Radioactive source feeding device

Abstract

The utility model discloses a radioactive source feeding device which comprises the components of a base which is provided with an annular channel for storing particles; the particle filling ring mechanism comprises a particle filling ring which is rotationally arranged on the base and is used for pushing particles at the particle channel into the annular channel, and a particle blocking sheet assembly which is linked with the particle filling ring to block the particles in the annular channel; the particle pushing ring mechanism comprises a particle pushing ring base assembly rotationally arranged on the base and a particle pushing ring installed on the particle pushing ring base assembly, and the particle pushing ring has the tendency to be close to the particle channel under the driving of a particle pushing ring base; the particle shielding cover is connected with the base, a containing cavity for containing the particle filling ring mechanism and the particle pushing ring mechanism is formed between the particle shielding cover and the base, and a particle pushing channel corresponding to the particle channel is formed in the particle shielding cover. According to the radioactive source feeding device, filling and pushing of particles are facilitated, and operation efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a radioactive source feeding device. Background Art

[0002] Internal radiotherapy, also known as brachytherapy, is a treatment method that places radioactive materials directly in or near tumor tissue. This treatment method can effectively and continuously kill tumor cells. At the same time, interventional puncture surgery guided by images such as CT and MRI is more precise and causes less damage to surrounding normal tissues. In particular, compared with the poor curative effect of surgical treatment, recurrent tumors, metastatic tumors, and immunotherapy resistance, combined internal radiotherapy has less trauma, can preserve the body's important organs and functions, improve the patient's healing effect and reduce the additional damage caused by treatment.

[0003] With the increase in the number of internal radiotherapy surgeries, some complex surgeries require the insertion of 20 or 30 puncture needles and the implantation of nearly 100 radioactive particles (possibly more), which greatly increases the labor intensity of doctors and also increases the risk of radiation exposure, affecting their health. In recent years, with the popularization of surgical robots, especially the development of interventional puncture surgical robots guided by image processing technology, it can help doctors reduce their labor intensity and improve surgical efficiency.

[0004] The radiation source here is a particle with a diameter of 0.8mm and a length of 4.5mm. The "particle bin" is part of the particle implantation tool. The particles inside are arranged in a specific way and can be pushed out one by one. The design here is a ring-shaped particle bin structure. In response to the needs of particle implantation, 100 particles or even more particles need to be installed at a time.

[0005] At present, the particle magazines generally used in conjunction with surgery are arranged in a straight line and in a linear manner, and the radioactive particles loaded are relatively small. If one magazine is to be used for one surgery, the straight line needs to be lengthened, which is inconvenient to use.

[0006] Chinese patent CN216456567U discloses a radioactive particle storage module, in which radioactive particles are arranged in an annular groove, which can greatly increase the number of radioactive particles; however, it is not explained how the particles are loaded and how they are kept in a stable state in the annular groove, and the actual structure cannot do so; at the same time, as the number of particles increases, the force of the torsion spring on the last particle of the toggle structure becomes greater and greater, which may cause the particle to deform, and the squeezing between the particles may also cause the particles to be discharged unsmoothly; the last particle may fall at the channel mouth before being loaded into the equipment for use.

[0007] Chinese patent CN205127112U discloses a scroll spring type radioactive particle clip, in which the radioactive particles are located in the spiral groove of the particle tray, one end faces the particle outlet channel, and the rear sliding pin of one end is connected to the slider to slide on the rotating guide plate, the middle of the rotating guide plate is fixed to the central axis, the middle groove of the central axis is connected to the inner ring of the coil spring, the bottom can rotate in the particle tray countersunk hole, and the outer ring of the coil spring is fixed to the particle tray groove. However, it does not disclose the specific structure of loading particles, nor does it disclose the structure of limiting the particles in the annular channel. Utility Model Content

[0008] The utility model aims to provide a radioactive source feeding device, which is convenient for loading and pushing radioactive particles.

[0009] Based on the above problems, the technical solution provided by the utility model is:

[0010] The radioactive source feeding device comprises:

[0011] a base having an annular channel for storing particles, the annular channel having a particle channel;

[0012] A particle filling ring mechanism, comprising a particle filling ring that is rotatably arranged on the base and is used to push particles at the particle channel into the annular channel, and a particle blocking sheet assembly that is linked with the particle filling ring and is used to block particles in the annular channel, wherein when the particle filling ring is rotated to move away from the particle channel, the particle blocking sheet assembly retreats to make way for the annular channel, and when the particle filling ring is rotated to move closer to the particle channel, the particle blocking sheet advances to block the annular channel;

[0013] A particle push ring mechanism, comprising a particle push ring seat assembly rotatably arranged on the base and a particle push ring installed on the particle push ring seat assembly, wherein the particle push ring has a tendency to approach the particle channel under the drive of the particle push ring seat, and the particle push ring and the particle blocking sheet assembly keep a plurality of particles in the annular channel;

[0014] A particle shielding cover is connected to the base and forms a receiving cavity for receiving the particle filling ring mechanism and the particle pushing ring mechanism with the base. The particle shielding cover is provided with a particle pushing channel corresponding to the particle channel.

[0015] In some embodiments, the particle loading ring includes a rotating part rotatably connected to the base, a toggle part arranged on one side of the rotating part, and a particle loading arm arranged on the other side of the rotating part and a linkage part cooperating with the particle blocking sheet assembly;

[0016] When the particle loading arm is driven away from the particle passage by the toggle part, the linkage part drives the particle blocking sheet assembly away from the particle passage to make way for the annular passage;

[0017] When the particle loading arm is driven to approach the particle channel by the toggle portion, the linkage portion is separated from the particle blocking sheet assembly, and the particle blocking sheet assembly is reset to block the annular channel.

[0018] In some of the embodiments, the particle blocking sheet assembly includes a particle blocking seat fixed on the base, a particle blocking sheet slidably cooperated with the particle blocking seat, and at least one reset component arranged between the particle blocking sheet and the particle blocking seat, an escape opening for the particle loading arm to pass through is provided on one end of the particle blocking sheet close to the annular channel, and a linkage shaft cooperating with the linkage part is provided on one end of the particle blocking sheet away from the annular channel.

[0019] In some of the embodiments, the particle blocking seat is provided with a limiting column matched with the reset component, and the particle blocking sheet is provided with a limiting groove matched with the reset component.

[0020] In some of the embodiments, a plurality of rolling components are provided between the particle blocking sheet and the particle blocking seat.

[0021] In some embodiments, the particle blocking sheet assembly includes a particle pulling sheet and a spring sheet connected to the particle pulling sheet, the spring sheet is fixed on the base, the particle pulling sheet is provided with a through hole at one end close to the annular channel for the particle loading arm to pass through, and the particle pulling sheet is provided with a linkage rod cooperating with the linkage part at one end away from the annular channel.

[0022] In some of the embodiments, the base is provided with a support shaft for rotatably supporting the particle loading ring, the particle push ring seat assembly includes a particle push ring seat rotatably cooperated with the support shaft and a clockwork spring arranged between the particle push ring seat and the support shaft, the particle push ring is fixed to one end of the particle push ring seat close to the annular channel, and the particle push ring has a tendency to approach the particle channel when driven by the clockwork spring.

[0023] In some of the embodiments, the particle loading ring is supported on the support shaft via a first bearing component, the particle pushing ring seat is supported on the support shaft via a second bearing component, a first sleeve is provided between the particle pushing ring seat and the particle loading ring, and a second sleeve is provided between the particle pushing ring seat and the clockwork spring.

[0024] In some of the embodiments, a blocking piece pin assembly is provided on the base for limiting the particle blocking piece assembly in a retreated position.

[0025] In some embodiments, the particle channel is connected to a particle push pin channel assembly, which includes a push pin joint connected to the particle channel, a butt joint connected to the push pin joint, and an elastic member arranged between the push pin joint and the butt joint, a limiting step is provided on the push pin joint, and the elastic member is sleeved on the limiting step and abuts against the tail of the particle push pin.

[0026] Compared with the prior art, the advantages of the utility model are:

[0027] The loading and pushing of radioactive particles are realized by the cooperation of the particle filling ring mechanism and the particle pushing ring mechanism. When the particle filling ring is rotated to make it away from the particle channel, the particle blocking sheet assembly retreats to make way for the annular channel. At this time, the particle pushing ring can move toward the particle channel. When the particle filling ring is rotated to make it close to the particle channel, the particle blocking sheet assembly advances to block the annular channel. The particle blocking sheet assembly and the particle pushing ring can keep multiple particles in the annular channel. By turning the particle filling ring, the annular channel can be opened so that the particle pushing ring can push multiple particles to the particle channel in sequence, and then push the particles to the lesion through the particle pushing needle. The annular particle warehouse has a simple structure and is easy to operate, which improves the efficiency and safety of the operation. At the same time, compared with other solutions, the particle loading and pushing are smoother and the movements are more delicate, ensuring the reliable completion of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of Embodiment 1 of the radioactive source feeding device of the utility model;

[0030] Figure 2 This is one of the disassembled structural schematic diagrams of Embodiment 1 of the present utility model;

[0031] Figure 3 This is the second disassembled structural diagram of Embodiment 1 of the present utility model;

[0032] Figure 4 This is one of the cross-sectional structural schematic diagrams of Example 1 of the utility model;

[0033] Figure 5 This is the second schematic cross-sectional structure diagram of Embodiment 1 of the present utility model;

[0034] Figure 6This is a schematic diagram of the structure of the particle filling ring mechanism and the base in Example 1 of the utility model;

[0035] Figure 7 This is a schematic diagram of the structure of the particle filling ring in Example 1 of the utility model;

[0036] Figure 8 This is a schematic diagram of the structure of the particle blocking sheet assembly in Example 1 of the utility model;

[0037] Fig. 9 This is a schematic diagram of the structure of the particle push ring mechanism in Example 1 of the utility model;

[0038] Fig.10 This is a schematic diagram of the matching structure of the particle filling ring and the particle pushing ring in Example 1 of the utility model;

[0039] Fig.11 This is a schematic diagram of the structure of Example 1 of the utility model in the initial loading state;

[0040] Fig.12 This is a structural schematic diagram of Example 1 of the utility model in a loading preparation state;

[0041] Fig.13 This is a schematic diagram of the state in which particles reach the particle channel in Example 1 of the utility model;

[0042] Fig.14 It is a schematic diagram of the state structure of the particle pushing and encircling the particle when the particle blocking sheet retreats in Example 1 of the utility model;

[0043] Fig.15 This is a schematic diagram of the structure of the granular loading arm pushing particles in Example 1 of the utility model;

[0044] Fig.16 This is a schematic diagram of the structure of the particle blocking sheet in the reset state after the particles are loaded in place in Example 1 of the utility model;

[0045] Fig.17 This is a schematic diagram of the structure of the second particles in the first embodiment of the utility model in the state of preparing to load;

[0046] Fig.18 This is a schematic diagram of the structure of the particle filled state in Example 1 of the utility model;

[0047] Fig.19 This is a schematic diagram of the state structure in which the particle-blocking sheet retreats and the particle-pushing ring pushes the particles into the particle channel in Embodiment 1 of the utility model;

[0048] Fig. 20 This is a schematic diagram of the last particle pushing state structure in Example 1 of the utility model;

[0049] Fig.21This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0050] Fig. 22 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0051] in:

[0052] 1. Base; 1-1. Annular channel; 1-2. Particle channel; 1-3. Support shaft; 1-4. Particle blocking block;

[0053] 2. Particle filling ring mechanism; 2-1. Particle filling ring; 2-1a. Rotating part; 2-1b. Toggle part; 2-1c. Particle filling arm; 2-1d. Linkage part; 2-2. Particle blocking sheet assembly; 2-2a. Particle blocking seat; 2-2a1. Limiting column; 2-2a2. First slide groove; 2-2b. Particle blocking sheet; 2-2b1. Second slide groove; 2-2b2. Avoidance; 2-2c. Reset component; 2-2d. Linkage shaft; 2-2e. Rolling component; 2-2f. Particle pulling sheet; 2-2f1. Linkage rod; 2-2g. Reed; 2-3. Toggle rod; 2-4. Filling bearing; 2-5. Third sleeve;

[0054] 3. Particle push ring mechanism; 3-1. Particle push ring seat; 3-2. Particle push ring; 3-2a. Fixing part; 3-2b. Pushing part; 3-3. Clockwork spring;

[0055] 4. Particle shielding cover; 4-1. Particle pushing channel;

[0056] 5. Particles;

[0057] 6. Particle push pin channel assembly; 6-1. Push pin connector; 6-2. Butt connector; 6-3. Elastic member;

[0058] 7. A first bearing component;

[0059] 8. A second bearing component;

[0060] 9. The first sleeve;

[0061] 10. Second bushing;

[0062] 11. Circlip;

[0063] 12. baffle pin assembly; 12-1. mounting seat; 12-2. baffle pin. DETAILED DESCRIPTION

[0064] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0065] like Figures 1 to 5 As shown, it is the embodiment 1 of the utility model, which provides a radioactive source feeding device, including a base 1, a particle filling ring mechanism 2, a particle pushing ring mechanism 3 and a particle shielding cover 4. An annular channel 1-1 for storing particles 5 is provided in the base 1, and the annular channel 1-1 is arranged along the circumference of the base 1 and has a particle channel 1-2. A particle blocking block 1-4 for limiting the particles 5 is provided at the position of the particle channel 1-2. When loading particles 5, the particles 5 are placed through the particle channel 1-2 and are limited at the position of the particle channel 1-2 by the particle blocking block 1-4.

[0066] like Figure 6 and Figure 7 As shown, the particle filling ring mechanism 2 includes a particle filling ring 2-1 rotatably arranged on the base 1 for pushing the particles 5 at the particle channel 1-2 into the annular channel 1-1, and a particle blocking sheet assembly 2-2 which is linked with the particle filling ring 2-1 to block the particles 5 in the annular channel 1-1. When the particle filling ring 2-1 is rotated to move away from the particle channel 1-2, the particle blocking sheet assembly 2-2 retreats to make way for the annular channel 1-1; when the particle filling ring 2-1 is rotated to move close to the particle channel 1-2, the particle blocking sheet assembly 2-2 moves forward to block the annular channel 1-1.

[0067] Specifically, the particle loading ring 2-1 includes a rotating part 2-1a rotatably connected to the base 1, a toggle part 2-1b arranged on one side of the rotating part 2-1a, and a particle loading arm 2-1c arranged on the other side of the rotating part 2-1a and a linkage part 2-1d cooperating with the particle blocking sheet assembly 2-2. When the particle loading arm 2-1c is driven away from the particle channel 1-2 by the toggle part 2-1b, the linkage part 2-1d drives the particle blocking sheet assembly 2-2 away from the particle channel 1-2 to make way for the annular channel 1-1; when the particle loading arm 2-1c is driven close to the particle channel 1-2 by the toggle part 2-1b, the linkage part 2-1d disengages from the particle blocking sheet assembly 2-2, and the particle blocking sheet assembly 2-2 is reset to block the annular channel 1-1.

[0068] In order to facilitate the installation of the particle loading ring 2 - 1 , a support shaft 1 - 3 is provided on the base 1 , and the rotating part 2 - 1 a is rotatably supported on the support shaft 1 - 3 via a first bearing component 7 .

[0069] In order to facilitate the operation of the particle loading ring 2-1, the toggle part 2-1b is connected to a toggle rod 2-3, which extends outside the base 1. A loading bearing 2-4 that cooperates with a particle loading device (not shown) is provided on the toggle rod 2-3, and a third sleeve 2-5 is provided between the loading bearing 2-4 and the toggle part 2-1b.

[0070] like Figure 8As shown, the particle blocking sheet assembly 2-2 includes a particle blocking seat 2-2a fixed on the base 1, a particle blocking sheet 2-2b slidably matched with the particle blocking seat 2-2a, and at least one reset component 2-2c arranged between the particle blocking sheet 2-2b and the particle blocking seat 2-2a, and an escape opening 2-2b2 for the particle loading arm 2-1c to pass through is arranged at one end of the particle blocking sheet 2-2b close to the annular channel 1-1, and a linkage shaft 2-2d matched with the linkage part 2-1d is arranged at one end of the particle blocking sheet 2-2b away from the annular channel 1-1. Among them, the reset component 2-2c is a spring.

[0071] In this example, the particle loading arm 2-1c and the linkage part 2-1d are both extended outward from the rotating part 2-1a and are respectively arranged on both sides of the linkage shaft 2-2d. The particle loading arm 2-1c is moved away from the particle channel 1-2 through the toggle part 2-1b, and the linkage part 2-1d pulls the linkage shaft 2-2d to make the particle blocking sheet assembly 2-2 retreat. The toggle part 2-1b makes the particle loading arm 2-1c approach the particle channel 1-2, and the linkage part 2-1d is disengaged from the linkage shaft 2-2d. The particle blocking sheet 2-2b is reset under the action of the reset part 2-2c and blocks the annular channel 1-1.

[0072] In order to improve the stability of the structure, a limiting column 2-2a1 cooperating with the reset component 2-2c is provided on the particle blocking seat 2-2a, and a limiting groove matching the reset component 2-2c is provided on the particle blocking sheet 2-2b. One end of the reset component 2-2c is sleeved on the limiting column 2-2a1 and the other end abuts against the limiting groove.

[0073] In order to facilitate the sliding cooperation between the particle blocking sheet 2-2b and the particle blocking seat 2-2a, a plurality of rolling components 2-2e are provided between the particle blocking sheet 2-2b and the particle blocking seat 2-2a. Preferably, the rolling components 2-2e can be ceramic balls. Specifically, a first chute 2-2a2 for inserting the rolling components 2-2e is provided on both sides of the particle blocking seat 2-2a, and a second chute 2-2b1 for inserting the rolling components 2-2e is provided on both sides of the particle blocking sheet 2-2b. Two rolling components 2-2e are provided between the first chute 2-2a2 and the corresponding second chute 2-2b1. When the particle blocking sheet 2-2b slides relative to the particle blocking seat 2-2a, the rolling components 2-2e can roll in the first chute 2-2a2 and the second chute 2-2b1 to reduce the friction between the particle blocking sheet 2-2b and the particle blocking seat 2-2a.

[0074] like Fig. 9 and Fig.10As shown, the particle pushing ring mechanism 3 includes a particle pushing ring seat assembly rotatably arranged on the base 1 and a particle pushing ring 3-2 installed on the particle pushing ring seat assembly. The particle pushing ring 3-2 has a tendency to approach the particle channel 1-2 when driven by the particle pushing ring seat assembly. The particle pushing ring 3-2 and the particle blocking sheet assembly 2-2 keep a number of particles 5 in the annular channel 1-1.

[0075] In order to facilitate the stable confinement of the particle 5, a first arc-shaped groove matching the particle 5 is provided on the particle loading arm 2-1c, and a second arc-shaped groove matching the particle 5 is provided on the particle pushing ring 3-2.

[0076] Specifically, the particle push ring seat assembly includes a particle push ring seat 3-1 that is rotatably matched with the support shaft 1-3 and a clockwork spring 3-3 arranged between the particle push ring seat 3-1 and the support shaft 1-3, one end of the clockwork spring 3-3 is clamped on the support shaft 1-3 and the other end is clamped on the particle push ring seat 3-1, the particle push ring 3-2 is fixed to the end of the particle push ring seat 3-1 close to the annular channel 1-1 by screws, and the particle push ring 3-2 has a tendency to approach the particle channel 1-2 under the drive of the clockwork spring 3-3, the particle push ring seat 3-1 is supported on the support shaft 1-3 via a second bearing component 8, a first sleeve 9 is provided between the particle push ring seat 3-1 and the particle filling ring 2-1, and a second sleeve 10 is provided between the particle push ring seat 3-1 and the clockwork spring 3-3, wherein the second sleeve 10 is limited on the support shaft 1-3 by a retaining spring 11. The particle pushing ring 3-2 includes a fixing portion 3-2a and a pushing portion 3-2b, wherein the pushing portion 3-2b cooperates with the annular channel 1-1 and can slide in the annular channel 1-1.

[0077] When it is necessary to push the radioactive particles 5 to the lesion, the particle blocking sheet assembly 2-2 is in a retreat state, and the particle pushing ring 3-2 pushes the particles 5 in the annular channel 1-1 to the particle channel 1-2 position. In order to facilitate the smooth progress of the operation, a blocking sheet pin assembly 12 for limiting the particle blocking sheet assembly 2-2 in the retreat position is provided on the base 1. The blocking sheet pin assembly 12 includes a mounting seat 12-1 fixedly connected to the base 1 and a blocking sheet pin 12-2 inserted in the mounting seat 12-1. The blocking sheet pin 12-2 extends through the base 1 into the positioning groove on the particle blocking sheet 2-2b to limit the particle blocking sheet 2-2b in the retreat position.

[0078] In order to facilitate the installation of the particle push needle so as to push the particles 5 to the patient's lesions, a particle push needle channel assembly 6 is connected to the particle channel 1-2. Specifically, the particle push needle channel assembly 6 includes a push needle connector 6-1 connected to the particle channel 1-2, a docking connector 6-2 connected to the push needle connector 6-1, and an elastic member 6-3 arranged between the push needle connector 6-1 and the docking connector 6-2. A limiting step is provided on the push needle connector 6-1. The elastic member 6-3 is sleeved on the limiting step and abuts against the tail of the particle push needle, so that the particle push needle is stably fixed to prevent loosening.

[0079] like Fig.21 As shown, it is a structural schematic diagram of Example 2 of the utility model. The rest is the same as Example 1, except that: the structure of the particle blocking sheet assembly 2-2 is different, specifically, the particle blocking sheet assembly 2-2 includes a pulling particle sheet 2-2f and a spring sheet 2-2g connected to the pulling particle sheet 2-2f, wherein one end of the spring sheet 2-2g is fixed on the base 1 and the other end is fixedly connected to the pulling particle sheet 2-2f, a through hole for the particle loading arm 2-1c to pass through is provided at the end of the pulling particle sheet 2-2f close to the annular channel 1-1, and a linkage rod 2-2f1 cooperating with the linkage part 2-1d is provided at the end of the pulling particle sheet 2-2f away from the annular channel 1-1.

[0080] like Fig. 22 As shown, it is a structural schematic diagram of Example 3 of the utility model. The rest is the same as Example 1, except that: the structure of the particle blocking sheet assembly 2-2 is different. Specifically, the particle loading arm 2-2c is fixed on one side of the rotating part 2-2a, and the linkage part 2-1d is fixed on the particle loading arm 2-2c and is located on the same side of the linkage shaft 2-2d as the particle loading arm 2-2c.

[0081] The working principle of the utility model is:

[0082] Particle loading process:

[0083] like Fig.11 and Fig.12As shown, before filling the annular channel 1-1, confirm whether there are still foreign objects in the entire channel after cleaning and sterilization, and use the toggle part 2-1b to toggle the particle filling ring 2-1 to make the particle filling arm 2-1c away from the particle channel 1-2. The linkage part 2-1d drives the particle blocking sheet assembly 2-2 to retreat and make way for the annular channel 1-1. The particle push ring 3-2 is driven by the clockwork spring 3-3 to approach the particle channel 1-2 and half-block the particle channel 1-2. The particle filling ring 2-1 is toggled by the toggle part 2-1b to make the particle filling arm 2-1c away from the particle channel 1-2. The particle loading arm 2-1c approaches the particle channel 1-2 and turns past the particle blocking sheet assembly 2-2 before entering the annular channel 1-1. The particle blocking sheet assembly 2-2 is reset to block the annular channel 1-1. The particle loading arm 2-1c is again approached to the particle channel 1-2 and stopped by the toggle portion 2-1b. The clockwork spring 3-3 pushes the particle push ring 3-2 to stop at the position of the particle blocking sheet assembly 2-2. At this time, it indicates that the internal structure of the particle annular clip meets the requirements of the entire particle clip loading action, and the clip can be loaded.

[0084] like Figures 13 to 18 As shown, the annular channel 1-1 is docked with the particle filling device, and the particle filling device delivers the new particle 5 into place, and the particle filling arm 2-1c is driven away from the particle channel 1-2 by the toggle part 2-1b, and the linkage part 2-1d drives the particle blocking sheet assembly 2-2 to retreat and make way for the annular channel 1-1. At this time, the particle push ring 3-2 holds the particle 5 under the action of the spring spring 3-3, and drives the particle filling arm 3-1c to approach the particle channel 1-2 through the toggle part 2-1b to push the particle 5 into the annular channel 1-1, and the particle blocking sheet assembly 2-2 is reset and passes through the particle filling arm 2-1c to block the annular channel 1-1 and block the particle 5 in the annular channel 1-1. In this cycle, all particles 5 are loaded into the annular channel 1-1.

[0085] Particle pushing process:

[0086] like Fig.19 and Fig. 20As shown, the particle push needle channel assembly 6 is installed on the base 1, and the particle loading arm 2-1c is driven away from the particle channel 1-2 by the toggle part 2-1b, and the particle blocking sheet 2-2b retreats, and the particle push ring 3-2 pushes the particle 5 to the particle channel 1-2 position in sequence. After the puncture needle that was docked before the execution tool docking is displayed on the main control system (confirm that the inner needle of the puncture needle has been removed before docking), the execution tool starts the push needle according to the command, and the push needle moves downward along the particle channel 1-2 under the drive of the power device, and after reaching the top of the particle 5, it presses against the particle 5, and pushes the particle 5 in the particle channel 1-2 to the puncture needle until the radioactive particle 5 is pushed to 5mm away from the puncture needle tip, and the mechanical arm drives the puncture needle to retreat, and the push needle continues to push 5mm, and the particle 5 is ejected from the puncture needle and remains in the diseased tissue of the patient. When the push needle retreats through the puncture needle to the annular channel 1-1 to leave the channel, the next radioactive particle 5 arrives in the particle channel 1-2 under the push of the particle push ring 3-2, waiting for the next push. The process is repeated repeatedly until the particle implantation robot navigation system completes the operation according to the operation plan, that is, the delivery of the radioactive particles 5 is completed.

[0087] In summary, the radioactive source feeding device facilitates the loading and pushing of radioactive particles, is easy to operate, can reduce damage to particles, and improves surgical safety and efficiency. The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and cannot be used to limit the protection scope of the utility model. Any equivalent transformation or modification made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A radioactive source feeding device, characterized in that: include: a base having an annular channel for storing particles, the annular channel having a particle channel; A particle filling ring mechanism, comprising a particle filling ring that is rotatably arranged on the base to push particles at the particle channel into the annular channel, and a particle blocking sheet assembly that is linked with the particle filling ring to block particles in the annular channel, wherein when the particle filling ring is rotated to move away from the particle channel, the particle blocking sheet assembly retreats to make way for the annular channel, and when the particle filling ring is rotated to move closer to the particle channel, the particle blocking sheet assembly advances to block the annular channel; A particle push ring mechanism, comprising a particle push ring seat assembly rotatably arranged on the base and a particle push ring installed on the particle push ring seat assembly, wherein the particle push ring has a tendency to approach the particle channel under the drive of the particle push ring seat, and the particle push ring and the particle blocking sheet assembly keep a plurality of particles in the annular channel; A particle shielding cover is connected to the base and forms a receiving cavity for receiving the particle filling ring mechanism and the particle pushing ring mechanism with the base. The particle shielding cover is provided with a particle pushing channel corresponding to the particle channel.

2. The radiation source feeding device according to claim 1, characterized in that: The particle loading ring comprises a rotating part rotatably connected to the base, a toggle part arranged on one side of the rotating part, and a particle loading arm arranged on the other side of the rotating part and a linkage part cooperating with the particle blocking sheet assembly; When the particle loading arm is driven away from the particle passage by the toggle part, the linkage part drives the particle blocking sheet assembly away from the particle passage to make way for the annular passage; When the particle loading arm is driven to approach the particle channel by the toggle portion, the linkage portion is separated from the particle blocking sheet assembly, and the particle blocking sheet assembly is reset to block the annular channel.

3. The radiation source feeding device according to claim 2, characterized in that: The particle blocking sheet assembly includes a particle blocking seat fixed on the base, a particle blocking sheet slidably matched with the particle blocking seat, and at least one reset component arranged between the particle blocking sheet and the particle blocking seat, an escape opening for the particle loading arm to pass through is provided on one end of the particle blocking sheet close to the annular channel, and a linkage shaft matched with the linkage part is provided on one end of the particle blocking sheet away from the annular channel.

4. The radiation source feeding device according to claim 3, characterized in that: The particle blocking seat is provided with a limiting column matched with the reset component, and the particle blocking sheet is provided with a limiting groove matched with the reset component.

5. The radiation source feeding device according to claim 3, characterized in that: A plurality of rolling components are arranged between the particle blocking sheet and the particle blocking seat.

6. The radiation source feeding device according to claim 2, characterized in that: The particle blocking sheet assembly includes a particle pulling sheet and a spring sheet connected to the particle pulling sheet, the spring sheet is fixed on the base, the particle pulling sheet is provided with a through hole for the particle loading arm to pass through at one end close to the annular channel, and the particle pulling sheet is provided with a linkage rod cooperating with the linkage part at one end away from the annular channel.

7. The radiation source feeding device according to claim 1, characterized in that: The base is provided with a support shaft for rotatably supporting the particle filling ring, the particle pushing ring seat assembly includes a particle pushing ring seat rotatably matched with the support shaft and a clockwork spring arranged between the particle pushing ring seat and the support shaft, the particle push ring is fixed to one end of the particle pushing ring seat close to the annular channel, and the particle push ring has a tendency to approach the particle channel when driven by the clockwork spring.

8. The radiation source feeding device according to claim 7, characterized in that: The particle filling ring is supported on the support shaft via a first bearing component, the particle pushing ring seat is supported on the support shaft via a second bearing component, a first sleeve is provided between the particle pushing ring seat and the particle filling ring, and a second sleeve is provided between the particle pushing ring seat and the clockwork spring.

9. The radiation source feeding device according to claim 1, characterized in that: The base is provided with a blocking piece pin assembly for limiting the particle blocking piece assembly at a retreated position.

10. The radiation source feeding device according to any one of claims 1 to 9, characterized in that: The particle channel is connected to a particle push pin channel assembly, which includes a push pin joint connected to the particle channel, a butt joint connected to the push pin joint, and an elastic member arranged between the push pin joint and the butt joint. A limiting step is provided on the push pin joint, and the elastic member is sleeved on the limiting step and abuts against the tail of the particle push pin.

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