CN201519196U - Needle head protecting device of blood taking needle - Google Patents
Needle head protecting device of blood taking needle Download PDFInfo
- Publication number
- CN201519196U CN201519196U CN2009201987424U CN200920198742U CN201519196U CN 201519196 U CN201519196 U CN 201519196U CN 2009201987424 U CN2009201987424 U CN 2009201987424U CN 200920198742 U CN200920198742 U CN 200920198742U CN 201519196 U CN201519196 U CN 201519196U
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- China
- Prior art keywords
- needle
- head
- blood taking
- medicated cap
- shank
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Abstract
A needle head protecting device of a blood taking needle comprises a needle bar and a protecting cap connected with the needle bar. The needle head protecting device is characterized in that the needle rod is provided with a head part, at which a through hole is formed; the protecting cap comprises a cap head and a cap body connected into a whole; a groove capable of being matched with the contour of the head part of the needle bar is formed on the cap head; a positioning projection, which can be inserted into the through hole of the head part and is in interference fit with the through hole, is also formed in the groove; the cap body is sleeved outside a sliding sleeve; and the size of the opening of the cap body is matched with the outer diameter of the sliding sleeve. Compared with the prior art, as long as the positioning projection in the groove of the protecting cap is directed at and inserted into the through hole of the head part of the need bar, the convenient and quick assembly of the protecting cap and the needle bar can be realized, so that the protecting cap can be prevented from rotating relative to the needle bar, and the false triggering of the needle head is effectively avoided.
Description
Technical field
This utility model relates to a kind of blood taking needle, particularly relates to a kind of end that is applicable to and pushes the protector of the blood taking needle syringe needle of emission.
Background technology
When conventional medical treatment is taken a blood sample,, use disposable blood taking needle to come blood sample collection usually both at home and abroad for avoiding cross infection.But the needle point after common disposable blood taking needle uses is exposed to the outside, needs artificial treatment that syringe needle is pulled up, because the syringe needle after the blood sampling exposes, the staff is easy to prick because of carelessness when handling, and can cause cross infection, has certain potential safety hazard.Therefore, having occurred the retractible disposable blood collecting pen of various use back syringe needles in the prior art, is 03141465.6 Chinese invention patent " disposable safe type blood taking needle ", the Chinese invention patent " needle tip retracts type disposable safe blood taking needle and primary emission type safety blood taking pen " that the patent No. is ZL200410064671.0 etc. as application number.
In order to protect the syringe needle of blood taking needle; and avoid when not using the accident of stabbing that causes because trigger syringe needle; present disposable blood taking needle also all disposes protective cap; yet; the protective cap of blood taking needle mostly is closed at present, is interference fit between protective cap and the needle body, and is cumbersome when product assembles; greatly reduce efficiency of assembling, cost is higher.So; just like the patent No. is the emission protector that the Chinese utility model " disposable safe automatic blood-taking needle emission protector " of ZL200420025753.X then discloses a kind of like this blood taking needle; it is characterized in that: on the pin medicated cap of blood taking needle or the block protection tongue that extends to the housing sidepiece is arranged; pin medicated cap or block are under confined state, and this protection tongue blocks to trigger to block penetrates the path of structure.This patent is penetrated structure to one-off card effectively and is protected before blood taking needle uses; avoided because of user accidentally or maloperation striking button cause blood taking needle to lose efficacy; but; the emission protector of above-mentioned patent is merely able to be applicable to that sidepiece pushes the disposable safe blood taking needle of emission; and be not suitable for the blood taking needle structure that emission is pushed in the end; and; the protective cap of this patent also is enclosed; assembling is trouble comparatively; and the protection tongue is that to be connected protective cap integrated; need two outer processing molding, technology is comparatively complicated, awaits to be further improved.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of assembly structure more simple and can prevent the blood taking needle needle guard mechanisms that syringe needle is launched because of maloperation effectively at above-mentioned prior art present situation.
This utility model solves the problems of the technologies described above the technical scheme that is adopted: the needle guard mechanisms of this blood taking needle includes
Shank is connected the needle body front portion of described blood taking needle, is arranged with the sliding sleeve that matches with the housing of described blood taking needle outside this shank, and of this sliding sleeve stretches out in outside the housing of blood taking needle and a spacing end at this housing;
Protective cap is connected on the described shank;
It is characterized in that: described shank has the head that offers through hole; described protective cap includes medicated cap head and the medicated cap body that is connected as a single entity; offer on the described medicated cap head can with the suitable groove of the outline of described shank head; also have in this groove one can insert within the through hole of described head and with this through hole be the positioning convex of interference fit; described medicated cap body is socketed in outside the described sliding sleeve, and the openings of sizes of this medicated cap body and the external diameter of described sliding sleeve are suitable.
In order to be convenient to the assembling of shank and protective cap; as preferably, the head of described shank then is deltiod, and described through hole is a mounting hole that runs through along the thickness direction of this shank head; correspondingly, described positioning convex has the waist drum type cross section suitable with the shape of described through hole.
Cause the blood taking needle inefficacy that is excited in order to prevent sliding sleeve to be subjected to external force extruding, described medicated cap body includes pedestal and is arranged on the support chip of these pedestal both sides symmetrically, described pedestal is connected the bottom of described medicated cap head and offers the breach that is connected with the groove of described medicated cap head, and the distance that the degree of depth of described medicated cap body and described sliding sleeve stretch out outside the housing is complementary.So the medicated cap body is set in outside the sliding sleeve, and the degree of depth of medicated cap body is identical with distance outside sliding sleeve stretches out housing, and making does not have the gap of relative motion vertically between protective cap and the sliding sleeve, can avoid sliding sleeve to be squeezed and the false triggering syringe needle.
As preferably, the outer wall of described support chip is provided with intilted inclined-plane in the position near the bottom.The inclined-plane of support chip bottom can make protective cap have the trend of inwardly tightening up when being subjected to the external force extruding, prevents the slippage between medicated cap body and the slide block.
In order to improve the intensity of protective cap, and conveniently can back out shank together with protective cap in use, described medicated cap head also is provided with reinforcement symmetrically in the both sides of described groove.This reinforcement can either improve the medicated cap rigidity of the nape degree of protective cap, and the point of application of rotation protective cap can be provided for user again.
Compared with prior art, advantage of the present utility model is: the protective cap that this utility model and shank match not is enclosed tube-in-tube structure, offer reeded Open architecture but adopt, when connecting, as long as the through hole of the positioning convex alignment pins club head in the protective cap groove inserted the convenient assembling that can realize protective cap and shank and reliably is connected, the assembling mode is more simple, but also can prevent that protective cap from rotating with respect to shank, and then avoid the false triggering of syringe needle effectively; The assembling of protective cap of the present utility model and shank is simple, is suitable for producing in enormous quantities, and overall structure is simply attractive in appearance, makes conveniently, and cost is low.
Description of drawings
Fig. 1 is the blood taking needle structural representation of this utility model embodiment.
Fig. 2 is the sectional arrangement drawing (needle body is not cut open) of this utility model embodiment.
Fig. 3 is one of perspective view of this utility model protective cap.
Fig. 4 be this utility model protective cap perspective view two.
Fig. 5 is the perspective view (syringe needle does not stretch out) of this utility model needle body.
Fig. 6 is the perspective view (syringe needle stretches out) of this utility model needle body.
The specific embodiment
Embodiment describes in further detail this utility model below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 6, be specific embodiment of the utility model, this blood taking needle includes housing 1, bonnet 2, needle body 3, sliding sleeve 4 and protective cap 5;
Wherein, bonnet 2 is connected the bottom of housing 1, this bonnet 2 is provided with the flanging 21 that turns up at end face, the inwall of housing 1 bottom is provided with to block and establishes flanging 21 and prevent the annular groove 13 that bonnet 2 is extracted, in a single day the flanging 21 of bonnet 2 snaps in the annular groove 13 of housing 1, just non-dismountable, bonnet 2 can be separated with housing 1 after having only destruction, guarantee the disposable use of blood taking needle;
Sliding sleeve 4 is set in the outside and open-ended of needle body 3, and one of this sliding sleeve 4 stretches out in outside the housing 1 and a spacing end at this shell 1 body, and the other end of sliding sleeve 4 is arranged in the housing 1, and sliding sleeve 4 stretches out in of housing 1 and also is connected with protective cap 5.
Also include first spring 6 and second spring 7 that act on needle body 3 afterbodys and head respectively, one end of first spring 6 is fixed in needle body 3 afterbodys, the other end of this first spring 6 and bonnet 2 offset, one end of second spring 7 is fixed on needle body 3 step surfaces, and the annular convex shoulder 41 that forms on inner face of the other end of this second spring 7 and sliding sleeve offsets.
Present embodiment is to make things convenient for being connected of protective cap and needle body, protective cap 5 is designed to Open architecture, include the medicated cap head 51 and the medicated cap body 52 that are connected as a single entity, the head 311 of shank 31 then is designed to deltiod, shank 31 offers a mounting hole 312 that runs through along the thickness direction of this shank head 311 at the head of deltiod, wherein, protective cap 5 on medicated cap head 51, offer can with the suitable groove 511 of the outline of shank head 311, also have a positioning convex 512 that can insert in the mounting hole 312 of shank 31 in this groove 511, the cross section of positioning convex 512 is the waist drum type and is interference fit with this mounting hole 312;
Medicated cap body 52 is socketed in outside the sliding sleeve 4 and has and the suitable openings of sizes of the external diameter of sliding sleeve 4, medicated cap body 52 includes pedestal 521 and is arranged on the support chip 522 of these pedestal 521 both sides symmetrically, pedestal 521 is connected the bottom of medicated cap head 51 and offers the breach 524 that is connected with the groove 511 of medicated cap head 51, the outer wall of support chip 522 is provided with intilted inclined-plane 523 in the position near the bottom, inclined-plane 523 can prevent that protective cap 5 is subjected to external force when extruding and causes the medicated cap body 52 of protective cap 5 to skid off the slide block 4 of blood taking needle, make protective cap 5 when being subjected to the external force extruding, have the trend of inwardly tightening up, prevent the slippage between medicated cap body 52 and the slide block 4; And, for the slide block 4 that prevents blood taking needle makes the blood taking needle stimulation failure at the Shi Buhui that is squeezed, support chip 522 root edges just in time are that sliding sleeve 4 stretches out the distance outside the housing 1 to the distance between pedestal 521 inwalls, be that medicated cap body 52 is set in outside the sliding sleeve 4, the root edge of medicated cap body 52 offsets with the housing 1 that is socketed in outside the sliding sleeve 4 just, be not have the gap vertically between medicated cap body 52 and the sliding sleeve 4, can avoid mistake to push sliding sleeve 4 and 32 emissions of triggering syringe needle.
Medicated cap head 51 also is provided with triangle reinforcement 513 symmetrically in the both sides of groove 511, this triangle reinforcement 513 has two right-angle sides and a hypotenuse, the outer wall of two right-angle sides difference attachment cap heads 51 of reinforcement 513 and the pedestal 521 of medicated cap body 52, the hypotenuse of reinforcement 513 then tilts from the base direction of medicated cap head 51 to medicated cap body 52; Reinforcement 513 the intensity that has improved protective cap is set, when rotating protective cap, hands can directly pinch the position of reinforcement, is convenient to the application of force more.
The operation principle of present embodiment is:
During assembling, at first, first spring 6 and second spring, 7 pretightning forces are set, guarantee that the elastic-restoring force that produces can guarantee the smooth emission of syringe needle 32 under the compression of first spring 6, second spring, 7 extended states, and the elastic-restoring force that guarantees to stretch at first spring 6, produces under second spring, 7 compressive states is withdrawn into again syringe needle 32 in the housing 1 and keeps this state; Then, protective cap 5 is connected on the shank 31, makes to be positioned at the positioning convex 512 of medicated cap head 51 grooves 511 and the mounting hole 312 of shank 31 heads carries out interference fit, 52 of medicated cap bodies just in time are set in outside the sliding sleeve 4.
During use, finger pinches the reinforcement of protective cap medicated cap head both sides, owing to connect for close-fitting between protective cap and the shank; when protective cap was backed out in rotation, shank was twisted together with protective cap, pushed sliding sleeve vertically; the i.e. emission ejection from needle body of syringe needle can realize blood sampling.
The protective cap of present embodiment has adopted open structure; make the assembling between protective cap and the shank connect more convenient, simple; and; the medicated cap body of protective cap and the cooperation between the sliding sleeve can avoid protective cap sliding sleeve when not pulling up to prevent that blood taking needle from being excited because of slide block is squeezed by mistake and cause losing efficacy along circumferential relative slip.
Claims (5)
1. the needle guard mechanisms of a blood taking needle includes
Shank is connected the needle body front portion of described blood taking needle, is arranged with the sliding sleeve that matches with the housing of described blood taking needle outside this shank, and of this sliding sleeve stretches out in outside the housing of blood taking needle and a spacing end at this housing;
Protective cap is connected on the described shank;
It is characterized in that: described shank has the head that offers through hole; described protective cap includes medicated cap head and the medicated cap body that is connected as a single entity; offer on the described medicated cap head can with the suitable groove of the outline of described shank head; also have in this groove one can insert within the through hole of described head and with this through hole be the positioning convex of interference fit; described medicated cap body is socketed in outside the described sliding sleeve, and the openings of sizes of this medicated cap body and the external diameter of described sliding sleeve are suitable.
2. the needle guard mechanisms of blood taking needle according to claim 1; it is characterized in that: the head of described shank is deltiod; described through hole is a mounting hole that runs through along the thickness direction of this shank head; correspondingly, described positioning convex has the waist drum type cross section suitable with the shape of described through hole.
3. the needle guard mechanisms of blood taking needle according to claim 1; it is characterized in that: described medicated cap body includes pedestal and is arranged on the support chip of these pedestal both sides symmetrically; described pedestal is connected the bottom of described medicated cap head and offers the breach that is connected with the groove of described medicated cap head; and the distance that the degree of depth of described medicated cap body and described sliding sleeve stretch out outside the housing is complementary.
4. the needle guard mechanisms of blood taking needle according to claim 3 is characterized in that: the outer wall of described support chip is provided with intilted inclined-plane in the position near the bottom.
5. according to the needle guard mechanisms of the described blood taking needle of arbitrary claim in the claim 1～4, it is characterized in that: described medicated cap head also is provided with reinforcement symmetrically in the both sides of described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201987424U CN201519196U (en) | 2009-10-22 | 2009-10-22 | Needle head protecting device of blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201987424U CN201519196U (en) | 2009-10-22 | 2009-10-22 | Needle head protecting device of blood taking needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201519196U true CN201519196U (en) | 2010-07-07 |
Family
ID=42505374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201987424U Expired - Fee Related CN201519196U (en) | 2009-10-22 | 2009-10-22 | Needle head protecting device of blood taking needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201519196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997965A (en) * | 2011-11-02 | 2014-08-20 | 林治远 | Surgically invasive pointed articles for skin penetration and methods for their preparation |
-
2009
- 2009-10-22 CN CN2009201987424U patent/CN201519196U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997965A (en) * | 2011-11-02 | 2014-08-20 | 林治远 | Surgically invasive pointed articles for skin penetration and methods for their preparation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20141022 |
|
| EXPY | Termination of patent right or utility model |