Anti-disassembly system of weighing apparatus and weighing apparatus structure

Abstract

The invention provides an anti-disassembly system of a weighing apparatus, which comprises an anti-disassembly module and a control module, and is characterized in that the anti-disassembly module is electrically connected with the control module; the anti-disassembly module comprises an anti-disassembly circuit board and an anti-disassembly switch which is arranged on the anti-disassembly circuit board and electrically connected with the anti-disassembly circuit board, and the anti-disassembly switch is in a normally closed state; when the open circuit of the anti-disassembly switch is identified, a chip on the control module identifies and locks the control module; and after the control module is locked, the log or the abnormal event is uploaded to the cloud server. According to the anti-disassembly system, the anti-disassembly module is arranged, when the anti-disassembly switch of the anti-disassembly module is open-circuited and identified, the control module can be locked, logs or abnormal events are uploaded to the cloud server, the problem caused by privately disassembling by other people can be avoided, and the invention further provides a weighing apparatus structure.

Description

Technical Field

[0001] The present invention relates to the technical field of weighing instruments, in particular to an anti-tampering system for weighing instruments and a weighing instrument structure. Background Art

[0002] A weighing instrument is an instrument that measures the mass of an object using Hooke's law or the principle of lever balance of force. For example, an electronic scale or a price scale, etc. Most of the current electronic scales or price scales on the market are not anti-tamper, so there may be the following disadvantages: First, if it is privately disassembled by a third party, the manufacturer may not be able to trace the responsibility for tampering and bear legal risks; Second, when the scale does not have an anti-tamper design, the internal circuit or sensor may be maliciously disassembled and modified, resulting in the weighing result being manipulated for commercial fraud or evading supervision.

[0003] In view of this, the inventor of the present invention has specifically designed an anti-tampering system for weighing instruments and a weighing instrument structure, and this case is thus generated. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention proposes an anti-tampering system for a weighing instrument. By setting an anti-tampering module, when the anti-tampering switch of the anti-tampering module is open and recognized, the control module can be locked, and logs or abnormal events can be sent to the cloud server, and the weighing instrument cannot be used, overcoming the problems brought by others' unauthorized disassembly or malicious modification.

[0005] The present invention also proposes a weighing instrument structure.

[0006] According to an anti-tampering system for a weighing instrument provided by the present invention, it includes an anti-tampering module and a control module, and the anti-tampering module is electrically connected to the control module; The anti-tampering module includes an anti-tampering circuit board and an anti-tampering switch arranged on the anti-tampering circuit board and electrically connected to the anti-tampering circuit board, and the anti-tampering switch is in a normally closed state; When it is recognized that the anti-tampering switch is open, the chip on the control module recognizes and locks the control module; after the control module is locked, logs or abnormal events are sent to the cloud server.

[0007] The anti-tampering system of the present invention, by setting an anti-tampering module, when the anti-tampering switch of the anti-tampering module is open and recognized, can lock the control module and send logs or abnormal events to the cloud server, and can avoid the problems brought by others' unauthorized disassembly.

[0008] In some embodiments of the present invention, the anti-tampering system further includes a weighing sensor, a printing module, and a communication module, and the weighing sensor, the printing module, and the communication module are electrically connected to the control module. Among them, logs or abnormal events are sent to the cloud server through the through-hole module.

[0009] According to a weighing instrument structure provided by the present invention, an anti-disassembly system of the weighing instrument is adopted. The weighing instrument structure includes: A main body upper cover, on which a first installation groove is provided. The inner part of the outer shell is hollow, and an opening is provided at the bottom. A bottom plate, which is arranged at the opening under the main body upper cover. A main body front cover, which is arranged at the opening of the first installation groove. The control module is arranged inside the main body front cover and located in the first installation groove; the anti-disassembly module is arranged in the first installation groove; a first step is provided on the bottom plate to abut against the anti-disassembly switch, and a second step is provided on the inner side of the main body front cover to abut against the anti-disassembly circuit board.

[0010] In some embodiments of the present invention, the control module includes a first circuit board, a display screen and a plurality of operation keys arranged on the first circuit board. The display screen and the plurality of operation keys are both electrically connected to the first circuit board.

[0011] In some embodiments of the present invention, a protective layer also covers the surface of the main body front cover.

[0012] In some embodiments of the present invention, a placement groove is provided on the main body upper cover and at the position of the first installation groove, and the protective layer is embedded in the placement groove.

[0013] In some embodiments of the present invention, the anti-disassembly module further includes a battery, the battery is electrically connected to the anti-disassembly circuit board, and the anti-disassembly switch is electrically connected to the anti-disassembly circuit board.

[0014] In some embodiments of the present invention, a receiving groove is further provided on the upper end surface of the main body upper cover, the battery is arranged in the receiving groove, a first channel is provided between the receiving groove and the first installation, and a waterproof head is provided at the first channel. A wire passes through the waterproof head, and both ends are respectively electrically connected to the anti-disassembly circuit board and the battery. A sealing cover is provided at the opening above the receiving groove to achieve a waterproof effect.

[0015] In some embodiments of the present invention, a second channel for the anti-disassembly switch to pass through is provided at the bottom of the first installation groove, and the anti-disassembly switch faces the bottom plate.

[0016] In some embodiments of the present invention, a sealing gasket is further provided at the bottom of the first installation groove corresponding to the second channel. The sealing gasket includes a horizontal part and a convex part arranged on the horizontal part. The inside of the convex part is hollow for covering the anti-disassembly switch.

[0017] In some embodiments of the present invention, the control module is locked to the front cover of the main body by a plurality of first screws, and the front cover of the main body is locked to the upper cover of the main body by a plurality of second screws.

[0018] In some embodiments of the present invention, an avoidance position for avoiding the display and the operation keys is further provided on the front cover of the main body.

[0019] In some embodiments of the present invention, the anti-disassembly circuit board is locked to the bottom of the first installation groove by a third screw. One of the third screws directly passes through the anti-disassembly circuit board and is locked to the upper cover of the main body, and the other third screw passes through the first step and the anti-disassembly circuit board and is locked to the upper cover of the main body; a cylindrical portion is provided on the upper cover of the main body, and an internal threaded hole is provided on the cylindrical portion for threaded connection with the third screw. Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0021] Wherein: Figure 1 is the schematic diagram of the anti-disassembly system of the present invention; Figure 2 is the structural schematic diagram of the weighing instrument of the present invention; Figure 3 is the exploded schematic diagram of the weighing instrument of the present invention; Figure 4 is the sectional schematic diagram of the weighing instrument of the present invention; Figure 5 is the partial structural schematic diagram of the upper cover of the main body of the present invention; Figure 6 is the structural schematic diagram of the upper cover of the main body of the present invention; Figure 7 is the present invention Figure 5 partial enlarged view; Figure 8 is the structural schematic diagram of the front cover of the main body of the present invention; Figure 9 is the structural schematic diagram of the control module of the present invention; Figure 10 is the structural schematic diagram of the anti-disassembly module of the present invention; Figure 11 is the structural schematic diagram of the gasket of the present invention.

[0022] Reference numeral description: 10. Main body upper cover; 11. First installation groove; 12. Placing groove; 13. Accommodating groove; 14. First channel; 15. Second channel; 16. Cylindrical part; 20. Bottom plate; 21. First step; 30. Main body front cover; 31. Second step; 40. Control module; 41. First circuit board; 42. Display screen; 43. Operation button; 50. Anti-disassembly module; 51. Anti-disassembly circuit board; 52. Anti-disassembly switch; 60. Protective layer; 70. Sealing gasket; 71. Horizontal part; 72. Protruding part; 80. Sealing cover. Detailed implementation manner

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Please refer to Figure 1 , which is an anti-disassembly system for a weighing instrument provided by the present invention, includes an anti-disassembly module 50 and a control module 40. The anti-disassembly module 50 is electrically connected to the control module 40; the anti-disassembly module 50 includes an anti-disassembly circuit board 51 and an anti-disassembly switch 52 disposed on the anti-disassembly circuit board 51 and electrically connected to the anti-disassembly circuit board 51. The anti-disassembly switch 52 is in a normally closed state; when it is recognized that the anti-disassembly switch 52 is open, the chip on the control module 40 recognizes and locks the control module 40; after the control module 40 is locked, the log or abnormal event is sent to the cloud server. The anti-disassembly system of the present invention can lock the control module 40 and send the log or abnormal event to the cloud server when the anti-disassembly switch 52 of the anti-disassembly module 50 is recognized as open, which can avoid the problems caused by unauthorized disassembly by others.

[0025] The anti-disassembly system further includes a weighing sensor, a printing module, and a communication module. The weighing sensor, the printing module, and the communication module are electrically connected to the control module 40. Among them, the log or abnormal event is sent to the cloud server through the through-hole module. The communication module can use an IoT card / WIFI, etc. for sending and receiving information. The connection and installation methods of the weighing sensor, the printing module, and the communication module are prior arts and will not be described in detail.

[0026] Please refer to Figures 2 to 11, the present invention also provides a weighing instrument structure, which adopts an anti-disassembly system of the weighing instrument. The weighing instrument structure includes: a main body upper cover 10, a bottom plate 20, a main body front cover 30. A first installation groove 11 is provided on the main body upper cover 10. The inner part of the outer shell is hollow and an opening is provided at the bottom; the bottom plate 20 is arranged at the opening under the main body upper cover 10; the main body front cover 30 is arranged at the opening of the first installation groove 11; the control module 40 is arranged inside the main body front cover 30 and located in the first installation groove 11; the anti-disassembly module 50 is arranged in the first installation groove 11; a first step 21 is provided on the bottom plate 20 to abut against the anti-disassembly switch 52, and a second step 31 is provided on the inner side of the main body front cover 30 to abut against the anti-disassembly circuit board 51. Therefore, after the anti-disassembly module 50 is installed in place, the anti-disassembly switch 52 is in an open state. When someone removes it from the bottom plate 20 or the main body front cover 30, the anti-disassembly switch 52 resets, and the anti-disassembly circuit board 51 recognizes and locks the circuit board, mainly by locking the circuit board to achieve the anti-disassembly effect.

[0027] For details, please refer to Figure 3 , Figure 9 , the control module 40 includes a first circuit board 41, a display screen 42 and a number of operation buttons 43 arranged on the first circuit board 41. The display screen 42, the number of operation buttons 43 and the anti-disassembly circuit board 51 are all electrically connected to the first circuit board 41. A protective layer 60 is also covered on the surface of the main body front cover 30 to protect the control module 40 through the protective layer 60 and can also play a waterproof effect. Specifically, a placement groove 12 is provided on the main body upper cover 10 and at the position of the first installation groove 11, and the protective layer 60 is embedded in the placement groove 12.

[0028] To prevent the weighing instrument from being disassembled when power is off, the anti-disassembly module 50 also includes a battery. The battery is electrically connected to the anti-disassembly circuit board 51, and the anti-disassembly switch 52 is electrically connected to the anti-disassembly circuit board 51. The battery supplies power to each component, making the anti-disassembly effect more effective; specifically, a receiving groove 13 is also provided on the upper end surface of the main body upper cover 10, and the battery is arranged in the receiving groove 13 to facilitate battery replacement; a first channel 14 is provided between the receiving groove 13 and the first installation, and a waterproof head is provided at the first channel 14. A wire passes through the waterproof head and is electrically connected to the anti-disassembly circuit board 51 and the battery at both ends respectively. A sealing cover 80 is provided at the opening above the receiving groove 13 to achieve a waterproof effect.

[0029] For details, please refer to Figure 3 , Figures 5 - 7, a second channel 15 for the anti-tamper switch 52 to pass through is provided at the bottom of the first installation groove 11, and the anti-tamper switch 52 is arranged facing the bottom plate 20. An IoT card / WIFI, etc. can be used on the communication module for sending and receiving information. The anti-tamper switch 52 can be a micro switch, an optocoupler, etc. When the user disassembles the main body upper cover 10, the travel switch is released, and the chip on the anti-tamper circuit board 51 detects the open circuit of the switch, locks the first circuit board 41, and sends the log or abnormal event to the cloud server through the transmitting module. The server receives the abnormality and records it, and the cloud server can control the locking and unlocking of the first circuit board 41; preferably, it is best to use a travel switch for the switch, with a large travel to prevent the deformation of the scale bottom caused by the instantaneous extrusion of the scale plate when a heavy object is placed on the scale plate, thereby affecting the release of the switch; the battery of the present invention can use a button battery, and the combination of the button battery and the chip TAMPER function can ensure that even in the power-off state, the chip TAMPER function can still operate with low power consumption; or use a lithium-ion battery for power supply, combined with a microcontroller equipped with low-power interrupt management. When the bottom plate 20 or the main body front cover 30 is abnormally disassembled, the switch circuit will generate a trigger signal. After the microcontroller detects the level jump through the GPIO interface in real time, it immediately triggers the interrupt service program, executes to record the abnormal event in the non-volatile memory, and locks the first circuit board 41. The entire anti-tamper module 50 adopts a dynamic power consumption management strategy, maintaining a μA-level sleep current in the standby state, ensuring long-term battery life, and at the same time ensuring the real-time responsiveness of the safety protection function.

[0030] The control module 40 is locked to the main body front cover 30 by a plurality of first screws, and the main body front cover 30 is locked to the main body upper cover 10 by a plurality of second screws. An avoidance position for avoiding the display and the operation button 43 is also provided on the main body front cover 30.

[0031] For details, please refer to Figure 3 , Figure 11 , a gasket 70 is also provided at the bottom of the first installation groove 11 corresponding to the second channel 15. The gasket 70 includes a horizontal portion 71 and a convex portion 72 provided on the horizontal portion 71. The convex portion 72 is hollow inside for wrapping the anti-tamper switch 52; the anti-tamper circuit board 51 is locked to the bottom inside of the first installation groove 11 by a third screw. One of the third screws directly passes through the anti-tamper circuit board 51 and is locked to the main body upper cover 10, and the other third screw passes through the first step 21 and the anti-tamper circuit board 51 and is locked to the main body upper cover 10. Specifically, a cylindrical portion 16 is provided on the main body upper cover 10, and an internal threaded hole is provided on the cylindrical portion 16 for threaded connection with the third screw.

[0032] In this embodiment, multiple anti-tamper switches 52 can be provided. For example, two anti-tamper switches are provided in this embodiment to achieve multi-channel anti-tampering. Electrically, multiple anti-tamper switches 52 are connected in series to implement the logic of "AND" for the keys. Structurally, studs or screws or the first step 21 are used to press against all the switches to ensure that the switches are closed. The microcontroller on the first circuit board 41 detects that the level always remains low. When one of the anti-tamper switches 52 is open, the connected keys are also disconnected, and the microcontroller detects the change in the level and triggers locking (the switches connected in series can be connected in series with each other using terminal connectors, which enables the electronic scale to be modularized and each module can also be locked).

[0033] In this embodiment, the bottom plate 20 is locked using lead seal screws and special-shaped screws, and special tools are required for disassembly, increasing the difficulty of illegal disassembly. Moreover, the first circuit board 41 is potted with epoxy resin and cannot be restored after being damaged, further improving the anti-tampering effect.

[0034] In summary, the anti-tampering system of the present invention can lock the control module and upload logs or abnormal events to the cloud server when the anti-tamper switch of the anti-tampering module is open and recognized, avoiding problems caused by unauthorized disassembly by others. Specifically, it has the following advantages: First, using this solution can significantly improve the safety, reliability, and compliance of the electronic scale; Second, after the anti-tampering module is triggered, the cloud records the log, which can prove whether the device has been illegally disassembled and modified, avoiding unnecessary liability for the manufacturer; Third, double protection of the locking structure and the anti-tampering module. On the locking structure, anti-tampering screws, lead seal screws, etc. lock the outer shell, directly blocking access; when the circuit detects an abnormality, it triggers data erasure and uploads the log.

[0035] Fourth, self-healing anti-tampering. After triggering the protection, authorized personnel are allowed to remotely restore it, reducing the cost of returning to the factory.

[0036] The present invention has been described exemplarily above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An anti-tampering system for a weighing instrument, characterized in that It includes an anti-tampering module and a control module, and the anti-tampering module is electrically connected to the control module; The anti-tampering module includes an anti-tampering circuit board and an anti-tampering switch disposed on the anti-tampering circuit board and electrically connected to the anti-tampering circuit board. The anti-tampering switch is in a normally closed state; When it is recognized that the anti-tampering switch is open, the chip on the control module recognizes and locks the control module; after the control module is locked, logs or abnormal events are sent to the cloud server.

2. The anti-disassembly system of a weighing instrument according to claim 1, the anti-disassembly system further includes a weighing sensor, a printing module, and a communication module, the weighing sensor, the printing module, and the communication module are electrically connected to the control module, wherein, The logs or abnormal events are sent to the cloud server through the through-hole module.

3. A weighing instrument structure adopts the anti-disassembly system of a weighing instrument described in claim 1 or 2, and is characterized in that The structure of this weighing scale includes: A main body upper cover, on which a first installation groove is provided. The inner part of the outer shell is hollow and an opening is provided at the bottom; A bottom plate, which is disposed at the opening below the main body upper cover; A main body front cover, which is disposed at the opening of the first installation groove; The control module is disposed inside the main body front cover and within the first installation groove; the anti-tampering module is disposed within the first installation groove; a first step is provided on the bottom plate for abutting against the anti-tampering switch, and a second step is provided on the inner side of the main body front cover for abutting against the anti-tampering circuit board.

4. An instrument structure according to claim 3, characterized in that, The control module includes a first circuit board, a display screen, and several operation buttons disposed on the first circuit board. The display screen and the several operation buttons are both electrically connected to the first circuit board.

5. The anti-disassembly system of a weighing instrument according to claim 3, characterized in that, The anti-tampering module further includes a battery, which is electrically connected to the anti-tampering circuit board, and the anti-tampering switch is electrically connected to the anti-tampering circuit board.

6. The anti-disassembly system of a weighing instrument according to claim 3, characterized in that, A receiving groove is further provided on the upper end surface of the main body upper cover, and the battery is disposed within the receiving groove. A first channel is provided between the receiving groove and the first installation part, and a waterproof head is provided at the first channel.

7. The anti-disassembly system of a weighing instrument according to claim 3, wherein, A second channel for the anti-tampering switch to pass through is provided at the bottom of the first installation groove, and the anti-tampering switch faces the bottom plate.

8. The weighing instrument structure according to claim 6, characterized in that, A sealing gasket is further provided at the bottom of the first installation groove corresponding to the second channel. The sealing gasket includes a horizontal part and a protruding part provided on the horizontal part. The inside of the protruding part is hollow for wrapping the anti-tampering switch.

9. The weighing device structure according to claim 3, wherein The control module is locked to the main body front cover by several first screws, and the main body front cover is locked to the main body upper cover by several second screws.

10. The weighing instrument structure according to claim 3, characterized in that, The anti-tampering circuit board is locked to the bottom of the first installation groove by a third screw. One of the third screws directly passes through the anti-tampering circuit board and then is locked to the main body upper cover, and the other third screw passes through the first step and the anti-tampering circuit board and then is locked to the main body upper cover.

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