Anti-cheating cashier electronic scale

Abstract

The embodiment of the utility model provides an anti-cheating cashier electronic scale. The anti-cheating cashier electronic scale comprises a base, a weighing assembly, an outer frame and a platform, the platform is slidably connected with the outer frame, the weighing assembly is connected with the platform, the base is connected with the outer frame, and the weighing assembly is accommodated in a closed cavity defined by the base, the platform and the outer frame. The weighing assembly is arranged in the closed cavity jointly defined by the base, the platform and the outer frame, cheating personnel can not conveniently install cheating equipment in the weighing assembly, meanwhile, a sealing strip can be pasted to the welding position of the outer frame and the base, the cheating personnel can be prevented from disassembling the outer frame and modifying the weighing assembly, and the cost is reduced. And the anti-cheating effect of the electronic scale is improved in the aspect of the structure of the device.

Description

Technical Field

[0001] This utility model relates to the field of electronic scales, specifically to a tamper-proof electronic cash register scale. Background Technology

[0002] Electronic scales, commonly used measuring devices in commercial transactions, are widely used in supermarkets, convenience stores, farmers' markets, and other retail establishments. The accuracy and reliability of their weighing directly affect the fairness of transactions and the interests of both merchants and consumers. However, electronic scales currently on the market face numerous problems and challenges in practical use. Some unscrupulous merchants, seeking illicit gains, employ various cheating methods to interfere with electronic scales, thereby altering the weighing results. During spot checks at some farmers' markets, law enforcement officers discovered that some scales had concealed remote control devices installed. These unscrupulous merchants can easily change the weighing results by pressing the corresponding button on the remote control when consumers are not paying attention, causing the actual weight of the purchased goods to differ from the weight displayed on the scale, thus resulting in overpayment. These cheating behaviors seriously disrupt the fair trading order of the market, making it difficult for consumers to trust the weighing results of electronic scales during shopping, reducing their shopping experience and trust in merchants. While some electronic scales on the market currently possess certain anti-cheating measures, most are relatively simple and easily cracked, failing to fundamentally eliminate cheating. In conclusion, existing electronic checkout scales are insufficient in their anti-cheating capabilities, urgently requiring a new type of anti-cheating electronic checkout scale to address these issues and meet the market's demand for fair, accurate, and reliable weighing equipment. Utility Model Content

[0003] According to an embodiment of this utility model, a cheat-proof electronic cash register scale is provided to solve the technical problems existing in the background art described above.

[0004] In a first aspect, this utility model provides a tamper-proof electronic cash register scale.

[0005] The anti-cheating electronic scale includes a base, a weighing component, an outer frame, and a platform; the platform is slidably connected to the outer frame, the weighing component is connected to the platform, the base is connected to the outer frame, and the weighing component is housed in a closed cavity defined by the base, the platform, and the outer frame.

[0006] Preferably, the weighing assembly includes a first base plate, a first pressure sensor, a first plate body, a plurality of first connecting plates, a second pressure sensor, a second plate body, and a plurality of second connecting plates;

[0007] The first base plate is attached to the base, the first pressure sensor is connected to the base, the monitoring end of the first pressure sensor is connected to the first plate, the first plate is connected to a plurality of first connecting plates, the plurality of first connecting plates are respectively attached to a plurality of second connecting plates, the plurality of second connecting plates are connected to the second plate, the second plate is connected to the monitoring end of the second pressure sensor, the second pressure sensor is connected to the first base plate, and both the second plate and the first base plate are slidably connected to the outer frame.

[0008] Preferably, the weighing assembly further includes a contact plate, a motor, a cam, a protrusion, a rod, and a first spring;

[0009] The motor is connected to the base, the output end of the motor is connected to the cam, the cam is in contact with the contact plate, the contact plate is connected to the first base plate, the protrusion is connected to the first base plate, the rod passes through the protrusion and is connected to the base, the first spring is sleeved on the rod, and the two ends of the first spring are respectively connected to the top of the rod and the top of the protrusion.

[0010] Preferably, it also includes a slide and a block; the slide is formed on the outer frame, the block is slidably connected to the slide, and the block is connected to the platform.

[0011] Preferably, the platform is connected to an adjustment mechanism via a connecting rod, and the adjustment mechanism is used to place the object to be weighed.

[0012] Preferably, the adjustment mechanism includes a pad, multiple protective rods, and a barrier;

[0013] The pad is connected to the connecting rod, the pad is connected to a plurality of the protective rods, and the plurality of protective rods are slidably connected to the enclosure.

[0014] Preferably, the adjustment mechanism further includes a positioning mechanism, and the adjustment mechanism further includes a limiting plate and a limiting block; the limiting plate and the limiting block are slidably connected, the limiting block is connected to the pad, and the positioning mechanism is disposed on the limiting plate and the limiting block.

[0015] Preferably, the positioning mechanism includes multiple positioning pins, a rotating rod, a protrusion, a second spring, and a shaft.

[0016] The shaft is connected to the limiting block and is rotatably connected to the rotating rod. The second spring is sleeved on the shaft, and both ends of the second spring are respectively connected to the shaft and the rotating rod. The protrusion is located below the rotating rod and can be engaged with the positioning post. Multiple positioning posts are connected to the limiting plate.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0018] 1. The present invention provides an anti-cheating electronic scale for cash registers, in which the weighing component is set in a closed cavity defined by the base, platform and outer frame, making it inconvenient for cheaters to install cheating devices in the weighing component. At the same time, a seal can be affixed at the welding position between the outer frame and the base, which can prevent cheaters from disassembling the outer frame and modifying the weighing component. The anti-cheating effect of the electronic scale is improved in terms of the structure of the device itself.

[0019] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0020] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0021] Figure 1 A three-dimensional connection structure diagram of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0022] Figure 2 An exploded view of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the connection structure of the second plate, the first plate, and the first connecting plate of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the connection structure of the first base plate, protrusion and rod of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0025] Figure 5 A schematic diagram of the connection structure of the second pressure sensor, processor, and second connecting plate of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0026] Figure 6 A schematic diagram of the connection structure of the weighing component of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0027] Figure 7 A schematic diagram of the connection structure of the outer frame, platform, and slide of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0028] Figure 8 A schematic diagram of the connection structure of the positioning mechanism of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0029] Figure 9 An exploded view of the positioning mechanism of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown;

[0030] Figure 10 A schematic diagram of the connection structure of the adjustment mechanism of an anti-cheating electronic cash register scale according to an embodiment of the present invention is shown.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Base, 2-Display end, 3-Weighing component, 301-First base plate, 302-Protrusion, 303-Rod, 304-First spring, 305-Contact plate, 306-Motor, 307-Cam, 308-First pressure sensor, 309-Second pressure sensor, 310-Processor, 311-Second connecting plate, 312-Second plate, 313-First plate, 314-First connecting plate, 4-Positioning mechanism, 401-Positioning column, 402-Rotating rod, 403-Shaft, 404-Second spring, 405-Protrusion, 5-Adjusting mechanism, 501-Pad, 502-Block, 503-Protective rod, 504-Limiting plate, 505-Limiting block, 6-Outer frame, 7-Platform, 8-Slide groove, 9-Block, 10-Connecting rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] like Figures 1 to 10As shown, the anti-cheating electronic cash register scale includes a base 1, a weighing component 3, an outer frame 6, and a platform 7. The platform 7 is slidably connected to the outer frame 6, and the platform 7 can slide inside the outer frame 6. The weighing component 3 is connected to the platform 7. The weighing component 3 is housed within a closed cavity defined by the base 1, the platform 7, and the outer frame 6, and the outer frame 6 is connected to the base 1 by welding.

[0036] In actual use, the item to be weighed is placed on platform 7, which slides on outer frame 6. Weighing component 3 measures the weight of the item on platform 7. Base 1 provides stable support for the entire electronic scale, and a seal can be affixed to the welded position between outer frame 6 and base 1. This device protects the weighing component 3 structurally, reducing the possibility of sales personnel opening outer frame 6 and modifying weighing component 3. During maintenance, the welded position between outer frame 6 and base 1 can be removed for repair.

[0037] In this embodiment, the weighing assembly 3 includes a first base plate 301, a first pressure sensor 308, a first plate 313, multiple first connecting plates 314, a second pressure sensor 309, a second plate 312, and multiple second connecting plates 311. The first base plate 301 is attached to the base 1, the first pressure sensor 308 is connected to the base 1, the monitoring end of the first pressure sensor 308 is connected to the first plate 313, the first plate 313 is connected to the multiple first connecting plates 314, the multiple first connecting plates 314 are respectively attached to the multiple second connecting plates 311, the multiple second connecting plates 311 are connected to the second plate 312, the second plate 312 is connected to the monitoring end of the second pressure sensor 309, the second pressure sensor 309 is connected to the first base plate 301, and both the second plate 312 and the first base plate 301 are slidably connected to the outer frame 6. The weighing assembly 3 also includes a processor 310. A display terminal 2 for displaying the weighing value is also connected to the base 1, and the display terminal 2 is connected to the processor 310.

[0038] In actual use, the device is in its initial state, with multiple second connecting plates 311 attached to the first plate 313, and the first connecting plate 314 higher than the second connecting plates 311, with the first connecting plate 314 in contact with the bottom of the platform 7. After an item is placed on the platform 7, the weight of the item is transmitted to the first pressure sensor 308 through the first connecting plate 314 and the first plate 313. The first pressure sensor 308 is in working condition, weighs the item, and feeds back the weighing data to the processor 310 connected to it.

[0039] The processor 310 operates as follows: When the device is in its initial state, the first pressure sensor 308 is in operation, and the processor 310 controls the second pressure sensor 309 to be off. The first connecting plate 314 contacts the platform 7, and the second connecting plate 311 is attached to the first plate 313. The processor 310 controls the start and stop of the motor 306 through programming to switch between the first pressure sensor 308 and the second pressure sensor 309, and sets it to be timed. When the preset time interval is reached, the processor 310 controls the motor 306 to rotate forward, driving the cam 307 to rotate. The cam 307 drives the contact plate 305 to move upward, thereby pushing the first base plate 301, the second pressure sensor 309, the second plate 312, and the second connecting plate 311 to move upward, so that the second connecting plate 311 contacts the platform 7. The processor 310 controls the second pressure sensor 309 to start and perform weighing, while the first pressure sensor 308 switches to the off state. To enhance anti-cheating capabilities, the processor 310 initiates data verification after the switching between the first pressure sensor 308 and the second pressure sensor 309 is completed. It reads and compares the weighing data from both sensors; if the error exceeds a preset range, an alarm is triggered. Through timed switching and data verification, reliable switching between the first and second pressure sensors 308 is achieved. Since the second pressure sensor 309 remains inactive for a fixed period, sales personnel cannot alter the weighing value using external devices, thus improving the device's anti-cheating capabilities and weighing accuracy.

[0040] Under normal circumstances, the weight data obtained by the first pressure sensor 308 and the second pressure sensor 309 when weighing the same item should be similar, with the error within a very small, acceptable preset range. If a vendor attempts to remotely alter the data of one of the pressure sensors, then a significant difference will appear in the data compared between the first pressure sensor 308 and the second pressure sensor 309. For example, if the processor 310 reads and compares the weighing data from the first pressure sensor 308 and the second pressure sensor 309 within a short period of time, and the error exceeds the preset range, an alarm will be triggered, thus promptly detecting the cheating behavior.

[0041] Simultaneously remotely interfering with both the first pressure sensor 308 and the second pressure sensor 309 to display identical false data would be extremely difficult for a vendor. This is because different pressure sensors differ in their working principles and circuit designs, making it challenging to simultaneously control both sensors to output the same false results. Therefore, using both the first and second pressure sensors adds an extra layer of protection, making it much harder for cheaters to succeed.

[0042] The specific working principle and usage of the processor 310 are well-known to those skilled in the art, and will not be described in detail here.

[0043] In this embodiment, the weighing assembly 3 further includes a contact plate 305, a motor 306, a cam 307, a protrusion 302, a rod 303, and a first spring 304. The motor 306 is connected to the base 1, and its output end is connected to the cam 307. The cam 307 is in contact with the contact plate 305, which is connected to the first base plate 301. The protrusion 302 is connected to the first base plate 301, and the rod 303 is connected to the base 1. The protrusion 302 can slide on the outer wall of the rod 303. The first spring 304 is sleeved on the rod 303, and its two ends are connected to the top of the rod 303 and the top of the protrusion 302, respectively.

[0044] In actual use, when the preset time interval of the processor 310 is reached, the processor 310 controls the motor 306 to rotate forward, and the output end of the motor 306 drives the cam 307 to rotate. During the rotation of the cam 307, the protruding part of the cam 307 gradually contacts the contact plate 305 and pushes the contact plate 305 to move upward. Since the contact plate 305 is connected to the first base plate 301, it drives the first base plate 301 to move upward. When the first base plate 301 moves upward, the protrusion 302 slides upward on the rod 303, while compressing the first spring 304. The upward movement of the first base plate 301 further drives the second pressure sensor 309, the second plate 312, and the multiple second connecting plates 311 connected to the second plate 312 to move upward, so that the second connecting plates 311 are higher than the first connecting plate 314 and contact the platform 7. At this time, the second pressure sensor 309 weighs the item, while the first pressure sensor 308 switches to standby mode. When it is necessary to return to the initial state, the processor controls the motor 306 to reverse, the protruding part of the cam 307 gradually moves away from the contact plate 305, under the elastic restoring force of the first spring 304, the first base plate 301 moves downward, the second connecting plate 311 is once again attached to the first plate 313, the first connecting plate 314 re-contacts the platform 7, and the first pressure sensor 308 resumes its working state.

[0045] In this embodiment, a slide 8 and a block 9 are also included. The slide 8 is formed on the outer frame 6, the block 9 is slidably connected to the slide 8, and the block 9 is connected to the platform 7.

[0046] In actual use, when an item is placed on platform 7 or when it is subjected to external force, platform 7 will undergo a certain displacement. At this time, the block 9 connected to platform 7 will slide within the slide groove 8. The slide groove 8 guides and limits the sliding of block 9, ensuring that platform 7 slides on the outer frame 6 and preventing platform 7 from shaking or shifting, thereby ensuring the stability and accuracy of weighing.

[0047] In this embodiment, the platform 7 is connected to an adjustment mechanism 5 via a connecting rod 10, and the adjustment mechanism 5 is used to place the object to be weighed.

[0048] In actual use, the operator can adjust the placement and state of the item to be weighed through the adjustment mechanism 5 according to actual needs. The item is placed on the adjustment mechanism 5, which is connected to the platform 7 via the connecting rod 10. The weight of the item is transferred to the platform 7 through the connecting rod 10, and then weighed by the weighing component 3.

[0049] In this embodiment, the adjustment mechanism 5 includes a pad 501, a plurality of protective rods 503, and a barrier 502. The pad 501 is connected to the connecting rod 10, the pad 501 is connected to the plurality of protective rods 503, the plurality of protective rods 503 are slidably connected to the barrier 502, and the barrier 502 can be raised and lowered relative to the plurality of protective rods 503.

[0050] In actual use, the item to be weighed is placed on the pad 501, and the pad 501 transfers the weight of the item to the platform 7 via the connecting rod 10. Multiple guardrails 503 provide a certain degree of protection for the weighed item, preventing it from slipping. The barrier 502 can slide on the guardrails 503. The operator can slide the barrier 502 according to the size and shape of the item, adjusting its position so that the barrier 502 can properly surround and protect the item, further enhancing the protective effect and ensuring the stability of items of different sizes during the weighing process.

[0051] In this embodiment, a positioning mechanism 4 is also included, and the adjustment mechanism 5 further includes a limiting plate 504 and a limiting block 505. The limiting plate 504 can move inside the limiting block 505. The limiting block 505 is connected to the pad 501, and the positioning mechanism 4 is disposed on the limiting plate 504 and the limiting block 505.

[0052] In practical use, when the position or state of the adjusting mechanism 5 needs to be adjusted, the limiting plate 504 can slide on the limiting block 505. The positioning mechanism 4 is used to position and fix the sliding position of the limiting plate 504 on the limiting block 505. According to actual needs, the operator can slide the limiting plate 504 to a suitable position and then fix the limiting plate 504 through the positioning mechanism 4 to meet the weighing requirements of items of different sizes.

[0053] In this embodiment, the positioning mechanism 4 includes multiple positioning posts 401, a rotating rod 402, a protrusion 405, a second spring 404, and a shaft 403. The shaft 403 is connected to the limiting block 505, and the shaft 403 is rotatably connected to the rotating rod 402 via bearings. The second spring 404 is sleeved on the shaft 403, and its two ends are respectively connected to the shaft 403 and the rotating rod 402. The protrusion 405 is located below the rotating rod 402 and can be engaged with a corresponding positioning post 401. The multiple positioning posts 401 are equidistantly distributed on the limiting plate 504.

[0054] In practical use, when the position of the limiting plate 504 needs to be adjusted, the operator manually rotates the rotating rod 402 to disengage the protrusion 405 from the currently engaged positioning post 401, allowing the limiting plate 504 to slide freely. During the rotation of the rotating rod 402, the second spring 404 undergoes elastic deformation and stores elastic potential energy. When the limiting plate 504 slides to the appropriate position, the rotating rod 402 is released. Under the elastic restoring force of the second spring 404, the rotating rod 402 rotates back, causing the protrusion 405 to engage with the corresponding positioning post 401, thereby fixing the limiting plate 504 in that position and achieving the positioning and fixation of the adjusting mechanism 5.

[0055] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A cheat-proof electronic cash register scale, characterized in that, It includes a base (1), a weighing component (3), an outer frame (6), and a platform (7); the platform (7) is slidably connected to the outer frame (6), the weighing component (3) is connected to the platform (7), the base (1) is connected to the outer frame (6), and the weighing component (3) is housed in a closed cavity defined by the base (1), the platform (7), and the outer frame (6).

2. The anti-cheating electronic cash register scale according to claim 1, characterized in that, The weighing assembly (3) includes a first base plate (301), a first pressure sensor (308), a first plate (313), a plurality of first connecting plates (314), a second pressure sensor (309), a second plate (312), and a plurality of second connecting plates (311). The first base plate (301) is attached to the base (1), the first pressure sensor (308) is connected to the base (1), the monitoring end of the first pressure sensor (308) is connected to the first plate (313), the first plate (313) is connected to a plurality of first connecting plates (314), the plurality of first connecting plates (314) are respectively attached to a plurality of second connecting plates (311), the plurality of second connecting plates (311) are connected to the second plate (312), the second plate (312) is connected to the monitoring end of the second pressure sensor (309), the second pressure sensor (309) is connected to the first base plate (301), and the second plate (312) and the first base plate (301) are both slidably connected to the outer frame (6).

3. The anti-cheating electronic cash register scale according to claim 2, characterized in that, The weighing assembly (3) also includes a contact plate (305), a motor (306), a cam (307), a protrusion (302), a rod (303), and a first spring (304). The motor (306) is connected to the base (1), the output end of the motor (306) is connected to the cam (307), the cam (307) is in contact with the contact plate (305), the contact plate (305) is connected to the first base plate (301), the protrusion (302) is connected to the first base plate (301), the rod (303) passes through the protrusion (302) and is connected to the base (1), the first spring (304) is sleeved on the rod (303), and the two ends of the first spring (304) are respectively connected to the top of the rod (303) and the top of the protrusion (302).

4. The anti-cheating electronic cash register scale according to claim 1, characterized in that, It also includes a slide (8) and a block (9); the slide (8) is formed on the outer frame (6), the block (9) is slidably connected to the slide (8), and the block (9) is connected to the platform (7).

5. The anti-cheating electronic cash register scale according to claim 1, characterized in that, The platform (7) is connected to an adjustment mechanism (5) via a connecting rod (10), and the adjustment mechanism (5) is used to place the object to be weighed.

6. The anti-cheating electronic cash register scale according to claim 5, characterized in that, The adjustment mechanism (5) includes a pad (501), multiple protective bars (503), and a barrier (502); The pad (501) is connected to the connecting rod (10), the pad (501) is connected to a plurality of the protective rods (503), and the plurality of the protective rods (503) are slidably connected to the enclosure (502).

7. The anti-cheating electronic cash register scale according to claim 6, characterized in that, It also includes a positioning mechanism (4), and the adjustment mechanism (5) further includes a limiting plate (504) and a limiting block (505); the limiting plate (504) and the limiting block (505) are slidably connected, the limiting block (505) is connected to the pad (501), and the positioning mechanism (4) is disposed on the limiting plate (504) and the limiting block (505).

8. The anti-cheating electronic cash register scale according to claim 7, characterized in that, The positioning mechanism (4) includes multiple positioning pins (401), a rotating rod (402), a protrusion (405), a second spring (404), and a shaft (403). The shaft (403) is connected to the limiting block (505), and the shaft (403) is rotatably connected to the rotating rod (402). The second spring (404) is sleeved on the shaft (403), and the two ends of the second spring (404) are respectively connected to the shaft (403) and the rotating rod (402). The protrusion (405) is located below the rotating rod (402), and the protrusion (405) can be snapped onto the positioning post (401). Multiple positioning posts (401) are connected to the limiting plate (504).

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