CN105105770B - A kind of visible blood-back blood taking needle - Google Patents
A kind of visible blood-back blood taking needle Download PDFInfo
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- CN105105770B CN105105770B CN201510623998.5A CN201510623998A CN105105770B CN 105105770 B CN105105770 B CN 105105770B CN 201510623998 A CN201510623998 A CN 201510623998A CN 105105770 B CN105105770 B CN 105105770B
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Abstract
The present invention relates to a kind of visible blood-back blood taking needle, include blood-collecting needle tube, puncture needle and needle stand, needle stand includes blood sampling end and cutting tip, blood-collecting needle tube is inserted in blood sampling end, puncture needle is inserted in cutting tip, visual blood back cavity is provided with needle stand, blood-collecting needle tube and puncture needle are connected with visual blood back cavity, needle stand includes the needle hub body with visual blood back cavity, needle hub body is by end and the cutting tip global formation of taking a blood sample, demoulding window corresponding with visual blood back cavity position is offered on the wall of the needle hub body side, visual blood back cavity runs through needle stand main body wall through being stripped window, closure is covered with demoulding window.There is the present invention saving to use material, reduce cost and the good advantage of Stability Analysis of Structures.
Description
Technical field
The present invention relates to technical field of medical instruments, a kind of specific design blood taking needle, particularly a kind of visible blood-back is adopted
Blood pin.
Background technology
Disposable lancet is supported the use with disposable human vein blood sample evacuated collection container.Disposably make
Mainly include blood-collecting needle tube, puncture needle with blood taking needle, blood-collecting needle tube is connected by connection member with puncture needle.Puncture needle penetrates people
Vena systemica blood sample evacuated collection container, makes collection container be connected with blood taking needle.Current blood taking needle point is soft to be connect formula and connects formula firmly, its
In connect formula blood taking needle firmly, blood-collecting needle tube needle stand is directly connected to be formed with puncture needle needle stand, in use, take a collection container will pacify
Full cap end is stretched into holder, and forefinger and middle finger block thumb at holder handle and prop up container bottle bottom, and puncture needle is penetrated
Collection container plug, blood is automatically drawn into vacuum in collection container, collection container and blood taking needle is removed from human body after being wholly absent.
Traditional connects formula blood taking needle firmly, and needle stand is made up of opaque plastics, when puncturing vein, it is impossible to it was observed that returning
Blood, so it cannot be determined whether puncturing successfully, it has not been convenient to which clinical manipulation, the patient for being difficult to puncture for vein is even more so, warp
Chang Fanfu, which is punctured, causes the time to waste the pain increase with patient.
The drawbacks of formula blood taking needle is present is connect in order to solve tradition firmly；Blood taking needle with visible blood-back function has been reported simultaneously
It is used more widely.Existing visible blood-back blood taking needle is made using needle stand at least partially transparent material and is formed watch window, pin
Seat is assembled into by blood-collecting needle tube needle stand with puncture needle needle stand, the blood back cavity in needle stand with certain volume, blood-collecting needle tube and puncture
Pin is communicated with blood back cavity, after venipuncture success, and blood can enter in blood back cavity, and blood back cavity can be observed by watch window
Interior blood back situation, is easy to whether observation blood sampling succeeds, and improves the success rate punctured, alleviates pain and the medical personnel of patient
Stress.But there is following defect in existing visible blood-back blood taking needle：The needle stand of blood taking needle is by end and the cutting tip split of taking a blood sample
Processing is formed to assemble after two individual components and formed, and its assembling form has, and the connection end of blood sampling end and cutting tip is respectively formed outer
Side ring seat, two outside ring seat increase fitting areas, then carries out bonding one through epoxide-resin glue（Such as the great space Medical treatment device in Weihai
The China Patent No. of tool Co., Ltd is CN201220210072.'s 5《A kind of visible blood-back blood taking needle》, authorize Publication No.
CN 202604841 U）；Also have and be attached using socket pipe（Such as, the China Patent No. of Hebei Xin Le Science and Technology Ltd.s is
201120105709. X's《Penholder type visible backflow blood taking needle》, authorize the U of Publication No. CN 202086485）, under the structure,
Need specially to process to form the attachment structure for being easy to assembling at blood sampling end and cutting tip, add material usage, although for list
Individual blood taking needle, its material increase is not obvious, but blood taking needle demand is big, and during batch production, cost is obvious；And assembling formation
Needle stand is relatively low in reliability of structure.
