Medicine injection device convenient for quantitative injection

Abstract

The invention provides a medicine injection device convenient for quantitative injection, and relates to the technical field of medicine injection devices, the medicine injection device is characterized in that a circle of positioning shaft rods are inserted in a stress ring in a surrounding and penetrating manner, and a row of scales representing the volume are arranged on the outer surface of one positioning shaft rod; a supporting ring is welded to the tail end of the circle of positioning shaft rod, and a lantern ring is welded to the head end of the circle of positioning shaft rod. Two puller bolts are symmetrically mounted on the lantern ring in a penetrating and screwing manner, and are used for jacking and positioning the whole positioning assembly; a push ring is fixed to the tail end of the piston push rod, the diameter of the push ring is larger than that of the supporting ring, and the push ring abuts against and makes contact with the supporting ring when sliding towards the syringe to drive the piston push rod and the piston head to inject nuclide medicine. The two puller bolts are used for tightly jacking and positioning the whole positioning assembly, the positioning assembly can slide up and down within the length range of the positioning shaft rod to be positioned at any position by the two puller bolts, any injection dosage is set within a certain degree, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of drug injection devices, and in particular to a drug injection device which is convenient for quantitative injection. Background Art

[0002] Radionuclide therapy can be used to treat many types of cancer, such as thyroid cancer, bone cancer, lymphoma, etc. Radionuclides can inhibit or control the growth of cancer cells by targeting tumor cells. Radionuclides such as iodine-131 can be used to treat hyperthyroidism and thyroid cancer. These nuclides are taken up into the thyroid tissue and destroy abnormal cells by releasing radioactive rays. Radionuclide therapy can be used to treat bone diseases such as bone metastatic cancer and myelodysplastic syndrome. The radioactive material can be absorbed by bone tissue, thereby relieving pain and slowing the progression of the disease. Radionuclide therapy can be used to treat hyperparathyroidism, in which the abnormal parathyroid glands are targeted for treatment, thereby reducing the level of calcium in the blood. Radionuclides need to be injected into the human body for therapeutic applications, which requires the use of a drug injection device.

[0003] Most existing drug injection devices lack a mechanism that can limit the piston movement stroke and quantitatively inject drugs, resulting in the injection volume being manually controlled during drug injection. Since it is difficult for humans to control the movement accuracy of the piston, it is difficult to grasp the injection dose, which is prone to insufficient or excessive doses. When the dose is insufficient, it is difficult to achieve the therapeutic effect, and when the dose is excessive, it will not only cause waste but also cause damage to the human body.

[0004] Although some devices are equipped with mechanisms that can limit the piston's travel and quantitatively inject drugs, these mechanisms have a low degree of adjustment freedom and can only be used to adjust a certain dose or several doses, and are not widely used. Summary of the invention

[0005] In view of this, the present invention provides a drug injection device that is convenient for quantitative injection, so as to solve the problem that although some devices are equipped with a mechanism that can limit the movement stroke of the piston and quantitatively inject the drug, these mechanisms have a low degree of adjustment freedom and can only be used for the adjustment of a certain dose or several doses, and are not widely used.

[0006] The technical solution proposed by the present invention is: a drug injection device convenient for quantitative injection, specifically comprising a syringe, a force ring and a piston push rod, the bottom of the syringe is formed with a force ring, and a piston push rod is slidably installed inside the syringe, and a piston head is detachably installed at the head end of the piston push rod, and the syringe is used for injecting radionuclide drugs;

[0007] A circle of positioning shafts is inserted and circumscribed through the stress ring, and a row of scales indicating capacity is provided on the outer surface of one of the positioning shafts, and the desired injection volume of the syringe can be set by means of the row of capacity scales; a supporting ring is welded at the tail end of a circle of the positioning shafts, and a sleeve is welded at the head end of a circle of the positioning shafts, and a circle of the positioning shafts, the supporting ring and the sleeve together form a cage-shaped positioning assembly; the sleeve is inserted and matched with the syringe, and two tightening bolts are symmetrically penetrated and screwed on the sleeve, and the two tightening bolts are used to tighten and position the entire positioning assembly, and the positioning assembly can slide up and down within the length range of the positioning shaft and be positioned at any position by the two tightening bolts, and any injection dose can be set within a certain degree;

[0008] A push ring is fixed to the tail end of the piston push rod, the diameter of the push ring is larger than the support ring, and the push ring slides toward the injection cylinder to drive the piston push rod and the piston head to inject the radionuclide medicine and abut against the support ring. The inner diameter of the support ring is larger than the outer diameter of the piston head, which makes it convenient to extract and disassemble the piston head for cleaning;

[0009] After being positioned by two tightening bolts, the positioning assembly is used to block and limit the movement distance of the push ring and the piston push rod to control the injection volume of the syringe, so that the syringe can accurately and quantitatively inject the drug. Compared with the existing technology that lacks a mechanism for quantitatively injecting drugs that can limit the movement stroke of the piston, it can avoid the situation of insufficient or excessive dosage, prevent the difficulty in achieving the therapeutic effect when the dosage is insufficient, and prevent waste and damage to the human body when the dosage is excessive;

[0010] The cage-shaped positioning assembly is movably installed with a circle of positioning shaft rods. When the radionuclide drugs stored in the syringe are sucked into the syringe, it can slide toward the head end of the syringe to free up the tail space of the syringe, so that the piston push rod can be pushed into the interior of the syringe to prepare for pull-back suction.

[0011] Furthermore, a driving ring is rotatably mounted on the top portion of the collar, and a circle of driving teeth is arranged around the bottom outer ring of the driving ring.

[0012] Furthermore, a gear-shaped knob is provided on the outer end of each of the two tightening bolts, and a circle of driving teeth is meshed with the two gear-shaped knobs for transmission, and the thickness of the gear-shaped knob is three times the length of the driving teeth. Through a circle of driving teeth, the collar can be rotatably engaged to drive the two gear-shaped knobs to rotate forward and reverse synchronously, thereby completing the tightening and loosening of the positioning assembly at one time, eliminating the trouble of rotating the two tightening bolts forward and reverse in steps to complete the tightening and loosening of the positioning assembly.

[0013] The thickness of the gear-shaped knob is three times the length of the driving tooth, so that the tooth groove on it has sufficient matching length with the driving tooth. When the tightening bolt is driven to slide inward and outward by positive and negative rotation, the gear-shaped knob will not follow the sliding and disengage from the driving tooth, causing power interruption, which helps to ensure the normal implementation of the synchronous rotation and tightening function of the two tightening bolts.

[0014] Furthermore, a ring groove is provided at the top end of the sleeve ring, and a rotating ring is fixed at the bottom inner side of the driving ring, and the rotating ring is rotatably matched with the ring groove.

[0015] Furthermore, an axial hole is opened at the center of the two tightening bolts, and an inserted shaft is slidably installed in the two axial holes through the pushing of a spring.

[0016] Furthermore, a circular push plate is welded to the outer end of each of the insertion shafts, and the two circular push plates protrude and are located on the outer sides of the two tightening bolts.

[0017] Furthermore, two positioning holes are symmetrically provided at the top position of the circumferential outer wall of the syringe, and the head ends of the two plug shafts are plugged into the two positioning holes correspondingly. The two plug shafts are installed by spring pushing. When the radionuclide drugs stored in the syringe are sucked into the syringe, the two plug shafts can be flexibly manually pushed out through two circular push plates to plug and hold the positioning assembly on the head end part of the syringe.

[0018] The two inserted shafts are normally hidden in the two tightening bolts, which can prevent the protruding supports from affecting the normal tightening and loosening functions of the two tightening bolts.

[0019] When the positioning assembly is positioned on the head end of the syringe, it and the two tightening bolts can act as a component to hold and position the syringe to facilitate the pulling and inserting of the piston push rod, thereby preventing the positioning assembly from wrapping around the syringe, making it inconvenient to hold the syringe and affecting the pulling and injection operation of the piston push rod.

[0020] Furthermore, an injection nozzle is provided at the center of the head end of the injection barrel.

[0021] Furthermore, the thickness of the sleeve ring is three times that of the supporting ring.

[0022] The present invention provides a drug injection device that is convenient for quantitative injection and has the following beneficial effects:

[0023] When the present invention is in use, the positioning assembly is positioned by two tightening bolts to block and limit the movement distance of the push ring and the piston push rod, control the advancement stroke of the piston push rod and the injection volume of the syringe, so that the syringe can accurately and quantitatively inject the drug. Compared with the existing technology that lacks a mechanism for quantitatively injecting drugs and can limit the movement stroke of the piston, it can avoid insufficient or excessive dosage, prevent the treatment effect from being difficult to achieve when the dosage is insufficient, and prevent waste and damage to the human body when the dosage is excessive.

[0024] In addition, two tightening bolts are used to tighten and position the entire positioning assembly. The positioning assembly can slide up and down within the length of the positioning shaft and be positioned at any position by the two tightening bolts. Any injection dose can be set within a certain range, and it is widely used.

[0025] The cage-shaped positioning assembly is movably installed with a circle of positioning shaft rods. When the radionuclide drugs stored in the syringe are sucked into the syringe, it can slide toward the head end of the syringe to free up the tail space of the syringe, so that the piston push rod can be pushed into the interior of the syringe to prepare for pull-back suction.

[0026] Through a circle of driving teeth, the collar can be rotatably engaged to drive the two gear-shaped knobs to rotate forward and reverse synchronously, thereby completing the tightening and loosening of the positioning component at one time, eliminating the trouble of rotating the two tightening bolts forward and reverse in steps to complete the tightening and loosening operation of the positioning component. This helps to simplify the tightening and loosening operation steps of the positioning component and is convenient to use.

[0027] The two plug shafts are installed by spring push-up. When the radionuclide drugs are stored in the syringe, the two plug shafts can be flexibly pushed out manually through the two circular push plates to insert and hold the positioning component on the head end of the syringe. Compared with temporarily tightening the positioning component by screwing the two tightening bolts, the operation is simpler and easier to use. The two plug shafts are hidden in the two tightening bolts under normal circumstances, which can prevent the protruding supports from affecting the normal tightening and loosening functions of the two tightening bolts.

[0028] The thickness of the gear-shaped knob is three times the length of the driving tooth, so that the tooth groove on it has sufficient matching length with the driving tooth. When the tightening bolt is driven to slide inward and outward by positive and negative rotation, the gear-shaped knob will not follow the sliding and disengage from the driving tooth, causing power interruption, which helps to ensure the normal implementation of the synchronous rotation and tightening function of the two tightening bolts.

[0029] In addition, when the positioning assembly is positioned on the head end of the syringe, it and the two tightening bolts can act as a component to hold and position the syringe to facilitate the pulling and inserting of the piston push rod, thereby avoiding the positioning assembly being wrapped around the syringe, making it inconvenient to hold the syringe and affecting the pulling and injection operation of the piston push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0031] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0032] In the attached picture:

[0033] Figure 1 The overall structural schematic diagram of the present invention is shown;

[0034] Figure 2 The overall bottom side structural schematic diagram of the present invention is shown;

[0035] Figure 3 A schematic diagram of the inner side structure of a half-section of the injection barrel of the present invention is shown;

[0036] Figure 4 A schematic diagram of the support ring structure of the present invention is shown;

[0037] Figure 5 A schematic diagram of the bottom structure of the collar of the present invention is shown;

[0038] Figure 6 A schematic diagram of the drive ring structure of the present invention is shown;

[0039] Figure 7 A schematic diagram of the structure of the tightening bolt of the present invention is shown;

[0040] Figure 8 A schematic diagram of the inner side structure of a half-section of a tightening bolt of the present invention is shown;

[0041] Fig. 9 A schematic diagram of the upward sliding state of the collar of the present invention is shown;

[0042] Reference numerals list

[0043] 1. Injection barrel; 101. Stress ring; 102. Positioning hole;

[0044] 2. Piston push rod; 201. Push ring; 202. Piston head;

[0045] 3. Positioning shaft; 301. Driving ring; 302. Rotating ring; 303. Ring groove; 304. Support ring; 305. Sleeve ring;

[0046] 4. Tightening bolt; 401. Gear-shaped knob; 402. Shaft hole;

[0047] 5. Insert shaft; 501. Round push plate. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0049] Example 1, please refer to Figures 1 to 9

[0050] The present invention provides a drug injection device that is convenient for quantitative injection, comprising a syringe 1, a force ring 101 and a piston push rod 2. The bottom of the syringe 1 is formed with the force ring 101, and the piston push rod 2 is slidably installed inside the syringe 1. The head end of the piston push rod 2 is detachably installed with a piston head 202. The syringe 1 is used for injecting radionuclide drugs.

[0051] A circle of positioning shaft rods 3 is inserted and circumscribed through the force ring 101, and a row of scales indicating capacity is provided on the outer surface of one of the positioning shaft rods 3, and the desired injection volume of the syringe 1 can be set by relying on the row of capacity scales; a supporting ring 304 is welded at the tail end of the circle of positioning shaft rods 3, and a collar 305 is welded at the head end of the circle of positioning shaft rods 3, and the circle of positioning shaft rods 3, the supporting ring 304 and the collar 305 together constitute a cage-shaped positioning component; the collar 305 is inserted and matched with the syringe 1, and two tightening bolts 4 are symmetrically penetrated and screwed on the collar 305, and the two tightening bolts 4 are used to tighten and position the entire positioning component, and the positioning component can slide up and down within the length range of the positioning shaft rod 3 and be positioned at any position by the two tightening bolts 4, and any injection dose can be set within a certain degree, and it is widely used;

[0052] A push ring 201 is fixed to the rear end of the piston push rod 2. The diameter of the push ring 201 is larger than the support ring 304. When the push ring 201 slides toward the syringe 1 to drive the piston push rod 2 and the piston head 202 to inject the nuclide drug, it abuts against the support ring 304. The inner diameter of the support ring 304 is larger than the outer diameter of the piston head 202, which makes it easy to remove and disassemble the piston head 202 for cleaning.

[0053] After being positioned by two tightening bolts 4, the positioning assembly is used to block and limit the moving distance of the push ring 201 and the piston push rod 2, control the advancing stroke of the piston push rod 2 and the injection volume of the syringe 1, so that the syringe 1 can accurately and quantitatively inject the drug. Compared with the existing technology that lacks a mechanism for quantitatively injecting drugs that can limit the piston movement stroke, it can avoid the situation of insufficient or excessive dosage, prevent the difficulty in achieving the therapeutic effect when the dosage is insufficient, and prevent waste and damage to the human body when the dosage is excessive;

[0054] The cage-shaped positioning assembly is movably and slidably installed with a circle of positioning shaft rod 3. When the stored radionuclide medicine is sucked into the syringe 1, it can slide toward the head end of the syringe 1 to vacate the tail space of the syringe 1, so that the piston push rod 2 can be pushed into the inside of the syringe 1 to prepare for pulling back and sucking.

[0055] Specifically, the driving ring 301 is rotatably mounted on the top portion of the collar 305 , and a circle of driving teeth is arranged around the bottom outer ring of the driving ring 301 .

[0056] Specifically, a gear-shaped knob 401 is provided at the outer end of each of the two tightening bolts 4, and a circle of driving teeth is engaged with the two gear-shaped knobs 401 for transmission, and the thickness of the gear-shaped knob 401 is three times the length of the driving teeth. Through a circle of driving teeth, the collar 305 can be rotatably engaged to drive the two gear-shaped knobs 401 to rotate forward and reverse synchronously, thereby completing the tightening and loosening of the positioning assembly at one time, eliminating the trouble of rotating the two tightening bolts 4 forward and reverse in steps to complete the tightening and loosening operation of the positioning assembly, thereby helping to simplify the tightening and loosening operation steps of the positioning assembly and facilitating use.

[0057] The thickness of the gear-shaped knob 401 is three times the length of the driving tooth, so that the tooth groove on it has a sufficient matching length with the driving tooth, so that when the tightening bolt 4 is driven by forward and reverse rotation to slide inward and outward, the gear-shaped knob 401 will not follow the sliding and disengage from the driving tooth, causing power interruption, which helps to ensure the normal implementation of the synchronous rotation tightening function of the two tightening bolts 4.

[0058] Specifically, a ring groove 303 is formed at the top portion of the collar 305 , and a rotating ring 302 is fixed at the bottom side of the driving ring 301 , and the rotating ring 302 is rotatably matched with the ring groove 303 .

[0059] Specifically, an injection nozzle is provided at the center of the head end of the injection barrel 1 .

[0060] Specifically, the thickness of the collar 305 is three times that of the supporting ring 304 .

[0061] Based on the first embodiment, the second embodiment:

[0062] An axial hole 402 is formed at the center of the two tightening bolts 4 , and an insert shaft 5 is slidably installed through the two axial holes 402 by spring pushing.

[0063] A circular push plate 501 is welded to the outer end of each insertion shaft 5 , and the two circular push plates 501 protrude and are located outside the two tightening bolts 4 .

[0064] Specifically, two positioning holes 102 are symmetrically opened at the top position of the circumferential outer wall of the syringe 1, and the head ends of the two plug shafts 5 are plugged into the two positioning holes 102 correspondingly. The two plug shafts 5 are installed by spring pushing. When the radionuclide drugs stored in the syringe 1 are sucked into the syringe 1, the two plug shafts 5 can be flexibly manually pushed out through two circular push plates 501 to plug and hold the positioning assembly on the head end part of the syringe 1. Compared with temporarily tightening the positioning assembly by screwing the two tightening bolts 4, the operation and use are simpler.

[0065] The two inserted shafts 5 are normally hidden in the two tightening bolts 4, which can prevent the protruding supports from affecting the normal tightening and loosening functions of the two tightening bolts 4.

[0066] When the positioning component is positioned on the head end of the syringe 1, it and the two tightening bolts 4 can serve as components for holding and positioning the syringe 1 to facilitate the pulling and inserting of the piston push rod 2, thereby preventing the positioning component from wrapping around the syringe 1, making it inconvenient to hold the syringe 1 and affecting the pulling and injection operation of the piston push rod 2.

[0067] The working principle of this embodiment is as follows: two tightening bolts 4 are used to tighten and position the entire positioning assembly. After the positioning assembly is positioned by the two tightening bolts 4, it is used to block and limit the movement distance of the push ring 201 and the piston push rod 2, control the advancement stroke of the piston push rod 2 and the injection volume of the syringe 1, so that the syringe 1 can accurately and quantitatively inject the drug.

[0068] The positioning assembly can slide up and down within the length of the positioning shaft rod 3 and be positioned at any position by two tightening bolts 4. Any injection dose can be set within a certain range. The desired injection volume of the syringe 1 can be set by relying on a row of capacity scales. The positioning assembly is movably and slidably installed with a circle of positioning shaft rod 3. When the radionuclide drug stored in the syringe 1 is sucked into the syringe 1, it can slide toward the head end of the syringe 1 to vacate the tail space of the syringe 1, so that the piston push rod 2 can be pushed into the inside of the syringe 1 to prepare for pull-back suction.

[0069] The two insertion shafts 5 are installed by spring pushing. When the radionuclide drugs are stored in the syringe 1, the two insertion shafts 5 can be flexibly pushed out manually through the two circular pushing plates 501 to insert and hold the positioning component on the head end of the syringe 1. When the positioning component is positioned on the head end of the syringe 1, it and the two tightening bolts 4 can serve as components for holding and positioning the syringe 1 to facilitate the pulling and pulling of the piston push rod 2.

[0070] In this article, there are a few points to note:

[0071] 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0072] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0073] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A drug injection device for convenient quantitative injection, comprising: An injection barrel (1), a stress ring (101) and a piston push rod (2), wherein the bottom of the injection barrel (1) is formed with a stress ring (101), and the piston push rod (2) is slidably mounted inside the injection barrel (1), and a piston head (202) is detachably mounted at the head end of the piston push rod (2), and the injection barrel (1) is used for injecting radionuclide drugs; The invention is characterized in that a circle of positioning shaft rods (3) is inserted and installed around and through the force ring (101), and a row of scales indicating the capacity is provided on the outer surface of one of the positioning shaft rods (3); a supporting ring (304) is welded at the tail end of a circle of the positioning shaft rods (3), and a sleeve (305) is welded at the head end of a circle of the positioning shaft rods (3); a circle of the positioning shaft rods (3), the supporting ring (304) and the sleeve (305) together constitute a cage-shaped positioning component; the sleeve (305) is inserted and matched with the injection cylinder (1), and two tightening bolts (4) are symmetrically inserted and screwed on the sleeve (305), and the two tightening bolts (4) are used to tighten and position the entire positioning component; A push ring (201) is fixed to the rear end of the piston push rod (2), the diameter of the push ring (201) is larger than the support ring (304), and the push ring (201) is in contact with the support ring (304) when sliding toward the injection cylinder (1) to drive the piston push rod (2) and the piston head (202) to inject the radionuclide medicine; After being positioned by two tightening bolts (4), the positioning assembly is used to block and limit the displacement distance of the push ring (201) and the piston push rod (2) to control the injection volume of the injection cylinder (1).

2. A drug injection device for quantitative injection according to claim 1, characterized in that: A driving ring (301) is rotatably mounted on the top portion of the collar (305), and a circle of driving teeth is arranged around the bottom outer ring of the driving ring (301).

3. A drug injection device for convenient quantitative injection according to claim 2, characterized in that: The outer ends of the two tightening bolts (4) are each provided with a gear-shaped knob (401), a circle of driving teeth meshes with the two gear-shaped knobs (401) for transmission, and the thickness of the gear-shaped knob (401) is three times the length of the driving teeth.

4. A drug injection device for convenient quantitative injection according to claim 2, characterized in that: The top portion of the sleeve ring (305) is provided with an annular groove (303), and a rotating ring (302) is fixed at the bottom side of the driving ring (301), and the rotating ring (302) is rotatably matched with the annular groove (303).

5. A drug injection device for convenient quantitative injection according to claim 1, characterized in that: An axial hole (402) is provided at the center of the two tightening bolts (4), and an insert shaft (5) is slidably installed in each of the two axial holes (402) through spring pushing.

6. A drug injection device for quantitative injection according to claim 5, characterized in that: A circular push plate (501) is welded to the outer end of each insertion shaft (5), and the two circular push plates (501) protrude from the outer sides of the two tightening bolts (4).

7. A drug injection device for quantitative injection according to claim 1, characterized in that: Two positioning holes (102) are symmetrically provided at the top end of the circumferential outer wall of the injection barrel (1), and the head ends of the two insertion shafts (5) are correspondingly plugged into the two positioning holes (102).

8. A drug injection device for convenient quantitative injection according to claim 1, characterized in that: An injection nozzle is arranged at the center of the head end of the injection barrel (1).

9. A drug injection device for convenient quantitative injection according to claim 1, characterized in that: The thickness of the collar (305) is three times that of the supporting ring (304).

Images