CN100457204C - Needle tube capable of injecting two kinds of medicine liquids - Google Patents
Needle tube capable of injecting two kinds of medicine liquids Download PDFInfo
- Publication number
- CN100457204C CN100457204C CNB2004100534819A CN200410053481A CN100457204C CN 100457204 C CN100457204 C CN 100457204C CN B2004100534819 A CNB2004100534819 A CN B2004100534819A CN 200410053481 A CN200410053481 A CN 200410053481A CN 100457204 C CN100457204 C CN 100457204C
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- syringe
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- inner shell
- valve
- shell
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Abstract
The needle tube for injecting two kinds of medicine liquid includes tube body with liquid inlet in one end, large piston contacting the inside wall of the tube body via sealing ring, small piston fixed to the upper surface of the large piston with locating lobe, inner tube shell between the locating lobe and the tube body and with lower opening below the locating lobe, small sealing ring set between the small piston and the inner tube shell, and liquid inlet switch set in the upper opening of the inner tube shell.
Description
Technical field
The present invention relates to a kind of medical apparatus, particularly a kind of syringe.
Background technology
At present, hospital needs the contrast agent to the human injection sometimes when making CT examination.Contrast agent is a kind of highdensity medicinal liquid, and it can make intravital some " focus " the clear demonstration of people.In the process of human vas liquid medicine injection, enhanced ct scans, in the catheter between syringe liquid outlet and the syringe needle and in the blood vessel pathway, be detained a large amount of high concentration contrast agent.The contrast agent of this delay can not play due reinforced effects on the one hand, causes meaningless waste; Sometimes also can influence image on the other hand.In order to overcome above-mentioned defective, the someone adopts crosspointer cartridge type syringe to wash by water, and has promptly injected behind the contrast agent injecting normal saline immediately, utilizes normal saline that catheter and endovascular contrast agent are all poured in the body circulation.Though operation can address the aforementioned drawbacks like this, crosspointer cartridge type syringe uses inconvenient, and cost is higher, has increased patient's financial burden virtually.
Summary of the invention
At the deficiencies in the prior art part, the invention provides the syringe that a kind of cost is low, easy to operate, can inject two kinds of medicinal liquids.
The present invention is to realize by such technical scheme for reaching above purpose: a kind of syringe that can inject two kinds of medicinal liquids is provided, comprises that the big piston, the big piston that are positioned at inner barrel are provided with lip ring; Lip ring contacts with cylinder inner surface, the inner surface of big piston and cylindrical shell is slidingly connected, one end of cylindrical shell is provided with fluid-through port, the valve piston that the upper end is provided with positioning boss is fixed on the upper surface of big piston, the syringe inner shell is set between positioning boss and cylindrical shell, and the lower open end of syringe inner shell is positioned at the below of positioning boss; On positioning boss, be provided with the ring packing piece, the ring packing piece contacts with the inner surface of syringe inner shell, the inner surface of valve piston and syringe inner shell is slidingly connected, and the upper open end of syringe inner shell is provided with the feed liquor switch, is provided for controlling the poke rod of feed liquor switch work at the fluid-through port place of cylindrical shell.
As a kind of improvement of the present invention: the feed liquor switch comprises the spring part that is positioned at syringe inner shell inside and fixes with the syringe inner shell, valve is connected with spring part, the upper open end of syringe inner shell is provided with the opening locating surface, and valve is opening locating surface sealing contact therewith; The poke rod that is arranged on the fluid-through port place is corresponding with valve.
As another improvement of the present invention: an end of poke rod has barb, and poke rod is provided with steam vent.
Improve as another kind of the present invention: spring part is the rubber-like photoplate.
As another improvement of the present invention: the outer surface of positioning boss is provided with groove, and the ring packing piece is positioned in the described groove.
The present invention is owing to added the little space that can store second kind of medicinal liquid of being made up of valve piston, syringe inner shell, valve in the cylindrical shell of conventional syringes, therefore the complete estrangement of large space energy of first kind of medicinal liquid of storage can not cause the mixing of two kinds of medicinal liquids in this little space and the cylindrical shell; Come opening or closing of by-pass valve control by poke rod, make two kinds of medicinal liquids be independent of each other, can successively inject again; Therefore can realize that single syringe injects two kinds of different medicinal liquids respectively.The barb that is provided with on the poke rod can hook the opening locating surface that contacts with valve seal, convenient medicinal liquid and the liquid medicine injection of sucking.The present invention is simple, with low cost with respect to crosspointer cartridge type syringe construction, can save patient's medical expense.Only rely on during use to promote a big piston with regard to two kinds of different medicinal liquids of injection before and after realizing, therefore easy to use, be suitable for large-scale promotion and be suitable for.
Description of drawings
Fig. 1 is the sectional structure sketch map of syringe of the present invention;
Fig. 2 is the enlarged diagram of the poke rod 2 among Fig. 1;
Fig. 3 is the original state sketch map of syringe of the present invention;
Fig. 4 is a valve 7 when being backed down, the view of syringe of the present invention;
Fig. 5 is the view after syringe of the present invention is finished first kind of medicinal liquid 19 of suction;
Fig. 6 is the view after syringe of the present invention is finished second kind of medicinal liquid 20 of suction.
The specific embodiment
With reference to above-mentioned accompanying drawing, the specific embodiment of the present invention is elaborated.Fig. 1 has provided a kind of syringe that can inject two kinds of medicinal liquids, comprises that one one end is provided with the cylindrical shell 5 of fluid-through port 1, and there is a big piston 9 inside of cylindrical shell 5, and the outer surface of big piston 9 is provided with lip ring 10; Lip ring 10 contacts with cylindrical shell 5 inner surfacies, and purpose is in order to seal, and big piston 9 can slide up and down along the inner surface of cylindrical shell 5.Valve piston 11 is fixed on the upper surface of big piston 9, and the upper end of valve piston 11 is provided with positioning boss 14, and the diameter of positioning boss 14 is greater than the diameter of valve piston 11, and the interface of positioning boss 14 and valve piston 11 forms step surface 17.Syringe inner shell 15 is enclosed between positioning boss 14 and the cylindrical shell 5, so the interior diameter of syringe inner shell 15 is greater than the diameter of positioning boss 14, and the overall diameter of syringe inner shell 15 is less than the interior diameter of cylindrical shell 5.The outer surface of positioning boss 14 is provided with groove, is placed with the ring packing piece 13 that matches with its shape in the groove, and ring packing piece 13 contacts with the inner surface of syringe inner shell 15, plays sealing function.Syringe inner shell 15 and valve piston 11 flexibly connects, and promptly positioning boss 14 can drive valve piston 11 and slides up and down along the inner surface of syringe inner shell 15.The lower open end 12 of syringe inner shell 15 is positioned at the below of positioning boss 14, and promptly lower open end 12 is positioned at the below of step surface 17.When positioning boss 14 to lower slider, when step surface 17 contacts with lower open end 12, be positioned.When positioning boss 14 upwards slided, when the top of positioning boss 14 contacted with the inner surface of syringe inner shell 15, positioning boss 14 just was positioned.The upper open end 6 of syringe inner shell 15 is provided with the feed liquor switch.This feed liquor switch comprises the elastic emulsion sheet 8 that is positioned at syringe inner shell inside and fixes with the syringe inner shell, and this elastic emulsion sheet 8 should guarantee that medicinal liquid can enter in the cavity of syringe inner shell 15 from upper open end 6, therefore can be designed to strip.Valve 7 is fixed together with elastic emulsion sheet 8; The upper open end 6 of syringe inner shell 15 is provided with opening locating surface 16, and valve 7 is done the time spent not being subjected to external force, and it contact with 16 sealings of opening locating surface, and the inside of assurance syringe inner shell 15 becomes the little space of a sealing.2 poke rods 2 evenly are set on the inner surface of the cylindrical shell 5 that is positioned at fluid-through port 1 place, be equipped with steam vent 3 on the body of rod of each poke rod 2, steam vent 3 is designed to the slanted angle at 45 with horizontal plane (near the center height of cylindrical shell 5), and perforation poke rod 2, when sucking second kind of medicinal liquid, carry out aerofluxus from the bottom up by steam vent 3.The lower end of each poke rod 2 all is provided with barb 4, has one to be used for localized barb locating surface 18 on the barb 4, and poke rod 2 should be in and valve 7 corresponding positions.When syringe inner shell 15 moves upward with respect to poke rod 2 (being equivalent to poke rod 2 moves downward with respect to syringe inner shell 15), poke rod 2 drives barb 4 and backs down valve 7 downwards, and valve 7 just is separated with opening locating surface 16 like this; Barb 4 continues to glide and enters syringe inner shell 15 inside, is positioned at the below of opening locating surface 16 and tightly props up opening locating surface 16 until barb locating surface 18.For in the later job step, can allow barb locating surface 18 break away from opening locating surface 16 during real work, barb locating surface 18 is designed to certain gradient, and is slightly high near this end of cylindrical shell 5 centrages, as shown in Figure 2.
Syringe practical work process of the present invention is as follows:
(1), sucks first kind of medicinal liquid 19.As shown in Figure 3, syringe is positioned at initial original position.Upwards promote big piston 9, big piston 9 drives valve piston 11, syringe inner shell 15 moves upward, and backs down valve 7 until barb 4, and at this moment valve 7 is separated with opening locating surface 16.Barb 4 continues descending relatively, is positioned at the below of opening locating surface 16 and tightly props up opening locating surface 16 until barb locating surface 18, and the syringe state of this moment as shown in Figure 4.Spur big piston 9 then downwards and begin to suck first kind of medicinal liquid 19.Big piston 9 drives valve piston 11 and moves downward, medicinal liquid 19 slowly enters the inner chamber of syringe inner shell 15 from the fluid-through port 1 of cylindrical shell 5, step surface 17 until positioning boss 14 contacts with lower open end 12, at this moment sucks the end-of-job of first kind of medicinal liquid 19, and the syringe state of this moment as shown in Figure 5.Continue firmly to spur big piston 9 downwards, syringe inner shell 15 is driven to be moved downward, the barb locating surface 18 opening locating surface 16 that slips away, valve 7 moves upward under the effect of the restoring force of elastic emulsion sheet 8, contacts until sealing with opening locating surface 16, and such first kind of medicinal liquid 19 just is sealed in the inner chamber of syringe inner shell 15.
(2), suck second kind of medicinal liquid 20.Syringe inner shell 15 continues to move downward, and at this moment begins to suck second kind of medicinal liquid 20, and the syringe state of this moment as shown in Figure 6.
(3), inject second kind of medicinal liquid 20 earlier.Upwards promote of fluid-through port 1 outflow of 9, the second kinds of medicinal liquids 20 of big piston from cylindrical shell 5.
(4), inject first kind of medicinal liquid 19 again.Continue upwards to promote big piston 9, back down valve 7 until barb 4, barb 4 continues descending relatively, is positioned at the below of opening locating surface 16 and tightly props up opening locating surface 16 until barb locating surface 18, continue again upwards to promote big piston 9, with regard to first kind of medicinal liquid 19 of start injection.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (6)
1, a kind of syringe that can inject two kinds of medicinal liquids comprises being positioned at the inner big piston (9) of cylindrical shell (5) that big piston (9) is provided with lip ring (10); Lip ring (10) contacts with cylindrical shell (5) inner surface, big piston (9) is slidingly connected with the inner surface of cylindrical shell (5), the upper end of cylindrical shell (5) is provided with fluid-through port (1), it is characterized in that: the valve piston (11) that the upper end is provided with positioning boss (14) is fixed on the upper surface of described big piston (9), between positioning boss (14) and cylindrical shell (5) syringe inner shell (15) is set, the lower open end (12) of described syringe inner shell (15) is positioned at the below of positioning boss (14); On described positioning boss (14), be provided with ring packing piece (13), described ring packing piece (13) contacts with the inner surface of syringe inner shell (15), valve piston (11) is slidingly connected with the inner surface of syringe inner shell (15), the setting of the upper open end (6) of described syringe inner shell (15) is contained the feed liquor switch of valve (7), locates to be provided for the poke rod (2) that by-pass valve control (7) opens or closes at the fluid-through port (1) of cylindrical shell (5).
2, the syringe that can inject two kinds of medicinal liquids according to claim 1, it is characterized in that: described feed liquor switch comprises the spring part (8) that is positioned at described syringe inner shell (15) inside and fixes with syringe inner shell (15), and valve (7) is connected with described spring part (8); The upper open end of syringe inner shell (6) is provided with opening locating surface (16), and described valve (7) contacts with opening locating surface (16) sealing.
3, the syringe that can inject two kinds of medicinal liquids according to claim 2 is characterized in that: the lower end of described poke rod (2) has barb (4).
4, the syringe that can inject two kinds of medicinal liquids according to claim 3 is characterized in that: described poke rod (2) is provided with steam vent (3).
5, the syringe that can inject two kinds of medicinal liquids according to claim 4 is characterized in that: described spring part (8) is the rubber-like photoplate.
6, the syringe that can inject two kinds of medicinal liquids according to claim 1 is characterized in that: the outer surface of described positioning boss (14) is provided with groove, and ring packing piece (13) is positioned in the described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534819A CN100457204C (en) | 2004-07-30 | 2004-07-30 | Needle tube capable of injecting two kinds of medicine liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534819A CN100457204C (en) | 2004-07-30 | 2004-07-30 | Needle tube capable of injecting two kinds of medicine liquids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1586644A CN1586644A (en) | 2005-03-02 |
| CN100457204C true CN100457204C (en) | 2009-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100534819A Expired - Fee Related CN100457204C (en) | 2004-07-30 | 2004-07-30 | Needle tube capable of injecting two kinds of medicine liquids |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100457204C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502687B (en) * | 2008-02-04 | 2011-05-04 | 龚静山 | Monotubular double-chamber syringe needle cylinder |
| IT201600075511A1 (en) * | 2016-07-19 | 2018-01-19 | Orofino Pharmaceuticals Group Srl | PRE-FILLED INJECTION DEVICE WITH MULTIPLE CHAMBER WITH CARTRIDGE |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453934A (en) * | 1981-11-11 | 1984-06-12 | Contraves Ag | Injection syringe for the successive injection of two liquids into the blood vessels of living bodies |
| CN2388955Y (en) * | 1999-09-30 | 2000-07-26 | 夏黎明 | Double-tube quick CT intensified transfusion apparatus |
| US6228065B1 (en) * | 1994-02-15 | 2001-05-08 | Lawrence A. Lynn | Displacement activated medical check valve |
| US6723074B1 (en) * | 2002-04-09 | 2004-04-20 | Thor R. Halseth | Sequential delivery syringe |
| CN2803401Y (en) * | 2004-07-30 | 2006-08-09 | 赵福元 | Irrigator |
-
2004
- 2004-07-30 CN CNB2004100534819A patent/CN100457204C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453934A (en) * | 1981-11-11 | 1984-06-12 | Contraves Ag | Injection syringe for the successive injection of two liquids into the blood vessels of living bodies |
| US6228065B1 (en) * | 1994-02-15 | 2001-05-08 | Lawrence A. Lynn | Displacement activated medical check valve |
| CN2388955Y (en) * | 1999-09-30 | 2000-07-26 | 夏黎明 | Double-tube quick CT intensified transfusion apparatus |
| US6723074B1 (en) * | 2002-04-09 | 2004-04-20 | Thor R. Halseth | Sequential delivery syringe |
| CN2803401Y (en) * | 2004-07-30 | 2006-08-09 | 赵福元 | Irrigator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1586644A (en) | 2005-03-02 |
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Granted publication date: 20090204 |