CN1029199C - Once used hypodermic syringe - Google Patents
Once used hypodermic syringe Download PDFInfo
- Publication number
- CN1029199C CN1029199C CN 90103604 CN90103604A CN1029199C CN 1029199 C CN1029199 C CN 1029199C CN 90103604 CN90103604 CN 90103604 CN 90103604 A CN90103604 A CN 90103604A CN 1029199 C CN1029199 C CN 1029199C
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- China
- Prior art keywords
- syringe
- socket pipe
- plug
- needle
- annotating
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- Expired - Fee Related
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Abstract
The present invention discloses a once used hypodermic syringe. A cracky wall (34) is arranged on the closed front surface (31) of a socket pipe (3), and the rear (32) of the socket pipe is provided with a hole (33) and at least one opening (35) which is in a contacted range of a driving needle (4) and the socket pipe (3) and is communicated with a rear chamber (12) of a cylindrical needle cylinder (1). The driving needle (4) is provided with a driving needle head (44) on a positioning pin (43) for placing the socket pipe, and the needle head punctures the cracky wall (34) under the action of the thrust force of a pour plug.
Description
What the present invention relates to is disposable hypodermic syringe, this syringe comprises that is held a cylinder syringe of annotating plug, the hollow sleeve that this notes plug has a cylindrical shape is taken over, socket pipe has and can be with foraminous back with the front of the perisporium of cylindrical barrel sealing, a sealing and one, and this hole is used for socket pipe is placed on the alignment pin of annotating the plug driving needle.
Though this very general, annual manufacture and the countless syringe of use amount are referred to as the syringe that can throw away usually, the syringe of this structure, used once after, might not can cancel.
This known syringe, because it mainly is to be made by cheap synthetic material, so it can only be considered as the syringe that to throw away, and can not regard disposable syringe as, can not regard the sort of syringe that only changes syringe needle and do not throw away as certainly.
Yet,, just need a kind of syringe with regard to not re-using with regard to its structure because bloodborne diseases very easily infects.
Existing a kind of syringe of throwing away (US-A-4687467), there is the prolongation of a point at the rear portion of its injection needle, and this extension arrives at the protuberance in the cylindrical barrel.Arrive the stroke end when annotating plug, when promptly arriving the position of releasing liquid, the tip of its socket pipe after by injection needle punctures.Because the hollow structure of driving needle just makes two chambeies of syringe communicate, this just can the total ban repeat function.
But if first user that is to say that not with the whole emptying of syringe (have a mind to or by mistake) amount of liquid of inspiration is more than the amount of liquid that will inject, then this syringe still can reuse.
In addition, the rear portion of the injection needle of this syringe, socket pipe, especially notes are filled in the complex-shaped of end, and promptly driving needle and alignment pin thereof all need special manufacture.
Also has the diverse syringe that can throw away of a kind of shape (EP AI 0291109).This syringe is different fully with the structure of syringe commonly used, because it is annotating the plug end has substituted sealing with a packaged sleeved disk socket pipe, annotating stopper rod can slide in sleeve, so as when to promote to annotate stopper rod (fluid injection stage) stave the centre of disk.Its sealing is sealed disruptive hole in the disk by injection needle and is guaranteed.When the notes plug was pulled, injection needle was pulled out from the hole that disk splits, and two chambers of annotating plug communicate.
But, owing to annotate on the stopper rod flange being arranged, this flange is pressed onto on the flange of annotating in the socket pipe of filling in the disk back, so just two chambers can not be communicated with effectively, can also give the syringe topping up once more like this, in other words, syringe is not disposable.
In addition, also can not process this during reality is made economical, easily to all sealable notes plug of drawing liquid, discharge opeing disk.
The objective of the invention is to overcome above-mentioned defective, and propose a kind of improved syringe according to syringe commonly used, this improvement syringe is disposable use really, and is simultaneously the same with known syringe easily manufactured and economical.
For this reason, what the present invention relates to is to begin the described syringe of part as this paper, it is characterized in that:
The sealing front of-socket pipe comprises an easy breaking cellular wall;
The back of-socket pipe also has another opening at least except a hole is arranged, this opening is in outside driving needle and the contacted scope of socket pipe, and it makes the inside of socket pipe communicate with the back chamber of cylindrical barrel;
-driving needle (4) has a transmission syringe needle on it lays the alignment pin of socket pipe, this transmission syringe needle is used to puncture easy breaking cellular wall under the thrust of annotating plug.
When user when annotating the stopper rod applied thrust, the transmission syringe needle is just broken the wall of socket pipe front, so syringe of the present invention really is disposable syringe.That fearness is exactly that despiteful user adopts any means, and this result also is inevitable, no matter user is wanted to reuse this syringe or thought that the syringe that reuse is thrown away all can not achieve one's goal.
Other features of the present invention are:
-driving needle has a bar of alignment pin being linked notes plug end plate;
The length of the bar of-driving needle is in fact greater than the thickness of socket pipe, so that socket pipe moves between following two positions: in first position, the back of socket pipe is by the plane of structure of the alignment pin of driving needle, and be the pulling force of imbibition annotating what apply beyond the Great Wall this moment; And second position, this back is released injection by end plate this moment from syringe;
-when fluid applies propelling movement power in filling in syringe by notes, the easy breaking cellular wall of transmission punctures, and the sealing of socket pipe is sealed opening by end plate and is guaranteed, and when when annotating plug and apply pulling force and make it be in advanced position, transmission syringe needle and the easy breaking cellular wall segment distance of being separated by;
-this syringe has to stop to annotate gets back into the locking device that is reduced to the cylindrical barrel outside;
-annotate to have beyond the Great Wall to make and annotate the cannelure that plug fractures;
-cylindrical barrel is made by two parts of assembling each other;
-syringe also has stop device, as long as user is operated according to working procedure, this stop device just can stop the notes plug to move fully.
The back of socket pipe is furnished with some openings, so that by the transverse slat sealing of annotating plug.
According to additional features:
The pole of-driving needle is in fact long than the thickness of socket pipe, so that socket pipe is mobile between following two positions: promptly the face at socket pipe reaches at the face of socket pipe mobile between the second position of the plane of structure of the conical alignment pin that constitutes driving needle by the primary importance of end plate;
-in described first position, syringe needle is broken easy breaking cellular wall, the sealing of socket pipe is then sealed opening by end plate and is finished, when the transmission syringe needle second position when easily breaking cellular wall has a segment distance, at this moment, described socket pipe just guarantees that two chambers of cylindrical barrel communicate;
The notes of-locking device prevention cylindrical barrel are got back into and are contracted;
-by a cannelure notes plug is attenuated, so that it is easily broken;
-cylindrical barrel is by two partly assemblings;
-as long as work process no longer continues, stop device just makes moving of notes plug stop fully.
The present invention is further understood in description below in conjunction with accompanying drawing.Wherein:
-Fig. 1 is a front view of the present invention;
-Fig. 2 is a guide wire of alternative shape among Fig. 1;
-Fig. 3 is the rearview of socket pipe;
The partial view that-Fig. 4 opens for the cylindrical needle tube rear end;
-Fig. 5 is the view along Fig. 4 arrow V;
-Fig. 6 is the installation diagram of syringe of the present invention;
-Fig. 7 is another embodiment of syringe of the present invention;
-Fig. 8 is the view along Fig. 7 arrow VIII;
-Fig. 9 is the cutaway view of the syringe of second different embodiment of the present invention.
Hypodermic syringe shown in Figure 1 has a cylindrical barrel 1, and the opening of this syringe is the limit with flange 19; The other end has a conical bottom 13, and the clearing end at this end has a undersized opening short tube 14, and this opening short tube is used to install injection needle 5.
The periphery of the socket pipe of being made by elastomeric material 3 is adjacent to the inwall of cylindrical barrel 1, and the syringe sealing is divided into two chambers 11 and 12.
According to Fig. 2, the driving needle 4 of annotating plug 2 comprises successively:
-transverse slat 22;
-by the bar 41 of plate 22 along the front end extension of the Y-direction syringe of syringe;
-one end that is positioned at bar 41, be generally taper or conical alignment pin 43, the rear side of this alignment pin has a plane of structure 42, and there is a transmission syringe needle 44 its front side.
Use deformable material, for example the socket pipe 3 made of elastomeric material is the overall structure of hollow cylindrical, and its front 31 is sealed, and there is axially open 33 back 32, and the diameter of this opening approximates the diameter of transmission shank 41.
The thickness of the front 31 of the sealing of socket pipe 3 is not wait, the thinner thickness at its middle part 34, thereby tear easily or puncture.Easily broken middle part 34 or the single-piece that forms by a thin plate molding, or make the socket pipe of opening, this opening is at 34 places, middle part of its front, very thin thickness of reuse, easily broken disk shape plate are fixed on this opening, fixing means can be ultrasonic bonding, also can be any other known method.
As shown in Figure 3, these openings 35 circumferentially, their center of circle is on the average circumference between the disk that disk that plate 22 covers and alignment pin 43 plane of structures 42 cover.
The thickness of the rear wall 36 of socket pipe 3 is significantly less than the length of bar 41, so that socket pipe is moved axially between plate 22 dough-making powder 42 along bar 41.As long as socket pipe position in syringe is determined, annotate plug and just can between bar 41 two ends, move freely.
For the face 31 that makes socket pipe 3 the end 13 near said syringes, will annotate plug 2 and pack syringe into and make syringe, and sale in this case.
When using for the first time, draw notes plug 2 along the direction that the notes plug comes out from syringe 1, so that suck injection.In the meantime, the face 32 of socket pipe 3 comes on the face 42 of driving needle 4.
When towards cylindrical barrel bottom 13 bolus plug, at first annotate plug 2 and move with respect to socket pipe 3, come on the face 32 of socket pipe until annotate the plate 22 of plug 2.
In annotating the process that plug and driving needle move with respect to socket pipe 3, originally and the be separated by transmission syringe needle 44 of a very little segment distance of face will puncture the easy part 34 of breaking on the face 31 of socket pipe 3.In addition, when promoting to annotate plug,, make face 31 distortion and guarantee that the transmission syringe needle penetrates this face owing to the resistance resistance on liquid opposite 31.
When annotating plug 2 towards the bottom of cylindrical barrel when mobile, plate 22 is near the face 32 of socket pipe and seal opening 35, and therefore, syringe carries out work as the syringe of known form, and by injection needle 5 fluid that is equipped with in the chamber 11 is discharged.
So far, at user, the function of this syringe function with the syringe of form known at least is identical, unless used punctures socket pipe, otherwise user can see that the present invention can make transmission syringe needle 44 puncture socket pipe 3 highly beneficially.
In order to guarantee the sealing between plate 22 dough-making powder 32, just must close opening really.Can prepare one in case of necessity and exceed face 32 and should be greatly to covering opening 35 towards the diameter of the flange of plate 22, flange.
Because socket pipe 3 has been communicated with two chambers 11 and 12, syringe also just can not be adorned liquid more again, so it just can not be reused.
Annotate plug 2 in order to stop user to take out, adorn liquid to cylindrical barrel 1, in the syringe of this opening, locking device is housed from the opening of syringe 1.
As shown in Figure 4 and Figure 5, these locking devices can be tongue mouth 15 shapes, make this tongue mouth by open a little breach on the wall of cylindrical barrel 1, and these tongue mouths are separated by wall towards the axle of syringe, and similar to the end of described syringe.
As shown in Figure 5, when in the conventional part of annotating plug 2 a criss-cross cross section being arranged, four tongue mouths just can be arranged, each tongue mouth is arranged in annotates the empty quadrant that plug is formed.
Certainly, locking device also can be other different structures.For example, in the inside of cylindrical barrel 1 annular soft pad can be set.For this reason, the flange 19 of cylindrical barrel 1 is stayed the end of syringe, this flange has an outstanding internal ring in syringe, and this internal ring has elasticity, so that be pressed into after annotating plug 2 packing into.
After syringe was used once, because no longer guaranteeing to annotate plug, socket pipe in syringe, seals, so just can not make its topping up again by any way.
For avoiding reusing this syringe really,, can also provide a device that the syringe part is damaged except preventing that with the method that punctures socket pipe inhalant liquid is external.
For this reason, in the very near place of distance end plate 22, annotating plug 2 has a cannelure 23, and this groove makes to annotate to fill in and attenuates, and user can be broken it after transfusion.In case when the break-off portion of notes plug 2 comes out to arrive the outside of syringe, just can not move remaining that part that has socket pipe 3 along the needed direction of imbibition.
The manufacture of syringe will be described below.Main is to assemble very carefully, in case puncture easily broken wall 34.
In by first embodiment shown in Figure 6, cylindrical barrel 1 is made two parts: in the place ahead of syringe, short part 16, and another long part 17, short part comprises a bottom 13 and a termination 14; Long part comprises a columniform pipe, the rear end of opening and around the flange 19 of this rear end.
Claims (8)
1, disposable syringe, comprise and hold the cylindrical barrel (1) of annotating plug (2), this notes plug has the socket pipe (3) of a hollow cylinder shape, this socket pipe has can guarantee the perisporium that seals with cylindrical barrel 1, front (31) and back (32) of sealing, this mask has and is used for this socket pipe (3) is fixed to hole (33) on the alignment pin (43) of the driving needle (4) of annotating plug (2), and this syringe is characterised in that:
There is easily broken wall (34) the sealing front (31) of-socket pipe (3);
The back of-socket pipe (32) is positioned at contact other opening (35) outside the scope of driving needle (4) and socket pipe (3) at least in addition except porose (33), this opening makes the inside of socket pipe (3) and the back chamber (12) of cylindrical barrel (1) communicate;
On the alignment pin that is used for receiving socket pipe (3) (43) of-driving needle (4) a transmission syringe needle (44) is arranged, this syringe needle punctures easy breaking cellular wall (34) when promoting to annotate the plug motion.
2, syringe according to claim 1 is characterized in that driving needle (4) has a bar (41) of alignment pin (43) being linked notes plug (2) end plates (22).
3, syringe according to claim 2, the length of bar (41) that it is characterized in that driving needle (4) is in fact greater than the thickness of socket pipe (3), so that socket pipe (3) moves between following two positions: in first position, the back of socket pipe (32) is by the plane of structure (42) of the alignment pin (43) of driving needle (4), and be the pulling force of imbibition annotating what apply beyond the Great Wall this moment; And second position, this back (32) by end plate (22), release injection this moment from syringe.
4, syringe according to claim 3, it is characterized in that, when liquid applies propelling movement power in filling in syringe by notes, transmission syringe needle (44) punctures easy breaking cellular wall (34), and the sealing of socket pipe is sealed opening (35) by end plate (22) and is guaranteed, and when when annotating plug and apply pulling force and make it be in advanced position, transmission syringe needle (44) and easy breaking cellular wall (34) segment distance of being separated by.
5, syringe according to claim 1 is characterized in that this syringe has prevention and annotates the locking device (15) that plug (2) retracts to cylindrical barrel (1) outside.
6, syringe according to claim 1 is characterized in that annotating having on the plug (2) to make and annotates the cannelure (23) that plug fractures.
7, syringe according to claim 1, it is characterized in that cylindrical barrel (1) by each other the assembling two parts (16,17) make.
8, syringe according to claim 1 is characterized in that also having stop device (18,24), as long as user is operated according to working procedure, this stop device just can stop notes plugs (2) to move fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103604 CN1029199C (en) | 1990-04-13 | 1990-04-13 | Once used hypodermic syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103604 CN1029199C (en) | 1990-04-13 | 1990-04-13 | Once used hypodermic syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055487A CN1055487A (en) | 1991-10-23 |
| CN1029199C true CN1029199C (en) | 1995-07-05 |
Family
ID=4878165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90103604 Expired - Fee Related CN1029199C (en) | 1990-04-13 | 1990-04-13 | Once used hypodermic syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029199C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002365619A1 (en) * | 2001-12-05 | 2003-06-17 | Qingfeng Wu | A self destructive single use syringe |
-
1990
- 1990-04-13 CN CN 90103604 patent/CN1029199C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055487A (en) | 1991-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |