Radiotherapy bed convenient to adjust

Abstract

The invention discloses a radiotherapy bed convenient to adjust, which comprises a base and an adjusting table, and is characterized in that the top of the base is provided with an arc-shaped groove for placing the adjusting table; the lifting mechanism is assembled on the top of the adjusting table, a top plate is correspondingly arranged above the adjusting table, and stable rotation of the adjusting table is achieved through cooperative cooperation of the rotating mechanism and the lifting mechanism, the guiding effect of an arc-shaped groove of the base on the adjusting table and combination of gear and rack meshing transmission of a driving part; meanwhile, the top plate is driven to complete deviation rotation through hinged linkage of the hydraulic rod and the support, the two mechanisms are matched to achieve multi-angle and multi-dimensional adjustment of the top plate in the horizontal direction, a uniform negative pressure field can be formed through a negative pressure adsorption piece integrated in the top plate and holes in the top face of the top plate, and clothes of a patient are made to be tightly attached to the surface of the top plate; clothes shaking caused by breathing and body position micro movement of a patient in the radiotherapy process is relieved, and the interference effect of clothes shaking on ray accuracy is reduced.

Description

Technical Field

[0001] This invention belongs to the field of radiotherapy equipment technology, specifically relating to an easily adjustable radiotherapy bed. Background Technology

[0002] Radiotherapy is one of the core methods for treating malignant tumors. Its efficacy is directly related to the precise fixation of the patient's position and the precise alignment of the lesion and the radiation during radiotherapy. Currently, radiotherapy beds used in clinical practice generally have vertical lifting, longitudinal translation and small-angle pitch adjustment functions, which can meet the position adjustment needs of conventional radiotherapy. However, there are significant technical shortcomings in the horizontal multi-angle rotation adjustment.

[0003] The horizontal adjustment of existing radiotherapy beds is mostly limited to translation in a single direction. It cannot make multi-angle and multi-dimensional horizontal deflection adjustments according to the anatomical differences of lesions in different locations (such as tumors in the head and neck, chest and abdomen, and pelvic cavity). In actual radiotherapy operations, in order to make the rays accurately fit the lesion target area, medical staff often need to use auxiliary devices to forcibly limit the patient's body. This is not only cumbersome and time-consuming, but also easy to cause discomfort to the patient due to external pressure, and may even cause micro-positional deviations.

[0004] More importantly, existing radiotherapy beds lack flexible horizontal deflection adjustment capabilities, and can only be adapted to the patient's position by adjusting the angle of the radiation equipment. This reduces the effective utilization rate of radiation, while increasing the radiation dose to surrounding normal tissues and increasing the risk of radiotherapy side effects. Therefore, we need to provide a radiotherapy bed that is easy to adjust. Summary of the Invention

[0005] The purpose of this invention is to provide an easily adjustable radiotherapy bed. Through the coordinated operation of a rotating mechanism and a lifting mechanism, the top plate can be precisely adjusted at multiple angles in the horizontal direction. At the same time, it combines a negative pressure adsorption auxiliary fixation structure and a dustproof and protective design to solve the problems mentioned in the background art, such as the single horizontal adjustment method of the radiotherapy bed, the need for auxiliary instruments, and the easy occurrence of body position deviation, which leads to low radiation utilization and high radiation dose to normal tissues.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an easily adjustable radiotherapy bed, comprising: The base and the adjustment platform, wherein the top of the base is provided with an arc-shaped groove for placing the adjustment platform; A lifting mechanism is mounted on the top of the adjustment platform, and a top plate is correspondingly provided above the adjustment platform. The lifting mechanism is used to drive the top plate to rotate and offset. A rotating mechanism is connected between the adjusting platform and the base. The rotating mechanism is used to drive the adjusting platform to rotate and adjust along the arc groove, so that the top plate on the top of the adjusting platform moves synchronously with the adjusting platform, and cooperates with the lifting mechanism to realize multi-angle rotation adjustment of the top plate in the horizontal direction. A negative pressure adsorption component is integrated inside the top plate. The top surface of the top plate has several pores. The negative pressure adsorption component is used to form a negative pressure field at the pores on the top surface of the top plate to assist in adsorbing and fixing the patient's clothing.

[0007] Preferably, the lifting mechanism includes a rectangular groove formed on the top of the adjustment platform, a hydraulic rod rotatably installed in the rectangular groove, the top extension end of the hydraulic rod being hinged to the bottom of the top plate, a strip seat fixedly installed on the top of the adjustment platform, a bracket rotatably installed in the strip seat, and both ends of the top of the bracket being fixed to the bottom of the top plate.

[0008] Preferably, the rotating mechanism includes support columns welded to both sides of the adjusting platform, with support seats rotatably mounted on the surfaces of both support columns, and the bottom of the support seats being fixed to the top of the base by bolts. The base is provided with a drive unit for rotating the adjusting platform.

[0009] Preferably, the drive unit includes a semi-circular plate fixed to one side of the adjustment table, a rack assembly fixedly installed at the arc-shaped part of the surface of the semi-circular plate, the semi-circular plate being coaxially arranged with the support column, a driver being embedded in a circular groove on one side of the base, and a gear being installed at the output end of the driver via a coupling, the gear meshing with the rack assembly.

[0010] Preferably, a plurality of arc-shaped seats are evenly distributed along the length direction at the bottom of the arc-shaped groove, and a plurality of balls are evenly distributed in the concave part of the arc-shaped seats, with the surface of the balls abutting against the bottom of the adjusting table.

[0011] Preferably, the bottom of the adjustment platform is provided with guide grooves for the rotation of the ball bearings, and the number of guide grooves corresponds one-to-one with the number of arc-shaped seats.

[0012] Preferably, a maintenance cabinet is provided on one side of the base for easy maintenance.

[0013] Preferably, the negative pressure adsorption component includes a main chamber opened in the top plate, one end of the main chamber penetrates one side of the top plate and is connected to an external pipe, the external pipe is connected to an external negative pressure device through an air pipe, and air holes are connected to both sides of the main chamber.

[0014] Preferably, the vent section includes a plurality of sub-chambers evenly distributed along the length of the top plate, and the top of each of the sub-chambers is connected to a plurality of air inlets, the top of which penetrates the top of the top plate.

[0015] Preferably, the top profile dimension of the adjustment platform is slightly smaller than the bottom profile dimension of the top plate to form a covered layout of the top plate over the adjustment platform. An elastically deformable dust cover is fixedly installed between the top plate and the base. The dust cover has a telescopic pleated structure to adapt to the positional changes of the top plate as the adjustment platform moves.

[0016] Technical effects and advantages of the present invention: The easily adjustable radiotherapy bed proposed in this invention has the following advantages compared with the prior art: This invention achieves stable rotation of the adjustment platform by coordinating the rotation mechanism and the lifting mechanism, utilizing the guiding effect of the arc groove of the base on the adjustment platform, and combining the gear and rack meshing transmission of the drive unit; at the same time, it relies on the hinge linkage between the hydraulic rod and the bracket to drive the top plate to complete the offset rotation. The combination of the two mechanisms can realize multi-angle and multi-dimensional adjustment of the top plate in the horizontal direction. This invention utilizes a negative pressure adsorption component integrated inside the top plate to create a uniform negative pressure field through the pores on the top surface of the top plate. This allows the patient's clothing to adhere tightly to the surface of the top plate, alleviating clothing movement caused by the patient's breathing and slight body position during radiotherapy. This reduces the interference of clothing movement on the accuracy of radiation. Furthermore, the negative pressure adsorption is a non-contact physical fixation method, which will not cause pressure or damage to the patient's skin, thus improving the patient's comfort during radiotherapy.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a perspective view of the negative pressure adsorption component of the present invention; Figure 3 This is a cross-sectional view of the vent portion of the present invention; Figure 4 This is a perspective view of the dust cover of the present invention; Figure 5 This is an exploded perspective view of the drive unit of the present invention; Figure 6 This is a cross-sectional view of the base of the present invention; Figure 7 This is a perspective view of the lifting mechanism of the present invention.

[0019] In the diagram: 1. Base; 2. Adjustment platform; 3. Arc-shaped groove; 4. Lifting mechanism; 41. Rectangular groove; 42. Hydraulic rod; 43. Strip seat; 44. Bracket; 5. Top plate; 6. Rotating mechanism; 61. Support column; 62. Support seat; 63. Drive unit; 631. Semicircular plate; 632. Rack assembly; 633. Driver; 634. Gear; 7. Negative pressure adsorption component; 71. Air vent; 701. Secondary chamber; 702. Air inlet; 72. External pipe; 73. Main chamber; 8. Arc-shaped seat; 9. Ball bearing; 10. Guide groove; 11. Inspection cabinet; 12. Dust cover. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides, for example Figure 1-7 The radiotherapy bed shown includes a base 1 and an adjustment platform 2. The top of the base 1 has an arc-shaped groove 3 for placing the adjustment platform 2. The lifting mechanism 4 is mounted on the top of the adjusting platform 2, and a top plate 5 is correspondingly provided above the adjusting platform 2. The lifting mechanism 4 is used to drive the top plate 5 to rotate. The rotating mechanism 6 is connected between the adjusting platform 2 and the base 1. The rotating mechanism 6 is used to drive the adjusting platform 2 to rotate and adjust along the arc groove 3, so that the top plate 5 on the top of the adjusting platform 2 moves synchronously with the adjusting platform 2, and cooperates with the lifting mechanism 4 to realize the multi-angle rotation adjustment of the top plate 5 in the horizontal direction. Through the coordinated operation of the rotating mechanism 6 and the lifting mechanism 4, the base 1's arc groove 3 guides the adjusting platform 2, and the gear 634 of the drive unit 63 meshes with the transmission to achieve stable rotation of the adjusting platform 2; at the same time, the hydraulic rod 42 and the bracket 44 are hinged together to drive the top plate 5 to complete the offset rotation.

[0022] The negative pressure adsorption component 7 is integrated inside the top plate 5. The top surface of the top plate 5 has several pores. The negative pressure adsorption component 7 is used to form a negative pressure field at the pores on the top surface of the top plate 5 to assist in adsorbing and fixing the patient's clothing. At the same time, the negative pressure adsorption component 7 forms a uniform negative pressure field through the pores on the top surface of the top plate 5, so that the patient's clothing is tightly attached to the surface of the top plate 5, which alleviates the shaking of clothing caused by the patient's breathing and slight body position during radiotherapy, and reduces the interference of clothing shaking on the accuracy of radiation.

[0023] like Figure 7As shown, the lifting mechanism 4 includes a rectangular groove 41 opened on the top of the adjusting platform 2. A first hinge seat is fixedly embedded in the relative inner side wall of the rectangular groove 41. The bottom of the hydraulic rod 42 is rotatably installed in the first hinge seat through a pin, so as to realize the rotatable connection between the hydraulic rod 42 and the adjusting platform 2. A second hinge seat is fixedly provided at the top extension end of the hydraulic rod 42.

[0024] A hinge ear that matches the second hinge seat is fixedly provided at the bottom of the top plate 5. The hydraulic rod 42 is hinged to the bottom of the top plate 5 through the cooperation of the second hinge seat and the hinge ear. A strip seat 43 is fixedly installed on the top of the adjustment platform 2 on one side corresponding to the hydraulic rod 42. A rotating groove is opened on the top of the strip seat 43. The bottom of the bracket 44 is rotatably installed in the rotating groove through a rotating shaft.

[0025] like Figure 5 As shown, the rotating mechanism 6 includes support columns 61 integrally formed on both sides of the adjusting platform 2. Bearings are fitted on the outer circumferential surfaces of the two support columns 61. The inner side of the support base 62 is provided with mounting holes that are compatible with the bearings. The support columns 61 are rotatably installed in the support base 62 through the bearings, so as to realize the relative rotation between the support columns 61 and the support base 62.

[0026] The support base 62 has a flange at its bottom, which is fixed to the pre-set mounting surface on the top of the base 1 by fastening bolts, so that the support base 62 and the base 1 form a stable connection. The drive unit 63 is embedded in the base 1, and its power output end is connected to the adjustment table 2 for transmission, so as to provide power for the rotation of the adjustment table 2. The support column 61 and the support base 62 are connected by the rotation of the bearing to realize the flexible rotational connection between the adjustment table 2 and the base 1. With the power output of the drive unit 63, the adjustment table 2 is driven to rotate stably along the arc groove 3.

[0027] like Figure 5 As shown, the drive unit 63 includes a semi-circular plate 631 fixed to one end face of the adjustment table 2. The arc-shaped edge of the semi-circular plate 631 is integrally formed with a rack assembly 632. The arc-shaped groove 3 in the base 1 can accommodate the position of the semi-circular plate 631. The driver 633 is fixedly embedded in the circular groove by bolts. The output end of the driver 633 is fixedly connected to the gear 634 through a flexible coupling. The gear 634 and the rack assembly 632 mesh with each other to form a gear 634 rack transmission mechanism.

[0028] Specifically, the driver 633 is a precision servo motor, and both the gear 634 and the rack assembly 632 are made of high-strength wear-resistant steel. When the two work together, the rotational power output by the driver 633 is transmitted to the gear 634 through the coupling. The gear 634 drives the semi-circular plate 631 and the adjustment table 2 fixed thereto to rotate along the arc groove 3 through meshing transmission with the rack assembly 632, thereby driving the top plate 5 to rotate synchronously.

[0029] like Figure 5As shown, several arc-shaped seats 8 are evenly distributed along the length of the bottom of the arc-shaped groove 3. The arc-shaped seats 8 are fixedly connected to the bottom of the arc-shaped groove 3 by bolts. Several ball bearing 9 mounting grooves are opened on the concave surface of the arc-shaped seat 8. The ball bearing 9 is embedded in the mounting groove and partially protrudes from the surface of the mounting groove. The surface of the ball bearing 9 is in close contact with the bottom of the adjustment table 2 to form a rolling support structure.

[0030] It is worth noting that the arc-shaped seat 8 is made of wear-resistant cast iron, and the ball bearing 9 is made of high-hardness bearing steel. The combination of the two can convert the sliding friction between the adjustment table 2 and the arc-shaped groove 3 into rolling friction. The rotating mechanism 6 improves the smoothness of the rotation of the adjustment table 2, reduces the power loss of the drive unit 63, and reduces the wear between the parts.

[0031] like Figure 5 As shown, the bottom of the adjustment platform 2 is provided with a guide groove 10 for the rotation of the ball bearing 9 at the position corresponding to the arc-shaped seat 8. The number of guide grooves 10 corresponds one-to-one with the number of arc-shaped seats 8, and each guide groove 10 is properly fitted with the ball bearing 9 in the corresponding arc-shaped seat 8.

[0032] Furthermore, the concave surface of the arc-shaped seat 8 is provided with several ball bearing 9 mounting grooves. The ball bearing 9 is embedded in the mounting groove and partially protrudes from the surface of the mounting groove. The surface of the ball bearing 9 is in close contact with the bottom of the adjusting table 2 to form a rolling support structure. The cooperation between the guide groove 10 and the ball bearing 9 forms a precise guiding structure. During the rotation of the adjusting table 2, the ball bearing 9 rolls along the guide groove 10 to ensure that the top plate 5 can move precisely and synchronously with the adjusting table 2, thus ensuring the accuracy of radiotherapy positioning.

[0033] like Figure 5 As shown, a maintenance chamber with an opening facing outward is provided on one side of the base 1. The maintenance cabinet 11 is rotatably installed at the opening of the maintenance chamber via a hinge. A sealing strip is provided between the maintenance cabinet 11 and the edge of the maintenance chamber. The maintenance cabinet 11 is made of stainless steel, and the sealing strip is made of aging-resistant rubber. The rotatable connection between the maintenance cabinet 11 and the base 1 facilitates medical staff to quickly open the maintenance chamber and inspect, maintain, or replace the internal core components.

[0034] like Figure 2 As shown, the negative pressure adsorption component 7 includes a main chamber 73 opened inside the top plate 5. The main chamber 73 extends along the length of the top plate 5. One end of the main chamber 73 penetrates one side wall of the top plate 5 and forms an interface. The outer pipe 72 is sealed to the interface through a flange joint. The end of the outer pipe 72 away from the main chamber 73 is connected to the air pipe through a hose joint. The other end of the air pipe is connected to the output end of the external negative pressure device. Several air holes 71 are evenly connected to both sides of the main chamber 73 along its length. Each air hole 71 is connected to the interior of the main chamber 73.

[0035] It should be noted that both the external pipe 72 and the air pipe are made of corrosion-resistant, high-strength plastic, and the joints are equipped with seals to ensure airtightness. The negative pressure airflow is concentrated and distributed through the main chamber 73, and the air in the secondary chamber 701 and the air inlet 702 is drawn out to generate negative pressure. This, together with the external pipe 72 and the air pipe, achieves a stable connection with the external negative pressure equipment, ensuring the stable formation of the negative pressure field and improving the reliability of clothing adsorption and fixation.

[0036] like Figure 3 As shown, the vent section 71 includes several sub-chambers 701 evenly distributed along the length of the top plate 5. Each sub-chamber 701 extends along the width of the top plate 5, and its bottom is connected to the main chamber 73 through a connecting hole. Several mounting holes are evenly provided on the top of each sub-chamber 701. An air inlet 702 is fixedly embedded in the mounting hole, and its top penetrates the top of the top plate 5 and is flush with the surface of the top plate 5, forming a uniformly distributed vent structure. The negative pressure airflow from the main chamber 73 is diverted to each sub-chamber 701 through the connecting holes, and then evenly diffused to the surface of the top plate 5 through the air inlet 702, forming a uniform negative pressure field.

[0037] like Figure 4 As shown, the top outline dimension of the adjustment platform 2 is slightly smaller than the bottom outline dimension of the top plate 5, so that the top plate 5 covers the adjustment platform 2, forming a shield and protection for the adjustment platform 2 and the lifting mechanism 4; the dust cover 12 has a telescopic pleated structure, and its material is made of flexible rubber or canvas that is resistant to tension and aging. Its telescopic pleated structure can expand and contract synchronously with the rotation and offset of the top plate 5, always maintaining the closed protection of the adjustment platform 2, the lifting mechanism 4 and the rotating mechanism 6, thereby reducing the frequency of maintenance and cost.

[0038] Working principle: An arc-shaped groove 3 is opened on the top of the base 1, and the adjustment platform 2 is fitted into the groove. The support columns 61 on both sides are rotatably connected to the base 1 through the support base 62 to ensure the stability of the rotation of the adjustment platform 2. The drive unit 63 is started, and the driver 633 outputs power to drive the gear 634 to rotate. The gear 634 meshes with the rack group 632 on the surface of the semi-circular plate 631 on one side of the adjustment platform 2. Since the semi-circular plate 631 and the support column 61 are coaxially set, the rotational motion of the gear 634 is converted into the arc rotation of the adjustment platform 2 along the arc-shaped groove 3, which drives the top plate 5 to make a large-angle deflection in the horizontal direction at the same time.

[0039] During this process, the ball bearing 9 embedded in the arc-shaped seat 8 at the bottom of the arc-shaped groove 3 cooperates with the guide groove 10 at the bottom of the adjustment platform 2 to convert the sliding friction between the adjustment platform 2 and the arc-shaped groove 3 into rolling friction, reduce rotational resistance, and ensure that the adjustment platform 2 rotates smoothly without jamming.

[0040] After the adjustment platform 2 completes its initial rotation, the lifting mechanism 4 is activated to make precise fine adjustments to the horizontal angle of the top plate 5. One end of the hydraulic rod 42 on the top of the adjustment platform 2 is rotatably installed in the rectangular groove 41, and the other end is hinged to the bottom of the top plate 5. At the same time, the bracket 44 in the strip seat 43 is fixedly connected to the bottom of the top plate 5. The bracket 44 can rotate around the strip seat 43. When the hydraulic rod 42 extends or retracts, it pushes the top plate 5 to offset and rotate with the connection point between the bracket 44 and the strip seat 43 as the fulcrum, thereby realizing small-angle fine adjustments to the horizontal direction of the top plate 5.

[0041] The large-angle adjustment of the rotation mechanism 6 and the precise fine-tuning of the lifting mechanism 4 work together to ultimately achieve multi-angle and multi-dimensional adjustment of the top plate 5 in the horizontal direction, meeting the radiotherapy alignment requirements of different lesion sites.

[0042] By activating the external negative pressure device, the negative pressure airflow enters the main chamber 73 inside the top plate 5 through the external pipe 72, and then is diverted to several auxiliary chambers 701 through the main chamber 73, thereby drawing out the air in the main chamber 73. External air enters the auxiliary chambers 701 through the air inlet 702, forming a uniform negative pressure field on the surface of the top plate 5.

[0043] The negative pressure field can attract the patient's clothing, making it stick tightly to the surface of the top plate 5, reducing the impact of clothing shaking caused by the patient's breathing and slight body movements, and alleviating the interference of shaking on the accuracy of radiotherapy rays. At the same time, the non-contact adsorption method will not cause pressure damage to the patient's skin.

[0044] The horizontal rotation fine-tuning is a precise correction based on the six angle adjustments of the rotation mechanism. The core actuator is a precision motor, such as a servo motor or stepper motor, directly connected to the gear 634. Its working logic is as follows: The precision motor has a built-in encoder that can collect the rotation angle signal of its output shaft in real time and feed the signal back to the control system to form an angle closed-loop control. When a fine adjustment of horizontal rotation is required, the control system issues a target angle command. The precision motor drives the gear 634 to rotate according to the command. The gear 634 meshes with the rack group 632 of the semi-circular plate 631 on the side of the adjustment platform 2, driving the adjustment platform 2 to rotate at a small angle along the arc groove 3 of the base 1. The fine adjustment angle range is ±0.1° to ±2°.

[0045] At the fine-tuning limit position of the rotation stroke of the adjustment platform 2, corresponding to the maximum angle of the horizontal rotation fine-tuning of the top plate 5, a mechanical limit block and a photoelectric sensor are set. When the adjustment platform 2 rotates to the fine-tuning limit, the photoelectric sensor triggers a signal and feeds it back to the control system. The control system immediately issues a stop command to avoid over-adjustment and damage to the mechanism.

[0046] The bottom of the hydraulic rod 42 is rotatably installed in the rectangular groove 41 of the adjustment platform 2, and the top is hinged to the bottom of the top plate 5. At the same time, the top plate 5 is rotatably connected to the strip seat 43 of the adjustment platform 2 through the bracket 44. The connection point between the bracket 44 and the strip seat 43 is a fixed fulcrum. When the hydraulic rod 42 receives the fine adjustment command, it pushes the top plate 5 to rotate at a small angle around the fixed fulcrum by precise extension and retraction. The fine adjustment angle range is ±0.1° to ±1.5°, thereby realizing the horizontal tilt angle correction of the top plate 5.

[0047] The hydraulic rod 42 is equipped with a high-precision flow control valve and a displacement sensor. The displacement sensor collects the extension and retraction of the hydraulic rod 42 in real time. The flow control valve adjusts the inlet and outlet flow of hydraulic oil according to the control system command, so as to realize stepless control of the extension and retraction speed of the hydraulic rod 42. The fine adjustment speed is 0.05~0.5cm / s. Through displacement signal feedback and flow closed-loop control, it is ensured that the extension and retraction of the hydraulic rod 42 is precisely matched with the target fine adjustment displacement, so as to avoid excessive offset of the top plate 5.

[0048] During the fine-tuning process, the bracket 44 and the hydraulic rod 42 form a triangular support structure. The rigid support of the bracket 44 can counteract the lateral force when the hydraulic rod 42 extends and retracts, preventing the top plate 5 from shaking and ensuring the stability of the offset fine-tuning.

[0049] The horizontal rotation fine-tuning and horizontal offset fine-tuning can be controlled independently or in tandem: According to the radiotherapy positioning requirements, such as the lesion position deviation data obtained by the imaging positioning equipment, the control system first uses a precision motor to drive the adjustment table 2 to complete the horizontal rotation direction fine-tuning, correcting the horizontal rotation deviation of the top plate 5; then, it uses a hydraulic rod 42 to drive the top plate 5 to complete the horizontal offset direction fine-tuning, correcting the tilt deviation of the top plate 5; the two work together to achieve all-round precise fine-tuning of the top plate 5 in the horizontal direction, and the final positioning accuracy can reach ±0.1mm, meeting the high-precision alignment requirements of radiotherapy.

[0050] To avoid the risk of patients falling or swaying during the rotation of the top plate 5, a low-speed, stable adjustment control is used. The control system strictly limits the fine-tuning speed of the precision motor and hydraulic rod 42. The horizontal rotation fine-tuning speed is ≤0.2° / s, and the horizontal offset fine-tuning speed is ≤0.05cm / s. The slow adjustment rhythm can reduce the sense of imbalance caused by sudden changes in body position and avoid swaying from the perspective of movement speed.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radiotherapy couch that facilitates adjustment, characterized by, Include: The base and the adjusting table, the top of the base is provided with an arc-shaped slot for placing the adjusting table; Lifting mechanism, equipped in the top of the adjusting table, the top of the adjusting table is correspondingly provided with a top plate, the lifting mechanism is used for driving the top plate to offset rotation; Rotating mechanism, connected between the adjusting table and the base, the rotating mechanism is used for driving the adjusting table to rotate along the arc-shaped slot, so that the top plate on the top of the adjusting table moves synchronously with the adjusting table, and cooperates with the lifting mechanism to realize the multi-angle rotation adjustment of the top plate in the horizontal direction; Negative pressure suction accessory, integratedly arranged in the inside of the top plate, a plurality of apertures are formed in the top surface of the top plate, and the negative pressure suction accessory is used for forming a negative pressure field at the apertures of the top surface of the top plate to assist in adsorbing and fixing the clothes of the patient.

2. The easily adjustable radiotherapy couch of claim 1, wherein: The lifting mechanism includes a rectangular slot formed in the top of the adjusting table, a hydraulic rod is rotatably installed in the rectangular slot, the top of the hydraulic rod extends and is hinged to the bottom of the top plate, a strip-shaped seat is fixedly installed on the top of the adjusting table, and a support is rotatably installed in the strip-shaped seat, and the top of the support is fixed to the bottom of the top plate.

3. The easily adjustable radiotherapy couch of claim 1, wherein: The rotating mechanism includes support columns welded on both sides of the adjusting table, support seats are rotatably installed on the surfaces of the two support columns, and the support seats are fixed to the top of the base through bolts, and the base is provided with a driving part for rotating the adjusting table.

4. The easily adjustable radiotherapy couch of claim 3, wherein: The driving part includes a semicircular plate fixed on one side of the adjusting table, a rack group is fixedly installed on the surface of the semicircular plate, the semicircular plate is coaxially arranged with the support column, a driver is embedded in a circular groove on one side of the base, a gear is installed on the output end of the driver through a shaft coupling, and the gear is engaged with the rack group.

5. The easily adjustable radiotherapy couch of claim 1, wherein: The arc-shaped slot is uniformly provided with a plurality of arc-shaped seats along the length direction, a plurality of balls are uniformly distributed in the recesses of the arc-shaped seats, and the surfaces of the balls abut against the bottom of the adjusting table.

6. The easily adjustable radiotherapy couch of claim 5, wherein: The bottom of the adjusting table is provided with guide grooves for the rotation of the balls, and the number of the guide grooves corresponds to the number of the arc-shaped seats.

7. The easily adjustable radiotherapy couch of claim 1, wherein: One side of the base is provided with a maintenance cabinet for easy maintenance.

8. The easily adjustable radiotherapy couch of claim 1, wherein: The negative pressure suction accessory includes a main cavity formed in the top plate, one end of the main cavity penetrates through one side of the top plate and is communicated with an external pipe, the external pipe is communicated with an external negative pressure device through an air pipe, and air hole parts are communicated on both sides of the main cavity.

9. The easily adjustable radiotherapy couch of claim 8, wherein: The air hole part includes a plurality of sub-cavities uniformly distributed along the length direction of the top plate, a plurality of air inlet parts are communicated on the top of each of the plurality of sub-cavities, and the top of the air inlet part penetrates through the top of the top plate.

10. The easily adjustable radiotherapy couch of claim 1, wherein: The top profile size of the adjusting table is slightly smaller than the bottom profile size of the top plate, so as to form a covering layout of the top plate to the adjusting table, a dust cover capable of elastically deforming is fixedly arranged between the top plate and the base, and the dust cover is in an extension type wrinkle structure to adapt to the position change of the top plate when the adjusting table moves.

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