CN102921079A - Disposable auto-disable syringe and manufacture process thereof - Google Patents
Disposable auto-disable syringe and manufacture process thereof Download PDFInfo
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- CN102921079A CN102921079A CN2012104423519A CN201210442351A CN102921079A CN 102921079 A CN102921079 A CN 102921079A CN 2012104423519 A CN2012104423519 A CN 2012104423519A CN 201210442351 A CN201210442351 A CN 201210442351A CN 102921079 A CN102921079 A CN 102921079A
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Abstract
The invention discloses a disposable auto-disable syringe which comprises a syringe tube, a push rod and a syringe needle and is characterized in that a sealing protruding rib in interference fit with the inner wall of the syringe tube is arranged on the outer edge face of a Ruhr cone head to form a liquid seal. A limit groove is arranged on the tail portion of the syringe tube close to the position of a tube opening, a limit protruding rib matched with the limit groove is arranged in the middle of the push rod, and a groove is radially arranged on the outer ring face of the limit protruding rib to form an upper locking vane and a lower locking vane respectively. A method includes assembling the syringe tube and the Ruhr cone head, placing the combination under the environment with constant temperature of 45 DEG C to 60 DEG C to heat the combination for 11h-15h, taking out and standing for 24h-28h, cooling and finalizing to achieve sealing of the sealing rib of the syringe tube and the outer edge face of the Ruhr cone head. The syringe utilizes characteristics of two materials to achieve sealing of the Ruhr cone head and the syringe tube, omits a sealing ring, improves production efficiency, prevents the push rod from being pulled out and pushed in the syringe tube after use by means of height difference of the front groove wall and the back groove wall, and ensures 'disposable' use safety.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments and processing technology thereof, relate in particular to a kind of disposable self-destruction syringe and processing technology thereof.
Background technology
For avoiding to the input of the mankind or animal or cross infection occurs when taking out medium, disposable syringe already is widely used at modern medicine as the medical apparatus and instruments of routine, namely processes as hospital refuse later using.
At present, disposable syringe commonly used is mainly by hollow barrel 101, one is installed in the push rod 102 in the hollow barrel 101, the syringe needle of deciding journey piston 103 and being positioned at push rod 102 front ends that is fitted in the syringe 101 forms, syringe needle is installed on syringe 101 front ends by Rule conehead 104, syringe 101 inner edges are provided with stopper slot 105, cooperate the location with the screens piece 106 on Rule conehead 104, for preventing the slit internal leakage of medicinal liquid between Rule conehead 104 and syringe 101, as shown in Figure 1, usually adopt the mode of sheathed O type O-ring seal 107, guaranteeing not can leakage, such as Chinese utility model patent CN2782120Y disclosed " the disposable syringe of a kind of safety self-destructing ".In addition, push rod is after injection is complete, pull back, bring in the lump syringe needle in the syringe by Rule conehead, avoid syringe needle to stab medical personnel, and for reaching disposable use, being provided with position limiting convex ring at the tail end inwall of syringe, the push rod front end is provided with the limit rib that cooperates with this position limiting structure, when push rod is pulled back, limit rib is subject to the restriction of position limiting convex ring, is difficult for being drawn out, if go out push rod by powerful hard draw, to cause the damage of push rod, thereby realize type self-destroyed, the disposable use of syringe, stop the hidden danger that secondary uses, satisfy safety, disposable requirement.
Yet still there is following several problem in said structure in actual production and using:
(1) necessary sheathed O RunddichtringO between Rule conehead and the syringe, therefore in both assembling process, can only be set on the conehead of Rule by manually filling first the O RunddichtringO at present, then again the screens piece on the conehead of Rule and the assembling of the stopper slot on the syringe be put in place.Because with pure hand assembled, packaging efficiency is lower, cost of labor is higher, more and more can not adapt to the in batches requirement of demand;
(2) owing to only realize spacing by the screens between positive stop lug boss and the limit rib between push rod and the syringe, can not fully really reach disposable self-destructing, find in the actual use procedure, have more than 50% may be after applying suitable active force, push rod is pulled out syringe, and push rod does not damage, thereby just can't satisfy " type self-destroyed ", the requirement of " disposable ", and safety descends.
Summary of the invention
The object of the invention provides a kind of disposable syringe and processing technology thereof, by the improvement of structure ﹠processes, can realize automatic assembling, and is time saving and energy saving, and improves the safety of using, and stops the possibility that secondary uses.
