CN2810627Y - Safety syringe - Google Patents
Safety syringe Download PDFInfo
- Publication number
- CN2810627Y CN2810627Y CN 200520000450 CN200520000450U CN2810627Y CN 2810627 Y CN2810627 Y CN 2810627Y CN 200520000450 CN200520000450 CN 200520000450 CN 200520000450 U CN200520000450 U CN 200520000450U CN 2810627 Y CN2810627 Y CN 2810627Y
- Authority
- CN
- China
- Prior art keywords
- inner core
- wing
- overcoat
- needle stand
- needle
- 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.)
- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a safety type syringe which comprises an outer sleeve, an inner cylinder arranged in the outer sleeve, a needle seat, an injection needle, an elastic assembly, a sealing plug and a blocking plug, wherein the top end of the outer sleeve is extended and provided with a protruding head, the central position at the top end of the protruding head is provided with a needle hole, and the tail part of the inner periphery of the protruding head is provided with an inner flange; the needle seat is arranged in the outer sleeve, the needle seat is provided with a front extension wing which can radially retreat under the condition of compression, and the top end of the front extension wing is provided with an outer flange which is clamped at the front end of the inner flange; the injection needle is arranged in the central position of the needle seat; the elastic assembly is pressed and arranged between the inner walls of the needle seat and the protruding head along axial direction; the sealing plug is arranged at the end of the needle seat, and is sealed between the outer wall of the needle seat and the inner wall of the outer sleeve; the blocking plug is arranged in the inner cylinder, and is sealed at the top end of the inner cylinder, and the inner diameter of the inner cylinder is greater than the outer diameter of the needle seat.
Description
Technical field
This utility model relates to syringe, particularly relate to a kind of after injection is finished, the safe syringe that Tip protection can be got up.
Background technology
Present widely used disposable syringe because it is promptly discarded after disposable use, therefore has convenient, healthy characteristics, can effectively prevent cross infection.But after use, because outside needle point is exposed to, thereby exist the potential safety hazard that medical personnel are stabbed by needle point, so just increased the danger that medical personnel infect by blood.For this reason, people have developed many safe syringes that needle point is protected.
As a kind of safety injector (US5084018), its entry needle is fixed in and can slides beyond the Great Wall in axial sliding, and the front portion of overcoat is provided with flange, thereby sliding plug of restriction and entry needle is mobile; Front end at injecting needle base and overcoat has the spring that compresses, and therefore sliding plug and entry needle have trend in axial sliding all the time; When the inner core of hollow was pushed into front end vertically, the constraint that can make sliding plug break away from flange moved forward, thereby discharges injecting needle base, and like this, under the effect of elastic force, entry needle will be fallen into inner core, and can't reuse, and realizes the safety self-destruct function.But, the safety injector of this structure, because entry needle fixedly is the clamping action of filling in by sliding, reliability is relatively poor, to the precision of mould and the performance requirement height of material, storing, having the entry needle hidden danger of retraction automatically in the transportation, simultaneously, also having when the injection acupuncture treatment with regard to automatic retraction and hidden danger that can't normal injection.
Though existing both at home and abroad many patents provide safe syringe, most because of complex structure, manufacturing cost is high or because of using inconvenience, function imperfection and fail to be used widely.
The innovation and creation content
The purpose of this utility model provides a kind of simple in structure, with low cost and safe syringe that Tip protection can be got up after injection is finished.
For achieving the above object, this utility model is taked technical scheme: a kind of safe syringe, and it includes an overcoat and is arranged on the interior inner core of described overcoat, and described inner core is the cylinder of a hollow, and front end is provided with opening; The top extension of described overcoat sets out one and protrudes head, and the center, top of described protrusion head is provided with a pin hole, and the tail portion of a described protrusion inner periphery is provided with an inward flange; One needle stand, it is arranged in the described overcoat, but described needle stand is provided with the wing that protracts of cyclic pressurized radial contraction, and the top of the described wing that protracts is provided with outward flange, and described outward flange is buckled in the front end of described inward flange; One entry needle, it is arranged on the center of described needle stand, and passes described pin hole; One elastic parts, it is pressed on described needle stand vertically and protrudes between the inwall of head; One sealing-plug, it is arranged on the end of described needle stand, and is sealed between the inwall of the outer wall of needle stand and overcoat; One stops up, and it is arranged in the described inner core, and is sealed in the top of inner core; The internal diameter of described inner core is greater than the external diameter of described needle stand.
In the above-mentioned safe syringe, the outer wall place of described inner core front end is provided with piston.
In the above-mentioned safe syringe, the described cyclic wing that protracts is divided into average many lobes, and the postmedian of its cylindrical is provided with lobe; The external diameter of described lobe is slightly larger than the internal diameter of described sealing-plug.
In the above-mentioned safe syringe, the described cyclic wing that protracts is divided into 4 average lobes.
In the above-mentioned safe syringe, described elastic parts is a spring.
In the above-mentioned safe syringe, the end of described inner core is provided with the thrust plate that thumb press is used, and described overcoat end is provided with the wing plate that fingerhold is used, and the end of described inner core cylindrical is provided with a limited block.
This utility model is owing to take above design, and it has the following advantages: 1, in the drawing liquid aerofluxus or when injecting, sealing-plug can fully contact with piston, helps operating, and can all annotate medicinal liquid.2, needle stand is to realize fixed by the buckle of inward flange and outward flange in this utility model, and the wing ability radial contraction when being oppressed of only protracting, therefore reliability of the present utility model improves, and can effectively avoid storing, entry needle retraction and the hidden danger that can't normally use automatically when retraction and injection acupuncture treatment automatically of the entry needle in the transportation.3, after injection was finished, entry needle was bound to the inside of inner core, made outside the syringe needle of entry needle is not exposed to fully, can stop medical personnel's accident and stab.4, this utility model also have simple in structure, with low cost, be easy to advantages such as realization.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is a local enlarged diagram of the present utility model
Fig. 3 is the user mode sketch map of this utility model after injection finishes
The specific embodiment
As shown in Figure 1, be a kind of safe syringe that this utility model provides, it includes an overcoat 1 and is arranged on a inner core 2 in the overcoat 1, and inner core 2 is the cylinder of a hollow, and front end is provided with opening.
The top of overcoat 1 is extended and is set out one and protrude 11, protrudes a center, top of 11 and is provided with a pin hole 12, and the tail portion of protruding 11 inner periphery is provided with an inward flange 13; One needle stand 3, it is arranged in the overcoat 1, needle stand 3 is provided with the cyclic wing 31 that protracts, but the wing 31 pressurized radial contraction of protracting, in order to guarantee good contractive effect, the wing 31 that protracts consists of the best with many lobes, the wing 31 that protracts generally speaking is that pintongs forms, and the wing 31 that promptly protracts can be average is divided into pintongs, in addition, the protract top of the wing 31 is provided with outward flange 32, and outward flange 32 is buckled in the front end (as shown in Figure 2) of inward flange 13; One entry needle 4, it is arranged on the center of needle stand 3, and passes pin hole 12; One elastic parts is a spring 5 in the present embodiment, and it is pressed on needle stand 3 vertically and protrudes between 11 the inwall; One sealing-plug 6, it is arranged on the end of needle stand 3, and is sealed between the inwall of the outer wall of needle stand 3 and overcoat 1; One stops up 7, and it is arranged in the inner core 2, and is sealed in the top of inner core 2, stops up 7 by being provided with, and just the opening with inner core 2 front ends seals; In addition, the outer wall place of inner core 2 front ends also is provided with piston 8, and piston 8 is set in the front end of inner core 2, and it is the rubber-like rubber, forms with the inner chamber of overcoat 1 to closely cooperate, and by moving forward and backward of inner core 2, can aspirate or inject liquid.
In the foregoing description, the internal diameter of inner core 2 is greater than the external diameter of needle stand 3; And the postmedian of the wing 31 cylindricals that protract is provided with lobe 33, and the external diameter of lobe 33 is slightly larger than the internal diameter of sealing-plug 6.In addition, the end of inner core 2 is provided with the thrust plate 21 that thumb press is used, and overcoat 1 end is provided with the wing plate 14 that fingerhold is used.For fear of maloperation before injection, syringe is destroyed in advance, also special end at inner core 2 cylindricals is provided with a limited block 22; Limited block 22 is removed when syringe uses, specifically, after suction injection, aerofluxus finish, limited block is got rid of exactly, injects then.
