Internal arteriovenous fistula functional exercise device based on air pressure change

Abstract

The invention belongs to the technical field of internal arteriovenous fistula function exercise, and particularly discloses an internal arteriovenous fistula function exercise device based on air pressure change, which comprises a bandage, an induction type reversing mechanism, an adjustable pressure relief mechanism and an air bag extrusion assembly, the air bag extrusion assembly is arranged on the bandage, the induction type reversing mechanism is arranged on the bandage, and the adjustable pressure relief mechanism is arranged on the air bag extrusion assembly. The air bag extrusion assembly comprises a transfer air chamber. Rotary reversing can be automatically carried out through the induction type reversing mechanism so as to switch the flowing direction of gas between the transfer gas chambers in the gas pump lug ring, and therefore the technical effect of automatically switching inflation and deflation is achieved under the condition that the gas pump works continuously. In addition, the invention further provides an adjustable pressure relief mechanism, and by arranging a mechanical pressure relief valve capable of adjusting the upper limit of air pressure, the problems that the air pressure rises continuously and the arm is extruded excessively due to the fact that electronic equipment breaks down or is blocked are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of arteriovenous fistula functional exercise, and specifically refers to an arteriovenous fistula functional exercise device based on air pressure change. Background Art

[0002] Patients undergoing hemodialysis need to perform long-term arteriovenous fistula functional exercises after surgery to promote the maturation of the arteriovenous fistula, reduce the occurrence of arteriovenous fistula complications, and extend the service life of the arteriovenous fistula; during the middle and late stages of home care, a common exercise method is to alternately squeeze and relax the arm through a strap wrapped around the arm.

[0003] However, for current exercise devices, the inflation and deflation times are preset to guide patients to exercise. However, this exercise mode cannot meet the exercise needs of different stages and different individuals. Even for the same individual, the exercise needs are different at the beginning of exercise and after exhaustion; if the program is still in the inflation stage after the patient relaxes their fist due to exhaustion, it may even cause damage to the patient. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention proposes an arteriovenous fistula functional exercise device that can sense the current fist-clenching and fist-relaxing states of the patient and automatically adjust the corresponding inflation and deflation modes; through an inductive commutation mechanism, this solution can automatically perform rotation and commutation to switch the flow direction of gas between the air pump and the intermediate air chamber, so as to achieve the technical effect of automatically switching inflation and deflation while the air pump is continuously working.

[0005] In addition, the present invention also proposes an adjustable pressure relief mechanism. By setting a mechanical pressure relief valve with an adjustable upper pressure limit, the problem of continuous pressure increase and excessive arm squeezing caused by electronic device failures or jams can be avoided.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes an arteriovenous fistula functional exercise device based on air pressure change, including a strap, an inductive commutation mechanism, an adjustable pressure relief mechanism, and an airbag extrusion assembly. The airbag extrusion assembly is arranged on the strap, the inductive commutation mechanism is arranged on the strap, and the airbag extrusion assembly includes an intermediate air chamber.

[0007] Further, one end of the strap is provided with a magic tape, the strap is also provided with a housing, the housing is provided with a screen, and the interior of the housing is also provided with a power supply module.

[0008] Preferably, a pressure sensor is also arranged on the inner side of the strap. Through the pressure difference of each pressure sensor, the wearing condition of the strap can be fed back.

[0009] Since the forearm of the human body is roughly conical, when the strap is worn, the pressures on the annular or sectorially arranged pressure sensors should be close. Therefore, the wearing condition of the strap can be feedback through the pressure difference of the pressure sensors.

[0010] Further, the inductive commutation mechanism includes a fist clenching induction component, a commutation valve component, and a telescopic commutation driving component. The fist clenching induction component is arranged on the strap, the commutation valve component is arranged on the strap, and the telescopic commutation driving component is arranged between the fist clenching induction component and the commutation valve component.

[0011] Through the inductive commutation mechanism, the corresponding inflation and deflation can be adaptively carried out by the patient's own fist clenching and loosening, so that the device has the function of free exercise.

[0012] Preferably, the fist clenching induction component includes a spherical airbag, a telescopic sleeve, a telescopic piston, and a return spring. The spherical airbag is communicated with the telescopic sleeve through a hose. The telescopic sleeve is arranged on the strap. The telescopic piston is snap-fitted and slidably arranged in the telescopic sleeve. The return spring is arranged between the telescopic sleeve and the telescopic piston.

[0013] There is a rotary seal contact between the fixed valve body and the rotary valve body. Through the rotation of the rotary valve body, the corresponding situation of the through holes of the fixed valve body and the rotary valve body can be switched, so as to control the inflation and deflation of the intermediate air chamber and the extrusion airbag.

[0014] As a further preference of the present invention, the commutation valve component includes a central shaft, a fixed valve body, and a rotary valve body. The central shaft is fixedly connected to the strap. The fixed valve body is fixedly connected to the central shaft. The rotary valve body is rotatably arranged on the central shaft. Two corresponding through holes are respectively arranged on the fixed valve body and the rotary valve body.

[0015] Preferably, the telescopic commutation driving component includes a gear ring and a rack. The gear ring is fixedly connected to the rotary valve body. The rack is fixedly connected to the telescopic piston. The gear ring and the rack are meshed and driven with each other.

[0016] Further, the adjustable pressure relief mechanism includes a valve body component and a pressure adjustment component. The valve body component is arranged on the intermediate air chamber. The pressure adjustment component is rotatably arranged on the valve body component.

[0017] A mechanical pressure relief valve for setting an adjustable air pressure upper limit is provided to avoid the problem of continuous air pressure rise and excessive squeezing of the arm caused by electronic equipment failure or jamming.

[0018] Preferably, the valve body component includes a pressure relief pipe, a valve seat, and a ball core. The pressure relief pipe is arranged on the intermediate air chamber. The valve seat is arranged in the pressure relief pipe. The ball core is matched with the valve seat.

[0019] As a further preference of the present invention, the pressure regulating assembly includes an adjusting handle and a preloading spring. The adjusting handle is threadedly connected to the pressure relief pipe. One end of the preloading spring is disposed on the adjusting handle, and the other end of the preloading spring contacts the ball core. The adjusting handle is also provided with an exhaust hole.

[0020] Further, the airbag squeezing assembly further includes an air pump and a squeezing airbag. The air pump is disposed on the strap, and the squeezing airbag is disposed on the strap. The transfer air chamber and the squeezing airbag are connected through. One of the through holes of the fixed valve body is connected to the transfer air chamber through a hose, and the through hole on the fixed valve body is connected to the air pump through a hose.

[0021] The beneficial effects achieved by the present invention with the above structure are as follows: (1) Since the forearm of the human body is generally conical, when the strap is worn, the pressures received by the annular or fan-shaped pressure sensors should be close. Therefore, the wearing condition of the strap can be feedback through the pressure difference of the pressure sensors.

[0022] (2) Through the inductive commutation mechanism, the corresponding inflation and deflation can be adaptively performed through the patient's own clenching and loosening of the fist, so that the device has the function of free exercise.

[0023] (3) The fixed valve body and the rotating valve body are in rotational sealing contact. By rotating the rotating valve body, the corresponding situation of the through holes of the fixed valve body and the rotating valve body can be switched, so as to control the inflation and deflation of the transfer air chamber and the squeezing airbag.

[0024] (4) A mechanical pressure relief valve with an adjustable air pressure upper limit is provided to avoid the problem of continuous air pressure rise and excessive squeezing of the arm caused by electronic device failures or lags. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of an arteriovenous fistula function exercise device based on air pressure change proposed by the present invention; Figure 2 is a front view of an arteriovenous fistula function exercise device based on air pressure change proposed by the present invention; Figure 3 is a top view of an arteriovenous fistula function exercise device based on air pressure change proposed by the present invention; Figure 4 is a bottom view of an arteriovenous fistula function exercise device based on air pressure change proposed by the present invention; Figure 5 is Figure 3 the cross-sectional view along the cutting line A-A in Figure 6 is Figure 5 the cross-sectional view along the cutting line B-B in Figure 7 is Figure 6 a sectional view along the cutting line C-C in Figure 8 an exploded structural schematic diagram of a arteriovenous fistula function exercise device based on air pressure change proposed by the present invention; Figure 9 is Figure 5 a partial enlarged view at position I in Figure 10 is Figure 6 a partial enlarged view at position II in Figure 11 is Figure 7 a partial enlarged view at position III in Figure 12 a schematic diagram of gas flow direction in the inflation mode.

[0026] Wherein, 1. strap, 2. inductive commutation mechanism, 3. adjustable pressure relief mechanism, 4. airbag extrusion assembly, 5. magic tape, 6. housing, 7. power supply module, 8. screen, 9. fist clenching induction component, 10. commutation valve assembly, 11. telescopic commutation drive assembly, 12. spherical airbag, 13. telescopic sleeve, 14. telescopic piston, 15. return spring, 16. central shaft, 17. fixed valve body, 18. rotating valve body, 19. gear ring, 20. rack, 21. valve body assembly, 22. pressure regulating component, 23. pressure relief pipe, 24. valve seat, 25. ball core, 26. adjusting handle, 27. preloading spring, 28. exhaust hole, 29. air pump, 30. transfer air chamber, 31. extrusion airbag, 32. pressure sensor.

[0027] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0030] As Figures 1 to 11 shown, the present invention provides a functional exercise device for arteriovenous fistula based on air pressure change, which includes a strap 1, an inductive commutation mechanism 2, an adjustable pressure relief mechanism 3 and an airbag extrusion assembly 4. The airbag extrusion assembly 4 is arranged on the strap 1, the inductive commutation mechanism 2 is arranged on the strap 1, and the airbag extrusion assembly 4 includes a transfer air chamber 30.

[0031] One end of the strap 1 is provided with a magic tape 5, and the strap 1 is also provided with a housing 6. The housing 6 is provided with a screen 8, and a power supply module 7 is also arranged inside the housing 6.

[0032] A pressure sensor 32 is also arranged on the inner side of the strap 1. Through the pressure difference of each pressure sensor 32, the wearing condition of the strap 1 can be fed back.

[0033] Since the forearm of the human body is approximately conical, when the strap 1 is worn, the pressures received by the annular or fan-shaped arranged pressure sensors 32 should be close. Therefore, the wearing condition of the strap 1 can be fed back through the pressure difference of the pressure sensors 32.

[0034] The inductive commutation mechanism 2 includes a fist clenching induction component 9, a commutation valve component 10 and a telescopic commutation driving component 11. The fist clenching induction component 9 is arranged on the strap 1, the commutation valve component 10 is arranged on the strap 1, and the telescopic commutation driving component 11 is arranged between the fist clenching induction component 9 and the commutation valve component 10.

[0035] Through the inductive commutation mechanism 2, the corresponding inflation and deflation can be adaptively performed through the patient's own fist clenching and loosening, so that the device has the function of free exercise.

[0036] The fist clenching induction component 9 includes a spherical airbag 12, a telescopic sleeve 13, a telescopic piston 14 and a return spring 15. The spherical airbag 12 is communicated with the telescopic sleeve 13 through a hose. The telescopic sleeve 13 is arranged on the strap 1. The telescopic piston 14 is clamped and slidably arranged in the telescopic sleeve 13. The return spring 15 is arranged between the telescopic sleeve 13 and the telescopic piston 14.

[0037] There is a rotary seal contact between the fixed valve body 17 and the rotary valve body 18. By rotating the rotary valve body 18, the corresponding situation of the through holes of the fixed valve body 17 and the rotary valve body 18 can be switched, so as to control the inflation and deflation of the transfer air chamber 30 and the extrusion airbag 31.

[0038] The reversing valve assembly 10 includes a central shaft 16, a fixed valve body 17 and a rotary valve body 18. The central shaft 16 is fixedly connected to the strap 1, the fixed valve body 17 is fixedly connected to the central shaft 16, the rotary valve body 18 is rotatably arranged on the central shaft 16, and two corresponding through holes are respectively arranged on the fixed valve body 17 and the rotary valve body 18.

[0039] The telescopic reversing drive assembly 11 includes a gear ring 19 and a rack 20. The gear ring 19 is fixedly connected to the rotary valve body 18, the rack 20 is fixedly connected to the telescopic piston 14, and the gear ring 19 and the rack 20 are in meshing transmission.

[0040] The adjustable pressure relief mechanism 3 includes a valve body assembly 21 and a pressure adjustment assembly 22. The valve body assembly 21 is arranged on the transfer air chamber 30, and the pressure adjustment assembly 22 is rotatably arranged on the valve body assembly 21.

[0041] A mechanical pressure relief valve with an adjustable air pressure upper limit is set to avoid the problems of continuous air pressure rise and excessive squeezing of the arm caused by electronic equipment failure or jamming.

[0042] The valve body assembly 21 includes a pressure relief pipe 23, a valve seat 24 and a ball core 25. The pressure relief pipe 23 is arranged on the transfer air chamber 30, the valve seat 24 is arranged in the pressure relief pipe 23, and the ball core 25 is matched with the valve seat 24.

[0043] The pressure adjustment assembly 22 includes an adjustment handle 26 and a preloading spring 27. The adjustment handle 26 is threadedly connected to the pressure relief pipe 23. One end of the preloading spring 27 is arranged on the adjustment handle 26, the other end of the preloading spring 27 contacts the ball core 25, and an exhaust hole 28 is also arranged on the adjustment handle 26.

[0044] The airbag extrusion assembly 4 further includes an air pump 29 and an extrusion airbag 31. The air pump 29 is arranged on the strap 1, the extrusion airbag 31 is arranged on the strap 1, the transfer air chamber 30 and the extrusion airbag 31 are connected through, and one of the through holes of the fixed valve body 17 is connected to the transfer air chamber 30 through a hose, and the through hole on the fixed valve body 17 is connected to the air pump 29 through a hose.

[0045] As Figure 12 shown, the arrow indicates the gas flow direction in the inflation mode. At this time, in the through holes of the fixed valve body 17 and the rotary valve body 18, a and b are connected, and c and d are connected; at this time, the air pump 29 extracts air from the outside and supplies it into the transfer air chamber 30; After the rotary valve body 18 rotates half a turn, a and d are connected, and c and b are connected; at this time, the air pump 29 still operates in the original mode, extracting air from the outside and supplying it into the transfer air chamber 30.

[0046] In specific use, first, the user needs to wrap the strap 1 around the patient's arm, and squeeze the airbag 31 provided on the inner side of the strap 1, that is, the airbag 31 is provided between the strap 1 and the human body; this device has two training modes: guided exercise and free exercise, which can be interactively selected on the screen 8. This device can be powered by a power cord or a battery, and the power on and off are controlled by long pressing the power button.

[0047] In the guided mode: after clicking "Start" on the screen 8, information such as the remaining exercise duration, deflation countdown, inflation countdown, etc. will be displayed on the screen 8, and when inflating, the user will be prompted to clench the fist through text and voice, and when deflating, the user will be prompted to loosen the fist through text and voice. The inflation and deflation duration, pressure peak value, and total exercise duration can be set internally by the program and also have a certain custom preset range. For example, the deflation countdown is 15s, the inflation countdown is 5s, and the exercise duration countdown is 20min.

[0048] In the free exercise mode: the patient holds the spherical airbag 12 in the hand, and then starts the air pump 29. When the patient clenches the fist, the spherical airbag 12 will be squeezed, and the air in the spherical airbag 12 will enter the telescopic sleeve 13 and push the telescopic piston 14. At this time, the rack 20 slides along with the telescopic piston 14, driving the gear ring 19 and the rotary valve body 18 to rotate half a turn. After the rotary valve body 18 rotates half a turn, the two through holes of the fixed valve body 17 and the rotary valve body 18 are alternately connected. At this time, the air pump 29 extracts air from the inside of the housing 6 and supplies it into the transfer air chamber 30 and the squeeze airbag 31. At this time, the internal air pressure of the squeeze airbag 31 increases, the squeezing force on the arm increases, and the exercise effect is achieved. When the patient loosens the fist, the gas in the telescopic sleeve 13 will flow back into the spherical airbag 12, and at the same time, the telescopic piston 14 resets. At this time, the rack 20 slides along with the telescopic piston 14, driving the gear ring 19 and the rotary valve body 18 to rotate half a turn in the reverse direction and reset. After the rotary valve body 18 resets, the two through holes of the fixed valve body 17 and the rotary valve body 18 are alternately connected again (reset). At this time, the air pump 29 extracts air from the inside of the transfer air chamber 30 and the squeeze airbag 31 and releases it into the housing 6. At this time, the internal air pressure of the squeeze airbag 31 decreases, the squeezing force on the arm decreases, and the relaxation effect is achieved.

[0049] As another new embodiment of the present invention, when extracting the gas in the transfer air chamber 30 and the extrusion airbag 31, the extreme state is to evacuate the extrusion airbag 31; when supplying gas to the transfer air chamber 30 and the extrusion airbag 31, when the thrust of the gas on the ball core 25 is sufficient to overcome the elastic force of the preloading spring 27, the ball core 25 will leave the valve seat 24. At this time, the air pressure value in the transfer air chamber 30 is the upper limit of the air pressure in the transfer air chamber 30 and the extrusion airbag 31; The adjustable pressure relief mechanism 3 can avoid the problems of continuous increase in air pressure and excessive extrusion of the arm caused by electronic device failures or jams.

[0050] By rotating the adjustment handle 26, the pre-compression amount of the preloading spring 27 can be adjusted, thereby adjusting the air pressure threshold when the ball core 25 leaves the valve seat 24, and thus adjusting the upper limit of the air pressure in the transfer air chamber 30.

[0051] It should be noted that in this article, relational terms such as first and second 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0052] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the spirit of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An arteriovenous fistula function training device based on air pressure changes, characterized in that: It comprises a binding belt (1), an inductive reversing mechanism (2) and an airbag extrusion assembly (4), wherein the airbag extrusion assembly (4) is arranged on the binding belt (1), the inductive reversing mechanism (2) is arranged on the binding belt (1), and the airbag extrusion assembly (4) comprises a transfer air chamber (30); The inductive reversing mechanism (2) comprises a fist-clenching sensing component (9), a reversing valve component (10) and a telescopic reversing drive component (11); the fist-clenching sensing component (9) is arranged on the binding belt (1); the reversing valve component (10) is arranged on the binding belt (1); and the telescopic reversing drive component (11) is arranged between the fist-clenching sensing component (9) and the reversing valve component (10).

2. The arteriovenous fistula function training device based on air pressure change according to claim 1, characterized in that: The fist-clenching sensing component (9) comprises a spherical airbag (12), a telescopic sleeve (13), a telescopic piston (14) and a return spring (15); the spherical airbag (12) is connected through a hose and the telescopic sleeve (13); the telescopic sleeve (13) is arranged on the strap (1); the telescopic piston (14) is slidably engaged in the telescopic sleeve (13); and the return spring (15) is arranged between the telescopic sleeve (13) and the telescopic piston (14).

3. The arteriovenous fistula function training device based on air pressure change according to claim 2, characterized in that: The reversing valve assembly (10) comprises a central shaft (16), a fixed valve body (17) and a rotating valve body (18); the central shaft (16) is fixedly connected to the binding belt (1); the fixed valve body (17) is fixedly connected to the central shaft (16); the rotating valve body (18) is rotatably arranged on the central shaft (16); and two corresponding through holes are respectively arranged on the fixed valve body (17) and the rotating valve body (18).

4. The arteriovenous fistula function training device based on air pressure change according to claim 3, characterized in that: The telescopic reversing drive assembly (11) comprises a gear ring (19) and a rack (20); the gear ring (19) is fixedly connected to the rotary valve body (18); the rack (20) is fixedly connected to the telescopic piston (14); the gear ring (19) and the rack (20) are meshed for transmission.

5. The arteriovenous fistula function training device based on air pressure change according to claim 1, characterized in that: It also includes an adjustable pressure relief mechanism (3), the adjustable pressure relief mechanism (3) including a valve body assembly (21) and a pressure regulating assembly (22), the valve body assembly (21) being arranged on the transfer air chamber (30), and the pressure regulating assembly (22) being rotatably arranged on the valve body assembly (21).

6. The arteriovenous fistula function training device based on air pressure change according to claim 5, characterized in that: The valve body assembly (21) comprises a pressure relief pipe (23), a valve seat (24) and a ball core (25); the pressure relief pipe (23) is arranged on the transfer air chamber (30); the valve seat (24) is arranged in the pressure relief pipe (23); and the ball core (25) and the valve seat (24) cooperate with each other.

7. The arteriovenous fistula function training device based on air pressure change according to claim 6, characterized in that: The pressure regulating assembly (22) comprises an adjusting handle (26) and a pre-compression spring (27); the adjusting handle (26) is threadedly connected to the pressure relief pipe (23); one end of the pre-compression spring (27) is disposed on the adjusting handle (26); the other end of the pre-compression spring (27) is in contact with the ball core (25); and an exhaust hole (28) is also disposed on the adjusting handle (26).

8. The arteriovenous fistula function training device based on air pressure change according to claim 4, characterized in that: The airbag extrusion assembly (4) further comprises an air pump (29) and an extrusion airbag (31); the air pump (29) is arranged on the binding strap (1); the extrusion airbag (31) is arranged on the binding strap (1); the transfer air chamber (30) and the extrusion airbag (31) are connected through each other; one of the through holes of the fixed valve body (17) is connected to the transfer air chamber (30) via a hose; and the through hole on the fixed valve body (17) is connected to the air pump (29) via a hose.

9. The arteriovenous fistula function training device based on air pressure change according to claim 1, characterized in that: A Velcro (5) is provided at one end of the binding strap (1), a shell (6) is also provided on the binding strap (1), a screen (8) is provided on the shell (6), and a power supply module (7) is also provided inside the shell (6).

10. The arteriovenous fistula function training device based on air pressure change according to claim 9, characterized in that: A pressure sensor (32) is also provided on the inner side of the bandage (1), and the wearing condition of the bandage (1) can be fed back through the pressure difference of each pressure sensor (32).

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