CN2860496Y - Pre-filled injector with sealed cap for mixed drug injection - Google Patents
Pre-filled injector with sealed cap for mixed drug injection Download PDFInfo
- Publication number
- CN2860496Y CN2860496Y CN 200520052974 CN200520052974U CN2860496Y CN 2860496 Y CN2860496 Y CN 2860496Y CN 200520052974 CN200520052974 CN 200520052974 CN 200520052974 U CN200520052974 U CN 200520052974U CN 2860496 Y CN2860496 Y CN 2860496Y
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- CN
- China
- Prior art keywords
- injection tube
- piston
- injection
- end cover
- syringe barrel
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- 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.)
- Expired - Lifetime
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Abstract
A pre-filling syringe mixing the medicines of the injection with a sealed cap includes a syringe barrel and the piston rods, wherein the bottom of the syringe barrel has a connection head which is connected with the sealed cap which seals the liquid outlet. The top of the syringe barrel has an opening, while the barrel wall has an outer convex channel; and the syringe barrel is provided with the upper and lower pistons which connect with the inner wall of syringe barrel closely, the upper piston is on the opening of the syringe barrel, while the lower piston is on the outer convex channel which is below the upper piston, such two pistons separate the syringe barrel to close upper and lower cavities; the top of the syringe barrel has an end cover, while the lower end of the piston rod is connected to the screw of the end cover through the bolt of the lower part and the piston rod just closes to the upper piston, and the smooth rod of upper end extends to the outside of the opening of the syringe barrel. Rotate the piston rod to the direction of the syringe barrel through the end cover, making the lower piston back to the middle of the outer convex channel and connect the upper, lower cavities. The utility model can store the medicine of the injection and the dilution solution in the same syringe simultaneously, thus to complete the dispense and the injection at one time, as well as easy to operate, avoid the pollution during the dispensing procedure, low cost to use etc.
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 with the drying regime package storage, could prolong the shelf life as a lot of medicines.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, be divided into before the use in each confined chamber, 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 pre-charge injector of the mixing injection medicines 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.
The pre-charge injector of the mixing injection medicines of this utility model band sealing cap, comprise injection tube and piston rod, the bottom that it is characterized in that described injection tube is provided with the union joint that is used to connect 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, liquid outlet is sealed; The top of injection tube is an opening, the barrel of described injection tube is provided with the evagination passage, be provided with in the injection tube and bonded upper piston of injection tube tube inner wall sealing and lower piston, upper piston places the opening part of injection tube, lower piston places the below of upper piston and is positioned on the evagination passage, upper and lower piston will be separated out airtight upper chamber and lower chamber in the injection tube, the length of lower piston is less than the length of evagination passage; The injection tube top is arranged with an end cover, the endoporus of this end cover is made up of aperture bigger bottom hole and aperture small upper screw, the end cover combines with the injection tube top by bottom hole, the bottom of described piston rod is a screw rod, top is less than or equal to the polished rod of screw flight path for its diameter, the lower end of piston rod is connected by the top screw of screw rod with the end cover, and is close to upper piston, and the upper end of piston rod extends to outside the opening of injection tube.
As further improvement of the utility model, the drum outer wall at described injection tube top is provided with external screw thread, and the bottom hole of described end cover is a screw, and end cover and injection tube are by being threaded.
As another further improvement of the present utility model, the drum outer wall at described injection tube top is provided with the outer rim boss, be provided with groove with outer rim boss corresponding position in the bottom hole of described end cover, described end cover is connected by the outer rim boss pressing that is pressed in the groove with injection tube.
Described evagination passage or be one, or be uniformly distributed along the circumference two or three.
The upper end of described piston rod is provided with handle.
Described piston rod adopts medical plastic to make, and upper and lower piston adopts medical grade rubber to make.
The beneficial effects of the utility model are: the pre-charge injector of the mixing injection medicines of this utility model band sealing cap adopts the injection tube of the cylindrical shell with evagination passage, and in injection tube, be provided with barrel dliameter supporting on, lower piston, 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 1;
Fig. 2 is the cutaway view of injection tube among the embodiment 1;
Fig. 3 is the A-A profile of Fig. 2;
Fig. 4 is the cutaway view of lower piston;
Fig. 5 is the cutaway view of embodiment 1 middle-end cover;
Fig. 6 is the structural representation of piston rod;
Fig. 7 is the structural representation cutaway view of this utility model embodiment 2;
Fig. 8 is the cutaway view of injection tube among the embodiment 2;
Fig. 9 is the cutaway view of embodiment 2 middle-ends cover;
Figure 10 is injection tube another section of structure in evagination passage place.
Figure 11 is the another section of structure at injection bobbin evagination passage place.
Each label is represented among the figure:
1, injection tube 11, sealing cap
12, liquid outlet 13, union joint
14, evagination passage 15, external screw thread
16, outer rim boss
2, lower piston 3, end cover
31, bottom hole 311, groove
32, top screw 4, piston rod
41, screw rod 42, handle
43, polished rod 5, lower chamber
6, upper chamber 7, upper piston
8, dilute solution 9, injection medicine
The specific embodiment
Fig. 1～5 show embodiment 1 of the present utility model, shown in above-mentioned each figure, the pre-charge injector of the mixing injection medicines of this utility model band sealing cap, comprise injection tube 1 and piston rod 4, the bottom of injection tube 1 is provided with the taper connection 13 that is used to connect entry needle, and the center of union joint 13 is provided with the liquid outlet 12 that communicates with injection tube 1 inner chamber, is arranged with a sealing cap 11 on the union joint 13, with liquid outlet 12 sealings, make it be in closed state.The top of injection tube 1 is an opening, the barrel of injection tube 1 is provided with the evagination passage 14 of certain-length, be provided with in the injection tube 1 and bonded upper piston 7 of 1 inner wall sealing of injection tube and lower piston 2, upper piston 7 places the opening part of injection tube 1, lower piston 2 places the below of upper piston 7 and just places evagination passage 14 tops, evagination passage 14 can be arranged at the middle part of injection tube 1, upper and lower piston 7,2 will be separated out airtight upper chamber 6 and lower chamber 5 in the injection tube 1, the length h of lower piston 2 is less than the length H of evagination passage 14; Lower chamber 5 and upper chamber 6 are poured into injection medicine 9 (dry shape medicine or liquid medicine) as the storage at of prepackage injection medicine 9 with dilute solution 8 in the lower chamber 5, perfusion dilute solution 8 in the upper chamber 6.Injection tube 1 top is arranged with end cover 3, the endoporus of this end cover 3 is made up of aperture bigger bottom hole 31 and aperture small upper screw 32, end cover 3 combines with injection tube 1 top by bottom hole 31, in the present embodiment, the drum outer wall at injection tube 1 top is provided with external screw thread 15, the bottom hole 31 of end cover 3 be a screw, and end overlaps 3 fixedlys connected by screw thread with injection tube 1.The bottom of piston rod 4 is a screw rod 41, top is the polished rod 43 (referring to Fig. 6) of its diameter less than the screw thread path of screw rod 41, the lower end of piston rod 4 is connected by the top screw 32 of screw rod 41 with end cover 3, and be close to upper piston 7, the upper end of piston rod 4 extends to outside injection tube 1 opening, for operation usefulness, and the end is provided with handle 42 thereon, is convenient to injection operation.Piston rod 4 adopts medical plastic to make, and upper and lower piston 7,2 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 in the injection tube 1, this moment, the liquid outlet 12 of injection tube 1 was sealed by sealing cap 11, can be pressed in the tube with the bonded lower piston 2 of 1 inner wall sealing of injection tube, and just be positioned at the top of evagination passage 14, form the airtight lower chamber 5 that has poured into injection medicine 9, aerofluxus in the time of tamponade makes lower chamber 5 be in normal pressure and sealing; Dilute solution 8 is poured in the space on the top of lower piston 2 in the injection tube 1, upper piston 7 is pressed in the injection tube 1, form the airtight upper chamber 6 that has poured into dilute solution 8, aerofluxus in the time of tamponade makes upper chamber 6 be in normal pressure and sealing; Injection tube 1 and end cover 3 are fixedlyed connected with threaded bottom hole 31 by external screw thread 15, again in the top screw 32 with the screw rod 41 end screw terminals of piston rod 4 cover 3, and contact upper piston 7, so just finished the process of pre-installing injection medicine 9 and dilute solution 8.During use, piston rod 4 is screwed in toward injection tube 1 direction by the top screw 32 of screw rod 41 with end cover 3, compressing upper piston 7, dilute solution 8 and lower piston 2 move down together, by screw, can make lower piston 2 retreat to the centre of the evagination passage 14 on the injection tube 1 exactly, lower chamber 5 and upper chamber 6 are interconnected by evagination passage 14, and the dilute solution 8 in the upper chamber 6 is mixed into injection with the injection medicine 9 in the lower chamber 5.This utility model is erected, make sealing cap 11 be in the below, injection concentrates on the bottom of injection tube 1, has finished the process of making up a prescription like this.Again piston rod 4 is continued to screw in, screw rod 41 breaks away from top screw 32, and polished rod 43 enters in the top screw 32; Sealing cap 11 is taken off, entry needle is contained in taper connection 13 place, just can carry out injection operation.