The content of the invention
Objects of the present invention：To overcome the defect that prior art is present, the present invention provides a kind of needle stand and uses monoblock type
The visible blood-back blood taking needle of machine-shaping, material is used with saving, reduces cost and the good advantage of Stability Analysis of Structures.
To achieve the above object, the invention provides following technical scheme：A kind of visible blood-back blood taking needle, includes blood sampling
Needle tubing, puncture needle and needle stand, needle stand include blood sampling end and cutting tip, and blood-collecting needle tube is inserted in blood sampling end, and puncture needle is inserted
In cutting tip, visual blood back cavity is provided with needle stand, blood-collecting needle tube and puncture needle are connected with visual blood back cavity, and its feature exists
In：Described needle stand includes the needle hub body with visual blood back cavity, and needle hub body is described by end and the cutting tip global formation of taking a blood sample
Demoulding window corresponding with visual blood back cavity position is offered on the wall of needle hub body side, visual blood back cavity is through being stripped window transfixion pin
Seat main body wall, closure is covered with demoulding window.
By using above-mentioned technical proposal, needle stand uses the needle hub body by take a blood sample end and cutting tip global formation to design,
Global formation, solving traditional separable assembled needs the reserved defect formed more than the material materials that attachment structure is caused, saves
Materials cost, and integrally formed needle hub body structural strength and stability are more preferably, correspondence are designed on needle hub body visual time
The demoulding window of haemocoele, you can form an opening regarding blood back cavity side so that visual blood back cavity side is molded on needle hub body
Just it is reliable, it is easy to processing and forming and the demoulding of needle hub body, is stripped scuttle top cover labyrinth, closes visual blood back cavity.
The present invention is further arranged to：Needle hub body side wall is provided with convex lens corresponding with visual blood back cavity position
Portion.
Under said structure design, convex lens portions have enlarging function, are easy to observe the blood back situation in visual blood back cavity, just
Judge when medical worker is in operation, improve curative activity efficiency.
The present invention is further arranged to：The circumferential madial wall of the visual blood back cavity includes the concave arc just to being stripped window
Face, and the side grain being connected with cancave cambered surface both sides, side grain is towards demoulding window extension, and the corresponding visual blood back cavity is through recessed
Cambered surface, two side grains surround cross sectional shape for U-shaped, have and the side grain corresponding matching on the lateral wall of needle hub body
Convex arc surface, convex arc surface cooperatively forms the convex lens portions with side grain.
Under said structure design, the cross sectional shape of visual blood back cavity is U-shaped, and it, which is processed, forms more simple and convenient, is easy to
The demoulding of needle hub body, and the convex arc surface of side grain and the needle hub body outer wall formed cooperatively formed with magnifying function
Convex lens portions, compact conformation both meets processing request, and the side grain that skilful use is formed again reaches function optimization.
The present invention is further arranged to：The cancave cambered surface is 1/2nd circular arcs, side grain and the tangent connection of cancave cambered surface.
Under said structure design, side grain is connected smooth-going with cancave cambered surface, and surface is smooth, and needle stand intensity is more preferable.
The present invention is further arranged to：The needle hub body position correspondence visual blood back cavity outer circumferential wall is circular arc
Shape, then be correspondingly formed the convex arc surface.
Under said structure design, the needle hub body position correspondence visual blood back cavity outer circumferential wall is circular arc, then pin
Seat main body outline is cylinder, then is naturally formed the convex arc surface, easy to process, and the convex arc surface that is formed of processing with
The cooperation of side grain is more convenient reliable, and two side grains to that should have convex arc surface, form two convex lens, is more beneficial for seeing
Examine.
The present invention is further arranged to：The blood-collecting needle tube is designed with puncture needle split, for puncture needle inserting in cutting tip
Puncture needle plug-in opening inner port and visual blood back cavity between have in interval entity portion, interval entity portion and be provided with slotting with puncture needle
The connection through hole of hole coaxially is filled, connection through hole external port is docked and connected with puncture needle, connection through hole inner port and blood-collecting needle tube pair
Lead in succession, interval entity portion correspondence connection through hole external port position has the annular stop step stretched into puncture needle plug-in opening
Face, punctures Aculeata and contradicts spacing cooperation, interval entity portion correspondence connection through hole inner port position tool with annular stop step surface
There is the spacing end face of blood-collecting needle tube, blood-collecting needle tube tail end stretches into visual blood back cavity and contradicts spacing match somebody with somebody with the spacing end face of blood-collecting needle tube
Close, blood back breach is provided with the entity portion of interval, connection through hole is connected through blood back breach with visual blood back cavity.
Under said structure design, because there is blood-collecting needle tube sizes specification to be used with adapting to different crowd, blood taking needle
Pipe is with puncture needle split design, facilitating blood-collecting needle tube different size to design, the size without changing puncture needle；In puncture needle
There is the connection through hole and blood back breach in interval entity portion, the interval entity portion between plug-in opening inner port and visual blood back cavity
Blood-collecting needle tube, puncture needle, visual blood back cavity are interconnected by realization, and interval entity portion realizes the limit to blood-collecting needle tube and puncture needle
Position, facilitate blood-collecting needle tube, puncture needle inserting in place, assemble it is more convenient reliable, it is simple and compact for structure.
The present invention is further arranged to：Section shape of the interval physical location in the end face in visual blood back cavity vertically
Shape is step-like, and the step-like end face includes upper tread, lower tread, and the upper tread of connection and lower tread in the entity portion of interval
Tread joint face, the spacing end face of blood-collecting needle tube is located on upper tread, and the tread joint face just to the demoulding window, is stepped on
Face joint face corresponds to the connection lead to the hole site, and tread joint face intersects with connecting through hole, and tread joint face is by the company
Connect hole and cut out the blood back breach towards demoulding window side.
Under said structure design, cross sectional shape of the interval physical location in the end face in visual blood back cavity vertically is step
Shape, you can regard blood back cavity is axially facing the end face of puncture needle to be step-like, connects through hole towards one end of visual blood back cavity
Side wall is removed and is naturally formed corresponding blood back breach, simple and reliable for structure, visual blood back cavity " mouth is big, bottom is small ", is easy to the demoulding,
It is easy to machine-shaping.
The present invention is further arranged to：The demoulding window border is more than the radial opening of the visual blood back cavity, the demoulding
Bottom of window formation positioning step, the radial opening of visual blood back cavity is rectangle, and the closure includes the outer cover plate of arch, outside
The contour shape that cover plate is embedded in direction along it is rectangular, and corresponding demoulding window is on the inside of the arch being adapted to outer cover plate, outer cover plate
Provided with convex plug, convex plug is in the rectangle being adapted to the radial opening of visual blood back cavity, outer cover plate along its contour shape for being embedded in direction
The position-limited edge coordinated more than convex plug and in the formation of outer side edge thereof with positioning step, outer cover plate is inlaid in demoulding window, spacing
In edge and the spacing cooperation of positioning step, the radial opening of the convex embedded visual blood back cavity of plug.
Under said structure design, closure two parts are stoppered, sealed reliable, and the outer cover plate of closure is arch, along it
The contour shape for being embedded in direction is rectangular, and corresponding demoulding window is the arch being adapted to outer cover plate, and arch coordinates its lower edge
Stopper cooperation reliable, it is rear in outer cover plate insertion demoulding window to coordinate more secure rigid, good airproof performance, and convex plug forms further
Positioning and sealing, with assemble solid and reliable, the advantage of sealed reliable.
The present invention is further arranged to：The convex plug is arch, and the middle part of convex plug is provided with material reducing groove.
Under said structure design, the material of convex plug is reduced, and reduces cost.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is specific embodiment of the invention visible blood-back blood taking needle three-dimensional view；
Fig. 2 is specific embodiment of the invention visible blood-back blood taking needle structural representation；
Fig. 3 is the part A partial enlarged view in Fig. 2；
Fig. 4 is specific embodiment of the invention needle hub body dimensional structure diagram；
Fig. 5 is specific embodiment of the invention needle hub body front view；
Fig. 6 is along line C-C sectional view in Fig. 5；
Fig. 7 is along line B-B sectional view in Fig. 5；
Fig. 8 is specific embodiment of the invention sealing cover structure schematic diagram.
Embodiment
As shown in Figures 1 to 8, a kind of visible blood-back blood taking needle disclosed by the invention, includes blood-collecting needle tube 1, puncture needle 2
And needle stand 3, by being cased with sheath 4 on puncture needle 2, needle stand 3 includes blood sampling end and cutting tip, and blood-collecting needle tube 1, which is inserted in, to be adopted
In blood end, puncture needle 2 is inserted in cutting tip, and visual blood back cavity 30 is provided with needle stand 3, and needle stand is used into whole clearing material system
Into so as to from outside visible inner chamber, form visual blood back cavity, partly can be also made of transparent material, blood-collecting needle tube 1 and wearing
Pricker 2 is connected with visual blood back cavity 30, and described needle stand 3 includes the needle hub body 31 with visual blood back cavity 30, needle hub body
31 offered on end and the cutting tip global formation of taking a blood sample, the side wall of needle hub body 31 it is corresponding with the visual position of blood back cavity 30
Window 32 is stripped, visual blood back cavity 30 runs through the side wall of needle hub body 31 through being stripped window 32, is covered with demoulding window 32 close
Capping 33.Needle stand uses the needle hub body by take a blood sample end and cutting tip global formation to design, and global formation solves traditional split
Assembling needs the reserved defect formed more than the material materials that attachment structure is caused, in batch production process, greatlys save use
Expect cost, and integrally formed needle hub body structural strength and stability are more preferably, more convenient on assembling product, needle hub body
The demoulding window of the visual blood back cavity of upper design correspondence, you can form an opening regarding blood back cavity side so that on needle hub body
It is molded that visual blood back cavity is convenient and reliable, is easy to processing and forming and the demoulding of needle hub body, is stripped scuttle top cover labyrinth, making can
Depending on blood back cavity closing.
To improve the reliability of visible blood-back, the side wall of needle hub body 31 is provided with corresponding with the visual position of blood back cavity 30
Convex lens portions 311.Convex lens portions have enlarging function, are easy to observe the blood back situation in visual blood back cavity, are easy to medical matters people
Member judges in operation, improves curative activity efficiency.
Moreover, in this specific embodiment, the circumferential madial wall of the visual blood back cavity 30 includes just to demoulding window
32 cancave cambered surface 301, and the side grain 302 being connected with the both sides of cancave cambered surface 301, side grain 302 extend towards demoulding window 32,
The corresponding visual blood back cavity 30 surrounds cross sectional shape for U-shaped through cancave cambered surface 301, two side grains 302, in the outer of needle hub body 31
There is the convex arc surface 312 with the corresponding matching of side grain 302, convex arc surface 312 is cooperatively formed with side grain 302 on the wall of side
The convex lens portions 311.The cross sectional shape of visual blood back cavity is U-shaped, and it, which is processed, forms more simple and convenient, is easy to needle hub body
The demoulding, and the convex arc surface of side grain and the needle hub body outer wall formed cooperatively forms the convex lens with magnifying function
Portion, compact conformation both meets processing request, and the side grain that skilful use is formed again reaches function optimization.The cancave cambered surface 301 is two points
One of circular arc, side grain 302 and the tangent connection of cancave cambered surface 301.Certainly, cancave cambered surface can also be surrounded using multiple faceted pebbles, side grain
Also it can intersect with cancave cambered surface, two side grains are alternatively not parallel inclined-plane etc., but using the structure design of this specific embodiment,
Smooth-going is connected with cancave cambered surface with side grain, surface is smooth, the more preferable advantage of needle stand intensity.
Facilitate machine-shaping, the position of the needle hub body 31 correspondence visual outer circumferential of blood back cavity 30 to be further
Wall is circular arc, then is correspondingly formed the convex arc surface 312.The needle hub body position correspondence visual blood back cavity outer circumferential wall
For circular arc, then needle hub body outline is cylinder, and its formation is simple in construction easy to process, and visual blood back cavity peripheral side
Wall is the convex arc surface of self-assembling formation, easy to process without deliberately processing, and the convex arc surface that processing is formed is with putting down
The cooperation of tangent plane is more convenient reliable, and two side grains to that should have convex arc surface, form two convex lens, is more beneficial for seeing
Examine.
The thickness difference of its tendon and vessel blood vessel of crowd is typically different, it is thicker than child if adult's blood vessel therefore different to adapt to
Blood-collecting needle tube on the use of crowd, blood taking needle generally has different model specification, and it is evacuated collection container that puncture needle is corresponding,
Its size can be to fix, for ease of under the change of blood-collecting needle tube specification, the specification of puncture needle can be constant.The blood-collecting needle tube 1 with
The split of puncture needle 2 is designed, between the inner port of puncture needle plug-in opening 34 and visual blood back cavity 30 that are inserted in cutting tip for puncture needle 2
With interval entity portion 35, i.e. puncture needle 2 is inserted directly into visual blood back cavity 30, is provided with and puncture in interval entity portion 35
The coaxial connection through hole 36 of pin plug-in opening 34, connects the external port of through hole 36（Need herein " external port " it is emphasized that described
For one end away from visual blood back cavity, corresponding connection through hole is " inner port " close to one end of visual blood back cavity）With 2 pairs of puncture needle
Lead in succession, the connection inner port of through hole 36 is docked and connected with blood-collecting needle tube 1, the correspondence connection through hole 36 external port position of interval entity portion 35
Put with the annular stop step surface 351 stretched into puncture needle plug-in opening 34, the afterbody of puncture needle 2 and annular stop step surface 351
Spacing cooperation is contradicted, the inserting of puncture needle is convenient and reliable, the correspondence connection through hole 36 inner port position of interval entity portion 35, which has, adopts
The spacing end face 352 of blood needle tubing, the tail end of blood-collecting needle tube 1 is stretched into visual blood back cavity 30 and contradicted with the spacing end face of blood-collecting needle tube 352
Spacing to coordinate, the inserting of blood-collecting needle tube is convenient and reliable, and blood back breach 353 is provided with interval entity portion 35, and connection through hole 36 is passed through
Blood back breach 353 is connected with visual blood back cavity 30.In this specific embodiment, the aperture for connecting through hole is designed to reduce, connection
The aperture of through hole is less than puncture needle plug-in opening, the aperture of blood-collecting needle tube plug-in opening, is spaced such that entity portion self-assembling formation is corresponding
Annular stop step surface and the spacing end face of blood-collecting needle tube, simple in construction, convenient processing.Certainly as the feasible scheme of the present invention,
Directly puncture needle and blood-collecting needle tube can be inserted directly into visual blood back cavity, two needle tubings can by virtue of experience control insertion deep
Degree, the problem of there is assembling inconvenience；Also the location structure of corresponding needle tubing can be designed using other positions, but this specific embodiment
It is simple in construction, the advantages of easy to process, therefore preferentially use the structure design of this specific embodiment.
Moreover, the cross sectional shape of end face vertically that the interval entity portion 35 is located in visual blood back cavity 30 is step
In shape, interval entity portion 35 the step-like end face include the upper tread 354 of upper tread 354, lower tread 355, and connection and under step on
The tread joint face 356 in face 355, the spacing end face 352 of blood-collecting needle tube is located on upper tread 354, the tread joint face 356
Just to the demoulding window 32, tread joint face 356 corresponds to connection through hole 36 position, and tread joint face 356 is with being connected
Through hole 36 intersects, and the connection through hole 36 is cut out the blood back breach by tread joint face 356 towards demoulding window 32 side
353.It will be spaced on the end face in entity portion along tread joint face and cut off, cut off the cavity formed and visual blood back cavity, take off
Mould window combines together, then forms respective step shape, and forms blood back breach in the side of connection through hole towards demoulding window,
The formation of tread joint face can be plane, or arc surface etc..Under the design, visual blood back cavity " mouth is big, bottom is small ",
It is easy to the demoulding, is easy to machine-shaping；And the position correspondence of blood back breach is in demoulding the window's position, in visual blood back cavity close to de-
At mould window, with the convex lens portions constituted through side grain, it is easy to reliably observe blood back.And the cancave cambered surface is with above stepping on
Face is just right, and side grain and lower tread are just right, and cancave cambered surface and the junction of side grain are corresponding with tread joint face, and structure is more steady
It is fixed.Because the visual blood back cavity partial volume of needle stand correspondence is big, wall thickness is small, to improve its intensity, is generally visually returned in the correspondence of needle stand 3
Some reinforcements 313 are set on the position outer wall of haemocoele 30.
To cause closure to the sealed reliable of visual blood back cavity, the frame of demoulding window 32 is more than the visual blood back
Positioning step 321 is formed on the radial opening of chamber 30, demoulding window 32 bottom, and the radial opening of visual blood back cavity 30 is rectangle, this
Sample is looked over towards demoulding window 32, and it is shaped as " returning " font；The closure 33 includes the outer cover plate 331 of arch, enclosing cover
The contour shape that plate 331 is embedded in direction along it is rectangular, and corresponding demoulding window 32 is the arch being adapted to outer cover plate 331, enclosing cover
The inner side of plate 331 is embedded in the contour shape in direction in the radial opening with visual blood back cavity 30 provided with convex plug 332, convex plug 332 along it
The rectangle of adaptation, outer cover plate 331 be more than it is convex plug 332 and the edge of outer cover plate 331 formation with positioning step 321 cooperation it is spacing
Side, outer cover plate 331 is inlaid in demoulding window 32, and position-limited edge edge and the spacing cooperation of positioning step 321, the convex insertion of plug 332 are visual
In the radial opening of blood back cavity 30.Closure two parts are stoppered, sealed reliable, and the outer cover plate of closure is arch, embedding along its
The contour shape for filling direction is rectangular, and corresponding demoulding window is the arch being adapted to outer cover plate, positioning step and demoulding window
Side wall junction form narrow and small gap, it is reliable that outer cover plate edge stoppers cooperation, in outer cover plate insertion demoulding window after coordinate
More secure rigid, good airproof performance, and convex fill in form further positioning and sealed, with solid and reliable, the sealed reliable of assembling
Advantage.It is arch by the convex plug 332, the middle part of convex plug 332 is provided with material reducing groove 333.The material of convex plug is reduced, and is reduced into
This.
Claims (7)
1. a kind of visible blood-back blood taking needle, includes blood-collecting needle tube, puncture needle and needle stand, needle stand includes blood sampling end and puncture
End, blood-collecting needle tube is inserted in blood sampling end, and puncture needle is inserted in cutting tip, and visual blood back cavity, blood-collecting needle tube are provided with needle stand
Connected with puncture needle with visual blood back cavity, it is characterised in that：Described needle stand includes the needle hub body with visual blood back cavity, pin
Seat main body offers corresponding with visual blood back cavity position on end and the cutting tip global formation of taking a blood sample, needle hub body side wall
Window is stripped, visual blood back cavity runs through needle stand main body wall through being stripped window, closure, the pin are covered with demoulding window
Seat main body wall is provided with convex lens portions corresponding with visual blood back cavity position, and the circumferential madial wall of the visual blood back cavity includes
Have just to the cancave cambered surface for being stripped window, and the side grain being connected with cancave cambered surface both sides, side grain extends towards demoulding window, phase
Answer the visual blood back cavity to surround cross sectional shape through cancave cambered surface, two side grains for U-shaped, have on the lateral wall of needle hub body with
The convex arc surface of the side grain corresponding matching, convex arc surface cooperatively forms the convex lens portions with side grain.
2. visible blood-back blood taking needle according to claim 1, it is characterised in that：The cancave cambered surface is 1/2nd circular arcs, is put down
Tangent plane and the tangent connection of cancave cambered surface.
3. visible blood-back blood taking needle according to claim 1 or claim 2, it is characterised in that：The needle hub body position correspondence is described
Visual blood back cavity outer circumferential wall is circular arc, then is correspondingly formed the convex arc surface.
4. visible blood-back blood taking needle according to claim 1 or claim 2, it is characterised in that：The blood-collecting needle tube and puncture needle split
There is interval entity portion between the puncture needle plug-in opening inner port inserted in design, cutting tip for puncture needle and visual blood back cavity,
It is spaced in entity portion provided with the connection through hole with puncture needle plug-in opening coaxially, connection through hole external port is docked and connected with puncture needle,
Connection through hole inner port is docked and connected with blood-collecting needle tube, and interval entity portion correspondence connection through hole external port position, which has, stretches into puncture
Annular stop step surface in pin plug-in opening, punctures Aculeata and contradicts spacing cooperation, interval entity portion with annular stop step surface
Correspondence connection through hole inner port position has the spacing end face of blood-collecting needle tube, and blood-collecting needle tube tail end is stretched into visual blood back cavity and with adopting
The spacing end face of blood needle tubing contradict it is spacing coordinate, be provided with blood back breach in the entity portion of interval, connection through hole through blood back breach with can
Depending on blood back cavity connection.
5. visible blood-back blood taking needle according to claim 4, it is characterised in that：The interval physical location is in visual blood back cavity
The cross sectional shape of interior end face vertically is step-like, and the step-like end face includes upper tread in the entity portion of interval, lower tread, with
And the tread joint face of the upper tread of connection and lower tread, the spacing end face of blood-collecting needle tube is on upper tread, and the tread connects
Junction is just to the demoulding window, and tread joint face corresponds to the connection lead to the hole site, and tread joint face is with being connected through hole phase
Hand over, and the connection through hole is cut out the blood back breach by tread joint face towards demoulding window side.
6. visible blood-back blood taking needle according to claim 1, it is characterised in that：The demoulding window border is more than described visual
The radial opening of blood back cavity, demoulding bottom of window formation positioning step, the radial opening of visual blood back cavity is rectangle, the sealing
Lid includes the outer cover plate of arch, and the contour shape that outer cover plate is embedded in direction along it is rectangular, and convex plug, convex plug are provided with the inside of outer cover plate
It is in the rectangle that be adapted to the radial opening of visual blood back cavity along its contour shape for being embedded in direction, outer cover plate is more than convex fill in and outside
The position-limited edge that side edge thereof formation coordinates with positioning step, position-limited edge inward flange formation tip, outer cover plate is inlaid in demoulding window
Interior, position-limited edge edge and the spacing cooperation of positioning step, convex plug are embedded in the radial opening of visual blood back cavity.
7. visible blood-back blood taking needle according to claim 6, it is characterised in that：The convex plug is to be set in the middle part of arch, convex plug
There is material reducing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623998.5A CN105105770B (en) | 2015-09-25 | 2015-09-25 | A kind of visible blood-back blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623998.5A CN105105770B (en) | 2015-09-25 | 2015-09-25 | A kind of visible blood-back blood taking needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105105770A CN105105770A (en) | 2015-12-02 |
| CN105105770B true CN105105770B (en) | 2017-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510623998.5A Active CN105105770B (en) | 2015-09-25 | 2015-09-25 | A kind of visible blood-back blood taking needle |
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| US5030207A (en) * | 1990-11-02 | 1991-07-09 | Becton, Dickinson And Company | Instantaneous vein entry indicator for intravenous needle |
| US6712792B2 (en) * | 2001-05-02 | 2004-03-30 | Becton, Dickinson And Company | Flashback blood collection needle |
| GB0406438D0 (en) * | 2004-03-23 | 2004-04-28 | Safe T Ltd | A needle assembly for a body fluids sampling device |
| CN2857819Y (en) * | 2005-06-27 | 2007-01-17 | 浙江康康医疗器械有限公司 | Returning blood visible blood taking needle |
| CN201564487U (en) * | 2009-12-23 | 2010-09-01 | 浙江康德莱医疗器械股份有限公司 | Blood returning type blood taking needle |
| CN202699152U (en) * | 2012-06-18 | 2013-01-30 | 上海达美医用塑料厂 | Structure of blood taking needle capable of being used to observe blood |
| CN202982018U (en) * | 2012-12-31 | 2013-06-12 | 河北鑫乐科技有限公司 | Blood taking needle enabling user to see return blood |
| CN204971325U (en) * | 2015-09-25 | 2016-01-20 | 温州京环科技有限公司 | Returning blood visible blood taking needle |
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- 2015-09-25 CN CN201510623998.5A patent/CN105105770B/en active Active
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| CN105105770A (en) | 2015-12-02 |
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