CN2174223Y - Safety needle cover for syringe - Google Patents

Abstract

The utility model relates to a safety needle cover for syringe, which can be used for sealing the needle portion of the syringe. The utility model comprises a hollow cylindrical tube whose pipe diameter is much larger than the orifice diameter of the needle, and thus the syringe tube and the needle sleeve can be jointed conveniently. The utility model comprises a ring flange which is firmly attached on the outer edge of central position of the needle sleeve, the diameter of the ring flange is big enough to cover and protect the fingers holding the needle sleeve, and thus the fingers are prevent from being punctured and stuck by the needle when then syringe tube and the needle sleeve are engaged.

Description

Safety needle cover for syringe

This utility model relates to injection tube safety needle guard, mainly is to be provided with cyclic flange on needle guard.Particularly the size of this flange is subjected to pinking of entry needle on the syringe even as big as the finger that prevents to hold needle guard, especially when needle guard is entangled entry needle.

The function of syringe is to be used for medicine is injected human body, but it also is that a kind of virus transmits media simultaneously, particularly the disease that is infected by defeated change-blood liquid process, for example hepatitis.Therefore, in order to avoid to cause disease propagation as far as possible, developed a kind of jettisonable injection tube safety needle guard made from plastic material because of syringe discarded or that infected is used again.

Yet in order smoothly medicine to be injected human body, entry needle must point and hard, normally is made of metal, and after doctor or nurse's injection finish, needle guard can be recovered entry needle.From the angle that blood-transmitted infects, but may be when returning the contact pin cover owing to accidentally syringe needle being thrust human body and directly contacting with blood, this is breakneck.For the staff who guarantees to handle discarded syringe avoids the unexpected injury that causes because of sharp pinhead, injection tube need have needle guard, and needle guard can cover the tip portion of pin fully at least.

These are injected with syringe, then needle guard is recovered the worker of syringe, such as doctor and nurse, be the danger that may run in the syringe needle thorn that goes out of use, main cause is that the needle guard caliber is very narrow, accidentally, just might be because of when needle guard is recovered original position, slight crooked when syringe engages with needle guard and stab finger.This accident brings great danger may for doctor, nurse, particularly runs into this infectious disease that may be fatal of AIDS.

What is more, traditional syringe cylinder, and the degree of agreement between syringe and the needle guard is not fine, and therefore when moving them, needle guard probably gets loose and allows outside syringe needle is exposed to from syringe, and hurts healthcare givers or cleanup crew.

So, with the operating syringe people of routine work for those, for preventing unpredictable needle sting, the higher injection tube needle guard of a kind of safety is urgent needs.

The main purpose of this utility model is to provide a kind of injection tube safety needle guard.This needle guard; except the size that requires needle guard side flange enough big; help to protect the finger of holding needle guard; avoid outside the needle sting, simultaneously, needle guard also is designed to have the caliber of broad; the user of military order syringe; be easier to needle guard is inserted in syringe cylinder, though have low-angle crooked, also unlikely causing any harm.

Another purpose of the present utility model provides can lock sealing, and the needle guard that is difficult for getting loose is avoided outside the syringe needle of syringe is exposed to, and prestige is assisted the life security of discarded syringe treatment people.

In order to realize above-mentioned purpose, this utility model provides a kind of improved injection tube safety needle guard, so that entangle entry needle effectively.This needle guard comprises the cylindrical tube of a hollow, and its caliber is convenient to the joint of syringe and needle guard much larger than the entry needle bore; A collar flange; be fixed on the outer rim on the needle guard middle position; and its diameter is enough to effectively cover and protects the finger of holding needle guard to avoid being subjected to entry needle when grafting syringe and needle guard stabs; screw thread in syringe and the sleeve can make needle guard screw with syringe and combine; prevent that needle guard from getting loose from syringe, cause unpredictable contingency.

