Small-size three-phase magnetic latching relay

Abstract

The utility model belongs to the technical field of relays, and particularly relates to a small-size three-phase magnetic latching relay, which comprises a magnetic latching relay body formed by assembling an assembling base, a first cover plate and a second cover plate, a load cavity and a driving cavity are oppositely arranged in the magnetic latching relay body, and three groups of contact assemblies are equidistantly assembled in the load cavity. The contact assembly comprises a moving plate assembly and a static plate assembly which are oppositely arranged, an armature assembly is rotationally assembled in the driving cavity, a coil assembly used for enabling the armature assembly to swing in a compound mode is assembled in the driving cavity, and a linkage plate used for enabling the armature assembly and the reed to be in linkage to achieve connection and disconnection is movably arranged in the driving cavity; the contact assembly realizes accurate positioning and stable fixation of each component in multiple directions through a plurality of reinforcing ribs and fixing grooves matched with the reinforcing ribs, enhances the stability of the components under complex working conditions, greatly improves the working reliability and durability of the relay, reduces the overall size of the relay through a compact layout mode, and improves the reliability and durability of the relay. And the application field is effectively widened.

Description

Technical Field

[0001] This utility model belongs to the field of relay technology, specifically a small-volume three-phase magnetic latching relay. Background Technology

[0002] A three-phase magnetic latching relay is a power controller that operates using the principle of electromagnetic induction and the magnetic force of permanent magnets. It is mainly used in power systems, industrial automation, communication systems, and large equipment control for protection, control, switching, and regulation. It plays an important role in electrical control systems and has broad application prospects.

[0003] The existing three-phase magnetic latching relay is mainly composed of the following parts: coil, iron core, armature, moving and stationary contacts, as well as housing and auxiliary components. Working principle: It works based on the magnetic latching principle. The internal permanent magnet maintains the normal contact state. Only when a specific positive or reverse DC pulse voltage is received, the coil generates a magnetic field and interacts with the permanent magnet, driving the armature to switch the contact circuit on and off. After that, the permanent magnet maintains the new state.

[0004] Currently, existing three-phase magnetic latching relays have the following drawbacks: their internal component fixing structure is rudimentary, and the fixing methods for moving, spring, and stationary contacts are mostly limited to glue, which can easily loosen and shift under complex operating conditions, leading to poor contact, arcing, and overheating, reducing reliability and lifespan, and threatening circuit safety. In terms of layout, the load chamber and drive chamber are poorly planned, resulting in a large size that cannot be adapted to modern electronic devices and electrical systems with limited space, such as small smart meters and compact industrial control modules, thus limiting the application scope and increasing design costs. They also have poor versatility, as the three-phase design lacks standardization, making it difficult to adapt to different devices and requiring additional modification and debugging, increasing engineering difficulty and costs, which is not conducive to widespread application. Therefore, to address the above problems, a small-volume three-phase magnetic latching relay is proposed. Utility Model Content

[0005] To overcome the shortcomings of existing three-phase magnetic latching relays, this invention features a robust structure for each component, exhibiting excellent stability under complex operating conditions. Furthermore, its optimized layout and high integration, along with its compact design, significantly reduce the overall size of the relay, enabling it to easily adapt to space-constrained devices such as small smart meters and compact industrial automation control modules. This effectively broadens its application scope, resulting in a small-volume three-phase magnetic latching relay.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A small-volume three-phase magnetic latching relay of this utility model includes a magnetic latching relay body composed of an assembly base, a first cover plate, and a second cover plate. A load cavity and a drive cavity are arranged opposite to each other in the magnetic latching relay body. Three sets of contact assemblies are equidistantly assembled in the load cavity. The contact assembly includes a moving plate assembly and a stationary plate assembly arranged opposite to each other. The moving plate assembly includes a moving plate, a spring, and a moving contact on the spring. The stationary plate assembly includes a stationary plate and a stationary contact. An armature assembly is rotatably assembled in the drive cavity. A coil assembly for making the armature assembly swing back is assembled in the drive cavity. A linkage plate for making the armature assembly and the spring move together to achieve on and off states is movably arranged in the drive cavity.

[0007] Preferably, one end of the moving piece is provided with a first bending portion, and the load cavity is provided with a first reinforcing rib, a second reinforcing rib, and a first fixing groove adapted to the first bending portion.

[0008] Preferably, a first positioning part is fixedly provided on one side of the spring, a third reinforcing rib is provided in the load cavity, and a second fixing groove adapted to the first positioning part is provided on one side of the third reinforcing rib.

[0009] Preferably, a second positioning part is fixedly provided on one side of the stationary plate, a fourth reinforcing rib is provided in the load cavity, and a third fixing groove adapted to the stationary plate and a fourth fixing groove adapted to the second positioning part are provided on one side of the fourth reinforcing rib.

[0010] Preferably, the drive cavity is equipped with a positioning plate for assembling the armature assembly. The positioning plate has a through hole that matches the central axis of the armature assembly. A hollow positioning post and a positioning rod are fixedly installed in the drive cavity. A positioning pin that matches the hollow positioning post is fixedly installed on one side of the positioning plate. A positioning hole that matches the positioning rod is installed on the positioning plate.

[0011] Preferably, the assembly base is provided with a first slot adapted to the moving piece and a second slot adapted to the stationary piece.

[0012] Preferably, the second cover plate is provided with a third slot adapted to the moving plate and a fourth slot adapted to the stationary plate.

[0013] Preferably, the linkage plate has an assembly groove adapted to the spring, the spring has a second bent portion and a third bent portion that are engaged with the assembly groove, and the linkage plate has a notch adapted to the third bent portion.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model provides a small-volume three-phase magnetic latching relay. In view of the problem of unstable component fixation in the prior art, this utility model carefully sets multiple reinforcing ribs and matching fixing grooves in the load cavity, realizing the precise positioning and stable fixation of each component in multiple directions. This design greatly enhances the stability of the components under complex working conditions, effectively prevents loosening and displacement, ensures that the moving contact and the stationary contact always maintain good contact, significantly reduces the generation of electric arc and heat generation, greatly improves the reliability and durability of the relay, and effectively ensures the safe and stable operation of the circuit system.

[0016] 2. In addressing the issue of layout space, the load chamber and drive chamber are rationally positioned relative to each other, and the layout of key internal components such as contact assemblies, coil assemblies, armature assemblies, and linkage boards is optimized and highly integrated. This compact layout greatly reduces the overall size of the relay, enabling it to easily adapt to space-constrained devices such as small smart meters and compact industrial automation control modules. This effectively broadens the application areas, reduces design costs and complexity caused by space limitations, and improves the applicability and competitiveness of the product. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the internal structure of the load cavity of this utility model;

[0019] Figure 2 This is a utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a utility model Figure 1 Enlarged view of the structure at point B;

[0021] Figure 4 This is a three-dimensional structural view of the entire utility model;

[0022] Figure 5 This is a three-dimensional view of the internal structure of the drive cavity of this utility model;

[0023] Figure 6 This is a three-dimensional view of the assembly structure of the positioning plate and armature assembly in the drive cavity of this utility model;

[0024] Figure 7 This is a three-dimensional enlarged view of the positions of the reed, linkage plate, and stationary plate of this utility model;

[0025] Figure 8This is an exploded perspective view of the overall structure of this utility model;

[0026] Legend:

[0027] 1. Magnetic latching relay body; 101. Assembly base; 102. First cover plate; 103. Second cover plate; 1031. Third slot; 1032. Fourth slot; 2. Load cavity; 200. Fourth reinforcing rib; 3. Drive cavity; 4. Contact assembly; 401. Moving contact assembly; 4011. Moving contact; 40111. First bent portion; 4012. Spring; 40121. First positioning portion; 40122. Second bent portion; 40123. Third bent portion; 4013. Moving contact; 402. Stationary contact assembly; 4021. Stationary contact... 40211, Second positioning part; 4022, Stationary contact; 5, Coil assembly; 6, Armature assembly; 7, Linkage plate; 701, Assembly slot; 702, Notch; 8, First reinforcing rib; 9, Second reinforcing rib; 10, First fixing slot; 11, Third reinforcing rib; 111, Second fixing slot; 12, Third fixing slot; 13, Fourth fixing slot; 14, Positioning plate; 1401, Through hole; 1402, Positioning pin; 1403, Positioning hole; 15, Hollow positioning post; 16, Positioning rod; 17, First slot; 18, Second slot. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Specific implementation examples are given below.

[0030] Please see Figures 1-8The present invention discloses a small-volume three-phase magnetic latching relay, comprising a magnetic latching relay body 1 assembled from an assembly base 101, a first cover plate 102, and a second cover plate 103. The magnetic latching relay body 1 contains a load cavity 2 and a drive cavity 3 arranged opposite to each other. Three sets of contact assemblies 4 are equidistantly arranged within the load cavity 2. Each contact assembly 4 includes a moving plate assembly 401 and a stationary plate assembly 402 arranged opposite to each other. The moving plate assembly 401 includes a moving plate 4011, a spring 4012, and a moving contact 4013 disposed on the spring 4012. The stationary plate assembly 402 includes a stationary plate 4021 and a stationary contact 4022. An armature assembly 6 is rotatably mounted within the driving cavity 3. A coil assembly 5 for re-swinging the armature assembly 6 is also mounted within the driving cavity 3. A linkage plate 7 is movably disposed within the driving cavity 3 for linking the armature assembly 6 with the spring 4012 to achieve on / off switching. One end of the moving plate 4011 is provided with a first bent portion 40111. The load cavity 2 is provided with a first reinforcing rib 8, a second reinforcing rib 9, and a first fixing groove 10 adapted to the first bent portion 40111. During operation, when the coil... When component 5 is energized, it generates a magnetic field that causes armature component 6 to rotate. This rotation is transmitted to the reed 4012 via linkage plate 7, causing the moving contact component 401 to move relative to the stationary contact component 402. This allows the moving contact 4013 to contact or separate from the stationary contact 4022, thus controlling the circuit's on / off state. The first bent portion 40111 of the moving contact 4011 engages with the first fixing groove 10, serving to position and fix the moving contact 4011 during assembly. It also ensures that the moving contact 4011 does not loosen when fixed to the external circuitry. This is achieved through a reasonable setting of the negative... The carrier cavity 2 and the drive cavity 3 integrate key components such as the contact assembly 4, armature assembly 6, and coil assembly 5 into a compact magnetic latching relay body 1, achieving a small-volume design that is convenient for application in circuit systems with limited space and improves the applicability of the relay. The special structure of the moving piece 4011, in conjunction with the first reinforcing rib 8, the second reinforcing rib 9, and the first fixing groove 10, enhances the stability and reliability of the moving piece assembly 401 during frequent operation, reduces problems such as poor contact caused by the shaking or displacement deviation of the moving piece 4011, and extends the service life of the relay.

[0031] Furthermore, a first positioning part 40121 is fixedly provided on one side of the reed 4012, and a third reinforcing rib 11 is provided in the load cavity 2. A second fixing groove 111 adapted to the first positioning part 40121 is provided on one side of the third reinforcing rib 11. During operation, in the assembly process, the first positioning part 40121 of the reed 4012 is inserted into the second fixing groove 111 of the third reinforcing rib 11, realizing the precise positioning and fixing of the reed 4012. When the relay is working, this fixing method can effectively prevent the reed 4012 from shifting or shaking due to electromagnetic force or mechanical vibration. The moving contact 4012 ensures the connection stability between the reed 4012 and the moving contact 4011, thereby ensuring that the moving contact 4013 can accurately contact or separate from the stationary contact 4022. This improves the assembly accuracy of the reed 4012, reduces factors causing relay performance instability due to assembly errors, enhances the anti-interference capability of the reed 4012 during operation, and enables the relay to work reliably even in complex electromagnetic and mechanical vibration environments, reducing the failure rate and further improving the overall reliability and stability of the relay. This helps ensure the accuracy and continuity of three-phase circuit control.

[0032] Furthermore, a second positioning part 40211 is fixedly provided on one side of the stationary plate 4021, and a fourth reinforcing rib 200 is provided in the load cavity 2. A third fixing groove 12 adapted to the stationary plate 4021 and a fourth fixing groove 13 adapted to the second positioning part 40211 are provided on one side of the fourth reinforcing rib 200. During operation, the second positioning part 40211 of the stationary plate 4021 cooperates with the fourth fixing groove 13, and the main body of the stationary plate 4021 cooperates with the third fixing groove 12. During assembly, the stationary plate assembly 402 can be quickly and accurately installed in the designated position in the load cavity 2 and kept stable. Even if subjected to dynamic forces during the operation of the relay, it can withstand the impact. Even under the influence of impact forces generated by the movement of the plate assembly 401 or external vibrations, the stationary plate 4021 can still be firmly fixed in its original position, ensuring the accurate relative position of the stationary contact 4022 and the moving contact 4013, and guaranteeing the reliability of the circuit switching action. The precise positioning and firm fixation of the stationary plate assembly 402 improves the integrity and stability of the internal structure of the relay, helps to ensure the contact consistency and reliability of each phase contact in the three-phase circuit, reduces problems such as changes in contact resistance and arcing caused by the displacement of the stationary plate, thereby improving the control quality of the relay on the three-phase circuit, reducing power loss and the risk of damage to electrical equipment, and extending the service life of the entire circuit system.

[0033] Furthermore, the drive cavity 3 is equipped with a positioning plate 14 for assembling the armature assembly 6. The positioning plate 14 has a through hole 1401 adapted to the central axis of the armature assembly 6. A hollow positioning post 15 and a positioning rod 16 are fixedly installed in the drive cavity 3. A positioning pin 1402 adapted to the hollow positioning post 15 is fixedly installed on one side of the positioning plate 14. The positioning plate 14 has a positioning hole 1403 adapted to the positioning rod 16. During operation, when assembling the armature assembly 6, the positioning plate 14 is first installed in the drive cavity 3 by interlocking the positioning pin 1402 with the hollow positioning post 15 and the positioning hole 1403 with the positioning rod 16. Then, the central axis of the armature assembly 6 passes through the through hole 1401 of the positioning plate 14, realizing the precise positioning of the armature assembly 6 in the drive cavity 3. The rotating installation, during relay operation, allows the positioning plate 14, hollow positioning post 15, and positioning rod 16 to cooperate in restricting the axial displacement of the armature assembly 6, ensuring that the armature assembly 6 can only rotate stably around the central axis. This makes the movement of the armature assembly 6 under the influence of the magnetic field more precise and reliable, thereby accurately driving the linkage plate 7 to move. It provides a precise and stable assembly method for the armature assembly 6, improves the installation accuracy of the armature assembly 6, reduces the armature movement deviation caused by assembly errors, enhances the stability and reliability of the armature assembly 6 during operation, ensures that the electromagnetic drive part of the relay can accurately respond to the magnetic field changes of the coil assembly 5, stably control the on / off action of the contact assembly 4, and improve the overall accuracy and consistency of the relay's operation. It is suitable for application scenarios with high requirements for the control accuracy of three-phase circuits.

[0034] Furthermore, the assembly base 101 is provided with a first slot 17 adapted to the moving piece 4011 and a second slot 18 adapted to the stationary piece 4021, respectively. The second cover plate 103 is provided with a third slot 1031 adapted to the moving piece 4011 and a fourth slot 1032 adapted to the stationary piece 4021, respectively. During operation, when assembling the relay, the moving piece 4011 is inserted into the first slot 17 of the assembly base 101 and the third slot 1031 of the second cover plate 103, respectively, and the stationary piece 4021 is inserted into the second slot 18 of the assembly base 101 and the fourth slot 1032 of the second cover plate 103, respectively. Through the cooperation of these slots, the moving piece assembly 401 and the stationary piece assembly 402 are realized in the... The positioning and fixing within the magnetic latching relay body 1, during relay operation, the slot structure restricts the lateral displacement of the moving contact 4011 and the stationary contact 4021, ensuring the relative position stability of the moving contact 4013 and the stationary contact 4022, ensuring the reliability of circuit switching, simplifying the assembly process of the moving contact assembly 401 and the stationary contact assembly 402, improving assembly efficiency, and enhancing the stability of the moving contact 4011 and the stationary contact 4021 inside the relay through precise slot matching, reducing faults such as poor contact caused by loose or displaced components, improving the overall reliability and stability of the relay, facilitating large-scale manufacturing, reducing production costs, and ensuring the reliability and safety of three-phase circuit control.

[0035] Furthermore, the linkage plate 7 has an assembly groove 701 adapted to the spring 4012. The spring 4012 has a second bent portion 40122 and a third bent portion 40123 that engage with the assembly groove 701. The linkage plate 7 has a notch 702 adapted to the third bent portion 40123. During operation, during assembly, the second bent portion 40122 and the third bent portion 40123 of the spring 4012 engage with the assembly groove 701 and the notch 702 of the linkage plate 7, making the linkage plate 7 and the spring 4012 tightly connected. When the armature assembly 6 rotates, the linkage plate 7 moves accordingly. Through this connection structure, The linkage plate 7 can effectively transmit the motion of the armature assembly 6 to the reed 4012, thereby driving the moving plate assembly 401 to move and realize the on / off control of the moving contact 4013 and the stationary contact 4022. It establishes a stable and reliable linkage mechanism between the armature assembly 6 and the reed 4012, ensuring the accuracy and efficiency of motion transmission, reducing energy loss and action delay caused by gaps or looseness between linkage components, improving the response speed and action sensitivity of the relay, enabling the relay to quickly and accurately control the on / off of the three-phase circuit, and is suitable for occasions with high requirements for circuit control response speed. At the same time, it improves the overall mechanical performance and reliability of the relay.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A small-volume three-phase magnetic latching relay, characterized in that: The magnetic latching relay body (1) is assembled from an assembly base (101), a first cover plate (102), and a second cover plate (103). The magnetic latching relay body (1) contains a load cavity (2) and a drive cavity (3) arranged opposite to each other. Three sets of contact assemblies (4) are equidistantly assembled within the load cavity (2). Each contact assembly (4) includes a moving plate assembly (401) and a stationary plate assembly (402) arranged opposite to each other. The moving plate assembly (401) includes a moving plate (4011) and a spring. The reed (4012) and the moving contact (4013) provided on the reed (4012) are included. The stationary plate assembly (402) includes a stationary plate (4021) and a stationary contact (4022). An armature assembly (6) is rotatably assembled in the drive cavity (3). A coil assembly (5) for making the armature assembly (6) swing back and forth is assembled in the drive cavity (3). A linkage plate (7) for making the armature assembly (6) and the reed (4012) move together to achieve on and off.

2. The small-volume three-phase magnetic latching relay according to claim 1, characterized in that: One end of the moving piece (4011) is provided with a first bending portion (40111), and the load cavity (2) is provided with a first reinforcing rib (8), a second reinforcing rib (9), and a first fixing groove (10) adapted to the first bending portion (40111).

3. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: A first positioning part (40121) is fixedly provided on one side of the spring (4012), a third reinforcing rib (11) is provided in the load cavity (2), and a second fixing groove (111) adapted to the first positioning part (40121) is provided on one side of the third reinforcing rib (11).

4. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: A second positioning part (40211) is fixedly provided on one side of the stationary plate (4021), a fourth reinforcing rib (200) is provided in the load cavity (2), a third fixing groove (12) adapted to the stationary plate (4021) is provided on one side of the fourth reinforcing rib (200), and a fourth fixing groove (13) adapted to the second positioning part (40211).

5. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: The drive cavity (3) is equipped with a positioning plate (14) for assembling the armature assembly (6). The positioning plate (14) has a through hole (1401) adapted to the central axis of the armature assembly (6). A hollow positioning post (15) and a positioning rod (16) are fixedly installed in the drive cavity (3). A positioning pin (1402) adapted to the hollow positioning post (15) is fixedly installed on one side of the positioning plate (14). A positioning hole (1403) adapted to the positioning rod (16) is opened on the positioning plate (14).

6. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: The assembly base (101) is provided with a first slot (17) adapted to the moving piece (4011) and a second slot (18) adapted to the stationary piece (4021).

7. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: The second cover plate (103) is provided with a third slot (1031) adapted to the moving piece (4011) and a fourth slot (1032) adapted to the stationary piece (4021).

8. A small-volume three-phase magnetic latching relay according to claim 1, characterized in that: The linkage plate (7) is provided with an assembly groove (701) that matches the spring (4012). The spring (4012) is provided with a second bent part (40122) and a third bent part (40123) that are engaged with the assembly groove (701). The linkage plate (7) is provided with a notch (702) that matches the third bent part (40123).

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