Electricity larceny prevention device for electric energy metering box

Abstract

The application provides an electricity larceny prevention device for an electric energy metering box and belongs to the technical field of electric energy metering boxes. The device comprises a box body, an outer door hinged to one side of the box body, a frame fixedly connected between the top and bottom of the inner wall of the box body, an inner door hinged to one side of the frame, a pull handle slidingly arranged in the inner door, a connecting plate slidingly connected to the outer side of the pull handle, a first elastic member sleeved to the outer side of the pull handle and located between the connecting plate and the inner door, and an alarm mechanism arranged on one side of the inner door and matched with the connecting plate. The movable box, the first plug-in board and the second plug-in board are arranged, matched with the jack on the inner door and the first insertion slot on the baffle, and a multi-layer locking structure is formed. When the movable box is in the locking position, the first plug-in board is inserted into the jack of the inner door through the frame, the inner door cannot be opened before the movable box is unlocked, even if the electricity larcener destroys the door lock of the inner door, the inner door cannot be opened due to the blocking effect of the first plug-in board, and the anti-prying ability of the inner door is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of electricity metering box technology, and particularly to an anti-theft device for electricity metering boxes. Background Technology

[0002] Electricity metering boxes are basic equipment used in power systems to install electricity metering devices. They are widely used in electricity metering locations for residential, commercial, and industrial users. They can quantitatively measure electricity to accurately calculate electricity bills. In addition, electricity metering boxes also have the function of protecting circuits and monitoring the operation status of the power grid. In order to prevent criminals from stealing electricity by damaging the metering box or short-circuiting the line, existing electricity metering boxes usually use door locks on the box body for protection. The most common method is to set up two layers of protection on the box body, with an outer door and an inner door, to increase the difficulty of opening the box.

[0003] A search revealed Chinese invention patent CN119787135B, which discloses an electricity metering box equipped with an anti-theft device. This design includes a first installation space and a second installation space within the box, each hinged with a first and second protective door. Within the first installation space, a first protective frame and two second protective frames are hinged to protect the terminals on the main switch, auxiliary switch, and inlet switch. A baffle for protecting the connecting wires is fixed to the middle second protective frame. The design locks the protective door through the cooperation of a rotating shaft and a stop bar. Automatic locking and unlocking of the protective frame is achieved through a locking mechanism and a drive assembly. A monitoring component is installed inside the protective frame, triggering an alarm when the frame is damaged.

[0004] While the aforementioned existing technical solutions have improved the anti-theft performance of electricity metering boxes to some extent, they still have the following shortcomings: Firstly, the locking and unlocking of the protective frame in this scheme relies on electronic drive components such as electric push rods. Once the power is cut off or the electronic components malfunction, the entire locking mechanism will not work properly, the protective frame cannot be locked reliably, and electricity thieves can easily open the protective frame to contact the terminal block to steal electricity. Secondly, the alarm triggering of this scheme relies on the gas leak being detected by the sensor after the protective frame is damaged. This is a post-event alarm type, meaning that the alarm can only be triggered after the electricity theft has already damaged the protective frame. It cannot provide early warning and prevent the electricity thief from forcibly opening the protective door or the protective frame, resulting in insufficient protection timeliness. Therefore, this application provides an anti-theft device for electricity metering boxes to meet the requirements. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-theft device for electricity metering boxes to solve the above-mentioned problems. The device locks the inner door and the baffle respectively through the first and second insert plates on the movable box, the locking mechanism locks the movable box in cooperation with the second slot on the baffle, and the alarm mechanism is triggered based on the tension threshold. This solves the problems mentioned in the background art, such as the protective frame relying on electronic drive components, which makes it impossible to reliably lock when there is a power outage or malfunction, and the alarm triggering being a post-event alarm, which leads to insufficient protection timeliness.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An anti-theft device for an electricity metering box includes a box body, an outer door hinged to one side of the box body, a frame fixedly connected between the top and bottom of the inner wall of the box body, an inner door hinged to one side of the frame, a handle slidingly inserted inside the inner door, a connecting plate slidingly connected to the outside of the handle, a first elastic element sleeved outside the handle and between the connecting plate and the inner door, and an alarm mechanism that works in conjunction with the connecting plate on one side of the inner door. The inner wall of the box is symmetrically equipped with slide rails, and a baffle is slidably installed between the two slide rails to cover the wiring inside the box. A movable box is slidably installed on the side of the frame away from the inner door, and a positioning mechanism is provided on the movable box to lock the position of the inner door and the baffle. The movable box is also provided with a locking mechanism, which is used to cooperate with the baffle in the locked state to lock the sliding position of the movable box relative to the frame.

[0007] Optionally, the positioning mechanism includes a plurality of first insert plates fixed at equal intervals on one side of the movable box, and the inner door has a plurality of insertion holes at equal intervals on the side near the frame, with one end of the first insert plate extending through the frame into the insertion hole.

[0008] Optionally, the positioning mechanism further includes a plurality of second insert plates fixed at equal intervals on one side of the movable box. A fixing block is fixedly connected to one side of the baffle plate. A plurality of first slots are equally spaced inside the fixing block, and one end of the second insert plate extends into the first slot.

[0009] Optionally, the locking mechanism includes a rod that is equidistantly slidably disposed inside the movable box, a second elastic element is sleeved between the rod and the inner wall of the movable box, and a magnetic element is fixedly connected to one end of the rod.

[0010] Optionally, the fixing block has multiple second slots equidistantly spaced on the side away from the first slot. When the locking mechanism is in the locked state, the end of the insertion rod away from the magnetic attractor extends into the second slot.

[0011] Optionally, the frame has a sliding groove inside, and a push-pull plate is slidably connected inside the sliding groove. The push-pull plate is fixedly connected to one side of the movable box. The push-pull plate has a tool slot inside for placing a special tool. The special tool is used to attract the magnetic component from the outside and drive the plug rod out of the second slot to unlock the movable box.

[0012] Optionally, the movable box has symmetrically arranged concave portions on both sides, and the frame has symmetrically arranged protrusions on the inner wall. When the movable box is reset, the protrusions are inserted into the concave portions to fix the position of the movable box.

[0013] Optionally, the alarm mechanism includes a tactile switch fixed on one side of the inner door. Normally, the connecting plate is separated from the tactile switch, and a buzzer electrically connected to the tactile switch is fixedly connected to one side of the inner door.

[0014] Optionally, a fastener is threaded to one end of the handle and located on the outside of the connecting plate, and a stop is symmetrically provided on the side of the connecting plate near the inner door to limit the range of motion of the connecting plate.

[0015] Optionally, a mounting bracket is fixedly connected to the inner wall of the enclosure, and a main switch and multiple auxiliary switches are provided on the mounting bracket. In the locked state, the baffle is located outside the terminals of the main and auxiliary switches.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above-mentioned solution, the anti-theft device for electricity metering boxes provided in this application can form a multi-layer locking structure by setting a movable box and its first and second insert plates, in conjunction with the insertion holes on the inner door and the first slot on the baffle. When the movable box is in the locked position, the first insert plate passes through the frame and inserts into the insertion hole of the inner door, so that the inner door cannot be opened before the movable box is unlocked. Even if the electricity thief damages the lock of the inner door itself, the inner door still cannot be opened due to the blocking effect of the first insert plate, which effectively improves the anti-pry capability of the inner door. At the same time, the second insert plate is inserted into the first slot of the fixed block, so that the baffle cannot slide along the slide rail. Even if the electricity thief manages to open the outer door and the inner door, the terminal and the line are still blocked by the baffle and cannot be short-circuited. The locking mechanism engages with the second slot on the baffle. The rod remains extended under the action of the second elastic element and is inserted into the second slot. The movable box is indirectly locked by locking the position of the baffle. If an electricity thief wants to open the inner door or move the baffle, he must use a special magnetic tool to attract the magnetic component from the outside, so that the rod retracts against the second elastic element and exits the second slot. Only then can the locking mechanism unlock the movable box. Moreover, this magnetic unlocking method can only be unlocked by a special magnetic tool, which effectively prevents the locking mechanism from being cracked by general tools. By installing a handle, a connecting plate, a first elastic element, and a tactile switch on the inner door, a trigger-type alarm mechanism based on a pulling force threshold can be formed. When the locking mechanism is in the locked state, the inner door cannot be opened normally because it is locked by the first insert plate. If the electricity thief forcibly pulls the handle, the handle overcomes the elastic force of the first elastic element and produces a sliding displacement, which in turn drives the connecting plate to trigger the tactile switch to start the buzzer alarm. Moreover, this process does not rely on electronic sensors or program judgment, and the structure is simple and reliable. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the inner door being opened according to the first embodiment of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the inner door being opened according to the second embodiment of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 This is a cross-sectional view of the inner door of the present invention when it is closed; Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle; Figure 8 This is a schematic diagram of the inner door and baffle unlocking according to the present invention; Figure 9 This is a schematic diagram of the overall structure of the active box of the present invention; Figure 10 This is a rear view of the inner door of the present invention; Figure 11 This is a partial structural schematic diagram of the baffle of the present invention.

