CN204394532U - A kind of blood taking needle - Google Patents
A kind of blood taking needle Download PDFInfo
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- CN204394532U CN204394532U CN201420816913.6U CN201420816913U CN204394532U CN 204394532 U CN204394532 U CN 204394532U CN 201420816913 U CN201420816913 U CN 201420816913U CN 204394532 U CN204394532 U CN 204394532U
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- sliding sleeve
- housing
- needle
- bonnet
- blood taking
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Abstract
This utility model relates to medical instruments field, specifically discloses a kind of disposable blood taking needle.It draws together housing, needle body, syringe needle, sliding sleeve, the elastic component acting on needle body two ends respectively and bonnet, described sliding sleeve and housing are in axial sliding connection, it is characterized in that: the periphery of described needle body is installed with the along the circumferential direction uniform setting of at least 2 groups and along the axially extended guiding parts of needle body, described sliding sleeve is provided with the chute adapted with guiding parts, described bonnet is provided with the support member corresponding with guiding parts, and the end face of described supports support end is inclined-plane from bonnet rises on needle body direction or spiralling curved surface; Under original state, the two ends of described guiding parts offset near the end face of bonnet one end and the support end of support member with sliding sleeve respectively.Blood taking needle structure of the present utility model is simple, and its needle body can more promptly eject by sliding sleeve, and required thrust is less, the time is shorter, and the experience of user is better.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of disposable blood taking needle.
Background technology
At present, hospital all requires 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 complex structure degree is each variant, and patient experiences also different.
The Chinese utility model patent that the patent No. is " 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 need promote sliding sleeve to certain position; utilize the interaction principle on inclined-plane to realize the automatic rotation of needle body, thus syringe needle is released outside housing, and after having adopted blood; the syringe needle of blood taking needle can automatically retract in housing, ensures the safety of medical personnel and user.Although this blood taking needle meets the conventional user demand of hospital substantially, 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, and be also provided with inclined-plane in the end of short lead rail, the end of long guideway is provided with wedge angle; And on sliding sleeve, be not only provided with the gathering sill adapted with projection, be also provided with the long recess and short groove that adapt with two groups of guide rails, and the end of long recess is provided with snap fit.Conventional blood taking needle physical dimension is all less, and its housing and sliding sleeve all adopt injection molding, arrange 4 guide rails, and the length of guide rail and end shape are also not identical in undersized inner walls like this; In like manner, undersized sliding sleeve like this will arrange at least 6 grooves, and the shape of each groove is also different, this adds the difficulty of design injection mold, injection moulding and die sinking undoubtedly, and cause production efficiency lower, cost is larger.
(2) with reference to the detailed description of the invention in above-mentioned patent documentation and Fig. 3, Fig. 4, at promotion sliding sleeve in running in housing, first inclined-plane of its sliding sleeve and the second inclined-plane of projection interact, due to the interaction on two inclined-planes, needle body is had axially and the movement tendency rotated simultaneously, 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 simultaneously, can only move vertically.In the process of above-mentioned axially-movable, the thrust that sliding sleeve produces is disperseed by inclined-plane, just the axially-movable of partial action power to needle body serves impetus, and due to the rotary motion trend of needle body, frictional force between projection and short lead rail is larger, larger masterpiece certainly will be needed for sliding sleeve, the axially-movable of guarantee needle body.Due in above-mentioned use procedure, directly and the contact skin of user, the direct cognition of user is exactly that skin is pressed by very large power, causes comfortableness poor in one end that sliding sleeve stretches out housing.
(3) when needle body moves axially to the state shown in Fig. 5, the i.e. inclined plane alignment of the first inclined-plane of sliding sleeve and short lead rail, the tip on needle body second inclined-plane exceed the inclined plane of short lead rail most advanced and sophisticated time, needle body starts to rotate under the thrust of sliding sleeve and the elastic force combined effect of elastic component, in this process, between first inclined-plane of sliding sleeve and the second inclined-plane of projection, between the second inclined-plane and the inclined plane of short lead rail, all can produce larger frictional force, thus delayed the rotary motion trend of needle body, the time that needle body is ejected is elongated, causes the experience of user poor.
(4) depart from completely to the second inclined-plane of projection and the first inclined-plane of sliding sleeve in needle body rotation, when second inclined-plane only and the inclined plane of short lead rail interacts, its rotate needed for power only provided by the elastic force of elastic component, now can only by ensureing that the smooth degree on the second inclined-plane and inclined plane ensures that the second inclined-plane and inclined plane are slided disengaging completely, namely needle body ejects completely, higher requirement has been had thus to the injection surface quality of needle body and housing, when its surface is smooth not, easily there is the fault that needle body cannot eject.
Summary of the invention
The technical problems to be solved in the utility model is to provide that a kind of structure is simpler, the better disposable blood taking needle of experience.
In order to solve the problems of the technologies described above, this utility model is solved by following technical proposals: a kind of blood taking needle,
Comprise housing, needle body, syringe needle, sliding sleeve, the elastic component acting on needle body two ends respectively and bonnet, be provided with between described sliding sleeve and housing guide position limiter with make sliding sleeve can in housing the company of sliding axially, the periphery of described needle body is installed with along the axially extended guiding parts of needle body, described sliding sleeve is provided with the chute adapted with the shape of guiding parts, described bonnet is provided with the support member corresponding with the position of guiding parts and quantity, and the end face of described supports support end is inclined-plane from bonnet rises on needle body direction or spiralling curved surface; Under original state, one end of described guiding parts and the end face of sliding sleeve near bonnet one end offset, and the support end of the other end and support member offsets.
Further, described guide position limiter comprises to be located at guide limiting stopper on sliding sleeve outer wall and to be positioned at the guide and limit groove that inner walls matches 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 and limited step offset.
Further, described guide limiting stopper and chute are positioned on same shaft section.
Further, the position that described guiding parts contacts with the support end of support member is provided with chamfering or fillet.
Further, the opening part of described chute is provided with chamfering or fillet.
Further, described guiding parts comprises the projection one being positioned at sliding sleeve side and the projection two being positioned at support member side, and described projection two outer surface diameter is greater than the diameter of described projection one outer surface.
Further, described housing comprises 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 station terrace between described large aperture section and small-bore section, described guide and limit slot is in the inner surface of described small-bore section, and the accommodation projection two that is enough to of described guide and limit groove passes through; Described step surface is also provided with the stopper slot adapted with the shape of described projection two.
Further, what described bonnet embedded housing parts is circumferentially also provided with raised line, and the inwall of described housing is provided with the annular groove adapted with raised line.
Further, also comprise sheath, described sheath is sheathed in the small-bore section of described housing.
Further, also comprise needle guard, described needle guard is sheathed on syringe needle through described sheath and sliding sleeve successively.
Blood taking needle of the present utility model, compared with the blood taking needle being " ZL200920113395.0 ", has the following advantages with prior art Patent number:
(1) structure of its each parts is comparatively simple, and especially housing is compared with sliding sleeve with housing of the prior art with sliding sleeve, and its structure is more regular, and in injection molding process, designing mould, injection moulding and die sinking are all comparatively simple, and production efficiency is also higher.
(2) as long as sliding sleeve brings into operation, needle body rotates while movement vertically immediately under the spiral camber of supports support end or the guiding on inclined-plane, until the guiding parts moved on needle body enters chute, now under the effect of elastic component, syringe needle ejects at once, complete 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.In above-mentioned blood taking needle running, the thrust of sliding sleeve directly acts on the axial displacement direction of needle body, thrust is comparatively concentrated, and produce resistance without miscellaneous part and guiding parts effect, therefore needle body of the present utility model compared with prior art, can more promptly eject by sliding sleeve, and required thrust is less, the time is shorter, and thus the experience of user is better.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of embodiment blood taking needle;
Fig. 2 is the assembling schematic diagram after sheath removed by embodiment blood taking needle;
Fig. 3 is the assembling schematic diagram after the dismounting of blood taking needle shown in Fig. 2 housing;
Fig. 4 is the structural representation of sliding sleeve in the present embodiment;
Fig. 5 is the structural representation of the present embodiment middle shell;
The A-A sectional view that Fig. 6 is housing shown in Fig. 5;
Fig. 7 is the structural representation of needle body and syringe needle in the present embodiment;
Fig. 8 is the structural representation of bonnet in the present embodiment;
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-spring one, 6-spring two, 7-sheath, 8-needle guard.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the blood taking needle to the present embodiment is described in further detail.
As shown in Figure 1, a kind of blood taking needle of the present embodiment, includes housing 1, needle body 2, syringe needle 21, sliding sleeve 3, bonnet 4, spring 1, spring 26, sheath 7 and needle guard 8.The assembling mode of above-mentioned each parts referring to figs. 2 and 3, wherein syringe needle 21 is fixed in one end of needle body 2, bonnet 4 is located at one end of housing 1, sliding sleeve 3 one end is stretched out away from one end of bonnet 4 by housing 1, the two ends of its needle body 2 are connected with elastic component, and this elastic component comprises the spring 1 be connected with bonnet 4 and the spring 26 be connected with sliding sleeve 3.
As shown in Figure 4, needle body 2 periphery of the present embodiment is provided with along the axially extended guiding parts 20 of needle body 2, as preferably, in order to make the stress equalization of needle body 2, guiding parts 20 at least arranges 2 groups, and along the uniform setting of circumferencial direction of needle body 2, the guiding parts 20 in the present embodiment is 2 groups, and the quantity of this guiding parts 20 and position need meet the stress balance of needle body 2.Further, the guiding parts 20 of the present embodiment comprises projection 1 and projection 2 23, and wherein projection 2 23 outer surface diameter is greater than the diameter of projection 1 outer surface, and the object of so design is, in assembling process, more easily needle body 2 is fixed on original position.
As shown in Figure 7, the sliding sleeve 3 of the present embodiment is provided with the chute 32 adapted with the shape of guiding parts 20, this chute 32 is extended round about by the end face of sliding sleeve 32 near bonnet 4 one end, and chute 32 has opening 33 on the end face of sliding sleeve 3, this opening 33 is provided with chamfering or fillet, and what can guide guiding parts 20 more swimmingly enters chute 32.The end that above-mentioned sliding sleeve 3 passes housing 1 is also provided with the passage 34 holding syringe needle 21 and needle guard 8 and pass through.
As shown in Figure 5, Figure 6, the housing 1 of the present embodiment comprises large aperture section 11 and small-bore section 12, and forms the step surface 13 being positioned at housing 2 inside between large aperture section 11 and small-bore section 12.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, also guide position limiter is provided with between its sliding sleeve 3 and housing 1, this guide position limiter comprises to be located at guide limiting stopper on sliding sleeve 3 outer wall 31 and to be positioned at the guide and limit groove 14 that housing 1 inwall adapts with the shape of guide limiting stopper 31, and 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 is enough to accommodation projection 2 23 and guide limiting stopper 31 passes through.
As shown in Figure 6, position near guide and limit groove 14 on its step surface 13 is also provided with the stopper slot 15 adapted with the shape of projection 2 23, preferably, the opening of stopper slot 15 is bell mouth shape, correspondingly, the part that projection 2 23 enters stopper slot 15 is taper, and so design is convenient to projection 2 23 and is come in and gone out more easily stopper slot 14.
As shown in Figure 8, 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 inclined-plane from bonnet 4 rises on needle body 2 direction or spiralling curved surface.What its bonnet 4 embedded housing 1 part is circumferentially also provided with raised line 42, correspondingly, is provided with the annular groove 17 adapted with raised line 42 at the inwall of housing 1.
As shown in Figure 1, Figure 2, Fig. 3 is the assembling schematic diagram under the present embodiment blood taking needle original state.In an initial condition, spring 1 is in extended state, and spring 26 is in compressive state.Correspondingly, under the combined effect of spring 1 and spring 26 elastic force in the same way, 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 and the end face of sliding sleeve 3 offset, one end of projection 2 23 offsets with the higher position on spiral camber on the support end 41 of support member 40 or inclined-plane, and the other end of projection 2 23 is arranged in stopper slot 15.If do not have the participation of external force, its needle body 2 remains on above-mentioned confined state by under the effect of elastic component elastic force.
The blood taking needle of the present embodiment in use, the passage 34 of sliding sleeve 3 is aimed at the skin of user, then housing 1 is touched to user direction, then the inside to housing 1 is axially slided by sliding sleeve 3, by the end face of sliding sleeve 3, thrust is passed on the projection 1 of needle body 2 vertically, and then orders about needle body 2 and move axially, due to the guiding function on projection 2 23 spiral camber or inclined-plane on support end 41, carry out radial motion while needle body 2 is moved axially, form the rotation of needle body 2.In the process, projection 2 23 by exiting in stopper slot 15 until enter in guide and limit groove 14; Meanwhile, projection 1 rotates to departing from the end face of sliding sleeve 3 and entering in chute 32 relative to the end face of sliding sleeve 3.
In above process, spring 1 continues to be stretched, spring 26 continues to be compressed, when projection 2 23 enters guide and limit groove 14 and projection 1 enters after in chute 32, under the resilient force of spring 1 and spring 26, needle body 2 is rapidly to user and ejects, and syringe needle 21 thrusts user skin, completes blood sampling action.Under the momentary status completing blood sampling action, spring 1 is compressed, and spring 26 is stretched, and when sliding sleeve 3 leaves the skin of user, its syringe needle 21 is under the resilient force of spring 1 and spring 26, and automatic retraction, in sliding sleeve 3, is avoided pricking staff by mistake.
The blood taking needle of the present embodiment also comprises 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 comprise needle guard 8, this needle guard 8 is through sheath 7 and sliding sleeve 3 and be sheathed on syringe needle 21.
In a word; the foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (11)
1. a blood taking needle, comprise housing (1), needle body (2), syringe needle (21), sliding sleeve (3),
Act on elastic component and the bonnet (4) at needle body (2) two ends respectively, be provided with guide position limiter between described sliding sleeve (3) and housing (1) to slide axially in housing (1) to make sliding sleeve (3), it is characterized in that: the periphery of described needle body (2) is installed with along the axially extended guiding parts of needle body (20), described sliding sleeve (3) is provided with the chute (32) adapted with the shape of guiding parts (20), described bonnet (4) is provided with the support member (40) corresponding with the position of guiding parts (20) and quantity, the end face of described support member (40) support end (41) is inclined-plane from bonnet rises on needle body direction or spiralling curved surface, under original state, one end of described guiding parts (20) and the end face of sliding sleeve (3) near bonnet (4) one end offset, and the support end (41) of the other end and support member (40) offsets.
2. according to blood taking needle according to claim 1, it is characterized in that: described guide position limiter comprises the guide limiting stopper (31) be located on sliding sleeve (3) outer wall and is positioned at the guide and limit groove (14) that housing (1) inwall matches with guide limiting stopper (31), described guide and limit groove (14) is provided with limited step (16) away from one end of bonnet (4), under original state, described guide limiting stopper (31) and limited step (16) offset.
3. according to blood taking needle according to claim 2, it is characterized in that: described guide limiting stopper (31) and chute (32) are positioned on same shaft section.
4. according to blood taking needle according to claim 1, it is characterized in that: the position that described guiding parts (20) contacts with the support end (41) of support member (40) is provided with chamfering or fillet.
5. according to blood taking needle according to claim 1, it is characterized in that: the opening part of described chute (32) is provided with chamfering or fillet.
6. according to the blood taking needle described in any one of claim 1-5, it is characterized in that: described guiding parts (20) comprises the projection one (22) being positioned at sliding sleeve (3) side and the projection two (23) being positioned at support member (40) side, described projection two (23) outer surface diameter is greater than the diameter of described projection one (22) outer surface.
7. according to blood taking needle according to claim 6, it is characterized in that: described housing (1) comprises large aperture section (11) and small-bore section (12), described bonnet (4) is positioned at the free end of the large aperture section (11) of housing (1), described sliding sleeve (3) is passed by the free end of housing small-bore section (12) away from one end of bonnet (4), forming station terrace (13) between described large aperture section and small-bore section, described guide and limit groove (14) is positioned at the inner surface of described small-bore section (12), and described guide and limit groove (14) be enough to hold projection two (23) pass through, described step surface (13) is also provided with the stopper slot (15) adapted with the shape of described projection two (23).
8., according to the blood taking needle described in any one of claim 1-5, it is characterized in that: described bonnet (4) embed housing (1) part be circumferentially also provided with raised line (42), the inwall of described housing (1) is provided with the annular groove (17) adapted with raised line (42).
9., according to blood taking needle according to claim 7, it is characterized in that: described bonnet (4) embed housing (1) part be circumferentially also provided with raised line (42), the inwall of described housing (1) is provided with the annular groove (17) adapted with raised line (42).
10. according to blood taking needle according to claim 1, it is characterized in that: also comprise sheath (7), described sheath (7) is sheathed in the small-bore section (12) of described housing (1).
11. according to the blood taking needle described in claim 9 or 10, it is characterized in that: also comprise needle guard (8), described needle guard (8) is sheathed on syringe needle (21) through described sheath (7) and sliding sleeve (3) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420816913.6U CN204394532U (en) | 2014-12-22 | 2014-12-22 | A kind of blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420816913.6U CN204394532U (en) | 2014-12-22 | 2014-12-22 | A kind of blood taking needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204394532U true CN204394532U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420816913.6U Active CN204394532U (en) | 2014-12-22 | 2014-12-22 | A kind of blood taking needle |
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| CN (1) | CN204394532U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109259773A (en) * | 2018-10-19 | 2019-01-25 | 宁波美生医疗器材有限公司 | A kind of push type blood taking needle |
| CN113925507A (en) * | 2020-07-13 | 2022-01-14 | 江苏康健医疗用品有限公司 | Disposable tip blood taking needle |
| WO2022198440A1 (en) * | 2021-03-23 | 2022-09-29 | 苏州市开元医疗器械有限公司 | Press-type blood lancet |
-
2014
- 2014-12-22 CN CN201420816913.6U patent/CN204394532U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109259773A (en) * | 2018-10-19 | 2019-01-25 | 宁波美生医疗器材有限公司 | A kind of push type blood taking needle |
| CN109259773B (en) * | 2018-10-19 | 2024-06-11 | 宁波美生医疗器材有限公司 | Push type blood taking needle |
| CN113925507A (en) * | 2020-07-13 | 2022-01-14 | 江苏康健医疗用品有限公司 | Disposable tip blood taking needle |
| WO2022198440A1 (en) * | 2021-03-23 | 2022-09-29 | 苏州市开元医疗器械有限公司 | Press-type blood lancet |
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| C14 | Grant of patent or utility model | ||
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| CP03 | Change of name, title or address |
Address after: No. 1, No. 12, Longtan Road, front street, Cang Qian street, Yuhang District, Hangzhou, Zhejiang Patentee after: Hangzhou Puang Medical Technology Co., Ltd. Address before: 311121 Haishu Road, Hangzhou, Yuhang District, Hangzhou, Zhejiang Patentee before: Hangzhou Pu Ang medical science and technology company limited |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 8 / F, building 1, 1388 cangxing street, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Puang (Hangzhou) Medical Technology Co.,Ltd. Address before: 311121 1 tower 1, Longtan Road, Cang Qian street, Yuhang District, Hangzhou, Zhejiang Patentee before: PU'ANG (HANGZHOU) MEDICAL TECHNOLOGY Co.,Ltd. |