Magnetic latching relay and assembling method thereof

Abstract

The invention relates to a magnetic latching relay and an assembling method thereof. The magnetic latching relay comprises an armature assembly, the armature assembly comprises a shell and a permanent magnet arranged in the shell, the armature assembly further comprises a limiting structure, the limiting structure comprises a connecting part and a limiting part, the connecting part is connected to the shell, and the limiting part is connected to the end, away from the shell, of the connecting part; the auxiliary movable spring part is provided with a through hole, at least part of the connecting part is located in the through hole, and the limiting part is located on the side, opposite to the shell, of the auxiliary movable spring part so as to limit the auxiliary movable spring part on the shell. According to the magnetic latching relay, the assembly process of the auxiliary movable spring part is simplified, and the assembly difficulty and the preparation cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a magnetic latching relay and an assembly method thereof. Background Art

[0002] The magnetic latching relay automatically connects and disconnects the circuit. The normally closed or normally open state of the magnetic latching relay depends on the action of the permanent magnet. The switching state of the magnetic latching relay is completed by triggering a pulse electrical signal of a certain width. The open and closed states of the contacts of the magnetic latching relay are maintained by the magnetic force generated by the permanent magnet. When the contacts of the relay need to be opened or closed, only the positive (negative) DC pulse voltage is needed to excite the coil.

[0003] As the application field of relays continues to expand, magnetic latching relays with auxiliary contact structures have emerged. The auxiliary contacts are mainly used to feedback the contact status of the main contacts. However, in traditional magnetic latching relays, the auxiliary contact structure is difficult to assemble, which increases the difficulty of assembly and the cost of preparation. Summary of the invention

[0004] Based on this, it is necessary to provide a magnetic latching relay and an assembly method thereof to address the problem of difficulty in assembling the auxiliary contact structure in a traditional magnetic latching relay.

[0005] A magnetic latching relay, comprising:

[0006] An armature assembly includes a shell and a permanent magnet disposed in the shell, the armature assembly also includes a limiting structure, the limiting structure includes a connecting portion and a limiting portion, the connecting portion is connected to the shell, and the limiting portion is connected to an end of the connecting portion away from the shell; and,

[0007] The auxiliary dynamic spring part is provided with a through hole, at least part of the connecting part is located in the through hole, and the limiting part is located on the side of the auxiliary dynamic spring part facing away from the shell to limit the auxiliary dynamic spring part on the shell.

[0008] In the above-mentioned magnetic holding relay, during the process of assembling the auxiliary movable spring part onto the housing, the limiting part is first moved through the through hole to the side of the auxiliary movable spring part facing away from the housing, so that at least part of the connecting part is located in the through hole, and then the auxiliary movable spring part is rotated around the connecting part until the limiting part limits the auxiliary movable spring part on the housing at the side of the auxiliary movable spring part facing away from the housing. The auxiliary movable spring part can be fixed relative to the housing under the limiting action of the limiting part, which is conducive to simplifying the assembly process of the auxiliary movable spring part and reducing the assembly difficulty and preparation cost.

[0009] In one of the embodiments, the limiting portion and the connecting portion pass through the through hole in sequence, and the limiting portion abuts against a side of the auxiliary dynamic spring portion facing away from the housing.

[0010] In one of the embodiments, a length direction of the through hole forms an angle with a length direction of the limiting portion.

[0011] In one embodiment, the length direction of the through hole is perpendicular to the length direction of the limiting portion.

[0012] In one embodiment, when the limiting portion abuts against the side of the auxiliary spring portion facing away from the housing, the auxiliary spring portion can rotate relative to the housing around the connecting portion until the limiting portion is opposite to the through hole, so that the auxiliary spring portion can be removed from the housing. Thus, the removal process of the auxiliary spring portion from the housing can be made more convenient, which is beneficial to the replacement or maintenance of the auxiliary spring portion.

[0013] 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.

[0014] In one embodiment, the auxiliary spring portion is provided with a positioning hole toward the housing, and the magnetic latching relay further includes a positioning protrusion provided on the housing, and 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 part of the positioning protrusion is embedded in the positioning hole. The positioning protrusion and the positioning hole are provided to cooperate with each other, which is conducive to improving the positioning accuracy of the auxiliary spring portion in the second state, and at the same time, the limiting portion cooperates with the limiting portion to limit the auxiliary spring portion to prevent the auxiliary spring portion from swinging in the second state, which is conducive to improving the performance reliability of the magnetic latching relay.

[0015] In one embodiment, the magnetic latching relay further comprises an isolating portion provided on the side of the auxiliary spring portion facing away from the housing, and the isolating portion is used to abut against the limiting portion to isolate the limiting portion and the auxiliary spring portion. The isolating portion can abut against the limiting portion to prevent the auxiliary spring portion from directly rubbing against the edge of the through hole of the main body during the rotation process, thereby reducing the risk of scraping of the auxiliary spring portion, and at the same time, it is also beneficial to prevent the auxiliary spring portion from shaking by tightly matching the height of the isolating portion with the limiting portion.

[0016] In one embodiment, two opposite edges of the auxiliary spring portion are bent toward a side away from the housing to form an inclined surface or an arc surface for the positioning protrusion to slide into between the housing and the auxiliary spring portion. When the auxiliary spring portion rotates to the positioning protrusion, the positioning protrusion can slide into between the main body and the housing along the inclined surface or the arc surface formed by the flange, and will not directly scrape against the side of the main body, which is conducive to reducing the risk of scraping caused by the positioning protrusion on the main body.

