CN217366443U - Motion device for preventing deep venous thrombosis of lower limbs - Google Patents

Abstract

The utility model discloses a sports device for preventing deep venous thrombosis of lower limbs, which comprises a fixing mechanism, a lifting mechanism and a sports mechanism which are connected in sequence, wherein the lifting mechanism comprises a shank placing bin, a shank lifting frame is arranged in the shank placing bin, the shank lifting frame is connected with the shank placing bin through a folding support rod, a shank placing plate is arranged on the shank lifting frame, the sports mechanism comprises an ankle rotation sports component, a heel limiting component and a dorsiflexion sports component, accessible electric control subassembly and manual control subassembly carry out the motion of lifting the leg, revolve the ankle motion, stretch out on the back and bend the motion and the motion is bent to the metatarsophalangeal, and this device is rational in infrastructure, and easy operation can effectively reduce the incidence of current postoperative DVT, promotes the blood circulation and the lymph backward flow of patient's low limbs, alleviates the swelling and the pain of patient's low limbs, avoids muscular dystrophy, prevents the loss of motor function.

Description

Sport device for preventing lower limb deep vein thrombosis

Technical Field

The utility model belongs to the technical field of medical instrument, a rehabilitation equipment is related to, concretely relates to telecontrol equipment and control method of prevention low limbs deep vein thrombus.

Background

The Deep Venous Thrombosis (DVT) of the lower limb is a common clinical disease, means the coagulation of venous blood in the deep venous blood vessel of the lower limb, and is also one of the more serious complications of patients after various diseases and after long-term coma, and clinical research shows that the incidence rate of the DVT of various patients lying in bed for a long time is about 2% when the patients lie in bed for 3-7 days, and the incidence rate of the DVT is up to 28-45% when the patients lie in bed for more than 10-14 days. Once DVT occurs, patients have a very high rate of disabling lethality. DVT clinically leads to local thrombophlebitis or pain, swelling, erythema and fever, and when it enters the pulmonary arterial circulation, it leads to pulmonary embolism, which is the most dangerous complication of DVT and can lead to pulmonary infarction, heart failure and sudden death. If the prevention is not timely carried out, once DVT happens, great pain and burden are brought to patients, and even the patients are in danger of life when the DVT happens seriously.

Pneumatic pumps or ankle pump exercise and ankle pump devices are commonly used clinically for such patients to prevent the occurrence of DVT; the pneumatic pump is used for generating pressure to press blood vessels by inflating so as to promote the blood circulation and lymphatic return of lower limbs, the method has a plurality of limitations, only can stimulate the blood vessels and muscles on the surface of the leg part, can not press the blood vessels and muscles in the deep part of the leg part, and simultaneously, the comfort degree of a patient is poor; the ankle pump movement and the existing ankle pump movement device only drive the lower limbs of a patient to move through the dorsiflexion and plantar flexion of ankle joints, so that the aim of preventing deep venous thrombosis of the lower limbs is achieved, but the clinical display shows that the effect of preventing DVT by the mode is not obvious.

In view of the problems in the prior art, there is a need to provide a motion device for preventing deep venous thrombosis of lower limbs, which can be used to effectively prevent DVT formation, relieve swelling and pain of lower limbs of patients, avoid muscular atrophy and prevent loss of motion function.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a telecontrol equipment of the dark venous thrombosis of prevention low limbs can reduce current clinical DVT's incidence, and it is inconvenient to solve the operation, and the structure is unreasonable, the high technical problem of patient's discomfort.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a motion device for preventing deep venous thrombosis of lower limbs comprises a fixing mechanism, wherein the longitudinal rear end of the fixing mechanism is connected with the longitudinal front end of a lifting mechanism, and the longitudinal rear end of the lifting mechanism is telescopically connected with the front end of a motion mechanism;

the lifting mechanism comprises a shank placing bin, the longitudinal front end of the shank placing bin is movably connected with the longitudinal rear end of the fixing mechanism, and the longitudinal rear end and the top of the shank placing bin are open; the shank place and be provided with shank lifting frame in the storehouse, shank lifting frame and shank are placed and are connected through folding lifter between the storehouse:

the shank lifting frame is provided with a shank placing plate, the longitudinal front end of the shank lifting frame is hinged with the longitudinal front end of the shank placing plate, and the longitudinal rear end of the shank lifting frame is connected with the longitudinal rear end of the shank placing plate through a vertical lifting piece;

the motion mechanism comprises an ankle rotating motion assembly, a heel limiting assembly and a dorsiflexion motion assembly, the ankle rotating motion assembly comprises a steering base, the longitudinal front end of the steering base is telescopically connected with the longitudinal rear end of the shank placing plate, the longitudinal rear end of the steering base is fixedly connected with a connecting rod, the movable end of the connecting rod is provided with a universal rotating part, and the universal rotating part is connected with the longitudinal front end of the heel limiting assembly and can rotatably and universally move relative to each other;

the heel limiting component comprises a horizontal limiting body and a vertical limiting body which are perpendicular to each other, the longitudinal rear end of the horizontal limiting body is fixedly connected with the bottom end of the vertical limiting body, a first rotating shaft is fixedly arranged at the top end of the vertical limiting body, and a back-extending plantarflexion motion component capable of rotating is mounted on the first rotating shaft.

A first telescopic screw rod is arranged above the connecting rod on the end surface of the longitudinal rear end of the steering base, and the longitudinal rear end of the first telescopic rod extends into the steering base and is connected with a first screw rod progress motor; a second telescopic screw rod is arranged on the left side of the connecting rod on the end surface of the longitudinal rear end of the steering base, and the longitudinal rear end of the second telescopic rod extends into the steering base and is connected with a second screw rod progress motor; a third telescopic screw rod is arranged below the connecting rod on the end surface of the longitudinal rear end of the steering base, and the longitudinal rear end of the third telescopic screw rod extends into the steering base and is connected with a third screw rod progress motor; the end face of the longitudinal rear end of the steering base is positioned on the right side of the connecting rod and is provided with a fourth telescopic screw rod, and the longitudinal rear end of the fourth telescopic screw rod extends into the steering base and is connected with a fourth screw rod progress motor.

The dorsum-extending plantar flexion movement assembly comprises a rear sole pedal with a bottom end vertically and rotatably mounted on a first rotating shaft, the top end of the rear sole pedal is connected with the bottom end of a front sole pedal in a telescopic mode, a second rotating shaft is fixedly arranged at the top end of the front sole pedal, and a toe pedal capable of rotating is mounted on the second rotating shaft.

The motion mechanism further comprises an electric control assembly, the electric control assembly comprises a first rotating motor arranged inside the top end of the vertical limiting body, and a transverse rotating shaft of the first rotating motor is fixedly provided with a first rotating gear; the bottom end of the rear sole pedal is fixedly connected with the top end of a first connecting plate, and the bottom end of the first connecting plate is sleeved on the first rotating shaft; the end face of the bottom end of the first connecting plate is provided with a first arc-shaped rack which is meshed with the first rotating gear, so that the dorsum-extension plantarflexion movement assembly can vertically swing by taking the first rotating shaft as an axis.

The electric control assembly also comprises a second rotating motor arranged inside the top end of the front sole pedal, and a transverse rotating shaft of the second rotating motor is fixedly provided with a second rotating gear; the bottom end of the toe pedal is fixedly connected with the top end of a second connecting plate, and the bottom end of the second connecting plate is sleeved on the second rotating shaft; and a second arc-shaped rack is arranged on the end surface of the bottom end of the second connecting plate and meshed with the second rotating gear, so that the toe pedal can vertically swing by taking the second rotating shaft as an axis.

The motion mechanism further comprises a pair of manual control assemblies, each manual control assembly comprises a pair of ankle motion pull rods, the longitudinal front ends of the ankle motion pull rods are inserted into fixed inserting holes formed in the side faces of the top ends of the rear sole pedals, and the longitudinal rear ends of the ankle motion pull rods are fixedly connected with U-shaped traction handles;

the U-shaped pulling handle comprises a transversely arranged handle, two ends of the handle are fixedly connected with a longitudinal handle bar, and the longitudinal front end of the longitudinal handle bar is fixedly connected with the longitudinal rear end of the ankle movement pull rod;

the side of vertical barre along vertically offering the sliding tray that transversely runs through, but sliding tray in sliding tray sliding connection have a sliding block, adjacent sliding block passes through horizontal barre and connects.

The manual control assembly further comprises a pair of metatarsophalangeal flexion and extension movement pull rods, the longitudinal front ends of the metatarsophalangeal flexion and extension movement pull rods are inserted into the fixing insertion holes formed in the side faces of the top ends of the toe pedals, and the longitudinal rear ends of the metatarsophalangeal flexion and extension movement pull rods are fixedly connected to the rod bodies of the transverse holding rods, so that the transverse holding rods can drive the metatarsophalangeal flexion and extension movement pull rods to move longitudinally.

The foot fixing band is arranged on the side face of the top end of the rear sole pedal and used for covering the foot surface, and a finger sleeve used for stabilizing toes is arranged on the outer side of the toe pedal.

The top surface of the shank placing plate is provided with a shank liner, and the shank liner is provided with a leg fixing strap for wrapping and fixing shanks.

The fixing mechanism comprises a base, dovetail grooves are transversely formed in the end face of the longitudinal rear end of the base, dovetail heads are respectively arranged at the longitudinal front ends of the shank containing bins, and the dovetail heads are clamped in the dovetail grooves, so that the distance between the shank containing bins can be adjusted; the bottom of the two transverse sides of the base is fixedly provided with a fixed clamping head connected with the bed board, and the top of the two transverse sides of the base is provided with a hip fixing belt.

Compared with the prior art, the utility model, the technological effect who has does:

(1) the lifting mechanism and the motion mechanism provided by the utility model can assist the patient to complete a series of actions of leg lifting motion, dorsiflexion motion, ankle rotation motion and metatarsophalangeal flexion and extension motion, and can haveEffectively simulating normal physiological motion of the lower limbs, thereby preventing deep venous thrombosis of the lower limbs; wherein, the leg-raising movement moves to muscle groups such as quadriceps femoris and gastrocnemius through the actions of hip bending and knee bending to realize the contraction and relaxation of femoral vein and large and small saphenous vein; turning ankle to move, the foot is moved to tibialis anterior muscle by using ankle joint as axis to complete the continuous actions of inversion, dorsal extension, eversion and plantar flexion,

Extensor longus, extensor digitorum longus, gastrocnemius, and third peroneal muscle to achieve contraction and relaxation of anterior tibial vein, peroneal vein, and peroneal vein; the plantar flexion and extension movements of the toes act on the dorsiflexion and plantar flexion movements of the toes by taking the metatarsophalangeal joints as axes

Extensor longus, extensor digitorum longus,

The long flexors, long digitorum longus and other muscle groups assist in achieving further contraction and relaxation of the anterior tibial vein and the peroneal vein.

(2) The utility model discloses a rational in infrastructure, easy operation can adjust according to different patients ' size, improves and lifts leg movement, the motion is bent to the dorsum extension plantarflexion, revolves ankle motion and the motion is bent to the metatarsophalangeal and stretch the completion degree and the accuracy of motion, and use comfort is high, under the stronger condition of patient's autonomic consciousness, the utility model discloses can assist the patient initiative to carry out above motion, accessible electric control subassembly or manual control subassembly are the patient and accept passively again and accomplish above motion, can effectively move to the deep muscle crowd of shank muscle crowd and shank and deep vein, and then effectively prevent postoperative DVT's formation, promote the blood circulation and the lymph backward flow of patient's low limbs, alleviate the swelling and the pain of patient's low limbs, avoid muscular atrophy, prevent the motion function and lose.

Drawings

Fig. 1 is a schematic diagram of the movement of the dorsiflexion and plantar flexion, taking the right foot as an example, wherein the arrow direction is the movement direction of the foot, fig. 1(a) is the right view of the foot and the ankle joint neutral position, fig. 1(b) is plantar flexion, and fig. 1(c) is dorsiflexion.

Fig. 2 is a schematic diagram of the inversion and eversion of the foot, which takes the right foot as an example, the arrow direction in the figure is the moving direction of the foot, fig. 2(a) is the upright position of the ankle joint of the foot, fig. 2(b) is inversion, and fig. 2(c) is eversion.

Fig. 3 is an exploded view of ankle rotation, which is taken by the right foot as an example, the arrow direction in the figure is the direction of foot movement and the movement sequence, fig. 3(a) is the right view of the foot with the ankle joint in neutral position, fig. 3(b) is dorsal extension, fig. 3(c) is inversion, fig. 3(d) is plantar flexion, and fig. 3(e) is eversion.

