CN211536007U - One-way filtering syringe - Google Patents
One-way filtering syringe Download PDFInfo
- Publication number
- CN211536007U CN211536007U CN201822111344.6U CN201822111344U CN211536007U CN 211536007 U CN211536007 U CN 211536007U CN 201822111344 U CN201822111344 U CN 201822111344U CN 211536007 U CN211536007 U CN 211536007U
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- needle
- seat
- cavity
- valve body
- syringe
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- 238000001914 filtration Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 239000012528 membrane Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 241000405070 Percophidae Species 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 19
- 239000007924 injection Substances 0.000 abstract description 19
- 230000008859 change Effects 0.000 abstract description 4
- 241000894006 Bacteria Species 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000003612 virological effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 26
- 238000000605 extraction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 241001411320 Eriogonum inflatum Species 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000001297 phlebitis Diseases 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides a one-way filtration syringe, including syringe, lower needle file, last needle file and needle tubing, be equipped with the cavity in needle file and the last needle file down, be equipped with filtration membrane and check valve between lower needle file and the last needle file in proper order, the check valve includes the valve body, valve body one end internal diameter cover is on cylinder type liquid passage surface, and the valve body other end is duckbilled structure, the valve body surface is equipped with the span of annular umbelliform structure, span and the laminating of last needle file internal surface. The beneficial effects of the utility model are that have overall structure simple, convenient operation, safe and reliable, with low costs, inlet channel and liquid outlet channel mutual noninterference, the reliability reinforcing filters when the injection, filters completely and need not change the syringe needle, has avoided bacterium and viral contamination's possibility, need not filter during the injection, can not increase the injection resistance, and its injection time is the same with ordinary syringe.
Description
Technical Field
The utility model relates to a novel syringe, in particular to a filtering syringe.
Background
As is known, most of the currently used injections are packaged in glass bottles, and when a rubber plug is pricked by a needle of a syringe or a glass bottle is cut by a grinding wheel to extract liquid medicine, bottle stopper scraps or glass powder can enter the injection. The conventional syringe does not have a filtering function, and when liquid medicine is extracted, the impurities are extracted into the syringe and directly injected into a patient, so that diseases such as phlebitis and the like are induced.
The Chinese patent application CN103721321A discloses an automatic filtering injector, which comprises an injector and a filtering injection needle, wherein the injection needle consists of a needle tube and a needle seat, the needle tube is arranged at the front end of an upper needle seat, the rear end of a lower needle seat is connected to a conical head of the injector, the front end of the lower needle seat is combined with the upper needle seat to form a liquid suction inlet and an injection outlet, a check valve is arranged on the lower needle seat, the check valve is opened in the liquid suction direction of the liquid suction inlet and the injection direction of the injection outlet, a filter is arranged on the liquid suction inlet, the middle part of the upper end of the lower needle seat extends upwards to form a cylindrical liquid channel, the liquid channel is an injection outlet, the periphery of the injection outlet is a liquid inlet, the check valve is of an umbrella-shaped structure, the center of the check valve is provided with a fixed sleeve sleeved outside the cylindrical liquid channel, a gap cavity is formed between, the rim extends downwardly to form a flap structure.
Due to the structural design of the check valve of the filtering syringe, when liquid is extracted into the syringe, the channel in the middle of the check valve is also opened due to the extrusion of negative pressure, and liquid medicine can enter the syringe from the middle channel of the check valve without being filtered, so that the risk of incomplete filtering exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure utilizes the syringe internal pressure to change, and the automatic regulating case state realizes the filtering capability of liquid medicine and need not to filter the syringe from a new change syringe needle when injecting.
The technical scheme of the utility model is that: a one-way filtering injector comprises an injector, a lower needle seat, an upper needle seat and a needle tube, wherein the needle tube is arranged at the front end of the upper needle seat, the rear end of the lower needle seat is connected with a conical head of the injector, the middle part of the upper end in the lower needle seat extends upwards to form a cylindrical liquid channel, the liquid channel is an injection liquid outlet, liquid inlet openings are formed around the liquid channel, the cylindrical liquid channel divides the lower needle seat into an inner cavity of the liquid channel and an outer cavity outside the liquid channel, a cavity is arranged in the upper needle seat, a filtering membrane and a one-way valve are sequentially arranged between the lower needle seat and the upper needle seat, the lower needle seat, the filtering membrane, the one-way valve and the upper needle seat are combined to form two different liquid extracting and injecting channels, when liquid medicine is extracted, the liquid medicine flows through the upper needle seat cavity, the outer side surface of the one-way valve, The check valve comprises a valve body, the inner diameter of one end of the valve body is matched with a cylindrical liquid channel of the lower needle seat and sleeved on the outer surface of the cylindrical liquid channel, the other end of the valve body is of a closed duckbill structure, the outer surface of the valve body is provided with a wingspan of an annular umbrella-shaped structure, and the upper edge part of the wingspan umbrella-shaped structure of the check valve can be tightly attached to the inner surface of the inner cavity of the upper needle seat.
When liquid medicine is extracted, the liquid medicine enters through the needle tube, the duckbill port of the one-way valve is tightly closed under the action of negative pressure, the edge wingspan of the one-way valve can be retracted inwards under the thrust of the liquid medicine, so that a gap is generated between the wingspan and the inner surface of the inner cavity of the upper needle seat, a liquid channel is formed, the liquid medicine can pass through the edge of the one-way valve, enter the lower cavity of the filter needle through the filter membrane and then enter the injector through the lower needle seat, and the liquid extraction process is completed;
when the liquid medicine is injected, the liquid medicine is discharged from the injector and enters the cylindrical liquid channel through the lower needle seat, due to the thrust of the liquid medicine, the wingspan of the one-way valve can be tightly attached to the inner surface of the inner cavity of the upper needle seat, the liquid medicine flows into the one-way valve and can be used for flushing the duckbill channel at the upper end of the one-way valve, and the liquid medicine is injected into a human body through the upper needle seat and the needle tube.
The cavity of the upper needle base comprises an upper cavity close to the needle tube and a lower cavity far away from the needle tube, the inner surface of the lower cavity is matched with the outer surface of the lower needle base, and the inner cross section of the upper cavity is a frustum.
The upper needle seat comprises an upper needle seat outer barrel, an upper needle seat frustum and a steel needle fixing seat, a large circle of the upper needle seat frustum is connected with one end of the upper needle seat outer barrel, a small circle of the upper needle seat frustum is connected with the cylindrical steel needle fixing seat, a needle tube is arranged on the steel needle fixing seat, positioning ribs are evenly distributed on the outer side walls of the steel needle fixing seat and the upper needle seat frustum in the circumferential direction, and the positioning ribs can be three, four or six.
In the upper cavity, the upper edge surface of the wingspan of the one-way valve can be tightly attached to the inner surface of the upper cavity of the upper needle base, and one end of the duckbill-shaped structure of the valve body is not attached to the inner surface of the upper cavity.
The diameter ratio of the maximum outer diameter of the wingspan in the horizontal direction perpendicular to the valve body to the bottom surface of the upper cavity in the same plane is 1.05-1.3: 1.
The middle position of the top of the wingspan is provided with an annular horizontal end face with an opening, the opening of the annular end face is matched with the valve body, and the outer edge of the annular end face is provided with a lip body of an umbrella-shaped structure formed by downward arc extension.
Preferably, the check valve is made of a silica gel material with good elasticity.
The lower end of the cylindrical liquid channel is connected with the lower needle seat through a connecting seat, an annular middle boss is arranged between the connecting seat and the cylindrical liquid channel, an annular edge boss is arranged between the connecting seat and the inner surface of the lower needle seat, and the end faces of the middle boss and the edge boss are in the same plane.
The middle of the filtering membrane is provided with a through hole matched with the outer surface of the cylindrical liquid channel, and the lower surface of the filtering membrane is arranged on the end faces of the middle boss and the edge boss.
The utility model has the advantages and positive effects that: the utility model discloses an one-way filtration syringe has overall structure simple, convenient operation, safe and reliable, with low costs, inlet channel and liquid outlet channel mutual noninterference, and the reliability reinforcing filters when the injection, filters completely and need not change the syringe needle, has avoided bacterium and viral contamination's possibility, need not filter during the injection, can not increase the injection resistance, and its injection time is the same with ordinary syringe.
Drawings
FIG. 1 is an exploded view of the filter type syringe of the present invention
FIG. 2 is a schematic view of the assembly of the filter type syringe of the present invention
FIG. 3 is a schematic view showing the flow direction of the liquid in the needle holder during the liquid medicine extraction of the present invention
FIG. 4 is a schematic view showing the flow direction of the liquid in the needle holder during the injection of the liquid medicine of the present invention
FIG. 5 is a schematic view of the lower needle holder of the present invention
FIG. 6 is a schematic view of the filtering membrane of the present invention
FIG. 7 is a schematic view of the check valve of the present invention
FIG. 8 is a schematic view of the upper needle seat of the present invention
In the figure:
1. syringe 2, lower needle holder 3, filter membrane
4. One-way valve 5, upper needle seat 6 and needle tube
7. Positioning rib 41, valve body 42 and wingspan
51. Upper cavity 52, lower cavity 53, outer cylinder
54. Upper needle seat frustum 55, steel needle fixing seat 421 and annular end face
422. Lip body
Detailed Description
As shown in figures 1-6, the utility model relates to a one-way filtering injector, which comprises an injector 1, a lower needle base 2, an upper needle base 5 and a needle tube 6, wherein the needle tube 6 is arranged at the front end of the upper needle base 5, the rear end of the lower needle base 2 is connected with the conical head of the injector 1, the middle part of the upper end in the lower needle base 2 extends upwards to form a cylindrical liquid channel, cavities are arranged in the lower needle seat 2 and the upper needle seat 5, a filtering membrane 3 and a one-way valve 4 are sequentially arranged between the lower needle seat 2 and the upper needle seat 5, and two different liquid pumping and injecting channels are formed by the combination of the lower needle seat 2, the filtering membrane 3, the one-way valve 4 and the upper needle seat 5, the one-way valve 4 comprises a valve body 41, the inner diameter of one end of the valve body 41 is sleeved on the outer surface of the cylindrical liquid channel, the other end of the valve body 41 is of a duckbill-shaped structure, the outer surface of the valve body 41 is provided with a wingspan 42 with an annular umbrella-shaped structure, and the umbrella-shaped upper edge part of the wingspan 42 of the check valve 4 is tightly attached to the inner surface of the inner cavity of the upper needle base.
When liquid medicine is extracted, the liquid medicine enters through the needle tube 6, the duckbill opening of the one-way valve 4 is tightly closed under the action of negative pressure, the edge wingspan 42 of the one-way valve 4 can be inwardly contracted under the thrust of the liquid medicine, so that a gap is generated between the wingspan 42 and the inner surface of the inner cavity of the upper needle seat 5, a liquid channel is formed, the liquid medicine can pass through the edge of the one-way valve 4, enter the lower cavity 2 of the filter needle through the filter membrane 3 and then enter the injector through the lower needle seat 2, and the liquid extraction process is completed;
when the liquid medicine is injected, the liquid medicine is discharged from the injector 1 and enters the cylindrical liquid channel through the lower needle seat 2, due to the thrust of the liquid medicine, the wingspan 42 of the one-way valve 4 can be tightly attached to the inner surface of the inner cavity of the upper needle seat 5, the liquid medicine flows into the one-way valve 4 and can open the duckbill channel at the upper end of the one-way valve 4, and the liquid medicine is injected into the body through the upper needle seat 5 and the needle tube 6.
As shown in fig. 8, the inner cavity of the upper needle seat 5 comprises an upper cavity 51 close to the needle tube 6 and a lower cavity 52 far away from the needle tube 6, the inner surface of the lower cavity 52 is matched with the outer surface of the lower needle seat 3, and the cross section of the upper cavity 51 is a frustum surface.
The upper needle base 5 comprises an upper needle base outer barrel 53, an upper needle base frustum 54 and a steel needle fixing seat 55, a large circle of the upper needle base frustum 54 is connected with one end of the upper needle base outer barrel 53, a small circle of the upper needle base frustum 54 is connected with the cylindrical steel needle fixing seat 55, the needle tube 6 is arranged on the steel needle fixing seat 55, and 4 positioning ribs 7 are uniformly distributed on the outer side walls of the steel needle fixing seat 55 and the upper needle base frustum in the circumferential direction.
As shown in fig. 7, the top of the span 42 is provided with an annular end surface 421 with an opening, the opening of the annular end surface 421 is matched with the valve body 41, and the outer edge of the annular end surface 421 extends downwards in an arc shape to form a lip 422 with an umbrella structure.
In the upper cavity 51, the upper edge surface of the lip body 422 of the umbrella-shaped structure on the wingspan 42 of the check valve 4 can be tightly attached to the inner surface of the upper cavity 51 of the upper needle base, and one end of the duckbill-shaped structure of the valve body 41 is not attached to the inner surface of the upper cavity 51.
The ratio of the maximum outer diameter of the wingspan 42 perpendicular to the horizontal direction of the valve body 41 to the bottom surface diameter of the upper cavity 51 in the same plane is 1.1: 1.
The one-way valve 4 is made of a silica gel material.
The lower end of the cylindrical liquid channel is connected with the lower needle seat 2 through a connecting seat, an annular middle boss is arranged between the connecting seat and the cylindrical liquid channel, an annular edge boss is arranged between the connecting seat and the inner surface of the lower needle seat 2, and the end faces of the middle boss and the edge boss are in the same plane.
The middle of the filtering membrane 3 is provided with a through hole matched with the outer surface of the cylindrical liquid channel, and the lower surface of the filtering membrane 3 is arranged on the end faces of the middle boss and the edge boss.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (9)
1. A unidirectional filtering injector comprises an injector (1), a lower needle seat (2), an upper needle seat (5) and a needle tube (6), wherein the needle tube (6) is arranged at the front end of the upper needle seat (5), the rear end of the lower needle seat (2) is connected with a conical head of the injector (1), the middle part of the inner upper end of the lower needle seat (2) extends upwards to form a cylindrical liquid channel, it is characterized in that the lower needle seat (2) and the upper needle seat (5) are internally provided with a cavity, a filtering membrane (3) and a one-way valve (4) are sequentially arranged between the lower needle seat (2) and the upper needle seat (5), the check valve (4) comprises a valve body (41), the inner diameter of one end of the valve body (41) is sleeved on the outer surface of the cylindrical liquid channel, the other end of the valve body (41) is of a duckbill structure, the outer surface of the valve body (41) is provided with a wingspan (42) of an annular umbrella-shaped structure, and the wingspan (42) is attached to the inner surface of the upper needle seat.
2. The one-way filtration syringe of claim 1, wherein: go up needle file (5) cavity including last cavity (51) that is close to needle tubing (6) and keep away from lower cavity (52) of needle tubing (6), cavity (52) internal surface and needle file (2) surface cooperate down, the cross section of going up cavity (51) is the frustum.
3. The one-way filtration syringe of claim 1, wherein: go up needle file (5) including last outer barrel of needle file (53), go up needle file frustum (54) and steel needle fixing base (55), the great circle of going up needle file frustum (54) is connected with the one end of last outer barrel of needle file (53), and the small circle of going up needle file frustum (54) is connected with cylindrical steel needle fixing base (55), and needle tubing (6) set up on steel needle fixing base (55), and the circumference equipartition is equipped with location muscle (7) on the lateral wall of steel needle fixing base (55) and last needle file frustum.
4. The one-way filtration syringe of claim 2, wherein: in the upper cavity (51), a wingspan (42) is attached to the inner surface of the upper cavity (51), and one end of the duckbill-shaped structure of the valve body (41) is not attached to the inner surface of the upper cavity (51).
5. The one-way filtration syringe of claim 3, wherein: the diameter ratio of the maximum outer diameter of the wingspan (42) perpendicular to the horizontal direction of the valve body (41) to the bottom surface of the upper cavity (51) is 1.05-1.3: 1.
6. The one-way filtration syringe of either one of claims 1 or 4, wherein: the top of the wingspan (42) is provided with an annular end surface (421) with an opening, the opening of the annular end surface (421) is matched with the valve body (41), and the outer edge of the annular end surface (421) extends downwards in an arc shape to form a lip body with an umbrella-shaped structure.
7. The one-way filtration syringe of claim 1, wherein: the check valve (4) is made of a silica gel material.
8. The one-way filtration syringe of claim 1, wherein: the lower end of the cylindrical liquid channel is connected with the lower needle seat (2) through a connecting seat, an annular middle boss is arranged between the connecting seat and the cylindrical liquid channel, an annular edge boss is arranged between the connecting seat and the inner surface of the lower needle seat (2), and the end faces of the middle boss and the edge boss are in the same plane.
9. The one-way filtration syringe of claim 8, wherein: the middle of the filtering membrane (3) is provided with a through hole matched with the outer surface of the cylindrical liquid channel, and the lower surface of the filtering membrane (3) is arranged on the end faces of the middle boss and the edge boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111344.6U CN211536007U (en) | 2018-12-17 | 2018-12-17 | One-way filtering syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111344.6U CN211536007U (en) | 2018-12-17 | 2018-12-17 | One-way filtering syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211536007U true CN211536007U (en) | 2020-09-22 |
Family
ID=72487293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822111344.6U Active CN211536007U (en) | 2018-12-17 | 2018-12-17 | One-way filtering syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211536007U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464726A (en) * | 2018-12-17 | 2019-03-15 | 山东威高集团医用高分子制品股份有限公司 | Unidirectional filtration syringe |
-
2018
- 2018-12-17 CN CN201822111344.6U patent/CN211536007U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464726A (en) * | 2018-12-17 | 2019-03-15 | 山东威高集团医用高分子制品股份有限公司 | Unidirectional filtration syringe |
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