An electronic weighing scale circuit monitoring device

Abstract

The present invention relates to the technical field of circuit monitoring. Specifically, it relates to a circuit monitoring device for an electronic weighing scale, which includes a fixed frame, a fixed top cover fixed on the top surface of the fixed frame, wiring devices arranged at the front and rear ends of the fixed frame, a transmission device arranged at the inner corner positions of the fixed frame, and a monitoring component for monitoring the circuit in real time. For this circuit monitoring device of the electronic weighing scale, when the fixed top cover is buckled on the top surface of the fixed frame, it drives the position of the pressing tooth plate, and through the rotating cylinder teeth, the whole wiring device is driven to move towards the position of the monitoring component. The automatic wiring mechanism saves the time and effort of manual wiring. At the same time, in cooperation with the extrusion part, it ensures the stability of the connection between the gravity sensor and the line joint, effectively preventing the data line from being worn due to external force pulling.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit monitoring, and more specifically, to a circuit monitoring device for an electronic weight checker. Background Art

[0002] The circuit monitoring device of an electronic weight checker is an important part of it. It is designed based on the working principle of resistance strain gauges. When an object is placed on the weighing platform of the electronic weighing scale, the weighing platform will undergo a slight deformation, and this deformation is converted into a voltage signal through a full-bridge circuit. The circuit monitoring device ensures the stability and accuracy of the signal, and at the same time can reduce the influence of external interference on the weighing result, thus realizing the high precision and stability of the electronic weight checker.

[0003] The patent with the application number CN202123185489.9 discloses a monitoring device for a transformer circuit, including a monitoring box body. An installation frame is fixedly installed on the back of the monitoring box body, and a port is fixedly installed on the top of the monitoring box body. By setting a multifunctional detection mechanism, the monitoring box body is installed in the transformer through the installation frame to monitor the circuit. The partial discharge signal monitor can measure and monitor the electric field of the transformer. When a short circuit or open circuit occurs inside the monitoring box body, the alarm device can send a signal to prompt the staff to repair. This solves the problems that the functional structure of the existing monitoring device is simple, the content that can be monitored is few, and some problems cannot be discovered in time.

[0004] During the connection process between the existing circuit monitoring device and the gravity sensor of the electronic weight checker, it is often necessary to separate multiple wires inside the sensor line and only connect the copper wires to the wiring components. This operation not only easily causes the data line to be worn due to external pulling when the device moves, shortening the service life, but also greatly increases the manual wiring time. In addition, most of the monitoring components inside the circuit monitoring device are fixed with screws, but the device is small in size and the screws are correspondingly thin, which brings great difficulty to subsequent maintenance. It is difficult for workers to quickly and conveniently remove the monitoring components for maintenance.

[0005] In view of this, we propose a circuit monitoring device for an electronic weight checker. Summary of the Invention

[0006] The purpose of the present invention is to provide a circuit monitoring device for an electronic weight checker to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A circuit monitoring device for an electronic weight checker, including a fixed frame, a fixed top cover fixed on the top surface of the fixed frame, a wiring device arranged at the front and rear ends of the fixed frame, a transmission device arranged at the inner corner positions of the fixed frame, and a monitoring component used to monitor the circuit in real time;

[0009] The fixed frame includes an outer casing and a number of guiding blocks symmetrically arranged front and back;

[0010] The wiring device includes a moving part, a number of circuit connectors arranged inside the moving part, and a pressing part arranged below the circuit connectors;

[0011] The moving part includes a moving slider, fixed toothed plates arranged on the outer side walls at the left and right ends of the moving slider, and a number of regularly distributed pressing teeth;

[0012] The pressing part includes a sliding plate and pressing teeth that move as the sliding plate moves;

[0013] The transmission device includes a downward pressing toothed plate, a rotating cylinder tooth that rotates as the downward pressing toothed plate moves, a scroll spring arranged inside the rotating cylinder tooth, and a limiting part that cooperates with the rotation of the rotating cylinder tooth;

[0014] The limiting part includes a lead screw that rotates as the rotating cylinder tooth rotates and a limiting insertion block that moves as the lead screw rotates;

[0015] The monitoring component includes a fixed box body, a monitoring module arranged inside the fixed box body, a number of docking sockets arranged at the front and back ends of the fixed box body and used to cooperate with the circuit connectors, and convex frame blocks arranged at the corners of the outer side walls at the front and back ends of the fixed box body.

[0016] In the technical solution of the present invention, four limiting bumps distributed in a matrix are welded and fixed on the inner bottom surface of the outer casing, and the area surrounded by the four limiting bumps is adapted to the external dimensions of the monitoring component. Frame body chutes with a T-shaped transverse cross-section are opened at the corner positions on the top surface of the outer casing.

[0017] In the technical solution of the present invention, the guiding blocks are welded and fixed on the inner bottom surface of the outer casing, the fixed top cover is snap-fixed on the top surface of the outer casing, and a flap that can be opened is provided at the center position of the top surface of the fixed top cover.

[0018] In the technical solution of the present invention, the moving slider is slidably connected to the inner bottom surface of the outer casing. Four block chutes that penetrate front and back and have a T-shaped longitudinal cross-section are opened inside the moving slider, and the fixed toothed plates are snap-fixed on the outer side walls of the moving slider.

[0019] In the technical solution of the present invention, the pressing teeth are welded and fixed on the outer side walls of the moving slider, and a circuit connector for connecting to the data line of the gravity sensor inside the electronic weighing scale is snap-fixed above the block chutes inside the moving slider.

[0020] In the technical solution of the present invention, the sliding plate is slidably connected to the inside of the block chute. A limiting telescopic rod is fixedly clamped below the pressing teeth on the top surface of the sliding plate. A pressure spring is sleeved outside the limiting telescopic rod. The bottom surface of the extrusion teeth is fixedly clamped to the top end of the limiting telescopic rod. The elastic force provided by the pressure spring is used to push the extrusion teeth upward.

[0021] In the technical solution of the present invention, the downward pressing tooth plate is slidably connected to the inside of the frame chute. The rotating cylinder teeth are rotatably connected to the inner side wall of the outer sleeve frame. The rotating cylinder teeth are respectively meshed with the fixed tooth plate and the downward pressing tooth plate. A fixed rod is fixedly welded at the central position of the scroll spring. The outer end of the scroll spring is fixedly clamped to the inner barrel wall of the rotating cylinder teeth. The end of the fixed rod is fixedly clamped to the inner side wall of the outer sleeve frame.

[0022] In the technical solution of the present invention, the limiting part further includes a bent plate for providing a rotation interval for the lead screw, a fixed tube arranged on the inner side wall of the bent plate, and a rod end gear fixedly clamped at the end position of the lead screw. The transverse section of the bent plate is L-shaped. The fixed tube is fixedly clamped to the outer side wall of the bent plate.

[0023] In the technical solution of the present invention, the lead screw is rotatably connected to the outer side wall of the bent plate. The inner end of the lead screw is rotatably connected to the inner tube wall of the fixed tube. The rod end gear is meshed with the rotating cylinder teeth. The outer circular plate of the limiting insertion block is threadedly connected to the lead screw and slidably connected to the inside of the fixed tube.

[0024] In the technical solution of the present invention, the fixed box body is fixedly clamped to the inner bottom surface of the outer sleeve frame. The monitoring module is fixedly connected to the inside of the fixed box body by screws. The docking socket and the outer convex frame block are both fixedly connected to the fixed box body by screws. The inner frame of the outer convex frame block is grooved to match the size of the square block at the end of the limiting insertion block.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. For this electronic weighing scale circuit monitoring device, when the fixed top cover is buckled on the top surface of the fixed frame, it drives the downward pressing tooth plate to move, and through the rotating cylinder teeth, the whole wiring device moves towards the position of the monitoring component. The automatic wiring mechanism saves the time and energy of manual wiring. At the same time, in cooperation with the extrusion part, it ensures the stability of the connection between the gravity sensor and the circuit connector, effectively preventing the data cable from being worn due to external force pulling.

[0027] 2. For the circuit monitoring device of the electronic weighing scale, when the rotating cylinder teeth inside the transmission device rotate, the lead screw in the limiting part rotates simultaneously. In cooperation with the limiting insertion block, it ensures the stability of the monitoring component inside the outer frame body. Through the quick assembly and disassembly structure, it facilitates the subsequent overhaul and maintenance of the overall monitoring component. Description of the Drawings

[0028] Figure 1 Schematic diagram of the overall structure of the present invention;

[0029] Figure 2 Schematic diagram of one of the partial structures of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the fixed frame in the present invention;

[0031] Figure 4 Schematic diagram of the structure of the fixed top cover in the present invention;

[0032] Figure 5 Schematic diagram of another partial structure of the present invention;

[0033] Figure 6 Schematic diagram of the structure of the wiring device in the present invention;

[0034] Figure 7 Schematic diagram of the structure of the moving part in the present invention;

[0035] Figure 8 Schematic diagram of the structure of the extrusion part in the present invention;

[0036] Figure 9 Schematic diagram of the structure of the line joint in the present invention;

[0037] Figure 10 Schematic diagram of the structure of the transmission device in the present invention;

[0038] Figure 11 Schematic diagram of the partial structure cross-section of the transmission device in the present invention;

[0039] Figure 12 Schematic diagram of the structure cross-section of the limiting part in the present invention;

[0040] Figure 13 Schematic diagram of the structure of the monitoring component in the present invention;

[0041] Description of the reference numerals:

[0042] 100, fixed frame; 110, outer frame body; 111, frame body chute; 120, limiting convex block; 130, guiding block;

[0043] 200, fixed top cover;

[0044] 300, Wiring device; 310, Moving part; 311, Moving slider; 3110, Block chute; 312, Fixed toothed plate; 313, Pressing tooth; 320, Extrusion part; 321, Sliding plate; 322, Limit telescopic rod; 323, Pressure spring; 324, Extrusion tooth; 330, Line connector;

[0045] 400, Transmission device; 410, Lower pressing toothed plate; 420, Rotating cylinder tooth; 430, Volute spring; 440, Fixed rod; 450, Limiting part; 451, Bent plate; 452, Fixed pipe; 453, Lead screw; 454, Rod end gear; 455, Limit insertion block;

[0046] 500, Monitoring component; 510, Fixed box body; 520, Monitoring module; 530, Docking socket; 540, Outer convex frame block. Detailed implementation manners

[0047] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figures 1 - 13 As shown, this embodiment provides a technical solution:

[0049] An electronic weighing scale circuit monitoring device includes a fixed frame 100, a fixed top cover 200 fixed on the top surface of the fixed frame 100, a wiring device 300 arranged at the front and rear ends of the fixed frame 100, a transmission device 400 arranged at the inner corner positions of the fixed frame 100, and a monitoring component 500 for monitoring the circuit in real time;

[0050] In this embodiment, as Figures 3 - 4 , the fixed frame 100 includes an outer sleeve frame body 110 and a plurality of guide blocks 130 symmetrically arranged before and after;

[0051] Specifically, four limit bumps 120 distributed in a matrix are welded and fixed on the inner bottom surface of the outer sleeve frame body 110. The area surrounded by the four limit bumps 120 is adapted to the external dimensions of the monitoring component 500. Frame body chutes 111 with a T-shaped cross section are provided at the corner positions on the top surface of the outer sleeve frame body 110.

[0052] Furthermore, the guide blocks 130 are welded and fixed on the inner bottom surface of the outer sleeve frame body 110. The fixed top cover 200 is snap-fitted and fixed on the top surface of the outer sleeve frame body 110. A flip plate that can be opened is provided at the center position of the top surface of the fixed top cover 200.

[0053] Further, the outer jacket 110 is used to ensure the strength of the overall structure of the fixed frame 100. The frame chute 111 is used to provide a moving range for the structures in the transmission device 400. The limit bump 120 is used to limit the placement area of the monitoring component 500. The guide block 130 is used to displace the structures in the wiring device 300. The fixed top cover 200 and the fixed frame 100 cooperate to ensure that the monitoring component 500 is not interfered by external factors.

[0054] In this embodiment, as Figures 5 - 9 shown, the wiring device 300 includes a moving part 310, a plurality of line connectors 330 arranged inside the moving part 310, and a pressing part 320 arranged below the line connectors 330;

[0055] Specifically, the moving part 310 includes a moving slider 311, fixed toothed plates 312 arranged on the outer side walls of the left and right ends of the moving slider 311, and a plurality of regularly distributed pressing teeth 313.

[0056] Further, the moving slider 311 is slidably connected to the inner bottom surface of the outer jacket 110. Four block chutes 3110 that penetrate through the front and back and have a T-shaped longitudinal cross-section are formed inside the moving slider 311. The fixed toothed plates 312 are clamped and fixed to the outer side walls of the moving slider 311.

[0057] Further, the pressing teeth 313 are welded and fixed to the outer side walls of the moving slider 311. Inside the moving slider 311, line connectors 330 for connecting to the data line of the gravity sensor inside the electronic weighing scale are clamped and fixed above the block chutes 3110.

[0058] Further, the moving slider 311 is used to provide a placement base point for a plurality of line connectors 330. The block chutes 3110 are used to provide a moving range for the structures in the pressing part 320. The fixed toothed plates 312 move in cooperation with the devices in the transmission device 400. The pressing teeth 313 are used to cooperate with the structures in the pressing part 320 to ensure stable connection of the data line in the gravity sensor. After the fixed toothed plates 312 move, they drive a plurality of line connectors 330 to move towards the monitoring component 500.

[0059] In this embodiment, as Figures 7 - 8 shown, the pressing part 320 includes a sliding plate 321 and pressing teeth 324 that move as the sliding plate 321 moves;

[0060] Specifically, the sliding plate 321 is slidably connected to the inside of the block chute 3110. A limiting telescopic rod 322 is clamped and fixed below the pressing teeth 313 on the top surface of the sliding plate 321. A pressure spring 323 is sleeved outside the limiting telescopic rod 322. The bottom surface of the pressing teeth 324 is clamped and fixed to the top end of the limiting telescopic rod 322. The elastic force provided by the pressure spring 323 is used to push the pressing teeth 324 to move upward.

[0061] Further, during the process of the moving part 310 moving integrally towards the monitoring component 500, the bottom surface of the sliding plate 321 comes into contact with the top surface of the guiding block 130, and moves upward within the block chute 3110, thereby increasing the elastic potential energy of the pressure spring 323, and thus increasing the acting force exerted by the pressure spring 323 on the pressing teeth 324.

[0062] In this embodiment, as Figures 10 - 11 shown, the transmission device 400 includes a downward pressing tooth plate 410, a rotating cylinder tooth 420 that rotates as the downward pressing tooth plate 410 moves, a scroll spring 430 disposed inside the rotating cylinder tooth 420, and a limiting part 450 that cooperates with the rotation of the rotating cylinder tooth 420;

[0063] Specifically, the downward pressing tooth plate 410 is slidably connected to the inside of the frame chute 111. The rotating cylinder tooth 420 is rotatably connected to the inner side wall of the outer jacket frame 110. The rotating cylinder tooth 420 meshes with the fixed tooth plate 312 and the downward pressing tooth plate 410 respectively. A fixing rod 440 is welded and fixed at the central position of the scroll spring 430. The outer end of the scroll spring 430 is clamped and fixed to the inner cylinder wall of the rotating cylinder tooth 420. The end of the fixing rod 440 is clamped and fixed to the inner side wall of the outer jacket frame 110.

[0064] Further, after the fixed top cover 200 is buckled on the top surface of the outer jacket frame 110, at this time, the fixed tooth plate 312 moves downward under force, driving the rotating cylinder tooth 420 to rotate. Then, after the rotating cylinder tooth 420 contacts the fixed tooth plate 312, it drives the moving slider 311. When performing maintenance on the monitoring component 500 later, when the fixed top cover 200 is opened, the scroll spring 430 in the rotating cylinder tooth 420 will drive the rotating cylinder tooth 420 to rotate, cooperating with the rotating lead screw 453 and the moving moving slider 311, thereby completing the disassembly work of the monitoring component 500.

[0065] In this embodiment, as Figures 10 - 12 shown, the limiting part 450 includes a lead screw 453 that rotates as the rotating cylinder tooth 420 rotates and a limiting insertion block 455 that moves as the lead screw 453 rotates;

[0066] Specifically, the limiting part 450 further includes a bending plate 451 for providing a rotation range for the lead screw 453, a fixed tube 452 provided on the inner side wall of the bending plate 451, and a rod end gear 454 clamped and fixed at the end position of the lead screw 453. The transverse section of the bending plate 451 is L-shaped, and the fixed tube 452 is clamped and fixed on the outer side wall of the bending plate 451.

[0067] Further, the lead screw 453 is rotatably connected to the outer side wall of the bending plate 451. The inner end of the lead screw 453 is rotatably connected to the inner tube wall of the fixed tube 452. The rod end gear 454 meshes with the rotating cylinder gear 420. The outer circular plate of the limiting insert block 455 is threadedly connected to the lead screw 453 and slidably connected inside the fixed tube 452.

[0068] Further, when the rotating cylinder gear 420 rotates, the rod end gear 454 meshing with it rotates, driving the lead screw 453 to rotate, and then causing the limiting insert block 455 to move inside the fixed tube 452, so that the limiting insert block 455 moves towards the monitoring component 500.

[0069] In this embodiment, as Figure 13 shown, the monitoring component 500 includes a fixed box body 510, a monitoring module 520 provided inside the fixed box body 510, a plurality of docking sockets 530 provided at the front and rear ends of the fixed box body 510 and used to cooperate with the line connector 330, and convex frame blocks 540 provided at the corners of the outer side walls at the front and rear ends of the fixed box body 510;

[0070] Further, the fixed box body 510 is clamped and fixed on the inner bottom surface of the outer sleeve frame body 110. The monitoring module 520 is fixedly connected to the inside of the fixed box body 510 by screws. Both the docking socket 530 and the convex frame block 540 are fixedly connected to the fixed box body 510 by screws. The inner frame of the convex frame block 540 is grooved to match the size of the square block at the end of the limiting insert block 455.

[0071] Further, the fixed box body 510 is used to provide a placement range for the monitoring module 520. The docking socket 530 is used to cooperate with the line connector 330 to send the circuit signal of the gravity sensor data line into the inside of the monitoring module 520. After the limiting insert block 455 is inserted into the inside of the convex frame block 540, the whole monitoring component 500 is limited.

[0072] When the electronic weighing scale circuit monitoring device of the present invention is in use, first, the lines in the gravity sensor and the weight display data line are separated and directly inserted into the inside of the line connector 330 in the wiring device 300, and the fixed top cover 200 is buckled on the top surface of the outer sleeve frame body 110;

[0073] At this time, the fixed tooth plate 312 in the transmission device 400 moves downward after being stressed, driving the rotating cylinder tooth 420 to rotate. Then, after the rotating cylinder tooth 420 contacts the fixed tooth plate 312, it drives the moving slider 311 to move inward;

[0074] Next, during the process of the moving slider 311 moving towards the monitoring component 500, the line connector 330 is inserted into the inside of the docking socket 530. At the same time, during the movement of the sliding plate 321 in the extrusion part 320, it contacts the top surface of the guide block 130 and moves upward in the block chute 3110, thereby increasing the elastic potential energy of the compression spring 323, and thus increasing the acting force exerted by the compression spring 323 on the extrusion tooth 324;

[0075] When the rotating cylinder tooth 420 rotates, the rod end gear 454 meshing with it rotates, driving the lead screw 453 to rotate. Then, the limit insertion block 455 moves within the fixed tube 452 and inserts into the inside of the outer convex frame block 540 to limit the entire monitoring component 500;

[0076] When performing maintenance on the monitoring component 500 later, while opening the fixed top cover 200, the scroll spring 430 in the rotating cylinder tooth 420 drives the rotating cylinder tooth 420 to rotate, cooperating with the rotating lead screw 453 and the moving moving slider 311 to complete the disassembly work of the monitoring component 500.

[0077] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and obviously, many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the specification and its equivalents.

Claims

1. An electronic weighing scale circuit monitoring device, comprising a fixed frame (100), a fixed top cover (200) fixed on the top surface of the fixed frame (100), a wiring device (300) arranged at the front and rear ends of the fixed frame (100), a transmission device (400) arranged at the inner corner positions of the fixed frame (100), and a monitoring component (500) for monitoring the circuit in real time; It is characterized in that: The fixed frame (100) includes an outer frame body (110) and a number of symmetrically arranged guiding blocks (130) in the front and rear; The wiring device (300) includes a moving part (310), a number of circuit connectors (330) arranged inside the moving part (310), and a pressing part (320) arranged below the circuit connectors (330); The moving part (310) includes a moving slider (311), fixed toothed plates (312) arranged on the outer side walls of the left and right ends of the moving slider (311), and a number of regularly distributed pressing teeth (313); The pressing part (320) includes a sliding plate (321) and pressing teeth (324) that move as the sliding plate (321) moves; The transmission device (400) includes a downward pressing toothed plate (410), a rotating cylinder tooth (420) that rotates as the downward pressing toothed plate (410) moves, a scroll spring (430) arranged inside the rotating cylinder tooth (420), and a limiting part (450) that cooperates with the rotation of the rotating cylinder tooth (420); The limiting part (450) includes a lead screw (453) that rotates as the rotating cylinder tooth (420) rotates and a limiting insertion block (455) that moves as the lead screw (453) rotates; The monitoring component (500) includes a fixed box body (510), a monitoring module (520) arranged inside the fixed box body (510), a number of docking sockets (530) arranged at the front and rear ends of the fixed box body (510) and used to cooperate with the circuit connectors (330), and outer convex frame blocks (540) arranged at the outer side wall corners of the front and rear ends of the fixed box body (510).

2. The electronic weight-checking scale circuit monitoring device according to claim 1, characterized in that: Four limit bumps (120) distributed in a matrix are welded and fixed on the inner bottom surface of the outer frame body (110). The area enclosed by the four limit bumps (120) is adapted to the external dimensions of the monitoring component (500). Frame body chutes (111) with a T-shaped transverse cross-section are provided at the corner positions of the top surface of the outer frame body (110).

3. The electronic weighing scale circuit monitoring device according to claim 1, characterized in that: The guiding blocks (130) are welded and fixed on the inner bottom surface of the outer frame body (110). The fixed top cover (200) is snap-fixed on the top surface of the outer frame body (110). A flip plate that can be opened is provided at the center position of the top surface of the fixed top cover (200).

4. The electronic weighing scale circuit monitoring device according to claim 1, wherein: The moving slider (311) is slidably connected to the inner bottom surface of the outer frame body (110). Four through holes that are longitudinally T-shaped in cross-section are provided inside the moving slider (311). The fixed toothed plates (312) are snap-fixed on the outer side walls of the moving slider (311).

5. The electronic weighing scale circuit monitoring device according to claim 1, characterized in that: The pressing teeth (313) are fixedly welded to the outer side wall of the moving slider (311), and a circuit connector (330) for connecting with the data line of the gravity sensor inside the electronic weighing scale is fixedly clamped above the block chute (3110) inside the moving slider (311).

6. The electronic weight-checking scale circuit monitoring device according to claim 5, wherein: The sliding plate (321) is slidably connected to the inside of the block chute (3110). A limiting telescopic rod (322) is fixedly clamped on the top surface of the sliding plate (321) below the pressing teeth (313). A pressure spring (323) is sleeved outside the limiting telescopic rod (322). The bottom surface of the extrusion teeth (324) is fixedly clamped to the top end of the limiting telescopic rod (322), and the elastic force provided by the pressure spring (323) is used to push the extrusion teeth (324) to move upward.

7. The electronic weight-checking scale circuit monitoring device according to claim 2, characterized in that: The downward pressing tooth plate (410) is slidably connected to the inside of the frame chute (111). The rotating cylinder teeth (420) are rotatably connected to the inner side wall of the outer sleeve frame (110). The rotating cylinder teeth (420) are respectively meshed with the fixed tooth plate (312) and the downward pressing tooth plate (410). A fixed rod (440) is fixedly welded at the central position of the scroll spring (430). The outer end of the scroll spring (430) is fixedly clamped to the inner cylinder wall of the rotating cylinder teeth (420). The end of the fixed rod (440) is fixedly clamped to the inner side wall of the outer sleeve frame (110).

8. The electronic weight-checking scale circuit monitoring device according to claim 1, wherein: The limiting part (450) further includes a bending plate (451) for providing a rotating range for the lead screw (453), a fixed tube (452) arranged on the inner side wall of the bending plate (451), and a rod end gear (454) fixedly clamped at the end position of the lead screw (453). The transverse section of the bending plate (451) is L-shaped, and the fixed tube (452) is fixedly clamped to the outer side wall of the bending plate (451).

9. The electronic weight-checking scale circuit monitoring device according to claim 8, wherein: The lead screw (453) is rotatably connected to the outer side wall of the bending plate (451). The inner end of the lead screw (453) is rotatably connected to the inner tube wall of the fixed tube (452). The rod end gear (454) is meshed with the rotating cylinder teeth (420). The outer circular plate of the limiting plug (455) is threadedly connected to the lead screw (453) and is slidably connected to the inside of the fixed tube (452).

10. The electronic weight checker circuit monitoring device according to claim 1, characterized in that: The fixed box body (510) is fixedly clamped to the inner bottom surface of the outer sleeve frame (110). The monitoring module (520) is fixedly connected to the inside of the fixed box body (510) by screws. Both the docking socket (530) and the outer convex frame block (540) are fixedly connected to the fixed box body (510) by screws. The inner frame slot of the outer convex frame block (540) is adapted to the size of the square block at the end of the limiting plug (455).

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