A limb restraint device for tumor radiotherapy

Abstract

The present invention discloses a limb restraint device for tumor radiotherapy, comprising a radiotherapy bed supported by an external bracket and placed on the ground, wherein positioning seats for positioning the patient's lower body are fixedly connected at symmetrical positions on both sides of one end of the radiotherapy bed, connecting rods for limiting the patient's thighs on both sides are rotatably connected via pins at symmetrical positions on both sides of the positioning seat on each side, a first semicircular ring for supporting the patient's thighs is fixedly connected on opposite surfaces of the two connecting rods on each side, an adjusting rod for limiting the patient's calves on both sides of the connecting rod away from the positioning seat is rotatably connected via pins, a second semicircular ring for supporting the patient's calves is fixedly connected on opposite surfaces of the adjusting rods on each side, and an adjusting mechanism for adjusting the position of the patient's lower body is provided on the radiotherapy bed. The application has the function of increasing overall stability by adjusting the patient's position, thereby improving the radiotherapy effect on the tumor target area.

Description

Technical Field

[0001] The present invention relates to the technical field of limb restraint for tumor radiotherapy, and in particular to a limb restraint device for tumor radiotherapy. Background Art

[0002] Tumor radiation therapy (radiotherapy) is a treatment method that uses high-energy radiation or particle beams to kill cancer cells. It destroys the DNA structure of cancer cells, preventing them from continuing to grow and divide, thereby achieving the effect of controlling or eliminating tumors.

[0003] Radiotherapy has a wide range of indications, covering almost all types of malignant tumors. Radiotherapy is often used as a comprehensive treatment method in combination with surgery, chemotherapy, targeted therapy and immunotherapy to improve the treatment effect and prolong the patient's survival.

[0004] The existing Chinese patent with publication number CN118161763A includes a support frame, a slide plate, an electric bed board, a position restraint mechanism and an upper limb restraint mechanism. The slide plate is fixedly connected to the top of the support frame, the electric bed board is slidably connected to the slide plate, a plurality of circular holes are opened on both sides of the electric bed board, the circular holes on the electric bed board are reserved installation holes, the position restraint mechanism is arranged on the electric bed board, and the upper limb restraint mechanism is arranged on the position restraint mechanism.

[0005] When the above device is in use, the movement of the guide slot rod frame will drive the two guide levers to move toward the side close to each other, thereby driving one bevel slot ring to rotate in the forward direction and the other bevel slot ring to rotate in the reverse direction. The rotation of the bevel slot ring will cause the magnet blocks to adsorb to each other through the semicircular buckle, thereby limiting the patient's arm and preventing the patient's arm position from changing, thereby allowing the patient to maintain a consistent posture during radiotherapy and improving the effect of radiotherapy. However, in actual use, since the patient is in a lying position and has a certain physiological curvature of the waist (lumbar lordosis), it is difficult for the back to fully contact the radiotherapy bed, and lacks sufficient support, which can easily increase the range of motion of the abdomen and chest, causing displacement of the chest and abdominal trachea, affecting the radiotherapy target area, and therefore it is difficult to increase the overall stability by adjusting the patient's position.

[0006] To this end, we proposed a limb restraint device for tumor radiotherapy. Summary of the invention

[0007] The purpose of the present invention is to provide a limb restraint device for tumor radiotherapy, which has the advantage of increasing overall stability by adjusting the patient's position and solves the problems in the background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a limb restraint device for tumor radiotherapy, comprising a radiotherapy bed placed on the ground with the support of an external bracket, wherein positioning seats for positioning the patient's lower body are fixedly connected at two symmetrical positions on both sides of one end of the radiotherapy bed, and connecting rods for limiting the patient's thighs are rotatably connected to the positioning seats on each side through pins, and a first semicircular ring for supporting the patient's thighs is fixedly connected to the opposite surfaces of the two connecting rods on each side, and an adjustment rod for limiting the patient's calves is rotatably connected to the end of the connecting rod away from the positioning seat through a pin, and a second semicircular ring for supporting the patient's calves is fixedly connected to the opposite surface of the adjustment rod on each side, and the radiotherapy bed is provided with an adjustment mechanism for adjusting the position of the patient's lower body.

