Electricity larceny prevention meter box

Abstract

This utility model relates to the field of metering box technology, specifically to an anti-theft metering box, comprising a box body, a column fixed in the middle of the box body, and a door rotatably connected to the front of the box body. The column has several horizontally retractable latches inside; the inside of the door has a locking slot corresponding to the position of the latches. When the door is closed, the latches engage with the locking slots to lock. The door has a locking mechanism, including a pressure plate, a lock cylinder that drives the pressure plate, and a lock bar; the pressure plate surface has two triggers, and the inner wall of the door has contact sensors matching the positions of the triggers. The multiple horizontally retractable latches inside the column cooperate with the door locking slots to form a multi-point locking structure, significantly improving the protection capability compared to traditional single locks. The wedge-shaped structure at the end of the latches tightly engages with the trapezoidal groove locking slot, effectively resisting external prying. Even if a part of the structure is damaged, the remaining latches remain locked.

Description

Technical Field

[0001] This utility model relates to the field of metering box technology, specifically to an anti-theft metering box. Background Technology

[0002] In the field of electricity metering, metering boxes, as key equipment for electricity measurement, directly affect the stable operation of the power system and the economic benefits of power supply companies. However, traditional metering boxes currently on the market generally suffer from insufficient anti-theft capabilities: on the one hand, most metering boxes use a single lock structure with few locking points and low lock cylinder protection levels, making them easy for criminals to illegally open by prying the lock or breaking the box, thus tampering with metering data or stealing electricity; on the other hand, existing anti-theft devices mostly rely on a single sensor to trigger alarms, which are prone to false alarms due to vibration, accidental triggering, etc., and lack an effective legitimate opening identification mechanism, meaning that alarms may be triggered even during normal operation by maintenance personnel, affecting work efficiency. Furthermore, traditional metering boxes have low precision in their locking tongue and latch engagement, which can easily loosen or jam after prolonged use. This not only reduces locking reliability but may also cause alarm failure due to structural deformation during unauthorized opening. These problems make it difficult to detect and stop electricity theft in a timely manner, resulting in significant energy loss and increasing the operation and maintenance costs and management difficulties for power companies. Therefore, there is an urgent need for an anti-theft metering box with high security, low false alarm rate, and reliable structure to address these pain points.

[0003] Therefore, there is an urgent need for an anti-theft electricity metering box to improve the shortcomings of existing technologies. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-theft electricity metering box. Multiple horizontally retractable latches within the upright engage with the door lock to form a multi-point locking structure, significantly improving the protective capability compared to traditional single-lock devices. The wedge-shaped structure at the end of the latches tightly engages with the trapezoidal groove lock, effectively resisting external prying. Even if a part of the structure is damaged, the remaining latches remain locked, greatly reducing the possibility of unauthorized opening, thus solving the problems mentioned in the background art, namely: Traditional metering boxes currently on the market generally suffer from insufficient anti-theft capabilities: most metering boxes use a single lock structure with few locking points and low lock cylinder protection levels. Existing anti-theft devices mostly rely on a single sensor to trigger alarms, which are prone to false alarms due to factors such as vibration and accidental touches. At the same time, they lack an effective legitimate opening identification mechanism, which means that alarms may be triggered even during normal operation by maintenance personnel, affecting work efficiency.

[0005] To achieve the above objectives, this utility model provides an anti-theft electricity metering box, including a box body, a column fixed in the middle of the box body, and a door rotatably connected to the front of the box body. The column is provided with several horizontally retractable locking tongues. The inner side of the cabinet door is provided with a locking slot corresponding to the position of the locking tongue. When the cabinet door is closed, the locking tongue engages with the locking slot to lock the door. The door is equipped with a locking mechanism, including a pressure plate, a lock cylinder for driving the pressure plate to move, and a lock bar; The lock cylinder drives the lock bar to move linearly through gear meshing, pushing the pressure plate towards the inner wall of the door. The pressure plate surface is provided with two triggers, and the inner wall of the box door is provided with a contact sensor that matches the position of the triggers; When the device is legally opened, the pressure plate moves, causing both triggers to contact the sensor simultaneously, triggering the false alarm prevention signal. When the device is opened abnormally, the pressure plate does not move, causing the trigger and sensor to not make contact, thus triggering the alarm mechanism.

[0006] In the above technical solution, when the door is closed, several latches inside the pillar extend horizontally and engage with corresponding lock slots on the inside of the door, forming multi-point locking. When legally opened, the lock cylinder rotates, driving the lock bar to move linearly, pushing the pressure plate along the slide bar towards the inner wall of the door. This causes two triggers on the pressure plate surface to simultaneously contact their corresponding contact sensors, triggering a false alarm signal. When improperly opened, the lock cylinder does not move, preventing the pressure plate from moving, and the triggers remain separated from the contact sensors, thus triggering the alarm mechanism. Furthermore, the latches are connected to the pillar via compression springs, allowing for automatic reset after unlocking. The reset spring on the slide bar then drives the pressure plate back to its initial position, ensuring accurate and effective locking the next time.

[0007] Based on this, when the door is closed, several latches, evenly distributed along the height direction inside the pillar, extend horizontally. The wedge-shaped structure at their ends engages with the trapezoidal groove lock mouth at the corresponding position on the inside of the door, thus locking. When legally opened, the lock cylinder drives the lock bar to move linearly through gear engagement. Since one end of the lock bar is connected to the gear of the lock cylinder and the other end is hinged to the bottom of the pressure plate that is slidably connected to the slide rod, it pushes the pressure plate to move along the slide rod towards the inner wall of the door. At this time, the return spring sleeved on the slide rod is compressed, completing the unlocking operation. After unlocking, the return spring rebounds, causing the pressure plate to automatically reset along the slide rod, and the latches also reset, waiting for the next locking.

[0008] In another technical solution, the trigger is a mechanical micro switch, and the contact sensor is a conductive contact. Two micro switches are connected in series to the power-off circuit of the alarm mechanism. When they are closed at the same time, the alarm circuit is disconnected. The latch is connected to the inner wall of the column through a spring. When the pressure plate pushes the latch, it compresses the spring. After unlocking, the spring drives the latch to reset. The alarm mechanism includes an audible and visual alarm and a wireless communication module.

[0009] In this technical solution, the latch is connected to the inner wall of the column via a spring. When legally opened, the pressure plate pushes the latch to compress the spring, thus unlocking it. After unlocking, the spring drives the latch to reset. Two triggers, acting as mechanical microswitches, work in conjunction with a contact sensor, which acts as a conductive contact. The two microswitches are connected in series to the power-off circuit of the alarm mechanism. When legally opened, causing both triggers to simultaneously contact the sensor, the microswitches close simultaneously, disconnecting the alarm circuit and preventing false alarms. When abnormally opened, the triggers and sensors do not contact each other, the microswitches do not close, the alarm circuit is activated, the audible and visual alarm is triggered, and alarm information is sent via the wireless communication module.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This anti-theft electricity metering box uses multiple horizontally retractable latches inside the column to engage with the door lock, forming a multi-point locking structure that significantly improves protection compared to traditional single locks. The wedge-shaped structure at the end of the latches tightly engages with the trapezoidal groove lock, effectively resisting external prying. Even if a part of the structure is damaged, the remaining latches remain locked, greatly reducing the possibility of unauthorized opening. The locking mechanism of the cabinet door only triggers the anti-false alarm signal when the door is legally opened. This mechanism drives the lock cylinder to move the lock bar and the pressure plate, causing both triggers to simultaneously contact the sensors. This dual verification mechanism completely solves the problem of false alarms caused by traditional single sensors, while also ensuring that in cases of abnormal opening, such as forced entry or prying, the triggers and sensors do not come into contact, thus accurately triggering the alarm mechanism. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the embodiment; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the embodiment; Figure 3 This is a schematic diagram of the column structure in an embodiment; Figure 4 for Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a schematic diagram of the locking mechanism structure in an embodiment; Figure 6 This is a cross-sectional structural diagram of the locking mechanism layout in an embodiment.

[0012] The meanings of the labels in the diagram are as follows: 100. Box body; 110. Column; 111. Compression spring; 112. Locking tongue; 120. Box door; 130. Alarm mechanism; 140. Locking mechanism; 141. Lock cylinder; 142. Lock bar; 143. Pressure plate; 144. Slide bar; 145. Return spring; 150. Trigger; 160. Locking port. Detailed Implementation

[0013] 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.

[0014] Currently available traditional metering boxes generally suffer from insufficient anti-theft capabilities: most use a single lock structure with few locking points and a low protection level (141) for the lock cylinder. Existing anti-theft devices often rely on a single sensor to trigger alarms, which are prone to false alarms due to vibration, accidental activation, etc. Furthermore, they lack an effective legitimate opening identification mechanism, meaning that alarms may be triggered even during normal operation by maintenance personnel, impacting work efficiency. Please refer to [link / reference needed]. Figures 1-6 As shown, this embodiment provides an anti-theft electricity metering box, including a box body 100, a column 110 fixed in the middle of the box body 100, and a box door 120 rotatably connected to the front of the box body 100. The column 110 is provided with several horizontally retractable locking tongues 112. The inside of the door 120 is provided with a locking slot 160 corresponding to the position of the locking tongue 112. When the door 120 is closed, the locking tongue 112 engages with the locking slot 160 to lock it. The door 120 is provided with a locking mechanism 140, which includes a pressure plate 143, a lock cylinder 141 that drives the pressure plate 143 to move, and a lock bar 142. The lock cylinder 141 drives the lock bar 142 to move linearly through gear meshing, pushing the pressure plate 143 to move towards the inner wall of the box door 120; The pressure plate 143 is provided with two triggers 150 on its surface, and the inner wall of the door 120 is provided with a contact sensor that matches the position of the triggers 150. When the device is legally opened, the pressure plate 143 moves to make the two triggers 150 contact the sensor simultaneously, triggering the anti-false alarm signal. When the device is opened abnormally, the pressure plate 143 does not move, causing the trigger 150 to not contact the sensor, thus triggering the alarm mechanism 130.

[0015] In practice, when the door 120 is closed, several horizontally retractable latches 112 inside the column 110 will engage with the corresponding lock slots 160 on the inside of the door 120 to achieve locking. When legally opened, the lock cylinder 141 on the door 120 drives the lock bar 142 to move linearly through gear engagement, thereby pushing the pressure plate 143 to move towards the inner wall of the door 120. This causes the two triggers 150 on the surface of the pressure plate 143 to simultaneously contact the contact sensors on the inner wall of the door 120 that match their positions, thus triggering the anti-false alarm signal. However, when abnormally opened, the pressure plate 143 does not move, causing the triggers 150 to be unable to contact the sensors. At this time, the alarm mechanism 130 will be triggered, thus solving the problems of insufficient anti-theft capability and easy false alarms in traditional metering boxes.

[0016] See Figures 2-4 As shown, when the anti-theft electricity metering box is in operation, several locking tongues 112, which are equidistantly distributed along the height direction inside the column 110, will have their wedge-shaped ends engaged with the corresponding trapezoidal groove lock openings 160 on the inner side of the box door 120 to achieve locking. When legally opened, the lock cylinder 141 drives the lock bar 142, which is connected to the gear at one end and hinged to the bottom of the pressure plate 143 at the other end, to move linearly through gear meshing. This pushes the pressure plate 143, which is slidably connected to the slide rod 144 fixed at both ends to the box door 120, to move towards the inner wall of the box door 120. At this time, the return spring 145 sleeved on the slide rod 144 is compressed. After unlocking, the return spring 145 drives the pressure plate 143 to automatically reset along the slide rod 144, and the locking tongues 112 also reset accordingly, waiting for the next locking operation.

[0017] Figure 5 When legally opened, the lock cylinder 141 drives the lock bar 142, which is connected to the gear at one end and hinged to the bottom of the pressure plate 143 at the other end, to move linearly. This causes the pressure plate 143, which is slidably connected to the slide bar 144 fixed at both ends to the door 120, to move towards the inner wall of the door 120. At this time, the return spring 145 sleeved on the slide bar 144 is compressed. At the same time, the pressure plate 143 pushes the latch 112, which is connected to the inner wall of the column 110 by a spring, so that the spring is compressed to unlock. After unlocking, the return spring 145 drives the pressure plate 143 to automatically reset along the slide bar 144, and the latch 112 also resets under the action of the spring connected to it. The alarm mechanism 130 includes an audible and visual alarm and a wireless communication module, which are used to play an alarm role when abnormal opening occurs.

[0018] Additionally, see Figure 6As shown, trigger 150 is a mechanical micro switch, and the contact sensor is a conductive contact. The two micro switches are connected in series to the power-off circuit of alarm mechanism 130. When legally opened, the relevant components drive the pressure plate 143 to move, so that the two micro switches simultaneously contact the conductive contact and close, thereby disconnecting the alarm circuit and avoiding false alarms. When abnormal opening or other situations occur, the micro switches do not contact the sensor and are in the open state, the alarm circuit is turned on, the audible and visual alarm is activated, and the wireless communication module sends alarm information.

[0019] In this embodiment, when the anti-theft electricity metering box is in use, firstly, when the box door 120 is closed, several locking tongues 112, which are equidistantly distributed along the height direction inside the column 110, extend horizontally through the connection between the column 110 and the inner wall of the column 110 via springs. The wedge-shaped structure at the end of the tongues engages with the trapezoidal groove lock 160 at the corresponding position inside the box door 120, forming a stable lock. When legally opened, the lock cylinder 141 drives the lock bar 142, which is connected to the gear at one end and hinged to the bottom of the pressure plate 143 at the other end, to move linearly. This pushes the pressure plate 143, which is slidably connected to the slide bar 144 fixed at both ends to the door 120, to move towards the inner wall of the door 120. At this time, the return spring 145 sleeved on the slide bar 144 is compressed, with one end abutting against the pressure plate 143 and the other end abutting against the door 120. At the same time, the pressure plate 143 pushes the lock tongue 112 to compress the spring and unlock. After unlocking, the return spring 145 rebounds and drives the pressure plate 143 to reset along the slide bar 144. The lock tongue 112 also resets under the action of the spring connected to it. Two triggers 150, acting as mechanical microswitches, cooperate with a contact sensor, which serves as a conductive contact. The two microswitches are connected in series to the power-off circuit of the alarm mechanism 130, which includes an audible and visual alarm and a wireless communication module. When a legitimate opening causes the pressure plate 143 to move, and both triggers 150 simultaneously contact the sensor, the microswitches close simultaneously, disconnecting the alarm circuit and preventing false alarms. When an abnormal opening causes the pressure plate 143 to remain stationary, and the triggers 150 do not contact the sensor, the microswitches remain open, the alarm circuit is activated, the audible and visual alarm is triggered, and alarm information is sent via the wireless communication module.

[0020] 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 electricity metering box, comprising a box body (100), a column (110) fixed in the middle of the box body (100), and a box door (120) rotatably connected to the front of the box body (100), characterized in that: The column (110) is equipped with several horizontally retractable locking tongues (112). The inner side of the box door (120) is provided with a lock slot (160) corresponding to the position of the lock tongue (112). When the box door (120) is closed, the lock tongue (112) is engaged in the lock slot (160) to achieve locking. The door (120) is provided with a locking mechanism (140), including a pressure plate (143), a lock cylinder (141) for driving the pressure plate (143) to move, and a lock bar (142). The lock cylinder (141) drives the lock bar (142) to move linearly through gear meshing, pushing the pressure plate (143) to move towards the inner wall of the box door (120); The pressure plate (143) is provided with two triggers (150) on its surface, and the inner wall of the box door (120) is provided with a contact sensor that matches the position of the triggers (150); When the device is legally opened, the pressure plate (143) moves to make the two triggers (150) contact the sensor simultaneously, triggering the anti-false alarm signal; When the device is opened abnormally, the pressure plate (143) does not move, causing the trigger (150) to not contact the sensor, thus triggering the alarm mechanism (130).

2. The electricity tamper-proof meter box according to claim 1, characterized in that: Several of the aforementioned latches (112) are equidistantly distributed along the height direction of the post (110), and the end of each latch (112) is a wedge-shaped structure, with the lock opening (160) being a matching trapezoidal groove.

3. The electricity tamper-proof meter box according to claim 1, characterized in that: The pressure plate (143) is slidably connected to the slide rod (144), and both ends of the slide rod (144) are fixed to the door (120); one end of the lock bar (142) is connected to the gear of the lock cylinder (141), and the other end is hinged to the bottom of the pressure plate (143).

4. The electricity larceny preventing meter box according to claim 3, characterized in that: A reset spring (145) is fitted on the slide bar (144). One end of the reset spring (145) abuts against the pressure plate (143), and the other end abuts against the door (120), which is used for the automatic reset of the pressure plate (143).

5. The electricity tamper-proof meter box according to claim 1, wherein: The trigger (150) is a mechanical micro switch, and the contact sensor is a conductive contact. The two micro switches are connected in series to the power-off circuit of the alarm mechanism (130), and the alarm circuit is disconnected when they are closed at the same time.

6. The electricity tamper-resistant meter box of claim 1, wherein: The latch (112) is connected to the inner wall of the column (110) via a compression spring (111); when the pressure plate (143) pushes the latch (112), it compresses the spring (111), and after unlocking, the spring drives the latch (112) to reset.

7. The electricity tamper-proof meter box according to claim 1, wherein: The alarm mechanism (130) includes an audible and visual alarm and a wireless communication module.

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