Magnetic circuit structure and relay

Abstract

The application discloses a magnetic circuit structure and a relay. The magnetic circuit structure comprises an armature assembly and a plurality of coil assemblies. The armature assembly comprises a permanent magnet. The plurality of coil assemblies comprise a first coil assembly and a second coil assembly which are arranged at intervals along an X-axis direction. The magnetic field directions generated by the first coil assembly and the second coil assembly under energization are the same. The first coil assembly and the second coil assembly can drive the armature assembly to move linearly along the X-axis direction when forward and reverse excitation is performed, and can make the armature assembly form a plurality of magnetic pole surfaces with the first coil assembly and the second coil assembly respectively.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a magnetic circuit structure and a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] Among them, magnetic latching relays, as electromagnetic relays that can maintain the on / off state of contacts without continuous energization, are widely used in smart grids, new energy vehicles, smart homes, industrial control and other fields due to their advantages of low power consumption and high reliability.

[0004] The magnetic circuit structure of a relay includes a winding, an iron core, a magnetic conductor, a permanent magnet, and an armature. The permanent magnet provides the holding magnetic field to maintain the contact state. When the coil is energized, the excitation magnetic field generated superimposed or canceled out the magnetic field of the permanent magnet, realizing the switching of the armature's engagement and disengagement. However, the holding force and switching speed of the armature in the magnetic circuit structure of existing magnetic latching relays still need further improvement. Summary of the Invention

[0005] This application provides a magnetic circuit structure and a relay to improve the holding force of the magnetic circuit structure and the switching speed of the armature.

[0006] The magnetic circuit structure of this application embodiment includes an armature assembly and multiple coil assemblies. The armature assembly includes a permanent magnet, and the multiple coil assemblies include first coil assemblies and second coil assemblies arranged at intervals along the X-axis direction. The magnetic fields generated by the first coil assembly and the second coil assembly are in the same direction when energized. When the first coil assembly and the second coil assembly are energized in the forward and reverse directions, they can drive the armature assembly to move linearly along the X-axis and enable the armature assembly to form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly respectively.

[0007] According to some embodiments of this application, each coil assembly includes a core, a winding, and a magnetic conductor. The winding is wound around the core, and the magnetic conductor is respectively provided at both ends of the core along the X-axis. The armature assembly further includes an armature member, and a permanent magnet is fixed to one side surface of the armature member facing the plurality of coil assemblies. The armature member is respectively provided with a attracting portion at both ends along the X-axis. The armature assembly is movable between a first position and a second position. When the armature assembly is located in the first position, the attraction part and the permanent magnet at one end of the armature can magnetically attract the magnetic conductors at both ends of the core of the first coil assembly to form a first magnetic circuit. The first magnetic circuit includes two magnetic pole surfaces. When the armature assembly is in the second position, the attracting part and the permanent magnet at the other end of the armature can magnetically attract the magnetic conductors at both ends of the core of the second coil assembly to form a second magnetic circuit, the second magnetic circuit including two magnetic pole surfaces.

[0008] According to some embodiments of this application, the magnetic conductors provided at one end of the core in the first coil assembly and the second coil assembly that are close to each other are defined as first magnetic conductors; each first magnetic conductor extends from the corresponding core along the Y-axis direction toward the armature assembly, and the end of the first magnetic conductor has a first attraction surface; the Y-axis direction is perpendicular to the X-axis direction; When the armature assembly is in the first position, the permanent magnet is magnetically attracted to the first contact surface of the first coil assembly to form a magnetic pole surface; when the armature assembly is in the second position, the permanent magnet is magnetically attracted to the first contact surface of the second coil assembly to form a magnetic pole surface.

[0009] According to some embodiments of this application, when the armature assembly is located in the first position or the second position, there is a gap between the permanent magnet and the corresponding first attraction surface.

[0010] According to some embodiments of this application, the magnetic conductors provided at the ends of the cores of the first coil assembly and the second coil assembly that are close to each other are defined as the first magnetic conductors, and the magnetic conductors provided at the ends that are far from each other are defined as the second magnetic conductors; the attracting portions at both ends of the armature along the X-axis direction are the first attracting portion and the second attracting portion, respectively. When the armature assembly is in the first position, the first attracting part contacts and magnetically attracts the second magnetic conductor of the first coil assembly, and the permanent magnet magnetically attracts the first magnetic conductor of the first coil assembly to form two of the magnetic pole surfaces, while the second attracting part separates from the second magnetic conductor of the second coil assembly. When the armature assembly is in the second position, the second engaging part contacts and magnetically engages with the second magnetic conductor of the second coil assembly, and the permanent magnet magnetically engages with the first magnetic conductor of the second coil assembly to form two other magnetic pole surfaces, while the first engaging part separates from the second magnetic conductor of the first coil assembly.

[0011] According to some embodiments of this application, when the armature assembly is located in the first position, the permanent magnet and the first magnetic conductor of the second coil assembly have or do not overlap in the orthographic projection on the plane where the armature is located. When the armature assembly is in the second position, the permanent magnet and the first magnetic conductor of the first coil assembly may or may not overlap in the orthographic projection on the plane where the armature is located.

[0012] According to some embodiments of this application, when the armature assembly is located in the first position, the area where the projection of the permanent magnet and the first magnetic conductor of the first coil assembly overlaps on the plane where the armature is located is defined as the first projection, and the area where the projection of the permanent magnet and the first magnetic conductor of the second coil assembly overlaps on the plane where the armature is located is defined as the second projection, and the area of ​​the first projection is larger than the area of ​​the second projection. When the armature assembly is in the second position, the area where the projection of the permanent magnet and the first magnetic conductor of the second coil assembly overlaps on the plane where the armature is located is defined as the third projection, and the area where the projection of the permanent magnet and the first magnetic conductor of the first coil assembly overlaps on the plane where the armature is located is defined as the fourth projection. The area of ​​the third projection is larger than the area of ​​the fourth projection.

[0013] According to some embodiments of this application, the magnetic conductors provided at the ends of the cores in the first coil assembly and the second coil assembly that are far apart from each other are defined as second magnetic conductors. The two second magnetic conductors are bent to form extensions. The extensions of the two second magnetic conductors extend along the X-axis direction and toward a direction that is close to each other. The ends of the extensions have second attraction surfaces. When the armature assembly is in the first position, the attraction portion at one end of the armature magnetically engages with the second attraction surface of the extension portion of the second magnetic conductor of the first coil assembly to form a magnetic pole surface; when the armature assembly is in the second position, the attraction portion at the other end of the armature magnetically engages with the second attraction surface of the extension portion of the second magnetic conductor of the second coil assembly to form a magnetic pole surface.

[0014] According to some embodiments of this application, the armature has bent portions at both ends along the X-axis, and at least a portion of the bent portions is the suction portion.

[0015] According to some embodiments of this application, in each coil assembly, one of the magnetic conductors at both ends of the core is integrally connected to the core, and the other magnetic conductor is separately connected to the core.

[0016] According to some embodiments of this application, the magnetic conductor provided at one end of the core in the first coil assembly and the second coil assembly that is close to each other is defined as a first magnetic conductor. When the armature assembly moves between the first position and the second position, at least one of the first magnetic conductors and the permanent magnets have overlapping areas on the plane where the armature is located.

[0017] According to some embodiments of this application, the magnetization direction of the permanent magnet is parallel to the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction.

[0018] According to some embodiments of this application, the first coil assembly and the second coil assembly are located on the same side of the armature assembly along the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction.

[0019] According to some embodiments of this application, the first coil assembly and the second coil assembly are arranged symmetrically.

[0020] According to some embodiments of this application, the magnetic circuit structure further includes a limiting structure, which is in a limiting engagement with the armature assembly in the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction.

[0021] The relays in this application include the magnetic circuit structure described in any of the above claims.

[0022] An embodiment of the above application has at least the following advantages or beneficial effects: In the magnetic circuit structure of this application embodiment, the first and second coil assemblies can drive the armature assembly to move linearly when energized in the forward and reverse directions, respectively. This allows the armature assembly to form multiple magnetic pole surfaces with the first and second coil assemblies, resulting in greater attraction between the armature assembly and the first coil assembly, or between the armature assembly and the second coil assembly. Consequently, the magnetic circuit structure has a larger holding force, which effectively resists external impact forces and prevents the relay from erroneously disconnecting or closing. Furthermore, the first and second coil assemblies are spaced apart along the X-axis, and the magnetic fields they generate when energized are in the same direction. This allows one coil assembly to exert a repulsive force on the armature assembly while the other exerts an attractive force during armature switching. The repulsive and attractive forces work together to drive the armature assembly to move rapidly in the switching direction, enabling rapid armature assembly operation and shortening the switching time. Additionally, the spaced arrangement of the first and second coil assemblies increases the distance between them, preventing mutual interference between their respective magnetic fields and resulting in higher magnetic efficiency. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a three-dimensional schematic diagram of the magnetic circuit structure of the first embodiment of this application.

[0025] Figure 2 yes Figure 1 The front view, in which the armature assembly is in the first position.

[0026] Figure 3 yes Figure 1 The front view, with the armature assembly in the second position.

[0027] Figure 4 This is a schematic diagram of the magnetic circuit when the armature assembly of the magnetic circuit structure of the first embodiment of this application is in the first position.

[0028] Figure 5 This is a schematic diagram of the magnetic circuit when the armature assembly of the magnetic circuit structure of the first embodiment of this application is located in the intermediate position between the first position and the second position.

[0029] Figure 6 This is a schematic diagram of the magnetic circuit when the armature assembly of the magnetic circuit structure of the first embodiment of this application is in the second position.

[0030] Figure 7 This is a schematic diagram showing the linear arrangement of the first magnetic conductor and the corresponding core in the magnetic circuit structure of this application.

[0031] Figure 8 It is along Figure 2 A cross-sectional view of one embodiment of the AA section line.

[0032] Figure 9 It is along Figure 2 A cross-sectional view of another embodiment of the AA section line.

[0033] Figure 10 This is a schematic diagram of the magnetic circuit structure of the second embodiment of this application.

[0034] Figure 11 This is a schematic diagram of the magnetic circuit structure of the third embodiment of this application.

[0035] The reference numerals in the attached figures are explained as follows: 110. Armature assembly; 111. Armature component; 1111. Activation part; 1111a. First activation part; 1111b. Second activation part; 1112. Bending part; 1121. Permanent magnet; 120, Coil assembly; 120a, First coil assembly; 120b, Second coil assembly; 121, Core; 122, Winding; 123, Magnetic conductor; 123a, First magnetic conductor; 123b, Second magnetic conductor; 1231, First contact surface; 1232, Extension; 1233, Second contact surface. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] For ease of explanation, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" are used in the specific embodiments of this application. These terms simply refer to a feature having one of these directions being perpendicular to a feature having the other direction; they do not require implementation according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction, Y-axis direction, and Z-axis direction are mutually perpendicular.

[0039] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0040] Unless otherwise specified, in the claims and description, the terms “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0041] The magnetic circuit structure provided in this application includes an armature assembly and multiple coil assemblies. The armature assembly includes a permanent magnet, and the multiple coil assemblies include a first coil assembly and a second coil assembly arranged at intervals along the X-axis. When energized, the first coil assembly and the second coil assembly generate magnetic fields in the same direction. When the first coil assembly and the second coil assembly are energized in the forward and reverse directions, they can drive the armature assembly to move linearly along the X-axis, and enable the armature assembly to form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly, respectively.

[0042] In the magnetic circuit structure of this application embodiment, the first coil assembly and the second coil assembly can drive the armature assembly to move linearly when energized in the forward and reverse directions, respectively. This allows the armature assembly to form multiple magnetic pole surfaces with the first and second coil assemblies. Consequently, the attraction between the armature assembly and the first coil assembly, or between the armature assembly and the second coil assembly, is greater, resulting in a larger holding force in the magnetic circuit structure. This larger holding force effectively resists external impact forces, preventing the relay from erroneously disconnecting or closing. Furthermore, the first and second coil assemblies are spaced apart along the X-axis, and the magnetic fields they generate when energized are in the same direction. This allows one of the first and second coil assemblies to exert a repulsive force on the armature assembly while the other exerts an attractive force during armature assembly switching. The repulsive and attractive forces work together to drive the armature assembly to move rapidly in the switching direction, enabling rapid armature assembly operation and shortening the switching time.

[0043] Next, the magnetic circuit structure of the embodiments of this application will be described in detail with reference to the accompanying drawings.

[0044] First Embodiment

[0045] like Figures 1 to 3As shown, the magnetic circuit structure of this application embodiment includes an armature assembly 110 and a plurality of coil assemblies 120. The plurality of coil assemblies 120 include a first coil assembly 120a and a second coil assembly 120b. The first coil assembly 120a and the second coil assembly 120b are arranged at intervals along the X-axis direction. Each coil assembly 120 includes a core 121, a winding 122 and a magnetic conductor 123. The winding 122 is wound around the outer periphery of the core 121, and the magnetic conductor 123 is fixedly provided at both ends of the core 121 along the X-axis direction. The magnetic fields generated by the first coil assembly 120a and the second coil assembly 120b when energized are in the same direction. When the first coil assembly 120a and the second coil assembly 120b are energized in the forward and reverse directions, they can drive the armature assembly 110 to move linearly between the first position and the second position along the X-axis. The armature assembly 110 includes an armature 111 and a permanent magnet 1121. The permanent magnet 1121 is fixed on one side surface of the armature 111 facing the multiple coil assemblies 120. The armature 111 has a suction part 1111 at both ends along the X-axis. When the armature assembly 110 is in the first position, the attraction portion 1111 at one end of the armature 111 and the permanent magnet 1121 are magnetically attracted to the magnetic conductors 123 at both ends of the core 121 of the first coil assembly 120a, respectively, to form a first magnetic circuit Φ1. The first magnetic circuit Φ1 includes two magnetic pole surfaces. One magnetic pole surface is formed by the attraction portion 1111 at one end of the armature 111 and the magnetic conductor 123 at one end of the core 121 of the first coil assembly 120a. The other magnetic pole surface is formed by the permanent magnet 1121 and the magnetic conductor 123 at the other end of the core 121. When the iron assembly 110 is in the second position, the attraction part 1111 and the permanent magnet 1121 at the other end of the armature 111 are magnetically attracted to the magnetic conductors 123 at both ends of the core 121 of the second coil assembly 120b to form a second magnetic circuit Φ2. The second magnetic circuit Φ2 includes two magnetic pole surfaces. One magnetic pole surface is formed by the attraction part 1111 at the other end of the armature 111 and the magnetic conductor 123 at one end of the core 121 of the second coil assembly 120b. The other magnetic pole surface is formed by the permanent magnet 1121 and the magnetic conductor 123 at the other end of the core 121.

[0046] In one embodiment, in order to ensure that the magnetic field generated by the first coil assembly 120a and the second coil assembly 120b has the same direction when energized, the winding direction of the winding 122 of the first coil assembly 120a and the second coil assembly 120b is the same, and when the winding 122 carries the same current, the magnetic field generated by the first coil assembly 120a and the second coil assembly 120b has the same direction.

[0047] Of course, in another embodiment, the winding directions of the windings 122 of the first coil assembly 120a and the second coil assembly 120b are opposite. However, by adjusting the energizing direction of the two windings 122, the magnetic field directions generated by the first coil assembly 120a and the second coil assembly 120b when energized can also be the same.

[0048] For ease of explanation, the magnetic conductors 123 at both ends of each core 121 along the X-axis direction are respectively a first magnetic conductor 123a and a second magnetic conductor 123b. The two cores 121 in the first coil assembly 120a and the second coil assembly 120b are respectively provided with a first magnetic conductor 123a at the end that is close to each other in the X-axis direction, and a second magnetic conductor 123b at the other end that is far away from each other in the X-axis direction.

[0049] In detail, the core 121 of the first coil assembly 120a has a first magnetic conductor 123a and a second magnetic conductor 123b fixedly disposed at both ends along the X-axis. The first magnetic conductor 123a of the first coil assembly 120a is located at the right end of the core 121, and the second magnetic conductor 123b of the first coil assembly 120a is located at the left end of the core 121. The core 121 of the second coil assembly 120b has a first magnetic conductor 123a and a second magnetic conductor 123b fixedly disposed at both ends along the X-axis. The first magnetic conductor 123a of the second coil assembly 120b is located at the left end of the core 121, and the second magnetic conductor 123b of the second coil assembly 120b is located at the right end of the core 121. The two first magnetic conductors 123a are close to each other in the X-axis direction, and the two second magnetic conductors 123b are far apart from each other in the X-axis direction.

[0050] The armature 111 has two attraction portions 1111 at its two ends along the X-axis, namely a first attraction portion 1111a and a second attraction portion 1111b. The first attraction portion 1111a is located at the left end of the armature 111 along the X-axis, and the second attraction portion 1111b is located at the right end of the armature 111 along the X-axis. The first attraction portion 1111a can be magnetically attracted to the second magnetic conductor 123b of the first coil assembly 120a, and the second attraction portion 1111b can be magnetically attracted to the second magnetic conductor 123b of the second coil assembly 120b.

[0051] like Figure 4As shown, in an exemplary embodiment, the armature assembly 110 is held in a first position. At this time, the first engaging portion 1111a contacts and magnetically engages with the second magnetic conductor 123b of the first coil assembly 120a to form a magnetic pole surface, and the permanent magnet 1121 magnetically engages with the first magnetic conductor 123a of the first coil assembly 120a to form another magnetic pole surface, so that the armature assembly 110 and the first coil assembly 120a form a first magnetic circuit Φ1. The second magnetic attraction part 1111b is separated from the second magnetic conductor 123b of the second coil assembly 120b. There is a large gap between the second magnetic attraction part 1111b and the second magnetic conductor 123b, and the magnetic flux is small. Therefore, there is basically no attraction between the second magnetic attraction part 1111b and the second magnetic conductor 123b. The orthogonal projections of the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b on the plane where the armature 111 is located do not overlap. Therefore, there is a large magnetic gap between the permanent magnet 1121 and the first magnetic conductor 123a, and the magnetic flux is small. Therefore, there is basically no attraction between the permanent magnet 1121 and the first magnetic conductor 123a. Therefore, compared with the scheme in the related technology where the armature assembly and the coil assembly form a single magnetic pole surface, the magnetic circuit structure implemented in this application has at least two magnetic pole surfaces in the magnetic circuit formed when the armature assembly 110 is in the holding state. The attraction between the coil assembly and the armature assembly 110 is greater, and thus the magnetic circuit structure has a larger holding force, which improves the impact resistance.

[0052] like Figure 5As shown, when the windings 122 of the first coil assembly 120a and the second coil assembly 120b are negatively energized, since the winding directions of the windings 122 of the first coil assembly 120a and the second coil assembly 120b are the same, the magnetic fields generated by the first coil assembly 120a and the second coil assembly 120b are in the same direction. Specifically, the magnetic field generated by the first coil assembly 120a is used to cancel the magnetic flux of the first magnetic circuit Φ1 formed by the first coil assembly 120a and the armature assembly 110, and the magnetic field generated by the second coil assembly 120b is used to enhance the magnetic flux of the second magnetic circuit formed by the second coil assembly 120b and the armature assembly 110. Under the action of "one increasing and one decreasing", the holding force on the armature assembly 110 in the first position decreases rapidly, the energizing time becomes shorter, and the armature assembly 110 begins to move from the first position to the second position. As the armature assembly 110 begins to move, the gaps between the first engaging part 1111a and the second magnetic conductor 123b of the first coil assembly 120a, as well as the gaps between the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a, begin to increase. Meanwhile, the gaps between the second engaging part 1111b and the second magnetic conductor 123b of the second coil assembly 120b, as well as the gaps between the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b, begin to decrease. This causes the magnetic gap of the first magnetic circuit to increase, while the magnetic gap of the second magnetic circuit to decrease. Consequently, the magnetic flux of the second magnetic circuit rapidly increases under the combined effect of the rising current in the winding 122, the change in the position of the armature assembly 110, and the decrease in the magnetic gap of the magnetic circuit. Meanwhile, the magnetic flux of the first magnetic circuit rapidly decreases. As a result, the speed at which the armature assembly 110 moves from the first position to the second position increases rapidly, and the switching time becomes shorter. Therefore, the switching action of the armature assembly 110 of the magnetic circuit structure in this application embodiment requires less time and has the advantage of rapid switching.

[0053] In addition, such as Figure 5 As shown, when the windings 122 of the first coil assembly 120a and the second coil assembly 120b are negatively energized, the magnetic field direction of the first coil assembly 120a is opposite to that of the permanent magnet 1121. At this time, a repulsive force is formed between the permanent magnet 1121 and the first coil assembly 120a. The component of this repulsive force along the X-axis helps drive the armature assembly 110 to move to the right. Simultaneously, the magnetic field direction of the second coil assembly 120b is the same as that of the permanent magnet 1121. At this time, an attractive force is formed between the permanent magnet 1121 and the second coil assembly 120b. The component of this attractive force along the X-axis also helps drive the armature assembly 110 to move to the right. Therefore, when the armature assembly 110 switches, it is simultaneously subjected to both repulsive and attractive forces in the same direction, further accelerating the switching speed of the armature assembly 110.

[0054] like Figure 6As shown, when the armature assembly 110 is held in the second position, the second attraction part 1111b contacts the second magnetic conductor 123b of the second coil assembly 120b and forms a magnetic pole surface, and the permanent magnet 1121 magnetically attracts the first magnetic conductor 123a of the second coil assembly 120b and forms another magnetic pole surface, so that the armature assembly 110 and the second coil assembly 120b form a second magnetic circuit Φ2.

[0055] It should be noted that when the first coil assembly 120a and the second coil assembly 120b are reverse-energized, that is, when the armature assembly 110 is energized by... Figure 6 state of being Figure 5 state towards Figure 4 When the state changes, it is the opposite of what was described above, and will not be repeated here.

[0056] In summary, the magnetic circuit structure of this embodiment, by setting multiple coil assemblies 120, and when the armature assembly 110 is in the first or second position, the magnetic circuit formed by the armature assembly 110 and the coil assembly has multiple magnetic pole surfaces, resulting in a greater attraction between the coil assembly 120 and the armature assembly 110. Consequently, the magnetic circuit structure has a greater holding force, improving its impact resistance. Furthermore, the first coil assembly 120a and the second coil assembly 120b are arranged at intervals along the X-axis, and the magnetic fields generated by the first coil assembly 120a and the second coil assembly 120b when energized are in the same direction. This allows the first and second magnetic circuits to form a "one increasing, one decreasing" effect when the armature assembly 110 switches, significantly shortening the time required for the armature assembly 110 to switch, thus providing the advantage of rapid switching. Furthermore, during the switching of the armature assembly 110, one of the first coil assembly 120a and the second coil assembly 120b applies a repulsive force to the armature assembly 110, while the other applies an attractive force. These forces work together to drive the armature assembly 110 to move rapidly in the switching direction, enabling it to operate quickly and shortening the switching time. Additionally, the first coil assembly 120a and the second coil assembly 120b are spaced apart, increasing the distance between them and preventing their respective magnetic fields from interfering with each other, resulting in higher magnetic efficiency.

[0057] like Figure 2 and Figure 3As shown, the permanent magnet 1121 is fixedly connected to the armature 111, and the permanent magnet 1121 is connected to the middle position of the armature 111 along the X-axis direction. When the armature assembly 110 is in the first position, the attracting part 1111 and the permanent magnet 1121 at one end of the armature 111 are magnetically attracted to the magnetic conductors 123 at both ends of the core 121 of the first coil assembly 120a, respectively, to form a first magnetic circuit. When the armature assembly 110 is in the second position, the attracting part 1111 and the permanent magnet 1121 at the other end of the armature 111 are magnetically attracted to the magnetic conductors 123 at both ends of the core 121 of the second coil assembly 120b, respectively, to form a second magnetic circuit.

[0058] Optionally, the armature 111 has a flat plate structure, and its main plane is perpendicular to the Y-axis direction; wherein, the main plane refers to the surface with the largest area in the armature 111. The first coil assembly 120a and the second coil assembly 120b are located on one side of the armature 111 along its thickness direction (Y-axis direction), and the permanent magnet 1121 is fixedly connected to the side surface of the armature 111 facing the multiple coil assemblies. The permanent magnet 1121 is located on the same side of the armature 111 as the first coil assembly 120a and the second coil assembly 120b.

[0059] When the armature assembly 110 is in the first position, the first engaging part 1111a contacts and magnetically engages with the second magnetic conductor 123b of the first coil assembly 120a, and the permanent magnet 1121 magnetically engages with the first magnetic conductor 123a of the first coil assembly 120a. At this time, the second engaging part 1111b separates from the second magnetic conductor 123b of the second coil assembly 120b, and there is no overlapping area between the orthographic projection of the first magnetic conductor 123a of the second coil assembly 120b and the permanent magnet 1121 on the plane where the armature 111 is located. When the armature assembly 110 is in the second position, the second attraction part 1111b contacts and magnetically attracts the second magnetic conductor 123b of the second coil assembly 120b, and the permanent magnet 1121 magnetically attracts the first magnetic conductor 123a of the second coil assembly 120b. At this time, the first attraction part 1111a separates from the second magnetic conductor 123b of the first coil assembly 120a, and there is no overlapping area between the orthographic projection of the first magnetic conductor 123a of the first coil assembly 120a and the permanent magnet 1121 on the plane where the armature 111 is located.

[0060] Of course, in other embodiments, when the armature assembly 110 is in the first position, the orthographic projections of the first magnetic conductor 123a and the permanent magnet 1121 of the second coil assembly 120b onto the plane where the armature 111 is located may also overlap. When the armature assembly 110 is in the second position, the orthographic projections of the first magnetic conductor 123a and the permanent magnet 1121 of the first coil assembly 120a onto the plane where the armature 111 is located may also overlap.

[0061] In one embodiment, when the armature assembly 110 is in the first position, the area where the orthographic projections of the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a overlap on the plane where the armature 111 is located is defined as the first projection, and the area where the orthographic projections of the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b overlap on the plane where the armature 111 is located is defined as the second projection, and the area of ​​the first projection is larger than the area of ​​the second projection; When the armature assembly 110 is in the second position, the area where the orthographic projections of the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b on the plane where the armature 111 is located is defined as the third projection, and the area where the orthographic projections of the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a on the plane where the armature 111 is located is defined as the fourth projection. The area of ​​the third projection is larger than the area of ​​the fourth projection.

[0062] In this embodiment, when the armature assembly 110 is held in the first position, the area of ​​the first projection is larger than the area of ​​the second projection. This allows the armature assembly 110 to move smoothly when switching from the first position to the second position, avoiding the problem of the armature assembly 110 being unable to switch. When the armature assembly 110 is held in the second position, the area of ​​the third projection is larger than the area of ​​the fourth projection. This allows the armature assembly 110 to move smoothly when switching from the second position to the first position, avoiding the problem of the armature assembly 110 being unable to switch.

[0063] Optionally, when the armature 111 is a flat plate structure, the length direction of the armature 111 is the X-axis direction, the thickness direction of the armature 111 is the Y-axis direction, and the width direction of the armature 111 is the Z-axis direction.

[0064] It should be noted that this application does not limit the fixing method of the permanent magnet 1121 and the armature 111, such as riveting the permanent magnet 1121 and the armature 111.

[0065] Optionally, the second magnetic conductor 123b of each coil assembly 120 has a flat plate structure, and the main plane of the second magnetic conductor 123b is perpendicular to the X-axis direction. The armature assembly 110 is movably located between the second magnetic conductor 123b of the first coil assembly 120a and the second magnetic conductor 123b of the second coil assembly 120b, and the two second magnetic conductors 123b are used to limit the range of motion of the armature assembly 110.

[0066] like Figure 2 and Figure 3As shown, the first magnetic conductor 123a extends from the corresponding core 121 along the Y-axis towards the armature assembly 110, and the end of the first magnetic conductor 123a has a first attraction surface 1231; when the armature assembly 110 is in the first position, the permanent magnet 1121 magnetically attracts the first attraction surface 1231 of the first coil assembly 120a and forms a magnetic pole surface; when the armature assembly 110 is in the second position, the permanent magnet 1121 magnetically attracts the first attraction surface 1231 of the second coil assembly 120b and forms a magnetic pole surface.

[0067] In this embodiment, by designing the first magnetic conductor 123a to extend along the Y-axis towards the armature assembly 110, the gap between the permanent magnet 1121 and the first magnetic conductor 123a is shortened, thereby increasing the attraction between the first magnetic conductor 123a and the permanent magnet 1121, and further increasing the holding force on the armature assembly 110. Furthermore, by extending the first magnetic conductor 123a along the Y-axis towards the armature assembly 110, while still providing the holding force, the thickness of the permanent magnet 1121 can be thinner. A thinner permanent magnet 1121 not only saves costs but also reduces the overall weight of the armature assembly 110, which is beneficial for improving the switching speed of the armature assembly 110.

[0068] Of course, in other embodiments, such as Figure 7 As shown, the first magnetic conductor 123a may not extend along the Y-axis towards the armature assembly 110, but rather in the X-axis direction, with the first magnetic conductor 123a and the corresponding core 121 arranged linearly. In this case, to ensure that the attraction between the first magnetic conductor 123a and the permanent magnet 1121 is sufficiently large, the thickness of the permanent magnet 1121 can be increased.

[0069] In one embodiment, when the armature assembly 110 is in the first position or the second position, there is a gap between the permanent magnet 1121 and each of the first attraction surfaces 1231.

[0070] For example, when the armature assembly 110 is in the first position, there is a gap between the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a and the first magnetic conductor 123a; when the armature assembly 110 is in the second position, there is a gap between the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b and the first magnetic conductor 123a.

[0071] In this embodiment, there is a gap between the permanent magnet 1121 and each of the first attraction surfaces 1231. This not only ensures that the permanent magnet 1121 can magnetically attract each of the first attraction surfaces 1231, but also prevents the permanent magnet 1121 from rubbing or even colliding with the first magnetic conductor 123a when the armature assembly 110 switches between the first position and the second position, thus ensuring the smooth movement of the armature assembly 110.

[0072] In one embodiment, the magnetization direction of the permanent magnet 1121 is parallel to the Y-axis direction.

[0073] Optionally, the first coil assembly 120a and the second coil assembly 120b are located on the same side of the armature assembly 110 along the Y-axis direction.

[0074] As a modified embodiment, the first coil assembly 120a and the second coil assembly 120b may be located on opposite sides of the armature assembly 110 along the Y-axis direction.

[0075] In one embodiment, when the armature assembly 110 moves between a first position and a second position, at least one first magnetic conductor 123a and the permanent magnet 1121 have overlapping regions on the plane where the armature 111 is located.

[0076] like Figure 2 As shown, when the armature assembly 110 is in the first position, the first magnetic conductor 123a of the first coil assembly 120a and the permanent magnet 1121 have an overlapping area on the plane where the armature 111 is located, while the first magnetic conductor 123a of the second coil assembly 120b and the permanent magnet 1121 do not have an overlapping area on the plane where the armature 111 is located.

[0077] like Figure 3 As shown, when the armature assembly 110 is in the second position, the first magnetic conductor 123a of the second coil assembly 120b and the permanent magnet 1121 have an overlapping area on the plane where the armature 111 is located, while the first magnetic conductor 123a of the first coil assembly 120a and the permanent magnet 1121 do not have an overlapping area on the plane where the armature 111 is located.

[0078] When the armature assembly 110 is in an intermediate position between the first position and the second position (e.g.) Figure 5 As shown), for example, when the armature assembly 110 switches from the first position to the second position, before the permanent magnet 1121 of the armature assembly 110 has completely moved out of the area covered by the first magnetic conductor 123a of the first magnetic conductor 123a of the first coil assembly 120a, the permanent magnet 1121 of the armature assembly 110 has entered the area covered by the first magnetic conductor 123a of the second coil assembly 120b.

[0079] Similarly, when the armature assembly 110 switches from the second position to the first position, before the permanent magnet 1121 of the armature assembly 110 has completely moved out of the area covered by the first magnetic conductor 123a of the second coil assembly 120b, the permanent magnet 1121 of the armature assembly 110 has entered the area covered by the first magnetic conductor 123a of the first coil assembly 120a.

[0080] Therefore, when the armature assembly 110 moves between the first position and the second position, the design of having an overlapping area between the orthogonal projections of at least one first magnetic conductor 123a and the permanent magnet 1121 on the plane where the armature 111 is located ensures that the permanent magnet 1121 is subjected to both attractive and repulsive forces when the armature assembly 110 is switched, which is beneficial to improving the switching speed of the armature assembly 110.

[0081] In one embodiment, the first coil assembly 120a and the second coil assembly 120b are arranged symmetrically. By symmetrically arranging the first coil assembly 120a and the second coil assembly 120b, the structures of the first coil assembly 120a and the second coil assembly 120b are identical, and the structure of the coil assembly 120 does not need to be differentiated, thus reducing manufacturing costs.

[0082] In one embodiment, of the magnetic conductors 123 at both ends of the core 121 of each coil assembly 120, one magnetic conductor 123 is integrally connected to the core 121, and the other magnetic conductor 123 is separately connected to the core 121.

[0083] In this embodiment, the magnetic conductor 123 at one end of the core 121 is integrally bent and connected to the core 121, while the magnetic conductor 123 at the other end is separately connected to the core 121. Compared with the scheme where the magnetic conductors 123 at both ends of the core 121 are separately connected, this embodiment saves one assembly process between the magnetic conductor 123 and the core 121, thereby reducing the impact of assembly errors on the movement stroke of the armature assembly 110.

[0084] Optionally, the first magnetic conductor 123a and the core 121 are integrally bent and connected, while the second magnetic conductor 123b and the core 121 are separately connected, for example, the second magnetic conductor 123b and the core 121 are riveted together.

[0085] Of course, in other embodiments, the second magnetic conductor 123b and the core 121 are integrally bent and connected, while the first magnetic conductor 123a and the core 121 are separately connected, for example, the first magnetic conductor 123a and the core 121 are riveted together.

[0086] Of course, in other embodiments where the first magnetic conductor 123a and the core 121 are integrally connected, the following approach can also be adopted. Figure 7 As shown in the diagram.

[0087] In one embodiment, the magnetic circuit structure further includes a limiting structure (not shown in the figure), which engages with the armature assembly 110 in the Y-axis direction. By providing the limiting structure, the armature assembly 110 can be prevented from wobbling along the Y-axis direction, ensuring that the armature assembly 110 can move along the X-axis direction. Furthermore, the limiting structure also ensures that a gap is maintained between the permanent magnet 1121 and each of the first attraction surfaces 1231.

[0088] It is understood that this application does not impose any particular limitations on the specific structure of the core 121 and the winding 122, for example, as Figure 8 As shown, each coil assembly 120 has one core 121, the cross-sectional shape of the core 121 is rectangular, and the winding 122 is wound around the outer periphery of the core 121.

[0089] Or, such as Figure 9 As shown, each coil assembly 120 includes a plurality of cores 121 arranged side by side, each core 121 having a circular cross-sectional shape, and a winding 122 is wound around the outer periphery of the plurality of cores 121.

[0090] Second Embodiment

[0091] like Figure 10 As shown, the similarities between the magnetic circuit structure of the second embodiment and the magnetic circuit structure of the first embodiment will not be repeated here. The differences are as follows: The armature 111 has a bent portion 1112 at both ends along the X-axis, and at least part of the bent portion 1112 is a suction portion 1111.

[0092] In this embodiment, by providing bent portions 1112 at both ends of the armature 111 along the X-axis, and at least a portion of the bent portions 1112 being attracting portions 1111, the bent attracting portions 1111 can have a larger attracting surface on the side facing the corresponding magnetic conductor 123, thereby increasing the attraction between the attracting portions 1111 and the corresponding magnetic conductor 123, which helps to improve the switching speed of the armature assembly 110.

[0093] Optionally, the bent portion 1112 may be bent in the direction of the Y-axis toward the coil assembly 120 or in the direction of the Y-axis away from the coil assembly 120.

[0094] Third Embodiment

[0095] like Figure 11 As shown, the similarities between the magnetic circuit structure of the third embodiment and the magnetic circuit structure of the first embodiment will not be repeated here. The differences are as follows: The second magnetic conductor 123b of the first coil assembly 120a and the second magnetic conductor 123b of the second coil assembly 120b are bent to form extensions 1232. The extensions 1232 of the two second magnetic conductors 123b extend along the X-axis and toward each other. The end of the extension 1232 has a second attraction surface 1233.

[0096] When the armature assembly 110 is in the first position, the attraction portion 1111 at one end of the armature 111 magnetically attracts the second attraction surface 1233 of the extension portion 1232 of the second magnetic conductor 123b of the first coil assembly 120a, and forms a magnetic pole surface; when the armature assembly 110 is in the second position, the attraction portion 1111 at the other end of the armature 111 magnetically attracts the second attraction surface 1233 of the extension portion 1232 of the second magnetic conductor 123b of the second coil assembly 120b, and forms a magnetic pole surface.

[0097] In this embodiment, the second magnetic conductor 123b of the first coil assembly 120a and the second magnetic conductor 123b of the second coil assembly 120b are bent to form extensions 1232 that are close to each other. As a result, the distance between the two second attraction surfaces 1233 is reduced, which shortens the size of the armature 111 along the X-axis. This helps to reduce the weight of the armature assembly 110 and thus improves the switching speed of the armature assembly 110.

[0098] In another aspect, this application also provides a relay, including the magnetic circuit structure of any of the above embodiments. The relay is a magnetic latching relay.

[0099] In summary, the magnetic circuit structure and relay of the embodiments of this application have at least the following advantages and beneficial effects: The magnetic circuit structure of this application embodiment, by setting multiple coil assemblies 120, and when the armature assembly 110 is in the first or second position, the magnetic circuit formed by the armature assembly 110 and the coil assembly 120 has multiple magnetic pole surfaces, making the attraction between the coil assembly 120 and the armature assembly 110 greater, thereby giving the magnetic circuit structure a greater holding force and improving its impact resistance. In addition, the first coil assembly 120a and the second coil assembly 120b are arranged at intervals along the X-axis direction, and the magnetic fields generated by the first coil assembly 120a and the second coil assembly 120b when energized are in the same direction, so that when the armature assembly 110 is switched, the first magnetic circuit and the second magnetic circuit can form a "one increasing and one decreasing" effect, thereby significantly shortening the time required for the switching action of the armature assembly 110, and having the advantage of rapid switching. Furthermore, during the switching of the armature assembly 110, one of the first coil assembly 120a and the second coil assembly 120b applies a repulsive force to the armature assembly 110, while the other applies an attractive force. These forces work together to drive the armature assembly 110 to move rapidly in the switching direction, enabling it to operate quickly and shortening the switching time. Additionally, the first coil assembly 120a and the second coil assembly 120b are spaced apart, increasing the distance between them and preventing their respective magnetic fields from interfering with each other, resulting in higher magnetic efficiency.

[0100] 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.

[0101] In the embodiments of this application, the term "multiple" refers to two or more, unless otherwise explicitly 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.

[0102] 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.

[0103] 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 magnetic circuit structure, characterized in that, It includes an armature assembly and multiple coil assemblies. The armature assembly includes a permanent magnet, and the multiple coil assemblies include a first coil assembly and a second coil assembly arranged at intervals along the X-axis. The magnetic fields generated by the first coil assembly and the second coil assembly are in the same direction when energized. When the first coil assembly and the second coil assembly are energized in the forward and reverse directions, they can drive the armature assembly to move linearly along the X-axis and enable the armature assembly to form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly respectively.

2. The magnetic circuit structure according to claim 1, characterized in that, Each coil assembly includes a core, a winding, and a magnetic conductor. The winding is wound around the core, and the magnetic conductor is provided at both ends of the core along the X-axis. The armature assembly also includes an armature element, and a permanent magnet is fixed to one side surface of the armature element facing the plurality of coil assemblies. The armature element is provided with an attraction portion at both ends along the X-axis. The armature assembly is movable between a first position and a second position. When the armature assembly is located in the first position, the attraction part and the permanent magnet at one end of the armature can magnetically attract the magnetic conductors at both ends of the core of the first coil assembly to form a first magnetic circuit. The first magnetic circuit includes two magnetic pole surfaces. When the armature assembly is in the second position, the attracting part and the permanent magnet at the other end of the armature can magnetically attract the magnetic conductors at both ends of the core of the second coil assembly to form a second magnetic circuit, the second magnetic circuit including two magnetic pole surfaces.

3. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductors provided at one end of the cores of the first coil assembly and the second coil assembly that are close to each other are defined as first magnetic conductors; each first magnetic conductor extends from the corresponding core along the Y-axis direction toward the armature assembly, and the end of the first magnetic conductor has a first attraction surface; the Y-axis direction is perpendicular to the X-axis direction; When the armature assembly is in the first position, the permanent magnet is magnetically attracted to the first contact surface of the first coil assembly to form a magnetic pole surface; when the armature assembly is in the second position, the permanent magnet is magnetically attracted to the first contact surface of the second coil assembly to form a magnetic pole surface.

4. The magnetic circuit structure according to claim 3, characterized in that, When the armature assembly is located in the first position or the second position, there is a gap between the permanent magnet and the corresponding first attraction surface.

5. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductors provided at the ends of the cores of the first coil assembly and the second coil assembly that are close to each other are defined as the first magnetic conductors, and the magnetic conductors provided at the ends that are far from each other are defined as the second magnetic conductors; the attracting portions at both ends of the armature along the X-axis direction are the first attracting portion and the second attracting portion, respectively. When the armature assembly is in the first position, the first attracting part contacts and magnetically attracts the second magnetic conductor of the first coil assembly, and the permanent magnet magnetically attracts the first magnetic conductor of the first coil assembly to form two of the magnetic pole surfaces, while the second attracting part separates from the second magnetic conductor of the second coil assembly. When the armature assembly is in the second position, the second engaging part contacts and magnetically engages with the second magnetic conductor of the second coil assembly, and the permanent magnet magnetically engages with the first magnetic conductor of the second coil assembly to form two other magnetic pole surfaces, while the first engaging part separates from the second magnetic conductor of the first coil assembly.

6. The magnetic circuit structure according to claim 5, characterized in that, When the armature assembly is located in the first position, the permanent magnet and the first magnetic conductor of the second coil assembly may or may not overlap in the orthographic projection on the plane where the armature is located. When the armature assembly is in the second position, the permanent magnet and the first magnetic conductor of the first coil assembly may or may not overlap in the orthographic projection on the plane where the armature is located.

7. The magnetic circuit structure according to claim 6, characterized in that, When the armature assembly is located in the first position, the area where the permanent magnet and the first magnetic conductor of the first coil assembly overlap on the orthographic projection of the armature component on the plane is defined as the first projection, and the area where the permanent magnet and the first magnetic conductor of the second coil assembly overlap on the orthographic projection of the armature component on the plane is defined as the second projection, and the area of ​​the first projection is greater than the area of ​​the second projection. When the armature assembly is in the second position, the area where the projection of the permanent magnet and the first magnetic conductor of the second coil assembly overlaps on the plane where the armature is located is defined as the third projection, and the area where the projection of the permanent magnet and the first magnetic conductor of the first coil assembly overlaps on the plane where the armature is located is defined as the fourth projection. The area of ​​the third projection is larger than the area of ​​the fourth projection.

8. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductors provided at the ends of the cores in the first coil assembly and the second coil assembly that are far apart from each other are defined as second magnetic conductors. The two second magnetic conductors are bent to form extensions. The extensions of the two second magnetic conductors extend along the X-axis and toward each other. The ends of the extensions have second attraction surfaces. When the armature assembly is in the first position, the attraction portion at one end of the armature magnetically engages with the second attraction surface of the extension portion of the second magnetic conductor of the first coil assembly to form a magnetic pole surface; when the armature assembly is in the second position, the attraction portion at the other end of the armature magnetically engages with the second attraction surface of the extension portion of the second magnetic conductor of the second coil assembly to form a magnetic pole surface.

9. The magnetic circuit structure according to claim 2, characterized in that, The armature has curved portions at both ends along the X-axis, and at least a portion of the curved portions is the suction portion.

10. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductors at both ends of the core of each coil assembly, wherein one magnetic conductor is integrally connected to the core, and the other magnetic conductor is separately connected to the core.

11. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductor located at one end of the core in the first coil assembly and the second coil assembly that is close to each other is defined as the first magnetic conductor. When the armature assembly moves between the first position and the second position, at least one of the first magnetic conductors and the permanent magnets have overlapping areas on the plane where the armature is located.

12. The magnetic circuit structure according to any one of claims 1-11, characterized in that, The magnetization direction of the permanent magnet is parallel to the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction.

13. The magnetic circuit structure according to any one of claims 1-11, characterized in that, The first coil assembly and the second coil assembly are located on the same side of the armature assembly along the Y-axis direction, which is perpendicular to the X-axis direction.

14. The magnetic circuit structure according to any one of claims 1-11, characterized in that, The first coil assembly and the second coil assembly are arranged symmetrically.

15. The magnetic circuit structure according to any one of claims 1-11, characterized in that, The magnetic circuit structure also includes a limiting structure, which is in a limiting engagement with the armature assembly in the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction.

16. A relay, characterized in that, Includes the magnetic circuit structure described in any one of claims 1-15.

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