CN100469396C - Safety injection needle for medical purpose - Google Patents
Safety injection needle for medical purpose Download PDFInfo
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- CN100469396C CN100469396C CNB2004100535008A CN200410053500A CN100469396C CN 100469396 C CN100469396 C CN 100469396C CN B2004100535008 A CNB2004100535008 A CN B2004100535008A CN 200410053500 A CN200410053500 A CN 200410053500A CN 100469396 C CN100469396 C CN 100469396C
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- needle
- atrium
- sheath
- needle tubing
- tubing
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Abstract
Disclosed a safety medical injection needle comprises a sheath, a needle tube, a needle base, a safety sheath, a spring blade and a compressor sheet. Wherein, the safety sheath comprises an atrium whose inner wall is formed as upper and lower matter-stacked layer in the shape of step while the spring blade is laid on the lower layer and the compressor sheet is embedded in the upper layer; the spring blade on the lower layer of atrium is arranged by the outer force as that the needle tube can pass its through hole and when the outer force is released, the spring blade will stagger with the needle tube by the displacement of through hole; and the sheath is opening comprising a drawing base covering part of the outer wall of atrium and a drawing blade containing the needle tube. Since the invention utilizes the simply processed and easily mounted spring blade, the volume of invention is decreased to reduce the cost of packing and transportation too; utilizes the opening sheath to eliminate the problem that the needle head will be locked when removing the sheath to reduce the usage cost; and the invention reduces the used number of injection mould elements. Therefore, said invention can supply the patch production.
Description
Technical field
The present invention relates to medical needle, relate in particular to a kind of safe medical entry needle.
Background technology
Since using disposable medical equipment, a large amount of depleted apparatuses bring environmental pollution problems, and the band pin apparatus after using is often stabbed medical personnel, cause the patient on one's body virus or antibacterial along with the apparatus after using infects to medical personnel, thereby cause medical personnel to catch an illness even dead.Often there is hearsay these incident various countries.Owing to the sensitivity of acquired immune deficiency syndrome (AIDS), hepatitis and other serious hematologic disease, the problem of accidental needle sticks comes into one's own day by day at present.This shows that the syringe needle of band pin apparatus is stabbed the medical worker and had very big danger.
Therefore, the applicant once was in the applying date that March 29, number of patent application in 2002 are 02111197.9, denomination of invention discloses a kind of entry needle in for " safety medical needle device ", exactly in order to eliminate or to reduce this danger.
Shown in Fig. 1 (a)-(c), this syringe comprises a sheath 1, a needle tubing 2, a biasing member 3, a security protection shell 4 and a needle stand 5.
At outer surface the flange of its full-size of one projection greater than needle tubing remainder external diameter arranged, to form needle tube stopping part 22 near the needle tubing 2 of syringe needle 21.
Protecting crust retainer 46 promptly protects a flange sleeve pipe 46a who is nested with on the necking part between chamber 42 and the needle stand chamber 43, needle tubing 2 can be moved back and forth therein, but needle tube stopping part 22 is captured between the top of flange sleeve pipe 46a.
Biasing member 3 is contained in the offset piece cavity 41 of protecting crust 4, this biasing member 3 has one can make needle tubing 2 comprise the through hole 31 that needle tube stopping part 22 moves therein, when biasing member 3 under external force when being in the bias state shown in Fig. 1 (a) under the effect of sheath 1, needle tubing 2 can pass through hole 31, or this through hole 31 is axially aligned with needle tubing 2 and needle tubing 2 is passed wherein, when biasing member 3 is released, as pull out sheath 1, release at biasing member 3 under the effect of power this through hole 31 shown in Fig. 1 (b) with needle tubing 2 dislocation, needle tubing 2 can not be passed wherein.
When using syringe, the sheath 1 of pin is taken out.After finishing using, making security protection shell 4 break away from needle stand 5 moves towards syringe needle 21 directions, when syringe needle 21 and needle tube stopping part 22 fall back in the protection chamber 42 of protecting crust 4, because the full-size of the outward flange of needle tube stopping part 22 is greater than the internal diameter of flange sleeve pipe 46a, so when syringe needle 21 and needle tube stopping part 22 fall back in the protection chamber 42 shown in Fig. 1 (b), protecting crust 4 again can not move towards syringe needle 21 directions, meanwhile, because needle tubing 2 breaks away from biasing member 3, biasing member 3 makes the through hole 31 of biasing member 3 depart from needle tubing 21 by liberation port 411 displacements.So, the syringe needle 21 of needle tubing is limited in the protection chamber 42 of protecting crust 4, and promptly syringe needle 21 can not be exposed to the outside of security protection shell 4 again.
