Moving contact structure and direct-acting relay

Abstract

This application discloses a moving contact structure and a direct-acting relay, relating to the field of relay technology. The moving contact structure includes a conductive bridge, a push rod, a first elastic part, and a second elastic part. The conductive bridge has two moving contacts. One end of the push rod is stacked with the first and second elastic parts. The first elastic part includes an intermediate plate and two deformable arms, which are respectively located on both sides of the intermediate plate and are arranged at an angle. The second elastic part is configured to elastically abut against a mating structure on the relay housing during the retraction of the moving contact structure. The push rod is movably connected to the conductive bridge, and the conductive bridge at the end of the two deformable arms away from the intermediate plate elastically abuts against the push rod. In the technical solution provided by the embodiments of this application, the first elastic part can provide the pressure for the contact between the moving and stationary contacts, ensuring reliable and stable contact. The second elastic part can provide the thrust for the next engagement of the moving and stationary contacts, thereby effectively adjusting the relay's pull-in voltage.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a moving contact structure and a direct-acting relay. Background Technology

[0002] A direct-acting relay is an electromagnetic relay whose core feature is that the moving contact structure achieves contact closure and opening through linear motion, rather than through traditional rotation or lever mechanisms. This design gives direct-acting relays advantages such as large stroke, high magnetic holding force, high transmission efficiency, and compact structure. They are particularly suitable for applications with large contact gaps and high space requirements, such as in the electricity meter industry and in new energy applications like photovoltaic inverters, energy storage systems, and charging piles. The direct-acting relay uses the electromagnetic force generated by the electromagnetic system to drive the armature to move linearly, thereby causing the moving contact to contact or separate from the stationary contact, achieving the circuit's control function.

[0003] Traditional direct-acting relays have asymmetrical or independent contact springs and reset springs, which have the following problems: the driving force and reset force are offset in direction, the conductive bridge is prone to tilting or jamming; the stress distribution of the springs is uneven, resulting in poor mechanical life; the contact pressure fluctuates greatly, and the contact resistance is unstable, which easily leads to arcing and erosion. Utility Model Content

[0004] This application proposes a moving contact structure and a direct-acting relay, aiming to provide a moving contact structure that can provide stable and reliable contact pressure between the moving and stationary contacts and reduce the electromagnetic force required for contact closure.

[0005] One embodiment of this application proposes a moving contact structure applied to a direct-acting relay, comprising: A conductive bridge, wherein the conductive bridge is provided with two moving contacts; A push rod, one end of which is provided with a first elastic part and a second elastic part. The first elastic part includes an intermediate plate and two deformation arms. The two deformation arms are respectively disposed on both sides of the intermediate plate and are arranged at an included angle. The second elastic part is configured to elastically abut against the mating structure on the relay housing during the retraction of the moving contact structure. The push rod is movably connected to the conductive bridge, and the conductive bridge elastically abuts against the push rod at the end of the two deformable arms away from the intermediate plate.

[0006] In one embodiment, the dynamic contact structure further includes a connecting component, which includes a mounting bracket. The mounting bracket includes two vertical plates and a horizontal plate connecting the two vertical plates. The horizontal plate is connected to the push rod and is stacked with the first elastic part and the second elastic part. The ends of the two vertical plates away from the horizontal plate are both connected to the conductive bridge.

[0007] In one embodiment, the connecting assembly further includes a stop block disposed on the side of the conductive bridge facing away from the push rod, and the two vertical plates have a plug-in portion at the end away from the horizontal plate, and the two plug-in portions are plugged into the stop block.

[0008] In one embodiment, the push rod has a push plate at one end near the conductive bridge, and the push plate has at least one fixing post facing the conductive bridge; The second elastic part is provided with at least one first mounting hole, the intermediate plate is provided with at least one second mounting hole, and each of the fixing posts is sequentially inserted through a second mounting hole and a first mounting hole.

[0009] In one embodiment, the dynamic contact structure includes two conductive bridges, which are arranged side by side and spaced apart. The dynamic contact structure further includes a connecting piece, through which the two conductive bridges are connected. The connecting piece is located on the side of the conductive bridge facing the first elastic part.

[0010] One embodiment of this application also proposes a direct-acting relay, comprising: A housing having a receiving cavity, wherein at least two stationary contacts are provided inside the housing, and a portion of the structure of at least two of the stationary contacts extends outside the housing; In the moving contact structure described above, each of the moving contacts is provided in correspondence with a stationary contact; The drive mechanism has a push rod connected to the drive end of the drive mechanism, and the drive end can drive the moving contact to abut or disengage from the stationary contact.

[0011] In one embodiment, the housing further includes a partition that divides the receiving cavity into a first cavity and a second cavity, the driving mechanism being disposed in the first cavity, and the dynamic contact structure and at least two of the stationary contacts being disposed in the second cavity; The second elastic part can elastically abut or detach from the cavity or the cavity fixing part.

[0012] In one embodiment, the second cavity is provided with two limiting blocks facing the partition, and the two limiting blocks and the shell enclose to form a limiting groove; The conductive bridge has a stop block on the side facing away from the push rod, and the stop block is limited to the limiting groove.

[0013] In one embodiment, the drive mechanism includes: A yoke is provided in the accommodating cavity; A coil frame is provided on the yoke, and a winding is wound around the outer periphery of the coil frame, forming a movement channel; An armature is movably disposed in the motion channel, and one end of the armature is connected to the push rod; The magnetic guide plate has a magnet on the side facing away from the coil frame, and the magnet is located on one or both sides or around the armature.

[0014] In one embodiment, the direct-acting relay further includes a first lead and a second lead, the first lead and the second lead being respectively connected to a stationary contact, and a portion of the structure of the first lead and the second lead extending outside the housing; The direct-acting relay further includes a first connection terminal and a second connection terminal. The first connection terminal is welded to the first lead-out end, and the second connection terminal is welded to the second lead-out end. The first connection terminal is provided with a first wiring hole, and the second connection terminal is provided with a second wiring hole.

[0015] This application discloses a moving contact structure and a direct-acting relay. The moving contact structure is applied to a direct-acting relay. The moving contact structure includes a conductive bridge, a push rod, a first elastic part, and a second elastic part. The conductive bridge has two moving contacts for contacting the stationary contacts on the relay housing to control the external circuit. The push rod is movably connected to the conductive bridge, and the first elastic part and the second elastic part are provided between the push rod and the conductive bridge. The first elastic part can provide stable contact pressure when the moving contact and the stationary contact are in contact, and the second elastic part can provide a reverse elastic force for the next contact after the moving contact and the stationary contact are disconnected.

[0016] Specifically, the first elastic part and the second elastic part are stacked on one end of the push rod near the conductive bridge. The first elastic part includes an intermediate plate and two deformation arms at both ends of the intermediate plate. The two deformation arms are symmetrical about the intermediate plate and are set at an angle. The ends of the two deformation arms away from the intermediate plate abut against the conductive bridge. When the moving contact contacts the stationary contact, the push rod moves closer to the conductive bridge, thereby compressing the two deformation arms. The kinetic energy of the push rod is converted into the elastic potential energy of the two deformation arms, which is then uniformly applied to the two moving contact ends of the conductive bridge. This ensures that the forces on both sides of the conductive bridge are balanced, preventing the conductive bridge from jamming or tilting. The elastic force of the two deformation arms also acts on the conductive bridge, thereby ensuring reliable and stable contact between the moving contact and the stationary contact.

[0017] When the moving contact disconnects from the stationary contact and the push rod retracts, the second elastic part located on the first elastic part moves upward until it elastically contacts the mating structure inside the housing. At this time, the second elastic part is compressed, and the elastic potential energy of the second elastic part further increases. The elastic potential energy of the second elastic part is also converted into the thrust for the next engagement of the moving contact and the stationary contact, reducing the electromagnetic force required for the engagement of the moving contact and the stationary contact, thereby effectively reducing the relay's pull-in voltage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the dynamic contact structure provided in this application; Figure 2 for Figure 1 A schematic diagram of the forces acting on a moving contact structure in a closed state; Figure 3 for Figure 1 Schematic diagram of the exploded structure of the dynamic contact structure; Figure 4 for Figure 1 Schematic diagram of the structure of the first elastic part; Figure 5 A schematic diagram of the structure of an embodiment of the direct-acting relay provided in this application; Figure 6 A schematic diagram showing the location of the moving contact structure installed inside the housing; Figure 7 for Figure 5 Cross-sectional view of a direct-acting relay; Figure 8 This is an exploded schematic diagram of the drive mechanism in a direct-acting relay. Figure 9 This is a schematic diagram of the lead-out terminals of a direct-acting relay.

[0020] Explanation of icon numbers: 100. Moving contact structure; 1. Conductive bridge; 11. Moving contact; 2. Push rod; 3. First elastic part; 31. Intermediate plate; 32. Deformation arm; 321. Support arm; 322. Curved end; 3a. First mounting hole; 4. Second elastic part; 4a. Second mounting hole; 5. Mounting bracket; 51. Insertion part; 6. Stop block; 6a. Slot; 7. Push plate; 71. Fixing post; 8. Connecting piece; 200, Housing; 200a, First cavity; 200b, Second cavity; 210, Stationary contact; 211, First lead-out terminal; 2111, Voltage drop measurement terminal; 212, Second lead-out terminal; 2121, Current measurement terminal; 213, First connecting terminal; 2131, First fastener; 213a, First wiring hole; 214, Second connecting terminal; 2141, Second fastener; 214a, Second wiring hole; 220, Partition plate; 221, Protrusion; 230, Limiting block; 230a, Limiting groove; 300, Drive mechanism; 310, Yoke; 320, Coil frame; 330, Winding; 340, Armature; 340a, Mounting notch; 350, Magnetic guide plate; 360, Magnet; 370, Magnet support; 380, Coil lead-out end. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that if multiple embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] A direct-acting relay is an electromagnetic relay whose core feature is that the moving contact structure 100 achieves contact closure and opening through linear motion, rather than through traditional rotation or lever mechanisms. This design gives direct-acting relays advantages such as large stroke, high magnetic holding force, high transmission efficiency, and compact structure, making them particularly suitable for applications with large contact gaps and high space requirements, such as the electricity meter industry and photovoltaic inverters, energy storage systems, and charging piles in new energy applications. The direct-acting relay uses electromagnetic force generated by an electromagnetic system to drive the armature to move linearly, thereby causing the moving contact to contact or separate from the stationary contact, realizing the circuit's control function. Traditional direct-acting relays have asymmetrical or independent contact springs and reset springs, which have the following problems: the driving force and reset force are misaligned, the conductive bridge 1 is prone to tilting or jamming; uneven stress distribution of the springs results in poor mechanical life; large fluctuations in contact pressure and unstable contact resistance lead to easy arcing and erosion.

[0025] To address the aforementioned problems, this application proposes a dynamic contact structure 100 to solve the technical issues mentioned above.

[0026] Please see Figure 1 In one embodiment of this application, the moving contact structure 100 includes a conductive bridge 1, a push rod 2, a first elastic part 3, and a second elastic part 4. The conductive bridge 1 is provided with two moving contacts 11. One end of the push rod 2 is provided with the first elastic part 3 and the second elastic part 4 stacked on top of each other. The first elastic part 3 includes an intermediate plate 31 and two deformation arms 32. The two deformation arms 32 are respectively provided on both sides of the intermediate plate 31 and are arranged at an angle. The second elastic part 4 is configured to elastically abut against the mating structure on the relay housing 200 during the retraction of the moving contact structure 100. The push rod 2 is movably connected to the conductive bridge 1. The end of the conductive bridge 1 away from the intermediate plate 31 of the two deformation arms 32 elastically abuts against the side of the push rod 2.

[0027] It is understood that one end of the aforementioned push rod 2 is used to connect to the external drive mechanism 300 to realize the reciprocating motion of the push rod 2. The function of the first elastic part 3 is to provide a stable elastic force to close the moving contact 11 and the stationary contact 210, and the function of the second elastic part 4 is to provide the elastic force required to drive the moving contact 11 and the stationary contact 210 to close again during the retraction of the moving contact structure 100. That is, the moving contact structure 100 has a first motion state in which the moving contact 11 moves toward the stationary contact 210 to close the two; and a second motion state in which the moving contact 11 moves away from the stationary contact 210 to disengage the two. The directions of the first motion state and the second motion state are opposite. The first elastic part 3 acts in the first motion state of the moving contact structure 100, and the second elastic part 4 acts in the second motion state of the moving contact structure 100.

[0028] The deformation states of the first elastic part 3 and the second elastic part 4 are independent of each other, thus ensuring that the moving contact structure 100 provides precise and independent elastic force control under different motion states. Specifically, when the moving contact 11 and the stationary contact 210 are closed, the first elastic part 3 can independently provide stable contact pressure, ensuring reliable connection between the contacts, reducing the risk of contact resistance and arc erosion, and providing the initial mechanical force for the contact to open. When the moving contact 11 and the stationary contact 210 are opened, the second elastic part 4 undergoes elastic deformation, preparing for the next closure. When the closing operation begins, the second elastic part 4 provides the elastic force required for the moving contact structure 100 to engage, ensuring that the moving contact 11 can move quickly and accurately to the stationary contact 210. This independent elastic force control mechanism not only improves the reliability and accuracy of contact operation, but also extends the service life of the relay, reduces the pull-in voltage, and thus improves the overall performance and efficiency of the relay.

[0029] It should be noted that the first elastic part 3 and the second elastic part 4 can be fixed by riveting, or by coating with adhesive and fixing them together to the movable end of the push rod 2, or by screwing, bonding or other methods. This application does not limit this. In one embodiment of this application, the first elastic part 3 and the second elastic part 4 are fixed by the fixing post 71 on the push plate 7, which ensures the convenience of assembly.

[0030] It should be noted that the first elastic part 3 and the second elastic part 4 can be in the shape of a sheet, plate, wave, etc., and this application does not limit them. Any structural component of any shape with deformation capability that can convert the pushing force of the push rod 2 into an elastic force acting on the conductive bridge 1 between the push rod 2 and the conductive bridge 1 can be used as the first elastic part 3 proposed in this application. Similarly, any structural component that can provide a reverse elastic force to drive the push rod 2 to move and cause the moving contact to engage with the stationary contact again during the retraction process of the push rod 2 can be used as the first elastic part 4 of this application.

[0031] Specifically, the first elastic part 3 and the second elastic part 4 are stacked on one end of the push rod 2 near the conductive bridge 1. The first elastic part 3 includes an intermediate plate 31 and two deformation arms 32 at both ends of the intermediate plate 31. The two deformation arms 32 are symmetrical about the intermediate plate 31 and are set at an angle. The ends of the two deformation arms 32 away from the intermediate plate 31 abut against the conductive bridge 1. When the moving contact 11 contacts the stationary contact 210, the push rod 2 moves closer to the conductive bridge 1, thereby compressing the two deformation arms 32. The kinetic energy of the push rod 2 is converted into the elastic potential energy of the two deformation arms 32, which is then uniformly applied to the two moving contact 11 ends of the conductive bridge 1. This makes the forces on both sides of the conductive bridge 1 balanced, avoiding jamming or tilting of the conductive bridge 1. The elastic force of the two deformation arms 32 will also act on the conductive bridge 1, thereby ensuring reliable and stable contact between the moving contact 11 and the stationary contact 210.

[0032] When the moving contact 11 disconnects from the stationary contact 210 and the push rod 2 retracts, the second elastic part 4 provided on the first elastic part 3 will move upward until it elastically abuts against the mating structure inside the housing 200. At this time, the second elastic part 4 will be compressed, and the elastic potential energy of the second elastic part 4 will further increase. The elastic potential energy of the second elastic part 4 will also be converted into the thrust for the next engagement of the moving contact 11 and the stationary contact 210, reducing the electromagnetic force required for the engagement of the moving contact 11 and the stationary contact 210. Thus, the pull-in voltage of the relay can be adjusted by adjusting the elastic force of the elastic part 4.

[0033] Furthermore, in the first moving state of the moving contact structure 100, the first elastic part 3 is compressed, thereby generating downward pressure on the conductive bridge 1 to ensure reliable and stable contact between the moving contact 11 and the stationary contact 210. Specifically, the first elastic part 3 includes an intermediate plate 31 and two deformable arms 32 disposed on opposite sides of the intermediate plate 31. For further details, please refer to [link to relevant documentation]. Figure 4 The two deformation arms 32 are symmetrically arranged about the intermediate plate 31, and both deformation arms 32 are set at a certain angle to the intermediate plate 31. This ensures that when the push rod 2 applies force to the intermediate plate 31, the deformation arms 32 on both sides will deform relative to the intermediate plate 31, thereby providing a rebound force. It should be noted that the angle between the two deformation arms 32 and the intermediate plate 31 can be any angle between 90° and 180°. This application does not limit this angle and can be adaptively adjusted according to the material used for the deformation arms 32, the required rebound force, and the overall size of the relay product.

[0034] In one embodiment of this application, the two deformable arms 32 further include two support arms 321, which are arranged side by side and extend in the same direction. The two support arms 321 are mainly for adapting to the relay products with two conductive bridges 1, with each support arm 321 abutting against one conductive bridge 1. The advantage of this structure is that it ensures that the two conductive bridges 1 are subjected to balanced forces during movement, avoiding tilting or jamming of the conductive bridges 1 due to uneven forces. This design improves the reliability and stability of the relay, ensuring precise alignment and stable contact between the moving contact 11 and the stationary contact 210 during closing and opening processes, thereby reducing contact resistance, improving current transmission efficiency, reducing the risk of arc erosion, and extending the service life of the relay.

[0035] Since the end of each arm 321 abuts against one side of the conductive bridge 1, when the arm 321 deforms, the end of each arm 321 will slide relative to the conductive bridge 1. Therefore, to reduce the friction between the end of the arm 321 and the conductive bridge 1 and to prevent the deformation of the arm 321 from being hindered, a curled design is made at the end of each arm 321 away from the intermediate plate 31, so that the end of each arm 321 in contact with the conductive bridge 1 forms a curled end 322. For details, please refer to further documentation. Figure 4 This design causes the end of the support arm 321 that contacts the conductive bridge 1 to form a curled shape, which significantly reduces the friction between the end of the support arm 321 and the conductive bridge 1. By reducing friction, the support arm 321 can slide more smoothly relative to the conductive bridge 1 during deformation, avoiding the obstruction of deformation due to excessive friction. This not only improves the movement flexibility of the support arm 321 but also reduces wear caused by friction, extending the service life of both the support arm 321 and the conductive bridge 1. Simultaneously, this design helps ensure that the support arm 321 can transmit elastic force more effectively, thereby improving the reliability and stability of relay contact closing and opening, and enhancing the overall performance and lifespan of the relay.

[0036] Furthermore, the curled design not only reduces the friction between the end of the support arm 321 and the conductive bridge 1, but also effectively avoids stress concentration. The curled shape at the end of the support arm 321 where it contacts the conductive bridge 1 ensures that stress is evenly distributed at the contact point. This even stress distribution reduces material fatigue and fracture caused by excessive localized stress, thereby improving the mechanical strength and durability of the support arm 321. In addition, the curled end 322 design increases the contact area, further dispersing stress and ensuring that the support arm 321 maintains good elasticity and stability during long-term use, extending its service life and improving the overall reliability and performance of the relay.

[0037] For mounting and securing the first elastic part 3 and the second elastic part 4, the dynamic contact structure 100 further includes a connecting assembly, which includes a mounting bracket 5. For details, please refer to further details. Figure 1 and combined Figure 3 The mounting bracket 5 includes two vertical plates and a horizontal plate connecting the two vertical plates. The horizontal plate is connected to the push rod 2 and is stacked with the first elastic part 3 and the second elastic part 4. The ends of the two vertical plates away from the horizontal plate are connected to the conductive bridge 1. The connecting assembly also includes a stop block 6, which is located on the side of the conductive bridge 1 facing away from the push rod 2. The ends of the two vertical plates away from the horizontal plate are provided with insertion parts 51, which are inserted into the slots 6a formed by the stop block 6.

[0038] In the dynamic contact structure 100 of this application, the connecting assembly is used to install and fix the first elastic part 3 and the second elastic part 4, ensuring the stability and reliability of the entire structure. Specifically, the connecting assembly includes a mounting bracket 5 and a stop block 6. The mounting bracket 5 consists of two vertical plates and a horizontal plate. The horizontal plate connects the upper ends of the two vertical plates and is connected to the push rod 2, while being stacked with the first elastic part 3 and the second elastic part 4. The lower ends of the two vertical plates are respectively connected to the conductive bridge 1. Through this structure, the movement of the push rod 2 can be directly transmitted to the conductive bridge 1, while the first elastic part 3 and the second elastic part 4 are stably fixed between the push rod 2 and the conductive bridge 1. In addition, the connecting assembly also includes a stop block 6, which is disposed on the side of the conductive bridge 1 facing away from the push rod 2. The lower ends of the two vertical plates are provided with insertion parts 51, which are inserted into the stop block 6, further enhancing the stability of the entire structure. With this design, the first elastic part 3 and the second elastic part 4 can work stably between the push rod 2 and the conductive bridge 1, providing the necessary elastic force to ensure reliable contact and separation between the moving contact 11 and the stationary contact 210.

[0039] To ensure that the first elastic part 3 and the second elastic part 4 can be fixed to the movable end of the push rod 2, a push plate 7 is provided at the end of the push rod 2 near the conductive bridge 1, and the push plate 7 has at least one fixing post 71 facing the conductive bridge 1; the second elastic part 4 has at least one first mounting hole 3a, and the intermediate plate 31 has at least one second mounting hole 4a, with each fixing post 71 passing through a second mounting hole 4a and a first mounting hole 3a in sequence. This ensures that the first elastic part 3 and the second elastic part 4 are firmly fixed to the movable end of the push rod 2. This fixing method not only improves the stability of the structure, ensuring that the elastic components will not shift or loosen during movement, but also enhances the reliability and durability of the entire moving contact structure 100. In addition, this design facilitates assembly and maintenance, improves production efficiency, reduces manufacturing costs, and ensures precise alignment and stable contact between the moving contact 11 and the stationary contact 210 during closing and opening processes, thereby improving the overall performance of the relay.

