Auxiliary supporting and positioning device for radiotherapy of head and neck tumors

Abstract

The invention relates to a head and neck tumor radiotherapy auxiliary supporting and positioning device which comprises a bed body, a movable rack, a base plate, a foaming rubber pad, a thermoplastic positioning film, a protective cover and a positioning mechanism, the movable rack is connected with the bed body in an inserted mode, the base plate is arranged on the movable rack, and the positioning mechanism is arranged at the bottom of the movable rack and comprises a lifting plate, a connecting sleeve, a supporting rod and a spring I; the supporting rod can penetrate through the hole position to support the head in advance, and the fixing assembly can lock the position of the supporting rod. The lifting plate is driven by a screw I to ascend and descend, a step rod is matched with a spring II to lock the position of the step rod, and emergency unlocking can be achieved through a traction rope between a baffle strip and the step rod. The device can realize accurate positioning of the head and the neck, improves the comfort level of a patient, is suitable for auxiliary positioning during radiotherapy of head and neck tumors, and solves the problems that an existing radiotherapy auxiliary device is complex in pre-fixing adjustment, poor in adaptability after a patient is emaciated, difficult to disassemble quickly in an emergency situation and the like.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary device technology, and relates to an auxiliary support and positioning device for radiotherapy of head and neck tumors. Background Technology

[0002] In radiotherapy for head and neck tumors, precise head positioning and stable support are crucial for ensuring the effectiveness of radiotherapy. However, existing radiotherapy support devices often have several limitations in practical applications. For example, the fixation structure of some devices is prone to loosening due to frequent adjustments or external impacts, causing the patient's head to shake during radiotherapy and affecting the precise targeting of the tumor site by the radiation. Some devices have a high degree of rigidity in their support structure, which can cause significant discomfort to patients when maintaining a fixed posture for extended periods, and may even reduce treatment compliance due to the resistance from the hard object. Furthermore, some devices are complex to operate during pre-positioning, requiring medical staff to spend considerable time adjusting the support height or fixation position, thus affecting the efficiency of radiotherapy.

[0003] Furthermore, when changes in a patient's condition (such as weight loss) cause the original support structure to no longer fit snugly, existing devices often struggle to flexibly adjust the support strength, failing to provide a consistently stable positioning effect. Moreover, in emergency situations (such as sudden patient discomfort requiring rapid removal of the fixation), the fixation structure of some devices is difficult to disassemble quickly, potentially delaying emergency treatment and increasing patient risk. Therefore, there is an urgent need for a head and neck tumor radiotherapy auxiliary support and positioning device that can achieve precise positioning, improve patient comfort, is easy to operate and adjust, and possesses emergency treatment capabilities, in order to solve the problems existing in the current technology and ensure the safety and effectiveness of the radiotherapy process. Summary of the Invention

[0004] In view of this, in order to solve the problems of complex pre-fixation adjustment, poor adaptability to patients after weight loss, and difficulty in quick disassembly in emergency situations that affect the radiotherapy effect of existing radiotherapy auxiliary devices, the present invention provides a head and neck tumor radiotherapy auxiliary support and positioning device.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A head and neck tumor radiotherapy auxiliary support and positioning device includes a bed, a movable frame is inserted into one side of the bed, a base plate is provided on the movable frame, and a foamed rubber pad is provided on the top of the base plate. The foamed rubber pad is bag-shaped and filled with foam. The patient's head is placed on the foam before it solidifies. After solidification, the foam conforms to the contour of the patient's head.

[0007] The thermoplastic positioning film is fixed to the base plate by multiple pins and works with the foam rubber pad to fix the patient's head. The top of the base plate is connected to a protective cover that limits the movement of the foam rubber pad by multiple pins.

[0008] The positioning mechanism is located at the bottom of the mobile frame and includes a lifting plate. Multiple connecting sleeves are fixed on the top of the lifting plate. A support rod is movably provided on the top of the connecting sleeve. A spring I is provided inside the connecting sleeve. The two ends of the spring I are respectively connected to the bottom of the support rod and the bottom wall of the connecting sleeve. The bottom of the mobile frame is provided with a mounting hole II that matches the support rod. The top of the base plate is provided with a through hole that matches the support rod.

[0009] Before the foam is injected into the foamed rubber pad, the support rod passes through the mounting hole II and the through hole to support the patient's head. The positioning mechanism also includes a fixing component for positioning the adjusted support rod.

[0010] As a further improvement to the above technical solution:

[0011] A pin hole I is provided on one side of the bed. A insert I is inserted into the pin hole I with an interference fit. The insert I is fixed to both sides of the moving frame. The bottom of the moving frame is provided with multiple support legs, which are used to stably support the moving frame.

[0012] A baffle strip is inserted into the outer side of the base plate. The top of the base plate has multiple mounting holes I corresponding to the slots. A pin is engaged between the mounting hole I and the insert II. The baffle strip is fixed to the base plate by the pin.

[0013] The inner side of the baffle strip is provided with two inserts II, with a gap between the two inserts II. The outer side of the base plate is provided with slots for inserting the two inserts II.

[0014] The pin includes a pin body with an opening at the bottom and a wedge block on the outer wall of the pin body that abuts against the upper insert plate II. The wedge block gradually contacts and locks against the insert plate II as the pin is inserted deeper.

[0015] The positioning mechanism also includes two guide seats fixed to the bottom of the mobile frame. One guide seat is fixed with a guide rod between itself and the mobile frame, and the other guide seat is rotatably provided with a screw I between itself and the mobile frame. The lifting plate is slidably sleeved on the outer wall of the guide rod and threaded onto the screw I. Rotating the screw I can drive the lifting plate to rise and fall smoothly along the guide rod.

[0016] The fixing component includes two positioning bars that are slidably disposed in the lifting plate. The two positioning bars are respectively located between two sets of connecting sleeves. The outer wall of the connecting sleeve is provided with a guide groove. Both sides of the positioning bar are provided with an extension protrusion corresponding to the connecting sleeve. The outer wall of the support rod is provided with a positioning groove that cooperates with the extension protrusion.

[0017] Two positioning bars are fixed to the same connecting plate at one end. A screw II is threaded through one side of the connecting plate. One end of the screw II is rotatably connected to the lifting plate. Rotating the screw II can drive the positioning bar to move so that the extension protrusion is engaged in the positioning groove.

[0018] A limiting hole is provided at the top of the lifting plate, and a nut collar is inserted into the limiting hole. The nut collar is threaded onto the screw rod I. A step rod is slidably provided through one side of the lifting plate. A spring II is fitted on the outer wall of the step rod. The two ends of the spring II abut against one side of the lifting plate and one end of the step rod, respectively. An arc-shaped groove is provided on the outer wall of the nut collar to match the large end of the step rod. The spring II can push the step rod into the arc-shaped groove to lock the position of the lifting plate.

[0019] The baffle strip and the step bar are fixedly connected by the same traction rope. The traction rope is made of nylon. Pulling the baffle strip can cause the step bar to detach from the arc groove through the traction rope.

[0020] The thermoplastic positioning film has connection holes on its surface edge for insertion with pins. After being softened by hot water at 60-70℃, the thermoplastic positioning film covers the patient's head. After cooling and hardening, it is used in conjunction with a foamed rubber pad to fix the head.

[0021] The foamed rubber pad is made of medical-grade elastic rubber, and the foam is made of medical-grade polyurethane material. The foam solidifies at room temperature for about 30 minutes to form a support structure that conforms to the contour of the patient's head.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The head and neck tumor radiotherapy auxiliary support and positioning device disclosed in this invention has a positioning mechanism that can pre-position and support the head, fixing it before the foam is added. The height of the lifting plate can be smoothly adjusted by rotating screw I, and it will not tilt under the guidance of the guide rod, ensuring the correct position of the components on the lifting plate. Rotating screw II can drive the positioning strip to move, so that the extension protrusion enters the positioning groove of the support rod, fixing the support rod and preventing it from moving up and down during the solidification of the foam, thus ensuring the accuracy of positioning. When the patient cannot fit tightly with the device due to emaciation, screw II can be rotated to drive the support rod to move upward, further supporting the head. This improves the applicability and positioning accuracy of the device, ensuring that the radiation can accurately irradiate the tumor site during radiotherapy and improve the radiotherapy effect.

[0024] 2. The head and neck tumor radiotherapy auxiliary support and positioning device disclosed in this invention connects the baffle strip and the step rod through a sturdy nylon traction rope. When it is necessary to remove the thermoplastic positioning film urgently, the baffle strip is pulled, and the step rod is moved by the traction rope, so that the large end of the step rod is disengaged from the arc groove, the lifting plate falls freely, and at the same time, the baffle strip is moved outward, so that the insert II is disengaged from the wedge block, and the pin can move upward and disengage from the base plate under slight external force. The whole process is simple to operate and can quickly release the fixation on the patient's head, avoiding injury to the patient in emergency situations.

[0025] 3. The head and neck tumor radiotherapy auxiliary support and positioning device disclosed in this invention allows the patient's head to be placed on a foamed rubber pad, which can be slightly adjusted in position. The foamed rubber flows and shapes with the contour of the head, and after solidification, it forms a support structure that fits the patient's head perfectly, preventing the patient's head from shaking due to unstable support during radiotherapy, while improving comfort. The support rod of the positioning mechanism is connected to the connecting sleeve through a spring. When the patient's head is placed on it, the support rod will compress the spring according to the pressure of the head. The spring has moderate elasticity, which can support the weight of the head without the patient feeling any obvious hard object resistance. Moreover, the support rod can be adjusted with the adjustment of the patient's head, further improving the patient's comfort experience.

[0026] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the usage process of the head and neck tumor radiotherapy auxiliary support and positioning device of the present invention;

[0029] Figure 2 This is a three-dimensional structural schematic diagram of the head and neck tumor radiotherapy auxiliary support and positioning device of the present invention;

[0030] Figure 3 This is a schematic diagram of the mobile frame structure in this invention;

[0031] Figure 4 This is a schematic diagram of the installation of the positioning mechanism at the bottom of the mobile frame 2 in this invention;

[0032] Figure 5 This is a schematic diagram of the positioning mechanism structure in this invention;

[0033] Figure 6 This is a schematic diagram of the fixed component structure in this invention;

[0034] Figure 7 This is a schematic diagram of the stepped rod and nut collar structure in this invention;

[0035] Figure 8 This is a schematic diagram of the base plate and baffle strip structure in this invention;

[0036] Figure 9 for Figure 8 Enlarged structural diagram of section A in the middle;

[0037] Figure 10 This is a schematic diagram of the bed structure in this invention.

[0038] Reference numerals: 1. Bed; 2. Moving frame; 3. Base plate; 4. Foamed rubber pad; 5. Thermoplastic positioning film; 6. Traction rope; 7. Protective cover; 8. Mounting hole II; 9. Positioning mechanism; 10. Pin; 11. Pin hole I; 21. Insert I; 22. Support leg; 31. Through hole; 32. Baffle strip; 33. Insert II; 34. Gap; 35. Slot; 36. Mounting hole I; 51. Connecting hole; 91. Lifting plate; 92. Guide seat; 921, guide rod; 93, connecting sleeve; 931, guide groove; 932, spring I; 94, support rod; 941, positioning groove; 95, screw I; 96, positioning strip; 961, extension protrusion; 97, screw II; 98, connecting plate; 99, nut collar; 910, limiting hole; 911, step rod; 912, arc groove; 913, spring II; 100, pin; 101, opening; 102, wedge. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] like Figure 1 , 2 The head and neck tumor radiotherapy support and positioning device shown includes a bed 1 and a mobile gantry 2, such as Figure 10 The bed 1 shown has a pin hole I11 on one side, and a insert I21 is interference-fitted into the pin hole I11. The insert I21 is fixed to both sides of the movable frame 2. The insert I21 is made of alloy material with a smooth surface treatment, which reduces friction with the inner wall of the pin hole I11 during insertion and removal. This facilitates the adjustment of the position of the movable frame 2 relative to the bed 1 and avoids excessive wear after long-term use. The bottom of the movable frame 2 is provided with multiple support legs 22.

[0041] like Figure 3 , 8 The mobile frame 2 shown is equipped with a base plate 3. A baffle strip 32 is inserted into the outer side of the base plate 3. Two inserts II 33 are provided on the inner side of the baffle strip 32, with a gap 34 between the two inserts II 33. The outer side of the base plate 3 has a slot 35 that matches the two inserts II 33. When installing the baffle strip 32, first align the inserts II 33 with the slots 35, and then slowly push the inserts II 33 into the inner wall of the slots 35.

[0042] like Figure 9 The base plate 3 shown has multiple mounting holes I 36 corresponding to slots 35 on its top. A pin 10 is engaged between the mounting holes I 36 and the insert II 33. The pin 10 includes a pin body 100 with an opening 101 at its bottom. A wedge 102, which abuts against the insert II 33, is provided on the outer wall of the pin body 100. When the pin 10 is inserted into the mounting hole I 36, the wedge 102 gradually contacts the insert II 33 as the insertion depth increases. The opening 101 allows the pin body 100 a certain amount of room to contract, enabling the wedge 102 to firmly press against the insert II 33, thus firmly fixing the baffle strip 32 to the base plate 3. Even if subjected to external impact, the baffle strip 32 will not loosen.

[0043] The base plate 3 has a foamed rubber pad 4 on top. The foamed rubber pad 4 is bag-shaped and made of medical-grade elastic rubber material. This material is soft and has good sealing properties, preventing leakage of the internal foam. During use, a suitable amount of uncured foam is first injected into the foamed rubber pad 4. The foam is a polyurethane material specifically used in the medical field, characterized by its non-toxic and non-irritating properties. The patient's head is then gently placed on the foamed rubber pad 4. The patient can slightly adjust their head position according to their comfort. The foam will slowly flow and shape along the contours of the head. After curing at room temperature for about 30 minutes, it forms a support structure that completely conforms to the patient's head, preventing the head from wobbling during radiotherapy due to unstable support.

[0044] The top of the base plate 3 is also fixedly connected to a protective cover 7 by multiple pins 10. The protective cover 7 is made of lightweight plastic and surrounds the outside of the foam rubber pad 4, with its height slightly higher than the foam rubber pad 4. When the patient's head is placed on the foam rubber pad 4, the protective cover 7 can block the foam rubber pad 4 from the side, preventing the patient from accidentally touching the foam rubber pad 4 and causing it to shift when adjusting their posture, thus ensuring that the foam rubber pad 4 is always in the correct position.

[0045] The thermoplastic positioning film 5 is fixed to the base plate 3 by multiple pins 10. The surface edge of the thermoplastic positioning film 5 has connection holes 51 for inserting the pins 10. Before use, soak the thermoplastic positioning film 5 in hot water at 60-70℃ for a short time to soften and make it more flexible. Then, gently place it over the patient's head and the foam rubber pad 4, and gently press the thermoplastic positioning film 5 to conform to the contour of the head. Then, pass the pins 10 through the connection holes 51 to fix it to the base plate 3. After about 5 minutes, the thermoplastic positioning film 5 will cool and harden, working in conjunction with the foam rubber pad 4 to fix the patient's head from multiple directions. Even if the patient wants to slightly turn their head during radiotherapy, it will be firmly fixed.

[0046] like Figure 4 The bottom of the mobile frame 2 shown is equipped with, for example, Figure 5The positioning mechanism 9 shown can pre-position and support the head, allowing it to be fixed before the expanding foam is added. The positioning mechanism 9 includes a lifting plate 91. Two guide seats 92 are fixedly mounted on the bottom of the movable frame 2. A guide rod 921 is fixed between one guide seat 92 and the movable frame 2, and a screw Ⅰ 95 is rotatably mounted between the other guide seat 92 and the movable frame 2. The lifting plate 91 is slidably sleeved on the outer wall of the guide rod 921, and simultaneously threaded onto the screw Ⅰ 95. When the height of the lifting plate 91 needs to be adjusted, the screw Ⅰ 95 is rotated. Guided by the guide rod 921, the lifting plate 91 moves smoothly up and down along the direction of the guide rod 921 without tilting, ensuring that the components on the lifting plate 91 always maintain the correct position.

[0047] like Figure 7 The lifting plate 91 shown has a limiting hole 910 at its top, and a nut collar 99 is inserted into the limiting hole 910. The nut collar 99 is threaded onto the screw rod I 95. A step rod 911 is slidably provided through one side of the lifting plate 91. A spring II 913 is sleeved on the outer wall of the step rod 911. The two ends of the spring II 913 abut against one side of the lifting plate 91 and one end of the step rod 911, respectively. An arc-shaped groove 912 is provided on the outer wall of the nut collar 99 to cooperate with the large end of the step rod 911. The spring II 913 pushes the large end of the step rod 911 into the arc groove 912, locking the nut collar 99 like a latch. This prevents the screw I 95 from rotating accidentally during use and causing the lifting plate 91 to shift, ensuring that the lifting plate 91 can be stably maintained at the set height. When it is necessary to lower the lifting plate 91 in an emergency, simply pull the step rod 911 outward to compress the spring II 913, causing the large end of the step rod 911 to disengage from the arc groove 912. At this time, the nut collar 99 can disengage from the lifting plate 91, and the lifting plate 91 can descend rapidly under its own weight.

[0048] like Figure 5The lifting plate 91 shown has multiple connecting sleeves 93 fixedly mounted on its top. A support rod 94 is movably mounted on the top of each connecting sleeve 93. A spring I 932 is installed inside each connecting sleeve 93. Both ends of the spring I 932 are fixedly connected to the bottom of the support rod 94 and the bottom wall of the connecting sleeve 93, respectively. The bottom of the movable frame 2 has mounting holes II 8 that fit the support rod 94. The top of the base plate 3 has through holes 31 that fit the support rod 94. Holes that fit the support rod 94 are also formed in the bottom layer of the foamed rubber pad 4 to allow the support rod 94 to pass through. 4. The upper layer of the foam rubber pad 4 is brought into contact with the patient's head, causing the foam rubber pad 4 to open. Before the foam is injected into the foam rubber pad 4, the support rod 94 will extend upward through the mounting hole II 8 and the through hole 31. When the patient's head is placed on it, the support rod 94 will compress the spring I 932 according to the pressure of the head. The elasticity of the spring I 932 is moderate, which can support the weight of the head and make the patient feel no obvious hard object resistance, thus improving the patient's comfort. At the same time, the support rod 94 can be adjusted with the adjustment of the patient's head.

[0049] like Figure 6 The positioning mechanism 9 also includes a fixing component, which includes two positioning strips 96 slidably disposed within the lifting plate 91. The two positioning strips 96 are respectively located between two sets of connecting sleeves 93. The outer wall of the connecting sleeve 93 has a guide groove 931. Both sides of the positioning strips 96 have extension protrusions 961 corresponding to the connecting sleeves 93. The outer wall of the support rod 94 has a positioning groove 941 that cooperates with the extension protrusions 961. One end of the two positioning strips 96 is fixedly connected to the same connecting plate 98. A screw II 97 is threaded through one side of the connecting plate 98. One end of the screw II 97 is rotatably connected to the lifting plate 91. When the support rod 94 is adjusted to a suitable height, the screw II 97 is rotated, which drives the connecting plate 98 to move. The connecting plate 98 then pushes the two positioning strips 96 to slide within the lifting plate 91, causing the extension protrusions 961 to slide into the positioning grooves 941 along the guide grooves 931. The support rod 94 is then fixed and will not move up and down during the curing of the expanding foam.

[0050] The baffle strip 32 and the step rod 911 are fixedly connected by the same traction rope 6. The traction rope 6 is made of sturdy nylon material and will not break easily. When it is necessary to open the thermoplastic positioning film 5 urgently, pull the baffle strip 32, and the step rod 911 will move through the traction rope 6, so that the large end of the step rod 911 will disengage from the arc groove 912, the lifting plate 91 will fall freely, and at the same time, the baffle strip 32 will move outward, so that the insert II 33 will disengage from the wedge block 102, and the pin 10 can move upward under slight external force and disengage from the base plate 3.

[0051] When using this head and neck tumor radiotherapy auxiliary support and positioning device, first, the mobile frame 2 is fixed by inserting and connecting it to the pin hole 111 of the bed 1 via the insert plate Ⅰ21. The patient lies on the bed 1, and the head is slowly placed above the foam rubber pad 4 of the base plate 3. Rotate screw Ⅰ95 to raise the lifting plate 91, so that the support rod 94 passes through the mounting hole Ⅱ8 and the through hole 31 and contacts the patient's head. The patient can tell the medical staff how their head feels, and the medical staff adjusts the height of each support rod 94 according to the patient's feedback until the patient feels comfortable and the posture is correct. After adjustment, rotate screw Ⅱ97 to allow the extension protrusion 961 of the positioning strip 96 to enter the positioning groove 941 of the support rod 94, thus fixing the support rod 94 in place.

[0052] Next, fix the protective cover 7 onto the base plate 3, inject foam into the foamed rubber pad 4, and wait for about 30 minutes for the foam to solidify and form a support that conforms to the contour of the patient's head.

[0053] Then, the protective cover 7 is removed, the thermoplastic positioning film 5 is softened in hot water, and then it is taken out and covered on the patient's head. It is gently pressed to fit the head, and then fixed to the base plate 3 by the pin 10. After the thermoplastic positioning film 5 cools and hardens, it works with the foam rubber pad 4 to firmly fix the patient's head. The whole process is simple to operate and can accurately position the patient's head, ensuring that the radiation can accurately irradiate the tumor site during radiotherapy and improve the radiotherapy effect.

[0054] When the patient becomes too thin to fit properly after several uses, continue to rotate the rotating screw II 97 to drive the support rod 94 upwards, further supporting the head.

[0055] When it is necessary to remove the thermoplastic positioning film 5 urgently, pull the baffle strip 32 so that the insert II 33 is away from the wedge block 102. At this time, the pin 10 can be separated from the base plate 3 under slight external force. At the same time, the step rod 911 is moved by the traction rope 6, so that the large end of the step rod 911 is separated from the arc groove 912. The lifting plate 91 can drive the support rod 94 to quickly descend and reset under gravity, so as to avoid the support rod 94 from hitting the patient's head.

[0056] When the next patient needs radiotherapy, a matching mobile gantry 2 can be used.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A support and positioning device for head and neck tumor radiotherapy, characterized in that, It includes a bed (1) and a movable frame (2) for supporting the head. The movable frame (2) is provided with a base plate (3). The top of the base plate (3) is provided with a foamed rubber pad (4). The foamed rubber pad (4) is bag-shaped and filled with foam. The patient's head is placed on it before the foam solidifies. The solidified foam conforms to the contour of the patient's head. The thermoplastic positioning film (5) is fixed to the base plate (3) by multiple pins (10) and works with the foam rubber pad (4) to fix the patient's head. The top of the base plate (3) is connected to a protective cover (7) that limits the foam rubber pad (4) by multiple pins (10). The positioning mechanism (9) is located at the bottom of the mobile frame (2) and includes a lifting plate (91). Multiple connecting sleeves (93) are fixed on the top of the lifting plate (91). A support rod (94) is movably provided on the top of the connecting sleeve (93). A spring I (932) is provided inside the connecting sleeve (93). The two ends of the spring I (932) are respectively connected to the bottom of the support rod (94) and the bottom wall of the connecting sleeve (93). The bottom of the mobile frame (2) is provided with an installation hole II (8) that is compatible with the support rod (94). The top of the base plate (3) is provided with a through hole (31) that is compatible with the support rod (94). Before foaming rubber is injected into the foamed rubber pad (4), the support rod (94) passes through the mounting hole II (8) and the through hole (31) to support the patient's head.

2. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 1, characterized in that, The bed (1) has a pin hole I (11) on one side, and the movable frame (2) has inserts I (21) that are interference-fitted to the pin hole I (11) on both sides.

3. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 2, characterized in that, The baffle strip (32) has two inserts II (33) on its inner side, and the base plate (3) has slots (35) on its outer side for inserting the two inserts II (33); the baffle strip (32) is inserted into the outer side of the base plate (3), and the top of the base plate (3) has multiple mounting holes I (36) corresponding to the slots (35). A pin (10) is engaged between the mounting hole I (36) and the inserts II (33), and the baffle strip (32) is fixed to the base plate (3) by the pin (10).

4. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 3, characterized in that, The pin (10) includes a pin body (100), with an opening (101) at the bottom of the pin body (100) and a wedge (102) on the outer wall of the pin body (100) that abuts against the upper insert plate II (33). The wedge (102) gradually contacts and locks the insert plate II (33) as the pin (10) is inserted deeper.

5. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 4, characterized in that, The positioning mechanism (9) includes two guide seats (92) fixed at the bottom of the mobile frame (2). One guide seat (92) is fixed with a guide rod (921) between it and the mobile frame (2). The other guide seat (92) is rotatably provided with a screw I (95) between it and the mobile frame (2). The lifting plate (91) is slidably sleeved on the outer wall of the guide rod (921) and threaded on the screw I (95). Rotating the screw I (95) can drive the lifting plate (91) to rise and fall smoothly along the guide rod (921).

6. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 5, characterized in that, The positioning mechanism (9) includes a fixing component for positioning the adjusted support rod (94). The fixing component includes two positioning strips (96) slidably disposed in the lifting plate (91). The two positioning strips (96) are respectively located between two sets of connecting sleeves (93). The outer wall of the connecting sleeve (93) is provided with a guide groove (931). Both sides of the positioning strip (96) are provided with an extension protrusion (961) corresponding to the connecting sleeve (93). The outer wall of the support rod (94) is provided with a positioning groove (941) that cooperates with the extension protrusion (961). One end of the two positioning strips (96) is fixed with the same connecting plate (98). The outer side of the connecting plate (98) is provided with a threaded screw II (97). One end of the screw II (97) is rotatably connected to the lifting plate (91). Rotating the screw II (97) can drive the positioning strip (96) to move so that the extension protrusion (961) is engaged in the positioning groove (941).

7. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 6, characterized in that, The top of the lifting plate (91) has a limiting hole (910), and a nut collar (99) is inserted into the limiting hole (910). The nut collar (99) is threaded onto the screw rod I (95). A step rod (911) is slidably provided through one side of the lifting plate (91). A spring II (913) is sleeved on the outer wall of the step rod (911). The two ends of the spring II (913) abut against one side of the lifting plate (91) and one end of the step rod (911), respectively. An arc groove (912) is provided on the outer wall of the nut collar (99) to cooperate with the large end of the step rod (911). The spring II (913) can push the step rod (911) into the arc groove (912) to lock the position of the lifting plate (91).

8. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 7, characterized in that, The baffle strip (32) and the step rod (911) are fixedly connected by the same traction rope (6). The traction rope (6) is made of nylon. Pulling the baffle strip (32) can cause the step rod (911) to disengage from the arc groove (912) through the traction rope (6).

9. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 1, characterized in that, The thermoplastic positioning film (5) has a connection hole (51) on its surface edge for insertion into the pin (10). After the thermoplastic positioning film (5) is softened by hot water at 60-70℃, it covers the patient's head. After cooling and hardening, it is used in conjunction with the foamed rubber pad (4) to fix the head.

10. The head and neck tumor radiotherapy auxiliary support and positioning device according to claim 1, characterized in that, The bottom of the mobile frame (2) is provided with multiple support legs (22) for stable support of the mobile frame (2).

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