Dynamic and static balance evaluation training instrument

Abstract

The invention relates to the technical field of rehabilitation equipment, in particular to a dynamic and static balance evaluation training instrument which comprises a base, a balance plate and an air bag, the air bag is arranged to be in a circular drum shape and located between the balance plate and the base, and a plurality of annularly-formed stress grooves are formed in the outer side wall and the top of the air bag. The distance L2 between the stress grooves in the side wall of the air bag is larger than the distance L1 between the stress grooves in the top of the air bag. And the multiple balance supporting assemblies are located between the base and the balance plate, the multiple balance supporting assemblies are arranged on the periphery of the air bag in a surrounding mode, and the balance supporting assemblies can abut against the balance plate so as to adjust the distance between the balance plate and the base. The device comprises an air bag and a balance supporting assembly. Alternating use provides a dynamic standing mode and a passive standing mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rehabilitation equipment, and particularly relates to a dynamic and static balance evaluation training instrument. BACKGROUND

[0002] In recent years, with the aggravation of population aging trend, the popularity of unhealthy lifestyle and the frequent occurrence of traffic accidents, industrial injuries and other unexpected events, the number of patients with balance dysfunction caused by stroke, spinal injury or accident continues to rise. Balance dysfunction makes patients difficult to maintain a sitting and standing posture independently, and their independent walking and self-care ability is significantly limited, which seriously affects the subsequent functional rehabilitation process and quality of daily life. For such patients, in addition to drug and surgical treatment, physical therapy (i.e. rehabilitation training) is the key means to achieve the rehabilitation goal. However, the current balance rehabilitation training equipment is mostly single mode, and patients face the problems of monotonous form and lack of system in the training process, resulting in unsatisfactory rehabilitation effect. SUMMARY

[0003] The technical problem to be solved by the present application is that the existing balance instrument has a single function.

[0004] Therefore, the present application provides a dynamic and static balance evaluation training instrument.

[0005] The technical scheme adopted by the present application to solve the technical problem is: A dynamic and static balance evaluation training instrument, comprising, a base and a balance plate, an air bag, the air bag is arranged in a circular drum shape and located between the balance plate and the base, a plurality of stress grooves are arranged in a ring shape on the outer side wall and the top of the air bag, the spacing L2 between the plurality of stress grooves on the side wall of the air bag is greater than the spacing L1 between the plurality of stress grooves on the top of the air bag; a plurality of balance support assemblies, the balance support assemblies are located between the base and the balance plate, the plurality of balance support assemblies are arranged around the air bag, and the balance support assemblies can abut against the balance plate to adjust the spacing between the balance plate and the base.

[0006] Further, the outer side wall of the air bag is divided into a first expansion area and a second expansion area, the first expansion area is opposite to the balance plate, the first expansion area is provided with a first stress groove, the second expansion area is provided with a second stress groove, the width D2 of the second stress groove is greater than the width D1 of the first stress groove, and the width L2 of the reinforcing rib between adjacent second stress grooves is greater than the width L1 of the reinforcing rib between adjacent first stress grooves.

[0007] Further, the second expansion area is adjacent to the first expansion area, and the area of the mounting plate is defined as a transition area, and a third stress groove is arranged in the transition area, the width D2 of the second stress groove is greater than the width D3 of the third stress groove, and the width D3 of the third stress groove is greater than the width D1 of the first stress groove; the width L2 of the reinforcing rib between adjacent second stress grooves is greater than the width L3 of the reinforcing rib between adjacent third stress grooves, and the width L3 of the reinforcing rib between adjacent third stress grooves is greater than the width L1 of the reinforcing rib between adjacent first stress grooves.

[0008] Further, the air bag in the second expansion area is arranged in an arc shape, the overall arc length of the second expansion area is C, and the arc length of the reinforcing rib between adjacent second stress grooves is not more than 1 / 2C.

[0009] Further, the width of the first stress groove is 2-5mm, and the width of the reinforcing rib between adjacent first stress grooves is 3-5mm.

[0010] Further, a support is arranged on the base, an inner support cylinder for mounting the air bag is arranged on the support, and a sealing assembly is arranged between the inner support cylinder and the cavity.

[0011] Further, the sealing assembly comprises a limiting groove arranged at the bottom of the outer sidewall of the inner support cylinder, the sealing assembly comprises a bottom plate and a side plate, the bottom plate is arranged in an annular shape, the bottom plate is fixed on the support by screws, and the inner circle of the bottom plate is located in the limiting groove; the side plate is arranged in a cylindrical shape, the side plate is coaxially sleeved on the outer side of the inner support cylinder, a clamping portion is connected to the inner side of the bottom of the side plate, and the clamping portion is inserted into the limiting groove and located above the bottom plate.

[0012] Further, a ring groove is arranged at the bottom of the outer edge of the bottom plate, a first embedding groove is formed between the ring groove and the support, a press ring portion is connected to the outer edge of the top of the inner support cylinder, a second embedding groove is formed by spacing between the top of the side plate and the bottom surface of the press ring portion, the upper edge of the inner side of the air bag is inserted into the first embedding groove, and the lower edge is inserted into the second embedding groove.

[0013] Further, an annular safety strip is arranged on the part of the air bag inserted into the first embedding groove and the second embedding groove, and a groove corresponding to the annular safety strip is arranged on the inner sidewall of the first embedding groove and the second embedding groove.

[0014] Further, a positioning groove for limiting the outer edge of the side plate is arranged on the bottom plate.

[0015] The beneficial effect of the present application is that when the balance support assembly is not in contact with the balance plate, the balance plate is supported by the pressure in the air bag, the user can actively conduct balance training, which is a dynamic standing mode; when the balance support assembly is in contact with the balance plate, the balance plate is lifted horizontally by the balance support assembly, and then rotates according to the instructions sent by the upper computer, and the user keeps balance under the driving of the balance plate, which is a passive standing mode. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and examples.

[0017] Figure 1 is a structural schematic diagram of the dynamic and static balance evaluation training instrument in the present application.

[0018] Figure 2 is a structural schematic diagram of the functional mechanism in the present application.

[0019] Figure 3 is a structural schematic diagram of the air bag installation position in the present application.

[0020] Figure 4 is a structural schematic diagram of the air bag adjusting assembly in the present application.

[0021] Figure 5 is a structural schematic diagram of the air bag in the present application.

[0022] In the figure: 1, base; 11, support; 12, support pad; 13, mounting plate; 2, balance plate; 3, air bag adjusting assembly; 31, air bag; 311, first expansion area; 312, second expansion area; 313, transition area; 314, first stress groove; 315, second stress groove; 316, reinforcing rib; 317, safety bar; 318, third stress groove; 32, inner support cylinder; 321, limiting groove; 322, pressure ring part; 33, sealing assembly; 331, bottom plate; 332, side plate; 333, first embedding groove; 334, clamping part; 335, second embedding groove; 336, positioning groove; 4, balance support assembly; 41, nut; 42, lead screw; 43, support block; 44, mounting frame; 45, motor. DETAILED DESCRIPTION

[0023] The present application will now be further described in conjunction with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present application in a schematic manner, and therefore only show the components related to the present application.

[0024] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are 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 device or element 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. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the present application, it needs to be understood that unless otherwise explicitly specified 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.

[0026] A dynamic and static balance evaluation training instrument, comprising a shell and a functional mechanism, the functional mechanism is embedded in the shell, the functional mechanism comprises a base 1, a balance plate 2, an adjusting air bag 31 assembly 3, and a balance support assembly 4 surrounding the adjusting air bag 31 assembly 3, and the balance plate 2 is exposed to the shell. Specifically, the shell can also be provided with a handle, an operation screen and the like.

[0027] The base 1 is connected with a support 11, the adjusting air bag 31 assembly 3 is installed on the support 11, and the balance plate 2 is connected to the side of the adjusting air bag 31 assembly 3 away from the support 11. The balance support assembly 4 is provided with four, which are circumferentially arranged around the adjusting air bag 31 assembly 3 and located below the balance plate 2. The base 1 is connected with a mounting plate 13 through a support pad 12, the mounting plate 13 is parallel to the base 1, and each balance support assembly 4 comprises a mounting frame 44, a lead screw 42, a nut 41 and a support block 43.

[0028] The mounting frame 44 is fixedly connected to the mounting plate 13, the nut 41 is rotatably connected to the mounting frame 44, the axial direction of the nut 41 is vertically arranged, a transmission gear is coaxially connected to the nut 41, a motor 45 opposite to each balance support assembly 4 is connected to the mounting plate 13, the motor 45 is installed on the mounting plate 13 and located on the side of the mounting frame 44 close to the center of the mounting plate 13, the output shaft of the motor 45 is vertically upward, a driving gear is coaxially connected to the output shaft of the motor 45, and the driving gear and the transmission gear are driven by a belt. The lead screw is threadedly connected with the nut 41, the lead screw 42 is slidably connected with the mounting frame 44 in the vertical direction, so that when the nut 41 rotates, the lead screw 42 does not rotate, but only moves in the vertical direction. The support block 43 is connected to the top of the lead screw 42, the bottom of the support block 43 is connected with a base plate, the base plate is connected with a guide rod, the guide rod is inserted into the mounting frame 44 and slidably connected with the mounting frame 44 in the vertical direction, so as to avoid the rotation of the lead screw 42 and improve the stability of the movement of the support block 43. The top of the support block 43 is arc-shaped, so that the support block 43 and the balance plate 2 are in point contact.

[0029] The adjusting air bag 31 assembly 3 comprises the air bag 31, an inner support cylinder 32 and a sealing assembly 33. The inner support cylinder 32 is coaxially arranged with the balance plate 2, and the inner support cylinder 32 is fixedly connected with the support frame 11. The bottom of the outer side wall of the inner support cylinder 32 is provided with a limiting groove 321, and the outer edge of the top of the inner support cylinder 32 is integrally connected with a pressing ring part 322. The sealing assembly 33 comprises a bottom plate 331 and a side plate 332. The bottom plate 331 is annular, and is fixed on the support frame 11 by screws. The inner circle of the bottom plate 331 is located in the limiting groove 321, and the bottom of the outer edge is provided with an annular groove, forming a first embedding groove 333 between the annular groove and the support frame 11. The side plate 332 is cylindrical, and is coaxially sleeved on the outer side of the inner support cylinder 32. The inner side of the bottom of the side plate 332 is connected with a clamping part 334, which is inserted into the limiting groove 321 and located above the bottom plate 331. The top of the side plate 332 and the bottom surface of the pressing ring part 322 are spaced apart to form a second embedding groove 335. The bottom plate 331 is provided with a positioning groove 336 for limiting the outer edge of the side plate 332. The side plate 332 is clamped between the bottom plate 331 and the inner support cylinder 32. A sealing ring can be arranged between the bottom plate 331 and the side plate 332 to improve the sealing effect of the air bag 31.

[0030] The air bag 31 is wrapped outside the inner support cylinder 32. The upper edge of the inner side of the air bag 31 is inserted into the first embedding groove 333, and the lower edge is inserted into the second embedding groove 335. When the air bag 31 is inflated, the air bag 31 is in a round drum shape. The top of the air bag 31 abuts against the balance plate 2, and the inner support cylinder 32 is spaced apart from the balance plate 2.

[0031] Specifically, the part of the air bag 31 inserted into the first slot 333 and the second slot 335 is provided with an annular safety strip 317, and the inner side wall of the first slot 333 and the second slot 335 is provided with a groove corresponding to the annular safety strip 317, so that the annular safety strip is firmly bound in the groove and avoids bursting under working pressure. The annular safety strip 317 can be arranged on the inner side or the outer side of the air bag 31, or on both the inner side and the outer side of the air bag 31. When the inner side and the outer side of the air bag 31 are provided with annular safety strips 317, the annular safety strips 317 on the inner side and the outer side of the air bag 31 are staggered.

[0032] The main body of the air bag 31 is made of rubber material. When the air bag 31 increases the internal air pressure, it will produce extension deformation. Under the condition that the installation plate 13 gives a constant pressure to the rubber part, as the air pressure rises, the air bag 31 will produce extension deformation, causing the friction at the joint to decrease, and then as the pressure continues to rise, it will cause the joint to produce large extension deformation and burst. Therefore, the air bag 31 increases two annular safety strips with different outer diameters at the upper and lower joints, which cooperate with the grooves at the same position on the installation plate 13, so that the annular safety strips are firmly bound in the grooves and avoid bursting under working pressure.

[0033] It should be noted that the outer side wall of the air bag 31 is divided into a first expansion area 311 and a second expansion area 312. The first expansion area 311 is opposite to the balance plate 2, and the first expansion area 311 is provided with a first stress groove 314. The first stress groove 314 is arranged in a ring shape, and its cross section is arranged in a V shape, a U shape or a sun shape. The second expansion area 312 is provided with a second stress groove 315, and the second stress groove 315 is arranged in a ring shape, and its cross section is arranged in a V shape, a U shape or a sun shape. The V-shaped groove is beneficial to stress concentration, the U-shaped groove provides a smoother transition, and is suitable for scenes that need to be repeatedly expanded. The working pressure of the air bag 31 of the device is between 0~0.12Mpa, and it is repeatedly operated, so it is more suitable to adopt a U-shaped structure.

[0034] Taking the cross section in the XY plane as the reference surface, the distance between the midpoints of the side walls of the stress groove is the width of the stress groove. The first stress groove 314 in the first expansion area 311 of the air bag 31 adopts a groove with a width D1 of 2mm and a depth H1 of 1mm. The bottom and top corners of the first stress groove 314 are both transitioned by a circular arc with an R0 of 0.5mm. The distance between the adjacent first stress grooves 314 in the first expansion area 311 is L1, which is 3.5mm. The part between the adjacent stress grooves is the reinforcing rib 316 part. The tread reinforcing rib 316 is 3.5mm x 1mm, and the width of the reinforcing rib 316 between the adjacent first stress grooves 314 is L1.

[0035] The second expansion area 312 of the air bag 31 is in the shape of a circular arc, and the second stress groove 315 is in the shape of an angle U-shaped groove. Since the tread is not supported, the expansion is most obvious, and therefore the reinforcing rib 316 is divided into arcs. In this embodiment, the arc R2 between the midpoints of the opposite side walls of the second stress groove 315 (the arc of the second stress groove 315) is 4°, and the arc R1 of each reinforcing rib 316 part is 16°. The overall arc length of the second expansion area 312 is C, and the arc length of each reinforcing rib in the second expansion area 312 is not more than 1 / 2C. The depth of the second stress groove 315 is 1mm, which can minimize the expansion. The spacing between adjacent second stress grooves 315 is greater than the spacing between adjacent first stress grooves 314. Further, the area of the second expansion area 312 close to the first expansion area 311 and the mounting plate 13 defines a transition area 313, and the third stress groove 318 is provided in the transition area 313. The third stress groove 318 is divided into arcs, and the arc R3 of the third stress groove 318 is less than R2, R3 being 3°. The arc R4 of the reinforcing rib 316 part is less than R1, R4 being 7°. Overall, the width D2 of the second stress groove 315 is greater than the width D3 of the third stress groove 318, and the width D3 of the third stress groove 318 is greater than the width D1 of the first stress groove 314. The width L2 of the reinforcing rib 316 between adjacent second stress grooves 315 is greater than the width L3 of the reinforcing rib 316 between adjacent third stress grooves 318, and the width L3 of the reinforcing rib 316 between adjacent third stress grooves 318 is greater than the width L1 of the reinforcing rib 316 between adjacent first stress grooves 314.

[0036] The air bag 31 structure can be approximately regarded as a multi-layer composite wall structure. There is a 1mm thick composite wall with grooves in the radial direction, and there is also a similar 1mm thick composite wall in the axial plane, so that the axial and radial stiffness can be effectively increased to resist deformation. Further, the first stress groove 314 and the second stress groove 315 and the third stress groove 318 are provided with a silica gel-aramid fiber composite layer to improve tear resistance.

[0037] In this application, when the air bag 31 is under stress, the air pressure inside the air bag 31 is not uniformly dispersed to all directions, but is biased to one side, causing the air bag 31 to expand on one side. In general, in order to improve the stability of the air bag 31 structure, supports and reinforcements are provided at the connection between the bottom and the top. In this application, the air bag 31 is used for balance rehabilitation or balance training of patients, so the air bag 31 also needs to be able to be stepped by human power to cause the platform on the air bag 31 to tilt, so the design of the air bag 31 also needs to consider maintaining a certain elasticity. In this application, the first stress groove 314 is arranged densely on the top of the air bag 31, and the width of the first stress groove 314 is small, and the width of the reinforcing rib 316 is small. The second stress groove 315 is arranged sparsely, and the width of the second stress groove 315 is large, i.e. the width of the reinforcing rib 316 is large.

[0038] The user's standing platform (top) is connected to the rigid main sidewall by a layer of extremely soft "hinge" zones. This makes the platform feel less like it is sitting directly on the airbag 31 and more like it is floating on a solid base. Any tilting motion must first compress or stretch the top soft edge zones before it can be transmitted to the main airbag 31 body.

[0039] When the user tilts, the force first acts on the top soft annular zones, causing them to create large, localized folds and deformations. Only when the tilt angle is large enough to overcome the deformation of the top soft zones does the force effectively pass into the middle rigid section of the sidewall, causing the entire airbag 31 to tilt. This creates a "two-stage" feedback mechanism: the first stage is very soft and sensitive; the second stage is stable and powerful. This delayed and nonlinear feedback is something that a conventional airbag 31 cannot provide.

[0040] At the same time, the application strengthens the support at the waist position of the airbag 31 to avoid relative transverse shear displacement between the balance board 2 and the base 1 when the balance board 2 tilts.

[0041] This "hard middle soft ends" structure causes the initial deformation to occur at the "neck" where the foot platform is connected to the main body of the airbag 31, so any small change in the center of gravity is amplified, thereby improving the timeliness and sensitivity of the pressure sensor in receiving pressure signals. This design focuses the training focus on the fine control ability of the ankle. The user can clearly feel the slight pressure changes of the soles and heels, and the training effect is extremely accurate and efficient.

[0042] Further, when jumping or performing dynamic movements, the top and bottom extremely soft annular zones are the first to absorb the impact force. They effectively disperse the stress like a cushion, greatly reducing the impact force transmitted to the joints (especially the ankles and knees). For postoperative rehabilitation or users with arthritis, this design provides efficient balance training while maximizing safety, which is a great advantage.

[0043] The airbag 31 is no longer simply tilting left and right. In dynamic movements, it can produce a "rebound shaking" effect due to the presence of the upper and lower soft zones. For example, when a rapid tilt is corrected, the soft "hinge" zones can generate a slight rebound force, requiring the user's nervous system to react quickly and stabilize the body again. This greatly trains the speed of the neuromuscular response and dynamic stability.

[0044] Because the middle section is rigid, the airbag 31 has a strong tendency to return to the center after a large tilt. Once the user manages to bring the center of gravity close to the center, the rigid middle section provides a clear and powerful support feeling, which can guide the user to find and maintain the correct balance position.

[0045] The implementation principle of this application is as follows: In dynamic positioning mode, the four support blocks 43 supporting the balance plate 2 will retract downwards, and the air pressure inside the airbag 31 will instantly adjust to a preset air pressure value, relying on the pressure inside the airbag 31 to support the balance plate 2. The pressure inside the airbag 31 is adjusted through a proportional valve at the airbag 31 inflation port.

[0046] In passive positioning mode, the four support blocks 43 supporting the balance plate 2 will be lifted upwards, and the air pressure in the airbag 31 will be released instantly. The balance plate 2 will be leveled by the four supports, and then rotated according to the instructions sent by the host computer.

[0047] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A dynamic and static balance assessment and training device, characterized in that, include, The base (1) and the balance plate (2) Airbag (31), the airbag (31) is configured as a drum shape and is located between the balance plate (2) and the base (1). Multiple annular stress grooves are provided on the outer side wall and top of the airbag (31). The distance L2 between the multiple stress grooves on the side wall of the airbag (31) is greater than the distance L1 between the multiple stress grooves on the top of the airbag (31). Multiple balance support components (4) are located between the base (1) and the balance plate (2). The multiple balance support components (4) surround the airbag (31). The balance support components (4) can abut against the balance plate (2) to adjust the distance between the balance plate (2) and the base (1).

2. The dynamic and static balance assessment and training device according to claim 1, characterized in that, The outer wall of the airbag (31) is divided into a first expansion area (311) and a second expansion area (312). The first expansion area (311) is opposite to the balance plate (2). A first stress groove (314) is provided in the first expansion area (311), and a second stress groove (315) is provided in the second expansion area (312). The width D2 of the second stress groove (315) is greater than the width D1 of the first stress groove (314). The width L2 of the reinforcing rib (316) between adjacent second stress grooves (315) is greater than the width L1 of the reinforcing rib (316) between adjacent first stress grooves (314).

3. The dynamic and static balance assessment and training device according to claim 2, characterized in that, The area of ​​the second expansion zone (312) near the first expansion zone (311) and the mounting plate (13) is defined as the transition zone (313). The transition zone (313) is provided with a third stress groove (318). The width D2 of the second stress groove (315) is greater than the width D3 of the third stress groove (318). The width D3 of the third stress groove (318) is greater than the width D1 of the first stress groove (314). The width L2 of the reinforcing rib (316) between adjacent second stress grooves (315) is greater than the width L3 of the reinforcing rib (316) between adjacent third stress grooves (318). The width L3 of the reinforcing rib (316) between adjacent third stress grooves (318) is greater than the width L1 of the reinforcing rib (316) between adjacent first stress grooves (314).

4. The dynamic and static balance assessment and training device according to claim 2, characterized in that, The air bladder (31) in the second expansion zone (312) is set in an arc shape, the overall arc length of the second expansion zone (312) is C, and the arc length of the reinforcing rib (316) between adjacent second stress grooves (315) does not exceed 1 / 2C.

5. The dynamic and static balance assessment and training device according to claim 2, characterized in that, The width of the first stress groove (314) is 2~5mm, and the width of the reinforcing rib (316) between adjacent first stress grooves (314) is 3~5mm.

6. The dynamic and static balance assessment and training device according to claim 1, characterized in that, A bracket (11) is provided on the base (1), and an inner support cylinder (32) for installing the airbag (31) is provided on the bracket (11). A sealing component (33) is provided between the inner support cylinder (32) and the cavity.

7. The dynamic and static balance assessment and training device according to claim 6, characterized in that, The sealing assembly (33) includes a limiting groove (321) provided at the bottom of the outer side wall of the inner support cylinder (32). The sealing assembly (33) includes a bottom plate (331) and a side plate (332). The bottom plate (331) is annular and is fixed to the bracket (11) by screws. The inner circle of the bottom plate (331) is located in the limiting groove (321). The side plate (332) is cylindrical and is coaxially sleeved on the outer side of the inner support cylinder (32). The inner side of the bottom of the side plate (332) is connected to a snap-fit ​​part (334). The snap-fit ​​part (334) is inserted into the limiting groove (321) and located above the bottom plate (331).

8. The dynamic and static balance assessment and training device according to claim 7, characterized in that, The bottom of the outer edge of the base plate (331) is provided with an annular groove, and a first groove (333) is formed between the annular groove and the bracket (11). The outer edge of the top of the inner support cylinder (32) is connected to a pressure ring (322). A second groove (335) is formed between the top of the side plate (332) and the bottom surface of the pressure ring (322). The upper edge of the inner side of the airbag (31) is inserted into the first groove (333), and the lower edge is inserted into the second groove (335).

9. The dynamic and static balance assessment and training device according to claim 8, characterized in that, The portion of the airbag (31) inserted into the first groove (333) and the second groove (335) is provided with an annular safety strip (317), and the inner sidewalls of the first groove (333) and the second groove (335) are provided with grooves corresponding to the annular safety strip (317).

10. The dynamic and static balance assessment and training device according to claim 7, characterized in that, The base plate (331) is provided with a positioning groove (336) for limiting the outer edge of the side plate (332).

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