CN2140753Y - Safety structure of syringe - Google Patents

Abstract

The utility model relates to a novel structure of a syringe with safe use, which comprises an injection cylinder head, an injection cylinder and a liquid pushing rod. The injection cylinder head is mainly formed by that a needle head, a cone and two annular bodies with different outer diameters are formed into integration, wherein, the inner edge of the annular body with the large outer diameter is provided with a bulge ring; the liquid pushing rod is mainly composed of a liquid pushing rod, a liquid pushing plug, a rubber ring, a short cone, a circular ring and an easily fractured structure. After a needle cylinder is used, the liquid pushing rod is pushed to the end; in the liquid pushing rod, the liquid pushing plug and the bulge ring of the injection cylinder head are buckled into integration; the injection cylinder head associated with the liquid pushing rod is pulled out backward to the point of the easily fractured structure, and the liquid pushing rod is fractured; thus, the injection cylinder head with the needle head is reserved in the injection cylinder.

Description

Safety structure of syringe

This utility model system is about a kind of our syringe novel structure safe in utilization, particularly the fluid push rod fore device pushes away the liquid plug, after syringe is finished using, shifting fluid push rod onto the end contacts with the injection tube head, make the bulge loop inner edge that pushes away liquid plug and injection tube head be buckled into one, pull out fluid push rod more backward, the related injection tube head of backward pulling out.The short cone of mat fluid push rod and injection tube tail end medial flange are blocked, and the fluid push rod that fractures in a frangibility structure place, make the injection tube head that includes syringe needle stay in injection tube, reach and use the effect that goes up safety.

Because the progress and the development of medical science, the chance that the mankind use syringe cylinder gets more and more.But, remain many anti-diseases of failing to treat or give now,,, preferably carefully select syringe for use to keep the health and safety of user in order in medical procedure, can suitably to prevent these communicate illnesss.In fact, not only in medical procedure, should avoid pricking outside the used syringe needle of sufferer cleanup crew's safety in the time of more should guaranteeing in the end to handle accidentally.Therefore, syringe when use finishing and abandoning, syringe needle be manipulated so very important problem.

The general syringe later that uses traditionally all entangles syringe needle with a needle guard or high temperature meltdown syringe needle is handled.With the sheath protector, need more material and cost, and prick in one's hands or sheath problem such as come off because of carelessness when the sheath of insertion is arranged.With high temperature meltdown person, also person's anxiety of pricking accidentally, and need to handle in addition the residual metal that melts down etc.And this creation system designs the syringe of a simpler and easy processing, improving employed on the market at present syringe, and the never careful danger of being pricked by syringe needle that can be situated between.

The purpose of this utility model is to provide a kind of syringe novel structure safe in utilization, lies in syringe and uses when finishing, and syringe needle is remained in the injection tube, uses simple and easy processing and easily pricks syringe needle in one's hands, with maintenance safe.

Another purpose of the present utility model is to provide a kind of syringe novel structure safe in utilization, and it is with low cost, and is easy and simple to handle, and is applicable to ordinary consumer, uses preventing disease propagation.

A purpose more of the present utility model is to provide a kind of syringe novel structure safe in utilization, can save the required material of syringe needle oversheath and reduces cost.

Be feature and the function that more clearly demonstrates this creation, Zi Zuo describes the structure function of this creation in detail and uses situation as follows with graphic:

(1) diagram is partly:

Fig. 1 is each element axonometric chart of this creation;

Fig. 2 is the axonometric chart of this creation;

Fig. 3 A is the profile of this creation, shows that this creation fluid push rod is advanced to the operational scenario at the end;

Fig. 3 B is the profile of this creation, show this creation fluid push rod together with injection tube head post-tensioning to the operational scenario of blocking with flange;

Fig. 3 C is the profile of this creation, shows the operational scenario that this creation fluid push rod fractures;

Fig. 4 is the partial enlarged drawing of the frangibility structure of this creation; With

Fig. 5 is the partial enlarged drawing that pushes away liquid plug and change pattern of this creation.

(2) figure number is partly:

(11) (11 ') (11 ") push away liquid plug (12) rubber grommet

(13) the short cone of (15) circular rings (14) tool groove

(16) frangibility structure (17) snap point

(18) fluid push rod (19) circular base plate

(21) syringe needle (22) injection tube head

(23) the outstanding circular rings of injection tube (24)

(51) bulge loop (221) cone

(222) (223) ring bodies (311) flange

Now seeing also Fig. 1 to Fig. 5 especially is Fig. 1, and the syringe novel structure safe in utilization of this creation comprises that mainly injection tube head 22, an injection tube 23, that includes syringe needle 21 pushes away liquid plug 11, a fluid push rod 18 and a frangibility structure 16.Injection tube head 22 generally is the hollow taper, system is one-body molded by a syringe needle 21 and a cone 221 and the ring bodies 222 and 223 that outwards forms various outer diameter from this cone 221 in regular turn, one syringe needle 21 is to be fixed on the cone 221, and both axis direction unanimities, wherein the ring bodies 223 of big external diameter is the outermost end that is positioned at injection tube head 22, and edge proximal edge place has a bulge loop 51(as shown in Figure 5 within this ring bodies 223).Injection tube 23 generally is a hollow tube-shape body, and the one end is slightly condensation, and the ring bodies 222 of its inner rim system cooperation injection tube head 22 and 223 external diameter, so that this injection tube head 22 is engaged on the injection tube 23.The position of the other end outer rim of this injection tube 23 and contiguous its end has an outstanding circular rings 24, and the inwall of this injection tube 23, has a flange 311(as shown in Figure 3 in the position at outstanding circular rings 24 rears).Fluid push rod 18 generally is one to be the elongate structure body of cross section, and the one end connects one and pushes away liquid plug 11, pushes away liquid plug 11 adjoiners with this and then overlaps with a rubber grommet 12.The central part of this rubber grommet 12 forms cyclic depression, make its two ends comparatively outstanding, and fluid push rod 18 is adjacent to the position of rubber grommet 12, then forms a circular rings 13, so that make rubber grommet 12 location.In addition, the front end of fluid push rod 18 is near circular rings 13 places, having a frangibility structure is cone 16, and the top of this cone 16 is a snap point 17 connections and is fixed on the weak point cone 14 of tool groove that cone 16 bottoms then are connected with circular rings 15 and fix it.And, connect a circular base plate 19 as advancing the basis in the tail end of fluid push rod 18.

Operational approach of the present utility model, see also Fig. 3 system when user use syringe, after finishing, injection extracts when external, fluid push rod 18 is advanced to the end fully to contact with injection tube head 22, slightly exert pressure and force the liquid plug 11 that pushes away of fluid push rod 18 front ends to cross bulge loop 51, make the segmental liquid plug 11 that pushes away of bilobate be buckled into one fully with bulge loop 51 inner edges in the injection tube head 22.When user is pulled out injection tube 23 with fluid push rod 18 backward, the injection tube head 22 that then includes syringe needle 21 this moment is also together by past post-tensioning, and when fluid push rod 18 is pulled to its short cone with groove 14 and stops for the flange 311 of injection tube 23, being about to fluid push rod 18 fractures in snap point 17 places, make fluid push rod 18 be broken into two joints (seeing also Fig. 4), so, include the injection tube head 22 and combination of syringe needle 21, promptly retain in the injection tube 23 with joint fluid push rod 18 that pushes away liquid plug 11.Stop and circular rings 14 is an injection tube tail end medial wall edge flange 311, can prevent that it from coming off.Therefore, the easiest bundle people's syringe needle 21 partly then retains in the injection tube 23 safely.Thus, can reduce on the one hand to use when finishing the post processing syringe needle traditionally and be pricked because of carelessness, also can save the material of using as pinhead sleeve traditionally on the other hand, or destroy the cost that syringe needle was increased with hyperpyrexia at once after avoiding using.This shows that this creation improves the syringe that uses traditionally really and significantly;

Now see also Fig. 5, another embodiment of this creation of picture, lie in especially the SANYE of the other two kinds of patterns that push away liquid plug 11 fan-shaped push away liquid plug 11 ' with the fan-shaped liquid plug 11 that pushes away of four leaves "; all utilize bulge loop 51 on the macro ring medial wall edge of itself and injection tube head 22 to be easy to fastening and become one, pull out with fluid push rod 13 backward with the injection tube head 22 that will include syringe needle 21 easily.

Structure of the present utility model and feature; through above-mentioned detailed description and diagram; to more manifest; ought to be situated between be; these embodiment systems are only as illustrating the usefulness that preferable mode of operation is made in this creation; but not attempt is as limiting to some extent the creation scope, and any modification and change that does not break away under this creation spirit to be done all belongs to the protection of this utility model intention.

Claims (1)

1, a kind of syringe novel structure safe in utilization is characterized in that:

One injection tube head comprises that size two ring bodies of syringe needle and cone and various outer diameter are one-body molded; This syringe needle system is fixed on the circular cone, and both axis direction unanimities; Wherein the ring-type system of big external diameter is positioned at the outermost end of injection tube head, and the inner edge proximal edge place of this ring bodies has a bulge loop;

One injection tube comprises hollow tube-shape body, outstanding circular rings and flange, the slightly condensation of an end of this hollow tube-shape body, and its inner rim makes above-mentioned injection tube head be engaged in; Should outstanding circular ring system be positioned at the other end outer rim of this injection tube and the position of contiguous its end; This flange system is positioned at the inwall of this injection tube, and in the position at outstanding circular rings rear;

One fluid push rod comprises the elongate structure body fluid push rod that is cross section, pushes away the liquid plug, rubber grommet, two circular rings, short cone, frangibility structure and circular base plate that this pushes away the end that liquid plug system is fixed in this fluid push rod; This rubber ring system is adjacent to this and pushes away the liquid plug and be placed on the fluid push rod; This two circular ring system lays respectively at the two ends of frangibility structure; This frangibility structure is a cone, and to lack the top of cone for this cone, also is snap point, and the bottom of this cone then is fixed on the circular rings; This circular base plate system is positioned at the other end bottom of this fluid push rod;

Fluid push rod is advanced to the end, makes the bulge loop that pushes away liquid plug and injection tube head of fluid push rod fasten one fully, pull out fluid push rod more backward, the related injection tube head of backward pulling out; Short cone and injection tube tail end medial flange by frangibility structural edge in the fluid push rod are blocked, and the fluid push rod that fractures in frangibility structure place, so retain include syringe needle the injection tube head in injection tube, so that the safe handling syringe.

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