CN111529830B - Stable drug delivery device starts - Google Patents
Stable drug delivery device starts Download PDFInfo
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- CN111529830B CN111529830B CN202010441305.1A CN202010441305A CN111529830B CN 111529830 B CN111529830 B CN 111529830B CN 202010441305 A CN202010441305 A CN 202010441305A CN 111529830 B CN111529830 B CN 111529830B
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- rodless cavity
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- 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
-
- 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
- A61M5/31—Details
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- 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 relates to the technical field of medical equipment, in particular to a stable-starting drug delivery device, which comprises a cylinder body with a piston cavity, a piston, a pressing mechanism and a seal head assembly, wherein a rodless cavity is formed between the seal head assembly and the piston; the invention utilizes the arrangement of the gas core and the exhaust hole to directly exhaust the trace gas remained in the rodless cavity through the exhaust hole, thereby realizing that the piston can have relatively stable starting firing pressure; and the required sealing points are reduced, even if a little air leakage exists between the piston and the air flow channel of the seal head assembly, the air is discharged from the air outlet, and the normal firing of the piston is not influenced, so that the sealing difficulty between the piston and the seal head assembly is greatly reduced, and meanwhile, the failure rate is also reduced.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a stable-starting drug delivery device.
Background
Along with the development of science and technology, china becomes one of the few countries capable of producing needleless injectors worldwide, and mainly utilizes the high-pressure jet principle to enable liquid medicine to form thinner liquid flow to instantaneously penetrate skin to reach the subcutaneous part, so that the injection has the advantages of uniform liquid medicine diffusion, quick acting time, high medicine absorption rate, small wound and the like;
For pneumatic needleless injectors, it is particularly important how to ensure that the pneumatic needleless injector has a relatively constant activation pressure;
the existing pneumatic needleless injector is easy to have the problem of unstable starting firing pressure, such as a drug administration device disclosed in Chinese patent document with publication number of CN110841150A, and has the following defects:
The first, the gas energy storage cavity 5 is equal to the pressure of the rodless cavity 1-2 in the first assembly, after the first starting firing, a certain amount of gas remains in the rodless cavity 1-2, so that the pressure in the rodless cavity 1-2 is slightly greater than the pressure in the gas energy storage cavity 5, and the pressure of the second starting firing is reduced compared with the pressure of the first starting firing; however, after a period of time, the gas in the rodless cavity 5 gradually permeates out, so that the gas pressure in the rodless cavity 5 is close to the gas pressure during the first assembly, and the starting firing pressure is increased relative to the pressure during the second firing, thereby bringing great trouble to the actual use and being incapable of accurately controlling the starting pressure;
secondly, there are three places that need sealing, and the sealing point is many, specifically is: the sealing position between the sealing head 8 and the energy storage plug 9, the sealing position between the one-way gasket 10 and the exhaust hole 9-2 of the energy storage plug 9 and the sealing position between the energy storage plug 9 and the sealing piece 7 can cause starting locking failure if only one sealing position is leaked, and the failure rate can be increased certainly after the three sealing positions are accumulated although the failure rate is not frequent.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problems of unstable starting firing pressure and more sealing points of the drug delivery device in the prior art, the drug delivery device with stable starting is provided.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a start stable dosing device, includes barrel, piston, hold-down mechanism and the head subassembly that has the piston chamber, the piston slides and sets up in the piston intracavity, form the rodless chamber between head subassembly and the piston, the head subassembly has air current passageway, gas core and is used for the exhaust hole with external and rodless chamber intercommunication, the piston supports the head subassembly under hold-down mechanism's effect, with this shutoff of the export of air current passageway, after the gas energy storage in the air current passageway to its pressure overcome hold-down mechanism to the effort of piston, form the piston and fire, air current passageway and rodless chamber intercommunication, the gas core is set up and can overcome the presupposed resistance back exhaust hole of gas core under the compressed gas pressure in the rodless chamber and remove, and shutoff it; when the pressure of the gas in the rodless cavity to the gas core is smaller than the preset resistance, the gas core is far away from the exhaust hole, and the exhaust hole is opened.
In the scheme, by utilizing the arrangement of the air core and the exhaust hole, the residual trace gas in the rodless cavity can be directly exhausted through the exhaust hole, so that the pressure in the rodless cavity is always consistent with the atmospheric pressure, after the gas in the gas flow channel is stored to the set pressure, the high-speed gas flow instantaneously rushes into the rodless cavity, the air core is pushed to the exhaust hole to seal the exhaust hole, and the piston is driven by the high-speed gas flow to finish starting and firing, so that the piston can have relatively stable starting and firing pressure; and the required sealing points are reduced, even if a little air leakage exists between the piston and the air flow channel of the seal head assembly, the air is discharged from the air outlet, and the normal firing of the piston is not influenced, so that the sealing difficulty between the piston and the seal head assembly is greatly reduced, and meanwhile, the failure rate is also reduced.
Further, the seal head assembly comprises a seal head, the seal head is fixed at the upper end of the cylinder body, the rodless cavity is formed between the seal head and the piston, a sliding hole is formed in the seal head, the air core is inserted into the sliding hole, a gap is reserved between the air core and the sliding hole, the rodless cavity is communicated with the exhaust hole through the gap, the exhaust hole is positioned at the outer end of the sliding hole, and the rodless cavity is positioned at the inner end of the sliding hole; the trace gas remained in the rodless cavity reaches the exhaust hole after passing through the gap between the gas core and the sliding hole, and is directly discharged from the exhaust hole.
Further, a magnetic force absorbing member is fixed to the inner end of the sliding hole for absorbing air to the inner end of the sliding hole.
Further, the sliding hole has a gas discharge spring therein for pushing the gas core toward an inner end of the sliding hole.
Further, the outer end of the sliding hole is provided with a sealing piece; therefore, when the piston starts to fire, the air core can better seal the exhaust hole.
Further, the inner end of the air core is provided with a conical part, the small end of the conical part is close to the rodless cavity, and the large end of the conical part is close to the exhaust hole; or the inner end of the air core is provided with a thin section, and the outer diameter of the outer end of the air core is larger than the outer diameter of the thin section; or the inner end of the air core is provided with a magnetism isolating gasket. The suction force between the air core and the magnet can be adjusted by the measures; wherein, set up toper portion or set up the thin section on the gas core and all be through the area of contact between change gas core and the magnet to realize the regulation of suction, if utilize the tip and the magnet contact of toper portion on the gas core, can reduce the adsorption affinity between magnet and the same.
Further, the seal head is in threaded connection with an air tap, the air tap is internally provided with the air flow channel, the air tap is provided with a flank, and the magnetic force absorbing part is clamped and fixed between the flank and the seal head.
Further, a sealing glue or a raw material tape is wound at the threaded connection part between the air tap and the seal head.
Further, the sections of the air core and the sliding hole are circular, the axis of the sliding hole is parallel to the axis of the rodless cavity, and the difference between the inner diameter of the sliding hole and the outer diameter of the air core is 0.02mm-0.3mm; the larger the magnetic force, the smaller the gap. Or the larger the force of the exhaust spring, the smaller the gap.
Further, the compressing mechanism comprises an elastic element, the elastic element is arranged in the piston cavity, and the piston is pushed by the elastic force of the elastic element to prop against the seal head assembly; or the compressing mechanism comprises a magnetic element, the magnetic element is arranged in the seal head assembly, and the piston is propped against the seal head assembly under the magnetic attraction of the magnetic element.
The beneficial effects of the invention are as follows: the stable starting and dosing device of the invention utilizes the arrangement of the air core and the exhaust hole to directly exhaust the trace gas remained in the rodless cavity through the exhaust hole, thereby realizing that the piston can have relatively stable starting and firing pressure; and the required sealing points are reduced, even if a little air leakage exists between the piston and the air flow channel of the seal head assembly, the air is discharged from the air outlet, and the normal firing of the piston is not influenced, so that the sealing difficulty between the piston and the seal head assembly is greatly reduced, and meanwhile, the failure rate is also reduced.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic cross-sectional view of a priming stable drug delivery device of the present invention;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1A;
fig. 3 is a schematic cross-sectional view of a stable-start drug delivery device in example 2 of the present invention.
