CN105879159B - A reusable syringe and its working method - Google Patents
A reusable syringe and its working method Download PDFInfo
- Publication number
- CN105879159B CN105879159B CN201610202568.0A CN201610202568A CN105879159B CN 105879159 B CN105879159 B CN 105879159B CN 201610202568 A CN201610202568 A CN 201610202568A CN 105879159 B CN105879159 B CN 105879159B
- Authority
- CN
- China
- Prior art keywords
- metering
- pipe
- adjusting
- injection
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
- A61M5/3007—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules with specially designed jet passages at the injector's distal end
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a reusable syringe and a working method thereof, wherein the syringe automatically injects liquid medicine by utilizing the thrust of a potential energy spring, and comprises a push rod, the potential energy spring, a metering and adjusting threaded pipe, a metering and adjusting ratchet connecting rod, a metering and adjusting coil pipe, a positioning fixture block, a nut pipe, a fixed pipe, a screw rod, a needle head, an injection pipe pre-filled with medicament and an injection sleeve pipe, wherein the needle head is contacted with the skin, the liquid medicine flows out, the resistance at the front end of a pressure head is reduced, the potential energy spring pushes the push rod forwards, the metering and adjusting ratchet connecting rod rotates anticlockwise to drive the coil pipe and the positioning fixture block to rotate anticlockwise together, then the positioning fixture block drives the screw rod to rotate, the screw rod moves forwards, a piston in the injection pipe is pushed to move forwards through the pressure head, and the liquid medicine is extruded from the needle head. The invention utilizes the thrust of the potential energy spring to push the liquid medicine forward and automatically inject the liquid medicine. The multi-hole needle head is provided with a plurality of needle holes, so that single multi-hole injection can be realized, and single-point pain of a patient during liquid medicine injection can be relieved.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a reusable injector and a working method thereof.
Background
The needle-free injector is a pressure injection device, and its principle is that the spring in the injector is released to produce strong power to quickly push the liquid medicine in the front end ampoule of the injector, and the liquid medicine passes through the micropores in the front end of the ampoule, instantaneously passes through the surface cell in the form of liquid needle, and permeates into subcutaneous tissue to complete injection. Its advantages are no fear of needle to be injected and no pain.
For example, the chinese invention patent CN101829381A discloses a disposable insulin injection pen with adjustable metering, which comprises a cap, a needle, an injection tube with a piston inside and a medicament pre-filled, an injection sleeve, a positioning fixture block, a screw, a nut tube, a fixed tube, a coil, a clutch tube, a scale locator and a button, when in use, the cap sleeved outside the injection sleeve is pulled out, at this time, the end face teeth of the clutch tube are separated from the tooth grooves in the coil under the action of a clutch spring, the rotating handle of the coil extending out of the tail of the fixed tube is rotated forward, the elastic ratchet head at the front end of the nut tube is coupled with the reverse direction of the fixed tube to make the scale locating groove in the coil slide relative to the elastic arm chuck of the scale locator, the coil drives the clutch tube to move outward a metering unit along the axial direction every time the elastic arm chuck slides through a scale locating groove, the coil surface scale of the fixed tube is observed through the window of the fixed tube until the required injection amount, and then the rotating handle is stopped, completing metering adjustment; after the injector is accurately adjusted, the end face of the button is pressed by hand, the pressure of the clutch spring is overcome, so that the end face teeth on the clutch tube are meshed with the tooth grooves of the coil tube, the coil tube rotates reversely to drive the clutch tube and the nut tube to rotate, so that the screw rod pushes and extrudes the piston in the injection tube forward, and the injection is injected into a human body from the needle head. A user can observe 0-60 unit scales on the surface of the coil from a window of the fixed pipe in the metering adjusting process. When the patient injects insulin, the pen cap is directly taken down without installing injection, and the injection can be used by adjusting the injection amount, so that the use is convenient. However, after the injection in the injection tube is completely extruded, the screw cannot retreat because the elastic ratchet head of the nut tube is reversely meshed with the ratchet of the fixed tube, so the injection tube is disposable and cannot be reused. For another example, chinese patent CN103170038A discloses an insulin injection pen, which comprises a pen cap, a needle, an injection tube with a piston inside and a medicament pre-filled in, an injection sleeve, a positioning fixture block, a screw, a nut tube, a fixed tube, a coil and a button, wherein when in use, the pen cap sleeved outside the injection sleeve is pulled out, the rotary handle is rotated leftwards to a required scale, the coil and the rotary handle rotate together, and at this time, a rotary spring with one end connected with the rotary handle is twisted and deformed to generate tension. Meanwhile, the coil pipe is limited by the positioning clamping block and only rotates between the two positioning clamping feet on the positioning clamping block, when the coil pipe is limited by the positioning clamping feet, the coil pipe stops rotating, at the moment, the button is pressed down to enable the return force of the rotary spring, the return force of the rotary spring drives the rotary handle to reset and rotate, and then the coil pipe resets and rotates under the rotation of the rotary handle. When pressing the button, the annular external member level moves left, and make clutch spring be in compression state, the step complete segregation on annular external member and the nut pipe this moment, the rotation that resets of coil pipe drives the nut pipe and rotates together, the rotation of nut pipe drives the screw rod that has set up the external screw thread and rotates, parallel tangent plane through the screw rod both sides turns into thrust with the revolving force, thereby make the screw rod produce the ascending displacement of axial direction, and then promote the feeding of pressure head and piston, it makes the injection follow syringe needle inject into in the human body to promote the intraductal piston of extrusion injection. The invention is convenient to use and carry, and can realize repeated insulin injection with accurate control and metering by repeatedly adjusting the positioning fixture block, the rotary spring and the clutch spring. But the invention can only realize quantitative injection, can not steplessly adjust metering, has small application range, and the screw of the invention can not retreat, thus being disposable and can not be reused.
Therefore, the existing insulin injection pen is disposable, needs to be discarded after use, is serious in resource waste, and urgently needs to design an injector which can be used for stepless regulation and metering, single-tube multiple injection, single-time multiple-point administration and repeated use of an injector body.
Disclosure of Invention
The invention aims to provide an injector which can realize stepless regulation and metering, single-tube multi-time injection, single-time multi-point administration and reusable injector body and a working method thereof.
In order to solve the above technical problems, embodiments of the present invention provide a reusable syringe that automatically injects a liquid medicine using a thrust of a potential energy spring.
The reusable injector comprises a push rod, a potential energy spring, a metering and adjusting threaded pipe, a metering and adjusting ratchet connecting rod, a metering and adjusting coil pipe, a positioning clamping block, a nut pipe, a fixed pipe, a screw rod, a needle head, an injection pipe pre-filled with a medicament and an injection sleeve pipe, wherein the needle head, the injection sleeve pipe and the fixed pipe are sequentially and detachably connected in sequence from front to back, the injection pipe is arranged in the injection sleeve pipe, the rear end of the injection pipe is sealed through a piston, and the nut pipe is coaxially and fixedly arranged on the inner side of the fixed pipe;
the screw is in threaded connection with the internal thread of the nut tube, partial threads are respectively cut off from two sides of the screw along the axial direction to form two first guide grooves along the axial direction, a pressure head is arranged at the front end of the screw, and the pressure head is positioned on the rear side of the piston;
the positioning fixture block is arranged at the rear side of the nut pipe and sleeved outside the screw rod, a first guide key matched with a first guide groove key groove is correspondingly arranged in a central hole of the positioning fixture block, the spiral pipe is sleeved outside the screw rod, and the front end of the spiral pipe is detachably clamped with the rear end of the positioning fixture block through a ratchet;
the front end of the metering and adjusting threaded pipe is clamped with the rear end of the fixed pipe, a spiral groove is formed in the inner side of the metering and adjusting threaded pipe, the metering and adjusting spiral pipe is in threaded connection with the inner side of the metering and adjusting threaded pipe through a spiral rib on the outer cylindrical surface, and a third annular boss extending inwards is arranged at an opening at the front end of the metering and adjusting spiral pipe;
the metering adjusting ratchet connecting rod sleeve is arranged between the metering adjusting coil and the coil, the front end of the metering adjusting ratchet connecting rod is detachably connected with the third annular boss in a clamped mode, the metering adjusting ratchet connecting rod is connected with the coil in a sliding mode, the push rod is arranged on the rear side of the metering adjusting ratchet connecting rod, the outer side of the coil is arranged on the front portion of the push rod in a sleeved mode, and the rear end of the push rod is provided with the potential energy spring.
The reusable injector further comprises a metering adjusting outer tube, the metering adjusting outer tube is sleeved on the outer side of the metering adjusting threaded tube, a fourth annular boss extending inwards is arranged at the rear end of the metering adjusting outer tube, an insertion hole is formed in the fourth annular boss, a guide hole is formed in the inner side of the fourth annular boss, and the rear portion of the push rod extends out of the guide hole;
a step is arranged on the outer side of the push rod, and the potential energy spring is arranged between the step and the fourth annular boss;
and the rear end face of the metering adjusting coil is provided with an inserting tongue inserted with the inserting hole.
The reusable injector further comprises a metering adjusting ratchet which is arranged between the third annular boss and the metering adjusting ratchet connecting rod, and the front end of the metering adjusting ratchet is detachably clamped with the rear end of the third annular boss through the ratchet;
the front end of the metering adjusting ratchet connecting rod is detachably clamped with the rear end of the metering adjusting ratchet through a ratchet.
The reusable injector also comprises a fixing piece and a positioning piece, wherein the positioning piece is sleeved outside the coil pipe, and a buffer spring is arranged between the positioning piece and the coil pipe;
the outer side of the coil pipe is sleeved with the fixing piece, and the front end of the fixing piece is detachably clamped with the rear end of the positioning block through a ratchet.
Furthermore, two fixing piece convex blocks are symmetrically arranged on the outer peripheral surface of the fixing piece, and a screwed pipe bayonet connected with the fixing piece convex blocks in a clamping mode is arranged on the metering adjusting screwed pipe.
Furthermore, partial cylindrical surfaces of two sides of the coil pipe are respectively cut off along the axial direction to form two second guide grooves along the axial direction, and second guide keys matched with the second guide groove key grooves are arranged on the inner wall of the metering adjusting ratchet connecting rod.
The multi-hole needle head is of a cap type structure, a ball valve mounting hole is formed in the center of the top of the multi-hole needle head, a plurality of needle holes are uniformly distributed in the top of the outer side of the ball valve mounting hole, and the cap edge of the multi-hole needle head is detachably connected with the front end of the injection sleeve;
the conical needle is fixedly arranged on the inner side of the porous needle head, the rear end of the conical needle is provided with a needle point, the front end of the conical needle is provided with a counter bore with a straight front cone and a straight rear cone, and a medicament hole communicated with the counter bore is arranged in the needle point;
the rear end of the sealing ring is fixedly arranged in the straight hole section of the counter bore, the sealing ring is provided with a sealing ring center hole with a front straight cone and a rear cone, and the front end of the sealing ring is provided with a liquid outlet groove;
the outer cylindrical surface of the spherical valve comprises a cylindrical surface positioned at the front part and a conical surface positioned at the rear part, the cylindrical surface is in sliding connection with the spherical valve mounting hole and a straight hole section of the sealing ring center hole, the conical surface is in sealing fit with the conical hole section of the sealing ring center hole, a ball valve counter bore is arranged at the rear end of the spherical valve, and a return spring is arranged in the ball valve counter bore.
Wherein, a transparent observation window is arranged on the injection sleeve.
And the fixed pipe and the metering adjusting threaded pipe support are provided with clutch springs for controlling the screw rod to reset.
The invention also provides a working method of the injector, which comprises the following steps:
(1) loading and unloading of liquid medicine: rotating the injection sleeve pipe anticlockwise, opening the threaded connection between the injection sleeve pipe and the fixed pipe, filling the injection pipe into the injection sleeve pipe, and then rotating the injection sleeve pipe clockwise to screw the injection sleeve pipe on the fixed pipe;
(2) metering and adjusting: the metering adjusting outer pipe is rotated clockwise, the metering adjusting coil pipe rotates clockwise along with the metering adjusting outer pipe due to the inserting relation of the inserting tongue and the inserting hole, the metering adjusting threaded pipe clamped with the fixed pipe does not move, and the metering adjusting coil pipe is rotated to a stop position to finish metering adjustment;
(3) and (3) injection process: the spherical valve is pressed backwards after contacting with skin and is separated from the sealing ring, liquid medicine flows into the sealing ring through a medicine hole of the conical needle and then flows between the porous needle head and the conical needle through the liquid outlet groove, the liquid medicine flows out, the resistance at the front end of the pressure head is reduced, the potential energy spring pushes the push rod forwards, the metering and adjusting ratchet connecting rod rotates anticlockwise, the coil pipe is driven to rotate anticlockwise together under the matching action of the second guide groove and the second guide key groove, the coil pipe drives the positioning fixture block to rotate together through the ratchet, the positioning fixture block drives the screw rod to rotate through the matching of the first guide key and the key groove of the first guide groove, the screw rod moves forwards relative to the nut pipe, the piston in the injection pipe is pushed to move forwards through the pressure head, and the liquid medicine is extruded from the needle head;
(4) replacing the injection tube: the injection sleeve pipe is rotated anticlockwise, threaded connection between the injection sleeve pipe and the fixed pipe is opened, the pressure head is pressed backwards, the push rod is pulled backwards, the screw rod rotates clockwise and retreats to the original position, and the injection pipe can be replaced.
In the step (2), in the process of metering adjustment, the metering adjustment coil pipe can drive the metering adjustment ratchet to rotate clockwise, but due to the existence of the potential energy spring and the incapability of rotating the screw rod, the connecting rod of the metering adjustment ratchet cannot rotate and only retreats;
after the metering adjustment is finished, the push rod cannot be pushed forwards due to the existence of the ratchet and the incapability of rotating the screw rod;
in the step, in the injection process, the metering adjusting ratchet connecting rod drives the metering adjusting coil pipe and the metering adjusting outer pipe to rotate and return counterclockwise together through the metering adjusting ratchet;
whether the metering of adjusting is injected or not can be completed by keeping the needle away from the skin at any time, the spherical valve returns under the action of the return spring and is tightly matched with the sealing ring, and the liquid medicine stops flowing out to stop injection.
The technical scheme of the invention has the following beneficial effects:
1. the invention utilizes the thrust of the potential energy spring to push the liquid medicine forward and automatically inject the liquid medicine.
2. According to the invention, through the matching of the metering adjusting outer tube and the metering adjusting coil, the metering adjusting coil can be driven to rotate relative to the metering adjusting threaded tube by applying torque force to the metering adjusting outer tube, the rotation to the stop position is a dose adjustment, and the liquid medicine in a needle tube can be injected after being adjusted and metered for multiple times, so that the metering adjustment of the injector and the multiple injection of a single tube are realized.
3. The multi-hole needle head is provided with a plurality of needle holes, so that single multi-hole injection can be realized, and single-point pain of a patient during liquid medicine injection can be relieved.
Drawings
FIG. 1 is an exploded view of a first embodiment of the present invention;
FIG. 2 is a sectional view of the first embodiment;
FIG. 3 is a schematic view of the screw and ram of the first embodiment after assembly;
FIG. 4 is an enlarged view illustrating a structure of a positioning fixture block according to an embodiment;
FIG. 5 is a schematic structural diagram of a coil according to an embodiment;
FIG. 6 is an enlarged view of a fixing sheet according to the first embodiment;
FIG. 7 is a first schematic structural view of a metering adjustment threaded pipe according to a first embodiment;
FIG. 8 is a first schematic structural view of a metering coil in accordance with a first embodiment;
FIG. 9 is a schematic structural view of a metering ratchet connecting rod in the first embodiment;
FIG. 10 is a schematic structural view of a metering adjusting outer tube in the first embodiment;
FIG. 11 is an enlarged view of the multi-hole needle according to the first embodiment;
FIG. 12 is an enlarged view of the structure of a tapered needle according to the first embodiment;
FIG. 13 is an enlarged view of the seal ring according to the first embodiment;
FIG. 14 is an enlarged schematic view of a ball valve according to a first embodiment;
fig. 15 is a schematic structural view of a needle cannula according to an embodiment.
Description of reference numerals:
1. a push rod;
2. a potential energy spring;
3. a metering adjusting outer tube; 300. a fourth annular boss; 301. a jack; 302. a guide hole; 4. a metering adjustment threaded pipe; 401. a helical groove; 402. a threaded pipe bayonet;
5. a metering adjustment ratchet connecting rod; 501. a second guide key;
6. a metering adjustment ratchet;
7. a metering adjustment coil; 700. a spiral rib; 701. a third annular boss; 704. inserting a tongue; 8. a fixing sheet; 803. fixing the lug on the sheet;
9. positioning blocks;
11. a buffer spring;
12. coiling; 1202. a second guide groove;
13. positioning a fixture block; 1300. a first guide key; (ii) a
14. A nut tube;
15. a fixed tube;
16. a screw; 1600. a first guide groove;
17. a pressure head;
18. an injection cannula; 1800. a transparent viewing window;
19. a tapered needle; 1900. a needle tip; 1901. a counter bore; 1902. a medicament aperture;
20. a seal ring; 2000. a central hole of the sealing ring; 2001. a liquid outlet groove;
21. a porous needle; 2100. a ball valve mounting hole; 2101. a pinhole; 2102. a needle head counter bore;
22. a ball valve; 2200. a cylindrical surface; 2201. a conical surface; 2202. a ball valve counterbore.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an injector capable of adjusting metering, single-tube multiple injection and single-time multipoint administration, aiming at the problems that the existing injector is a disposable product, needs manual injection and the like.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a reusable injector, which includes a needle, an injection tube prefilled with a medicament, an injection cannula 18, a fixing tube 15, a nut tube 14, a screw rod 16, a positioning fixture block 13, a coil tube 12, a push rod 1, a potential energy spring 2, a metering adjustment outer tube 3, a metering adjustment threaded tube 4, a metering adjustment ratchet connecting rod 5, a metering adjustment ratchet 6, a metering adjustment coil tube 7, a fixing piece 8, a positioning block 9, and a buffer spring 11, wherein,
the needle is connected with the front end of the injection sleeve 18;
the injection tube is arranged in the injection sleeve 18, and the rear end of the injection tube is sealed by a piston;
the rear end of the injection sleeve 18 is screwed with the front end of the fixed tube 15.
The nut pipe 14 is coaxially and fixedly arranged on the inner side of the fixed pipe 15. The fixed tube 15 is provided with a button.
The screw 16 is in threaded connection with the internal thread of the nut tube 14, partial threads are respectively cut off from two sides of the screw 16 along the axial direction to form two first guide grooves 1600 along the axial direction, the front end of the screw 16 is provided with a pressure head 17, and the pressure head 17 is positioned on the rear side of the piston, as shown in fig. 3.
As shown in fig. 4, the positioning fixture block 13 is disposed at the rear side of the nut tube 14 and sleeved outside the screw 16, and a first guide key 1300 engaged with the key slot of the first guide groove 1600 is correspondingly disposed in the central hole of the positioning fixture block 13.
As shown in fig. 5, the coil tube 12 is disposed at the rear side of the positioning fixture block 13 and sleeved outside the screw 16, a ratchet is disposed between the front end of the coil tube 12 and the positioning fixture block 13, and two axial second guide grooves 1202 are formed by respectively cutting off partial cylindrical surfaces at two sides of the coil tube 12 along the axial direction.
The positioning block 9 is sleeved outside the coil pipe 12, and the buffer spring 11 is arranged between the positioning block 9 and the coil pipe 12.
As shown in fig. 6, the fixing piece 8 is disposed at the rear side of the positioning block 9 and sleeved outside the coil 12, a ratchet is disposed between the front end of the fixing piece 8 and the positioning block 9, and two fixing piece protrusions 803 are symmetrically disposed on the outer circumferential surface of the fixing piece 8.
As shown in fig. 7, the front end of the metering and adjusting threaded pipe 4 is connected with the rear end of the fixed pipe 15 in a clamping manner, the inner side of the metering and adjusting threaded pipe 4 is provided with a spiral groove 401, and the metering and adjusting threaded pipe 4 is provided with a threaded pipe bayonet 402 connected with a fixing piece bump 803 in a clamping manner. The front end of the metering adjusting threaded pipe 4 is provided with a button bayonet connected with the button in a clamped mode.
As shown in fig. 8, the metering adjustment coil 7 is screwed to the inner side of the metering adjustment threaded pipe 4 through a spiral rib 700 on the outer cylindrical surface, a third annular boss 701 extending inward is provided at the front end opening of the metering adjustment coil 7, and an insertion tongue 704 is provided on the rear end surface of the metering adjustment coil 7.
The metering adjusting ratchet 6 is sleeved between the metering adjusting coil pipe 7 and the coil pipe 12, and a ratchet is arranged between the front end of the metering adjusting ratchet 6 and the third annular boss 701.
As shown in fig. 9, the metering adjustment ratchet connecting rod 5 is disposed at the rear side of the metering adjustment ratchet 6 and sleeved between the metering adjustment coil pipe 7 and the coil pipe 12, a ratchet is disposed between the front end of the metering adjustment ratchet connecting rod 5 and the rear end of the metering adjustment ratchet 6, and a second guide key 501 which is in key-groove fit with the second guide groove 1202 is disposed on the inner wall of the metering adjustment ratchet connecting rod 5.
The push rod 1 is arranged at the rear side of the metering adjusting ratchet connecting rod 5, and the front part of the push rod 1 is sleeved between the metering adjusting coil pipe 7 and the coil pipe 12.
As shown in fig. 10, the metering adjustment outer tube 3 is sleeved outside the metering adjustment threaded tube 4, a fourth annular boss 300 extending inward is disposed at the rear end of the metering adjustment outer tube 3, an insertion hole 301 for inserting the insertion tongue 704 is disposed on the fourth annular boss 300, a guide hole 302 is disposed inside the fourth annular boss 300, and the rear portion of the push rod 1 extends out of the guide hole 302.
The outer side of the push rod 1 is provided with a step, and the potential energy spring 2 is arranged between the step and the fourth annular boss 300.
The needle comprises a porous needle head 21, a conical needle 19, a sealing ring 20 and a ball valve 22, wherein,
the multi-hole needle 21 is of a cap type structure, a ball valve mounting hole 2100 is formed in the center of the top of the multi-hole needle, a plurality of needle holes 2101 are evenly distributed in the top of the outer side of the ball valve mounting hole 2100, and the cap edge of the multi-hole needle 21 is in threaded connection with the front end of the injection sleeve, as shown in fig. 11.
The conical needle 19 is fixedly arranged at the inner side of the multi-hole needle head 21, the rear end of the conical needle 19 is provided with a needle tip 1900, the front end of the conical needle 19 is provided with a counter bore 1901 which is straight in front and tapered in back, and a medicament hole 1902 communicated with the counter bore 1901 is arranged in the needle tip 1900, as shown in fig. 12.
The rear end of the sealing ring 20 is fixedly arranged in a straight hole section of the counter bore 1901, a sealing ring center hole 2000 with a straight front cone and a straight rear cone is arranged on the sealing ring 20, and a liquid outlet groove 2001 is arranged at the front end of the sealing ring 20, as shown in fig. 13.
The outer cylindrical surface of the globe valve 22 includes a cylindrical surface 2200 at the front and a conical surface 2201 at the rear, the cylindrical surface 2200 is slidably connected with a straight hole section of the globe valve mounting hole 2100 and the sealing ring central hole 2000, the conical surface 2201 is in sealing fit with a conical hole section of the sealing ring central hole 2000, a globe valve counter bore 2202 is arranged at the rear end of the globe valve, and a return spring is arranged in the globe valve counter bore 2202, as shown in fig. 14.
The working principle of the needle head is as follows: the sealing ring 20 is tightly matched in a small diameter hole of a straight hole section of the counter bore 1901 of the conical needle 19, a return spring is arranged at the rear part of the spherical valve 22, during injection, the spherical valve 22 is pressed backwards after contacting with skin and is separated from the sealing ring 20, liquid medicine flows into the sealing ring 20 through the medicine hole 1902 of the conical needle 19, then flows into a space between the porous needle head 21 and the conical needle 19 through the liquid outlet groove 2001, and then permeates into a human body through 22 32G needle holes 2101; after the injection is finished, the needle head leaves the skin, the ball valve 22 returns under the action of the return spring and is tightly matched with the sealing ring 20, and the liquid medicine stops flowing out.
As shown in fig. 15, a transparent observation window 1800 is provided on the ampoule casing 18.
The embodiment of the invention further provides a working method of the reusable injector, which comprises the following steps:
a. loading and unloading of liquid medicine: the injection tube 18 is rotated counter-clockwise, the screw connection with the fastening tube 15 is opened, the injection tube is inserted into the injection tube 18, and the injection tube 18 is then rotated clockwise and screwed onto the fastening tube 15.
b. Metering and adjusting: the metering adjusting outer pipe 3 is rotated clockwise, the metering adjusting coil pipe 7 rotates clockwise along with the metering adjusting outer pipe 3 due to the inserting relation between the inserting tongue 704 and the inserting hole 301, the metering adjusting threaded pipe 4 clamped with the fixed pipe 15 does not move, and the metering adjusting coil pipe 7 rotates to the stop position to finish metering adjustment.
In the metering and adjusting process, the metering and adjusting coil pipe 7 can drive the metering and adjusting ratchet 6 to rotate clockwise, but because the potential energy spring 2 and the screw 16 cannot rotate, the metering and adjusting ratchet connecting rod 5 cannot rotate and only can retreat.
After the metering adjustment is completed, the push rod 1 is not pushed forwards by the thrust generated by the potential energy spring 2 due to the existence of the ratchet and the non-rotation of the screw 16.
c. And (3) injection process: syringe needle contact skin, the liquid medicine flows, the resistance of pressure head 17 front end diminishes, potential energy spring 2 promotes push rod 1 forward, 5 anticlockwise rotations of ratchet connecting rod are adjusted in the measurement, under second guide way 1202 and second guide key 501 keyway combined action, it is anticlockwise rotatory together to drive coil 12, coil 12 drives location fixture block 13 through the ratchet and rotates together, location fixture block 13 drives screw rod 16 rotatory through the keyway cooperation of first guide key 1300 and first guide way 1600, screw rod 16 is for 14 forward movements of nut pipe, promote the intraductal piston antedisplacement of injection through the pressure head, the liquid medicine is extruded from the syringe needle.
During the injection process, the metering adjusting ratchet connecting rod 5 drives the metering adjusting coil pipe 7 and the metering adjusting outer pipe 3 to rotate anticlockwise together through the metering adjusting ratchet 6.
The injection can be stopped at any time by moving the needle away from the skin and stopping the flow of the medical liquid, regardless of whether the adjusted metering is completed or not.
d. And (3) repeated use: the injection sleeve 18 is rotated anticlockwise, the threaded connection between the injection sleeve and the fixed tube 15 is opened, the pressure head 17 is pressed backwards, the push rod 1 is pulled backwards, the screw 16 rotates clockwise and retreats to the original position, and the injection tube can be replaced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. A reusable syringe is characterized in that the pushing force of a potential energy spring is utilized to automatically inject liquid medicine;
the reusable injector comprises a push rod (1), a potential energy spring (2), a metering and adjusting threaded pipe (4), a metering and adjusting ratchet connecting rod (5), a metering and adjusting coil pipe (7), a coil pipe (12), a positioning clamping block (13), a nut pipe (14), a fixed pipe (15), a screw rod (16), a needle, an injection pipe pre-filled with a medicament and an injection sleeve pipe (18), wherein the needle, the injection sleeve pipe (18) and the fixed pipe (15) are sequentially and detachably connected in the front and at the back, the injection pipe is arranged in the injection sleeve pipe (18), the rear end of the injection pipe is sealed through a piston, and the nut pipe (14) is coaxially and fixedly arranged on the inner side of the fixed pipe (15);
the screw (16) is in threaded connection with the internal thread of the nut pipe (14), partial threads are respectively cut off from two sides of the screw (16) along the axial direction to form two first guide grooves (1600) along the axial direction, and the front end of the screw (16) is provided with a pressure head (17) positioned on the rear side of the piston;
the positioning clamping block (13) is arranged at the rear side of the nut tube (14) and sleeved outside the screw rod (16), a first guide key (1300) matched with a key groove of the first guide groove (1600) is correspondingly arranged in a central hole of the positioning clamping block (13), the coil tube (12) is sleeved outside the screw rod (16), and the front end of the coil tube (12) is detachably clamped with the rear end of the positioning clamping block (13);
the front end of the metering adjusting threaded pipe (4) is clamped with the rear end of the fixed pipe (15), a spiral groove (401) is formed in the inner side of the metering adjusting threaded pipe (4), the metering adjusting coil (7) is in threaded connection with the inner side of the metering adjusting threaded pipe (4) through a spiral rib (700) on the outer cylindrical surface, and a third annular boss (701) extending inwards is arranged at an opening at the front end of the metering adjusting coil (7);
the metering adjusting ratchet connecting rod (5) is sleeved between the metering adjusting coil (7) and the coil (12), the front end of the metering adjusting ratchet connecting rod (5) is detachably clamped with the third annular boss (701), the metering adjusting ratchet connecting rod (5) is slidably clamped with the coil (12), the push rod (1) is arranged on the rear side of the metering adjusting ratchet connecting rod (5), the front portion of the push rod (1) is sleeved on the outer side of the coil (12), and the rear end of the push rod (1) is provided with the potential energy spring (2);
the reusable injector further comprises a metering adjusting outer pipe (3), the metering adjusting outer pipe (3) is sleeved on the outer side of the metering adjusting threaded pipe (4), a fourth annular boss (300) extending inwards is arranged at the rear end of the metering adjusting outer pipe (3), a jack (301) is arranged on the fourth annular boss (300), a guide hole (302) is formed in the inner side of the fourth annular boss (300), and the rear portion of the push rod (1) extends out of the guide hole (302);
a step is arranged on the outer side of the push rod (1), and the potential energy spring (2) is arranged between the step and the fourth annular boss (300);
the rear end face of the metering adjusting coil (7) is provided with an inserting tongue (704) inserted with the inserting hole (301);
the reusable injector further comprises a metering adjusting ratchet (6), the metering adjusting ratchet (6) is arranged between the third annular boss (701) and the metering adjusting ratchet connecting rod (5), and the front end of the metering adjusting ratchet (6) is detachably clamped with the rear end of the third annular boss (701);
the front end of the metering adjusting ratchet connecting rod (5) is detachably clamped with the rear end of the metering adjusting ratchet (6);
the reusable injector also comprises a fixing piece (8) and a positioning block (9), the positioning block (9) is sleeved outside the coil pipe (12), and a buffer spring (11) is arranged between the positioning block (9) and the coil pipe (12);
the fixing piece (8) is sleeved outside the coil pipe (12), and the front end of the fixing piece (8) is detachably clamped with the rear end of the positioning block (9);
two sides of the coil (12) are respectively cut off partial cylindrical surfaces along the axial direction to form two second guide grooves (1202) along the axial direction, and a second guide key (501) matched with a key groove of the second guide grooves (1202) is arranged on the inner wall of the metering adjustment ratchet connecting rod (5);
the needle head comprises a porous needle head (21), a conical needle (19), a sealing ring (20) and a ball valve (22), wherein,
the multi-hole needle head (21) is of a cap type structure, a ball valve mounting hole (2100) is formed in the center of the top of the multi-hole needle head, a plurality of needle holes (2101) are uniformly distributed in the top of the outer side of the ball valve mounting hole (2100), and the cap edge of the multi-hole needle head (21) is detachably connected with the front end of the injection sleeve;
the conical needle (19) is fixedly arranged on the inner side of the porous needle head (21), the rear end of the conical needle (19) is provided with a needle point (1900), the front end of the conical needle is provided with a counter bore (1901) which is straight in front and conical in back, and a medicament hole (1902) communicated with the counter bore (1901) is arranged in the needle point (1900);
the rear end of the sealing ring (20) is fixedly arranged in a straight hole section of the counter bore (1901), a sealing ring center hole (2000) with a front straight cone and a rear cone is formed in the sealing ring (20), and a liquid outlet groove (2001) is formed in the front end of the sealing ring (20);
the outer cylindrical surface of the spherical valve (22) comprises a cylindrical surface (2200) positioned at the front part and a conical surface (2201) positioned at the rear part, the cylindrical surface (2200) is in sliding connection with a straight hole section of a spherical valve mounting hole (2100) and a sealing ring center hole (2000), the conical surface (2201) is in sealing fit with a conical hole section of the sealing ring center hole (2000), a ball valve counter bore (2202) is arranged at the rear end of the spherical valve, and a return spring is arranged in the ball valve counter bore (2202);
the working method of the reusable injector comprises the following steps:
(1) loading and unloading of liquid medicine: rotating the injection sleeve (18) anticlockwise, opening the threaded connection between the injection sleeve and the fixed tube (15), loading the injection tube into the injection sleeve (18), and then rotating the injection sleeve (18) clockwise to be screwed on the fixed tube (15);
(2) metering and adjusting: the metering adjusting outer pipe (3) is rotated clockwise, the metering adjusting coil (7) rotates clockwise along with the metering adjusting outer pipe (3) due to the inserting relation of the inserting tongue (704) and the inserting hole (301), the metering adjusting threaded pipe (4) clamped with the fixed pipe (15) is fixed, and the metering adjusting coil (7) is rotated to a stopping position to finish metering adjustment;
(3) and (3) injection process: the ball valve (22) is pressed backwards after contacting with skin and is separated from the sealing ring (20), liquid medicine flows into the sealing ring (20) through a medicine hole (1902) of the conical needle (19) and then flows into a space between the porous needle head (21) and the conical needle (19) through the liquid outlet groove (2001), the liquid medicine flows out, the resistance of the front end of the pressure head (17) is reduced, the potential energy spring (2) pushes the push rod (1) forwards, the metering and adjusting ratchet connecting rod (5) rotates anticlockwise, the spiral tube (12) is driven to rotate anticlockwise together under the matching action of the second guide groove (1202) and the keyway of the second guide key (501), the spiral tube (12) drives the ratchet positioning clamping block (13) to rotate together through the driving of the ratchet, the positioning clamping block (13) drives the screw rod (16) to rotate through the cooperation of the keyway of the first guide key (1300) and the first guide groove (1600), and the screw rod (16) moves forwards relative to the nut tube (14), the piston in the injection tube is pushed to move forwards by the pressure head, and the liquid medicine is extruded from the needle head;
(4) replacing the injection tube: the injection tube sleeve (18) is rotated anticlockwise, the threaded connection between the injection tube sleeve and the fixed tube (15) is opened, the pressure head (17) is pressed backwards, the push rod (1) is pulled backwards, the screw rod (16) rotates clockwise and retreats to the original position, and the injection tube can be replaced.
2. The reusable syringe according to claim 1, wherein the outer peripheral surface of the fixing plate (8) is symmetrically provided with two fixing plate protrusions (803), and the metering adjustment threaded tube (4) is provided with a threaded tube bayonet (402) which is clamped with the fixing plate protrusions (803).
3. The reusable syringe according to claim 1, characterized in that in step (2), during the metering adjustment, the metering adjustment coil (7) drives the metering adjustment ratchet (6) to rotate clockwise, but due to the existence of the potential energy spring (2) and the non-rotation of the screw (16), the metering adjustment ratchet connecting rod (5) will not rotate and only retreat;
after the metering adjustment is finished, the push rod (1) cannot be pushed forwards due to the existence of the ratchet and the incapability of rotating the screw (16) and the thrust generated by the potential energy spring (2);
in the step (3), in the injection process, the metering adjusting ratchet connecting rod (5) drives the metering adjusting coil pipe (7) and the metering adjusting outer pipe (3) to rotate and return counterclockwise together through the metering adjusting ratchet (6);
regardless of whether the injection of the adjusted metering is finished, the needle head can be kept away from the skin at any time, the spherical valve (22) returns under the action of the return spring and is tightly matched with the sealing ring (20), and the liquid medicine stops flowing out to stop the injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202568.0A CN105879159B (en) | 2016-04-01 | 2016-04-01 | A reusable syringe and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202568.0A CN105879159B (en) | 2016-04-01 | 2016-04-01 | A reusable syringe and its working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105879159A CN105879159A (en) | 2016-08-24 |
| CN105879159B true CN105879159B (en) | 2022-03-11 |
Family
ID=57011958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610202568.0A Expired - Fee Related CN105879159B (en) | 2016-04-01 | 2016-04-01 | A reusable syringe and its working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105879159B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215288A (en) * | 2016-09-28 | 2016-12-14 | 江苏德尔福医疗器械有限公司 | The adjustable fixed-quantity injector of aerofluxus |
| CN107823759A (en) * | 2017-12-25 | 2018-03-23 | 徐州仁和医疗科技有限公司 | A kind of efficient needleless injector |
| US11839748B2 (en) | 2018-09-07 | 2023-12-12 | Cc Biotechnology Corporation | Plunging apparatus for syringe |
| CN109663177B (en) * | 2019-01-30 | 2025-05-02 | 中山汇丰医用包装科技有限公司 | End point control method of syringe and syringe thereof |
| CN109999403B (en) * | 2019-05-07 | 2023-12-29 | 江苏领康电子科技发展有限公司 | Quick detach formula rope skipping |
| CN111110958B (en) * | 2020-02-06 | 2021-08-17 | 唐文珍 | Syringe used in medical field |
| CN112641531A (en) * | 2020-11-25 | 2021-04-13 | 中国人民解放军陆军军医大学第二附属医院 | Subcutaneous injection device |
| CN112891804B (en) * | 2021-02-07 | 2022-05-20 | 钟星建设集团有限公司 | Magnetic early warning formula fire control shower nozzle is used in wisdom fire control |
| CN114870160B (en) * | 2022-03-31 | 2024-05-31 | 宁波睿爱产品设计有限公司 | Injection syringe |
| CN115400290B (en) * | 2022-09-01 | 2023-08-04 | 四川省医学科学院·四川省人民医院 | Insulin injection device |
| CN116726316B (en) * | 2023-05-31 | 2024-05-17 | 上海新耀湃科医疗科技股份有限公司 | Dosed injection pen and method of use thereof |
| WO2024243882A1 (en) * | 2023-05-31 | 2024-12-05 | 群康生技股份有限公司 | Injection mechanism capable of adjusting injection dose, and injection syringe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829381A (en) * | 2010-04-07 | 2010-09-15 | 邓源基 | Disposable insulin injection pen with adjustable metering |
| CN202314915U (en) * | 2011-11-07 | 2012-07-11 | 宋执光 | Scalp administration device |
| CN203090099U (en) * | 2013-02-22 | 2013-07-31 | 杭州金源生物技术有限公司 | Insulin injection pen |
| CA2930020A1 (en) * | 2013-11-14 | 2015-05-21 | Ares Trading S.A. | Medicine injection device with a pain-reduction member |
| CN204745211U (en) * | 2015-04-09 | 2015-11-11 | 遵义医学院附属医院 | Insulin syringe |
-
2016
- 2016-04-01 CN CN201610202568.0A patent/CN105879159B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829381A (en) * | 2010-04-07 | 2010-09-15 | 邓源基 | Disposable insulin injection pen with adjustable metering |
| CN202314915U (en) * | 2011-11-07 | 2012-07-11 | 宋执光 | Scalp administration device |
| CN203090099U (en) * | 2013-02-22 | 2013-07-31 | 杭州金源生物技术有限公司 | Insulin injection pen |
| CA2930020A1 (en) * | 2013-11-14 | 2015-05-21 | Ares Trading S.A. | Medicine injection device with a pain-reduction member |
| CN204745211U (en) * | 2015-04-09 | 2015-11-11 | 遵义医学院附属医院 | Insulin syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105879159A (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105879159B (en) | A reusable syringe and its working method | |
| CN101829381B (en) | Disposable insulin injection pen with adjustable metering | |
| CN103170038B (en) | Insulin injection pen | |
| CN108607136B (en) | Quantitative injection pen with hidden injection needle | |
| RU2520158C2 (en) | Liquid drug delivery device | |
| RU2520159C2 (en) | Indication mechanism for automatic applicator, particularly for insulin | |
| CN103041476B (en) | Adjustable metering syringe | |
| CN105477745B (en) | Injection pen capable of adjusting dosage and being repeatedly used for multiple times | |
| CN203017504U (en) | Adjustable Metering Syringes | |
| CN201324413Y (en) | Quantitative adjustable pen type injector | |
| CN202223679U (en) | Automatic controller for insulin painless injection | |
| CN107875487B (en) | High-precision pen type injector | |
| CN107050575B (en) | Pen type injector capable of being repeatedly used | |
| CN112569431A (en) | Safe needleless injector with external dose display function | |
| CN109663177B (en) | End point control method of syringe and syringe thereof | |
| CN203090099U (en) | Insulin injection pen | |
| WO2019029123A1 (en) | Injection pen capable of fine adjustment | |
| CN112237663B (en) | Multi-scale liquid medicine injection pen | |
| CN210813165U (en) | Disposable precision quantitative injector | |
| CN212439610U (en) | Needleless injector | |
| CN111150905B (en) | Automatic injection device | |
| CN113274586A (en) | Syringe capable of quantitatively outputting fluid | |
| CN214181344U (en) | Multi-scale liquid medicine injection pen | |
| US20180085536A1 (en) | Locking Device for a Syringe | |
| CN205698744U (en) | A kind of reusable syringe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Workshop 601-3, 6th Floor, Jinhong Industrial Park (Workshop I), No. 72, Jinhong 4th Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province, 519000 Patentee after: Zhuhai Aohua Fuwei Medical Technology Co.,Ltd. Address before: 214142-2, building C, airport Life Science Park, No. 35, Changjiang South Road, new area, Wuxi City, Jiangsu Province Patentee before: YUANRONG BIOLOGICAL PHARMACEUTICAL Co.,Ltd. WUXI |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220311 |