CN215024071U

CN215024071U - Syringe with filtering function

Info

Publication number: CN215024071U
Application number: CN202120576937.9U
Authority: CN
Inventors: 张佳冬; 吴华; 於国军
Original assignee: Jiaxing Zhewai Medical Technology Co ltd
Current assignee: Jiaxing Zhewai Medical Technology Co ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-12-07
Anticipated expiration: 2031-03-22

Abstract

A syringe with a filtering function. The method is characterized in that: the filter comprises a filter device, wherein the filter device comprises a mounting disc, a filter membrane, a first one-way valve and a second one-way valve; the mounting disc is fixedly clamped between the upper needle base and the lower needle base, an upper mounting column protrudes from the center of the upper end of the mounting disc, a lower mounting column protrudes from the center of the lower end of the mounting disc, an annular boss is further arranged at the upper end of the mounting disc, a vertically through liquid inlet hole is formed in the center of the mounting disc, and a plurality of vertically through liquid outlet holes are formed in the position between the annular boss and the upper mounting column on the mounting disc; the filtering membrane is in an annular structure and sleeved on the lower mounting column, and the edge of the filtering membrane is clamped and fixed by the mounting disc and the lower needle seat; the first one-way valve is fixed on the lower mounting column and used for realizing one-way conduction of the liquid inlet hole; the second check valve is fixed between the upper mounting column and the annular boss and used for realizing one-way conduction of the liquid outlet hole. The liquid filling device has the advantages that the filtering effect can be realized, the whole structure is simple, the operation is convenient, impurities are reduced during liquid filling, and the liquid filling device is safer and more reliable.

Description

Syringe with filtering function

Technical Field

The utility model relates to a syringe, concretely relates to take filtering capability's syringe.

Background

As is known, most of the currently used injections are packaged in glass bottles, and when a rubber plug is pricked by a needle of a syringe or a glass bottle is cut by a grinding wheel to extract liquid medicine, bottle stopper scraps or glass powder can enter the injection. The conventional syringe does not have a filtering function, and when liquid medicine is extracted, the impurities are extracted into the syringe and directly injected into a patient, so that diseases such as phlebitis and the like are induced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the background art, the utility model provides a syringe with a filtering function.

The utility model discloses the technical scheme who adopts: a syringe with a filtering function comprises a syringe body, a needle seat and a needle tube, wherein the needle seat comprises an upper needle seat and a lower needle seat; a filtering device is arranged between the upper needle seat and the lower needle seat; the filtering device comprises an installation disc, a filtering membrane, a first one-way valve and a second one-way valve; the mounting disc is fixedly clamped between the upper needle base and the lower needle base, an upper mounting column protrudes from the center of the upper end of the mounting disc, a lower mounting column protrudes from the center of the lower end of the mounting disc, an annular boss is further arranged at the upper end of the mounting disc, a vertically through liquid inlet hole is formed in the center of the mounting disc, and a plurality of vertically through liquid outlet holes are formed in the position between the annular boss and the upper mounting column on the mounting disc; the filtering membrane is of an annular structure and is sleeved on the lower mounting column, and the edge of the filtering membrane is clamped and fixed by the mounting disc and the lower needle seat; the first one-way valve is fixed on the lower mounting column and used for realizing one-way conduction of the liquid inlet hole; and the second one-way valve is fixed between the upper mounting column and the annular boss and is used for realizing one-way conduction of the liquid outlet hole.

One end of the first one-way valve is fixedly sleeved on the lower mounting column, and the other end of the first one-way valve is of a V-shaped structure.

The second check valve includes that the center is solid fixed ring, and the periphery of the solid fixed ring upper end in center is formed with annular sealing ring, the second check valve is established on last erection column through the fixed cover of center fixed ring, sealing ring and the sealed laminating of annular boss.

The sealing ring has a taper and is of an umbrella-shaped structure, and the upper surface of the annular boss is a conical surface matched with the sealing ring.

The height of the upper mounting column is consistent with that of the central fixing ring.

The mounting disc is in interference fit with the upper needle seat through the annular boss.

The inner ring of the upper end of the lower needle base is provided with a mounting groove which is sunken downwards, and the mounting disc is embedded in the mounting groove and is in interference fit with the mounting groove.

The first one-way valve and the second one-way valve are made of elastic rubber.

The utility model has the advantages that: scheme more than adopting, during the extraction liquid medicine, under the effect of negative pressure, first check valve is opened, the second check valve is sealed, the liquid medicine only can get into the syringe body from the feed liquor hole, when the injection liquid medicine, under the effect of pressure, first check valve seals, the second check valve is opened, the liquid medicine passes through filtration membrane filtration back, the rethread goes out liquid hole discharge, realize filterable effect, overall structure is simple not only, convenient operation, reduce impurity moreover, safety and reliability.

Drawings

Fig. 1 is a schematic structural diagram of an injector with a filtering function according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram 1 of a needle holder and a filtering device according to an embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a point a in fig. 2.

Fig. 4 is a schematic view of the flow direction of the liquid medicine during the liquid medicine extraction according to the embodiment of the present invention.

Fig. 5 is a schematic view of the flow direction of the liquid medicine when the liquid medicine is injected according to the embodiment of the present invention.

Fig. 6 is a schematic structural diagram 2 of a needle holder and a filtering device according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in the figures, the syringe with the filtering function comprises a syringe body 1, a needle seat 2, a needle tube 3 and a filtering device 4, wherein the needle seat 2 comprises an upper needle seat 21 and a lower needle seat 22, a cavity for installing the filtering device 4 is formed between the upper needle seat 21 and the lower needle seat 22, and the filtering device 4 comprises an installation disc 41, a filtering film 42, a first one-way valve 43 and a second one-way valve 44.

Mounting disc 41 is the disc shape, mounting disc 41 upper end center protrusion has last erection column 411, and lower extreme center protrusion has down erection column 412, mounting disc 41 up end still is equipped with annular boss 413, the feed liquor hole 414 that link up about mounting disc 41 center is equipped with, the inflow passageway when as the extraction liquid medicine, position between annular boss 413 and the last erection column 411 on mounting disc 41 is equipped with a plurality of circumference equipartitions and goes out liquid hole 415 that link up from top to bottom, outflow passageway when as the injection liquid medicine.

The filtering membrane 42 is of an annular structure and sleeved on the lower mounting column 412, and is attached to the lower end surface of the mounting plate 41 to form a complete cover for the liquid outlet holes 415, so that when the injection liquid medicine flows out, the liquid medicine can flow out from the liquid outlet holes 415 after being filtered by the filtering membrane 42.

First check valve 43 one end is the ring shape with erection column 412 looks adaptation down, and fixed cover is established under on erection column 412, the whole V-arrangement structure that is of the other end, its opening also from last structure to forming the gradual throat down, when extracting the liquid medicine, can produce from last negative pressure down, under the effect of negative pressure, the lower extreme opening of first check valve 43 can be strutted, thereby realize switching on, when injecting the liquid medicine, supreme pressure can be produced from down, because the V-arrangement structure of first check valve 43 lower extreme, under the effect of pressure, thereby can inwards contract and closely laminate, realize sealing, therefore, the one-way function that switches on of feed liquor hole 414 can be realized to first check valve 43.

The second one-way valve 44 comprises a central fixing ring 441, an annular sealing ring 442 is formed on the periphery of the upper end of the central fixing ring 441, the central fixing ring 441 is matched with the upper mounting column 411 and fixedly sleeved on the upper mounting column 411, and the sealing ring 442 extends to the annular boss 413 and is in sealing fit with the annular boss 413; when the extraction liquid medicine, can produce from last negative pressure extremely down, under the effect of negative pressure, the sealing ring 442 of second check valve 44 can closely laminate with annular boss 413, thereby realize reliably sealing, when the injection liquid medicine, can produce from supreme pressure down, under the effect of pressure, thereby the sealing ring 442 of second check valve 44 can upwards turn up and separate with annular boss 413, thereby realize switching on, consequently, second check valve 44 can realize going out the one-way function that switches on of liquid hole 415.

The first check valve 43 and the second check valve 44 are made of elastic rubber, so that the installation is convenient, the operation is reliable, and the performance is stable.

The sealing ring 441 of the second one-way valve 44 has taper and is in an umbrella-shaped structure, the upper surface of the annular boss 413 is a conical surface matched with the sealing ring 441, so that the action requirement of the second one-way valve is better met, the height of the upper mounting column 411 is basically consistent with that of the central fixing ring 441 of the second one-way valve 44, the liquid medicine is extracted, the extraction is ensured to be clean as far as possible, and the residue in the first needle seat is avoided.

In addition, annular boss 413 constitutes interference fit with last needle file 21, the inner circle of lower needle file 22 upper end is formed with the mounting groove of undercut, mounting disc 41 inlays and establishes in the mounting groove to constitute interference fit with the mounting groove.

During integral assembly, the filtering membrane 42 is sleeved on the lower mounting column 412 of the mounting disc 41, the first check valve 43 is sleeved on the lower mounting column 412, and after the first check valve 43 is mounted, the first check valve 43 can simultaneously position the middle part of the filtering membrane 42; then, the mounting disc 41 is embedded into the mounting groove of the lower needle seat 22, the mounting disc 41 and the mounting groove are in interference fit to realize reliable connection, and meanwhile, the mounting disc 41 and the lower needle seat 22 can form a fixing and clamping effect on the edge of the filter membrane 42; and then the second check valve 44 is sleeved on the upper mounting column 411, finally the upper needle base 21 is sleeved on the mounting column 411, the upper needle base 21 and the annular boss 413 of the mounting column 411 are reliably connected through interference fit, and the integral assembly operation is very convenient, the structure is simple, and the installation is convenient.

When in use, the needle tube 3 is connected with the upper needle base 21, the injector body 1 is connected with the lower needle base 22, when liquid medicine is extracted, negative pressure from top to bottom is generated, the lower end opening of the first one-way valve 43 can be spread under the action of the negative pressure so as to realize conduction, the sealing ring 442 of the second one-way valve 44 can be tightly attached to the annular boss 413, so that reliable sealing is realized, the liquid medicine can only enter the lower needle base 22 and the injector body through the liquid inlet hole 414, when the liquid medicine is injected, pressure from bottom to top can be generated, under the action of the pressure, the lower end opening of the first one-way valve 43 can be inwardly contracted so as to be tightly attached, reliable sealing is realized, the sealing ring 442 of the second one-way valve 44 can be upwardly turned up so as to be separated from the annular boss 413, so as to realize conduction, so that the liquid medicine can only be pushed out through the liquid outlet hole 415, and liquid medicine need pass through filtration membrane filtration back, just can enter into out liquid hole 415 to form a filtering action, reduce impurity, safe and reliable more.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. The syringe with the filtering function comprises a syringe body (1), a needle seat (2) and a needle tube (3), wherein the needle seat (2) comprises an upper needle seat (21) and a lower needle seat (22), the needle tube (3) is connected with the upper needle seat (21), and the syringe body (1) is connected with the lower needle seat (22); a filtering device (4) is arranged between the upper needle seat (21) and the lower needle seat (22);

the method is characterized in that: the filtering device (4) comprises a mounting disc (41), a filtering membrane (42), a first one-way valve (43) and a second one-way valve (44);

the mounting disc (41) is fixedly clamped between the upper needle base (21) and the lower needle base (22), an upper mounting column (411) protrudes from the center of the upper end of the mounting disc (41), a lower mounting column (412) protrudes from the center of the lower end of the mounting disc (41), an annular boss (413) is further arranged at the upper end of the mounting disc (41), a vertically-through liquid inlet hole (414) is formed in the center of the mounting disc (41), and a plurality of circumferentially-uniformly-distributed vertically-through liquid outlet holes (415) are formed in the mounting disc (41) between the annular boss (413) and the upper mounting column (411);

the filtering membrane (42) is of an annular structure and is sleeved on the lower mounting column (412), and the edge of the filtering membrane (42) is clamped and fixed by the mounting disc (41) and the lower needle base (22);

the first one-way valve (43) is fixed on the lower mounting column (412) and used for realizing one-way conduction of the liquid inlet hole (414);

the second one-way valve (44) is fixed between the upper mounting column (411) and the annular boss (413) and is used for realizing one-way conduction of the liquid outlet hole (415).

2. The syringe with filtering function according to claim 1, wherein: one end of the first check valve (43) is fixedly sleeved on the lower mounting column (412), and the other end of the first check valve is of a flat V-shaped structure.

3. The syringe with filtering function according to claim 1, wherein: second check valve (44) including the solid fixed ring in center (441), the periphery of the solid fixed ring in center (441) upper end is formed with annular sealing ring (442), second check valve (44) are fixed the cover through solid fixed ring in center (441) and are established on last erection column (411), sealing ring (441) and annular boss (413) are sealed the laminating.

4. The syringe with filtering function according to claim 3, characterized in that: the sealing ring (441) has taper and is of an umbrella-shaped structure, and the upper surface of the annular boss (413) is a conical surface matched with the sealing ring (441).

5. The syringe with filtering function according to claim 4, characterized in that: the height of the upper mounting column (411) is consistent with that of the central fixing ring (441).

6. The syringe with filtering function according to claim 1, wherein: the mounting disc (41) is in interference fit with the upper needle seat (21) through an annular boss (413).

7. The syringe with filtering function according to claim 6, characterized in that: the inner ring of the upper end of the lower needle seat (22) is provided with a mounting groove which is sunken downwards, and the mounting disc (41) is embedded in the mounting groove and is in interference fit with the mounting groove.

8. The syringe with filtering function according to claim 1, wherein: the first check valve (43) and the second check valve (44) are made of elastic rubber.