Arrangement mechanism of small volume large pitch magnetic latching relay

Abstract

This invention relates to the field of relay technology and discloses an arrangement mechanism for a small-volume, large-pitch magnetic latching relay. The mechanism includes a mounting base, the internal cavity of which is divided along a first direction into independent driving and contact areas. An electromagnetic drive assembly is integrally disposed within the driving area, and a contact assembly is integrally disposed within the contact area. A push rod extends along the first direction, one end of which is drively connected to the electromagnetic drive assembly, and the other end is elastically connected to a moving spring unit. The moving spring unit includes independent first and second moving spring assemblies, which are electrically connected via a flexible conductive connector. This invention, through its split moving spring structure, completely breaks through the material and mechanical limitations of traditional integrated moving springs. Without increasing the overall size of the relay, the contact pitch is increased to over 5.5mm, significantly improving electrical breakdown strength and reliability. It is suitable for applications such as smart meters and reactive power compensation devices.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to an arrangement mechanism for a small-volume, large-pitch magnetic latching relay. Background Technology

[0002] Magnetic latching relays, with their advantages of low power consumption and high reliability, are widely used in smart meters, reactive power compensation devices, and industrial automation control. With the trend towards miniaturization and integration of electronic devices, the market has increasingly stringent requirements for the size of magnetic latching relays, while simultaneously raising the bar for their electrical safety performance. However, existing traditional magnetic latching relays generally adopt an integrated moving spring structure. The moving spring must simultaneously bear three major functions: high-current conduction, elastic transmission, and contact pressure provision. This forced coupling design faces insurmountable material mechanics bottlenecks. The maximum allowable fatigue strain of the beryllium bronze moving spring commonly used in relays is approximately 0.3%. Due to this limitation, the maximum contact stroke of traditional integrated moving springs can only reach about 1 mm. If the contact spacing is forcibly increased, the moving spring will experience fatigue fracture due to bending strain exceeding the limit, severely affecting the relay's service life and reliability.

[0003] Furthermore, traditional magnetic latching relays typically employ a stacked layout of the electromagnetic system and contact system, resulting in a large vertical dimension and insufficient utilization of lateral space, further limiting the potential for increasing contact spacing. To meet basic insulation requirements within a limited volume, current technologies can only compensate by increasing the thickness of the insulation material or using complex insulation structures. This not only increases production costs and assembly difficulty but also fails to fundamentally resolve the contradiction between small size and high electrical breakdown strength. In high-voltage, high-current applications, the small contact spacing of traditional relays easily leads to electrical breakdown, creepage, and other failures, posing serious safety hazards and failing to meet increasingly stringent usage requirements.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of this invention is to propose an arrangement mechanism for a small-volume, large-pitch magnetic latching relay, in order to solve the technical problems of the existing technology, such as the small spacing of the integrated moving spring contacts being limited by material mechanics, the difficulty in balancing small volume and high electrical breakdown strength, and the existence of breakdown safety hazards.

[0006] Therefore, this invention proposes an arrangement mechanism for a small-volume, large-pitch magnetic latching relay.

[0007] Preferably, the present invention may also have the following technical features:

[0008] An arrangement mechanism for a small-volume, large-pitch magnetic latching relay includes a mounting base, and an electromagnetic drive assembly, a push rod, and a contact assembly disposed on the mounting base. The electromagnetic drive assembly drives the push rod to move, thereby driving the contact assembly to realize the switching of the circuit. The internal cavity of the mounting base is divided into an independent drive area and a contact area along a first direction.

[0009] The electromagnetic drive assembly is integrally disposed within the drive area;

[0010] The contact assembly is integrally disposed within the contact area, and the contact assembly includes a stationary spring unit and a moving spring unit;

[0011] The push rod extends along the first direction, with one end extending into the driving area and being connected to the electromagnetic drive assembly, and the other end extending into the contact area and being elastically connected to the moving spring unit.

[0012] The moving spring unit includes a first moving spring assembly and a second moving spring assembly that are independent of each other. The first moving spring assembly is elastically connected to the end of the push rod. The first moving spring assembly is provided with at least one moving contact. The second moving spring assembly is fixedly disposed in the contact area. The second moving spring assembly is provided with a moving spring sheet for providing the initial closing force.

[0013] The first moving spring assembly and the second moving spring assembly are electrically connected by a flexible conductive connector.

[0014] Preferably, the flexible conductive connector is a copper braided wire, which is arranged in a U-shape and its two ends are welded to the first side arm of the first moving spring assembly and the second moving spring assembly, respectively.

[0015] Preferably, the electromagnetic drive assembly includes a coil assembly and a magnet assembly. The magnet assembly can reciprocate around a fixed rotating shaft. A drive pin is fixedly provided on the magnet assembly. The drive pin is vertically inserted into the oblong hole at the end of the push rod to convert the oscillating motion of the magnet assembly into the linear motion of the push rod along the first direction.

[0016] Preferably, the magnet assembly is disposed below the coil assembly, or the magnet assembly is disposed above the coil assembly.

[0017] Preferably, the end of the push rod is integrally formed with a hollow frame type mounting base, the second side arm of the first moving spring assembly extends into the hollow area of ​​the mounting base, the lower part of the first moving spring assembly is provided with a relief groove extending along the first direction, the mounting base passes through the relief groove, a spring is provided in the hollow area of ​​the mounting base, the two ends of the spring abut against the inner wall of the first moving spring assembly and the mounting base respectively, so as to realize the elastic connection between the first moving spring assembly and the push rod.

[0018] Preferably, a guide structure is provided between the first moving spring assembly and the mounting base, the guide structure being used to restrict the first moving spring assembly to slide back and forth only along the first direction.

[0019] Preferably, the guide structure includes at least two guide recesses disposed on the second side arm of the first moving spring assembly, and at least two guide protrusions disposed on the inner wall of the hollow area of ​​the mounting base, wherein the guide protrusions slide in cooperation with the guide recesses.

[0020] Preferably, after the push rod drives the first moving spring assembly to contact the stationary contact of the stationary spring unit, the push rod can continue to move an overtravel of 0.5-1mm along the first direction to further compress the spring and provide contact pressure.

[0021] Preferably, the mounting base is integrally formed with multiple insulating ribs, the insulating ribs including a main rib separating the driving area and the contact area, and multiple partition ribs disposed in the contact area, the partition ribs separating the stationary spring unit, the second moving spring assembly and the moving spring sheet from each other.

[0022] Preferably, the maximum disconnection distance between the moving contact and the stationary contact on the stationary spring unit is greater than or equal to 5.5 mm.

[0023] The beneficial effects of this invention compared to the prior art include:

[0024] 1. This invention adopts a structure combining a transverse compartmentalized layout with a split-type moving spring structure. The interior of the mounting base is divided into independent driving and contact areas. At the same time, the traditional integrated moving spring is split into independent first and second moving spring assemblies and electrically connected by a flexible conductive connector. This completely breaks through the contact spacing ceiling of the traditional integrated moving spring, which is limited by material fatigue deformation, and achieves decoupling of transmission and conduction functions. It makes full use of the space in the width direction of the relay, and significantly increases the contact disconnection distance without increasing the overall size. This fundamentally solves the inherent contradiction between small size and high electrical breakdown strength, and significantly improves the safety and reliability of the relay.

[0025] 2. This invention uses a U-shaped copper braided wire as a flexible conductive connector, with both ends connected to the moving spring assembly by welding. This ensures the reliability of high current transmission and low contact resistance, while also possessing excellent bending fatigue performance. It can easily adapt to large-stroke reciprocating motion without breaking, effectively extending the service life of the relay.

[0026] 3. This invention adopts a crank-slider transmission structure with a magnetic steel component swinging and a drive pin and an oblong hole. It can smoothly convert the swinging motion of the magnetic steel into the linear motion of the push rod. The oblong hole can automatically absorb the vertical component of the arc motion of the drive pin, avoiding motion interference and jamming. It has high transmission efficiency and a simple and reliable structure.

[0027] 4. This invention adopts a hollow frame mounting base with an elastic connection structure with an internal spring. The mounting base and the first moving spring assembly are matched through a clearance groove. The structure is compact and easy to assemble. The spring can provide stable contact pressure and realize overtravel compensation function, effectively offsetting the wear caused by long-term use of the contact and ensuring long-term stability of contact performance.

