CN100479876C - Syringe spring retainer - Google Patents
Syringe spring retainer Download PDFInfo
- Publication number
- CN100479876C CN100479876C CNB2004800075958A CN200480007595A CN100479876C CN 100479876 C CN100479876 C CN 100479876C CN B2004800075958 A CNB2004800075958 A CN B2004800075958A CN 200480007595 A CN200480007595 A CN 200480007595A CN 100479876 C CN100479876 C CN 100479876C
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- CN
- China
- Prior art keywords
- body member
- plunger
- syringe
- spring
- spring 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.)
- Expired - Fee Related
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Abstract
A spring retainer (60) for a syringe (10) that has a barrel (40), a plunger (20), a spring (90) and a retractable needle (50) that can couple with the plunger for spring-driven retraction of the coupled needle and plunger. The spring retainer has first (70) and second (80) body members that cooperate to releasably maintain the spring in a compressed state until the plunger is coupled to the retractable needle after depression of the plunger to deliver the fluid contents of the syringe. Depression of the plunger triggers rotational disengagement of the first and second body members to allow decompression of the spring which forces retraction of the needle into the barrel. Rotational disengagement of the first and second body members also assists rotation of the plunger into a final, inoperable position.
Description
Technical field
The present invention relates to a kind of spring base that is used for syringe.Particularly, the present invention relates to a kind ofly be convenient to prevent that syringe and/or the reusable single of syringe needle from using, the spring base of retractable syringe.
Background technology
The problem that has shared syringe as everyone knows.Shared between the patient who uses continuously do not have the problem of abundant germ-resistant syringe mainly can cause the propagation of HIV and the hepatitis serious recurrence afterwards of having recovered, and social those patients are helped and expensive that medical treatment keeps be provided.
The minority relevant with syringe with unholiness syringe needle but the situation that has a risk are by causing because of neglecting the injured incident of contingent shank.This becomes problem especially for law-executor and the medical personnel that those often contact with the illegal drug user in their vocational activity.In addition, the illegal drug user also is dangerous side-product as the custom that abandons syringe, and syringe often is discarded in the place that can touch the risky public of the movable person in some zones, as park and school playground.
International Application No. WO 01/80930 has been described a kind of single and has been used retractable syringe, thereby it is by guaranteeing plunger and all descend and making syringe needle forever recall the repeated use that prevents syringe effectively under the injection tube effect by guaranteeing to turn back at plunger in the liquid transport process.Specifically, as International Application No. WO 01/80930, the retractable syringe of describing in Australian Patent 731159 and the United States Patent (USP) 6,083,199 has adopted a spring so that syringe needle withdrawal and prevent the repeated use of syringe thus.
But, in plunger decline process, can bring bad " sensation " for the user of some syringes such as the resistance of intravenous anesthesia person's spring.
Summary of the invention
Therefore, the present invention mainly provides a kind of spring base that is used for syringe, and it can make used syringe needle be withdrawn into effectively in the injection tube of retractable syringe, and has also improved the sense of touch protection to the syringe user simultaneously.
On the one hand, the invention provides a kind of spring base that is used for syringe, described syringe comprises injection tube, plunger, spring and retractable needle, and described spring base is suitable for releasedly described spring being maintained compressive state and reduces pressure so that described retractable needle is withdrawn in the described injection tube up to the needs spring.
On the other hand, the invention provides a kind of syringe, it comprises injection tube, plunger, spring base and spring, a kind of retractable needle can be installed on this syringe and be used for described syringe needle is withdrawn in the described injection tube in conjunction with described plunger with activation, described spring base is suitable for described spring is maintained a kind of compressive state releasedly up to the described spring decompression of needs, is withdrawn in the described injection tube thereby help described retractable needle.
Correspondingly be that described syringe is fit to make above retractable needle is installed in.
In a preferred embodiment, described syringe is a kind of retractable syringe, it has a retractable needle, in the use, described spring is compressed in the described seat up to finishing or near the decline of finishing described plunger so that from described syringe injection material, and the decompression of described syringe afterwards is convenient to retractable needle and is recalled in the injection tube.
In a preferred embodiment, described spring base has a housing, and it comprises first body member and second body member, and they mesh releasedly to keep described spring in a kind of initial compressed state.
According to this embodiment, the disengagement of described first body member and second body member allows or is convenient to the decompression of described spring.
Preferably, described plunger comprises and is used to mesh described housing to trigger, to cause and impel first body member and second body member to begin the device that meshes or begin on the contrary to throw off.
These devices can be one or more shoulder, boss, flange or other outthrust, and they can mesh one or more corresponding complementary compatible portion of described housing.
Correspondingly be, one or more respective complementary compatible portion of described housing can be inclined-plane, groove, recess, groove etc., they can be by the engagement of described plunger assembly with the described housing of engagement in the use.
Preferably, the disengagement of first body member and second body member is accompanied by the rotation of second body member with respect to first body member.When described retractable needle combined with them, this rotation helped plunger to rotate to final inoperable position successively.
Unless outside entire description specialized, " comprising " " comprised " etc. that being used for expression is included rather than get rid of, thus the whole or whole group of a setting can comprise one or more other not have integral body or the whole group set.
Description of drawings
The present invention will be referenced preferred embodiments and drawings and be described.Among the figure:
Fig. 1 is the cutaway view that the regracting single uses syringe;
Fig. 2 is the side view that is installed to first the embodiment of retractable needles on the injection tube;
Fig. 3 A and Fig. 3 B are mounted in the cutaway view of the spring base on the syringe respectively;
Fig. 4 A and Fig. 4 B are respectively the decomposition diagrams of plunger and spring base housing first body member;
Fig. 5 is the decomposition diagram of spring base, spring and plunger;
Fig. 6 is the decomposition diagram of spring base and plunger;
Fig. 7 is first body member of spring base and the decomposition diagram that second body member is thrown off.
The specific embodiment
Be appreciated that, partly comprise International Application No. WO 01/80930, Australian Patent 731159 and United States Patent (USP) 6 among the embodiment of single use retractable syringe 10 described herein, those elements of describing at first in 083,199, above-mentioned patent all is incorporated herein by reference.
With reference to Fig. 1 and 2, syringe 10 has plunger 20, injection tube 40, retractable needle 50 and spring base 60.Spring base 60 is arranged in the flared end 41 of injection tube 40, and it comprises first body member 70 and second body member 80, and their cooperations to be holding spring 90, and it is kept initial compressed state shown in Figure 1.Syringe 10 also comprises the sealing member 11 that places on the plunger 20, and it can prevent that liquid from leaking between the inwall 42 of plunger 20 and injection tube 40.
Specifically with reference to Fig. 2, described a preferred embodiment among the figure, wherein retractable needle 50 can be assembled on the needle end 44 of injection tube 40 by a dish 100.Described dish has annular groove 101, and it cooperates with ring rib 46 on the inwall 42 of injection tube 40.On the ring-shaped step 48 that O sealing shape ring 47 places in the barrel wall 42.The body 53 of retractable needle 50 has elbows 54A, 54B, and they are kept by the annular shoulder 104 of dish 100, up to retractable needle 50 withdrawals.
Note that also that according to this embodiment each barbed arms 52A, 52B comprise the first barb 55A, 55B and the second barb 56A, 56B.If second barb can not suitably mesh corresponding barb engaging hole 22, the first barb 55A, 55B a kind of release mechanism is provided, so that the withdrawal of retractable needle 50.Just, if the second barb 56A, 56B suitably do not mesh corresponding barb engaging hole 22, the then engageable barb engaging hole 22 of the first barb 55A, 55B.
In an alternate embodiment, retractable needle can be provided with as described in 199 as Australian Patent 731159 and United States Patent (USP) 6,083.
See that as best in Fig. 3 A and 3B plunger 20 also comprises plunger rod 32 and the exercisable button 35 of user with shoulder 33A, 33B.Described shoulder has surperficial 34A, the 34B of inclination respectively.
Understand the operation of plunger 20 below by reference Fig. 4 A and Fig. 4 B, specifically be about the rotation of plunger 20 and have the aligning of the syringe needle geared assembly 23 of retractable needle barb 52A, 52B, so that obtain the withdrawal of syringe needle 50.
In Fig. 4 A and Fig. 4 B, also show first body member 70 of spring base 60, it comprises shell body 71, back-up ring 72 and first finger piece or outthrust 73A and second finger piece or outthrust 73B with first plunger hole 74, described first plunger hole 74 holds plunger 20, the first finger pieces slidably or outthrust 73A is directed so that vertically relative each other with second finger piece or outthrust 73B.First body member 70 also comprises corresponding boss 75A, the 75B of body 71 inside.
In the use, first finger piece or outthrust 73A and second finger piece or outthrust 73B mesh corresponding groove 24,25,26 or 27, shown in Fig. 4 A or Fig. 4 B.
In an alternate embodiment, outthrust 73A, 73B can be globular or be approximately spherical, thereby reposefully, be meshed with the groove that can be received this knob by suitable formation slidably.
Referring now to Fig. 5,, spring base 60 comprises first body member 70 and second body member 80, and when they were assembled together, they can be cooperated so that spring 90 is maintained initial compressed state releasedly.
When assembling spring base 60, under the situation that boss 75A, 75B do not throw off from scallop section 87A, 87B, can limit second body member 80 and move against the vertical or withdrawal of compression spring 90 effects, and second body member is thrown off from first body member with respect to first body member 70.
Usually, this move is limited in 0.1 to 1.0mm, and preferably about 0.2 to 08mm, that more excellent is 0.5mm, but it can be according to syringe, the length of plunger and/or spring and/or capacity and change easily.
Engagement between boss 75A, 75B and scallop section 87A, the 87B is limited in the rotation of second body member 80 with respect to first body member 70 in the scope that is no more than 5 °.
Rotation for plunger 20 in the withdrawal process of syringe filling, injection and syringe needle 50 can be understood better with reference to Fig. 4 A and 4B, also can be with reference to International Application No. WO 01/80930.
In the use, begin the first outthrust 73A and place in first groove 24, and the second outthrust 73B places in the withdrawal groove 26.
Along with the withdrawal of plunger 20, the first outthrust 73A from first groove 24 move into second groove 25 slidably through first deflector 28 and the second outthrust 73B from the withdrawal groove 26 move into the 4th groove 27 slidably through the 3rd deflector 30.Can cause plunger 20 that one 90 ° rotation is arranged with respect to injection tube 40 like this.
In the withdrawal process of plunger 20, shoulder 33A, 33B are freely to slide through shoulder recess 83A, the 83B in second body member 80.
In the first outthrust 73A places second groove 25 slidably and the second outthrust 73B when placing the 4th groove 27 slidably, plunger 20 descends so that from injection tube 40 injection or emptying materials.
Thus, at this moment the barb engaging hole 22 of plunger 20 be aligned so that with barb arm 52A, the 52B of retractable needle 50 engagement.
In the decline process, spring 90 is keeping the state of compression by spring base 60 and only can occur the decompression phenomenon of spring 90 towards the decline end of plunger 20.
The original state that second body member 80 is thrown off from first body member 70 is shown in Figure 6.Inclined surface 34A, the 34B of shoulder 33A, the 33B of plunger 20 mesh corresponding shoulder slope 82A, 82B to vertically move second body member 80 so that further to compress spring 90 among the figure.It is accompanied by barb engaging hole 22 and meshes barb 52A, the 52B of retractable needle 50 respectively so that plunger 20 is attached on the retractable needle 50.
The inclined surface 34A, the 34B that it is noted that each shoulder 33A, 33B of plunger 20 guarantee when plunger 20 drops to terminal, only mesh shoulder slope 82A, the 82B of second body member 80 at the eleventh hour.
Because the first outthrust 73A meshes the 4th groove 27 of second groove 25 and second outthrust 73B engagement plunger 20, plunger 20 self can not rotate.Linearity by plunger 20 moves driving second body member 80 vertically moving with respect to first body member 70.The power that user affacts on the plunger 20 in plunger decline process is delivered to second body member 80 by inclined surface 34A, the 34B of each shoulder 33A, 33B and the engagement between shoulder slope 82A, the 82B in second body member 80.This power makes second body member 80 with respect to first body member 70 (it can not rotate) rotation, enough to discharge the engagement of corresponding boss 75A, 75B and scallop section 87A, 87B.This release causes the disengagement of second body member 80 from first body member 70, allows spring 90 decompressions thus, and its boss 75A, 75B that impels circumferential slope 85A, the 85B of second body member 80 supporting first body member 70 (it can not rotate) successively slides.Thus, impel when second body member 80 is thrown off first body member 70 it with respect to 70 rotations of first body member.By second body member 80 that shoulder 33A, 33B to plunger 20 support, this power is passed on the plunger 20, impels the rotation and the withdrawal of plunger 20 and retractable needle 50 thus.
Rotate to last 90 when spending at plunger 20, the first outthrust 73A moves into withdrawal grooves 26 through second deflector 29, and the second outthrust 73B moves into second groove 24 from the 4th groove 27 through quadrupole deflector portion 31.
At this moment, being withdrawn into the bonded retractable needle 50 of mode described in the International Application No. WO 01/80930 and plunger 20 finally can not operated position.Thus, outthrust 73B, 73A mesh binding site 21B in first groove 24 and the binding site 21D in the withdrawal groove 26 respectively to prevent retractable needle 50 is withdrawn into injection tube 40 in the decline of plunger 20 afterwards or further to recall.
In an embodiment shown in Fig. 7, when second main component 80 began from 70 disengagements of first main component, because the driving of relief spring 90, second main component 80 moved axially with plunger 20.Therefore, second body member 80 moves axially up to circumferential ramps 85A, 85B and is meshed by boss 75A, 75B in first body member 70 respectively, impel second body member 80 on the direction shown in the arrow, to rotate thus, successively, the engagement rotary plunger 20 between shoulder inclined-plane 82A, the 82B of shoulder 33A, the 33B of dependence plunger 20 and second body member 80.
Aim at second deflector 29 and the quadrupole deflector portion 31 respectively by outthrust 73A, 73B with first body member 70, the rotation of the plunger 20 that causes in conjunction with rotation by second body member 80, under the assistance of the rotation of second body member 80, described thus plunger 20 rotates into aforementioned final, inoperable position.
Like this plunger 20 can not fully be rotated and block probability that plunger 20 is moved further and drop to minimumly, retractable needle 50 is partly withdrawn.
Also obvious, the embodiment of second body member 80 shown in Fig. 7 has the cervical region 88 of extension, and wherein, shoulder inclined- plane 82A, 82B are than the inside of a bit recessed second main component 80 of the embodiment shown in Fig. 4 or Fig. 5.Help to prevent that by effectively it being hidden second body member, 80 inside user from damaging the engagement between the plunger 20 and second body member 80 like this.
Also have flank 89A, 89B, shoulder 33A, the 33B of its engagement plunger 20 also can prevent that user from impelling the rotation of plunger 20 with respect to second body member 80.
Also be appreciated that by have sufficient length (along plunger axis 21 vertically) plunger shoulder 33A, 33B, recall initially at plunger 20, outthrust 73A, 73B can prevent the rotation of plunger 20 when also the groove 26 and first groove 24 are withdrawn in engagement respectively.Help like this to prevent that user attempt rotary plunger 20 before beginning to recall from getting back to an exercisable position.
Thus, only find out obviously that from aforementioned part dropping to relief spring 90 when stopping fully at plunger 20 just produces the effect that plunger 20 and retractable needle 50 are recalled of being convenient to.A kind of resistance that does not have any realizable obvious spring 90 in the injection stage process is provided like this, and for the smoother sensation of the operation of syringe.
Another advantage that spring base 60 of the present invention provides is its spring 90 that can hold various sizes, operates as utilizing change needle sizes and syringe size.In the syringe that has than the higher capacity of minute hand head, be convenient to the length of the needed spring 90 of plunger 20 withdrawals may be too big so that can not be simply with plunger 20 external device (ED)s to injection tube 40.No matter its not compressed length, 90 to controlled sizes of spring base 60 compression springs.
From whole description, under the situation of the embodiment that does not limit the invention to any one special characteristic, the present invention has described the purpose of preferred embodiment.Do not breaking away under the prerequisite of the present invention and can carry out various changes and improvements description and illustrated embodiment.
For example, being used to mesh corresponding complementary fit part on the plunger assembly of second body member 80 and second body member 80 can be any suitable device and shoulder 33A, the 33B and shoulder inclined-plane 82A, the 82B that are not limited to describe.
Further be, although with boss 75A, 75B and scallop section 87A, 87B as the example that is used for assembling releasedly described first body member 70 and second body member 80, but the present invention can attempt using other device, they utilize on first body member 70 and second body member 80 complementary fit part so that releasedly in conjunction with first body member and second body member to form described housing and to keep spring 90 thus in a kind of initial compressed state.
Should be appreciated that the present invention can attempt an alternate embodiment, wherein, circumferential ramps 85A, 85B are replaced by respective channels or guide groove, they allow boss 75A, 75B to vertically move in first body member 70 and second body member, 80 disconnecting process, and do not impel second body member 80 and with the rotation of the plunger 20 of its engagement.
For binding site 21A described herein, 21B, 21C and 21D, also can attempt being used to limit the device that plunger moves as technical staff's ideal form with flange, gate, ridged thing or any other.
Claims (19)
1, a kind of spring base that is used for syringe, described syringe comprises injection tube, plunger, spring and retractable needle, described spring base comprises a housing with first body member and second body member, and be suitable for releasedly described spring being maintained compressive state, throw off up to the rotation of described first and second body members and make the spring decompression so that described retractable needle is withdrawn in the described injection tube.
2, spring base as claimed in claim 1 is characterized in that, first body member comprises two or more outthrust, in use they can mesh slidably in the described plunger respective grooves with the guiding plunger rotation.
3, spring base as claimed in claim 2 is characterized in that, described second body member comprises the recess of one or more arrangement, and they are configured to and can mesh releasedly with the corresponding boss on described first body member.
4, spring base as claimed in claim 3 is characterized in that, second body member is suitable for and described plunger engages, so that the decline of plunger triggers the disengagement of described first body member and second body member, thereby makes described spring decompression.
5, spring base as claimed in claim 4 is arranged so that the rotation of described second body member with respect to described first body member is convenient in the disengagement of described first and second body members of described housing.
6, spring base as claimed in claim 5, it is characterized in that, described second body member also comprises circumferential ramps, and described circumferential ramps is arranged to make the decompression of described spring to impel described inclined-plane to be meshed by described boss so that described second body member rotates with respect to described first body member.
7, a kind of syringe, it comprises injection tube, plunger, spring base and spring, a kind of retractable needle is installed on this syringe and is used for described syringe needle is withdrawn in the described injection tube in conjunction with described plunger with activation, described spring base comprises a housing with first body member and second body member, and be suitable for releasedly described spring being maintained compressive state, make the spring decompression so that described retractable needle is withdrawn in the described injection tube up to the disengagement of described first and second body members.
8, syringe as claimed in claim 7 is characterized in that, described first body member comprises two or more outthrust, in use they can mesh slidably in the described plunger respective grooves with the guiding plunger rotation.
9, syringe as claimed in claim 8 is characterized in that, second body member comprises one or more recess, and they are arranged to can be by the corresponding boss engagement on described first body member.
10, syringe as claimed in claim 9 is characterized in that, described plunger comprises two shoulders, and they can mesh with corresponding shoulder inclined-plane on described second body member.
11, syringe as claimed in claim 10, be configured to based on the engagement between the corresponding shoulder inclined-plane of described two shoulders and described second body member, the rotation of described shoulder selectively makes described second body member rotate with respect to described first body member, described boss and described recess are thrown off, thereby described first body member and described second body member are thrown off to allow described spring decompression.
12, syringe as claimed in claim 11, it is characterized in that, described second body member also comprises circumferential ramps, described circumferential ramps is configured to make the decompression of described spring to impel described circumferential ramps to be meshed by described boss, so that described second body member rotates with respect to described first body member.
13, syringe as claimed in claim 12, the energy of rotation of being arranged to described second body member helps described plunger to rotate to a final inoperable position.
14, syringe as claimed in claim 7 is characterized in that, in use when from described syringe injecting material, described spring is maintained a kind of compressive state by described spring base and descends up to described plunger and finish or near finishing.
15, syringe as claimed in claim 14 is arranged to make described plunger and described retractable needle to descend at described plunger and is finished or be connected when finishing.
16, syringe as claimed in claim 15 is characterized in that, described first body member of described housing and the disengagement of second body member allow the spring decompression, and this decompression is convenient to plunger and is withdrawn when combining with described retractable needle.
17, syringe as claimed in claim 16, the disengagement that is arranged so that described first body member of described housing and second body member are convenient to described second body member and are rotated with respect to described first body member.
18, syringe as claimed in claim 17 is arranged so that the energy of rotation of described second body member helps described plunger to rotate to a final inoperable position when described retractable needle combines with it.
19, syringe as claimed in claim 18, it is characterized in that, described first body member comprises two or more outthrust, and they can support corresponding bearing in the respective grooves on the described plunger described plunger is maintained described final inoperable position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003901301A AU2003901301A0 (en) | 2003-03-20 | 2003-03-20 | Syringe spring retainer |
| AU2003901301 | 2003-03-20 | ||
| AU2003905080 | 2003-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1761497A CN1761497A (en) | 2006-04-19 |
| CN100479876C true CN100479876C (en) | 2009-04-22 |
Family
ID=31500344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800075958A Expired - Fee Related CN100479876C (en) | 2003-03-20 | 2004-03-19 | Syringe spring retainer |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN100479876C (en) |
| AU (1) | AU2003901301A0 (en) |
| ZA (1) | ZA200508400B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736175B (en) * | 2014-02-12 | 2015-08-19 | 刘友红 | Disposable anti-stabbed syringe |
-
2003
- 2003-03-20 AU AU2003901301A patent/AU2003901301A0/en not_active Abandoned
-
2004
- 2004-03-19 CN CNB2004800075958A patent/CN100479876C/en not_active Expired - Fee Related
-
2005
- 2005-10-17 ZA ZA200508400A patent/ZA200508400B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200508400B (en) | 2007-04-25 |
| AU2003901301A0 (en) | 2003-04-03 |
| CN1761497A (en) | 2006-04-19 |
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Address after: New South Wales, Australia Patentee after: Unitract Syringe Pty Ltd. Address before: Western Australia, Australia Patentee before: Unitract Syringe Pty Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20200319 |