Moving contact assembly and switch

Abstract

The utility model provides a moving contact assembly and a switch, and relates to the technical field of electrical equipment, and the moving contact assembly comprises a rotating moving contact, the moving contact is driven to rotate to cooperate with a static contact for closing or opening, and the moving contact abuts against the static contact at a closing position for conduction. The orthographic projection of the abutting direction of the moving contact and the static contact on the rotating plane of the moving contact intersects with the rotating axial direction of the moving contact, so that the design condition of the narrow slit is greatly optimized, a smaller narrow slit size is achieved, and the problem that the narrow slit size cannot be further optimized due to the fact that the moving contact is limited in motion in a traditional design is solved. Therefore, by means of the design, the available lower limit of the narrow slit can be greatly reduced, and the closing efficiency is improved. Moreover, the effective optimization of the narrow slit enables the switch to maintain good arc extinguishing performance under a higher current load, thereby prolonging the service life of equipment, and reducing the maintenance cost. In addition, due to the design, the overall thickness of the switch can be effectively reduced, so that the size of the switch is reduced, and the overall weight is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more specifically, to a moving contact assembly and a switch. Background Technology

[0002] As a core component in power systems for controlling circuit on / off states, the reliability of switches directly impacts the operational safety of power equipment. Especially in the photovoltaic power generation sector, with the industry trend of grid-connected systems moving towards higher altitudes and higher power outputs, the stability requirements for critical equipment such as inverters are continuously increasing. As a safety isolation device between the DC input side of the inverter and the inverter unit, the arc-extinguishing performance of switches directly affects equipment maintenance costs and system operational reliability.

[0003] As the core actuating unit of the switch, the contact mechanism's structural design directly determines its arc-breaking efficiency. Existing technologies generally employ a double-moving-contact clamping structure, specifically: two parallel moving contact pieces are stacked vertically to form a clamping gap for the stationary contact to insert. Because the rotational movement of the moving contact within the arc-extinguishing chamber requires additional mechanical displacement space, the minimum spacing of the arc-extinguishing chamber slit must not be less than the sum of the thickness of the two moving contact pieces and the gap. This constraint results in a relatively large overall switch thickness and prevents further optimization of the slit's dimensions, making it difficult to achieve an ideal arc-extinguishing effect. Utility Model Content

[0004] The purpose of this application is to provide a moving contact assembly and a switch, addressing the shortcomings of the prior art described above.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In one aspect of this application, a moving contact assembly is provided, including a rotatably disposed moving contact. The moving contact is driven to rotate to cooperate with a stationary contact to close or open the circuit. When the moving contact is in the closed position, it abuts against the stationary contact and conducts electricity. The orthographic projection of the abutment direction between the moving contact and the stationary contact on the rotating plane of the moving contact intersects with the rotation axis of the moving contact.

[0007] Optionally, the projection of the contact direction between the moving contact and the stationary contact onto the plane of rotation of the moving contact is perpendicular to the axis of rotation of the moving contact.

[0008] Optionally, the moving contact and the stationary contact are connected by abutting each other through their opposite end faces.

[0009] Optionally, the moving contact assembly also includes an elastic element connected to the moving contact. The elastic element is used to provide a force to the moving contact that abuts against the stationary contact when the moving contact is in the closed position.

[0010] Optionally, the moving contact includes a first moving contact piece and a second moving contact piece arranged along the contact direction. The first moving contact piece and the second moving contact piece cooperate with their respective stationary contacts to close or open the circuit. The first moving contact piece and the second moving contact piece are respectively connected to the two ends of the elastic member. The elastic member is used to provide the first moving contact piece and the second moving contact piece with a contacting force against the stationary contact when the first moving contact piece and the second moving contact piece are in the closed position.

[0011] Optionally, the moving contact assembly also includes a conductor, with the first moving contact and the second moving contact respectively softly connected to both ends of the conductor.

[0012] Optionally, the first movable contact and the second movable contact are connected by at least one set of plug-in structures. The plug-in structure includes a plug-in protrusion at one end of the first movable contact near the second movable contact and a plug-in groove at one end of the second movable contact near the first movable contact. Alternatively, the plug-in structure includes a plug-in protrusion at one end of the second movable contact near the first movable contact and a plug-in groove at one end of the first movable contact near the second movable contact. The plug-in protrusion contacts the sidewall of the plug-in groove to conduct electricity.

