Medical bed and radiotherapy system

Abstract

The invention provides a medical bed and a radiotherapy system. The medical bed comprises a main frame body, a plate assembly, a pitching rotating assembly and a horizontal rotating assembly, the pitching rotating assembly and the horizontal rotating assembly are both connected between the main frame body and the plate assembly, the pitching rotating assembly drives the plate assembly to rotate in a vertical plane along a first axis, and the horizontal rotating assembly drives the plate assembly to rotate in a horizontal plane along a second axis. The second axis and the first axis satisfy a vertical condition and intersect with each other. The plate assembly rotates around the same point in the vertical plane and the horizontal plane, so that a target area needing to be treated can be adjusted better and more pertinently, mutual influence during adjustment of different dimensions is avoided, and the positioning process is simpler and more efficient. The treatment efficiency is higher, the placement position is more accurate, and the treatment effect can be better guaranteed.

Description

Technical Field

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

[0002] Radiotherapy is a local treatment method that uses radiation to treat tumors. Various types of X-ray therapy machines or accelerators can generate X-rays and other particle beams, which are focused and irradiated to abnormal tissues or diseased tissues, causing focal necrosis or functional changes to achieve the purpose of curing the disease.

[0003] The radiotherapy process usually requires the cooperation of a treatment bed. The patient lies on the treatment bed, and the radiation head of the radiation equipment is aimed at the target area (such as abnormal tissue or diseased tissue) that the patient needs to treat for radiotherapy. During radiotherapy, the precise placement of the patient's body is very important. The bed board of some treatment beds is set to be able to adjust the patient's position by pitching forward and backward, tilting left and right, etc.

[0004] After aligning the target area of ​​the patient to be treated with the transmitter in the first dimension (e.g., vertical plane), it is usually necessary to align it again in the second dimension (e.g., horizontal plane). However, after adjustment in the second dimension, the position of the target area in the first dimension usually changes again, which makes the positioning process more complicated and inefficient. Summary of the invention

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a medical bed is provided. The medical bed comprises a main frame, a plate assembly, a pitch rotation assembly and a horizontal rotation assembly, wherein the pitch rotation assembly and the horizontal rotation assembly are both connected between the main frame and the plate assembly, the pitch rotation assembly drives the plate assembly to rotate along a first axis in a vertical plane, and the horizontal rotation assembly drives the plate assembly to rotate along a second axis in a horizontal plane, and the second axis and the first axis meet a perpendicular condition and intersect each other.

[0006] The medical bed provided by the present application, the setting of the pitch rotation component and the horizontal rotation component can adjust the position of the patient in the vertical and horizontal planes, reduce the deviation of the patient's positioning during treatment, shorten the patient's positioning time, and improve the efficiency of the treatment process. In addition, the rotation of the plate component in the vertical and horizontal planes is around the same point, so that the target area to be treated can be adjusted better and more targeted, avoiding the influence of each other when adjusting in different dimensions, and the positioning process is simpler and more efficient. The treatment efficiency is higher, the placement position is more accurate, and the treatment effect can be better guaranteed.

[0007] Exemplarily, the pitch rotation assembly includes a first link group and a second link group, the first link group includes a fixed part connected to the main frame and a first rotating part connected to the plate assembly, the first rotating part is rotatably connected to the fixed part, the second link group is connected between the main frame and the plate assembly and pushes the plate assembly, and the plate assembly rotates around the first axis together with the first rotating part under the push of the second link assembly.

[0008] Exemplarily, there are at least two first connecting rod sets which are spaced apart along the first axis.

[0009] Exemplarily, the second connecting rod group includes a screw rod, a sliding member and a second rotating member. The screw rod is arranged on the main frame, the sliding member is connected to the screw rod, the first end of the second rotating member is connected to the sliding member and the second end is connected to the plate assembly. The sliding member is driven by the screw rod, which drives the first end to move and causes the second rotating member to rotate, so as to realize the pushing of the plate assembly by the second connecting rod group.

[0010] Exemplarily, a guide rail is provided on the main frame, and the sliding member is slidably connected to the guide rail.

[0011] Exemplarily, the pitch rotation assembly further includes a first driving member, which drives the lead screw to rotate via a synchronous belt.

[0012] Exemplarily, a position feedback member is further provided at the rotational connection between the fixed member and the first rotating member to feed back position information of the first rotating member.

[0013] Exemplarily, the main frame includes a base and a first mounting plate rotatable relative to the base, the horizontal rotation assembly includes a second driving member and a rotating wheel geared with the second driving member, the plate assembly and the second driving member are both connected to the first mounting plate, the rotating wheel is connected to the base, the second driving member drives the rotating wheel to drive the plate assembly and the first mounting plate to rotate together, and the rotation axis of the rotating wheel overlaps with the second axis.

[0014] According to another aspect of the present invention, a radiotherapy system is also provided, which comprises a radiation device and any one of the above-mentioned medical beds.

[0015] Exemplarily, the radiotherapy system further includes an annular frame, the radiation device is movably connected to the annular frame, a radiation space is formed inside the annular frame, and at least a part of the structure of the plate assembly is located in the radiation space.

[0016] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description. The summary of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0017] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0019] Figure 1 is a schematic structural diagram of a radiotherapy system according to an exemplary embodiment of the present invention;

[0020] Figure 2 is a front view of a medical bed according to an exemplary embodiment of the present invention;

[0021] Figure 3 is a perspective view of a partial structure of a medical bed according to an exemplary embodiment of the present invention;

[0022] Figure 4 is a perspective view of a partial structure of a medical bed according to an exemplary embodiment of the present invention;

[0023] Figure 5 A top view of a partial structure of a medical bed according to an exemplary embodiment of the present invention;

[0024] Figure 6 is a perspective view of a partial structure of a medical bed according to an exemplary embodiment of the present invention;

[0025] Figure 7 It is a three-dimensional diagram of a partial structure of a main frame according to an exemplary embodiment of the present invention.

[0026] The above drawings include the following reference numerals:

[0027] 10. Medical bed; 110. Main frame; 1110. Guide rail; 1120. First mounting plate; 1130. Base; 1140. Lifting frame; 1150. Horizontal slide rail; 120. Plate assembly; 1210. Second mounting plate; 1220. Plate body; 130. Pitch rotation assembly; 1310. First connecting rod group; 1311. Fixing member; 1312. First rotating member; 1320. Second connecting rod group; 1321. Screw rod; 1322. Sliding member; 1323. Second rotating member; 1330. First driving member; 1340. Synchronous belt; 1350. Position feedback member; 140. Horizontal rotation assembly; 1410. Second driving member; 1420. Rotating wheel; 1430. Transmission wheel; 20. Radiation equipment; 30. Annular frame. DETAILED DESCRIPTION

[0028] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only exemplarily illustrates a preferred embodiment of the present invention, and the present invention can be implemented without one or more such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described in detail.

[0029] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0030] An embodiment of the present invention provides a medical bed. The medical bed can be applied to a radiotherapy system or any other medical system. Figure 2 , Figure 3 and Figure 4 The medical bed 10 may include a main frame 110, a plate assembly 120, a pitch rotation assembly 130, and a horizontal rotation assembly 140. The pitch rotation assembly 130 and the horizontal rotation assembly 140 may be connected between the main frame 110 and the plate assembly 120. Specifically, the main frame 110 may include a first mounting plate 1120, and the pitch rotation assembly 130 and the horizontal rotation assembly 140 are connected to the main frame 110 by being mounted to the first mounting plate 1120. The plate assembly 120 may include a second mounting plate 1210 and a plate body 1220, and the plate body 1220 is used for the patient to lie down, and the pitch rotation assembly 130 and the horizontal rotation assembly 140 are connected to the plate assembly 120 by being mounted to the second mounting plate 1210. The pitch rotation assembly 130 can drive the plate assembly 120 to rotate along the first axis AA in the vertical plane, and the horizontal rotation assembly 140 can drive the plate assembly 120 to rotate along the second axis BB in the horizontal plane. The second axis BB and the first axis AA meet the perpendicular condition and intersect each other. In this way, when the plate assembly 120 rotates, it can rotate along the first axis AA in the vertical plane and can rotate along the second axis BB in the horizontal plane. In these two rotations, the rotation of the plate assembly 120 has a common rotation center, that is, the intersection of the first axis AA and the second axis BB.

[0031] When the medical bed 10 is in use, the patient lies on the plate assembly 120, and the position of the patient on the vertical plane can be adjusted to a certain extent through the pitch rotation assembly 130, thereby reducing the patient's position deviation during treatment and the position deviation caused by uneven force deformation of the plate assembly 120, shortening the time for patient positioning, and improving the patient's positioning accuracy. Similarly, the patient's position on the horizontal plane can be adjusted to a certain extent through the horizontal rotation assembly 140, thereby reducing the patient's position deviation during treatment, reducing the damage of radiation to normal tissues, shortening the patient's position, and improving the patient's positioning accuracy.

[0032] The first axis AA and the second axis BB are arranged to meet the perpendicular condition and intersect each other, so that the plate assembly 120 can rotate around the same point in two planes. In actual use, the target area that the patient needs to treat can be overlapped with the point or as close as possible, so that the adjustment can be better centered on the target area. During the adjustment process, when the plate assembly 120 rotates in the horizontal plane, the position change of the target area in the vertical plane can be smaller. Similarly, when the plate assembly 120 rotates in the vertical plane, the position change of the target area in the horizontal plane can be smaller. In other words, the influence of each other when the plate assembly 120 is adjusted in two different dimensions can be reduced.

[0033] The medical bed 10 provided in the present application, the arrangement of the pitch rotation assembly 130 and the horizontal rotation assembly 140 can adjust the position of the patient in the vertical and horizontal planes, reduce the deviation of the patient's positioning during treatment, shorten the patient's positioning time, and improve the efficiency of the treatment process. In addition, the rotation of the plate assembly 120 in the vertical and horizontal planes is around the same point, so that the target area to be treated can be adjusted better and more targeted, avoiding the influence of each other when adjusting in different dimensions, and the positioning process is simpler and more efficient. The treatment efficiency is higher, the placement position is more accurate, and the treatment effect can be better guaranteed.

[0034] For example, in conjunction with reference Figure 1 , Figure 2 and Figure 5The pitch rotation assembly 130 may include a first link group 1310 and a second link group 1320. The first link group 1310 may include a fixed member 1311 connected to the main frame 110 and a first rotating member 1312 connected to the plate assembly 120. The first rotating member 1312 may be rotatably connected to the fixed member 1311. The second link group 1320 may be connected between the main frame 110 and the plate assembly 120 and push the plate assembly 120. The plate assembly 120 may rotate around the first axis AA together with the first rotating member 1312 under the push of the second link group 1320. The fixed member 1311 may be fixedly mounted on the first mounting plate 1120. The fixed member 1311 is immovable relative to the main frame 110. The first rotating member 1312 rotates relative to the fixed member 1311, and the plate assembly 120 rotates with the first rotating member 1312. In other words, the rotation of the plate assembly 120 is achieved by the relative rotation between the fixed member 1311 and the first rotating member 1312. Specifically, the second connecting rod group 1320 pushes the plate assembly 120, and the plate assembly 120 is pushed and drives the first rotating member 1312 to rotate relative to the fixed member 1311, that is, the plate assembly 120 is rotated in the vertical plane. In this way, the structural setting of the pitch rotation assembly 130 is simpler, and the space occupied by the pitch rotation assembly 130 is reduced. Exemplarily, a bearing can be provided between the fixed member 1311 and the first rotating member 1312, and the center of the bearing can be located on the first axis AA. In an embodiment not shown, the pitch rotation assembly can realize the rotation of the plate assembly in the vertical plane through other structural members. For example, the pitch rotation assembly can include multiple electric push rod groups.

[0035] For example, refer to Figure 4 and Figure 5 , there can be at least two first connecting rod groups 1310 and they are spaced apart along the first axis AA. The specific number of the first connecting rod groups 1310 can be set according to actual conditions, and can be two as in the embodiment shown in the figure, or more. The first connecting rod groups 1310 set in this way can ensure the stability of the rotation process of the plate assembly 120. In the embodiment with the rotating wheel 1420, at least part of the structure of the rotating wheel 1420 can be located between two adjacent first connecting rod groups 1310, and the structural setting can be more compact and reasonable.

[0036] For example, in conjunction with reference Figure 4 and Figure 5, the second connecting rod group 1320 may include a screw rod 1321, a sliding member 1322 and a second rotating member 1323, the screw rod 1321 is arranged on the main frame 110, the sliding member 1322 is connected to the screw rod 1321, the first end of the second rotating member 1323 is connected to the sliding member 1322 and the second end is connected to the plate assembly 120, the screw rod 1321 drives the sliding member 1322, drives the first end to move and causes the second rotating member 1323 to rotate, so as to realize the second connecting rod group 1320 pushing the plate assembly 120. It can be understood that the screw rod 1321 drives the sliding member 1322 to move, and the sliding member 1322 drives the first end to move, at this time, the second end and the plate assembly 120 are still fixed, so the first end moves and the second end is fixed to form a movement with the second end as the rotation axis, that is, the second rotating member 1323 rotates with the second end as the rotation center. In this way, the length of the second rotating member 1323 in the vertical direction changes due to the rotation, that is, the plate assembly 120 is pushed, and the plate assembly 120 is rotated in cooperation with the first connecting rod group 1310. The second connecting rod group 1320 set in this way has a simpler structure and a more stable transmission effect. In an embodiment not shown, the second connecting rod group can be an electric push rod mechanism or an eccentric mechanism.

[0037] For example, in conjunction with reference Figure 2 and Figure 5 , a guide rail 1110 may be provided on the main frame 110, and a sliding member 1322 may be slidably connected to the guide rail 1110. The extension direction of the guide rail 1110 may satisfy a parallel condition with the extension direction of the screw rod 1321. The provision of the guide rail 1110 may make the sliding track of the sliding member 1322 more stable, thereby ensuring the stability of the rotation of the plate assembly 120. In this embodiment, the second rotating member 1323 only involves movement in this direction, that is, only one guide rail 1110 is required, the structure may be simpler, and the space occupied by the pitch rotation assembly 130 may be further reduced. Exemplarily, there may be two second rotating members 1323, respectively located on both sides of the screw rod 1321, each second rotating member 1323 may be connected to a sliding member 1322, and a guide rail 1110 may be respectively provided on both sides of the screw rod 1321.

[0038] For example, at least one of the two ends of the guide rail 1110 may be provided with a limit block and / or an electrical limit switch. In this way, when the second connecting rod assembly 1320 moves too much, the sliding member 1322 and the second rotating member 1323 may be limited to prevent them from continuing to move, thereby preventing the second connecting rod assembly 1320 from moving over the stroke, that is, preventing the plate assembly 120 from rotating too much, and protecting the safety of the patient on the plate assembly 120.

[0039] For example, in conjunction with reference Figure 2 and Figure 4The pitch rotation assembly 130 may further include a first driving member 1330, and the first driving member 1330 drives the screw rod 1321 to rotate through a synchronous belt 1340. In this way, the transmission process of the synchronous belt 1340 is simpler and has better stability. In an embodiment not shown, the first driving member and the screw rod may be transmitted through a transmission wheel assembly.

[0040] For example, in conjunction with reference Figure 4 and Figure 5 , a position feedback member 1350 may also be provided at the rotational connection between the fixed member 1311 and the first rotating member 1312 to feedback the position information of the first rotating member 1312. Specifically, the position feedback member 1350 may be a feedback encoder. The position feedback member 1350 may provide real-time feedback on information such as the movement distance and position of the first rotating member 1312, so that the plate assembly 120 can rotate with higher accuracy. Exemplarily, the medical bed 10 may also be connected to a control module, which is electrically connected to the first driving member 1330 and the position feedback member 1350, and may control the operation of the first driving member 1330 according to the information obtained by the position feedback member 1350, so as to achieve precise control of the rotation angle of the plate assembly 120.

[0041] For example, in conjunction with reference Figure 2 , Figure 4 , Figure 6 and Figure 7 The main frame 110 may include a base 1130 and a first mounting plate 1120 rotatable relative to the base 1130. The horizontal rotation assembly 140 may include a second driving member 1410 and a rotating wheel 1420 geared with the second driving member 1410. The plate assembly 120 and the second driving member 1410 may both be connected to the first mounting plate 1120. The rotating wheel 1420 is connected to the base 1130. The second driving member 1410 drives the rotating wheel 1420 to drive the plate assembly 120 and the first mounting plate 1120 to rotate together. The rotation axis of the rotating wheel 1420 overlaps with the second axis BB.

[0042] The pitch rotation assembly 130 can be arranged on the first mounting plate 1120. The working process of the horizontal rotation assembly 140 can be understood as follows: the second driving member 1410 drives the rotating wheel 1420. When the rotating wheel 1420 rotates, the plate assembly 120, the first mounting plate 1120, the second driving member 1410 and the pitch rotation assembly 130 installed on the first mounting plate 1120 act as a whole, and the whole rotates with the rotating wheel 1420, that is, the plate assembly 120 rotates along the second axis BB on the horizontal plane. Specifically, the output end of the second driving member 1410 can be directly connected to the rotating wheel 1420, and a transmission wheel 1430 can also be provided to be connected to the rotating wheel 1420. With this arrangement, the overall structure of the horizontal rotation assembly 140 is simpler and the transmission process is more precise.

[0043] Exemplarily, a feedback encoder may be provided at the rotating shaft of the rotating wheel 1420, which can provide real-time feedback of the rotation information of the rotating wheel 1420, so that the rotating wheel 1420 can rotate with higher accuracy. Exemplarily, the medical bed 10 may also be connected to a control module, which is electrically connected to the second driving member 1410 and the feedback encoder, and can control the operation of the second driving member 1410 according to the information obtained by the position feedback member 1350. Exemplarily, the rotation axis of the feedback encoder rotating with the rotating wheel 1420 overlaps with the second axis BB.

[0044] For example, in conjunction with reference Figure 2 , Figure 6 and Figure 7 The main frame 110 may also be provided with a lifting frame 1140, and the base 1130 is connected to the lifting frame 1140. The lifting frame 1140 may drive the base 1130, the plate assembly 120, the pitch rotation assembly 130 and the horizontal rotation assembly 140 to move together in the vertical direction.

[0045] For example, continue to combine with reference Figure 2 , Figure 6 and Figure 7 , a transverse slide rail 1150 may also be provided on the lifting frame 1140, and the base 1130 is slidably connected to the transverse guide rail 1110. In this way, the base 1130 drives the plate assembly 120, the pitch rotation assembly 130 and the horizontal rotation assembly 140 to move together in the horizontal direction.

[0046] According to another aspect of the present invention, a radiation therapy system is also provided. Figure 1 The radiotherapy system may include a radiation device 20 and any one of the above-mentioned medical beds 10. Since the medical bed 10 adopts the technical solution of any one of the above-mentioned embodiments, the radiotherapy system at least has the beneficial effects brought by the technical solution of the above-mentioned embodiments, which will not be described one by one here.

[0047] For example, continue to refer to Figure 1 The radiotherapy system may further include an annular frame 30, the radiation device 20 may be movably connected to the annular frame 30, the inner side of the annular frame 30 forms a radiation space, and at least part of the structure of the plate assembly 120 is located in the radiation space. Specifically, the radiation head of the radiation device 20 is mounted on the annular frame 30, and may perform forward or reverse circular motion on the annular frame 30. In this way, with the cooperation of the annular frame 30 and the radiation device 20, the rotation of the patient may be replaced by the movement of the radiation device 20, thereby reducing the difficulty of patient positioning, shortening the positioning time, and improving the accuracy and efficiency of treatment.

[0048] For example, the center of the annular frame 30 may be located on the second axis BB. In other words, a diameter of the annular frame 30 may overlap with the second axis BB. The treatment bed thus arranged may occupy a smaller space overall, be less difficult to manufacture and assemble, and have a lower product cost for the radiotherapy system.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0050] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A medical bed, characterized in that: It includes a main frame, a plate assembly, a pitch rotation assembly and a horizontal rotation assembly, wherein the pitch rotation assembly and the horizontal rotation assembly are both connected between the main frame and the plate assembly, the pitch rotation assembly drives the plate assembly to rotate along a first axis in a vertical plane, and the horizontal rotation assembly drives the plate assembly to rotate along a second axis in a horizontal plane, and the second axis and the first axis meet the perpendicular condition to each other and intersect with each other.

2. The medical bed according to claim 1, characterized in that: The pitch rotation assembly includes a first link group and a second link group, the first link group includes a fixed member connected to the main frame and a first rotating member connected to the plate assembly, the first rotating member is rotatably connected to the fixed member, The second connecting rod assembly is connected between the main frame and the plate assembly and pushes the plate assembly. The plate assembly rotates around the first axis together with the first rotating member under the push of the second connecting rod assembly.

3. The medical bed according to claim 2, characterized in that: There are at least two first connecting rod groups which are spaced apart along the first axis.

4. The medical bed according to claim 2, characterized in that: The second connecting rod group includes a screw rod, a sliding member and a second rotating member. The screw rod is arranged on the main frame, the sliding member is connected to the screw rod, the first end of the second rotating member is connected to the sliding member and the second end is connected to the plate assembly. The sliding member is driven by the screw rod, and the first end is driven to move to rotate the second rotating member, so as to realize the pushing of the plate assembly by the second connecting rod group.

5. The medical bed according to claim 4, characterized in that: The main frame is provided with a guide rail, and the sliding member is slidably connected to the guide rail.

6. The medical bed according to claim 5, characterized in that: The pitch rotation assembly also includes a first driving member, and the first driving member drives the screw to rotate through a synchronous belt.

7. The medical bed according to claim 2, characterized in that: A position feedback member is also provided at the rotation connection between the fixed member and the first rotating member to feedback the position information of the first rotating member.

8. The medical bed according to any one of claims 1 to 7, characterized in that: The main frame includes a base and a first mounting plate rotatable relative to the base, and the horizontal rotation assembly includes a second driving member and a rotating wheel geared with the second driving member. The plate assembly and the second driving member are both connected to the first mounting plate, the rotating wheel is connected to the base, the second driving member drives the rotating wheel to drive the plate assembly and the first mounting plate to rotate together, and the rotation axis of the rotating wheel overlaps with the second axis.

9. A radiotherapy system, characterized in that: The medical device comprises a radiation device and a medical bed as claimed in any one of claims 1 to 8.

10. The radiation therapy system according to claim 9, characterized in that The radiotherapy system further comprises an annular frame, the radiation device is movably connected to the annular frame, a radiation space is formed inside the annular frame, and at least a part of the structure of the plate assembly is located in the radiation space.

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