Injection device for radioactive medicament in nuclear medicine department

Abstract

The invention relates to the technical field of injectors, and discloses a nuclear medicine department radiopharmaceutical injection device which comprises a main machine shell, two sets of installation covers are fixedly installed at the bottom of the main machine shell, sealing cores are fixedly installed at the centers of the top walls of the installation covers, and piston rods are arranged along the central axes of the installation covers and the sealing cores. A piston head is fixedly mounted at the bottom end of the piston rod; a needle cylinder is arranged on the outer side of the sealing core in a sleeving mode, a clamping assembly is arranged in the mounting cover, and lifting driving pieces are fixedly mounted at the tops of the two piston rods. The rubber ring is extruded on the inner wall of the needle cylinder to pre-fix the needle cylinder; then a push button is pushed, an annular belt is driven to move, six groups of rotating rollers are driven to synchronously rotate anticlockwise, and a rotating arm deflects towards the needle cylinder, so that a clamping column is attached to the outer wall of the needle cylinder, and the needle cylinder is clamped and fixed from the outside; therefore, the needle cylinder is fixed in a horizontal pushing mode, the effect of preventing mistaken touch is achieved, and the purpose of stably fixing the needle cylinder is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of syringes, in particular to an injection device for radiopharmaceuticals in nuclear medicine. Background Art

[0002] As an auxiliary device in the radiology diagnosis and treatment system, high-pressure injectors are gradually used in clinical practice with the development of technologies such as X-rays, fast film changers, image intensifiers, and artificial contrast agents. The basic function of a high-pressure injector is to quickly and accurately inject a sufficient amount of high-concentration X-ray contrast agent into the examination site through percutaneous puncture into the blood vessels or through the original channels of the human body within a certain period of time, so as to perform diagnostic imaging and treatment on the lesion site.

[0003] During the three steps of aspirating the radioactive drug, exhausting the air inside the syringe, and injecting the radioactive drug into the patient, the main body of the high-pressure syringe needs to be flipped over many times. Therefore, after the syringe is installed on the main body of the high-pressure syringe, the syringe needs to be limited by a limiting structure to prevent the syringe from detaching when the main body of the high-pressure syringe is flipped over. The limiting structure between the main body of the high-pressure syringe and the syringe is generally locked by rotation. During operation, it is easy to be accidentally touched, affecting the fixing effect of the syringe; thus, further improvements can be made. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides an injection device for radiopharmaceuticals in nuclear medicine, which has the advantages of stably fixing the syringe and solves the problem of accidental touching after the syringe is fixed, thus affecting the fixing effect of the syringe.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of stably fixing the syringe, the present invention provides the following technical solutions: a nuclear medicine radiopharmaceutical injection device, comprising a main body housing, two groups of mounting covers are fixedly installed on the bottom of the main body housing, a sealing core is fixedly installed at the center of the top wall of the mounting cover, a piston rod is arranged along the central axis of the mounting cover and the sealing core, the piston rod penetrates and is slidably connected to the bottom of the main body housing, the mounting cover and the sealing core, a piston head is fixedly installed on the bottom end of the piston rod; a syringe is sleeved on the outer side of the sealing core, the piston head is slidably connected in the syringe, a clamping assembly is arranged inside the mounting cover, and the clamping assembly is clamped on the outer wall of the top end of the syringe; lifting drive members are fixedly installed on the top of the two groups of piston rods.

[0008] Preferably, the mounting cover comprises an upper sealing cover, a mounting ring 1, a mounting ring 2, a mounting ring 3 and a lower sealing ring which are arranged in sequence from top to bottom, the upper sealing cover being fixedly mounted on the bottom of the main housing, the front side of the mounting ring 3 being provided with a flat portion, and the front side of the mounting ring 3 being penetrated by a sliding groove; the diameter of the upper half of the sealing core is smaller than the diameter of the lower half thereof, the cross section of the sealing core is in a "convex" shape, the top end of the sealing core is fixedly mounted on the bottom of the upper sealing cover, the mounting ring 1 is fixedly mounted on the outer wall of the upper half of the sealing core, and the top of the lower half of the sealing core is attached to the bottom of the mounting ring 1; an annular socket is formed between the inner walls of the mounting ring 2 and the lower sealing ring and the outer wall of the sealing core, and the syringe is inserted into the annular socket.

[0009] Preferably, the clamping assembly includes six groups of rollers arranged in an array within the mounting ring three, a rotating shaft passing through and fixed at the center of the rollers, two ends of the rotating shaft are rotatably connected to the mounting ring two and the lower sealing ring respectively, the six groups of rollers are connected by an annular belt, a slider is fixedly installed on the front side of the annular belt, the slider is slidably connected to the slide groove, a push button is fixedly installed at the front end of the slider, and the push button is connected to the plane part of the mounting ring three by bolts; fixing rings are fixedly installed at both ends of the rollers, a rotating arm is fixedly installed on the circumferential surface of the fixing ring, a clamping column is fixedly installed between the other ends of the two groups of rotating arms, and the clamping column is attached to the outer wall of the syringe.

[0010] Preferably, an upper clamping ring and a lower clamping ring are fixedly installed on the surface of the rotating roller, the upper clamping ring is located above the lower clamping ring, and the upper and lower clamping rings are clamped on the upper and lower sides of the annular belt. An array of latch teeth are fixed on the middle circumferential surface of the rotating roller, and latch grooves are equidistantly arranged on the inner side of the annular belt corresponding to the latch teeth.

[0011] Preferably, two groups of rubber rings are fixedly installed on the circumferential surface of the lower half of the sealing core, an annular groove is provided on the top of the lower half of the sealing core, and adsorption holes are arranged in an array on the circumferential surface of the lower half of the sealing core, the adsorption holes are connected with the annular groove, and the adsorption holes are located between the two groups of rubber rings; a suction channel is provided inside the mounting ring 1, the suction channel is connected with the annular groove, and a negative pressure driving member is provided inside the suction channel.

[0012] Preferably, the inner wall of the mounting ring 1 is provided with two groups of arc grooves 1, the arc grooves 1 are connected with the annular groove, the two groups of arc grooves 1 are distributed on the left and right, and the top of the mounting ring 1 is provided with two groups of arc grooves 2, the two groups of arc grooves 2 are distributed on the left and right; the arc grooves 1 and arc grooves 2 on the same side are connected through a connecting hole, and the connecting hole is located between the ends of the arc grooves 1 and 2, and the two groups of connecting holes are symmetrical about the axis center of the mounting ring 1; the arc grooves 1, 2 and the connecting hole constitute a suction flow channel.

[0013] Preferably, the negative pressure driving member includes a sliding plate slidably connected in the arc groove 2, the sliding plate divides the arc groove 2 into cavity 1 and cavity 2, the cavity 1 is connected with the connecting hole, and the outer wall of the mounting ring 1 is penetrated by two groups of exhaust holes, the exhaust holes correspond one-to-one with the sliding plates, and the exhaust holes are connected with cavity 2; the surface of the sliding plate facing cavity 2 is fixedly installed with an arc rack and an arc slide bar, the arc rack and the arc slide bar are respectively attached to the two side walls of the arc groove 2, and a baffle is fixedly installed between the two side walls of the arc groove 2, the baffle is attached to the top of the arc rack and the arc slide bar, and the arc rack and the arc slide bar are attached to the bottom of the mounting ring 2; the arc rack is meshed with a gear, wherein two rotating shafts penetrate the mounting ring 2 and are fixedly installed at the bottom center of the gear.

[0014] Preferably, the lifting drive member includes a connecting plate, and the top ends of the two groups of piston rods are connected via the connecting plate. An arch seat is fixedly installed on the top of the connecting plate, and a cylinder is fixedly installed on the top of the arch seat.

[0015] Preferably, the lifting drive component also includes a frame plate mounted on the outside of the connecting plate, friction blocks are fixedly installed on both sides of the rear end of the frame plate, and a U-shaped rod is fixedly installed on the front end of the frame plate; two groups of U-shaped plates are fixedly installed on the rear inner wall of the main engine shell, and rubber sheets are fixed in an array on the front and rear side walls of the U-shaped plates, and trapezoidal block 1 and trapezoidal block 2 are fixedly installed on the front inner wall of the main engine shell, the inclined surface of trapezoidal block 1 faces the rear side, and the inclined surface of trapezoidal block 2 faces the front side; during the downward movement of the frame plate, the friction block passes through the inside of the U-shaped plate.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a nuclear medicine radiopharmaceutical injection device, which has the following beneficial effects:

