Magnetic latching magnetic circuit structure and relay

Abstract

The utility model discloses a magnetic latching magnetic circuit structure and a relay. The 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 arranged at intervals and a movable magnetizer movably arranged between the two permanent magnets, the two permanent magnets are fixedly arranged relative to the yoke, two first magnetic pole faces of the permanent magnets make contact with the inner ring face of the yoke, and two second magnetic pole faces of the permanent magnets are arranged in a face-to-face mode. The polarities of the two second magnetic pole faces are the same; the two ends of the movable magnetizer are provided with movable pole faces, and the two movable pole faces face the two second magnetic pole faces respectively. When the magnetic latching magnetic circuit structure is in a latching state, one moving pole face is only in contact with one second magnetic pole face, and the other moving pole face is separated from the other second magnetic pole face. The coil assembly is fixedly arranged relative to the yoke and is configured to respond to an input signal to drive the movable magnetizer to move between the two permanent magnets.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control devices, 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 holding 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. SUMMARY

[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 iron surrounds a magnetic circuit space;

[0006] A magnetic assembly is arranged in the magnetic circuit space and comprises two permanent magnets arranged at intervals along a first direction and a movable magnetic conductor arranged movably between the two permanent magnets. The two permanent magnets are fixedly arranged relative to the yoke iron. The permanent magnets have first magnetic pole faces and second magnetic pole faces arranged oppositely. The two first magnetic pole faces are in contact with the inner annular face of the yoke iron. The two second magnetic pole faces are arranged face to face and have the same polarity. The movable magnetic conductor has movable pole faces at both ends along the first direction. The two movable pole faces face the two second magnetic pole faces respectively. When the magnetic holding magnetic circuit structure is in a holding state, one of the movable pole faces is in contact with one of the second magnetic pole faces, and the other movable pole face is separated from the other second magnetic pole face; and

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

[0008] According to some embodiments of the present application, the coil assembly surrounds an electromagnetic action space, and the magnetic gap is between the corresponding movable pole face and the second magnetic pole face. The two magnetic gaps are located in the electromagnetic action space.

[0009] 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.

[0010] The two magnetic gaps are located within the two subspaces, respectively.

[0011] According to some embodiments of this application, the two permanent magnets are fixedly connected to the yoke.

[0012] According to some embodiments of this application, the yoke comprises multiple parts, which are connected to form the magnetic circuit space.

[0013] According to some embodiments of this application, 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.

[0014] The two permanent magnets are respectively fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

[0015] 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.

[0016] The two permanent magnets are respectively fixedly connected to the surfaces of the two yoke plates facing each other.

[0017] 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.

[0018] The two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

[0019] 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.

[0020] The two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

[0021] According to some embodiments of this application, the first magnetic pole surface, the second magnetic pole surface, and the moving pole surface are all perpendicular to the first direction.

[0022] According to some embodiments of this application, the first projection and the second projection are circular, annular, or polygonal.

[0023] According to some embodiments of this application, in the corresponding second magnetic pole surface and the moving pole surface, the orthographic projection of the second magnetic pole surface on a target plane is a first projection, and the orthographic projection of the moving pole surface on the target plane is a 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.

[0024] The relays in this application include the magnetic latching circuit structure described in any of the preceding claims.

[0025] An embodiment of the above application has at least the following advantages or beneficial effects:

[0026] In the magnetic holding circuit structure of this application embodiment, the surface of the permanent magnet serves as the pole face. When the magnetic circuit structure is in the holding state, the moving magnetic conductor only contacts the permanent magnet and not 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 is energized, under the action of the reverse magnetic field provided by the coil assembly, the attraction force of the permanent magnet on the moving magnetic conductor at one end of the moving pole face will approach zero as the power of the coil assembly increases, while the attraction force at the moving pole face at the other end of the moving magnetic conductor will continuously increase. Therefore, in the magnetic holding circuit structure of this application embodiment, the switching speed of the moving magnetic conductor increases faster and faster as the power of the coil assembly increases. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a three-dimensional schematic diagram of the magnetic holding circuit structure of the first embodiment of this application.

[0029] Figure 2 yes Figure 1 A schematic diagram of direction A in the diagram.

[0030] Figure 3 This is an exploded schematic diagram of the magnetic holding circuit structure.

[0031] Figure 4 It is along Figure 2 A sectional view after being cut along the BB section line.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Figure 8 This is an exploded schematic diagram of the yoke of another embodiment of this application.

[0036] Figure 9 This is an exploded view of the yoke of another embodiment of this application.

[0037] Figure 10 This is an exploded view of the yoke of another embodiment of this application.

[0038] Figure 11 This is a top view of a relay according to an embodiment of this application.

[0039] Figure 12 It is along Figure 11 A sectional view after being cut along the CC section line.

[0040] The reference numerals in the attached figures are explained as follows:

[0041] 10. Magnetic holding magnetic circuit structure

[0042] 20. Drive components

[0043] 30. Moving parts

[0044] 40. Contact components

[0045] 100. Yoke

[0046] 100a, split

[0047] 101. Magnetic Circuit Space

[0048] 110. Yoke plate

[0049] 120. U-shaped yoke

[0050] 121. First board

[0051] 122. Second Board

[0052] 130. Yoke cylinder

[0053] 140. L-shaped yoke

[0054] 141. First paragraph

[0055] 142. Second paragraph

[0056] 200. Magnetic components

[0057] 210.Permanent magnet

[0058] 210a, First Permanent Magnet

[0059] 210b, Second Permanent Magnet

[0060] 211. First magnetic pole face

[0061] 212. Second magnetic pole face

[0062] 220. Moving magnet

[0063] 221. Moving electrode surface

[0064] 230. Magnetic gap

[0065] 300. Coil Assembly

[0066] 310. Electromagnetic interaction space

[0067] 311. Subspace

[0068] 320. Coil Unit

[0069] 320a, First Coil Unit

[0070] 320b, Second Coil Unit

[0071] D1, First Direction Detailed Implementation

[0072] 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.

[0073] 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.

[0074] like Figures 1 to 4 As shown, the magnetic holding 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. The permanent magnets 210 have a first magnetic pole surface 211 and a second magnetic pole surface 212 arranged opposite to each other. The two first magnetic pole surfaces 211 are in contact with the inner ring surface of the yoke 100, and the two second magnetic pole surfaces 212 are arranged face to face, and the polarities of the two second magnetic pole surfaces 212 are the same. The movable magnetic conductor 220 has movable pole surfaces 221 at both ends along the first direction D1, and the two movable pole surfaces 221 face the two second magnetic pole surfaces 212 respectively. When the magnetic circuit structure is in the holding state, one of the movable pole surfaces 221 is in contact with only one of the second magnetic pole surfaces 212, and the other movable pole surface 221 is separated from the other second magnetic pole surface 212. 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 moving magnet 220 to move between two permanent magnets in response to an input signal.

[0075] 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.

[0076] The moving magnetic conductor 220 is movable between a first position and a second position; when the moving magnetic conductor 220 is in one of the first position and the second position, one of the moving pole surfaces 221 is in contact with one of the second magnetic pole surfaces 212, and the other moving pole surface 221 is separated from the other second magnetic pole surface 212.

[0077] For ease of explanation, the two permanent magnets 210 are defined as the first permanent magnet 210a and the second permanent magnet 210b, respectively. The first permanent magnet 210a and the second permanent magnet 210b are arranged opposite each other along the first direction D1, and the polarity of their facing surfaces is the same, that is, the polarity of the second magnetic pole surface 212 of the first permanent magnet 210a and the second magnetic pole surface 212 of the second permanent magnet 210b is the same.

[0078] When the moving magnetic conductor 220 is in the first position, it 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, it is in contact with the second permanent magnet 210b and separated from the first permanent magnet 210a.

[0079] like Figure 4 As shown, 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 second magnetic pole surface 212. The two magnetic gaps 230 are located within the electromagnetic interaction space 310.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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 moving magnetic body 220 and surround the outer periphery of the two magnetic gaps 230.

[0084] like Figure 5 As shown, when the moving magnetic conductor 220 is positioned as indicated in the figure and the coil assembly 300 is not energized, the distance between the moving magnetic conductor 220 and the first permanent magnet 210a is relatively close, and the second magnetic pole surface 212 of the first permanent magnet 210a can provide a strong holding force to the moving magnetic conductor 220. Simultaneously, the distance between the moving magnetic conductor 220 and the second permanent magnet 210b is relatively large, and the polarities of the surfaces facing each other are the same, resulting in a weaker magnetic field on the second magnetic pole surface 212 of the second permanent magnet 210b. Consequently, the attractive force generated by the second permanent magnet 210b on the moving magnetic conductor 220 is very small. Therefore, the moving magnetic conductor 220 can be maintained in contact with the first permanent magnet 210a.

[0085] 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 allows the magnetic field generated by the first coil unit 320a to cancel out the magnetic field generated by the first permanent magnet 210a, thus reducing the attraction of the first permanent magnet 210a to the moving magnetic conductor 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 magnetic conductor 220. This design ensures that the attraction on the two moving pole surfaces 221 of the moving magnetic conductor 220 is "one increasing and one decreasing," enabling rapid switching of the moving magnetic conductor 220.

[0086] 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.

[0087] In this embodiment, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet 210 as the pole face. When the magnetic circuit structure is 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. The permanent magnet 210 provides sufficient attraction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, under the action of the reverse magnetic field provided by the coil assembly 300, the attraction of the permanent magnet to the moving magnetic conductor 220 at one end of the moving pole face 221 will tend to zero as the power of the coil assembly 300 increases, while the attraction of the moving pole face 221 at the other end of the moving magnetic conductor 220 will continuously increase. Therefore, in this embodiment, the switching speed of the moving magnetic conductor 220 in the magnetic holding magnetic circuit structure 10 increases with the increase of the power of the coil assembly 300.

[0088] like Figure 3 and Figure 4 As shown, two permanent magnets 210 are fixedly connected to the yoke 100.

[0089] 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.

[0090] 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.

[0091] In the embodiments of this application, the yoke 100 adopts a structure in which multiple separate parts 100a are connected end to end in sequence, which facilitates processing and assembly.

[0092] In other embodiments, the yoke 100 may also be a completely closed ring structure.

[0093] In one embodiment, the yoke 100 includes two separate parts 100a, one of which is a yoke plate 110, and the other is 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 arranged opposite to 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.

[0094] 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.

[0095] 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.

[0096] In one embodiment, in the corresponding second magnetic pole surface 212 and moving pole surface 221, the orthographic projection of the second magnetic pole surface 212 on a target plane is the first projection, and the orthographic projection of the moving pole surface 221 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 D1.

[0097] 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 moving magnetic conductor 220 only contacts the permanent magnet 210 and does not contact other components made of magnetic material.

[0098] 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 second magnetic pole surface 212, 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.

[0099] 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.

[0100] 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.

[0101] like Figure 7 As shown, the first projection and the second projection are circular.

[0102] 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.

[0103] In one embodiment, the moving magnetic conductor 220 is made of a high magnetic permeability material, such as pure iron, silicon steel sheet, etc.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] In one embodiment, adjacent yoke plates 110 can be connected by snap-fitting, welding or other means, and this application does not limit this.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] In one embodiment, the coil assembly 300 may be fixedly connected to the housing of the relay, but is not limited thereto.

[0117] 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:

[0118] The magnetic holding magnetic circuit structure 10 of this embodiment uses the surface of a permanent magnet as its pole face. When the magnetic circuit structure is in the holding state, the moving magnetic conductor 220 only contacts the permanent magnet 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, under the action of the reverse magnetic field provided by the coil assembly 300, the attraction of the permanent magnet to the moving magnetic conductor 220 at one end of the moving pole face 221 will tend to zero as the power of the coil assembly 300 increases, while the attraction of the moving pole face 221 at the other end of the moving magnetic conductor 220 will continuously increase. Therefore, as the power of the coil assembly 300 increases, the switching speed of the moving magnetic conductor 220 in the magnetic holding magnetic circuit structure 10 of this embodiment becomes faster and faster.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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. Each permanent magnet has a first magnetic pole face and a second magnetic pole face arranged opposite to each other. The two first magnetic pole faces are in contact with the inner ring surface of the yoke, and the two second magnetic pole faces are face-to-face with the same polarity. The movable magnetic conductor has movable pole faces at both ends along the first direction, and the two movable pole faces face the two second magnetic pole faces respectively. When the magnetic holding circuit structure is in a holding state, one of the movable pole faces is in contact with only one of the second magnetic pole faces, and the other movable pole face is separated from the other second magnetic pole face. as well as 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 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 coil assembly forms an electromagnetic interaction space, and there is a magnetic gap between the corresponding moving pole surface and the second magnetic pole surface. The two magnetic gaps are located within the electromagnetic interaction space.

3. The magnetic holding circuit structure according to claim 2, 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.

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

5. 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.

6. The magnetic holding circuit structure according to claim 5, 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 permanent magnets are respectively fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

7. The magnetic holding circuit structure according to claim 5, 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.

8. The magnetic holding circuit structure according to claim 5, 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.

9. The magnetic holding circuit structure according to claim 5, 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.

10. The magnetic holding circuit structure according to claim 1, characterized in that, The first magnetic pole surface, the second magnetic pole surface, and the moving pole surface are all perpendicular to the first direction.

11. The magnetic holding circuit structure according to claim 1, characterized in that, In the corresponding second magnetic pole surface and the moving pole surface, the orthographic projection of the second magnetic pole surface onto a target plane is the first projection, and the orthographic projection of the moving 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.

12. The magnetic holding circuit structure according to claim 11, characterized in that, The first projection and the second projection are circular, annular, or polygonal.

13. A relay, characterized in that, Includes the magnetic holding magnetic circuit structure as described in any one of claims 1-12.

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