Magnetic circuit structure and relay

Abstract

This application discloses a magnetic circuit structure and a relay. The magnetic circuit structure includes an armature assembly and multiple coil assemblies. 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 and second coil assemblies generate magnetic fields in the same direction. When the first and second coil assemblies are energized in the forward and reverse directions, they can drive the armature assembly to move linearly along the X-axis, enabling the armature assembly to form multiple magnetic pole surfaces with the first and second coil assemblies respectively. The armature assembly includes an armature element, a permanent magnet, and a magnetic conductor. The armature element is fixed to a first magnetic pole of the permanent magnet, and the magnetic conductor is fixed to a second magnetic pole of the permanent magnet. The first and second magnetic poles are arranged oppositely and have opposite polarities. The magnetic conductor is located between the first and second coil assemblies and can form magnetic pole surfaces with the first and second coil assemblies 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 multiple coil assemblies include a first coil assembly and a second coil assembly 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 direction, and enable the armature assembly to form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly respectively. The armature assembly includes an armature, a permanent magnet, and a magnetic conductor. The armature is fixed to a first magnetic pole of the permanent magnet, and the magnetic conductor is fixed to a second magnetic pole of the permanent magnet. The first magnetic pole and the second magnetic pole are opposite in orientation and polarity. The magnetic conductor is located between the first coil assembly and the second coil assembly, and the magnetic conductor can form the magnetic pole surface 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 fixed at both ends of the core along the X-axis. The magnetic conductor at the 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, and the magnetic conductor at the end that is far from each other is defined as a second magnetic conductor. The magnetic conductor is located between the two first magnetic conductors. The armature is provided with a pull-in portion at both ends along the X-axis, which is defined as a first pull-in portion and a second pull-in portion, respectively. The armature assembly is movable between a first position and a second position. When the armature assembly is located in the first position, the armature assembly and the first coil assembly form a first magnetic circuit, and the first attracting part contacts and magnetically attracts the second magnetic conductor of the first coil assembly, the magnetic conductor magnetically attracts the first magnetic conductor of the first coil assembly, and the first magnetic circuit includes at least two magnetic pole surfaces. When the armature assembly is in the second position, the armature assembly and the second coil assembly form a second magnetic circuit, and the second attraction part contacts and magnetically attracts the second magnetic conductor of the second coil assembly, and the magnetic conductor magnetically attracts the first magnetic conductor of the second coil assembly. The second magnetic circuit includes at least two magnetic pole surfaces.

[0008] According to some embodiments of this application, the magnetic conductive element and the orthographic projection of each of the first magnetic conductive bodies on the projection plane have an overlapping area, and the projection plane is perpendicular to the X-axis direction.

[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 second gap between the magnetic conductor and the corresponding first magnetic conductor.

[0010] According to some embodiments of this application, the magnetic conductive member includes a first magnetic conductive part and a second magnetic conductive part. The first magnetic conductive part is connected to the side surface of the permanent magnet facing away from the armature. The second magnetic conductive part is connected to the end of the first magnetic conductive part away from the permanent magnet. The second magnetic conductive part has a first protrusion and a second protrusion. The first protrusion extends out from one side of the first magnetic conductive part along the X-axis direction, and the second protrusion extends out from the other side of the first magnetic conductive part along the X-axis direction. When the armature assembly is in the first position, the first magnetically conductive part and the first extended part are magnetically attracted to the first magnetically conductive body of the first coil assembly, and respectively form the magnetic pole surface with the first magnetically conductive body of the first coil assembly; when the armature assembly is in the second position, the first magnetically conductive part and the second extended part are magnetically attracted to the first magnetically conductive body of the second coil assembly, and respectively form the magnetic pole surface with the first magnetically conductive body of the second coil assembly.

[0011] According to some embodiments of this application, the permanent magnet has a first permanent magnet part and a second permanent magnet part, the first permanent magnet part extending out of one side of the first magnetically conductive part along the X-axis direction, and the second permanent magnet part extending out of the other side of the second magnetically conductive part along the X-axis direction; The first permanent magnet part, the first magnetically conductive part, and the first protruding part form a first receiving cavity, and the second permanent magnet part, the first magnetically conductive part, and the second protruding part form a second receiving cavity; When the armature assembly is in the first position, at least a portion of the first magnetic conductor of the first coil assembly is located within the first receiving cavity; when the armature assembly is in the second position, at least a portion of the first magnetic conductor of the second coil assembly is located within the second receiving cavity.

[0012] According to some embodiments of this application, when the armature assembly is in the first position, there is a third gap between the first protrusion and the first magnetic conductor of the first coil assembly; when the armature assembly is in the second position, there is a fourth gap between the second protrusion and the first magnetic conductor of the second coil assembly.

[0013] 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 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 regions on the plane where the armature is located.

[0014] 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, while the other magnetic conductor is separately connected to the core.

[0015] 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.

[0016] 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.

[0017] According to some embodiments of this application, the two second magnetic conductors are respectively bent to form extensions, the extensions of the two second magnetic conductors extend along the X-axis and toward each other, and the ends of the extensions have second attraction surfaces. When the armature assembly is in the first position, the first engaging portion magnetically engages with the second engaging surface of the extension of the second magnetic conductor of the first coil assembly, forming the magnetic pole surface; when the armature assembly is in the second position, the second engaging portion magnetically engages with the second engaging surface of the extension of the second magnetic conductor of the second coil assembly, forming the magnetic pole surface.

[0018] 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.

[0019] According to some embodiments of this application, each of the first magnetic conductors extends from the corresponding core along the Y-axis direction toward the armature, and the end of each of the first magnetic conductors has a first attraction surface. The permanent magnet can form the magnetic pole surface with the first attraction surfaces of the two first magnetic conductors respectively, and the Y-axis direction is perpendicular to the X-axis direction. When the armature assembly is in the first position, the first magnetic circuit includes at least three magnetic pole surfaces; when the armature assembly is in the second position, the second magnetic circuit includes at least three magnetic pole surfaces.

[0020] According to some embodiments of this application, when the armature assembly is located in the first position or the second position, there is a first gap between the permanent magnet and the first attraction surface of the corresponding first magnetic conductor.

[0021] 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.

[0022] 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.

[0023] According to some embodiments of this application, the first coil assembly and the second coil assembly are arranged symmetrically.

[0024] 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.

[0025] The relays in this application include the magnetic circuit structure described in any of the above claims.

[0026] 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 coil assembly and the second coil assembly can drive the armature assembly to move linearly when energized in the forward and reverse directions, and the armature assembly can form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly respectively. Thus, the attraction between the armature assembly and the first coil assembly, or the attraction 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 can effectively resist external impact forces and prevent the relay from erroneously disconnecting or closing. Furthermore, by placing the magnetic conductor between the first coil assembly and the second coil assembly, on the one hand, the direction of the attraction between the magnetic conductor and the first coil assembly, and between the magnetic conductor and the second coil assembly, is basically along the X-axis direction, which is more conducive to improving the holding force; on the other hand, the magnetic conductor can guide the magnetic field originally located in the air between the first coil assembly and the second coil assembly into the magnetic circuit, avoiding magnetic leakage, increasing the magnetic flux in the magnetic circuit, and thus increasing the magnetic attraction force, thereby enhancing the holding force; furthermore, the magnetic conductor increases the magnetic pole surface, thereby increasing the attraction force during the switching process, which helps to improve the switching speed. The first and second coil assemblies are arranged at intervals along the X-axis, and the magnetic fields they generate when energized are in the same direction. This allows the armature assembly to switch, with one coil exerting a repulsive force on the armature assembly and the other an attractive force. These repulsive and attractive forces work together to drive the armature assembly to move rapidly in the switching direction, enabling quick action and shortening the switching time. Furthermore, the interval between the first and second coil assemblies increases the distance between them, preventing interference between their respective magnetic fields and resulting in higher magnetic efficiency. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

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

[0029] Figure 2 yes Figure 1 The front view, in which the armature assembly is in the first position.

[0030] Figure 3 yes Figure 1 The front view, with the armature assembly in the second position.

[0031] Figure 4This 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Figure 8 It is along Figure 2 A cross-sectional view of one embodiment of the AA section line.

[0036] Figure 9 It is along Figure 2 A cross-sectional view of another embodiment of the AA section line.

[0037] Figure 10 This is a schematic diagram of the magnetic circuit structure of the second embodiment of this application.

[0038] Figure 11 This is a schematic diagram of the magnetic circuit structure of the third embodiment of this application.

[0039] Figure 12 This is a three-dimensional schematic diagram of the magnetic circuit structure according to the fourth embodiment of this application.

[0040] Figure 13 yes Figure 12 The front view, in which the armature assembly is in the first position.

[0041] Figure 14 yes Figure 12 The front view, with the armature assembly in the second position.

[0042] Figure 15 This is a schematic diagram of the magnetic circuit when the armature assembly of the magnetic circuit structure of the fourth embodiment of this application is in the first position.

[0043] Figure 16 This is a schematic diagram of the magnetic circuit structure of the fourth embodiment of the present application when the armature assembly is located in the intermediate position between the first position and the second position.

[0044] Figure 17 This is a schematic diagram of the magnetic circuit when the armature assembly of the magnetic circuit structure of the fourth embodiment of this application is in the second position.

[0045] 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; 1121a. First permanent magnet part; 1121b. Second permanent magnet part; 113. Magnetic conductor; 1131. First magnetic conductor part; 1132. Second magnetic conductor part; 1132a. First protrusion part; 1132b. Second protrusion part; 114. First receiving cavity; 115. Second receiving cavity; 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

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] This application provides a magnetic circuit structure, including an armature assembly and multiple coil assemblies. 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. The armature assembly includes an armature element, a permanent magnet, and a magnetic conductor. The armature element is fixed to the first magnetic pole of the permanent magnet, and the magnetic conductor is fixed to the second magnetic pole of the permanent magnet. The first magnetic pole and the second magnetic pole are arranged oppositely and have opposite polarities. The magnetic conductor is located between the first coil assembly and the second coil assembly, and the magnetic conductor can form magnetic pole surfaces with the first coil assembly and the second coil assembly respectively.

[0052] 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, and enable the armature assembly to form multiple magnetic pole surfaces with the first coil assembly and the second coil assembly. Thus, the attraction between the armature assembly and the first coil assembly, or the attraction 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 can effectively resist external impact forces and prevent the relay from erroneously disconnecting or closing. Furthermore, by placing the magnetic conductor between the first coil assembly and the second coil assembly, on the one hand, the direction of the attraction between the magnetic conductor and the first coil assembly, and between the magnetic conductor and the second coil assembly, is basically along the X-axis direction, which is more conducive to improving the holding force; on the other hand, the magnetic conductor increases the magnetic pole surface, thereby increasing the attraction force during the switching process and helping to improve the switching speed; furthermore, the magnetic conductor can guide the magnetic field originally located in the air between the first coil assembly and the second coil assembly into the magnetic circuit, avoiding magnetic leakage, increasing the magnetic flux in the magnetic circuit, thereby increasing the magnetic attraction force and enhancing the holding force. The first and second coil assemblies are arranged at intervals along the X-axis, and the magnetic fields they generate when energized are in the same direction. This allows the armature assembly to switch, with one coil exerting a repulsive force on the armature assembly and the other an attractive force. These repulsive and attractive forces work together to drive the armature assembly to move rapidly in the switching direction, enabling quick action and shortening the switching time. Furthermore, the interval between the first and second coil assemblies increases the distance between them, preventing interference between their respective magnetic fields and resulting in higher magnetic efficiency.

[0053] Next, the magnetic circuit structure of the embodiments of this application will be described in detail with reference to the accompanying drawings.

[0054] First Embodiment

[0055] like Figures 1 to 3 As shown, the magnetic circuit structure of this embodiment includes an armature assembly 110 and multiple coil assemblies 120. The multiple coil assemblies 120 include a first coil assembly 120a and a second coil assembly 120b, which are arranged at intervals along the X-axis. 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. 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 positively and negatively energized, they can drive the armature assembly 110 to move linearly between a first position and a second position along the X-axis.

[0056] The armature assembly 110 includes an armature 111, a permanent magnet 1121, and a magnetic conductor 113. The armature 111 is fixed to a first magnetic pole of the permanent magnet 1121, and the magnetic conductor 113 is fixed to a second magnetic pole of the armature 111. The first and second magnetic poles are opposite in orientation and polarity. For example, one of the first and second magnetic poles is an N pole, and the other is a S pole. The magnetic conductor 113 is located between the first coil assembly 120a and the second coil assembly 120b, and the magnetic conductor 113 can form magnetic pole surfaces with the first coil assembly 120a and the second coil assembly 120b, respectively.

[0057] In one embodiment, the first and second magnetic poles are arranged along the Y-axis. In other words, the magnetization direction of the permanent magnet 1121 is parallel to the Y-axis.

[0058] When the armature assembly 110 is in the first position, the armature assembly 110 and the first coil assembly 120a form a first magnetic circuit Φ1 (e.g., Figure 4 When the armature assembly 110 is in the second position, the armature assembly 110 and the second coil assembly 120b form a second magnetic circuit Φ2 (e.g., Figure 6 ).

[0059] 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.

[0060] 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.

[0061] 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.

[0062] In detail, the core 121 of the first coil assembly 120a has a first magnetic conductor 123a and a second magnetic conductor 123b fixedly mounted at both ends along the X-axis. The first magnetic conductor 123a is located at the right end of the core 121, and the second magnetic conductor 123b is located at the left end of the core 121. Similarly, the core 121 of the second coil assembly 120b has a first magnetic conductor 123a and a second magnetic conductor 123b fixedly mounted at both ends along the X-axis. The first magnetic conductor 123a is located at the left end of the core 121, and the second magnetic conductor 123b is located at the right end of the core 121. The two first magnetic conductors 123a are close to each other along the X-axis, while the two second magnetic conductors 123b are far apart along the X-axis. A magnetic conductor 113 is located between the two first magnetic conductors 123a.

[0063] In one embodiment, the magnetic conductor 113 and each of the first magnetic conductors 123a have overlapping regions on a projection plane, and the projection plane is perpendicular to the X-axis direction. Thus, the magnetic conductor 113 and the first magnetic conductors 123a have overlapping portions in the X-axis direction, making the direction of the attraction force generated by the two more inclined towards the X-axis direction.

[0064] The armature 111 has two engaging portions 1111 at its two ends along the X-axis. The engaging portions 1111 at both ends of the armature 111 along the X-axis are a first engaging portion 1111a and a second engaging portion 1111b, respectively. The first engaging portion 1111a is located at the left end of the armature 111 along the X-axis, and the second engaging portion 1111b is located at the right end of the armature 111 along the X-axis. The first engaging portion 1111a can be magnetically engaged with the second magnetic conductor 123b of the first coil assembly 120a, and the second engaging portion 1111b can be magnetically engaged with the second magnetic conductor 123b of the second coil assembly 120b.

[0065] 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, forming a magnetic pole surface. The magnetic conductor 113 magnetically engages with the first magnetic conductor 123a of the first coil assembly 120a, forming another magnetic pole surface. The first magnetic circuit Φ1 includes these two magnetic pole surfaces.

[0066] When the armature assembly 110 is in the second position, the second engaging part 1111b contacts and magnetically engages with the second magnetic conductor 123b of the second coil assembly 120b, forming a magnetic pole surface. The magnetic conductor 113 magnetically engages with the first magnetic conductor 123a of the second coil assembly 120b, forming another magnetic pole surface. The second magnetic circuit Φ2 includes these two magnetic pole surfaces.

[0067] In other words, regardless of whether the armature assembly 110 is in the first position or the second position, at least two magnetic pole surfaces can be formed between the armature assembly 110 and the coil assembly. In one embodiment, as... Figure 2 and Figure 3 As shown, when the armature assembly 110 is in the first position, the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a magnetically attract each other to form a magnetic pole surface; when the armature assembly 110 is in the second position, the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b magnetically attract each other to form a magnetic pole surface.

[0068] In other words, in this embodiment, when the armature assembly 110 is in the first position, at least three magnetic pole surfaces are formed between the armature assembly 110 and the first coil assembly 120a. The three magnetic pole surfaces are: the magnetic pole surface formed between the first attracting part 1111a and the second magnetic conductor 123b of the first coil assembly 120a, the magnetic pole surface formed between the magnetic conductor 113 and the first magnetic conductor 123a of the first coil assembly 120a, and the magnetic pole surface formed between the permanent magnet 1121 and the first magnetic conductor 123a of the first coil assembly 120a.

[0069] Similarly, when the armature assembly 110 is in the second position, at least three magnetic pole surfaces are formed between the armature assembly 110 and the second coil assembly 120b. The three magnetic pole surfaces are: the magnetic pole surface formed between the second attraction part 1111b and the second magnetic conductor 123b of the second coil assembly 120b, the magnetic pole surface formed between the magnetic conductor 113 and the first magnetic conductor 123a of the second coil assembly 120b, and the magnetic pole surface formed between the permanent magnet 1121 and the first magnetic conductor 123a of the second coil assembly 120b.

[0070] In this embodiment, when the armature assembly 110 is in the holding state, both the permanent magnet 1121 and the magnetic conductor 113 can be magnetically attracted to the corresponding first magnetic conductor 123a. By increasing the number of magnetic pole surfaces, not only can the holding force be improved, but also, during switching, when the holding forces of the first coil assembly 120a and the armature assembly 110 are canceled out, the magnetic conductor 113 gradually approaches the second coil assembly 120b, and a magnetic pole surface can be formed between the magnetic conductor 113 and the second coil assembly 120b. By introducing the magnetic conductor 113, the process attraction force during the switching action of the armature assembly 110 can be improved, thereby increasing the switching speed of the armature assembly 110.

[0071] In one embodiment, 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 and the first attraction surface 1231 of the first coil assembly 120a magnetically attract each other to form a magnetic pole surface; when the armature assembly 110 is in the second position, the permanent magnet 1121 and the first attraction surface 1231 of the second coil assembly 120b magnetically attract each other to form a magnetic pole surface.

[0072] 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.

[0073] 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.

[0074] 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 magnetic conductor 113 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 multiple 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.

[0075] Furthermore, since the magnetic conductor 113 is located between the two first magnetic conductors 123a, the direction of the attraction force formed between the magnetic conductor 113 and each of the first magnetic conductors 123a is basically along the X-axis, that is, the direction of the attraction force is horizontal, which is more conducive to improving the holding force.

[0076] Furthermore, the magnetic conductor 113 is located between the first magnetic conductor 123a of the first coil assembly 120a and the first magnetic conductor 123a of the second coil assembly 120b, so that the magnetic conductor 113 can guide the magnetic field in the air that was originally located between the two first magnetic conductors 123a into the magnetic circuit, avoid magnetic leakage, increase the magnetic flux in the magnetic circuit, and thus increase the magnetic attraction between the magnetic conductor 113 and the first magnetic conductor 123a, further increasing the holding force on the armature assembly 110.

[0077] 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 Φ2 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, the magnetic conductor 113 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, the magnetic conductor 113 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. Therefore, 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.

[0078] 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.

[0079] 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. The permanent magnet 1121, the magnetic conductor 113 and the first magnetic conductor 123a of the second coil assembly 120b are magnetically attracted and form two magnetic pole surfaces, so that the armature assembly 110 and the second coil assembly 120b form a second magnetic circuit Φ2.

[0080] 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.

[0081] 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, when the armature assembly 110 is switched, 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 to the armature assembly 110. The force and the attraction can work together to drive the armature assembly 110 to move quickly in the switching direction, so that the armature assembly 110 can move quickly and the switching time is shortened.

[0082] Furthermore, since the magnetic conductor 113 is located between the two first magnetic conductors 123a, the direction of the attraction force formed between the magnetic conductor 113 and each of the first magnetic conductors 123a is basically along the X-axis, that is, the direction of the attraction force is horizontal, which is more conducive to improving the holding force. In addition, the magnetic conductor 113 can guide the magnetic field in the air originally located between the two first magnetic conductors 123a into the magnetic circuit, avoid magnetic leakage, increase the magnetic flux in the magnetic circuit, and thus increase the magnetic attraction force between the magnetic conductor 113 and the first magnetic conductors 123a, further increasing the holding force on the armature assembly 110.

[0083] 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.

[0084] The magnetic guide 113 is fixedly connected to the permanent magnet 1121. As an example, the magnetic guide 113 is connected to the middle position of the permanent magnet 1121 along the X-axis direction. In one embodiment, the magnetic guide 113 is made of a magnetically conductive material.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] In one embodiment, when the armature assembly 110 is in the first position or the second position, there is a first gap between the permanent magnet 1121 and each of the first attraction surfaces 1231.

[0094] For example, when the armature assembly 110 is in the first position, there is a first gap between the permanent magnet 1121 and the first magnetic contact surface 1231 of the first magnetic conductor 123a of the first coil assembly 120a; when the armature assembly 110 is in the second position, there is a first gap between the permanent magnet 1121 and the first magnetic contact surface 1231 of the first magnetic conductor 123a of the second coil assembly 120b.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] like Figure 3As 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.

[0100] 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 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.

[0101] 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.

[0102] 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.

[0103] In one embodiment, when the armature assembly 110 is in the first or second position, there is a second gap between the magnetic guide 113 and the corresponding first magnetic guide 123a. Taking the armature assembly 110 in the first position as an example, at this time, the first engaging portion 1111a contacts and magnetically engages with the second magnetic guide 123b of the first coil assembly 120a, while there is a gap between the magnetic guide 113 and the first magnetic guide 123a of the first coil assembly 120a, and they are magnetically engaged. The advantage of this design is that the accuracy of the switching stroke of the armature assembly 110 can be ensured by controlling the installation accuracy of the first engaging portion 1111a and the second magnetic guide 123b, without having to control the installation accuracy of the magnetic guide 113 and the first magnetic guide 123a, which greatly reduces the requirements for part machining accuracy and significantly reduces manufacturing costs.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] Second Embodiment

[0114] 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.

[0115] 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 attractive portions 1111, the bent attractive portions 1111 can have a larger attractive surface on the side facing the corresponding magnetic conductor 123, thereby increasing the attraction between the attractive portions 1111 and the corresponding magnetic conductor 123, which helps to improve the switching speed of the armature assembly 110.

[0116] 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.

[0117] Third Embodiment

[0118] 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.

[0119] 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.

[0120] 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.

[0121] Fourth embodiment

[0122] like Figures 12 to 17 As shown, the similarities between the magnetic circuit structure of the fourth embodiment and the magnetic circuit structure of the third embodiment will not be repeated here. The difference lies in the structure of the magnetic conductor 113.

[0123] like Figures 12 to 14 As shown, the magnetic conductive member 113 includes a first magnetic conductive part 1131 and a second magnetic conductive part 1132. The first magnetic conductive part 1131 is connected to the side surface of the permanent magnet 1121 facing away from the armature 111. The second magnetic conductive part 1132 is connected to the end of the first magnetic conductive part 1131 away from the permanent magnet 1121. The second magnetic conductive part 1132 has a first protrusion 1132a and a second protrusion 1132b. The first protrusion 1132a protrudes from one side of the first magnetic conductive part 1131 along the X-axis direction, and the second protrusion 1132b protrudes from the other side of the first magnetic conductive part 1131 along the X-axis direction.

[0124] like Figure 15 As shown, when the armature assembly 110 is in the first position, the first magnetically conductive part 1131, the first protruding part 1132a, and the permanent magnet 1121 are magnetically attracted to the first magnetically conductive part 123a of the first coil assembly 120a, and respectively form magnetic pole surfaces with the first magnetically conductive part 123a of the first coil assembly 120a; as Figure 17 As shown, when the armature assembly 110 is in the second position, the first magnetic conductive part 1131, the second protruding part 1132b and the permanent magnet 1121 are magnetically attracted to the first magnetic conductive part 123a of the second coil assembly 120b, and form magnetic pole surfaces with the first magnetic conductive part 123a of the second coil assembly 120b.

[0125] In this embodiment, the magnetic conductor 113 includes a first magnetic conductor 1131 and a second magnetic conductor 1132. The first protrusion 1132a and the second protrusion 1132b of the second magnetic conductor 1132 extend from both sides of the first magnetic conductor 1131 along the X-axis direction, so that the magnetic conductor 113 forms a T-shaped structure. The area of ​​the attraction surface of the magnetic conductor 113 with the T-shaped structure is increased, which increases the attraction force during the switching process of the armature assembly 110 and improves the switching speed of the armature assembly 110.

[0126] like Figure 13As shown, the permanent magnet 1121 has a first permanent magnet part 1121a and a second permanent magnet part 1121b. The first permanent magnet part 1121a extends out from one side of the first magnetically conductive part 1131 along the X-axis direction, and the second permanent magnet part 1121b extends out from the other side of the second magnetically conductive part 1132 along the X-axis direction. The first permanent magnet part 1121a and the first extended part 1132a are arranged opposite to each other in the Y-axis direction, and the second permanent magnet part 1121b and the second extended part 1132b are arranged opposite to each other in the Y-axis direction.

[0127] The first permanent magnet part 1121a, the first magnetic conductive part 1131 and the first protrusion part 1132a form a first receiving cavity 114, and the second permanent magnet part 1121b, the first magnetic conductive part 1131 and the second protrusion part 1132b form a second receiving cavity 115.

[0128] When the armature assembly 110 is in the first position, at least a portion of the first magnetic conductor 123a of the first coil assembly 120a is located in the first receiving cavity 114; when the armature assembly 110 is in the second position, at least a portion of the first magnetic conductor 123a of the second coil assembly 120b is located in the second receiving cavity 115.

[0129] In this embodiment, when the armature assembly 110 is in the first position, the first permanent magnet portion 1121a, the first magnetically conductive portion 1131, and the first protrusion 1132a surround at least a portion of the first magnetically conductive body 123a of the first coil assembly 120a; when the armature assembly 110 is in the second position, the second permanent magnet portion 1121b, the first magnetically conductive portion 1131, and the second protrusion 1132b surround at least a portion of the first magnetically conductive body 123a of the second coil assembly 120b. On the one hand, the permanent magnet 1121 and the magnetically conductive member 113 substantially surround the pole face of the first magnetically conductive body 123a, reducing magnetic leakage and increasing the magnetic flux in the magnetic circuit, thereby increasing the magnetic attraction between the permanent magnet 1121, the magnetically conductive member 113, and the first magnetically conductive body 123a, further increasing the holding force on the armature assembly 110; on the other hand... On the one hand, the permanent magnet 1121, the first magnetic conductive part 1131 and the second magnetic conductive part 1132 roughly form an I-shaped structure. By adjusting the gap between the second magnetic conductive part 1132 and the first magnetic conductive part 123a and between the permanent magnet 1121 and the first magnetic conductive part 123a, the attraction between the permanent magnet 1121 and the first magnetic conductive part 123a and the attraction between the second magnetic conductive part 1132 and the first magnetic conductive part 123a can be adjusted so that the attraction in the Y-axis direction of the armature assembly 110 cancels each other out, so that the armature assembly 110 is only attracted in the X-axis direction and not attracted in the Y-axis direction. This ensures that the armature assembly 110 can move along the X-axis direction and will not float in the Y-axis direction, thus avoiding an increase in the frictional resistance of the armature assembly 110 due to the floating of the armature assembly 110.

[0130] In one embodiment, when the armature assembly 110 is in the first position, there is a third gap between the first protrusion 1132a and the first magnetic conductor 123a of the first coil assembly 120a; when the armature assembly 110 is in the second position, there is a fourth gap between the second protrusion 1132b and the first magnetic conductor 123a of the second coil assembly 120b.

[0131] In this embodiment, the first protrusion 1132a has a third gap with the first magnetic conductor 123a of the first coil assembly 120a, and the second protrusion 1132b has a fourth gap with the first magnetic conductor 123a of the second coil assembly 120b. While ensuring that the first protrusion 1132a and the second protrusion 1132b are magnetically attracted to the corresponding first magnetic conductor 123a, it can also prevent the first protrusion 1132a and the second protrusion 1132b from rubbing or even colliding with the corresponding 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.

[0132] It should be added that the limiting structure can also ensure that the first protrusion 1132a and the first magnetic conductor 123a of the first coil assembly 120a have a third gap, and that the second protrusion 1132b and the first magnetic conductor 123a of the second coil assembly 120b have a fourth gap.

[0133] It should be noted that the second magnetic conductor 123b in this embodiment can also be adopted. Figure 2 The armature 111 can also be adopted in the structure shown. Figure 10 The structure shown can also be used for the first magnetic conductor 123a. Figure 7 The structure shown.

[0134] 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.

[0135] In summary, the magnetic circuit structure and relay of the embodiments of this application have at least the following advantages and beneficial effects: In the magnetic circuit structure of this application embodiment, the first coil assembly 120a and the second coil assembly 120b can drive the armature assembly 110 to move in a straight line when energized in the forward and reverse directions, and enable the armature assembly 110 to form multiple magnetic pole surfaces with the first coil assembly 120a and the second coil assembly 120b respectively. In this way, the attraction between the armature assembly 110 and the first coil assembly 120a, or the attraction between the armature assembly 110 and the second coil assembly 120b, is greater. As a result, the magnetic circuit structure has a larger holding force. The larger holding force can effectively resist external impact forces and prevent the relay from being accidentally disconnected or closed. Furthermore, by placing the magnetic conductor 113 between the first coil assembly 120a and the second coil assembly 120b, on the one hand, the direction of the attraction force formed between the magnetic conductor 113 and the first coil assembly 120a, and between the magnetic conductor 113 and the second coil assembly 120b, is basically along the X-axis, which is more conducive to improving the holding force; on the other hand, the magnetic conductor 113 increases the magnetic pole surface, thereby increasing the attraction force during the switching process, which helps to improve the switching speed; and on the other hand, the magnetic conductor 113 can guide the magnetic field in the air that was originally located between the first coil assembly 120a and the second coil assembly 120b into the magnetic circuit, avoiding magnetic leakage, increasing the magnetic flux in the magnetic circuit, thereby increasing the magnetic attraction force, and thus enhancing the holding force. The first coil assembly 120a and the second coil assembly 120b are arranged at intervals along the X-axis, and the magnetic fields they generate when energized are in the same direction. This allows the armature assembly 110 to switch, with one of the first coil assembly 120a and the other applying a repulsive force to the armature assembly 110, while the other applies an attractive force. These repulsive and attractive 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. Furthermore, the intervals between the first coil assembly 120a and the second coil assembly 120b increase the distance between them, preventing their respective magnetic fields from interfering with each other and resulting in higher magnetic efficiency.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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 multiple coil assemblies include a first coil assembly and a second coil assembly arranged at intervals along the X-axis. When the first coil assembly and the second coil assembly are energized, the magnetic field generated by them is 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. The armature assembly includes an armature, a permanent magnet, and a magnetic conductor. The armature is fixed to a first magnetic pole of the permanent magnet, and the magnetic conductor is fixed to a second magnetic pole of the permanent magnet. The first magnetic pole and the second magnetic pole are opposite in orientation and polarity. The magnetic conductor is located between the first coil assembly and the second coil assembly, and the magnetic conductor can form the magnetic pole surface 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 fixed at both ends of the core along the X-axis. The magnetic conductor at the 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, and the magnetic conductor at the end that is far from each other is defined as a second magnetic conductor. The magnetic conductor is located between the two first magnetic conductors. The armature has a pull-in portion at both ends along the X-axis, which is defined as a first pull-in portion and a second pull-in portion, respectively. The armature assembly is movable between a first position and a second position. When the armature assembly is located in the first position, the armature assembly and the first coil assembly form a first magnetic circuit, and the first attracting part contacts and magnetically attracts the second magnetic conductor of the first coil assembly, the magnetic conductor magnetically attracts the first magnetic conductor of the first coil assembly, and the first magnetic circuit includes at least two magnetic pole surfaces. When the armature assembly is in the second position, the armature assembly and the second coil assembly form a second magnetic circuit, and the second attraction part contacts and magnetically attracts the second magnetic conductor of the second coil assembly, and the magnetic conductor magnetically attracts the first magnetic conductor of the second coil assembly. The second magnetic circuit includes at least two magnetic pole surfaces.

3. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductive element and the orthographic projection of each of the first magnetic conductive bodies on the projection plane have an overlapping area, and the projection plane is perpendicular to the X-axis direction.

4. The magnetic circuit structure according to claim 2, characterized in that, When the armature assembly is located in the first position or the second position, there is a second gap between the magnetic conductor and the corresponding first magnetic conductor.

5. The magnetic circuit structure according to claim 2, characterized in that, The magnetic conductive component includes a first magnetic conductive part and a second magnetic conductive part. The first magnetic conductive part is connected to the side surface of the permanent magnet facing away from the armature. The second magnetic conductive part is connected to the end of the first magnetic conductive part away from the permanent magnet. The second magnetic conductive part has a first protrusion and a second protrusion. The first protrusion extends out from one side of the first magnetic conductive part along the X-axis direction, and the second protrusion extends out from the other side of the first magnetic conductive part along the X-axis direction. When the armature assembly is in the first position, the first magnetically conductive part and the first extended part are magnetically attracted to the first magnetically conductive body of the first coil assembly, and respectively form the magnetic pole surface with the first magnetically conductive body of the first coil assembly; when the armature assembly is in the second position, the first magnetically conductive part and the second extended part are magnetically attracted to the first magnetically conductive body of the second coil assembly, and respectively form the magnetic pole surface with the first magnetically conductive body of the second coil assembly.

6. The magnetic circuit structure according to claim 5, characterized in that, The permanent magnet has a first permanent magnet part and a second permanent magnet part. The first permanent magnet part extends out of one side of the first magnetically conductive part along the X-axis direction, and the second permanent magnet part extends out of the other side of the second magnetically conductive part along the X-axis direction. The first permanent magnet part, the first magnetically conductive part, and the first protruding part form a first receiving cavity, and the second permanent magnet part, the first magnetically conductive part, and the second protruding part form a second receiving cavity; When the armature assembly is in the first position, at least a portion of the first magnetic conductor of the first coil assembly is located within the first receiving cavity; when the armature assembly is in the second position, at least a portion of the first magnetic conductor of the second coil assembly is located within the second receiving cavity.

7. The magnetic circuit structure according to claim 6, characterized in that, When the armature assembly is in the first position, there is a third gap between the first protrusion and the first magnetic conductor of the first coil assembly; when the armature assembly is in the second position, there is a fourth gap between the second protrusion and the first magnetic conductor of the second coil assembly.

8. The magnetic circuit structure according to claim 2, characterized in that, 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 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 regions on the plane where the armature is located.

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

10. The magnetic circuit structure according to claim 2, 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.

11. The magnetic circuit structure according to claim 10, 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.

12. The magnetic circuit structure according to claim 2, characterized in that, The two second magnetic conductors are bent to form extensions, and the extensions of the two second magnetic conductors extend along the X-axis and toward each other, and the ends of the extensions have second attraction surfaces. When the armature assembly is in the first position, the first engaging portion magnetically engages with the second engaging surface of the extension of the second magnetic conductor of the first coil assembly, forming the magnetic pole surface; when the armature assembly is in the second position, the second engaging portion magnetically engages with the second engaging surface of the extension of the second magnetic conductor of the second coil assembly, forming the magnetic pole surface.

13. 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.

14. The magnetic circuit structure according to claim 2, characterized in that, Each of the first magnetic conductors extends from the corresponding core along the Y-axis towards the armature. Each of the first magnetic conductors has a first attraction surface at its end. The permanent magnet can form the magnetic pole surface with the first attraction surfaces of the two first magnetic conductors respectively. The Y-axis direction is perpendicular to the X-axis direction. When the armature assembly is in the first position, the first magnetic circuit includes at least three magnetic pole surfaces; when the armature assembly is in the second position, the second magnetic circuit includes at least three magnetic pole surfaces.

15. The magnetic circuit structure according to claim 14, characterized in that, When the armature assembly is located in the first position or the second position, there is a first gap between the permanent magnet and the first attraction surface of the corresponding first magnetic conductor.

16. The magnetic circuit structure according to any one of claims 1-15, 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.

17. The magnetic circuit structure according to any one of claims 1-15, 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.

18. The magnetic circuit structure according to any one of claims 1-15, characterized in that, The first coil assembly and the second coil assembly are arranged symmetrically.

19. The magnetic circuit structure according to any one of claims 1-15, 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.

20. A relay, characterized in that, Includes the magnetic circuit structure as described in any one of claims 1-19.

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