CN206138510U

CN206138510U - Safety type injector

Info

Publication number: CN206138510U
Application number: CN201620868541.0U
Authority: CN
Inventors: 王翠辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-11
Filing date: 2016-08-11
Publication date: 2017-05-03
Anticipated expiration: 2026-08-11

Abstract

The utility model relates to a safety type injector, including needle tubing, interior push rod, silica gel piston, syringe needle, its characterized in that: needle tubing outside cover is equipped with the overcoat, the needle tubing rear portion is equipped with external screw thread and retaining ring in proper order, the overcoat rear portion is equipped with the internal thread with matching the external screw, the overcoat rear end is equipped with in addition and utilizes the tear line to be connected between pull ring and pull ring and the overcoat, the pull ring is inboard to be equipped with the contrary dog of a plurality of wedges along circumference, the contrary not -go -end face of wedge contrary dog and the terminal surface top of keeping away from the external screw thread side of retaining ring are by being in the same place, the front portion of needle tubing is equipped with annular limiting groove, the overcoat corresponds the anterior position of internal thread and evenly is equipped with a plurality of tongue shape shell fragments along circumference, the inboard of tongue shape shell fragment be equipped with be used for with the spacing arch of annular limiting groove complex, the overcoat corresponds the anterior position of tongue shape shell fragment and is equipped with through -hole I along the circumference symmetry. Use reliable, not only avoided the syringe needle hurt sb. 's feelings and doctors and patients between cross infection takes place the circumstances take place, conveniently in addition do the split processing to syringe needle and needle tubing.

Description

Safety injector

Technical field

The present invention relates to medicine equipment, particularly a kind of safety injector.

Background technology

Existing injector for medical purpose by needle tubing, inner push-rod, the silica piston located at inner push-rod front end, located at needle tubing front end Syringe needle, the sheath composition on the outside of syringe needle.When using, the sheath on the outside of syringe needle need to be taken, draw medicine and complete injection Afterwards, sheath can not be placed on by syringe needle outside according to working specification again, to avoid stabbing finger infection is caused.But syringe needle it is exposed Outward, inconvenience is brought to the process work of syringe needle, and it is often the case that nurse is needed band after injection is completed for patient The syringe for having syringe needle brings back to nurse station unification and reclaims, and there is potential safety hazard during this.

The content of the invention

The invention aims to provide a kind of service-strong safety injector for solving the above problems, not only keep away Exempted from syringe needle hurt sb.'s feelings and doctors and patients between there is cross-infection situation occur, and be also convenient for making at fractionation syringe needle and needle tubing Reason.

The technical scheme is that：

A kind of safety injector, including needle tubing, inner push-rod, the silica piston located at inner push-rod front end, before needle tubing The syringe needle at end, it is characterised in that：The needle tubing outer sheath is equipped with overcoat, and the needle tubing rear portion is sequentially provided with external screw thread and back-up ring, The overcoat rear portion is provided with the internal thread coordinated with external screw thread, the overcoat rear end be additionally provided with draw ring and the draw ring and overcoat it Between connected using tear line, draw ring inner side is circumferentially arranged with multiple wedge shape check blocks, the check end of the wedge shape check block Together with face leans with the end face away from external screw thread side of back-up ring, the front portion of the needle tubing is provided with annular spacing groove, the overcoat The anterior position of correspondence internal thread is circumferentially uniformly provided with multiple ligulate shell fragments, be provided with the inside of the ligulate shell fragment for ring The spacing preiection that shape stopper slot coordinates, the anterior position of the overcoat correspondence ligulate shell fragment is circumferentially arranged with through hole I, works as tongue When spacing preiection on the inside of shape shell fragment snaps in the annular spacing groove of needle tubing, the through hole I is corresponding with the needle handle position of syringe needle.

Above-mentioned safety injector, the overcoat front end is provided with the through hole II passed through for the needle handle of syringe needle.

Above-mentioned safety injector, the anterior outer sheath inner circumferential surface of the internal thread is fitted with needle tubing outer peripheral face.

The invention has the beneficial effects as follows：

1st, due to setting overcoat on the outside of needle tubing, after the completion of action of injection, screw overcoat and depart from draw ring, and promote forward outer Set, finally makes the spacing preiection on the inside of ligulate shell fragment snap in the annular spacing groove of needle tubing, realizes positioning, and overcoat is to needle portion Defencive function is realized, prevents from causing syringe needle to accidentally injure, it is safe and reliable；

2nd, due to being provided with through hole I on the coat, the spacing preiection on the inside of ligulate shell fragment snaps in the annular spacing groove of needle tubing When, through hole I is corresponding with the needle handle position of syringe needle, facilitates and is separated syringe needle with needle tubing through through hole I using apparatus, and syringe needle is again Retracting device is fallen into by through hole II, realizes being separately recovered process to needle tubing and syringe needle；

3rd, due to adopting draw ring, it is therefore prevented that overcoat is misrouted, injection work is hindered；

4th, as a result of tear design, make medical personnel and patient mutually supervise syringe single use situation, keep away Exempt from syringe and flow into second-hand market, it is to avoid reuse.

Description of the drawings

Fig. 1 is the structural representation (correspondence embodiment 1, using front) of the present invention；

Fig. 2 is the structural representation (correspondence embodiment 1, using rear) of the present invention；

Fig. 3 is the left view of Fig. 2；

Fig. 4 is A portions enlarged drawing in Fig. 1；

Fig. 5 is the B portions enlarged drawing of Fig. 2；

Fig. 6 is the structural representation (correspondence embodiment 2) of the present invention.

In figure：Syringe needle 1, needle handle 2, silica piston 3, needle tubing 4, overcoat 5, inner push-rod 6, through hole I 7, through hole II 8, external screw thread 9th, draw ring 10, ligulate shell fragment 11, spacing preiection 12, back-up ring 13, wedge shape check block 14, annular spacing groove 15, internal thread 16.

Specific embodiment

Embodiment 1

As Figure 1-Figure 5, safety injector, including needle tubing 4, inner push-rod 6, located at the silica gel of the front end of inner push-rod 6 Piston 3, located at the syringe needle 1 of the front end of needle tubing 4, the outer sheath of the needle tubing 4 is equipped with overcoat 5.The rear portion of the needle tubing 4 is sequentially provided with outer spiral shell Line 9 and back-up ring 13, the rear portion of the overcoat 5 is provided with the internal thread 16 coordinated with external screw thread 9, and the rear end of the overcoat 5 is additionally provided with draw ring Connected using tear line between 10 and the draw ring 10 and overcoat 5, the inner side of the draw ring 10 is circumferentially arranged with multiple wedge shape checks Block 14, together with the check end face of the wedge shape check block 14 is leaned with the end face away from the side of external screw thread 9 of back-up ring 13.The pin The front portion of pipe 4 is provided with annular spacing groove 15, and the position of the correspondence internal thread 16 of the overcoat 5 front portion is circumferentially uniformly provided with multiple tongues Shape shell fragment 11, the inner side of the ligulate shell fragment 11 is provided with the spacing preiection 12 for coordinating with annular spacing groove 15.The overcoat 5 The position of the front portion of correspondence ligulate shell fragment 11 is circumferentially arranged with through hole I 7, when the spacing preiection 12 of the inner side of ligulate shell fragment 11 is snapped in During the annular spacing groove 15 of needle tubing 4, the through hole I 7 is corresponding with the position of needle handle 2 of syringe needle 1.The front end of the overcoat 5 is provided with confession The through hole II 8 that the needle handle 2 of syringe needle 1 is passed through, prevents finger from stretching in overcoat 5, it is adaptable to the thicker situation of needle tubing.The internal thread The inner peripheral surface of overcoat 5 of 16 front portions is fitted with the outer peripheral face of needle tubing 4.

Embodiment 2

As shown in fig. 6, in the present embodiment, the external diameter phase of internal diameter and needle tubing 4 at the top of the overcoat 5 of the safety injector Deng, it is adaptable to the thinner situation of needle tubing.Other are with embodiment 1.

Claims

1. a kind of safety injector, including needle tubing, inner push-rod, the silica piston located at inner push-rod front end, located at needle tubing front end Syringe needle, it is characterised in that：The needle tubing outer sheath is equipped with overcoat, and the needle tubing rear portion is sequentially provided with external screw thread and back-up ring, institute State overcoat rear portion and be provided with the internal thread coordinated with external screw thread, the overcoat rear end is additionally provided between draw ring and the draw ring and overcoat Connected using tear line, the draw ring inner side is circumferentially arranged with multiple wedge shape check blocks, the check end face of the wedge shape check block Together with leaning with the end face away from external screw thread side of back-up ring, the front portion of the needle tubing is provided with annular spacing groove, the overcoat pair The position for answering internal thread anterior is circumferentially uniformly provided with multiple ligulate shell fragments, be provided with the inside of the ligulate shell fragment for annular The spacing preiection that stopper slot coordinates, the anterior position of the overcoat correspondence ligulate shell fragment is circumferentially arranged with through hole I, works as ligulate When spacing preiection on the inside of shell fragment snaps in the annular spacing groove of needle tubing, the through hole I is corresponding with the needle handle position of syringe needle.

2. safety injector according to claim 1, it is characterised in that：The overcoat front end is provided with the needle handle for syringe needle The through hole II for passing through.

3. safety injector according to claim 1, it is characterised in that：The anterior outer sheath inner circumferential surface of the internal thread with Needle tubing outer peripheral face is fitted.