Radiotherapy device with protection function for tumor treatment

Abstract

The present application relates to the technical field of medical apparatus and instruments, in particular to a radiotherapy device with protection function for tumor treatment. The radiotherapy device comprises a lifting platform, a first moving platform is slidably arranged on the lifting platform, a second moving platform is slidably connected to the first moving platform, a first electric sliding rail is arranged on the second moving platform, an electric sliding block on the first electric sliding rail is provided with a first electric rotating shaft, a second electric sliding rail is fixedly connected to the first electric rotating shaft, an electric sliding block on the second electric rotating shaft is provided with a second electric rotating shaft, a third electric sliding rail is fixedly connected to the second electric rotating shaft, an electric sliding block on the third electric sliding rail is rotatably connected to a fixing frame, the fixing frame is provided with a third electric rotating shaft, the fixing frame is rotatably connected to a pressing frame, and the third electric rotating shaft is fixedly connected to a supporting frame. The body film is clamped by the pressing frame and the supporting frame, so that the body film is stably attached to the skin of the patient, and the support of the body film is pressed after the body film contacts the second moving platform, so that the position of the body film is ensured not to change.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a radiotherapy device with protective function for tumor treatment. Background Technology

[0002] Radiation therapy is a local treatment method that uses high-energy rays to treat tumors. Before a patient receives radiation therapy, the tumor must be precisely located to minimize radiation deviation caused by patient movement during treatment and to avoid damage to the normal tissue surrounding the tumor.

[0003] Currently, the commonly used body positioning fixation technique uses a personalized thermoplastic membrane, hereinafter referred to as the membrane. The membrane consists of a support frame and a thermoplastic membrane. During the procedure, the staff quickly covers the corresponding part of the patient with the heated and softened membrane. By pressing the support frame of the membrane, the thermoplastic membrane inside is stretched and deformed to closely fit the contour of the patient's body. Subsequently, the thermoplastic membrane inside the membrane cools and hardens, completing the personalized fixation of the patient's body. This ensures that the patient's normal areas will not be affected by radiation due to body movement during radiotherapy, thus protecting the normal areas of the patient's body.

[0004] During the cooling and plasticization process of the body membrane, to prevent displacement caused by the internal stress generated by the cooling and contraction, it is usually necessary to fix the edges of the body membrane. Currently, commonly used fixation devices generally employ a multi-point fixation method to lock the edges of the body membrane. However, this point-by-point fixation method has drawbacks: when the fixation device locks a certain point, other unfixed areas of the body membrane may still experience slight movement due to material stress release or operational disturbances. This accumulated positional deviation during the fixation process will eventually lead to unexpected displacement of some areas of the body membrane, forcing the staff to readjust the shape of the body membrane during or after fixation to correct the deviation. This not only affects the accuracy of the final shaped body membrane but also increases the discomfort and anxiety of the patient due to prolonged immobilization time, affecting the normal progress of the patient's treatment. Summary of the Invention

[0005] The present invention provides a radiotherapy device with protective function for tumor treatment, in order to solve the problems mentioned in the background.

[0006] The technical solution of the present invention is as follows: a radiotherapy device with protective function for tumor treatment, comprising a lifting platform, a first movable platform slidingly mounted on the lifting platform, a second movable platform slidably connected to the first movable platform, a hot water tank installed on the lifting platform, a first electrically driven slide rail symmetrically distributed on the second movable platform, a first electrically driven rotating shaft mounted on the electrically driven slider of the first electrically driven slide rail, a second electrically driven rotating shaft fixedly connected to the first electrically driven rotating shaft, a second electrically driven rotating shaft mounted on the electrically driven slider of the second electrically driven slide rail, a third electrically driven rotating shaft fixedly connected to the second electrically driven rotating shaft, a fixed frame rotatably connected to the electrically driven slider of the third electrically driven slide rail, a third electrically driven rotating shaft mounted on each of the symmetrically distributed fixed frames facing each other, a compression frame rotatably connected to each of the symmetrically distributed fixed frames facing each other, a compression frame rotatably connected to an adjacent third electrically driven rotating shaft, a support frame fixedly connected to the third electrically driven rotating shaft, a support frame rotatably connected to an adjacent fixed frame, and the support frame and the adjacent compression frame cooperating to clamp the adjacent edges of the body membrane.

[0007] Furthermore, rubber blocks are fixed to the opposing sides of the extrusion frame and the adjacent support frame. The rubber blocks are located on the side of the two that is away from the adjacent third electric rotating shaft. The side of the rubber block that is close to the adjacent third electric rotating shaft is provided with an inclined surface. The rubber blocks are used to hold the edge of the body membrane.

[0008] Furthermore, a pressing block is fixedly connected to the fixed frame, and a first torsion spring is fixedly connected between the fixed frame and the electric slider on the adjacent third electric slide rail. A connecting plate is fixedly connected to the third electric slide rail, and the connecting plate is fixedly connected with evenly distributed first protrusions. The pressing block causes the fixed frame to vibrate by pressing the adjacent first protrusions.

[0009] Furthermore, the maximum length of the connecting plate is less than the maximum length of the third electric slide rail, and the connecting plate is located in the middle of the adjacent third electric slide rail.

[0010] Furthermore, the connecting plate is fixed with evenly distributed second protrusions. The second protrusions cause the corresponding fixing frame to swing by pressing the adjacent pressing blocks. The maximum height of the second protrusion in the vertical direction is greater than that of the first protrusion in the vertical direction. The number of all second protrusions on the same connecting plate is less than the number of all first protrusions on the same connecting plate.

[0011] Furthermore, symmetrically distributed limiting blocks are fixed to the third electric slide rail, and the limiting blocks are used to limit the angle of adjacent fixed frames.

[0012] Furthermore, the extrusion frame is located above the adjacent support frame, and an adjustment block is fixedly connected to the support frame. The adjustment block is used to drive the adjacent extrusion frame to rotate.

[0013] Furthermore, an adjustment frame is slidably connected inside the second movable platform. The second movable platform is provided with evenly distributed first through holes. The adjustment frame is provided with the same number of second through holes as the first through holes on the second movable platform, and the positions of the second through holes on the adjustment frame correspond to the positions of the adjacent first through holes on the second movable platform. A positioning frame is fixedly connected to the upper side of the adjustment frame. The positioning frame is slidably connected to the second movable platform. The first electric slide rail is slidably connected to the second movable platform, and the symmetrically distributed first electric slide rails are fixedly connected to the adjustment frame together with a connecting frame.

[0014] Furthermore, the positioning frame has two sliding frames slidably connected to it, and an elastic membrane is fixedly connected between the two sliding frames. A tension spring is fixedly connected between the two sliding frames. A compression plate is rotatably connected to the sliding frame, and a second torsion spring is fixedly connected between the compression plate and the adjacent sliding frame.

[0015] Furthermore, a gear is rotatably connected to the positioning frame, and racks are fixed to the opposing sides of the symmetrically distributed sliding frames. The two racks are centrally symmetrical about the gear, and the racks mesh with the gear.

[0016] Furthermore, the gear spline is connected to a sliding rod, the upper side of the sliding rod is lower than the upper side of the sliding frame, a friction block is fixed to one end of the sliding rod near the positioning frame, the positioning frame is provided with a blind hole, and the friction block is located in the blind hole of the positioning frame.

[0017] Furthermore, the diameter of the blind hole on the positioning frame decreases as the distance between it and the sliding rod increases.

[0018] The beneficial effects of the present invention are as follows: 1. When the body membrane is applied to the patient, the present invention clamps the body membrane with a squeezing frame and a support frame, so that the body membrane is stably applied to the patient's skin and completes cooling and shaping. After the support of the body membrane comes into contact with the second moving stage, the support of the body membrane is pressed and fixed to ensure that the position of the body membrane does not change during the cooling process, thereby ensuring the accuracy of the body membrane after shaping.

[0019] 2. In the process of removing the body membrane from the water, the present invention uses the cooperation of the first protrusion, the second protrusion and the squeezing block to make the body membrane collect the adsorbed water at its lower part and then throw it out during the upward movement of the body membrane, thereby reducing the frequency of body membrane oscillation and ensuring the stability between the squeezing frame and the support frame and the body membrane.

[0020] 3. This invention detects the patient's position by using a positioning frame and adjusts the relative movement between the adjustment frame and the patient to make the patient's position correspond to the adjustment frame, thereby reducing the probability of misalignment between the patient's body and the body membrane and ensuring the accuracy of the body membrane's fit. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the second electric slide rail, the third electric slide rail, and the fixing frame of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the adjustment frame, positioning frame, and connecting frame of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the fixing frame, extrusion frame, and support frame of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the connecting plate, the first protrusion, and the second protrusion of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the fixing frame, pressing block, and limiting block of the present invention;

[0027] Figure 7 This is an exploded view of the extrusion frame, support frame, and rubber block of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the positioning frame, sliding frame, and extrusion plate of the present invention;

[0029] Figure 9 This is a three-dimensional structural diagram of the extrusion plate, gear, and rack of the present invention;

[0030] Figure 10 This is a three-dimensional structural diagram of the sliding rod and friction block of the present invention.

[0031] Reference numerals: 1-Lifting platform, 2-First moving platform, 3-Second moving platform, 4-Hot water tank, 5-First electric slide rail, 6-First electric rotating shaft, 7-Second electric slide rail, 8-Second electric rotating shaft, 9-Third electric slide rail, 10-Fixed frame, 11-Third electric rotating shaft, 12-Extrusion frame, 13-Support frame, 14-Rubber block, 15-Extrusion block, 16-First torsion spring, 17-Connecting plate, 18-First protrusion, 19-Second protrusion, 20-Limiting block, 21-Adjusting block, 22-Adjusting frame, 23-Positioning frame, 24-Sliding frame, 25-Tension spring, 26-Extrusion plate, 261-Second torsion spring, 27-Gear, 28-Rack, 29-Sliding rod, 30-Friction block, 31-Connecting frame. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings.

[0033] During the fixation process of existing membranes, the existing fixation devices generally use a multi-point fixation method to lock the edge of the membrane. In this process, when the fixation device locks a certain point, other unfixed areas of the membrane may still experience slight movement due to material stress release or operational disturbances, causing some areas of the membrane to deviate from the set position.

[0034] A radiotherapy device with protective functions for tumor treatment, such as Figures 1-7 As shown, the device includes a lifting platform 1, a first movable platform 2 sliding on the lifting platform 1, a second movable platform 3 slidably connected to the first movable platform 2, a hot water tank 4 installed on the lifting platform 1, a first electric slide rail 5 symmetrically distributed on the second movable platform 3, a first electric rotating shaft 6 installed on the electric slider of the first electric slide rail 5, a second electric slide rail 7 fixedly connected to the first electric rotating shaft 6, a second electric rotating shaft 8 installed on the electric slider of the second electric slide rail 7, a third electric slide rail 9 fixedly connected to the second electric rotating shaft 8, a fixed frame 10 rotatably connected to the electric slider of the third electric slide rail 9, a third electric rotating shaft 11 installed on each of the symmetrically distributed fixed frames 10 facing each other, an extrusion frame 12 rotatably connected to each of the symmetrically distributed fixed frames 10 facing each other, an extrusion frame 12 rotatably connected to an adjacent third electric rotating shaft 11, a support frame 13 fixedly connected to the third electric rotating shaft 11, and a support frame 13 rotatably connected to an adjacent fixed frame 10. The support frame 13 and the adjacent extrusion frame 12 cooperate to clamp the adjacent edges of the membrane.

[0035] Furthermore, such as Figure 5 and Figure 7 As shown, rubber blocks 14 are fixed to the opposing sides of the extrusion frame 12 and the adjacent support frame 13. The rubber blocks 14 are located on the side of the two that is away from the adjacent third electric rotating shaft 11. The side of the rubber blocks 14 that is close to the adjacent third electric rotating shaft 11 is provided with an inclined surface. The rubber blocks 14 are used to hold the edge of the body membrane.

[0036] The above solution provides a method for directly fixing the edge of the body membrane after it is attached to the patient's skin. Taking the patient's head facing backward as an example, a first movable platform 2 is slidably connected to the upper part of the lifting platform 1. The first movable platform 2 moves relative to the lifting platform 1 in the front-back direction. A second movable platform 3 is located above the first movable platform 2 and moves along the front-back direction of the first movable platform 2. The lifting platform 1, the first movable platform 2, and the second movable platform 3 are all existing devices, and their specific structures and movement methods will not be described in detail. A hot water tank 4 is located at the lower rear side of the lifting platform 1, and the upper part of the hot water tank 4 is equipped with... A flexible membrane is provided to reduce the amount of liquid droplets splashed when the membrane is removed from the hot water tank 4. The flexible membrane of the hot water tank 4 is fixedly connected to the lifting part of the lifting platform 1. The hot water tank 4 is used to heat and maintain the water temperature, so that the membrane is heated to a suitable temperature and softened after entering the water in the hot water tank 4. The second moving platform 3 has two first electric slide rails 5 symmetrically distributed on the left and right. In this section, neither of the two first electric slide rails 5 moves relative to the second moving platform 3. Initially, the electric slider of the first electric slide rail 5 is located at its front, and the second electric slide rail 7 and the third electric slide rail 9 are both in a horizontal state.

[0037] In this section, taking the position of the right-side component of the lifting platform 1 as an example, the first electric rotating shaft 6 is used to drive the second electric slide rail 7 to rotate, changing the second electric slide rail 7 from a horizontal state to a vertical state. The electric slider of the second electric slide rail 7 is equipped with a second electric rotating shaft 8, which is used to drive the third electric slide rail 9 to rotate so that the second electric slide rail 7 is in a relatively vertical state. Initially, the fixed frame 10 is located in front of the third electric slide rail 9. The third electric rotating shaft 11 is used to drive the support frame 13 to rotate, so that the support frame 13 cooperates with the adjacent extrusion frame 12 to clamp the body film. A rough surface is provided between the extrusion frame 12 and the adjacent fixed frame 10 to keep the extrusion frame 12 stable when it is not subjected to external force. Initially, the extrusion frame 12 is in contact with the left side of the adjacent fixed frame 10 to prevent the extrusion frame 12 from rotating clockwise. Figure 5 (Viewed from front to back) The rubber block 14 is used to facilitate the compression frame 12 and support frame 13 to fix the body membrane when the compression frame 12 and support frame 13 are compressing the body membrane. The inclined surface of the rubber block 14 is used to provide outward extrusion force to the body membrane, reducing the probability of relative sliding between the body membrane and the compression frame 12 and support frame 13.

[0038] When using this device, taking the movement direction of the right-side component as an example, the operator first places the membrane between the two sets of extrusion frames 12 and support frame 13. Then, the two third electric rotating shafts 11 are activated to drive the support frame 13 to rotate, so that the support frame 13 cooperates with the adjacent extrusion frame 12 to clamp the adjacent side of the membrane. After the membrane position is fixed, the operator activates the first electric slide rail 5. The electric slider of the first electric slide rail 5 drives the second electric slide rail 7 and its components to move backward through the first electric rotating shaft 6 until the second electric rotating shaft 8 moves above the hot water tank 4. Then, the first electric slide rail 5 closes, the second electric rotating shaft 8 starts and drives the third electric slide rail 9 to rotate 90° counterclockwise. Figure 2 (Looking from left to right), the third electric slide rail 9 changes from a horizontal state to a vertical state. Then, the electric slider of the third electric slide rail 9 drives the fixed frame 10 and its parts to move downward, so that the membrane enters the water in the hot water tank 4. Until the electric slider of the third electric slide rail 9 can no longer move, the membrane is completely submerged in the water, and the staff turns off the third electric slide rail 9.

[0039] When the membrane is heated in the hot water tank 4 and needs to be removed, the operator activates the third electric slide rail 9, causing the fixing frame 10 to move the membrane upwards and away from the hot water via its components. When the electric slider of the third electric slide rail 9 can no longer move upwards, the operator activates the first electric rotating shaft 6, which drives the second electric slide rail 7 to rotate 90° clockwise. Figure 2 (Viewed from left to right), the second electric slide rail 7 drives its components to rotate synchronously. The second electric slide rail 7 changes from a horizontal to a vertical position, and the third electric slide rail 9 changes from a vertical to a horizontal position. Then, the first electric slide rail 5 is activated, and its electric slider drives the second electric slide rail 7 and its components to move via the first electric rotating shaft 6, moving the body membrane to the position where it needs to be fixed on the patient's body (taking the fixation of the patient's head as an example in this article). Subsequently, the second electric slide rail 7 is activated, and its electric slider drives the third electric slide rail 9 to move downward via the second electric rotating shaft 8, causing the compression frame 12 and the support frame 13 to gradually bring the body membrane closer to and conform to the patient's body. When the support frame 13 approaches the upper side of the second moving platform 3... (At this point, most of the body membrane has initially adhered to the patient, and this area can provide upward support for the body membrane.) The third electric rotating shaft 11 drives the support frame 13 to rotate counterclockwise to release the support on the lower side of the body membrane. After the electric slider of the second electric slide rail 7 can no longer move downward, the fixing frame 10 and its parts stop moving, and the edge of the body membrane contacts the upper side of the second moving platform 3. The body membrane adheres to the patient. (The staff can use the existing clamps to reinforce the edge of the body membrane.) The squeezing frame 12 and the second moving platform 3 together fix the edge of the body membrane to ensure that the position of the body membrane does not change during the cooling and shaping process. After the body membrane cools down, the electrical components start and move back to their original position, and the squeezing frame 12 releases the fixation of the body membrane.

[0040] Furthermore, such as Figures 5-7 As shown, a pressing block 15 is fixedly connected to the fixed frame 10, and a first torsion spring 16 is fixedly connected between the fixed frame 10 and the electric slider on the adjacent third electric slide rail 9. A connecting plate 17 is fixedly connected to the third electric slide rail 9, and a uniformly distributed first protrusion 18 is fixedly connected to the connecting plate 17. The pressing block 15 causes the fixed frame 10 to vibrate by pressing the adjacent first protrusion 18.

[0041] Furthermore, such as Figure 6 As shown, the maximum length of the connecting plate 17 is less than the maximum length of the third electric slide rail 9, and the connecting plate 17 is located in the middle of the adjacent third electric slide rail 9.

[0042] Furthermore, such as Figure 5 and Figure 6 As shown, a uniformly distributed second protrusion 19 is fixed on the connecting plate 17. The second protrusion 19 causes the corresponding fixing frame 10 to swing by pressing the adjacent pressing block 15. The maximum height of the second protrusion 19 in the vertical direction is greater than the maximum height of the first protrusion 18 in the vertical direction. The number of all second protrusions 19 on the same connecting plate 17 is less than the number of all first protrusions 18 on the same connecting plate 17.

[0043] The above scheme provides a method for removing adsorbed water from the body membrane during the removal process; Figure 5Taking the positions of the components as a reference, the extrusion block 15 is located on the lower right side of the fixed frame 10. The first torsion spring 16 is used to drive the fixed frame 10 to rotate in the opposite direction and reset. The connecting plate 17 is located in the middle of the lower side of the third electric slide rail 9. The first protrusion 18 and the second protrusion 19 are both located on the right side of the connecting plate 17. The first protrusion 18 causes the fixed frame 10 to vibrate by extruding the extrusion block 15, which facilitates the upward flow of water adsorbed on the membrane under the action of gravity. The second protrusion 19 causes the fixed frame 10 to swing the membrane by extruding the extrusion block 15, which shakes off the water accumulated at the bottom of the membrane. Initially, the highest point of the first protrusion 18 is lower than the highest point of the second protrusion 19, which is used to make the fixed frame 10 vibrate as it moves past the first protrusion 18 and the second protrusion 19. Since the swing amplitude of the second protrusion 19 is greater than that of the first protrusion 18, in this paper, there are four first protrusions 18 evenly distributed between two adjacent second protrusions 19 on the same connecting plate 17. The positional relationship between the second protrusion 19 and the first protrusion 18 can be adjusted according to the actual situation. During the process of taking the body membrane out of the hot water tank 4 (at this time, the second electric rotating shaft 8 has driven the third electric slide rail 9 to rotate to the vertical direction), as the electric slider on the third electric slide rail 9 drives the fixing frame 10 and its parts to move upward, the fixing frame 10 drives the squeezing block 15 to move upward. When the squeezing block 15 passes the first protrusion 18 and the second protrusion 19, the body membrane removes the adsorbed water by a combination of vibration and swing, thereby increasing the comfort of the body membrane when it fits the patient.

[0044] Furthermore, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, symmetrically distributed limiting blocks 20 are fixed on the third electric slide rail 9, and the limiting blocks 20 limit the angle of the adjacent fixed frame 10.

[0045] Furthermore, such as Figure 7 As shown, the extrusion frame 12 is located above the adjacent support frame 13, and an adjustment block 21 is fixedly connected to the support frame 13. The adjustment block 21 is used to push the adjacent extrusion frame 12 to rotate.

[0046] In the above scheme, this paragraph uses Figure 5The reference for the positions of the components is shown from front to back. A third electric slide rail 9 has two symmetrically distributed limiting blocks 20. These two limiting blocks 20 are used to ensure that when the electric slider of the adjacent third electric slide rail 9 moves the fixing frame 10 to its front and rear ends, the two limiting blocks 20 respectively abut against the adjacent surfaces of the fixing frame 10, preventing the fixing frame 10 from rotating relative to the electric slider of the third electric slide rail 9, thus ensuring the stability of the fixing frame 10 and its components. The compression frame 12 is located above the adjacent support frame 13. The compression frame 12 consists of a horizontal part and a vertical part. An adjustment block 21 is provided on the lower right side of the support frame 13. During the process of applying the body membrane to the patient, when the support frame 13 approaches the second... After the upper side of the moving platform 3 is closed (at this point, most of the body membrane has been initially attached to the patient, and this area can provide upward support for the body membrane), the third electric rotating shaft 11 drives the support frame 13 to rotate counterclockwise to release the support on the lower side of the body membrane, making it easier for the edge of the body membrane to attach to the upper side of the second moving platform 3. As the support frame 13 drives the adjusting block 21 to rotate counterclockwise, when the adjusting block 21 contacts the vertical part of the adjacent squeezing frame 12, the adjusting block 21 pushes the squeezing frame 12 to rotate counterclockwise, causing the horizontal part of the squeezing frame 12 to tilt downward and provide a rightward pulling force to the edge of the body membrane, reducing the probability of the body membrane separating from the squeezing frame 12 when the squeezing frame 12 pushes the body membrane downward, thereby ensuring the stability of the body membrane's attachment to the patient.

[0047] Furthermore, such as Figure 2 , Figure 3 and Figures 8-10 As shown, an adjusting frame 22 is slidably connected inside the second moving platform 3. The second moving platform 3 is provided with evenly distributed first through holes. The adjusting frame 22 is provided with the same number of second through holes as the first through holes on the second moving platform 3. The positions of the second through holes on the adjusting frame 22 correspond to the positions of the adjacent first through holes on the second moving platform 3. A positioning frame 23 is fixedly connected to the upper side of the adjusting frame 22. The positioning frame 23 is slidably connected to the second moving platform 3. The first electric slide rail 5 is slidably connected to the second moving platform 3. The symmetrically distributed first electric slide rail 5 and the adjusting frame 22 are jointly fixedly connected to a connecting frame 31.

[0048] The above solution provides a method for automatically adjusting the position of the body membrane installation according to the patient's body. The first through hole on the second moving platform 3 is used to provide the initial fixation position of the body membrane, and the diameter of the first through hole on the second moving platform 3 is larger than the diameter of the second through hole on the adjusting frame 22. Initially, the axis of the second through hole on the adjusting frame 22 coincides with the axis of the adjacent first through hole on the second moving platform 3. The second through hole on the adjusting frame 22 is used to facilitate the staff to fix the formed body membrane on the adjusting frame 22 using existing devices. The positioning frame 23 is located on the upper side of the second moving platform 3, and the position of the positioning frame 23 corresponds to the position of the patient's head. The staff can adjust the position of the adjusting frame 22 and its corresponding parts through the positioning frame 23. The first electric slide rail 5 and the second A thin film is provided between the moving platforms 3 to cover the gap between the first electric slide rail 5 and the second moving platform 3. The connecting frame 31 is located at the rear of the two first electric slide rails 5 and the adjusting frame 22. It is used to drive the two first electric slide rails 5 and their parts to move synchronously when the adjusting frame 22 moves. After the patient lies on the second moving platform 3, if the patient's body is not on the center line of the second moving platform 3 and it is inconvenient to adjust, the positioning frame 23 can be moved to drive the adjusting frame 22 to move synchronously, adjust the relative position of the center line of the adjusting frame 22 with respect to the patient's body, and ensure that the fixed points on the adjusting frame 22 are evenly distributed with respect to the patient. The second through hole on the adjusting frame 22 is always in the corresponding first through hole on the second moving platform 3.

[0049] Furthermore, such as Figures 8-10 As shown, two sliding frames 24 are slidably connected to the positioning frame 23, and an elastic membrane is fixedly connected between the two sliding frames 24. A tension spring 25 is fixedly connected between the two sliding frames 24. A compression plate 26 is rotatably connected to the sliding frame 24, and a second torsion spring 261 is fixedly connected between the compression plate 26 and the adjacent sliding frame 24.

[0050] Furthermore, such as Figures 8-10 As shown, a gear 27 is rotatably connected to the positioning frame 23, and racks 28 are fixed to the opposing sides of the symmetrically distributed sliding frames 24. The two racks 28 are centrally symmetrical about the gear 27, and the racks 28 mesh with the gear 27.

[0051] Furthermore, such as Figures 8-10 As shown, the gear 27 is splinedly connected to the sliding rod 29. The upper side of the sliding rod 29 is lower than the upper side of the sliding frame 24. A friction block 30 is fixed to one end of the sliding rod 29 near the positioning frame 23. The positioning frame 23 is provided with a blind hole, and the friction block 30 is located in the blind hole of the positioning frame 23.

[0052] Furthermore, such as Figures 8-10 As shown, the diameter of the blind hole on the positioning frame 23 decreases as the distance between it and the sliding rod 29 increases.

[0053] The above solution provides a method that automatically adapts to the width of the patient's head while the patient is lying down. The positioning frame 23 has two sliding frames 24 on its upper side. Initially, the distance between the two sliding frames 24 is minimal, and the elastic membrane between them can stretch as they move, supporting the patient's head. Two tension springs 25 are symmetrically distributed between the two sliding frames 24 to increase stability when they move back to their original position. The tension springs 25 are always in a charged state. The compression plate 26 is an L-shaped plate. Initially, the angle between the upper short part of the compression plate 26 and the upper side of the sliding frame 24 is 30°. This angle can be adjusted according to actual use to facilitate the patient's head entering between the two compression plates 26. The short parts of both compression plates 26 are located on opposite sides. As the patient's head moves downwards, when the patient's head contacts the short part of the compression plate 26, the patient's head presses down... The short part of the compression plate 26 causes the entire compression plate 26 to rotate, thereby gradually clamping and fixing the patient's head with the long part of the compression plate 26 until the short part of the compression plate 26 contacts the sliding frame 24, at which point the entire compression plate 26 stops rotating. A soft pad can be provided on the inner side of the compression plate 26 to better adapt to the shape of the patient's head when the compression plate 26 fixes the patient's head. The second torsion spring 261 is used to drive the compression plate 26 to rotate in the opposite direction and reset. The gear 27 is located on the upper part of the positioning frame 23. The gear 27 and the two racks 28 are used to make the two sliding frames 24 move synchronously, so that the two sliding frames 24 are always symmetrical about the positioning frame 23, ensuring that the patient's head is located in the middle of the positioning frame 23. If the patient's head tilts to the left during the process of the patient's head entering between the two compression plates 26, the positioning frame 23 can be pushed to the left during this process, so that the positioning frame 23 drives the two sliding frames 24 to move synchronously, ensuring that the patient's head is located in the middle of the positioning frame 23.

[0054] The axis of the sliding rod 29 coincides with the axis of the gear 27. When the gear 27 rotates, it drives the sliding rod 29 to rotate synchronously via a spline. A support pad is provided on the upper part of the sliding rod 29. This support pad is used to support the patient's head. As the patient's head moves downward, the patient's head presses on the support pad to push the sliding rod 29 downward. The friction block 30 is located at the lower end of the sliding rod 29. The friction block 30 is frustoconical, and its diameter gradually decreases from top to bottom. The friction block 30 is made of elastic material. Made of materials, the depth of the blind hole on the positioning frame 23 is greater than the thickness of the friction block 30, and the minimum diameter of the blind hole on the positioning frame 23 is smaller than the minimum diameter of the friction block 30. This is used to increase the resistance of the friction block 30 to rotate within the blind hole on the positioning frame 23 by the compression deformation of the friction block 30 and the blind hole on the positioning frame 23 during the downward movement of the sliding rod 29, so that the sliding rod 29 and its parts cannot rotate, thereby locking the position of the two sliding frames 24 and increasing the stability of the patient's head during the process of adhering to the body membrane.

[0055] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A radiotherapy device with a protective function for tumor treatment, characterized in that, The utility model relates to a kind of body film fixing device, including lifting platform (1), the first mobile platform (2) is slid on the lifting platform (1), the second mobile platform (3) is slid and connected on the first mobile platform (2), hot water tank (4) is installed on the lifting platform (1), the first electric slide rail (5) of symmetrical distribution is provided on the second mobile platform (3), the first electric slide rail (5) is provided with the first electric rotating shaft (6) on the electric slider, the second electric slide rail (7) is fixedly connected to the first electric rotating shaft (6), the second electric rotating shaft (8) is provided on the electric slider of the second electric slide rail (7), the third electric slide rail (9) is fixedly connected to the second electric rotating shaft (8), fixed frame (10) is rotatably connected on the electric slider of the third electric slide rail (9), the third electric rotating shaft (11) is installed on the opposite side of the fixed frame (10) of symmetrical distribution, the opposite side of the fixed frame (10) of symmetrical distribution is rotatably connected with extrusion frame (12), the extrusion frame (12) is rotatably connected with adjacent the third electric rotating shaft (11), the third electric rotating shaft (11) is fixedly connected with support frame (13), the support frame (13) is rotatably connected with adjacent the fixed frame (10), the support frame (13) and adjacent the extrusion frame (12) are cooperated and the edge of adjacent body film is clamped together; The fixed frame (10) is fixedly connected with extrusion block (15), the first torsional spring (16) is fixedly connected between the fixed frame (10) and the electric slider on adjacent the third electric slide rail (9), the connecting plate (17) is fixedly connected with the first protruding block (18) of even distribution on the third electric slide rail (9), the fixed frame (10) is vibrated by extruding adjacent the first protruding block (18) of the extrusion block (15); The second protruding block (19) of even distribution is fixedly connected on the connecting plate (17), the corresponding fixed frame (10) is swung by extruding adjacent the extrusion block (15) of the second protruding block (19), the maximum height of the second protruding block (19) in vertical direction is greater than the maximum height of the first protruding block (18) in vertical direction, the number of all the second protruding block (19) on same the connecting plate (17) is less than the number of all the first protruding block (18) on same the connecting plate (17), the limiting block (20) of symmetrical distribution is fixedly connected on the third electric slide rail (9), the limiting block (20) is used to limit the angle of adjacent the fixed frame (10). The second mobile station (3) is slidably connected with an adjusting frame (22), the second mobile station (3) is provided with uniformly distributed first through holes, the adjusting frame (22) is provided with second through holes which are same in number with the first through holes on the second mobile station (3), the positions of the second through holes on the adjusting frame (22) correspond to the positions of adjacent first through holes on the second mobile station (3), the upper side of the adjusting frame (22) is fixedly connected with a positioning frame (23), the positioning frame (23) is slidably connected with the second mobile station (3), the first electric slide rail (5) is slidably connected with the second mobile station (3), and the symmetrically distributed first electric slide rails (5) are fixedly connected with a connecting frame (31) together with the adjusting frame (22).

2. The radiotherapy device with a protective function for tumor treatment according to claim 1, characterized in that, The extrusion frame (12) and the opposite side of the adjacent support frame (13) are fixedly connected with rubber blocks (14), the rubber blocks (14) are located on the side of the two away from the adjacent third electric rotating shaft (11), the side of the rubber blocks (14) close to the adjacent third electric rotating shaft (11) is provided with an inclined surface, and the rubber blocks (14) are used for clamping the edge of the body film.

3. The radiotherapy device with a protective function for tumor treatment according to claim 2, characterized in that, The maximum length of the connecting plate (17) is less than the maximum length of the third electric slide rail (9), and the connecting plate (17) is located at the middle part of the adjacent third electric slide rail (9).

4. The radiotherapy device with a protective function for tumor treatment according to claim 3, characterized in that, The extrusion frame (12) is located above the adjacent support frame (13), the support frame (13) is fixedly connected with an adjusting block (21), and the adjusting block (21) is used for pushing the adjacent extrusion frame (12) to rotate.

5. The radiotherapy device with a protective function for tumor treatment according to claim 4, characterized in that, The positioning frame (23) is slidably connected with two sliding frames (24), the two sliding frames (24) are fixedly connected with an elastic film together, the two sliding frames (24) are fixedly connected with a tension spring (25), the sliding frame (24) is rotatably connected with an extrusion plate (26), and the extrusion plate (26) and the adjacent sliding frame (24) are fixedly connected with a second torsion spring (261).

6. The radiotherapy device with a protective function for tumor treatment according to claim 5, characterized in that, The positioning frame (23) is rotatably connected with a gear (27), the opposite sides of the symmetrically distributed sliding frames (24) are fixedly connected with racks (28), the two racks (28) are centrally and symmetrically distributed about the gear (27), and the rack (28) is meshed with the gear (27).

7. The radiotherapy device with a protective function for tumor treatment according to claim 6, characterized in that, The gear (27) is spline-connected with a sliding rod (29), the upper side of the sliding rod (29) is lower than the upper side of the sliding frame (24), one end of the sliding rod (29) close to the positioning frame (23) is fixedly connected with a friction block (30), the positioning frame (23) is provided with a blind hole, the friction block (30) is located in the blind hole of the positioning frame (23), and the diameter of the blind hole of the positioning frame (23) decreases with the increase of the distance between the positioning frame (23) and the sliding rod (29).

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