CN111616923A - Orthopedics postoperative resumes trainer - Google Patents

Abstract

The invention discloses an orthopedic postoperative recovery training device, which relates to the technical field of rehabilitation equipment and comprises: the lower limb training device, the upper limb training device and the auxiliary assembly are arranged on the bracket; the lower limb training device can carry out the shank training of multiple different forms under the drive of a drive assembly, upper limbs training device can train to patient's upper limbs, supplementary subassembly can provide necessary support and protection for the patient in training process, make the patient reach the most comfortable training position, and can reduce the patient risk of falling down the injury in the training, the device overall structure is simple, easy and simple to handle, and the function is comprehensive practical, the training process need not other people and assists too much, time saving and labor saving.

Description

Orthopedics postoperative resumes trainer

Technical Field

The invention relates to the technical field of rehabilitation equipment, in particular to an orthopedic postoperative rehabilitation training device.

Background

After an operation, an orthopedic patient generally needs to lie in bed for a long time to rest, and the operation part needs to be fixed for a long time, so that the limbs of the patient cannot be subjected to exercise training for a long time, the coordination of the limbs is poor, and the later-stage daily life is seriously influenced.

At present, most orthopedic rehabilitation training devices are driven by manpower, the problem of overlarge strength exists for the person who is just healed, secondary injury is extremely easy to cause to the damaged part of a patient, and certain risk exists. For example, during leg rehabilitation training, a person generally holds the leg to perform rehabilitation training, which wastes time and labor, and the person holding the leg is easy to fatigue, so that orthopedic patients cannot exert strength to influence the rehabilitation effect. The existing mechanical driving type rehabilitation training equipment is various, but most of the existing mechanical driving type rehabilitation training equipment is complex in structure and operation and single in function, and one piece of equipment can only be used for training one part or only one training mode.

Disclosure of Invention

The invention aims to provide an orthopedic postoperative recovery training device, which aims to solve the problems that the existing orthopedic postoperative recovery training equipment is complex in structure and complex in operation and has a single training mode and a single training part.

The technical scheme for solving the technical problems is as follows:

an orthopedic post-operative recovery training device comprising: the lower limb training device, the upper limb training device and the auxiliary assembly are arranged on the bracket; the support includes: the lower limb training device is arranged at one end of the vertical fixing plate close to the bottom plate, and the upper limb training device is arranged on the first fixing rod; the lower limb training device comprises: the pedal and the supporting plate are connected with the first driving assembly; the first drive assembly includes: the disc is driven by a first motor, the swing rod and the driving rod, the disc surface of the disc is parallel to the plate surface of the vertical fixing plate, the disc is rotatably arranged on the vertical fixing plate, a protruding block is arranged on the disc surface of the disc, which is far away from the center of the disc, a protruding block sliding groove matched with the protruding block is arranged on the swing rod, the swing rod is arranged on the protruding block in a sliding mode through the protruding block sliding groove, the driving rod is horizontally arranged on the vertical fixing plate in a sliding mode, and the driving rod; the side wall of the pedal is arranged on the driving rod and the pedal is arranged on the bottom plate in a sliding manner; the supporting plate is arranged on the lug; the upper limbs training subassembly includes: the spring rope fixing device comprises a plurality of spring ropes vertically arranged on a first fixing rod and a plurality of handles arranged at the lower ends of the spring ropes, wherein the handles are arranged at intervals in the vertical direction, and the handle positioned at the uppermost end is detachably connected with the spring ropes; the auxiliary assembly includes: the armrest is arranged on the vertical fixing plate, the height-adjustable seat is arranged on the bottom plate, and the sheath is arranged on the second fixing rod; the sheath is arranged on the second fixing rod through a plurality of pull ropes, one end of each pull rope is wound on the second fixing rod, the other end of each pull rope is arranged on the sheath, and a second driving assembly is arranged at one end of each second fixing rod.

Be equipped with lower limb trainer on this orthopedics postoperative resumes trainer and can carry out the rehabilitation training to lower orthopedics patient, be equipped with footboard and backup pad among the lower limb trainer, the quantity of footboard and backup pad is two, and bilateral symmetry sets up. The two pedals can move back and forth under the driving of the driving component, the back and forth movement directions of the two pedals are set to be opposite, and the patient can stand on the two pedals by feet, so that the leg striding training can be realized; the backup pad sets up on the lug, and the lug rotates along with the disc, and the backup pad also realizes around, reciprocates, and the patient sits on the seat, and the both legs are placed in the backup pad, can make the both legs remove along with the backup pad, make patient's shank muscle and joint obtain the training. The upper limbs trainer is mainly used for arm muscle training or hand grasping training of a patient, the upper limbs trainer is provided with a spring rope, a plurality of handles are arranged on the spring rope, the handles with different heights can be selected by the patient, and compared with the lifting handle, the handle is simple in structure, free of adjustment and easy and convenient to operate. The lower extreme detachable of spring rope sets up on the handle of highest department, and before the training, medical personnel can select suitable training intensity for it according to patient's health condition. Still be equipped with the auxiliary assembly among the device, mainly used assists the patient and trains, protects its travelling comfort in the training to guarantee that it can not be injured in the training. When the patient stands on the footboard and takes a step when training, the handrail of both sides can be held to both hands, nevertheless to the serious patient of low limbs damage, its low limbs are unstable, empty easily or press the health strength on both hands easily, consequently set up the sheath, this sheath accessible second drive assembly adjustment height, the patient is fixed this sheath at chest belly, this sheath can play certain tractive effect upwards to the patient, avoids the strength of patient's limbs to press on both hands totally, also can avoid the patient to topple over the tumble injury. The form of sheath does not do specifically and prescribes a limit to, and the sheath can be a rectangle sheet structure, and both ends set up fixing device such as magic subsides, and the patient twines the sheath around the chest belly through the magic paste fixed can, the sheath can also be the form of vest, the patient is direct wears the sheath on one's body. This auxiliary assembly still includes that a slip sets up on the bottom plate and height position adjustable seat, when the patient need use the backup pad, need sit on the seat, when the patient takes a step on the leg training, also can sit on the seat, when the patient carries out the upper limbs training, can adjust the seat to carry out the upper limbs training under the upper limbs training device.

Further, in a preferred embodiment of the present invention, the swing link includes: the vertical swing rod and the fan-shaped swing rod are arranged at one end, close to the driving rod, of the vertical swing rod, the protruding block sliding groove extends along the length direction of the vertical swing rod, and the fan-shaped swing rod is connected with the driving rod through tooth meshing.

The lug sets up in the lug spout, and the lateral wall contacts with the lateral wall of lug spout all the time about the lug, and the lug can remove along the length extending direction of lug spout to when the disc rotates, the lug can drive vertical pendulum rod and remove about, thereby drive the fan-shaped pendulum rod of vertical pendulum rod lower extreme and control the rotation, fan-shaped pendulum rod can drive the axial back-and-forth movement of actuating lever along the actuating lever.

Further, in a preferred embodiment of the present invention, the second driving assembly includes: the first chain wheel is arranged at one end of the second fixing rod, the second chain wheel is arranged on the vertical fixing plate, the transmission chain is arranged between the first chain wheel and the second chain wheel, and the second chain wheel is provided with a second motor.

The second driving component is used for adjusting the height of the sheath in the vertical direction, so that the height of different patients can be adapted or the protection requirements of different degrees can be met.

Further, in a preferred embodiment of the present invention, the lower surface of the pedal is provided with a plurality of sliding blocks, the bottom plate is provided with a sliding way matched with the sliding blocks, and the sliding blocks are slidably disposed in the sliding way.

Because of drive arrangement sets up on the vertical fixed plate of side, but then the footboard direct sliding sets up on the bottom plate, compares with the structure of drive arrangement setting in the footboard below, and the footboard setting position is lower in the device, more is favorable to making patient keep balance, reduces patient's injured risk.

Further, in the preferred embodiment of the present invention, the bottom of the slider is further provided with a ball.

The bottom of the sliding block is provided with the ball, so that the friction force between the sliding block and the sliding way can be further reduced, the consumption of driving force is reduced, and energy is saved.

Further, in the preferred embodiment of the present invention, the upper surface of the pedal is provided with a non-slip mat and a plurality of fixing straps.

Set up the slipmat on the footboard and reduce the risk of skidding, and the fixed band can be fixed patient's both feet on the footboard, further prevents that patient's both feet from landing from the footboard, and this fixed band form does not do specifically and prescribes a limit to, and in this scheme, this fixed band adopts the fixed band that is similar to the area magic subsides on the roller skate.

Further, in a preferred embodiment of the present invention, the support plate includes: the connecting plate is arranged on the convex block, and the supporting plate body is connected with the connecting plate through a 90-degree locking hinge.

When the pedal is used, the supporting plate body can be folded into a vertical state through the 90-degree locking hinge, and the supporting plate body is prevented from influencing the two legs of a patient to stand on the pedal.

Further, in a preferred embodiment of the present invention, the supporting plate body is further provided with a baffle.

When the legs or feet of the patient are placed on the supporting plate body, the two sides of the baffle plates can prevent the legs or feet from falling off.

Further, in a preferred embodiment of the present invention, a handle fixing groove is formed on the vertical fixing plate, and the handle fixing groove includes: extend the first cell body that sets up, set up in the second cell body that a plurality of vertical direction of edge of first cell body both sides extend and the spread groove of intercommunication first cell body and second cell body along vertical direction, the handle slides and sets up in the handle fixed slot.

Through the handle fixed slot, the patient can be according to the position of height adjustment handle to a plurality of second spouts and spread groove set up the form diversified, thereby can make the handle fix in different positions, the at utmost satisfies the patient needs.

Further, in a preferred embodiment of the invention, the lower end of the seat is provided with a pulley with a brake, the bottom plate is provided with a pulley chute matched with the pulley, and the pulley is slidably arranged in the pulley chute.

The pulley spout sets up the central line department at the bottom plate, and the pulley spout extends along the direction mutually perpendicular with two vertical fixed plate line, and its length should satisfy, and the upper limbs trainer below can be adjusted to the seat, and the seat can make the patient can not fall when using the backup pad body.

The invention has the following beneficial effects:

the invention provides an orthopedic postoperative recovery training device, which comprises: the lower limb training device, the upper limbs training device and the auxiliary assembly can realize the training of different forms of the lower limbs and the upper limbs of the patient, the auxiliary assembly can provide necessary support and protection for the patient when the patient trains, the patient can better expand the training at different positions, the patient is prevented from being injured in the training process, the device is simple in overall structure and easy and convenient to operate, and the training at different positions of the patient can be realized.

Drawings

FIG. 1 is a front view of an orthopedic postoperative recovery training device of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 (seat not cut away);

FIG. 3 is a partial enlarged view B of FIG. 1;

FIG. 4 is a top view of the base plate of the present invention;

FIG. 5 is a right side view of the first drive assembly of the present invention;

fig. 6 is a right side view of the pedal of the present invention.

Wherein: 1-a scaffold; 11-a base plate; 111-a slide; 12-vertical fixing plate; 13-a first fixing bar; 14-a second fixing bar; 15-handle fixing groove; 151-a first trough body; 152-a second trough; 153-a connecting trough; 16-a pulley chute; 2-a first drive assembly; 21-a first motor; 22-a disc; 221-a bump; 23-a swing rod; 231-vertical swing link; 232-sector swing rod; 233-bump runner; 24-a drive rod; 3-a pedal; 31-a slide block; 311-a ball bearing; 32-fixing belts; 4-a support plate; 41-connecting plate; a 42-90 degree locking hinge; 43-a support plate body; 431-a baffle; 5-upper limb training component; 51-a spring cord; 52-a handle; 6-arm rest; 7-a seat; 71-a pulley; 8-a sheath; 81-pulling rope; 82-a second drive assembly; 821-a first sprocket; 822-a second sprocket; 823-drive train; 824-second motor.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Examples

Referring to fig. 1 and 2, an orthopedic post-operative recovery training device includes: the device comprises a support 1, and a lower limb training device, an upper limb training device and an auxiliary assembly which are arranged on the support 1;

referring to fig. 1, a stent 1 includes: the bottom plate 11, set up the vertical fixed plate 12 in the bottom plate 11 left and right sides, in this embodiment, vertical fixed plate 12 is not the monoblock rectangular plate, but in the position chisel vacuole that need not to install any device, refer to fig. 2, vertical fixed plate 12 is similar to "U" font of inversion, so both can save material and can guarantee the good ventilation effect of device again. The top of vertical fixed plate 12 is provided with first dead lever 13 and the second dead lever 14 that the level set up respectively, first dead lever 13 and second dead lever 14 set up between two vertical fixed plates 12, the low limbs trainer sets up the lower part at vertical fixed plate 12 front end, should set up position and human low limbs position phase-match, the upper limbs trainer sets up on first dead lever 13, first dead lever 13 sets up on the bottom of the vertical fixed plate 12 of "U" font, second dead lever 14 sets up in low limbs trainer top.

Referring to fig. 1 and 2, the lower limb training device comprises: a first driving assembly 2, and a pedal 3 and a supporting plate 4 connected with the first driving assembly 2; the first drive assembly 2 includes: through disc 22, pendulum rod 23 and the actuating lever 24 of first motor 21 driven, the quotation of disc 22 and the face parallel arrangement of vertical fixed plate 12, the fixed pivot that is equipped with in center of disc 22, this pivot passes vertical fixed plate 12 and passes through the coupling joint with the power output shaft of first motor 21 to make disc 22 rotate and set up on vertical fixed plate 12, disc 22 is kept away from and is equipped with lug 221 in the quotation at the center of disc 22, refer to fig. 2 and 4, pendulum rod 23 includes: the vertical swing rod 231 and the fan-shaped swing rod 232 are arranged at one end, close to the driving rod 24, of the vertical swing rod 231, a protruding block sliding groove 233 is arranged on the vertical swing rod 231 and extends along the length direction of the vertical swing rod, the side wall of the protruding block sliding groove 233 is in sliding contact with the protruding block 221, the protruding block 221 can only move in the protruding block sliding groove 233 along the length direction of the protruding block sliding groove 233, and the fan-shaped swing rod 232 is connected with the driving rod 24 through tooth meshing. Referring to fig. 5, the driving rod 24 is slidably disposed on the plate surface of the vertical fixing plate 12 through two U-shaped fixing rings; referring to fig. 1 and 6, the side wall of the pedal 3 is disposed on the driving rod 24, the lower surface of the pedal 3 is provided with two sliders 31, the bottom of the slider 31 is further provided with a ball 311, referring to fig. 4, the bottom plate 11 is provided with a slide rail 111 matched with the slider 31, the slider 31 is slidably disposed in the slide rail 111, so that the pedal 3 is slidably disposed on the bottom plate 11, and the pedal 3 can reciprocate along the axial direction of the driving rod 24 under the driving of the driving rod 24; the two discs 22 start at the same position but rotate in opposite directions, so that the pedals 3 move in tandem to realize a stepping motion. The upper surface of the pedal 3 is provided with a non-slip mat and two fixing straps 32. The bump 221 is provided with a support plate 4, and referring to fig. 1 and 3, the support plate 4 includes: the supporting plate body 43 is connected with the connecting plate 41 connected with the convex block 221 and the connecting plate 41 through a 90-degree locking hinge 42, two baffle plates 431 arranged left and right are further arranged on the supporting plate body 43, and the supporting plate 4 can do circular motion on a vertical plane along with the convex block 221.

Referring to fig. 1, the upper limb training assembly 5 includes: the four spring ropes 51 of vertical setting on first dead lever 13 and set up two handles 52 at four spring rope 51 lower extremes, and two handles 52 set up at vertical direction interval, and the handle 52 that is located the top can be dismantled with spring rope 51 and be connected, in this embodiment, is equipped with four links on the handle 52 of the top, sets up corresponding couple at the lower extreme of spring rope 51, and it can in the link to hang the hook.

Referring to fig. 1 and 2, the supplementary assembly includes: an armrest 6 arranged on the vertical fixing plate 12, a seat 7 arranged on the bottom plate 11 and adjustable in height, and a sheath 8 arranged on the second fixing rod 14.

The sheath 8 sets up on the second dead lever 14 through four stay cords 81, and stay cord 81 can adopt the higher wire rope of intensity, and the one end winding of stay cord 81 is on the second dead lever 14, and the other end setting of stay cord 81 is on the sheath 8, and referring to fig. 1, the one end of second dead lever 14 is equipped with second drive assembly 82, and second drive assembly 82 includes: a first chain wheel 821 arranged at one end of the second fixed rod 14, a second chain wheel 822 arranged on the vertical fixed plate 12 and a transmission chain 823 arranged between the first chain wheel 821 and the second chain wheel 822, wherein a second motor 824 is arranged on the second chain wheel 822.

Referring to fig. 2, a handle fixing groove 15 is provided on the vertical fixing plate 12, and the handle fixing groove 15 includes: extend the first cell body 151 that sets up, set up the four second cell bodies 152 that extend along vertical direction and the spread groove 153 of the first cell body 151 of intercommunication and second cell body 152 in first cell body 151 both sides, handle 52 slides and sets up in handle fixed slot 15, and in this embodiment, four second spouts are all not collinear on vertical direction and horizontal direction to accessible second vertical spout adjustment handle 52's height, different positions such as front and back.

Referring to fig. 2, a pulley 71 with a brake is disposed at the lower end of the seat 7, and referring to fig. 4, a pulley chute 16 matched with the pulley 71 is disposed on the bottom plate 11, and the pulley 71 is slidably disposed in the pulley chute 16.

The vertical fixing plate 12 is also provided with corresponding adjustment buttons and switches, which are conventional and will not be described in detail herein.

The manner of use of the device is described below in connection with fig. 1 and 2:

1. walking training: the walking training is a stepping exercise and is used for training the lower limbs of a patient, the patient stands beside the pedal 3 at first, medical staff places the sheath 8 at a proper height through the second driving assembly 82 and fixes the sheath 8 on the chest and abdomen of the patient, the upward traction strength of the sheath 8 to the patient can be selected according to the self condition of the patient, when the leg supporting strength of the patient is insufficient, the sheath 8 can be properly lifted, the upward traction force is exerted on the patient, when the patient needs to strengthen the lower limb training, the patient stands, the sheath 8 does not need to generate the upward traction force to the patient, and at the moment, the sheath 8 only serves as a protection device to avoid the patient from falling down; after the sheath 8 is fixed, the feet of the patient step on the pedals 3 at the two sides, the feet of the patient are fixed on the pedals 3 by the fixing belts 32, the first motor 21 is started, the two pedals 3 move back and forth in a reciprocating and alternating manner under the driving of the first driving assembly 2, so that the legs of the patient are driven to move back and forth in an alternating manner, and the handrails 6 at the two sides can be held by the hands of the patient to keep the body stable.

2. Training leg swing: when the muscle and the joint of the patient lying in bed for a long time can not move, the training can be carried out through the supporting plate 4 in the device. Firstly, the height and the front and back positions of the seat 7 are adjusted, so that the two legs of a patient can be placed on the supporting plate bodies 43, the patient can keep balance and comfort in the moving process of the two legs, the patient sits on the seat 7, the two legs are respectively placed on the supporting plate bodies 43 on the two sides and are positioned between the two baffles 431, the sliding of the two legs of the patient in the moving process can be avoided, the first motor 21 is started, the two disks 22 can be selected to rotate in the same direction or in different directions, the two legs of the patient can be driven by the first driving device to move up and down and left and right, the muscles and joints of the legs of the patient are extended, and the blood circulation is enhanced.

3. Upper limb training: when the patient need carry out the upper limbs training, the patient can directly stand in upper limbs training subassembly 5 below, or adjust upper limbs training subassembly 5 below with seat 7 and sit on seat 7, helps it to select suitable training intensity by medical personnel before the training begins, selects the quantity of spring rope 51 promptly, and the patient upper limbs are lifted, hold handle 52, constantly stimulate downwards, can make the upper limbs obtain the training.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. An orthopedic postoperative recovery training device, comprising: the device comprises a support (1), and a lower limb training device, an upper limb training device and an auxiliary assembly which are arranged on the support (1);

the stent (1) comprises: the lower limb training device comprises a bottom plate (11), vertical fixing plates (12) arranged on two sides of the bottom plate (11), and a first fixing rod (13) and a second fixing rod (14) which are arranged at the top ends of the vertical fixing plates (12), wherein the lower limb training device is arranged at one end, close to the bottom plate (11), of the vertical fixing plates (12), and the upper limb training device is arranged on the first fixing rod (13);

the lower limb training device comprises: a first driving assembly (2), and a pedal (3) and a support plate (4) connected with the first driving assembly (2); the first drive assembly (2) comprises: the disc (22), the swing rod (23) and the driving rod (24) are driven by a first motor (21), the disc surface of the disc (22) is parallel to the plate surface of the vertical fixing plate (12), the disc (22) is rotatably arranged on the vertical fixing plate (12), a convex block (221) is arranged on the disc surface, away from the center of the disc (22), a convex block sliding groove (233) matched with the convex block (221) is arranged on the swing rod (23), the swing rod (23) is slidably arranged on the convex block (221) through the convex block sliding groove (233), the driving rod (24) is horizontally slidably arranged on the vertical fixing plate (12), and the driving rod (24) and the swing rod are connected through tooth meshing; the side wall of the pedal (3) is arranged on the driving rod (24) and the pedal (3) is arranged on the bottom plate (11) in a sliding way; the supporting plate (4) is arranged on the lug (221);

the upper limb training assembly (5) comprises: the spring ropes (51) are vertically arranged on the first fixing rod (13), the handles (52) are arranged at the lower ends of the spring ropes (51), the handles (52) are arranged at intervals in the vertical direction, and the handle (52) at the uppermost end is detachably connected with the spring ropes (51);

the auxiliary assembly includes: the armrest (6) is arranged on the vertical fixing plate (12), the seat (7) is arranged on the bottom plate (11) and is adjustable in height, and the sheath (8) is arranged on the second fixing rod (14); the sheath (8) is arranged on the second fixing rod (14) through a plurality of pull ropes (81), one end of each pull rope (81) is wound on the second fixing rod (14), the other end of each pull rope (81) is arranged on the sheath (8), and a second driving assembly (82) is arranged at one end of each second fixing rod (14).

2. An orthopaedic post-operative recovery training device according to claim 1, wherein the rocker (23) comprises: the vertical swing rod (231) and the sector swing rod (232) are arranged at one end, close to the driving rod (24), of the vertical swing rod (231), the protruding block sliding groove (233) extends in the length direction of the vertical swing rod (231), and the sector swing rod (232) is connected with the driving rod (24) through tooth meshing.

3. The orthopaedic post-operative recovery training device of claim 1, wherein the second drive assembly (82) comprises: the chain transmission device comprises a first chain wheel (821) arranged at one end of the second fixing rod (14), a second chain wheel (822) arranged on the vertical fixing plate (12) and a transmission chain (823) arranged between the first chain wheel (821) and the second chain wheel (822), wherein a second motor (824) is arranged on the second chain wheel (822).

4. An orthopaedic post-operative rehabilitation training device according to any of claims 1-3, wherein the lower surface of the pedal (3) is provided with a plurality of sliding blocks (31), the bottom plate (11) is provided with a slideway (111) matched with the sliding blocks (31), and the sliding blocks (31) are slidably arranged in the slideway (111).

5. An orthopaedic post-operative rehabilitation training device according to claim 4, wherein the bottom of the slider (31) is further provided with a ball (311).

6. An orthopaedic post-operative recovery training device according to claim 5, wherein the upper surface of the footplate (3) is provided with a non-slip mat and a plurality of fixing straps (32).

7. An orthopaedic post-operative recovery training device according to claim 4, wherein the support plate (4) comprises: a connecting plate (41) arranged on the projection (221) and a supporting plate body (43) connected with the connecting plate (41) through a 90-degree locking hinge (42).

8. An orthopaedic post-operative rehabilitation training device according to claim 7, wherein the support plate body (43) is further provided with a baffle (431).

9. An orthopaedic post-operative rehabilitation training device according to any of claims 5-8, wherein the vertical fixing plate (12) is provided with a handle fixing groove (15), the handle fixing groove (15) comprising: extend first cell body (151) that sets up, set up along vertical direction a plurality of second cell body (152) that extend along vertical direction and intercommunication of first cell body (151) both sides first cell body (151) with spread groove (153) of second cell body (152), handle (52) slide and set up in handle fixed slot (15).

10. The orthopedics postoperative rehabilitation training device of claim 9, characterized in that the lower end of the seat (7) is provided with a pulley (71) with a brake, the bottom plate (11) is provided with a pulley chute (16) matched with the pulley (71), and the pulley (71) is slidably arranged in the pulley chute (16).

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