Body position fixing device applied to radiotherapy of mammary gland patient

Abstract

The invention discloses a body position fixing device applied to radiotherapy of a mammary gland patient. The body position fixing device comprises a mounting plate, a bearing plate, a headrest, a leg limiting mechanism, a holding column, an upper limb bearing pad groove, a neck limiting block and an anti-skid block. The mounting plate can be directly placed on a lying bed body and is stably fixed through the clamping plates on the two sides; when the patient lies, the upper body of the patient is rotated to a proper angle, so that the radiotherapy body position requirements of various angles are met; after being lifted, the big arms of the upper limbs of the patient are cushioned by the upper limb cushion bearing grooves, and the upper limb cushion bearing grooves can flexibly slide in position and rotate in angle, so that the upper limb cushion bearing grooves can adapt to patients with different upper limb lengths and different positioning requirements; the neck of the patient is clamped and fixed through the opposite or opposite movement of the neck limiting blocks on the two sides. The anti-skid block can block the buttocks of the patient and prevent the body of the patient from sliding down when the patient lies on the back. A limiting groove and a limiting strip on the mounting plate can be matched with a vacuum pad for use to assist in fixing the lower body of the patient.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a body position fixing device used for radiotherapy of breast patients. Background Art

[0002] Postoperative radiotherapy for breast cancer is one of the important means of treating breast cancer, aiming to reduce the risk of local recurrence and improve survival rate. Radiotherapy methods are divided into external irradiation and internal irradiation. External irradiation is the most common radiotherapy method, which uses high-energy rays from outside the body to irradiate the tumor site, while internal irradiation is to place the radiation source directly at or near the tumor site. During radiotherapy, patients may experience some side effects, such as skin reactions (such as redness, itching, peeling, etc.), fatigue, nausea, vomiting, loss of appetite and other digestive system symptoms, as well as bone marrow suppression, lung damage, etc.

[0003] Indications for radiotherapy include post-breast-conserving surgery, as well as positive axillary lymph nodes or T3-4 after mastectomy and axillary lymph node dissection. The radiotherapy period is generally about 5 weeks, and the doctor will develop a targeted treatment plan based on the patient's physical condition and condition.

[0004] After radiotherapy, patients need to undergo regular follow-up examinations to monitor tumor recurrence and metastasis. At the same time, patients should maintain a good lifestyle, such as a balanced diet, moderate exercise, smoking cessation and alcohol restriction, which will help improve the body's immunity and promote recovery. During and after radiotherapy, patients also need to actively seek psychological support, relieve psychological pressure, and maintain a good attitude.

[0005] For radiotherapy after modified radical mastectomy or breast-conserving surgery for breast cancer, the fixation device requires the patient to feel comfortable, simple and convenient, with high repeatability of the position, and small errors in resetting and treatment positioning. However, the current fixation device for radiotherapy after breast cancer surgery is a breast support or vacuum pad, which has the problems of poor fixation of the neck and upper limbs and a large range of motion, resulting in large errors in resetting and treatment positioning;

[0006] Therefore, it is necessary to provide a body position fixation device for breast patients undergoing radiotherapy, which can be used in conjunction with a breast support or a vacuum pad to stably fix the patient's neck and upper limbs so that the error is as small as possible when the position is repeated. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a body position fixing device for breast patients undergoing radiotherapy, the body position fixing device is designed based on the stable fixation and position size recording methods of various organs of the patient's body, and consists of legs;

[0008] In order to achieve the above technical objectives, the present invention is implemented by the following technical solutions:

[0009] A body position fixing device for breast patients undergoing radiotherapy, comprising: a mounting plate, a support plate, a headrest, a leg limiting mechanism, a gripping column, an upper limb support groove, a neck limiting block, and an anti-sliding block;

[0010] The mounting plate is a plate with an N-shaped cross section, with a base plate cantilevered outward fixedly connected to the bottom of one end, and a support plate rotatably connected to the top end surface; a leg limiting mechanism is fixedly installed on the upper surface of the other end of the mounting plate; a headrest, a gripping column, an upper limb support groove, and a neck limiting block are slidably installed on the support plate; the anti-sliding block is slidably installed on the mounting plate;

[0011] A mounting frame is slidably mounted on the carrier plate, and the mounting frame includes a top slide rail and two side slide rails; the two side slide rails are respectively fixedly connected to both ends of the top slide rail, and the track formed by the top slide rail and the two side slide rails is U-shaped;

[0012] The top slide rail is slidably mounted with a gripping column on both sides; the two side slide rails are slidably mounted with a second slide rail; the second slide rail is slidably mounted with a mounting seat, a bearing seat is rotatably mounted on the mounting seat, and an upper limb bearing groove is rotatably mounted on the top of the bearing seat;

[0013] The headrest is located between the two upper limb support grooves; neck limit blocks are slidably installed on both sides of the headrest; the neck limit blocks are arc-shaped blocks adapted to the anatomical structure of the human neck;

[0014] The mounting plate is provided with a plurality of concave limiting grooves, to which a plurality of upwardly protruding limiting strips are fixedly connected;

[0015] The leg limiting mechanism comprises a gear, two racks and a leg bearing pad groove; the two racks are respectively meshed with the gear on both sides of the gear, and the two-way rotation of the gear drives the two racks to move towards and away from each other; the leg bearing pad grooves are respectively rotatably installed above the two ends away from each other; the leg bearing pad grooves are arc-shaped groove plates adapted to the anatomical structure of the human leg;

[0016] Furthermore, the upper limb support groove and the leg support groove are both provided with a restraint belt; the restraint belt is one or more of a snap-on buckle belt, an elastic belt, and a Velcro belt;

[0017] Furthermore, clamping plates are slidably mounted on both sides of the lower interior of the mounting plate, and a threaded rod 1 is rotatably connected to a single clamping plate; the threaded rod 1 spirally passes through the side wall of the mounting plate and drives the clamping plate to slide relative to the mounting plate through its own circular rotation;

[0018] Further, the mounting plate is provided with a size scale 1 and a size scale 2; the size scale 1 is parallel to the extension direction of the rack, and indicates the position of the leg bearing groove on the mounting plate and the distance between the two leg bearing grooves; the size scale 2 is perpendicular to the size scale 1, and is parallel to the central axis direction of the human anatomical structure, and indicates the position of the anti-sliding block on the mounting plate; the support plate is respectively provided with a size scale 3 and a size scale 4; the size scale 3 is parallel to the central axis direction of the human anatomical structure, and indicates the position of the headrest and the slide rail on the mounting plate, and the size scale 4 indicates the position of the neck limit block on the support plate;

[0019] Furthermore, a support rod is rotatably connected to the pad, and the top end of the support rod is rotatably connected to the bottom of the support plate; the support rod is a retractable rod with a fixed length after retraction;

[0020] Furthermore, the track of the top slide rail is perpendicular to the central axis of the human anatomical structure; the end of the side slide rail is away from the end of the top slide rail and is toward one end of the leg limiting mechanism;

[0021] Furthermore, the top slide rail, the side slide rail and the second slide rail are respectively provided with size scales 5, 6 and 7; the size scale 5 indicates the horizontal positions of the two gripping posts on the support plate; the size scales 6 and 7 together indicate the horizontal position of the upper limb support groove on the support plate;

[0022] Furthermore, the sliding direction of the rack is perpendicular to the central axis of the human anatomical structure; the anti-sliding block is a long strip block structure, and the sliding direction is perpendicular to the sliding direction of the rack; the track of the top slide is perpendicular to the central axis of the human anatomical structure; the sliding track of the headrest is parallel to the central axis of the human anatomical structure;

[0023] Further, a bearing seat is rotatably mounted on the mounting seat, the upper limb bearing slot is rotatably mounted on the top of the bearing seat, a driving gear is rotatably mounted on the bearing seat, the driving gear is located below the upper limb bearing slot, and drives the upper limb bearing slot to rotate through gear meshing;

[0024] Furthermore, the bottoms of the bearing seat and the leg bearing slot are both fixedly connected with a rotating seat; the rotating seat is fixedly installed with a spring pin; the bearing seat and the leg bearing slot are limited by the spring pin after rotation;

[0025] Furthermore, the mounting frame and the headrest slide by means of a spiral push; the holding column, the mounting seat, and the neck limit block are limited by one or more of a latch, a spring pin, and a fastening nut after sliding; the two neck limit blocks move toward or away from each other by means of a spiral fastening;

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a body position fixation device for breast patients during radiotherapy. Compared with the traditional one, it can meet the accuracy requirements of body position fixation for breast radiotherapy by fixing the head, neck and upper limbs of the patient stably and recording the specific positions. It can also be used with vacuum pads and thermoplastic films to achieve a higher accuracy of positioning operation. Specifically;

[0028] The mounting plate can be directly placed on the bed on which the patient lies, and can be stably fixed by the splints on both sides. It can be adapted to most existing beds for use, or it can be used independently after a support structure is set at the bottom of the mounting plate. By controlling the extension and retraction of the support rod to drive the rotation of the support plate, the patient's upper body can be quickly rotated to a suitable angle when the patient lies, meeting the requirements of radiotherapy positions at various angles.

[0029] After the patient's upper limb is lifted up, it is cushioned by the upper limb cushion groove. The upper limb cushion groove can flexibly slide and rotate, and can adapt to patients with different upper limb lengths and different positioning requirements. The angle and position of the upper limb cushion groove on the support plate can be recorded so that it can be directly used when repositioning.

[0030] The neck of the patient is clamped and fixed by the neck limit blocks on both sides moving toward or away from each other. The side of the neck limit block that fits the human body can be a cushion or an air bag, which can fix the neck without affecting the patient's normal breathing.

[0031] The anti-sliding block on the mounting plate can block the buttocks of the patient to prevent the body from sliding down when the patient lies on his back. The limiting groove and the limiting strip on the mounting plate can be used in conjunction with the vacuum pad to assist in fixing the patient's lower limbs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention from one perspective;

[0034] Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective;

[0035] Figure 3 It is a schematic diagram of the combined installation structure of the rack and the leg bearing groove of the present invention;

[0036] Figure 4 is a side view of the present invention;

[0037] Figure 5 is a schematic diagram of the frame structure of the present invention with the mounting plate removed;

[0038] Figure 6 It is a structural schematic diagram of the present invention without the mounting plate and the support plate;

[0039] Figure 7 The present invention Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;

[0040] Figure 8 The present invention Figure 1 A magnified schematic diagram of the local structure at B in the middle;

[0041] Fig. 9 The present invention Figure 1 A magnified schematic diagram of the local structure at C in the middle;

[0042] Fig.10 The present invention Figure 2 A magnified schematic diagram of the local structure at D in the middle;

[0043] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0044] 1-mounting plate, 101-pad, 102-support rod, 103-limiting groove, 104-limiting strip, 105-clamping plate, 106-threaded rod one, 107-size scale one, 108-size scale two, 2-supporting plate, 201-size scale three, 202-size scale four, 3-headrest, 4-leg limiting mechanism, 401-gear, 402-rack, 403-leg bearing pad groove, 404-restraint belt, 5-holding column, 6-upper limb bearing groove, 601-mounting seat, 602-bearing seat, 603-driving gear, 604-rotating seat, 605-spring pin, 7-neck limit block, 8-anti-sliding block, 9-mounting frame, 901-top slide rail, 902-side slide rail, 903-slide rail two, 904-size scale five, 906-size scale six, 907-size scale seven. DETAILED DESCRIPTION

[0045] 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.

[0046] Example 1

[0047] See also Figure 1-Figure 10 In this embodiment, a body position fixing device for radiotherapy of breast 3 patients includes: a mounting plate 1, a support plate 2, a headrest 3, a leg limiting mechanism 4, a gripping column 5, an upper limb support groove 6, a neck limiting block 7, and an anti-sliding block 8; in the present invention, each of the above components respectively assumes a corresponding functional role. Specifically, the mounting plate 1 is the basic structure of the present invention, and the remaining components are directly or indirectly mounted and connected to the mounting plate 1, rotate or slide on the mounting plate 1, and the mounting plate 1 is a structure for the patient to lie on when in use;

[0048] In this embodiment, the support plate 2 is a structure for the patient's head and upper body to lie on, and the support plate 2 is rotatably connected to the mounting plate 1, and the angle is set after rotation. The angle between the support plate 2 and the mounting plate 1 can be adjusted to adjust the angle of the patient's upper body lying;

[0049] In this embodiment, the headrest 3 is a structure in the present invention that directly provides a cushion for the patient's head. The component 3 in the present invention is only for functional demonstration, and its structure is not limited to that shown in the accompanying drawings of the invention. Since the headrest is a mature technology in the prior art, those skilled in the art can flexibly select it;

[0050] In this embodiment, the leg limiting mechanism 4 is a structure for limiting the patient's legs, and its main function is to support and place the patient's legs. The position of the legs has little effect on the patient's breast radiotherapy position, so the leg limiting mechanism 4 in the present invention is mainly to make the patient's position comfortable.

[0051] In this embodiment, the holding column 5 is a structure for the patient to hold with the palm of his hand after raising his upper limbs. The specific position of the holding column 5 will affect the position of the patient's breast. Therefore, the specific position of the holding column 5 needs to be clearly recorded and confirmed.

[0052] In this embodiment, the upper limb support groove 6 is a structure for supporting the upper arm of the patient's upper limb, and its height, angle and position will affect the accuracy of breast radiotherapy. Therefore, each time the breast radiotherapy is positioned, the height, angle and position of the upper limb support groove 6 of the device can be adjusted to achieve accurate positioning of the upper limb;

[0053] In this embodiment, the neck limit block 7 is a structure for clamping and fixing the patient's neck from both sides of the neck; the positioning and fixing of the neck is related to the accurate position of breast radiotherapy, so the neck limit block 7 is provided in the present invention to fix the patient's neck;

[0054] In this embodiment, the mounting plate 1 is a plate with an N-shaped cross section, with a bottom of one end fixedly connected to a pad 101 cantilevered outward, and a support plate 2 rotatably connected to the top end surface; a leg limiting mechanism 4 is fixedly installed on the upper surface of the other end of the mounting plate 1; a headrest 3, a gripping column 5, an upper limb support groove 6, and a neck limiting block 7 are slidably installed on the support plate 2; the anti-sliding block 8 is slidably installed on the mounting plate 1;

[0055] In this embodiment, a mounting frame 9 is slidably mounted on the carrier plate 2, and the mounting frame 9 includes a top slide rail 901 and two side slide rails 902; the two side slide rails 902 are respectively fixedly connected to the two ends of the top slide rail 901, and the track formed by the track of the top slide rail 901 and the two side slide rails 902 is U-shaped; that is, in the present invention, by setting the mounting frame 9, the gripping column 5 and the upper limb support pad groove 6 slide on the mounting frame 9; and by the overall sliding of the mounting frame 9, the displacement range is expanded to better adapt to patients of different body shapes;

[0056] In this embodiment, gripping columns 5 are slidably mounted on both sides of the top slide rail 901; slide rails 903 are slidably mounted on the two side slide rails 902; a mounting seat 601 is slidably mounted on the slide rails 903, a bearing seat 602 is rotatably mounted on the mounting seat 601, and an upper limb bearing groove 6 is rotatably mounted on the top of the bearing seat 602;

[0057] In this embodiment, the headrest 3 is located between the two upper limb support grooves 6; neck limit blocks 7 are slidably installed on both sides of the headrest 3; the neck limit blocks 7 are arc-shaped blocks adapted to the anatomical structure of the human neck; the neck limit blocks 7 are components that directly contact the human neck. Because the human neck is relatively fragile, it is easy to cause breathing difficulties after being compressed. Therefore, in actual use, a flexible and suitable structure of a cushion or airbag can be set on the side of the neck limit block 7 that directly contacts the human body, so as to stabilize the patient's neck while avoiding excessive compression of the patient's neck and affecting breathing.

[0058] In this embodiment, the mounting plate 1 is provided with a plurality of concave limiting grooves 103, to which a plurality of upwardly protruding limiting strips 104 are fixedly connected; the limiting grooves 103 and the limiting strips 104 of the present invention are reserved structures for use with vacuum pads and thermoplastic films, and their function is to limit the vacuum pads.

[0059] In this embodiment, the leg limiting mechanism 4 includes a gear, two racks 402 and a leg bearing pad groove 403; the two racks 402 are respectively meshed with the gear on both sides of the gear, and the two-way rotation of the gear drives the two racks 402 to move toward and away from each other; the leg bearing pad grooves 403 are respectively rotatably installed above the two ends away from each other of the two racks 402; the leg bearing pad grooves 403 are arc-shaped groove plates adapted to the anatomical structure of the human leg;

[0060] In this embodiment, the upper limb support groove 6 and the leg support groove 403 are both provided with a restraint belt 404; the restraint belt 404 is one or more of a snap-on belt, an elastic belt, and a Velcro belt; the restraint belt is a mature technology in the prior art, and its role and function in the present invention is to restrain and fix the upper arm and leg of the upper limb;

[0061] In this embodiment, clamping plates are slidably installed on both sides of the lower inner part of the mounting plate 1, and a threaded rod 106 is rotatably connected to a single clamping plate 105; the threaded rod 106 spirally passes through the side wall of the mounting plate 1 and drives the clamping plate to slide relative to the mounting plate 1 through its own circular rotation;

[0062] In this embodiment, the mounting plate 1 is provided with a size scale 107 and a size scale 2 108; the size scale is parallel to the extension direction of the rack 402, and indicates the position of the leg bearing groove 403 on the mounting plate 1 and the distance between the two leg bearing grooves 403; the size scale is perpendicular to the size scale 107, and is parallel to the central axis direction of the human anatomical structure, indicating the position of the anti-sliding block 8 on the mounting plate 1; the support plate 2 is respectively provided with a size scale 3 201 and a size scale 4 202; the size scale 3 201 is parallel to the central axis direction of the human anatomical structure, and indicates the position of the headrest 3 and the slide rail on the mounting plate 1, and the size scale 4 202 indicates the position of the neck limit block 7 on the support plate 2;

[0063] In this embodiment, the pad 101 is rotatably connected to a support rod 102, and the top end of the support rod 102 is rotatably connected to the bottom of the carrier plate 2; the support rod 102 is a retractable rod with a fixed length after retraction; there is a linear relationship between the length of the support rod 102 and the angle of the carrier plate relative to the mounting plate 1, so by adjusting and recording the length of the support rod 102, the angle between the carrier plate and the mounting plate 1 can be determined; the specific selection of the support rod can be selected from various types of telescopic rods in the prior art under the conditions of meeting the radiotherapy conditions and sterility requirements;

[0064] In this embodiment, the trajectory of the top slide rail 901 is perpendicular to the central axis of the human anatomical structure; the end of the side slide rail 902 is away from the end of the top slide rail 901 and toward one end of the leg limiting mechanism 4;

[0065] In this embodiment, the top slide rail 901, the side slide rail 902 and the second slide rail 903 are respectively provided with a size scale 5 904, a size scale 6 906 and a size scale 7 907; the size scale 5 904 indicates the horizontal position of the two gripping columns 5 on the support plate 2; the size scale 6 906 and the size scale 7 907 together indicate the horizontal position of the upper limb support groove 6 on the support plate 2;

[0066] In this embodiment, the sliding direction of the rack 402 is perpendicular to the central axis of the human anatomical structure; the anti-sliding block 8 is a long strip block structure, and the sliding direction is perpendicular to the sliding direction of the rack 402; the trajectory of the top slide rail 901 is perpendicular to the central axis of the human anatomical structure; the sliding trajectory of the headrest 3 is parallel to the central axis of the human anatomical structure;

[0067] In this embodiment, a bearing seat 602 is rotatably mounted on the mounting seat 601, the upper limb bearing slot 6 is rotatably mounted on the top of the bearing seat 602, and a driving gear 603 is rotatably mounted on the bearing seat 602. The driving gear is located below the upper limb bearing slot 6 and drives the upper limb bearing slot 6 to rotate through gear meshing.

[0068] In this embodiment, the bottom of the bearing seat 602 and the leg bearing slot 403 are fixedly connected to a rotating seat 604; a spring pin 605 is fixedly installed on the rotating seat 604; the bearing seat 602 and the leg bearing slot 403 are limited by the spring pin 605 after rotation;

[0069] In this embodiment, the mounting frame 9 and the headrest 3 slide by means of a spiral push; the holding column 5, the mounting seat 601, and the neck limit block 7 slide and limit by means of one or more of a latch, a spring pin 605, and a fastening nut; the two neck limit blocks 7 move toward or away from each other by means of a spiral fastening;

[0070] In this embodiment, the specific use process of a body position fixation device applied to breast patients undergoing radiotherapy is as follows:

[0071] After the components of the device are assembled and installed according to the diagram and the above text description; according to the medical conditions, choose to place the device on the bed through the mounting plate 1, or install a cushioning device under the mounting plate 1 to cushion the device; the patient lies on the mounting plate 1 and the support plate 2; according to the above-mentioned recording method, slide the mounting frame 9, the headrest 3, the holding column 5, and the anti-sliding block 8 to the appropriate positions required for radiotherapy, and use the dimensional data of several dimensional scales on the support plate 2, the mounting plate 1, and the mounting frame 9; so as to quickly and accurately position the device next time; when a vacuum pad is needed for auxiliary fixation, a vacuum pad is set on the mounting plate 1; the vacuum pad is constrained by the limiting groove 103 and the limiting strip 104, and is stably fixed on the mounting plate 1 and plays a role in limiting and fixing the body of the radiotherapy patient;

[0072] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A body position fixing device for breast patients undergoing radiotherapy, characterized in that: include: Mounting plate, support plate, headrest, leg limit mechanism, grip column, upper limb support groove, neck limit block, anti-sliding block; The mounting plate is a plate with an N-shaped cross section, with a base plate cantilevered outward fixedly connected to the bottom of one end, and a support plate rotatably connected to the top end surface; a leg limiting mechanism is fixedly installed on the upper surface of the other end of the mounting plate; a headrest, a gripping column, an upper limb support groove, and a neck limiting block are slidably installed on the support plate; the anti-sliding block is slidably installed on the mounting plate; A mounting frame is slidably mounted on the carrier plate, and the mounting frame includes a top slide rail and two side slide rails; the two side slide rails are respectively fixedly connected to both ends of the top slide rail, and the track formed by the top slide rail and the two side slide rails is U-shaped; The top slide rail is slidably mounted with a gripping column on both sides; the two side slide rails are slidably mounted with a second slide rail; the second slide rail is slidably mounted with a bearing pad seat, the bearing pad seat is rotatably mounted with a bearing pad seat, and the top of the bearing pad seat is rotatably mounted with an upper limb bearing pad groove; The headrest is located between the two upper limb support grooves; neck limit blocks are slidably mounted on both sides of the headrest; the neck limit blocks are arc-shaped blocks adapted to the anatomical structure of the human neck; The mounting plate is provided with a plurality of concave limiting grooves, to which a plurality of upwardly protruding limiting strips are fixedly connected; The leg limiting mechanism comprises a gear, two racks and a leg bearing pad groove; the two racks are respectively meshed with the gear on both sides of the gear, and the two-way rotation of the gear drives the two racks to move towards and away from each other; the leg bearing pad grooves are respectively rotatably installed above the two ends away from each other; the leg bearing pad grooves are arc-shaped groove plates adapted to the anatomical structure of the human leg; The upper limb support groove and the leg support groove are both provided with restraint belts; the restraint belts are one or more of letter buckle belts, elastic belts, and Velcro belts.

2. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: Clamping plates are slidably installed on both sides of the interior below the mounting plate, and a threaded rod 1 is rotatably connected to a single clamping plate; the threaded rod 1 spirally passes through the side wall of the mounting plate and drives the clamping plate to slide relative to the mounting plate through its own circular rotation.

3. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: Size scale one and size scale two are provided on the mounting plate; the size scale is parallel to the extension direction of the rack, and indicates the position of the leg support groove on the mounting plate and the distance between the two leg support grooves; the size scale is perpendicular to size scale one, and parallel to the central axis direction of the human anatomical structure, and indicates the position of the anti-sliding block on the mounting plate; size scale three and size scale four are respectively provided on the supporting plate; the size scale three is parallel to the central axis direction of the human anatomical structure, and indicates the position of the headrest and the slide rail on the mounting plate, and the size scale four indicates the position of the neck limit block on the supporting plate.

4. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: A support rod is rotatably connected to the pad, and the top end of the support rod is rotatably connected to the bottom of the support plate; the support rod is a retractable rod with a fixed length after being retracted.

5. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: The track of the top slide rail is perpendicular to the central axis of the human anatomical structure; the end of the side slide rail is away from the end of the top slide rail and is directed toward one end of the leg limiting mechanism.

6. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: The top slide rail, the side slide rail and the second slide rail are respectively provided with size scales five, six and seven; the size scale five indicates the horizontal positions of the two holding columns on the support plate; the size scale six and the size scale seven together indicate the horizontal position of the upper limb support groove on the support plate.

7. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: The sliding direction of the rack is perpendicular to the central axis of the human anatomical structure; the anti-sliding block is a long block structure, and its sliding direction is perpendicular to the sliding direction of the rack; the trajectory of the top slide rail is perpendicular to the central axis of the human anatomical structure; the sliding trajectory of the headrest is parallel to the central axis of the human anatomical structure.

8. The body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: A bearing seat is rotatably mounted on the bearing seat, and the upper limb bearing groove is rotatably mounted on the top of the bearing seat. A driving gear is rotatably mounted on the bearing seat, and the driving gear is located below the upper limb bearing groove and drives the upper limb bearing groove to rotate through gear meshing.

9. A body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: The bottoms of the bearing seat and the leg bearing slot are both fixedly connected with a rotating seat; a spring pin is fixedly installed on the rotating seat; and the bearing seat and the leg bearing slot are limited by the spring pin after rotation.

10. The body position fixing device for breast patients during radiotherapy according to claim 1, characterized in that: The mounting frame and the headrest are both slid by means of a spiral push; the holding column, the support seat, and the neck limit block are limited after sliding by one or more of a latch, a spring pin, and a fastening nut; the two neck limit blocks are respectively moved toward or away from each other by means of spiral fastening.

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