[0009] Preferably, the adjustment mechanism includes a limiting groove on one end of the radiotherapy bed close to the second semicircular ring, the inner wall of the limiting groove is movably connected with a T-shaped rod for pushing the connecting rod and the adjusting rod to adjust the knee flexion of the patient's lower body, and one end of each adjusting rod away from the first semicircular ring is rotatably connected to the T-shaped rod through a pin shaft;

[0010] One end of the radiotherapy bed close to the T-shaped rod penetrates the inner wall of the limiting groove and is rotatably connected to a threaded rod driven to rotate by a power mechanism, and the T-shaped rod is penetrated by the threaded rod and screwed, and the power mechanism is an energized motor.

[0011] Preferably, rectangular slide grooves are provided at symmetrical positions on both sides of the radiotherapy bed, and the inner walls of the rectangular slide grooves on both sides are movably connected with moving rods for horizontal reciprocating movement, and the two ends of the T-shaped rod are respectively fixedly connected to the moving rod on the adjacent side, and the moving rod is provided with a stretching mechanism for stretching the patient's arm;

[0012] The stretching mechanism comprises two moving rods, one end of which is away from the T-shaped rod and is fixedly connected to an n-shaped frame, and handles for patients to grasp are fixedly connected at symmetrical positions near both sides of the n-shaped frame, and circular orifice plates are fixedly connected at positions corresponding to the handles on both sides of the n-shaped frame through external brackets.

[0013] Preferably, the two circular orifice plates are provided with a plurality of evenly arranged rectangular through grooves, the inner wall of each of the rectangular through grooves is movably connected with an L-shaped block, and the end of each of the L-shaped blocks away from the circular orifice plate is fixedly connected with an arc-shaped splint for clamping the patient's arm, and the n-shaped frame is provided with an auxiliary mechanism for driving the L-shaped block and the arc-shaped splint to retract or expand and move back and forth.

[0014] Preferably, the auxiliary mechanism includes circular plates rotatably connected to the circular orifice plates at positions corresponding to the circular orifice plates on both sides of the n-shaped frame through pin shafts, arc-shaped through grooves are provided at positions corresponding to the L-shaped blocks on both sides, and the inner wall of each of the arc-shaped through grooves is movably connected to a movable rod for pulling the L-shaped block and the arc clamping plate to retract or expand and reciprocate, and one end of each movable rod away from the circular plate is fixedly connected to the L-shaped block at the corresponding position, and toothed rings are fixedly connected to the outer contours of the two circular plates, and movable grooves are provided at symmetrical positions on both sides of the n-shaped frame, and the inner walls of the movable grooves are movably connected to toothed plates for meshing transmission with the toothed rings.

[0015] Preferably, fixing rods are fixedly connected at symmetrical positions on both sides of the radiotherapy bed, and Z-shaped frames are fixedly connected to the two fixing rods. Sliders are movably connected to the inner walls of the Z-shaped frames on both sides, and one end of the slide on each side away from the Z-shaped frame is fixedly connected to the tooth plate on the adjacent side.

[0016] Preferably, an airbag is fixedly connected to the inner wall of each arc-shaped clamping plate, a connecting pipe is penetrated and fixedly connected to each airbag, and an inflation mechanism for inflating and deflating the interior of the airbag is provided on the circular hole plate.

[0017] Preferably, the inflation mechanism includes two circular orifice plates whose outer contours are fixedly connected to fixed blocks at positions corresponding to the L-shaped blocks, each of the fixed blocks is fixedly connected to a cylindrical shell, and the end of the connecting tube away from the airbag passes through the inner wall of the cylindrical shell on an adjacent side and is fixedly connected, the inner wall of each cylindrical shell is movably connected to a piston rod for inflating and exhausting the inside of the airbag, and each end of the piston rod away from the cylindrical shell is fixedly connected to the L-shaped block at the corresponding position.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The threaded rod is driven by a motor to perform fixed-axis reciprocating rotation on the radiotherapy bed, so that the T-shaped rod can perform horizontal reciprocating movement along the inner wall of the limiting groove under the action of the threaded rod. When the T-shaped rod moves in the direction close to the positioning seat, the adjusting rod and the opposite end of the second semicircular ring can be relatively rotated in the direction away from the radiotherapy bed under the action of the T-shaped rod, and the patient's thigh and calf are respectively fixed to the inner walls of the first semicircular ring and the second semicircular ring, so that the connecting rod and the adjusting rod can drive the patient's thigh and calf to bend and adjust the knee, thereby adjusting the patient's body position. When the knee is bent, the posture of the pelvis and lumbar spine changes, the curvature of the waist and lower back is reduced, and the waist is attached to the radiotherapy bed, which can reduce the movement range of the waist and abdomen during breathing, improve the radiotherapy accuracy of the tumor target area, and avoid excessive displacement of the tumor in the abdominal cavity or chest cavity during breathing, which affects the radiotherapy effect on the tumor target area.

[0020] 2. First, the patient passes both hands through the inner wall of the circular hole plate and grasps the handles. When the T-shaped rod moves toward the positioning seat to adjust the knee flexion, the moving rod drives the n-shaped frame to move horizontally away from the positioning seat under the action of the T-shaped rod. Therefore, the handles can stretch the patient's upper limbs to the top of the head, and the chest or abdominal area is fully exposed, which is conducive to the accurate irradiation of radiation and improves the effect of radiotherapy.

[0021] 3. When the moving rod drives the N-shaped frame to move in the direction away from the positioning seat, the N-shaped frame can drive the tooth plate and the slider to move synchronously, so that the slider can pull the tooth plate to move in the vertical direction close to the radiotherapy bed under the action of the inclined surface of the Z-shaped frame, and the gear ring drives the circular plate to rotate in the B direction under the action of the tooth plate, so that the movable rod pulls the L-shaped block to retract and move under the action of the arc-shaped through groove, and at the same time, the arc-shaped splint can clamp the patient's wrist and limit it under the action of the L-shaped block, which can effectively fix the patient's upper limbs and prevent movement during radiotherapy.

[0022] 4. As the L-shaped block drives the arc splint to contract and move to clamp the patient's wrist, the piston rod moves toward the connecting tube under the pull of the L-shaped block. At this time, the inner wall of the cylindrical shell near one end of the connecting tube is in a positive pressure state, and then the connecting tube can fill the gas inside the cylindrical shell into the interior of the airbag, and the airbag can expand and clamp the patient's wrist, so that the airbag can evenly distribute the pressure of the arc splint, further improving the patient's comfort.

[0023] The coordinated use of the above-mentioned structure solves the problem that, in actual use of the existing device, since the patient is in a lying position and has a certain physiological curvature of the waist (lumbar lordosis), it is difficult for the back to fully contact the radiotherapy bed, and lacks sufficient support, which easily increases the range of motion of the abdomen and chest, causing displacement of the trachea in the chest and abdomen, affecting the radiotherapy target area, and therefore it is difficult to increase the overall stability by adjusting the patient's position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the threaded rod of the present invention;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the n-shaped frame of the present invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the circular plate of the present invention;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the tooth plate of the present invention;

[0029] Figure 6 For the present invention Figure 3 Schematic diagram of the structure at A in the middle;

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the L-shaped block of the present invention;

[0031] Figure 8 It is a schematic cross-sectional view of the three-dimensional structure of the cylindrical shell of the present invention.

[0032] In the figure: 1, radiotherapy bed; 101, limit groove; 102, rectangular slide groove; 2, positioning seat; 3, connecting rod; 4, first semicircular ring; 5, adjusting rod; 6, second semicircular ring; 7, T-shaped rod; 8, threaded rod; 9, moving rod; 10, N-shaped frame; 111, movable groove; 11, handle; 12, circular hole plate; 121, rectangular through groove; 13, L-shaped block; 14, arc-shaped splint; 15, circular plate; 151, arc-shaped through groove; 16, movable rod; 17, tooth plate; 18, fixed rod; 19, Z-shaped frame; 20, slider; 21, tooth ring; 22, airbag; 23, fixed block; 24, cylindrical shell; 25, piston rod; 26, connecting pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0034] See also Figures 1 to 8 The present invention provides a technical solution: a limb restraint device for tumor radiotherapy, comprising a radiotherapy bed 1 supported by an external bracket and placed on the ground, wherein positioning seats 2 for positioning the patient's lower body are fixedly connected at symmetrical positions on both sides of one end of the radiotherapy bed 1, and connecting rods 3 for limiting the patient's thighs are rotatably connected to the symmetrical positions on both sides of the positioning seat 2 on each side through pins, and first semicircular rings 4 for supporting the patient's thighs are fixedly connected to the opposite surfaces of the two connecting rods 3 on each side, and adjusting rods 5 for limiting the patient's calves are rotatably connected to the ends of the connecting rods 3 away from the positioning seat 2 through pins, and second semicircular rings 6 for supporting the patient's calves are fixedly connected to the opposite surfaces of the adjusting rods 5 on each side, and the radiotherapy bed 1 is provided with an adjustment mechanism for adjusting the position of the patient's lower body.

[0035] During use, by setting up the radiotherapy bed 1, the radiotherapy bed 1 is supported and placed on the ground by an external bracket, thereby improving the stability of the radiotherapy bed 1, and the positioning seat 2 is provided on the radiotherapy bed 1. First, the patient lies flat on the radiotherapy bed 1, and places both legs on the inner walls of the positioning seat 2 on both sides, so that the positioning seat 2 supports and positions the patient's legs, and through the connecting rod 3 provided on the positioning seat 2 and the first semicircular ring 4 provided on the connecting rod 3, the patient's thigh is placed on the inner wall of the first semicircular ring 4, and at the same time, the connecting rod 3 can support and limit both sides of the thigh, and through the adjusting rod 5 provided on the connecting rod 3 and the second semicircular ring 6 provided on the adjusting rod 5, the patient's calf is placed on the inner wall of the second semicircular ring 6, and the adjusting rod 5 can support and limit both sides of the patient's calf, and the patient's thigh and calf are respectively fixed to the inner walls of the first semicircular ring 4 and the second semicircular ring 6 by external straps, thereby further improving the stability of the patient's lower body, and through the adjusting mechanism provided on the radiotherapy bed 1, the adjusting mechanism can adjust the position of the patient's lower body. Embodiment 2

[0036] On the basis of the first embodiment, further:

[0037] The adjustment mechanism includes a limiting groove 101 on one end of the radiotherapy bed 1 close to the second semicircular ring 6, and the inner wall of the limiting groove 101 is movably connected with a T-shaped rod 7 for pushing the connecting rod 3 and the adjusting rod 5 to adjust the knee flexion of the patient's lower body, and each end of the adjusting rod 5 away from the first semicircular ring 4 is rotatably connected to the T-shaped rod 7 through a pin shaft;

[0038] One end of the radiotherapy bed 1 close to the T-shaped rod 7 penetrates the inner wall of the limiting groove 101 and is rotatably connected to a threaded rod 8 driven by a power mechanism, and the T-shaped rod 7 is penetrated by the threaded rod 8 and screwed. The power mechanism is an energized motor.

[0039] When in use, through the limit groove 101 opened on the radiotherapy bed 1, the inner wall of the limit groove 101 is movably connected with the T-shaped rod 7, so that the limit groove 101 limits the moving direction of the T-shaped rod 7. Through the threaded rod 8 set on the radiotherapy bed 1, and the threaded rod 8 is driven to rotate by the motor, the motor can drive the threaded rod 8 to perform a fixed-axis reciprocating rotation on the radiotherapy bed 1, and the inner threaded rod 8 of the T-shaped rod 7 passes through and is screwed, accompanied by the fixed-axis reciprocating rotation of the threaded rod 8, so that the T-shaped rod 7 can move horizontally back and forth along the inner wall of the limit groove 101 under the action of the threaded rod 8.

[0040] The adjusting rod 5 is rotatably connected to the T-shaped rod 7 by a pin shaft. When the T-shaped rod 7 moves toward the direction close to the positioning seat 2, the adjusting rod 5 and the opposite end of the second semicircular ring 6 can be relatively rotated in the direction away from the radiotherapy bed 1 under the action of the T-shaped rod 7. The patient's thigh and calf are respectively fixed to the inner walls of the first semicircular ring 4 and the second semicircular ring 6, so that the connecting rod 3 and the adjusting rod 5 can drive the patient's thigh and calf to bend the knee, thereby adjusting the patient's body position. When the knee is bent, the posture of the pelvis and lumbar spine changes, the curvature of the waist and lower back is reduced, and the waist is attached to the radiotherapy bed 1, which can reduce the movement amplitude of the waist and abdomen during breathing, improve the radiotherapy accuracy of the tumor target area, and avoid excessive displacement amplitude of the tumor in the abdominal cavity or thoracic cavity during breathing, which affects the radiotherapy effect of the tumor target area. Embodiment 3

[0041] On the basis of the second embodiment, further:

[0042] Rectangular slides 102 are provided at symmetrical positions on both sides of the radiotherapy bed 1, and the inner walls of the rectangular slides 102 on both sides are movably connected with moving rods 9 for horizontal reciprocating movement, and the two ends of the T-shaped rod 7 are respectively fixedly connected to the moving rod 9 on the adjacent side, and the moving rod 9 is provided with a stretching mechanism for stretching the patient's arm;

[0043] The stretching mechanism includes two moving rods 9, one end of which is away from the T-shaped rod 7 and is fixedly connected to an n-shaped frame 10. The n-shaped frame 10 is fixedly connected to handles 11 for patients to grasp at symmetrical positions on both sides, and circular orifice plates 12 are fixedly connected to the positions on both sides of the n-shaped frame 10 corresponding to the handles 11 through external brackets.

[0044] When in use, through the circular hole plate 12 set on the radiotherapy bed 1 and the moving rod 9 set on the rectangular slide groove 102, the rectangular slide groove 102 limits the moving direction of the moving rod 9, and the moving rod 9 is horizontally moved and connected to the inner wall of the positioning seat 2, and the T-shaped rod 7 is fixedly connected to the moving rod 9. As the T-shaped rod 7 moves horizontally back and forth, the moving rod 9 can be synchronously moved horizontally back and forth along the inner wall of the rectangular slide groove 102 under the action of the T-shaped rod 7.

[0045] The n-shaped frame 10 is fixedly supported on the moving rod 9 through the n-shaped frame 10, and through the handle 11 and the circular hole plate 12 provided on the n-shaped frame 10, the patient first passes both hands through the inner wall of the circular hole plate 12 and grasps the handle 11 respectively. When the T-shaped rod 7 moves toward the direction close to the positioning seat 2 for knee flexion adjustment, the moving rod 9 drives the n-shaped frame 10 to move horizontally in the direction away from the positioning seat 2 under the action of the T-shaped rod 7, so that the handle 11 can stretch the patient's upper limbs to the top of the head, and the chest or abdominal area is fully exposed, which is conducive to the accurate irradiation of radiation and improves the effect of radiotherapy. Example

[0046] On the basis of the third embodiment, further:

[0047] The two circular orifice plates 12 are each provided with a plurality of evenly arranged rectangular through grooves 121, the inner wall of each of the rectangular through grooves 121 is movably connected with an L-shaped block 13, and one end of each of the L-shaped blocks 13 away from the circular orifice plate 12 is fixedly connected with an arc-shaped splint 14 for clamping the patient's arm, and the n-shaped frame 10 is provided with an auxiliary mechanism for driving the L-shaped block 13 and the arc-shaped splint 14 to retract or expand and reciprocate.

[0048] When in use, through the rectangular through groove 121 opened on the circular hole plate 12 and the L-shaped block 13 arranged on the rectangular through groove 121, the rectangular through groove 121 limits the moving direction of the L-shaped block 13, and the arc-shaped splint 14 arranged on the L-shaped block 13 is fixedly supported on the L-shaped block 13, and the auxiliary mechanism arranged on the n-shaped frame 10 can drive the L-shaped block 13 and the arc-shaped splint 14 to contract to clamp the patient's arm or expand to release the clamp of the patient's arm. Embodiment 4

[0049] On the basis of the fourth embodiment, further:

[0050] The auxiliary mechanism includes circular plates 15 rotatably connected to the circular orifice plates 12 on both sides of the n-shaped frame 10 through pin shafts, and arc-shaped through grooves 151 are provided at positions corresponding to the L-shaped blocks 13 on both sides of the circular plates 15. The inner wall of each of the arc-shaped through grooves 151 is movably connected to a movable rod 16 for pulling the L-shaped block 13 and the arc clamping plate 14 to retract or expand and reciprocate. One end of each of the movable rods 16 away from the circular plate 15 is fixedly connected to the L-shaped block 13 at the corresponding position, and the outer contours of the two circular plates 15 are fixedly connected to toothed rings 21. Movable grooves 111 are provided at symmetrical positions on both sides of the n-shaped frame 10, and the inner walls of the movable grooves 111 are movably connected to toothed plates 17 that mesh with the toothed ring 21 for transmission.

[0051] The radiotherapy bed 1 is fixedly connected with fixing rods 18 at symmetrical positions on both sides, and the two fixing rods 18 are fixedly connected with Z-shaped frames 19. The inner walls of the Z-shaped frames 19 on both sides are movably connected with sliders 20, and one end of the slider 20 on each side away from the Z-shaped frame 19 is fixedly connected to the tooth plate 17 on the adjacent side.

[0052] When in use, the circular plate 15 set on the n-shaped frame 10 is rotatably connected to the n-shaped frame 10 through a pin shaft. The arc-shaped through groove 151 opened on the circular plate 15 and the movable rod 16 set on the arc-shaped through groove 151 can support the position of the L-shaped block 13 under the action of the arc-shaped through groove 151. The movable groove 111 opened on the n-shaped frame 10 and the tooth plate 17 set on the movable groove 111 can limit the moving direction of the tooth plate 17. The tooth ring 21 set on the circular plate 15, the tooth plate 17 and the teeth on the tooth ring 21 are meshed with each other.

[0053] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, by the fixing rod 18 provided on the radiotherapy bed 1 and the Z-shaped frame 19 provided on the fixing rod 18, the fixing rod 18 can fix and support the Z-shaped frame 19 on the radiotherapy bed 1, and by the slider 20 provided on the Z-shaped frame 19, the Z-shaped frame 19 supports the movement of the slider 20, and the slider 20 is fixedly connected to the tooth plate 17. When the moving rod 9 drives the n-shaped frame 10 to move in a direction away from the positioning seat 2, the n-shaped frame 10 can drive the tooth plate 17 and the slider 20 to move synchronously. Movement can make the slider 20 pull the tooth plate 17 to move in the vertical direction close to the radiotherapy bed 1 under the action of the inclined surface of the Z-shaped frame 19, and the tooth ring 21 drives the circular plate 15 to rotate in the direction of B under the action of the tooth plate 17, so that the movable rod 16 pulls the L-shaped block 13 to retract and move under the action of the arc-shaped through groove 151, and at the same time, the arc-shaped splint 14 can clamp and limit the patient's wrist under the action of the L-shaped block 13, which can effectively fix the patient's upper limbs and prevent movement during radiotherapy. Embodiment 5

[0054] On the basis of the fifth embodiment, further:

[0055] An air bag 22 is fixedly connected to the inner wall of each arc-shaped clamping plate 14 , and a connecting pipe 26 is passed through and fixedly connected to each air bag 22 . An inflation mechanism for inflating and deflating the inside of the air bag 22 is provided on the circular hole plate 12 .

[0056] The inflation mechanism includes two circular orifice plates 12, the outer contours of which are fixedly connected to fixed blocks 23 at positions corresponding to the L-shaped blocks 13. A cylindrical shell 24 is fixedly connected to each of the fixed blocks 23, and the end of the connecting tube 26 away from the airbag 22 passes through the inner wall of the cylindrical shell 24 on the adjacent side and is fixedly connected. The inner wall of each cylindrical shell 24 is movably connected to a piston rod 25 for inflating and exhausting the inside of the airbag 22, and each end of the piston rod 25 away from the cylindrical shell 24 is fixedly connected to the L-shaped block 13 at the corresponding position.

[0057] When using, Figure 4 , Figure 7 , Figure 8 As shown, through the airbag 22 provided on the arc-shaped clamping plate 14 and the connecting tube 26 provided on the airbag 22, the airbag 22 is first fixedly supported on the inner wall of the arc-shaped clamping plate 14, and at the same time, the connecting tube 26 passes through the inner wall of the airbag 22 and is connected, through the fixing block 23 provided on the circular orifice plate 12, and the cylindrical shell 24 provided on the fixing block 23, the fixing block 23 fixes and supports the cylindrical shell 24 on the circular orifice plate 12, and through the piston rod 25 provided on the cylindrical shell 24, the piston rod 25 is axially moved and connected on the inner wall of the cylindrical shell 24, and the piston rod 25 is fixedly supported on the L-shaped block 13 On the upper side, the connecting tube 26 connects the airbag 22 with the cylindrical shell 24. When the L-shaped block 13 drives the arc splint 14 to contract and move to clamp the patient's wrist, the piston rod 25 moves toward the connecting tube 26 under the pull of the L-shaped block 13. At this time, the inner wall of the cylindrical shell 24 close to one end of the connecting tube 26 is in a positive pressure state, and then the connecting tube 26 can fill the gas inside the cylindrical shell 24 into the inside of the airbag 22, so that the airbag 22 can expand and clamp the patient's wrist, so that the airbag 22 can evenly distribute the pressure of the arc splint 14, further improving the patient's comfort.

[0058] It is further realized that the existing device can increase the overall stability by adjusting the patient's position during actual use, is easy to use, and is better than traditional products.

[0059] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limb restraint device for tumor radiotherapy, characterized in that: The invention comprises a radiotherapy bed (1) supported by an external bracket and placed on the ground, wherein a positioning seat (2) for positioning the patient's lower body is fixedly connected at two symmetrical positions on both sides of one end of the radiotherapy bed (1), and a connecting rod (3) for limiting the patient's thighs is rotatably connected to two symmetrical positions on both sides of the positioning seat (2) on each side through a pin shaft, and a first semicircular ring (4) for supporting the patient's thighs is fixedly connected to the opposite surfaces of the two connecting rods (3) on each side; One end of the connecting rod (3) away from the positioning seat (2) is rotatably connected to an adjustment rod (5) for limiting the position of the patient's lower leg on both sides through a pin, and a second semicircular ring (6) for supporting the patient's lower leg is fixedly connected to the opposite surface of the adjustment rod (5) on each side; The radiotherapy bed (1) is provided with an adjustment mechanism for adjusting the position of the patient's lower body; the adjustment mechanism comprises a limit groove (101) provided at one end of the radiotherapy bed (1) close to the second semicircular ring (6); the inner wall of the limit groove (101) is movably connected with a T-shaped rod (7) for pushing a connecting rod (3) and an adjustment rod (5) to adjust the patient's lower body to bend the knee, and each end of the adjustment rod (5) away from the first semicircular ring (4) is rotatably connected to the T-shaped rod (7) via a pin shaft; One end of the radiotherapy bed (1) close to the T-shaped rod (7) penetrates the inner wall of the limiting groove (101) and is rotatably connected to a threaded rod (8) driven to rotate by a power mechanism, and the T-shaped rod (7) is penetrated by the threaded rod (8) and is screwed, and the power mechanism is an electric motor after being energized; Rectangular slide grooves (102) are provided at symmetrical positions on both sides of the radiotherapy bed (1), and the inner walls of the rectangular slide grooves (102) on both sides are movably connected to moving rods (9) that can move back and forth horizontally, and the two ends of the T-shaped rod (7) are respectively fixedly connected to the moving rod (9) on the adjacent side, and the moving rod (9) is provided with a stretching mechanism for stretching the patient's arm; The stretching mechanism comprises two moving rods (9) whose ends away from the T-shaped rod (7) are fixedly connected to an n-shaped frame (10), handles (11) for patients to grasp are fixedly connected at symmetrical positions on both sides of the n-shaped frame (10), and circular orifice plates (12) are fixedly connected at positions on both sides of the n-shaped frame (10) corresponding to the handles (11) via external brackets; The two circular orifice plates (12) are each provided with a plurality of evenly arranged rectangular through grooves (121); the inner wall of each rectangular through groove (121) is movably connected to an L-shaped block (13); an end of each L-shaped block (13) away from the circular orifice plate (12) is fixedly connected to an arc-shaped splint (14) for clamping the patient's arm; and the n-shaped frame (10) is provided with an auxiliary mechanism for driving the L-shaped block (13) and the arc-shaped splint (14) to retract or expand and reciprocate; The auxiliary mechanism comprises circular plates (15) rotatably connected to the circular orifice plates (12) at positions corresponding to the circular orifice plates (12) on both sides of the n-shaped frame (10), arc-shaped through grooves (151) are provided at positions corresponding to the L-shaped blocks (13) on both sides of the circular plates (15), the inner wall of each of the arc-shaped through grooves (151) is movably connected to a movable rod (16) for pulling the L-shaped blocks (13) and the arc-shaped clamping plates (14) to retract or expand reciprocatingly, one end of each of the movable rods (16) away from the circular plates (15) is fixedly connected to the L-shaped blocks (13) at the corresponding positions, the outer contours of the two circular plates (15) are fixedly connected to toothed rings (21), movable grooves (111) are provided at symmetrical positions on both sides of the n-shaped frame (10), and the inner wall of the movable grooves (111) is movably connected to toothed plates (17) for meshing transmission with the toothed rings (21).

2. A limb restraint device for tumor radiotherapy according to claim 1, characterized in that: Fixed rods (18) are fixedly connected at symmetrical positions on both sides of the radiotherapy bed (1), and Z-shaped frames (19) are fixedly connected to the two fixed rods (18).

3. A limb restraint device for tumor radiotherapy according to claim 2, characterized in that: The inner walls of the Z-shaped frames (19) on both sides are movably connected with sliders (20), and one end of the slider (20) on each side away from the Z-shaped frame (19) is fixedly connected to the tooth plate (17) on the adjacent side.

4. A limb restraint device for tumor radiotherapy according to claim 3, characterized in that: The inner wall of each arc-shaped clamping plate (14) is fixedly connected to an air bag (22), and each air bag (22) is penetrated and fixedly connected to a connecting pipe (26).

5. The limb restraint device for tumor radiotherapy according to claim 4, characterized in that: The circular orifice plate (12) is provided with an inflation mechanism for inflating and exhausting air inside the air bag (22).

6. A limb restraint device for tumor radiotherapy according to claim 5, characterized in that: The inflation mechanism comprises two circular orifice plates (12) whose outer contours are fixedly connected to the L-shaped blocks (13) at positions corresponding to each other, each of the fixed blocks (23) being fixedly connected to a cylindrical shell (24), and the end of the connecting tube (26) away from the airbag (22) is passed through the inner wall of the adjacent cylindrical shell (24) and fixedly connected, the inner wall of each cylindrical shell (24) is movably connected to a piston rod (25) for inflating and exhausting the inside of the airbag (22), and the end of each piston rod (25) away from the cylindrical shell (24) is fixedly connected to the L-shaped block (13) at the corresponding position.

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