CN102908700A - Safe syringe - Google Patents
Safe syringe Download PDFInfo
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- CN102908700A CN102908700A CN2012104750525A CN201210475052A CN102908700A CN 102908700 A CN102908700 A CN 102908700A CN 2012104750525 A CN2012104750525 A CN 2012104750525A CN 201210475052 A CN201210475052 A CN 201210475052A CN 102908700 A CN102908700 A CN 102908700A
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- syringe
- needle holder
- core bar
- closure
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Abstract
The invention provides a safe syringe belonging to the technical field of medical appliances and solving the problems that the existing syringe has a poor sealing effect, a needle head can be broken, etc. The safe syringe comprises a needle cylinder, a core rod, a rubber plug and a needle head seat, wherein the needle cylinder is cylindrical; the core rod is positioned in the needle cylinder and can slide; the rubber plug is mounted at the inner end of the core rod, and the outer end of the core rod extends out of the needle cylinder; the needle head seat is connected at the front end of the needle cylinder; the inner side of the needle head seat is provided with a locking part; a positioning structure I is arranged between the outer side of the needle head seat and the needle cylinder; a positioning structure II is arranged between the locking part and the inner side of the needle head seat; when the positioning structure II enables the locking part and the needle head seat to be connected, the positioning structure I can enable the needle head seat and the needle cylinder to have a connection trend; the core rod is provided with a clamping structure which can be clamped at the end part of the core rod across the locking part; and after the core rod drives the locking part to break away from the positioning structure II, the side part of the needle head seat can retract inwards, so that the needle head seat can break away from the needle cylinder. The safe syringe has the advantages of simple structure, high stability in use and the like.
Description
Technical field
The invention belongs to technical field of medical instruments, relate to a kind of syringe, particularly a kind of safety injector.
Background technology
Syringe is to use clinically maximum a kind of medical apparatus, uses at present the most disposable plastic syringe.Although disposable syringe has been controlled the problem of cross infection effectively, along with the mankind's progress, the theory of unidirectional protection is fallen behind.To having polluted the syringe needle of blood samples of patients in the syringe use procedure, may cause the injury to user, discarded syringe also may cause unexpected injury to this some people in follow-up storage, transportation, during Destruction.Therefore, the concept of multidirectional protection is arisen at the historic moment.Safety injector is exactly a kind of medical apparatus of multidirectional protection concept, and it not only protects the patient to avoid cross infection, has also protected simultaneously the medical personnel that use it and the follow-up personnel that might touch it, avoids the injury of polluted syringe needle.The basic demand that safety injector need to satisfy is: safe, economic, practical, reliable.Satisfy the requirement of these eight words, the appearance product of regracting formula safety injector is a lot of at present, but because complex structure, particularly part causes not can manufacture more than the overwhelming majority that accounted for more than 7, and cost is high, selling price does not just have captivation yet, often promotes not open.
Its publication number of Chinese patent CN2710662Y provides a kind of " disposable use self-destroy safety injector ", and it is the piston that built-in entry needle and built-in dogging are installed in the overcoat of syringe.Fluid injection is complete, piston and needle stand close contact, when continuing to advance core bar, sharp dogging punctures continuously piston and needle stand and is tightened, and draws core bar on this moment, entry needle is controlled to be advanced in the overcoat, rotate core bar and advance, the needle tubing distortion of being obstructed is damaged in syringe, not only unrenewable also can preventing stung medical worker and waste treatment personnel with the entry needle mistake of crossing, and reaches self-destruction and safe disposal garbage dual purpose.
But its sealing effectiveness is bad, and medicinal liquid may be through the inner leakage of core bar.And syringe needle is subject to jam in the core bar rotation process, syringe needle may be fractureed when situation is serious.
Existing other disposable syringe all exists similar problem.
Summary of the invention
The objective of the invention is the problems referred to above of existing for prior art, a kind of simple in structure, safety injector that stability in use is high is provided.
Purpose of the present invention can realize by following technical proposal:
A kind of safety injector, comprise syringe, core bar, plug and needle holder, described syringe is cylindric, above-mentioned core bar is positioned at syringe and can slides, plug is installed in core bar the inner and syringe is stretched out in the core bar outer end, described needle holder is connected to the syringe front end, it is characterized in that, described needle holder inboard has closure, has location structure one between the described needle holder outside and the syringe, has location structure two between described closure and the needle holder inboard, when location structure two makes closure be connected with needle holder, above-mentioned location structure one can make needle holder and syringe have the trend that is connected, and has the interface arrangment that can cross closure and be connected to its end on the described core bar, and above-mentioned needle holder sidepiece can inside contract and makes needle holder break away from syringe after above-mentioned core bar drives closure to break away from location structure two.
