Fixing device for lower limb radiotherapy

Abstract

The utility model relates to a fixing device for lower limb radiotherapy. The device comprises a bottom plate and a thermoplastic film, two longitudinally-arranged sliding grooves are formed in the top face of the bottom plate, a sliding fixing mechanism is arranged on the sliding grooves, the sliding fixing mechanism comprises a sliding block, a support seat, a support plate, one or two sliding fixing bolts, an arc-shaped lifting plate, a lifting plate fixing handle and a lower limb bracket, the two sides of the sliding block are limited in the sliding grooves, and the support seat is arranged on the support plate. The support base is connected with the sliding block through the sliding fixing bolt. The tail end of the support seat is hinged to the tail end of the support plate, and the front portion of the support seat is hinged to the lower end of the arc-shaped lifting plate. A limiting sliding groove is formed in the bottom face of the support plate, a limiting block is arranged on one side of the limiting sliding groove, the upper edge of the arc-shaped lifting plate is located in the limiting sliding groove, an arc-shaped kidney-shaped hole is formed in the arc-shaped lifting plate, and one end of the lifting plate fixing handle penetrates through the arc-shaped kidney-shaped hole through a fixing pin to be connected with the limiting block.

Description

Technical Field

[0001] This utility model relates to a limb fixation device, and in particular discloses a fixation device for lower limbs used in radiotherapy. Background Technology

[0002] Currently, existing radiotherapy leg fixation structures mainly rely on vacuum pads to fix the affected limb. However, vacuum pads cannot completely enclose the leg, and after a period of treatment, varying degrees of air leakage and deformation can occur, making it easy for the leg to rotate and move back and forth within the vacuum pad. This results in ineffective fixation of the lower limb. Furthermore, due to limitations in the thickness of the vacuum pad, it is impossible to provide sufficient height support for the leg, causing both lower limbs to be almost on the same plane during fixation. This is not conducive to the distribution of the radiation field and avoiding healthy tissue. In addition, some patients have leg deformities that prevent them from straightening their legs, or internal or external rotation of the legs, making it impossible to create a vacuum pad for fixation. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a fixation device for lower limbs in radiotherapy that reduces positioning errors, facilitates the distribution of the radiation field, provides good fixation, and is comfortable to use.

[0004] This utility model is implemented as follows: A fixation device for lower limbs in radiotherapy includes a base plate and a thermoplastic film. The base plate has several fixing buckles near its two side edges for fixing the thermoplastic film. Two longitudinally arranged sliding grooves are provided on the longitudinal axis of the top surface of the base plate. A sliding fixing mechanism is provided on each sliding groove. The sliding fixing mechanism includes a slider, a support base, a support plate, one or two sliding fixing bolts, an arc-shaped lifting plate, a lifting plate fixing handle, and a lower limb support. The two sides of the slider are confined within the sliding grooves. The support base has a first through hole through which the sliding fixing bolts pass. The first through hole is connected to the first screw hole on the slider; the tail end of the bracket seat is hinged to the tail end of the bracket plate, and the front part of the bracket seat is hinged to the lower end of the arc-shaped lifting plate; the bottom surface of the bracket plate is provided with a limiting sliding groove, and a limiting block is provided on one side of the limiting sliding groove; the upper edge of the arc-shaped lifting plate is located in the limiting sliding groove; the arc-shaped lifting plate is provided with an arc-shaped waist hole; one end of the lifting plate fixing handle is provided with a fixing pin; the fixing pin passes through the arc-shaped waist hole and is threadedly connected to the limiting block; the lower limb bracket is fixed to the front top surface of the bracket plate.

[0005] The top of the slider is provided with an angle adjustment mechanism, which includes a semi-circular bracket. An angle scale is provided on the semi-circular bracket near the arc edge. A semi-circular arc groove is provided on the semi-circular bracket. A limiting rod is provided on the bottom front surface of the support base. The limiting rod is located in the semi-circular arc groove. A pointer or traction rod is provided at the front end of the support base. A second screw hole is provided on the semi-circular bracket and is integrated with the first screw hole. The lower part of the sliding fixing bolt is also connected to the second screw hole. The semi-circular bracket is located above the groove.

[0006] A disc-shaped dial is fixed around the upper end of the sliding fixing bolt.

[0007] The semi-circular bracket is a semi-circular transparent plate.

[0008] The lower limb support is semi-circular in shape, and the inner surface of the lower limb support is provided with a cushioning pad.

[0009] The groove has distance markings on one side.

[0010] The disc-shaped dial is surrounded by anti-slip protrusions.

[0011] The beneficial effects of this utility model are as follows: the lower limb support can effectively fix the lower limbs; the sliding fixing mechanism can slide or be fixed along the slide groove, realizing a comfortable and precise positioning tailored to each patient's actual condition, reducing positioning errors; through the cooperation of the arc-shaped lifting plate, the lifting plate fixing handle, the support base, and the support plate, the lower limb support can move up and down, thereby ensuring that the patient's two lower limbs are not on the same plane, which is beneficial to the distribution of the shooting field; the angle adjustment mechanism allows the lower limb support to rotate to both sides of the slide groove, further expanding the range of movement and angle, effectively solving the problem of large lower limb movement and inability to be properly fixed, and providing excellent comfort, customization, and repeatability. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the base plate and sliding fixing mechanism of this utility model.

[0013] Figure 2 This is a schematic diagram of the sliding fixing mechanism of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure when the base plate and the thermoplastic film of this utility model are connected.

[0015] Figure 4 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0016] Figure 5 This is a schematic diagram of the positional relationship between the sliding fixing mechanism and the slide groove in Embodiment 1 of this utility model.

[0017] Figure 6 This is a schematic diagram showing the side positional relationship between the sliding fixing mechanism and the slide groove in Embodiment 1 of this utility model.

[0018] The components include: 1. Base plate; 2. Thermoplastic film; 3. Fixing buckle; 4. Slide groove; 5. Slider; 6. Support base; 7. Support plate; 8. Sliding fixing bolt; 9. Arc-shaped lifting plate; 10. Lifting plate fixing handle; 11. Lower limb bracket; 12. First through hole; 13. First screw hole; 14. Limiting sliding groove; 15. Limiting block; 16. Arc-shaped waist hole; 17. Fixing pin; 18. Semi-circular bracket; 19. Limiting rod; 20. Semi-circular arc-shaped slide groove; 21. Angle scale; 22. Traction rod; 23. Second screw hole; 24. Buffer pad; 25. Distance scale; 26. Anti-slip protrusion; 27. Connecting ear plate; 28. Disc-shaped dial. Detailed Implementation

[0019] according to Figure 1-6 This utility model relates to a fixation device for lower limbs in radiotherapy, comprising a base plate 1 and a thermoplastic film 2. The base plate 1 has several fixing clips 3 near its two side edges for securing the thermoplastic film 2. Two longitudinally arranged sliding grooves 4 are provided on the longitudinal axis of the top surface of the base plate 1, and a sliding fixing mechanism is provided on each sliding groove 4. A distance scale 25 is provided on one side of each sliding groove 4, which is used to observe the sliding distance and position of the sliding fixing mechanism.

[0020] The sliding fixing mechanism includes a slider 5, a support base 6, a support plate 7, one or two sliding fixing bolts 8, an arc-shaped lifting plate 9, a lifting plate fixing handle 10, and a lower limb bracket 11. The two sides of the slider 5 are confined within the slide groove 4, and the slider 5 can slide back and forth along the slide groove 4. The support base 6 is provided with a first through hole 12, and the sliding fixing bolt 8 passes through the first through hole 12 and is connected to the first screw hole 13 on the slider 5. A disc-shaped dial 28 is fixed around the upper end of the sliding fixing bolt 8. The disc-shaped dial 28 is provided with anti-slip protrusions 26 around its perimeter. By turning and rotating the disc-shaped dial 28, the sliding fixing bolt 8 is tightened or loosened. When tightened, the support base 6 and the slider 5 are relatively fixed; when loosened, the support base 6 and the slider 5 can slide together along the slide groove 4.

[0021] The tail end of the support base 6 is hinged to the tail end of the support plate 7, and the front part of the support base 6 is hinged to the lower end of the arc-shaped lifting plate 9 through a connecting ear plate 27. The bottom surface of the support plate 7 is provided with a limiting sliding groove 14, and a limiting block 15 is provided on one side of the limiting sliding groove 14. The upper edge of the arc-shaped lifting plate 9 is located in the limiting sliding groove 14. The arc-shaped lifting plate 9 is provided with an arc-shaped waist hole 16, and one end of the lifting plate fixing handle 10 is provided with a fixing pin 17. The fixing pin 17 passes through the arc-shaped waist hole 16 and is threadedly connected to the limiting block 15. The lower limb bracket 11 is fixed to the front top surface of the support plate 7. The lower limb bracket 11 is semi-circular tube-shaped, and the inner surface of the lower limb bracket 11 is provided with a buffer pad 24.

[0022] The lifting plate fixing handle 10 tightens or loosens the fixing pin 17 and the limiting block 15 by rotating, so that the fixing pin 17 is fixed relative to the arc-shaped lifting plate 9, or the fixing pin 17 can slide within the arc-shaped waist hole 16. By sliding the fixing pin 17 within the arc-shaped waist hole 16, the arc-shaped lifting plate 9, the support plate 7, and the support base 6 are linked together, and the upper end of the support plate 7 moves up and down, thereby enabling the lower limb support 11 to complete the lifting movement.

