CN2817871Y

CN2817871Y - Self-destructive and steel-needle return-drawing syringe

Info

Publication number: CN2817871Y
Application number: CN 200520024849
Authority: CN
Inventors: 许骥
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-14
Filing date: 2005-09-14
Publication date: 2006-09-20
Anticipated expiration: 2015-09-14

Abstract

The utility model discloses a self-destruction and steel-needle return-drawing syringe which relates to an appliance of disposable self-destruction syringes in the field of medical instruments. The utility model is composed of a needle head, a needle cylinder, a pushing rod, a cylindrical rubber plug, a conical rubber plug, a thin-layer rubber plug, a big disc, a small disc, a connecting rod, etc. The utility model uses the mode that the needle head is inserted in the cylindrical rubber plug to form damping connection, the tail end of the needle head is made into an arrow-shaped or anchor-shaped structure which can puncture the thin-layer rubber plug at the top end of the pushing rod and is inserted in a hole in the small disc; after injection is finished, the pushing rod is back drawn to drive the small disc and the arrow-shaped tail end of the needle head together to draw back the needle head in the needle cylinder, a needle passage hole of the needle head in the cylindrical rubber plug is closed by the needle passage hole and then the pushing rod is broken to achieve the purpose of shape destruction of the syringe. The utility model has the advantages of simple structure, low requirements of production process, low assembly difficulty, convenient operation and use, no pollution, safety, low cost price, etc., and is particularly suitable for being used as an appliance of the disposable self-destruction syringes for medical departments.

Description

Draw point pumpback self-destruction syringe

Technical field

This utility model relates to a kind of draw point pumpback self-destruction syringe in the medical instruments field, is specially adapted to do in the medical department Disposable, self-destroying syringe utensil.

Background technology

Syringe is an apparatus commonly used in the medical treatment, and traditional syringe has following shortcoming: 1, because outside the syringe needle of finishing using still is trapped in, the collection of medical waste, transport and processing procedure in accidentally injure the medical worker easily, cause pathophoresis.2, finish using the back in the syringe medicinal liquid or blood by syringe needle to external leakage, contaminated environment causes cross infection easily.3, because traditional disposable syringe can not damage after using voluntarily, some lawless persons collect exhausted disposable syringe and reuse for having tried to gain sudden huge profits, punish severely the health that has endangered the patient.

Above shortcoming in view of conventional syringe, can automatically damaging shape after many countries have made laws and required to promote the use of and be difficult for the safety self-destruction syringe that the personnel that cause accidentally injure, also carried out the exploitation of Related product in China, but the self-destruction syringe of existing market has the following disadvantages mostly: 1, complex structure, higher to technological requirement, assembly difficulty is bigger, thereby causes cost to increase, and has influenced popularization clinically.Design is all installed a locker additional in addition at the draw point afterbody as great majority, makes manufacturing, comparatively difficulty is installed all, and increase cost.2, widely different because of structure and conventional syringe, need do bigger change to existing production line, increase the actual production input greatly.3, adopt needle holder to link to each other with syringe more, use the back syringe needle to regain in the syringe together with needle holder, residual liquor or blood leak out contaminated environment from the vertical opening part of syringe easily.In view of above reason, existing at present self-destruction syringe popularization clinically is unsatisfactory.

Summary of the invention

The purpose of this utility model is to avoid the weak point in the above-mentioned background technology and provides a kind of syringe needle automatic pumpback to go into the interior safety draw point pumpback self-destruction syringe of syringe, and this utility model also has simple in structure, low to manufacturing technique requirent, assembly difficulty is little, easy for operation, characteristics such as non-pollution safety is reliable, and is with low cost.

The purpose of this utility model is achieved in that this utility model, and it comprises syringe needle 1, cylinder plug 2, thin layer plug 6, cone plug 8, syringe 9, push rod 10, ends mistake bar 12, roundel 15, big disk 16, connecting rod 17, wherein syringe needle 1 backshank is provided with that side opening 4 structures, backshank side opening 4 tops are provided with stop ring tongue 3 structures, the backshank tail end is provided with sheet shape arrow shaped or anchor shape 5 structures, syringe 9 front ends are provided with the cone funnel-shaped structure, and syringe 9 tail ends are provided with ring groove 11 flange structures; Wedge shape snap slot 13 structures are set on the bar of push rod 10, and the push rod 10 tail end pressing plate back sides are provided with ends mistake bar 12 structures, ends mistake bar 12 and is connected with the pressing plate injection moulding; Cylinder plug 2 is bonded in the syringe 9 front end cone funnel-shaped structure funnel oral pores, syringe needle 1 front end is inserted into and constitutes the damping connection in the cylinder plug 2, backshank stop ring tongue 3 sealing is fitted on 2 of the cylinder plugs, connecting rod 17 upper ends are provided with pin and wear mesopore 7 structures, bonding or the injection moulding of the front end of push rod 10 and big disk 16 is installed and is connected, bonding or the injection moulding of connecting rod 17 lower ends and big disk 16 is installed and is connected, connecting rod 17 upper end pins are worn bonding installation roundel 15 above the mesopore 7, roundel 15 centers are provided with backshank puncturing hole structure, thin layer plug 6 is bonded on 15 of the roundels, and cone plug 8 suits are bonded on the connecting rod 17; The thin layer plug of installing on push rod 10 and the front end thereof 6, cone plug 8, roundel 15, big disk 16, connecting rod 17 are actively plugged in the syringe 9, are assembled into syringe.

This utility model is compared background technology and is had following advantage:

1, this utility model is simple in structure, cancelled needle holder, do not needed to install locker additional, syringe needle 1 afterbody directly has been processed into arrow shaped or anchor shape structure at backshank, just can draw back syringe needle 1 in the syringe 9 automatically behind the end of operation, therefore require low manufacturing and assembly technology.

2, the design of this utility model total is compared with conventional syringe and is changed not quite, has simplified syringe needle 1 and syringe 9 connected modes, and mould and production line are not needed to do very big change, and parts are less in addition, and assembly difficulty is little, and is with low cost, is convenient to clinical application.

3, this utility model syringe needle 1 and syringe 9 tops adopt cylinder plug 2 to carry out damping to be connected, when syringe needle 1 is retracted into syringe 9 in after, the interior needle track holes of former cylinder plug 2 are closure voluntarily, prevents that medicinal liquid or blood to external leakage, having avoided pollution.

4, this utility model syringe 9 tail ends are provided with ring groove 11 structures, and processing wedged snap slot 13 structures on the push rod 10 can stop push rod 10 front ends to be drawn out outside the syringe 9, having operated rear push-rod 10 frangibility unmakes, both increased sealing, and prevented from again to reuse, had safe and reliable.

Description of drawings

Fig. 1 is a mounting structure sketch map of the present utility model.

The specific embodiment

With reference to Fig. 1, this utility model comprises syringe needle 1, cylinder plug 2, thin layer plug 6, cone plug 8, syringe 9, push rod 10, ends mistake bar 12, roundel 15, big disk 16, connecting rod 17.Wherein syringe needle 1 backshank sidepiece is processed a side opening 4, and its effect is to make syringe needle 1 feed liquor or discharge opeing.Stop ring tongue 3 structures are processed on backshank side opening 4 tops, embodiment stop ring tongue 3 can be the annular seal ring that is fixed on the syringe needle 1, also can directly paint cyclic adhesive on syringe needle 1 surface and make, its effect is to penetrate thin layer plug 6 when inserting the puncturing hole of roundels 15 and pin and wearing in the mesopore 7 when backshank thorn; Syringe needle 1 is unlikely to cause side opening 4 to be pressed in the cylinder plug 2 because of outwards moved by thrust.The backshank tail end is suppressed shape arrow shaped in blocks or anchor shape 5 structures, for embodiment backshank easy to process is pressed into arrow shape structure by tubular shape, its effect penetrates arrow shaped or anchor shape structure thorn and blocks on roundel 15 after thin layer plug 6 back insertion pins are worn in the mesopore 7, be convenient to when push rod 10 is pulled outwardly in the syringe needle 1 automatic suction syringe 9, embodiment syringe needle 1 adopts existing draw point machining to be pressed into syringe needle, side opening 4, reaches arrow shaped 5 backshanks.

This utility model syringe 9 front ends are provided with the cone funnel-shaped structure, and its effect is convenient to cylinder plug 2 is installed in the funnel oral pore, and cylinder plug 2 adhering and sealings are installed in the funnel oral pore.Syringe needle 1 front end is inserted into and constitutes the damping connection in the cylinder plug 2, in order to increase contact resistance, the surface of syringe needle 1 and cylinder plug 2 contacts site can be made into coarse shape or the surface scribbles dried adhesive coating, stop ring tongue 3 sealing on the syringe needle 1 is fitted on 2 of the cylinder plugs, prevents from that syringe needle 1 is stressed outwards to move.The tail end of syringe 9 is pressed into ring groove 11 flange structures, ring groove 11 interaction energies block big disk 16, stop push rod 10 front ends and be drawn out syringe 9, the flange effect makes when having an injection finger can clamp syringe 9 and injects and push away the liquid location, and the funnel-shaped structure of embodiment syringe 9 and front end thereof and the ring groove of tail end 11, flange structure all adopt the transparent non-toxic plastics injection compression to form.Cylinder plug 2 adopts elastomeric material to be pressed into.

Processing wedged snap slot 13 structures on this utility model push rod 10 bars, its effect is extracted push rod 10 out and is convenient to the manual push rod that fractures after the needle tubing injection finishes, reach the purpose of unmaking fully, embodiment wedge shape snap slot 13 is processed into triangle degree of lip-rounding structure, and push rod 10 is processed into the cruciform skeleton structure.The push rod 10 tail end pressing plate back sides are provided with ends mistake bar 12, is connected with the pressing plate injection moulding, and its effect is avoided because of maloperation damages syringe, and embodiment ends mistake bar 12 and is injection molded into strip structure, ends mistake bar 12 and should break off with the fingers and thumb down from push rod 10 tail ends before use.Embodiment push rod 10 and the only mistake bar 12, the wedge shape snap slot 13 that are provided with all adopt transparent non-toxic plastics once injection molded.

Bonding or the injection mo(u)lding of the front end of this utility model push rod 10 and big disk 16 is connected, embodiment big disk 16 adopts non-toxic transparent plastic and push rod 10 integral molded plastics to form, the internal diameter size of the outside dimension of big disk 16 and syringe 9 is seamless sealing activity tight fit, big disk 16 can be moved up and down in syringe 9, and its effect reaches syringe 9 internal energy drawing liquid or injections.Bonding or the injection mo(u)lding of connecting rod 17 lower ends and big disk 16 is connected, embodiment adopts injection moulding to connect, connecting rod 17 upper end processing and fabricating pins are worn mesopore 7 structures, the bonding cone plug 8 of suit on connecting rod 17 external diameters, embodiment connecting rod 17 adopts the non-toxic plastic injection moulding to be processed into the cruciform skeleton structure, wear mesopore 7 in its top upper end injection moulding machined needles, pin is worn mesopore 7 effects can be inserted in the mesopore 7 syringe needle 1 tail end arrow shaped or anchor shape 5 backshanks.Cone plug 8 adopts elastomeric material to process.The funnelform vertebra degree of the vertebra degree size of cone plug 8 and syringe 9 front ends is of a size of seamless sealing activity tight fit, and cone plug 8 can be moved up and down in syringe 9, with big disk 16 reach together and syringe 9 between sealing process, prevent that liquid from oozing out.

This utility model roundel 15 bonding connecting rod 17 upper end pins that are installed in are worn above the mesopore 7, and pin is worn the aperture, the degree of depth of mesopore 7 all greater than backshank arrow shaped or anchor shape 5 structure external diameter and length.Roundel 15 centers are provided with backshank puncturing hole structure, and the pore size of its backshank puncturing hole is less than syringe needle 1 tail end arrow shaped or anchor shape 5 structure external diameters, can catch on the face of roundel 15 after the extruding of tail end arrow shaped or anchor shape 5 structures is inserted.Thin layer plug 6 and 15 bonding connections of roundel, its effect is not punctured syringe needle 1 tail end arrow shaped or anchor shape 5 structures and is sealed before the thin layer plug 6, wear and be stuck in the mesopore 7 on 15 of the roundels when the saturating thin layer plug of puncture 6 inserts pins, when push rod 10 pumpbacks, syringe needle 1 is drawn back in the syringe 9 automatically, embodiment roundel 15 adopts transparent non-toxic plastics to be processed into wafer architecture, and thin layer plug 6 adopts elastomeric material to be processed into disk shape structure.Needle track hole after in syringe needle 1 is drawn back syringe 9 in the cylinder plug 2 is because caoutchouc elasticity effect auto-closing, prevents from that leak of liquid is excessive to have avoided pollution.The thin layer plug of installing on push rod 10 and the front end thereof 6, cone plug 8, roundel 15, big disk 16, connecting rod 17 are actively plugged in the syringe 9, be assembled into syringe, the moving up and down of push rod 10 can drive connecting rod 17 and move up and down together, reaches drawing liquid, injection purpose.

This utility model operating process is as follows: break off with the fingers and thumb down earlier and end mistake bar 12, get final product drawing liquid or injection according to a conventional method, medicinal liquid is by 4 turnover of the side opening on the syringe needle 1, when injection finishes, the thin layer plug 6 at push rod 10 tops is pierced through by the arrow shaped of syringe needle 1 tail end or anchor shape 5 structures, make backshank insert pin and wear in the mesopore 7, arrow shaped or anchor shape 5 structures are stuck on 15 of the roundels, and syringe needles are stressed outwards to be moved because the stop ring tongue 3 on the syringe needle 1 stops.Pumpback this moment push rod 10, in the syringe needle 1 automatic suction syringe 9, the needle track hole is closed voluntarily because of the elasticity of rubber on the cylinder plug 2, has avoided syringe inner liquid medicine or blood leakage by roundel 15.When push rod 10 pumpbacks are pulled to ring groove 11 places of syringe 9 tail ends, unlikely being drawn out of outside the syringe that be stuck of the big disk 16 on the push rod 10 constitutes the sealing of syringe, and can break disconnected push rod 10 off with the fingers and thumb this moment from wedge shape snap slot 13, reaches the syringe purpose of unmaking fully.

Claims

1, a kind of draw point pumpback self-destruction syringe, it comprises syringe needle (1), syringe (9), push rod (10), it is characterized in that: also comprise cylinder plug (2), thin layer plug (6), cone plug (8), end mistake bar (12), roundel (15), big disk (16), connecting rod (17), wherein syringe needle (1) backshank is provided with side opening (4) structure, backshank side opening (4) top is provided with stop ring tongue (3) structure, the backshank tail end is provided with sheet shape arrow shaped or anchor shape (5) structure, syringe (9) front end is provided with the cone funnel-shaped structure, and syringe (9) tail end is provided with ring groove (11) flange structure; Wedge shape snap slot (13) structure is set on the bar of push rod (10), and push rod (10) the tail end pressing plate back side is provided with ends mistake bar (12) structure, ends mistake bar (12) and is connected with the pressing plate injection moulding; Cylinder plug (2) is bonded in syringe (9) the front end cone funnel-shaped structure funnel oral pore, syringe needle (1) front end is inserted into and constitutes the damping connection in the cylinder plug (2), backshank stop ring tongue (3) sealing is fitted on cylinder plug (2) face, connecting rod (17) upper end is provided with pin and wears mesopore (7) structure, or the injection moulding bonding with big disk (16) of the front end of push rod (10) installed and is connected, or the injection moulding bonding with big disk (16) of connecting rod (17) lower end installed and is connected, connecting rod (17) upper end pin is worn bonding installation roundel (15) above the mesopore (7), roundel (15) center is provided with backshank puncturing hole structure, thin layer plug (6) is bonded on roundel (15) face, and cone plug (8) suit is bonded on the connecting rod (17); The thin layer plug of installing on push rod (10) and the front end thereof (6), cone plug (8), roundel (15), big disk (16), connecting rod (17) are actively plugged in the syringe (9), are assembled into syringe.