CN2640497Y

CN2640497Y - Disposable self-destroying syringe

Info

Publication number: CN2640497Y
Application number: CN 03270801
Authority: CN
Inventors: 张少军; 王福茂
Original assignee: Shinva Medical Instrument Co Ltd
Current assignee: Shinva Medical Instrument Co Ltd
Priority date: 2003-08-27
Filing date: 2003-08-27
Publication date: 2004-09-15
Anticipated expiration: 2013-08-27

Abstract

The utility model provides a disposable safety self-destruction injector, which comprises a needle head, a connecting seat, a rubber plug, a push rod and a syringe; wherein the needle head adopts standard needle head, the connecting seat is arranged in the shrink mouth at the top of the syringe and damp-sealed with the inner surface. The utility model is characterized in that: the front end of the connecting seat is connected with the screw threads of the syringe to ensure a tight connection of the seal surface; the center is the perforative liquid drug passage; a tooth hole with inner teeth is arranged at the bottom of the liquid drug passage; a diameter-reducing buckle hole is arranged at the front end of the tooth hole; a tooth column meshed with the tooth hole is arranged at the front end of the rubber plug of the push rod; a buckle head is arranged at the front end of the tooth column; the buckle head comprises a head part and a round column; the cross section at the end of the head part is slightly bigger than the cross section of the buckle hole and the round column. When the push rod is pushed to the end and the injection is finished, the buckle head enters the buckle hole to combine the push rod and the connecting seat as a whole body; the tooth column and the tooth hole are meshed with each other; when the push rod is rotated and drawn back, the connecting seat is retracted to hide in the syringe together with the push rod; therefore, the utility model truly realizes disposable usage, safety and self-destruction.

Description

Disposable safety self-breaking injector

Affiliated technical field

This utility model provides a kind of disposable safety self-breaking injector, belongs to the injector technology field.

Background technology

Present disposable syringe is provided with injection back self-destroying function more, prevents from repeatedly to use, and causes adverse consequences to patient.After syringe used the contact sick body, outside contaminated syringe needle just was exposed to, medical worker or cleaning employee did not note slightly, are very easily infected by needle sting.At the problems referred to above, existing at present technology report about safe re-use preventing once-used syringe, as Chinese patent communique disclosed utility model patent on April 17th, 2002: the safety self-destructing disposable sterilized syringe, the patent No.: 01221139 by overcoat, core bar in the overcoat, the sealing ring of core bar head, the syringe needle that is connected with overcoat, and pinhead sleeve etc. form, the forward connection tube of its overcoat, the needle stand of syringe needle are installed in the overcoat connection tube, outer wall at needle stand is equipped with spring, and core bar is a hollow pipe, on the top of core bar bottom plug is installed, and the core bar bottom plug matches with the afterbody of needle seat, after the liquid medicine injection injection finishes, core bar bottom plug and syringe needle in the automatic indentation core bar, prevent that syringe needle from scratching skin and causing infection under the effect of spring force, avoid after the self-destruction reusing.Defective is that parts are many, complex structure, cost height.

The utility model content

The purpose of this utility model provide a kind of can overcome above-mentioned defective, simple in structure, be suitable for producing in batches, the disposable safety self-breaking injector of excellent working performance.Its technical scheme is:

Comprise syringe needle, Connection Block, plug, push rod and syringe, wherein syringe needle adopts standard needle, Connection Block places in the vertical reducing of syringe and with its inner surface damping and seals, plug places in the syringe and with its inner surface damping and seals, push rod push-and-pull in syringe is slided, it is characterized in that: the front end outer surface of Connection Block is provided with lug, the syringe inner surface is provided with one section screw thread, both are threaded, the end of Connection Block is conical seal (contact) face and syringe cone-shaped inner surface damping sealing, the center is the medicine liquid channel that runs through, the bottom of medicine liquid channel is the perforation that is provided with internal tooth, what be positioned at the perforation front end is the connecting hole of undergauge, the corresponding tooth post of setting up dop and having external tooth with it, wherein the tooth post is located at push rod front end and protruding front end in plug and is used with perforation and mesh, dop is arranged on tooth post front end, comprise a head and a cylinder, head is linked to the cylinder front end, and the cross section of head front end is little than the rear end, the cross section of its rear end is slightly larger than connecting hole and cylindrical cross-section, and head and tooth post are provided with guiding gutter.

Described disposable safety self-breaking injector, the thread rotary orientation of syringe needle and Connection Block is opposite with the thread rotary orientation of Connection Block and syringe.

Described disposable safety self-breaking injector is positioned at push rod on the rib muscle of syringe and is provided with the mouth that fractures.

Its operation principle is: after the syringe pump injecting liquid drug finishes, dop enters in it along with the propelling of push rod supports out connecting hole, because making push rod engage with Connection Block, the condensation of connecting hole is one, the tooth post also entered perforation both meshed together this moment, the reverse rotation push rod is because the engagement of tooth post and perforation, will make that Connection Block rotates synchronously with push rod, final Connection Block is threaded with the syringe disengaging, the pumpback push rod, syringe needle, Connection Block will be hidden in the syringe in company with the push rod retraction, prevent that syringe needle from scratching skin and causing infection.This utility model need not any the 3rd adnexa auxiliary, lock mutually by self part and can realize self-destruction, really realize disposable, safety, self-destruction.

Description of drawings

Fig. 1 is the structural representation of this utility model embodiment;

Fig. 2 is the structural representation that A embodiment illustrated in fig. 1 partly amplifies;

Fig. 3 is the profile of middle tooth post embodiment illustrated in fig. 1 and perforation engagement.

The specific embodiment

1, syringe needle 2, Connection Block 3, plug 4, push rod 5, syringe 6, medicine liquid channel 7, perforation 8, connecting hole 9, tooth post 10, head 11, cylinder 12, fracture mouthfuls 13, sealing ring 14, guiding gutter 15, lug 16, needle shield

Syringe needle 1 adopts standard needle to be threaded with Connection Block 2, Connection Block 2 places in the syringe 5 vertical reducings, its front end outer surface is provided with lug 15, syringe 5 inner surfacies are provided with one section screw thread, both are threaded, the end of Connection Block 2 is conical seal (contact) face and syringe 5 cone-shaped inner surface dampings sealing, its center is the medicine liquid channel 6 that runs through, the bottom of medicine liquid channel 6 is the perforation 7 that is provided with internal tooth, what be positioned at perforation 7 front ends is the connecting hole 8 of undergauge, plug 3 places in the syringe 2, its outer wall is provided with the inner surface damping sealing of sealing ring 13 with the syringe 2 of multiple tracks projection, push rod 4 push-and-pull in syringe 5 is slided, be located at push rod 4 front ends and protruding with the tooth post 9 of perforation 7 engagements in the front end of plug 3, dop is arranged on tooth post 9 front ends, comprise a head 10 and a cylinder 11, head 10 is linked to this cylinder 11 front ends, the cross section of head 10 front ends is little than the rear end, and the cross section of these head 10 rear ends is slightly larger than connecting hole 8 and cylinder 11 cross sections, head 10 and tooth post 9 are provided with guiding gutter 14 and avoid medicinal liquid residual, are positioned at push rod 4 to be provided with on the rib muscle of syringe 2 to fracture mouthfuls 12.

Claims

1, a kind of disposable safety self-breaking injector, comprise syringe needle (1), Connection Block (2), plug (3), push rod (4) and syringe (5), wherein syringe needle (1) adopts standard needle, Connection Block (2) places in the vertical reducing of syringe (5) and with its inner surface damping and seals, plug (3) places in the syringe and with its inner surface damping and seals, push rod (4) push-and-pull in syringe (5) is slided, it is characterized in that: the front end outer surface of Connection Block (2) is provided with lug (15), syringe (5) inner surface is provided with one section screw thread, both are threaded, the end of Connection Block (2) is conical seal (contact) face and syringe (5) cone-shaped inner surface damping sealing, Connection Block (2) center is the medicine liquid channel (6) that runs through, the bottom of medicine liquid channel (6) is the perforation (7) that is provided with internal tooth, what be positioned at perforation (7) front end is the connecting hole (8) of undergauge, the corresponding tooth post (9) of setting up dop and having external tooth with it, wherein tooth post (9) is located at push rod (4) front end and protruding front end in plug (3) and is used with perforation (7) and mesh, dop is arranged on tooth post (9) front end, comprise a head (10) and a cylinder (11), this head (10) is linked to cylinder (11) front end, the cross section of its front end is little than the rear end, and the cross section of this head rear end is slightly larger than connecting hole (8) and cylinder (11) cross section, and head (10) and tooth post (9) are provided with guiding gutter (14).

2, disposable safety self-breaking injector as claimed in claim 1 is characterized in that: syringe needle (1) is opposite with the thread rotary orientation of syringe (5) with the thread rotary orientation and the Connection Block (2) of Connection Block (2).

3, disposable safety self-breaking injector as claimed in claim 1 is characterized in that: be positioned at push rod (4) and be provided with fracture mouthful (12) on the rib muscle of syringe (5).