CN1785447A - Self destroyed low resistance injector - Google Patents
Self destroyed low resistance injector Download PDFInfo
- Publication number
- CN1785447A CN1785447A CN 200510050757 CN200510050757A CN1785447A CN 1785447 A CN1785447 A CN 1785447A CN 200510050757 CN200510050757 CN 200510050757 CN 200510050757 A CN200510050757 A CN 200510050757A CN 1785447 A CN1785447 A CN 1785447A
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- China
- Prior art keywords
- piston
- low resistance
- cylindrical shell
- push rod
- injector
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A self-destroying low-resistance injector is characterized by that its piston is based on the rubber bowl principle of inflator and the contact between piston and injector tube is a line-surface contact, resulting in very low resistance and high sealing performance.
Description
Technical field the invention belongs to a kind of medical apparatus and instruments production technical field, is the upgraded product of ordinary syringe, especially for last fort of instead of glass syringe, and the special-purpose injection with low resistance of anesthetic puncture bag.
Technical background
At present at all available cheap and good-quality plastics disposable syringe instead of glass syringe in place (except that the surgery anesthesia bag) of the syringe that uses, and in operation in the special-purpose anesthesia packet, also without exception be to adopt old-fashioned glass syringe, reason is that the resistance of glass syringe is lower, be applicable to and only depend on negative pressure that human blood-pressure shrinks and self-priming injection, but its shortcoming is frangible in transportation and the handling process, in case fragmentation just causes whole anesthesia packet useless, and production cost is higher.
Patent ZL200420020258X discloses a kind of utility model technical scheme of injection with low resistance, and its shortcoming is the seal head complex structure, more than production mould at least 6 covers, so cause production cost also not low.And easily leak medicinal liquid, discharge opeing not only, the practicality of instead of glass syringe is not best.
The very big part of the sealing ring of general syringe is protruding garden shape with the contact surface of cylindrical shell inboard, and protruding top and inboard contact surface are bigger, are that face contacts with face, so resistance is also bigger.
Summary of the invention
The sealing that mainly provides a kind of inboard that can keep cylindrical shell (1) and piston (3) involved in the present invention, can keep their lower resistance simultaneously again, find a kind of sealing member product that just falls benefit to cooperate with cylindrical shell, and simple in structure again, easily production, low, the good popularization of cost.
In order to solve the technical problem underlying of the said goods, the present invention by the following technical solutions; Piston (3) is made positive and negative two-way leather cup shape structure, first road sealed outer ring (3-1) is towards the injection direction warp architecture, inner ring (3-2) is towards the back-flexing structure, two road sealing rings (3-3) have the back-flexing structure equally, sealing ring (3-1), (3-3) contact with the inboard formation of cylindrical shell (1) line-face, because contact surface is little, guaranteed lower resistance, again because piston adopts leather cup columnar structure, when coming to syringe internal liquid pressure, with the pressure size variation, sealing ring (3-1) pressurized and rise big or alleviate, increase sealing property, or in time reduced resistance again.Sealing ring (3-1) sealing is directly proportional with fluid pressure in the syringe, when the unexpected pressurized of syringe, because to sealing ring (3-2) also is same pressurized, sealing ring this moment (3-2) will increase in the bottom laterally tension to sealing ring (3-1) (figure four a), simultaneously again can collapsed seal circle (3-1) top contact shell portion, make it to reach balance, be subjected to tension to increase resistance too greatly and be unlikely to sealing ring (3-1) quickly, or reduce sealing property.
In order to solve the technical problem of product of the present invention, also can adopt following further technical scheme; (3-3) is designed to the inverted cup structure with piston packing, and when the syringe imbibition, sealing ring (3-3) plays sealing function, makes to produce negative pressure in the syringe and suck medicinal liquid.In order to reduce resistance, so be designed to inverted cup, sealing ring (3-3) contacts with the inboard formation of cylindrical shell (1) line-face, guarantees lower resistance and sealing property.
The present invention can not reuse in order to reach simple in structure again, has practicality, also can adopt following further technical scheme; Cylindrical shell (1) push rod (2) sealing ring (3) all is designed to a mold forming, just can produce with three cover production moulds, and can be by common disposable syringe device fabrication, in order to reach disposable use, in the design of pin post bolt root frangible means (4) structure is arranged, make the medical worker need only a folding gently, just, drop separation from the root fracture with the back.Perhaps set up frangible means (5) structure, the medical worker needed only gently once rolling over two places of push rod can being ruptured with the back, can not reuse again at push rod (2) middle part,
Accompanying drawing
Figure one; The self destroyed low resistance injector organigram
Figure three; Self destroyed low resistance injector push rod sectional view
Figure two; Self destroyed low resistance injector piston front sketch map
Figure four; The stressed contrast sketch map of conventional seals circle and sealing ring of the present invention
The concrete side of implementing
The concrete side 1 of implementing is with reference to figure one; When being used in surgery anesthesia, at first the suction sealing by sealing ring (3-3) makes cylindrical shell produce negative pressure, and medicinal liquid is sucked from syringe needle, then drains air.The interior medicinal liquid body of syringe this moment is to lean on the negative pressure of human blood-pressure with the very long suction of medicinal liquid, push rod this moment (2) is in the negative pressure suction condition, sealing ring (3-1) is in all the time to rise and opens and less contact surface and energy sealing state, so this moment, resistance was lower, burden to the person is lighter, can shrink by personal blood pressure to suck or lean on artificial extremely light thrust that medicinal liquid is pushed human body medicinal liquid.Reached the effect of injection with low resistance.
Specific embodiment 2 is with reference to figure one; (the same example sucks medicinal liquid) hand acts on the not end of push rod (2) when being used for general manual injection, medicinal liquid produces bidirection press, the one, towards the counteracting force of piston with towards the injecting liquid drug power of syringe needle, when counteracting force can not pass through sealing ring (3-1), medicinal liquid just injects human body with injection force, when manually strengthening active force suddenly, sealing ring (3-2) will increase laterally tension to sealing ring (3-1) in the bottom, and (figure four a), can contact shell portion in collapsed seal circle (3-1) top again simultaneously, the active force of sealing ring (3-2) can keep in a basic balance with medicinal liquid pressure is overall, so when strengthening hand pressure, sealing ring (3-1) is leaked, when Manual pressure hour, then medicinal liquid is also less to the pressure of sealing ring (3-1), so also can not cause leakage.So no matter which kind of situation under, use this syringe all can not cause liquid leakage.Again because piston and cylindrical shell have less contact surface, so can keep less resistance.
Specific embodiment 3 is with reference to figure four; When pressing the injection of figure four (a) product of the present invention, the contact surface of (7) is that line simultaneously contacts, and stiction is less, and when by the injection of this figure four (b) ordinary syringe, the contact surface of (8) is that face simultaneously contacts, and what contact surface was big relatively, resistance is big is many.So main structural member piston of the present invention---be that traditional piston is had significant improvement and creation.
Claims (6)
1 self destroyed low resistance injector; The piston (3) that comprises outer injectors cylindrical shell (1) and inner push rod (2) and be enclosed within on push rod (2) top is formed, and it is characterized in that; Described syringe piston (3) is extremely low with cylindrical shell (1) inwall maintenance sealing and resistance.
2 as claim 1 described self destroyed low resistance injector, it is characterized in that; Described piston (3) and cylindrical shell (1) inner seal will reach the syringe standard, but that the resistance during its push rod (2) free falling reaches is lower (be no more than 60 grams, reach or near the resistance of glass syringe).
3 as claim 1 described self destroyed low resistance injector, it is characterized in that; Described piston (3) has special forward leather cup (3-1) structure, inverted cup (3-2) structure, and one-way sealing leather cup (3-3) structure combines the inboard formation of piston (3) and cylindrical shell (1) line-face, causes lower resistance and sealing is arranged again.
4 as claim 1 described self destroyed low resistance injector, it is characterized in that; Describedly be provided with (or can not establish) frangible means (4), make easily syringe needle to be fractureed from root after using up, reach the purpose of disposable use self-destruction at syringe needle post bolt root.
5 as claim 1 described self destroyed low resistance injector, it is characterized in that; Push rod (2) is provided with (or can not establish) frangible means (5) at the middle part, can easily push rod (2) be fractureed after feasible the using up, and reaches the purpose of disposable use self-destruction.
6 as claim 1 described self destroyed low resistance injector, it is characterized in that; There is flange (6) cylindrical shell (1) porch, makes push rod (2) and piston (3) in use be difficult for pulling out outside the cylindrical shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510050757 CN1785447B (en) | 2005-07-18 | 2005-07-18 | Self destroyed low resistance injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510050757 CN1785447B (en) | 2005-07-18 | 2005-07-18 | Self destroyed low resistance injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1785447A true CN1785447A (en) | 2006-06-14 |
| CN1785447B CN1785447B (en) | 2011-08-03 |
Family
ID=36783116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510050757 Expired - Fee Related CN1785447B (en) | 2005-07-18 | 2005-07-18 | Self destroyed low resistance injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1785447B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107002A (en) * | 2018-09-07 | 2019-01-01 | 浙江润强医疗器械股份有限公司 | Disposable injection with low resistance |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505108Y (en) * | 2001-07-25 | 2002-08-14 | 李赛玲 | Syringe with destructor |
| CN2640496Y (en) * | 2003-07-07 | 2004-09-15 | 应相云 | Improved self-destroying syringe |
| CN2684845Y (en) * | 2004-02-16 | 2005-03-16 | 余利荣 | Disposable low-resistance injector |
| CN2698372Y (en) * | 2004-04-15 | 2005-05-11 | 余利荣 | Double self-destructing injection syringe |
-
2005
- 2005-07-18 CN CN 200510050757 patent/CN1785447B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107002A (en) * | 2018-09-07 | 2019-01-01 | 浙江润强医疗器械股份有限公司 | Disposable injection with low resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1785447B (en) | 2011-08-03 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20140718 |
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| EXPY | Termination of patent right or utility model |