[0017] In one embodiment, the isolation portion is formed by two opposite edges of the auxiliary spring portion being bent toward a side away from the housing and overlapping a side of the auxiliary spring portion facing away from the housing, which is beneficial to simplifying the preparation process of the auxiliary spring portion and reducing the preparation cost.

[0018] In one embodiment, the auxiliary dynamic spring portion includes a main body portion, a contact portion and an auxiliary dynamic contact, the through hole is provided in the main body portion, the contact portion is connected to the main body portion, and the auxiliary dynamic contact is provided on the contact portion.

[0019] In one embodiment, the auxiliary moving contact is formed by a protrusion of the auxiliary moving spring portion, and the auxiliary moving contact and the contact portion are an integrated structure, which is beneficial to simplify the parts structure of the auxiliary moving spring portion, reduce the process of riveting the contact point, and improve the stability of the auxiliary moving contact on the auxiliary moving spring portion 151.

[0020] In one embodiment, at least a portion of the contact portion between the auxiliary movable contact and the main body is arc-shaped, which is beneficial to reducing the risk of the contact portion being deformed and unable to recover due to the compression with the auxiliary static spring portion, thereby improving the structural reliability of the auxiliary contact assembly. At the same time, the arc shape increases the flexibility of the contact portion, and is also beneficial to reducing the stress generated by the auxiliary movable spring portion during the deformation process, thereby reducing the risk of the contact portion breaking.

[0021] In one embodiment, the shell, the connecting portion and the limiting portion are an integrated structure.

[0022] In one embodiment, the magnetic latching relay further comprises a main contact assembly and an auxiliary static spring part provided with an auxiliary static contact, the main contact assembly comprises an active spring part provided with an active contact and a main static spring part provided with a main static contact, the armature assembly can rotate relative to the main contact assembly so that part of the active spring part moves toward or away from the main static spring part, so that the active contact and the main static contact are in contact or separation, the auxiliary movable spring part is provided with an auxiliary movable contact, the auxiliary movable spring part can move toward or away from the auxiliary static spring part with the rotation of the armature assembly, so that the auxiliary movable contact and the auxiliary static contact are in contact or separation. Thus, the magnetic latching relay can realize the forced conduction or forced disconnection of the auxiliary movable spring part and the auxiliary static spring part, the auxiliary contact assembly is not easily unable to be normally switched on and off due to the deformation of the auxiliary movable spring part, and the micro-movement deformation requirement of the auxiliary movable spring part is lower, which is conducive to improving the defects of the magnetic latching relay caused by the deformation of the movable spring, thereby facilitating the improvement of the structural reliability of the auxiliary contact assembly.

[0023] 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 static spring part is a rigid structure, and the auxiliary static spring part is passed through and fixed on the base. It is possible to reduce the influence of the deformation of the auxiliary static spring part on the contact accuracy between the auxiliary moving contact and the auxiliary static contact, avoid the problem that the auxiliary static spring part deforms and retreats, resulting in a reduction in the overtravel of the push card, and the contact reliability of the auxiliary moving spring part and the auxiliary static spring part is reduced or even the contact fails, and it is also beneficial to make the positioning of the auxiliary static spring part on the base more accurate, simplify the assembly process of the auxiliary moving spring part on the base, and help improve the performance reliability of the magnetic latching relay. In addition, it is also beneficial to simplify the parts structure of the auxiliary contact assembly, simplify the molding process of the auxiliary static spring part, and make the assembly of the auxiliary static spring part on the base simpler.

[0024] In one embodiment, the magnetic latching relay includes two spaced auxiliary static spring parts, the auxiliary dynamic spring part includes a main body and at least two contact parts, the through hole is provided on the main body, at least two contact parts are connected to two opposite edges of the main body, the two contact parts are provided with the auxiliary dynamic contact, the auxiliary dynamic spring part can move with the armature assembly to the two auxiliary dynamic contacts and contact with the two auxiliary static spring parts one by one. The two contact parts can move synchronously with the rotation of the armature assembly to achieve contact or separation with the auxiliary static spring part, which is conducive to simplifying the structure of the auxiliary dynamic spring part and improving the performance stability of the magnetic latching relay.

[0025] In one embodiment, at least two spaced contact portions are connected to any of the two opposite edges of the main body, and when the auxiliary movable spring portion contacts the auxiliary static spring portion, the auxiliary movable contacts connected to at least two contact portions on one edge of the auxiliary movable spring portion can contact different portions of the auxiliary static spring portion in the axial direction of one of the auxiliary static spring portions. The multi-point contact between the auxiliary movable spring portion and the auxiliary static spring portion can improve the contact reliability of the auxiliary contact assembly.

[0026] In one embodiment, the magnetic latching relay further comprises a linkage member, the linkage member is 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 so that the mating end moves in a direction away from the active spring portion, the mating end can drive part of the active spring portion to move in a direction away from the main static spring portion through the linkage member until the active contact and the main static contact are separated; wherein,

[0027] The auxiliary static spring portion is located on a side of the auxiliary dynamic spring portion facing away from the active spring portion; or,

[0028] The auxiliary static spring portion is located on a side of the auxiliary dynamic spring portion facing the active spring portion.

[0029] A method for assembling a magnetic latching relay, for assembling an auxiliary spring portion on an armature assembly, wherein the auxiliary spring portion is provided with a through hole, the armature assembly comprises a housing, a permanent magnet disposed in the housing, and a limiting structure, wherein the limiting structure comprises a connecting portion connected to the housing and a limiting portion connected to an end of the connecting portion away from the housing, the assembling method comprising:

[0030] The limiting portion moves through the through hole to a side of the auxiliary dynamic spring portion facing away from the housing, so that at least a portion of the connecting portion is located in the through hole;

[0031] The auxiliary dynamic spring portion is made to rotate around the connecting portion until the limiting portion limits the auxiliary dynamic spring portion on the housing at a side of the auxiliary dynamic spring portion facing away from the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of a magnetic latching relay in some embodiments.

