CN111494811A - Leg and foot immobilizer and radiotherapy immobilizer for lower extremity tumor radiotherapy - Google Patents

Abstract

The invention relates to a foot fixer for lower limb tumor radiotherapy and a radiotherapy fixing table. The first turnover plate is arranged in the rectangular through hole of the base plate, the first turnover plate is hinged with the base plate through a first rotating shaft, the first rotating shaft penetrates through the middle part of the first turnover plate, and two ends of the first rotating shaft extend out of the first turnover plate and are fixedly connected with the base plate; the first turnover plate is divided into an operation foot placing area and a non-operation foot placing area along the two sides of the first rotating shaft, a second turnover plate is arranged in a rectangular through hole of the operation foot placing area, and a third turnover plate is arranged in a rectangular through hole of the non-operation foot placing area. The leg and foot fixer and the radiotherapy fixing table can realize the quick and easy exchange of the operative foot fixer and the non-operative foot fixer, and reduce the work burden of medical staff.

Description

Leg and foot immobilizer and radiotherapy immobilizer for lower extremity tumor radiotherapy

technical field

The invention relates to the technical field of medical auxiliary devices, in particular to a leg and foot fixer and a radiotherapy fixation table for lower extremity tumor radiotherapy.

Background technique

For leg soft tissue tumors, due to the loose muscle tissue of the leg, the tumor is easy to expand and grow or spread along the interstitial space, resulting in the metastasis of tumor cells; for diseases such as bone tumors, tumor cells can invade other functions through blood circulation, lymphatic system, etc. Therefore, for the treatment of such tumors, the basic mode of surgical resection and radiotherapy is often adopted in clinical practice.

Radiotherapy is a method of using radiation to act on tumor cells to inactivate tumor cells to treat tumors. For patients who have undergone surgical resection of tumor lesions, since surgery cannot completely remove tumor cells, external radiation therapy is used to perform radiation therapy on the lesion site and its surrounding tissues with a certain dose, range and time, in order to completely kill tumor cells. Prevent tumor recurrence.

In the process of radiotherapy treatment, the more important point is the stability of the body. This factor is an important factor for the effect of radiotherapy. In the previous treatment of lower extremity radiotherapy, there was no particularly effective fixation measures, so the irradiation field was too large. , the irradiation area is unstable, resulting in unsatisfactory radiotherapy treatment effect, and in the process of radiotherapy, patients deliberately maintain stability, which leads to muscle soreness and other fatigue for a long time. At the same time, it increases the difficulty of medical workers. , aggravating the patient's discomfort.

The Chinese Patent Publication No. CN110812715A discloses a medical external radiotherapy lower extremity immobilizer. When performing external radiotherapy on the lower extremities of the patient, the leg to be treated by the patient is placed on the leg support device, and the patient's feet are clamped. By adjusting the angle between the angle adjustment plate and the base and the rotation direction of the foot fixing assembly, the patient's lower limbs can be kept at the angle that needs to be maintained during treatment, thereby reducing the The difficulty of the medical worker, the position of the foot immobilization device and the leg support device can be adjusted according to the position of the left and right legs of the person. However, when the fixing device is adjusted according to different operating legs, it needs to be adjusted separately, and the adjustment method is cumbersome, which increases the workload of medical staff.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the deficiencies of the above-mentioned technical problems, and to provide a leg and foot immobilizer and a radiotherapy immobilization table for lower extremity tumor radiotherapy, which can realize the quick and easy exchange of the surgical foot immobilizer and the non-operative foot immobilizer, and reduce the need for medical treatment. Workload of personnel.

In order to solve the deficiencies of the above technical problems, the present invention adopts a technical scheme as follows: a foot fixator for lower extremity tumor radiotherapy, comprising a base plate, a first inversion plate, a second inversion plate, a third inversion plate, a surgical foot Fixing components and non-surgical foot fixing components;

the base plate has a rectangular through hole;

The first turning plate is arranged in the rectangular through hole of the base plate. The first turning plate is hinged with the base plate through a first rotating shaft. The first rotating shaft is arranged through the middle of the first turning plate. The board protrudes and is fixedly connected with the base plate;

The first turning plate is divided into a surgical foot placement area and a non-operative foot placement area along both sides of the first rotation axis. The surgical foot placement area and the non-operative foot placement area are respectively provided with rectangular through holes. A second turning plate is arranged in the through hole, the second turning plate is hinged with the first turning plate through a second rotating shaft, and the second rotating shaft is fixedly penetrated in the middle of the second turning plate; There is a third turning plate, the third turning plate is hinged with the first turning plate through a third rotating shaft, and the third rotating shaft is arranged in the middle of the third turning plate;

The axes of the second rotating shaft and the third rotating shaft are coincidently arranged, the first rotating shaft is fixedly sleeved with a first bevel gear, one end of the second rotating shaft is fixedly sleeved with a second bevel gear, and one end of the third rotating shaft is fixedly sleeved with a second bevel gear. The third bevel gear is meshed with the second bevel gear and the third bevel gear respectively.

As a further optimization of the foot immobilizer for lower extremity tumor radiotherapy of the present invention, a gear avoidance hole is provided in the middle of the first turning plate, and the first bevel gear, the second bevel gear and the third bevel gear are all located in the gear In the avoidance hole, a protective cover is arranged at the gear avoidance hole.

As a further optimization of a foot immobilizer for lower extremity tumor radiotherapy of the present invention: the surgical foot immobilization component includes a base, a lifting rod and a limit frame, the base and the limit frame are both U-shaped structures, and the lower end of the lifting rod Fixed on the second flip plate, the opening of the base is fixed upward on the top of the lifting rod, the opening of the limit frame is set downward, one end of the limit frame is hinged with one end of the base through a pin shaft, and the other end of the limit frame is clamped The buckle is movably connected with the other end of the base.

As a further optimization of a foot fixer for lower extremity tumor radiotherapy of the present invention, a soft pad is arranged inside the base, a threaded hole is arranged on the horizontal part of the limiter, and a top is screwed in the threaded hole. Tighten the screw, the top of the top screw is connected with a manual knob, the bottom of the top screw is connected with a pressing block, the upper end face of the pressing block is provided with a blind hole, the blind hole is provided with a bearing, and the outer ring of the bearing is fixed in the blind. In the hole, the bottom end of the jacking screw is fixedly connected with the inner ring of the bearing.

As a further optimization of a foot immobilizer for lower extremity tumor radiotherapy of the present invention, the inner sides of the two vertical parts of the limiting frame are respectively provided with sliding grooves, and the two sides of the pressing block are respectively provided with sliding grooves that can be snapped into Slot flanks.

As a further optimization of a foot immobilizer for lower extremity tumor radiotherapy of the present invention, the lower end surface of the pressing block is provided with a soft pad.

As a further optimization of a foot immobilizer for lower extremity tumor radiotherapy according to the present invention: the non-surgical foot immobilization assembly includes a foot brace and a first sliding rail, the first sliding rail is arranged on the third turning plate, and the first sliding rail is The sliding rail and the third rotating shaft are arranged parallel to each other, the foot bracket is composed of a U-shaped bracket and a support rod, the U-shaped bracket is slidably connected to the first sliding rail through the support rod, and the opening of the U-shaped bracket is arranged upward.

As a further optimization of a foot immobilizer for lower extremity tumor radiotherapy of the present invention, one end of the first turning plate along the length direction is provided with a limiting piece, and two sides of the base plate located in the length direction of the rectangular through hole are respectively provided with The blind hole can be embedded in the limit piece, one side of the blind hole is provided with a blocking piece through the pin shaft, and the blind hole is located below the movement track of the blocking piece.

A fixation table for lower extremity tumor radiotherapy, comprising a fixation table body, an operating leg fixer and the above-mentioned foot fixer;

The fixing table body includes a lower body support part and an upper body support part hinged to each other;

The foot holder is connected to the tail end of the lower body support part of the fixing table body through its base plate, the lower body support part of the fixing table body is provided with a blind hole, and the blind hole is provided with a first slide rail parallel to each other. Two slide rails;

The surgical leg fixer includes a bottom plate, an adjustment plate and a leg support block, the bottom plate is slidably arranged on the second slide rail, the bottom plate is provided with a third slide rail perpendicular to the second slide rail, and the adjustment plate is slidably arranged On the third slide rail, the leg support block is fixedly arranged on the upper end face of the adjusting plate;

The blind hole of the fixing table body is provided with an elongated through hole on one side of the first slide rail, the lower end of the bottom plate is provided with a rack along its length direction, and the rack is arranged through the elongated through hole;

The end of the first rotating shaft facing the fixing table body is connected with the base plate through a bearing, the side wall of the base plate is provided with a through hole, a bearing is rotatably arranged in the through hole, and the end of the first rotating shaft is placed on the inner ring of the bearing and is connected with the inner ring. The ring is fixedly connected, the inner end of the bearing outer ring is connected with the first turning plate through a sleeve, the sleeve is sleeved outside the first rotating shaft, and the outer end of the bearing outer ring is fixedly connected with a coupling rod coaxial with the first rotating shaft, One end of the coupling rod is fixedly connected with the outer ring of the bearing, and the other end of the coupling rod is sleeved with a gear connected with the rack.

As a further optimization of the fixed table for lower extremity tumor radiotherapy of the present invention, the gear is connected to the rack through a gear box, and the input end and the output end of the gear box are respectively meshed with the gear and the rack.

As a further optimization of the present invention, a fixed table for lower extremity tumor radiotherapy: the upper end surface of the leg support block is provided with a leg accommodating groove, the bottom of the leg accommodating groove is laid with a flexible pad, and both sides of the leg accommodating groove are provided with a flexible pad. Provided with leg fixing straps.

As a further optimization of a fixed table for lower extremity tumor radiotherapy of the present invention, one side of the adjusting plate is provided with a locking block, and the lower end surface of the locking block is flush with the lower end surface of the leg support block, and the locking block is The block is provided with a threaded through hole penetrating the locking block from top to bottom, a locking screw is screwed in the threaded through hole, and the length of the locking screw is greater than the depth of the threaded through hole.

The leg and foot immobilizer and the radiotherapy immobilizer of the present invention have the following beneficial effects:

1. The leg and foot fixator of the present invention includes a surgical foot fixing component and a non-operative foot fixing component, which can realize the mandatory fixation of the surgical foot and the flexible fixation of the non-operative foot, and the positions of the surgical foot fixing component and the non-operative foot fixing component can be adjusted. Adjust according to the different surgical legs of the patient. The adjustment process is very convenient. It only needs to flip the first flipping board. During the flipping process of the first flipping board, the fixed component of the surgical foot and the fixed component of the non-operated foot can be flipped synchronously. , that is, the "one-key" position adjustment of the surgical foot fixing component and the non-operative foot fixing component is realized;

2. The limb tumor radiotherapy fixation table of the present invention has a surgical leg fixer used in conjunction with the surgical foot fixation assembly, which can further fix the surgical leg of a patient who needs radiotherapy, and the surgical leg fixer can be turned over with the first The plate is turned over and the position is adjusted at the same time, which realizes the "one-key" position adjustment of the three functional components of the surgical foot fixation component, the surgical leg fixer, and the non-surgical foot fixation component.

Instruction drawings

Figure 1 is a schematic structural diagram of the radiotherapy fixed table of the present invention in the first working position (the patient's operating leg is the right leg);

2 is a schematic structural diagram of the radiotherapy fixed table of the present invention in the process of adjustment;

Figure 3 is a schematic structural diagram of the radiotherapy fixed table of the present invention in the second working position (the patient's operating leg is the left leg);

Fig. 4 is the structural representation of the leg anchor of the present invention;

5 is a schematic structural diagram of a fixing table body and an operating leg fixer according to the present invention;

6 is a schematic diagram of the positional relationship of a coupling rod, a gear, a gear box and a rack of the present invention;

FIG. 7 is a schematic structural diagram of the foot fixing assembly of the present invention;

8 is a schematic structural diagram of a non-operative foot fixing assembly of the present invention;

9 is a schematic diagram of the positional relationship between the blocking piece and the limiting piece of the present invention;

10 is a schematic diagram of the positional relationship between the locking block and the locking screw of the present invention;

Labels in the figure: 1, base plate, 2, first turning plate, 3, second turning plate, 4, third turning plate, 5, first rotating shaft, 6, second rotating shaft, 7, third rotating shaft, 8, No. Three bevel gears, 9, the first bevel gear, 10, the second bevel gear, 11, the gear avoidance hole, 12, the base, 13, the lifting rod, 14, the limit frame, 15, the top tightening screw, 16, the pressing block , 17, foot bracket, 18, first slide rail, 19, limit piece, 20, baffle, 21, fixed table body, 22, second slide rail, 23, bottom plate, 24, adjustment plate, 25, leg Part support block, 26, Third slide rail, 27, Rack, 28, Coupling rod, 29, Gear, 30, Gear box, 31, Leg accommodating slot, 32, Leg fixing strap, 33, Lock block, 34, locking screw.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

As shown in the figure: a foot immobilizer for lower extremity tumor radiotherapy, comprising a base plate 1, a first inversion plate 2, a second inversion plate 3, a third inversion plate 4, a surgical foot fixation component and a non-operative foot fixation component .

The base plate 1 has a rectangular through hole, the first turning plate 2 is arranged in the rectangular through hole of the base plate 1 , the first turning plate 2 is hinged with the base plate 1 through the first rotating shaft 5 , and the first rotating shaft 5 passes through the first turning plate 2 . The middle part is arranged, and both ends of the first rotating shaft 5 are protruded from the first turning plate 2 and are fixedly connected with the base plate 1 . The first rotating shaft 5 and the first turning plate 2 are movably connected, the first rotating shaft 5 will not rotate all the time, and the first turning plate 2 will turn around the first rotating shaft 5 .

The first turning plate 2 is divided into a surgical foot placement area and a non-operative foot placement area along both sides of the first rotating shaft 5. The surgical foot placement area and the non-operative foot placement area are respectively provided with rectangular through holes. A second turning plate 3 is arranged in the through hole. The second turning plate 3 is hinged with the first turning plate 2 through a second rotating shaft 6 , and the second rotating shaft 6 is fixedly penetrated in the middle of the second turning plate 3 . The second turning plate 3 and the second rotating shaft 6 are rigidly connected, the second rotating shaft 6 will rotate simultaneously with the turning of the second turning plate 3, and the third turning plate 4 is arranged in the rectangular through hole of the non-surgical foot placement area. , the third turning plate 4 is hinged with the first turning plate 2 through a third rotating shaft 7 , and the third rotating shaft 7 is penetrated in the middle of the third turning plate 4 .

The axes of the second rotating shaft 6 and the third rotating shaft 7 are coincidently arranged, the first rotating shaft 5 is fixedly sleeved with a first bevel gear 9, one end of the second rotating shaft 6 is fixedly sleeved with a second bevel gear 10, and the third rotating shaft is fixedly sleeved with a second bevel gear 10. One end of the 7 is fixedly sleeved with a third bevel gear 8 , and the first bevel gear 9 is meshed with the second bevel gear 10 and the third bevel gear 8 respectively. The flipping linkage among the first flipping plate 2 , the second flipping board 3 and the third flipping board 4 is achieved through three bevel gears. The middle of the first turning plate 2 is provided with a gear avoidance hole 11 , the first bevel gear 9 , the second bevel gear 10 and the third bevel gear 8 are all located in the gear avoidance hole 11 , and a protective cover is provided at the gear avoidance hole 11 .

When flipping the first flipping plate 2, the first flipping board 2 drives the second flipping board 3 and the third flipping board 4 on it to flip around the first rotating shaft 5 at the same time, that is to say, it also drives the second rotating shaft 6 and the first rotating shaft 5 at the same time. The third rotating shaft 7 is turned over around the first rotating shaft 5. During the turning process, since the first bevel gear 9 is fixed, the second bevel gear 10 and the third bevel gear 8 rotate simultaneously, and the second bevel gear 10 and the third bevel gear 8 rotate simultaneously. The three bevel gears 8 drive the second rotating shaft 6 and the third rotating shaft 7 to rotate respectively, and the second rotating shaft 6 and the third rotating shaft 7 respectively drive the second turning plate 3 and the third turning plate 4 to turn over. The flipping of the second flipping plate 3 and the third flipping board 4 is achieved synchronously. When the first flipping board 2 is flipped, the surgical foot placement area and the non-operative foot placement area are exchanged.

The foot fixing assembly includes a base 12, a lifting rod 13 and a limit frame 14. The base 12 and the limit frame 14 are both U-shaped structures. The lower end of the lifting rod 13 is fixed on the second flip plate 3, and the opening of the base 12 is fixed upward. At the top of the lifting rod 13, the opening of the limit frame 14 is set downward, one end of the limit frame 14 is hinged with one end of the base 12 through a pin shaft, and the other end of the limit frame 14 is movable with the other end of the base 12 through a buckle connect. The inside of the base 12 is provided with a soft gasket, the horizontal part of the limiter 14 is provided with a threaded hole, and a top tightening screw 15 is screwed in the threaded hole. The bottom end is connected with a pressing block 16, the upper end face of the pressing block 16 is provided with a blind hole, a bearing is arranged in the blind hole, the outer ring of the bearing is fixed in the blind hole, and the bottom end of the top tightening screw 15 is connected with the inner part of the bearing. Ring fixed connection. The inner sides of the two vertical parts of the limiting frame 14 are respectively provided with sliding grooves, and the two sides of the pressing block 16 are respectively provided with side wings which can be inserted into the sliding grooves. The lower end surface of the pressing block 16 is provided with a soft pad, which can protect the foot of the patient during the fixing process.

Among them, the lift rod 13 is a rod body with a telescopic length, and any rod body structure with adjustable height in the prior art can be used, and an electric push rod can also be used.

The function of the surgical foot fixing component is to support and fix the foot on the side of the patient that needs radiotherapy. During radiotherapy, the patient places the ankle in the U-shaped groove of the base 12, and then turns the limiter 14 over and It is fastened on the base 12, so that the patient's ankle is placed in the channel formed by the base 12 and the limit frame 14, and then by rotating the top tightening screw 15, the top tightening screw 15 is moved downward, and the pressing block 16 is driven at the same time. Move downward, so that the pressing block 16 squeezes the patient's ankle, so as to achieve the purpose of fixing the patient's foot.

The non-surgical foot fixing assembly includes a foot bracket 17 and a first sliding rail 18. The first sliding rail 18 is arranged on the third turning plate 4, and the first sliding rail 18 and the third rotating shaft 7 are arranged parallel to each other. The foot bracket 17 is composed of a U-shaped bracket and a support rod, the U-shaped bracket is slidably connected to the first slide rail 18 through the support rod, and the opening of the U-shaped bracket is arranged upward.

The function of the non-surgical foot fixation component is to support the patient's non-surgical feet, and it is not necessary to fix the non-surgical feet. It only needs to support the non-surgical feet at a suitable height, which is suitable for the patient's comfort, and, during the radiotherapy process , in order to relieve the fatigue caused by the non-surgical feet maintaining a certain posture, so that the foot support 17 supporting the non-surgical feet can slide on the first sliding rail 18 .

In order to facilitate the fixation after position adjustment, a limiting piece 19 is provided at one end of the first flip plate 2 along the length direction, and blinds for the limiting piece 19 to be embedded are respectively provided on both sides of the substrate 1 in the length direction of the rectangular through hole. One side of the blind hole is provided with a blocking piece 20 through a pin shaft, and the blind hole is located below the movement track of the blocking piece 20 .

Example 2

As shown in the figure: a fixed table for lower extremity tumor radiotherapy, comprising a fixed table body 21, an operating leg fixer, and the foot fixer described in Embodiment 1.

The fixed table body 21 includes a lower body support part and an upper body support part which are hinged to each other. The structure of the fixed table body 21 is similar to a bed in a medical system, and its backrest part can be turned over so that the patient can adjust. The foot holder is connected to the tail end of the lower body support part of the fixing table body 21 through its base plate 1. The lower body support part of the fixing table body 21 is provided with a blind hole, and the blind hole is arranged with the first slide rail 18 parallel to each other. the second slide rail 22.

The leg fixer includes a bottom plate 23, an adjustment plate 24 and a leg support block 25, the bottom plate 23 is slidably arranged on the second slide rail 22, and the bottom plate 23 is provided with a third slide rail 26 perpendicular to the second slide rail 22, The regulating plate 24 is slidably arranged on the third sliding rail 26 , and the leg support block 25 is fixedly arranged on the upper end surface of the regulating plate 24 .

The entire surgical leg fixer is arranged in the blind hole of the fixing table body 21, the bottom plate 23 can slide left and right along the second slide rail 22, and the adjusting plate 24 can slide back and forth along the third slide rail 26. The left and right sliding of the bottom plate 23 is for the purpose of Adjustments made due to the difference in the operated leg.

The blind hole of the fixing table body 21 is provided with an elongated through hole on one side of the first slide rail 18, and the lower end of the bottom plate 23 is provided with a rack 27 along its length direction, and the rack 27 passes through the elongated through hole. Hole set. One end of the first rotating shaft 5 facing the fixing table body 21 is connected to the base plate 1 through a bearing. The side wall of the base plate 1 is provided with a through hole, a bearing is rotatably arranged in the through hole, and the end of the first rotating shaft 5 is placed on the inner ring of the bearing. And fixedly connected with the inner ring, the inner end of the bearing outer ring is connected with the first turning plate 2 through the sleeve, the sleeve is sleeved outside the first rotating shaft 5, and the outer end of the bearing outer ring is fixedly connected with the first rotating shaft 5. The shaft coupling rod 28, one end of the coupling rod 28 is fixedly connected with the outer ring of the bearing, and the other end of the coupling rod 28 is sleeved with a gear 29 which is drivingly connected with the rack 27. The function of the gear box 30 is to adjust the transmission ratio, so that after the first shaft 5 rotates by 180°, the rack 29 can just move from one side of the blind hole of the fixing table body 21 to the other side.

Since one end of the first rotating shaft 5 is fixedly connected to the base plate 2, the other end of the second rotating shaft 5 is fixed to the inner ring of the bearing, and the first turning plate 2 drives the sleeve to rotate during the turning process. , the casing drives the outer ring of the bearing to rotate, and the outer ring of the bearing drives the coupling rod 28 to rotate. The coupling rod 28 drives the gear 29 to rotate. By moving left and right, the synchronous adjustment among the surgical foot fixation component, the non-surgical foot fixation component and the surgical leg fixer is finally realized.

The upper end surface of the leg support block 25 is provided with a leg accommodating groove 31 , the bottom of the leg accommodating groove 31 is laid with a flexible pad, and both sides of the leg accommodating groove 31 are provided with leg fixing straps 32 . The patient places the leg that needs radiotherapy in the leg accommodating slot 31 , and then the leg and the leg support block 25 are fixed together by the leg fixing straps 32 .

One side of the adjustment plate 24 is provided with a locking block 33, the lower end surface of the locking block 33 is flush with the lower end surface of the leg support block 25, and the locking block 33 is provided with a top-to-bottom through the locking block 33. A threaded through hole, a locking screw 34 is screwed in the threaded through hole, and the length of the locking screw 34 is greater than the depth of the threaded through hole.

Through the above structure, the front and rear positions of the leg support block 25 can be fixed. When the leg support block 25 is moved to an appropriate position, the locking screw 34 is rotated to move the locking screw 34 downward and then the bottom plate 23 is pressed, so as to realize For the positioning of the leg support block 25, it should be noted that the adjustment plate 24 is stuck on the third slide rail 26. Therefore, after the locking screw 34 moves downward and then pushes the bottom plate 23, the adjustment plate 24 and the third sliding rail 23 are increased. The friction between the slide rails 26 completes the fixing of the adjusting plate 24 .

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention.

Claims (12)

1. A foot fixer for radiotherapy of lower limb tumor is characterized in that: comprises a base plate (1), a first turnover plate (2), a second turnover plate (3), a third turnover plate (4), an operative foot fixing component and a non-operative foot fixing component;

the substrate (1) is provided with a rectangular through hole;

the first turnover plate (2) is arranged in the rectangular through hole of the base plate (1), the first turnover plate (2) is hinged with the base plate (1) through a first rotating shaft (5), the first rotating shaft (5) penetrates through the middle of the first turnover plate (2) to be arranged, and two ends of the first rotating shaft (5) extend out of the first turnover plate (2) and are fixedly connected with the base plate (1);

the first turnover plate (2) is divided into an operation foot placing area and a non-operation foot placing area along two sides of a first rotating shaft (5), rectangular through holes are respectively formed in the operation foot placing area and the non-operation foot placing area, a second turnover plate (3) is arranged in the rectangular through holes of the operation foot placing area, the second turnover plate (3) is hinged with the first turnover plate (2) through a second rotating shaft (6), and the second rotating shaft (6) is fixedly arranged in the middle of the second turnover plate (3) in a penetrating mode; a third turnover plate (4) is arranged in the rectangular through hole of the non-operative foot placement area, the third turnover plate (4) is hinged with the first turnover plate (2) through a third rotating shaft (7), and the third rotating shaft (7) is fixedly arranged in the middle of the third turnover plate (4) in a penetrating manner;

the axis coincidence setting of second pivot (6) and third pivot (7), first pivot (5) and second pivot (6) and third pivot (7) are all mutually perpendicular, fixed cover is equipped with first bevel gear (9) on first pivot (5), the fixed cover of one end of second pivot (6) is equipped with second bevel gear (10), the fixed cover of one end of third pivot (7) is equipped with third bevel gear (8), first bevel gear (9) respectively with second bevel gear (10) and third bevel gear (8) intermeshing.

2. The foot fixator for radiotherapy of tumors of the lower limbs of claim 1, wherein: the middle part of the first turnover plate (2) is provided with a gear avoiding hole (11), the first bevel gear (9), the second bevel gear (10) and the third bevel gear (8) are all located in the gear avoiding hole (11), and a protective cover is arranged at the gear avoiding hole (11).

3. The foot fixator for radiotherapy of tumors of the lower limbs of claim 1, wherein: fixed subassembly of art foot includes base (12), lifter (13) and spacing (14), base (12) and spacing (14) are the U-shaped structure, the lower extreme of lifter (13) is fixed on second returning face plate (3), the opening of base (12) is upwards fixed on the top of lifter (13), the opening of spacing (14) sets up downwards, the one end of spacing (14) is articulated through the one end of round pin axle with base (12), the other end of spacing (14) passes through the other end swing joint of buckle and base (12).

4. The foot fixator for radiotherapy of tumors of the lower limbs of claim 3, wherein: the inside of base (12) is provided with soft liner, is provided with the screw hole on the horizontal part of spacing (14), and threaded hole internal rotation is equipped with top tight screw rod (15), and the top of top tight screw rod (15) is connected with manual knob, and the bottom of top tight screw rod (15) is connected with compact heap (16), and the up end of compact heap (16) is provided with the blind hole, is provided with the bearing in the blind hole, and the outer lane of bearing is fixed in the blind hole, the bottom of top tight screw rod (15) and the inner circle fixed connection of bearing.

5. The foot fixator for radiotherapy of tumors of the lower limbs of claim 4, wherein: the inner sides of the two vertical parts of the limiting frame (14) are respectively provided with a sliding groove, and the two sides of the pressing block (16) are respectively provided with a side wing which can be clamped into the sliding grooves.

6. The foot support according to claim 4 or 5, for use in radiotherapy of tumors of the lower extremities, wherein: the lower end face of the pressing block (16) is provided with a soft gasket.

7. The foot fixator for radiotherapy of tumors of the lower limbs of claim 1, wherein: the non-operative foot fixing assembly comprises a foot support (17) and a first sliding rail (18), the first sliding rail (18) is arranged on a third turnover plate (4), the first sliding rail (18) and a third rotating shaft (7) are arranged in parallel, the foot support (17) is composed of a U-shaped support and a supporting rod, the U-shaped support is connected with the first sliding rail (18) in a sliding mode through the supporting rod, and an opening of the U-shaped support is arranged upwards.

8. The foot fixator for radiotherapy of tumors of the lower limbs of claim 1, wherein: one end of the first turnover plate (2) in the length direction is provided with a limiting piece (19), blind holes capable of being embedded by the limiting piece (19) are respectively formed in two sides of the base plate (1) in the length direction of the rectangular through hole, a blocking piece (20) is arranged on one side of each blind hole through a pin shaft, and the blind holes are located below the movement track of the blocking piece (20).

9. A fixed station for radiotherapy of lower limb tumors is characterized in that: comprises a fixing table body (21), a leg fixer and the foot fixer of claim 1;

the fixed table body (21) comprises a lower trunk supporting part and an upper trunk supporting part which are hinged with each other;

the foot fixer is connected to the tail end of the lower trunk supporting part of the fixed table body (21) through the substrate (1), a blind hole is formed in the lower trunk supporting part of the fixed table body (21), and a second sliding rail (22) parallel to the first sliding rail (18) is arranged in the blind hole;

the operation leg fixator comprises a bottom plate (23), an adjusting plate (24) and a leg supporting block (25), wherein the bottom plate (23) is arranged on a second slide rail (22) in a sliding mode, a third slide rail (26) which is perpendicular to the second slide rail (22) is arranged on the bottom plate (23), the adjusting plate (24) is arranged on the third slide rail (26) in a sliding mode, and the leg supporting block (25) is fixedly arranged on the upper end face of the adjusting plate (24);

a strip-shaped through hole is formed in one side, located on the first sliding rail (18), of the blind hole of the fixed table body (21), a rack (27) is arranged at the lower end of the bottom plate (23) along the length direction of the bottom plate, and the rack (27) penetrates through the strip-shaped through hole;

the utility model discloses a bearing, including base plate (1), through-hole, the inner ring of bearing and inner circle fixed connection are arranged in to the end of first pivot (5), the sleeve pipe is connected with first returning face plate (2) in the lateral wall of base plate (1), the rotatable bearing that is provided with in the through-hole, the end of first pivot (5) is arranged in the inner circle of bearing and is connected with inner circle fixed connection, the inner of bearing outer lane is connected with first returning face plate (2) through the sleeve pipe, the sleeve pipe overlaps and establishes in first pivot (5) outside, the outer end fixedly connected with of bearing outer lane and first pivot (5) coaxial shaft coupling pole (28), the one end of shaft coupling pole (28) and the outer lane fixed connection of bearing, the other pot head of shaft coupling pole (28) is equipped.

10. A gantry for radiotherapy of tumours of the lower extremities of claim 9, wherein: the gear (29) is in transmission connection with the rack (27) through a gear box (30), and the input end and the output end of the gear box (30) are meshed with the gear (29) and the rack (27) respectively.

11. A gantry for radiotherapy of tumours of the lower extremities of claim 9, wherein: leg accommodating grooves (31) are formed in the upper end face of the leg supporting block (25), flexible liners are laid at the bottoms of the leg accommodating grooves (31), and leg fixing bands (32) are arranged on two sides of each leg accommodating groove (31).

12. A gantry for radiotherapy of tumours of the lower extremities of claim 9, wherein: one side of the adjusting plate (24) is provided with a locking block (33), the lower end face of the locking block (33) is flush with the lower end face of the leg supporting block (25), a threaded through hole penetrating through the locking block (33) from top to bottom is formed in the locking block (33), a locking screw (34) is screwed in the threaded through hole, and the length of the locking screw (34) is larger than the depth of the threaded through hole.

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