CN104225724A - Valve-type prefilled syringe - Google Patents
Valve-type prefilled syringe Download PDFInfo
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- CN104225724A CN104225724A CN201410477560.6A CN201410477560A CN104225724A CN 104225724 A CN104225724 A CN 104225724A CN 201410477560 A CN201410477560 A CN 201410477560A CN 104225724 A CN104225724 A CN 104225724A
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- needle
- needle holder
- injection port
- wall
- valve type
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Abstract
The invention relates to a valve-type prefilled syringe which comprises a needle (1) and a needle tube (2), wherein the front end of the needle tube (2) is also provided with a clamping ring base (7) which is arranged around an injection port base (4); the root of a needle base (3) is provided with a clamping ring (8); the clamping ring (8) is clamped in the clamping ring base (7); the needle base (3) is connected with the needle tube (2) by virtue of the clamping ring (8) and the clamping ring base (7). Compared with the prior art, the valve-type prefilled syringe has the advantages that the needle base is connected with the injection port base by virtue of the clamping ring, a through hole of the needle base is easily aligned with a slot of the injection port base, so that the valve-type prefilled syringe is convenient and free to close and open, is convenient, accurate and reliable in assembly and use, is easy to manufacture and has various indexes conforming to the pharmaceutical package specifications.
Description
Technical field
The present invention relates to medical packaging field, particularly pre-encapsulated injector.
Background technology
Pre-encapsulated injector can trace back to the Europe of the eighties in last century, ampoule traditional at that time, cillin bottle dominate; Now, the total value of pre-encapsulated injector in European market being stored medicament by needle tubing packaging has reached 3,000,000,000 dollars, and keeps the growth of average annual about 8%-10%.Compared with European market, pre-encapsulated injector is relatively short in the developing history of the U.S., but it is quite optimistic to increase prospect.
Packaging that pre-encapsulated injector has stores medicament function, it is easy and simple to handle, quick to make it have, safety and low cost factor.In addition, compared with the manner of packing of other injection medicine preparations, pre-encapsulated injector can significantly reduce the chance obscured between medicine and contact with air; Along with the exploitation of more biological preparation and expensive drugs, pre-encapsulated injector can reduce even eliminates the excessive problem of fill.
Existing pre-encapsulated injector comprises the pre-encapsulated injector of band syringe needle, react with metal syringe needle in syringe needle for a long time to prevent medicine, people have developed disclosed in CN1138577C " injector carrying medicine ", it comprises syringe needle and needle tubing, the needle holder with interior spiral shell is spun on to be had on the injector to inject mouth seat of outer spiral shell, during injection, rotary needle headstock, make the hole on the groove aligning injection port seat wall of the straight-through syringe needle mesopore on its inwall, valve open between syringe needle and needle tubing, medicinal liquid enters syringe needle, can prepare injection.
The defect of above-mentioned injector carrying medicine is: be connected owing to being turned by internal and external screw between needle holder with injection port seat, when assembling or preparation injection, the groove of the straight-through syringe needle mesopore on needle holder inwall is difficult to aim at the hole on injection port seat wall, cause valve closes to open to be difficult to determine, be single cavity in needle holder, groove is darker, the demoulding is yielding, and part quality is unstable, cannot realize Reliable Products.Because injection port seat external spiral has superposed injection port seat length, liquor residue amount is increased, unlatching completes in direct rotary needle headstock mode, and the interference fit between needle holder and injection port seat, make it rotate painstakingly, and easily cause contact stain.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of valve type pre-encapsulated injector, and the valve closes of this valve type pre-encapsulated injector opens convenient, accurately and reliably.
