Moving contact assembly and relay

Abstract

The utility model discloses a moving contact assembly and a relay, the moving contact assembly comprises a moving contact piece, the moving contact piece is provided with at least two moving contact arms, the corresponding ends of the at least two moving contact arms are connected, the other ends of the at least two moving contact arms are not contacted with each other, the other ends of the moving contact arms are provided with elastic tongue pieces, and the elastic tongue pieces are connected with the moving contact arms. The tongue piece is used for being pushed by an external driving mechanism to enable the movable contacts on the at least two movable contact arms to be connected with the at least two static contacts on the external static contact piece in a one-to-one correspondence mode, so that at least two parallel loops are formed between the movable contact piece and the external static contact piece. According to the utility model, the at least two movable contact arms are arranged on the movable contact piece, the elastic tongue pieces are arranged at the lower ends of the two movable contact arms, and pressure is provided for the movable contact by means of self-adaptive deformation generated by the tongue pieces, so that the reliable closing of the contact can be ensured, and meanwhile, the processing and mounting precision requirements of the movable contact piece and the static contact piece are also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a moving contact component and a relay. Background Art

[0002] In the relay field, low contact resistance and high anti-stiction properties are important factors affecting relay product performance. With the development of technology, the market has also put forward higher requirements for the reliability, cost-effectiveness and safety of relay products.

[0003] To meet the safety regulations for relay products, multi-break relays are currently available. These relays incorporate two sets of contact assemblies and two drive mechanisms, each of which independently drives the two sets of contact assemblies. If a product problem or an unexpected fault current in the circuit causes the relay contacts to stick, the two sets of contact assemblies are independently controlled. Even if one set of contact assemblies sticks, the other set can immediately disconnect the main circuit, ensuring electrical circuit safety. Furthermore, to reduce contact resistance, multiple contact points are incorporated into each set of contact assemblies. When closed, these points form multiple parallel branches within each set of contact assemblies, significantly reducing contact resistance.

[0004] As is well known, relays generate arcs during the opening and closing process. Repeated arcing can burn the contact end faces, causing uneven heights across multiple contacts. When these contacts are driven by the same drive mechanism, some moving contacts may not touch the stationary contacts, making reliable contact closure impossible. Furthermore, existing contact assemblies require high precision machining and assembly. Large errors in these processes can also prevent reliable contact closure. Therefore, improvements to existing technologies are necessary to overcome these shortcomings. Utility Model Content

[0005] The problem to be solved by the present invention is to provide a moving contact assembly and a relay to overcome the defect that the existing contact assembly cannot ensure reliable closure of the contacts.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a dynamic contact assembly, including: a dynamic contact piece, the dynamic contact piece is provided with at least two dynamic contact arms, and the corresponding one ends of the at least two dynamic contact arms are connected and the other ends do not contact each other, and the dynamic contact arms are each provided with an elastic tongue on the other end. The tongue is used to connect the dynamic contacts on the at least two dynamic contact arms with the at least two static contacts on the external static contact piece in a one-to-one correspondence under the push of an external driving mechanism, so as to form at least two parallel circuits between the dynamic contact piece and the external static contact piece.

[0007] As a further improvement of the present invention, the movable contact piece as a whole has a certain elastic deformation ability. When the external driving mechanism is powered off, the movable contact piece relies on its own elastic force to reset and disconnect from the external static contact piece.

[0008] As a further improvement of the present invention, at least two of the movable contact arms are each provided with an arched force arm extension at one end.

[0009] As a further improvement of the present invention, the dynamic contact piece is formed by superimposing at least one dynamic spring piece and at least one guide piece with better conductivity than the dynamic spring piece, and the tongue piece is integrally provided at the end of the dynamic spring piece.

[0010] As a further improvement of the present invention, the movable contact assembly further includes a conductive bar, and the movable contact piece is further provided with a bridging portion, which is integrally connected to one end of at least two movable contact arms, and the bridging portion is also fixedly connected to the conductive bar.

[0011] As a further improvement of the present invention, the movable contact pieces and the conductive bars are both provided with a plurality of the same number and fixedly connected one-to-one, and two adjacent conductive bars are electrically connected via a flexible connector.

[0012] As a further improvement of the present invention, the flexible connector is any one or more combinations of flexible wires, soft copper braided wires, and flexible copper busbars.

[0013] As a further improvement of the present invention, the dynamic contact assembly further includes an auxiliary pin, which is fixed on any one of the conductive bars and electrically connected thereto.

[0014] As a further improvement of the present invention, a positioning plug-in portion is provided on the conductive bus, which is used to plug and cooperate with the base of the relay to fix the conductive bus and make the moving contact piece present an overall inclined distribution compared to the external static contact piece.

[0015] The present invention also provides a relay, comprising: a static contact piece, a driving mechanism, and the dynamic contact assembly as described above, wherein the driving mechanism is used to simultaneously push at least two dynamic contact arms through the tongue piece, and to connect the dynamic contacts on the at least two dynamic contact arms with the at least two static contacts on the static contact piece in a one-to-one correspondence, so as to form at least two parallel circuits between the dynamic contact piece and the static contact piece.

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

[0017] 1. The utility model provides a moving contact assembly and a relay. At least two moving contact arms are provided on the moving contact piece, and each moving contact arm is provided with a moving contact. When the moving contact arms are connected to the two static contacts on the static contact piece in a one-to-one correspondence, 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 the safety of the product. At the same time, the two moving contact arms are provided with elastic tongues on their lower ends. Since the tongues can be elastically deformed, when an external driving mechanism pushes the tongues to make the moving contacts abut against the static contacts, even if the end faces of the two moving contacts or the two static contacts are inconsistent, the adaptive deformation generated by the tongues provides pressure for the moving contacts, which can ensure the reliable closure of the contacts. At the same time, the processing and installation accuracy requirements of the moving and static contacts are also reduced.

[0018] 2. The utility model provides an arched force arm extension on the movable contact arm, thereby extending the force arm for deformation of the movable contact arm, making it easier for the movable contact arm to deform, requiring less thrust, thereby reducing the power of the relay drive mechanism and the power consumption of the relay;

[0019] 3. The movable contact piece in the present invention is composed of at least one movable spring piece and at least one guide piece with better conductivity than the movable spring piece. The movable spring piece is used to ensure that the movable contact piece as a whole has a certain elastic deformation ability, and the guide piece can increase the conductivity of the movable contact piece as a whole and improve the load capacity.

[0020] 4. The present invention uses a flexible connector to electrically connect the two split-type conductive bars instead of designing them as an integrated structure. This can shorten the length of the conductive bar, make it less likely to deform during assembly or reduce the deformation, reduce the stress caused by deformation, improve assembly accuracy, and ensure the consistency of the moving contact piece assembly. In addition, the conductive bar in the present invention not only serves as an electrical connection, but also serves to fix the moving contact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the dynamic contact assembly of the present invention;

[0022] Figure 2 This is a right side view of the dynamic contact assembly of the present utility model;

[0023] Figure 3 This is an exploded view of the dynamic contact assembly of the present invention;

[0024] Figure 4 A three-dimensional diagram of a moving contact piece in a moving contact assembly of the present invention;

[0025] Figure 5 This is an exploded view of the moving contact piece in the moving contact assembly of the present invention;

[0026] Figure 6It is a three-dimensional diagram of the relay of the present invention.

[0027] The following description is made with reference to the accompanying drawings:

[0028] 1. Moving contact piece; 11. Moving contact arm; 111. Force arm extension; 12. Moving contact point;

[0029] 13. Moving spring; 131. Tongue; 14. Guide plate; 15. Bridging part; 2. Conductive bar; 21. Positioning plug-in part; 3. Flexible connector; 4. Auxiliary pin; 5. Static contact; 6. Driving mechanism; 7. Base. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] See Figures 1 to 5 The present invention provides a moving contact assembly and relay, comprising a moving contact piece 1 having a groove along its midsection to form at least two moving contact arms 11. In this embodiment, the two moving contact arms 11 are specifically described. The upper ends of the two moving contact arms 11 are connected to each other, while their lower ends do not contact each other due to the grooves. Both moving contact arms 11 are provided with moving contacts 12. In other words, each moving contact piece 1 in this embodiment has two moving contacts 12. Correspondingly, the outer stationary contact piece is provided with two stationary contacts corresponding to the two moving contacts 12.

[0033] Furthermore, both movable contact arms 11 are equipped with elastic tongues 131 at their lower ends. Tongues 131 are located below the movable contacts 12 and opposite the driving portion of the external drive mechanism. Driven by the external drive mechanism, tongues 131 are used to drive the movable contact arms 11, connecting the movable contacts 12 on the two movable contact arms 11 with the two static contacts on the external static contact piece in a one-to-one correspondence. This creates two parallel circuits between the movable contact piece 1 and the external static contact piece, effectively reducing the contact resistance of the relay contacts, thereby lowering temperature rise and improving product safety.

[0034] Since the tongue 131 can undergo elastic deformation, when the external driving mechanism pushes the tongue 131 to make the movable contact 12 abut against the static contact, even if the end faces of the two movable contacts 12 or the two static contacts are inconsistent, the adaptive deformation generated by the tongue 131 provides pressure for the movable contact 12, which can ensure that the contacts are reliably closed, while also reducing the processing and installation accuracy requirements of the movable contact 1 and the static contact.

[0035] In the present invention, the movable contact piece 1 as a whole has a certain elastic deformation capability. When the external driving mechanism is powered off, the movable contact piece 1 is reset by its own elastic force to disconnect from the external static contact piece.

[0036] It's worth noting that each of the two moving contact arms 11 has an arched lever extension 111 at its upper end. The convex arc of the lever extension 111 can be directed either toward or away from the stationary contact piece. By providing the lever extension 111 on the moving contact arm 11, the present invention can extend the lever arm for deformation of the moving contact arm 11, making deformation easier and requiring less thrust, thereby reducing the power of the relay drive mechanism and the power consumption of the relay.

[0037] In addition, the movable contact piece 1 is further provided with a bridging portion 15, which is integrally connected to the upper ends of the two movable contact arms 11. Specifically, the bridging portion 15 is integrally connected to the tops of the two force arm extensions 111, so that the movable contact piece 1 is U-shaped as a whole.

[0038] In the present invention, the movable contact piece 1 is composed of at least one movable spring piece 13 and at least one guide piece 14 having a better conductive performance than the movable spring piece 13. The specific number of the movable spring pieces 13 and the guide pieces 14 is not limited.

[0039] See Figure 4 and Figure 5 In this embodiment, the movable spring 13 is provided with one tongue 131 integrally formed at the lower end of the movable spring 13. Two guide vanes 14 are provided, and the shape of the portion of the movable spring 13 excluding the tongue 131 is identical to that of the guide vanes 14. The movable spring 13 is located on the outermost side, facing the external static contact. The two guide vanes 14 are superimposed on the side of the movable spring 13 facing away from the static contact. The three guide vanes 14 can be secured together by riveting or welding.

[0040] The movable spring 13 is made of a conductive metal with excellent elastic properties, such as beryllium copper, to ensure that the movable contact piece 1 as a whole has a certain elastic deformation capacity. The guide plate 14 is made of a metal material with better conductivity than the movable spring 13, such as pure copper, to increase the conductivity of the movable contact piece 1 as a whole, improve the load capacity, and reduce the temperature rise.

[0041] In addition, the movable contact assembly of the present invention further includes a conductive bar 2, and the bridge portion 15 of the movable contact piece 1 is fixedly connected to the conductive bar 2. In this embodiment, the bridge portion 15 and the conductive bar 2 are fixed by riveting, but welding or other methods can also be used.

[0042] like Figures 1 to 3As shown, the present invention provides two movable contacts 1 and two conductive bars 2, each fixedly connected in a one-to-one correspondence, with electrical continuity between the two conductive bars 2. Accordingly, two external static contacts and drive mechanisms are also provided, with the two movable contacts 1 driven independently by two drive mechanisms. Even if a problem with the relay product or an unexpected fault current in the circuit causes one set of relay contacts to stick, the other set of contacts can still disconnect normally, ensuring electrical circuit safety and reducing the risk of unreliability caused by sticking.

