Anti-cheating entry structure of electronic scale calibration mode
By setting a locking post and anti-tamper device between the upper and lower shells of the electronic scale, combined with the design of the inner and outer connectors, and hiding the short-circuit interface of the circuit board, the problem of merchants illegally entering the calibration mode is solved, achieving the effects of preventing cheating and facilitating maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-25
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, merchants can easily open the electronic scale casing and enter calibration mode through the short-circuit interface on the circuit board to change the weighing display reading, lacking effective protective measures.
An anti-cheating access structure for the calibration mode of an electronic scale was designed. By setting a locking post and an anti-tampering device between the upper and lower shells of the electronic scale, combined with the design of the inner and outer connectors, the circuit board short-circuit interface is hidden. A recessed connector seat and connector cover are set at the outer connector to increase the difficulty for merchants to access the scale, while facilitating maintenance by the manufacturer.
It effectively prevents merchants from modifying weighing data through illegal means, ensuring weighing accuracy, while also facilitating calibration and maintenance by manufacturers and reducing the occurrence of illegal operations.
Smart Images
Figure CN224095256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to electronic scales, and more particularly to an anti-cheating access structure for the calibration mode of an electronic scale. Background Technology
[0002] An electronic scale is a measuring tool that uses electronic technology and sensor principles to measure the weight of objects. It is frequently used in the buying and selling of various agricultural products and goods that require weighing. To ensure the accuracy of the weighing readings, electronic scales undergo weight calibration at the factory. There are generally two forms of weight calibration: the first is entering calibration mode through the setting button on the display screen, and the second is entering calibration mode through the short-circuit interface on the circuit board.
[0003] Some unscrupulous merchants, seeking extra profits, sometimes cheat by illegally calibrating or modifying electronic scales. This involves entering calibration mode and altering the weighing data to make the actual weight of the item differ from the displayed weight, thus profiting from the discrepancy. To address this, some manufacturers have blocked merchants from accessing calibration mode via a button, preventing unauthorized access. However, there are currently no effective safeguards against merchants opening the scale casing and entering calibration mode through a short-circuit interface on the circuit board, thus requiring improvement. Summary of the Invention
[0004] This invention addresses the shortcomings of existing technologies, such as the ability for merchants to easily open the outer casing of electronic scales and enter calibration mode through the short-circuit interface on the circuit board to alter the weighing display reading. It provides a new anti-cheating access structure for electronic scale calibration mode.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] An anti-cheating access structure for an electronic scale calibration mode includes an upper casing, a lower casing, and a circuit board. The upper and lower casings have inner and outer surfaces. The circuit board is located on the inner surface of the lower casing and has a short-circuit interface. A locking post extends from the inner surface of the upper casing towards the lower casing, with its outer end penetrating outward from the inner surface and reaching the outer surface. A locking hole is provided at the point where the locking post extends beyond the outer surface of the lower casing. An anti-tamper device is provided at the locking hole to prevent the upper and lower casings from being opened. A short-circuit interface is provided on the lower casing. The short-circuit docking device includes an inner connector and an outer connector that are interconnected. The inner connector faces the upper shell of the electronic scale, and the outer connector faces the lower shell of the electronic scale. The short-circuit interface is connected to the inner connector via a line. A removable connector cover is provided on the outer side of the lower shell of the electronic scale, which covers the outer connector. The lower shell of the electronic scale also has a recessed connecting seat recessed inward at the outer connector. The recessed connecting seat has an outer connector connecting channel. The upper part of the outer connector connecting channel is covered by the connector cover, and the lower part of the outer connector connecting channel communicates with the short-circuit docking device.
[0007] The locking pin of the upper shell of the electronic scale extends to the outer side of the lower shell, structurally connecting the upper and lower shells. The locking hole on the locking pin works in conjunction with the anti-tamper device to lock the upper and lower shells together, making them impossible to disassemble without violent damage, thus preventing merchants from opening the electronic scale shell at will.
[0008] Conversely, to facilitate calibration by manufacturers, this solution extends the short-circuit interface on the circuit board to the inner connector, and then to the outer connector. This allows manufacturers to enter calibration mode without breaking the tamper-proof device to open the scale casing, facilitating maintenance. Simultaneously, this solution also considers the possibility of merchants using the outer connector to enter calibration mode. Therefore, a recessed connector is incorporated at the outer connector, with a connecting channel within it. This recesses the outer connector into the scale's lower casing, increasing the difficulty for merchants to access it. Furthermore, without the specialized tools typically available to manufacturers, merchants cannot easily access the connecting channel to short-circuit the outer connector. This achieves an anti-cheating access structure that prevents merchants from cheating while facilitating manufacturer access to calibration mode for maintenance. Additionally, a connector cover is provided on the outer connector connecting channel to conceal it, better adapting to the daily use needs of the scale.
[0009] As a preferred embodiment, the anti-cheating entry structure for the above-described electronic scale calibration mode includes an anti-tampering device comprising an anti-tampering fastener and a locking rope. The anti-tampering fastener has a fastener through-hole, and the locking rope passes through the locking hole and the fastener through-hole to connect the outer end of the locking post and the anti-tampering fastener. A lead seal is provided at the fastener through-hole.
[0010] Preferably, in the anti-cheating access structure of the above-described electronic scale calibration mode, the outer connector connection channel includes an upper part, a middle part, and a lower part, which are arranged from top to bottom with increasing widths. The width of the outer connector is greater than the width of the upper part of the channel.
[0011] Preferably, in the anti-cheating access structure of the above-described electronic scale calibration mode, the width of the upper part of the channel is greater than 3mm and less than 4mm, and the width of the outer connector is greater than 4mm and less than 6mm.
[0012] Preferably, the anti-cheating entry structure of the above-described electronic scale calibration mode further includes a short-circuit calibration workpiece. The short-circuit calibration workpiece includes two symmetrically arranged rotating parts, which are hinged together to form a hinge portion. The rotating parts form a hand-held portion above the hinge portion and a contact portion below the hinge portion. The short-circuit calibration workpiece cooperates with the outer connector connection channel to form an insertion position and a contact position. In the insertion position, the two contact portions approach each other and the total width of the two contact portions is less than the width of the upper part of the channel. In the contact position, the two contact portions separate from each other and each contacts the two pins of the outer connector.
[0013] Preferably, in the anti-cheating access structure of the above-described electronic scale calibration mode, the lower part of the touch part is further extended outward, and the two pins of the outer connector form an included angle A, the angle of which is 20°~40°, and the opening of the included angle A faces the upper part of the channel. In the touch position, the two touch parts are separated from each other and the extended parts on the touch parts touch the two pins of the outer connector respectively.
[0014] As a preferred embodiment, the anti-cheating entry structure for the calibration mode of the electronic scale described above further includes an outer connecting seat and an inner connecting seat arranged vertically. The outer connecting connector is disposed within the outer connecting seat, and the inner connecting connector is disposed within the inner connecting seat. The upper part of the outer connecting seat is connected to the lower part of the channel. A snap hook is provided on the recessed connecting seat, and the snap hook hooks onto the lower part of one side of the outer connecting seat.
[0015] Preferably, in the anti-cheating access structure of the above-described electronic scale calibration mode, the circuit board is further provided with a docking seat at the short-circuit interface. The docking seat is provided with a docking cavity, and the short-circuit interface is located in the docking cavity. It also includes a short-circuit plug, which is provided with a short-circuit plug adapted to the short-circuit interface. The short-circuit plug is inserted into the docking cavity and connected to the short-circuit interface. The short-circuit plug is also provided with a downward-facing barb, and the docking seat is provided with a groove. The short-circuit plug engages with the docking seat through the barb and the groove.
[0016] Preferably, the anti-cheating access structure for the calibration mode of the electronic scale described above also includes a locking screw, which locks the connector cover plate to the outer side of the lower shell of the electronic scale.
[0017] This solution has the following beneficial effects:
[0018] 1. This solution, through the cooperation of anti-tamper devices and locking holes, can prevent merchants from directly opening the electronic scale casing and accessing the short-circuit interface on the circuit board. If the anti-tamper device is damaged, it indicates that the merchant has most likely cheated, which helps to quickly identify cheating merchants.
[0019] 2. This solution, through the recessed connector, the external connector channel, and the short-circuit docking device, can lead the short-circuit interface on the circuit board to the lower shell of the electronic scale, making it convenient for the manufacturer to enter the calibration mode for maintenance and debugging. At the same time, since merchants do not have the same professional tools as the manufacturer and cannot effectively access the external connector, it can effectively prevent merchants from cheating through the external connector.
[0020] 3. The coordination between the structural settings of the upper, middle, and lower parts of the channel, the structural settings of the outer connector, and the structural settings of the short-circuit calibration workpiece further increases the difficulty for merchants to access the outer connector, thus achieving a better anti-cheating effect. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a schematic diagram of a partial structure of the outer side of the lower shell of the electronic scale in this utility model. Figure 1 ;
[0023] Figure 3 This is a partial cross-sectional view of the present invention;
[0024] Figure 4 This is a schematic diagram of the structure of the lower shell of the electronic scale in this utility model;
[0025] Figure 5This is a schematic diagram of a partial structure of the outer side of the lower shell of the electronic scale in this utility model. Figure 2 ;
[0026] Figure 6 This is a schematic diagram of a partial structure of the inner side of the lower shell of the electronic scale in this utility model. Figure 1 ;
[0027] Figure 7 This is a structural schematic diagram illustrating the recessed connecting seat and the short-circuit docking device in this utility model;
[0028] Figure 8 This is a schematic diagram illustrating the structure of the short-circuit calibration workpiece in the insertion position in this utility model;
[0029] Figure 9 This is a schematic diagram illustrating the structure of the short-circuit calibration workpiece in the contact position in this utility model;
[0030] Figure 10 This is a schematic diagram illustrating the structure of the recessed connecting seat hooking onto the outer connecting seat body in this utility model;
[0031] Figure 11 This is an exploded structural diagram of the circuit board and short-circuit connector in this utility model;
[0032] Figure 12 This is a schematic diagram of the circuit board and short-circuit connector in this utility model.
[0033] Explanation of reference numerals in the attached figures
[0034] 100. Electronic scale lower housing; 110. Connector cover plate; 120. Recessed connector seat; 121. Snap-fit hook; 130. Outer connector connection channel; 131. Upper part of the channel; 132. Middle part of the channel; 133. Lower part of the channel; 140. Locking screw; 200. Short-circuit docking device; 210. Inner connector; 220. Outer connector; 230. Outer connecting seat; 240. Inner connecting seat; 300. Circuit board; 310. Short-circuit interface; 320. Connector 321. Seat; 330. Docking cavity; 400. Groove; 430. Anti-tamper device; 431. Anti-tamper fastener; 432. Fastener through hole; 433. Lead seal part; 440. Locking rope; 500. Short-circuit calibration workpiece; 510. Rotating part; 520. Hinge part; 530. Handheld part; 540. Contact part; 550. Extension part; 600. Short-circuit plug; 610. Short-circuit plug; 620. Barb; 700. Electronic scale upper shell; 710. Locking post; 720. Locking hole. Detailed Implementation
[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but these are not intended to limit the present invention:
[0036] An anti-cheating access structure for an electronic scale calibration mode includes an upper casing 700, a lower casing 100, and a circuit board 300. The upper casing 700 and lower casing 100 have inner and outer surfaces. The circuit board 300 is disposed on the inner surface of the lower casing 100 and has a short-circuit interface 310. A locking post 710 extends from the inner surface of the upper casing 700 toward the lower casing 100. The outer end of the locking post 710 penetrates outward from the inner surface of the lower casing 100 and reaches its outer surface. A locking hole 720 is provided at the point where the locking post 710 extends beyond the outer surface of the lower casing 100. An anti-tamper device 400 is provided at the locking hole 720 to prevent the upper casing 700 and lower casing 100 from being opened. A short-circuit interface 310 is provided on the lower casing 100. The short-circuit docking device 200 includes an inner connector 210 and an outer connector 220 connected to each other. The inner connector 210 faces the upper shell 700 of the electronic scale, and the outer connector 220 faces the lower shell 100 of the electronic scale. The short-circuit interface 310 is connected to the inner connector 210 via a line. A detachable connector cover plate 110 is provided on the outer side of the lower shell 100 of the electronic scale, which covers the outer connector 220. The lower shell 100 of the electronic scale also has a recessed connecting seat 120 recessed inward at the outer connector 220. The recessed connecting seat 120 has an outer connector connecting channel 130. The upper part of the outer connector connecting channel 130 is covered by the connector cover plate 110, and the lower part of the outer connector connecting channel 130 is connected to the short-circuit docking device 200.
[0037] There are two ways for merchants to cheat. One way is to forcibly damage the anti-tamper device 400, thereby opening the upper shell 700 and lower shell 100 of the electronic scale. This allows them to short-circuit the short-circuit interface 310 on the circuit board 300 to enter calibration mode and cheat. However, this method will inevitably damage the anti-tamper device 400, leaving obvious damage marks on the electronic scale, making it easily detectable and deterring many merchants from cheating. The other way is to open the connector cover 110 and enter the outer connector connection channel 130 of the recessed connector 120 to connect the outer connector 220. However, this operation is difficult for merchants who do not have the professional tools available to manufacturers, thus also deterring many merchants from cheating. This solution, however, allows manufacturers to enter calibration mode through the outer connector 220 without opening the upper shell 700 and lower shell 100 of the electronic scale, achieving both anti-cheating and facilitating maintenance and calibration for the manufacturer.
[0038] like Figure 2 As shown, preferably, the anti-tamper device 400 includes an anti-tamper fastener 430 and a locking rope 440. The anti-tamper fastener 430 is provided with a fastener through hole 431. The locking rope 440 passes through the locking hole 720 and the fastener through hole 431 to connect the outer end of the locking post 710 and the anti-tamper fastener 430. A lead seal part 432 is provided at the fastener through hole 431.
[0039] The interconnected locking ropes 440 and the sealing effect of the lead seal 432 effectively prevent merchants from tampering with the equipment. If a merchant cuts the locking rope 440, a portion of the rope will still be sealed by the lead seal 432, making it impossible to replace it with a new one, thus facilitating the identification of any signs of forced entry. Similarly, if a merchant damages the lead seal 432, it will be difficult to restore it afterward, thereby deterring any illegal activities by the merchant.
[0040] like Figure 7 , 8 As shown in Figure 9, preferably, the outer connector connecting channel 130 includes an upper channel 131, a middle channel 132, and a lower channel 133. The upper channel 131, the middle channel 132, and the lower channel 133 are arranged from top to bottom and their widths increase sequentially. The width of the outer connector 220 is greater than the width of the upper channel 131.
[0041] Preferably, the width of the upper part 131 of the channel is greater than 3 mm and less than 4 mm, and the width of the outer connector 220 is greater than 4 mm and less than 6 mm.
[0042] The passage 131, 132, and 133, with their widths increasing sequentially from top to bottom, and the upper part of the passage 131 having a width greater than 3mm and less than 4mm, make the inlet of the outer connector connecting passage 130 narrow, thereby preventing most everyday utensils from entering.
[0043] The gradually increasing channel middle section 132 and channel lower section 133, relative to the upper section 131, facilitate the setting of the outer connector 220. Since the outer connector 220, the inner connector 210, and the short-circuit interface 310 are each formed by two pins, and connecting the two pins will form a short circuit, this solution sets the distance between the two pins to be greater than 4mm and less than 6mm. On the one hand, this will not occupy too much internal space inside the lower shell 100 of the electronic scale. On the other hand, since the distance between the two pins is greater than the width of the upper section 131, even if the merchant uses a long tool such as a steel wire to enter the upper section 131, it will not be able to touch the two pins at the same time and cause a short circuit.
[0044] The upper part 131 of the channel can be circular, square, or other shapes, as long as the distance between the widest and narrowest parts of the upper part 131 is less than 4mm and greater than 3mm. The width of the upper part 131 can be, for example, 3.1mm, 3.5mm, or 3.9mm, and the distance between the two pins can be, for example, 4.1mm, 5mm, or 5.9mm. When setting it, ensure that the distance between the two pins is greater than the maximum width of the upper part 131 of the channel.
[0045] like Figure 8 , 9 As shown, preferably, it also includes a short-circuit calibration workpiece 500, which includes two symmetrically arranged rotating members 510. The two rotating members 510 are hinged to form a hinge portion 520. The rotating members 510 form a hand-held portion 530 above the hinge portion 520 and a contact portion 540 below the hinge portion 520. The short-circuit calibration workpiece 500 cooperates with the outer connector connection channel 130 to form an insertion position and a contact position. In the insertion position, the two contact portions 540 are close to each other and the total width of the two contact portions 540 is less than the width of the upper part 131 of the channel. In the contact position, the two contact portions 540 are separated from each other and each touches the two pins of the outer connector 220.
[0046] like Figure 7 , 8 As shown in Figure 9, preferably, the lower part of the contact portion 540 is further provided with an extension portion 550 extending outward. The two pins of the outer connector 220 form an included angle A, the angle of which is 20°~40°. The opening of the included angle A faces the upper part of the channel 131. In the contact position, the two contact portions 540 are separated from each other and the extension portions 550 on the contact portions 540 each contact the two pins of the outer connector 220.
[0047] This structural arrangement of the short-circuit calibration workpiece 500 allows the two rotating parts 510 to rotate around the hinge 520, thus bringing the two rotating parts 510 closer together or apart. When the manufacturer needs to recalibrate, the two rotating parts 510 are first brought together, thus forming an insertion position. In the insertion position, the overall width of the contact part 540 is smaller than the width of the upper channel 131, allowing the contact part 540 to smoothly pass through the upper channel 131 and the middle channel 132 to reach the lower channel 133. At this time, the manufacturer uses the handheld part 530 located outside the outer connector connecting channel 130 to rotate the two rotating parts 510 to separate them, and allows the contact parts 540 of the two rotating parts 510 to contact the two pins of the outer connector 220 respectively, thus forming a contact position.
[0048] The two pins of the outer connector 220 can also be configured with an included angle A, which further enhances its anti-cheating function. In this case, if the two rotating parts 510 of the short-circuit calibration workpiece 500 are merely separated from each other, it will be more difficult for the two contact parts 540 to simultaneously contact the two pins of the outer connector 220. However, by providing an extension part 550 at the lower part of the contact part 540, the extension part 550 can reach the two pins of the outer connector 220 through its extended length. The direction of the extension part 550 can be set horizontally and perpendicular to the unfolding direction of the two contact parts 540. The unfolding direction of the contact part 540 is consistent with the direction in which the two pins expand outward to form an included angle. This allows for a relatively larger setting space for the extension part 550, and when the contact position is formed, the extension part 550 can more accurately contact the two pins. In addition, when setting the extension 550, the issue of the extension 550 extending from the upper part of the channel 131 also needs to be considered. Therefore, the total length of the two extensions 550 in the extending direction should also be less than the width of the upper part of the channel 131, that is, less than 4mm.
[0049] like Figure 6 , 7 As shown in Figures 8, 9, and 10, preferably, the short-circuit docking device 200 further includes an outer connecting seat 230 and an inner connecting seat 240 arranged vertically. The outer connecting connector 220 is disposed inside the outer connecting seat 230, and the inner connecting connector 210 is disposed inside the inner connecting seat 240. The upper part of the outer connecting seat 230 is connected to the lower part of the channel 133. The recessed connecting seat 120 is provided with a snap hook 121, which hooks onto the lower part of one side of the outer connecting seat 230.
[0050] The structure of the outer connecting seat 230 and the inner connecting seat 240 can, on the one hand, protect the outer connector 220 and the inner connector 210, and on the other hand, the separate seat formed by the connection of the outer connecting seat 230 and the inner connecting seat 240 can be manufactured separately and then assembled into the lower part of the channel 133 through the outer connecting seat 230, thereby improving production efficiency. The recessed connecting seat 120 is provided with a snap hook 121, which can hook the lower part of the outer connecting seat 230 after it is inserted into the lower part of the channel 133, so that the short-circuit docking device 200 can be firmly connected to the lower part of the channel 133, preventing the electronic scale from falling due to the shaking caused by picking up and putting down the weighed object during use.
[0051] like Figure 11 , 12As shown, preferably, the circuit board 300 is further provided with a docking seat 320 at the short-circuit interface 310. The docking seat 320 is provided with a docking cavity 321. The short-circuit interface 310 is located in the docking cavity 321. It also includes a short-circuit plug 600. The short-circuit plug 600 is provided with a short-circuit plug 610 adapted to the short-circuit interface 310. The short-circuit plug 610 is inserted into the docking cavity 321 and connected to the short-circuit interface 310. The short-circuit plug 600 is also provided with a downwardly oriented barb 620. The docking seat 320 is provided with a groove 330. The short-circuit plug 600 engages with the docking seat 320 through the barb 620 and the groove 330.
[0052] This structural design allows the circuit board 300 to connect with the short-circuit interface 310 and the short-circuit socket 600, facilitating individual processing and subsequent assembly of the circuit board 300 and the short-circuit socket 600, thus improving production efficiency. The short-circuit socket 600, its short-circuit plug 610, and the barb 620 can be made of soft plastic. During insertion, the manufacturer can easily insert the barb 620 into the groove 330 with slight pressure, ensuring proper engagement and providing excellent fixation during the use of the electronic scale. When removal is required, the manufacturer can use their hand or pliers to press the barb 620 inwards, or remove the short-circuit socket 600 from the mating seat 320, facilitating maintenance and replacement.
[0053] The short-circuit plug 600 and the inner connector 210 of the short-circuit docking device 200 are connected to each other by wires. During assembly, the short-circuit plug 600 is directly plugged into the docking seat 320, and the short-circuit docking device 200 is directly plugged into the recessed connector 120, making assembly convenient and quick.
[0054] like Figure 2 , 3 As shown in Figure 5, preferably, a locking screw 140 is also included, which locks the connector cover 110 to the outer side of the lower housing 100 of the electronic scale. This ensures the stability of the connector cover 110 after it is tightened, and the locking screw 140 is also convenient to disassemble.
[0055] For manufacturers, the usage of this solution includes the following steps:
[0056] S1. Remove the connector cover plate 110 from the outer side of the lower shell 100 of the electronic scale to expose the outer connector connection channel 130.
[0057] S2. Take the short-circuit calibration workpiece 500 and place it in the insertion position. Then move the contact part 540 of the short-circuit calibration workpiece 500 downward until it reaches the bottom of the lower part 133 of the channel.
[0058] S3. Drive the hand-held part 530 of the short-circuit calibration workpiece 500 so that the two hand-held parts 530 rotate outward around the hinge part 520, thereby driving the two contact parts 540 or the extension part 550 on the contact part 540 of the short-circuit calibration workpiece 500 to contact the two pins of the outer connector 220 respectively, thereby forming a contact position.
[0059] S4. When a touch position is formed, if the current voltage V at the short-circuit interface 310 obtained by the circuit board 300 is less than or equal to the preset short-circuit voltage threshold, it is determined to be a short-circuit state.
[0060] S5. Keep the short-circuit calibration workpiece 500 in the touch position until it enters the short-circuit state for a time T that is greater than or equal to the preset minimum short-circuit time threshold and less than or equal to the preset maximum short-circuit time threshold. Then, move the short-circuit calibration workpiece 500 away from the touch position. At this time, the calibration mode is activated.
[0061] The short-circuit calibration workpiece 500 is made of a conductive material, such as metal, thus providing both conductivity and a certain strength. The short-circuit voltage threshold can be set to 0.2V, the minimum short-circuit time threshold to 2 seconds, and the maximum short-circuit time threshold to 4 seconds; alternatively, the minimum short-circuit time threshold can be set to 1 second, and the maximum short-circuit time threshold to 2 seconds. This establishes an additional threshold, meaning that a short-circuit contact is not simply a matter of a single touch, nor is the short-circuit state maintained for an extended period. Instead, the contact must be released within a certain timeframe before the calibration mode can be entered normally.
[0062] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.
Claims
1. An anti-cheating access structure for an electronic scale calibration mode, comprising an upper casing (700), a lower casing (100), and a circuit board (300), wherein the upper casing (700) and the lower casing (100) have inner and outer surfaces, the circuit board (300) is disposed on the inner surface of the lower casing (100), and the circuit board (300) is provided with a short-circuit interface (310), characterized in that: A locking post (710) is provided on the inner side of the upper shell (700) of the electronic scale extending towards the lower shell (100). The outer end of the locking post (710) penetrates outward from the inner side of the lower shell (100) and reaches the outer side of the lower shell (100). A locking hole (720) is provided on the locking post (710) beyond the outer side of the lower shell (100). An anti-tamper device (400) is provided at the locking hole (720) to prevent the upper shell (700) and the lower shell (100) of the electronic scale from being opened. A short-circuit connection device (200) is provided on the lower shell (100). The short-circuit connection device (200) includes an inner connector (210) and an outer connector (220) that are connected to each other. The inner connector (210) faces the electronic scale. The upper shell (700) has the outer connector (220) facing the lower shell (100) of the electronic scale. The short-circuit interface (310) is connected to the inner connector (210) via a line. A detachable connector cover plate (110) is provided on the outer side of the lower shell (100) of the electronic scale, which covers the outer connector (220). The lower shell (100) of the electronic scale also has an inwardly recessed connecting seat (120) at the outer connector (220). An outer connector connecting channel (130) is provided in the inwardly recessed connecting seat (120). The upper part of the outer connector connecting channel (130) is covered by the connector cover plate (110), and the lower part of the outer connector connecting channel (130) is connected to the short-circuit docking device (200).
2. The anti-cheating access structure for an electronic scale calibration mode according to claim 1, characterized in that: The anti-dismantling device (400) includes an anti-dismantling fastener (430) and a locking rope (440). The anti-dismantling fastener (430) is provided with a fastener through hole (431). The locking rope (440) passes through the locking hole (720) and the fastener through hole (431) to connect the outer end of the locking post (710) and the anti-dismantling fastener (430). A lead seal part (432) is provided at the fastener through hole (431).
3. The anti-cheating access structure for an electronic scale calibration mode according to claim 1, characterized in that: The outer connector connecting channel (130) includes an upper part (131), a middle part (132), and a lower part (133). The upper part (131), the middle part (132), and the lower part (133) are arranged from top to bottom and their widths increase sequentially. The width of the outer connector (220) is greater than the width of the upper part (131).
4. The anti-cheating access structure for an electronic scale calibration mode according to claim 3, characterized in that: The width of the upper part (131) of the channel is greater than 3 mm and less than 4 mm, and the width of the outer connector (220) is greater than 4 mm and less than 6 mm.
5. The anti-cheating access structure for an electronic scale calibration mode according to claim 3, characterized in that: It also includes a short-circuit calibration workpiece (500), which includes two symmetrically arranged rotating parts (510). The two rotating parts (510) are hinged together to form a hinge portion (520). The rotating parts (510) form a hand-held portion (530) above the hinge portion (520) and a contact portion (540) below the hinge portion (520). The short-circuit calibration workpiece (500) cooperates with the outer connector connection channel (130) to form an insertion position and a contact position. In the insertion position, the two contact portions (540) are close to each other and the total width of the two contact portions (540) is less than the width of the upper part (131) of the channel. In the contact position, the two contact portions (540) are separated from each other and each touches the two pins of the outer connector (220).
6. The anti-cheating access structure for the calibration mode of an electronic scale according to claim 5, characterized in that: The lower part of the contact part (540) is further provided with an extension part (550), and the two pins of the outer connector (220) form an included angle A, the angle of which is 20°~40°. The opening of the included angle A faces the upper part (131) of the channel. In the contact position, the two contact parts (540) are separated from each other and the extension part (550) on the contact part (540) touches the two pins of the outer connector (220) respectively.
7. The anti-cheating access structure for an electronic scale calibration mode according to claim 3, characterized in that: The short-circuit docking device (200) further includes an outer connecting seat (230) and an inner connecting seat (240) arranged vertically. The outer connecting head (220) is disposed inside the outer connecting seat (230), and the inner connecting head (210) is disposed inside the inner connecting seat (240). The upper part of the outer connecting seat (230) is connected to the lower part of the channel (133). The recessed connecting seat (120) is provided with a snap hook (121), which hooks onto the lower part of one side of the outer connecting seat (230).
8. The anti-cheating access structure for an electronic scale calibration mode according to claim 1, characterized in that: The circuit board (300) is also provided with a docking seat (320) at the short-circuit interface (310). The docking seat (320) is provided with a docking cavity (321). The short-circuit interface (310) is located in the docking cavity (321). It also includes a short-circuit plug (600). The short-circuit plug (600) is provided with a short-circuit plug (610) that is adapted to the short-circuit interface (310). The short-circuit plug (610) is inserted into the docking cavity (321) and connected to the short-circuit interface (310). The short-circuit plug (600) is also provided with a downward barb (620). The docking seat (320) is provided with a groove (330). The short-circuit plug (600) is engaged with the docking seat (320) through the barb (620) and the groove (330).
9. The anti-cheating access structure for an electronic scale calibration mode according to claim 1, characterized in that: It also includes a locking screw (140) that locks the connector cover (110) to the outer side of the lower housing (100) of the electronic scale.