A terminal structure for a metering box to prevent miswiring

Abstract

This utility model belongs to the field of metering boxes, and in particular, it is a terminal structure for metering boxes that prevents miswiring. Addressing the lack of an effective anti-miswiring mechanism in existing terminal structures and the limited contact area of ​​traditional terminals when fixing wires, the following solution is proposed: An insulating base with an installation opening on one side; a terminal detachably fitted inside the installation opening, with a plug-in interface inside; and an L-shaped connector removably installed on one side of the terminal. This utility model achieves anti-miswiring through multiple methods. First, by utilizing the differences in the distance between the connector plates at different heights and the crimping blocks from the inner wall of the installation opening, the indicator markings can intuitively remind the user of the correct wiring position. By setting fixed strip blocks at different positions on the inner wall of the installation opening, in conjunction with the plug-in limiting groove, it is ensured that the L-shaped connector can only be inserted into the corresponding installation opening.

Description

Technical Field

[0001] This utility model relates to the field of metering box technology, and in particular to a metering box terminal structure for preventing miswiring. Background Technology

[0002] In the electrical connection of the metering box, the terminal block is a key component for connecting wires to the equipment, and the accuracy and safety of its wiring operation are of paramount importance.

[0003] However, traditional terminal block structures present numerous problems during wiring. On one hand, they lack effective anti-miswiring mechanisms, making it easy for wires to be inserted incorrectly in practice. This not only leads to electrical connection errors, affecting the normal operation of the metering box, but may even cause safety accidents such as short circuits and leakage, threatening equipment and personnel safety. On the other hand, traditional terminal blocks have limited contact area when fixing wires, potentially leading to poor contact, increased resistance, and heat generation, affecting electrical performance and equipment lifespan. Therefore, developing a metering box terminal block structure with anti-miswiring functionality, convenient wiring operation, and guaranteed good electrical connections is of significant practical importance. Utility Model Content

[0004] The purpose of this invention is to address numerous problems inherent in traditional terminal block structures during wiring. On one hand, the lack of an effective anti-miswiring mechanism makes it easy for wires to be inserted incorrectly in practice. This not only leads to electrical connection errors and affects the normal operation of the metering box, but may even cause safety accidents such as short circuits and leakage, threatening equipment and personnel safety. On the other hand, traditional terminal blocks have limited contact area when fixing wires, which may result in poor contact, increased resistance, and heat generation, affecting electrical performance and equipment lifespan. Therefore, this invention proposes a terminal block structure for metering boxes that prevents miswiring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A terminal structure for a metering box designed to prevent miswiring includes an insulating base, with an installation opening on one side of the insulating base;

[0007] A terminal block is detachably fitted inside the mounting port, and the terminal block has a plug-in interface inside;

[0008] An L-shaped connector is removably mounted on one side of the terminal block. An integrally formed connector plate is formed on the inner wall of one side of the L-shaped connector. The height of the connector plate is adjustable to accommodate wires of different thicknesses.

[0009] The height difference of the junction plate ensures that only the L-shaped junction piece matching the wire thickness can be reset, preventing incorrect wiring.

[0010] And fixing screws, used to fix the L-shaped connector and the terminal block in place.

[0011] In one possible design, a connecting assembly is also included, comprising a connecting protrusion integrally formed on one side of the insulating base and a connecting groove formed on the other side of the insulating base, the connecting protrusion and the connecting groove being engageable to connect multiple insulating bases.

[0012] In one possible design, a crimping block is fixedly installed at one end of the contact plate. Multiple contacting protrusions are integrally formed on one side of the crimping block. When the L-shaped contact piece is reset, the crimping block presses against the bent section of the wire and increases the contact area and reduces the resistance through the contacting protrusions.

[0013] In one possible design, the top inner wall of the mounting port is provided with a first threaded hole, and the top of the insulating base is provided with a mounting circular hole that communicates with the first threaded hole.

[0014] The fixing screw is threadedly connected to the first threaded hole. A fixing nut is fixedly installed on the top of the fixing screw. A cross groove is opened on the top of the fixing nut. A third threaded hole is opened on the top of the L-shaped contact piece. A second threaded hole is opened on the top of the terminal block. Both the second threaded hole and the third threaded hole are threadedly connected to the fixing screw.

[0015] In one possible design, a mechanism to prevent miswiring is also included, which comprises:

[0016] A plug-in protrusion is fixedly installed at one end of the L-shaped electrical contact piece, and a plug-in limiting groove is provided on one side of the plug-in protrusion.

[0017] A slotted strip is provided on one side of the inner wall of the mounting port, and a fixing strip block is fixedly installed on one side of the inner wall of the slot.

[0018] The insertion limiting groove engages with the fixing strip block, ensuring that the L-shaped connector can only be inserted into the corresponding mounting port, thus preventing incorrect wiring.

[0019] In one possible design, an indicator mark is provided on one side of the terminal block to indicate the correct wiring position, further preventing incorrect wiring.

[0020] In one possible design, the L-shaped contact plate is removed and reset.

[0021] In one possible design, the bottom of the terminal block is integrally formed with a terminal post, and the bottom of the insulating base is provided with a strip-shaped mounting hole, wherein the terminal post mates with the strip-shaped mounting hole to install the terminal block.

[0022] In this application, if wiring is required during use, the L-shaped connector can be pulled out as a whole using the operating block. At this time, one end of the wire can be bent into an L-shape, the straight section of the L-shape guide is inserted into the inside of the connector, and the bent section abuts against the inner wall of one side of the mounting port. Then, the L-shaped connector is inserted again, the bent section of the wire is pressed tightly by the crimping block, and the contact area is increased by the connecting protrusion. The fixing screw is then screwed into the first threaded hole and the mounting round hole above, so that the fixing screw is screwed into the inside of the second threaded hole and the third threaded hole. In this way, the L-shaped connector and the terminal block can be connected as a whole to complete the power connection process.

[0023] Furthermore, to prevent incorrect wiring, different heights of the connector plates and the distance between the crimping block and the inner wall of the mounting opening are used. If the wire to be connected is thicker, the corresponding connector plate model will be positioned higher on the inner wall of the L-shaped connector plate. This ensures that there is enough space between the bottom of the connector plate and the bottom inner wall of the connector for the wire to be inserted. The distance between the crimping block and the inner wall of the mounting opening is also increased. This ensures that even when the wire is L-shaped, it can be inserted into the gap between the crimping block and the inner wall of the mounting opening. If the wire is inserted incorrectly, the corresponding L-shaped connector plate cannot be reset.

[0024] Meanwhile, the indicator markings can be used to remind users and prevent incorrect wiring. The positions of the fixed strip blocks on the inner wall of the mounting ports are different in different locations. The fixed strip blocks only cooperate with the corresponding plug-in limiting slots, so that the L-shaped connector can only be inserted into the corresponding mounting port. It also ensures that the plug-in protrusion is inserted into the plug-in strip slot. The plug-in limiting slot and the fixed strip block engage, and the plug-in protrusion in different positions cannot be inserted into the wrong plug-in strip slot, thus preventing incorrect wiring.

[0025] Beneficial Effects: This application achieves anti-miswiring through multiple methods. First, by utilizing the varying heights of the connector plates and the differences in distance between the crimping blocks and the inner wall of the mounting opening, only L-shaped connectors matching the wire thickness requirements can be correctly reset, effectively preventing miswiring due to wire thickness mismatch. Second, the indicator markings visually remind users of the correct wiring position, further reducing the possibility of miswiring. Finally, by setting fixed strip blocks at different positions on the inner wall of the mounting opening, which cooperate with the insertion limiting grooves on the L-shaped connectors, it is ensured that the L-shaped connectors can only be inserted into the corresponding mounting openings. Simultaneously, the cooperation between the insertion protrusion and the insertion strip groove also ensures the accuracy of insertion. These multiple measures prevent miswiring from occurring, greatly improving the accuracy and safety of wiring.

[0026] During wiring, the operator simply pulls out the L-shaped connector using the control block, folds one end of the wire into an L-shape and inserts it into the connector, then inserts the L-shaped connector again, and finally connects the L-shaped connector and the terminal block together using the fixing screws to complete the wiring process. This operation method is simple and easy to understand, requiring no complicated tools or operating procedures, greatly improving wiring efficiency and reducing the labor intensity and time costs for operators.

[0027] The crimping block in this application can firmly press the bent section of the wire together, and the contact area is increased by the contact protrusion, effectively improving the electrical connection performance between the wire and the terminal. A good contact area can reduce contact resistance, reduce heat generation, and ensure stable current transmission, thereby improving the overall electrical performance of the metering box and the service life of the equipment.

[0028] Multiple insulating bases are interconnected via connecting components, allowing for flexible combinations to meet specific needs. This facilitates use in metering boxes of varying sizes and layouts, enhancing the product's applicability and versatility. Furthermore, this modular design simplifies installation, maintenance, and replacement, reducing operating costs. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the terminal structure of the metering box for preventing miswiring proposed in this utility model after splicing.

[0030] Figure 2 This is a three-dimensional structural diagram of the insulating base in the terminal structure of the metering box for preventing miswiring proposed in this utility model;

[0031] Figure 3 This is a three-dimensional structural diagram of the insulating base in the terminal structure of the metering box for preventing miswiring proposed in this utility model, taken from a second perspective.

[0032] Figure 4 This is a three-dimensional structural diagram of the wiring terminals and fixing screws in the terminal structure of the metering box for preventing miswiring proposed in this utility model;

[0033] Figure 5 This is an exploded view of the wiring terminals and L-shaped contact pieces in the terminal structure of the metering box for preventing miswiring proposed in this utility model.

[0034] In the diagram: 1. Insulating base; 2. L-shaped connector; 3. Terminal block; 4. Strip mounting hole; 5. Connecting protrusion; 6. Mounting round hole; 7. Insertion strip groove; 8. Mounting port; 9. Fixing strip block; 10. First threaded hole; 11. Connecting groove; 12. Insertion protrusion; 13. Cross groove; 14. Fixing nut; 15. Fixing screw; 16. Operating block; 17. Terminal block; 18. Plug-in interface; 19. Second threaded hole; 20. Indicator mark; 21. Insertion limit groove; 22. Third threaded hole; 23. Connecting plate; 24. Crimping block; 25. Connecting protrusion. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] In one embodiment; reference Figure 1-5 A terminal structure, which mainly consists of multiple insulating bases 1, L-shaped contact pieces 2, wiring terminals 17, fixing screws 15 and other components.

[0037] Multiple insulating bases 1 are interconnected by connecting components. Each insulating base 1 has a connecting protrusion 5 integrally formed on one side and a connecting groove 11 on the other side. The connecting protrusion 5 and the connecting groove 11 engage with each other, thereby enabling flexible combination of multiple insulating bases 1 to adapt to the needs of metering boxes of different sizes and layouts.

[0038] Two symmetrical mounting openings 8 are provided on one side of the insulating base 1. A first threaded hole 10 is provided on the inner top wall of each mounting opening 8. A mounting circular hole 6 communicating with the first threaded hole 10 is provided on the top of the insulating base 1. A terminal block 17 is snapped into the mounting opening 8. A terminal post 3 is integrally formed at the bottom of the terminal block 17. A strip-shaped mounting hole 4 is provided at the bottom of the insulating base 1. The terminal post 3 cooperates with the strip-shaped mounting hole 4 to facilitate the installation and fixation of the terminal block 17 on the insulating base 1. A connector 18 is provided inside the terminal block 17 for inserting wires.

[0039] The L-shaped contact piece 2 is an important component of the limiting assembly, and it is snapped onto one side of the terminal block 17. A contact plate 23 is integrally formed on the inner wall of one side of the L-shaped contact piece 2. A crimping block 24 is fixedly installed at one end of the contact plate 23, and multiple contact protrusions 25 are integrally formed on one side of the crimping block 24. During wiring operations, the L-shaped contact piece 2 is first pulled out as a whole through the operating block 16 fixedly installed on one side. At this time, one end of the wire can be bent into an L-shape, and the straight section of the L-shaped wire is inserted into the connector 18, with the bent section abutting against the inner wall of the mounting opening 8. Then, the L-shaped contact piece 2 is inserted again, and the crimping block 24 will press the bent section of the wire tightly against it. The contact protrusions 25 increase the contact area between the wire and the crimping block 24, thereby improving the stability of the electrical connection, reducing contact resistance, reducing heat generation, and ensuring stable current transmission.

[0040] To prevent incorrect wiring, this structure employs multiple measures. Firstly, it prevents incorrect wiring by varying the heights of the connector plates 23 and the distances of the crimping blocks 24 from the inner wall of the mounting opening 8. If the wire to be connected is thicker, the corresponding connector plate 23 will be positioned higher on one side of the inner wall of the L-shaped connector 2, ensuring sufficient space between the bottom of the connector plate 23 and the bottom inner wall of the insertion interface 18 for the wire insertion. Furthermore, the distance between the crimping block 24 and the inner wall of the mounting opening 8 will also be increased, ensuring that even with the wire in an L-shape, it can be inserted into the gap between the crimping block 24 and the inner wall of the mounting opening 8. If the wire is inserted incorrectly, the corresponding L-shaped connector 2 cannot be reset, thus preventing incorrect wiring.

[0041] On the other hand, an indicator mark 20 is provided on one side of the terminal block 17 to remind the user of the correct wiring position, further preventing incorrect wiring. In addition, the positions of the fixing strip blocks 9 in the inner wall of the mounting opening 8 are different in different locations, and the fixing strip blocks 9 only cooperate with the corresponding insertion limiting grooves 21. One end of the L-shaped connector 2 is fixedly installed with a plug-in protrusion 12, and a plug-in limiting groove 21 is opened on one side of the plug-in protrusion 12. An insertion strip groove 7 is opened on the inner wall of one side of the mounting opening 8, and a fixing strip block 9 is fixedly installed on the inner wall of one side of the insertion strip groove 7. The insertion strip groove 7 engages with the plug-in protrusion 12, and the mounting opening 8 engages with the plug-in limiting groove 21, ensuring that the L-shaped connector 2 can only be inserted into the corresponding mounting opening 8, and guaranteeing that the plug-in protrusion 12 is inserted into the insertion strip groove 7. Plug-in protrusions 12 in different positions cannot be inserted into the wrong insertion strip groove 7, further preventing incorrect wiring.

[0042] This application can be used in the field of measuring boxes, or in other fields applicable to this application.

[0043] In another embodiment; reference Figure 1-5A terminal structure for a metering box designed to prevent miswiring is disclosed. In the field of metering boxes, a power connection assembly for fixing an L-shaped connector 2 and a terminal block 17 is provided inside a first threaded hole 10. The power connection assembly includes a fixing screw 15, which is threaded into the first threaded hole 10. A fixing nut 14 is fixedly mounted on the top of the fixing screw 15, and the nut 14 has a cross-shaped groove 13 on its top for easy screwdriver operation. A third threaded hole 22 is provided on the top of the L-shaped connector 2, and a second threaded hole 19 is provided on the top of the terminal block 17. Both the second threaded hole 19 and the third threaded hole 22 are threaded into the fixing screw 15. After inserting the wire and resetting the L-shaped connector 2, the fixing screw 15 is screwed into the first threaded hole 10 and the mounting hole 6, thus connecting the L-shaped connector 2 and the terminal block 17 into a single unit, completing the power connection process.

[0044] In practical use, the operator selects the appropriate insulating base 1 combination according to the wiring requirements and snaps the terminal block 17 into the mounting port 8. When wiring is required, the above steps are followed. Multiple anti-miswiring mechanisms ensure the accuracy of the wiring. The structure of the L-shaped connector 2 and the crimping block 24 ensures a good electrical connection. Finally, the L-shaped connector 2 and the terminal block 17 are fixed with the fixing screw 15, completing a safe and reliable wiring process.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A miswire prevention meter box terminal structure, characterized by comprising: include: An insulating base (1) is provided with an installation port (8) on one side. The wiring terminal (17) is detachably fitted inside the mounting port (8), and the wiring terminal (17) has a plug-in interface (18) inside. L-shaped connector (2) is removably installed on one side of the terminal block (17). A connector plate (23) is integrally formed on the inner wall of one side of the L-shaped connector (2). The height of the connector plate (23) is adjustable to accommodate wires of different thicknesses. And fixing screws (15) for fixing the L-shaped electrical connector (2) and the terminal block (17) together.

2. The miswire resistant meter box terminal structure of claim 1, wherein, It also includes a connecting assembly, which includes a connecting protrusion (5) integrally formed on one side of the insulating base (1) and a connecting groove (11) formed on the other side of the insulating base (1). The connecting protrusion (5) and the connecting groove (11) can be engaged to connect multiple insulating bases (1).

3. The terminal structure of the metering box for preventing miswiring according to claim 1 or 2, characterized in that, A crimping block (24) is fixedly installed at one end of the electrical contact plate (23). A plurality of electrical contact protrusions (25) are integrally formed on one side of the crimping block (24). When the L-shaped electrical contact piece (2) is reset, the crimping block (24) presses against the bent section of the wire and increases the contact area and reduces the resistance through the electrical contact protrusions (25).

4. The miswire resistant meter box terminal structure of claim 1, wherein, The top inner wall of the mounting port (8) is provided with a first threaded hole (10), and the top of the insulating base (1) is provided with a mounting round hole (6) that communicates with the first threaded hole (10). The fixing screw (15) is threadedly connected to the first threaded hole (10). A fixing nut (14) is fixedly installed on the top of the fixing screw (15). A cross groove (13) is opened on the top of the fixing nut (14). A third threaded hole (22) is opened on the top of the L-shaped connector (2). A second threaded hole (19) is opened on the top of the terminal (17). Both the second threaded hole (19) and the third threaded hole (22) are threadedly connected to the fixing screw (15).

5. The miswire prevention meter box terminal structure of claim 4, wherein, It also includes a mechanism to prevent miswiring, the mechanism comprising: A plug-in protrusion (12) is fixedly installed at one end of the L-shaped electrical contact piece (2), and a plug-in limiting groove (21) is provided on one side of the plug-in protrusion (12). An insertion slot (7) is provided on one side of the inner wall of the mounting port (8), and a fixing strip block (9) is fixedly installed on one side of the inner wall of the insertion slot (7). The insertion limiting groove (21) engages with the fixed strip block (9), so that the L-shaped electrical connector (2) can only be inserted into the corresponding mounting port (8), preventing incorrect wiring.

6. The miswire resistant meter box terminal structure of claim 1, wherein, One side of the terminal block (17) is provided with an indicator mark (20) to indicate the correct wiring position and further prevent incorrect wiring.

7. The miswire resistant meter box terminal structure of claim 1, wherein, An operating block (16) is fixedly installed on one side of the L-shaped electrical contact (2) for operating the removal and resetting of the L-shaped electrical contact (2).

8. The miswire resistant meter box terminal structure of claim 1, wherein, The bottom of the terminal (17) is integrally formed with a terminal post (3), the bottom of the insulating base (1) is provided with a strip-shaped mounting hole (4), and the terminal post (3) cooperates with the strip-shaped mounting hole (4) to mount the terminal (17).

Images