An oval body adjustable gynecological close-range rear-loading source applicator

Abstract

An oval body adjustable gynecological close-range after-loading source applicator solves the problem that cervical cancer patients who cannot adapt to various vaginal environments in the prior art are prone to errors in radiotherapy doses, leading to tumor control failure and aggravated side effects. It includes an intermediate connecting frame composed of a connecting frame body, characterized in that: the source applicator bend is inserted into the bend installation hole at the upper end of the intermediate connecting frame; the oval body left hemisphere and the oval body right hemisphere symmetrically arranged on both sides of the intermediate connecting frame are both composed of hemispherical shells, and the opposite sides of the two hemispherical shells are respectively provided with concave cavities; the oval body left hemisphere and the oval body right hemisphere are connected to the intermediate connecting frame through an oval body adjustment mechanism. It has a reasonable design and a compact structure, can meet the treatment needs of different types of patients with mid- and late-stage cervical cancer radiotherapy, is easy to operate, can effectively improve the quality of radiotherapy, is non-invasive, has small side effects after treatment, is economical and practical, and has good patient compliance.

Description

Technical Field

[0001] The present invention belongs to the technical field of tumor radiotherapy equipment, and specifically relates to an oval-shaped adjustable gynecological close-range after-loading source applicator that can meet the treatment needs of different types of patients with mid- and late-stage cervical cancer radiotherapy, is easy to operate, can effectively improve the quality of radiotherapy, is non-invasive, has few side effects after treatment, is economical and practical, and has good patient compliance. Background Art

[0002] With the development of tumor radiotherapy technology, brachytherapy has begun to be widely used in the treatment of malignant tumors. Especially for some patients with advanced cervical cancer who cannot undergo surgical treatment, radiotherapy is one of the most effective treatment methods, and brachytherapy plays a vital role in the entire treatment process. The shortcomings of existing oval applicators in clinical use are: there are too few types of oval bodies, which cannot adapt to cervical cancer patients in various vaginal environments; when the applicator is implanted, the front end of the oval body often does not fit tightly with the patient's cervical vault, and the oval body is displaced greatly, which in turn causes large errors in radiotherapy doses, and even leads to failure of tumor control or aggravation of side effects. Therefore, it is necessary to improve the existing gynecological brachytherapy devices. Summary of the invention

[0003] The present invention is aimed at the above-mentioned problems and provides an oval adjustable gynecological close-range after-loading applicator that can meet the treatment needs of different types of patients undergoing radiotherapy for mid- and late-stage cervical cancer. It is easy to operate, can effectively improve the quality of radiotherapy, is non-invasive, has few side effects after treatment, is economical and practical, and has good patient compliance.

[0004] The technical solution adopted by the present invention is: the oval body adjustable gynecological close-range rear-mounted source applicator includes an intermediate connecting frame, and is characterized in that: the intermediate connecting frame is composed of a connecting frame main body, and a curved tube mounting hole is provided at the upper end of the connecting frame main body, and the source applicator curved tube is inserted into the curved tube mounting hole; the oval body left hemisphere and the oval body right hemisphere are symmetrically provided on both sides of the intermediate connecting frame, and the oval body left hemisphere and the oval body right hemisphere have the same structure, both of which are composed of a hemispherical shell, and the opposite sides of the two hemispherical shells are respectively provided with a concave cavity; the oval body left hemisphere and the oval body right hemisphere are connected to the intermediate connecting frame through an oval body adjustment mechanism, and the oval body left hemisphere and the oval body right hemisphere are combined to form an adjustable oval sphere.

[0005] The oval body adjustment mechanism includes an opening and closing driving gear, an oval body adjustment rotating rod is fixedly arranged in the middle of the opening and closing driving gear, and the oval body adjustment rotating rod is rotatably arranged in the adjustment rotating rod installation through hole in the middle of the connecting frame body of the intermediate connecting frame; and, above and below the opening and closing driving gear, an opening and closing driven rack II and an opening and closing driven rack I arranged in parallel with each other are respectively arranged, the upper side of the opening and closing driven rack I is meshed with the opening and closing driving gear, and one end of the opening and closing driven rack I is connected to the left hemisphere of the oval body; the lower side of the opening and closing driven rack II is meshed with the opening and closing driving gear, and one end of the opening and closing driven rack II is connected to the right hemisphere of the oval body. The opening and closing driving gear drives the opening and closing driven rack I and the opening and closing driven rack II meshed with it to move in opposite directions respectively, thereby driving the left hemisphere of the oval body and the right hemisphere of the oval body on both sides of the intermediate connecting frame to open or close.

[0006] The lower side of the opening and closing driven rack I and the upper side of the opening and closing driven rack II are respectively provided with rack guide gears, and the guide gear rotating shaft in the middle of the rack guide gear is respectively rotatably connected with the wheel axle mounting hole on the connecting frame body of the intermediate connecting frame; and the lower side of the opening and closing driven rack I and the upper side of the opening and closing driven rack II are respectively meshed with the corresponding rack guide gears. The rack guide gears on the lower side of the opening and closing driven rack I and the upper side of the opening and closing driven rack II are used to effectively guide the linear movement of the opening and closing driven rack, and ensure the stability of the reciprocating motion of the opening and closing driven rack I and the opening and closing driven rack II.

[0007] The end of the opening and closing driven rack I that is not connected to the left hemisphere of the oval body and the end of the opening and closing driven rack II that is not connected to the right hemisphere of the oval body are respectively provided with rack limit blocks. The rack limit blocks are used to limit the moving positions of the opening and closing driven rack I and the opening and closing driven rack II, thereby improving the reliability of the device.

[0008] The side of the opening and closing active gear in the middle of the intermediate connecting frame is provided with an active gear lock, which is composed of a gear lock body, and a locking tooth is provided on the side of the gear lock body that contacts the opening and closing active gear; the gear lock body is also provided with a gear lock driving rod extending to the rear side, and the gear lock driving rod includes a connecting curved rod connected to the gear lock body, and a locking driving straight rod is provided at the end of the connecting curved rod; and the connecting curved rod of the gear lock driving rod is movably arranged in the driving rod guide groove on the side of the connecting frame body of the intermediate connecting frame. The gear lock driving rod is operated to drive the gear lock body of the active gear lock to approach or separate from the opening and closing active gear, thereby realizing the locking and loosening of the opening and closing active gear.

[0009] A gear lock rod inner hook is provided at the rear side of the connecting frame body of the intermediate connecting frame, at a position corresponding to the gear lock driving rod of the active gear lock, and the gear lock rod inner hook is connected to the intermediate connecting frame via a hook rotating shaft. When the left hemisphere of the oval body and the right hemisphere of the oval body are in the expanded state, the gear lock rod inner hook is used to clamp the locking position of the gear lock driving rod of the active gear lock, thereby further improving the reliability of the device.

[0010] A gear lock rod outer hook is provided at a position corresponding to the gear lock driving rod of the active gear lock on the left hemisphere of the oval body or the right hemisphere of the oval body, and the gear lock rod outer hook is connected to the rear side of the left hemisphere of the oval body or the right hemisphere of the oval body through a hook rotating shaft, so that when the left hemisphere of the oval body and the right hemisphere of the oval body are in a closed state, the gear lock rod outer hook is used to clamp the position of the gear lock driving rod of the active gear lock.

[0011] The oval body adjusting rotating rod is composed of an adjusting rotating rod body, the middle part of which is connected to the opening and closing active gear through a connecting key arranged in a gear connecting key slot; and a rotating rod driving part is arranged at one end of the adjusting rotating rod body facing the vaginal opening. The rotating rod driving part drives the oval body adjusting rotating rod to rotate, thereby driving the opening and closing active gear on the adjusting rotating rod body to rotate.

[0012] The rear end of the rotating rod driving part of the oval body adjusting rotating rod is detachably provided with a rotating rod rotating plug rod; the rotating rod rotating plug rod is composed of a rotating plug rod body, the front end of the rotating plug rod body is provided with a rotating rod plug part, and the rear end of the rotating plug rod body is provided with a rotating handle. The rotating rod plug part at the front end of the rotating rod rotating plug rod is matched and connected with the rotating rod driving part at the rear end of the oval body adjusting rotating rod, and the rotating rod rotating plug rod is used to drive the oval body adjusting rotating rod to rotate.

[0013] The front end of the rotating rod body of the rotating rod is also provided with an auxiliary shifting part, so that the gear lock rod inner hook, gear lock rod outer hook and gear lock driving rod can be shifted by the auxiliary shifting part at the front end of the rotating rod, so as to facilitate the operation of the device.

[0014] The beneficial effects of the present invention are as follows: since the present invention adopts an intermediate connecting frame composed of a connecting frame main body, a bend pipe mounting hole is provided at the upper end of the connecting frame main body, and a source applicator bend pipe is inserted in the bend pipe mounting hole; an oval left hemisphere and an oval right hemisphere are symmetrically provided on both sides of the intermediate connecting frame, and the oval left hemisphere and the oval right hemisphere with the same structure are both composed of a hemispherical shell, and the opposite sides of the two hemispherical shells are respectively provided with a concave cavity; the oval left hemisphere and the oval right hemisphere are connected to the intermediate connecting frame through an oval body adjustment mechanism, and the oval left hemisphere and the oval right hemisphere are combined to form an adjustable oval spherical structure, so it has a reasonable design, a compact structure, and is easy to operate. The size of the oval spherical body can be flexibly adjusted in combination with treatment needs to improve the treatment efficiency; it can meet the treatment needs of different types of patients with mid- and late-stage cervical cancer radiotherapy, and in the process of individualized treatment, the same set of oval body rear-mounted source applicators can be used when the size of the patient's vaginal vault and the condition change, thereby saving medical costs and reducing the economic burden on patients. The gynecological close-range afterloading applicator can effectively improve the quality of radiotherapy, is non-invasive, has little side effects after treatment, is economical and practical, and has good patient compliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention (partial internal structure is shown in cross-section).

[0016] Figure 2 yes Figure 1 A-direction view.

[0017] Figure 3 yes Figure 2 A structural schematic diagram of the opening and closing driving gear in the middle rotating to drive the left hemisphere of the oval body and the right hemisphere of the oval body on both sides of the middle connecting frame to open.

[0018] Figure 4 yes Figure 3 A structural diagram of the right hemisphere of the oval body (left hemisphere of the oval body) in Figure 1.

[0019] Figure 5 yes Figure 1 A structural schematic diagram of the intermediate connecting frame in FIG.

[0020] Figure 6 yes Figure 3 Schematic diagram of the structure of the oval body regulating rod.

[0021] Figure 7 yes Figure 3 A structural schematic diagram of a rotating rod rotating an inserting rod.

[0022] Figure 8 yes Figure 1 A structural schematic diagram of the active gear lock in FIG.

[0023] Fig. 9 It is a schematic diagram of a use state of the present invention.

[0024] Fig.10 yes Fig. 9 Cross-sectional view of .

[0025] Description of the numbers in the figure: 1 intermediate connecting frame, 2 left hemisphere of oval body, 3 right hemisphere of oval body, 4 opening and closing driving gear, 5 oval body adjusting rotating rod, 6 opening and closing driven rack I, 7 opening and closing driven rack II, 8 rack guide gear, 9 guide gear shaft, 10 rack limit block, 11 driving gear lock, 12 gear lock driving rod, 13 gear lock rod outer hook, 14 source applicator elbow, 15 adjustable oval sphere, 16 hook shaft, 17 rotating rod rotating plug rod, 18 gear lock rod inner hook, 19 hemispherical shell, 20 concave cavity, 21 plug rod plug hole, 22 elbow plug hole, 23 connection The frame body, 24 adjusting rotating rod mounting through hole, 25 axle mounting hole, 26 elbow mounting hole, 27 driving rod guide groove, 28 adjusting rotating rod body, 29 gear connection keyway, 30 rotating rod driving part, 31 hexagonal connector, 32 driving rod avoidance notch, 33 marking dial, 34 rotating plug rod body, 35 rotating rod plug-in part, 36 rotating handle, 37 inner hexagon socket, 38 auxiliary toggle part, 39 gear lock body, 40 locking teeth, 41 connecting bent rod, 42 locking driving straight rod, 43 vagina, 44 rectum, 45 uterus, 46 cervical vault, 47 tumor, 48 radiation source channel. DETAILED DESCRIPTION

[0026] according to Figures 1 to 8 The specific structure of the present invention is described in detail. The oval body adjustable gynecological close-range rear-mounted source applicator includes an intermediate connecting frame 1 composed of a connecting frame body 23, and the upper end of the connecting frame body 23 of the intermediate connecting frame 1 is provided with a bend pipe mounting hole 26, and the source applicator bend pipe 14 is inserted in the bend pipe mounting hole 26. The oval body left hemisphere 2 and the oval body right hemisphere 3 are symmetrically arranged on both sides of the intermediate connecting frame 1; the oval body left hemisphere 2 and the oval body right hemisphere 3 with the same structure are both composed of a hemispherical shell 19, and the opposite sides of the two hemispherical shells 19 are respectively provided with a concave cavity 20 for accommodating the intermediate connecting frame 1 and the oval body adjustment mechanism. The oval body left hemisphere 2 and the oval body right hemisphere 3 are combined to form the entire adjustable oval sphere 15, and the upper parts of the oval body left hemisphere 2 and the oval body right hemisphere 3 are respectively provided with bend pipe plugging holes 22 for facilitating the insertion of the source applicator bend pipe 14.

[0027] The oval body left hemisphere 2 and the oval body right hemisphere 3 are connected to the middle connecting frame 1 through the oval body adjustment mechanism. The oval body adjustment mechanism includes an opening and closing driving gear 4, and an oval body adjustment rotating rod 5 is fixedly arranged in the middle of the opening and closing driving gear 4. The oval body adjustment rotating rod 5 is rotatably arranged in the adjustment rotating rod installation through hole 24 in the middle of the connecting frame body 23 of the middle connecting frame 1. The oval body adjustment rotating rod 5 is composed of an adjustment rotating rod body 28, and the middle of the adjustment rotating rod body 28 is connected to the opening and closing driving gear 4 through a connecting key arranged in a gear connecting key slot 29. In addition, a rotating rod driving part 30 is provided at one end of the adjusting rotating rod body 28 facing the vaginal opening, and a driving rod avoidance notch 32 is provided on the side wall of the rotating rod driving part 30; the other end of the adjusting rotating rod body 28 is provided with an identification dial 33 for indicating the expansion width of the left hemisphere 2 and the right hemisphere 3 of the oval body; the rotating rod driving part 30 is used to drive the oval body adjusting rotating rod 5 to rotate, thereby driving the opening and closing active gear 4 on the adjusting rotating rod body 28 to rotate.

[0028] The rear end of the rotating rod driving part 30 of the oval adjusting rotating rod 5 is detachably provided with a rotating rod rotating plug rod 17. The rotating rod rotating plug rod 17 is composed of a rotating plug rod body 34, and a rotating rod plug-in part 35 is provided at the front end of the rotating plug rod body 34. The front end surface of the rotating rod plug-in part 35 of the rotating rod rotating plug rod 17 is provided with a hexagon socket 37; accordingly, the rear end of the rotating rod driving part 30 of the oval adjusting rotating rod 5 is provided with a hexagonal connector 31. The rear end of the rotating plug rod body 34 is provided with a rotating handle 36, and the front end of the rotating plug rod body 34 and the outer side wall of the rotating rod plug-in part 35 are also provided with an auxiliary toggle part 38 composed of a bent plate. Then, the rod plug-in portion 35 at the front end of the rod rotating plug-in rod 17 is matched and connected with the rod driving portion 30 at the rear end of the oval body adjusting rod 5, and the rod rotating plug-in rod 17 is used to drive the oval body adjusting rod 5 to rotate; and the auxiliary toggle portion 38 at the front end of the rod rotating plug-in rod 17 is used to assist in toggling the gear lock rod inner hook 18, the gear lock rod outer hook 13 and the gear lock driving rod 12, so as to facilitate the operation of the device. At the same time, the middle part of the rear side of the oval body left hemisphere 2 and the oval body right hemisphere 3 are respectively provided with a plug-in hole 21 for facilitating the insertion of the rod rotating plug-in rod 17.

[0029] Above and below the opening and closing driving gear 4 which is rotatably arranged in the middle of the front side of the intermediate connecting frame 1, there are respectively arranged opening and closing driven racks II7 and opening and closing driven racks I6 which are arranged in parallel with each other. Both the opening and closing driven racks I6 and the opening and closing driven racks II7 are racks with spur teeth on the upper and lower surfaces. The upper spur teeth of the opening and closing driven rack I6 mesh with the opening and closing driving gear 4, and one end of the opening and closing driven rack I6 is connected to the left hemisphere 2 of the oval body; the lower spur teeth of the opening and closing driven rack II7 mesh with the opening and closing driving gear 4, and one end of the opening and closing driven rack II7 is connected to the right hemisphere 3 of the oval body; the opening and closing driven gear 4 drives the opening and closing driven racks I6 and the opening and closing driven racks II7 which are meshed with the opening and closing driving gear 4 to move in opposite directions, thereby driving the left hemisphere 2 of the oval body and the right hemisphere 3 of the oval body on both sides of the intermediate connecting frame 1 to open or close. In order to improve the reliability of the device, a rack limit block 10 is provided on the end of the opening and closing driven rack I6 that is not connected to the left hemisphere 2 of the oval body, and on the end of the opening and closing driven rack II7 that is not connected to the right hemisphere 3 of the oval body, respectively, so as to limit the moving positions of the opening and closing driven rack I6 and the opening and closing driven rack II7 by the rack limit block 10.

[0030] Rack guide gears 8 are provided on the lower side of the opening and closing driven rack I6 and the upper side of the opening and closing driven rack II7, respectively. The guide gear rotating shaft 9 in the middle of each rack guide gear 8 is rotatably connected to the wheel axle mounting hole 25 on the connecting frame body 23 of the intermediate connecting frame 1. In addition, the lower spur teeth of the opening and closing driven rack I6 and the upper spur teeth of the opening and closing driven rack II7 are respectively meshed with the corresponding rack guide gears 8. Therefore, the rack guide gears 8 on the lower side of the opening and closing driven rack I6 and the upper side of the opening and closing driven rack II7 are used to effectively guide the linear movement of the opening and closing driven rack, and ensure the stability of the reciprocating motion of the opening and closing driven rack I6 and the opening and closing driven rack II7.

[0031] The side of the opening and closing active gear 4 is provided with an active gear lock 11 for locking the active gear. The active gear lock 11 is composed of a gear lock body 39, and a locking tooth 40 is provided on the side of the gear lock body 39 that contacts the opening and closing active gear 4. The gear lock body 39 is also provided with a gear lock driving rod 12 extending to the rear side, and the gear lock driving rod 12 includes a connecting curved rod 41 connected to the gear lock body 39, and a locking driving straight rod 42 is provided at the end of the connecting curved rod 41. In addition, the connecting curved rod 41 of the gear lock driving rod 12 is movably inserted into the driving rod guide groove 27 on the side of the connecting frame body 23 of the intermediate connecting frame 1; the gear lock body 39 of the active gear lock 11 is driven to approach or separate from the opening and closing active gear 4 by operating the gear lock driving rod 12, thereby realizing the locking and loosening of the opening and closing active gear 4.

[0032] A gear lock rod inner hook 18 is provided at the rear side of the connecting frame body 23 of the intermediate connecting frame 1, at a position corresponding to the gear lock driving rod 12 of the active gear lock 11. The gear lock rod inner hook 18 is connected to the intermediate connecting frame 1 through the hook rotating shaft 16; when the oval left hemisphere 2 and the oval right hemisphere 3 are in the open state, the gear lock rod inner hook 18 is used to clamp the locking position of the gear lock driving rod 12 of the active gear lock 11, thereby further improving the reliability of the device. In addition, a gear lock rod outer hook 13 is also provided at a position corresponding to the gear lock driving rod 12 of the active gear lock 11 on the oval left hemisphere 2 or the oval right hemisphere 3. The outer hook 13 of the gear lock rod is connected to the rear side of the left hemisphere 2 or the right hemisphere 3 of the oval body through the hook shaft 16, and then when the left hemisphere 2 and the right hemisphere 3 of the oval body are in a closed state, the outer hook 13 of the gear lock rod is used to fix the position of the gear lock driving rod 12 of the active gear lock 11.

[0033] When the oval adjustable gynecological close-distance afterloading applicator is used, first, according to the size of the tumor of the cervical cancer patient, combined with the patient's imaging data and the doctor's physical examination, as well as the irregularity of the cross section of the cervical vault 46, it is determined to use two oval applicators for afterloading radiotherapy, and the cross-sectional size of the cervical vault 46 and the position of the tumor 47 are measured. Then, the front end of an applicator curved tube 14 is inserted into the curved tube installation hole 26 at the upper end of the intermediate connecting frame 1 of a gynecological close-distance afterloading applicator through the curved tube plug-in hole 22 at the upper part of the adjustable oval sphere 15, and fixed. Afterwards, according to the cross-sectional size of the patient's cervical vault 46, the rotating rod is used to rotate the insertion rod 17 to drive the oval body adjustment rotating rod 5 and the opening and closing driving gear 4 arranged thereon to rotate together; and then, through the rotating opening and closing driving gear 4, the opening and closing driven rack Ⅰ6 and the opening and closing driven rack Ⅱ7 engaged therewith are driven to move in opposite directions respectively, so as to drive the oval body left hemisphere 2 and the oval body right hemisphere 3 on both sides of the middle connecting frame 1 to gradually separate (expand).

[0034] When the oval body left hemisphere 2 and the oval body right hemisphere 3 are separated to the required width (for example: 30mm), the gear lock driving rod 12 drives the gear lock body 39 of the active gear lock 11 to approach the opening and closing active gear 4, thereby locking the position of the opening and closing active gear 4, so that the open position of the oval body left hemisphere 2 and the oval body right hemisphere 3 is fixed. Subsequently, the gynecological close-range rear-loading source applicator in the open state is implanted along the patient's vagina 43 to the right side of the cervical vault 46, so that the adjustable oval sphere 15 is closely fitted with the right side of the cervical vault 46, and the lower part of the adjustable oval sphere 15 is against the bottom of the vagina 43. Insert the front end of another applicator bend tube 14 into the bend tube mounting hole 26 at the upper end of the middle connecting frame 1 of another gynecological close-distance after-loading applicator, and then use the rotating rod to rotate the insertion rod 17 to drive the left hemisphere 2 and the right hemisphere 3 of the oval body to gradually separate; and when the left hemisphere 2 and the right hemisphere 3 of the oval body are separated to the required width (for example: 25mm), the opening and closing active gear 4 is locked by the active gear lock 11. It can be understood that, according to specific usage needs, the expansion widths of the adjustable oval spheres 15 of the two gynecological close-distance after-loading applicators can be different or the same. Afterwards, this (another) gynecological close-distance after-loading applicator in the expanded state is implanted along the patient's vagina 43 to the left side of the cervical vault 46, and the lower part of the adjustable oval sphere 15 is against the bottom of the vagina 43, thereby forming a radiation source channel 48 in the vagina 43.

[0035] Then, the two gynecological close-distance after-loading applicators are fixed by connecting components (for example, fixing screws), so that the positions of the two applicators are relatively fixed and there is no left-right movement; the two gynecological close-distance after-loading applicators are fixed to the patient by a belly band, and the subsequent tumor 47 radiotherapy is carried out. After the tumor 47 radiotherapy is completed, the active gear lock 11 is driven to release the opening and closing active gear 4, and then the adjustable oval spheres 15 of the two gynecological close-distance after-loading applicators are closed by rotating the plug 17 with a rotating rod, and the gynecological close-distance after-loading applicators are taken out from the patient's vagina 43, disinfected, and reused. The implantation method of the gynecological close-distance after-loading applicator with an adjustable oval body can flexibly adjust the size of the oval sphere according to the actual situation of the patient, thereby realizing individualized treatment. It is easy to operate, can effectively improve the quality of radiotherapy, is non-invasive, has small side effects after treatment, and does not add economic burden to patients.

Claims

1. An oval adjustable gynecological close-range rear-loading source applicator, comprising an intermediate connecting frame (1), characterized in that: The intermediate connecting frame (1) is composed of a connecting frame body (23), the upper end of which is provided with a bend pipe mounting hole (26), in which a source applicator bend pipe (14) is inserted; the left hemisphere (2) and the right hemisphere (3) of the oval body are symmetrically arranged on both sides of the intermediate connecting frame (1), the left hemisphere (2) and the right hemisphere (3) of the oval body have the same structure, and are both composed of a hemispherical shell (19), and the opposite sides of the two hemispherical shells (19) are respectively provided with a concave cavity (20); the left hemisphere (2) of the oval body is symmetrically arranged on both sides of the intermediate connecting frame (1). The ball (2) and the right hemisphere (3) of the oval body are connected to the middle connecting frame (1) through an oval body adjustment mechanism, and the left hemisphere (2) and the right hemisphere (3) of the oval body are combined to form an adjustable oval sphere (15); the oval body adjustment mechanism comprises an opening and closing driving gear (4), an oval body adjustment rotating rod (5) is fixedly arranged in the middle of the opening and closing driving gear (4), and the oval body adjustment rotating rod (5) is rotatably arranged in an adjustment rotating rod installation through hole (24) in the middle of a connecting frame body (23) of the middle connecting frame (1); and the upper and lower parts of the opening and closing driving gear (4) are Below, there are respectively provided an opening and closing driven rack II (7) and an opening and closing driven rack I (6) arranged in parallel with each other, the upper side of the opening and closing driven rack I (6) is meshed with the opening and closing driving gear (4), and one end of the opening and closing driven rack I (6) is connected to the left hemisphere (2) of the oval body; the lower side of the opening and closing driven rack II (7) is meshed with the opening and closing driving gear (4), and one end of the opening and closing driven rack II (7) is connected to the right hemisphere (3) of the oval body; the lower side of the opening and closing driven rack I (6) and the upper side of the opening and closing driven rack II (7) are respectively provided with a rack guide gear (8 ), the guide gear rotating shaft (9) in the middle of the rack guide gear (8) is rotatably connected to the wheel axle mounting hole (25) on the connecting frame body (23) of the intermediate connecting frame (1); and the lower side of the opening and closing driven rack I (6) and the upper side of the opening and closing driven rack II (7) are respectively meshed with the corresponding rack guide gear (8); the end of the opening and closing driven rack I (6) that is not connected to the left hemisphere (2) of the oval body, and the end of the opening and closing driven rack II (7) that is not connected to the right hemisphere (3) of the oval body, are respectively provided with a rack limit stopper (10).

2. The oval adjustable gynecological close-range after-loading source applicator according to claim 1, characterized in that: A driving gear lock (11) is provided on the side of the opening and closing driving gear (4) in the middle of the intermediate connecting frame (1). The driving gear lock (11) is composed of a gear lock body (39). A locking tooth (40) is provided on the side of the gear lock body (39) that contacts the opening and closing driving gear (4). A gear lock driving rod (12) extending rearward is also provided on the gear lock body (39). The gear lock driving rod (12) includes a connecting bent rod (41) connected to the gear lock body (39). A locking driving straight rod (42) is provided at the end of the connecting bent rod (41). Furthermore, the connecting bent rod (41) of the gear lock driving rod (12) is movably arranged in a driving rod guide groove (27) on the side of the connecting frame body (23) of the intermediate connecting frame (1).

3. The oval adjustable gynecological close-range after-loading source applicator according to claim 2, characterized in that: A gear lock rod inner hook (18) is provided on the rear side of the connecting frame body (23) of the intermediate connecting frame (1) at a position corresponding to the gear lock driving rod (12) of the active gear lock (11), and the gear lock rod inner hook (18) is connected to the intermediate connecting frame (1) via a hook rotating shaft (16).

4. The oval adjustable gynecological close-range after-loading source applicator according to claim 2, characterized in that: A gear lock rod outer hook (13) is provided on the oval body left hemisphere (2) or the oval body right hemisphere (3) at a position corresponding to the gear lock driving rod (12) of the active gear lock (11), and the gear lock rod outer hook (13) is connected to the rear side of the oval body left hemisphere (2) or the oval body right hemisphere (3) via a hook rotating shaft (16).

5. The oval adjustable gynecological close-range after-loading source applicator according to claim 1, characterized in that: The oval adjusting rotating rod (5) is composed of an adjusting rotating rod body (28), the middle portion of which is connected to the opening and closing driving gear (4) via a connecting key arranged in a gear connecting key slot (29); and a rotating rod driving portion (30) is arranged at one end of the adjusting rotating rod body (28) facing the vaginal opening.

6. The oval adjustable gynecological close-range after-loading source applicator according to claim 5, characterized in that: A rotating rod rotating plug (17) is detachably provided at the rear end of the rotating rod driving portion (30) of the oval adjusting rotating rod (5); the rotating rod rotating plug (17) is composed of a rotating plug body (34), a rotating rod plugging portion (35) is provided at the front end of the rotating plug body (34), and a rotating handle (36) is provided at the rear end of the rotating plug body (34).

7. The oval adjustable gynecological close-range after-loading source applicator according to claim 6, characterized in that: The front end of the rotating rod body (34) of the rotating rod rotating rod (17) is also provided with an auxiliary shifting portion (38).

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