Source applicator implanting system

Abstract

The invention provides a source applicator implanting system which comprises a cylindrical shell, a source applicator body, a source applicator body and a source applicator body, a containing cavity is formed in the cylindrical shell, an opening communicated with the containing cavity is formed in the surface of the cylindrical shell, and the length direction of the opening is parallel to the axis direction of the cylindrical shell; the moving assembly is arranged in the containing cavity, one end of the moving assembly is provided with an end cover, and the other end of the moving assembly is provided with an implanting assembly; the moving block is mounted on the moving assembly; and the distance measuring sensor is installed in the inner wall of the containing cavity through a fixing plate, and the distance measuring sensor is used for detecting the moving distance of the moving block. According to the source applicator implanting system, the distance measuring sensor is arranged, the position of the implanted component can be obtained by measuring the moving distance of the moving block, and then the implanting depth can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an applicator implantation system. Background Art

[0002] Interstitial radiotherapy is an important method of close-range radiotherapy for tumors. The packaged radiation source is implanted directly into the patient's tumor site for irradiation by delivering the applicator to the vicinity or inside the tumor. The dose of the radiation source is inversely proportional to the square of the distance, and the dose of the surrounding normal tissues can be effectively controlled while the lesion is irradiated with a high dose.

[0003] The depth of the implant needle is an important parameter of the implant needle position. For the current mainstream clinical technology - manual implantation, the control of the depth mainly depends on the feel of the clinician. For experienced doctors, manual depth control is convenient and fast, but its stability is uncertain.

[0004] Clinically, CT or ultrasound guidance can also be relied upon, but this is time-consuming and laborious. Using CT or ultrasound guidance to implant the needle often requires repeated insertion and removal of the needle, which causes greater damage to the patient and has a higher probability of side effects such as bleeding. In addition, multiple CT scans will cause the patient to receive a higher radiation dose.

[0005] Currently, a large number of inventions and documents have designed the best implantation path through pre-planning to obtain the direction, position and depth of implantation needles. Since the position and direction information is already included in the pre-planned implantation guide plate, implantation can be smoothly performed along the channel in the guide plate, but the depth information needs to be manually measured by the doctor using a ruler, and the depth position is fixed with a screwdriver before implantation. The whole process is time-consuming and laborious.

[0006] Therefore, the technical problem that the present application needs to solve is: how to accurately control the implantation depth of the applicator. Summary of the invention

[0007] In order to solve the above technical problems, the present invention proposes a source applicator implantation system, which is provided with a distance measuring sensor. By measuring the moving distance of the moving block, the position of the implant component can be obtained, and the implantation depth can be accurately controlled.

[0008] Specifically, the present invention provides an applicator implantation system, comprising:

[0009] A cylindrical shell, wherein the cylindrical shell has a containing chamber, and a surface of the cylindrical shell is provided with an opening penetrating the containing chamber, wherein a length direction of the opening is parallel to an axial direction of the cylindrical shell;

[0010] A moving component, the moving component is arranged in the accommodating chamber, an end cap is installed at one end of the moving component, and an implanting component is installed at the other end of the moving component;

[0011] A moving block, the moving block being mounted on the moving assembly;

[0012] A distance measuring sensor is installed in the inner wall of the accommodating chamber through a fixing plate, and the distance measuring sensor is used to detect the moving distance of the moving block.

[0013] Preferably, it further comprises a control system, wherein the control system is electrically connected or signal-connected to the distance measuring sensor; and an inner cavity for installing the control system is provided in the end cover.

[0014] Preferably, the moving component comprises:

[0015] A moving rod, the moving rod comprising a smooth rod section and a threaded rod section, the smooth rod section being mounted in a mounting opening of the moving block via a first bearing, the lower end of the moving block being provided with a sliding protrusion, the sliding protrusion being slidably disposed in an opening on the surface of the cylinder shell;

[0016] A support block, the support block is installed in the inner wall of the cylinder shell by bolts, and the support block is provided with a threaded hole for installing the threaded rod segment;

[0017] The end cap is fixed to one end of the bare rod segment away from the threaded rod segment, and the end of the threaded rod segment away from the bare rod segment has a cylindrical portion, the diameter of the cylindrical portion is smaller than the diameter of the threaded rod, and the cylindrical portion is connected to the implant component via a rotating connection device.

[0018] Preferably, one end of the rotating connecting device has a bearing mounting opening, a second bearing is installed in the bearing mounting opening, the cylindrical portion is installed in the inner ring of the second bearing, the other end of the rotating connecting device is used to install the implant component, and an extension portion is fixed to the lower end of the rotating connecting device, and the extension portion is slidably arranged in the opening on the surface of the barrel shell.

[0019] Preferably, a display screen is installed on the end cover.

[0020] Preferably, the implant assembly comprises:

[0021] An applicator, the applicator having a plurality of covering sheets;

[0022] A pneumatic switch device, on which the covering sheet is rotatably mounted, and the pneumatic switch is used to simultaneously control the synchronous rotation of a plurality of the covering sheets;

[0023] A connecting pipe, one end of which is connected to the pneumatic switch device, the rotating connecting device has a closed cavity, and the other end of the connecting pipe is connected to the closed cavity of the rotating connecting device;

[0024] An air supply device is used to inflate air into the closed cavity.

[0025] Preferably, the source applicator is an ellipsoidal structure, an implantation needle is arranged inside the source applicator, the covering sheet is a petal-shaped structure, and a plurality of the covering sheets are arranged in a circular array to form an ellipsoidal structure;

[0026] A spacing is left between two adjacent covering sheets to avoid interference between the covering sheets when they rotate.

[0027] Preferably, the source applicator has an opening on one side facing the pneumatic switch device, and a flexible layer is installed at the opening;

[0028] The pneumatic switch device comprises:

[0029] A fixed cylinder, wherein a plurality of hinge seats are provided at the end of the fixed cylinder, a covering sheet is rotatably mounted on each hinge seat, and an inner hole of the fixed cylinder is used to be connected with the connecting pipe;

[0030] The piston cylinder is slidably mounted in the inner hole of the fixed cylinder. A plurality of hinged arms are rotatably mounted on the piston cylinder. A covering sheet is rotatably mounted on one end of each hinged arm away from the piston cylinder.

[0031] Preferably, a positioning block is provided between the piston cylinder and the source applicator, and the positioning block is installed in the inner wall of the fixed cylinder through a fixing rod;

[0032] A return spring is arranged between the positioning block and the piston cylinder.

[0033] Preferably, it also includes a push component, and the push component includes:

[0034] A piston part, wherein the piston part is slidably mounted in the piston cylinder, the side of the piston cylinder facing the connecting pipe is an open structure, and the side of the piston cylinder facing the source applicator is provided with a closing plate;

[0035] A push rod, one end of which is fixed to the piston portion, and the other end of which is slidable through the positioning block and the flexible layer and extends into the covering cavity of the applicator;

[0036] A push plate is located in the covering cavity of the applicator and is fixed on the push rod. An implant needle is installed on the push plate.

[0037] Preferably, a plurality of groups of rotor modules are linearly arranged on the polished rod segment, a stator module is provided on the inner wall of the accommodating chamber, and the stator module drives the polished rod segment to rotate through the rotor module. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0039] Figure 1 is a schematic diagram of the internal structure of the applicator implantation system proposed in this embodiment;

[0040] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0041] Figure 3 yes Figure 1 A schematic diagram of the local enlarged structure at B in the middle;

[0042] Figure 4 Schematic diagram of the position arrangement of the rotor module and the stator module in this embodiment;

[0043] Figure 5 yes Figure 4 Schematic diagram of the structure in the CC direction;

[0044] Figure 6 Schematic diagram of the three-dimensional structure of the cylinder shell in this embodiment;

[0045] Figure 7 is a schematic diagram of the connection relationship between the source applicator and the pneumatic switch device in this embodiment;

[0046] Figure 8 is a top view of the source applicator and the pneumatic switch device in this embodiment;

[0047] Fig. 9 yes Figure 8 Schematic diagram of the structure in the DD direction;

[0048] Fig.10 is a schematic diagram of the internal structure of the source applicator and the pneumatic switch device in this embodiment;

[0049] Fig.11 Schematic diagram of the positional relationship between the fixed rod and the articulated arm in this embodiment.

[0050] The reference numerals in the accompanying drawings are as follows:

[0051] 11-cylinder shell; 12-accommodating chamber; 13-opening; 14-end cover; 15-moving block; 16-distance sensor; 17-guide plate; 18-control system; 19-smooth rod section; 20-threaded rod section; 21-first bearing; 22-sliding convex block; 23-support block; 24-gasket; 25-bolt; 26-cylindrical part; 27-rotating connection device; 28-flexible layer; 29-covering sheet; 30-fixed cylinder; 31-hinged seat; 3 2-connecting pipe; 33-piston cylinder; 34-articulated arm; 35-positioning block; 36-fixing rod; 37-reset spring; 38-piston part; 39-push rod; 40-push plate; 41-solenoid valve; 42-air pump; 43-extension pipe; 44-hose; 45-coating cavity; 46-closing plate; 47-rotor module; 48-stator module; 49-second bearing; 50-display screen; 51-sealed cavity; 52-support seat; 53-implantation needle. DETAILED DESCRIPTION

[0052] The technical solution of the present application is further described below in conjunction with specific embodiments, but the present application is not limited to these embodiments.

[0053] like Figures 1 to 11 As shown, this embodiment provides a source applicator implantation system, comprising:

[0054] A cylindrical shell 11, wherein the cylindrical shell 11 has a receiving chamber 12, and a surface of the cylindrical shell 11 is provided with an opening 13 that penetrates the receiving chamber 12, and a length direction of the opening 13 is parallel to an axial direction of the cylindrical shell 11;

[0055] A mobile component, the mobile component is arranged in the accommodating chamber 12, an end cap 14 is installed at one end of the mobile component, and an implant component is installed at the other end of the mobile component;

[0056] A moving block 15, the moving block 15 is mounted on the moving assembly;

[0057] The distance measuring sensor 16 is installed in the inner wall of the accommodating chamber 12 through a fixing plate. The distance measuring sensor 16 is used to detect the moving distance of the moving block 15 .

[0058] The technical effect of this solution is that a distance measuring sensor 16 is provided to measure the moving distance of the moving block 15 so as to obtain the position of the implant component and thus accurately control the implantation depth.

[0059] Furthermore, it also includes a guide plate 17, on which a guide opening is provided for limiting the movement direction of the implant component.

[0060] The two ends of the cylindrical shell 11 have through-opening structures respectively. The through-opening structure on one side is used to provide an escape passage for the movement of the moving component, and the through-opening structure on the other side is used to provide an escape passage for the movement of the implanted component.

[0061] Furthermore, the cylindrical shell 11 is supported by a support seat 52. The support seat 52 has an escape opening for leaving space at the bottom end of the cylindrical shell 11.

[0062] As an implementation mode of this embodiment, it also includes a control system 18, and the control system 18 is electrically connected or signal-connected to the distance measuring sensor 16; an inner cavity for installing the control system 18 is provided in the end cover 14.

[0063] The control system 18 in this solution may adopt a controller or a control circuit board, and specifically may adopt a PLC control system or a single-chip microcomputer control system.

[0064] Furthermore, the distance measuring sensor 16 in the present solution may be an ultrasonic distance measuring sensor 16 or a laser distance measuring sensor 16, wherein the ultrasonic distance measuring sensor 16 or the laser distance measuring sensor 16 is prior art, and the working principle thereof may refer to the public materials in the prior art.

[0065] As an implementation of this embodiment, the mobile component includes:

[0066] A moving rod, the moving rod comprises a smooth rod section 19 and a threaded rod section 20, the smooth rod section 19 is installed in the installation opening of the moving block 15 through a first bearing 21, the lower end of the moving block 15 comprises a sliding protrusion 22, and the sliding protrusion 22 is slidably arranged in the opening 13 on the surface of the cylinder shell 11;

[0067] A support block 23 is installed in the inner wall of the cylinder shell 11 by means of bolts 25, and a threaded hole for installing the threaded rod segment 20 is provided on the support block 23; wherein a gasket 24 is installed on the outer surface of the cylinder shell 11, and the bolts 25 pass through the gasket 24 and are threadedly connected to the support block 23; further, the gasket 24 is a curved gasket 24, which is used to fully fit on the surface of the cylinder shell 11.

[0068] An end cap 14 is fixed to one end of the bare rod segment 19 away from the threaded rod segment 20 , and the threaded rod segment 20 has a cylindrical portion 26 at one end away from the bare rod segment 19 . The diameter of the cylindrical portion 26 is smaller than the diameter of the threaded rod segment 20 , and the cylindrical portion 26 is connected to the implant assembly via a rotating connection device 27 .

[0069] In this solution, the structure between the threaded rod segment 20 and the support block 23 is similar to the screw-nut pair in the prior art, and its working principle will not be described in detail in this article.

[0070] In this solution, the first bearing 21 is used to prevent the moving block 15 from rotating, so as to form a rotationally mounted relationship between the moving block 15 and the polished rod section 19 .

[0071] Among them, the installation form of the inner ring of the first bearing 21 and the polished rod section 19, and the installation form of the outer ring of the first bearing 21 and the installation opening of the moving block 15 are all hard-fitted to prevent the first bearing 21 from falling off.

[0072] As an implementation mode of this embodiment, one end of the rotating connecting device 27 has a bearing mounting port, and a second bearing 49 is installed in the bearing mounting port. The cylindrical portion 26 is installed in the inner ring of the second bearing 49. The other end of the rotating connecting device 27 is used to install the implant component. An extension portion is fixed to the lower end of the rotating connecting device 27, and the extension portion is slidably arranged in the opening 13 on the surface of the cylinder shell 11.

[0073] In this solution, the second bearing 49 and the limiting function of the extension portion are used to prevent the rotation of the rotation connection device 27, so that a rotational installation relationship is formed between the rotation connection device 27 and the cylindrical portion 26.

[0074] Among them, the installation form of the inner ring of the second bearing 49 and the cylindrical portion 26, as well as the installation form of the outer ring of the second bearing 49 and the bearing mounting opening all adopt interference fit to prevent the second bearing 49 from falling off.

[0075] As an implementation of this embodiment, a display screen 50 is installed on the end cap 14. The display screen 50 is used to display the implantation depth of the implant component. The implantation depth needs to be carried out under a specific operation mode. In the initial state, the implant component is in a straightened state, and the applicator contacts the skin or is located at a specific position, and then the applicator is controlled to be implanted to a target depth. At this time, the distance sensor 16 can obtain the depth distance of the implantation of the applicator through the moving distance of the moving block 15. The distance sensor 16 feeds back the data signal to the control system 18, and the control system 18 feeds back the collected data to the display screen 50 in real time.

[0076] As an implementation of this embodiment, the implant component includes:

[0077] A source applicator, the source applicator having a plurality of covering sheets 29;

[0078] A pneumatic switch device, on which a covering sheet 29 is rotatably mounted, and the pneumatic switch is used to simultaneously control the synchronous rotation of multiple covering sheets 29;

[0079] A connecting pipe 32, one end of which is connected to the pneumatic switch device, the rotary connecting device 27 has a sealed cavity 51, and the other end of the connecting pipe 32 is connected to the sealed cavity 51 of the rotary connecting device 27;

[0080] An air supply device is used to inflate the sealed cavity 51 with air.

[0081] Furthermore, the extension part of the lower end of the rotating connecting device 27 is an extension pipe 43, which has the function of air intake, and the lower end of the extension pipe 43 extends to the bottom of the cylinder shell 11, and the extension pipe 43 is provided with a solenoid valve 41. The air supply device adopts an air pump 42, and the air pump 42 is connected to the extension pipe 43 through a hose 44.

[0082] Furthermore, the solenoid valve 41 is a three-way valve. When the air pump 42 is not needed to work, the extension tube 43 is connected to the external air so that the qigong switch device is in an unpowered state.

[0083] Furthermore, the source applicator is an ellipsoidal structure, an implantation needle 53 is arranged inside the source applicator, the covering sheet 29 is a petal-shaped structure, and a plurality of covering sheets 29 are arranged in a circular array to form an ellipsoidal structure;

[0084] A spacing is left between two adjacent covering sheets 29 to avoid interference between the covering sheets 29 when rotating.

[0085] This solution provides a plurality of petal-shaped covering sheets 29, which can cover the implantation needle 53 when the covering sheets 29 are closed, thereby preventing the implantation needle 53 from accidentally damaging tissue when moving. When the covering sheets 29 are opened, it is convenient for the implantation needle 53 to penetrate into the tumor.

[0086] Furthermore, the air pump 42 may be a micro pump in the prior art, such as a piezoelectric micro pump, or other forms of pumps.

[0087] As an implementation mode of this embodiment, the side of the source applicator facing the pneumatic switch device has an opening, and a flexible layer 28 is installed at the opening; wherein the flexible layer 28 is a rubber film, which is used to enable the covering sheet 29 to rotate normally.

[0088] The pneumatic switchgear comprises:

[0089] A fixed cylinder 30, the end of which is provided with a plurality of hinge seats 31, on each hinge seat 31 a covering sheet 29 is rotatably mounted, and the inner hole of the fixed cylinder 30 is used to be connected with the connecting pipe 32;

[0090] The piston cylinder 33 is slidably mounted in the inner hole of the fixed cylinder 30 , and a plurality of hinged arms 34 are rotatably mounted on the piston cylinder 33 , and a covering sheet 29 is rotatably mounted on one end of each hinged arm 34 away from the piston cylinder 33 .

[0091] Furthermore, both ends of the articulated arm 34 may be installed in the form of a rotary hinge or a ball hinge.

[0092] As an implementation method of this embodiment, a positioning block 35 is provided between the piston cylinder 33 and the source applicator, and the positioning block 35 is installed in the inner wall of the fixed cylinder 30 through a fixing rod 36;

[0093] The return spring 37 is arranged between the positioning block 35 and the piston cylinder 33 .

[0094] As an implementation mode of this embodiment, a push component is also included, and the push component includes:

[0095] The piston part 38 is slidably mounted in the piston cylinder 33. The side of the piston cylinder 33 facing the connecting pipe 32 is an open structure, and the side of the piston cylinder 33 facing the source applicator is provided with a closing plate 46;

[0096] A push rod 39, one end of which is fixed to the piston portion 38, and the other end of which can slidably pass through the positioning block 35 and the flexible layer 28 and extend into the covering cavity 45 of the applicator;

[0097] The push plate 40 is located in the covering cavity 45 of the applicator and is fixed on the push rod 39 . The push plate 40 is provided with an implantation needle 53 .

[0098] Working principle: when the applicator reaches the target position, the solenoid valve 41 switches to the working mode, the extension tube 43 is connected to the air pump 42, and the air pump 42 inflates the closed cavity 51 through the extension tube 43. The gas flows into the fixed cylinder 30 and pushes the piston cylinder 33 to move linearly. At the same time, the gas flowing into the piston cylinder 33 pushes the piston part 38 to move linearly.

[0099] When the piston cylinder 33 moves, the cover sheet 29 is pushed to open through the hinged arm 34, and the return spring 37 is compressed at the same time.

[0100] When the piston part 38 moves, the push plate 40 is driven to move linearly through the push rod 39, and the implantation needle 53 is inserted into the tumor. Among them, implantation radiotherapy belongs to the existing medical scheme, and the implantation needle 53 is connected to the afterloading treatment machine through the connecting pipeline. This part of the content belongs to the existing technology, and in this scheme, the connecting pipeline connected to the afterloading treatment machine passes through the avoidance hole in the flexible layer 28 and is connected to the implantation needle 53. Since this part of the content is the existing technology, it is not reflected in the drawings, and this article will not be further described.

[0101] Furthermore, an air pressure sensor is also provided on the extension tube 43, and the air pressure sensor is electrically connected or signal-connected to the control system 18. When the air pressure sensor detects that the air pressure reaches the set value, the signal is fed back to the control system 18. Since the implantation of the implant needle 53 has been completed at this time, the control system 18 turns off the power supply of the air pump 42, and the solenoid valve 41 is switched to be connected to the air. Under the action of the reset spring 37, the source applicator is closed again. Alternatively, the control system 18 directly controls the air pump 42 to inhale the extension tube 43, so that the fixed cylinder 30 and the piston cylinder 33 generate negative pressure to achieve the closure of the source applicator.

[0102] In the above scheme, the rotation of the polished rod section 19 is achieved by rotating the end cover 14. This scheme also proposes a scheme for automatically realizing the rotation of the polished rod section 19, such as Figure 4 As shown, a plurality of groups of rotor modules 47 are linearly arranged on the polished rod segment 19 , and a stator module 48 is provided on the inner wall of the accommodating chamber 12 . The stator module 48 drives the polished rod segment 19 to rotate through the rotor module 47 .

[0103] In this solution, multiple groups of rotor modules 47 are linearly arranged to facilitate the effective rotation of the polished rod segment 19, and are used to adapt to the characteristics of the polished rod segment 19 being in a moving state. The stator module 48 is used in one group, which takes into account the rationality of the structure.

[0104] In this solution, the forward or reverse rotation of the bare rod segment 19 is controlled by switching the current direction of the coil in the stator module 48 .

[0105] According to the instruction, when the control system 18 detects that the applicator reaches the target depth, it stops supplying power to the coil to stop the applicator from moving forward.

[0106] For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, all of which fall within the protection scope of the present invention.

Claims

1. A source applicator implantation system, characterized in that: include: A cylindrical shell (11), wherein the cylindrical shell (11) has a containing chamber (12), and a surface of the cylindrical shell (11) is provided with an opening (13) penetrating the containing chamber (12), and a length direction of the opening (13) is parallel to an axial direction of the cylindrical shell (11); A moving component, the moving component is arranged in the accommodating chamber (12), an end cap (14) is installed at one end of the moving component, and an implanting component is installed at the other end of the moving component; A moving block (15), the moving block (15) being mounted on the moving assembly; A distance measuring sensor (16) is installed in the inner wall of the accommodating chamber (12) via a fixing plate, and the distance measuring sensor (16) is used to detect the moving distance of the moving block (15).

2. The applicator implantation system according to claim 1, characterized in that: It also includes a control system (18), wherein the control system (18) is electrically connected or signal-connected to the distance measuring sensor (16); and an inner cavity for installing the control system (18) is provided in the end cover (14).

3. The applicator implantation system according to claim 2, characterized in that: The mobile assembly comprises: A moving rod, the moving rod comprising a smooth rod section (19) and a threaded rod section (20), the smooth rod section (19) being mounted in a mounting opening of the moving block (15) via a first bearing (21), the lower end of the moving block (15) comprising a sliding protrusion (22), the sliding protrusion (22) being slidably disposed in an opening (13) on the surface of the cylindrical shell (11); A support block (23), the support block (23) being mounted in the inner wall of the cylinder shell (11) by means of bolts (25), and the support block (23) being provided with a threaded hole for mounting the threaded rod segment (20); The end cap (14) is fixed to the end of the bare rod segment (19) away from the threaded rod segment (20), and the end of the threaded rod segment (20) away from the bare rod segment (19) has a cylindrical portion (26), the diameter of the cylindrical portion (26) is smaller than the diameter of the threaded rod, and the cylindrical portion (26) is connected to the implant component via a rotating connection device (27).

4. The applicator implantation system according to claim 3, characterized in that: One end of the rotating connection device (27) has a bearing mounting opening, in which a second bearing (49) is mounted, and the cylindrical portion (26) is mounted in the inner ring of the second bearing (49). The other end of the rotating connection device (27) is used to mount the implant component, and an extension portion is fixed to the lower end of the rotating connection device (27), and the extension portion is slidably arranged in an opening (13) on the surface of the barrel shell (11).

5. The applicator implantation system according to claim 1, characterized in that: A display screen (50) is mounted on the end cover (14).

6. The applicator implantation system according to claim 4, characterized in that: The implant assembly comprises: A source applicator, the source applicator having a plurality of covering sheets (29); A pneumatic switch device, on which the covering sheet (29) is rotatably mounted, and the pneumatic switch is used to simultaneously control the synchronous rotation of a plurality of the covering sheets (29); a connecting pipe (32), one end of the connecting pipe (32) being connected to the pneumatic switch device, the rotating connecting device (27) having a sealed cavity (51), and the other end of the connecting pipe (32) being connected to the sealed cavity (51) of the rotating connecting device (27); An air supply device, wherein the air supply device is used to inflate air into the closed cavity (51).

7. The applicator implantation system according to claim 6, characterized in that: The source applicator is an ellipsoidal structure, an implantation needle (53) is arranged inside the source applicator, the covering sheet (29) is a petal-shaped structure, and a plurality of the covering sheets (29) are arranged in a circular array to form an ellipsoidal structure; A spacing is left between two adjacent covering sheets (29) to avoid interference between the covering sheets (29) when rotating.

8. The applicator implantation system according to claim 7, characterized in that: The source applicator has an opening on one side facing the pneumatic switch device, and a flexible layer (28) is installed at the opening; The pneumatic switch device comprises: A fixed cylinder (30), wherein a plurality of hinge seats (31) are provided at the end of the fixed cylinder (30), a covering sheet (29) is rotatably mounted on each hinge seat (31), and an inner hole of the fixed cylinder (30) is used to be connected to the connecting pipe (32); A piston cylinder (33), wherein the piston cylinder (33) is slidably mounted in the inner hole of the fixed cylinder (30), and a plurality of hinged arms (34) are rotatably mounted on the piston cylinder (33), and a covering sheet (29) is rotatably mounted on one end of each hinged arm (34) away from the piston cylinder (33).

9. The applicator implantation system according to claim 8, characterized in that: A positioning block (35) is provided between the piston cylinder (33) and the source applicator, and the positioning block (35) is installed in the inner wall of the fixed cylinder (30) through a fixing rod (36); A return spring (37), wherein the return spring (37) is arranged between the positioning block (35) and the piston cylinder (33).

10. The applicator implantation system according to claim 9, characterized in that: It also includes a push component, which includes: A piston portion (38), wherein the piston portion (38) is slidably mounted in the piston cylinder (33), the side of the piston cylinder (33) facing the connecting pipe (32) is an open structure, and the side of the piston cylinder (33) facing the source applicator is provided with a closing plate (46); A push rod (39), one end of which is fixed on the piston portion (38), and the other end of which is slidably passed through the positioning block (35) and the flexible layer (28) and extends into the covering cavity (45) of the applicator; A push plate (40), the push plate (40) is located in the covering cavity (45) of the applicator, and the push plate (40) is fixed on the push rod (39), and an implantation needle (53) is installed on the push plate (40).

Images