CN101474431B

CN101474431B - Suction device

Info

Publication number: CN101474431B
Application number: CN2008100692134A
Authority: CN
Inventors: 陈伟强
Original assignee: Individual
Current assignee: Zhao Zhiping
Priority date: 2008-01-02
Filing date: 2008-01-02
Publication date: 2011-02-16
Anticipated expiration: 2028-01-02
Also published as: CN101474431A

Abstract

The invention discloses an absorbing device which comprises a syringe, a piston which is arranged in the syringe and is provided with a pushing rod and an absorbing port which is arranged at the front end part of the syringe. The absorbing device is characterized in that a one-way valve is arranged at a position for connecting the front end of the syringe and the absorbing port. A spring is arranged between the one-way valve and the piston. A one-way valve is arranged between the piston and the back end part of the syringe. Compared with the prior art, the absorbing device has the advantages of convenient using and large absorbing capacity.

Description

A kind of extractor

Technical field:

The present invention relates to a kind of medical treatment device, particularly a kind of device of from wound, drawing venom.

Background technology:

After people are by venom, do not having under the situation of drug treating in actual life, common processing method is that venom is drawn out, and when drawing venom, or the mode of taking to push extrudes venom, or with a mouthful absorption.When venom being extruded, easily venom is oppressed in the blood vessel of depth layer, be easy to generate the secondary injury on the contrary with fashion of extrusion; When drawing, produce injury to inhaling taker easily with mouth.So, the applicant has designed a kind of extractor in 2004, it is to be made of syringe, the tubular push rod that has piston, the suction port that are arranged in the syringe, the front end mouth of pipe of push rod passes piston, the back-end sealing of push rod is fixed in the push pedal, push rod seal is actively socketed on the rear end cap of syringe, and suction port is connected in the outlet of syringe, is provided with perforation and communicates with the endoporus of bar on the outer surface of the bar of the rear end of push rod.During use, the pulling push rod, make piston be positioned at the rear end of syringe, suction port is pushed, be sealed in around the wound, wound is sealed in the suction port, then, promote push rod, make piston toward syringe outlet motion, like this, in the process of piston advances forward, air between piston and suction port is discharged outside the syringe by perforation, simultaneously, forms vacuum between piston and the syringe end, behind piston arrives syringe front end, between the perforation of push rod end entered piston and syringe end in the syringe and in syringe, like this, the space between piston and the syringe end was by perforation, the push rod endoporus is identical with suction port, because between piston and the syringe end is to be in vacuum state, like this, suction port forms negative pressure under the absorption of vacuum, suction port plays the effect of absorption, and the venom in the wound is drawn out.This kind extractor just begins to draw in the time of will arriving the syringe end owing to piston, and this moment is because syringe end and the few of space of piston space like this, are very restricted the amount of the absorption venom of syringe.

Summary of the invention:

Goal of the invention of the present invention is both easy to use, simultaneously, and the extractor that uptake is big.

The present invention realizes like this, comprise syringe, be arranged on the piston that has push rod in the syringe, be positioned at the suction port of syringe leading section, its special feature is to be provided with check valve at syringe leading section and suction port connecting place, be provided with spring at check valve and piston space, between piston and back end of syringe portion, be provided with check valve.During use, suction port is pushed, be sealed in around the wound, wound is sealed in the suction port, then, promote push rod forward, make the nose motion of piston to syringe, close under the effect of the air pressure of the check valve of syringe leading section and suction port connecting place in the air pressure syringe, the one-way valve opens between piston and back end of syringe portion, the Compressed Gas in the syringe is discharged outside the syringe by the check valve between piston and back end of syringe portion, when treating that piston moves to the syringe leading section, unclamp push rod, under the effect of spring, piston is toward the motion of back end of syringe portion, make syringe leading section and piston space in the syringe form negative pressure, at this moment, the one-way valve opens of syringe leading section and suction port connecting place, the closed check valve between piston and back end of syringe portion, because between piston and the syringe end is to be in vacuum state, like this, suction port forms negative pressure under the absorption of vacuum, suction port plays the effect of absorption, and the venom in the wound is drawn out.

Here, in order to adapt to the treatment requirement of human body diverse location, suction port can be circular, can be oval.

Here, the check valve of syringe leading section and suction port connecting place is made of the valve port that is arranged on the syringe leading section, the film that covers on valve port, the middle part of valve port is provided with the film locating piece, locating piece links to each other with port wall by cross structure, the middle part of film is provided with fixed leg, and film is fixed on the locating piece by fixed leg.During use, promote push rod, make piston when the nose motion of syringe when forward, under the effect of air pressure, membrane cover is on valve port, with valve closing, like this, the air in the syringe can only be discharged outside the syringe, when the effect lower push-rod at spring moves backward by the check valve between piston and back end of syringe portion, make piston when the back end motion of syringe, form negative pressure in the syringe, like this, film is raised, valve open, under the effect that suction port is drawn, the venom in the wound is drawn out and is entered in the syringe.

Check valve between piston and back end of syringe portion is open taper piston, the uncovered back end of syringe portion that faces toward of open taper piston.During work, promote push rod when forward, because the direction of motion of the piston that push rod drove is identical with the direction that diminishes of the awl of piston, piston can not abut against on the needle cylinder wall, like this, under the effect of air pressure, the tapering of piston diminishes, produce the gap between piston and needle cylinder wall, discharge outside the syringe in the gap that gas just can pass between piston and needle cylinder wall; When moving under the effect of push rod at spring backward, because the direction of motion of the piston that push rod drove is opposite with the direction that diminishes of the awl of piston, piston is abutted against on the needle cylinder wall, and, negative pressure in the syringe also makes piston abut against on the needle cylinder wall, the gas of outside just can not enter in the syringe by piston and needle cylinder wall junction, guarantees to form in the syringe stable negative pressure.

The present invention compared with the prior art, have both easy to use, simultaneously, uptake big advantage.

Description of drawings:

Fig. 1 is a structural representation of the present invention.

The specific embodiment:

Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:

As shown in the figure, the present invention includes syringe 1, be arranged on the piston that has push rod 23 in the syringe 1, be positioned at the suction port 4 of syringe 1 leading section 1 a, its special feature is to be provided with check valve 5 at syringe 1 leading section 1a and suction port 4 connecting places, be provided with spring 6 at check valve 5 and 3 in piston, between piston 3 and syringe 1 rearward end 1b, be provided with check valve 7.Suction port 4 can be circular, can be oval.The check valve 5 of syringe 1 leading section 1a and suction port 4 connecting places is made of the valve port 5a that is arranged on syringe 1 leading section 1a, the film 5b that covers on valve port 5a, the middle part of valve port 5a is provided with film locating piece 5c, locating piece 5c links to each other with the wall of valve port 5a by cross structure 5d, the middle part of film 5b is provided with fixed leg 5e, and film 5b is fixed on the locating piece 5c by fixed leg 5e.Front end in syringe 1 is provided with spring locating slot 8, and spring locating slot 8 is positioned at the outside of valve port 5a.For film 5b can be close on the valve port, film 5b one has the peviform thing of closed circle 5b1.Check valve 7 between piston 3 and syringe 1 rearward end 1b is open taper pistons 3, and the uncovered 3a of open taper piston 3 is facing to syringe 1 rearward end 1b.Be provided with holddown groove 3b in the taper piston cavity of uncovered 3a, push rod 2 ends of corresponding holddown groove 3b are provided with and embed ring 2a, embed ring 2a and are arranged on the holddown groove 3b.The push rod 2 of piston 3 back is provided with baffle ring 9.Be provided with the block 10 that has spring location plush copper 10a in the termination of piston 3, so that with spring 6 location.Syringe 1 is threaded by preceding syringe 1c, the back syringe 1d that has a wing plate 1e and forms.

Claims

1. extractor, comprise syringe, be arranged on the piston that has push rod in the syringe, be positioned at the suction port of syringe leading section, it is characterized in that being provided with check valve at syringe leading section and suction port connecting place, be provided with spring at check valve and piston space, between piston and back end of syringe portion, be provided with check valve, the check valve of syringe leading section and suction port connecting place is by the valve port that is arranged on the syringe leading section, the film that covers on valve port constitutes, the middle part of valve port is provided with the film locating piece, locating piece links to each other with port wall by cross structure, the middle part of film is provided with fixed leg, and film is fixed on the locating piece by fixed leg.

2. extractor according to claim 1 is characterized in that suction port can be circular, can be oval.

3. extractor according to claim 2 is characterized in that film is one to have the peviform thing of closed circle.

4. according to claim 1 or 2 or 3 described extractors, it is characterized in that the check valve between piston and back end of syringe portion is open taper piston, the uncovered back end of syringe portion that faces toward of open taper piston.

5. extractor according to claim 4 is characterized in that being provided with holddown groove in the open taper piston cavity, and the push rod end of corresponding holddown groove is provided with and embeds ring, embeds ring and is arranged on the holddown groove.

6. extractor according to claim 5 is characterized in that the push rod of piston back is provided with baffle ring.

7. extractor according to claim 1 and 2, it is characterized in that the front end in syringe is provided with the spring locating slot, the spring locating slot is positioned at the outside of valve port, be provided with the block that has spring location plush copper in the termination of piston, syringe is threaded by preceding syringe, the back syringe that has a wing plate and forms.