Fixing device and method for head radiotherapy patient

Abstract

The invention relates to the technical field of medical auxiliary instruments, in particular to a fixing device for a head radiotherapy patient, which comprises a mounting bottom plate and four fixing bolts for fixing the mounting bottom plate, the four fixing bolts are respectively arranged at four corners of the mounting bottom plate, a hollow sliding block interlayer is arranged in the mounting bottom plate in a penetrating manner, and the hollow sliding block interlayer is arranged in the mounting bottom plate in a penetrating manner. First sliding grooves are formed in the two sides of the upper surface of the mounting bottom plate correspondingly, the first sliding grooves are connected with the hollow sliding block interlayer in a penetrating mode, and two first sliding blocks are arranged in the hollow sliding block interlayer. By arranging the U-shaped neck limiting plate and the shoulder pushing block, the U-shaped neck limiting plate and the shoulder pushing block can be self-locked through the first clamping plate and the second clamping plate, the head and the shoulders of a patient can be fixed at the same time, and displacement of the head and the limiting mechanism due to slight movement of the body of the patient is effectively avoided; the stability of the head of a patient during radiotherapy is ensured, and the accuracy of radiotherapy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary devices, and particularly relates to a fixing device and method for radiotherapy patients with the head. Background Art

[0002] Radiotherapy technology is currently a relatively effective means for treating cancer and maintaining the life and health of cancer patients. When performing radiotherapy on a patient, it is necessary to accurately irradiate cancer cells with radioactive rays. Therefore, it is required that the patient remain stable during radiotherapy to avoid moving randomly, which may cause the irradiation position of the rays to change. Chinese Patent (Publication No.: CN215608858U) discloses a head fixing device for radiotherapy, including a bottom plate, a U-shaped frame fixed on the bottom plate, and a headrest disposed within the U-shaped frame. A pressing plate is provided on the inner side of the U-shaped frame, and the inner side surface of the pressing plate is an arc surface. A head cushion layer is provided on the inner side surface of the pressing plate. An arc-shaped supporting plate opposite to the pressing plate is provided at the opening of the U-shaped frame. The arc-shaped supporting plate includes a first supporting plate and a second supporting plate symmetrically arranged with the first supporting plate. The first supporting plate and the second supporting plate are hingedly arranged. A first adjusting component for adjusting the distance between the pressing plate and the arc-shaped supporting plate is provided on the U-shaped frame. A second adjusting component for adjusting the included angle between the first supporting plate and the second supporting plate is provided on the first adjusting component. A first cushion layer is provided on one side of the first supporting plate, and a second cushion layer is provided on one side of the second supporting plate.

[0003] However, there are some drawbacks in the existing radiotherapy head fixing devices during use. For example:

[0004] Most of the existing head radiotherapy devices use a plastic face mask to wrap and limit the patient's head, or use a limiting frame to limit the patient's head. However, most of these limiting devices only fix the patient's head. At the beginning, the limiting effect on the patient's head is good. However, since the patient's body is not fixed, the slight movement of the body will drive a gap to be generated between the patient's head and the limiting device. This gap easily causes the patient's head to shift, ultimately resulting in the deviation of the ray irradiation position and the reduction of the radiotherapy effect on the lesion. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a fixing device and method for radiotherapy patients with the head, so as to solve the problem that most of the existing head radiotherapy devices use a plastic face mask to wrap and limit the patient's head, or use a limiting frame to limit the patient's head. However, most of these limiting devices only fix the patient's head. At the beginning, the limiting effect on the patient's head is good. However, since the patient's body is not fixed, the slight movement of the body will drive a gap to be generated between the patient's head and the limiting device. This gap easily causes the patient's head to shift, ultimately resulting in the deviation of the ray irradiation position and the reduction of the radiotherapy effect on the lesion.

[0006] For the above purposes, the present invention provides a fixing device for radiotherapy patients' heads, including a mounting base plate and fixing bolts for fixing the mounting base plate. The four fixing bolts are respectively arranged at the four corners of the mounting base plate. A hollow slider sandwich is formed through the inside of the mounting base plate. First chutes are respectively formed on both sides of the upper surface of the mounting base plate. The first chutes are connected to the hollow slider sandwich in a penetrating manner. Two first sliding blocks are arranged inside the hollow slider sandwich. The two first sliding blocks are respectively arranged corresponding to the lower part of the first chutes. A sliding mounting rod is fixedly connected to the upper surface of the first sliding block. The sliding mounting rod penetrates through the first chute and slides inside the first chute. One end of the sliding mounting rod away from the first sliding block is rotatably connected to a U-shaped neck limiting plate. Both ends of the U-shaped neck limiting plate slide inside the first chute through the sliding mounting rod and the first sliding block. The U-shaped neck limiting plate is used to limit the neck of the patient.

[0007] Furthermore, first limit racks are formed on both sides of the upper surface of the mounting base plate and located at both sides of the first chute. A first clamping plate is rotatably mounted at the bottom of the sliding mounting rod through a rotating shaft. A torsion spring is arranged between the first clamping plate and the sliding mounting rod. The first clamping plate is matched with the first limit rack. The first clamping plate is used to limit the position of the sliding mounting rod through the first limit rack.

[0008] Furthermore, a lower jaw support is fixedly connected to the upper surface of the U-shaped neck limiting plate. The U-shaped neck limiting plate is clamped and fixed on the lower jaw of the patient through the lower jaw support. The lower jaw support is used to limit the lower jaw of the patient.

[0009] Furthermore, a transverse connecting rod is fixedly connected between the two first sliding blocks. A pull rod is vertically fixedly connected to the center of the transverse connecting rod. The transverse connecting rod and the pull rod are both arranged inside the hollow slider sandwich. One end of the pull rod away from the transverse connecting rod is fixedly connected to a handle. The handle is used to simultaneously pull the two first sliding blocks through the pull rod and the transverse connecting rod.

[0010] Furthermore, a head baffle is fixedly connected to the upper surface of the mounting base plate. The head baffle is arranged corresponding to the U-shaped neck limiting plate. The head baffle is used to cooperate with the U-shaped neck limiting plate to limit the head of the patient. A headrest is placed on the upper surface of the mounting base plate. The headrest is arranged in the middle of the head baffle. The headrest is used to pad under the head of the patient.

[0011] Further, second chutes are respectively formed on both sides of the upper surface of the mounting base plate. The second chutes are formed outside the first chutes. The second chutes are connected to the inside of the hollow slider sandwich in a penetrating manner. Two second sliding blocks are arranged inside the hollow slider sandwich. The two second sliding blocks are respectively arranged corresponding to the lower sides of the second chutes. A sliding connecting rod is fixedly connected to the upper surface of the second sliding block. The sliding connecting rod penetrates through the second chute. The sliding connecting rod slides inside the second chute. One end of the sliding connecting rod away from the second sliding block is fixedly connected to a push rod. The push rod is arranged perpendicular to the sliding connecting rod. One end of the push rod away from the sliding connecting rod is fixedly connected to a shoulder pushing block. The shoulder pushing block slides inside the second chute through the push rod, the sliding connecting rod and the second sliding block. The shoulder pushing block is used to push and limit the shoulders of the patient.

[0012] Further, second limiting racks are formed on both sides of the upper surface of the mounting base plate where the second chutes are located. A second clamping plate is rotatably installed at the bottom of the sliding connecting rod through a rotating shaft. A torsion spring is arranged between the second clamping plate and the sliding connecting rod. The second clamping plate is matched with the second limiting rack. The second clamping plate is used to limit the position of the sliding connecting rod through the second limiting rack. The opening directions of the first limiting rack and the second limiting rack are opposite.

[0013] A using method of a fixing device for radiotherapy patients of the head includes the following steps:

[0014] S1. Mounting of the base plate:

[0015] Use the fixing bolts to respectively fix the four corners of the mounting base plate on the upper surface of the radiotherapy device. Then, pull the handle outwards, so that the handle pulls the sliding mounting rod and the first sliding block towards the head baffle through the pull rod and the transverse connecting rod, thereby making the U-shaped neck limiting plate also move towards the head baffle at the same time. Subsequently, turn the U-shaped neck limiting plate upwards around the sliding mounting rod for standby.