[0019] Figure label: 1. Box body; 11. Outer door; 12. Frame; 121. Slide rail; 122. Protrusion; 2. Inner door; 21. Pull handle; 22. Connecting plate; 221. Stop; 23. First elastic element; 24. Fastener; 25. Socket; 3. Tactile switch; 4. Buzzer; 5. Slide rail; 6. Baffle; 61. Fixing block; 611. First slot; 612. Second slot; 7. Movable box; 71. Sliding plate; 711. Tool slot; 72. First insert plate; 73. Second insert plate; 74. Insert rod; 741. Second elastic element; 742. Magnetic element; 75. Recess.

[0020] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0021] The anti-theft device for electricity metering boxes provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0022] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0023] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0024] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0025] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0026] Example 1: like Figure 1 , Figure 2 Figure 6 and Figure 7 As shown, an embodiment of the present invention provides an anti-theft device for an electricity metering box, including a box body 1. An outer door 11 is hinged to one side of the box body 1. A frame 12 is fixedly connected between the top and bottom of the inner wall of the box body 1. An inner door 2 is hinged to one side of the frame 12. Slide rails 5 are symmetrically installed on the inner wall of the box body 1. A baffle 6 is slidably installed between the two slide rails 5. With the above structure, the outer door 11 constitutes the first protective layer, the inner door 2 constitutes the second protective layer, and the baffle 6 serves as the third protective layer to shield the internal terminals. The three layers of protection are arranged in sequence, which can effectively increase the difficulty for electricity thieves to access the internal wiring. A mounting bracket is fixedly connected to the inner wall of the box body 1. A main switch and multiple auxiliary switches are installed on the mounting bracket. In the locked state, the baffle 6 is located outside the terminals of the main and auxiliary switches to shield the wiring inside the box body 1. The baffle 6 is slidably installed on the slide rails 5, so that the baffle 6 can shield the terminal area in the locked state and can slide away along the slide rails 5 when maintenance is required, which is convenient for staff to operate. like Figures 7 to 11As shown, a movable box 7 is slidably provided on the side of the frame 12 away from the inner door 2, and a positioning mechanism is provided on the movable box 7 for locking the positions of the inner door 2 and the baffle 6. The positioning mechanism includes multiple first insert plates 72 fixed at equal intervals on one side of the movable box 7. Multiple insertion holes 25 are equally spaced on the side of the inner door 2 close to the frame 12, and one end of the first insert plate 72 extends through the frame 12 into the insertion hole 25. When the movable box 7 is in the locked position, the first insert plate 72 passes through the frame 12 and is inserted into the insertion hole 25 of the inner door 2, so that the inner door 2 cannot be opened before the movable box 7 is unlocked. With this design, even if the electricity thief damages the lock of the inner door 2 itself, the inner door 2 still cannot be opened due to the blocking effect of the first insert plate 72, so as to improve the anti-pry capability of the inner door 2. The multiple first insert plates 72 and the multiple insertion holes 25 are matched one by one, which can make the locking force evenly distributed along the vertical direction of the inner door 2, avoiding the risk of the inner door 2 being forcibly pried open due to single-point locking. Furthermore, the positioning mechanism also includes multiple second insert plates 73 fixed at equal intervals on one side of the movable box 7. A fixing block 61 is fixedly connected to one side of the baffle 6. Multiple first slots 611 are equally spaced inside the fixing block 61, and one end of the second insert plate 73 extends into the first slot 611. When the movable box 7 is in the locked position, the second insert plate 73 is inserted into the first slot 611 of the fixing block 61, so that the baffle 6 cannot slide along the slide rail 5 before the movable box 7 is unlocked. In this way, even if the electricity thief manages to open the outer door 11 and the inner door 2, the baffle 6 cannot be moved because it is locked by the second insert plate 73. The terminals and lines are still blocked by the baffle 6, and the electricity thief cannot perform short-circuiting operations. The multiple second insert plates 73 and the multiple first slots 611 are matched one-to-one, which can make the locking force evenly distributed along the height direction of the baffle 6, ensuring that the baffle 6 will not be partially deflected or deformed and fall off when pried by external force. like Figure 7 and Figure 8As shown, the movable box 7 is also equipped with a locking mechanism. The locking mechanism is used to cooperate with the baffle 6 in the locked state to lock the sliding position of the movable box 7 relative to the frame 12. The locking mechanism includes a rod 74 that is equidistantly slidably disposed inside the movable box 7. A second elastic member 741 is sleeved between the rod 74 and the inner wall of the movable box 7. A magnetic member 742 is fixedly connected to one end of the rod 74. A plurality of second slots 612 are equidistantly provided on the side of the fixing block 61 away from the first slot 611. When the locking mechanism is in the locked state, the rod 74 is away from the magnetic member. One end of the component 742 extends into the second slot 612. Since the insertion rod 74 is inserted into the second slot 612 on the fixing block 61, and the fixing block 61 is fixed on the baffle 6, when the locking mechanism is triggered, the movable box 7 can be indirectly locked by locking the position of the baffle 6. If the electricity thief wants to open the inner door 2 or move the baffle 6, he must first release the locking mechanism from locking the movable box 7. The setting of the second elastic component 741 ensures that the insertion rod 74 always remains in the extended state when there is no external force, ensuring that the locking mechanism is in a reliable locking state under normal conditions. like Figure 8 As shown, a slide groove 121 is provided inside the frame 12. A push-pull plate 71 is slidably connected inside the slide groove 121 and is fixedly connected to one side of the movable box 7. A tool slot 711 is provided inside the push-pull plate 71 for placing a special tool. This special tool is used to attract the magnetic component 742 from the outside and drive the insertion rod 74 out of the second slot 612 to unlock the movable box 7. When the staff needs to open the inner door 2 for maintenance, they first place the special magnetic tool in the tool slot 711. The magnetic attraction attracts the magnetic component 742, causing the magnetic component 742 to drive the insertion rod 74 to overcome the elasticity of the second elastic component 741. The force is slid until the end of the insertion rod 74 is completely removed from the second slot 612. At this time, the locking mechanism is released from locking the movable box 7. The operator can then push the push-pull plate 71 to slide along the slide groove 121, causing the movable box 7 to move away from the inner door 2 and the baffle 6. After the movable box 7 slides, the first insertion plate 72 is removed from the insertion hole 25, and the second insertion plate 73 is removed from the first slot 611. The inner door 2 and the baffle 6 are released at the same time. The insertion rod 74 is driven to retract by magnetic attraction, so that only personnel equipped with special magnetic tools can unlock the locking mechanism. Ordinary tools cannot unlock it, thereby improving the security of the anti-theft device. Furthermore, such as Figures 7 to 9 As shown, recessed portions 75 are symmetrically arranged on both sides of the movable box 7, and protrusions 122 are symmetrically arranged on the inner wall of the frame 12. When the movable box 7 is reset, the protrusions 122 are inserted into the recessed portions 75 to fix the position of the movable box 7. During maintenance, the push-pull plate 71 is pushed to make the movable box 7 slide back to the initial position. At this time, the protrusions 122 are inserted into the recessed portions 75, which can position the movable box 7 and prevent the movable box 7 from sliding due to vibration or tilt before the locking mechanism relocks. like Figures 2 to 6 As shown, a handle 21 is slidably inserted inside the inner door 2. A connecting plate 22 is slidably connected to the outside of the handle 21. A first elastic element 23 is sleeved on the outside of the handle 21, between the connecting plate 22 and the inner door 2. A fastener 24 is threadedly connected to one end of the handle 21, on the outside of the connecting plate 22. Stops 221 are symmetrically arranged on the side of the connecting plate 22 near the inner door 2. The handle 21 serves as both the operating handle for opening the inner door 2 and the trigger element for the alarm mechanism. When the inner door 2 needs to be opened normally, the operator can pull the handle 21 to rotate and open the inner door 2. When the locking mechanism is in the unlocked state, the inner door 2 is not obstructed by the first insert plate 72. The door is easily opened with normal pulling force. At this time, the handle 21 slides only slightly relative to the inner door 2, and the connecting plate 22 remains separated from the tactile switch 3, so no alarm is triggered. The fastener 24 is used to adjust the initial position of the connecting plate 22. By rotating the fastener 24, the position of the connecting plate 22 relative to the inner door 2 can be adjusted, thereby adjusting the initial gap between the connecting plate 22 and the tactile switch 3 to meet the needs of different trigger sensitivities. The stop part 221 is used to limit the sliding range of the connecting plate 22 relative to the inner door 2, preventing the connecting plate 22 from going beyond the limit position and causing excessive compression of the tactile switch 3, thus avoiding damage to the tactile switch 3 due to pressure. like Figure 2 and Figure 3 As shown, an alarm mechanism is provided on one side of the inner door 2, which works in conjunction with the connecting plate 22. The alarm mechanism includes a tactile switch 3 fixed on one side of the inner door 2. Under normal conditions, the connecting plate 22 and the tactile switch 3 are separated. A buzzer 4, which is electrically connected to the tactile switch 3, is fixedly connected to one side of the inner door 2. The alarm mechanism adopts a mechanical triggering method in conjunction with the tactile switch 3 and the connecting plate 22. It does not rely on electronic sensors and program judgment. The structure is simple and stable. The alarm mechanism also has an independent power supply, which can maintain the warning operation when the power is off.

[0027] The working principle of this embodiment: When maintenance is required, first place the special magnetic tool in the tool slot 711. The magnetic force generated by the special tool attracts the magnetic suction component 742. The magnetic suction component 742 drives the insertion rod 74 to slide against the elastic force of the second elastic component 741, causing the end of the insertion rod 74 to exit from the second slot 612. At this time, the locking mechanism releases the lock on the movable box 7. Then, the operator pushes the push-pull plate 71 to slide along the slide groove 121. The push-pull plate 71 drives the movable box 7 away from the inner door 2 and the baffle 6. During the movement of the movable box 7, the first insertion plate 72 exits from the insertion hole 25, and the second insertion plate 73 exits from the first slot 611. The inner door 2 and the baffle 6 are released simultaneously. Then, the operator pulls the handle 21 to open the inner door 2. Since the inner door 2 is no longer subject to the first... The blocking of the plug plate 72 can be opened with normal pulling force. The connecting plate 22 remains separated from the tactile switch 3, the buzzer 4 does not work, and after the inner door 2 is opened, the staff can push the baffle 6 to slide away along the slide rail 5 to expose the terminal and wiring for maintenance. After the maintenance is completed, the staff slide the baffle 6 back to its original position, close the inner door 2, and then pull the push-pull plate 71 to reset the movable box 7 to its initial position. Then, the special tool is taken out. At this time, the plug rod 74 automatically extends under the action of the second elastic element 741 and inserts into the second slot 612 to complete the locking. At the same time, the first plug plate 72 and the second plug plate 73 are re-inserted into the plug hole 25 and the first slot 611 respectively, and the inner door 2 and the baffle 6 are locked again, and the entire device returns to the locked state.

[0028] Example 2: like Figure 4 and Figure 5 As shown, the difference between this embodiment and embodiment one lies in the working state and alarm principle when the active box 7 is in the locked state. The rest of the structural settings are the same as in embodiment one, and will not be described again here. When the locking mechanism is in the locked state, the insert rod 74 remains extended under the elastic force of the second elastic member 741, and its end is inserted into the second slot 612 of the fixing block 61, locking the movable box 7 on the frame 12 and preventing it from sliding. At this time, the first insert plate 72 on the movable box 7 passes through the frame 12 and is inserted into the insert hole 25 on the back of the inner door 2, thus locking the inner door 2. At the same time, the second insert plate 73 is inserted into the first slot 611 on the fixing block 61, thus locking the baffle 6. The inner door 2 cannot be opened and the baffle 6 cannot slide. When an electricity thief attempts to forcibly open the inner door 2 to steal electricity, they pull the handle 21 to apply external force. Since the inner door 2 is locked by the first plug plate 72 and cannot be rotated, the handle 21 slides outward relative to the inner door 2 under the action of this external force, and compresses the first elastic element 23. During this process, the handle 21 drives the connecting plate 22 to move outward synchronously. When the connecting plate 22 contacts the tactile switch 3 fixed on one side of the inner door 2, the tactile switch 3 is triggered, and the buzzer 4 is immediately powered on to emit an alarm sound, which serves as a warning and deterrent to the electricity theft. At the same time, the alarm of the buzzer 4 can also alert the surrounding personnel to discover the abnormal situation in time. If the electricity thief continues to increase the pulling force and tries to forcibly damage the first plug plate 72 or the inner door 2 itself, since the alarm has been triggered, the surrounding personnel can respond in time, thereby effectively preventing the further implementation of the electricity theft. Even if the electricity thief uses force to open the inner door 2, the baffle 6 is still locked by the second insert plate 73 inserted into the first slot 611 and cannot be slid away along the slide rail 5. The terminals and lines are always blocked by the baffle 6, and the electricity thief still cannot perform a short-circuit operation. If the electricity thief attempts to break the baffle 6 or the fixing block 61 to release the lock, since the insert rod 74 is simultaneously inserted into the second slot 612, the baffle 6 and the fixing block 61 are constrained in multiple directions. Therefore, the difficulty of breaking the baffle and the time required can be increased, providing managers with a longer response time.

[0029] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An anti-theft device for an electricity metering box, comprising a box body (1), an outer door (11) hinged to one side of the box body (1), a frame (12) fixedly connected between the top and bottom of the inner wall of the box body (1), and an inner door (2) hinged to one side of the frame (12), characterized in that, A handle (21) is slidably inserted inside the inner door (2). A connecting plate (22) is slidably connected to the outside of the handle (21). A first elastic element (23) is sleeved on the outside of the handle (21) and between the connecting plate (22) and the inner door (2). An alarm mechanism that works with the connecting plate (22) is provided on one side of the inner door (2). The inner wall of the box (1) is symmetrically equipped with slide rails (5), and a baffle (6) is slidably installed between the two slide rails (5) to cover the wiring inside the box (1). A movable box (7) is slidably provided on the side of the frame (12) away from the inner door (2), and a positioning mechanism is provided on the movable box (7) to lock the position of the inner door (2) and the baffle (6). The movable box (7) is also provided with a locking mechanism, which is used to cooperate with the baffle (6) in the locked state to lock the sliding position of the movable box (7) relative to the frame (12).

2. The anti-theft device for an electricity metering box according to claim 1, characterized in that, The positioning mechanism includes multiple first insert plates (72) fixed at equal intervals on one side of the movable box (7). The inner door (2) has multiple insertion holes (25) at equal intervals on the side near the frame (12), and one end of the first insert plate (72) extends through the frame (12) into the insertion hole (25).

3. The anti-theft device for an electricity metering box according to claim 1, characterized in that, The positioning mechanism also includes a plurality of second insert plates (73) fixed at equal intervals on one side of the movable box (7). A fixing block (61) is fixedly connected to one side of the baffle (6). A plurality of first slots (611) are opened at equal intervals inside the fixing block (61), and one end of the second insert plate (73) extends into the first slot (611).

4. The anti-theft device for an electricity metering box according to claim 1, characterized in that, The locking mechanism includes a rod (74) that is equidistantly slidably disposed inside the movable box (7). A second elastic element (741) is sleeved between the rod (74) and the inner wall of the movable box (7). A magnetic element (742) is fixedly connected to one end of the rod (74).

5. The anti-theft device for an electricity metering box according to claim 3, characterized in that, The fixing block (61) has multiple second slots (612) equidistantly opened on the side away from the first slot (611). When the locking mechanism is in the locked state, the end of the insert rod (74) away from the magnetic attractor (742) extends into the second slot (612).

6. The anti-theft device for an electricity metering box according to claim 5, characterized in that, The frame (12) has a sliding groove (121) inside, and a push-pull plate (71) is slidably connected inside the sliding groove (121). The push-pull plate (71) is fixedly connected to one side of the movable box (7). The push-pull plate (71) has a tool slot (711) inside, which is used to place a special tool. The special tool is used to attract the magnetic suction piece (742) from the outside and drive the insertion rod (74) to exit from the second slot (612) to unlock the movable box (7).

7. The anti-theft device for an electricity metering box according to claim 1, characterized in that, The movable box (7) has symmetrically arranged concave portions (75) on both sides, and the inner wall of the frame (12) has symmetrically arranged protrusions (122). When the movable box (7) is reset, the protrusions (122) are inserted into the concave portions (75) to fix the position of the movable box (7).

8. The anti-theft device for an electricity metering box according to claim 1, characterized in that, The alarm mechanism includes a tactile switch (3) fixed on one side of the inner door (2). Under normal conditions, the connecting plate (22) is separated from the tactile switch (3). A buzzer (4) that is electrically connected to the tactile switch (3) is fixedly connected to one side of the inner door (2).

9. The anti-theft device for an electricity metering box according to claim 1, characterized in that, One end of the handle (21) and the outer side of the connecting plate (22) is threaded with a fastener (24). The connecting plate (22) is symmetrically provided with a stop (221) on the side near the inner door (2) to limit the range of motion of the connecting plate (22).

10. The anti-theft device for an electricity metering box according to claim 1, characterized in that, An installation bracket is fixedly connected to the inner wall of the housing (1). The installation bracket is equipped with a main switch and multiple auxiliary switches. In the locked state, the baffle (6) is located outside the terminals of the main and auxiliary switches.

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