Relay

Abstract

The utility model discloses a relay, which comprises a shell and at least two opening and closing units arranged in the shell, each opening and closing unit comprises a driving mechanism, a movable contact group and a static contact group, the movable contact groups in two adjacent opening and closing units are connected in series, each movable contact group comprises a movable contact piece, the movable contact piece is provided with at least two movable contact arms, and the movable contact arms are connected with the driving mechanism. Elastic tongue pieces are arranged at the end parts of the at least two movable contact arms; each driving mechanism is provided with an insulating push rod, the push end of each insulating push rod is opposite to all the tongue pieces on the corresponding movable contact piece and is not rigidly connected with the tongue pieces, and each driving mechanism works independently and is used for pushing the corresponding tongue piece through the corresponding insulating push rod and driving the movable contact arm to be connected with the static contact set. And at least two parallel loops are formed between the movable contact group and the static contact group. According to the utility model, the position precision of the movable contact piece can be ensured, and reliable closing of the movable contact and the static contact is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control devices, in particular to a relay. Background Art

[0002] In the field of electrical control, relays play a vital role. With the continuous development of power systems and the increasing performance requirements of power equipment, multi-break relays have gradually attracted attention.

[0003] Traditional single-break relays have certain limitations in their breaking capacity. When handling large short-circuit or fault currents, the contacts are prone to sticking, preventing them from quickly and effectively disconnecting the circuit, which in turn affects the relay's lifespan and reliability. To overcome these problems, multi-break relays have emerged. By distributing circuit interruption across multiple breakpoints, multi-break relays effectively reduce the arc energy and voltage stress at each breakpoint. Furthermore, if a product problem or an unexpected fault current in the circuit causes one of the relay contacts to stick, the other contacts can still effectively disconnect, thereby improving the relay's breaking capacity and safety.

[0004] However, existing multi-break relays still have some aspects that need improvement in their design. For example, a Chinese utility model patent with publication number CN219040364U and publication date May 16, 2023, discloses a single-drive multi-break relay in which the armature is rotatably connected to the rear end of the yoke, forming a rotational fulcrum at the connection. The rear sides of the two movable springs are fixedly connected to the lower ends of the two armatures, respectively. When a set voltage is applied to the coil, the armature can undergo positive deflection, causing the upper end of the armature to attract and connect with the head end of the magnetic core. The lower end of the armature drives the two movable springs to swing downward, causing the moving contact to connect with the static contact. Because the armature and the yoke are rotatably connected, a certain gap is required between the two to prevent them from getting stuck and being unable to rotate. However, the movable spring and the armature are rigidly fixed. Therefore, when the armature drives the movable spring to move, the presence of the gap causes the movable contact on the movable spring to deviate relative to the static contact, resulting in unreliable contact between the moving contact and the static contact. Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a relay to overcome the defect that the existing multi-break relay cannot ensure reliable closure of contacts.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a relay, comprising: a housing and at least two splitting and combining units installed in the housing, each of the splitting and combining units comprising a driving mechanism, a moving contact group and a static contact group, the moving contact groups in two adjacent splitting and combining units are connected in series, the moving contact groups each comprising a moving contact piece, the moving contact piece is provided with at least two moving contact arms, and the ends of at least two moving contact arms are provided with elastic tongues; the driving mechanisms are each provided with an insulating push rod, the pushing end on the insulating push rod and all the tongues on the corresponding moving contact piece are arranged relative to each other and are not rigidly connected, each of the driving mechanisms works independently, and is used to push the corresponding tongue through its own insulating push rod and drive the moving contact arm to connect with the static contact group, so as to form at least two parallel circuits between the moving contact group and the static contact group.

[0007] As a further improvement of the present invention, the dynamic contact piece is formed by superimposing at least one dynamic reed piece and at least one guide piece with better conductivity than the dynamic reed piece, and the tongue piece is formed by extending from one end of the dynamic reed piece and protruding out of the guide piece.

[0008] As a further improvement of the present invention, a dividing groove is provided on the moving contact piece to divide the moving contact arms into at least two side-by-side moving contact arms, and the moving contact piece is provided with a bridging portion integrally connected to at least two moving contact arms, and the moving contact arms are provided with an arched force arm extension portion at one end close to the bridging portion.

[0009] As a further improvement of the present invention, each of the movable contact groups further includes a conductive bar fixedly connected to the respective movable contact pieces, and two adjacent conductive bars are electrically connected via a flexible connector.

[0010] As a further improvement of the present invention, the shell includes a base, and the base is provided with first slots that are the same in number and one-to-one corresponding to the static contact groups. The static contact groups are inserted into the corresponding first slots in the vertical direction and are arranged opposite to the moving contact pieces at intervals; positioning plug-in parts are provided on both sides of the conductive row, and the base is also provided with second slots that are the same in number and one-to-one corresponding to the positioning plug-in parts. The positioning plug-in parts are plugged into the corresponding second slots, and the moving contact pieces are inclined as a whole compared to the static contact group.

[0011] As a further improvement of the present invention, a partition wall is provided in the middle of the base, the driving mechanism and the moving contact group are respectively located on both sides of the partition wall, and the insulating push rod and the moving contact group are located on the same side of the partition wall.

[0012] As a further improvement of the present invention, the relay further includes an auxiliary pin, which is fixed on any one of the conductive bars and is electrically connected thereto.

[0013] As a further improvement of the present invention, the insulating push rod is L-shaped, and is provided with a push arm distributed vertically and a push plate distributed horizontally. The upper end of the push arm is fixedly connected to the armature of the drive mechanism, and the push plate is integrally connected to the lower end of the push arm, and the push end is arranged on the push plate.

[0014] As a further improvement of the present invention, the driving mechanism includes an iron core, an armature, a yoke, a spring and a coil wound on the iron core. The yoke is arranged on one side of the coil in a vertical direction, and one end of the yoke is bent toward the bottom of the coil and fixedly connected to the iron core, and the other end extends vertically upward to the top side of the coil. The armature is rotatably installed on the other end of the yoke and is arranged opposite to the iron core. The spring is used to apply an elastic force to the armature in a direction away from the iron core.

[0015] As a further improvement of the present invention, each of the movable contact arms is provided with a movable contact, and each of the stationary contact groups includes a stationary contact piece, and the stationary contact piece is provided with stationary contacts corresponding one to one with the movable contacts.

[0016] The beneficial effects of the utility model are:

[0017] 1. The present invention provides a relay having at least two opening and closing units, each of which includes a drive mechanism, a moving contact group, and a stationary contact group. Since the two opening and closing units operate independently, they can drive their respective moving contact groups to connect or disconnect with the stationary contact groups, thereby realizing multi-break control. Even if a problem occurs with the relay or an unexpected fault current occurs in the circuit, causing one set of contacts of the relay to stick, the other set of contacts can still be disconnected normally, ensuring the safety of the electrical circuit and reducing the risk of unreliability caused by sticking.

[0018] 2. The present invention provides an insulating push rod on the driving mechanism, and there is no rigid connection between the insulating push rod and the moving contact piece. When the driving mechanism pushes the moving contact piece through the insulating push rod, the moving contact on the moving contact piece will not be offset compared to the static contact on the static contact group, thereby ensuring the position accuracy of the moving contact piece and further ensuring the reliable closure of the moving contact and the static contact. At the same time, the split structure of the moving contact group and the driving mechanism in the present invention is also conducive to increasing the creepage distance and reducing the risk of high and low voltage breakdown.

[0019] 3. The present invention provides at least two moving contact arms on the moving contact piece, each of which is provided with a moving contact point. When the moving contact arms are connected to the static contacts on the static contact piece in a one-to-one correspondence, at least two parallel circuits can be formed between the moving contact piece and the static contact piece, thereby reducing the contact resistance of the relay contacts, reducing the temperature rise, and improving product safety.

[0020] 4. The present invention provides a tongue at the lower end of the movable contact arm, and the tongue is elastically deformable. When the driving mechanism pushes the tongue through the insulating push rod to make the movable contact abut against the static contact, even if the end faces of the two movable contacts or the end faces of the two static contacts are inconsistent, the adaptive deformation generated by the tongue provides pressure for the movable contact, which can further ensure reliable contact closure. At the same time, it also reduces the processing and installation precision requirements of the movable and static contacts.

[0021] 5. By electrically connecting two separate conductive bars with flexible connectors instead of designing them as an integrated structure, the present invention can shorten the length of the conductive bars, making them less likely to deform or less deformed during assembly, thereby eliminating stress caused by deformation and improving assembly accuracy.

[0022] 6. The dynamic contact group and the static contact group in the present invention are both installed on the base by plugging. This installation method is very convenient, can improve assembly efficiency, and ensure position accuracy;

[0023] 7. The utility model can reduce the volume of the product and realize miniaturization of the terminal product by integrating multiple separation and combination units into the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of the relay of the present utility model;

[0025] Figure 2 This is a three-dimensional diagram of the relay of the utility model with the housing removed;

[0026] Figure 3 This is an exploded view of the relay of the utility model after removing the outer shell;

[0027] Figure 4 This is a right side view of the relay of the utility model after removing the housing and the static contact group;

[0028] Figure 5 A three-dimensional diagram of the moving contact group of the relay of the present invention;

[0029] Figure 6 This is an exploded view of the dynamic contact group of the relay of the utility model;

[0030] Figure 7 This is an exploded view of the moving contact of the relay of the present invention;

[0031] Figure 8 A three-dimensional diagram of the assembly of the movable contact group and the base of the relay of the utility model;

[0032] Figure 9 A three-dimensional diagram of the driving mechanism of the relay of the present invention;

[0033] Figure 10 This is a three-dimensional diagram of the assembly of the static contact group and the base of the relay of the utility model.

[0034] The following description is made with reference to the accompanying drawings:

[0035] 1. Housing; 11. Base; 111. First slot; 112. Second slot;

[0036] 113. Isolation wall; 12. Housing; 2. Driving mechanism; 21. Insulating push rod; 211. Push arm; 212. Push plate; 2121. Push end; 22. Iron core; 23. Armature; 24. Yoke; 25. Spring; 26. Coil; 3. Moving contact group; 31. Moving contact piece; 311. Moving contact arm; 312. Moving spring piece; 3121. Tongue; 313. Guide piece; 314. Splitting groove; 315. Bridging part; 316. Force arm extension; 317. Moving contact; 32. Conductive bar; 321. Positioning plug-in part; 33. Flexible connector; 4. Static contact group; 41. Static contact piece; 42. Static contact; 5. Auxiliary pin. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] See Figures 1 to 10 The utility model provides a relay, comprising: a housing 1 and at least two switching units installed in the housing 1.

[0039] It should be noted that the splitter and combiner units are generally arranged in pairs. For example, when used for single-line disconnection control, a pair of splitter and combiner units can be set up; for another example, when used for three-phase line disconnection control, three pairs of splitter and combiner units are configured in the housing 1 to achieve separate control of the three-phase lines.

[0040] In this embodiment, two splitting and combining units are taken as an example for detailed description.

[0041] like Figure 2 and Figure 3 As shown, the housing 1 includes a base 11, and two splitting units are mounted side by side on the base 11. The two splitting units each include a drive mechanism 2, a movable contact group 3, and a stationary contact group 4. The movable contact groups 3 in the two splitting units are connected in series, and the stationary contact groups 4 in the two splitting units are used to connect to the load circuit.

[0042] The utility model adopts an all-in-one structure, and by integrating multiple splitting and combining units into the housing 1, the volume of the product can be reduced, thereby achieving miniaturization of the terminal product.

[0043] In any splitting and combining unit, the moving contact group 3 and the stationary contact group 4 are arranged opposite each other, and the driving mechanism 2 is used to drive the moving contact group 3 to connect with the stationary contact group 4. Because the two splitting and combining units operate independently, they can drive their respective moving contact groups 3 and stationary contact groups 4 to connect or disconnect, thus achieving multi-break control. Even if a relay problem occurs or an unexpected fault current flows in the circuit, causing one set of relay contacts to stick, the other set of contacts can still disconnect normally, ensuring the safety of the electrical circuit and reducing the risk of unreliability caused by sticking.

[0044] Furthermore, both moving contact groups 3 include moving contact pieces 31, each of which is equipped with at least two moving contact arms 311, and at least two moving contact arms 311 are equipped with elastic tongues 3121 at their lower ends. Each drive mechanism 2 is equipped with an insulating push rod 21, which has a push end 2121. The push end 2121 on the insulating push rod 21 and all the tongues 3121 on the corresponding moving contact piece 31 are arranged opposite each other and are not rigidly connected. When the drive mechanism 2 is de-energized, the push end 2121 and the tongues 3121 can abut against each other or be spaced apart from each other. When each drive mechanism 2 operates independently, its insulating push rod 21 pushes the corresponding tongue 3121, driving the moving contact arm 311 to connect with the stationary contact group 4, thereby forming at least two parallel circuits between the moving contact group 3 and the stationary contact group 4.

[0045] The present invention provides at least two moving contact arms 311 on the moving contact piece 31, and each moving contact arm 311 is provided with a moving contact point 317. When the moving contact arms 311 are connected to the static contacts 42 on the static contact piece 41 in a one-to-one correspondence, at least two parallel circuits can be formed between the moving contact piece 31 and the static contact piece 41, thereby reducing the contact resistance of the relay contacts, reducing the temperature rise, and improving product safety.

[0046] Each movable contact arm 311 is provided with a movable contact 317, which is located above the tongue 3121. The two stationary contact groups 4 each include a stationary contact piece 41, and each stationary contact piece 41 is provided with a stationary contact 42 corresponding to the movable contact 317.

[0047] In this invention, by providing an insulating push rod 21 on the drive mechanism 2 and not rigidly connecting the insulating push rod 21 to the movable contact piece 31, the drive mechanism 2, through the insulating push rod 21, pushes the movable contact piece 31 to move without causing the movable contact 317 on the movable contact piece 31 to deviate from the static contact 42 on the static contact group 4. This ensures the positional accuracy of the movable contact piece 31 and, in turn, ensures reliable closure between the movable contact 317 and the static contact 42. Furthermore, the split structure of the movable contact group 3 and the drive mechanism 2 in this invention also increases creepage distance and reduces the risk of high- and low-voltage breakdown.

[0048] As is well known, relays generate arcs during the opening and closing process. Repeated arcing can burn the contact end faces, resulting in uneven heights on multiple contact ends. When the drive mechanism 2 drives the movable contact 31, some movable contacts 317 may not contact the stationary contacts 42, similarly preventing reliable contact closure. However, the present invention provides a tongue 3121 at the lower end of the movable contact arm 311, and this tongue 3121 is elastically deformable. When the drive mechanism 2, via the insulating push rod 21, pushes the tongue 3121 to bring the movable contact 317 into contact with the stationary contact 42, even if the end faces of the two movable contacts 317 or the two stationary contacts 42 are inconsistent, the adaptive deformation generated by the tongue 3121 provides pressure on the movable contact 317, further ensuring reliable contact closure. This also reduces the machining and installation precision requirements for the movable and stationary contacts 31 and 42.

[0049] In this embodiment, each movable contact piece 31 is specifically provided with two movable contact arms 311, and correspondingly, each stationary contact piece 41 is provided with two stationary contact points 42. Of course, in other embodiments of the present invention, each movable contact piece 31 may also be provided with three or more movable contact arms 311. In such a case, the number of stationary contact points 42 on the stationary contact piece 41 needs to be configured to be the same as the number of movable contacts 317, and to correspond one to one.

[0050] See Figure 5 and Figure 6 The movable contact piece 31 is provided with a dividing groove 314 to form two side-by-side movable contact arms 311. The movable contact piece 31 is provided with a bridge portion 315 integrally connected to the tops of the two movable contact arms 311. An arched lever arm extension 316 is provided at one end of the movable contact arm 311, which is closest to the bridge portion 315, i.e., at the upper end of the movable contact arm 311. The convex arc of the lever arm extension 316 can be set toward the stationary contact piece 41 or away from the stationary contact piece 41. By providing the lever arm extension 316 on the movable contact arm 311, the utility model can extend the lever arm for deformation of the movable contact arm 311, making it easier for the movable contact arm 311 to deform, requiring less thrust, thereby reducing the power of the relay drive mechanism 2 and the power consumption of the relay.

[0051] See Figure 7 The movable contact piece 31 in the present invention is composed of at least one movable spring piece 312 and at least one guide piece 313 having a better conductive performance than the movable spring piece 312. The specific number of the movable spring pieces 312 and the guide pieces 313 is not required.

[0052] In this embodiment, the movable spring 312 is provided with a single tongue 3121 extending from the lower end of the movable spring 312 and protruding from the guide plate 313. Two guide plates 313 are provided, and the shape of the portion of the movable spring 312 excluding the tongue 3121 matches that of the guide plates 313. The movable spring 312 is positioned outermost, facing the stationary contact plate 41. The two guide plates 313 are superimposed on the side of the movable spring 312 facing away from the stationary contact plate 41. The three guide plates 313 can be secured together by riveting or welding.

[0053] The movable spring 312 is made of a conductive metal with excellent elasticity, such as beryllium copper, to ensure that the movable contact piece 31 as a whole has a certain degree of elastic deformation capability. The guide piece 313 is made of a metal with better conductivity than the movable spring 312, such as pure copper, to increase the conductivity of the movable contact piece 31 as a whole, improve the load capacity, and reduce the temperature rise.

[0054] In addition, the movable contact group 3 of the present invention further includes a conductive bar 32 fixedly connected to each movable contact piece 31. In this embodiment, the bridge portion 315 of the movable contact piece 31 and the conductive bar 32 are fixed by riveting, but welding or other methods may also be used.

[0055] See Figure 5 The two conductive bars 32 are electrically connected via a flexible connector 33. The flexible connector 33 can be any one or more of a flexible conductor (single or multi-strand), a soft copper braided wire, or a flexible copper bar formed from multiple laminated copper foils. By using a flexible connector 33 to electrically connect the two separate conductive bars 32, rather than designing them as a single piece, the present invention shortens the length of the conductive bars 32, minimizing or reducing deformation during assembly. This eliminates stress caused by deformation and improves assembly accuracy.

[0056] See Figure 10 The base 11 is provided with first slots 111 having the same number as the static contact groups 4 and corresponding to each other. The static contact pieces 41 of the static contact group 4 are vertically inserted into the corresponding first slots 111 and are spaced apart and arranged opposite to the dynamic contact pieces 31.

[0057] See 7 and Figure 8Both sides of the conductive bar 32 are provided with positioning plugs 321 extending vertically downward. The base 11 is provided with the same number of second slots 112 as the positioning plugs 321, and the positioning plugs 321 are plugged into the corresponding second slots 112 to secure the movable contact group 3. The upper end of the conductive bar 32 is tilted upward, and the bridge portion 315 of the movable contact piece 31 is riveted to the upper end of the conductive bar 32. When the conductive bar 32 is plugged into the base 11, the movable contact piece 31 is tilted relative to the static contact group 4. Specifically, the lower end of the movable contact piece 31 is tilted downward, away from the static contact piece 41. This ensures that when the drive mechanism 2 pushes the movable contact piece 311 to move so that the movable contact 317 abuts the static contact 42, the movable contact 317 and the static contact 42 are in full contact.

[0058] See Figure 10 The base 11 is further provided with first slots 111 having the same number as the static contact groups 4 and corresponding to each other. The static contact pieces 41 of the static contact group 4 are vertically inserted into the corresponding first slots 111 and are spaced apart and arranged opposite to the dynamic contact pieces 31.

[0059] The movable contact group 3 and the stationary contact group 4 in the present invention are both installed on the base 11 by plugging. This installation method is very convenient, can improve assembly efficiency, and ensure position accuracy.

[0060] See Figure 2 and Figure 10 A separation wall 113 is provided in the middle of the base 11. The drive mechanism 2 and the movable contact group 3 are located on either side of the separation wall 113, and the insulating push rod 21 and the movable contact group 3 are located on the same side of the separation wall 113. By providing the separation wall 113, the utility model can increase the creepage distance between the high and low voltage parts, thereby improving product safety.

[0061] In this embodiment, the insulating push rod 21 is L-shaped and includes a vertically extending push arm 211 and a laterally extending push plate 212. The upper end of the push arm 211 is fixedly connected to the armature 23 of the drive mechanism 2. The push plate 212 is integrally connected to the lower end of the push arm 211, and the push end 2121 is disposed on the push plate 212. The L-shaped insulating push rod 21 of the present invention provides a longer lever arm and a greater travel range, allowing for a greater distance between the moving contact group 3 and the stationary contact group 4, further improving product safety.

[0062] See Figure 9The driving mechanism 2 in this embodiment is vertically mounted on the base 11, and specifically includes an iron core 22, an armature 23, a yoke 24, a spring 25, and a coil 26 wound on the iron core 22. The yoke 24 is arranged on one side of the coil 26 in the vertical direction, between the isolation wall 113 and the coil 26; the lower end of the yoke 24 is bent toward the bottom of the coil 26 and fixedly connected to the iron core 22, and the upper end thereof extends vertically upward to the top side of the coil 26. The armature 23 is rotatably mounted on the upper end of the yoke 24, and a rotating fulcrum is formed at the connection so that the armature 23 can swing around the rotating fulcrum in a lever-like manner. The armature 23 is provided with an attraction end above the iron core 22 and a swing end vertically connected to the attraction end, and the insulating push rod 21 is integrally injection-molded on the swing end of the armature 23. The elastic piece 25 is disposed between the isolation wall 113 and the armature 23 , and is used to apply an elastic force to the armature 23 in a direction away from the iron core 22 .

[0063] When the coil 26 is energized, the armature 23 is attracted by the magnetized iron core 22 and is attracted to the upper end of the iron core 22. The armature 23 drives the insulating push rod 21 to swing a certain angle. The insulating push rod 21 pushes the corresponding tongue 3121 and drives the movable contact arm 311 to move toward the static contact group 4, so that the movable contact 317 and the static contact 42 are closed. When the coil 26 is de-energized, the attraction of the iron core 22 disappears, and the armature 23 is reset under the elastic force of the spring 25. The armature 23 drives the insulating push rod 21 to swing in the opposite direction by a certain angle. The insulating push rod 21 no longer applies pressure to the movable contact piece 31, and the movable contact piece 31 is reset by its own elastic force, so that the movable contact 317 is disconnected from the static contact 42.

[0064] In addition, the relay further includes an auxiliary pin 5, which is fixed on any one of the conductive bars 32 and electrically connected thereto. Figure 5 As shown, the auxiliary pin 5 in this embodiment is fixed to a conductive bar 32 on the left side by riveting. The auxiliary pin 5 is used in conjunction with two static contacts 41 to achieve synchronous monitoring of the on-off status of the two moving contacts 31 and the two static contacts 41.

[0065] In this embodiment, the housing 1 further includes an outer shell 12 , which is disposed on the two separation and combination units and is fixed to the base 11 .

[0066] In this embodiment, the two static contacts 41 , the auxiliary pins 5 and the pins of the coil 26 all pass through the base 11 and extend outward from the same side of the base 11 so as to be connected to the corresponding circuits.

[0067] It can be seen that the relay of the present invention is provided with at least two splitting and combining units, each splitting and combining unit includes a driving mechanism 2, a moving contact group 3 and a static contact group 4. Since the two splitting and combining units work independently, they can drive their respective moving contact groups 3 and static contact groups 4 to connect or disconnect, thereby realizing multi-break control. Even when a problem occurs with the relay or an unexpected fault current occurs in the circuit, causing one set of contacts of the relay to stick, the other set of contacts can still be disconnected normally, ensuring the safety of the electrical circuit and reducing the risk of unreliability due to adhesion. At the same time, the present invention provides an insulating push rod 21 on the drive mechanism 2, and there is no rigid connection between the insulating push rod 21 and the movable contact piece 31. When the drive mechanism 2 pushes the movable contact piece 31 via the insulating push rod 21, the movable contact 317 on the movable contact piece 31 does not deviate from the static contact 42 on the static contact group 4. This ensures the positional accuracy of the movable contact piece 31 and ensures that the movable contact 317 and the static contact 42 are reliably closed. Furthermore, the split structure of the movable contact group 3 and the drive mechanism 2 in the present invention also increases creepage distance and reduces the risk of high and low voltage breakdown. Furthermore, the present invention provides at least two movable contact arms 311 on the movable contact piece 31, each of which is provided with a movable contact 317. When the movable contact arms 311 are connected to the static contact 42 on the static contact piece 41 in a one-to-one correspondence, at least two parallel circuits are formed between the movable contact piece 31 and the static contact piece 41, thereby reducing the contact resistance of the relay contacts, lowering temperature rise, and improving product safety. It is worth mentioning that the utility model is provided with a tongue 3121 at the lower end of the movable contact arm 311, and the tongue 3121 can undergo elastic deformation. When the driving mechanism 2 pushes the tongue 3121 through the insulating push rod 21 to make the movable contact 317 abut against the static contact 42, even if the end faces of the two movable contacts 317 or the end faces of the two static contacts 42 are inconsistent, the adaptive deformation amount generated by the tongue 3121 provides pressure for the movable contact 317, which can further ensure the reliable closure of the contacts, while also reducing the processing and installation accuracy requirements of the movable contact 31 and the static contact. Furthermore, by electrically connecting the two separate conductive bars 32 with a flexible connector 33, rather than designing them as a single-piece structure, the present invention can shorten the length of the conductive bars 32, making them less susceptible to deformation or less deformed during assembly. This eliminates stress caused by deformation and improves assembly precision. Both the moving contact group 3 and the stationary contact group 4 in the present invention are installed on the base 11 using a plug-in method. This installation method is very convenient, improves assembly efficiency, and ensures positioning accuracy. By integrating multiple split and combiner units within the housing 1, the present invention can reduce product volume and achieve miniaturization of the terminal product.

