Magnetic latching magnetic circuit structure and relay

Abstract

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

Description

Technical Field

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

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

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

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

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

[0006] A magnetic component is arranged in the magnetic circuit space, and includes two permanent magnets arranged at intervals along a first direction and a moving magnet movably arranged between the two permanent magnets, the two permanent magnets are fixedly arranged relative to the yoke, the permanent magnets have first magnetic pole faces and second magnetic pole faces arranged opposite to each other, the two first magnetic pole faces are in contact with the inner ring surface of the yoke, the two second magnetic pole faces are arranged face to face, and the polarities of the two second magnetic pole faces are the same; the moving magnet has moving pole faces at both ends along the first direction, and the two moving pole faces face the two second magnetic pole faces respectively; when the magnetic holding magnetic circuit structure is in a holding state, one of the moving pole faces is in contact with only one of the second magnetic pole faces, and the other moving pole face is separated from the other second magnetic pole face; and

[0007] The coil component is fixedly arranged relative to the yoke and surrounds the outer periphery of the magnetic component; the coil component is configured to drive the moving magnet to move between the two permanent magnets in response to an input signal.

[0008] According to some embodiments of the present application, the coil assembly encloses an electromagnetic action space, a magnetic gap is formed between the corresponding moving pole surface and the second magnetic pole surface, and the two magnetic gaps are located in the electromagnetic action space.

[0009] According to some embodiments of the present application, the coil assembly includes two coil units, the electromagnetic action space has two subspaces, and one coil unit encloses one subspace;

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

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

[0012] According to some embodiments of the present application, the yoke includes a plurality of separate bodies, and the plurality of separate bodies are connected to form the magnetic circuit space.

[0013] According to some embodiments of the present application, the yoke includes two split bodies, one of which is a yoke plate and the other is a U-shaped yoke, the U-shaped yoke includes a first plate and two second plates, the first plate and the yoke plate are arranged opposite to each other in the first direction, and the magnetic component is located between the first plate and the yoke plate, one end of the two second plates are respectively connected to the two ends of the first plate, and the other ends of the two second plates are respectively connected to the two ends of the yoke plate;

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

[0015] According to some embodiments of the present application, the yoke includes three parts, two of which are yoke plates, and the other part is a yoke cylinder, the yoke cylinder has openings at both axial ends, and the two yoke plates are respectively connected to the axial ends of the yoke cylinder and cover the two openings of the yoke cylinder respectively;

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

[0017] According to some embodiments of the present application, the yoke includes two split bodies, each of which is an L-shaped yoke, and the two L-shaped yokes are sequentially connected end to end to form a rectangular frame;

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

[0019] According to some embodiments of the present application, the yoke includes four parts, each of which is a yoke plate, and the four yoke plates are sequentially connected end to end to form a rectangular frame;

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

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

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

[0023] According to some embodiments of the present 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, the orthographic projection of the moving pole surface on the target plane is a second projection, the second projection coincides with the first projection or the second projection falls within the first projection; the target plane is perpendicular to the first direction.

[0024] The relay of the embodiment of the present application includes any of the magnetic latching magnetic circuit structures described above.

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

[0026] The magnetic holding magnetic circuit structure of the embodiment of the present application uses the surface of the permanent magnet as the pole face. When the magnetic circuit structure is in a holding state, the moving magnet is only in contact with the permanent magnet and not in contact with other parts made of magnetic conductive materials. The permanent magnet provides sufficient suction force to ensure the vibration resistance and reliability of the magnetic circuit structure. When the coil assembly is energized, the moving pole face at one end of the moving magnet is under the action of the reverse magnetic field provided by the coil assembly. The suction force of the permanent magnet on the moving magnet will tend to zero as the power of the coil assembly increases, while the suction force of the moving pole face at the other end of the moving magnet will continue to increase. Therefore, as the power of the coil assembly increases, the switching speed of the moving magnet of the magnetic holding magnetic circuit structure of the embodiment of the present application becomes faster and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0028] Figure 1 It is a three-dimensional schematic diagram of the magnetic retaining magnetic circuit structure of the first embodiment of the present application.

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

[0030] Figure 3 It is a schematic diagram of the decomposition of the magnetic holding magnetic circuit structure.

[0031] Figure 4 is along Figure 2 Sectional view after cutting along the BB cutting line.

[0032] Figure 5 It is a schematic diagram of the magnetic field direction of the magnetic holding magnetic circuit structure of an embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of the permanent magnet, the moving magnet and the coil unit in the magnetic retaining magnetic circuit structure of the second embodiment of the present application.

[0034] Figure 7 It is a schematic diagram of the permanent magnet, the moving magnet and the coil unit in the magnetic retaining magnetic circuit structure of the third embodiment of the present application.

[0035] Figure 8 It is a schematic diagram of an exploded view of a yoke according to another embodiment of the present application.

[0036] Fig. 9 It is a schematic diagram of an exploded view of a yoke according to another embodiment of the present application.

[0037] Fig.10 It is a schematic diagram of an exploded view of a yoke according to yet another embodiment of the present application.

[0038] Fig.11 It is a schematic top view of the relay according to an embodiment of the present application.

[0039] Fig.12 is along Fig.11 Sectional view after cutting along the CC cutting line.

[0040] The reference numerals are described as follows:

[0041] 10. Magnetic holding magnetic circuit structure

[0042] 20. Driving parts

[0043] 30. Moving parts

[0044] 40. Contact components

[0045] 100. Yoke

[0046] 100a, split

[0047] 101. Magnetic Circuit Space

[0048] 110. Yoke iron plate

[0049] 120. U-shaped yoke

[0050] 121. First Board

[0051] 122. Second Board

[0052] 130. Yoke iron cylinder

[0053] 140. L-shaped yoke

[0054] 141. Paragraph 1

[0055] 142. Second paragraph

[0056] 200. Magnetic components

[0057] 210.Permanent magnet

[0058] 210a, first permanent magnet

[0059] 210b, second permanent magnet

[0060] 211. First magnetic pole surface

[0061] 212. Second magnetic pole surface

[0062] 220. Moving magnet

[0063] 221. Moving Pole Surface

[0064] 230. Magnetic Gap

[0065] 300. Coil assembly

[0066] 310. Electromagnetic Interaction Space

[0067] 311. Subspace

[0068] 320, coil unit

[0069] 320a, first coil unit

[0070] 320b, second coil unit

[0071] D1, first direction DETAILED DESCRIPTION

[0072] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0073] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0074] like Figures 1 to 4 As shown, the magnetic retaining magnetic circuit structure 10 of the embodiment of the present application includes a yoke 100 , a magnetic component 200 and a coil component 300 . The yoke 100 encloses a magnetic circuit space 101; the magnetic component 200 is arranged in the magnetic circuit space 101, and includes two permanent magnets 210 arranged at intervals along a first direction D1 and a dynamic magnet 220 movably arranged between the two permanent magnets 210, the two permanent magnets 210 are fixedly arranged relative to the yoke 100, and the permanent magnet 210 has a first magnetic pole face 211 and a second magnetic pole face 212 arranged opposite to each other, the two first magnetic pole faces 211 are in contact with the inner ring surface of the yoke 100, the two second magnetic pole faces 212 are arranged face to face, and the polarities of the two second magnetic pole faces 212 are the same; the dynamic magnet 220 has dynamic pole faces 221 at both ends along the first direction D1, and the two dynamic pole faces 221 face the two second magnetic pole faces 212 respectively; when the magnetic holding magnetic circuit structure is in a holding state, one of the dynamic pole faces 221 is in contact with only one of the second magnetic pole faces 212, and the other dynamic pole face 221 is separated from the other second magnetic pole face 212. The coil assembly 300 is fixed relative to the yoke 100 and surrounds the outer circumference of the magnetic assembly 200 ; the coil assembly 300 is configured to drive the moving magnetizer 220 to move between the two permanent magnets in response to an input signal.

[0075] The permanent magnet 210 is a material that can spontaneously generate a magnetic field and maintain magnetism for a long time without relying on external current.

[0076] The moving magnet 220 is movable between a first position and a second position; when the moving magnet 220 is located at one of the first position and the second position, one moving pole surface 221 contacts one of the second magnetic pole surfaces 212, and the other moving pole surface 221 is separated from the other second magnetic pole surface 212.

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

[0078] When the moving magnet 220 is located at the first position, the moving magnet 220 contacts the first permanent magnet 210a, and the moving magnet 220 is separated from the second permanent magnet 210b. When the moving magnet 220 is located at the second position, the moving magnet 220 contacts the second permanent magnet 210b, and the moving magnet 220 is separated from the first permanent magnet 210a.

[0079] like Figure 4 As shown, the coil assembly 300 encloses an electromagnetic action 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 in the electromagnetic action space 310 .

[0080] Of course, in other embodiments, the two magnetic gaps 230 may also be located outside the electromagnetic action space 310 of the coil assembly 300 .

[0081] In one embodiment, the coil assembly 300 includes two coil units 320, and the two coil units 320 are arranged at intervals along the first direction D1. The electromagnetic action space 310 has two subspaces 311, and one coil unit 320 encloses one subspace 311; the two magnetic gaps 230 are respectively located in the two subspaces 311. The two coil units 320 are respectively defined as a first coil unit 320a and a second coil unit 320b, and the first coil unit 320a surrounds the outer periphery of one of the magnetic gaps 230, and the second coil unit 320b surrounds the outer periphery of the other magnetic gap 230.

[0082] In the embodiment of the present application, the two coil units 320 are respectively and correspondingly surrounded by the outer circumferences of the two magnetic gaps 230 , so that the length of each coil unit 320 along the first direction D1 does not need to be designed to be too long, thereby saving material costs.

[0083] Of course, in other embodiments, the length of the coil assembly 300 along the first direction D1 may be designed to be longer so as to surround the entire dynamic conductive magnet 220 and surround the outer circumferences of the two magnetic gaps 230 .

[0084] like Figure 5 As shown, when the moving magnet 220 is located at the position shown in the figure and the coil assembly 300 is not powered, the distance between the moving magnet 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 magnet 220. At the same time, the distance between the moving magnet 220 and the second permanent magnet 210b is relatively far, and the polarity of the surfaces facing each other of the first permanent magnet 210a and the second permanent magnet 210b is the same, so that the magnetic field of the second magnetic pole surface 212 of the second permanent magnet 210b is relatively weak, and then the suction force generated by the second permanent magnet 210b on the moving magnet 220 is very small. Therefore, the moving magnet 220 can be maintained in a position in contact with the first permanent magnet 210a.

[0085] When the two coil units 320 are powered on and the power-on directions are the same, the direction of the magnetic field generated by the first coil unit 320a after power-on is opposite to the direction of the magnetic field generated by the first permanent magnet 210a, so that the magnetic field generated by the first coil unit 320a can offset the magnetic field generated by the first permanent magnet 210a, thereby reducing the suction force of the first permanent magnet 210a on the moving magnet 220. The direction of the magnetic field generated by the second coil unit 320b after power-on is the same as the direction of the magnetic field generated by the second permanent magnet 210b. The two magnetic fields are superimposed, increasing the suction force of the second permanent magnet 210b on the moving magnet 220. Through such a design, the suction forces on the two moving pole faces 221 of the moving magnet 220 are "increased and decreased", realizing the rapid switching of the moving magnet 220.

[0086] It should be noted that in the magnetic holding magnetic circuit structure in the prior art, one side surface of the 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 offset by the magnetic field generated by the coil and will immediately turn into a reverse magnetic field, that is, the holding suction force becomes zero and then immediately rises, which is not conducive to the rapid switching of the magnetic circuit structure.

[0087] In the embodiment of the present application, the magnetic holding magnetic circuit structure 10 uses the surface of the permanent magnet 210 as the pole surface. When the magnetic circuit structure is in the holding state, the moving magnet 220 only contacts the permanent magnet 210 and does not contact other parts made of magnetic conductive materials. The permanent magnet 210 provides sufficient suction to ensure the anti-vibration performance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, the moving pole surface 221 at one end of the moving magnet 220 is under the action of the reverse magnetic field provided by the coil assembly 300. The suction force of the permanent magnet on the moving magnet 220 will tend to zero as the power of the coil assembly 300 increases, while the suction force of the moving pole surface 221 at the other end of the moving magnet 220 will continue to increase. Therefore, the switching speed of the moving magnet 220 of the magnetic holding magnetic circuit structure 10 of the embodiment of the present application becomes faster and faster as the power of the coil assembly 300 increases.

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

[0089] Of course, in other embodiments, when the magnetic latching magnetic circuit structure 10 is installed in a relay, the two permanent magnets 210 may also be fixedly connected to other components of the relay to ensure that the two permanent magnets 210 are in contact with the yoke 100 .

[0090] like Figure 3 and Figure 4 As shown, the yoke 100 includes a plurality of split bodies 100 a , and the plurality of split bodies 100 a are sequentially connected end to end to form a magnetic circuit space 101 .

[0091] In the embodiment of the present application, the yoke 100 adopts a structure in which a plurality of split bodies 100a are sequentially connected end to end, which is convenient for processing and assembly.

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

[0093] In one embodiment, the yoke 100 includes two split bodies 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 the first direction D1, and the magnetic component 200 is located between the first plate 121 and the yoke plate 110, one end of the two second plates 122 is respectively connected to the two ends of the first plate 121, and the other end of the two second plates 122 is respectively connected to the two ends of the yoke plate 110; wherein, the two permanent magnets 210 are respectively fixedly connected to the surfaces of the first plate 121 and the yoke plate 110 facing each other. In the embodiment of the present application, the first permanent magnet 210a is fixedly connected to the first plate 121, and the second permanent magnet 210b is fixedly connected to the yoke plate 110.

[0094] In one embodiment, the first magnetic pole surface 211 , the second magnetic pole surface 212 , and the moving pole surface 221 are all perpendicular to the first direction D1 .

[0095] Of course, in other embodiments, the first magnetic pole surface 211 , the second magnetic pole surface 212 , and the moving pole surface 221 may also be non-perpendicular to the first direction D1 .

[0096] In one embodiment, in the corresponding second magnetic pole surface 212 and moving pole surface 221, the orthographic projection of the second magnetic pole surface 212 on a target plane is the first projection, and the orthographic projection of the moving pole surface 221 on the target plane is the second projection, and the second projection coincides with the first projection or the second projection falls within the first projection; the target plane is perpendicular to the first direction D1.

[0097] In the embodiment of the present application, the second projection coincides with the first projection, or the second projection falls within the first projection, that is, the second projection does not exceed the first projection. This can further ensure that when in the holding state, the dynamic magnet 220 only contacts the permanent magnet 210 and does not contact other components made of magnetic conductive materials.

[0098] Of course, in other embodiments, the first projection may also fall within the second projection. At this time, although part of the moving pole surface 221 of the moving magnet 220 exceeds the edge of the second magnetic pole surface 212, as long as a sufficiently large gap is reserved between other parts made of magnetic conductive materials and the moving pole surface 221, the influence of other parts made of magnetic conductive materials on the switching action of the moving magnet 220 can also be reduced.

[0099] In one embodiment, the first projection and the second projection are circular, that is, the dynamic conductive magnet 220 and the permanent magnet are both cylindrical.

[0100] like Figure 6 As shown, the first projection and the second projection are polygonal, that is, the dynamic conductive magnet 220 and the permanent magnet are prisms, such as triangular prisms, quadrangular prisms, and pentagonal prisms.

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

[0102] Of course, it is understandable that the shapes of the moving magnet 220 and the permanent magnet 210 can be designed to be different, as long as the second projection coincides with the first projection or the second projection falls within the first projection. For example, the moving magnet 220 is a cylinder and the permanent magnet 210 is a prism.

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

[0104] like Figure 8 As shown, the yoke 100 includes three parts 100a, two of which are yoke plates 110, and the other part 100a is a yoke tube 130. The yoke tube 130 has openings at both axial ends. The two yoke plates 110 are respectively connected to the axial ends of the yoke tube 130 and cover the two openings of the yoke tube 130 respectively. The two permanent magnets 210 are respectively fixedly connected to the surfaces of the two yoke plates 110 facing each other.

[0105] In one embodiment, two yoke plates 110 and one yoke tube 130 may form a hollow cylinder, in which case the yoke plates 110 may be a circular flat plate structure, and the yoke tube 130 may be cylindrical. Of course, in other embodiments, two yoke plates 110 and one yoke tube 130 may form a hollow cube, in which case the yoke plates 110 may be a rectangular flat plate structure, and the yoke tube 130 may be a rectangular tube.

[0106] like Fig. 9 As shown, the yoke 100 includes two parts 100a, each part 100a is an L-shaped yoke 140, and the two L-shaped yokes 140 are connected end to end in sequence to form a rectangular frame; wherein the two permanent magnets 210 are fixedly connected to the two L-shaped yokes 140 respectively.

[0107] For example, each L-shaped yoke 140 includes a first section 141 and a second section 142, and the first section 141 and the second section 142 are both in the shape of a plate. One end of the first section 141 is connected to one end of the second section 142, and the first section 141 and the second section 142 are arranged. One end of the first section 141 of each L-shaped yoke 140 away from the second section 142 is connected to one end of the second section 142 of another L-shaped yoke 140 away from the first section 141. Among them, the first sections 141 of the two L-shaped yokes 140 are arranged opposite to each other, and the second sections 142 of the two L-shaped yokes 140 are arranged opposite to each other.

[0108] The two permanent magnets 210 may be fixedly connected to the surfaces of the two first sections 141 facing each other, or may be fixedly connected to the surfaces of the two second sections 142 facing each other.

[0109] In one implementation, the two L-shaped yokes 140 may be connected by means of clamping, welding, etc., which is not limited in the present application.

[0110] As an example, both ends of one L-shaped yoke 140 are provided with protrusions, and both ends of the other L-shaped yoke 140 are provided with grooves, and the protrusions can be inserted into the grooves.

[0111] like Fig.10 As shown, the yoke 100 includes four parts 100a, each part 100a is a yoke plate 110, and the four yoke plates 110 are connected end to end in sequence to form a rectangular frame; wherein, the two permanent magnets 210 are respectively fixedly connected to the surfaces of any two oppositely arranged yoke plates 110.

[0112] In one embodiment, adjacent yoke plates 110 may be connected by means of clamping, welding, etc., which is not limited in the present application.

[0113] As an example, each of the two oppositely disposed yoke plates 110 is provided with protrusions at both ends, and each of the other two oppositely disposed yoke plates 110 is provided with grooves at both ends, and the protrusions can be snapped into the grooves, and the two adjacent yoke plates 110 are snapped together through the corresponding protrusions and grooves.

[0114] like Fig.11 and Fig.12 As shown, another aspect of the present application further provides a relay, comprising the magnetic latching magnetic circuit structure 10 of any of the above embodiments.

[0115] The relay further includes a driving member 20, a moving member 30 and a contact assembly 40. The driving member 20 is connected to the moving magnet 220, the moving member 30 is connected to the driving member 20, and the moving member 30 can drive the contact assembly 40 to switch between a closed state and an open state.

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

[0117] In summary, the magnetic latching magnetic circuit structure 10 and the relay of the embodiment of the present application have at least the following advantages and beneficial effects:

[0118] The magnetic holding magnetic circuit structure 10 of the embodiment of the present application uses the surface of the permanent magnet as the pole face. When the magnetic circuit structure is in the holding state, the moving magnet 220 only contacts the permanent magnet and does not contact other parts made of magnetic conductive materials. The permanent magnet provides sufficient suction to ensure the anti-vibration performance and reliability of the magnetic circuit structure. When the coil assembly 300 is energized, the moving pole face 221 at one end of the moving magnet 220 is under the action of the reverse magnetic field provided by the coil assembly 300. The suction force of the permanent magnet on the moving magnet 220 will tend to zero as the power of the coil assembly 300 increases, while the suction force of the moving pole face 221 at the other end of the moving magnet 220 will continue to increase. Therefore, as the power of the coil assembly 300 increases, the switching speed of the moving magnet 220 of the magnetic holding magnetic circuit structure 10 of the embodiment of the present application becomes faster and faster.

[0119] It can be understood that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0120] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0121] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0122] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0123] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A magnetic latching magnetic circuit structure, characterized in that: include: The yoke iron encloses a magnetic circuit space; A magnetic component is arranged in the magnetic circuit space and includes two permanent magnets arranged at intervals along a first direction and a moving magnet movably arranged between the two permanent magnets, the two permanent magnets are fixedly arranged relative to the yoke, the permanent magnets have first magnetic pole faces and second magnetic pole faces arranged opposite to each other, the two first magnetic pole faces are in contact with the inner ring surface of the yoke, the two second magnetic pole faces are arranged face to face, and the polarities of the two second magnetic pole faces are the same; the moving magnet has moving pole faces at both ends along the first direction, and the two moving pole faces face the two second magnetic pole faces respectively; when the magnetic holding magnetic circuit structure is in a holding state, one of the moving pole faces is in contact with only one of the second magnetic pole faces, and the other moving pole face is separated from the other second magnetic pole face; as well as The coil component is fixedly arranged relative to the yoke and surrounds the outer periphery of the magnetic component; the coil component is configured to drive the moving magnet to move between the two permanent magnets in response to an input signal.

2. The magnetic holding circuit structure according to claim 1, characterized in that: The coil assembly forms an electromagnetic action space, a magnetic gap is formed between the corresponding moving pole surface and the second magnetic pole surface, and the two magnetic gaps are located in the electromagnetic action space.

3. The magnetic holding magnetic circuit structure according to claim 2, characterized in that: The coil assembly includes two coil units, the electromagnetic action space has two subspaces, and one coil unit encloses one subspace; The two magnetic gaps are located in the two subspaces respectively.

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

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

6. The magnetic holding circuit structure according to claim 5, characterized in that: The yoke includes two split 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 the two second plates are respectively connected to the two ends of the first plate, and the other ends of the two second plates are respectively connected to the two ends of the yoke plate; The two permanent magnets are respectively fixedly connected to the mutually facing surfaces of the first plate and the yoke iron plate.

7. The magnetic latching magnetic circuit structure according to claim 5, characterized in that: The yoke comprises three parts, two of which are yoke plates, and the other part is a yoke cylinder. The yoke cylinder has openings at both axial ends. The two yoke plates are respectively connected to the two axial ends of the yoke cylinder and cover the two openings of the yoke cylinder respectively. Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of the two yoke iron plates facing each other.

8. The magnetic latching magnetic circuit structure according to claim 5, characterized in that: The yoke comprises two split bodies, each of which is an L-shaped yoke, and the two L-shaped yokes are sequentially connected end to end to form a rectangular frame; Wherein, the two permanent magnets are respectively fixedly connected to the two L-shaped yokes.

9. The magnetic latching magnetic circuit structure according to claim 5, characterized in that: The yoke comprises four parts, each of which is a yoke plate, and the four yoke plates are sequentially connected end to end to form a rectangular frame; Wherein, the two permanent magnets are respectively fixedly connected to the surfaces of any two oppositely arranged yoke iron plates.

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

11. The magnetic latching magnetic circuit structure according to claim 1, characterized in that: In the corresponding second magnetic pole surface and the moving pole surface, the orthographic projection of the second magnetic pole surface on a target plane is a first projection, the orthographic projection of the moving pole surface on the target plane is a second projection, and the second projection coincides with the first projection or the second projection falls within the first projection; The target plane is perpendicular to the first direction.

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

13. A relay, characterized in that: It comprises the magnetic retaining magnetic circuit structure as described in any one of claims 1-12.

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