CN209809214U - Novel intravenous injector - Google Patents

Abstract

The utility model relates to the field of medical equipment. Aim at provides a novel intravenous route ware with impurity filtering capability. The utility model adopts the technical proposal that: a novel intravenous injector comprises a needle cylinder, a piston arranged in the needle cylinder and a push rod connected with the piston; the lower end of the needle cylinder is provided with a short connecting column, and two vertical through holes are formed in the short connecting column; the needle head is composed of a needle body and a connector arranged at the upper end of the needle body; the connector is sleeved outside the short connecting column and is in threaded connection with the short connecting column; a group of one-way valve assemblies are respectively arranged in the two through holes of the short connecting column; one of the two through holes is a liquid inlet hole, the other is a liquid outlet hole, and the bottom surface of the needle cylinder at the upper end of the liquid outlet hole is also provided with an impurity filter screen; the conical cylinder section of the valve cylinder in the liquid inlet hole faces downwards, and the conical cylinder section of the valve cylinder in the liquid outlet hole faces upwards. The utility model discloses can effectually get rid of the impurity in the liquid medicine of injection out.

Description

Novel intravenous injector

Technical Field

The utility model relates to the field of medical equipment, concretely relates to intravenous route ware.

Background

The ampoule bottle is a bottle body widely used in the holding of injection medicine, and when in use, the bottle head is knocked, and then the liquid medicine in the ampoule bottle is sucked out by the syringe. However, in the actual use process, due to the influence of factors such as irregular operation, tiny impurities are mixed in the liquid medicine, and the existing injector does not have the function of filtering the impurities, so that foreign matters enter the blood system of a human body, and the health of the human body is seriously influenced.

Disclosure of Invention

An object of the utility model is to provide a novel intravenous route ware with impurity filtering capability.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows: a novel intravenous injector comprises a needle cylinder, a piston arranged in the needle cylinder and a push rod connected with the piston;

the lower end of the needle cylinder is provided with a short connecting column, and two vertical through holes are formed in the short connecting column; the needle head is composed of a needle body and a connector arranged at the upper end of the needle body; the connector is sleeved outside the short connecting column and is in threaded connection with the short connecting column;

a group of one-way valve assemblies are arranged in the two through holes of the short connecting column respectively; the check valve assembly comprises a valve cylinder and a valve ball arranged in the valve cylinder, and the valve cylinder consists of a cylinder section and a cone section which are connected with each other; the cylindrical section is matched with the through hole in the short connecting column and is arranged in the through hole; a liquid passing hole is formed in the center of one end, far away from the cylindrical section, of the conical section, the size of the liquid passing hole is smaller than that of the valve ball, and a limiting strip used for preventing the valve ball from withdrawing from the valve cylinder is further arranged in one end, far away from the conical section, of the cylindrical section; one of the two through holes is a liquid inlet hole, the other one is a liquid outlet hole, and an impurity filter screen is also arranged on the bottom surface of the needle cylinder at the upper end of the liquid outlet hole; the conical section of the valve cylinder in the liquid inlet hole faces downwards, and the conical section of the valve cylinder in the liquid outlet hole faces upwards.

Preferably, the valve cylinder is in threaded connection with the through hole.

Preferably, the valve cylinder is bonded to the through hole.

Preferably, the impurity filter screen is bonded with the needle cylinder.

Preferably, the short connecting column and the needle cylinder are of an integral structure.

The beneficial effects of the utility model are concentrated and are embodied in: can effectively remove impurities in the injected liquid medicine. Particularly, the utility model discloses in the use, check valve subassembly's theory of operation is that the valve ball blocks up the liquid hole under the promotion of liquid, realizes sealing. The one-way valve component in the liquid inlet hole plays a role of one-way conduction from the needle to the needle cylinder, and the one-way valve component in the liquid outlet hole plays a role of one-way conduction from the needle cylinder to the needle. When the liquid medicine is inhaled, the liquid medicine enters the needle cylinder through the needle head and the liquid inlet hole in sequence. When the liquid medicine is injected, impurities are retained in the needle cylinder by the impurity filter screen, and the liquid medicine is extruded out through the liquid outlet hole and the needle head in sequence. Compare with traditional syringe, the utility model discloses can reduce or even avoid the harmful effects of impurity in the liquid medicine to the human body with the effectual getting rid of impurity when the injection, just the utility model discloses operating mode is identical with traditional mode, very convenient to popularize and apply.

Drawings

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

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

fig. 3 is a schematic structural view of the check valve assembly.

Detailed Description

Combine a novel intravenous route ware that fig. 1-3 show, the same with traditional syringe, the utility model discloses also include cylinder 1, set up piston 2 in cylinder 1 and the push rod 3 of being connected with piston 2, the cooperation connection between cylinder 1, piston 2 and the push rod 3 is prior art, no longer redundant in the utility model discloses.

The utility model discloses a difference lies in, the lower extreme of cylinder 1 is provided with short spliced pole 4, short spliced pole 4 structure as an organic whole with cylinder 1 usually adopts medical grade plastics to make. Two vertical through holes 5 are arranged in the short connecting column 4, one end of each through hole 5 is communicated with the needle cylinder 1, and the other end of each through hole 5 extends to the bottom surface of the short connecting column 4. Of course, the utility model discloses still include the syringe needle, the syringe needle comprises needle body 6 and the connector 7 of setting in the needle body 6 upper end, and its inside liquid passage that sets up, the structure of syringe needle is to match with commercially available product, and the difference lies in, connector 7 cover is established outside short spliced pole 4 to with 4 threaded connection of short spliced pole, the stability of connection is good.

As shown in fig. 2, a set of check valve assemblies 8 are respectively arranged in the two through holes 5 of the short connecting column 4, and the check valve assemblies 8 are used for controlling the flow direction of the liquid in the through holes 5, that is, the flow directions of the liquid in the two through holes 5 are opposite, one is used for liquid inlet and the other is used for liquid outlet. As shown in fig. 3, the check valve assembly 8 includes a valve cylinder composed of a cylindrical section 10 and a conical section 11 connected to each other, and a valve ball 9 disposed in the valve cylinder. The cylinder section 10 is matched with the through hole 5 in the short connecting column 4 and is arranged in the through hole 5, and the specific installation mode can be as follows: threads are arranged on the inner wall of the through hole 5 and the cylinder section 10 of the valve cylinder, and the valve cylinder is in threaded connection with the through hole 5. Or the valve cylinder is directly bonded with the wall of the through hole 5, and the adhesive selected during bonding meets the medical standard and ensures the bonding stability.

As shown in fig. 3, a liquid passing hole 12 is formed in the center of one end, away from the cylindrical section 10, of the conical section 11, the size of the liquid passing hole 12 is smaller than that of the valve ball 9, the valve ball 9 can block the liquid passing hole 12, a limiting strip 13 for preventing the valve ball 9 from exiting the valve cylinder is further arranged in one end, away from the conical section 11, of the cylindrical section 10, and the number and specific positions of the limiting strips 13 are not limited as long as the same function can be achieved. As shown in fig. 3, the limiting strip 13 is one strip and is located in the middle of the valve cylinder, and openings on two sides of the limiting strip are insufficient for the valve ball 9 to pass through.

One of the two through holes 5 of the utility model is a liquid inlet hole, the other is a liquid outlet hole, an impurity filter screen 14 is arranged on the bottom surface of the needle cylinder 1 at the upper end of the liquid outlet hole, the impurity filter screen 14 is bonded with the needle cylinder 1, and the bonded adhesive should also be of medical grade; of course, other ways of mounting the impurity filter screen 14 are possible while ensuring a stable mounting. As shown in fig. 2, the conical section 11 of the valve cylinder in the liquid inlet hole faces downward, and the conical section 11 of the valve cylinder in the liquid outlet hole faces upward.

The utility model discloses in the use, check valve subassembly 8's theory of operation is that valve ball 9 blocks up under the promotion of liquid and crosses liquid hole 12, realizes sealing. The liquid inlet hole, namely the check valve assembly 8 in the through hole 5 on the left side in fig. 2, plays a role of one-way communication from the needle to the needle cylinder 1, and the liquid outlet hole, namely the check valve assembly 8 in the through hole 5 on the right side in fig. 2, plays a role of one-way communication from the needle cylinder 1 to the needle. When the liquid medicine is inhaled, the liquid medicine enters the needle cylinder 1 through the needle head and the liquid inlet hole in sequence. When the liquid medicine is injected, impurities are trapped in the needle cylinder 1 by the impurity filter screen 14, and the liquid medicine is extruded out through the liquid outlet hole and the needle head in sequence. Compare with traditional syringe, the utility model discloses can reduce or even avoid the harmful effects of impurity in the liquid medicine to the human body with the effectual getting rid of impurity when the injection, just the utility model discloses operating mode is identical with traditional mode, very convenient to popularize and apply.

Claims (5)

1. A novel intravenous injector comprises a needle cylinder (1), a piston (2) arranged in the needle cylinder (1) and a push rod (3) connected with the piston (2);

the method is characterized in that: the lower end of the needle cylinder (1) is provided with a short connecting column (4), and two vertical through holes (5) are formed in the short connecting column (4); the needle head is composed of a needle body (6) and a connector (7) arranged at the upper end of the needle body (6); the connector (7) is sleeved outside the short connecting column (4) and is in threaded connection with the short connecting column (4);

a group of one-way valve assemblies (8) are respectively arranged in the two through holes (5) of the short connecting column (4); the check valve assembly (8) comprises a valve cylinder and a valve ball (9) arranged in the valve cylinder, and the valve cylinder is composed of a cylinder section (10) and a cone section (11) which are connected with each other; the cylindrical section (10) is matched with the through hole (5) in the short connecting column (4) and is arranged in the through hole (5); a liquid passing hole (12) is formed in the center of one end, away from the cylindrical section (10), of the conical section (11), the size of the liquid passing hole (12) is smaller than that of the valve ball (9), and a limiting strip (13) used for preventing the valve ball (9) from exiting the valve cylinder is further arranged in one end, away from the conical section (11), of the cylindrical section (10); one of the two through holes (5) is a liquid inlet hole, the other is a liquid outlet hole, and an impurity filter screen (14) is also arranged on the bottom surface of the needle cylinder (1) at the upper end of the liquid outlet hole; the conical section (11) of the valve cylinder in the liquid inlet hole faces downwards, and the conical section (11) of the valve cylinder in the liquid outlet hole faces upwards.

2. The novel intravenous injector of claim 1, wherein: the valve cylinder is in threaded connection with the through hole (5).

3. The novel intravenous injector of claim 1, wherein: the valve cylinder is bonded with the through hole (5).

4. The novel intravenous injector of claim 1, wherein: the impurity filter screen (14) is bonded with the needle cylinder (1).

5. The novel intravenous injector of claim 1, wherein: the short connecting column (4) and the needle cylinder (1) are of an integral structure.