CN217987578U - A device for testing biomechanical properties of human knee joints - Google Patents

Abstract

The utility model discloses a device for testing biomechanical properties of human knee joints, which comprises a test chair. The test chair includes a chair back and a lower frame. , There are two groups of clamping devices symmetrically arranged on both sides of the hollow cylinder, a pressure test device is located under the clamping device inside the lower frame, a spring buckle is provided on one side of the pressure test device, and an ultraviolet lamp is arranged above the spring buckle. The above devices cooperate with each other to fix the patient's knee in advance, avoid the patient's movement deformation due to stress response during the test, and help the doctor's test work. By setting the pressure test device and sliding device, the patient's knees can be accurately measured. The difference in the force exerted by each calf in the same direction can be used to obtain the wear and tear of the knees of the legs, prevent knee injuries in advance, and realize the storage and automatic disinfection functions of the pressure test device.

Description

A device for testing biomechanical properties of human knee joints

technical field

The utility model relates to the field of biomedicine, in particular to a device for testing biomechanical properties of human knee joints.

Background technique

Biomechanics (biomechanics) is a branch of biophysics that applies the principles and methods of mechanics to the quantitative study of mechanical problems in living organisms. The knee joint is the largest and most complex joint in the human body. Its main movement is in the sagittal plane. In addition to the flexion action of the knee joint, it also allows moderate internal and external rotation and a little adduction (adduction) and abduction (abduction) activities. Useful information, the knee joint system transmits loads, participates in motion, assists in maintaining momentum, and provides a force couple related to leg activities. It can bear considerable loads and provides an important linkage system (linkage) in human activities. On the other hand, because Located far from the center of gravity of the human body, body weight often has the longest arm of action, so the knee joint is also extremely vulnerable to damage, so it is also one of the most important areas that require human input in physical therapy and biomechanical research and testing.

After searching, the Chinese patent publication number is CN 204890013 U, which discloses a standardized tester for knee joint muscle strength, which helps to make the measurement of knee joint muscle strength more standardized and standardized, and minimizes the interference of human and subjective factors, so as to be more objective , Serving impartially in the forensic practice of clinical forensics.

However, the above-mentioned device can only measure the rotation angle of the knee joint, and cannot intuitively and accurately measure the strength of the patient's lower limbs. It is easily affected by objective factors such as sitting posture, and there is a problem of inaccurate testing. In addition, the doctor's assistance is still needed during the testing process. Hold the patient's lower limbs to fix the knee, and in this process, the patient is prone to stress response movements, resulting in deformation of movements and causing inconvenience to the doctor's work.

Aiming at the problems in the related technologies, no effective solution has been proposed yet.

Utility model content

The purpose of this utility model is to provide a biomechanical characteristic testing device of the human knee joint, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A device for testing biomechanical properties of human knee joints, including a test chair. The test chair includes a chair back and a lower frame. Two armrests are symmetrically arranged on the upper surface of the lower frame. There are two sets of clamping devices symmetrically. The clamping device is located below the lower frame and is equipped with a pressure test device. One side of the pressure test device is provided with a spring buckle, and an ultraviolet lamp is provided above the spring buckle.

Further, in order to fix the knee of the patient conveniently and avoid the deformation of the patient's movement during the test, the clamping device includes two sets of clamping pads, and between the two sets of clamping pads, there are threaded rods one and one set in sequence from left to right. Cylinder 1 and threaded rod 2, the left side of the two groups of clamping pads are provided with sleeve 2 and threaded rod 3 in sequence from left to right, and the right side of the two groups of clamping pads are provided with threaded rod 4 and sleeve 3 in sequence from left to right Sleeve 1, sleeve 2 and sleeve 3 are all provided with gear 1, below gear 1 is provided with shaft 1, and shaft 1 runs through the lower frame. The number is three gears two, and the gear one matches the gear two in the corresponding position.

Further, in order to facilitate the measurement of the difference in the force of the patient's two lower legs in the same direction, and then to obtain the wear and tear of the knees of the legs, and to prevent knee injuries in advance, the pressure test device includes a drawer, a sliding device is provided under the drawer, and a Rotating shaft 2, the two ends of the rotating shaft 2 are connected to the drawer through bearings, and one end of the rotating shaft 2 extends through the drawer and is connected with a knob 2, one side of the rotating shaft 2 is provided with a limit device, the rotating shaft 2 is provided with a bracket, and the end of the bracket away from the rotating shaft 2 is provided There is an arc-shaped plate, one end of the arc-shaped plate is symmetrically provided with two force-bearing leg sleeves, the upper part of the force-bearing leg sleeve is connected with the arc-shaped plate through a gravity reset device, and the space between the arc-shaped plate and the force-bearing leg sleeve is located on the outer wall of the arc-shaped plate There are two pressure sensors, the gravity reset device includes a connecting slider, and an inclined track is arranged above the connecting slider.

Further, in order to limit the rotation angle of the pressure test device, and to fix the position and maintain stability when the device is in use, the limiting device includes a fan-shaped limit block, which is located on the second rotating shaft and connected to the inner wall of the drawer, and the fan-shaped limit block There is a limit strip on one side.

Further, in order to enable the drawer to slide in the lower frame to realize the storage function of the pressure test device, the sliding device includes a slide bar and a slide rail, the slide bar is located under the drawer, and the slide rail is located on the inner wall below the lower frame, and the slide bar and the slide rail are connected to each other. Matching, spring clasp includes gripping ends and bead.

Compared with the prior art, the utility model has the following beneficial effects:

(1) Through the mutual cooperation of the above devices, the patient's knee can be fixed in advance, avoiding the deformation of the patient's movement due to the stress response during the test, which is helpful to the doctor's test work, and by setting the pressure test device and sliding device, it can be Measure the difference in the force of the patient's two lower legs in the same direction, and then obtain the wear and tear of the knees of the legs, prevent knee injuries in advance, and realize the storage and automatic disinfection functions of the pressure test device.

(2) Through the cooperation of the spring buckle and the ultraviolet lamp, the pressure test device can be disinfected synchronously after being retracted, the rotation angle of the pressure test device is limited, and the position is fixed when the device is in use to maintain stability.

(3) By setting the gravity reset device, the force of the patient's forward kick can be transmitted to the pressure sensor, and at the same time, it can also protect the patient's legs from being hurt by the reaction force of hard objects when kicking forward.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic diagram of a three-dimensional structure of a device for testing biomechanical properties of a human knee joint according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the internal structure of a device for testing biomechanical properties of a human knee joint according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a clamping device of a device for testing biomechanical properties of a human knee joint according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a pressure testing device of a biomechanical characteristic testing device of a human knee joint according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a gravity reset device of a human knee joint biomechanical characteristic testing device according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a limit device of a device for testing biomechanical properties of a human knee joint according to an embodiment of the present invention;

Reference signs:

1. Test chair; 2. Chair back; 3. Lower frame; 4. Armrest; 5. Hollow cylinder; 6. Clamping device; 7. Pressure testing device; 8. Spring buckle; 9. Ultraviolet lamp; 10. Clamp Tight gasket; 11, threaded rod one; 12, sleeve one; 13, threaded rod two; 14, sleeve two; 15, threaded rod three; 16, threaded rod four; 17, sleeve three; 18, gear one; 19. Gear 2; 20. Shaft 1; 21. Knob 1; 22. Drawer; 23. Shaft 2; 24. Limiting device; 25. Bracket; 26. Arc plate; 27. Forced leg sleeve; 28. Pressure Induction instrument; 29. Gravity reset device; 30. Sector-shaped limit block; 31. Limit bar; 32. Slide bar; 33. Slide rail; 34. Connecting slider; 35. Inclined track; 36. Clamping end; 37 , touch beads; 38, knob two; 39, sliding device.

detailed description

Below, in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Embodiment one:

Please refer to Fig. 1-6, a kind of biomechanical characteristic test device of human knee joint according to the utility model embodiment, comprises test chair 1, and test chair 1 comprises chair back 2 and lower frame 3, and the upper surface of lower frame 3 is symmetrically arranged Two handrails 4, a hollow cylinder 5 is provided in the middle between the handrails 4, two sets of clamping devices 6 are arranged symmetrically on both sides of the hollow cylinder 5, and a pressure testing device 7 is provided under the clamping device 6 inside the lower frame 3, A spring buckle 8 is arranged on one side of the pressure testing device 7 , and an ultraviolet lamp 9 is arranged above the spring buckle 8 .

The lower frame 3 has three through holes above the lower frame 3, the hollow tube 5 and the handrail 4 are connected above the through holes, and the first gear 18 and the second gear 19 carry out meshing movement inside the through holes.

The hollow cylinder 5 is hollow inside.

The spring buckle 8, the model of the spring buckle 8 is TUFP9_1633224340365, which is used to fix the drawer 22. Since the touch bead 37 is fixedly connected with the drawer 22, when the drawer 22 is pressed down to the inside of the frame 3, the spring buckle 8 The clamping end 36 of the spring buckle 8 can clamp the touch bead 37, thereby fixing the drawer 22 to be stored inside the lower frame 3. When the drawer 22 is pressed again, the clamping end 36 of the spring buckle 8 will release the touch bead 37. At this time, the drawer can be 22 pull out.

When the clamping end 36 of the ultraviolet lamp 9 and the spring buckle 8 are connected with the bead 37, the ultraviolet lamp 9 will be triggered to open, and the ultraviolet lamp 9 will be automatically closed after working for ten minutes.

Through the above scheme of the utility model, the patient's knee position can be fixed in advance, avoiding the deformation of the patient's movement due to the stress response during the test, which is helpful to the doctor's test work, and by setting the pressure test device 7 and the sliding device 39, It can measure the difference in force of the patient's two lower legs in the same direction, and then obtain the wear and tear of the knees of both legs, prevent knee damage in advance, and realize the storage and automatic disinfection functions of the pressure test device 7 .

Embodiment two:

Please refer to Fig. 1-6, in order to fix the knee of the patient conveniently and avoid deformation of the patient's movement during the test, the clamping device 6 includes two sets of clamping pads 10, and the two sets of clamping pads 10 are in order from left to right There are threaded rod one 11, sleeve one 12 and threaded rod two 13, the left side of two groups of clamping pads 10 is provided with sleeve two 14 and threaded rod three 15 in sequence from left to right, and the right side of two groups of clamping pads 10 From left to right, threaded rod four 16 and sleeve three 17, sleeve one 12, sleeve two 14 and sleeve three 17 are provided with gear one 18, and the bottom of gear one 18 is provided with rotating shaft one 20, rotating shaft one 20 runs through the lower frame 3, and one end of the rotating shaft one 20 is located at the outer side of the lower frame 3 and is provided with a knob one 21, and the rotating shaft one 20 is provided with three gears two 19, and the gear one 18 matches the gear two 19 at the corresponding position.

The clamping pad 10 is used to fix the patient's thigh and knee to prevent the patient from deforming due to the stress response during the test. The clamping pad 10 is composed of two arc-shaped bodies, and a soft sponge can be placed inside the clamping pad 10. Improves comfort during use, and the sponge is easy to replace.

Sleeve two 14, the interior of the sleeve two 14 is hollow and provided with threads, the sleeve two 14 is fixedly connected with the handrail 4, and the sleeve two 14 is matched with the threaded rod three 15.

Sleeve one 12, sleeve one 12 is hollow inside and is provided with screw thread, sleeve one 12 is fixedly connected with hollow tube 5, and sleeve one 12 two ends match with threaded rod one 11 and threaded rod two 13.

Sleeve three 17, the interior of sleeve three 17 is hollow and provided with threads, the sleeve three 17 is fixedly connected with the handrail 4, and the sleeve three 17 is matched with the threaded rod four 16.

Through the above scheme of the utility model, the clamping pads 10 are made close to each other through the principle of thread rotation to realize the clamping function, which is convenient for fixing the patient's knee and avoids deformation of the patient's movement during the test.

Embodiment three:

Please refer to Fig. 1-6, pressure test device 7 comprises drawer 22, is provided with sliding device 39 below drawer 22, and drawer 22 inner side is provided with rotating shaft 2 23, and rotating shaft 2 23 two ends are connected with drawer 22 through bearing, and rotating shaft 2 23 one end runs through drawer 22 and is connected with knob 2 38, and one side of rotating shaft 2 23 is provided with limiter 24, and rotating shaft 2 23 is provided with support 25, and the end of support 25 away from rotating shaft 2 23 is provided with arc-shaped plate 26, arc-shaped One end of the plate 26 is symmetrically provided with two stressed leg covers 27, the top of the stressed leg covers 27 is connected to the arc plate 26 through a gravity reset device 29, and the space between the arc plate 26 and the stressed leg covers 27 is located on the outer wall of the arc plate 26 There are two pressure sensors 28 on it.

The gravity resetting device 29 includes a connecting slider 34 , and an inclined track 35 is arranged above the connecting slider 34 .

The drawer 22 is provided with a handle on the outside drawer 22, and the drawer 22 is provided with a sliding opening on the side where the limiting device 24 is located, and the limiting bar 31 can slide left and right in the sliding opening.

Two rotating shafts 23, one end of the second rotating shaft 23 near the limit device 24 has a raised end, and the raised end of the second rotating shaft 23 is matched with the fan-shaped limiting block 30.

Stressed leg cover 27, the inside of stressed leg cover 27 is pasted with disposable pad cloth by Velcro, and disposable pad cloth can be replaced after each use to avoid cross-infection.

Connecting slider 34, the shape of connecting slider 34 is wide at the top and narrow at the bottom, and can be stuck in the inclined track 35 and slide back and forth.

Inclined track 35, the shape of the groove of the inclined track 35 is wide at the top and narrow at the bottom, matching with the connecting slider 34, and the inclined track 35 has an inclined radian. The leg cover 27 will be brought by the connecting slider 34 to slide back to the initial position along the direction away from the pressure sensor 28 .

The pressure sensor 28 includes a sensor and a display, which can accurately broadcast and display pressure values on an electronic screen.

Through the above scheme of the utility model, it is convenient to measure the difference in the force of the patient's two lower legs in the same direction, and then obtain the wear and tear of the knees of the legs, prevent knee damage in advance, and the gravity reset device 29 can transmit the force of the patient's forward kick to the The pressure sensor 28 can also protect the patient from being hurt by the reaction force of hard objects when the legs are kicked forward.

Embodiment four:

Please refer to FIGS. 1-6 , the limiting device 24 includes a fan-shaped limiting block 30 located on the second rotating shaft 23 and connected to the inner wall of the drawer 22 , and a limiting bar 31 is provided on one side of the fan-shaped limiting block 30 .

The fan-shaped limit block 30 is used to control the rotation angle of the second rotating shaft 23 .

Limiting bar 31, and limiting bar 31 slides left and right in the slide opening that one side of drawer 22 has, and rotating shaft 2 23 can be fixed.

Through the above solution of the utility model, the rotation angle of the pressure testing device 7 is limited, and the position is fixed when the device is in use, so as to maintain stability.

Embodiment five:

Please refer to FIGS. 1-6 , the sliding device 39 includes a sliding bar 32 and a sliding rail 33 , the sliding bar 32 is located below the drawer 22 , the sliding rail 33 is located on the inner wall below the lower frame 3 , and the sliding bar 32 matches the sliding rail 33 .

The spring buckle 8 includes a clamping end 36 and a touch bead 37 .

Slide bar 32, one end of slide bar 32 protrudes to match the groove of slide rail 33, when drawer 22 is pulled to the outermost side, the raised end of slide bar 32 will meet the bottom end of the groove of slide rail 33 Blocked, limit the maximum distance that the drawer 22 is pulled out.

Through the above solution of the present invention, the drawer 22 can slide in the lower frame 3 to realize the storage function of the pressure testing device 7 .

In order to facilitate the understanding of the above-mentioned technical solution of the utility model, the working principle of the utility model in the actual process will be described in detail below.

In actual application, this device can be placed in hospital outpatient clinics and physical examination centers for use. The patient sits on the test chair 1, turns the knob one 21, and the rotation shaft one 20 is driven by the knob one 21 to rotate, so that the gear one 18 rotates and is connected with the gear two 19 meshing, gear two 19 drives sleeve one 12, sleeve two 14 and sleeve three 17 to rotate, so that threaded rod one 11 and threaded rod three 15 are close to each other, threaded rod two 13 and threaded rod four 16 are close to each other, and then the clamp The tight pads 10 are close to each other to fix the patient's thighs and knees to avoid deformation of the patient's movement, and it is convenient for the doctor to perform front and rear drawer experiments and inspections on the patient. When it is necessary to test the strength of the patient's calf kicking forward, the drawer 22 is downward Press the inner direction of the frame 3, and the clamping end 36 of the spring buckle 8 will release the touch bead 37 under force. At this time, the drawer 22 can be pulled out through the sliding device 39. When the drawer 22 is pulled to the outermost side, the sliding bar 32 The raised end of the slide rail 33 will be stuck at the bottom of the groove to limit the maximum distance that the drawer 22 can be pulled out. Similarly, when the drawer 22 needs to be put away, the drawer 22 is pressed down to the inside of the frame 3 again. The clamping end 36 of the spring buckle 8 can clamp the touch bead 37, thereby fixing the drawer 22 to be stored inside the lower frame 3. After the drawer 22 is pulled out, turn the knob 2 38 to drive the rotating shaft 2 23, and the rotating shaft 23 rotates with the support 25 Rotate, support 25 rotates with rotating shaft 2 23 as the center, thereby stretches upwards with arc-shaped plate 26, and the fan-shaped stop block 30 that rotating shaft 2 23 one sides is provided with can control the rotation angle of rotating shaft 2 23, and limit bar 31 can be fixed Rotating shaft 2 23 does not fall back. When the patient's legs kick forward, the force-bearing leg sleeve 27 slides forward along the inclined track 35 under force, and finally contacts the pressure sensor 28, which will broadcast and display on the electronic screen. The pressure value is displayed. After the stressed leg cover 27 is not stressed, the connecting slider 34 will slide back to the initial position with the stressed leg cover 27 along the direction away from the pressure sensor 28, and wait for the next use. The above devices cooperate with each other and can Fix the patient's knee in advance to avoid deformation of the patient's movement due to stress response during the test, which is helpful for the doctor's test work. By setting the pressure test device 7 and the sliding device 39, it is possible to accurately measure the same direction of the patient's two calves. The difference in the magnitude of the force is used to obtain the wear and tear of the knees of the legs, prevent knee injuries in advance, and realize the storage and automatic disinfection functions of the pressure testing device 7 .

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. a human knee joint biomechanical characteristic testing device, is characterized in that, comprises test chair (1), and described test chair (1) comprises chair back (2) and lower frame (3), and described lower frame (3) ) is symmetrically provided with two handrails (4) on the upper surface, a hollow cylinder (5) is provided at the middle position between the handrails (4), and two sets of clamping devices ( 6), the clamping device (6) is located below the lower frame (3) and is provided with a pressure test device (7), one side of the pressure test device (7) is provided with a spring buckle (8), and the spring An ultraviolet lamp (9) is arranged above the buckle (8). 2. a kind of biomechanical characteristic testing device of human knee joint according to claim 1, is characterized in that, described clamping device (6) comprises two groups of clamping pads (10), two groups of clamping pads ( 10) are provided with threaded rod one (11), sleeve one (12) and threaded rod two (13) sequentially from left to right, and the left sides of the two groups of clamping pads (10) are provided in sequence from left to right There are two sleeves (14) and three threaded rods (15), and the right side of the two sets of clamping pads (10) is provided with four threaded rods (16) and three sleeves (17) from left to right. Tube one (12), sleeve two (14) and sleeve three (17) are all provided with gear one (18), and described gear one (18) below is provided with rotating shaft one (20), and described rotating shaft one ( 20) Through the lower frame (3), one end of the rotating shaft (20) is located on the outside of the lower frame (3) and a knob one (21) is provided, and the rotating shaft one (20) is provided with three The second gear (19), the first gear (18) is matched with the second gear (19) at the corresponding position. 3. a kind of human knee joint biomechanical characteristic test device according to claim 2, is characterized in that, described pressure test device (7) comprises drawer (22), and described drawer (22) below is provided with sliding device ( 39), the inner side of the drawer (22) is provided with the second rotating shaft (23), the two ends of the second rotating shaft (23) are connected to the drawer (22) through bearings, and one end of the second rotating shaft (23) runs through The drawer (22) is extended and connected with a knob two (38), a limit device (24) is provided on one side of the second rotating shaft (23), and a bracket (25) is provided on the second rotating shaft (23). One end of the support (25) away from the second rotating shaft (23) is provided with an arc-shaped plate (26), and one end of the arc-shaped plate (26) is symmetrically provided with two force-bearing leg sleeves (27), and the force-bearing leg The top of the sleeve (27) is connected to the arc plate (26) through a gravity reset device (29), and the arc plate (26) is located between the arc plate (26) and the stressed leg sleeve (27). Two pressure sensors (28) are arranged on the outer wall. 4. A kind of human knee joint biomechanical characteristic testing device according to claim 3, is characterized in that, described limiting device (24) comprises fan-shaped limiting block (30), and described fan-shaped limiting block (30) Located on the second rotating shaft (23) and connected to the inner wall of the drawer (22), a limiting bar (31) is provided on one side of the fan-shaped limiting block (30). 5. A kind of human knee joint biomechanical characteristic testing device according to claim 4, is characterized in that, described sliding device (39) comprises slide bar (32) and slide rail (33), and described slide bar (32 ) is located below the drawer (22), the slide rail (33) is located on the inner wall below the lower frame (3), and the slide bar (32) matches the slide rail (33). 6. A device for testing biomechanical properties of a human knee joint according to claim 5, characterized in that, the gravity reset device (29) comprises a connecting slider (34), and the upper part of the connecting slider (34) is arranged There are inclined tracks (35). 7. A device for testing biomechanical properties of human knee joints according to claim 6, characterized in that, the spring buckle (8) includes a clamping end (36) and a touch bead (37).

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