[0033] Figure 2 Schematic diagram of the structure of the magnetic latching relay from another angle in some embodiments.

[0034] Figure 3 for Figure 2The cross-sectional schematic diagram of the magnetic latching relay along the AA direction is shown.

[0035] Figure 4 Schematic diagram of the structure of the base in some embodiments.

[0036] Figure 5 This is a schematic diagram of the structure of a magnetic latching relay in some embodiments in which the base is omitted.

[0037] Figure 6 for Figure 5 The schematic diagram of the structure in which the auxiliary moving spring part and the auxiliary static spring part of the magnetic holding relay are in contact is shown.

[0038] Figure 7 Schematic diagram of the structure in which an auxiliary dynamic spring portion contacts two auxiliary static spring portions in some embodiments.

[0039] Figure 8 Schematic diagram of the structure of the armature assembly in some embodiments.

[0040] Fig. 9 Schematic diagram of the structure of the auxiliary spring part in some embodiments.

[0041] Fig.10 Schematic diagram of the structure of the auxiliary spring part in some embodiments in the first state.

[0042] Fig.11 Schematic diagram of the structure of the auxiliary spring part switching between the first state and the second state in some embodiments.

[0043] Fig.12 Schematic diagram of the structure in which the auxiliary spring portion is in the second state in some embodiments.

[0044] 10. Magnetic holding relay; 11. Base; 12. Electromagnetic assembly; 121. Coil; 122. Iron core; 13. Main contact assembly; 131. Active spring part; 1311. Active contact; 132. Main static spring part; 1321. Main static contact; 14. Armature assembly; 141. Shell; 1411. Mating end; 142. Permanent magnet; 143. Limiting structure; 1431. Connecting part; 1432. Limiting part; 144. Positioning protrusion; 15. Auxiliary contact assembly; 151. Auxiliary moving spring part; 1511. Main body; 1512. Contact part; 1513. Isolation part; 1514. Flanging; 1515. Auxiliary moving contact; 1516. Through hole; 1517. Positioning hole; 152. Auxiliary static spring part; 16. Linkage; 161. Mating part. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0051] See also Figure 1-Figure 5 , Figure 1 and Figure 2 They are schematic diagrams of the structure of the magnetic latching relay 10 at different angles in some embodiments, Figure 3 They are Figure 2 The cross-sectional schematic diagram of the magnetic latching relay 10 along the AA direction is shown, Figure 4 is a schematic diagram of the structure of the base 11 in some embodiments, Figure 5 The schematic diagram of the structure of the magnetic latching relay 10 in some embodiments omitting the base 11. The magnetic latching relay 10 provided in the present application includes but is not limited to being used in scenarios such as charging pile power module control, and the magnetic latching relay 10 can maintain the open and closed states of the contacts by means of the magnetic field force of a permanent magnet 142 such as a permanent magnet, and can complete the switching of the open and closed states under the action of positive (negative) DC pulse voltage excitation.

[0052] 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, wherein the electromagnetic assembly 12, the main contact assembly 13 and the auxiliary contact assembly 15 are all arranged on the base 11. The electromagnetic assembly 12 includes a coil 121 and an iron core 122 arranged in the coil 121, and the main contact assembly 13 includes an active spring part 131 and a main static spring part 132, wherein the active spring part 131 is provided with an active contact 1311, and the main static spring part 132 is provided with a main static contact 1321. The armature assembly 14 includes a housing 141 and a permanent magnet 142 arranged in the housing 141, and the permanent magnet 142 can be a permanent magnet. In some embodiments, the armature assembly 14 also includes two armatures, wherein the permanent magnet 142 is arranged between the two armatures, and the housing 141 wraps the two armatures. The auxiliary contact assembly 15 includes an auxiliary moving spring portion 151 and an auxiliary static spring portion 152. The auxiliary moving spring portion 151 is provided with an auxiliary moving contact 1515, and the auxiliary static spring portion 152 is provided with an auxiliary static contact (not shown). 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 through the magnetic field force. The rotation of the armature assembly 14 relative to the base 11 can make part of the active spring portion 131 move toward or away from the main static spring portion 132, so that the active contact 1311 on the active spring portion 131 and the main static contact 1321 on the main static spring portion 132 contact or separate. The rotation of the armature assembly 14 relative to the base 11 can also synchronously make the auxiliary moving spring portion 151 move toward or away from the auxiliary static spring portion 152, so that the auxiliary moving contact 1515 and the auxiliary static contact contact or separate.

[0053] In some embodiments, the main contact assembly 13 is connected to the control circuit of the charging pile power module, for example, the active spring part 131 and the main static spring part 132 are respectively electrically connected to the positive and negative poles of the control circuit of the charging pile power module, and the contact and separation of the active contact 1311 and the main static contact 1321 can control the conduction and disconnection of the control circuit of the charging pile power module. The auxiliary contact assembly 15 can be connected to the monitoring circuit to monitor the contact state of the main contact assembly 13. Of course, in other embodiments, the auxiliary contact assembly 15 can also be connected to any other applicable circuit, such as a low-power load circuit with a power less than that of the circuit connected to the main contact assembly 13. Then, 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.

[0054] Furthermore, combined with Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the auxiliary spring portion 151 is fixedly disposed on the housing 141, and can move toward or away from the auxiliary static spring portion 152 as the armature assembly 14 rotates relative to the base 11, so that the auxiliary moving contact 1515 and the auxiliary static contact are in contact or separated. For example, the auxiliary spring portion 151 is connected to the housing 141, and the part of the auxiliary spring portion 151 provided with the auxiliary moving contact 1515 extends out of the housing 141. Figure 6 As shown, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary movable spring portion 151 moves toward the direction close to the auxiliary static spring portion 152, the auxiliary movable spring portion 151 can be driven to move toward the direction close to the auxiliary static spring portion 152 until the auxiliary movable contact 1515 contacts the auxiliary static contact. Figure 5 As shown, when the armature assembly 14 rotates relative to the base 11 so that one end of the armature assembly 14 connected to the auxiliary movable spring portion 151 moves in a direction away from the auxiliary static spring portion 152, the auxiliary movable spring portion 151 can be driven to move in a direction away from the auxiliary static spring portion 152 until the auxiliary movable contact 1515 is separated from the auxiliary static contact. Thus, the magnetic latching relay 10 can realize the forced conduction or forced disconnection of the auxiliary movable spring portion 151 and the auxiliary static spring portion 152, and the auxiliary contact assembly 15 is not easily unable to be normally connected and disconnected due to the deformation of the auxiliary movable spring portion 151, and the micro-movement deformation requirement of the auxiliary movable spring portion 151 is lower, which is conducive to improving the defects of the magnetic latching relay 10 caused by the deformation of the movable spring, thereby facilitating the improvement of the structural reliability of the auxiliary contact assembly 15.

[0055] Combination Figure 3As shown, in some embodiments, the active spring portion 131 and the main static spring portion 132 are passed through and fixed on the base 11, and the active spring portion 131 is located between the main static spring portion 132 and the armature assembly 14. The magnetic latching relay 10 further includes a linkage 16, which is connected to the active spring portion 131, and 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 in a direction away from the main static spring portion 132, the mating end 1411 can drive the active spring portion 131 to move in a direction away from the main static spring portion 132 through the linkage 16 until the active contact 1311 and the main static contact 1321 are separated. For example, the magnetic latching relay 10 further includes a matching portion 161 disposed at one end of the linkage member 16 close to the electromagnetic assembly 12 and disposed toward the armature assembly 14, and the matching end 1411 is located on the side of the matching portion 161 facing the active spring portion 131. When the matching end 1411 moves in a direction away from the main static spring portion 132, it can abut and push the matching portion 161 to drive the linkage member 16, thereby driving the active spring portion 131 to move in a direction away from the main static spring portion 132. When the armature assembly 14 rotates relative to the base 11 so that the matching end 1411 moves in a direction close to the main static spring portion 132, the linkage member 16 drives the active spring portion 131 to move in a direction close to the main static spring portion 132 by means of the force applied by the matching end 1411 to the matching portion 161, until the active contact 1311 contacts the main static contact 1321.

[0056] exist Figure 3 In the illustrated embodiment, the auxiliary static spring portion 152 is located on the side of the auxiliary dynamic 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 so that the mating end 1411 moves toward the direction close to the active spring portion 131 so that the active contact 1311 and the main static contact 1321 are in contact, the end of the shell 141 connected to the auxiliary dynamic spring portion 151 will synchronously move toward the direction close to the auxiliary static spring portion 152 until the auxiliary dynamic contact 1515 and the auxiliary static contact are in contact. When the mating end 1411 moves toward the direction away from the active contact 1311 so that the active contact 1311 and the main static contact 1321 are separated, the end of the shell 141 connected to the auxiliary dynamic spring portion 151 will synchronously move toward the direction away from the auxiliary static spring portion 152 until the auxiliary dynamic contact 1515 and the auxiliary static contact are separated. That is to say, in this embodiment, when the auxiliary static spring portion 152 is located on the side of the auxiliary dynamic 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, and if the main contact assembly 13 is turned off, the auxiliary contact assembly 15 is also turned off.

[0057] refer to Figure 5 and Figure 6As shown, in other embodiments, the auxiliary static spring portion 152 is located on the side of the auxiliary dynamic spring portion 151 facing the active spring portion 131. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves toward the direction close to the active spring portion 131 so that the active contact 1311 and the main static contact 1321 are in contact, the housing 141 will synchronously drive the auxiliary dynamic spring portion 151 to move away from the auxiliary static spring portion 152 so that the auxiliary dynamic contact 1515 and the auxiliary static contact are separated. When the armature assembly 14 rotates relative to the base 11 so that the mating end 1411 moves toward the direction away from the active spring portion 131 so that the active contact 1311 and the main static contact 1321 are separated, the housing 141 will synchronously drive the auxiliary dynamic spring portion 151 to move toward the direction close to the auxiliary static spring portion 152 so that the auxiliary dynamic contact 1515 and the auxiliary static contact are in contact. That is to say, in this embodiment, when the auxiliary static spring portion 152 is located on the side of the auxiliary dynamic spring portion 151 facing the active spring portion 131, if one of the main contact assembly 13 and the auxiliary contact assembly 15 is turned on, the other is turned off, and when one of them is turned off, the other is turned on.

[0058] refer to Figure 7 , Figure 8 and Fig. 9 As shown, in some embodiments, the auxiliary spring portion 151 includes a main body portion 1511 and a contact portion 1512 , the main body portion 1511 is connected to the shell 141 , the contact portion 1512 is connected to the main body portion 1511 and at least partially extends out of the shell 141 , and the auxiliary moving contact 1515 is disposed on the contact portion 1512 . The body 1511 is provided with a through hole 1516. The armature assembly 14 further includes a limiting structure 143. The limiting structure 143 includes a connecting portion 1431 and a limiting portion 1432. The connecting portion 1431 is connected to the housing 141. The limiting portion 1432 is connected to one end of the connecting portion 1431 away from the housing 141. The limiting portion 1432 can pass through the through hole 1516 so that at least part of the connecting portion 1431 is located in the through hole 1516. When the connecting portion 1431 is located in the through hole 1516, the auxiliary spring portion 151 can rotate 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. Fig.10 As shown, the state in which the limiting portion 1432 passes through the through hole 1516 so that at least a portion of the connecting portion 1431 is located in the through hole 1516 is defined as the first state of the auxiliary spring portion 151. In the first state, the limiting portion 1432 is located on the side of the main body 1511 facing away from the housing 141 and opposite to the through hole 1516. Fig.11 and Fig.12As shown, when the connecting portion 1431 is located in the through hole 1516, the auxiliary spring portion 151 can rotate around the connecting portion 1431 to switch from the first state to the second state. In the second state, the limiting portion 1432 is on the side of the auxiliary spring portion 151 facing away from the housing 141 to limit the auxiliary spring portion 151 on the housing 141. Fig.11 shows an intermediate state in which the auxiliary spring portion 151 switches between the first state and the second state, Fig.12 A second state of the auxiliary dynamic spring portion 151 is shown.

[0059] In the process of assembling the auxiliary spring portion 151 to the housing 141 of the magnetic latching relay 10, the limiting portion 1432 is first moved 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 in the through hole 1516, and then the auxiliary spring portion 151 is rotated around the connecting portion 1431 until the limiting portion 1432 limits the auxiliary spring portion 151 on the housing 141 at the side of the auxiliary spring portion 151 facing away from the housing 141. The auxiliary spring portion 151 can be fixed relative to the housing 141 under the limiting action of the limiting portion 1432, which is conducive to simplifying the assembly process of the auxiliary spring portion 151 and reducing the assembly difficulty and preparation cost.

[0060] Based on the magnetic latching relay 10 described in any of the above embodiments, the present application further provides an assembly method of the magnetic latching relay 10, which is used to assemble the auxiliary spring portion 151 in the magnetic latching relay 10 described in any of the above embodiments on the housing 141, and the assembly method includes:

[0061] The limiting portion 1432 moves 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 in the through hole 1516, thereby making the auxiliary spring portion 151 in the first state;

[0062] 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 , so that the auxiliary spring portion 151 switches from the first state to the second state.

[0063] It can be understood that, in the second state, the limiting portion 1432 and the connecting portion 1431 pass through the through hole 1516 in sequence, and the limiting portion 1432 abuts against the side of the auxiliary spring portion 151 facing away from the shell 141 to limit the auxiliary spring portion 151 on the shell 141, and the auxiliary spring portion 151 can rotate around the connecting portion 1431 relative to the shell 141 to be able to switch from the second state to the first state, so that the auxiliary spring portion 151 can be removed from the shell 141 to achieve convenient replacement and maintenance of the auxiliary spring portion 151. When the auxiliary spring portion 151 needs to be removed 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, and the limiting portion 1432 passes through the through hole 1516 to remove the auxiliary spring portion 151 from the housing 141, which is conducive to improving 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, so that the limiting portion 1432 can abut against the side of the auxiliary spring portion 151 facing away from the housing 141.

[0064] 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 substantially parallel to the length direction of the through hole 1516, the limiting portion 1432 can pass through the through hole 1516 to allow the auxiliary spring portion 151 to enter the first state, and when the auxiliary spring portion 151 rotates relative to the housing 141 to the 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 can 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 portion 1432 and the length direction of the through hole 1516 can be perpendicular or at any angle in an inclined state, as long as the limiting portion 1432 can abut against the portion of the auxiliary spring portion 151 located on both sides of the through hole 1516 to limit the auxiliary spring portion 151. It should be noted that in some embodiments, the shapes of the limiting portion 1432 and the through hole 1516 can be roughly square or any other applicable shape, and the length direction and width direction of the limiting portion 1432 and the through hole 1516 are two mutually perpendicular directions parallel to the surface of the housing 141 where the connecting portion 1431 is provided, and the connecting portion 1431 can be columnar, and the radial direction of the connecting portion 1431 is parallel to the surface of the housing 141 where the connecting portion 1431 is provided. Of course, the cross section of the connecting portion 1431 can also be square or any other applicable shape, and the radial dimension of the connecting portion 1431 can be understood as the dimension of the connecting portion 1431 in each direction on the surface parallel to the housing 141 where the connecting portion 1431 is provided.

[0065] Combination Figure 7 and Figure 8As shown, in some embodiments, the body 1511 is provided with a positioning hole 1517 toward the housing 141, and the armature assembly 14 further includes a positioning protrusion 144 provided on the housing 141. When the auxiliary 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 is provided to cooperate with the positioning hole 1517, which is conducive to improving the positioning accuracy of the auxiliary spring portion 151 in the second state. At the same time, the auxiliary spring portion 151 is prevented from swinging in the second state by the limiting portion 1432, which is conducive to 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 exactly embedded in the positioning hole 1517, so that the limiting portion 1432 and the auxiliary spring portion 151 can be relatively fixed.

