Flexible arm bracket for radiotherapy

Abstract

The invention discloses a flexible arm bracket for radiotherapy, and relates to the technical field of radiotherapy. The device specifically comprises a base, a supporting pad and a supporting assembly, the supporting pad is arranged at the top of the supporting assembly, the supporting assembly comprises a three-axis moving module, a controller and a driving mechanism, the three-axis moving module is arranged at the top of the base, the supporting pad is connected with the three-axis moving module, and the driving mechanism is in transmission connection with the three-axis moving module. The three-axis moving module is used for moving the spatial position of the supporting pad, the controller is electrically connected with the driving mechanism, and the controller controls the driving mechanism according to the body shape parameters, so that the driving mechanism drives the three-axis moving module to move the supporting pad to adjust the position of the supporting pad. The supporting assembly adjusts the position of the supporting pad according to the body shape parameters of the patient, the position of the supporting pad does not need to be manually adjusted, the adjusting speed of the position of the supporting pad is increased, an operator can more rapidly fix the arm of the patient, and therefore the efficiency of the whole radiotherapy examination is improved.

Description

Technical Field

[0001] The invention relates to the technical field of radiotherapy, and in particular provides a flexible arm bracket for radiotherapy. Background Art

[0002] The radiotherapy process requires the fixation of the patient's torso and limbs to prevent the patient's posture from changing during the radiotherapy process and causing the target area to shift. When fixing the patient's torso and limbs, the hospital will measure the patient's body parameters and develop a mold for fixing the patient based on the patient's body parameters. The mold is used to fix the patient's torso and limbs during radiotherapy. When radiotherapy is performed on certain parts of the patient, the arms cannot be restrained in front of the chest, and the patient is required to raise the arms above the head. For example, when radiotherapy is performed for breast cancer, in order to flatten the chest wall and reduce the overlap of skin wrinkles and breast tissue, the target area can be irradiated more accurately. In this case, the patient's arms are raised and supported from the bottom by an arm bracket. During radiotherapy, it is difficult for the patient's arms to remain in the same position when they are suspended in the air. When the patient's arm posture changes, the chest skin will be stretched and displaced. Therefore, the patient's arms need to be supported by an arm bracket so that the position and posture of the patient's arms can remain unchanged.

[0003] Due to the different body shapes of different patients, the postures and positions of the arms when they are fixed are also different. For example, when the patient's shoulders are wider, the width of the arm support needs to be wider. Existing arm supports usually include a support pad, a support rod and a base. The top of the support rod is connected to the support pad, and the support pad is used to support the patient's arm. The base is provided with a number of sockets for inserting the support rod, and the bottom end of the support rod is inserted into a socket to fix the position of the support rod. By inserting the support rod into different sockets, the position of the support pad can be changed so that the position of the mop pad is adapted to the position of the patient's arm. At the same time, the support rod adopts a telescopic rod so that the length of the support rod can be adjusted. The height of the support pad can be changed by adjusting the length of the support rod so that the height of the mop pad is adapted to the position of the patient's arm.

[0004] However, when adjusting the position of the existing arm bracket, the patient needs to lie on the examination bed first, and the operator adjusts the position and length of the support rod according to the position of the patient's arm after lying down, so that the patient's arm is fixed. Every time the patient is examined, the position of the arm bracket needs to be adjusted according to the patient's body shape. Adjusting the arm bracket takes a lot of time, resulting in low efficiency of radiotherapy examination. Summary of the invention

[0005] The invention provides a flexible arm bracket for radiotherapy, which is used to solve the problem of low radiotherapy efficiency caused by a long time of adjusting the arm bracket.

[0006] The technical solution of the present invention is as follows:

[0007] A flexible arm support for radiotherapy comprises a base, a support pad and a support assembly, wherein the support pad is arranged on the top of the support assembly, and the support assembly comprises a three-axis movable module, a controller and a driving mechanism, wherein the three-axis movable module is arranged on the top of the base, the support pad is connected to the three-axis movable module, and the driving mechanism is transmission-connected to the three-axis movable module, the three-axis movable module is used to move the spatial position of the support pad, and the controller is electrically connected to the driving mechanism, and the controller controls the driving mechanism according to body shape parameters so that the driving mechanism drives the three-axis module to move the support pad to adjust the position of the support pad.

[0008] In this solution, the controller can control the three-axis mobile module according to the patient's body parameters, so that the three-axis mobile module adjusts and changes the position of the support pad, and moves the position of the support pad to a position suitable for fixing the arm. The operator does not need to manually adjust the position of the support pad, and the adjustment of the support pad position can be completed quickly, reducing the time for adjusting the support pad position, thereby improving examination efficiency.

[0009] Preferably, the three-axis movable module is a module composed of cylinders, and the driving mechanism is used to supply air to the three-axis movable module.

[0010] In this solution, the cylinder can be extended by inflating the cylinder, which can achieve the effect of streamlining the structure and reducing the volume.

[0011] Preferably, the driving mechanism includes an air pump and an air intake pipe, the air pump is connected to the air intake pipe, the air intake pipe is connected to the cylinder, the air pump supplies air to each cylinder through the air intake pipe, and the air intake pipe is provided with a stop valve.

[0012] In this solution, the air pump supplies air to the cylinder through the air inlet pipe to extend the cylinder. After the cylinder is extended to a position suitable for supporting the patient's arm, the air inlet pipe is cut off by the shut-off valve, so that the cylinder is maintained at a fixed length, thereby keeping the position of the support pad unchanged and the patient's arm position stable.

[0013] The stroke accuracy of the cylinder after inflation is poor and difficult to control, resulting in inaccurate positioning of the support pad. To solve this technical problem, the cylinder includes a telescopic rod and a cylinder body, and the driving mechanism also includes a limit rope, one end of which is connected to the telescopic rod, and the limit rope is used to limit the stroke of the cylinder.

[0014] In this solution, a limit rope is set to limit the stroke of the cylinder, so that the extension of the cylinder can be controlled each time, ensuring that the extension of the cylinder each time is accurate and reliable, so that the support pad can stay in the correct position, improving the accuracy of the support pad.

[0015] Preferably, a wire tube is sleeved on the limiting rope, and the limiting rope can be slidably passed through the wire tube, one end of the wire tube is fixedly connected to the cylinder body of the cylinder, and the other end of the wire tube is fixed to the base, and an adjusting component for adjusting the limiting rope is provided on the base, and the adjusting component is used to adjust the length of the limiting rope, thereby controlling the stroke of the cylinder.

[0016] In this solution, an adjusting component is provided to control the adjusting cable, and the adjusting component is provided on the base, so that an operator can conveniently control the adjusting cable.

[0017] When the patient's arms are raised above the head, in order to facilitate the patient's arms to be in a comfortable and relaxed state, the patient's arms are usually bent inwards. When supporting the patient's arms, the arms and forearms need to be supported separately. Therefore, four support pads are usually provided to support the patient's arms respectively. When supporting the patient's arms, the position of each support pad needs to be adjusted separately, which is cumbersome to operate. To this end, the support pad includes a first support portion and a second support portion, one end of the first support portion is hinged to one end of the second support portion, the first support portion is used to support the patient's arm, and the second support portion is used to support the patient's forearm, and the three-axis movable module is connected to the first support portion.

[0018] In this solution, the second support part for supporting the forearm is hingedly connected to the first support part for supporting the arm, so that the patient's forearm and arm can be fixed in a bent state. The first support part is connected to the second support part, and when adjusting the position of the support pad, it is only necessary to adjust the position of the first support part. After the position of the first support part is adjusted, the position of the second support part will move with the movement of the first support part. Therefore, this solution is equivalent to only needing to adjust the positions of the two support pads, and only needing to set up a three-axis moving module for the two support pads, so as to achieve the effect of streamlining the structure and reducing costs.

[0019] After the patient's arm moves onto the support pad, in order to prevent the patient's arm from actively leaving the support pad during radiotherapy, the operator also needs to use a strap to fix the patient's arm to the support pad. The use of straps for fixation is prone to problems with the straps being too tight or too loose. If the straps are too tight, they will compress the patient's arms and cause discomfort to the patient's arms. If the straps are too loose, the patient's arms may move during radiotherapy. To this end, the first support part and the second support part are frame structures with a U-shaped cross-section, and the two inner sides of the U-shaped frame structure are respectively provided with compression airbags, which are used to compress the arms in the frame structure from the upper side after being inflated.

[0020] In this solution, a compression airbag is provided to compress the patient's arm, and after the compression airbag is inflated, the contact area with the patient's arm is large, which will not cause discomfort to the patient's arm. The compression airbag can continuously apply pressure to the patient's arm, so that the patient's arm can be stably fixed.

[0021] In order to improve the stability of the connection between the first support part and the second support part, one side of the first support part and the second support part are hinged, a sleeve is provided on the other side of the first support part, a flexible connecting rod is provided at a position corresponding to the sleeve of the second support part, and the end of the flexible connecting rod can be slidably inserted into the sleeve.

[0022] In this solution, both sides of the second support portion are connected to the first support portion, so that both sides of the second support portion can be supported, thereby improving the stability of the second support portion.

[0023] In order to solve the problem that the patient's forearm swinging during radiotherapy causes muscle activity and affects the radiotherapy, a positioning airbag is provided at one end of the insertion sleeve of the flexible connecting rod. After the positioning airbag is inflated, it sticks to the inner wall of the sleeve and prevents the flexible connecting rod from moving relative to the sleeve through friction.

[0024] In this solution, after the patient's arm is swung to a comfortable position, the relative position of the first support part and the second support part can be fixed by the positioning airbag at the end of the flexible connecting rod and the sleeve to prevent the second support part from swinging relative to the first support part.

[0025] Preferably, the positioning airbag and the pressing airbag are connected.

[0026] In this solution, the positioning airbag and the pressing airbag are connected, and air can be supplied to the two airbags through one air inlet pipe, thereby reducing the number of air inlet pipes that need to be set up and making the structure of the entire arm bracket more streamlined.

[0027] Beneficial effects of the present invention:

[0028] The support assembly of the present invention adjusts the position of the support pad according to the patient's body parameters, without the need for manual adjustment of the support pad position, thereby increasing the adjustment speed of the support pad position, and the operator can fix the patient's arm more quickly, thereby improving the efficiency of the entire radiotherapy examination. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A top view of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the three-axis moving module and the base of the present invention;

[0032] Figure 3 It is a front view of the first supporting part of the present invention in a compressed airbag uninflated state;

[0033] Figure 4 It is a front view of the first supporting part of the present invention in a compressed airbag inflated state;

[0034] Figure 5 A top view of the support pad of the present invention;

[0035] Figure 6 It is a partial cross-sectional view of the flexible connecting rod, sleeve and positioning airbag of the present invention;

[0036] Figure 7 It is a top view of the first cylinder of the present invention in a state of being connected with the limiting cable and the wire tube;

[0037] Figure 8 A top view of the adjustment assembly of the present invention;

[0038] Fig. 9 It is a partial cross-sectional view of the damping block, the reel and the fixing seat of the present invention.

[0039] In the above drawings, the corresponding reference numerals are as follows:

[0040] 1. Base; 2. Three-axis moving module; 3. Support pad; 4. Limiting rope; 5. Wire tube; 6. Fixed seat; 7. Reel; 8. Damping block; 9. Motor; 21. First cylinder; 22. Second cylinder; 23. Third cylinder; 24. First slide; 25. Second slide; 31. First support part; 32. Pressing airbag; 33. Second support part; 34. Flexible connecting rod; 35. Sleeve; 36. Positioning airbag. DETAILED DESCRIPTION

[0041] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through specific implementation methods of the embodiments of the present invention.

[0042] Embodiment 1:

[0043] like Figure 1As shown, the present embodiment 1 provides a flexible arm support for radiotherapy, comprising a base 1, a support pad 3 and a support assembly, wherein the support assembly is used to support the support pad 3, and the support assembly comprises a three-axis movable module 2, a controller and a driving mechanism, wherein the three-axis movable module 2 is fixed to the top of the base 1, and the top of the three-axis movable module 2 is connected to the support pad 3, the controller is electrically connected to the driving mechanism, and the controller is provided with an input end, which is used to input the patient's body parameters, and the controller controls the driving mechanism according to the patient's body parameters, so that the driving mechanism drives the three-axis movable module 2 to move, thereby achieving the goal of moving the support pad 3 according to the patient's body parameters, so that the support pad 3 can be accurately moved to a position suitable for the patient's arm each time, thereby reducing the time required to fix the patient's arm before radiotherapy and improving the radiotherapy efficiency.

[0044] It should be noted that radiotherapy requires a mold tailored to the patient, and the patient's body is fixed by the mold. Therefore, the patient's body parameters will be collected when the mold is made, so when adjusting the position of the support pad 3, the body parameters collected when the mold is made can be directly used, and there is no need to collect the patient's body parameters separately again before radiotherapy. The patient's body parameters can be stored in the patient's medical records, and when radiotherapy is needed, the body parameters can be retrieved from the patient's medical records and input into the controller.

[0045] like Figure 2 As shown, the three-axis mobile module 2 includes three cylinders and two slides, and the telescopic direction of any one of the three cylinders is perpendicular to the telescopic direction of the other two cylinders. In order to facilitate the distinction between the three cylinders and the two slides, the three cylinders are divided into a first cylinder 21, a second cylinder 22 and a third cylinder 23, and the two slides are respectively a first slide 24 and a second slide 25. The cylinder includes a cylinder body and a telescopic rod, and the cylinder body of the first cylinder 21 is fixedly connected to the base 1, and the connection method can be bonding, bolt connection, etc. The telescopic rod of the first cylinder 21 is connected to the first slide 24, and the telescopic direction of the first cylinder 21 is parallel to the top surface of the base 1, and the top surface of the base 1 is parallel to the horizontal plane. The first cylinder 21 is used to drive the first slide 24 to move back and forth along a straight line. The cylinder body of the second cylinder 22 is fixedly connected to the first slide 24, and the telescopic rod of the second cylinder 22 is connected to the second slide 25. The telescopic direction of the second cylinder 22 is parallel to the top surface of the base 1 and perpendicular to the telescopic direction of the first cylinder 21. The second cylinder 22 is used to drive the second slide 25 to move back and forth along a straight line. The cylinder body of the third cylinder 23 is fixedly connected to the second slide 25, and the telescopic rod of the third cylinder 23 is fixedly connected to the support pad 3. The telescopic direction of the third cylinder 23 is the vertical direction. The combined action of the first cylinder 21, the second cylinder 22 and the third cylinder 23 can achieve the effect of changing the spatial position of the support pad 3.

[0046] The third cylinder 23 can be a two-axis cylinder or a three-axis cylinder. It should be noted that a two-axis cylinder refers to a cylinder with two telescopic rods, and a three-axis cylinder refers to a cylinder with three telescopic rods. Using a two-axis cylinder or a three-axis cylinder can prevent the telescopic rod from rotating relative to the cylinder body.

[0047] The controller controls the three-axis moving module 2 according to the patient's body parameters, and can obtain the extension of the second cylinder 22 according to the patient's shoulder width. When the patient raises his arm, the angle of the arm relative to the bed surface of the examination bed is usually within a fixed range, such as 20°-40°, and the angle of the arm relative to the bed surface of the examination bed is usually an intermediate value of 30°. When the arm is supported by the support pad 3, the arm, the bed surface and the third cylinder 23 form a triangle, and the third cylinder 23 is always in a vertical state. The controller can obtain the extension of the first cylinder 21 and the third cylinder 23 in combination with the patient's arm length.

[0048] After the patient has undergone the first radiotherapy, the data of the cylinder extension of the three-axis movable module 2 can be recorded in the patient's medical record. During subsequent radiotherapy, the data of the cylinder extension can be directly obtained from the patient's medical record. The controller directly controls the three-axis movable module 2 to adjust the position of the support pad 3 based on this data, thereby reducing the time for adjusting the support pad.

[0049] The driving mechanism includes an air pump and an air intake pipe for conveying gas, wherein the output end of the air pump is connected to the air intake pipe, and the other end of the air intake pipe is connected to the cylinder. The three cylinders are respectively provided with air intake pipes, and air is supplied to the three cylinders through the three air intake pipes.

[0050] A flow meter and a stop valve can be provided on each air inlet pipe, and the controller is electrically connected to the flow meter, the stop valve and the air pump. After the controller obtains the patient's body parameters, it can determine the distance that each cylinder needs to be extended, thereby determining the distance that each cylinder needs to be extended. The distance that each cylinder needs to be extended is related to the gas delivery volume, and the controller can calculate the gas delivery volume of each cylinder. Therefore, when the controller controls the air pump to deliver gas to the cylinder, the gas delivery volume is determined by the flow meter, and the controller controls the stop valve according to the flow information of the flow meter. When the gas delivery volume reaches a certain value, the controller closes the stop valve, so that there is no gas exchange between the cylinder and the outside world, so that the expansion and contraction volume of the cylinder remains unchanged. When the gas delivery volume of each cylinder reaches the calculated gas delivery volume, the stop valves on each air inlet pipe are in a closed state.

[0051] It should be noted that the cylinder adopts an automatic reset cylinder. When the radiotherapy is over, the controller opens each stop valve, and the telescopic rod of each cylinder automatically retracts into the cylinder body. The use of an automatic reset cylinder facilitates the controller to calculate the gas delivery volume each time. The automatic reset cylinder is a common product on the market, and its specific structure and principle will not be repeated.

[0052] The controller can be a PLC, a single chip microcomputer, etc.

[0053] like Figure 5 As shown, the support pad 3 includes a first support portion 31 and a second support portion 33. The first support portion 31 is a U-shaped frame structure, and the second support portion 33 is also a U-shaped frame structure. One end of the side wall of the first support portion 31 is hingedly connected to one end of the side wall of the second support portion 33, so that the first support portion 31 and the second support portion 33 can rotate relative to each other.

[0054] The first support part 31 is used to support the patient's arm, and the second support part 33 is used to support the patient's forearm. The U-shaped frame structure constrains the position of the patient's arm. The opening of the U-shaped frame structure faces upward, and the patient's arm is placed from the upper side of the U-shaped frame structure. The U-shaped frame structure constrains the position of the patient's arm from the bottom and the left and right sides.

[0055] like Figure 3 and Figure 4 As shown, the two inner side walls of the U-shaped frame structure are also provided with compression airbags 32. After the patient's arm is placed in the U-shaped frame structure, the compression airbags 32 are inflated to expand. After the compression airbags 32 are inflated, they will compress the patient's arm from the upper side to fix the patient's arm. The compression airbags 32 can be connected to the air pump through an air supply pipeline, and air is supplied to the compression airbags 32 through the air pump.

[0056] The first supporting part 31 and the second supporting part 33 are both provided with a compression airbag 32 , which fixes the patient's forearm and arm to prevent the patient's arm from moving toward the opening direction of the U-shaped frame structure.

[0057] like Figure 6 As shown, the hinge position of the first support part 31 and the second support part 33 is located on the side, and a flexible connecting rod 34 is provided on the side of the first support part 31 opposite to the hinge position, and the flexible connecting rod 34 is a bendable plastic rod. A sleeve 35 is provided at the position of the second support part 33 corresponding to the flexible connecting rod 34, and one end of the flexible connecting rod 34 can be slidably inserted into the sleeve 35. The axis of the sleeve 35 is parallel to the length direction of the second support part 33. A positioning airbag 36 is provided at the end of the flexible connecting rod 34, and the positioning airbag 36 is located in the sleeve 35. When the positioning airbag 36 is inflated, the positioning airbag 36 abuts against the inner wall of the sleeve 35. The inflated positioning airbag 36 cannot move relative to the inner wall of the sleeve 35, so that the flexible connecting rod 34 cannot move relative to the sleeve 35. The flexible connecting rod 34 is fixedly connected to the sleeve 35, so that the angles of the first support part 31 and the second support part 33 remain unchanged, thereby fixing the bending range of the patient's arm and preventing the patient's forearm from swinging relative to the arm during radiotherapy and pulling the body's muscle activity.

[0058] When the support pad 3 is used, the entire arm support is placed at the head of the examination bed so that the base 1 is in contact with the bed surface. The position of the support pad 3 is moved by the three-axis moving module 2. After the patient lies on the examination bed, the patient raises his arms to enter the first support part 31 and the second support part 33. After the patient places his arms in a comfortable position, the compression airbag 32 and the positioning airbag 36 are inflated. The compression airbag 32 fixes the patient's arms in the first support part 31 and the second support part 33, while the positioning airbag 36 fixes the relative angle between the first support part 31 and the second support part 33. Then, radiotherapy is performed with the patient's torso fixed by the mold.

[0059] Both arms of the patient need to be fixed. Therefore, the arm bracket is provided with two support pads 3, and the two support pads 3 are respectively configured with two three-axis mobile modules 2. The two three-axis mobile modules 2 can be supplied with air by an air pump.

[0060] Since the fixed positions of the two arms of the patient are symmetrical to each other, the two first slides 24 can be connected to each other, or in other words, the two three-axis moving modules 2 share one first slide 24 .

[0061] The bottom of the first supporting part 31 and the second supporting part 33 can be padded with cushion materials such as sponge and sterile cloth to improve the comfort of the patient.

[0062] The flexible connecting rod 34 may be a hollow rod, one end of which is connected to the compression airbag 32, and the other end of which is connected to the positioning airbag 36. When the air pump inflates the compression airbag 32, it will also inflate the positioning airbag 36. As an optional embodiment, a connecting pipe may be provided between the flexible connecting rod 34 and the compression airbag 32, and the gas in the compression airbag 32 may enter the flexible connecting rod 34 from the connecting pipe, and then enter the positioning airbag 36 from the flexible connecting rod 34.

[0063] The support pad 3 is connected to the third cylinder 23. Since different patients have different angles when raising their arms, the corresponding support pad 3 needs to lift the patient's arm, so the angle of the support pad 3 also needs to be adjusted. Therefore, the support pad 3 and the third cylinder can be connected by a ball joint structure. Alternatively, the support pad 3 and the third cylinder can be connected by an elastic rubber pad. After the patient's arm is compressed by the compression airbag 32, the patient's arm, the support pad 3, the third cylinder 23 and the base form a triangle. According to the stability of the triangle, once the position of the three-axis moving module 2 remains unchanged, the angle of the patient's arm will no longer change.

[0064] Embodiment 2:

[0065] The second embodiment provides a flexible arm support for radiotherapy. The difference from the first embodiment is that the method of controlling the extension and contraction amount of the cylinder in the second embodiment is different. The second embodiment does not need to set a flow meter and a stop valve on the air inlet pipe of the cylinder.

[0066] like Figure 7 As shown, in the second embodiment, the driving mechanism also includes a limit rope 4 for limiting the extension and contraction amount of the cylinder and a wire tube 5 wrapped around the limit rope 4, and the limit rope 4 is slidably connected to the wire tube 5. One end of the limit rope 4 extends from the end of the wire tube 5 and is connected to the telescopic rod of the cylinder, and the end of the wire tube 5 close to the telescopic rod is connected to the cylinder body of the cylinder. The other end of the wire tube 5 is fixed to the base 1, and the other end of the limit rope 4 is connected to an adjustment component, which is used to tighten or release the limit rope 4. When the cylinder is extended, the movement of the telescopic rod will pull the limit rope 4 to move. When the limit ropes 4 at both ends of the wire tube 5 are straightened, the telescopic rod of the cylinder will be affected by the limit rope 4 and cannot move, thereby achieving the effect of limiting the extension and contraction amount of the cylinder, that is, limiting the maximum stroke of the cylinder.

[0067] Therefore, when the controller can calculate the extension amount of the cylinder according to the patient's body parameters, the length of the limit rope 4 that the adjustment component should release can be obtained according to the extension amount of the cylinder. Therefore, when radiotherapy is needed, the limit rope 4 is first released by the adjustment component, the length of the cylinder is constrained by the limit rope 4, and then the air pump is used to supply air to the cylinder. When the cylinder is extended to the maximum under the constraint of the limit rope 4, the support pad 3 reaches the position expected by the controller.

[0068] The advantage of the second embodiment is that the air pump can continuously supply air to the cylinder, so that the expansion and contraction amount of the cylinder can remain unchanged, which is used to solve the problem of poor accuracy of the expansion and contraction amount of the cylinder due to the easy compression of gas.

[0069] like Figure 8 As shown, since the two three-axis mobile modules 2 include a total of six cylinders, each cylinder needs to be equipped with a limiting rope 4. Therefore, the adjustment component includes an adjustment part and a driving part. The adjustment part includes a fixed seat 6 and six reels 7, each positioning rope is connected to a reel 7 respectively, each positioning is coiled on the circumferential surface of the reel 7, and each reel 7 is rotatably connected to the fixed seat 6. The driving part includes six motors 9, each motor 9 is connected to the fixed seat 6, the six reels 7 are arranged in a straight line, and the six motors 9 of the driving part are also arranged in a straight line. The output shafts of the six motors 9 are respectively connected to the six reels 7 in transmission connection, and the six motors 9 are respectively used to drive the six reels 7 to rotate. The six motors 9 all use servo motors 9, which is convenient for accurately controlling the rotation angle.

[0070] The reel 7 can release the limit rope 4 or reel the limit rope 4 by forward and reverse rotation. Before radiotherapy, the cylinder is shortened to the shortest state, and then the motor 9 is controlled to drive the reel head to reel the limit rope 4. When all the limit ropes 4 are reeled to a taut state, the controller controls the motor 9 according to the patient's body parameters to release the limit rope 4 from each reel 7. The length of the limit rope 4 released by each reel 7 corresponds to the elongation of the cylinder corresponding to each limit rope 4. Then the cylinder air pump can be used to inflate the cylinder to extend the cylinder to a specified length, so as to achieve the effect of quickly and accurately controlling the position of the support pad 3.

[0071] like Fig. 9 As shown, in order to prevent the cylinder from pulling the drum 7 to rotate through the limit rope 4 when the cylinder is extended, a damping block 8 can be set on one side of the drum 7, and the damping block 8 is removed when the motor 9 drives the drum 7 to rotate, so as to prevent the damping block 8 from preventing the drum 7 from rotating. After the motor 9 stops rotating, the damping block 8 is inserted between the drum 7 and the fixed seat 6, and the friction between the damping block 8 and the drum 7 prevents the drum 7 from rotating.

[0072] As an optional embodiment, the adjustment component may not be fixed to the base 1, and the adjustment component and the air pump may be fixed to the end of the examination bed or other positions, and the wire tube 5 only needs to be extended to the position of the adjustment component. For example, the end of the wire tube 5 away from the cylinder is fixed to the fixing seat 6 of the adjustment component, and the adjustment component is placed on the ground at the end of the examination bed. Similarly, the air pump is connected to the cylinder through the air inlet pipe, and is connected to the compression airbag 32 through the air supply pipe. The air inlet pipe and the air supply pipe can be extended so that the air pump can be placed at other positions.

Claims

1. A flexible arm bracket for radiotherapy, characterized in that: The invention comprises a base (1), a support pad (3) and a support assembly, wherein the support pad (3) is arranged on the top of the support assembly, and the support assembly comprises a three-axis movable module (2), a controller and a driving mechanism, wherein the three-axis movable module (2) is arranged on the top of the base (1), the support pad (3) is connected to the three-axis movable module (2), the driving mechanism is connected to the three-axis movable module (2) in a transmission manner, the three-axis movable module (2) is used to move the spatial position of the support pad (3), the controller is electrically connected to the driving mechanism, and the controller controls the driving mechanism according to body shape parameters so that the driving mechanism drives the three-axis module to move the support pad (3) to adjust the position of the support pad (3).

2. A flexible arm bracket for radiotherapy according to claim 1, characterized in that: The three-axis movable module (2) is a module composed of cylinders, and the driving mechanism is used to supply air to the three-axis movable module (2).

3. A flexible arm bracket for radiotherapy according to claim 2, characterized in that: The driving mechanism comprises an air pump and an air intake pipe, wherein the air pump is connected to the air intake pipe, and the air intake pipe is connected to the cylinder. The air pump supplies air to each cylinder through the air intake pipe, and the air intake pipe is provided with a stop valve.

4. A flexible arm bracket for radiotherapy according to claim 2, characterized in that: The cylinder comprises a telescopic rod and a cylinder body, and the driving mechanism further comprises a limiting rope (4), one end of the limiting rope (4) is connected to the telescopic rod, and the limiting rope (4) is used to limit the stroke of the cylinder.

5. A flexible arm bracket for radiotherapy according to claim 4, characterized in that: A wire tube (5) is sleeved on the limiting rope (4), and the limiting rope (4) can slidably pass through the wire tube (5). One end of the wire tube (5) is fixedly connected to the cylinder body of the cylinder, and the other end of the wire tube (5) is fixed to the base (1). An adjustment component for adjusting the limiting rope (4) is provided on the base (1), and the adjustment component is used to adjust the length of the limiting rope (4), thereby controlling the stroke of the cylinder.

6. A flexible arm bracket for radiotherapy according to claim 1, characterized in that: The support pad (3) comprises a first support portion (31) and a second support portion (33); one end of the first support portion (31) is hinged to one end of the second support portion (33); the first support portion (31) is used to support the patient's arm; the second support portion (33) is used to support the patient's forearm; and the three-axis movable module (2) is connected to the first support portion (31).

7. A flexible arm bracket for radiotherapy according to claim 6, characterized in that: The first support part (31) and the second support part (33) are frame structures with a U-shaped cross section, and two inner side surfaces of the U-shaped frame structure are respectively provided with compression airbags (32). After the compression airbags (32) are inflated, they are used to compress the arm in the frame structure from the upper side.

8. A flexible arm bracket for radiotherapy according to claim 7, characterized in that: One side of the first supporting portion (31) and the second supporting portion (33) are hinged, a sleeve (35) is provided on the other side of the first supporting portion (31), a flexible connecting rod (34) is provided at a position of the second supporting portion (33) corresponding to the sleeve (35), and an end of the flexible connecting rod (34) can be slidably inserted into the sleeve (35).

9. A flexible arm bracket for radiotherapy according to claim 8, characterized in that: One end of the flexible connecting rod (34) inserted into the sleeve (35) is provided with a positioning airbag (36). After being inflated, the positioning airbag (36) adheres to the inner wall of the sleeve (35) and prevents the flexible connecting rod (34) from moving relative to the sleeve (35) through friction.

10. A flexible arm bracket for radiotherapy according to claim 9, characterized in that: The positioning airbag (36) and the pressing airbag (32) are in communication.

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