Postoperative lower limb rehabilitation training device for cardiac surgery

Abstract

The invention provides a post-cardiac-surgery lower limb rehabilitation training device. The post-cardiac-surgery lower limb rehabilitation training device comprises a bed body, a back plate, a fixing mechanism and a training mechanism. A patient sits on the bed body, treads on the pedals with both feet and leans against the back plate between the two groups of clamping plates to lie down, so that the back plate is pressed to rotate downwards close to the bed body, the first spring is pressed to contract, the back plate rotates close to the bed body, and the two groups of clamping plates are driven to move close to each other through the first transmission assembly, so that the patient can be clamped and fixed; the patient gets up to cancel the pressure on the back plate, the back plate can rotate away from the bed body through the counter-acting force of the first spring, the two clamping plates are driven by the first transmission assembly to move away from each other to cancel clamping and fixing on the patient, and the body of the patient can be fixed in advance through the lying action before training; displacement caused by training counter-acting force is avoided, the training effect is ensured, the back plate can assist the patient in lying down and getting up, physical exhaustion of the patient in autonomously getting up is reduced, and the requirements of the weak patient after the cardiac surgery are met.

Description

TECHNICAL FIELD

[0001] The present application relates to a lower limb rehabilitation training device after extracardiac surgery. BACKGROUND

[0002] Extracardiac surgery usually uses general anesthesia, and long-term bed rest of patients after surgery can cause slow blood flow in the lower limbs, blood stasis, and is extremely prone to induce deep vein thrombosis. Lower limb rehabilitation training (such as lower limb flexion and extension movement, ankle pump movement) can produce a "squeezing pump" effect on the lower limb veins through muscle contraction and relaxation, promote venous blood backflow to the heart, reduce the risk of thrombosis, and also reduce the fatal complication of pulmonary embolism caused by thrombus detachment.

[0003] For example, the Chinese patent with application number 202410778201.8 discloses a rehabilitation device for extracardiac surgery, which includes a bed body support, a fixed bed plate provided on the bed body support, a rotating bed plate rotationally connected with the fixed bed plate, a leg training mechanism provided on the fixed bed plate, a handrail provided on the rotating bed plate, a holding fixing mechanism rotationally connected with the handrail, and a linkage mechanism provided between the leg training mechanism and the holding fixing mechanism.

[0004] When performing lower limb flexion and extension training, the patient's body is usually fixed to avoid displacement. The prior art usually fixes the patient's body during lower limb flexion and extension training, but this method is prone to cause displacement of the patient's body due to training reaction force, and then the patient's body is fixed, which makes subsequent training inconvenient and reduces the training effect. Therefore, in view of the above technical problems, a lower limb rehabilitation training device after extracardiac surgery is proposed. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a lower limb rehabilitation training device after extracardiac surgery, which can fix the patient's body in advance before training to avoid displacement due to training reaction force and ensure training efficiency.

[0006] A lower limb rehabilitation training device after extracardiac surgery, comprising: a bed body; a back plate rotationally arranged at the top end of the bed body along the width axis of the bed body, and a first spring connected between the bottom end and the bed body for driving the back plate to rotate away from the bed body; a fixing mechanism including a clamping plate and a first transmission assembly, the back plate top end oppositely provided with two groups of clamping plates sliding along the width direction of the bed body, the first transmission assembly connected with the bed body, the back plate and the two groups of clamping plates, for converting the rotation of the back plate away from or close to the bed body into the relative movement of the two groups of clamping plates away from or close to each other; and The training mechanism comprises a mounting rod, a pedal and a resistance assembly, the mounting rod is slidably arranged at the top end of the bed body along the length direction of the bed body, pedals are arranged at both ends of the mounting rod, and the resistance assembly is connected between the mounting rod and the bed body to provide resistance when the mounting rod slides away from the back plate The heart surgery postoperative lower limb rehabilitation training device has the following beneficial effects: In use, the patient sits on the bed body with his feet on the pedals and lies down with his back on the back plate between the two sets of clamping plates, at this time, the back plate is pressed to rotate downward and close to the bed body, and the first spring is compressed and retracted, the back plate rotates close to the bed body to drive the two sets of clamping plates to move close to each other through the first transmission assembly to clamp and fix the patient, conversely, the patient gets up to cancel the pressure on the back plate, the reaction force of the first spring can make the back plate rotate away from the bed body, and the two sets of clamping plates move away from each other through the first transmission assembly to cancel the clamping and fixing of the patient, which is convenient for fixing the patient's body in advance through the lying action before training to avoid displacement caused by the training reaction force, ensures the training efficiency, and the back plate can assist the patient to lie down and get up, reduces the physical consumption of the patient's self-standing, and meets the needs of patients with weak bodies after heart surgery.

[0007] In one of the embodiments, the first transmission assembly comprises a bidirectional screw, a first gear and an arc-shaped gear rack; a first sliding groove is formed at the top end of the back plate, the bottom ends of the two sets of clamping plates are slidably arranged in the first sliding groove along the width direction of the bed body, the bidirectional screw is rotatably arranged in the first sliding groove and is threadedly connected with the two sets of clamping plates at both ends, the first gear is coaxially arranged at one end of the bidirectional screw, the arc-shaped gear rack is arranged on the bed body and is coaxial with the rotation shaft of the back plate, and the arc-shaped gear rack is engaged with the first gear.

[0008] In one of the embodiments, the first gear is coaxially and rotatably sleeved at one end of the bidirectional screw, a plurality of mounting holes are formed in the circumferential side of one end of the bidirectional screw along the circumferential direction, a plurality of ball head pins are slidably arranged in the plurality of mounting holes, the second springs are connected with the bottom surfaces of the plurality of ball head pins and the mounting holes, a plurality of ball head grooves are formed in the inner side of the first gear along the circumferential direction, and the ball heads of the plurality of ball head pins are respectively clamped in the plurality of ball head grooves.

[0009] In one of the embodiments, the resistance assembly comprises a guide shaft and a third spring; a second sliding groove is formed at the top end of the bed body; the guide shaft is slidably arranged in the second sliding groove along the length direction of the bed body, a connecting frame is arranged at the end of the guide shaft close to the back plate, a connecting block is arranged on the mounting rod and penetrates through the connecting frame, and the third spring is sleeved on the guide shaft and abuts against the connecting frame and one end of the second sliding groove at both ends.

[0010] In one of the embodiments, the training mechanism further comprises an adjusting assembly; the resistance assembly is arranged in multiple groups along the vertical direction; the connecting block is slidingly arranged on the mounting rod along the vertical direction; the connecting block is slidingly arranged in the connecting frame of the adjusting assembly in sequence; the adjusting assembly connects the mounting rod and the connecting block, and is used for driving the connecting block to slide.

[0011] In one of the embodiments, the adjusting assembly comprises an adjusting screw; the mounting rod is vertically provided with a third sliding groove penetrating therethrough; the connecting block is slidingly arranged in the third sliding groove along the vertical direction; the adjusting screw is arranged along the vertical direction and is rotatably arranged in the third sliding groove and is threadedly connected with the connecting block.

[0012] In one of the embodiments, the adjusting assembly further comprises a treadle, a first bevel gear and a second bevel gear; the treadle is rotatably arranged on the mounting rod and has one end facing the back plate; the other end of the treadle is coaxially provided with the first bevel gear; the top end of the adjusting screw is coaxially provided with the second bevel gear; the second bevel gear is engaged with the first bevel gear.

[0013] In one of the embodiments, the two groups of treadles are provided with massage mechanisms; the massage mechanism comprises a cam and a second transmission assembly; the treadle is provided with a mounting groove on the side away from the back plate; multiple groups of rotatable cams are arranged in the mounting groove along the vertical direction; the treadle is provided with multiple groups of through grooves in communication with the mounting groove on the side facing the back plate; the multiple groups of through grooves correspond to the multiple groups of cams in one-to-one correspondence; the second transmission assembly is arranged on the treadle and connects the bed body and the multiple groups of cams, and is used for converting the sliding of the mounting rod into the reciprocating swing of the multiple groups of cams, so that the circumferential side of the multiple groups of cams can protrude from the side of the treadle facing the back plate or retract into the mounting groove.

[0014] In one of the embodiments, the second transmission assembly comprises a second gear and an adjusting rack; one end of the multiple groups of cams is coaxially provided with the second gear; the adjusting rack is slidingly arranged on the side of the treadle along the vertical direction and is engaged with the multiple groups of second gears; the adjusting rack is provided with a lever on one side; the top end of the bed body is provided with a guide plate; the guide plate is provided with a wave-shaped guide groove; the lever is slidingly arranged in the wave-shaped guide groove along the length direction of the wave-shaped guide groove.

[0015] In one of the embodiments, the opposite sides of the two groups of clamping plates are detachably provided with soft pads. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application, the drawings required to be used in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual proportion.

[0017] Figure 1 A perspective structural schematic view of a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 2 A perspective structural schematic view of a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 1 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery is shown in the figure. Figure 3 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 1 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 4 Figure 1 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 5 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 1 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure. Figure 6 Figure 1 An exploded view of a fixing mechanism in a lower limb rehabilitation training device after cardiac surgery provided by an embodiment of the present application is shown in the figure.

[0018] Reference signs: 10, bed body; 101, second sliding groove; 20, back plate; 201, first spring; 202, first sliding groove; 203, arc-shaped guide rod; 30, clamping plate; 301, bidirectional screw; 3011, mounting hole; 302, first gear; 3021, ball head groove; 303, arc-shaped rack; 304, ball head pin; 305, second spring; 306, soft pad; 40, mounting rod; 401, pedal; 4011, mounting groove; 4012, through groove; 402, guide shaft; 4021, connecting frame; 403, third spring; 404, connecting block; 405, third sliding groove; 50, adjusting screw; 501, pedal disc; 502, first bevel gear; 503, second bevel gear; 60, cam; 601, second gear; 602, adjusting rack; 603, push rod; 604, guide plate; 605, wave-shaped guide groove. Specific embodiments

[0019] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.​​

[0020] Referring to Figure 1 and Figure 2 In an embodiment, a post-cardiac surgery lower limb rehabilitation training device includes a bed body 10, a backboard 20, a fixing mechanism and a training mechanism. The backboard 20 is rotatably arranged at the top end of the bed body 10 along the width direction of the bed body 10, and a first spring 201 is connected between the bottom end of the backboard 20 and the bed body 10 for driving the backboard 20 to rotate away from the bed body 10. The fixing mechanism includes clamping plates 30 and a first transmission assembly. The top end of the backboard 20 is oppositely provided with two groups of clamping plates 30 sliding along the width direction of the bed body 10. The first transmission assembly is connected to the bed body 10, the backboard 20 and the two groups of clamping plates 30, and is used for converting the rotation of the backboard 20 to close or away from the bed body 10 into the relative close or away movement of the two groups of clamping plates 30. The training mechanism includes a mounting rod 40, a pedal 401 and a resistance assembly. The mounting rod 40 is slidingly arranged at the top end of the bed body 10 along the length direction of the bed body 10. The pedal 401 is arranged at both ends of the mounting rod 40. The resistance assembly is connected to the mounting rod 40 and the bed body 10, and is used for providing resistance when the mounting rod 40 slides away from the backboard 20.

[0021] In the above embodiment, when in use, the patient sits on the bed body 10 with his feet stepping on the pedals 401, and lies down with his back between the two groups of clamping plates 30 and against the backboard 20. At this time, the backboard 20 is pressed to rotate downward and close to the bed body 10, and the first spring 201 is compressed. The rotation of the backboard 20 close to the bed body 10 drives the two groups of clamping plates 30 to relatively close to each other through the first transmission assembly, so as to clamp and fix the patient. Conversely, when the patient gets up and cancels the pressure on the backboard 20, the reaction force of the first spring 201 can make the backboard 20 rotate away from the bed body 10, and drive the two groups of clamping plates 30 to relatively move away from each other through the first transmission assembly, so as to cancel the clamping and fixing of the patient. This facilitates the fixation of the patient's body through lying down before training, avoids displacement due to training reaction force, ensures training efficiency, and reduces the physical consumption of the patient's self-standing. Finally, the lower limb flexion and extension training can be performed by stepping on the pedals 401. It can be understood that the rotation of the backboard 20 downward and close to the bed body 10 can make the top surface of the backboard 20 flush with the top surface of the bed body 10.

[0022] Specific to the above embodiment, the bottom end of the back plate 20 is provided with two groups of arc-shaped guide rods 203 coaxial with the rotation axis of the back plate 20, the bottom ends of the two groups of arc-shaped guide rods 203 slide through the bed body 10, and a limiting block is arranged, the first spring 201 is sleeved on the two groups of arc-shaped guide rods 203, and the two ends of the first spring 201 abut against the bottom end of the back plate 20 and the bed body 10 respectively. By setting the arc-shaped guide rod 203 and the limiting block in cooperation, the back plate 20 can be prevented from being excessively turned up under the action of the first spring 201, and the arc-shaped guide rod 203 can guide the extension and contraction of the first spring 201, thereby prolonging the service life of the first spring 201.

[0023] Specific to the above embodiment, two groups of first T-shaped sliding blocks are arranged on the mounting rod 40, and two groups of first T-shaped sliding grooves are arranged at the top end of the bed body 10, and the two groups of first T-shaped sliding blocks are slidably arranged in the two groups of first T-shaped sliding grooves along the length direction of the bed body 10. The stability of the sliding of the mounting rod 40 is ensured.

[0024] Please refer to Figure 1 and Figure 2 In an embodiment, the first transmission assembly includes a bidirectional screw 301, a first gear 302 and an arc-shaped rack 303; the top end of the back plate 20 is provided with a first sliding groove 202, the bottom ends of the two groups of clamping plates 30 are slidably arranged in the first sliding groove 202 along the width direction of the bed body 10, the bidirectional screw 301 is rotatably arranged in the first sliding groove 202, and the two ends thereof are threadedly connected with the two groups of clamping plates 30 respectively, the first gear 302 is coaxially arranged at one end of the bidirectional screw 301, the arc-shaped rack 303 is arranged on the bed body 10 and coaxial with the rotation axis of the back plate 20, and the arc-shaped rack 303 is engaged with the first gear 302.

[0025] In the above embodiment, the rotation of the back plate 20 downwardly close to the bed body 10 drives the revolution of the first gear 302, the revolution of the first gear 302 engages with the arc-shaped rack 303 to drive the rotation of the first gear 302, the rotation of the first gear 302 drives the rotation of the bidirectional screw 301, and the rotation of the bidirectional screw 301 engages with the two groups of clamping plates 30 to drive the two groups of clamping plates 30 to move relatively close to each other, and vice versa, the rotation of the back plate 20 upwardly away from the bed body 10 drives the first gear 302 to rotate reversely to drive the bidirectional screw 301 to rotate reversely, so as to drive the two groups of clamping plates 30 to move relatively away from each other, thereby converting the rotation of the back plate 20 close to or away from the bed body 10 into the movement of the two groups of clamping plates 30 relatively close to or away from each other.

[0026] Please refer to Figure 3On the basis of the above embodiment, further, the first gear 302 is coaxially rotatable sleeved at one end of the bidirectional screw rod 301, a plurality of groups of mounting holes 3011 are formed in the circumferential direction of the one end of the bidirectional screw rod 301, a plurality of groups of ball head pins 304 are slidably arranged in the plurality of groups of mounting holes 3011, the plurality of groups of ball head pins 304 and the bottom surfaces of the mounting holes 3011 are connected with the second springs 305, a plurality of groups of ball head grooves 3021 are formed in the circumferential direction of the inner side of the first gear 302, and the ball heads of the plurality of groups of ball head pins 304 are respectively clamped in the plurality of groups of ball head grooves 3021.

[0027] In the above embodiment, when the back plate 20 is rotated downward to approach the bed body 10 to drive the first gear 302 to rotate, the first gear 302 rotates to drive the bidirectional screw rod 301 to rotate through the plurality of groups of ball head pins 304, when the bidirectional screw rod 301 rotates to relatively approach the two groups of clamping plates 30 to move to clamp and fix the patient's body, the two groups of clamping plates 30 stop moving and the bidirectional screw rod 301 stops rotating, at this time, the first gear 302 rotates and the ball head pin 304 is separated from the ball head groove 3021, the back plate 20 can continue to rotate downward to make the patient lie down, thereby facilitating automatic adaptation to patients of different body types for use, and improving the practicality of the device.

[0028] Please refer to Figure 1 and Figure 4 In an embodiment, the resistance assembly includes a guide shaft 402 and a third spring 403; the bed body 10 is provided with a second sliding groove 101 at the top end; the guide shaft 402 is slidably arranged in the second sliding groove 101 in the length direction of the bed body 10, the end of the guide shaft 402 close to the back plate 20 is provided with a connecting frame 4021, the mounting rod 40 is provided with a connecting block 404, the connecting block 404 is arranged in the connecting frame 4021, the third spring 403 is sleeved on the guide shaft 402, and the two ends of the third spring 403 abut against the connecting frame 4021 and one end of the second sliding groove 101 respectively.

[0029] In the above embodiment, during training, the patient drives the mounting rod 40 to slide by stepping on the pedal 401, the mounting rod 40 slides to drive the guide shaft 402 to move and press the third spring 403 through the cooperation of the connecting block 404 and the connecting frame 4021, at this time, the third spring 403 can generate resistance in the process of the patient's leg stretching movement, and the reaction force of the third spring 403 can drive the mounting rod 40 to slide reversely to reset in the process of the patient's leg bending, thereby facilitating the patient to repeatedly perform the lower limb flexion and extension training.

[0030] On the basis of the above embodiment, further, the training mechanism further includes an adjusting assembly; a plurality of groups of resistance assemblies are arranged in the vertical direction, the connecting block 404 is slidably arranged on the mounting rod 40 in the vertical direction, the connecting block 404 can be sequentially arranged in the connecting frames 4021 in the plurality of groups of adjusting assemblies by sliding, the adjusting assembly connects the mounting rod 40 and the connecting block 404, and is used for driving the connecting block 404 to slide.

[0031] In the above embodiment, by adjusting the sliding of the connecting block 404 driven by the adjusting assembly, it can be understood that the sliding of the connecting block 404 downward can increase the number of groups connected with the connecting frame 4021, thereby increasing the resistance during the leg stretching movement, and vice versa, the sliding of the connecting block 404 upward can reduce the number of groups connected with the connecting frame 4021, thereby reducing the resistance of the leg stretching movement, which facilitates the adjustment according to the training needs of the patient and improves the practicability of the device.

[0032] Please refer to Figure 5 In an embodiment, the adjusting assembly includes an adjusting screw 50; a third sliding groove 405 is vertically and throughly formed at the top end of the mounting rod 40, the connecting block 404 is vertically and slidably arranged in the third sliding groove 405, the adjusting screw 50 is arranged in the vertical direction and rotatably arranged in the third sliding groove 405 and threadedly connected with the connecting block 404. By rotating the adjusting screw 50 and threadedly cooperating with the connecting block 404, the connecting block 404 can be driven to move, and the movement of the connecting block 404 is convenient.

[0033] Based on the above embodiment, further, the adjusting assembly further includes a treadle 501, a first bevel gear 502 and a second bevel gear 503; the treadle 501 is rotatably arranged on the mounting rod 40 and has one end facing the back plate 20, the other end of the treadle 501 coaxially has the first bevel gear 502, the top end of the adjusting screw 50 coaxially has the second bevel gear 503, and the second bevel gear 503 is engaged with the first bevel gear 502.

[0034] In the above embodiment, in use, the patient steps on the treadle 501 and rotates the treadle 501, the rotation of the treadle 501 drives the adjusting screw 50 through the engagement of the first bevel gear 502 and the second bevel gear 503, which facilitates the adjustment of the training resistance in the lying position of the patient, and the adjustment is convenient. Further, the number of teeth of the first bevel gear 502 is greater than the number of teeth of the second bevel gear 503, which is more convenient for driving the adjusting screw 50 to rotate and adjusting the training resistance.

[0035] Please refer to Figure 5 and Figure 6 In an embodiment, the two groups of treadles 401 are provided with massage mechanisms, the massage mechanism includes a cam 60 and a second transmission assembly, the treadle 401 is provided with a mounting groove 4011 on the side away from the back plate 20, a plurality of rotatable cams 60 are arrayed in the vertical direction in the mounting groove 4011, the side of the treadle 401 facing the back plate 20 is provided with a plurality of through grooves 4012 in communication with the mounting groove 4011, the plurality of through grooves 4012 correspond to the plurality of cams 60 one by one, the second transmission assembly is arranged on the treadle 401 and connects the bed body 10 and the plurality of cams 60, and is used for converting the sliding of the mounting rod 40 into the reciprocating swing of the plurality of cams 60, so that the plurality of cams 60 can protrude from the side of the treadle 401 facing the back plate 20 or retract into the mounting groove 4011 through the through groove 4012.

[0036] In the above embodiment, when the patient pedals the pedal 401 to perform the flexion and extension training of the lower limbs, the mounting rod 40 slides the cylinder second transmission assembly to drive the plurality of cams 60 to reciprocate, and the reciprocation of the plurality of cams 60 can slide the massage of the patient's feet, thereby further improving the training effect of the lower limbs.

[0037] In the above embodiment, the second transmission assembly includes a second gear 601 and an adjusting rack 602; one end of each of the plurality of cams 60 is coaxially provided with the second gear 601, the adjusting rack 602 is vertically slidably arranged on one side of the pedal 401, and is engaged with the plurality of second gears 601; a lever 603 is arranged on one side of the adjusting rack 602, a guide plate 604 is arranged at the top of the bed body 10, the guide plate 604 is provided with a wave-shaped guide groove 605, and the lever 603 is slidably arranged in the wave-shaped guide groove 605 along the length direction of the wave-shaped guide groove 605.

[0038] In the above embodiment, the movement of the mounting rod 40 drives the movement of the adjusting rack 602, the movement of the adjusting rack 602 drives the lever 603 to slide along the length direction of the wave-shaped guide groove 605, and drives the adjusting rack 602 to reciprocate up and down, and the reciprocation of the adjusting rack 602 up and down drives the plurality of cams 60 to reciprocate, which is convenient.

[0039] In the above embodiment, a second T-shaped sliding groove is arranged on one side of the pedal 401, a second T-shaped sliding block is arranged on the adjusting rack 602, and the second T-shaped sliding block is slidably arranged in the second T-shaped sliding groove in the vertical direction. The stability of the sliding of the adjusting rack 602 is ensured.

[0040] Please refer to Figure 2 In an embodiment, the opposite sides of the two sets of clamping plates 30 are detachably provided with soft pads 306. The soft pads 306 can improve the comfort of clamping the patient's body. Specifically, the opposite sides of the two sets of clamping plates 30 are provided with T-shaped clamping grooves, and the sides away from the two sets of soft pads 306 are provided with T-shaped clamping blocks, and the T-shaped clamping blocks can be clamped in the T-shaped clamping grooves. The soft pad 306 is clamped and connected with the clamping plate 30, which is convenient to install and disassemble, and is convenient for replacement of the soft pad 306.

[0041] The specific embodiment of the above lower limb rehabilitation training device after heart surgery is: In use, the patient sits on the bed 10 with both feet on the footrest 401, and lies down with their back between the two sets of clamping plates 30 against the backrest 20. At this time, the backrest 20 is pressed downwards and rotates closer to the bed 10, causing the first spring 201 to contract. The rotation of the backrest 20 towards the bed 10 drives the first gear 302 to revolve. The revolve of the first gear 302 meshes with the arc-shaped rack 303, driving the first gear 302 to rotate on its own axis. The rotation of the first gear 302 drives the bidirectional screw 301 to rotate. The rotation of the bidirectional screw 301 engages with the threads of the two sets of clamping plates 30, thus driving the two sets of clamping plates 30 to move closer together. When the patient's body is clamped and fixed relatively close to the movement, the two sets of clamping plates 30 stop moving and the bidirectional screw 301 stops rotating. At this time, the first gear 302 rotates and the ball head pin 304 separates from the ball head groove 3021. The back plate 20 can continue to rotate downward to make the patient lie down, which facilitates automatic adaptation to patients of different body types for clamping and fixing. It is convenient to fix the patient's body in advance by lying down before training to avoid displacement caused by training reaction force, thus ensuring training efficiency. In addition, the back plate 20 can assist the patient to lie down and get up, reduce the physical exertion of the patient to get up on their own, and meet the needs of patients who are physically weak after cardiac surgery.

[0042] During training, the patient pushes the pedal 401 to drive the mounting rod 40 to slide. The sliding of the mounting rod 40 can drive the guide shaft 402 to move and compress the third spring 403 through the connecting block 404 and the connecting frame 4021. At this time, the third spring 403 can generate resistance during the patient's leg extension movement, and during the patient's leg flexion movement, the reaction force of the third spring 403 can drive the mounting rod 40 to slide back to its original position, thus facilitating the patient to repeatedly perform lower limb flexion and extension training.

[0043] Furthermore, during the movement of the mounting rod 40, the movement of the mounting rod 40 drives the adjustment rack 602 to move. The movement of the adjustment rack 602 drives the lever 603 to slide along the length of the wave guide groove 605, and drives the adjustment rack 602 to move up and down reciprocally. The up and down reciprocating movement of the adjustment rack 602 meshes with multiple sets of second gears 601, which drives multiple sets of cams 60 to swing back and forth. The swinging back and forth of the multiple sets of cams 60 can perform a sliding massage on the patient's feet, thereby further improving the lower limb training effect.

[0044] On the other hand, the patient steps on the pedal 501 and turns the pedal 501, the pedal 501 is driven to rotate the adjusting screw 50 through the meshing of the first bevel gear 502 and the second bevel gear 503, the adjusting screw 50 is driven to move the connecting block 404 through the threaded connection, and it can be understood that the downward sliding of the connecting block 404 can increase the number of groups connected with the connecting frame 4021, thereby increasing the resistance during the leg stretching movement, and the upward sliding of the connecting block 404 can reduce the number of groups connected with the connecting frame 4021, thereby reducing the resistance of the leg stretching movement, facilitating the patient to adjust the training resistance according to the training needs of the patient in the lying state, and improving the practicability of the device.

[0045] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A lower limb rehabilitation training device after cardiac surgery, characterized in that, include: Bed frame (10); The back plate (20) is rotatably disposed at the top of the bed body (10) along the wide side axis of the bed body (10), and a first spring (201) for driving the back plate (20) to rotate away from the bed body (10) is connected between the bottom end and the bed body (10). The fixing mechanism includes a clamping plate (30) and a first transmission assembly. Two sets of clamping plates (30) are disposed opposite each other at the top of the back plate (20) and slide along the width direction of the bed body (10). The first transmission assembly connects the bed body (10), the back plate (20) and the two sets of clamping plates (30) and is used to convert the rotation of the back plate (20) toward or away from the bed body (10) into the relative movement of the two sets of clamping plates (30) toward or away from each other. and The training mechanism includes a mounting rod (40), pedals (401), and a resistance assembly. The mounting rod (40) is slidably disposed at the top of the bed (10) along the length direction of the bed (10). Pedals (401) are provided at both ends of the mounting rod (40). The resistance assembly connects the mounting rod (40) and the bed (10) and provides resistance when the mounting rod (40) slides away from the back plate (20).

2. The lower limb rehabilitation training device after cardiac surgery according to claim 1, characterized in that, The first transmission assembly includes a bidirectional screw (301), a first gear (302), and an arc-shaped rack (303); the top of the back plate (20) is provided with a first sliding groove (202), the bottom ends of the two sets of clamping plates (30) are slidably disposed in the first sliding groove (202) along the width direction of the bed (10), the bidirectional screw (301) is rotatably disposed in the first sliding groove (202), and both ends are threadedly connected to the two sets of clamping plates (30) respectively, one end of the bidirectional screw (301) is coaxially disposed with the first gear (302), the arc-shaped rack (303) is disposed on the bed (10) and coaxial with the rotation axis of the back plate (20), and the arc-shaped rack (303) meshes with the first gear (302).

3. The lower limb rehabilitation training device after cardiac surgery according to claim 2, characterized in that, The first gear (302) is rotatably sleeved on one end of the bidirectional screw (301) on the same axis. Multiple sets of mounting holes (3011) are opened on the circumferential side of one end of the bidirectional screw (301). Ball pins (304) are slidably arranged in the multiple sets of mounting holes (3011). A second spring (305) is connected to the bottom surface of the multiple sets of ball pins (304) and the mounting holes (3011). Multiple sets of ball grooves (3021) are opened on the inner side of the first gear (302) along its circumferential direction. The ball heads of the multiple sets of ball pins (304) are respectively locked in the multiple sets of ball grooves (3021).

4. The lower limb rehabilitation training device after cardiac surgery according to claim 1, characterized in that, The resistance assembly includes a guide shaft (402) and a third spring (403); a second slide groove (101) is provided at the top of the bed body (10); the guide shaft (402) is slidably disposed in the second slide groove (101) along the length direction of the bed body (10); a connecting frame (4021) is provided at the end of the guide shaft (402) near the back plate (20); a connecting block (404) is provided on the mounting rod (40); the connecting block (404) passes through the connecting frame (4021); the third spring (403) is sleeved on the guide shaft (402), and its two ends abut against the connecting frame (4021) and one end of the second slide groove (101) respectively.

5. The lower limb rehabilitation training device after cardiac surgery according to claim 4, characterized in that, The training mechanism also includes an adjustment component; multiple sets of resistance components are arranged in a vertical array, and the connecting block (404) is slidably disposed on the mounting rod (40) in a vertical direction. The connecting block (404) can be slidably inserted into the connecting frame (4021) in the multiple sets of adjustment components. The adjustment component connects the mounting rod (40) and the connecting block (404) and is used to drive the connecting block (404) to slide.

6. The lower limb rehabilitation training device after cardiac surgery according to claim 5, characterized in that, The adjustment assembly includes an adjustment screw (50); the top of the mounting rod (40) is vertically provided with a through third slide groove (405), the connecting block (404) is vertically slidably disposed in the third slide groove (405), the adjustment screw (50) is arranged in the vertical direction and is rotatably disposed in the third slide groove (405), and is threadedly connected to the connecting block (404).

7. The lower limb rehabilitation training device after cardiac surgery according to claim 6, characterized in that, The adjustment assembly also includes a pedal (501), a first bevel gear (502), and a second bevel gear (503); the pedal (501) is rotatably mounted on the mounting rod (40), with one end facing the back plate (20), and the first bevel gear (502) is coaxially mounted on the other end of the pedal (501), and the second bevel gear (503) is coaxially mounted on the top end of the adjustment screw (50), and the second bevel gear (503) meshes with the first bevel gear (502).

8. The lower limb rehabilitation training device after cardiac surgery according to claim 1, characterized in that, Both sets of pedals (401) are equipped with massage mechanisms, each including a cam (60) and a second transmission assembly. A mounting groove (4011) is provided on the side of the pedal (401) facing away from the back plate (20). Multiple sets of rotatable cams (60) are arranged in a vertical array within the mounting groove (4011). Multiple through slots (4012) communicating with the mounting groove (4011) are provided on the side of the pedal (401) facing the back plate (20). The through groove (4012) corresponds one-to-one with the multiple sets of cams (60). The second transmission component is disposed on the pedal (401) and connects the bed (10) and the multiple sets of cams (60). It is used to convert the sliding of the mounting rod (40) into the reciprocating swing of the multiple sets of cams (60), so that the periphery of the multiple sets of cams (60) can protrude from the side of the pedal (401) facing the back plate (20) through the through groove (4012) or retract into the mounting groove (4011).

9. A lower limb rehabilitation training device after cardiac surgery according to claim 8, characterized in that, The second transmission assembly includes a second gear (601) and an adjusting rack (602); one end of each of the multiple sets of cams (60) is coaxially provided with the second gear (601), the adjusting rack (602) is vertically slidably disposed on one side of the pedal (401) and meshes with the multiple sets of the second gear (601), a lever (603) is provided on one side of the adjusting rack (602), a guide plate (604) is provided at the top of the bed (10), a wave guide groove (605) is provided on the guide plate (604), and the lever (603) is slidably disposed in the wave guide groove (605) along the length direction of the wave guide groove (605).

10. The lower limb rehabilitation training device after cardiac surgery according to claim 1, characterized in that, Both sets of clamping plates (30) are detachably provided with pads (306) on opposite sides.

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