic conductors 210 are fixedly disposed relative to the yoke 100. The movable member 220 includes a movable magnetic conductor 221 and two permanent magnets 222. The two permanent magnets 222 are respectively connected to the two ends of the movable magnetic conductor 221 along the first direction D1. The two stationary magnetic conductors 210 have stationary pole surfaces 211 facing the two permanent magnets 222 respectively, and the two permanent magnets 222 have first magnetic pole surfaces 223 facing the two stationary magnetic conductors 210 respectively. The polarities of the two first magnetic pole surfaces 223 are the same. The coil assembly 300 is fixed relative to the yoke 100 and surrounds the outer periphery of the magnetic assembly 200; the coil assembly 300 is configured to drive the movable member 220 to move between two stationary magnets 210 in response to an input signal.

[0084] Among them, permanent magnet 222 is a material that can spontaneously generate a magnetic field and maintain its magnetism for a long time without relying on external current.

[0085] The moving magnetic conductor 221 and the stationary magnetic conductor 210 are made of magnetically conductive materials. These materials include, but are not limited to, iron, silicon steel, and soft magnetic alloys.

[0086] In one embodiment, two permanent magnets 222 are respectively fixedly installed at both ends of the movable magnetic conductor 221 along the first direction D1. The permanent magnets 222 and the movable magnetic conductor 221 can be installed by riveting, welding, gluing, interference fit, etc., and this application does not limit the method.

[0087] Each permanent magnet 222 also has a second magnetic pole surface 224. The first magnetic pole surface 223 and the second magnetic pole surface 224 of each permanent magnet 222 are arranged opposite to each other along the first direction D1 and have opposite polarities.

[0088] The movable member 220 is movable between a first position and a second position; when the movable member 220 is in one of the first position and the second position, one of the stationary pole surfaces 211 is in contact with one of the first magnetic pole surfaces 223, and the other stationary pole surface 211 is separated from the other first magnetic pole surface 223.

[0089] For ease of explanation, the two permanent magnets 222 are defined as the first permanent magnet 222a and the second permanent magnet 222b, respectively, and the two stationary magnetic conductors 210 are defined as the first stationary magnetic conductor 210a and the second stationary magnetic conductor 210b, respectively. The first permanent magnet 222a and the first stationary magnetic conductor 210a are arranged opposite each other along the first direction D1, and the second permanent magnet 222b and the second stationary magnetic conductor 210b are arranged opposite each other along the first direction D1. The first permanent magnet 222a and the second permanent magnet 222b are respectively connected to the two ends of the moving magnetic conductor 221 along the first direction D1, and the polarities of the opposite surfaces of the first permanent magnet 222a and the second permanent magnet 222b along the first direction D1 are the same, that is, the polarities of the first magnetic pole surface 223 of the first permanent magnet 222a and the first magnetic pole surface 223 of the second permanent magnet 222b are the same.

[0090] When the movable member 220 is in the first position, the stationary pole surface 211 of the first stationary magnet 210a is in contact with the first magnetic pole surface 223 of the first permanent magnet 222a, and the stationary pole surface 211 of the second stationary magnet 210b is separated from the first magnetic pole surface 223 of the second permanent magnet 222b. When the movable member 220 is in the second position, the stationary pole surface 211 of the second stationary magnet 210b is in contact with the first magnetic pole surface 223 of the second permanent magnet 222b, and the stationary pole surface 211 of the first stationary magnet 210a is separated from the first magnetic pole surface 223 of the first permanent magnet 222a.

[0091] like Figure 3 and Figure 4 As shown, the coil assembly 300 forms an electromagnetic interaction space 310, and a magnetic gap 230 is formed between the corresponding stationary pole surface 211 and the first magnetic pole surface 223. Both magnetic gaps 230 are located within the electromagnetic interaction space 310.

[0092] Of course, in other embodiments, the two magnetic gaps 230 may also be located outside the electromagnetic action space 310 of the coil assembly 300.