[0066] In some embodiments, the auxiliary spring portion 151 further includes an isolation portion 1513 disposed on a side of the main body portion 1511 facing away from the housing 141. Fig.11 and Fig.12 As shown, it can be understood that in the process of the auxiliary dynamic spring part 151 rotating from the first state to the second state, the limiting portion 1432 will be opposite to the main body 1511. When the limiting portion 1432 is opposite to the main body 1511, the isolating portion 1513 can abut against the limiting portion 1432 to avoid the auxiliary dynamic spring part 151 from directly rubbing against the edge of the through hole 1516 of the main body 1511 during the rotation process, thereby reducing the risk of scraping of the auxiliary dynamic spring part 151, and at the same time, it is also beneficial to prevent the auxiliary dynamic spring part 151 from shaking by tightly matching the height of the isolating portion 1513 with the limiting portion 1432.

[0067] In some embodiments, the housing 141 , the connecting portion 1431 and the limiting portion 1432 are an integrated structure, for example, made of plastic material by integral injection molding, which is beneficial to simplifying the preparation process of the magnetic latching relay 10 and reducing the preparation cost.

[0068] In some embodiments, two opposite edges of the body 1511 are bent toward a side away from the housing 141 to form an inclined surface or arc surface for the positioning protrusion 144 to slide into between the housing 141 and the body 1511. For example, the outer side surface of the flange 1514 formed by the two edges of the body 1511 shown in the figure forms an inclined surface or arc surface. It can be understood that during the process of the auxiliary spring portion 151 rotating to switch from the first state to the second state, the positioning protrusion 144 will enter between the body 1511 and the housing 141 from the outside of the body 1511 until the positioning protrusion 144 is embedded in the positioning hole 1517. By setting flanges 1514 on two opposite edges of the main body 1511 to form an inclined surface or an arc-shaped surface, when the auxiliary spring part 151 rotates to the positioning protrusion 144, the positioning protrusion 144 can slide into between the main body 1511 and the shell 141 along the inclined surface or the arc-shaped surface formed by the flange 1514, and will not directly scrape the side of the main body 1511, which is beneficial to reduce the risk of scraping caused by the scraping of the positioning protrusion 144 on the main body 1511.

[0069] exist Fig. 9 In the embodiment shown, the flange 1514 and the isolation portion 1513 are arranged at intervals, which is conducive to preventing the matching surface between the auxiliary spring portion 151 and the limiting portion 1432 from being too large and affecting the positioning reliability of the auxiliary spring portion 151 relative to the housing 141. The flange 1514 and the isolation portion 1513 can be an integrated structure with the main body 1511. Fig.12 As shown, in other embodiments, the two edges of the auxiliary spring portion 151 corresponding to the main body portion 1511 are bent toward the side away from the housing 141 and overlapped 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, and the flange 1514 is folded to the side of the main body portion 1511 facing away from the housing 141 to form the isolation portion 1513 for contacting with the limiting portion 1432, and the outer side surface of the flange 1514 can also form an inclined surface or an arc surface for the positioning protrusion 144 to slide into. Therefore, the flange 1514 and the isolation portion 1513 can be formed simultaneously by folding the auxiliary spring portion 151, which is conducive to simplifying the preparation process of the auxiliary spring portion 151 and reducing the preparation cost.

[0070] Please see again Figure 3 and Figure 4As shown, in some embodiments, the auxiliary static spring part 152 is a rigid structure, and the auxiliary static spring part 152 is passed through and fixed on the base 11, for example, fixed on the base 11 by any suitable fixing method such as dispensing. Compared with the traditional flexible auxiliary static spring part, the auxiliary static spring part 152 with a rigid structure can avoid the auxiliary static spring 152 part from deforming and retreating, resulting in a reduction in the overtravel of the push card, thereby avoiding the problem of reduced contact reliability or even contact failure between the auxiliary moving spring part 151 and the auxiliary static spring part 152. At the same time, when the auxiliary moving contact 1515 is in compression contact with the auxiliary static contact, the auxiliary moving spring part 151 is deformed, while the auxiliary static spring part 152 is not deformed, which can reduce the influence of the deformation of the auxiliary static spring part 152 on the contact accuracy between the auxiliary moving contact 1515 and the auxiliary static contact.

[0071] The auxiliary static spring part 152 can be a columnar rigid conductive material. The auxiliary static spring part 152 adopts a columnar structure, which is conducive to making the positioning of the auxiliary static spring part 152 on the base 11 more accurate, simplifying the assembly process of the auxiliary dynamic spring part 151 on the base 11, and improving the performance reliability of the magnetic latching relay 10. In addition, it is also conducive to simplifying the part structure of the auxiliary contact assembly 15, simplifying the molding process of the auxiliary static spring part 152, and making the assembly of the auxiliary static spring part 152 on the base 11 easier. The auxiliary static spring part 152 can be formed by cutting round wire or square wire, and contacting the auxiliary dynamic spring part 151 by the side, which is conducive to improving the contact accuracy and reliability between the auxiliary static spring part 152 and the auxiliary dynamic spring part 151, and reducing the misalignment of the auxiliary static spring part 152 and affecting the contact state of the monitoring main contact assembly 13.

[0072] It can be understood that, in some embodiments, the auxiliary static contact can be regarded as formed by the portion of the auxiliary static spring portion 152 that is used to contact the auxiliary moving spring portion 151, that is, the auxiliary static contact and the auxiliary static spring portion 152 are an integrated structure. Of course, in other embodiments, the auxiliary static contact and the auxiliary static spring portion 152 can also be a split structure, and the auxiliary static contact is fixedly arranged on the auxiliary static spring portion 152.