[0013] Optionally, the insertion protrusion includes a first insertion portion and a second insertion portion connected sequentially along the abutment direction, the second insertion portion being bent relative to the first insertion portion along the rotation axis of the moving contact, and the first insertion portion and / or the second insertion portion contacting the sidewall of the insertion groove.

[0014] Optionally, the insertion protrusion is a spring piece, which abuts against the side wall of the insertion groove to deform, and the spring piece has a tendency to move toward the side wall of the insertion groove.

[0015] In another aspect of this application, a switch is provided, including an operating mechanism, a plurality of switch units and a handle. Each switch unit includes a housing, a stationary contact and a moving contact assembly of any of the above. The stationary contact is fixedly installed in the housing, and the moving contact of the moving contact assembly is rotatably installed in the housing. The handle is driven and connected to the moving contacts of the plurality of switch units respectively via the operating mechanism, so as to drive the moving contact to close or open with the stationary contact.

[0016] Optionally, each switching unit further includes an arc-extinguishing chamber installed within the housing. The arc-extinguishing chamber has an arc-extinguishing channel located on the rotation path of the moving contact. The thickness of the arc-extinguishing channel along the rotation axis of the moving contact is greater than the thickness of the moving contact along its rotation axis.

[0017] The beneficial effects of this application include:

[0018] This application provides a moving contact assembly, including a rotatably mounted moving contact. The moving contact is driven to rotate to cooperate with a stationary contact for closing or opening. In the closed position, the moving contact abuts against the stationary contact to conduct electricity. The orthographic projection of the contact direction between the moving and stationary contacts onto the rotation plane of the moving contact intersects the rotation axis of the moving contact, thus significantly optimizing the design conditions of the narrow slot. Compared with traditional clamping closing methods, this application only requires the narrow slot width to be greater than the thickness of the moving contact along its rotation axis. This simplified requirement allows designers to more flexibly design the optimal narrow slot ratio, achieving a smaller narrow slot size and avoiding the problem in traditional designs where the movement of the moving contact restricts further optimization of the narrow slot size. Therefore, this design can significantly reduce the usable lower limit of the narrow slot and improve closing efficiency. Furthermore, the effective optimization of the narrow slot allows the switch to maintain good arc-extinguishing performance under higher current loads, thereby extending the service life of the equipment and reducing maintenance costs. In addition, this design also allows for an effective reduction in the overall thickness of the switch. This optimization not only reduces the size and weight of the switch but also enhances its stability and reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This application provides a schematic diagram of the structure for closing a moving contact assembly and a stationary contact, as shown in the embodiments of the present application.

[0021] Figure 2 This is a schematic diagram of another structure for closing the moving contact assembly and stationary contact provided in an embodiment of this application;

[0022] Figure 3 This is one of the structural schematic diagrams of a moving contact assembly provided in an embodiment of this application;

[0023] Figure 4 This is a second schematic diagram of the structure of a moving contact assembly provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of another moving contact assembly provided in an embodiment of this application;

[0025] Figure 6 This is one of the structural schematic diagrams of a switch unit provided in an embodiment of this application;

[0026] Figure 7This is a second schematic diagram of the structure of a switching unit of a switch provided in an embodiment of this application;

[0027] Figure 8 This is the third schematic diagram of the structure of a switch unit provided in an embodiment of this application.

[0028] Icons: 11-Moving contact; 111-First moving contact piece; 112-Second moving contact piece; 12-Elastic element; 13-Conductor; 141-Plug-in protrusion; 1411-First plug-in part; 1412-Second plug-in part; 142-Plug-in slot; 15-Contact support; 2-Stationary contact; 21-Arc-initiating piece; 3-Housing shell; 4-Arc-extinguishing chamber; 41-Arc-extinguishing channel; v-Abutment direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] As a safety isolation device between the DC input side of the inverter and the inverter unit, the arc-extinguishing performance of the switch directly affects the maintenance cost and operational reliability of the equipment. The contact mechanism, as the core component of the switch, directly determines the arc-breaking effect. Existing technologies mostly employ a double-moving-contact clamping structure, where two parallel moving contact pieces are stacked vertically to form a clamping gap for the insertion of the stationary contact 2. However, since the moving contact 11 needs to rotate within the arc-extinguishing chamber, additional mechanical displacement space is required. This means the minimum spacing of the slit in the arc-extinguishing chamber 4 must not be less than the sum of the thickness of the moving contact 11 and the gap. This design limitation not only increases the overall thickness of the switch but also makes it difficult to optimize the slit size, thus affecting the improvement of the arc-extinguishing effect.

[0036] To address the aforementioned problems, one aspect of this application provides a moving contact assembly, such as... Figure 1 As shown, the circuit includes a rotating movable contact 11, which has a single-piece plate structure. Its rotation axis is orthogonal to the plane of the stationary contact 2, forming a planar rotary closing path to cooperate with the stationary contact 2 to achieve closing or opening functions. In the closed state, the movable contact 11 abuts against the stationary contact 2 and conducts current, ensuring normal circuit operation. Notably, the projection of the contact direction v between the movable contact 11 and the stationary contact 2 onto the rotation plane of the movable contact 11 intersects with the rotation axis of the movable contact 11. This design offers significant structural advantages compared to traditional clamp-type closing methods.

[0037] Specifically, by placing the moving contact 11 and the stationary contact 2 in the same plane and allowing the moving contact 11 to directly abut against the stationary contact 2 through rotation, the closing function can be achieved. This design significantly optimizes the relative position between the contacts by reducing the mechanical displacement space requirement, improving closing efficiency, and simplifying the structure to a certain extent. In particular, the orthogonal projection of the contact direction v between the moving contact 11 and the stationary contact 2 onto the rotation plane of the moving contact 11 intersects the rotation axis of the moving contact 11, which greatly optimizes the design conditions of the narrow slot. Preferably, the contact direction v between the moving contact 11 and the stationary contact 2 intersects the rotation axis of the moving contact 11. Compared with the traditional clamping closing method, this application only requires the narrow slot width to be greater than the thickness of the moving contact 11 along its rotation axis. This simplified requirement allows designers to design the optimal narrow slot ratio more flexibly, achieve a smaller narrow slot size, and avoid the problem in traditional designs where the movement of the moving contact 11 is restricted, preventing further optimization of the narrow slot size. Therefore, this design can significantly reduce the lower limit of the usable narrow slot and improve the closing efficiency. It should be noted that the rotation plane of the moving contact 11 is the same as the plane where the display screen is located, and the rotation axis of the moving contact 11 is perpendicular to the plane where the display screen is located.

[0038] From an overall structural perspective, the change in the contact method between the moving contact 11 and the stationary contact 2 effectively reduces the overall thickness of the switch. This optimization not only reduces the size of the equipment and the overall weight of the system but also enhances the stability and reliability of the switch. Furthermore, the effective optimization of the narrow slit allows the switch to maintain good arc-extinguishing performance under higher current loads, thereby extending the service life of the equipment and reducing maintenance costs. These improvements make the moving contact assembly of this application of significant value in fields such as photovoltaic power generation where stability and reliability are paramount.

[0039] Optionally, such as Figure 1 As shown, the orthographic projection of the contact direction v between the moving contact 11 and the stationary contact 2 onto the rotation plane of the moving contact 11 is the radial direction of the rotation path of the moving contact 11. That is, when the circuit is closed, the contact surface of the moving contact 11 extends radially and forms a contact relationship with the contact surface of the stationary contact 2, meaning the orthographic projection of the contact direction v between the moving contact 11 and the stationary contact 2 onto the rotation plane of the moving contact 11 is perpendicular to the rotation axis of the moving contact 11. Preferably, the contact direction v between the moving contact 11 and the stationary contact 2 is perpendicular to the rotation axis of the moving contact 11, thereby achieving a more precise and stable contact effect when the circuit is closed. This design avoids the problem of uneven contact caused by axial stacking in traditional designs.

[0040] Specifically, traditional clamping contact designs typically employ an 11-piece stacked arrangement of moving contacts 11, requiring additional mechanical displacement space during rotation of the moving contact 11. This not only increases design complexity but also limits the optimization of the narrow slot and the precision of contact between the contacts. However, the radial abutment design of this application achieves more precise contact between the moving contact 11 and the stationary contact 2, reducing friction and wear between the contacts and improving the switch's operating life and reliability. Furthermore, the overlapping contact surfaces of the moving contact 11 and the stationary contact 2 significantly enhance arc generation and extinguishing during the closing process. Due to the more stable and uniform contact surface, the arc dissipates rapidly upon contact separation, preventing prolonged arc sustaining and effectively reducing temperature rise and wear of the switch contacts, thus improving arc extinguishing performance.

[0041] Optionally, such as Figure 1 As shown, in the closed position, the moving contact 11 abuts against the stationary contact 2 through their opposite end faces to achieve circuit conduction. This optimizes the contact area between the contacts, providing more uniform contact pressure and reducing arcing and related problems caused by poor local contact. In this design, the contact surfaces of the moving contact 11 and the stationary contact 2 can be set to be parallel to each other. When the moving contact 11 rotates to abut against the stationary contact 2 during the closing process, their end faces directly contact each other, ensuring smooth current conduction.

[0042] Specifically, compared to traditional switch designs, the face-to-face contact of the moving contact 11 and the stationary contact 2 effectively reduces uneven contact due to the larger and more uniformly distributed contact area. This prevents material aging or damage caused by overheating at localized contact points. The face-to-face contact allows for rapid and stable current conduction during closing, resulting in a shorter arc initiation time and superior arc extinguishing. The arc can be quickly controlled, avoiding equipment damage and safety hazards caused by prolonged arc duration. Furthermore, the face-to-face contact design of the moving contact 11 and the stationary contact 2 effectively extends the switch's lifespan. In traditional designs, uneven contact pressure often leads to localized wear, accelerating switch aging. Face-to-face contact provides a more uniform pressure distribution, reducing localized wear and lowering maintenance frequency and costs. This contact method maintains high reliability over extended use, making it particularly suitable for high-load and frequent operation scenarios.

[0043] Optionally, the moving contact assembly also includes an elastic element 12, which is connected to the moving contact 11. The elastic element 12 provides a force to the moving contact 11 to abut against the stationary contact 2 when the moving contact 11 is in the closed position. The introduction of the elastic element 12 not only optimizes the contact quality between the moving contact 11 and the stationary contact 2, but also effectively improves the stability and reliability of the switch.

[0044] Specifically, the elastic element 12 plays a crucial role in the closing process. When the moving contact 11 rotates to the closed position and contacts the end face of the stationary contact 2, the elastic element 12 provides a continuous force, making the contact between the moving contact 11 and the stationary contact 2 tighter and more stable. This design ensures that sufficient contact pressure is always maintained between the contacts, preventing arcing or poor current conduction caused by poor contact or insufficient contact force. At the same time, the presence of the elastic element 12 can also alleviate the mechanical impact that may occur to the contacts during the closing process, reduce wear, and extend the service life of the switch.

[0045] Furthermore, the elastic element 12 ensures that it provides appropriate crimping force when the moving contact 11 contacts the stationary contact 2. Excessive force may cause damage to the contact surface or arcing, while insufficient force may lead to poor contact. Therefore, the design of the elastic element 12 must be able to ensure stable contact while avoiding excessive or insufficient crimping force, thus ensuring a smooth and effective closing process.

[0046] Optionally, the moving contact assembly also includes a contact bracket 15 for mounting the moving contact 11. The contact bracket 15 is rotatably mounted within the switch housing 3, and the switch adopts a single-break structure. One end of the elastic member 12 is connected to the contact bracket 15, and the other end is connected to the end of the moving contact 11 away from the stationary contact 2.

[0047] Specifically, in the open state, the elastic element 12 is in its normal state, and the orthographic projections of the moving contact 11 and the stationary contact 2 on the rotation plane of the moving contact 11 coincide. Due to the preset function of the elastic element 12, the rotation process of the moving contact 11 during closing is more stable. During the closing process, when the moving contact 11 rotates to contact the stationary contact 2, the force of the stationary contact 2 causes the moving contact 11 to compress the elastic element 12 in the radial direction of the rotation path. At this time, as the moving contact 11 continues to rotate, it will further retract in the radial direction of its rotation path due to the compression of the elastic element 12, so that the opposite end faces of the moving contact 11 and the stationary contact 2 are in contact. Then the moving contact 11 continues to rotate until it completely abuts the entire opposite end face of the stationary contact 2. During this process, the compression of the elastic element 12 can generate a certain force. This force causes the moving contact 11 to tend to extend along the rotational radial direction, thereby ensuring that the moving contact 11 can stably and reliably abut against the stationary contact 2, avoiding arcing or unstable conduction caused by poor contact.

[0048] Optionally, such as Figure 2As shown, the switch adopts a double-break structure. The moving contact 11 includes a first moving contact piece 111 and a second moving contact piece 112 arranged along the contact direction v on the contact support 15. The first moving contact piece 111 and the second moving contact piece 112 respectively cooperate with their respective stationary contacts 2 to close or open the circuit. The design of the double-break structure is mainly to improve the reliability and stability of the switch, especially in high-load, high-frequency operating environments, which can effectively reduce the generation of electric arcs and improve electrical performance.

[0049] Specifically, the first moving contact 111 and the second moving contact 112 are respectively connected to the two ends of the elastic element 12 (such as a compression spring). The elastic element 12 is used to provide the first moving contact 111 and the second moving contact 112 with a contact force against the stationary contact 2 when the first moving contact 111 and the second moving contact 112 are in the closed position, so as to ensure that the two moving contacts can generate sufficient contact pressure with the stationary contact 2 when the circuit is closed, so that the conduction between the contacts is more stable and the problem of arcing or poor conductivity caused by uneven contact is avoided.

[0050] In the open state, the elastic element 12 is in its normal state. At this time, the first moving contact 111 and the second moving contact 112 coincide with the orthographic projection of the corresponding stationary contact 2 on the rotation plane of the moving contact 11. During the closing process, when the first moving contact 111 and the second moving contact 112 rotate to contact their corresponding stationary contact 2, the two ends of the elastic element 12 are deformed by compressive force. The compression of the elastic element 12 causes the first moving contact 111 and the second moving contact 112 to move radially towards each other along their rotation path during the rotation process. This causes the first moving contact 111 and the second moving contact 112 to retract radially to fit against the opposite end face of the corresponding stationary contact 2. As the first moving contact 111 and the second moving contact 112 continue to rotate until their end faces are fully abutting against the end face of the stationary contact 2, the elastic element 12 will continue to provide the force generated by the compression, making the contact between the moving contact and the stationary contact 2 tighter and more stable, thereby effectively ensuring the contact quality of the contacts throughout the closing process.

[0051] Optionally, such as Figure 3 and Figure 4 As shown, the moving contact assembly also includes a conductor 13, and the first moving contact piece 111 and the second moving contact piece 112 are respectively softly connected to the two ends of the conductor 13 to ensure reliable current conduction in the closed state.

[0052] The conductor 13 can be designed using deformable conductor materials such as wires or flexible connecting wires. These conductor materials have good flexibility, allowing the moving contact to adjust its position according to changes in the radial direction of rotation during rotation, while still maintaining the continuity and stability of the current path. The flexibility of the conductor 13 ensures that it can freely deform with the movement of the moving contact, avoiding problems such as poor conductivity or poor contact caused by rotation. Therefore, even if the moving contact shifts or rotates during closing, the conductor 13 can still effectively conduct current, ensuring the efficient operation of the electrical switch under different operating conditions.

[0053] Furthermore, the flexibility of conductor 13 makes the connection between the moving contact and conductor 13 more reliable, especially under high load and high frequency operation, reducing losses caused by mechanical stress or friction. This design not only improves the electrical performance of the contacts but also enhances the durability and stability of the moving contact assembly, reducing the risks associated with poor contact or arcing.

[0054] Optionally, such as Figure 5 As shown, the first movable contact 111 and the second movable contact 112 are connected by at least one set of plug-in structures. The plug-in structure includes a plug-in protrusion 141 located at one end of the first movable contact 111 near the second movable contact 112 and a plug-in groove 142 located at one end of the second movable contact 112 near the first movable contact 111. Alternatively, the plug-in structure includes a plug-in protrusion 141 located at one end of the second movable contact 112 near the first movable contact 111 and a plug-in groove 142 located at one end of the first movable contact 111 near the second movable contact 112. This design, through the cooperation of the plug-in protrusion 141 and the plug-in groove 142, provides a stable mechanical connection and a reliable current conduction path.

[0055] When the circuit is closed, the plug protrusion 141 contacts the side wall of the plug groove 142, forming a stable physical connection, allowing current to flow through the contact surface of the plug structure. The plug structure not only provides a reliable mechanical connection but also ensures the stability of electrical performance. Due to the tight fit between the plug protrusion 141 and the plug groove 142, current instability or arcing caused by poor contact or looseness is effectively prevented. Furthermore, this plug structure provides stable support during the movement of the moving contact, preventing wear or deformation of the moving contact 11 due to uneven force during rotation, thereby improving the service life of the switch.

[0056] Furthermore, the plug-in structure design provides mechanical self-alignment capability. During closing, the plug protrusion 141 and plug slot 142 ensure the correct position of the two moving contacts through natural alignment, greatly reducing contact problems caused by human error or improper operation. This allows the switch to maintain stable electrical performance and efficient closing capability even with frequent operation and long-term use.

[0057] Optionally, such as Figure 5 As shown, the first moving contact 111 and the second moving contact 112 are connected by two sets of plug-in structures. For example, plug-in protrusions 141 and plug-in slots 142 are respectively provided on both sides of the end of the first moving contact 111 near the second moving contact 112, while plug-in slots 142 and plug-in protrusions 141 are respectively provided on both sides of the end of the second moving contact 112 near the first moving contact 111. Alternatively, plug-in protrusions 141 are provided on both sides of the end of the first moving contact 111 near the second moving contact 112, while plug-in slots 142 are provided on both sides of the end of the second moving contact 112 near the first moving contact 111. The cooperation of these two sets of plug-in structures can ensure a stable connection between the moving contacts and effectively realize the conduction of current when the circuit is closed.

[0058] Specifically, the two sets of plug-in structures, through the complementary design of plug-in protrusions 141 and plug-in slots 142, provide stable mechanical connections. When the first moving contact 111 and the second moving contact 112 approach each other, the plug-in protrusion 141 inserts into the corresponding plug-in slot 142, achieving precise docking and positioning. This design effectively prevents the contacts from loosening during operation due to external vibration or load changes, ensuring that the contacts always maintain a stable connection. Furthermore, the plug-in structure not only provides a reliable mechanical connection but also, through the cooperation of the plug-in protrusion 141 and the plug-in slot 142, forms an effective current conduction path during closing. When the plug-in structures of the two moving contacts dock, the plug-in protrusion 141 contacts the sidewall of the corresponding plug-in slot 142, achieving reliable current conduction.

[0059] Optionally, the insertion protrusion 141 includes a first insertion portion 1411 and a second insertion portion 1412 connected sequentially along the contact direction v. The second insertion portion 1412 is bent relative to the first insertion portion 1411 along the rotation axis of the moving contact 11. This design, through precise structural fit, can ensure that the contacts maintain a stable contact force during the closing process and improve the reliability of electrical conduction.

[0060] Specifically, when the plug protrusion 141 engages with the plug groove 142, only the first plug portion 1411 contacts one side wall of the plug groove 142 along the rotation axis of the moving contact 11; or only the second plug portion 1412 contacts the other side wall of the plug groove 142 along the rotation axis of the moving contact 11; or the first plug portion 1411 and the second plug portion 1412 respectively contact opposite side walls of the plug groove 142 along the rotation axis of the moving contact 11. These different contact methods ensure smooth current conduction during closing. Through the bending design of the second plug portion 1412, the plug protrusion 141 can effectively enhance the contact stability with the plug groove 142, helping to eliminate poor contact caused by structural looseness or friction, thereby reducing arcing or overheating caused by local poor contact.

[0061] Furthermore, this design improves the stability of current conduction. During closing, the various parts of the plug protrusion 141 contact the sidewall of the plug groove 142, ensuring smooth current flow between the contacts. This feature is crucial for high-current applications, especially in high-load, high-frequency power systems, preventing arcing and improving the arc-extinguishing performance of the switch. Regardless of minute contact displacement or changes in the operating environment, the plug structure consistently provides reliable electrical contact, ensuring stable operation of the switching system.

[0062] Optionally, the insertion protrusion 141 is a spring piece, which abuts against the side wall of the insertion slot 142 to deform, and the spring piece tends to move toward the side wall of the insertion slot 142. This design enables the contacts to provide a more uniform and stable contact force during the closing process, thereby improving the electrical performance and service life of the switch.

[0063] Specifically, when the spring piece of the insertion protrusion 141 contacts the side wall of the insertion groove 142, the spring piece deforms, generating a certain elastic pressure. This deformation makes the contact between the insertion protrusion 141 and the insertion groove 142 tighter, ensuring a stable current conduction path between the contacts. The elastic characteristics of the spring piece allow it to adapt to small offsets and displacements of the contact surface, ensuring that the contact pressure remains within a suitable range during contact rotation and closing, avoiding arcing or current instability caused by uneven contact or insufficient contact force. In addition, the spring piece can adaptively adjust its deformation direction during contact, thereby ensuring that the insertion structure always maintains a reliable connection. This characteristic not only enhances the mechanical connection between the moving contact and the stationary contact 2, but also improves the electrical stability when the contacts are closed. The elastic force of the spring piece gives the contacts a self-aligning capability when closing, without the need for external adjustment or intervention, thereby ensuring a uniform distribution of contact force and stable current conduction.

