CN2234785Y

CN2234785Y - Safety disposable medical injector

Info

Publication number: CN2234785Y
Application number: CN 95229335
Authority: CN
Inventors: 谢玉奇; 沈树功; 刘岩
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-29
Filing date: 1995-12-29
Publication date: 1996-09-11
Anticipated expiration: 2005-12-29

Abstract

The utility model provides a safety disposable medical injector. The inner of the center through-hole at the needle holder is provided with a needle holder locking hole which is in the shape of a semi-spherical groove. The lower end of the piston head connected with a pushing handle is provided with a needle head locking head which is in the shape of semi-sphere. When the injector use is finished, the locking head of the needle head and the locking port of the needle holder can be jointed to be fixed to a whole convexly and concavely. An arrow-shaped hump with a barb on the cap of the needle head is used for closing off the needle cylinder to cause the needle head to be bended and destroyed. The utility model is provided with a needle head which can be pumped back to be fastened in the needle cylinder. The openings at the both ends of the needle cylinder are closed after be used, and the bend of the needle head is destroyed. The push handle can be taken off easily to cause the injector not to be reuse. Thereby, the utility model thoroughly avoid bringing about the possibility of injury infect and disease when needle instrument is recycled.

Description

Safety disposable medical syringe

This utility model relates to the syringe in the medical device, refers to a kind of safety disposable medical syringe especially.

Existing disposable medical syringe contains four parts, and promptly pin medicated cap, needle stand contain syringe needle, syringe and push away handle.After using, because syringe needle does not partly have appropriate protector, easily make user because of being caused contact infection by needle sting accidentally, this also is that present various big hospital staff infects the most recurrent reasons of other infectious disease such as hepatitis B and AIDS.Moreover because existing syringe is handled being difficult for after using, the example that when recycling, also often causes treatment people to be wounded by stabbing accidentally and catch, even flow into the market as it with or become child's toy, cause the misfortune source of other contingency generation.

Shortcoming at existing product, the purpose of this utility model is that the existing syringe of solution of wishing efficient and cost-effective is using thoroughly preventing of syringe needle accidental injury infection later, and drop to reusable chance minimum, even accidentally as outside school, peddling in the contained illegal businessman's hands that sinks of newspaper, also normal running and hurting innocent persons again, and aspect the recovery after use, also exhausted nothing is accidentally injured the possibility of staff.

The purpose of this utility model is achieved through the following technical solutions: safety disposable medical syringe of the present utility model, by syringe, push away handle, needle stand, syringe needle and needle cap and form:

A. needle stand is made of the cylinder and the frustum of a cone of disjunctor, this cylinder is loaded in the syringe, symmetrically arranged two axial notches are arranged on its cylinder, its cylinder middle part is useful on the annular groove of placing sealing rubber ring, the interior round-formed sealing of this rubber ring cylindrical and syringe, the described frustum of a cone stretches out in outside the syringe, its taper seat cooperates with the inner conical surface of commercially available standard needle, described needle stand center has for the mobile through hole of injection, this through hole is positioned at the intravital part of cylinder the needle stand locking mouth that is hemispherical groove, and there is the eck of inside contraction this groove porch;

B. there is screw rod the lower end that pushes away handle, this screw rod is connected with the screw at the leaf center, location of piston head upper end, described piston head is by the location leaf of upper end, the needle locking head of the flat body that the hemispherical that is being connected with thin neck of the cylinder at middle part and lower end is protruded constitutes, location, described upper end leaf is the flat plate that the face of cylinder is arranged, match with the syringe internal diameter in its face of cylinder, the cylindrical cylinder in described middle part is less than the cylinder of location leaf, there is annular groove at this cylindrical cylinder middle part, in this annular groove sealing rubber ring is housed, the interior round-formed sealing of the cylindrical of this rubber ring and syringe, the needle locking head of the flat of the hemispherical protrusion that the cylindrical lower end of described piston head is connecting with thin neck, the locking mouth of the hemispherical groove in its size and the needle stand endoporus is corresponding, and the eck that inwardly shrink the size of the thin neck of this elongated insertion part and needle stand endoporus further groove porch is corresponding;

C. the syringe needle location that oriented interior ring-type is protruded on the interior circle of the corresponding installation of syringe inner chamber needle stand position is protruding, its protrusion height is suitable, the permission needle stand is pushed by brute force but can not withdraw from easily, it is protruding near two symmetries are arranged on the circle in the syringe at syringe handle place to projecting inward piston head location, the width of the axial notch on its width and protrusion height and the needle stand cylinder is corresponding with the recessed degree of depth, its projecting height and corresponding with the cylindrical overall diameter in piston head middle part is to allow the piston head syringe of packing into;

D. the periphery of needle cap has the arrow-shaped projection of band barb.

In preferred embodiment, described syringe, to push away handle, piston head, needle stand, needle cap all made of plastic.

Characteristics of the present utility model are can smoothly syringe needle be recovered in the syringe to prevent accidental injury for asking syringe to finish using, the design has utilized the characteristic of plastic material, needle locking head with the piston head front end engages with needle stand locking mouth, so just, used syringe needle can be contained needle stand partly retracts in the syringe, owing to all added the rubber of a circle in the outer ring portion of needle locking head and needle stand locking mouth, utilize the elastic dilatation intensity of rubber institute tool, in the execution injection, can prevent that medicinal liquid from refluxing or leaking outside, add the protruding design in syringe needle location, with the frictional force of rubber part and needle tubing, the unlikely retraction of syringe needle or shake in the time of can guaranteeing to inject.Under the prerequisite that needle safety is handled, the design contains a flechette-type pin medicated cap in addition, after syringe centre that syringe needle is pulled back, the pin medicated cap is oppositely inserted among the syringe, except syringe needle being supported curved the destruction, and the opening portion that can guarantee syringe can be in full force and effect sealing, and avoid the danger that causes syringe needle to drop because of the influence of external force transporting in the process of reclaiming.Bonding operation as for needle locking head and needle stand locking mouth, only need user after injection finishes, push the big slightly strength of medicinal liquid in pushing away to impose on the handle, can feel that the needle stand elongated insertion part is engaged, this is to user and Yan Buxu accepts in addition special training and can tell difference, can use immediately, and the medicinal liquid under retaining in needle tubing is also many unlike present institute use needle set.Be the possibility of avoiding the syringe needle part to drop by the syringe other end, it is protruding that the design has added two piston heads location at the opening part of the syringe other end, when pushing away after handle retracts syringe with syringe needle, utilization pushes away the design of handle front end piston head location leaf, with the protruding stuck localized effect of rotation in piston head location, can be easily take off in the partial rotation that pushes away the handle union joint and push away handle pushing away handle, so just can be with the other end closure of openings of syringe, guarantee that fully used syringe needle no longer includes the possibility that is touched, and reach the purpose of this utility model.

This utility model has following positive beneficial effect:

Shortcoming at disposable syringe on the existing market, the utlity model has syringe needle can safe pumpback, be fixed in the syringe, use back syringe both ends open to be closed, the destroyed bending of needle point, push away handle and can take off easily syringe can't be re-used, occupation mode is simple, and is little with existing needle set occupation mode difference, need not expensive production equipment, can reach due economic benefit, syringe needle does not need the particular design manufacturing, can use existing general syringe needle, guarantee that the syringe needle pumpback no longer comes off in syringe, and the remaining medicament in injection back is few, when having little air to exist in the medicinal liquid, also only can be deposited in the needle stand elongated insertion part, and can not be injected in the human body, also can handle the injured possibility that catches when existing for another example needle set reclaims aspect other danger of nothing and the shortcoming in structure and use, the recovery after use easily.

Now in conjunction with the accompanying drawings with preferred embodiment:

Fig. 1 is an organigram of the present utility model, is full sectional view.

Fig. 2 is the detail of construction of needle stand among Fig. 1.

Fig. 3 is the right side view of Fig. 2.

Fig. 4 is the detail of construction of piston head among Fig. 1.

Fig. 5 is the right side view of Fig. 4.

Fig. 6 is the left side view of Fig. 4.

Fig. 7 is the detail of construction that pushes away handle among Fig. 1.

Fig. 8 is the A-A cross sectional view of Fig. 7.

Fig. 9 is the detail of construction of syringe among Fig. 1.

Figure 10 is the side view of Fig. 9.

Push away the handle pull-out location in Figure 11 diagrammatic sketch 1.

Needle locking head and needle stand locking mouthful bonded position in Figure 12 diagrammatic sketch 1.

Figure 13, Figure 14 show that the syringe needle part fixedly retracts in conjunction with the back, and the pin medicated cap makes syringe needle destroy crooked and pushes away the process that handle unloads.

Safety disposable medical syringe of the present utility model, by syringe 1, push away handle 2, needle stand 3, syringe needle 4 and needle cap 5 and form and see Fig. 1:

Needle stand 3 is made of the cylinder 6 and the frustum of a cone 7 of disjunctor, this cylinder 6 is loaded in the syringe 1, its cylinder has symmetrically arranged two axial notches 8, its cylinder middle part is useful on the annular groove 9 of placing sealing rubber ring 22, the interior round-formed sealing of these rubber ring 22 cylindricals and syringe 1, the described frustum of a cone 7 stretches out in outside the syringe 1, its taper seat cooperates with the inner conical surface of commercially available standard needle 4, described needle stand 3 centers have for the mobile through hole 10 of injection, this through hole 10 is positioned at the intravital part of cylinder the needle stand locking mouth 11 that is hemispherical groove, and there is the eck 12 of inside contraction these groove 11 porch;

The lower end that pushes away handle 2 has screw rod 13 to see Fig. 7 Fig. 8, this screw rod 13 is connected with the screw 21 at location leaf 15 centers of piston head 14 upper ends, described piston head 14 is by the location leaf 15 of upper end, the needle locking head 20 of the flat body that the hemispherical that is being connected with thin neck 19 of the cylinder 17 at middle part and lower end is protruded constitutes sees Fig. 4 Fig. 5 Fig. 6, location, described upper end leaf 15 is for there being the flat plate on the face of cylinder, match with the syringe internal diameter in its face of cylinder, the cylinder of described middle part cylinder 17 is less than the cylinder of location leaf 15, there is annular groove 16 at this cylindrical cylinder middle part, in this annular groove 16 sealing rubber ring 18 is housed, the interior round-formed sealing of the cylindrical of this rubber ring 18 and syringe 1, the needle locking head 20 of the flat body of the hemispherical protrusion that the lower end of described piston head cylinder 17 is connecting with thin neck 19, the locking mouth 11 of the hemispherical groove in its size and needle stand 3 endoporus is corresponding, and the eck 12 that inwardly shrink the size of the thin neck 19 of this elongated insertion part and needle stand 3 endoporus further groove porch is corresponding;

The syringe needle that oriented interior ring-type is protruded on the interior circle of the corresponding installation of syringe 1 inner chamber needle stand 3 positions is located protruding 24 and is seen Fig. 9 Figure 10, its protrusion height is suitable, permission needle stand 3 is pushed by brute force but can not withdraw from easily, near having two symmetries to locate protruding 23 on the circle in the syringe at syringe handle 26 places to projecting inward piston head, the width of the axial notch 8 on its width and protrusion height and the needle stand cylinder is corresponding with the recessed degree of depth, its projecting height and corresponding with the overall diameter of piston head middle part cylinder 17 is to allow piston head 14 syringe 1 of packing into;

The periphery of needle cap 5 has the arrow-shaped projection 25 of band barb to see Fig. 1.

Described syringe 1, to push away handle 2, piston head 14, needle stand 3, needle cap 5 all made of plastic.The retraction of syringe needle when protruding 24 the effect of locating of described syringe needle is to prevent to operate, piston head location leaf 15 and piston head are located protruding 23 synergy can be by finding out among Figure 13, pushing away handle link head 13 is connected with the mode of spiral and the central screw 21 of piston head location leaf 15, making piston push away handle 2 can rotate easily after drawing back syringe needle and take off, and the design of needle locking assembly 3, make this needle set can use syringe needle on the existing market, and do not need to design in addition particular needle.Needle locking head 20 and needle stand locking mouthful 11 engage can guarantee that syringe needle partly uses joint later and the reliability that retracts in the syringe.

Figure 12 for this needle set after when operation injection finishes, a needle locking head 20 and needle stand locking mouthful 11 situations that engage can spur behind joint and push away handle 2, used syringe needle 4 is pulled back into see Figure 13 in the syringe 1, and avoid the danger of syringe needle accidental injury fully.

Figure 13 Figure 14 shows that needle set syringe needle part has engaged fixing, and be withdrawn in the syringe, the pin medicated cap 5 of arrow type design inserts syringe by the syringe front end, except because of the design of barb 25 with the syringe closure of openings, the design of pin medicated cap front end also destroys used syringe needle 4 crooked very easily, reaches dual safety guarantee.When piston pushes away handle 2 and moves the syringe tail end to, locate protruding 23 the utilization of uniting because of the design of piston head location leaf 15 and piston head, can easily piston be pushed away handle 2 rotations and take off, seal the other end opening of syringe 1 so on the one hand, also stop piston on the other hand and pushed away the probability that handle 2 before pushes away again.

Claims

1. safety disposable medical syringe by syringe, push away handle, needle stand, syringe needle and needle cap and form, is characterized in that:

D. the periphery of needle cap has the arrow-shaped projection of band barb.

2. safety disposable medical syringe according to claim 1 is characterized in that: described syringe, to push away handle, piston head, needle stand, needle cap all made of plastic.