[0073] Please see again Figure 5 and Figure 6In some embodiments, the auxiliary contact assembly 15 is provided with two spaced auxiliary static spring portions 152, the auxiliary dynamic spring portion 151 has at least two contact portions 1512, at least two contact portions 1512 are connected to two opposite edges of the body portion 1511, and auxiliary dynamic contacts 1515 are provided on the two contact portions 1512. The auxiliary dynamic spring portion 151 can move with the armature assembly 14 to the two auxiliary dynamic contacts 1515 and contact the two auxiliary static spring portions 152 one by one. It can be understood that the two auxiliary static spring portions 152 can be electrically connected to the positive and negative electrodes of the monitoring circuit of the main contact assembly 13, or electrically connected to the positive and negative electrodes of the low-power load circuit. When the at least two contact portions 1512 contact the two auxiliary static spring portions 152 one by one, the auxiliary dynamic spring portion 151 can conduct the two auxiliary static spring portions 152, thereby conducting the detection circuit or the low-power load circuit of the main contact assembly 13. At least two contact portions 1512 are arranged on the auxiliary movable spring portion 151 to contact the two auxiliary static spring portions 152 one by one at the same time. The two contact portions 1512 can synchronously move with the rotation of the armature assembly 14 to achieve contact or separation with the auxiliary static spring portion 152, which is beneficial to simplify the structure of the auxiliary movable spring portion 151 and improve the performance stability of the magnetic holding relay 10.

[0074] Furthermore, combined with Figure 7 and Fig. 9 As shown, in some embodiments, at least two spaced contact portions 1512 are connected to any of the two opposite edges of the main body 1511. When the auxiliary dynamic spring portion 151 and the auxiliary static spring portion 152 are in contact, the auxiliary dynamic contacts 1515 on the at least two contact portions 1512 connected to one edge of the main body 1511 can contact different parts of the auxiliary static spring portion 152 in the axial direction of one of the auxiliary static spring portions 152. In other words, the auxiliary static spring portion 152 is provided with at least two spaced auxiliary static contacts along the axial direction, and the at least two auxiliary static contacts located on the same auxiliary static spring portion 152 are used to contact at least two contact portions 1512 connected to one edge of the main body 1511. For example, in Fig. 9 In the illustrated embodiment, the auxiliary spring portion 151 is provided with four contact portions 1512, and the contact portions 1512 are connected to one edge of the main body portion 1511 in pairs. In other embodiments, the auxiliary spring portion 151 may also be provided with six or other numbers of contact portions 1512. The multi-point contact between the auxiliary spring portion 151 and the auxiliary static spring portion 152 can improve the contact reliability of the auxiliary contact assembly 15.

[0075] In some embodiments, at least a portion of the contact portion 1512 located between the auxiliary movable contact 1515 and the body portion 1511 is arc-shaped in the extension direction of the contact portion 1512 (for example, in the direction from the body portion 1511 to the auxiliary movable contact 1515). Such a configuration is conducive to increasing the deformation space of the contact portion 1512, so that when the contact portion 1512 squeezes the auxiliary movable spring portion 151 so that the auxiliary movable contact 1515 and the auxiliary static contact contact, the arc-shaped portion on the contact portion 1512 can be extended and deformed, and when the contact portion 1512 is separated from the auxiliary movable spring portion 151, the arc-shaped portion on the contact portion 1512 is restored, which is conducive to reducing the risk of the contact portion 1512 being deformed and unable to be restored due to squeezing with the auxiliary static spring portion 152, thereby facilitating the improvement of the structural reliability of the auxiliary contact assembly 15. At the same time, the arc-shaped configuration increases the flexibility of the contact portion 1512, and is also conducive to reducing the stress generated by the auxiliary movable spring portion 151 during the deformation process, thereby reducing the risk of the contact portion 1512 breaking.

[0076] In some embodiments, the auxiliary moving contact 1515 is formed by the contact portion 1512 partially protruding toward the auxiliary static spring portion 152, and the auxiliary moving contact 1515, the contact portion 1512 and the main body 1511 are an integrated structure. For example, the main body 1511 can be processed by a CNC machine tool using a punching process so that the main body 1511 partially protrudes to form the auxiliary moving contact 1515. Such a setting is conducive to simplifying the component composition of the auxiliary moving spring portion 151, reducing the process of riveting the contact point, and improving the setting 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 split structure, and the auxiliary moving contact 1515 is fixed to the auxiliary moving spring portion 151 by any applicable method such as welding, gluing, riveting, etc.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A magnetic latching relay, characterized in that: include: An armature assembly comprises a shell and a permanent magnet disposed in the shell, the armature assembly further comprises a limiting structure, the limiting structure comprises a connecting portion and a limiting portion, the connecting portion is connected to the shell, and the limiting portion is connected to an end of the connecting portion away from the shell; and, The auxiliary dynamic spring part is provided with a through hole, at least part of the connecting part is located in the through hole, and the limiting part is located on the side of the auxiliary dynamic spring part facing away from the shell to limit the auxiliary dynamic spring part on the shell.

2. The magnetic latching relay according to claim 1, characterized in that: The limiting portion and the connecting portion pass through the through hole in sequence, and the limiting portion abuts against a side of the auxiliary dynamic spring portion facing away from the housing.

3. The magnetic latching relay according to claim 2, characterized in that: The length direction of the through hole forms an angle with the length direction of the limiting portion.

4. The magnetic latching relay according to claim 3, characterized in that: The length direction of the through hole and the length direction of the limiting portion are perpendicular to each other.

