Electronic scale anti-disassembly structure

Abstract

The utility model discloses an anti-disassembly structure of an electronic scale. The anti-disassembly structure comprises an electric signal transmission circuit, a separated level switch, a disassembly detection MCU, a main control unit, a display, a button, a power supply port, a standby power supply and an automatic switching circuit. According to the utility model, the disassembly detection MCU is electrically connected with the main control unit and the electric signal transmission circuit, and the separated level switch connected with the shell is arranged on the electric signal transmission circuit, so that the disassembly detection MCU can detect the level change on the electric signal transmission circuit when the shell is separated, thereby sending a locking signal to the main control unit; the main control unit is locked and generates the random string code to be displayed on the display, the string code needs to be decrypted into the secret key through the preset algorithm and then is input into the key of the electronic scale to unlock the main control unit, and compared with a traditional sensor module anti-disassembly scheme, the electronic scale anti-disassembly device is more reliable, saves electricity and is low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic scales, in particular to an anti-dismantling structure of an electronic scale. Background Art

[0002] Electronic scales are devices used for weighing. In order to prevent unscrupulous merchants from disassembling them privately, many electronic scales are equipped with anti-tampering devices. Currently, similar electronic scale anti-tampering solutions mostly add various detection sensor modules to the original electronic scales, such as RFID, through-beam infrared modules, through-beam photoelectric sensors and other sensors as detection devices. When the mainboard recognizes that the sensor signal is inconsistent with the expected, it is considered that the machine has been disassembled. At this time, the electronic scale mainboard makes a judgment. When disassembly is detected, an alarm signal is sent to the server through the 4G module or WIFI module.

[0003] Because the electronic scale's motherboard determines whether to disassemble the device, this solution has numerous drawbacks. When the scale loses power, the motherboard also loses power. If the device is disassembled at this point, the motherboard won't be able to detect the disassembly in time, making it unreliable. Another drawback is that modules like RFID, infrared, photoelectric, 4G, and Wi-Fi consume tens to hundreds of milliamperes of power during operation, making long-term operation more energy-intensive. Furthermore, these modules are costly. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an electronic scale anti-tampering device structure, the specific technical solution is:

[0005] An electronic scale anti-tampering device structure, the electronic scale includes a housing, the housing includes an upper housing and a lower housing, and the electronic scale anti-tampering device structure includes:

[0006] An electrical signal transmission circuit, disposed in the housing, for transmitting a level signal;

[0007] a separate level switch connected to the electrical signal transmission circuit, comprising a first trigger element provided on the upper housing and a second trigger element provided on the lower housing, so as to open or close the electrical signal transmission circuit when the upper housing and the lower housing are separated;

[0008] A disassembly detection MCU is disposed in the housing and electrically connected to the electrical signal transmission circuit, and is used to receive a level signal change and send a lock signal;

[0009] A main control unit is provided in the housing, electrically connected to the disassembly detection MCU, and is used to receive the lock signal and lock the machine;

[0010] a display, provided on the housing and electrically connected to the main control unit, for displaying a random string of codes after the main control unit receives a lock signal;

[0011] a button, provided on the housing and electrically connected to the main control unit, for inputting an unlocking key converted from the random string by a preset algorithm to unlock the main control unit;

[0012] A power supply port, electrically connected to the disassembly detection MCU or main control unit, and the power supply port is used to connect to a power supply;

[0013] a backup power supply, disposed in the housing;

[0014] An automatic switching circuit is arranged in the shell and electrically connects the power supply port and the backup power supply.

[0015] Preferably, one end of the electrical signal transmission circuit is connected to the disassembly detection MCU, and the other end is connected to the power supply port, the main control unit, the ground wire or the disassembly detection MCU.

[0016] Preferably, the separate level switch is a common normally closed switch, a non-contact magnetic switch or a metal conductor contact switch.

[0017] Preferably, the separate level switch includes a column head and a button switch, one of the column head and the button switch forms the first trigger element, and the other forms the second trigger element. When the upper shell and the lower shell are closed, the column head and the button switch conflict with each other; when the upper shell and the lower shell are separated, the column head and the button switch move away from each other.

[0018] Preferably, the disassembly detection MCU and the main control unit are single-chip microcomputers.

[0019] Preferably, the disassembly detection MCU is a single chip microcomputer that can automatically send an electrical signal when powered on after power failure, and the main control unit can receive the electrical signal and lock the machine.

[0020] Preferably, the device further comprises a weighing sensor disposed in the housing, wherein the weighing sensor is electrically connected to the main control unit.

[0021] Preferably, it further includes a PCB board arranged in the shell, and the disassembly detection MCU and the main control unit are provided on the PCB board.

[0022] The utility model electrically connects the disassembly detection MCU to the main control unit and the electric signal transmission circuit, and sets a separate level switch connected to the shell on the electric signal transmission circuit. When the shell is separated, the disassembly detection MCU can detect the level change on the electric signal transmission circuit, thereby sending a lock signal to the main control unit, causing the main control unit to lock the machine and generate a random string code to be displayed on the display. The string code needs to be decrypted into a secret key through a preset algorithm and then input into the button of the electronic scale to unlock the main control unit. Compared with the traditional sensor module anti-dismantling solution, it is more reliable, energy-saving and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a structural block diagram of the electronic scale anti-tampering device structure provided in an embodiment of the present utility model.

[0025] Reference numerals

[0026] 1-Electrical signal transmission circuit; 2-Separate level switch; 3-Disassembly inspection MCU; 4-Main control unit; 5-Display; 6-Buttons; 7-Power supply port; 8-Backup power supply; 9-Automatic switching circuit; 10-Weighing sensor. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0029] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0031] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] See Figure 1 This embodiment provides an electronic scale anti-tampering machine structure, which includes a shell, which includes an upper shell and a lower shell. The electronic scale anti-tampering machine structure includes an electrical signal transmission circuit 1, a separate level switch 2, a disassembly detection MCU3, a main control unit 4, a display 5, a button 6, a power supply port 7, a backup power supply 8 and an automatic switching circuit 9.

[0033] The electrical signal transmission circuit 1 is arranged in the housing and is used for transmitting level signals.

[0034] The separate level switch 2 is connected to the electric signal transmission circuit 1 and includes a first trigger element provided on the upper housing and a second trigger element provided on the lower housing to connect or disconnect the electric signal transmission circuit 1 when the upper housing and the lower housing are separated.

[0035] The disassembly detection MCU3 is arranged in the housing and is electrically connected to the electrical signal transmission circuit 1 for receiving level signal changes and sending a lock signal.

[0036] The main control unit 4 is arranged in the housing and is electrically connected to the disassembly detection MCU3 for receiving a lock signal and locking the machine.

[0037] The display 5 is provided on the housing and is electrically connected to the main control unit 4 for displaying a random string of codes after the main control unit 4 receives a lock signal.

[0038] The button 6 is provided on the housing and is electrically connected to the main control unit 4 , and is used for inputting an unlocking key converted from a random string by a preset algorithm to unlock the main control unit 4 .

[0039] The power supply port 7 is electrically connected to the disassembly detection MCU 3 or the main control unit 4, and the power supply port 7 is used to connect to a power supply.

[0040] The backup power supply 8 is arranged in the housing.

[0041] The automatic switching circuit 9 is arranged in the housing and electrically connected to the power supply port 7 and the backup power supply 8 .

[0042] The main control unit 4 is the control chip of the electronic scale. When the main control unit 4 is locked, the electronic scale cannot continue weighing; when the main control unit 4 is unlocked, the electronic scale can continue weighing. The disassembly detection MCU is a single-chip microcomputer. Single-chip microcomputers have the advantages of low power consumption, high performance, and low cost. After disassembly, the upper and lower shells are separated, and the separate level switch 2 can change the level in the electrical signal transmission circuit 1. The single-chip microcomputer detects the level signal of the electrical signal transmission circuit 1 to determine whether the electronic scale has been disassembled. Compared with various sensor modules, this is more energy-efficient. In addition, because the single-chip microcomputer has an internal storage function and can record after power failure, a program can be written into the single-chip microcomputer in advance so that the single-chip microcomputer can send a lock signal to the main control unit 4 after power is restored. This is more reliable than the electronic scale motherboard to determine disassembly. After the main control unit 4 is locked, the main control unit 4 can randomly generate a serial code based on the encryption algorithm and display it on the electronic scale display 5, while simultaneously locking the electronic scale's weight window. To unlock the device, log in to the designated app or WeChat mini-program, authenticate your real name, and enter the serial code displayed on the scale. This will retrieve the unlocking key decrypted by the preset algorithm, and then unlock the device by entering the corresponding unlocking code using the scale's buttons. The automatic switching circuit automatically switches to backup power supply 8 when the external power supply is disconnected, ensuring that the disassembly detection MCU 3 can continue to operate and record the disassembly process.

[0043] This embodiment electrically connects the disassembly detection MCU3 to the main control unit 4 and the electrical signal transmission circuit 1, and sets the separate level switch 2 connected to the shell on the electrical signal transmission circuit 1, so that when the shell is separated, the disassembly detection MCU3 can detect the level change on the electrical signal transmission circuit 1, thereby sending a lock signal to the main control unit 4, causing the main control unit 4 to lock the machine and generate a random serial code to be displayed on the display 5. The serial code needs to be decrypted into a secret key through a preset algorithm and then entered into the button of the electronic scale to unlock the main control unit 4. Compared with the traditional sensor module anti-dismantling solution, it is more reliable, energy-saving, and low-cost.

[0044] Furthermore, one end of the electrical signal transmission circuit 1 is connected to the disassembly detection MCU3, and the other end is connected to the power supply port 7, the main control unit 4, the ground wire or the disassembly detection MCU3.

[0045] Among them, when one end of the electrical signal transmission circuit 1 is connected to the disassembly detection MCU3 and the other end is connected to the main control unit 4 or the disassembly detection MCU3, the level on the electrical signal transmission circuit 1 is provided by the disassembly detection MCU3 or the main control unit 4, and the detection interface on the disassembly detection MCU3 can detect the change of the level signal.

[0046] When one end of the electrical signal transmission circuit 1 is connected to the disassembly detection MCU3 and the other end is connected to the negative pole or ground wire of the power supply port 7, the level on the electrical signal transmission circuit 1 is 0, so that detection can be performed with extremely low power consumption and ultra-long standby can be achieved.

[0047] Furthermore, in an embodiment of this embodiment, the separate level switch 2 is a common normally closed switch, a non-contact magnetic switch or a metal conductor contact switch.

[0048] Among them, if the separate level switch 2 is an ordinary normally closed switch, the first trigger element can be a conductive contact, and the second trigger element is two ports on the circuit. When the machine is not disassembled, the shell of the electronic scale is closed so that the conductive contact connects the two ports on the circuit. At this time, the electrical signal transmission circuit 1 is turned on; when the machine is disassembled, the upper and lower shells are separated, the conductive contacts and the two ports on the circuit are separated, and the electrical signal transmission circuit 1 is disconnected, so that the level on the electrical signal transmission circuit 1 changes.

[0049] If the separate level switch 2 is a non-contact magnetic switch, the first trigger element can be a magnet, and the second trigger element can be a reed tube and an electromagnetic element. When the electronic scale is not disassembled, the shell of the electronic scale is closed so that the magnet is close to the reed tube and the electromagnetic element, thereby turning on the electrical signal transmission circuit 1; when the electronic scale is disassembled, the upper and lower shells are separated, the magnet is away from the reed tube and the electromagnetic element, and the electrical signal transmission circuit 1 is disconnected, causing the level on the electrical signal transmission circuit 1 to change.

[0050] Furthermore, in another embodiment of the present embodiment, the separate level switch 2 includes a column head and a button switch, one of the column head and the button switch forms a first trigger element, and the other forms a second trigger element. When the upper shell and the lower shell are closed, the column head and the button switch conflict with each other, and the button is pressed to trigger, thereby turning on or off the electrical signal transmission circuit 1. When the upper shell and the lower shell are separated, the column head and the button switch move away from each other, releasing the button, thereby changing the on-off state of the electrical signal transmission circuit 1.

[0051] Furthermore, the disassembly detection MCU3 is a single-chip microcomputer, which is more power-saving than the combination of traditional control chips and sensor modules. It can consume up to 6 microamperes of power during detection and can work for a long time even with a backup battery; the main control unit 4 is a single-chip microcomputer to reduce power consumption.

[0052] Furthermore, the disassembly detection MCU3 is a single chip microcomputer that can automatically send an electrical signal when powered on after power failure. It can automatically record after power failure and send a lock signal after power is restored. The main control unit 4 can lock the machine after receiving the electrical signal to avoid failure to detect when the machine is disassembled due to power failure.

[0053] Furthermore, the housing further includes a weighing sensor 10 , which is electrically connected to the main control unit 4 . The main control unit 4 can restrict the use of the weighing sensor 10 after the machine is locked.

[0054] Furthermore, it also includes a PCB board arranged in the shell, and the PCB board is provided with a disassembly detection MCU3 and a main control unit 4.

[0055] Working principle:

[0056] The main control unit 4 is the control chip of the electronic scale. When the main control unit 4 is locked, the electronic scale cannot continue weighing; when the main control unit 4 is unlocked, the electronic scale can continue weighing. The disassembly detection MCU is a single-chip microcomputer. Single-chip microcomputers have the advantages of low power consumption, high performance, and low cost. After disassembly, the upper and lower shells are separated. The separate level switch 2 can change the level in the electrical signal transmission circuit 1. The single-chip microcomputer detects the level signal of the electrical signal transmission circuit 1 to determine whether the electronic scale has been disassembled. Compared with various sensor modules, it is more energy-saving. In addition, because the single-chip microcomputer has an internal storage function and can record after power failure, the program can be written into the single-chip microcomputer in advance so that the single-chip microcomputer can send a lock signal to the main control unit 4 after power is turned on again. Compared with the electronic scale motherboard, it is more reliable to judge whether the electronic scale has been disassembled. After the main control unit 4 is locked, the main control unit 4 can randomly generate a serial code based on the encryption algorithm and display it on the electronic scale display 5, while locking the weight window of the electronic scale. When you need to unlock, you can log in to the designated APP or WeChat applet, enter the serial code displayed on the electronic scale after real-name authentication, obtain the unlocking key decrypted by the preset algorithm, and then enter the corresponding unlocking code through the button of the electronic scale to unlock.

[0057] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0058] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. An electronic scale anti-tampering device structure, characterized in that: The electronic scale includes a housing, the housing includes an upper housing and a lower housing, and the electronic scale anti-tampering device structure includes: An electrical signal transmission circuit (1), arranged in the housing, for transmitting a level signal; a separate level switch (2), connected to the electrical signal transmission circuit (1), comprising a first trigger element provided on the upper housing and a second trigger element provided on the lower housing, so as to switch on or off the electrical signal transmission circuit (1) when the upper housing and the lower housing are separated; A disassembly detection MCU (3) is arranged in the housing and electrically connected to the electrical signal transmission circuit (1), and is used to receive a level signal change and send a lock signal; A main control unit (4) is arranged in the housing and electrically connected to the disassembly detection MCU (3), and is used to receive the lock signal and lock the machine; A display (5) is provided on the housing and is electrically connected to the main control unit (4), and is used to display a random string of codes after the main control unit (4) receives a lock signal; A button (6) is provided on the housing and electrically connected to the main control unit (4), and is used for inputting an unlocking key converted from the random string by a preset algorithm to unlock the main control unit (4); A power supply port (7) is electrically connected to the disassembly detection MCU (3) or the main control unit (4), and the power supply port (7) is used to connect to a power supply; A backup power supply (8) is arranged in the housing; An automatic switching circuit (9) is arranged in the housing and electrically connects the power supply port (7) and the backup power supply (8).

2. The electronic scale anti-tampering device structure according to claim 1, characterized in that: One end of the electric signal transmission circuit (1) is connected to the disassembly detection MCU (3), and the other end is connected to the power supply port (7), the main control unit (4), the ground wire or the disassembly detection MCU (3).

3. The electronic scale anti-tampering device structure according to claim 1, characterized in that: The separate level switch (2) is an ordinary normally closed switch, a non-contact magnetic switch or a metal conductor contact switch.

4. The electronic scale anti-tampering device structure according to claim 1, characterized in that: The split level switch (2) comprises a column head and a button switch, one of the column head and the button switch forming the first trigger element, and the other forming the second trigger element, and when the upper shell and the lower shell are closed, the column head and the button switch are in conflict with each other; when the upper shell and the lower shell are separated, the column head and the button switch are separated from each other.

5. The electronic scale anti-tampering device structure according to any one of claims 1 to 4, characterized in that: The disassembly detection MCU (3) and the main control unit (4) are single chip microcomputers.

6. The electronic scale anti-tampering device structure according to claim 5, characterized in that: The disassembly detection MCU (3) is a single chip microcomputer that can automatically send an electrical signal when powered on after power failure, and the main control unit (4) can receive the electrical signal and lock the machine.

7. The electronic scale anti-tampering device structure according to any one of claims 1 to 4, characterized in that: It also includes a weighing sensor (10) arranged in the housing, and the weighing sensor (10) is electrically connected to the main control unit (4).

8. The electronic scale anti-tampering device structure according to any one of claims 1 to 4, characterized in that: It also includes a PCB board arranged in the housing, on which the disassembly detection MCU (3) and the main control unit (4) are provided.

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