A sealed electric meter with electricity larceny prevention function
By designing anti-theft and locking mechanisms in the meter box and using a combination of special bolts and wedges, a double locking mechanism for the meter box is achieved, solving the problem of electricity theft risk and safety hazards of sealed meters and improving the meter's anti-theft capability and usage safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI DAHUA MEASUREMENT & CONTROL EQUIP CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-23
Smart Images

Figure CN224399477U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealed electricity meter technology, specifically a sealed electricity meter with anti-theft function. Background Technology
[0002] Electricity management departments primarily rely on electricity meter readings to charge users. However, most electricity meters on the market lack effective anti-theft devices, allowing some users to haphazardly connect and install electrical wires, resulting in significant electricity revenue losses for the country. Furthermore, this unauthorized wiring also poses numerous safety hazards, potentially leading to fires, personal injury, and other serious accidents, causing incalculable damage to national and public property.
[0003] In the daily operation of sealed electricity meters, traditional designs have significant safety shortcomings—they lack professional anti-theft mechanisms, leaving the meters constantly at risk of illegal electricity theft during operation. When electricity theft occurs, the unauthorized and haphazard wiring is commonplace. These illegally strung lines act like lurking "electricity tigers," not only disrupting the normal operation of the power grid but also creating serious safety hazards such as leakage, short circuits, and even fires. This greatly weakens the safety performance of the meters in actual use, posing a dual threat to both power supply and user safety. Utility Model Content
[0004] The purpose of this invention is to provide a sealed electricity meter with anti-theft function to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model proposes a sealed electricity meter with anti-theft function, including an electricity meter box, an electricity meter body inside the electricity meter box, an anti-theft mechanism on one side of the electricity meter box, and a locking mechanism inside the electricity meter box;
[0006] The anti-theft mechanism includes a mounting block fixedly connected to the middle of one side of the meter box. The inner wall of the mounting block has a mounting groove. Two support plates are fixedly connected inside the mounting groove. A first connecting rod is inserted through both ends of one side of each of the two support plates. A spring is sleeved on the outer wall of each first connecting rod. A movable plate is fixedly connected to one side of each pair of first connecting rods. A fixing block is fixedly connected to one side of each pair of movable plates. A groove is formed on one side of each pair of fixing blocks.
[0007] In one example, both ends of the mounting block are provided with strip holes, and the other end of every two first connecting rods is fixedly connected with a limiting plate, and the limiting plate is interlocked with the strip hole.
[0008] In one example, the mounting block has a bolt threaded on one side, and a wedge block is fixedly connected to the other end of the bolt.
[0009] In one example, the locking mechanism includes a door hinged to one side of the meter box, with limit rods fixedly connected to both sides of the back of the door, and a steel plate on one side of the door, with the limit rods inserted through both sides of the steel plate.
[0010] In one example, two connecting rods are rotatably connected to one side of the steel plate, and a torsion spring is embedded at one end of each of the two connecting rods. Baffles are fixedly connected to both sides of the inner wall of the meter box.
[0011] In one example, a partition is fixedly connected to the middle of one side of the door, and the partition is directly opposite the mounting block.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. When the meter box is closed, it needs to be secured to the door. This is done by turning a bolt into the screw hole inside the mounting groove. As the bolt extends further in, its specially manufactured shape causes it to press against the fixing block inside the mounting groove when it reaches a certain position. One end of the specially manufactured bolt enters a groove on one side of the fixing block, further pressing against the groove. The groove's volume is smaller than the bolt's. This pressing against the groove drives the limiting plate at the other end of the first connecting rod to move outward, making its height higher than the inside of the mounting block, thus achieving the purpose of fixation. If someone attempts to steal electricity and uses a counterfeit bolt, it will not reach the correct position, the internal groove will not be pressed, and the limiting plates at both ends will not extend, making it easier to identify someone attempting to steal electricity.
[0014] 2. When electricity thieves attempt to forcibly break into the meter box, the steel plate, under external force, will slide into the meter box. Two connecting rods are rotatably connected to one side of the steel plate, and the connecting rods are connected by two torsion springs. There is also a baffle inside the meter box. When the steel plate reaches a certain position, the connecting rods on both sides will unfold under the action of the torsion springs, thereby locking the box door and the meter box, preventing electricity thieves from opening the meter box to steal electricity. With this double protection, the safety of residents during the use of the meter is improved. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the internal structure of the mounting block of this utility model;
[0017] Figure 3 This is a schematic diagram of the internal structure of the bolt insertion mounting block of this utility model;
[0018] Figure 4 This is a schematic diagram of the bolt structure of this utility model;
[0019] Figure 5 This is a schematic diagram of the back structure of the box door of this utility model;
[0020] Figure 6 This is a schematic diagram of the internal partition structure of the meter box of this utility model.
[0021] In the diagram: 1. Meter box; 2. Meter body; 3. Anti-theft mechanism; 301. Mounting block; 302. Mounting groove; 303. Support plate; 304. First connecting rod; 305. Spring; 306. Movable plate; 307. Fixing block; 308. Groove; 309. Strip hole; 310. Limiting plate; 311. Bolt; 312. Wedge block; 4. Locking mechanism; 401. Box door; 402. Limiting rod; 403. Steel plate; 404. Connecting rod; 405. Torsion spring; 406. Baffle; 407. Partition. 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] Please see Figure 1-6 This utility model provides a technical solution: a sealed electricity meter with anti-theft function, including an electricity meter box 1, an electricity meter body 2 inside the electricity meter box 1, an anti-theft mechanism 3 on one side of the electricity meter box 1, and a locking mechanism 4 inside the electricity meter box 1.
[0024] The anti-theft mechanism 3 includes a mounting block 301 fixedly connected to the middle of one side of the meter box 1. The inner wall of the mounting block 301 is provided with a mounting groove 302. Two support plates 303 are fixedly connected inside the mounting groove 302. A first connecting rod 304 is inserted and connected to both ends of one side of the two support plates 303. A spring 305 is sleeved on the outer wall of each first connecting rod 304. A movable plate 306 is fixedly connected to one side of each pair of first connecting rods 304. A fixing block 307 is fixedly connected to one side of each pair of movable plates 306. A groove 308 is provided on one side of each pair of fixing blocks 307.
[0025] Both ends of the mounting block 301 are provided with strip holes 309, and the other end of each pair of first connecting rods 304 is fixedly connected to a limiting plate 310, and the limiting plate 310 is interlocked with the strip hole 309.
[0026] When the meter box 1 is closed, it is necessary to fix the door 401 and the meter box 1 together. This is achieved by a mounting block 301 located on one side of the meter box 1. The mounting block 301 has a mounting groove 302 inside, and support plates 303 are located at both ends of the mounting groove 302. A first connecting rod 304 is inserted through the support plates 303. A spring 305 is fitted onto the outer wall of the first connecting rod 304, and a movable plate 306 is located at the other end of the first connecting rod 304. A fixing block 307 and a groove 308 are located on one side of the movable plate 306. This allows the bolt 311 to be inserted into the screw hole inside the mounting groove 302 during use. As the bolt 311 is continuously pushed in, due to its specially manufactured shape, when the bolt 311 reaches a certain position... When the device is in place, the fixing block 307 located inside the mounting groove 302 will be squeezed, and one end of the specially manufactured bolt 311 will enter the groove 308 on one side of the fixing block 307 and squeeze the groove 308. The volume that the groove 308 can accommodate is smaller than that of the bolt 311. When the groove 308 is squeezed, the limiting plate 310 located at the other end of the first connecting rod 304 will be driven to move outward, so that its height will be higher than the inside of the mounting block 301, thereby achieving the purpose of fixing. When someone wants to steal electricity, if a counterfeit bolt 311 is used for fixing, it will not reach the corresponding position, the groove 308 inside will not be squeezed, and the limiting plates 310 at both ends will not protrude, thus making it easier to identify someone's intention to steal electricity.
[0027] Furthermore, the front of the mounting block 301 is threaded with a bolt 311, and the other end of the bolt 311 is fixedly connected to a wedge block 312.
[0028] The other end of the special bolt 311 is provided with a wedge block 312, which corresponds to the position of the groove 308 and is used to squeeze the groove 308 to drive the limiting plate 310 to extend outward.
[0029] Furthermore, the locking mechanism 4 includes a door 401 hinged to one side of the meter box 1, with limit rods 402 fixedly connected to both sides of the back of the door 401, and a steel plate 403 provided on one side of the door 401, with the two sides of the steel plate 403 interlocked with the limit rods 402.
[0030] Two connecting rods 404 are rotatably connected to one side of the steel plate 403. A torsion spring 405 is embedded at one end of each connecting rod 404. Baffles 406 are fixedly connected to both sides of the inner wall of the meter box 1.
[0031] In use, a door 401 is located on one side of the meter box 1. Limiting rods 402 are provided on both sides of the door 401, and steel plates 403 are inserted and connected to the outside of the limiting rods 402. When electricity thieves try to forcibly break into the meter box 1, the steel plates 403 will slide into the meter box 1 under the action of external force. Two connecting rods 404 are rotatably connected on one side of the steel plates 403. The connecting rods 404 are connected by two torsion springs 405. A baffle 406 is provided inside the meter box 1. When the steel plates 403 reach a certain position, the connecting rods 404 on both sides will unfold under the action of the torsion springs 405, thereby locking the door 401 and the meter box 1, preventing electricity thieves from opening the meter box 1 to steal electricity. With the double protection, the safety of residents during the use of the meter body 2 is improved.
[0032] Furthermore, a partition 407 is fixedly connected to the middle of one side of the door 401, and the partition 407 is directly opposite the mounting block 301.
[0033] The function of the partition 407 is to pass through the bolt 311 and fix it to the mounting block 301.
[0034] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so they are described more simply; relevant parts can be referred to the descriptions of the method embodiments.
[0035] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.
Claims
1. A sealed electric meter with electricity larceny prevention function, comprising an electric meter box (1), an electric meter body (2) is arranged in the electric meter box (1), a theftproof mechanism (3) is arranged on one side of the electric meter box (1), and a locking mechanism (4) is arranged in the electric meter box (1); characterized in that The theftproof mechanism (3) comprises a mounting block (301) fixedly connected to the middle part of one side of the electric meter box (1), an installation groove (302) is formed in the inner wall of the mounting block (301), two supporting plates (303) are fixedly connected in the installation groove (302), first connecting rods (304) are penetratingly connected to the two ends of one side of the two supporting plates (303), springs (305) are sleeved on the outer walls of the first connecting rods (304), movable plates (306) are fixedly connected to one side of each two first connecting rods (304), fixed blocks (307) are fixedly connected to one side of the two movable plates (306), and recesses (308) are formed in one side of the two fixed blocks (307).
2. The sealed electric meter with the electricity larceny prevention function according to claim 1, characterized in that: Strip-shaped holes (309) are formed in the two ends of the mounting block (301), limit plates (310) are fixedly connected to the other ends of each two first connecting rods (304), and the limit plates (310) are penetratingly connected with the strip-shaped holes (309).
3. The sealed electric meter with electricity larceny prevention function according to claim 1, characterized in that: A bolt (311) is screw-connected to the front face of the mounting block (301), and a wedge-shaped block (312) is fixedly connected to the other end of the bolt (311).
4. The sealed electric meter with electricity larceny prevention function according to claim 1, characterized in that: The locking mechanism (4) comprises a box door (401) hinged to one side of the electric meter box (1), limit rods (402) are fixedly connected to the two sides of the back face of the box door (401), a steel plate (403) is arranged on one side of the box door (401), and the two sides of the steel plate (403) are penetratingly connected with the limit rods (402).
5. The sealed electric meter with the electricity larceny prevention function according to claim 4, characterized in that: Two connecting rods (404) are rotatably connected to one side of the steel plate (403), torsional springs (405) are embedded in one end of the two connecting rods (404), and baffles (406) are fixedly connected to the two sides of the inner wall of the electric meter box (1).
6. The sealed electric meter with electricity larceny prevention function according to claim 4, characterized in that: A partition plate (407) is fixedly connected to the middle part of one side of the box door (401), and the partition plate (407) is located opposite to the mounting block (301).