CN206372356U - Filter injection needle - Google Patents
Filter injection needle Download PDFInfo
- Publication number
- CN206372356U CN206372356U CN201621124618.XU CN201621124618U CN206372356U CN 206372356 U CN206372356 U CN 206372356U CN 201621124618 U CN201621124618 U CN 201621124618U CN 206372356 U CN206372356 U CN 206372356U
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- CN
- China
- Prior art keywords
- check valve
- needle stand
- valve
- rear end
- madial wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 241001149930 Protura <class> Species 0.000 claims description 19
- 238000009827 uniform distribution Methods 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 abstract description 4
- 241000700605 Viruses Species 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 241001411320 Eriogonum inflatum Species 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003182 parenteral nutrition solution Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides filtering injection needle, including draw point, upper needle stand, lower needle stand, check valve, sealing gasket and filter membrane, upper needle stand rear end is provided with lower needle stand chamber and unidirectional valve pocket, unidirectional valve pocket includes truncated cone-shaped madial wall and inner cylindrical sidewall, truncated cone-shaped madial wall small end end face is provided with annular groove, annular groove center is connected with draw point mounting hole, the big end of truncated cone-shaped madial wall is connected with inner cylindrical sidewall, truncated cone-shaped madial wall is provided with the groove being connected with annular groove, annular groove bottom is vertically provided with set square, lower needle stand front end is provided with connecting portion, the center of connecting portion is provided with valve element, filter membrane is arranged at valve element rear end end, check valve cylinder is set on valve element, sealing gasket is arranged on the front end of the end check valve cylinder of valve element, the lower needle stand intracavitary portion of connecting portion insertion and the interference fit between lower needle stand chamber.The filtering of the utility model filtering injection needle and injection process are automatically carried out, it is not necessary to change syringe needle, it is to avoid the possibility of bacterium and virus pollution.
Description
Technical field
The utility model belongs to medical instruments field, and injection needle is filtered more particularly, to one kind.
Background technology
It is well known that be encapsulated at present the injection of Clinical practice in vial more, with the syringe needle of syringe prick rubber stopper or
When vial extraction decoction is cut with emery wheel, bottle stopper material bits or glass powder can enter in parenteral solution.Traditional syringe does not have
There is filtering function, these impurity can be extracted into syringe when extracting liquid medicine and direct injection is to patient, so as to induce quiet
The diseases such as arteries and veins inflammation.
Chinese utility model patent application CN102600535A, discloses a kind of injection needle with accurate filter, including
Needle tubing and the needle stand with inner via hole, the needle stand inner via hole is including the larger bottom in the less top in aperture, aperture and has
The pars intermedia of reduced bore structure is gradually collected upwards, and described needle tubing one end is placed in the top of the inner via hole, the needle stand
A filter is provided with inner via hole.Because the injection needle feed pathway and liquid outlet channel are same passages, need after filtration
Change in injection needle, but filtering needle and injection needle Renewal process and exist by the risk of the pollution of bacterium or virus again,
Clinical manipulation is also inconvenient simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of filtering injection needle simple in construction, easy to operate, safe and reliable, note
Syringe needle need not be changed when penetrating, it is to avoid the possibility of bacterium and virus pollution.
The technical solution of the utility model is：
Injection needle, including draw point, upper needle stand, lower needle stand, check valve, sealing gasket and filter membrane are filtered, draw point is arranged on
The front end of upper needle stand, the rear end of lower needle stand is connected on the conehead of syringe, and the upper needle stand rear end is provided with lower needle stand chamber and list
To valve pocket, unidirectional valve pocket includes truncated cone-shaped madial wall and inner cylindrical sidewall, and the small end end face of truncated cone-shaped madial wall is provided with annular
Groove, center and the draw point mounting hole of annular groove are connected, and the big end of truncated cone-shaped madial wall is connected with inner cylindrical sidewall,
Truncated cone-shaped madial wall is provided with groove, and one end of groove is connected with annular groove, and annular groove bottom is vertically provided with isoceles triangle
The set square of shape, the two ends on set square base are connected with annular groove bottom respectively, and the rear end of the lower needle stand is provided with conehead
Chamber, the front end of lower needle stand is provided with columnar connecting portion, and the center of connecting portion is provided with columnar valve element, the rear end of valve element and cone
The front end of head cavity is connected, and the check valve includes check valve cylinder and check valve frustum, the small end and check valve of check valve frustum
The front end of cylinder is connected, and the filter membrane is circle, and filter membrane is arranged at the rear end end of valve element, and check valve cylinder is set in
On valve element, the side surface of check valve frustum is engaged with unidirectional valve pocket truncated cone-shaped madial wall, and the sealing gasket is arranged on valve element
The front end of end check valve cylinder, the drift angle of the set square is in contact with the preceding surface of sealing gasket, after sealing gasket surface with it is unidirectional
The front end surface of valve cylinder body is in contact, the lower needle stand intracavitary portion of connecting portion insertion and the interference fit between lower needle stand chamber.
The diameter of the filter membrane is equal to the external diameter of valve element.
The filter membrane is pasted onto the rear end end of valve element.
Circumference uniform distribution is provided with multiple grooves on truncated cone-shaped madial wall.
Circumference uniform distribution is provided with 4 grooves on truncated cone-shaped madial wall, and the set square is parallel with two relative grooves, institute
The base length of side for stating set square is equal to the external diameter of annular groove.
The width of the groove is more than the thickness of set square.
The internal diameter of the inner cylindrical sidewall is less than the internal diameter of lower needle stand chamber.
The rear end of the valve element is provided with columnar valve core case, and the external diameter of valve core case is more than the external diameter of valve element, valve core case
Internal diameter is equal to the internal diameter of valve element, and the rear end of valve core case is connected with the front end of conehead chamber, and the filter membrane is arranged on after valve core case
Hold end.The back end circumference of the valve core case is laid with multiple connecting corners, the end of a right-angle side of connecting corner with
Valve element base rear end is connected, and the end of another right-angle side of connecting corner is connected with conehead chamber leading inside wall.
The filter membrane is ultrasonically welded within the rear end end of valve core case, the edge of filter membrane and connecting corner right angle
It is in contact on the inside of side.
The madial wall of the lower needle stand chamber is provided with multiple annular projections.
The check valve also includes check valve ring surface, the inner circle phase vertical with check valve cylinder lateral wall of check valve ring surface
Even, the cylindrical of check valve ring surface is connected with check valve frustum lower end.
The check valve frustum rear end is provided with the cylindrical side wall being engaged with inner cylindrical sidewall.
The utility model has the advantages and positive effects of：The filtering and injection process for filtering injection needle are entered automatically
OK, syringe need not change syringe needle, it is to avoid the possibility of bacterium and virus pollution.The utility model filtering injection needle tool
There is overall structure simple, easy to operate, safe and reliable, cost is low, disposable, it is excellent to be prevented effectively from cross-infection generation etc.
Point.
Brief description of the drawings
Fig. 1 is the explosive view that the utility model filters injection needle
Fig. 2 is needle stand side view on the utility model
Fig. 3 is needle stand top view on the utility model
Fig. 4 is needle stand dimensional structure diagram on the utility model
Fig. 5 is needle stand side view under the utility model
Fig. 6 is needle stand top view under the utility model
Fig. 7 is the utility model one-way valve structures schematic diagram
Fig. 8 is the utility model feed liquor status architecture schematic diagram
Fig. 9 is that the utility model goes out liquid status structural representation
In figure：
1st, draw point 2, upper needle stand 3, sealing gasket 4, check valve 5, filter membrane
6th, lower needle stand 21, set square 22, groove 23, draw point mounting hole 24, unidirectional valve pocket
25th, lower needle stand chamber 41, check valve cylinder 42, check valve frustum 43, check valve ring surface 61, connecting portion
62nd, valve element 63, valve core case 64, connecting corner 65, conehead chamber 66, fluid hole
241st, truncated cone-shaped madial wall 242, inner cylindrical sidewall
Embodiment
As shown in Fig. 1, Fig. 8, Fig. 9, injection needle, including draw point 1, upper needle stand 2, lower needle stand 6, check valve 4, sealing are filtered
Pad 3 and filter membrane 5, draw point 1 are arranged on the front end of upper needle stand 2, and the rear end of lower needle stand 6 is connected on the conehead of syringe.As schemed
2nd, shown in Fig. 3, Fig. 4, lower needle stand chamber 25 and unidirectional valve pocket 24 are provided with the upper rear end of needle stand 2, unidirectional valve pocket 24 is included in truncated cone-shaped
Side wall 241 and inner cylindrical sidewall 242, the small end end face of truncated cone-shaped madial wall 241 are provided with annular groove, the center of annular groove
It is connected with draw point mounting hole 23, the big end of truncated cone-shaped madial wall 241 is connected with inner cylindrical sidewall 242, on the inside of truncated cone-shaped
Wall 242 is provided with groove 22, and one end of groove 22 is connected with annular groove, and annular groove bottom is vertically provided with isosceles triangle
Set square 21, the two ends on the base of set square 21 are connected with annular groove bottom respectively, as shown in Figure 5, Figure 6, after lower needle stand 6
End is provided with conehead chamber 65, and the front end of lower needle stand 6 is provided with columnar connecting portion 61, and the center of connecting portion 61 is provided with columnar valve
Core 62, the center of valve element 62 is fluid hole 66, and the rear end of valve element 62 is connected with the front end of conehead chamber 65, as shown in fig. 7, check valve
4 include check valve cylinder 41 and check valve frustum 42, and the small end of check valve frustum 42 is connected with the front end of check valve cylinder 41.
Filter membrane 5 is circle, and filter membrane 5 is arranged on the rear end end of valve element 62, that is, the diameter of filter membrane 5 is more than the interior of valve element 62
Footpath, filter membrane 5 is pasted onto on the rear end end wall of valve element 62, and the diameter of filter membrane 5 preferably is equal to the external diameter of valve element 62, such valve
Core rear end 62 and the connection area of filter membrane 5 are maximum, are connected firmly.Check valve cylinder 41 is set on valve element 62, unidirectional valve cone
The side surface of platform 42 is engaged with the unidirectional truncated cone-shaped madial wall 241 of valve pocket 24, and sealing gasket 3 is arranged on the end check valve of valve element 62
The front end of cylinder 41, the drift angle of set square 21 is in contact with the preceding surface of sealing gasket 3, surface and check valve cylinder 41 after sealing gasket 3
Front end surface be in contact, the lower inside of needle stand chamber 25 of the insertion of connecting portion 61 and be interference fitted between lower needle stand chamber 25.
As shown in Figure 3, Figure 4, on truncated cone-shaped madial wall 241 can circumference uniform distribution be provided with multiple grooves 22.It is preferred that, in round platform
Circumference uniform distribution is provided with 4 grooves 22 on shape madial wall 241, and set square 21 is parallel with two relative grooves 22, set square 21
The base length of side be equal to annular groove external diameter.Namely set square 21 is arranged on the centre of two relative grooves 22, groove
The 22 symmetrical both sides for being arranged on set square 21, being connected firmly between such set square 21 and annular groove bottom, set square
21 are difficult to tilt, and pressure and flow velocity are more stable during decoction outflow.It is preferred that, the width of groove 22 is more than the thickness of set square 21
Degree.So decoction can be flowed into draw point mounting hole 23 by the groove 22 of the both sides of set square 21.Inner cylindrical sidewall 242
Internal diameter is less than the internal diameter of lower needle stand chamber 25.
The rear end side wall of valve element 62 directly can be connected with the madial wall of conehead chamber 65, and provided with can be by between decoction
Gap.As shown in Figure 5, Figure 6, the rear end of valve element 62 can also be provided with columnar valve core case 63, and the external diameter of valve core case 63 is more than valve
The external diameter of core 62, the internal diameter of valve core case 63 is equal to the internal diameter of valve element 62, and the rear end of valve core case 63 is connected with the front end of conehead chamber 65.
The setting of valve core case 63 makes to be connected firmly between valve element 62 and the leading inside wall of conehead chamber 65, it is to avoid injection pressure is excessive and causes
Valve element 62 is damaged.The back end circumference of valve core case 62 is laid with multiple connecting corners 64, a right-angle side of connecting corner 64
End is connected with the rear end of valve core case 62, end and the leading inside wall phase of conehead chamber 65 of another right-angle side of connecting corner 64
Connection.Decoction can be flowed through by the gap between connecting corner 64.Filter membrane 5 can fix viscous by way of ultra-sonic welded
The rear end end of valve core case 63 is attached to, the edge of filter membrane 5 on the inside of a right-angle side of connecting corner 64 with being in contact.Connection is turned
Angle 62 firmly connects valve core case 63 and the madial wall of conehead chamber 65, it is to avoid injection pressure is excessive and causes the damage of valve element 62
It is bad.
Multiple annular projections are provided with the madial wall of lower needle stand chamber 25.Annular protrusion can improve the lower inner side of needle stand chamber 25
The bonding strength and sealing effectiveness connected between wall and the lateral wall of connecting portion 61.
As shown in fig. 7, check valve 4 can also include check valve ring surface 43, the inner circle of check valve ring surface 43 with it is unidirectional
The side wall of valve cylinder body 41 is vertically connected, and the cylindrical of check valve ring surface 43 is connected with the lower end of check valve frustum 42.It can so improve
Sealing effectiveness between the side wall of check valve frustum 42 and truncated cone-shaped madial wall 241.Further, the rear end of check valve frustum 42 can be set
There is the cylindrical side wall being engaged with inner cylindrical sidewall 241.
The course of work of this example：
When sucking decoction, as shown in figure 8, decoction enters the draw point mounting hole 23 of the upper front end of needle stand 2 by draw point 1
In, unidirectional valve pocket 24, in the presence of suction, check valve frustum 42 are entered by the groove 22 on truncated cone-shaped madial wall 241
Deformation is produced, the gap between check valve frustum 42 and truncated cone-shaped madial wall 241 is opened, decoction passes through inner cylindrical sidewall 242
Gap between check valve frustum 42 greatly end enters the rear end of unidirectional valve pocket 24, is then turned in the presence of suction from connection
Gap between angle 64 is entered in the lower conehead chamber 65 of needle stand 6.
In liquid medicine injection, as shown in figure 9, in the presence of thrust, check valve frustum 42 produces deformation, check valve frustum
Clearance seal between 42 side surfaces and truncated cone-shaped madial wall 241, connecting portion is returned to by the gap between connecting corner 64
Decoction between 61 and valve element 62 cannot pass through the feed pathway between the side surface of check valve frustum 42 and truncated cone-shaped madial wall 241
Outflow, but by the filter membrane 5 of the rear end end of valve element 62, flowed out from the fluid hole at the center of valve element 62, by sealing gasket 3,
Gap in the presence of pressure between sealing gasket 3 and the front end of valve element 62 is opened, and decoction is entered in unidirectional valve pocket 24, then passed through
Unidirectional valve pocket 24 is entered in draw point 1.
One embodiment of the present utility model is described in detail above, but the content is only of the present utility model
Preferred embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.It is all to be made according to present utility model application scope
Equivalent change with improve etc., all should still belong within patent covering scope of the present utility model.
Claims (10)
1. injection needle is filtered, including draw point, upper needle stand, lower needle stand, check valve, sealing gasket and filter membrane, draw point is arranged on upper
The front end of needle stand, the rear end of lower needle stand is connected on the conehead of syringe, it is characterised in that：The upper needle stand rear end is provided with lower pin
Seat chamber and unidirectional valve pocket, unidirectional valve pocket include truncated cone-shaped madial wall and inner cylindrical sidewall, the small end end face of truncated cone-shaped madial wall
Provided with annular groove, center and the draw point mounting hole of annular groove are connected, big end and the cylinder inner side of truncated cone-shaped madial wall
Wall is connected, and truncated cone-shaped madial wall is provided with groove, and one end of groove is connected with annular groove, and annular groove bottom is vertically provided with
The set square of isosceles triangle, the two ends on set square base are connected with annular groove bottom respectively, the rear end of the lower needle stand
Provided with conehead chamber, the front end of lower needle stand is provided with columnar connecting portion, and the center of connecting portion is provided with columnar valve element, valve element
Rear end is connected with the front end of conehead chamber, and the check valve includes check valve cylinder and check valve frustum, the small end of check valve frustum
It is connected with the front end of check valve cylinder, the filter membrane is circle, filter membrane is arranged at the rear end end of valve element, unidirectional valve cylinder
Body is set on valve element, and the side surface of check valve frustum is engaged with unidirectional valve pocket truncated cone-shaped madial wall, and the sealing gasket is set
In the front end of the end check valve cylinder of valve element, the drift angle of the set square is in contact with the preceding surface of sealing gasket, table after sealing gasket
Face is in contact with the front end surface of check valve cylinder, the lower needle stand intracavitary portion of connecting portion insertion and the interference between lower needle stand chamber
Coordinate.
2. filtering injection needle according to claim 1, it is characterised in that：Circumference uniform distribution is provided with more on truncated cone-shaped madial wall
Individual groove.
3. filtering injection needle according to claim 2, it is characterised in that：Circumference uniform distribution is provided with 4 on truncated cone-shaped madial wall
Individual groove, the set square is parallel with two relative grooves, and the base length of side of the set square is equal to the outer of annular groove
Footpath.
4. filtering injection needle according to claim 3, it is characterised in that：The width of the groove is more than the thickness of set square
Degree.
5. the filtering injection needle according to claim 1-4 any one, it is characterised in that：The inner cylindrical sidewall
Internal diameter is less than the internal diameter of lower needle stand chamber.
6. filtering injection needle according to claim 5, it is characterised in that：The rear end of the valve element is provided with columnar valve
Core print seat, the external diameter of valve core case is more than the external diameter of valve element, and the internal diameter of valve core case is equal to the internal diameter of valve element, the rear end of valve core case and conehead
The front end of chamber is connected, and the filter membrane is arranged on the rear end end of valve core case.
7. filtering injection needle according to claim 6, it is characterised in that：The back end circumference of the valve core case is laid with
Multiple connecting corners, the end of a right-angle side of connecting corner is connected with valve element base rear end, and another of connecting corner is straight
The end of the arm of angle is connected with conehead chamber leading inside wall.
8. filtering injection needle according to claim 7, it is characterised in that：The filter membrane is ultrasonically welded within valve core case
Rear end end, the edge of filter membrane on the inside of connecting corner right-angle side with being in contact.
9. filtering injection needle according to claim 8, it is characterised in that：The check valve also includes check valve annular
Face, inner circle and the check valve cylinder lateral wall of check valve ring surface are vertically connected, the cylindrical and check valve frustum of check valve ring surface
Lower end is connected.
10. filtering injection needle according to claim 9, it is characterised in that：The check valve frustum rear end is provided with and circle
The cylindrical side wall that cylindricality madial wall is engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124618.XU CN206372356U (en) | 2016-10-14 | 2016-10-14 | Filter injection needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124618.XU CN206372356U (en) | 2016-10-14 | 2016-10-14 | Filter injection needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206372356U true CN206372356U (en) | 2017-08-04 |
Family
ID=59401564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621124618.XU Active CN206372356U (en) | 2016-10-14 | 2016-10-14 | Filter injection needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206372356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390240A (en) * | 2016-10-14 | 2017-02-15 | 山东威高集团医用高分子制品股份有限公司 | Filtering injection needle |
-
2016
- 2016-10-14 CN CN201621124618.XU patent/CN206372356U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390240A (en) * | 2016-10-14 | 2017-02-15 | 山东威高集团医用高分子制品股份有限公司 | Filtering injection needle |
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| GR01 | Patent grant |