[0018] 1. The nuclear medicine radiopharmaceutical injection device is used to move the syringe upward by holding the syringe, so that the sealing core is inserted into the opening at the top of the syringe, and the rubber ring is squeezed on the inner wall of the syringe. The syringe is pre-fixed by the friction between the rubber ring and the syringe; then the push button is pushed to make the slider slide to the right along the slide groove, driving the annular belt to move, driving the six groups of rollers to rotate synchronously counterclockwise, and the rotating arm deflects toward the syringe, so that the clamping column fits on the outer wall of the syringe, and the syringe is clamped and fixed from the outside; then the push button is fixed to the mounting ring three by bolts; thus, the syringe is fixed by horizontal pushing, which has the effect of preventing accidental touch and achieving the purpose of stably fixing the syringe;

[0019] 2. The nuclear medicine radiopharmaceutical injection device drives the gear to rotate counterclockwise through the counterclockwise rotation of the roller, drives the arc-shaped rack to move counterclockwise, and slides inside the arc-shaped groove 2 to increase the internal space of the cavity 1, so that the cavity 1 is in a negative pressure state, cooperates with the connecting hole and the arc-shaped groove 1 to make the inside of the annular groove in a negative pressure state, and then adsorbs the inner wall of the syringe through the adsorption hole to fix the syringe from the inside; thereby achieving the purpose of further fixing the syringe;

[0020] 3. The nuclear medicine radiopharmaceutical injection device extends the cylinder output end to drive the arch seat and the connecting plate to move downward, so that the piston rod and the piston head move downward, and the radiopharmaceutical in the syringe is pushed out and injected into the patient's body; and in the process of the connecting plate moving downward, the friction block passes through the inside of the U-shaped plate, and the rubber sheet blocks the friction block, increasing the resistance of the connecting plate to move downward, so that when injecting the drug, the piston head moves slowly, avoiding discomfort to the patient due to too fast injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of a nuclear medicine radiopharmaceutical injection device proposed by the present invention with the main body shell removed;

[0023] Figure 3 The present invention provides a nuclear medicine radiopharmaceutical injection device Figure 2 A schematic diagram of the three-dimensional structure after removing the lifting drive component;

[0024] Figure 4 This is a schematic diagram of a three-dimensional explosion structure of a mounting cover, a syringe and a piston head of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0025] Figure 5 The present invention provides a nuclear medicine radiopharmaceutical injection device Figure 3 Schematic diagram of the main cross-sectional structure;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of a mounting cover of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of a clamping assembly of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the suction flow channel in the installation cover of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0029] Fig. 9 This is a schematic diagram of the three-dimensional structure of a negative pressure driving component of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0030] Fig.10 This is a schematic diagram of the three-dimensional structure of a lifting and driving component of a nuclear medicine radiopharmaceutical injection device proposed by the present invention;

[0031] Fig.11 This is a left-side structural schematic diagram of a lifting and driving component of a nuclear medicine radiopharmaceutical injection device proposed by the present invention.

[0032] In the figure: 100, mainframe housing; 200, mounting cover; 300, sealing core; 400, piston rod; 500, piston head; 600, syringe; 700, clamping assembly; 800, negative pressure driving member; 900, lifting driving member;

[0033] 201, upper cover; 202, mounting ring 1; 203, mounting ring 2; 204, mounting ring 3; 205, lower sealing ring; 206, slide groove; 207, arc groove 1; 208, arc groove 2; 209, connecting hole;

[0034] 301, rubber ring; 302, annular groove; 303, adsorption hole;

[0035] 701, roller; 702, shaft; 703, annular belt; 704, slider; 705, push button; 706, bolt; 707, fixing ring; 708, rotating arm; 709, clamping column;

[0036] 7011, upper clamping ring; 7012, lower clamping ring; 7013, latching teeth;

[0037] 801, sliding piece; 802, arc-shaped rack; 803, arc-shaped sliding bar; 804, baffle; 805, gear; 806, exhaust hole;

[0038] 901, connecting plate; 902, frame plate; 903, friction block; 904, U-shaped rod; 905, arch seat; 906, cylinder; 907, U-shaped plate; 908, rubber sheet; 909, trapezoidal block one; 910, trapezoidal block two. DETAILED DESCRIPTION

[0039] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-Figure 5 A nuclear medicine radiopharmaceutical injection device includes a main housing 100, two groups of mounting covers 200 are fixedly installed at the bottom of the main housing 100, a sealing core 300 is fixedly installed at the center of the top wall of the mounting cover 200, a piston rod 400 is arranged along the central axis of the mounting cover 200 and the sealing core 300, the piston rod 400 penetrates and is slidably connected to the bottom of the main housing 100, the mounting cover 200 and the sealing core 300, a piston head 500 is fixedly installed at the bottom of the piston rod 400; a syringe 600 is sleeved on the outer side of the sealing core 300, the piston head 500 is slidably connected in the syringe 600, a clamping assembly 700 is arranged inside the mounting cover 200, and the clamping assembly 700 is clamped on the outer wall of the top end of the syringe 600; a lifting drive member 900 is fixedly installed on the top of the two groups of piston rods 400.

[0042] See also Figure 5-Figure 6The mounting cover 200 includes an upper sealing cover 201, a mounting ring 1 202, a mounting ring 203, a mounting ring 3 204, and a lower sealing ring 205, which are arranged in sequence from top to bottom. The upper sealing cover 201 is fixedly mounted on the bottom of the main housing 100, and a flat portion is arranged on the front side of the mounting ring 3 204. A slide groove 206 is provided through the front side of the mounting ring 3 204. The diameter of the upper half of the sealing core 300 is smaller than the diameter of the lower half thereof. The cross section of the sealing core 300 is in a "convex" shape. The top of the sealing core 300 is fixedly mounted on the bottom of the upper sealing cover 201, and the mounting ring 1 202 is fixedly mounted on the outer wall of the upper half of the sealing core 300, and the top of the lower half of the sealing core 300 is attached to the bottom of the mounting ring 1 202. An annular socket is formed between the inner wall of the mounting ring 203 and the lower sealing ring 205 and the outer wall of the sealing core 300, and the syringe 600 is inserted into the annular socket. The diameter of the lower half of the sealing core 300 is equal to the inner diameter of the syringe 600, so that the top opening of the syringe 600 is sealed by the sealing core 300. The lower surface of the piston head 500 is matched with the bottom wall of the syringe 600. When the piston rod 400 moves downward under the drive of the lifting drive member 900 and the piston head 500 is attached to the bottom wall of the syringe 600, the radioactive drug inside the syringe 600 can be completely discharged.

[0043] See also Figure 6-Figure 7 The clamping assembly 700 includes six groups of rollers 701 arranged in an array in the mounting ring 3 204. A rotating shaft 702 is fixed through the center of the rollers 701. The two ends of the rotating shaft 702 are rotatably connected to the mounting ring 203 and the lower sealing ring 205 respectively. The six groups of rollers 701 are connected by an annular belt 703. A slider 704 is fixedly installed on the front side of the annular belt 703. The slider 704 is slidably connected to the slide groove 206. A push button 705 is fixedly installed at the front end of the slider 704. The push button 705 is connected to the plane part of the mounting ring 3 204 by a bolt 706. A circular hole is opened on the surface of the push button 705, and a threaded hole is opened on the plane part of the mounting ring 3 204. After pushing the push button 705 to align the circular hole on the push button 705 with the threaded hole, the bolt 706 is passed through the circular hole and then screwed, so that the bolt 706 is threadedly connected in the threaded hole, thereby limiting the push button 705.

[0044] Both ends of the roller 701 are fixedly installed with a fixing ring 707, and a rotating arm 708 is fixedly installed on the circumferential surface of the fixing ring 707. A clamping column 709 is fixedly installed between the other ends of the two sets of rotating arms 708, and the clamping column 709 is attached to the outer wall of the syringe 600. By pushing the push button 705, the slider 704 slides along the slide groove 206, driving the annular belt 703 to move, thereby driving the six sets of rollers 701 to rotate, causing the rotating arm 708 to deflect toward the syringe 600 until the clamping column 709 is attached to the outer wall of the syringe 600. In addition, a rubber sleeve is provided on the outer side of the clamping column 709. When the clamping column 709 is clamped on the outer wall of the syringe 600, the rubber sleeve is squeezed and deformed, thereby ensuring that the clamping effect of the clamping column 709 on the syringe 600 is stable.

[0045] See also Figure 7 The surface of the roller 701 is fixedly mounted with an upper clamping ring 7011 and a lower clamping ring 7012. The upper clamping ring 7011 is located above the lower clamping ring 7012. The upper clamping ring 7011 and the lower clamping ring 7012 clamp the upper and lower sides of the annular belt 703, thereby preventing the annular belt 703 from moving up and down relative to the roller 701. An array of latching teeth 7013 is fixed on the circumferential surface of the middle part of the roller 701. The inner side of the annular belt 703 is equidistantly provided with latching grooves corresponding to the latching teeth 7013, which are not shown in the figure. Therefore, when the slider 704 moves horizontally along the slide groove 206, the annular belt 703 moves, which can stably drive the roller 701 to rotate.

[0046] See also Figure 8-Figure 9 Two groups of rubber rings 301 are fixedly installed on the circumferential surface of the lower half of the sealing core 300, and an annular groove 302 is provided on the top of the lower half of the sealing core 300. The mounting ring 1 202 seals the top opening of the annular groove 302. Adsorption holes 303 are arranged in an array on the circumferential surface of the lower half of the sealing core 300. The adsorption holes 303 are connected to the annular groove 302, and the adsorption holes 303 are located between the two groups of rubber rings 301. A suction channel is provided inside the mounting ring 1 202, and the suction channel is connected to the annular groove 302. A negative pressure driving member 800 is provided inside the suction channel. The negative pressure driving member 800 makes the inside of the suction channel in a negative pressure state, so that the inside of the annular groove 302 is in a negative pressure state, and then the inner wall of the syringe 600 is adsorbed through the adsorption holes 303.

[0047] See also Figure 8-Figure 9The inner wall of the mounting ring 1 202 is provided with two groups of arc grooves 1 207, which are connected to the annular groove 302, and the two groups of arc grooves 1 207 are distributed on the left and right. The top of the mounting ring 1 202 is provided with two groups of arc grooves 2 208, and the two groups of arc grooves 2 208 are distributed on the left and right. The arc grooves 1 207 and the arc grooves 2 208 on the same side are connected through the connecting hole 209, and the connecting hole 209 is located between the ends of the arc grooves 1 207 and the arc grooves 2 208, and the two groups of connecting holes 209 are symmetrical about the axis of the mounting ring 1 202. The arc grooves 1 207, the arc grooves 2 208 and the connecting hole 209 constitute a suction flow channel.

[0048] See also Figure 8-Figure 9 The negative pressure driving member 800 includes a slide 801 slidably connected in the arc groove 208. The slide 801 divides the arc groove 208 into a cavity 1 and a cavity 2. The cavity 1 is connected to the connecting hole 209. Two groups of exhaust holes 806 are provided on the outer wall of the mounting ring 1 202. The exhaust holes 806 correspond to the slide 801 one by one, and the exhaust holes 806 are connected to the cavity 2. The slide 801 slides inside the arc groove 208, so that the space inside the cavity 2 is reduced, and the space inside the cavity 1 is increased, so that the inside of the cavity is in a negative pressure state. And through the setting of the exhaust holes 806, it is convenient to discharge the air inside the cavity 2.

[0049] See also Figure 8-Figure 9 An arc-shaped rack 802 and an arc-shaped slide bar 803 are fixedly installed on the surface of the slide 801 facing the second cavity. The arc-shaped rack 802 and the arc-shaped slide bar 803 are respectively attached to the two side walls of the arc-shaped groove 208. A baffle 804 is fixedly installed between the two side walls of the arc-shaped groove 208. The baffle 804 is attached to the top of the arc-shaped rack 802 and the arc-shaped slide bar 803. The arc-shaped rack 802 and the arc-shaped slide bar 803 are attached to the bottom of the mounting ring 203; the arc-shaped rack 802 is meshed with a gear 805, wherein the two rotating shafts 702 pass through the mounting ring 203 and are fixedly installed at the bottom center of the gear 805. Thus, in the process of pushing the slider 704, causing the roller 701 to rotate and driving the clamping column 709 to clamp on the outer wall of the syringe 600, the roller 701 drives the gear 805 to rotate, driving the arc rack 802 to slide inside the arc groove 208, thereby driving the slide 801 to move inside the arc groove 208, thereby increasing the internal space of cavity one and reducing the internal space of cavity two.

[0050] See also Figure 10-11The lifting drive member 900 includes a connecting plate 901, and the top ends of the two groups of piston rods 400 are connected through the connecting plate 901. An arch seat 905 is fixedly installed on the top of the connecting plate 901, and a cylinder 906 is fixedly installed on the top of the arch seat 905. The output end of the cylinder 906 is extended and retracted to drive the arch seat 905 and the connecting plate 901 to move up and down, thereby driving the piston rod 400 to move up and down, and the piston head 500 slides inside the syringe 600.

[0051] The lifting drive member 900 also includes a frame plate 902 sleeved on the outside of the connecting plate 901, so that the frame plate 902 can slide forward and backward relative to the connecting plate 901. Friction blocks 903 are fixedly installed on both sides of the rear end of the frame plate 902, and a U-shaped rod 904 is fixedly installed on the front end of the frame plate 902. Two groups of U-shaped plates 907 are fixedly installed on the inner wall of the rear side of the main housing 100, and rubber sheets 908 are fixed in an array on the front and rear side walls of the U-shaped plates 907. A trapezoidal block 1 909 and a trapezoidal block 2 910 are fixedly installed on the inner wall of the front side of the main housing 100, and the inclined surface of the trapezoidal block 1 909 faces the rear side, and the inclined surface of the trapezoidal block 2 910 faces the front side. During the upward movement of the connecting plate 901, the front side of the U-shaped rod 904 is squeezed by the trapezoidal block 1 909, so that the frame plate 902 moves backward relative to the connecting plate 901, and the friction block 903 moves to the top of the U-shaped plate 907; afterwards, during the downward movement of the frame plate 902, the friction block 903 passes through the inside of the U-shaped plate 907. When the friction block 903 is separated from the bottom of the U-shaped plate 907 and continues to move downward, the trapezoidal block 2 910 is inserted into the inside of the U-shaped rod 904 and squeezes the U-shaped rod 904, so that the frame plate 902 moves forward relative to the connecting plate 901, and the friction block 903 moves to the front side of the U-shaped plate 907; afterwards, the connecting plate 901 moves upward, and the friction block 903 moves upward at the front side of the U-shaped plate 907.

[0052] When in use, the syringe 600 is held and moved upward to insert the sealing core 300 into the top opening of the syringe 600, and the rubber ring 301 is pressed against the inner wall of the syringe 600. The syringe 600 is pre-fixed by the friction between the rubber ring 301 and the syringe 600.

[0053] Then push the push button 705 to make the slider 704 slide rightward along the slide groove 206, drive the annular belt 703 to move, drive the six groups of rollers 701 to rotate counterclockwise synchronously, and the rotating arm 708 deflects toward the syringe 600, so that the clamping column 709 fits on the outer wall of the syringe 600, and clamps and fixes the syringe 600 from the outside; then fix the push button 705 on the mounting ring 3 204 by the bolt 706;

[0054] The roller 701 rotates counterclockwise, driving the gear 805 to rotate counterclockwise, driving the arc rack 802 to move counterclockwise, and the slide 801 slides inside the arc groove 208, so that the internal space of the cavity 1 is enlarged, so that the inside of the cavity 1 is in a negative pressure state, and the connecting function of the connecting hole 209 and the arc groove 1 207 is coordinated, so that the inside of the annular groove 302 is in a negative pressure state, and then the inner wall of the syringe 600 is adsorbed through the adsorption hole 303, and the syringe 600 is fixed from the inside;

[0055] Then, the output end of the cylinder 906 contracts, pulling the arch seat 905 and the connecting plate 901 upward, and the piston rod 400 and the piston head 500 move upward, so that the radioactive drug is sucked into the syringe 600; and in the process of the frame plate 902 following the connecting plate 901 moving upward, the U-shaped rod 904 is squeezed by the inclined surface of the trapezoidal block 1 909, so that the frame plate 902 moves backward relative to the connecting plate 901, and the friction block 903 moves to the top of the U-shaped plate 907;

[0056] Afterwards, the output end of the cylinder 906 extends, driving the arch seat 905 and the connecting plate 901 to move downward, causing the piston rod 400 and the piston head 500 to move downward, pushing out the radioactive drug in the syringe 600 and injecting it into the patient's body; and in the process of the connecting plate 901 moving downward, the friction block 903 passes through the inside of the U-shaped plate 907, and the rubber sheet 908 blocks the friction block 903, increasing the resistance of the connecting plate 901 to move downward, so that when injecting the drug, the piston head 500 moves relatively slowly.

[0057] After the friction block 903 is detached from the bottom of the U-shaped plate 907 and continues to move downward, the trapezoidal block 910 is inserted into the U-shaped rod 904. The trapezoidal block 910 is inclined to face the U-shaped rod 904 and squeezes the frame plate 902 forward relative to the connecting plate 901, so that the friction block 903 moves to the front of the U-shaped plate 907. When the connecting plate 901 moves upward, the U-shaped plate 907 and the rubber sheet 908 are prevented from rubbing against the friction block 903, so that when the radioactive agent is sucked out, the piston head 500 moves upward smoothly.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nuclear medicine radiopharmaceutical injection device, comprising a main housing (100), characterized in that: Two groups of mounting covers (200) are fixedly mounted on the bottom of the main housing (100); a sealing core (300) is fixedly mounted at the center of the top wall of the mounting cover (200); a piston rod (400) is arranged along the central axis of the mounting cover (200) and the sealing core (300); the piston rod (400) penetrates and is slidably connected to the bottom of the main housing (100), the mounting cover (200) and the sealing core (300); a piston head (500) is fixedly mounted on the bottom end of the piston rod (400); The outer side of the sealing core (300) is sleeved with a syringe (600), the piston head (500) is slidably connected in the syringe (600), and a clamping assembly (700) is arranged inside the mounting cover (200), and the clamping assembly (700) is clamped on the outer wall of the top end of the syringe (600); A lifting drive member (900) is fixedly mounted on the top of the two groups of piston rods (400).

2. The nuclear medicine radiopharmaceutical injection device according to claim 1, characterized in that: The mounting cover (200) comprises an upper sealing cover (201), a first mounting ring (202), a second mounting ring (203), a third mounting ring (204), and a lower sealing ring (205) which are arranged in sequence from top to bottom; the upper sealing cover (201) is fixedly mounted on the bottom of the main housing (100); a flat surface is arranged on the front side of the third mounting ring (204); and a sliding groove (206) is provided through the front side of the third mounting ring (204); The diameter of the upper half of the sealing core (300) is smaller than the diameter of the lower half thereof, and the cross section of the sealing core (300) is in a "convex" shape; the top end of the sealing core (300) is fixedly mounted on the bottom of the upper cover (201); the mounting ring (202) is fixedly mounted on the outer wall of the upper half of the sealing core (300), and the top of the lower half of the sealing core (300) is attached to the bottom of the mounting ring (202); An annular socket is formed between the inner walls of the second mounting ring (203) and the lower sealing ring (205) and the outer wall of the sealing core (300), and the syringe (600) is inserted into the annular socket.

3. The nuclear medicine radiopharmaceutical injection device according to claim 1, characterized in that: The clamping assembly (700) comprises six groups of rollers (701) arranged in an array in the mounting ring three (204), a rotating shaft (702) is fixedly passed through the center of the rollers (701), and the two ends of the rotating shaft (702) are rotatably connected to the mounting ring two (203) and the lower sealing ring (205), respectively. The six groups of rollers (701) are connected by an annular belt (703), a slider (704) is fixedly installed on the front side of the annular belt (703), and the slider (704) is slidably connected to the slide groove (206), and a push button (705) is fixedly installed at the front end of the slider (704), and the push button (705) is connected to the plane part of the mounting ring three (204) through a bolt (706); A fixing ring (707) is fixedly installed at both ends of the rotating roller (701), a rotating arm (708) is fixedly installed on the circumferential surface of the fixing ring (707), a clamping column (709) is fixedly installed between the other ends of the two groups of rotating arms (708), and the clamping column (709) is attached to the outer wall of the syringe (600).

4. The nuclear medicine radiopharmaceutical injection device according to claim 3, characterized in that: An upper clamping ring (7011) and a lower clamping ring (7012) are fixedly mounted on the surface of the rotating roller (701), wherein the upper clamping ring (7011) is located above the lower clamping ring (7012), and the upper clamping ring (7011) and the lower clamping ring (7012) are clamped on the upper and lower sides of the annular belt (703). An array of latching teeth (7013) are fixed on the circumferential surface in the middle of the rotating roller (701), and latching grooves are equidistantly arranged on the inner side of the annular belt (703) corresponding to the latching teeth (7013).

5. The nuclear medicine radiopharmaceutical injection device according to claim 2, characterized in that: Two groups of rubber rings (301) are fixedly mounted on the circumferential surface of the lower half of the sealing core (300); an annular groove (302) is provided on the top of the lower half of the sealing core (300); adsorption holes (303) are arranged in an array on the circumferential surface of the lower half of the sealing core (300); the adsorption holes (303) are connected to the annular groove (302); and the adsorption holes (303) are located between the two groups of rubber rings (301); A suction channel is provided inside the first mounting ring (202), the suction channel is connected to the annular groove (302), and a negative pressure driving member (800) is provided inside the suction channel.

6. The nuclear medicine radiopharmaceutical injection device according to claim 5, characterized in that: The inner wall of the mounting ring 1 (202) is provided with two groups of arc-shaped grooves 1 (207), the arc-shaped grooves 1 (207) are connected to the annular groove (302), and the two groups of arc-shaped grooves 1 (207) are distributed on the left and right. The top of the mounting ring 1 (202) is provided with two groups of arc-shaped grooves 2 (208), and the two groups of arc-shaped grooves 2 (208) are distributed on the left and right. The arc-shaped groove 1 (207) and the arc-shaped groove 2 (208) on the same side are connected through a connecting hole (209), and the connecting hole (209) is located between the ends of the arc-shaped groove 1 (207) and the ends of the arc-shaped groove 2 (208), and the two groups of connecting holes (209) are symmetrical about the axis of the mounting ring 1 (202); The arc-shaped groove 1 (207), the arc-shaped groove 2 (208) and the connecting hole (209) form a suction flow channel.

7. The nuclear medicine radiopharmaceutical injection device according to claim 6, characterized in that: The negative pressure driving member (800) comprises a sliding plate (801) slidably connected in the arc-shaped groove (208), the sliding plate (801) divides the arc-shaped groove (208) into a cavity (1) and a cavity (2), the cavity (1) is connected to the connecting hole (209), and two groups of exhaust holes (806) are formed through the outer wall of the mounting ring (202), the exhaust holes (806) correspond to the sliding plate (801) one by one, and the exhaust holes (806) are connected to the cavity (2); The surface of the slide (801) facing the second cavity is fixedly mounted with an arc-shaped rack (802) and an arc-shaped slide bar (803), the arc-shaped rack (802) and the arc-shaped slide bar (803) are respectively attached to the two side walls of the second arc-shaped groove (208), a baffle (804) is fixedly mounted between the two side walls of the second arc-shaped groove (208), the baffle (804) is attached to the top of the arc-shaped rack (802) and the arc-shaped slide bar (803), and the arc-shaped rack (802) and the arc-shaped slide bar (803) are attached to the bottom of the second mounting ring (203); The arc-shaped rack (802) is meshed with a gear (805), wherein two rotating shafts (702) penetrate the second mounting ring (203) and are fixedly mounted at the bottom center of the gear (805).

8. The nuclear medicine radiopharmaceutical injection device according to claim 1, characterized in that: The lifting drive member (900) comprises a connecting plate (901), the top ends of the two groups of piston rods (400) are connected via the connecting plate (901), an arch seat (905) is fixedly mounted on the top of the connecting plate (901), and a cylinder (906) is fixedly mounted on the top of the arch seat (905).

9. The nuclear medicine radiopharmaceutical injection device according to claim 8, characterized in that: The lifting drive member (900) further comprises a frame-shaped plate (902) sleeved on the outside of the connecting plate (901), friction blocks (903) are fixedly mounted on both sides of the rear end of the frame-shaped plate (902), and a U-shaped rod (904) is fixedly mounted on the front end of the frame-shaped plate (902); Two groups of U-shaped plates (907) are fixedly mounted on the inner wall of the rear side of the main housing (100), and rubber sheets (908) are fixedly mounted on the front and rear side walls of the U-shaped plates (907) in an array, and a trapezoidal block 1 (909) and a trapezoidal block 2 (910) are fixedly mounted on the inner wall of the front side of the main housing (100), wherein the inclined surface of the trapezoidal block 1 (909) faces the rear side, and the inclined surface of the trapezoidal block 2 (910) faces the front side; When the frame-shaped plate (902) moves downward, the friction block (903) passes through the inside of the U-shaped plate (907).

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