High-precision sensor anti-cheating electronic scales for farmers' markets

Abstract

This utility model relates to a high-precision sensor anti-cheating electronic scale for farmers' markets, comprising an electronic scale body and a chip body disposed inside the electronic scale body. The electronic scale body has a detachable locking component connected to a sealing box for sealing the chip body, the locking component being located within the sealing box. In this application, the sealing box is fixed to the electronic scale body by a hidden locking component, completely sealing the chip, physically preventing prying and tampering, avoiding external contact to protect the chip's initial information, and ensuring the integrity of the electronic scale's daily weighing information. A hollow cylinder with a nozzle can instantly spray insulating ceramic powder when the sealing box is forcibly opened. Compared to traditional software encryption, this physical destruction design can directly damage the chip circuitry, making it unable to read or write initial information. Furthermore, the powder is difficult to clean and has a long-term impact on the chip, preventing illegal tampering at the source, improving chip information security, and reducing weighing inaccuracies.

Description

Technical Field

[0001] This utility model relates to a high-precision sensor anti-cheating electronic scale for farmers' markets, and in particular to a high-precision sensor anti-cheating electronic scale for farmers' markets applied in the field of electronic scales. Background Technology

[0002] The weighing accuracy of an electronic scale mainly depends on the initial information stored in its internal chip, including key data such as zero-point calibration value, linear correction parameters, and scale division value. This data is professionally calibrated and written into the chip before leaving the factory, and it is the basis for the electronic scale to achieve accurate weighing. Once the initial information is deviated or altered, it will directly lead to inaccurate weighing results, causing economic disputes, quality risks, and other problems.

[0003] Currently, electronic scales on the market have the following issues regarding the protection of initial chip information: On the one hand, most electronic scales only protect the chip through simple outer casing, lacking a dedicated locking and protection structure. External personnel can easily access the chip body through conventional illegal operations such as prying and disassembly, making it difficult to physically block the path of tampering with the initial chip information. This makes it impossible to provide reliable basic protection for the initial chip information, resulting in a significant risk to the integrity of the initial information during the daily use of electronic scales.

[0004] On the other hand, some electronic scales with protective functions rely solely on software encryption to protect chip data. This single protection method is easily cracked and cannot cope with physical tampering after forced disassembly. Even if the encryption is broken or the casing is forcibly opened, existing devices lack effective emergency protection mechanisms, cannot prevent unauthorized personnel from reading and writing the chip's initial information, and cannot physically restrict the chip's function. It is difficult to eliminate tampering from the root, ultimately leading to inaccurate weighing problems due to alteration of the chip's initial information. In view of this, this utility model is proposed. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the initial information protection of the electronic scale chip on the market is insufficient, or it relies on a simple outer shell without a locking structure, making it easy to pry open and access the chip, or it relies on easily cracked software encryption without emergency protection after forced opening, ultimately leading to inaccurate weighing due to information tampering.

[0006] To address the aforementioned issues, this utility model provides a high-precision sensor-based anti-cheating electronic scale for farmers' markets. The scale includes a main body and a chip housing located inside the main body. A locking mechanism is detachably connected to the inside of the main body to enclose the chip housing. This locking mechanism prevents the enclosure from being opened and altering the initial information of the chip housing. A hollow cylinder containing interfering powder is fixedly connected to the inside of the main body and located within the enclosure. A nozzle is provided on the hollow cylinder, pointing towards the chip housing. When the enclosure is forcibly opened to alter the initial information of the chip housing, the nozzle sprays the interfering powder from the hollow cylinder towards the chip housing.

[0007] As a further improvement of this application, the locking component includes a fixed frame and a locking block. The fixed frame is fixedly connected to the inside of the electronic scale body. The closed box covers the fixed frame, and the outer wall of the fixed frame is in contact with the inner wall of the closed box. A sliding groove is provided on the fixed frame, and a locking groove corresponding to the sliding groove is provided on the closed box. A locking block inserted into the locking groove is slidably connected in the sliding groove. A spring is provided in the sliding groove, one end of which is fixedly connected to the locking block, and the other end is fixedly connected to the inner wall of the sliding groove.

[0008] As a further improvement to this application, the upper surface of the locking block is inclined.

[0009] As a further improvement of this application, a storage battery and an alarm are fixedly installed inside the electronic scale body, and the alarm is electrically connected to the storage battery through a trigger unit.

[0010] As another improvement of this application, the triggering unit includes a detection cylinder and a slider slidably connected inside the detection cylinder. A second conductive ring is fixedly connected to the upper end face of the slider. A first conductive ring is fixedly installed on the inner wall of the detection cylinder. A connecting rod is fixedly connected to the closed box. One end of the connecting rod passes through the detection cylinder and abuts against the slider. A second spring is provided inside the detection cylinder. One end of the second spring is fixedly connected to the slider, and the other end is fixedly connected to the inner wall of the detection cylinder. The alarm is electrically connected to the battery through the second conductive ring and the first conductive ring.

[0011] As a further improvement to this application, the detection cylinder is provided with a jet chamber located above the slider, and the detection cylinder is provided with a first gas supply pipe and a second gas supply pipe connected to the jet chamber. The end of the second gas supply pipe away from the jet chamber is connected to the interior of the hollow cylinder.

[0012] As a further improvement to this application, the slider is made of a rubber stopper that fits against the inner wall of the detection cylinder.

[0013] As a further improvement to this application, a support plate is also included, which is detachably connected to the weighing end of the electronic scale body via a magnetic block, the magnetic block being fixedly connected to the lower end surface of the support plate.

[0014] In summary, in this application, the enclosed box is fixed inside the electronic scale body by a hidden locking component, which can completely seal the chip body, prevent external personnel from easily accessing the chip, and physically block conventional illegal operations such as prying and disassembly, providing basic protection for the chip's initial information and ensuring the integrity of the initial information during daily weighing of the electronic scale.

[0015] When the hollow cylinder is used in conjunction with the nozzle, it can automatically spray insulating ceramic powder the moment the sealed box is forcibly opened. Compared with the traditional protection method that relies solely on software encryption, this physical destructive design can directly damage the conductivity of the chip circuit, making the chip unable to read or modify the initial information normally. Moreover, once the powder enters the gaps inside the chip, it is difficult to clean completely and can affect the chip's function for a long time. This prevents illegal tampering from the root, greatly improves the security of the chip's initial information, and reduces weighing inaccuracies caused by information tampering. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the structure of the electronic scale body and the support plate according to the embodiments of this application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram showing the structure of the electronic scale body and the enclosed box according to the embodiments of this application;

[0018] Figure 3 This is a cross-sectional view of the enclosed box and the detection cylinder according to the embodiments of this application;

[0019] Figure 4 This is a schematic diagram of the structure of the enclosed box according to an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of the internal structure of the detection cylinder according to an embodiment of this application;

[0021] Figure 6 This is an implementation method of the present application. Figure 3 Enlarged view of section A;

[0022] Figure 7 This is a schematic diagram of the structure of the electronic scale according to the embodiments of this application;

[0023] Figure 8 This is a schematic diagram illustrating the structure of the electronic scale body and the support plate according to the embodiments of this application. Figure 2 .

[0024] Explanation of the labels in the diagram:

[0025] 1. Electronic scale body; 101. Chip body; 102. Support plate; 103. Magnetic block; 2. Enclosed box; 201. Fixing frame; 202. Slide groove; 203. Locking block; 204. Spring one; 3. Alarm device; 301. Battery; 4. Detection cylinder; 401. Slider; 402. Spring two; 403. Connecting rod; 404. Conductive ring one; 405. Conductive ring two; 5. Hollow cylinder; 501. Nozzle; 502. Air supply pipe one; 503. Air supply pipe two. Detailed Implementation

[0026] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] Figure 1 , Figure 2 , Figure 4 , Figure 7 The diagram shows a high-precision sensor anti-cheating electronic scale for farmers' markets, comprising an electronic scale body 1 and a chip body 101 disposed inside the electronic scale body 1. A locking mechanism is detachably connected inside the electronic scale body 1 to a sealing box 2 for sealing the chip body 101. The locking mechanism is located inside the sealing box 2 to prevent the sealing box 2 from being opened and altering the initial information of the chip body 101. A hollow cylinder 5 containing interfering powder is fixedly connected inside the electronic scale body 1 and located within the sealing box 2. The hollow cylinder 5 contains insulating ceramic powder with a particle size of 5-10 μm. A nozzle 501 is provided on the hollow cylinder 5 facing the chip body 101. When the sealing box 2 is forcibly opened to alter the initial information of the chip body 101, the nozzle 501 sprays the interfering powder from the hollow cylinder 5 towards the chip body 101.

[0028] The sealed box 2 is fixed inside the electronic scale body 1 by a hidden locking component, completely sealing the chip body 101. This sealed design can effectively block regular illegal operations and prevent external personnel from easily touching the chip. The interference powder in the hollow cylinder 5 is in a static state and the nozzle 501 is not opened. At this time, the chip body 101 can read the initial information normally, ensuring the weighing accuracy of the electronic scale.

[0029] When someone forcibly pries or damages the locking components to open the sealed box 2, the structural integrity of the sealed box 2 is compromised, triggering the opening mechanism of the nozzle 501 of the hollow cylinder 5. Under pressure, the nozzle 501 sprays insulating ceramic powder toward the chip body 101. Compared with the traditional protection method that relies solely on encryption, this physical trigger design adds physical destruction protection, improves the security of the chip's initial information, and reduces the problem of inaccurate weighing caused by information tampering from the source.

[0030] After the insulating ceramic powder covers the chip body 101, it will damage the conductivity of the chip circuit, causing the chip to be unable to read or modify the initial information normally. At the same time, the powder enters the gaps inside the chip and may remain even after cleaning, affecting the normal operation of the chip. This completely prevents illegal tampering from a physical level and ensures that the electronic scale maintains its weighing accuracy in a long-term stable manner.

[0031] Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, the locking component includes a fixed frame 201 and a locking block 203. The fixed frame 201 is fixedly connected to the inside of the electronic scale body 1. The closed box 2 covers the fixed frame 201, and the outer wall of the fixed frame 201 is in contact with the inner wall of the closed box 2. A sliding groove 202 is provided on the fixed frame 201, and a locking groove corresponding to the sliding groove 202 is provided on the closed box 2. The locking block 203 is slidably connected in the sliding groove 202 and inserted into the locking groove. A spring 204 is provided in the sliding groove 202. One end of the spring 204 is fixedly connected to the locking block 203, and the other end is fixedly connected to the inner wall of the sliding groove 202.

[0032] When closing the enclosure 2, first press the end of the locking block 203 that extends out of the slide groove 202, causing the locking block 203 to compress the spring 204 and retract into the slide groove 202. Then, close the enclosure 2 onto the fixing frame 201. When the lower end of the enclosure 2 moves down beyond part of the slide groove 202, the locking block 203 can be released. Then, when the enclosure 2 is fully closed, the locking block 203 is aligned with the locking groove, the spring 204 returns to its original shape, and pushes the locking block 203 into the locking groove to complete the fixation. This achieves quick installation of the enclosure 2, eliminating the need for additional tools compared to traditional screw fixing. The use of movable screws increases installation efficiency and avoids the problem of easy screw removal, while strengthening the protective capabilities of the enclosed box 2. The elastic force of spring 204 continuously acts on the locking block 203, making the locking block 203 stably locked in the locking groove. Since the locking component is located inside the enclosed box 2, it is impossible for external tools to push the locking block 203 back. At the same time, the tight fit between the fixing frame 201 and the enclosed box 2 reduces the space for external prying, further improving the reliability of locking and effectively preventing unauthorized personnel from tampering with the initial information of the chip by disassembling the enclosed box 2, thus ensuring the stability of the weighing accuracy of the electronic scale.

[0033] Figure 6 As shown, the upper end face of the locking block 203 is inclined, and the inclined surface is polished.

[0034] When the closed box 2 is closed, its inner wall first contacts the inclined surface of the locking block 203. Due to the guiding effect of the inclined surface, the pressure of the closed box 2 is decomposed into a component force along the inclined surface, which pushes the locking block 203 to automatically retract into the slide groove 202. There is no need to manually press the locking block 203, which simplifies the installation operation and avoids installation difficulties caused by the locking block 203 blocking the installation. At the same time, the polishing treatment of the inclined surface reduces friction with the inner wall of the closed box 2, reduces component wear, and extends service life. Under the premise of ensuring the locking effect and preventing chip information tampering, the device's installation convenience and durability are improved.

[0035] Figure 1 , Figure 3 , Figure 7 As shown, a battery 301 and an alarm 3 are fixedly installed inside the electronic scale body 1. The alarm 3 is electrically connected to the battery 301 through a trigger unit. The alarm 3 is an audible and visual alarm, including a red LED light and a buzzer. The battery 301 is a 12V rechargeable lithium battery with a capacity of 2000mAh, which is connected in parallel with the main power module of the electronic scale and can provide power when the main power is cut off.

[0036] When the closed box 2 is closed, the trigger unit is not activated, the circuit between the alarm 3 and the battery 301 is disconnected, the alarm 3 does not work, avoiding unnecessary energy consumption, and does not affect the normal weighing operation of the electronic scale.

[0037] When the enclosure 2 is illegally opened, the trigger unit detects the status change and connects the circuit between the alarm 3 and the battery 301. The LED of the alarm 3 flashes at a frequency of 2Hz, and the buzzer emits a continuous alarm sound of 80dB. At the same time, the battery 301 is designed to ensure that the alarm 3 can still work normally when the main power is disconnected, so as to avoid the situation where there is no warning after the power is cut off.

[0038] The combination of sound and light warnings can effectively alert personnel in various environments such as noisy markets and dimly lit warehouses. Compared with single local warnings, the warning effect is more significant, which can promptly prevent illegal tampering and reduce economic losses caused by information tampering.

[0039] Figure 2 , Figure 3 , Figure 5As shown, the triggering unit includes a detection cylinder 4 and a slider 401 slidably connected inside the detection cylinder 4. A second conductive ring 405 is fixedly connected to the upper end face of the slider 401. A first conductive ring 404 is fixedly installed on the inner wall of the detection cylinder 4. A connecting rod 403 is fixedly connected to the closed box 2. One end of the connecting rod 403 passes through the detection cylinder 4 and abuts against the slider 401. A second spring 402 is provided inside the detection cylinder 4. One end of the second spring 402 is fixedly connected to the slider 401, and the other end is fixedly connected to the inner wall of the detection cylinder 4. The alarm 3 is electrically connected to the battery 301 through the second conductive ring 405 and the first conductive ring 404. The positive terminal of the alarm 3 is connected to the first conductive ring 404 through a wire, and the negative terminal is connected to the negative terminal of the battery 301. The positive terminal of the battery 301 is connected to the second conductive ring 405.

[0040] When the closed box 2 is closed, the connecting rod 403 pushes the slider 401 to compress the second spring 402. The slider 401 is located below the detection cylinder 4. The first conductive ring 404 and the second conductive ring 405 are not in contact, the circuit is broken, and the alarm 3 does not work. This triggering unit is combined with the circuit through a mechanical structure. Compared with electronic sensors, it has a simpler structure, lower cost, and is less susceptible to electromagnetic interference, reducing the overall cost of the device and the probability of failure, and ensuring the long-term stable operation of the electronic scale.

[0041] When the enclosed box 2 is opened, the connecting rod 403 moves with the enclosed box 2, the pressure on the slider 401 disappears, the second spring 402 returns to its original deformation, pushing the slider 401 to slide upward until the second conductive ring 405 contacts the first conductive ring 404, the circuit is connected, the alarm 3 is activated, the spring force of the second spring 402 is stable, which can ensure that the slider 401 is reset in time and ensure the reliability of triggering. At the same time, the rigid connection between the connecting rod 403 and the enclosed box 2 avoids false triggering caused by vibration, improves the accuracy of the warning, and can accurately remind on-site personnel to prevent illegal tampering and protect the initial information of the chip and the weighing accuracy of the electronic scale.

[0042] Figure 2 , Figure 3 , Figure 5 As shown, a jet chamber is provided inside the detection cylinder 4 above the slider 401, and the cavity wall is sealed. The detection cylinder 4 is provided with a first gas supply pipe 502 and a second gas supply pipe 503 connected to the jet chamber. The end of the second gas supply pipe 503 away from the jet chamber is connected to the interior of the hollow cylinder 5. Both the first gas supply pipe 502 and the second gas supply pipe 503 are PU hoses and are equipped with one-way valves to prevent gas leakage. A 0.1mm thick thin film sealing sheet is provided at the nozzle 501.

[0043] Before the electronic scale leaves the factory, compressed air is injected into the jet chamber through the air supply pipe 502. The one-way valve is closed, and the jet chamber is kept under high pressure. The one-way valve ensures that the jet chamber can maintain high pressure for a long time, avoids gas leakage that would lead to insufficient subsequent jetting force, ensures the reliability of the jetting effect, and provides stable power support for powder jetting in case of illegal opening.

[0044] When the sealed box 2 is opened, the slider 401 slides upward under the action of the second spring 402, squeezing the jet chamber and increasing the pressure inside the chamber. The high-pressure gas enters the hollow cylinder 5 through the second gas supply pipe 503, breaks through the thin film seal at the nozzle 501, and sprays the interference powder toward the chip body 101. The design of the jet chamber and the gas supply pipe transforms the opening action of the sealed box 2 into the driving force of the high-pressure gas, realizing the automatic spraying of interference powder without the need for an additional power source. The structure is compact and the cost is low.

[0045] Figure 5 As shown, the slider 401 is made of nitrile rubber stopper, which fits against the inner wall of the detection cylinder 4. The outer wall of the stopper is provided with two annular sealing grooves, and fluororubber O-rings are installed in the grooves to ensure a sealed fit with the inner wall of the detection cylinder 4.

[0046] As a rubber stopper, when the slider 401 slides inside the detection cylinder 4, the O-ring can effectively prevent the high-pressure gas in the jet chamber from leaking from the gap between the slider 401 and the inner wall of the detection cylinder 4, thus solving the problem of poor sealing performance of the slider 401, ensuring the sealing of the jet chamber in the initial state, and providing stable conditions for subsequent high-pressure jetting.

[0047] When slider 401 slides upward, it can fully compress the gas in the jet chamber, so that all the gas enters the hollow cylinder 5 through the gas supply pipe 503. This ensures that the interference powder can be sprayed onto the chip body 101 fully and accurately, avoiding the problem of insufficient spray force and incomplete powder coverage due to gas leakage. This further improves the reliability of physical protection. At the same time, the nitrile rubber material has good wear resistance, which can reduce the wear of slider 401 when it slides, extend the service life of slider 401, and reduce the frequency and cost of device maintenance.

[0048] Figure 7 , Figure 8 As shown, it also includes a support plate 102, which is detachably connected to the weighing end of the electronic scale body 1 via a magnetic block 103. The magnetic block 103 is fixedly connected to the lower end surface of the support plate 102. The support plate 102 is a stainless steel plate with a brushed surface for anti-slip treatment. A 2mm thick iron plate is set at the corresponding position of the weighing end of the electronic scale body 1, and the attraction force between the magnetic block 103 and the iron plate is 50N.

[0049] When installing the support plate 102, align the magnetic block 103 at its lower end with the iron plate at the weighing end of the electronic scale and fix it by magnetic attraction. When disassembling, apply an upward pulling force greater than 50N to separate it. This magnetic attraction connection of the magnetic block 103 is more convenient to install and disassemble than traditional screw fixing or snap-fit ​​connection, and facilitates the cleaning and replacement of the support plate 102 (such as when the support plate 102 is damaged or contaminated with oil). It reduces the situation where improper maintenance of the support plate 102 affects the use of the electronic scale and improves the ease of use of the device.

[0050] An object is placed on the support plate 102, and its weight is transmitted to the weighing sensor of the electronic scale through the support plate 102. The sensor converts the weight signal into an electrical signal, which is processed by the chip body 101 and the weighing result is displayed. The magnetic force of the magnetic block 103 is calibrated and compensated so as not to affect the accuracy of the weighing sensor. At the same time, the attraction force of the strong magnet 50N can ensure that the support plate 102 is stably fixed during the weighing process and will not shift due to object placement deviation or slight collision, thus ensuring the accuracy of the weighing signal transmission and thus ensuring the weighing accuracy of the electronic scale.

[0051] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A high-precision sensor anti-cheating electronic scale for a farmers market, characterized in that, The system includes an electronic scale body (1) and a chip body (101) disposed inside the electronic scale body (1). The electronic scale body (1) is connected to a sealing box (2) for sealing the chip body (101) by means of a locking component. The locking component is located in the sealing box (2) to prevent the sealing box (2) from being opened and the initial information of the chip body (101) from being tampered with. A hollow cylinder (5) containing interfering powder is fixedly connected inside the electronic scale body (1) and located in the closed box (2). A nozzle (501) is provided on the hollow cylinder (5) facing the chip body (101). When the sealed box (2) is forcibly opened to tamper with the initial information of the chip body (101), the nozzle (501) is used to spray the interference powder in the hollow cylinder (5) toward the chip body (101).

2. The high-precision sensor anti-cheating electronic scale for farmers' markets according to claim 1, characterized in that: The locking component includes a fixed frame (201) and a locking block (203). The fixed frame (201) is fixedly connected to the inside of the electronic scale body (1). The closed box (2) covers the fixed frame (201), and the outer wall of the fixed frame (201) is in contact with the inner wall of the closed box (2). The fixed frame (201) has a sliding groove (202), and the closed box (2) has a locking groove corresponding to the sliding groove (202). The locking block (203) is slidably connected in the sliding groove (202) and inserted into the locking groove. A spring (204) is provided in the sliding groove (202). One end of the spring (204) is fixedly connected to the locking block (203), and the other end is fixedly connected to the inner wall of the sliding groove (202).

3. The high precision sensor anti-cheating electronic scale for farmers' markets according to claim 2, characterized in that: The upper surface of the locking block (203) is inclined.

4. The high-precision sensor anti-cheating electronic scale for farmers' markets according to claim 1, characterized in that: The electronic scale body (1) is internally equipped with a storage battery (301) and an alarm (3), and the alarm (3) is electrically connected to the storage battery (301) through a triggering unit.

5. The high precision sensor anti-cheating electronic scale for farmers' markets according to claim 4, characterized in that: The triggering unit includes a detection cylinder (4) and a slider (401) slidably connected inside the detection cylinder (4). A conductive ring two (405) is fixedly connected to the upper end face of the slider (401). A conductive ring one (404) is fixedly installed on the inner wall of the detection cylinder (4). A connecting rod (403) is fixedly connected to the closed box (2). One end of the connecting rod (403) passes through the detection cylinder (4) and abuts against the slider (401). A spring two (402) is provided inside the detection cylinder (4). One end of the spring two (402) is fixedly connected to the slider (401), and the other end is fixedly connected to the inner wall of the detection cylinder (4). The alarm (3) is electrically connected to the battery (301) through the conductive ring two (405) and the conductive ring one (404).

6. The high precision sensor anti-cheating electronic scale for farmers' markets of claim 5, wherein: The detection cylinder (4) is provided with a jet chamber located above the slider (401). The detection cylinder (4) is provided with a first gas supply pipe (502) and a second gas supply pipe (503) connected to the jet chamber. The end of the second gas supply pipe (503) away from the jet chamber is connected to the interior of the hollow cylinder (5).

7. The high precision sensor anti-cheating electronic scale for farmers' markets according to claim 6, characterized in that: The slider (401) is made of a rubber stopper, which is in contact with the inner wall of the detection cylinder (4).

8. The high precision sensor tamper-proof electronic scale for farmers' markets of claim 1, wherein: It also includes a support plate (102), which is detachably connected to the weighing end of the electronic scale body (1) via a magnetic block (103), and the magnetic block (103) is fixedly connected to the lower end surface of the support plate (102).

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