Knee joint protector for physical training

Abstract

This application discloses a knee joint protection device for physical training. The upper protective position, lower protective position, and front airbag jointly protect and position the front of the knee joint, while the upper support position, lower support position, and rear airbag jointly protect and position the rear of the knee joint. The side plate is fixed to the side and is used to support and position the left and right sides of the knee joint, thereby achieving all-round support and limiting protection for the knee joint from front to back and left to right, preventing knee joint dislocation. It also drives the air volume in the front and rear airbags and adjusts the size of the front and rear airbags to change the opening degree of the upper and lower protective positions, as well as the opening degree of the upper and lower support positions, thus shaping the knee joint bending angle and adapting to various bending angles of the knee joint.

Description

Technical Field

[0001] The application relates to the field of medical assistive devices, and in particular to a knee joint protection device for physical training. Background Technology

[0002] Some patients who have undergone knee replacement surgery need to pay attention to knee rehabilitation training because they are unfamiliar with controlling the knee prosthesis. This is to prevent prosthesis displacement and to avoid premature joint movement that could cause inflammation and affect the surgical outcome. Knee protection devices for physical training are usually used to protect and support the knee joint, preventing excessive movement and secondary injury or displacement. However, current physical training knee protection devices can only ensure the shaping and control of knee flexion, preventing excessive or frequent flexion. They lack positioning support for the front, back, and sides of the knee joint, making it easy for small-range movements to cause injury or displacement, thus affecting the patient's rehabilitation. Utility Model Content

[0003] This application provides a knee joint protection device for physical training, which effectively supports and positions the knee joint in the front, back, left, and right directions, preventing injury or dislocation during small-range activities and ensuring the effectiveness of knee joint rehabilitation training.

[0004] A knee joint protection device for physical training includes a flexible sleeve, two opposing side plates, and an air pump. The flexible sleeve has elasticity and is designed to fit over the patient's knee joint, adapting to knee flexion deformation. The flexible sleeve has side portions corresponding to the left and right sides of the knee joint, a front portion corresponding to the front of the knee joint, and a rear portion corresponding to the back of the knee joint. The front portion has an upper protective position and a lower protective position, and a front airbag located between the upper and lower protective positions. The rear portion has an upper support position and a lower support position, and a front airbag located between the upper and lower protective positions. The rear airbag between the support position and the lower support position; the upper protection position, the lower protection position, and the front airbag together provide frontal protection and positioning for the knee joint; the upper support position, the lower support position, and the rear airbag together provide posterior protection and positioning for the knee joint; the side plate is fixed to the side and is used to provide left and right lateral support and positioning for the knee joint; the air pump is connected to the front airbag and the rear airbag via a pipe; the air pump is used to drive the air volume in the front airbag and the rear airbag, and to adjust the size of the front airbag and the rear airbag, thereby changing the opening degree of the upper protection position and the lower protection position, as well as the opening degree of the upper support position and the lower support position, to shape the knee joint flexion angle.

[0005] The knee joint protection device for physical training further includes a guard plate assembly and a support plate assembly. The guard plate assembly includes an upper guard plate and a lower guard plate, and the support plate assembly includes an upper support plate and a lower support plate. The upper guard plate is fixed to the upper protection position for protecting and positioning the upper side of the knee, and the lower guard plate is fixed to the lower protection position for protecting and positioning the lower side of the knee. The upper support plate is fixed to the upper support position, and the lower support plate is fixed to the lower support position. The upper support plate is used to support the upper posterior side of the knee joint, and the lower support plate is used to support the lower posterior side of the knee joint.

[0006] The side plate, upper guard plate, lower guard plate, upper support plate, and lower support plate are all composed of a rigid plate and an elastic layer that adheres to the inner side of the rigid plate. The rigid plate is adapted to the arc-shaped bending shape of the knee joint, and the elastic layer elastically supports the knee joint.

[0007] The side portion has a circular interlayer space, and the side plate is a clamping plate with a circular outer edge, which is fixed within the circular interlayer space.

[0008] The upper guard plate has a side that slides with the edge of the side panel, the lower guard plate has a side that slides with the edge of the side panel, the upper support plate has a side that slides with the edge of the side panel, and the lower support plate has a side that slides with the edge of the side panel. When the front airbag increases ventilation and expands, the airbag drives the upper and lower guard plates to expand around the center of the side panel, while the rear airbag decreases ventilation and contracts, causing the upper and lower support plates to close together around the center of the side panel.

[0009] The knee joint protection device for physical training also includes an external support, which includes an upper fixation component, a lower fixation component, and a side rotation axis. The upper fixation component is used to hug the thigh, the lower fixation component is used to hug the calf, and the side rotation axis is connected to the upper fixation component and the lower fixation component, and is also connected to the side plate.

[0010] The knee joint protection device for physical training also includes a locking component, which is connected to the side rotation shaft, the upper fixing component, and the lower fixing component, and is used to lock the upper fixing component and the lower fixing component after adjusting their rotation angle.

[0011] The side rotating shaft is connected to the side plate on the left and right sides respectively, and the two side rotating shafts are detachably connected to the two side plates respectively.

[0012] The upper fixing assembly includes an upper fixing ring and two upper connecting rods fixedly connected to the upper fixing ring. The upper fixing ring is used to wrap around the thigh, and the two upper connecting rods are respectively located on both sides of the thigh. The lower fixing assembly includes a lower fixing ring and two lower connecting rods fixedly connected to the lower fixing ring. The end of the upper connecting rod away from the upper fixing ring is connected to the side rotating shaft, and is rotatably connected to the end of the lower connecting rod away from the lower fixing ring via the side rotating shaft.

[0013] The upper fixing ring is provided with an upper tightening band, and the upper tightening band is provided with a first Velcro fastener. The first Velcro fastener is used to adjust the tightness of the upper tightening band. The lower fixing ring is provided with a lower tightening band, and the lower tightening band is provided with a second Velcro fastener. The second Velcro fastener is used to adjust the tightness of the lower tightening band.

[0014] The knee joint protection device for physical training provided in this application provides frontal protection and positioning of the knee joint through the upper protective position, lower protective position, and front airbag; and rear protective positioning of the knee joint through the upper support position, lower support position, and rear airbag. The side plate is fixed to the side and is used to support and position the left and right sides of the knee joint, thereby achieving all-round support and limiting protection of the knee joint from front to back and left to right, preventing knee joint dislocation. It also drives the air volume in the front and rear airbags and adjusts the size of the front and rear airbags to change the opening degree of the upper and lower protective positions, as well as the opening degree of the upper and lower support positions, thus shaping the knee joint bending angle and adapting to various bending angles of the knee joint. Attached Figure Description

[0015] To more clearly illustrate the technical solution of the application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementations of the application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the knee joint protection device for physical training provided in the embodiments of this application; Figure 2 yes Figure 1 Another schematic diagram of a knee joint protection device for physical training; Figure 3 This is a cross-sectional schematic diagram of the knee joint protection device for physical training provided in the embodiments of this application; Figure 4 yes Figure 3 Another schematic diagram of a knee joint protection device for physical training; Figure 5 This is another schematic diagram of the knee joint protection device for physical training provided in the embodiments of this application. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the invention pertain; the terminology used herein in the description of embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the invention; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of embodiments of the invention, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of embodiments of the invention are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] To enable those skilled in the art to better understand the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Please see Figure 1 and Figure 2This application provides a knee joint protection device 100 for physical training. The knee joint protection device 100 includes a flexible sleeve 10, two opposing side plates 20, and an air pump 30. The flexible sleeve 10 has elastic extensibility and is used to fit over the patient's knee joint to adapt to knee bending deformation. The flexible sleeve 10 has side portions corresponding to the left and right sides of the knee joint, a front portion corresponding to the front side of the knee joint, and a rear portion corresponding to the back side of the knee joint. The front portion has an upper protective position 11 and a lower protective position 12, and a front airbag 13 located between the upper protective position 11 and the lower protective position 12. The rear portion has an upper support position 14 and a lower support position 15, and a rear airbag 16 located between the upper support position 14 and the lower support position 15. The upper protective position 11, lower protective position 12, and front airbag 13 jointly protect and position the front of the knee joint, while the upper support position 14, lower support position 15, and rear airbag 16 jointly protect and position the rear of the knee joint. The side plate 20 is fixed to the side and is used to support and position the left and right sides of the knee joint. The air pump 30 is connected to the front airbag 13 and the rear airbag 16 via a pipe. The air pump 30 is used to drive the air volume in the front airbag 13 and the rear airbag 16 and adjust the size of the front airbag 13 and the rear airbag 16 to change the opening degree of the upper protective position 11 and the lower protective position 12, as well as the opening degree of the upper support position 14 and the lower support position 15, thereby shaping the knee joint bending angle.

[0020] It is understood that the knee joint protection device 100 for physical training provided in this application provides protection and positioning for the front side of the knee joint through the upper protection position 11, the lower protection position 12 and the front airbag 13, and protection and positioning for the rear side of the knee joint through the upper support position 14, the lower support position 15 and the rear airbag 16. The side plate 20 is fixed to the side and is used to support and position the left and right sides of the knee joint, thereby achieving all-round support and limiting protection for the knee joint from front to back and left to right, preventing knee joint dislocation, and driving the air volume in the front airbag 13 and the rear airbag 16 to adjust the size of the front airbag 13 and the rear airbag 16, so as to change the opening degree of the upper protection position 11 and the lower protection position 12, as well as the opening degree of the upper support position 14 and the lower support position 15, to shape the knee joint bending angle and adapt to various bending angles of the knee joint.

[0021] Understandably, after knee surgery, knee joint mobility needs to be gradually restored and adapted through physical training. The amount and duration of knee flexion need to be controlled, thus requiring knee joint shaping. Furthermore, effective support is needed in all directions (front, back, left, and right) to prevent knee misalignment. Therefore, the anterior airbag 13 and posterior airbag 16, while maintaining constant ventilation, can maintain their shape and provide effective support, preventing displacement of the upper protective plate 11, lower protective plate 12, side plate 20, upper support plate, and lower support plate, thereby effectively shaping the knee joint. During the patient's knee surgery rehabilitation physical training, to gradually restore knee flexion, the ventilation volume of the anterior airbag 13 and posterior airbag 16 can be adjusted. This allows for adjustments to the allowable knee flexion angle supported by the anterior airbag 13 and posterior airbag 16, enabling, for example, gradually increasing or decreasing the knee flexion angle to prevent knee joint dysfunction. Of course, it is understandable that during a relatively good phase of physical training for knee joint rehabilitation, the ventilation of the anterior airbag 13 and the posterior airbag 16 can be released, allowing the unrestricted structures between the upper protective position 11 and the lower protective position 12 to move relative to each other, as well as the unrestricted structures between the upper support position 14 and the lower support position 15, thereby restoring the range of motion of the knee joint flexion.

[0022] In this embodiment, the flexible sheath 10 is made of elastic fabric (such as a nylon / spandex blend), and is cylindrical in shape to wrap around the knee joint and adapt to its bending deformation. The flexible sheath 10 has a first splicing edge 101 and a second splicing edge 102 between one side and the rear. The first splicing edge 101 has multiple pull loops 1011 arranged side-by-side, and the second splicing edge 102 has multiple hook-and-loop fasteners 1021 arranged side-by-side. One end of each hook-and-loop fastener 1021 can pass through the pull loop 1011 and be attached to the second splicing edge 102, effectively splicing the first splicing edge 101 and the second splicing edge 102, and allowing adjustment of the tightness of the flexible sheath 10 on the patient's knee joint. During the process of applying the flexible protective sleeve 10, firstly, the first splicing edge 101 and the second splicing edge 102 are opened. Then, the side plate 20 is aligned with the left and right sides of the knee joint, the front part is aligned with the front side of the knee joint, and the rear part is aligned with the back side of the knee joint. Then, the splicing Velcro 1021 is passed through the pull ring 1011. After adjusting the tightness, the splicing Velcro 1021 is bent in the opposite direction and pasted and fixed to the second splicing edge 102, so that the flexible protective sleeve 10 is finally applied to the knee joint.

[0023] In this embodiment, the upper protective position 11 always conforms to the upper front side of the knee joint, and the lower protective position 12 always conforms to the lower front side of the knee joint. If knee flexion is considered equivalent to a revolute joint, the front side of the knee joint has a radius of rotation, causing the arc length of the front side to change with the change of the flexion angle. That is, the larger the knee joint opening angle and the closer the leg is to upright, the smaller the arc length of the front side, and the upper protective position 11 and the lower protective position 12 are close together. Similarly, the rear side of the knee joint will also have an increased arc length due to the radius of rotation, meaning the upper support position 14 and the lower support position 15 are almost fully extended. Conversely, when the knee joint flexion and retraction angle is smaller and the leg is close to a right angle, the arc length of the front side increases, and the upper protective position 11 and the lower protective position 12 are relatively extended. At this time, the arc length of the rear side will decrease, meaning the upper support position 14 and the lower support position 15 are relatively closed. In other words, changes in the knee flexion angle affect the opening degree of the upper protective position 11 and the lower protective position 12, as well as the opening degree of the upper support position 14 and the lower support position 15. When the opening degree of the upper protective position 11 and the lower protective position 12 increases, the opening degree of the upper support position 14 and the lower support position 15 decreases, and vice versa. Therefore, to ensure the knee flexion angle is fixed and can adapt to changes in the extension length of the anterior and posterior sides of the knee joint, adjustable protective areas for the anterior and posterior sides of the knee joint are required. Furthermore, the anterior portion provides fixed protection for the anterior side of the knee joint, and the posterior portion provides fixed support for the posterior side of the knee joint. In the embodiments of this application, the front airbag 13 and the rear airbag 16 are connected to the air pump 30 through pipes. The air pump 30 can adjust the ventilation volume of the front airbag 13 and the ventilation volume of the rear airbag 16, thereby changing the extension degree of the front airbag 13 and the extension degree of the rear airbag 16, and further adjusting the opening degree of the upper protective position 11 and the lower protective position 12, as well as the opening degree of the upper support position 14 and the lower support position 15.

[0024] Understandably, when the knee joint angle approaches 180°, the air volume of the anterior airbag 13 decreases, causing the anterior airbag 13 to nearly fully contract. At this point, the upper protective position 11 and the lower protective position 12 are nearly closed. The upper protective position 11 and the lower protective position 12 move closer together for support (there is a gap between the upper protective position 11 and the lower protective position 12 where the anterior airbag 13 cannot contract further, achieving support and limiting the upper protective position 11 and the lower protective position 12 from moving closer together), thereby restricting the knee joint bending angle from increasing further, achieving shaping, and the upper protective position 11, the reduced anterior airbag 13, and the lower protective position 12 together provide anterior protection for the knee joint, including knee protection on the anterior side of the knee joint. For example, the anterior airbag 13 provides protection at the center of the knee, the upper protective position 11 provides protection at the upper part of the knee and above the knee, and the lower protective position 12 provides protection at the lower part of the knee and below the knee. When the knee joint bends at approximately 180°, the ventilation of the rear airbag 16 increases, and the rear airbag 16 nearly fully deploys. At this time, the upper support position 14 and the lower support position 15 are nearly deployed. The upper support position 14 and the lower support position 15 are supported by an enlarged rear airbag 16 (the rear airbag 16 is enlarged and shaped after being inflated, and when it is closed, the rear airbag 16 supports and limits the upper support position 14 and the lower support position 15, preventing them from approaching each other), thereby limiting the knee joint bending angle from decreasing and achieving knee joint shaping at a state close to 180°. The upper support position 14, the enlarged rear airbag 16, and the lower support position 15 together provide posterior support and protection for the knee joint, including internal protection of the posterior side of the knee joint. For example, the rear airbag 16 supports and protects the popliteal fossa on the posterior side of the knee joint, the upper support position 14 supports and protects the upper side and the area above the popliteal fossa, and the lower support position 15 supports and protects the area below and the area below the popliteal fossa.

[0025] Similarly, when the knee joint bends at an angle close to 90°, the air volume of the front airbag 13 increases, causing the front airbag 13 to expand. At this time, the upper protective position 11 and the lower protective position 12 are relatively deployed. The front airbag 13 corresponds to knee protection, the upper protective position 11 corresponds to protection above the knee, and the lower protective position 12 corresponds to protection below the knee. When the knee joint bends at an angle close to 90°, the air volume of the rear airbag 16 decreases, causing the rear airbag 16 to expand and shrink. At this time, the upper support position and the lower support position 15 are relatively close together. The rear airbag 16 corresponds to the support and protection in the center of the popliteal fossa, the upper support position 14 corresponds to a part of the popliteal fossa and the support and protection above the popliteal fossa, and the lower support position 15 corresponds to a part of the popliteal fossa and the support and protection below the popliteal fossa.

[0026] In this embodiment, both the front airbag 13 and the rear airbag 16 can be made of highly elastic and contractile materials, such as rubber, silicone, or TPU. When the front airbag 13 and rear airbag 16 are inflated, they can elastically expand to increase their volume, maintaining their shape and providing support while keeping the internal air volume constant. Similarly, when the front airbag 13 and rear airbag 16 are inflated, they can elastically contract to decrease their volume, still maintaining their shape and providing support while keeping the internal air volume constant. As long as the pressure is insufficient to cause elastic stretching of the front and rear airbags 16, they will essentially maintain their shape, thus providing support and shaping performance. Furthermore, the front airbag 13 and rear airbag 16 adapt to the bending deformation of the knee joint, closely conforming to the knee joint and achieving tight support and shaping performance.

[0027] In this embodiment, the flexible sheath 10 is provided with a front protective layer 131 and a rear protective layer 161 on the outer sides of the front airbag 13 and the rear airbag 16, respectively. The front protective layer 131 connects the upper protective position 11 and the lower protective position 12, and the rear protective layer 161 connects the upper support position 14 and the lower support position 15. The front protective layer 131 and the rear protective layer 161 are made of a fabric with wear resistance, puncture resistance, and high toughness, such as nylon fabric, aramid fabric, polyester fabric, etc. The flexible sheath 10 is also provided with a front bonding layer 132 sewn together with the front protective layer 131, and a rear bonding layer 162 sewn together with the rear protective layer 161. The front airbag 13 is located between the front protective layer 131 and the front bonding layer 132, and the rear airbag 16 is located between the rear protective layer 161 and the rear bonding layer 162. The front bonding layer 132 and the rear bonding layer 162 are made of skin-friendly cotton fabric, which is comfortable, breathable and fits the skin well, increasing comfort.

[0028] Further, please refer to Figure 1 , Figure 3 and Figure 4 The knee joint protection device 100 for physical training also includes a guard plate assembly and a support plate assembly. The guard plate assembly includes an upper guard plate 41 and a lower guard plate 42. The support plate assembly includes an upper support plate 51 and a lower support plate 52. The upper guard plate 41 is fixed to the upper protection position 11 for positioning and protecting the upper side of the knee. The lower guard plate is fixed to the lower protection position 12 for positioning and protecting the lower side of the knee. The upper support plate 51 is fixed to the upper support position 14, and the lower support plate 52 is fixed to the lower support position 15. The upper support plate 51 is used to support the upper rear side of the knee joint, and the lower support plate 52 is used to support the lower rear side of the knee joint.

[0029] In this embodiment, the upper protective position 11 includes an upper front outer layer 111 and an upper front inner layer 112. The edges of the upper front outer layer 111 and the upper front inner layer 112 are sewn together, thereby forming an upper front interlayer space between the upper front outer layer 111 and the upper front inner layer 112. The upper protective plate 41 is fixed within the upper front interlayer space. The lower protective position 12 includes a lower front outer layer 121 and a lower front inner layer 122. The edges of the lower front outer layer 121 and the lower front inner layer 122 are sewn together, thereby forming a lower front interlayer space between the lower front outer layer 121 and the lower front inner layer 122. The lower protective plate 42 is fixed within the lower front interlayer space. Of course, in other embodiments, the flexible sheath 10 may have a base layer, with the upper protective plate bonded to the base layer corresponding to the upper protective position 11, and the lower protective plate bonded to the base layer corresponding to the lower protective position 12.

[0030] In this embodiment, the upper support position 14 includes an upper rear outer layer 141 and an upper rear inner layer 142. The edges of the upper rear outer layer 141 and the upper rear inner layer 142 are sewn together, thereby forming an upper rear interlayer space between the upper rear outer layer 141 and the upper rear inner layer 142. The upper support plate 51 is fixed within the upper rear interlayer space. The lower support position 15 includes a lower rear outer layer 151 and a lower rear inner layer 152. The edges of the lower rear outer layer 151 and the lower rear inner layer 152 are sewn together, thereby forming a lower rear interlayer space between the lower rear outer layer 151 and the lower rear inner layer 152. The lower support plate 52 is fixed within the lower rear interlayer space. Of course, in other embodiments, the flexible sheath 10 may have a base layer, with the upper support plate 51 bonded to the base layer corresponding to the upper support position 14, and the lower protective plate bonded to the base layer corresponding to the lower protective position 12.

[0031] In this embodiment, the upper guard plate 41, lower guard plate 42, upper support plate 51, and lower support plate 52 all have a certain thickness. The upper guard plate 41 has a first upper side edge that abuts against the side plate 20 and a first upper limit edge that abuts against the front airbag 13. The lower guard plate 42 has a first lower side edge that abuts against the side plate 20 and a first lower limit edge that abuts against the rear airbag 16. Because the upper guard plate 41 and lower guard plate 42 have thickness, the sides of the first upper limit edge and the sides of the first lower limit edge abut against the front airbag 13, providing support and limiting performance and playing a shaping role. At the same time, the first upper side edge and the first lower side edge abut against the sides of the side plate 20, and the thickness of the side plate 20 is close to that of the upper guard plate 41, lower guard plate 42, upper support plate 51, and lower support plate 52. Because the upper support plate 41 and lower support plate 42 abut against the side plate 20 face to face, the upper support plate 41 and side plate 20 are not prone to displacement in the direction of the knee joint surface, i.e., they are not prone to overlapping. Similarly, the upper support plate 51 has a second upper side edge abutting against the side plate 20 and a second upper limit edge abutting against the rear airbag 16. The lower support plate 52 has a second lower side edge 521 abutting against the side plate 20 and a second lower limit edge abutting against the rear airbag 16. Because the upper support plate 51 and lower support plate 52 have thickness, the sides of the second upper limit edge and the sides of the second lower limit edge abut against the rear airbag 16, providing support and limiting performance and playing a shaping role. The upper front outer layer 111, the lower front outer layer 121 and the outer layer of the side plate 20 can be sewn together, and the upper rear outer layer 141, the lower rear outer layer 151 and the outer layer of the side plate 20 can be sewn together, so that the flexible sheath 10 has a binding effect, so that the upper protective plate 41 is close to the side plate 20, the lower protective plate 42 is close to the side plate 20, the upper support plate 51 is close to the side plate 20, and the lower support plate 52 is close to the side plate 20. At the same time, after the front airbag 13 and the rear airbag 16 are shaped, they jointly bind the knee joint, wrap and bind the knee joint to prevent knee joint dislocation or arbitrary bending. Of course, due to the expansion and contraction of muscles during knee flexion and the complex shape of the knee joint, the plates are not absolutely in contact with each other. The upper guard plate 41 and the side plate 20, the lower guard plate 42 and the side plate 20, the upper support plate 51 and the side plate 20, and the lower support plate 52 and the side plate 20 are also not absolutely in contact. However, the tightening effect of the flexible sleeve 10 can effectively restrain the movement of the knee joint. Under the combined restraint of the plates and the airbag, excessive movement of the knee joint is avoided, which may cause accidental dislocation. The side plate 20 provides support mainly in the lateral direction of the knee joint. In the anterior direction, the upper guard plate 41, the anterior airbag 13, and the lower guard plate 42 can be kept in close contact to prevent the knee joint from dislocating. In the posterior direction, the lower support plate 52, the rear airbag 16, and the lower support plate 52 can be kept in close contact to prevent the knee joint from dislocating.

[0032] It is understood that the front protective layer 131, rear protective layer 161, outer layer of side panel 20, upper front outer layer 111, lower front outer layer 121, upper rear outer layer 141, and lower rear outer layer 151 can be made of a single piece of fabric. Of course, different fabrics can also be used as needed. In this embodiment, the front bonding layer 132, rear bonding layer 162, upper front inner layer 112, lower front inner layer 122, upper rear inner layer 142, lower rear inner layer 152, and inner layer of side panel 20 can be made of the same fabric and sewn together. Of course, different fabrics can also be used as needed. The flexible sheath 10 can be integrally formed with the same fabric as the front bonding layer 132, the rear bonding layer 162, the upper front inner layer 112, the lower front inner layer 122, the upper rear inner layer 142, the lower rear inner layer 152 and the inner layer of the side panel 20 in other positions, so that the flexible sheath 10 has the properties of being skin-friendly, breathable, fitting, highly elastic and adaptable to deformation in other positions.

[0033] Furthermore, the side plate 20, upper guard plate 41, lower guard plate 42, upper support plate 51, and lower support plate 52 are all composed of a rigid plate and an elastic layer adhering to the inner side of the rigid plate. The rigid plate is adapted to the arc-shaped bending shape of the knee joint, and the elastic layer elastically supports the knee joint. The upper guard plate 41 and lower guard plate 42 are curved to adapt to the bending shape of the front side of the knee joint. The upper support plate 51 and lower support plate 52 are curved to adapt to the bending shape of the rear side of the knee joint. The side plate 20 is approximately a spherical plate. The rigid plate can be made of highly breathable foam board. The elastic layer can be made of latex or a latex and sponge composite layer.

[0034] Furthermore, the side portion is provided with a circular interlayer space, and the side plate 20 is a clamping plate with a circular outer edge, and the side plate 20 is fixed within the circular interlayer space. The outer fabric of the side plate 20 is sewn together with the inner fabric, thereby fixing the side plate 20 within the circular interlayer space and preventing displacement. Specifically, the two sides of the area where the front airbag 13 is located are fan-shaped, and the two sides of the area where the rear airbag 16 is located are fan-shaped. The fan-shaped angle of the front airbag 13 is smaller than that of the rear airbag 16, thereby facilitating the effective deployment of the rear airbag 16 and preventing excessive bending of the knee joint. Since the upper protective position 11 and the lower protective position 12 rotate approximately around the bending rotation axis of the knee joint during the relative opening and closing process, the deployment and contraction of the front airbag 13 will generally occur within the fan-shaped area, and the center of this fan-shaped area is approximately located on the bending rotation axis of the knee joint. Similarly, during the relative opening and closing process, the upper support 14 and the lower support 15 also rotate approximately around the bending and rotating axis of the knee joint. Therefore, the deployment and contraction of the rear airbag 16 will generally take place within a fan-shaped area, and the center of this fan-shaped area is approximately located on the bending and rotating axis of the knee joint.

[0035] Furthermore, the side of the upper guard plate 41 is slidably adapted to the edge of the side plate 20, the side of the lower guard plate 42 is slidably adapted to the edge of the side plate 20, the side of the upper support plate 51 is slidably adapted to the edge of the side plate 20, and the side of the lower support plate 52 is slidably adapted to the edge of the side plate 20. When the front airbag 13 increases ventilation and opens, the airbag drives the upper guard plate 41 and the lower guard plate 42 to open around the center of the side plate 20, while the rear airbag 16 decreases ventilation and contracts, and the upper support plate 51 and the lower support plate 52 close together around the center of the side plate 20.

[0036] In this embodiment, the center of the side plate 20 is roughly aligned with the axis of the knee joint's bending rotation, so that the upper guard plate 41 and the lower guard plate 42 can rotate and cooperate around the center of the side plate 20. Thus, the sides of the upper guard plate 41 and the lower guard plate 42 slide and cooperate with the edge of the side plate 20. When the knee joint adjusts the bending angle, the front airbag 13 inflates and opens, and the upper guard plate 41 and the lower guard plate 42 open roughly around the center of the side plate 20. The air volume of the front airbag 13 decreases and contracts, and the upper guard plate 41 and the lower guard plate 42 move closer together roughly around the center of the side plate 20. Similarly, the upper support plate 51 and the lower support plate 52 also rotate and cooperate roughly around the center of the side plate 20, so that the side of the upper support plate 51 and the side of the lower support plate 52 slide and cooperate with the edge of the side plate 20. When the knee joint adjusts the bending angle, the front airbag 13 inflates and opens, and the air volume of the rear airbag 16 decreases and contracts. The upper support plate 51 and the lower support plate 52 roughly move closer around the center of the side plate 20. The air volume of the front airbag 13 decreases and contracts, and the air volume of the rear airbag 16 increases and opens. The upper support plate 51 and the lower support plate 52 roughly open around the center of the side plate 20. Of course, since the upper guard plate 41, lower guard plate 42, upper support plate 51, lower support plate 52 and side plate 20 are not rotationally constrained, the upper guard plate 41, lower guard plate 42, upper support plate 51, lower support plate 52 do not rotate absolutely around the center of the side plate 20. It is only due to the binding property of the flexible sleeve 10 that the upper guard plate 41, lower guard plate 42, upper support plate 51, lower support plate 52 are brought closer to the side plate 20, and there is a general rotational cooperation relationship, achieving joint binding and protection of the knee joint. The side plate 20 is designed as a circular plate to facilitate the sliding of the upper guard plate 41, lower guard plate 42, upper support plate 51, lower support plate 52 relative to the arc edge of the side plate 20, achieving a general rotational opening or closing. Of course, the side plate 20 can also be an elliptical plate.

[0037] In this embodiment, a buckle 201 is provided on the outer side of the side plate 20 near the first splicing edge 101, and a connecting plate 1022 corresponding to the side plate 20 is provided, which can partially overlap the side plate 20. The connecting plate 1022 is provided with a pull buckle 202 that can be detachably engaged with the buckle 201. When the pull buckle 202 is engaged with the buckle 201, and the splicing Velcro 1021 is passed through the pull ring 1011 and fastened, the first splicing edge 101 and the second splicing edge 102 are fixed. Of course, in some embodiments, an inner adhesive sheet can extend from the first splicing edge 101, and Velcro can be provided on the inner adhesive sheet. The second splicing edge 102 can overlap on the inner adhesive sheet, thereby increasing the overall splicing stability of the first splicing edge 101 and the second splicing edge 102, and making the tightening performance of the flexible sheath 10 better.

[0038] Further, please refer to Figure 1 , Figure 3 and Figure 5 The knee joint protection device 100 for physical training also includes an external support 60, which includes an upper fixing component 61, a lower fixing component 62, and a side rotation axis 63. The upper fixing component 61 is used to hug the thigh, the lower fixing component 62 is used to hug the calf, and the side rotation axis 63 is connected to the upper fixing component 61 and the lower fixing component 62, and is also connected to the side plate 20.

[0039] In this embodiment, the upper fixing component 61 includes an upper fixing ring 611 and two upper connecting rods 612 fixedly connected to the upper fixing ring 611. The upper fixing ring 611 is used to wrap around the thigh, and the two upper connecting rods 612 are respectively located on both sides of the thigh. The upper fixing ring 611 is provided with an upper tightening strap 613, and the upper tightening strap 613 is provided with a first Velcro 6132, which is used to adjust the tightness of the upper tightening strap 613. The upper fixing ring 611 is an elastic circular plastic part. The upper fixing ring 611 has an upper opening 614, which is used to open the upper fixing ring 611, thereby facilitating the upper fixing ring 611 to open and wrap around the thigh. The upper tightening strap 613 is disposed in the inner layer of the upper fixing ring 611 for conforming to the thigh. The upper tightening strap 613 has an upper pull ring 6141 at one end of the upper opening 614, and the other end is connected to the first Velcro 6132. One end of the first Velcro 6132 passes through the upper pull ring 6141, bends in the opposite direction, and is then glued to the back of the first Velcro 6132. This allows adjustment of the tightness of the upper fixing ring 611 around the thigh, ensuring stable support for the two upper connecting rods 612. One end of the upper connecting rod 612 and the upper fixing ring 611 can be integrally formed, fixed with screws, or fixed with rivets. In some embodiments, to facilitate adjustment of the distance between the upper connecting rod 612 and the upper fixing ring 611, and to facilitate rotation of the upper connecting rod 612 and the lower fixing assembly 62, the upper connecting rod and the upper fixing assembly 611 can be fixed with bolts that can adjust the locking length. The other end of the upper connecting rod 612 is connected to the side rotating shaft 63, so that the upper fixing component 61 is rotatably connected to the lower fixing component 62 via the side rotating shaft 63. Thus, when the upper fixing component 61 is fixed to the thigh, it is connected to the side plate 20 via the side rotating shaft 63, allowing the side plate 20 to be securely clamped by the two upper connecting rods 612. This increases the support and stability of the side plate 20 on both sides of the knee joint, effectively preventing displacement of the knee joint to the left and right. Specifically, one end of the side rotating shaft 63 is connected to the side plate 20, and the other end is rotatably connected to the end of the upper connecting rod 612 away from the upper fixing ring 611. The side rotating shaft 63 is set approximately perpendicular to the side plate 20 so that the connecting rod provides a clamping force to the side rotating shaft 63, ensuring that the side plate 20 is close to the side of the knee joint.

[0040] In this embodiment, the lower fixing component 62 includes a lower fixing ring 621 and two lower connecting rods 622 fixedly connected to the lower fixing ring 621. One end of the upper connecting rod 612, away from the upper fixing ring 611, is connected to the side rotating shaft 63, and is rotatably connected to the end of the lower connecting rod 622 away from the lower fixing ring 621 via the side rotating shaft 63. The lower fixing ring 621 is provided with a lower tightening strap 623, and the lower tightening strap 623 is provided with a second Velcro 6232, which is used to adjust the tightness of the lower tightening strap 623. The lower fixing ring 621 is an elastic circular plastic part. The lower fixing ring 621 has a lower opening 624, which is used to open the lower fixing ring 621, thereby facilitating the lower fixing ring 621 to open and wrap around the lower leg portion. The lower tightening strap 623 is disposed in the inner layer of the lower fixing ring 621 for conforming to the lower leg. The lower tightening strap 623 has a pull-down ring 6241 at one end of the lower opening 624, and the other end is connected to the second Velcro 6232. One end of the second Velcro 6232 passes through the pull-down ring 6241, bends in the opposite direction, and is then glued to the back of the second Velcro 6232. This allows adjustment of the tightness of the lower fixing ring 621 around the lower leg, ensuring stable support for the two lower connecting rods 622. One end of the lower connecting rod 622 and the lower fixing ring 621 can be integrally formed, fixed with screws, or fixed with rivets. Therefore, in some embodiments, to facilitate adjustment of the distance between the lower connecting rod 622 and the lower fixing ring 621, and to facilitate rotation of the lower connecting rod 622 and the upper connecting rod 612, the lower connecting rod 622 and the lower fixing ring 611 can be fixed with bolts that can adjust the locking length. The other end of the lower connecting rod 622 is connected to the side rotating shaft 63, so that the lower connecting rod 622 is rotatably connected to the upper connecting rod 612 via the side rotating shaft 63. That is, the lower fixing component 62 is rotatably connected to the upper fixing component 612. Thus, when the lower fixing component 62 is fixed to the lower leg, the lower connecting rod 622 is connected to the side plate 20 via the side rotating shaft 63, so that the side plate 20 is clamped and stabilized by the two lower connecting rods 622, which increases the support and stability performance of the side plate 20 and the left and right sides of the knee joint, and more effectively prevents the knee joint from shifting to the left and right. Specifically, one end of the side rotating shaft 63 is connected to the side plate 20, and the other end is rotatably connected to the end of the lower connecting rod 622 away from the upper fixing ring 611. The side rotating shaft 63 passes through both the upper connecting rod 612 and the lower connecting rod 622. By utilizing the rotatable connection between the upper link 612 and the lower link 622, the knee joint is not restricted by the upper link 612 and the lower link 622 when it needs to be bent, and the side plate 20 can maintain the restraining and limiting effect on the side of the knee joint.

[0041] Furthermore, the knee joint protection device 100 for physical training also includes a locking member 70, which is connected to the side rotation shaft 63, the upper fixing component 61, and the lower fixing component 62, and is used to lock the upper fixing component 61 and the lower fixing component 62 after adjusting their rotation angle.

[0042] In this embodiment, two locking members 70 are provided. The two locking members 70 respectively lock the upper connecting rod 612 and the lower connecting rod 622 on both sides of the knee joint, restricting the rotation of the upper connecting rod 612 relative to the lower connecting rod 622. This allows for shaping of the knee joint flexion after the knee joint flexion angle has been adjusted. Each locking member 70 includes a wing nut 71, a first ratchet 72 fixed to the upper connecting rod 612, and a second ratchet 73 fixed to the lower connecting rod 622. The side rotating shaft 63 has a threaded post 74 at one end passing through the upper connecting rod 612 and the lower connecting rod 622. The side rotating shaft 63 has a boss 631 that abuts against the upper connecting rod 612 to restrict the upper connecting rod 612 from moving towards the side plate 20. The wing nut 71 is threadedly connected to the other wing nut 72. When the wing nut 71 is loosened from the threaded post 74, the first ratchet 72 and the second ratchet 73 disengage, allowing the upper connecting rod 612 and the lower connecting rod 622 to rotate relative to each other around the side pivot 63. When the wing nut 71 is tightened from the threaded post 74, the boss 631 of the side pivot 63 and the wing nut 71 together clamp the upper connecting rod 612 and the lower connecting rod 622, causing the first ratchet 72 and the second ratchet 73 to mesh with each other, preventing them from rotating relative to each other, and consequently preventing the upper connecting rod 612 and the lower connecting rod 622 from rotating relative to each other. The upper connecting rod 612 and the first ratchet 72 can be fixed by screws, pins, rivets, adhesive, etc., and the lower connecting rod 622 and the second ratchet 73 can be fixed by screws, pins, rivets, adhesive, etc. Of course, in other embodiments of this application, the locking member 70 can also be a cam lock, that is, by setting a cam that rotates on the side main shaft, the cam can make the upper connecting rod 612 and the lower connecting rod 622 move closer or open, so that the upper connecting rod 612 and the lower connecting rod 622 can be locked and fixed to each other, or can rotate relative to each other. Of course, in other embodiments of this application, the upper connecting rod 612 and the lower connecting rod 622 can also be locked and fixed to each other by a pin and an anti-rotation hole. For example, the upper connecting rod 612 is provided with a flange surrounding the side rotating shaft 63, and the flange is provided with multiple anti-rotation holes around the axis of the side rotating shaft 63. The pin passes through the through hole of the lower connecting rod 622 and engages with the anti-rotation hole on the flange, thereby locking and fixing the upper connecting rod 612 and the lower connecting rod 622 and restricting the rotation of the upper connecting rod 612 and the lower connecting rod 622.

[0043] In this embodiment, the air pump 30 is connected to the front airbag 13 via a first conduit 301 and to the rear airbag 16 via a second conduit 302. The air pump 30 may have a built-in miniature air pump, be battery-powered, and include a built-in controller and external control buttons. The control buttons are electrically connected to the controller, the controller is electrically connected to the miniature air pump, and the battery is electrically connected to the controller and the miniature air pump, providing power to both. Thus, by operating the control buttons, the miniature air pump can adjust the ventilation volume of the front airbag 13 via the first conduit 301 and the ventilation volume of the rear airbag 16 via the second conduit 302, thereby achieving the shaping and protective support of the knee joint by the knee joint protection device 100 for physical training.

[0044] In this embodiment, the air pump 30 can be secured to the upper fixing ring 611 with a snap-fit ​​mechanism, thereby facilitating the carrying of the air pump and enabling the air pump to maintain the ventilation control of the front airbag 13 and the rear airbag 16. Of course, in other embodiments, the air pump can also be a manual air pump. By setting two manual air pumps to inflate the front airbag 13 and the rear airbag 16 respectively, and by setting two deflation valves to deflate the front airbag 13 and the rear airbag 16 respectively, the ventilation volume of the front airbag 13 and the rear airbag 16 can be independently adjusted and controlled.

[0045] It is understood that, in the implementation of this application, the decision relationship between the ventilation volume of the front airbag 13 and the rear airbag 16 and the knee flexion angle can be set according to the knee flexion angle and the limit shape of the front airbag 13 and the rear airbag 16. That is, a correspondence can be established between the minimum ventilation volume of the front airbag 13 and the maximum ventilation volume of the rear airbag 16, as well as a correspondence with the maximum allowable opening angle of the knee joint. In addition, a correspondence can be established between the maximum ventilation volume of the front airbag 13 and the minimum ventilation volume of the rear airbag 16, as well as a correspondence with the minimum allowable flexion angle of the knee joint. Thus, the change in the knee joint from the minimum flexion angle to the maximum flexion angle can be known, and a functional relationship can be established between the ventilation change of the front airbag 13 and the ventilation change of the rear airbag 16. This facilitates precise control of the ventilation volume of the front airbag 13 and the rear airbag 16, thereby effectively adjusting the flexion angle of the knee joint.

[0046] The knee joint protection device 100 for physical training provided in this application provides frontal protection and positioning of the knee joint through the upper protection position 11, lower protection position 12 and front airbag 13, and rear protection and positioning of the knee joint through the upper support position 14, lower support position 15 and rear airbag 16. The side plate 20 is fixed to the side and is used to support and position the left and right sides of the knee joint, thereby achieving all-round support and limiting protection of the knee joint from front to back and left to right, preventing knee joint dislocation. It also drives the air volume in the front airbag 13 and rear airbag 16 and adjusts the size of the front airbag 13 and rear airbag 16 to change the opening degree of the upper protection position 11 and lower protection position 12, as well as the opening degree of the upper support position 14 and lower support position 15, and shapes the knee joint bending angle, which can adapt to various bending angles of the knee joint.

[0047] The above are preferred embodiments of the application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the application, and these improvements and modifications are also considered to be within the scope of protection of the application.

Claims

1. A knee joint protection device for physical training, characterized in that, The knee joint protection device for physical training includes a flexible sleeve, two opposing side plates, and an air pump. The flexible sleeve has elasticity and is designed to fit over the patient's knee joint, adapting to knee flexion deformation. The flexible sleeve has side portions corresponding to the left and right sides of the knee joint, a front portion corresponding to the front of the knee joint, and a rear portion corresponding to the back of the knee joint. The front portion has an upper protective position and a lower protective position, as well as a front airbag located between the upper and lower protective positions. The rear portion has an upper support position and a lower support position, as well as an airbag located between the upper and lower support positions. The rear airbag, upper protective position, lower protective position, and front airbag together provide frontal protection and positioning for the knee joint, while the upper support position, lower support position, and rear airbag together provide rearal protection and positioning for the knee joint. The side plate is fixed to the side and is used to support and position the left and right sides of the knee joint. The air pump is connected to the front and rear airbags via a pipe. The air pump is used to drive the air volume in the front and rear airbags and adjust the size of the front and rear airbags to change the opening degree of the upper and lower protective positions, as well as the opening degree of the upper and lower support positions, thereby shaping the knee joint flexion angle.

2. The knee joint protection device for physical training according to claim 1, characterized in that, The knee joint protection device for physical training also includes a guard plate assembly and a support plate assembly. The guard plate assembly includes an upper guard plate and a lower guard plate, and the support plate assembly includes an upper support plate and a lower support plate. The upper guard plate is fixed to the upper protection position for protecting and positioning the upper side of the knee, and the lower guard plate is fixed to the lower protection position for protecting and positioning the lower side of the knee. The upper support plate is fixed to the upper support position, and the lower support plate is fixed to the lower support position. The upper support plate is used to support the upper posterior side of the knee joint, and the lower support plate is used to support the lower posterior side of the knee joint.

3. The knee joint protection device for physical training according to claim 2, characterized in that, The side plate, upper guard plate, lower guard plate, upper support plate, and lower support plate are all composed of a rigid plate and an elastic layer that adheres to the inner side of the rigid plate. The rigid plate is adapted to the arc-shaped bending shape of the knee joint, and the elastic layer elastically supports the knee joint.

4. The knee joint protection device for physical training according to claim 2, characterized in that, The side has a circular interlayer space, and the side plate is a clamping plate with a circular outer edge, and the side plate is fixed in the circular interlayer space.

5. The knee joint protection device for physical training according to claim 4, characterized in that, The side of the upper guard plate slides with the edge of the side plate, the side of the lower guard plate slides with the edge of the side plate, the side of the upper support plate slides with the edge of the side plate, and the side of the lower support plate slides with the edge of the side plate. When the front airbag increases ventilation and expands, the airbag drives the upper and lower guard plates to expand around the center of the side plate, while the rear airbag decreases ventilation and contracts, causing the upper and lower support plates to close together around the center of the side plate.

6. The knee joint protection device for physical training according to claim 1, characterized in that, The knee joint protection device for physical training also includes an external support, which includes an upper fixation component, a lower fixation component, and a side rotation axis. The upper fixation component is used to hug the thigh, the lower fixation component is used to hug the calf, and the side rotation axis is connected to the upper fixation component and the lower fixation component, and is also connected to the side plate.

7. The knee joint protection device for physical training according to claim 6, characterized in that, The knee joint protection device for physical training also includes a locking component, which is connected to the side rotation shaft, the upper fixing component, and the lower fixing component, and is used to lock the upper fixing component and the lower fixing component after adjusting their rotation angle.

8. The knee joint protection device for physical training according to claim 7, characterized in that, The side rotating shaft is connected to the side plate on the left and right sides respectively, and the two side rotating shafts are detachably connected to the two side plates respectively.

9. The knee joint protection device for physical training according to claim 7, characterized in that, The upper fixing assembly includes an upper fixing ring and two upper connecting rods fixedly connected to the upper fixing ring. The upper fixing ring is used to wrap around the thigh, and the two upper connecting rods are respectively located on both sides of the thigh. The lower fixing assembly includes a lower fixing ring and two lower connecting rods fixedly connected to the lower fixing ring. The end of the upper connecting rod away from the upper fixing ring is connected to the side rotating shaft, and is rotatably connected to the end of the lower connecting rod away from the lower fixing ring via the side rotating shaft.

10. The knee joint protection device for physical training according to claim 9, characterized in that, The upper fixing ring is provided with an upper tightening band, and the upper tightening band is provided with a first Velcro fastener. The first Velcro fastener is used to adjust the tightness of the upper tightening band. The lower fixing ring is provided with a lower tightening band, and the lower tightening band is provided with a second Velcro fastener. The second Velcro fastener is used to adjust the tightness of the lower tightening band.

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