CN110812229A - Dispensing needle with air filtering function - Google Patents
Dispensing needle with air filtering function Download PDFInfo
- Publication number
- CN110812229A CN110812229A CN201911253906.3A CN201911253906A CN110812229A CN 110812229 A CN110812229 A CN 110812229A CN 201911253906 A CN201911253906 A CN 201911253906A CN 110812229 A CN110812229 A CN 110812229A
- Authority
- CN
- China
- Prior art keywords
- dispensing needle
- air
- channel
- air inlet
- gas inlet
- 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.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2096—Combination of a vial and a syringe for transferring or mixing their contents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2079—Filtering means
- A61J1/2082—Filtering means for gas filtration
Landscapes
- Health & Medical Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
The invention belongs to the technical field of medical instruments, and particularly relates to a dispensing needle with an air filtering function. It is characterized by comprising a dispensing needle which is provided with a liquid channel and a gas channel; the gas channel is provided with a gas inlet, and an air filtering membrane and a gas inlet plug capable of opening and closing the gas inlet are arranged in the gas inlet. In the liquid medicine preparation process, the functions of sucking liquid medicine, automatically filtering compensating gas and facilitating medicine preparation can be realized, the risk that dust and bacterial colonies in the air enter the liquid medicine to be polluted when the liquid medicine is sucked is reduced, and the risk that a hand is easily injured due to improper use of a metal threading needle is avoided.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a dispensing needle with an air filtering function.
Background
In the prior art, the clinically prepared liquid medicine generally adopts a metal puncture needle, which is very easy to hurt the hands of operators and brings risks to medical workers; in addition, the medicine preparation can be completed smoothly only by supplementing air in the process of preparing the liquid medicine, and particles and bacterial colonies in the air can enter liquid, so that the liquid medicine is polluted, and the life safety of a human body is threatened.
Chinese patent publication No. CN207520414U, publication No. 2018, 6 months and 22 days discloses a novel mixed medicament dispensing needle, which comprises a dispensing cavity, pistons with handles symmetrically arranged in the dispensing cavity, a connecting pipe arranged at one end of the dispensing needle, and a connecting needle connected to the other end of the connecting pipe, wherein the device is simple in operation and convenient in use. The defect is that the medicament is not isolated from the air, the puncture is convenient, but the hand is easy to be pricked. To this end, we propose a dispensing needle with air filtration.
Disclosure of Invention
The invention aims to solve the technical problem of providing a special plastic dispensing needle with an air filtering function for dispensing in order to overcome the defects in the prior art.
In order to solve the technical problem, the invention provides a dispensing needle with an air filtering function, which comprises a dispensing needle, wherein the dispensing needle is provided with a liquid channel and an air channel; the liquid medicine is separated from air, so that liquid medicine pollution is avoided, the gas channel is provided with an air inlet, an air filtering membrane and an air inlet plug capable of opening and closing the air inlet are arranged in the air inlet, and micro particles in the air can be isolated.
Preferably, the gas passage includes a main gas inlet passage parallel to the axial direction of the dispensing needle and a gas inlet plug passage vertically communicated with the main gas inlet passage, and the liquid medicine is smoothly sucked by using the principle of air pressure, the gas inlet is provided at the outer side of the gas inlet plug passage away from the main gas inlet passage, the gas inlet plug is provided at the gas inlet in a matching manner so as to be convenient for opening or closing the gas inlet plug, the air filtering membrane is provided at the inner side of the gas inlet plug, and the gas inlet plug can reinforce and compress the air filtering membrane.
Preferably, the air inlet plug passage comprises a buffer section communicated with the main air inlet passage and a connecting section for fixing the air filtering membrane and the air inlet plug, the diameter of the connecting section is larger than that of the buffer section, and the diameter of the buffer section is larger than that of the main air inlet passage; and a step surface is arranged between the connecting section and the buffer section, the edge of the air filtering membrane is fixed on the step surface, the air inlet plug is fixed in the buffer section in a matching way, the contact area of the air filtering membrane is increased, the air flow rate is increased, and microparticles in the air are filtered.
Preferably, the air inlet plug base, the air inlet plug cover and the flexible connecting part are integrally formed by injection molding, and recyclable materials are adopted, so that pollution is avoided.
Preferably, the air filtration membrane is a melt extrusion-stretched polymer resin air filtration membrane without fiber shedding, specifically a PTFE microporous membrane, which has a small membrane pore size, a stable microporous framework, a high PF value, and good filtration performance.
Preferably, the liquid channel penetrates through the dispensing needle along an axial direction parallel to the dispensing needle, the liquid channel is provided with a liquid inlet, and a clamping section matched with a syringe needle is arranged in the liquid inlet, so that the syringe and the dispensing needle can be better matched.
Preferably, the inner diameter of the clamping section is larger than that of the liquid channel, and the inner diameter of the clamping section is gradually reduced from outside to inside, so that when the clamping section is matched with a syringe for use, the suction force of the syringe is improved.
Preferably, the dispensing needle further comprises a protective sleeve, the protective sleeve is provided with a containing cavity matched with the dispensing needle, when the dispensing needle is contained in the containing cavity of the protective sleeve, the air inlet is exposed outside the protective sleeve, and operators are prevented from being pricked during use.
Preferably, the inner wall of the accommodating cavity of the protective sleeve is provided with a radially protruding limiting snap ring, the outer peripheral surface of the dispensing needle is provided with a stop matched with the limiting snap ring, and the dispensing needle is better accommodated in the protective sleeve.
The working principle of the invention is as follows: the dispensing needle is matched with an injector for use, the dispensing needle is pulled out of the protective sleeve and is inserted into the medicine bottle, meanwhile, the air inlet plug cover is pulled out of the air inlet plug opening, the injector is inserted into the liquid inlet of the dispensing needle, and when liquid medicine is extracted, the liquid medicine enters the injector jacket along the liquid channel through the movement of the piston of the injector; meanwhile, external air is filtered by the air filtering membrane and then enters the bottle body along the air channel, so that free suction is ensured; when the sucked liquid medicine is injected into a container to be prepared, the liquid medicine enters along the liquid channel, and simultaneously air in the container is discharged along the gas channel, so that the smooth medicine adding is protected.
Due to the application of the technical scheme, compared with the prior art, the dispensing needle with the air filtering function provided by the invention can realize the functions of sucking liquid medicine, automatically filtering compensation gas and conveniently dispensing liquid medicine, reduces the risk that dust and bacterial colonies in the air enter the liquid medicine to be polluted when the liquid medicine is sucked, and avoids the risk that hands are easily injured due to improper use of a metal threading needle.
Drawings
FIG. 1 is a schematic diagram of an initial state of an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a usage state of an embodiment of the present invention;
FIG. 3 is a block diagram of an air inlet plug according to one embodiment of the present invention;
FIG. 4 is an enlarged view of FIG. 1 taken at A.
In the drawings: 1-a liquid channel; 2-a gas channel; 3-an air filtration membrane; 4-an air inlet plug; 5-protecting the sleeve; 6-dispensing needle; 7-inlet plug channel.
Detailed Description
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Embodiments of the present invention are further described below with reference to the accompanying drawings.
The invention relates to a dispensing needle with an air filtering function, which comprises a dispensing needle 6, wherein the dispensing needle is provided with a liquid channel 1 and an air channel 2; the gas channel 2 has an inlet in which an air filter membrane 3 and an inlet plug 4 for opening and closing the inlet are provided.
As shown in fig. 1 and 2, the gas passage 2 includes a main gas inlet passage parallel to the axial direction of the dispensing needle 6 and a gas inlet plug passage vertically communicated with the main gas inlet passage, and the liquid medicine is smoothly sucked by using the air pressure principle, the gas inlet is arranged at the outer side of the gas inlet plug passage far away from the main gas inlet passage, the gas inlet plug 4 is arranged on the gas inlet in a matching way, so that the gas inlet plug 4 is conveniently opened or closed, the air filtering membrane 3 is arranged at the inner side of the gas inlet plug 4, and the gas inlet plug 4 can reinforce and compress the air filtering membrane 3. The air inlet plug channel 7 comprises a buffer section communicated with the main air inlet channel, and a connecting section for fixing the air filtering membrane 3 and the air inlet plug 4, wherein the diameter of the connecting section is larger than that of the buffer section, and the diameter of the buffer section is larger than that of the main air inlet channel; and a step surface is arranged between the connecting section and the buffering section, the edge of the air filtering membrane 3 is fixed on the step surface, the air inlet plug 4 is matched and fixed in the buffering section, the contact area of the air filtering membrane 3 is increased, the air flow rate is increased, microparticles in the air are filtered, the liquid channel 1 penetrates through the dispensing needle 6 along the axial direction parallel to the dispensing needle 6, the liquid channel 1 is provided with a liquid inlet, a clamping section matched with the needle head of the syringe is arranged in the liquid inlet, the syringe is convenient to be better matched with the dispensing needle, the inner diameter of the clamping section is larger than that of the liquid channel 1, the inner diameter of the clamping section is gradually reduced from outside to inside, when the clamping section is matched with the syringe for use, the suction force of the syringe is improved, the dispensing needle 6 further comprises a protective sleeve 5, the protective sleeve 5 is provided with an accommodating cavity matched with the dispensing needle 6, when the dispensing needle 6 is accommodated, avoid pricking operating personnel when using, be equipped with radial bellied spacing snap ring on the intracavity wall of acceping of protective sheath 5, the outer peripheral face of dispensing needle 6 has and keeps off with spacing snap ring matched with, and dispensing needle 6 is better holds in protective sheath 5.
As shown in fig. 3 and 4, the air filtering membrane 3 is a high molecular resin air filtering membrane that is extruded and stretched by melting and has no fiber to fall off, specifically, a PTFE microporous membrane, the membrane aperture is smaller, the microporous framework is stable, the PF value is higher, the filtering performance is good, the air inlet plug 4 comprises an air inlet plug base, an air inlet plug cover and a flexible connecting part for connecting the air inlet plug base and the air inlet plug cover, the air inlet plug base is made of recyclable materials, the pollution is avoided, an air inlet through hole is formed in the air inlet plug base, a plug part matched with the through hole in a sealing manner is arranged on the air inlet plug cover, the air inlet plug base, the air inlet plug cover and the flexible connecting part are integrally injection molded, and the air inlet plug.
The working principle of the invention is as follows: the dispensing needle 6 is matched with an injector for use, the dispensing needle 6 is pulled out from the protective sleeve 5, the dispensing needle 6 is inserted into a medicine bottle, meanwhile, the injector is clamped into a matched clamping section in the liquid inlet, the air inlet plug cover of the air inlet plug 4 is pulled out from the air inlet plug opening, the injector is inserted into the liquid inlet of the dispensing needle 6, and when liquid medicine is extracted, the liquid medicine enters the injector outer sleeve along the liquid channel 1 through the movement of the piston of the injector; meanwhile, external air enters the bottle body along the air channel after being filtered by the air filtering membrane 3, so that free suction is ensured; when the syringe injects the pumped liquid medicine into a container to be prepared, the piston of the syringe is pushed to move, the liquid medicine in the syringe enters the container along the liquid channel 1 of the dispensing needle 6, meanwhile, air in the bottom of the container is discharged along the gas channel 2 of the dispensing needle, the medicine feeding is protected to be smooth, after the dispensing needle is used, the air inlet plug pressure head of the dispensing needle is pulled out from the air inlet plug port, the residual liquid medicine is poured out, and pollution is avoided during recycling.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a take air filter function's dispensing needle which characterized in that: comprises a dispensing needle (6) which is provided with a liquid channel (1) and a gas channel (2); the gas channel (2) is provided with a gas inlet, and an air filtering membrane (3) and a gas inlet plug (4) capable of opening and closing the gas inlet are arranged in the gas inlet.
2. The dispensing needle with an air filtering function according to claim 1, characterized in that: the gas channel (2) comprises a main gas inlet channel which is parallel to the axial direction of the dispensing needle (6) and a gas inlet plug channel (7) which is vertically communicated with the main gas inlet channel, the gas inlet is formed in the outer side, far away from the main gas inlet channel, of the gas inlet plug channel (7), the gas inlet plug (4) is arranged on the gas inlet in a matched mode, and the air filtering membrane (3) is arranged on the inner side of the gas inlet plug (4).
3. The dispensing needle with an air filtering function according to claim 2, characterized in that: the air inlet plug channel (7) comprises a buffer section communicated with the main air inlet channel and a connecting section for fixing the air filtering membrane (3) and the air inlet plug (4), the diameter of the connecting section is larger than that of the buffer section, and the diameter of the buffer section is larger than that of the main air inlet channel; and a step surface is arranged between the connecting section and the buffering section, the edge of the air filtering membrane (3) is fixed on the step surface, and the air inlet plug (4) is fixed in the buffering section in a matching manner.
4. The dispensing needle with an air filtering function according to claim 2, characterized in that: the air inlet plug (4) comprises an air inlet plug base, an air inlet plug cover and a flexible connecting portion, the flexible connecting portion is connected with the air inlet plug base and the air inlet plug cover, an air inlet through hole is formed in the air inlet plug base, and a plug portion in sealing fit with the through hole is arranged on the air inlet plug cover.
5. The dispensing needle with an air filtering function according to claim 4, characterized in that: the air inlet plug base, the air inlet plug cover and the flexible connecting portion are integrally formed in an injection molding mode.
6. The dispensing needle with an air filtering function according to claim 1, characterized in that: the air filtering membrane (3) is a high polymer resin air filtering membrane which is extruded and stretched by melting and has no fiber shedding.
7. The dispensing needle with an air filtering function according to claim 1, characterized in that: liquid channel (1) is along the parallel the axial of dispensing needle (6) is run through dispensing needle (6), liquid channel (1) has the inlet, have in the inlet with syringe needle assorted joint section.
8. The dispensing needle with an air filtering function according to claim 7, characterized in that: the inner diameter of the clamping section is larger than that of the liquid channel (1), and the inner diameter of the clamping section is gradually reduced from outside to inside.
9. The dispensing needle with air filtration function according to any one of claims 1 to 8, characterized in that: the dispensing needle further comprises a protective sleeve (5), the protective sleeve (5) is provided with a containing cavity matched with the dispensing needle (6), and when the dispensing needle (6) is contained in the containing cavity of the protective sleeve (5), the air inlet is exposed out of the protective sleeve (5).
10. The dispensing needle with an air filtering function according to claim 9, characterized in that: the inner wall of the accommodating cavity of the protective sleeve (5) is provided with a radial raised limiting snap ring, and the outer peripheral surface of the dispensing needle (6) is provided with a stop matched with the limiting snap ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911253906.3A CN110812229A (en) | 2019-12-09 | 2019-12-09 | Dispensing needle with air filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911253906.3A CN110812229A (en) | 2019-12-09 | 2019-12-09 | Dispensing needle with air filtering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110812229A true CN110812229A (en) | 2020-02-21 |
Family
ID=69544237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911253906.3A Pending CN110812229A (en) | 2019-12-09 | 2019-12-09 | Dispensing needle with air filtering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110812229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210381A (en) * | 2021-04-14 | 2021-08-06 | 东软威特曼生物科技（沈阳）有限公司 | A wash subassembly and biochemical analysis appearance for rinsing cell among biochemical analysis appearance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938520A (en) * | 1974-06-10 | 1976-02-17 | Abbott Laboratories | Transfer unit having a dual channel transfer member |
| CN103156773A (en) * | 2011-12-13 | 2013-06-19 | 湖南平安医械科技有限公司 | Dosing needle capable of exhausting air automatically |
| CN203694254U (en) * | 2014-02-09 | 2014-07-09 | 圣光医用制品有限公司 | Bottle stopper puncture device |
| CN204033945U (en) * | 2014-08-14 | 2014-12-24 | 山东颐兴医疗器械有限公司 | Novel air-prevention filter membrane fibre shedding transfusion device |
| WO2015125987A1 (en) * | 2014-02-21 | 2015-08-27 | 엘케이메디칼(주) | Syringe integrated with filter needle, blood backflow prevention device and venous catheter having blood backflow prevention device |
| CN209695836U (en) * | 2019-01-23 | 2019-11-29 | 中国人民解放军总医院 | A kind of dispensation apparatus convenient for extracting medical fluid |
-
2019
- 2019-12-09 CN CN201911253906.3A patent/CN110812229A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938520A (en) * | 1974-06-10 | 1976-02-17 | Abbott Laboratories | Transfer unit having a dual channel transfer member |
| CN103156773A (en) * | 2011-12-13 | 2013-06-19 | 湖南平安医械科技有限公司 | Dosing needle capable of exhausting air automatically |
| CN203694254U (en) * | 2014-02-09 | 2014-07-09 | 圣光医用制品有限公司 | Bottle stopper puncture device |
| WO2015125987A1 (en) * | 2014-02-21 | 2015-08-27 | 엘케이메디칼(주) | Syringe integrated with filter needle, blood backflow prevention device and venous catheter having blood backflow prevention device |
| CN204033945U (en) * | 2014-08-14 | 2014-12-24 | 山东颐兴医疗器械有限公司 | Novel air-prevention filter membrane fibre shedding transfusion device |
| CN209695836U (en) * | 2019-01-23 | 2019-11-29 | 中国人民解放军总医院 | A kind of dispensation apparatus convenient for extracting medical fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210381A (en) * | 2021-04-14 | 2021-08-06 | 东软威特曼生物科技（沈阳）有限公司 | A wash subassembly and biochemical analysis appearance for rinsing cell among biochemical analysis appearance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101335979B1 (en) | Filter hub assembly for aspirating and injecting liquid medicine | |
| DK162480B (en) | hypodermic syringe | |
| KR101680211B1 (en) | Filter assembly for syringe interior and safety syringe using the same | |
| CN106176220A (en) | A kind of sterile dispensing system | |
| CN110812605A (en) | Precise filtering injector | |
| CN110812229A (en) | Dispensing needle with air filtering function | |
| US5346474A (en) | Disposable safety syringe | |
| CN106178155B (en) | The infusion container interface and infusion vessel repeatedly directly matched can be carried out to multi-form | |
| KR101551400B1 (en) | Syringe having dual micro filters | |
| CN204297316U (en) | Pharmaceutical reagent bottle cap | |
| CN208958787U (en) | Configuration needle and configuration device with air pressure balance function | |
| JP2003325663A (en) | Cartridge injector | |
| CN208943100U (en) | A kind of piercing assembly and remaining needle | |
| CN215653122U (en) | Disposable injector for dissolving medicine | |
| CN220213153U (en) | Powder feeding injector for nursing pet joints | |
| CN215915990U (en) | High viscosity liquid medicine needle tube type filter | |
| CN214969083U (en) | Medical infusion bag convenient for adding medicine | |
| CN218774599U (en) | Medical treatment is with disposable liquid medicine transfer filter | |
| CN215385947U (en) | Multifunctional plastic physiological saline bottle | |
| CN214972311U (en) | Sterile filtering device for particle impurities of injection liquid medicine | |
| CN2309841Y (en) | Aseptic oxygen therapy device | |
| CN215460951U (en) | Fluid infusion puncture device | |
| CN214435701U (en) | Safety syringe | |
| CN216934303U (en) | Stable protection end cap of syringe | |
| CN215133417U (en) | Safe type liquid distribution infusion bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200221 |
|
| WD01 | Invention patent application deemed withdrawn after publication |