A functional chair that helps traumatic knee joint recovery

Abstract

The present invention discloses a functional chair that helps traumatic knee joint recovery, which belongs to the technical field of medical devices, including a wheelchair, wherein the side wall of the wheelchair is rotatably connected with a leg board, a motor is fixed to one side of the bottom of the wheelchair, a transmission shaft is fixed to the output shaft of the motor, the transmission shaft is rotatably connected to the bottom of the wheelchair, and a caster is fixed to the end of the transmission shaft, a trigger member that cooperates with the transmission shaft is provided at the bottom of the wheelchair, a mounting plate is fixed to the bottom of the wheelchair, the side wall of the mounting plate is rotatably connected with an inner gear cylinder, and a driving sprocket is fixedly connected to one side of the outer wall of the inner gear cylinder. The functional chair that helps traumatic knee joint recovery, by providing a trigger member and a cam, the user can connect the transmission shaft with the inner gear cylinder through the trigger member, the driven sprocket will drive the cam to rotate through the rotating rod, and then the cam will intermittently push the leg board, and the leg board will drive the patient's calf to rotate, thereby helping the patient's knee joint recovery.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a functional chair that helps traumatic knee joint recovery. Background Art

[0002] During orthopedic treatment, bone healing is only a part of the treatment. Recovery after treatment is also an indispensable medical step, especially after injuries to the knee, when patients need to stay in bed for a long time to recuperate.

[0003] After patients rest in bed for a long time, some fascia connections will be generated between the joints in the knee area. These connections will make it difficult for the joints to bend after being straightened for a long time. Patients need to undergo some knee rehabilitation training to restore joint function. However, these recovery trainings require the assistance of a rehabilitation therapist or doctor. Patients cannot complete the training by themselves, which makes it impossible for patients to receive recovery training anytime and anywhere, which will cause great trouble to patients.

[0004] Therefore, we propose a functional chair that helps traumatic knee joint recovery to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that it is inconvenient for patients with knee joint injuries to receive recovery training, and to propose a functional chair that helps the injured knee joint to recover.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A functional chair that helps traumatic knee joint recovery, comprising a wheelchair, wherein the side wall of the wheelchair is rotatably connected to a leg board, a motor is fixed to one side of the bottom of the wheelchair, a transmission shaft is fixed to the output shaft of the motor, the transmission shaft is rotatably connected to the bottom of the wheelchair, and a caster is fixed to the end of the transmission shaft, a trigger member that cooperates with the transmission shaft is provided at the bottom of the wheelchair, a mounting plate is fixed to the bottom of the wheelchair, the side wall of the mounting plate is rotatably connected to an inner gear cylinder, one side of the outer wall of the inner gear cylinder is fixedly connected to a driving sprocket, the driving sprocket is rotatably connected to a chain, the chain is rotatably connected to a driven sprocket, a side of the mounting plate away from the driving sprocket is rotatably connected to a swivel, a connecting rod is fixed to the side wall of the swivel, a sleeve is fixed to the end of the connecting rod, a rotating rod is rotatably connected to the inside of the sleeve, the driven sprocket is fixedly connected to the surface of the rotating rod, a symmetrically arranged cam is fixedly connected to the end of the rotating rod, a second electric telescopic rod is rotatably connected to the middle part of the connecting rod, and the end of the second electric telescopic rod is rotatably connected to the bottom of the wheelchair.

[0008] By setting a trigger and a cam, the user can connect the transmission shaft and the inner gear cylinder through the trigger, and then the inner gear cylinder will drive the driven sprocket to rotate through the active sprocket and the chain, and then the driven sprocket will drive the cam to rotate through the rotating rod, and then the cam will intermittently push the leg board, and the leg board will drive the patient's calf to rotate, and then the joint between the patient's calf and thigh will rotate, so as to help the patient's knee joint recover.

[0009] Preferably, the height of the leg board is greater than the distance between the bottom wall of the wheelchair and the cam, and the side wall of the cam is in close contact with the side wall of the leg board.

[0010] By setting the height of the leg board to be greater than the distance between the wheelchair and the cam, it is effectively ensured that the rotating cam can always be in contact with the side wall of the leg board.

[0011] Preferably, the pitch circle diameter of the driving sprocket is larger than the pitch circle diameter of the driven sprocket, and the outer diameter of the driven sprocket is smaller than the base circle diameter of the cam.

[0012] By setting the outer diameter of the driven sprocket to be smaller than the base circle diameter of the cam, the driven sprocket can be effectively prevented from contacting the rotating side wall of the leg plate, thereby effectively preventing the leg plate from hindering the rotation of the driven sprocket.

[0013] Preferably, the inner diameter of the rotating ring is larger than the outer diameter of the inner gear cylinder.

[0014] By setting the inner diameter of the rotating ring to be larger than the outer diameter of the inner gear cylinder, the rotating ring can be effectively prevented from hindering the rotation of the inner gear cylinder.

[0015] Preferably, the trigger member includes a key clamped on the surface of the transmission shaft, a slide cylinder slidably connected to the transmission shaft via the key, and an outer gear cylinder fixedly mounted on the outer surface of the slide cylinder and cooperating with the inner gear cylinder, a clamping ring located on one side of the outer gear cylinder is fixed to the outer surface of the slide cylinder, a clamping block is clamped on the clamping ring, a first electric telescopic rod is fixed on the top of the clamping block, and the first electric telescopic rod is fixedly mounted on the bottom of the wheelchair.

[0016] By setting a trigger, the user can drive the retaining ring to move axially through the first electric telescopic rod and the clamping block, and then the retaining ring will drive the outer gear cylinder to insert into the inner gear cylinder, and then the transmission shaft can drive the outer gear cylinder to rotate through the clamping key, and then the outer gear cylinder will drive the driving sprocket to rotate through the inner gear cylinder, and the driving sprocket will drive the cam to rotate.

[0017] Preferably, a slide groove cooperating with the key is provided on the inner wall of the slide cylinder, the width of the slide groove is consistent with the width of the key, and the length of the slide groove is greater than the length of the key.

[0018] By providing a latching key, the latching key can latch the outer gear cylinder onto the surface of the transmission shaft, and also facilitates the outer gear cylinder to slide on the surface of the transmission shaft.

[0019] Preferably, the cross section of the clamping ring is T-shaped, and the inner wall of the clamping block is provided with a T-shaped groove that cooperates with the clamping ring.

[0020] By setting the cross section of the clamping ring in a T-shape, the rotation between the clamping ring and the clamping block can be effectively restricted, so that the clamping ring can move together with the clamping block in real time.

[0021] Preferably, the lift of the first electric telescopic rod is greater than the distance between the outer gear cylinder and the inner gear cylinder.

[0022] By setting the lift of the first electric telescopic rod to be greater than the distance between the inner gear cylinder and the outer gear cylinder, the first electric telescopic rod can drive the outer gear cylinder to insert into the inner gear cylinder for a longer distance, thereby effectively preventing unstable meshing between the inner gear cylinder and the outer gear cylinder.

[0023] Preferably, a strap is fixedly connected to the top of the wheelchair, and a connector is fixedly connected to the strap.

[0024] By providing straps and connectors, the user can fix the patient's thighs on the wheelchair through the straps and connectors, effectively preventing the leg board from rotating with the calf and thigh when rotating, thereby preventing the patient's knees from rotating.

[0025] To sum up, the technical effects and advantages of the present invention are as follows: the functional chair that helps traumatic knee joint recovery, by setting a trigger member and a cam, the user can connect the transmission shaft and the inner gear cylinder together through the trigger member, and then the inner gear cylinder will drive the driven sprocket to rotate through the active sprocket and the chain, and then the driven sprocket will drive the cam to rotate through the rotating rod, and then the cam will intermittently push the leg board, the leg board will drive the patient's calf to rotate, and then the joint between the patient's calf and thigh will rotate, thereby helping the patient's knee joint recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0028] Figure 3 For the present invention Figure 2 Enlarged view of part A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of the trigger member of the present invention;

[0030] Figure 5 It is a cross-sectional view of the mounting plate of the present invention.

[0031] In the figure: 1. wheelchair; 2. leg board; 3. motor; 4. transmission shaft; 5. caster;

[0032] 6. trigger member; 61. key; 62. slide cylinder; 63. outer gear cylinder; 64. snap ring; 65. block; 66. first electric telescopic rod;

[0033] 7. Mounting plate; 8. Internal gear cylinder; 9. Driving sprocket; 10. Chain; 11. Driven sprocket; 12. Swivel; 13. Connecting rod; 14. Sleeve; 15. Rotating rod; 16. Cam; 17. Second electric telescopic rod; 18. Tie; 19. Connecting head. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-3 A functional chair that helps traumatic knee joint recovery includes a wheelchair 1, a leg board 2 is rotatably connected to the side wall of the wheelchair 1, the leg board 2 is used to place the patient's calf, a motor 3 is fixed to one side of the bottom of the wheelchair 1, a transmission shaft 4 is fixed to the output shaft of the motor 3, the transmission shaft 4 is rotatably connected to the bottom of the wheelchair 1, and a caster 5 is fixed to the end of the transmission shaft 4, the motor 3 can drive the caster 5 to rotate through the transmission shaft 4, and then the wheelchair 1 will drive the patient to move.

[0036] A trigger member 6 cooperating with the transmission shaft 4 is arranged at the bottom of the wheelchair 1, a mounting plate 7 is fixed at the bottom of the wheelchair 1, and an inner gear cylinder 8 is rotatably connected to the side wall of the mounting plate 7. The trigger member 6 can transmit the power of the transmission shaft 4 to the inner gear cylinder 8, and a driving sprocket 9 is fixedly connected to one side of the outer wall of the inner gear cylinder 8, and the driving sprocket 9 is rotatably connected to a chain 10, and the chain 10 is rotatably connected to a driven sprocket 11, and the rotating inner gear cylinder 8 drives the driven sprocket 11 to rotate through the driving sprocket 9 and the chain 10; a swivel 12 is rotatably connected to the side of the mounting plate 7 away from the driving sprocket 9, and the side wall of the swivel 12 is fixedly connected to the driving sprocket 9. A connecting rod 13 is provided, a sleeve 14 is fixed at the end of the connecting rod 13, a rotating rod 15 is rotatably connected inside the sleeve 14, a driven sprocket 11 is fixedly connected to the surface of the rotating rod 15, the rotating driven sprocket 11 can drive the rotating rod 15 to rotate, a symmetrically arranged cam 16 is fixedly connected to the end of the rotating rod 15, the rotating rotating rod 15 can drive the cam 16 to rotate, and then the cam 16 will intermittently push the leg board 2, and then the leg board 2 will reciprocate, at this time the patient's calf will rotate together with the leg board 2, thereby driving the patient's knee joint to rotate.

[0037] The middle part of the connecting rod 13 is rotatably connected to the second electric telescopic rod 17, and the end of the second electric telescopic rod 17 is rotatably connected to the bottom of the wheelchair 1. The user can control the length of the second electric telescopic rod 17 to control the rotation angle of the connecting rod 13, and then the connecting rod 13 can drive the rotating rod 15 and the cam 16 to rotate after rotation, and then the fitting position between the cam 16 and the leg board 2 will change, and then the rotation angle of the leg board 2 will change, so that the patient can adjust the rotation amplitude of the leg board 2 according to the actual recovery situation.

[0038] The height of the leg board 2 is greater than the distance between the bottom wall of the wheelchair 1 and the cam 16 , and the side wall of the cam 16 is in close contact with the side wall of the leg board 2 , thereby effectively ensuring that the rotating cam 16 can always fit closely with the side wall of the leg board 2 .

[0039] The pitch circle diameter of the driving sprocket 9 is larger than the pitch circle diameter of the driven sprocket 11, thereby increasing the rotation speed of the driven sprocket 11, making it easier for the driven sprocket 11 to drive the cam 16 to rotate faster, thereby accelerating the rotation rate of the leg plate 2, and increasing the frequency of rotation of the knee joint driven by the leg plate 2; and the outer diameter of the driven sprocket 11 is smaller than the base circle diameter of the cam 16, thereby effectively avoiding collision between the driven sprocket 11 and the leg plate 2, resulting in the cam 16 and the leg plate 2 being unable to contact each other.

[0040] Reference Figure 2-4 The trigger member 6 includes a key 61 clamped on the surface of the transmission shaft 4, a slide cylinder 62 slidably connected to the transmission shaft 4 through the key 61, and an outer gear cylinder 63 fixedly installed on the outer surface of the slide cylinder 62 and cooperating with the inner gear cylinder 8. The outer side of the outer gear cylinder 63 and the inner side of the inner gear cylinder 8 are both provided with clamping teeth, and the outer gear cylinder 63 can be clamped into the inner side of the inner gear cylinder 8; a clamping ring 64 located on one side of the outer gear cylinder 63 is fixed on the outer surface of the slide cylinder 62, and a clamping block 65 is clamped on the clamping ring 64. A first electric telescopic rod 66 is fixed on the top of the clamping block 65. The first electric telescopic rod 66 is fixedly installed on the bottom of the wheelchair 1. When the first electric telescopic rod 66 is extended and retracted, it can drive the clamping block 65 to slide, and then the clamping block 65 will drive the slide cylinder 62 to slide on the transmission shaft 4 through the clamping ring 64, and then the slide cylinder 62 will drive the outer gear cylinder 63 to insert into the inner gear cylinder 8.

[0041] A sliding groove cooperating with the card key 61 is opened on the inner wall of the slide cylinder 62. The width of the sliding groove is consistent with the width of the card key 61, and the length of the sliding groove is greater than the length of the card key 61. The slide cylinder 62 can slide along the card key 61 on the outside of the transmission shaft 4. At the same time, the transmission shaft 4 can also drive the slide cylinder 62 to rotate through the card key 61.

[0042] The cross section of the snap ring 64 is T-shaped, and the inner wall of the clamping block 65 is provided with a T-slot that cooperates with the snap ring 64. The inner wall of the T-slot of the clamping block 65 is in close contact with the outer wall of the snap ring 64, so that the snap ring 64 can move with the clamping block 65 in real time.

[0043] The lift of the first electric telescopic rod 66 is greater than the distance between the outer gear cylinder 63 and the inner gear cylinder 8, which effectively ensures that the first electric telescopic rod 66 can drive the slide cylinder 62 to slide a sufficient distance, so as to drive the outer gear cylinder 63 to insert into the inner gear cylinder 8 a sufficient distance, effectively ensuring that the outer gear cylinder 63 and the inner gear cylinder 8 are tightly meshed.

[0044] Reference Figure 1 The top of the wheelchair 1 is fixedly connected with a strap 18, and a connector 19 is fixedly connected to the strap 18, so that the patient can fix his thigh on the surface of the wheelchair 1 through the strap 18 and the connector 19, effectively preventing the patient's thigh from rotating together with the calf, causing the knee joint to be unable to rotate.

[0045] Reference Figure 5 The inner diameter of the rotating ring 12 is larger than the outer diameter of the inner gear cylinder 8 , which effectively prevents the outer gear cylinder 63 from conflicting with the rotating ring 12 after sliding out of the inner gear cylinder 8 .

[0046] Working principle: when the user sits on the wheelchair 1, the patient's thigh can be tied by the strap 18 and the connector 19, and the motor 3 can be controlled to drive the transmission shaft 4 to rotate, and then the transmission shaft 4 will drive the caster 5 to rotate, and then the caster 5 will drive the wheelchair 1 and the patient to move. When the patient needs to perform knee joint recovery training, the user can control the first electric telescopic rod 66 to retract, and the first electric telescopic rod 66 will drive the slide 62 to slide through the block 65 and the snap ring 64, and then the slide 62 will slide along the key 61. At this time, the outer gear cylinder 63 slides into the inner gear cylinder 8 together with the slide 62. At this time, the transmission shaft 4 will drive the outer gear cylinder 63 through the key 61 and the slide 62. When the cylinder 63 rotates, the outer gear cylinder 63 will drive the active sprocket 9 to rotate through the inner gear cylinder 8, and the active sprocket 9 will drive the rotating rod 15 to rotate through the chain 10 and the driven sprocket 11, and the rotating rod 15 will drive the cam 16 to rotate, and the cam 16 will drive the leg board 2 to rotate intermittently, and the leg board 2 will drive the patient's calf to rotate, and the rotation between the patient's calf and thigh will help the patient's knee joint recovery; at the same time, the user can control the second electric telescopic rod 17 to drive the connecting rod 13 to rotate, so as to change the position of the contact point between the cam 16 and the leg board 2, so as to change the distance between the rotating rod 15 and the leg board 2 to change the rotation angle of the leg board 2, so as to adapt to different knee joint recovery treatment courses.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A functional chair that helps traumatic knee joint recovery, comprising a wheelchair (1), characterized in that: The side wall of the wheelchair (1) is rotatably connected to a leg board (2); a motor (3) is fixed to one side of the bottom of the wheelchair (1); a transmission shaft (4) is fixed to the output shaft of the motor (3); the transmission shaft (4) is rotatably connected to the bottom of the wheelchair (1); and a caster (5) is fixed to the end of the transmission shaft (4); a trigger member (6) cooperating with the transmission shaft (4) is provided at the bottom of the wheelchair (1); a mounting plate (7) is fixed to the bottom of the wheelchair (1); a side wall of the mounting plate (7) is rotatably connected to an internal gear cylinder (8); a driving sprocket (9) is fixedly connected to one side of the outer wall of the internal gear cylinder (8); the driving sprocket (9) is rotatably connected to a chain (10); and the chain (10) is rotatably connected to a driven sprocket (11), a side of the mounting plate (7) away from the driving sprocket (9) is rotatably connected to a swivel (12), a connecting rod (13) is fixed to the side wall of the swivel (12), a sleeve (14) is fixed to the end of the connecting rod (13), a rotating rod (15) is rotatably connected inside the sleeve (14), the driven sprocket (11) is fixedly connected to the surface of the rotating rod (15), the end of the rotating rod (15) is fixedly connected to a symmetrically arranged cam (16), the middle part of the connecting rod (13) is rotatably connected to a second electric telescopic rod (17), and the end of the second electric telescopic rod (17) is rotatably connected to the bottom of the wheelchair (1); The trigger member (6) comprises a key (61) clamped on the surface of the transmission shaft (4), a slide cylinder (62) slidably connected to the transmission shaft (4) via the key (61), and an outer gear cylinder (63) fixedly mounted on the outer surface of the slide cylinder (62) and cooperating with the inner gear cylinder (8); a clamping ring (64) located on one side of the outer gear cylinder (63) is fixed on the outer surface of the slide cylinder (62); a clamping block (65) is clamped on the clamping ring (64); a first electric telescopic rod (66) is fixed on the top of the clamping block (65); and the first electric telescopic rod (66) is fixedly mounted on the bottom of the wheelchair (1).

2. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The height of the leg board (2) is greater than the distance between the bottom wall of the wheelchair (1) and the cam (16), and the side wall of the cam (16) is in close contact with the side wall of the leg board (2).

3. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The pitch circle diameter of the driving sprocket (9) is larger than the pitch circle diameter of the driven sprocket (11), and the outer diameter of the driven sprocket (11) is smaller than the base circle diameter of the cam (16).

4. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The inner diameter of the rotating ring (12) is greater than the outer diameter of the inner gear cylinder (8).

5. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The inner wall of the slide cylinder (62) is provided with a slide groove matched with the latch key (61), the width of the slide groove is consistent with the width of the latch key (61), and the length of the slide groove is greater than the length of the latch key (61).

6. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The cross section of the clamping ring (64) is T-shaped, and the inner wall of the clamping block (65) is provided with a T-shaped groove that matches the clamping ring (64).

7. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The lift of the first electric telescopic rod (66) is greater than the distance between the outer gear cylinder (63) and the inner gear cylinder (8).

8. The functional chair for assisting the recovery of traumatic knee joints according to claim 1, characterized in that: The top of the wheelchair (1) is fixedly connected with a strap (18), and a connector (19) is fixedly connected to the strap (18).

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