Fig. 4 is a schematic diagram showing the flexion and extension of the metatarsophalangeal region of the right foot, with the direction of the arrow shown as the direction of movement of the toes, fig. 4(a) showing the right-looking ankle neutral position of the foot, fig. 4(b) showing the dorsiflexion of the metatarsophalangeal region, and fig. 4(c) showing the plantarflexion of the metatarsophalangeal region.

Fig. 5 is a schematic view of the overall structure of the present invention.

Fig. 6 is a schematic side sectional view of the overall structure of the present invention.

Fig. 7 is a schematic side-sectional view of the lifting mechanism in a lifted state.

Fig. 8 is a schematic side sectional view of the raised state of the calf placing plate of the present invention.

Fig. 9 is a schematic side sectional view of the movement mechanism of the present invention.

Figure 10 is a left side view of the ankle rotation exercising assembly of the present invention.

Fig. 11 is a schematic side sectional view of the whole structure of the manual control assembly of the present invention.

Fig. 12 is a schematic view of the whole structure of the manual control assembly of the present invention.

The meaning of the individual reference symbols in the figures is:

1. the device comprises a fixing mechanism 2, a lifting mechanism 3, a moving mechanism 4, a fixing jack 5 and a telescopic rod;

11. the fixing device comprises a base 12, a dovetail groove 13, a fixing chuck 14 and a hip fixing belt;

21. a shank placing bin 22, a shank lifting frame 23, a shank placing plate 24, a folding supporting rod 25, a hinge 26, a vertical lifting piece 27, a dovetail head 28 and a hydraulic control button;

231. a shank liner 232, a leg securing strap;

31. a heel stop element, 32, a dorsiflexion motion element, 33, a motorized control element, 34, a manual control element, 35, an ankle rotation motion element;

311. a horizontal limiting body 312, a vertical limiting body 313, a first rotating shaft,

321. a rear sole pedal 322, a front sole pedal 323, a toe pedal 324, a second rotating shaft 325, a first connecting plate 326, a first arc-shaped rack 327, a second connecting plate 328, a second arc-shaped rack 329, a foot fixing belt 3210 and a finger sleeve;

331. a first rotating motor 332, a first rotating gear 333, a second rotating motor 334, a second rotating gear 335, and a remote control switch;

341. ankle sport pull rod 342, U-shaped pulling handle 343, metatarsophalangeal flexion and extension sport pull rod;

3421. handle, 3422, longitudinal handle bar, 3423, sliding groove, 3424, sliding block, 3425, transverse handle bar;

351. the steering base, 352, a connecting rod, 353, a universal rotating piece, 354, a first telescopic screw rod, 355, a first screw rod progress motor, 356, a second telescopic screw rod, 357, a second screw rod progress motor, 358, a third telescopic screw rod, 359, a third screw rod progress motor, 3510, a fourth telescopic rod, 3511, a fourth screw rod progress motor, 3512, a steering control switch, 3513 and a locking knob.

The following examples are provided to explain the present invention in further detail.

Detailed Description

Obey above-mentioned technical scheme, below provide the utility model discloses a specific embodiment, it is that the utility model discloses do not confine following specific embodiment to, all equal transform of doing on this application technical scheme basis all falls into the protection scope of the utility model.

In the present invention, when no description is made on the contrary, the use of the directional terms such as "upper", "lower", "left", "right", etc. generally means that the terms are defined with reference to the drawing in the corresponding drawings, "inner", "outer" means the inner and outer of the outline of the corresponding component, "longitudinal", "transverse", "vertical" means the direction of the mark in the drawings.

As shown in fig. 1 to 4, the "ankle joint neutral position" means that when the human body is in the supine position, the lower leg is perpendicular to the foot, and the foot is vertically forward; "plantar flexion" is the movement of the foot away from the front of the tibia and is defined as the plantar flexion movement of the ankle joint; "dorsal extension" is the movement of the foot towards the front of the tibia and is defined as the dorsal extension movement of the ankle joint; the inward turning is that the toe of the foot drives the foot to rotate in the axial direction by taking the ankle joint as the axis; the eversion is that the toe of the foot drives the foot to rotate outwards by taking the ankle joint as the axial direction; "ankle rotation movement" means a coherent movement of dorsiflexion, inversion, plantarflexion and eversion in sequence with the ankle joint as the shaft and foot; "plantar flexion and extension movement" means that the toes perform dorsal and plantar flexion movements about the metatarsophalangeal joint; "plantar-dorsal extension" refers to the movement of the toes extending toward the dorsum of the foot, and "plantar-plantar flexion" refers to the movement of the toes flexing toward the center of the foot.

Example (b):

the embodiment provides a movement device for preventing deep venous thrombosis of lower limbs, which comprises a fixing mechanism 1, wherein the longitudinal rear end of the fixing mechanism 1 is connected with the longitudinal front end of a lifting mechanism 2, and the longitudinal rear end of the lifting mechanism 2 is telescopically connected with the front end of a movement mechanism 3;

the lifting mechanism 2 comprises a lower leg placing bin 21, the longitudinal front end of the lower leg placing bin 21 is movably connected with the longitudinal rear end of the fixing mechanism 1, and the longitudinal rear end and the top of the lower leg placing bin 21 are open; the shank is placed and is provided with shank lifting frame 22 in the storehouse 21, and shank lifting frame 22 is placed the storehouse 21 with the shank and is connected through folding lifter 24 between the storehouse:

a lower leg placing plate 23 is arranged on the lower leg lifting frame 22, the longitudinal front end of the lower leg lifting frame 22 is hinged with the longitudinal front end of the lower leg placing plate 23, and the longitudinal rear end of the lower leg lifting frame 22 is connected with the longitudinal rear end of the lower leg placing plate 23 through a vertical lifting piece 26;

the motion mechanism 3 comprises an ankle rotation motion assembly 35, a heel limiting assembly 31 and a dorsiflexion motion assembly 32, wherein the ankle rotation motion assembly 35 comprises a turning base 351, the longitudinal front end of the turning base 351 is telescopically connected with the longitudinal rear end of the lower leg placing plate 23, the longitudinal rear end of the turning base 351 is fixedly connected with a connecting rod 352, the movable end of the connecting rod 352 is provided with a universal rotating piece 353, and the universal rotating piece 353 is connected with the longitudinal front end of the heel limiting assembly 31 and can rotationally and universally move relative to each other;

the heel limiting component 31 comprises a horizontal limiting body 311 and a vertical limiting body 312 which are perpendicular to each other, the longitudinal rear end of the horizontal limiting body 311 is fixedly connected with the bottom end of the vertical limiting body 312, the top end of the vertical limiting body 312 is fixedly provided with a first rotating shaft 313, and the first rotating shaft 313 is provided with a back-extending plantarflexion motion component 32 which can rotate.

In this embodiment, the fixing mechanism 1 is mainly used to mount the whole device on a hospital bed; the lifting mechanism 2 and the moving mechanism 3 can be connected by a telescopic rod 5, so that the relative positions of the lifting mechanism and the moving mechanism can be longitudinally and telescopically adjusted, and the device is suitable for patients with different heights; the top of the shank placing bin 21 is open, when the device is not used, the lifting frame 22 capable of containing the shank and the shank placing plate 23 are placed in the shank placing bin, and the longitudinal rear end of the shank placing bin 21 is open, so that the subsequent operation of the whole device is not shielded conveniently; the folding lifting piece 24 is vertically arranged between the calf lifting frame 22 and the calf placing bin 21, the calf lifting frame 22 can be lifted by rubbing the two ends of the folding lifting piece 24 upwards in an axial direction, so that the calf is stably lifted without drawing, the longitudinal front end of the calf lifting frame 22 and the longitudinal front end of the calf placing plate 23 can be connected in a hinge mode through a hinge 25, the calf placing plate 23 is lifted upwards by the vertical lifting piece 26 by taking the hinge 25 as an axis, so that the calf and a horizontal plane form a certain angle, when the leg lifting device is used, the leg of a patient can simulate leg lifting action, the movable knee joint and hip joint are promoted, muscle groups such as quadriceps and gastrocnemius are driven, the blood circulation of thigh muscle groups is accelerated, the calf blood circulation is promoted, the blood volume of a lower limb pump is increased, and DVT is prevented; the ankle rotation motion assembly 35 is connected with the heel limiting assembly 31 through the universal rotating piece 353, so that the heel limiting assembly 31 can rotate around the universal rotating piece 353, the ankle rotation motion of the foot of the patient is promoted by taking an ankle joint as a center, and the blood reflux speed of the lower limb is increased; the heel limiting component 31 is composed of a horizontal limiting body 311 and a vertical limiting body 312 which are perpendicular to each other, the upper surface of the horizontal limiting body 311 can be set to be a curvature which is attached to the radian of the heel, and after the patient is in the supine position, the foot of the patient can be placed at a position perpendicular to the tibia (namely, the ankle joint neutral position) under the condition that the comfortable and stable foot is ensured; a first rotating shaft 313 is fixedly arranged at the top end of the vertical limiting body 312, a rotatable dorsiflexion and extension motion assembly 32 is arranged on the first rotating shaft 313, and the dorsiflexion and extension motion assembly 32 can drive the foot to do dorsiflexion and extension motion by taking the first rotating shaft 313 as an axis.

Further, a locking knob 3513 for fixing the universal rotating piece 353 is arranged on the heel limiting component 31, and when ankle rotation movement is not performed, the universal rotating piece 353 is fixed by the locking knob 3513, so that the heel limiting component 31 and the lower leg placing plate 23 are kept horizontal.

As a preferable scheme of the present embodiment, as shown in fig. 9 to fig. 10, a first telescopic screw rod 354 is disposed above the connecting rod 352 on the end surface of the longitudinal rear end of the steering base 351, and a first screw rod stepping motor 355 is connected to the longitudinal rear end of the first telescopic screw rod 354 extending into the steering base 351; a second telescopic screw rod 356 is arranged on the left side of the connecting rod 352 on the end surface of the longitudinal rear end of the steering base 351, and the longitudinal rear end of the second telescopic screw rod 356 extends into the steering base 351 and is connected with a second screw rod progress motor 357; a third telescopic screw rod 358 is arranged on the end surface of the longitudinal rear end of the steering base 351 and below the connecting rod 352, and a third screw rod progressing motor 359 is connected with the longitudinal rear end of the third telescopic screw rod 358 extending into the steering base 351; a fourth telescopic screw rod 3510 is arranged on the right side of the connecting rod 352 on the end surface of the longitudinal rear end of the steering base 351, and a fourth screw rod progressing motor 3511 is connected to the inner part of the steering base 351, wherein the longitudinal rear end of the fourth telescopic screw rod 3510 extends into the steering base 351.

First telescopic screw 354, the telescopic screw 356 of second, the telescopic screw 358 of third and fourth telescopic screw 3510 are under the drive of lead screw step motor, according to clockwise or anticlockwise in proper order the terminal surface of the vertical front end of the spacing subassembly 31 of heel applys external force, make the spacing subassembly 31 of heel drive the patient foot and use the ankle joint to carry out the ankle motion soon as the axle, only one telescopic screw applys external force to the spacing subassembly 31 of heel when the operation, all the other three telescopic screw are in the shrink state, avoid disturbing the smooth and easy going on of ankle motion soon.

When the first telescopic screw rod 354 applies external force to the upper part of the end face of the longitudinal front end of the heel limiting component 31, the heel limiting component 31 is turned downwards by taking the universal rotating piece 353 as an axial direction, so that the foot is in a state of pressing the instep downwards, and plantarflexion movement is performed, and the movement can stimulate the long peroneal muscle, the short peroneal muscle, the gastrocnemius muscle and the soleus muscle in the calf muscle group, so as to press the posterior tibial vein and promote the blood backflow of the posterior tibial vein; when the second telescopic screw rod 356 applies an external force to the right side of the end face of the longitudinal front end of the heel limiting component 31, the heel limiting component 31 drives the foot to turn inwards by taking the universal rotating member 353 as an axis, so that the toe of the foot performs inward turning movement, and the movement can stimulate tibialis anterior muscles and flexors digitorum longus in the calf muscle group to press the tibialis anterior veins; when the third telescopic screw 358 applies external force to the lower part of the end face of the longitudinal front end of the heel limiting component 31, the heel limiting component 31 is turned upwards by taking the universal rotating piece 353 as an axis, so that the foot is in a state of hooking on the instep to carry out dorsal extension movement, and the movement can stimulate tibialis anterior in the calf muscle group; when the fourth telescopic screw rod 3510 applies an external force to the left part of the end face of the longitudinal front end of the heel limiting component 31, the heel limiting component 31 is enabled to rotate outwards by taking the universal rotating piece 353 as an axial direction, so that the toe of the foot performs outward eversion movement, and the action stimulates extensor digitorum longus and the third fibula muscle in the calf muscle group.

In the embodiment, the neutral position of the ankle joint is taken as a reference, the plantar flexion angle ranges from 15 degrees to 50 degrees, the inversion angle ranges from 10 degrees to 20 degrees, the dorsal extension angle ranges from 10 degrees to 30 degrees, and the eversion angle ranges from 7 degrees to 10 degrees.

As a preferable scheme of this embodiment, the dorsum-extension plantarflexion motion assembly 32 includes a rear sole pedal 321 whose bottom end is vertically and rotatably mounted on the first rotating shaft 313, the top end of the rear sole pedal 321 is telescopically connected with the bottom end of the front sole pedal 322, and for feet with different sizes, the vertical relative position between the front sole pedal 322 and the rear sole pedal 321 can be adjusted by mounting the telescopic rod 5, so that the dorsum-extension plantarflexion motion assembly 32 fits the feet; the second rotating shaft 324 is fixedly arranged at the top end of the front sole pedal 322, the rotatable toe pedal 323 is arranged on the second rotating shaft 324, and the structure can lead the toes of the patient to do metatarsophalangeal flexion and extension movement by taking the second rotating shaft 324 as the axis under the driving of the toe pedal 323.

As a preferable scheme of this embodiment, the motion mechanism 3 further includes an electric control component 33, in case of coma or poor initiative of the patient, the medical staff or the accompanying staff can prompt the patient to perform passive dorsiflexion and plantarflexion motions through the electric control component 33, the electric control component 33 includes a first rotating motor 331 disposed inside the top end of the vertical limiting body 312, and a first rotating gear 332 is fixedly mounted on a transverse rotating shaft of the first rotating motor 331; the bottom end of the rear sole pedal 321 is fixedly connected with the top end of a first connecting plate 325, and the bottom end of the first connecting plate 325 is sleeved on the first rotating shaft 313; the first arc-shaped rack 326 is installed on the end face of the bottom end of the first connection plate 325, the first arc-shaped rack 326 is meshed with the first rotation gear 332, the first rotation motor 331 drives the first rotation gear 332 to reciprocate, so that the dorsiflexion motion assembly 32 vertically swings around the first rotation shaft 313 as the axis under the action of the first arc-shaped rack 326 and the first rotation gear 332, the foot is driven to do dorsiflexion motion and plantarflexion motion, corresponding muscles in the calf muscle group are stimulated, veins in the muscle group are pressed, and blood backflow is promoted.

Further, the electric control assembly 33 further includes a second rotating motor 333 disposed inside the top end of the front sole pedal 322, and a second rotating gear 334 is fixedly mounted on a transverse rotating shaft of the second rotating motor 333; the bottom end of the toe pedal 323 is fixedly connected with the top end of a second connecting plate 327, and the bottom end of the second connecting plate 327 is sleeved on the second rotating shaft 324; the second arc-shaped rack 328 is mounted on the end surface of the bottom end of the second connecting plate 327, the second arc-shaped rack 328 is engaged with the second rotating gear 334, and the second rotating motor 333 can drive the second rotating gear 334 to reciprocate, so that the toe pedal 323 can vertically swing around the second rotating shaft 324 as the axis under the action of the second arc-shaped rack 328 and the second rotating gear 334, and the toe tip of the foot is driven to perform the metatarsophalangeal flexion-extension movement.

When the toe pedal 323 moves toward the front of the tibia with the second rotation shaft 324 as the axis, it is a metatarsophalangeal dorsal extension movement that stimulates the calf muscle group

Extensor longus muscle; when the toe pedal 323 moves away from the anterior tibia with the second rotation axis 324 as the axis, it is the plantar flexion of the metatarsophalangeal, which stimulates the calf muscle group

The flexor longus, the flexor digitorum longus and the flexor hallucis longus act on pressing the posterior tibial vein and the peroneal vein of the lower leg to promote the blood backflow of the posterior tibial vein and the peroneal vein. In this embodiment, the range of the angle of dorsal extension of the metatarsophalangeal is 10 ° to 35 ° and the range of the angle of plantar flexion of the metatarsophalangeal is 20 ° to 60 °, based on the neutral position of the ankle joint.

As a preferable scheme of this embodiment, as shown in fig. 11 to 12, the movement mechanism 3 further includes a pair of manual control assemblies 34, and when the patient is conscious, the manual control assemblies 34 can perform ankle rotation movement and dorsiflexion movement, the manual control assemblies 34 include a pair of ankle movement pulling rods 341, the longitudinal front ends of the ankle movement pulling rods 341 are inserted into the fixing insertion holes 4 provided at both sides of the top end of the rear sole pedal 321, and the longitudinal rear ends of the ankle movement pulling rods 341 are fixedly connected with U-shaped pulling handles 342;

further, the U-shaped pulling handle 342 includes a transversely disposed handle 3421, two ends of the handle 3421 are fixedly connected with a longitudinal handle bar 3422, and a longitudinal front end of the longitudinal handle bar 3422 is fixedly connected with a longitudinal rear end of the ankle moving pull rod 341;

further, a sliding groove 3423 is formed in the side of the longitudinal bar 3422 along the longitudinal direction, and a sliding block 3424 is slidably connected in the sliding groove 3423, and the adjacent sliding blocks 3424 are connected by the transverse bar 3425, so that the patient can push and pull the U-shaped pulling handle 342, and the dorsiflexion and plantarflexion movement assembly 32 is driven by the ankle movement pull rod 341 to reciprocate, thereby performing the dorsiflexion and plantarflexion movement autonomously.

As a preferable scheme of this embodiment, the manual control assembly 34 further includes a pair of metatarsophalangeal flexion-extension movement rods 343, a longitudinal front end of each metatarsophalangeal flexion-extension movement rod 343 is inserted into the fixing insertion holes 4 disposed on both sides of the top end of the toe pedal 323, and a longitudinal rear end of each metatarsophalangeal flexion-extension movement rod 343 is fixedly connected to the rod body of the transverse bar 3425, so that when the patient uses the device, the patient pulls the transverse bar 3425 to reciprocate in the sliding groove 3423, and further drives the metatarsophalangeal flexion-extension movement rod 343 to move longitudinally, so as to perform autonomous metatarsophalangeal flexion-extension movement.

As a preferable scheme of this embodiment, the ankle moving rod 341 has a step structure, so that it is more convenient to be not shielded by other components in actual operation.

Further, a foot fixing band 329 for covering the foot surface is arranged on the side surface of the top end of the rear sole pedal 321, so that the foot is tightly attached to the dorsiflexion and plantar flexion movement component 32, and a finger sleeve 3210 for covering the toes is arranged on the outer side of the toe pedal 323, so that the toes are tightly attached to the toe pedal 323; to ensure comfort, padding may be applied to the surfaces of the heel stop assembly 31, the rear ball pedal 321, the front ball pedal 322, and the toe pedal 323.

Further, a calf pad 231 is arranged on the top surface of the calf placing plate 23, the calf pad 231 fits with the calf cambered surface, so that the legs can be placed more comfortably, and a leg fixing strap 232 used for wrapping and fixing the calves is arranged on the calf pad 231.

Further, the fixing mechanism 1 comprises a base 11, a dovetail groove 12 is transversely formed in the end face of the longitudinal rear end of the base 11, dovetail heads 27 are respectively arranged at the longitudinal front ends of the lower leg placing bins 21, and the dovetail heads 27 are clamped in the dovetail grooves 12, so that the distance between the pair of lower leg placing bins 21 can be adjusted; in order to ensure the stability of the fixing mechanism 1, the bottom parts of the two transverse sides of the base 11 are fixedly provided with fixing chucks 13 connected with the bed board, the top parts of the two transverse sides of the base 11 are provided with hip fixing belts 14 which can wrap the hip part to ensure the stability of the hip part of the patient, and similarly, in order to ensure the comfort level, a soft cushion can be laid on the upper surface of the base 11.

The specific use process of the exercise device for preventing deep venous thrombosis of the lower limb of the embodiment is as follows:

the first step, early preparation work:

firstly, the whole device is placed on a bed, a fixing mechanism 1 is positioned at the upper limbs and the thighs of a patient, a fixing clamping head 13 is screwed, the fixing mechanism 1 is stably connected with a bed board at the moment, the patient lies flat and is in the whole device, the calves are placed on a lifting mechanism 2, the feet are placed on a motion mechanism 3, the distance between a pair of calves placing bins 21 is adjusted according to the body size of the patient, the heels are further attached to a horizontal limiting body 311, the distance between the horizontal limiting body 311 and the calves placing plate 23 is adjusted, the length of the device and the leg of the patient are suitable and comfortable to place, the calves are wrapped by a leg fixing belt 232, the calves cannot move freely, the distance between a front sole pedal 322 and a rear sole pedal 321 is adjusted, the size of a back stretching and plantar flexion motion assembly 32 is matched with the size of the feet of the patient, the toes are stretched into a finger sleeve 3210, the feet are fixed with the motion mechanism 3 by a foot fixing belt 329, after the patient keeps a comfortable and stable posture on the whole device, the hip fixing belt 14 is wrapped outside the hip of the patient, so that the upper limbs of the patient can not swing randomly, and the early-stage preparation is completed.

Step two, lower limb movement:

leg lifting movement: the whole shank lifting frame 22 is horizontally lifted upwards through the folding lifting piece 24, so that the folding lifting piece 24 is in a vertical state, and in order to match the adaptation degrees of different patients, the folding lifting piece 24 can also be set to be of a telescopic structure, so that the height of the shank lifting frame 22 is adjusted; the vertical lifting piece 26 is started by pressing the hydraulic control button 28, so that the lower leg placing plate 23 is lifted or dropped by taking the hinge 25 as an axis, and a certain angle is formed between the lower leg placing plate 23 and the lower leg lifting frame 22, wherein the angle is set to be 30 degrees in the embodiment; during specific operation, the pair of shank placing plates 23 are driven by the vertical lifting piece 26 to alternately lift and fall to perform leg lifting movement, and a set of complete leg lifting movement needs to be completed within 5-10 seconds; and after the leg lifting movement is finished, the lifting mechanism 2 is restored to the initial state.

(II) dorsal extension and plantar flexion movement: the first rotating motor 331 is started through the remote control switch 335, the rotating shaft of the motor is set to be capable of reciprocating only in the transverse direction, under the action of the motor, the dorsiflexion and plantar flexion motion assembly 32 can swing back and forth vertically by taking the first rotating shaft 313 as the axis, the foot of the patient is driven to do dorsiflexion and plantar flexion motion, when the first rotating gear 332 rotates towards the tibia, the dorsiflexion and plantar flexion motion assembly 32 moves away from the front of the tibia and does plantar flexion motion, the plantar flexion angle range is controlled to be between 15 degrees and 50 degrees according to the tolerance degree of the patient, the pause is 2 to 3 seconds, the first rotating gear 332 rotates towards the direction away from the tibia again, the dorsiflexion and plantar flexion motion assembly 32 is driven to move towards the front of the tibia and does dorsiflexion motion, the dorsiflexion angle range is controlled to be between 10 degrees and 30 degrees according to the tolerance degree of the patient, the pause is 2 to 3 seconds, the first rotating gear 332 rotates towards the tibia again, and repeatedly performs the dorsiflexion and the motion, the one-time complete dorsiflexion and plantarflexion movement is controlled to be completed within 10-12 seconds, 5-6 times per minute, and 2-3 minutes are taken as a group, so that the patient does not feel tired. After completion of the dorsiflexion and plantarflexion motions, the dorsiflexion and plantarflexion motion assembly 32 is returned to the original position.

(III) ankle rotation movement: the first lead screw progressing motor 355 is started through the steering control switch 3512, the first lead screw progressing motor 355 drives the first telescopic lead screw 354 to extend forwards, external force is applied to the upper part of the end face of the longitudinal front end of the heel limiting component 31, the heel limiting component 31 is enabled to turn downwards by taking the universal rotating piece 353 as an axial direction to do plantarflexion movement, the plantarflexion turning angle is controlled to be 15-50 degrees according to the tolerance degree of a patient and stops for 1-2 seconds, then the first telescopic lead screw 354 is recovered to the initial position, meanwhile, the second telescopic lead screw 356 extends forwards, external force is applied to the right side of the end face of the longitudinal front end of the heel limiting component 31, the foot part of the heel limiting component 31 is driven to turn inwards by taking the universal rotating piece 353 as an axial direction to do the inwards turning movement, the inwards turning angle is controlled to be 10-20 degrees and stops for 1-2 seconds according to the tolerance degree of the patient, then the second telescopic lead screw 356 is recovered to the initial position, meanwhile, the third telescopic screw rod 358 extends forwards to apply external force to the lower part of the end face of the longitudinal front end of the heel limiting assembly 31, so that the heel limiting assembly 31 turns upwards by taking the universal rotating piece 353 as an axial direction to do back extension movement, the back extension turning angle is controlled to be between 10 and 30 degrees according to the tolerance degree of a patient, the pause is 1 to 2 seconds, then the third telescopic screw rod 358 is recovered to the initial position, meanwhile, the fourth telescopic screw rod 3510 extends forwards, external force is applied to the left part of the end face of the longitudinal front end of the heel limiting assembly 31, so that the heel limiting assembly 31 turns outwards by taking the universal rotating piece 353 as an axial direction to do outward turning movement, the outward turning angle is controlled to be between 7 and 10 degrees according to the tolerance degree of the patient, the pause is 1 to 2 seconds, then the fourth telescopic screw rod 3510 is recovered to the initial position, meanwhile, the first telescopic screw rod 354 extends forwards, external force is applied to the upper part of the end face of the longitudinal front end of the heel limiting assembly 31, and continuing to perform plantarflexion movement, repeating the above actions repeatedly, and performing ankle rotation movement, wherein one complete ankle rotation movement is completed within 8-10 seconds, and is performed 6-7 times per minute for 2-3 minutes, and preferably, the patient does not feel tired. After the ankle rotation motion is completed, the heel stop assembly 31 is returned to the initial position and the universal swivel 353 is secured in place by the locking knob 3513.

(IV) plantar flexion and extension movement: the second rotating motor 333 is started through the remote control switch 335, the rotating shaft of the motor is also set to be capable of reciprocating only in the transverse direction, under the action of the motor, the toe pedal 323 can vertically swing in a reciprocating manner by taking the second rotating shaft 324 as the axis to drive the toes of the patient to do metatarsophalangeal flexion and extension movement, when the second rotating gear 334 rotates towards the tibia, the toe pedal 323 moves away from the front of the tibia to do metatarsophalangeal flexion and extension movement, according to the tolerance degree of the patient, the metatarsophalangeal flexion angle range is controlled to be between 20 degrees and 60 degrees, and stops for 1 to 2 seconds, the second rotating gear 334 rotates towards the direction away from the tibia again to drive the toe pedal 323 to move towards the front of the tibia to do metatarsophalangeal extension movement, according to the tolerance degree of the patient, the metatarsophalangeal extension angle range is controlled to be between 10 degrees and 35 degrees, and stops for 1 to 2 seconds, the second rotating gear 334 rotates towards the tibia again to repeatedly do metatarsophalangeal flexion and extension movement, one complete metatarsophalangeal flexion and extension movement is controlled to be completed within 3-5 seconds, 12-20 times per minute and 1-2 minutes are taken as a group, and the patient does not feel tired. After the flexion and extension of the metatarsophalangeal, the toe pedal 323 is returned to the initial position.

Thirdly, the auxiliary device moves:

for the patient with strong self-consciousness, the manual control component 34 of the device can assist the dorsal extension and plantar flexion and extension movements, and the operation is as follows: the longitudinal front ends of the ankle movement pull rod 341 and the metatarsophalangeal flexion and extension movement pull rod 343 are respectively inserted into the fixed insertion holes 4 positioned at the two sides of the top end of the rear sole pedal 321 and the two sides of the top end of the toe pedal 323, and then the U-shaped traction handle 342 is pulled to drive the dorsiflexion and plantarflexion movement assembly 32 to assist the patient to carry out dorsiflexion and plantarflexion movement under the traction action of the ankle movement pull rod 341; then, the metatarsophalangeal flexion and extension movement is performed, the transverse handle bar 3425 is pulled to reciprocate in the sliding groove 3423, the metatarsophalangeal flexion and extension movement pull rod 343 is driven to move longitudinally, and the toe pedal 323 is driven under the pulling action of the metatarsophalangeal flexion and extension movement pull rod 343 to assist the patient in the metatarsophalangeal flexion and extension movement.

After the whole operation is finished, the positions of all the components are returned to the initial state to be ready for the next use.

Claims (10)

1. The movement device for preventing the deep venous thrombosis of the lower limbs is characterized by comprising a fixing mechanism (1), wherein the longitudinal rear end of the fixing mechanism (1) is connected with the longitudinal front end of a lifting mechanism (2), and the longitudinal rear end of the lifting mechanism (2) is in telescopic connection with the front end of a movement mechanism (3);

the lifting mechanism (2) comprises a lower leg placing bin (21), the longitudinal front end of the lower leg placing bin (21) is movably connected with the longitudinal rear end of the fixing mechanism (1), and the longitudinal rear end and the top of the lower leg placing bin (21) are opened; the shank place and be provided with shank lifting frame (22) in storehouse (21), shank lifting frame (22) and shank are placed and are connected through folding lifter (24) between storehouse (21):

a lower leg placing plate (23) is arranged on the lower leg lifting frame (22), the longitudinal front end of the lower leg lifting frame (22) is hinged with the longitudinal front end of the lower leg placing plate (23), and the longitudinal rear end of the lower leg lifting frame (22) is connected with the longitudinal rear end of the lower leg placing plate (23) through a vertical lifting piece (26);

the motion mechanism (3) comprises an ankle rotation motion assembly (35), a heel limiting assembly (31) and a dorsiflexion motion assembly (32), wherein the ankle rotation motion assembly (35) comprises a turning base (351), the longitudinal front end of the turning base (351) is in telescopic connection with the longitudinal rear end of the calf placing plate (23), the longitudinal rear end of the turning base (351) is fixedly connected with a connecting rod (352), a universal rotating piece (353) is installed at the movable end of the connecting rod (352), and the universal rotating piece (353) is connected with the longitudinal front end of the heel limiting assembly (31) and can rotationally and universally move relative to each other;

the heel limiting component (31) comprises a horizontal limiting body (311) and a vertical limiting body (312) which are perpendicular to each other, the longitudinal rear end of the horizontal limiting body (311) is fixedly connected with the bottom end of the vertical limiting body (312), a first rotating shaft (313) is fixedly arranged at the top end of the vertical limiting body (312), and a back-extending and plantarflexion motion component (32) capable of rotating is mounted on the first rotating shaft (313).

2. The exercise device for preventing deep venous thrombosis of the lower limbs according to claim 1, wherein a first telescopic screw rod (354) is arranged on the end surface of the longitudinal rear end of the steering base (351) above the connecting rod (352), and a first screw rod progressing motor (355) is connected with the longitudinal rear end of the first telescopic screw rod (354) extending into the steering base (351); a second telescopic screw rod (356) is arranged on the left side of the connecting rod (352) on the end surface of the longitudinal rear end of the steering base (351), and the longitudinal rear end of the second telescopic screw rod (356) extends into the steering base (351) and is connected with a second screw rod progress motor (357); a third telescopic screw rod (358) is arranged on the end surface of the longitudinal rear end of the steering base (351) and below the connecting rod (352), and the longitudinal rear end of the third telescopic screw rod (358) extends into the steering base (351) and is connected with a third screw rod progress motor (359); the end face of the longitudinal rear end of the steering base (351) is positioned on the right side of the connecting rod (352) and is provided with a fourth telescopic screw rod (3510), and the longitudinal rear end of the fourth telescopic screw rod (3510) extends into the steering base (351) and is connected with a fourth screw rod stepping motor (3511).

3. The lower limb deep vein thrombosis preventing exercise device according to claim 1, wherein the dorsiflexion and plantar flexion movement assembly (32) comprises a rear sole pedal (321) with a bottom end vertically and rotatably mounted on a first rotating shaft (313), the top end of the rear sole pedal (321) is telescopically connected with the bottom end of a front sole pedal (322), a second rotating shaft (324) is fixedly arranged at the top end of the front sole pedal (322), and a rotatable toe pedal (323) is mounted on the second rotating shaft (324).

4. The lower limb deep vein thrombosis preventing exercise device according to claim 3, wherein the exercise mechanism (3) further comprises an electric control component (33), the electric control component (33) comprises a first rotating motor (331) arranged inside the top end of the vertical limiting body (312), and a first rotating gear (332) is fixedly arranged on a transverse rotating shaft of the first rotating motor (331); the bottom end of the rear sole pedal (321) is fixedly connected with the top end of a first connecting plate (325), and the bottom end of the first connecting plate (325) is sleeved on the first rotating shaft (313); a first arc-shaped rack (326) is arranged on the end face of the bottom end of the first connecting plate (325), and the first arc-shaped rack (326) is meshed with a first rotating gear (332), so that the dorsum-extension plantarflexion movement assembly (32) can vertically swing by taking the first rotating shaft (313) as an axis.

5. The lower limb deep vein thrombosis preventing exercise device according to claim 4, wherein the electric control assembly (33) further comprises a second rotating motor (333) arranged inside the top end of the forefoot pedal (322), and a second rotating gear (334) is fixedly arranged on a transverse rotating shaft of the second rotating motor (333); the bottom end of the toe pedal (323) is fixedly connected with the top end of a second connecting plate (327), and the bottom end of the second connecting plate (327) is sleeved on the second rotating shaft (324); and a second arc-shaped rack (328) is arranged on the end surface of the bottom end of the second connecting plate (327), and the second arc-shaped rack (328) is meshed with a second rotating gear (334) so that the toe pedal (323) can vertically swing by taking the second rotating shaft (324) as an axis.

6. The exercise device for preventing deep venous thrombosis of lower limbs according to claim 3, wherein said exercise mechanism (3) further comprises a pair of manual control members (34), said manual control members (34) comprise a pair of ankle exercise pull rods (341), the longitudinal front ends of the ankle exercise pull rods (341) are inserted into the fixing insertion holes (4) formed in the side surfaces of the top ends of said rear sole pedals (321), and the longitudinal rear ends of the ankle exercise pull rods (341) are fixedly connected with U-shaped pulling handles (342);

the U-shaped pulling handle (342) comprises a transversely arranged handle (3421), both ends of the handle (3421) are fixedly connected with a longitudinal handle bar (3422), and the longitudinal front end of the longitudinal handle bar (3422) is fixedly connected with the longitudinal rear end of the ankle moving pull rod (341);

the lateral surface of the longitudinal bar (3422) is provided with a sliding groove (3423) which transversely penetrates along the longitudinal direction, a sliding block (3424) is connected in the sliding groove (3423) in a sliding manner, and the adjacent sliding blocks (3424) are connected through the transverse bar (3425).

7. The device for preventing deep venous thrombosis of the lower limbs according to claim 6, wherein the manual control assembly (34) further comprises a pair of metatarsophalangeal flexion-extension pull rods (343), the front longitudinal ends of the metatarsophalangeal flexion-extension pull rods (343) are inserted into the fixed insertion holes (4) formed in the side surfaces of the top ends of the toe pedals (323), and the rear longitudinal ends of the metatarsophalangeal flexion-extension pull rods (343) are fixedly connected to the rod bodies of the transverse rods (3425), so that the transverse rods (3425) can drive the metatarsophalangeal flexion-extension pull rods (343) to move longitudinally.

8. The exercise device for preventing deep venous thrombosis of the lower limbs according to claim 3, characterized in that the side surface of the top end of the rear sole pedal (321) is provided with a foot fixing belt (329) for covering the foot surface, and the outside of the toe pedal (323) is provided with a finger stall (3210) for fixing toes.

9. The exercise apparatus for preventing deep venous thrombosis of lower limbs according to claim 1, wherein a calf pad (231) is provided on the top surface of said calf-resting plate (23), and a leg fixing band (232) for wrapping and fixing the calf is provided on said calf pad (231).

10. The motion device for preventing deep venous thrombosis of lower limbs according to claim 1, wherein the fixing mechanism (1) comprises a base (11), a dovetail groove (12) is transversely formed in the end face of the longitudinal rear end of the base (11), dovetail heads (27) are respectively arranged at the longitudinal front ends of the lower leg placing bins (21), and the dovetail heads (27) are clamped in the dovetail grooves (12), so that the distance between a pair of lower leg placing bins (21) can be adjusted; the bottom of the two transverse sides of the base (11) is fixedly provided with a fixed clamping head (13) connected with the bed board, and the top of the two transverse sides of the base (11) is provided with a hip fixing belt (14).

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