CN1465409A - Automatic unlocking safety self-destroyed syringe - Google Patents
Automatic unlocking safety self-destroyed syringe Download PDFInfo
- Publication number
- CN1465409A CN1465409A CNA021406111A CN02140611A CN1465409A CN 1465409 A CN1465409 A CN 1465409A CN A021406111 A CNA021406111 A CN A021406111A CN 02140611 A CN02140611 A CN 02140611A CN 1465409 A CN1465409 A CN 1465409A
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- syringe
- push rod
- conehead
- needle
- disposable
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Abstract
The present invention discloses an automatic unlocking self-destructive syringe. Said syringe is formed from syringe portion, needle portion, piston and push bar. Said syrings also includes a locking ring, said locking ring is placed on the front end of the described syringe portion by means of a matching mechanism which can be disconnected, and said matching mechanism is formed locking jaw placed on the syringe portion and flange placed on the locking ring, said locking jaw and said flange can be disconnected. Besides said disposable syringe also includes a puncture body, and the front end of the piston also can be equipped with a thin-weak poption, and the tip end of cone body of said puncture body is correspondent to the position of the thin-weak portion.
Description
Technical field
The present invention relates to a kind of injector for medical purpose, relate more specifically to a kind of disposable safety self-destructing syringe.
Background technology
Widely used disposable sterilized injector in the current domestic and foreign hospitals is said the disposable characteristics that do not have from serviceability.Owing to use the back syringe needle not damage, only need syringe is adjusted a little just and can be reused, make so-called disposable use become and can't realize.Even and after use, be about to syringe and abandon, stretch out at the outside syringe needle of syringe and still have the skin that may scratch other people, may from what cause cross infection.
In view of this point, existing people develops a kind of disposable self-destruction safety syringe, and the number of patent application of this syringe is 00205827.8, and this syringe is made up of syringe, needle holder, rubber piston and push rod.Wherein the syringe front end has cylindrical hole, and needle holder is packed in the syringe cylindrical hole slidably.One groove is arranged on the inwall of syringe front end, in this groove, be provided with a sealing ring, between needle holder outer rim and syringe front inner wall, form sealing thus.The needle holder rear end is provided with the puncture cone of a band handle, and the rear end face of this puncture cone is with respect to the syringe axis angle that tilts.Be formed with conehead folder at the front end of push rod, the structure of this conehead folder make its can with puncture cone wedging and being enclosed within the rubber piston mutually, rubber piston front end face center has a weak area that the puncture cone is passed.
By this structure, pull back push rod during use earlier to extract medicinal liquid, because the effect syringe needle of sealing ring can not produce slip owing to pressure changes, promote push rod when then injecting forward to a certain degree the time, the puncture cone pierces through the weak area of rubber piston and wedges in the conehead folder of push rod, the push rod of pulling back after injection finishes can be drawn in needle holder in the syringe together with syringe needle, because the rear end face and the syringe axis of puncture cone have an inclination angle, cause needle holder to be drawn in retrodeviating from syringe axis (puncture cone and needle holder are one-body molded), thereby make syringe needle be close to the syringe bottom interior wall and can not slide to the syringe outside, there is not the probability of injury thus, and disposable use is achieved.
But this structure is also being deposited this certain defective.If the tension that cooperates of needle holder and syringe part may cause after injection finishes, syringe needle part and syringe part can't be thrown off, if perhaps needle holder is loose with cooperating of syringe part, then the phenomenon that nature gets loose may take place.It in the batch process of this syringe the qualification rate that be difficult to guarantee one of percentage hundred, and can not be by check pinpoint the problems (this defective have only syringe is carried out destructive test just can find), in case defective exists, just can come out when only using in hospital, there is hidden danger in such product quality.
In addition, in being 02237021 utility model application, application number disclosed a kind of re-use preventing once-used syringe, in this disposable syringe, syringe part and syringe needle partly are fixed together by a kind of locking device, after using, logical to make the locking device release by hand, then syringe needle partly could be regained.This makes medical personnel need extra operating procedure, has increased inconvenience thus.
Summary of the invention
One object of the present invention is to provide a kind of like this disposable syringe, and this disposable syringe need not manual unlocking, and syringe needle part and syringe part can be finished release automatically after injection finishes, can improve medical personnel's work efficiency thus.
For addressing the above problem, the invention provides a kind of disposable syringe, this syringe comprises a syringe part, this syringe part has a junction; One syringe needle part, this syringe needle part is made up of needle stand and entry needle; One push rod, push rod is positioned at syringe part; One piston, piston are arranged in the syringe part and are positioned at the front end of push rod; Wherein, this syringe also comprises a retaining ring, and this retaining ring is arranged on the front end of described syringe part by a kind of fit structure of throwing off.
In addition, fit structure is to be made of the flange that is arranged on the locking jaw on the syringe part and be arranged on the retaining ring, and locking jaw and flange can be thrown off.
In addition, this a kind of property syringe also can comprise a puncture body, and piston nose can be provided with a vulnerable area, and the cone of puncture body is most advanced and sophisticated corresponding with the position of vulnerable area.In piston, can be provided with a conehead folder that can match with cone.A sealing ring can be set between puncture body and syringe part.And the centrage of the cone of puncture body front end is with respect to angle of centrage inclination of syringe part.
Therefore, be, need not manual unlocking,, retaining ring can be thrown off along with the action of pushing ahead of push rod according to the advantage of disposable syringe of the present invention.
The accompanying drawing summary
Fig. 1 is the structural representation of automatic unlocking safety self-destructing syringe of the present invention;
Figure 1A is the partial enlarged drawing of Fig. 1;
Fig. 2 is the sketch map of automatic unlocking safety self-destructing syringe of the present invention after injection finishes;
Fig. 2 A is the partial enlarged drawing of Fig. 2;
Fig. 3 is an automatic unlocking safety self-destructing syringe of the present invention to finish and thereby the push rod post-tensioning makes sketch map in the syringe needle withdrawal syringe in injection;
Fig. 4 is that automatic unlocking safety self-destructing syringe of the present invention finishes the sketch map that rear push-rod is fractureed in injection;
Fig. 5 is the zoomed-in view of the puncture body of automatic unlocking safety self-destructing syringe of the present invention;
Fig. 6 is the enlarged diagram of the retaining ring of automatic unlocking safety self-destructing syringe of the present invention;
Fig. 7 A is the structural representation of the push rod front end conehead folder of automatic unlocking safety self-destructing syringe of the present invention, and wherein the hole on the conehead folder is the groove shape;
Fig. 7 B is the structural representation that the push rod front end conehead of automatic unlocking safety self-destructing syringe of the present invention presss from both sides another embodiment, and wherein the hole on the conehead folder is circular;
Fig. 8 A-8C is a kind of sketch map that keeper is installed;
Fig. 9 A and Fig. 9 B are the another kind of sketch map that keeper is installed;
Figure 10 A-10C installs the sketch map of keeper for another;
Figure 11 is the enlarged diagram with piston of weak area;
Figure 12 A is the sketch map that push rod and conehead folder are in mated condition
Figure 12 B is the sketch map that push rod and conehead folder are in disengaged condition;
Figure 13 A shows in detail several structures between push rod and the conehead folder to Figure 13 C;
Figure 14 is the sketch map of another embodiment of locating clamp plate of automatic unlocking safety self-destructing syringe of the present invention;
Figure 15 is the structural representation of another embodiment of automatic unlocking safety self-destructing syringe of the present invention, and different with previous embodiment is that puncture body is arranged on the push rod.
The specific embodiment
Below, with reference to the accompanying drawings embodiments of the invention are elaborated.Be pointed out that in above these accompanying drawings, identical part is represented with identical label.
Fig. 1 shows the embodiment according to disposable syringe of the present invention, and wherein syringe comprises: a syringe part 11, and this syringe part 11 has a junction; One syringe needle part 2, this syringe needle part 2 is made up of needle stand and entry needle; One push rod 3, push rod 3 is positioned at syringe part 11; One piston 4, piston 4 are arranged in the syringe part 11 and are positioned at the front end of push rod 3.Wherein, this syringe also comprises a retaining ring 5, and this retaining ring 5 is arranged on the front end of described syringe part 11 by a kind of fit structure of throwing off.
Figure 1A and Fig. 2 A show in detail a kind of fit structure between the retaining ring 5.The connecting portion place of syringe part 11 is provided with some locking jaws 6, and retaining ring 5 be provided with one can with the flange 51 of locking jaw 6 engagement.When the flange 51 of retaining ring 5 is engaged on the locking jaw 6, shown in Figure 1A, locking jaw 6 can be slightly to internal strain, make the end of locking jaw 6 nestle up a step (step shown in the figure is positioned on the puncture body 7) that is located on syringe needle part 2 or the puncture body 7, thereby prevent the 2 inside indentations of syringe needle part.And when the flange 51 of retaining ring 5 when locking jaw 6 is thrown off, locking jaw 6 unclamps with syringe needle part 2 or puncture body 7, and syringe needle part 2 can freely be retracted in the syringe part 1.In use, push rod 3 is pushed ahead, and the thrust of push rod 3 throws off retaining ring 5 and locking jaw 6 by the transmission of syringe needle part 2 or puncture body 7, syringe needle part 2 is unclamped, thereby realized the function of automatic unlocking.
In addition, in the disposable syringe shown in Fig. 1, also be provided with a puncture body 7.The centre of puncture body 7 is provided with can be by the through hole of injection, the one end is provided with one and has most advanced and sophisticated cone, and the other end links to each other with needle stand, and wherein the connected mode of puncture body 7 and needle stand can adopt threaded engagement or be clasped, even both can be made of one.This most advanced and sophisticated position is corresponding with the vulnerable area 41 on being arranged on piston 4, thereby makes it can puncture piston 4.Figure 11 shows in detail a kind of set-up mode of vulnerable area 41 of piston 4.Be provided with a conehead folder 8 in piston 4 inside, this conehead folder 8 can with push rod 3 integrally moulded forming.After cone punctured the vulnerable area 41 of piston 4, cone can be sandwiched in the conehead folder 8, thereby syringe needle part 2 can together be moved along with push rod 3.The shape of conehead folder 8 promptly can be (referring to Fig. 7 A) of flute profile, also can be (referring to Fig. 7 B) of circle hole shape.What need particularly point out is, as shown in Figure 5, become a α angle between cone axis and syringe part 1 axis, make the syringe needle off-axis in the time of can making needle retractable like this in syringe and press close to needle cylinder wall, thereby guaranteed that needle point can not stretch out outside the tube problem of having avoided needle point to hurt sb.'s feelings thus again.
In order to prevent that injection from leaking, and shown in Fig. 2 A, is provided with a sealing ring 9 between the connecting portion of puncture body 7 and syringe part 1.
Below, will sketch the use of the syringe of one embodiment of the invention.Before use, make locking jaw 6 on the connecting portion of syringe part 1 press step on the puncture body 7 on the retaining ring 5.Shown in Figure 1A, thus syringe needle part 2 move axially restrained, thereby can be in the retraction syringe part 1 because being subjected to external force at syringe needle before release.With push rod 3 pumpbacks, after the medicinal liquid extraction finishes, promote push rod 3 forward and implement injection, when push rod 3 is pushed to certain depth (when injection closes to an end), puncture body 7 punctures the vulnerable area 41 of piston 4 and is engaged in the conehead folder 8, further promote push rod 3, puncture body 7 will make retaining ring 5 move down, at this moment, and the constraint of the flange 51 stressed disengagement locking jaws 6 of retaining ring 5 and realize release.The injection finish after with push rod 3 pumpbacks, because the cone of the puncture body 7 of needle holder rear end is stayed in the conehead folder 8, syringe needle part 2 will be by pumpback in syringe part 1, broken then push rod 3, because the axis of the relative syringe part 1 of centrage of cone has an inclination angle, thereby syringe needle part 2 is tilted in syringe part 1 naturally, and needle tip lean against on the step surface of syringe front end.So just, finished the use of the syringe of one embodiment of the invention.
Perhaps, push rod 3 is two individual components with conehead folder 8, installs by suitable fit structure between them.Push rod 3 before and after the push rod 3 that Figure 12 and Figure 13 show syringe of the present invention respectively fractures and conehead press from both sides the annexation between 8.In the present embodiment, push rod 3 and conehead folder 8 is connected to cooperatively interact by recess 21 and prominent joint 20 and realizes.As shown in figure 12, when the tail end of conehead folder 8 withstands the pumpback baffle ring 32 of back end of syringe, the part of push rod below 3 that comprises conehead folder 8, piston 4 and syringe needle part 2 can't continue to move up, when external force during greater than the adhesion of locking mechanism, recess 21 and prominent joint 20 be (as shown in figure 13) separately, thereby push rod 3 can be removed.
Three kinds of embodiment of locking mechanism between the folder 8 of push rod 3 and conehead shown in Figure 13 A, 13B, the 13C.In Figure 13 A, the prominent joint 20 between push rod 3 and the conehead folder 8 is spheric; In Figure 13 B, the prominent joint 20 between push rod 3 and the conehead folder 8 is conical; In Figure 13 C, the prominent joint 20 between push rod 3 and the conehead folder 8 is truncated cone-shaped.
In order to determine the relative position of push rod 3 and syringe part 1 when mounted, can keeper be installed in the afterbody design one of push rod 3.In Figure 14, keeper be installed be one from the outstanding screening glass 101 of push rod 3 sidepieces, during installation, only need that push rod 3 is pushed into screening glass 101 and abut against the syringe afterbody and get final product.In use, screening glass 101 is folded to opposite side, has a draw-in groove on this side, the end of screening glass 101 can be snapped in the draw-in groove, push rod 3 just can enter syringe part 1 fully and implement to have injected.
The structure that keeper is installed can also be for arriving those structures shown in Figure 10 as Fig. 8.
Fig. 8 A is to the activity template 102 of the keeper shown in the 8C for being integrally molded on a side of push rod 3 bar portions, and one side of this activity template 102 links to each other with push rod 3, and the length of this activity template 102 should be enough to make it to protrude in outside the syringe part 1.In assembling process, push rod 3 is inserted in the syringe part 1, when the activity template of digging backward 102 is horizontal under the effect of syringe part 1 afterbody, i.e. expression is in place.On push rod 3 another sides, a block can be set, in case activity template 102 excessively upwarps.
Fig. 9 A shows the another kind of keeper of installing to 9B, and this keeper also is to be integrally moulded on the side of push rod 3 bar portions.This installation keeper has horizontally extending elongate member 103, and this elongate member 103 protrudes in outside the syringe part 1, and when assembling push rod 3, only needing can according to these elongate member 103 positioning instants.And when syringe used, elongate member 103 (shown in the figure is a kind of form of upwards turning up) was up or down turned up, and embedded in the bayonet socket of top or bottom setting, thereby push rod 3 can be advanced in syringe swimmingly.Figure 10 A has just replaced bayonet socket with draw-in groove to similar to shown in Fig. 9 B of the installation keeper shown in Figure 10 C and Fig. 9 A.Certainly, keeper is installed is not limited only to three kinds of above-mentioned structures, also can make other some variations this.
Figure 15 shows another embodiment of automatic unlocking safety self-destructing syringe of the present invention, different with previous embodiment is that puncture body 7 is arranged on the push rod 3, and be positioned at piston 4, can make puncture body 7 a secure fit locking hole wherein then be arranged on syringe needle part 2 tail ends.Like this puncture body 7 can from after puncture piston 4 forward, such effect of playing is identical with last embodiment.
It should be understood that in sum just the exemplary description that the present invention is made and be not exhaustive description, under the prerequisite that does not break away from spirit of the present invention, can make amendment and equivalent substitution invention.For example the flange 51 on the retaining ring 5 can be bulge loop or other similar structures (as barb); conehead presss from both sides 8 front portions and can be made into flute profile or circular; locating clamp plate and lock slots can also be other the suitable structures outside the foregoing description, and all these variations all should fall within the scope of protection of the present invention.
Claims (10)
1. disposable syringe, this syringe comprises:
One syringe part, described syringe part has a junction;
One syringe needle part, described syringe needle part is made up of needle stand and needle tubing;
One push rod, described push rod is positioned at described syringe part; And
One piston, described piston is arranged in the described syringe part, and is positioned at the front end of push rod;
It is characterized in that described syringe also comprises a retaining ring, described retaining ring is arranged on the front end of described syringe part by a kind of fit structure of throwing off.
2. disposable syringe as claimed in claim 1 is characterized in that, described fit structure is made of the flange that is arranged on the locking jaw on the syringe part and be arranged on the retaining ring, and described locking jaw and described protruding circle can be thrown off.
3. disposable syringe as claimed in claim 1, it is characterized in that, described syringe also comprises a puncture body, described puncture body is arranged on the rear end of syringe needle part or the front end of described push rod, and the front end of described piston is provided with a vulnerable area, and the position of described puncture body is corresponding with described vulnerable area.
4. disposable syringe as claimed in claim 3 is characterized in that, is provided with a conehead folder that matches with described puncture body front end cone in the described vulnerable area.
5. disposable syringe as claimed in claim 3 is characterized in that, the centrage of the cone of described puncture body front end is with respect to angle of centrage inclination of syringe part.
6. disposable syringe as claimed in claim 1 is characterized in that, described syringe also comprises a sealing ring that is used to prevent that the liquid in the syringe part from spilling.
7. disposable syringe as claimed in claim 2 is characterized in that, described push rod and described conehead folder are integrally moulded, and are a weakness zone that can fracture by hand between described push rod and the described conehead folder.
8. disposable syringe as claimed in claim 1 is characterized in that, described push rod and described conehead folder are independent molded, are provided with detachable cooperation between them.
9. disposable syringe as claimed in claim 1 is characterized in that, described push rod afterbody is provided with the installation keeper.
10. disposable syringe as claimed in claim 9 is characterized in that, described installation keeper can be made of a kind of in the following array structure: an activity template that is arranged on push rod portion one side, can radially rotates around described push rod; Protrude in an elongate member and a draw-in groove or bayonet socket outside the syringe part; Be arranged on the described push rod and protrude in the screening glass outside the syringe part and be used to embed the groove of screening glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021406111A CN1465409A (en) | 2002-07-05 | 2002-07-05 | Automatic unlocking safety self-destroyed syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021406111A CN1465409A (en) | 2002-07-05 | 2002-07-05 | Automatic unlocking safety self-destroyed syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1465409A true CN1465409A (en) | 2004-01-07 |
Family
ID=34147627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021406111A Pending CN1465409A (en) | 2002-07-05 | 2002-07-05 | Automatic unlocking safety self-destroyed syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1465409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065324A1 (en) * | 2005-12-10 | 2007-06-14 | Shandong Weigao Group Medical Polymer Co., Ltd | A disposable safety syringe |
-
2002
- 2002-07-05 CN CNA021406111A patent/CN1465409A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065324A1 (en) * | 2005-12-10 | 2007-06-14 | Shandong Weigao Group Medical Polymer Co., Ltd | A disposable safety syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |