CN105105770A - Blood taking needle with blood return visible - Google Patents
Blood taking needle with blood return visible Download PDFInfo
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- CN105105770A CN105105770A CN201510623998.5A CN201510623998A CN105105770A CN 105105770 A CN105105770 A CN 105105770A CN 201510623998 A CN201510623998 A CN 201510623998A CN 105105770 A CN105105770 A CN 105105770A
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- 239000008280 blood Substances 0.000 title claims abstract description 161
- 210000004369 blood Anatomy 0.000 title claims abstract description 161
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000000007 visual effect Effects 0.000 claims description 83
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000010241 blood sampling Methods 0.000 claims description 12
- 230000006978 adaptation Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 7
- 241000219739 Lens Species 0.000 description 11
- 210000000695 crystalline len Anatomy 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 210000003462 vein Anatomy 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000017531 blood circulation Effects 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 210000005224 forefinger Anatomy 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
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Abstract
The invention relates to a blood taking needle with blood return visible. The blood taking needle comprises a blood taking needle tube, a puncture needle and a needle seat; the needle seat comprises a blood taking end and a puncture end, the blood taking needle tube is inserted into the blood taking end, and the puncture needle is inserted into the puncture end; a visible blood return cavity is formed in the needle seat, the blood taking needle tube and the puncture needle are both communicated with the visible blood return cavity, the needle seat comprises a needle seat main body with the visible blood return cavity, and the needle seat main body is integrally formed by the blood taking end and the puncture end; the side wall of the needle seat main body is provided with a demoulding window of which the position corresponds to that of the visible blood return cavity, the visible blood return cavity penetrates through the side wall of the needle seat main body through the demoulding window, and a sealing cover is arranged on the demoulding window in a covering mode. The blood taking needle has the advantages of being capable of saving used materials and lowering the cost and good in structural stability.
Description
Technical field
The present invention relates to technical field of medical instruments, specific design a kind of blood taking needle, particularly a kind of blood taking needle of visible blood-flow.
Background technology
Disposable lancet and single use human vein blood sample evacuated collection container support the use.Disposable lancet mainly comprises blood-collecting needle tube, puncture needle, and blood-collecting needle tube is connected with puncture needle by link.Puncture needle penetrates human vein blood sample evacuated collection container, and collection container is communicated with blood taking needle.Current blood taking needle divides and softly connects formula and firmly connect formula, wherein firmly connect formula blood taking needle, blood-collecting needle tube needle stand and puncture needle needle stand are directly connected to form, during use, getting a collection container stretches in holder by safety helmet end, and forefinger and middle finger block holder handle place thumb and prop up bottom container bottle, puncture needle are penetrated collection container plug, blood sucks collection container automatically, and in collection container, vacuum takes off blood taking needle from human body after disappearing completely.
The traditional formula that firmly connects blood taking needle, needle stand is that opaque plastics are made, when puncturing vein, blood back can not be observed, so can not judge whether to puncture successfully, inconvenient clinical manipulation, the patient being difficult to puncture for vein is all the more so, and frequent repeated localised puncture causes the misery of time waste and patient to increase.
The drawback of formula blood taking needle existence is firmly connect in order to solve tradition; The blood taking needle with visible blood-flow function has been in the news and has been used more widely.Existing visible blood-back blood taking needle adopts needle stand at least partly for transparent material makes and form watch window, needle stand is assembled into by blood-collecting needle tube needle stand and puncture needle needle stand, there is in needle stand the blood back cavity of certain volume, blood-collecting needle tube and puncture needle communicate with blood back cavity, after venipuncture success, blood can enter in blood back cavity, the blood back situation in blood back cavity is can be observed by watch window, whether be successfully convenient to observe blood sampling, improve the success rate of puncture, alleviate the misery of patient and the stress of medical personnel.But there is following defect in existing visible blood-back blood taking needle: the needle stand of blood taking needle is assembled after forming two individual components by take a blood sample end and cutting tip parts processing and formed, its assembling form has, the connecting end portion of blood sampling end and cutting tip all forms outside ring seat, two outside ring seats increase fitting area, then bonding one (China Patent No. as Weihai Hongyu Medical Devices Co., Ltd. is " a kind of visible blood-back blood taking needle " of CN201220210072.5, and mandate publication number is CN202604841U) is carried out through epoxide-resin glue; Also have adopt socket pipe carry out connecting (as, the China Patent No. of Hebei Xin Le Science and Technology Ltd. is " penholder type visible backflow blood taking needle " of 201120105709.X, mandate publication number is CN202086485U), under this structure, need to be processed to form the syndeton of being convenient to assemble specially at blood sampling end and cutting tip, add material usage, although for single blood taking needle, its material increases not obvious, and blood taking needle demand is large, during batch production, cost is obvious; And the needle stand that assembling is formed is lower at reliability of structure.
Summary of the invention
Objects of the present invention: for overcoming the defect that prior art exists, the invention provides the visible blood-back blood taking needle that a kind of needle stand adopts monoblock type machine-shaping, have to save and use material, reduce costs and advantage that Stability Analysis of Structures is good.
For achieving the above object, the invention provides following technical scheme: 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 in needle stand, blood-collecting needle tube and puncture needle are all communicated with visual blood back cavity, it is characterized in that: described needle stand comprises the needle hub body being with visual blood back cavity, needle hub body is by end and the cutting tip global formation of taking a blood sample, described needle hub body sidewall offers the demoulding window corresponding with visual blood back cavity position, visual blood back cavity runs through needle stand main body wall through demoulding window, demoulding window is covered with seal cover.
By adopting technique scheme, needle stand adopts and is designed by the needle hub body of blood sampling end and cutting tip global formation, global formation, solve traditional separable assembled to need reserved to form the many defects of material materials that syndeton causes, save materials cost, and integrally formed needle hub body structural strength and stability better, needle hub body designs the demoulding window of corresponding visual blood back cavity, namely visual blood back cavity side forms an opening, make the visual blood back cavity of molding on needle hub body convenient and reliable, be convenient to processing and forming and the demoulding of needle hub body, demoulding scuttle top cover labyrinth, visual blood back cavity is closed.
The present invention is set to further: described needle hub body sidewall is provided with the convex lens portions corresponding with visual blood back cavity position.
Under said structure design, convex lens portions has enlarging function, is convenient to the blood back situation of observing in visual blood back cavity, is convenient to medical worker and judges when operating, improve curative activity efficiency.
The present invention is set to further: the circumferential medial wall of described visual blood back cavity includes just to the cancave cambered surface of demoulding window, and the side grain to be connected with cancave cambered surface both sides, side grain extends towards demoulding window, it is U-shaped that corresponding described visual blood back cavity surrounds cross sectional shape through cancave cambered surface, two side grains, the lateral wall of needle hub body has the convex arc surface with described side grain corresponding matching, and convex arc surface coordinates with side grain and forms described convex lens portions.
Under said structure design, the cross sectional shape of visual blood back cavity is U-shaped, it is processed to form more simple and convenient, be convenient to the demoulding of needle hub body, and the side grain formed coordinates with the convex arc surface of needle hub body outer wall the convex lens portions being formed and have magnifying function, compact conformation, both met processing request, and the side grain skilfully using again formation reaches function optimization.
The present invention is set to further: described cancave cambered surface is 1/2nd circular arcs, and side grain is connected with cancave cambered surface is tangent.
Under said structure design, side grain is connected smooth-going with cancave cambered surface, surface smoothing, and needle stand intensity is better.
The present invention is set to further: corresponding described visual blood back cavity outer circumferential, described needle hub body position wall is circular arc, then the described convex arc surface of corresponding formation.
Under said structure design, corresponding described visual blood back cavity outer circumferential, needle hub body position wall is circular arc, then needle hub body outline is cylindrical, then naturally form described convex arc surface, easy to process, and the convex arc surface be processed to form is reliably more convenient with coordinating of side grain, two side grains are all to having convex arc surface, form two convex lenss, be more conducive to observing.
The present invention is set to further: described blood-collecting needle tube and puncture needle split design, for between the puncture needle plug-in opening inner port of puncture needle plug-in mounting and visual blood back cavity, there is entity portion, interval in cutting tip, the connecting through hole coaxial with puncture needle plug-in opening is provided with in entity portion, interval, connecting through hole external port and puncture needle are docked and connected, connecting through hole inner port and blood-collecting needle tube are docked and connected, corresponding connecting through hole external port position, entity portion, interval has the annular stop step surface stretched in puncture needle plug-in opening, puncture needle afterbody is conflicted spacing cooperation with annular stop step surface, corresponding connecting through hole inner port position, entity portion, interval has the spacing end face of blood-collecting needle tube, blood-collecting needle tube tail end to stretch in visual blood back cavity and conflicts spacing cooperation with the spacing end face of blood-collecting needle tube, entity portion, interval is provided with blood back breach, connecting through hole is communicated with visual blood back cavity through blood back breach.
Under said structure design, use to adapt to different crowd because blood-collecting needle tube has sizes specification, under blood-collecting needle tube and puncture needle split design, facilitate blood-collecting needle tube different size to design, and without the need to changing the size of puncture needle; There is entity portion, interval between puncture needle plug-in opening inner port and visual blood back cavity, connecting through hole in this entity portion, interval and blood back breach realize blood-collecting needle tube, puncture needle, visual blood back cavity to be interconnected, it is spacing that entity portion, interval realizes blood-collecting needle tube and puncture needle, facilitate blood-collecting needle tube, the plug-in mounting of puncture needle puts in place, assemble reliably more convenient, simple and compact for structure.
The present invention is set to further: the end face of described interval physical location in visual blood back cavity cross sectional shape is vertically step-like, in entity portion, interval, this step-like end face comprises tread, lower tread, and connect the tread joint face of upper tread and lower tread, the spacing end face of described blood-collecting needle tube is positioned on tread, described tread joint face is just to described demoulding window, tread joint face corresponds to described connecting through hole position, tread joint face is crossing with connecting through hole, and described connecting through hole is cut out described blood back breach towards demoulding window side by tread joint face.
Under said structure design, the end face of interval physical location in visual blood back cavity cross sectional shape is vertically step-like, namely an axial end face towards puncture needle of visual blood back cavity is step-like, connecting through hole is towards the corresponding blood back breach of the cut natural formation of one end sidewall of visual blood back cavity, simple and reliable for structure, visual blood back cavity " mouth is large, the end is little ", is convenient to the demoulding, is convenient to machine-shaping.
The present invention is set to further: described demoulding window border is greater than the radial opening of described visual blood back cavity, demoulding bottom of window forms positioning step, the radial opening of visual blood back cavity is rectangle, described seal cover comprises the outer cover plate of arch, outer cover plate is rectangular along the contour shape in its setting-in direction, corresponding demoulding window is the arch with outer cover plate adaptation, convex plug is provided with inside outer cover plate, convex plug is the rectangle with the radial opening adaptation of visual blood back cavity along the contour shape in its setting-in direction, outer cover plate is greater than convex plug and side edge thereof forms the position-limited edge coordinated with positioning step outside, outer cover plate is inlaid in demoulding window, position-limited edge is along coordinating with positioning step is spacing, convex plug embeds in the radial opening of visual blood back cavity.
Under said structure design, seal cover two parts jam-pack, sealing is reliable, and the outer cover plate of seal cover is arch, contour shape along its setting-in direction is rectangular, corresponding demoulding window is the arch with outer cover plate adaptation, and arch coordinates its edge jam-pack lower to coordinate reliable, and outer cover plate embeds after in demoulding window and coordinates more secure rigid, good airproof performance, and convex plug forms further location and sealing, has assembling solid and reliable, seals reliable advantage.
The present invention is set to further: described 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 reduces, and reduces costs.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
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 perspective view;
Fig. 5 is specific embodiment of the invention needle hub body front view;
Fig. 6 is along C-C line sectional view in Fig. 5;
Fig. 7 is along B-B line sectional view in Fig. 5;
Fig. 8 is specific embodiment of the invention sealing cover structure schematic diagram.
Detailed description of the invention
As shown in Figures 1 to 8, a kind of visible blood-back blood taking needle disclosed by the invention, include blood-collecting needle tube 1, puncture needle 2 and needle stand 3, puncture needle 2 there is sheath 4 by cover, needle stand 3 includes blood sampling end and cutting tip, blood-collecting needle tube 1 is inserted in blood sampling end, puncture needle 2 is inserted in cutting tip, visual blood back cavity 30 is provided with in needle stand 3, whole clearing material is adopted by needle stand to make, thus from outside visible inner chamber, form visual blood back cavity, also can transparent material be partly adopted to make, blood-collecting needle tube 1 and puncture needle 2 are all communicated with visual blood back cavity 30, described needle stand 3 comprises the needle hub body 31 being with visual blood back cavity 30, needle hub body 31 is by blood sampling end and cutting tip global formation, described needle hub body 31 sidewall offers the demoulding window 32 corresponding with visual blood back cavity 30 position, visual blood back cavity 30 runs through needle hub body 31 sidewall through demoulding window 32, demoulding window 32 is covered with seal cover 33.Needle stand adopts and is designed by the needle hub body of blood sampling end and cutting tip global formation, global formation, solve traditional separable assembled to need reserved to form the many defects of material materials that syndeton causes, in batch production process, greatly save materials cost, and integrally formed needle hub body structural strength and stability better, more convenient on assembling product, needle hub body designs the demoulding window of corresponding visual blood back cavity, namely visual blood back cavity side forms an opening, make the visual blood back cavity of molding on needle hub body convenient and reliable, be convenient to processing and forming and the demoulding of needle hub body, demoulding scuttle top cover labyrinth, visual blood back cavity is closed.
For improving the reliability of visible blood-flow, described needle hub body 31 sidewall is provided with the convex lens portions 311 corresponding with visual blood back cavity 30 position.Convex lens portions has enlarging function, is convenient to the blood back situation of observing in visual blood back cavity, is convenient to medical worker and judges when operating, improve curative activity efficiency.
And, in this specific embodiment, the circumferential medial wall of described visual blood back cavity 30 includes just to the cancave cambered surface 301 of demoulding window 32, and the side grain 302 to be connected with cancave cambered surface 301 both sides, side grain 302 extends towards demoulding window 32, it is U-shaped that corresponding described visual blood back cavity 30 surrounds cross sectional shape through cancave cambered surface 301, two side grain 302, the lateral wall of needle hub body 31 has the convex arc surface 312 with described side grain 302 corresponding matching, and convex arc surface 312 coordinates with side grain 302 and forms described convex lens portions 311.The cross sectional shape of visual blood back cavity is U-shaped, it is processed to form more simple and convenient, be convenient to the demoulding of needle hub body, and the side grain formed coordinates with the convex arc surface of needle hub body outer wall the convex lens portions being formed and have magnifying function, compact conformation, both met processing request, the side grain skilfully using again formation reaches function optimization.Described cancave cambered surface 301 is 1/2nd circular arcs, and side grain 302 is connected with cancave cambered surface 301 is tangent.Certainly, cancave cambered surface also can adopt multiple faceted pebble to surround, and side grain also can be crossing with cancave cambered surface, two side grains also can be uneven inclined-plane etc., but adopt the structural design of this specific embodiment, have side grain and are connected with cancave cambered surface smooth-going, surface smoothing, the better advantage of needle stand intensity.
For further facilitating machine-shaping, corresponding described visual blood back cavity 30 outer circumferential, described needle hub body 31 position wall is circular arc, then the described convex arc surface 312 of corresponding formation.Corresponding described visual blood back cavity outer circumferential, needle hub body position wall is circular arc, then needle hub body outline is cylindrical, it forms structure and is simply easy to processing, and visual blood back cavity circumferential side wall is the described convex arc surface of self-assembling formation, without the need to deliberately processing, easy to process, and the convex arc surface be processed to form is reliably more convenient with coordinating of side grain, two side grains, all to having convex arc surface, form two convex lenss, are more conducive to observing.
The thickness of its muscle arteries and veins blood vessel of usual different crowd is different, as adult's blood vessel is just thick than child, therefore for adapting to the use of different crowd, blood-collecting needle tube on blood taking needle has different model specification usually, and puncture needle corresponding be evacuated collection container, its size can be fixing, and for ease of under blood-collecting needle tube specifications vary, the specification of puncture needle can be constant.Described blood-collecting needle tube 1 designs with puncture needle 2 split, for between puncture needle plug-in opening 34 inner port of puncture needle 2 plug-in mounting and visual blood back cavity 30, there is entity portion, interval 35 in cutting tip, namely puncture needle 2 is not directly insert in visual blood back cavity 30, the connecting through hole 36 coaxial with puncture needle plug-in opening 34 is provided with in entity portion, interval 35, connecting through hole 36 external port (needs it is emphasized that described " external port " is the one end away from visual blood back cavity herein, corresponding connecting through hole is " inner port " near one end of visual blood back cavity) be docked and connected with puncture needle 2, connecting through hole 36 inner port and blood-collecting needle tube 1 are docked and connected, corresponding connecting through hole 36 external port position, entity portion, interval 35 has the annular stop step surface 351 stretched in puncture needle plug-in opening 34, puncture needle 2 afterbody is conflicted spacing cooperation with annular stop step surface 351, the plug-in mounting of puncture needle is convenient and reliable, corresponding connecting through hole 36 inner port position, entity portion, interval 35 has the spacing end face 352 of blood-collecting needle tube, blood-collecting needle tube 1 tail end to stretch in visual blood back cavity 30 and conflicts spacing cooperation with the spacing end face of blood-collecting needle tube 352, the plug-in mounting of blood-collecting needle tube is convenient and reliable, entity portion, interval 35 is provided with blood back breach 353, connecting through hole 36 is communicated with visual blood back cavity 30 through blood back breach 353.In this specific embodiment, by the aperture of connecting through hole for reducing design, the aperture of connecting through hole is less than the aperture of puncture needle plug-in opening, blood-collecting needle tube plug-in opening, such interval entity portion self-assembling formation corresponding annular stop step surface and the spacing end face of blood-collecting needle tube, structure is simple, convenient processing.Certainly as the scheme that the present invention is feasible, can directly directly insert in visual blood back cavity by puncture needle and blood-collecting needle tube, two needle tubings by virtue of experience can control insertion depth, there is the problem of assembling inconvenience; Also the location structure of the corresponding needle tubing of other Position Design can be adopted, but the advantage such as the structure of this specific embodiment is simple, easy to process, therefore the preferential structural design adopting this specific embodiment.
And, the end face cross sectional shape vertically that entity portion, described interval 35 is positioned at visual blood back cavity 30 is step-like, in entity portion, interval 35, this step-like end face comprises tread 354, lower tread 355, and connect the tread joint face 356 of upper tread 354 and lower tread 355, the spacing end face 352 of described blood-collecting needle tube is positioned on tread 354, described tread joint face 356 is just to described demoulding window 32, tread joint face 356 corresponds to described connecting through hole 36 position, tread joint face 356 is crossing with connecting through hole 36, and described connecting through hole 36 is cut out described blood back breach 353 towards demoulding window 32 side by tread joint face 356.Excise along tread joint face by this end face in entity portion, interval, the cavity that excision is formed and visual blood back cavity, demoulding window combine together, then form respective step shape, and at the side formation blood back breach of connecting through hole towards demoulding window, the formation of tread joint face can be plane, also can be arc surface etc.Under this design, visual blood back cavity " mouth is large, the end is little ", is convenient to the demoulding, is convenient to machine-shaping; And the position of blood back breach is corresponding to demoulding the window's position, at visual blood back cavity near demoulding window place, there is the convex lens portions formed through side grain, be convenient to observe blood back reliably.And described cancave cambered surface and upper tread just right, side grain and lower tread just right, cancave cambered surface is corresponding with tread joint face with the junction of side grain, and structure is more stable.Because the corresponding visual blood back cavity partial volume of needle stand is large, wall thickness is little, for improving its intensity, usually on the outer wall of needle stand 3 corresponding visual blood back cavity 30 position, arranges some reinforcements 313.
For making the sealing of seal cover to visual blood back cavity reliable, described demoulding window 32 frame is greater than the radial opening of described visual blood back cavity 30, positioning step 321 is formed bottom demoulding window 32, the radial opening of visual blood back cavity 30 is rectangle, look over towards demoulding window 32 like this, its shape is " returning " font, described seal cover 33 comprises the outer cover plate 331 of arch, outer cover plate 331 is rectangular along the contour shape in its setting-in direction, corresponding demoulding window 32 is the arch with outer cover plate 331 adaptation, convex plug 332 is provided with inside outer cover plate 331, convex plug 332 is the rectangle with the radial opening adaptation of visual blood back cavity 30 along the contour shape in its setting-in direction, outer cover plate 331 is greater than convex plug 332 and forms the position-limited edge coordinated with positioning step 321 at outer cover plate 331 edge, outer cover plate 331 is inlaid in demoulding window 32, position-limited edge is along coordinating with positioning step 321 is spacing, convex plug 332 embeds in the radial opening of visual blood back cavity 30.Seal cover two parts jam-pack, sealing is reliable, and the outer cover plate of seal cover is arch, and the contour shape along its setting-in direction is rectangular, corresponding demoulding window is the arch with outer cover plate adaptation, the sidewall junction of positioning step and demoulding window forms narrow and small gap, and outer cover plate edge jam-pack coordinates reliable, and outer cover plate embeds after in demoulding window and coordinates more secure rigid, good airproof performance, and convex plug forms further location and sealing, has assembling solid and reliable, seals reliable advantage.Be arch by described convex plug 332, the middle part of convex plug 332 is provided with material reducing groove 333.The material of convex plug reduces, and reduces costs.
Claims (9)
1. a 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 in needle stand, blood-collecting needle tube and puncture needle are all communicated with visual blood back cavity, it is characterized in that: described needle stand comprises the needle hub body being with visual blood back cavity, needle hub body is by end and the cutting tip global formation of taking a blood sample, described needle hub body sidewall offers the demoulding window corresponding with visual blood back cavity position, visual blood back cavity runs through needle stand main body wall through demoulding window, demoulding window is covered with seal cover.
2. visible blood-back blood taking needle according to claim 1, is characterized in that: described needle hub body sidewall is provided with the convex lens portions corresponding with visual blood back cavity position.
3. visible blood-back blood taking needle according to claim 2, it is characterized in that: the circumferential medial wall of described visual blood back cavity includes just to the cancave cambered surface of demoulding window, and the side grain to be connected with cancave cambered surface both sides, side grain extends towards demoulding window, it is U-shaped that corresponding described visual blood back cavity surrounds cross sectional shape through cancave cambered surface, two side grains, the lateral wall of needle hub body has the convex arc surface with described side grain corresponding matching, and convex arc surface coordinates with side grain and forms described convex lens portions.
4. visible blood-back blood taking needle according to claim 3, it is characterized in that: described cancave cambered surface is 1/2nd circular arcs, side grain is connected with cancave cambered surface is tangent.
5. visible blood-back blood taking needle according to claim 3 or 4, is characterized in that: corresponding described visual blood back cavity outer circumferential, described needle hub body position wall is circular arc, then the described convex arc surface of corresponding formation.
6. visible blood-back blood taking needle according to claim 1 or 2 or 3 or 4, it is characterized in that: described blood-collecting needle tube and puncture needle split design, for between the puncture needle plug-in opening inner port of puncture needle plug-in mounting and visual blood back cavity, there is entity portion, interval in cutting tip, the connecting through hole coaxial with puncture needle plug-in opening is provided with in entity portion, interval, connecting through hole external port and puncture needle are docked and connected, connecting through hole inner port and blood-collecting needle tube are docked and connected, corresponding connecting through hole external port position, entity portion, interval has the annular stop step surface stretched in puncture needle plug-in opening, puncture needle afterbody is conflicted spacing cooperation with annular stop step surface, corresponding connecting through hole inner port position, entity portion, interval has the spacing end face of blood-collecting needle tube, blood-collecting needle tube tail end to stretch in visual blood back cavity and conflicts spacing cooperation with the spacing end face of blood-collecting needle tube, entity portion, interval is provided with blood back breach, connecting through hole is communicated with visual blood back cavity through blood back breach.
7. visible blood-back blood taking needle according to claim 6, it is characterized in that: the end face of described interval physical location in visual blood back cavity cross sectional shape is vertically step-like, in entity portion, interval, this step-like end face comprises tread, lower tread, and connect the tread joint face of upper tread and lower tread, the spacing end face of described blood-collecting needle tube is positioned on tread, described tread joint face is just to described demoulding window, tread joint face corresponds to described connecting through hole position, tread joint face is crossing with connecting through hole, and described connecting through hole is cut out described blood back breach towards demoulding window side by tread joint face.
8. visible blood-back blood taking needle according to claim 1 or 3, it is characterized in that: described demoulding window border is greater than the radial opening of described visual blood back cavity, demoulding bottom of window forms positioning step, the radial opening of visual blood back cavity is rectangle, described seal cover comprises the outer cover plate of arch, outer cover plate is rectangular along the contour shape in its setting-in direction, convex plug is provided with inside outer cover plate, convex plug is the rectangle with the radial opening adaptation of visual blood back cavity along the contour shape in its setting-in direction, outer cover plate is greater than convex plug and side edge thereof forms the position-limited edge coordinated with positioning step outside, position-limited edge inward flange forms tip, outer cover plate is inlaid in demoulding window, position-limited edge is along coordinating with positioning step is spacing, convex plug embeds in the radial opening of visual blood back cavity.
9. visible blood-back blood taking needle according to claim 8, it is characterized in that: described convex plug is arch, the middle part of convex plug is provided with 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510623998.5A CN105105770B (en) | 2015-09-25 | 2015-09-25 | A kind of visible blood-back blood taking needle |
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| CN105105770A true CN105105770A (en) | 2015-12-02 |
| CN105105770B CN105105770B (en) | 2017-08-22 |
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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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| 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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| US5030207A (en) * | 1990-11-02 | 1991-07-09 | Becton, Dickinson And Company | Instantaneous vein entry indicator for intravenous needle |
| CN1744856A (en) * | 2003-01-06 | 2006-03-08 | 贝克顿·迪金森公司 | Flashback blood collection needle |
| US20070088229A1 (en) * | 2004-03-23 | 2007-04-19 | Safe-T Limited | Needle assembly for a blood 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 |
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| 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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| CN105105770B (en) | 2017-08-22 |
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