In the figure: 1. the device comprises a cylinder body, 2, a piston cavity, 3, a piston, 3-1, a piston rod, 4, a rodless cavity, 5, an air tap, 5-1, an air flow channel, 5-2, a flank, 6, a seal head, 6-1, an exhaust hole, 6-2, a sliding hole, 6-3, a gap, 7, an air core, 7-1, a conical part, 8, a magnetic absorption part, 9, a sealing piece, 10, an exhaust spring, 11, an elastic element, 12, a joint, 13, a sealing gasket, 14, a push rod, 15 and a medicine core.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1 and 2, a stable drug delivery device is started, which comprises a cylinder body 1 with a piston cavity 2, a piston 3, a pressing mechanism and a seal head assembly, wherein the piston 3 is arranged in the piston cavity 2 in a sliding way, a rodless cavity 4 is formed between the seal head assembly and the piston 3, the seal head assembly is provided with an air flow channel 5-1, an air core 7 and an exhaust hole 6-1 used for communicating the outside with the rodless cavity 4, the piston 3 is propped against the seal head assembly under the action of the pressing mechanism, so that the outlet of the air flow channel 5-1 is blocked, when the air in the air flow channel 5-1 is stored until the pressure of the air in the air flow channel overcomes the acting force of the pressing mechanism on the piston 3, the piston 3 is formed, the air flow channel 5-1 is triggered, the air core 7 is communicated with the rodless cavity 4, and the air core 7 is arranged to move towards the exhaust hole 6-1 after overcoming the preset resistance of the air core 7 under the pressure in the rodless cavity 4, and the outlet is blocked; when the pressure of the gas in the rodless cavity 4 to the gas core 7 is smaller than the preset resistance, the gas core 7 is far away from the exhaust hole 6-1, and the exhaust hole 6-1 is opened.
The seal head assembly comprises a seal head 6, the seal head 6 is fixed at the upper end of the cylinder body 1, a rodless cavity 4 is formed between the seal head 6 and the piston 3, a sliding hole 6-2 is formed in the seal head 6, a gas core 7 is inserted into the sliding hole 6-2, a gap 6-3 is reserved between the gas core 7 and the sliding hole 6-2, the rodless cavity 4 is communicated with an exhaust hole 6-1 through the gap 6-3, the exhaust hole 6-1 is positioned at the outer end of the sliding hole 6-2, and the rodless cavity 4 is positioned at the inner end of the sliding hole 6-2; the trace gas remaining in the rodless chamber 4 reaches the exhaust hole 6-1 through the gap 6-3 between the gas core 7 and the slide hole 6-2, and is directly discharged from the exhaust hole 6-1.
In this embodiment, the air core 7 is configured to move toward the exhaust hole 6-1 after overcoming a preset resistance under the pressure of the air flow in the rodless cavity 4, where the preset resistance overcome when the air core 7 moves may be magnetic force or elastic force, and in this embodiment, the preset resistance is magnetic force, and the preset resistance is elastic force, which is described in embodiment 2;
When the preset resistance existing when the air core 7 moves is magnetic force: a magnetic force absorbing part 8 is fixed at the inner end of the sliding hole 6-2 and is used for absorbing the air core 7 to the inner end of the sliding hole 6-2, and the air core 7 is fixed on the magnetic force absorbing part 8 through magnetic force absorption; specifically, the following embodiments may be provided, one of which is: the air core 7 is made of ferromagnetic material, the magnetic force absorbing part 8 is a magnet, and the air core 7 is absorbed on the magnet through magnetic force; the second step is: the magnetic force absorbing piece 8 is made of ferromagnetic materials, a magnet is fixed on the air core 7, and the magnet fixed on the air core 7 is magnetically absorbed on the magnetic force absorbing piece 8; the third is: the magnetic force absorbing part 8 is a magnet, the magnet is also fixed on the air core 7, and the magnet on the air core 7 and the air core 7 are fixed on the magnetic force absorbing part 8 through magnetic force absorption.
The outer end of the sliding hole 6-2 is provided with a sealing piece 9; here, the sealing member 9 may be an O-ring, and the exhaust hole 6-1 is located inside the O-ring; so that the air core 7 can better seal the exhaust hole 6-1 when the piston 3 starts firing.
The inner end of the air core 7 is provided with a conical part 7-1, the small end of the conical part 7-1 is close to the rodless cavity 4, and the large end of the conical part 7-1 is close to the exhaust hole 6-1; or the inner end of the air core 7 is provided with a thin section, and the outer diameter of the outer end of the air core 7 is larger than the outer diameter of the thin section; or a magnetism isolating gasket is arranged at the inner end of the air core 7. The suction force between the air core 7 and the magnet can be adjusted by the measures; wherein, the air core 7 is provided with a conical part 7-1 or a thin section, and the suction force is adjusted by changing the contact area between the air core 7 and the magnet.
The end socket 6 is in threaded connection with an air tap 5, the air tap 5 is internally provided with an air flow channel 5-1, the air tap 5 is provided with a side wing 5-2, and the magnetic force absorbing part 8 is clamped and fixed between the side wing 5-2 and the end socket 6; the magnetic force absorbing member 8 can be easily installed and fixed.
The thread joint between the air tap 5 and the seal head is provided with sealant or wound with a raw material tape; the threaded connection between the group air tap 5 and the seal head 6 is completely blocked, so that leakage is avoided; the seal head 6 can be fixed on the cylinder body 1 by screw threads, and the screw thread connection part between the seal head 6 and the cylinder body 1 can be provided with sealant or wound with a raw material belt, so that the screw thread connection part between the cylinder body 1 and the seal head 6 is completely sealed, and leakage is avoided.
The sections of the air core 7 and the sliding hole 6-2 are circular, the axis of the sliding hole 6-2 is parallel to the axis of the rodless cavity 4, and the difference between the inner diameter of the sliding hole 6-2 and the outer diameter of the air core 7 is 0.02mm-0.3mm.
The difference between the inner diameter of the slide hole 6-2 and the outer diameter of the air core 7 in this embodiment is preferably 0.1mm.
The pressing mechanism in the embodiment comprises an elastic element 11, wherein the elastic element 11 is arranged in the piston cavity 2, the piston 3 is pushed to prop against the seal head assembly under the elastic force of the elastic element 11, the elastic element 11 can be a spring, one end of the elastic element 11 props against the cylinder 1, and the other end of the elastic element props against the piston 3;
Or the compressing mechanism in the embodiment comprises a magnetic element, the magnetic element is arranged in the seal head assembly, the piston 3 is provided with a structure capable of being absorbed by the magnetic element, and the piston 3 is propped against the seal head assembly under the magnetic absorption of the magnetic element.
In this embodiment, the piston 3 is provided with a sealing pad 13, the air tap 5 abuts against the sealing pad 13, and the sealing pad 13 may be made of rubber.
The working principle of this embodiment is as follows:
When in use, the medicine core 15 filled with medicine liquid is connected to the front end of the cylinder body 1, and the piston rod 3-1 on the piston 3 in the cylinder body 1 is opposite to the push rod 14 in the medicine core 15; then the air source is communicated with the connector 12 on the seal head 6, the connector 12 is communicated with the air flow channel 5-1 in the air tap 5, then the air source starts to introduce compressed air into the air flow channel 5-1, when the pressure of the air in the air flow channel 5-1 is raised to a preset percussion pressure, the elasticity of the elastic element 11 can be overcome, the air in the air flow channel 5-1 is instantaneously flushed into the rodless cavity 4, the air core 7 is pushed to the exhaust hole 6-1 to seal the exhaust hole 6-1, the piston 3 is driven by high-speed air flow to complete starting percussion, so that the piston 3 moves forward rapidly, the push rod 14 is pushed by the piston rod 3-1 to spray the medicine liquid in the medicine core 15 at a high speed in a thin liquid flow, and the medicine liquid instantaneously penetrates through the skin to reach the skin to complete injection.
The air core 7 and the exhaust hole 6-1 are provided, so that after the compressed gas pressure relief piston 3 is reset after injection is finished, residual trace gas in the rodless cavity 4 can be directly discharged through the exhaust hole 6-1, the pressure in the rodless cavity 4 after reset is always consistent with the atmospheric pressure, and the air core 7 can be pushed to the exhaust hole 6-1 by high-speed air flow during injection to seal the exhaust hole 6-1, so that the piston 3 is driven by the high-speed air flow to finish starting and firing, the piston 3 can have relatively stable starting and firing pressure, and after the compressed gas pressure relief is finished after injection, the air core 7 is reset under the magnetic force adsorption of the magnetic force adsorption piece 8; and the required sealing points are reduced, even if a point of air leakage exists between the contact surface of the sealing gasket 13 and the air tap 5, the air is discharged from the air outlet 6-1, and the normal firing of the piston 3 is not influenced, so that the sealing difficulty between the piston 3 and the end socket assembly is greatly reduced, and meanwhile, the failure rate is also reduced.
Example 2
As shown in fig. 3, embodiment 2 differs from embodiment 1 in that: the preset resistance overcome when the air core 7 moves is elastic, and the specific structure is as follows: the sliding hole 6-2 is provided with a vent spring 10, and the vent spring 10 is used for pushing the air core 7 to the inner end of the sliding hole 6-2; after the injection is finished and the compressed gas is released, the gas core 7 is reset under the elastic force of the exhaust spring 10; in this embodiment, the sealing member 9 may be a sealing gasket, and in order to improve the structural compactness, the inner end of the air core 7 has a step surface, one section of the air exhaust spring 10 abuts against the step surface of the air core 7, the other end abuts against the sealing member 9, and the air core 7 abuts against the side wing 5-2 of the air tap 5 under the pushing of the air exhaust spring 10.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. The utility model provides a start stable dosing device, includes barrel (1) that has piston chamber (2), piston (3), hold-down mechanism and head subassembly, and piston (3) slip sets up in piston chamber (2), its characterized in that: a rodless cavity (4) is formed between the seal head assembly and the piston (3), the seal head assembly is provided with an air flow channel (5-1), an air core (7) and an exhaust hole (6-1) for communicating the outside with the rodless cavity (4), the piston (3) is propped against the seal head assembly under the action of a compressing mechanism, so that an outlet of the air flow channel (5-1) is blocked, when the air in the air flow channel (5-1) is stored until the pressure overcomes the acting force of the compressing mechanism on the piston (3), the piston (3) is formed, the air flow channel (5-1) is triggered, the air core (7) is communicated with the rodless cavity (4), and the air core (7) is arranged to move towards the exhaust hole (6-1) after overcoming the preset resistance of the air core (7) under the compression air pressure in the rodless cavity (4) and is blocked; when the pressure of the gas in the rodless cavity (4) to the gas core (7) is smaller than the preset resistance, the gas core (7) is far away from the exhaust hole (6-1), and the exhaust hole (6-1) is opened.
2. The priming stable drug delivery device of claim 1, wherein: the seal head assembly comprises a seal head (6), the seal head (6) is fixed at the upper end of the cylinder body (1), a rodless cavity (4) is formed between the seal head (6) and the piston (3), a sliding hole (6-2) is formed in the seal head (6), a gas core (7) is inserted into the sliding hole (6-2), a gap (6-3) is reserved between the gas core (7) and the sliding hole (6-2), the rodless cavity (4) is communicated with an exhaust hole (6-1) through the gap (6-3), the exhaust hole (6-1) is located at the outer end of the sliding hole (6-2), and the rodless cavity (4) is located at the inner end of the sliding hole (6-2).
3. The priming stable drug delivery device of claim 2, wherein: the inner end of the sliding hole (6-2) is fixed with a magnetic force absorbing part (8) for absorbing the air core (7) to the inner end of the sliding hole (6-2).
4. The priming stable drug delivery device of claim 2, wherein: the sliding hole (6-2) is provided with a vent spring (10), and the vent spring (10) is used for pushing the air core (7) to the inner end of the sliding hole (6-2).
5. The priming stable drug delivery device of claim 2, wherein: the outer end of the sliding hole (6-2) is provided with a sealing piece (9).
6. The priming stable drug delivery device of claim 3, wherein: the inner end of the air core (7) is provided with a conical part (7-1), the small end of the conical part (7-1) is close to the rodless cavity (4), and the large end of the conical part (7-1) is close to the exhaust hole (6-1); or the inner end of the air core (7) is provided with a thin section, and the outer diameter of the outer end of the air core (7) is larger than the outer diameter of the thin section; or the inner end of the air core (7) is provided with a magnetism isolating gasket.
7. The priming stable drug delivery device of claim 3, wherein: the magnetic head is characterized in that the head (6) is in threaded connection with an air tap (5), the air tap (5) is internally provided with an air flow channel (5-1), the air tap (5) is provided with a side wing (5-2), and the magnetic force absorbing part (8) is clamped and fixed between the side wing (5-2) and the head (6).
8. The priming stable dosing device of claim 7, wherein: the thread connection part between the air tap (5) and the seal head (6) is provided with sealant or wound with a raw material belt.
9. The priming stable dosing device of claim 7, wherein: the sections of the air core (7) and the sliding hole (6-2) are circular, the axis of the sliding hole (6-2) is parallel to the axis of the rodless cavity (4), and the difference between the inner diameter of the sliding hole (6-2) and the outer diameter of the air core (7) is 0.02mm-0.3mm.
10. The priming stable drug delivery device of claim 1, wherein: the compressing mechanism comprises an elastic element (11), the elastic element (11) is arranged in the piston cavity (2), and the piston (3) is pushed by the elasticity of the elastic element (11) to prop against the seal head assembly; or the compressing mechanism comprises a magnetic element, the magnetic element is arranged in the seal head assembly, and the piston (3) is propped against the seal head assembly under the magnetic attraction of the magnetic element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010441305.1A CN111529830B (en) | 2020-05-22 | 2020-05-22 | Stable drug delivery device starts |
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| CN202010441305.1A CN111529830B (en) | 2020-05-22 | 2020-05-22 | Stable drug delivery device starts |
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| CN111529830B true CN111529830B (en) | 2024-10-15 |
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| CN213220055U (en) * | 2020-05-22 | 2021-05-18 | 泰州起点医疗科技有限公司 | Drug delivery device stable in starting |
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| US5383851A (en) * | 1992-07-24 | 1995-01-24 | Bioject Inc. | Needleless hypodermic injection device |
| US6689101B2 (en) * | 2000-05-22 | 2004-02-10 | Pharmacia Ab | Medical arrangement |
| US6613010B2 (en) * | 2001-04-13 | 2003-09-02 | Penjet Corporation | Modular gas-pressured needle-less injector |
| US20070185437A1 (en) * | 2006-02-03 | 2007-08-09 | Boris Goldenberg | Needle-free syringe and the injection procedure |
| US20100313888A1 (en) * | 2009-06-16 | 2010-12-16 | Inspired Technologies, Inc. | Spool valve assembly for delivery of a gaseous drug |
| KR101607922B1 (en) * | 2014-03-11 | 2016-04-20 | 주식회사 홈앤즈 솔루션 | The low-powered cooking containers |
| CN106267464A (en) * | 2015-05-25 | 2017-01-04 | 美敦力公司 | Hydraulic, fluid infusion device and manufacture method thereof |
| DK3368103T3 (en) * | 2015-10-30 | 2020-09-28 | Pajunk GmbH Medizintechnologie | Apparatus for limiting the injection pressure of a medical instrument for injecting the fluid |
| JP7153730B2 (en) * | 2017-12-29 | 2022-10-14 | 佛山市▲順▼▲徳▼区美的▲電▼▲熱▼▲電▼器制造有限公司 | Pressure relief device for cookware and cookware |
| CN110292684B (en) * | 2019-08-09 | 2024-07-05 | 江苏丞宇米特医疗科技有限公司 | Double-pressure needleless injector capable of filling medicine once and injecting multiple times |
| CN110841150B (en) * | 2019-11-20 | 2024-11-08 | 江阴市机电技术有限公司 | A drug delivery device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213220055U (en) * | 2020-05-22 | 2021-05-18 | 泰州起点医疗科技有限公司 | Drug delivery device stable in starting |
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