CN202277577U

CN202277577U - Sterile syringe

Info

Publication number: CN202277577U
Application number: CN2011203788278U
Authority: CN
Inventors: 张文智; 何蕾; 苏茂生
Original assignee: Chinese PLA General Hospital
Current assignee: Chinese PLA General Hospital
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2012-06-20
Anticipated expiration: 2021-09-30

Abstract

The utility model relates to a sterile syringe, which comprises a syringe inner tube, a syringe outer tube and a needle connecting tube. The top wall of the syringe outer tube is provided with a through hole, the syringe inner tube is positioned inside the syringe outer tube, an annular rodless piston is mounted inside the syringe outer tube, a first magnet is disposed in the rodless piston, a rod piston is mounted in the syringe inner tube, a second magnet is disposed at the piston end of the rod piston, the first magnet and the second magnet attract each other, the upper end face of the piston end of the rod piston is provided with at least one first vent hole, and the top of the syringe outer tube is provided with at least one second vent hole. An annular space between the syringe outer tube and the syringe inner tube is a closed space except for the second vent holes and a liquid outlet, so that a sterile environment is provided. The sterile syringe is simple and compact in structure, has no air guide tube, and is high in stability, simple in operation, and operable with a single hand.

Description

Asepsis injector

Technical field

This utility model relates to a kind of mode with subcutaneous injection, intravenous injection or intramuscular injection medium is introduced intravital apparatus, particularly relates to a kind of asepsis injector.

Background technology

Syringe is the most common a kind of medical instruments in medical treatment; Though the syringe that uses at present great majority are disposable syringe, greatly reduce the probability of cross infection, but still be difficult to guarantee that no pathogenic bacteria exists in the syringe; Trace it to its cause mainly is because the inwall of syringe is in communication with the outside; Piston possibly take the pathogenic bacteria that is attached on the tube wall in the medicinal liquid in moving process, gets in patient's body, causes cross infection.Chinese patent CN201880134U discloses a kind of asepsis injector, and is as shown in Figure 1, comprises a syringe 1 '; Syringe 1 ' lower end is provided with injection needle, in syringe 1 ', is provided with rodless piston 2 ', and the upper end of syringe 1 ' is connected with airway 4 ' through union joint 3 '; The other end of airway 4 ' connects pneumatic tube 5 ', is provided with bar piston 6 ' in the pneumatic tube 5 ', promotes rodless piston 2 ' through air pressure during use and moves up and down; Syringe 1 ' is not in communication with the outside, guarantees the gnotobasis in the syringe 1 ', avoided cross infection; But this device volume is big, uses inconvenience, needs a hand operated syringe during use; One hand operated pneumatic tube, and the airway existence that connects syringe and pneumatic tube has reduced the stability of asepsis injector because of being connected tight or damaging the possibility that leaks air.

The utility model content

The technical problem that this utility model will solve provides a kind of simple in structure, easy and simple to handle and stable high asepsis injector.

A kind of asepsis injector of this utility model comprises syringe body and has bar piston, syringe body to comprise that pipe, syringe urceolus and entry needle are taken in the syringe; Offer through hole on the roof of syringe urceolus, offer liquid outlet on the diapire of syringe urceolus, liquid outlet is taken over the entry needle that is fixedly mounted on syringe urceolus diapire and is communicated with; Pipe is positioned at the syringe urceolus in the syringe, and the lower end of pipe is fixedly connected with syringe urceolus diapire in the syringe, and the upper end of pipe is fixedly connected with the through hole hole wall of the roof of syringe urceolus in the syringe; Liquid outlet is positioned at outside the syringe pipe; Circular rodless piston is installed in the syringe urceolus, and the outer circumference surface of rodless piston contacts with the inner peripheral surface of syringe urceolus, and the inner peripheral surface of rodless piston contacts with the outer circumference surface of pipe in the syringe; In rodless piston, be provided with first magnet; Pipe has been equipped with the bar piston in the syringe, has the outer circumference surface of the piston end of bar piston to contact with the inner peripheral surface of pipe in the syringe, in the piston end that the bar piston is arranged, is provided with second magnet; First magnet and second magnet attract each other; Offer at least one first passage on the piston end upper surface of bar piston having, on the roof of syringe urceolus, offer at least one second passage, the second passage internal fixation is equipped with the air filtration core.

This utility model asepsis injector, the outer circumference surface of wherein said syringe urceolus roof is provided with annular grip part.

This utility model asepsis injector, has bar piston, rodless piston, annular grip part and air filtration core to process by polyethersulfone resin at wherein said syringe body.Because polyethersulfone resin is high temperature resistant, so this asepsis injector can high-temperature sterilization.

This utility model asepsis injector difference from prior art is that this utility model through in the syringe urceolus of syringe body and syringe, between the pipe rodless piston being set, is provided with first magnet in rodless piston, and through being provided with the bar piston being positioned at the syringe pipe; In the bar piston is arranged, be provided with second magnet, promoting during use has the bar piston, and second magnet attracts first magnet; Move up and down at the syringe urceolus thereby drive rodless piston, because the annular space between the pipe is enclosed space in syringe urceolus and the syringe except second passage and liquid outlet; And the second passage internal fixation is equipped with the air filtration core, and liquid outlet is taken over through entry needle and is connected with entry needle, so the annular space between the pipe is a sterilized space in syringe urceolus and the syringe; Therefore this asepsis injector can be used for aseptic injection; And this asepsis injector is simple in structure, compact, does not have airway, and stability is high; Easy and simple to handle, one hand can use.

Below in conjunction with accompanying drawing this utility model is described further.

Description of drawings

Fig. 1 is the front view of a kind of asepsis injector of prior art;

Fig. 2 looks cutaway view for the master of this utility model asepsis injector.

The specific embodiment

As shown in Figure 2, a kind of asepsis injector of this utility model comprises syringe body 1 and bar piston 2 is arranged; Wherein syringe body 1 comprises that pipe 3, syringe urceolus 4 and entry needle take over 5 in the syringe, offers through hole 6 on the roof of syringe urceolus 4, offers liquid outlet 7 on the diapire of syringe urceolus 4; Liquid outlet 7 is taken over 5 with the entry needle that is fixedly mounted on syringe urceolus 4 diapires and is communicated with; Pipe 3 is positioned at syringe urceolus 4 in the syringe, and pipe 3 lower ends are fixedly connected with syringe urceolus 4 diapires in the syringe, and the upper end of pipe 3 is fixedly connected with through hole 6 hole walls of the roof of syringe urceolus 4 in the syringe; Liquid outlet 7 is positioned at outside the syringe pipe 3; Circular rodless piston 8 is installed in the syringe urceolus 4, and the outer circumference surface of rodless piston 8 contacts with the inner peripheral surface of syringe urceolus 4, and the inner peripheral surface of rodless piston 8 contacts with the outer circumference surface of pipe 3 in the syringe; In rodless piston, be provided with first magnet 9; Pipe 3 has been equipped with bar piston 2 in the syringe, has the outer circumference surface of the piston end 11 of bar piston 2 to contact with the inner peripheral surface of pipe 3 in the syringe, in the piston end that bar piston 2 is arranged 11, is provided with second magnet 10; First magnet 9 and second magnet 10 attract each other, and first magnet 9 and second magnet 10 are made by high temperature resistant neodymium-iron-boron magnetic material.On the piston end that bar piston 2 is arranged 11 upper surfaces, offer one first passage 12, on the roof of syringe urceolus 4, offer one second passage, 13, the second passages, 13 internal fixation air filtration core 15 is installed.The outer circumference surface of syringe urceolus 4 roofs is provided with annular grip part 14.Syringe body 1, there are bar piston 2, rodless piston 8, annular grip part 14 and air filtration core 15 to process by polyethersulfone resin.

This utility model in use; At first the entry needle of the asepsis injector of high-temperature sterilization installs injection needle on taking over; Drawn the bar piston then; There is the bar piston to drive to be in syringe urceolus and the syringe and moves on the rodless piston in the annular space between the pipe, in the annular space between the pipe in medicinal liquid inhalation syringe urceolus to be injected and the syringe through magnetic force.The purpose that first passage and second passage wherein are set is in order to prevent to hinder because of negative pressure the motion of bar piston and rodless piston.When needs are injected, only need to promote to have the bar piston downwards, rodless piston moves down under magnetic force drives, and can realize the injection of medicinal liquid.

Above-described embodiment describes the preferred implementation of this utility model; Be not that scope to this utility model limits; Under the prerequisite that does not break away from this utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of this utility model all should fall in the definite protection domain of this utility model claims.

Claims

1. asepsis injector; Comprise syringe body (1) and bar piston (2) is arranged; It is characterized in that: said syringe body (1) comprises that pipe (3), syringe urceolus (4) and entry needle are taken over (5) in the syringe, offers through hole (6) on the roof of said syringe urceolus (4), offers liquid outlet (7) on the diapire of syringe urceolus (4); Said liquid outlet (7) is taken over (5) with the entry needle that is fixedly mounted on syringe urceolus (4) diapire and is communicated with; Pipe (3) is positioned at syringe urceolus (4) in the said syringe, and pipe (3) lower end is fixedly connected with syringe urceolus (4) diapire in the syringe, and the upper end of pipe (3) is fixedly connected with through hole (6) hole wall of the roof of syringe urceolus (4) in the syringe; Said liquid outlet (7) is positioned at outside the syringe pipe (3); Circular rodless piston (8) is installed in the said syringe urceolus (4), and the outer circumference surface of said rodless piston (8) contacts with the inner peripheral surface of syringe urceolus (4), and the inner peripheral surface of said rodless piston (8) contacts with the outer circumference surface of pipe (3) in the syringe; In rodless piston, be provided with first magnet (9); Pipe (3) has been equipped with bar piston (2) in the said syringe, and said have the outer circumference surface of the piston end (11) of bar piston (2) to contact with the inner peripheral surface of pipe (3) in the syringe, in the piston end that bar piston (2) are arranged (11), is provided with second magnet (10); First magnet (9) and second magnet (10) attract each other; On the piston end that bar piston (2) are arranged (11) upper surface, offer at least one first passage (12), on the roof of syringe urceolus (4), offer at least one second passage (13), said second passage (13) internal fixation is equipped with air filtration core (15).

2. asepsis injector according to claim 1 is characterized in that: the outer circumference surface of said syringe urceolus (4) roof is provided with annular grip part (14).

3. asepsis injector according to claim 2 is characterized in that: said syringe body (1), have bar piston (2), rodless piston (8), annular grip part (14) and air filtration core (15) to process by polyethersulfone resin.