[0028] 5. The present invention provides a guide structure between the first moving spring assembly and the mounting base, which can strictly limit the movement direction of the first moving spring assembly, ensure the straightness and stability of its movement, avoid swaying and shaking, ensure that the moving contact and the stationary contact can be accurately aligned, and improve the contact reliability.

[0029] 6. The present invention adopts a guide structure in which the guide recess and guide protrusion cooperate, which has a simple processing technology, high guiding accuracy, low frictional resistance, and does not consume additional electromagnetic driving force; the symmetrically arranged double guide structure can also effectively prevent the first moving spring assembly from twisting, further improving the smoothness of movement. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention. Figure 1 .

[0031] Figure 2 This is a structural schematic diagram of a specific embodiment of the present invention. Figure 2 .

[0032] Figure 3 This is a structural schematic diagram of a specific embodiment of the present invention. Figure 3 .

[0033] Figure 4 This is the present invention. Figure 3 Enlarged diagram of point A in the middle.

[0034] Figure 5 This is a structural schematic diagram of a specific embodiment of the present invention. Figure 4 .

[0035] Explanation of reference numerals in the attached drawings: 100-Contact area; 200-Driving area; 1-Flexible conductive connector; 2-Mounting base; 3-First moving spring assembly; 31-First side arm; 32-Second side arm; 33-Relief groove; 34-Guide recess; 4-Static contact; 5-Spring; 6-Moving contact; 7-Static spring seat; 8-Moving spring; 9-Magnet fixing frame; 10-Magnet assembly; 11-Coil assembly; 12-Push rod; 121-Oval hole; 122-Mounting base; 123-Hollow area; 124-Guide protrusion; 13-Second moving spring assembly; 14-Fixed shaft; 15-Driving pin. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0037] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0038] The arrangement mechanism of the small-volume, large-pitch magnetic latching relay provided in this embodiment is mainly used in fields with high electrical safety requirements, such as smart meters, reactive power compensation devices, and intelligent control equipment. This mechanism, through a combination of a split-type moving spring structure, a lateral compartmentalized layout, and flexible conductive connections, increases the contact break distance from the traditional approximately 1mm to over 5.5mm without increasing the overall size of the relay, significantly improving electrical breakdown strength and operational safety.

[0039] like Figures 1-5 As shown, the arrangement mechanism of the small-volume, large-pitch magnetic latching relay in this embodiment includes a mounting base 2, and an electromagnetic drive assembly, a push rod 12, and a contact assembly disposed on the mounting base 2. The electromagnetic drive assembly is used to drive the push rod 12 to move, thereby driving the contact assembly to realize the switching on and off of the circuit.

[0040] The internal cavity of the mounting base 2 is along the first direction (e.g.) Figure 1 As shown in the diagram, the relay is divided into an independent drive area 200 and a contact area 100, with the drive area on the right and the contact area on the left. The electromagnetic drive assembly is entirely disposed within the drive area 200, and the contact assembly is entirely disposed within the contact area 100. This horizontally compartmentalized layout changes the traditional stacked electromagnetic and contact systems of relays to a side-by-side arrangement, making full use of the space in the width direction of the relay and avoiding waste of vertical dimensions. This allows for a large contact spacing while maintaining the same overall dimensions as traditional products of the same specifications.

[0041] The push rod 12 extends along the first direction, with one end extending into the drive area 200 and being connected to the electromagnetic drive assembly, and the other end extending into the contact area 100 and being elastically connected to the moving spring unit. The push rod 12 has the shortest transmission path across the two functional areas, the highest transmission efficiency, and also simplifies the overall structure and reduces assembly difficulty.

[0042] The contact assembly includes a stationary spring unit and a moving spring unit. The moving spring unit includes a first moving spring assembly 3 and a second moving spring assembly 13, which are independent of each other. The first moving spring assembly 3 is elastically connected to the end of the push rod 12 and has at least one moving contact 6. The second moving spring assembly 13 is fixedly disposed within the contact area 100 and has a moving spring sheet 8 for providing the initial closing force. The first moving spring assembly 3 and the second moving spring assembly 13 are electrically connected by a flexible conductive connector 1. The moving spring sheet 8 is an elastic metal sheet, such as beryllium copper, with one end fixed to the second moving spring assembly 13 and the other end freely extending into the movement path of the first moving spring assembly 3, without participating in any current transmission process. The stationary spring unit includes a stationary spring seat 7 and a stationary contact 4. The stationary spring seat 7 is fixedly disposed within the contact area 100 near the first moving spring assembly 3, and the stationary contact 4 is riveted to the end face of the stationary spring seat 7 facing the first moving spring assembly 3, and is coaxially opposite to the moving contact 6.

[0043] This split-type moving spring structure completely decouples the three major functions of traditional integrated moving springs: conductivity, transmission, and elastic support. The first moving spring assembly 3 only undertakes the functions of bearing the moving contact 6 and rigid transmission, the second moving spring assembly 13 only undertakes the functions of fixed support and external conductive lead-out, the moving spring only undertakes the independent function of providing the initial closing force, and the flexible conductive connector 1 only undertakes the function of large current transmission. This breaks the ceiling of contact spacing in traditional integrated moving springs that is limited by material fatigue deformation, so that the contact spacing is determined only by the output stroke of the electromagnetic drive system.

[0044] In some examples of this embodiment, such as Figures 1-3 As shown, the flexible conductive connector 1 is a copper braided wire arranged in a U-shape, with its two ends welded to the first side arm 31 of the first moving spring assembly 3 and the second moving spring assembly 13, respectively. The copper braided wire is woven from multiple strands of fine copper wire, possessing excellent flexibility and bending performance, easily adapting to large-stroke reciprocating motions exceeding 5.5mm without fatigue fracture. The U-shaped arrangement further increases the bending allowance of the copper braided wire, reducing stress during movement and extending its service life. Simultaneously, the copper braided wire exhibits excellent conductivity and low contact resistance, meeting the requirements for high-current transmission, and the welded connection method is robust and reliable, avoiding loosening and poor contact issues.

[0045] In some examples of this embodiment, such as Figures 1-3 As shown, the electromagnetic drive assembly includes a coil assembly 11 and a magnet assembly 10. The magnet assembly 10 can reciprocate around a fixed rotating shaft 14. The lower end of the fixed rotating shaft 14 is located at the top of the magnet assembly 10 (away from the inner bottom wall of the mounting base 2), and the upper end of the fixed rotating shaft 14 is rotatably mounted on a magnet fixing frame 9. The magnet fixing frame 9 is fixedly mounted on the mounting base 2 within the drive area 200. A drive pin 15 is fixedly mounted on the magnet assembly 10. The drive pin 15 is vertically inserted into the oblong hole 121 at the end of the push rod 12 to convert the oscillating motion of the magnet assembly 10 into the linear motion of the push rod 12 along the first direction. This crank-slider type transmission structure is simple, reliable, and has high transmission efficiency. The oblong hole 121 can absorb the vertical component in the arc motion of the drive pin 15, transmitting only the horizontal driving force, thus avoiding motion interference and jamming.

[0046] In other examples of this embodiment, such as Figures 1-3 As shown, the magnet assembly 10 is disposed below the coil assembly 11, as... Figure 5 As shown, the magnet assembly 10 is positioned above the coil assembly 11. When the magnet assembly 10 is positioned below the coil assembly 11, the coupling area between the magnet and the coil is larger, the electromagnetic attraction is stronger, and the coil power consumption is lower, effectively reducing the relay's energy consumption. When the magnet assembly 10 is positioned above the coil assembly 11, the assembly process is simpler, facilitating automated production. It also makes it easier to adjust the air gap parameters between the magnet and the iron core, optimizing electromagnetic performance. Both arrangements can be flexibly selected according to different production processes and performance requirements, improving product adaptability.

