Limb recovery training device for neurology department

Abstract

The invention relates to the technical field of medical instruments, in particular to a neurology limb recovery training device which comprises a training chair, armrests, a first telescopic rod, a fixing seat, a sliding block and the like. Armrests are connected to the left side and the right side of the training chair, self-locking first telescopic rods are connected to the armrests, fixing seats are connected to the upper sides of the left portion and the right portion of a chair back of the training chair, first sliding grooves are formed in the fixing seats, and sliding blocks are slidably connected to the interiors of the first sliding grooves. The rehabilitation training device is provided with the fixing base, the sliding block, the locking assembly, the first hinge piece and the supporting plate, training is conducted on the abduction angle and the adduction angle of the upper arm of a patient, recovery of the range of motion of shoulder joints, prevention of joint stiffness and muscle atrophy and promotion of upper limb motion function reconstruction are facilitated, the hand strength of the patient can be subjected to recovery training through the holding rod, and the rehabilitation training effect is good. The hand grasping ability is improved, fine action control is improved, hand muscle strength is enhanced, hand muscle strength degeneration is prevented, and the self-care ability of a patient is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and particularly relates to a limb recovery training device for neurology. BACKGROUND

[0002] Limb movement disorders and paralysis caused by diseases of neurology are mainly caused by damage to the central or peripheral nervous system. Common causes include cerebral apoplexy (cerebral infarction, cerebral hemorrhage), spinal cord injury, Parkinson's disease, multiple sclerosis, myasthenia gravis and peripheral neuropathy, etc. These diseases can destroy the brain, spinal cord or nerve pathways, causing interruption of muscle control signal transmission, causing single limb, hemiplegia or quadriplegia, often accompanied by muscle strength decline, abnormal muscle tone, sensory disturbance, etc. Patients may have difficulty walking, limb stiffness, balance disorders or even complete loss of activity, which seriously affects the quality of life.

[0003] The patent with the patent publication number CN211095765U discloses a limb function recovery device for hemiplegic patients, which comprises a seat, an upper limb function recovery device, a lower limb function recovery device, a power supply, a rudder controller and a video playing device. The seat is an adjustable backrest seat, and a backrest is installed on the backrest. The seat is installed with a power supply below, a rudder controller on the back of the seat, an upper limb function recovery device on both sides of the seat, a lower limb function recovery device at the front end below the seat, and a video playing device at the front end of the seat. The above-mentioned patent structure is relatively simple, and the passive lifting training of the limbs is mainly realized by mechanical support, the function is relatively single, and only the basic lifting action can be completed, and the comprehensive training of joint activity, muscle coordination and movement control ability is lacked. At the same time, the above-mentioned patent lacks an adjusting assembly, and cannot be personalized adjusted according to the physical condition of the patient, so that the rehabilitation effect is not good after long-term use. SUMMARY

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present application is to provide a limb recovery training device for neurology.

[0005] The utility model provides a kind of limb recovery training device for neurology, including training chair, handrail, first telescopic rod, fixed seat, sliding block, locking assembly, first articulation, connecting block, second articulation, second plug rod, second handle, support plate and grip bar, training chair left and right sides are connected with handrail, handrail is connected with self-locking first telescopic rod, the upper side of the back of training chair left and right parts is connected with fixed seat, first sliding slot is opened in fixed seat, sliding block is slidably connected in first sliding slot, locking assembly for being fixed in first sliding slot is connected on sliding block, the side of sliding block away from fixed seat is connected with horizontally rotating first articulation, connecting block is hingedly connected on first articulation, connecting block is connected with vertically rotating second articulation, support plate is hingedly connected on second articulation, the top of the side of support plate away from second articulation is connected with grip bar, third sliding slot is opened on connecting block, second plug rod is slidably connected in third sliding slot, second plug rod is inserted with support plate, second handle is connected on the top of second plug rod, and second handle is extended from third sliding slot.

[0006] As improvement of the above scheme, locking assembly includes first plug rod, first handle and return spring, a plurality of insertion holes are opened in the left and right sides of first sliding slot, second sliding slot is opened in the left and right sides of sliding block, first plug rod suitable for insertion hole is slidably connected in second sliding slot, first handle is connected on first plug rod, first handle is extended from second sliding slot, and return spring is connected between first plug rod and sliding block.

[0007] As improvement of the above scheme, further include guard plate, fourth sliding slot is opened on support plate, guard plate for supporting elbow is slidably connected on fourth sliding slot.

[0008] As improvement of the above scheme, further include baffle, the side of left and right support plates away from each other is connected with baffle, and baffle is located on the top of the side of support plate away from grip bar.

[0009] As improvement of the above scheme, further include third articulation, second telescopic rod, pivot, pedal and first torsion spring, third articulation is connected on the left and right sides of training chair seat surface, third articulation is inclined to the side away from each other, self-locking second telescopic rod is hingedly connected on third articulation, pivot is connected on the inner rod of second telescopic rod, pedal is rotatably connected on pivot, and first torsion spring is connected between pedal and pivot.

[0010] As improvement of the above scheme, further include arc plate, arc plate is connected on the top of the side of pedal away from training chair, and gap for toe is left between arc plate and pedal.

[0011] As the improvement of the above-mentioned scheme, it further comprises fourth hinged parts, pressing plates and second torsion springs, the inner walls of the arc-shaped plates are connected with the fourth hinged parts, the fourth hinged parts are connected with the pressing plates, and the second torsion springs are connected between the fourth hinged parts and the pressing plates.

[0012] As the improvement of the above-mentioned scheme, it further comprises first hooks, connecting ropes and second hooks, the bottom of the side, away from the second hinged parts, of the supporting plates is connected with the first hooks, the outer walls of the arc-shaped plates are connected with the second hooks, and the connecting ropes are detachably connected between the first hooks and the second hooks, and the handrails are provided with through holes, and the connecting ropes pass through the through holes.

[0013] Beneficial effects are: 1. The fixing seat, the sliding block, the locking assembly, the first hinged part and the supporting plate are arranged, the abduction angle and the adduction angle of the patient's upper arm are trained, the shoulder joint activity is helped to recover, the joint stiffness and muscle atrophy are prevented, the upper limb motor function reconstruction is promoted, the handgrip is arranged, the hand strength of the patient is recovered and trained, the hand grip ability is improved, the fine action control is improved, the hand muscle strength is enhanced, the hand muscle degradation is prevented, and the self-care ability of the patient is improved.

[0014] 2. The second hinged part and the second inserting rod are further arranged, the patient's arm lifting and lowering action training is carried out, the basic actions such as lifting hands and taking things in daily life are simulated, the self-care ability of the patient is helped to recover, the activity range of the shoulder and elbow joints is improved, the joint stiffness and contracture are prevented, and the upper limb motor function is improved.

[0015] 3. The second telescopic rod, the pedal, the first torsion spring and the arc-shaped plate are further arranged, the patient's leg is recovered and trained, the training action of repeatedly lifting and lowering the legs is repeated to recover and train the lower limbs of the patient, the lower limb muscle strength and endurance are enhanced, the lower limb motor control reconstruction is promoted, and the foundation for standing and walking training is laid.

[0016] 4. The first hook, the connecting rope and the second hook are further arranged, the upper limbs and the lower limbs of the patient are cooperated under the action of the connecting rope, the upper limbs of the patient are weighted trained by the weight of the patient's legs, the training intensity is enhanced, and the overall coordination and nerve integration of the patient are promoted. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first morphological structure schematic view of the application.

[0018] Figure 2 It is a second morphological structure schematic view of the application.

[0019] Figure 3 It is a fixing seat cross-section structure schematic view of the application.

[0020] Figure 4 It is a sliding block cross-section structure schematic view of the application.

[0021] Figure 5 A cross-sectional structural schematic view of the connecting block and the support plate of the present application.

[0022] Figure 6 A structural schematic view of the second hinge, the support plate and the protective disc of the present application.

[0023] Figure 7 A cross-sectional structural schematic view of the pedal of the present application.

[0024] Figure 8 A cross-sectional structural schematic view of the circular arc plate and the pressing plate of the present application.

[0025] In the drawing marks: 1-training chair, 2-armrest, 201-first telescopic rod, 3-fixed seat, 301-first sliding groove, 302-socket, 4-sliding block, 401-second sliding groove, 402-first inserting rod, 403-first handle, 404-reset spring, 5-first hinge, 6-connecting block, 601-second hinge, 602-third sliding groove, 603-second inserting rod, 604-second handle, 7-support plate, 701-fourth sliding groove, 702-protective disc, 8-grip rod, 9-baffle, 10-third hinge, 11-second telescopic rod, 12-rotation shaft, 13-pedal, 14-first torsional spring, 15-circular arc plate, 16-fourth hinge, 17-pressing plate, 18-second torsional spring, 19-first hook, 20-connecting rope, 21-second hook. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] A limb recovery training device for neurology, as shown in Figures 1-8As shown, the training chair 1 includes a chair 1, an armrest 2, a first telescopic rod 201, a fixed seat 3, a sliding block 4, a locking assembly, a first hinge 5, a connecting block 6, a second hinge 601, a second insertion rod 603, a second handle 604, a support plate 7, a handle 8, a protective disc 702 and a baffle 9. The chair 1 is connected with the armrest 2 on both sides. The armrest 2 is connected with the self-locking first telescopic rod 201. The chair back of the chair 1 is connected with the fixed seat 3 on both sides. The fixed seat 3 is provided with a first sliding groove 301. The sliding block 4 is slidably connected in the first sliding groove 301. The sliding block 4 is connected with the locking assembly for fixing in the first sliding groove 301. The sliding block 4 is connected with the horizontally rotating first hinge 5. The first hinge 5 is connected with the connecting block 6. The connecting block 6 is connected with the vertically rotating second hinge 601. The second hinge 601 is connected with the support plate 7. The support plate 7 is connected with the handle 8 on the top of the side away from the second hinge 601. The side wall of the handle 8 is provided with a high-density anti-skid memory sponge. The connecting block 6 is provided with a third sliding groove 602. The second insertion rod 603 is slidably connected in the third sliding groove 602. The second insertion rod 603 is inserted with the support plate 7. The second insertion rod 603 is connected with the second handle 604. The second handle 604 is extended from the third sliding groove 602. The support plate 7 is provided with a fourth sliding groove 701. The fourth sliding groove 701 is slidably connected with the protective disc 702 for supporting the elbow. The side away from each other of the left and right support plates 7 is connected with the baffle 9. The baffle 9 is located on the top of the side away from the handle 8 of the support plate 7. The side close to each other of the left and right baffles 9 is provided with an anti-skid pad.

[0028] As shown in the figure, Figures 1-4 The locking assembly includes a first insertion rod 402, a first handle 403 and a reset spring 404. The first sliding groove 301 is provided with a plurality of insertion holes 302 on both sides. The sliding block 4 is provided with a second sliding groove 401 on both sides. The second sliding groove 401 is slidably connected with the first insertion rod 402 matched with the insertion hole 302. The first insertion rod 402 is connected with the first handle 403. The first handle 403 is extended from the second sliding groove 401. The first insertion rod 402 and the sliding block 4 are connected with the reset spring 404.

[0029] At the beginning, the reset spring 404 is in a natural state, the first insertion rod 402 is inserted into the insertion hole 302, the second insertion rod 603 is connected with the support plate 7, the support plate 7 keeps a horizontal state, the first telescopic rod 201 is in an elongated state, when the patient needs to recover the upper limb, the patient sits on the training chair 1, the arms are placed on the support plate 7, the sliding protection disc 702 is slid, the protection disc 702 supports the elbow of the patient, the support of the elbow reduces the load of the upper limb, prevents the elbow from being forced too much during the training, improves the stability and comfort during the training, reduces the fatigue, both hands hold the handle 8, and the arms are expanded, when the arms are expanded, the support plate 7 is rotated through the first hinge 5, the left and right support plates 7 are rotated away from each other, under the support of the support plate 7, the arms of the patient can be horizontally expanded, after the arms of the patient are expanded as far as possible, the patient holds the handle 8 with both hands, and the arms are collected, when the arms are collected, the support plate 7 is reversed through the first hinge 5, the left and right support plates 7 are rotated close to each other, under the support of the support plate 7, the arms of the patient can be horizontally collected, thus the expansion angle and the collection angle of the arms of the patient are trained, which is helpful to recover the shoulder joint activity, prevent the joint stiffness and muscle atrophy, and promote the upper limb motor function reconstruction, when the patient's hand grip is insufficient, both hands hold the handle 8, and then the handle 8 is released, the gripping and releasing actions are repeated, thus the hand strength of the patient can be recovered and trained, the hand gripping ability is improved, the fine action control is improved, the hand muscle strength is enhanced, the hand muscle degradation is prevented, and the self-care ability of the patient is improved, when the patient's arms are expanded under the condition that the hand grip is insufficient, the hand back or the part close to the wrist of the forearm pushes the baffle 9, the baffle 9 drives the support plate 7 to rotate through the first hinge 5, so that the arms expansion action is realized, when the patient's arms are collected under the condition that the hand grip is insufficient, the hand or the part close to the wrist of the forearm pushes the handle 8, thus the expansion and collection actions can be performed under the condition that the hand grip is insufficient, the early or severe hemiplegic patient can also participate in the training, the rehabilitation process is avoided to be interrupted due to insufficient grip, when the arm lifting training is needed, the second handle 604 is held by the medical staff, the second insertion rod 603 is slid away from the support plate 7 along the third sliding groove 602, the second insertion rod 603 is pulled out of the support plate 7, the patient holds the handle 8 with both hands, the arms are lifted, the handle 8 drives the support plate 7 to rotate upward through the second hinge 601, so that the arm lifting action is realized, the arms are slowly put down, the handle 8 drives the support plate 7 to rotate downward through the second hinge 601, so that the arm putting down action is realized, the basic actions such as lifting the hand and taking things in daily life are simulated, which is helpful to recover the self-care ability of the patient, improve the activity range of the shoulder and elbow joints, prevent the joint stiffness and contracture, and improve the upper limb motor function, when the patient's arms are lifted under the condition that the hand grip is insufficient, the wrist of the patient is bound to the support plate 7 through the elastic band by the medical staff, and the patient repeats the above steps to perform the arm lifting and putting down action training, the whole cycle rehabilitation training is realized, even if the grip is missing, the shoulder and elbow joint flexion and extension functions can be exercised,Prevent contracture, enhance shoulder muscle group control force, after arm lifting and lowering training, medical staff rotate support plate 7 and make it rotate to horizontal state, slide second inserting rod 603 and make it insert into support plate 7 and reset, thereby fixing support plate 7, when patient's upper body is short, medical staff manually hold first handle 403, make first handle 403 slide along second sliding groove 401 and approach each other, reset spring 404 is compressed, first inserting rod 402 is separated from inserting hole 302, make sliding block 4 slide along first sliding groove 301 downward, sliding block 4 drives support plate 7 to move downward, inner rod of first telescopic rod 201 retracts, when patient's arms can be comfortably placed on support plate 7, release first handle 403, reset spring 404 restores original state and makes first inserting rod 402 slide and insert into nearest inserting hole 302, thereby being able to reduce height of support plate 7 and lock sliding block 4, when patient's upper body is long, medical staff make first handle 403 slide along second sliding groove 401 again, first inserting rod 402 slides along second sliding groove 401 and separates from inserting hole 302, reset spring 404 is compressed, make sliding block 4 slide along first sliding groove 301 upward, inner rod of first telescopic rod 201 extends, thereby being able to increase height of support plate 7, lock sliding block 4 through locking assembly again, thereby being able to adjust height of support plate 7 according to different body types of different patients, ensure training posture correct and comfortable, improve training safety and effectiveness, improve applicability of the training device.

[0030] As shown in Figure 1 , Figure 2 , Figure 7 and Figure 8 , further comprising third hinged parts 10, second telescopic rods 11, rotating shafts 12, pedals 13, first torsional springs 14, arc plates 15, fourth hinged parts 16, pressing plates 17, second torsional springs 18, first hooks 19, connecting ropes 20 and second hooks 21, seat surface of training chair 1 is connected with third hinged parts 10 on both sides, third hinged parts 10 are inclined to sides away from each other, self-locking second telescopic rods 11 are hingedly connected to third hinged parts 10, rotating shafts 12 are connected to inner rods of second telescopic rods 11, pedals 13 are rotatably connected to rotating shafts 12, first torsional springs 14 are connected between pedals 13 and rotating shafts 12, arc plates 15 are connected to top of sides of pedals 13 away from training chair 1, gaps for toes are left between arc plates 15 and pedals 13, fourth hinged parts 16 are connected to inner walls of arc plates 15, pressing plates 17 are hingedly connected to fourth hinged parts 16, second torsional springs 18 are connected between fourth hinged parts 16 and pressing plates 17, first hooks 19 are connected to bottom of side of support plate 7 away from second hinged parts 601, second hooks 21 are connected to outer walls of arc plates 15, connecting ropes 20 are detachably connected between first hooks 19 and second hooks 21, through holes are formed in handrails 2, and connecting ropes 20 pass through the through holes.

[0031] Before using the training device to train lower limbs, the first torsional spring 14 and the second torsional spring 18 are in a natural state, the pedal 13 and the pressing plate 17 are in an inclined state, the pedal 13 and the pressing plate 17 are parallel to each other, the second telescopic rod 11 is in an extended state, and the connecting rope 20 is not connected between the first hook 19 and the second hook 21. When a patient needs to perform lower limb recovery training, the patient sits on the training chair 1, the feet are stepped on the pedal 13, the toes are located in the gap between the arc plate 15 and the pedal 13, and the pedal 13 is stepped on with force, so that the inner rod of the second telescopic rod 11 extends, the length of the second telescopic rod 11 adapts to the length of the patient's leg, different patients of different body types can be adapted, the position of the pedal 13 is ensured to be accurate, the training effect of the lower limbs is improved, the patient makes a plantar flexion action, the pedal 13 rotates, the first torsional spring 14 deforms, the patient makes a dorsiflexion action again, the pedal 13 reverses, the first torsional spring 14 reversely deforms, the patient's foot overcomes the elastic restoring force of the first torsional spring 14 with force, so that the patient's foot flexion training can be performed, the ankle joint range of motion is improved, the foot drop and Achilles tendon contracture are prevented, the dorsiflexion and plantar flexion muscle strength is enhanced, and the walking function recovery is beneficial. When training the dorsiflexion action, the patient can use the toes to lift up and top the inner wall of the arc plate 15 to obtain force, so that the success rate and training efficiency of the dorsiflexion action are improved. When the patient's toes are lifted up, the pressing plate 17 rotates, so that the second torsional spring 18 deforms. When the patient's toes are straightened, the second torsional spring 18 returns to the original state, so that the pressing plate 17 reverses. The elastic restoring force of the second torsional spring 18 is overcome when the toes are lifted up, so that the patient's toe flexion training can be performed, the small muscle groups of the sole are activated, the foot proprioception is improved, the gait stability is enhanced, and the foot deformity is prevented. When leg training is needed, the patient lifts up the leg, so that the second telescopic rod 11 rotates through the third hinge 10. After a short time, the patient puts down the leg, so that the second telescopic rod 11 reverses through the third hinge 10. Thus, the patient's leg recovery training can be performed, the above training actions are repeated to perform the lower limb recovery training of the patient, the lower limb muscle strength and endurance are enhanced, the lower limb motor control reconstruction is promoted, and the foundation for standing and walking training is laid. Before the patient performs bilateral arm abduction training, the connecting rope 20 is installed on the first hook 19 and the second hook 21, so that the connecting rope 20 passes through the through hole. The patient steps on the pedal 13. When the patient performs bilateral arm abduction or lifting training, the supporting plate 7 pulls the connecting rope 20 through the first hook 19. The connecting rope 20 pulls the arc plate 15 through the second hook 21, so that the arc plate 15 drives the pedal 13 to move upwards. The second telescopic rod 11 rotates upwards through the third hinge 10. When the patient performs bilateral arm adduction, the supporting plate 7 no longer pulls the connecting rope 20 through the first hook 19. Under the action of the patient's leg gravity, the pedal 13 moves downwards. The second telescopic rod 11 rotates downwards through the third hinge 10. The pedal 13 pulls the connecting rope 20 through the second hook 21, so that the connecting rope 20 reversely pulls the supporting plate 7 to rotate through the first hinge 5 or the second hinge 601. Thus, the patient's upper limbs and lower limbs can be cooperated under the action of the connecting rope 20.The patient's upper limbs are subjected to weight training by the weight of the patient's legs, the training intensity is enhanced, the overall coordination and nerve integration of the patient are promoted, and after the training is completed, the patient can leave the training chair 1.

[0032] The above embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any equivalent changes made according to the content of the claims of the present application shall be included in the scope of the claims of the present application.

Claims

1. A limb recovery training device for neurology, comprising a training chair (1) and an armrest (2), the training chair (1) is connected with the armrest (2) on both sides, characterized in that, The first telescopic rod (201), the fixed seat (3), the sliding block (4), the locking assembly, the first hinged piece (5), the connecting block (6), the second hinged piece (601), the second inserting rod (603), the second handle (604), the support plate (7) and the handle rod (8) are further included, the self-locking first telescopic rod (201) is connected on the handrail (2), the fixed seat (3) is connected on the upper side of the left and right parts of the chair back of the training chair (1), the first sliding groove (301) is formed in the fixed seat (3), the sliding block (4) is slidably connected in the first sliding groove (301), the locking assembly for fixing the sliding block (4) in the first sliding groove (301) is connected on the sliding block (4), the first hinged piece (5) is horizontally rotatably connected on the side of the sliding block (4) away from the fixed seat (3), the connecting block (6) is hingedly connected on the first hinged piece (5), the second hinged piece (601) is vertically rotatably connected on the connecting block (6), the support plate (7) is hingedly connected on the second hinged piece (601), the handle rod (8) is connected on the top of the side of the support plate (7) away from the second hinged piece (601), the third sliding groove (602) is formed in the connecting block (6), the second inserting rod (603) is slidably connected in the third sliding groove (602), the second inserting rod (603) is inserted with the support plate (7), the second handle (604) is connected on the top of the second inserting rod (603), and the second handle (604) extends out of the third sliding groove (602).

2. The device as claimed in claim 1, wherein The locking assembly includes the first inserting rod (402), the first handle (403) and the reset spring (404), the plug hole (302) is formed on the left and right sides of the first sliding groove (301), the second sliding groove (401) is formed in the left and right sides of the sliding block (4), the first inserting rod (402) which is matched with the plug hole (302) is slidably connected in the second sliding groove (401), the first handle (403) is connected on the first inserting rod (402), the first handle (403) extends out of the second sliding groove (401), and the reset spring (404) is connected between the first inserting rod (402) and the sliding block (4).

3. The device as claimed in claim 2, wherein the device is characterized by: The training device further includes the protection disc (702), the fourth sliding groove (701) is formed in the support plate (7), and the protection disc (702) for supporting the elbow is slidably connected on the fourth sliding groove (701).

4. The device as claimed in claim 3, wherein The training device further includes the baffle (9), the baffle (9) is connected on the side of the left and right support plates (7) away from each other, and the baffle (9) is located on the top of the side of the support plate (7) away from the handle rod (8).

5. The device as claimed in claim 4, wherein the device is characterized by: The training device further comprises third hinges (10), second telescopic rods (11), pivots (12), pedals (13) and first torsional springs (14), the seat of the training chair (1) is connected with the third hinges (10) on both sides, the third hinges (10) are inclined to the sides away from each other, the second telescopic rods (11) are connected to the third hinges (10) in a hinged manner, the inner rods of the second telescopic rods (11) are connected with the pivots (12), the pedals (13) are connected to the pivots (12) in a rotatable manner, and the first torsional springs (14) are connected between the pedals (13) and the pivots (12).

6. The device as claimed in claim 5, wherein The training device further comprises arc plates (15), the top of the side of the pedals (13) away from the training chair (1) is connected with the arc plates (15), and a gap for the toes to enter is formed between the arc plates (15) and the pedals (13).

7. The device as claimed in claim 6, wherein the device is characterized by: The training device further comprises fourth hinges (16), pressing plates (17) and second torsional springs (18), the inner walls of the arc plates (15) are connected with the fourth hinges (16), the pressing plates (17) are connected to the fourth hinges (16) in a hinged manner, and the second torsional springs (18) are connected between the fourth hinges (16) and the pressing plates (17).

8. The device as claimed in claim 7, wherein the device is characterized by: The training device further comprises first hooks (19), connecting ropes (20) and second hooks (21), the bottom of the side of the support plates (7) away from the second hinges (601) is connected with the first hooks (19), the outer walls of the arc plates (15) are connected with the second hooks (21), the connecting ropes (20) are detachably connected between the first hooks (19) and the second hooks (21), and the handrails (2) are provided with through holes, and the connecting ropes (20) pass through the through holes.

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