Portable body weight measuring method and device

Abstract

The invention discloses a portable body weight measuring method and device, the device comprises a main scale body and a plurality of counterweight assemblies, and a folding disc is rotatably arranged on the main scale body. According to the portable body weight measuring device, the position of the balancing weight is adjusted through the first motor and the second motor, so that the numerical proportion of the sensors is optimal, the sensors uniformly share the weight, the influence of cross sensitivity is reduced, the overall weighing accuracy is improved, meanwhile, the magnetic attraction and the balls are matched, and the measurement accuracy is improved. The balancing weight can be conveniently moved, operation is more labor-saving and efficient, in the moving process, the position adjusting speed of the balancing weight can be remarkably increased through rotation of the balls, in addition, the friction force can be further reduced through lubricating treatment during rotation of the balls, and the service life of the balancing weight is prolonged. Therefore, the balancing weight can move more smoothly and easily, and cannot shake due to friction in the moving process, so that the balancing weight can move more accurately, and the error of weight measurement is reduced.

Description

Technical Field

[0001] This application relates to the technical field of body weight measurement, and particularly to a portable body weight measurement method and device. Background Art

[0002] With the development of society and the improvement of people's health awareness, body weight measurement, as an important part of health management, has become increasingly important. Whether it is for daily household use, professional needs in medical and health care institutions, or application scenarios in sports and fitness venues, the demand for portable body weight measurement devices is growing day by day.

[0003] However, traditional weighing scales have some limitations in design and technology, especially in ensuring high precision and stability. For example, many weighing scales use a single or a few sensors to detect weight. This may lead to situations where when the user's standing position deviates from the center, some sensors bear excessive pressure while others have relatively less. This imbalance not only affects the accuracy of the weighing result but may also cause cross-sensitivity problems, that is, a change in one sensor affects the reading of another sensor, thus affecting the accuracy of the final result. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems in the related art to some extent.

[0005] To this end, an object of this application is to provide a portable body weight measurement method and device. By obtaining sensor data in real time and analyzing the ratio, and combining with dynamically adjusting the position of the counterweight, the weighing accuracy can be optimized.

[0006] To achieve the above object, the first aspect embodiment of this application proposes a portable body weight measurement method, including the following steps: Step 1: After opening the folding tray, obtain the pressure data detected by the pressure sensors on the main scale and the folding tray through the control module, calculate the total weight and the load ratio of each sensor according to the obtained pressure data, define the ideal load ratio according to the sensor layout, compare the actual ratio with the ideal ratio, then calculate the measurement deviation, and identify the overloaded or underloaded sensor areas according to the calculated result; Step 2: Based on the overloaded or underloaded data, generate a counterweight adjustment instruction. Taking the center of the counterweight adjustment plane as the origin, establish a polar coordinate system, and calculate to minimize the difference between the actual ratio and the ideal ratio of each sensor: , and adjust to make the load of each sensor reach the ideal value range; Step 3: After the counterweight block moves, collect the sensor data again to verify the adjustment effect. If the deviation does not converge, iterate and execute the above steps until the ratios of all sensors reach the ideal value range. During the measurement process, only reactivate the counterweight adjustment instruction when the deviation exceeds the threshold (such as ±2%).

[0007] A portable weight measuring device includes: a folding tray rotatably arranged on the main weighing body, and when the folding tray is opened, it forms a bearing surface with the top surface of the main weighing body; weight sensors are respectively fixed on the main weighing body and the folding tray; four counterweight components are respectively arranged on the main weighing body and the folding tray; the counterweight components drive the counterweight block to move through a driving device to adjust the weighing value of the gravity sensor. The driving device is a belt or chain conveyor device.

[0008] In an embodiment of the present application, the driving device includes a first motor fixed on the main weighing body; a rotating plate is installed at the output end of the first motor; a moving groove is formed on the rotating plate; a counterweight block is slidably connected to the rotating plate; the counterweight block moves within the range of the moving groove driven by a second motor, and cooperates with the first motor to adjust the counterweight block to any position on the fan-shaped surface; a second motor is installed in the counterweight block; a gear is installed at the output end of the second motor; a toothed plate is installed on the rotating plate and meshes with the surface of the gear; two limiting rods are oppositely arranged on both sides of the counterweight block; a sliding mechanism is arranged on the counterweight block.

[0009] In an embodiment of the present application, the counterweight blocks are respectively connected to the main weighing body and the folding tray through magnetic force mechanisms, enabling the counterweight components to rotate within a certain angle range and enabling the counterweight blocks to move to any position within the fan-shaped area.

[0010] In an embodiment of the present application, the magnetic force mechanism includes a magnetic attraction plate installed on the main weighing body; a magnetic suction cup is installed on the counterweight block; a plurality of rotating grooves are respectively formed on the counterweight block and the magnetic suction cup; a plurality of the balls are respectively rotatably arranged in the corresponding rotating grooves.

[0011] In an embodiment of the present application, the area of the corresponding balls wrapped by the plurality of rotating grooves is greater than one-half.

[0012] In an embodiment of the present application, the balls are connected to the counterweight block through lubricating components, enabling the balls to smoothly rotate within the counterweight block.

[0013] In one embodiment of the present application, the lubrication component includes a storage groove, a push spring, a pressure block and a sealing gasket, wherein the storage groove is opened inside the counterweight block, and the storage groove and the rotating groove are interconnected; one end of the push spring is connected to the storage groove; the pressure block is arranged in the storage groove, and the pressure block is connected to one end of the push spring; and the sealing gasket is installed on the pressure block.

[0014] In one embodiment of the present application, a locking rod is installed on the pressure block, and the locking rod is slidably connected to the counterweight block.

[0015] The portable weight measuring device of the embodiment of the present application can optimize the weighing accuracy by acquiring sensor data in real time and analyzing the ratio, combined with dynamically adjusting the position of the counterweight block. Then the first motor and the second motor adjust the position of the counterweight block to optimize the numerical ratio of each sensor, so that each sensor evenly shares the weight and reduces the influence of cross sensitivity, thereby improving the overall weighing accuracy. At the same time, the cooperation of magnetic attraction and ball bearings can realize the convenient movement of the counterweight block, making the operation more labor-saving and efficient. During the movement, the rotation of the ball bearings can significantly improve the position adjustment speed of the counterweight block. In addition, by lubricating the ball bearings when they rotate, the friction can be further reduced, so that the movement of the counterweight block is smoother and easier, and there will be no shaking due to friction during the movement, thereby making the movement of the counterweight block more accurate and reducing the error in weight measurement.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 It is a structural schematic diagram of a portable weight measuring device according to one embodiment of the present application; Figure 2 It is a three-dimensional diagram of the main scale body according to one embodiment of the present application; Figure 3 is a perspective view of a rotating plate according to an embodiment of the present application; Figure 4 is a three-dimensional diagram of a counterweight according to an embodiment of the present application; Figure 5 A bottom view of a counterweight according to an embodiment of the present application; Figure 6 is a cross-sectional view of a counterweight according to an embodiment of the present application; Figure 7 for Figure 6Enlarged view at location A in

[0018] As shown in the figure: 1. Main weighing body; 2. Folding tray; 3. Weight sensor; 4. Counterweight assembly; 41. First motor; 42. Rotating plate; 43. Moving groove; 44. Counterweight block; 45. Second motor; 46. Gear; 47. Rack; 48. Limiting rod; 49. Sliding mechanism; 491. Magnetic attraction plate; 492. Magnetic chuck; 493. Rotating groove; 494. Ball; 495. Lubricating component; 4951. Storage tank; 4952. Push spring; 4953. Pressure block; 4954. Sealing gasket. Specific implementation mode

[0019] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0020] The portable body weight measurement method and device of the embodiments of the present application will be described below with reference to the drawings.

[0021] Embodiment 1: As Figure 1 shown, the portable body weight measurement method of the embodiment of the present application includes the following steps: Step 1: Obtain the pressure data detected by multiple pressure sensors through the control module, calculate the total weight and the load ratio of each sensor according to the obtained pressure data, define the ideal load ratio according to the sensor layout, compare the actual ratio with the ideal ratio, then calculate the measurement deviation, and identify the overloaded or underloaded sensor area according to the calculation result; Read the weight values of all sensors in real time (for example, 4 sensors on the main weighing body , , , , 2 sensors on the folding tray , ), and calculate the ratio of each sensor: , if the sensors are evenly distributed and the carrier is completely horizontal, each sensor should evenly share the load, that is, the optimal ratio is: , adjusted according to the sensor position weight (for example, the weight of the sensors on the main weighing body is higher), it can be defined as: .

[0022] Step 2: Based on the overloaded or underloaded data, generate a counterweight block adjustment instruction, establish a polar coordinate system with the center of the adjustment plane of the counterweight block as the origin, and calculate the difference that minimizes the actual ratio and the ideal ratio of each sensor: , and adjust to make the load of each sensor reach the ideal value range; Taking four sensors as an example: calculate the gradient direction, assuming the initial step size α = 0.1: , and then through partial derivative calculation, adjust the counterweight to a new position (r = 0.2m, θ = 30°), update the sensor data (simulate the load change after adjustment), recalculate the deviation, continue to adjust, and finally adjust the counterweight to (r = 0.5m, θ = 60°). The sensor ratio approaches [24.8%, 24.7%, 25.1%, 25.4%], and the error < 1%.

[0023] The following are the simulation experiment data:

[0024] Step 3: After the counterweight moves, re-collect the sensor data to verify the adjustment effect. If the deviation does not converge, iterate and execute the above steps until the ratio of all sensors reaches the ideal value range. During the measurement process, only reactivate the counterweight adjustment instruction when the deviation exceeds the threshold (such as ±2%).

[0025] Using multiple sensors to detect the weight and adjusting the position of the counterweight to optimize the sensor readings, it can move on a plane and then adjust the angle and radius of the counterweight on the plane (i.e., the position in the polar coordinate system) so that the load ratio of each sensor reaches the preset optimal ratio, thereby reducing the measurement error and improving the accuracy of the overall weighing.

[0026] Embodiment 2: A portable weight measuring device, including: a folding tray 2 is rotatably arranged on the main weighing body 1, and after the folding tray is opened, it forms a bearing surface with the top surface of the main weighing body 1; weight sensors 3 are respectively fixed on the main weighing body 1 and the folding tray 2; four counterweight assemblies 4 are respectively arranged on the main weighing body 1 and the folding tray 2; the counterweight assembly 4 drives the counterweight to move through a driving device to adjust the weighing value of the gravity sensor. The driving device is a belt or chain conveying device.

[0027] In an embodiment of the present application, as Figure 2 and Figure 3 shown, the driving device includes a first motor 41 fixed on the main weighing body 1; a rotating plate 42 is installed at the output end of the first motor 41; a moving groove 43 is opened on the rotating plate 42; a counterweight 44 is slidably connected to the rotating plate 42.

[0028] The counterweight 44 has a diameter of 40mm - 60mm, a thickness of 5 - 15mm, and a weight of 145g - 160g.

[0029] The counterweight 44 moves within the range of the moving groove 43 driven by a second motor 45, and cooperates with the first motor 41 to adjust the counterweight 44 to any position on the fan-shaped surface.

[0030] It should be noted that the maximum rotation angle of the first motor 41 is less than 90 degrees, so that the rotating plates 42 on the multiple first motors 41 will not affect each other during rotation, and a communication groove is provided in the main weighing body 1. The communication groove facilitates the rotation of the rotating plate 42 in the main weighing body 1, so that the rotating plate 42 is not affected by any factors during rotation.

[0031] A second motor 45 is installed in the counterweight 44; a gear 46 is installed at the output end of the second motor 45; the toothed plate 47 is installed on the rotating plate 42 and meshes with the surface of the gear 46.

[0032] It should be noted that when the first motor 41 rotates, it will drive the counterweight 44 to move, and thus the angle of the counterweight 44 can be adjusted. When the second motor 45 rotates, it will also drive the counterweight 44 to move, and thus the position of the rotation radius of the counterweight 44 on the rotating plate 42 can be adjusted. The first motor 41 and the second motor 45 can operate synchronously to quickly adjust the counterweight 44.

[0033] Two of the limiting rods 48 are oppositely arranged on both sides of the counterweight 44; a sliding mechanism 49 is arranged on the counterweight 44.

[0034] Specifically, during actual implementation, it is necessary to adjust the position of the counterweight 44. During adjustment, the first motor 41 is controlled to rotate through a control switch. When the first motor 41 rotates, it will drive the rotating plate 42 to rotate. When the rotating plate 42 rotates, it will drive the second motor 45 to rotate. When the second motor 45 rotates, it will drive the counterweight 44 to rotate, and thus the position of the counterweight 44 can be adjusted. While the first motor 41 is running, the output end of the second motor 45 rotates. When the output end of the second motor 45 rotates, it will drive the gear 46 to rotate. Since the gear 46 and the toothed plate 47 are meshed, when the gear 46 rotates, it will move synchronously. When the gear 46 moves, it will drive the second motor 45 to move. When the second motor 45 moves, it will drive the counterweight 44 to move, and thus the position of the counterweight 44 can be adjusted.

[0035] In an embodiment of the present application, the counterweight 44 is respectively connected to the main weighing body 1 and the folding tray 2 through a magnetic mechanism, so that the counterweight assembly 4 can rotate within a 90-degree angle range, and the counterweight can move to any position within the fan-shaped area.

[0036] Embodiment 3: In an embodiment of the present application, as Figure 2 and Figure 5 shown, the magnetic mechanism includes a magnetic suction plate 491 installed on the main weighing body 1; a magnetic suction disc 492 is installed on the counterweight 44.

[0037] It should be noted that the adsorption force between the magnetic chuck 492 and the magnetic adsorption plate 491 should be greater than the gravity of the counterweight 44, so as to ensure the stable adsorption of the magnetic chuck 492 and the magnetic adsorption plate 491 and prevent them from falling during the movement of the counterweight 44.

[0038] A plurality of rotating grooves 493 are formed in both the counterweight 44 and the magnetic chuck 492; a plurality of the balls 494 are respectively rotatably arranged in the corresponding rotating grooves 493.

[0039] In the above process, the movement of the counterweight 44 usually depends on the sliding friction mechanism, which means that a large frictional force will hinder the smooth movement of the counterweight, reduce the adjustment efficiency. At the same time, the minute vibrations generated by the friction may also cause fluctuations in the measurement data, thereby affecting the measurement accuracy.

[0040] Specifically, in the actual adjustment process, the counterweight 44 is adsorbed and fixed by the adsorption force between the magnetic adsorption plate 491 and the magnetic chuck 492. Meanwhile, the balls 494 in the rotating grooves 493 are used to separate the magnetic adsorption plate 491 and the magnetic chuck 492, so that the magnetic adsorption plate 491 and the magnetic chuck 492 do not contact each other. Therefore, when the counterweight 44 is moved, the moving resistance caused by the frictional force generated by the contact between the magnetic adsorption plate 491 and the magnetic chuck 492 can be avoided, making the movement of the counterweight 44 faster and more labor-saving.

[0041] In an embodiment of the present application, as Figure 6 shown, the wrapping area of the corresponding rotating grooves 493 around the balls 494 is greater than one half.

[0042] It should be noted that the balls 494 are wrapped by the rotating grooves 493 to prevent the balls 494 from falling out when rotating in the rotating grooves 493.

[0043] In an embodiment of the present application, the balls 494 are connected to the counterweight 44 through a lubricating component 495, enabling the balls 494 to rotate smoothly within the counterweight 44.

[0044] Embodiment 4: In an embodiment of the present application, the lubricating component 495 includes a storage tank 4951, a pushing spring 4952, a pressure block 4953, and a sealing gasket 4954. Among them, the storage tank 4951 is formed inside the counterweight 44, and the storage tank 4951 communicates with the rotating groove 493.

[0045] It should be noted that the storage tank 4951 is filled with a certain amount of lubricating oil. Meanwhile, a replenishing valve for the lubricating oil is provided on one side of the storage tank 4951 to replenish the lubricating oil when it is insufficient. At the same time, one side of the ball 494 is located inside the storage tank 4951, enabling the ball 494 to dip the lubricating oil in the storage tank 4951.

[0046] One end of the pushing spring 4952 is connected to the storage groove 4951; the pressure block 4953 is arranged in the storage groove 4951, and the pressure block 4953 is connected to one end of the pushing spring 4952.

[0047] When the ball 494 rotates, the flexibility of the ball 494 determines the flexibility of the movement of the counterweight 44. If the rotation of the ball 494 is restricted, it will affect the flexible movement of the counterweight 44.

[0048] By dipping the ball 494 in lubricating oil, the frictional force between the ball 494, the counterweight 44 and the magnetic attraction plate 491 can be reduced, the flexibility of the ball 494 can be improved, and the smoothness of the movement of the counterweight 44 can be further improved.

[0049] It should be noted that the weight of the pressure block 4953 is greater than the elastic force of the pushing spring 4952. When the pressure block 4953 is above the pushing spring 4952, at this time, the pressure block 4953 squeezes the pushing spring 4952, causing the pushing spring 4952 to contract. At this time, the pressure block 4953 moves downward to squeeze the lubricating oil in the storage groove 4951, increasing the liquid level of the lubricating oil. Furthermore, the lubricating oil can contact the ball 494, so that when the ball 494 rotates, it can dip the lubricating oil in the storage groove 4951. When the pressure block 4953 is not above the pushing spring 4952, under the push of the pushing spring 4952, the pressure block 4953 moves towards the direction of the rotating groove 493, and then the pressure block 4953 drives the sealing gasket 4954 to move, so that the sealing gasket 4954 seals the connection between the rotating groove 493 and the storage groove 4951, ensuring that the lubricating oil in the storage groove 4951 does not leak when the main weighing body 1 is in a non-use state.

[0050] The sealing gasket 4954 is installed on the pressure block 4953.

[0051] It should be noted that the ball 494 is in close contact with the inner wall of the storage groove 4951. Furthermore, after the ball 494 dips in the lubricating oil, the inner wall of the storage groove 4951 scrapes off the dipped lubricating oil, preventing excessive lubricating oil on the ball 494 and resulting in waste of lubricating oil.

[0052] In an embodiment of the present application, a locking rod is installed on the pressure block 4953, and the locking rod is slidably connected to the counterweight 44.

[0053] It should be noted that the locking rod limits the pressure block 4953, so that the pressure block 4953 can only slide horizontally in the storage groove 4951.

[0054] In summary, the portable weight measuring device of the embodiment of the present application adjusts the position of the counterweight 44 through the first motor 41 and the second motor 45, so that the numerical ratio of each sensor reaches the optimal value, and each sensor evenly shares the weight, reducing the influence of cross sensitivity, thereby improving the accuracy of the overall weighing, and at the same time, by utilizing the cooperation of magnetic attraction and ball 494, the counterweight 44 can be conveniently moved, making the operation more labor-saving and efficient. During the movement, the rotation of the ball 494 can significantly improve the position adjustment speed of the counterweight 44. In addition, by lubricating the ball 494 when it rotates, the friction can be further reduced, so that the movement of the counterweight 44 is smoother and easier, and there will be no shaking due to friction during the movement, thereby making the movement of the counterweight more accurate and reducing the error in weight measurement.

[0055] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A portable weight measurement method, characterized in that, Including the following steps: Step 1: After opening the folding tray, obtain the pressure data detected by the pressure sensors on the main scale and the folding tray through the control module, calculate the total weight and the load ratio of each sensor based on the obtained pressure data, define the ideal load ratio according to the sensor layout, compare the actual ratio with the ideal ratio, then calculate the measurement deviation, and identify the overloaded or underloaded sensor areas based on the calculation results; Step 2: Generate a counterweight adjustment instruction based on overloaded or underloaded data. Taking the center of the counterweight adjustment plane as the origin, establish a polar coordinate system , calculate the difference between the actual ratio and the ideal ratio of each sensor to minimize: , by adjusting and make the load of each sensor reach the ideal value range; Step 3: After the counterweight block moves, re-collect the sensor data to verify the adjustment effect. If the deviation does not converge, iterate and execute the above steps until the ratios of all sensors reach within the ideal value range. Meanwhile, during the measurement process, only reactivate the counterweight block adjustment instruction when the deviation exceeds the threshold (such as ±2%).

2. The portable weight measuring device according to claim 1, wherein The folding tray (2) is rotatably arranged on the main scale body (1), and after the folding tray is opened, it forms a bearing surface with the top surface of the main scale body (1); Weight sensors (3) are respectively fixed on the main scale body (1) and the folding tray (2); Four counterweight assemblies (4) are respectively arranged on the main scale body (1) and the folding tray (2); The counterweight assembly (4) drives the counterweight block to move through a driving device to adjust the weighing value of the gravity sensor.

3. The portable weight measuring device according to claim 2, wherein, The driving device is a belt or chain conveying device.

4. The portable weight measuring device according to claim 2, characterized in that, The driving device includes a first motor (41) fixed on the main scale body (1); A rotating plate (42) is installed at the output end of the first motor (41); A moving groove (43) is formed on the rotating plate (42); A counterweight block (44) is slidably connected to the rotating plate (42); The counterweight block (44) moves within the range of the moving groove (43) driven by a second motor (45), and cooperates with the first motor (41) to adjust the counterweight block (44) to any position on the fan-shaped surface; A second motor (45) is installed inside the counterweight block (44); A gear (46) is installed at the output end of the second motor (45); The toothed plate (47) is installed on the rotating plate (42) and meshes with the surface of the gear (46); Two limiting rods (48) are oppositely arranged on both sides of the counterweight block (44); A sliding mechanism (49) is arranged on the counterweight block (44).

5. The portable weight measuring device according to claim 2, characterized in that, The counterweight block (44) is respectively connected to the main scale body (1) and the folding tray (2) through magnetic force mechanisms, enabling the counterweight assembly (4) to rotate within a (90)-degree angle range and enabling the counterweight block to move to any position within the fan-shaped area.

6. The portable weight measuring device according to claim 5, wherein, The magnetic force mechanism includes a magnetic suction plate (491) installed on the main scale body (1); A magnetic chuck (492) is installed on the counterweight block (44); Multiple rotating grooves (493) are formed on both the counterweight block (44) and the magnetic chuck (492); Multiple said balls (494) are respectively rotatably arranged in the corresponding rotating grooves (493).

7. The portable weight measuring device according to claim 6, wherein, The corresponding rotating grooves (493) wrap more than half of the corresponding balls (494).

8. The portable weight measuring device according to claim 6, wherein The balls (494) are connected to the counterweight block (44) through lubricating components (495), enabling the balls (494) to smoothly rotate within the counterweight block (44).

9. The portable body weight measuring device according to claim 8, characterized in that, The lubricating component (495) includes a storage groove (4951), a pushing spring (4952), a pressure block (4953), and a gasket (4954), wherein, the storage groove (4951) is formed inside the counterweight block (44), and the storage groove (4951) communicates with the rotating groove (493); one end of the pushing spring (4952) is connected to the storage groove (4951); the pressure block (4953) is arranged in the storage groove (4951), and the pressure block (4953) is connected to one end of the pushing spring (4952); the gasket (4954) is installed on the pressure block (4953).

10. The portable body weight measuring device according to claim 9, wherein, A locking rod is installed on the pressure block (4953), and the locking rod slides on the counterweight block (44).

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