In this syringe, core bar is not shifted the end onto when normally using.By above-mentioned location structure one and location structure two, needle holder can firmly be connected to the syringe front end, and closure can firmly be connected to the needle holder inboard simultaneously.
During self-destruction, promote first core bar and move to the syringe front end, after the interface arrangment on the core bar was crossed closure, interface arrangment was connected to the closure end.At this moment, to back end of syringe pulling core bar, core bar drive closure moves down and makes location structure two separation, that is: it is inboard that closure breaks away from needle holder.Because closure breaks away from, the needle holder end can inside contract, and location structure one separates, that is: needle holder breaks away from syringe.Thereby, the self-destruction of safety syringe.
In above-mentioned safety injector, described needle holder end has some breach makes the needle holder end form the clamping sheet of some limb shapes by above-mentioned breach, and above-mentioned location structure one is between some clamping sheets and syringe.
Some clamping sheets have certain elasticity, and when closure was positioned at needle holder, clamping sheet inboard stopped, the clamping sheet can not bounce back.In case after closure broke away from needle holder, shackle member just can inside contract the disengaging locating slot after losing and supporting.
In above-mentioned safety injector, described location structure one comprises locating slot and the outwardly plush copper of clamping sheet sidepiece that the syringe inboard is recessed into ringwise.
Plush copper is embedded in the locating slot place, when closure is filled in clamping sheet inboard needle holder and syringe is firmly linked together.
In above-mentioned safety injector, described location structure two comprises gear edge and the inboard recessed positioning recess of needle holder that the closure sidepiece protrudes.
When the gear edge was embedded in positioning recess, closure can firmly be connected to the needle holder inboard.
In above-mentioned safety injector, described needle holder inboard is close to the positioning recess place and has the limit notch that is recessed into ringwise together, and above-mentioned gear is along being connected in the limit notch place.
When above-mentioned location structure two separates, that is: gear is after break away from positioning recess, and closure continues mobile and makes gear on it after embed limit notch, again is connected between closure and the needle holder.But location structure one keeps released state at this moment.That is to say, core bar can drive closure, needle holder together moves in the syringe.
In above-mentioned safety injector, described interface arrangment comprises the card that is positioned at the core bar sidepiece, and described card and core bar axial line tilt and an end and the core bar of card are connected, and the card other end is away from the core bar sidepiece.
When core bar moves to the syringe front end, can cross closure behind the lateral surface compressive deformation that card tilts.In case card is crossed behind the closure after the elastic reaction of himself restores shape next time, the card other end can be resisted against the closure end.
In above-mentioned safety injector, the quantity of described card is two and the symmetrical both sides that are distributed in core bar.
In above-mentioned safety injector, one end of described closure is the connecting portion that is complementary with the needle holder inboard, the sealing of the other end of closure for being complementary with the syringe inboard, above-mentioned connecting portion in needle holder, above-mentioned sealing extended needle seat and and syringe between form sealing.
Connecting portion makes the junction sealing between needle holder and the closure, and sealing makes between closure and the syringe and seals.Interference fit is all adopted at above-mentioned formed sealing position.
In above-mentioned safety injector, described closure is to be made by the macromolecular material spare material with self-lubricating property.Thereby so that both kept reliable hermetically-sealed construction between closure and needle holder, closure and the syringe, again can so that closure when mobile because lubrication and resistance is very little.
In above-mentioned safety injector, described closure is high density polyethylene (HDPE) or polyamide.
Certainly, the closure that the macromolecular material that adopts thermoplastic elastomer (TPE), natural rubber or synthetic rubber etc. to have the high resiliency characteristic according to practical situation is made also is feasible.In concrete use procedure, adopt thermoplastic elastomer (TPE) or its Performance Ratio of synthetic rubber better.
In above-mentioned safety injector, described back end of syringe inboard has self-distruction structure, and above-mentioned core bar the inner can be connected in the self-distruction structure place.
Core bar drive closure, needle holder one in the same way back end of syringe move to the self-distruction structure place, self-distruction structure can be spacing with core bar, core bar fractures after core bar is limited, be positioned at syringe core bar part can not before movement can not after move, the needle holder that links together with core bar is positioned at syringe all the time, thereby can not stab the operator.
In above-mentioned safety injector, described self-distruction structure comprises the self-destruction groove that the syringe inboard is recessed into ringwise, the both sides of self-destruction groove are respectively the front bulge loop that protrudes ringwise and the rear bulge loop that protrudes ringwise, the inner size of above-mentioned core bar is greater than rear bulge loop size, and the inner size of described core bar is slightly larger than the lordosis ring size.
Because the inner size of core bar is slightly larger than the lordosis ring size, therefore, applies external force and can make core bar the inner cross front bulge loop to be arranged in the self-destruction groove.Simultaneously, because the inner size of core bar is greater than rear bulge loop size, core bar is stopped and can not be crossed by it by rear bulge loop.Therefore, core bar is limited in the self-destruction groove.The needle holder of the safety injector after the self-destruction and the syringe needle that is connected on the needle holder all are positioned at syringe.
Compared with prior art, the safety syringe is owing to only being comprised of syringe, core bar, plug, needle holder and closure, and relatively simple for structure, cost is lower.
Simultaneously, the safety injection that is arranged so that of needle holder can be used the syringe needle of ordinary construction.Its suitability is higher.In addition, adopt have a self lubricity or have the closure that elastic macromolecular material makes and just can realize sealing, do not need to arrange in addition the structures such as sealing ring, can make again the closure moving resistance little, have higher practical value.
Description of drawings
Fig. 1 is the sectional structure schematic diagram of safety syringe.
Fig. 2 is the sectional structure schematic diagram at safety injector syringe front end place.
Fig. 3 is the sectional structure schematic diagram in the safety syringe self-destruction process.
Fig. 4 is the sectional structure schematic diagram after the self-destruction of safety syringe is finished.
Fig. 5 is the sectional structure schematic diagram of needle holder in the safety syringe.
Fig. 6 is the sectional structure schematic diagram of closure in the safety syringe.
Fig. 7 is the sectional structure schematic diagram of syringe in the safety syringe.
Among the figure, 1, syringe; 1a, locating slot; 1b, self-destruction groove; 1c, front bulge loop; 1d, rear bulge loop; 2, core bar; 2a, card; 3, plug; 4, needle holder; 4a, clamping sheet; 4a1, plush copper; 4b, positioning recess; 4c, limit notch; 5, closure; 5a, gear edge; 5b, connecting portion; 5c, sealing.
The specific embodiment
Such as Fig. 1 and 2 and Fig. 3 and shown in Figure 4, the safety syringe comprises syringe 1, core bar 2, plug 3 and needle holder 4.Syringe 1 is cylindric, and core bar 2 is positioned at syringe 1 and can slides, and plug 3 is installed in core bar 2 the inners and syringe 1 is stretched out in core bar 2 outer ends, and needle holder 4 is connected to syringe 1 front end.
Have the interface arrangment that to cross closure 5 and be connected to its end on the core bar 2, and needle holder 4 sidepieces can inside contract and make needle holder 4 break away from syringes 1 after core bar 2 drives closures 5 to break away from location structures two.
As shown in Figure 5, needle holder 4 ends have some breach makes needle holder 4 ends form the clamping sheet 4a of some limb shapes by above-mentioned breach, and location structure one is between some clamping sheet 4a and syringe 1.Location structure one comprises the ringwise plush copper 4a1 that protrudes of recessed locating slot 1a and clamping sheet 4a sidepiece of syringe 1 inboard.
Location structure two comprises that the gear at the protruding place of closure 5 sidepieces is along 5a and needle holder 4 inboard recessed positioning recess 4b.Needle holder 4 inboards are close to positioning recess 4b place and have the limit notch 4c that is recessed into ringwise together, and gear can be connected in limit notch 4c place along 5a.
Such as Fig. 2 and shown in Figure 6, interface arrangment comprises the card 2a that is positioned at core bar 2 sidepieces, and card 2a and core bar 2 axial lines tilt and an end and the core bar 2 of card 2a are connected, and the card 2a other end is away from core bar 2 sidepieces.In the present embodiment, the quantity of card 2a is two and the symmetrical both sides that are distributed in core bar 2.
Closure 5 is for having the macromolecular material spare material of self-lubricating property.In the present embodiment, closure 5 is high density polyethylene (HDPE) or polyamide.One end of closure 5 is the connecting portion 5b that is complementary with needle holder 4 inboards, and the other end of closure 5 is the sealing 5c that is complementary with syringe 1 inboard.Connecting portion 5b is positioned at needle holder 4, sealing 5c extended needle seat 4 and and syringe 1 between adopt interference fit to form sealing.
As shown in Figure 7, syringe 1 rear inside has self-distruction structure, and core bar 2 the inners can be connected in the self-distruction structure place.Self-distruction structure comprises the self-destruction groove 1b that syringe 1 inboard is recessed into ringwise, the both sides of self-destruction groove 1b are respectively the front bulge loop 1c that protrudes ringwise and the rear bulge loop 1d that protrudes ringwise, core bar 2 inner sizes are greater than rear bulge loop 1d size, and core bar 2 inner sizes are slightly larger than front bulge loop 1c size.
In this syringe, core bar 2 is not shifted the end onto when normally using, and that is to say that the card 2a of core bar 2 does not cross closure 5.Because closure 5 is positioned at needle holder 4 all the time, the needle holder 4 that the inboard is squeezed can make needle holder 4 firmly be connected with syringe 1 by location structure one, simultaneously, because closure 5 is positioned at needle holder 4 all the time, can firmly be connected to needle holder 4 inboards by location structure two closures 5.
During self-destruction, promote first core bar 2 and move to syringe 1 front end, until the card 2a on the core bar 2 be squeezed cross closure 5 after, card 2a resets and the end of its inclination is connected to closure 5 ends.At this moment, to syringe 1 rear end pulling core bar 2, core bar 2 drive closures 5 move down and make location structure two separation, that is: the gear at the protruding place of closure 5 sidepieces breaks away from needle holder 4 inboard recessed positioning recess 4b along 5a.Core bar 2 continues in the folding process, and gear can be connected in limit notch 4c place along 5a, and closure 5 reconnects together with needle holder 4.
Continue drop-down core bar 2, core bar 2 drives closure 5, needle holder 4 together moves in the syringe 1 again.Because core bar 2 inner sizes are slightly larger than front bulge loop 1c size, therefore, apply external force and can make core bar 2 the inners cross front bulge loop 1c to be arranged in self-destruction groove 1b.Simultaneously, because core bar 2 inner sizes are greater than rear bulge loop 1d size, core bar 2 is stopped and can not be crossed by it by rear bulge loop 1d.Core bar 2 is limited among the self-destruction groove 1b.The syringe needle that core bar 2 is fractureed rear closure 5, needle holder 4 and be connected on the needle holder 4 all is positioned at syringe 1.Obviously, the syringe needle of moving syringe 1 inner chamber to can not stretch out again, and polluted syringe needle is protected fully.
Claims (10)
1. safety injector, comprise syringe (1), core bar (2), plug (3) and needle holder (4), described syringe (1) is cylindric, above-mentioned core bar (2) is positioned at syringe (1) and can slides, plug (3) is installed in core bar (2) the inner and syringe (1) is stretched out in core bar (2) outer end, described needle holder (4) is connected to syringe (1) front end, it is characterized in that, described needle holder (4) inboard has closure (5), has location structure one between described needle holder (4) outside and the syringe (1), has location structure two between described closure (5) and needle holder (4) inboard, when location structure two makes closure (5) and needle holder (4) when being connected, above-mentioned location structure one can make needle holder (4) have the trend that is connected with syringe (1), have the interface arrangment that to cross closure (5) and be connected to its end on the described core bar (2), and above-mentioned needle holder (4) sidepiece can inside contract and makes needle holder (4) break away from syringe (1) after above-mentioned core bar (2) drives closure (5) to break away from location structure two.
2. safety injector according to claim 1, it is characterized in that, described needle holder (4) end has some breach makes needle holder (4) end form the clamping sheet (4a) of some limb shapes by above-mentioned breach, and above-mentioned location structure one is positioned between some clamping sheets (4a) and the syringe (1).
3. safety injector according to claim 2 is characterized in that, described location structure one comprises inboard locating slot (1a) and the outwardly plush copper (4a1) of clamping sheet (4a) sidepiece that is recessed into ringwise of syringe (1).
4. safety injector according to claim 2 is characterized in that, described location structure two comprises gear edge (5a) and the inboard recessed positioning recess (4b) of needle holder (4) that closure (5) sidepiece protrudes.
5. safety injector according to claim 4, it is characterized in that, described needle holder (4) inboard is close to positioning recess (4b) and locates to have the limit notch (4c) that is recessed into ringwise together, and above-mentioned gear can be connected in limit notch (4c) along (5a) and locate.
6. according to claim 1 and 2 or 3 or 4 or 5 described safety injectors, it is characterized in that, described interface arrangment comprises the card (2a) that is positioned at core bar (2) sidepiece, described card (2a) tilts with core bar (2) axial line and an end and the core bar (2) of card (2a) are connected, and card (2a) other end is away from core bar (2) sidepiece.
7. according to claim 1 and 2 or 3 or 4 or 5 described safety injectors, it is characterized in that, one end of described closure (5) is the connecting portion (5b) that is complementary with needle holder (4) inboard, the other end of closure (5) is the sealing (5c) that is complementary with syringe (1) inboard, above-mentioned connecting portion (5b) is positioned at needle holder (4), above-mentioned sealing (5c) extended needle seat (4) and and syringe (1) between form sealing.
8. safety injector according to claim 7 is characterized in that, described closure (5) is to be made by the macromolecular material spare material with self-lubricating property.
9. safety injector according to claim 8 is characterized in that, described closure (5) is high density polyethylene (HDPE) or polyamide.
10. according to claim 1 and 2 or 3 or 4 or 5 described safety injectors, it is characterized in that, described syringe (1) rear inside has self-distruction structure, above-mentioned core bar (2) the inner can be connected in the self-distruction structure place, described self-distruction structure comprises the inboard self-destruction groove (1b) that is recessed into ringwise of syringe (1), the both sides of self-destruction groove (1b) are respectively the front bulge loop (1c) that protrudes ringwise and the rear bulge loop (1d) that protrudes ringwise, the inner size of above-mentioned core bar (2) is greater than rear bulge loop (1d) size, and the inner size of described core bar (2) is slightly larger than front bulge loop (1c) size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475052.5A CN102908700B (en) | 2012-11-20 | 2012-11-20 | A kind of safety injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475052.5A CN102908700B (en) | 2012-11-20 | 2012-11-20 | A kind of safety injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102908700A true CN102908700A (en) | 2013-02-06 |
| CN102908700B CN102908700B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210475052.5A Active CN102908700B (en) | 2012-11-20 | 2012-11-20 | A kind of safety injector |
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| Country | Link |
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| CN (1) | CN102908700B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201744031U (en) * | 2010-08-06 | 2011-02-16 | 上海康德莱企业发展集团有限公司 | Disposable retractable syringe |
| CN102284112A (en) * | 2010-06-17 | 2011-12-21 | 昆山和兴医疗科技有限公司 | Safe self-destructing injector with locking structure |
| CN102327657A (en) * | 2010-11-23 | 2012-01-25 | 房东森 | Safety injector |
| CN202236714U (en) * | 2011-10-20 | 2012-05-30 | 柏保东 | Conveniently-assembled high-safety self-destroying injector |
| CN202961370U (en) * | 2012-11-20 | 2013-06-05 | 玉环县正日塑机有限公司 | Safety syringe |
-
2012
- 2012-11-20 CN CN201210475052.5A patent/CN102908700B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284112A (en) * | 2010-06-17 | 2011-12-21 | 昆山和兴医疗科技有限公司 | Safe self-destructing injector with locking structure |
| CN201744031U (en) * | 2010-08-06 | 2011-02-16 | 上海康德莱企业发展集团有限公司 | Disposable retractable syringe |
| CN102327657A (en) * | 2010-11-23 | 2012-01-25 | 房东森 | Safety injector |
| CN202236714U (en) * | 2011-10-20 | 2012-05-30 | 柏保东 | Conveniently-assembled high-safety self-destroying injector |
| CN202961370U (en) * | 2012-11-20 | 2013-06-05 | 玉环县正日塑机有限公司 | Safety syringe |
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| Publication number | Publication date |
|---|---|
| CN102908700B (en) | 2016-08-03 |
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Application publication date: 20130206 Assignee: HUNAN LUZHOU HUIKANG DEVELOPMENT CO., LTD. Assignor: Yuhuan Zhengri Plastic Machine Co., Ltd. Contract record no.: 2017430000007 Denomination of invention: Safety injector Granted publication date: 20160803 License type: Exclusive License Record date: 20170524 |