Radiotherapy positioning device

Abstract

The invention relates to the technical field of radiotherapy positioning, and discloses a radiotherapy positioning device which comprises a supporting bed, a foot baffle is fixedly installed on the supporting bed, a supporting plate is slidably installed on the supporting bed, a vacuum pad is arranged on the supporting plate, a pressing plate is fixedly installed at the lower end of the vacuum pad, and the pressing plate is fixedly installed on the inner wall of the bottom of the supporting plate through a plurality of telescopic rods. According to the radiotherapy positioning device, the wedge-shaped plate is pushed downwards through the body weight of a patient, the wedge-shaped plate descends by a certain distance every time the body weight of the patient reaches one interval, the wedge-shaped plate is pushed downwards, the wedge-shaped plate is pushed downwards, and the wedge-shaped plate is pushed downwards by the wedge-shaped part when the body weight of the patient reaches the interval. The wedge-shaped plate does not move for different distances each time along with slight difference of the body weight of the patient, and meanwhile, the wedge-shaped plate is matched with the wedge-shaped piece, and the sliding rod is matched with the inclined surface of the triangular plate, so that the sliding piece moves for different distances according to the body weight of the patient, and the side surfaces of the body of the patient with different body weights can be effectively and well coated by the positioning film.

Description

Technical Field

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

[0002] The radiotherapy positioning device is a key device used to accurately locate and calibrate the patient's position during radiotherapy. Its main function is to ensure that the radiation can accurately and safely irradiate the tumor lesion through various technologies and means, while reducing damage to surrounding normal tissues. The positioning device can fit the patient's body tightly to ensure that the patient maintains a stable position during treatment to avoid affecting the treatment effect due to changes in body position. At the same time, its operation is usually simple and easy to understand, which is convenient for medical staff to quickly get started and operate proficiently. In addition, according to the patient's specific situation and treatment needs, a personalized radiotherapy positioning device can be customized to ensure the best treatment effect. With the continuous development of medical technology, radiotherapy positioning devices will continue to be upgraded and improved, bringing hope and recovery opportunities to more cancer patients. During the actual use of the radiotherapy positioning device, patients of different body shapes will need to be positioned. Some patients may be heavier and have correspondingly larger body dimensions, while some patients may be lighter and have correspondingly smaller body dimensions. When positioning the patient, it is usually necessary to soften the positioning membrane and wrap it around the patient's affected area, and fix its two ends to the corresponding fixing seats. For patients with different body dimensions, the top height of the positioning membrane will be different after wrapping, resulting in differences in the contact area between the body sides of patients of different body shapes and the positioning membrane. For some patients with smaller body dimensions, the contact between the sides of their bodies and the positioning membrane may be insufficient, resulting in poor positioning effect and may reduce the treatment effect. For this reason, we propose a radiotherapy positioning device. Summary of the invention

[0003] The purpose of the present invention is to provide a radiotherapy positioning device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a radiotherapy positioning device, comprising a support bed, a foot baffle is fixedly installed on the support bed, and a support plate is slidably installed on the support plate, a vacuum pad is arranged on the support plate, both ends of the vacuum pad are fixedly installed on the support plate, and a pressure plate is fixedly installed on the lower end of the vacuum pad, and the pressure plate is fixedly installed on the inner wall of the bottom of the support plate through a plurality of telescopic rods, a wedge plate is arranged at the lower end of the pressure plate, and the lower end of the wedge plate passes through the bottom surface of the support plate, a slide plate is arranged inside the support bed, a wedge piece matching with the wedge plate is slidably installed on the slide plate, one end of the wedge piece is fixedly installed with the telescopic plate through a second spring, the telescopic plate is also slidably installed on the slide plate, and one end of the telescopic plate is fixedly connected to the bottom of the support plate, and a limiting strip for limiting the wedge piece and the telescopic plate is fixedly installed on the slide plate; The cam is provided with a plurality of sliding plates, each of which is provided with a plurality of sliding plates at a plurality of opposite ends of the sliding plates, and the plurality of sliding plates are provided with a plurality of sliding plates at a plurality of opposite ends of the sliding plates.

[0005] Preferably, a plurality of first springs are fixedly connected between the wedge plate and the pressure plate, a plurality of first elastic blocks are fixedly installed on both sides of the wedge plate, and two fixed plates are fixedly installed on the inner wall of the bottom of the support plate. The two fixed plates are respectively located on both sides of the wedge plate, and a plurality of first limiting grooves for limiting the first elastic blocks are arranged thereon.

[0006] Preferably, a plurality of telescopic columns are fixedly connected between the slide plate and the inner wall of the bottom of the support bed, a wedge block is fixedly installed at the lower end of the slide plate, a wedge bar matching the wedge block is fixedly installed at the bottom of the support plate, and each of the telescopic columns is in a stretched state.

[0007] Preferably, strips are slidably installed on both sides of the support plate, and a plurality of first adjustment grooves for limiting the insertion strips are provided on the inner walls on both sides of the support bed. A knob is rotatably installed on the support plate through a first torsion spring, and a rotating shaft is rotatably installed inside the support plate. A connecting rope is provided between the rotating shaft and the knob, one end of the connecting rope is fixedly installed on the knob, and the other end is fixedly installed and wound around the rotating shaft, a pull rope is fixedly connected between each of the insertion strips and the rotating shaft, and a third spring is fixedly connected between each of the insertion strips and the inner wall of the support plate.

[0008] Preferably, a pressure sensing plate for detecting the pressure of the second spring is fixedly installed on the telescopic plate, a plurality of cylinders are fixedly installed inside each of the sliding parts, a pressure regulating part controlled by the pressure sensing plate is fixedly installed at the output end of the cylinder, each of the cylinders is controlled to be telescopic by the corresponding pressure regulating part, and each of the card blocks is fixedly installed on the corresponding pressure regulating part.

[0009] Preferably, a plurality of fourth springs are fixedly connected between each of the sliding members and the corresponding triangular plate, a second elastic block is fixedly installed on both sides of each of the sliding members, and a plurality of second limiting grooves for limiting the second elastic block are arranged on the inner wall of the support plate.

[0010] Preferably, a guide groove is provided on the inclined surface of each of the triangular plates, and a guide bar matching the guide groove is fixedly mounted on each of the slide bars.

[0011] Preferably, straight grooves are provided on the inner walls of the first slide cylinder and each second slide cylinder, one side of each straight groove is connected to a plurality of transverse grooves, one end of each transverse groove is connected to a positioning groove, and a guide block is fixedly installed on each positioning rod.

[0012] Preferably, the lower end of the first slide cylinder has a fixing part through a second torsion spring, and a rotating rod is fixedly installed at the lower end of the first slide cylinder. The rotating rod is inserted into the fixing part, and two connecting rods are rotatably installed thereon. A limiting rod is rotatably installed at one end of each of the connecting rods, and each of the limiting rods is slidably installed on the fixing part. A plurality of second adjustment grooves for limiting the limiting rods are arranged on the inner wall of the support plate.

[0013] Preferably, a plurality of rollers are rotatably mounted on both sides of the support plate, and slide grooves for limiting the rollers are provided on the inner walls on both sides of the support bed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes the patient's weight to push the wedge plate downward. Each time the patient's weight reaches an interval, the wedge plate will be lowered by a certain distance. The wedge plate will not move at different distances each time due to slight differences in the patient's weight, thereby improving the stability of positioning. At the same time, through the cooperation between the wedge plate and the wedge piece, and the cooperation between the slide bar and the inclined surface of the triangular plate, the slide piece moves different distances according to the patient's weight, effectively enabling the body sides of patients with different weights to be well covered by the positioning film, thereby improving the accuracy of positioning.

[0015] The present invention utilizes a support plate to drive the movement of the wedge-shaped bar, and through the cooperation of the inclined surface of the wedge-shaped bar and the inclined surface of the wedge-shaped block, as well as the elastic force of the telescopic column, the slide plate moves downward following the height of the patient, so that a patient with a taller height requires a larger weight to move the sliding member, so that the weight of the patient is more matched with the height, and patients of different heights are prevented from using a unified weight standard, thereby improving the accuracy of the positioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the support bed of the present invention; Figure 3 This is a schematic diagram of the wedge plate structure of the present invention; Figure 4 It is a schematic diagram of the wedge-shaped member and the wedge plate structure of the present invention; Figure 5This is a schematic diagram of the knob and the connecting rope structure of the present invention; Figure 6 This is a schematic diagram of the rotating shaft structure of the present invention; Figure 7 It is a schematic diagram of the sliding rod structure of the present invention; Figure 8 This is a schematic diagram of the structure of the set plate of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the sliding member of the present invention; Fig.10 It is a schematic diagram of the structure of the slide cylinder and the positioning rod of the present invention; Fig.11 It is a schematic diagram of the internal structure of the fixing member of the present invention.

[0017] In the figure: 1, support bed; 2, foot baffle; 3, support plate; 4, roller; 5, slide; 6, vacuum pad; 7, pressure plate; 8, telescopic rod; 9, first spring; 10, wedge plate; 11, first elastic block; 12, fixed plate; 13, first limiting groove; 14, slide plate; 15, telescopic column; 16, wedge; 17, telescopic plate; 18, second spring; 19, pressure sensing plate; 20, limiting strip; 21, wedge block; 22, wedge strip; 23, knob; 24, first torsion spring; 25, connecting rope; 26, rotating shaft; 27, pull rope; 28, insert strip; 29, first adjusting groove; 30, third spring; 31. Slide bar; 32. Triangle plate; 33. Guide groove; 34. Guide strip; 35. Fourth spring; 36. Sliding piece; 37. Second elastic block; 38. Second limiting groove; 39. Cylinder; 40. Pressure regulating piece; 41. Block; 42. Positioning film; 43. Fixing strip; 44. Block; 45. First slide; 46. Positioning rod; 47. Straight groove; 48. Horizontal groove; 49. Positioning groove; 50. Guide block; 51. Headrest; 52. Forearm tray; 53. Fixing piece; 54. Second torsion spring; 55. Connecting rod; 56. Limiting rod; 57. Second regulating groove; 58. Second slide; 59. Rotating rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-11The present invention provides a technical solution: a radiotherapy positioning device, comprising a support bed 1, a foot baffle 2 is fixedly installed on the support bed 1, and a support plate 3 is slidably installed, a plurality of rollers 4 are rotatably installed on both sides of the support plate 3, and slide grooves 5 for limiting the rollers 4 are arranged on the inner walls of both sides of the support bed 1. The friction of the support plate 3 in the sliding process is reduced through the cooperation between the rollers 4 and the slide grooves 5, and the insertion strips 28 are slidably installed on both sides of the support plate 3. A plurality of first adjustment grooves 29 for limiting the insertion strips 28 are arranged on the inner walls of both sides of the support bed 1, a knob 23 is rotatably installed on the support plate 3 through a first torsion spring 24, a rotating shaft 26 is rotatably installed inside the support plate 3, a connecting rope 25 is arranged between the rotating shaft 26 and the knob 23, one end of the connecting rope 25 is fixedly installed on the knob 23, and the other end is fixedly installed and wound around the rotating shaft 26, and a pull rope 27 is fixedly connected between each insertion strip 28 and the rotating shaft 26. The third spring 30 is fixedly connected between each inserting strip 28 and the inner wall of the support plate 3. The knob 23 is rotated to make the first torsion spring 24 rotate and store force, and at the same time, the connecting rope 25 is reeled and wound around the lower end of the knob 23, and the connecting rope 25 slides in the support plate 3 and drives the rotating shaft 26 to rotate. The rotating shaft 26 simultaneously reels the two pull ropes 27 thereon and pulls the inserting strips 28 on both sides to move in the support plate 3, and the third spring 30 is compressed. After the first adjusting groove 29 releases the limit of the inserting strip 28, the position of the support plate 3 is adjusted according to the patient's height, and the knob 23 is loosened. The elastic force of the first torsion spring 24 resets the knob 23 and releases the reeled connecting rope 25. The inserting strips 28 on both sides are moved outward of the support plate 3 by the elastic force of the third spring 30, driving the pull rope 27 to reset and causing the rotating shaft 26 to rotate in the opposite direction, and the connecting rope 25 is reeled in again. The inserting strips 28 on both sides will be inserted into the corresponding first adjusting groove 29, so that the support plate 3 is fixed.

[0020] A vacuum pad 6 is provided on the support plate 3 (the vacuum pad 6 is an existing known structure, so the present invention will not be described in detail), both ends of the vacuum pad 6 are fixedly installed on the support plate 3, and a pressing plate 7 is fixedly installed on the lower end thereof, and the pressing plate 7 is fixedly installed on the inner wall of the bottom of the support plate 3 through a plurality of telescopic rods 8, a wedge plate 10 is provided at the lower end of the pressing plate 7, and the lower end of the wedge plate 10 passes through the bottom surface of the support plate 3, and a plurality of first springs 9 are fixedly connected between the wedge plate 10 and the pressing plate 7, and a plurality of first elastic blocks 11 are fixedly installed on both sides of the wedge plate 10, and two fixing plates 12 are fixedly installed on the inner wall of the bottom of the support plate 3, and the two fixing plates 12 are respectively located on both sides of the wedge plate 10, and a plurality of first limiting grooves 13 for limiting the first elastic blocks 11 are provided thereon. After the patient lies on the vacuum cushion 6, his own weight causes the vacuum cushion 6 to deform, and the pressing plate 7 overcomes the elastic force of the telescopic rod 8 and moves downward, and the pressing plate 7 drives the first spring 9 and the wedge plate 10 to move downward. According to the different weights of the patients, the pressing plate 7 will move downward by different distances, and the first elastic block 11 on the wedge plate 10 will be limited by the first limiting groove 13, which will cause the wedge plate 10 to encounter a certain resistance during the downward movement. When the compression force of the first spring 9 is less than the deformation force of the first elastic block 11, the wedge plate 10 will no longer move downward. When the wedge plate 10 moves downward, the first elastic block 11 is pushed by the elastic force of the first spring 9 and will move to the next first limiting groove 13. Every time the patient's weight reaches an interval, the wedge plate 10 will drop a certain distance. The distance of the wedge plate 10 is relatively stable each time, and the movement distance will not be different each time due to slight differences in the patient's weight, thereby improving the stability of positioning. A slide plate 14 is provided inside the support bed 1, and a wedge-shaped piece 16 matching the wedge plate 10 is slidably installed on the slide plate 14. A telescopic plate 17 is fixedly installed at one end of the wedge plate 16 through a second spring 18. The telescopic plate 17 is also slidably installed on the slide plate 14, and one end of the telescopic plate 17 is fixedly connected to the bottom of the support plate 3. A limiting strip 20 for limiting the wedge piece 16 and the telescopic plate 17 is fixedly installed on the slide plate 14. When the support plate 3 moves, the telescopic plate 17 will be driven to move. Through the connection of the second spring 18, the wedge piece 16 will be driven to move synchronously. When the wedge plate 10 moves downward, through its inclined The cooperation between the surface and the inclined surface of the wedge-shaped member 16 will make the wedge-shaped member 16 slide along the slide plate 14 and compress the second spring 18. Since the wedge-shaped plate 10 moves the same distance each time according to the patient's weight, the amplitude of each movement of the wedge-shaped member 16 is also certain. A plurality of telescopic columns 15 are fixedly connected between the slide plate 14 and the inner wall of the bottom of the support bed 1. A wedge block 21 is fixedly installed at the lower end of the slide plate 14. A wedge bar 22 that cooperates with the wedge block 21 is fixedly installed at the bottom of the support plate 3. Each telescopic column 15 is in a stretched state. According to the height of the patient, the support plate 3 will be in different positions on the support bed 1 and drive the wedge bar 22 to move synchronously. Through the cooperation between the inclined surface of the wedge bar 22 and the inclined surface of the wedge block 21, and since the telescopic columns 15 are in a stretched state,When the support plate 3 drives the wedge bar 22 to slide, the slide plate 14 will move downward due to the elastic force of the telescopic column 15. When the patient is taller, the corresponding reasonable weight should be larger. The more the support plate 3 moves, the more the slide plate 14 moves downward. The wedge piece 16 and the telescopic plate 17 are limited by the limit bar 20. The wedge piece 16 and the telescopic plate 17 will move up and down synchronously with the slide plate 14. When the patient is taller, the patient needs to have a larger weight to make the wedge plate 10 and the wedge piece 16 cooperate, so as to prevent patients of different heights from adjusting the positioning device according to the same weight standard.

[0021] Slide bars 31 are installed on both sides of the wedge-shaped member 16 for sliding up and down movement, and each slide bar 31 is installed on the support plate 3 for transverse sliding movement. Triangular plates 32 matching with the ends of the slide bars 31 are installed on the inner walls on both sides of the support plate 3 for sliding movement, and guide grooves 33 are provided on the inclined surfaces of each triangular plate 32. Guide strips 34 matching with the guide grooves 33 are fixedly installed on each slide bar 31. A slide member 36 is provided at one end of each triangular plate 32, and a plurality of fourth springs 35 are fixedly connected between each slide member 36 and the corresponding triangular plate 32. Second elastic blocks 37 are fixedly installed on both sides of each slide member 36, and a plurality of second limiting grooves 38 for limiting the second elastic blocks 37 are provided on the inner wall of the support plate 3. Each slide member 36 is installed for sliding movement. The two sliding members 36 are respectively located on the support plate 3, and the two sliding members 36 are located on both sides of the vacuum pad 6. When the wedge-shaped member 16 cooperates with the wedge plate 10 to move, the sliding bars 31 on both sides thereof will be driven to move. Through the cooperation between the guide strips 34 on the sliding bars 31 and the guide grooves 33, the triangular plate 32 will move into the support plate 3, and the fourth spring 35 will be compressed. When the elastic force of the fourth spring 35 is greater than the deformation force of the second elastic block 37, the second elastic block 37 will drive the sliding member 36 to move to the next second limiting groove 38. Similarly, the downward movement distance of the wedge plate 10 is adjusted by the patient's weight. Every time the patient's weight reaches an interval, the sliding member 36 will move a certain distance to the outside of the support plate 3, thereby improving the stability of the positioning. A plurality of card blocks 41 are provided on each sliding member 36. A positioning film 42 is arranged above the vacuum pad 6, and fixing strips 43 are fixedly installed at both ends of the positioning film 42. Each fixing strip 43 is provided with a plurality of card slots 44 matched with the card block 41. A pressure sensing plate 19 for detecting the pressure of the second spring 18 is fixedly installed on the telescopic plate 17. A plurality of cylinders 39 are fixedly installed inside each sliding member 36, and a pressure regulating member 40 controlled by the pressure sensing plate 19 is fixedly installed at the output end of the cylinder 39. Each cylinder 39 is controlled to be retracted and retracted by the corresponding pressure regulating member 40. Each card block 41 is fixedly installed on the corresponding pressure regulating member 40. The weight of the patient is different within the height range, and the movement distance of the sliding member 36 is also different. The card block 41 cooperates with the card slot 44 to make the positioning film 42 After being wrapped around the patient, the lighter the patient, the smaller the movement distance of the slider 36, and the smaller the distance between the two ends of the positioning film 42 and the patient's body, so that the sides of the patient's body can also be in good contact with the positioning film 42. If the patient is heavier, the corresponding movement distance of the slider 36 is larger, and the patient's body is well wrapped by the positioning film 42 without being overly tight and causing discomfort to the patient. The greater the pressure on the pressure sensing plate 19, the heavier the patient is within the height range, the larger the body dimensions may be, the more fat may be present in the body, and the skin may be looser. The positioning film 42 should apply greater pressure to the patient when wrapping the patient, and the control cylinder 39 should be retracted to a certain extent, thereby improving the accuracy of positioning.

[0022] A first slide 45 is provided on the support plate 3, and two second slides 58 are fixedly installed. A positioning rod 46 is slidably installed in the first slide 45 and each second slide 58. A headrest 51 and two small arm trays 52 are fixedly installed on the upper ends of the three positioning rods 46. Straight grooves 47 are provided on the inner walls of the first slide 45 and each second slide 58. One side of each straight groove 47 is connected to a plurality of transverse grooves 48. One end of each transverse groove 48 is connected to a positioning groove 49. A guide block 50 is fixedly installed on each positioning rod 46. The first slide The lower end of the first slide 45 is provided with a fixing member 53 through a second torsion spring 54. A rotating rod 59 is fixedly installed at the lower end of the first slide 45. The rotating rod 59 is inserted into the fixing member 53, and two connecting rods 55 are rotatably installed on the rotating rod 59. A limiting rod 56 is rotatably installed at one end of each connecting rod 55. Each limiting rod 56 is slidably installed on the fixing member 53. A plurality of second adjustment grooves 57 for limiting the limiting rod 56 are provided on the inner wall of the support plate 3. The height of the headrest 51 and the forearm tray 52 can be adjusted according to the patient's needs. First, the positioning rod 46 is slightly lifted to make the guide The block 50 moves upward along the positioning groove 49 to the connection point between the positioning groove 49 and the transverse groove 48, and then the positioning rod 46 is rotated to move the guide block 50 into the straight groove 47. After the height is adjusted according to the patient's needs, the positioning rod 46 is moved in the opposite direction, and the guide block 50 returns to the bottom of the corresponding positioning groove 49. The height adjustment of the headrest 51 and the forearm tray 52 is completed. When the patient needs to adjust the front and rear position of the headrest 51, the first slide 45 is rotated, and the fixing member 53 is limited by the inner wall of the support plate 3 and cannot be rotated. The second torsion spring 54 will rotate to store force, and at the same time, the rotating rod 59 It will rotate synchronously and drive one end of the two connecting rods 55 to perform circular motion. The limiting rods 56 on both sides will retract into the fixing member 53 synchronously. After the second adjusting groove 57 releases the limit rod 56, the first slide cylinder 45 is slid to drive the headrest 51 to adjust the position. After adjusting to the appropriate position, the first slide cylinder 45 is released. The elastic force of the second torsion spring 54 causes the first slide cylinder 45 to rotate in the opposite direction and reset, and causes the limiting rods 56 on both sides to move out of the fixing member 53 again and be inserted into the corresponding second adjusting grooves 57, so that the position of the fixing member 53 and the headrest 51 is fixed.

[0023] Specifically, first, the patient lies on the vacuum cushion 6 with his feet against the foot baffle 2, and then the position of the support plate 3 is adjusted according to the patient's height. The knob 23 is rotated to make the first torsion spring 24 rotate and store force, and at the same time, the connecting rope 25 is wound around the lower end of the knob 23, and the connecting rope 25 slides in the support plate 3 and drives the rotating shaft 26 to rotate. The rotating shaft 26 simultaneously winds up the two pull ropes 27 thereon and pulls the two side strips 28 to move into the support plate 3, and the third spring 30 is compressed. After the first adjusting groove 29 releases the limit on the strips 28, the position of the support plate 3 is adjusted according to the patient's height, and the knob 23 is released. The elastic force of the first torsion spring 24 resets the knob 23 and releases the wound connecting rope 25. The two side strips 28 are subjected to the elastic force of the third spring 30 to move toward the support plate 3. The support plate 3 moves outward, driving the pull rope 27 to reset, and causing the rotating shaft 26 to rotate in the opposite direction, and the connecting rope 25 is rewound, and the insertion strips 28 on both sides are inserted into the corresponding first adjustment grooves 29 to fix the support plate 3. Then, according to the patient's needs, the height of the headrest 51 and the forearm tray 52 can be adjusted. First, the positioning rod 46 is slightly lifted to allow the guide block 50 to move upward along the positioning groove 49 to the connection between the positioning groove 49 and the transverse groove 48, and then the positioning rod 46 is rotated to allow the guide block 50 to move into the straight groove 47. After adjusting the height according to the patient's needs, the positioning rod 46 is moved in the opposite direction, and the guide block 50 returns to the bottom of the corresponding positioning groove 49. The height adjustment of the headrest 51 and the forearm tray 52 is completed. When the patient needs to adjust the front and rear position of the headrest 51, the first slide is rotated. The second torsion spring 54 rotates and stores force, and the rotating rod 59 rotates synchronously at the same time, and drives one end of the two connecting rods 55 to perform circular motion. The limiting rods 56 on both sides will retract into the fixing member 53 synchronously. After the second adjusting groove 57 releases the limiting rod 56, the first sliding cylinder 45 is slid to drive the headrest 51 to adjust the position. After adjusting to the appropriate position, the first sliding cylinder 45 is released. The elastic force of the second torsion spring 54 causes the first sliding cylinder 45 to rotate in the opposite direction and reset, and causes the limiting rods 56 on both sides to move out of the fixing member 53 again and insert into the corresponding second adjusting groove 57, so that the fixing member 53 and the headrest 51 are fixed. After the patient lies on the vacuum cushion 6, his own weight causes the vacuum cushion 6 to release. The first spring 9 and the wedge plate 10 are moved downwards by the first elastic block 11 and the first spring 9, respectively.The movement distance will not be different each time due to slight differences in the patient's weight, which improves the stability of positioning. When the support plate 3 moves, it will drive the telescopic plate 17 to move, and through the connection of the second spring 18, it will drive the wedge 16 to move synchronously. When the wedge plate 10 moves downward, the wedge 16 will slide along the slide plate 14 through the cooperation of its inclined surface and the inclined surface of the wedge 16, and the second spring 18 will be compressed. Since the wedge plate 10 moves the same distance each time according to the patient's weight, the amplitude of each movement of the wedge 16 is also certain, according to the patient's height. , the support plate 3 will be in different positions on the support bed 1, and drive the wedge strip 22 to move synchronously. Through the cooperation of the inclined surface of the wedge strip 22 and the inclined surface of the wedge block 21, and because the telescopic column 15 is in a stretched state, when the support plate 3 drives the wedge strip 22 to slide, the slide plate 14 will be moved downward by the elastic force of the telescopic column 15. When the patient is taller, the corresponding reasonable weight should be greater. The more the support plate 3 moves, the more the slide plate 14 moves downward. Through the limit bar 20 to limit the wedge 16 and the telescopic plate 17, the wedge 16 and the telescopic plate 17 are The sliding plate 10 will move up and down synchronously with the sliding plate 14. The taller the patient is, the heavier the patient is required to make the wedge plate 10 match with the wedge member 16, so as to prevent patients of different heights from adjusting the positioning device according to the same weight standard. The different weights of patients within their height range will cause the sliding member 36 to move at different distances. The block 41 cooperates with the slot 44, so that after the positioning film 42 is covered on the patient, the lighter the patient is, the smaller the movement distance of the sliding member 36 will be, and the distance between the two ends of the positioning film 42 and the patient's body will be smaller, so that the sides of the patient's body can also be aligned with the positioning film 42. Good contact. If the patient is heavier, the corresponding movement distance of the slider 36 is larger. The patient's body is well covered by the positioning film 42, but it will not be too tight and cause discomfort to the patient. When the pressure on the pressure sensing plate 19 is greater, it means that the patient is within the height range, the heavier the weight, the larger the body dimensions, the more fat there may be in the body, and the skin may be loose. The positioning film 42 should apply greater pressure to the patient when covering the patient, and the control cylinder 39 will be retracted to a certain extent, thereby improving the accuracy of positioning.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radiotherapy positioning device, comprising a support bed (1), characterized in that: The support bed (1) is fixedly mounted with a foot baffle (2) and slidably mounted with a support plate (3); a vacuum pad (6) is arranged on the support plate (3); both ends of the vacuum pad (6) are fixedly mounted on the support plate (3); a pressing plate (7) is fixedly mounted on the lower end of the vacuum pad (6); the pressing plate (7) is fixedly mounted on the inner wall of the bottom of the support plate (3) via a plurality of telescopic rods (8); a wedge plate (10) is arranged at the lower end of the pressing plate (7); the lower end of the wedge plate (10) passes through the bottom surface of the support plate (3); A slide plate (14) is provided inside the support bed (1), a wedge-shaped piece (16) matching with the wedge-shaped plate (10) is slidably mounted on the slide plate (14), a telescopic plate (17) is fixedly mounted on one end of the wedge-shaped piece (16) via a second spring (18), the telescopic plate (17) is also slidably mounted on the slide plate (14), and one end of the telescopic plate (17) is fixedly connected to the bottom of the support plate (3), and a limiting strip (20) for limiting the position of the wedge-shaped piece (16) and the telescopic plate (17) is fixedly mounted on the slide plate (14); Slide bars (31) are slidably mounted on both sides of the wedge-shaped member (16), each of the slide bars (31) is slidably mounted on the support plate (3) in a transverse direction, and triangular plates (32) that cooperate with the ends of the slide bars (31) are slidably mounted on the inner walls of both sides of the support plate (3), one end of each triangular plate (32) is provided with a slide bar (36), each of the slide bars (36) is slidably mounted on the support plate (3), and the two slide bars (36) are respectively located on both sides of the vacuum pad (6), and each of the slide bars (36) is provided with a plurality of card blocks (41). A positioning film (42) is arranged above the empty pad (6), and fixing strips (43) are fixedly installed at both ends of the positioning film (42), and each of the fixing strips (43) is provided with a plurality of card slots (44) that match the card block (41). A first slide cylinder (45) is arranged on the support plate (3), and two second slide cylinders (58) are fixedly installed thereon. A positioning rod (46) is slidably installed in the first slide cylinder (45) and each of the second slide cylinders (58), and a headrest (51) and two small arm trays (52) are fixedly installed on the upper ends of the three positioning rods (46).

2. A radiotherapy positioning device according to claim 1, characterized in that: A plurality of first springs (9) are fixedly connected between the wedge plate (10) and the pressure plate (7), a plurality of first elastic blocks (11) are fixedly mounted on both sides of the wedge plate (10), and two fixing plates (12) are fixedly mounted on the inner wall of the bottom of the support plate (3), the two fixing plates (12) are respectively located on both sides of the wedge plate (10), and a plurality of first limiting grooves (13) for limiting the first elastic blocks (11) are arranged thereon.

3. A radiotherapy positioning device according to claim 2, characterized in that: A plurality of telescopic columns (15) are fixedly connected between the slide plate (14) and the inner wall of the bottom of the support bed (1); a wedge block (21) is fixedly mounted on the lower end of the slide plate (14); a wedge bar (22) matching the wedge block (21) is fixedly mounted on the bottom of the support plate (3); and each of the telescopic columns (15) is in a stretched state.

4. A radiotherapy positioning device according to claim 3, characterized in that: Insertion strips (28) are slidably mounted on both sides of the support plate (3); a plurality of first adjustment slots (29) for limiting the position of the insertion strips (28) are arranged on the inner walls on both sides of the support bed (1); a knob (23) is rotatably mounted on the support plate (3) via a first torsion spring (24); a rotating shaft (26) is rotatably mounted inside the support plate (3); a connecting rope (25) is arranged between the rotating shaft (26) and the knob (23); one end of the connecting rope (25) is fixedly mounted on the knob (23); the other end of the connecting rope (25) is fixedly mounted on and wound around the rotating shaft (26); a pull rope (27) is fixedly connected between each of the insertion strips (28) and the rotating shaft (26); and a third spring (30) is fixedly connected between each of the insertion strips (28) and the inner wall of the support plate (3).

5. A radiotherapy positioning device according to claim 1, characterized in that: A pressure sensing plate (19) for detecting the pressure of the second spring (18) is fixedly mounted on the telescopic plate (17); a plurality of cylinders (39) are fixedly mounted inside each of the sliding members (36); a pressure regulating member (40) controlled by the pressure sensing plate (19) is fixedly mounted on the output end of the cylinder (39); each of the cylinders (39) is controlled to extend and retract by a corresponding pressure regulating member (40); and each of the clamping blocks (41) is fixedly mounted on a corresponding pressure regulating member (40).

6. A radiotherapy positioning device according to claim 5, characterized in that: A plurality of fourth springs (35) are fixedly connected between each of the sliding members (36) and the corresponding triangular plate (32), a second elastic block (37) is fixedly mounted on both sides of each of the sliding members (36), and a plurality of second limiting grooves (38) for limiting the second elastic block (37) are arranged on the inner wall of the support plate (3).

7. A radiotherapy positioning device according to claim 6, characterized in that: A guide groove (33) is provided on the inclined surface of each triangular plate (32), and a guide bar (34) matching the guide groove (33) is fixedly mounted on each slide bar (31).

8. A radiotherapy positioning device according to claim 1, characterized in that: A straight groove (47) is provided on the inner wall of the first slide cylinder (45) and each second slide cylinder (58), one side of each straight groove (47) is connected to a plurality of transverse grooves (48), one end of each transverse groove (48) is connected to a positioning groove (49), and a guide block (50) is fixedly mounted on each positioning rod (46).

9. A radiotherapy positioning device according to claim 8, characterized in that: The lower end of the first slide cylinder (45) is provided with a fixing member (53) via a second torsion spring (54). A rotating rod (59) is fixedly mounted on the lower end of the first slide cylinder (45). The rotating rod (59) is inserted into the fixing member (53) and has two connecting rods (55) rotatably mounted thereon. A limiting rod (56) is rotatably mounted on one end of each of the connecting rods (55). Each of the limiting rods (56) is slidably mounted on the fixing member (53). A plurality of second adjustment grooves (57) for limiting the limiting rods (56) are arranged on the inner wall of the support plate (3).

10. A radiotherapy positioning device according to claim 1, characterized in that: A plurality of rollers (4) are rotatably mounted on both sides of the support plate (3), and slide grooves (5) for limiting the position of the rollers (4) are arranged on the inner walls on both sides of the support bed (1).

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