Movable contact structure and direct-acting relay

Abstract

The invention discloses a movable contact structure and a direct-acting relay, and relates to the technical field of relays, the movable contact structure comprises a conductive bridge, a push rod, a first elastic part and a second elastic part, the conductive bridge is provided with two movable contacts, and one end of the push rod is provided with the first elastic part and the second elastic part in a laminated manner. The first elastic part comprises a middle plate and two deformation arms, the two deformation arms are arranged on the two sides of the middle plate respectively, the two deformation arms are arranged in an included angle mode, the second elastic part is configured to elastically abut against a matching structure on a relay shell in the moving contact structure retreating process, and the push rod is movably connected with the conductive bridge. One ends, far away from the middle plate, of the two deformation arms elastically abut against one side of the push rod; in the technical scheme provided by the embodiment of the invention, the first elastic part can provide the contact pressure of the movable contact and the static contact and ensure reliable and stable abutting of the movable contact and the static contact, and the second elastic part can provide the thrust for next combination of the movable contact and the static contact, so that the pull-in voltage of the relay is effectively adjusted.

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. Summary of the Invention

[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:

[0006] A conductive bridge, wherein the conductive bridge is provided with two moving contacts;

[0007] 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.

[0008] 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.

[0009] In an embodiment, the dynamic contact structure further comprises a connecting assembly, the connecting assembly comprises a mounting bracket, the mounting bracket comprises two vertical plates and a horizontal plate connecting the two vertical plates, the horizontal plate is connected with the push rod and is arranged in a stack with the first elastic part and the second elastic part, and the two vertical plates are connected with the conductive bridge at the end away from the horizontal plate.

[0010] In an embodiment, the connecting assembly further comprises a stopper, the stopper is arranged on the side of the conductive bridge away from the push rod, and the two vertical plates are provided with insertion parts at the end away from the horizontal plate, and the two insertion parts are inserted into the stopper.

[0011] In an embodiment, the push rod is provided with a push plate at the end close to the conductive bridge, and the push plate is provided with at least one fixing column toward the conductive bridge.

[0012] 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 fixing column is sequentially arranged in a second mounting hole and a first mounting hole.

[0013] In an embodiment, the dynamic contact structure comprises two conductive bridges, and the two conductive bridges are arranged in parallel and spaced apart.

[0014] The dynamic contact structure further comprises a connecting sheet, and the two conductive bridges are connected through the connecting sheet, and the connecting sheet is arranged on the side of the conductive bridge toward the first elastic part.

[0015] One embodiment of the present application further provides a direct-acting relay, comprising:

[0016] A housing is formed with a containing cavity, and the housing is provided with at least two static contacts, and part of the structure of the at least two static contacts protrudes out of the housing.

[0017] The dynamic contact structure as described above, each dynamic contact is arranged in correspondence with a static contact.

[0018] A driving mechanism, the push rod is connected with the driving end of the driving mechanism, and the driving end can drive the dynamic contact to abut against or separate from the static contact.

[0019] In an embodiment, the housing further comprises a partition plate, the partition plate divides the containing cavity into a first cavity and a second cavity, the driving mechanism is arranged in the first cavity, and the dynamic contact structure and the at least two static contacts are arranged in the second cavity.

[0020] The second elastic part can elastically abut against or separate from the cavity or the cavity fixing part.

[0021] In an embodiment, the second cavity is provided with two limiting blocks towards the partition plate, and the two limiting blocks and the shell form a limiting groove.

[0022] The side of the conductive bridge away from the push rod is provided with a stop block, and the stop block is limited in the limiting groove.

[0023] In an embodiment, the driving mechanism comprises:

[0024] A yoke is arranged in the accommodating cavity.

[0025] A coil holder is arranged in the yoke, and a winding is arranged around the outer periphery of the coil holder, and the coil holder forms a movement channel.

[0026] An armature is movably arranged in the movement channel, and one end of the armature is connected with the push rod.

[0027] The side of the magnetic conducting plate away from the coil holder is provided with a magnetic steel, and the magnetic steel is arranged on one side or both sides or the ring side of the armature.

[0028] In an embodiment, the direct-acting relay further comprises a first lead-out end and a second lead-out end, the first lead-out end and the second lead-out end are respectively connected with one of the static contacts, and part of the structure of the first lead-out end and the second lead-out end extends out of the shell.