5. The magnetic latching relay according to claim 2, characterized in that: When the limiting portion abuts against the side of the auxiliary dynamic spring portion facing away from the housing, the auxiliary dynamic spring portion can rotate relative to the housing around the connecting portion until the limiting portion is opposite to the through hole, so that the auxiliary dynamic spring portion can be removed from the housing.

6. The magnetic latching relay according to claim 1, characterized in that: 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.

7. The magnetic latching relay according to claim 1, characterized in that: The auxiliary spring part is provided with a positioning hole toward the shell, and the magnetic holding relay also includes a positioning protrusion provided on the shell. When the limiting portion abuts against the side of the auxiliary spring part facing away from the shell, the auxiliary spring part can rotate around the connecting portion until at least part of the positioning protrusion is embedded in the positioning hole.

8. The magnetic latching relay according to claim 7, characterized in that: The magnetic latching relay further comprises an isolating portion disposed on a side of the auxiliary dynamic spring portion facing away from the housing, wherein the isolating portion is used to abut against the limiting portion to isolate the limiting portion from the auxiliary dynamic spring portion.

9. The magnetic latching relay according to claim 8, characterized in that: Two opposite edges of the auxiliary dynamic spring portion are bent toward a side away from the housing to form an inclined surface or an arc surface for the positioning protrusion to slide into between the housing and the auxiliary dynamic spring portion.

10. The magnetic latching relay according to claim 9, characterized in that: The isolation portion is formed by two opposite edges of the auxiliary dynamic spring portion being bent toward a side away from the housing and overlapping a side of the auxiliary dynamic spring portion facing away from the housing.

11. The magnetic latching relay according to claim 1, characterized in that: The auxiliary dynamic spring part comprises a main body, a contact part and an auxiliary dynamic contact point, the through hole is arranged in the main body, the contact part is connected to the main body, and the auxiliary dynamic contact point is arranged on the contact part.

12. The magnetic latching relay according to claim 11, characterized in that: The auxiliary moving contact is formed by partially protruding the auxiliary moving spring portion, and the auxiliary moving contact and the contact portion are an integrated structure.

13. The magnetic latching relay according to claim 11, characterized in that: At least a portion of the contact portion located between the auxiliary movable contact and the main body is arc-shaped.

14. The magnetic latching relay according to claim 1, characterized in that: The shell, the connecting portion and the limiting portion are an integrated structure.

15. The magnetic latching relay according to any one of claims 1 to 14, characterized in that: The magnetic holding relay also includes a main contact assembly and an auxiliary static spring part provided with an auxiliary static contact, the main contact assembly includes an active spring part provided with an active contact and a main static spring part provided with a main static contact, the armature assembly can rotate relative to the main contact assembly so that part of the active spring part moves toward or away from the main static spring part, so that the active contact and the main static contact are in contact or separation, the auxiliary moving spring part is provided with an auxiliary moving contact, and the auxiliary moving spring part can move toward or away from the auxiliary static spring part as the armature assembly rotates, so that the auxiliary moving contact and the auxiliary static contact are in contact or separation.

16. The magnetic latching relay according to claim 15, characterized in that: The magnetic latching relay also includes a base, the main contact assembly is arranged on the base, the armature assembly is rotatably arranged on the base, and the auxiliary static spring part is a rigid structure, and the auxiliary static spring part is passed through and fixed on the base.

17. The magnetic latching relay according to claim 15, characterized in that: The magnetic holding relay includes two spaced-apart auxiliary static spring parts, the auxiliary dynamic spring part includes a main body and at least two contact parts, the through hole is provided on the main body, at least two contact parts are connected to two opposite edges of the main body, the two contact parts are provided with the auxiliary dynamic contacts, and the auxiliary dynamic spring part can move with the armature assembly to the two auxiliary dynamic contacts and contact the two auxiliary static spring parts one by one.

18. The magnetic latching relay according to claim 17, characterized in that: Any one of the two opposite edges of the main body is connected with at least two spaced-apart contact portions, and when the auxiliary dynamic spring portion and the auxiliary static spring portion are in contact, the auxiliary dynamic contacts on at least two contact portions connected to one edge of the auxiliary dynamic spring portion can contact different parts of the auxiliary static spring portion in the axial direction of one of the auxiliary static spring portions.

19. The magnetic latching relay according to claim 15, characterized in that: The magnetic latching relay further comprises a linkage member, the linkage member is 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 so that the mating end moves in a direction away from the active spring portion, the mating end can drive a part of the active spring portion to move in a direction away from the main static spring portion through the linkage member until the active contact and the main static contact are separated; wherein, The auxiliary static spring part is located on a side of the auxiliary dynamic spring part facing away from the active spring part; Alternatively, the auxiliary static spring portion is located on a side of the auxiliary dynamic spring portion facing the active spring portion.

20. A method for assembling a magnetic latching relay, characterized in that: The auxiliary spring part is used to assemble the auxiliary spring part on the armature assembly, the auxiliary spring part is provided with a through hole, the armature assembly includes a housing, a permanent magnet arranged in the housing, and a limiting structure, the limiting structure includes a connecting part connected to the housing and a limiting part connected to an end of the connecting part away from the housing, and the assembling method includes: The limiting portion moves through the through hole to a side of the auxiliary dynamic spring portion facing away from the housing, so that at least a portion of the connecting portion is located in the through hole; The auxiliary dynamic spring portion is made to rotate around the connecting portion until the limiting portion limits the auxiliary dynamic spring portion on the housing at a side of the auxiliary dynamic spring portion facing away from the housing.

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