A sitting body forward bending measuring device

Abstract

A kind of sitting body forward bending measuring equipment, including bottom plate, further including mobile footboard assembly, installation in the top surface of bottom plate one side, mobile footboard assembly is movable structure, to adapt to the body shape of different measurers;Measuring assembly, installation in the top of mobile footboard assembly, to measure the distance that the tip of the finger of measurer pushes forward;Reset component, installation in the rear side of measuring assembly, after each measurement, the measuring end of measuring assembly is pushed back to original position;Cheating monitoring component, installation in the top surface of bottom plate, to monitor multiple parts of the body of measurer, prevent measurer from making illegal cheating when measuring in order to tip push longer distance;The application has strong adaptability, and measurement accuracy is high;By setting mobile footboard assembly, make mobile footboard board can be forward and backward electrically adjusted according to the leg length of measurer, ensure that each measurer can be in standard, comfortable starting posture, eliminate the measurement error caused by sitting distance, without measurer adjusting sitting posture, improve the accuracy and fairness of test.

Description

Technical Field

[0001] This invention relates to a measuring device, and more particularly to a seated forward flexion measuring device. Background Technology

[0002] The sit-and-reach test is an important indicator of human flexibility and is widely used in school physical education tests, national physical fitness monitoring, and the selection of professional athletes. The test requires the test taker to sit on the ground with legs straight and heels together against a foot pedal. Then, the test taker bends forward, pushing the measuring scale forward as far as possible with their fingertips. The maximum distance pushed is taken as the test score.

[0003] Most sit-and-reach measurement devices on the market are simple mechanical types, which present several problems in actual testing. The foot pedal position is fixed, typically fixed to the base plate. However, there are significant differences in height and leg length among participants. The fixed foot pedal position forces participants to adjust their posture during preparation, resulting in a measured distance being less than the actual extension distance if they sit too far away (too far toes touching the foot pedal), or a measured distance being greater than the actual extension distance if they sit too close (causing knee flexion). Both situations directly affect the accuracy and fairness of the test results.

[0004] To address the aforementioned issues, we provide a sit-and-reach measurement device to meet the usage requirements. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a seated forward flexion measurement device.

[0006] The objective of this invention is achieved as follows:

[0007] A sit-and-reach measurement device includes a base plate and a movable foot pedal assembly installed on one side of the top surface of the base plate. The movable foot pedal assembly is a movable structure to adapt to different body types of the person being measured.

[0008] A measuring component, mounted on top of the movable foot pedal assembly, measures the distance a user pushes forward with their fingertips;

[0009] A return component, installed on the rear side of the measuring component, pushes the measuring end of the measuring component back to its original position after each measurement;

[0010] A cheating detection component is installed on the top surface of the base plate to monitor multiple parts of the measurer's body and prevent the measurer from cheating by pushing their fingertips a longer distance during the measurement.

[0011] Furthermore, each corner of the base plate is provided with a support leg, and the bottom surface of the support leg is provided with a friction pad.

[0012] Furthermore, the movable foot pedal assembly includes a movable slide rail, a movable slide base, a movable foot pedal, a rear extension plate, a rear mounting plate, and a foot pedal push rod. A pair of movable slide rails are provided on the top surface of the base plate along its length. Movable slide bases are slidably connected to the top surfaces of the movable slide rails. Rear extension plates are provided on the top surfaces of the two movable slide bases. A movable foot pedal is provided at the front end of the rear extension plate. A groove adapted to the movable slide base is opened through the bottom of the movable foot pedal. One end of the movable slide base passes through the groove, and its end face extends to be flush with the side of the movable foot pedal away from the rear extension plate. A rear mounting plate is provided at one end of the top surface of the base plate. A foot pedal push rod is installed on the side of the rear mounting plate facing the movable foot pedal. The output end of the foot pedal push rod is fixedly connected to the movable foot pedal.

[0013] Furthermore, a telescopic groove is provided on the side of the movable foot pedal away from the rear extension plate, and a foot pedal sensor is installed in the telescopic groove. The detection end of the foot pedal sensor is provided with a foot pedal contact plate.

[0014] Furthermore, the measuring assembly includes a measuring ruler, a measuring slide, a measuring push plate, a supporting base plate, and a triangular bracket. The measuring ruler is mounted on the top surface of the movable foot pedal, and the supporting base plate is mounted on the bottom surface of the rear end of the measuring ruler. A pair of triangular brackets are mounted between the supporting base plate and the rear extension plate. The measuring slide is slidably connected to the top of the measuring ruler, and the measuring push plate is mounted on the top of the measuring slide.

[0015] Furthermore, the measuring ruler has equally spaced scale protrusions on the lower parts of both sides.

[0016] Furthermore, a measuring mounting plate is provided at the rear end of the measuring ruler, and a distance sensor is installed on the side of the measuring mounting plate facing the measuring push plate to detect the moving distance of the measuring push plate.

