CN1206351A - Retractable needle and syringe combination - Google Patents
Retractable needle and syringe combination Download PDFInfo
- Publication number
- CN1206351A CN1206351A CN 97191501 CN97191501A CN1206351A CN 1206351 A CN1206351 A CN 1206351A CN 97191501 CN97191501 CN 97191501 CN 97191501 A CN97191501 A CN 97191501A CN 1206351 A CN1206351 A CN 1206351A
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- China
- Prior art keywords
- syringe
- needle
- pipe
- outer tube
- sleeve
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Abstract
A combination device of syringe (20) and needle are disclosed wherein the needle is mounted to a retractable element which retracts into the body of the syringe plunger. The needle (12) is mounted to the retractor (30) which is spring biased (68) to retract the needle. The retraction is actuated by releasing the forward end of the retractor from engagement with a collet positioned on the forward end of the syringe inner barrel (60). The collet (66) is configured so as to clamp the forward end of the retractor, and only releases the forward end when the collet is pushed forwardly, expanded, and disengages the forward end of the needle retractor.
Description
The present invention relates to comprise the medical treatment device of syringe needle, this device can prevent in use that syringe needle from stabbing the medical work personnel.More particularly, the present invention relates to a kind of composite set, it comprises a retractable needle and syringe, and this syringe can be automatically with in the syringe needle retract syringes body in the whole stroke of syringe piston pipe, thereby prevents the probability that syringe needle is hurted sb.'s feelings.
Owing to make transmission of disease by blood, syringe needle is stabbed and is considered to that healthy and medical worker are had very big danger.Therefore, a lot of devices have been proposed, to eliminate or to reduce this danger.These devices in theory all can be produced, but for the viewpoint of reality, and many devices are not to be suitable for producing in batches and/or the production of economical rationality.The problem relevant with existing apparatus comprises that mainly the technology of employing and technology are too complicated, molding tolerance for example, and these technologies and technology are not suitable in batches and/or the production of economical rationality.
The example of the prior art that addresses this problem has much in the art.United States Patent (USP) 5,324,265 is exactly an example of prior art, and this device has adopted many independent sealing members and has overcome sealing so that the acting force of the spring of syringe needle withdrawal piston tube middle body.This device also uses a kind of special needle component and the preceding pipe close that is arranged at the syringe outer surface.
United States Patent (USP) 5,385,551 disclose a kind of syringe, comprise a retractable needle, and this syringe needle is arranged on the piston tube front end on the removable pipe close.Pipe close can move under the effect of spring, to realize in the syringe needle retraction piston body.This device needs several special parts to operate, and comprises a special needle component.
United States Patent (USP) 5,389,076 also discloses the composite set of a kind of syringe and contractible needle component.Sealing ring was along the moving of the length direction of needle holder, so that needle holder is thrown off in the retraction piston body backward before this device was fixed against.This device also needs a special needle holder.
United States Patent (USP) 5,395,337 disclose the composite set of a kind of syringe and syringe needle, the structural similarity of it and above-mentioned United States Patent (USP) 5,324,265, promptly this device relies on the active force of spring to overcome hermetic resistance and with in the syringe needle retraction piston body.This device needs to use, assemble many special parts.
United States Patent (USP) 5,407,431 also disclose a kind of retractable needle and injection device (being a drain Intubaction device) in this patent.This device relies on the expandable washer around needle holder, expands by the reach of piston tube front end, and this device also uses one to be pressed in the forward spring of syringe needle and to enter in the piston tube with the pushing tow syringe needle.This device also needs to use and assembles many special parts.
United States Patent (USP) 5,407,436 disclose the composite set of a kind of retractable needle and syringe, the forward thrust that its relies on piston tube by spring active force and needle holder on throw off, and send into backward in the piston body.The active force of spring must overcome the sealing of piston tube middle body and promote syringe needle backward.
