CN104490406B - A kind of guiding propulsive mechanism and blood taking needle - Google Patents
A kind of guiding propulsive mechanism and blood taking needle Download PDFInfo
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- CN104490406B CN104490406B CN201410800804.XA CN201410800804A CN104490406B CN 104490406 B CN104490406 B CN 104490406B CN 201410800804 A CN201410800804 A CN 201410800804A CN 104490406 B CN104490406 B CN 104490406B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 230000001141 propulsive effect Effects 0.000 title claims abstract description 35
- 239000008280 blood Substances 0.000 title claims abstract description 32
- 210000004369 blood Anatomy 0.000 title claims abstract description 32
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000010241 blood sampling Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/14—Devices for taking samples of blood ; Measuring characteristics of blood in vivo, e.g. gas concentration within the blood, pH-value of blood
- A61B5/1405—Devices for taking blood samples
- A61B5/1411—Devices for taking blood samples by percutaneous method, e.g. by lancet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/15058—Joining techniques used for protective means
- A61B5/150595—Joining techniques used for protective means by snap-lock (i.e. based on axial displacement)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150732—Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention relates to medical instruments field, specifically disclose practical the guiding propulsive mechanism and there is the blood taking needle of this guiding propulsive mechanism of a kind of blood taking needle.As long as the sliding sleeve of above-mentioned guiding propulsive mechanism brings into operation, needle body rotates while being axially moveable immediately under the spiral camber of supports support end or the guiding on inclined-plane, until the guiding parts run to needle body enters chute, now under the effect of elastic component, needle body ejects at once, putting on the thrust on sliding sleeve when releasing, needle body is under the effect of elastic component among automatic retraction sliding sleeve.In above-mentioned blood taking needle running, the thrust of sliding sleeve directly acts on the axial direction of displacement of needle body, and thrust is more concentrated, and produces resistance without miscellaneous part and guiding parts effect, and whole progradation is exerted oneself the least.The blood taking needle of the present invention is in blood collection procedure, and directly experiencing to user is exactly that active force is less, speed, and experience is more preferable compared with the blood taking needle of prior art.
Description
Technical field
The present invention relates to medical instruments field, be specifically related to practical the guiding propulsive mechanism and there is the blood taking needle of this guiding propulsive mechanism of a kind of blood taking needle.
Background technology
At present, hospital is required to use the disposable blood taking needle of syringe needle auto retractable after blood sampling, to avoid between patient cross infection and to prevent medical personnel from being pricked by mistake.The common disposable blood taking needle in market is of a great variety, and structure complexity is each variant, and patient experiences the most different.
The Chinese utility model patent of Patent No. " ZL200920113395.0 " discloses a kind of blood taking needle; this blood taking needle includes housing, needle body, syringe needle, sliding sleeve, elastic component, bonnet and protective cap; during use; only sliding sleeve need to be promoted to certain position; the interaction principle utilizing inclined-plane realizes the automatic rotation of needle body, thus outside syringe needle is released housing, and after having adopted blood; the syringe needle of blood taking needle can automatically retract in housing, it is ensured that medical personnel and the safety of user.Although this blood taking needle substantially meets the conventional use demand of hospital, but there is also certain defect, specific as follows:
(1) inner walls is provided with two groups of guide rails, and the length of two groups of guide rails is different, is additionally provided with inclined-plane in the end of short lead rail, and the end of long guideway is provided with wedge angle；And on sliding sleeve, it is not only provided with the gathering sill adapted with projection, it is additionally provided with the long recess adapted with two groups of guide rails and short groove, and the end of long recess is provided with snap fit.Conventional blood taking needle physical dimension is the least, and its housing and sliding sleeve all use injection molding, arrange 4 guide rails in such undersized inner walls, and the length of guide rail and end shape also differ；In like manner, to arrange at least 6 grooves, and the shape of each groove is the most different on such undersized sliding sleeve, this adds design injection mold, injection and the difficulty of die sinking undoubtedly, causes production efficiency relatively low, and cost is bigger.
(2) with reference to the detailed description of the invention in above-mentioned patent documentation and Fig. 3, Fig. 4, promoting sliding sleeve in running in housing, first inclined-plane of its sliding sleeve interacts with the second inclined-plane of projection, interaction due to two inclined-planes, make the movement tendency that needle body has axially simultaneously and rotates, but as shown in Figure 4, its two projection contacts with the short lead rail in housing respectively, under the barrier effect of short lead rail, although needle body has the trend of axially-movable and rotary motion, but can only be axially movable simultaneously.During above-mentioned axially-movable, the thrust that sliding sleeve produces is disperseed by inclined-plane, simply partial action power serves impetus to the axially-movable of needle body, and due to the rotary motion trend of needle body, frictional force between projection and short lead rail is bigger, bigger power certainly will be needed to act on sliding sleeve, the axially-movable of guarantee needle body.During above-mentioned use, sliding sleeve stretches out one end of housing directly and the contact skin of user, and the directly cognition of user is exactly that skin is pressed by the biggest power, causes comfortableness poor.
(3) state shown in Fig. 5 is moved axially to when needle body, the i.e. inclined plane alignment of the first inclined-plane of sliding sleeve and short lead rail, needle body the second inclined-plane tip beyond the inclined plane tip of short lead rail time, needle body starts to rotate under the thrust of sliding sleeve and the elastic force of elastic component act on jointly, in this process, bigger frictional force all can be produced between first inclined-plane and second inclined-plane of projection of sliding sleeve, between the second inclined-plane and the inclined plane of short lead rail, thus delayed the rotary motion trend of needle body, the time that needle body is ejected is elongated, and the experience causing user is poor.
Rotate at needle body and completely disengage to the second inclined-plane of projection and the first inclined-plane of sliding sleeve, when the inclined plane of the second inclined-plane and short lead rail interacts, power needed for it rotates only is provided by the elastic force of elastic component, now can only ensure that by ensureing the smooth degree on the second inclined-plane and inclined plane the second inclined-plane and inclined plane are slided disengaging completely, i.e. needle body ejects completely, thus the injection surface quality of needle body and housing there is higher requirement, in the case of its surface is the most smooth, easily there is the fault that needle body cannot eject.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of blood taking needle guiding propulsive mechanism and having this guiding propulsive mechanism, to overcome the defect of prior art.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is as follows: a kind of guiding propulsive mechanism, including housing, needle body, sliding sleeve, elastic component and bonnet, one end of housing it is covered on after described, it is provided with guide position limiter between described sliding sleeve and housing so that sliding sleeve can slide axially in housing, and one end of described sliding sleeve is passed away from one end of bonnet by housing；The periphery of described needle body is installed with along the axially extended guiding parts of needle body, and described sliding sleeve is provided with the chute that the shape with guiding parts adapts；Described bonnet is provided with the position with guiding parts and the corresponding support member of quantity, and the end face of this supports support end is the inclined-plane or spiralling curved surface risen on needle body direction from bonnet；Described elastic component includes the first elastic component being located between needle body front end and sliding sleeve and the second elastic component being located between needle body tail end and bonnet；Under original state, one end of described guiding parts offsets near the end face of bonnet one end with sliding sleeve, and the support end of the other end and support member offsets, and the elastic force of described first elastic component and the second elastic component is ordered about needle body and had the movement tendency away from bonnet.
Further, described guide position limiter includes the guide limiting stopper being located on sliding sleeve outer wall and is positioned in inner walls the guide and limit groove matched with guide limiting stopper, described guide and limit groove is provided with limited step away from one end of bonnet, under original state, described guide limiting stopper offsets with limited step.
Further, described guiding parts includes the projection one being positioned at sliding sleeve side and is positioned at the projection two of support member side, and described projection two outer surface diameter is more than the diameter of described projection one outer surface.
Further, described housing includes large aperture section and small-bore section, described bonnet is positioned at the free end of the large aperture section of housing, described sliding sleeve is passed by the free end of housing small-bore section away from one end of bonnet, step surface is formed between described large aperture section and small-bore section, described guide and limit groove is positioned at the inner surface of described small-bore section, and described guide and limit groove be enough to accommodate projection two and passes through；The stopper slot that the shape with described projection two adapts it is additionally provided with on described step surface.
Further, described bonnet embeds and is additionally provided with raised line on the circumference of housing parts, and the inwall of described housing is provided with the annular groove adapted with raised line.
Further, described guiding parts is at least provided with 2, and multiple guiding parts is along the uniform setting of circumferencial direction of needle body.
Further, the position that described guiding parts contacts with the support end of support member is provided with chamfering or fillet.
Further, described chute has opening at sliding sleeve on the end face of bonnet one end, and described opening is provided with chamfering or fillet.
A kind of blood taking needle, including above-mentioned guiding propulsive mechanism, described needle body is provided with syringe needle, and described sliding sleeve stretches out the end face of shell one end and is provided with the passage that receiving syringe needle passes through.
Further, also including sheath and needle guard, described sheath can be sheathed on described housing by sliding sleeve side, described can sequentially pass through described sheath and sliding sleeve by needle guard, and is sheathed on syringe needle.
The guiding propulsive mechanism of the present invention, the structure of its each parts is relatively simple, especially housing with sliding sleeve compared with housing of the prior art and sliding sleeve, its structure is the most regular, in injection molding process, design mould, injection and die sinking are the most relatively simple, and production efficiency is the highest.
In addition, in the guiding propulsive mechanism of the present invention, as long as sliding sleeve brings into operation, needle body rotates while being axially moveable immediately under the spiral camber of supports support end or the guiding on inclined-plane, until the guiding parts run to needle body enters chute, now under the effect of elastic component, needle body ejects at once, putting on the thrust on sliding sleeve when releasing, needle body is under the effect of elastic component among automatic retraction sliding sleeve.In above-mentioned blood taking needle running, the thrust of sliding sleeve directly acts on the axial direction of displacement of needle body, and thrust is more concentrated, and produces resistance without miscellaneous part and guiding parts effect, and whole progradation is exerted oneself the least.
Having the blood taking needle of above-mentioned guiding propulsive mechanism operationally, the active force that sliding sleeve acts on user skin is less, and after completing blood sampling action, sliding sleeve leaves the skin of user, and syringe needle is under the effect of elastic component among automatic retraction sliding sleeve.It is exactly that active force is less that above-mentioned blood collection procedure is directly experienced to user, speed, and experience is more preferable compared with the blood taking needle of prior art.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present embodiment guides propulsive mechanism；
Fig. 2 is that the present embodiment guides propulsive mechanism in an initial condition, removes the assembling schematic diagram after housing；
Fig. 3 is that the present embodiment guides the structural representation of sliding sleeve in propulsive mechanism；
Fig. 4 is that the present embodiment guides the structural representation of bonnet in propulsive mechanism；
Fig. 5 is the structural representation that the present embodiment guides propulsive mechanism middle shell；
Fig. 6 is the A-A sectional view of housing shown in Fig. 5；
Fig. 7 is that the present embodiment guides the structural representation of needle body in propulsive mechanism；
Fig. 8 is the explosive state schematic diagram with the blood taking needle that the present embodiment guides propulsive mechanism；
Description of reference numerals: 1-housing, 11-large aperture section, 12-small-bore section, 13-step surface, 14-guide and limit groove, 15-stopper slot, 16-limited step, 17-annular groove, 2-needle body, 20-guiding parts, 21-syringe needle, 22-projection one, 23-projection two, 3-sliding sleeve, 31-guide limiting stopper, 32-chute, 33-opening, 34-passage, 4-bonnet, 40-support member, 41-support end, 42-raised line, 5-the first elastic component, 6-the second elastic component, 7-sheath, 8-needle guard.
Detailed description of the invention
With detailed description of the invention the present embodiment guided propulsive mechanism below in conjunction with the accompanying drawings and there is the blood taking needle of this guiding propulsive mechanism is described in further detail.
As shown in Figure 1 and Figure 2, including housing 1, needle body 2, sliding sleeve 3, elastic component and bonnet 4, wherein bonnet 4 is located at one end of housing 1, between sliding sleeve 3 and housing 1, it is provided with guide position limiter so that sliding sleeve 3 can slide axially in housing 1, and one end of sliding sleeve 3 is passed away from one end of bonnet 4 by housing 1.Wherein elastic component includes the first elastic component 5 being located between needle body 2 front end and sliding sleeve 3 and the second elastic component 6 being located between needle body 2 tail end and bonnet 4.As preferably, above-mentioned first elastic component 5 and the second elastic component 6 all select compression spring.
As shown in Fig. 2, Fig. 7, the periphery of needle body 2 is installed with along the axially extended guiding parts of needle body 2 20.Further, in order to ensure the stress balance of needle body 2, above-mentioned guiding parts 20 is at least provided with 2, and multiple guiding parts 20 is along the uniform setting of circumferencial direction of needle body 2, and in the present embodiment, the quantity of guiding parts 20 is 2.The structure of a kind of preferred needle body 2 is as shown in Figure 7, wherein guiding parts 20 includes projection 1 and projection 2 23, and wherein projection 2 23 outer surface diameter is more than the diameter of projection 1 outer surface, and the purpose being so designed that is, during assembling, more easily needle body 2 is fixed on original position.Further, for reducing the frictional force between guiding parts 20 and bonnet 4 support end, the position that this guiding parts 20 and support member offset is provided with fillet or chamfering.
As shown in Figure 3, the sliding sleeve 3 of the present embodiment is provided with the chute 32 that the shape with guiding parts 20 adapts, this chute 32 is extended near the end face of bonnet 4 one end round about by sliding sleeve 32, and chute 32 has opening 33 on the end face of sliding sleeve 3, this opening 33 is provided with chamfering or fillet, can guide the entrance chute 32 of guiding parts 20 more swimmingly.The end that above-mentioned sliding sleeve 3 passes housing 1 is additionally provided with passage 34.
As shown in Figure 4, the bonnet 4 of the present embodiment is provided with the support member 40 corresponding with the position of guiding parts 20 and quantity, and the end face of this support member 40 support end 41 is the inclined-plane or spiralling curved surface risen on needle body 2 direction from bonnet 4.Its bonnet 4 embeds and is additionally provided with raised line 42 on the circumference of housing 1 part, and correspondingly, the inwall at housing 1 is provided with the annular groove 17 adapted with raised line 42.
As shown in Figure 5, Figure 6, the housing 1 of the present embodiment includes being formed between large aperture section 11 and small-bore section 12, and large aperture section 11 and small-bore section 12 being positioned at the step surface 13 within housing 2.And bonnet 4 is positioned at the free end of housing 1 large aperture section 11, sliding sleeve 3 is passed by the free end of housing 1 small-bore section 12.
Further, it is additionally provided with guide position limiter between its sliding sleeve 3 and housing 1, guide limiting stopper 31 that this guide position limiter includes being located on sliding sleeve 3 outer wall and be positioned on housing 1 inwall the guide and limit groove 14 that the shape with guide limiting stopper 31 adapts, this guide and limit groove 14 is provided with limited step 16 away from one end of bonnet 4.Further, guide and limit groove 14 is positioned at the inwall of small-bore section 12, and guide and limit groove 14 be enough to accommodate projection 2 23 and guide limiting stopper 31 passes through.
As shown in Figure 6, on its step surface 13, the position near guide and limit groove 14 is additionally provided with the stopper slot 15 that the shape with projection 2 23 adapts, preferably, the opening of stopper slot 15 is bell mouth shape, correspondingly, it is taper that projection 2 23 enters the part of stopper slot 15, is so designed that being easy to projection 2 23 more easily comes in and goes out stopper slot 14.
Fig. 1, Fig. 2 show the assembling schematic diagram under the present embodiment blood taking needle original state.In an initial condition, the first elastic component 5 is in extended state, and the second elastic component 6 is in compressive state.Correspondingly, under the common effect of the first elastic component 5 and the second elastic component 6 elastic force in the same direction, the guide limiting stopper 31 of sliding sleeve 3 offsets with the limited step 16 of guide and limit groove 14, one end of projection 1 offsets with the end face of sliding sleeve 3, one end of projection 2 23 offsets with the higher position of spiral camber on the support end 41 of support member 40 or inclined-plane, and the other end of projection 2 23 is positioned in stopper slot 15.Without the participation of external force, its needle body 2 will be maintained at above-mentioned confined state under the effect of elastic component elastic force.
Fig. 8 show a kind of blood taking needle that have employed above-mentioned guiding propulsive mechanism, in use, passage 34 by sliding sleeve 3 is directed at the skin of user, then housing 1 is touched to user direction, then sliding sleeve 3 axially will slide to the inside of housing 1, by the end face of sliding sleeve 3, thrust is transferred on the projection 1 of needle body 2 vertically, and then order about needle body 2 and move axially, due to projection 2 23 spiral camber or guiding function on inclined-plane on support end 41, make needle body 2 while moving axially, carry out radial motion, form the rotation of needle body 2.In the process, projection 2 23 is by exiting in stopper slot 15 until entering in guide and limit groove 14；Meanwhile, projection 1 rotates to the end face with sliding sleeve 3 relative to the end face of sliding sleeve 3 and departs from and enter in chute 32.
In above process, first elastic component 5 is persistently stretched, second elastic component 6 continues to be compressed, after projection 2 23 enters guide and limit groove 14 and projection 1 enters in chute 32, under the resilient force of the first elastic component 5 and the second elastic component 6, needle body 2 ejects to user rapidly, and syringe needle 21 thrusts user skin, completes blood sampling action.Under the momentary status completing blood sampling action, the first elastic component 5 is compressed, and the second elastic component 6 is stretched, when sliding sleeve 3 leaves the skin of user, its syringe needle 21, under the resilient force of the first elastic component 5 and the second elastic component 6, is retracted in sliding sleeve 3 automatically, it is to avoid prick staff by mistake.
The blood taking needle of the present embodiment also includes sheath 7, and this sheath 7 is sheathed in the small-bore section of housing 1, and for after original state and blood sampling, anti-anti-skid sheath 3 is pressed, thus triggers disposable blood taking needle.Further, also including needle guard 8, this needle guard 8 passes sheath 7 and sliding sleeve 3 and is sheathed on syringe needle 21.
In a word, the foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (12)
1. one kind guides propulsive mechanism, it is characterized in that, including housing, needle body, sliding sleeve, elastic component and bonnet, one end of housing it is covered on after described, it is provided with guide position limiter between described sliding sleeve and housing so that sliding sleeve can slide axially in housing, and one end of described sliding sleeve is passed away from one end of bonnet by housing；
The periphery of described needle body is installed with along the axially extended guiding parts of needle body, and described sliding sleeve is provided with the chute that the shape with guiding parts adapts；
Described bonnet is provided with the position with guiding parts and the corresponding support member of quantity, and the end face of this supports support end is the inclined-plane or spiralling curved surface risen on needle body direction from bonnet；
Described elastic component includes the first elastic component being located between needle body front end and sliding sleeve and the second elastic component being located between needle body tail end and bonnet；
Under original state, one end of described guiding parts offsets near the end face of bonnet one end with sliding sleeve, and the support end of the other end and support member offsets, and the elastic force of described first elastic component and the second elastic component is ordered about needle body and had the movement tendency away from bonnet.
2. according to the guiding propulsive mechanism described in claim 1, it is characterized in that, described guide position limiter includes the guide limiting stopper being located on sliding sleeve outer wall and is positioned in inner walls the guide and limit groove matched with guide limiting stopper, described guide and limit groove is provided with limited step away from one end of bonnet, under original state, described guide limiting stopper offsets with limited step.
3. according to the guiding propulsive mechanism described in claim 1, its feature exists, and described guiding parts includes the projection one being positioned at sliding sleeve side and is positioned at the projection two of support member side, and described projection two outer surface diameter is more than the diameter of described projection one outer surface.
4. according to the guiding propulsive mechanism described in claim 2, its feature exists, and described guiding parts includes the projection one being positioned at sliding sleeve side and is positioned at the projection two of support member side, and described projection two outer surface diameter is more than the diameter of described projection one outer surface.
5. according to the guiding propulsive mechanism described in claim 4, its feature exists, described housing includes large aperture section and small-bore section, described bonnet is positioned at the free end of the large aperture section of housing, described sliding sleeve is passed by the free end of housing small-bore section away from one end of bonnet, forming step surface between described large aperture section and small-bore section, described guide and limit groove is positioned at the inner surface of described small-bore section, and described guide and limit groove be enough to accommodate projection two and passes through；The stopper slot that the shape with described projection two adapts it is additionally provided with on described step surface.
6. according to the guiding propulsive mechanism described in claim 1, it is characterised in that described bonnet embeds and is additionally provided with raised line on the circumference of housing parts, and the inwall of described housing is provided with the annular groove adapted with raised line.
7. according to the guiding propulsive mechanism described in any one of claim 1-6, it is characterised in that described guiding parts is at least provided with 2, and multiple guiding parts is along the uniform setting of circumferencial direction of needle body.
8. according to the guiding propulsive mechanism described in claim 7, it is characterised in that the position that described guiding parts contacts with the support end of support member is provided with chamfering or fillet.
9. according to the guiding propulsive mechanism described in claim 7, it is characterised in that described chute has opening at sliding sleeve on the end face of bonnet one end, and described opening is provided with chamfering or fillet.
10. according to the guiding propulsive mechanism described in any one of claim 1-6 or 8, it is characterised in that described chute has opening at sliding sleeve on the end face of bonnet one end, and described opening is provided with chamfering or fillet.
11. 1 kinds of blood taking needles, it is characterised in that include the guiding propulsive mechanism described in any one of claim 1-10, described needle body is provided with syringe needle, and described sliding sleeve stretches out the end face of shell one end and is provided with the passage that receiving syringe needle passes through.
12. according to a kind of blood taking needle described in claim 11, it is characterised in that also include sheath and needle guard, and described sheath can be sheathed on described housing by sliding sleeve side, and described needle guard sequentially passes through described sheath and sliding sleeve, and is sheathed on syringe needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800804.XA CN104490406B (en) | 2014-12-22 | 2014-12-22 | A kind of guiding propulsive mechanism and blood taking needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800804.XA CN104490406B (en) | 2014-12-22 | 2014-12-22 | A kind of guiding propulsive mechanism and blood taking needle |
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| Publication Number | Publication Date |
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| CN104490406A CN104490406A (en) | 2015-04-08 |
| CN104490406B true CN104490406B (en) | 2016-11-30 |
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| CN201410800804.XA Active CN104490406B (en) | 2014-12-22 | 2014-12-22 | A kind of guiding propulsive mechanism and blood taking needle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3868297A4 (en) * | 2018-10-19 | 2022-07-06 | Ningbo Medsun Medical Co., Ltd. | Press-type blood lancet |
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| CN109316195B (en) * | 2017-10-12 | 2021-08-03 | 江西丰临医疗科技股份有限公司 | Safety hemostix |
| CN107638183B (en) * | 2017-10-30 | 2023-12-26 | 广东龙心医疗器械有限公司 | Fluid delivery device with retractable needle |
| CN108420444B (en) * | 2018-05-23 | 2024-04-16 | 淮安市天达医疗器械有限公司 | Push type hemostix |
| CN112472080B (en) * | 2020-10-21 | 2022-11-22 | 苏州施莱医疗器械有限公司 | Blood sampling device with needle unloading pause and cap pricking convenience |
| CN114667098B (en) * | 2021-03-23 | 2025-01-10 | 苏州市开元医疗器械有限公司 | A push-type blood collection needle |
| CN116869528A (en) * | 2023-08-01 | 2023-10-13 | 苏州施莱医疗器械有限公司 | Blood collector is pressed to rotatory afterbody of nook closing member |
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| Publication number | Publication date |
|---|---|
| CN104490406A (en) | 2015-04-08 |
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