[0047] In some examples of this embodiment, such as Figures 1-3As shown, a hollow frame mounting base 122 is integrally formed at the end of the push rod 12. The second side arm 32 of the first moving spring assembly 3 extends into the hollow area 123 of the mounting base 122. A clearance groove 33 extending along the first direction is provided at the lower part of the first moving spring assembly 3. The mounting base 122 passes through the clearance groove 33. A spring 5 is provided in the hollow area 123 of the mounting base 122. The two ends of the spring 5 abut against the inner walls of the first moving spring assembly 3 and the mounting base 122, respectively, to achieve an elastic connection between the first moving spring assembly 3 and the push rod 12. The above-mentioned elastic connection structure provides the contact pressure required for contact closure, ensuring that the contacts will not overheat and burn when a large current passes through; it realizes the overtravel function. After the contacts are in contact, the push rod 12 can continue to move a small distance to further compress the spring 5. Even if the contacts wear during use, sufficient contact pressure can be guaranteed, extending the service life of the relay.

[0048] Furthermore, a guide structure is provided between the first moving spring assembly 3 and the mounting base 122. The guide structure restricts the first moving spring assembly 3 to slide back and forth only along the first direction. The guide structure can ensure the straightness and stability of the movement of the first moving spring assembly 3, and prevent it from swaying and shaking during movement, thereby ensuring that the moving contact 6 and the stationary contact 4 can be accurately aligned and improving contact reliability.

[0049] In some examples of this embodiment, such as Figures 1-4 As shown, the guide structure includes at least two guide recesses 34 disposed on the second side arm 32 of the first moving spring assembly 3, and at least two guide protrusions 124 correspondingly disposed on the inner wall of the hollow region 123 of the mounting base 122. The guide protrusions 124 are slidably engaged with the guide recesses 34. This concave-convex engagement guide structure is simple and compact, easy to manufacture, has high guiding accuracy, and low frictional resistance, thus avoiding excessive consumption of the output force of the electromagnetic drive system. Simultaneously, the symmetrical arrangement of the two guide recesses 34 and the guide protrusions 124 effectively prevents the first moving spring assembly 3 from twisting, further improving the stability of the movement.

[0050] Furthermore, after the push rod 12 drives the first moving spring assembly 3 to contact the stationary contact 4 of the stationary spring unit, the push rod 12 can continue to move 0.5-1mm overtravel along the first direction to further compress the spring 5 and provide contact pressure. The 0.5-1mm overtravel is the optimal range verified through extensive experiments, ensuring sufficient contact pressure without over-compressing the spring 5 and causing fatigue failure. This overtravel allows the relay to maintain good contact performance even with some wear on the contacts during long-term use, significantly improving product reliability and service life.

[0051] In some examples of this embodiment, the mounting base 2 is integrally formed with multiple insulating ribs. These insulating ribs include a main rib separating the driving area 200 and the contact area 100, and multiple partition ribs disposed within the contact area 100. The partition ribs space the stationary spring unit, the second moving spring assembly 13, and the moving spring 8 apart. The main rib not only separates the two functional areas but also effectively blocks electromagnetic interference generated by the electromagnetic drive assembly, improving the electromagnetic compatibility of the relay. The partition ribs physically isolate each energized component, and together with an air contact spacing of 5.5mm or more, form a multi-layered insulation protection system, significantly improving the electrical breakdown strength of the relay and reducing the risk of creepage and breakdown failure.

[0052] In some examples of this embodiment, the maximum disconnection distance between the moving contact 6 and the stationary contact 4 on the stationary spring unit is greater than or equal to 5.5 mm. Because this invention employs a split-type moving spring structure, the contact stroke is no longer limited by the elastic deformation of the moving spring 8, but is determined solely by the output stroke of the electromagnetic drive system. Based on the basic geometric principles of the crank-slider mechanism, the formula for calculating the maximum horizontal stroke of the push rod 12 is: Where R is the lever arm length from the rotating shaft of the magnet assembly 10 to the drive pin 15, and α is the maximum swing angle of the magnet assembly 10. In this embodiment, by reasonably designing the swing angle of the magnet assembly 10 to be 25° and the lever arm length of the drive pin 15 to be 12.5mm, the maximum horizontal stroke of the push rod 12 can be calculated to be approximately 5.4mm, thus achieving a maximum disconnection distance of greater than or equal to 5.5mm between the moving contact 6 and the stationary contact 4. In the traditional integrated moving spring structure magnetic latching relay, the moving spring 8 simultaneously undertakes the functions of conductivity and elastic transmission. Due to the limitation of the fatigue strain limit of beryllium bronze material (approximately 0.3%), the maximum allowable bending angle of the moving spring 8 is only about 5.7°, corresponding to a maximum contact stroke of only about 1mm. Compared with the traditional structure, the contact spacing of the present invention is increased by more than 500%, and the electrical breakdown strength is exponentially improved, which can meet the requirements of higher voltage levels and more stringent operating environments.

[0053] Optionally, the first moving spring assembly 3 is provided with two moving contacts 6, and the stationary spring unit is provided with two corresponding stationary contacts 4, forming a double-contact switching structure. The double-contact structure can effectively improve the current carrying capacity of the relay, reduce the contact resistance, and also improve the reliability of the contact. Even if one contact fails to make contact, the other contact can still ensure the normal conduction of the circuit.

[0054] The working principle of the small-volume, large-pitch magnetic latching relay in this embodiment is as follows:

[0055] When initially in the open state, the magnet assembly 10 is attracted to the first extreme position by the attraction of the permanent magnet. At this time, the push rod 12 is at the extreme position away from the stationary contact 4, the stepped surface of the mounting base 122 abuts against the coil side end face of the first moving spring assembly 3, and the spring 5 is in a pre-compressed state. Under the constraint of the guide structure, the first moving spring assembly 3 is located at the extreme position away from the stationary contact in the contact area 100, the moving contact 6 is completely separated from the stationary contact 4, and the maximum disconnection distance between them is greater than or equal to 5.5 mm, and the circuit is in the open state. The copper braided wire is in a natural U-shaped bend.

[0056] When the circuit needs to be closed, a positive instantaneous pulse current is applied to the coil assembly 11. The coil generates a magnetic field, which interacts with the magnetic field of the permanent magnet itself, producing a torque that pushes the magnet assembly 10 to swing around the fixed axis 14 towards the second extreme position. The drive pin 15, fixed to the free end of the magnet assembly 10, follows suit, making an arc motion. The drive pin 15 is inserted into the oblong hole 121 at the end of the push rod 12, converting the swinging motion of the magnet assembly 10 into a linear motion of the push rod 12 along the first direction towards the stationary contact 4. In the initial stage when the push rod 12 drives the first moving spring assembly 3 to move towards the stationary contact 4, the free end of the moving spring 8 first contacts the first moving spring assembly 3 and undergoes elastic deformation, providing an initial thrust to the first moving spring assembly 3. This helps overcome the static friction in the initial stage of movement, preventing start-up jamming and ensuring the smoothness and consistency of the relay closing action. The push rod 12 moves the hollow frame mounting base 122 towards the stationary contact 4. The stepped surface of the mounting base 122 leaves the coil-side end face of the first moving spring assembly 3, and begins to compress the spring 5. When the spring 5 is compressed to a certain extent, its elastic force is greater than the static friction force of the first moving spring assembly 3. The spring 5 pushes the first moving spring assembly 3 to slide along the guide structure towards the stationary contact 4. Until the moving contact 6 contacts the stationary contact 4, the first moving spring assembly 3 stops moving. At this time, the push rod 12 continues to move 0.5-1mm overtravel towards the stationary contact 4, and the spring 5 is further compressed, generating sufficient contact pressure to ensure reliable conduction of large current. After the coil is de-energized, the magnet assembly 10 is attracted by the permanent magnet to the second limit position, and the relay remains closed. The current path is: stationary contact 4 → moving contact 6 → first moving spring assembly 3 → copper braided wire → second moving spring assembly 13 → external circuit.

[0057] When the circuit needs to be disconnected, a reverse instantaneous pulse current is applied to the coil assembly 11. The coil generates a reverse magnetic field, pushing the magnet assembly 10 to swing around the fixed shaft 14 to the first extreme position. The drive pin 15 drives the push rod 12 to move linearly towards the coil side in the first direction. The mounting base 122 moves towards the coil side accordingly, and the spring 5 begins to release its elastic force, pushing the first moving spring assembly 3 to slide rapidly towards the coil side. The moving contact 6 and the stationary contact 4 separate instantaneously, achieving rapid disconnection and effectively preventing arc erosion of the contacts. When the stepped surface of the mounting base 122 presses against the coil side end face of the first moving spring assembly 3 again, the push rod 12 rigidly drives the first moving spring assembly 3 to slide towards the coil side together. Until the magnet assembly 10 returns to the first extreme position, all components return to the initial disconnected state, and the relay remains in the disconnected state.

[0058] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0059] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A small volume large gap magnetic latching relay arrangement comprising a mounting base, and an electromagnetic drive assembly, a push rod and a contact assembly disposed on the mounting base, the electromagnetic drive assembly being arranged to drive movement of the push rod which in turn causes the contact assembly to open and close an electrical circuit; characterised in that, The internal cavity of the mounting base is divided into an independent driving area and a contact area along the first direction; The electromagnetic drive assembly is integrally disposed within the drive area; The contact assembly is integrally disposed within the contact area, and the contact assembly includes a stationary spring unit and a moving spring unit; The push rod extends along the first direction, with one end extending into the driving area and being connected to the electromagnetic drive assembly, and the other end extending into the contact area and being elastically connected to the moving spring unit. The moving spring unit includes a first moving spring assembly and a second moving spring assembly that are independent of each other. The first moving spring assembly is elastically connected to the end of the push rod. The first moving spring assembly is provided with at least one moving contact. The second moving spring assembly is fixedly disposed in the contact area. The second moving spring assembly is provided with a moving spring sheet for providing the initial closing force. The first moving spring assembly and the second moving spring assembly are electrically connected by a flexible conductive connector.

2. The arrangement mechanism of a small volume large gap magnetic latching relay according to claim 1, characterized by, The flexible conductive connector is a copper braided wire, which is arranged in a U-shape, and its two ends are welded to the first side arm of the first moving spring assembly and the second moving spring assembly, respectively.

3. The arrangement mechanism of a small volume large gap magnetic latching relay according to claim 1, characterized by, The electromagnetic drive assembly includes a coil assembly and a magnet assembly. The magnet assembly can reciprocate around a fixed axis. A drive pin is fixedly provided on the magnet assembly. The drive pin is vertically inserted into the waist-shaped hole at the end of the push rod to convert the oscillating motion of the magnet assembly into the linear motion of the push rod along the first direction.

4. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 3, characterized in that, The magnet assembly is disposed below the coil assembly, or the magnet assembly is disposed above the coil assembly.

5. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 1, characterized in that, The end of the push rod is integrally formed with a hollow frame type mounting base. The second side arm of the first moving spring assembly extends into the hollow area of ​​the mounting base. The lower part of the first moving spring assembly is provided with a relief groove extending along the first direction. The mounting base passes through the relief groove. A spring is provided in the hollow area of ​​the mounting base. The two ends of the spring abut against the inner wall of the first moving spring assembly and the mounting base, respectively, so as to realize the elastic connection between the first moving spring assembly and the push rod.

6. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 5, characterized in that, A guide structure is provided between the first moving spring assembly and the mounting base, the guide structure being used to restrict the first moving spring assembly to slide back and forth only along the first direction.

7. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 6, characterized in that, The guide structure includes at least two guide recesses disposed on the second side arm of the first moving spring assembly, and at least two guide protrusions disposed on the inner wall of the hollow area of ​​the mounting base, wherein the guide protrusions slide in cooperation with the guide recesses.

8. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 5, characterized in that, After the push rod drives the first moving spring assembly to contact the stationary contact of the stationary spring unit, the push rod can continue to move an overtravel of 0.5-1mm along the first direction to further compress the spring and provide contact pressure.

9. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 1, characterized in that, The mounting base is integrally formed with multiple insulating ribs, including a main rib separating the driving area and the contact area, and multiple partition ribs disposed in the contact area. The partition ribs separate the stationary spring unit, the second moving spring assembly and the moving spring sheet from each other.

10. The arrangement mechanism of the small-volume, large-pitch magnetic latching relay according to claim 1, characterized in that, The maximum disconnection distance between the moving contact and the stationary contact on the stationary spring unit is greater than or equal to 5.5 mm.

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