The problem that the present invention is the above-mentioned proposition of solution is adopted solution to be:
Valve type pre-encapsulated injector, it comprises syringe needle and needle tubing, and the root of syringe needle is provided with needle holder, and needle tubing front end is provided with injection port seat; The sidewall of injection port seat has through hole, the inwall of needle holder has the groove with needle central pipe UNICOM; Needle holder is enclosed within injection port seat;
The front end of described needle tubing is also provided with retaining ring seat, and retaining ring seat is arranged around injection port seat, and the root of needle holder is provided with snap ring, and snap ring is stuck in retaining ring seat, and needle holder is connected with needle tubing by snap ring, retaining ring seat.
In such scheme, described needle holder is connected with injection port seat interference seal, and the tapering of needle holder inwall and injection port seat outer wall is 1-3 °; Interference seal stroke is 0.8-1mm.
In such scheme, the through hole of described injection port seat is two, and the groove on needle holder inwall is two; Be outwardly toroidal outside described through hole, bell-mouthed tapering is 47-52 °.
In such scheme, the height of described snap ring is 0.5-1mm.
In such scheme, in described needle holder, cover has protective sleeve, and described needle holder outer wall is provided with reinforcement, and the inwall of protective sleeve is provided with the reinforcement groove coordinated with described reinforcement; Needle holder outer wall is also provided with location rib, the inwall of protective sleeve is also provided with the positioning bar groove coordinated with positioning bar;
The folding positioning strip and folding positioning strip groove that cooperatively interact is respectively equipped with on the lower end inner wall of described protective sleeve He on retaining ring seat outer wall.
In such scheme, the bottom outer wall of described protective sleeve has anti-skidding striped.
In such scheme, described valve type pre-encapsulated injector also comprises the piston be arranged in needle tubing, and the front end surface of piston is provided with interlayer.
In such scheme, described interlayer is made up of the material identical with needle cannula material.
In such scheme, the inclined-plane that the bottom surface, lower end of the groove on described needle holder inwall skids off for ease of mould.
In such scheme, described protective sleeve outer wall and needle tubing outer wall are respectively equipped with telltale mark.
Compared with prior art, the invention has the advantages that:
1, the needle holder of prior art is connected with the mode that injection port seat adopts internal and external screw to enter, when assembling or preparation injection, the groove of the straight-through syringe needle mesopore on needle holder inwall is difficult to aim at the hole on mouth seat wall, causes valve closes to open uncertain, and assembling and use are all inconvenient.
Needle holder of the present invention and injection port seat adopt the mode of snap ring to be connected, and the through hole of needle holder and the groove of injection port seat are easily aimed at reliably, closed open convenient, assembling and easy to use and reliable.
2, in prior art, the groove conveniently on machined needles headstock inwall, technological requirement needle holder inwall and injection port seat outer wall have larger tapering, and interference seal stroke distances is too short, cannot ensure positiver sealing.
Needle holder inwall of the present invention and injection port seat outer wall have less tapering, and needle holder inwall has sizable interference stroke at injection port seat, ensure described needle holder and injection port seat positiver sealing.
3, in prior art, needle holder is single cavity, and groove is comparatively dark, and the demoulding is yielding.
Because needle holder inwall has less tapering, during groove on machined needles headstock inwall, groove can not do very dark, also must be provided with demoulding derivation groove conveniently stripped, therefore, the groove on needle holder inwall of the present invention is two, the through hole of described injection port seat is two, to improve the flow of medicinal liquid.And needle holder of the present invention adopts two shallow slot and the demoulding to derive the groove demoulding, the demoulding is smooth and easy, is unlikely to cause because of distortion scrapping.
In addition, the through hole of described injection port seat is two, adds man-hour, just utilizes and supports at through hole two internal mold of root hole inner mould core to injection port seat, can avoid the swing of internal mold during injection moulding, improve machining accuracy.Two through holes are equipped with horn mouth chamfering, to ensure not produce burr, cloak.
4, the height of described snap ring is 0.5-1mm, and needle holder inwall and injection port seat outer wall have less tapering, ensures that interference seal stroke distances is greater than 0.5-1mm, to facilitate needle holder to be stuck in retaining ring seat by snap ring, ensures positiver sealing.In prior art, because mouth seat external spiral has superposed injection port seat length, liquor residue amount is increased, the present invention adopts snap method to avoid increasing mouth seat length, and liquor residue amount is reduced.
5, in prior art, unlatching completes in direct rotary needle headstock mode, and the interference fit between needle holder and injection port seat, make it rotate painstakingly, and easily cause contact stain.On syringe needle of the present invention, cover has protective sleeve, and described needle holder outer wall upper end is provided with location rib, and the inwall upper end of protective sleeve is provided with the positioning bar groove coordinated with described rib, inlays location.Protective sleeve inwall lower end is provided with closed unlatching rib, and described retaining ring seat outer wall closes unlatching muscle groove, composition turn-knob switch in it corresponding being provided with.The bottom outer wall of protective sleeve has anti-skidding striped; the outer wall of protective sleeve and needle tubing outer wall are marked with positioning mark; rotate password protection sheath to 90 to the left or to the right to spend; protective sleeve is by reinforcement groove, reinforcement rotary needle headstock; needle holder rotates to UNICOM's needle tubing and needle position, not only free and relaxed but also guarantee quick, health.
6, the front end surface of piston is provided with interlayer, and interlayer is made up of the material identical with needle cannula material, substantially can completely cut off contacting of medicinal liquid and rubber on piston, reduces reaction possible between rubber and medicinal liquid.
The present invention is easy to manufacture, indices all meets medical packaging specification.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation of needle tubing front end.
Fig. 3 is the structural representation of needle holder.
Fig. 4 is the sectional view of needle holder.
Fig. 5 is the sectional view of protective sleeve.
Fig. 6 is the top view of needle holder.
Fig. 7 is the sectional view of piston.
Fig. 8 is the schematic diagram of protective sleeve.
Fig. 9 is the schematic diagram of needle tubing.
In figure: 1-syringe needle, 2-needle tubing, 3-needle holder, 4-injection port seat, 5-through hole, 6-groove, 7-retaining ring seat, 8-snap ring, 9-protective sleeve, 10-reinforcement, 11-reinforcement groove, the anti-skidding striped of 12-, 13-piston, 14-interlayer, 15-positioning bar, 16-positioning bar groove, 17-folding positioning strip, 18-folding positioning strip groove, 19-telltale mark.
Detailed description of the invention
Introduce the present invention further below by embodiment, but embodiment can not be construed as limiting the invention.
Valve type pre-encapsulated injector embodiment of the present invention as shown in Figure 1, it comprises syringe needle 1 and needle tubing 2, and the root of syringe needle 1 is provided with needle holder 3, and needle tubing 2 front end is provided with injection port seat 4; The sidewall of injection port seat 4 has through hole 5, the inwall of needle holder 3 has the groove 6 with syringe needle 1 central canal UNICOM; Needle holder 3 is enclosed within injection port seat 4;
As shown in Figure 2,3, 4, the front end of described needle tubing 2 is also provided with retaining ring seat 7, and retaining ring seat 7 is arranged around injection port seat 4, and the root of needle holder 3 is provided with snap ring 8, and snap ring 8 is stuck in retaining ring seat 7, and needle holder 3 is connected with needle tubing 2 by snap ring 8, retaining ring seat 7.The height of described snap ring 8 is 0.5-1mm.
Described needle holder 3 is connected with injection port seat 4 interference seal, and the tapering of needle holder 3 inwall and injection port seat outer wall is 1-3 °.Interference seal stroke is 0.5-1mm.The through hole 5 of described injection port seat 4 is two, and the groove 6 on needle holder 3 inwall is two; The diameter of described through hole 5 is 0.8-1mm, and outside is outwardly toroidal, and bell-mouthed tapering is 47-52 °.As shown in Figure 4, the inclined-plane that the bottom surface, lower end of the groove 6 on described needle holder 3 inwall skids off for ease of mould.
In described needle holder 3, cover has protective sleeve 9, and as shown in Fig. 3,5,6, described needle holder 3 outer wall is provided with reinforcement 10, and the inwall of protective sleeve 9 is provided with the reinforcement groove 11 coordinated with described reinforcement 10.Needle holder 3 outer wall is also provided with positioning bar 15, the inwall of protective sleeve 9 is also provided with the positioning bar groove 16 coordinated with positioning bar 15;
As shown in Fig. 5,9, on the lower end inner wall of described protective sleeve 9 He on retaining ring seat 7 outer wall, be respectively equipped with the folding positioning strip 17 and folding positioning strip groove 18 that cooperatively interact.
Certainly, folding positioning bar groove 18 also can be arranged on the lower end inner wall of protective sleeve 9, and folding positioning bar 17 is arranged on retaining ring seat 7 outer wall.
As shown in Figure 8,9, the bottom outer wall of described protective sleeve 9 has anti-skidding striped 12.Described protective sleeve 9 outer wall and needle tubing 2 outer wall are respectively equipped with telltale mark 19.
As shown in Figure 7, valve type pre-encapsulated injector also comprises the piston 13 be arranged in needle tubing 2, and the front end surface of piston 13 is provided with interlayer 14.Described interlayer 14 is made up of the material (as glass material etc.) identical with needle cannula material.
Claims (10)
1. valve type pre-encapsulated injector, it comprises syringe needle (1) and needle tubing (2), and the root of syringe needle (1) is provided with needle holder (3), and needle tubing (2) front end is provided with injection port seat (4); The sidewall of injection port seat (4) has through hole (5), the inwall of needle holder (3) has the groove (6) with syringe needle (1) central canal UNICOM; Needle holder (3) is enclosed within injection port seat (4);
It is characterized in that: the front end of described needle tubing (2) is also provided with retaining ring seat (7), retaining ring seat (7) is arranged around injection port seat (4), the root of needle holder (3) is provided with snap ring (8), snap ring (8) is stuck in retaining ring seat (7), and needle holder (3) is connected with needle tubing (2) by snap ring (8), retaining ring seat (7).
2. valve type pre-encapsulated injector as claimed in claim 1, it is characterized in that: described needle holder (3) is connected with injection port seat (4) interference seal, the tapering of needle holder (3) inwall and injection port seat outer wall is 1-3 °; Interference seal stroke is 0.5-1mm.
3. valve type pre-encapsulated injector as claimed in claim 2, it is characterized in that: the through hole (5) of described injection port seat (4) is two, the groove (6) on needle holder (3) inwall is two; Described through hole (5) outside is outwardly toroidal, and bell-mouthed tapering is 47-52 °.
4. valve type pre-encapsulated injector as claimed in claim 1, is characterized in that: the height of described snap ring (8) is 0.5-1mm.
5. valve type pre-encapsulated injector as claimed in claim 1, it is characterized in that: the upper cover of described needle holder (3) has protective sleeve (9), described needle holder (3) outer wall is provided with reinforcement (10), and the inwall of protective sleeve (9) is provided with the reinforcement groove (11) coordinated with described reinforcement (10); Needle holder (3) outer wall is also provided with location rib (15), the inwall of protective sleeve (9) is also provided with the positioning bar groove (16) coordinated with positioning bar (15);
The folding positioning strip (17) and folding positioning strip groove (18) that cooperatively interact is respectively equipped with on the lower end inner wall of described protective sleeve (9) He on retaining ring seat (7) outer wall.
6. valve type pre-encapsulated injector as claimed in claim 5, is characterized in that: the bottom outer wall of described protective sleeve (9) has anti-skidding striped (12).
7. valve type pre-encapsulated injector as claimed in claim 1, it is characterized in that: it also comprises the piston (13) be arranged in needle tubing (2), the front end surface of piston (13) is provided with interlayer (14).
8. valve type pre-encapsulated injector as claimed in claim 7, is characterized in that: described interlayer (14) is made up of the material identical with needle cannula material.
9. valve type pre-encapsulated injector as claimed in claim 3, is characterized in that: the inclined-plane that the bottom surface, lower end of the groove (6) on described needle holder (3) inwall skids off for ease of mould.
10. valve type pre-encapsulated injector as claimed in claim 5, is characterized in that: described protective sleeve (9) outer wall and needle tubing (2) outer wall are respectively equipped with telltale mark (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477560.6A CN104225724B (en) | 2014-09-18 | 2014-09-18 | Valve-type prefilled syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477560.6A CN104225724B (en) | 2014-09-18 | 2014-09-18 | Valve-type prefilled syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104225724A true CN104225724A (en) | 2014-12-24 |
| CN104225724B CN104225724B (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410477560.6A Active CN104225724B (en) | 2014-09-18 | 2014-09-18 | Valve-type prefilled syringe |
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| Country | Link |
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| CN (1) | CN104225724B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273864A (en) * | 1999-12-01 | 2000-11-22 | 巫晓林 | Injector carrying medicine |
| US20040064041A1 (en) * | 2002-05-30 | 2004-04-01 | Lazzaro Frank A. | Front-loading medical injector and syringes, syringe interfaces, syringe adapters and syringe plungers for use therewith |
| JP2005296135A (en) * | 2004-04-07 | 2005-10-27 | Jms Co Ltd | Syringe with connector, connector for use in syringe, and syringe |
| CN101163515A (en) * | 2005-02-10 | 2008-04-16 | Sgpf有限公司 | Passively guarded pre-filled injection syringe |
| CN202342609U (en) * | 2011-12-13 | 2012-07-25 | 山东威高集团医用高分子制品股份有限公司 | Protective cap for prefilled syringe |
| CN202844253U (en) * | 2012-10-30 | 2013-04-03 | 无锡耐思生物科技有限公司 | Disposable pre-filled injector |
| CN103656799A (en) * | 2013-12-02 | 2014-03-26 | 温州市贝普科技有限公司 | Prefilling injector |
-
2014
- 2014-09-18 CN CN201410477560.6A patent/CN104225724B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273864A (en) * | 1999-12-01 | 2000-11-22 | 巫晓林 | Injector carrying medicine |
| US20040064041A1 (en) * | 2002-05-30 | 2004-04-01 | Lazzaro Frank A. | Front-loading medical injector and syringes, syringe interfaces, syringe adapters and syringe plungers for use therewith |
| JP2005296135A (en) * | 2004-04-07 | 2005-10-27 | Jms Co Ltd | Syringe with connector, connector for use in syringe, and syringe |
| CN101163515A (en) * | 2005-02-10 | 2008-04-16 | Sgpf有限公司 | Passively guarded pre-filled injection syringe |
| CN202342609U (en) * | 2011-12-13 | 2012-07-25 | 山东威高集团医用高分子制品股份有限公司 | Protective cap for prefilled syringe |
| CN202844253U (en) * | 2012-10-30 | 2013-04-03 | 无锡耐思生物科技有限公司 | Disposable pre-filled injector |
| CN103656799A (en) * | 2013-12-02 | 2014-03-26 | 温州市贝普科技有限公司 | Prefilling injector |
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| Publication number | Publication date |
|---|---|
| CN104225724B (en) | 2017-01-11 |
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Effective date of registration: 20180502 Address after: 430073 Hubei Wuhan Hongshan District Optics Valley road 41 design city 2 buildings 18 floors 05 rooms. Patentee after: Wuhan Promotion Technology Co., Ltd. Address before: 430060 30A, 19 people's Hospital of Wuhan University, Wuchang District, Wuhan, Hubei. Patentee before: Wu Xiaolin |