An electric energy meter housing

Abstract

The utility model discloses an electric energy meter shell relates to electric energy meter technical field, including bottom shell, upper cover, terminal cover and main control MCU chip, upper cover is fixed in bottom shell, and terminal cover is rotatoryly connected with upper cover. Upper cover both ends are equipped with the connecting concave surface, and there are the pivot, the closing cover positioning hole, the opening cover positioning hole and the signal switch connected with main control MCU, and the hook ring that cooperates with the pivot is equipped with the hook ring both ends of terminal cover, and there is the positioning column on the hook ring. When terminal cover covers, positioning column is connected with closing cover positioning hole, and when opening, positioning column is connected with opening cover positioning hole and triggers signal switch. The accurate positioning is realized with the cooperation of double positioning holes and positioning column, prevents the false operation of external force, guarantees the protection and operating stability, and the opening cover triggers signal switch and makes MCU real -time monitoring state, and early warning unauthorized opening, and the security and measurement risk are prevented, and the positioning and monitoring structure integration, and the existing structure does not need to change greatly, and the processing cost is low, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter technology, specifically to an electricity meter casing. Background Technology

[0002] As the protective carrier of the core component of the electricity meter, the casing of the electricity meter must simultaneously meet the requirements of ease of installation and operational safety. Its structural design directly affects the assembly efficiency and anti-misoperation performance of the electricity meter. Existing electricity meter casings typically include a bottom shell, a top cover, and a terminal cover. The terminal cover is often connected to the top cover by a rotation to facilitate opening and closing, making wiring and maintenance convenient.

[0003] However, the existing terminal cover structure can only realize basic opening and closing functions and lacks a reliable positioning mechanism. When the cover is closed or open, it is easy for external forces to cause the position to shift, affecting the wiring safety or protection effect. More importantly, the existing structure cannot provide real-time feedback on the opening and closing status of the terminal cover. The main control MCU chip has difficulty monitoring abnormal opening of the terminal cover, which poses a risk to electrical safety and metering accuracy caused by unauthorized operation.

[0004] Therefore, there is an urgent need for a housing structure for electricity meters that has reliable positioning function and can provide real-time feedback on the opening and closing status, in order to solve the technical problems of unreliable positioning and inability to monitor the status of existing terminal covers. Utility Model Content

[0005] To address the shortcomings in the prior art, this utility model provides an electricity meter housing.

[0006] The technical solution adopted by this utility model is: an outer shell of an electricity meter, including a bottom shell, a top cover, a terminal cover and a main control MCU chip. The top cover is fixedly connected to the bottom shell, and the terminal cover is rotatably connected to the top cover. The two ends of the top cover are provided with connecting concave surfaces. A rotating shaft is provided in the connecting concave surface, and a closing positioning hole and an opening positioning hole are provided in the connecting concave surface. A signal switch that connects to the main control MCU chip is provided in the closing positioning hole or the opening positioning hole. The terminal cover is provided with hooks at both ends that rotate with the rotating shaft, and the hooks are provided with positioning pins. When the terminal cover is in the closed state, the positioning pin can connect with the closed positioning hole. When the terminal cover is in the open state, the positioning pin can connect with the open positioning hole and trigger the signal switch.

[0007] Furthermore, the signal switch is one of a micro switch, a reed switch, or a Hall sensor, and the positioning post is made of magnetic material or has a built-in permanent magnet. When the positioning post contacts the signal switch, a state change is triggered.

[0008] Furthermore, the positioning post is a telescopic elastic post, including a spring, a post body, and a limiting step ring. The post body is telescopically engaged with the telescopic hole on the hook ring. One end of the spring is connected to the bottom wall of the telescopic hole, and the other end is connected to the post body.

[0009] Furthermore, a hardware debouncing circuit is connected in series between the signal switch and the main control MCU chip. The debouncing circuit includes an RC filter network and a Schmitt trigger, with the filter time constant set to 10-20ms to prevent false triggering due to jitter during the rotation of the terminal cover.

[0010] Furthermore, a handle block is provided at the end of the terminal cover, and a handle hole is provided on the handle block.

[0011] Furthermore, lead sealing holes are provided at both ends of the terminal cover.

[0012] The beneficial effects of this utility model are: 1. Reliable positioning and excellent anti-misoperation performance: The concave surface of the upper cover is provided with positioning holes for closing and opening the cover, and the hook ring of the terminal cover is set with a positioning post. When the cover is closed, the positioning post cooperates with the positioning hole of the closed cover, and when it is opened, it cooperates with the positioning hole of the open cover, so as to achieve precise positioning of the terminal cover in the open and closed state, avoid position displacement caused by external force, and ensure wiring safety and protection stability.

[0013] 2. Real-time status monitoring enhances safety and metering reliability: The signal switch inside the cover opening positioning hole is connected to the main control MCU chip. When the terminal cover is opened, the positioning post triggers the signal switch, enabling the MCU to obtain the opening and closing status in real time. This can provide timely warnings of unauthorized opening, prevent electricity theft and other violations, reduce potential electrical safety hazards, and ensure metering accuracy.

[0014] 3. Simple structure and strong adaptability: The positioning and status monitoring structure is integrated into the upper cover connecting concave surface and terminal cover hook, without the need for major changes to the existing main shell structure, resulting in low processing costs, easy compatibility with existing electricity meter assembly processes, and wide adaptability.

[0015] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 A schematic diagram of the terminal cover.

[0019] Figure 3 This is a cross-sectional schematic diagram of the hook and the positioning post.

[0020] Figure 4 This is a schematic diagram of the upper cover.

[0021] Figure 1-4 Components: 1. Bottom shell; 2. Top cover; 3. Terminal cover; 4. Connecting concave surface; 5. Rotating shaft; 6. Closed cover positioning hole; 7. Open cover positioning hole; 8. Signal switch; 9. Hook ring; 10. Positioning post; 11. Spring; 12. Column; 13. Limiting step ring; 14. Handle block; 15. Handle hole; 16. Lead seal hole; 17. Telescopic hole. Detailed Implementation

[0022] 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.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] This utility model provides a casing for an electricity meter.

[0025] In this embodiment, refer to Figure 1-4 The outer casing of the electricity meter includes a bottom shell 1, a top cover 2, a terminal cover 3, and a main control MCU chip. The top cover is fixedly connected to the bottom shell, and the terminal cover is rotatably connected to the top cover. The two ends of the top cover are provided with connecting concave surfaces 4. A rotating shaft 5 is provided in the connecting concave surface 4, and a closing positioning hole 6 and an opening positioning hole 7 are provided in the connecting concave surface. A signal switch 8 that connects to the main control MCU chip is provided in the closing positioning hole or the opening positioning hole. The terminal cover is provided with hook rings 9 at both ends for rotating with the rotating shaft, and the hook rings 9 are provided with positioning pins 10. When the terminal cover is in the closed state, the positioning pin can connect with the closed positioning hole. When the terminal cover is in the open state, the positioning pin can connect with the open positioning hole and trigger the signal switch.

[0026] In the above technical solution, a system combining a mechanical structure with electrical signal feedback is constructed by setting a rotating shaft, a closing positioning hole, an opening positioning hole, and a signal switch connected to the main control MCU chip on the concave surfaces at both ends of the upper cover, and by setting hooks and positioning posts at both ends of the terminal cover that cooperate with the rotating shaft. This system features a "rotational fit and dual positioning hole adaptation" and integrates a mechanical structure with electrical signal feedback. When the terminal cover rotates around the rotating shaft, the positioning posts move accordingly. When the cover is closed, they engage with the closing positioning hole to achieve mechanical positioning; when the cover is opened, they engage with the opening positioning hole and trigger the signal switch, converting the mechanical opening and closing state into an electrical signal that is transmitted to the main control MCU. This status electrical signal transmission allows the MCU to monitor the terminal cover status in real time, providing data support for safety management. Simultaneously, it prevents the terminal cover from shifting due to external forces after opening and closing, ensuring the protective sealing when closed and the operational stability when open. Specifically, the signal switch is one of a micro switch, a reed switch, or a Hall sensor, and the positioning post is made of magnetic material or has a built-in permanent magnet. When the positioning post contacts the signal switch, a state change is triggered.

[0027] In this embodiment, a suitable signal switch is selected based on different sensing mechanisms (micro switches are triggered by mechanical contact, and reed switches / Hall sensors are triggered by magnetic signals). It is paired with a magnetic positioning post or a positioning post with a built-in permanent magnet. When the positioning post comes into contact with or approaches the signal switch, it triggers the switch state switching (mechanical contact opening and closing or magnetic element signal change), thereby converting the mechanical action into an electrical signal.

[0028] Specifically, the positioning post is a telescopic elastic post, including a spring 11, a post body 12 and a limiting step ring 13. The post body is telescopically engaged with the telescopic hole 17 on the hook ring. One end of the spring is connected to the bottom wall of the telescopic hole, and the other end is connected to the post body.

[0029] In this embodiment, the elastic telescopic design creates a buffer when the positioning post and positioning hole are engaged, reducing the assembly accuracy requirements and avoiding hard contact jamming. The spring preload ensures that the post and positioning hole are tightly engaged, enhancing the resistance to external force-induced misoperation, while reducing loosening caused by vibration.

[0030] Specifically, a hardware debounce circuit is connected in series between the signal switch and the main control MCU chip. The debounce circuit includes an RC filter network and a Schmitt trigger, and the filter time constant is set to 10-20ms to prevent false triggering due to jitter during the rotation of the terminal cover.

[0031] In this embodiment, a hardware debouncing circuit consisting of an RC filter network and a Schmitt trigger is connected in series between the signal switch and the main control MCU chip. The RC filter network uses the charging and discharging characteristics of a capacitor to filter out high-frequency jitter signals within 10-20ms. The Schmitt trigger shapes the filtered signal into a stable high or low level through its threshold voltage characteristics, avoiding false triggering of the switch caused by the jitter of the positioning post during the rotation of the terminal cover. This precise filtering of instantaneous signals generated by rotational jitter ensures that a valid signal is transmitted to the MCU only when the terminal cover is stably in the open state. The signal shaped by the Schmitt trigger has strong anti-interference capabilities, ensuring the accuracy of the status information received by the MCU.

[0032] Specifically, the end of the terminal cover is provided with a handle block 14, and the handle block 14 is provided with a handle hole 15.

[0033] In this embodiment, a handle block with a handle hole is provided at the end of the terminal cover. By extending the operating lever arm and providing a force point for hand gripping or tool insertion, the operator can easily drive the terminal cover to rotate around the pivot by gripping the handle block or inserting a tool into the handle hole.

[0034] Specifically, lead sealing holes 16 are provided at both ends of the terminal cover.

[0035] In this embodiment, lead-sealed holes are provided at both ends of the terminal cover. After the terminal cover is closed, the lead seal is inserted into the lead-sealed hole and sealed to form an irreversible locking structure. Only by breaking the lead seal can the terminal cover be opened. At the same time, the integrity of the lead seal can intuitively reflect whether the terminal cover has been opened without authorization.

[0036] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A housing for an electricity meter, comprising a bottom shell, a top cover, a terminal cover, and a main control MCU chip, wherein the top cover is fixedly connected to the bottom shell, and the terminal cover is rotatably connected to the top cover, characterized in that: The upper cover has connecting concave surfaces at both ends, a rotating shaft is provided in the connecting concave surface, and a closing positioning hole and an opening positioning hole are provided in the connecting concave surface. A signal switch for connecting to the main control MCU chip is provided in the closing positioning hole or the opening positioning hole. The terminal cover is provided with hooks at both ends that rotate with the rotating shaft, and the hooks are provided with positioning pins. When the terminal cover is in the closed state, the positioning pin can connect with the closed positioning hole. When the terminal cover is in the open state, the positioning pin can connect with the open positioning hole and trigger the signal switch.

2. The electricity meter housing according to claim 1, characterized in that: The signal switch is one of a micro switch, a reed switch, or a Hall sensor, and the positioning post is made of magnetic material or has a built-in permanent magnet. When the positioning post contacts the signal switch, it triggers a state change.

3. The electricity meter housing according to claim 1, characterized in that: The positioning post is a telescopic elastic post, including a spring, a post body and a limiting step ring. The post body is telescopically engaged with the telescopic hole on the hook ring. One end of the spring is connected to the bottom wall of the telescopic hole and the other end is connected to the post body.

4. The electricity meter housing according to claim 1, characterized in that: A hardware debounce circuit is connected in series between the signal switch and the main control MCU chip. The debounce circuit includes an RC filter network and a Schmitt trigger. The filter time constant is set to 10-20ms to prevent false triggering due to jitter during the rotation of the terminal cover.

5. The electricity meter housing according to claim 1, characterized in that: The end of the terminal cover is provided with a handle block, and the handle block is provided with a handle hole.

6. The housing of the electricity meter according to claim 1, characterized in that: The terminal cover has lead-sealed holes at both ends.

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