Limb fixing device for hemodialysis

Abstract

The limb fixing device for hemodialysis comprises a base and a side plate, the outer side of the side plate is connected with a rotating plate and a pipeline positioning mechanism through a first moving assembly, a fixing box and a bearing assembly are arranged in the middle of the base, and the two sides of the fixing box are connected with limiting assemblies through second moving assemblies; according to the limb fixing device, the supporting effect is provided through the bearing assembly, the lateral limiting effect is provided through the limiting assembly, the air bags on the bearing plate and the limiting plate are bulged through the inflation assembly, limbs are fixed, discomfort of a patient is reduced through the air bags in the long-time fixing process, the patient can be prevented from being injured, and the limb fixing effect is improved. Limb compression injury and the like are reduced; the first moving assembly drives the pipeline positioning mechanism to move to a proper position above the limb, so that the position of the pipeline positioning mechanism is adjusted according to limb conditions of different patients and pipeline setting positions, the settable range of the pipeline is expanded, and the use flexibility is improved.

Description

Technical Field

[0001] The invention relates to the technical field of limb fixation, in particular to a limb fixation device for hemodialysis. Background Art

[0002] Hemodialysis is a process of draining blood from the body into a dialyzer, exchanging substances between the blood and the dialysate, removing metabolic waste from the body, maintaining electrolyte and acid-base balance, removing excess water from the body, and returning the purified blood. During hemodialysis, in order to prevent the patient's limbs from moving at will and causing adverse effects, fixed structures will be set up at the limbs to limit limb movement.

[0003] Patent publication number CN118948458A is a limb fixation device for hemodialysis, whose structure mainly includes two parallel guide plates, two fixed plates are arranged between the two guide plates, and a support plate is movably connected to the top of the guide plate, and an adjustment structure and a fixed structure are arranged on the support plate; by adjusting the distance and inclination angle between the fixed plates to make them fully fit the patient's side skin, limb fixation is achieved, and the position of the fixed structure can be adjusted through the adjustment structure to fully adapt to the catheter insertion position.

[0004] However, during use, the above device fixes the limbs through a rigid fixing plate. If the fixing plate is in loose contact with the limbs, the fixation effect is poor. If the fixation is too tight, long-term fixation may easily cause limb discomfort or even compression injury.

[0005] Based on this, the present invention designs a limb fixation device for hemodialysis to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a limb fixation device for hemodialysis to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A limb fixation device for hemodialysis, comprising a base;

[0009] Side plates are symmetrically fixed on both sides of the base, a first moving assembly is provided on the outer side of the side plate, and a rotating shaft is rotatably connected to the first moving assembly, a rotating plate is fixed to the outer end of the rotating shaft, a limiting structure is correspondingly provided on the inner side of the rotating plate, and a pipeline positioning mechanism is provided between the ends of the two rotating plates away from the first moving assembly;

[0010] A fixed box is provided in the middle of the top surface of the base, a supporting assembly is fixed on the top of the fixed box, two second movable assemblies are provided on the fixed box, two limit assemblies are symmetrically provided on the top of each second movable assembly, and the limit assemblies are located on both sides of the supporting assembly;

[0011] The supporting assembly includes an arc-shaped supporting plate fixed to the top of the fixed box, an airbag is arranged on the top of the supporting plate, the limiting assembly includes a limiting plate, an airbag is arranged on one side of the limiting plate close to the supporting plate, and the airbags on the supporting plate and the limiting plate are both connected to the inflation assembly, a vertical mounting cylinder is fixed to the other side of the limiting plate through a connecting block, vertical fixed shafts are symmetrically fixed on both sides of the top of the second moving assembly, the mounting cylinder is rotatably connected to the corresponding fixed shaft, and the bottom end is connected to a fixed structure;

[0012] Air-permeable cushion layers are arranged on opposite sides of the two air bags on the limiting plate and on the top of the air bags on the supporting plate.