[0068] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A relay comprising a housing (1) and at least two opening and closing units mounted in the housing (1), each of the opening and closing units comprising a drive mechanism (2), a moving contact group (3) and a stationary contact group (4), characterized in that: The movable contact groups (3) in two adjacent splitting and combining units are connected in series, and the movable contact groups (3) each include a movable contact piece (31), and the movable contact piece (31) is provided with at least two movable contact arms (311), and at least two ends of the movable contact arms (311) are provided with elastic tongues (3121); the driving mechanism (2) is provided with an insulating push rod (21), and the pushing end (2121) on the insulating push rod (21) and all the tongues (3121) on the corresponding movable contact piece (31) are arranged relative to each other and are not rigidly connected. Each of the driving mechanisms (2) works independently and is used to push the corresponding tongue (3121) through its own insulating push rod (21) and drive the movable contact arm (311) to connect with the static contact group (4), so as to form at least two parallel circuits between the movable contact group (3) and the static contact group (4).

2. The relay according to claim 1, wherein: The movable contact piece (31) is formed by stacking at least one movable reed piece (312) and at least one guide piece (313) having a better electrical conductivity than the movable reed piece (312); the tongue piece (3121) is formed by extending from one end of the movable reed piece (312) and protruding from the guide piece (313).

3. The relay according to claim 1, wherein: The movable contact piece (31) is divided into at least two parallel movable contact arms (311) by providing a dividing groove (314). The movable contact piece (31) is provided with a bridging portion (315) integrally connected to the at least two movable contact arms (311), and an arched force arm extension portion (316) is provided at one end of the movable contact arm (311) close to the bridging portion (315).

4. The relay according to claim 1, wherein: Each of the movable contact groups (3) further comprises a conductive row (32) fixedly connected to the respective movable contact piece (31), and two adjacent conductive rows (32) are electrically connected via a flexible connector (33).

5. The relay according to claim 4, characterized in that: The housing (1) comprises a base (11), the base (11) being provided with first slots (111) of the same number and one-to-one correspondence as the static contact groups (4), the static contact groups (4) being vertically inserted into the corresponding first slots (111) and being spaced and arranged opposite to the dynamic contact pieces (31); positioning plug-in portions (321) being provided on both sides of the conductive row (32), the base (11) being further provided with second slots (112) of the same number and one-to-one correspondence as the positioning plug-in portions (321), the positioning plug-in portions (321) being plugged into the corresponding second slots (112), and making the dynamic contact pieces (31) present an overall inclined distribution compared to the static contact groups (4).

6. The relay according to claim 5, characterized in that: An isolation wall (113) is provided in the middle of the base (11), the driving mechanism (2) and the moving contact group (3) are respectively located on both sides of the isolation wall (113), and the insulating push rod (21) and the moving contact group (3) are located on the same side of the isolation wall (113).

7. The relay according to claim 4, characterized in that: It also includes an auxiliary pin (5), which is fixed on any one of the conductive bars (32) and is electrically connected thereto.

8. The relay according to claim 1, wherein: The insulating push rod (21) is L-shaped and is provided with a push arm (211) distributed vertically and a push plate (212) distributed horizontally. The upper end of the push arm (211) is fixedly connected to the armature (23) of the drive mechanism (2). The push plate (212) is integrally connected to the lower end of the push arm (211). The push end (2121) is provided on the push plate (212).

9. The relay according to claim 1, wherein: The driving mechanism (2) comprises an iron core (22), an armature (23), a yoke (24), a spring (25), and a coil (26) wound on the iron core (22); the yoke (24) is arranged on one side of the coil (26) in a vertical direction, and one end of the yoke (24) is bent toward the bottom of the coil (26) and fixedly connected to the iron core (22), and the other end thereof extends vertically upward to the top side of the coil (26); the armature (23) is rotatably mounted on the other end of the yoke (24) and is arranged opposite to the iron core (22); the spring (25) is used to apply an elastic force to the armature (23) in a direction away from the iron core (22).

10. The relay according to claim 1, wherein: Each of the movable contact arms (311) is provided with a movable contact point (317), and each of the stationary contact groups (4) includes a stationary contact piece (41), and each stationary contact piece (41) is provided with a stationary contact point (42) corresponding one-to-one to the movable contact point (317).

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