Adjustable radiotherapy leg rotation fixture
By designing an adjustable leg rotation fixation device for radiotherapy, the problem of the inability to fix the rotation angle of lower limb tumor patients has been solved, which improves the accuracy and comfort of the patient's position during radiotherapy and ensures the repeatability and practicality of the treatment effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE PEOPLES HOSPITAL OF GUANGXI ZHUANG AUTONOMOUS REGION
- Filing Date
- 2025-03-05
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, the rotation angle of patients with lower limb tumors cannot be effectively fixed during radiotherapy, resulting in large deviations in the rotation angle and affecting the repeatability and accuracy of treatment.
An adjustable leg rotation fixation device for radiotherapy was designed, comprising components such as a base plate, clamping plate, moving plate, shell, slider, limiting plate, support plate, threaded sleeve, and pressure plate. Through the cooperation of the support plate and clamping plate, the slider moves in the groove to adjust the rotation angle of the patient's lower limb, and is fixed by threaded self-locking to achieve arbitrary angle adjustment and locking.
It improves the accuracy and comfort of patient positioning during radiotherapy, ensures the repeatability and practicality of treatment effects, and adapts to the needs of patients of different body types.
Smart Images
Figure CN224484734U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of cancer treatment auxiliary equipment, and specifically relates to an adjustable leg rotation fixation device for radiotherapy. Background Technology
[0002] Radiotherapy, as one of the three major treatment methods for malignant tumors, is playing an increasingly prominent role and holding a prominent position. Currently, tumor radiotherapy has entered the era of precision treatment, and ensuring the accuracy and repeatability of tumor location is crucial for the precise implementation of radiotherapy plans. In clinical practice, the fixation method for lower limb tumors (leg tumors) during radiotherapy often involves vacuum pad fixation or thermoplastic membrane fixation. However, the fixation of lower limb tumors is limited by the uncertainty of the patient's rotation angle. Each radiotherapy session cannot effectively fix the patient's rotation angle, resulting in significant deviations. This not only affects the repeatability and accuracy of the actual treatment position but also the final therapeutic effect of radiotherapy.
[0003] Therefore, there is a need for an adjustable rotation fixation device for the leg during radiotherapy. Utility Model Content
[0004] The purpose of this invention is to provide an adjustable leg rotation fixation device for radiotherapy, addressing the problem of unstable leg rotation in some lower limb tumor patients undergoing radiotherapy. The specific technical solution is as follows:
[0005] An adjustable leg rotation fixation device for radiotherapy includes a base plate, a clamping plate, a movable plate, a housing, a slider, a limiting plate, a support plate, a threaded sleeve, a pressure plate, a first push rod, a first rotating handle, and a distance adjustment unit. The distance adjustment unit is mounted on the base plate and is used to adjust the distance between the movable plates. The movable plates are symmetrically mounted at both ends of the distance adjustment unit.
[0006] The housing is mounted on a movable plate. An arc-shaped groove is provided on the housing. The slider is slidably mounted in the groove. The limiting plate is mounted on the slider and located inside the housing. The support plate is mounted on the slider. The clamping plate is mounted at both ends of the support plate. One end of the threaded sleeve is connected to the side of the housing away from the groove. The threaded sleeve communicates with the inside of the housing. The first push rod is rotatably connected to the threaded sleeve by a thread. The pressure plate is mounted on one end of the first push rod and located inside the housing. The first rotating handle is mounted on the other end of the first push rod.
[0007] Preferably, the slider is arc-shaped and has the same radius as the groove, and the central angle of the groove is 90 degrees.
[0008] Preferably, the side of the pressure plate and the limiting plate that are close to each other is covered with a rubber pad to increase friction.
[0009] Preferably, the movable plate has an arc-shaped groove for placing the heel of the leg, and the arc-shaped groove is located at the center of the slide groove.
[0010] Preferably, the distance adjustment unit includes a bidirectional lead screw, a second rotating handle, a moving part, and a mounting frame. The mounting frame is mounted on a base plate, the bidirectional lead screw is rotatably mounted on the mounting frame, the moving part is symmetrically mounted at both ends of the bidirectional lead screw, the mounting frame has through holes, the moving part passes through the through holes and connects to a moving plate, and the second rotating handle is mounted at one end of the bidirectional lead screw.
[0011] Preferably, a width adjustment unit is installed inside the support plate. The width adjustment unit includes a gear, a rack, a ratchet, a pawl, a second push rod, a first torsion spring, and a second torsion spring. A movable cavity is formed inside the support plate. The gear is rotatably mounted in the movable cavity via the first torsion spring. One end of the rack is connected to a clamping plate. The rack is slidably mounted in the movable cavity and meshes with the gear. The two racks are symmetrically arranged about the gear. The ratchet is mounted on the gear and is coaxial with the gear. The pawl is rotatably mounted on the inner side wall of the movable cavity via the second torsion spring. Under the action of the first torsion spring, the pawl contacts the ratchet. The second push rod is installed on the top of the support plate and one end passes through the support plate and is connected to the pawl.
[0012] Preferably, the clamping plate is a telescopic plate, and the side wall of the clamping plate is equipped with a buckle to release the telescopic plate from locking.
[0013] Preferably, the working surface of the clamping plate and the arc-shaped groove are covered with a soft material.
[0014] Preferably, the housing is provided with angle scale lines for reference.
[0015] Compared with existing technologies, this utility model has the following beneficial effects:
[0016] 1. This utility model uses a support plate and a clamp plate in combination. The clamp plate is used to fix the patient's feet, and the support plate moves along the slide groove via a slider to adjust the rotation angle of the patient's lower limbs, thereby improving the accuracy of the radiotherapy site during each treatment and ensuring the patient's final treatment effect.
[0017] 2. This utility model uses a pressure plate to press and limit the limiting plate to fix and lock the support plate, and uses the thread self-locking between the first push rod and the threaded sleeve to prevent loosening. Therefore, the support plate can be moved to any position, and the angle of the patient's lower limb can be adjusted at any angle, which improves its practicality.
[0018] 3. This utility model uses a distance adjustment unit to move the moving plates closer or further apart, thereby adjusting the angle of the patient's legs to a comfortable posture and improving the patient's comfort during treatment. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Figure 2 This is the front view of this utility model.
[0022] Figure 3 This is a rear view of the present invention.
[0023] Figure 4 This is a top view of the present invention.
[0024] Figure 5 This is a schematic diagram of the overall structure of the support plate of this utility model.
[0025] Figure 6 This is a schematic diagram of the internal structure of the support plate of this utility model.
[0026] Explanation of key figure labels:
[0027] 1. Base plate; 2. Clamping plate; 3. Moving plate; 4. Housing; 5. Distance adjustment unit; 51. Two-way lead screw; 52. Second rotating handle; 53. Moving part; 54. Mounting bracket; 6. Slider; 7. Limiting plate; 8. Support plate; 9. Width adjustment unit; 91. Gear; 92. Rack; 93. Ratchet; 94. Pawl; 95. Second push rod; 10. Threaded sleeve; 11. Pressure plate; 12. First push rod; 13. First rotating handle; 14. Slide groove; 15. Arc-shaped groove; 16. Buckle; 17. Pin. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Next, refer to Figures 1 to 6 The working principle of this embodiment will be described in detail so that those skilled in the art can better understand this utility model:
[0030] The housing 4 is bolted to the movable plate 3. An arc-shaped groove 14 is formed on the housing 4, and the slider 6 is slidably mounted within the groove 14. A limiting plate 7 is bolted to the slider 6 and located inside the housing 4. A support plate 8 is bolted to the slider 6. Both the limiting plate 7 and the support plate 8 are in contact with the housing 4, ensuring that the slider 6 cannot detach from the groove 14. Clamping plates 2 are installed at both ends of the support plate 8 to fix the patient's feet, improving the accuracy of the radiotherapy site during each treatment and ensuring the final treatment effect. One end of a threaded sleeve 10 is bonded to the side of the housing 4 away from the groove 14. The threaded sleeve 10 communicates with the interior of the housing 4. The first push rod 12 is rotatably connected to the threaded sleeve 10 via a thread. A pressure plate 11 is installed at one end of the first push rod 12 and located inside the housing 4. A first rotating handle 13 is installed at the other end of the first push rod 12. Rotating the first rotating handle 13 drives the first push rod 12 to rotate, thereby moving the pressure plate 11 within the housing 4. When the pressure plate 11 contacts and rubs against the limiting plate 7, the slider 6 is fixed and cannot move. Simultaneously, the first push rod 12 and the threaded sleeve 10 are self-locking via threads to prevent loosening. When the pressure plate 11 separates from the limiting plate 7, the slider 6 can be adjusted arbitrarily on the slide groove 14. Therefore, the support plate 8 can be moved to any position, allowing for arbitrary angle adjustment of the patient's lower limbs, improving practicality. The movable plates 3 are symmetrically installed at both ends of the distance adjustment unit 5 to adjust the distance between the movable plates 3.
[0031] The slider 6 is arc-shaped and has the same radius as the groove 14. Compared to a circular slider 6, it avoids jamming and prevents the support plate 8 from rotating, allowing medical staff to quickly adjust the support plate 8. When a patient lies down, their legs are normally rotated outwards, so the central angle of the groove 14 is 90 degrees. Furthermore, when the two housings 4 are in contact, the grooves 14 on the two housings 4 can form a semicircle.
[0032] The side of the pressure plate 11 and the limiting plate 7 that are close to each other is covered with a rubber pad to increase friction and enhance the fixation of the limiting plate 7. The movable plate 3 has an arc-shaped groove 15 for placing the heel of the leg. The arc-shaped groove 15 is located at the center of the slide groove 14, which can provide a more comfortable contact for the patient's heel and avoid discomfort caused by pressure on the heel due to prolonged treatment.
[0033] Mounting bracket 54 is bolted to base plate 1, and bidirectional lead screw 51 is rotatably mounted on mounting bracket 54. Moving parts 53 are symmetrically mounted at both ends of bidirectional lead screw 51. Through holes are provided on mounting bracket 54, through which the moving parts 53 pass and connect to moving plate 3. A second rotating handle 52 is mounted at one end of bidirectional lead screw 51. When the second rotating handle 52 is rotated, the moving parts 53 move closer or further apart along bidirectional lead screw 51, thereby adjusting the angle of the patient's legs to a comfortable posture and improving patient comfort during treatment. Pins for fixing the base plate to the treatment bed are installed at each of the four corners of the base plate 1. These, along with positioning holes on the treatment bed, allow for arbitrary adjustment of the base plate's position to adapt to different situations.
[0034] A width adjustment unit 9 is installed inside the support plate 8. The width adjustment unit 9 includes a gear 91, a rack 92, a ratchet 93, a pawl 94, a second push rod 95, a first torsion spring, and a second torsion spring. A movable cavity is formed inside the support plate 8. The gear 91 is rotatably mounted inside the movable cavity via the first torsion spring. One end of the rack 92 is connected to the clamping plate 2. The rack 92 is slidably mounted inside the movable cavity and meshes with the gear 91. The two racks 92 are symmetrically arranged about the gear 91, allowing the clamping plates 2 to slide and adjust the width. The ratchet 93 is mounted on the gear 91 and is coaxial with the gear 91. The pawl 94 is rotatably mounted on the inner wall of the movable cavity via the second torsion spring. Under the action of the first torsion spring, the pawl 94 contacts the ratchet 93. The second push rod 95 is installed on the top of the support plate 8, with one end penetrating the support plate 8 and connecting to the pawl 94.
[0035] When medical staff adjust the width of splint 2, they can loosen and pull it. Splint 2 will move rack 92, which in turn drives gear 91 and ratchet 93 to rotate. At this time, the first torsion spring is compressed. After the medical staff completes the adjustment, pawl 94 will obstruct ratchet 93, thus preventing gear 91 from rotating under the action of the first torsion spring. This completes the adjustment and fixation. When the medical staff needs to return splint 2 to its initial state, they can press down the second push rod 95. The second push rod 95 pushes pawl 94 away from ratchet 93, and gear 91 rotates under the action of the first torsion spring, moving rack 92 and splint 2 to their initial state. Then, releasing the second push rod 95 will allow pawl 94 and the second push rod 95 to return to their initial state under the action of the second torsion spring. By adjusting the width between splints 2, this application can be used for patients with different body types, improving its practicality.
[0036] The splint 2 is a telescopic splint, and its side wall is equipped with a buckle 16 to release the telescopic splint's lock. For patients with shorter legs, the splint 2 can be extended for use. The working surface and the arc-shaped groove 15 of the splint 2 are covered with soft materials, such as cotton cloth and latex, to provide patients with a more comfortable contact experience. The housing 4 is equipped with angle scale lines for reference, allowing medical staff to quickly adjust and record the angles.
[0037] In summary, when using this application, it can be placed on the treatment bed first, and then the patient can lie down on the treatment bed. Medical staff can then rotate the second rotating handle 52 to coarsely adjust the position of the moving plate 3, adjust the width of the clamp 2 to place the patient's feet between the clamps 2, and adjust the rotation angle of the patient's legs according to the patient's condition. After reaching a suitable angle, rotate the first rotating handle 13 to fix the slider 6, and record the angle for future use. Continue adjusting the distance of the moving plate 3 to a suitable level, and then radiotherapy can begin.
[0038] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. An adjustable leg rotation fixation device for radiotherapy, characterized in that, It includes a base plate (1), a clamping plate (2), a moving plate (3), a housing (4), a slider (6), a limiting plate (7), a support plate (8), a threaded sleeve (10), a pressure plate (11), a first push rod (12), a first rotating handle (13), and a distance adjustment unit (5). The distance adjustment unit (5) is installed on the base plate (1) and is used to adjust the distance between the moving plates (3). The moving plates (3) are symmetrically installed at both ends of the distance adjustment unit (5). The housing (4) is mounted on the movable plate (3). The housing (4) has an arc-shaped groove (14). The slider (6) is slidably mounted in the groove (14). The limiting plate (7) is mounted on the slider (6) and located inside the housing (4). The support plate (8) is mounted on the slider (6). The clamping plate (2) is mounted on both ends of the support plate (8). One end of the threaded sleeve (10) is connected to the side of the housing (4) away from the groove (14). The threaded sleeve (10) communicates with the inside of the housing (4). The first push rod (12) is connected to the threaded sleeve (10) by a threaded rotation. The pressure plate (11) is mounted on one end of the first push rod (12) and located inside the housing (4). The first rotating handle (13) is mounted on the other end of the first push rod (12).
2. The adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The slider (6) is arc-shaped and has the same radius as the groove (14), and the central angle of the groove (14) is 90 degrees.
3. The adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The side of the pressure plate (11) and the limiting plate (7) that are close to each other is covered with a rubber pad to increase friction.
4. The adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The movable plate (3) has an arc-shaped groove (15) for placing the heel of the leg, and the arc-shaped groove (15) is located at the center of the slide groove (14).
5. An adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The distance adjustment unit (5) includes a bidirectional lead screw (51), a second rotating handle (52), a moving part (53), and a mounting frame (54). The mounting frame (54) is mounted on the base plate (1). The bidirectional lead screw (51) is rotatably mounted on the mounting frame (54). The moving part (53) is symmetrically mounted at both ends of the bidirectional lead screw (51). The mounting frame (54) has through holes. The moving part (53) passes through the through holes and is connected to the moving plate (3). The second rotating handle (52) is mounted on one end of the bidirectional lead screw (51).
6. The adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The support plate (8) is equipped with a width adjustment unit (9). The width adjustment unit (9) includes a gear (91), a rack (92), a ratchet (93), a pawl (94), a second push rod (95), a first torsion spring, and a second torsion spring. The support plate (8) has a movable cavity. The gear (91) is rotatably installed in the movable cavity through the first torsion spring. One end of the rack (92) is connected to the clamping plate (2). The rack (92) is slidably installed in the movable cavity and meshes with the gear (91). The two racks (92) are symmetrically arranged about the gear (91). The ratchet (93) is installed on the gear (91) and is coaxial with the gear (91). The pawl (94) is rotatably installed on the inner side wall of the movable cavity through the second torsion spring. Under the action of the first torsion spring, the pawl (94) contacts the ratchet (93). The second push rod (95) is installed on the top of the support plate (8) and one end passes through the support plate (8) and is connected to the pawl (94).
7. An adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The clamp (2) is a telescopic plate, and the side wall of the clamp (2) is equipped with a buckle (16) to release the telescopic plate from locking.
8. An adjustable leg rotation fixation device for radiotherapy according to claim 4, characterized in that, The working surface of the clamp (2) and the arc-shaped groove (15) are covered with a soft material.
9. An adjustable leg rotation fixation device for radiotherapy according to claim 1, characterized in that, The housing (4) is provided with angle scale lines for reference.