Sensor assembly and electronic scale

By employing a dual-sensor assembly in the electronic scale, which connects the weighing end and the base respectively to form a symmetrical force transmission link, the problem of measurement interruption or data inaccuracy in the traditional single-sensor design is solved, and the measurement continuity and stability of the electronic scale are realized.

CN224535215UActive Publication Date: 2026-07-21宁波佩萨莫伦称重系统有限公司
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Patent Information

Application Number
CN202521996572.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-17
Publication Date
2026-07-21
Estimated Expiration
2035-09-17

AI Technical Summary

Technical Problem

Traditional electronic scales, which use a single sensor, are prone to malfunctions that can cause deviations between measured and actual values, affecting measurement accuracy.

Method used

The system employs a dual-sensor assembly, which is connected to the weighing end and the base respectively, forming a symmetrical force transmission link. When one sensor fails, the other sensor can still independently bear and transmit the weighing load, ensuring the continuity and accuracy of the measurement data.

Benefits of technology

It effectively solves the problem of measurement interruption or data inaccuracy in traditional single sensor design, and improves the measurement continuity and stability of electronic scales, especially the measurement accuracy under complex working conditions.

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Abstract

The utility model provides a kind of sensor assembly and electronic scale, it is related to electronic scale technical field, sensor assembly includes component body and sensor, two sensors are respectively arranged in the opposite two sides of component body, the load end of a sensor is used to connect with the weighing end of electronic scale, the load end of another sensor is used to connect with the base of electronic scale.The utility model can effectively improve the accuracy of electronic scale measurement.
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Description

Technical Field

[0001] This utility model relates to the field of electronic scale technology, and more specifically, to a sensor assembly and an electronic scale. Background Technology

[0002] With the increasing demand for measurement accuracy in trade settlement, industrial production, and logistics warehousing, electronic scales have gradually evolved from traditional mechanical scales into intelligent measurement devices centered on sensors. Sensors, based on the principle of electrical signal conversion, achieve high precision, rapid response, and digital output in weight measurement, driving the widespread application of electronic scales in scenarios such as factory production line material dispensing and automated express sorting.

[0003] However, traditional electronic scales typically use a single sensor, which is a single-point-of-failure structure. Once the sensor itself (such as strain gauge damage, circuit failure, or off-center load) malfunctions, the measured value may deviate from the actual value, affecting the accuracy of the electronic scale's measurement. Utility Model Content

[0004] The problem this invention addresses is: how to improve the accuracy of measurements taken by electronic scales.

[0005] To address the aforementioned problems, this utility model provides a sensor assembly and an electronic scale.

[0006] In a first aspect, the present invention provides a sensor assembly, including an assembly body and sensors, with two sensors respectively disposed on opposite sides of the assembly body. The load end of one sensor is used to connect to the weighing end of an electronic scale, and the load end of the other sensor is used to connect to the base of the electronic scale.

[0007] Optionally, the component further includes a limiting member, through which the end of the component body away from the sensor is connected to the base.

[0008] Optionally, the limiting component includes a limiting rod, one end of which is connected to the base, and a limiting hole is provided at the end of the component body away from the sensor, the limiting hole being sleeved on the limiting rod.

[0009] Optionally, the component further includes a base fixing plate, one end of which is connected to the load end of the sensor, the other end of which is connected to one end of the limiting rod, and the bottom surface of which is connected to the base.

[0010] Optionally, the component further includes a weighing fixing plate, the middle of the bottom surface of which is connected to the load end of the sensor, and the top surface of which is connected to the weighing end.

[0011] Optionally, the component further includes connectors, with the connectors respectively provided between the load end of the sensor and the base fixing plate, and between the load end of the sensor and the weighing fixing plate.

[0012] Optionally, the component body and the sensor are respectively provided with recesses at the matching positions, and the sensors are respectively disposed in the recesses.

[0013] Optionally, the end of the sensor away from the load end is provided with a protrusion facing the component body, and the sensor is connected to the bottom surface of the recess through the protrusion.

[0014] Optionally, the sensor is a shear beam sensor.

[0015] Secondly, this utility model provides an electronic scale, including the sensor assembly described above.

[0016] The beneficial effects of the sensor assembly of this utility model are as follows: Two sensors are symmetrically arranged on opposite sides of the assembly body, with the load ends of the two sensors connected to the weighing end and the base respectively, forming a symmetrical force transmission link of "weighing end - sensor - assembly body - sensor - base". When one of the two sensors fails, the other normal sensor can still independently bear and transmit the weighing load, continuously providing measurement data for the electronic scale. This solution effectively solves the problem in traditional single-sensor designs where sensor failure leads to measurement interruption or data inaccuracy, significantly improving the continuity of the electronic scale's measurement process, while ensuring its measurement stability and data accuracy under complex working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sensor assembly in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the electronic scale in an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures: 01-Component body; 02-Sensor; 03-Limit rod; 04-Limit hole; 05-Base fixing plate; 06-Weighing fixing plate; 07-Connector; 08-Recess; 09-Protrusion; 10-Weighing end; 11-Base. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0020] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] Combination Figure 1 and Figure 2 As shown in the figure, a sensor assembly provided in this embodiment of the present invention includes an assembly body 01 and two sensors 02. The two sensors 02 are respectively disposed on opposite sides of the assembly body 01. The load end of one sensor 02 is used to connect to the weighing end 10 of the electronic scale, and the load end of the other sensor 02 is used to connect to the base 11 of the electronic scale.

[0023] Specifically, the component body 01, serving as the core load-bearing and positioning foundation, can be made of materials with a certain degree of rigidity, such as aluminum alloy or engineering plastics. Its primary function is to prevent deformation under stress from interfering with measurement accuracy. Simultaneously, it provides a stable mounting platform for the two sensors 02. By fixing the two sensors 02 to opposite sides of the component body 01 (e.g., corresponding upper and lower sides), and ensuring that the sensor 02's installation positions are coaxial or symmetrically distributed, the force direction of the two sensors 02 is ensured to be consistent. Furthermore, the component body 01 can further fix the position of the sensors 02 through structural designs such as adding reinforcing ribs and limiting components, preventing displacement of the sensors 02 during long-term use, thereby ensuring measurement stability. The two sensors 02 serve as core measuring elements. The main function of the load end of one sensor 02 is to connect to the weighing end 10 of the electronic scale, specifically to the load-bearing bracket or force transmission component below the weighing pan. This allows the weight of the object supported by the weighing pan to be accurately transmitted to the sensor 02 during weighing, achieving initial weight signal acquisition. The fixed end is fixedly connected to the component body 01. Similarly, the main function of the load end of the other sensor 02 is to connect to the base 11 of the electronic scale, which can dock with the support frame or fixed seat of the base 11, and its fixed end is also connected to the component body 01. Thus, through the transition of the two sensors 02, a complete force transmission path is formed from the weighing end 10 (weighing pan) to the component body 01 and then to the base 11. Moreover, this symmetrical layout of the two sensors 02 can effectively balance the effects of unbalanced loads that may be caused by unilateral force, reduce measurement errors caused by uneven force on a single sensor 02, and further improve the measurement accuracy of the electronic scale.

[0024] For example, when in use, the electronic scale can acquire the measurement values ​​of two sensors separately and determine the actual measurement value based on the values ​​of the two side beams. For instance, the average of the measurement values ​​of the two sensors can be used as the actual measurement value. Simultaneously, the status of the two sensors can be determined by comparing the difference between their measurement values ​​and a preset threshold. For example, if the difference is greater than the preset threshold, it can be determined that the detection deviation of the two sensors is too large, possibly due to a malfunction in one or both. This can be detected using calibrated weights. When the sensor's measurement value is the same as or close to the calibrated weight, the sensor can be considered normal. When the sensor's measurement value differs significantly from the calibrated weight, the sensor can be considered faulty. In this case, the measurement value of the normal sensor can be used as the final measurement result of the component, and the faulty sensor can be replaced when convenient, thereby ensuring the accuracy of the electronic scale's measurement and enabling it to consistently output accurate measurement results.

[0025] In this embodiment, two sensors 02 are symmetrically arranged on opposite sides of the component body 01. The load ends of the two sensors 02 are connected to the weighing end 10 and the base 11, respectively, forming a symmetrical force transmission link of "weighing end 10 - sensor 02 - component body 01 - sensor 02 - base 11". When one of the two sensors 02 fails, the other normal sensor 02 can still independently bear and transmit the weighing load, continuously providing measurement data for the electronic scale. This solution effectively solves the problem in traditional single-sensor 02 designs where sensor 02 failure leads to measurement interruption or data inaccuracy, significantly improving the continuity of the electronic scale's measurement process, while ensuring its measurement stability and data accuracy under complex working conditions, such as temperature adaptability, vibration stability, and accuracy decay after long-term use.

[0026] Optionally, combined Figure 1 and Figure 2 As shown, the component also includes a limiting member, and the end of the component body 01 away from the sensor 02 is connected to the base 11 through the limiting member.

[0027] In this optional embodiment, the limiting component serves as a key auxiliary structure in the sensor assembly. Its installation position and functional design are closely adapted to the overall force transmission and stability requirements of the assembly. The limiting component is connected between the end of the assembly body 01 furthest from the sensor 02 and the base 11 of the electronic scale. Through the function of the limiting component, the sensor assembly is prevented from shifting or flipping during force application. This limiting of the assembly body 01 ensures the stability of the dual sensors 02 mounted on it, providing a stable structural foundation for accurate measurement by the dual sensors 02. For example, during the use of the electronic scale, the weighing end 10 (weighing pan) may experience horizontal forces due to object placement deviation or external impact. If only the connection between the sensor 02 and the assembly body 01 and the base 11 is relied upon, the assembly body 01 is prone to horizontal sliding or tilting, causing the force transmission axes of the upper and lower sensors 02 to deviate from the vertical direction (the core design of the sensor 02 is to bear vertical weight), thereby introducing lateral forces that interfere with measurement accuracy. The limiting component, through a rigid or semi-rigid connection with the base 11 (such as a locating pin engaging with a slot in the base 11, or an elastic guide sleeve adapting to a boss in the base 11), can limit the horizontal displacement of the component body 01 within a fixed range (e.g., 0.1 to 0.5 mm), ensuring that the upper and lower sensors 02 are always in a vertical force transmission state, avoiding additional deformation and signal errors of the sensor 02 caused by lateral forces. Simultaneously, it can also buffer impacts and provide overload protection. For example, when the electronic scale is subjected to a sudden impact (such as a heavy object being quickly placed on the weighing pan) or a short-term overload (a weight slightly exceeding the weighing range), although the upper and lower sensors 02 can withstand the vertical load, the component body 01 may experience an instantaneous excessive vertical displacement (or slight tilt) due to the impact force. Over time, this can easily lead to fatigue of the sensor 02's elastic body or even loosening of the wiring terminals. The limiting component can absorb some impact energy through its own structural characteristics (such as the compression buffer of the elastic limiting block and the stroke blocking of the rigid limiting post), while limiting the maximum vertical displacement of the component body 01 (e.g., within 1 to 2 mm), preventing the sensor 02 from being damaged due to excessive deformation. This extends the life of the sensor 02 and ensures the stability of long-term measurement accuracy. In addition, the design of the limiting component must also consider installation compatibility. Its connection method must facilitate the disassembly and maintenance of the component (e.g., using threaded connections or snap-fit ​​assembly), while avoiding interference with the load end of the lower sensor 02. This ensures that the limiting component only plays the role of "limiting and stabilizing" and does not participate in the transmission of weight signals, preventing the introduction of additional force interference. Ultimately, it works in conjunction with the upper and lower sensors 02 and the component body 01 to construct a component system that is "precise in force transmission, stable in attitude, and strong in anti-interference." Optionally, the limiting component includes a limiting rod 03, one end of which is connected to the base 11, and a limiting hole 04 is provided at the end of the component body 01 away from the sensor 02, the limiting hole 04 being sleeved on the limiting rod 03.

[0028] In this optional embodiment, the limiting component can be a limiting rod 03. The limiting rod 03, as a limiting carrier, is usually made of rigid or semi-rigid material (such as stainless steel rod, reinforced nylon rod, etc.) and needs to have a certain bending strength to avoid deformation failure. One end of the limiting rod 03 can be firmly connected to the base 11 by threaded connection, snap-fit ​​fixation, or welding to ensure no relative displacement between it and the base 11. The other end can be a smooth cylinder (or with a slight guide taper) as the mating end for insertion into the limiting hole 04. The limiting hole 04 is opened at the end of the component body 01 away from the sensor 02, not at the mounting end of the upper and lower sensors 02. Its hole diameter design needs to form a precise fit with the diameter of the limiting rod 03: a fitting gap of 0.1 to 0.3 mm can be reserved to avoid limiting failure due to excessive gap and to prevent jamming when the component body 01 deforms due to excessive gap. A wear-resistant bushing (such as a polytetrafluoroethylene bushing) can also be added to the inner wall of the limiting hole 04 to reduce the gap expansion caused by long-term friction and ensure the durability of the limiting accuracy. The limiting rod 03 and the limiting hole 04 are fitted together. In the horizontal direction, the limiting hole 04 is fitted onto the limiting rod 03. When the component body 01 has a tendency to move horizontally due to the off-center load of the weighing end 10 or the impact of external force, the inner wall of the limiting hole 04 will form a rigid contact with the outer wall of the limiting rod 03, directly limiting the lateral movement range of the component body 01 (usually controlling the horizontal displacement within 0.1 to 0.5 mm). This prevents the component body 01 from shifting and causing the force transmission axis of the upper and lower sensors 02 to deviate from the vertical direction, thereby preventing the lateral force from being transmitted to the sensor 02 through the component body 01, preventing the sensor 02 from generating signal errors due to additional lateral deformation, and ensuring that the weight signal originates only from the vertical load. Furthermore, for vertical overload protection, the length of the limit rod 03 can be precisely designed according to the safe travel of the sensor 02. When the electronic scale is subjected to a sudden impact (such as a heavy object falling onto the weighing pan), the component body 01 will displace downward with the impact force. At this time, the limit hole 04 will slide along the axial direction of the limit rod 03 until the bottom of the limit hole 04 contacts the limit step on the limit rod 03 (this limit step can be set at a preset position on the limit rod 03 according to actual use needs to prevent excessive displacement of the component body 01 during the falling process). The rigid support of the limit rod 03 limits the maximum vertical displacement of the component body 01 (such as controlling it within 1 to 2 mm), avoiding excessive deformation of the upper and lower sensors 02, which can cause fatigue of the elastomer or loosening of the wiring terminals. This protects the core components of the sensor 02 and maintains the stability of long-term measurement accuracy. Furthermore, through the guiding cooperation of the rod and the hole, even in an industrial vibration environment, the component body 01 can be guided to always maintain a relatively parallel posture with the base 11. The limiting rod 03 can prevent the component body 01 from tilting, twisting or other posture deviations, ensuring that the upper and lower sensors 02 are always in a symmetrical force state, further offsetting the measurement error caused by the off-center load, and forming a synergy with the symmetrical force transmission of the upper and lower sensors 02 to improve the repeatability accuracy of multiple measurements. Optionally, combined Figure 1 and Figure 2 As shown, the component also includes a base fixing plate 05, one end of which is connected to the load end of the sensor 02, the other end of which is connected to one end of the limiting rod 03, and the bottom surface of the base fixing plate 05 is connected to the base 11.

[0029] In this optional embodiment, the base fixing plate 05 serves as the connection and load-bearing structure between the sensor assembly and the base 11. It can be made of stainless steel or high-strength aluminum alloy with a preset thickness (e.g., 3 to 5 mm) to ensure rigidity without significant deformation. One end of the base fixing plate 05 is connected to the load end of the sensor 02, and can be adapted according to the interface type (e.g., threaded hole with high-strength bolt) while maintaining coaxiality (coaxiality error 0.05 to 0.1 mm) to ensure weight transmission without loss. The base fixing plate 05 is connected to the limiting rod 03 via positioning holes (e.g., fitting clearance 0.02 to 0.05 mm, perpendicularity error ≤ 0.1°), providing a precise reference for the limiting fit. The bottom surface of the base fixing plate 05 is connected to the base 11 via bolts (with anti-slip washers). The bottom surface can be surface-ground (flatness error ≤ 0.03 mm) to ensure a complete fit. The sensor 02 and the limiting rod 03 are first precisely positioned on the base plate 05 (position deviation ≤ 0.1mm) and then connected to the base 11 as a whole, avoiding positional deviations when connected separately. Furthermore, the base plate 05 evenly transmits the weight borne by the sensor 02 (especially in heavy weighing scenarios) and the force borne by the limiting rod 03 to the base 11, preventing local deformation of the base 11.

[0030] Optionally, combined Figure 1 and Figure 2 As shown, the component also includes a weighing fixing plate 06, the middle part of the bottom surface of the weighing fixing plate 06 is connected to the load end of the sensor 02, and the top surface of the weighing fixing plate 06 is connected to the weighing end 10.

[0031] In this optional embodiment, the weighing fixing plate 06 is the core transition structure connecting the sensor 02 and the weighing end 10 of the electronic scale. It can be made of rigid material (such as aluminum alloy or stainless steel) to avoid its own deformation interfering with force transmission. The middle part of the bottom surface of the weighing fixing plate 06 is adapted to the load end of the sensor 02 (e.g., through threaded holes or snap fasteners to ensure coaxiality error ≤ 0.1mm), and the top surface of the weighing fixing plate 06 is firmly connected to the weighing end 10 (weighing pan or load-bearing bracket). The middle connection method can ensure that the weight of the object borne by the weighing end 10 is transmitted to the load end of the sensor 02 in the vertical direction without deviation or loss, avoiding off-center loading error caused by connection eccentricity. The weighing fixing plate 06 provides a stable installation reference for the weighing end 10, unifies the weight transmission path (forming an efficient force transmission link of "weighing end 10 - weighing fixing plate 06 - sensor 02"), reduces signal distortion that may be caused by shaking or displacement of the weighing end 10, and buffers possible slight impacts on the weighing end 10 (such as the instantaneous force when an object is placed), protecting the elastomer of sensor 02 from direct impact damage. At the same time, it simplifies the assembly process (integrating the scattered connection between the weighing end 10 and sensor 02 into the centralized connection of the fixing plate). Finally, in conjunction with the upper and lower symmetrical sensors 02, component body 01, etc., it ensures the accuracy and stability of the electronic scale's weight signal acquisition.

[0032] Optionally, combined Figure 1 and Figure 2 As shown, the component also includes connectors 07, which are respectively provided between the load end of the sensor 02 and the base fixing plate 05, and between the load end of the sensor 02 and the weighing fixing plate 06.

[0033] In this optional embodiment, connector 07 serves as a crucial connecting component between the load end of sensor 02 and the base fixing plate 05 and weighing fixing plate 06. Its design must precisely match the force transmission requirements and installation characteristics of the two connection scenarios. It is typically made of high-strength engineering plastics (such as PA66 + glass fiber) or surface-plated galvanized alloy to ensure sufficient rigidity to prevent force transmission loss due to deformation, while also possessing a certain degree of corrosion resistance to cope with humid and dusty environments. In some scenarios, its surface is anodized or passivated to improve wear resistance and rust prevention. Connector 07 between the load end of sensor 02 and the base fixing plate 05 needs to be adapted to the requirements of vertical downward force transmission and stable fixation. Connector 07 between the load end of sensor 02 and the weighing fixing plate 06 needs to be adapted to bear the weight of the weighing end 10 and transmit it upwards, adapting to the requirement of connecting to the middle of the weighing fixing plate 06. Connector 07 allows for the movable connection of the two sensors 02 to their respective base fixing plates 05 and weighing fixing plates 06, facilitating subsequent maintenance and debugging.

[0034] Optionally, combined Figure 1 and Figure 2As shown, the component body 01 and the sensor 02 are respectively provided with recesses 08 at their matching positions, and the sensor 02 is respectively disposed at the recesses 08.

[0035] In this optional embodiment, recesses 08 are respectively provided on the component body 01 at the matching positions of the sensor 02. The structure of the recesses 08 is to realize the precise installation and stable operation of the sensor 02. The position completely corresponds to the symmetrical layout of the sensor 02, that is, the recesses 08 are also symmetrically distributed on opposite sides of the component body 01. The shape fits the shape of the mounting end of the sensor 02 (the size of the recesses 08 matches the size of the sensor 02). The depth of the recesses 08 matches the height of the mounting end of the sensor 02. If the mounting end protrudes by 5mm, the depth is set to 5±0.1mm to ensure that the load end of the sensor 02 has sufficient stroke in the vertical direction. The recesses 08 are equivalent to the mounting reference groove of the sensor 02, which can realize fast and accurate positioning. Setting it in the recess ensures that the axis of the sensor 02 is coaxial with the force transmission axis of the component body 01, with a coaxiality error ≤0.05mm, improving positioning efficiency, avoiding manual installation tilting, and laying the foundation for subsequent docking with the connector 07 and the fixing plate.

[0036] Optionally, the end of the sensor 02 away from the load end is provided with a protrusion 09 facing the component body 01, and the sensor 02 is connected to the bottom surface of the recess 08 through the protrusion 09.

[0037] In this optional embodiment, a protrusion 09 is provided on the side of the sensor 02 away from the load end and facing the component body 01. The protrusion 09 is a structure connected to the recess 08 of the component body 01. That is, the protrusion 09 structure is connected to the plane at the recess 08, so that the load end of the sensor 02 can form a gap with the plane at the recess 08. This gap is the travel range of the load end in the vertical direction of the weighing process, so that the sensor 02 can have sufficient deformation space and ensure that the sensor 02 can perform accurate measurement in the effective travel range.

[0038] Optionally, the sensor 02 is a shear beam sensor.

[0039] In this optional embodiment, the shear beam sensor is a weighing and force sensor based on the resistance strain effect, using shear strain as the measurement basis. Its core component is a beam-shaped elastic body. The strain gauge is attached to the area of ​​the elastic body where the shear stress is most significant. When an external force is applied, the elastic body undergoes shear deformation, causing a corresponding change in the resistance value of the strain gauge. The measurement circuit then converts this resistance change into an electrical signal output proportional to the external force. This sensor has advantages such as strong resistance to off-center loads, compact structure, convenient installation, high measurement accuracy, and good long-term stability, and is widely used in scenarios such as weighbridges, platform scales, tank weighing, and force measurement in industrial processes.

[0040] This utility model provides an electronic scale, which includes the sensor assembly described above.

[0041] The vehicle in this embodiment has the same beneficial effects over the prior art as the sensor components described above, and will not be repeated here.

[0042] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A sensor assembly, characterized in that, The system includes a component body (01) and a sensor (02). The two sensors (02) are respectively disposed on opposite sides of the component body (01). The load end of one sensor (02) is used to connect to the weighing end (10) of the electronic scale, and the load end of the other sensor (02) is used to connect to the base (11) of the electronic scale.

2. The sensor assembly according to claim 1, characterized in that, It also includes a limiting member, and one end of the component body (01) away from the sensor (02) is connected to the base (11) through the limiting member.

3. The sensor assembly according to claim 2, characterized in that, The limiting component includes a limiting rod (03), one end of which is connected to the base (11). A limiting hole (04) is provided at the end of the component body (01) away from the sensor (02), and the limiting hole (04) is sleeved on the limiting rod (03).

4. The sensor assembly according to claim 3, characterized in that, It also includes a base fixing plate (05), one end of which is connected to the load end of the sensor (02), the other end of which is connected to one end of the limiting rod (03), and the bottom surface of the base fixing plate (05) is connected to the base (11).

5. The sensor assembly according to claim 4, characterized in that, It also includes a weighing fixing plate (06), the middle part of the bottom surface of the weighing fixing plate (06) is connected to the load end of the sensor (02), and the top surface of the weighing fixing plate (06) is connected to the weighing end (10).

6. The sensor assembly according to claim 5, characterized in that, It also includes connectors (07), which are respectively provided between the load end of the sensor (02) and the base fixing plate (05) and between the load end of the sensor (02) and the weighing fixing plate (06).

7. The sensor assembly according to claim 1, characterized in that, The component body (01) and the sensor (02) are respectively provided with recesses (08) at their matching positions, and the sensor (02) is respectively disposed at the recesses (08).

8. The sensor assembly according to claim 7, characterized in that, The sensor (02) has a protrusion (09) facing the component body (01) at one end away from the load end, and the sensor (02) is connected to the bottom surface of the recess (08) through the protrusion (09).

9. The sensor assembly according to claim 1, characterized in that, The sensor (02) is a shear beam sensor.

10. An electronic scale, characterized in that, Includes the sensor assembly as described in any one of claims 1-9.