This utility model when in use; can the same injection of carrying out medicinal liquid with common syringe; when injection finishes; the front end of inner core 2 contacts with sealing-plug 6; stopping up 7 contacts with the end of needle stand 3; at this moment; only need continue to enforce inner core 2 and continue reach; because the internal diameter of inner core 2 is greater than the external diameter of needle stand 3; so 2 of inner cores promote sealing-plug 6 displacement forward; sealing-plug 6 displacement forward makes sealing-plug 6 compressings on the wing 31 cylindricals that protract of needle stand 3; furtherly; sealing-plug 6 compressings are on the lobe 33 of the wing 31 of protracting; the wing 31 that the protracts tailing edge radial contraction that is under pressure just makes its vertical outward flange 32 radial contraction thereupon, when outward flange 32 breaks away from the buckle of inward flanges 13; under the effect of spring 5; with needle stand 3 with stop up 7 and spring into together among inner core 2 hollow bulbs,, so just entry needle 4 is protected because entry needle 4 is fixed on the needle stand 3.
Claims (10)
1, a kind of safe syringe, it includes an overcoat and is arranged on a inner core in the described overcoat, and described inner core is the cylinder of a hollow, and front end is provided with opening, it is characterized in that:
The top extension of described overcoat sets out one and protrudes head, and the center, top of described protrusion head is provided with a pin hole, and the tail portion of a described protrusion inner periphery is provided with an inward flange;
One needle stand, it is arranged in the described overcoat, but described needle stand is provided with the wing that protracts of cyclic pressurized radial contraction, and the top of the described wing that protracts is provided with outward flange, and described outward flange is buckled in the front end of described inward flange;
One entry needle, it is arranged on the center of described needle stand, and passes described pin hole;
One elastic parts, it is pressed on described needle stand vertically and protrudes between the inwall of head;
One sealing-plug, it is arranged on the end of described needle stand, and is sealed between the inwall of the outer wall of needle stand and overcoat;
One stops up, and it is arranged in the described inner core, and is sealed in the top of inner core;
The internal diameter of described inner core is greater than the external diameter of described needle stand.
2, safe syringe according to claim 1 is characterized in that: the outer wall place of described inner core front end is provided with piston.
3, safe syringe according to claim 1 is characterized in that: the described cyclic wing that protracts is divided into average many lobes, and the postmedian of its cylindrical is provided with lobe; The external diameter of described lobe is slightly larger than the internal diameter of described sealing-plug.
4, safe syringe according to claim 2 is characterized in that: the described cyclic wing that protracts is divided into average many lobes, and the postmedian of its cylindrical is provided with lobe; The external diameter of described lobe is slightly larger than the internal diameter of described sealing-plug.
5, according to claim 3 or 4 described safe syringes, it is characterized in that: the described cyclic wing that protracts is divided into 4 average lobes.
6, according to claim 1 or 2 or 4 described safe syringes, it is characterized in that: described elastic parts is a spring.
7, safe syringe according to claim 5 is characterized in that: described elastic parts is a spring.
8, according to claim 1 or 2 or 3 or 4 or 7 described safe syringes, it is characterized in that: the end of described inner core is provided with the thrust plate that thumb press is used, described overcoat end is provided with the wing plate that fingerhold is used, and the end of described inner core cylindrical is provided with a limited block.
9, safe syringe according to claim 5 is characterized in that: the end of described inner core is provided with the thrust plate that thumb press is used, and described overcoat end is provided with the wing plate that fingerhold is used, and the end of described inner core cylindrical is provided with a limited block.
10, safe syringe according to claim 6 is characterized in that: the end of described inner core is provided with the thrust plate that thumb press is used, and described overcoat end is provided with the wing plate that fingerhold is used, and the end of described inner core cylindrical is provided with a limited block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000450 CN2810627Y (en) | 2005-02-06 | 2005-02-06 | Safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000450 CN2810627Y (en) | 2005-02-06 | 2005-02-06 | Safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2810627Y true CN2810627Y (en) | 2006-08-30 |
Family
ID=36937013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520000450 Expired - Fee Related CN2810627Y (en) | 2005-02-06 | 2005-02-06 | Safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2810627Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497017A (en) * | 2017-09-25 | 2017-12-22 | 南京律智诚专利技术开发有限公司 | A kind of disposable injection device with vacuum cavity |
| CN107569747A (en) * | 2017-09-25 | 2018-01-12 | 南京律智诚专利技术开发有限公司 | A kind of disposable injection device |
-
2005
- 2005-02-06 CN CN 200520000450 patent/CN2810627Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497017A (en) * | 2017-09-25 | 2017-12-22 | 南京律智诚专利技术开发有限公司 | A kind of disposable injection device with vacuum cavity |
| CN107569747A (en) * | 2017-09-25 | 2018-01-12 | 南京律智诚专利技术开发有限公司 | A kind of disposable injection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 Termination date: 20130206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |