Magnetic latching relay

Abstract

The present application relates to a magnetic latching relay (10), comprising a main contact assembly (13), an armature assembly (14) and an auxiliary contact assembly (15). The main contact assembly (13) comprises a main movable spring portion (131) and a main static spring portion (132). The armature assembly (14) comprises a housing (141) and a permanent magnet (142), and the armature assembly (14) can rotate relative to the main contact assembly (13) so that a main movable contact (1311) is in contact with or separated from a main static contact (1321). The auxiliary contact assembly (15) comprises an auxiliary movable spring portion (151) and an auxiliary static spring portion (152). The auxiliary movable spring portion (151) is arranged on the armature assembly (14) and, as the armature assembly (14) rotates, can move in a direction close to or away from the auxiliary static spring portion (152), such that an auxiliary movable contact (1515) is in contact with or separated from an auxiliary static contact.

Description

Magnetic latching relay

[0001] Related applications

[0002] This application claims priority to Chinese patent applications filed on December 20, 2024, with application number 2024231671270 entitled "Magnetic Holding Relay" and application number 2024118962014 entitled "Magnetic Holding Relay and Assembly Method Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of relay technology, and in particular to a magnetic latching relay. Background Technology

[0004] Magnetic latching relays automatically connect and disconnect circuits. The normally closed or normally open state of a magnetic latching relay depends on the action of a permanent magnet. The switching state of the magnetic latching relay is triggered by a pulse electrical signal of a certain width. The open or closed state of the contacts of the magnetic latching relay is maintained by the magnetic force generated by the permanent magnet. When the relay contacts need to be in an open or closed state, only a positive (or negative) DC pulse voltage needs to be used to excite the coil.

[0005] With the continuous expansion of relay applications, magnetic latching relays with auxiliary contact structures have emerged. The main function of the auxiliary contacts is to provide feedback on the contact status of the main contacts. However, in traditional magnetic latching relays, the microswitches in the auxiliary contact structure are prone to deformation, leading to malfunctions and poor reliability. Summary of the Invention

[0006] According to various embodiments of this application, a magnetic latching relay is provided.

[0007] A magnetic latching relay includes a main contact assembly, an armature assembly, and an auxiliary contact assembly. The main contact assembly includes a driving spring portion with a driving contact and a stationary spring portion with a stationary main contact. The armature assembly includes a housing and a permanent magnet disposed in the housing. The armature assembly is rotatable relative to the main contact assembly, causing a portion of the driving spring portion to move closer to or away from the stationary main contact, thereby causing the driving contact and the stationary main contact to contact or separate. The auxiliary contact assembly includes an auxiliary moving spring portion with an auxiliary moving contact and an auxiliary stationary spring portion with an auxiliary stationary contact. The auxiliary moving spring portion is disposed on the armature assembly and is rotatable with the armature assembly, moving closer to or away from the auxiliary stationary spring portion, thereby causing the auxiliary moving contact and the auxiliary stationary contact to contact or separate.

[0008] The aforementioned magnetic latching relay has an auxiliary moving spring portion mounted on the armature assembly. This allows the auxiliary moving spring portion to move closer to or further away from the auxiliary stationary spring portion as the armature assembly rotates relative to the main contact assembly. This enables the auxiliary moving contact and the auxiliary stationary contact to contact or separate. Consequently, forced conduction or forced disconnection of the auxiliary moving spring portion and the auxiliary stationary spring portion can be achieved. The auxiliary contact assembly is less likely to fail to switch on and off properly due to deformation of the auxiliary moving spring portion, thus improving the structural reliability of the auxiliary contact assembly.

[0009] In one embodiment, the magnetic latching relay further includes a base, the main contact assembly is disposed on the base, the armature assembly is rotatably disposed on the base, and the auxiliary stationary spring is a rigid structure, which passes through and is fixed to the base. Compared with the traditional flexible auxiliary stationary spring, the rigid auxiliary stationary spring can prevent deformation and retraction of the auxiliary stationary spring, which would reduce the overtravel of the push card, thereby avoiding the problem of reduced contact reliability or even contact failure between the auxiliary moving spring and the auxiliary stationary spring.

[0010] In one embodiment, the auxiliary stationary spring portion is a columnar structure that passes through the base. Using a rigid columnar structure as the auxiliary stationary spring portion simplifies the component structure of the auxiliary contact assembly, simplifies the molding process of the auxiliary stationary spring portion, and makes the assembly of the auxiliary stationary spring portion on the base easier. The columnar auxiliary stationary spring portion contacts the auxiliary moving spring portion from its side, which helps improve the contact accuracy and reliability between the auxiliary moving spring portion and the auxiliary stationary spring portion, preventing misalignment of the auxiliary stationary spring portion from affecting the contact state of the monitoring main contact assembly.

[0011] In one embodiment, the auxiliary contact assembly includes two spaced-apart auxiliary stationary spring portions. Each auxiliary moving spring portion includes a body portion and at least two contact portions. The body portion is connected to the housing, and the at least two contact portions are connected to opposite edges of the body portion. Each contact portion has an auxiliary moving contact. The auxiliary moving spring portion can move with the armature assembly until the two auxiliary moving contacts correspond one-to-one with the two auxiliary stationary spring portions. The two contact portions can move synchronously with the rotation of the armature assembly to achieve contact or separation with the auxiliary stationary spring portions, which simplifies the structure of the auxiliary moving spring portion and improves the performance stability of the magnetic latching relay.

[0012] In one embodiment, each of the two opposing edges of the auxiliary moving spring portion is connected to at least two spaced-apart contact portions. When the auxiliary moving spring portion and the auxiliary stationary spring portion are in contact, the auxiliary moving contacts connected to at least two of the contact portions on one edge of the body portion can contact different parts of the auxiliary stationary spring portion in the axial direction. This multi-point contact method can improve the contact reliability of the auxiliary contact assembly.

[0013] In one embodiment, at least a portion of the contact portion located between the auxiliary moving contact and the main body is arc-shaped. This increases the deformation space of the contact portion, thereby reducing the risk of the contact portion deforming irrecoverably due to compression with the auxiliary stationary spring portion, thus improving the structural reliability of the auxiliary contact assembly. Furthermore, the arc shape increases the flexibility of the contact portion and helps reduce the stress generated in the auxiliary moving spring portion during deformation, thereby reducing the risk of contact portion breakage.

[0014] In one embodiment, the body portion has a through hole, and the armature assembly further includes a protrusion structure disposed on the housing and located within the through hole, the housing being fixedly connected to the body portion through the protrusion structure.

[0015] In one embodiment, the armature assembly further includes a mating structure disposed on the housing, wherein a fastening groove is formed between the mating structure and the housing, and a portion of the body portion is embedded in and detachably fixed within the fastening groove.

[0016] In one embodiment, the main body has a through hole, and the armature assembly further includes a limiting structure. The limiting structure includes a connecting part and a limiting part. The connecting part is connected to the housing, and the limiting part is connected to the end of the connecting part away from the housing. The auxiliary moving spring has a first state and a second state. In the first state, the connecting part is located inside the through hole, and the limiting part is located on the side of the main body facing away from the housing and opposite to the through hole. The auxiliary moving spring can rotate around the connecting part to switch from the first state to the second state. In the second state, the limiting part abuts against the side of the main body facing away from the housing. This configuration simplifies the assembly process of the auxiliary moving spring, reduces assembly difficulty and manufacturing costs, and also improves the convenience of replacing or maintaining the auxiliary moving spring.

[0017] In one embodiment, the body portion is provided with a positioning hole, and the armature assembly further includes a positioning protrusion provided on the housing. In the second state, the positioning protrusion is at least partially embedded in the positioning hole. The positioning protrusion and positioning hole working together improve the positioning accuracy of the auxiliary moving spring portion in the second state. Simultaneously, the limiting portion helps to limit the auxiliary moving spring portion and prevents it from swaying in the second state, thus improving the performance reliability of the magnetic latching relay.

[0018] In one embodiment, the auxiliary moving spring portion further includes an isolation portion disposed on the side of the main body facing away from the housing. In the second state, the isolation portion abuts against the side of the limiting portion facing the housing. The isolation portion abuts against the limiting portion 1432 to prevent the limiting portion from directly rubbing against the pupil edge of the main body during rotation of the auxiliary moving spring portion 151, thereby reducing the risk of scraping of the auxiliary moving spring portion. It also helps to prevent the auxiliary moving spring portion from shaking by tightly fitting the height of the isolation portion with the limiting portion.

[0019] In one embodiment, the two opposite edges of the body portion are bent away from the housing to form a ramp or arcuate surface for the positioning protrusion to slide into the space between the housing and the body portion. The positioning protrusion can slide into the space between the body portion and the housing along the ramp or arcuate surface formed by the flange without directly scraping against the side of the body portion, which helps to reduce the risk of scratches on the body portion caused by the positioning protrusion.

[0020] In one embodiment, the portions of the auxiliary moving spring corresponding to the two opposite edges of the main body are bent away from the housing and stacked on the side of the main body facing away from the housing to form the isolation portion. By folding the auxiliary moving spring portion, both the flange and the isolation portion can be formed simultaneously, which simplifies the manufacturing process of the auxiliary moving spring portion and reduces manufacturing costs.

[0021] In one embodiment, the auxiliary moving contact is formed by the contact portion protruding towards the auxiliary stationary spring portion, and the auxiliary moving contact, the contact portion, and the body portion are an integral structure. This configuration simplifies the component composition of the auxiliary moving spring portion, reduces the riveting process of the contact point, and improves the stability of the auxiliary moving contact on the auxiliary moving spring portion.

[0022] In one embodiment, the magnetic latching relay further includes a linkage connected to the active spring portion. The housing has a mating end away from the auxiliary active spring portion. When the armature assembly rotates relative to the main contact assembly to move the mating end away from the active spring portion, the mating end can drive a portion of the active spring portion away from the main stationary spring portion via the linkage until the active contact and the main stationary contact separate.

[0023] The auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion that faces away from the active spring portion; or,

[0024] The auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion facing the active spring portion.

[0025] Details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects, and advantages of the invention will become apparent from the specification, drawings, and claims. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0027] Figure 1 is a schematic diagram of the structure of a magnetic latching relay in some embodiments.

[0028] Figure 2 is a structural schematic diagram of the magnetic latching relay from another angle in some embodiments.

[0029] Figure 3 is a cross-sectional view of the magnetic latching relay shown in Figure 2 along the AA direction.

[0030] Figure 4 is a schematic diagram of the base structure in some embodiments.

[0031] Figure 5 is a schematic diagram of the structure of the magnetic latching relay without a base in some embodiments.

[0032] Figure 6 is a schematic diagram of the structure in which the auxiliary moving spring part and the auxiliary stationary spring part are in contact in some embodiments.

[0033] Figure 7 is a schematic diagram of the structure in some embodiments where the auxiliary moving spring part and the auxiliary stationary spring part are separated.

[0034] Figure 8 is a schematic diagram of the structure of the magnetic latching relay with the base omitted when the auxiliary moving spring part and the auxiliary stationary spring part are separated in some embodiments.

[0035] Figure 9 is a schematic diagram of the structure of the magnetic latching relay with the base omitted when the auxiliary moving spring and the auxiliary stationary spring are in contact in some embodiments.

[0036] Figure 10 is a schematic diagram of the structure in which the auxiliary moving spring part contacts the two auxiliary stationary spring parts in some embodiments.

[0037] Figure 11 is a schematic diagram of the armature assembly in some embodiments.

[0038] Figure 12 is a schematic diagram of the auxiliary moving spring part in some embodiments.

[0039] Figure 13 is a schematic diagram of the structure when the auxiliary moving spring is in the first state in some embodiments.

[0040] Figure 14 is a schematic diagram of the auxiliary moving spring section switching between the first state and the second state in some embodiments.

[0041] Figure 15 is a schematic diagram of the structure when the auxiliary moving spring is in the second state in some embodiments.

[0042] Figure 16 is a schematic diagram of the connection between the auxiliary moving spring and the housing in some other embodiments.

[0043] Figure 17 is a structural schematic diagram of the armature assembly in some other embodiments.

[0044] Figure 18 is a structural schematic diagram of the auxiliary moving spring part in some other embodiments. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] First Embodiment

[0052] Please refer to Figures 1-5. Figures 1 and 2 are schematic diagrams of the magnetic latching relay 10 at different angles in some embodiments. Figure 3 is a cross-sectional view of the magnetic latching relay 10 shown in Figure 2 along the AA direction. Figure 4 is a schematic diagram of the base 11 in some embodiments. Figure 5 is a schematic diagram of the magnetic latching relay 10 in some embodiments where the base 11 is omitted. The magnetic latching relay 10 provided in this application includes, but is not limited to, applications in scenarios such as charging pile power module control. The magnetic latching relay 10 can maintain the open or closed state of the contacts by means of the magnetic field force of permanent magnets 142, and can complete the switching between open and closed states under the excitation of positive (reverse) DC pulse voltage.

[0053] In some embodiments, the magnetic latching relay 10 includes a base 11, an electromagnetic assembly 12, a main contact assembly 13, an armature assembly 14, and an auxiliary contact assembly 15, all of which are disposed on the base 11. The electromagnetic assembly 12 includes a coil 121 and an iron core 122 disposed within the coil 121. The main contact assembly 13 includes an active spring portion 131 and a stationary spring portion 132. The active spring portion 131 has an active contact 1311, and the stationary spring portion 132 has a stationary contact 1321. The armature assembly 14 includes a housing 141 and a permanent magnet 142 disposed within the housing 141. The permanent magnet 142 can be a permanent magnet. The armature assembly 14 also includes two armatures, with the permanent magnet 142 disposed between the two armatures, and the housing 141 enclosing the two armatures. The auxiliary contact assembly 15 includes an auxiliary moving spring portion 151 and an auxiliary stationary spring portion 152. The auxiliary moving spring portion 151 is provided with an auxiliary moving contact 1515, and the auxiliary stationary spring portion 152 is provided with an auxiliary stationary contact (not shown in the figure). When the current flow direction of the coil 121 in the electromagnetic assembly 12 changes, the armature assembly 14 can be driven to rotate relative to the base 11 by the magnetic field force. The rotation of the armature assembly 14 relative to the base 11 can cause a part of the active spring portion 131 to move closer to or away from the main stationary spring portion 132, so that the active contact 1311 on the active spring portion 131 and the main stationary contact 1321 on the main stationary spring portion 132 can contact or separate. The rotation of the armature assembly 14 relative to the base 11 can also synchronously cause the auxiliary moving spring portion 151 to move closer to or away from the auxiliary stationary spring portion 152, so that the auxiliary moving contact 1515 and the auxiliary stationary contact can contact or separate.

[0054] In some embodiments, the main contact assembly 13 is connected to the charging pile power module control circuit. For example, the active spring portion 131 and the main stationary spring portion 132 are electrically connected to the positive and negative terminals of the charging pile power module control circuit, respectively. The contact and separation of the active contact 1311 and the main stationary contact 1321 can control the conduction and disconnection of the charging pile power module control circuit. The auxiliary contact assembly 15 can be connected to a monitoring circuit to monitor the contact status of the main contact assembly 13. Of course, in other embodiments, the auxiliary contact assembly 15 can also be connected to any other suitable circuit, such as a low-power load circuit with a power lower than that of the circuit to which the main contact assembly 13 is connected. In this case, the main contact assembly 13 and the auxiliary contact assembly 15 can be used to switch between high-power loads and low-power loads. This application does not specifically limit the application of the auxiliary contact assembly 15.

[0055] Furthermore, referring to Figures 5, 6, and 7, in some embodiments, the auxiliary moving spring portion 151 is disposed on the armature assembly 14 and can move towards or away from the auxiliary stationary spring portion 152 as the armature assembly 14 rotates relative to the base 11, so that the auxiliary moving contact 1515 and the auxiliary stationary contact contact or separate. For example, the auxiliary moving spring portion 151 is connected to the housing 141, and the portion of the auxiliary moving spring portion 151 with the auxiliary moving contact 1515 extends out of the housing 141. Referring to Figure 6, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary moving spring portion 151 moves towards the auxiliary stationary spring portion 152, it can drive the auxiliary moving spring portion 151 to move towards the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 contacts the auxiliary stationary contact. Referring to Figure 7, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary moving spring portion 151 moves away from the auxiliary stationary spring portion 152, it can drive the auxiliary moving spring portion 151 to move away from the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 separates from the auxiliary stationary contact. Therefore, the magnetic latching relay 10 can achieve forced conduction or forced disconnection of the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152. The auxiliary contact assembly 15 is less likely to fail to switch on and off normally due to deformation of the auxiliary moving spring portion 151, and the requirements for micro-deformation of the auxiliary moving spring portion 151 are lower. This helps to improve the defects caused by the deformation of the moving spring in the magnetic latching relay 10, thereby improving the structural reliability of the auxiliary contact assembly 15.

[0056] Referring to Figures 3 and 5, in some embodiments, the active spring portion 131 and the main stationary spring portion 132 are inserted and fixed to the base 11, with the active spring portion 131 located between the main stationary spring portion 132 and the armature assembly 14. The magnetic latching relay 10 also includes a linkage 16 connected to the active spring portion 131. The housing 141 has a mating end 1411 away from the auxiliary active spring portion 151. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves away from the main stationary spring portion 132, the mating end 1411 can drive the active spring portion 131 to move away from the main stationary spring portion 132 via the linkage 16 until the active contact 1311 and the main stationary contact 1321 separate. For example, the magnetic latching relay 10 also includes a mating portion 161 located at one end of the linkage 16 near the electromagnetic component 12 and facing the armature assembly 14. The mating end 1411 is located on the side of the mating portion 161 facing the active spring portion 131. When the mating end 1411 moves away from the main stationary spring portion 132, it can abut against and push the mating portion 161 to drive the linkage 16, thereby driving a portion of the active spring portion 131 to move away from the main stationary spring portion 132. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves towards the main stationary spring portion 132, the force applied by the mating end 1411 to the mating portion 161 causes the linkage 16 to drive the active spring portion 131 towards the main stationary spring portion 132 until the active contact 1311 contacts the main stationary contact 1321.

[0057] In the embodiments shown in Figures 3 and 5, the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing away from the active spring portion 131. It can be understood that when the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move towards the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 come into contact, the end of the housing 141 connected to the auxiliary moving spring portion 151 will simultaneously move towards the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 and the auxiliary stationary contact come into contact. When the mating end 1411 moves away from the active contact 1311 so that the active contact 1311 and the main stationary contact 1321 separate, the end of the housing 141 connected to the auxiliary moving spring portion 151 will simultaneously move away from the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 and the auxiliary stationary contact separate. In other words, in this embodiment, when the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing away from the active spring portion 131, if the main contact assembly 13 is turned on, the auxiliary contact assembly 15 is also turned on; if the main contact assembly 13 is turned off, the auxiliary contact assembly 15 is also turned off.

[0058] Referring to Figures 8 and 9, in some embodiments, the auxiliary stationary spring portion 152 is located on the side of the auxiliary movable spring portion 151 facing the active spring portion 131. When the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move towards the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 contact, the housing 141 simultaneously drives the auxiliary movable spring portion 151 to move away from the auxiliary stationary spring portion 152 so that the auxiliary movable contact 1515 and the auxiliary stationary contact separate. When the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move away from the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 separate, the housing 141 simultaneously drives the auxiliary movable spring portion 151 to move towards the auxiliary stationary spring portion 152 so that the auxiliary movable contact 1515 and the auxiliary stationary contact contact. In other words, in this embodiment, when the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing the active spring portion 131, if one of the main contact assembly 13 and the auxiliary contact assembly 15 is on, the other is off, and if one is off, the other is on.

[0059] The mounting method of the auxiliary moving spring portion 151 on the housing 141 is not limited, as long as the auxiliary moving spring portion 151 can move towards or away from the auxiliary stationary spring portion 152 as the armature assembly 14 rotates relative to the base 11. Referring to Figures 10, 11 and 12, in some embodiments, the auxiliary moving spring portion 151 includes a body portion 1511 and a contact portion 1512. The body portion 1511 is connected to the housing 141, the contact portion 1512 is connected to the body portion 1511 and at least partially extends out of the housing 141, and the auxiliary moving contact 1515 is provided on the contact portion 1512. The main body 1511 has a through hole 1516. The armature assembly 14 also includes a limiting structure 143. The limiting structure 143 includes a connecting part 1431 and a limiting part 1432. The connecting part 1431 is connected to the housing 141, and the limiting part 1432 is connected to the end of the connecting part 1431 away from the housing 141. The limiting part 1432 can pass through the through hole 1516 so that at least a part of the connecting part 1431 is located in the through hole 1516. When the connecting part 1431 is located in the through hole 1516, the auxiliary moving spring part 151 can rotate around the connecting part 1431 until the limiting part 1432 abuts against the side of the auxiliary moving spring part 151 facing away from the housing 141. Referring to Figure 13, the state in which the limiting part 1432 passes through the through hole 1516 such that at least a portion of the connecting part 1431 is located within the through hole 1516 is defined as the first state of the auxiliary spring part 151. In the first state, the limiting part 1432 is located on the side of the body part 1511 facing away from the housing 141 and is opposite to the through hole 1516. Referring to Figures 14 and 15, when the connecting part 1431 is located within the through hole 1516, the auxiliary spring part 151 can rotate around the connecting part 1431 to switch from the first state to the second state. In the second state, the limiting part 1432 abuts against the side of the auxiliary spring part 151 facing away from the housing 141 to limit and fix the auxiliary spring part 151 to the housing 141. Figure 14 shows the intermediate state of the auxiliary spring part 151 switching between the first and second states, and Figure 15 shows the second state of the auxiliary spring part 151.

[0060] In some embodiments, the housing 141, the connecting part 1431, and the limiting part 1432 are integral structures, for example, prepared by integral molding injection molding process. Of course, the limiting structure 143 can also be fixed to the housing 141 by any other applicable method such as plugging or gluing.

[0061] In the process of assembling the auxiliary spring portion 151 onto the housing 141, the aforementioned magnetic latching relay 10 first moves the limiting portion 1432 through the through hole 1516 to the side of the auxiliary spring portion 151 facing away from the housing 141, so that at least a portion of the connecting portion 1431 is located within the through hole 1516. Then, the auxiliary spring portion 151 rotates around the connecting portion 1431 until the limiting portion 1432 abuts against the side of the auxiliary spring portion 151 facing away from the housing 141. The auxiliary spring portion 151 can then be fixed relative to the housing 141 under the limiting action of the limiting portion 1432. This simplifies the assembly process of the auxiliary spring portion 151 and reduces assembly difficulty and manufacturing cost. Meanwhile, when it is necessary to remove the auxiliary moving spring part 151 from the housing 141, the auxiliary moving spring part 151 is rotated until the limiting part 1432 is opposite to the through hole 1516, so that the limiting part 1432 no longer abuts against the auxiliary moving spring part 151. This allows the limiting part 1432 to pass through the through hole 1516 and remove the auxiliary moving spring part 151 from the housing 141, which helps to improve the convenience of replacing or maintaining the auxiliary moving spring part 151.

[0062] Referring to Figures 10, 11, and 12, in some embodiments, the body portion 1511 is provided with a positioning hole 1517, and the armature assembly 14 also includes a positioning protrusion 144 provided on the housing 141. When the auxiliary moving spring portion 151 rotates around the connecting portion 1431 to switch from the first state to the second state, at least a portion of the positioning protrusion 144 is embedded in the positioning hole 1517. The positioning protrusion 144 and the positioning hole 1517 cooperate to improve the positioning accuracy of the auxiliary moving spring portion 151 in the second state. At the same time, the limiting portion 1432 limits the auxiliary moving spring portion 151 to prevent it from swaying in the second state, which helps to improve the performance reliability of the magnetic latching relay 10.

[0063] In some embodiments, the auxiliary spring portion 151 further includes an isolation portion 1513 disposed on the side of the body portion 1511 facing away from the housing 141. Referring to Figures 14 and 15, it can be understood that during the process of the auxiliary spring portion 151 rotating from the first state to the second state, the limiting portion 1432 will be opposite to the body portion 1511. When the limiting portion 1432 is opposite to the body portion 1511, the isolation portion 1513 can abut against the limiting portion 1432 to prevent the limiting portion 1432 from directly rubbing against the edge of the through hole 1516 of the body portion 1511 during the rotation of the auxiliary spring portion 151, thereby reducing the risk of scraping of the auxiliary spring portion 151. At the same time, it is also beneficial to prevent the auxiliary spring portion 151 from shaking by the tight fit between the height of the isolation portion 1513 and the limiting portion 1432.

[0064] In some embodiments, the two opposing edges of the body portion 1511 are bent toward the side away from the housing 141 to form a slope or arcuate surface for the positioning protrusion 144 to slide into the space between the housing 141 and the body portion 1511. For example, the outer surface of the flange 1514 formed by the two edges of the body portion 1511 shown in the figure forms a slope or arcuate surface. It is understood that during the rotation of the auxiliary spring portion 151 to switch from the first state to the second state, the positioning protrusion 144 will enter from outside the body portion 1511 between the body portion 1511 and the housing 141 until the positioning protrusion 144 is embedded in the positioning hole 1517. By providing flanges 1514 on the two opposite edges of the main body 1511 to form a slope or arc surface, when the auxiliary moving spring part 151 rotates to the positioning protrusion 144, the positioning protrusion 144 can slide along the slope or arc surface formed by the flange 1514 into the space between the main body 1511 and the housing 141, without directly scraping against the side of the main body 1511, which helps to reduce the risk of scraping of the main body 1511 due to the scraping of the positioning protrusion 144.

[0065] In the embodiment shown in Figure 12, the flange 1514 and the isolation part 1513 are arranged at intervals, which helps to avoid the auxiliary moving spring part 151 and the limiting part 1432 having an excessively large mating surface, thus affecting the positioning reliability of the auxiliary moving spring part 151 relative to the housing 141. The flange 1514 and the isolation part 1513 can both be integral with the main body part 1511. Referring to Figure 15, in some embodiments, the portions of the auxiliary moving spring portion 151 corresponding to the two opposite edges of the main body portion 1511 are bent away from the housing 141 and stacked on the side of the main body portion 1511 facing away from the housing 141 to form an isolation portion 1513. That is, in this embodiment, the isolation portion 1513 and the flange 1514 are of the same structure. The flange 1514 is folded onto the side of the main body portion 1511 facing away from the housing 141 to simultaneously form the isolation portion 1513 for abutting against the limiting portion 1432. At the same time, the outer surface of the flange 1514 portion can also form a bevel or arc surface for the positioning protrusion 144 to slide into. Thus, by folding the auxiliary moving spring portion 151, both the flange 1514 and the isolation portion 1513 can be formed simultaneously, which helps to simplify the manufacturing process of the auxiliary moving spring portion 151 and reduce the manufacturing cost.

[0066] Of course, the connection between the auxiliary moving spring part 151 and the housing 141 is not limited to the above description. In some other embodiments, the armature assembly 14 also includes a protrusion structure provided on the housing 141. The protrusion structure can be provided in the through hole 1516 of the body part 1511, and the body part 1511 and the housing 141 can be fixedly connected by any applicable method such as riveting or gluing the protrusion structure to the body part 1511.

[0067] Please refer to Figures 16, 17, and 18. In some other embodiments, the armature assembly 14 further includes a mating structure 145 disposed on the housing 141. A fastening groove 1451 is formed between the mating structure 145 and the housing 141. Part of the body portion 1511 is embedded and detachably fixed in the fastening groove 1451. The detachable connection between the auxiliary moving spring portion 151 and the housing 141 is achieved by embedding, which also helps to simplify the assembly and disassembly process of the auxiliary moving spring portion 151. The detachable fixing method of the body portion 1511 in the fastening groove 1451 includes, but is not limited to, insertion, insertion, fastening, interference fit, and any applicable method.

[0068] Referring again to Figure 3, in some embodiments, the auxiliary stationary spring portion 152 is a rigid structure. The auxiliary stationary spring portion 152 passes through and is fixed to the base 11, for example, by any applicable fixing method such as adhesive dispensing. Compared to the traditional flexible auxiliary stationary spring portion, the rigid structure of the auxiliary stationary spring portion 152 avoids deformation and retraction, which would reduce the overtravel of the push card and thus prevent reduced contact reliability or even contact failure between the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152. Simultaneously, when the auxiliary moving contact 1515 and the auxiliary stationary contact are pressed together, the auxiliary moving spring portion 151 deforms, while the auxiliary stationary spring portion 152 does not deform, reducing the impact of the deformation of the auxiliary stationary spring portion 152 on the contact accuracy between the auxiliary moving contact 1515 and the auxiliary stationary contact.

[0069] The auxiliary stationary spring portion 152 can be made of a cylindrical rigid conductive material. This cylindrical structure facilitates more precise positioning of the auxiliary stationary spring portion 152 on the base 11, simplifies the assembly process of the auxiliary moving spring portion 151 on the base 11, and improves the performance and reliability of the magnetic latching relay 10. Furthermore, it simplifies the component structure of the auxiliary contact assembly 15 and the molding process of the auxiliary stationary spring portion 152, making its assembly on the base 11 easier. The auxiliary stationary spring portion 152 can be formed by cutting round or square wire, and its side contact with the auxiliary moving spring portion 151 improves the contact accuracy and reliability between them, reducing the risk of misalignment of the auxiliary stationary spring portion 152 affecting the contact state of the monitoring main contact assembly 13.

[0070] It is understood that in some embodiments, the auxiliary stationary contact can be considered as being formed by the portion of the auxiliary stationary spring portion 152 that contacts the auxiliary moving spring portion 151; that is, the auxiliary stationary contact and the auxiliary stationary spring portion 152 are an integral structure. Of course, in other embodiments, the auxiliary stationary contact and the auxiliary stationary spring portion 152 can also be separate structures, with the auxiliary stationary contact fixedly disposed on the auxiliary stationary spring portion 152.

[0071] Referring again to Figure 8, in some embodiments, the auxiliary contact assembly 15 has two spaced-apart auxiliary stationary spring portions 152, and the auxiliary moving spring portion 151 has at least two contact portions 1512. These at least two contact portions 1512 are connected to opposite edges of the body portion 1511. Each of the two contact portions 1512 has an auxiliary moving contact 1515. The auxiliary moving spring portion 151 can move with the armature assembly 14 until the two auxiliary moving contacts 1515 contact the two auxiliary stationary spring portions 152 in a one-to-one correspondence. It can be understood that the two auxiliary stationary spring portions 152 can be electrically connected to the positive and negative terminals of the monitoring circuit of the main contact assembly 13, or to the positive and negative terminals of the low-power load circuit. When the at least two contact portions 1512 contact the two auxiliary stationary spring portions 152 in a one-to-one correspondence, the auxiliary moving spring portion 151 can conduct the two auxiliary stationary spring portions 152, thereby conducting the detection circuit or low-power load circuit of the main contact assembly 13. At least two contact portions 1512 are provided on the auxiliary moving spring portion 151 to simultaneously contact the two auxiliary stationary spring portions 152 one by one. The two contact portions 1512 can move synchronously with the rotation of the armature assembly 14 to achieve contact or separation with the auxiliary stationary spring portion 152, which helps to simplify the structure of the auxiliary moving spring portion 151 and improve the performance stability of the magnetic latching relay 10.

[0072] Further, referring to Figures 10 and 12, in some embodiments, each of the two opposing edges of the body portion 1511 is connected to at least two spaced-apart contact portions 1512. When the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152 are in contact, the auxiliary moving contacts 1515 on the at least two contact portions 1512 connected to one edge of the body portion 1511 can contact different parts of one of the auxiliary stationary spring portions 152 in the axial direction. That is, the auxiliary stationary spring portion 152 is provided with at least two spaced-apart auxiliary stationary contacts in the axial direction, and the at least two auxiliary stationary contacts located on the same auxiliary stationary spring portion 152 are used to contact at least two contact portions 1512 connected to one edge of the body portion 1511. For example, in the embodiment shown in Figure 10, the auxiliary moving spring portion 151 is provided with four contact portions 1512, and the contact portions 1512 are connected in pairs to one edge of the body portion 1511. In other embodiments, the auxiliary moving spring portion 151 may also be provided with six or other numbers of contact portions 1512. The multi-point contact method between the auxiliary moving spring part 151 and the auxiliary stationary spring part 152 can improve the contact reliability of the auxiliary contact assembly 15.

[0073] In some embodiments, at least a portion of the contact portion 1512 located between the auxiliary moving contact 1515 and the body portion 1511 is arc-shaped in the extending direction of the contact portion 1512 (e.g., in the direction from the body portion 1511 to the auxiliary moving contact 1515). This configuration helps to increase the deformation space of the contact portion 1512, allowing the arc-shaped portion of the contact portion 1512 to extend and deform when the contact portion 1512 compresses the auxiliary moving spring portion 151, causing the auxiliary moving contact 1515 to contact the auxiliary stationary contact. When the contact portion 1512 separates from the auxiliary moving spring portion 151, the arc-shaped portion of the contact portion 1512 returns to its original shape. This helps to reduce the risk that the contact portion 1512 may deform due to compression with the auxiliary stationary spring portion 152 and cannot recover, thereby improving the structural reliability of the auxiliary contact assembly 15. At the same time, the arc shape increases the flexibility of the contact portion 1512, which also helps to reduce the stress generated in the auxiliary moving spring portion 151 during deformation, thereby reducing the risk of breakage of the contact portion 1512.

[0074] In some embodiments, the auxiliary moving contact 1515 is formed by the contact portion 1512 protruding towards the auxiliary stationary spring portion 152, and the auxiliary moving contact 1515, the contact portion 1512, and the body portion 1511 are an integral structure. For example, the body portion 1511 can be processed by a CNC machine tool using a punching process to make the body portion 1511 protrude to form the auxiliary moving contact 1515. This arrangement simplifies the component composition of the auxiliary moving spring portion 151, reduces the riveting process of the contact point, and improves the stability of the auxiliary moving contact 1515 on the auxiliary moving spring portion 151. Of course, in other embodiments, the auxiliary moving contact 1515 and the auxiliary moving spring portion 151 can also be a separate structure, and the auxiliary moving contact 1515 can be fixed to the auxiliary moving spring portion 151 by any applicable method such as welding, gluing, or riveting.

[0075] Second Embodiment

[0076] In addition, the assembly of auxiliary contact structures in traditional magnetic latching relays is difficult, which increases the assembly difficulty and manufacturing cost.

[0077] This application also provides a magnetic latching relay and a method for assembling the same.

[0078] A magnetic latching relay includes an armature assembly and an auxiliary moving spring portion. The armature assembly includes a housing and a permanent magnet disposed within the housing. The armature assembly also includes a limiting structure, which includes a connecting portion and a limiting portion. The connecting portion is connected to the housing, and the limiting portion is connected to the end of the connecting portion away from the housing. The auxiliary moving spring portion has a through hole, at least a portion of the connecting portion is located within the through hole, and the limiting portion is located on the side of the auxiliary moving spring portion facing away from the housing to limit the auxiliary moving spring portion to the housing.

[0079] In the process of assembling the auxiliary moving spring part onto the housing, the limiting part is first moved through the through hole to the side of the auxiliary moving spring part facing away from the housing, so that at least part of the connecting part is located in the through hole. Then, the auxiliary moving spring part is rotated around the connecting part until the limiting part limits the auxiliary moving spring part to the housing on the side of the auxiliary moving spring part facing away from the housing. The auxiliary moving spring part can then be fixed relative to the housing under the limiting action of the limiting part, which helps to simplify the assembly process of the auxiliary moving spring part and reduce the assembly difficulty and manufacturing cost.

[0080] In one embodiment, the limiting part and the connecting part pass through the through hole in sequence, and the limiting part abuts against the side of the auxiliary moving spring portion facing away from the housing.

[0081] In one embodiment, the length direction of the through hole forms an angle with the length direction of the limiting portion.

[0082] In one embodiment, the length direction of the through hole is perpendicular to the length direction of the limiting portion.

[0083] In one embodiment, when the limiting part abuts against the side of the auxiliary moving spring portion facing away from the housing, the auxiliary moving spring portion can rotate relative to the housing around the connecting part until the limiting part aligns with the through hole, so that the auxiliary moving spring portion can be disengaged from the housing. This makes the disassembly of the auxiliary moving spring portion from the housing more convenient, facilitating the replacement or maintenance of the auxiliary moving spring portion.

[0084] In one embodiment, the length of the limiting portion is greater than the radial dimension of the connecting portion, the length of the limiting portion is less than or equal to the length of the through hole and greater than the width of the through hole, and the radial dimension of the connecting portion is less than or equal to the width of the through hole.

[0085] In one embodiment, the auxiliary spring portion has a positioning hole facing the housing, and the magnetic latching relay further includes a positioning protrusion on the housing. When the limiting portion abuts against the side of the auxiliary spring portion facing away from the housing, the auxiliary spring portion can rotate around the connecting portion until at least a portion of the positioning protrusion is embedded in the positioning hole. The positioning protrusion and positioning hole working together improve the positioning accuracy of the auxiliary spring portion in the second state. Simultaneously, the limiting portion's positioning of the auxiliary spring portion prevents it from swaying in the second state, thus improving the performance reliability of the magnetic latching relay.

[0086] In one embodiment, the magnetic latching relay further includes an isolation portion disposed on the side of the auxiliary moving spring portion facing away from the housing. The isolation portion abuts against the limiting portion to isolate the limiting portion and the auxiliary moving spring portion. The isolation portion abuts against the limiting portion to prevent the limiting portion from directly rubbing against the edge of the through hole in the main body portion during rotation of the auxiliary moving spring portion, thereby reducing the risk of scraping of the auxiliary moving spring portion. It also helps to prevent the auxiliary moving spring portion from wobbling by tightly fitting the height of the isolation portion with the limiting portion.

[0087] In one embodiment, the two opposite edges of the auxiliary moving spring portion are bent away from the housing to form a slope or arc-shaped surface that allows the positioning protrusion to slide into the space between the housing and the auxiliary moving spring portion. When the auxiliary moving spring portion rotates to the positioning protrusion, the positioning protrusion can slide into the space between the body and the housing along the slope or arc-shaped surface formed by the flange, without directly scraping against the side of the body, which helps to reduce the risk of scratches on the body caused by the positioning protrusion.

[0088] In one embodiment, the isolation portion is formed by bending the two opposing edges of the auxiliary moving spring portion toward the side away from the housing and stacking them on the side of the auxiliary moving spring portion facing away from the housing. This simplifies the manufacturing process of the auxiliary moving spring portion and reduces manufacturing costs.

[0089] In one embodiment, the auxiliary moving spring portion includes a body portion, a contact portion, and an auxiliary moving contact. The through hole is disposed on the body portion, the contact portion is connected to the body portion, and the auxiliary moving contact is disposed on the contact portion.

[0090] In one embodiment, the auxiliary moving contact is formed by a partial protrusion of the auxiliary moving spring portion, and the auxiliary moving contact and the contact portion are integrally structured. This simplifies the component composition of the auxiliary moving spring portion, reduces the riveting process of the contact point, and improves the stability of the auxiliary moving contact on the auxiliary moving spring portion.

[0091] In one embodiment, at least a portion of the contact portion located between the auxiliary moving contact and the body portion is arc-shaped. This helps reduce the risk of the contact portion deforming irrecoverably due to compression with the auxiliary stationary spring portion, thereby improving the structural reliability of the auxiliary contact assembly. Furthermore, the arc shape increases the flexibility of the contact portion, which also helps reduce the stress generated in the auxiliary moving spring portion during deformation, thus reducing the risk of contact portion breakage.

[0092] In one embodiment, the housing, the connecting portion, and the limiting portion are an integral structure.

[0093] In one embodiment, the magnetic latching relay further includes a main contact assembly and an auxiliary stationary spring portion with an auxiliary stationary contact. The main contact assembly includes an active spring portion with an active contact and a main stationary spring portion with a main stationary contact. The armature assembly can rotate relative to the main contact assembly to move the active spring portion towards or away from the main stationary spring portion, so that the active contact and the main stationary contact make contact or separate. The auxiliary moving spring portion has an auxiliary moving contact, which can move towards or away from the auxiliary stationary spring portion as the armature assembly rotates, so that the auxiliary moving contact and the auxiliary stationary contact make contact or separate. Therefore, the magnetic latching relay can achieve forced conduction or forced disconnection of the auxiliary moving spring portion and the auxiliary stationary spring portion. The auxiliary contact assembly is less prone to failure to switch on and off properly due to deformation of the auxiliary moving spring portion, and the requirements for micro-deformation of the auxiliary moving spring portion are lower. This helps to improve the defects caused by deformation of the moving spring in the magnetic latching relay, thereby improving the structural reliability of the auxiliary contact assembly.

[0094] In one embodiment, the magnetic latching relay further includes a base, the main contact assembly is disposed on the base, the armature assembly is rotatably disposed on the base, and the auxiliary stationary spring is a rigid structure, which passes through and is fixed to the base. This reduces the impact of deformation of the auxiliary stationary spring on the contact accuracy between the auxiliary moving contact and the auxiliary stationary contact, preventing the auxiliary stationary spring from deforming and retracting, which would reduce the overtravel of the push card and lead to reduced contact reliability or even contact failure between the auxiliary moving spring and the auxiliary stationary spring. It also facilitates more precise positioning of the auxiliary stationary spring on the base, simplifies the assembly process of the auxiliary moving spring on the base, and improves the performance reliability of the magnetic latching relay. Furthermore, it simplifies the component structure of the auxiliary contact assembly and the molding process of the auxiliary stationary spring, making the assembly of the auxiliary stationary spring on the base simpler.

[0095] In one embodiment, the magnetic latching relay includes two spaced-apart auxiliary stationary spring portions. Each auxiliary moving spring portion includes a body portion and at least two contact portions. A through-hole is provided on the body portion, and the at least two contact portions are connected to opposite edges of the body portion. Each of the two contact portions has an auxiliary moving contact. The auxiliary moving spring portion can move with the armature assembly until the two auxiliary moving contacts correspondingly contact the two auxiliary stationary spring portions. The two contact portions can move synchronously with the rotation of the armature assembly to achieve contact or separation with the auxiliary stationary spring portions, which simplifies the structure of the auxiliary moving spring portion and improves the performance stability of the magnetic latching relay.

[0096] In one embodiment, each of the two opposing edges of the body portion is connected to at least two spaced-apart contact portions. When the auxiliary moving spring portion and the auxiliary stationary spring portion are in contact, the auxiliary moving contact on the at least two contact portions connected to one edge of the auxiliary moving spring portion can contact different parts of the auxiliary stationary spring portion in the axial direction of one of the auxiliary stationary spring portions. This multi-point contact between the auxiliary moving spring portion and the auxiliary stationary spring portion improves the contact reliability of the auxiliary contact assembly.

[0097] In one embodiment, the magnetic latching relay further includes a linkage connected to the active spring portion. The housing has a mating end away from the auxiliary active spring portion. When the armature assembly rotates relative to the main contact assembly to move the mating end away from the active spring portion, the mating end can drive the active spring portion to move away from the main stationary spring portion via the linkage until the active contact and the main stationary contact separate.

[0098] The auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion that faces away from the active spring portion; or,

[0099] The auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion facing the active spring portion.

[0100] A method for assembling a magnetic latching relay includes assembling an auxiliary moving spring portion onto an armature assembly. The auxiliary moving spring portion has a through hole. The armature assembly includes a housing, a permanent magnet disposed within the housing, and a limiting structure. The limiting structure includes a connecting portion connected to the housing and a limiting portion connected to the end of the connecting portion away from the housing. The assembly method includes:

[0101] This causes the limiting part to move through the through hole to the side of the auxiliary moving spring portion facing away from the housing, so that at least a portion of the connecting part is located within the through hole;

[0102] This causes the auxiliary moving spring portion to rotate around the connecting portion until the limiting portion limits the auxiliary moving spring portion to the housing on the side of the auxiliary moving spring portion facing away from the housing.

[0103] Please refer to Figures 1-5. Figures 1 and 2 are schematic diagrams of the magnetic latching relay 10 at different angles in some embodiments. Figure 3 is a cross-sectional schematic diagram of the magnetic latching relay 10 shown in Figure 2 along the AA direction. Figure 4 is a schematic diagram of the base 11 in some embodiments. Figure 5 is a schematic diagram of the magnetic latching relay 10 in some embodiments where the base 11 is omitted. The magnetic latching relay 10 provided in this application includes, but is not limited to, applications in scenarios such as charging pile power module control. The magnetic latching relay 10 can maintain the open or closed state of the contacts by means of the magnetic field force of permanent magnets 142, and can complete the switching between open and closed states under the excitation of positive (reverse) DC pulse voltage.

[0104] In some embodiments, the magnetic latching relay 10 includes a base 11, an electromagnetic assembly 12, a main contact assembly 13, an armature assembly 14, and an auxiliary contact assembly 15, all of which are disposed on the base 11. The electromagnetic assembly 12 includes a coil 121 and an iron core 122 disposed within the coil 121. The main contact assembly 13 includes an active spring portion 131 and a stationary spring portion 132. The active spring portion 131 has an active contact 1311, and the stationary spring portion 132 has a stationary contact 1321. The armature assembly 14 includes a housing 141 and a permanent magnet 142 disposed within the housing 141. The permanent magnet 142 can be a permanent magnet. In some embodiments, the armature assembly 14 further includes two armatures, with the permanent magnet 142 disposed between the two armatures, and the housing 141 enclosing the two armatures. The auxiliary contact assembly 15 includes an auxiliary moving spring portion 151 and an auxiliary stationary spring portion 152. The auxiliary moving spring portion 151 is provided with an auxiliary moving contact 1515, and the auxiliary stationary spring portion 152 is provided with an auxiliary stationary contact (not shown in the figure). When the current flow direction of the coil 121 in the electromagnetic assembly 12 changes, the armature assembly 14 can be driven to rotate relative to the base 11 by the magnetic field force. The rotation of the armature assembly 14 relative to the base 11 can cause a part of the active spring portion 131 to move closer to or away from the main stationary spring portion 132, so that the active contact 1311 on the active spring portion 131 and the main stationary contact 1321 on the main stationary spring portion 132 can contact or separate. The rotation of the armature assembly 14 relative to the base 11 can also synchronously cause the auxiliary moving spring portion 151 to move closer to or away from the auxiliary stationary spring portion 152, so that the auxiliary moving contact 1515 and the auxiliary stationary contact can contact or separate.

[0105] In some embodiments, the main contact assembly 13 is connected to the charging pile power module control circuit. For example, the active spring portion 131 and the main stationary spring portion 132 are electrically connected to the positive and negative terminals of the charging pile power module control circuit, respectively. The contact and separation of the active contact 1311 and the main stationary contact 1321 can control the conduction and disconnection of the charging pile power module control circuit. The auxiliary contact assembly 15 can be connected to a monitoring circuit to monitor the contact status of the main contact assembly 13. Of course, in other embodiments, the auxiliary contact assembly 15 can also be connected to any other suitable circuit, such as a low-power load circuit with a power lower than that of the circuit to which the main contact assembly 13 is connected. In this case, the main contact assembly 13 and the auxiliary contact assembly 15 can be used to switch between high-power loads and low-power loads. This application does not specifically limit the application of the auxiliary contact assembly 15.

[0106] Furthermore, referring to Figures 8, 9, and 10, in some embodiments, the auxiliary moving spring portion 151 is fixedly disposed on the housing 141 and can move towards or away from the auxiliary stationary spring portion 152 as the armature assembly 14 rotates relative to the base 11, so that the auxiliary moving contact 1515 and the auxiliary stationary contact contact or separate. For example, the auxiliary moving spring portion 151 is connected to the housing 141, and the portion of the auxiliary moving spring portion 151 with the auxiliary moving contact 1515 extends out of the housing 141. Referring to Figure 9, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary moving spring portion 151 moves towards the auxiliary stationary spring portion 152, it can drive the auxiliary moving spring portion 151 to move towards the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 contacts the auxiliary stationary contact. Referring to Figure 8, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary moving spring portion 151 moves away from the auxiliary stationary spring portion 152, it can drive the auxiliary moving spring portion 151 to move away from the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 separates from the auxiliary stationary contact. Therefore, the magnetic latching relay 10 can achieve forced conduction or forced disconnection of the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152. The auxiliary contact assembly 15 is less likely to fail to switch on and off normally due to deformation of the auxiliary moving spring portion 151, and the requirements for micro-deformation of the auxiliary moving spring portion 151 are lower. This helps to improve the defects caused by the deformation of the moving spring in the magnetic latching relay 10, thereby improving the structural reliability of the auxiliary contact assembly 15.

[0107] Referring to Figure 3, in some embodiments, the active spring portion 131 and the main stationary spring portion 132 are inserted and fixed to the base 11, with the active spring portion 131 located between the main stationary spring portion 132 and the armature assembly 14. The magnetic latching relay 10 also includes a linkage 16 connected to the active spring portion 131. The housing 141 has a mating end 1411 away from the auxiliary active spring portion 151. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves away from the main stationary spring portion 132, the mating end 1411 can drive the active spring portion 131 to move away from the main stationary spring portion 132 via the linkage 16 until the active contact 1311 and the main stationary contact 1321 separate. For example, the magnetic latching relay 10 also includes a mating portion 161 located at one end of the linkage 16 near the electromagnetic component 12 and facing the armature assembly 14. The mating end 1411 is located on the side of the mating portion 161 facing the active spring portion 131. When the mating end 1411 moves away from the main stationary spring portion 132, it can abut against and push the mating portion 161 to drive the linkage 16, thereby driving a portion of the active spring portion 131 to move away from the main stationary spring portion 132. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves towards the main stationary spring portion 132, the force applied by the mating end 1411 to the mating portion 161 causes the linkage 16 to drive the active spring portion 131 towards the main stationary spring portion 132 until the active contact 1311 contacts the main stationary contact 1321.

[0108] In the embodiment shown in Figure 3, the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing away from the active spring portion 131. It can be understood that when the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move towards the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 come into contact, the end of the housing 141 connected to the auxiliary moving spring portion 151 will simultaneously move towards the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 and the auxiliary stationary contact come into contact. When the mating end 1411 moves away from the active contact 1311 so that the active contact 1311 and the main stationary contact 1321 separate, the end of the housing 141 connected to the auxiliary moving spring portion 151 will simultaneously move away from the auxiliary stationary spring portion 152 until the auxiliary moving contact 1515 and the auxiliary stationary contact separate. In other words, in this embodiment, when the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing away from the active spring portion 131, if the main contact assembly 13 is turned on, the auxiliary contact assembly 15 is also turned on; if the main contact assembly 13 is turned off, the auxiliary contact assembly 15 is also turned off.

[0109] Referring to Figures 8 and 9, in some embodiments, the auxiliary stationary spring portion 152 is located on the side of the auxiliary movable spring portion 151 facing the active spring portion 131. When the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move towards the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 contact, the housing 141 simultaneously drives the auxiliary movable spring portion 151 to move away from the auxiliary stationary spring portion 152 so that the auxiliary movable contact 1515 and the auxiliary stationary contact separate. When the armature assembly 14 rotates relative to the base 11, causing the mating end 1411 to move away from the active spring portion 131 so that the active contact 1311 and the main stationary contact 1321 separate, the housing 141 simultaneously drives the auxiliary movable spring portion 151 to move towards the auxiliary stationary spring portion 152 so that the auxiliary movable contact 1515 and the auxiliary stationary contact contact. In other words, in this embodiment, when the auxiliary stationary spring portion 152 is located on the side of the auxiliary moving spring portion 151 facing the active spring portion 131, if one of the main contact assembly 13 and the auxiliary contact assembly 15 is on, the other is off, and if one is off, the other is on.

[0110] Referring to Figures 10, 11 and 12, in some embodiments, the auxiliary moving spring portion 151 includes a body portion 1511 and a contact portion 1512. The body portion 1511 is connected to the housing 141, the contact portion 1512 is connected to the body portion 1511 and extends at least partially out of the housing 141, and the auxiliary moving contact 1515 is provided on the contact portion 1512. The main body 1511 has a through hole 1516. The armature assembly 14 also includes a limiting structure 143. The limiting structure 143 includes a connecting part 1431 and a limiting part 1432. The connecting part 1431 is connected to the housing 141, and the limiting part 1432 is connected to the end of the connecting part 1431 away from the housing 141. The limiting part 1432 can pass through the through hole 1516 so that at least a part of the connecting part 1431 is located in the through hole 1516. When the connecting part 1431 is located in the through hole 1516, the auxiliary moving spring part 151 can rotate around the connecting part 1431 until the limiting part 1432 abuts against the side of the auxiliary moving spring part 151 facing away from the housing 141. Referring to Figure 13, the state in which the limiting part 1432 passes through the through hole 1516 such that at least a portion of the connecting part 1431 is located within the through hole 1516 is defined as the first state of the auxiliary spring part 151. In the first state, the limiting part 1432 is located on the side of the body part 1511 facing away from the housing 141 and is opposite to the through hole 1516. Referring to Figures 14 and 15, when the connecting part 1431 is located within the through hole 1516, the auxiliary spring part 151 can rotate around the connecting part 1431 to switch from the first state to the second state. In the second state, the limiting part 1432 is on the side of the auxiliary spring part 151 facing away from the housing 141 to limit the auxiliary spring part 151 onto the housing 141. Figure 14 shows the intermediate state of the auxiliary spring part 151 switching between the first and second states, and Figure 15 shows the second state of the auxiliary spring part 151.

[0111] In the process of assembling the auxiliary spring portion 151 onto the housing 141, the aforementioned magnetic latching relay 10 first moves the limiting portion 1432 through the through hole 1516 to the side of the auxiliary spring portion 151 facing away from the housing 141, so that at least a portion of the connecting portion 1431 is located within the through hole 1516. Then, the auxiliary spring portion 151 rotates around the connecting portion 1431 until the limiting portion 1432 limits the auxiliary spring portion 151 onto the housing 141 on the side of the auxiliary spring portion 151 facing away from the housing 141. The auxiliary spring portion 151 can then be fixed relative to the housing 141 under the limiting action of the limiting portion 1432, which helps to simplify the assembly process of the auxiliary spring portion 151 and reduce assembly difficulty and manufacturing cost.

[0112] Based on the magnetic latching relay 10 described in any of the above embodiments, this application also provides an assembly method for the magnetic latching relay 10, used to assemble the auxiliary moving spring portion 151 of the magnetic latching relay 10 described in any of the above embodiments onto the housing 141. The assembly method includes:

[0113] The limiting part 1432 moves through the through hole 1516 to the side of the auxiliary moving spring part 151 facing away from the housing 141, so that at least a portion of the connecting part 1431 is located in the through hole 1516, thereby placing the auxiliary moving spring part 151 in the first state.

[0114] The auxiliary moving spring portion 151 is rotated around the connecting portion 1431 until the limiting portion 1432 abuts against the side of the auxiliary moving spring portion 151 facing away from the housing 141, so that the auxiliary moving spring portion 151 switches from the first state to the second state.

[0115] Understandably, in the second state, the limiting part 1432 and the connecting part 1431 pass through the through hole 1516 in sequence. The limiting part 1432 abuts against the side of the auxiliary spring part 151 facing away from the housing 141 to limit the auxiliary spring part 151 to the housing 141. The auxiliary spring part 151 can rotate relative to the housing 141 around the connecting part 1431 so as to switch from the second state to the first state, thereby enabling the auxiliary spring part 151 to be removed from the housing 141 for convenient replacement and maintenance. When it is necessary to remove the auxiliary spring portion 151 from the housing 141, the auxiliary spring portion 151 is rotated until the limiting portion 1432 is opposite to the through hole 1516, so that the limiting portion 1432 no longer abuts against the auxiliary spring portion 151. This allows the limiting portion 1432 to pass through the through hole 1516 and remove the auxiliary spring portion 151 from the housing 141, which improves the convenience of replacing or maintaining the auxiliary spring portion 151. In the second state, the length direction of the through hole 1516 and the length direction of the limiting portion 1432 form an angle, allowing the limiting portion 1432 to abut against the side of the auxiliary spring portion 151 facing away from the housing 141.

[0116] In some embodiments, the length of the limiting portion 1432 is greater than the radial dimension of the connecting portion 1431, the length of the limiting portion 1432 is less than or equal to the length of the through hole 1516, and greater than the width of the through hole 1516, and the radial dimension of the connecting portion 1431 is less than or equal to the width of the through hole 1516. Thus, when the length direction of the limiting portion 1432 is approximately parallel to the length direction of the through hole 1516, the limiting portion 1432 can pass through the through hole 1516, causing the auxiliary spring portion 151 to enter a first state. When the auxiliary spring portion 151 rotates relative to the housing 141 to a second state, the length direction of the limiting portion 1432 forms an angle with the length direction of the through hole 1516. For example, the length direction of the limiting portion 1432 may be perpendicular to the length direction of the through hole 1516, and the limiting portion 1432 can abut against the portions of the auxiliary spring portion 151 located on both sides of the through hole 1516. In the second state, the length direction of the limiting part 1432 and the length direction of the through hole 1516 can be perpendicular or at any angle, as long as the limiting part 1432 can abut against the portions of the auxiliary moving spring 151 located on both sides of the through hole 1516 to limit the auxiliary moving spring 151. It should be noted that in some embodiments, the shapes of the limiting part 1432 and the through hole 1516 can be approximately square or any other applicable shape. The length and width directions of the limiting part 1432 and the through hole 1516 are two mutually perpendicular directions parallel to the surface of the housing 141 where the connecting part 1431 is provided. The connecting part 1431 can be columnar, and the radial direction of the connecting part 1431 is parallel to the surface of the housing 141 where the connecting part 1431 is provided. Of course, the cross-section of the connecting part 1431 can also be square or any other applicable shape. Therefore, the radial dimension of the connecting part 1431 can be understood as the dimension of the connecting part 1431 in each direction parallel to the surface of the housing 141 where the connecting part 1431 is provided.

[0117] Referring to Figures 10 and 11, in some embodiments, the body portion 1511 has a positioning hole 1517 facing the housing 141, and the armature assembly 14 also includes a positioning protrusion 144 on the housing 141. When the auxiliary moving spring portion 151 rotates around the connecting portion 1431 to switch from the first state to the second state, at least a portion of the positioning protrusion 144 is embedded in the positioning hole 1517. The positioning protrusion 144 and the positioning hole 1517 working together improve the positioning accuracy of the auxiliary moving spring portion 151 in the second state. Simultaneously, the limiting portion 1432 limits the auxiliary moving spring portion 151, preventing it from swaying in the second state, thus improving the performance reliability of the magnetic latching relay 10. In some embodiments, when the length direction of the limiting portion 1432 is perpendicular to the length direction of the through hole 1516, the positioning protrusion 144 can be precisely embedded in the positioning hole 1517, so that the limiting portion 1432 and the auxiliary moving spring portion 151 can be relatively fixed.

[0118] In some embodiments, the auxiliary spring portion 151 further includes an isolation portion 1513 on the side of the body portion 1511 facing away from the housing 141. Referring to Figures 14 and 15, it can be understood that during the process of the auxiliary spring portion 151 rotating from the first state to the second state, the limiting portion 1432 will be opposite to the body portion 1511. When the limiting portion 1432 is opposite to the body portion 1511, the isolation portion 1513 can abut against the limiting portion 1432 to prevent the limiting portion 1432 from directly rubbing against the edge of the through hole 1516 of the body portion 1511 during the rotation of the auxiliary spring portion 151, thereby reducing the risk of scraping of the auxiliary spring portion 151. At the same time, it is also beneficial to prevent the auxiliary spring portion 151 from shaking by the tight fit between the height of the isolation portion 1513 and the limiting portion 1432.

[0119] In some embodiments, the housing 141, the connecting part 1431, and the limiting part 1432 are integral structures, for example, made of plastic material by integral injection molding, which helps to simplify the manufacturing process of the magnetic latching relay 10 and reduce the manufacturing cost.

[0120] In some embodiments, the two opposing edges of the body portion 1511 are bent toward the side away from the housing 141 to form a slope or arcuate surface for the positioning protrusion 144 to slide into the space between the housing 141 and the body portion 1511. For example, the outer surface of the flange 1514 formed by the two edges of the body portion 1511 shown in the figure forms a slope or arcuate surface. It is understood that during the rotation of the auxiliary spring portion 151 to switch from the first state to the second state, the positioning protrusion 144 will enter from outside the body portion 1511 between the body portion 1511 and the housing 141 until the positioning protrusion 144 is embedded in the positioning hole 1517. By providing flanges 1514 on the two opposite edges of the main body 1511 to form a slope or arc surface, when the auxiliary moving spring part 151 rotates to the positioning protrusion 144, the positioning protrusion 144 can slide along the slope or arc surface formed by the flange 1514 into the space between the main body 1511 and the housing 141, without directly scraping against the side of the main body 1511, which helps to reduce the risk of scraping of the main body 1511 due to the scraping of the positioning protrusion 144.

[0121] In the embodiment shown in Figure 12, the flange 1514 and the isolation part 1513 are arranged at intervals, which helps to avoid the auxiliary moving spring part 151 and the limiting part 1432 having an excessively large mating surface, thus affecting the positioning reliability of the auxiliary moving spring part 151 relative to the housing 141. The flange 1514 and the isolation part 1513 can both be integral with the main body part 1511. Referring to Figure 15, in some embodiments, the portions of the auxiliary moving spring portion 151 corresponding to the two opposite edges of the main body portion 1511 are bent away from the housing 141 and stacked on the side of the main body portion 1511 facing away from the housing 141 to form an isolation portion 1513. That is, in this embodiment, the isolation portion 1513 and the flange 1514 are of the same structure. The flange 1514 is folded onto the side of the main body portion 1511 facing away from the housing 141 to simultaneously form the isolation portion 1513 for abutting against the limiting portion 1432. At the same time, the outer surface of the flange 1514 portion can also form a bevel or arc surface for the positioning protrusion 144 to slide into. Thus, by folding the auxiliary moving spring portion 151, both the flange 1514 and the isolation portion 1513 can be formed simultaneously, which helps to simplify the manufacturing process of the auxiliary moving spring portion 151 and reduce the manufacturing cost.

[0122] Referring again to Figures 3 and 4, in some embodiments, the auxiliary stationary spring portion 152 is a rigid structure. The auxiliary stationary spring portion 152 passes through and is fixed to the base 11, for example, by any applicable fixing method such as adhesive dispensing. Compared to the traditional flexible auxiliary stationary spring portion, the rigid structure of the auxiliary stationary spring portion 152 avoids deformation and retraction, which would reduce the overtravel of the push card and thus prevent reduced contact reliability or even contact failure between the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152. Simultaneously, when the auxiliary moving contact 1515 and the auxiliary stationary contact are pressed together, the auxiliary moving spring portion 151 deforms, while the auxiliary stationary spring portion 152 does not deform, reducing the impact of the deformation of the auxiliary stationary spring portion 152 on the contact accuracy between the auxiliary moving contact 1515 and the auxiliary stationary contact.

[0123] The auxiliary stationary spring portion 152 can be made of a cylindrical rigid conductive material. This cylindrical structure facilitates more precise positioning of the auxiliary stationary spring portion 152 on the base 11, simplifies the assembly process of the auxiliary moving spring portion 151 on the base 11, and improves the performance and reliability of the magnetic latching relay 10. Furthermore, it simplifies the component structure of the auxiliary contact assembly 15 and the molding process of the auxiliary stationary spring portion 152, making its assembly on the base 11 easier. The auxiliary stationary spring portion 152 can be formed by cutting round or square wire, and its side contact with the auxiliary moving spring portion 151 improves the contact accuracy and reliability between them, reducing the risk of misalignment of the auxiliary stationary spring portion 152 affecting the contact state of the monitoring main contact assembly 13.

[0124] It is understood that in some embodiments, the auxiliary stationary contact can be considered as being formed by the portion of the auxiliary stationary spring portion 152 that contacts the auxiliary moving spring portion 151; that is, the auxiliary stationary contact and the auxiliary stationary spring portion 152 are an integral structure. Of course, in other embodiments, the auxiliary stationary contact and the auxiliary stationary spring portion 152 can also be separate structures, with the auxiliary stationary contact fixedly disposed on the auxiliary stationary spring portion 152.

[0125] Referring again to Figures 8 and 9, in some embodiments, the auxiliary contact assembly 15 has two spaced-apart auxiliary stationary spring portions 152, and the auxiliary moving spring portion 151 has at least two contact portions 1512. The at least two contact portions 1512 are connected to opposite edges of the body portion 1511. Each of the two contact portions 1512 has an auxiliary moving contact 1515. The auxiliary moving spring portion 151 can move with the armature assembly 14 until the two auxiliary moving contacts 1515 contact the two auxiliary stationary spring portions 152 in a one-to-one correspondence. It can be understood that the two auxiliary stationary spring portions 152 can be electrically connected to the positive and negative terminals of the monitoring circuit of the main contact assembly 13, or to the positive and negative terminals of the low-power load circuit. When the at least two contact portions 1512 contact the two auxiliary stationary spring portions 152 in a one-to-one correspondence, the auxiliary moving spring portion 151 can conduct the two auxiliary stationary spring portions 152, thereby conducting the detection circuit or low-power load circuit of the main contact assembly 13. At least two contact portions 1512 are provided on the auxiliary moving spring portion 151 to simultaneously contact the two auxiliary stationary spring portions 152 one by one. The two contact portions 1512 can move synchronously with the rotation of the armature assembly 14 to achieve contact or separation with the auxiliary stationary spring portion 152, which helps to simplify the structure of the auxiliary moving spring portion 151 and improve the performance stability of the magnetic latching relay 10.

[0126] Further, referring to Figures 10 and 12, in some embodiments, each of the two opposing edges of the body portion 1511 is connected to at least two spaced-apart contact portions 1512. When the auxiliary moving spring portion 151 and the auxiliary stationary spring portion 152 are in contact, the auxiliary moving contacts 1515 on the at least two contact portions 1512 connected to one edge of the body portion 1511 can contact different parts of one of the auxiliary stationary spring portions 152 in the axial direction. That is, the auxiliary stationary spring portion 152 is provided with at least two spaced-apart auxiliary stationary contacts in the axial direction, and the at least two auxiliary stationary contacts located on the same auxiliary stationary spring portion 152 are used to contact at least two contact portions 1512 connected to one edge of the body portion 1511. For example, in the embodiment shown in Figure 12, the auxiliary moving spring portion 151 is provided with four contact portions 1512, and the contact portions 1512 are connected in pairs to one edge of the body portion 1511. In other embodiments, the auxiliary moving spring portion 151 may also be provided with six or other numbers of contact portions 1512. The multi-point contact method between the auxiliary moving spring part 151 and the auxiliary stationary spring part 152 can improve the contact reliability of the auxiliary contact assembly 15.

[0127] In some embodiments, at least a portion of the contact portion 1512 located between the auxiliary moving contact 1515 and the body portion 1511 is arc-shaped in the extending direction of the contact portion 1512 (e.g., in the direction from the body portion 1511 to the auxiliary moving contact 1515). This configuration helps to increase the deformation space of the contact portion 1512, allowing the arc-shaped portion of the contact portion 1512 to extend and deform when the contact portion 1512 compresses the auxiliary moving spring portion 151, causing the auxiliary moving contact 1515 to contact the auxiliary stationary contact. When the contact portion 1512 separates from the auxiliary moving spring portion 151, the arc-shaped portion of the contact portion 1512 returns to its original shape. This helps to reduce the risk that the contact portion 1512 may deform due to compression with the auxiliary stationary spring portion 152 and cannot recover, thereby improving the structural reliability of the auxiliary contact assembly 15. At the same time, the arc shape increases the flexibility of the contact portion 1512, which also helps to reduce the stress generated in the auxiliary moving spring portion 151 during deformation, thereby reducing the risk of breakage of the contact portion 1512.

[0128] In some embodiments, the auxiliary moving contact 1515 is formed by the contact portion 1512 protruding towards the auxiliary stationary spring portion 152, and the auxiliary moving contact 1515, the contact portion 1512, and the body portion 1511 are an integral structure. For example, the body portion 1511 can be processed by a CNC machine tool using a punching process to make the body portion 1511 protrude to form the auxiliary moving contact 1515. This arrangement simplifies the component composition of the auxiliary moving spring portion 151, reduces the riveting process of the contact point, and improves the stability of the auxiliary moving contact 1515 on the auxiliary moving spring portion 151. Of course, in other embodiments, the auxiliary moving contact 1515 and the auxiliary moving spring portion 151 can also be a separate structure, and the auxiliary moving contact 1515 can be fixed to the auxiliary moving spring portion 151 by any applicable method such as welding, gluing, or riveting.

[0129] 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.

[0130] 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 latching relay, comprising: The main contact assembly includes an active spring portion with active contacts and a main stationary spring portion with main stationary contacts. An armature assembly includes a housing and a permanent magnet disposed in the housing. The armature assembly is rotatable relative to the main contact assembly to move a portion of the active spring toward or away from the main stationary spring, such that the active contact and the main stationary contact contact or separate. An auxiliary contact assembly includes an auxiliary moving spring portion with an auxiliary moving contact and an auxiliary stationary spring portion with an auxiliary stationary contact. The auxiliary moving spring portion is disposed on the armature assembly and can move toward or away from the auxiliary stationary spring portion as the armature assembly rotates, so that the auxiliary moving contact and the auxiliary stationary contact come into contact or separate.

2. The magnetic latching relay according to claim 1, wherein, The magnetic latching relay also includes a base, the main contact assembly is disposed on the base, the armature assembly is rotatably disposed on the base, and the auxiliary stationary spring is a rigid structure, which passes through and is fixed to the base.

3. The magnetic latching relay according to claim 2, wherein, The auxiliary static spring is a columnar structure that passes through the base.

4. The magnetic latching relay according to claim 1, wherein, The auxiliary contact assembly has two spaced-apart auxiliary stationary spring portions. Each auxiliary moving spring portion includes a body portion and at least two contact portions. The body portion is connected to the housing, and the at least two contact portions are connected to the two opposite edges of the body portion. Each of the two contact portions is provided with an auxiliary moving contact. The auxiliary moving spring portion can move with the armature assembly until the two auxiliary moving contacts contact the two auxiliary stationary spring portions one-to-one.

5. The magnetic latching relay according to claim 4, wherein, Each of the two opposing edges of the main body is connected to at least two spaced-apart contact portions. When the auxiliary moving spring portion and the auxiliary stationary spring portion are in contact, the auxiliary moving contact on the at least two contact portions connected to one edge of the main body portion can contact different parts of the auxiliary stationary spring portion in the axial direction of one of the auxiliary stationary spring portions.

6. The magnetic latching relay according to claim 4, wherein, At least a portion of the contact portion located between the auxiliary moving contact and the main body portion is arc-shaped.

7. The magnetic latching relay according to claim 4, wherein, The main body has a through hole, and the armature assembly also includes a protrusion structure disposed on the housing and located in the through hole. The housing is fixedly connected to the main body through the protrusion structure.

8. The magnetic latching relay according to claim 4, wherein, The armature assembly also includes a mating structure disposed on the housing, wherein a fastening groove is formed between the mating structure and the housing, and a portion of the body is embedded in and detachably fixed within the fastening groove.

9. The magnetic latching relay according to claim 4, wherein, The main body has a through hole, and the armature assembly also includes a limiting structure. The limiting structure includes a connecting part and a limiting part. The connecting part is connected to the housing, and the limiting part is connected to the end of the connecting part away from the housing. The auxiliary moving spring has a first state and a second state. In the first state, the connecting part is located in the through hole, and the limiting part is located on the side of the main body facing away from the housing and opposite to the through hole. The auxiliary moving spring can rotate around the connecting part to switch from the first state to the second state. In the second state, the limiting part abuts against the side of the auxiliary moving spring facing away from the housing.

10. The magnetic latching relay according to claim 9, wherein, The main body is provided with a positioning hole, and the armature assembly further includes a positioning protrusion provided on the housing. In the second state, the positioning protrusion is at least partially embedded in the positioning hole.

11. The magnetic latching relay according to claim 10, wherein, The auxiliary spring portion also includes an isolation portion disposed on the side of the main body facing away from the housing. In the second state, the isolation portion abuts against the side of the limiting portion facing the housing.

12. The magnetic latching relay according to claim 11, wherein, The two opposite edges of the body portion are bent toward the side away from the housing to form a slope or arc surface for the positioning protrusion to slide into the space between the housing and the body portion.

13. The magnetic latching relay according to claim 12, wherein, The auxiliary spring portion, corresponding to the two opposite edges of the main body, is bent away from the housing and stacked on the side of the main body facing away from the housing to form the isolation portion.

14. The magnetic latching relay according to claim 4, wherein, The auxiliary moving contact is formed by the contact portion protruding toward the auxiliary stationary spring portion, and the auxiliary moving contact, the contact portion, and the body portion are an integral structure.

15. The magnetic latching relay according to any one of claims 1-14, wherein, The magnetic latching relay further includes a linkage component connected to the active spring portion. The housing has a mating end away from the auxiliary active spring portion. When the armature assembly rotates relative to the main contact assembly to move the mating end away from the active spring portion, the mating end can drive a portion of the active spring portion away from the main stationary spring portion via the linkage component until the active contact and the main stationary contact separate. The auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion that faces away from the active spring portion; Alternatively, the auxiliary stationary spring portion is located on the side of the auxiliary moving spring portion facing the active spring portion.

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