CN2880117Y - Double-chamber perfilling injector with sealing cap - Google Patents
Double-chamber perfilling injector with sealing cap Download PDFInfo
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- CN2880117Y CN2880117Y CN 200520052593 CN200520052593U CN2880117Y CN 2880117 Y CN2880117 Y CN 2880117Y CN 200520052593 CN200520052593 CN 200520052593 CN 200520052593 U CN200520052593 U CN 200520052593U CN 2880117 Y CN2880117 Y CN 2880117Y
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- piston
- cylindrical shell
- injection tube
- chamber
- upper piston
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Abstract
The utility model relates to a double-chamber pre-filled syringe with a sealing cap, comprising an injection cylinder which comprises an upper segment with greater cylinder radius and a lower segment with smaller cylinder radius. One end of the injection cylinder is connected with a union joint and the other is an open end. The union joint is connected with a sealing cap to seal the liquid-exiting opening. Within the injection cylinder, an upper and a lower piston are arranged in the upper segment and the lower segment cylinders, respectively. The pistons are communicated in pressurization with the inner wall of the cylinder and separate the injection cylinder into an upper and a lower sealed chamber for the repackage of injectable preparation and diluting solution. A connector bar connects the upper and the lower pistons, with the end of the upper piston connected with the opening with an upper piston stick extending outside of the syringe opening. The pulling of the upper piston will make the lower piston move to the upper segment of the cylinder, resulting in the communication of the upper and the lower chambers. The utility model can store at the same time the injectable preparation and the diluting solution in the same syringe so that dispense and injection can be finished once at the same time. The utility model has advantages of simple operation, avoidance of pollution during the process of drug preparation, low cost and so on.
Description
Technical field
This utility model belongs to the medical packaging field, is specifically related to a kind of pre-charge injector.
Background technology
At present, the syringe that each medical institutions generally uses is the syringe of injecting immediately behind the pumping liquid, and some pre-charge injectors by pharmaceutical factory's prepackage medicinal liquid are also arranged.Pre-charge injector on the market is a single chamber, and only adorns a kind of syringe of liquid medicine, is generally used for being worth higher medicine.Because physics, the chemical characteristic difference of medicine, a lot of medicines could prolong the shelf life with the drying regime package storage.Therefore in hospital's injection process, must extract the required dilute solution of this class medicine with syringe earlier, inject the container that the drying regime medicine is housed, the mixed liquid medicine injection that shakes up into, the same syringe of reuse extracts this medicinal liquid and injects in the human body.
The using method of above-mentioned syringe at present commonly used, complicated operation is loaded down with trivial details on the one hand, is easy to generate pollution in the preparation injection process; Medicine and dilute solution are packed with different vessels respectively on the other hand, produce, use cost is higher.
The utility model content
Technical problem to be solved in the utility model is the defective that overcomes above-mentioned prior art, providing a kind of can be stored in injection medicine (dry shape medicine or liquid medicine) and dilute solution in the same syringe simultaneously, two kinds of medicines are divided in two confined chambers during storage, can mix easily during use, realization is made up a prescription and is injected disposable finishing, easy and simple to handle, can avoid preparing the pollution that produces in the injection process, the two-chamber prefilled syringe of the band sealing cap that use cost is low.
For solving the problems of the technologies described above, this utility model adopts following technical proposals.
A kind of two-chamber prefilled syringe with sealing cap, it is characterized in that it comprises the injection tube of being made up of bigger cylindrical shell epimere of barrel dliameter and the less cylindrical shell hypomere of barrel dliameter, the bottom that injection tube is positioned at cylindrical shell hypomere one end is provided with the union joint that connects entry needle, the center of union joint is provided with the liquid outlet that communicates with the injection tube inner chamber, be arranged with a sealing cap on the union joint, with the liquid outlet sealing, the top that injection tube is positioned at cylindrical shell epimere one end is an opening; Be provided with upper piston and lower piston in the injection tube, lower piston places the cylindrical shell hypomere, and combine with the inner wall sealing of cylindrical shell hypomere, be separated out airtight lower chamber in injection tube, upper piston places the cylindrical shell epimere, and combines with the inner wall sealing of cylindrical shell epimere, in injection tube, be separated out airtight upper chamber, connected by piston brace rod between upper piston and the lower piston, the end that upper piston is relative with the injection tube opening is connected with a upper piston rod, and described upper piston rod extends to outside the injection tube opening.
As further improvement of the utility model, the end that described lower piston links to each other with piston brace rod offers screw, the two ends of upper piston all offer screw, and the two ends of described piston brace rod are provided with external screw thread, and piston brace rod is connected with lower piston with upper piston by screw thread; Described upper piston rod one end is provided with external screw thread, with upper piston by being threaded, the other end is provided with handle.
The body of rod of described piston brace rod is provided with groove.
Described union joint is a cone.
Described piston brace rod and upper piston rod adopt medical plastic to make, and upper and lower piston adopts medical grade rubber to make.
The beneficial effects of the utility model are: the two-chamber prefilled syringe of this utility model band sealing cap adopts has the injection tube that two sections different cylindrical shells of barrel dliameter are formed, and in injection tube, be provided with barrel dliameter supporting on, following two pistons, in the syringe cylinder inner chamber, be separated out airtight on, following two chambers, storage at as prepackage injection medicine and dilute solution, can simultaneously injection medicine (dry shape medicine or liquid medicine) and dilute solution be stored in two airtight chambers of same syringe, use the above two to separate fully, can mix easily during use, realization is made up a prescription and is injected disposable finishing, easy and simple to handle, avoided preparing the pollution that produces in the injection process, and simple in structure, the production use cost is low.
Description of drawings
Fig. 1 is the structural representation cutaway view of this utility model embodiment;
Fig. 2 is the cutaway view of this utility model embodiment injection tube;
Fig. 3 is the cutaway view of lower piston;
Fig. 4 is the front view of piston brace rod;
Fig. 5 is the vertical view cutaway drawing of piston brace rod;
Fig. 6 is the cutaway view of upper piston;
Fig. 7 is the front view of upper piston rod;
Fig. 8 is the vertical view of upper piston rod.
Each label is represented among the figure:
1, injection tube 2, lower piston
3, piston brace rod 4, upper piston
5, upper piston rod 6, lower chamber
7, upper chamber 8, dilute solution
9, injection medicine 10, sealing cap
11, union joint 12, cylindrical shell epimere
13, cylindrical shell hypomere 111, liquid outlet
31, groove 51, handle
The specific embodiment
As shown in Figure 1, 2, the two-chamber prefilled syringe of this utility model band sealing cap, comprise the injection tube of forming by bigger cylindrical shell epimere 12 of barrel dliameter and the less cylindrical shell hypomere 13 of barrel dliameter 1, the bottom that injection tube 1 is positioned at cylindrical shell hypomere 13 1 ends is formed with the cone-shaped union joint 11 that connects entry needle, the center of union joint 11 is provided with the liquid outlet 111 that communicates with the injection tube inner chamber, be arranged with a sealing cap 10 on the union joint 11,, make it be in closed state liquid outlet 111 sealings.The top that injection tube 1 is positioned at cylindrical shell epimere 12 1 ends is an opening; Be provided with upper piston 4 and lower piston 2 in the injection tube 1, lower piston 2 places cylindrical shell hypomere 13, and combine with the inner wall sealing of cylindrical shell hypomere 13, in injection tube 1, be separated out end face by lower piston 2, the airtight lower chamber 6 that the inwall of cylindrical shell hypomere 13 and injection tube bottom form, upper piston 4 places cylindrical shell epimere 12, and combine with the inner wall sealing of cylindrical shell epimere 12, in injection tube 1, be separated out by