The composite set of many existing syringes and retractable needle proposes at piston tube front end manual withdrawal syringe needle, thereby makes the piston tube withdrawal and syringe needle is drawn in the syringe body.The composite set of these double-acting syringes and syringe needle is not widely used.Its reason may be owing to for eliminating the danger of needle sting, need bimanualness at the part user.Second manual step needs a people to catch the shell body of syringe, and overcomes some resistance retracting needles.This withdrawal may cause the slippage of part user and make syringe needle cause the user inconvenience.Such technology generally by by Congress promulgation be intended to prevent that the federal security legislation of needle sting accident from forbidding.
An object of the present invention is to simplify required structure with the retractable needle that a kind of hands one step operation is set and the composite set of syringe.The present invention wants the traditional device of utilizing of maximum possible.In addition, user needn't learn to exceed any rule of operation outside traditional syringe and the syringe needle composite set.
The present invention's the retractable needle and the composite set of syringe need the prolongation of piston tube stroke, so that needle retraction device is thrown off from preposition expansion sleeve.This sleeve just expands and discharges syringe needle retracting device by the spring bias voltage to enter in the syringe body.
The syringe needle that is used for bigger syringe is a traditional syringe needle, and this syringe needle outer surface is connected with a screw connection.This syringe comprise in one pipe and have telescopic before sealed end, sleeve is loaded in the syringe outer tube with a spring.Next, syringe needle retracting device and spring are loaded into syringe, in the syringe of then piston tube being packed into, finish assembling.One has two springs, and three sealing members and four molded parts of plastics have been formed the special part of this device.The surplus part of the difference of general part, i.e. needle cap, the packing of syringe all is traditional popular design of not changing.
By simplifying parts and simplifying using method, the present invention's the retractable needle and the composite set of syringe not only are easy to use, economical production, and be suitable for a large amount of uses.Owing to have these reality, thus the present invention can be widely used, even and can not eliminate the transmission of disease of needle sting fully, but can significantly reduce the transmission of disease of needle sting at least.
Fig. 1 is a partial, partially-cross-sectioned side-elevation view of the syringe according to the present invention;
Fig. 2 is a partial, partially-cross-sectioned side-elevation view of the syringe according to the present invention, has showed the piston tube that is in the forward position, but also shows the fixed syringe needle of screw thread according to the present invention;
Fig. 3 for according to the present invention part cut open side view in the office of the combination of the syringe of retracted position and syringe needle;
Fig. 4 is the parts decomposition view of the syringe according to the present invention, shows the order of each part of assembling;
Fig. 5 is the amplification partial sectional view of end before the syringe that has assembled according to the present invention;
Fig. 6 is the plan view of needle retraction device of the present invention;
Fig. 7 is the cutaway view of needle retraction device shown in Figure 6;
Fig. 8 is the end-view that is used for expansion sleeve of the present invention;
Fig. 9 is along the sectional elevation that cuts open timberline A-A shown in Figure 8;
Figure 10 shows the another kind of sealing device of needle retraction device, and wherein the O-ring seals sealing member that is fixed substitutes.
With reference to the accompanying drawing that constitutes this description part, the present invention is described as follows.Shown in Fig. 1-5, the present invention is the composite set of syringe 20 and syringe needle 10.In the big embodiment of this device, promptly under the situation of syringe greater than 10cc, syringe needle is attachable individually parts, and these parts comprise the metal part 12 and the part 14 that is threaded.For less syringe, for example home-use device, syringe needle is fixedly connected on the syringe.These parts can utilize the needle component on the conventional syringe, and this syringe has the lock portion that protrudes into.Injection device 20 of the present invention comprises the interior pipe 60 of a hollow, and it matches with syringe needle retracting device 30, thereby can be with in the pipe in syringe needle 10 retractions after use.The action of the retraction of syringe needle can be by prolonging the stroke of syringe piston pipe 40, finishes in the body along with the emptying of piston tube pipe in the syringe needle retracting device is thrown off from sleeve 66 and by spring action it pushed.
