Radiotherapy lifting device and radiotherapy frame

Abstract

The present invention relates to a radiotherapy lifting device and a radiotherapy body frame, wherein the radiotherapy lifting device comprises a base, on which a first telescopic member, a second telescopic member, a third telescopic member and a fourth telescopic member are arranged in a cross-distribution along the front-back, left-right directions, and the bottoms of the four telescopic members are hinged to the base, and the base also comprises an upper body support plate and a lower body support plate, which are movably connected to the upper body support plate, the top of the first telescopic member is hinged to the bottom of the free end of the upper body support plate, and the tops of the remaining three telescopic members are hinged to the bottom of the lower body support plate; the problem in the prior art that the radiotherapy body frame is inconvenient to adjust during use, the adjustment accuracy is low, and sometimes multiple adjustments are often required to find the best position, which affects the treatment efficiency, is solved.

Description

Technical Field

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

[0002] Radiotherapy is a treatment method that uses various energies of radiation to irradiate tumors in order to inhibit and kill cancer cells. The purpose of radiotherapy is to continuously improve the local control rate of treatment by increasing the dose in the target area and / or reducing radiation damage to normal tissues around the target area, thereby further improving the survival rate and / or improving the quality of life.

[0003] During radiotherapy, patients are usually placed on a special radiotherapy frame to ensure that the radiation can accurately irradiate the tumor. The frame can be adjusted according to the patient's body shape and tumor location to achieve the best treatment effect. At present, when radiotherapy is given to tumor patients in clinical practice, medical linear accelerators are used for irradiation. The existing radiotherapy frames are mostly adjusted manually by medical staff, which may cause some inconvenience and errors. Sometimes it often takes multiple adjustments to find the best position, affecting the treatment efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a radiotherapy lifting device and a radiotherapy body frame, which are used to solve the problem in the prior art that due to structural defects, the radiotherapy body frame needs to be adjusted manually by medical staff during use, which is inconvenient to adjust and has low adjustment accuracy. Sometimes multiple adjustments are required to find the best position, which affects the treatment efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: On the one hand, a radiotherapy lifting device includes a base, on which a first telescopic member, a second telescopic member, a third telescopic member and a fourth telescopic member are arranged in a cross-distribution along the front-back, left-right directions, and the bottoms of the four telescopic members are hinged to the base, and also include an upper body support plate and a lower body support plate, which are movably connected to each other, the top of the first telescopic member is hinged to the bottom of the free end of the upper body support plate, and the tops of the remaining three telescopic members are hinged to the bottom of the lower body support plate.

[0006] Furthermore, the first telescopic member and the second telescopic member are arranged opposite to each other, the bottoms of the first telescopic member and the second telescopic member are connected to the base through universal joints, the top of the first telescopic member is connected to the upper body support plate through a universal joint, the top of the second telescopic member is connected to the lower body support plate through a universal joint, and the hinge axis between the third telescopic member and the base, the hinge axis between the third telescopic member and the lower body support plate, the hinge axis between the fourth telescopic member and the base, and the hinge axis between the fourth telescopic member and the lower body support plate are all parallel to the length direction of the base.

[0007] Beneficial effect: By designing the above structure, the four telescopic parts can be extended and retracted at the same time, which can drive the upper body support plate and the lower body support plate to rise and fall in the vertical direction. The first telescopic part is extended and retracted, and the other three telescopic parts are stationary, which can drive the upper body support plate to rotate around the lower body support plate, thereby changing the inclination angle of the upper body support plate. The first telescopic part and the third telescopic part are stationary, one of the second telescopic part and the fourth telescopic part is extended, and the other is shortened, so that the left and right angles of the radiotherapy body frame on the horizontal plane can be adjusted to achieve multi-angle irradiation of the tumor site.

[0008] On the other hand, a radiotherapy body frame includes an upper body pad, a lower body pad and the above-mentioned radiotherapy lifting device, the upper body pad and the lower body pad are movably connected, the upper body support plate corresponds to the upper body pad, the upper body support plate is fixed to the bottom of the upper body pad, the lower body support plate corresponds to the lower body pad, the lower body support plate is fixed to the bottom of the lower body pad, a locking mechanism is provided between the upper body pad and the lower body pad, and the locking mechanism can lock and fix the relative position between the upper body pad and the lower body pad.

[0009] The lower body pad is provided with hinged seats on both sides of one end of the upper body pad, and the upper body pad is provided with hinged ears corresponding to the hinged seat, the hinged ears are hinged on the hinged seat, the hinge axis of the hinged ear and the hinged seat is parallel to the width direction of the base, and an extension plate is provided in the middle of one end of the upper body pad close to the lower body pad, a connecting rod is fixedly provided on the extension plate, and mounting blocks are respectively provided on both sides of the lower body pad, and the two ends of the connecting rod respectively pass through the hinged seat and the mounting block in sequence, and the connecting rod and the hinged seat, the connecting rod and the mounting block are all rotatably matched, and the locking mechanism is located in the mounting block.

[0010] Furthermore, an inner cavity is provided inside the mounting block, and the locking mechanism includes an annular fixing seat and a motor, the annular fixing seat and the motor are both fixed to the side wall of the inner cavity, a rotating seat is rotatably installed in the annular fixing seat, a worm wheel is fixedly installed on the rotating seat, a worm that meshes with the worm wheel is fixedly installed on the output end of the motor, a through hole for a connecting rod to pass through is opened on the rotating seat, a plurality of electromagnets are evenly provided on the end face of the rotating seat in the circumferential direction of the through hole, an arc-shaped iron plate is provided between two adjacent electromagnets, the arc-shaped iron plate can move in a direction close to or away from the axis of the through hole, a fixing plate is fixedly installed on the outer side of the arc-shaped iron plate of the rotating seat, and a tension spring is provided between the fixing plate and the arc-shaped iron plate.

[0011] Furthermore, a connecting key is provided on the inner side of the arc-shaped iron plate, and a key slot is provided on the connecting rod corresponding to the connecting key.

[0012] Furthermore, the axes of the annular fixing seat, the rotating seat and the connecting rod are collinear.

[0013] Furthermore, the upper body pad is provided with an adjustable headrest, a gripping rod and an arm restraint strap; the lower body pad is provided with an adjustable waist strap, a shifting column and a foot strap; The upper body pad is provided with a gripping rod slide group and an arm limiter slide group at intervals along the length direction, the gripping rod slide group includes two gripping rod slides distributed on both sides of the upper body pad, the arm limiter slide group includes two arm limiter slides distributed on both sides of the upper body pad, and a headrest slide is provided in the middle of the upper body pad; The lower body pad is provided with a waist strap chute group and a foot strap chute group at intervals along the length direction, the waist strap chute group includes two waist strap chute groups distributed on both sides of the lower body pad, the foot strap chute group includes two foot strap chute groups distributed on both sides of the lower body pad, and a gear column chute is provided in the middle of the lower body pad; All of the slide grooves are slidably connected with sliders, a fixing mechanism is provided between the sliders and the corresponding slide grooves, the top surfaces of the sliders form mounting surfaces, and the headrest, gripping rod, arm limit belt, waist strap, shift column and foot straps are mounted on the mounting surfaces of the corresponding sliders.

[0014] Further, a cavity is provided inside the slider along the sliding direction of the slider, and mounting channels are provided on the left and right side walls of the cavity, and circular holes are opened on the left and right side walls of the slider, and the circular holes are connected to the mounting channels, and the diameter of the circular holes is smaller than the diameter of the mounting channels, and a ball is slidably provided in the mounting channels, and the ball matches the mounting channels, and the fixing mechanism includes a conical block inserted between two ball bearings, and the edge of the conical block contacts the ball bearings, and the conical block can slide in the cavity; The slider is provided with a first mounting cavity at one side of the cavity, the large end of the conical block is provided with a support rod, the support rod penetrates the side wall of the cavity and extends into the first mounting cavity, a first spring is sleeved on the support rod, one end of the first spring is connected to the large end of the conical block, and the other end is connected to the side wall of the cavity, the first spring makes the conical block have a tendency to squeeze the ball, and makes at least a part of the outer side of the ball protrude from the slider through the through hole; A pressing rod is slidably provided in the first installation cavity, one end of the pressing rod protrudes out of the slider, and a first installation groove is opened inside the slider on the outer side of the pressing rod. A fixing ring is fixedly sleeved on the surface of the pressing rod, and the fixing ring is located in the first installation groove. A second spring is sleeved on the surface of the pressing rod, one end of the second spring is connected to the side wall of the first installation groove, and the other end is connected to the fixing ring. A lever is rotatably installed in the first installation cavity, one end of the lever is hinged to the pressing rod, and the other end is hinged to the support rod.

[0015] Further, a second mounting cavity is provided inside the slider on the other side of the cavity, the second mounting cavity is communicated with the cavity, a square block is slidably provided in the second mounting cavity, one end of the square block is provided with a push rod for abutting against the small end of the conical block, and the other end is provided with a third spring, the two ends of the third spring are respectively connected to the square block and the side wall of the second mounting cavity, and the side walls on the left and right sides of the square block are symmetrically provided with long strip grooves, and the long strip grooves are inclined from top to bottom in a direction away from the conical block; A guide groove penetrating the side wall of the slider is opened upward at the high end of the elongated groove corresponding to the top of the second mounting cavity, and a pressing block is slidably arranged in the guide groove, and a U-shaped block is arranged at the bottom of the pressing block, and two relatively free ends of the U-shaped block are respectively slidably embedded in the high ends of the two elongated grooves, and a second mounting groove is arranged on the outer side of the top of the guide groove, and a fourth spring is arranged at the bottom of the pressing block, and the top end of the fourth spring is connected to the bottom of the pressing block, and the bottom end is connected to the side wall of the second mounting groove.

[0016] Beneficial effects of the present invention: 1. By setting a locking mechanism, when the radiotherapy frame needs to be raised or lowered, the locking mechanism locks and fixes the upper body pad and the lower body pad. At this time, the four telescopic parts extend or shorten at the same time, so that the upper body pad and the lower body pad can be raised or lowered in the vertical direction. According to the tumor location, patient height and treatment plan, the height of the frame can be accurately adjusted to align the patient's tumor location with the optimal irradiation angle of the radiation beam, ensuring that the target area is accurately irradiated while reducing the risk of normal tissue exposure. The lifting and lowering are smooth and fast, and the patient's comfort can be ensured during the lifting and lowering process.

[0017] By releasing the locking effect of the locking mechanism, the first telescopic part is extended and retracted, while the other three telescopic parts remain stationary, and the inclination angle of the upper body pad can be adjusted. The inclination of the body frame can be flexibly adjusted to meet the treatment needs of patients of different heights, so that the patient's tumor site can be accurately placed in the optimal irradiation range of the radiation beam, thereby improving the accuracy and effectiveness of the treatment.

[0018] The upper body pad and the lower body pad are locked and fixed by the locking mechanism. At this time, the first telescopic part and the second telescopic part remain stationary, one of the third telescopic part and the fourth telescopic part is extended, and the other is shortened, so that the left and right angles of the radiotherapy body frame on the horizontal plane can be adjusted to achieve multi-angle irradiation of the tumor site.

[0019] Other advantages, objectives and features of the present application will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present application. The objectives and other advantages of the present application can be achieved and obtained through the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a radiotherapy lifting device of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a structural front view of a radiotherapy frame of the present invention; Figure 5 A top view of the structure of a radiotherapy frame of the present invention; Figure 6 It is a partial three-dimensional structural schematic diagram of a radiotherapy frame of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure at B in the middle; Figure 8 It is a structural schematic diagram of a sliding block in a radiotherapy frame of the present invention; Fig. 9 It is a cross-sectional view of a slider in a radiotherapy frame of the present invention; Fig.10 It is a structural schematic diagram of a fixing mechanism in a radiotherapy frame of the present invention; Fig.11 It is a schematic structural diagram of an upper body pad in a radiotherapy frame of the present invention; Fig.12 It is a first cross-sectional view of a mounting block in a radiotherapy frame of the present invention; Fig.13 A second cross-sectional view of a mounting block in a radiotherapy frame of the present invention; Fig.14 It is a schematic diagram of the connection structure between a locking mechanism and a connecting rod in a radiotherapy frame of the present invention; Fig.15 The figure is a schematic structural diagram of a locking mechanism in a radiotherapy frame of the present invention.

[0021] in, Base 11, first telescopic member 12, second telescopic member 13, third telescopic member 14, fourth telescopic member 15, upper body support plate 16, lower body support plate 17, universal joint 18, circular ring 181, U-shaped ring 182, mounting rod 183, mounting plate 184, bolt 185; Upper body pad 2, extension plate 21, hinged support ear 22, headrest 23, headrest slide 24, gripping rod 25, gripping rod slide 26, arm limit belt 27, arm limit belt slide 28, connecting rod 29; Lower body pad 3, hinge seat 31, mounting block 32, inner cavity 321, waist strap 33, waist strap slide 34, shift column 35, shift column slide 36, foot strap 37, foot strap slide 38; Locking mechanism 4, annular fixing seat 41, rotating seat 42, worm wheel 43, worm 44, motor 45, electromagnet 46, arc iron plate 47, mounting sleeve 48, connecting key 49, fixing plate 410, tension spring 411, dovetail block 412; Slider 5, cavity 51, first mounting cavity 52, second mounting cavity 53, first mounting groove 54, guide groove 55, second mounting groove 56, round hole 57; Conical block 61, support rod 62, ball 63, first spring 64; A pressing rod 71, a pressing head 72, a fixing ring 73, a second spring 74, and a lever 75; Square block 81 , push rod 82 , third spring 83 , pressing block 84 , U-shaped block 85 , fourth spring 86 , and long strip groove 87 . DETAILED DESCRIPTION

[0022] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] The adjustment and design of the discharge frame are crucial to ensure the accuracy of treatment and patient comfort. In related technologies, according to the location of the tumor, the height of the patient and the treatment plan, the height of the frame needs to be accurately adjusted to align the patient's tumor location with the optimal irradiation angle of the radiation beam, ensuring that the target area is accurately irradiated while reducing the risk of normal tissue exposure. For example, for patients with chest tumors, if the tumor is located in the upper lobe of the lung, the head position of the frame needs to be appropriately raised; if it is located in the pelvis, the height of the frame needs to be lowered; at the same time, it is found clinically that in order to improve the accuracy and effectiveness of treatment, it is often necessary to adjust the inclination angle of the patient's upper body, and sometimes it is necessary to adjust the lifting device back and forth several times to make the target area reach the optimal irradiation position. For some irregularly shaped tumors, it is necessary to tilt the frame and irradiate from the side or obliquely above to make the rays more evenly distributed on the tumor. However, the current radiotherapy frames are not fast enough, accurate enough, and flexible enough in adjusting the height and inclination, which affects the efficiency of treatment.

[0025] A radiotherapy lifting device, such as Figures 1 to 3As shown, it includes a base 11, and the upper surface of the base 11 is provided with a first telescopic member 12, a second telescopic member 13, a third telescopic member 14 and a fourth telescopic member 15 distributed in a cross shape along the front, back, left and right directions of the base 11, wherein the first telescopic member 12 is arranged opposite to the second telescopic member 13, and the third telescopic member 14 is arranged opposite to the fourth telescopic member 15, the first telescopic member 12 is located in the middle of the front end of the base 11, the second telescopic member 13 is located in the middle of the rear end of the base 11, and the third telescopic member 14 and the fourth telescopic member 15 are symmetrically distributed in the middle of the left and right sides of the base 11. In this embodiment, the telescopic member can be one of an electric telescopic rod, a cylinder, and a hydraulic cylinder. In this embodiment, the four telescopic members are preferably an electric telescopic rod. The bottoms of the four telescopic parts are hinged to the base 11, wherein the bottoms of the first telescopic part 12 and the second telescopic part 13 are connected to the base 11 through a universal joint 18, the top of the first telescopic part 12 is connected to the upper body support plate 16 through the universal joint 18, and the top of the second telescopic part 13 is connected to the lower body support plate 17 through the universal joint 18. In this embodiment, the universal joint 18 includes a circular ring 181 and a U-shaped ring 182 which are fitted together. A mounting rod 183 is integrally formed on the top of the circular ring 181, and one end of the mounting rod 183 is fixed to the upper body support plate 16 / lower body support plate 17 / base 11. A mounting plate 184 is fixed at the opening of the U-shaped ring 182 by a nut, and a bolt connected to the first telescopic part 12 / second telescopic part 13 is provided on the mounting plate 184. With such a structural design, when the first telescopic part 12 is telescoped, a smaller tilt angle of itself can make the upper body support plate 16 rotate to a larger angle, and the adjustment is rapid. The hinge axis between the third telescopic member 14 and the base 11, the hinge axis between the third telescopic member 14 and the lower body support plate 17, the hinge axis between the fourth telescopic member 15 and the base 11, and the hinge axis between the fourth telescopic member 15 and the lower body support plate 17 are all parallel to the length direction of the base 11. The radiotherapy lifting device also includes an upper body support plate 16 and a lower body support plate 17. The upper body support plate 16 and the lower body support plate 17 are hingedly connected, and the hinge axes of the two are parallel to the width direction of the base 11. The top of the first telescopic member 12 is hinged to the bottom of the free end of the upper body support plate 16, and the tops of the remaining three telescopic members are hinged to the bottom of the lower body support plate 17. In this embodiment, the upper body support plate 16 and the lower body support plate 17 are provided to support the upper body pad 2 and the lower body pad 3 and transmit force. On the one hand, a hole is opened on the radiotherapy frame. Multiple slide grooves and several fixing devices for fixing different parts of the patient are provided, so that the overall strength of the radiotherapy frame is reduced. The radiotherapy frame is supported by the upper body support plate 16 and the lower body support plate 17, and the support stability is better. On the other hand, when the upper body pad 2 and the lower body pad 3 are locked and fixed and then lifted or lowered, the locking nodes and hinge nodes of the two will be subject to greater stress. At this time, the hinge nodes of the upper body support plate 16 and the lower body support plate 17 can share part of the stress, thereby extending the service life of the entire device.

[0026] The present invention also provides a radiotherapy frame, such as Figures 1 to 15 As shown, the radiotherapy body frame includes an upper body pad 2, a lower body pad 3 and the above-mentioned radiotherapy lifting device, and the radiotherapy lifting device is arranged at the bottom of the upper body pad 2 and the lower body pad 3. The upper body pad 2 and the lower body pad 3 are movably connected, the upper body support plate 16 corresponds to the upper body pad 2, and the upper body support plate 16 is fixed to the bottom of the upper body pad 2, the lower body support plate 17 corresponds to the lower body pad 3, and the lower body support plate 17 is fixed to the bottom of the lower body pad 3, and a locking mechanism 4 is arranged between the upper body pad 2 and the lower body pad 3, and the locking mechanism 4 can lock and fix the relative position between the upper body pad 2 and the lower body pad 3. In this embodiment, if the connection between the upper body pad 2 and the lower body pad 3 is only hinged, when the four telescopic parts rise at the same time, the upper body pad 2 will drive the first telescopic part 12 to deflect to the right while rising vertically, causing the rising position of the radiotherapy frame to shift, the positioning accuracy of the patient's tumor site is poor, the rising stability is poor, and the patient's comfort is reduced. In this embodiment, a locking mechanism is provided, so that the upper body pad 2 and the lower body pad 3 can be locked and fixed as a whole. At this time, the lifting and lowering can accurately adjust the height of the frame, so that the patient's tumor site is aligned with the optimal irradiation angle of the radiation beam, ensuring that the target area is accurately irradiated, while reducing the risk of normal tissue exposure. The lifting and lowering are smooth and fast, and the patient's comfort can be ensured during the lifting and lowering process.

[0027] The lower body pad 3 is fixed with hinge seats 31 on both sides of one end close to the upper body pad 2, and the upper body pad 2 is fixed with hinge ears 22 corresponding to the hinge seats 31. The hinge ears 22 are hinged on the hinge seats 31, and the hinge axis of the hinge ears 22 and the hinge seats 31 is parallel to the width direction of the base 11. An extension plate 21 is provided in the middle of one end of the upper body pad 2 close to the lower body pad 3, and a connecting rod 29 is fixedly penetrated on the extension plate 21. The left and right sides of the lower body pad 3 are respectively fixed with mounting blocks 32, and the two ends of the connecting rod 29 respectively penetrate the hinge seat 31 and the mounting block 32 in sequence. The connecting rod 29 and the hinge seat 31, and the connecting rod 29 and the mounting block 32 are all rotationally matched, and the locking mechanism 4 is located in the mounting block 32. In this embodiment, the axis of the connecting rod 29, the hinge axis of the hinge ear 22 and the hinge seat 31 are colinear. By setting an extension plate 21, the extension plate 21 is flush with the upper body pad 2, which can provide a support point for the patient's body, fill the gap at the hinge between the upper body pad 2 and the lower body pad 3, and increase the comfort of the patient lying on his back on the radiotherapy frame.

[0028] In this embodiment, due to installation requirements, the mounting block 32 needs to be set to a larger size relative to the connecting rod 29, so the mounting blocks 32 are set on both sides of the lower body pad 3 to obtain a larger installation space to meet the installation requirements of the mounting blocks 32.

[0029] An inner cavity 321 is provided inside the mounting block 32, and the locking mechanism 4 includes an annular fixing seat 41 and a motor 45. The annular fixing seat 41 and the motor 45 are fixed to the side wall of the inner cavity 321 by bolts. A rotating seat 42 is rotatably installed in the annular fixing seat 41 through a bearing, one end of the rotating seat 42 protrudes outside the annular fixing seat 41 and a worm gear 43 is fixedly installed on the rotating seat 42, and a worm 44 meshing with the worm gear 43 is fixedly installed on the output end of the motor 45. A through hole for the connecting rod 29 to pass through is opened on the rotating seat 42, and a plurality of electromagnets 46 are evenly provided on the end surface of the rotating seat 42 in the circumferential direction of the through hole, and an arc-shaped iron plate 47 is provided between each adjacent two electromagnets 46, and the arc-shaped iron plate 47 can move in a direction close to or away from the axis of the through hole, and a fixing plate 410 is fixedly installed on the outer side of the arc-shaped iron plate 47 of the rotating seat 42, and a tension spring 411 is provided between the fixing plate 410 and the arc-shaped iron plate 47. In this embodiment, there are preferably two electromagnets 46 and arc-shaped iron plates 47. The electromagnet 46 is energized so that it has magnetic force, and the arc-shaped iron plate 47 is adsorbed by the magnetic force, so that the connecting rod 29 in the through hole is clamped and fixed by the arc-shaped iron plate 47. When the electromagnet 46 is not energized, under the action of the tension spring 411, the two arc-shaped iron plates 47 are away from the connecting rod 29, and the clamping effect disappears.

