Radiotherapy positioning device for tumors

Abstract

The invention belongs to the technical field of radiotherapy medical treatment, and discloses a tumor radiotherapy positioning device, which comprises a limb positioning top cover and a limb positioning bottom cover, and is characterized in that a limb positioning cover is arranged between the limb positioning top cover and the limb positioning bottom cover through a clamping plate in a buckling manner; according to the invention, when the swing arm swings, alternate exhaust of the two exhaust pistons is realized, so that the softened positioning thermoplastic film is wrapped and attached to the tumor radiotherapy limb, and the tumor radiotherapy limb can be positioned by the positioning thermoplastic film. According to the limb positioning top cover, pressurization continuity and stability in the limb positioning top cover are achieved, in the swinging process, abutting rolling is achieved when the positioning thermoplastic film is softened to wrap the limb, therefore, the fitting degree of the positioning thermoplastic film to limb wrapping positioning is guaranteed, and by means of the protection pressure discharging assembly, the situation that the limb positioning is uncomfortable due to the fact that the wrapping pressure of the positioning thermoplastic film is too large is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of radiotherapy medical treatment, and in particular relates to a radiotherapy positioning device for tumors. Background Art

[0002] Radiotherapy is the use of one or more types of ionizing radiation to treat malignant tumors and some benign diseases. The means of radiotherapy is ionizing radiation. Tumor radiotherapy uses radiation such as α, β, γ rays and various types of x-rays produced by radioactive isotopes. Radiotherapy can be used for almost all cancer treatments. For many cancer patients, radiotherapy is the only necessary treatment method.

[0003] The existing technology has the following problems: tumor radiotherapy positioning refers to the marking and positioning of the tumor. Specifically, it is to let the patient lie flat and maintain a uniform posture each time he lies flat, so as to ensure the rapid positioning of the radiotherapy target head during subsequent radiotherapy, and then achieve precise positioning (the benefit of precise positioning is to avoid irradiation and damage to healthy tissues and cells, and to irradiate tumor cells as much as possible). However, in actual use, the positioning of the patient's limb is maintained by a thermoplastic film, that is, the thermoplastic film is used to achieve specific posture positioning that varies from person to person. When used by medical staff, the thermoplastic film is first softened by heat, and then the softened thermoplastic film is laid on the patient's cancerous limb, and a customized limb positioning mold is obtained after cooling. While waiting for cooling, the medical staff must continue to press to make the thermoplastic film fit the cancerous limb as closely as possible to achieve positioning. This process is relatively cumbersome and requires simultaneous collaboration of multiple medical staff, which increases the difficulty of mold making and positioning. Therefore, this problem is urgently needed. Summary of the invention

[0004] In order to solve the problem of difficulty in modeling and positioning mentioned in the above background technology, the present invention provides a tumor radiotherapy positioning device, which has the characteristics of convenient modeling and positioning.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a radiotherapy positioning device for tumors, comprising a limb positioning top cover and a limb positioning bottom cover, a limb positioning cover is arranged between the limb positioning top cover and the limb positioning bottom cover through a clamping plate, a positioning thermoplastic film and a heat-insulating gauze are arranged inside the limb positioning cover, a U-shaped frame and a piston chamber are respectively arranged at the top center and both ends of the limb positioning top cover, a driving motor is arranged at the top of the U-shaped frame, an air inlet pipe and an air outlet pipe with a one-way valve are arranged on the outside of the piston chamber, a limb positioning cover unit for tumor radiotherapy is formed between the limb positioning top cover, the limb positioning cover and the limb positioning bottom cover, and the driving motor at the top of the limb positioning top cover drives a disk assembly The double-pendulum piston assembly is driven reciprocatingly by the double-piston component. During the reciprocating double-piston driving process of the double-pendulum piston assembly, both ends of the double-pendulum piston assembly deliver air to the inside of the limb positioning top cover to increase pressure and make the positioning thermoplastic film fit and wrap around the outside of the limb to achieve limb positioning and fixation. The double-pendulum piston assembly drives two groups of rolling arm assemblies arranged on the inner wall of the limb positioning top cover to perform synchronous and reverse rolling and abutting actions through the reciprocating arm assembly. The synchronous and reverse rolling and abutting actions of the rolling arm assemblies increase the fit between the positioning thermoplastic film and the tumor radiotherapy limb during wrapping and positioning. A protective pressure relief assembly is provided on one side of the limb positioning top cover for protective pressure relief protection during pressurization, wrapping and positioning of the tumor radiotherapy limb.

[0006] In a preferred embodiment of a radiotherapy positioning device for tumors, the drive disk assembly includes a drive disk, a drive top shaft on the top of the drive disk is connected to the output shaft of the drive motor, and a drive rod is fixedly arranged at the bottom of the drive disk, and the drive rod is arranged at the edge of the disk body at the bottom of the drive disk.

[0007] In a preferred embodiment of a radiotherapy positioning device for tumors, the double-pendulum piston assembly includes a swing shaft, and a swing arm and a swing gear are fixedly arranged on the top and bottom of the swing shaft respectively. A swing groove is provided on the swing arm, and both sides of the swing arm are hingedly pulled with a pumping piston through a linkage arm.

[0008] In a preferred embodiment of a radiotherapy positioning device for a tumor, the reciprocating arm assembly includes a first reciprocating tooth arm and a second reciprocating tooth arm, the bottom of the first reciprocating tooth arm and the second reciprocating tooth arm are respectively fixed with a second reciprocating drive tooth arm and a first reciprocating drive tooth arm through side arms, and the back of the first reciprocating tooth arm and the second reciprocating tooth arm are both fixed with a T-shaped slider, and the first reciprocating tooth arm and the second reciprocating tooth arm are mirror-symmetrically arranged in a limb positioning top cover.

[0009] In a preferred embodiment of a radiotherapy positioning device for tumors, the rolling arm assembly includes a first main arm and multiple second main arms, the first main arm and the multiple second main arms are both slidably provided with auxiliary arms, the bottom of the auxiliary arms are fixedly provided with a pushing table and a rolling wheel, the auxiliary arms are sleeved with a pushing spring, the tops of the second main arms and the first main arms are rotatably provided on the inner wall of the limb positioning top cover through multiple top shafts and bearings, the top shaft of the top of the first main arm is fixedly provided with a top gear, a driven side arm is hingedly provided between the first main arm and the second main arm, and a driven side arm is hingedly provided between two adjacent second main arms.

[0010] In a preferred embodiment of a radiotherapy positioning device for tumors, the protective pressure relief assembly includes a protective tube, an annular hole platform is provided on the inner wall of one end of the protective tube, and a pressure relief side groove is provided on the outer wall of the protective tube at the same end; a sealed piston is provided at the other end of the protective tube through the pushing of a sealed spring, and the sealed piston is pressed and sealed on the annular hole platform through the pushing of the sealed spring.

[0011] In a preferred embodiment of a radiotherapy positioning device for tumors, a heating rod for heating and softening the positioning thermoplastic film is provided on the top inner wall of the limb positioning top cover, the one-way valve on the air inlet pipe allows external gas to enter the piston chamber but not exit, and the one-way valve on the air outlet pipe allows gas in the piston chamber to exit but not enter.

[0012] In a preferred embodiment of a radiotherapy positioning device for tumors, the swing shaft is rotatably arranged on the top cover of the limb positioning top cover, the swing arm is located above the limb positioning top cover, the swing gear is located inside the limb positioning top cover, the drive rod is inserted in the swing groove, the two pumping pistons reciprocate in the two piston chambers, and the drive disk drives the swing arm to swing back and forth on the limb positioning top cover through the cooperation of the drive rod and the swing groove.

[0013] In a preferred embodiment of a radiotherapy positioning device for tumors, the first reciprocating tooth arm and the second reciprocating tooth arm are slidably arranged on the inner wall of the limb positioning top cover through a T-shaped slider and a slide groove on the inner wall of the limb positioning top cover, the swing gear and the first reciprocating tooth arm and the second reciprocating tooth arm are on the same horizontal plane, and the two sides of the swing gear are respectively meshed with the first reciprocating tooth arm and the second reciprocating tooth arm. Through the reciprocating swing of the swing gear and the coordination of the above-mentioned meshing relationship, the linear reciprocating sliding of the second reciprocating drive tooth arm and the first reciprocating drive tooth arm inside the limb positioning top cover is realized.

[0014] In a preferred embodiment of a radiotherapy positioning device for tumors, the first main arm and multiple second main arms form a synchronous and interlocking abutment arm structure inside the limb positioning top cover through multiple driven side arms, and the two groups of rolling arm assemblies are mirror-imaged inside the limb positioning top cover, the second reciprocating drive tooth arm is meshed with the top gear on one group of rolling arm assemblies, and the first reciprocating drive tooth arm is meshed with the top gear on the other group of rolling arm assemblies. Through the linear reciprocating sliding of the second reciprocating drive tooth arm and the first reciprocating drive tooth arm inside the limb positioning top cover, the synchronous reverse rolling swing of the two groups of rolling arm assemblies inside the limb positioning top cover is realized.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is in use, a limb positioning cover unit for tumor radiotherapy is formed between the limb positioning top cover, the limb positioning cover and the limb positioning bottom cover. The positioning cover unit is set on the limb for tumor radiotherapy. The driving motor drives the swing arm to swing back and forth by driving the driving disk assembly. When the swing arm swings, an alternating exhaust structure of two exhaust pistons is realized. In this way, air supply and pressurization inside the limb positioning top cover are realized, so that the softened positioning thermoplastic film is wrapped and attached to the limb for tumor radiotherapy. Through this alternating exhaust and pumping, it can be ensured that when the swing arm swings, gas is always continuously supplied to the limb positioning top cover, so as to achieve continuity and stability of pressurization in the limb positioning top cover.

[0016] 2. During the swinging process, the present invention realizes the synchronous reverse rolling swing of the two groups of rolling arm assemblies inside the limb positioning top cover through the cooperation of the reciprocating arm assembly and the rolling arm assembly. In this way, the softening of the positioning thermoplastic film and the rolling pressure on the limb wrapping are realized, thereby ensuring the fit of the positioning thermoplastic film to the limb wrapping positioning.

[0017] 3. The present invention provides a protective pressure relief assembly. When the pressure in the limb positioning top cover is too high, the air pressure will overcome the thrust of the sealing spring to lift the sealing piston. At this time, the pressure relief side groove is exposed. At this time, the excessive air pressure inside the limb positioning top cover will be discharged through the pressure relief side groove, thereby avoiding discomfort in limb positioning for tumor radiotherapy caused by excessive pressure of the positioning thermoplastic film wrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of the present invention; Figure 2 A perspective view of the present invention; Figure 3 A three-dimensional diagram of the internal structure of the limb positioning top cover of the present invention; Figure 4 An exploded view of the drive plate assembly, the double pendulum piston assembly and the reciprocating arm assembly of the present invention; Figure 5A three-dimensional diagram of the drive plate assembly, the double pendulum piston assembly and the reciprocating arm assembly from another perspective of the present invention; Figure 6 It is a front view of the rolling arm assembly of the present invention; Figure 7 It is a cross-sectional view of the protective pressure relief assembly of the present invention; Figure 8 It is an exploded view of the limb positioning top cover, the limb positioning bottom cover and the limb positioning cover of the present invention.

[0019] In the figure: 101, limb positioning top cover; 102, limb positioning bottom cover; 103, limb positioning cover; 104, card plate; 105, piston chamber; 106, U-shaped frame; 107, driving motor; 108, positioning thermoplastic film; 109, heat-insulating gauze; 110, air inlet pipe; 111, air outlet pipe; 200, driving disk assembly; 201, driving disk; 202, driving top shaft; 203, driving rod; 300, double pendulum piston assembly; 301, swing shaft rod; 302, swing slot; 303, swing arm; 304, swing gear; 305, linkage arm; 306, pumping piston; 400, reciprocating arm assembly Parts; 401, first reciprocating tooth arm; 402, first reciprocating drive tooth arm; 403, side arm; 404, T-shaped slider; 405, second reciprocating tooth arm; 406, second reciprocating drive tooth arm; 500, rolling arm assembly; 501, first main arm; 502, auxiliary arm; 503, second main arm; 504, push spring; 505, push round table; 506, rolling wheel; 507, driven side arm; 508, top shaft; 509, top gear; 600, protective pressure relief assembly; 601, protective tube; 602, pressure relief side groove; 603, annular hole table; 604, closed piston; 605, closed spring. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 8As shown, the present invention provides a tumor radiotherapy positioning device, comprising a limb positioning top cover 101 and a limb positioning bottom cover 102, a limb positioning cover 103 is arranged between the limb positioning top cover 101 and the limb positioning bottom cover 102 through a clamping plate 104, a positioning thermoplastic film 108 and a heat-insulating gauze 109 are arranged inside the limb positioning cover 103, a U-shaped frame 106 and a piston chamber 105 are respectively arranged at the top center and both ends of the limb positioning top cover 101, a driving motor 107 is arranged on the top of the U-shaped frame 106, an air inlet pipe 110 and an air outlet pipe 111 with a one-way valve are arranged on the outside of the piston chamber 105, a limb positioning cover unit for tumor radiotherapy is formed between the limb positioning top cover 101, the limb positioning cover 103 and the limb positioning bottom cover 102, and the driving motor 107 on the top of the limb positioning top cover 101 The double pendulum piston assembly 300 is driven in a reciprocating double-piston manner by the driving disc assembly 200. During the reciprocating double-piston driving process of the double pendulum piston assembly 300, both ends of the double pendulum piston assembly 300 supply air to the inside of the limb positioning top cover 101 to increase pressure and make the positioning thermoplastic film 108 fit and wrap around the outside of the limb, thereby realizing limb positioning and fixation. The double pendulum piston assembly 300 drives two sets of rolling arm assemblies 500 arranged on the inner wall of the limb positioning top cover 101 to perform synchronous and reverse rolling and abutting actions through the reciprocating arm assembly 400. Through the synchronous and reverse rolling and abutting actions of the rolling arm assemblies 500, the fit between the positioning thermoplastic film 108 and the tumor radiotherapy limb wrapping and positioning is increased. A protective pressure relief assembly 600 is provided on one side of the limb positioning top cover 101 to provide protective pressure relief protection when the limb is pressurized and wrapped for tumor radiotherapy.

[0022] In a preferred embodiment, please refer to Figure 4 and Figure 5The driving disk assembly 200 includes a driving disk 201, a driving top shaft 202 on the top of the driving disk 201 is connected to the output shaft of the driving motor 107, and a driving rod 203 is fixedly arranged at the bottom of the driving disk 201, and the driving rod 203 is arranged at the edge of the disk body at the bottom of the driving disk 201. The double pendulum piston assembly 300 includes a swing shaft 301, and a swing arm 303 and a swing gear 304 are fixedly arranged on the top and bottom of the swing shaft 301, respectively. A swing groove 302 is opened on the swing arm 303, and both sides of the swing arm 303 are hingedly pulled with a pumping piston 306 through a linkage arm 305. The top inner wall of the limb positioning top cover 101 is provided with a positioning thermoplastic film 108 for tightening The heating rod is softened by heat, and the one-way valve on the air inlet pipe 110 allows external gas to enter the piston chamber 105 but not exit. The one-way valve on the air outlet pipe 111 allows gas in the piston chamber 105 to exit but not enter. The swing shaft 301 is rotatably set on the top cover of the limb positioning top cover 101, the swing arm 303 is located above the limb positioning top cover 101, the swing gear 304 is located inside the limb positioning top cover 101, the drive rod 203 is inserted in the swing groove 302, and the two pumping pistons 306 reciprocate in the two piston chambers 105. The drive disk 201 drives the swing arm 303 to swing back and forth on the limb positioning top cover 101 through the cooperation of the drive rod 203 and the swing groove 302.

[0023] In a preferred embodiment, please refer to Figure 4 and Figure 6The reciprocating arm assembly 400 includes a first reciprocating toothed arm 401 and a second reciprocating toothed arm 405. The bottoms of the first reciprocating toothed arm 401 and the second reciprocating toothed arm 405 are respectively fixedly provided with a second reciprocating drive toothed arm 406 and a first reciprocating drive toothed arm 402 through a side arm 403, and the backs of the first reciprocating toothed arm 401 and the second reciprocating toothed arm 405 are both fixedly provided with a T-shaped slider 404. The first reciprocating toothed arm 401 and the second reciprocating toothed arm 405 are mirror-symmetrically arranged in the limb positioning top cover 101. The first reciprocating toothed arm 401 and the second reciprocating toothed arm 405 slide through the T-shaped slider 404 and the slide groove on the inner wall of the limb positioning top cover 101. The swing gear 304 and the first reciprocating tooth arm 401 and the second reciprocating tooth arm 405 are arranged on the same horizontal plane, and the two sides of the swing gear 304 are respectively meshed with the first reciprocating tooth arm 401 and the second reciprocating tooth arm 405. Through the reciprocating swing of the swing gear 304 and the cooperation of the above meshing relationship, the second reciprocating drive tooth arm 406 and the first reciprocating drive tooth arm 402 can slide back and forth in a straight line inside the limb positioning top cover 101. The rolling arm assembly 500 includes a first main arm 501 and a plurality of second main arms 503. The first main arm 501 and the plurality of second main arms 503 are both provided with sliding arrangement inside. There is a secondary arm 502, the bottom of the secondary arm 502 is fixedly provided with a push round table 505 and a rolling wheel 506, the secondary arm 502 is sleeved with a push spring 504, the second main arm 503 and the top of the first main arm 501 are rotatably arranged on the inner wall of the limb positioning top cover 101 through multiple top shafts 508 and bearings, the top shaft 508 at the top of the first main arm 501 is fixedly provided with a top gear 509, a driven side arm 507 is hingedly provided between the first main arm 501 and the second main arm 503, and a driven side arm 507 is hingedly provided between two adjacent second main arms 503, and the first main arm 501 and multiple second main arms 503 are hingedly provided. A plurality of driven side arms 507 form a synchronous and interlocking abutment arm structure inside the limb positioning top cover 101, and two sets of rolling arm assemblies 500 are mirror-imaged inside the limb positioning top cover 101. The second reciprocating drive tooth arm 406 is meshed with the top gear 509 on one set of rolling arm assemblies 500, and the first reciprocating drive tooth arm 402 is meshed with the top gear 509 on the other set of rolling arm assemblies 500. Through the linear reciprocating sliding of the second reciprocating drive tooth arm 406 and the first reciprocating drive tooth arm 402 inside the limb positioning top cover 101, the synchronous reverse rolling swing of the two sets of rolling arm assemblies 500 inside the limb positioning top cover 101 is realized.

[0024] In a preferred embodiment, please refer to Figure 7The protective pressure relief assembly 600 includes a protective tube 601, an annular hole platform 603 is arranged on the inner wall of one end of the protective tube 601, and a pressure relief side groove 602 is opened on the outer wall of the protective tube 601 at the same end, and a sealed piston 604 is arranged at the other end of the protective tube 601 through the pushing of a sealed spring 605. The sealed piston 604 is pressed against the annular hole platform 603 through the pushing of the sealed spring 605.

[0025] The working principle of the present invention is as follows: when in use, a limb positioning cover unit for tumor radiotherapy is formed between the limb positioning top cover 101, the limb positioning cover 103 and the limb positioning bottom cover 102, and the positioning cover unit is placed on the limb for tumor radiotherapy. At this time, the heating rod on the top of the limb positioning top cover 101 is started to heat and soften the positioning thermoplastic film 108 to prepare for the subsequent wrapping and positioning of the limb, and then the driving motor 107 is started. When the driving motor 107 rotates, the driving disk 201 on the driving disk assembly 200 is driven to rotate, and the driving rod 203 on the driving disk 201 drives the swing arm 303 to swing back and forth above the limb positioning top cover 101 through the swing groove 302. When the swing arm 303 swings back and forth, since the two ends of the swing arm 303 are hinged and pulled by the linkage arm 305, there are two pumping pistons 306, and the two pumping pistons 306 are activated in the two piston chambers 105. The swing arm 303 is swung to and fro in two piston chambers 105, and the reciprocating swing is alternating. Specifically, when the swing arm 303 swings, one pumping piston 306 forms a pumping structure for external gas to enter in one piston chamber 105, and the other pumping piston 306 forms an exhaust structure for internal gas to be discharged into the limb positioning top cover 101 in one piston chamber 105. In this way, the air supply and pressurization inside the limb positioning top cover 101 is realized, so that the softened positioning thermoplastic film 108 is wrapped and attached to the limb for tumor radiotherapy, so as to realize subsequent cooling and positioning. At the same time, through this alternating pumping and exhausting, it can be ensured that when the swing arm 303 swings, the gas is always continuously supplied to the limb positioning top cover 101, so as to realize the continuity and stability of the pressurization in the limb positioning top cover 101.

[0026] On the basis of the above, during the swinging process of the swing arm 303, when the swing arm 303 swings, the swing gear 304 at the bottom of the swing shaft 301 rotates back and forth. When the swing gear 304 rotates back and forth, since the two sides of the swing gear 304 are synchronously meshed with the first reciprocating tooth arm 401 and the second reciprocating tooth arm 405, through the cooperation of the above structure, the second reciprocating drive tooth arm 406 and the first reciprocating drive tooth arm 402 are reciprocated and synchronously reversed linear sliding inside the limb positioning top cover 101 is realized. When the second reciprocating drive tooth arm 406 and the first reciprocating drive tooth arm 402 perform synchronous reciprocating reverse linear sliding, at this time, since the two groups of rolling arm assemblies 500 are mirror-imaged inside the limb positioning top cover 101, the second reciprocating drive tooth arm 406 is meshed with the top gear 509 on one group of rolling arm assemblies 500, and the first reciprocating drive tooth arm 406 and the first reciprocating drive tooth arm 402 are meshed. The toothed arm 402 meshes with the top gear 509 on the other group of rolling arm assemblies 500, and the linear reciprocating sliding of the second reciprocating drive toothed arm 406 and the first reciprocating drive toothed arm 402 inside the limb positioning top cover 101 realizes the synchronous reverse rolling and swinging of the two groups of rolling arm assemblies 500 inside the limb positioning top cover 101. In this way, the positioning thermoplastic film 108 is softened to roll against the limb when wrapping it, thereby ensuring the fit of the positioning thermoplastic film 108 to the limb wrapping positioning. At the same time, the auxiliary arm 502 is tightly arranged in the first main arm 501 and the second main arm 503 of the present invention through the pushing spring 504. Through this elastic arrangement, the rolling wheel 506 at the bottom of the rolling arm assembly 500 is flexibly pressed against the limb for tumor radiotherapy, further ensuring the fit of the positioning thermoplastic film 108 to the limb when wrapping it.

[0027] On the basis of the above, a protective pressure relief assembly 600 is provided on one side of the limb positioning top cover 101 of the present invention, because the wrapping of the limb for tumor radiotherapy by the positioning thermoplastic film 108 is a pressurized wrapping, and this pressurization is achieved on the basis of the continuous swinging of the double-pendulum piston assembly 300. In actual use, the double-pendulum piston assembly 300 swings continuously, which means that the inside of the limb positioning top cover 101 is constantly pressurized. If the pressure is too high, it will cause discomfort in the limb for tumor radiotherapy and affect the patient. The present invention is provided with a protective pressure relief assembly 600. When the pressure in the limb positioning top cover 101 is too high, the air pressure will overcome the top thrust of the sealed spring 605 to lift the sealed piston 604. At this time, the pressure relief side groove 602 is exposed. At this time, the excessive air pressure inside the limb positioning top cover 101 will be discharged through the pressure relief side groove 602, thereby realizing automatic pressure relief, that is, when the pressure reaches a certain value, the pressure relief side groove 602 automatically opens, thereby avoiding discomfort in the limb positioning for tumor radiotherapy caused by excessive wrapping pressure of the positioning thermoplastic film 108.

[0028] It should be emphasized that a snap-fit ​​structure is provided between the limb positioning top cover 101 and the limb positioning bottom cover 102 of the present invention, and the snap-fit ​​structure can ensure the firmness between the limb positioning top cover 101, the limb positioning cover 103 and the limb positioning bottom cover 102. At the same time, the snap-fit ​​structure is a conventional technology in this field, so it will not be elaborated.

[0029] 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 tumor radiotherapy positioning device, comprising a limb positioning top cover (101) and a limb positioning bottom cover (102), characterized in that: A limb positioning cover (103) is provided between the limb positioning top cover (101) and the limb positioning bottom cover (102) by means of a clamping plate (104), a positioning thermoplastic film (108) and a heat-insulating gauze (109) are provided inside the limb positioning cover (103), a U-shaped frame (106) and a piston chamber (105) are provided at the top center and both ends of the limb positioning top cover (101), a driving motor (107) is provided at the top of the U-shaped frame (106), an air inlet pipe (110) and an air outlet pipe (111) with a one-way valve are provided outside the piston chamber (105), and the driving motor (107) ) drives the double-pendulum piston assembly (300) in a reciprocating double-piston manner through a driving disc assembly (200); both ends of the double-pendulum piston assembly (300) deliver air to the interior of a limb positioning top cover (101) to increase pressure and make the positioning thermoplastic film (108) fit and wrap around the outside of the limb, thereby achieving limb positioning and fixation; the double-pendulum piston assembly (300) drives two sets of rolling arm assemblies (500) to perform synchronous reverse rolling and abutting actions through a reciprocating arm assembly (400); and a protective pressure relief assembly (600) is provided on one side of the limb positioning top cover (101) for providing protective pressure relief protection when the limb is pressurized, wrapped and positioned for tumor radiotherapy.

2. A tumor radiotherapy positioning device according to claim 1, characterized in that: The drive disk assembly (200) comprises a drive disk (201), a drive top shaft (202) at the top of the drive disk (201) being connected to an output shaft of a drive motor (107), and a drive rod (203) being fixedly arranged at the bottom of the drive disk (201), the drive rod (203) being arranged at an edge disk body at the bottom of the drive disk (201).

3. A tumor radiotherapy positioning device according to claim 2, characterized in that: The double pendulum piston assembly (300) comprises a swing shaft (301), the top and bottom of the swing shaft (301) are respectively fixedly provided with a swing arm (303) and a swing gear (304), the swing arm (303) is provided with a swing groove (302), and both sides of the swing arm (303) are hingedly pulled with a pumping piston (306) via a linkage arm (305).

4. A tumor radiotherapy positioning device according to claim 3, characterized in that: The reciprocating arm assembly (400) comprises a first reciprocating toothed arm (401) and a second reciprocating toothed arm (405); the bottoms of the first reciprocating toothed arm (401) and the second reciprocating toothed arm (405) are respectively fixedly provided with a second reciprocating drive toothed arm (406) and a first reciprocating drive toothed arm (402) via side arms (403); the backs of the first reciprocating toothed arm (401) and the second reciprocating toothed arm (405) are both fixedly provided with a T-shaped slider (404); the first reciprocating toothed arm (401) and the second reciprocating toothed arm (405) are mirror-symmetrically arranged in a limb positioning top cover (101).

5. A tumor radiotherapy positioning device according to claim 4, characterized in that: The rolling arm assembly (500) comprises a first main arm (501) and a plurality of second main arms (503); auxiliary arms (502) are slidably arranged inside the first main arm (501) and the plurality of second main arms (503); a top-thrusting table (505) and a rolling wheel (506) are fixedly arranged at the bottom of the auxiliary arms (502); a top-thrusting spring (504) is sleeved on the auxiliary arm (502); the tops of the second main arms (503) and the first main arms (501) are rotatably arranged on the inner wall of the limb positioning top cover (101) through a plurality of top shafts (508) and bearings; a top gear (509) is fixedly arranged on the top shaft (508) at the top of the first main arm (501); a driven side arm (507) is hingedly arranged between the first main arm (501) and the second main arms (503); and a driven side arm (507) is hingedly arranged between two adjacent second main arms (503).

6. A tumor radiotherapy positioning device according to claim 1, characterized in that: The protective pressure relief assembly (600) comprises a protective tube (601), an annular hole platform (603) is arranged on the inner wall of one end of the protective tube (601), and a pressure relief side groove (602) is opened on the outer wall of the protective tube (601) at the same end; a sealed piston (604) is arranged at the other end of the protective tube (601) through the pushing of a sealed spring (605), and the sealed piston (604) is pressed against the annular hole platform (603) through the pushing of the sealed spring (605).

7. A tumor radiotherapy positioning device according to claim 1, characterized in that: The limb positioning top cover (101), the limb positioning cover (103) and the limb positioning bottom cover (102) form a limb positioning cover unit during tumor radiotherapy. The top inner wall of the limb positioning top cover (101) is provided with a heating rod for heating and softening the positioning thermoplastic film (108). The one-way valve on the air inlet pipe (110) enables external gas to only enter but not exit the piston chamber (105). The one-way valve on the air outlet pipe (111) enables gas in the piston chamber (105) to only exit but not enter.

8. A tumor radiotherapy positioning device according to claim 3, characterized in that: The swing shaft (301) is rotatably arranged on a top cover body of the limb positioning top cover (101); the swing arm (303) is located above the limb positioning top cover (101); the swing gear (304) is located inside the limb positioning top cover (101); the drive rod (203) is inserted into the swing groove (302); the two pumping pistons (306) reciprocate in the two piston chambers (105); and the drive disc (201) drives the swing arm (303) to swing reciprocally on the limb positioning top cover (101) through the cooperation of the drive rod (203) and the swing groove (302).

9. A tumor radiotherapy positioning device according to claim 4, characterized in that: The first reciprocating toothed arm (401) and the second reciprocating toothed arm (405) are slidably arranged on the inner wall of the limb positioning top cover (101) via a T-shaped slider (404) and a slide groove on the inner wall of the limb positioning top cover (101); the swing gear (304) and the first reciprocating toothed arm (401) and the second reciprocating toothed arm (405) are located on the same horizontal plane; the two sides of the swing gear (304) are respectively meshed with the first reciprocating toothed arm (401) and the second reciprocating toothed arm (405); and the reciprocating swing of the swing gear (304) and the above-mentioned meshing relationship enable the second reciprocating drive toothed arm (406) and the first reciprocating drive toothed arm (402) to slide linearly back and forth inside the limb positioning top cover (101).

10. A tumor radiotherapy positioning device according to claim 5, characterized in that: The first main arm (501) and the plurality of second main arms (503) form a synchronous and linked abutment arm structure inside the limb positioning top cover (101) via the plurality of driven side arms (507); the two groups of rolling arm assemblies (500) are arranged in a mirror-like manner inside the limb positioning top cover (101); the second reciprocating drive toothed arm (406) meshes with a top gear (509) on one group of rolling arm assemblies (500); the first reciprocating drive toothed arm (402) meshes with a top gear (509) on the other group of rolling arm assemblies (500); and the second reciprocating drive toothed arm (406) and the first reciprocating drive toothed arm (402) slide linearly back and forth inside the limb positioning top cover (101), thereby achieving synchronous reverse rolling swing of the two groups of rolling arm assemblies (500) inside the limb positioning top cover (101).

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