[0093] In one embodiment, the coil assembly 300 includes two coil units 320, which are spaced apart along a first direction D1. The electromagnetic interaction space 310 has two subspaces 311, with one coil unit 320 enclosing one subspace 311; two magnetic gaps 230 are located within the two subspaces 311 respectively. The two coil units 320 are defined as a first coil unit 320a and a second coil unit 320b, respectively. The first coil unit 320a surrounds the outer periphery of one of the magnetic gaps 230, and the second coil unit 320b surrounds the outer periphery of the other magnetic gap 230.

[0094] 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.

[0095] Of course, in other embodiments, the length of the coil assembly 300 along the first direction D1 can also be designed to be longer so as to completely surround the movable member 220, and the coil assembly 300 surrounds the outer periphery of the two magnetic gaps 230.

[0096] like Figure 5 As shown, when the movable member 220 is in the position shown in the figure (first position) and the coil assembly 300 is not energized, the distance between the first static magnet 210a and the first permanent magnet 222a is relatively close, and the first permanent magnet 222a and the first static magnet 210a will generate an attractive force. That is, the first permanent magnet 222a can provide a strong holding force to the movable member 220 to keep the movable member 220 in the first position. At the same time, since the distance between the second static magnet 210b and the second permanent magnet 222b is relatively far, the attractive force generated between the second permanent magnet 222b and the second static magnet 210b is very small. Therefore, the movable member 220 can be kept in the first position, that is, the first permanent magnet 222a is in contact with the first static magnet 210a, while the second permanent magnet 222b is separated from the second static magnet 210b.

[0097] It should be noted that when the movable component 220 is held in the first position, the first permanent magnet 222a is in contact with the first static magnet 210a, which magnetizes the first static magnet 210a and generates a first magnetic field M1.

[0098] When both coil units 320 are energized in the same direction, the first coil unit 320a generates a second magnetic field M2. The direction of the second magnetic field M2 is opposite to the direction of the first magnetic field M1. As the power of the first coil unit 320a gradually increases, the second magnetic field M2 will cancel out the first magnetic field M1. When the first magnetic field M1 is completely canceled out by the second magnetic field M2, the first stationary magnet 210a will generate a third magnetic field M3 under the action of the second magnetic field M2. However, the magnetic field of the first permanent magnet 222a is not easily canceled out by the second magnetic field M2, so the first permanent magnet 222a still maintains its original magnetic field direction. At this time, the direction of the third magnetic field M3 is opposite to the direction of the magnetic field of the first permanent magnet 222a. At this time, a repulsive force will be generated between the first stationary magnet 210a and the first permanent magnet 222a. At the same time, after the second coil unit 320b is energized, it can generate a fourth magnetic field M4. The second static magnetic conductor 210b will be affected by the fourth magnetic field M4 and generate a fifth magnetic field M5. The direction of the fifth magnetic field M5 is the same as the direction of the magnetic field of the second permanent magnet 222b. Therefore, an attractive force will be generated between the second static magnetic conductor 210b and the second permanent magnet 222b.

[0099] Therefore, when the first coil unit 320a and the second coil unit 320b are energized in the same direction, the movable member 220 is simultaneously subjected to a repulsive force from the first stationary magnet 210a and an attractive force from the second stationary magnet 210b. Since the repulsive and attractive forces are in the same direction, the movable member 220 tends to move towards the second position. Under the combined action of the repulsive and attractive forces, the driving force for the movable member 220 to switch from the first position to the second position is greater, and the switching speed is faster.

[0100] Therefore, the magnetic holding magnetic circuit structure of this application embodiment includes two static magnetic conductors 210 and a movable member 220 movably disposed between the two static magnetic conductors 210. The movable member 220 includes a moving magnetic conductor 221 and two permanent magnets 222 respectively disposed at both ends of the moving magnetic conductor 221. Since the first magnetic pole surfaces 223 of the two permanent magnets 222 have the same polarity, when the coil assembly 300 is energized and drives the movable member 220 to move, the movable member 220 will be subjected to repulsive and attractive forces in the same direction. Under the combined action of repulsive and attractive forces, the switching speed of the movable member 220 is faster, thereby improving the switching speed of the movable member 220.

[0101] In one embodiment, when the magnetic holding circuit structure is in the holding state, one of the stationary pole surfaces 211 is in contact with only one of the first magnetic pole surfaces 223, while the other stationary pole surface 211 is separated from the other first magnetic pole surface 223.

[0102] It should be noted that in the existing magnetic holding circuit structure, one side surface of a component made of high magnetic permeability material is usually used as the pole surface. As the coil power increases, the magnetic field of the component made of high magnetic permeability material is canceled by the magnetic field generated by the coil and will immediately turn into the opposite 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.

[0103] In this embodiment, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet 222 as the pole face. When the magnetic circuit structure is in the holding state, one of the stationary magnetic conductors 210 is in contact with only one of the permanent magnets 222 and does not contact other components made of magnetically conductive material. The permanent magnet 222 provides sufficient attraction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, since the stationary magnetic conductor 210 is in contact with only the permanent magnet 222 and not with 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 turns into a reverse magnetic field. Therefore, there will be no problem that the holding attraction becomes zero and then immediately rises again, which significantly improves the switching speed of the movable component 220.

[0104] like Figure 3 and Figure 4 As shown, two stationary magnets 210 are fixedly connected to the yoke 100.

[0105] Of course, in other embodiments, when the magnetic holding magnetic circuit structure 10 is installed in the relay, the two stationary magnets 210 can also be fixedly connected to other components of the relay to ensure that the two stationary magnets 210 are in contact with the yoke 100.

[0106] 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.

[0107] 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.

[0108] In other embodiments, the yoke 100 may also be a completely closed ring structure.

[0109] 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 stationary 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 stationary magnet 210a is fixedly connected to the first plate 121, and the second stationary magnet 210b is fixedly connected to the yoke plate 110.

[0110] In one embodiment, the first magnetic pole surface 223, the second magnetic pole surface 224, and the stationary pole surface 211 are all perpendicular to the first direction D1.

[0111] Of course, in other embodiments, the first magnetic pole surface 223, the second magnetic pole surface 224 and the stationary pole surface 211 may not be perpendicular to the first direction D1.

[0112] In one embodiment, in the corresponding first magnetic pole surface 223 and stationary pole surface 211, the orthographic projection of the first magnetic pole surface 223 onto a target plane is the first projection, and the orthographic projection of the stationary pole surface 211 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.

[0113] 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 can further ensure that when in the holding state, the static magnetic conductor 210 only contacts the permanent magnet 222 and does not contact other components made of magnetic material.

[0114] Of course, in other embodiments, the first projection may also fall within the second projection. In this case, although a portion of the stationary pole surface 211 extends beyond the edge of the first magnetic pole surface 223, as long as a sufficiently large gap is maintained between other components made of magnetically conductive material and the stationary pole surface 211, the influence of other components made of magnetically conductive material on the switching action of the movable member 220 can be reduced.

[0115] In one embodiment, the first projection and the second projection are circular, that is, both the static magnet 210 and the permanent magnet 222 are cylinders.

[0116] like Figure 6As shown, the first and second projections are polygons, that is, the static magnetic conductor 210 and the permanent magnet 222 are prisms. For example, triangular prisms, quadrangular prisms, and pentagonal prisms.

[0117] like Figure 7 As shown, the first projection and the second projection are circular.

[0118] Of course, it is understandable that the shapes of the static magnet 210 and the permanent magnet 222 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 static magnet 210 can be a cylinder and the permanent magnet 222 can be a prism.

[0119] 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 stationary magnetic conductors 210 are respectively fixedly connected to the surfaces of the two yoke plates 110 facing each other.

[0120] 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.

[0121] 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 static magnetic conductors 210 are fixedly connected to the two L-shaped yokes 140 respectively.

[0122] 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.

[0123] The two static magnetic conductors 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.

[0124] 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.

[0125] 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.

[0126] 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 static magnetic conductors 210 are fixedly connected to the surfaces of any two oppositely arranged yoke plates 110.

[0127] In one embodiment, adjacent yoke plates 110 can be connected by snap-fitting, welding or other means, and this application does not limit this.

[0128] 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.

[0129] 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.

[0130] 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 movable element 220, for example, the drive element 20 is connected to the moving magnet 221, 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.

[0131] In one embodiment, the coil assembly 300 may be fixedly connected to the housing of the relay, but is not limited thereto.

[0132] 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:

[0133] The magnetic holding magnetic circuit structure of this application embodiment includes two stationary magnetic conductors 210 and a movable member 220 movably disposed between the two stationary magnetic conductors 210. The movable member 220 includes a moving magnetic conductor 221 and two permanent magnets 222 disposed at both ends of the moving magnetic conductor 221. Since the first magnetic pole surfaces 223 of the two permanent magnets 222 have the same polarity, when the coil assembly 300 is energized and drives the movable member 220 to move, the movable member 220 will be subjected to repulsive and attractive forces in the same direction. Under the combined action of repulsive and attractive forces, the switching speed of the movable member 220 is faster, thereby improving the switching speed of the movable member 220.

[0134] Furthermore, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet 222 as the pole face. When the magnetic circuit structure is in the holding state, one of the stationary magnetic conductors 210 only contacts one of the permanent magnets 222 and does not contact other components made of magnetically conductive material. The permanent magnet 222 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 stationary magnetic conductor 210 only contacts the permanent magnet 222 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 that the holding attraction force becomes zero and then immediately rises again, which significantly improves the switching speed of the movable member 220. It is understood that the various embodiments / implementations provided in this application can be combined with each other without contradiction, and will not be described one by one here.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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 assembly, disposed within the magnetic circuit space, includes two stationary magnetic conductors spaced apart along a first direction and a movable member movably disposed between the two stationary magnetic conductors. The two stationary magnetic conductors are fixedly disposed relative to the yoke. The movable member includes a moving magnetic conductor and two permanent magnets. The two permanent magnets are respectively connected to the two ends of the moving magnetic conductor along the first direction. The two permanent magnets have first magnetic pole faces respectively facing the two stationary magnetic conductors, and the polarities of the two first magnetic pole faces are the same. A coil assembly is fixed relative to the yoke and surrounds the outer periphery of the magnetic assembly; the coil assembly is configured to drive the movable member to move between the two stationary magnets in response to an input signal.

2. The magnetic holding circuit structure according to claim 1, characterized in that, The two static conductive magnets each have a static pole face that faces the two permanent magnets respectively; In the corresponding first magnetic pole surface and the static pole surface, the orthographic projection of the first magnetic pole surface onto a target plane is the first projection, and the orthographic projection of the static pole surface onto 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 two static conductive magnets each have a static pole face that faces the two permanent magnets respectively; When the magnetic holding circuit structure is in the holding state, one of the stationary pole surfaces is in contact with only one of the first magnetic pole surfaces, and the other stationary 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 two static magnetic conductors have static pole surfaces that face the two permanent magnets respectively. There is a magnetic gap between the corresponding static 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 1, characterized in that, The two statically conductive magnets are fixedly connected to the yoke.

7. 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.

8. The magnetic holding circuit structure according to claim 7, characterized in that, The yoke includes two separate 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 in 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 static magnetic conductors are respectively fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

9. The magnetic holding circuit structure according to claim 7, 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 static magnets are respectively fixedly connected to the surfaces of the two yoke plates facing each other.

10. The magnetic holding circuit structure according to claim 7, 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 static conductors are respectively fixedly connected to the two L-shaped yokes.

11. The magnetic holding circuit structure according to claim 7, 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 static magnetic conductors are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

12. The magnetic holding circuit structure according to claim 1, characterized in that, The two static magnetic conductors have static pole surfaces that face the two permanent magnets respectively, and both the first magnetic pole surface and the static pole surface are perpendicular to the first direction.

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

14. A relay, characterized in that, Includes the magnetic holding magnetic circuit structure as described in any one of claims 1-13.

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