Fig. 7～9 show embodiment 2 of the present utility model, as different from Example 1: end cover 3 is not by being threaded with injection tube 1, but as shown in the figure, the drum outer wall at injection tube 1 top is provided with outer rim boss 16, be provided with groove 311 with outer rim boss 16 corresponding positions in the bottom hole 31 of end cover 3, end cover 3 is connected by outer rim boss 16 pressing and fixing that are pressed in the groove 311 with injection tube 1.
As Figure 10,11, evagination passage 14 can be one in the various embodiments described above, also can be uniformly distributed along the circumference two or three.
Claims (6)
1, a kind of pre-charge injector of the mixing injection medicines with sealing cap, comprise injection tube (1) and piston rod (4), the bottom that it is characterized in that described injection tube (1) is provided with the union joint (13) that is used to connect entry needle, the center of union joint (13) is provided with the liquid outlet (12) that communicates with injection tube (1) inner chamber, be arranged with a sealing cap (11) on the union joint (13), liquid outlet (12) is sealed; The top of injection tube (1) is an opening, the barrel of described injection tube (1) is provided with evagination passage (14), be provided with in the injection tube (1) and injection tube (1) tube bonded upper piston of inner wall sealing (7) and lower piston (2), upper piston (7) places the opening part of injection tube (1), lower piston (2) places the below of upper piston (7) and is positioned on the evagination passage (14), upper and lower piston (7,2) will be separated out airtight upper chamber (6) and lower chamber (5) in the injection tube (1), the length (h) of lower piston (2) is less than the length (H) of evagination passage (14); Injection tube (1) top is arranged with an end cover (3), the endoporus of this end cover (3) is made up of bigger bottom hole in aperture (31) and aperture small upper screw (32), end cover (3) combines with injection tube (1) top by bottom hole (31), the bottom of described piston rod (4) is screw rod (41), top is less than or equal to the polished rod (43) of the screw thread path of screw rod (41) for its diameter, the lower end of piston rod (4) is connected by the top screw (32) of screw rod (41) with end cover (3), and being close to upper piston (7), the upper end of piston rod (4) extends to outside the opening of injection tube (1).
2, the pre-charge injector of the mixing injection medicines of band sealing cap according to claim 1, the drum outer wall that it is characterized in that described injection tube (1) top is provided with external screw thread (15), the bottom hole (31) of described end cover (3) is a screw, and end cover (3) and injection tube (1) are by being threaded.
3, the pre-charge injector of the mixing injection medicines of band sealing cap according to claim 1, the drum outer wall that it is characterized in that described injection tube (1) top is provided with outer rim boss (16), be provided with groove (311) with outer rim boss (16) corresponding position in the bottom hole (31) of described end cover (3), described end cover (3) is connected by outer rim boss (16) pressing that is pressed in the groove (311) with injection tube (1).
4,, it is characterized in that described evagination passage (14) or be one, or be uniformly distributed along the circumference two or three according to the pre-charge injector of the mixing injection medicines of claim 1 or 2 or 3 described band sealing caps.
5, the pre-charge injector of the mixing injection medicines of band sealing cap according to claim 4 is characterized in that the upper end of described piston rod (4) is provided with handle (42).
6, according to the pre-charge injector of the mixing injection medicines of claim 1 or 2 or 3 described band sealing caps, it is characterized in that described piston rod (4) adopts medical plastic to make, upper and lower piston (7,2) adopts medical grade rubber to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052974 CN2860496Y (en) | 2005-12-31 | 2005-12-31 | Pre-filled injector with sealed cap for mixed drug injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052974 CN2860496Y (en) | 2005-12-31 | 2005-12-31 | Pre-filled injector with sealed cap for mixed drug injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2860496Y true CN2860496Y (en) | 2007-01-24 |
Family
ID=37658124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520052974 Expired - Lifetime CN2860496Y (en) | 2005-12-31 | 2005-12-31 | Pre-filled injector with sealed cap for mixed drug injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2860496Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101796539A (en) * | 2007-07-03 | 2010-08-04 | 3M创新有限公司 | To the system and method for time-slot samples allocation contents bar with the effect of mensuration assigned content |
| CN107466239A (en) * | 2015-04-15 | 2017-12-12 | 汉高知识产权控股有限责任公司 | Mixed allocation apparatus and method for preparing and using the adhesive being made up of at least two components |
-
2005
- 2005-12-31 CN CN 200520052974 patent/CN2860496Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101796539A (en) * | 2007-07-03 | 2010-08-04 | 3M创新有限公司 | To the system and method for time-slot samples allocation contents bar with the effect of mensuration assigned content |
| CN107466239A (en) * | 2015-04-15 | 2017-12-12 | 汉高知识产权控股有限责任公司 | Mixed allocation apparatus and method for preparing and using the adhesive being made up of at least two components |
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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: 20070124 |
|
| EXPY | Termination of patent right or utility model |