CN203694265U - Bidirectional filtering type injector - Google Patents

Bidirectional filtering type injector Download PDF

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Publication number
CN203694265U
CN203694265U CN201420048445.2U CN201420048445U CN203694265U CN 203694265 U CN203694265 U CN 203694265U CN 201420048445 U CN201420048445 U CN 201420048445U CN 203694265 U CN203694265 U CN 203694265U
Authority
CN
China
Prior art keywords
needle stand
injection
fluid passage
valves
check
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.)
Withdrawn - After Issue
Application number
CN201420048445.2U
Other languages
Chinese (zh)
Inventor
丁文学
李君�
夏欣瑞
蔡诗荣
袁志远
李娜
尹立刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Weigao Group Medical Polymer Co Ltd
Original Assignee
Shandong Weigao Group Medical Polymer Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Weigao Group Medical Polymer Co Ltd filed Critical Shandong Weigao Group Medical Polymer Co Ltd
Priority to CN201420048445.2U priority Critical patent/CN203694265U/en
Application granted granted Critical
Publication of CN203694265U publication Critical patent/CN203694265U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model discloses a bidirectional filtering type injector which comprises an injector body and a filtering injection needle. The filtering injection needle is composed of a needle tube and a needle base. The needle tube is installed at the front end of an upper needle base body and the rear end of a lower needle base body is connected to a conic head of the injector body. The front end of the lower needle base body is combined with the upper needle base body to form a liquid suction inlet and an injection outlet. A check valve is installed on the lower needle base body and is opened in the liquid suction direction of the liquid suction inlet and the injection direction of the injection outlet, and the liquid suction inlet and the injection outlet are respectively provided with a filter. The bidirectional filtering type injector has the advantages of being simple in overall structure, convenient to operate, safe, reliable, low in cost, disposable, capable of effectively avoiding cross infection and the like.

Description

A kind of bi-directional filtered type syringe
Technical field
This utility model relates to syringe, specifically a kind of bi-directional filtered type syringe.
Background technology
As everyone knows, the injection of current clinical use is encapsulated in vial more, and when pricking rubber stopper or cut vial extraction medicinal liquid with emery wheel with the syringe needle of syringe, bottle stopper material bits or glass powder can enter in injection.Traditional syringe does not have filtering function, when extracting liquid medicine, these impurity can be extracted in syringe and direct injection to patient, thereby bring out the diseases such as inflammation of vein.Chinese invention patent application CN102600535A, a kind of entry needle with accurate filter is disclosed, comprise needle tubing and the needle stand with inner via hole, described needle stand inner via hole comprises compare little top, aperture, compare great bottom, aperture and has the pars intermedia of upwards bringing gradually reduced bore structure together, described needle tubing one end is placed in the top of described inner via hole, is provided with a filter in the inner via hole of described needle stand.Because this entry needle feed pathway and liquid outlet channel are same passages, after filtration, need again to change injection needle, but in filtering needle and injection needle Renewal process, have by the risk of the pollution of antibacterial or virus, clinical manipulation is also inconvenient simultaneously.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, can effectively realize filtering function and when injection without the bi-directional filtered type syringe of changing syringe needle.
The technical solution of the utility model is: a kind of bi-directional filtered type syringe, comprise syringe and filter entry needle, described entry needle is made up of needle tubing and needle stand, needle tubing is arranged on the front end of needle stand, the rear end of lower needle stand is connected on the conehead of syringe, the front end of lower needle stand is combined with upper needle stand and is formed imbibition entrance and injection outlet, on lower needle stand, check-valves is installed, check-valves is opened in the imbibition direction of imbibition entrance and the injection direction of injection outlet, in imbibition entrance and injection outlet, filter is all installed.
As a kind of preferred structure, the mid portion of lower needle stand upper end upwards extends to form column type fluid passage, this fluid passage becomes injection outlet, injection outlet is around liquid inlet, check-valves is umbrella-shaped structure, and check-valves center has a fixed cover to be enclosed within the outside of column type fluid passage, between the top of check-valves umbrella top and column type fluid passage, forms spatia, one opening is arranged at umbrella top, and edge extends to form flap structure downwards.
Described check-valves adopts the good elastomeric material of elasticity, preferably silica gel material.
The lower end of described column type fluid passage is connected by Connection Block with lower needle stand, has hole on Connection Block, forms liquid inlet.
Described Connection Block top edges is provided with the edge lug boss of an annular, boss in the middle of outside column type fluid passage and edge lug boss corresponding section is provided with, on imbibition filter membrane welding edge boss and middle boss, imbibition filter membrane is except welding portion, the upper needle stand of remainder discord contacts with lower needle stand, form vacant state, improved effective filtration area.
The lower needle stand at the bottom place of described cylinder fluid passage is provided with an annular groove, and injection filter membrane is welded in annular groove.
The beneficial effects of the utility model are that filtration and injection process carry out through two autonomous channels, do not need to change syringe needle, have avoided bacterial infection and virus and cross-contamination.Take out all filtering liquid medicines of medicine and when injection simultaneously, both filtered the impurity in medicinal liquid, also filtered the impurity existing in syringe.That bi-directional filtered syringe of the present utility model has overall structure is simple, easy to operate, safe and reliable, cost is low, disposable use, can effectively avoid the advantages such as cross infection generation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bi-directional filtered type syringe of this utility model.
Fig. 2 is the decomposition texture schematic diagram of the needle stand of the bi-directional filtered type syringe of this utility model.
Flow direction schematic diagram in needle stand when Fig. 3 is this utility model extraction medicinal liquid.
Flow direction schematic diagram in needle stand when Fig. 4 is this utility model liquid medicine injection.
1 syringe in figure, 2 coneheads, 3 entry needles, 4 needle tubings, 5 needle stands, needle stand on 6,7 times needle stands, 8 imbibition entrances, 9 injection outlets, 10 check-valves, 10a fixed cover, 10b umbrella top, 10c flap structure, 10d opening, 11 column type fluid passages, 12 spatias, 13 Connection Blocks, 14 holes, 15 edge lug boss, 16 middle boss, 17 imbibition filter membranes, 18 annular grooves, 19 injection filter membranes.
The specific embodiment
Below in conjunction with accompanying drawing, this utility model is further described.
From Fig. 1-Fig. 4, can find out, a kind of bi-directional filtered type syringe of this utility model, comprise syringe 1 and entry needle 3, described entry needle 3 is made up of needle tubing 4 and needle stand 5, needle tubing 4 is arranged on the front end of needle stand 6, the rear end of lower needle stand 7 is connected on the conehead 2 of syringe 1, the front end of lower needle stand 7 and upper needle stand 6 are in conjunction with forming imbibition entrance 8 and injection outlet 9, on lower needle stand 7, check-valves 10 is installed, check-valves 10 is opened in the imbibition direction of imbibition entrance and the injection direction of injection outlet, in imbibition entrance 8 and injection outlet 9, filter is all installed.
As Fig. 2, shown in Fig. 3 and Fig. 4, the mid portion of lower needle stand 7 upper ends upwards extends to form column type fluid passage 11, this fluid passage becomes injection outlet 9, injection outlet 9 is around liquid inlet 8, check-valves 10 is umbrella-shaped structure, check-valves 10 centers have a fixed cover 10a to be enclosed within the outside of column type fluid passage 11, between the top of check-valves umbrella top 10b and column type fluid passage 11, form spatia 12, umbrella top 10b has an opening 10d, spatia 12 is conducive to umbrella top 10b and produces distortion, shutoff opening 10d in the time extracting medicinal liquid, when injection liquid, strut opening 10d, edge extends to form flap structure 10c downwards, flap structure 10c be similar to skirt the bottom, its inside provides enough spaces for fixed cover 10a, make the outer surface fitting area of fixed cover 10a and column type fluid passage 11 large, the two laminating closely, avoid the medicinal liquid in syringe to pass through from binding face.Flap structure 10c can receive in fixed cover 10a direction, the smooth and easy inflow syringe of medicinal liquid that guiding sucks.In the time of injection liquid, flap structure 10c can open in addition, with upper needle stand 6 internal chamber wall interference fit, shutoff imbibition entrance, guarantees that liquid flows out through injection outlet.
Check-valves 10 adopts the good elastomeric material of elasticity, preferably silica gel material.Silica gel material elasticity is large, morphotropism good, can meet the demand of opening passage and closed channel.
The lower end of column type fluid passage 11 is connected by Connection Block 13 with lower needle stand 7, has hole 14 on Connection Block, forms liquid inlet, and Connection Block 13 can be cross structure as shown in FIG., can be also that other are convenient to the structure connecting.For the ease of defecator is installed, Connection Block 13 top edges are provided with the edge lug boss 15 of an annular, boss 16 in the middle of outside column type fluid passage 11 and edge lug boss 15 corresponding sections are provided with, on imbibition filter membrane 17 welding edge boss 15 and middle boss 16, imbibition filter membrane 17 is except welding portion, the upper needle stand 6 of remainder discord and lower pin 7 seated connections touch, and form vacant state, have improved effective filtration area.
The lower needle stand 7 at the bottom place of cylinder fluid passage 11 is provided with an annular groove 18, and injection filter membrane 19 is welded in annular groove 18.
As shown in Figure 3, check-valves 10 is in the time extracting medicinal liquid, under negative pressure and fluid pressure effect; umbrella limit is that flap structure 10c can shrink formation fluid passage; the opening 10d of umbrella top 10b is because of extruding meeting sealing simultaneously; the edge of liquid process umbrella is by imbibition filter membrane 17, and the hole 14 on Connection Block, enters in syringe 1; As shown in Figure 4, check-valves 10 is in the time of liquid medicine injection, under fluid pressure effect; umbrella limit is that flap structure 10c can open and shuts fluid passage; the opening 10d of umbrella top 10b can open formation fluid passage under pressure; liquid can, through injection filter membrane 19 by cylinder fluid passage 11, enter in needle stand fluid passage through opening 10d, then enters human body by needle tubing 4.

Claims (7)

1. a bi-directional filtered type syringe, comprise syringe and filter entry needle, described entry needle is made up of needle tubing and needle stand, needle tubing is arranged on the front end of needle stand, the rear end of lower needle stand is connected on the conehead of syringe, it is characterized in that: the front end of lower needle stand is combined with upper needle stand and is formed imbibition entrance and injection outlet, on lower needle stand, check-valves is installed, check-valves is opened in the imbibition direction of imbibition entrance and the injection direction of injection outlet, in imbibition entrance and injection outlet, filter is all installed.
2. bi-directional filtered type syringe according to claim 1, it is characterized in that: the mid portion of lower needle stand upper end upwards extends to form column type fluid passage, this fluid passage becomes injection outlet, injection outlet is around liquid inlet, check-valves is umbrella-shaped structure, and check-valves center has a fixed cover to be enclosed within the outside of column type fluid passage, between the top of check-valves umbrella top and column type fluid passage, forms spatia, one opening is arranged at umbrella top, and edge extends to form flap structure downwards.
3. bi-directional filtered type syringe according to claim 1 and 2, is characterized in that: described check-valves adopts resilient elastomeric material to make.
4. bi-directional filtered type syringe according to claim 3, is characterized in that: described check-valves adopts silica gel material to make.
5. bi-directional filtered type syringe according to claim 2, is characterized in that: the lower end of described column type fluid passage is connected by Connection Block with lower needle stand, has hole on Connection Block, forms liquid inlet.
6. bi-directional filtered type syringe according to claim 2, it is characterized in that: described Connection Block top edges is provided with the edge lug boss of an annular, boss in the middle of outside column type fluid passage and edge lug boss corresponding section is provided with, imbibition filter membrane is welded on edge lug boss and middle boss, imbibition filter membrane is except welding portion, the upper needle stand of remainder discord contacts with lower needle stand, forms vacant state.
7. bi-directional filtered type syringe according to claim 2, is characterized in that: the lower needle stand at the bottom place of described cylinder fluid passage is provided with an annular groove, and injection filter membrane is welded in annular groove.
CN201420048445.2U 2014-01-26 2014-01-26 Bidirectional filtering type injector Withdrawn - After Issue CN203694265U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420048445.2U CN203694265U (en) 2014-01-26 2014-01-26 Bidirectional filtering type injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420048445.2U CN203694265U (en) 2014-01-26 2014-01-26 Bidirectional filtering type injector

Publications (1)

Publication Number Publication Date
CN203694265U true CN203694265U (en) 2014-07-09

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Application Number Title Priority Date Filing Date
CN201420048445.2U Withdrawn - After Issue CN203694265U (en) 2014-01-26 2014-01-26 Bidirectional filtering type injector

Country Status (1)

Country Link
CN (1) CN203694265U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736174A (en) * 2014-01-26 2014-04-23 山东威高集团医用高分子制品股份有限公司 Two-way filtration syringe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736174A (en) * 2014-01-26 2014-04-23 山东威高集团医用高分子制品股份有限公司 Two-way filtration syringe
CN103736174B (en) * 2014-01-26 2015-12-02 山东威高集团医用高分子制品股份有限公司 A kind of two-way filtration syringe

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20140709

Effective date of abandoning: 20151202

C25 Abandonment of patent right or utility model to avoid double patenting