Cervical source applicator with locking function

Abstract

The invention relates to the technical field of medical instruments, and discloses a cervical source applicator with a locking function, which comprises a source applicator body, the source applicator body further comprises a rack, a cervical canal with a bent end part and a fornix tube, the bent end of the cervical canal is in threaded connection with a steel tube part, the end part of the steel tube part is provided with a source application end, and the fornix tube is in threaded connection with the source application end. The cervix uteri source applicator with the locking function comprises a source application end and a cervical canal, a rolling ball part is installed in the source application end, a driving sleeve is installed in the cervical canal, a hose is arranged at the bent end of the cervical canal, a rotating sleeve is installed in the steel pipe part, and a silica gel shaft is arranged in the source application end. The angle of the rolling ball part is changed so that the irradiation range of the radioactive source located in the rolling ball part can be adjusted, the silica gel shaft is utilized to enable the rolling ball part to conduct corresponding angle adjustment, and therefore the irradiation range of the radioactive source can be adjusted. And the condition of non-uniform irradiation or damage to surrounding normal tissues is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a cervical applicator with locking function. BACKGROUND

[0002] Cervical cancer is a gynecological malignant tumor with high incidence, and intracavitary afterloading therapy is one of the main methods for treating cervical cancer. It can also be used alone, and is indispensable for patients with advanced disease. The conventional afterloading therapy process is as follows: the patient lies in lithotomy position on the gynecological examination bed, the doctor uses the speculum to expose the cervix, inserts the afterloading uterine cavity applicator into the patient's uterus, then places one uterine cavity applicator on each side of the uterine cavity, fixes and packs, performs CT scanning, and obtains an image. The doctor outlines the target area and gives the prescribed dose, the physicist designs the treatment plan, and finally confirms together, connects the applicator in the patient's body to the afterloading therapy machine, implements the treatment plan, and performs source therapy. The applicator for brachytherapy of cervical lesions mainly includes one uterine cavity tube and two vault tubes. During use, the uterine cavity tube is inserted into the uterine cavity through the cervix, and the top ends of the two vault tubes are placed on the horizontal sides of the vaginal vault. The tail ends of the applicator tubes are connected to the afterloading therapy machine through the connecting tube, and the radioactive source reaches the predetermined position and stays for a certain period of time to complete the treatment. By adjusting the residence position and time of the radioactive source in the three tubes, a specific dose distribution can be formed in the cervical and vaginal vault area. Generally speaking, in order to ensure that the lower part of the uterine body (the area of the fundus) and the upper segment of the cervical canal obtain sufficient treatment dose, the radioactive source is placed at the top end of the uterine cavity tube, which means that the radioactive source is in close contact with the endometrium of the fundus. However, in actual use, the uterine cavity tube may cause mechanical extrusion to the tissue in the uterine cavity when it is inserted into the patient's uterus. This extrusion may cause the displacement of the lesion (such as tumor, polyp, etc.) originally located at a certain position, which may affect the accuracy of radiotherapy. If the displacement is large, an interpolation needle may be needed for treatment, which increases the operation steps and may cause damage to the surrounding normal tissue, thereby causing complications. Therefore, we propose a cervical applicator with locking function. SUMMARY

[0003] The present application aims to provide a cervical applicator with locking function to solve the problems raised in the background art.

[0004] In order to achieve the above object, the present application provides the following technical scheme: a cervical applicator with locking function, comprising an applicator body, the applicator body further comprising a rack, a curved cervical canal and a vault tube, the curved end of the cervical canal is threadedly connected with a steel pipe part, and a source end is installed at the end of the steel pipe part, and a rolling ball part is installed inside the source end and movably connected with the inner wall thereof, a drive sleeve is installed in the cervical canal, a hose is arranged at the curved end of the cervical canal, and a rotating sleeve is rotatably connected with the inner wall of the steel pipe part, cavities are formed in the drive sleeve, the hose, the rotating sleeve and the rolling ball part, a radioactive source enters the rolling ball part through the cavity, and a silica gel shaft in contact with the rolling ball part is arranged inside the source end, a steel sleeve is fixedly installed on the rack, a winding shaft is rotatably connected with the inner wall of the steel sleeve, a metal guide wire is wound on the winding shaft, one end of the metal guide wire is located in the steel pipe part, and the metal guide wire and the silica gel shaft are connected through a connecting unit.

[0005] Preferably, the connecting unit comprises a plastic sleeve arranged inside the source end, a fixed shaft body is fixedly installed on the inner wall of the end of the source end, the plastic sleeve is limitedly slid on the fixed shaft body, the silica gel shaft is sleeved on the plastic sleeve, the end of the plastic sleeve is further fixedly installed with a connecting shaft body, the connecting shaft body extends through the inner wall of the source end and into the steel pipe part, a spring located inside the source end is sleeved on the connecting shaft body, one end of the spring is connected with the inner wall of the source end, and the other end of the spring is in contact with the plastic sleeve.

[0006] Preferably, a hollow sleeve rotatably connected with the inner wall of the steel pipe part is further installed inside the steel pipe part, a circular disc rack is further fixedly installed on the hollow sleeve, guide sleeves are symmetrically installed on the circular disc rack, a transmission panel is arranged above the circular disc rack, guide shaft bodies slidably connected with the inner walls of the guide sleeves are symmetrically installed on the transmission panel, the metal guide wire is located between the connecting shaft body and the transmission panel, and the connecting shaft body and the transmission panel are connected through a nut.

[0007] Preferably, a fixed sleeve is further fixedly installed on the steel sleeve, a drive shaft body limitedly and slidably connected with the inner wall of the end of the winding shaft is installed on the end of the winding shaft, one end of the drive shaft body sequentially penetrates the steel sleeve and the fixed sleeve and extends to the outside of the fixed sleeve, a knob is fixedly installed on the end of the drive shaft body, and a scale groove is formed in the steel sleeve.

[0008] Preferably, an annular panel is fixedly installed on the drive shaft body, a plurality of telescopic shaft bodies are further fixedly installed on the annular panel, and a steel ball is embedded in the end of each telescopic shaft body.

[0009] Preferably, a plurality of arc-shaped protrusions are fixedly installed on the inner wall of the fixing sleeve, one side of the arc-shaped protrusions is an inclined surface and the other side is a right-angle surface, the inclined surface of each arc-shaped protrusion is arc-shaped, and the arc-shaped protrusions are located on the movement track of the telescopic shaft body.

[0010] Preferably, a plurality of first rolling balls are installed on the outer wall of the rotating sleeve, and a plurality of second rolling balls are installed on the outer wall of the circular disc holder, and the second rolling balls are located on the movement track of the first rolling balls.

[0011] Preferably, a plurality of plug-in shaft bodies are installed at both ends of the hose, cavities corresponding to the plug-in shaft bodies are formed in the end portions of the driving sleeve and the rotating sleeve, and the plug-in shaft bodies are inserted into the cavities.

[0012] Preferably, a plurality of guide rings are installed on the curved end of the cervical canal, and the guide rings are used to limit the rotation of the hose.

[0013] Preferably, an iron disc holder is slidably connected to the outer wall of the driving sleeve, and a magnet is fixedly installed on the end portion of the cervical canal, and the magnet generates an attractive force on the iron disc holder.

[0014] Compared with the prior art, the present application has the following advantages: The present application adjusts the irradiation range of the radioactive source located in the inside of the rolling ball part by changing the angle of the rolling ball part, adjusts the angle of the rolling ball part by using the silica gel shaft, and makes the transmission panel drive the plastic sleeve to move directionally by the connecting shaft body under the pulling of the metal guide wire, so that the spring in the compressed state is continuously extruded, and the angle of the rolling ball part is adjusted by using the friction force during the movement of the silica gel shaft with the plastic sleeve, so that the telescopic shaft body moves away from the corresponding position of the arc-shaped protrusion, and the silica gel shaft moves reversely under the action of the spring in the compressed state, so that the rolling ball part adjusts the angle in the opposite direction, so that the irradiation range of the radioactive source is adjusted. The structure design of the present application ensures that the radioactive source can irradiate the deviated lesion, avoids the uneven irradiation, and avoids the damage to the surrounding normal tissue. The present application drives the hose to rotate by rotating the driving sleeve, so that the second rolling balls on the circular disc holder are subjected to the force under the action of the first rolling balls, the transmission panel drives the connecting shaft body to rotate through the guide sleeve and the guide shaft body, the plastic sleeve drives the silica gel shaft to rotate, the angle of the rolling ball part is changed by using the friction force, so that the radioactive source has a wider angle adjustment range, so as to adapt to the irradiation treatment of the deviated lesion, and improve the treatment effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application. Figure 2 The schematic diagram of the cervical canal structure of the application; Figure 3 The schematic diagram of the steel pipe part and the source application end structure separation of the application; Figure 4 The schematic diagram of the steel pipe part and the source application end internal structure of the application; Figure 5 The schematic diagram of the source application end structure of the application; Figure 6 The schematic diagram of the source application end internal structure and the steel pipe part internal structure separation of the application; Figure 7 The schematic diagram of the flexible tube and the driving sleeve structure separation of the application; Figure 8 The schematic diagram of the magnet and the iron disc holder structure of the application; Figure 9 The schematic diagram of the steel sleeve internal structure of the application; Figure 10 The schematic diagram of the winding shaft and the driving shaft body structure separation of the application; Figure 11 The schematic diagram of the telescopic shaft body and the arc-shaped protrusion structure of the application.

[0016] In the figure: 1, source applicator body; 2, holder; 3, cervical canal; 31, guide ring; 32, magnet; 4, dome pipe; 5, steel pipe part; 6, source application end; 7, rolling ball part; 8, driving sleeve; 81, iron disc holder; 9, flexible tube; 91, plug-in shaft body; 10, rotating sleeve; 101, ball one; 11, cavity; 12, radioactive source; 13, silica gel shaft; 14, steel sleeve; 141, winding shaft; 142, metal guide wire; 143, fixed sleeve; 144, driving shaft body; 145, knob; 146, scale groove; 147, annular panel; 148, telescopic shaft body; 149, arc-shaped protrusion; 15, connecting unit; 151, plastic sleeve; 152, fixed shaft body; 153, connecting shaft body; 154, spring; 155, hollow sleeve; 156, circular disc holder; 1561, ball two; 157, guide sleeve; 158, transmission panel; 159, guide shaft body; 150, nut; 16, chamber. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0018] Please refer to Figures 1-11The application provides a technical scheme: a cervical applicator with a locking function Figure 1 and the accompanying drawings Figure 2 As shown in the accompanying drawings, the cervical applicator comprises an applicator body 1, which further comprises a rack 2, a curved cervical canal 3 and a fornix canal 4. The curved end of the cervical canal 3 is threadedly connected with a steel pipe part 5, and an applicator end 6 is installed at the end of the steel pipe part 5. The applicator end 6 is internally provided with a rolling ball part 7 which is movably connected with the inner wall of the applicator end 6. As shown in the accompanying drawings Figure 3 - the accompanying drawings Figure 5 During specific installation, the applicator end is inserted into the steel pipe part 5, and then a threaded part (which can be a nut 150, a threaded sleeve or the like) is used to fix the applicator end on the steel pipe part 5. The bottom of the applicator end can be disassembled, and the bottom is fixed with the applicator end itself by using a screw. A driving sleeve 8 is installed in the cervical canal 3, and the driving sleeve 8 can rotate in the cervical canal 3. A hose 9 is arranged at the curved end of the cervical canal 3. A plurality of guide rings 31 are arranged at the curved end of the cervical canal 3, and the guide rings 31 are used to limit the rotation of the hose 9. During rotation of the hose 9, the guide rings 31 can effectively limit the rotation of the hose 9. A rotating sleeve 10 is internally arranged in the steel pipe part 5 and movably connected with the inner wall of the steel pipe part 5. Cavities 11 are formed in the driving sleeve 8, the hose 9, the rotating sleeve 10 and the rolling ball part 7. A radioactive source 12 enters the rolling ball part 7 through the cavities 11. When the radioactive source 12 is located in the rolling ball part 7, the orientation angle of the cavity 11 of the rolling ball part 7 is changed, so that the radioactive source 12 located in the rolling ball part 7 is synchronously adjusted. It should be noted that, during specific physiotherapy, platinum-iridium alloy developing points (with a diameter of 0.5-1 mm) can be symmetrically embedded in the surface of the rolling ball part 7. The high-density developing characteristics of CT images are used to realize angle recognition. Alternatively, an asymmetric coding groove is engraved on the rolling ball part 7, the groove is filled with a barium sulfate coating (with a CT value of about 2000HU), and the groove coding sequence is determined by CT tomographic scanning. A silica gel shaft 13 is arranged in the applicator end 6 and in contact with the rolling ball part 7. A steel sleeve 14 is fixedly installed on the rack 2, and a wire winding shaft 141 is movably arranged in the steel sleeve 14. A metal guide wire 142 is wound on the wire winding shaft 141, and one end of the metal guide wire 142 is located in the steel pipe part 5. The metal guide wire 142 and the silica gel shaft 13 are connected by a connecting unit 15.

[0019] Furthermore, a fixed sleeve 143 is fixedly mounted on the steel sleeve 14, and a driving shaft 144 is mounted on the end of the winding shaft 141 and is limitedly slidably connected to the inner wall thereof. One end of the driving shaft 144 passes through the steel sleeve 14 and the fixed sleeve 143 in sequence and extends to the outside of the fixed sleeve 143, wherein a knob 145 is fixedly mounted on the end of the driving shaft 144, and a scale groove 146 is opened on the steel sleeve 14, and a pointer is mounted on the knob 145. Since the pointer is a prior art component, the present invention does not There is no excessive description of it, and an annular panel 147 is fixedly mounted on the driving shaft 144, and a plurality of telescopic shafts 148 are also fixedly mounted on the annular panel 147, and a steel ball is embedded in the end of each telescopic shaft 148, and a plurality of arc-shaped protrusions 149 are fixedly mounted on the inner wall of the fixed sleeve 143, one side of the arc-shaped protrusion 149 is an inclined surface and the other side is a right-angled surface, and the inclined surface of each arc-shaped protrusion 149 is an arc shape, wherein the arc-shaped protrusion 149 is located on the motion trajectory of the telescopic shaft 148, combined with the attached Figure 11 As shown, when the knob 145 rotates clockwise, the driving shaft 144 will drive the annular panel 147 and multiple telescopic shafts 148 thereon to rotate clockwise. At this time, the telescopic shaft 148 will move along the inclined surface of the arc-shaped protrusion 149, that is, the telescopic shaft 148 will shrink, and the driving shaft 144 will rotate clockwise. Then, the winding shaft 141 slidably connected thereto will pull the metal guide wire 142, and under the action of the connecting unit 15, the silicone shaft 13 will move, and the friction force will cause the ball part 7 to adjust its angle, thereby changing the irradiation angle of the radiation source 12.

[0020] Furthermore, as a further limitation in the present invention, the connecting unit 15 includes a plastic sleeve 151 arranged inside the source end 6, and a fixed shaft 152 fixedly installed on the inner wall of the end of the source end 6, the plastic sleeve 151 slides on the fixed shaft 152 to the upper limit, and the silicone shaft 13 is sleeved on the plastic sleeve 151, wherein the end of the plastic sleeve 151 is also fixedly installed with a connecting shaft 153, and the end of the connecting shaft 153 passes through the inner wall of the source end 6 and extends to the inside of the steel pipe part 5, and a spring 154 located inside the source end 6 is sleeved on the connecting shaft 153, and one end of the spring 154 is connected to the inner wall of the source end 6, and the other end of the spring 154 is in contact with the plastic sleeve 151; combined with the attached Figure 5 and attached Figure 6 As shown, the bottom of the source portion of the present invention is detachable and can be fixed by screws during installation. Figure 6To explain, the bottom of the application source is fixedly installed with a spring 154. During the assembly of the application source, first, the plastic sleeve 151 with the silica gel shaft 13 is sleeved on the fixed shaft body 152, then the bottom of the application source is installed, and is fixed by screws. During the installation of the bottom of the application source, the connecting shaft body 153 at the bottom of the plastic sleeve 151 will pass through the spring 154 and extend to the outside of the application source. During the installation process, the user needs to fix the rolling ball part 7 by hand, so that the silica gel shaft 13 has a slight deformation. At this time, the application source is integrated.

[0021] Further, a hollow sleeve 155 is also installed inside the steel pipe part 5 and is rotationally connected with the inner wall of the steel pipe part 5, wherein a circular disc holder 156 is also fixedly installed on the hollow sleeve 155, and guide sleeves 157 are also symmetrically installed on the circular disc holder 156, and a transmission panel 158 is arranged above the circular disc holder 156, and guide shaft bodies 159 that are in sliding connection with the inner walls of the guide sleeves 157 are symmetrically installed on the transmission panel 158, the metal guide wire 142 is located between the connecting shaft body 153 and the transmission panel 158, and the connecting shaft body 153 and the transmission panel 158 are connected through the nut 150, and then in the specific installation process, one end of the metal guide wire 142 is deeply inserted between the connecting shaft body 153 and the transmission panel 158, and then the connecting shaft body 153 and the transmission panel 158 are fixed by using the nut 150, and after the fixing is completed, the metal guide wire 142 needs to be pulled, so that the transmission panel 158 drives the plastic sleeve 151 to move directionally through the connecting shaft body 153, so as to extrude the spring 154, and at this time the silica gel shaft 13 will act on the rolling ball part 7, at this time the rolling ball part 7 can be fixed, so that the axis of the rolling ball part 7 coincides with the axis of the source part, the silica gel shaft 13 will be deformed, and the plastic sleeve 151 will extrude the spring 154, and the pulling of the metal guide wire 142 relies on the rotation of the knob 145 by the user, when the knob 145 is rotated clockwise, the driving shaft body 144 drives the annular panel 147 and the plurality of telescopic shaft bodies 148 thereon to rotate clockwise, at this time the telescopic shaft bodies 148 move along the inclined surface of the arc-shaped protrusion 149, that is, the telescopic shaft bodies 148 are retracted, the driving shaft body 144 is rotated clockwise, and then the wire spool 141 that is in sliding connection with the driving shaft body 144 pulls the metal guide wire 142, so that the silica gel shaft 13 in the above can be rotated, if the knob 145 is counterclockwise rotated, the telescopic shaft bodies 148 will be hindered by the right-angle surface of the arc-shaped protrusion 149, so that the plastic sleeve 151 extrudes the spring 154 in the initial state, the initial state refers to that the axis of the rolling ball part 7 coincides with the axis of the source part, when the knob 145 is pulled outward, that is, the driving shaft body 144 drives the telescopic shaft bodies 148 to move away from the corresponding position of the arc-shaped protrusion 149 through the annular panel 147, at this time the telescopic shaft bodies 148 do not contact the arc-shaped protrusion 149 when they rotate with the annular panel 147, then under the action of the spring 154 in the compressed state, the silica gel shaft 13 can move reversely, so that the rolling ball part 7 can be adjusted in the reverse angle, that is, the metal guide wire 142 is pulled to make the silica gel shaft 13 move directionally, and the angle adjustment of the rolling ball part 7 is controlled by using the friction force as the positive angle adjustment, then the silica gel shaft 13 moves reversely under the action of the spring 154, and the angle adjustment of the rolling ball part 7 is controlled by using the friction force as the reverse angle adjustment; In order to make the radioactive source 12 have a wider range of angle adjustment, the present application also designs that a plurality of plug-in shafts 91 are installed at both ends of the hose 9, and the end of the driving sleeve 8 and the rotating sleeve 10 are provided with cavities 16 corresponding to the plug-in shafts 91, and the plug-in shafts 91 are inserted into the cavities 16. As mentioned above, the guide ring 31 can effectively limit the rotation of the hose 9, and in actual application, one end of the driving sleeve 8 is located outside the cervical canal 3, and rotating the driving sleeve 8 can make the hose 9 drive the rotating sleeve 10 at the other end to rotate under the action of the plug-in shafts 91 and the cavities 16. A plurality of balls 101 are installed on the outer wall of the rotating sleeve 10, and a plurality of balls 1561 are installed on the outer wall of the circular disc holder 156, and the balls 1561 are located on the movement track of the balls 101, so that when the rotating sleeve 10 rotates, the balls 101 on it will exert force on the balls 1561 during rotation, thereby making the balls 1561 drive the circular disc holder 156 to rotate, and under the action of the circular disc holder 156, the hollow sleeve 155 rotates directionally inside the steel pipe 5. The circular disc holder 156 also drives the transmission panel 158 to drive the connecting shaft 153 to rotate through the guide sleeve 157 and the guide shaft 159, and the plastic sleeve 151 drives the silica gel shaft 13 to rotate, thereby changing the angle of the rolling ball part 7 by using friction, so that the axis of the rolling ball part 7 is no longer coincident with the axis of the source end 6. The above angle adjustment can only adjust a certain range, which can be set according to the actual application of medical personnel. The driving sleeve 8 is also provided with an iron disc holder 81 in sliding connection with the outer wall thereof, and a magnet 32 is fixedly installed at the end of the cervical canal 3. The magnet 32 generates an attractive force on the iron disc holder 81. When the driving sleeve 8 needs to be rotated, the iron disc holder 81 is pulled away from the magnet 32, and then the iron disc holder 81 is rotated. When the cervical canal 3 enters the patient's uterine cavity 16, the surface of the rolling ball part 7 is provided with a developing point, so that medical personnel can observe the angle adjustment range of the rolling ball part 7 by using CT, and determine the irradiation range of the radioactive source 12 before performing radiotherapy.

[0022] Specifically, in actual use, if the cervical canal 3 is offset due to lesions when it is inserted into the patient's uterine cavity 16, the medical personnel can adjust the angle of the rolling ball part 7 to adjust the irradiation range of the radioactive source 12. It should be noted that no radiotherapy is performed during the adjustment. Since the surface of the rolling ball part 7 is provided with a developing point, medical personnel can observe the angle of the rolling ball part 7 in real time through CT imaging. The angle adjustment of the rolling ball part 7 can be performed as follows: Operation scheme one, combined with the Figure 11As shown, the medical staff can directly rotate the knob 145 clockwise, the knob 145 drives the annular panel 147 and the telescopic shaft body 148 thereon to rotate clockwise through the driving shaft body 144, at this time the telescopic shaft body 148 will move along the inclined surface of the arc-shaped protrusion 149, that is, the telescopic shaft body 148 is retracted, the driving shaft body 144 rotates clockwise, then the wire spool 141 connected with it through sliding will pull the metal guide wire 142, under the action of the metal guide wire 142, the transmission panel 158 makes the plastic sleeve 151 directional movement through the connecting shaft body 153, so as to continue to extrude the compressed spring 154, and the silica gel shaft 13 on the plastic sleeve 151 will act on the ball part 7, so as to change the angle of the ball part 7, and then the radiation angle of the radiation source 12 is also changed accordingly, and the medical staff determines the radiation angle of the radiation source 12 in real time through the CT image; Operation scheme two, combined with Figure 9 and attached Figure 10 As shown, the medical staff can pull the knob 145 to drive the annular panel 147 and the plurality of telescopic shaft bodies 148 thereon to move synchronously through the driving shaft body 144, when the plurality of telescopic shaft bodies 148 leave the corresponding positions of the arc-shaped protrusion 149, at this time the telescopic shaft body 148 will not contact with the arc-shaped protrusion 149 when rotating with the annular panel 147, at this time the medical staff can rotate the knob 145 counterclockwise, under the action of the spring 154 in the compressed state, the silica gel shaft 13 can move reversely, so that the angle adjustment direction of the ball part 7 is opposite to that of the operation scheme one under the action of friction, and then the radiation angle of the radiation source 12 is also changed accordingly, and the medical staff determines the radiation angle of the radiation source 12 in real time through the CT image; Operation scheme three, combined with Figure 3 , attached Figure 4 , attached Figure 7 and attached Figure 8As shown, on the basis of operation scheme one or operation scheme two, the following adjustment can also be carried out: pull the iron disc holder 81 away from the magnet 32, then rotate the iron disc holder 81 to drive the sleeve 8 to rotate in a certain direction (clockwise or counterclockwise, which needs to be determined according to the actual situation), the sleeve 8 rotates in a certain direction to drive the hose 9 to rotate the rotating sleeve 10 at the other end under the action of the plug-in shaft 91 and the chamber 16, when the rotating sleeve 10 rotates, the ball one 101 on the rotating sleeve 10 will exert force on the ball two 1561 during rotation, so that the ball two 1561 drives the circular disc holder 156 to rotate, under the action of the circular disc holder 156, the hollow sleeve 155 rotates in a certain direction inside the steel pipe 5, and the circular disc holder 156 also drives the transmission panel 158 to rotate the connecting shaft 153 through the guide sleeve 157 and the guide shaft 159, and then the plastic sleeve 151 drives the silica gel shaft 13 to rotate, so as to change the angle of the rolling ball part 7 by friction, so that the radiation angle of the radioactive source 12 is also changed, and the medical staff determines the radiation angle of the radioactive source 12 in real time through CT image; and then through the structural design of the application, the radiation range can be adjusted after the patient's lesion position deviates, so as to improve the radiation range.

[0023] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cervical applicator with a locking function, characterized in that: The invention comprises a source applicator body (1), the source applicator body (1) further comprising a frame (2), a cervical canal (3) with a curved end, and a fornix canal (4), the curved end of the cervical canal (3) being threadedly connected to a steel pipe portion (5), and an applicator end (6) being installed at the end of the steel pipe portion (5), and a ball portion (7) being installed inside the applicator end (6) and being movably connected to the inner wall thereof, a driving sleeve (8) being installed inside the cervical canal (3), and a hose (9) being provided at the curved end of the cervical canal (3), and a rotating sleeve (10) being installed inside the steel pipe portion (5) and being rotatably connected to the inner wall thereof, the driving sleeve (8), the hose (9), and the rotating sleeve A cavity (11) is provided inside the tube (10) and the ball portion (7), and a radiation source (12) enters the ball portion (7) through the cavity (11). A silicone shaft (13) in contact with the ball portion (7) is provided inside the source end (6). A steel sleeve (14) is fixedly mounted on the frame (2), and a winding shaft (141) rotatably connected to the inner wall of the steel sleeve (14) is mounted inside the steel sleeve (14). A metal guide wire (142) is wound around the winding shaft (141), and one end of the metal guide wire (142) is located inside the steel tube portion (5). The metal guide wire (142) and the silicone shaft (13) are connected via a connecting unit (15).

2. The cervical applicator with a locking function according to claim 1, characterized in that: The connecting unit (15) includes a plastic sleeve (151) arranged inside the application source end (6), and a fixed shaft (152) fixedly installed on the inner wall of the end of the application source end (6), the plastic sleeve (151) slides on the fixed shaft (152), and the silicone shaft (13) is sleeved on the plastic sleeve (151), wherein the end of the plastic sleeve (151) is also fixedly installed with a connecting shaft (153), and the end of the connecting shaft (153) passes through the inner wall of the application source end (6) and extends to the inside of the steel pipe part (5), and the connecting shaft (154) located inside the application source end (6) is sleeved on the connecting shaft (153), and one end of the spring (154) is connected to the inner wall of the application source end (6), and the other end of the spring (154) is in contact with the plastic sleeve (151).

3. The cervical applicator with a locking function according to claim 2, characterized in that: A hollow sleeve (155) rotatably connected to the inner wall of the steel pipe portion (5) is also installed inside the hollow sleeve (155), wherein a circular disc rack (156) is fixedly installed on the hollow sleeve (155), and a guide sleeve (157) is symmetrically installed on the circular disc rack (156), and a transmission panel (158) is provided above the circular disc rack (156), and a guide shaft (159) slidably connected to the inner wall of the guide sleeve (157) is symmetrically installed on the transmission panel (158), the metal guide wire (142) is located between the connecting shaft (153) and the transmission panel (158), and the connecting shaft (153) and the transmission panel (158) are connected by a nut (150).

4. The cervical applicator with a locking function according to claim 3, characterized in that: A fixed sleeve (143) is also fixedly mounted on the steel sleeve (14), and a driving shaft (144) is mounted on the end of the winding shaft (141) and is limitedly slidably connected to the inner wall thereof, one end of the driving shaft (144) passes through the steel sleeve (14) and the fixed sleeve (143) in sequence and extends to the outside of the fixed sleeve (143), wherein a knob (145) is fixedly mounted on the end of the driving shaft (144), and a scale groove (146) is opened on the steel sleeve (14).

5. The cervical applicator with a locking function according to claim 4, characterized in that: An annular panel (147) is fixedly mounted on the driving shaft (144), and a plurality of telescopic shafts (148) are also fixedly mounted on the annular panel (147), with a steel ball embedded at the end of each telescopic shaft (148).

6. The cervical applicator with locking function according to claim 5, characterized in that: A plurality of arc-shaped protrusions (149) are fixedly mounted on the inner wall of the fixed sleeve (143), wherein one side of the arc-shaped protrusion (149) is an inclined surface and the other side is a right-angled surface, and the inclined surface of each arc-shaped protrusion (149) is in an arc shape, wherein the arc-shaped protrusion (149) is located on the motion trajectory of the telescopic shaft (148).

7. The cervical applicator with a locking function according to claim 3, characterized in that: A plurality of first balls (101) are mounted on the outer wall of the rotating sleeve (10), and a plurality of second balls (1561) are mounted on the outer wall of the circular disc rack (156), and the second balls (1561) are located on the motion trajectory of the first balls (101).

8. The cervical applicator with locking function according to claim 7, characterized in that: A plurality of insertable shafts (91) are installed at both ends of the hose (9), and cavities (16) corresponding to the insertable shafts (91) are opened at the ends of the drive sleeve (8) and the rotating sleeve (10), and the insertable shafts (91) are inserted deep into the cavities (16).

9. The cervical applicator with locking function according to claim 8, characterized in that: The curved end of the cervical tube (3) is also provided with a plurality of guide rings (31), and the guide rings (31) are used to limit the rotation of the hose (9).

10. The cervical applicator with locking function according to claim 8, characterized in that: The driving sleeve (8) is also provided with an iron disc rack (81) slidably connected to its outer wall, and a magnet (32) is fixedly installed at the end of the cervical canal (3), wherein the magnet (32) generates an attractive force on the iron disc rack (81).

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