Electricity metering box anti-stealing lock structure

Abstract

The utility model relates to electric energy metering box technical field, concretely is electric energy metering box theft -proof lock structure, including box, the theft -proof part includes the door body fixed connection with hinge, the rear end surface of door body is open, and the top of the front end surface of door body is installed with fingerprint identification module, the last end of connecting frame is fixed with the plug -in rod uniformly, and the plug -in rod passes through the outer wall of door body and is inserted with the corresponding jack plug -in cooperation, through motor drive worm and worm gear drive, drive first bevel gear synchronous meshing three directions second bevel gear, make the synchronous rotation of upper and lower and left side screw rod, drive connecting frame and plug -in rod synchronous insertion box jack, form three points or the structure of multiple points locking simultaneously, the design will traditional single point stress dispersion to multiple lock points, improved the overall pry -resistance of box door, effectively avoid the lock failure caused by single point stress concentration.

Description

Technical Field

[0001] This utility model relates to the technical field of electricity metering boxes, specifically to an anti-theft locking structure for electricity metering boxes. Background Technology

[0002] As a terminal device for metering in the power system, the operational security of electricity metering boxes directly affects the accuracy of electricity metering and the economic benefits of power companies. In power grid operation scenarios, illegal electricity theft not only leads to distorted metering data and causes huge economic losses, but may also trigger power facility failures and threaten the safe operation of the power grid. With the development of smart grids, higher requirements are placed on the reliability and protection of anti-theft technologies for metering boxes. It is urgent to improve their anti-pry and anti-vandalism capabilities through structural optimization and technological innovation to ensure the security and stability of the power metering system.

[0003] Chinese patent CN202322483152.9 discloses an anti-theft electricity metering box. This box includes a box body with an anti-theft mechanism on its inner wall. The mechanism includes a door with a lock fixedly installed on its inner wall. A lock plate is fixedly installed on the surface of the box body. A sliding groove is formed on the surface of the box body, and a slider is slidably connected to the inner cavity of the groove. A tension spring is fixedly installed in the inner cavity of the groove, and an alarm switch is fixedly installed therein. This anti-theft electricity metering box, through its anti-theft mechanism, allows the lock tongue to press against the lock plate when the door moves outward, causing the alarm rod to shift and trigger the alarm switch, thus activating an alarm sound. The reaction force of the tension spring ensures that the slider is subjected to a greater force before sliding, preventing the alarm switch from being triggered by environmental factors.

[0004] Although this anti-theft electricity metering box can prevent the alarm switch from being triggered by environmental factors, it still has the following problems in actual use: The anti-theft electricity metering box uses a traditional mechanical door lock structure to connect the box door and the box body, specifically locking through the interlocking of the bolt and the door frame lock plate. However, this locking method is essentially a single-point locking structure, with the box body and the box door relying on only a single locking point for connection and constraint. This design has significant security risks: when subjected to external prying force, the single-point force causes stress concentration in the contact area between the bolt and the lock plate. Due to the lack of multi-point support and force distribution design, the lock structure cannot withstand continuous prying loads, and is prone to structural failures such as bolt deformation, lock plate breakage, or door frame deformation, which in turn leads to the illegal opening of the box door, exposing the problem of insufficient anti-pry protection. In view of this, we propose an anti-theft locking structure for electricity metering boxes. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-theft locking structure for electricity metering boxes, so as to solve the problem of insufficient anti-pry protection capability of the single-point locking structure mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The anti-theft locking structure of the electricity metering box includes: The box body has a mounting cavity on its front end face. The opening of the mounting cavity is provided with insertion holes on the upper and lower walls and the left wall. Multiple hinges are fixedly installed on the right side of the front end face of the box body. The anti-theft unit is hinged to the opening of the mounting cavity. The anti-theft unit includes a door body fixedly connected to the hinge. The rear end face of the door body is open, and a fingerprint recognition module is installed above the front end face of the door body. A first bevel gear is rotatably installed near the center of the opening on the rear end face of the door body. Second bevel gears mesh with the upper, lower, and left sides of the first bevel gear. Each of the second bevel gears is coaxially keyed to a lead screw. A connecting frame is threaded to the lead screw near its end. A plug is fixed to the end of each connecting frame. The plug passes through the outer wall of the door body and engages with a corresponding plug hole. A connecting rod is fixed near the plug in the opening of the connecting frame, and a spring is sleeved on the outside of the connecting rod. A connecting block is also slidably installed in the opening of the connecting frame. The connecting block is fixed to the door body, and a sliding hole is provided on the connecting block for the sliding connection of the connecting rod. A cover plate is fixed to the rear side of the door, and a worm gear is installed on the rear side of the cover plate. A worm wheel meshes with one side of the worm gear, and a drive shaft is coaxially connected to the first bevel gear through a key. A motor for driving the worm gear to rotate is also installed on the rear side of the cover plate. A controller is installed above the rear end face of the cover plate.

[0007] Preferably, the front surface of the door body is provided with a transparent protective cover outside the fingerprint recognition module, and the bottom of the protective cover is open. This design can effectively prevent dust, moisture, and other substances from corroding the fingerprint recognition module, while not affecting normal fingerprint acquisition operations and extending the module's service life.

[0008] Preferably, the dimensions of the door body are adapted to the opening dimensions of the mounting cavity, and the door body and the cover plate are fixedly connected by bolts. This design ensures smooth opening and closing of the door body, convenient installation and disassembly, and enhances the stability of the connection, preventing external forces from causing the components to separate.

[0009] Preferably, the connecting frame has a U-shaped cross-section, and the opening size of the connecting frame matches the size of the connecting block. This design provides precise guidance and limitation for the sliding of the connecting frame, ensuring its smooth movement under the drive of the lead screw and guaranteeing the normal insertion and removal of the plug.

[0010] Preferably, multiple fixing plates are bolted to the rear opening of the door body, and the lead screw passes through the corresponding fixing plate and is rotatably connected to it. This design ensures stable installation of the lead screw, flexible rotation, reduces shaking during transmission, and improves the reliability and stability of the entire locking structure.

[0011] Preferably, a handle is bolted to the front end of the door near the left edge, and the handle has a U-shaped cross-section. This design is ergonomic, making it easy for operators to apply force and easily open and close the door, thus improving ease of operation and user comfort.

[0012] Preferably, the rear end face of the cover plate is bolted to a hollow housing, and the worm gear and worm wheel are rotatably mounted inside the housing. This design prevents dust and foreign objects from entering, avoids damage to components due to external interference, and ensures long-term stable operation of the transmission mechanism.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. A motor drives a worm gear and worm wheel transmission, which in turn drives the first bevel gear to simultaneously mesh with the second bevel gears in three directions. This causes the lead screws on the top, bottom, and left sides to rotate synchronously, driving the connecting frame and the insertion rod to simultaneously insert into the housing's insertion holes, forming a three-point or multi-point simultaneous locking structure. This design distributes the traditional single-point force to multiple locking points, improving the overall pry resistance of the door and effectively avoiding lock failure caused by stress concentration at a single point. 2. By integrating a fingerprint recognition module at the front of the door, and linking the controller with the motor, the opening and closing of the locking structure is electronically controlled. Compared to traditional mechanical locks, this design raises the technical barrier to unauthorized opening and allows for access control to restrict the operator, reducing security risks such as key duplication. 3. The worm gear transmission pair has a mechanical self-locking characteristic. In the locked state, it can prevent external reverse rotation drive and avoid forcibly unlocking by damaging the transmission components. Combined with the rigid transmission of the bevel gear and the lead screw, it ensures that the insertion rod maintains a stable insertion depth and guarantees the locking stability of the box door. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the box in this utility model; Figure 3 This is an exploded view of the anti-theft mechanism in this utility model; Figure 4 This is a schematic diagram of the structure of the door body in this utility model; Figure 5 This is a schematic diagram of the connecting frame in this utility model; Figure 6This is a schematic diagram of the cover plate in this utility model; Figure 7 This is a partial structural schematic diagram of the present invention; In the picture: 1. Housing; 10. Socket; 11. Hinge; 2. Anti-theft unit; 20. Door body; 200. Handle; 201. Protective cover; 21. Cover plate; 210. Housing; 211. Worm gear; 212. Worm wheel; 213. Drive shaft; 22. Fingerprint recognition module; 23. Motor; 24. First bevel gear; 25. Second bevel gear; 26. Lead screw; 27. Connecting frame; 270. Insert rod; 271. Connecting rod; 272. Spring; 28. Connecting block; 29. ​​Controller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0016] This embodiment provides a technical solution: Please see Figures 1-7As shown, the anti-theft locking structure of the electricity metering box includes a box body 1. The front face of the box body 1 has a mounting cavity. The opening of the mounting cavity has insertion holes 10 on the upper, lower, and left walls. Multiple hinges 11 are fixedly installed on the right side of the front face of the box body 1. An anti-theft part 2 is hinged to the opening of the mounting cavity. The anti-theft part 2 includes a door 20 fixedly connected to the hinges 11. The rear face of the door 20 is open. A fingerprint recognition module 22 is installed above the front face of the door 20 and is fixedly connected to the door 20 by bolts. A first bevel gear 24 is rotatably installed near the center of the opening on the rear face of the door 20. Second bevel gears 25 mesh with the upper, lower, and left sides of the first bevel gear 24. Each second bevel gear 25 is coaxially keyed to a lead screw 26. A connecting bracket 27 is threadedly connected to the lead screw 26 near its end. An insertion rod 270 is fixed to the end of each connecting bracket 27. The connecting frame 27 is tightly welded to the insert rod 270, which passes through the outer wall of the door body 20 and is inserted into the corresponding insertion hole 10. A connecting rod 271 is fixed inside the opening of the connecting frame 27 near the insert rod 270, and a spring 272 is sleeved on the outside of the connecting rod 271. A connecting block 28 is also slidably installed inside the opening of the connecting frame 27. The connecting block 28 is fixed to the door body 20 and is bolted to the door body 20. The connecting block 28 has a groove for the connecting rod 271 to slide. A sliding hole 280 is connected to the door body 20; a cover plate 21 is fixed to the rear side of the door body 20, a worm gear 211 is installed on the rear side of the cover plate 21, a worm wheel 212 is meshed on one side of the worm gear 211, and a drive shaft 213 is coaxially keyed between the worm wheel 212 and the first bevel gear 24; a motor 23 for driving the worm gear 211 to rotate is also installed on the rear side of the cover plate 21; a controller 29 is installed above the rear end face of the cover plate 21, and the controller 29 is fixed to the cover plate 21 by bolts.

[0017] Please see Figure 1 As shown, in this embodiment, the front surface of the door 20 is provided with a transparent protective cover 201 outside the fingerprint recognition module 22, and the bottom of the protective cover 201 is open. The protective cover 201 can provide good protection for the fingerprint recognition module 22.

[0018] In this embodiment, the dimensions of the door body 20 are adapted to the opening dimensions of the mounting cavity, and the door body 20 and the cover plate 21 are fixedly connected by bolts. The adapted dimensions facilitate the smooth opening and closing of the door body 20, while the bolt fixing method ensures the reliable connection between the cover plate 21 and the door body 20.

[0019] Please see Figure 4 As shown, in this embodiment, the cross-sectional shape of the connecting frame 27 is U-shaped, and the opening size of the connecting frame 27 is adapted to the size of the connecting block 28. This design facilitates the smooth sliding of the connecting frame 27 along the connecting block 28, while the connecting block 28 guides and limits the connecting frame 27, ensuring smooth movement of the connecting frame 27.

[0020] Please see Figure 4 As shown, in this embodiment, multiple fixing plates are fixedly connected to the rear end face opening of the door 20 by bolts. The lead screw 26 passes through the corresponding fixing plate and is rotatably connected to the fixing plate. The fixing plates provide support for the lead screw 26 and facilitate its rotation, ensuring the stability of the lead screw 26 installation and the smoothness of its rotation.

[0021] In this embodiment, a handle 200 is bolted to the front end of the door 20 near the left edge. The handle 200 has a U-shaped cross-section. The U-shaped handle 200 facilitates opening and closing the door 20, demonstrating a user-friendly design.

[0022] Please see Figure 6 As shown, in this embodiment, a hollow housing 210 is bolted to the rear end face of the cover plate 21, and the worm 211 and worm wheel 212 are rotatably mounted inside the housing 210. The housing 210 provides excellent protection for the worm 211 and worm wheel 212, ensuring their long-term stable operation.

[0023] Furthermore, in this embodiment, the fingerprint recognition module 22 is used to collect user fingerprint information and convert it into an electrical signal, which is then transmitted to the controller 29 via a wire. The controller 29 has a built-in storage unit that pre-stores authorized fingerprint data. After receiving the electrical signal, it executes a comparison algorithm. When the verification is successful, it outputs a high-level signal to the motor 23, and when the verification fails, it maintains a low level. The motor 23 is electrically connected to the controller 29. After receiving the high-level signal, it starts and drives the worm gear 211 to rotate through the output shaft. After being driven by the worm gear 211 and the worm wheel 212, the motor drives the transmission shaft 213 and the first bevel gear 24 to rotate, which in turn synchronously drives the second bevel gear 25 and the lead screw 26 on the upper, lower and left sides to rotate, thereby realizing the insertion or separation of the insertion rod 270 from the housing insertion hole 10.

[0024] It should be added that, in this embodiment, a micro switch needs to be added at the fitting position of the mounting cavity opening of the housing 1. When the door 20 is manually pushed to close, the door 20 squeezes the micro switch to close its contacts, and the micro switch transmits an electrical signal to the controller 29 through a wire. After receiving the signal, the controller 29 drives the motor 23 to run, which drives the worm gear 211 and worm wheel 212 to rotate. Through the transmission shaft 213, the first bevel gear 24 drives the second bevel gear 25 to rotate, which in turn drives the lead screw 26 to rotate. When the lead screw 26 rotates, the connecting bracket 27 moves along the axial direction of the lead screw 26, so that the insertion rod 270 is inserted into the insertion hole 10 of the housing 1 to complete the locking action. The spring 272 provides a certain preload.

[0025] It is worth noting that the motor 23 involved in this embodiment is a conventional technology and will not be described in detail here.

[0026] In practical use, the user first inputs fingerprint information into the fingerprint recognition module 22. The built-in sensor of the fingerprint recognition module 22 converts the biometric features into electrical signals and transmits them to the controller 29 through wires. Then, the controller 29 calls the authorized fingerprint data in the built-in storage unit and performs feature matching on the input signal through a preset comparison algorithm. When the verification is successful, it outputs a high-level drive signal to the motor 23, and maintains a low-level signal when the verification fails. Then, the motor 23 starts after receiving the high-level signal, and its output shaft drives the worm gear 211 to rotate. The worm gear 211 meshes with the worm wheel 212 to form a speed reduction transmission. The worm wheel 212 drives the first bevel gear 24 at the center position to rotate synchronously through the transmission shaft 213. Next, since the first bevel gear 24 meshes with the second bevel gears 25 on the top, bottom and left sides respectively, the multiple second bevel gears 25 rotate synchronously and transmit the rotational motion to the coaxially keyed lead screw 26. When the lead screw 26 rotates, the connecting bracket 27 connected to the thread moves along the axial direction of the lead screw 26, and the insertion rod 270 fixed at the end of the connecting bracket 27 exits from the insertion hole 10, completing the unlocking action.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-theft locking structure for an electricity metering box, characterized in that, include: The box (1) has an installation cavity on its front end face. The opening of the installation cavity is provided with insertion holes (10) on the upper and lower walls and the left wall. Multiple hinges (11) are fixedly installed on the right side of the front end face of the box (1). The anti-theft unit (2) is hinged to the opening of the mounting cavity. The anti-theft unit (2) includes a door body (20) fixedly connected to the hinge (11). The rear end face of the door body (20) is open. A fingerprint recognition module (22) is installed above the front end face of the door body (20). A first bevel gear (24) is rotatably installed near the center of the opening on the rear end face of the door body (20). A second bevel gear (25) is meshed on the upper, lower, and left sides of the first bevel gear (24). A lead screw (26) is coaxially keyed to each of the second bevel gears (25). A threaded connection is made to the lead screw (26) near the end. A connecting frame (27) is connected, and a plug rod (270) is fixed at the end of the connecting frame (27). The plug rod (270) passes through the outer wall of the door body (20) and is plugged into the corresponding plug hole (10). A connecting rod (271) is fixed in the opening of the connecting frame (27) near the plug rod (270). A spring (272) is sleeved on the outside of the connecting rod (271). A connecting block (28) is also slidably installed in the opening of the connecting frame (27). The connecting block (28) is fixed to the door body (20). A sliding hole (280) is opened on the connecting block (28) for the connecting rod (271) to slide. A cover plate (21) is fixed to the rear side of the door body (20). A worm gear (211) is installed on the rear side of the cover plate (21). A worm wheel (212) meshes with one side of the worm gear (211). A drive shaft (213) is coaxially keyed between the worm wheel (212) and the first bevel gear (24). A motor (23) for driving the worm gear (211) to rotate is also installed on the rear side of the cover plate (21). A controller (29) is installed above the rear end face of the cover plate (21).

2. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: The front end of the door (20) is provided with a transparent protective cover (201) outside the fingerprint recognition module (22), and the bottom of the protective cover (201) is open.

3. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: The dimensions of the door body (20) are adapted to the opening size of the mounting cavity, and the door body (20) and the cover plate (21) are fixedly connected by bolts.

4. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: The cross-sectional shape of the connecting frame (27) is U-shaped, and the opening size of the connecting frame (27) is adapted to the size of the connecting block (28).

5. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: Multiple fixing plates are fixedly connected to the rear end face opening of the door (20) by bolts, and the screw rod (26) passes through the corresponding fixing plate and is rotatably connected to the fixing plate.

6. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: The front end face of the door (20) is fixedly connected to a handle (200) near the left edge by bolts. The handle (200) has a U-shaped cross-section.

7. The anti-theft locking structure for the electricity metering box according to claim 1, characterized in that: The rear end face of the cover plate (21) is fixedly connected to a hollow shell (210) by bolts. The worm (211) and worm wheel (212) are rotatably installed inside the shell (210).

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