Syringe 20 is made up of outer tube 50 and interior pipe 60.Interior pipe has a front end 64, and this front end has an additional potted component 62, is O shape circle in the present embodiment, and pipe sealed isolated with the inner surface of outer tube 50 mutually in it made.This has just produced a fluid control chamber, and by the rear end importing control chamber of piston tube 40 from syringe made it to be compressed.Piston tube has the annular piston tube end 44 that a tubular bodies 40 and is positioned at the piston tube rear end.In the rear end of piston tube a pushing member 46 can be set, thereby combine with the thumb of user.
The front end 64 of interior pipe 60 also comprises a sleeve 66, comprises groove 67 on this sleeve 66.Sleeve 66 has the infundibulate outer surface of a trough of belt, and when its opening by the front end of outer tube 50 was withdrawn, this funnel shaped can produce an effect of shrinking and clamping to sleeve.Short spring 68 is offset to sleeve and clamps or retracted position, and pipe 60 moved backward relative to outer tube 50 in its short-and-medium spring 68 made.
This device also comprises a retracted needle seat 30, shown in Fig. 6 and 7.This needle holder 30 is suitable for being inserted into from its rear end by the body of interior pipe 60.Needle holder 30 comprises a main part 32 and fluid outlet 36, and wherein main part 32 has an end cap 34 in its back-end, and outlet 36 is provided with and extends to its front end along the intermediate cross-section of needle holder.The fluid issuing 65 through interior pipe 60 enters syringe needle 10 by needle holder fluid issuing 36 from the control room to make the liquid that is pressurizeed by piston tube 40 by retracted needle seat 30.Needle holder by two sealing members 33 and 35 with interior pipe 60 within the face seal isolation.In first embodiment shown in Fig. 1-7, sealing member 33 and 35 is an O-ring seals.They are called as dynamic sealing.Another embodiment of sealing device between needle holder 30 and interior pipe 60 as shown in figure 10, wherein fixed annular pressure sealing member is used within the outside annular boundary face of needle holder 30 and the interior pipe 60 between the annular diametric(al) boundary.
The details of the sleeve 66 of present embodiment is shown in Fig. 8 and 9.Sleeve comprises groove 67, when telescopic infundibulate outer surface by the open front in the outer tube 50 of syringe 20 forward or backward during pushing tow, this groove can allow sleeve expansion and contraction.When sleeve 66 by short springs 68 relative outer tubes 50 backward during pushing tow, barrel forward end reduced, and being clipped on the outer surface of needle holder 30.The assistance of the side 31 that the clamping of this needle holder and maintenance obtain caving in, this depression side 31 is arranged on the outer surface of needle holder 30.Sleeve 66 just is clipped on the needle holder after the side of depression.The side 31 of depression is illustrated as a ring-type element in the present embodiment, and it can adopt and can combine and keep needle holder 30 to be in the Any shape of interior pipe 60 front ends with the restriction side of sleeve 66.
Assemble sequence of the present invention as shown in Figure 4.At first assemble piston tube 40 and front end 44 thereof.Then, in needle holder 30 and corresponding long spring 38, sealing member 33 and 35 insert in the pipe 60, manage 60 in wherein and form by a front end 64 and sealing member 62, sleeve 66.Interior pipe and short spring 68 are arranged in the outer tube 50, next the needle holder 30 that installs are inserted.Directly be inserted into the piston tube that to have installed and sleeve when fastening, just the piston tube that installs inserted.Whole syringe comprises four molded thermoplastic polymer parts, i.e. piston tube, outer tube and interior pipe, needle holder, three sealing members and two springs.Sealing member also can be a polymer and mold formed with pipe and needle holder in required each respectively.By the few relatively number of parts and the simplification of enforcement, the composite set of syringe of the present invention and retractable needle can be produced easily and economically.
Above-mentioned part only is some explanations of best-of-breed functionality of the present invention and most preferred embodiment.Also can make other distortion but the protection domain that do not break away from the present invention who limits by appended claims to the present invention.
Claims (11)
1. syringe comprises:
One outer tube part has a front end and a rear end;
Pipe in one, be suitable for inserting the rear end of said outer tube, pipe has an expandable sleeve that is fixed in its front end in said, with a tubular bodies of aliging with said sleeve, said sleeve has a rear end, the opening that is suitable on the front end with said outer tube is connected, when said sleeve is pushed rearward when moving by said opening, said opening can make said sleeve shrink, pipe and said outer tube seal isolation in said are to hold fluid in the fluid control chamber between the inner surface of the outer surface of said tubular bodies and said outer tube;
Spring assembly, it is arranged between said outer tube and the interior pipe, so that pipe moves backward relative to said outer tube in said;
One needle retractable element, it has a tubular bodies and and is arranged at its interior fluid issuing, this needle retractable element insert said in the said tubular bodies of pipe and by the clamping of said expandable sleeve phase, said fluid issuing be formed at said outer tube and said interior pipe between fluid control chamber UNICOM;
Second spring assembly, it is used for backward moving said needle retraction device, this spring in said, manage and said needle retraction device between;
One piston tube element, be suitable for inserting said control chamber, this chamber is used for compressed container in wherein fluid and impel said fluid by said fluid issuing, thereby with the wish of user, said in the reach of the said relatively outer tube of pipe can discharge said needle retractable element and backward retraction said in the pipe.
2. according to the syringe of claim 1, also comprise:
One syringe needle is connected to the front end of said needle retractable element.
3. according to the syringe of claim 2, also comprise:
Screw connection is used for said syringe needle is connected to the front end of said needle retraction device.
4. according to the syringe of claim 1, it is characterized in that: said spring assembly comprises a helical spring.
5. according to the syringe of claim 1, it is characterized in that: said second spring assembly comprises a helical spring.
6. according to the syringe of claim 1, also comprise: the first independent sealing device, be used to make said outer tube part and said in the seal of tube isolate.
7. according to the syringe of claim 6, it is characterized in that: the said first independent sealing device comprises an O-ring seals.
8. according to the syringe of claim 1, also comprise:
The second and the 3rd independent sealing device is used for the said needle retraction device and the said interior seal of tube are isolated.
9. syringe according to Claim 8, it is characterized in that: the said second and the 3rd independent sealing device comprises an O-ring seals.
10. syringe according to Claim 8, it is characterized in that: the said second and the 3rd independent sealing device comprises annular fixing seals.
11. the syringe according to claim 1 is characterized in that: said expandable sleeve has a funnel shaped outer surface and comprises the groove that is positioned on its side, can expand and shrink so that be positioned at the vertical passage of said sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97191501 CN1206351A (en) | 1996-10-29 | 1997-10-17 | Retractable needle and syringe combination |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/739,282 | 1996-10-29 | ||
| CN 97191501 CN1206351A (en) | 1996-10-29 | 1997-10-17 | Retractable needle and syringe combination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1206351A true CN1206351A (en) | 1999-01-27 |
Family
ID=5178994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97191501 Pending CN1206351A (en) | 1996-10-29 | 1997-10-17 | Retractable needle and syringe combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206351A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203258B (en) * | 2005-05-12 | 2011-01-19 | 尤尼特拉克特注射器公司 | Improved controlled retraction syringe and plunger therefor |
| CN110325233A (en) * | 2016-11-01 | 2019-10-11 | 科利登医疗系统公司 | Safety injector |
-
1997
- 1997-10-17 CN CN 97191501 patent/CN1206351A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203258B (en) * | 2005-05-12 | 2011-01-19 | 尤尼特拉克特注射器公司 | Improved controlled retraction syringe and plunger therefor |
| CN110325233A (en) * | 2016-11-01 | 2019-10-11 | 科利登医疗系统公司 | Safety injector |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |