Magnetic latching magnetic circuit structure and relay

Abstract

A magnetic latching magnetic circuit structure (10) and a relay. The magnetic circuit structure comprises a yoke (100), a magnetic assembly (200) and a coil assembly (300), wherein the yoke encloses a magnetic circuit space (101); the magnetic assembly is arranged in the magnetic circuit space and comprises two permanent magnets (210) arranged spaced apart from each other and a movable magnetic conductor (220) movably arranged between the two permanent magnets; the two permanent magnets are fixedly arranged relative to the yoke, two first magnetic pole faces (210) of the permanent magnets are in contact with the inner ring face of the yoke, two second magnetic pole faces (212) thereof are arranged opposite each other, and the two second magnetic pole faces have the same polarity; the movable magnetic conductor is provided with movable pole faces (221) at two ends, and the two movable pole faces respectively face the two second magnetic pole faces; when the magnetic latching magnetic circuit structure is in a latching state, one movable pole face is in contact with only one second magnetic pole face, and the other movable pole face is separated from the other second magnetic pole face; and the coil assembly is fixedly arranged relative to the yoke and is configured to drive, in response to an input signal, the movable magnet conductor to move between the two permanent magnets. The magnetic latching magnetic circuit structure has a good anti-vibration performance and reliability; and as the power of the coil assembly increases, the switching speed of the movable magnetic conductor is increased.

Description

Magnetic latching circuit structure and relay

[0001] This application claims priority to Chinese patent application CN202510351751.6, entitled "Magnetic Holding Magnetic Circuit Structure and Relay", filed on March 24, 2025; and Chinese patent application CN202510351666.X, entitled "Magnetic Holding Magnetic Circuit Structure and Relay", filed on March 24, 2025; and Chinese patent application CN202510351739.5, entitled "Magnetic Holding Magnetic Circuit Structure and Relay", filed on March 24, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] 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

[0003] 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. Summary of the Invention

[0004] This application provides a magnetic latching circuit structure and a relay to solve the problem of untimely switching action in related technologies.

[0005] The magnetic holding magnetic circuit structure of this application embodiment includes: a yoke forming a magnetic circuit space; a magnetic component disposed within the magnetic circuit space, including 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 having a first magnetic pole face and a second magnetic pole face facing away from 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 respectively face the two second magnetic pole faces; when the magnetic holding magnetic 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; and

[0006] 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.

[0007] According to some embodiments of this application, 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, with the two magnetic gaps located within the electromagnetic interaction space.

[0008] According to some embodiments of this application, the coil assembly includes two coil units, the electromagnetic interaction space has two subspaces, and one coil unit encloses one of the subspaces; the two magnetic gaps are respectively located within the two subspaces.

[0009] According to some embodiments of this application, the two permanent magnets are fixedly connected to the yoke.

[0010] According to some embodiments of this application, the yoke comprises multiple parts, which are connected to form the magnetic circuit space.

[0011] 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. The two permanent magnets are fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

[0012] 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. The two yoke plates are respectively connected to the two axial ends of the yoke cylinder and respectively cover 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.

[0013] According to some embodiments of this application, the yoke includes two separate parts, each of which is an L-shaped yoke, and the two L-shaped yokes are connected end to end to form a rectangular frame; wherein, the two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

[0014] According to some embodiments of this application, 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; wherein, two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

[0015] 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.

[0016] According to some embodiments of this application, the first projection and the second projection are circular, annular, or polygonal.

[0017] 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.

[0018] According to another aspect of this application, a magnetic holding magnetic circuit structure is provided, comprising: a yoke forming a magnetic circuit space; a magnetic assembly disposed within the magnetic circuit space, including 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 a coil assembly fixedly sleeved on the outer periphery of the movable magnetic conductor, the coil assembly being configured to drive the movable magnetic conductor to move between the two permanent magnets in response to an input signal.

[0019] 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. In the corresponding moving pole surface and the first magnetic pole surface, the orthographic projection of the first magnetic pole surface on a target plane is a first projection, 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.

[0020] 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. 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.

[0021] 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.

[0022] According to some embodiments of this application, the coil assembly includes two coil units, the electromagnetic interaction space has two subspaces, and one coil unit encloses one of the subspaces; the two magnetic gaps are respectively located within the two subspaces.

[0023] 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.

[0024] According to some embodiments of this application, the movable magnetic conductor is movable between a first position and a second position; the two permanent magnets are respectively defined as a first permanent magnet and a second permanent magnet, and the two subspaces are respectively defined as a first subspace and a second subspace; when the movable magnetic conductor is located in the first position, the movable 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 movable magnetic conductor is located in the second position, the movable 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.

[0025] According to some embodiments of this application, the two permanent magnets are fixedly connected to the yoke.

[0026] According to some embodiments of this application, the yoke comprises multiple parts, which are connected to form the magnetic circuit space.

[0027] 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. The two permanent magnets are fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

[0028] 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. The two yoke plates are respectively connected to the two axial ends of the yoke cylinder and respectively cover 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.

[0029] According to some embodiments of this application, the yoke includes two separate parts, each of which is an L-shaped yoke, and the two L-shaped yokes are connected end to end to form a rectangular frame; wherein, the two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

[0030] According to some embodiments of this application, 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; wherein, two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

[0031] 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.

[0032] According to some embodiments of this application, the first projection and the second projection are circular, annular, or polygonal.

[0033] According to another aspect of this application, a magnetic holding magnetic circuit structure is provided, comprising: a yoke forming a magnetic circuit space; a magnetic assembly disposed within the magnetic circuit space, including 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 being fixedly disposed relative to the yoke, the movable member including a moving magnetic conductor and two permanent magnets, the two permanent magnets being respectively connected to the two ends of the moving magnetic conductor along the first direction, the two permanent magnets having first magnetic pole surfaces facing the two stationary magnetic conductors respectively, the two first magnetic pole surfaces having the same polarity; and a coil assembly fixedly disposed relative to the yoke and surrounding the outer periphery of the magnetic assembly; the coil assembly being configured to drive the movable member to move between the two stationary magnetic conductors in response to an input signal.

[0034] According to some embodiments of this application, the two static magnetic conductors have static pole surfaces that face 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 on a target plane is a first projection, and the orthographic projection of the static 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; wherein, the target plane is perpendicular to the first direction.

[0035] According to some embodiments of this application, the two static magnetic conductors have static pole surfaces that face the two permanent magnets respectively; when the magnetic holding circuit structure is in the holding state, one of the static pole surfaces is in contact with only one of the first magnetic pole surfaces, and the other static pole surface is separated from the other first magnetic pole surface.

[0036] According to some embodiments of this application, the two static magnetic conductors have static pole surfaces that face the two permanent magnets respectively, and 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.

[0037] According to some embodiments of this application, the coil assembly includes two coil units, the electromagnetic interaction space has two subspaces, and one coil unit encloses one of the subspaces; the two magnetic gaps are respectively located within the two subspaces.

[0038] According to some embodiments of this application, the two static magnets are fixedly connected to the yoke.

[0039] According to some embodiments of this application, the yoke comprises multiple parts, which are connected to form the magnetic circuit space.

[0040] 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. The two static magnetic conductors are fixedly connected to the surfaces of the first plate and the yoke plate facing each other.

[0041] 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. The two yoke plates are respectively connected to the two axial ends of the yoke cylinder and respectively cover the two openings of the yoke cylinder. The two static magnetic conductors are respectively fixedly connected to the surfaces of the two yoke plates facing each other.

[0042] According to some embodiments of this application, the yoke includes two separate parts, each of which is an L-shaped yoke, and the two L-shaped yokes are connected end to end to form a rectangular frame; wherein, the two static magnetic conductors are respectively fixedly connected to the two L-shaped yokes.

[0043] According to some embodiments of this application, 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; wherein, two static magnetic conductors are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates.

[0044] According to some embodiments of this application, 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.

[0045] According to some embodiments of this application, the first projection and the second projection are circular, annular, or polygonal.

[0046] The relays in this application include the magnetic latching circuit structure described in any of the preceding claims.

[0047] An embodiment of the above application has at least the following advantages or beneficial effects:

[0048] 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

[0049] 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.

[0050] Figure 1 is a three-dimensional schematic diagram of the magnetic holding circuit structure of the first embodiment of this application.

[0051] Figure 2 is a schematic diagram of direction A in Figure 1.

[0052] Figure 3 is an exploded schematic diagram of the magnetic holding circuit structure.

[0053] Figure 4 is a cross-sectional view after being cut along the BB section line in Figure 2.

[0054] Figure 5 is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure according to an embodiment of this application.

[0055] Figure 6 is a schematic diagram of the permanent magnet, the moving magnetic conductor, and the coil unit in the magnetic holding magnetic circuit structure of the second embodiment of this application.

[0056] Figure 7 is a schematic diagram of the permanent magnet, the moving magnetic conductor, and the coil unit in the magnetic holding magnetic circuit structure of the third embodiment of this application.

[0057] Figure 8 is an exploded view of the yoke of another embodiment of this application.

[0058] Figure 9 is an exploded schematic diagram of the yoke of another embodiment of this application.

[0059] Figure 10 is an exploded view of the yoke of another embodiment of this application.

[0060] Figure 11 is a top view of a relay according to an embodiment of this application.

[0061] Figure 12 is a cross-sectional view after being cut along the CC section line in Figure 11.

[0062] Figure 13 is a perspective view of a magnetic holding circuit structure according to another embodiment of this application.

[0063] Figure 14 is a schematic diagram of direction A in Figure 1.

[0064] Figure 15 is an exploded schematic diagram of the magnetic holding circuit structure.

[0065] Figure 16 is a sectional view after being cut along the BB section line in Figure 13.

[0066] Figure 17 is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure according to an embodiment of this application.

[0067] Figure 18 is a top view of a relay according to an embodiment of this application.

[0068] Figure 19 is a sectional view after being cut along the CC section line in Figure 18.

[0069] Figure 20 is a perspective view of a magnetic holding circuit structure according to another embodiment of this application.

[0070] Figure 21 is a schematic diagram of direction A in Figure 20.

[0071] Figure 22 is an exploded schematic diagram of the magnetic holding circuit structure.

[0072] Figure 23 is a sectional view after being cut along the BB section line in Figure 20.

[0073] Figure 24 is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure according to an embodiment of this application.

[0074] Figure 25 is a schematic diagram of the permanent magnet, the moving magnetic conductor, and the coil unit in a magnetic holding magnetic circuit structure according to another embodiment of this application.

[0075] Figure 26 is a schematic diagram of the permanent magnet, the moving magnetic conductor, and the coil unit in a magnetic holding magnetic circuit structure according to another embodiment of this application.

[0076] Figure 27 is a top view of a relay according to an exemplary embodiment of this application.

[0077] Figure 28 is a sectional view after being cut along the CC section line in Figure 27.

[0078] The reference numerals in the attached drawings are explained as follows: 10, Magnetic holding magnetic circuit structure 10', Magnetic holding magnetic circuit structure 10”, Magnetic holding magnetic circuit structure 20, Driving component 30, Moving component 40, Contact assembly 100, Yoke 100a, Split body 101, Magnetic circuit space 110, Yoke plate 120, U-shaped yoke 121, First plate 122, Second plate 130, Yoke cylinder 140, L-shaped yoke 141, First section 142, Second section 200, Magnetic assembly 210, Permanent magnet 210a, First permanent magnet 210b, Second permanent magnet 211, First magnetic pole surface 212, Second magnetic pole surface 220, Moving magnetic conductor 221, Moving pole surface 230, Magnetic gap 1200, Magnetic assembly 1210, Static magnetic conductor 1211, Static pole surface 1210a, First static magnetic conductor 1210b, and so on. Two static magnetic conductors 1220, movable component 1221, moving magnetic conductor 1222, permanent magnet 1222a, first permanent magnet 1222b, second permanent magnet 1223, first magnetic pole surface 1224, second magnetic pole surface 1230, magnetic gap 300, coil assembly 300', coil assembly 310, electromagnetic interaction space 311, subspace 311a, first subspace 311b, second subspace 1311, subspace 1311a, first subspace 1311b, second subspace 320, coil unit 320a, first coil unit 320b, second coil unit 1320, coil unit 1320a, first coil unit 1320b, second coil unit 1321, coil frame 1322, coil D1, first direction. Detailed Implementation

[0079] 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.

