CN207898741U - Bi-directional filtered injection needle - Google Patents
Bi-directional filtered injection needle Download PDFInfo
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- CN207898741U CN207898741U CN201720644655.1U CN201720644655U CN207898741U CN 207898741 U CN207898741 U CN 207898741U CN 201720644655 U CN201720644655 U CN 201720644655U CN 207898741 U CN207898741 U CN 207898741U
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- spool
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- output channel
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Abstract
The utility model belongs to the field of medical instrument technology, more particularly to bi-directional filtered injection needle, including needle stand, the draw point of needle stand front end, needle stand rear end is equipped with the bellmouth being connect with syringe, suction passage is equipped in the needle stand, output channel, suction passage, output channel front end is connected to draw point, suction passage, output channel rear end is connected to bellmouth, suction passage is equipped with suction filter chamber, the rear and front end of suction filter chamber is equipped with the unidirectional valve member of sucking of one-way conduction from the front to the back, suction filter intracavitary is equipped with suction filter part, output channel is equipped with output filtering chamber, the rear and front end of output filtering chamber is equipped with the output one-way valve part of one-way conduction from the front to the back, output filtering intracavitary is equipped with output filtering part, filter out the impurity in liquid, improve the safety that syringe uses.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and in particular to bi-directional filtered injection needle.
Background technology
The injection of Clinical practice is encapsulated in vial more at present, is pricked rubber stopper with the syringe needle of syringe or is cut with grinding wheel
When vial extracts liquid, bottle stopper material bits or glass powder can enter in injection, meeting when extracting liquid medicine using syringe
These impurity are extracted into syringe and direct injection enters human body, prodigious injury risk can be caused.
Utility model content
Technical problem to be solved in the utility model is in view of the foregoing drawbacks, to provide bi-directional filtered injection needle, filtering
Fall the impurity in liquid, improves the safety that syringe uses.
The technical solution that the utility model solves the use of its technical problem is as follows：
Bi-directional filtered injection needle, includes the draw point of needle stand, needle stand front end, and needle stand rear end is equipped with the cone being connect with syringe
Shape hole, the needle stand is interior to be equipped with suction passage, output channel, and suction passage, output channel front end are connected to draw point, and sucking is logical
Road, output channel rear end are connected to bellmouth, and suction passage is equipped with suction filter chamber, and the rear and front end of suction filter chamber is equipped with
The unidirectional valve member of the sucking of one-way conduction from the front to the back, suction filter intracavitary are equipped with suction filter part, and output channel is equipped with output
Filter chamber, the rear and front end of output filtering chamber are equipped with the output one-way valve part of one-way conduction from the front to the back, and output filtering intracavitary is set
There is output filtering part.
Suction passage is that syringe liquid sucks designated lane, and output channel is that syringe liquid exports designated lane, medicine
Output, the sucking of liquid individually carry out, and the suction filter chamber in suction passage worries the impurity in suction process in filter chamber
It is interior, avoid impurity from entering syringe by suction passage, the unidirectional valve member of filter chamber both sides is liquid sucking, exports accordingly solely
The dual fail-safe in vertical channel improves safety, and in liquid output, output filtering chamber can will be mixed into the impurity mistake of liquid in syringe
It filters out, avoids enter into human body, greatly improve the safety that syringe uses.
Further, the needle stand front end is internally provided with the injection road being connected to draw point, after injecting road front end and draw point
End connection conducting, injection road rear end are equipped with Y type liquid separations road, and liquid separation road front end is connected with injection road rear end, liquid separation road rear end difference
Conducting corresponding with suction passage, output channel, liquid separation road convenient for liquid the independent colleague of sucking, output.
Further, the bellmouth front end is equipped with the drain road of Y types, and drain road rear end is connected with bellmouth, drain
Road front end corresponds respectively to absorbing path, output channel corresponds to conducting.
Further, the injection road is equipped with sealing ring with draw point joint, ensures the sealing of junction, improves and uses
Safety.
Further, the suction filter part is suction filter film, and the setting of suction filter film is kept away in suction filter intracavitary
By rear side, the output filtering part is output filtering film, and the setting of output filtering film leans on front side in output filtering chamber, filter membrane
Aperture is 10~15um, can go out the contaminant filter in medicine company, keep liquid pure.
Further, the unidirectional valve member of the sucking, output one-way valve part are check valve, and check valve includes valve chamber, valve
Spool, the spring of intracavitary, valve chamber is concentric with suction passage or output channel and communicates, the internal diameter of valve chamber be more than suction passage or
Output channel internal diameter, spool outer diameter is consistent with valve chamber internal diameter, and taper or the protrusion of arc, protrusion are equipped at spool front end face axle center
Preceding convex direction is consistent with check valve one-way conduction direction, and projection portion extends to inside suction passage or output channel, and spring is set
Set in the valve chamber on rear side of spool, spool is equipped with the through-hole that flows through for liquid, is moved after spool, protrusion extend to suction passage or
Part inside output channel is exited, and liquid can circulate in suction passage or output channel, realizes one-way conduction effect.
Further, the through-hole is uniformly arranged along spool axle center, and wall surface of the hole of the through-hole close to spool axle center side arrives
Spool axle center distance is more than raised maximum radius.
Further, the through-hole is by recess of the spool periphery towards valve core inside, and be recessed bottom surface to spool axle center
Distance is more than raised maximum radius.
Further, the wall surface of suction passage or output channel and valve chamber joint is the conical surface or cambered surface identical with protrusion
Sealing effect can be improved in structure, the conical surface or globoidal structure.
Further, the needle stand includes front needle seat, rear needle stand, and front needle seat front end is connect with draw point, bellmouth setting
At rear needle stand rear portion, front needle seat rear end is Nian Jie with rear needle stand front end, production, assembly convenient for needle stand.
The utility model has the beneficial effects that：Using the above scheme, syringe needle passes through its inside to sucking, the output of liquid
Intake line, output channel individually circulate, and are independent of each other, and suck, are filtered to liquid during output, and retention is miscellaneous
Matter is that liquid enters pure, the safety that greatly raising syringe uses of human body more.
Description of the drawings
Through the following detailed description taken in conjunction with the accompanying drawings, the utility model objects, features and advantages above-mentioned and other will
It becomes apparent.
Fig. 1 is the vertical section structure schematic diagram of the utility model embodiment 1.
Fig. 2 is the vertical section structure schematic diagram that check valve is sucked in the utility model embodiment 1.
Fig. 3 is the front view of spool in the utility model embodiment 1.
Fig. 4 is the vertical section structure schematic diagram of the utility model embodiment 3.
Fig. 5 is the vertical section structure schematic diagram of output one-way valve in the utility model embodiment 3.
Fig. 6 is the front view of spool in the utility model embodiment 3.
Fig. 7 is the decomposition texture schematic diagram of the utility model needle stand.
Fig. 8 is the front view of needle stand after the utility model.
Fig. 9 is the rearview of the utility model front needle seat.
Wherein：1 is needle stand, and 11 be suction passage, and 12 be output channel, and 13 be injection road, and 131 be liquid separation road, and 14 be to lead
Fluid passage, 15 be front needle seat, and 151 be locating slot, and 16 be rear needle stand, and 161 be positioning protrusion, and 4 be sealing ring, and 5 be suction filter chamber,
51 be sucking check valve, and 52 be suction filter film, and 53 be output filtering chamber, and 54 be output one-way valve, and 55 be output filtering film, 6
It is spool for valve chamber, 61,611 be protrusion, and 612 be through-hole, and 62 be spring.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1：- Fig. 3 referring to Fig.1, bi-directional filtered injection needle include the draw point 2 of needle stand 1,1 front end of needle stand, needle stand
1 rear end is equipped with the bellmouth 3 being connect with syringe, and 2 side of draw point is front side, and 3 side of bellmouth is rear side, the inside of needle stand 1
Middle part is equipped with suction passage 11, output channel 12, and suction passage 11, output channel 12 are symmetrical arranged about 1 axle center of needle stand, needle stand
The injection road 13 being connected to draw point 2 is equipped at 1 front end axle center, injection 13 front end of road connect conducting, joint with 2 rear end of draw point
If Packed sealing ring 4, injection 13 rear end of road is equipped with the liquid separation road 131 of Y types, 131 front end of liquid separation road and injection 13 rear end of road
Conducting, two bifurcateds of 131 rear end of liquid separation road respectively with suction passage 11, output channel 12 is correspondings is connected, it is suction passage 11, defeated
The rear end for going out channel 12 is directly connected to bellmouth 3, and suction passage 11 is equipped with suction filter chamber 5, before suction filter chamber 5
Both ends are equipped with the sucking check valve 51 of one-way conduction from the front to the back afterwards, and suction filter chamber 5 is internally provided with suction filter film 52, inhales
Enter the side rearward that filter membrane 52 is arranged in suction filter chamber 5, the conducting direction of sucking check valve 51 is led for unilateral side backward
Logical, liquid can only be circulated from suction passage 11 into syringe by sucking check valve 51, and output channel 12 is equipped with and exported
Filter chamber 53, the rear and front end of output filtering chamber 53 are equipped with the output one-way valve 54 of one-way conduction from the front to the back, output filtering chamber 54
Interior to be equipped with output filtering film 55, liquid is only capable of circulating to draw point through output channel 12 by output one-way valve 54, output filtering film
Front side is leaned in 55 settings in output filtering chamber 53, and it is the medical of 10um that output filtering film 55, suction filter film 52, which select aperture,
Contaminant filter in medicine company can be gone out, keep liquid pure by disposable filtering film.
It is identical to suck check valve 51, the composition structure of output one-way valve 54, differs only in conducting direction difference, sucking is single
Include valve chamber 6, the spool 61 in valve chamber 6, spring 62, valve chamber 6 and suction passage 11 or output to valve 51, output one-way valve 54
Channel 12 is concentric and communicates, and the internal diameter of valve chamber 6 is more than 12 internal diameter of suction passage 11 or output channel, 61 outer diameter of spool and valve chamber
6 internal diameter is consistent, and rear and front end and the suction passage 11 or 12 joint of output channel of valve chamber 6 form step surface structure, spool
Outside tapered protrusion 611 is equipped at 61 front end face axle center, raised 611 outer convex directions are consistent with check valve one-way conduction direction,
That is the protrusion 611 of the spool 61 of sucking check valve 51 is towards on rear side of needle stand 1,611 direction of protrusion of 54 spool 61 of output one-way valve
On front side of needle stand 1, the inside of suction passage 11 or output channel 12, the conical surface of protrusion 611 and suction are extended partially into before protrusion 611
Enter the port wall of channel 11 or output channel 12 at this to connect, spool 61 is made to carry out suction passage 11 or output channel 12
Plugging action, spring 62 are arranged in the valve chamber 6 of 1 rear side of spool, and 62 one end of spring connects with 61 end face of spool, the other end and valve
The step surface of chamber 6 connects, and spool 61 is equipped with the through-hole 612 flowed through for liquid, and through-hole 612 is uniformly arranged along 61 axle center of spool,
Wall surface of the hole of the through-hole 612 close to 61 axle center side of spool is more than raised 611 maximum radiuses to 61 axle center of spool distance.
Moved when syringe sucks liquid, after syringe piston, generate negative pressure, negative pressure make the spool 61 of sucking check valve 51 to
The elastic force of spring 62 is overcome to move afterwards, and being then closed for output one-way valve 54 is closer, under normal circumstances, spring 62 is in pressure
Contracting state ensures the supportive to spool 61, realizes that output channel 12, suction passage 11 are closed, sucks the valve of check valve 51
It is moved after core 61, the preceding part that protrusion 611 extends to inside suction passage 11 is exited, and seam is generated between protrusion 611 and suction passage 11
Gap, liquid enter suction passage 11 by reservoir bottle, enter in syringe through suction passage 11, are generated in being moved after syringe piston
Negative pressure makes two sucking check valves 51 open successively, is first opened close to the sucking check valve 51 of 2 side of draw point, and then another is again
It opens, liquid circulates in suction passage 11, and when by suction filter chamber 5, impurity is inhaled into filter membrane 52 and filters out, and is deposited in suction
Enter in filter chamber 5,52 postposition of suction filter film may filter that out a large amount of impurity, the impurity in reservoir bottle is avoided to enter injection
In device, during liquid is released by syringe, under the action of positive pressure, the closer of the closure of check valve 51 is sucked, output is unidirectional
The spool 61 of valve 54 moves forward, and spool 61 is opened, and liquid flows into output channel 12, and flows to draw point through output channel 12, and two defeated
Go out check valve 54 to open successively, the output one-way valve 54 close to syringe is first opened, in liquid medicine flow, in output filtering chamber 53
Output filtering film 55 by the contaminant filter carried secretly in liquid in output filtering chamber 53, keep the liquid for flowing to draw point 2 pure, inhale
Enter channel 11 be syringe liquid suck designated lane, output channel 12 be syringe liquid export designated lane, liquid it is defeated
Go out, suck independent pipeline circulation, and suck, be filtered impurity during output, impurity retention makes the medicine of sucking, output
Liquid is pure, avoids enter into human body, greatly improves the safety that syringe uses.
Embodiment 2：- Fig. 3 referring to Fig.1, bi-directional filtered injection needle include the draw point 2 of needle stand 1,1 front end of needle stand, needle stand
1 rear end is equipped with the bellmouth 3 being connect with syringe, and 2 side of draw point is front side, and 3 side of bellmouth is rear side, the inside of needle stand 1
Middle part is equipped with suction passage 11, output channel 12, and suction passage 11, output channel 12 are symmetrical arranged about 1 axle center of needle stand, needle stand
The injection road 13 being connected to draw point 2 is equipped at 1 front end axle center, injection 13 front end of road connect conducting, joint with 2 rear end of draw point
If Packed sealing ring 4, injection 13 rear end of road is equipped with the liquid separation road 131 of Y types, 131 front end of liquid separation road and injection 13 rear end of road
Conducting, two bifurcateds of 131 rear end of liquid separation road respectively with suction passage 11, output channel 12 is correspondings is connected, it is suction passage 11, defeated
The rear end for going out channel 12 is directly connected to bellmouth 3, and suction passage 11 is equipped with suction filter chamber 5, before suction filter chamber 5
Both ends are equipped with the sucking check valve 51 of one-way conduction from the front to the back afterwards, and suction filter chamber 5 is internally provided with suction filter film 52, inhales
Enter the side rearward that filter membrane 52 is arranged in suction filter chamber 5, the conducting direction of sucking check valve 51 is led for unilateral side backward
Logical, liquid can only be circulated from suction passage 11 into syringe by sucking check valve 51, and output channel 12 is equipped with and exported
Filter chamber 53, the rear and front end of output filtering chamber 53 are equipped with the output one-way valve 54 of one-way conduction from the front to the back, output filtering chamber 54
Interior to be equipped with output filtering film 55, liquid is only capable of circulating to draw point through output channel 12 by output one-way valve 54, output filtering film
Front side is leaned in 55 settings in output filtering chamber 53, and it is the medical of 10um that output filtering film 55, suction filter film 52, which select aperture,
Contaminant filter in medicine company can be gone out, keep liquid pure by disposable filtering film.
It is identical to suck check valve 51, the composition structure of output one-way valve 54, differs only in conducting direction difference, sucking is single
Include valve chamber 6, the spool 61 in valve chamber 6, spring 62, valve chamber 6 and suction passage 11 or output to valve 51, output one-way valve 54
Channel 12 is concentric and communicates, and the internal diameter of valve chamber 6 is more than 12 internal diameter of suction passage 11 or output channel, 61 outer diameter of spool and valve chamber
6 internal diameter is consistent, and rear and front end and the suction passage 11 or 12 joint of output channel of valve chamber 6 form step surface structure, spool
Outside tapered protrusion 611 is equipped at 61 front end face axle center, raised 611 outer convex directions are consistent with check valve one-way conduction direction,
That is the protrusion 611 of the spool 61 of sucking check valve 51 is towards on rear side of needle stand 1,611 direction of protrusion of 54 spool 61 of output one-way valve
On front side of needle stand 1, the inside of suction passage 11 or output channel 12, suction passage 11 or output are extended partially into before protrusion 611
It is cone structure at channel 12 and raised 611 cooperations, the conical surface of the two coincide, and sealing effect can be improved in cone match, improves envelope
Stifled effect, spring 62 are arranged in the valve chamber 6 of 1 rear side of spool, and 62 one end of spring connects with 61 end face of spool, the other end and valve
The step surface of chamber 6 connects, and spool 61 is equipped with the through-hole 612 flowed through for liquid, and through-hole 612 is uniformly arranged along 61 axle center of spool,
Wall surface of the hole of the through-hole 612 close to 61 axle center side of spool is more than raised 611 maximum radiuses to 61 axle center of spool distance.
Moved when syringe sucks liquid, after syringe piston, generate negative pressure, negative pressure make the spool 61 of sucking check valve 51 to
The elastic force of spring 62 is overcome to move afterwards, and being then closed for output one-way valve 54 is closer, under normal circumstances, spring 62 is in pressure
Contracting state ensures the supportive to spool 61, realizes that output channel 12, suction passage 11 are closed, sucks the valve of check valve 51
It is moved after core 61, the preceding part that protrusion 611 extends to inside suction passage 11 is exited, and seam is generated between protrusion 611 and suction passage 11
Gap, liquid enter suction passage 11 by reservoir bottle, enter in syringe through suction passage 11, are generated in being moved after syringe piston
Negative pressure makes two sucking check valves 51 open successively, is first opened close to the sucking check valve 51 of 2 side of draw point, and then another is again
It opens, liquid circulates in suction passage 11, and when by suction filter chamber 5, impurity is inhaled into filter membrane 52 and filters out, and is deposited in suction
Enter in filter chamber 5,52 postposition of suction filter film may filter that out a large amount of impurity, the impurity in reservoir bottle is avoided to enter injection
In device, during liquid is released by syringe, under the action of positive pressure, the closer of the closure of check valve 51 is sucked, output is unidirectional
The spool 61 of valve 54 moves forward, and spool 61 is opened, and liquid flows into output channel 12, and flows to draw point through output channel 12, and two defeated
Go out check valve 54 to open successively, the output one-way valve 54 close to syringe is first opened, in liquid medicine flow, in output filtering chamber 53
Output filtering film 55 by the contaminant filter carried secretly in liquid in output filtering chamber 53, keep the liquid for flowing to draw point 2 pure, inhale
Enter channel 11 be syringe liquid suck designated lane, output channel 12 be syringe liquid export designated lane, liquid it is defeated
Go out, suck independent pipeline circulation, and suck, be filtered impurity during output, impurity retention makes the medicine of sucking, output
Liquid is pure, avoids enter into human body, greatly improves the safety that syringe uses.
Embodiment 3：With reference to Fig. 4-Fig. 5, bi-directional filtered injection needle includes the draw point 2 of needle stand 1,1 front end of needle stand, needle stand 1
Rear end is equipped with the bellmouth 3 that connect with syringe, and 2 side of draw point is front side, and 3 side of bellmouth is rear side, in the inside of needle stand 1
Portion is equipped with suction passage 11, output channel 12, and suction passage 11, output channel 12 are symmetrical arranged about 1 axle center of needle stand, needle stand 1
Front end axle center at be equipped with the injection road 13 that be connected to draw point 2, inject 13 front end of road and connect conducting, joint with 2 rear end of draw point
If Packed sealing ring 4, injection 13 rear end of road is equipped with the liquid separation road 131 of Y types, 131 front end of liquid separation road and injection 13 rear end of road
Conducting, two bifurcateds of 131 rear end of liquid separation road respectively with suction passage 11, output channel 12 is correspondings is connected, 3 front end of bellmouth is set
There are the drain road 14 of Y types, 14 rear end of drain road to be communicated with bellmouth 3, the front end of 14 bifurcated of drain road corresponds respectively to sucking and leads to
Road 11, output channel 12 rear end correspond to connection, suction passage 11 be equipped with suction filter chamber 5, front and back the two of suction filter chamber 5
End is equipped with the sucking check valve 51 of one-way conduction from the front to the back, and suction filter chamber 5 is internally provided with suction filter film 52, sucked
The side rearward in suction filter chamber 5 is arranged in filter membrane 52, and the conducting direction of sucking check valve 51 is unilateral conducting backward, medicine
Liquid can only be circulated from suction passage 11 into syringe by sucking check valve 51, and output channel 12 is equipped with output filtering chamber
53, the rear and front end of output filtering chamber 53 is equipped with the output one-way valve 54 of one-way conduction from the front to the back, is set in output filtering chamber 54
There are output filtering film 55, liquid to be only capable of circulating to draw point through output channel 12 by output one-way valve 54, output filtering film 55 is set
It sets and leans on front side in output filtering chamber 53, it is the medical primary of 10um that output filtering film 55, suction filter film 52, which select aperture,
Property filter membrane, the contaminant filter in medicine company can be gone out, keep liquid pure.
It is identical to suck check valve 51, the composition structure of output one-way valve 54, differs only in conducting direction difference, sucking is single
Include valve chamber 6, the spool 61 in valve chamber 6, spring 62, valve chamber 6 and suction passage 11 or output to valve 51, output one-way valve 54
Channel 12 is concentric and communicates, and the internal diameter of valve chamber 6 is more than 12 internal diameter of suction passage 11 or output channel, 61 outer diameter of spool and valve chamber
6 internal diameter is consistent, and rear and front end and the suction passage 11 or 12 joint of output channel of valve chamber 6 form step surface structure, spool
Outside ball bumps 611 are equipped at 61 front end face axle center, raised 611 outer convex directions are consistent with check valve one-way conduction direction,
That is the protrusion 611 of the spool 61 of sucking check valve 51 is towards on rear side of needle stand 1,611 direction of protrusion of 54 spool 61 of output one-way valve
On front side of needle stand 1, the inside of suction passage 11 or output channel 12, the spherical surface of protrusion 611 and suction are extended partially into before protrusion 611
Entering the end face contact of channel 11 or output channel 12 at this to be blocked, spring 62 is arranged in the valve chamber 6 of 1 rear side of spool,
62 one end of spring connects with 61 end face of spool, the other end connects with the step surface of valve chamber 6, and spool 61 is equipped with to be flowed through for liquid
Through-hole 612, through-hole 612 is, towards the recess inside spool 61, recess bottom surface is big to 61 axle center of spool distance by 61 periphery of spool
In raised 611 maximum radiuses, through-hole 612 is uniformly arranged along 61 axle center of spool, hole of the through-hole 612 close to 61 axle center side of spool
Wall surface is more than raised 611 maximum radiuses to 61 axle center of spool distance.
Moved when syringe sucks liquid, after syringe piston, generate negative pressure, negative pressure make the spool 61 of sucking check valve 51 to
The elastic force of spring 62 is overcome to move afterwards, and being then closed for output one-way valve 54 is closer, under normal circumstances, spring 62 is in pressure
Contracting state ensures the supportive to spool 61, realizes that output channel 12, suction passage 11 are closed, sucks the valve of check valve 51
It is moved after core 61, the preceding part that protrusion 611 extends to inside suction passage 11 is exited, and seam is generated between protrusion 611 and suction passage 11
Gap, liquid enter suction passage 11 by reservoir bottle, enter in syringe through suction passage 11, are generated in being moved after syringe piston
Negative pressure makes two sucking check valves 51 open successively, is first opened close to the sucking check valve 51 of 2 side of draw point, and then another is again
It opens, liquid circulates in suction passage 11, and when by suction filter chamber 5, impurity is inhaled into filter membrane 52 and filters out, and is deposited in suction
Enter in filter chamber 5,52 postposition of suction filter film may filter that out a large amount of impurity, the impurity in reservoir bottle is avoided to enter injection
In device, during liquid is released by syringe, under the action of positive pressure, the closer of the closure of check valve 51 is sucked, output is unidirectional
The spool 61 of valve 54 moves forward, and spool 61 is opened, and liquid flows into output channel 12, and flows to draw point through output channel 12, and two defeated
Go out check valve 54 to open successively, the output one-way valve 54 close to syringe is first opened, in liquid medicine flow, in output filtering chamber 53
Output filtering film 55 by the contaminant filter carried secretly in liquid in output filtering chamber 53, keep the liquid for flowing to draw point 2 pure, inhale
Enter channel 11 be syringe liquid suck designated lane, output channel 12 be syringe liquid export designated lane, liquid it is defeated
Go out, suck independent pipeline circulation, and suck, be filtered impurity during output, impurity retention makes the medicine of sucking, output
Liquid is pure, avoids enter into human body, greatly improves the safety that syringe uses.
With reference to Fig. 7-Fig. 9, production, assembly for the ease of needle stand 1, needle stand 1 includes front needle seat 15, rear needle stand 16, preceding needle
15 front ends of seat are connect with draw point 2, and bellmouth 3 is arranged at 16 rear portion of rear needle stand, and 15 rear end of front needle seat is Nian Jie with 16 front end of rear needle stand,
Suction passage 11, output channel 12 are divided for two parts, after front needle seat 15,16 split of rear needle stand, suction passage 11, output channel 12
It respectively is formed through entirety, for the ease of producing, after suction filter cavity rear end face, the rear end face of output filtering chamber and front needle seat 15
End face is in same plane, and 16 front end of rear needle stand is concave inward structure, and 15 rear end of front needle seat is embedded in concave inward structure, rear needle stand 16
The side wall of concave inward structure is equipped with positioning protrusion 161, and positioning protrusion 161 is uniformly distributed circumferentially, and 15 rear end week of front needle seat faces
The locating slot 151 for being equipped at positioning protrusion 161 and coincideing with convex 161 is answered, positioning protrusion 161, locating slot 151, which coincide, to be assembled
Merging precision between the two is improved when needle stand, after front needle seat 15, rear needle stand 16 splice, suction filter cavity rear end and suction passage 11
It is penetrated through in the port of 16 front end face corresponding position of rear needle stand, output filtering cavity rear end is with output channel 12 in 16 front end face of rear needle stand
On port perforation, front needle seat 15,16 abutted surface of rear needle stand can be arranged sealing element and be sealed, suction passage 11, output channel
12 structure on front needle seat 15, rear needle stand 16 be not limited to the present embodiment in record, can convert, as long as ensuring front needle seat
15, after 16 split of rear needle stand, suction passage 11, output channel 12 respectively penetrate through.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
It makes, to any simple modification, equivalent variations made by above example in every foundation the technical essence of the utility model, falls
Enter within the scope of protection of the utility model.
Claims (10)
1. bi-directional filtered injection needle, includes the draw point of needle stand, needle stand front end, needle stand rear end is equipped with the taper being connect with syringe
Hole, it is characterised in that：Suction passage, output channel are equipped in the needle stand, suction passage, output channel front end and draw point connect
Logical, suction passage, output channel rear end are connected to bellmouth, and suction passage is equipped with suction filter chamber, before suction filter chamber
Both ends are equipped with the unidirectional valve member of sucking of one-way conduction from the front to the back afterwards, and suction filter intracavitary is equipped with suction filter part, output channel
It is equipped with output filtering chamber, the rear and front end of output filtering chamber is equipped with the output one-way valve part of one-way conduction from the front to the back, output
Output filtering part is equipped in filter chamber.
2. bi-directional filtered injection needle according to claim 1, it is characterised in that：The needle stand front end be internally provided with
The injection road of draw point connection, injection road front end connect conducting with draw point rear end, and injection road rear end is equipped with Y type liquid separations road, liquid separation road
Front end be connected with injection road rear end, and liquid separation road rear end is corresponding with suction passage, output channel respectively to be connected.
3. bi-directional filtered injection needle according to claim 1, it is characterised in that：The bellmouth front end is equipped with Y types
Drain road, drain road rear end is connected with bellmouth, and drain road front end corresponds respectively to absorbing path, output channel correspondence is led
It is logical.
4. bi-directional filtered injection needle according to claim 2, it is characterised in that：The injection road and draw point joint
Equipped with sealing ring.
5. bi-directional filtered injection needle according to claim 1, it is characterised in that：The suction filter part is to suck
Filter membrane, the setting of suction filter film are kept away in suction filter intracavitary by rear side, and the output filtering part is output filtering film, is exported
Filter membrane setting leans on front side in output filtering chamber.
6. bi-directional filtered injection needle according to claim 1, it is characterised in that：The unidirectional valve member of the sucking, output
Unidirectional valve member is check valve, and check valve includes valve chamber, the spool in valve chamber, spring, valve chamber and suction passage or output channel
Concentric and communicate, the internal diameter of valve chamber is more than suction passage or output channel internal diameter, and spool outer diameter is consistent with valve chamber internal diameter, spool
Taper or the protrusion of arc are equipped at front end face axle center, convex direction is consistent with check valve one-way conduction direction before protrusion, lug boss
Divide and extend to inside suction passage or output channel, spring is arranged in the valve chamber on rear side of spool, and spool is equipped with to flow for liquid
The through-hole crossed.
7. bi-directional filtered injection needle according to claim 6, it is characterised in that：The through-hole is uniform along spool axle center
Setting, wall surface of the hole of the through-hole close to spool axle center side are more than raised maximum radius to spool axle center distance.
8. bi-directional filtered injection needle according to claim 6, it is characterised in that：The through-hole is by spool peripheral surface
To the recess of valve core inside, recess bottom surface is more than raised maximum radius to spool axle center distance.
9. bi-directional filtered injection needle according to claim 1, it is characterised in that：Suction passage or output channel and valve chamber
The wall surface of joint is the conical surface or globoidal structure coincideing with protrusion.
10. bi-directional filtered injection needle according to claim 1, it is characterised in that：The needle stand include front needle seat, after
Needle stand, front needle seat front end are connect with draw point, and bellmouth is arranged at rear needle stand rear portion, and front needle seat rear end is Nian Jie with rear needle stand front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644655.1U CN207898741U (en) | 2017-06-05 | 2017-06-05 | Bi-directional filtered injection needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644655.1U CN207898741U (en) | 2017-06-05 | 2017-06-05 | Bi-directional filtered injection needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207898741U true CN207898741U (en) | 2018-09-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720644655.1U Expired - Fee Related CN207898741U (en) | 2017-06-05 | 2017-06-05 | Bi-directional filtered injection needle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236942A (en) * | 2019-06-28 | 2019-09-17 | 江苏迪沃生物制品有限公司 | The accurate dispenser of the universal automatic switchover of one kind and its application method |
| CN111150914A (en) * | 2020-01-17 | 2020-05-15 | 中南大学湘雅医院 | Respiratory support airway clearing device for critical medicine department |
| KR20220170680A (en) * | 2021-06-23 | 2022-12-30 | 박선경 | Check valve for needleless injector |
-
2017
- 2017-06-05 CN CN201720644655.1U patent/CN207898741U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236942A (en) * | 2019-06-28 | 2019-09-17 | 江苏迪沃生物制品有限公司 | The accurate dispenser of the universal automatic switchover of one kind and its application method |
| CN111150914A (en) * | 2020-01-17 | 2020-05-15 | 中南大学湘雅医院 | Respiratory support airway clearing device for critical medicine department |
| KR20220170680A (en) * | 2021-06-23 | 2022-12-30 | 박선경 | Check valve for needleless injector |
| KR102599493B1 (en) | 2021-06-23 | 2023-11-06 | 박선경 | Check valve for needleless injector |
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