[0064] Another aspect of this application provides a switch, including an operating mechanism, multiple switch units, and a handle, such as... Figure 6 As shown, each switch unit includes a housing 3, a stationary contact 2, and any of the aforementioned moving contact assemblies. The stationary contact 2 is fixedly installed inside the housing 3, and the moving contact 11 of the moving contact assembly is rotatably installed inside the housing 3. The handle is connected to the moving contacts 11 of multiple switch units via an operating mechanism to drive the moving contacts 11 to close or open with the stationary contact 2. Since the switch uses the aforementioned moving contact assembly, it also has the same beneficial effects as the moving contact assembly, which will not be elaborated further here.

[0065] Optionally, such as Figure 7 As shown, each switching unit also includes an arc-extinguishing chamber 4 installed within the housing 3. The arc-extinguishing chamber 4 has an arc-extinguishing channel 41 located on the rotation path of the moving contact 11. The thickness of the arc-extinguishing channel 41 along the rotation axis of the moving contact 11 is greater than the thickness of the moving contact 11 along its rotation axis. This design ensures effective cooperation between the moving contact 11 and the arc-extinguishing chamber 4 during rotation, improving arc control and arc extinguishing effects.

[0066] Specifically, the housing 3 contains an annular chamber for rotating the moving contact assembly. The arc-extinguishing chamber 4 is arranged on the outer periphery of the annular chamber, and the arc-extinguishing channel 41 of the arc-extinguishing chamber 4 is located precisely on the rotation path of the moving contact 11. This design allows the end of the moving contact 11 that abuts against the stationary contact 2 to pass smoothly through the arc-extinguishing chamber 4 during rotation. This ensures that when the moving contact 11 is disconnected from the stationary contact 2, the arc is rapidly transferred into the arc-extinguishing chamber 4 as the moving contact 11 rotates towards it, thus achieving rapid arc extinguishing.

[0067] Furthermore, due to the radial contact between the moving contact 11 and the stationary contact 2, the moving contact 11 only needs to adopt a monolithic design, effectively reducing the space required for the moving contact 11 along its rotation axis. This, in turn, allows for a reduction in the thickness of the arc-extinguishing channel 41 along the rotation axis of the moving contact assembly. This improvement enables the switch to achieve narrow-slit arc extinguishing in its design, further enhancing the arc extinguishing effect by reducing the size of the arc-extinguishing channel 41. The narrow-slit arc extinguishing design allows the switch to maintain excellent arc-extinguishing performance even under higher current loads. In conventional designs, a larger arc-extinguishing channel 41 typically leads to an excessively long arc duration during contact separation, increasing contact wear and damage. By reducing the thickness of the arc-extinguishing channel 41, this application accelerates arc dissipation, avoiding heat accumulation and material damage caused by excessively long arc duration.

[0068] Optionally, such as Figure 8 As shown, an arc-inducing plate 21 is provided on the side of the stationary contact 2 near the arc-extinguishing chamber 4 so that the electric arc can quickly enter the arc-extinguishing chamber 4 during the opening process.

[0069] This application also provides a power distribution device, which is equipped with the aforementioned moving contact assembly and / or switch. The power distribution device can be configured with at least one of the following: a distribution box, cable, distribution cabinet, motor, switch socket, lamp, air conditioner, electric water heater, electricity meter, camera, telephone, computer, etc. Such power distribution devices can utilize the moving contact assembly and / or switch-related structures of this application to achieve intelligent management, but are not limited to the above-mentioned intelligent management power distribution devices; they can also be used in non-intelligent power distribution devices in traditional industries.

[0070] This application also provides a power distribution device, which applies the aforementioned moving contact assembly and / or switch to the power distribution device. The power distribution device can be used in smart scenarios, intelligent usage scenarios and the Internet of Things industry to achieve intelligent scenario-based management.

[0071] Optionally, the embodiments of this application can be used for: fire protection power supply: fire control room, fire pump, smoke prevention and exhaust system, fire elevator and its drainage pump, fire emergency lighting, etc. (Level 1); corridor lighting, duty lighting, guard lighting, obstacle marker lights; rail transit; security system power supply; electronic information computer room power supply; passenger elevator power supply; sewage pump; variable frequency speed regulation constant pressure water supply pump (otherwise it is a Level 2 load); main offices, conference rooms, general duty room, archives room.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A moving contact assembly, characterized by, The device includes a rotatable moving contact (11), which is driven to rotate to cooperate with the stationary contact (2) to close or open the circuit. When the moving contact (11) is in the closed position, it abuts against the stationary contact (2) and conducts electricity. The abutment direction (v) of the moving contact (11) and the stationary contact (2) is projected onto the rotation plane of the moving contact (11) and intersects the rotation axis of the moving contact (11).

2. The movable contact assembly of claim 1, wherein, The contact direction (v) between the moving contact (11) and the stationary contact (2) is perpendicular to the rotation axis of the moving contact (11) when projected onto the rotation plane of the moving contact (11).

3. The movable contact assembly of claim 1, wherein, The moving contact (11) and the stationary contact (2) are connected by abutting each other through their opposite end faces.

4. The movable contact assembly of any of claims 1 to 3, wherein, The moving contact assembly also includes an elastic element (12), which is connected to the moving contact (11). The elastic element (12) is used to provide a force to the moving contact (11) to abut against the stationary contact (2) when the moving contact (11) is in the closed position.

5. The movable contact assembly of claim 4, wherein, The moving contact (11) includes a first moving contact piece (111) and a second moving contact piece (112) arranged along the abutment direction (v). The first moving contact piece (111) and the second moving contact piece (112) cooperate with their respective stationary contacts (2) to close or open the circuit. The first moving contact piece (111) and the second moving contact piece (112) are respectively connected to the two ends of the elastic member (12). The elastic member (12) is used to provide the first moving contact piece (111) and the second moving contact piece (112) with abutment force against the stationary contact (2) when the first moving contact piece (111) and the second moving contact piece (112) are in the closed position.

6. The movable contact assembly of claim 5, wherein, The moving contact assembly also includes a conductor (13), wherein the first moving contact piece (111) and the second moving contact piece (112) are respectively softly connected to both ends of the conductor (13).

7. The movable contact assembly of claim 5, wherein, The first movable contact (111) and the second movable contact (112) are connected by at least one set of plug-in structures. The plug-in structure includes a plug-in protrusion (141) disposed at one end of the first movable contact (111) near the second movable contact (112) and a plug-in groove (142) disposed at one end of the second movable contact (112) near the first movable contact (111). Alternatively, the plug-in structure includes the plug-in protrusion (141) disposed at one end of the second movable contact (112) near the first movable contact (111) and the plug-in groove (142) disposed at one end of the first movable contact (111) near the second movable contact (112). The plug-in protrusion (141) contacts the sidewall of the plug-in groove (142) to conduct electricity.

8. The movable contact assembly of claim 7, wherein, The insertion protrusion (141) includes a first insertion portion (1411) and a second insertion portion (1412) connected sequentially along the abutment direction (v). The second insertion portion (1412) is bent relative to the first insertion portion (1411) along the rotation axis of the moving contact (11). The first insertion portion (1411) and / or the second insertion portion (1412) are in contact with the sidewall of the insertion groove (142).

9. The movable contact assembly of claim 7, wherein, The insertion protrusion (141) is a spring piece, which abuts against the side wall of the insertion groove (142) to deform, and the spring piece has a tendency to move toward the side wall of the insertion groove (142).

10. A switch, characterized by The device includes an operating mechanism, multiple switching units, and a handle. Each switching unit includes a housing (3), a stationary contact (2), and a moving contact assembly as described in any one of claims 1 to 9. The stationary contact (2) is fixedly installed inside the housing (3), and the moving contact (11) of the moving contact assembly is rotatably installed inside the housing (3). The handle is driven and connected to the moving contacts (11) of the multiple switching units via the operating mechanism, so as to drive the moving contact (11) to close or open with the stationary contact (2).

11. The switch of claim 10, wherein Each of the switch units further includes an arc-extinguishing chamber (4) installed in the housing (3), the arc-extinguishing chamber (4) having an arc-extinguishing channel (41) located on the rotation path of the moving contact (11), the thickness of the arc-extinguishing channel (41) along the rotation axis of the moving contact (11) being greater than the thickness of the moving contact (11) along its rotation axis.

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