CN211188585U

CN211188585U - Filter

Info

Publication number: CN211188585U
Application number: CN201920825659.9U
Authority: CN
Inventors: 朱景元; 朱益德
Original assignee: Shanghai Zhenpu Medical Equipment Co ltd
Current assignee: Shanghai Zhenpu Medical Equipment Co ltd
Priority date: 2019-03-27
Filing date: 2019-06-03
Publication date: 2020-08-07
Anticipated expiration: 2029-06-03
Also published as: CN110237367A; CN211486010U; CN110302450A

Abstract

The utility model discloses a filter, include: the upper surface of the lower cover is provided with a first groove, the lower surface of the lower cover is provided with a lower drainage groove, and the first through hole is communicated with the lower drainage groove and the first groove; the left side of the bottom surface of the first groove is lower than the right side of the bottom surface of the first groove; the lower cover is provided with a plurality of lower cover lower diversion holes which are communicated; the lower surface of the lower cover is provided with a plurality of radial channels, one end of each radial channel is communicated with the lower diversion hole of the lower cover on the same side, and the other end of the same radial channel is communicated with the lower diversion groove; the middle part of the upper disc is provided with a through upper cover upper flow guide hole which is communicated to the first groove; the upper wall is provided with a plurality of through upper cover lower flow guide holes which are respectively communicated with a plurality of lower cover lower flow guide holes; the upper wall is provided with a plurality of baffle convex ribs; the first filtering membrane is arranged in the first groove; the second filtering membrane is arranged in the first annular groove; the utility model discloses the air that the stock solution chamber easily got into when the extraction liquid medicine, precision filter's up end is the gas collection evacuation of being convenient for of the conical surface.

Description

Filter

Technical Field

The utility model relates to a technical field of filter especially relates to a technical field of filter.

Background

At present, medicine adding syringes used for intravenous infusion medicine adding are all common syringes which do not have the function of filtering liquid medicine, generally, when medicine is added, rubber particles can be formed after a rubber plug of a liquid medicine bottle is pricked by a needle head and enter the liquid medicine along with the needle head, and particles in the same liquid medicine bottle can also enter the liquid medicine; and the infusion liquid is injected into a human body along with injection, and then enters the inside of the human body through blood, so that pathological changes and tumor changes of internal tissues of the human body are formed, and the harm of infusion liquid particles to the human body is known.

At present, the problem is solved by a precision infusion apparatus using a filter, and the precision infusion apparatus is more expensive than a common injector and has poor filtering effect.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects, the existing design filters the liquid medicine by arranging the micron-sized second filtering membrane, reduces impurities in the liquid medicine and avoids adverse effects on a human body.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a filter, comprising:

the upper surface of the lower cover is provided with a first groove and a first annular groove; the first groove is positioned in the middle of the lower cover, the first annular groove is positioned on the outer side of the first groove, and a first annular bulge is formed between the first annular groove and the first groove; the bottom surface of the first groove is an inclined surface, and the left side of the inclined surface is lower than the right side of the inclined surface; a plurality of lower cover lower flow guide holes are formed in the bottom surface of the first annular groove and penetrate to the lower surface of the lower cover; a lower drainage groove is formed in the lower surface of the lower cover; the conical surface is provided with a plurality of radial channels, one end of each radial channel is communicated with the lower diversion hole of the lower cover on the same side, and the other end of the same radial channel is communicated with the lower diversion groove; a first through hole is formed in the bottom surface of the first groove and penetrates through the lower drainage groove;

the upper cover covers the lower cover; the upper surface of the upper cover is a conical surface, the middle part of the conical surface is provided with an upper cover upper flow guide hole, and the upper cover upper flow guide hole is communicated to the lower surface of the upper cover; the upper surface of the upper cover is also provided with a plurality of upper cover lower flow guide holes which respectively correspond to the lower cover lower flow guide holes; the lower surface of the upper cover is provided with a plurality of baffle sheet convex ribs, and the baffle sheet convex ribs positioned on the left side are higher than the rest baffle sheet convex ribs; the lower surface of the upper cover is also provided with a second annular bulge which is positioned at the outer side of the plurality of baffle convex ribs; the first annular bulges are embedded between the plurality of baffle plate convex ribs and the second annular bulges;

the first filtering membrane is arranged on the bottom surface of the first groove; the lower end of the baffle convex rib positioned on the left side is pressed against the left side of the upper surface of the first filter membrane;

a second filter membrane disposed at a bottom surface of the first annular groove.

The filter, wherein the upper cover further comprises: the two extending parts are positioned on a first straight line, the other two extending parts are positioned on a second straight line, and the first straight line and the second straight line are perpendicular and are in the same plane; one end of each extending part is respectively connected to the inner wall of the upper cover upper flow guide hole, and the other end of the same extending part is provided with an arc-shaped notch; the four arc-shaped notches of the four extending parts are all positioned at the edge of the same circle; and the lower end surface of each extension part is flush with the lower surface of the upper cover.

The filter, wherein the upper cover further comprises: and the four strip-shaped bulges are respectively arranged on the four lower end surfaces of the extension parts.

In the filter, a downward protruding structure is arranged on the left side of the outer edge of the lower surface of the upper cover, and a groove structure is arranged on the left side of the outer edge of the upper surface of the lower cover; the protruding structure is embedded in the groove structure.

The filter, wherein the lower cover further comprises: and the plurality of clamping cylinder bodies are circumferentially arranged on the inner wall of the first groove.

The filter, wherein the lower cover further comprises: the cross structure is arranged in the first through hole, and the left side of the cross structure is lower than the right side of the inclined plane; the cross structure corresponds to four of the extension parts.

The filter is characterized in that the inclined plane is provided with an annular inclined sealing platform, and the inclined sealing platform is padded with the first filter membrane.

In the filter, an inner ring of the bottom surface of the first annular groove is provided with a first annular gasket, and an outer ring of the bottom surface of the first annular groove is provided with a second annular gasket; the inner ring of the second filter membrane is padded on the first annular gasket, and the outer ring of the second filter membrane is padded on the second annular gasket.

The filter is characterized in that the first filter membrane is a nanoscale membrane sheet, and the second filter membrane is a micron-scale membrane sheet.

With above technical scheme, can reach following beneficial effect:

the utility model discloses a first filtration membrane is 10 nanometers, has hydrophilicity and hydrophobicity characteristics, and the gas in the liquid medicine stock solution intracavity of being convenient for at the injection initial stage and the inside unfiltered liquid medicine of precision filter discharge in advance.

The utility model discloses the air that the stock solution chamber easily got into when the extraction liquid medicine, precision filter's up end is the gas collection evacuation of being convenient for of the conical surface.

The lower cover is provided with the inclined sealing platform, and the upper cover is internally provided with a baffle convex rib which extends downwards to abut against one side of the first filtering membrane, so that the first filtering membrane is positioned, and the opening and closing, the air exhaust and the nano-scale filtration of the first filtering membrane are facilitated.

Drawings

FIG. 1 is a cross-sectional view of a filter of the present invention;

FIG. 2 is an enlarged view of A of FIG. 1;

FIG. 3 is an enlarged view of B of FIG. 1;

fig. 4 is a top perspective view of a lower cover of a filter according to the present invention;

FIG. 5 is a top perspective view of a lower cover and a second filter membrane of a filter according to the present invention;

FIG. 6 is a top perspective view of a lower cover and a second filter membrane of a filter according to the present invention;

fig. 7 is a top perspective view of a filter cover according to the present invention;

fig. 8 is a perspective view of the upper cover of the filter according to the present invention viewed from below.

In the drawings:

1. a lower cover; 11. a first groove; 111. a first through hole; 12. a first annular groove; 121. a lower cover lower diversion hole; 122. a first annular gasket; 123. a second annular gasket; 13. a first annular projection; 14. a lower drainage groove; 15. a radial channel; 16. a groove structure; 17. clamping the column body; 18. a cross structure; 19. inclining the sealing platform; 2. an upper cover; 21. the upper cover is provided with a flow guide hole; 22. the upper cover is provided with a lower diversion hole; 23. a baffle convex rib; 24. a second annular projection; 25. an extension portion; 251. an arc-shaped notch; 26. a strip-shaped bulge; 27. a raised structure; 3. a first filter membrane; 4. a second filter membrane.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

FIG. 1 is a cross-sectional view of a filter of the present invention; FIG. 2 is an enlarged view of A of FIG. 1; FIG. 3 is an enlarged view of B of FIG. 1; fig. 4 is a top perspective view of a lower cover of a filter according to the present invention; FIG. 5 is a top perspective view of a lower cover and a second filter membrane of a filter according to the present invention; FIG. 6 is a top perspective view of a lower cover and a second filter membrane of a filter according to the present invention; fig. 7 is a top perspective view of a filter cover according to the present invention; fig. 8 is a perspective view of the upper cover of the filter according to the present invention viewed from below.

Referring to fig. 1 to 8, in a preferred embodiment, a filter includes:

the upper surface of the lower cover 1 is provided with a first groove 11 and a first annular groove 12; the first groove 11 is positioned in the middle of the lower cover 1, the first annular groove 12 is positioned outside the first groove 11, and a first annular bulge 13 is formed between the first annular groove 12 and the first groove 11; the bottom surface of the first groove 11 is an inclined surface, and the left side of the inclined surface is lower than the right side of the inclined surface; a plurality of lower cover lower diversion holes 121 in a circumferential array are formed in the bottom surface of the first annular groove 12, and the lower cover lower diversion holes 121 penetrate through to the lower surface of the lower cover 1; the lower surface of the lower cover 1 is a conical surface, the middle part of the conical surface is provided with a plane, and the plane is provided with a lower drainage groove 14 with a narrow upper part and a wide lower part; the conical surface is provided with a plurality of radial channels 15 in a circumferential array, one end of each radial channel 15 is communicated with the lower cover lower diversion hole 121 on the same side, and the other end of the same radial channel 15 is communicated with the lower diversion groove 14; a first through hole 111 is formed in the bottom surface of the first groove 11, and the first through hole 111 penetrates through the lower drainage groove 14.

The upper cover 2 is covered on the lower cover 1; the upper surface of the upper cover 2 is a conical surface, the middle part of the conical surface is provided with an upper cover upper diversion hole 21, and the upper cover upper diversion hole 21 penetrates through the lower surface of the upper cover 2; the upper surface of the upper cover 2 is also provided with a plurality of upper cover lower diversion holes 22 in a circumferential array, and the plurality of upper cover lower diversion holes 22 respectively correspond to the plurality of lower cover lower diversion holes 121; the lower surface of the upper cover 2 is provided with a plurality of baffle plate convex ribs 23 in a circumferential array, the baffle plate convex ribs 23 surround the upper cover upper diversion holes 21, and the baffle plate convex rib 23 on the left side is higher than the rest baffle plate convex ribs 23; the lower surface of the upper cover 2 is also provided with a second annular bulge 24, and the second annular bulge 24 is positioned at the outer side of the baffle convex ribs 23; the first annular bulge 13 is embedded between the baffle convex ribs 23 and the second annular bulge 24.

A first filter membrane 3, the first filter membrane 3 being disposed on the bottom surface of the first groove 11; the lower end of the stopper rib 23 on the left side abuts against the left side of the upper surface of the first filter membrane 3.

And the second filtering membrane 4 is arranged on the bottom surface of the first annular groove 12, and a gap is reserved between the second filtering membrane 4 and the lower surface of the upper cover 2.

The above is merely an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.

Further, in a preferred embodiment, the upper cover 2 further includes: four extension parts 25, two extension parts 25 are positioned on a first straight line, the other two extension parts 25 are positioned on a second straight line, and the first straight line and the second straight line are vertical and are in the same plane; one end of each extending part 25 is respectively connected with the inner wall of the upper cover upper diversion hole 21, and the other end of the same extending part 25 is provided with an arc-shaped notch 251; the four arc-shaped notches 251 of the four extending parts 25 are all positioned at the edge of the same circle; and the lower end surface of each extension 25 is flush with the lower surface of the upper cap 2.

Further, in a preferred embodiment, the upper cover 2 further includes: four strip-shaped protrusions 26, wherein the four strip-shaped protrusions 26 are respectively arranged on the lower end surfaces of the four extending parts 25.

Further, in a preferred embodiment, a downward convex structure 27 is provided on the left side of the outer edge of the lower surface of the upper cover 2, and a concave structure 16 is provided on the left side of the outer edge of the upper surface of the lower cover 1; the protrusion structure 27 is embedded in the groove structure 16.

Further, in a preferred embodiment, the lower cover 1 further includes: a plurality of clamping columns 17, a plurality of clamping columns 17 are arranged on the inner wall of the first groove 11 (i.e. the first annular protrusion 13) in a circumferential array.

Further, in a preferred embodiment, the lower cover 1 further includes: a cross structure 18, the cross structure 18 being disposed in the first through hole 111, and a thickness of a left side of the cross structure 18 being lower than a thickness of a right side of the cross structure 18; the cross structure 18 corresponds to the four extensions 25.

Further, in a preferred embodiment, an annular inclined sealing platform 19 is arranged on the inclined surface, and the first filter membrane 3 is arranged on the inclined sealing platform 19 in a cushioning manner.

Further, in a preferred embodiment, the inner ring of the bottom surface of the first annular groove 12 is provided with a first annular gasket 122, and the outer ring of the bottom surface of the first annular groove 12 is provided with a second annular gasket 123; the inner ring of the second filter membrane 3 is padded by a first annular gasket 122 and the outer ring of the second filter membrane 3 is padded by a second annular gasket 123.

Further, in a preferred embodiment, the upper surface of the upper cover 2 is a conical surface, so that the conical surface can retain a certain amount of air, thereby helping the syringe to clean the liquid medicine near the needle point through the small amount of air when the piston in the syringe is pushed.

Further, in a preferred embodiment, the first filter membrane 3 is a nano-scale membrane and the second filter membrane 3 is a micro-scale membrane. Specifically, the first filtering membrane 3 has the characteristics of hydrophilicity and hydrophobicity, and is convenient for discharging gas in the liquid storage cavity of the liquid medicine and unfiltered liquid medicine in the built-in liquid medicine filtering device in advance at the initial stage of injection.

In addition to the above embodiments, the present invention further has the following working method:

as shown in fig. 1, when the upper cover 2 and the lower cover 1 are connected, an independent upper flow guide channel and an independent lower flow guide channel are respectively formed; an upper flow guide channel is formed by the lower flow guide groove 14, the first through hole 111, the first groove 11 and the upper cover upper flow guide hole 21; a lower flow guide channel is formed by the conical surface of the upper cover 2, the upper cover lower flow guide hole 22 and the lower cover lower flow guide hole 121;

when sucking the liquid medicine, because the negative pressure of cylinder effect, first filtration membrane 3 upwards opens slightly, and the left side of first filtration membrane 3 can receive the support of left longest separation blade protruding muscle 23 to press this moment, and according to the liquid medicine can be to the direction flow principle to its resistance is little, the liquid medicine can form the space via first recess 11 and remaining separation blade protruding muscle 23 (the protruding muscle 23 of separation blade except left longest separation blade protruding muscle 23) and flow to first recess 11 in, flow to the cylinder in via covering water conservancy diversion hole 21 on the upper cover again, accomplish the action of getting it filled.

When the liquid medicine is injected, the nano-scale filtering membrane of the first filtering membrane 3 is pressed on the inclined sealing platform 19 under the action of the positive pressure of the needle cylinder, so that the liquid medicine and air which are not filtered in the liquid storage cavity (the liquid storage cavity refers to a cavity formed by the lower part of the first filtering membrane 3 and the needle cylinder after the first filtering membrane 3 is sealed) are removed in advance and discarded while the liquid storage cavity is sealed; and the first filtration membrane 3 may perform nano-scale filtration; at this time, the medical solution flows out of the syringe from the conical surface of the upper cover 2, the upper cover lower guide hole 22, the second filtering membrane 4, the lower cover lower guide hole 121, and the radial passage 15 to the lower guide groove 14. As the liquid medicine passes through the second filtering membrane 4 with micron grade, impurities and particles in the liquid medicine which is not filtered can be removed.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. A filter, comprising:

the upper surface of the lower cover is provided with a first groove and a first annular groove; the first groove is positioned in the middle of the lower cover, the first annular groove is positioned on the outer side of the first groove, and a first annular bulge is formed between the first annular groove and the first groove; the bottom surface of the first groove is an inclined surface, and the left side of the inclined surface is lower than the right side of the inclined surface; a plurality of lower cover lower flow guide holes are formed in the bottom surface of the first annular groove and penetrate to the lower surface of the lower cover; a lower drainage groove is formed in the lower surface of the lower cover; a plurality of radial channels are formed in the lower surface of the lower cover, one end of each radial channel is communicated with the lower diversion hole of the lower cover on the same side, and the other end of the same radial channel is communicated with the lower diversion groove; a first through hole is formed in the bottom surface of the first groove and penetrates through the lower drainage groove;

the upper cover covers the lower cover; the upper surface of the upper cover is a conical surface, an upper cover upper flow guide hole is formed in the middle of the conical surface, and the upper cover upper flow guide hole penetrates through the lower surface of the upper cover; the upper surface of the upper cover is also provided with a plurality of upper cover lower flow guide holes which respectively correspond to the lower cover lower flow guide holes; the lower surface of the upper cover is provided with a plurality of baffle sheet convex ribs, and the baffle sheet convex ribs positioned on the left side are higher than the rest baffle sheet convex ribs; the lower surface of the upper cover is also provided with a second annular bulge which is positioned at the outer side of the plurality of baffle convex ribs; the first annular bulges are embedded between the plurality of baffle plate convex ribs and the second annular bulges;

2. The filter of claim 1, wherein the upper cover further comprises: the two extending parts are positioned on a first straight line, the other two extending parts are positioned on a second straight line, and the first straight line and the second straight line are perpendicular and are in the same plane; one end of each extending part is respectively connected to the inner wall of the upper cover upper flow guide hole, and the other end of the same extending part is provided with an arc-shaped notch; the four arc-shaped notches of the four extending parts are all positioned at the edge of the same circle; and the lower end surface of each extension part is flush with the lower surface of the upper cover.

3. The filter of claim 2, wherein the upper cover further comprises: and the four strip-shaped bulges are respectively arranged on the four lower end surfaces of the extension parts.

4. The filter of claim 1, wherein a downward convex structure is provided at a left side of an outer edge of the lower surface of the upper cover, and a concave structure is provided at a left side of an outer edge of the upper surface of the lower cover; the protruding structure is embedded in the groove structure.

5. The filter of claim 1, wherein the lower cover further comprises: and the plurality of clamping cylinder bodies are circumferentially arranged on the inner wall of the first groove.

6. The filter of claim 2, wherein the lower cover further comprises: a cross structure disposed within the through hole and having a thickness on a left side thereof that is lower than a thickness on a right side thereof; the cross structure corresponds to four of the extension parts.

7. The filter of claim 1, wherein the sloped surface is provided with an annular sloped sealing land, and the sloped sealing land is padded with the first filter membrane.

8. The filter of claim 1, wherein the inner ring of the bottom surface of the first annular groove is provided with a first annular gasket, and the outer ring of the bottom surface of the first annular groove is provided with a second annular gasket; the inner ring of the second filter membrane is padded on the first annular gasket, and the outer ring of the second filter membrane is padded on the second annular gasket.