CN110812605A

CN110812605A - Precise filtering injector

Info

Publication number: CN110812605A
Application number: CN201911246282.2A
Authority: CN
Inventors: 田耀能
Original assignee: HUNAN PINGAN MEDICAL DEVICES TECHNOLOGY Co Ltd
Current assignee: HUNAN PINGAN MEDICAL DEVICES TECHNOLOGY Co Ltd
Priority date: 2019-12-08
Filing date: 2019-12-08
Publication date: 2020-02-21

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a precise filtering injector which comprises a jacket, a filtering device, a filtering membrane fixing device and a push rod, wherein a needle seat is arranged at one end of the jacket; the filtering device comprises a mounting piece and a precise filtering membrane, and the precise filtering membrane is fixed on the mounting piece. The invention has the beneficial effects that: through filter equipment, carry out the secondary filter with the liquid medicine automatically, reduced the risk of patient infection, alleviateed medical personnel's working strength.

Description

Precise filtering injector

Technical Field

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

Background

The advent of syringes has been an epoch-making revolution in the medical device field, and the process of drawing or injecting gas or liquid with a needle is called injection. Syringes have been widely used clinically, and prior syringes have consisted of a barrel with a small bore at the front end and a matching plunger core pin to inject small amounts of liquid or other injectate into or out of otherwise inaccessible areas, drawing liquid or gas through the bore at the front end of the barrel as the core pin is withdrawn, and forcing liquid or gas out as the core pin is pushed in.

The conventional injector or medicine dispenser is usually used for directly injecting a human body or dispensing medicine after sucking liquid medicine, a medicine storage container or external foreign matters are not effectively removed, the phenomenon of blocking transfusion is easy to occur, and even the condition of influencing the health of a patient is caused; increasing disputes between doctors and patients and bringing inconvenience to medical care personnel and patients. To this end, we propose a microfiltration syringe.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide a precise filtering injector which has a simple structure and can automatically filter.

The invention adopts the technical scheme that the precise filtering injector comprises a jacket, a filtering device, a filtering membrane fixing device and a push rod, wherein a needle base is arranged at one end of the jacket, the filtering device is arranged at one end, close to the needle base, in the jacket, the filtering device is fixed in the jacket through the filtering membrane fixing device, and the push rod is arranged in the jacket; but filter equipment includes elastically deformable's installation piece and microfiltration membrane, microfiltration membrane fixes on the installation piece.

Furthermore, the mounting piece is provided with a hole, the precise filtering membrane is fixed on the mounting piece and concentrically fixed with the hole, and the area of the precise filtering membrane is larger than that of the hole. The mounting piece and the precise filtering membrane are fused together to form the filtering device.

Further, the mounting piece is a plastic sheet or a thin silicon sheet.

Further, filtration membrane fixing device includes shrouding and inlet, the shrouding fixed mounting in the overcoat, it has to open on the shrouding the inlet.

Furthermore, the liquid inlet is a plurality of liquid inlets, and the plurality of liquid inlets are annularly arranged.

Furthermore, one end, far away from the needle seat, of the push rod extends to the outside of the outer sleeve (1) along the axial direction of the outer sleeve, and the push rod is arranged in the outer sleeve in a sliding mode.

Furthermore, an extending end extending towards the needle seat direction is vertically arranged on the outer edge of the sealing plate. The friction force between the outer sleeve and the inner wall of the outer sleeve is increased, so that the outer sleeve is more stable to mount.

Further, the filtering membrane fixing device is positioned between the filtering device and the push rod.

The working principle of the invention is as follows: the puncture needle arranged on the needle stand is inserted into the liquid medicine, the push rod is pulled, the mounting piece on the filtering device can deform and bend, the mounting piece can be separated from the bottom of the inner cavity wall of the outer sleeve to form a certain gap, and the liquid medicine enters the outer sleeve along with the gap; after the liquid medicine suction is completed, the push rod is pushed outwards, the mounting piece on the filtering device can be tightly attached to the bottom of the inner cavity wall of the outer sleeve, so that the liquid medicine cannot flow out, meanwhile, the precise filtering membrane on the filtering device is extruded inside, and the liquid medicine flows out after being filtered by the precise filtering membrane and enters a human body or an infusion bottle through the puncture needle.

Due to the adoption of the technical scheme, the invention has the following beneficial effects: through filter equipment, carry out the secondary filter with the liquid medicine automatically, reduced the risk of patient infection, alleviateed medical personnel's working strength.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a structural view of a filtering membrane fixing apparatus according to an embodiment of the present invention;

FIG. 3 is a top view of a filtering membrane fixing apparatus according to an embodiment of the present invention;

FIG. 4 is a block diagram of a filter assembly according to an embodiment of the present invention;

FIG. 5 is a top view of a filter assembly according to an embodiment of the present invention.

Description of the drawings: 1-coating; 2-a push rod; 3-a filter membrane fixing device; 31-closing plate; 32-liquid inlet; 4-a filtration device; 41-mounting pieces; 42-a microfiltration membrane; 5-needle seat.

Detailed Description

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

A precise filtering injector comprises an outer sleeve 1, a filtering device 4, a filtering membrane fixing device 3 and a push rod 2.

As shown in fig. 1, one end of the outer sleeve 1 is provided with a needle seat 5, the filtering device 4 is arranged at one end of the outer sleeve 1 close to the needle seat 5, the filtering device 4 is fixed in the outer sleeve 1 through a filtering membrane fixing device 3, the push rod 2 is arranged in the outer sleeve 1, one end of the push rod 2 far away from the needle seat 5 extends to the outside of the outer sleeve 1 along the axial direction of the outer sleeve 1, and the push rod 2 is arranged in the outer sleeve 1 in a sliding manner. The filter membrane fixing device 3 is located between the filter device and the push rod 2.

As shown in fig. 4 and 5, the filtering apparatus includes an elastically deformable mounting plate 41 and a microfiltration membrane 42, the mounting plate 41 is provided with a hole, the microfiltration membrane 42 is fixed on the mounting plate 42, the microfiltration membrane 42 is concentrically fixed with the hole, and the area of the microfiltration membrane 42 is larger than that of the hole. The mounting plate 41 is a plastic sheet or a thin silicone sheet.

As shown in fig. 2 and 3, the filtering membrane fixing device 3 includes a sealing plate 31 and a liquid inlet 32, the sealing plate 31 is fixedly installed in the housing 1, and an extending end extending toward the needle holder 5 is vertically provided on an outer edge of the sealing plate 31. The closing plate 31 is provided with a liquid inlet 32. The liquid inlet 32 is provided with a plurality of liquid inlets 32 which are arranged in a ring shape. In this embodiment, the number of the liquid inlet ports 32 is four.

The working principle of the invention is as follows: the puncture needle arranged on the needle stand 5 is inserted into the liquid medicine, the push rod 2 is pulled, the mounting piece 41 on the filtering device 4 can deform and bend, the mounting piece 41 can be separated from the bottom of the inner cavity wall of the outer sleeve 1 to form a certain gap, and the liquid medicine enters the outer sleeve 1 along with the gap; after the liquid medicine suction is finished, the push rod 2 is pushed outwards, the mounting piece 41 on the filtering device 4 can be tightly attached to the bottom of the inner cavity wall of the outer sleeve 1, so that the liquid medicine can not flow out, meanwhile, the precise filtering membrane 42 on the filtering device 4 is squeezed inside, and the liquid medicine flows out after being filtered by the precise filtering membrane 42 and enters a human body or an infusion bottle through the puncture needle.

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. A precision filtration syringe characterized in that: the needle holder is characterized by comprising an outer sleeve (1), a filtering device (4), a filtering membrane fixing device (3) and a push rod (2), wherein a needle holder (5) is arranged at one end of the outer sleeve (1), the filtering device (4) is arranged at one end, close to the needle holder (5), in the outer sleeve (1), the filtering device (4) is fixed in the outer sleeve (1) through the filtering membrane fixing device (3), and the push rod (2) is arranged in the outer sleeve (1);

the filtering device comprises an elastically deformable mounting piece (41) and a precise filtering membrane (42), wherein the precise filtering membrane (42) is fixed on the mounting piece (41).

2. A precision filtration syringe as claimed in claim 1, wherein: the mounting piece (41) is provided with a hole, the precise filtering membrane (42) and the hole are concentrically fixed, and the area of the precise filtering membrane (42) is larger than that of the hole.

3. A precision filtration syringe as claimed in claim 2, wherein: the mounting piece (41) is a plastic sheet or a thin silicon film.

4. A precision filtration syringe as claimed in claim 1, wherein: filter membrane fixing device (3) are including shrouding (31) and inlet (32), shrouding (31) fixed mounting be in overcoat (1), it has to open on shrouding (31) inlet (32).

5. A precision filtration syringe according to claim 4, wherein: the liquid inlet (32) is a plurality of liquid inlets, and the liquid inlets (32) are annularly arranged.

6. A precision filtration syringe as claimed in claim 1, wherein: one end of the needle seat (5) is kept away from the push rod (2) and axially extends to the outside of the outer sleeve (1), and the push rod (2) is arranged in the outer sleeve (1) in a sliding mode.

7. A precision filtration syringe according to claim 4, wherein: the outer edge of the sealing plate (31) is vertically provided with an extending end extending towards the needle seat (5).

8. A precision filtration syringe as claimed in claim 1, wherein: the filtering membrane fixing device (3) is positioned between the filtering device (4) and the push rod (2).