For achieving the above object, the technical solution used in the present invention is: disposable self-destruction syringe, comprise syringe, push rod and syringe needle, described push rod is arranged in the syringe, the push rod front end sleeve is provided with seal rubber plug, described syringe needle is installed on the syringe front end through Rule conehead, described Rule conehead is connected through position limiting structure with syringe, described Rule conehead outer edge surface is provided with seal bead, sealing convex tendon and described syringe inwall interference fit, monolateral interference fit value is between 0.15mm～0.35mm, consist of liquid sealing, described syringe adopts the duroplasts goods, and the hardness of these duroplasts goods is between 100R～135R, described Rule conehead adopts the flexible plastic goods, and the hardness of these flexible plastic goods is between 75R～95R; Described syringe afterbody is provided with limited impression near tube port position, and the rear cell wall of the corresponding nozzle side of this limited impression is higher than the front cell wall 0.10mm～0.35mm of opposite side; Described push rod middle part is provided with the retaining convex rib that cooperates with described limited impression, radially offer groove on this retaining convex rib outer ring surface, cell wall opposing bending in both sides consists of respectively upper and lower snap close blade, on the described push rod, between described retaining convex rib and push rod afterbody, be provided with radial slot.
In the technique scheme, on the conehead outer edge surface of described Rule seal bead is set, realize liquid sealing with the syringe inwall by interference fit, can adopt the plastics of two kinds of different hardness, after heating, utilize the character of expanding with heat and contract with cold of itself material, reach between monolateral magnitude of interference 0.15mm～0.35mm, in this interval, can reach good sealing on the one hand, have on the other hand the best push-and-pull push rod feel.The present invention replaces in the past sealing O type coil structures with seal bead, concerning the syringe manufacturer, assemble more simple, can pass through the automatic assembly equipment assembled syringe, enhance productivity, simultaneously, also can avoid sealing O type coil structures sealing and affected by storage temperature and the problem that causes leakage, make the syringe performance more stable.Be provided with retaining convex rib on the described push rod, outer edge surface at retaining convex rib arranges groove, and the opposing bending of both sides cell wall, also just formed the prong of class " Y " type at outer edge surface, on the both sides cell wall has consisted of, lower snap close blade, this retaining convex rib cooperates with limited impression on the syringe, realize spacing when push rod is pulled back, before utilizing limited impression, differing of rear cell wall height, make push rod when assembling, be easy to push (retaining convex rib through after during cell wall, on, lower snap close blade compresses, syringe is strutted, retaining convex rib passes through limited impression, enter in the syringe), when pulling back push rod, retaining convex rib fall in the limited impression (retaining convex rib is through front cell wall, on, lower snap close blade is compressed, but the height of rear cell wall is higher than front cell wall, on, the quantity not sufficient that lower snap close blade is compressed by front cell wall so that retaining convex rib by rear cell wall, therefore retaining convex rib is stuck on the rear cell wall, falls in the limited impression), therefore, on, lower snap close blade no longer suffers oppression, open fully, so that more forward or backward push-and-pull of push rod stops to reuse; If use excessive push-pull effort, will cause push rod to be positioned at incision and fracture, thereby realize type self-destroyed.
In the technique scheme, conehead rear end, described Rule is provided with unloads the power chamber, is provided with one between described seal rubber plug and Rule conehead and unloads the power sealing shroud, and this unloads power sealing shroud front end and unload the power cavity wall and is sealed and matched, and its side cooperates with described syringe inner wall sealing; The described power of unloading sealing shroud outer edge surface is provided with the screens projection, and described Rule conehead unloads the nearly bottom of power intracavity ring wall and is provided with the anticreep muscle that cooperates with this screens projection; The described power of unloading sealing shroud top is provided with elastic card claw, described push rod leading section is provided with the ring-shaped step that cooperates with this elastic card claw, described ring-shaped step to the distance of the umbrella shape step on described push rod top greater than top, the described power of unloading chamber to described Luer taper crown end apart from 1mm～3mm.
In the technique scheme, described push rod top is the umbrella shape step that cooperates with Luer taper head section clamping, can adopt existing techniques in realizing, is used for taking back Rule conehead, makes in the syringe needle retraction syringe.When injection closes on end, the umbrella shape step on push rod top is by behind the conehead of Rule, advance again 1mm～3mm, ring-shaped step on the push rod is by unloading the elastic card claw of power sealing shroud, seal rubber plug on the push rod just in time is butted on and unloads on the power sealing shroud at this moment, the end of pushing pin, when pulling back push rod, ring-shaped step is butted on and unloads on the power sealing shroud, apply pulling force backward, make the anticreep muscle on the screens projection disengaging Rule conehead that unloads on the power sealing shroud, just lost on the conehead of Rule like this and unloaded the power sealing shroud to its support, the position limiting structure between Rule conehead and the syringe is untied, be easy to cooperating in the Luer taper headband back stitching cylinder by umbrella shape step and Rule conehead, namely guaranteed needle retractable, prevented that syringe needle from stabbing medical personnel or patient, and by unloading the setting of power sealing shroud, the pull-back forces that medical personnel put on the push rod is less, soft handle has guaranteed pushing away to the greatest extent of syringe inner liquid medicine simultaneously, reduces the residual quantity of medicinal liquid.
In the technique scheme, described ring-shaped step is tapered to the pole face between the described umbrella shape step, is beneficial to pushing of push rod, and the elastic force claw that unloads the power sealing shroud is opened.
Further technical scheme is, the described power of unloading sealing shroud front end is provided with center plug and is positioned at the peripheral axial arranged taper support muscle of center plug, described center plug is frustum, be inserted in the described power of unloading intracavity, and and Rule conehead between form liquid sealing, described Rule conehead at corresponding described taper support muscle place is provided with slot, described taper support muscle outer edge surface is butted on the described slot inwall, make the expanded radially of Luer taper head-tail, described Luer taper head-tail outer edge surface is provided with the expansion muscle, described syringe inwall is provided with the positive stop lug boss corresponding with this expansion muscle, described expansion muscle is butted on the described positive stop lug boss, consists of the position limiting structure of described Rule conehead and syringe.Taper support muscle on the described power of the unloading sealing shroud is plugged in the slot on the conehead of Rule, cooperate with the anticreep muscle that unloads the power cavity wall by the projection of the screens on the taper support muscle, the power sealing shroud of unloading is connected in unloads the power intracavity, and strut bottom the conehead of Rule, the expansion muscle is butted on the positive stop lug boss on the syringe inwall, guarantees Rule conehead and syringe assemble stable.
In the technique scheme, described center plug outer edge surface is provided with sealed muscle, is sealed and matched between sealing muscle and the described power of the unloading cavity wall, prevents the seepage of medicinal liquid, meets syringe to the requirement of medicinal liquid leakage.
In the technique scheme, the duroplasts that described syringe adopts is polypropylene or Merlon, and the flexible plastic that described Rule conehead adopts is polyethylene.
In the technique scheme, described syringe inwall is provided with concave slideway and cannelure, be provided with limited step between described concave slideway and the cannelure, slidely connect an outer sleeve in the described concave slideway, be provided with an inner sleeve in the described cannelure, gap between described outer sleeve and the described inner sleeve consists of described limited impression, the inner edge surface of described outer sleeve is a conical surface, and corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve, consist of described rear cell wall, described inner sleeve consists of described front cell wall with respect to the end face of outer sleeve side, described inner sleeve is provided with guiding surface with respect to the other end inwall of outer sleeve, and this guiding surface is connected with described syringe inwall.
Above, consist of the forward and backward cell wall of limited impression by inner and outer sleeves, utilize the conical surface on the outer sleeve inner edge surface, when the assembling push rod, for retaining convex rib provides guiding, outer sleeve slides along the concave slideway, and retaining convex rib is pushed to the inner sleeve place, for the upper and lower snap close blade of retaining convex rib outer rim provides protection, avoid unexpected bending; And when push rod is pulled back; retaining convex rib is by inner sleeve the time; by the guiding surface on the inner sleeve; in the contraction; lower snap close blade; protect the snap close blade and be easy to pass through inner sleeve; behind retaining convex rib process inner sleeve; because outer sleeve is corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve; the internal diameter of syringe that can see the push rod process as is reduced; therefore the lower snap close blade on the retaining convex rib outer edge surface is butted on the outer sleeve end face; driving outer sleeve moves to syringe tail end open side along the concave slideway; thereby in; form the gap between the outer sleeve; consist of limited impression; in retaining convex rib falls into; in the gap between the outer sleeve; on; lower snap close blade is not subjected to the inner sleeve restriction and opens; upper snap close blade is butted on the inner sleeve end face; lower snap close blade is butted on the outer sleeve end face; and outer sleeve is after moving to the concave ways-end; be butted on the concave ways-end wall; can't deviate from syringe; therefore; after in retaining convex rib falls into limited impression, just push rod has been carried out stuck, the operation that can't push away again or draw; consist of disposable use; in case the strength that applies is excessive, push rod just can fracture, and forms self-destruction; avoid the possibility that reuses fully, improved the safety that syringe uses.
In the technique scheme, described upper and lower snap close blade ringwise or the sections shape.
For achieving the above object, the process technology scheme that the present invention adopts is: syringe and the assembling of Rule conehead, both peg graft with the position limiting structure between the conehead of Rule by syringe and cooperate, place under the isoperibol between 45 ℃～65 ℃ and heated 11 hours～15 hours, left standstill after the taking-up 24 hours～48 hours, cooling and shaping makes monolateral interference fit value between syringe and Rule conehead between 0.15mm～0.35mm, realizes the sealing of described syringe sealed muscle and described Rule conehead outer edge surface.
In the technique scheme, after described syringe and described Rule conehead are pegged graft, place in couveuse or the calorstat and heated 12 hours.
In the present invention, syringe and Rule conehead select the material of two kinds of different hardness to consist of, can adopt polypropylene or Merlon such as syringe, Rule conehead can adopt polyethylene, both are after grafting, pass through again heat tracing about 12 hours, because syringe adopts duroplasts to make, and Rule conehead adopts flexible plastic to make, both thermal deformation coefficients are different, therefore under equal heating-up temperature, the deformation coefficient of Rule conehead is higher than syringe, and after the Luer taper feverish sensation in the head was swollen, (monolateral shrink value was 0.15mm～0.35mm) for seal bead and syringe inwall formation interference fit, then shrink typing by cooling, both form liquid sealing.Compare with the connected mode that common hard card is pegged graft like this, shrink value can not reach above-mentioned data, and the size of the magnitude of interference will affect the feel of push-and-pull syringe, and the magnitude of interference is little, and push-pull effort is little, and feel is light, resistance is low, leakage; Otherwise the magnitude of interference is large, and push-pull effort is large, and feel is poor, and the resistance of pulling back of pushing pin is large.Use the present invention, can realize the effect of the little and sealing of shrink value, push rod when push-and-pull, the power on the push rod of putting between 5N～15N, the best hand feeling dynamics during for the push-and-pull push rod.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, among the present invention, syringe and Rule conehead adopt the plastic of different hardness to consist of, by heating rear cooling and shaping, both interference fit, and the realization liquid sealing is compared with structure in the past, has saved the sealing members such as O RunddichtringO, make assembling more convenient, can utilize the automation equipment direct-assembling, need not manpower intervention, thereby enhance productivity, the needs that adapt to order in enormous quantities, and health more;
2, because syringe is different at the thermal deformation coefficient under the heated condition from Rule conehead, Luer taper is easily deformable first watch, form the interference fit with the syringe sealed muscle after the flatulence of heat type, then cooling and shaping is assembled with the straight cutting under the common mode, the magnitude of interference can be controlled at less scope, realize simultaneously sealing effectiveness, resistance is little so that medical care person when pushing pin, pulls back, soft handle;
3, limited impression is set on the syringe, and front, form drop value 0.1mm～0.35mm between the rear cell wall, on the push rod upper limit convex tendon outer edge surface groove is set, in the formation, lower snap close blade, after retaining convex rib falls into limited impression, just can outwards strut, before being butted on, on the rear cell wall, all be not easy to forward or backward be broken away from limited impression, before utilizing simultaneously, the difference in height of rear cell wall makes retaining convex rib be easy to assembling and pushes, and can not be drawn out with same power, and the increasing pulling force, push rod will fracture in incision, thereby stop the possibility that syringe reuses, and realize self-destruction, guarantee syringe " disposable " safety in utilization, effectively avoided cross infection;
4, in the syringe inner and outer sleeves is set, consist of respectively the forward and backward cell wall of limited impression, by the slip of outer sleeve in the syringe slideway, and the guiding of guiding surface on the inner sleeve, to the pushing and pull out and protect of upper and lower snap close blade, avoid stuck, guarantee that the snap close blade struts when falling into limited impression, spacing accurate, reduce assembling Times quantity scrapped, reduce production costs;
5, the push rod front end is provided with and the ring-shaped step that unloads power sealing shroud top and cooperate, when push rod is pulled back, guarantee to unload the power of the unloading effect of power sealing shroud, namely remove the support to Rule conehead, be convenient to Rule conehead by in the syringe of retracting smoothly, the syringe needle that has also just guaranteed to be arranged on the conehead of Rule is regained in the syringe, avoids stabbing medical personnel or patient, improves safety in utilization;
6, owing to unload the center plug of power sealing shroud front end and unload the sealing of power cavity wall, can prevent the seepage of medicinal liquid, make syringe meet industry standard, can reduce the residual quantity of medicinal liquid simultaneously.
Description of drawings
Fig. 1 is the structural representation of syringe and Rule conehead in the background technology of the present invention;
Fig. 2 is the structural representation of the embodiment of the invention one;
Fig. 3 is the local enlarged diagram of Fig. 2;
Fig. 4 is the structural representation of syringe in the embodiment of the invention one;
Fig. 5 is the local enlarged diagram of Fig. 4;
Fig. 6 is the structural representation of push rod in the embodiment of the invention one;
Fig. 7 is the retaining convex rib structural representation in the embodiment of the invention one;
Fig. 8 is the structural representation of Rule conehead in the embodiment of the invention one;
Fig. 9 is the structural representation of the power of the unloading sealing shroud in the embodiment of the invention one;
Figure 10 is the structural representation in the embodiment of the invention two;
Figure 11 is the user mode structural representation in the embodiment of the invention two;
Figure 12 is the partial enlarged drawing of Figure 11;
Figure 13 is the syringe cylinder structure sketch map in the embodiment of the invention two;
Figure 14 is the partial enlarged drawing of Figure 13.
Wherein: 1, syringe 2, push rod; 3, syringe needle 4, seal rubber plug 5, Rule conehead; 6, seal bead 7, limited impression 8, rear cell wall 9, front cell wall 10, retaining convex rib 11, groove 12, upper snap close blade 13, lower snap close blade; 14, otch; 15, expansion muscle 16, positive stop lug boss 17, unload power chamber 18, unload power sealing shroud 19, center plug 20, taper support muscle; 21, sealed muscle 22, slot 23, screens projection 24, anticreep muscle 25, elastic card claw 26, ring-shaped step 27, umbrella shape step 28, concave slideway 29, cannelure 30, limited step; 31, outer sleeve 32, inner sleeve 33, the conical surface 34, guiding surface 101, syringe; 102, push rod 103, decide journey piston 104, Rule conehead 105, stopper slot 106, screens piece 107, O type O-ring seal.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment one: shown in Fig. 2～9, disposable self-destruction syringe, comprise syringe 1, push rod 2 and syringe needle 3, described push rod 2 is arranged in the syringe 1, and push rod 2 front end sleeves are provided with seal rubber plug 4, described syringe needle 3 is installed on syringe 1 front end through Rule conehead 5, described Rule conehead 5 and syringe 1 are connected through position limiting structure, and described Rule conehead 5 outer edge surfaces are provided with seal bead 6, sealing convex tendon 6 and described syringe 1 inwall interference fit, monolateral interference fit value is 0.18mm, consists of liquid sealing; Described syringe 1 adopts the duroplasts goods of hardness between 100R～135R to make, and such as polypropylene, described Rule conehead 5 adopts the flexible plastic goods of hardness between 75R～95R to make, such as polyethylene.Described syringe 1 afterbody is provided with limited impression 7 near tube port position, and the front cell wall 9 that the rear cell wall 8 of the corresponding nozzle side of this limited impression 7 is higher than opposite side has 0.20mm; Described push rod 2 middle parts are provided with the retaining convex rib 10 that cooperates with described limited impression 7, radially offer groove 11 on these retaining convex rib 10 outer ring surfaces, the opposing bending of both sides cell wall, be " Y " type, upper snap close blade 12 and the lower snap close blade 13 of difference looping, on the described push rod 2, between described retaining convex rib 10 and push rod 2 afterbodys, be provided with radial slot 14.
In the present embodiment, shown in Fig. 2～9, conehead 5 afterbody outer edge surfaces in described Rule are provided with expansion muscle 15, and described syringe 1 inwall is provided with positive stop lug boss 16, and both cooperate the formation position limiting structure; Conehead 5 rear ends, described Rule are provided with unloads power chamber 17, described seal rubber plug 4 and Rule conehead 5 unload and are provided with one between the power chamber 17 and unload power sealing shroud 18, this unloads power sealing shroud 18 front ends and is provided with center plug 19 and is positioned at center plug 19 peripheral axial arranged taper support muscle 20, its tail end outer edge surface cooperates with described syringe 1 inner wall sealing, described center plug 19 outer edge surfaces are provided with sealed muscle 21, be sealed and matched between sealing muscle 21 and the described power of unloading chamber 17 inwalls, the nearly bottom sides of unloading power sealing shroud 18 cooperates with described syringe 1 inner wall sealing; Described center plug 19 is inserted in the described power of the unloading chamber 17, and and Rule conehead 5 between form liquid sealing, described Rule conehead 5 at corresponding described taper support muscle 20 places is provided with slot 22, described taper support muscle 20 outer edge surfaces are butted on described slot 22 inwalls, make the 5 afterbody expanded radiallys of Rule conehead, described taper support muscle 20 is provided with screens projection 23 near the root outer edge surface, described Rule conehead 5 unloads the corresponding described expansion muscle of power chamber 17 internal ring walls 15 places, be provided with and the screens projection 23 anticreep muscle 24 that cooperate, unloading power sealing shroud 18 cooperates to assemble with the clamping of anticreep muscle 24 by screens projection 23 and fixes, thereby guaranteed that expansion muscle 15 can push against on described positive stop lug boss 16 on Rule conehead 5, form good spacingly, avoid syringe needle 3 unexpected retraction when injection is used.
Such as Fig. 6; shown in 9; the center plug 19 of the described power of unloading sealing shroud 18 is frustum; its head is provided with elastic card claw 25; described push rod 2 leading sections are provided with the ring-shaped step 26 that cooperates with this elastic card claw 25; described ring-shaped step 26 is tapered to the pole face between the described umbrella shape step 27; described ring-shaped step 26 to the distance of the umbrella shape step 27 on described push rod 2 tops greater than 17 tops, the described power of unloading chamber to conehead 5 tops, described Rule apart from 2mm; this distance is for guaranteeing that ring-shaped step 26 is by elastic card claw 25; center plug 19 ends with unload power chamber 17 inwalls and form sealing; medicinal liquid is pushed away to the greatest extent as far as possible, reduce the residual quantity of medicinal liquid.
The processing technique of described syringe is: described syringe 1 and 5 assemblings of described Rule conehead, both peg graft by position limiting structure and cooperate, placed under 45 ℃ the isoperibol heating 12 hours, left standstill after the taking-up 30 hours, cooling and shaping, make monolateral interference fit value between syringe 1 and Rule conehead 5 about 0.18mm, realize being sealed under this magnitude of interference of described syringe 1 sealed muscle and described Rule conehead 5 outer edge surfaces, medical personnel are when pushing pin, the power on the push rod 2 of putting on is in the best feel of pushing pin about 10N.
During assembling, first Rule conehead 5 is pushed into syringe 1 top, be pushed in the power of the unloading chamber 17 of Rule conehead 5 unloading power sealing shroud 18, screens projection 23 cooperates with the anticreep muscle 24 that unloads power chamber 17 inwalls, expansion muscle 15 on Rule conehead 5 struts at this moment, be butted on the positive stop lug boss 16 on syringe 1 inwall, form good spacingly, prevent stressed syringe 1 inside of pulling back when injecting liquid drug.Then cover is had the push rod 2 of seal rubber plug 4 to push syringe 1, retaining convex rib 10 is rapidly by limited impression 7, and assembling is finished.During use, injecting liquid drug is when complete, the umbrella shape step 27 on push rod 2 tops is by behind Rule conehead 5, advance again 2mm, the elastic card claw 25 of ring-shaped step 26 on the push rod 2 by unloading power sealing shroud 18, seal rubber plug 4 on the push rod 2 just in time is butted on and unloads on the power sealing shroud 18 at this moment, the end of pushing pin, when pulling back push rod 2, ring-shaped step 26 is butted on and unloads on the power sealing shroud 18, apply pulling force backward, make the anticreep muscle 24 on the screens projection 23 disengaging Rule coneheads 5 that unload on the power sealing shroud 18, just lost on Rule conehead 5 like this and unloaded power sealing shroud 18 to its support, position limiting structure between Rule conehead 5 and the syringe 1 is untied, be easy to by umbrella shape step 27 and cooperating of Rule conehead 5 Rule conehead 5 be taken back in the syringe 1, syringe needle 3 retractions have namely been guaranteed, until retaining convex rib 10 is through front cell wall 9, this moment is because upper snap close blade 12, the amount that lower snap close blade 13 is compressed by front cell wall 9 can not satisfy the needs by rear cell wall 8, therefore retaining convex rib 10 is stuck on the rear cell wall 8, fall in the limited impression 7, upper snap close blade 12 struts with lower snap close blade 13, be butted on respectively front cell wall 9, on the rear cell wall 8, so that push rod 2 can't push or pull out again, stop again to be used, if the words of using larger power to pull out by force, upper snap close blade 12, lower snap close blade 13 will damage, if push by force, then push rod 2 bears incessantly thrust, to fracture cutting 14 places, cause self-destruction.
Embodiment two is shown in Figure 10～14, disposable self-destruction syringe, in the present embodiment, its structure and embodiment one basic simlarity, difference is: described Rule conehead 5 outer edge surfaces are provided with seal bead 6, sealing convex tendon 6 and described syringe 1 inwall interference fit, monolateral interference fit value is 0.25mm, consists of liquid sealing; Described syringe 1 adopts Merlon to make, and described Rule conehead 5 adopts polyethylene to make.Its processing technique is: described syringe 1 and 5 assemblings of described Rule conehead, both peg graft by position limiting structure and cooperate, place in the couveuse between 50 ℃, heated 14 hours, left standstill after the taking-up 24 hours, cooling and shaping reaches about 0.25mm the monolateral interference fit value between syringe 1 and Rule conehead 5, realizes the sealing of described syringe 1 sealed muscle and described Rule conehead 5 outer edge surfaces.
Described upper snap close blade 12, lower snap close blade 13 is 4 sections sections shapes, described syringe 1 inwall is provided with concave slideway 28 and cannelure 29, be provided with limited step 30 between described concave slideway 28 and the cannelure 29, slidely connect an outer sleeve 31 in the described concave slideway 28, be provided with an inner sleeve 32 in the described cannelure 29, gap between described outer sleeve 31 and the described inner sleeve 32 consists of described limited impression 7, the inner edge surface of described outer sleeve 31 is a conical surface 33, and corresponding to the interior Zhou Jing of the described inner sleeve 32 sides footpath 0.3mm of interior week less than described inner sleeve 32, consist of described rear cell wall, described inner sleeve 32 consists of described front cell wall with respect to the end face of outer sleeve 31 sides, described inner sleeve 32 is provided with guiding surface 34 with respect to the other end inwall of outer sleeve 31, this guiding surface 34 is connected with described syringe 1 inwall, be convenient to retaining convex rib 10 and when retracting, pass through inner sleeve 32, avoid fractureing of snap close blade.
During assembling, when push rod 2 pushes fast, outer sleeve 31 slides along concave slideway 28, retaining convex rib 10 is pushed to inner sleeve 32 places, enter in the syringe 1 through behind the inner sleeve 32 smoothly, the cooperation of inner sleeve 32, outer sleeve 31 provides protection for the upper snap close blade 12 of retaining convex rib 10 outer rims, lower snap close blade 13, avoids unexpected bending; And when push rod 2 is pulled back; retaining convex rib 10 is by inner sleeve 32 time; by the guiding surface on the inner sleeve 32; snap close blade 12 in the contraction; lower snap close blade 13; protection snap close blade and being easy to by inner sleeve 32; behind retaining convex rib 10 process inner sleeves 32; because outer sleeve 31 is corresponding to the interior Zhou Jing of the described inner sleeve 32 sides interior Zhou Jing less than described inner sleeve 32; the internal diameter of syringe 1 that can see push rod 2 processes as is reduced; therefore the lower snap close blade 13 on retaining convex rib 10 outer edge surfaces is butted on outer sleeve 31 end faces; 1 tail end open side moves along concave slideway 28 to syringe to drive outer sleeve 31; thereby inner sleeve 32; form the gap between the outer sleeve 31; consist of limited impression 7; retaining convex rib 10 falls into inner sleeve 32; in the gap between the outer sleeve 31; upper snap close blade 12 is butted on inner sleeve 32 end faces; lower snap close blade 13 is butted on outer sleeve 31 end faces; and outer sleeve 31 is after moving to concave slideway 28 ends; be butted on concave slideway 28 end wall; can't deviate from syringe 1; therefore; when retaining convex rib 10 fall into limited impression 7 interior after, just push rod 2 has been carried out stuck, the operation that push rod 2 can't push away or draw.
Claims (10)
1. disposable self-destruction syringe, comprise syringe, push rod and syringe needle, described push rod is arranged in the syringe, the push rod front end sleeve is provided with seal rubber plug, described syringe needle is installed on the syringe front end through Rule conehead, described Rule conehead is connected through position limiting structure with syringe, it is characterized in that: described Rule conehead outer edge surface is provided with seal bead, sealing convex tendon and described syringe inwall interference fit, monolateral interference fit value consist of liquid sealing between 0.15mm～0.35mm, described syringe adopts the duroplasts goods, the hardness of these duroplasts goods is between 100R～135R, and described Rule conehead adopts the flexible plastic goods, and the hardness of these flexible plastic goods is between 75R～95R; Described syringe afterbody is provided with limited impression near tube port position, and the rear cell wall of the corresponding nozzle side of this limited impression is higher than the front cell wall 0.1mm～0.35mm of opposite side; Described push rod middle part is provided with the retaining convex rib that cooperates with described limited impression, radially offer groove on this retaining convex rib outer ring surface, cell wall opposing bending in both sides consists of respectively upper and lower snap close blade, on the described push rod, between described retaining convex rib and push rod afterbody, be provided with radial slot.
2. disposable self-destruction syringe according to claim 1, it is characterized in that: conehead rear end, described Rule is provided with unloads the power chamber, be provided with one between described seal rubber plug and Rule conehead and unload the power sealing shroud, this unloads power sealing shroud front end and unloads the power cavity wall and is sealed and matched, and its side cooperates with described syringe inner wall sealing; The described power of unloading sealing shroud outer edge surface is provided with the screens projection, and described Rule conehead unloads the nearly bottom of power intracavity ring wall and is provided with the anticreep muscle that cooperates with this screens projection; The described power of unloading sealing shroud top is provided with elastic card claw, described push rod leading section is provided with the ring-shaped step that cooperates with this elastic card claw, described ring-shaped step to the distance of the umbrella shape step on described push rod top greater than top, the described power of unloading chamber to described Luer taper crown end apart from 1mm～3mm.
3. disposable self-destruction syringe according to claim 2 is characterized in that: described ring-shaped step is tapered to the pole face between the described umbrella shape step.
4. disposable self-destruction syringe according to claim 2, it is characterized in that: the described power of unloading sealing shroud front end is provided with center plug and is positioned at the peripheral axial arranged taper support muscle of center plug, described center plug is frustum, be inserted in the described power of unloading intracavity, and and Rule conehead between form liquid sealing, described Rule conehead at corresponding described taper support muscle place is provided with slot, described taper support muscle outer edge surface is butted on the described slot inwall, make the expanded radially of Luer taper head-tail, described Luer taper head-tail outer edge surface is provided with the expansion muscle, described syringe inwall is provided with the positive stop lug boss corresponding with this expansion muscle, described expansion muscle is butted on the described positive stop lug boss, consists of the position limiting structure of described Rule conehead and syringe.
5. according to right 4 described disposable self-destruction syringes, it is characterized in that: described center plug outer edge surface is provided with sealed muscle, is sealed and matched between sealing muscle and the described power of the unloading cavity wall.
6. disposable self-destruction syringe according to claim 1 is characterized in that: the duroplasts that described syringe adopts is polypropylene or Merlon, and the flexible plastic that described Rule conehead adopts is polyethylene.
7. disposable self-destruction syringe according to claim 1, it is characterized in that: described syringe inwall is provided with concave slideway and cannelure, be provided with limited step between described concave slideway and the cannelure, slidely connect an outer sleeve in the described concave slideway, be provided with an inner sleeve in the described cannelure, gap between described outer sleeve and the described inner sleeve consists of described limited impression, the inner edge surface of described outer sleeve is a conical surface, and corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve, consist of described rear cell wall, described inner sleeve consists of described front cell wall with respect to the end face of outer sleeve side, described inner sleeve is provided with guiding surface with respect to the other end inwall of outer sleeve, and this guiding surface is connected with described syringe inwall.
8. it is characterized in that according to claim 1 or 7 described disposable self-destruction syringes: described upper and lower snap close blade ringwise or the sections shape.
9. the processing technology of disposable syringe according to claim 1, it is characterized in that: syringe and the assembling of Rule conehead, both peg graft with the position limiting structure between the conehead of Rule by syringe and cooperate, place under the isoperibol between 45 ℃～65 ℃ and heated 11 hours～15 hours, left standstill after the taking-up 24 hours～48 hours, cooling and shaping, make monolateral interference fit value between syringe and Rule conehead between 0.15mm～0.35mm, realize the sealing of described syringe sealed muscle and described Rule conehead outer edge surface.
10. the processing technology of disposable syringe according to claim 9 is characterized in that: after described syringe and described Rule conehead are pegged graft, place in couveuse or the calorstat and heated 12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104423519A CN102921079A (en) | 2012-11-08 | 2012-11-08 | Disposable auto-disable syringe and manufacture process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104423519A CN102921079A (en) | 2012-11-08 | 2012-11-08 | Disposable auto-disable syringe and manufacture process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102921079A true CN102921079A (en) | 2013-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104423519A Pending CN102921079A (en) | 2012-11-08 | 2012-11-08 | Disposable auto-disable syringe and manufacture process thereof |
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| Country | Link |
|---|---|
| CN (1) | CN102921079A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505780A (en) * | 2013-10-08 | 2014-01-15 | 苏州市雅思精密模具有限公司 | Non-residue puncture-prevention injection syringe |
| CN116278004A (en) * | 2023-04-21 | 2023-06-23 | 山东淄博民康药业包装有限公司 | Automatic needle inserting equipment and needle cylinder needle inserting method for needle cylinder of prefilled syringe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790822A (en) * | 1987-12-11 | 1988-12-13 | Haining Michael L | Retractable hypodermic safety syringe |
| CN102430175A (en) * | 2011-09-01 | 2012-05-02 | 严慈 | Injector |
| CN202982797U (en) * | 2012-11-08 | 2013-06-12 | 苏州市雅思精密模具有限公司 | Disposable self-destruction syringe |
-
2012
- 2012-11-08 CN CN2012104423519A patent/CN102921079A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790822A (en) * | 1987-12-11 | 1988-12-13 | Haining Michael L | Retractable hypodermic safety syringe |
| CN102430175A (en) * | 2011-09-01 | 2012-05-02 | 严慈 | Injector |
| CN202982797U (en) * | 2012-11-08 | 2013-06-12 | 苏州市雅思精密模具有限公司 | Disposable self-destruction syringe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505780A (en) * | 2013-10-08 | 2014-01-15 | 苏州市雅思精密模具有限公司 | Non-residue puncture-prevention injection syringe |
| CN116278004A (en) * | 2023-04-21 | 2023-06-23 | 山东淄博民康药业包装有限公司 | Automatic needle inserting equipment and needle cylinder needle inserting method for needle cylinder of prefilled syringe |
| CN116278004B (en) * | 2023-04-21 | 2023-11-03 | 山东淄博民康药业包装有限公司 | Automatic needle inserting equipment and needle cylinder needle inserting method for needle cylinder of prefilled syringe |
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Application publication date: 20130213 |