CN102028479B - One-off safe and indolent contact pressure type hemostix - Google Patents
One-off safe and indolent contact pressure type hemostix Download PDFInfo
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- CN102028479B CN102028479B CN2010105745402A CN201010574540A CN102028479B CN 102028479 B CN102028479 B CN 102028479B CN 2010105745402 A CN2010105745402 A CN 2010105745402A CN 201010574540 A CN201010574540 A CN 201010574540A CN 102028479 B CN102028479 B CN 102028479B
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Abstract
The invention relates to a one-off safe and indolent contact pressure type hemostix, which comprises a housing, a movable inner sleeve sleeved in the housing, a blood taking needle, a spring and an upper fixed cover, wherein the blood taking needle consists of a stainless steel needle and a wing-shaped needle handle; the movable inner sleeve, the blood taking needle and the spring are arranged in the housing; the movable inner sleeve has an expanding sleeve structure; and the insertion of the needle is realized by opening and closing a V-shaped opening at the upper end of the movable inner sleeve. Compared with the conventional hemostix, the one-off safe and indolent contact pressure type hemostix can avoid the axial rotation and jitter of the blood taking needle in the insertion of the needle, make stable the insertion of the blood taking needle and greatly reduce pains brought to a patient by the blood taking needle; in addition, the hemostix has a simple structure, and is easy to machine, manufacture and assemble. The spring of the hemostix is an extension-compression type spring consisting of a compression spring and an extension spring, drives the rapid insertion and withdrawal of the blood taking needle and can eliminate the pains brought to the patient in blood taking.
Description
Technical field
The invention belongs to medical trace blood technique with the apparatus field, more particularly, relate to the painless hemostix of a kind of disposable press-type safety.
Background technology
Disposable blood taking device is a kind of medical device commonly used, is to utilize blood taking needle puncture patient's finger or ear to take a blood sample.At present, instrument for blood collection on the market all can bring pain to patient in use, this pain be because instrument for blood collection in use, the inserting needle speed of blood taking needle or go out that needle speed causes excessively slowly.The pain god who is significantly less than human body when inserting needle speed is during with cerebripetal transmission speed, and the human body peripheral nerve can be accomplished once the overall process to the primary event arc of brain conduction smoothly, thereby makes human body produce pain; When withdraw of the needle speed is crossed when slow; Because of being easy to produce small relative motion (especially being afraid of the women or the child of pain) between blood taking needle and patient's finger or the ear; Vertical pulling of syringe needle right and wrong in human body or swing must increase the weight of the stimulation to the human body peripheral nerve, thereby produce pain.The two fast one slow rules of following when above-mentioned principle and intramuscular injection (inserting needle is with to go out needle speed fast, and it is slow to push away medicine) are same reasons.
The patent No. is that 200920096338.6 patent discloses a kind of blood taking needle, and the inclined-plane that puts in this hemostix utilization activity cooperates with the wedge shape of blood taking needle is protruding, relies on blood taking needle to rotate along the inclined-plane to make the spring also inserting needle that releases energy; Because of spring and blood taking needle are to be fixedly connected; This will make blood taking needle when inserting needle, and stainless pin has shake or rotation in various degree, like this; When having the rustless steel syringe needle entering human body skin on three inclined-planes, will certainly bring pain in various degree to patient.
The disposable blood taking device that existing each factory on the market produces all is with the power source of compression spring as the inserting needle and the withdraw of the needle, and the overwhelming majority adopts a compression spring to realize two actions of the hemostix inserting needle and the withdraw of the needle.Its operation principle is: the compression spring that is in compressive state promotes the blood taking needle inserting needle through the abrupt release energy; When the compression spring is upspring and is got into free state; The compression spring has been accomplished a working procedure, and is through with it as the work mission of compression spring and output kinetic energy no longer, can still have needling length about 4mm can accomplish the overall process of the inserting needle and the withdraw of the needle at this moment; At this moment; The length that need utilize the inertia kinetic energy that is had on the blood taking needle (being made up of parts such as stainless pin, needle handles) to drive and will be in about the compression spring elongation 4mm under the free state is moved to accomplish inserting needle, and after inserting needle was accomplished, the inertia kinetic energy on the blood taking needle was zero; The compression spring that is elongated can drive connection blood taking needle retraction above that, accomplishes withdraw of the needle action with this.The above-mentioned spring that will compress uses as extension spring, need consume the very big kinetic energy of blood taking needle in the inserting needle process during stretching, therefore, will inevitably cause the inserting needle speed of blood taking needle slow, thereby make patient produce pain.
Summary of the invention
The present invention provides a kind of simple in structure for solving the technical problem that exists in the known technology, can eliminate the pain of bringing to patient behind inserting needle, the withdraw of the needle and the pin, and can obtain the painless hemostix of disposable press-type safety of enough blood sampling volumes.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the painless hemostix of a kind of disposable press-type safety; Comprise overcoat, be sleeved on overcoat inner movable interior cover, blood taking needle, spring and fixed cover; Said blood taking needle is made up of stainless pin and aerofoil profile needle handle; It is characterized in that: the inwall of said overcoat is the poroid structure of stairstepping; And the Circularhole diameter of said overcoat lower inside is less than the Circularhole diameter of overcoat inside upper part, and the inwall of overcoat is provided with two symmetrical slide grooves, and the bottom end opening inboard of overcoat is provided with defining flange; Cover is the hollow shape pipe box in the said activity; The bottom of cover is to be provided with at the bottom of the cover of eyelet in movable; The upper, open end of cover is arranged with v-shaped openings in movable, and it is protruding that the bottom cylindrical of movable interior cover is provided with the protruding and symmetrical radial rib shape of symmetrical axial ribs shape, is provided with open slot between said v-shaped openings and the axial ribs shape convexity; The top cylindrical of cover is provided with protruding band in the said activity; In the said activity cover through the axial ribs shape of its underpart protruding with the slide groove fitted shaft in being movably arranged on overcoat, cover is positioned at the circular hole of overcoat bottom in the said activity, the radial rib shape is protruding to be cooperated with the defining flange of jacket bottom; Said blood taking needle is arranged on overcoat inside, and is positioned at the top of movable cover, and the stainless pin of blood taking needle is connected with the aerofoil profile needle handle, and the aerofoil profile needle handle comprises columniform handle body, is arranged with the aerofoil profile convexity on the handle body, and the upper end of handle body is the spring connecting portion; Said spring is for mixing spring, and the mixing spring is connected and composed by the compression spring and the extension spring of coaxial line, and an end that mixes spring is connected with the spring connecting portion of blood taking needle needle handle, and the other end that mixes spring connects fixed cover; Fixed cover is installed in outer set upper side.
The present invention can also adopt following technical scheme:
Said extension spring is 0.3-0.6mm with the spring filament diameter of compression spring, and the said extension spring of stating is 0.6 with the number of turns ratio that compresses spring: 1-1.2: 1.
The spring connecting portion of the needle handle of said blood taking needle is the circular cylinder that has agnail.
The top of said fixed cover is the plane, and the below of fixed cover is provided with spring mounting groove and fixing lug boss, and the open upper end inboard of said overcoat is provided with the top cover draw-in groove, and fixed cover is installed on the coat through fixing lug boss and top cover draw-in groove.
Said mixing spring comprises compression spring and the extension spring that forms with a steel wire coiling, and the compression spring is connected with the spring connecting portion of the needle handle of said blood taking needle, and extension spring is connected with fixed cover.
The stainless pin of said blood taking needle is provided with plastics and carefully overlaps, and the thin cover of said plastics is flat-shaped body.
The upper end of said axial ribs shape convexity is concordant with the upper surface of radial rib shape convexity, and the protruding top of radial rib shape is provided with open seam.
Protruding needle point one side of said aerofoil profile is V font inclined-plane.
Advantage and good effect that the present invention has are:
1. adopt " expansion sleeve type " movable interior cover to be connected with blood taking needle; Axial rotation and shake when having avoided the blood taking needle inserting needle; Make that the blood taking needle inserting needle is steady, can reduce the pain that blood taking needle brings to patient greatly, in addition; Hemostix according to the invention is simple in structure, and processing and manufacturing is easy with assembling.
2. the spring of being selected for use in the hemostix of the present invention is a drawing and pressing type mixing spring, and said mixing spring comprises extension spring and compression spring, and extension spring is connected through the end with the compression spring.The present invention is organically integrated extension spring and compression spring, when spring by compression the time, and the compression springs; When spring was stretched, extension spring worked.Compare existing hemostix, have advantage:
In hemostix inserting needle process, after the compression spring in the hemostix promoted blood taking needle high speed inserting needle and returns to free state, the blood taking needle in the hemostix started drag extension spring because of inertia kinetic energy; Compare existing blood taking needle pulling compression spring; Significantly reduced the kinetic energy loss (combine actual measurement, can reduce the kinetic energy loss more than 50%) in the blood taking needle inserting needle process, like this; The kinetic energy of saving can be used and improve on the inserting needle speed and strength of blood taking needle, has eliminated the pain of inserting needle.In addition, extension spring drives the speed of the blood taking needle withdraw of the needle, can satisfy the speed that the blood taking needle withdraw of the needle does not cause pain fully.Drawing and pressing type mixing spring performs to the effect of two kinds of springs ultimate attainment, makes the hemostix inserting needle and the withdraw of the needle can not bring pain to patient.
Description of drawings
For the embodiment of the invention or technical scheme of the prior art clearly are described; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing that describes below tightly is some embodiments of the present invention, for this area or those of ordinary skill; Under the situation of not paying creative prerequisite, can also obtain other accompanying drawings according to this accompanying drawing.
Fig. 1 is this structural representation;
Fig. 2 is the structural representation of overcoat among the present invention;
Fig. 3 is the structural representation of movable interior cover among the present invention;
Fig. 4 is the structural representation of blood taking needle among the present invention;
Fig. 5 is the structural representation of disclosed spring in the embodiment of the invention one;
Fig. 6 is the structural representation of disclosed spring in the embodiment of the invention two;
Fig. 7 is the structural representation of disclosed spring in the embodiment of the invention three;
Fig. 8 is the structural representation of fixed cover among the present invention.
Among the figure: 1, overcoat; 1-1, defining flange; 1-2, slide groove; 1-3, top cover draw-in groove; 1-4, circular arc step; 2, movable interior cover; 2-1, axial ribs shape convexity; 2-2, radial rib shape convexity; 2-3, v-shaped openings; 2-4, open slot; 2-5, open seam; 2-6, protruding band; 3, blood taking needle; 3-1, stainless pin; 3-2, aerofoil profile needle handle; 3-2-1, handle body; 3-2-2, aerofoil profile convexity; 3-2-3, spring connecting portion; 4, mix spring; 4-1, compression spring; 4-2, extension spring; 5, fixed cover; 5-1, fixing lug boss; 5-2, spring mounting groove.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now, and conjunction with figs. specifies as follows:
Embodiment one
See also Fig. 1, the painless hemostix of a kind of disposable press-type safety.This hemostix is made up of cover 2, blood taking needle 3, mixing spring 4 and fixed cover 5 five parts in overcoat 1, the activity.
As shown in Figure 2; Said overcoat 1 is the thin-walled hollow pipe box of an injection mo(u)lding; Overcoat 1 inwall is the poroid structure of stairstepping, and the Circularhole diameter of overcoat 1 lower inside is less than the Circularhole diameter of overcoat inside upper part, to form thin circular arc step 1-4 on this its external sleeve inwall.The inwall of overcoat 1 is provided with two symmetrical slide groove 1-2.The bottom end opening inboard of overcoat 1 is provided with defining flange 1-1, and the open upper end inboard of overcoat 1 is provided with top cover draw-in groove 1-3.The lower end of said slide groove 1-2 connects the lower surface of overcoat 1, is installed in inner movable of overcoat 1 cover 2 and blood taking needle 3 all along slide groove 1-2 axially-movable.
As shown in Figure 3; Cover 2 is thin-walled hollow sleeve pipes of injection mo(u)lding in movable; The lower end of cover 2 is provided with at the bottom of the less cover of thickness in movable; The cover end, be provided with the eyelet that can supply syringe needle and needle guard to come in and go out; The upper, open end symmetry of cover 2 offers two v-shaped openings 2-3 in movable, and the bottom outer circumference surface of movable interior cover 2 is provided with protruding 2-1 of symmetrical axial ribs shape and the symmetrical protruding 2-2 of radial rib shape, and the upper end of the protruding 2-1 of axial ribs shape is concordant with the upper surface of radial rib shape convexity 2-2.The protruding 2-1 of above-mentioned axial ribs shape cooperates installation with slide groove 1-2 on overcoat 1 inwall; The axial rotation when thereby cover 2 its external sleeve interior 1 are slided in the restraint; The protruding 2-2 of radial rib shape cooperates with the positive stop lug boss 1-1 of overcoat 1 bottom, with cover 2 extension elongations from overcoat 1 lower ending opening in the restraint.Be provided with open slot 2-4 between protruding 2-1 of axial ribs shape and the said v-shaped openings 2-3; The width of slide groove 1-2 on the width of open slot 2-4 and overcoat 1 inwall is identical; The top of the protruding 2-2 of radial rib shape is provided with open seam 2-5; Open seam 2-5 helps the v-shaped openings 2-3 folding of movable interior cover 2 upper ends, and the top cylindrical of movable interior cover 2 is provided with convexity band 2-6.Movable interior cover 2 is sleeved on overcoat 1 inside, and cover 2 is positioned at the path hole of overcoat 1 bottom in the activity, overlaps 2 in the activity and pushed by the convexity band 2-6 of its upper end and the inwall of overcoat 1, and make that the v-shaped openings 2-3 lower end on its top is closed.
As shown in Figure 4, said blood taking needle 3 is the cast molectron, and blood taking needle 3 is made up of stainless pin 3-1 and aerofoil profile needle handle 3-2.Aerofoil profile needle handle 3-2 is injection mo(u)lding; Aerofoil profile needle handle 3-2 comprises columniform handle body 3-2-1; Be arranged with the protruding 3-2-2 of aerofoil profile on the handle body 3-2-1; Needle point one side of the protruding 3-2-2 of aerofoil profile is V font inclined-plane (also can be arc surface), and the protruding 3-2-2 of aerofoil profile cooperates installation, the axial rotation in the time of can limiting blood taking needle 3 its external sleeve 1 internal motion with overcoat 1 interior slide groove 1-2; The most advanced and sophisticated V font inclined-plane of the protruding 3-2-2 of aerofoil profile cooperates with the v-shaped openings 2-3 of movable interior cover 2, can limit 1 inner the moving axially of blood taking needle 3 its external sleeve.The upper end of handle body 3-2-1 is spring connecting portion 3-2-3, and spring connecting portion 3-2-3 is the circular cylinder that has agnail.Above-mentioned stainless pin 3-1 top-pour is moulded plastics that are shaped as flat-shaped body and is carefully overlapped (not expressing among the figure), and the thin cover of plastics can prevent that blood taking needle from polluting.
As shown in Figure 5, said spring is the mixing spring 4 of drawing and pressing type, and drawing and pressing type mixing spring is formed by compression spring 4-1 and extension spring 4-2 organic assembling, compresses spring 4-1 and extension spring 4-2 coaxial line, and is connected through the end.In the present embodiment, mix spring and be made up of one section compression spring 4-1 and one section extension spring 4-2, compression spring 4-1 and extension spring 4-2 select the stainless steel spring silk in same silk footpath for use, and coiling forms drawing and pressing type mixing spring continuously on torsion machine.
Technical parameter and installation requirement that this drawing and pressing type mixes spring are:
1. spring is in when assembling, must accomplish the two ends of mixing spring fixingly simultaneously, like this, can guarantee that blood taking needle ejects inserting needle at a high speed, also can guarantee the blood taking needle withdraw of the needle that bounces back at a high speed.
2. according to the structure of different hemostixes and the syringe needle diameter of blood taking needle, select the different spring filament diameters and the coiling number of turns for use.Said spring filament diameter is selected in the scope internal reference of 0.3-0.6mm, if the spring filament diameter less than 0.3mm, the phenomenon that elastic force is not enough or pulling force is not enough can appear in spring, thereby reduces the inserting needle or the withdraw of the needle speed of blood taking needle, makes patient produce pain; If the spring filament diameter is greater than 0.6mm, the elastic force of spring is excessive, and the syringe needle of blood taking needle can stop the long time in tissue, and the syringe needle of blood taking needle can swing, and can cause heavier pain reaction, has also increased unnecessary material and cost simultaneously.
3. generally speaking, extension spring is get final product at 1: 1 with the number of turns ratio of compression spring, as required can be at proportion 0.6: 1-1.2: the selection of 1 internal reference; But should grasp following rule; Generally speaking, the number of turns of extension spring coiling is very few, the kinetic energy consumption in the time of can increasing blood taking needle pulling extension spring; Thereby reduce the inserting needle speed of blood taking needle, make patient produce pain; The number of turns of extension spring steel coiling is too much, the inserting needle speed of the blood taking needle that not only can slow down, but also can increase the total length that mixes spring, and make the total length of hemostix increase, increased unnecessary production cost.
4. the mixing spring that the present invention adopted; Blood taking needle is that the pulling extension spring carries out inserting needle; Compare existing blood taking needle pulling compression spring inserting needle, the inertia kinetic energy loss in the time of can significantly reducing the blood taking needle inserting needle, here; Must compare the compression spring and reduce 50%-70% to guarantee the loss of described inserting needle inertia kinetic energy through above-mentioned parameter design extension spring.When the inertia kinetic energy loss reduces less than 50% the time, can reduce inserting needle speed; When the inertia kinetic energy loss reduces greater than 70 the time, can reduce the withdraw of the needle speed of blood taking needle, the two all can bring pain to patient.
5. this drawing and pressing type mixes the stainless steel spring silk that spring can be selected same silk footpath for use, forms according to designing requirement continuous coiling on torsion machine.In addition, also can adopt different silks footpath segmentation coiling extension springs and compression springs, will make extension spring afterwards and utilize connector (this connector can be two sections plastic fastenings that have draw-in groove, representes among the figure) with the compression spring linking into an integrated entity gets final product.
The drawing and pressing type mixing spring that the present invention adopted has essential distinction with the cylindrical compression spring of indivedual segmentation coilings that exist on the market.The cylindrical compression spring of segmentation coiling on the market; Be because of designing or structural special requirement; Promptly guaranteeing that the compression spring has under the certain-length prerequisite; Spring also will have the elastic force of requirement, if will compress the form that the total length of spring all turns to the compression spring, will inevitably diminish because of the long elastic force that makes of the length of spring.For addressing the above problem, have to be with compressing spring segmentation coiling, at first; According to the elastic force requirement of this compression spring, calculate the silk footpath of this compression spring, parameters such as the coiling number of turns, drift, active length, spring wire ring height; And carry out coiling according to the manufacturing process of routine compression spring, and supply the not enough difference of spring length through gapless close winding method more at last, this winding method can guarantee the length requirement of this compression spring; Can guarantee the elastic force requirement of this compression spring again; Close winding spring section wherein only plays the effect that replenishes spring length, says that from the performance of spring its essence still is a kind of compression spring.
And this drawing and pressing type mixes spring and above-mentioned special lengthening cylindrical compression spring has essential distinction; Drawing and pressing type mixing spring not only will calculate the elastic force requirement of compression spring in design, also will calculate and the best pulling force that compresses the extension spring that spring is connected; Guarantee in the blood taking needle withdraw of the needle not under bitterly the prerequisite with this; Save compression spring kinetic energy loss to greatest extent, improve the inserting needle speed of blood taking needle, can not bring pain when guaranteeing the blood taking needle inserting needle to patient.
It is cylindricality spring or volute spring that this drawing and pressing type mixes the optimal manufacturing shape of spring, and this also is best suited for the disposable safe hemostix, has to make simply, easy for installation, the low and practical advantage of processing cost.
As shown in Figure 8, said fixed cover 5 adopts injection moulding to accomplish, and the top of fixed cover 5 is the plane, and the below of fixed cover 5 is provided with spring mounting groove 5-2 and fixing lug boss 5-1, and fixed cover 5 is installed on the overcoat 1 through fixing lug boss 5-1 and top cover draw-in groove 1-3.
Embodiment two
Hemostix by overcoat 1, movable in cover 2, blood taking needle 3, spring mix 4 and fixed cover 5 five parts forms, wherein overcoat 1, movable in the structure of cover 2, blood taking needle 3 and fixed cover 5 all identical with enforcement one described structure.
As shown in Figure 6, in the present embodiment, said mixing spring 4 is drawing and pressing type mixing spring, and drawing and pressing type mixing spring is formed by compression spring 4-1 and extension spring 4-2 organic assembling, compresses spring 4-1 and extension spring 4-2 coaxial line, and is connected through the end.Mixing spring is made up of two sections compression spring 4-1 and one section extension spring 4-2; Two sections compression spring 4-1 lay respectively at the both sides of extension spring 4-2; Two sections compression spring 4-1 and one section extension spring 4-2 select same silk stainless steel spring silk directly for use, and coiling forms drawing and pressing type mixing spring continuously on torsion machine.
Embodiment three
Hemostix by overcoat 1, movable in cover 2, blood taking needle 3, mix spring 4 and fixed cover 5 five parts are formed, wherein overcoat 1, movable in the structure of cover 2, blood taking needle 3 and fixed cover 5 all identical with enforcement one described structure.
As shown in Figure 7, in the present embodiment, said mixing spring 4 is drawing and pressing type mixing spring, and drawing and pressing type mixing spring is formed by compression spring 4-1 and extension spring 4-2 organic assembling, compresses spring 4-1 and extension spring 4-2 coaxial line, and is connected through the end.Mixing spring is made up of one section compression spring 4-1 and two sections extension spring 4-2; Two sections extension spring 4-2 lay respectively at the both sides of compression spring 4-1; One section compression spring 4-1 and two sections extension spring 4-2 select same silk stainless steel spring silk directly for use, and coiling forms drawing and pressing type mixing spring continuously on torsion machine.
Assembling of this hemostix and use:
The one end plug-in mounting that will mix spring 4 earlier gets in the spring mounting groove 5-2 of fixed cover 5, and the other end that will mix spring 4 again is sleeved on the spring connecting portion 3-2-3 of blood taking needle 3, and fixes with the agnail on the spring connecting portion 3-2-3.The protruding 2-1 of axial ribs shape and the overcoat 1 inner slide groove 1-2 of cover 2 lower ends in movable are aligned; The upper end cover of cover 2 in movable from overcoat 1 fed in the overcoat 1; The protruding 2-2 of the radial rib shape of cover 2 lower ends contacts with the defining flange 1-1 of overcoat 1 bottom in movable; At this moment; Movable interior cover 2 integral body all are positioned at the path circular hole of overcoat 2 inside, because of the projection band 2-6 that overlaps 2 upper ends in movable is pushed by overcoat path hole, and make the v-shaped openings 2-3 lower end of movable interior cover 2 upper ends be in closure state.Be connected through mixing spring 4 between blood taking needle 3 and the fixed cover 5; Symmetrical airfoil projection 3-2-2 and the overcoat 1 inner slide groove 1-2 of the aerofoil profile needle handle 3-2 of blood taking needle 3 are aligned; Feed into blood taking needle 3 and the upper end cover of fixed cover 5 assemblies in the overcoat 1 from overcoat 1; Fixed cover 5 cooperates with the top cover draw-in groove 1-3 of overcoat 1 upper end through the fixing lug boss 5-1 on it, is fixed on the upper end of overcoat 1 to fixed cover 5, at this moment; The most advanced and sophisticated V font inclined-plane of aerofoil profile projection 3-2-2 on the blood taking needle 3 cooperates with the v-shaped openings 2-3 of movable interior cover 2; Closed v-shaped openings 2-3 restriction blood taking needle 3 is along the axial downward movement of overcoat 1, make between blood taking needle 3 and the fixed cover 5 compression spring 4-1 compressive deformation and stored energy, this energy can be converted into the kinetic energy of the blood taking needle inserting needle of hemostix.
The method for using of hemostix:
With the painless hemostix taking-up of disposable safe of sterilization, one of user holds the overcoat 1 of hemostix, and the another hands is pulled out needle guard after needle guard is done 90 ° of-180 ° of rotations; With the sterile blood sampling site of hemostix perpendicular alignmnet, be placed on the end face of movable interior cover 2 extensions of hemostix stably on the skin that needs blood sampling site, user firmly presses down the overcoat 1 or the fixed cover 5 of hemostix gently; Move on the cover 2 and further compressed mixed spring 4 in the activity in the hemostix, afterwards, the projection band 2-6 of movable interior cover 2 upper ends gets in the hole, big footpath of overcoat 1 inside; Mixing under the most advanced and sophisticated V font ramp effect of spring 4 extruding and blood taking needle 3 aerofoil profile projection 3-2-2, thoroughly open rapidly the lower end of the v-shaped openings 2-3 of movable interior cover 2 upper ends, and the compressed compression spring 4-1 between blood taking needle 3 and fixed roof 5 releases energy; Promote the open slot 2-4 downward high speed inserting needle of blood taking needle 3 along the v-shaped openings 2-3 lower end of movable interior cover 2; Meanwhile, the aerofoil profile projection 3-2-2 on the blood taking needle 3 is the interior motion of slide groove 1-2 of its external sleeve 1 always, plays the effect of guiding and restriction blood taking needle 3 axial rotation with this; After compression spring 4-1 is discharged into free state; Blood taking needle 3 is when continuing the high speed inserting needle, and the extension spring 4-2 that leans on the inertia kinetic energy pulling to be connected with compression spring 4-1 arrives the length of needs, penetrate into the prescribed depth of blood sampling site as stainless pin 3-1 after; Kinetic energy on the blood taking needle 3 is zero; At this moment, extension spring 4-2 can be exceedingly fast retracts blood taking needle 3 and accomplishes quick withdraw of the needle action, like this; The final once overall process of blood sampling of accomplishing; At this moment, user only needs to get into crowded blood immediately and just can accomplish whole blood sampling work with the work of collection blood after the unified placement of exhausted hemostix.
Claims (8)
1. painless hemostix of disposable press-type safety; Comprise overcoat, be sleeved on overcoat inner movable interior cover, blood taking needle, spring and fixed cover; Said blood taking needle is made up of stainless pin and aerofoil profile needle handle, it is characterized in that: the inwall of said overcoat is the poroid structure of stairstepping, and the Circularhole diameter of said overcoat lower inside is less than the Circularhole diameter of overcoat inside upper part; The inwall of overcoat is provided with two symmetrical slide grooves, and the bottom end opening inboard of overcoat is provided with defining flange; Cover is the hollow shape pipe box in the said activity; The bottom of cover is to be provided with at the bottom of the cover of eyelet in movable; The upper, open end of cover is arranged with v-shaped openings in movable, and it is protruding that the bottom cylindrical of movable interior cover is provided with the protruding and symmetrical radial rib shape of symmetrical axial ribs shape, is provided with open slot between said v-shaped openings and the axial ribs shape convexity; The top cylindrical of cover is provided with protruding band in the said activity; In the said activity cover through the axial ribs shape of its underpart protruding with the slide groove fitted shaft in being movably arranged on overcoat, cover is positioned at the circular hole of overcoat bottom in the said activity, the radial rib shape is protruding to be cooperated with the defining flange of jacket bottom; Said blood taking needle is arranged on overcoat inside, and is positioned at the top of movable cover, and the stainless pin of blood taking needle is connected with the aerofoil profile needle handle, and the aerofoil profile needle handle comprises columniform handle body, is arranged with the aerofoil profile convexity on the handle body, and the upper end of handle body is the spring connecting portion; Said spring is for mixing spring, and the mixing spring is connected and composed by the compression spring and the extension spring of coaxial line, and an end that mixes spring is connected with the spring connecting portion of blood taking needle needle handle, and the other end that mixes spring connects fixed cover; Fixed cover is installed in outer set upper side.
2. the painless hemostix of disposable press-type safety according to claim 1 is characterized in that: said extension spring is 0.3-0.6mm with the spring filament diameter of compression spring, and said extension spring is 0.6 with the number of turns ratio of compression spring: 1-1.2: 1.
3. the painless hemostix of disposable press-type safety according to claim 1, it is characterized in that: the spring connecting portion of the needle handle of said blood taking needle is the circular cylinder that has agnail.
4. the painless hemostix of disposable press-type safety according to claim 1; It is characterized in that: the top of said fixed cover is the plane; The below of fixed cover is provided with spring mounting groove and fixing lug boss; The open upper end inboard of said overcoat is provided with the top cover draw-in groove, and fixed cover is installed on the coat through fixing lug boss and top cover draw-in groove.
5. according to claim 1,2, the painless hemostix of 3 or 4 described disposable press-type safety; It is characterized in that: said mixing spring comprises compression spring and the extension spring that forms with a steel wire coiling; The compression spring is connected with the spring connecting portion of the needle handle of said blood taking needle, and extension spring is connected with fixed cover.
6. the painless hemostix of disposable press-type safety according to claim 1, it is characterized in that: the stainless pin of said blood taking needle is provided with plastics and carefully overlaps, and the thin cover of said plastics is flat-shaped body.
7. the painless hemostix of disposable press-type safety according to claim 1 is characterized in that: the upper end of said axial ribs shape convexity is concordant with the upper surface of radial rib shape convexity, and the protruding top of radial rib shape is provided with open seam.
8. the painless hemostix of disposable press-type safety according to claim 1 is characterized in that: protruding needle point one side of said aerofoil profile is V font inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105745402A CN102028479B (en) | 2010-12-06 | 2010-12-06 | One-off safe and indolent contact pressure type hemostix |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105745402A CN102028479B (en) | 2010-12-06 | 2010-12-06 | One-off safe and indolent contact pressure type hemostix |
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| Publication Number | Publication Date |
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| CN102028479A CN102028479A (en) | 2011-04-27 |
| CN102028479B true CN102028479B (en) | 2012-05-23 |
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| CN2010105745402A Active CN102028479B (en) | 2010-12-06 | 2010-12-06 | One-off safe and indolent contact pressure type hemostix |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104068866B (en) * | 2014-07-03 | 2016-01-13 | 天津华鸿科技有限公司 | A kind of blood collecting pen cap for brush preventing blood taking needle from shaking |
| CN104545945A (en) * | 2015-01-26 | 2015-04-29 | 王振民 | Lever-locked integrated type side-triggered disposable blood collector |
| CN104644182B (en) * | 2015-02-26 | 2017-04-05 | 王振民 | It is capable of achieving the disposably lower triggered safety hemostix of quick assembling |
| CN108272461B (en) * | 2017-01-06 | 2020-07-31 | 天津华鸿科技股份有限公司 | lancet |
| CN106859670A (en) * | 2017-04-07 | 2017-06-20 | 王振民 | The anti-frightened anti-pollution safe strength blood taking needle of hypodynia sense brace type |
| CN107569243B (en) * | 2017-08-30 | 2021-03-19 | 天津华鸿科技股份有限公司 | Heel hemostix |
| CN108324290B (en) * | 2018-03-01 | 2023-11-21 | 皖南医学院 | Disposable touch-type safe and painless blood collection needle |
| CN110974252A (en) * | 2019-11-26 | 2020-04-10 | 苏州市开元医疗器械有限公司 | Novel spring fixing device of safe blood taking needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1380042A (en) * | 2001-04-13 | 2002-11-20 | “Pzhtl”股份有限公司 | Puncture device |
| CN1968651A (en) * | 2004-05-07 | 2007-05-23 | 贝克顿·迪金森公司 | Cam-actuated medical puncturing device and method |
| CN201379576Y (en) * | 2009-04-17 | 2010-01-13 | 张立波 | Disposable blood lancet |
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