[0080] 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.

[0081] As shown in Figures 1 to 4, an exemplary embodiment of the present application provides a magnetic holding circuit structure 10, which 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] As shown in Figure 4, 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] As shown in Figure 5, when the moving magnetic conductor 220 is in the position shown 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] As shown in Figures 3 and 4, two permanent magnets 210 are fixedly connected to the yoke 100.

[0096] 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.

[0097] As shown in Figures 3 and 4, the yoke 100 may include multiple parts 100a, which are connected end to end to form a magnetic circuit space 101.

[0098] 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.

[0099] In other embodiments, the yoke 100 may also be a completely closed ring structure.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] In one embodiment, both the first projection and the second projection can be circular, that is, both the moving magnetic conductor 220 and the permanent magnet are cylindrical.

[0107] In other embodiments, both the first projection and the second projection can be polygons. As shown in Figure 6, the first projection and the second projection are polygons (with chamfers and / or rounded edges), that is, the moving magnetic conductor 220 and the permanent magnet are prisms. For example, triangular prisms, quadrangular prisms, and pentagonal prisms.

[0108] In other embodiments, both the first projection and the second projection can be annular. As shown in Figure 7, the first projection and the second projection are annular.

[0109] 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.

[0110] In one embodiment, the moving magnetic conductor 220 is made of a high magnetic permeability material, such as pure iron, silicon steel sheet, etc.

[0111] As shown in Figure 8, 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.

[0112] 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.

[0113] In one embodiment, as shown in FIG9, the yoke 100 may include two parts, each part being an L-shaped yoke 140, and the two L-shaped yokes 140 are connected end to end to form a rectangular frame; wherein, the two permanent magnets 210 shown in any of the embodiments in FIG3, FIG4, FIG6 and FIG7 can be fixedly connected to the two L-shaped yokes 140 respectively.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] In one embodiment, as shown in FIG10, the yoke 100 may include four parts, each part being a yoke plate 110, and the four yoke plates 110 are connected end to end to form a rectangular frame; wherein, the two permanent magnets 210 shown in any of the embodiments in FIG3, FIG4, FIG6 and FIG7 can be fixedly connected to the surfaces of any two oppositely arranged yoke plates 110.

[0119] In one embodiment, adjacent yoke plates 110 can be connected by snap-fitting, welding or other means, and this application does not limit this.

[0120] 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.

[0121] As shown in Figures 11 and 12, another aspect of this application also provides a relay, including the magnetic holding circuit structure 10 of any of the above embodiments.

[0122] 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.

[0123] In one embodiment, the coil assembly 300 may be fixedly connected to the housing of the relay, but is not limited thereto.

[0124] 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:

[0125] 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.

[0126] As shown in Figures 13 to 16, another exemplary embodiment of the present application discloses a magnetic circuit structure 10', including 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 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.

[0127] 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.

[0128] 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 applied to 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] As shown in Figures 15 and 16, 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.

[0135] 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.

[0136] Of course, in other embodiments, the two magnetic gaps 320 may also be located outside the electromagnetic interaction space 310.

[0137] In one embodiment, the coil assembly 300' may include two coil units 1320, the electromagnetic action space 310 has two subspaces 1311, and one coil unit 1320 surrounds one subspace 1311; two magnetic gaps 230 are respectively located in the two subspaces 1311.

[0138] In the embodiments of this application, two coil units 1320 are respectively wrapped around the outer periphery of two magnetic gaps 230, so that the length of each coil unit 1320 along the first direction D1 does not need to be designed to be too long, thus saving material costs.

[0139] 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.

[0140] The two coil units 1320 are defined as the first coil unit 1320a and the second coil unit 1320b, respectively. The two subspaces 1311 are defined as the first subspace 1311a and the second subspace 1311b, respectively. The first coil unit 1320a forms the first subspace 1311a, and the second coil unit 1320b forms the second subspace 1311b.

[0141] Each coil unit 1320 includes a coil frame 1321 and a coil 1322. The coil frame 1321 is fixedly sleeved on the outer periphery of the moving magnetic body 220, and the coil 1322 is wound around the outer periphery of the coil frame 1321.

[0142] As an example, the connection between the coil frame 1321 and the moving magnetic body 1220 can be by interference fit, welding, gluing, etc., and this application does not limit this.

[0143] As shown in Figure 17, when the moving magnetic conductor 220 is in the position shown (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.

[0144] When both coil units 1320 are energized in the same direction, the magnetic field generated by the first coil unit 1320a 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 1320b 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.

[0145] Simultaneously, when the first coil unit 1320a 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 1320a 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 1320b 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 1320b is much weaker than the magnetic field strength of the first permanent magnet 210a acting on the first coil unit 1320a, 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.

[0146] 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.

[0147] As shown in Figures 16 and 17, when the moving magnet 220 is in the first position, it 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 1311a, and the entire second permanent magnet 210b is located outside the second subspace 1311b. When the moving magnet 220 is in the second position, it 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 1311b, and the entire first permanent magnet 210a is located outside the first subspace 1311a.

[0148] 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 1311a, and the entire second permanent magnet 210b is located outside the second subspace 1311b. This makes the magnetic field strength of the first coil unit 1320a from the first permanent magnet 210a significantly weaker than that of the second coil unit 1320b from the second permanent magnet 210b. Consequently, the Lorentz force exerted on the first coil unit 1320a by the first permanent magnet 210a is greater than that exerted on the second coil unit 1320b 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.

[0149] 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 1311b, while the entire first permanent magnet 210a is located outside the first subspace 1311a. 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.

[0150] 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.

[0151] 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 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 where the holding attraction becomes zero and then immediately rises again, which significantly improves the switching speed of the moving magnetic conductor 220.

[0152] In some embodiments, the connection method between the two permanent magnets 210 and the yoke 100 can be referred to Figures 3 and 4.

[0153] In some embodiments, exemplary implementations of the yoke 100 may be referred to Figures 8, 9 and 10.

[0154] As shown in Figures 18 and 19, another aspect of this application also provides a relay including the magnetic holding circuit structure 10' of any of the above embodiments.

[0155] 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.

[0156] 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:

[0157] The magnetic holding circuit structure 10' of this embodiment includes two permanent magnets, a moving magnetic conductor 220, and a coil assembly 300'. The moving 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 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 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 220 is significantly improved, and the switching time of the moving magnetic conductor 220 is shortened.

[0158] 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.

[0159] As shown in Figures 20 to 23, a magnetic circuit structure 10” of another exemplary embodiment of this application includes a yoke 100, a magnetic assembly 1200, and a coil assembly 300. The yoke 100 encloses a magnetic circuit space 101; the magnetic assembly 1200 is disposed within the magnetic circuit space 101 and includes two stationary magnetic conductors 1210 spaced apart along a first direction D1 and a movable member 1220 movably disposed between the two stationary magnetic conductors 1210. The two stationary magnetic conductors 1210 are fixedly disposed relative to the yoke 100, and the movable member 1220 includes a moving magnetic conductor 1221 and two permanent magnets 1222. Two permanent magnets 1222 are respectively connected to the two ends of the moving magnetic body 1221 along the first direction D1. Two stationary magnetic bodies 1210 have stationary pole surfaces 1211 facing the two permanent magnets 1222 respectively, and the two permanent magnets 1222 have first magnetic pole surfaces 1223 facing the two stationary magnetic bodies 1210 respectively, with the two first magnetic pole surfaces 1223 having the same polarity. A coil assembly 300 is fixedly disposed relative to the yoke 100 and surrounds the outer periphery of the magnetic assembly 1200; the coil assembly 300 is configured to drive the movable member 1220 to move between the two stationary magnetic bodies 1210 in response to an input signal.

[0160] Among them, permanent magnet 1222 is a material that can spontaneously generate a magnetic field and maintain its magnetism for a long time without relying on external current.

[0161] The moving magnetic conductor 1221 and the stationary magnetic conductor 1210 are made of magnetically conductive materials. These materials include, but are not limited to, iron, silicon steel, and soft magnetic alloys.

[0162] In one embodiment, two permanent magnets 1222 are respectively fixedly installed at both ends of the movable magnetic conductor 1221 along the first direction D1. The permanent magnets 1222 and the movable magnetic conductor 1221 can be installed by riveting, welding, gluing, interference fit, etc., and this application does not limit the method.

[0163] Each permanent magnet 1222 also has a second magnetic pole surface 1224. The first magnetic pole surface 1223 and the second magnetic pole surface 1224 of each permanent magnet 1222 are arranged opposite to each other along the first direction D1 and have opposite polarities.

[0164] The movable member 1220 is movable between a first position and a second position; when the movable member 1220 is in one of the first position and the second position, one of the stationary pole surfaces 1211 is in contact with one of the first magnetic pole surfaces 1223, and the other stationary pole surface 1211 is separated from the other first magnetic pole surface 1223.

[0165] For ease of explanation, the two permanent magnets 1222 are defined as the first permanent magnet 1222a and the second permanent magnet 1222b, respectively, and the two static magnetic conductors 1210 are defined as the first static magnetic conductor 1210a and the second static magnetic conductor 1210b, respectively. The first permanent magnet 1222a and the first static magnetic conductor 1210a are arranged opposite each other along the first direction D1, and the second permanent magnet 1222b and the second static magnetic conductor 1210b are arranged opposite each other along the first direction D1. The first permanent magnet 1222a and the second permanent magnet 1222b are respectively connected to the two ends of the moving magnetic conductor 1221 along the first direction D1, and the polarities of the opposite surfaces of the first permanent magnet 1222a and the second permanent magnet 1222b along the first direction D1 are the same, that is, the polarities of the first magnetic pole surface 1223 of the first permanent magnet 1222a and the first magnetic pole surface 1223 of the second permanent magnet 1222b are the same.

[0166] When the movable member 1220 is in the first position, the stationary pole surface 1211 of the first stationary magnet 1210a is in contact with the first magnetic pole surface 1223 of the first permanent magnet 1222a, and the stationary pole surface 1211 of the second stationary magnet 1210b is separated from the first magnetic pole surface 1223 of the second permanent magnet 1222b. When the movable member 1220 is in the second position, the stationary pole surface 1211 of the second stationary magnet 1210b is in contact with the first magnetic pole surface 1223 of the second permanent magnet 1222b, and the stationary pole surface 1211 of the first stationary magnet 1210a is separated from the first magnetic pole surface 1223 of the first permanent magnet 1222a.

[0167] As shown in Figures 22 and 23, the coil assembly 300 forms an electromagnetic interaction space 310, and a magnetic gap 1230 is formed between the corresponding stationary pole surface 1211 and the first magnetic pole surface 1223. Both magnetic gaps 1230 are located within the electromagnetic interaction space 310.

[0168] Of course, in other embodiments, the two magnetic gaps 1230 may also be located outside the electromagnetic action space 310 of the coil assembly 300.

[0169] 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 1230 are respectively located within the two subspaces 311. 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 1230, and the second coil unit 320b surrounds the outer periphery of the other magnetic gap 1230.

[0170] 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.

[0171] 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 1220, and the coil assembly 300 surrounds the outer periphery of the two magnetic gaps 1230.

[0172] As shown in Figure 24, when the movable member 1220 is in the position shown (first position) and the coil assembly 300 is not energized, the distance between the first stationary magnet 1210a and the first permanent magnet 1222a is relatively close, and the first permanent magnet 1222a and the first stationary magnet 1210a will generate an attractive force. That is, the first permanent magnet 1222a can provide a strong holding force to the movable member 1220 to keep the movable member 1220 in the first position. At the same time, since the distance between the second stationary magnet 1210b and the second permanent magnet 1222b is relatively far, the attractive force generated between the second permanent magnet 1222b and the second stationary magnet 1210b is very small. Therefore, the movable member 1220 can be kept in the first position, that is, the first permanent magnet 1222a is in contact with the first stationary magnet 1210a, while the second permanent magnet 1222b is separated from the second stationary magnet 1210b.

[0173] It should be noted that when the movable member 1220 is held in the first position, the first permanent magnet 1222a is in contact with the first static magnet 1210a, which magnetizes the first static magnet 1210a and generates a first magnetic field M1.

[0174] 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 cancels 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 1210a generates a third magnetic field M3 under the influence of the second magnetic field M2. However, the magnetic field of the first permanent magnet 1222a is not easily canceled out by the second magnetic field M2, so the first permanent magnet 1222a retains 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 1222a. At this point, a repulsive force is generated between the first stationary magnet 1210a and the first permanent magnet 1222a. 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 1210b 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 1222b. Therefore, an attractive force will be generated between the second static magnetic conductor 1210b and the second permanent magnet 1222b.

[0175] Therefore, when the first coil unit 320a and the second coil unit 320b are energized in the same direction, the movable member 1220 is simultaneously subjected to a repulsive force from the first stationary magnet 1210a and an attractive force from the second stationary magnet 1210b. Since the repulsive and attractive forces are in the same direction, the movable member 1220 tends to move towards the second position. Under the combined action of the repulsive and attractive forces, the driving force for the movable member 1220 to switch from the first position to the second position is greater, and the switching speed is faster.

[0176] Therefore, the magnetic holding magnetic circuit structure of this application embodiment includes two static magnetic conductors 1210 and a movable member 1220 movably disposed between the two static magnetic conductors 1210. The movable member 1220 includes a moving magnetic conductor 1221 and two permanent magnets 1222 respectively disposed at both ends of the moving magnetic conductor 1221. Since the first magnetic pole surfaces 1223 of the two permanent magnets 1222 have the same polarity, when the coil assembly 300 is energized and drives the movable member 1220 to move, the movable member 1220 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 1220 is faster, thereby improving the switching speed of the movable member 1220.

[0177] In one embodiment, when the magnetic holding magnetic circuit structure is in the holding state, one of the stationary pole surfaces 1211 is in contact with only one of the first magnetic pole surfaces 1223, while the other stationary pole surface 1211 is separated from the other first magnetic pole surface 1223.

[0178] 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.

[0179] In this embodiment, the magnetic holding magnetic circuit structure 10” uses the surface of the permanent magnet 1222 as the pole surface. When the magnetic circuit structure is in the holding state, one of the static magnetic conductors 1210 is in contact with only one of the permanent magnets 1222 and does not contact other components made of magnetically conductive material. The permanent magnet 1222 provides sufficient attraction to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, since the static magnetic conductor 1210 is in contact with only the permanent magnet 1222 and not with other components made of magnetically conductive material, the magnetic field of other components will not be canceled by the magnetic field generated by the energization of the coil assembly 300, and then the magnetic field of other components will immediately change to the opposite magnetic field. Therefore, the problem of the holding attraction becoming zero and then immediately rising again will not occur, which significantly improves the switching speed of the movable component 1220.

[0180] As shown in Figures 22 and 23, two stationary magnets 1210 are fixedly connected to the yoke 100.

[0181] Of course, in other embodiments, when the magnetic holding magnetic circuit structure 10” is installed in the relay, the two stationary magnets 1210 can also be fixedly connected to other components of the relay to ensure that the two stationary magnets 1210 are in contact with the yoke 100.

[0182] In some embodiments, exemplary implementations of the yoke 100 can be seen with reference to Figures 8, 9, and 10. For example, in Figure 8, two stationary magnets 1210 can be fixedly connected to the facing surfaces of two yoke plates 110, respectively. As another example, in Figure 9, two stationary magnets 1210 can be fixedly connected to two L-shaped yokes 140; the two stationary magnets 1210 can be fixedly connected to the facing surfaces of two first segments 141, or they can be fixedly connected to the facing surfaces of two second segments 142. Yet another example, in Figure 10, two stationary magnets 1210 can be fixedly connected to the surfaces of any two opposing yoke plates 110.

[0183] In one embodiment, the first magnetic pole surface 1223, the second magnetic pole surface 1224, and the stationary pole surface 1211 are all perpendicular to the first direction D1.

[0184] Of course, in other embodiments, the first magnetic pole surface 1223, the second magnetic pole surface 1224 and the stationary pole surface 1211 may not be perpendicular to the first direction D1.

[0185] In one embodiment, in the corresponding first magnetic pole surface 1223 and stationary pole surface 1211, the orthographic projection of the first magnetic pole surface 1223 onto a target plane is the first projection, and the orthographic projection of the stationary pole surface 1211 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.

[0186] 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 1210 only contacts the permanent magnet 1222 and does not contact other components made of magnetic materials.

[0187] 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 1211 extends beyond the edge of the first magnetic pole surface 1223, as long as a sufficiently large gap is maintained between other components made of magnetically conductive material and the stationary pole surface 1211, the influence of other components made of magnetically conductive material on the switching action of the movable member 1220 can be reduced.

[0188] In one embodiment, the first projection and the second projection are circular, that is, both the static magnet 1210 and the permanent magnet 1222 are cylinders.

[0189] As shown in Figure 25, the first and second projections can be polygons, i.e., the static magnet 1210 and the permanent magnet 1222 can be prisms. For example, triangular prisms, quadrangular prisms, and pentagonal prisms.

[0190] As shown in Figure 26, the first projection and the second projection can be circular.

[0191] Of course, it is understandable that the shapes of the static magnet 1210 and the permanent magnet 1222 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 1210 can be a cylinder, and the permanent magnet 1222 can be a prism.

[0192] As shown in Figures 27 and 28, another aspect of this application also provides a relay including the magnetic holding circuit structure 10 of any of the above embodiments.

[0193] 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 member 1220, for example, the drive element 20 is connected to the moving magnet 1221, 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.

[0194] In one embodiment, the coil assembly 300 may be fixedly connected to the housing of the relay, but is not limited thereto.

[0195] 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:

[0196] The magnetic holding magnetic circuit structure of this application embodiment includes two stationary magnetic conductors 1210 and a movable member 1220 movably disposed between the two stationary magnetic conductors 1210. The movable member 1220 includes a moving magnetic conductor 1221 and two permanent magnets 1222 disposed at both ends of the moving magnetic conductor 1221. Since the first magnetic pole surfaces 1223 of the two permanent magnets 1222 have the same polarity, when the coil assembly 300 is energized and drives the movable member 1220 to move, the movable member 1220 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 1220 is faster, thereby improving the switching speed of the movable member 1220.

[0197] Furthermore, the magnetic holding magnetic circuit structure 10” uses the surface of the permanent magnet 1222 as the pole face. When the magnetic circuit structure is in the holding state, one of the stationary magnetic conductors 1210 is in contact with only one of the permanent magnets 1222 and does not contact other components made of magnetically conductive material. The permanent magnet 1222 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 1210 is in contact with only the permanent magnet 1222 and not with other components made of magnetically conductive material, the magnetic field of other components will not be canceled by the magnetic field generated by the energization of the coil assembly 300, and then the magnetic field of other components will immediately change to the opposite magnetic field. Therefore, the problem of the holding attraction force becoming zero and then immediately rising again will not occur, which significantly improves the switching speed of the movable component 1220.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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, wherein, 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, wherein, 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, wherein, 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, wherein, The two permanent magnets are fixedly connected to the yoke.

5. The magnetic holding circuit structure according to claim 1, wherein, The yoke comprises multiple parts, which are connected to form the magnetic circuit space.

6. The magnetic holding circuit structure according to claim 5, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, The first projection and the second projection are circular, annular, or polygonal.

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

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