Radiopharmaceutical injection protection structure

Abstract

The application provides a radioactive medicine injection protection structure, which comprises a base, a first protection mechanism and a second protection mechanism; the first protection mechanism comprises a sliding plate, a pressing block, a spring and a fixing mechanism; and the second protection mechanism comprises a semicircular sleeve and a transmission mechanism. When the syringe falls, the reaction force of the spring moves the pressing block away from the syringe, the movement of the pressing block away from the syringe can fix the sliding plate through the fixing mechanism, thereby fixing the push rod, and the transmission mechanism drives two groups of semicircular sleeves to close and cover the needle, thereby automatically protecting the needle and fixing the push rod, avoiding the radioactive medicine in the syringe from spilling out, effectively preventing the leakage of radioactive substances, avoiding the waste of medicine and secondary radiation pollution, reducing the safety hazard, and in the movement process of the syringe, the pressure of the pressing block on the needle and the push rod can be automatically cancelled, avoiding the spilling of the radioactive medicine due to the shaking caused by the movement.

Description

Technical Field

[0001] This invention specifically relates to a protective structure for radiopharmaceutical injection. Background Technology

[0002] The Department of Nuclear Medicine is a clinical department that integrates nuclear technology and medicine by using radioactive nuclides. It focuses on functional imaging and targeted therapy, and can accurately detect organ function and locate lesions. It can also carry out radionuclide targeted therapy for tumors, bone metastases, etc., providing key evidence for clinical diagnosis and treatment.

[0003] In nuclear medicine diagnosis and treatment, radiopharmaceutical injection is one of the core procedures. Medical staff must use syringes to accurately inject radiopharmaceuticals into the patient's body. The standardization and safety of this procedure directly affect the safety of the operators, the patient's treatment outcome, the smoothness of the workflow, and the control of medical costs. However, many syringes in existing technology have the drawback of simple structure. If the syringe is accidentally dropped during the injection or aspiration process, it can easily damage the needle or cause the injector to be impacted, resulting in the spillage of radiopharmaceuticals and potentially leading to radioactive material leakage. This poses a significant safety hazard, the specific impacts of which are mainly reflected in the following aspects: From the perspective of operator safety, radiopharmaceutical leaks directly increase the risk of internal and external radiation exposure for medical staff, seriously threatening their radiation safety. From the perspective of patient treatment outcomes, once the drug is spilled, the actual activity injected into the patient's body will be lower than the prescribed dose, which may not only affect image quality but also cause examination failure and require re-examination, thus subjecting the patient to additional radiation and prolonging waiting time. From the perspective of workflow and environmental safety, after a leak occurs, operators need to invest a lot of time in contamination monitoring, table decontamination, and radioactive solid and liquid waste disposal, which is cumbersome and significantly increases medical costs. At the same time, if the injection area is close to a SPECT or PET / CT scanner, the leaked drug may also contaminate the examination table and the machine room environment, causing the equipment to shut down due to contamination alarms, affecting the work progress of the entire department. If the cleanup is not thorough, it will also adversely affect the image quality of the next patient. From the perspective of medical cost control, radiopharmaceuticals are expensive, have a short half-life, and cannot be replenished. Once a leak occurs, it will cause direct economic losses. In summary, to address the technical problems of easy spillage and significant safety hazards of radiopharmaceuticals in existing syringes, a radiopharmaceutical injection protection structure is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a radioactive drug injection protection structure that automatically protects the needle and secures the plunger when the syringe is dropped, preventing the radioactive drug inside the syringe from spilling out. This effectively prevents radioactive material leakage, avoids drug waste and secondary radiation pollution, and reduces safety hazards.

[0005] A radiopharmaceutical injection protective structure, comprising: The base is located around the syringe. The first protective mechanism includes a sliding plate, a pressure block, a spring, and a fixing mechanism. The sliding plate is slidably mounted on the base along the axial direction of the syringe, and one end is engaged with the plunger in the syringe. The pressure block is slidably mounted on the other end of the sliding plate along the radial direction of the syringe. The spring connects the sliding plate and the pressure block, providing a thrust to the pressure block to move away from the syringe. The fixing mechanism is mounted on the sliding plate and connected to the base and the pressure block, used to fix or release the sliding plate when the pressure block moves away from or towards the syringe. The second protective mechanism includes a semi-circular sleeve and a transmission mechanism. Two sets of openable and closable semi-circular sleeves are hinged to one end of the base. The opening and closing of the two sets of semi-circular sleeves can open or cover the needle of the syringe. The transmission mechanism connects the pressure block and the two sets of semi-circular sleeves and is used to drive the two sets of semi-circular sleeves to open and close when the pressure block moves closer to or away from the syringe.