[0016] S2. Fixing of the head:

[0017] Let the patient lie flat on the radiotherapy device with their head resting on the headrest, and at the same time press the top of the patient's head against the head baffle. Then, press the two first clamping plates simultaneously, so that the first clamping plates disengage from the clamping and limiting of the first limiting rack. Subsequently, push the two sliding mounting rods simultaneously to move the U-shaped neck limiting plate to the patient's lower jaw. Fold the U-shaped neck limiting plate downward so that the lower jaw support is stuck at the patient's lower jaw. Then, pull the handle to pull the U-shaped neck limiting plate towards the head baffle through the pull rod, the horizontal connecting rod, and the sliding mounting rod, so that the U-shaped neck limiting plate and the head baffle cooperate to fix the patient's head;

[0018] S3. Shoulder fixation:

[0019] After the head fixation is completed, push the second sliding block and the sliding connecting rod inside the second chute towards the patient's shoulder, so that the shoulder pushing block presses on the patient's shoulder. Due to the limiting effect of the second clamping plate on the sliding connecting rod and the second limiting rack, the force of the patient's shoulder cannot push the shoulder pushing block away.

[0020] Advantages of the present invention:

[0021] By setting the U-shaped neck limiting plate and the shoulder pushing block, the present invention can rely on the first clamping plate and the second clamping plate to self-lock the U-shaped neck limiting plate and the shoulder pushing block, and can fix the patient's head and shoulder simultaneously, effectively avoiding the displacement between the head and the limiting mechanism caused by the slight movement of the patient's body, ensuring the stability of the patient's head during radiotherapy, and improving the accuracy of radiotherapy. Description of the drawings

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic three-dimensional structure diagram of the product in an embodiment of the present invention;

[0024] Figure 2 For the present invention Figure 1 It is a schematic front view structure diagram of the product in an embodiment of the present invention;

[0025] Figure 3 For the present invention Figure 1 It is a schematic top view structure diagram of the product in an embodiment of the present invention;

[0026] Figure 4For the present invention Figure 1 Schematic side view structure diagram of the product in the embodiment

[0027] Figure 5 For the present invention Figure 1 Schematic three-dimensional structure diagram of the U-shaped neck limiting plate of the product in the embodiment

[0028] Figure 6 For the present invention Figure 1 Schematic three-dimensional structure diagram of the shoulder pushing block of the product in the embodiment

[0029] The markings in the figure are as follows

[0030] 101, mounting base plate; 102, fixing bolt; 103, first sliding groove; 104, sliding mounting rod; 105, first sliding block; 106, U-shaped neck limiting plate; 107, hollow slider sandwich; 201, first limiting rack; 202, first clamping plate; 300, lower jaw support; 401, transverse connecting rod; 402, pull rod; 403, handle; 501, head baffle; 502, headrest; 601, second sliding groove; 602, second sliding block; 603, sliding connecting rod; 604, push rod; 605, shoulder pushing block; 701, second limiting rack; 702, second clamping plate Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments

[0032] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly

[0033] Please refer to Figures 1-6 together, where Figure 1 Schematic three-dimensional structure diagram of the product in an embodiment of the present invention Figure 2 For the present invention Figure 1 Schematic front view structure diagram of the product in the embodimentFigure 3 For the present invention Figure 1 Schematic top view of the overall structure of the product in the embodiment; Figure 4 For the present invention Figure 1 Schematic side view of the overall structure of the product in the embodiment; Figure 5 For the present invention Figure 1 Schematic three-dimensional structure view of the U-shaped neck limiting plate of the product in the embodiment; Figure 6 For the present invention Figure 1 Schematic three-dimensional structure view of the shoulder push block of the product in the embodiment.

[0034] A fixing device for radiotherapy patients' heads, comprising a mounting base plate 101 and fixing bolts 102 for fixing the mounting base plate 101. The four fixing bolts 102 are respectively arranged at the four corners of the mounting base plate 101. A hollow slider sandwich layer 107 is formed through the inside of the mounting base plate 101. First chutes 103 are respectively formed on both sides of the upper surface of the mounting base plate 101. The first chutes 103 are in through connection with the hollow slider sandwich layer 107. Two first sliding blocks 105 are arranged inside the hollow slider sandwich layer 107. The two first sliding blocks 105 are respectively arranged corresponding to the lower part of the first chutes 103. A sliding mounting rod 104 is fixedly connected to the upper surface of the first sliding block 105. The sliding mounting rod 104 penetrates through the first chute 103. The sliding mounting rod 104 slides inside the first chute 103. One end of the sliding mounting rod 104 away from the first sliding block 105 is rotatably connected to a U-shaped neck limiting plate 106. Both ends of the U-shaped neck limiting plate 106 slide inside the first chute 103 through the sliding mounting rod 104 and the first sliding block 105 respectively. The U-shaped neck limiting plate 106 is used to limit the neck of the patient;

[0035] By setting the U-shaped neck limiting plate 106 and the shoulder push block 605, the present invention can self-lock the U-shaped neck limiting plate 106 and the shoulder push block 605 by relying on the first clamping plate 202 and the second clamping plate 702, can fix the head and shoulders of the patient at the same time, effectively avoids the displacement between the head and the limiting mechanism caused by the slight movement of the patient's body, ensures the stability of the patient's head during radiotherapy, and improves the accuracy of radiotherapy.

[0036] Furthermore, first limiting racks 201 are arranged on both sides of the upper surface of the mounting base plate 101 and located at both sides of the first chute 103. A first clamping plate 202 is rotatably mounted at the bottom of the sliding mounting rod 104 through a rotating shaft. A torsion spring is arranged between the first clamping plate 202 and the sliding mounting rod 104. The first clamping plate 202 is matched with the first limiting rack 201. The first clamping plate 202 is used to limit the position of the sliding mounting rod 104 through the first limiting rack 201;

[0037] Among them, the inclination direction of the first limit rack 201 faces the patient's head direction, and a torsion spring is provided between the first clamping plate 202 and the sliding mounting rod 104, so that one end of the first clamping plate 202 is always pushed by the torsion spring and abuts against the first limit rack 201. When the sliding mounting rod 104 is pushed towards the patient's head direction, at this time, since the first clamping plate 202 just follows the direction of the first limit rack 201, the movement of the sliding mounting rod 104 is not blocked. When the U-shaped neck limiting plate 106 is moved to a predetermined position, at this time, the U-shaped neck limiting plate 106 has pulled the patient's neck upward. However, due to the weight of the patient's head and other reasons, the U-shaped neck limiting plate 106 will be pulled downward. At this time, since the first clamping plate 202 just catches on the first limit rack 201, the patient's head cannot pull the U-shaped neck limiting plate 106 downward, thereby realizing the limiting and fixing of the patient's head. In order to ensure the stability of the U-shaped neck limiting plate 106 in fixing the patient's head, the U-shaped neck limiting plate 106 needs to be made of a rigid material with high rigidity and not easily deformed.

[0038] Furthermore, a lower jaw support 300 is fixedly connected to the upper surface of the U-shaped neck limiting plate 106. The U-shaped neck limiting plate 106 is fixedly connected to the patient's lower jaw through the lower jaw support 300, and the lower jaw support 300 is used to limit the patient's lower jaw;

[0039] Since the U-shaped neck limiting plate 106 will be strangled on the patient's neck, in order to avoid blocking the patient's breathing, a lower jaw support 300 is provided on the U-shaped neck limiting plate 106, so that the fixing force of the U-shaped neck limiting plate 106 on the patient's head is transmitted to the patient's lower jaw through the lower jaw support 300, avoiding the U-shaped neck limiting plate 106 directly strangling on the patient's neck and ensuring the comfort of the patient's use.

[0040] Furthermore, a transverse connecting rod 401 is fixedly connected between the two first sliding blocks 105. A pull rod 402 is vertically fixedly connected to the center of the transverse connecting rod 401. The transverse connecting rod 401 and the pull rod 402 are both arranged inside the hollow slider sandwich 107. One end of the pull rod 402 away from the transverse connecting rod 401 is fixedly connected to a handle 403, and the handle 403 is used to simultaneously pull the two first sliding blocks 105 through the pull rod 402 and the transverse connecting rod 401;

[0041] Among them, using the transverse connecting rod 401 to connect the two first sliding blocks 105 together can facilitate the simultaneous pulling of the two first sliding blocks 105 by the handle 403 and the pull rod 402, which is convenient for the user to operate.

[0042] Further, a head baffle 501 is fixedly connected to the upper surface of the mounting base plate 101. The head baffle 501 is arranged corresponding to the U-shaped neck limiting plate 106. The head baffle 501 is used to cooperate with the U-shaped neck limiting plate 106 to limit the head of the patient. A headrest 502 is placed on the upper surface of the mounting base plate 101. The headrest 502 is arranged in the middle of the head baffle 501. The headrest 502 is used to pad under the head of the patient;

[0043] Among them, since there is no fixing mechanism at the top when the U-shaped neck limiting plate 106 pulls and limits the head of the patient upward, the head baffle 501 is provided to block and fix the top of the head, so that the U-shaped neck limiting plate 106 and the head baffle 501 can limit the head of the patient between the two, further improving the fixation of the head of the patient.

[0044] Further, second sliding grooves 601 are respectively formed on both sides of the upper surface of the mounting base plate 101. The second sliding grooves 601 are formed outside the first sliding grooves 103. The second sliding grooves 601 are connected to the hollow slider sandwich layer 107 in a penetrating manner. Two second sliding blocks 602 are arranged inside the hollow slider sandwich layer 107. The two second sliding blocks 602 are respectively arranged corresponding to the lower part of the second sliding grooves 601. A sliding connecting rod 603 is fixedly connected to the upper surface of the second sliding block 602. The sliding connecting rod 603 penetrates through the second sliding groove 601. The sliding connecting rod 603 slides inside the second sliding groove 601. One end of the sliding connecting rod 603 away from the second sliding block 602 is fixedly connected to a push rod 604. The push rod 604 is perpendicular to the sliding connecting rod 603. One end of the push rod 604 away from the sliding connecting rod 603 is fixedly connected to a shoulder pushing block 605. The shoulder pushing block 605 slides inside the second sliding groove 601 through the push rod 604, the sliding connecting rod 603 and the second sliding block 602. The shoulder pushing block 605 is used to push and limit the shoulders of the patient; Second limiting racks 701 are formed on both sides of the upper surface of the mounting base plate 101 where the second sliding grooves 601 are located. A second clamping plate 702 is rotatably installed at the bottom of the sliding connecting rod 603 through a rotating shaft. A torsion spring is arranged between the second clamping plate 702 and the sliding connecting rod 603. The second clamping plate 702 is matched with the second limiting rack 701. The second clamping plate 702 is used to limit the position of the sliding connecting rod 603 through the second limiting rack 701. The opening directions of the first limiting rack 201 and the second limiting rack 701 are opposite;

[0045] Among them, in order to prevent the head of the patient from moving due to slight movement of the patient's body, a shoulder push block 605 is provided, so that the U-shaped neck limiting plate 106 pulls the patient's head upward, and at the same time, the shoulder push block 605 pushes the patient's shoulders downward, so that the shoulder push block 605 blocks the movement on the patient's body below the shoulders, effectively blocking the influence of body movement on the patient's head;

[0046] When using the shoulder push block 605, its principle is the same as that of the U-shaped neck limiting plate 106. When the shoulder push block 605 is pushed towards the patient's shoulders, the second clamping plate 702 just moves along the second limiting rack 701, so that the second limiting rack 701 does not block the movement of the sliding connecting rod 603. When the shoulder push block 605 is pushed to the predetermined position, if the patient's shoulders move and tend to push the shoulder push block 605, the second clamping plate 702 on the sliding connecting rod 603 just gets stuck on the second limiting rack 701, which can prevent the movement of the second clamping plate 702, and further prevent the movement of the shoulder push block 605, thereby blocking the movement of the shoulders and avoiding the transfer of the shoulder movement to the patient's head resulting in head offset.

[0047] A method for using a fixing device for radiotherapy patients' heads includes the following steps:

[0048] S1. Installation of the bottom plate:

[0049] Use the fixing bolts 102 to fix the four corners of the installation bottom plate 101 on the upper surface of the radiotherapy device respectively, and then pull the handle 403 outwards, so that the handle 403 pulls the sliding installation rod 104 and the first sliding block 105 towards the head baffle 501 through the pull rod 402 and the transverse connecting rod 401, so that the U-shaped neck limiting plate 106 also moves towards the head baffle 501 at the same time, and then turn the U-shaped neck limiting plate 106 upwards around the sliding installation rod 104 for standby;

[0050] S2. Fixing of the head:

[0051] Let the patient lie flat on the radiotherapy device with their head resting on the headrest 502, and at the same time press the top of the patient's head against the head baffle 501. Then press the two first clamping plates 202 simultaneously, so that the first clamping plates 202 disengage from the clamping limit of the first limit rack 201. Subsequently, push the two sliding mounting rods 104 simultaneously to move the U-shaped neck limiting plate 106 to the patient's lower jaw. Fold down the U-shaped neck limiting plate 106 so that the lower jaw support 300 is clamped at the patient's lower jaw. Then pull the handle 403 to pull the U-shaped neck limiting plate 106 towards the head baffle 501 through the pull rod 402, the transverse connecting rod 401, and the sliding mounting rod 104, so that the U-shaped neck limiting plate 106 and the head baffle 501 cooperate to fix the patient's head;

[0052] S3. Shoulder fixation:

[0053] After the head fixation is completed, push the second sliding block 602 and the sliding connecting rod 603 inside the second chute 601 towards the patient's shoulder, so that the shoulder pushing block 605 presses on the patient's shoulder. Due to the limiting effect of the second clamping plate 702 on the sliding connecting rod 603 and the second limit rack 701, the force of the patient's shoulder cannot push the shoulder pushing block 605 away.

[0054] In summary, by setting the U-shaped neck limiting plate 106 and the shoulder pushing block 605, the present invention can rely on the first clamping plate 202 and the second clamping plate 702 to self-lock the U-shaped neck limiting plate 106 and the shoulder pushing block 605, and can fix the patient's head and shoulder simultaneously, effectively avoiding the displacement between the head and the limiting mechanism caused by the slight movement of the patient's body, ensuring the stability of the patient's head during radiotherapy, and improving the accuracy of radiotherapy.

[0055] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary, and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0056] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fixing device for a head radiotherapy patient, comprising a mounting base plate (101) and fixing bolts (102) for fixing the mounting base plate (101), wherein four fixing bolts (102) are respectively arranged at four corners of the mounting base plate (101), characterized in that: A hollow slider interlayer (107) is provided inside the installation base plate (101), and first slide grooves (103) are provided on both sides of the upper surface of the installation base plate (101). The first slide grooves (103) are connected to the hollow slider interlayer (107). Two first sliding blocks (105) are provided inside the hollow slider interlayer (107). The two first sliding blocks (105) are respectively provided below the first slide grooves (103). The upper surface of the first sliding block (105) is fixedly connected to a sliding installation rod (104). The sliding mounting rod (104) is arranged to pass through the first sliding groove (103), and the sliding mounting rod (104) slides inside the first sliding groove (103). The sliding mounting rod (104) is rotatably connected to one end away from the first sliding block (105) with a U-shaped neck limiting plate (106). The two ends of the U-shaped neck limiting plate (106) slide inside the first sliding groove (103) through the sliding mounting rod (104) and the first sliding block (105) respectively, and the U-shaped neck limiting plate (106) is used to limit the patient's neck.

2. The fixation device for head radiotherapy patients according to claim 1, characterized in that: The upper surface of the mounting base plate (101) is provided with first limiting racks (201) on both sides of the first sliding groove (103); a first clamping plate (202) is rotatably installed at the bottom of the sliding mounting rod (104) via a rotating shaft; a torsion spring is provided between the first clamping plate (202) and the sliding mounting rod (104); the first clamping plate (202) cooperates with the first limiting rack (201); the first clamping plate (202) is used to limit the position of the sliding mounting rod (104) via the first limiting rack (201).

3. The fixation device for head radiotherapy patients according to claim 1, characterized in that: The upper surface of the U-shaped neck limiting plate (106) is fixedly connected with a lower jaw support (300); the U-shaped neck limiting plate (106) is fixed to the lower jaw of the patient through the lower jaw support (300); and the lower jaw support (300) is used to limit the lower jaw of the patient.

4. The fixation device for head radiotherapy patients according to claim 1, characterized in that: A transverse connecting rod (401) is fixedly connected between the two first sliding blocks (105), and a pull rod (402) is vertically fixedly connected to the center of the transverse connecting rod (401). The transverse connecting rod (401) and the pull rod (402) are both arranged inside the hollow slider interlayer (107), and a handle (403) is fixedly connected to one end of the pull rod (402) away from the transverse connecting rod (401). The handle (403) is used to pull the two first sliding blocks (105) simultaneously through the pull rod (402) and the transverse connecting rod (401).

5. The fixation device for head radiotherapy patients according to claim 1, characterized in that: A head baffle (501) is fixedly connected to the upper surface of the mounting base plate (101), the head baffle (501) is arranged corresponding to the U-shaped neck limiting plate (106), and the head baffle (501) is used to cooperate with the U-shaped neck limiting plate (106) to limit the patient's head. A headrest (502) is placed on the upper surface of the mounting base plate (101), and the headrest (502) is arranged in the middle of the head baffle (501), and the headrest (502) is used to cushion under the patient's head.

6. The fixation device for head radiotherapy patients according to claim 2, characterized in that: Second slide grooves (601) are respectively provided on both sides of the upper surface of the mounting base plate (101), and the second slide grooves (601) are provided on the outside of the first slide groove (103). The second slide groove (601) is connected with the hollow slider interlayer (107). Two second sliding blocks (602) are arranged inside the hollow slider interlayer (107), and the two second sliding blocks (602) are respectively arranged below the second slide groove (601). A sliding connecting rod (603) is fixedly connected to the upper surface of the second sliding block (602), and the sliding connecting rod (603) is arranged to pass through the second slide groove (601). The connecting rod (603) slides inside the second sliding groove (601), and the end of the sliding connecting rod (603) away from the second sliding block (602) is fixedly connected to a push rod (604), and the push rod (604) and the sliding connecting rod (603) are arranged perpendicular to each other. The end of the push rod (604) away from the sliding connecting rod (603) is fixedly connected to a shoulder push block (605), and the shoulder push block (605) slides inside the second sliding groove (601) through the push rod (604), the sliding connecting rod (603) and the second sliding block (602), and the shoulder push block (605) is used to push the shoulder of the patient to limit the position.

7. The fixation device for head radiotherapy patients according to claim 6, characterized in that: The upper surface of the mounting base plate (101) is provided with second limiting racks (701) on both sides of the second slide groove (601); a second clamping plate (702) is rotatably installed at the bottom of the sliding connecting rod (603) via a rotating shaft; a torsion spring is provided between the second clamping plate (702) and the sliding connecting rod (603); the second clamping plate (702) cooperates with the second limiting rack (701); the second clamping plate (702) is used to limit the position of the sliding connecting rod (603) via the second limiting rack (701); the opening directions of the first limiting rack (201) and the second limiting rack (701) are opposite.

8. The method for using the fixation device for head radiotherapy patients according to any one of claims 1 to 7, characterized in that: The steps include: S1. Bottom plate installation: The four corners of the mounting base plate (101) are fixed to the upper surface of the radiotherapy device by using the fixing bolts (102), and then the handle (403) is pulled outward, so that the handle (403) pulls the sliding mounting rod (104) and the first sliding block (105) toward the head baffle (501) through the pull rod (402) and the transverse connecting rod (401), thereby causing the U-shaped neck limiting plate (106) to move toward the head baffle (501) at the same time, and then the U-shaped neck limiting plate (106) is folded upward around the sliding mounting rod (104) for standby use; S2. Head fixation: The patient is allowed to lie flat on the radiotherapy device and rest his head on the headrest (502), and the patient's head is placed on the head baffle (501), and then the two first clamping plates (202) are pressed simultaneously, so that the first clamping plates (202) are disengaged from the clamping limit of the first limit rack (201), and then the two sliding mounting rods (104) are pushed simultaneously, so that the U-shaped neck limit plate (106) moves to the patient's lower jaw, and the U-shaped neck limit plate (106) is folded downward so that the lower jaw support (300) is clamped on the patient's lower jaw, and then the handle (403) is pulled through the pull rod (402), the transverse connecting rod (401) and the sliding mounting rod (104) to pull the U-shaped neck limit plate (106) toward the head baffle (501), so that the U-shaped neck limit plate (106) cooperates with the head baffle (501) to fix the patient's head; S3, Shoulder Fixation: After the head is fixed, the second sliding block (602) and the sliding connecting rod (603) are pushed toward the patient's shoulder inside the second sliding groove (601), so that the shoulder pushing block (605) is pressed on the patient's shoulder. Due to the limiting effect of the second clamping plate (702) and the second limiting rack (701) on the sliding connecting rod (603), the force of the patient's shoulder cannot push the shoulder pushing block (605) away.

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