Novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation

Abstract

The invention relates to the technical field of medical apparatus and instruments, and discloses a novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation, which comprises two thread rotation type height adjusting mechanisms and two thread stress type clamping mechanisms. According to the novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation, the position state of a clamping part can be automatically adjusted according to the specific injured part of a patient, so that the clamping effect is better, in addition, the device uses liquid pressure as a clamping power source, and the device is convenient to use. Meanwhile, the knee joint of the patient is effectively clamped in cooperation with the elastic rubber bag, the characteristic of high fitting degree is achieved, so that the clamping force on the knee joint of the patient is more uniform, and the stress pressure on the knee joint of the patient caused by the liquid pressure in unit area is reduced; and the stability and the safety degree of the clamped bone are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of medical devices, in particular to a novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation. BACKGROUND

[0002] At present, orthoses are often used in hospital orthopedics to fix and orthotize the fracture parts of patients after operation, but the existing lower leg orthoses cannot be adjusted according to the thickness of the lower legs of patients, and need to be customized according to the actual conditions of patients, thereby causing certain resource waste and failing to meet the needs of users.

[0003] Therefore, the Chinese patent with the publication number CN219700235U discloses a novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation, which mainly comprises a first side plate and a second side plate, a first connecting block is arranged on one side of the second side plate, an adjusting assembly is arranged on the side, away from the second side plate, of the first connecting block, the adjusting assembly comprises a groove, a fixing tube and a sliding rod, a groove is formed in the interior of the first connecting block, the inner wall of the groove is fixedly connected with the fixing tube, and the interior of the fixing tube is slidably connected with the sliding rod, the novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation is provided with the adjusting assembly, when medical staff uses the device according to the actual conditions of the legs of patients, first, the screw pipe is rotated to drive the screw rod to move, so that the first side plate and the second side plate move, the space between the first connecting block and the second connecting block is increased, the leg of the patient is placed on one side of the first connecting block and the second connecting block, then the screw pipe is rotated again to drive the screw rod to move, so that the first side plate and the second side plate move towards each other, the soft pad is in close contact with the leg of the patient, after the soft pad is in contact with the leg of the patient, the arc plate is subjected to a certain pressure, when the arc plate is subjected to pressure and moves, the sliding rod can slide in the fixing tube, the spring is compressed, and the soft pad can be in close contact with the leg of the patient to orthotize the leg of the patient.

[0004] However, in the actual clamping process, although the soft pad can better contact the lower leg of the patient, because the structure and shape of the arc plate are fixed, the clamping force of the arc plate on the soft pad is inconsistent, and because the clamping force is inconsistent, the stability of the bone when clamped is poor, and therefore, there is a risk of secondary injury. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation, which can independently adjust the position state of the clamping part according to the specific injured part of the patient, so that the clamping effect is stronger. In addition, the device uses liquid pressure as the power source for clamping, and at the same time cooperates with the elastic rubber capsule to effectively clamp the knee joint of the patient, has the characteristics of high fit degree, so that the clamping force of the clamping force on the knee joint of the patient is more uniform, and the stress intensity caused by the liquid pressure on the knee joint of the patient in unit area is reduced, the stability and safety degree after the bone is clamped are improved, and the above technical problems are solved.

[0006] To achieve the above object, the present application provides the following technical scheme: a novel adjustable knee joint fixing and correcting device for limb fracture rehabilitation, comprising two upper and lower symmetrical left clamping rings, two upper and lower symmetrical right clamping rings, a left flat plate arranged on both sides of the opening end of the left clamping ring, a right flat plate arranged on both sides of the opening end of the right clamping ring, a No. 1 annular embedding groove arranged in the concave surface of the left clamping ring and the right clamping ring, a buffer pad embedded in the No. 1 annular embedding groove, a No. 1 rod body mounting groove arranged on the end face of the left flat plate, and a No. 1 rod body perforation arranged in the right flat plate, further comprising two screw rotation type height adjusting mechanisms, which are internally provided with a longitudinal screw rod rotationally mounted between the two left clamping rings and the two right clamping rings, a longitudinal limiting rod fixedly mounted on one side of the longitudinal screw rod, and a brake ring capable of keeping the longitudinal screw rod stable; and two screw stress type clamping mechanisms, which are internally provided with a middle limiting plate sleeved on the periphery of the longitudinal screw rod and the longitudinal limiting rod and capable of generating a longitudinal movement effect when the longitudinal screw rod rotates, and an elastic rubber capsule located on one side of the middle limiting plate and capable of expanding towards the center line direction of the left clamping ring and the right clamping ring after being subjected to liquid pressure, thereby clamping the knee joint of the patient.

[0007] Preferably, the screw rotation type height adjusting mechanism comprises a side fixing plate, one side of the side fixing plate is provided with an arc-shaped fixing groove fixedly installed on the circumferential side of the two left clamping rings and the two right clamping rings, the inside of the side fixing plate is provided with an annular component installation cavity, the inside of the side fixing plate is provided with a first rod body installation hole communicating with the annular component installation cavity and the outside space, the side fixing plate is provided with a second rod body installation hole on the side of the annular component installation cavity, a longitudinal limiting rod is fixedly installed between the two second rod body installation holes which are longitudinally symmetrical, a longitudinal rotation rod is arranged in the inside of the annular component installation cavity and the first rod body installation hole of the side fixing plate, the corresponding rod body of the longitudinal rotation rod is installed in the inside of the first rod body installation hole through a bearing, a brake ring wrapped around the periphery of the rod body of the longitudinal rotation rod is installed in the inside of the annular component installation cavity of the side fixing plate, longitudinal screw rods are fixedly installed between the opposite ends of the longitudinal rotation rod, the rod body of the longitudinal screw rod is provided with an external thread structure, the other end of the longitudinal rotation rod is provided with an internal hexagonal wrench groove with an internal recess structure.

[0008] Preferably, the brake ring is an annular body structure made of rubber material, and the difference between the inner ring structure radius and the outer ring structure radius of the annular body structure is greater than the difference between the structure radius of the annular component installation cavity and the structure radius of the first rod body installation hole.

[0009] Preferably, the axis of the longitudinal screw rod and the axis of the longitudinal limiting rod are arranged in parallel.

[0010] Preferably, the screw stress type clamping mechanism comprises an arc-shaped clamping plate, the arc-shaped clamping plate is provided with an arc-shaped clamping groove on the end face facing the center line of the left clamping ring and the right clamping ring, the middle part of the convex surface of the arc-shaped clamping plate is provided with a middle limiting plate in a horizontal state, the inside of the middle limiting plate is provided with an internal thread hole through which the longitudinal screw rod penetrates, the plate body of the arc-shaped clamping plate is provided with a limiting sliding hole capable of moving longitudinally along the rod body of the longitudinal limiting rod, the middle limiting plate is provided with an internal thread structure in the inside of the internal thread hole, the inside of the arc-shaped clamping plate is provided with an arc-shaped liquid compression cavity, the inside of the arc-shaped clamping plate is provided with a second annular embedding groove communicating with the arc-shaped clamping groove and the arc-shaped liquid compression cavity, an elastic rubber capsule is embedded in the inside of the second annular embedding groove of the arc-shaped clamping plate in a sealing manner, the inside of the middle limiting plate is provided with a curved liquid flow hole communicating with the outside space and the arc-shaped liquid compression cavity, and a liquid valve core is installed in the inside of the curved liquid flow hole.

[0011] Preferably, the internal thread structure matches the external thread structure in the longitudinal screw rod.

[0012] Preferably, the elastic rubber capsule is a sheet structure made of rubber material with elastic deformation ability.

[0013] Preferably, four negative pressure locking mechanisms are further included, which are internally provided with a horizontal hollow shell fixedly installed at one end surface of the right plane plate, a piston plate placed in the horizontal hollow shell and capable of making the two elastic rubber capsules close to each other after being subjected to gas suction, and a valve plate placed in the horizontal hollow shell and capable of controlling the maximum negative pressure value of the gas, thereby preventing the clamping force from being too large.

[0014] Preferably, the negative pressure locking mechanism includes a horizontal hollow shell, one end of the horizontal hollow shell is provided with an annular fixed plate in an integral structure and fixedly installed at one end surface of the right plane plate, the inside of the horizontal hollow shell is provided with a first component movable cavity, one end of the horizontal hollow shell is provided with a communication with the outside space and a second rod body perforation, the other end of the first component movable cavity is provided with a first gas flow hole, the circumference of the horizontal hollow shell is provided with a second gas flow hole communicating with the outside space and the first gas flow hole, the inside of the second gas flow hole is installed with a gas valve core, one end of the horizontal hollow shell is provided with a second component movable cavity, the inside of the horizontal hollow shell is provided with a third gas flow hole communicating with the outside space and the second component movable cavity, the inside of the horizontal hollow shell is placed with a piston plate capable of moving axially along the first component movable cavity, one end of the piston plate is fixedly installed with a horizontal fastening rod penetrating through the second rod body perforation and the first rod body perforation, the end of the horizontal fastening rod is fixedly installed in the inside of the first rod body installation groove, the inside of the horizontal hollow shell is placed with a valve plate capable of moving axially along the second component movable cavity, the circumference of the valve plate is provided with a plurality of concave structure gas flow grooves, the inside of the horizontal hollow shell is placed with a compressed spiral spring, the spiral spring makes the valve plate abut against the opening end of the third gas flow hole.

[0015] Preferably, the structure radius of the third gas flow hole is smaller than the distance between the gas flow groove and the axis of the third gas flow hole.

[0016] Compared with the prior art, the present application provides a new type of adjustable knee joint fixing and correcting device for four limb fracture rehabilitation, which has the following beneficial effects:

[0017] The position state of the clamping part can be adjusted autonomously according to the specific injured part of the patient, so that the clamping effect is stronger, in addition, the device utilizes liquid pressure as the power source of clamping, and at the same time cooperates with the elastic rubber capsule to effectively clamp the knee joint of the patient, has the characteristics of high adhesion, so that the clamping force of the clamping force on the knee joint of the patient is more uniform, and the stress intensity caused by the liquid pressure in the unit area to the knee joint of the patient is reduced, the stability and safety degree after the bone is clamped are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the present application;

[0019] Figure 2 It is a longitudinal sectional view of the present application;

[0020] Figure 3 It is a transverse sectional view of the present application;

[0021] Figure 4 It is a perspective view of the height adjusting mechanism of the present application;

[0022] Figure 5 It is a perspective view of the height adjusting mechanism of the present application;

[0023] Figure 6 It is a longitudinal sectional view of the clamping mechanism of the present application;

[0024] Figure 7 It is a transverse sectional view of the clamping mechanism of the present application;

[0025] Figure 8 It is a perspective view of the negative pressure locking mechanism of the present application.

[0026] Wherein: 1, left clamping ring; 2, a ring-shaped embedded groove; 3, a buffer pad; 4, a No. 1 rod body mounting groove; 5, a No. 1 rod body through hole; 6, right clamping ring; 7, left plane plate; 8, right plane plate; 9, height adjusting mechanism of screw rotation type; 91, side fixed plate; 92, ring-shaped part mounting cavity; 93, No. 1 rod body mounting hole; 94, No. 2 rod body mounting hole; 95, longitudinal limiting rod; 96, longitudinal threaded rod; 97, external thread structure; 98, longitudinal rotating rod; 99, brake ring; 910, internal hexagonal wrench groove; 911, arc-shaped fixed groove; 10, clamping mechanism of screw stress type; 101, arc-shaped clamping plate; 102, arc-shaped clamping groove; 103, middle limiting plate; 104, internal thread hole; 105, limiting sliding hole; 106, internal thread structure; 107, No. 2 ring-shaped embedded groove; 108, arc-shaped liquid compression cavity; 109, curved liquid flow hole; 1010, liquid valve core; 1011, elastic rubber capsule; 11, negative pressure type locking mechanism; 111, transverse hollow shell; 112, annular fixed plate; 113, No. 1 part movable cavity; 114, No. 2 rod body through hole; 115, No. 1 gas flow hole; 116, No. 2 gas flow hole; 117, gas valve core; 118, No. 2 part movable cavity; 119, valve plate; 1110, No. 3 gas flow hole; 1111, gas flow groove; 1112, spiral spring; 1113, piston plate; 1114, horizontal fastening rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3 , a new adjustable knee joint fixing and correcting device for limb fracture rehabilitation, comprising two upper and lower symmetrically arranged left clamping rings 1, two upper and lower symmetrically arranged right clamping rings 6, left plane plates 7 arranged at both sides of the opening end of the left clamping ring 1, right plane plates 8 arranged at both sides of the opening end of the right clamping ring 6, a No. 1 ring-shaped embedded groove 2 arranged in the concave surface of the left clamping ring 1 and the right clamping ring 6, a buffer pad 3 fixedly embedded in the No. 1 ring-shaped embedded groove 2, a No. 1 rod body mounting groove 4 arranged at the end face of the left plane plate 7, and a No. 1 rod body through hole 5 arranged in the right plane plate, the left clamping ring 1 and the right clamping ring 6 are clamped around the patient's leg, and the buffer pad 3 is in contact with the skin of the patient's leg, thereby achieving preliminary wearing.

[0029] In order to realize the adjustment function of the clamping height, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , two screw rotating height adjustment mechanisms 9 are needed, which are internally provided with a longitudinal screw rod 96 rotatingly installed between the two left clamping rings 1 and the two right clamping rings 6, a longitudinal limiting rod 95 fixedly installed on one side of the longitudinal screw rod 96, and a brake ring 99 capable of keeping the longitudinal screw rod 96 stable. By inserting a hexagonal head wrench into the internal hexagonal wrench groove 910 and then rotating the hexagonal head wrench, the longitudinal rotating rod 98 will drive the longitudinal screw rod 96 to rotate, and the directional rotation of the longitudinal screw rod 96 will drive the middle limiting plate 103 to move longitudinally, thereby driving the elastic rubber capsule 1011 to move longitudinally and moving the elastic rubber capsule 1011 to the patient's knee fracture site, thereby realizing the adjustment function of the clamping height.

[0030] For the specific structure of the screw rotating height adjustment mechanism 9, please refer to Figure 4 and Figure 5 , which includes a side fixing plate 91 provided with an arc-shaped fixing groove 911 fixedly installed on the circumferential side of the two left clamping rings 1 and the two right clamping rings 6, an annular component installation cavity 92 provided in the inside of the side fixing plate 91, a No. 1 rod body installation hole 93 communicating with the annular component installation cavity 92 and the outside space, a No. 2 rod body installation hole 94 provided on one side of the annular component installation cavity 92, a longitudinal limiting rod 95 fixedly installed between two longitudinally symmetrical No. 2 rod body installation holes 94, a longitudinal rotating rod 98 placed in the annular component installation cavity 92 and the No. 1 rod body installation hole 93, a corresponding rod body of the longitudinal rotating rod 98 being installed in the inside of the No. 1 rod body installation hole 93 through a bearing, a brake ring 99 installed in the inside of the annular component installation cavity 92 and wrapping around the rod body of the longitudinal rotating rod 98, in order to realize the necessary brake function, the brake ring 99 needs to be made of a ring body structure of rubber material, and the difference between the inner ring structure radius and the outer ring structure radius of the ring body structure is greater than the difference between the structure radius of the annular component installation cavity 92 and the structure radius of the No. 1 rod body installation hole 93, a longitudinal screw rod 96 fixedly installed between opposite ends of the longitudinal rotating rod 98, the axis of the longitudinal screw rod 96 and the axis of the longitudinal limiting rod 95 being arranged in parallel, the rod body of the longitudinal screw rod 96 being provided with an external thread structure 97, and the other end of the longitudinal rotating rod 98 being provided with an internally recessed hexagonal wrench groove 910.

[0031] In order to achieve the flexible clamping and fixing function of the patient's knee joint, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , two threaded force clamping mechanisms 10 are needed to be set, which are internally provided with a middle limiting plate 103 sleeved on the periphery of the longitudinal threaded rod 96 and the longitudinal limiting rod 95 and capable of moving longitudinally when the longitudinal threaded rod 96 rotates, and an elastic rubber capsule 1011 located on one side of the middle limiting plate 103 and capable of expanding towards the center line direction of the left clamping ring 1 and the right clamping ring 6 after being subjected to liquid pressure, thereby clamping the patient's knee joint. A syringe is used to inject liquid, and the syringe needs to have the function of controlling the pressure of the injected liquid. The syringe is used to inject liquid at a certain pressure into the inside of two curved liquid flow holes 109. Under the pressure of the liquid, the elastic rubber capsule 1011 expands and comes into contact with the patient's knee joint. Then the elastic rubber capsule 1011 deforms adaptively and fits the patient's knee joint. The liquid flow realizes a more closely clamped effect on the patient's knee joint, thereby achieving the flexible clamping and fixing function of the patient's knee joint.

[0032] For the specific structure of the threaded force clamping mechanism 10, please refer to Figure 6 and Figure 7 , including an arc-shaped clamping plate 101, which is provided with an arc-shaped clamping groove 102 on the end face facing the center line of the left clamping ring 1 and the right clamping ring 6, and a middle limiting plate 103 is provided in the middle of the convex surface of the arc-shaped clamping plate 101 in a horizontal state, an inner threaded hole 104 is provided in the inside of the middle limiting plate 103 and penetrated by the longitudinal threaded rod 96, a limiting sliding hole 105 is provided in the plate body of the arc-shaped clamping plate 101 and capable of moving longitudinally along the rod body of the longitudinal limiting rod 95, an inner threaded structure 106 is provided in the inside of the middle limiting plate 103, in order to realize the matching relationship of the threaded structure, the inner threaded structure 106 needs to match the outer threaded structure 97 in the longitudinal threaded rod 96, an arc-shaped liquid compression cavity 108 is provided in the inside of the arc-shaped clamping plate 101, a No. 2 annular embedded groove 107 is provided in the arc-shaped clamping plate 101 and communicates the arc-shaped clamping groove 102 and the arc-shaped liquid compression cavity 108, an elastic rubber capsule 1011 is embedded in the inside of the No. 2 annular embedded groove 107 in a sealing manner, in order to realize the elastic deformation contact ability, the elastic rubber capsule 1011 needs to be made of a sheet structure of rubber material with elastic deformation ability, a curved liquid flow hole 109 is provided in the inside of the middle limiting plate 103 and communicates the outside space and the arc-shaped liquid compression cavity 108, and a liquid valve core 1010 is installed in the inside of the curved liquid flow hole 109.

[0033] In order to achieve the controllable clamping force of the initial clamping effect, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 , four negative pressure locking mechanism 11 is needed to be set, which is internally provided with a fixedly installed horizontal hollow shell 111 on one end surface of the right plane plate 8, a piston plate 1113 placed in the horizontal hollow shell 111 and making the two elastic rubber capsules 1011 close to each other after being affected by the gas suction force, and a valve plate 119 placed in the horizontal hollow shell 111 and capable of controlling the maximum negative pressure value of the gas, thereby preventing the phenomenon of excessive clamping force from occurring. The negative pressure locking mechanism 11 is used in cooperation with the air extraction device. The air extraction head of the air extraction device is inserted into the second gas flow hole 116, and then the air extraction device is started. At this time, the gas in the first component movable cavity 113 is extracted, and under the influence of the negative pressure of the gas, the piston plate 1113 moves towards the first gas flow hole 115, thereby driving the two arc-shaped clamping plates 101 to move towards the patient's knee joint, and making the left clamping ring 1 and the right clamping ring 6 close to each other, until the buffer pad 3 is clamped on the patient's leg. Due to the further increase of the suction force, the buffer pad 3 will be stably clamped on the patient's leg. When the negative pressure value is greater than the elastic strength of the spiral spring 1112, the spiral spring 1112 will be compressed, and the external gas can flow into the first component movable cavity 113 through the gap, thereby compensating the gas in time, preventing the phenomenon of excessive clamping strength caused by excessive negative pressure of the gas, and preventing the secondary injury phenomenon caused by excessive clamping force from occurring.

[0034] For the specific structure of the negative pressure locking mechanism 11, please refer to Figure 8, including a transverse hollow shell 111, one end of the transverse hollow shell 111 is provided with an annular fixed plate 112 which is of integral structure with the transverse hollow shell 111 and is fixedly installed on one end face of the right plane plate 8, the inside of the transverse hollow shell 111 is provided with a first component movable cavity 113, the transverse hollow shell 111 is provided with a second rod body through hole 114 which is communicated with the outside space and is located at one end of the first component movable cavity 113, the first component movable cavity 113 is provided with a first gas flow hole 115 which is located at the other end, the circumference of the transverse hollow shell 111 is provided with a second gas flow hole 116 which is communicated with the outside space and the first gas flow hole 115, the inside of the second gas flow hole 116 is installed with a gas valve core 117, the transverse hollow shell 111 is provided with a second component movable cavity 118 which is located at one end of the first gas flow hole 115, the inside of the transverse hollow shell 111 is provided with a third gas flow hole 1110 which is communicated with the outside space and the second component movable cavity 118, the inside of the transverse hollow shell 111 is placed with a piston plate 1113 which can move axially along the first component movable cavity 113, one end of the piston plate 1113 is fixedly installed with a horizontal fastening rod 1114 which penetrates through the second rod body through hole 114 and the first rod body through hole 5, the end of the horizontal fastening rod 1114 is fixedly installed in the inside of the first rod body installation slot 4, the inside of the transverse hollow shell 111 is placed with a valve plate 119 which can move axially along the second component movable cavity 118, the circumference of the valve plate 119 is provided with a plurality of concave structure gas flow grooves 1111, the inside of the transverse hollow shell 111 is placed with a spiral spring 1112 which is in a compressed state and is located at the inside of the second component movable cavity 118, the spiral spring 1112 makes the valve plate 119 abut against the opening end of the third gas flow hole 1110, in order to realize the closing function of the gas, it is required that the structural radius of the third gas flow hole 1110 is smaller than the distance between the gas flow groove 1111 and the axis line of the third gas flow hole 1110.

[0035] The specific working principle of the present application is that the left clamping ring 1 and the right clamping ring 6 are clamped on the periphery of the patient's leg, and the air extraction equipment is used in cooperation, the air extraction head of the air extraction equipment is inserted into the second gas flow hole 116, and then the air extraction equipment is started, at this time, the gas in the inside of the first component movable cavity 113 is extracted, under the influence of the gas negative pressure, the piston plate 1113 moves towards the first gas flow hole 115, thereby driving the two arc-shaped clamping plates 101 to move towards the patient's leg and making the left clamping ring 1 and the right clamping ring 6 close to each other until the buffer pad 3 is clamped on the patient's leg.

[0036] By means of the hexagonal head spanner, inserted into the interior hexagonal spanner slot 910, and then directional rotation of the hexagonal head spanner, at this time, the longitudinal rotation rod 98 will drive the longitudinal threaded rod 96 to rotate, and the directional rotation of the longitudinal threaded rod 96 will drive the middle limiting plate 103 to move longitudinally, thereby driving the elastic rubber capsule 1011 to move longitudinally, so that the elastic rubber capsule 1011 moves to the fractured part of the knee joint of the patient;

[0037] In cooperation with a liquid injection syringe, and the syringe needs to have the function of controlling the pressure of the injected liquid, using the syringe, respectively inject the interior of the two curved liquid flow holes 109 with liquid at a constant pressure, under the pressure of the liquid, the elastic rubber capsule 1011 expands and is in contact with the knee joint of the patient, and then the elastic rubber capsule 1011 deforms adaptively and is attached to the knee joint of the patient, and the flowability of the liquid is used to achieve a more tightly clamped effect of the knee joint of the patient.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel adjustable knee joint fixation and correction device for limb fracture rehabilitation, comprising two left clamping rings (1) symmetrically arranged above and below, two right clamping rings (6) symmetrically arranged above and below, a left flat plate (7) disposed on both sides of the opening end of the left clamping ring (1), a right flat plate (8) disposed on both sides of the opening end of the right clamping ring (6), a first annular embedding groove (2) disposed on the concave surface of the left clamping ring (1) and the right clamping ring (6), a buffer pad (3) fixedly embedded in the first annular embedding groove (2), a first rod mounting groove (4) disposed on the end face of the left flat plate (7), and a first rod through hole (5) disposed in the right flat plate, characterized in that: Also includes, Two screw rotation type height adjustment mechanism (9), which is internally provided with a longitudinal screw rod (96) rotatably mounted between the two left clamping rings (1) and the two right clamping rings (6), a longitudinal limiting rod (95) fixedly mounted on one side of the longitudinal screw rod (96), and a brake ring (99) capable of keeping the longitudinal screw rod (96) stable; And two screw stress type clamping mechanism (10), which is internally provided with a middle limiting plate (103) sleeved on the periphery of the longitudinal screw rod (96) and the longitudinal limiting rod (95) and capable of generating a longitudinal movement effect when the longitudinal screw rod (96) rotates, and an elastic rubber capsule (1011) located on one side of the middle limiting plate (103) and capable of expanding towards the center line direction of the left clamping ring (1) and the right clamping ring (6) after being subjected to liquid pressure, thereby clamping the patient's knee joint.

2. The adjustable knee joint fixing and correcting device for four limbs fracture rehabilitation according to claim 1, characterized in that: The screw rotation type height adjustment mechanism (9) comprises a side fixed plate (91), one side of the side fixed plate (91) is provided with an arc-shaped fixed groove (911) fixedly mounted on the circumferential side of the two left clamping rings (1) and the two right clamping rings (6), the inside of the side fixed plate (91) is provided with an annular component mounting cavity (92), the inside of the side fixed plate (91) is provided with a No. 1 rod body mounting hole (93) communicating with the annular component mounting cavity (92) and the outside space, the side fixed plate (91) is provided with a No. 2 rod body mounting hole (94) on one side of the annular component mounting cavity (92), one longitudinal limiting rod (95) is fixedly mounted between two longitudinally symmetrical No. 2 rod body mounting holes (94), the side fixed plate (91) is provided with a longitudinal rotating rod (98) inside the annular component mounting cavity (92) and the No. 1 rod body mounting hole (93), the corresponding rod body of the longitudinal rotating rod (98) is mounted inside the No. 1 rod body mounting hole (93) through a bearing, the side fixed plate (91) is provided with a brake ring (99) wrapped around the rod body of the longitudinal rotating rod (98) inside the annular component mounting cavity (92), the longitudinal rotating rod (98) is fixedly mounted with a longitudinal screw rod (96) between opposite ends, the rod body of the longitudinal screw rod (96) is provided with an external thread structure (97), the other end of the longitudinal rotating rod (98) is provided with an internal hexagonal wrench groove (910) with an internal recess structure.

3. The adjustable knee joint fixing and correcting device for four limbs fracture rehabilitation of claim 2, characterized in that: The brake ring (99) is an annular body structure made of rubber material, and the difference between the inner ring structure radius and the outer ring structure radius of the annular body structure is greater than the difference between the structure radius of the annular component mounting cavity (92) and the structure radius of the No. 1 rod body mounting hole (93).

4. The adjustable knee joint fixing and correcting device for four limbs fracture rehabilitation of claim 2, characterized in that: The axis of the longitudinal screw rod (96) and the axis of the longitudinal limiting rod (95) are arranged in parallel.

5. The adjustable knee joint fixation and correction device for limb fracture rehabilitation according to claim 4, characterized in that: The threaded force type clamping mechanism (10) comprises an arc-shaped clamping plate (101), which is provided with an arc-shaped clamping groove (102) on an end face facing the center line of the left clamping ring (1) and the right clamping ring (6), the outer convex surface of the arc-shaped clamping plate (101) is provided with a middle limiting plate (103) in a horizontal state, the inside of the middle limiting plate (103) is provided with an internal thread hole (104) through which a longitudinal threaded rod (96) penetrates, the plate body of the arc-shaped clamping plate (101) is provided with a limiting sliding hole (105) capable of moving longitudinally along the rod body of the longitudinal limiting rod (95), the inside of the middle limiting plate (103) is provided with an internal thread structure (106) inside the internal thread hole (104), the inside of the arc-shaped clamping plate (101) is provided with an arc-shaped liquid compression cavity (108), the inside of the arc-shaped clamping plate (101) is provided with a No. 2 annular embedded groove (107) communicating the arc-shaped clamping groove (102) and the arc-shaped liquid compression cavity (108), the arc-shaped clamping plate (101) is embedded with an elastic rubber capsule (1011) in a sealing manner inside the No. 2 annular embedded groove (107), the inside of the middle limiting plate (103) is provided with a curved liquid flow hole (109) communicating the outside space and the arc-shaped liquid compression cavity (108), and the inside of the curved liquid flow hole (109) is mounted with a liquid valve core (1010).

6. The adjustable knee joint fixation and correction device for limb fracture rehabilitation according to claim 5, characterized in that: The internal thread structure (106) is matched with an external thread structure (97) in the longitudinal threaded rod (96).

7. The adjustable knee joint fixation and correction device for limb fracture rehabilitation of claim 5, characterized in that: The elastic rubber capsule (1011) is a sheet structure made of rubber material with elastic deformation ability.

8. The adjustable knee joint fixing and correcting device for four limbs fracture rehabilitation of any one of claims 1-7, characterized in that: It also comprises four negative pressure type locking mechanisms (11), which are internally provided with a horizontal hollow shell (111) fixedly installed on one end face of the right plane plate (8), a piston plate (1113) placed inside the horizontal hollow shell (111) and capable of making two elastic rubber capsules (1011) close to each other after being subjected to gas suction force, and a valve plate (119) placed inside the horizontal hollow shell (111) and capable of controlling the maximum negative pressure value of the gas, thereby preventing the phenomenon of excessive clamping force from occurring.

9. The adjustable knee joint fixation and correction device for limb fracture rehabilitation of claim 8, characterized in that: The negative pressure locking mechanism (11) comprises a transverse hollow shell (111), one end of the transverse hollow shell (111) is provided with an annular fixed plate (112) which is of integral structure with the transverse hollow shell (111) and is fixedly installed on one end surface of the right plane plate (8), the inside of the transverse hollow shell (111) is provided with a first component movable cavity (113), the transverse hollow shell (111) is provided with a second rod body through hole (114) which is communicated with the outside space at one end of the first component movable cavity (113), the other end of the first component movable cavity (113) is provided with a first gas flow hole (115), the circumference of the transverse hollow shell (111) is provided with a second gas flow hole (116) which is communicated with the outside space and the first gas flow hole (115), the inside of the second gas flow hole (116) is installed with a gas valve core (117), the transverse hollow shell (111) is provided with a second component movable cavity (118) at one end of the first gas flow hole (115), the inside of the transverse hollow shell (111) is provided with a third gas flow hole (1110) which is communicated with the outside space and the second component movable cavity (118), the inside of the transverse hollow shell (111) is arranged with a piston plate (1113) which can move axially along the first component movable cavity (113), one end of the piston plate (1113) is fixedly installed with a horizontal fastening rod (1114) which penetrates through the second rod body through hole (114) and the first rod body through hole (5), the end of the horizontal fastening rod (1114) is fixedly installed in the inside of the first rod body installation slot (4), the inside of the transverse hollow shell (111) is arranged with a valve plate (119) which can move axially along the second component movable cavity (118) at the inside of the second component movable cavity (118), the circumference of the valve plate (119) is provided with a plurality of concave structure gas flow grooves (1111), the inside of the transverse hollow shell (111) is arranged with a compressed spiral spring (1112) at the inside of the second component movable cavity (118), the spiral spring (1112) makes the valve plate (119) abut against the opening end of the third gas flow hole (1110).

10. The adjustable knee joint fixation and correction device for limb fracture rehabilitation according to claim 9, characterized in that: The structural radius of the third gas flow hole (1110) is smaller than the distance between the gas flow groove (1111) and the axis line of the third gas flow hole (1110).

Images