Knee joint straightening auxiliary exerciser

Abstract

The invention provides a knee joint straightening auxiliary exerciser which comprises a thigh frame, a connecting base arranged on the thigh frame in a sliding mode, a shank frame hinged to the end of the thigh frame, a sliding block arranged on the shank frame in a sliding mode, a resistance mechanism arranged on the shank frame and connected with the sliding block and applying resistance to sliding of the sliding block through the resistance mechanism and further comprises a driving rope. The two ends of the driving rope are connected with the sliding block and the connecting base respectively, an adjusting mechanism connected with the thigh frame and the driving rope is arranged on the connecting base, and the position of the sliding connecting base is locked through the adjusting mechanism, and the tensioning length of the driving rope is adjusted through the adjusting mechanism. According to the exercise device, the exercise strength can be quickly adjusted, elastic components with different elasticity coefficients do not need to be replaced when the exercise strength is adjusted, the adjusting process is convenient and quick, a patient can adjust the exercise strength by himself / herself conveniently, meanwhile, the exercise device can be used by the patient at home conveniently, and the practical value of the exercise device is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a knee joint extension assisting exerciser. BACKGROUND

[0002] As one of the most complex and frequently used joints in the human body, the knee joint is prone to damage due to various reasons such as trauma, disease, and postoperative recovery, etc., which often leads to limited activity function of the knee joint, especially the straightening dysfunction. Restoring the normal straightening function of the knee joint is of great significance to the recovery of the patient's daily activity ability and the improvement of the quality of life. Therefore, special exercise equipment is needed to exercise the straightening function of the knee joint.

[0003] For example, a bedridden patient leg care and exercise device is provided in Chinese patent CN113663277B, which effectively solves the problem of poor exercise effect of existing exercise devices, allowing the patient to perform passive knee bending training and active leg straightening training, combining the advantages of passive and active training, improving the exercise effect, promoting blood flow in the patient's legs, preventing varicose veins, and promoting early recovery of the patient.

[0004] However, the existing knee joint extension assisting device is mostly replaced by elastic members with different elastic coefficients when adjusting the exercise intensity, and the traditional adjustment method is relatively complex and cumbersome, which is not convenient for patients to adjust themselves, resulting in a decline in practicality. Therefore, a knee joint extension assisting exerciser is proposed to solve the above problems and improve the practical value of the exercise equipment. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a knee joint extension assisting exerciser to solve the technical problems of the existing knee joint extension assisting device in the prior art, which is mostly replaced by elastic members with different elastic coefficients when adjusting the exercise intensity, and the traditional adjustment method is relatively complex and cumbersome, which is not convenient for patients to adjust themselves, resulting in a decline in practicality.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme, a knee joint extension assisting exerciser, comprising: A thigh bracket, a connecting seat is slidably arranged on the thigh bracket; A calf bracket is hingedly connected to the end of the thigh bracket, and a sliding block is slidably arranged on the calf bracket; A resistance mechanism is arranged on the calf bracket and connected with the sliding block to exert resistance on the sliding of the sliding block; A driving rope is connected with the sliding block and the connecting seat at both ends; and An adjusting mechanism is arranged on the connecting seat and connected with the thigh support and the driving rope to lock the position of the connecting seat after sliding and adjust the tension length of the driving rope.

[0007] Further, a pedal is hingedly arranged on the calf support away from the thigh support, and fixing belts are arranged on the thigh support, the calf support and the pedal.

[0008] Further, a pressing rod is hingedly arranged on the thigh support, and a stopper is arranged on the thigh support at the hinged position with the calf support, and the stopper is in abutment with the calf support when the thigh support is flush with the calf support.

[0009] Further, the resistance mechanism comprises: a pulley rotatably arranged on the calf support along an axis thereof; a tension spring fixedly connected with the calf support at one end; and a connecting rope connected with the tension spring at one end and connected with the sliding block after being wound around the pulley at the other end.

[0010] Further, a first sliding groove is arranged on the thigh support, and a second sliding groove is arranged on the calf support, and the connecting seat and the sliding block are respectively slidably arranged in the first sliding groove and the second sliding groove.

[0011] Further, the adjusting mechanism comprises: a winding wheel provided with a mounting shaft rotatably arranged on the connecting seat along an axis thereof, and one end of the driving rope is wound around the winding wheel; a driving column, the mounting shaft is a hollow structure, and the driving column is slidably arranged in the mounting shaft along an axis thereof; a locking assembly arranged on the driving column and connected with the winding wheel, the connecting seat and the thigh support to convert the sliding of the driving column into locking of the position of the winding wheel on the connecting seat and the position of the connecting seat on the thigh support; and a tensioning assembly arranged on the winding wheel and connected with the connecting seat to tension the driving rope.

[0012] Further, the locking assembly comprises: a locking plate slidably arranged on the connecting seat, the connecting seat is provided with a shielding groove, the locking plate is provided with a mounting plate, the mounting plate is provided with a clamping block, the mounting plate is slidably arranged in the shielding groove, and the clamping block can be retracted into the shielding groove after the mounting plate slides, and one side of the locking plate is provided with a ratchet block. An elastic member is arranged between the driving column and the inner wall of the mounting shaft, the driving column is provided with a clamping plate, the inner side of the locking plate is provided with an annular groove, and the clamping plate is arranged in the clamping groove of the mounting shaft and clamped into the annular groove; A rack is arranged in the inner side of the first sliding groove, and the clamping block can be clamped on the rack; and A ratchet disc is arranged on the mounting shaft, and the ratchet block can be engaged with the ratchet disc.

[0013] Further, the tensioning assembly comprises: A mounting wheel is arranged on the mounting shaft; and A constant force spring is arranged in the mounting wheel, one end of the constant force spring is fixedly connected with the mounting wheel, a guide cylinder is arranged on the connecting seat, and the other end of the constant force spring is fixedly connected with the guide cylinder.

[0014] Further, the driving column is further provided with a rotatable driving part.

[0015] Further, a rotatable connecting block is arranged on the sliding block, and the end of the driving rope is fixedly connected with the connecting block.

[0016] Compared with the prior art, the present application has the following advantages: The exerciser is used to fix the thigh support and the calf support on the thigh and the calf of the patient respectively, the patient can perform the stretching exercise to assist the straightening of the knee joint, the connecting seat is fixed on the thigh support under the action of the adjusting mechanism in the initial state, the sliding block is moved on the calf support by the driving rope in the process of leg movement, and the sliding of the sliding block is resisted by the resistance mechanism to improve the exercise effect. The position of the connecting seat on the thigh support can be adjusted and fixed by the adjusting mechanism, the tension length of the driving rope is adjusted at the same time, the position change of the connecting seat is adapted, the sliding distance of the sliding block on the calf support is changed every time the leg is stretched, the stretching length of the resistance mechanism is changed, the exercise intensity is quickly adjusted, different elastic members with different elastic coefficients do not need to be replaced when the exercise intensity is adjusted, the adjusting process is convenient and fast, the patient can adjust it by himself, the patient can use it at home, and the practical value of the exerciser is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application, the drawings needed 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.

[0018] Figure 1A three-dimensional structural schematic view of a knee joint straightening auxiliary exerciser provided by the present application; Figure 2 A side view of the knee joint straightening auxiliary exerciser of the present application; Figure 3 A three-dimensional structural schematic view of a connecting seat of the knee joint straightening auxiliary exerciser of the present application; Figure 4 A sectional view of the connecting seat of the knee joint straightening auxiliary exerciser of the present application; Figure 5 A structural schematic view of the connecting seat of the knee joint straightening auxiliary exerciser of the present application after being disassembled; Figure 6 A structural schematic view of a locking plate of the knee joint straightening auxiliary exerciser of the present application; Reference signs: 1, thigh frame; 2, first sliding groove; 3, stop bar; 4, pressing rod; 5, calf frame; 6, second sliding groove; 7, fixing belt; 8, pedal; 9, connecting column; 10, connecting seat; 11, shielding groove; 12, guide cylinder; 13, mounting shaft; 14, clamping groove; 15, mounting wheel; 16, constant force spring; 17, ratchet disc; 18, winding wheel; 19, driving column; 20, clamping plate; 21, driving part; 22, elastic member; 23, locking plate; 24, ratchet block; 25, annular groove; 26, mounting plate; 27, clamping block; 28, rack; 29, sliding block; 30, connecting block; 31, pulley; 32, connecting rope; 33, tension spring; 34, driving rope. DETAILED DESCRIPTION

[0019] It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application, and the person skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0020] Embodiment: As shown in Figure 1 , 2 , the present application provides a knee joint straightening auxiliary exerciser, which comprises a thigh frame 1, the end of the thigh frame 1 is hingedly connected with a calf frame 5, the end of the calf frame 5 away from the thigh frame 1 is hingedly connected with a pedal 8, the thigh frame 1, the calf frame 5 and the pedal 8 are all provided with a fixing belt 7, the pedal 8 is provided with a connecting column 9, the connecting column 9 is slidably and rotatably arranged at the end of the calf frame 5 along the axis thereof, the thigh frame 1 is hingedly connected with a pressing rod 4, the thigh frame 1 is provided with a stop bar 3 at the hinged connection with the calf frame 5, and the stop bar 3 abuts against the calf frame 5 when the thigh frame 1 is flush with the calf frame 5.

[0021] In use, the thigh support 1 and calf support 5 are secured to the thigh and calf respectively via the fixing straps 7, with the foot placed on the pedal 8 for easy force application. The pedal 8 can slide along the connecting column 9 at the end of the calf support 5 to adapt to the position of the foot, thus completing the wearing of the exercise device. After wearing, active and passive exercises can be selected. During passive exercises, the patient's leg is straightened by pressing down on the pressure bar 4, which is suitable for patients with severely weakened knee joint muscles or severe joint adhesions, improving the patient's rehabilitation efficiency. During active exercises, the patient can hold onto the pressure bar 4 to limit the range of motion of the knee, thereby correcting the straightening posture.

[0022] like Figure 1 , 2 As shown, in this embodiment, the thigh support 1 has a first sliding groove 2, and the lower leg support 5 has a second sliding groove 6. A connecting seat 10 is slidably engaged in the first sliding groove 2, and a slider 29 is slidably engaged in the second sliding groove 6. A resistance mechanism connected to the slider 29 is provided on the lower leg support 5. The resistance mechanism applies resistance to the sliding of the slider 29. The two ends of the drive rope 34 are respectively connected to the slider 29 and the connecting seat 10. The resistance mechanism includes a tension spring 33 and a pulley 31 rotatably mounted on the lower leg support 5. One end of the tension spring 33 is fixedly connected to the lower leg support 5, and one end of the connecting rope 32 is connected to the tension spring 33. The other end passes around the pulley 31 and is connected to the slider 29.

[0023] In the initial state, the position of the connecting seat 10 is fixed and the length of the drive rope 34 is constant. After the device is worn, the patient can perform active exercises. During the exercise, the leg extends, causing the thigh frame 1 and the lower leg frame 5 to rotate along their hinge point. During the relative movement of the thigh frame 1 and the lower leg frame 5, the drive rope 34 pulls the slider 29 to slide in the second groove 6. During the sliding process, the drive rope 34 pulls the tension spring 33 through the connecting rope 32. The tension spring 33 generates resistance to the movement of the slider 29, thereby applying resistance to the patient's leg extension movement and exercising the patient's knee joint extension.

[0024] like Figures 2 to 6As shown, in this embodiment, the connecting seat 10 is provided with an adjusting mechanism connected with the thigh support 1 and the driving rope 34, the position of the connecting seat 10 after sliding is locked and the tension length of the driving rope 34 is adjusted through the adjusting mechanism. The adjusting mechanism comprises a winding wheel 18, the winding wheel 18 is provided with a mounting shaft 13, the mounting shaft 13 is rotatably arranged on the connecting seat 10 along the axis, one end of the driving rope 34 is wound on the winding wheel 18, the mounting shaft 13 is a hollow structure, a driving column 19 is slidably arranged in the mounting shaft 13 along the axis, the winding wheel 18 is provided with a tension assembly connected with the connecting seat 10, the driving rope 34 is tensioned through the tension assembly. The tension assembly comprises a mounting wheel 15 arranged on the mounting shaft 13, a constant force spring 16 is arranged in the mounting wheel 15, one end of the constant force spring 16 is fixedly connected with the mounting wheel 15, a guide cylinder 12 is arranged on the connecting seat 10, the other end of the constant force spring 16 is fixedly connected with the guide cylinder 12.

[0025] When the position of the connecting seat 10 and the winding wheel 18 is released, the connecting seat 10 can slide in the first sliding groove 2, and the driving rope 34 can be stretched in the sliding process, and the winding wheel 18 is driven to rotate, the winding wheel 18 drives the constant force spring 16 to deform in the rotating process, and the winding wheel 18 tensions the driving rope 34 under the action of the constant force spring 16, so as to ensure that the driving rope 34 always maintains a tensioned state during the position adjustment of the connecting seat 10. During passive exercise, the position of the winding wheel 18 can be fixed by manually pulling the driving rope 34, so that the driving rope 34 is in a relaxed state, and the passive exercise is more labor-saving.

[0026] As shown, Figures 2 to 6 As shown, in this embodiment, the driving column 19 is provided with a locking assembly connected with the winding wheel 18, the connecting seat 10 and the thigh support 1, the sliding of the driving column 19 is converted into locking the position of the winding wheel 18 on the connecting seat 10 and the position of the connecting seat 10 on the thigh support 1 through the locking assembly. The locking assembly comprises a locking plate 23 slidably arranged on the connecting seat 10, the connecting seat 10 is provided with a shielding groove 11, the locking plate 23 is provided with a mounting plate 26, the mounting plate 26 is provided with a clamping block 27, the mounting plate 26 is slidably clamped in the shielding groove 11, and the clamping block 27 can be retracted into the shielding groove 11 after the mounting plate 26 slides, one side of the locking plate 23 is provided with a ratchet block 24, the driving column 19 and the inner wall of the mounting shaft 13 are provided with an elastic member 22, the driving column 19 is provided with a clamping plate 20, the inner side of the locking plate 23 is provided with an annular groove 25, the clamping plate 20 penetrates the clamping groove 14 and is clamped into the annular groove 25, the inner side of the first sliding groove 2 is provided with a rack 28, the clamping block 27 can be clamped on the rack 28, the mounting shaft 13 is provided with a ratchet disc 17, the ratchet block 24 can be engaged with the ratchet disc 17.

[0027] In the initial state, the elastic member 22 makes the locking plate 23 in the jacking state, and then the position of the winding wheel 18 is locked through the cooperation of the ratchet block 24 and the ratchet disc 17, so as to limit the length of the driving rope 34. Meanwhile, the position of the connecting seat 10 on the thigh support 1 is fixed through the cooperation of the clamping block 27 and the rack 28. When the position of the connecting seat 10 needs to be adjusted, the elastic member 22 can be compressed by pressing the driving column 19 downward. In the movement process, the driving column 19 pushes the locking plate 23 to slide through the cooperation of the clamping plate 20 and the annular groove 25 on the locking plate 23, so that the ratchet block 24 is separated from the ratchet disc 17, and the fixing of the winding wheel 18 is released, and the winding wheel 18 can rotate to adapt to the length change of the driving rope 34. At the same time, the clamping plate 20 can rotate in the annular groove 25 to adapt to the rotation of the driving column 19. In the movement process, the locking plate 23 can also drive the clamping block 27 to separate from the rack 28 and retract into the shielding groove 11, so that the position fixing of the connecting seat 10 is released. Finally, the position of the connecting seat 10 can be adjusted by rotating the driving column 19, and after adjustment, the driving column 19 is released, and the position fixing of the connecting seat 10 can be quickly completed again, so that the exercise intensity can be quickly adjusted without replacing any parts.

[0028] As shown in Figure 2 In the embodiment, the driving column 19 is also provided with a rotatable driving part 21, which makes the adjustment of the driving column 19 more convenient and avoids the situation that the driving column 19 cannot be rotated due to being held by hand. The sliding block 29 is provided with a rotatable connecting block 30, and the end of the driving rope 34 is fixedly connected with the connecting block 30, so as to conveniently adapt to the angle of the driving rope 34 and improve the stability of the structure of the device.

[0029] The specific use mode and beneficial effects of the present application are as follows: The exerciser is used for fixing the thigh frame 1 and the calf frame 5 on the thigh and the calf of the patient respectively, and the patient can do the stretching exercise to assist the knee joint extension, in the initial state, the connecting seat 10 is fixed on the thigh frame 1 under the action of the adjusting mechanism, in the process of the leg movement, the sliding block 29 is pulled by the driving rope 34 to move on the calf frame 5, and the sliding of the sliding block 29 is resisted by the resistance mechanism to improve the exercise effect. The position of the connecting seat 10 on the thigh frame 1 can be adjusted and fixed by the adjusting mechanism, the length of the driving rope 34 is adjusted when the connecting seat 10 is adjusted to adapt to the position change of the connecting seat 10, when the position of the connecting seat 10 on the thigh frame 1 changes, the sliding distance of the sliding block 29 on the calf frame 5 changes in each stretching exercise, the stretching length of the resistance mechanism changes, and the exercise intensity is quickly adjusted, the elastic members with different elastic coefficients do not need to be replaced when the exercise intensity is adjusted, the adjusting process is convenient and fast, the patient can adjust by himself, and the exerciser is convenient for the patient to use at home, and the practical value of the exerciser is effectively improved.

[0030] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and some modifications or improvements can be made on the basis of the present application, which is obvious for those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of the present application.

Claims

1. A knee extension assist exerciser characterized by comprising: The utility model relates to a kind of leg rehabilitation training device, including: Thigh frame (1), slidingly provided with connecting seat (10) on the thigh frame (1); Shank frame (5) is hinged in the end of the thigh frame (1), slidingly provided with sliding block (29) on the shank frame (5); Resistance mechanism, which is provided on the shank frame (5) and connected with the sliding block (29), is arranged to apply resistance to the sliding of the sliding block (29); Drive rope (34), both ends are connected with the sliding block (29) and the connecting seat (10) respectively;And Adjusting mechanism, which is provided on the connecting seat (10) and connected with the thigh frame (1) and the drive rope (34), is arranged to lock the position of the connecting seat (10) after sliding and adjust the tension length of the drive rope (34).

2. The knee extension assist exercise device of claim 1, wherein: The end of the shank frame (5) away from the thigh frame (1) is hinged with a pedal (8), and the thigh frame (1), the shank frame (5) and the pedal (8) are all provided with a fixing belt (7). The connecting column (9) is arranged on the pedal (8) and is slidably and rotatably arranged on the end of the shank frame (5) along its axis.

3. The knee extension assist exercise device of claim 1, wherein: The thigh frame (1) is hinged with a pressing rod (4), and a stop bar (3) is arranged on the thigh frame (1) at the hinging position with the shank frame (5). When the thigh frame (1) is flush with the shank frame (5), the stop bar (3) abuts against the shank frame (5).

4. The knee extension assist exercise device of claim 1, wherein: The resistance mechanism includes: A pulley (31) is rotatably arranged on the shank frame (5) along its axis; A tension spring (33) is fixedly connected with the shank frame (5) at one end;And A connecting rope (32) is connected with the tension spring (33) at one end and with the sliding block (29) at the other end after passing through the pulley (31).

5. The knee extension assist exercise device of claim 1, wherein: A first sliding groove (2) is formed in the thigh frame (1), and a second sliding groove (6) is formed in the shank frame (5). The connecting seat (10) and the sliding block (29) are respectively slidably arranged in the first sliding groove (2) and the second sliding groove (6).

6. The knee extension assist exercise device of claim 5, wherein: The adjusting mechanism includes: A winding wheel (18) is provided with a mounting shaft (13), the mounting shaft (13) is rotatably arranged on the connecting seat (10) along its axis, and one end of the drive rope (34) is wound around the winding wheel (18); The mounting shaft (13) is a hollow structure, and the drive column (19) is slidably arranged in the mounting shaft (13) along its axis; A locking assembly is arranged on the drive column (19) and connected with the winding wheel (18), the connecting seat (10) and the thigh frame (1), so as to convert the sliding of the drive column (19) into locking the position of the winding wheel (18) on the connecting seat (10) and the position of the connecting seat (10) on the thigh frame (1);And A tensioning assembly is arranged on the winding wheel (18) and connected with the connecting seat (10) to tension the drive rope (34).

7. The knee extension assist exercise device of claim 6, wherein: The locking assembly includes: The locking plate (23) is slidably arranged on the connecting seat (10), the connecting seat (10) is provided with a shielding groove (11), the locking plate (23) is provided with a mounting plate (26), the mounting plate (26) is provided with a clamping block (27), the mounting plate (26) is slidably arranged in the shielding groove (11), and the clamping block (27) can be retracted into the shielding groove (11) after the mounting plate (26) is slid, and one side of the locking plate (23) is provided with a ratchet block (24); The elastic member (22) is arranged between the driving column (19) and the inner wall of the mounting shaft (13), the driving column (19) is provided with a clamping plate (20), the inner side of the locking plate (23) is provided with an annular groove (25), the clamping plate (20) is arranged in the clamping groove (14) on the mounting shaft (13) and clamped into the annular groove (25); The rack (28) is arranged on the inner side of the first sliding groove (2), and the clamping block (27) can be clamped on the rack (28); and The ratchet disc (17) is arranged on the mounting shaft (13), and the ratchet block (24) can be engaged with the ratchet disc (17).

8. The knee extension assist exercise device of claim 6, wherein: The tensioning assembly comprises: The mounting wheel (15) is arranged on the mounting shaft (13); and The constant force spring (16) is arranged in the mounting wheel (15), one end of the constant force spring (16) is fixedly connected with the mounting wheel (15), the connecting seat (10) is provided with a guide cylinder (12), and the other end of the constant force spring (16) is fixedly connected with the guide cylinder (12).

9. The knee extension assist exercise device of claim 6, wherein: The driving part (21) is rotatably arranged on the driving column (19).

10. The knee extension assist exercise device of claim 1, wherein: The connecting block (30) is rotatably arranged on the sliding block (29), and the end of the driving rope (34) is fixedly connected with the connecting block (30).

Images