Tumor radiotherapy bed with positioning function

Abstract

The invention discloses a tumor radiotherapy bed with a positioning function, which comprises a base for supporting, a lifting component for realizing a lifting effect and a bed board for a patient to lie, the lifting component is fixedly mounted at the top of the base, the bed board is mounted at the top of the lifting component through a moving component, and the top of the bed board is provided with bilaterally symmetrical sliding chutes; the part, located in the sliding groove, of the positioning assembly comprises a limiting block, an ejector block, a guide rod and a spring, and the part, located outside the sliding groove, of the positioning assembly comprises a fixing frame, a pressing block, a positioning roller, a rotating shaft, a first driven gear, a first driving gear and an electric push rod. The thermoplastic film is tensioned through friction force generated by relative displacement between rotation and the surface of the thermoplastic film, the thermoplastic film can be ensured to be in a flat state in the stress tensioning process through the special design of the positioning assembly, and the comfort of a patient can be improved in the positioning process of the limbs of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a tumor radiotherapy bed with a positioning function. Background Art

[0002] Tumor radiotherapy is a local treatment method that uses radiation to treat tumors. Radiation includes α, β, and γ rays produced by radioactive isotopes and x-rays, electron beams, proton beams, and other particle beams produced by various x-ray therapy machines or accelerators. About 70% of cancer patients need radiotherapy during the treatment of cancer, and about 40% of cancers can be cured by radiotherapy. The role and status of radiotherapy in tumor treatment are becoming increasingly prominent, and it has become one of the main means of treating malignant tumors.

[0003] During tumor radiotherapy, the patient needs to lie on the radiotherapy bed. Since radiotherapy requires that the radioactivity be accurately irradiated on the tumor, the patient is prohibited from moving during the radiotherapy. Therefore, a thermoplastic film is used to cover the part of the patient that needs radiotherapy. The thermoplastic film covering the patient's body is then tightened and positioned to position the patient's limbs, which can effectively prevent the patient from moving during radiotherapy.

[0004] At present, when the thermoplastic film is tensioned and positioned, a positioning component is mainly used to position the thermoplastic film on the radiotherapy bed, so that the thermoplastic film is in a tensioned state, so as to facilitate the positioning of the patient's limbs. Since a single positioning component can only position one corner of the thermoplastic film, multiple positioning components are required to complete the positioning of the entire thermoplastic film. Since multiple positioning components cannot be operated at the same time, the tension on each area of ​​the thermoplastic film is not the same. On the one hand, this will cause the thermoplastic film to wrinkle during the positioning of the patient's limbs, thereby reducing the positioning effect, and on the other hand, it will cause discomfort to the patient's body parts. Summary of the invention

[0005] Technical issues solved: In view of the deficiencies of the prior art, the present invention provides a tumor radiotherapy bed with a positioning function, thereby solving the technical problems mentioned in the background technology.

[0006] Technical solution: To achieve the above purpose, the present invention is implemented through the following technical solution: it includes a base for support, a lifting component for achieving a lifting effect and a bed board for patients to lie on, the lifting component is fixedly installed on the top of the base, the bed board is installed on the top of the lifting component through a moving component, and a left-right symmetrical slide groove is provided on the top of the bed board. A positioning component for positioning the thermoplastic film is slidably installed on the slide groove. The cross-sectional shape of the slide groove is a "T" shape. The lifting component is composed of a hydraulic cylinder and a rubber dust cover and mounting plates on the upper and lower sides, which can realize the up and down lifting operation of the bed board.

[0007] Furthermore, the part of the positioning assembly located inside the slide groove includes a limit block, a top block, a guide rod and a spring. The spring installed at the bottom of the top block is squeezed to contract, the top of the top block contacts the inner top of the slide groove, and the guide rod fixedly connected to the bottom of the top block slides inside the guide groove, thereby performing a guiding role in the process of squeezing the spring.

[0008] Furthermore, the limit block is engaged with the tooth plate for positioning, and the serration direction of the top of the tooth plate is opposite to the serration direction of the bottom of the limit block, which can prevent the positioning assembly from moving in the direction where the patient lies while tightening the thermoplastic film, thereby losing the positioning effect.

