CN1127663A - Disposable syringe with a retractable needle - Google Patents
Disposable syringe with a retractable needle Download PDFInfo
- Publication number
- CN1127663A CN1127663A CN 95101686 CN95101686A CN1127663A CN 1127663 A CN1127663 A CN 1127663A CN 95101686 CN95101686 CN 95101686 CN 95101686 A CN95101686 A CN 95101686A CN 1127663 A CN1127663 A CN 1127663A
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- CN
- China
- Prior art keywords
- mentioned
- syringe
- needle
- lug
- column base
- Prior art date
- 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.)
- Pending
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The disposable injector with a needle able to be drawn back is composed of a cylindrical body with an end part for connecting with the needle and another open end and a piston with a sealing pad in the cylindrical body, and features that said end part has a slot at internal side for connection with adjacent flange of stylobate connected to the needle and an external cover is attached to said end part for preventing the needle from ejecting out.
Description
The present invention is relevant with the structure that is provided with a regracting or recession syringe needle disposable syringe.
As everyone knows, in making disposable syringe one very important problem be might reuse the problem of said syringe and prevent that syringe needle can user of holding with needle applicator of accidental injury,
The means that address the above problem in the prior art provide the syringe that comprises elastic device usually so that syringe needle is withdrawn in the syringe.
Yet the syringe of these types except costing an arm and a leg, will be revised the shortcoming of syringe using method commonly used in addition, because when the nurse has an acupuncture treatment, in any case, syringe needle generally all will overcome an elastic counter-force.
Other links the connector of syringe body without the prior art handlebar syringe needle of elastic device, but this connector does not need to want the position that the locking of one needle safety is set at it, moreover structure is very complicated.
Therefore, disposable syringe structure by providing one to have a retractable needle is provided, this structure can make syringe needle drop back easily in the syringe body and need not use the recovery spring, simultaneously in its desired use location, can pin syringe needle safely.
In above-mentioned protection domain of the present invention, main purpose of the present invention provides a kind of like this disposable syringe structure, by adopting very simple and mechanically installing reliably, syringe needle is retracted in the syringe.
Another purpose of the present invention provides this disposable syringe structure of being made by unusual simple components, thereby just can obtain very big economic benefit.
Still a further object of the present invention provides this because its construction features event very reliable and safe disposable syringe structure in operation.
Problem according to an aspect of the present invention, above-mentioned goal of the invention and other purpose all can become more obvious hereinafter, reaching of the object of the invention is by being provided with the disposable syringe structure of a retractable needle, have a cylindrical body to limit one connects the extremity piece of syringe needle and is opening in its end, and receive a piston piece that is provided with plunger at the other end of cylindrical body side joint, it is characterized in that above-mentioned extremity piece is provided with the undercut slots that an adjacent posts that is used for linking to each other with above-mentioned syringe needle column base is meshed and an outer ring cover that can be added to by being enclosed within the part extremity piece on the above-mentioned extremity piece is set, and outwards penetrates to prevent above-mentioned column base and syringe needle.
Most preferred embodiment detailed description (though not being exclusivity embodiment) in conjunction with the accompanying drawings from hereinafter the disposable syringe structure that is provided with a retractable needle, present embodiment is used for just stating that explanation is not limited the present invention, by this description, further feature and advantage of the present invention can become more obvious, below:
Fig. 1 is the exploded pictorial profile that expression has the syringe cylindrical body that is connected in syringe needle on column base or the cylindrical member;
Fig. 2 is the top view of column base spare;
Fig. 3 shows the interior Connection Step of extremity piece that the above-mentioned column base spare that has syringe needle is connected in cylindrical body;
Fig. 4 shows the outer shroud cover is added on the extremity piece of syringe.
Fig. 5 explanation is attached to outer shroud cover spare by the distortion of material upset the cutaway view of the method on the syringe;
Fig. 6 is that syringe is in the cutaway view of preparing under the operating position;
The syringe of Fig. 7 representative when having an injection EO;
Operating procedure when the piston piece that Fig. 8 explanation links to each other with syringe needle is dropped back;
Fig. 9 shows the drop back cutaway view of magnification ratio in the syringe cylinder of syringe needle,
Figure 10 illustrates that operating procedure that piston is fractureed is in case the cutaway view that syringe is used again;
With reference to the label of above-mentioned accompanying drawing, according to the disposable syringe structure of a retractable needle of the present invention one cylinder that has an extremity piece that links to each other with syringe needle 21 that is located at the one end is arranged, above-mentioned pin is generally represented with label 3.
Generally the piston of representing with label 4 is engageable in cylinder 1, and above-mentioned piston is provided with a sealing gasket or rubber seal 5.
First main feature of the present invention be extremity piece 2 within it side be provided with a slot portion 10, this slot portion 10 when operation as the cylindrical portion of syringe needle 3 or the joggle piece of column base 11.
More particularly, this cylindrical portion or column base 11 within it the relative lug 12 and 13 of the elastic shrinkage that is provided with of end also comprise the adjacent flanges 14 that are engaged in the above-mentioned grooving 10 in case syringe needle is dropped back to cylinder 1.
And cylindrical portion or column base 11 be provided with a hex hole 15, and the tip 16 of syringe needle 3 is engaged in the hexagon ring 15 in well-known crimping mode.
By push hard column base 11 syringe needle 3 introduce be engaged in the grooving 10 with the adjacent flanges 14 that causes column base after, in order to reach firm connection, add an outer ring cover 20, more specifically say the end that is added to extremity piece 2, and push hard that thereby to provide label as shown in Figure 5 with overstriking at the material of extremity piece end be a narrow district of 21, it is used as a locking member and withdraws from from cylinder 1 to prevent syringe needle 3.
As shown in the figure, piston 4 is located at the end of the plunger 5 that has blind hole 30, thus comprise one be suitable for syringe needle 3 on the locking collar extension 31 of the lug 12 of column base 11 and 13 end meshing so that lug is shunk lug is linked in blind hole or the seat 30.Be located at one of lug for example the lock tooth spare on the lug 13 32 lock (see figure 5) with the interaction of locking collar extension 31.
So just make syringe needle 3 be rigidity at pistons end.
By adding a pulling force, because lug 12 and 13 shunk, thereby adjacent flanges 14 is thrown off also just disengagement of syringe needle 3 from grooving 10, makes syringe needle 3 (see figure 9) in the cylinder of syringe of dropping back.
The one single lug that has a locking member is set, and another lug in the time of like this when syringe needle 3 is dropped back cylinder 1 in, makes the syringe needle inclination several years as guide, generally about 5 °.
So syringe needle can not be reused this syringe with lateral displacement thereby syringe needle 3 can not further be dropped back.
And as shown in the figure, the bar 40 of piston 4 part therebetween is provided with notch 41, for a thrust is provided, by moving the end that comprises push button element 42, piston rod is fractureed easily.
Above-mentioned disclosed device, providing can not nonexpondable very practical syringe, in any case this usefulness very syringe that obtains of simple means is specially adapted to make syringe needle always to be securely fixed in its use location, and when piston was dropped back once more, syringe needle was just thrown off safely.
Disclosed invention has been easy to various modifications and variations, but all such modifications also all are included in the scope of the present invention's design.
Claims (7)
1. disposable syringe construction that has a retractable needle, it comprises a cylinder at its end qualification one extremity piece that links to each other with syringe needle, and in the other end of syringe be opening to hold a piston piece that has a plunger, it is characterized in that above-mentioned extremity piece is provided with a undercut slots that is used to mesh the adjacent flanges of the column base that links to each other with syringe needle, but also an outer ring cover is set, this outer ring cover is added on the above-mentioned extremity piece, by the above-mentioned extremity piece of thickened portion in case above-mentioned column base and syringe needle outwards penetrate.
2. disposable syringe according to claim 1, it is characterized in that above-mentioned column base is provided with an axial hole that is meshed with needle tip and above-mentioned column base also is provided with two lugs, toward each other and be suitable for elastic shrinkage, above-mentioned adjacent flanges is linked above-mentioned lug to provide and being connected of 90 ° of forms of above-mentioned undercut slots.
3. disposable syringe according to claim 1, but it is characterized in that above-mentioned profile cover is designed to overstriking towards needle tip part and the syringe material that links to each other with the axial end of above-mentioned column base, with the above-mentioned column base of clamping securely.
4. disposable syringe according to claim 1 is characterized in that above-mentioned piston in its end towards above-mentioned syringe needle, is provided with a blind hole by a locking collar extension locking, links but this locking collar extension and above-mentioned lug are demolition ground.
5. disposable syringe according to claim 1, it is characterized in that, one of above-mentioned lug is provided with a lock tooth spare that can link to each other with above-mentioned locking collar extension, and another lug is suitable for use as a guide, shrinks and above-mentioned lug is connected in the above-mentioned blind hole by making in the grooving adjacent flanges.
6. disposable syringe according to claim 1 is characterized in that, in the time of in above-mentioned syringe needle is dropped back above-mentioned cylinder, the locking tooth that is located on the single lug makes above-mentioned lug inclination further drop back to prevent above-mentioned syringe needle.
7. disposable syringe according to claim 1 is characterized in that, above-mentioned piston is at the mid portion of piston rod, is provided with to be suitable for making the groove of above-mentioned pistons end fracture to be used again to prevent syringe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101686 CN1127663A (en) | 1995-01-23 | 1995-01-23 | Disposable syringe with a retractable needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101686 CN1127663A (en) | 1995-01-23 | 1995-01-23 | Disposable syringe with a retractable needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1127663A true CN1127663A (en) | 1996-07-31 |
Family
ID=5074044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101686 Pending CN1127663A (en) | 1995-01-23 | 1995-01-23 | Disposable syringe with a retractable needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127663A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391554C (en) * | 2006-04-13 | 2008-06-04 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| CN102245237A (en) * | 2008-12-12 | 2011-11-16 | Shl集团有限责任公司 | Delivery member attachment device |
-
1995
- 1995-01-23 CN CN 95101686 patent/CN1127663A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391554C (en) * | 2006-04-13 | 2008-06-04 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| CN102245237A (en) * | 2008-12-12 | 2011-11-16 | Shl集团有限责任公司 | Delivery member attachment device |
| CN102245237B (en) * | 2008-12-12 | 2014-05-28 | Shl集团有限责任公司 | Delivery member attachment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |