Visualizing brachytherapy applicators for cervical cancer

Abstract

The application discloses a visual cervical cancer brachytherapy applicator and relates to the technical field of cervical cancer radiotherapy devices. The device comprises a main handle, a connecting device, an outer wall of the connecting device being rotationally connected with the middle part of the outer wall of the main handle, a radiation rod, an outer wall of the radiation rod being fixedly connected with the inner wall of the connecting device, a visualization device, an inner wall of the visualization device being fixedly connected with the outer wall of the radiation rod, a secondary handle, the bottom of the secondary handle being rotationally connected with the bottom of the connecting device, a limiting device, an inner wall of the limiting device being fixedly connected with the outer wall of the main handle, and a locking device, an outer wall of the locking device being slidingly connected with the outer wall of the secondary handle. The camera is arranged to make the applicator have a visual function, assist doctors in adjusting the position of the applicator and the tumor, and reduce the side reaction in the operation. The doctors can accurately place the applicator, the cure rate of the patients is improved, and the purpose of increasing the visual function of the applicator is achieved.

Description

Technical Field

[0001] This invention relates to the field of cervical cancer radiotherapy equipment technology, specifically to a visual cervical cancer brachytherapy applicator. Background Technology

[0002] A radiation applicator is a medical device used in brachytherapy to accurately place a radiation source onto the site or area requiring treatment. Through proper design, it can be well-fitted to human tissues and precisely guide radiation energy to the lesion, achieving targeted treatment of tumors and other lesions while minimizing damage to surrounding normal tissues. It plays an important role in the treatment of diseases such as cancer.

[0003] In existing technologies, the probe cannot quickly locate the cervix, and the removal of the speculum causes misalignment between the applicator and the tumor. This not only increases patient discomfort during the procedure, but also reduces treatment effectiveness and increases side effects due to the change in the position of the applicator and the tumor. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is: a visual brachytherapy applicator for cervical cancer, comprising: a main gripping rod; a connecting device, the outer wall of which is rotatably connected to the middle of the outer wall of the main gripping rod; a radiation rod, the outer wall of which is fixedly connected to the inner wall of the connecting device; a visualization device, the inner wall of which is fixedly connected to the outer wall of the radiation rod; a secondary gripping rod, the bottom of which is rotatably connected to the bottom of a connecting device; a limiting device, the inner wall of which is fixedly connected to the outer wall of the main gripping rod; and a locking device, the outer wall of which is slidably connected to the outer wall of the secondary gripping rod; the visualization device includes a fixing device, the top of which is fixedly connected to a connecting rod. The connecting block has an arc-shaped block slidably connected to its outer wall, and an internally threaded column fixedly connected to its inner wall. The inner wall of the arc-shaped block is fixedly connected to the outer wall of the magnetic ring, and a camera is slidably connected to its inner wall. The fixing device includes a fixing block, a connecting cylinder fixedly connected to its outer wall, an anti-radiation tube fixedly connected to the end of the connecting cylinder away from the fixing block, an installation groove fixedly connected to the top of the anti-radiation tube, and an anti-detachment protrusion fixedly connected to the side wall of the installation groove. The camera enables the applicator to have a visual function, assisting doctors in adjusting the position of the applicator and the tumor, thereby shortening the operation time and reducing side effects during surgery. It can help doctors accurately place the applicator, thus improving the cure rate of patients.

[0005] Preferably, the connecting block is fixedly connected to the outer wall of the internally threaded column by bolts, the outer wall of the magnetic ring is slidably connected to the outer wall of the connecting block, the outer wall of the camera is slidably connected to the outer wall of the mounting groove by a signal line, the outer wall of the camera is slidably connected to the outer wall of the fixing block, the inner wall of the fixing block is fixedly connected to the outer wall of the radiation rod, and the inner wall of the connecting cylinder and the inner wall of the anti-radiation tube are both fixedly connected to the outer wall of the radiation rod. The installation device is set to assist the camera in installation, making the camera easy to disassemble and replace, while reducing the impact of radiation on the camera image.

[0006] Preferably, the connecting device includes a connecting column, the inner wall of which is fixedly connected to the outer wall of the radiation rod through a connecting hole, and the connecting hole is opened in the wall of the connecting column. The inner wall of the connecting column is fixedly connected to the outer wall of the mounting groove through a through hole, and the through hole is opened in the wall of the connecting column. A telescopic rod is fixedly connected to the outer wall of the connecting column. A connecting bridge is fixedly connected to the bottom of the telescopic rod. A movable plate is fixedly connected to the bottom of the connecting bridge. A fixed plate is fixedly connected to the bottom of the connecting column. A clamping block is threadedly connected to the outer wall of the top of the connecting column. The inner wall of the fixed plate and the side wall of the connecting column are slidably connected to the outer wall of the connecting bridge. By setting up the connecting device and adjusting the connecting device, the applicator can be fixed on the hospital bed or support, reducing the force on the vaginal wall of the patient and thus alleviating the pain suffered by the patient during radiotherapy.

[0007] Preferably, the limiting device includes a fixed cylinder, a limiting frame is fixedly connected to the outer wall of the fixed cylinder, a slider is slidably connected to the inner wall of the limiting frame, a limiting strip is slidably connected to the outer wall of the slider, a rotating shaft is rotatably connected to the inner wall of the slider, a sliding cylinder is fixedly connected to the outer wall of the rotating shaft, the inner wall of the sliding cylinder is slidably connected to the outer wall of the secondary grip, the outer wall of the limiting strip is fixedly connected to the outer wall of the limiting frame, and the inner wall of the fixed cylinder is fixedly connected to the outer wall of the main grip.

[0008] Preferably, the locking device includes a sleeve, the outer wall of which is fixedly connected to an elastic friction plate. A rotating ring is rotatably connected to the end of the sleeve away from the elastic friction plate. An internally threaded protrusion is formed in the wall of the rotating ring. The outer wall of the internally threaded protrusion is threadedly connected to the outer wall of the secondary grip rod through a connecting thread, and the connecting thread is formed in the wall of the secondary grip rod. The outer wall of the secondary grip rod is slidably connected to the outer wall of the sleeve. The limiting device and the locking device are used in conjunction to avoid single-handed operation when stabilizing the distance between the top ends of the main grip rod and the secondary grip rod. This makes adjusting the distance between the ends of the main grip rod and the secondary grip rod more stable, avoids instability during single-handed operation, and reduces the displacement of the applicator in the patient's body.

[0009] The beneficial effects of this invention are as follows:

[0010] 1. This invention enables the applicator to have a visual function by setting up a camera, which helps doctors adjust the position of the applicator and the tumor, thereby shortening the operation time and reducing the side effects during surgery. It can help doctors accurately place the applicator, thereby improving the cure rate of patients.

[0011] 2. This invention assists in the installation of the camera by setting up an installation device, which makes the camera easy to disassemble and replace, while preventing the camera connection from falling off and coming into contact with the patient's body, reducing patient discomfort, and reducing the impact of radiation on the camera image.

[0012] 3. By using a limiting device and a locking device together, this invention can avoid single-handed operation when stabilizing the distance between the top ends of the main grip and the secondary grip, thus making the adjustment of the distance between the ends of the main grip and the secondary grip more stable, avoiding instability during single-handed operation, and reducing the displacement of the applicator in the patient's body.

[0013] 4. This invention clamps the radiation rod by setting the positions of the main gripper and the secondary gripper ports, making the applicator tip stable when it enters, and allowing the tip to smoothly enter the cervix.

[0014] 5. By setting up a connecting device and adjusting the connecting device, the applicator can be fixed on the hospital bed or support, reducing the force on the vaginal wall of the patient and thus alleviating the pain suffered by the patient during radiotherapy. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention;

[0016] Figure 2 This is a rear view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is an enlarged schematic diagram of the structure at point A of the present invention;

[0019] Figure 5 This is a schematic diagram of the locking device of the present invention;

[0020] Figure 6 This is a schematic diagram of the connecting device of the present invention;

[0021] Figure 7 This is a schematic diagram of the limiting device of the present invention;

[0022] Figure 8 This is a schematic diagram of the fixing device of the present invention.

[0023] In the diagram: 1. Main grip; 2. Connecting device; 3. Radial rod; 4. Visual device; 5. Secondary grip; 6. Clamping block; 7. Limiting device; 8. Locking device; 9. Connecting thread; 21. Connecting column; 22. Connecting hole; 23. Through hole; 24. Telescopic rod; 25. Connecting bridge; 26. Movable plate; 27. Fixed plate; 41. Fixing device; 42. Connecting block; 43. Arc-shaped block; 44. Internally threaded column; 45. Magnetic ring; 46. Camera; 411. Fixed block; 412. Connecting cylinder; 413. Radiation-resistant tube; 414. Mounting groove; 415. Anti-detachment protrusion; 71. Limiting frame; 72. Fixed cylinder; 73. Slider; 74. Limiting strip; 75. Rotating shaft; 76. Sliding cylinder; 81. Sleeve; 82. Elastic friction plate; 83. Rotating ring; 84. Internally threaded protrusion. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0025] Example 1:

[0026] Please see Figure 1 - Figure 5This invention provides a technical solution: a visual cervical cancer brachytherapy applicator, comprising: a main grip 1; a connecting device 2, the outer wall of the connecting device 2 being rotatably connected to the middle of the outer wall of the main grip 1; a radiation rod 3, the outer wall of the radiation rod 3 being fixedly connected to the inner wall of the connecting device 2; a visualization device 4, the inner wall of the visualization device 4 being fixedly connected to the outer wall of the radiation rod 3; a secondary grip 5, the bottom of the secondary grip 5 being rotatably connected to the bottom of the connecting device 2; a limiting device 7, the inner wall of the limiting device 7 being fixedly connected to the outer wall of the main grip 1; and a locking device 8, the outer wall of the locking device 8 being slidably connected to the outer wall of the secondary grip 5; the visualization device 4 includes a fixing device 41, a connecting block 42 being fixedly connected to the top of the fixing device 41, an arc-shaped block 43 being slidably connected to the outer wall of the connecting block 42, an internally threaded column 44 being fixedly connected to the inner wall of the arc-shaped block 43, the inner wall of the arc-shaped block 43 being fixedly connected to the outer wall of a magnetic ring 45, and a camera 46 being slidably connected to the inner wall of the arc-shaped block 43; the fixing device 41 includes a fixing Block 411 is fixedly connected to a connecting cylinder 412 on its outer wall. A radiation-resistant tube 413 is fixedly connected to the end of the connecting cylinder 412 away from the fixed block 411. An installation groove 414 is fixedly connected to the top of the radiation-resistant tube 413. An anti-detachment protrusion 415 is fixedly connected to the side wall of the installation groove 414. The visualization device 4 allows the radiation rod 3 to obtain the internal structure of the patient's vagina through the camera 46 on the fixed device 41 when it moves, so that medical staff can quickly and accurately locate the cervix and accelerate the exploration process of radiotherapy. The camera 46 is installed on the connecting block 42, and then an arc-shaped block 43 is placed on top. Due to the attraction of the magnetic ring 45 inside the arc-shaped block 43, the arc-shaped block 43 is attracted to the steel connecting block 42 for initial positioning. Then, the arc-shaped block 43 and the connecting block 42 can be further fixed by screwing a bolt into the internal threaded column 44, thereby fixing the position of the camera 46. Since the camera 46 is detachable, it is easy to disassemble and replace.

[0027] The connecting block 42 is fixedly connected to the outer wall of the internally threaded column 44 by bolts. The outer wall of the magnetic ring 45 is slidably connected to the outer wall of the connecting block 42. The outer wall of the camera 46 is slidably connected to the outer wall of the mounting groove 414 by a signal line. The outer wall of the camera 46 is slidably connected to the outer wall of the fixing block 411. The inner wall of the fixing block 411 is fixedly connected to the outer wall of the radiation rod 3. The inner walls of the connecting cylinder 412 and the inner walls of the anti-radiation tube 413 are both fixedly connected to the outer wall of the radiation rod 3. The main grip rod 1 and the secondary grip rod 5 are set to clamp the visualization device 4 and the radiation rod 3, reducing the vibration at the top of the radiation rod 3, reducing the patient's discomfort, and making the image acquired by the camera 46 clearer.

[0028] Example 2:

[0029] Please see Figure 1 - Figure 8The present invention provides a technical solution: Based on Embodiment 1, the connecting device 2 includes a connecting column 21. The inner wall of the connecting column 21 is fixedly connected to the outer wall of the radial rod 3 through a connecting hole 22, and the connecting hole 22 is opened in the wall of the connecting column 21. The inner wall of the connecting column 21 is fixedly connected to the outer wall of the mounting groove 414 through a through hole 23, and the through hole 23 is opened in the wall of the connecting column 21. A telescopic rod 24 is fixedly connected to the outer wall of the connecting column 21. A connecting bridge 25 is fixedly connected to the bottom of the telescopic rod 24. A movable plate 26 is fixedly connected to the bottom of the connecting bridge 25. A fixed plate 27 is fixedly connected to the bottom of the connecting column 21. A clamping block 6 is threadedly connected to the outer wall of the top of the connecting column 21. The inner wall of the fixing plate 27 and the side wall of the connecting column 21 are slidably connected to the outer wall of the connecting bridge 25. Pulling the movable plate 26 downward causes the connecting bridge 25 to move downward synchronously, thereby stretching the telescopic rod 24 with the connecting column 21. The telescopic rod 24 has a tensile effect and is in a retracted state when not under force. At this time, the telescopic rod 24 is stretched, creating a gap between the movable plate 26 and the fixing plate 27. After the bracket is passed through this gap, the tension of the movable plate 26 is released, causing the telescopic rod 24 to retract, thereby clamping the bracket position between the movable plate 26 and the fixing plate 27.

[0030] The limiting device 7 includes a fixed cylinder 72, a limiting frame 71 fixedly connected to the outer wall of the fixed cylinder 72, a slider 73 slidably connected to the inner wall of the limiting frame 71, a limiting strip 74 slidably connected to the outer wall of the slider 73, a rotating shaft 75 rotatably connected to the inner wall of the slider 73, a sliding cylinder 76 fixedly connected to the outer wall of the rotating shaft 75, the inner wall of the sliding cylinder 76 slidably connected to the outer wall of the secondary grip 5, the outer wall of the limiting strip 74 fixedly connected to the outer wall of the limiting frame 71, and the inner wall of the fixed cylinder 72 fixedly connected to the outer wall of the main grip 1.

[0031] The locking device 8 includes a sleeve 81, with an elastic friction plate 82 fixedly connected to the outer wall of the sleeve 81. A rotating ring 83 is rotatably connected to the end of the sleeve 81 away from the elastic friction plate 82. An internally threaded protrusion 84 is provided in the wall of the rotating ring 83. The outer wall of the internally threaded protrusion 84 is threadedly connected to the outer wall of the secondary gripping rod 5 through a connecting thread 9, and the connecting thread 9 is provided in the wall of the secondary gripping rod 5. The outer wall of the secondary gripping rod 5 is slidably connected to the outer wall of the sleeve 81. When the radiation rod 3 enters the lesion position in the uterus, the ends of the main gripping rod 1 and the secondary gripping rod 5 outside the patient's body are brought closer together. Due to the position limitation of the connecting post 21 on the connecting device 2, the radiation ends of the main gripping rod 1 and the secondary gripping rod 5 are moved away from each other, while simultaneously opening the vaginal wall of the patient to prevent the applicator from falling off. At this time, the secondary gripping rod 5 is... The sliding cylinder 76 moves. Since the sliding cylinder 76 is connected to the slider 73 through the rotating shaft 75, the slider 73 moves along the inside of the limiting frame 71 under the limitation of the limiting strip 74 and gradually approaches the fixed cylinder 72. During this process, the medical staff holds the main grip 1 and the secondary grip 5 with both hands respectively. When the position is stable, by rotating the rotating ring 83 on the secondary grip 5, the internal thread protrusion 84 and the connecting thread 9 are forced to interact, thereby pushing the sleeve 81 closer to the slider 73. The elastic friction plate 82 also enters the sliding position of the slider 73. By applying pressure to increase the friction between the slider 73 and the limiting strip 74, the slider 73 is hindered from moving by its own deformation, making it difficult for the slider 73 to move, thereby fixing the position of the main grip 1 and the secondary grip 5.

[0032] Working principle:

[0033] During use, the main grip 1, secondary grip 5, and radiation rod 3 all deliver radiation through their tops. The raised tip of radiation rod 3 enters the uterus through the cervix, while the tops of the main grip 1 and secondary grip 5 are positioned outside and close to the cervix. The visualization device 4 allows the camera 46 on the fixing device 41 to capture images of the patient's internal vaginal structure as radiation rod 3 moves, enabling medical staff to quickly and accurately locate the cervix and accelerate the radiotherapy process. Currently, when using an applicator, it cannot be visualized like a gastroscopy or bronchoscope, leading to repeated applicator insertion. Repeated blind probing at the cervix without reaching the uterine cavity can easily cause patient discomfort and damage to blood vessels, leading to massive bleeding. Furthermore, during the withdrawal of the speculum, the applicator can easily become misaligned with the tumor, resulting in insufficient radiation dose to normal tissues and the tumor area, ultimately causing treatment failure. A visualized applicator avoids these problems, allowing doctors to observe the internal situation in real time and make corresponding adjustments, reducing probing time and making the radiotherapy process more precise. Even if massive bleeding occurs, the bleeding site can be quickly located and treated accordingly.

[0034] A visualization device 4 and a fixing device 41 are used to install the camera 46. Since the camera 46 is an external device, it needs to be stably clamped to maintain stability. Before use, the camera 46 is placed on the connecting block 42 of the fixing block 411. The signal cable of the camera 46 is pulled out and inserted into the mounting slot 414. Since the signal cable is mostly flat and has a certain degree of elasticity, it can be placed between the anti-detachment protrusion 415 and the mounting slot 414. The anti-detachment protrusion 415 prevents the signal cable from falling off. The output end of the signal cable is through the through hole 23, near the part of the main grip 1 and the secondary grip 5 that does not enter the patient's body, making it convenient for medical staff to connect to the corresponding electronic device's active image signal. Next, the camera 46 is installed on the connecting block 42, and then the arc-shaped block 43 is placed on top. Due to the attraction of the magnetic ring 45 inside the arc-shaped block 43, the arc-shaped block 43 is attracted to the steel connecting block 42 for initial positioning. Then, the arc-shaped block 43 and the connecting block 42 can be further fixed by screwing bolts into the internal threaded column 44, thereby fixing the position of the camera 46. Since the camera 46 is detachable, it is easy to disassemble and replace the camera 46, while preventing the connection of the camera 46 from falling into the patient's body, reducing the patient's discomfort. At the same time, the anti-radiation tube 413, the connecting tube 412 and the fixing block 411 protect the signal line and the camera 46, reducing the impact of radiation from the radiation rod 3 on the image signal of the camera 46.

[0035] The limiting device 7 and locking device 8 work together to lock the positions of the main gripping rod 1 and the secondary gripping rod 5. During use, the secondary gripping rod 5 is adjusted to regulate the distance between their tips, with the position of the main gripping rod 1 as the reference. When the radiation rod 3 enters the lesion site in the uterus, the ends of the main gripping rod 1 and the secondary gripping rod 5 located outside the patient's body are brought closer together. Due to the position limitation of the connecting post 21 on the connecting device 2, the radiation tips of the main gripping rod 1 and the secondary gripping rod 5 are moved away from each other, simultaneously opening the vaginal wall to prevent the applicator from falling. At this time, the secondary gripping rod 5 drives the sliding cylinder 76 to move. Since the sliding cylinder 76 is connected to the slider 73 via the rotating shaft 75, the slider 73, limited by the limiting strip 74, moves along the limiting frame 7. 1. The internal movement gradually approaches the fixed cylinder 72. During this process, the medical staff holds the main grip 1 and the secondary grip 5 with both hands respectively. When the position is stable, the rotating ring 83 on the secondary grip 5 is rotated to force the internal threaded protrusion 84 and the connecting thread 9 to interact, thereby pushing the sleeve 81 closer to the slider 73. The elastic friction plate 82 also enters the sliding position of the slider 73. By applying pressure, the friction between the slider 73 and the limiting strip 74 is increased, and the slider 73 is hindered by its own deformation, making it difficult for the slider 73 to move. This fixes the position of the main grip 1 and the secondary grip 5. When the position is stable, the main grip 1 and the secondary grip 5 are further clamped by rotating the clamping block 6.

[0036] Since the radiation rod 3 connected through the connection hole 22 is far from the top, the main grip rod 1 and the secondary grip rod 5 are set to clamp the visualization device 4 and the radiation rod 3, reducing the vibration at the top of the radiation rod 3, reducing the patient's discomfort, and making the image acquired by the camera 46 clearer.

[0037] The connecting device 2 allows the applicator to be placed on the hospital bed and the support. Pulling the movable plate 26 downward causes the connecting bridge 25 to move downward simultaneously, thereby stretching the telescopic rod 24 with the connecting column 21. The telescopic rod 24 has a tensile effect and is in a contracted state when not under force. At this time, the telescopic rod 24 is stretched, creating a gap between the movable plate 26 and the fixed plate 27. After the support is passed through this gap, the tension of the movable plate 26 is released, causing the telescopic rod 24 to retract, thereby allowing the movable plate 26 and the fixed plate 27 to clamp the position of the support. Through the effect of dispersing force, the force on the vaginal wall of the patient is reduced, thereby alleviating the pain suffered by the patient during radiotherapy.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A visual brachytherapy applicator for cervical cancer, characterized in that, include: Main grip (1); The connecting device (2) is rotatably connected to the middle part of the outer wall of the main grip (1); Radiation rod (3), the outer wall of which is fixedly connected to the inner wall of connecting device (2); A visualization device (4) is fixedly connected to the outer wall of the radiation rod (3); Secondary grip (5), the bottom of the bottom connecting device (2) of the secondary grip (5) is rotatably connected; Limiting device (7), the inner wall of the limiting device (7) is fixedly connected to the outer wall of the main grip (1); Locking device (8), the outer wall of the locking device (8) is slidably connected to the outer wall of the secondary grip (5); The visualization device (4) includes a fixing device (41), a connecting block (42) is fixedly connected to the top of the fixing device (41), an arc-shaped block (43) is slidably connected to the outer wall of the connecting block (42), an internally threaded column (44) is fixedly connected to the inner wall of the arc-shaped block (43), the inner wall of the arc-shaped block (43) is fixedly connected to the outer wall of the magnetic ring (45), and a camera (46) is slidably connected to the inner wall of the arc-shaped block (43). The fixing device (41) includes a fixing block (411), a connecting cylinder (412) is fixedly connected to the outer wall of the fixing block (411), an anti-radiation tube (413) is fixedly connected to one end of the connecting cylinder (412) away from the fixing block (411), an installation groove (414) is fixedly connected to the top of the anti-radiation tube (413), and an anti-detachment protrusion (415) is fixedly connected to the side wall of the installation groove (414).

2. The visual cervical cancer brachytherapy applicator according to claim 1, characterized in that: The connecting block (42) is fixedly connected to the outer wall of the internal threaded column (44) by bolts, and the outer wall of the magnetic ring (45) is slidably connected to the outer wall of the connecting block (42).

3. The visual cervical cancer brachytherapy applicator according to claim 2, characterized in that: The outer wall of the camera (46) is slidably connected to the outer wall of the mounting groove (414) via a signal line. The outer wall of the camera (46) is slidably connected to the outer wall of the fixing block (411). The inner wall of the fixing block (411) is fixedly connected to the outer wall of the radiation rod (3). The inner wall of the connecting cylinder (412) and the inner wall of the anti-radiation tube (413) are both fixedly connected to the outer wall of the radiation rod (3).

4. The visual cervical cancer brachytherapy applicator according to claim 3, characterized in that: The connecting device (2) includes a connecting column (21). The inner wall of the connecting column (21) is fixedly connected to the outer wall of the radial rod (3) through a connecting hole (22), and the connecting hole (22) is opened in the wall of the connecting column (21). The inner wall of the connecting column (21) is fixedly connected to the outer wall of the mounting groove (414) through a through hole (23), and the through hole (23) is opened in the wall of the connecting column (21). A telescopic rod (24) is fixedly connected to the outer wall of the connecting column (21). A connecting bridge (25) is fixedly connected to the bottom of the telescopic rod (24). A movable plate (26) is fixedly connected to the bottom of the connecting bridge (25). A fixed plate (27) is fixedly connected to the bottom of the connecting column (21).

5. The visual cervical cancer brachytherapy applicator according to claim 4, characterized in that: The outer wall of the top of the connecting column (21) is threaded with a clamping block (6), and the inner wall of the fixing plate (27) and the side wall of the connecting column (21) are slidably connected to the outer wall of the connecting bridge (25).

6. The visual cervical cancer brachytherapy applicator according to claim 1, characterized in that: The limiting device (7) includes a fixed cylinder (72), a limiting frame (71) is fixedly connected to the outer wall of the fixed cylinder (72), a slider (73) is slidably connected to the inner wall of the limiting frame (71), a limiting strip (74) is slidably connected to the outer wall of the slider (73), a rotating shaft (75) is rotatably connected to the inner wall of the slider (73), and a sliding cylinder (76) is fixedly connected to the outer wall of the rotating shaft (75).

7. The visual cervical cancer brachytherapy applicator according to claim 6, characterized in that: The inner wall of the sliding cylinder (76) is slidably connected to the outer wall of the secondary grip (5), the outer wall of the limiting strip (74) is fixedly connected to the outer wall of the limiting frame (71), and the inner wall of the fixed cylinder (72) is fixedly connected to the outer wall of the main grip (1).

8. The visual cervical cancer brachytherapy applicator according to claim 1, characterized in that: The locking device (8) includes a sleeve (81), an elastic friction plate (82) is fixedly connected to the outer wall of the sleeve (81), and a rotating ring (83) is rotatably connected to one end of the sleeve (81) away from the elastic friction plate (82), and an internal threaded protrusion (84) is provided in the wall of the rotating ring (83).

9. A visual cervical cancer brachytherapy applicator according to claim 8, characterized in that: The outer wall of the internal threaded protrusion (84) is threadedly connected to the outer wall of the secondary grip (5) through the connecting thread (9), and the connecting thread (9) is opened in the wall of the secondary grip (5). The outer wall of the secondary grip (5) is slidably connected to the outer wall of the sleeve (81).

Images