CN104127191B - Safe blood-taking needle - Google Patents
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- CN104127191B CN104127191B CN201410397910.8A CN201410397910A CN104127191B CN 104127191 B CN104127191 B CN 104127191B CN 201410397910 A CN201410397910 A CN 201410397910A CN 104127191 B CN104127191 B CN 104127191B
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Abstract
The application relates to field of medical products, in particular to a kind of safe blood-taking needle.Comprise needle tubing, needle stand and urceolus; The head of urceolus is provided with surge motion control assembly; Needle stand comprises the blood back form be made up of transparent material, axial screens body and radial limit body; Blood back form is arranged on the afterbody of radial limit body, and axial screens body is arranged on the lateral wall of blood back form; Needle tubing passes blood back form and is fixedly connected with it; The needle tubing part be positioned within blood back form is provided with blood outlet; One end of blood back form and needle tubing can be passed by the head of urceolus and surge motion control assembly, and one end that needle tubing stretches out urceolus is provided with the cutting edge of inclination; The tail inner side of urceolus is provided with screens assembly.Safe blood-taking needle provided by the present invention can make needle tubing can stretch out the head of urceolus in use, and with within urceolus of can retracting after finishing using; Meanwhile, medical personnel can observe blood back situation by blood back form again.
Description
Technical field
The application relates to field of medical products, in particular to a kind of safe blood-taking needle.
Background technology
Usually following three kinds of approach are had: (1) subcutaneous blood sampling: be used for detecting the differential counting of blood cell component to the collection of blood preparation; Many uses subcutaneous (real core or prismatic needle point) blood taking needle; (2), venous blood collection: for carrying out detailed detection to blood cytology, nosetiology, immunology, hereditism and other related discipline indexs, very wide in clinical middle application, use pen type, split type vein (hollow) blood taking needle or syringe more; (3), arterial blood drawing, how detect aterial blood gas indexes following in critical emergency case, apply less, arterial blood drawing perforator (band pin) that uses gathers more.At present in venous blood collection, various countries clinical staff, all uses pen type blood collection, split type vein blood taking needle and syringe.
Pen type blood collection: its structure is through needle tubing, and there is sharp cutting edge at its two ends; In needle tubing, hypomere is fixed on needle stand, and front end is called venipuncture needle, rear end is called collection blood pin, collection blood wire surface has blood resistance unit, there is protective casing at needle tubing two ends.During use, blood taking needle is rotated and is fixed on urceolus outer cylinder front end, implement venipuncture, after success, vacuum test tube is inserted urceolus rear end cavity, make collection blood pin rear end cutting edge through blood resistance unit and run through to thrust vacuum tube plug, under suction function, by blood suction blood taking tube; So repeatedly, the collection of multitube time blood specimen can be realized; Take a blood sample complete, extract venipuncture needle, local hemostasis, to discarded blood taking needle, need nurse again by blood taking needle front end sheath, be enclosed within blood taking needle appearance again, then rotate needle body, blood taking needle is taken off from urceolus, then blood taking needle is discarded in waste holder; In this operation, nurse's both hands overlap process again, and due to many reasons, nurse's finger, usually easily by needle pricks, needle stick injury occurs, and causes infection or the propagation of blood borne disease, as hepatitis C, acquired immune deficiency syndrome (AIDS); Consequence is extremely serious.
Add up according to American National medical department: occur in injection puncture and account for 26% of needle stick injury incidence rate with the pricking wound of blood collection procedure; Federal Government promulgated " safety of acupuncture and prevention " bill in 1120: the medical apparatus requiring medical institutions to be necessary for employee to provide safe; The operation standard of the staff of the contact blood source disease that U.S. occupation health safety administration formulates, wherein requires: in injection, puncture procedure code, firmly stop: hands take off syringe needle, bending syringe needle, from broken needle head, the behavior of overlapping needle guard again.
China, due to economical and historical reasons, is the mode using syringe donor source and blood taking needle to gather more than clinical blood sampling operation.According to China's medical statistics, scholarly journal report, clinical care practitioner by the incidence rate of needle stick injury up to more than 80%.Endanger extremely serious.
Domestic existing safe blood-taking needle scheme is disclosed, as: ZL201120503317.9; In technique scheme, although its venipuncture needle can be regained in the cavity of urceolus, safety is higher.But it in use, can not know whether syringe needle inserts intravenous after venipuncture is needled into human body by medical personnel, directly can only use vacuum test tube.If syringe needle does not enter human vein, then vacuum test tube just cannot collect blood, and now medical personnel just can judge that syringe needle does not enter vein, thus adjust.If adjust unsuccessful, then vacuum test tube can only be discarded, again puncture at new position, until successful acquisition is to blood.Which substantially increases blood sampling time and blood sampling cost.
Summary of the invention
This application provides a kind of safe blood-taking needle, to solve the problem.
According to the safe blood-taking needle that disclosure embodiment provides, comprise needle tubing, needle stand and urceolus;
The head of described urceolus is provided with surge motion control assembly;
Described needle stand comprise be made up of transparent material blood back form, for coordinating the axial screens body of the axially-movable limiting described needle tubing with described surge motion control assembly and for coordinating with the inwall of described urceolus and limiting the radial limit body of the radial motion of described needle tubing; Described blood back form is arranged on the afterbody of described radial limit body, and described axial screens body is arranged on the lateral wall of described blood back form;
Described needle tubing passes described blood back form and is fixedly connected with it; The described needle tubing part be positioned within described blood back form is provided with blood outlet;
One end of described blood back form and described needle tubing can be passed by the head of described urceolus and described surge motion control assembly, and one end that described needle tubing stretches out described urceolus is provided with the cutting edge of inclination;
The tail inner side of described urceolus is provided with the screens assembly for stoping described needle stand to be departed from by the afterbody of described urceolus.
In above-mentioned safe blood-taking needle,
The part that described needle tubing is positioned at described blood back form disconnects;
Or
Described needle tubing is positioned at the surface perforate of described blood back form.
In above-mentioned safe blood-taking needle, the head of described urceolus exists one perpendicular to the plane of its axis, and described surge motion control assembly comprises limit sliding chutes and limit body; Described limit sliding chutes is arranged on the plane, and described limit body can radially sliding along described needle tubing in described limit sliding chutes, and clamp with described axial screens body or depart from.
In above-mentioned safe blood-taking needle, described limit sliding chutes is two, is separately positioned on the both sides of described plane; Described needle tubing and described blood back form are passed by the middle part of described plane;
Described axial screens body is arranged on the outer peripheral face of described blood back form, and extends along the radial direction of described needle tubing;
Described limit body is provided with spacing hole; Along the glide direction of described limit body, there are two parts in described spacing hole, wherein Part I radial dimension is greater than the radial dimension of described axial screens body, and the size of Part II is between the radial dimension of described axial screens body and the radial dimension of described blood back form.
In above-mentioned safe blood-taking needle, described limit body is provided with baffle element, described baffle element can offset with described limit sliding chutes or described urceolus, and the Part I of described spacing hole is positioned on the axially-movable path of described blood back form.
In above-mentioned safe blood-taking needle, the head of described urceolus is the truncated cone-shaped of bottom hollow out, and described plane is the end face of this truncated cone-shaped;
Described radial limit body is truncated cone-shaped; The outer peripheral face of described radial limit body can be fitted with the head inner peripheral surface of described urceolus; The end face of described radial limit body is connected with the afterbody of described blood back form.
In above-mentioned safe blood-taking needle, described screens assembly comprises multiple axially extended card article along described urceolus; The edge of described radial limit body is provided with the breach corresponding with described card article, and described card article can pass through described breach.
In above-mentioned safe blood-taking needle, the front inner of described urceolus is also provided with multiple axially extended positive stop strip along described urceolus, the distributing position of described positive stop strip is corresponding with the described breach on described radial limit body, and mutually staggers with the axis of described card article at described urceolus; Described positive stop strip can pass through described breach.
In above-mentioned safe blood-taking needle, the afterbody of described card article and/or described positive stop strip is provided with chamfering.
In above-mentioned safe blood-taking needle, the arranged outside of described blood back form has elasticity part, and the two ends of described elasticity part offset with the inner portion face of described urceolus and the end face of described radial limit body respectively.
The technical scheme that embodiment of the present disclosure provides can comprise following beneficial effect:
The safe blood-taking needle that the embodiment of the present application provides can limit the position of needle tubing, makes needle tubing can stretch out the head of urceolus in use, and with within urceolus of can retracting after finishing using, prevents syringe needle from accidentally injuring other people; Meanwhile, medical personnel can observe blood back situation by blood back form again, and then reflect whether syringe needle enters human vein intuitively.
Therefore, the safe blood-taking needle that disclosure embodiment provides can save again blood sampling time and blood sampling cost while guarantee safety.
Should be understood that, it is only exemplary that above general description and details hereinafter describe, and can not limit the disclosure.
Accompanying drawing explanation
The Split type structure schematic diagram of the safe blood-taking needle that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the longitudinal cross-section of the safe blood-taking needle that Fig. 2 provides for the embodiment of the present invention;
The fit structure schematic diagram of the needle tubing that Fig. 3 provides for the embodiment of the present invention and needle stand;
The fit structure schematic diagram of the urceolus that Fig. 4 provides for the embodiment of the present invention and surge motion control assembly.
Accompanying drawing illustrates: 10-needle tubing; 100-blood exports; 102-cutting edge; 12-needle stand; 120-blood back form; The axial screens body of 122-; The radial limit body of 124-; 126-elasticity part; 128-breach; 14-urceolus; 140-plane; 142-positive stop strip; 144-damper portion; 146-band; 148-hands handle; 16-surge motion control assembly; 160-limit sliding chutes; 162-limit body; 164A-spacing hole Part I; 164B-spacing hole Part II; 166-handle; 168-baffle element; 18-screens assembly; 180-card article; 20-blood resistance unit.
Accompanying drawing to be herein merged in description and to form the part of this description, shows embodiment according to the invention, and is used from description one and explains principle of the present invention.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
The embodiment provides a kind of safe blood-taking needle, as shown in Figures 1 to 4, comprise needle tubing 10, needle stand 12 and urceolus 14;
The head of urceolus 14 is provided with surge motion control assembly 16;
Needle stand 12 comprise be made up of transparent material blood back form 120, for coordinating the axial screens body 122 of the axially-movable limiting needle tubing 10 with surge motion control assembly 16 and for coordinating with the inwall of urceolus 14 and limiting the radial limit body 124 of the radial motion of needle tubing 10; Blood back form 12 is arranged on the afterbody of radial limit body 124, and axial screens body 122 is arranged on the lateral wall of blood back form 120;
Needle tubing 10 passes blood back form 120 and is fixedly connected with it; Needle tubing 10 part be positioned within blood back form 120 is provided with blood outlet 100;
One end of blood back form 120 and needle tubing 10 can be passed by the head of urceolus 14 and surge motion control assembly 16, and one end that needle tubing 10 stretches out urceolus 14 is provided with the cutting edge 102 of inclination;
The tail inner side of urceolus 14 is provided with the screens assembly 18 for stoping needle stand 12 to be departed from by the afterbody of urceolus 14.
By needle stand 12 being set to comprise axial screens body 122, radial limit body 124 and blood back form 120 3 part, can by axial screens body 122 and surge motion control assembly 16 coordinate and radial limit body 124 and urceolus 14 coordinate the position jointly limiting needle tubing 10, make needle tubing 10 can stretch out the head of urceolus in use, and blood sampling after with urceolus 14 of can retracting within, prevent cutting edge 102 from accidentally injuring other people; Simultaneously, after syringe needle enters human vein blood vessel, under blood pressure effect, blood can flow in needle tubing 10, and export in 100 inflow blood back forms 120 by blood, such medical personnel just can observe blood back situation by blood back form 120, and then judge whether syringe needle enters human vein intuitively.Therefore the safe blood-taking needle that the embodiment of the present invention provides can save blood sampling time, and effectively prevents the waste of vacuum test tube, reduces blood sampling cost.
Wherein, blood outlet 100 can be adopted and be arranged in two ways.The first is that part needle tubing 10 being positioned at blood back form 120 disconnects, and be then individually fixed in by two parts on needle stand 12, the gap between two sections of needle tubings 10 just forms blood outlet 100.The second is the surface perforate being positioned at blood back form 120 at needle tubing 10, forms blood outlet 100.
In above-mentioned two kinds of modes, first kind of way ratio is easier to realize, and cost is also lower.But because needle tubing 10 blocks as two parts by needs, then each section of needle tubing 10 only has one end to be fixed on needle stand 12, lessens bonding strength like this, when stressed larger time needle tubing 10 and needle stand 12 may be caused to depart from.And the second way is owing to just offering a perforate at the sidepiece of needle tubing 10, therefore needle tubing 10 is still one, and more greatly, fastness is also better for its bonding strength with needle stand 12.But because needle tubing 10 is very tiny, therefore at its side-wall hole, difficulty is comparatively large technically, not only can reduce production efficiency, also easily cause the damage of needle tubing 10, increase cost.
In an embodiment of the present invention, for the ease of assembling and operation, can be made the plane 140 of head existence one perpendicular to its axis of urceolus 14 by design, surge motion control assembly 16 comprises limit sliding chutes 160 and limit body 162; Limit sliding chutes 160 is arranged in plane 140, and limit body 162 can radially sliding along needle tubing 10 in limit sliding chutes 160, and clamp with axial screens body 122 or depart from.
Like this by arranging plane 140, the setting of surge motion control assembly 16 can be convenient to.In operation, medical personnel only need exert a force to limit body 162 with hands, just can make limit body 162 radially sliding along needle tubing 10 in limit sliding chutes 160.In the process of movement, limit body 162 just can depart from the clamped condition with axial screens body 122, thus needle stand 12 can be moved along its axis.Just needle stand 12 can be made afterwards to move to the afterbody of urceolus 14, and make in the head retraction urceolus 14 of needle tubing 12.
In order to make limit body 162 more steady when sliding, two limit sliding chutes 160 can be set, be separately positioned on the both sides of plane 140.Meanwhile, needle tubing 10 and blood back form 120 are passed by the middle part of plane 140;
Axial screens body 122 is arranged on the outer peripheral face of blood back form 120, and extends along the radial direction of needle tubing 10;
Limit body 162 is provided with spacing hole; Along the glide direction of limit body 162, there is Part I 164A and Part II 164B in spacing hole, wherein Part I 164A radial dimension is greater than the radial dimension of axial screens body 122, and the size of Part II 164B is between the radial dimension of axial screens body 122 and the radial dimension of blood back form 120.
Like this, utilize two-part size difference on spacing hole, just can realize its function.The size of Part II 164B is greater than blood back form 120 and is but less than axial screens body 122, and therefore it can make blood back form 120 pass through and stop axial screens body 122 to pass through, thus realizes clamping function.And the size of Part I 164A is greater than axial screens body 122, therefore it can pass through for axial screens body 122, thus removes clamping function.
In use, axial screens body 122 can be designed as overall ring-type, also at it, certain several direction can arrange little projection, as long as can coordinate with spacing hole.Spacing hole can be designed as by the overlapping Pear-Shaped of two circular portions, and adduction in the middle part of it, both sides are respectively Part I 164A and Part II 164B.Due to when operating, cutting edge 102 is general all upward, and it is the most convenient that medical personnel are undertaken operating by this direction.Therefore, the glide direction of limit body 162 is preferably along the front of cutting edge 102 and the line at the back side.On this basis, Part I 164A is preferably arranged on the side, front of cutting edge 102, Part II 164B is arranged on the reverse side side of cutting edge 102, like this, medical personnel just can be positioned on the axially-movable path of blood back form 120 to make its Part I 164A limit body 162 applied thrust, are convenient to the retraction of needle tubing 10.For the ease of promoting, limit body 162 can also arrange handle 166 in the side, front of cutting edge 102.
In order to reduce the size impact that surge motion control assembly 16 brings, and convenient operation, limit body 162 can be made lamellar.
Owing to being to be exerted a force to limit body 162 by medical personnel and move it, the therefore displacement of limit body 162 and present position be not easy to control.Sometimes, although made blood back form 120 be positioned at Part I 164A, due to the bad assurance in position, blood back form 120 or axial screens body 122 may be caused to offset with the edge of Part I 164A, and stop the retraction of needle tubing 10.
In order to solve the problem, can arrange baffle element 168 on limit body 162, baffle element 168 can offset with limit sliding chutes 160 or urceolus 14, and the Part I 164A of spacing hole is positioned on the axially-movable path of blood back form 120.
Like this, the position just by baffle element 168 pairs of blood back forms 120 and Part I 164A is controlled, and is more beneficial to needle tubing 10 and retracts in urceolus 14.
Baffle element 168 can for bulk, strip, hook-shaped or other can realize its functional configurations, in order to improve precision, baffle element 168 preferably arranges two, lays respectively at the both sides of limit body 162.
The head of needle tubing 10 is when stressed, and owing to being connected with needle stand 12 in the middle part of it, and afterbody is unsettled, is therefore easy to produce the rotatory force being fulcrum with needle stand 12.In order to fully offset this burst of rotatory force, preferably, the head of urceolus 14 is the truncated cone-shaped of bottom hollow out, and plane 140 is the end face of this truncated cone-shaped;
Radial limit body 124 is truncated cone-shaped; The outer peripheral face of radial limit body 124 can be fitted with the head inner peripheral surface of urceolus 14; The end face of radial limit body 124 is connected with the afterbody of blood back form 120.
Like this, the side due to truncated cone-shaped is oblique extension, and therefore it can provide the support force of axial and radial both direction, to offset the rotatory force of needle tubing 10.
In an embodiment of the present invention, screens assembly 18 can comprise multiple axially extended card article 180 along urceolus 14; The edge of radial limit body 124 is provided with the breach 128 corresponding with card article 180, and card article 180 can pass through breach 128.
When assembling, the breach 128 be arranged on radial limit body 124 can be adjusted to relative with card article 180 by needle stand 12, and such needle stand 12 just can be entered into the inside of urceolus 14 by the afterbody of urceolus 14.Afterwards needle stand 12 is circumferentially turned an angle, breach 128 and card article 180 are staggered mutually.Like this when needle stand 12 moves to the afterbody of urceolus 14, because now breach 128 is not relative with card article 180, thus radial limit body 124 just can stop by card article 180, make it cannot depart from urceolus 14 by the afterbody of urceolus 14.
In order to safety coefficient can be improved further, reduce operation easier, also at the arranged outside elasticity part 126 of blood back form 120, such as, can be enclosed within the spring outside blood back form 120, the two ends of elasticity part 126 offset with the inner portion face of urceolus 14 and the end face of described radial limit body respectively.Like this when surge motion control assembly 16 is removed and after the clamping of axial screens body 122, the elastic force just produced by elasticity part 126 makes needle stand 12 automatically move to the afterbody of urceolus 14, drive needle tubing 10 to retract in urceolus 14 simultaneously.
Said structure can be limited in urceolus 14 by basic guarantee needle stand 12, but in some cases, needle stand 12 may produce a circumferential rotation displacement under the active force of external force or elasticity part 126, and what so just make radial limit body 124 situation that breach 128 is just in time relative with card article 180 when moving to the head of card article 180 exist to occur is possible.Once there is above-mentioned situation, needle stand 12 and needle tubing 10 still can be departed from by the afterbody of urceolus 14.
Therefore, in order to make the safety coefficient of this safe blood-taking needle higher, multiple axially extended positive stop strip 142 along urceolus 14 can be also provided with at the front inner of urceolus 14, the distributing position of positive stop strip 142 is corresponding with the breach 128 on radial limit body 124, and mutually staggers with the axis of card article 180 at urceolus 14; Positive stop strip 142 can pass through breach 128.
Like this, at radial limit body 124 by after card article 180, also need rotation angle, then by positive stop strip 142.And in the process of retraction needle tubing 10, first radial limit body 124 can move along positive stop strip 142, its circumferential rotatory force is cancelled, and the breach 128 afterwards on needle stand 12 can stagger with card article 180 all the time mutually, so just can ensure that needle stand 12 is blocked by screens assembly 18.
In the specific implementation, card article 180 and positive stop strip 142 all can arrange three, between be equally distributed on the inwall of urceolus 14 with 120 degree of intervals.
In addition, the head of positive stop strip 142 also can directly and the head inner peripheral surface of urceolus 14 offset, like this when needle stand 12 is blocked by surge motion control assembly 16, positive stop strip 142 can be in breach 128, therefore, it is possible to play the effect of restriction needle tubing motion.
Needle tubing 10 tail end of safety blood taking pipe generally all adopts and arranges tail end cutting edge and the mode of overlapping blood resistance unit 20 encapsulates, if therefore the assembly difficulty of needle stand 12 is comparatively large, blood resistance unit 20 may be caused to be punctured the situation of damage by tail end cutting edge, the more serious situation that assembly crewman also may occur and stabbed by tail end cutting edge.
Therefore, chamfering can be set at the afterbody of card article 180 and positive stop strip 142.Card article 180 can be convenient to like this and positive stop strip 142 coordinates with breach 128.
Meanwhile, when taking a blood sample, vacuum test tube needs to be stretched into by the afterbody of urceolus 14, and owing to being provided with the screens assembly 18 surrounded by card article 180 in urceolus 14, therefore vacuum test tube also needs screens assembly 18 after the afterbody stretching into urceolus 14.If screens assembly 18 is as the middle part of urceolus 14, then vacuum test tube is easy to be blocked by the edge of card article 180, inner space now due to urceolus 14 is narrow and small, and sight line is not good, and medical personnel are difficult to vacuum test tube be adjusted to center fast and pass screens assembly 18.So just, the prolongation of operating time can be caused.
In order to overcome the problems referred to above, the afterbody of card article 180 can be made to flush with the afterbody of urceolus 14.Like this, medical personnel only need carry out centering when loading vacuum test tube outside urceolus 14, just directly vacuum test tube can be passed screens assembly 18 afterwards, therefore avoid and adjust vacuum test tube in urceolus 14, reduce operation easier, shorten the operating time.
Because the afterbody of needle tubing 10 is also very sharp, also likely puncture human body, therefore, the afterbody of needle tubing 10 also can be limited within urceolus 14 by the mode lengthening card article 180 length.
When taking a blood sample, medical personnel generally pinch with hands the both sides force that urceolus 14 is positioned at cutting edge 102 front and the back side, therefore in order to increase the frictional force between finger and urceolus 14, reduce operation easier, the position in the front and the back side that can be positioned at cutting edge 102 at the outer wall of urceolus 14 all arranges damper portion 144, and damper portion 144 can increase damped coefficient by the mode arranging many bands 146.So just, the damped coefficient between finger and urceolus 14 effectively can be increased, increasing friction force.
In order to vacuum test tube can be made more to go deep in urceolus 14, the tail end being convenient to needle tubing 10 thrusts, and also can arrange the handle 148 of abduction at the afterbody of urceolus.Such medical personnel can catch on handle 148 with referring to middle finger, are then pushed in urceolus 14 by vacuum test tube with thumb.
Same, according to the custom of medical personnel, general handle 148 only need extend to the front of cutting edge 102 and the back side.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a safe blood-taking needle, is characterized in that, comprises needle tubing, needle stand and urceolus;
The head of described urceolus is provided with surge motion control assembly;
Described needle stand comprise be made up of transparent material blood back form, for coordinating the axial screens body of the axially-movable limiting described needle tubing with described surge motion control assembly and for coordinating with the inwall of described urceolus and limiting the radial limit body of the radial motion of described needle tubing; Described blood back form is arranged on the afterbody of described radial limit body, and described axial screens body is arranged on the lateral wall of described blood back form;
Described needle tubing passes described blood back form and is fixedly connected with it; The described needle tubing part be positioned within described blood back form is provided with blood outlet;
One end of described blood back form and described needle tubing can be passed by the head of described urceolus and described surge motion control assembly, and one end that described needle tubing stretches out described urceolus is provided with the cutting edge of inclination;
The tail inner side of described urceolus is provided with the screens assembly for stoping described needle stand to be departed from by the afterbody of described urceolus;
The head of described urceolus exists one perpendicular to the plane of its axis, and described surge motion control assembly comprises limit sliding chutes and limit body; Described limit sliding chutes is arranged on the plane, and described limit body can radially sliding along described needle tubing in described limit sliding chutes, and clamp with described axial screens body or depart from.
2. safe blood-taking needle according to claim 1, is characterized in that,
The part that described needle tubing is positioned at described blood back form disconnects;
Or
Described needle tubing is positioned at the surface perforate of described blood back form.
3. safe blood-taking needle according to claim 1, is characterized in that, described limit sliding chutes is two, is separately positioned on the both sides of described plane; Described needle tubing and described blood back form are passed by the middle part of described plane;
Described axial screens body is arranged on the outer peripheral face of described blood back form, and extends along the radial direction of described needle tubing;
Described limit body is provided with spacing hole; Along the glide direction of described limit body, there are two parts in described spacing hole, wherein Part I radial dimension is greater than the radial dimension of described axial screens body, and the size of Part II is between the radial dimension of described axial screens body and the radial dimension of described blood back form.
4. safe blood-taking needle according to claim 3, it is characterized in that, described limit body is provided with baffle element, and described baffle element can offset with described limit sliding chutes or described urceolus, and the Part I of described spacing hole is positioned on the axially-movable path of described blood back form.
5. safe blood-taking needle according to claim 1 and 2, is characterized in that, the head of described urceolus is the truncated cone-shaped of bottom hollow out, and described plane is the end face of this truncated cone-shaped;
Described radial limit body is truncated cone-shaped; The outer peripheral face of described radial limit body can be fitted with the head inner peripheral surface of described urceolus; The end face of described radial limit body is connected with the afterbody of described blood back form.
6. safe blood-taking needle according to claim 5, is characterized in that, described screens assembly comprises multiple axially extended card article along described urceolus; The edge of described radial limit body is provided with the breach corresponding with described card article, and described card article can pass through described breach.
7. safe blood-taking needle according to claim 6, it is characterized in that, the front inner of described urceolus is also provided with multiple axially extended positive stop strip along described urceolus, the distributing position of described positive stop strip is corresponding with the described breach on described radial limit body, and mutually staggers with the axis of described card article at described urceolus; Described positive stop strip can pass through described breach.
8. safe blood-taking needle according to claim 7, is characterized in that, the afterbody of described card article and/or described positive stop strip is provided with chamfering.
9. safe blood-taking needle according to claim 5, is characterized in that, the arranged outside of described blood back form has elasticity part, and the two ends of described elasticity part offset with the bottom of described plane and the end face of described radial limit body respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397910.8A CN104127191B (en) | 2014-08-13 | 2014-08-13 | Safe blood-taking needle |
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|---|---|---|---|
| CN201410397910.8A CN104127191B (en) | 2014-08-13 | 2014-08-13 | Safe blood-taking needle |
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| CN104127191A CN104127191A (en) | 2014-11-05 |
| CN104127191B true CN104127191B (en) | 2015-12-30 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU729720B2 (en) * | 1996-02-27 | 2001-02-08 | B. Braun Melsungen Ag | Needle tip guard for hypodermic needles |
| US6224576B1 (en) * | 1999-11-04 | 2001-05-01 | Specialized Health Products, Inc. | Safety device for a needle having two sharpened ends |
| CN101361661A (en) * | 2008-08-01 | 2009-02-11 | 徐昊华 | One-time operation safe vacuum blood-sample acquisition needle |
| CN204033352U (en) * | 2014-08-13 | 2014-12-24 | 北京光耀世纪医疗科技有限公司 | Safe blood-taking needle |
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