[0013] Preferably, the pipeline positioning mechanism includes a positioning frame located on one side of the top of the base, the two ends of the positioning frame are respectively fixedly connected to the rotating plates on both sides, the middle and one side of the positioning frame are respectively rotatably connected with a rotating cylinder, and the first movable shaft is slidably connected in the rotating cylinder located in the middle of the positioning frame, and the second movable shaft is slidably connected in the rotating cylinder located on one side of the positioning frame, the outer ends of the first movable shaft and the second movable shaft both extend out of the rotating cylinder and are fixed with a movable plate, a spring is connected between the movable plate and the positioning frame, and first annular electromagnets are respectively provided on opposite sides of the movable plate and the positioning frame, and the first annular electromagnets are electrically connected to a power supply and a switch;

[0014] The inner end of the first movable shaft is connected to the first tube clamping structure, the inner end of the second movable shaft is fixed with a rotating rod, the other end of the rotating rod extends to the other side of the positioning frame and is connected to the second tube clamping structure, and the middle part of the rotating rod is provided with an arc-shaped avoidance section corresponding to the position of the rotating cylinder in the middle of the positioning frame and the first movable shaft.

[0015] Preferably, the first tube clamping structure and the second tube clamping structure are the same, both comprising a fixed seat, and the fixed seat of the first tube clamping structure is fixedly connected to the first movable shaft, and the fixed seat of the second tube clamping structure is fixedly connected to the second movable shaft, and a fixed clamping block and a movable clamping block are symmetrically arranged on one side of the fixed seat away from the positioning frame, and semicircular clamping grooves are respectively arranged on opposite sides of the movable clamping block and the fixed clamping block;

[0016] The fixed clamp block is fixedly connected to the fixed seat, a spring shaft is fixed on the inner side of the movable clamp block near the fixed seat, one end of the spring shaft passes through the fixed clamp block and is fixed with a spring plate, and a spring is connected between the spring plate and the fixed clamp block.

[0017] Preferably, a plurality of telescopic grooves are evenly arranged on the side wall of the semicircular clamping groove, a telescopic block is connected to the telescopic groove via a spring, and the outer end of the telescopic block is set to be V-shaped and extends out of the telescopic groove.

[0018] Preferably, a plurality of guide strips are evenly fixed on the outer sides of the first movable shaft and the second movable shaft in the circumferential direction, and a plurality of guide grooves are correspondingly provided on the inner side wall of the rotating cylinder, and the guide strips are slidably connected in the corresponding guide grooves.

[0019] Preferably, the inflation assembly includes an air inlet pipe and an air outlet pipe fixed on the limit plate, and the bottom of the support plate is also connected to the air inlet pipe and the air outlet pipe, one end of the multiple air inlet pipes extends into the fixed box and is commonly connected to a pump body, one end of the pump body is connected to an air intake pipe, one end of the multiple air outlet pipes extends into the fixed box, and is commonly connected to an exhaust pipe, and the end of the exhaust pipe extends out of the fixed box.

[0020] Preferably, the first movable component includes a first slider located on the outside of the side plate, the rotating shaft is rotatably connected to the first slider, the first slider is slidably connected to the top surface of the base, and the first slider is threaded with a first screw rod, the outer side surfaces of the side plates are symmetrically and vertically fixed with end plates at both ends, the two ends of the first screw rod are respectively rotatably connected to the end plates on both sides, and one end of the first screw rod extends out of the end plate on the corresponding side and is connected to a motor.

[0021] Preferably, the limiting structure includes a limiting groove located on the inner side of the rotating plate, and the limiting groove is located close to the rotating axis. A receiving groove is provided at a corresponding position on the upper part of the first sliding block, and a limiting block is connected to the receiving groove through a spring. Electromagnet blocks are respectively provided at the inner end of the limiting block and the end of the receiving groove, and the electromagnet block is electrically connected to a power supply and a switch.

[0022] Preferably, the second moving assembly includes a second screw rod rotatably connected between the two side plates, the two side segments of the second screw rod have opposite threaded directions, and the two side segments are respectively threadedly connected with second sliders, and the second slider is slidably connected to the top surface of the base, the bottom end of the fixed shaft is fixed to the middle of the top of the second slider, and the limiting structure is located at the top of the second slider and is correspondingly connected to the mounting cylinder;

[0023] The middle part of the second screw is rotatably connected to the fixed box, and a first bevel gear is fixed to the middle part of the second screw, a second bevel gear is meshed on one side of the first bevel gear, the second bevel gear is connected to a motor, and the first bevel gear, the second bevel gear and the motor are all located inside the fixed box.

[0024] Preferably, the fixed structure includes a second annular electromagnet fixed in the middle of the top of the second slider, the second annular electromagnet is electrically connected to a power supply and a switch, and the bottom end of the fixed shaft is located at the center of the second annular electromagnet, and the bottom of the mounting cylinder is evenly provided with a plurality of vertical spring grooves along the circumferential direction, and a vertical cylindrical magnet block is connected to the spring groove through a spring, and the bottom end of the cylindrical magnet block extends out of the spring groove and contacts with the top end of the second annular electromagnet.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention provides support through the support component, provides lateral limiting function through the limiting component, and inflates the airbags on the support plate and the limiting plate through the inflation component to fix the limbs. The airbags can reduce the patient's discomfort and limb compression injuries during the long-term fixation process;

[0027] 2. The present invention enables the limit plate and the airbag thereon to automatically adapt to the position of the limb by rotating the mounting tube relative to the fixed axis, and the position of the limit plate and the mounting tube is fixed by the fixed structure to avoid the limit plate and other structures from accidentally rotating during subsequent use, thereby further improving the stability of limb fixation;

[0028] 3. The present invention drives the pipeline positioning mechanism to move to a suitable position above the limb through the first moving component, so as to adjust the position of the pipeline positioning mechanism according to the limb conditions of different patients and the pipeline setting position, expand the range of pipeline setting, and improve the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the positioning frame of the present invention;

[0032] Figure 3 is a structural schematic diagram of a first tube clamping structure of the present invention;

[0033] Figure 4 It is a structural schematic diagram of a fixed clamping block and a movable clamping block of the present invention;

[0034] Figure 5 It is a schematic diagram of the end structure of the rotating plate of the present invention;

[0035] Figure 6 It is a schematic structural diagram of the first sliding block of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the supporting plate of the present invention;

[0037] Figure 8 It is a schematic diagram of the middle structure of the second screw of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the limiting plate of the present invention;

[0039] Fig.10 It is a schematic diagram of the top structure of the second sliding block of the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 100-base, 101-side plate, 102-end plate, 103-first screw, 104-first slider, 105-limiting block, 106-accommodating groove, 107-electromagnet block;

[0042] 200-positioning frame, 201-rotating plate, 202-second moving shaft, 203-first moving shaft, 204-moving plate, 205-rotating rod, 206-arc-shaped avoidance section, 207-rotating cylinder, 208-first annular electromagnet, 209-rotating shaft, 210-limiting groove;

[0043] 300-first tube clamping structure, 301-second tube clamping structure, 302-fixed seat, 303-fixed clamping block, 304-movable clamping block, 305-semicircular clamping groove, 306-spring shaft, 307-spring plate, 308-telescopic groove, 309-telescopic block;

[0044] 400-supporting assembly, 401-limiting assembly, 402-supporting plate, 403-air bag, 404-breathable cushion layer, 405-limiting plate, 406-connecting block, 407-inlet pipe, 408-outlet pipe;

[0045] 500-fixed box, 501-second screw rod, 502-second slider, 503-installation cylinder, 504-second annular electromagnet, 505-first bevel gear, 506-second bevel gear, 507-fixed shaft, 508-spring slot, 509-column magnet block. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0047] Embodiment 1, please refer to the attached drawings, the present invention provides a technical solution:

[0048] A limb fixation device for hemodialysis, such as Figure 1 As shown, it includes a base 100;

[0049] The base 100 has side plates 101 symmetrically fixed on both sides, a first moving assembly is provided on the outer side of the side plates 101, and a rotating shaft 209 is rotatably connected to the first moving assembly, a rotating plate 201 is fixed to the outer end of the rotating shaft 209, a limiting structure is correspondingly provided on the inner side of the rotating plate 201, and a pipeline positioning mechanism is provided between the ends of the two rotating plates 201 away from the first moving assembly;

[0050] A fixed box 500 is provided in the middle of the top surface of the base 100, a supporting assembly 400 is fixed on the top of the fixed box 500, two second movable assemblies are provided on the fixed box 500, two limit assemblies 401 are symmetrically provided on the top of each second movable assembly, and the limit assemblies 401 are located on both sides of the supporting assembly 400;

[0051] like Figure 7 As shown, the supporting assembly 400 includes an arc-shaped supporting plate 402 fixed to the top of the fixed box 500, and an air bag 403 is provided on the top of the supporting plate 402. Fig. 9 As shown, the limiting assembly 401 includes a limiting plate 405, and an airbag 403 is provided on one side of the limiting plate 405 close to the supporting plate 402, and the airbags 403 on the supporting plate 402 and the limiting plate 405 are both connected to an inflatable assembly, and a vertical mounting cylinder 503 is fixed to the other side of the limiting plate 405 through a connecting block 406, and vertical fixed shafts 507 are symmetrically fixed on both sides of the top of the second moving assembly, and the mounting cylinder 503 is rotatably connected to the corresponding fixed shaft 507, and the bottom end is connected to a fixed structure;

[0052] Breathable pad layers 404 are provided on the opposite sides of the two airbags 403 on the limiting plate 405 and on the top of the airbags 403 on the supporting plate 402. When supporting and limiting the patient's limbs, the breathable pad layers 404 are in contact with the skin of the limbs, thereby improving the comfort of use and avoiding problems such as sweating and redness due to the skin being suffocated by the airbags 403.

[0053] When fixing the patient's limbs, the limbs are placed on the supporting plate 402 of the supporting assembly 400, and the corresponding limiting assemblies 401 on both sides are moved toward the limbs at the same time through the second moving assembly, and then the airbags 403 on the supporting plate 402 and the limiting plate 405 are inflated through the inflation assembly. The limbs are supported and limited by the airbags 403 in various places. Compared with the limitation of hard structures, the limitation of airbags 403 can reduce the patient's discomfort and reduce limb compression injuries during long-term fixation.

[0054] Among them, when the airbag 403 on the limiting plate 405 comes into contact with the limb, the limiting plate 405 is affected by the limb and will tilt to a certain extent, and drive the mounting tube 503 to rotate around the fixed axis 507, automatically adapting to the position of the limb, and after the limb is fixed by the airbag 403 and other structures, the relative position of the mounting tube 503 and the fixed axis 507 is fixed by the fixing structure, avoiding accidental rotation of the limiting plate 405 and other structures during subsequent use, thereby further improving the stability of limb fixation.

[0055] After the limb is fixed, the rotating plate 201 is rotated to a vertical position so that the pipeline positioning mechanism moves to the top of the supporting plate 402. The position of the rotating plate 201 and the pipeline positioning mechanism is then limited by the limiting structure to keep them in a vertical state. The pipeline positioning mechanism is driven to move to a suitable position above the limb by the first moving component, so that the position of the pipeline positioning mechanism can be adjusted according to the limb conditions of different patients and the pipeline setting position, thereby expanding the range in which the pipeline can be set and improving the flexibility of use.

[0056] The pipeline positioning mechanism includes a positioning frame 200 located on one side of the top of the base 100. Figure 2 As shown, the two ends of the positioning frame 200 are respectively fixedly connected to the rotating plates 201 on both sides, the middle and one side of the positioning frame 200 are respectively rotatably connected with the rotating cylinder 207, and the first moving shaft 203 is slidably connected in the rotating cylinder 207 located in the middle of the positioning frame 200, and the second moving shaft 202 is slidably connected in the rotating cylinder 207 located on one side of the positioning frame 200, the outer ends of the first moving shaft 203 and the second moving shaft 202 both extend out of the rotating cylinder 207, and are fixed with a moving plate 204, a spring is connected between the moving plate 204 and the positioning frame 200, and first annular electromagnets 208 are respectively provided on the opposite sides of the moving plate 204 and the positioning frame 200, and the first annular electromagnets 208 are electrically connected to a power supply and a switch;

[0057] The inner end of the first movable shaft 203 is connected to the first tube clamping structure 300, and the inner end of the second movable shaft 202 is fixed with a rotating rod 205. The other end of the rotating rod 205 extends to the other side of the positioning frame 200 and is connected to the second tube clamping structure 301. The middle part of the rotating rod 205 is provided with an arc-shaped avoidance section 206 corresponding to the position of the rotating cylinder 207 in the middle of the positioning frame 200 and the first movable shaft 203.

[0058] When the pipeline positioning mechanism is used, the movable plate 204 in the middle of the positioning frame 200 is pressed, and the first annular electromagnet 208 is energized to attract and fix the first pipe clamping structure 300, so that the first pipe clamping structure 300 is close to the limb and fixed in position, which is convenient for subsequent positioning of the pipeline;

[0059] Then, the rotating cylinder 207 at the first movable axis 203 is rotated, so that the rotating rod 205 drives the second pipe clamping structure 301 to rotate out from the bottom of the positioning frame 200 and to be located at a suitable angle, and the movable plate 204 is pressed, and the first annular electromagnet 208 that is energized is attracted and fixed, so that the second pipe clamping structure 301 is close to the limb and fixed in position, so that the pipeline can be fixed for the second time according to the distribution position of the pipeline later, thereby improving the positioning effect of the pipeline, and the second pipe clamping structure 301 can adjust its position to improve the flexibility of the pipeline fixing position.

[0060] Among them, Figure 3 As shown, the first tube clamping structure 300 and the second tube clamping structure 301 are the same, both comprising a fixed seat 302, and the fixed seat 302 of the first tube clamping structure 300 is fixedly connected to the first movable shaft 203, and the fixed seat 302 of the second tube clamping structure 301 is fixedly connected to the second movable shaft 202, and a fixed clamping block 303 and a movable clamping block 304 are symmetrically arranged on one side of the fixed seat 302 away from the positioning frame 200, and semicircular clamping grooves 305 are respectively arranged on opposite sides of the movable clamping block 304 and the fixed clamping block 303;

[0061] The fixed clamp block 303 is fixedly connected to the fixed seat 302, and a spring shaft 306 is fixed on the inner side of the movable clamp block 304 near the fixed seat 302. One end of the spring shaft 306 passes through the fixed clamp block 303 and is fixed with a spring plate 307, and a spring is connected between the spring plate 307 and the fixed clamp block 303.

[0062] When the pipeline needs to be fixed, the spring plate 307 and the spring shaft 306 are pressed to move the movable clamp 304 away from the fixed clamp 303, and the pipeline is located between the two semicircular clamp grooves 305. Then the spring plate 307 is released to return the movable clamp 304 under the action of the spring. The fixed clamp 303 and the movable clamp 304 cooperate to clamp and fix the pipeline. The fixing operation is simple and convenient.

[0063] Among them, Figure 1 As shown, the first moving assembly includes a first slider 104 located outside the side plate 101, the rotating shaft 209 is rotatably connected to the first slider 104, the first slider 104 is slidably connected to the top surface of the base 100, and the first slider 104 is threadedly connected with a first screw 103, as shown in FIG. Figure 5 As shown, end plates 102 are symmetrically and vertically fixed at both ends of the outer side surface of the side plate 101, and both ends of the first screw rod 103 are rotatably connected to the end plates 102 on both sides, and one end of the first screw rod 103 extends out of the end plate 102 on the corresponding side and is connected to a motor.

[0064] When the positioning frame 200 rotates to the top of the supporting plate 402, the corresponding first screw 103 is rotated by the motors on both sides, and the first slider 104 and the rotating plate 201 thereon are driven to move by the first screw 103, thereby achieving the position adjustment of the positioning frame 200, so that the first tube clamping structure 300 and the second tube clamping structure 301 are located at appropriate positions above the supporting plate 402.

[0065] The second moving assembly includes a second screw rod 501 rotatably connected between the two side plates 101, the two side segments of the second screw rod 501 have opposite thread rotation directions, and the two side segments are respectively threadedly connected with a second slider 502, such as Figure 5 As shown, the second slider 502 is slidably connected to the top surface of the base 100, the bottom end of the fixed shaft 507 is fixed to the middle of the top of the second slider 502, and the limiting structure is located at the top of the second slider 502 and is correspondingly connected to the mounting tube 503;

[0066] like Figure 8 As shown, the middle part of the second screw rod 501 is rotatably connected to the fixed box 500, and a first bevel gear 505 is fixed to the middle part of the second screw rod 501, a second bevel gear 506 is meshed with one side of the first bevel gear 505, the second bevel gear 506 is connected to a motor, and the first bevel gear 505, the second bevel gear 506 and the motor are all located inside the fixed box 500.

[0067] When adjusting the positions of the limit plates 405 on both sides, the second screw 501 is rotated through the drive of the motor and the transmission of the first bevel gear 505 and the second bevel gear 506, so that the second sliders 502 on both sides move inward at the same time, and drive the limit plates 405 to move toward the supporting plate 402. When the limb fixation is cancelled, the second screw 501 rotates in the opposite direction, so that the two second sliders 502 and the two limit plates 405 move outward at the same time.

[0068] Embodiment 2: The structure of this embodiment is basically the same as that of embodiment 1, except that Fig. 9 As shown, the inflation component includes an air inlet pipe 407 and an air outlet pipe 408 fixed on the limit plate 405, and the bottom of the supporting plate 402 is also connected to the air inlet pipe 407 and the air outlet pipe 408, one end of the multiple air inlet pipes 407 extends into the fixed box 500, and is commonly connected to a pump body, one end of the pump body is connected to an air intake pipe, one end of the multiple air outlet pipes 408 extends into the fixed box 500, and is commonly connected to an exhaust pipe, and the end of the exhaust pipe extends out of the fixed box 500, and a ventilation groove is provided on the side wall of the fixed box 500 to facilitate the operation of the pump body, and valves are provided on the air intake pipe and the exhaust pipe.

[0069] When the limb is placed on the support plate 402 and the limiting plates 405 are located on both sides of the limb, the valve of the air outlet pipe 408 is closed, and gas is delivered to each air bag 403 through the air pump to make the air bag 403 inflate and provide support and limiting fixation for the limb; when the room temperature is low, the valve of the air outlet pipe 408 can be opened, and the valve opening size can be adjusted to slow down the exhaust speed, and then warm gas is delivered to multiple air inlet pipes 407 through the suction pipe and the pump body, and enters each air bag 403, and the excess cold gas is slowly discharged through the air outlet pipe 408, so that the inside of the air bag 403 maintains a certain temperature, thereby improving the comfort of the limb when it is fixed, avoiding excessive cooling of the limb and affecting other problems.

[0070] Embodiment 3: The structure of this embodiment is basically the same as that of embodiment 1, except that Figure 6 As shown, the limiting structure includes a limiting groove 210 located on the inner side of the rotating plate 201, and the position of the limiting groove 210 is close to the rotating shaft 209. A receiving groove 106 is provided at a corresponding position on the upper part of the first slider 104. A limiting block 105 is connected to the receiving groove 106 through a spring. The inner end of the limiting block 105 and the end of the receiving groove 106 are respectively provided with an electromagnet block 107, and the electromagnet block 107 is electrically connected to a power supply and a switch.

[0071] When the rotating plate 201 rotates to a vertical state, the limit block 105 extends into the limit groove 210 under the action of the spring, thereby limiting the position of the rotating plate 201 through the limit block 105 and the limit groove 210, and then the position of the pipeline positioning mechanism is rotated to the top of the supporting plate 402 and then fixed, so as to facilitate the subsequent clamping and positioning operation of the pipeline; when it is necessary to cancel the limit on the rotating plate 201, the electromagnet block 107 is energized to attract each other, so that the limit block 105 moves toward the inside of the accommodating groove 106 and disengages from the limit groove 210 on the rotating plate 201, so that the rotating plate 201 can drive the positioning frame 200 to rotate.

[0072] like Fig.10 As shown, the fixed structure includes a second annular electromagnet 504 fixed in the middle of the top of the second slider 502, the second annular electromagnet 504 is electrically connected to a power supply and a switch, and the bottom end of the fixed shaft 507 is located at the center of the second annular electromagnet 504, and a plurality of vertical spring grooves 508 are evenly arranged at the bottom of the mounting cylinder 503 along the circumferential direction, and a vertical cylindrical magnet block 509 is connected to the spring groove 508 through a spring, and the bottom end of the cylindrical magnet block 509 extends out of the spring groove 508 and contacts with the top end of the second annular electromagnet 504.

[0073] After the angle adjustment of the limit plate 405 and the mounting tube 503 is completed, the second annular electromagnet 504 is energized, and contacts with the bottom end of the cylindrical magnet block 509 by attraction, and the position of the cylindrical magnet block 509 is fixed, thereby fixing the position of the mounting tube 503 and the limit plate 405 and other structures, thereby fixing the position of the limit plate 405 and avoiding accidental rotation of the limit plate 405 during use.

[0074] Embodiment 4: The structure of this embodiment is basically the same as that of embodiment 1, except that Figure 4 As shown, a plurality of expansion grooves 308 are evenly arranged on the side wall of the semicircular clamping groove 305, and a expansion block 309 is connected to the expansion groove 308 through a spring. The outer end of the expansion block 309 is set to be V-shaped and extends out of the expansion groove 308. When the pipeline is fixed by the fixed clamping block 303 and the movable clamping block 304, the plurality of expansion blocks 309 contact the outer wall of the pipeline through the outer end of the V-shape, thereby improving the fixing effect of the pipeline through the action of the spring and the expansion block 309, and can fix pipelines of different diameters, thereby improving the scope of application.

[0075] Embodiment 5: The structure of this embodiment is basically the same as that of embodiment 1, except that Figure 4 As shown, a plurality of guide strips are evenly fixed on the outer surfaces of the first movable shaft 203 and the second movable shaft 202 in the circumferential direction, and a plurality of guide grooves are correspondingly provided on the inner wall of the rotating cylinder 207. The guide strips are slidably connected in the corresponding guide grooves, and the relative sliding of the first movable shaft 203, the second movable shaft 202 and the corresponding rotating cylinder 207 is achieved through the guide strips and the guide grooves.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A limb fixation device for hemodialysis, comprising a base (100), characterized in that: Side plates (101) are symmetrically fixed on both sides of the base (100), a first movable assembly is provided on the outer side of the side plate (101), and a rotating shaft (209) is rotatably connected to the first movable assembly, a rotating plate (201) is fixed to the outer end of the rotating shaft (209), a limiting structure is correspondingly provided on the inner side surface of the rotating plate (201), and a pipeline positioning mechanism is provided between the ends of the two rotating plates (201) away from the first movable assembly; A fixed box (500) is provided in the middle of the top surface of the base (100), a supporting assembly (400) is fixed on the top of the fixed box (500), two second movable assemblies are provided on the fixed box (500), two limiting assemblies (401) are symmetrically provided on the top of each second movable assembly, and the limiting assemblies (401) are located on both sides of the supporting assembly (400); The supporting assembly (400) includes an arc-shaped supporting plate (402) fixed to the top of the fixed box (500), and an airbag (403) is provided on the top of the supporting plate (402). The limiting assembly (401) includes a limiting plate (405), and an airbag (403) is provided on the side of the limiting plate (405) close to the supporting plate (402), and the airbags (403) on the supporting plate (402) and the limiting plate (405) are both connected to an inflation assembly, and a vertical mounting tube (503) is fixed to the other side of the limiting plate (405) through a connecting block (406), and vertical fixed shafts (507) are symmetrically fixed on both sides of the top of the second movable assembly, and the mounting tube (503) is rotatably connected to the corresponding fixed shaft (507), and the bottom end is connected to a fixed structure.

2. The limb fixation device for hemodialysis according to claim 1, characterized in that: The pipeline positioning mechanism comprises a positioning frame (200) located on one side of the top of the base (100), the two ends of the positioning frame (200) are respectively fixedly connected to the rotating plates (201) on both sides, the middle and one side of the positioning frame (200) are respectively rotatably connected with a rotating cylinder (207), and a first movable shaft (203) is slidably connected in the rotating cylinder (207) located in the middle of the positioning frame (200), and a second movable shaft (202) is slidably connected in the rotating cylinder (207) located on one side of the positioning frame (200), the outer ends of the first movable shaft (203) and the second movable shaft (202) both extend out of the rotating cylinder (207) and are fixed with a movable plate (204), a spring is connected between the movable plate (204) and the positioning frame (200), and first annular electromagnets (208) are respectively provided on the opposite sides of the movable plate (204) and the positioning frame (200), and the first annular electromagnets (208) are electrically connected to a power supply and a switch; The inner end of the first movable shaft (203) is connected to the first tube clamping structure (300), the inner end of the second movable shaft (202) is fixed with a rotating rod (205), the other end of the rotating rod (205) extends to the other side of the positioning frame (200) and is connected to the second tube clamping structure (301), and the middle part of the rotating rod (205) is provided with an arc-shaped avoidance section (206) corresponding to the position of the rotating cylinder (207) in the middle of the positioning frame (200) and the first movable shaft (203).

3. The limb fixation device for hemodialysis according to claim 2, characterized in that: The first tube clamping structure (300) and the second tube clamping structure (301) are the same, both comprising a fixed seat (302), and the fixed seat (302) of the first tube clamping structure (300) is fixedly connected to the first movable shaft (203), and the fixed seat (302) of the second tube clamping structure (301) is fixedly connected to the second movable shaft (202), and a fixed clamping block (303) and a movable clamping block (304) are symmetrically arranged on one side of the fixed seat (302) away from the positioning frame (200), and semicircular clamping grooves (305) are respectively arranged on opposite sides of the movable clamping block (304) and the fixed clamping block (303); The fixed clamp block (303) is fixedly connected to the fixed seat (302); a spring shaft (306) is fixed on the inner side surface of the movable clamp block (304) near the fixed seat (302); one end of the spring shaft (306) passes through the fixed clamp block (303) and is fixed with a spring plate (307); and a spring is connected between the spring plate (307) and the fixed clamp block (303).

4. The limb fixation device for hemodialysis according to claim 3, characterized in that: A plurality of telescopic grooves (308) are evenly arranged on the side wall of the semicircular clamping groove (305), and a telescopic block (309) is connected to the telescopic groove (308) via a spring, and the outer end of the telescopic block (309) is set to be V-shaped and extends out of the telescopic groove (308).

5. The limb fixation device for hemodialysis according to claim 2, characterized in that: A plurality of guide strips are evenly fixed on the outer surfaces of the first movable shaft (203) and the second movable shaft (202) in the circumferential direction, and a plurality of guide grooves are correspondingly arranged on the inner side wall of the rotating cylinder (207), and the guide strips are slidably connected to the corresponding guide grooves.

6. The limb fixation device for hemodialysis according to claim 1, characterized in that: The inflation assembly includes an air inlet pipe (407) and an air outlet pipe (408) fixed on the limiting plate (405), and the bottom of the supporting plate (402) is also connected to the air inlet pipe (407) and the air outlet pipe (408), one end of the plurality of air inlet pipes (407) extends into the fixed box (500) and is commonly connected to a pump body, one end of the pump body is connected to an air intake pipe, one end of the plurality of air outlet pipes (408) extends into the fixed box (500) and is commonly connected to an exhaust pipe, and the end of the exhaust pipe extends out of the fixed box (500).

7. The limb fixation device for hemodialysis according to claim 1, characterized in that: The first moving component comprises a first slider (104) located on the outside of the side plate (101), the rotating shaft (209) is rotatably connected to the first slider (104), the first slider (104) is slidably connected to the top surface of the base (100), and the first slider (104) is threadedly connected with a first screw rod (103), and the end plates (102) are symmetrically and vertically fixed at both ends of the outer side surface of the side plate (101), and the two ends of the first screw rod (103) are respectively rotatably connected to the end plates (102) on both sides, and one end of the first screw rod (103) extends out of the end plate (102) on the corresponding side and is connected to a motor.

8. The limb fixation device for hemodialysis according to claim 7, characterized in that: The limiting structure comprises a limiting groove (210) located on the inner side of the rotating plate (201), and the limiting groove (210) is located close to the rotating shaft (209); a corresponding position on the upper part of the first sliding block (104) is provided with a receiving groove (106); a limiting block (105) is connected to the receiving groove (106) via a spring; an electromagnet block (107) is respectively provided at the inner side end of the limiting block (105) and the end of the receiving groove (106); and the electromagnet block (107) is electrically connected to a power supply and a switch.

9. The limb fixation device for hemodialysis according to claim 1, characterized in that: The second moving assembly comprises a second screw rod (501) rotatably connected between the two side plates (101), the two side sections of the second screw rod (501) have opposite threaded directions, and the two side sections are respectively threadedly connected with second sliders (502), and the second slider (502) is slidably connected to the top surface of the base (100), the bottom end of the fixed shaft (507) is fixed to the middle of the top of the second slider (502), and the limiting structure is located at the top of the second slider (502) and is correspondingly connected to the mounting cylinder (503); The middle part of the second screw rod (501) is rotatably connected to the fixed box (500), and a first bevel gear (505) is fixed to the middle part of the second screw rod (501), a second bevel gear (506) is meshed with one side of the first bevel gear (505), the second bevel gear (506) is connected to a motor, and the first bevel gear (505), the second bevel gear (506) and the motor are all located inside the fixed box (500).

10. The limb fixation device for hemodialysis according to claim 9, characterized in that: The fixing structure comprises a second annular electromagnet (504) fixed in the middle of the top of the second slider (502), the second annular electromagnet (504) is electrically connected to a power source and a switch, and the bottom end of the fixing shaft (507) is located at the center of the second annular electromagnet (504), and the bottom of the mounting cylinder (503) is evenly provided with a plurality of vertical spring grooves (508) along the circumferential direction, and a vertical columnar magnet block (509) is connected to the spring groove (508) through a spring, and the bottom end of the columnar magnet block (509) extends out of the spring groove (508) and contacts the top end of the second annular electromagnet (504).

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