[0040] In one embodiment of this application, the moving contact structure 100 is designed with two conductive bridges 1, which are fixed together by a connecting piece 8. It should be noted that the connecting piece 8 can be located on the side of the two conductive bridges facing the push rod 2, or on the same side of the moving contact 11. This application does not impose any restrictions on this. In one embodiment of this application, the connecting piece 8 is located on the side of the two conductive bridges facing away from the moving contact 11. For further details, please refer to the following documentation. Figure 1 Each conductive bridge 1 is equipped with a moving contact 11. The dual conductive bridge 1 design offers several advantages over a single conductive bridge 1. First, the dual conductive bridge 1 provides higher current carrying capacity. The two conductive bridges 1 can work in parallel, sharing the current and thus increasing the relay's current capacity. It also improves the contact's resistance to short-circuit current, making it suitable for high-current and high-inrush-current applications. Second, the dual conductive bridge 1 design improves contact reliability. By connecting two independent conductive bridges 1 to two moving contacts 11, the risk of contact failure due to a single conductive bridge 1 failure is reduced, enhancing the relay's stability and lifespan. Furthermore, the dual conductive bridge 1 optimizes space utilization, making the relay structure more compact and facilitating miniaturization to meet the stringent space requirements of various applications. This design also improves contact performance. The two conductive bridges 1 provide stable contact pressure, reducing contact resistance, increasing current transmission efficiency, and lowering energy consumption and heat generation, thereby enhancing the overall performance and efficiency of the relay.

[0041] In the second motion state of the moving contact structure 100, the push rod 2 causes the moving contact 11 to disengage from the stationary contact 210, and the two gradually move away from each other. During the retraction process (i.e., the second motion state), the second elastic part 4 will abut against the protrusion 221 on the partition 220 inside the housing 200. For details, please refer to further reading. Figure 6 Because the second elastic part 4 has a certain speed of motion when it abuts against the protrusion 221, the kinetic energy of the second elastic part 4 is converted into the elastic potential energy of the second elastic part 4. The second elastic part 4 is compressed, providing the thrust required for the next engagement of the moving contact 11 and the stationary contact 210, significantly reducing the electromagnetic force required for contact closure, thereby effectively reducing the relay's pull-in voltage. This design not only improves the relay's energy efficiency and reduces energy consumption, but also enhances the relay's reliability and durability under frequent operation, extending its service life. At the same time, reducing the pull-in voltage helps improve the relay's performance in low-voltage environments, enabling it to operate more stably and adapt to a wider range of application scenarios.

[0042] This application also proposes a direct-acting relay, which includes a housing 200, a moving contact structure 100 as described above, and a drive mechanism 300. The housing 200 forms a cavity, and at least two stationary contacts 210 are provided inside the housing 200. Parts of the at least two stationary contacts 210 extend outside the housing 200. Each moving contact 11 on the moving contact structure 100 is correspondingly arranged with one stationary contact 210. The push rod 2 of the moving contact structure 100 is connected to the drive end of the drive mechanism 300, and the drive end can drive the moving contact 11 to abut or disengage from the stationary contact 210. The specific structure of the moving contact structure 100 is as described in the above embodiments. Since this direct-acting relay adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] Furthermore, the internal cavity of this direct-acting relay is divided into two by a partition 220, forming a first cavity 200a for mounting the drive mechanism 300 and a second cavity 200b for accommodating the moving contact structure 100. The stationary contact 210 is also located in the second cavity 200b and is led out through a lead-out end at the end of the second cavity 200b away from the first cavity 200a.

[0044] In one embodiment of the direct-acting relay proposed in this application, to guide the moving contact structure 100 to move up and down along a predetermined trajectory, the second cavity 200b is provided with two limiting blocks 230 facing the partition 220. The two limiting blocks 230 and the housing 200 enclose a limiting groove 230a. A stop block 6 is provided on the side of the conductive bridge 1 facing away from the push rod 2, and the stop block 6 is limited in the limiting groove 230a. Specifically, when the moving contact structure 100 moves up and down under the drive of the push rod 2, the stop block 6 slides in the limiting groove 230a, thereby ensuring that the conductive bridge 1 and its moving contact 11 move along a predetermined straight trajectory. This design effectively avoids the offset or tilting of the moving contact structure 100 during movement, ensuring precise alignment and stable contact between the moving contact 11 and the stationary contact 210, and improving the reliability and performance of the relay. Preventing the four moving contacts 11 from rotating axially around the push rod 2 can significantly improve the reliability and performance of the relay. Specifically, this design ensures that the moving contact 11 remains precisely aligned with the stationary contact 210 during movement, reducing the risk of poor contact or arcing caused by contact misalignment. At the same time, preventing the rotation of the moving contact 11 reduces mechanical wear and extends the relay's lifespan.

[0045] In the technical solution of this application, the moving contact structure 100 can achieve bistable fixation, that is, it can be fixed when the moving contact 11 and the stationary contact 210 are in a closed state, and when the moving contact 11 and the stationary contact 210 are in an open state. Specifically, the drive mechanism 300 includes a yoke 310, a coil frame 320, and an armature 340. The yoke 310 is disposed in the first cavity 200a, the coil frame 320 is disposed on the yoke 310, and a winding 330 is wound around the outer periphery of the coil frame 320, forming a motion channel. The armature 340 is movably disposed in the motion channel, and one end of the armature 340 is provided with an installation notch 340a. The push rod 2 is fixed in the installation notch 340a. The end of the coil frame 320 away from the push rod 2 is provided with a magnetic plate 350. Two magnets are provided on the side of the magnetic plate 350 facing away from the coil frame 320, and the two magnets are respectively disposed on both sides of the armature 340.

[0046] In the direct-acting magnetic latching relay of this application, the realization of bistable state mainly relies on a unique magnetic circuit design and a symmetrical arrangement of two magnets. Specifically, the magnetic circuit of the relay includes a winding 330, an external magnetic circuit (composed of a U-shaped yoke 310 and a magnetic guide plate 350), an internal direct-acting armature 340, two magnets, and an annular magnetic guide plate. The two magnets are symmetrically arranged on both sides of the armature 340, and their magnetization direction is parallel to the movement direction of the armature 340. This symmetrical arrangement ensures that the magnetic force is uniformly distributed in the movement direction of the armature 340.

[0047] When the relay is in the open contact state (first steady state), the magnetic force generated by the magnet mainly forms a closed magnetic circuit through the lower magnetic guide plate 350 and the magnetic guide sheet 370 of the armature 340. The convex structure on the magnetic guide plate 350 ensures a tight fit between the armature 340 and the magnetic guide plate 350, maintaining the open contact state and adjusting the magnetic holding force of the armature. At this time, only a small electromagnetic force is needed to drive the armature 340 to move and achieve contact closure. When the relay is in the closed contact state (second steady state), the electromagnetic field generated by the coil magnetizes the armature 340. If the direction of the magnetic poles generated by the coil is repulsive to the direction of the magnetic poles acting on the armature 340, a repulsive force is generated that pushes the armature 340 upward. The armature 340 moves upward until it is in close contact with the surface of the U-shaped yoke 310. At this point, the magnetic lines of force of the magnet mainly form a new closed magnetic circuit through the magnetic guide plate 370, armature 340, U-shaped yoke 310, and magnetic guide plate 350, thereby stably holding the armature 340 in this position and achieving reliable closure and retention of the contacts. Through this design, the relay can efficiently switch between two steady states while maintaining low pull-in voltage and high reliability.

[0048] To facilitate connection with external circuits, a first connection terminal 213 and a second connection terminal 214 are respectively provided at the ends of the first lead 211 and the second lead 212 away from the housing 200. For details, please refer to further documentation. Figure 9 The first connecting terminal 213 is welded to the first lead-out terminal 211, and the second connecting terminal 214 is welded to the second lead-out terminal 212. The first connecting terminal 213 has a first wiring hole 213a, and the second connecting terminal 214 has a second wiring hole 214a. A first fastener 2131 penetrates the inner wall of the first wiring hole 213a, and a second fastener 2141 penetrates the interior of the second wiring hole 214a. The ends of the wiring harness are inserted into the first wiring hole 213a and the second wiring hole 214a respectively, and the first fastener 2131 and the second fastener 2141 are adjusted so that the ends of the first fastener 2131 and the second fastener 2141 are pressed against the wiring harness to achieve electrical connection. This connection method not only improves the stability and reliability of the connection, but also facilitates installation and maintenance, reduces contact resistance, improves current transmission efficiency, reduces energy consumption and heat generation, thereby improving the performance and service life of the entire relay system.

[0049] In one embodiment, the leads of the direct-acting relay proposed in this application also have the functions of measuring current and voltage drop. Specifically, the direct-acting relay further includes a first lead 211 and a second lead 212, which are respectively connected to a stationary contact 210. Parts of the structure of the first lead 211 and the second lead 212 extend outside the housing 200. The first lead 211 is provided with a voltage drop measuring terminal 2111, and the second lead 212 is provided with a current measuring terminal 2121. The voltage drop measuring terminal 2111 on the first lead 211 is used to measure the voltage drop flowing through the manganese copper sheet, thereby indirectly calculating the current value. The current measuring terminal 2121 on the second lead 212 is used to directly measure the current value flowing through the stationary contact 210. Through this design, accurate measurement of current and voltage drop can be achieved without adding additional measuring equipment, improving the multifunctionality and monitoring capability of the relay. Furthermore, the voltage drop measurement terminal 2111 and the current measurement terminal 2121 are at the same height to facilitate insertion and fixation on the PCB board.

[0050] Furthermore, the voltage drop measurement terminal 2111 and the current measurement terminal 2121 are at the same height, a design that facilitates direct insertion and fixing of the leads onto the PCB board. This height consistency ensures perfect alignment of the leads with the holes or pads on the PCB board during installation, thereby ensuring installation stability and reliability. This design not only simplifies the installation process and reduces installation errors but also improves production efficiency and reduces production costs. Simultaneously, the consistent height design helps maintain the stability of the electrical connection between the leads and the PCB board, ensuring accurate transmission of measurement signals, thus improving the performance and reliability of the entire relay system.

[0051] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A moving contact structure applied to a direct-acting relay, characterized in that, include: A conductive bridge, wherein the conductive bridge is provided with two moving contacts; A push rod, one end of which is provided with a first elastic part and a second elastic part. The first elastic part includes an intermediate plate and two deformation arms. The two deformation arms are respectively disposed on both sides of the intermediate plate and are arranged at an included angle. The second elastic part is configured to elastically abut against the mating structure of the relay housing during the retraction of the moving contact structure. The push rod is movably connected to the conductive bridge, and the conductive bridge elastically abuts against the push rod at the end of the two deformable arms away from the intermediate plate.

2. The dynamic contact structure as described in claim 1, characterized in that, The dynamic contact structure further includes a connecting component, which includes a mounting bracket. The mounting bracket includes two vertical plates and a horizontal plate connecting the two vertical plates. The horizontal plate is connected to the push rod and is stacked with the first elastic part and the second elastic part, or the first elastic part and the second elastic part are integrally formed. The ends of the two vertical plates away from the horizontal plate are both connected to the conductive bridge.

3. The dynamic contact structure as described in claim 2, characterized in that, The connecting assembly further includes a stop block, which is located on the side of the conductive bridge facing away from the push rod. The two vertical plates have a plug-in portion at the end away from the horizontal plate, and the two plug-in portions are plugged into the stop block.

4. The dynamic contact structure as described in any one of claims 1 to 3, characterized in that, The push rod is provided with a push plate at one end near the conductive bridge, and the push plate is provided with at least one fixing post facing the conductive bridge; The second elastic part is provided with at least one first mounting hole, the intermediate plate is provided with at least one second mounting hole, and each of the fixing posts is sequentially inserted through a second mounting hole and a first mounting hole.

5. The dynamic contact structure as described in any one of claims 1 to 3, characterized in that, The dynamic contact structure includes two conductive bridges, which are arranged side by side and spaced apart. The dynamic contact structure further includes a connecting piece, through which the two conductive bridges are connected. The connecting piece is located on one side or the other side of the conductive bridge facing the first elastic part.

6. A direct-acting relay, characterized in that, include: A housing having a receiving cavity, wherein at least two stationary contacts are provided inside the housing, and a portion of the structure of at least two of the stationary contacts extends outside the housing; In any one of the moving contact structures as described in claims 1 to 5, each of the moving contacts is provided corresponding to one of the stationary contacts; The drive mechanism includes a push rod connected to the drive end of the drive mechanism, which can drive the moving contact to abut or disengage from the stationary contact.

7. The direct-acting relay as described in claim 6, characterized in that, The housing also includes a partition that divides the accommodating cavity into a first cavity and a second cavity. The driving mechanism is located in the first cavity, and the dynamic contact structure and at least two stationary contacts are located in the second cavity. The partition plate has two protrusions on the side facing the second cavity. The two protrusions are respectively located on both sides of the push rod. The first elastic part can elastically abut or disengage from the two protrusions.

8. The direct-acting relay as described in claim 7, characterized in that, The second cavity is provided with two limiting blocks facing the partition, and the two limiting blocks and the shell enclose to form a limiting groove; The conductive bridge has a stop block on the side facing away from the push rod, and the stop block is limited to the limiting groove.

9. The direct-acting relay as described in claim 6, characterized in that, The drive mechanism includes: A yoke is provided in the accommodating cavity; A coil frame is provided on the yoke, and a winding is wound around the outer periphery of the coil frame, forming a movement channel; An armature is movably disposed in the motion channel, and one end of the armature is connected to the push rod; The magnetic guide plate has a magnet on the side facing away from the coil frame, and the magnet is located on one or both sides or the ring side of the armature.

10. The direct-acting relay as described in claim 6, characterized in that, The direct-acting relay further includes a first lead and a second lead, the first lead and the second lead being respectively connected to a stationary contact, and a portion of the structure of the first lead and the second lead extending out of the housing; The direct-acting relay further includes a first connection terminal and a second connection terminal. The first connection terminal is welded to the first lead-out end, and the second connection terminal is welded to the second lead-out end. The first connection terminal is provided with a first wiring hole, and the second connection terminal is provided with a second wiring hole.

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