Massage air bag air valve and upper limb exercise device for assisting severe child patient

Abstract

The invention discloses a massage air bag air valve which comprises an air cylinder, a piston, a spring and an adjustable end cover. The piston is arranged in the air cylinder and slidably connected with the inner wall of the air cylinder, the adjustable end cover is fixedly connected with the rear end of the piston, and the spring is arranged between the piston and the adjustable end cover. A limiting ring is arranged in the air cylinder close to the front end, the piston is in sealing connection with the limiting ring when making contact with the limiting ring, an air channel is formed in the air cylinder, and when the piston slides, the air channel communicates with the front end and the rear end of the air cylinder. The piston comprises a first piston body and a second piston body, the second piston body protruding outwards is arranged in the middle of the first piston body, a plurality of through holes are evenly distributed in the second piston body in the circumferential direction, the through holes are sleeved with rubber rings, and the through holes are communicated with the rear end of the piston. The piston can ensure that the front-end gas pressure is larger than or equal to the rear-end gas pressure, the pressure of the air bag set can be increased from the telecentric end to the proximal end in sequence, blood is promoted to flow back to the heart, and thrombus is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and particularly to a massage air bag air valve and an upper limb exercise device for assisting critically ill children. BACKGROUND

[0002] The central venous catheter or medium-length catheter is widely used in the rescue and treatment of critically ill children due to its advantages of simple puncture, low risk of infection, long indwelling time, etc. However, after the catheter is placed, due to the damage of the vascular intima and the slowing down of the blood flow, some children will develop catheter-related thrombosis, which not only causes swelling and pain in the limb of the child on the catheter side, but also may lead to early catheter removal and treatment interruption due to thrombolysis failure, and even cause pulmonary embolism and endanger the life safety of the child. At present, the upper limb function exercise methods such as self-gripping, ball-gripping or hand function exercise of children are often used in clinical practice, and the pressure generated by muscle group activity on the blood vessels is used to increase the venous blood flow rate of the upper limb on the catheter side, so as to reduce the incidence of catheter-related thrombosis. However, in clinical practice, it is found that many critically ill children are in a coma, have weak limbs, and are not conscious, etc., and cannot cooperate with the function exercise, which leads to a sharp increase in the risk of catheter-related thrombosis.

[0003] A limb anti-thrombus device with progressive massage is disclosed in Chinese Patent No. CN208525366U, which comprises a flexible base for wrapping the limb, a strip-shaped air bag, a main machine, an oxygen saturation probe, and a pressure sensor for detecting the internal pressure of the strip-shaped air bag. The strip-shaped air bag is installed on the base, and there are at least two strip-shaped air bags arranged side by side, with the arrangement direction of the strip-shaped air bags being perpendicular to the wrapping direction of the flexible base. The main machine comprises a microcontroller, a micro air pump, frequency setting keys, pressure setting keys, time setting keys, and a display screen. The strip-shaped air bag is connected to the micro air pump through an air pipe, and there is an electromagnetic valve A on the air pipe. The strip-shaped air bag has a gas release valve, and the pressure sensor is arranged on the strip-shaped air bag or the air pipe.

[0004] However, in order to achieve the progressive massage effect and drive the blood to flow from the distal end to the proximal end, the air bag needs to be relatively small, i.e. a large number of air bags are needed, and a number of electromagnetic valves and air pipes matching the number of strip-shaped air bags are needed. When the number of strip-shaped air bags is large, there is no space to install the electromagnetic valves and air pipes matching the number of air bags. Moreover, the electromagnetic valves are expensive, and the manufacturing cost is high using the above technical solution. In addition, the fist exercise cannot be performed, resulting in unsatisfactory anti-thrombus effect. SUMMARY

[0005] The present application provides a massage air bag air valve and an upper limb exercise device for assisting critically ill children to solve the problems in the prior art.

[0006] To solve the above technical problems, the present application adopts the following technical solutions: The massage air bag air valve comprises a cylinder, a piston, an elastic member and an adjustable end cover; the piston is arranged in the cylinder and is in sliding connection with the inner wall of the cylinder; the adjustable end cover is fixedly connected with the rear end of the piston; and the elastic member is arranged between the piston and the adjustable end cover and is used for providing elastic force to balance the gas pressure received by the front end of the piston and the reset force of the piston. A limiting ring is arranged in the cylinder near the front end; the piston can abut against the limiting ring under the driving of the elastic member; the piston is in sealing connection with the limiting ring when the piston is in contact with the limiting ring; and an air passage is arranged in the cylinder and is in communication with the front end and the rear end of the cylinder when the piston slides. The piston is a hollow structure with a longitudinal section in a "convex" shape; the tail of the piston is a first piston body in sliding connection with the inner wall of the cylinder; the first piston body is annular and has a first end cover in closed connection with the front end; the middle part of the first end cover is provided with a second piston body protruding outward; the second piston body is annular and has a second end cover in closed connection with the front end; a ring groove is formed in the periphery of the second piston body; an elastic sealing ring is arranged on the ring groove; a plurality of through holes are uniformly distributed in the periphery of the ring groove and are in communication with the rear end of the piston.

[0007] Preferably, the elastic member is a spring, and the central axis of the spring is arranged in coincidence with the central axis of the cylinder; and the elastic sealing ring is a rubber ring.

[0008] Preferably, the cylinder comprises a cylinder body, and the cross section of the cylinder body is annular; the air passage comprises a plurality of air passage grooves arranged on the inner wall of the cylinder body and extending from the rear end of the cylinder body to the rear end of the limiting ring.

[0009] Preferably, the rear end of the cylinder body is provided with a plurality of sliding grooves extending along the central axis of the cylinder to the front end; the outer wall of the cylinder body is provided with a plurality of positioning holes in communication with the sliding grooves at positions corresponding to the sliding grooves; and the plurality of positioning holes are arranged along the central axis of the cylinder. The adjustable end cover comprises a third end cover in the shape of a cake, and the outer ring of the third end cover is provided with a plurality of rectangular elastic pieces extending along the central axis of the third end cover; the elastic pieces are in sliding connection with the sliding grooves; a plurality of outwardly protruding sub-bullet-shaped adjusting buttons are uniformly arranged along the length direction of the elastic pieces; and the adjusting buttons are in contact connection with the positioning holes.

[0010] Preferably, the device for assisting upper limb exercise of a critically ill child comprises a gas source assembly, an arm exercise assembly and a finger exercise assembly; the gas source assembly is in communication with the arm exercise assembly and the finger exercise assembly; the arm exercise assembly comprises a plurality of air bags; adjacent air bags are in communication with each other; adjacent air bags are inflated from right air bags to left air bags; an air valve for the air bags is fixedly connected at the position where the air bags are in communication with each other; the inner wall of the air bag is sealingly sleeved on the outer wall of the front end of the air valve; and the front end of the air valve faces the direction of inflation of the gas source assembly.

[0011] Preferably, the arm exercise assembly comprises a rectangular cuff, the air bag is a dry semi-cylindrical air bag, a plurality of the semi-cylindrical air bags are arranged in a linear array from right to left on the cuff, adjacent semi-cylindrical air bags are communicated through U-shaped communication pipes arranged staggeredly from top to bottom from right to left, and the massage air bag air valve is arranged in the semi-cylindrical air bag close to the air inlet of the U-shaped communication pipe; first fixing members are arranged at the upper and lower edges of the cuff respectively for fixing the cuff on the arm of the patient.

[0012] Preferably, the first fixing member is a Velcro comprising a Velcro rough surface arranged at the lower edge of the front surface of the cuff and a Velcro hook surface arranged at the upper edge of the back surface of the cuff.

[0013] Preferably, the air source assembly comprises an air pump main machine, a three-way joint is connected to the air outlet of the air pump main machine, a first air pipe is connected to the left air outlet of the three-way joint and communicated with the arm exercise assembly, and a first electromagnetic valve is connected to the middle of the first air pipe; a second air pipe is connected to the right air outlet of the three-way joint and communicated with the finger exercise assembly, and a second electromagnetic valve is connected to the middle of the second air pipe.

[0014] Preferably, the arm exercise assembly comprises a ball, the ball can be enlarged or reduced in volume by charging or discharging air, the surface of the ball is provided with a palm placing part adapted to the human palm and not scalable, and a second fixing member for fixing the palm on the palm placing part is arranged on the palm placing part.

[0015] Preferably, the second fixing member is a Velcro.

[0016] The beneficial effects of the present application are as follows: 1. The piston, the cylinder, the spring and the adjustable end cover cooperate, the spring is used for balancing the gas pressure received by the front end of the piston, so that the massage air bag air valve can ensure that the front end air bag maintains a preset pressure, and at the same time, the rear end air bag can be inflated, so that the air bags are inflated in turn; a plurality of piston rear end communication through holes are uniformly distributed on the circumference of the second piston body of the piston, a rubber ring is arranged outside the through hole, when the rear end pressure is greater than the front end pressure, the gas can flow to the front end through the through hole, ensuring that the right air bag pressure is greater than or equal to the left air bag pressure.

[0017] 2. By arranging the palm placing part which is not easy to elastically deform on the ball, the palm can be fixed firmly on the palm placing part during the zooming process of the ball; the ball can be enlarged or reduced in volume by charging or discharging air, driving the palm to stretch and clench the fist, thereby driving the palm muscle to move, and the air bag exerts pressure on the arm muscle, the pressure on the blood vessels increases the venous blood flow rate by means of the muscle group movement, thereby reducing the incidence of catheter-related thrombosis.

[0018] 3. The airbag assembly consists of multiple parallel airbags, which are inflated sequentially from the distal end to the proximal end, promoting blood flow from the distal end to the proximal end. The distal end airbag can maintain pressure to prevent blood from flowing to the distal end, ensuring that blood flows back from the distal end to the proximal end.

[0019] 4. By setting a rectangular spring, a spring sheet, and a bullet-shaped adjustment button on the outer ring of the adjustable end cap, the compression stroke of the spring can be adjusted to adjust different preset pressures, making it suitable for patients of different ages and improving the applicability of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the front end of the air valve of the massage airbag in this invention; Figure 2 This is a three-dimensional structural diagram of the rear end of the massage airbag air valve in this invention; Figure 3 This is a schematic diagram of the explosion of the air valve of the massage airbag in this invention; Figure 4 This is a three-dimensional structural diagram of the cylinder front end in this invention; Figure 5 This is a three-dimensional structural diagram of the rear end of the cylinder in this invention; Figure 6 This is a three-dimensional structural diagram of the piston front end in this invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the piston front end in this invention (with the rubber ring hidden). Figure 8 This is a three-dimensional structural diagram of the piston rear end in this invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the adjustable end cap in this invention; Figure 10 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the sphere in its reduced state in this invention. The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1 , Figure 2 and Figure 3As shown in the figure, the massage air bag air valve comprises a cylinder 221, a piston 222, an elastic member and an adjustable end cover 223, the piston 222 is arranged in the cylinder 221 and is in sliding connection with the inner wall of the cylinder 221, the adjustable end cover 223 is fixedly connected with the rear end of the piston 222, and the elastic member is arranged between the piston 222 and the adjustable end cover 223 and is used for providing an elastic force to make the piston 222 abut against a limiting member.

[0023] In the embodiment, the elastic member comprises a spring 224, and the central axis of the spring 224 is arranged in coincidence with the central axis of the cylinder 221.

[0024] As shown in the figure, Figure 4 , Figure 5 the cylinder 221 comprises a cylinder body 2211, the cross section of the cylinder body 2211 is annular, a limiting ring 2214 is arranged on the inner wall of the cylinder body 2211 close to the front end, the limiting ring 2214 is made of rubber material with good sealing property, and the piston 222 is in sealing connection with the limiting ring 2214 when the piston 222 is in contact with the limiting ring 2214; a plurality of annular fixing grooves 2213 are arranged on the outer wall of the cylinder body 2211 close to the front end, the cylinder body 2211 is provided with an air passage, and the air passage is in communication with the front end and the rear end of the cylinder 221 when the piston 222 slides to the rear end thereof, in the embodiment, the air passage comprises that the cylinder body 2211 is provided with a plurality of air passage grooves 2215, the air passage grooves 2215 extend from the rear end of the cylinder body 2211 to the rear end of the limiting ring 2214, a plurality of sliding grooves 2216 are arranged in the middle of the annular wall of the rear end of the cylinder body 2211 and extend to the front end along the central axis of the cylinder 221, a plurality of positioning holes 2212 are arranged on the outer wall of the cylinder body 2211 and are in communication with the sliding grooves 2216, and the plurality of positioning holes 2212 are arranged along the central axis of the cylinder 221.

[0025] As shown in the figure, Figure 6 , Figure 7 and Figure 8 , the piston 222 is a hollow structure with a longitudinal cross section in the shape of “convex”, the tail of the piston 222 is a first piston body 2221 in sliding connection with the inner wall of the cylinder 221, the first piston body 2221 is annular and is in closed connection with a first end cover 2222 at the front end, a second piston body 2224 is arranged on the middle part of the first end cover 2222 and protrudes outward, the second piston body 2224 is annular and is in closed connection with a second end cover 2225 at the front end, a ring groove 2223 is arranged on the second piston body 2224 in the circumferential direction, and an elastic sealing ring is arranged on the ring groove 2223, in the embodiment, the elastic sealing ring is a rubber ring 2227, a plurality of through holes 2226 are uniformly arranged on the ring groove 2223 in the circumferential direction, and the through holes 2226 are in communication with the rear end of the piston 222.

[0026] As shown in the figure, Figure 9As shown, the adjustable end cover 223 includes a pie-shaped third end cover 2231, and a plurality of rectangular elastic sheets 2232 are arranged on the outer ring of the third end cover 2231 and extend along the central axis direction of the third end cover 2231, the elastic sheets 2232 are in sliding connection with the sliding groove 2126, and a plurality of outwardly protruding bullet-shaped adjusting buttons 2233 are uniformly arranged on the elastic sheets 2232 along the length direction of the elastic sheets 2232, and the adjusting buttons 2233 are in contact connection with the positioning holes 2212.

[0027] As shown, Figure 1 , Figure 8 When it is necessary to adjust the pressure, the adjusting buttons 2233 on the elastic sheets 2232 are pressed at the same time, the elastic sheets 2232 are elastically deformed in the sliding groove 2126 and towards the central axis direction of the end cover 223, the arc surface of the adjusting button 2233 is in contact with the positioning hole 2212, under the pushing of the spring 224, the adjustable end cover 223 moves towards the rear end of the piston 222, and then the spring 224 is elongated, so that the elastic force of the spring 224 acting on the piston 222 is reduced.

[0028] As shown, Figure 10 The device for assisting upper limb exercise of a severe child patient comprises an air source assembly 1, an arm exercise assembly 2 and a finger exercise assembly 3, and the air source assembly 1 is in communication with the arm exercise assembly 2 and the finger exercise assembly 3 respectively.

[0029] The air source assembly 1 comprises an air pump main machine 14, and a three-way joint 13 is connected to the air outlet of the air pump main machine 14, the left air outlet of the three-way joint 13 is in communication with the arm exercise assembly 2 through a first air pipe 11, and a first electromagnetic valve 12 is connected to the middle of the first air pipe 11; the right air outlet of the three-way joint 13 is in communication with the finger exercise assembly 3 through a second air pipe 16, and a second electromagnetic valve 15 is connected to the middle of the second air pipe 16.

[0030] The arm exercise assembly 2 comprises a rectangular sleeve 23, and a plurality of air bags are arranged on the front surface of the sleeve 23 from right to left, adjacent air bags are in communication with each other, the first air pipe 11 is in communication with the rightmost air bag, adjacent air bags are inflated from right to left through the right air bag, and a massage air bag air valve 22 is connected to the communication position of the air bags. In the embodiment, a plurality of semicylindrical air bags 24 are linearly arranged on the sleeve 23 from right to left, adjacent semicylindrical air bags 24 are in communication through U-shaped communication pipes 26, the U-shaped communication pipes 26 are staggered from top to bottom from right to left, and the massage air bag air valve 22 is arranged at the position close to the air inlet of the U-shaped communication pipe 26 in the semicylindrical air bag 24; first fixing members are arranged at the upper and lower edges of the sleeve 23 respectively, and are used for fixing the sleeve 23 on the arm of the patient, and in the embodiment, the first fixing member is a sleeve magic tape, the magic tape nap surface 25 is arranged at the lower edge of the front surface of the sleeve 23, and the magic tape hook surface 21 is arranged at the upper edge of the back surface of the sleeve 23.

[0031] The air bag arrangement mode is not limited to the Figure 10The air bags can also be arranged in a slanting series, and after being adhered by the magic tapes on both sides, the whole air bags are arranged in a spiral ascending mode, and after being pressurized, the pressure can be transmitted from the distal end to the proximal end, and the requirement of the stepwise pressurization is met.

[0032] As shown in Figure 10 , Figure 11 , the arm exercising assembly 2 comprises a ball 31, the volume of the ball 31 can be enlarged or reduced by being filled with air or being discharged, the surface of the ball 31 is provided with a palm placing part 32 which is adapted to the palm of a human body and cannot be scaled, and the palm placing part 32 is provided with a second fixing part for fixing the palm on the palm placing part 32, in the embodiment, the second fixing part comprises a magic tape 33, the magic tape 33 comprises a rough surface and a hook surface, and the magic tape 33 is arranged on the five fingers and the wrist of the palm placing part 32 respectively, and is used for fixing the palm on the palm placing part 32.

[0033] The working principle of the present application is as follows: When being inflated, as shown in Figure 1 , Figure 6 and Figure 7 , the pressure of the gas acts on the first end cover 2222 and the second end cover 2225, when the pressure of the gas acting on the first end cover 2222 and the second end cover 2225 is greater than the elastic force of the spring 224, the air pushes the piston 222 to move along the inner wall of the cylinder 221 to the rear end thereof, as shown in Figure 5 , when the front end of the piston 222 moves to the end face of the air passage 2215, at this time, the gas pressure reaches the preset air bag massage pressure, and the gas starts to be filled into the downstream air bag through the air passage 2215; since the pressure acting on the outer side of the rubber ring 2227 is greater than the pressure acting on the inner side of the rubber ring 2227, the rubber ring 2227 is tightly attached in the ring groove 2223 and seals the through hole 2226, so as to ensure the sealing of the front end of the piston 222, and the upstream air bag can be stably ensured at the preset massage pressure.

[0034] When being deflated, the gas is discharged from the right air bag, and the pressure in the air bag adjacent to the right air bag is greater than the pressure in the right air bag, under the action of the spring 224 and the pressure of the gas, the piston 222 moves along the inner wall of the cylinder 221 to the front end thereof, the piston 222 abuts against the limiting ring 2214 and keeps sealing, the pressure acting on the inner side of the rubber ring 2227 is greater than the pressure acting on the outer side of the rubber ring 2227, the rubber ring 2227 starts to deform and is no longer tightly attached in the ring groove 2223, at this time, the gas is discharged to the front end of the piston 222 through the through hole 2226.

[0035] When exercising, firstly, the cuff 23 is attached to the arm of the patient, and then the cuff 23 is fixed on the arm of the patient by the Velcro 25 and the Velcro 21, and the palm of the patient is fixed on the palm placing part 32 by the Velcro 33; then, the air pump host 14 is operated to start the built-in air pump, and the built-in controller of the air pump host 14 controls the first electromagnetic valve 12 to be closed and the second electromagnetic valve 15 to be opened, air is filled into the sphere 31 through the second air pipe 16, and the hand of the patient starts to stretch along with the expansion of the sphere 31, when reaching the preset volume, the built-in controller of the air pump host 14 controls the second electromagnetic valve 15 to open the exhaust hole to deflate the sphere 31, and the hand of the patient makes a fist along with the deflation of the sphere; next, the built-in controller of the air pump host 14 controls the first electromagnetic valve 12 to be opened and the second electromagnetic valve 15 to be closed, and the air pump host 14 inflates the rightmost air bag through the first air pipe 11, when the pressure in the rightmost air bag reaches the preset pressure, the massage air bag air valve 22 is opened to inflate the air bag next to the left, and the above process is repeated until the pressure of all the air bags reaches the preset pressure; finally, the built-in controller of the air pump host 14 controls the exhaust hole of the first electromagnetic valve 12 to be opened to deflate the rightmost air bag, and the air bag next to the left starts to deflate through the massage air bag air valve 22, until the pressure of the leftmost air bag decreases to the atmospheric pressure.

[0036] The air pump host 14 is a prior art, including a control screen, an air pump and a controller (not shown in the figure), which are irrelevant to the present application, and will not be described here.

[0037] The above examples are only used to illustrate but not to limit the technical solutions of the present application, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the present application can still be modified or equivalently replaced without departing from the spirit and scope of the present application, any modification or partial replacement should be covered in the scope of the claims of the present application.

[0038] If the terms "first", "second" and the like are used herein to define parts, those skilled in the art should know that "first", "second" are used only for the convenience of describing the present application and simplifying the description, and the above terms have no special meaning unless otherwise stated.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, if the terms such as "mounting", "connecting", "connecting" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0040] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In the description of the present application, it should be noted that unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A massaging air bag air valve characterized by comprising: The device comprises a cylinder (221), a piston (222), an elastic member and an adjustable end cover (223); the piston (222) is arranged in the cylinder (221) and is in sliding connection with the inner wall of the cylinder (221), the adjustable end cover (223) is fixedly connected with the rear end of the piston (222), and the elastic member is arranged between the piston (222) and the adjustable end cover (223) and is used for providing an elastic force to balance the gas pressure on the front end of the piston (222) and the reset force of the piston (222); A limiting ring (2214) is arranged in the cylinder (221) near the front end, the piston (222) can abut against the limiting ring (2214) under the driving of the elastic member, and the piston (222) is in sealing connection with the limiting ring (2214) when the piston (222) contacts the limiting ring (2214); an air passage is arranged in the cylinder (221), and the air passage is communicated with the front end and the rear end of the cylinder (221) when the piston (222) slides; The piston (222) is a hollow structure with a "convex" longitudinal section, the tail of the piston (222) is a first piston body (2221) in sliding connection with the inner wall of the cylinder (221), the first piston body (2221) is annular and is closedly connected with a first end cover (2222) at the front end, a second piston body (2224) is arranged at the middle part of the first end cover (2222) and protrudes outward, the second piston body (2224) is annular and is closedly connected with a second end cover (2225) at the front end, a ring groove (2223) is formed in the circumferential direction of the second piston body (2224), an elastic sealing ring is arranged on the ring groove (2223), and a plurality of through holes (2226) are uniformly distributed in the circumferential direction of the ring groove (2223) and are communicated with the rear end of the piston (222).

2. The massaging air bag air valve according to claim 1, wherein The elastic member is a spring (224), and the central axis of the spring (224) is arranged in coincidence with the central axis of the cylinder (221); and the elastic sealing ring is a rubber ring (2227).

3. The massaging air bag air valve according to claim 1, wherein The cylinder (221) comprises a cylinder body (2211), the cross section of the cylinder body (2211) is annular, and the air passage comprises a plurality of air passages (2215) arranged on the inner wall of the cylinder body (2211) and extending from the rear end of the cylinder body (2211) to the rear end of the limiting ring (2214).

4. The massaging air bag air valve according to claim 3, wherein A plurality of sliding grooves (2216) are arranged in the middle of the annular wall of the rear end of the cylinder body (2211) and extend to the front end along the central axis of the cylinder (221), a plurality of positioning holes (2212) are formed in the outer wall of the cylinder body (2211) and are communicated with the sliding grooves (2216), and the plurality of positioning holes (2212) are arranged along the central axis of the cylinder (221); The adjustable end cover (223) comprises a pie-shaped third end cover (2231), and a plurality of rectangular elastic sheets (2232) are arranged on the outer ring of the third end cover (2231) and extend along the central axis direction of the third end cover (2231); the elastic sheets (2232) are in sliding connection with the sliding grooves (2126); a plurality of outwardly protruding bullet-shaped adjusting buttons (2233) are uniformly arranged on the elastic sheets (2232) along the length direction of the elastic sheets (2232); and the adjusting buttons (2233) are in contact connection with the positioning holes (2212).

5. The device for assisting upper limb exercise of severe children, comprising a gas source assembly (1), an arm exercise assembly (2) and a finger exercise assembly (3), the gas source assembly (1) is communicated with the arm exercise assembly (2) and the finger exercise assembly (3) respectively, the arm exercise assembly (2) comprises a plurality of air bags, characterized in that, The adjacent air bags are connected to each other, and the adjacent air bags are connected to each other through the inflation of the right air bag to the left air bag. The air bag is fixedly connected with the massage air bag air valve (22) of any one of claims 1-5 at the mutual connection position of the air bags. The inner wall of the air bag is sealingly sleeved on the outer wall of the front end of the massage air bag air valve (22), and the front end of the massage air bag air valve (22) faces the inflation direction of the air source assembly (1).

6. The device of claim 5, wherein the handle is configured to be held by the child's hand. The arm exercise assembly (2) comprises a rectangular sleeve (23), and the air bag is a dry semi-cylindrical air bag (24). A plurality of semi-cylindrical air bags (24) are arranged on the sleeve (23) in linear array from right to left. Adjacent semi-cylindrical air bags (24) are connected through U-shaped communication pipes (26). The U-shaped communication pipes (26) are arranged in staggered manner from top to bottom and from right to left. The massage air bag air valve (22) is arranged in the semi-cylindrical air bag (24) close to the air inlet of the U-shaped communication pipe (26). First fixing members are arranged at the upper and lower edges of the sleeve (23) respectively, and are used for fixing the sleeve (23) on the arm of a patient.

7. The device of claim 6, wherein the device further comprises a handle attached to the proximal end of the arm. The first fixing member comprises a Velcro rough surface (25) arranged at the lower edge of the front surface of the sleeve (23) and a Velcro hook surface (21) arranged at the upper edge of the back surface of the sleeve (23).

8. The device of claim 5, wherein the device further comprises a handle attached to the proximal end of the arm. The air source assembly (1) comprises an air pump main machine (14). A three-way pipe (13) is connected to the air outlet of the air pump main machine (14). The left air outlet of the three-way pipe (13) is connected to the arm exercise assembly (2) through a first air pipe (11). A first electromagnetic valve (12) is connected to the middle of the first air pipe (11). The right air outlet of the three-way pipe (13) is connected to the finger exercise assembly (3) through a second air pipe (16). A second electromagnetic valve (15) is connected to the middle of the second air pipe (16).

9. The device of claim 5, wherein the device further comprises a handle attached to the proximal end of the arm. The arm exercise assembly (2) comprises a spherical body (31). The spherical body (31) can be enlarged or reduced in volume by inflation or deflation. A palm placing part (32) adapted to the palm of a human hand and not scalable is arranged on the surface of the spherical body (31). A second fixing member is arranged on the palm placing part (32) to fix the palm on the palm placing part (32).

10. The device of claim 9, wherein the device further comprises a handle attached to the proximal end of the arm. The second fixing member is a Velcro (33).

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