[0043] Preferably, the two conductive bars 2 are electrically connected via a flexible connector 3. The flexible connector 3 can be any one or more combinations of a flexible conductor (single or multi-strand conductor), a soft copper braided wire, or a flexible copper bar formed by laminating multiple copper foil sheets. By electrically connecting the two separate conductive bars 2 using a flexible connector 3 rather than designing them as a single-piece structure, the present invention can shorten the length of the conductive bars 2, making deformation less likely or less likely to occur during assembly. This eliminates stress caused by deformation, improves assembly precision, and achieves greater consistency in the assembly of the movable contact 1.

[0044] See Figure 3 and Figure 6 Both ends of the conductive bar 2 are provided with positioning plug-in parts 21, which are used to plug and cooperate with the base 7 of the relay to achieve the fixation of the conductive bar 2 and the movable contact piece 1. It can be seen that the conductive bar 2 in the present invention not only serves as an electrical connection, but also serves to fix the movable contact piece 1.

[0045] When the conductive bar 2 is assembled on the base 7, the movable contact piece 1 is tilted as a whole compared to the static contact piece (the static contact piece is arranged in the vertical direction) (e.g. Figure 2 Specifically, the lower end of the movable contact piece 1 is arranged obliquely downward in a direction away from the stationary contact piece. In this way, when the driving mechanism pushes the movable contact piece 1 to move so that the movable contact 12 abuts against the stationary contact, it can ensure that the movable contact 12 and the stationary contact are in surface contact.

[0046] See Figure 1 The dynamic contact assembly of the present invention also includes an auxiliary pin 4, which is fixed on any one of the conductive bars 2 and electrically connected thereto. The auxiliary pin 4 in this embodiment is specifically fixed on a conductive bar 2 on the left side by riveting. The auxiliary pin 4 is used in conjunction with the two static contact pieces to realize synchronous monitoring of the on-off status of the two dynamic contact pieces 1 and the two static contact pieces.

[0047] Example 2

[0048] See Figures 1 to 6The present invention also provides a relay, comprising: two static contacts 5, two drive mechanisms 6, and a movable contact assembly as described in the first embodiment. The movable contact assembly, the two static contacts 5, and the two drive mechanisms 6 are all mounted on a base 7, and the two static contacts 5 and the two drive mechanisms 6 correspond one-to-one to the two movable contact pieces 1. Each static contact piece 5 is provided with two static contacts that are opposite to the two movable contacts 12 on the movable contact piece 1. The two drive mechanisms 6 operate independently, and the drive mechanisms 6 can push the two tongues 131 on the corresponding movable contact piece 1 and drive the two movable contact arms 11 to undergo elastic deformation, so that the movable contacts 12 on the two movable contact arms 11 are connected to the two static contacts on the corresponding static contact piece 5, thereby forming two parallel circuits between the movable contact piece 1 and the static contact piece 5.

[0049] It can be seen that the movable contact assembly and relay of the present invention are provided with at least two movable contact arms 11 on the movable contact piece 1, and each movable contact 12 is provided on the movable contact arm 11. When the movable contact 12 is connected to the two static contacts on the static contact piece in a one-to-one correspondence, two parallel circuits can be formed between the movable contact piece 1 and the static contact piece, thereby reducing the contact resistance of the relay contacts, reducing the temperature rise, and improving the safety of the product; at the same time, the two movable contact arms 11 are provided with elastic tongues 131 on their lower ends. Since the tongues 131 can be elastically deformed, when the external driving mechanism pushes the tongues 131 to make the movable contact 12 abut against the static contact, even if the end faces of the two movable contacts 12 or the end faces of the two static contacts are inconsistent, the adaptive deformation generated by the tongues 131 can provide pressure for the movable contact 12, which can ensure that the contacts are reliably closed, and at the same time reduce the processing and installation accuracy requirements of the movable contact piece 1 and the static contact piece. In addition, the present invention provides an arched lever arm extension 111 on the movable contact arm 11 to extend the lever arm for deformation of the movable contact arm 11, making deformation of the movable contact arm 11 easier and requiring less thrust, thereby reducing the power of the relay drive mechanism and the power consumption of the relay. Preferably, the movable contact piece 1 in the present invention is composed of at least one movable spring piece 13 and at least one guide piece 14 having better conductivity than the movable spring piece 13. The movable spring piece 13 is used to ensure that the movable contact piece 1 has a certain elastic deformation capacity as a whole, while the guide piece 14 can increase the overall conductivity of the movable contact piece 1 and improve the load capacity. Furthermore, by electrically connecting the two separate conductive bars 2 with a flexible connector 3 instead of designing them as a single-piece structure, the present invention can shorten the length of the conductive bars 2, making deformation less likely or less likely to occur during assembly, reducing stress caused by deformation, improving assembly accuracy, and ensuring the consistency of the assembly of the movable contact piece 1. In addition, the conductive bar 2 in the present invention not only serves as an electrical connection but also serves to secure the movable contact piece 1.

[0050] 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 moving contact assembly, comprising a moving contact piece (1), characterized in that: The movable contact piece (1) is provided with at least two movable contact arms (11), and corresponding ends of at least two movable contact arms (11) are connected and the other ends do not contact each other. The movable contact arms (11) are provided with elastic tongues (131) on the other ends thereof. The tongues (131) are used to connect the movable contacts (12) on at least two movable contact arms (11) with at least two static contacts on the external static contact piece in a one-to-one correspondence under the push of an external driving mechanism, so as to form at least two parallel circuits between the movable contact piece (1) and the external static contact piece.

2. The dynamic contact assembly according to claim 1, wherein: The movable contact piece (1) as a whole has a certain elastic deformation capability. When the external driving mechanism is powered off, the movable contact piece (1) is reset by its own elastic force to disconnect from the external static contact piece.

3. The dynamic contact assembly according to claim 2, wherein: An arched force arm extension portion (111) is provided at one end of each of at least two of the movable contact arms (11).

4. The dynamic contact assembly according to claim 1, wherein: The movable contact piece (1) is formed by superimposing at least one movable spring piece (13) and at least one guide piece (14) having a better conductive property than the movable spring piece (13), and the tongue piece (131) is integrally provided at the end of the movable spring piece (13).

5. The dynamic contact assembly according to claim 1, wherein: It also includes a conductive row (2), the movable contact piece (1) is further provided with a bridging portion (15), the bridging portion (15) is integrally connected to one end of at least two movable contact arms (11), and the bridging portion (15) is also fixedly connected to the conductive row (2).

6. The dynamic contact assembly according to claim 5, wherein: The movable contact piece (1) and the conductive bar (2) are both provided with a plurality of the same number and fixedly connected in a one-to-one correspondence, and two adjacent conductive bars (2) are electrically connected via a flexible connector (3).

7. The dynamic contact assembly according to claim 6, wherein: The flexible connector (3) is any one or more combinations of flexible wires, soft copper braided wires, and flexible copper busbars.

8. The dynamic contact assembly according to claim 6, wherein: It also includes an auxiliary pin (4), which is fixed on any one of the conductive bars (2) and electrically connected thereto.

9. The dynamic contact assembly according to claim 5, wherein: The conductive bar (2) is provided with a positioning plug-in portion (21), and the positioning plug-in portion (21) is used to plug and cooperate with the base (7) of the relay to achieve the fixation of the conductive bar (2) and enable the movable contact piece (1) to be tilted as a whole compared to the external static contact piece.

10. A relay comprising a stationary contact (5) and a drive mechanism (6), characterized in that: It also includes a moving contact assembly as described in any one of claims 1 to 9, wherein the driving mechanism (6) is used to simultaneously push at least two moving contact arms (11) through the tongue (131), and to connect the moving contacts (12) on the at least two moving contact arms (11) with the at least two static contacts on the static contact piece (5) in a one-to-one correspondence, so as to form at least two parallel circuits between the moving contact piece (1) and the static contact piece (5).

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