CN210009460U - Liquid outlet filtering injector - Google Patents
Liquid outlet filtering injector Download PDFInfo
- Publication number
- CN210009460U CN210009460U CN201822114106.0U CN201822114106U CN210009460U CN 210009460 U CN210009460 U CN 210009460U CN 201822114106 U CN201822114106 U CN 201822114106U CN 210009460 U CN210009460 U CN 210009460U
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- China
- Prior art keywords
- connecting piece
- needle
- frustum
- outer barrel
- file
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- 238000001914 filtration Methods 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 239000012528 membrane Substances 0.000 claims abstract description 10
- 238000010079 rubber tapping Methods 0.000 claims 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 11
- 238000007599 discharging Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 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
- 238000005213 imbibition Methods 0.000 description 1
- 238000000034 method Methods 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
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides a liquid outlet filtering injector, which comprises an injector and an injection needle head, wherein a lower needle seat comprises a conical cavity, a lower needle seat frustum and a lower needle seat outer cylinder body, and a plurality of grooves are uniformly distributed on the circumference of the inner side wall of the lower needle seat frustum; the connecting piece comprises a connecting piece outer cylinder, a connecting piece annular surface and a connecting piece inner cylinder, and a plurality of connecting piece through holes are uniformly distributed on the connecting piece annular surface at the circumference; go up the needle file and include the outer barrel of last needle file, go up needle file frustum and steel needle fixing base, the lateral wall of the outer barrel of connecting piece and the inside wall interference fit of the outer barrel of lower needle file and the inside wall of the outer barrel of last needle file, lower check valve is for setting up the elastic ball in the needle file frustum down, and annular filtration membrane setting is at the downside of connecting piece annular face, and the upside of connecting piece annular face is equipped with annular last check valve. The beneficial effects of the utility model are that one-way filtration, the security is high.
Description
Technical Field
The utility model belongs to the field of medical equipment, especially, relate to a play liquid filters 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 filtering syringe with the patent number of CN103721321A is unreasonable in structural design of the check valve, when liquid is extracted into the syringe, a channel in the middle of the check valve is opened due to the extrusion of negative pressure, the liquid medicine can enter the syringe without being filtered from the middle channel of the check valve, the risk of incomplete filtering exists, the original structure is filtering when the liquid medicine is extracted, and the risk of re-injecting the impurities which are filtered before when the liquid medicine is injected exists.
Disclosure of Invention
The utility model aims at providing a play liquid filtration syringe of simple structure, security height.
The technical scheme of the utility model is that:
the liquid outlet filtering injector comprises an injector and an injection needle head, wherein the injection needle head comprises a lower needle seat, a lower one-way valve, a filtering membrane, a connecting piece, an upper one-way valve, an upper needle seat and a steel needle fixed on the upper needle seat; the connecting piece comprises a connecting piece outer cylinder, a connecting piece annular surface and a connecting piece inner cylinder, wherein the excircle of the connecting piece annular surface is vertically connected with the connecting piece outer cylinder, the inner circle of the connecting piece annular surface is vertically connected with the connecting piece inner cylinder, and a plurality of connecting piece through holes are uniformly distributed on the circumference of the connecting piece annular surface; the lower one-way valve is an elastic ball body arranged in the lower needle seat frustum; go up the needle file and include the outer barrel of last needle file, go up needle file frustum and steel needle fixing base, the great circle of going up the needle file frustum is connected with the one end of the outer barrel of last needle file, the small circle of going up the needle file frustum is connected with the steel needle fixing base of cylinder, the steel needle sets up on the steel needle fixing base, the lower extreme of the lateral wall of the outer barrel of connecting piece and the inside wall interference fit of the outer barrel of needle file down, the upper end of the lateral wall of the outer barrel of connecting piece and the inside wall interference fit of the outer barrel of last needle file, the ball footpath of check valve is greater than needle file frustum tip diameter down, annular filtration membrane sets up the downside at the connecting piece annular face, the upside of connecting piece annular face is equipped with annular last check valve.
The utility model discloses when going out liquid filtration syringe feed liquor, go up the clearance between check valve and the connecting piece annular surface and close, clearance between the barrel is opened under lower check valve and the connecting piece, and the liquid medicine passes through under the connecting piece during the barrel enters into needle holder frustum down, then the recess on needle holder frustum inside wall flows into down the needle holder through-hole under, enters into the conical head chamber. When liquid is discharged, the gap between the lower one-way valve and the inner cylinder body of the connecting piece is closed, the gap between the upper one-way valve and the annular surface of the connecting piece is opened, liquid medicine flows into the lower needle seat frustum from the groove, enters the connecting piece through hole in the annular surface of the connecting piece through the filtering membrane, and then flows into the upper needle seat frustum from the gap between the annular surface of the connecting piece and the upper one-way valve.
The length of the groove is equal to that of the inner side wall of the lower needle seat frustum.
The lower end opening of the connecting piece inner cylinder body is in a horn shape matched with the lower one-way valve.
The upper end of the outer side wall of the connecting piece inner cylinder body is provided with an annular groove, and the upper check valve is arranged in the annular groove.
The diameter of the lower end of the through hole of the connecting piece is larger than that of the upper end of the through hole of the connecting piece.
The upper needle base also comprises an annular surface of the upper needle base, the inner circle of the annular surface of the upper needle base is connected with the big circle of the frustum of the upper needle base, and the outer circle of the annular surface of the upper needle base is vertically connected with the outer barrel of the upper needle base.
And positioning ribs are uniformly distributed on the outer side walls of the steel needle fixing seat and the upper needle seat frustum in the circumferential direction.
The utility model has the advantages and positive effects that: by adopting the technical scheme, the liquid inlet of the liquid outlet filtering injector is not filtered, the liquid outlet is filtered in a one-way mode, the filtering pressure is low, the safety is high, and the operation is labor-saving and convenient.
Drawings
FIG. 1 is a schematic structural view of the liquid-discharging filtering injector of the present invention
FIG. 2 is an exploded view of the needle of the liquid-filtering syringe of the present invention
FIG. 3 is a schematic view of the structure of the lower needle seat of the liquid-discharging filtering injector of the present invention
FIG. 4 is a schematic view of the structure of the connection piece of the liquid-discharging filtering syringe of the present invention
FIG. 5 is a schematic view of the liquid inlet state structure of the liquid outlet filtering syringe of the present invention
FIG. 6 is a schematic view of the structure of the liquid-out state of the liquid-out filtering syringe of the present invention
In the figure:
1. the syringe 2, the lower needle seat 3, the lower one-way valve 4 and the filtering membrane
5. Connecting piece 6, upper one-way valve 7, upper needle seat 8 and steel needle
21. Lower needle base outer cylinder 22, conical head cavity 23, lower needle base frustum 24 and groove
25. Lower needle seat through hole 51, connecting piece outer cylinder 52, connecting piece inner cylinder 53 and connecting piece annular surface
54. Connecting piece through hole 71, upper needle seat outer cylinder 72, upper needle seat frustum 73 and positioning rib
74. Steel needle fixing seat 75 and upper needle seat annular surface
Detailed Description
As shown in fig. 1 and 2, the liquid-filtering injector of the present invention comprises an injector 1 and an injection needle, wherein the injection needle comprises a lower needle base 2, a lower check valve 3, a filtering membrane 4, a connecting piece 5, an upper check valve 6, an upper needle base 7 and a steel needle 8 fixed on the upper needle base 7, as shown in fig. 3, the lower needle base 2 comprises a conical head cavity 22, a lower needle base frustum 23 and a lower needle base outer cylinder 21, the conical head cavity 22 is connected with the conical head of the injector 1, the small end of the lower needle base frustum 23 is connected with the conical head cavity 22, the large end of the lower needle base frustum 23 is vertically connected with the lower needle base outer cylinder 21, and a plurality of grooves 24 are uniformly distributed on the circumference of the inner side wall of the lower needle base frustum 23; as shown in fig. 4, the connecting piece 5 comprises a connecting piece outer cylinder 51, a connecting piece annular surface 53 and a connecting piece inner cylinder 52, wherein the outer circle of the connecting piece annular surface 53 is vertically connected with the middle part of the inner side wall of the connecting piece outer cylinder 52, the inner circle of the connecting piece annular surface 53 is vertically connected with the middle part of the outer side wall of the connecting piece inner cylinder 51, and a plurality of connecting piece through holes 54 are uniformly distributed on the upper circumference of the connecting piece annular surface 53; the lower one-way valve 3 is an elastic ball arranged in the lower needle seat frustum 23; go up needle file 7 and include the outer barrel 71 of last needle file, go up needle file frustum 72 and steel needle fixing base 74, the great circle of going up needle file frustum 72 is connected with the one end of the outer barrel 71 of last needle file, the small circle of going up needle file frustum 72 is connected with cylindrical steel needle fixing base 74, steel needle 8 sets up on steel needle fixing base 74, the lower extreme of the lateral wall of the outer barrel 51 of connecting piece and the inside wall interference fit of the outer barrel 21 of lower needle file, the upper end of the lateral wall of the outer barrel 51 of connecting piece and the inside wall interference fit of the outer barrel 71 of last needle file, the ball diameter of lower check valve 3 is greater than the tip diameter of lower needle file frustum 23, annular filtration membrane 4 sets up the downside at connecting piece annular surface 53, the upside of connecting piece annular surface 53 is equipped with annular last check valve 6.
As shown in FIGS. 5 and 6, in order to reduce the pressure for aspiration and injection and to increase the flow path of the liquid medicine, the length of the concave groove 24 is equal to the length of the inner wall of the lower needle holder frustum 23.
In order to improve the sealing effect between the connecting piece inner cylinder 52 and the lower one-way valve 3, the lower end opening of the connecting piece inner cylinder 52 is in a horn shape matched with the lower one-way valve 3.
In order to firmly fix the upper check valve 6 on the connecting piece inner cylinder 52, an annular groove is arranged at the upper end of the outer side wall of the connecting piece inner cylinder 52, and the upper check valve 6 is arranged in the annular groove. Thus, the injection pressure can only open the gap between the outer circumference of the upper check valve 6 and the annular surface 53 of the coupling, without the entire upper check valve 6 falling off the coupling inner cylinder 52.
The diameter of the lower end of the connector through hole 54 is larger than that of the upper end of the connector through hole 54.
The upper needle base 7 further comprises an upper needle base annular surface 75, the inner circle of the upper needle base annular surface 75 is connected with the big circle of the upper needle base frustum 72, and the outer circle of the upper needle base annular surface 75 is vertically connected with the upper needle base outer cylinder 71.
And positioning ribs 73 are uniformly distributed on the outer side walls of the steel needle fixing seat 74 and the upper needle seat frustum 72.
The working process of the example is as follows:
as shown in fig. 5, the utility model discloses when going out liquid filtration syringe feed liquor, under the pressure effect of imbibition, go up check valve 6 and close, the clearance between barrel 52 lower extreme is opened in lower check valve 3 and the connecting piece, and the liquid medicine enters into the cavity of connecting piece toroidal surface 53 below in the barrel 52 in the connecting piece, then enters into lower needle holder through-hole 25 through the recess on lower needle holder frustum 23, then enters into in the awl head cavity 22.
As shown in fig. 6, when the liquid is injected, the lower check valve 3 is separated from the lower needle seat frustum 23 under the action of pressure, the lower check valve 3 is tightly attached to the lower end of the inner cylinder 52 of the connecting piece, the liquid medicine flows upwards through the groove 24 on the lower needle seat frustum 23, passes through the filtering membrane, passes through the connecting piece through hole 54 on the annular surface 53 of the connecting piece under the action of pressure, the gap between the upper check valve 6 and the annular surface 53 of the connecting piece is opened, and the filtered liquid medicine is discharged from the steel needle 8.
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 (7)
1. Go out liquid and filter syringe, including syringe and syringe needle, its characterized in that: the injection needle comprises a lower needle seat, a lower one-way valve, a filtering membrane, a connecting piece, an upper one-way valve, an upper needle seat and a steel needle fixed on the upper needle seat, wherein the lower needle seat comprises a conical head cavity, a lower needle seat frustum and a lower needle seat outer barrel, the conical head cavity is connected with an injector conical head, the small end of the lower needle seat frustum is connected with the conical head cavity, the large end of the lower needle seat frustum is connected with the lower needle seat outer barrel, and a plurality of grooves are uniformly distributed on the circumference of the inner side wall of the lower needle seat frustum; the connecting piece comprises a connecting piece outer cylinder, a connecting piece annular surface and a connecting piece inner cylinder, wherein the excircle of the connecting piece annular surface is vertically connected with the connecting piece outer cylinder, the inner circle of the connecting piece annular surface is vertically connected with the connecting piece inner cylinder, and a plurality of connecting piece through holes are uniformly distributed on the circumference of the connecting piece annular surface; the lower one-way valve is an elastic ball body arranged in the lower needle seat frustum; go up the needle file and include the outer barrel of last needle file, go up needle file frustum and steel needle fixing base, the great circle of going up the needle file frustum is connected with the one end of the outer barrel of last needle file, the small circle of going up the needle file frustum is connected with the steel needle fixing base of cylinder, the steel needle sets up on the steel needle fixing base, the lower extreme of the lateral wall of the outer barrel of connecting piece and the inside wall interference fit of the outer barrel of needle file down, the upper end of the lateral wall of the outer barrel of connecting piece and the inside wall interference fit of the outer barrel of last needle file, the ball footpath of check valve is greater than needle file frustum tip diameter down, annular filtration membrane sets up the downside at the connecting piece annular face, the upside of connecting piece annular face is equipped with annular last check valve.
2. The tapping filtration syringe of claim 1, wherein: the length of the groove is equal to that of the inner side wall of the lower needle seat frustum.
3. The tapping filtration syringe of claim 2, wherein: the lower end opening of the connecting piece inner cylinder body is in a horn shape matched with the lower one-way valve.
4. The tapping filtration syringe of any one of claims 1 to 3, characterized in that: the upper end of the outer side wall of the connecting piece inner cylinder body is provided with an annular groove, and the upper check valve is arranged in the annular groove.
5. The tapping filtration syringe of claim 4, wherein: the diameter of the lower end of the through hole of the connecting piece is larger than that of the upper end of the through hole of the connecting piece.
6. The tapping filtration syringe of claim 5, wherein: the upper needle base also comprises an annular surface of the upper needle base, the inner circle of the annular surface of the upper needle base is connected with the big circle of the frustum of the upper needle base, and the outer circle of the annular surface of the upper needle base is vertically connected with the outer barrel of the upper needle base.
7. The tapping filtration syringe of claim 6, wherein: and positioning ribs are uniformly distributed on the outer side walls of the steel needle fixing seat and the upper needle seat frustum in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822114106.0U CN210009460U (en) | 2018-12-17 | 2018-12-17 | Liquid outlet filtering injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822114106.0U CN210009460U (en) | 2018-12-17 | 2018-12-17 | Liquid outlet filtering injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210009460U true CN210009460U (en) | 2020-02-04 |
Family
ID=69311965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822114106.0U Active CN210009460U (en) | 2018-12-17 | 2018-12-17 | Liquid outlet filtering injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210009460U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432549A (en) * | 2018-12-17 | 2019-03-08 | 山东威高集团医用高分子制品股份有限公司 | Filtering exudate syringe |
-
2018
- 2018-12-17 CN CN201822114106.0U patent/CN210009460U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432549A (en) * | 2018-12-17 | 2019-03-08 | 山东威高集团医用高分子制品股份有限公司 | Filtering exudate syringe |
| CN109432549B (en) * | 2018-12-17 | 2023-12-29 | 山东威高集团医用高分子制品股份有限公司 | Liquid outlet filtering injector |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |