CN201370587Y - Blood sampling needle - Google Patents
Blood sampling needle Download PDFInfo
- Publication number
- CN201370587Y CN201370587Y CN200920145910U CN200920145910U CN201370587Y CN 201370587 Y CN201370587 Y CN 201370587Y CN 200920145910 U CN200920145910 U CN 200920145910U CN 200920145910 U CN200920145910 U CN 200920145910U CN 201370587 Y CN201370587 Y CN 201370587Y
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- housing
- closing member
- nook closing
- core body
- arm
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Abstract
The utility model discloses a blood sampling needle, comprising a shell having a needle outlet hole in a front end, a needle core and a spring, wherein one side of the shell is provided with an ejection structure that ejects the needle core from a standby state; the shell in the opposite side of the ejection structure is provided with an elastic clamping piece that internally and backwardly extends for blocking the needle core; the ejection structure penetrates through the shell cavity to extend to the free end of the elastic clamping piece in the opposite side to press down the elastic clamping piece; the front end of the needle core has a needle cap that extends out from the needle outlet hole of the shell and that is able to push the needle core from the natural state to the standby state of blocking the needle core by the elastic clamping piece. The utility model solves the default that the existing disposable blood sampling needle is easy to cause error operation and the blood sampling needle is easy to scrap by triggering button because the needle sampling needle is always in the standby state before use. The utility model is simply structured and easy to operate.
Description
Technical field
This utility model relates to disposable medical safety automatic blood-taking needle, is specifically related to a kind of self-destruction type blood taking needle.
Background technology
The form of existing medical blood-sampling needle is varied, and most blood taking needle structures are small and exquisite, easy to use, but can not guarantee disposable use.For can being reached, blood taking needle avoids reusable effect, thoroughly eliminate safe hidden trouble, a lot of relevant disposable breaking-up function blood taking needles that have are developed out in succession, for example: the patent No. is that No. 02221043.1 utility model patent discloses a kind of damage type disposable safe automatic blood-taking needle, penetrate in the structure at the card of this blood taking needle, utilize inclined-plane and flexible clamping on the stopper to touch the cross component force that is produced, the elasticity card is broken off relations, the indentation, there destructiveness that forces elasticity to be stuck in root on the other hand fractures, thereby the realization primary emission, expendable purpose.Therefore, the card of this blood taking needle is penetrated structure and can only disposablely be used, and has thoroughly got rid of the possibility that reuses.
The ZL03221812.5 utility model patent discloses a kind of self-destruction type disposable safe automatic blood-taking needle, and it comprises: housing, nook closing member and spring, housing constitutes an ejection chamber.Nook closing member and case side are penetrated structure to be provided with card on the spring compressed path, this card is penetrated structure and is made of the elastic arm that elastic arm button that extends laterally at housing and nook closing member extend laterally, elastic arm button effect end face is to lock hole set on the housing sidewall, elastic arm is not held under lock-out state and is cooperated with lock hole, and the elastic arm root is provided with the otch that is easy to generate stress concentration or shrinks neck.In use, press the elastic arm button, elastic arm is not held with lock hole from lock hole, broken away from, thereby make nook closing member under the elastic force effect of spring, launch out blood taking needle, simultaneously, in the otch or the fracture of contraction neck of elastic arm root, penetrate structure thereby damage card, make it and can not utilize again.But, because the elastic arm button that is used to block the elastic arm of nook closing member and is used to launch all is located at the structural limitations of a side of housing, be that the end of elastic arm must stretch out cavity and could be pinned by the locking on the housing is empty, under user mode not, the edgewise elastic arm of nook closing member is always in lock hole, just, it is in arm-to-arm always, therefore, the assembly crewman is in dress box process, in the transportation and before medical worker's use, and all might cause it to scrap by the elastic arm button can not use by mistake.Simultaneously, be provided with guiding rib and gathering sill between nook closing member and the inner walls, thereby increased the complexity of the structure of this blood taking needle, make it to increase the complexity of technology and mould at injection moulding process.
Therefore, a kind of blood taking needle that can overcome the fault of construction of above-mentioned blood taking needle becomes the target that those skilled in the art pursue.
Summary of the invention
The purpose of this utility model is to solve existing disposable blood taking needle and is in arm-to-arm before use all the time, easily causes maloperation, and trigger button, thereby the defective that blood taking needle is scrapped.Simultaneously, the nook closing member internal structure complexity that solves existing blood taking needle need add the defective of guiding mechanism.
For achieving the above object, the technical solution of the utility model is: a kind of blood taking needle, and it comprises: front end has the housing of needle outlet, is located at the intravital nook closing member of shell, is used for nook closing member is connected in the spring of rear end in the housing; It is characterized in that: be provided with in a side of described housing and be used for ejection structure that nook closing member is launched from arm-to-arm; On the housing of described ejection structure opposite side, be provided with inwardly and extend back, be used for the elastic card of clamping stagnation nook closing member; Described ejection structure passes the free end that the housing inner chamber extends to the elastic card of opposite side, is used to press elastic card; Described nook closing member front end has the pin medicated cap that stretches out, can promote the arm-to-arm of nook closing member from naturalness to elastic card clamping stagnation nook closing member from the needle outlet of housing.
As preferably, described nook closing member rear portion is that core body, pin are installed in the core body and front end stretches out, the pin cap sleeve be located on the pin and with the core body front end a little less than be connected; Below described core body, be provided with the draw-in groove or the convex shoulder that are used to receive described elastic card end.Described " weak connection " is meant: the junction of pin medicated cap and core body can make the operator with hand-power both be separated for point is connected or has the contraction neck.The below of core body is provided with draw-in groove or convex shoulder, can make things convenient for the clamping stagnation of elastic card.
As preferably: described ejection structure comprises: be located at one above the housing and launch mouth, the leading edge that an elastic arm launches mouthful from housing extends back and exceeds the upper surface of housing, at the terminal one-body molded pressing lever that downward extension is arranged of elastic arm; The lower end of described pressing lever extends to described elastic card place.Adopt the structure of integrated pressing lever and elastic arm, can conveniently launch, and simple in structure.
As optimal way: the position of launching mouthful opposite side at described housing is provided with bayonet socket, and described elastic card extends in housing from the leading edge of the bayonet socket of lower house and is obliquely installed.Elastic card is used to block draw-in groove or convex shoulder on the core body lower surface, makes nook closing member compression spring and is in arm-to-arm.Elastic card is located at the bayonet socket place, pressing lever is pushed after, elastic card has more spacious space to make a concession, and carries out so that launch more successfully.
In order to make core body smooth and easy to the sliding process of arm-to-arm by naturalness, wherein: the lower surface at the draw-in groove of described core body or convex shoulder rear portion is acclivitous inclined-plane from front to back.
As preferably, best described core body roughly is tabular ground, vertically is located at the intracavity of housing; Described pressing lever is two, and is crossed on the both sides of described core body.Core body slides between two pressing levers, and pressing lever has the effect of guiding simultaneously.
Preferred as another kind, the front end of the core body of described nook closing member is provided with a guide plate perpendicular to direction of ejection, and the cross section of the cavity that this guide plate and described housing surround is adaptive.
As preferably, the trailing edge that launches mouthful of described housing has a sweptback inclined-plane; The rear end of the upper surface of described core body has one and is used to make core body to launch the back can be stuck in the place, inclined-plane of launching mouth of described housing at the spring return force function the card thorn portion that is upturned.After nook closing member is launched, under the elastic force effect of spring, after pin is ejected, under the elastic force effect of spring, nook closing member is pulled rearward moving, and the card thorn portion above the nook closing member just snaps into the place, inclined-plane of launching mouthful trailing edge, thereby make nook closing member can not spring back to arm-to-arm, therefore, avoided repeated use.
As preferably: the root that described elastic arm is connected with housing and/or launch the root that card is connected with housing and have the neck of contraction or otch.Shrink neck or being provided with of otch and can once damage elastic arm or launch card, thereby more guarantee nonrecoverable purpose.
Wherein: described housing comprises upper and lower casing, and both snap together by alignment pin and locating hole.Housing adopts the structure of split up and down conveniently to install, and also can adopt the form of rear end cap certainly.The structure of the front end of this hour hands medicated cap needs and can get final product from preceding assembling in the housing.
This utility model is owing to adopt technique scheme, be about to the side that ejection structure is located at housing, prefabricated relative opposite side inwardly is provided with and the elastic card that extends back, elastic card is used for the clamping stagnation nook closing member, because elastic card is to extend in the cavity of housing and block nook closing member, ejection structure passes the free end that the housing inner chamber extends to the elastic card of opposite side, is used to press elastic card; Therefore, press ejection structure downwards and both can promote elastic card, nook closing member is ejected, and the pin medicated cap of nook closing member front end, stretch out, therefore, promote the pin medicated cap and can make nook closing member from naturalness to the arm-to-arm from the needle outlet of housing.In prior art: the elastic arm that is used for the clamping stagnation nook closing member is provided in a side of nook closing member, the lock hole that is stuck on the housing wall by elastic arm blocks, and therefore, nook closing member can not be realized the variation from naturalness to the arm-to-arm, just, this blood taking needle can only remain on arm-to-arm.Therefore, blood taking needle of the present utility model can be finished the conversion of nook closing member from naturalness (assembling back) to arm-to-arm and emission state.Thereby overcome existing blood taking needle and easily triggered the defective of scrapping by maloperation.
The blood taking needle of the present utility model further pressing lever of ejection structure is set to two, and be crossed on the both sides of nook closing member, guiding when being used for the nook closing member emission is if only lead with pressing lever, then pressing lever should have enough width on nook closing member mobile square, to guarantee guide effect.This utility model also can further be set up the guide plate that mates with the housing cavity shape at the core body front end, cooperates guiding jointly with pressing lever, and it does not need pressing lever to have enough width.This structure is compared with existing blood taking needle guiding mechanism, and is simple in structure, need not to establish guiding rib or gathering sill in housing, made things convenient for the processing and manufacturing of blood taking needle.
Description of drawings
Fig. 1 is a blood taking needle of the present utility model, is in the cutaway view that the back state is installed;
Fig. 2 is a blood taking needle of the present utility model, is in the cutaway view of arm-to-arm;
Fig. 3 is a blood taking needle of the present utility model, is in the cutaway view of emission state;
Fig. 4 is a blood taking needle of the present utility model, the cutaway view of emission back state;
Fig. 5 is the vertical view that blood taking needle of the present utility model removes upper shell;
Fig. 6 is the cutaway view of the emission state of another embodiment of blood taking needle of the present utility model.
Wherein figure number is:
Housing 1 upper shell 11 lower houses 12 alignment pins 13
Inclined-plane 215 handles, 231 ejection structures 110 launch mouth 111
The specific embodiment
Show referring to Fig. 1-5, showed a kind of blood taking needle of the present utility model among the figure, what Fig. 1 showed is that blood taking needle is assembled the naturalness after finishing, and it comprises: housing 1, nook closing member 2 and spring 3.Housing 1 front end has needle outlet 15, and nook closing member 2 is located in the housing 1, and nook closing member 2 is connected in the rear end of housing 1 by spring 3.Housing 1 is made of upper shell 11 and lower house 12, and both snap together by alignment pin 13 (as shown in Figure 5) and the locating hole (not shown) that is located at both butting surfaces respectively; Upper shell 11 and lower house 12 surround a cavity 16 that is used to hold nook closing member 2; Cavity 16 is rectangular-shaped.Upside at housing 1 is provided with ejection structure 110, inwardly is provided with and the elastic card 122 that extends back at the correspondence position of the housing 1 of ejection structure 110 opposite sides, and elastic card 122 is used for clamping stagnation nook closing member 2; Ejection structure 110 passes the free end that housing 1 inner chamber body 16 extends to the elastic card 122 of opposite side, and ejection structure 110 is used to press elastic card 122 nook closing member 2 is launched from arm-to-arm; The front end of nook closing member 2 has pin medicated cap 23, and pin medicated cap 23 stretches out from the needle outlet 15 of housing 1, and it is used to promote the arm-to-arm (showing as Fig. 2) of nook closing member 2 122 clamping stagnation nook closing members 2 from naturalness to the elastic card.
Nook closing member 2 comprises core body 21, pin 22 and pin medicated cap 23.Core body 21 is positioned at the rear portion of nook closing member 2, is used to support pin 22 and connects spring 3, and pin medicated cap 23 is at the front end of core body 21 and be placed on the needle point, and pin medicated cap 23 is protected pin 22 on the one hand, is used to promote nook closing member 2 on the other hand and makes it from naturalness to the arm-to-arm; Pin medicated cap 23 is connected as a single entity with the front end of core body 21 with being little connection status, described little connection is meant: be provided with between pin medicated cap 23 and core body 21 and be easy to make both isolating contraction necks 24, also can be provided with otch or both is isolating point and connects, in a word, make it under the pulling force effect of operator's hands, can pull up pin medicated cap 23.The afterbody of core body 21 is and the connecting portion 211 of spring 4 that the needle outlet 15 that the front end of pin medicated cap 23 passes housing 1 stretches out outside the housing 1, and is provided with handle 231 at leading section, and is hand-held for the operator.Below core body 21, be provided with the draw-in groove 213 that is used to receive described elastic card 122 ends, also can directly make elastic card 122 ends directly be stuck in the end of core body 21.Since elastic card 122 be from the wall of housing 1 in housing and extend back and be provided with, and the draw-in groove 213 of inner core-body 21 sunken insides is set on the nook closing member 2, therefore, nook closing member 2 can be interior by moving behind the forward direction from housing 1, both can realize that nook closing member moved to arm-to-arm from naturalness.Be that blood taking needle of the present utility model can naturalness assemble, again nook closing member be pushed into arm-to-arm during use.
Wherein, ejection structure 110 comprises: be located at one above the housing 1 and launch mouthful 111, one elastic arms 112 and launch the upper surface that mouthfuls 111 leading edge extends back and exceeds housing 1 from housing, at the terminal one-body molded pressing lever 113 that downward extension is arranged of elastic arm 112; The lower end of pressing lever 113 extends to described elastic card 122 places.Accordingly, be provided with bayonet socket 121 in the position of launching mouthful 111 opposite sides of described housing 1, described elastic card 122 extends in housing 1 from the leading edge of the bayonet socket 121 of housing 1 and is obliquely installed.When nook closing member 2 is in arm-to-arm, launches the draw-in groove 213 that card 122 is used to block nook closing member 2 lower surfaces, thereby make spring 3 be in compressive state.
In the present embodiment, core body 21 be shaped as roughly lamellar, vertically be located at upper and lower casing 11,12 middle positions, adopting flaky purpose is the both sides of core body 21 to be had living space hold ejection structure 110; Preferably pressing lever 113 is two and is crossed on the both sides of core body 21 and extends to the free end that launches card 122 1221 on the described lower house 12, thereby core body 21 and pressing lever 11 are play the guiding role.Obviously, pressing lever 113 also can be one, is located at a side of core body 21, but selects for use two to be best mode, and its guide effect is better.
The front end of the core body 21 of nook closing member 2 further is provided with a guide plate 212 perpendicular to direction of ejection, and this guide plate 212 is adaptive with the cross section of the cavity 16 that described housing 1 surrounds.
For nook closing member 2 can be moved to arm-to-arm from naturalness swimmingly, be acclivitous inclined-plane 215 from front to back at the lower surface at draw-in groove 213 rear portions of described core body 21.
Referring to Fig. 1, Fig. 3, the trailing edge that launches mouth 111 of described housing 1 has a sweptback inclined-plane 114; The rear end of the upper surface of described core body 21 has one and is used to make core body 21 to launch the back can be stuck in 114 places, inclined-plane of launching mouth 111 of described housing 1 at spring 3 return force functions the card thorn portion 214 that is upturned.What show among Fig. 3 is after launching, and nook closing member 2 is under the meeting elastic force effect of spring, and the card thorn portion 214 that is upturned on its top is stuck in 114 places, inclined-plane of launching mouth 111, so that nook closing member 2 can not be returned to emission state.
The use of this utility model blood taking needle is: the naturalness after the blood taking needle assembling is state shown in Figure 1, when desire is used, inwardly promote pin medicated cap 23, nook closing member 2 to the draw-in groove 213 of its underpart is blocked by the elastic card on the housing 1 122, spring 3 is in compressive state, as shown in Figure 2, at this moment, blood taking needle is in arm-to-arm.Pull up pin medicated cap 23, press the elastic arm 112 of ejection structure 110, the pressing lever 113 of its end promotes elastic card 122, elastic card 122 is deviate from from draw-in groove 213, as shown in Figure 3, under the elastic force effect of spring 3, nook closing member 2 is emitted, pin 22 stretches out from the needle outlet of housing 1 end, finish the function of prick skin, simultaneously, under the resilience force effect of spring, nook closing member is regained backward, at this moment, as shown in Figure 4, its card thorn portion 214 that is upturned that is located at core body 21 upper surface rear portions just is stuck in the inclined-plane 114 that launches mouthful 111 trailing edge places of housing 1, thereby, make nook closing member 2 can not spring back to the position of emission state once more.
Referring to Fig. 6, showed a kind of blood taking needle of the present utility model among the figure, with a last embodiment difference be: the structure of avoiding blood taking needle to reuse is: have otch 1121 at elastic arm 112 with the root that the upper shell 11 of housing 1 is connected; Also can adopt launching card 122 and have otch 1221 with the root that the lower house 11 of housing 1 is connected; Obviously, otch 1121 and otch 1221 can replace with necking down, and promptly sectional area herein reduces, so that can rupture under external force.Another difference is: the draw-in groove 213 that being used among the last embodiment blocked nook closing member 1 replaces with convex shoulder 213 ', and simultaneously, the lower surface of convex shoulder 213 ' back still is that inclined-plane 215 is to make things convenient for the promotion of nook closing member from naturalness to the arm-to-arm.
Claims (10)
1. blood taking needle, it comprises: front end has the housing (1) of needle outlet (15), is located at the nook closing member (2) in the housing (1), is used for nook closing member (2) is connected in the spring (3) of rear end in the housing; It is characterized in that: be provided with in a side of described housing (1) and be used for ejection structure (110) that nook closing member (2) is launched from arm-to-arm; On the housing (1) of described ejection structure (110) opposite side, be provided with inwardly and extend back, be used for the elastic card (122) of clamping stagnation nook closing member (2); Described ejection structure (110) passes the free end that housing (1) inner chamber extends to the elastic card (122) of opposite side, is used to press elastic card (122); Described nook closing member (2) front end has the pin medicated cap (23) that needle outlet (15) from housing (1) stretches out, can promote nook closing member (2) arm-to-arm of (122) clamping stagnation nook closing member (2) from naturalness to the elastic card.
2. blood taking needle according to claim 1 is characterized in that: described nook closing member (2) rear portion is that core body (21), pin (22) are installed in the core body (21) and front end stretches out, and pin medicated cap (23) is set in pin (22) and upward and with core body (21) front end is weak is connected; Be provided with draw-in groove (213) or the convex shoulder (213 ') that is used to receive described elastic card (122) end in the below of described core body (21).
3. blood taking needle according to claim 1 and 2, it is characterized in that: described ejection structure (110) comprising: be located at one above the housing (1) and launch mouthful (111), the leading edge that one elastic arm (112) launches mouthful (111) from housing extends back and exceeds the upper surface of housing (1), at the terminal one-body molded pressing lever (113) that downward extension is arranged of elastic arm (112); The lower end of described pressing lever (113) extends to described elastic card (122) and locates.
4. blood taking needle according to claim 3, it is characterized in that: launch mouthfuls 111 at described housing (1)) position of opposite side is provided with bayonet socket (121), described elastic card (122) is from the bayonet socket 121 of lower house (12)) leading edge in housing (1), extend and be obliquely installed.
5. blood taking needle according to claim 2 is characterized in that: the draw-in groove (213) of described core body (21) or the lower surface at convex shoulder (213 ') rear portion are acclivitous inclined-plane (215) from front to back.
6. blood taking needle according to claim 2 is characterized in that: described core body (21) roughly is the intracavity that tabularly, vertically is located at housing (1); Described pressing lever (113) is two and is crossed on the both sides of described core body (21).
7. blood taking needle according to claim 6 is characterized in that: the front end of the core body (21) of described nook closing member (2) is provided with a guide plate perpendicular to direction of ejection (212), and this guide plate (212) is adaptive with the cross section of the cavity that described housing (1) surrounds.
8. blood taking needle according to claim 3 is characterized in that: the trailing edge that launches mouthful (111) of described housing (1) has a sweptback inclined-plane (114); The rear end of the upper surface of described core body (21) has one and is used to make core body (21) to launch the back can be stuck in the card thorn portion (214) that is upturned that the inclined-plane (114) that launches mouthful (111) of described housing (1) is located at spring (3) return force function.
9. blood taking needle according to claim 3 is characterized in that: the root that described elastic arm (112) is connected with housing (1) and/or launch the root that card (122) is connected with housing (1) and have the neck of contraction or otch.
10. blood taking needle according to claim 1 and 2 is characterized in that: described housing (1) comprises upper and lower casing (11), (12), and both snap together by alignment pin (13) and locating hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920145910U CN201370587Y (en) | 2009-03-23 | 2009-03-23 | Blood sampling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920145910U CN201370587Y (en) | 2009-03-23 | 2009-03-23 | Blood sampling needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201370587Y true CN201370587Y (en) | 2009-12-30 |
Family
ID=41496667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920145910U Expired - Lifetime CN201370587Y (en) | 2009-03-23 | 2009-03-23 | Blood sampling needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201370587Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102613976A (en) * | 2012-04-13 | 2012-08-01 | 江苏健裕健康医疗器械有限公司 | One-piece type welding-fixation disposal blood taking needle |
| CN103300868A (en) * | 2013-07-02 | 2013-09-18 | 苏州施莱医疗器械有限公司 | Blood sampling device with buffer device |
| CN103997965A (en) * | 2011-11-02 | 2014-08-20 | 林治远 | Surgically invasive pointed articles for skin penetration and methods for their preparation |
| CN111840699A (en) * | 2020-06-08 | 2020-10-30 | 江苏康宝医疗器械有限公司 | Ejection type safety intravenous needle and use method thereof |
-
2009
- 2009-03-23 CN CN200920145910U patent/CN201370587Y/en not_active Expired - Lifetime
Cited By (4)
| 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 |
| CN102613976A (en) * | 2012-04-13 | 2012-08-01 | 江苏健裕健康医疗器械有限公司 | One-piece type welding-fixation disposal blood taking needle |
| CN103300868A (en) * | 2013-07-02 | 2013-09-18 | 苏州施莱医疗器械有限公司 | Blood sampling device with buffer device |
| CN111840699A (en) * | 2020-06-08 | 2020-10-30 | 江苏康宝医疗器械有限公司 | Ejection type safety intravenous needle and use method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |
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| CX01 | Expiry of patent term |