on, lower piston 4, the airtight upper chamber 7 that 2 relative two end faces and cylinder inboard wall are formed, lower chamber 6 and upper chamber 7 are as the storage at of prepackage injection medicine 9 with dilute solution 8, can pour into injection medicine 9 (dry shape medicine or liquid medicine) in the lower chamber 6, perfusion dilute solution 8 in the upper chamber 7.Connect by piston brace rod 3 between upper piston 4 and the lower piston 2, the end that lower piston 2 links to each other with piston brace rod 3 offers the screw (see figure 3), the two ends of upper piston 4 all offer the screw (see figure 6), the two ends of piston brace rod 3 are provided with external screw thread (seeing Fig. 4,5), piston brace rod 3 is connected with lower piston 2 with upper piston 4 by screw thread, the interlock of assurance two-piston is provided with groove 31 on the body of rod of piston brace rod 3, to increase the volume of upper chamber 7.The end that upper piston 4 is relative with injection tube 1 opening is connected with a upper piston rod 5, shown in Fig. 7,8, these upper piston rod 5 one ends are provided with external screw thread, with upper piston 4 by being threaded, the other end of upper piston rod 5 extends to outside injection tube 1 opening, supply operation usefulness, and be provided with handle 51, be convenient to injection operation in its end.Piston brace rod 3 and upper piston rod 5 adopt medical plastic to make, and upper and lower piston 4,2 adopts medical grade rubber to make.
The process of this utility model pre-filling injection agent medicine 9 and dilute solution 8 is: at first injection medicine 9 (dry shape medicine or liquid medicine) is poured into the less cylindrical shell hypomere 13 of barrel dliameter in the injection tube 1, this moment, liquid outlet 111 was by sealing cap 10 sealings, can be pressed into cylindrical shell hypomere 13 with the bonded lower piston 2 of cylindrical shell hypomere 13 inner wall sealings, form the airtight lower chamber 6 that has poured into injection medicine 9, aerofluxus in the time of tamponade makes lower chamber 6 be in normal pressure and sealing; Piston brace rod 3 is screwed in lower piston 2, dilute solution 8 is poured in the space between piston brace rod 3 and the injection tube 1, upper piston 4 is pressed into syringe cylinder 1, and be close to piston brace rod 3, form the airtight upper chamber 7 that has poured into dilute solution 8, aerofluxus in the time of tamponade makes upper chamber 7 be in normal pressure and sealing; Upper piston rod 5 and upper piston 4 by being threaded, and are continued rotation, also by being threaded, so just finished the process of the prepackage injection medicine 9 and the dilute solution 8 of two-chamber prefilled syringe until upper piston 4 and piston brace rod 3.During use, upper piston rod 5 is pulled outward, making lower piston 2 retreat to injection tube 1 upper chamber 7 by cylindrical shell hypomere 13 positions is the position of cylindrical shell epimere 12, because of the barrel dliameter of cylindrical shell epimere 12 barrel dliameter greater than cylindrical shell hypomere 13, upper and lower part chamber 7,6 intercommunications like this, thus make the dilute solution 8 in the upper chamber 7 be mixed into injection with injection medicine 9 in the lower chamber 6.This two-chamber prefilled syringe is erected, make union joint 11 be in the below, injection concentrates in the cylindrical shell hypomere 13, upper piston rod 5 is pushed again, and makes lower piston 2 enter cylindrical shell hypomere 13, has finished the process of making up a prescription like this.Sealing cap 10 is taken off, and liquid outlet 111 is opened, and entry needle is contained in cone-shaped union joint 11 places, can carry out injection operation.
Claims (5)
1, a kind of two-chamber prefilled syringe with sealing cap, it is characterized in that it comprises the injection tube of being made up of bigger cylindrical shell epimere (12) of barrel dliameter and the less cylindrical shell hypomere (13) of barrel dliameter (1), the bottom that injection tube (1) is positioned at cylindrical shell hypomere (13) one ends is provided with the union joint (11) that connects entry needle, the center of union joint (11) is provided with the liquid outlet (111) that communicates with the injection tube inner chamber, be arranged with a sealing cap (10) on the union joint (11), with liquid outlet (111) sealing, the top that injection tube (1) is positioned at cylindrical shell epimere (12) one ends is an opening; Be provided with upper piston (4) and lower piston (2) in the injection tube (1), lower piston (2) places cylindrical shell hypomere (13), and combine with the inner wall sealing of cylindrical shell hypomere (13), in injection tube (1), be separated out airtight lower chamber (6), upper piston (4) places cylindrical shell epimere (12), and combine with the inner wall sealing of cylindrical shell epimere (12), in injection tube (1), be separated out airtight upper chamber (7), connect by piston brace rod (3) between upper piston (4) and the lower piston (2), the end that upper piston (4) is relative with injection tube (1) opening is connected with a upper piston rod (5), and described upper piston rod (5) extends to outside injection tube (1) opening.
2, the two-chamber prefilled syringe of band sealing cap according to claim 1, it is characterized in that described lower piston (2) offers screw with the end that piston brace rod (3) links to each other, the two ends of upper piston (4) all offer screw, the two ends of described piston brace rod (3) are provided with external screw thread, and piston brace rod (3) is connected with lower piston (2) with upper piston (4) by screw thread; Described upper piston rod (5) one ends are provided with external screw thread, with upper piston (4) by being threaded, the other end is provided with handle (51).
3, the two-chamber prefilled syringe of band sealing cap according to claim 1 and 2 is characterized in that the body of rod of described piston brace rod (3) is provided with groove (31).
4, the two-chamber prefilled syringe of band sealing cap according to claim 3 is characterized in that described union joint (11) is cone.
5, the two-chamber prefilled syringe of band sealing cap according to claim 4 is characterized in that described piston brace rod (3) and upper piston rod (5) adopt medical plastic to make, and upper and lower piston (4,2) adopts medical grade rubber to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052593 CN2880117Y (en) | 2005-11-30 | 2005-11-30 | Double-chamber perfilling injector with sealing cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052593 CN2880117Y (en) | 2005-11-30 | 2005-11-30 | Double-chamber perfilling injector with sealing cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2880117Y true CN2880117Y (en) | 2007-03-21 |
Family
ID=37879957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520052593 Expired - Lifetime CN2880117Y (en) | 2005-11-30 | 2005-11-30 | Double-chamber perfilling injector with sealing cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2880117Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921071A (en) * | 2012-10-30 | 2013-02-13 | 无锡耐思生物科技有限公司 | Mixing and prefilling syringe structure |
| CN102940921A (en) * | 2012-10-30 | 2013-02-27 | 无锡耐思生物科技有限公司 | Powder-injection mixing pre-filled and sealed injector structure |
| CN109200449A (en) * | 2018-09-29 | 2019-01-15 | 姜鸣 | A kind of pre-filled two-chamber injector |
| CN110353855A (en) * | 2019-07-24 | 2019-10-22 | 兰州大学 | A kind of pharmacological experiment intragastric administration on mice device and its application method |
-
2005
- 2005-11-30 CN CN 200520052593 patent/CN2880117Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921071A (en) * | 2012-10-30 | 2013-02-13 | 无锡耐思生物科技有限公司 | Mixing and prefilling syringe structure |
| CN102940921A (en) * | 2012-10-30 | 2013-02-27 | 无锡耐思生物科技有限公司 | Powder-injection mixing pre-filled and sealed injector structure |
| CN109200449A (en) * | 2018-09-29 | 2019-01-15 | 姜鸣 | A kind of pre-filled two-chamber injector |
| CN110353855A (en) * | 2019-07-24 | 2019-10-22 | 兰州大学 | A kind of pharmacological experiment intragastric administration on mice device and its application method |
| CN110353855B (en) * | 2019-07-24 | 2021-11-19 | 兰州大学 | Mouse gastric perfusion device for pharmacology experiments and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070321 |
|
| EXPY | Termination of patent right or utility model |