CN213100061U

CN213100061U - Precise filtering injector

Info

Publication number: CN213100061U
Application number: CN202020657242.9U
Authority: CN
Inventors: 严立展; 胡科明
Original assignee: Hantech Medical Device Co ltd
Current assignee: Hantech Medical Device Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-05-04
Anticipated expiration: 2030-04-26

Abstract

The utility model discloses a precise filtration syringe, it can carry out the first filtration to the medicament through first filtration membrane when inhaling the medicament in the cylinder, and when squeezing into the medicament in the cylinder in the human body, can carry out the second filtration to the medicament through second filtration membrane. The utility model discloses the filter effect to injection medicament is better.

Description

Precise filtering injector

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a precise filtering injector.

Background

The injector generally comprises a syringe, a piston and a push rod, wherein the front end of the syringe is provided with a needle seat which is used for inserting an injection needle, the piston is arranged in the syringe, the front end of the push rod is connected with the piston, and the piston can be driven by the push rod to move back and forth in the syringe.

Some current injectors may be provided with a filtering device in the syringe so that impurities in the medicine can be removed when the medicine is injected, however, the current filtering device generally has a poor filtering effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a precise filtering injector is provided, which has better filtering effect on the injected medicament.

In order to solve the technical problem, the utility model provides a precision filtration syringe, it includes:

a syringe;

the needle seat is arranged at the front end of the needle cylinder, and a through hole for liquid to flow through is arranged in the needle seat;

the piston is arranged in the needle cylinder;

the push rod is connected with the piston;

the syringe is internally provided with a filtering device which comprises a cylindrical seat body, the seat body and the syringe are coaxially arranged, the peripheral wall of the seat body is in sealing contact with the inner wall of the syringe, one end surface of the seat body, far away from the needle seat, is provided with a first groove and a second groove, the seat body is internally provided with a first channel communicated with the first groove, a second channel communicated with the second groove and a third channel, the first channel and the second channel are both communicated with one end of the third channel, the other end of the third channel extends to one end surface of the seat body, close to the needle seat, a first filtering membrane is arranged in the first groove, the peripheral edge of the first filtering membrane is in sealing contact with the groove wall of the first groove, a second filtering membrane is arranged in the second groove, the peripheral edge of the second filtering membrane is in sealing contact with the groove wall of the second groove, and a first one-way valve enabling liquid to flow from the third channel to the first channel is arranged in the first channel, and a second one-way valve which enables liquid to flow from the second channel to the third channel in a one-way mode is arranged in the second channel.

Preferably, the first groove and the second groove are both circular grooves, and the first filtering membrane and the second filtering membrane are both circular.

Preferably, the first channel and the third channel, and the second channel and the third channel are connected through arc-shaped channels.

Preferably, the push rod is detachably connected with the piston.

Preferably, the piston is provided with a mounting hole, and the front end of the push rod is screwed in the mounting hole.

After the structure more than adopting, compared with the prior art, the utility model, have following advantage:

the utility model discloses a precision filtration syringe, it is when inhaling the medicament in the cylinder, can carry out the first filtration to the medicament through first filtration membrane, and when squeezing into the medicament in the cylinder in the human body, can carry out the second filtration to the medicament through second filtration membrane to twice filtration has been carried out to the medicament, thereby makes the filter effect to the medicament better.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the structure of the filter device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the precise filtering injector of the present invention includes a syringe 10, a needle holder 20, a piston 30 and a push rod 40.

The needle seat 20 is arranged at the front end of the needle cylinder 10, the needle seat 20 and the needle cylinder 10 are integrally formed, and a through hole 21 for liquid to flow through is arranged in the needle seat 20.

The piston 30 is disposed in the syringe 10, and the piston 30 can slide back and forth along the axial direction of the syringe 10.

The push rod 40 is connected to the piston 30 such that the piston 30 can be driven by the push rod 40 to slide in the syringe 10 to suck the medicine into the syringe and inject the medicine in the syringe into a human body.

The syringe 10 is internally provided with a filtering device which comprises a cylindrical seat body 50, the seat body 50 and the syringe 10 are coaxially arranged, the peripheral wall of the seat body 50 is in sealing contact with the inner wall of the syringe 10, namely, liquid cannot flow between the seat body 50 and the inner wall of the syringe 10, an end surface of the seat body 50 far away from the needle seat 20 is provided with a first groove 51 and a second groove 55, the seat body 50 is internally provided with a first channel 53 communicated with the first groove 51, a second channel 56 communicated with the second groove 55 and a third channel 57, the third channel 57 is communicated with the through hole 21, the first channel 53 and the second channel 56 are both communicated with one end of the third channel 57, the other end of the third channel 57 extends to one end surface of the seat body 50 close to the needle seat 20, the first groove 51 is internally provided with a first filtering membrane 52, the peripheral edge of the first filtering membrane 52 is in sealing contact with the groove wall of the first groove 51, a second filtering membrane 54 is arranged in the second groove 55, the peripheral edge of the second filtering membrane 54 is in sealing contact with the groove wall of the second groove 55, a first one-way valve 58 enabling liquid to flow from the third channel 57 to the first channel 53 in a one-way mode is arranged in the first channel 53, a second one-way valve 59 enabling liquid to flow from the second channel 56 to the third channel 57 in a one-way mode is arranged in the second channel 56, and thus, when the medicament is inhaled into the syringe, the medicament enters the third channel 57 through the through hole 21 of the needle holder 20, the medicament then flows through the first passageway 53 into the cartridge 10, where the first filter 52 may filter the medicament a first time, then, when the medicine in the syringe is injected into the human body, the medicine in the syringe enters the third passage 57 through the second passage 56, and then through the needle of the needle holder into the body, where the second filtering member 54 may perform a second filtering of the medicament.

The first groove 51 and the second groove 55 are both circular grooves, and the first filter membrane 52 and the second filter membrane 54 are both circular grooves, so that the first filter membrane 52 can be easily fixed in the first groove 51, and the second filter membrane 54 can be easily fixed in the second groove 55.

The first channel 53 and the third channel 57 and the second channel 56 and the third channel 57 are connected through the arc-shaped channel 501, so that the arc-shaped channel 501 causes less resistance to the medicine flowing from the third channel 57 into the first channel 53 and the medicine flowing from the second channel 56 into the third channel 57.

The push rod 40 is detachably connected with the piston 30, and specifically, the piston 30 is provided with an installation hole, and the front end of the push rod 40 is screwed in the installation hole, so that the push rod 40 and the piston 30 can be detached, and the piston 30 or the push rod 40 can be replaced conveniently.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, but should not be construed as limiting the claims, and the present invention is not limited to the above-described embodiments, but may be modified in various ways. In summary, all changes that can be made within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. A precision filtration syringe comprising:

a needle cylinder (10);

the needle seat (20) is arranged at the front end of the needle cylinder (10), and a through hole (21) for liquid to flow through is arranged in the needle seat (20);

the piston (30), the said piston (30) is set up in the syringe (10);

a push rod (40), wherein the push rod (40) is connected with the piston (30);

the method is characterized in that: a filtering device is arranged in the needle cylinder (10), the filtering device comprises a cylindrical seat body (50), the seat body (50) and the needle cylinder (10) are coaxially arranged, the peripheral wall of the seat body (50) is in sealing contact with the inner wall of the needle cylinder (10), a first groove (51) and a second groove (55) are arranged on one end surface of the seat body (50) far away from the needle seat (20), a first channel (53) communicated with the first groove (51), a second channel (56) communicated with the second groove (55) and a third channel (57) are arranged in the seat body (50), the first channel (53) and the second channel (56) are both communicated with one end of the third channel (57), the other end of the third channel (57) extends to one end surface of the seat body (50) close to the needle seat (20), a first filtering membrane (52) is arranged in the first groove (51), the peripheral edge of the first filtering membrane (52) is in sealing contact with the groove wall of the first groove (51), a second filtering membrane (54) is arranged in the second groove (55), the peripheral edge of the second filtering membrane (54) is in sealing contact with the groove wall of the second groove (55), a first one-way valve (58) enabling liquid to flow in one direction from the third channel (57) to the first channel (53) is arranged in the first channel (53), and a second one-way valve (59) enabling liquid to flow in one direction from the second channel (56) to the third channel (57) is arranged in the second channel (56).

2. A microfiltration syringe according to claim 1 wherein the first recess (51) and the second recess (55) are both circular recesses and the first filter (52) and the second filter (54) are both circular.

3. The microfiltration syringe of claim 2 wherein the first channel (53) and the third channel (57) and the second channel (56) and the third channel (57) are connected by an arc-shaped channel (501).

4. A precision filter syringe according to claim 3, wherein the plunger (40) is removably connected to the piston (30).

5. A precision filter syringe according to claim 4, characterised in that the plunger (30) is provided with a mounting hole in which the forward end of the push rod (40) is screwed.