[0023] The present invention will be further described below with reference to specific embodiments. Example 1:

[0024] according to Figure 4-6 This embodiment also includes an angle adjustment mechanism disposed on the top of the slider 5. The angle adjustment mechanism includes a semi-circular bracket 18, on which an angle scale 21 is provided near the arc-shaped edge. The semi-circular bracket 18 is a semi-circular transparent plate. The semi-circular bracket 18 is provided with a semi-circular arc-shaped slide groove 20. The bottom front surface of the support base 6 is provided with a limiting rod 19, which is located within the semi-circular arc-shaped slide groove 20. The front end of the support base 6 is provided with a pointer or traction rod 22. The semi-circular bracket 18 is provided with a second screw hole 23 that is integrally connected to the first screw hole 13. The lower part of the sliding fixing bolt 8 is also connected to the second screw hole 23. The semi-circular bracket 18 is located above the slide groove 4.

[0025] This invention effectively fixes the patient's lower limbs using the lower limb support 11. The sliding fixation mechanism can slide back and forth along the slide groove 4 or be fixed by the sliding fixing bolt 8, achieving a comfortable and precise positioning tailored to each patient's actual condition and reducing positioning errors. Through the cooperation of the arc-shaped lifting plate 9, the lifting plate fixing handle 10, the support base 6, and the support plate 7, the lower limb support 11 can move up and down, thus ensuring that the patient's two lower limbs are not on the same plane, which is beneficial for the distribution of the firing field. The angle adjustment mechanism allows the lower limb support 11 to rotate to both sides of the slide groove 4, further expanding the range of movement and angle.

Claims

1. A fixing device for radiotherapy of lower limbs, comprising a bottom plate (1) and a thermoplastic film (2), a plurality of fixing buckles (3) for fixing the thermoplastic film (2) are arranged on the bottom plate (1) near the two side edges, characterized in that: The longitudinal axis of the top surface of the bottom plate (1) is provided with two longitudinally arranged sliding grooves (4), the sliding grooves (4) are provided with a sliding fixing mechanism, the sliding fixing mechanism comprises a sliding block (5), a bracket seat (6), a bracket plate (7), one or two sliding fixing bolts (8), an arc-shaped lifting plate (9), a lifting plate fixing handle (10) and a lower limb bracket (11), the two sides of the sliding block (5) are limited in the sliding groove (4), the bracket seat (6) is provided with a first through hole (12), the sliding fixing bolt (8) is connected with the first screw hole (13) on the sliding block (5) after penetrating through the first through hole (12); the tail end of the bracket seat (6) is hinged with the tail end of the bracket plate (7), the front part of the bracket seat (6) is hinged with the lower end of the arc-shaped lifting plate (9); the bottom surface of the bracket plate (7) is provided with a limiting sliding groove (14), one side of the limiting sliding groove (14) is provided with a limiting block (15), the upper edge of the arc-shaped lifting plate (9) is located in the limiting sliding groove (14), the arc-shaped lifting plate (9) is provided with an arc-shaped waist hole (16), one end of the lifting plate fixing handle (10) is provided with a fixed pin (17), the fixed pin (17) is threadedly connected with the limiting block (15) after penetrating through the arc-shaped waist hole (16); the lower limb bracket (11) is fixed on the top surface of the front part of the bracket plate (7).

2. The fixing device for radiotherapy lower limbs according to claim 1, characterized in that: The top of the sliding block (5) is provided with an angle adjusting mechanism, the angle adjusting mechanism comprises a semicircular bracket (18), the semicircular bracket (18) is provided with an angle scale (21) near the arc-shaped edge, the semicircular bracket (18) is provided with a semicircular sliding groove (20), the front bottom surface of the bracket seat (6) is provided with a limiting rod (19), the limiting rod (19) is located in the semicircular sliding groove (20), the front end of the bracket seat (6) is provided with a pointer or a traction rod (22), the semicircular bracket (18) is provided with a second screw hole (23) which is connected with the first screw hole (13) as a whole, the lower part of the sliding fixing bolt (8) is also connected with the second screw hole (23); the semicircular bracket (18) is located above the sliding groove (4).

3. The fixing device for radiotherapy lower limbs according to claim 1 or 2, characterized in that: The upper end of the sliding fixing bolt (8) is fixed with a disc type dial (28) around.

4. The fixing device for radiotherapy lower limbs of claim 2, characterized in that: The semicircular bracket (18) is a semicircular transparent plate.

5. The fixing device for radiotherapy lower limbs of claim 1, wherein: The lower limb bracket (11) is a semicircular pipe, the inner surface of the lower limb bracket (11) is provided with a buffer pad (24).

6. The fixing device for radiotherapy lower limbs of claim 1, characterized in that: One side of the sliding groove (4) is provided with a distance scale (25).

7. The fixing device for radiotherapy lower limbs of claim 3, characterized in that: The disc type dial (28) is provided with anti-skid protrusions (26) around.

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