[0017] Furthermore, the measuring slide includes a measuring slider, a connecting top plate, a connecting vertical plate, and connecting diagonal braces. Two measuring sliders are slidably connected to the top surface of the measuring ruler. A connecting top plate is provided on the top surface of the two measuring sliders. A pair of connecting diagonal braces are provided on each side of the connecting top plate. The two connecting diagonal braces on the same side face outward from the middle of the connecting top plate and are fixedly connected to both sides of the connecting vertical plate. Connecting diagonal braces are provided between the lower parts of both sides of the connecting vertical plate and the measuring sliders. The measuring push plate is provided on the top of the two connecting vertical plates.

[0018] Furthermore, locking elements are installed on both sides of the measuring slide.

[0019] Furthermore, the locking component includes a sliding sleeve, a locking rod, a locking pull plate, a locking spring, and a plug-in rod. The sliding sleeve is slidably connected to the outer side of the connecting vertical plate. A plug-in rod is vertically arranged at one end of the inner side of the sliding sleeve. A plug-in groove adapted to the plug-in rod is opened on the top surface of the movable foot pedal. The plug-in rod is located directly above the plug-in groove. A locking rod is slidably connected through the other side of the sliding sleeve. A locking pull plate is arranged on the outer side of the locking rod. A plurality of locking springs are arranged between the locking pull plate and the sliding sleeve. A fixing hole adapted to the locking rod is opened on the outer side of the connecting vertical plate.

[0020] Furthermore, the return assembly includes a return vertical plate, a return top plate, a return push rod, and a return push plate. The return vertical plate is provided on the top surface of the support base plate, and the return top plate is provided at the top of the return vertical plate. The return push rod is installed on the side of the return top plate facing the measuring push plate, and the return push plate is provided at the output end of the return push rod.

[0021] Furthermore, the cheating detection component includes a knee flexion detector, a hip lift detector, and an alarm light. The knee flexion detector is installed on both sides of the base plate, the hip lift detector is installed on the side of the base plate away from the measuring component, and alarm lights are installed on both sides of the hip lift detector.

[0022] Furthermore, the knee flexion monitoring device includes a drive box, a drive screw, a drive slider, a drive motor, a drive frame, a longitudinal push rod, a lifting slider, a transverse push rod, a knee flexion plate, a thigh connecting rod, a thigh limiting plate, a lower leg telescopic rod, a lower leg telescopic screw, a lower leg telescopic handwheel, a lower leg limiting plate, and a distance sensor. Drive boxes are respectively provided on both sides of the base plate. The drive box has a hollow structure, and a drive groove is formed through its length on the top surface. A drive screw is rotatably connected to the inner cavity of the drive box along its length. A drive motor is installed on one side of the drive box, and the output shaft of the drive motor extends into the drive box and is fixedly connected to one end of the drive screw. A drive slider is threaded through the drive screw, and the bottom end of the drive slider is slidably connected to the bottom surface of the inner cavity of the drive box. The drive frame is L-shaped. One end of the long side is fixedly connected to the top surface of the drive slider through the drive groove. A longitudinal push rod is installed on the bottom surface of the L-shaped short side of the drive frame. A lifting slider is provided at the output end of the longitudinal push rod. One end of the lifting slider is slidably connected to the drive frame. A transverse push rod is installed at the other end of the lifting slider. A knee-bending plate is provided at the output end of the transverse push rod. A thigh connecting rod is provided at the rear end of the bottom surface of the knee-bending plate. A thigh limiting plate is provided at the lower end of the thigh connecting rod. A calf telescopic rod is provided at the front end of the bottom surface of the knee-bending plate. A calf telescopic screw is threaded through the knee-bending plate. The bottom end of the calf telescopic screw is rotatably connected to the top surface of the calf limiting plate. A calf telescopic handwheel is provided at the top end of the calf telescopic screw. A distance sensor is installed in the middle of the bottom surface of the knee-bending plate.

[0023] Furthermore, the hip-lifting monitoring device includes a seat plate, a monitoring strip, a pressure sensor, and an alarm light. The seat plate is L-shaped, and the top surface of the base plate has a mounting groove adapted to the seat plate. The seat plate is installed in the mounting groove, and the top surface of the seat plate has a monitoring groove. Several sets of pressure sensors are installed in the monitoring groove, and a monitoring strip is provided at the detection end of each set of pressure sensors. Alarm lights are provided on both sides of the seat plate.

[0024] Advantages of this invention:

[0025] 1. High adaptability and measurement accuracy. The movable foot pedal assembly allows for electric adjustment based on the user's leg length. Before measurement, the foot pedal can be moved via a foot pedal lever, ensuring the foot contact plate precisely aligns with the user's heel. This guarantees a standard, comfortable starting posture for each user, fundamentally eliminating measurement errors caused by differences in seating position. It eliminates the need for users to adjust their posture, improving the accuracy and fairness of the test.

[0026] 2. Automatic return to position, high testing efficiency. By setting up a return component, after a measurement is completed and data is recorded, the return push rod can automatically drive the return push plate to push the measuring push plate back to the zero or starting position of the measuring scale, without manual operation. This design achieves fast and accurate reset, and is especially suitable for large-scale, high-frequency testing scenarios, significantly improving testing efficiency.

[0027] 3. Comprehensive and effective cheating detection ensures reliable test results. For hip-raising cheating: A hip-raising detection device creates multiple pressure monitoring areas under the subject's buttocks. When the subject attempts to raise their hips, the contact pressure between the buttocks and the monitoring plates at different locations changes significantly in distribution and value. The pressure sensor captures this change in real time and triggers an alarm, effectively preventing cheating by artificially inflating distance through hip-raising. For knee-bending cheating: A knee-bending detection device allows adjustment of the thigh and calf limiting plates to optimal positions for subjects of different body types. During measurement, a distance sensor monitors knee raising and bending movements in real time, issuing an immediate warning upon detecting knee bending. This component provides three-dimensional and dynamic monitoring of the subject's leg posture, effectively preventing knee-bending cheating.

[0028] 4. The measuring slide in this design, through a combination of "double sliders + double-sided vertical plates + diagonal braces," significantly improves the stability and smoothness of the measuring push plate during the measurement process. The wide base structure formed by the double measuring sliders greatly increases the contact length between the slide and the guide rail. Even with eccentric fingertip pushing force, it effectively counteracts the eccentric load torque, preventing jamming or tilting caused by force. The connecting vertical plates on both sides of the top plate, along with multiple connecting diagonal braces, form a high-rigidity "π"-shaped frame, clamping the connecting vertical plates from the sides, enhancing torsional resistance, and preventing the measuring push plate from swaying left and right during sliding. This design ensures a clear and stable force transmission path, resulting in constant and minimal sliding resistance. The pushing process is linear and smooth without any jerking, completely eliminating additional resistance caused by mechanical jamming or shaking, ensuring the continuity of the measurement action, and thus making the measurement data more accurate and reliable. Attached Figure Description

[0029] Figure 1 A schematic diagram of a sit-and-reach measurement device Figure 1 .

[0030] Figure 2 A schematic diagram of a sit-and-reach measurement device Figure 2 .

[0031] Figure 3 This is a schematic diagram of a half-section structure of a seated forward flexion measuring device.

[0032] Figure 4 This is a schematic diagram of the structure of the moving foot pedal assembly and the measuring assembly.

[0033] Figure 5 This is an enlarged view of point A.

[0034] Figure 6 This is a cross-sectional view of the drive box.

[0035] Figure 7 This is a schematic diagram of the thigh limiting plate and the calf limiting plate.

[0036] Figure 8 This is a schematic diagram of the measuring slide structure.

[0037] In the picture:

[0038] 1. Base plate; 11. Support legs; 12. Friction pads;

[0039] 2. Movable foot pedal assembly; 21. Movable slide rail; 22. Movable slide block; 23. Movable foot pedal; 24. Rear extension plate; 25. Rear mounting plate; 251. Telescopic groove; 252. Foot pedal sensor; 253. Foot pedal contact plate; 26. Foot pedal push rod;

[0040] 3. Measuring components; 31. Measuring ruler; 32. Measuring slide; 321. Measuring slider; 322. Connecting top plate; 323. Connecting vertical plate; 324. Connecting diagonal brace; 33. Measuring push plate; 34. Supporting base plate; 35. Triangular bracket; 36. Measuring mounting plate; 37. Distance sensor; 38. Locking component; 381. Sliding sleeve; 382. Locking pull rod; 383. Locking pull plate; 384. Locking tension spring; 385. Connecting rod;

[0041] 4. Return component, 41. Return vertical plate, 42. Return top plate, 43. Return push rod, 44. Return push plate;

[0042] 5. Cheating detection components, 51. Knee flexion detection component, 5011. Drive box, 5012. Drive screw, 5013. Drive slider, 5014. Drive motor, 5015. Drive frame, 5016. Longitudinal push rod, 5017. Lifting slider, 5018. Lateral push rod, 5019. Knee flexion crossbar, 5020. Thigh linkage, 5021. Thigh limiting plate, 5022. Lower leg telescopic rod, 5023. Lower leg telescopic screw, 5024. Lower leg telescopic handwheel, 5025. Lower leg limiting plate, 5026. Knee sensor, 52. Hip lift detection component, 521. Seat plate, 522. Detection strip, 523. Pressure sensor, 53. Alarm light. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0044] This application provides a device for measuring sit-and-reach flexibility.

[0045] Example 1, as Figure 1-8 As shown.

[0046] A sit-and-reach measurement device includes a base plate 1, with support legs 11 at each corner of the base plate 1. Friction pads 12 are provided on the bottom surface of each support leg 11. The friction pads 12 increase the friction between the device and the ground, preventing the device from sliding during measurement and ensuring test safety and stability.

[0047] A seated forward flexion measuring device further includes a movable foot pedal assembly 2, which is installed on one side of the top surface of the base plate 1. The movable foot pedal assembly 2 is a movable structure to adapt to different body types of the measuring person.

[0048] The movable foot pedal assembly 2 includes a movable slide rail 21, a movable slide base 22, a movable foot pedal 23, a rear extension plate 24, a rear mounting plate 25, and a foot pedal push rod 26. A pair of movable slide rails 21 are provided on the top surface of the base plate 1 along its length. The movable slide base 22 is slidably connected to the top surface of the movable slide rails 21. The rear extension plate 24 is provided on the top surface of the two movable slide bases 22. The movable foot pedal 23 is provided at the front end of the rear extension plate 24. The bottom of the movable foot pedal 23 has a through groove that matches the movable slide base 22. One end of the movable slide base 22 passes through the groove, and its end face extends to be flush with the side of the movable foot pedal 23 away from the rear extension plate 24. The design of the movable slide base 22 can ensure that the movable slide base 22 supports the rear extension plate 24 and the movable foot pedal 23 along its entire length.

[0049] A rear mounting plate 25 is provided at one end of the top surface of the base plate 1. A foot pedal push rod 26 is mounted on the side of the rear mounting plate 25 facing the movable foot pedal 23. The output end of the foot pedal push rod 26 is fixedly connected to the movable foot pedal 23. The foot pedal push rod 26 is an electric push rod, and those skilled in the art can select the appropriate model.

[0050] The movable foot pedal 23 has a telescopic groove 251 on one side away from the rear extension plate 24. A foot pedal sensor 252 is installed in the telescopic groove 251, and a foot pedal contact plate 253 is provided at the detection end of the foot pedal sensor 252. The foot pedal sensor 252 is a pressure sensor 523, and its model can be selected by those skilled in the art.

[0051] In use, the person taking the measurement simply sits on the top surface of the base plate 1. The foot pedal push rod 26 moves the movable foot pedal 23 toward the person's feet. When the person's heel touches the foot pedal contact plate 253, the foot pedal sensor 252 automatically senses and feeds back a signal, ensuring that each person taking the measurement starts from the same standard starting posture, eliminating measurement errors caused by differences in the distance between the person and the foot pedal. The measurement does not require the person to adjust their posture, improving the accuracy and fairness of the test.

[0052] A seated forward flexion measuring device includes a measuring component 3, which is mounted on top of the movable foot pedal component 2, to measure the distance that the measurer's fingertips push forward;

[0053] The measuring assembly 3 includes a measuring ruler 31, a measuring slide 32, a measuring push plate 33, a supporting base plate 34, and a triangular bracket 35. The measuring ruler 31 is mounted on the top surface of the movable foot pedal 23. The supporting base plate 34 is mounted on the bottom surface of the rear end of the measuring ruler 31. A pair of triangular brackets 35 are positioned between the supporting base plate 34 and the rear extension plate 24. The measuring slide 32 is slidably connected to the top of the measuring ruler 31, and the measuring push plate 33 is mounted on the top of the measuring slide 32. The triangular brackets 35 enhance the structural rigidity of the rear end of the measuring ruler 31, preventing deformation of the measuring ruler 31 due to force during pushing and affecting measurement accuracy. They also prevent deformation of the measuring ruler 31 after prolonged use due to its length.

[0054] The measuring ruler 31 has equally spaced scale protrusions on both sides of its lower part, which allows for intuitive reading of the data generated during measurement.

[0055] A measuring mounting plate 36 is provided at the rear end of the measuring ruler 31. A distance sensor 37 is mounted on the side of the measuring mounting plate 36 facing the measuring push plate 33 to detect the moving distance of the measuring push plate 33. The distance sensor 37 can be selected by those skilled in the art. The moving distance of the measuring push rod can be directly measured through the distance sensor 37, thereby obtaining the length data pushed by the measurer. A display is mounted on the top surface of the measuring mounting plate 36 to display the length data pushed by the measurer measured by the distance sensor 37.

[0056] The measuring slide 32 includes a measuring slider 321, a connecting top plate 322, a connecting vertical plate 323, and a connecting diagonal brace 324. Two measuring sliders 321 are slidably connected to the top surface of the measuring ruler 31. The top surface of the two measuring sliders 321 is provided with a connecting top plate 322. A pair of connecting diagonal braces 324 are provided on both sides of the connecting top plate 322. The two connecting diagonal braces 324 on the same side face the outer side of the middle part of the connecting top plate 322 and are fixedly connected to both sides of the connecting vertical plate 323. The lower part of both sides of the connecting vertical plate 323 is provided with connecting diagonal braces 324 between it and the measuring slider 321. The measuring push plate 33 is provided on the top of the two connecting vertical plates 323.

[0057] The measuring slide 32 in this design significantly improves the stability and smoothness of the measuring push plate 33 during the measurement process through a combination design of "double sliders + double-sided vertical plates + diagonal braces". The wide base structure formed by the double measuring sliders 321 greatly increases the contact length between the slide and the guide rail, effectively offsetting the off-center load torque even with eccentric finger-push force, preventing jamming or tilting caused by force. The connecting vertical plates 323 on both sides of the top plate 322 and multiple connecting diagonal braces 324 form a high-rigidity "π"-shaped frame, clamping the connecting vertical plates 323 from the sides, enhancing torsional resistance and preventing the measuring push plate 33 from swaying left and right during sliding. This design ensures a clear and stable force transmission path, making the sliding resistance constant and minimal, and the pushing process linear and smooth without any jerking, thus completely eliminating additional resistance caused by mechanical jamming or shaking, ensuring the continuity of the measurement action, and consequently making the measurement data more accurate and reliable.

[0058] Locking elements 38 are installed on both sides of the measuring slide 32. The position of the measuring slide 32 is fixed when not in use or during transportation.

[0059] The locking component 38 includes a sliding frame 381, a locking rod 382, ​​a locking pull plate 383, a locking spring 384, and a plug-in rod 385. The sliding frame 381 is slidably connected to the outer side of the connecting vertical plate 323. A plug-in rod 385 is vertically arranged at one end of the inner side of the sliding frame 381. The top surface of the movable foot pedal 23 has a plug-in groove adapted to the plug-in rod 385. The plug-in rod 385 is located directly above the plug-in groove. The locking rod 382 is slidably connected through the other side of the sliding frame 381. A locking pull plate 383 is arranged on the outer side of the locking rod 382. A plurality of locking springs 384 are arranged between the locking pull plate 383 and the sliding frame 381. A fixing hole adapted to the locking rod 382 is opened on the outer side of the connecting vertical plate 323.

[0060] When it is necessary to fix the measuring slide 32, pull the locking plate 383 outward to disengage the locking rod 382 from the fixing hole, and then slide the sliding sleeve 381 downward to insert the plug rod 385 into the plug groove. At this point, the measuring slide 32 is fixed.

[0061] During measurement, pull the locking plate 383 upwards to disengage the insertion rod 385 from the insertion slot. Continue moving upwards until the locking rod 382 aligns with the fixing hole. Then, insert the locking rod 382 into the fixing hole. The locking spring 384 prevents the locking rod 382 from disengaging from the fixing hole without user contact.

[0062] A sit-and-reach measurement device includes a return component 4 installed on the rear side of the measurement component 3, which pushes the measuring end of the measurement component 3 back to its original position after each measurement.

[0063] The return assembly 4 includes a return vertical plate 41, a return top plate 42, a return push rod 43, and a return push plate 44. The return vertical plate 41 is provided on the top surface of the supporting base plate 34, and the return top plate 42 is provided at the top of the return vertical plate 41. The return push rod 43 is installed on the side of the return top plate 42 facing the measuring push plate 33, and the return push plate 44 is provided at the output end of the return push rod 43. The return push rod 43 is an electric push rod, and those skilled in the art can choose the model themselves. After the measurement is completed and the data is recorded, the return push rod 43 automatically drives the return push plate 44 to extend, smoothly pushing the measuring push plate 33 and the measuring slide 32 back to the zero or starting position of the measuring ruler 31. No manual operation is required, realizing fast and accurate reset, which is especially suitable for large-scale, high-frequency testing scenarios and significantly improves testing efficiency.

[0064] A sit-and-reach measurement device includes a cheating detection component 5, installed on the top surface of a base plate 1, to monitor multiple parts of the user's body and prevent cheating by extending the fingertips further during measurement. The cheating detection component 5 includes a knee flexion detector 51, a hip lift detector 52, and an alarm light 53.

[0065] The knee flexion monitoring device 51 is installed on both sides of the base plate 1 to fix the thighs and calves of the person being measured and to monitor the knees of the person being measured, so as to avoid knee flexion violations.

[0066] The hip lift monitoring device 52 is installed on the side of the base plate 1 away from the measuring component 3 to monitor the hips of the person being measured and prevent hip lift violations.

[0067] The hip-raising detection device 52 is equipped with alarm lights 53 on both sides. When the knee-bending detection device 51 and the hip-raising detection device 52 detect cheating by the measurer, the alarm lights 53 will sound an alarm.

[0068] The knee flexion monitoring device 51 includes a drive box 5011, a drive screw 5012, a drive slider 5013, a drive motor 5014, a drive frame 5015, a longitudinal push rod 5016, a lifting slider 5017, a transverse push rod 5018, a knee flexion plate 5019, a thigh connecting rod 5020, a thigh limiting plate 5021, a lower leg telescopic rod 5022, a lower leg telescopic screw 5023, a lower leg telescopic handwheel 5024, a lower leg limiting plate 5025, and a knee sensor 5026.

[0069] A drive box 5011 is respectively provided on both sides of the base plate 1. The drive box 5011 has a hollow structure, and a drive groove is opened through its top surface along its length. A drive screw 5012 is rotatably connected to the inner cavity of the drive box 5011 along its length. A drive motor 5014 is installed on one side of the drive box 5011. The drive motor 5014 is a stepper motor that can rotate forward, reverse, and rotate at a fixed angle. This drives the subsequent structure to achieve precise adjustment.

[0070] The output shaft of the drive motor 5014 extends into the drive housing 5011 and is fixedly connected to one end of the drive screw 5012. A drive slider 5013 is screwed through the drive screw 5012. The bottom end of the drive slider 5013 is slidably connected to the bottom surface of the inner cavity of the drive housing 5011. The drive frame 5015 is L-shaped, and one end of its long side is fixedly connected to the top surface of the drive slider 5013 through the drive groove.

[0071] A longitudinal push rod 5016 is mounted on the short side bottom surface of the L-shaped drive frame 5015. The longitudinal push rod 5016 is an electric push rod, and those skilled in the art can select the appropriate model. A lifting slider 5017 is provided at the output end of the longitudinal push rod 5016. One end of the lifting slider 5017 is slidably connected to the drive frame 5015, and a transverse push rod 5018 is mounted on the other end of the lifting slider 5017. The transverse push rod 5018 is an electric push rod, and those skilled in the art can select the appropriate model. The output end of the transverse push rod 5018 is provided with a knee-bending horizontal plate 5019. A thigh connecting rod 5020 is provided at the rear end of the bottom surface of the knee-bending horizontal plate 5019. A thigh limiting plate 5021 is provided at the lower end of the thigh connecting rod 5020. A calf telescopic rod 5022 is provided at the front end of the bottom surface of the knee-bending horizontal plate 5019. A calf telescopic screw 5023 is threaded through the knee-bending horizontal plate 5019. The bottom end of the calf telescopic screw 5023 is rotatably connected to the top surface of the calf limiting plate 5025. A calf telescopic handwheel 5024 is provided at the top end of the calf telescopic screw 5023. A knee sensor 5026 is installed in the middle of the bottom surface of the knee-bending horizontal plate 5019. The knee sensor 5026 is a distance sensor, and its model can be selected by those skilled in the art.

[0072] The drive motor 5014 drives the drive screw 5012 to rotate, thereby driving the drive slider 5013 to move forward and backward along the bottom surface of the drive box 5011, which in turn drives the drive frame 5015 to move back and forth, so that the moving frame moves to the knee side of the person being measured; at this time, the transverse push rod 5018 extends, causing the knee-bending plate 5019 to be positioned directly above the knee of the person being measured, and the thigh limiting plate 5021 and the calf limiting plate 5025 to be positioned directly above the thigh and calf of the person being measured, respectively; at this time, the longitudinal... The push rod 5016 extends, and through the lifting slider 5017, it drives the knee bending plate 5019, the thigh limiting plate 5021, and the calf limiting plate 5025 to move downwards until the thigh limiting plate 5021 and the calf limiting plate 5025 press against the surface of the measured person's thigh and calf. Then, the calf extension handwheel 5024 is turned, and through the calf extension screw 5023, the calf limiting plate 5025 is driven to move up and down, performing a secondary lifting and lowering adjustment so that the calf limiting plate 5025 is at a suitable height. Through the limiting compression of the calf limiting plate 5025 and the thigh limiting plate 5021, the measured person is unable to bend their knee.

[0073] After the thigh limiting plate 5021 and the calf limiting plate 5025 are pressed against the surface of the measuring person's thigh and calf, the knee sensor 5026 monitors the height and position of the measuring person's knee. The model of the knee sensor 5026 can be selected by those skilled in the art. When the distance decreases, i.e., when the measuring person bends their knee and raises it, the knee sensor 5026 sends a signal back, causing the alarm light 53 to sound an alarm.

[0074] Through the coordinated action of the drive motor 5014, the longitudinal push rod 5016, and the transverse push rod 5018, the thigh limiting plate 5021 and the calf limiting plate 5025 can be automatically or manually adjusted to the optimal fixed position according to the leg length, height, and leg position of different measurers. At the same time, during the measurement process, the knee sensor 5026 monitors the knee lifting and bending movements in real time. Once knee bending is detected, the alarm light 53 immediately issues a warning, realizing three-dimensional and dynamic monitoring of leg posture and effectively preventing knee bending cheating.

[0075] The hip-lifting monitoring device 52 includes a seat plate 521, a monitoring strip 522, and a pressure sensor 523. The seat plate 521 is L-shaped, and the top surface of the base plate 1 has a mounting groove adapted to the seat plate 521. The seat plate 521 is placed in the mounting groove, and a monitoring groove is formed on the top surface of the seat plate 521. Several sets of pressure sensors 523 are installed in the monitoring groove, and the detection end of each set of pressure sensors 523 is provided with a monitoring strip 522. Alarm lights 53 are provided on both sides of the seat plate 521. When the person being measured sits on the seat plate 521, their buttocks are in contact with the monitoring strip 522. During the measurement process, if the person attempting to lift their buttocks to cheat, the contact pressure between the buttocks and the monitoring strip 522 at different positions will change significantly in distribution and value. The pressure sensor 523 captures this change in real time and triggers the alarm light 53, effectively preventing cheating by artificially increasing the distance by lifting the buttocks.

[0076] This device is also equipped with a controller. The controller model can be selected by those skilled in the art. The controller constitutes the control system of this device and is installed on the rear side of the base plate 521. The controller is connected to each electrical component in the device through circuits and is used to receive signals from each sensor and control each actuator to run automatically according to preset logic to achieve control.

[0077] A method for using a sit-and-reach measurement device specifically includes the following steps:

[0078] Step S1: Device initialization.

[0079] Place the equipment on a level surface, ensuring that the friction pads at the bottom of each support leg are in stable contact with the ground. Turn on the power to the equipment; the return push rod will automatically drive the return push plate, pushing the measuring slide and measuring push plate to the zero starting position of the measuring scale.

[0080] Step S2: The moving foot pedal assembly adaptively adjusts.

[0081] The user sits on the seat with their legs extended and heels pointing towards the moving foot pedal. The control system activates the foot pedal push rod, driving the moving foot pedal along the sliding rail towards the user. When the heel just touches the foot pedal contact plate, the foot pedal sensor outputs a trigger signal, and the foot pedal push rod immediately stops moving.

[0082] Step S3: Adjust the position of the knee flexion monitoring component.

[0083] Based on the measurer's leg length and thigh and calf height, the knee flexion monitoring device is automatically or manually adjusted by the control system.

[0084] The drive motor drives the drive screw to rotate, causing the drive slider and drive frame to move along the length of the base plate, adjusting the front and rear positions of the thigh limit plate and the calf limit plate;

[0085] The lateral push rod pushes the knee-bending plate to move laterally, so that the thigh limiting plate and the calf limiting plate are aligned with the measured person's leg;

[0086] The longitudinal push rod pushes the lifting slider downward to adjust the overall height of the knee-bending horizontal plate, so that the thigh limit plate and the calf limit plate press against the surface of the measured person's thigh and calf.

[0087] Rotate the calf extension handwheel to adjust the height of the calf limit plate via the calf extension screw, so that the calf limit plate fits precisely against the front of the measurer's calf.

[0088] After adjustment, the thigh limiting plate is placed on top of the subject's thigh, the calf limiting plate is placed on top of the subject's calf, and the distance sensor is aligned with the knee area.

[0089] Step S4: Measure the execution of the action.

[0090] The person taking the measurement bends forward, extends their arms, and places their fingertips against the measuring push plate, pushing it forward at a constant speed along the measuring ruler.

[0091] During the pushing process: the measuring slide slides smoothly on the measuring ruler, and the double slider, double side vertical plates and diagonal bracing structure ensure that the pushing is smooth and without jamming or shaking;

[0092] The distance sensor detects and measures the moving distance of the push plate in real time and displays the data dynamically on the display.

[0093] Meanwhile, multiple pressure sensors in the hip lift monitoring component continuously monitor the contact pressure distribution between the subject's hips and the monitoring strip.

[0094] The distance sensor in the knee flexion monitoring component continuously monitors whether the thigh or knee is lifting or bending.

[0095] Step S5: Determine and issue an alarm for cheating behavior.

[0096] When the control system detects the following abnormal conditions, it will immediately trigger an alarm light and record the violation:

[0097] Detection of cheating by raising buttocks: If the pressure distribution between the buttocks and the monitoring strip changes drastically (such as the pressure on some monitoring strips suddenly dropping to 0), and the pressure sensor signal is abnormal, it is determined to be cheating by raising buttocks.

[0098] Knee bending cheating detection: If the distance sensor detects that the knee or thigh has moved upwards relative to the initial reference position beyond a preset threshold, it is determined to be knee bending cheating.

[0099] The flashing alarm light reminds the tester that the measurement result can be marked as invalid or needs to be retested.

[0100] Step S6: Data recording and measurement, automatic return of the slide.

[0101] The measurer pushes their finger to its limit and holds it for a moment, then the distance sensor reads the final value.

[0102] Subsequently, the return push rod is activated, driving the return push plate to extend and smoothly push the measuring push plate and measuring slide back to the zero starting position of the measuring scale. After the return is completed, the return push rod automatically retracts.

[0103] It should be noted that, in this document, relational terms such as “first” and “second” are used merely 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.

[0104] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims. It should be understood that this application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A seated forward flexion measuring device, comprising a base plate, characterized in that: It also includes a movable foot pedal assembly, which is installed on one side of the top surface of the base plate. The movable foot pedal assembly is a movable structure to adapt to the body shape of different people being measured. A measuring component, mounted on top of the movable foot pedal assembly, measures the distance a user pushes forward with their fingertips; A return component, installed on the rear side of the measuring component, pushes the measuring end of the measuring component back to its original position after each measurement; A cheating detection component is installed on the top surface of the base plate to monitor multiple parts of the measurer's body and prevent the measurer from cheating by pushing their fingertips a longer distance during the measurement.

2. The sit-and-reach measurement device according to claim 1, characterized in that: Each corner of the base plate is provided with a support leg, and the bottom surface of the support leg is provided with a friction pad.

3. The sit-and-reach measurement device according to claim 1, characterized in that: The movable foot pedal assembly includes a movable slide rail, a movable slide base, a movable foot pedal, a rear extension plate, a rear mounting plate, and a foot pedal push rod. A pair of movable slide rails are provided on the top surface of the base plate along its length. Movable slide bases are slidably connected to the top surfaces of the movable slide rails. Rear extension plates are provided on the top surfaces of the two movable slide bases. A movable foot pedal is provided at the front end of the rear extension plate. A groove adapted to the movable slide base is opened through the bottom of the movable foot pedal. One end of the movable slide base passes through the groove, and its end face extends to be flush with the side of the movable foot pedal away from the rear extension plate. A rear mounting plate is provided at one end of the top surface of the base plate. A foot pedal push rod is installed on the side of the rear mounting plate facing the movable foot pedal. The output end of the foot pedal push rod is fixedly connected to the movable foot pedal.

4. The sit-and-reach measurement device according to claim 1, characterized in that: The measuring assembly includes a measuring ruler, a measuring slide, a measuring push plate, a supporting base plate, and a triangular bracket. The measuring ruler is mounted on the top surface of the movable foot pedal, and the supporting base plate is mounted on the bottom surface of the rear end of the measuring ruler. A pair of triangular brackets are mounted between the supporting base plate and the rear extension plate. The measuring slide is slidably connected to the top of the measuring ruler, and the measuring push plate is mounted on the top of the measuring slide.

5. The sit-and-reach measurement device according to claim 4, characterized in that: The measuring ruler has equally spaced scale protrusions on both sides of its lower part.

6. The sit-and-reach measurement device according to claim 4, characterized in that: A measuring mounting plate is provided at the rear end of the measuring ruler, and a distance sensor is installed on the side of the measuring mounting plate facing the measuring push plate to detect the moving distance of the measuring push plate.

7. The sit-and-reach measurement device according to claim 4, characterized in that: The measuring slide includes a measuring slider, a connecting top plate, a connecting vertical plate, and connecting diagonal braces. Two measuring sliders are slidably connected to the top surface of the measuring ruler. A connecting top plate is provided on the top surface of the two measuring sliders. A pair of connecting diagonal braces are provided on each side of the connecting top plate. The two connecting diagonal braces on the same side face outward from the middle of the connecting top plate and are fixedly connected to both sides of the connecting vertical plate. Connecting diagonal braces are provided between the lower parts of both sides of the connecting vertical plate and the measuring sliders. The measuring push plate is provided on the top of the two connecting vertical plates.

8. The sit-and-reach measurement device according to claim 7, characterized in that: Locking elements are installed on both sides of the measuring slide.

9. A seated forward flexion measuring device according to claim 8, characterized in that: The locking component includes a sliding frame, a locking rod, a locking plate, a locking spring, and a plug-in rod. The sliding frame is slidably connected to the outer side of the connecting vertical plate. A plug-in rod is vertically arranged at one end of the inner side of the sliding frame. A plug-in groove adapted to the plug-in rod is opened on the top surface of the movable foot pedal. The plug-in rod is located directly above the plug-in groove. A locking rod is slidably connected through the other side of the sliding frame. A locking plate is arranged on the outer side of the locking rod. A plurality of locking springs are arranged between the locking plate and the sliding frame. A fixing hole adapted to the locking rod is opened on the outer side of the connecting vertical plate.

10. A seated forward flexion measuring device according to claim 1, characterized in that: The return assembly includes a return vertical plate, a return top plate, a return push rod, and a return push plate. The return vertical plate is provided on the top surface of the support base plate, and the return top plate is provided at the top of the return vertical plate. The return push rod is installed on the side of the return top plate facing the measuring push plate, and the return push plate is provided at the output end of the return push rod.

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