Dual power switch with double contact leading-out structure
By directly welding the two contacts to the same conductive plate in the dual power supply switching switch, the problems of increased contact resistance and inconsistent contacts in the prior art are solved, achieving the effects of simplified structure, improved reliability and extended life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BSB ELECTRICAL APPLIANCES CO LTD
- Filing Date
- 2025-05-31
- Publication Date
- 2026-05-29
AI Technical Summary
In existing dual-power transfer switches, the single-contact structure at the load output end is prone to increased contact resistance due to material fatigue. The multi-conductor plate design is complex and it is not easy to maintain contact consistency, which affects reliability and lifespan, and maintenance is cumbersome.
By directly welding the two contacts onto the same conductive plate and adopting an integrated output conductive plate structure, the assembly steps are simplified, ensuring that the contacts are flush and symmetrical, reducing the connection carrier, and improving processing efficiency and stability.
It achieves a simplified structure with dual breakpoint switching mode, reduces contact resistance, improves conductivity and mechanical reliability, extends service life, and simplifies maintenance operations.
Smart Images
Figure CN224304552U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a dual power supply switching switch with a lead-out structure of dual contacts. Background Technology
[0002] In existing dual-power transfer switches, the load output terminal usually adopts a single-contact structure, or a flexible connection is required to connect the moving contact rod to the output terminal (such as braided copper wire). Although this method can adapt to a certain displacement, long-term use is prone to material fatigue, which can lead to increased contact resistance and even local overheating, resulting in a complex structure and low reliability.
[0003] While some dual-contact designs can achieve dual-break switching, they require soldering the two stationary contacts to independent conductive plates, and then connecting them via an intermediate carrier such as a copper busbar or wire. This type of design not only increases assembly complexity but also introduces additional contact resistance due to the increased number of connection points, reducing conductivity.
[0004] When stationary contacts are distributed on different conductive plates, the installation height and flatness of the two contacts are difficult to maintain in a consistent manner due to processing errors and accumulated assembly tolerances. When the moving contact rod switches, insufficient contact pressure or uneven contact area on one side is prone to occur, leading to arc concentration, accelerated contact erosion, and shortened switch life.
[0005] The design of multiple conductive plates requires additional stamping, welding and leveling processes, which leads to a longer processing cycle and a reduced material utilization rate.
[0006] If the contacts need to be replaced during maintenance, multiple connecting parts need to be disassembled, which is cumbersome and the fasteners are prone to loosening due to repeated disassembly and assembly, which further affects stability.
[0007] In high-frequency switching or vibration environments, the intermediate connecting carrier of the existing structure is prone to displacement or loosening, resulting in poor contact at the contact points, which makes it difficult to meet the requirements of high-reliability application scenarios such as data centers and medical equipment. Summary of the Invention
[0008] To address the aforementioned issues, the present invention aims to provide a dual-power switching switch with a dual-contact lead-out structure. By optimizing the output conductive plate structure, the product achieves a dual-breakpoint switching mode while directly welding the dual contacts onto the same conductive plate, thereby improving processing efficiency and contact consistency.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] A dual-power transfer switch with dual-contact lead-out structure is characterized by: a sheet-shaped output conductive plate mounted on a base; a first mounting groove and a second mounting groove opposite to each other on the base; a partition is longitudinally provided in the first mounting groove; a connecting groove is provided on the outer side of the partition facing away from the first mounting groove; the output conductive plate includes a terminal block, a first mounting plate, a fixing plate, and a second mounting plate integrally formed in sequence; a terminal post is installed at the upper end of the terminal block; an opening for the terminal block to pass through is provided below the partition; the terminal block and the terminal post are installed in the connecting groove; the first mounting plate is located in the first mounting groove; and the second mounting plate is located in the second mounting groove; a moving contact mounting area is formed between the first mounting groove and the second mounting groove; a fixing plate is disposed below the moving contact mounting area; a first load stationary contact and a second load stationary contact are respectively welded onto the first mounting plate and the second mounting plate; the upper surfaces of the first load stationary contact and the second load stationary contact are flush.
[0011] Preferably, the first mounting plate and the second mounting plate are provided with assembly grooves, and the lower ends of the first load stationary contact and the second load stationary contact are fitted into the assembly grooves and welded and fixed.
[0012] Preferably, the fixing plate is recessed downwards and forms a clearance groove between the two mounting plates. The fixing plate has multiple first fixing holes, and bolts are screwed into the first fixing holes to connect the output conductive plate to a base. The base has a receiving groove that cooperates with the fixing plate.
[0013] Preferably, the fixing plate and the two side mounting plates have a rounded transition.
[0014] Preferably, the first load stationary contact and the second load stationary contact are symmetrically arranged on the mounting plates on both sides of the fixed plate.
[0015] Preferably, the terminal block has a locking hole, and the bottom of the terminal post has a locking strip that mates with the locking hole.
[0016] Preferably, the bottom surface of the card strip is an inclined surface.
[0017] Preferably, the terminal block has a second fixing hole, and a screw is screwed into the second fixing hole to connect the terminal to the terminal block.
[0018] The present invention adopts the above technical solution and has the following beneficial effects:
[0019] ① The first and second load stationary contacts are directly welded to the mounting plate of the same conductive plate to achieve a dual-breakpoint switching mode. No additional connecting carrier is required, which simplifies the structure, reduces assembly steps, facilitates processing, and improves production efficiency.
[0020] ② The two contacts are symmetrically distributed and their upper surfaces are flush and of the same height to ensure contact stability when the moving contact rod switches.
[0021] ③ The output conductive plate and base are designed to fit together, making installation easy, enhancing the overall structural strength, and the clearance slot optimizes the space layout, resulting in a compact structure. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the assembly of the output conductive plate and the base.
[0023] Figure 2 This is a schematic diagram showing the installation of the terminal block and dual contacts on the output conductive plate.
[0024] Figure 3 This is a three-dimensional structural diagram of the output conductive plate.
[0025] Figure 4 This is a three-dimensional structural diagram of the terminal block.
[0026] Figure 5 This is a schematic diagram showing the arrangement of the receiving slots on the base.
[0027] Figure 6 This is a schematic diagram showing the arrangement of the connecting slots on the base. Detailed Implementation
[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 utility model according to the specific circumstances.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] like Figures 1-6 The diagram illustrates a dual-power transfer switch with dual-contact lead-out structure, comprising a sheet-shaped output conductive plate 1 mounted on a base 12. The base 12 has opposing first mounting grooves 18 and 19. A partition 20 is longitudinally arranged within the first mounting groove 18, and a connecting groove 21 is provided on the outer side of the partition 20 facing away from the first mounting groove 18. The output conductive plate 1 includes a terminal block 2, a first mounting plate 3, a fixing plate 4, and a second mounting plate 5 integrally formed in sequence. A terminal post 6 is mounted on the upper end of the terminal block 2, and a connection groove 21 is provided below the partition 20. An opening 22 is provided for the terminal block 2 to pass through. The terminal block 2 and the terminal post 6 are installed in the connecting groove 21. The first mounting plate 3 is located in the first mounting groove 18, and the second mounting plate 5 is located in the second mounting groove 19. A moving contact mounting area is formed between the first mounting groove 18 and the second mounting groove 19. A fixing plate 4 is located below the moving contact mounting area. A first load stationary contact 7 and a second load stationary contact 8 are respectively welded onto the first mounting plate 3 and the second mounting plate 5. The upper surfaces of the first load stationary contact 7 and the second load stationary contact 8 are flush.
[0034] In the above technical solution, two stationary contacts are placed on the same output conductive plate, and then the output conductive plate is installed on the base. The one-piece molded conductive plate eliminates the multi-part splicing process, reduces assembly complexity, and simplifies the structure; the flush upper surfaces of the double contacts ensure uniform contact pressure when the moving contact rod switches, reducing the risk of arcing and making the contact more stable; the one-piece conductive plate has no intermediate connecting carrier, reducing contact resistance and energy loss, and improving conductivity; the design of the output conductive plate and the base makes installation simple, enhances the overall structural strength, and the clearance slot optimizes the space layout, resulting in a compact structure.
[0035] Furthermore, the first mounting plate 3 and the second mounting plate 5 are provided with assembly grooves 9, and the lower ends of the first load stationary contact 7 and the second load stationary contact 8 are fitted into the assembly grooves 9 and welded and fixed. In this technical solution, the assembly groove guides the installation position of the contact, avoids welding misalignment, improves the symmetry and height consistency of the contact, and ensures accurate positioning; the contact area with the assembly groove is increased, the welding is more secure, the risk of loosening caused by long-term vibration is reduced, and the welding strength is enhanced.
[0036] Furthermore, the fixing plate 4 is recessed downwards to form a clearance groove 10 between it and the two mounting plates on both sides. The fixing plate 4 has multiple first fixing holes 11, and bolts 17 are screwed into these holes 11 to connect the output conductive plate 1 to a base 12. The base 12 has a receiving groove 13 that mates with the fixing plate 4. In this technical solution, the clearance groove provides space for the movement of the moving contact rod, avoiding mechanical interference and optimizing space. The bolt fixing method combined with the base receiving groove enhances the overall structure's impact and seismic resistance, improving installation stability.
[0037] Furthermore, the fixing plate 4 has a rounded transition with the mounting plates on both sides. In this technical solution, the rounded transition reduces stress concentration at the bending points of the conductive plate, preventing material fatigue cracking; the smooth transition reduces local resistance and avoids local overheating of the conductive plate.
[0038] To ensure uniform current distribution.
[0039] Furthermore, the first load stationary contact 7 and the second load stationary contact 8 are symmetrically arranged on the mounting plates on both sides of the fixed plate 4. In this technical solution, the symmetrical layout ensures that the moving contact rod is subjected to balanced force, resulting in smoother switching action.
[0040] Furthermore, the terminal block 2 has a locking hole 14, and the bottom of the terminal 6 has a locking strip 15 that mates with the locking hole 14. In this technical solution, the locking strip and the locking hole cooperate to initially fix the terminal, simplifying the installation process and enabling rapid pre-positioning.
[0041] Furthermore, the bottom surface of the retaining strip 15 is beveled. In this technical solution, the beveled design facilitates the retaining strip sliding into the retaining hole, reduces assembly resistance, minimizes installation damage, and serves as a guide.
[0042] Furthermore, a second fixing hole 16 is provided on the terminal block 2, and a screw is screwed into the second fixing hole 16 to connect the terminal 6 to the terminal block 2. In this technical solution, the locking strip is pre-positioned and locked with the screw to prevent the terminal from loosening due to vibration or current impact; the screw connection facilitates the disassembly and replacement of the terminal, reducing maintenance costs.
[0043] In this specific embodiment, to address the inconvenience of the contact lead-out structure in existing dual-power transfer switches, the above solution sets the two stationary contacts on the same output conductive plate, and then installs the output conductive plate onto the base, reducing welding and assembly steps and improving production efficiency; the integrated structure reduces material waste, facilitates maintenance, extends product lifespan, and reduces costs; and through symmetrical and reinforced designs, it improves conductivity stability and mechanical reliability.
[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.
Claims
1. A dual-power transfer switch with a dual-contact lead-out structure, characterized in that: The device includes a sheet-shaped output conductive plate (1) mounted on a base (12). The base (12) has opposing first mounting grooves (18) and second mounting grooves (19). A partition (20) is longitudinally arranged within the first mounting groove (18), and a connecting groove (21) is provided on the outer side of the partition (20) facing away from the first mounting groove (18). The output conductive plate (1) includes a terminal block (2), a first mounting plate (3), a fixing plate (4), and a second mounting plate (5) integrally formed in sequence. A terminal post (6) is mounted on the upper end of the terminal block (2), and a passage for the terminal block (2) to pass through is provided below the partition (20). An opening (22) is provided, a terminal block (2) and a terminal post (6) are installed in a connecting groove (21), a first mounting plate (3) is located in a first mounting groove (18), and a second mounting plate (5) is located in a second mounting groove (19); a moving contact mounting area is formed between the first mounting groove (18) and the second mounting groove (19), and a fixing plate (4) is located below the moving contact mounting area; a first load stationary contact (7) and a second load stationary contact (8) are respectively welded on the first mounting plate (3) and the second mounting plate (5), and the upper surfaces of the first load stationary contact (7) and the second load stationary contact (8) are flush.
2. The dual-power switching switch with dual-contact lead-out structure according to claim 1, characterized in that: The first mounting plate (3) and the second mounting plate (5) are provided with assembly grooves (9), and the lower ends of the first load stationary contact (7) and the second load stationary contact (8) are fitted into the assembly grooves (9) and welded and fixed.
3. The dual-power switching switch with dual-contact lead-out structure according to claim 2, characterized in that: The fixing plate (4) is recessed downward and forms a clearance groove (10) between the two mounting plates. The fixing plate (4) has multiple first fixing holes (11). Bolts (17) are screwed into the first fixing holes (11) to connect the output conductive plate (1) to the base (12). The base (12) has a receiving groove (13) that cooperates with the fixing plate (4).
4. The dual-power switching switch with dual-contact lead-out structure according to claim 3, characterized in that: The fixed plate (4) and the mounting plates on both sides have a rounded transition.
5. The dual-power switching switch with dual-contact lead-out structure according to claim 2, characterized in that: The first load stationary contact (7) and the second load stationary contact (8) are symmetrically arranged on the mounting plates on both sides of the fixing plate (4).
6. The lead-out structure of a dual-power switching switch with dual contacts according to claim 1, characterized in that: The terminal block (2) has a locking hole (14), and the bottom of the terminal post (6) has a locking strip (15) that cooperates with the locking hole (14).
7. The dual-power switching switch with dual-contact lead-out structure according to claim 6, characterized in that: The bottom surface of the card strip (15) is an inclined surface.
8. The lead-out structure of a dual-power switching switch with dual contacts according to claim 6, characterized in that: The terminal block (2) has a second fixing hole (16), and screws are screwed into the second fixing hole (16) to connect the terminal post (6) to the terminal block (2).