CN113198135B

CN113198135B - Department of neurology shank nerve resumes training auxiliary device

Info

Publication number: CN113198135B
Application number: CN202110394371.2A
Authority: CN
Inventors: 张华佳
Original assignee: Nanjing Smart Sunshine Technology Co ltd
Current assignee: Nanjing Smart Sunshine Technology Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2023-05-30
Anticipated expiration: 2041-04-13
Also published as: CN113198135A

Abstract

The invention relates to an auxiliary device, in particular to a leg nerve recovery training auxiliary device for neurology. The invention provides a neurology leg nerve recovery training auxiliary device which can realize the whole body exercise of a patient, improve the safety coefficient of the patient in the training process and effectively recover the leg nerves of the patient. A neurological leg nerve rehabilitation training aid comprising: the bottom plate is provided with a mounting rack; the connecting rods are arranged on two sides of the mounting frame; the training mechanism is arranged on the mounting frame; the mounting frame is provided with the hand mechanism; the middle part is equipped with locking mechanism on the bottom plate. According to the invention, after the conveyor belt rotates slowly, an experimenter can perform small-amplitude running training on the conveyor belt, so that the leg nerves of the experimenter are helped to recover, and the conveyor belt is used for assisting the experimenter in running training.

Description

Department of neurology shank nerve resumes training auxiliary device

Technical Field

The invention relates to an auxiliary device, in particular to a leg nerve recovery training auxiliary device for neurology.

Background

Traditional medical shank training ware can not adjust according to patient's shank size, can not let the patient temper own foot and leg, also can not let the patient reach the exercise of whole body, can not adjust training ware height and angle according to patient's self demand simultaneously, uses inconvenient moreover.

Patent application CN211383654U, the publication day is 20200901, disclose a shank training ware, including the pull ring, the stay cord, the bed board, driving motor, a support frame, the foot rest, connecting device, slide rail and slide etc., patient's flat seat is on the bed board, the shank is placed on the foot rest, the helper starts driving motor, driving motor drives connecting device operation, connecting device drives the slide and slides, the slide drives the foot rest and slides, make the patient carry out simple shank and stretch the training, help patient resumes shank nerve, however, the device can't realize patient's whole body exercise, recovery speed is slow.

Therefore, the neurology leg nerve recovery training auxiliary device is designed for realizing the whole body exercise of the patient, improving the safety coefficient of the patient in the training process and effectively recovering the leg nerves of the patient.

Disclosure of Invention

In order to overcome the defects that a transmission trainer cannot realize the whole body exercise of a patient, cannot ensure the safety coefficient of the patient in the training process and cannot effectively recover the leg nerves of the patient, the technical problem of the invention is as follows: the neurology leg nerve recovery training auxiliary device is capable of realizing whole body exercise of a patient, improving safety coefficient of the patient in the training process and effectively recovering leg nerves of the patient.

The technical proposal is as follows: a neurological leg nerve rehabilitation training aid comprising:

the bottom plate is provided with a mounting rack;

the connecting rods are arranged on two sides of the mounting frame;

the training mechanism is arranged on the mounting frame;

the mounting frame is provided with the hand mechanism;

the middle part is equipped with locking mechanism on the bottom plate.

Optionally, the training mechanism comprises:

the first rotating shafts are rotatably arranged on the two sides of the mounting frame;

the belt pulleys are arranged on two sides of the first rotating shaft, and the number of the belt pulleys is four;

the conveying belt is connected between the four belt pulleys;

and the motor is arranged on the two parts of the bottom plate, and the output shafts of the two motors are connected with the first rotating shaft.

Optionally, the hand mechanism comprises:

the support frame is arranged at the top of the mounting frame;

the middle of the upper part of the support frame is provided with a first slide rail;

the first sliding rail is provided with a hand lever in a sliding manner;

and the sliding sleeves are respectively arranged on the two connecting rods and are connected with the hand bars in a sliding manner.

Optionally, the locking mechanism includes:

the middle part of the hand lever is provided with two mounting blocks;

the first movable rod is connected between the two mounting blocks in a sliding manner;

the two sides of the first movable rod are wound with the first springs, and the two ends of the first springs are respectively connected with the first movable rod and the mounting block;

the middle part is equipped with the dog on the bottom plate, opens flutedly on the dog, and the dog cooperates with first movable rod.

Optionally, a supporting mechanism is further included, and the supporting mechanism includes:

the bottom plate is provided with two second sliding rails;

the first sliding block is connected between the upper parts of the two second sliding rails in a sliding manner;

the second springs are wound on the two second sliding rails, and two ends of each second spring are respectively connected with the second sliding rail and the first sliding block;

the second rotating shaft is rotatably arranged in the middle of the first sliding block;

the seat is arranged at the top end of the second rotating shaft.

Optionally, a steering mechanism is further included, the steering mechanism includes:

the bottom plate is provided with a thread seat which is positioned at one side of the second sliding rail;

the lower part of the thread seat is provided with a second sliding block in a sliding manner;

the two sides of the lower part of the thread seat are wound with the third springs, and the two ends of the third springs are respectively connected with the thread seat and the second sliding block;

the upper part of the threaded seat is provided with a threaded rod in a threaded manner, and the threaded rod is in threaded connection with the second sliding block;

the upper part of the threaded rod is provided with a spur gear;

the second rotating shaft is provided with a unidirectional gear which is meshed with the straight gear;

the compression bar is arranged on the two parts of the first sliding block, and the compression bar is connected with the second sliding block.

Optionally, a massage mechanism is further included, and the massage mechanism includes:

the brackets are arranged on the two parts of the mounting frame;

the upper parts of the two brackets are rotatably provided with rotating rods;

the roller is arranged at the top ends of the two rotating rods.

Optionally, a protection mechanism is further included, and the protection mechanism includes:

the connecting blocks are arranged on the two connecting rods in a sliding mode;

the upper parts of the two connecting blocks are provided with second movable rods in a sliding manner;

the baffle plates are arranged on the two second movable rods;

the two second movable rods are wound with the fourth spring, and two ends of the fourth spring are respectively connected with the connecting block and the second movable rods;

the first wedge blocks are arranged on the two second movable rods;

and the second wedge blocks are arranged on the two parts of the mounting frame, the second wedge blocks are positioned on one side of the bracket, and the second wedge blocks are matched with the first wedge blocks.

The invention has the beneficial effects that: 1. according to the invention, after the conveyor belt rotates slowly, an experimenter can perform small-amplitude running training on the conveyor belt, so that the leg nerves of the experimenter are helped to recover, and the conveyor belt is used for assisting the experimenter in running training;

2. according to the invention, the walking rod is vertically slid, so that the walking rod is adjusted to a proper height, an experimenter can easily hold the walking rod, and the effect of sliding the walking rod to adjust the height is realized;

3. according to the invention, the first movable rod is matched with the stop block, and is sunk into the groove of the stop block, so that the first movable rod stops moving backwards, and is locked, and the effect of locking the first movable rod by the stop block is realized;

4. according to the invention, the seat moves downwards, the seat drives the second rotating shaft to move downwards, the second rotating shaft drives the first sliding block to move downwards, and the second spring is compressed, so that the effect of carrying an experienter on the seat is realized;

5. according to the leg massage device, after the roller is contacted with the legs of the experimenter, the roller massages the legs of the experimenter, so that fatigue of the legs of the experimenter is relieved, and an effect of relieving the fatigue of the legs is realized.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the training mechanism of the present invention.

Fig. 3 is a schematic perspective view of the hand mechanism of the present invention.

Fig. 4 is a schematic perspective view of the locking mechanism of the present invention.

Fig. 5 is a schematic perspective view of the support of the present invention.

Fig. 6 is a schematic perspective view of the steering mechanism of the present invention.

Fig. 7 is a schematic perspective view of the massage mechanism of the present invention.

Fig. 8 is a schematic perspective view of a protection mechanism of the present invention.

Meaning of reference numerals in the drawings: 1. the floor, 2, the mounting bracket, 3, the connecting rod, 4, the training mechanism, 41, the first rotating shaft, 42, the belt pulley, 43, the conveyor belt, 44, the motor, 5, the hand mechanism, 51, the support frame, 52, the first sliding rail, 53, the hand lever, 54, the sliding sleeve, 6, the locking mechanism, 61, the mounting block, 62, the first spring, 63, the first movable lever, 64, the stopper, 7, the supporting mechanism, 71, the second sliding rail, 72, the second spring, 73, the first sliding block, 74, the second rotating shaft, 75, the seat, 8, the steering mechanism, 81, the screw seat, 82, the threaded rod, 83, the second sliding block, 84, the third spring, 85, the spur gear, 86, the unidirectional gear, 87, the pressing lever, 9, the massaging mechanism, 91, the support frame, 92, the rotating lever, 93, the roller, 10, the protection mechanism, 101, the connecting block, 102, the second movable lever, 103, 104, the fourth spring, 105, the first wedge block, 106, and the second wedge block.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

Example 1

The utility model provides a department of neurology shank nerve recovery training auxiliary device, as shown in fig. 1, including bottom plate 1, mounting bracket 2, connecting rod 3, training mechanism 4, hand mechanism 5 and locking mechanism 6, be equipped with mounting bracket 2 on bottom plate 1, mounting bracket 2 left and right sides all is equipped with connecting rod 3, is equipped with training mechanism 4 on the mounting bracket 2, and the front side is equipped with hand mechanism 5 on the mounting bracket 2, and front side middle part is equipped with locking mechanism 6 on the bottom plate 1.

When people want to carry out recovery training to leg nerves, can use this kind of department of neurology leg nerves to resume training auxiliary device, first of all, the facilitator pulls locking mechanism 6 forward, locking mechanism 6 keeps away from hand mechanism 5, the facilitator is according to the actual conditions of experimenter, the height of hand mechanism 5 is adjusted, after hand mechanism 5 adjustment is accomplished, locking mechanism 6 cooperates with hand mechanism 5, locking mechanism 6 fixes hand mechanism 5, after hand mechanism 5 is fixed, the experimenter stands on training mechanism 4, experimenter's hand is placed on hand mechanism 5, hand mechanism 5 can prevent that the experimenter from falling down, the facilitator starts training mechanism 4, after training mechanism 4 operation, make experimenter carry out the running training of a small margin on training mechanism 4, help experimenter's leg nerves resume, after the experimenter training, the facilitator closes training mechanism 4, then experimenter leaves training mechanism 4.

Example 2

On the basis of embodiment 1, as shown in fig. 2-4, the training mechanism 4 comprises a first rotating shaft 41, belt pulleys 42, a conveyor belt 43 and a motor 44, wherein the first rotating shaft 41 is rotatably arranged on the front side and the rear side of the mounting frame 2, the belt pulleys 42 are arranged on the left side and the right side of the first rotating shaft 41, the number of the belt pulleys 42 is four, the conveyor belt 43 is connected between the four belt pulleys 42, the motor 44 is arranged on the left part and the right part of the front side of the bottom plate 1, and the output shafts of the two motors 44 are connected with the first rotating shaft 41 on the front side.

Because the leg nerves of the experimenter are damaged, the experimenter supports the experimenter to stand on the conveyor belt 43, then the assistor starts the motor 44, the output shaft of the motor 44 drives the first rotating shaft 41 at the front side to rotate, the first rotating shaft 41 at the front side drives the belt pulley 42 at the front side to rotate, the belt pulley 42 at the front side drives the conveyor belt 43 to rotate, the belt pulley 43 at the rear side drives the first rotating shaft 41 at the rear side to rotate, after the conveyor belt 43 slowly rotates, the experimenter can perform small-amplitude running training on the conveyor belt 43, the leg nerves of the experimenter are helped to recover, the effect of assisting the experimenter to run training is achieved, after the running training of the experimenter is finished, the assistor turns off the motor 44, all actions are stopped, and the experimenter supports the experimenter away from the conveyor belt 43.

The hand mechanism 5 comprises a support frame 51, a first slide rail 52, hand rods 53 and sliding sleeves 54, wherein the support frame 51 is arranged at the top of the front side of the mounting frame 2, the first slide rail 52 is arranged in the middle of the upper part of the support frame 51, the hand rods 53 are arranged on the first slide rail 52 in a sliding mode, the sliding sleeves 54 are arranged on the inner sides of the two connecting rods 3, and the sliding sleeves 54 are connected with the hand rods 53 in a sliding mode.

The experimenter stands behind conveyer belt 43, and the experimenter's hand is put on hand lever 53, and according to the actual conditions of experimenter, the helper can slide hand lever 53 from top to bottom, adjusts hand lever 53 to suitable height, and the experimenter can easily hold hand lever 53, realizes the effect of hand lever 53 slip adjustment height, and the experimenter runs after the training, loosens hand lever 53, leaves conveyer belt 43 afterwards.

The locking mechanism 6 comprises a mounting block 61, a first spring 62, a first movable rod 63 and a stop block 64, wherein two mounting blocks 61 are arranged in the middle of the front side of the walking rod 53, the first movable rod 63 is connected between the two mounting blocks 61 in a sliding mode, the first spring 62 is wound on the left side and the right side of the first movable rod 63, two ends of the first spring 62 are respectively connected with the first movable rod 63 and the mounting blocks 61, the stop block 64 is arranged in the middle of the upper front side of the bottom plate 1, a groove is formed in the stop block 64, and the stop block 64 is matched with the first movable rod 63.

When the helper wants to adjust the height of the hand lever 53, the helper pulls the first movable lever 63 forward, the first spring 62 is compressed, the first movable lever 63 is separated from the stop block 64, the helper can slide the hand lever 53 up and down, thereby adjusting the height of the hand lever 53, after the height adjustment of the hand lever 53 is completed, the first movable lever 63 is released, the first spring 62 is reset, thereby driving the first movable lever 63 to move backward, the first movable lever 63 is matched with the stop block 64, the first movable lever 63 is sunk into a groove of the stop block 64, the first movable lever 63 stops moving backward, and the first movable lever 63 is locked, so that the effect of locking the first movable lever 63 by the stop block 64 is realized.

Example 3

On the basis of embodiment 2, as shown in fig. 5-8, the device further comprises a supporting mechanism 7, the supporting mechanism 7 comprises a second slide rail 71, a second spring 72, a first slide block 73, a second rotating shaft 74 and a seat 75, two second slide rails 71 are arranged on the rear side of the bottom plate 1, the first slide block 73 is connected between the upper parts of the two second slide rails 71 in a sliding mode, the second springs 72 are wound on the two second slide rails 71, two ends of the second spring 72 are respectively connected with the second slide rail 71 and the first slide block 73, the second rotating shaft 74 is arranged in the middle of the first slide block 73 in a rotating mode, and the seat 75 is arranged at the top end of the second rotating shaft 74.

Because the experimenter is neural impaired in shank, action is inconvenient, the helper is in good condition, the experimenter sits on seat 75, receive experimenter weight influence, make seat 75 downward movement, seat 75 drives second pivot 74 downward movement, second pivot 74 drives first slider 73 downward movement, second spring 72 is compressed, realize seat 75 bears the experimenter effect, the experimenter is seated and accomplish the back, then the helper rotates seat 75, seat 75 drives second pivot 74 rotation, seat 75 drives the experimenter and rotates to conveyer belt 43 rear side, the experimenter again places the hand on hand rest 53, the experimenter is through walking slowly on conveyer belt 43 of hand rest 53, after the experimenter breaks away from seat 75, thereby drive first slider 73, second pivot 74 and seat 75 upward movement are to resume the normal position, after the experimenter runs training, the experimenter is accomplished through walking slowly to seat 75 the front again, and on seat 75, the experimenter weight influence, seat 75 drives second pivot 74 and first slider 73 downward movement, second spring 72 is rotated by the compression, the second spring 72 is rotated to the back, the back 75 is driven to the back, the back position is carried to the seat 75, the back is rotated to the back, the back position is carried to the seat 75, thereby the experimenter is in contrast to the seat 75, the back is rotated to the back, the experimenter is in contrast to the seat 75, the back, the experimenter is rotated, the seat 75 and is moved, the back to the back, the experimenter is moved, and is moved to the seat 75, and is moved.

The steering mechanism 8 comprises a threaded seat 81, a threaded rod 82, a second sliding block 83, a third spring 84, a spur gear 85, a one-way gear 86 and a pressing rod 87, wherein the threaded seat 81 is arranged on the upper rear side of the bottom plate 1, the threaded seat 81 is positioned behind the second sliding rail 71, the second sliding block 83 is arranged on the lower portion of the threaded seat 81 in a sliding mode, the third spring 84 is wound on the left side and the right side of the lower portion of the threaded seat 81, two ends of the third spring 84 are respectively connected with the threaded seat 81 and the second sliding block 83, the threaded rod 82 is arranged on the upper portion of the threaded seat 81 in a threaded mode, the threaded rod 82 is in threaded connection with the second sliding block 83, the spur gear 85 is arranged on the upper portion of the threaded rod 82, the one-way gear 86 is meshed with the spur gear 85, the pressing rod 87 is arranged on the left side and the right side of the rear side of the first sliding block 73, and the pressing rod 87 is connected with the second sliding block 83.

The experimenter sits behind seat 75, receive experimenter's weight influence, make seat 75 drive second pivot 74 and first slider 73 downwardly moving, first slider 73 drives depression bar 87 downwardly moving, depression bar 87 drives second slider 83 downwardly moving, third spring 84 is compressed, second slider 83 drives threaded rod 82 rotation, threaded rod 82 drives spur gear 85 rotation, spur gear 85 meshes with unidirectional gear 86, thereby drive unidirectional gear 86 rotation, unidirectional gear 86 drives second pivot 74 and seat 75 rotation, make seat 75 rotate to the conveyer belt 43 rear side, realize seat 75 automatic steering effect, the experimenter breaks away from seat 75 after, thereby drive second slider 83, depression bar 87 and first slider 73 upwardly moving, second slider 83 drives threaded rod 82 reverse rotation, threaded rod 82 drives spur gear 85 reverse rotation, spur gear 85 meshes with unidirectional gear 86, unidirectional gear 86 reverses.

The massage device comprises a mounting frame 2, and is characterized by further comprising a massage mechanism 9, wherein the massage mechanism 9 comprises a bracket 91, rotating rods 92 and rollers 93, the left and right parts of the rear side of the mounting frame 2 are respectively provided with the bracket 91, the upper parts of the two brackets 91 are respectively provided with the rotating rods 92 in a rotating way, and the top ends of the two rotating rods 92 are respectively provided with the rollers 93.

When the experimenter finishes running training, when resting on the seat 75, the assisting person pushes the rotating rod 92 inwards, the rotating rod 92 drives the roller 93 to move downwards, after the roller 93 contacts with the legs of the experimenter, the roller 93 massages the legs of the experimenter, fatigue of the legs of the experimenter is relieved, the effect of relieving the fatigue of the legs is achieved, after the massage of the experimenter is finished, the assisting person pulls the roller 93 upwards, the roller 93 is separated from the legs of the experimenter, and the roller 93 drives the rotating rod 92 to move back to the outside to restore to the original position.

The protection mechanism 10 comprises a connecting block 101, a second movable rod 102, a baffle 103, a fourth spring 104, a first wedge 105 and a second wedge 106, wherein the connecting block 101 is arranged on the two connecting rods 3 in a sliding mode, the second movable rod 102 is arranged on the upper parts of the two connecting blocks 101 in a sliding mode, the baffle 103 is arranged on the two second movable rods 102, the fourth spring 104 is wound on the two second movable rods 102, the two ends of the fourth spring 104 are respectively connected with the connecting block 101 and the second movable rod 102, the first wedge 105 is arranged on the two second movable rods 102, the second wedge 106 is arranged on the left and right parts of the rear side of the mounting frame 2, and the second wedge 106 is positioned in front of the bracket 91 and is matched with the first wedge 105.

When the experimenter enters a position between two baffles 103, the helper pushes the connecting block 101 forward, the experimenter moves along with the connecting block, the connecting block 101 drives the second movable rod 102 to move forward, the second movable rod 102 drives the baffles 103 to move forward, the second movable rod 102 drives the first wedge 105 to move forward, the first wedge 105 is separated from the second wedge 106, the fourth spring 104 in a stretching state is reset, thereby driving the second movable rod 102 and the baffles 103 to move inwards, the baffles 103 are contacted with the experimenter, the experimenter is prevented from falling down in the running training process, the effect of preventing falling down of the baffles 103 is achieved, after the running training of the experimenter is completed, the helper pushes the connecting block 101 backward, the experimenter moves along with the connecting block 101, the connecting block 101 drives the second movable rod 102, the baffles 103 and the first wedge 105 to move backward, the first wedge 105 is matched with the second wedge 106, the first wedge 105 is driven to move outwards and the second movable rod 102 and the baffles 103 are driven to move outwards and the fourth spring 104 is stretched, and the baffles 103 are separated from the experimenter.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. Department of neurology shank nerve resumes training auxiliary device, characterized by includes:

the base plate (1), the base plate (1) is provided with a mounting rack (2);

the connecting rods (3) are arranged on two sides of the mounting frame (2);

the training mechanism (4) is arranged on the mounting frame (2);

the hand-held mechanism (5) is arranged on the mounting frame (2);

the middle part of the bottom plate (1) is provided with a locking mechanism (6);

the training mechanism (4) comprises:

the first rotating shafts (41) are rotatably arranged on the two sides of the mounting frame (2);

the belt pulleys (42) are arranged on two sides of the first rotating shaft (41), and the number of the belt pulleys (42) is four;

a conveyor belt (43), wherein the conveyor belt (43) is connected between the four belt pulleys (42);

the motor (44) is arranged at the two parts of the bottom plate (1), and the output shafts of the two motors (44) are connected with the first rotating shaft (41);

the hand mechanism (5) comprises:

the support frame (51) is arranged at the top of the mounting frame (2);

the middle of the upper part of the supporting frame (51) is provided with a first sliding rail (52);

the first sliding rail (52) is provided with a hand lever (53) in a sliding manner;

the sliding sleeves (54) are arranged on the two connecting rods (3), and the sliding sleeves (54) are connected with the hand rod (53) in a sliding manner;

the locking mechanism (6) comprises:

the middle part of the hand lever (53) is provided with two mounting blocks (61);

a first movable rod (63), wherein the first movable rod (63) is connected between the two mounting blocks (61) in a sliding manner;

the first springs (62) are wound on two sides of the first movable rod (63), and two ends of the first springs (62) are respectively connected with the first movable rod (63) and the mounting block (61);

the middle part on the bottom plate (1) is provided with a stop block (64), the stop block (64) is provided with a groove, and the stop block (64) is matched with the first movable rod (63);

still including supporting mechanism (7), supporting mechanism (7) include:

the second sliding rails (71), two second sliding rails (71) are arranged on the bottom plate (1);

the first sliding blocks (73) are connected between the upper parts of the two second sliding rails (71) in a sliding manner;

the second springs (72) are wound on the two second sliding rails (71), and two ends of each second spring (72) are respectively connected with the second sliding rail (71) and the first sliding block (73);

the second rotating shaft (74), the middle part of the first sliding block (73) is rotatably provided with the second rotating shaft (74);

a seat (75) is arranged at the top end of the second rotating shaft (74);

the steering mechanism (8) is further included, and the steering mechanism (8) comprises:

the screw seat (81) is arranged on the bottom plate (1), and the screw seat (81) is positioned on one side of the second sliding rail (71);

a second slider (83), the lower part of the screw seat (81) is provided with the second slider (83) in a sliding manner;

the third springs (84) are wound on two sides of the lower part of the thread seat (81), and two ends of each third spring (84) are respectively connected with the thread seat (81) and the second sliding block (83);

the threaded rod (82) is arranged on the upper portion of the threaded seat (81) in a threaded mode, and the threaded rod (82) is connected with the second sliding block (83) in a threaded mode;

a spur gear (85), wherein the upper part of the threaded rod (82) is provided with the spur gear (85);

a unidirectional gear (86), the second rotating shaft (74) is provided with a unidirectional gear (86), and the unidirectional gear (86) is meshed with the straight gear (85);

the pressing rods (87) are arranged on the two parts of the first sliding block (73), and the pressing rods (87) are connected with the second sliding block (83);

the utility model also comprises a massage mechanism (9), wherein the massage mechanism (9) comprises:

the support (91) is arranged on the upper two parts of the mounting frame (2);

the upper parts of the two brackets (91) are respectively provided with a rotating rod (92) in a rotating way;

the top ends of the two rotating rods (92) are provided with rollers (93);

also comprises a protection mechanism (10), wherein the protection mechanism (10) comprises:

the connecting blocks (101) are arranged on the two connecting rods (3) in a sliding mode, and the connecting blocks (101) are arranged on the two connecting rods;

the upper parts of the two connecting blocks (101) are provided with the second movable rods (102) in a sliding manner;

the baffle plates (103) are arranged on the two second movable rods (102);

the fourth springs (104) are wound on the two second movable rods (102), and two ends of each fourth spring (104) are connected with the connecting block (101) and the second movable rod (102) respectively;

the first wedge-shaped blocks (105) are arranged on the two second movable rods (102);

the second wedge blocks (106) are arranged on the two parts of the mounting frame (2), the second wedge blocks (106) are located on one side of the bracket (91), and the second wedge blocks (106) are matched with the first wedge blocks (105).