CN110812228A

CN110812228A - Precision filtering injector

Info

Publication number: CN110812228A
Application number: CN201911253153.6A
Authority: CN
Inventors: 罗永东; 张校康; 王芳; 王小虎; 田耀能
Original assignee: HUNAN PINGAN MEDICAL DEVICES TECHNOLOGY Co Ltd
Current assignee: HUNAN PINGAN MEDICAL DEVICES TECHNOLOGY Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-02-21

Abstract

Precision filtration syringe, including the cylinder, be equipped with the push rod in the cylinder, the push rod anterior segment is equipped with the piston, is equipped with into discharge gate on the cylinder, is equipped with filter equipment between discharge gate and the piston, filter equipment on be equipped with closed switch, filter equipment includes that first filtration piece and second filter the piece, first filtration piece and second filter and control the setting, first filtration piece and second filter and be equipped with the division board between the piece, closed switch is close to the first closed switch on one side of the piston including setting up on first filtration piece to and set up the second closed switch that is close to on the second filtration piece on one side of discharge gate. According to the precision injector with the filtering function, the filtering device is arranged between the material inlet and the material outlet and the piston, so that particles such as bottle stopper scraps or glass powder mixed in the liquid medicine are filtered by the filtering device when the liquid medicine enters the needle cylinder, the purity of the liquid medicine is ensured, and the potential safety hazard during infusion is eliminated.

Description

Precision filtering injector

Technical Field

The invention relates to the technical field of medical instruments, in particular to a precise filtering injector.

Background

In the clinical injection, a syringe is generally adopted to suck liquid medicine and then inject, and related liquid medicine is not filtered. The existing liquid medicine is mostly packaged in a glass bottle, when a rubber plug in the glass bottle is punctured by an injector or the glass bottle is cut by a grinding wheel to extract the liquid medicine, particles such as bottle stopper scraps or glass powder and the like are mixed in the liquid medicine; in addition, the insoluble particles are easily generated in the drug solution due to reasons such as improper preservation of artificial drugs and operational errors. In the process of dosing treatment, particles and sediments which are not easy to be detected by naked eyes can be mixed into the liquid medicine along with the needle head of the syringe, so that potential safety hazards of transfusion are caused.

Therefore, how to design a syringe with a filtering function is a problem which needs to be solved urgently in the field.

Disclosure of Invention

The invention aims to: a precision filtration syringe having a filtration function is provided.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

precision filtration syringe, including the cylinder, the cylinder in be equipped with the push rod, the push rod anterior segment be equipped with piston, its characterized in that: the cylinder on be equipped with into discharge gate, into discharge gate and piston between be equipped with filter equipment, filter equipment on be equipped with closed switch, filter equipment include that first filtration piece and second filter the piece, first filtration piece and second filter and control the setting, first filtration piece and second filter and be equipped with the division board between the piece, closed switch including setting up the first closed switch that is close to piston one side on first filtration piece to and set up the second closed switch that is close to into discharge gate one side on the second filtration piece.

Further, the first filter element and the second filter element are both arranged as 5-micron precise filter membranes.

Furthermore, the first closing switch and the second closing switch are both set as one-way valves.

Furthermore, a push plate is arranged at one end of the push rod, which is far away from the piston.

Furthermore, the push plate is provided with anti-skid lines.

Furthermore, the needle cylinder on keep away from piston one end be equipped with handheld portion, handheld portion be the ring type.

Further, the material inlet and the material outlet are arranged on one side of the first filter member.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

according to the precision injector with the filtering function, the filtering device is arranged between the material inlet and the material outlet and the piston, so that particles such as bottle stopper scraps or glass powder mixed in the liquid medicine are filtered by the filtering device when the liquid medicine enters the needle cylinder, the purity of the liquid medicine is ensured, and the potential safety hazard during infusion is eliminated.

Drawings

FIG. 1 is a schematic view of a precision filtration syringe according to the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the drawings: 1-a needle cylinder; 2-a push rod; 3-a piston; 4-feeding and discharging; 5-a cavity; 6-a first filter element; 7-a second filter element; 8-a first closed switch; 9-a second closed switch; 10-a separation plate.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

The utility model provides a precision filtration syringe, includes cylinder 1, is equipped with push rod 2 in the

cylinder

1, and 2 anterior segments of push rod are equipped with

piston

3, and 3 fixed connection of piston are equipped with into discharge gate 4 on the cylinder 2 on the

push rod

2, and 4 ports of discharge gate are used for installing the syringe needle, are equipped with filter equipment between discharge gate 4 and the piston 3, filter equipment on be equipped with closed switch. In this embodiment, the push rod 2 is provided with a push plate at an end away from the piston 3. Be equipped with anti-skidding line on the push pedal, make things convenient for the staff to promote push rod 2. In this embodiment, a hand-held portion is disposed on the end of the syringe 1 away from the piston 3, and the hand-held portion is circular. A cavity 5 is formed among the inner wall of the syringe 1, the piston 3 and the filtering device and is used for storing liquid medicine.

In this embodiment, the filtering device includes the first filter element 6 and the second filter element 7, the first filter element 6 and the second filter element 7 are disposed on the left and right sides, in this embodiment, the material inlet and outlet port 4 is disposed on the first filter element 6 side, the first filter element 6 and the second filter element 7 are disposed with the isolation board 10 therebetween, the closing switch includes the first closing switch 8 disposed on the first filter element 6 side close to the piston 3, and the second closing switch 9 disposed on the second filter element 7 side close to the material inlet and outlet port 4.

In the present embodiment, the first filter member 6 and the second filter member 7 are each provided as a 5 μm microfiltration membrane.

In the present embodiment, the first closing switch 8 and the second closing switch 9 are both configured as one-way valves.

The working principle is as follows: firstly, inserting a feed and discharge port 4 of an injector into a liquid medicine, then driving a push rod 2 to move towards one end far away from the feed and discharge port 4, driving a piston 3 to move towards one end far away from the feed and discharge port 4, along with the movement of the piston 3, the volume of a cavity 5 is larger and larger, in the process, a first closing switch 8 is opened, a second closing switch 9 is closed, and the liquid medicine sequentially passes through the feed and discharge port 4, the first closing switch 8 and a first filter element and enters the cavity 5; after the liquid medicine is inhaled fully, prick the syringe needle into the place that needs to be infused, then drive push rod 2 and move toward being close to business turn over material mouth 4 one end, drive piston 3 and move toward being close to business turn over material mouth 4 one end, along with the removal of piston 3, the volume of cavity 5 is littleer and more, and at this in-process, first closed switch 8 closes, and second closed switch 9 opens, and the liquid medicine loops through second filter piece 7, second closed switch 9 and business turn over material mouth 4 and pours into to the place that needs to be infused.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. Precision filtration syringe, it includes the cylinder, the cylinder in be equipped with the push rod, the push rod anterior segment be equipped with piston, its characterized in that: the cylinder on be equipped with into discharge gate, into discharge gate and piston between be equipped with filter equipment, filter equipment on be equipped with closed switch, filter equipment include that first filtration piece and second filter the piece, first filtration piece and second filter and control the setting, first filtration piece and second filter and be equipped with the division board between the piece, closed switch including setting up the first closed switch that is close to piston one side on first filtration piece to and set up the second closed switch that is close to into discharge gate one side on the second filtration piece.

2. The microfiltration syringe of claim 1 wherein the first and second filters are each configured as 5 micron microfiltration membranes.

3. The microfiltration syringe of claim 1 wherein the first and second closure switches are each a one-way valve.

4. The microfiltration syringe of claim 1 wherein the end of the plunger remote from the piston is provided with a push plate.

5. The precise filtration syringe of claim 4, wherein the push plate is provided with anti-slip threads.

6. The precise filtration injector of claim 1, wherein a hand-held portion is disposed on the end of the barrel distal from the piston, the hand-held portion being circular.

7. The precision filter syringe of claim 1, wherein the feed and discharge port is disposed on a side of the first filter element.