CN117679049B - Surface myoelectricity auxiliary test assembly under maximum isometric independent contraction condition - Google Patents

Abstract

The invention discloses a surface myoelectricity auxiliary test assembly under the condition of maximum isometric autonomous contraction, which comprises a seat for assisting a subject to perform sitting posture detection and a main binding structure attached to the seat, wherein the seat comprises a seat plate with a backrest, the bottom of the seat plate is fixedly connected with a bottom box, the bottom of the bottom box is fixedly connected with a bottom plate, and the front side of the seat plate is provided with a thigh binding structure for binding thighs. The surface myoelectricity auxiliary test assembly under the condition of maximum isometric autonomous contraction can effectively replace manpower to fix corresponding limbs of a subject, ensure corresponding muscle force, save a large amount of manpower and complete the test under the condition that a single worker is present; the test device can ensure that the test subject maintains a standard posture, prevent the motion deformation from generating compensation and ensure the test accuracy; meanwhile, the testing process is simplified, and a large amount of time for changing the body position and debugging the equipment is saved; and the two test modes share one set of structure, so that the use is convenient.

Description

A surface electromyography-assisted testing component under maximum isometric voluntary contraction conditions

Technical Field

The invention relates to the technical field of electromyography testing, in particular to a surface electromyography auxiliary testing component under maximum isometric voluntary contraction conditions.

Background technique

The measurement of muscle activation level requires collecting surface electromyography during the subject's walking process, and collecting electromyography levels when the subject's muscles are maximally activated under maximum isometric voluntary contraction, so as to obtain the subject's muscle activation level during walking. However, the current testing method has the following defects:

Disadvantage 1: Time-consuming and labor-intensive; currently, when conducting the electromyographic level test of the maximum isometric voluntary contraction when the muscle is maximally activated, the corresponding limbs of the subjects need to be fixed to ensure that the corresponding muscles exert force. However, one of the current methods for conducting this test requires several staff members to provide equal force to counter it, which consumes a lot of manpower;

Disadvantage 2: The accuracy of the results cannot be guaranteed; the staff's strength is used to fight against the subjects, which cannot ensure the stability of the subjects' postures and is prone to posture compensation, resulting in inaccurate test results;

Disadvantage 3: The process is cumbersome and time-consuming. If isokinetic muscle strength testing equipment is used instead of manpower, the equipment needs to be debugged and the corresponding angles adjusted before testing can be carried out. The process is cumbersome and time-consuming.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides a surface electromyography-assisted testing component under maximum isometric voluntary contraction conditions, which solves the problem that when testing the electromyography level of subjects when the muscles are maximally activated under maximum isometric voluntary contraction, artificial confrontation is used to assist the test, which consumes a lot of manpower and is prone to postural compensation, affecting the test results. If an isokinetic muscle strength testing instrument is used instead of manpower, the process will be cumbersome.

To achieve the above objectives, the present invention is implemented through the following technical solutions: a surface electromyography assisted test assembly under maximum isometric voluntary contraction conditions, comprising a seat for assisting a subject in performing sitting posture detection, and a main restraint structure attached to the seat, wherein the seat comprises a seat plate with a backrest, a bottom box is fixedly connected to the bottom of the seat plate, and a bottom plate is fixedly connected to the bottom of the bottom box, a thigh restraint structure for restraining the thigh is arranged on the front side of the seat plate, and an instep restraint structure for restraining the foot is arranged on the top of the bottom plate and located on the front side of the bottom box;

The main restraint structure is attached to the seat board and the bottom box for installation during the sitting posture test, and is used to restrain the subject's upper body to the seat board backrest and the subject's calf to the front side of the bottom box;

The bottom end of the main restraint structure is hooked on the bottom plate when performing standing posture detection, and the main restraint structure is used to press down the shoulders of the test subject.

Preferably, the main restraint structure comprises a long restraint belt, one end of which is provided with a hanging buckle, and a middle section of the long restraint belt is provided with a plurality of hanging rings adapted to the hanging buckle at equal intervals.

Preferably, the other end of the long restraint belt is rotatably connected to a hook, and the left and right sides of the front side of the bottom box are fixedly connected to a turning frame, and the other ends of the two long restraint belts pass through the turning frame and turn backward to the middle to be hooked and connected to each other through the hook to bind the calf.

Preferably, the left and right sides of the seat board are provided with a plurality of notches for passing long restraint belts and guiding their trajectories. When the two sets of long restraint belts are used to restrain the upper body of the subject, they are crossed in front of the chest and hung on each other's hanging rings through hooks.

Preferably, bottom rings are fixedly connected to the left and right sides of the front top side of the bottom plate, and when performing standing posture detection, the hook at one end of the long restraint belt is hung on the corresponding hanging ring, and the other end of the long restraint belt is hung on the bottom ring through the hook.

Preferably, the instep restraint structure includes a fixing block and a positioning sleeve fixedly connected to the top of the base plate located on both sides of the front side of the base box, and a lower pressure frame is fixedly connected to the top of the base plate between the fixing block and the positioning sleeve, one side of the fixing block is fixedly connected to a short restraint belt, the other end of the short restraint belt passes through the lower pressure frame and the positioning sleeve in sequence, and the top thread of the positioning sleeve passes through a first fastening bolt that tightens and fixes the short restraint belt.

Preferably, the thigh restraint structure includes a winding box fixedly connected to a front corner of the bottom of the seat board and a winding restraint belt inside the box which is wound up by a winding shaft. A notch is also provided in the middle of the front side of the seat board for passing the winding restraint belt and guiding its trajectory. The other end of the winding restraint belt passes through the top of the front side of the seat board and is hooked on a T-shaped hanging shaft at the other front corner of the bottom of the seat board. The other end of the winding restraint belt is provided with a metal ring which is adapted to the T-shaped hanging shaft.

Preferably, a rear cover is installed on the rear side of the winding box, and a spring box is fixedly connected to the rear side of the rear cover, the driving shaft of the spring box passes through the rear cover and is connected to the winding shaft, and the top thread of the winding box outlet passes through a second fastening bolt for tightening the winding restraint belt.

Beneficial Effects

The present invention provides a surface electromyography-assisted testing component under the condition of maximum isometric voluntary contraction. Compared with the prior art, it has the following beneficial effects:

1. The surface electromyography-assisted test component under the condition of maximum isometric voluntary contraction can restrain the upper body, thighs, calves and insteps of the test subject to the seat during the sitting test by setting a seat in conjunction with the main restraint structure, the thigh restraint structure and the instep restraint structure. During the standing test, the main restraint structure can be pulled out and put under the shoulder to press and restrain the shoulder, which can effectively replace manpower to fix the corresponding limbs of the test subject and ensure the corresponding muscle force, saving a lot of manpower. The test can be completed with a single staff member on site; it can ensure that the test subject maintains a standard posture, prevents compensation caused by deformation of the movement, and ensures the accuracy of the test; at the same time, it simplifies the test process and saves a lot of time for changing body positions and debugging equipment; and the two test methods share a set of structures, which is easy to use.

2. The surface electromyography-assisted test component under the maximum isometric voluntary contraction condition has two sets of main restraint structures that can be installed on both sides of the seat. The upper body can be bound by cross-connection, and the other end can also be connected to realize the restraint of the calf. After pulling out, folding in half and connecting can press down the shoulder. The two installation methods only need to be passed between the notch and the change-of-direction frame. The operation is simple and the switching is convenient.

3. In the surface electromyography-assisted test component under the maximum isometric voluntary contraction condition, the instep restraint structure can be adapted and adjusted according to different subjects. The reeling restraint belt is longer and can also adapt to the thighs of subjects of different body shapes and thicknesses. It has strong adaptability, and by setting a reeling box to reel in the longer reeling restraint belt, it can be avoided that it is scattered randomly. The setting of the mainspring box is convenient for pulling and tightening the reeling restraint belt on the one hand, and on the other hand, it is also convenient for pulling out the reeling restraint belt, and it is convenient to fix it with the T-shaped hanging shaft and the second fastening bolt.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a sitting posture detection state of the present invention;

FIG2 is a schematic diagram of a standing posture detection state of the present invention;

FIG3 is a schematic structural diagram of a hook according to the present invention;

FIG4 is a rear exploded view of the thigh restraint structure of the present invention;

FIG. 5 is a schematic diagram of the instep restraint structure of the present invention.

In the figure: 1-seat, 11-sitting board, 12-bottom box, 13-bottom plate, 14-direction changing frame, 15-bottom ring, 16-notch, 2-main restraint structure, 21-long restraint belt, 22-hanging buckle, 23-hanging ring, 24-hook, 3-thigh restraint structure, 31-winding box, 32-winding shaft, 33-winding restraint belt, 34-metal ring, 35-back cover, 36-spring box, 37-second fastening bolt, 4-instep restraint structure, 41-fixing block, 42-positioning sleeve, 43-lower pressure frame, 44-short restraint belt, 45-first fastening bolt.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The present invention provides three technical solutions:

Fig. 1-2 shows a first embodiment: a surface electromyography-assisted test assembly under maximum isometric voluntary contraction conditions, comprising a seat 1 for assisting a subject in performing sitting posture detection, and a main restraint structure 2 attached to the seat 1, wherein the seat 1 comprises a seat plate 11 with a backrest, a bottom box 12 is fixedly connected to the bottom of the seat plate 11, and a bottom plate 13 is fixedly connected to the bottom of the bottom box 12, a thigh restraint structure 3 for restraining the thigh is arranged at the front side of the seat plate 11, and an instep restraint structure 4 for restraining the foot is arranged at the top of the bottom plate 13 and located at the front side of the bottom box 12;

The main restraint structure 2 is attached to the seat board 11 and the bottom box 12 when performing sitting posture detection, and the main restraint structure 2 is used to restrain the upper body of the subject to the backrest of the seat board 11 and the calf of the subject to the front side of the bottom box 12;

When the standing posture is detected, the bottom end of the main restraint structure 2 is hooked on the bottom plate 13, and the main restraint structure 2 is used to press down the shoulders of the subject.

By arranging the chair 1 in conjunction with the main restraint structure 2, the thigh restraint structure 3 and the instep restraint structure 4, the subject can restrain the upper body, thighs, calves and insteps of the subject on the chair 1 during the sitting test, and the main restraint structure 2 can be pulled out and put under the shoulders to press and restrain the shoulders during the standing test, which can effectively replace manpower to fix the corresponding limbs of the subject and ensure the corresponding muscle force, saving a lot of manpower, and the test can be completed with a single staff member on site; it can ensure that the subject maintains a standard posture, prevents compensation caused by deformation of the movement, and ensures the accuracy of the test; at the same time, it simplifies the test process and saves a lot of time for changing body positions and debugging equipment; and the two test methods share a set of structures, which is easy to use.

Figures 1 and 4 show a second embodiment, which mainly differs from the first embodiment in that the main restraint structure 2 includes a long restraint belt 21, one end of which is provided with a hook 22, and the middle section of the long restraint belt 21 is evenly spaced with a number of hanging rings 23 that are compatible with the hook 22.

The other end of the long restraint belt 21 is rotatably connected to a hook 24, and the hook 24 includes a fixed sleeve connected to the long restraint belt 21 and a metal hook rotatably arranged at its end. The metal hook can be rotatably adjusted to an angle to facilitate the two hooks 24 to hook each other. The left and right sides of the front side of the bottom box 12 are fixedly connected to the turning frame 14, and the other ends of the two long restraint belts 21 pass through the turning frame 14 and turn back to the middle to be hooked and connected to each other through the hook 24 to bind the calf.

The left and right sides of the seat plate 11 are provided with a plurality of notches 16 for passing the long restraint belts 21 and guiding their trajectories. When the two sets of long restraint belts 21 are used to restrain the upper body of the subject, they are crossed in front of the chest and hooked on the other side's hanging ring 23 through the hanging buckle 22.

Bottom rings 15 are fixedly connected to the left and right sides of the top front side of the bottom plate 13. When performing standing posture detection, the hook 22 at one end of the long restraint belt 21 is hooked on the corresponding hook 23, and the other end of the long restraint belt 21 is hooked on the bottom ring 15 through the hook 24.

Two sets of main restraint structures 2 can be installed on both sides of the seat 1. The upper body can be bound by cross connection, and the other end can be connected to realize the restraint of the calf. After being pulled out, folded in half and connected, the shoulders can be pressed down. Both installation methods only need to be passed between the notch 16 and the change-of-direction frame 14. The operation is simple and the switching is convenient.

Figures 1 and 5 show a third embodiment, which mainly differs from the second embodiment in that the instep restraint structure 4 includes a fixing block 41 and a positioning sleeve 42 fixedly connected to the top of the base plate 13 and located on both sides of the front side of the base box 12, and a lower pressure frame 43 is fixedly connected to the top of the base plate 13 between the fixing block 41 and the positioning sleeve 42, a short restraint belt 44 is fixedly connected to one side of the fixing block 41, and the other end of the short restraint belt 44 passes through the lower pressure frame 43 and the positioning sleeve 42 in sequence, and the top thread of the positioning sleeve 42 passes through a first fastening bolt 45 for tightening and fixing the short restraint belt 44.

The thigh restraint structure 3 includes a winding box 31 fixedly connected to a corner of the bottom front side of the seat plate 11 and a winding restraint belt 33 wound up by a winding shaft 32 inside the winding box. A notch 16 is also provided in the middle of the front side of the seat plate 11 for passing the winding restraint belt 33 and guiding its trajectory. The other end of the winding restraint belt 33 passes through the top of the front side of the seat plate 11 and is hooked on a T-shaped hanging shaft at the other corner of the bottom front side of the seat plate 11, and the other end of the winding restraint belt 33 is provided with a metal ring 34 adapted to the T-shaped hanging shaft. The T-shaped hanging shaft is a common structure and is not described in detail. A rear cover 35 is installed on the rear side of the winding box 31, and a spring box 36 is fixedly connected to the rear side of the rear cover 35. The driving shaft of the spring box 36 passes through the rear cover 35 and is connected to the winding shaft 32. The top thread of the outlet of the winding box 31 passes through a second fastening bolt 37 for tightening the winding restraint belt 33.

The instep restraint structure 4 can be adjusted according to different subjects. The winding restraint belt 33 is relatively long and can also adapt to the thighs of subjects of different body shapes and thicknesses. It has strong adaptability. By setting a winding box 31 to wind up the relatively long winding restraint belt 33, it can be avoided that it is scattered randomly. The setting of the spring box 36 is convenient for pulling and tightening the winding restraint belt 33 on the one hand, and on the other hand, it is also convenient for pulling out the winding restraint belt 33, and it is convenient to fix it with the T-shaped hanging shaft and the second fastening bolt 37.

This device is only used as an aid, and the electrode patches for specific tests are additionally attached to the skin.

Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

The sitting test includes the following test items:

Exercise 1: Tibialis Anterior MVC

Key points: Sit upright on the seat 1, bend the knee joint 90 degrees, place the feet flat on the bottom plate 13, and hook the instep with force.

Exercise 2: Hamstring MVC

Key points: Sit upright on a chair, bend your knees 90°, place your feet flat on the ground, and hook your knees hard.

Exercise 3: Quadriceps MVC

Key points: Sit upright on a chair, bend your knees 90°, place your feet flat on the ground, and stretch your knees forcefully.

Precautions:

1. Keep your back close to the chair back;

2. Fold your arms across your chest;

3. Maintain the knee joint at 90°;

4. Maintain the hip joint at 90 degrees to avoid extension of the hip joint due to forceful pushing of the opposite lower limb against the ground.

When performing the above-mentioned sitting posture test, let the subject sit on the seat 1, loosen the short restraint belt 44, insert the foot under the short restraint belt 44 and tighten the left end of the short restraint belt 44, press the instep, and then tighten the first fastening bolt 45 to fix the short restraint belt 44;

Then pull out the retracted restraint belt 33 to pass around the thigh and the front notch 16, and then go around the right front corner of the seat plate 11 to the bottom and put it on the T-shaped shaft to bind the thigh, and then tighten the second fastening bolt 37 to fix the retracted restraint belt 33;

Then the bottom ends of the two long restraint belts 21 are passed around the two side turning frames 14 and hooked to each other at the front side of the calf using the hooks 24, and then the long restraint belts 21 are tightened to press the calf;

Finally, the long restraint belt 21 is passed through the notch 16 as shown in FIG. 1 , and the top end is passed down from the top of the backrest and crossed on the chest of the subject, and then the buckle 22 is hooked on the appropriate hanging ring 23 to adjust the tightness, and the upper body is tied to the backrest of the seat board 11;

The stance test includes the following test items:

Exercise 4: Gastrocnemius MVC

Key points: Stand with your hands hanging naturally on both sides of your body, stand on tiptoe of the test leg, lift the other leg off the ground, keep your shoulders pressed down, and the subject lifts his heels up and pushes his body upward.

Precautions:

1. Do not use your hands to gain leverage;

2. Don’t shrug your shoulders.

When performing the above-mentioned standing test, the hooks 24 at both ends of the long restraint belt 21 are separated, and then the long restraint belt 21 is pulled out, and the hooks 24 are hooked on the bottom ring 15, and the long restraint belt 21 is tightened to pass from the back of the subject around the shoulders to the front side, and the buckle 22 is used to hang it on a suitable hanging ring 23 to press the shoulders down.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. A surface electromyography-assisted test assembly under maximum isometric voluntary contraction conditions, comprising a seat for assisting a subject to perform sitting posture detection, and a main restraint structure attached to the seat, characterized in that: the seat comprises a seat plate with a backrest, the bottom of the seat plate is fixedly connected to a bottom box, and the bottom of the bottom box is fixedly connected to a bottom plate, a thigh restraint structure for restraining the thigh is arranged on the front side of the seat plate, and an instep restraint structure for restraining the foot is arranged on the top of the bottom plate and located on the front side of the bottom box; The main restraint structure is attached to the seat board and the bottom box for installation during the sitting posture test, and is used to restrain the subject's upper body to the seat board backrest and the subject's calf to the front side of the bottom box; The bottom end of the main restraint structure is hooked on the bottom plate when performing standing posture detection, and the main restraint structure is used to press down the shoulders of the subject; The main restraint structure includes a long restraint belt, one end of which is provided with a hanging buckle, and the middle section of the long restraint belt is evenly spaced with a number of hanging rings adapted to the hanging buckle, the other end of the long restraint belt is rotatably connected to a hook, and the left and right sides of the front side of the bottom box are fixedly connected to a turning frame, and the other ends of the two long restraint belts pass through the turning frame and turn to the middle to be hooked and connected to each other through hooks to bind the calves, and the left and right sides of the seat plate are provided with multiple groups of notches for passing the long restraint belts and guiding their trajectories. When the two groups of long restraint belts restrain the upper body of the subject, they cross in front of the chest and are hung on each other's hanging rings through the hanging buckles. The left and right sides of the front side of the top of the bottom plate are fixedly connected to the bottom ring, and when performing standing posture detection, the hanging buckle at one end of the long restraint belt is hung on the corresponding hanging ring, and the other end of the long restraint belt is hung on the bottom ring through the hook. 2. A surface electromyography-assisted testing component under maximum isometric voluntary contraction conditions according to claim 1, characterized in that: the instep restraint structure includes a fixed block and a positioning sleeve fixedly connected to the top of the base plate and located on both sides of the front side of the base box, and a lower pressure frame is fixedly connected to the top of the base plate between the fixed block and the positioning sleeve, a short constraint belt is fixedly connected to one side of the fixed block, the other end of the short constraint belt passes through the lower pressure frame and the positioning sleeve in sequence, and the top thread of the positioning sleeve passes through a first fastening bolt that presses and fixes the short constraint belt. 3. A surface electromyography-assisted testing component under maximum isometric voluntary contraction conditions according to claim 1, characterized in that: the thigh restraint structure includes a winding box fixedly connected to one corner of the front bottom of the seat board and a winding restraint belt inside it that is wound up by a winding shaft, and a notch is also provided in the middle of the front side of the seat board for passing the winding restraint belt and guiding its trajectory, the other end of the winding restraint belt passes through the top of the front side of the seat board and is hooked on the T-shaped hanging shaft at the other corner of the front bottom of the seat board, and the other end of the winding restraint belt is provided with a metal ring that is compatible with the T-shaped hanging shaft. 4. A surface electromyography-assisted testing component under maximum isometric voluntary contraction conditions according to claim 3, characterized in that a rear cover is installed on the rear side of the winding box, and a spring box is fixedly connected to the rear side of the rear cover, the driving shaft of the spring box passes through the rear cover and is connected to the winding shaft, and the top thread of the winding box outlet passes through a second fastening bolt for tightening the winding restraint belt.