[0030] A connection key 49 is fixedly provided on the inner side of each arc-shaped iron plate 47, and a key slot is provided on the connection rod 29 corresponding to each connection key 49. By providing the key slot and the connection key 49, when the electromagnet 46 is energized, the connection key 49 can be inserted into the corresponding key slot, so that the upper body pad 2 and the lower body pad 3 are securely locked together, and the axes of the annular fixed seat 41, the rotating seat 42 and the connection rod 29 are collinear. In this embodiment, a dovetail slot is provided at one end of the arc-shaped iron plate 47 close to the rotating seat 42, and a dovetail block 412 matching the dovetail slot is provided on the rotating seat 42, and the arc-shaped iron plate 47 is slidably installed on the dovetail block 412. With such a structural design, the arc-shaped iron plate 47 is stably installed and moves smoothly.

[0031] In the above embodiment, the surface of each electromagnet 46 is covered with a mounting sleeve 48 . The mounting sleeve 48 is a hollow structure and the interior is used to mount the electromagnet 46 , thereby providing good protection for the electromagnet 46 . One end of the mounting sleeve 48 is fixed on the rotating seat 42 .

[0032] In the above embodiment, the rotating seat 42 is provided with two threading holes at the corresponding position of each electromagnet 46, and a power cord is connected to the electromagnet 46, and the power cord is passed through the threading hole. In this embodiment, the outer wall of the mounting sleeve 48 is provided with two annular grooves at the end of the threading hole, and an electric ring is installed in the annular groove. The power cord is electrically connected to the corresponding electric ring. An electric pole fixture is also installed on the mounting seat, and an electric pole fixture is installed with an electric pole at the corresponding position of the electric ring, and the free end of the electric pole is in contact with the corresponding electric ring.

[0033] In the above embodiment, when the radiotherapy frame needs to be lifted vertically, the electromagnet 46 is energized, the arc-shaped iron plate 47 clamps and fixes the connecting rod 29, and the connecting key 49 is inserted into the corresponding key slot to lock and fix the upper body pad 2 and the lower body pad 3. At this time, the four telescopic parts are extended and retracted at the same time, so that the radiotherapy frame can be controlled to lift quickly, accurately and smoothly. When it is lifted to a specified height, the electromagnet 46 is powered off, and under the action of the tension spring 411, the two arc-shaped iron plates 47 are away from the connecting rod 29, and the clamping effect disappears. At this time, the upper body pad 2 is hinged to the lower body pad 3, and the upper body pad 2 is hinged to the lower body pad 3 through the first telescopic part. 12 is extended and retracted, and the inclination angle of the upper body pad 2 can be accurately controlled. If the upper body pad 2 needs to be raised and lowered again to adjust the tumor position after being tilted by a predetermined angle, the motor 45 rotates at this time, driving the worm 44 and the worm wheel 43 to rotate, thereby driving the rotating seat 42, the arc-shaped iron plate 47 and the electromagnet 46 to rotate. When the arc-shaped iron plate 47 rotates until the connecting key 49 is aligned with the key slot, the electromagnet 46 is energized again, and the upper body pad 2 is restored to be locked and fixed with the lower body pad 3, and the vertical height of the radiotherapy frame can be continuously adjusted to align the patient's tumor site with the optimal irradiation angle of the radiation beam. It should be noted that, since the motor 45 needs to rotate to drive the arc-shaped iron plate 47 to rotate so that the connecting key 49 is aligned with the key slot, an angle sensor (not shown in the figure) and a controller can be set in this embodiment, wherein the angle sensor can be set in the middle position of the bottom of the upper body pad 2 or the upper body support plate 16, and is used to sense the inclination angle of the upper body pad 2. The angle sensor and the motor 45 are both electrically connected to the controller. The angle sensor feeds back the data of the rotation angle of the upper body pad 2 to the controller, and the controller can control the motor 45 to drive the arc-shaped iron plate 47 to rotate until the connecting key 49 is aligned with the key slot.

[0034] The upper body pad 2 is provided with an adjustable headrest 23, a gripping rod 25 and an arm limiter 27, and the lower body pad 3 is provided with an adjustable waist strap 33, a shifting column 35 and a foot strap 37. In this embodiment, the structures of the headrest 23, the gripping rod 25, the arm limiter 27, the waist strap 33, the shifting column 35 and the foot strap 37 are known in the prior art and are fully disclosed, and will not be elaborated herein.

[0035] The upper body pad 2 is provided with a gripping rod slide group and an arm limiter slide group at intervals along the length direction. The gripping rod slide group includes two gripping rod slides 26 distributed on both sides of the upper body pad 2, and the arm limiter slide group includes two arm limiter slides 28 distributed on both sides of the upper body pad 2. A headrest slide 24 is provided in the middle of the upper body pad 2; the lower body pad 3 is provided with a waist strap slide group and a foot strap slide group at intervals along the length direction. The waist strap slide group includes two The lower body pad 3 has a waist strap chute 34, and the foot strap chute group includes two foot strap chute 38 distributed on both sides of the lower body pad 3, and a shift column chute 36 is provided in the middle of the lower body pad 3; all the chute are slidably connected with a slider 5, and a fixing mechanism is provided between the slider 5 and the corresponding chute. The top surface of the slider 5 forms a mounting surface, and the headrest 23, the gripping rod 25, the arm limit belt 27, the waist strap 33, the shift column 35 and the foot strap 37 are installed on the mounting surface of the corresponding slider 5. Through the fixing mechanism, the headrest 23, the gripping rod 25, the arm limit belt 27, the waist strap 33, the shift column 35 and the foot strap 37 can be quickly adjusted and positioned.

[0036] The interior of the slider 5 is provided with a cavity 51 along the sliding direction of the slider 5 (i.e., the length direction of the base 11), and the side walls on the left and right sides of the cavity 51 are provided with mounting channels. The side walls on the left and right sides of the slider 5 are provided with round holes 57, and the round holes 57 are connected to the mounting channels. The diameter of the round holes 57 is smaller than the diameter of the mounting channels. A ball 63 is slidably arranged in the mounting channels, and the ball 63 matches the mounting channels. The fixing mechanism includes a conical block 61 inserted between the two balls 63, and the edge of the conical block 61 is in sliding frictional contact with the ball 63. The conical block 61 can slide in the cavity 51, thereby squeezing the ball 63 so that the outer side of the ball 63 protrudes outside the round hole 57 and abuts against the side wall of the slide groove, so that the relative position of the slider 5 and the slide groove can be fixed; The slider 5 has a first installation cavity 52 on the left side of the cavity 51. The large end of the conical block 61 is provided with a support rod 62, which penetrates the side wall of the cavity 51 and extends into the first installation cavity 52. ​​A first spring 64 is sleeved on the support rod 62. The right end of the first spring 64 is fixedly connected to the large end of the conical block 61, and the left end is fixedly connected to the side wall of the cavity 51. In the natural state, the first spring 64 is in a compressed state, and the first spring 64 makes the conical block 61 have a tendency to squeeze the ball 63. A pressing rod 71 is slidably provided in the first mounting cavity 52, one end of the pressing rod 71 protrudes from the outside of the slider 5 and is fixed with a pressing head 72, a first mounting groove 54 is opened inside the slider 5 in the circumferential direction of the pressing rod 71, a fixing ring 73 is fixedly sleeved on the surface of the pressing rod 71, the fixing ring 73 is located in the first mounting groove 54, a second spring 74 is sleeved on the surface of the pressing rod 71, the right end of the second spring 74 is fixedly connected to the side wall of the first mounting groove 54, and the left end is fixedly connected to the fixing ring 73, a lever 75 is rotatably installed in the first mounting cavity 52, one end of the lever 75 is hinged to the pressing rod 71, and the other end is hinged to the support rod 62.

[0037] In this embodiment, by pressing the pressing rod 71, the pressing rod 71 moves toward the inside of the slider 5, and the pressing rod 71 drives the support rod 62 and the tapered block 61 to move to the left through the lever 75. The squeezing effect of the tapered block 61 on the ball 63 is weakened or disappears. The pressing rod 71 is kept pressed, and the slider 5 can slide easily in the slide groove to adjust the position of the slider 5. After the adjustment is in place, the pressing rod 71 is released, and the pressing rod 71 returns to its original position under the action of the second spring 74. The tapered block 61 returns to its original position under the action of the first spring 64, and squeezes the ball 63 again, so that the ball 63 is against the side wall of the slide groove, and the slider 5 completes the positioning. The structure is ingenious, and the adjustment and positioning of the slider 5 is convenient and quick.

[0038] A second mounting cavity 53 is provided inside the slider 5 on the right side of the cavity 51. The second mounting cavity 53 is communicated with the cavity 51. A square block 81 is slidably provided in the second mounting cavity 53. A push rod 82 for abutting against the small end of the tapered block 61 is fixedly provided at the left end of the square block 81, and a third spring 83 is provided at the right end. The two ends of the third spring 83 are respectively fixedly connected to the square block 81 and the side wall of the second mounting cavity 53. The side walls on the left and right sides of the square block 81 are symmetrically provided with long strip grooves 87. The long strip grooves 87 are inclined from top to bottom in the direction away from the tapered block 61, that is, the extension square of the long strip grooves 87 is the direction of the line connecting the upper left corner and the lower right corner of the side wall of the square block 81. A guide groove 55 penetrating the side wall of the slider 5 is opened upward at the high end of the long groove 87 corresponding to the top of the second mounting cavity 53, and a pressing block 84 is slidably arranged in the guide groove 55. The upper surface of the pressing block 84 is flush with the upper surface of the slider 5, and the upper surface of the slider 5 is flush with the upper surface of the lower body pad 3. A U-shaped block 85 is provided at the bottom of the pressing block 84, and the two relatively free ends of the U-shaped block 85 are respectively slidably embedded in the high ends of the two long grooves 87. A second mounting groove 56 is provided on the outer side of the top of the guide groove 55, and a fourth spring 86 is provided at the bottom of the pressing block 84. The top of the fourth spring 86 is fixedly connected to the bottom of the pressing block 84, and the bottom end is fixedly connected to the side wall of the second mounting groove 56.

[0039] The pressing block 84 is pressed downwardly and moves downwardly in the vertical direction under the guidance of the guide groove 55. The square block 81 moves leftward (i.e. moves toward the conical block 61) under the guidance of the long strip groove 87, thereby pushing the conical block 61 to move leftward through the push rod 82. The fixed relationship between the slider 5 and the slide groove can also be released, and the pressing state of the pressing block 84 can be maintained. At this time, the slider 5 can slide easily in the slide groove to adjust the position of the slider 5. After the adjustment is in place, the pressing block 84 is released, and the pressing block 84 returns to its original position under the action of the fourth spring 86. The square block 81 returns to its original position under the joint action of the third spring 83 and the U-shaped block 85. The conical block 61 returns to its original position under the action of the first spring 64, and the ball 63 is squeezed again, so that the ball 63 is against the side wall of the slide groove. The slider 5 completes the positioning. The structure is ingenious, and the adjustment and positioning of the slider 5 is convenient and fast.

[0040] In the above embodiment, by setting a fixing mechanism between the slider 5 and the slide groove, the slider 5 can be positioned in the slide groove, and by setting a first control mechanism on the left side of the slider 5 and a second control mechanism on the right side of the slider 5, the two control mechanisms can independently control the fixing mechanism, so that the fixing mechanism releases the positioning effect of the slider 5 and the slide groove, and the slider 5 can be adjusted and positioned in the slide groove quickly and conveniently. At the same time, when the pressing rod 71 on the left side is located at the end of the slide groove and is inconvenient to press, the position of the slider 5 can be adjusted by pressing the pressing block 84.

[0041] The working principle of the present invention is: In the initial state, the upper body pad 2 is flush with the lower body pad 3, and the patient lies on his back on the radiotherapy frame. According to the patient's height, the position of the positioning slider in the corresponding slide groove is adjusted by the fixing mechanism, so as to realize the rapid adjustment and positioning of the headrest 23, the grasping rod 25, the arm limiter 27, the waist strap 33, the shifting column 35 and the foot strap 37. The patient's head is placed on the headrest 23. If the patient needs to raise his arms during radiotherapy, the position of the grasping rod 25 allows the patient to just grab them, and the patient's upper body is preliminarily fixed. The patient's arms are fixed by the arm limiter 27, the patient's waist or abdomen is positioned by the waist strap 33, the patient is kept on the central axis of the radiotherapy frame by the shifting column 35, and the patient's feet are fixed by the foot strap 37.

[0042] The electromagnet 46 is in the energized state, the arc-shaped iron plate 47 keeps clamping the connecting rod 29, the connecting key 49 is inserted into the key slot, the upper body pad 2 and the lower body pad 3 are locked and fixed, and according to the tumor site, the patient's height and the treatment plan, the four telescopic parts are simultaneously extended and retracted, and the vertical height of the radiotherapy frame can be accurately adjusted to align the patient's tumor site with the optimal irradiation angle of the radiation beam, ensuring that the target area is accurately irradiated while reducing the risk of normal tissue exposure; when the numerical height of the radiotherapy frame reaches the predetermined position, the electromagnet 46 is powered off, the upper body pad 2 is changed to be hinged on the lower body pad, the first telescopic part 12 is extended and retracted, and the other three telescopic parts are stationary, so that the inclination angle of the upper body pad 2 can be adjusted. If the position of the radiotherapy frame still needs to be adjusted after the upper body pad 2 is tilted, the motor 45 rotates so that the connecting key 49 of the arc-shaped iron plate 47 is aligned with the key slot, and the electromagnet 46 is energized again, and the upper body pad 2 and the lower body pad 3 are locked and fixed again, and the above operation can be repeated to continue to adjust the height of the radiotherapy frame. The first telescopic member 12 and the second telescopic member 13 remain stationary, and one of the third telescopic member 14 and the fourth telescopic member 15 is extended, while the other is retracted, so that the left and right angles of the radiotherapy body frame on the horizontal plane can be adjusted to achieve multi-angle irradiation of the tumor site. This tilt adjustment can make the radiation beam incident from different directions, better cover the tumor tissue, improve the local control rate, and reduce the radiation damage to the surrounding normal tissues.

[0043] The radiotherapy lifting device and radiotherapy body frame provided by the present invention can quickly and accurately adjust the height and inclination of the body frame to improve the treatment efficiency. During the adjustment process, the upper body pad 2 and the lower body pad 3 are lifted and lowered smoothly to ensure the accuracy of the treatment and the comfort of the patient. At the same time, the lifting device and the tilting function design at the bottom of the radiotherapy body frame together improve the effect and flexibility of radiotherapy.

[0044] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A radiotherapy lifting device, comprising a base, characterized in that: The base is provided with a first telescopic member, a second telescopic member, a third telescopic member and a fourth telescopic member in a cross distribution along the front-back, left-right directions, and the bottoms of the four telescopic members are hinged to the base, and also include an upper body support plate and a lower body support plate. The upper body support plate and the lower body support plate are movably connected, the top of the first telescopic member is hinged to the bottom of the free end of the upper body support plate, and the tops of the remaining three telescopic members are hinged to the bottom of the lower body support plate.

2. A radiotherapy lifting device according to claim 1, characterized in that: The first telescopic member and the second telescopic member are arranged opposite to each other, the bottoms of the first telescopic member and the second telescopic member are connected to the base through universal joints, the top of the first telescopic member is connected to the upper body support plate through a universal joint, the top of the second telescopic member is connected to the lower body support plate through a universal joint, and the hinge axis between the third telescopic member and the base, the hinge axis between the third telescopic member and the lower body support plate, the hinge axis between the fourth telescopic member and the base, and the hinge axis between the fourth telescopic member and the lower body support plate are all parallel to the length direction of the base.

3. A radiotherapy frame, characterized in that: It includes an upper body pad, a lower body pad and a radiotherapy lifting device as described in any one of claims 1-2, the upper body pad and the lower body pad are movably connected, the upper body support plate corresponds to the upper body pad, the upper body support plate is fixed to the bottom of the upper body pad, the lower body support plate corresponds to the lower body pad, the lower body support plate is fixed to the bottom of the lower body pad, a locking mechanism is provided between the upper body pad and the lower body pad, and the locking mechanism can lock and fix the relative position between the upper body pad and the lower body pad.

4. A radiotherapy frame according to claim 3, characterized in that: The lower body pad is provided with hinged seats on both sides of one end of the upper body pad, and the upper body pad is provided with hinged ears corresponding to the hinged seat, the hinged ears are hinged on the hinged seat, the hinge axis of the hinged ear and the hinged seat is parallel to the width direction of the base, and an extension plate is provided in the middle of one end of the upper body pad close to the lower body pad, a connecting rod is fixedly provided on the extension plate, and mounting blocks are respectively provided on both sides of the lower body pad, and the two ends of the connecting rod respectively pass through the hinged seat and the mounting block in sequence, and the connecting rod and the hinged seat, the connecting rod and the mounting block are all rotatably matched, and the locking mechanism is located in the mounting block.

5. A radiotherapy frame according to claim 4, characterized in that: An inner cavity is provided inside the mounting block, and the locking mechanism includes an annular fixing seat and a motor, the annular fixing seat and the motor are both fixed to the side wall of the inner cavity, a rotating seat is rotatably installed in the annular fixing seat, a worm wheel is fixedly installed on the rotating seat, a worm that meshes with the worm wheel is fixedly installed on the output end of the motor, a through hole for a connecting rod to pass through is opened on the rotating seat, a plurality of electromagnets are evenly arranged on the end face of the rotating seat in the circumferential direction of the through hole, an arc-shaped iron plate is arranged between two adjacent electromagnets, the arc-shaped iron plate can move in a direction close to or away from the axis of the through hole, a fixing plate is fixedly installed on the outer side of the arc-shaped iron plate of the rotating seat, and a tension spring is arranged between the fixing plate and the arc-shaped iron plate.

6. A radiotherapy frame according to claim 5, characterized in that: A connecting key is arranged on the inner side of the arc-shaped iron plate, and a key slot is provided on the connecting rod corresponding to the connecting key.

7. The radiotherapy frame according to claim 5, characterized in that: The axes of the annular fixing seat, the rotating seat and the connecting rod are collinear.

8. The radiotherapy frame according to claim 3, characterized in that: The upper body pad is provided with an adjustable headrest, a gripping rod and an arm restraint strap; the lower body pad is provided with an adjustable waist strap, a shifting column and a foot strap; The upper body pad is provided with a gripping rod slide group and an arm limiter slide group at intervals along the length direction, the gripping rod slide group includes two gripping rod slides distributed on both sides of the upper body pad, the arm limiter slide group includes two arm limiter slides distributed on both sides of the upper body pad, and a headrest slide is provided in the middle of the upper body pad; The lower body pad is provided with a waist strap chute group and a foot strap chute group at intervals along the length direction, the waist strap chute group includes two waist strap chute groups distributed on both sides of the lower body pad, the foot strap chute group includes two foot strap chute groups distributed on both sides of the lower body pad, and a gear column chute is provided in the middle of the lower body pad; All of the slide grooves are slidably connected with sliders, a fixing mechanism is provided between the sliders and the corresponding slide grooves, the top surfaces of the sliders form mounting surfaces, and the headrest, gripping rod, arm limit belt, waist strap, shift column and foot straps are mounted on the mounting surfaces of the corresponding sliders.

9. The radiotherapy frame according to claim 8, characterized in that: The interior of the slider is provided with a cavity along the sliding direction of the slider, and the side walls on the left and right sides of the cavity are provided with mounting channels. The side walls on the left and right sides of the slider are provided with circular holes, and the circular holes are connected to the mounting channels. The diameter of the circular holes is smaller than the diameter of the mounting channels. Balls are slidably arranged in the mounting channels, and the balls match the mounting channels. The fixing mechanism includes a conical block inserted between the two balls, and the edge of the conical block contacts the balls, and the conical block can slide in the cavity; The slider is provided with a first mounting cavity at one side of the cavity, the large end of the conical block is provided with a support rod, the support rod penetrates the side wall of the cavity and extends into the first mounting cavity, a first spring is sleeved on the support rod, one end of the first spring is connected to the large end of the conical block, and the other end is connected to the side wall of the cavity, the first spring makes the conical block have a tendency to squeeze the ball, and makes at least a part of the outer side of the ball protrude from the slider through the through hole; A pressing rod is slidably provided in the first installation cavity, one end of the pressing rod protrudes out of the slider, and a first installation groove is opened inside the slider on the outer side of the pressing rod. A fixing ring is fixedly sleeved on the surface of the pressing rod, and the fixing ring is located in the first installation groove. A second spring is sleeved on the surface of the pressing rod, one end of the second spring is connected to the side wall of the first installation groove, and the other end is connected to the fixing ring. A lever is rotatably installed in the first installation cavity, one end of the lever is hinged to the pressing rod, and the other end is hinged to the support rod.

10. The radiotherapy frame according to claim 9, characterized in that: A second mounting cavity is provided inside the slider on the other side of the cavity, the second mounting cavity is communicated with the cavity, a square block is slidably provided in the second mounting cavity, one end of the square block is provided with a push rod for abutting against the small end of the conical block, and the other end is provided with a third spring, the two ends of the third spring are respectively connected to the square block and the side wall of the second mounting cavity, and the side walls on the left and right sides of the square block are symmetrically provided with long strip grooves, and the long strip grooves are inclined from top to bottom in a direction away from the conical block; A guide groove penetrating the side wall of the slider is opened upward at the high end of the elongated groove corresponding to the top of the second mounting cavity, and a pressing block is slidably arranged in the guide groove, and a U-shaped block is arranged at the bottom of the pressing block, and two relatively free ends of the U-shaped block are respectively slidably embedded in the high ends of the two elongated grooves, and a second mounting groove is arranged on the outer side of the top of the guide groove, and a fourth spring is arranged at the bottom of the pressing block, and the top end of the fourth spring is connected to the bottom of the pressing block, and the bottom end is connected to the side wall of the second mounting groove.

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