[0006] In one embodiment, the base is provided with an array of multiple sets of open retaining rings, and the syringe is fixedly engaged within the multiple sets of open retaining rings.

[0007] In one embodiment, the fixing mechanism includes a fixing block and a first transmission component. Two sets of the fixing blocks are slidably disposed on the top of the slide plate. Multiple sets of fixing slots are arrayed along the axial direction of the syringe on both sides of the base. The two sets of fixing blocks can be inserted into or removed from the fixing slots when they move away from or closer to each other. The first transmission component connects the pressure block and the two sets of fixing blocks and is used to drive the two sets of fixing blocks to move away from or closer to each other when the pressure block moves away from or closer to the syringe.

[0008] In one embodiment, a V-shaped guide groove with its tip facing away from the syringe is provided on one side of the pressure block, and guide rods are provided at the opposite ends of the two sets of fixing blocks, with the two sets of guide rods slidably disposed at both ends of the V-shaped guide groove.

[0009] In one embodiment, the first protective mechanism further includes a connecting rod and an adjusting component; the connecting rod is slidably disposed on the slide plate along the axial direction of the syringe, one end of the slide plate is snapped into connection with the push rod, and the adjusting component connects the slide plate and the connecting rod for driving the connecting rod to slide.

[0010] In one embodiment, the adjusting assembly includes a screw; one end of the slide plate has a groove, the connecting rod slides through the groove along the axial direction of the syringe, the screw is arranged along the axial direction of the syringe and is rotatably disposed in the groove and threadedly connected to the connecting rod.

[0011] In one embodiment, the transmission mechanism includes a pressure plate, a worm gear and a worm, and a second transmission assembly. The pressure plate is slidably disposed on the base along the radial direction of the syringe and located below the slide plate. The bottom end of the pressure block is slidably disposed on the top end of the pressure plate along the axial direction of the syringe. The worm gears are coaxially disposed at the hinge joints of the two sets of semicircular sleeves. Two sets of worms are disposed opposite to each other at one end of the base. The helical lines of the two sets of worms are opposite and they mesh with the two sets of worm gears respectively. The second transmission assembly connects the pressure plate and the two sets of worms to convert the movement of the pressure plate into the synchronous rotation of the two sets of worms.

[0012] In one embodiment, the second transmission component includes gears and racks; the gears are coaxially arranged at the opposite ends of the two sets of worm gears, and the racks are arranged opposite to each other on the pressure plate, with the two sets of racks meshing with the two sets of gears respectively.

[0013] In one embodiment, when the two sets of semicircular sleeves are closed to cover the needle head, the two sets of semicircular sleeves are in sealed contact on opposite sides and the ends away from the syringe are closed.

[0014] In one embodiment, the inner sides of both sets of semicircular sleeves are provided with sponge pads that elastically contact the needle tip.

[0015] The aforementioned radiopharmaceutical injection protective structure includes at least the following beneficial effects: By pressing the pressure block and moving it closer to the syringe, the fixing mechanism releases the slide plate. A transmission mechanism then drives two sets of semi-circular sleeves to open and expose the needle. At this point, the pressure block drives the slide plate, which in turn moves the push rod to draw or inject medication. When the syringe falls, the pressure on the pressure block disappears, and the spring's reaction force moves the pressure block away from the syringe. This movement of the pressure block then fixes the slide plate in place, thus securing the push rod. The transmission mechanism then drives the two sets of semi-circular sleeves to close and cover the needle. This automatically protects the needle and secures the push rod when the syringe falls, preventing the radioactive drug from spilling out. This effectively prevents radioactive material leakage, avoids drug waste and secondary radiation pollution, and reduces safety hazards. Furthermore, during syringe movement, the pressure on the pressure block can be automatically released to protect the needle and secure the push rod, preventing radioactive drug spillage due to movement. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a three-dimensional structural diagram of a radiopharmaceutical injection protective structure provided in an embodiment of the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of another state of a radiopharmaceutical injection protective structure is shown. Figure 3 for Figure 1 An exploded view of a radiopharmaceutical injection protective structure is shown. Figure 4 for Figure 1 An exploded view of the first protective mechanism in a radiopharmaceutical injection protective structure. Figure 5 for Figure 1 An exploded view of the second protective mechanism in a radiopharmaceutical injection protective structure. Figure 6 for Figure 1 An exploded view of a semi-circular sleeve in a radiopharmaceutical injection protective structure. Figure 7 for Figure 1 The diagram shows a three-dimensional structure of a protective structure for radiopharmaceutical injection after partial cross-section of the sliding plate.

[0018] Figure label: 1. Syringe; 11. plunger; 12. needle; 10. Base; 101. Open retaining ring; 102. Fixing groove; 103. First limiting groove; 104. Third limiting groove; 20. Slide plate; 201. Pressure block; 2011. Anti-slip groove; 202. Spring; 203. Fixing block; 2031. Guide rod; 204. V-shaped guide groove; 205. Connecting rod; 2051. Slot; 206. Screw; 2061. Knob; 207. Slide groove; 208. Through groove; 209. Second limit groove; 30. Semicircular sleeve; 301. Pressure plate; 3011. T-shaped slide groove; 302. Worm gear; 303. Worm; 304. Gear; 305. Rack; 306. Sponge pad. Detailed Implementation

[0019] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0020] Please see Figures 1 to 3A radiopharmaceutical injection protective structure according to one embodiment includes a base 10, a first protective mechanism, and a second protective mechanism. The base 10 is disposed around the periphery of a syringe 1. The first protective mechanism includes a sliding plate 20, a pressure block 201, a spring 202, and a fixing mechanism. The sliding plate 20 is slidably disposed on the base 10 along the axial direction of the syringe 1, and one end is engaged with a push rod 11 in the syringe 1. The pressure block 201 is slidably disposed at the other end of the sliding plate 20 along the radial direction of the syringe 1. The spring 202 connects the sliding plate 20 and the pressure block 201, providing a pushing force to the pressure block 201 to move away from the syringe 1. The fixing mechanism is disposed on the sliding plate 20 and connected to the base 10 and the pressure block 201, used to fix or release the sliding plate 20 when the pressure block 201 moves away from or closer to the syringe 1. The second protective mechanism includes a semi-circular sleeve 30 and a transmission mechanism. Two sets of openable and closable semi-circular sleeves 30 are hinged to one end of the base 10. The opening and closing of the two sets of semi-circular sleeves 30 can open or cover the needle 12 of the syringe 1. The transmission mechanism connects the pressure block 201 and the two sets of semi-circular sleeves 30 and is used to drive the two sets of semi-circular sleeves 30 to open and close when the pressure block 201 moves closer to or further away from the syringe 1.

[0021] In the above embodiment, by holding the base 10 and pressing the pressure block 201 with your fingers, the pressure block 201 moves closer to the syringe 1, thus releasing the fixation of the slide plate 20 through the fixing mechanism. The transmission mechanism drives the two sets of semi-circular sleeves 30 to open and expose the needle 12. At this time, by driving the pressure block 201 with your fingers, the slide plate 20 slides, causing the push rod 11 to move for drug aspiration or injection. This is convenient for one-handed operation. When the syringe 1 falls, the pressure on the pressure block 201 disappears, and the reaction force of the spring 202 causes the pressure block 201 to move away from the syringe 1. The movement of the pressure block 201 away from the syringe 1 releases the fixation of the slide plate 20 through the fixing mechanism. The plate 20 is fixed, thereby fixing the push rod 11. The transmission mechanism drives the two sets of semi-circular sleeves 30 to close and cover the needle 12. In the event that the syringe 1 falls, the needle 12 is automatically protected and the push rod 11 is fixed, preventing the radioactive drug in the syringe 1 from spilling out. This effectively prevents the leakage of radioactive materials, avoids drug waste and secondary radiation pollution, and reduces safety hazards. Furthermore, during the movement of the syringe 1, the pressure on the pressure block 201 can be automatically released to protect the needle 12 and fix the push rod 11, preventing the radioactive drug from spilling due to shaking caused by the movement.

[0022] On the other hand, the device has a spill prevention function, which allows operators to complete the drug drawing and injection operations more focused and smoothly without worrying too much about spillage. This effectively reduces their psychological pressure and is especially suitable for drug injection scenarios with high activity or high operation difficulty.

[0023] Specifically, in the above embodiment, the top of the pressure block 201 is provided with an anti-slip groove 2011. This prevents slippage when pressing or moving the pressure block 201, thus improving the stability of the device operation.

[0024] Please refer to the following: Figure 4 Specifically, in the above embodiment, the base 10 has first limiting grooves 103 on both sides, and the slide plate 20 is slidably disposed in the two sets of first limiting grooves 103 along the axial direction of the syringe 1. The slide plate 20 has a through groove 208, and the bottom end of the pressure block 201 slides radially through the through groove 208 along the syringe 1. This ensures the stability of the sliding of the slide plate 20 and the pressure block 201.

[0025] Please see Figure 3 In one embodiment, the base 10 is provided with an array of multiple sets of open retaining rings 101, and the syringe 1 is snapped and fixed within the multiple sets of open retaining rings 101. The base 10 and the syringe 1 are snap-fit ​​connected, which facilitates repeated use of the device, and the multiple sets of open retaining rings 101 can ensure the stability of the snap-fit ​​connection with the syringe 1, avoiding relative displacement between the syringe 1 and the base 10 during operation. It is understood that when the syringe 1 is snapped and fixed within the multiple sets of open retaining rings 101, the scale lines on the syringe 1 should be fully exposed so as not to affect scale reading.

[0026] Please see Figure 3 and Figure 4 In one embodiment, the fixing mechanism includes fixing blocks 203 and a first transmission assembly. Two sets of fixing blocks 203 are slidably disposed on the top of the slide plate 20. Multiple sets of fixing slots 102 are arrayed along the axial direction of the syringe 1 on both sides of the base 10. The two sets of fixing blocks 203 can be inserted into or removed from the fixing slots 102 by moving away from or closer to each other. The first transmission assembly connects the pressure block 201 and the two sets of fixing blocks 203, and is used to drive the two sets of fixing blocks 203 to move away from or closer to each other when the pressure block 201 moves away from or closer to the syringe 1. Specifically, a V-shaped guide groove 204 with its tip facing away from the syringe 1 is provided on one side of the pressure block 201. Guide rods 2031 are provided at the opposite ends of the two sets of fixing blocks 203, and the two sets of guide rods 2031 are slidably disposed at both ends of the V-shaped guide groove 204.

[0027] In the above embodiment, when the pressure block 201 moves closer to the syringe 1, the pressure block 201 drives the V-shaped guide groove 204 to move. At this time, the V-shaped guide groove 204 cooperates with the two sets of guide rods 2031 to drive the two sets of fixing blocks 203 to move closer to each other and exit from the fixing groove 102, thereby canceling the fixation of the slide plate 20. Conversely, when the pressure block 201 moves away from the syringe 1, the V-shaped guide groove 204 moves in the opposite direction and cooperates with the two sets of guide rods 2031 to drive the two sets of fixing blocks 203 to move away from each other and insert into the fixing groove 102, thereby fixing the slide plate 20. The slide plate 20 can be unfixed or fixed simply by pressing the pressure block 201 or releasing the pressure on the pressure block 201. No additional operation is required, making the operation convenient. In addition, during the sliding process of the pressure block 201 driving the slide plate 20, the fixing blocks 203 can correspond to the fixing grooves 102 at different positions, adapting to the different position fixation requirements of the push rod 11 during drug drawing and injection.

[0028] Specifically, in the above embodiment, the slide plate 20 is provided with a second limiting groove 209, and the bottom ends of both sets of fixing blocks 203 are slidably disposed within the second limiting groove 209. This ensures the stability of the sliding of the fixing blocks 203.

[0029] Please refer to the following: Figure 7 Based on the above embodiments, the first protective mechanism further includes a connecting rod 205 and an adjusting component; the connecting rod 205 is slidably disposed on the slide plate 20 along the axis of the syringe 1, one end of the slide plate 20 is snapped into connection with the push rod 11, and the adjusting component connects the slide plate 20 and the connecting rod 205 to drive the connecting rod 205 to slide.

[0030] In the above embodiments, during the installation of the syringe 1, the length of the connecting rod 205 and the slide plate 20 is adjusted by sliding the connecting rod 205 driven by the adjusting component, which facilitates the adaptation of syringes 1 of different lengths and improves the applicability of the device. Specifically, in the above embodiments, one end of the connecting rod 205 is provided with a slot 2051 for engaging with the end of the push rod 11. The connection and separation of the connecting rod 205 and the push rod 11 are convenient.

[0031] Furthermore, the adjustment assembly includes a screw 206; a slide groove 207 is provided at one end of the slide plate 20, the connecting rod 205 slides through the slide groove 207 along the axial direction of the syringe 1, the screw 206 is arranged along the axial direction of the syringe 1 and is rotatably disposed in the slide groove 207 and threadedly connected to the connecting rod 205.

[0032] In the above embodiments, the connecting rod 205 can be driven to move by rotating the screw 206 in threaded engagement with the connecting rod 205. During the installation of the syringe 1, it is convenient to adjust the engagement length between the connecting rod 205 and the slide plate 20. On the other hand, during the drug extraction and injection process, rotating the screw 206 to drive the connecting rod 205 to move can drive the push rod 11 to move for fine adjustment, which facilitates precise control of the movement distance of the push rod 11, improves the control accuracy of drug dosage during drug extraction and injection, and meets the clinical needs of precise injection of radiopharmaceuticals in nuclear medicine.

[0033] Specifically, in the above embodiment, a knob 2061 is provided at one end of the screw 206, and the knob 2061 protrudes from the top surface of the slide plate 20. This facilitates driving the screw 206 to rotate.

[0034] Please see Figure 3 , Figure 5 and Figure 6 In one embodiment, the transmission mechanism includes a pressure plate 301, a worm gear 302, a worm 303, and a second transmission assembly. The pressure plate 301 is slidably disposed on the base 10 along the radial direction of the syringe 1 and located below the slide plate 20. The bottom end of the pressure block 201 is slidably disposed on the top end of the pressure plate 301 along the axial direction of the syringe 1. Worm gears 302 are coaxially disposed at the hinge joints of the two sets of semicircular sleeves 30. Two sets of worms 303 are disposed opposite to each other at one end of the base 10. The two sets of worms 303 have opposite spiral lines and mesh with the two sets of worm gears 302 respectively. The second transmission assembly connects the pressure plate 301 and the two sets of worms 303 to convert the movement of the pressure plate 301 into the synchronous rotation of the two sets of worms 303.

[0035] In the above embodiment, when the pressure block 201 moves closer to the syringe 1, the pressure block 201 drives the pressure plate 301 to move. The movement of the pressure plate 301 drives the two sets of worm gears 303 to rotate synchronously through the second transmission component. The synchronous rotation of the two sets of worm gears 303 meshes with the two sets of worm wheels 302, which in turn drives the two sets of semicircular sleeves 30 to open and move. Conversely, when the pressure block 201 drives the pressure plate 301 to move away from the syringe 1, the two sets of worm gears 303 are driven to rotate synchronously in the opposite direction through the second transmission component. The synchronous rotation of the two sets of worm gears 303 in the opposite direction meshes with the two sets of worm wheels 302, which in turn drives the two sets of worm wheels 302 to close and move. The opening and closing of the two sets of semicircular sleeves 30 is convenient, and the worm wheel 302 and worm gear 303 have a self-locking characteristic, which can prevent the semicircular sleeves 30 from accidentally opening and closing due to external force collision, thus ensuring the reliability of the needle tip 12 protection.

[0036] Specifically, in the above embodiment, the base 10 has third limiting grooves 104 on both sides, and the pressure plate 301 is slidably disposed within the two sets of third limiting grooves 104 along the radial direction of the syringe 1. This ensures the stability of the sliding of the pressure plate 301.

[0037] Specifically, in the above embodiment, a T-shaped groove 3011 is provided at the top of the pressure plate 301, and the bottom end of the pressure block 201 is slidably disposed in the T-shaped groove 3011 along the axial direction of the syringe 1. This facilitates the movement of the pressure plate 301 by the pressure block 201, and the pressure block 201 slides relative to the pressure plate 301.

[0038] Furthermore, the second transmission assembly includes a gear 304 and a rack 305; the opposite ends of the two sets of worm gears 303 are coaxially provided with gears 304, and two sets of racks 305 are oppositely provided on the pressure plate 301, with the two sets of racks 305 meshing with the two sets of gears 304 respectively.

[0039] In the above embodiment, the linear movement of the pressure plate 301 is converted into the rotation of the gear 304 by the rack 305 and the gear 304, which in turn drives the worm gear 303 to rotate. This results in high transmission efficiency and fast action response, ensuring the synchronicity between the movement of the pressure block 201 and the opening and closing of the semicircular sleeve 30. This achieves instantaneous linkage where operating the pressure block 201 opens the needle tip 12 protection and releasing the pressure block 201 closes the protection.

[0040] Please see Figure 6 In one embodiment, when the two sets of semicircular sleeves 30 are closed and cover the needle 12, the opposite sides of the two sets of semicircular sleeves 30 are in sealed contact, and the ends away from the syringe 1 are closed. Furthermore, a sponge pad 306 that elastically contacts the needle 12 is provided on the inner side of each set of semicircular sleeves 30.

[0041] In the above embodiments, even when medication flows out from the needle 12, the sponge pad 306 can absorb the medication, thereby effectively preventing the medication from spilling out from the semi-circular sleeve 30. Furthermore, the sponge pad 306 makes elastic contact with the needle 12, adapting to needles 12 of different sizes and improving the applicability of the device.

[0042] The specific implementation of the above-mentioned radiopharmaceutical injection protective structure is as follows: By holding the base 10 and pressing the pressure block 201 with your fingers, the pressure block 201 moves closer to the syringe 1. The spring 202 is compressed and contracts. At this time, the pressure block 201 drives the V-shaped guide groove 204 to move. The V-shaped guide groove 204 cooperates with the two sets of guide rods 2031 to drive the two sets of fixing blocks 203 to move closer to each other and exit from the fixing groove 102, thereby canceling the fixation of the slide plate 20. At the same time, the pressure block 201 drives the pressure plate 301 to move. The movement of the pressure plate 301 drives the two sets of worm gears 303 to rotate synchronously through the cooperation of the rack 305 and the gear 304. The synchronous rotation of the two sets of worm gears 303 meshes with the two sets of worm wheels 302, which drives the two sets of worm wheels 302 to drive the two sets of semi-circular sleeves 30 to open and move to expose the needle 12. Then, by moving the pressure block 201 with your fingers, the slide plate 20 slides and drives the push rod 11 to move, so as to perform drug aspiration or injection. It is convenient to operate with one hand.

[0043] When syringe 1 falls, the pressure on pressure block 201 disappears, and the reaction force of spring 202 causes pressure block 201 to move away from syringe 1. At this time, pressure block 201 drives V-shaped guide groove 204 to move in the opposite direction and cooperate with two sets of guide rods 2031, which in turn drives two sets of fixing blocks 203 to move away from each other and insert into the currently cooperating fixing groove 102 to fix slide plate 20, thereby fixing push rod 11. Pressure block 201 also drives pressure plate 301 to move in the opposite direction. The reverse movement of pressure plate 301 drives two sets of worm gears 303 to rotate synchronously in the opposite direction through the cooperation of rack 305 and gear 304. The rotation engages with two sets of worm gears 302, which drive the two sets of semi-circular sleeves 30 to close and move, covering the needle 12 for protection. This automatically protects the needle 12 and fixes the push rod 11 when the syringe 1 falls, preventing the radioactive drug inside the syringe 1 from spilling out. This effectively prevents radioactive material leakage, avoids drug waste and secondary radiation pollution, and reduces safety hazards. Furthermore, during the movement of the syringe 1, the pressure on the pressure block 201 can be automatically released to protect the needle 12 and fix the push rod 11, preventing the radioactive drug from spilling due to shaking caused by the movement.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A protective structure for radiopharmaceutical injection, characterized in that, include: The base (10) is disposed around the syringe (1); The first protective mechanism includes a sliding plate (20), a pressure block (201), a spring (202), and a fixing mechanism. The sliding plate (20) is slidably disposed on the base (10) along the axial direction of the syringe (1), and one end is engaged with the push rod (11) in the syringe (1). The pressure block (201) is slidably disposed on the other end of the sliding plate (20) along the radial direction of the syringe (1). The spring (202) connects the sliding plate (20) and the pressure block (201) and provides a thrust to the pressure block (201) to move away from the syringe (1). The fixing mechanism is disposed on the sliding plate (20) and connected to the base (10) and the pressure block (201) and is used to fix or release the sliding plate (20) when the pressure block (201) moves away from or near the syringe (1). The second protective mechanism includes a semi-circular sleeve (30) and a transmission mechanism. Two sets of openable and closable semi-circular sleeves (30) are hinged to one end of the base (10). The opening and closing of the two sets of semi-circular sleeves (30) can open or cover the needle (12) of the syringe (1). The transmission mechanism connects the pressure block (201) and the two sets of semi-circular sleeves (30) and is used to drive the two sets of semi-circular sleeves (30) to open and close when the pressure block (201) moves closer to or away from the syringe (1).

2. The radiopharmaceutical injection protective structure according to claim 1, characterized in that, The base (10) is provided with an array of multiple sets of open retaining rings (101), and the syringe (1) is fixed in the multiple sets of open retaining rings (101).

3. The radiopharmaceutical injection protective structure according to claim 1, characterized in that, The fixing mechanism includes a fixing block (203) and a first transmission component. Two sets of fixing blocks (203) are slidably disposed on the top of the slide plate (20). Multiple sets of fixing slots (102) are arrayed on both sides of the base (10) along the axial direction of the syringe (1). The two sets of fixing blocks (203) can be inserted into or removed from the fixing slots (102) when they move away from or closer to each other. The first transmission component connects the pressure block (201) and the two sets of fixing blocks (203) and is used to drive the two sets of fixing blocks (203) to move away from or closer to each other when the pressure block (201) moves away from or closer to the syringe (1).

4. The radiopharmaceutical injection protective structure according to claim 3, characterized in that, The pressure block (201) has a V-shaped guide groove (204) with its tip facing away from the syringe (1) on one side. The two sets of fixing blocks (203) are provided with guide rods (2031) at opposite ends. The two sets of guide rods (2031) are slidably disposed at both ends of the V-shaped guide groove (204).

5. The radiopharmaceutical injection protective structure according to claim 1, characterized in that, The first protective mechanism further includes a connecting rod (205) and an adjusting component; the connecting rod (205) is slidably disposed on the slide plate (20) along the axis of the syringe (1), one end of the slide plate (20) is snapped into connection with the push rod (11), and the adjusting component connects the slide plate (20) and the connecting rod (205) to drive the connecting rod (205) to slide.

6. The radiopharmaceutical injection protective structure according to claim 5, characterized in that, The adjusting assembly includes a screw (206); a slide groove (207) is provided at one end of the slide plate (20); the connecting rod (205) slides through the slide groove (207) along the axial direction of the syringe (1); the screw (206) is arranged along the axial direction of the syringe (1) and is rotatably disposed in the slide groove (207) and threadedly connected to the connecting rod (205).

7. The radiopharmaceutical injection protective structure according to claim 1, characterized in that, The transmission mechanism includes a pressure plate (301), a worm gear (302), a worm (303), and a second transmission component. The pressure plate (301) is slidably disposed on the base (10) along the radial direction of the syringe (1) and located below the slide plate (20). The bottom end of the pressure block (201) is slidably disposed on the top end of the pressure plate (301) along the axial direction of the syringe (1). The worm gear (302) is coaxially disposed at the hinge joint of the two sets of semicircular sleeves (30). Two sets of worms (303) are disposed opposite to each other at one end of the base (10). The spiral lines of the two sets of worms (303) are opposite and mesh with the two sets of worm gears (302) respectively. The second transmission component connects the pressure plate (301) and the two sets of worms (303) to convert the movement of the pressure plate (301) into the synchronous rotation of the two sets of worms (303).

8. The radiopharmaceutical injection protective structure according to claim 7, characterized in that, The second transmission assembly includes a gear (304) and a rack (305); the gears (304) are coaxially arranged on the opposite ends of the two sets of worm gears (303), and the racks (305) are arranged opposite to each other on the pressure plate (301), and the two sets of racks (305) mesh with the two sets of gears (304) respectively.

9. The radiopharmaceutical injection protective structure according to claim 1, characterized in that, When the two sets of semicircular sleeves (30) are closed and covered on the needle (12), the two sets of semicircular sleeves (30) are in sealed contact on opposite sides and the ends away from the syringe (1) are closed.

10. A radiopharmaceutical injection protective structure according to claim 9, characterized in that, Both sets of semicircular sleeves (30) have a sponge pad (306) on the inner side that makes elastic contact with the needle (12).

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