Above-mentioned entry needle, though the syringe needle 21 with its needle tubing of back can be limited in the protection chamber 42 of protecting crust 4, reach the purpose of avoiding the accidental needle sticks human body, but, proposed to use the notion of elastic biasing member 3 in its technical scheme on the one hand, which kind of implements structure as for this elastic biasing member 3 for and just can make whole processing simple, easy for installation and assembling back overall volume is little, but be pendent thing always; On the other hand, because what the sheath 1 of pin adopted is general cylindric pattern, like this in concrete use, that is, in the process that takes out sheath 1, excessive pull-out force very easily makes 4 misoperations of security protection shell, in advance move and seal towards syringe needle 21 directions, cause syringe needle to use, thereby produced the high phenomenon of scrappage when using, user's use cost is improved.
And well-known, the commercialization feasibility depends on cost of goods manufactured.And the similar hospital place of using entry needle, its buying decision is subjected to the influence of price very big.Above-mentioned perfect not to the utmost entry needle is difficult to reduce manufacturing cost and use cost, therefore, lacks price advantage, fails to form secondary industryization and marketingization so far.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of safe medical entry needle, it has, and processing easy to use, whole is simple, easy for installation, assembling back overall volume is little and cheap for manufacturing cost, be convenient to form industrialization and commercial advantage.
A kind of safe medical entry needle provided by the present invention, it comprises that a sheath, has a needle tubing to the needle tube stopping part of outer lug, that this needle tubing backshank is installed in wherein needle stand, a needle tubing at the outer surface near syringe needle and can pass wherein security protection shell and a needle tubing and the needle tube stopping part biasing member that can move in its through hole, it is characterized in that, it also comprises the pressing plate that a needle tubing and needle tube stopping part can move in its through hole, wherein: described biasing member is a spring leaf; Described security protection shell comprises that successively an atrium that is arranged on its top, a cross section are less than the protection chamber of this atrium, the needle stand chamber that a protecting crust retainer and cooperates with needle stand, wherein: the size of this protecting crust retainer is less than the full-size of needle tube stopping part, needle tubing can be moved back and forth therein, but needle tube stopping part is captured between its top; This atrium inwall forms the step-like upper and lower stacking yard layer of two-stage, and a spring leaf is shelved by lower floor, and pressing plate is set by the shallow slot that this atrium inwall is provided with in the upper strata; Described spring leaf effect below-center offset in external force in described atrium lower floor becomes needle tubing can pass its through hole, and external force is when removing, and this spring leaf is released its through hole displacement under the effect of power and staggered with described needle tubing in biasing; Described sheath is an open-type sheath, comprise the described atrium outer wall of a covered section pull out seat and one and this pull out the sheet that pulls out of integrated ccontaining described needle tubing.
Above-mentioned safe medical entry needle, wherein: the protecting crust retainer is the necking part between described protection chamber and the needle stand chamber, and itself and described protecting crust are an integral body.
Above-mentioned safe medical entry needle, wherein: the protecting crust retainer is the T molded cannula in the necking part that is nested with between described protection chamber and needle stand chamber.
Above-mentioned safe medical entry needle, wherein: the opening degree of open-type sheath is half, that is: and it pulls out seat and coats half described atrium outer wall, and it pulls out sheet is that semi-open type is pulled out sheet.
Above-mentioned safe medical entry needle, wherein: the security protection shell can be that two semi-involutions are formed by fixedly connecting.
Above-mentioned safe medical entry needle, wherein: needle tube stopping part is round flange, non-circular flange and thrin that at least one is protruding.
Owing to adopted above-mentioned technical solution, promptly elastic biasing member is a kind of spring leaf, not only processes simply, be convenient to install, and assembling back overall volume is little, packs, cost of transportation is little.In addition, adopt the open-type sheath, its pull-off direction is vertical with the syringe needle direction, can eliminate existing entry needle and easily make security protection shell misoperation (promptly in advance move and seal towards the syringe needle direction) and cause syringe needle to pin the phenomenon that can't use in taking out the process of sheath, has reduced use cost.In addition, realize low cost by having reduced articles injection-moulded number on making, therefore, the present invention has simple in structure, with low cost, easy to use and safe advantage, especially is convenient to form industrialization and commercialization.
Description of drawings
Fig. 1 (a)-(c) shows the structural representation of existing safe medical entry needle;
Fig. 2 is the three-dimensional exploded view of safe medical entry needle of the present invention;
Fig. 3 is the cutaway view of safe medical entry needle of the present invention.
The specific embodiment
Shown in Fig. 2-3, the present invention, promptly a kind of safe medical entry needle, it comprise a sheath 1 ', a needle tubing 2, a needle stand 5, a security protection shell 4 ', a spring leaf 3 ', T molded cannula 46a ' and a pressing plate 6.
Security protection shell 4 ' comprise successively one be arranged on the atrium 41 at its top ', a cross section less than this atrium 41 ' protection chamber 42, a protecting crust retainer 46 ' and needle stand chamber 43 that cooperates with needle stand 5.
This protecting crust retainer 46 ' be the T molded cannula 46a ' in the necking part that is nested with between protection chamber 42 and needle stand chamber 43, the diameter of this T molded cannula 46a ' pipe shaft is less than the full-size of needle tube stopping part 22, needle tubing 2 can be moved back and forth therein, but needle tube stopping part 22 is captured between its T type top;
This atrium 41 ' inwall forms the step-like upper and lower stacking yard layer of two-stage, lower floor shelve a spring leaf 3 ', pressing plate 6 is set by the shallow slot 41a ' that this atrium 41 ' inwall is provided with in the upper strata.
Under the effect of external force, spring leaf 3 ' in atrium 41 ' lower floor, be biased to needle tubing 2 can pass its through hole 31 ', and external force is when removing, its through hole 31 ' displacement under the effect of this spring leaf 3 ' release power and staggering with described needle tubing 2 in biasing, make needle tubing 2 can not pass its through hole 31 '.
Sheath 1 ' be an open-type sheath, opening degree is half, comprise one coat half atrium 41 ' outer wall pull out a 1b and one and this semi-open type of pulling out the integrated ccontaining needle tubing 2 of a 1b pull out sheet 1a.
The assembling situation and the operating position of safety medical needle of the present invention are described below in conjunction with accompanying drawing.
Apply an external force in 3 ' time of mounting spring sheet; spring leaf 3 ' be biased; make the through hole 61, spring leaf 3 of pressing plate 6 ' through hole 31 ', security protection shell 4 ' protection chamber 42, T molded cannula 46a ' and needle stand chamber 43 axially align; needle tubing 2 from protecting crust 4 ' atrium 41 ' insertion; backshank 23 is installed on the needle stand 5 then; at last open-type sheath 1 ' is enclosed within the atrium 41 of security protection shell ' outer wall on, with protection syringe needle 21.
When using entry needle, with the open-type sheath 1 of pin ' take out.After finishing using, security protection shell 4 ' disengaging needle stand 5 is moved towards syringe needle 21 directions, when syringe needle 21 and needle tube stopping part 22 fall back on protecting crust 4 ' T molded cannula 46a ' when interior, because the full-size of the outward flange of needle tube stopping part 22 is greater than the internal diameter of T molded cannula 46a ', protecting crust 4 ' again can not move towards syringe needle 21 directions, meanwhile, because needle tubing 2 disengaging spring leafs 3 ', spring leaf 3 ' under the effect of release force, be shifted, make spring leaf 3 ' through hole 31 ' depart from needle tubing 21.So, the syringe needle 21 of needle tubing be limited at protecting crust 4 ' protection chamber 42 in, promptly syringe needle 21 can not be exposed to again security protection shell 4 ' the outside.
The invention provides the extremely low safe medical entry needle of manufacturing cost, this low-cost system realizes by reducing articles injection-moulded number significantly, wherein a needle safety protecting crust only needs a moulding, two cementation laminateds relatively, the protection integral body of formation syringe needle.And, reduce articles injection-moulded number, and adopt rigidity accessories such as spring leaf, T molded cannula to improve the accuracy to size of accessory, be convenient to realize that mechanization produces automatically, this also is that can medical product realize commercial determiner easily.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique, under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or variation, therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (6)
1. safe medical entry needle, it comprises that a sheath, has the needle tubing (2), of a needle tube stopping part to outer lug (22) that this needle tubing backshank (23) is installed in wherein needle stand (5), a needle tubing (2) at the outer surface near syringe needle (21) and can pass wherein security protection shell and a needle tubing (2) and needle tube stopping part (22) biasing member that can move in its through hole, it is characterized in that, it also comprises the pressing plate (6) that a needle tubing (2) and needle tube stopping part (22) can move in its through hole (61), wherein:
Described biasing member is a spring leaf (3 ');
Described security protection shell (4 ') comprises an atrium (41 ') that is arranged on its top, cross section protection chamber (42), a protecting crust retainer (46 ') and the needle stand chamber (43) that cooperates with needle stand (5) less than this atrium (41 ') successively, wherein:
The size of this protecting crust retainer (46 ') needle tubing (2) can be moved back and forth therein, but needle tube stopping part (22) is captured between its top less than the full-size of needle tube stopping part (22);
This atrium (41 ') inwall forms the step-like upper and lower stacking yard layer of two-stage, and a spring leaf (3 ') is shelved by lower floor, and pressing plate (6) is set by the shallow slot (41a ') that this atrium (41 ') inwall is provided with in the upper strata;
Described spring leaf (3 ') becomes needle tubing (2) can pass its through hole (31 ') in the effect below-center offset of the inherent external force of described atrium (41 ') lower floor, and external force is when removing, and this spring leaf (3 ') is released its through hole (31 ') displacement under the effect of power and staggered with described needle tubing (2) in biasing;
Described sheath is an open-type sheath (1 '), comprise the described atrium of a covered section (41 ') outer wall pull out seat (1a) and one and this pull out an integrated ccontaining described needle tubing (2) pull out sheet (1b).
2. safe medical entry needle as claimed in claim 1 is characterized in that, described protecting crust retainer (46 ') is the necking part between described protection chamber (42) and needle stand chamber (43), and itself and described protecting crust (4 ') are an integral body.
3. safe medical entry needle as claimed in claim 1 is characterized in that, described protecting crust retainer (46 ') is the T molded cannula (46a ') in the necking part that is nested with between described protection chamber (42) and needle stand chamber (43).
4. as claim 1 or 2 or 3 described safe medical entry needles, it is characterized in that the opening degree of described open-type sheath (1 ') is half, that is: it pulls out seat (1a) and coats half described atrium (41 ') outer wall, and it pulls out sheet (1b) and pulls out sheet for semi-open type.
5. safe medical entry needle as claimed in claim 4 is characterized in that, described security protection shell (4 ') can be that two semi-involutions are formed by fixedly connecting.
6. safe medical entry needle as claimed in claim 4 is characterized in that, described needle tube stopping part (22) is round flange, non-circular flange and thrin that at least one is protruding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100535008A CN100469396C (en) | 2004-08-05 | 2004-08-05 | Safety injection needle for medical purpose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100535008A CN100469396C (en) | 2004-08-05 | 2004-08-05 | Safety injection needle for medical purpose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1730114A CN1730114A (en) | 2006-02-08 |
| CN100469396C true CN100469396C (en) | 2009-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100535008A Active CN100469396C (en) | 2004-08-05 | 2004-08-05 | Safety injection needle for medical purpose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100469396C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022078237A1 (en) * | 2020-10-12 | 2022-04-21 | 普昂(杭州)医疗科技股份有限公司 | Needle protection structure and protection method, and needle device |
| CN112155564A (en) * | 2020-10-12 | 2021-01-01 | 普昂(杭州)医疗科技有限公司 | Needle protection structure, protection method and needle device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795432A (en) * | 1987-02-19 | 1989-01-03 | Karczmer Claude M | Shield assembly for hypodermic injection devices |
| US5279591A (en) * | 1990-07-16 | 1994-01-18 | Simon Alexander Z | Protector for needle catheter |
| CN1157745A (en) * | 1995-06-07 | 1997-08-27 | 庄臣及庄臣医药有限公司 | Catheter needle locking and catheter hub unlocking mechanism |
| CN1169880A (en) * | 1995-06-07 | 1998-01-14 | 庄臣及庄臣医药有限公司 | Tip protection device |
| US6004294A (en) * | 1998-04-09 | 1999-12-21 | Becton, Dickinson And Company | Catheter and introducer needle assembly with needle shield |
| CN1448191A (en) * | 2002-03-29 | 2003-10-15 | 上海康德莱企业发展集团有限公司 | Safety medical needle device |
-
2004
- 2004-08-05 CN CNB2004100535008A patent/CN100469396C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795432A (en) * | 1987-02-19 | 1989-01-03 | Karczmer Claude M | Shield assembly for hypodermic injection devices |
| US5279591A (en) * | 1990-07-16 | 1994-01-18 | Simon Alexander Z | Protector for needle catheter |
| CN1157745A (en) * | 1995-06-07 | 1997-08-27 | 庄臣及庄臣医药有限公司 | Catheter needle locking and catheter hub unlocking mechanism |
| CN1169880A (en) * | 1995-06-07 | 1998-01-14 | 庄臣及庄臣医药有限公司 | Tip protection device |
| US6004294A (en) * | 1998-04-09 | 1999-12-21 | Becton, Dickinson And Company | Catheter and introducer needle assembly with needle shield |
| CN1448191A (en) * | 2002-03-29 | 2003-10-15 | 上海康德莱企业发展集团有限公司 | Safety medical needle device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1730114A (en) | 2006-02-08 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: KANG DELAI ZHEJIANG MEDICAL DEVICES CO. Free format text: FORMER OWNER: SHANGHAI KANGDELAI ENTERPRISE DEVELOPMENT GROUP CO., LTD. Effective date: 20071116 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20071116 Address after: Yongqiang road in Longwan District of Wenzhou City, Zhejiang Province, No. 252 325000 Applicant after: Zhejiang Kindly Medical Devices Co., Ltd. Address before: 201803 Shanghai Huajiang Road No. 171 Applicant before: Shanghai Kangdelai Enterprise Development Group Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |