Human body lower limb explosive power evaluation device

Abstract

The invention discloses a human body lower limb explosive power evaluation device, and relates to the technical field of physique testing, the human body lower limb explosive power evaluation device comprises a testing frame and a first assembly mounted on the testing frame, the first assembly comprises guide columns fixedly connected to four corners of the testing frame and used for limiting movement of a plurality of parts, and a baffle plate is slidably connected in the testing frame; through the arrangement of the first assembly and the second assembly, under the cooperation of parts such as a pedal plate, a guide column and a clamping block, the device adapts to the natural force exerting posture of a tester, compared with a traditional sitting posture or bending type testing device, the device is closer to the lower limb force exerting characteristics of actual motion scenes such as running and jumping, and measurement errors caused by uncomfortable postures are effectively avoided; meanwhile, the guide column and the clamping block are cooperatively matched, so that the assembly can be guided to move vertically, transverse force loss is reduced, it is ensured that pedaling and stretching force is accurately transmitted to a follow-up assembly, and torque, rotating speed and jumping height data better fit the real lower limb explosive force level of a tester.

Description

Technical Field

[0001] This invention relates to the field of physical fitness testing technology, specifically to a device for assessing the explosive power of the human lower limbs. Background Technology

[0002] Lower limb explosive power, as a key indicator of core human motor function, has irreplaceable application value in sports training, rehabilitation assessment, and physical fitness monitoring. In sports training, accurate lower limb explosive power data is the core basis for optimizing athletes' training programs and improving their performance in specific sports. In rehabilitation assessment, dynamic changes in lower limb explosive power are needed to judge the progress of patients' motor function recovery, ensuring the safety and relevance of rehabilitation plans. In the field of physical fitness monitoring, lower limb explosive power is also an important parameter for assessing the athletic ability of people of different ages and for early warning of sports injury risks. Therefore, developing a lower limb explosive power assessment device that conforms to the body's natural force exertion patterns and enables simultaneous acquisition of multi-dimensional parameters has become an important direction to meet the practical needs of related fields. While existing lower limb explosive power assessment devices on the market can measure some parameters, they still have significant shortcomings in terms of structural design, parameter acquisition dimensions, and data feedback, making it difficult to meet the assessment requirements of "accuracy, comprehensiveness, and convenience." Specific problems are reflected in the following three aspects: First, the force application modes of existing equipment are poorly adapted to the natural human movement posture, limiting the reference value of the measurement data. Most pedal-type explosive force testing devices require the tester to adopt a seated or bent-over posture to apply force, which differs significantly from the natural force application mode of "both feet upright pushing off the ground to jump upwards" in daily human movement. This makes it impossible to realistically simulate the lower limb force application characteristics in sports such as running and jumping, resulting in a disconnect between the measured parameters such as push-off force and speed and the actual lower limb explosive force performance in sports scenarios, making it difficult to accurately reflect the tester's true athletic ability. At the same time, the foot pedal height and force-bearing component positions of these devices are mostly fixed structures, which cannot be adjusted according to individual differences such as the tester's height and leg length. This can easily lead to decreased force application stability due to uncomfortable testing posture, further increasing measurement errors. Secondly, the assessment dimensions are limited, failing to achieve simultaneous acquisition of multiple parameters from force to velocity to displacement. Existing equipment either indirectly assesses explosive power only through jump height, such as standing long jump testing devices, which cannot quantify the peak force output and velocity changes at the moment of push-off; or it calculates power only through push-off force and rotational speed, such as some transmission-type training devices, lacking the acquisition of displacement parameters during the human jump. However, the essence of lower limb explosive power is the result of the synergistic effect of force to velocity to displacement. Single-dimensional parameter measurement cannot comprehensively reflect the dynamic characteristics of the test subject's lower limb explosive power, resulting in insufficient targeting of subsequent data-based training or rehabilitation programs and an inability to accurately locate the test subject's weak points in force exertion.

[0003] Therefore, this invention proposes a device for assessing the explosive power of the human lower limbs to solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for assessing the explosive power of the human lower limbs, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a human lower limb explosive power assessment device, comprising: a test frame and a first component mounted thereon, the first component comprising: guide posts fixedly connected to the four corners of the test frame for limiting the movement of multiple components, and a baffle plate slidably connected inside the test frame; The first component also includes: a shock-absorbing pad fixedly connected to the end of the shield away from the test frame; a foot pedal fixedly connected to the side of the shock-absorbing pad away from the shield; an anti-slip pad glued to the side of the foot pedal away from the shock-absorbing pad; snap-fit ​​blocks fixedly connected to the four corners of the foot pedal; and three auxiliary springs fixedly connected inside the test frame, the three auxiliary springs being evenly arranged inside the test frame; the ends of the auxiliary springs away from the test frame being fixedly connected to the shock-absorbing pad and the foot pedal. The second component is used to transmit and convert the force generated by the first component during the detection process into rotational motion that is easy to measure.

[0006] Preferably, four guide posts are provided and located at the four corners of the test frame, and the snap-fit ​​block is a three-quarter arc body, which is slidably snapped onto the outer ring of the guide post.

[0007] Preferably, the second component includes: a guide groove formed on the vertical surface of the test frame, the guide groove being a T-shaped groove, a rack slidably connected in the guide groove, one end of the rack being fixedly connected to a shock-absorbing pad, a gear meshing with one side of the rack, bearing seats being provided on both sides of the gear and rotatably connected to the bearings on both sides of the gear, and a torque sensor being fixedly connected to the bearing on one side of the gear. The third component is used to measure jump height to assess lower limb explosive power.

[0008] Preferably, a driven wheel is fixedly connected to the end of the gear away from the torque sensor, and a pointer input shaft of a pointer-type tachometer is fixedly connected to the end of the driven wheel away from the gear. A bracket is provided below the pointer-type tachometer, and the bracket is fixedly connected to the test frame. The pointer-type tachometer is fixedly connected to the test frame through the bracket.

[0009] Preferably, the torque sensor consists of a fixed shaft and an input shaft. The fixed shaft is connected to a motor, and the input shaft is fixedly connected to the bearing of a gear. Both the torque sensor and the pointer-type tachometer are connected to an external data processing module.

[0010] Preferably, the third component includes: a scale fixedly connected to both sides of the test frame, a sliding column fixedly connected to both sides of the test frame, one end of the sliding column being fixedly connected to a guide column, a counterweight being slidably sleeved on the outer ring of the sliding column, the counterweight being a cylindrical tube, an active column fixedly connected above the counterweight, a hook body fixedly connected to one side of the active column, the hook body being an arc-shaped hook, a connecting body fixedly connected to the outer ring of the hook body, and a push handle fixedly connected to the middle of the connecting body, the push handle being cylindrical.

[0011] Preferably, the test frame is fixedly connected to both sides of the device housing, and the device housing is vertically opened with multiple grooves on the side near the test frame. The multiple grooves consist of multiple horizontal grooves and one vertical groove. A control column is slidably connected in the multiple grooves, and a control rod is fixedly connected to the end of the control column away from the device housing. The inner wall of the test frame is provided with a through groove.

[0012] Preferably, the control rod is inverted L-shaped and a control handle is fixedly connected to the end away from the control post. The through groove is connected to the multi-section groove. The control rod is set in the through groove, and the control handle on it is slidably connected to the other side of the test frame through the through groove.

[0013] Preferably, a limiting plate is rotatably connected inside the housing of the device. A sliding groove is provided on the side of the limiting plate near the multi-section groove. A snap-fit ​​plate is rotatably connected above the limiting plate. The end of the snap-fit ​​plate away from the limiting plate is an arc surface. The sliding groove is arranged parallel to the transverse groove in the multi-section groove. The end of the control column away from the control rod is slidably connected in the sliding groove.

[0014] Compared with the prior art, the present invention provides a device for assessing the explosive power of the human lower limbs, which has the following beneficial effects: 1. Through the design of the first and second components, and with the cooperation of components such as the foot pedal, guide post, and locking block, the device adapts to the tester's natural force exertion posture. Compared with traditional seated or bent-over testing devices, it is closer to the lower limb force exertion characteristics of actual sports scenarios such as running and jumping, effectively avoiding measurement errors caused by posture discomfort. At the same time, the coordinated cooperation of the guide post and locking block can guide the vertical movement of the components, reduce lateral force loss, and ensure that the push-off force is accurately transmitted to the subsequent components, making the torque, speed, and jump height data more consistent with the tester's actual lower limb explosive power level.

[0015] 2. Through the transmission setup of rack and pinion, data parameters from the torque sensor and pointer tachometer are collected synchronously. Combined with the jump height measurement of the third component, a three-dimensional evaluation system is constructed, breaking through the limitations of single-parameter measurement in traditional equipment. Furthermore, both the torque sensor and the pointer tachometer are connected to the data processing module, which can calculate the lower limb explosive force value in real time. At the same time, in conjunction with the jump height data, it comprehensively reflects the dynamic characteristics of the test subject's lower limb explosive force, providing multi-dimensional data support for lower limb explosive force assessment and facilitating the accurate location of weak points in force exertion.

[0016] 3. The third component ensures that the test subject stands upright with their center of gravity directly above their feet, avoiding the risk of ankle sprains for shorter individuals when standing on tiptoe to exert force, and the risk of falls due to forward leaning of the upper body for taller individuals. Furthermore, the one-way limiting structure of the hook and locking plate can stably hold the counterweight at different initial heights. With the cooperation of the hook and multiple locking plates, it can accommodate test subjects of different heights, allowing them to push the handle normally within the height range. This avoids the problem of force loss caused by forced posture adjustments due to height incompatibility, ensuring that jump height measurement data accurately reflects the true level of lower limb explosive power and reducing systematic errors caused by individual differences.

[0017] 4. By setting the shape of the push handle to correspond to the position of the tester's thumb and forefinger, and by optimizing the point of force application and the shape of the contact surface, the tester is ensured to have accurate force direction, lossless force transmission, and consistent operational stability during the upward push. The cylindrical push handle's curved surface can form a displacement and stable contact point with the thumb and forefinger's position. When the tester pushes upward with their palm, the upward explosive force converted from the lower limb extension can be accurately applied to the axis of the push handle through the thumb and forefinger's position, ensuring that the direction of the force is vertically upward. Compared to rectangular or other planar shapes, where the contact point is prone to offset, causing some force to be dispersed laterally along the plane and forming ineffective component forces that cannot be converted into effective upward force, this shape setting ensures that the measured jump height is consistent with the height corresponding to the actual explosive force, reducing data errors. It is superior in that it ensures consistency of force application across different testers and multiple tests by the same tester, reducing the impact of individual operational differences. Regardless of the tester's hand size or the width of their thumb, the cylindrical push handle can adaptively fit the core force application area of ​​the thumb through its arc surface, ensuring that the force application point of each person is concentrated on the axis of the push handle. This avoids the problem of different contact positions and force application angles of the planar push handle due to differences in hand shape. When the tester pushes upwards multiple times, the cylindrical structure can also stably limit the relative position of the hand and the push handle, preventing the force application point from changing due to slight hand slippage. This ensures that the force transmission path remains consistent in each test, making the jump height data measured multiple times more comparable and reducing evaluation bias introduced by operational variables. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a disassembled structural diagram of the first component of the present invention; Figure 4 This is a structural diagram of the second component of the present invention; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 This is a structural diagram of the third component of the present invention; Figure 7 This is a disassembled structural diagram of the third component of the present invention; Figure 8 This is a partial structural diagram of the third component of the present invention; Figure 9 This is another state structure diagram of the third component of the present invention; Figure 10 This is a partial disassembly diagram of the present invention.

[0019] In the picture: 1. Testing framework; First Component 21. Guide post; 22. Baffle plate; 23. Shock-absorbing pad; 24. Foot pedal; 25. Clip-on block; 26. Anti-slip pad; 27. Auxiliary spring; Second component 31. Guide groove; 32. Rack; 33. Gear; 34. Bearing housing; 35. Torque sensor; 36. Driven wheel; 37. Pointer-type tachometer; 38. Bracket; Third Component 41. Scale; 42. Sliding column; 43. Counterweight; 44. Driving column; 45. Hook; 46. Connecting body; 47. Push handle; 48. Device housing; 49. Multi-section groove; 410. Control column; 411. Control rod; 412. Through groove; 413. Limiting plate; 414. Sliding groove; 415. Snap-fit ​​plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Example Please refer to Figures 1 to 5 As shown: To address the problems mentioned in the technical solutions, this application provides a human lower limb explosive power assessment device, including: a test frame 1 and a first component mounted thereon. The first component includes: guide posts 21 fixedly connected to the four corners of the test frame 1 for limiting the movement of multiple components, and a baffle plate 22 slidably connected inside the test frame 1. The first component also includes: a shock-absorbing pad 23 fixedly connected to the end of the shield 22 away from the test frame 1; a foot pedal 24 fixedly connected to the side of the shock-absorbing pad 23 away from the shield 22; an anti-slip pad 26 glued to the side of the foot pedal 24 away from the shock-absorbing pad 23; a snap-fit ​​block 25 fixedly connected to each of the four corners of the foot pedal 24; and three auxiliary springs 27 fixedly connected inside the test frame 1. The three auxiliary springs 27 are evenly arranged inside the test frame 1, and the end of the auxiliary spring 27 away from the test frame 1 is fixedly connected to the shock-absorbing pad 23 and the foot pedal 24. The second component is used to transmit and convert the force generated by the first component during the detection process into rotational motion that is easy to measure.

[0023] Four guide pillars 21 are provided and are located at the four corners of the test frame 1. The snap-fit ​​block 25 is a three-quarter arc and is slidably snapped onto the outer ring of the guide pillar 21.

[0024] The second component includes: a guide groove 31 formed on the vertical surface of the test frame 1. The guide groove 31 is a T-shaped groove. A rack 32 is slidably connected in the guide groove 31. One end of the rack 32 is fixedly connected to the shock-absorbing pad 23. A gear 33 is meshed with one side of the rack 32. The gear 33 is used to convert the vertical explosive force into rotational force. Bearing seats 34 are provided on both sides of the gear 33 and are rotatably connected to the bearings on both sides of the gear 33. A torque sensor 35 is fixedly connected to the bearing on one side of the gear 33. The torque sensor 35 is used to convert the rotational torque signal into an electrical signal and transmit it to the data processing module to provide feedback on the tester's lower limb extension explosive force. The third component is used to measure jump height to assess lower limb explosive power.

[0025] A driven wheel 36 is fixedly connected to the end of gear 33 away from torque sensor 35. The pointer input shaft of pointer tachometer 37 is fixedly connected to the end of driven wheel 36 away from gear 33. Pointer tachometer 37 is used to rotate and deflect feedback on the speed of the tester's lower limb extension force. A bracket 38 is set below pointer tachometer 37. The bracket 38 is fixedly connected to test frame 1. Pointer tachometer 37 is fixedly connected to test frame 1 through bracket 38. Driven wheel 36 is used to transmit component force to pointer tachometer 37.

[0026] The torque sensor 35 consists of a fixed shaft and an input shaft. The fixed shaft is connected to a motor, and the input shaft is fixedly connected to the bearing of the gear 33. Both the torque sensor 35 and the pointer-type tachometer 37 are connected to an external data processing module.

[0027] A further embodiment: Please refer to Figures 6 to 10 As shown: The third component includes: a scale 41 fixedly connected to both sides of the test frame 1, the scale 41 being used to visualize the moving height of the push handle 47; a sliding column 42 fixedly connected to both sides of the test frame 1, one end of the sliding column 42 being fixedly connected to the guide column 21; a counterweight 43 slidingly sleeved on the outer ring of the sliding column 42, the counterweight 43 being a cylindrical tube; an active column 44 fixedly connected above the counterweight 43; a hook 45 fixedly connected to one side of the active column 44, the hook 45 being an arc-shaped hook; a connecting body 46 fixedly connected to the outer ring of the hook 45; and a push handle 47 fixedly connected to the middle of the connecting body 46, the push handle 47 being cylindrical; and the push handle 47 corresponding to the same point as the tiger's mouth of the tester's palm.

[0028] The test frame 1 is fixedly connected to the two sides of the device housing 48. The device housing 48 has a multi-slot 49 vertically opened on the side closer to the test frame 1. The multi-slot 49 consists of multiple horizontal slots and a vertical slot. A control column 410 is slidably connected in the multi-slot 49. The control column 410 is used to slide and control the deflection of the limit plate 413 in the slide groove 414. A control rod 411 is fixedly connected to the end of the control column 410 away from the device housing 48. The control rod 411 is used to control the movement of the control column 410 in the multi-slot 49. A through slot 412 is opened on the inner wall of the test frame 1.

[0029] The control rod 411 is an inverted L-shape and a control handle is fixedly connected to the end away from the control post 410. The through groove 412 is connected to the multi-section groove 49. The control rod 411 is set in the through groove 412 and the control handle on it slides through the through groove 412 and is slidably connected to the other side of the test frame 1.

[0030] A limiting plate 413 is rotatably connected inside the housing 48 of the device. The limiting plate 413 is used to limit the movement of the snap-fit ​​plate 415. A sliding groove 414 is provided on the side of the limiting plate 413 near the multi-section groove 49. The snap-fit ​​plate 415 is rotatably connected above the limiting plate 413. The snap-fit ​​plate 415 is used to unidirectionally limit the movement of the hook body 45. The end of the snap-fit ​​plate 415 away from the limiting plate 413 is an arc surface. The sliding groove 414 is arranged parallel to the transverse groove in the multi-section groove 49. The end of the control column 410 away from the control rod 411 is slidably connected in the sliding groove 414.

[0031] The working principle of all the content in the above embodiments is as follows: The working process of the first and second components is as follows: During use, the tester stands on the foot pedal 24 with both feet. The anti-slip pad 26 increases the friction between the feet and the foot pedal 24, preventing slippage when exerting force. When the tester issues the test command and pushes off with their lower limbs, the pushing force acts on the foot pedal 24 and is transmitted to the shock-absorbing pad 23 at the bottom of the foot pedal 24. The shock-absorbing pad 23 buffers the impact force generated at the moment of pushing off, reducing force loss and device vibration. Subsequently, the pushing force is further transmitted to the baffle plate 22, pushing the baffle plate 22 to slide downwards along the inside of the test frame 1. At the same time, the foot pedal... The locking blocks 25 around the plate 24 slide vertically downward along the outer ring of the guide post 21. Under the restriction of the locking blocks 25 by the four guide posts 21, the auxiliary foot pedal 24 slides down stably and avoids deviation. In addition, the auxiliary springs 27 evenly arranged in the test frame 1, when the foot pedal 24 slides down, the downward pressure of the foot pedal 24 is transmitted to the shock-absorbing pad 23, causing the auxiliary springs 27 to be compressed, storing elastic potential energy, and stabilizing the movement of the auxiliary foot pedal 24 and other components, ensuring the vertical transmission of force. At the same time, the auxiliary components are reset after the subsequent test is completed. Furthermore, as the foot pedal 24 moves vertically downward, the rack 32, which is fixedly connected to the foot pedal 24, slides downward synchronously along the guide groove 31 opened on the vertical surface of the test frame 1. Due to the meshing transmission between the rack 32 and the gear 33, the linear motion of the rack 32 in the vertical direction drives the gear 33 to rotate, converting the vertical burst force into rotational force. The gear 33 is rotatably connected to the bearing housing 34 through the bearings on both sides, and assists in the rotational stability of the bearing housing 34, ensuring the coaxiality of the gear 33 during rotation and avoiding loss of force transmission due to misalignment. When the gear 33 rotates, since one of its bearings is fixedly connected to the input shaft of the torque sensor 35, the torque generated by the rotation of the gear 33 acts on the torque sensor 35. The fixed shaft of the torque sensor 35 is connected to the motor, assisting the torque sensor. The stable rotation of the input shaft 35 allows the internal structure of the torque sensor 35 to convert the rotational torque signal into an electrical signal, which is then transmitted to the external data processing module to provide torque data for calculating the explosive force of the lower limbs' push-off. Simultaneously, on the other side of the gear 33, the bearing is connected to the pointer input shaft of the pointer-type tachometer 37 via the driven wheel 36. The rotation of the gear 33 drives the driven wheel 36 to rotate synchronously, and the driven wheel 36 transmits the rotational force to the input shaft of the pointer-type tachometer 37, driving the pointer of the pointer-type tachometer 37 to deflect. Since the pointer-type tachometer 37 is connected to the data processing module, the speed signal of this pointer is synchronously transmitted to the data processing module, and the explosive force is calculated in conjunction with the torque signal. The bracket 38 provides support and fixation for the pointer-type tachometer 37, ensuring the stability of the speed measurement. By setting up the first and second components, and with the cooperation of components such as the foot pedal 24, guide post 21, and locking block 25, the device adapts to the tester's natural force exertion posture. Compared with traditional seated or bent-over testing devices, it is closer to the lower limb force exertion characteristics of actual sports scenarios such as running and jumping, effectively avoiding measurement errors caused by posture discomfort. At the same time, the coordinated cooperation of the guide post 21 and the locking block 25 can guide the vertical movement of the components, reduce lateral force loss, and ensure that the push-off force is accurately transmitted to the subsequent components, so that the torque, speed, and jump height data are more in line with the tester's actual lower limb explosive power level.

[0032] Through the transmission setup of rack 32 and gear 33, data parameters from torque sensor 35 and pointer tachometer 37 are collected synchronously. Combined with the jump height measurement of the third component, a three-dimensional evaluation system is constructed, breaking through the limitations of single-parameter measurement in traditional equipment. Furthermore, both torque sensor 35 and pointer tachometer 37 are connected to the data processing module, which can calculate the lower limb explosive force value in real time. At the same time, in conjunction with the jump height data, it comprehensively reflects the dynamic characteristics of the test subject's lower limb explosive force, providing multi-dimensional data support for lower limb explosive force assessment and facilitating the accurate location of weak points in force exertion.

[0033] Please refer to the above work process. Figures 1 to 5 .

[0034] The following is the working process of the third component: During use, the tester jumps upwards while pushing off the foot pedal 24 with their lower limbs. The position of their thumb and forefinger corresponds to the arc surface of the push handle 47, pushing the push handle 47 upwards. The push handle 47 is connected to the hook body 45 through the connector 46, which in turn causes the hook body 45, the active column 44, and the counterweight 43 to slide vertically upwards along the sliding column 42. During the upward movement of the counterweight 43, the upper arc surface of the hook body 45 contacts the locking plate 415 inside the device housing 48. Because the side of the locking plate 415 away from the limiting plate 413 is... The curved surface of the hook 45 rises and its curved surface abuts against the locking plate 415. It deflects in the opposite direction with the connection of the limiting plate 413 as the axis, thereby avoiding the locking plate 415 from restricting the movement of the hook 45. After the counterweight 43 rises to the highest point by the push of the tester, the locking plate 415 resets under its own gravity, forming a one-way limit on the hook 45 to prevent the counterweight 43 from falling. At this time, the operator can read the corresponding height of the counterweight 43, i.e. the jump height of the tester, through the scale 41 on both sides of the test frame 1. If a reset is required, the operator pushes the control handle of the control rod 411 on the reverse side of the test frame 1, causing the control handle to slide from right to left along the through groove 412. This causes the control column 410, which is fixedly connected to the control rod 411, to slide within the multi-section groove 49 and the slide groove 414 of the limiting plate 413. When the control column 410 moves to the vertical groove position of the multi-section groove 49, the operator pulls down the control rod 411, causing the limiting plate 413 to deflect downwards around the connection point of the device housing 48. This causes the limiting plate 413 to contact the limiting plate 415, thereby contacting the limiting plate 415 to restrict the hook body 45. This causes the counterweight 43 to fall down along the slide column 42 to reset, completing one jump height measurement.

[0035] By setting up the third component, it is ensured that the test subject stands upright with a stable center of gravity directly above both feet, avoiding the risk of ankle sprains for shorter individuals when standing on tiptoe to exert force, and the risk of falls due to forward leaning of the upper body for taller individuals. Furthermore, the one-way limiting structure of the hook 45 and the locking plate 415 can stably lock the counterweight 43 at different initial heights. With the cooperation of the hook 45 and multiple locking plates 415, it can adapt to test subjects of different heights, allowing them to push the push handle 47 normally within the height range. This avoids the problem of force loss caused by forced posture adjustments due to height incompatibility, ensuring that the jump height measurement data accurately reflects the true level of lower limb explosive power and reducing systematic errors caused by individual differences.

[0036] By setting the shape of the push handle 47 to correspond to the position of the tester's thumb and forefinger, and by optimizing the point of force application and the shape of the contact surface, the tester is ensured to have accurate force direction, lossless force transmission, and consistent operational stability during the upward push. The cylindrical push handle 47, with its curved surface, can form a displacement and stable contact point with the thumb and forefinger. When the tester pushes upward with their palm, the upward explosive force converted from the lower limb extension can be accurately applied to the axis of the push handle 47 through the thumb and forefinger, ensuring that the direction of the force is vertically upward. Compared with the contact point of planar shapes such as rectangles, which are prone to displacement, causing some force to be dispersed laterally along the plane and forming ineffective component force that cannot be converted into effective upward force, this shape setting ensures that the measured jump height is consistent with the height corresponding to the actual explosive force, reducing data errors. It is superior in that it ensures the consistency of force application across different testers and multiple tests by the same tester, reducing the impact of individual operational differences. Regardless of the tester's hand size or the width of their thumb, the cylindrical push handle 47 can adaptively fit the core force application area of ​​the thumb through its arc surface, ensuring that the force application point of each person is concentrated on the push handle axis. This avoids the problem of different contact positions and force application angles of the planar push handle due to differences in hand shape. When the tester pushes upwards multiple times, the cylindrical structure can also stably limit the relative position of the hand and the push handle 47, preventing the change of the force application point due to slight hand slippage. This ensures that the force transmission path remains consistent in each test, making the jump height data measured multiple times more comparable and reducing the evaluation bias introduced by operational variables.

[0037] Please refer to the above work process. Figures 6 to 10 .

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for assessing the explosive power of the human lower limbs, comprising: The test frame (1) and the first component mounted thereon are characterized in that: the first component includes: guide posts (21) fixedly connected to the four corners of the test frame (1) for limiting the movement of multiple components, and a baffle plate (22) is slidably connected inside the test frame (1). The first component also includes: a shock-absorbing pad (23) fixedly connected to the end of the shield (22) away from the test frame (1), a foot pedal (24) fixedly connected to the side of the shock-absorbing pad (23) away from the shield (22), an anti-slip pad (26) glued to the side of the foot pedal (24) away from the shock-absorbing pad (23), and snap-fit ​​blocks (25) fixedly connected to the four corners of the foot pedal (24). Three auxiliary springs (27) are fixedly connected inside the test frame (1), and the three auxiliary springs (27) are evenly arranged inside the test frame (1). The end of the auxiliary spring (27) away from the test frame (1) is fixedly connected to the shock-absorbing pad (23) and the foot pedal (24). The second component is used to transmit and convert the force generated by the first component during the detection process into rotational motion that is easy to measure.

2. The human lower limb explosive power assessment device according to claim 1, characterized in that: The guide post (21) is provided in four parts and is located at the four corners of the test frame (1). The snap-fit ​​block (25) is a three-quarter arc and is slidably snapped onto the outer ring of the guide post (21).

3. The human lower limb explosive power assessment device according to claim 1, characterized in that: The second component includes: a guide groove (31) opened on the vertical surface of the test frame (1), the guide groove (31) is a T-shaped groove, a rack (32) is slidably connected in the guide groove (31), one end of the rack (32) is fixedly connected to the shock-absorbing pad (23), a gear (33) is meshed on one side of the rack (32), bearing seats (34) are provided on both sides of the gear (33) and are rotatably connected to the bearings on both sides of the gear (33), and a torque sensor (35) is fixedly connected to the bearing on one side of the gear (33). The third component is used to measure jump height to assess lower limb explosive power.

4. The human lower limb explosive power assessment device according to claim 3, characterized in that: The gear (33) is fixedly connected to a driven wheel (36) at the end away from the torque sensor (35). The driven wheel (36) is fixedly connected to the pointer input shaft of a pointer-type tachometer (37) at the end away from the gear (33). A bracket (38) is provided below the pointer-type tachometer (37). The bracket (38) is fixedly connected to the test frame (1). The pointer-type tachometer (37) is fixedly connected to the test frame (1) through the bracket (38).

5. The human lower limb explosive power assessment device according to claim 3, characterized in that: The torque sensor (35) consists of a fixed shaft and an input shaft. The fixed shaft is connected to a motor, and the input shaft is fixedly connected to the bearing of the gear (33). Both the torque sensor (35) and the pointer-type tachometer (37) are connected to an external data processing module.

6. The human lower limb explosive power assessment device according to claim 3, characterized in that: The third component includes: a scale (41) fixedly connected to both sides of the test frame (1), a sliding column (42) fixedly connected to both sides of the test frame (1), one end of the sliding column (42) fixedly connected to the guide column (21), a counterweight (43) slidably sleeved on the outer ring of the sliding column (42), the counterweight (43) being a cylindrical tube, an active column (44) fixedly connected above the counterweight (43), a hook (45) fixedly connected to one side of the active column (44), the hook (45) being an arc-shaped hook, a connecting body (46) fixedly connected to the outer ring of the hook (45), and a push handle (47) fixedly connected to the middle of the connecting body (46), the push handle (47) being cylindrical.

7. The human lower limb explosive power assessment device according to claim 6, characterized in that: The test frame (1) is fixedly connected to the two sides of the device housing (48). The device housing (48) has a multi-slot (49) vertically opened on the side of the test frame (1). The multi-slot (49) consists of a multi-horizontal slot and a vertical slot. A control column (410) is slidably connected in the multi-slot (49). A control rod (411) is fixedly connected to the end of the control column (410) away from the device housing (48). A through slot (412) is opened on the inner wall of the test frame (1).

8. The human lower limb explosive power assessment device according to claim 7, characterized in that: The control rod (411) is an inverted L-shape and a control handle is fixedly connected to one end away from the control post (410). The through groove (412) is connected to the multi-section groove (49). The control rod (411) is set in the through groove (412) and the control handle on it slides through the through groove (412) and is slidably connected to the other side of the test frame (1).

9. A device for assessing the explosive power of the human lower limbs according to claim 7, characterized in that: A limiting plate (413) is rotatably connected inside the housing (48) of the device. A sliding groove (414) is provided on the side of the limiting plate (413) near the multi-section groove (49). A snap-fit ​​plate (415) is rotatably connected above the limiting plate (413). The end of the snap-fit ​​plate (415) away from the limiting plate (413) is an arc surface. The sliding groove (414) is parallel to the transverse groove in the multi-section groove (49). The end of the control column (410) away from the control rod (411) is slidably connected in the sliding groove (414).

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