Multi-degree-of-freedom patient posture adjusting device

Abstract

The utility model provides a multi-degree-of-freedom patient posture adjusting device, which belongs to the technical field of medical equipment and comprises a sliding seat, an arc-shaped sliding chute is arranged on the sliding seat, a sliding frame matched with the arc-shaped sliding chute is arranged in the arc-shaped sliding chute, and the sliding frame can slide along the arc-shaped sliding chute; a steering mechanism is arranged on the sliding frame, a three-dimensional movement mechanism is arranged on the steering mechanism, and a supporting and positioning unit is arranged on the three-dimensional movement mechanism. The arc-shaped sliding base is matched with the translation unit, the arc-shaped sliding axis is perpendicular to the beam axis all the time, non-coplanar irradiation in a large-angle range can be achieved, and the whole device is compact in structure, low in manufacturing cost and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to a multi-degree-of-freedom patient posture adjustment device capable of realizing coplanar irradiation and non-coplanar irradiation in a large angle range. Background Art

[0002] When positioning a patient for radiotherapy, it is necessary to align the center of the patient's irradiated target area with the isocenter of the treatment machine to ensure that the radiation beam is accurately aligned with the target area for irradiation. Conventional C-arm medical linear accelerators mostly use a treatment bed with three translational degrees of freedom (two-dimensional translation, lifting), one rotational degree of freedom and one revolution degree of freedom to complete patient positioning. This treatment bed is only suitable for patients lying flat. In order to achieve the positioning of sitting patients, a variety of vertical patient positioning devices have been proposed at home and abroad. The Chinese utility model patent application with publication number CN113288702A discloses a proton radiotherapy chair for sitting radiotherapy in a fixed beam treatment room. The patient's head tilt angle is adjusted by a tilting motion component, and the patient's head relative to the seat height is adjusted by a height adjustment component. The seat is driven to move in the vertical direction and horizontal plane by a lifting motion component and a two-dimensional translation motion component. The treatment chair mainly solves the positioning problem of the head of a sitting patient during treatment, and cannot be used for chest, abdomen or leg treatment. The Chinese utility model patent application with publication number CN114191730A discloses a patient positioning method, a patient positioning device, and a patient positioning system, which utilizes a rotation mechanism and a linear motion mechanism to drive a treatment chair to achieve the positioning of sitting patients. However, the cantilever of the device is long and occupies a large space, so whether its positioning accuracy can meet the requirements is worth considering. The utility model patent with publication number US2023 / 0172566A1 discloses a patient positioning system, which utilizes a rotating device, a lifting device, a two-dimensional translation device, and a backboard adjustment device to achieve the positioning of semi-sitting or standing patients. However, after the backboard is tilted, the angle at which the beam impinges on the patient will change with the rotation of the rotating device, and the range of non-coplanar incident angles that can be achieved will decrease with the increase of the rotation angle. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-degree-of-freedom patient posture adjustment device to solve at least one technical problem existing in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a multi-degree-of-freedom patient posture adjustment device, comprising:

[0006] A slide seat; the slide seat is provided with an arc-shaped slide groove, the arc-shaped slide groove is provided with a sliding frame matching the arc-shaped slide groove, the sliding frame can slide along the arc-shaped slide groove, and the sliding track of the sliding frame is an arc shape matching the arc-shaped slide groove;

[0007] The sliding frame is provided with a steering mechanism that can rotate, the steering mechanism is provided with a three-dimensional motion mechanism, and the three-dimensional motion mechanism is provided with a support positioning unit; wherein the steering mechanism can drive the three-dimensional motion mechanism to realize self-rotation; the three-dimensional motion mechanism can drive the support positioning unit to realize movement in three directions, and the realization of movement in three directions is: the support positioning unit realizes movement in three directions along the vertical axis, horizontal axis and longitudinal axis of the three-dimensional coordinate system in a three-dimensional coordinate system with the rotation axis of the steering mechanism as the vertical axis.

[0008] Furthermore, an arc-shaped rack is provided in the arc-shaped slide groove, a sliding actuator is provided on the sliding frame, and the sliding actuator is connected to a driving gear meshing with the arc-shaped rack.

[0009] Furthermore, the arc-shaped slide groove is provided with an arc-shaped guide rail / arc-shaped guide groove, and the sliding frame is provided with an arc-shaped guide groove / arc-shaped guide rail matching the arc-shaped guide rail / arc-shaped guide groove on the arc-shaped slide groove.

[0010] Furthermore, the three-dimensional motion mechanism includes a lifting unit and a two-dimensional motion unit connected to the lifting unit; the lifting unit can realize movement along the vertical axis, and the two-dimensional motion unit can realize movement along the horizontal axis and the longitudinal axis respectively.

[0011] Furthermore, the lifting unit is arranged on the steering mechanism, the two-dimensional motion unit is arranged on the lifting unit, and the supporting positioning unit is arranged on the two-dimensional motion unit.

[0012] Furthermore, the two-dimensional motion unit is arranged on the steering mechanism, the lifting unit is arranged on the two-dimensional motion unit, and the supporting positioning unit is arranged on the lifting unit.

[0013] Furthermore, the sliding frame is provided with a receiving groove for receiving the steering mechanism and the three-dimensional motion mechanism.

[0014] Furthermore, the rotation axis of the steering mechanism, the beam axis of the treatment head and the arc-shaped sliding axis of the sliding frame always intersect at the isocenter.

[0015] Furthermore, the lifting unit is a scissor-type lifting mechanism, a hydraulic telescopic rod mechanism or a pneumatic telescopic rod mechanism.

[0016] Furthermore, the sliding actuator is a servo motor.

[0017] The utility model has the following beneficial effects: an arc-shaped sliding base is used in conjunction with a translation unit, and the arc-shaped sliding axis is always perpendicular to the beam axis, so that non-coplanar irradiation in a large angle range can be achieved, and the entire device has a compact structure, low manufacturing cost, and small space occupation.

[0018] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the sliding cooperation structure of the sliding frame and the sliding seat of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0022] Figure 3 This is a schematic structural diagram of the three-dimensional motion mechanism of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the standing coplanar treatment state of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0024] Figure 5 This is a schematic diagram of the state of a patient after positioning of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model is completed.

[0025] Figure 6 This is a schematic diagram of a standing non-coplanar treatment state of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0026] Figure 7 This is a schematic diagram of the sitting coplanar treatment state of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0027] Figure 8 This is a structural diagram of the support positioning unit of the multi-degree-of-freedom patient posture adjustment device described in an embodiment of the utility model.

[0028] Among them: 1-slide seat; 2-arc-shaped slide groove; 3-sliding frame; 4-steering mechanism; 5-three-dimensional motion mechanism; 6-support positioning unit; 7-arc-shaped rack; 8-sliding actuator; 9-arc-shaped guide rail; 10-arc-shaped guide groove; 11-lifting unit; 12-two-dimensional motion unit; 13-accommodating slot; 14-treatment head; 15-isocenter; 16-rotation axis; 17-beam axis; 18-seat; 23-support base; 24-positioning frame; 25-human body fixation module; 26-positioning mounting hole. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0030] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present invention belongs.

[0031] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0032] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0034] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of this specification, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present technology.

[0036] Unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0037] To facilitate the understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0038] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0039] like Figures 1 to 8 As shown, in this embodiment, a multi-degree-of-freedom patient posture adjustment device is provided, and the structure of the device includes a slide 1; the slide 1 is provided with an arc-shaped slide groove 2, and a slide frame 3 matching the arc-shaped slide groove 2 is provided in the arc-shaped slide groove 2, and the slide frame 3 can slide along the arc-shaped slide groove 2, and the sliding track of the slide frame 3 is an arc matching the arc-shaped slide groove 2. The slide frame 3 is provided with a steering mechanism 4 that can rotate by itself, and the steering mechanism 4 can rotate by itself, and the steering mechanism 4 is provided with a three-dimensional motion mechanism 5, and the three-dimensional motion mechanism 5 is provided with a support positioning unit 6.

[0040] Among them, the steering mechanism 4 can drive the three-dimensional motion mechanism 5 to realize self-rotation; the three-dimensional motion mechanism 5 can drive the support positioning unit 6 to realize movement in three directions, and the realization of movement in three directions is: the support positioning unit 6 realizes movement in three directions along the vertical axis, horizontal axis and longitudinal axis of the three-dimensional coordinate system in the three-dimensional coordinate system with the rotation axis of the steering mechanism 4 as the vertical axis. Specifically, the sliding frame 3 drives the steering mechanism 4 to also make an arc-shaped movement. After the steering mechanism 4 makes an arc-shaped movement, its rotation axis tilts, but no matter which angle the rotation axis tilts to, the vertical axis of the three-dimensional coordinate system is always the rotation axis of the steering mechanism 4. Correspondingly, the horizontal axis and the vertical axis of the three-dimensional coordinate system are tilted at the same angle, the three-dimensional motion mechanism 5 tilts with the steering mechanism 4, and the support positioning unit 6 also tilts with the three-dimensional motion mechanism 5. While the three-dimensional motion mechanism 5 tilts with the steering mechanism 4, it can also realize driving the support positioning unit 6 to move along the vertical axis, the horizontal axis and the longitudinal axis.

[0041] like Figure 1 As shown, when in use, the slide 1 can be set in a slide accommodating cavity below the ground, and the treatment head 14 is installed on a wall or other fixed structure on one side, and the beam axis 17 of the treatment head 14 is in the horizontal direction. The sliding frame 3 in the arc-shaped slide groove 2 can slide in an arc along the sliding slide groove 2, and the trajectory of the arc-shaped sliding matches the arc of the arc-shaped slide groove 2. The sliding frame 3 slides back and forth in the arc-shaped slide groove 2, and the sliding trajectory is an arc. The axis around which the back and forth arc-shaped sliding is perpendicular to the plane where the rotation axis 16 and the beam axis 17 are located, and passes through the isocenter 15. The isocenter 15 is the common intersection of the rotation axis 16, the beam axis 17, and the axis around which the arc-shaped sliding is located, and no matter where the sliding frame 3 slides to, the position of this point remains unchanged.

[0042] Specifically, in order to realize the reciprocating arc-shaped sliding of the sliding frame 3 in the arc-shaped slide groove 2, arc-shaped racks 7 are provided on the side walls on both sides of the inner side of the arc-shaped slide groove 2, and sliding actuators 8 are fixedly provided on the side walls on both sides of the sliding frame 3. The sliding actuator 8 is connected to a driving gear (not shown in the figure) meshing with the arc-shaped rack 7. The sliding actuator 8 drives the driving gear to rotate. Since the driving gear meshes with the arc-shaped rack, the rotation of the driving gear drives the sliding frame 3 to move along the arc-shaped rack 7. In specific applications, the sliding actuator 8 can be a servo motor. The rotation of the servo motor is controlled by a controller to drive the sliding frame 3 to move along the arc-shaped slide groove 2 and stop at a desired position.

[0043] In a specific embodiment, in order to ensure that the sliding frame 3 can stably and reliably move back and forth in an arc shape along the arc slide groove 2, an arc guide rail 9 / arc guide groove is provided on the side wall of the arc slide groove 2, and an arc guide groove 10 / arc guide rail matching the arc guide rail 9 / arc guide groove on the arc slide groove 2 is provided on the side wall of the sliding frame 3.

[0044] Specifically, the three-dimensional motion mechanism 5 includes a lifting unit 11 and a two-dimensional motion unit 12 connected to the lifting unit 11; the lifting unit 11 can realize movement along the vertical axis, and the two-dimensional motion unit 12 can realize movement along the horizontal axis and the longitudinal axis.

[0045] In a specific embodiment, the lifting unit 11 is arranged on the steering mechanism 4, the steering mechanism 4 drives the lifting unit 11 to realize self-rotation, the two-dimensional motion unit 12 is arranged on the lifting unit 11, and the support positioning unit 6 is arranged on the two-dimensional motion unit 12. The self-rotation of the lifting unit 11 drives the two-dimensional motion unit 12 to realize self-rotation, the lifting unit 11 can also drive the two-dimensional motion unit 12 to move along the vertical axis, the two-dimensional motion unit 12 drives the support positioning unit 6 to move along the vertical axis, and at the same time, it can also drive the support positioning unit 6 to move along the horizontal axis and the longitudinal axis.

[0046] In another specific embodiment, the two-dimensional motion unit 12 is arranged on the steering mechanism 4, the steering mechanism 4 drives the two-dimensional motion unit 12 to rotate, the lifting unit 11 is arranged on the two-dimensional motion unit 12, and the support positioning unit 6 is arranged on the lifting unit 11. First, the steering mechanism 4 drives the two-dimensional motion unit 12 to rotate, the rotation of the two-dimensional motion unit drives the lifting unit 11 to rotate, and the rotation of the lifting unit 11 can drive the support positioning unit 6 to rotate, and at the same time, the two-dimensional motion unit 12 can also drive the lifting unit 11 to move along the plane where the horizontal axis and the vertical axis are located, and the lifting unit 11 can also drive the support positioning unit 6 to move along the vertical axis.

[0047] In summary, with the cooperation of the arc-shaped sliding of the sliding frame 3, the movement of the lifting unit 11 along the vertical axis, and the two-dimensional motion unit 12, the irradiation angle of the patient supported by the positioning unit 6 can be adjusted.

[0048] In a specific embodiment, the two-dimensional motion unit 12 can be a two-dimensional motion platform, which includes two mutually perpendicular linear drive mechanisms, such as, when the steering mechanism 4 is connected to the lifting unit 11, one of the linear drive mechanisms is connected to the lifting unit 11, the one linear drive mechanism can realize movement along the horizontal axis or the vertical axis, the other linear drive mechanism can realize movement along the vertical axis or the horizontal axis, the other linear drive mechanism is provided with a mounting platform, and the support positioning unit 6 is mounted on the mounting platform. Alternatively, when the two-dimensional motion unit 12 is linked to the steering mechanism 4, one of the linear drive mechanisms is installed on the steering mechanism 4, the other linear drive mechanism is connected to the lifting unit 11, and the lifting unit 11 is installed with the support positioning unit 6.

[0049] In a specific embodiment, the steering mechanism 4 can be a steering platform, for example, the steering platform includes a base (not shown in the figure) fixed on the sliding frame 3, a driving mechanism is fixed inside the base, a driving shaft of the driving mechanism can rotatably extend out of the base to connect to a support platform (not shown in the figure), the driving mechanism drives the support platform to realize self-rotation, and the self-rotation of the support platform drives the three-dimensional motion mechanism 5 to rotate.

[0050] In a specific embodiment, the sliding frame 3 is provided with a receiving groove 13 for receiving the steering mechanism 4 and the three-dimensional motion mechanism 5 .

[0051] In a specific embodiment, the structure of the support positioning unit 6 is as follows: Figure 8 As shown, it may include a support base 23, a positioning frame 24, and a human body fixing module 25, wherein the positioning frame 24 is detachably mounted on the support base 23, and the human body fixing module 25 is detachably mounted on the positioning frame 24. The positioning frame 24 is provided with a plurality of positioning mounting holes 26 for mounting the human body fixing module 25, and the height adjustment of the human body fixing module 25 can be achieved by assembling the positioning mounting holes 26 at different heights on the positioning frame 24. The human body fixing module can fix the human body on the positioning frame 24 in an adjustable height, and the human body fixing module can be a thermoplastic film, a foaming glue, a vacuum bag, etc.

[0052] Specifically, the support base 23 is connected to the three-dimensional motion mechanism 5. For example, when the lifting unit 11 is arranged on the steering mechanism 4 and the two-dimensional motion unit is arranged on the lifting unit 11, the support base 23 is arranged on the two-dimensional motion unit 12. When the two-dimensional motion unit 12 is arranged on the steering mechanism 4 and the lifting unit 11 is arranged on the two-dimensional motion unit 12, the support base 23 is arranged on the lifting unit 11. The lifting unit 11 may be a scissor-type lifting mechanism, a hydraulic telescopic rod mechanism or a pneumatic telescopic rod mechanism.

[0053] The rotating shaft of the rotating mechanism 4, the beam axis and the arc-shaped sliding axis of the sliding frame intersect at the isocenter 15. When the sliding frame is in the center position, the turntable is horizontal and the three axes are perpendicular to each other; when the sliding frame slides a certain angle away from the center, the angle between the turntable axis and the beam axis changes accordingly, while both of them always remain perpendicular to the turntable axis.

[0054] Combination Figure 1 , Figure 4 As shown, after the patient is positioned, the lifting unit and the two-dimensional motion unit are used to make the center of the patient's target area coincide with the isocenter, and then the steering mechanism 4 drives the support positioning unit 6 to rotate a certain angle, as shown in FIG. Figure 5 As shown, the coplanar incident angle of the beam relative to the patient can be adjusted to achieve coplanar angle irradiation. Figure 1 , Figure 6 As shown, after the patient is positioned, the center of the patient's target area is made to coincide with the isocenter through the lifting unit and the two-dimensional motion unit. Then the steering mechanism drives the supporting positioning unit to rotate a certain angle, and the sliding frame slides a certain angle relative to the sliding seat. By adjusting these two angles, the incident angle of the beam relative to the patient can be adjusted, thereby achieving non-coplanar angle irradiation.

[0055] like Figure 7 As shown, in another specific embodiment, a chair can be provided on the support positioning unit. Before treatment, the chair is first installed on the support base 23 of the support positioning unit, and then the patient sits on the chair, and the patient is fixed on the chair 18 using the human body fixing module 25 (such as a body mask or other fixing device). The center of the patient's target area and the isocenter are made to coincide with each other through the lifting unit and the two-dimensional motion unit, and then the steering mechanism drives the support positioning unit to rotate, and the coplanar incident angle of the beam relative to the patient can be adjusted, thereby achieving coplanar angle irradiation. It can be understood that by further adjusting the angle of the sliding frame relative to the sliding seat, non-coplanar angle irradiation can be achieved when the patient is in a sitting position.

[0056] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution disclosed in the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work should be included in the scope of protection of the utility model.

Claims

1. A multi-degree-of-freedom patient posture adjustment device, characterized in that: include: A slide seat (1); the slide seat (1) is provided with an arc-shaped slide groove (2), the arc-shaped slide groove (2) is provided with a sliding frame (3) matching the arc-shaped slide groove (2), the sliding frame (3) can slide along the arc-shaped slide groove (2), and the sliding track of the sliding frame (3) is an arc that matches the arc-shaped slide groove (2); The sliding frame (3) is provided with a steering mechanism (4) capable of self-rotation, the steering mechanism (4) is provided with a three-dimensional motion mechanism (5), and the three-dimensional motion mechanism (5) is provided with a support positioning unit (6); wherein the steering mechanism (4) can drive the three-dimensional motion mechanism (5) to realize self-rotation; the three-dimensional motion mechanism (5) can drive the support positioning unit (6) to realize movement in three directions, and the realization of movement in three directions is as follows: the support positioning unit (6) realizes movement in three directions along the vertical axis, the horizontal axis and the longitudinal axis of the three-dimensional coordinate system in a three-dimensional coordinate system with the rotation axis of the steering mechanism (4) as the vertical axis.

2. The multi-degree-of-freedom patient posture adjustment device according to claim 1, characterized in that: An arc-shaped rack (7) is arranged in the arc-shaped slide groove (2), a sliding actuator (8) is arranged on the sliding frame (3), and the sliding actuator (8) is connected to a driving gear meshing with the arc-shaped rack (7).

3. The multi-degree-of-freedom patient posture adjustment device according to claim 2, characterized in that: The arc-shaped slide groove (2) is provided with an arc-shaped guide rail (9) / arc-shaped guide groove, and the sliding frame is provided with an arc-shaped guide groove (10) / arc-shaped guide rail matching the arc-shaped guide rail (9) / arc-shaped guide groove on the arc-shaped slide groove (2).

4. The multi-degree-of-freedom patient posture adjustment device according to claim 1, characterized in that: The three-dimensional motion mechanism (5) comprises a lifting unit (11) and a two-dimensional motion unit (12) connected to the lifting unit (11); the lifting unit (11) can realize movement along the vertical axis direction, and the two-dimensional motion unit (12) can realize movement along the horizontal axis and the longitudinal axis directions.

5. The multi-degree-of-freedom patient posture adjustment device according to claim 4, characterized in that: The lifting unit (11) is arranged on the steering mechanism (4), the two-dimensional motion unit (12) is arranged on the lifting unit (11), and the supporting positioning unit (6) is arranged on the two-dimensional motion unit (12).

6. The multi-degree-of-freedom patient posture adjustment device according to claim 4, characterized in that: The two-dimensional motion unit (12) is arranged on the steering mechanism (4), the lifting unit (11) is arranged on the two-dimensional motion unit (12), and the supporting positioning unit (6) is arranged on the lifting unit (11).

7. The multi-degree-of-freedom patient posture adjustment device according to any one of claims 4 to 5, characterized in that: The sliding frame (3) is provided with a receiving groove (13) for receiving the steering mechanism (4) and the three-dimensional motion mechanism (5).

8. The multi-degree-of-freedom patient posture adjustment device according to claim 1, characterized in that: The rotation axis (16) of the steering mechanism (4), the beam axis (17) of the treatment head (14) and the arc-shaped sliding axis of the sliding frame (3) always intersect at the isocenter (15).

9. The multi-degree-of-freedom patient posture adjustment device according to claim 7, characterized in that: The lifting unit (11) is a scissor-type lifting mechanism, a hydraulic telescopic rod mechanism or a pneumatic telescopic rod mechanism.

10. The multi-degree-of-freedom patient posture adjustment device according to claim 2, characterized in that: The sliding actuator (8) is a servo motor.

Images