The injection tube safety needle guard that this utility model provides has enough big side flange, and needle guard also has the caliber of broad; not only can protect finger; avoid syringe needle and pink, and can more easily needle guard be inserted in syringe cylinder, overcome the existing shortcoming of prior art syringe effectively.

Below in conjunction with accompanying drawing, by description, structure of the present utility model and operation are described to embodiment, in the accompanying drawing:

Fig. 1 is the perspective view of prior art injection tube and needle guard;

Fig. 2 is the separate perspective view of this utility model first embodiment safety needle guard and injection tube;

Fig. 3 is the perspective view that this utility model first embodiment safety needle guard and injection tube engage;

Fig. 4 is this utility model second embodiment safety needle guard and the isolating perspective view of injection tube;

Fig. 5 is this utility model the 3rd embodiment safety needle guard and the isolating perspective view of injection tube;

Fig. 6 is the perspective view of another kind of injection tube and needle guard in the prior art, and its injection tube diameter is compared to Figure 1 bigger;

Fig. 7 is the separate perspective view of this utility model the 4th embodiment safety needle guard and injection tube;

Fig. 8 is the perspective view that this utility model the 4th embodiment safety needle guard and injection tube engage;

Fig. 9 is the assembled view of Fig. 8, the side sectional view when expression is injected.

Fig. 2 and Fig. 3 are first embodiment of the present utility model, and 10 is syringe cylinder among the figure, and 30 is safe needle guard.The molectron of syringe cylinder comprises a hollow circuit cylinder pipe shaft 12, and front end is an entry needle 14, and its tip is 16.The binding of pin and tube is to be that the outthrust 17 that extends outward of substrate is realized by one with tube front end center 19.The 18th, injection putter, it can freely move forward and backward in the hollow circuit cylinder tube, utilizes the outside power that applies with the medicament that is loaded in the pipe, pushes entry needle, and injecting liquid drug is gone into human body.The similar of this syringe cylinder is in traditional pattern.

As for safety needle guard 30, be a hollow circuit cylinder or long tube.Designed caliber 32 broads are so that in order to entangle entry needle 14.Position in the central is equipped with a collar flange 34 that is slightly larger than injection tube safety needle guard diameter simultaneously.The radius size of this collar flange 34 is enough to screen the finger 50 of holding needle guard 30.

Yet in Fig. 1, the syringe cylinder 10 of prior art ' and needle guard 30 ' compare with injection tube safety needle guard among Fig. 2, though the former has similar device, as entry needle 14 ' and extension outthrust 17 ', the mode cross section of its needle guard is quite narrow.

In Fig. 2 and Fig. 3, as can be seen, needle guard 30 closely engages with syringe 10 and capping entry needle 14 for convenience, and leading edge substrate 19 places at syringe 10 are provided with female thread 22, around outthrust 17, form a cylindrical crinoline 20.

For realizing needle guard 30 and syringe 10 intimate engagement, correspond to the leading edge female thread 22 of syringe 10, on needle guard, be furnished with a slice thin plate 40, its periphery is symmetrical circular arc and straight line.Thin plate 40 is screwed in syringe crinoline 20, and mesh, to realize sealing with female thread stricture of vagina 22 tunnel.

Fig. 4 is second embodiment of the present utility model.All labels are similar to Fig. 3, but for for the purpose of the difference, add before each label " 2 ".The difference of present embodiment maximum is the screw thread 224 of syringe 210 front ends, and this screw thread is engraved on the outer rim of syringe 210.Therefore needle guard mouth 230 will further strengthen, and no longer needs the thin plate 40 among Fig. 3, the substitute is 236 processing of one group of female thread in needle guard mouth 230.Be provided with an injection putter that can in syringe, freely move forward and backward 218 in this example equally.

Fig. 5 is the 3rd embodiment of the present utility model.All labels are similar to Fig. 3, but for for the purpose of the difference, add before each label " 3 ".This embodiment does not have the external screw thread 224 of syringe front end and the corresponding female thread 236 of needle guard mouth 230 with maximum different being in it of Fig. 4.But must particularly point out, safe herein needle guard 330 is made by the elastic resin material.When needle guard mouth 332 is inserted in syringe 312 leading edge substrates 319 distal portion, because restored concerning deformation characteristic that resin itself has and the stiction that juxtaposition metamorphose produced between the surface make needle guard and syringe to be bonded together securely.This utility model has collar flange 334 and the injection putter 318 on the safe needle guard middle position equally.

Fig. 6 expresses another kind of traditional type syringe cylinder 10 ", this syringe cylinder has bigger caliber, in addition, and the marginal position that entry needle 14 " is contained in syringe front end 19 ", main purpose is to be convenient to injection operation.But the shortcoming that equally also has the prior art syringe cylinder, promptly needle guard 30, and " caliber is too narrow, and is careless slightly, and needle guard 30 " when recovering syringe, is very easily being caused the injury to the injection operation personnel.

The solution of the problems referred to above, as shown in Figure 7 and Figure 8.In the 4th embodiment, syringe cylinder 410 comprises a hollow cylindrical tube 412 and injection putter 418, and entry needle 414 is to link syringe by outthrust 417 and a pedestal 425 of extending outward of 419 at the bottom of the syringe terminal groups, and entry needle is contained in the marginal position of syringe front end.

Safe needle guard 430 has big caliber 432, and cyclic existing edge 434 is arranged on the middle position of needle guard, and this lip diameter is even as big as covering and protect the finger of holding needle guard 430.Simultaneously, for the ease of needle guard 430 and syringe 410 closely are nested together, one group of female thread 436 is engraved on the needle guard opening 432, and the external screw thread 424 that is looped around on the syringe front end pedestal 425 with another group matches.The slightly larger in diameter of this pedestal is in end 417, so that safe needle guard 430 can be engaged in the substrate 419 of syringe 412 effectively.

The actual injection application drawing of syringe cylinder among Fig. 9 presentation graphs 7 and Fig. 8 on staff 60 arms.Observed result shows, even injection tube 410 has the pedestal 425 of a bigger extension, so that mesh (not shown among Fig. 9) with safety needle guard 430, this pedestal does not influence injection operation.

Claims (6)

1, a kind of injection tube safety needle guard; it is characterized in that: it comprises a microscler hollow cylindrical tube; caliber is even as big as entangling entry needle easily; and there is a collar flange to be arranged on the pipe middle position; its diameter is enough to cover and protect the finger of holding safe needle guard; when engaging syringe and needle guard, can not run into the danger that entry needle is pinked.

2, injection tube safety needle guard according to claim 1, it is characterized in that it has a female thread and is arranged in the cylindrical crinoline district of injection tube front end, and has a thin plate that symmetrical circular arc and straight line periphery are arranged, be attached on the outer rim of needle guard opening part, this plate external form and above-mentioned built-in screw thread match, and can be engaged with the purpose that engages sealing to reach.

3, injection tube safety needle guard according to claim 1 is characterized in that it has the entry needle pedestal place that an external screw thread is arranged on the injection tube front end, and is provided with the female thread that is complementary at safety needle guard opening part.

4, injection tube safety needle guard according to claim 3, it is characterized in that its safe needle guard open tube footpath must even as big as by spiral way in conjunction with and cover the injection tube front end partly and entry needle.

5, injection tube safety needle guard according to claim 3, it is characterized in that its external screw thread is arranged on the locational eccentric evagination pedestal of injection tube front edge, and the size in safe needle guard open tube footpath is enough to by the spiral way combination and covers syringe cylinder front end evagination pedestal and entry needle.

6, injection tube safety needle guard according to claim 1, it is characterized in that safe needle guard is to be made by the elastic resin material, and rely on restored concerning the deformation characteristic of material itself and the stiction that produces by the juxtaposition metamorphose between the surface, realize the effect of safe needle guard sealing injection pin.

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