[0009] Furthermore, the part of the positioning assembly located outside the slide groove includes a fixed frame, a pressure block, a positioning roller, a rotating shaft, a first driven gear, a first driving gear and an electric push rod. The positioning roller is divided into two sections and fixedly connected to the rotating shaft. The first driven gear is fixedly connected to the surface of the rotating shaft and is located between the two sections of the positioning rollers. The pressure block and the positioning roller are arranged in a horizontal direction. The diameter of the positioning roller is larger than the diameter of the first driven gear. A plurality of hemispherical protrusions are arranged on the radial side surface of the positioning roller. The plurality of hemispherical protrusions are distributed in a row on the positioning roller. The interior of the hemispherical protrusion is hollow. A pressure sensor is fixedly installed inside the hemispherical protrusion. In addition to installing the pressure sensor, the hemispherical protrusion can also increase the friction between the positioning roller and the thermoplastic film.

[0010] Furthermore, the electric push rod is fixedly connected to the fixing frame, the pressure block is fixedly connected to the telescopic end of the electric push rod, the first motor is fixedly connected to the fixing frame, the first driving gear is fixedly connected to the output end of the first motor, and is meshed with the first driven gear fixed on the rotating shaft. The silicone material on the surface of the positioning roller has a large friction with the thermoplastic film to achieve pre-positioning of the thermoplastic film, which can improve the continuity of the positioning and tightening operation of the edge of the thermoplastic film, thereby reducing the convenience of positioning and locking the thermoplastic film.

[0011] Furthermore, by observing the values ​​of a row of pressure sensors that are closest to the position tangent to the positioning roller, the stress conditions of the patient's body parts and the estimation of the restraint force of the positioning part of the patient's limbs can be clearly determined. The values ​​of the pressure sensors can be uploaded to the central control computer through wireless data transmission or wired data transmission and finally displayed on the display screen. Subsequently, the electric push rod is further extended to make the pressing block exert greater pressure on the thermoplastic film, thereby realizing the operation of pressing the edge of the thermoplastic film.

[0012] Furthermore, the top view shape of the top block is a rectangle, the guide rods are distributed at the four corners of the top block, the cross-sectional shape, position and number of the guide rods correspond to the cross-sectional shape, position and number of the guide groove, which can further improve the stability of the positioning guide, and the inner and outer parts of the positioning assembly are connected together by a connecting piece, and the top block and the spring are symmetrically arranged with the connecting piece as the center.

[0013] Furthermore, the fixing frame for installing the positioning roller is in an "L" shape as a whole, and two baffles are symmetrically fixedly connected to the horizontal section of the fixing frame, and the rotating shaft is rotatably connected between the two baffles. A gap is provided between the baffle and the vertical section of the fixing frame, and the stretched thermoplastic film can be accommodated by providing the gap. The height of the baffle is less than the height of the outermost edge of the top of the positioning roller, so that the edge of the thermoplastic film can be kept flat after positioning is completed. The fixing part of the electric push rod is fixedly connected to the vertical section of the fixing frame, and the edge of the thermoplastic film can be auxiliary pressed from the side. The side of the pressing block facing the positioning roller is in an arc shape, which can effectively increase the contact area with the thermoplastic film.

[0014] Furthermore, the driving component includes a second motor, a second driving gear, a second driven gear, a screw rod and a nut. The second motor is fixedly connected to the top of the lifting component, the second driving gear is fixedly connected to the output end of the second motor, the nut is connected to the screw rod by a thread, the outer surface of the nut is fixedly connected to a bearing, the outer surface of the bearing is fixedly connected to the second driven gear, the second driven gear is meshed with the first driven gear, the top of the lifting component is fixedly connected to a positioning frame, the positioning frame is fixedly connected to a bearing, the inner surface of the bearing is fixedly connected to the outer surface of the nut, the nut is connected to the screw rod by a thread, and both ends of the screw rod are fixedly connected to the bottom of the bed board.

[0015] Furthermore, the pulley is installed on the top of the lifting component, the slide rail is installed on the bottom of the bed board, the number of the pulleys is multiple, and the multiple pulleys and the slide rails are symmetrically distributed on the lifting component.

[0016] Beneficial effects: In this solution, by setting a positioning roller and utilizing the friction between the positioning roller and the thermoplastic film, and then using a pressure block to increase the friction between the positioning roller and the thermoplastic film, when the positioning roller rotates in the direction of tightening the thermoplastic film, the thermoplastic film can be positioned and tightened. Since the positioning roller is driven by the first motor, multiple parts of the thermoplastic film can be pulled synchronously, and the uniformity of the force on the thermoplastic film can be guaranteed as much as possible.

[0017] In this solution, the fixing frame is set into an "L" shape, and a baffle is set on the horizontal section of the fixing frame, and the height of the baffle is set to be smaller than the height of the positioning roller. At the same time, a gap is set between the baffle and the vertical section of the fixing frame. This ensures that the thermoplastic film is stretched along the direction of rotation of the positioning roller, and then the excess thermoplastic film is accumulated and stored in the gap, so that the thermoplastic film can be kept in a flat state as much as possible during the stretching stress process.

[0018] In this solution, a pressure sensor is installed inside the hemispherical protrusion, and the pressure sensors are distributed in an array, so that the force conditions of the thermoplastic film in contact with different areas of the positioning roller can be detected. According to the pressure value fed back by the pressure sensor, it can be determined whether the thermoplastic film is subjected to uniform force during the stretching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the bed board of the present invention; Figure 3 It is a left view of the external structure of the present invention; Figure 4 It is a front view of the external structure of the present invention; Figure 5 It is a schematic diagram of the structure of the positioning component of the present invention; Figure 6 It is a schematic diagram of the relative position of the cross section of the positioning roller and the thermoplastic film of the present invention; Figure 7 For the present invention Figure 2 A is an enlarged view of the middle image.

[0021] Legend: 1. Base; 2. Bed board; 3. Slide; 4. Positioning assembly; 5. Lifting component; 6. Tooth plate; 7. Slide rail; 8. Pulley; 9. Screw rod; 10. Pressure sensor; 11. Second motor; 12. Second driving gear; 13. Nut; 14. Positioning frame; 15. Second driven gear; 401, fixed frame; 402, pressure block; 403, positioning roller; 404, rotating shaft; 405, electric push rod; 406, guide groove; 407, first driven gear; 408, first motor; 409, first driving gear; 4010, limit block; 4011, top block; 4012, guide rod; 4013, spring. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, so the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not connected with the invention will be omitted from the drawings. The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Reference Figure 1-7 As shown, this embodiment introduces a specific structure of a tumor radiotherapy bed with a positioning function, including a base 1 for support, a lifting component 5 for achieving a lifting effect, and a bed board 2 for a patient to lie on, the lifting component 5 is fixedly installed on the top of the base 1, and the bed board 2 is installed on the top of the lifting component 5 through a moving component, and a left-right symmetrical slide groove 3 is provided on the top of the bed board 2, and a positioning component 4 for positioning a thermoplastic film is slidably installed on the slide groove 3, and the cross-sectional shape of the slide groove 3 is a "T" shape. By setting the slide groove 3, the position of the positioning component 4 can be effectively moved according to the body contour of the patient, which is conducive to improving the flexibility of the positioning operation.

[0023] The part of the positioning assembly 4 located inside the slide groove 3 includes a limit block 4010, a top block 4011, a guide rod 4012 and a spring 4013. After the patient lies on the bed board 2, the positioning assembly 4 is first pulled upward according to the patient's body contour so that the limit block 4010 is separated from the limit contact with the tooth plate 6. In the process of pulling the positioning assembly 4 upward, the spring 4013 installed at the bottom of the top block 4011 is squeezed to shrink. At this time, the top of the top block 4011 contacts the inner top of the slide groove 3, and then the guide rod 4 fixedly connected to the bottom of the top block 4011 is 012 slides inside the guide groove 406, thereby guiding in the process of squeezing the spring 4013. By setting the limit block 4010, it can effectively cooperate with the tooth plate 6, which can well prevent the positioning component 4 from moving during the positioning process, thereby causing the problem of positioning failure. By setting the spring 4013, on the one hand, it can ensure that the limit block 4010 can move upward conveniently to achieve the effect of contact limiting, which is conducive to increasing the pressure of the limit block 4010 on the tooth plate 6, making the positioning more firm and stable; The positioning assembly 4 can be loosened by pushing it to move near the body contour, and then the limit block 4010 will move downward under the elastic force of the spring 4013 to engage with the tooth plate 6 for positioning. Since the sawtooth direction of the top of the tooth plate 6 is opposite to the sawtooth direction of the bottom of the limit block 4010, the positioning assembly 4 can be prevented from moving toward the direction where the patient lies while tightening the thermoplastic film, thereby losing the positioning effect. The part of the positioning assembly 4 located outside the slide 3 includes a fixing frame 401, a pressing block 402, a positioning roller 403, a rotating shaft 404, a first driven gear 407, a first driving gear 409 and an electric push rod 405, which covers the thermoplastic film restraining the patient's body part on the patient's body surface and ensures that the edge of the thermoplastic film passes through the position between the pressing block 402 installed on the telescopic end of the electric push rod 405 and the positioning roller 403, and at the same time, the radial side surface of the positioning roller 403 is in close contact with the side surface of the thermoplastic film. The positioning roller 403 is divided into two sections and is fixedly connected to the rotating shaft 4 04, the first driven gear 407 is fixedly connected to the surface of the rotating shaft 404 and is located between the two sections of positioning rollers 403. The pressure block 402 is provided to prevent the thermoplastic film from falling off the positioning roller 403 during the positioning process, and to apply greater pressure to the thermoplastic film after the positioning is completed, thereby improving the stability of the positioning of the thermoplastic film. The positioning roller 403 can effectively tighten the thermoplastic film by rotating, and can effectively tighten multiple parts of the thermoplastic film at the same time, thereby helping to improve the uniformity of the force on the thermoplastic film. The pressing block 402 and the positioning roller 403 are arranged in a horizontal direction. The diameter of the positioning roller 403 is larger than the diameter of the first driven gear 407. A plurality of hemispherical protrusions are arranged on the radial side surface of the positioning roller 403. The plurality of hemispherical protrusions are arranged in a row on the positioning roller 403. The positioning roller 403 is made of a silicone material. The interior of the hemispherical protrusion is hollow. A pressure sensor 10 is fixedly installed inside the hemispherical protrusion. In addition to installing the pressure sensor 10, the hemispherical protrusion can also increase the friction between the positioning roller 403 and the thermoplastic film. By setting the diameter of the positioning roller 403 larger than the diameter of the first driven gear 407, it is convenient to prevent the thermoplastic film from being affected by the first driven gear 407 during the tightening process. The pressure sensor 10 is arranged to facilitate the detection of the tension on the thermoplastic film. The thermoplastic film is not wound around the positioning roller 403 in a circular manner. The electric push rod 405 fixedly mounted on the fixing frame 401 is extended to push the pressing block 402 to move to contact the thermoplastic film. At this time, the pressure exerted by the pressing block 402 on the thermoplastic film is very small. Then, the first motor 408 fixedly mounted on the fixing frame 401 is used to drive the first driving gear 409 to rotate, thereby driving the first driven gear 407 fixed on the rotating shaft 404 to rotate. With the rotation of the first driven gear 407, the rotating shaft 404 and the positioning roller 403 fixed on the rotating shaft 404 can also rotate synchronously, that is, the thermoplastic film can be tightened. The silicone material on the surface of the positioning roller 403 has a large friction with the thermoplastic film to achieve pre-positioning of the thermoplastic film, which can improve the consistency of the positioning and tightening operation of the edge of the thermoplastic film, thereby reducing the convenience of positioning and locking the thermoplastic film. When the positioning roller 403 pulls the thermoplastic film tight, the force at the position where the thermoplastic film and the positioning roller 403 are tangent is the greatest. At this time, by observing the values ​​of the pressure sensors 10 in a row closest to the position where the thermoplastic film and the positioning roller 403 are tangent, the force applied to the patient's body parts and the estimation of the restraint force of the patient's limb positioning part can be clearly understood. The values ​​of the pressure sensors 10 can be uploaded to the central control computer through wireless data transmission or wired data transmission and finally displayed on the display screen. Then, the electric push rod 405 is further extended to make the pressing block 402 apply greater pressure on the thermoplastic film, thereby realizing the operation of pressing the edge of the thermoplastic film. The top block 4011 is rectangular in shape when viewed from above. The guide rods 4012 are distributed at the four corners of the top block 4011. The cross-sectional shape, position and number of the guide rods 4012 correspond to the cross-sectional shape, position and number of the guide groove 406, which can further improve the stability of the positioning guide. The inner and outer parts of the positioning assembly 4 located at the slide groove 3 are connected together by a connecting piece. The top block 4011 and the spring 4013 are symmetrically arranged with the connecting piece as the center. The fixing frame 401 on which the positioning roller 403 is installed is in an "L" shape as a whole. Two baffles are symmetrically fixedly connected to the horizontal section of the fixing frame 401. The rotating shaft 404 is rotatably connected between the two baffles. A gap is set between the baffle and the vertical section of the fixing frame 401. The gap can be set to accommodate the stretched thermoplastic film. The height of the baffle is less than the height of the top edge of the positioning roller 403, which can ensure that the edge of the thermoplastic film can be kept flat after positioning. The fixed part of the electric push rod 405 is fixedly connected to the vertical section of the fixed frame 401, which can assist in pressing the edge of the thermoplastic film from the side, and the thermoplastic film is in lubricated contact with the pressing block 402. The side of the pressing block 402 facing the positioning roller 403 is in an arc shape, which can effectively increase the contact area with the thermoplastic film.

[0024] When the patient lies completely flat and has completed positioning of the body, the bed board 2 is first lifted and moved to the corresponding position of the radiotherapy equipment by the lifting component 5, which can facilitate the radiotherapy bed and the patient to enter the interior of the radiotherapy equipment. The lifting component 5 is composed of a hydraulic cylinder, a rubber dust cover, and mounting plates on the upper and lower sides, which can realize the up and down lifting operation of the bed board 2; The driving component includes a second motor 11, a second driving gear 12, a second driven gear 15, a screw rod 9 and a nut 13. The second motor 11 installed on the top of the lifting component 5 drives the second driving gear 12 to mesh with the second driven gear 15 to drive the nut 13 installed on the top of the lifting component 5 to rotate. The top of the lifting component 5 is fixedly connected with a positioning frame 14, and the positioning frame 14 is fixedly connected with a bearing. The inner surface of the bearing is fixedly connected with the outer surface of the nut 13. The nut 13 is connected to the screw rod 9 through a thread, and then the screw rod 9 fixed on the bottom of the bed board 2 is driven to move through the threaded engagement. As the screw rod 9 moves, it will also move synchronously with the bed board 2, which can effectively improve the stability of the movement of the bed board 2. During the movement, the bed board 2 is guided by the pulley 8 installed on the top of the lifting component 5 and the slide rail 7 installed on the bottom of the bed board 2. At the same time, since the second motor 11 is fixed on the top of the lifting component 5 and does not contact the bottom of the bed board 2, the position of the second motor 11 and the position of the nut 13 will not move, so the bed board 2 can only move linearly to the interior of the radiotherapy equipment for radiotherapy operations. There are multiple pulleys 8, and the multiple pulleys 8 and the slide rails 7 are symmetrically distributed on the lifting component 5.

[0025] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A tumor radiotherapy bed with positioning function, characterized in that: The invention comprises a base (1) for supporting, a lifting component (5) for achieving a lifting effect, and a bed board (2) for a patient to lie on, wherein the lifting component (5) is fixedly mounted on the top of the base (1), the bed board (2) is mounted on the top of the lifting component (5) via a moving component, a slide groove (3) is provided on the bed board (2), a tooth plate (6) is fixedly connected to the inner bottom of the slide groove (3), and a positioning component (4) for positioning a thermoplastic film is slidably arranged inside the slide groove (3); The positioning assembly (4) comprises a fixing frame (401), a pressing block (402), a positioning roller (403), a rotating shaft (404), a first driven gear (407), a first driving gear (409) and an electric push rod (405); a plurality of hemispherical protrusions are arranged on the radial side surface of the positioning roller (403); a pressure sensor (10) is fixedly connected inside the hemispherical protrusion.

2. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The positioning assembly (4) further comprises a guide groove (406), a guide rod (4012), a top block (4011), a spring (4013) and a limit block (4010); the top of the limit block (4010) is fixedly connected to a connecting piece; the top of the connecting piece extends to the outside of the slide groove (3) and is fixedly connected to the bottom of the fixing frame (401); the guide groove (406) is arranged at the top of the limit block (4010); the top of the guide rod (4012) and the top of the spring (4013) are both fixedly connected to the bottom of the top block (4011); the bottom of the guide rod (4012) extends to the inside of the guide groove (406); and the bottom of the spring (4013) is fixedly connected to the top of the limit block (4010).

3. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The pressing block (402) is fixedly connected to the telescopic end of the electric push rod (405); the positioning roller (403) is divided into two sections and fixedly connected to the rotating shaft (404); the first driven gear (407) is fixedly connected to the surface of the rotating shaft (404) and is located between the two sections of the positioning roller (403); and the first driving gear (409) is fixedly connected to the output end of the first motor (408) and meshes with the first driven gear (407).

4. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The fixing frame (401) is in an "L" shape as a whole. Two baffles are symmetrically fixedly connected to the horizontal section of the fixing frame (401) in the front and rear directions. The rotating shaft (404) is rotatably connected between the two baffles. A gap is provided between the baffles and the vertical section of the fixing frame (401). The fixing portion of the electric push rod (405) is fixedly connected to the vertical section of the fixing frame (401).

5. The tumor radiotherapy bed with positioning function according to claim 2, characterized in that: The bottom of the limit block (4010) and the top of the tooth plate (6) are both arranged in a sawtooth shape, and the bottom of the limit block (4010) and the top of the tooth plate (6) are snap-fitted.

6. The tumor radiotherapy bed with positioning function according to claim 2, characterized in that: The guide rods (4012) are distributed at the four corners of the top block (4011), and the cross-sectional shape, position and number of the guide rods (4012) correspond to the cross-sectional shape, position and number of the guide grooves (406).

7. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The top block (4011) and the spring (4013) are symmetrically arranged with the connecting piece as the center, and the top of the top block (4011) is in close contact with the inner top of the slide groove (3).

8. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The moving component comprises a second motor (11), a second driving gear (12), a second driven gear (15), a screw rod (9) and a nut (13); the second motor (11) is fixedly connected to the top of the lifting component (5); the nut (13) is connected to the screw rod (9) by means of a thread; and the second driving gear (12) is fixedly connected to the output end of the second motor (11).

9. The tumor radiotherapy bed with positioning function according to claim 8, characterized in that: The top of the lifting component (5) is fixedly connected to a positioning frame (14), the positioning frame (14) is fixedly connected to a bearing, the inner surface of the bearing is fixedly connected to the outer surface of the nut (13), the two ends of the screw rod (9) are fixedly connected to the bottom of the bed board (2), and the second driving gear (12) is meshed with the second driven gear (15).

10. The tumor radiotherapy bed with positioning function according to claim 1, characterized in that: The bottom of the bed board (2) is symmetrically and fixedly connected with a slide rail (7), and the top of the lifting component (5) is provided with a plurality of pulleys (8), and the slide rail (7) and the pulleys (8) are slidably matched.

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