Magnetic circuit structure and magnetic latching relay

Abstract

The application relates to a magnetic circuit structure and a magnetic latching relay. The magnetic circuit structure comprises a coil holder, the coil holder being provided with a mounting hole; a static iron core, which is arranged on the coil holder and located in the mounting hole, the static iron core being provided with a matching protrusion; and a moving iron core, which is movably arranged in the mounting hole, the side of the moving iron core facing the static iron core being provided with a matching groove, and the side of the matching groove facing the static iron core being provided with a guide groove; wherein when the moving iron core moves along the height direction, the matching groove can cover or separate from the matching protrusion, so that the moving iron core and the static iron core are attracted or separated. In this way, the matching groove and the matching protrusion can improve the initial attraction force when the moving iron core and the static iron core are closed, and can also guide the movement of the moving iron core, avoid the movement of the moving iron core in the mounting hole from being inclined, and further avoid the abrasion between the moving iron core and the coil holder, thereby improving the reliability of the magnetic latching relay.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a magnetic circuit structure and a magnetic latching 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] Typically, a magnetic latching relay is a type of relay that includes at least a moving iron core, a stationary iron core, a moving contact, and a stationary contact. The moving iron core and the stationary iron core can separate or engage to control the contact or separation of the moving contact and the stationary contact, thereby achieving the closing or opening control of the magnetic latching relay.

[0004] Currently, the initial attraction between the moving iron core and the stationary iron core in the magnetic circuit structure is small, which makes it difficult for the moving iron core and the stationary iron core to engage. Moreover, when the moving iron core and the stationary iron core engage, the moving iron core is prone to tilting, which causes wear on the inner wall of the coil frame and affects the accuracy of the engagement between the moving iron core and the stationary iron core. Utility Model Content

[0005] Therefore, it is necessary to address the problems of low initial attraction between the moving iron core and the stationary iron core in current magnetic latching relays, as well as the easy wear between the moving iron core and the coil frame. This new magnetic circuit structure and magnetic latching relay can facilitate the engagement of the moving iron core and the stationary iron core, avoid wear between the moving iron core and the coil frame, ensure the accuracy of the moving iron core's operation, and improve the reliability of the magnetic latching relay.

[0006] A magnetic circuit structure is used in a magnetic latching relay, the magnetic circuit structure comprising:

[0007] A coil holder having a mounting hole extending through the height direction;

[0008] A stationary iron core is disposed on the coil frame and located in the mounting hole, and the stationary iron core has a mating protrusion;

[0009] The moving iron core is movably installed through the mounting hole and partially exposed in the coil frame. The moving iron core and the stationary iron core are arranged opposite each other along the height direction. The moving iron core has a mating groove on the side facing the stationary iron core, and the mating groove has a guide groove on the side facing the stationary iron core. The guide groove can guide the mating protrusion to be installed in the mating groove.

[0010] When the moving iron core moves along the height direction, the mating groove can cover or detach from the mating protrusion, so that the moving iron core can be attracted to or separated from the stationary iron core.

[0011] In this way, the guide groove guides the mating protrusion to be installed in the mating groove, so that the moving iron core and the stationary iron core can engage through the mating groove and the mating protrusion. This increases the magnetic conductive area, reduces the magnetic gap when the moving iron core and the stationary iron core separate, thereby increasing the initial attraction when the moving iron core and the stationary iron core close, and shortening the operating time of the magnetic latching relay. At the same time, when the moving iron core moves closer to or away from the stationary iron core along the height direction, the mating groove can move along the mating protrusion to guide the movement of the moving iron core, preventing the moving iron core from tilting in the mounting hole, thus preventing wear between the moving iron core and the coil frame, ensuring the accuracy of the moving iron core's operation, and improving the reliability of the magnetic latching relay.

[0012] In one embodiment of this application, the dimension of the mating protrusion along the height direction is adapted to the depth of the mating groove along the height direction;

[0013] And / or, the mating protrusion is located at the center of the mounting hole along the height direction.

[0014] This increases the contact area between the protrusion and the groove, increases the magnetic flux density per unit area of ​​the contact area, thereby improving the holding force between the moving iron core and the stationary iron core. At the same time, it reduces the attraction of the stationary iron core on the product, improving reliability.

[0015] In one embodiment of this application, the moving iron core includes a first iron core body and a second iron core body connected along the height direction;

[0016] The mounting hole includes a first main body hole and a second main body hole that are connected along the axial direction. The stationary iron core is at least partially located in the first main body hole, and the second iron core body is located in the first main body hole. The first iron core body extends out through the second main body hole.

[0017] The mating groove is provided in the second iron core body.

[0018] In this way, the moving iron core is attracted to or separated from the stationary iron core through the second iron core body in the first main body hole, and the moving contact moves through the first iron core body passing through the second main body hole.

[0019] In one embodiment of this application, the outer diameter of the second iron core body is larger than the outer diameter of the first iron core body, forming a first limiting step;

[0020] The inner diameter of the first main body hole is larger than the inner diameter of the second main body hole to form a second limiting step. The second limiting step can abut against the first limiting step to limit the movement of the moving iron core when it is separated from the stationary iron core.

[0021] In this way, the position of the moving iron core in the height direction can be limited, so that the moving iron core can be in the initial position after separating from the stationary iron core, avoiding excessive rise of the moving iron core. While ensuring the separation of the moving iron core and the stationary iron core, the magnetic gap between the moving iron core and the stationary iron core is reduced, thereby increasing the initial attraction between the moving iron core and the stationary iron core.

[0022] In one embodiment of this application, the height of the second iron core body along the height direction is 1 / 4 to 1 / 2 of the height of the moving iron core;

[0023] And / or, there is a preset gap between the outer surface of the second core body and the inner wall of the mounting hole.

[0024] This prevents the moving iron core from shaking and reduces jamming during its movement.

[0025] In one embodiment of this application, the magnetic circuit structure includes an elastic element, which is sleeved on the stationary iron core and located in the mounting hole. The elastic element can also abut against the moving iron core.

[0026] The elastic force of the elastic element enables the moving iron core to separate from the stationary iron core.

[0027] In this way, the elastic element can push the moving iron core to reset, thus making the movement stroke of the moving iron core controllable.

[0028] In one embodiment of this application, the moving iron core further includes a third iron core body, which is disposed on the side of the second iron core body away from the first iron core body;

[0029] The outer diameter of the third iron core body is smaller than the outer diameter of the second iron core body, and the elastic element can be at least partially sleeved on the third iron core body when the moving iron core and the stationary iron core are attracted together.

[0030] In this way, the third core body can guide the elastic element and prevent it from bending.

[0031] In one embodiment of this application, the stationary iron core further includes a mounting base and a first mounting protrusion, and the mounting hole also has a third main body hole, which is located at the end of the first main body hole away from the second main body hole and communicates with the first main body hole;

[0032] The mounting base is located in the third main body hole, the first mounting protrusion is disposed on the mounting base and located in the first main body hole, the elastic element is at least partially sleeved on the first mounting protrusion, and the moving iron core can abut against the first mounting protrusion when it is attracted to the stationary iron core.

[0033] Thus, the stationary iron core is installed by mounting the base, and the elastic element is installed by the first mounting protrusion, so that the moving iron core can accurately engage or disengage with the stationary iron core.

[0034] In one embodiment of this application, the inner diameter of the third main body hole is larger than the inner diameter of the first main body hole to form a third limiting step, and the mounting base abuts against the third limiting step.

[0035] This allows the stationary iron core to be reliably installed in the coil frame, reducing magnetic leakage.

[0036] In one embodiment of this application, the magnetic circuit structure further includes a magnet disposed in the third main body hole and located on the side of the stationary iron core away from the moving iron core.

[0037] In this way, the magnet can generate attraction, providing initial attraction for the moving iron core, thereby increasing the initial attraction of the magnetic latching relay, reducing the energy consumption when the moving iron core and the stationary iron core are engaged, facilitating the engagement of the moving iron core and the stationary iron core, and shortening the action time and release time of the magnetic latching relay.

[0038] In one embodiment, the magnetic circuit structure further includes a yoke and a mounting plate. The mounting plate is disposed on the yoke and together with the yoke forms an installation space. The coil frame is disposed in the installation space and abuts against the yoke and the mounting plate in the height direction. The moving iron core passes through the mounting plate to extend out of the installation space.

[0039] In this way, the coil frame can be fixed between the yoke and the mounting plate.

[0040] In one embodiment, the sum of the height dimension of the mounting base and the height dimension of the magnet is greater than the depth of the third main hole, so that the magnet abuts against the yoke.

[0041] In this way, the stationary iron core and the magnet can be reliably installed in the coil frame.

[0042] In one embodiment of this application, the stationary iron core further includes a second mounting protrusion, which is disposed between the first mounting protrusion and the mounting base. The outer diameter of the second mounting protrusion is larger than the outer diameter of the first mounting protrusion, and is used to support the elastic member.

[0043] Thus, the elastic element is installed by supporting it with the second mounting protrusion.

[0044] A magnetic latching relay includes a connection assembly, a contact assembly, and a magnetic circuit structure as described in any of the above technical features;

[0045] The connecting component is disposed at one end of the moving iron core extending out of the coil frame in the magnetic circuit structure. The contact component includes a moving contact and a stationary contact. The moving contact is disposed in the connecting component. The stationary contact and the moving contact are arranged opposite to each other along the height direction.

[0046] The moving iron core can drive the connecting component and the moving contact to move along the height direction, so that the moving contact can contact or separate from the stationary contact.

[0047] By adopting the above-mentioned magnetic circuit structure, the magnetic latching relay can accurately engage the moving iron core and the stationary iron core, thereby improving the reliability of the magnetic latching relay. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the magnetic circuit structure according to an embodiment of this application.

[0049] Figure 2 for Figure 1 The diagram shows a magnetic circuit structure applied to a magnetic latching relay.

[0050] Figure 3 for Figure 2 The diagram shown is an exploded view of a magnetic latching relay.

[0051] Figure 4 for Figure 1 The cross-sectional view of the magnetic circuit structure shown.

[0052] Figure 5 for Figure 4 The magnetic circuit structure shown is a cross-sectional view at point AA.

[0053] Figure 6 for Figure 4 The diagram shows the moving iron core and the stationary iron core in the magnetic circuit structure.

[0054] Wherein: 10, magnetic latching relay; 100, magnetic circuit structure; 110, coil frame; 111, mounting hole; 1111, first main body hole; 1112, second main body hole; 1113, third main body hole; 1114, second limiting step; 120, stationary iron core; 121, mating protrusion; 122, mounting base; 123, first mounting protrusion; 124, second mounting protrusion; 130, moving iron core; 131. Matching groove; 1311, guide groove; 132, first iron core body; 133, second iron core body; 134, first limiting step; 135, third iron core body; 140, coil; 150, elastic element; 160, magnet; 170, yoke; 180, mounting plate; 200, connecting assembly; 300, contact assembly; 310, moving contact; 320, stationary contact; 400, base plate; 500, lead-out end. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0061] A relay is an electronic control device. Typically, a magnetic latching relay is a type of relay, which includes at least a moving iron core, a stationary iron core, an elastic element, a moving contact, and a stationary contact. The moving and stationary iron cores can separate or engage to control the contact or separation of the moving and stationary contacts, thereby achieving the closing or opening control of the magnetic latching relay. Currently, the initial attraction between the moving and stationary iron cores in the magnetic circuit structure is small, making it difficult for them to engage. Moreover, when the moving and stationary iron cores engage, the moving iron core is prone to tilting, causing wear between the moving iron core and the inner wall of the coil frame, affecting the accuracy of the engagement.

[0062] For this purpose, please refer to Figures 1 to 3 This application provides a magnetic circuit structure 100. The magnetic circuit structure 100 is applied in a magnetic latching relay 10, and the closing or opening control of the magnetic latching relay 10 is realized through the magnetic circuit structure 100. Figure 1This is a schematic diagram of a magnetic circuit structure 100 according to an embodiment of this application. Figure 2 for Figure 1 The diagram shown illustrates the application of the magnetic circuit structure 100 to the magnetic latching relay 10. Figure 3 for Figure 2 An exploded view of the magnetic latching relay 10 shown.

[0063] To better illustrate the specific structure of the magnetic circuit structure 100, the structure of the magnetic latching relay 10 will be briefly introduced here. (See also...) Figures 1 to 3 The magnetic latching relay 10 includes at least a connection component 200, a contact component 300, and the magnetic circuit structure 100 of this application. The magnetic circuit structure 100 is the power source of the magnetic latching relay 10, and the output terminal of the magnetic circuit structure 100 is connected to the connection component 200, which can drive the connection component 200 to move along the height direction.

[0064] This application is based on Figures 1 to 3 The indicated height direction (vertical, top-bottom, axial) is used as a reference, and this height direction also applies to all components of the magnetic latching relay 10, which will not be described again later. The contact assembly 300 includes a moving contact 310 and a stationary contact 320. The stationary contact 320 and the moving contact 310 are arranged opposite each other along the height direction, and the stationary contact 320 is located above the moving contact 310. The moving contact 310 is disposed on the connecting assembly 200 and can move with the connecting assembly 200.

[0065] In this way, the magnetic circuit structure 100 can drive the connecting assembly 200 to move the moving contact 310 closer to or further away from the stationary contact 320 along the height direction, so that the moving contact 310 contacts or separates from the stationary contact 320, thereby closing or opening the magnetic latching relay 10. When the magnetic circuit structure 100 drives the connecting assembly 200 to move the moving contact 310 upward along the height direction, the moving contact 310 contacts the stationary contact 320, and the magnetic latching relay 10 closes to form a conductive path. When the magnetic circuit structure 100 drives the connecting assembly 200 to move the moving contact 310 downward along the height direction, the moving contact 310 separates from the stationary contact 320, and the magnetic latching relay 10 opens to form an open circuit.

[0066] In one embodiment, the magnetic latching relay 10 further includes a base plate 400 and a lead-out terminal 500. The stationary contact 320 is fixedly mounted on the base plate 400, and the lead-out terminal 500 is connected to the base plate 400 and electrically connected to the stationary contact 320. The lead-out terminal 500 can be connected to external wires to connect the magnetic latching relay 10 to a circuit.

[0067] It is worth noting that the focus of this application is on the magnetic circuit structure 100. Other structures and working principles of the magnetic latching relay 10 are not the focus of this application and will not be described further below. The following describes the specific structure of the magnetic circuit structure 100 in some embodiments.

[0068] The magnetic circuit structure 100 of this application can enhance the initial attraction force when the moving iron core 130 and the stationary iron core 120 are closed, which facilitates the engagement of the moving iron core 130 and the stationary iron core 120, thereby shortening the operating time of the magnetic latching relay 10. At the same time, it can also prevent the moving iron core 130 from tilting when the moving iron core 130 and the stationary iron core 120 are engaged, avoid wear between the moving iron core 130 and the coil frame 110, ensure the accuracy of the operation of the moving iron core 130, and improve the reliability of the magnetic latching relay 10.

[0069] See Figures 1 to 4 , Figure 6 In one embodiment, the magnetic circuit structure 100 includes a coil frame 110, a stationary iron core 120, and a moving iron core 130. The coil frame 110 has a mounting hole 111 extending through the coil in the height direction. The stationary iron core 120 is disposed in the coil frame 110 and located in the mounting hole 111, and has a mating protrusion 121. The moving iron core 130 is movably mounted through the mounting hole 111 and partially exposed in the coil frame 110. The moving iron core 130 and the stationary iron core 120 are disposed opposite each other in the height direction, and the side of the moving iron core 130 facing the stationary iron core 120 has a mating groove 131. The side of the mating groove 131 facing the stationary iron core 120 has a guide groove 1311, which guides the mating protrusion 121 to be installed in the mating groove 131. When the moving iron core 130 moves along the height direction, the mating groove 131 can cover or detach from the mating protrusion 121 so that the moving iron core 130 and the stationary iron core 120 can be attracted or separated. Figure 4 for Figure 1 The cross-sectional view of the magnetic circuit structure 100 shown. Figure 6 for Figure 4 A schematic diagram of the moving iron core 130 and the stationary iron core 120 in the magnetic circuit structure 100 shown.

[0070] The coil frame 110 serves as the framework for the magnetic circuit structure 100, supporting and mounting the moving iron core 130 and the stationary iron core 120. The coil frame 110 extends along its height and has mounting holes 111 that extend through it. The stationary iron core 120 is fixedly mounted in the mounting holes 111 of the coil frame 110, and the moving iron core 130 is partially mounted in the mounting holes 111 of the coil frame 110. The stationary iron core 120 and the moving iron core 130 are positioned opposite each other along their height, with the moving iron core 130 positioned above the stationary iron core 120.

[0071] The moving iron core 130 passes through and extends out of the mounting hole 111 of the coil frame 110. Thus, the moving iron core 130 is partially located within the mounting hole 111 of the coil frame 110 and partially located outside the coil frame 110. The end of the moving iron core 130 located outside the coil frame 110 is connected to the connecting assembly 200. Furthermore, the moving iron core 130 is movably mounted in the mounting hole 111, and can move along the height direction within the mounting hole 111 to move closer to or further away from the stationary iron core 120.

[0072] When the moving iron core 130 approaches the stationary iron core 120 along the height direction, the moving iron core 130 descends along the height direction in the mounting hole 111. When the moving iron core 130 contacts the stationary iron core 120, the moving iron core 130 and the stationary iron core 120 are attracted together. Moreover, when the moving iron core 130 descends, it can drive the connecting assembly 200 to separate the moving contact 310 from the stationary contact 320, thereby realizing the disconnection control of the magnetic latching relay 10.

[0073] As the moving iron core 130 moves away from the stationary iron core 120 along the height direction, the moving iron core 130 rises along the height direction in the mounting hole 111, and the moving iron core 130 and the stationary iron core 120 gradually move away from each other until they are completely separated. Moreover, when the moving iron core 130 rises, it can drive the connecting assembly 200 to make the moving contact 310 contact with the stationary contact 320, thereby realizing the closing control of the magnetic latching relay 10.

[0074] In its initial state, the moving iron core 130 of the magnetic latching relay 10 is separated from the stationary iron core 120, and the moving contact 310 and the stationary contact 320 are in a closed state. The initial position of the moving iron core 130 is that it is separated from the stationary iron core 120, meaning the magnetic latching relay 10 remains closed. When it is necessary to control the magnetic latching relay 10 to open, the moving iron core 130 moves towards the stationary iron core 120 under the magnetic force of the magnetic field, moving to the engaging position, causing the moving iron core 130 to engage with the stationary iron core 120, thereby controlling the moving contact 310 to open with the stationary contact 320, thus achieving the opening control of the magnetic latching relay 10.

[0075] In the past, the gap between the moving iron core 130 and the stationary iron core 120 was relatively large, resulting in significant magnetic leakage. The moving iron core 130 required a large initial attraction force to move from the initial position to the attraction position, which affected the attraction between the moving iron core 130 and the stationary iron core 120. Moreover, the moving iron core 130 would tilt during movement, which could easily cause wear on the coil frame 110.

[0076] Therefore, this application provides a mating protrusion 121 at the end of the stationary iron core 120 facing the moving iron core 130, and a mating groove 131 at the end of the moving iron core 130 facing the stationary iron core 120. That is, the mating protrusion 121 is provided above the stationary iron core 120, and the mating groove 131 is provided below the moving iron core 130, with the mating protrusion 121 and the mating groove 131 correspondingly provided. When the moving iron core 130 and the stationary iron core 120 are attracted or separated, the mating groove 131 can cover or detach from the mating protrusion 121.

[0077] When the moving iron core 130 is in its initial position, the mating groove 131 and the mating protrusion 121 separate. At this time, the mating protrusion 121 is close to the mating moving iron core 130 to reduce the magnetic gap when the moving iron core 130 and the stationary iron core 120 separate. In this way, after the moving iron core 130 is attracted by the magnetic field, the magnetic gap between the moving iron core 130 and the stationary iron core 120 is small, which can reduce the leakage magnetic field between the moving iron core 130 and the stationary iron core 120, thereby increasing the initial attraction when the moving iron core 130 and the stationary iron core 120 close, which facilitates the engagement of the moving iron core 130 and the stationary iron core 120, thereby shortening the operating time of the magnetic latching relay 10 and reducing the energy consumption of the magnetic latching relay 10.

[0078] When the moving iron core 130 moves closer to or further away from the stationary iron core 120 along the height direction, the mating groove 131 can move along the mating protrusion 121. The mating protrusion 121 and the mating groove 131 guide the movement of the moving iron core 130, so that the moving iron core 130 can move accurately in the mounting hole 111 along the height direction, avoiding the movement of the moving iron core 130 in the mounting hole 111 and minimizing the friction between the moving iron core 130 and the inner wall of the mounting hole 111. This also avoids wear between the moving iron core 130 and the coil frame 110, ensuring the accuracy of the movement of the moving iron core 130.

[0079] Furthermore, see Figure 4 and Figure 6 The guide groove 1311 is located at the bottom of the mating groove 131. When the moving iron core 130 descends along the height direction, the top of the mating protrusion 121 can first be inserted into the guide groove 1311 at the bottom of the mating groove 131. The guide groove 1311 can guide the mating protrusion 121, making it easier for the mating protrusion 121 to be inserted into the mating groove 131.

[0080] As the moving iron core 130 continues to descend, the guide groove 1311 guides the mating protrusion 121, allowing it to gradually move into the mating groove 131. This ensures the accurate engagement of the mating protrusion 121 and the mating groove 131, achieving precise attraction between the moving iron core 130 and the stationary iron core 120. In this embodiment, the guide groove 1311 is a flared groove to facilitate the movement of the mating protrusion 121 into the mating groove 131. Of course, in other embodiments of this application, the guide groove 1311 can also be any other structural form that facilitates the engagement of the mating protrusion 121 and the mating groove 131.

[0081] In the magnetic circuit structure 100 of the above embodiment, the moving iron core 130 and the stationary iron core 120 are engaged by a mating groove 131 and a mating protrusion 121. This reduces the magnetic gap when the moving iron core 130 and the stationary iron core 120 separate, thereby increasing the initial attraction when the moving iron core 130 and the stationary iron core 120 close, thus shortening the operating time of the magnetic latching relay 10. Simultaneously, as the moving iron core 130 moves closer to or further away from the stationary iron core 120 along the height direction, the mating groove 131 can move along the mating protrusion 121 to guide the movement of the moving iron core 130, preventing tilting of the moving iron core 130 within the mounting hole 111, thereby preventing wear between the moving iron core 130 and the coil frame 110, ensuring the accuracy of the moving iron core 130's operation, and improving the reliability of the magnetic latching relay 10.

[0082] See Figures 1 to 5 In one embodiment, the magnetic circuit structure 100 further includes a coil 140, which is wound and mounted on a coil frame 110. When the coil 140 is energized, it generates a magnetic field to drive the moving iron core 130 toward the stationary iron core 120, causing the moving iron core 130 and the stationary iron core 120 to attract each other. Figure 5 for Figure 4 The diagram shows a cross-sectional view of the magnetic circuit structure 100 at point AA. The coil 140 is a component of the magnetic circuit structure 100 that generates a magnetic field to control the movement of the moving iron core 130.

[0083] Coil 140 is wound on coil frame 110. When coil 140 is energized, it generates a magnetic field that produces an attractive force, controlling the moving iron core 130 to descend along the height direction, so that the moving iron core 130 and the stationary iron core 120 are attracted together. When a reverse voltage is applied to both ends of coil 140, it generates a reverse magnetic field to counteract the magnetic field of magnet 160. Under the elastic force of elastic element 150, the moving iron core 130 can rise along the height direction, so that the moving iron core 130 and the stationary iron core 120 are separated.

[0084] It is worth noting that the working principle of coil 140 and moving iron core 130 can be achieved using current technology, and will not be elaborated here.

[0085] See Figure 4 and Figure 6 In one embodiment, the mating groove 131 is a tapered hole, and the mating protrusion 121 is a frustum. That is, the inner wall of the mating groove 131 and the outer wall of the mating protrusion 121 have a certain taper. This facilitates demolding of the moving iron core 130 and the stationary iron core 120 during processing. At the same time, it also facilitates the attraction and separation between the mating protrusion 121 and the mating groove 131, thereby facilitating the attraction and separation of the moving iron core 130 and the stationary iron core 120.

[0086] See Figure 4 In one embodiment, the height dimension of the mating protrusion 121 is adapted to the depth of the mating groove 131 along the height direction. That is, the height dimension of the mating protrusion 121 is equal to the depth dimension of the mating groove 131. This increases the contact area of ​​the mating protrusion 121 and the mating groove 131, increases the magnetic flux density per unit area of ​​the contact area, and thus improves the holding force between the moving iron core 130 and the stationary iron core 120.

[0087] See Figure 4 In one embodiment, the mating protrusion 121 is located at the center of the mounting hole 111 along the height direction. That is, the mating protrusion 121 is located in the central region within the coil holder 110. This reduces the attractive force of the stationary iron core 120 on the product, improving reliability.

[0088] See Figure 4 and Figure 6 In one embodiment, the moving iron core 130 includes a first iron core body 132 and a second iron core body 133 connected along the height direction. The mounting hole 111 includes a first main body hole 1111 and a second main body hole 1112 that are connected along the axial direction. The stationary iron core 120 is at least partially located in the first main body hole 1111. The second iron core body 133 is located in the first main body hole 1111. The first iron core body 132 extends through the second main body hole 1112 and a mating groove 131 is provided in the second iron core body 133.

[0089] The first iron core body 132 and the second iron core body 133 are the main structures of the moving iron core 130. The first iron core body 132 and the second iron core body 133 are arranged and connected in sequence along the height direction (the axial direction and movement direction of the moving iron core 130, which will not be described in detail later). The first iron core body 132 is set on the second iron core body 133. The second iron core body 133 is located in the mounting hole 111. The first iron core body 132 extends through the mounting hole 111 to be connected to the connecting assembly 200.

[0090] In this way, the second iron core body 133 can rise or fall in the mounting hole 111, so that the second iron core body 133 can separate or engage with the stationary iron core 120, thereby controlling the connecting assembly 200 to drive the moving contact 310 to contact or separate from the stationary contact 320, realizing the closing or opening control of the magnetic latching relay 10. Moreover, a matching groove 131 is provided at the bottom of the second iron core body 133.

[0091] Optionally, the first core body 132 and the second core body 133 are an integral structure. This ensures the structural strength of the moving core 130, simplifies the assembly process, and improves the reliability of the moving core 130. Of course, in other embodiments of this application, the first core body 132 and the second core body 133 can also be provided separately.

[0092] The mounting hole 111 is divided into a first main body hole 1111 and a second main body hole 1112 along the axial direction. The first main body hole 1111 is located in the middle region of the mounting hole 111, and the second main body hole 1112 is located above the first main body hole 1111 and communicates with the first main body hole 1111. The stationary iron core 120 is partially installed in the first main body hole 1111, and the second iron core body 133 is movably installed in the first main body hole 1111. The first iron core body 132 extends out of the coil frame 110 through the second main body hole 1112.

[0093] Thus, through the design of the first iron core body 132 and the second iron core body 133, the moving iron core 130 can be easily installed in the first main body hole 1111 and can be attracted or separated from the stationary iron core 120 in the first main body hole 1111. Moreover, after the first iron core body 132 extends through the second main body hole 1112, it can also facilitate the moving iron core 130 to cooperate with the connecting component 200, thereby driving the moving contact 310 to move.

[0094] See Figure 4 and Figure 6 In one embodiment, the outer diameter of the second core body 133 is larger than the outer diameter of the first core body 132, forming a first limiting step 134. The inner diameter of the first main body hole 1111 is larger than the inner diameter of the second main body hole 1112, forming a second limiting step 1114. The second limiting step 1114 can abut against the first limiting step 134 to limit the moving core 130 when it separates from the stationary core 120.

[0095] The outer surface of the second core body 133 protrudes radially beyond the outer surface of the first core body 132, such that the outer diameter of the second core body 133 is larger than the outer diameter of the first core body 132. This creates a stepped connection between the first core body 132 and the second core body 133, forming a first limiting step 134. The inner diameter of the first main body hole 1111 is larger than the inner diameter of the second main body hole 1112. Therefore, the connection between the first main body hole 1111 and the second main body hole 1112 is also stepped, forming a second limiting step 1114.

[0096] After the moving iron core 130 is installed in the mounting hole 111, the first limiting step 134 abuts against the second limiting step 1114. At this time, the second limiting step 1114 can limit the first limiting step 134, thereby limiting the position of the moving iron core 130 in the height direction. This allows the moving iron core 130 to be in its initial position after separating from the stationary iron core 120, preventing the moving iron core 130 from rising excessively. While ensuring the separation of the moving iron core 130 from the stationary iron core 120, the magnetic gap between the moving iron core 130 and the stationary iron core 120 is reduced, thereby increasing the initial attraction between the moving iron core 130 and the stationary iron core 120.

[0097] Thus, after the moving iron core 130 is installed into the mounting hole 111 of the coil frame 110, the moving iron core 130 can be limited by the structure of the coil frame 110 itself to restrict the position of the moving iron core 130 in the height direction. There is no need to add external slots, snap rings or other structures for limiting, which makes the cooperation structure between the moving iron core 130 and the coil frame 110 simpler and reduces the structural complexity of the magnetic circuit structure 100. At the same time, there is no need to add snap rings to limit the movement at the end of the moving iron core 130, which reduces the height dimension of the magnetic circuit structure 100.

[0098] See Figure 4 and Figure 6 In one embodiment, the height of the second core body 133 along the height direction is 1 / 4 to 1 / 2 of the height of the moving core 130. That is, the second core body 133 has a certain height dimension along the height direction. In this way, when the moving core 130 moves along the height direction, the second core body 133 guides and engages with the inner wall of the mounting hole 111, ensuring that the moving core 130 does not tilt or tilts at a small angle during its movement, preventing the moving core 130 from shaking, ensuring that the moving core 130 will not scratch the inner wall of the mounting hole 111 throughout its entire lifespan, and minimizing wear between the moving core 130 and the coil frame 110.

[0099] See Figures 4 to 6In one embodiment, a preset gap exists between the outer surface of the second core body 133 and the inner wall of the mounting hole 111. That is, there is a small gap between the outer surface of the second core body 133 and the inner wall of the mounting hole 111. This small gap ensures that the moving core 130 will not tilt during movement, and that the moving core 130 will not scratch the inner wall of the mounting hole 111 throughout its entire lifespan, thereby reducing the likelihood of jamming during the movement of the moving core 130.

[0100] Optionally, the preset gap can be in the range of 0.05mm to 0.15mm. This ensures a small gap between the second core body 133 and the inner wall of the mounting hole 111, preventing the moving core 130 from tilting during movement and ensuring that the moving core 130 will not scratch the inner wall of the mounting hole 111 throughout its lifespan. For example, the preset gap can be 0.1mm or another size.

[0101] In one embodiment, the inner wall of the mounting hole 111 is smoothly provided. This application has a roughness requirement for the inner wall of the mounting hole 111 of the coil frame 110. When the moving iron core 130 rises or falls in the mounting hole 111, the smooth inner wall of the mounting hole 111 can guide the moving iron core 130 to ensure smooth movement of the moving iron core 130.

[0102] See Figure 4 and Figure 6 In one embodiment, the magnetic circuit structure 100 includes an elastic element 150, which is sleeved on the stationary iron core 120 and located in the mounting hole 111. The elastic element 150 can also abut against the moving iron core 130, and the elastic force of the elastic element 150 can separate the moving iron core 130 from the stationary iron core 120. The elastic element 150 is installed between the moving iron core 130 and the stationary iron core 120, and the movement stroke of the moving iron core 130 is controllable through the elastic element 150. Optionally, the elastic element 150 is a spring.

[0103] The elastic element 150 is located in the mounting hole 111 and is fitted onto the stationary iron core 120. Under the attraction of the magnetic field, the moving iron core 130 can overcome the elastic force of the elastic element 150, and the moving iron core 130 can compress the elastic element 150 and move towards the stationary iron core 120, thus attracting the moving iron core 130 to the stationary iron core 120. When the magnetic field disappears, the elastic force of the elastic element 150 can push the moving iron core 130 upward in the mounting hole 111, so that the moving iron core 130 can return to its initial position and separate from the stationary iron core 120.

[0104] Thus, this application provides an elastic element 150 in the mounting hole 111 of the coil frame 110, and the elastic element 150 is located between the moving iron core 130 and the stationary iron core 120. When the moving iron core 130 and the stationary iron core 120 are attracted together, the moving iron core 130 can compress the elastic element 150. When the moving iron core 130 and the stationary iron core 120 are separated, the elastic element 150 can push the moving iron core 130 to reset, so that the movement stroke of the moving iron core 130 can be controlled, and the height of the entire magnetic circuit structure 100 is reduced, so that the moving iron core 130 can accurately separate from the stationary iron core 120 when it returns to its initial position.

[0105] See Figure 4 and Figure 6 In one embodiment, the moving iron core 130 further includes a third iron core body 135, which is disposed on the side of the second iron core body 133 opposite to the first iron core body 132. The outer diameter of the third iron core body 135 is smaller than the outer diameter of the second iron core body 133, and the elastic member 150 can be at least partially sleeved on the third iron core body 135 when the moving iron core 130 and the stationary iron core 120 are attracted together.

[0106] The third core body 135 is disposed below the second core body 133, that is, the first core body 132, the second core body 133, and the third core body 135 are arranged and connected sequentially along the height direction. The outer surface of the third core body 135 is radially recessed into the second core body 133, so that the outer diameter of the third core body 135 is smaller than the outer diameter of the second core body 133.

[0107] As the moving iron core 130 moves toward the stationary iron core 120, the elastic element 150 can partially fit onto the third iron core body 135. As the moving iron core 130 continues to descend, the end face of the second iron core body 133 can compress the elastic element 150, causing the mating groove 131 to gradually cover the mating protrusion 121. During this process, the third iron core body 135 can guide the elastic element 150, preventing it from bending and ensuring that the moving iron core 130 can accurately descend into the mounting hole 111.

[0108] In one embodiment, the third core body 135 is integrally formed with the first core body 132 and the second core body 133. This ensures the structural strength of the moving core 130, simplifies the assembly process, and improves the reliability of the moving core 130. Of course, in other embodiments of this application, the third core body 135 may also be separately formed with the first core body 132 and the second core body 133.

[0109] See Figure 4 and Figure 6In one embodiment, the stationary iron core 120 further includes a mounting base 122 and a first mounting protrusion 123. The mounting hole 111 also has a third main body hole 1113, which is located at one end of the first main body hole 1111 away from the second main body hole 1112 and communicates with the first main body hole 1111. The mounting base 122 is located in the third main body hole 1113, the first mounting protrusion 123 is disposed on the mounting base 122 and located in the first main body hole 1111, the elastic member 150 is at least partially sleeved on the first mounting protrusion 123, and the moving iron core 130 can abut against the first mounting protrusion 123 when it is attracted to the stationary iron core 120.

[0110] The mounting base 122 is the mounting seat for the stationary iron core 120. The mounting base 122 is fixedly mounted on the coil frame 110. The bottom of the mounting hole 111 is a third main body hole 1113, which is located below and connected to the first main body hole 1111. The mounting base 122 is fixedly installed into the main body hole. The first mounting protrusion 123 is provided on the mounting base 122 and is located in the first main body hole 1111.

[0111] The mating protrusion 121 is disposed on the first mounting protrusion 123. The outer surface of the first mounting protrusion 123 protrudes radially from the mating protrusion 121, so that the outer diameter of the first mounting protrusion 123 is larger than the outer diameter of the mating protrusion 121. The elastic element 150 is sleeved on the outer surface of the first mounting protrusion 123.

[0112] Thus, there is a certain gap between the elastic element 150 and the outer surface of the mating protrusion 121. When the moving iron core 130 and the stationary iron core 120 are attracted together, the third iron core body 135 can be sleeved on the outside of the mating protrusion 121 and can be inserted into the elastic element 150, so that the second iron core body 133 compresses the elastic element 150.

[0113] See Figure 3 , Figure 4 and Figure 6 In one embodiment, the magnetic circuit structure 100 further includes a magnet 160, which is disposed in the third main body hole 1113 and located on the side of the stationary iron core 120 opposite to the moving iron core 130. The magnet 160 is mounted on the inner wall of the coil frame 110 and located at the bottom of the stationary iron core 120. The magnet 160 can generate an attractive force to provide an initial attractive force for the moving iron core 130, thereby increasing the initial attractive force of the magnetic latching relay 10, reducing the energy consumption when the moving iron core 130 and the stationary iron core 120 are engaged, facilitating the engagement of the moving iron core 130 and the stationary iron core 120, and shortening the operating time and release time of the magnetic latching relay 10.

[0114] See Figure 3 , Figure 4 and Figure 6In one embodiment, the inner diameter of the third main hole 1113 is larger than the inner diameter of the first main hole 1111, forming a third limiting step, and the mounting base 122 abuts against the third limiting step. The third main hole 1113 is located below the first main hole 1111 and forms a stepped hole with the first main hole 1111, and the top wall of the third main hole 1113 forms the third limiting step. After the mounting base 122 of the stationary iron core 120 is installed in the third main hole 1113, the mounting base 122 can abut against the third limiting step to limit the stationary iron core 120, so that the stationary iron core 120 is reliably located in the coil frame 110, and the stationary iron core 120 is prevented from moving upward.

[0115] See Figures 1 to 4 In one embodiment, the magnetic circuit structure 100 further includes a yoke 170 and a mounting plate 180. The mounting plate 180 is disposed on the yoke 170 and forms an installation space with the yoke 170. The coil frame 110 is disposed in the installation space and abuts against the yoke 170 and the mounting plate 180 in the height direction. The moving iron core 130 passes through the mounting plate 180 to extend out of the installation space.

[0116] The yoke 170 is U-shaped, and the coil frame 110 is disposed within the yoke 170. A mounting plate 180 is disposed at the U-shaped opening of the yoke 170, providing support for the components above the magnetic circuit structure 100. After the coil frame 110 is installed in the mounting space, its bottom abuts against the yoke 170, and its top abuts against the mounting plate 180, reliably fixing the coil frame 110 between the yoke 170 and the mounting plate 180, thus securing the coil frame 110 and preventing it from shifting.

[0117] After the coil 140 is energized, the yoke 170, mounting plate 180, moving iron core 130, stationary iron core 120 and magnet 160 can form a low magnetic resistance channel, allowing the magnetic flux to start from the moving iron core 130, pass through the yoke 170, then through the working air gap, and finally return to the moving iron core 130, forming a complete magnetic circuit, so that the moving iron core 130 can be attracted to the stationary iron core 120 under the attraction of the magnetic field.

[0118] See Figure 4 In one embodiment, the sum of the height dimensions of the mounting base 122 and the magnet 160 is greater than the depth of the third main body hole 113, so that the magnet 160 abuts against the yoke 170. After the mounting base 122 and the magnet 160 are installed into the third main body hole 1113, the bottom of the magnet 160 will protrude from the coil frame 110 to abut against the yoke 170. In this way, the magnet 160 and the stationary iron core 120 can be reliably fixed in the coil frame 110, preventing the magnet 160 and the stationary iron core 120 from shifting.

[0119] See Figure 4 and Figure 6 In one embodiment, the stationary iron core 120 further includes a second mounting protrusion 124, which is disposed between the first mounting protrusion 123 and the mounting base 122. The outer diameter of the second mounting protrusion 124 is larger than the outer diameter of the first mounting protrusion 123, and is used to support the elastic member 150.

[0120] The second mounting protrusion 124 is disposed between the first mounting protrusion 123 and the mounting base 122. The outer surface of the second mounting protrusion 124 protrudes radially beyond the outer surface of the first mounting protrusion 123, so that the outer diameter of the second mounting protrusion 124 is larger than the outer diameter of the first mounting protrusion 123.

[0121] After the elastic element 150 is fitted onto the first mounting protrusion 123, the bottom of the elastic element 150 can abut against the top surface of the second mounting protrusion 124, which provides support for the elastic element 150. Thus, when the moving iron core 130 compresses the elastic element 150, the elastic element 150 can support the second mounting protrusion 124. When the moving iron core 130 separates from the stationary iron core 120, the support of the second mounting protrusion 124 on the elastic element 150 can push the moving iron core 130 back to its initial position.

[0122] In one embodiment, the mounting base 122, the second mounting protrusion 124, the first mounting protrusion 123, and the mating protrusion 121 are integrated into one structure. This ensures the structural strength of the stationary iron core 120, simplifies the assembly process, and improves the reliability of the stationary iron core 120. Of course, in other embodiments of this application, the mounting base 122, the second mounting protrusion 124, the first mounting protrusion 123, and the mating protrusion 121 can also be provided separately.

[0123] In the magnetic circuit structure 100 of this application, the moving iron core 130 and the stationary iron core 120 are engaged by the mating groove 131 and the mating protrusion 121. This reduces the magnetic gap when the moving iron core 130 and the stationary iron core 120 are separated, thereby increasing the initial attraction when the moving iron core 130 and the stationary iron core 120 are closed, so as to shorten the operating time of the magnetic latching relay 10.

[0124] Meanwhile, when the moving iron core 130 approaches or moves away from the stationary iron core 120 along the height direction, the mating groove 131 can move along the mating protrusion 121 to guide the movement of the moving iron core 130, prevent the moving iron core 130 from tilting in the mounting hole 111, thereby preventing wear between the moving iron core 130 and the coil frame 110, ensuring the accuracy of the movement of the moving iron core 130, and improving the reliability of the magnetic latching relay 10.

[0125] Furthermore, the moving iron core 130, the elastic element 150, the stationary iron core 120, and the magnet 160 are mounted on the inner wall of the coil frame 110. The moving iron core 130 is limited by the coil frame 110 to simplify the limiting structure of the moving iron core 130, so that the moving iron core 130 can be reliably placed in the initial position and the height of the magnetic circuit structure 100 is reduced, thereby reducing the overall volume of the magnetic latching relay 10.

[0126] See Figures 1 to 3 This application also provides a magnetic latching relay 10, including a connection assembly 200, a contact assembly 300, and a magnetic circuit structure 100 as described in any of the above embodiments. The connection assembly 200 is disposed at one end of the moving iron core 130 extending out of the coil frame 110 in the magnetic circuit structure 100. The contact assembly 300 includes a moving contact 310 and a stationary contact 320. The moving contact 310 is disposed in the connection assembly 200, and the stationary contact 320 and the moving contact 310 are arranged opposite each other along the height direction. The moving iron core 130 can drive the connection assembly 200 and the moving contact 310 to move along the height direction, so that the moving contact 310 contacts or separates from the stationary contact 320.

[0127] It is worth noting that the specific connection method between the connecting component 200 and the moving iron core 130 is not limited here. After adopting the magnetic circuit structure 100 of the above embodiment, the magnetic latching relay 10 of this application can increase the initial attraction force of the moving iron core 130 and the stationary iron core 120, thereby increasing the initial attraction force of the magnetic latching relay 10, reducing the energy consumption of the magnetic latching relay 10, shortening the operating time and release time of the magnetic latching relay 10, and also preventing the moving iron core 130 from tilting during movement, ensuring the accuracy of the moving iron core 130's operation, and improving the reliability of the magnetic latching relay 10.

[0128] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A magnetic circuit structure, characterized in that, Applied in magnetic latching relays, the magnetic circuit structure includes: A coil holder having a mounting hole extending through the height direction; A stationary iron core is disposed on the coil frame and located in the mounting hole, and the stationary iron core has a mating protrusion; The moving iron core is movably installed through the mounting hole and partially exposed in the coil frame. The moving iron core and the stationary iron core are arranged opposite each other along the height direction. The moving iron core has a mating groove on the side facing the stationary iron core, and the mating groove has a guide groove on the side facing the stationary iron core. The guide groove can guide the mating protrusion to be installed in the mating groove. When the moving iron core moves along the height direction, the mating groove can cover or detach from the mating protrusion, so that the moving iron core can be attracted to or separated from the stationary iron core.

2. The magnetic circuit structure according to claim 1, characterized in that, The dimensions of the mating protrusion along the height direction are adapted to the depth of the mating groove along the height direction; And / or, the mating protrusion is located at the center of the mounting hole along the height direction.

3. The magnetic circuit structure according to claim 1, characterized in that, The moving iron core includes a first iron core body and a second iron core body connected along the height direction; The mounting hole includes a first main body hole and a second main body hole that are connected along the axial direction. The stationary iron core is at least partially located in the first main body hole, and the second iron core body is located in the first main body hole. The first iron core body extends out through the second main body hole. The mating groove is provided in the second iron core body.

4. The magnetic circuit structure according to claim 3, characterized in that The outer diameter of the second iron core body is larger than the outer diameter of the first iron core body, forming a first limiting step; The inner diameter of the first main body hole is larger than the inner diameter of the second main body hole to form a second limiting step. The second limiting step can abut against the first limiting step to limit the movement of the moving iron core when it is separated from the stationary iron core.

5. The magnetic circuit structure according to claim 3, characterized in that, The height of the second iron core body along the height direction is 1 / 4 to 1 / 2 of the height of the moving iron core; And / or, there is a preset gap between the outer surface of the second core body and the inner wall of the mounting hole.

6. The magnetic circuit structure according to any one of claims 3 to 5, characterized in that, The magnetic circuit structure includes an elastic element, which is sleeved on the stationary iron core and located in the mounting hole. The elastic element can also abut against the moving iron core. The elastic force of the elastic element enables the moving iron core to separate from the stationary iron core.

7. The magnetic circuit structure of claim 6, wherein The moving iron core also includes a third iron core body, which is disposed on the side of the second iron core body away from the first iron core body; The outer diameter of the third iron core body is smaller than the outer diameter of the second iron core body, and the elastic element can be at least partially sleeved on the third iron core body when the moving iron core and the stationary iron core are attracted together.

8. The magnetic circuit structure of claim 6, wherein The stationary iron core also includes a mounting base and a first mounting protrusion. The mounting hole also has a third main body hole, which is located at the end of the first main body hole away from the second main body hole and communicates with the first main body hole. The mounting base is located in the third main body hole, the first mounting protrusion is disposed on the mounting base and located in the first main body hole, the elastic element is at least partially sleeved on the first mounting protrusion, and the moving iron core can abut against the first mounting protrusion when it is attracted to the stationary iron core.

9. The magnetic circuit structure according to claim 8, characterized in that, The inner diameter of the third main hole is larger than the inner diameter of the first main hole to form a third limiting step, and the mounting base abuts against the third limiting step.

10. The magnetic circuit structure of claim 8, wherein The magnetic circuit structure also includes a magnet, which is disposed in the third main hole and located on the side of the stationary iron core away from the moving iron core.

11. The magnetic circuit structure of claim 10, wherein The magnetic circuit structure also includes a yoke and a mounting plate. The mounting plate is disposed on the yoke and together with the yoke, they form an installation space. The coil frame is disposed in the installation space and abuts against the yoke and the mounting plate in the height direction. The moving iron core passes through the mounting plate and extends out of the installation space.

12. The magnetic circuit structure of claim 11, wherein, The sum of the height dimension of the mounting base and the height dimension of the magnet is greater than the depth of the third main hole, so that the magnet abuts against the yoke.

13. The magnetic circuit structure of claim 8, wherein, The stationary iron core also includes a second mounting protrusion, which is disposed between the first mounting protrusion and the mounting base. The outer diameter of the second mounting protrusion is larger than the outer diameter of the first mounting protrusion, and is used to support the elastic element.

14. A magnetic latching relay, characterized by Includes a connection component, a contact component, and a magnetic circuit structure as described in any one of claims 1 to 13; The connecting component is disposed at one end of the moving iron core extending out of the coil frame in the magnetic circuit structure. The contact component includes a moving contact and a stationary contact. The moving contact is disposed in the connecting component. The stationary contact and the moving contact are arranged opposite to each other along the height direction. The moving iron core can drive the connecting component and the moving contact to move along the height direction, so that the moving contact can contact or separate from the stationary contact.

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