End cap mounting structure and electric energy meter

Abstract

The utility model relates to electric energy meter technical field, and disclose a kind of end cap mounting structure and electric energy meter, comprising: outer shell, protection front plate, end cap part, side concave clamping plate, guide plate, L-shaped outer plate, side convex clamping plate, guide rod, fixed round plate and extrusion spring, outer shell front is provided with protection front plate, protection front plate lower rotationally connects end cap part, and end cap part two sides install side concave clamping plate;Guide plate is slidably connected in the two sides of outer shell, and the front of guide plate is rotationally connected L-shaped outer plate, and the short side inside of L-shaped outer plate is installed side convex clamping plate, and side convex clamping plate is connected with side concave clamping plate;Guide rod is set to the back of guide plate, and fixed round plate is sleeved on the surface center of guide rod, and extrusion spring is sleeved on the rear end of the surface of guide rod, the structure can realize end cap disassembly without screwdriver and other complex tools, extrusion spring can provide elastic buffer, prevent end cap loosening, compensate small error, guarantee the normal operation of electric energy meter internal element.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter technology, specifically to an end cover mounting structure and an electricity meter. Background Technology

[0002] As a core device for measuring electricity consumption, electricity meters are widely used in residential buildings, industrial plants, and commercial buildings. Their casings must meet both protection and operational requirements: on the one hand, they must isolate dust, moisture, and accidental impacts from the external environment to protect the internal metering chips and wiring terminals from damage and ensure metering accuracy; on the other hand, during the installation, initialization, periodic calibration, fault repair, or verification of electricity consumption data, staff need to frequently open and close the end cover. Therefore, the ease of use and stability of the end cover installation structure are crucial to the operation and maintenance efficiency of the electricity meter throughout its entire life cycle.

[0003] The existing end-cap installation structure of electricity meters has significant defects: First, most end caps are fixed with multiple screws, requiring workers to use screwdrivers to disassemble or tighten each screw individually. When the electricity meter is installed in confined spaces such as distribution boxes, the operating range of tools is limited, leading to cumbersome and time-consuming disassembly and assembly, and also increasing the risk of component loss or installation errors due to slipping screws. Second, while some improved snap-fit ​​structures eliminate screws, the snaps are mostly made of rigid plastic or metal, lacking sustained pre-tightening force. After long-term use, the snaps are prone to deformation or wear due to material fatigue caused by environmental vibration or temperature cycling, increasing the gap between the end cap and the outer casing. Dust and moisture can easily penetrate and corrode internal components. Furthermore, a loose end cap may produce abnormal noise under slight external vibrations, affecting the stability and protective effect of the electricity meter. Therefore, this paper proposes an end-cap installation structure and an electricity meter. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an end cap mounting structure and an energy meter to solve the aforementioned technical problems that lead to cumbersome and time-consuming end cap assembly and disassembly steps.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an end cap mounting structure and an electricity meter, comprising:

[0006] The outer casing and a protective front panel located on the upper front of the outer casing, with an end cap portion rotatably connected to the lower part of the protective front panel, and side recessed plates installed at the center of both sides of the end cap portion.

[0007] The guide plate is slidably connected to the lower two sides of the outer shell, and an L-shaped outer plate is rotatably connected to the front of the guide plate. A side protruding plate is installed on the inner side of the short side of the L-shaped outer plate, and the side protruding plate and the side concave plate are inserted and connected.

[0008] A guide rod is provided on the back of the guide plate of the guide rod, and a fixed circular plate is sleeved on the center of the surface of the guide rod. The fixed circular plate is connected to the inner wall of the outer shell, and a compression spring is sleeved on the rear end of the surface of the guide rod. The front and rear ends of the compression spring are respectively attached to the back of the fixed circular plate and the rear end of the guide rod.

[0009] When the end cover is rotated, the side recessed plate rotates, causing the end cover to fit against the outer shell and the protective front plate;

[0010] The guide plate is pushed to move out of the outer shell, the guide plate drives the guide rod, the guide rod squeezes the compression spring, and the compression spring is in a compressed state;

[0011] Rotate the L-shaped outer plate to adjust the side convex plate to the alignment angle that matches the side concave plate of the end cap.

[0012] Release the guide plate, squeeze the spring to move the guide rod into the outer shell, the guide plate moves the L-shaped outer plate, so that the side convex plate is inserted into the side concave plate, so that the side convex plate and the side concave plate are tightly inserted, and the installation of the end cover is completed.

[0013] When it is necessary to disassemble the end cover, push the guide plate to move out of the outer shell. The guide plate drives the guide rod, which in turn squeezes the corresponding compression spring. At the same time, the guide plate drives the L-shaped outer plate, which in turn causes the side convex clamping plate and the side concave clamping plate to separate. Then, rotate the end cover. The end cover drives the side concave clamping plate to rotate, thus disassembling the end cover.

[0014] Preferably, the lower front ends of both sides of the protective front plate are provided with side circular holes, and the end cap is rotatably connected to the protective front plate through the side circular holes. The rotatable connection between the end cap and the protective front plate via the side circular holes provides stable rotational support for the end cap, allowing it to rotate flexibly. This lays the structural foundation for subsequent protective and locking functions based on the end cap, ensuring the smoothness and stability of the rotation process.

[0015] Preferably, upper connecting plates are installed on both sides of the front end of the upper surface of the end cap, and an outer pull handle is inserted and connected to the outer front end of the upper connecting plate. The upper connecting plate provides a reliable mounting carrier and motion guide for the outer pull handle. The insertion and connection structure between the outer pull handle and the upper connecting plate facilitates the operator to indirectly move or adjust the relevant structures of the end cap by holding and manipulating the outer pull handle, effectively improving the convenience of operating the end cap.

[0016] Preferably, a fixing rod is installed on the inner side of the outer pull handle, and the inner end of the fixing rod extends inward through the outer side of the upper connecting plate and connects to a side cylinder. The side cylinder and the side hole are positioned in a corresponding manner. Through the transmission and cooperation between the outer pull handle and the fixing rod, the movement trajectory and position of the side cylinder can be precisely controlled. The positional correspondence between the side cylinder and the side hole provides a structural basis for subsequent mating and disassembly actions, ensuring the accuracy and reliability of the mating process and avoiding mating failure due to positional deviation.

[0017] Preferably, a return spring is sleeved on the outer surface of the fixing rod, and the outer and inner ends of the return spring are respectively in contact with the inner wall of the upper connecting plate and the outer end of the side cylinder. The return spring always maintains a contact state with the inner wall of the upper connecting plate and the outer end of the side cylinder, which can provide continuous elastic support for the side cylinder, ensuring that the side cylinder maintains a stable position under the action of no external force, and preventing its arbitrary movement from affecting the fitting accuracy with the side hole.

[0018] Preferably, the inner cavity of the outer shell is further provided with a side panel, a display panel and a main control circuit board, and a limiting rod is inserted and connected to the center of the front of the guide plate. A compression spring is provided between the inner end of the limiting rod and the inner wall of the guide plate, and a rotating shaft is rotatably connected between the guide plate and the L-shaped outer plate. The outer end of the limiting rod is inserted and connected to the surface of the rotating shaft.

[0019] The compression spring's driving action on the limiting rod ensures a smooth and continuous outward movement of the limiting rod, resulting in a tighter fit between the limiting rod and the corresponding part of the rotating shaft. This further enhances the reliability of the rotating shaft's limiting action. Moreover, this structural fit does not add any additional complex components and does not affect the normal installation and operation of the internal cavity side panels, display components, and main control circuit board of the housing, thus balancing structural simplicity and overall component compatibility.

[0020] Preferably, the outer surface of the outer shell and the guide plate has a guide groove at its center front end, and adjacent guide grooves are connected. By opening guide grooves at specific positions on the outer shell and the guide plate and ensuring that adjacent guide grooves are connected, a continuous and unified guide path can be formed, avoiding jamming or deviation due to channel interruption when subsequent components move. This lays a stable foundation for the orderly cooperation of components in the overall structure and improves the smoothness of structural operation.

[0021] Preferably, a guide block is slidably connected to the outer end of the guide groove, and the inner side of the guide block is connected to the rear end of the limiting rod through the guide groove. This sliding connection between the guide groove and the guide block ensures that the guide block always moves along the trajectory of the guide groove during movement, avoiding deviation. Simultaneously, the guide block drives the limiting rod through the guide groove, transmitting the smooth movement of the guide block to the limiting rod, ensuring accurate movement direction and stable movement of the limiting rod. This further improves the controllability of component movement in the overall structure, reduces structural failures caused by component movement deviations, and enhances the operational reliability of the overall structure.

[0022] Compared with the prior art, this utility model provides an end cap mounting structure and an energy meter, which has the following beneficial effects:

[0023] This end cap mounting structure and energy meter have an end cap that is rotatably connected to the underside of the protective front plate. With the insertion connection structure of the concave and convex side plates, there is no need to rely on complex tools such as screwdrivers. The separation or connection of the convex and concave side plates can be controlled simply by sliding the guide plate or rotating the L-shaped outer plate. At the same time, the compression spring on the back of the guide rod provides elastic cushioning during disassembly and assembly, reducing hard collisions between components and making the disassembly and assembly operations smoother.

[0024] A compression spring is sleeved at the rear end of the guide rod, with its front and rear ends respectively attached to the fixed circular plate and the guide rod. It can continuously apply elastic force to the guide plate, ensuring that the side convex clamping plate on the L-shaped outer plate and the side concave clamping plate on the end cover remain tightly inserted, preventing the end cover from loosening due to vibration, temperature changes, or slight external force during long-term use. At the same time, this elastic pre-tightening structure can compensate for minor errors generated during component processing or assembly, ensuring the fit between the end cover and the outer casing, effectively preventing dust and moisture from entering the interior of the outer casing, and ensuring the normal operation of the internal components of the electricity meter. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the detachable end cap structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the end cap portion of this utility model;

[0028] Figure 4 Appendix to this utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is an enlarged cross-sectional view of the outer shell of this utility model.

[0030] Figure 6This is a schematic diagram of the separation structure of the guide plate and the L-shaped outer plate of this utility model.

[0031] In the diagram: 1. Outer shell; 2. Protective front plate; 3. End cap; 4. Side circular hole; 5. Upper connecting plate; 6. Outer pull handle; 7. Fixing rod; 8. Side cylinder; 9. Return spring; 10. Side concave clamping plate; 11. Guide plate; 12. L-shaped outer plate; 13. Side convex clamping plate; 14. Guide rod; 15. Fixing circular plate; 16. Compression spring; 17. Rotating shaft; 18. Guide groove; 19. Guide block; 20. Limiting rod; 21. Compression spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] This utility model provides a technical solution, an end cap mounting structure and an electricity meter, including: Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The outer shell 1 and the protective front plate 2 disposed on the upper part of the front of the outer shell 1, and the lower part of the protective front plate 2 is rotatably connected to the end cover portion 3, and the side recessed plates 10 are installed at the center of both sides of the end cover portion 3.

[0034] The guide plate 11 is slidably connected to the lower parts of both sides of the outer shell 1, and the front of the guide plate 11 is rotatably connected to the L-shaped outer plate 12, and a side protruding card plate 13 is installed on the inner side of the short side of the L-shaped outer plate 12, and the side protruding card plate 13 is inserted and connected to the side concave card plate 10.

[0035] A guide rod 14 is disposed on the back of the guide plate 11 of the guide rod 14, and a fixed circular plate 15 is sleeved on the center of the surface of the guide rod 14. The fixed circular plate 15 is connected to the inner wall of the outer shell 1, and a compression spring 16 is sleeved on the rear end of the surface of the guide rod 14. The front and rear ends of the compression spring 16 are respectively attached to the back of the fixed circular plate 15 and the rear end of the guide rod 14.

[0036] When the end cap portion 3 is rotated, the side recessed retaining plate 10 rotates, so that the end cap portion 3 fits into the outer shell 1 and the protective front plate 2;

[0037] The guide plate 11 is pushed to move out of the outer shell 1. The guide plate 11 drives the guide rod 14, and the guide rod 14 squeezes the compression spring 16, so the compression spring 16 is in a compressed state.

[0038] Rotate the L-shaped outer plate 12 to adjust the side convex plate 13 to the alignment angle that matches the side concave plate 10 of the end cap part 3;

[0039] Release the guide plate 11, squeeze the spring 16 to drive the guide rod 14 to move into the outer shell 1, the guide plate 11 drives the L-shaped outer plate 12, so that the side convex plate 13 is inserted into the side concave plate 10, so that the side convex plate 13 and the side concave plate 10 are tightly inserted, and the installation of the end cover part 3 is completed.

[0040] When it is necessary to disassemble the end cap 3, push the guide plate 11 to move out of the outer shell 1. The guide plate 11 drives the guide rod 14, and the guide rod 14 squeezes the compression spring 16. At the same time, the guide plate 11 drives the L-shaped outer plate 12, and the L-shaped outer plate 12 drives the side convex clamping plate 13 to separate from the side concave clamping plate 10. Then rotate the end cap 3, and the end cap 3 drives the side concave clamping plate 10 to rotate, thereby realizing the disassembly of the end cap 3.

[0041] The tight insertion and cooperation of the convex side plate 13 and the concave side plate 10, combined with the limiting effect of the guide rod 14 and the fixed circular plate 15 on the guide plate 11, can prevent the end cover part 3 from being displaced or loosened due to vibration during the transportation, installation or use of the electricity meter, thus ensuring the stability of the overall structure of the electricity meter.

[0042] The rotating connection design between the L-shaped outer plate 12 and the guide plate 11 allows the side convex plate 13 to be flexibly adjusted by rotating the L-shaped outer plate 12. Even if the position of the side concave plate 10 deviates slightly during the rotation of the end cap 3, precise docking can be achieved by adjusting the angle of the side convex plate 13. Combined with the tight insertion driven by the compression spring 16, the structural adaptability and docking accuracy are further improved.

[0043] Please see Figure 2 The protective front plate 2 has side circular holes 4 on both sides at its lower front end, and the end cap part 3 is rotatably connected to the protective front plate 2 through the side circular holes 4. The end cap part 3 rotates relative to the protective front plate 2 through the side circular holes 4; the side circular holes 4 realize the rotatable connection between the end cap part 3 and the protective front plate 2, providing stable rotation support for the end cap part 3, enabling the end cap part 3 to flexibly carry out rotational movements, laying the structural foundation for subsequent protective and locking functions based on the end cap part 3, and ensuring the smoothness and stability of the rotation process.

[0044] Please see Figure 3The upper surface of the end cap portion 3 is provided with upper connecting plates 5 on both sides of the front end, and an outer pull handle 6 is inserted and connected to the outer front end of the upper connecting plate 5. Under the action of external force, the outer pull handle 6 can be inserted and pulled relative to the upper connecting plate 5; when no external force is applied, the outer pull handle 6 remains inserted at the outer front end of the upper connecting plate 5. The upper connecting plate 5 provides a reliable mounting carrier and movement guide for the outer pull handle 6. The insertion and connection structure between the outer pull handle 6 and the upper connecting plate 5 makes it convenient for operators to indirectly move or adjust the relevant structures of the end cap portion 3 by holding and manipulating the outer pull handle 6, effectively improving the convenience of operating the end cap portion 3.

[0045] Please see Figure 4 A fixing rod 7 is installed on the inner side of the outer pull handle 6, and the inner end of the fixing rod 7 extends inward through the outer side of the upper connecting plate 5 and connects to a side cylinder 8. The side cylinder 8 and the side hole 4 are correspondingly positioned. The outer pull handle 6 drives the fixing rod 7 to move outward, and the fixing rod 7 drives the side cylinder 8 to move synchronously, so that the side cylinder 8 moves from inside the side hole 4 to the inner wall of the upper connecting plate 5. Through the transmission cooperation between the outer pull handle 6 and the fixing rod 7, the movement trajectory and position of the side cylinder 8 can be precisely controlled. The positional correspondence between the side cylinder 8 and the side hole 4 provides a structural premise for the subsequent insertion and separation of the two, ensuring the accuracy and reliability of the cooperation process and avoiding cooperation failure due to positional deviation.

[0046] A return spring 9 is fitted onto the outer surface of the fixed rod 7, and the outer and inner ends of the return spring 9 are respectively in contact with the inner wall of the upper connecting plate 5 and the outer end of the side cylinder 8. When the side cylinder 8 is driven to move outward by an external force, the side cylinder 8 compresses the return spring 9; when the external force on the side cylinder 8 disappears, the return spring 9 releases its elastic force, causing the side cylinder 8 to return to its original position inward, and the side cylinder 8 drives the fixed rod 7 to return to its original position synchronously, and the fixed rod 7 drives the outer pull handle 6 to return to its original position synchronously; the return spring 9 always maintains a contact state with the inner wall of the upper connecting plate 5 and the outer end of the side cylinder 8, which can provide continuous elastic support for the side cylinder 8, ensuring that the side cylinder 8 maintains a stable position under non-external force, and avoiding its arbitrary movement from affecting the fitting accuracy with the side circular hole 4.

[0047] Please see Figure 1 , Figure 5 and Figure 6 The inner cavity of the outer shell 1 is also provided with a side panel, a display panel and a main control circuit board. A limiting rod 20 is inserted and connected to the center of the front of the guide plate 11. A compression spring 21 is provided between the inner end of the limiting rod 20 and the inner wall of the guide plate 11. A rotating shaft 17 is rotatably connected between the guide plate 11 and the L-shaped outer plate 12. The outer end of the limiting rod 20 is inserted and connected to the surface of the rotating shaft 17.

[0048] The L-shaped outer plate 12 drives the rotating shaft 17 to reset on the guide plate 11; the compression spring 21 drives the limiting rod 20 to move outward from the guide plate 11; the limiting rod 20 is inserted into the corresponding position of the rotating shaft 17 to limit the rotating shaft 17.

[0049] The driving action of the compression spring 21 on the limiting rod 20 can make the outward movement of the limiting rod 20 smooth and have a continuous force, making the insertion fit between the limiting rod 20 and the corresponding part of the rotating shaft 17 tighter, further improving the reliability of limiting the rotating shaft 17. Moreover, this structure does not add any additional complex parts and does not affect the normal installation and operation of the inner cavity side panel, display panel and main control circuit board of the outer shell 1, taking into account the simplicity of the structure and the compatibility of the overall components.

[0050] Please see Figure 5 and Figure 6 The outer shell 1 and the guide plate 11 have guide grooves 18 at their center front ends, and adjacent guide grooves 18 are connected. The presence of guide grooves 18 at the center front ends of the outer shell 1 and the guide plate 11 ensures that adjacent guide grooves 18 are connected, providing a basic channel for the movement of subsequent mating components. By creating guide grooves 18 at specific locations on the outer shell 1 and the guide plate 11 and ensuring that adjacent guide grooves 18 are connected, a continuous and unified guiding path can be formed. This prevents subsequent components from jamming or shifting due to channel interruption, laying a stable foundation for the orderly coordination of components in the overall structure and improving the smoothness of structural operation.

[0051] A guide block 19 is slidably connected to the outer end of the guide groove 18, and the inner side of the guide block 19 is connected to the rear end of the limiting rod 20 through the guide groove 18. The guide block 19 slides at the outer end of the guide groove 18, and the inner side of the guide block 19 drives the limiting rod 20 to move through the guide groove 18. The sliding connection between the guide groove 18 and the guide block 19 ensures that the guide block 19 always moves along the trajectory of the guide groove 18 during movement, avoiding deviation. At the same time, the guide block 19 drives the limiting rod 20 to move through the guide groove 18, which can transmit the smooth movement of the guide block 19 to the limiting rod 20, ensuring the precise movement direction and stable movement of the limiting rod 20, further improving the controllability of the movement of components in the overall structure, reducing structural failures caused by component movement deviations, and enhancing the operational reliability of the overall structure.

[0052] This solution: Under the action of external force, hold the outer pull handle 6, the outer pull handle 6 drives the fixed rod 7 to move outward, the fixed rod 7 drives the side cylinder 8 to move synchronously, the side cylinder 8 squeezes the return spring 9, so that the side cylinder 8 enters the inner wall of the upper connecting plate 5. After the side cylinder 8 is aligned with the side circular hole 4, release the outer pull handle 6, the side cylinder 8 enters the interior of the side circular hole 4 under the action of the return spring 9; rotate the end cover part 3, the end cover part 3 drives the side concave plate 10 to rotate, so that the end cover part 3 fits with the outer shell 1 and the protective front plate 2;

[0053] Push the guide plate 11 to move outward from the outer shell 1. The guide plate 11 drives the guide rod 14, which compresses the compression spring 16. The L-shaped outer plate 12 rotates on the guide plate 11 via the rotating shaft 17. The L-shaped outer plate 12 drives the side convex plate 13 to adjust to the alignment angle that matches the side concave plate 10. The compression spring 21 drives the limiting rod 20 to move outward from the guide plate 11. The limiting rod 20 is inserted into the corresponding position of the rotating shaft 17 to limit the rotation shaft 17. Release the guide plate 11. The compression spring 16 drives the guide rod 14 to move inward from the outer shell 1. The guide rod 14 drives the guide plate 11, which drives the L-shaped outer plate 12. The L-shaped outer plate 12 drives the side convex plate 13, so that the side convex plate 13 is inserted into the side concave plate 10, completing the installation of the end cap part 3.

[0054] When it is necessary to disassemble the end cap 3, push the guide block 19. The guide block 19 slides at the outer end of the guide groove 18. The inner side of the guide block 19 drives the limiting rod 20 to move through the guide groove 18, so that the limiting rod 20 is separated from the rotating shaft 17. Push the guide plate 11 to move out of the outer shell 1. The guide plate 11 drives the guide rod 14. The guide rod 14 squeezes the compression spring 16. At the same time, the guide plate 11 drives the L-shaped outer plate 12. The L-shaped outer plate 12 drives the side protruding clamping plate 13, so that the side protruding clamping plate 13 is separated from the side concave clamping plate 10.

[0055] Hold the outer pull handle 6, the outer pull handle 6 drives the fixing rod 7 to move outward, the fixing rod 7 drives the side cylinder 8 to move synchronously, the side cylinder 8 squeezes the return spring 9, so that the side cylinder 8 moves outward from the side hole 4 and enters the inner wall of the upper connecting plate 5, thereby realizing the disassembly of the end cover part 3.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An end cap mounting structure, characterized in that, include: The outer shell (1) and the protective front plate (2) provided on the upper part of the front of the outer shell (1) are provided. The lower part of the protective front plate (2) is rotatably connected to the end cap (3), and the side recessed plates (10) are installed at the center of both sides of the end cap (3). The guide plate (11) is slidably connected to the lower sides of the outer shell (1), and the front of the guide plate (11) is rotatably connected to the L-shaped outer plate (12), and a side protruding plate (13) is installed on the inner side of the short side of the L-shaped outer plate (12), and the side protruding plate (13) is inserted and connected to the side concave plate (10). A guide rod (14) is provided on the back of the guide plate (11) of the guide rod (14), and a fixed circular plate (15) is sleeved on the center of the surface of the guide rod (14). The fixed circular plate (15) is connected to the inner wall of the outer shell (1), and a compression spring (16) is sleeved on the rear end of the surface of the guide rod (14). The front and rear ends of the compression spring (16) are respectively attached to the back of the fixed circular plate (15) and the rear end of the guide rod (14).

2. The end cap mounting structure according to claim 1, characterized in that: The front protective plate (2) has side circular holes (4) at the lower front ends on both sides, and the end cap (3) is rotatably connected to the front protective plate (2) through the side circular holes (4).

3. The end cap mounting structure according to claim 2, characterized in that: The upper surface of the end cap portion (3) is provided with upper connecting plates (5) on both sides of the front end, and an outer pull handle (6) is inserted and connected to the outer front end of the upper connecting plate (5).

4. The end cap mounting structure according to claim 3, characterized in that: A fixing rod (7) is installed on the inner side of the outer pull handle (6), and the inner end of the fixing rod (7) extends inward through the outer side of the upper connecting plate (5) and is connected to a side cylinder (8). The side cylinder (8) and the side hole (4) are in a corresponding positional relationship.

5. The end cap mounting structure according to claim 4, characterized in that: The outer surface of the fixed rod (7) is fitted with a reset spring (9), and the outer end and inner end of the reset spring (9) are respectively attached to the inner wall of the upper connecting plate (5) and the outer end of the side cylinder (8).

6. An electricity meter, characterized in that: The energy meter includes an end cap mounting structure as described in any one of claims 1-5, the energy meter includes an outer shell (1), and the inner cavity of the outer shell (1) is further provided with a side panel, a display panel and a main control circuit board, and a limiting rod (20) is inserted and connected to the center of the front of the guide plate (11), a compression spring (21) is provided between the inner end of the limiting rod (20) and the inner wall of the guide plate (11), and a rotating shaft (17) is rotatably connected between the guide plate (11) and the L-shaped outer plate (12), and the outer end of the limiting rod (20) is inserted and connected to the surface of the rotating shaft (17).

7. An electricity meter according to claim 6, characterized in that: The outer shell (1) and the guide plate (11) have guide grooves (18) at the center front end of their outer surfaces, and adjacent guide grooves (18) are connected to each other.

8. An electricity meter according to claim 7, characterized in that: The outer end of the guide groove (18) is slidably connected to a guide block (19), and the inner side of the guide block (19) is connected to the rear end of the limiting rod (20) through the guide groove (18).

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