[0029] The direct-acting relay further comprises a first connecting terminal and a second connecting terminal, the first connecting terminal is welded with the first lead-out end, and the second connecting terminal is welded with the second lead-out end; the first connecting terminal is provided with a first wiring hole, and the second connecting terminal is provided with a second wiring hole.

[0030] The application provides a moving contact structure and a direct-acting relay, the moving contact structure is applied to the direct-acting relay, and the moving contact structure comprises a conductive bridge, a push rod, a first elastic part and a second elastic part, two moving contacts are arranged on the conductive bridge, and the moving contacts are used to contact static contacts on a relay shell to realize control on an external circuit, the push rod is movably connected with the conductive bridge, and the first elastic part and the second elastic part are arranged between the push rod and the conductive bridge, the first elastic part can provide stable contact pressure when the moving contacts and the static contacts are in contact, and the second elastic part can provide reverse elastic force for next contact after the moving contacts and the static contacts are disconnected.

[0031] Specifically, the first elastic part and the second elastic part are arranged in layers at one end of the push rod close to the conductive bridge, the first elastic part comprises a middle plate and two deformation arms arranged at both ends of the middle plate, the two deformation arms are arranged in axial symmetry about the middle plate and are arranged at an included angle, and one end of the two deformation arms away from the middle plate abuts against the conductive bridge. When the moving contact and the stationary contact are in contact, the push rod further approaches the conductive bridge, so that the two deformation arms are compressed, the kinetic energy of the push rod is converted into the elastic potential energy of the two deformation arms, and the elastic potential energy is uniformly applied to the two moving contact setting ends of the conductive bridge, so that the forces on both sides of the conductive bridge are balanced, the jamming and tilting of the conductive bridge are avoided, and the elastic force of the two deformation arms also acts on the conductive bridge, so that the reliable and stable abutment of the moving contact and the stationary contact is ensured.

[0032] When the moving contact and the stationary contact are disconnected and the push rod retreats, the second elastic part arranged on the first elastic part moves upward until it elastically abuts against the matching structure inside the shell. At this time, the second elastic part is compressed, the elastic potential energy of the second elastic part is further increased, and the elastic potential energy of the second elastic part is also converted into the thrust force for the next combination of the moving contact and the stationary contact, so that the electromagnetic force required for the combination of the moving contact and the stationary contact is reduced, thereby effectively reducing the pull-in voltage of the relay. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0034] Figure 1 Structure schematic diagram of an embodiment of the moving contact structure provided by the present application;

[0035] Figure 2 For Figure 1 Stress schematic diagram of the moving contact structure in a closed state;

[0036] Figure 3 For Figure 1 Explosion structure schematic diagram of the moving contact structure;

[0037] Figure 4 For Figure 1 Structure schematic diagram of the first elastic part;

[0038] Figure 5 Structure schematic diagram of an embodiment of the direct-acting relay provided by the present application;

[0039] Figure 6 Position schematic diagram of the moving contact structure installed in the shell;

[0040] Figure 7 Fig. 1 is a perspective view of a direct-acting relay according to an embodiment of the present application; Figure 5 Fig. 2 is a cross-sectional view of the direct-acting relay;

[0041] Figure 8 Fig. 3 is an exploded view of a driving mechanism in the direct-acting relay;

[0042] Figure 9 Fig. 4 is a structural schematic view of lead-out terminals of the direct-acting relay.

[0043] Brief Description of the Drawings:

[0044] 100, moving contact structure; 1, conductive bridge; 11, moving contact; 2, push rod; 3, first elastic part; 31, intermediate plate; 32, deformation arm; 321, branch arm; 322, curled end; 3a, first mounting hole; 4, second elastic part; 4a, second mounting hole; 5, mounting bracket; 51, plug-in part; 6, stop block; 6a, insertion slot; 7, push plate; 71, fixed column; 8, connecting sheet;

[0045] 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 slot;

[0046] 300, driving mechanism; 310, yoke; 320, coil holder; 330, winding; 340, armature; 340a, mounting notch; 350, magnetic conducting plate; 360, magnetic steel; 370, magnetic steel bracket; 380, coil lead-out terminal. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] It should be noted that if the directionality indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the present application, the directionality indication is only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0049] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes include the A scheme, or the B scheme, or the A and B schemes are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0050] The direct-acting relay is an electromagnetic relay, and its core feature is that the moving contact structure 100 realizes the closing and opening of the contact through linear motion, instead of through the traditional rotation or lever mechanism. This design makes the direct-acting relay have the advantages of large travel, large magnetic holding force, high transmission efficiency and compact structure, and is particularly suitable for application scenarios with large contact gap and high space requirement, such as the electric meter industry and photovoltaic inverters, energy storage systems and charging piles in new energy applications. The direct-acting relay drives the armature to move linearly through the electromagnetic force generated by the electromagnetic system, thereby driving the moving contact and the stationary contact to contact or separate, realizing the control function of the circuit. The contact spring and the reset spring of the traditional direct-acting relay are asymmetric or independently designed, which has the following problems: the driving force and the reset force are offset in direction, the conductive bridge 1 is easy to tilt or jam; the spring stress distribution is uneven, the mechanical life is poor; the contact pressure fluctuates greatly, and the unstable contact resistance leads to easy arc ablation.

[0051] In view of the above problems, the present application provides a moving contact structure 100 to solve the above-mentioned technical problems.

[0052] Please refer to Figure 1 In an embodiment of the present 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 stacked with the first elastic part 3 and the second elastic part 4, the first elastic part 3 includes a middle plate 31 and two deformation arms 32, the two deformation arms 32 are respectively arranged on both sides of the middle plate 31, and the two deformation arms 32 are arranged at an included angle, the second elastic part 4 is configured to elastically abut against the matching structure on the relay shell 200 during the retraction of the moving contact structure 100, the push rod 2 is movably connected with the conductive bridge 1, and the end of the two deformation arms 32 away from the middle plate 31 elastically abuts against one side of the conductive bridge 1 facing the push rod 2.

[0053] It can be understood that one end of the push rod 2 is used to connect with the external driving mechanism 300 to realize the reciprocating motion of the push rod 2. The first elastic part 3 is used to provide a stable elastic force to close the movable contact 11 and the static contact 210, and the second elastic part 4 is used to provide an elastic force required for the driving movable contact 11 to retreat and close the static contact 210 next time. That is, the movable contact structure 100 has a first motion state of driving the movable contact 11 to move towards the static contact 210 to close the two, and has a second motion state of driving the movable contact 11 to move away from the static contact 210 to separate the two, and the direction of the first motion state is opposite to that of the second motion state. The first elastic part 3 acts in the first motion state of the movable contact structure 100, and the second elastic part 4 acts in the second motion state of the movable contact structure 100.

[0054] The deformation states of the first elastic part 3 and the second elastic part 4 are independent of each other, so as to ensure that the movable contact structure 100 provides accurate and independent elastic force control in different motion states. Specifically, when the movable contact 11 and the static contact 210 are closed, the first elastic part 3 can independently provide a stable contact pressure to ensure reliable connection between the contacts, reduce the risk of contact resistance and arc ablation, and at the same time provide an initial mechanical force for the contact opening motion. When the movable contact 11 and the static contact 210 are disconnected, the second elastic part 4 is elastically deformed to prepare for the next closing. When the closing operation starts, the second elastic part 4 provides the elastic force required for the movable contact structure 100 to attract, so as to ensure that the movable contact 11 can quickly and accurately move to the static contact 210. This independent elastic force control mechanism not only improves the reliability and accuracy of the contact operation, but also prolongs the service life of the relay, reduces the attraction voltage, and thus improves the performance and efficiency of the entire relay.

[0055] It should be noted that the first elastic part 3 and the second elastic part 4 can be fixed by riveting, or can be fixed together at the movable end of the push rod 2 by gluing, or can be fixed by screwing, bonding, etc. The present application does not limit this, and in an embodiment of the present application, the first elastic part 3 and the second elastic part 4 are fixed by the fixing column 71 on the push plate 7, which ensures the convenience of assembly.

[0056] It should be noted that the first elastic part 3 and the second elastic part 4 can be in the shape of a sheet, a plate, a wave, etc., and the present application does not limit this. Any structure having a shape capable of converting 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 of the present application. Similarly, any structure capable of providing a reverse elastic force to drive the push rod 2 to move to attract the movable contact and the static contact next time during the retreat of the push rod 2 can be used as the first elastic part 4 of the present application.

[0057] Specifically, the first elastic part 3 and the second elastic part 4 are stacked at one end of the push rod 2 close to the conductive bridge 1, the first elastic part 3 includes a middle plate 31 and two deformation arms 32 arranged at both ends of the middle plate 31, the two deformation arms 32 are arranged in axial symmetry about the middle plate 31 and are arranged at an included angle, and the two deformation arms 32 are in abutment with the conductive bridge 1 at one end away from the middle plate 31. When the moving contact 11 is in contact with the stationary contact 210, the push rod 2 further approaches the conductive bridge 1, so that the two deformation arms 32 are compressed, the kinetic energy of the push rod 2 is converted into the elastic potential energy of the two deformation arms 32, and the kinetic energy is uniformly applied to the two moving contact 11 setting ends of the conductive bridge 1, so that the forces on both sides of the conductive bridge 1 are balanced, and the jamming and tilting of the conductive bridge 1 are avoided. The elastic force of the two deformation arms 32 also acts on the conductive bridge 1, thereby ensuring reliable and stable abutment of the moving contact 11 and the stationary contact 210.

[0058] When the moving contact 11 is disconnected from the stationary contact 210 and the push rod 2 retreats, the second elastic part 4 arranged on the first elastic part 3 moves upward until it elastically abuts with the matching structure inside the shell 200. At this time, the second elastic part 4 is compressed, the elastic potential energy of the second elastic part 4 is further increased, and the elastic potential energy of the second elastic part 4 is also converted into the thrust force for the next combination of the moving contact 11 and the stationary contact 210, thereby reducing the electromagnetic force required for the combination of the moving contact 11 and the stationary contact 210, so that the pull-in voltage of the relay can be adjusted by adjusting the elastic force of the elastic part 4.

[0059] Further, in the first movement state of the moving contact structure 100, the first elastic part 3 is compressed, thereby generating a downward pressure on the conductive bridge 1 to ensure reliable and stable abutment of the moving contact 11 and the stationary contact 210. Specifically, the first elastic part 3 includes a middle plate 31 and two deformation arms 32 arranged on opposite sides of the middle plate 31. For details, please further refer to Figure 4 , the two deformation arms 32 are arranged in axial symmetry about the middle plate 31, and the two deformation arms 32 are arranged at an included angle with the middle plate 31, so as to ensure that when the thrust of the push rod 2 acts on the middle plate 31, the deformation arms 32 on both sides will deform relative to the middle plate 31, thereby providing a rebound force. It should be noted that the included angle between the two deformation arms 32 and the middle plate 31 can be any angle between 90° and 180°, and the present application does not limit this. The included angle can be adaptively adjusted according to the material of the deformation arm 32, the required rebound force, and the overall size of the relay product.

[0060] In an embodiment of the present application, the two deformation arms 32 further comprise two branch arms 321 respectively, and the two branch arms 321 are arranged side by side and extend towards the same direction. The two branch arms 321 are mainly used to adapt to the relay product of the two conductive bridges 1, and each branch arm 321 abuts against one conductive bridge 1. The advantage of this structure is that it can ensure that the two conductive bridges 1 are balanced in force during movement, avoiding the problem of tilting or jamming of the conductive bridges 1 caused by uneven force. Through this design, the reliability and stability of the relay can be improved, ensuring the accurate alignment and stable contact of the moving contact 11 and the stationary contact 210 during closing and opening, thereby reducing the contact resistance, improving the current transmission efficiency, reducing the risk of arc ablation, and prolonging the service life of the relay.

[0061] Since the end of each branch arm 321 abuts against one side of the conductive bridge 1, when the branch arm 321 deforms, the end of each branch arm 321 will slide relative to the conductive bridge 1. In view of this, in order to reduce the friction between the end of the branch arm 321 and the conductive bridge 1 and avoid hindering the deformation of the branch arm 321, a curling design is made at the end of each branch arm 321 away from the middle plate 31, so that the end of each branch arm 321 that contacts the conductive bridge 1 forms a curled end 322. For details, please further refer to Figure 4 The end of the branch arm 321 that contacts the conductive bridge 1 forms a curled shape, which can significantly reduce the friction between the end of the branch arm 321 and the conductive bridge 1. By reducing friction, the branch arm 321 can more smoothly slide relative to the conductive bridge 1 during deformation, avoiding hindering the deformation of the branch arm 321 due to excessive friction. This not only improves the movement flexibility of the branch arm 321, but also reduces wear caused by friction, prolonging the service life of the branch arm 321 and the conductive bridge 1. At the same time, this design helps to ensure that the branch arm 321 can more effectively transmit elastic force, thereby improving the reliability and stability of the relay contact closing and opening, and improving the performance and life of the entire relay.

[0062] In addition, the curling design not only reduces the friction between the end of the branch arm 321 and the conductive bridge 1, but also effectively avoids stress concentration. The curled shape of the end of the branch arm 321 that contacts the conductive bridge 1 can make the stress evenly distributed at the contact point. Evenly distributed stress can reduce material fatigue and fracture caused by excessive local stress, thereby improving the mechanical strength and durability of the branch arm 321. In addition, the design of the curled end 322 can also increase the contact area, further dispersing the stress, ensuring that the branch arm 321 maintains good elasticity and stability during long-term use, prolonging its service life, and improving the overall reliability and performance of the relay.

[0063] In order to install and fix the first elastic part 3 and the second elastic part 4, the moving contact structure 100 further comprises a connecting assembly, which comprises a mounting bracket 5. For details, please further refer toFigure 1 And in combination Figure 3 The mounting bracket 5 includes two vertical plates and a horizontal plate connecting the two vertical plates, the horizontal plate is connected with the push rod 2 and is stacked with the first elastic part 3 and the second elastic part 4, and the ends of the two vertical plates away from the horizontal plate are connected with the conductive bridge 1. The connecting assembly further includes a stop block 6, which is arranged on the side of the conductive bridge 1 away from the push rod 2, and the ends of the two vertical plates away from the horizontal plate are provided with plug-in parts 51 which are plugged into the insertion slots 6a formed by the stop block 6.

[0064] In the moving contact structure 100 of the present application, the connecting assembly is used to mount 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 is composed of two vertical plates and a horizontal plate, the horizontal plate connects the upper ends of the two vertical plates and is connected with 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 connected with 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 further includes a stop block 6, which is arranged on the side of the conductive bridge 1 away from the push rod 2, and the lower ends of the two vertical plates are provided with plug-in parts 51 which are plugged into the stop block 6, further enhancing the stability of the entire structure. Through this design, the first elastic part 3 and the second elastic part 4 can stably work between the push rod 2 and the conductive bridge 1, providing the necessary elastic force, ensuring the reliable contact and separation of the moving contact 11 and the static contact 210.

[0065] In order to fix the first elastic part 3 and the second elastic part 4 at the movable end of the push rod 2, the end of the push rod 2 close to the conductive bridge 1 is provided with a push plate 7, and the push plate 7 is provided with at least one fixing column 71 facing the conductive bridge 1; the second elastic part 4 is provided with at least one first mounting hole 3a, and the intermediate plate 31 is provided with at least one second mounting hole 4a, and each fixing column 71 is sequentially arranged in a second mounting hole 4a and a first mounting hole 3a. In this way, the first elastic part 3 and the second elastic part 4 are firmly fixed at the movable end of the push rod 2. This fixing method not only improves the stability of the structure, ensures that the elastic parts 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 also facilitates assembly and maintenance, improves production efficiency, reduces manufacturing cost, and at the same time ensures the accurate alignment and stable contact of the moving contact 11 and the static contact 210 during closing and opening, improving the overall performance of the relay.

[0066] In an embodiment of the present application, the movable contact structure 100 is designed with two conductive bridges 1, and the two conductive bridges 1 are fixed by the connecting piece 8. It should be noted that the connecting piece 8 can be arranged on the side of the two conductive bridges 1 facing the push rod 2, or on the same side of the movable contact 11. The present application does not limit this. In an embodiment of the present application, the connecting piece 8 is arranged on the side of the two conductive bridges away from the movable contact 11. Specifically, please further refer to Figure 1 Each conductive bridge 1 is provided with a movable contact 11. The design of double conductive bridges 1 has many advantages compared to single conductive bridge 1. First, double conductive bridges 1 can provide higher current carrying capacity. The two conductive bridges 1 can work in parallel and share the current together, thereby increasing the current capacity of the relay and improving the short-circuit current resistance of the contact, which is suitable for high current and large impact current applications. Second, the design of double conductive bridges 1 can improve the reliability of the contact. By connecting two independent conductive bridges 1 to two movable contacts 11, the risk of contact failure caused by a single conductive bridge 1 is reduced, and the stability and service life of the relay are enhanced. In addition, double conductive bridges 1 can also optimize space utilization, making the structure of the relay more compact, which helps to realize miniaturization design and meet the strict requirements of different application scenarios for space. This design can also improve the contact performance of the contact. By providing stable contact pressure through two conductive bridges 1, the contact resistance is reduced, the current transmission efficiency is improved, the energy consumption and heat generation are reduced, and the performance and efficiency of the entire relay are improved.

[0067] In the second movement state of the movable contact structure 100, the push rod 2 drives the movable contact 11 to separate from the static contact 210, and the two gradually move away. In the back-off process (i.e. the second movement state), the second elastic part 4 will abut against the protrusion 221 on the partition plate 220 inside the housing 200. Specifically, please further refer to Figure 6 Since the second elastic part 4 abuts against the protrusion 221 at a certain speed, the kinetic energy of the second elastic part 4 will be converted into the elastic potential energy of the second elastic part 4, and the second elastic part 4 will be compressed to provide the required thrust for the next combination of the movable contact 11 and the static contact 210. This significantly reduces the electromagnetic force required for contact closure, thereby effectively reducing the pull-in voltage of the relay. This design not only improves the energy efficiency of the relay and reduces energy consumption, but also enhances the reliability and durability of the relay under frequent operation, prolonging its service life. At the same time, reducing the pull-in voltage helps to improve the performance of the relay in low voltage environments, making it work more stably and adapting to a wider range of application scenarios.

[0068] The application also provides a direct-acting relay, which comprises a housing 200, the movable contact structure 100 as above, and a driving mechanism 300. The housing 200 is formed with a cavity, and at least two static contacts 210 are arranged in the housing 200. Part of the structure of the at least two static contacts 210 extends out of the housing 200. Each movable contact 11 of the movable contact structure 100 is arranged in correspondence with a static contact 210. The push rod 2 of the movable contact structure 100 is connected with a driving end of the driving mechanism 300. The driving end can drive the movable contact 11 to abut against or separate from the static contact 210. The specific structure of the movable contact structure 100 is referred to the above embodiments. Since the direct-acting relay adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0069] Further, the inner cavity of the direct-acting relay is divided into two by a partition plate 220, into a first cavity 200a for installing the driving mechanism 300 and a second cavity 200b for accommodating the movable contact structure 100. The static contact 210 is also arranged in the second cavity 200b and is led out through a leading end at an end of the second cavity 200b away from the first cavity 200a.

[0070] In an embodiment of the direct-acting relay provided by the application, in order to realize the guidance of the movable contact structure 100 to move up and down along a predetermined trajectory, two limiting blocks 230 are arranged on the second cavity 200b towards the partition plate 220, and the two limiting blocks 230 and the housing 200 form a limiting groove 230a. The side of the conductive bridge 1 away from the push rod 2 is provided with a stop block 6, which is limited in the limiting groove 230a. Specifically, when the movable contact structure 100 moves up and down under the driving of the push rod 2, the stop block 6 slides in the limiting groove 230a, thereby ensuring that the conductive bridge 1 and the movable contact 11 thereon move along a predetermined straight trajectory. This design effectively avoids the deviation or inclination of the movable contact structure 100 during movement, ensures the accurate alignment and stable contact of the movable contact 11 and the static contact 210, and improves the reliability and performance of the relay. Avoiding the rotation of the four movable contacts 11 around the axis of the push rod 2 can significantly improve the reliability and performance of the relay. Specifically, this design ensures that the movable contact 11 always maintains accurate alignment with the static contact 210 during movement, reducing the risk of poor contact or arc ablation caused by contact deviation. At the same time, avoiding the rotational movement of the movable contact 11 can reduce mechanical wear and tear and prolong the service life of the relay.

[0071] In the technical solution of the application, the movable contact structure 100 can realize bistable fixation, that is, fixation can be realized when the movable contact 11 and the static contact 210 are in a closed state, and fixation can be realized when the movable contact 11 and the static contact 210 are in an open state. Specifically, the driving mechanism 300 includes a yoke 310, a coil holder 320, and an armature 340, the yoke 310 is arranged in the first cavity 200a, the coil holder 320 is arranged in the yoke 310, the outer periphery of the coil holder 320 is provided with a winding 330, the coil holder 320 forms a movement channel, the armature 340 is movably arranged in the movement channel, one end of the armature 340 is provided with a mounting gap 340a, and the push rod 2 is fixed in the mounting gap 340a, wherein the end of the coil holder 320 away from the push rod 2 is provided with a magnetic conducting plate 350, the side of the magnetic conducting plate 350 away from the coil holder 320 is provided with two magnetic steels, and the two magnetic steels are arranged on the two sides of the armature 340.

[0072] In the direct-acting magnetic latching relay of the application, the realization of bistability mainly depends on the unique magnetic circuit design and the symmetrical arrangement of the two magnetic steels. Specifically, the magnetic circuit of the relay includes the winding 330, the external magnetic circuit (composed of the U-shaped yoke 310 and the magnetic conducting plate 350), the internal direct-acting armature 340, the two magnetic steels, and the annular magnetic conducting sheet. The two magnetic steels are symmetrically arranged on the two sides of the armature 340, and the 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.

[0073] When the relay is in a contact open state (first stable state), the magnetic force generated by the magnetic steels mainly forms a closed magnetic circuit through the lower magnetic conducting plate 350 and the armature 340 magnetic conducting sheet 370. The convex structure on the magnetic conducting plate 350 ensures the close fit of the armature 340 and the magnetic conducting plate 350, maintains the open state of the contacts, and adjusts the magnetic latching force of the armature. At this time, only a small electromagnetic force is needed to drive the armature 340 to move, realizing the closing of the contacts. When the relay is in a contact closed state (second stable state), the electromagnetic field generated by the coil magnetizes the armature 340. If the magnetic pole direction generated by the coil is repulsive to the magnetic pole direction acting on the armature 340 by the magnetic steel, a repulsive force pushing the armature 340 to move upward is generated. The armature 340 moves upward until it closely fits the U-shaped yoke 310. At this time, the magnetic force lines of the magnetic steel mainly form a new closed magnetic circuit through the magnetic conducting sheet 370, the armature 340, the U-shaped yoke 310, and the magnetic conducting plate 350, thereby stably keeping the armature 340 in this position, realizing the reliable closing and keeping of the contacts. Through this design, the relay can efficiently switch between the two stable states while maintaining low pull-in voltage and high reliability.

[0074] In order to facilitate connection with external circuits, the first connection terminal 213 and the second connection terminal 214 are further arranged at the end of the first lead-out end 211 and the second lead-out end 212 away from the shell 200, respectively. Specifically, please further refer toFigure 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 is provided with a first wire hole 213a, and the second connecting terminal 214 is provided with a second wire hole 214a. The first wire hole 213a is provided with a first fastener 2131, and the second wire hole 214a is provided with a second fastener 2141. The ends of the wire harness are inserted into the first wire hole 213a and the second wire 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 tightly connected to the wire 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.

[0075] In an embodiment, the lead-out terminal of the direct-acting relay also has the functions of measuring current and voltage drop. Specifically, the direct-acting relay further comprises a first lead-out terminal 211 and a second lead-out terminal 212, which are respectively connected to a static contact 210. Part of the structure of the first lead-out terminal 211 and the second lead-out terminal 212 extends outside the shell 200. The first lead-out terminal 211 is provided with a voltage drop measurement terminal 2111, and the second lead-out terminal 212 is provided with a current measurement terminal 2121. The first lead-out terminal 211 is provided with a voltage drop measurement terminal 2111 for measuring the voltage drop across the manganese copper sheet, thereby indirectly calculating the current value. The second lead-out terminal 212 is provided with a current measurement terminal 2121 for directly measuring the current value flowing through the static contact 210. Through this design, accurate measurement of current and voltage drop can be achieved without adding additional measurement equipment, improving the multifunctionality and monitoring capability of the relay. Further, the height of the voltage drop measurement terminal 2111 and the current measurement terminal 2121 is consistent, which facilitates insertion and fixation on the PCB board.

[0076] Further, the height of the pressure drop measurement terminal 2111 and the current measurement terminal 2121 is consistent, which facilitates the direct insertion and fixation of the lead-out terminals on the PCB board. This height consistency allows the lead-out terminals to perfectly align with the jacks or pads on the PCB board during installation, ensuring the stability and reliability of the installation. This design not only simplifies the installation process, reduces installation errors, but also improves production efficiency and reduces production costs. At the same time, the consistent height design also helps to maintain the stability of the electrical connection between the lead-out terminals and the PCB board, ensuring accurate transmission of measurement signals, thereby improving the performance and reliability of the entire relay system. This design not only simplifies the installation process, reduces installation errors, but also improves production efficiency and reduces production costs. At the same time, the consistent height design also helps to maintain the stability of the electrical connection between the lead-out terminals and the PCB board, ensuring accurate transmission of measurement signals, thereby improving the performance and reliability of the entire relay system.

[0077] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A moving contact structure applied to a direct-acting relay, characterized in that, The dynamic contact structure comprises: a conductive bridge provided with two movable contacts; a push rod, one end of the push rod is provided with a first elastic part and a second elastic part in layers, the first elastic part comprises a middle plate and two deformation arms, the two deformation arms are respectively arranged on both sides of the middle plate, and the two deformation arms are arranged at an angle; the second elastic part is configured to elastically abut against the matching structure of the relay shell during the retraction of the movable contact structure; wherein the push rod is movably connected with the conductive bridge, and one end of the two deformation arms away from the middle plate elastically abuts against one side of the conductive bridge facing the push rod.

2. The move contact structure of claim 1, wherein, The movable contact structure further comprises a connecting assembly, the connecting assembly comprises a mounting bracket, the mounting bracket comprises two vertical plates and a horizontal plate connecting the two vertical plates, the horizontal plate is connected with the push rod and is arranged in layers with the first elastic part and the second elastic part or the first elastic part and the second elastic part are an integral structure, and one end of the two vertical plates away from the horizontal plate is connected with the conductive bridge.

3. The moving contact structure of claim 2, wherein The connecting assembly further comprises a stop block, the stop block is arranged on the side of the conductive bridge away from the push rod, one end of the two vertical plates away from the horizontal plate is provided with an insertion part, and the two insertion parts are inserted into the stop block.

4. The moving contact structure of any one of claims 1 to 3, wherein, One end of the push rod close to the conductive bridge is provided with a push plate, and at least one fixing column is arranged on the push plate facing the conductive bridge; The second elastic part is provided with at least one first mounting hole, the middle plate is provided with at least one second mounting hole, and each fixing column is sequentially arranged in one second mounting hole and one first mounting hole.

5. The moving contact structure of any one of claims 1 to 3, wherein The movable contact structure comprises two conductive bridges, and the two conductive bridges are arranged side by side and spaced apart; The movable contact structure further comprises a connecting sheet, the two conductive bridges are connected through the connecting sheet, and the connecting sheet is arranged on one side or the other side of the conductive bridge facing the first elastic part.

6. A direct-acting relay characterized by comprising: The shell is formed with a containing cavity, at least two static contacts are arranged in the shell, and part of the structure of the at least two static contacts protrudes out of the shell; The dynamic contact structure according to any one of claims 1 to 5, each movable contact is arranged corresponding to a static contact; The drive mechanism is connected with the drive end of the drive mechanism, and the drive end can drive the movable contact to abut against or separate from the static contact. The shell further comprises a partition plate, the partition plate divides the containing cavity into a first cavity and a second cavity, the drive mechanism is arranged in the first cavity, and the movable contact structure and the at least two static contacts are arranged in the second cavity; 7. The direct-acting relay of claim 6, wherein The side of the partition plate facing the second cavity is provided with two protrusions, the two protrusions are arranged on both sides of the push rod, and the first elastic part can elastically abut against or separate from the two protrusions. The second cavity is provided with two limiting blocks facing the partition plate, and the two limiting blocks and the shell form a limiting groove; 8. The direct-acting relay of claim 7, wherein The side of the conductive bridge away from the push rod is provided with a stop block, and the stop block is limited in the limiting groove. The drive mechanism comprises:

9. The direct-acting relay of claim 6, wherein a yoke arranged in the containing cavity; a coil holder arranged in the yoke, an outer periphery of the coil holder is provided with a winding, and the coil holder forms a movement channel; ​ An armature is movably arranged in the movement channel, one end of the armature is connected with the push rod; Wherein, the side of the magnetic conducting plate away from the coil holder is provided with a magnetic steel, the magnetic steel is arranged on one side or both sides or ring side of the armature.

10. The direct-acting relay of claim 6, wherein The direct-acting relay further comprises a first lead-out end and a second lead-out end, the first lead-out end and the second lead-out end are respectively connected with a static contact, part of the structure of the first lead-out end and the second lead-out end extends out of the shell. The direct-acting relay further comprises a first connecting terminal and a second connecting terminal, the first connecting terminal is welded with the first lead-out end, the second connecting terminal is welded with the second lead-out end; the first connecting terminal is provided with a first wiring hole, and the second connecting terminal is provided with a second wiring hole.

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