Needleless connector

Abstract

The utility model relates to the technical field of infusion tools, and provides a needleless connector which comprises a needleless connector body, an injector is inserted into the top of the needleless connector body, an installation retaining ring is arranged on the outer side of the middle of the needleless connector body in a sleeved mode, and a plugging belt is fixedly arranged on the edge of the top face of the installation retaining ring. The blocking belt comprises a first soft belt, a connecting plate and a blocking plug, a suction assembly is fixedly arranged on the edge of the bottom face of the mounting retaining ring, and the suction assembly comprises an elastic bag body, a one-way drain valve, a one-way liquid inlet valve and a second soft belt. After the needleless connector is washed, the sealing plug at the top of the sealing belt is plugged to the top of the needleless connector, one end of the elastic bag body is communicated with the bottom of the needleless connector through the butt joint cylinder, air on the inner side is discharged through the one-way drain valve by pressing the elastic bag body, and then the elastic bag body is pulled to recover, so that suction force is generated on the inner side of the elastic bag body; residual liquid on the inner side of the needle-free connector is pumped out through the one-way liquid inlet valve at one end, and the negative pressure suction mode is good in cleaning effect.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion tools, in particular to a needle-free connector. Background Art

[0002] The PICC tube is a catheter inserted into the central vein through a peripheral vein, with the tip of the catheter located in the superior vena cava or subclavian vein. The PICC can be used to inject drug infusions into the central vein with large and fast blood flow, to avoid damage to the patient's blood vessels due to long-term infusions or infusions of hypertonic and irritating drugs, and to reduce the pain caused to the patient by repeated punctures. It is often used in patients who need chemotherapy. The PICC tube is often used in conjunction with a needleless connector. The external syringe is connected to the PICC line through the needleless connector for drug injection, to avoid the syringe being directly connected to the line, which may lead to infection, and the syringe needle may pierce the end of the line multiple times to seal the blockage, which may easily cause rubber particles to enter the drug solution.

[0003] The currently used needle-free connectors need to be flushed with saline after injecting nutrient solution or connecting the PICC line. This is because the molecular components of the drug will remain in the positive pressure connector after the nutrient solution is injected. Due to the complex structure of the connector, such as the spring structure, there are many dead corners, and if the flushing is not clean, the molecular structure of the residual flow will cause molecular changes on the connector for a long time, and entering the body after repeated flushing will cause infection risks.

[0004] Therefore, a needle-free connector is needed that can be easily flushed and has a good flushing effect. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a needle-free connector, which has the characteristics of good flushing effect and convenient operation.

[0006] In order to achieve the above purpose, the utility model proposes the following specific solutions:

[0007] A needle-free connector comprises a needle-free connector, wherein a syringe is inserted into the top of the needle-free connector, a mounting buckle is sleeved on the outer middle part of the needle-free connector, a sealing band is fixedly provided on the edge of the top surface of the mounting buckle, and the sealing band comprises a first soft band, a connecting plate and a sealing plug, one end of the first soft band is fixed to one side of the top surface of the sealing band, the upper end of the first soft band is fixedly connected to a connecting plate, a sealing plug is fixedly provided on the side wall of the connecting plate, a suction assembly is fixedly provided on the edge of the bottom surface of the mounting buckle, and the suction assembly comprises an elastic capsule, a one-way discharge valve, a one-way inlet valve and a second soft band, one end of the second soft band is fixed to the bottom of the mounting buckle, the lower end of the second soft band is fixedly connected to the elastic capsule, one end of the elastic capsule is fixedly provided with a one-way discharge valve, and the other end of the elastic capsule is fixedly provided with a one-way inlet valve.

[0008] As a preferred technical solution of the needleless connector of the utility model, an injection port is provided at the top of the needleless connector, the lower end of the syringe is inserted into the inner side of the needleless connector, and a drainage tube is fixedly provided at the bottom of the needleless connector.

[0009] As a preferred technical solution of the needleless connector of the utility model, a docking sleeve is fixedly provided on the outer side of the one-way liquid inlet valve, and the inner size of the docking sleeve is matched with the outer size of the liquid discharge tube.

[0010] As a preferred technical solution of the needle-free connector of the utility model, the sealing plug is made of a flexible material, and the size of the sealing plug is matched with the inner size of the injection port.

[0011] As a preferred technical solution for a needleless connector of the utility model, a first clip is fixedly provided at one end of the mounting buckle, a clip slot is provided on the side wall of the first clip, a second clip is fixedly provided at the other end of the mounting buckle, a clip strip is fixed on the side wall of the second clip, and the clip strip and the clip slot are clipped into each other.

[0012] As a preferred technical solution of the needleless connector of the utility model, a sealing ring is fixedly provided on the inner wall of the docking tube, and the sealing ring is made of a flexible material.

[0013] As a preferred technical solution for a needle-free connector of the utility model, a first limiting buckle is fixedly provided on one side of the outer wall of the elastic sac body, and a second limiting buckle is fixedly provided on the other side of the elastic sac body, and the first limiting buckle and the second limiting buckle are symmetrically arranged.

[0014] As a preferred technical solution for the needleless connector of the present invention, both the first limiting buckle and the second limiting buckle are made of flexible material.

[0015] Compared with the existing technology, the utility model has the following beneficial effects:

[0016] The utility model provides a needleless connector, a syringe, a mounting buckle ring, a sealing belt and a suction assembly. When the needleless connector needs to be flushed after use, the syringe sucked with a cleaning liquid such as physiological saline can be inserted into the inner side of the needleless connector for flushing. After flushing, the mounting buckle ring can be buckled on the outer side of the needleless connector, the sealing belt and the suction assembly are fixed on the mounting buckle ring, the sealing plug at the top of the sealing belt is sealed to the inner side of the top of the needleless connector, one end of the elastic bag body of the suction assembly is connected to the bottom of the needleless connector through the docking sleeve, the elastic bag body is pressed to discharge the air inside through the one-way liquid discharge valve, and then the elastic bag body is pulled to recover, so that suction is generated inside the elastic bag body, and the residual liquid in the inner side of the needleless connector is sucked out through the one-way liquid inlet valve at one end. The above operation is repeated to continuously generate negative pressure suction, thereby fully sucking and discharging the cleaning liquid residual in the inner side of the needleless connector. The negative pressure suction method has good cleaning effect and is easy to operate, which avoids the situation where the residual liquid inside the needleless connector contaminates the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better describe the technical solution of the utility model in detail, the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0019] Figure 2 It is a partial cross-sectional view of the utility model;

[0020] Figure 3 For the utility model Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 For the utility model Figure 2 A magnified schematic diagram of point B in the middle.

[0022] In the figure: 1. needleless connector; 11. injection port; 12. drainage tube; 2. syringe; 3. mounting buckle; 31. first cassette; 32. slot; 33. second cassette; 34. card strip; 4. sealing belt; 41. first soft belt; 42. connecting plate; 43. sealing plug; 5. suction assembly; 51. elastic bladder; 52. one-way drainage valve; 53. one-way inlet valve; 54. docking sleeve; 541. sealing ring; 55. first limit buckle; 56. second limit buckle; 57. second soft belt. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example

[0025] See also Figure 1-4 As shown, the utility model provides the following technical solutions: a needleless connector, comprising a needleless connector 1, a syringe 2 is inserted at the top of the needleless connector 1, and the connection method between the syringe 2 and the needleless connector 1 can refer to the prior art, which is not described in detail here; an injection port 11 is provided at the top of the needleless connector 1, the lower end of the syringe 2 is inserted at the inner side of the needleless connector 1, and a drainage tube 12 is fixedly provided at the bottom of the needleless connector 1; the specific internal structure and use principle of the needleless connector 1 belong to the common prior art, so they are not described in detail here.

[0026] Reference Figure 2 and Figure 3As shown, specifically, a mounting buckle ring 3 is sleeved on the outer side of the middle part of the needleless connector 1, and a sealing band 4 is fixedly provided on the edge of the top surface of the mounting buckle ring 3. The sealing band 4 includes a first soft band 41, a connecting plate 42 and a sealing plug 43. One end of the first soft band 41 is fixed to one side of the top surface of the sealing band 4, and a connecting plate 42 is fixedly connected to the upper end of the first soft band 41. A sealing plug 43 is fixed on the side wall of the connecting plate 42, which can seal and plug the top of the needleless connector 1; the sealing plug 43 is made of a flexible material, and ... The size of the plug 43 matches the inner size of the injection port 11, and the clamping is tighter; a suction assembly 5 is fixedly provided on the bottom edge of the mounting buckle 3, and the suction assembly 5 includes an elastic capsule 51, a one-way liquid discharge valve 52, a one-way liquid inlet valve 53 and a second soft belt 57, one end of the second soft belt 57 is fixed to the bottom of the mounting buckle 3, and the lower end of the second soft belt 57 is fixedly connected with an elastic capsule 51, which is a hollow capsule, one end of the elastic capsule 51 is fixedly provided with a one-way liquid discharge valve 52, and the other end of the elastic capsule 51 is fixedly provided with a one-way liquid discharge valve 52. A one-way inlet valve 53 is fixedly provided at one end, which can be used to suck and discharge air and liquid. The specific structure and use principle of the one-way inlet valve 53 and the one-way discharge valve 52 can refer to the one-way valve body in the prior art, which belongs to the prior art and is not described in detail here. A docking sleeve 54 is fixedly provided on the outer side of the one-way inlet valve 53. The inner side size of the docking sleeve 54 is adapted to the outer side size of the discharge tube 12 and can be used to connect with the bottom of the needleless connector 1. A sealing ring 5 is fixedly provided on the inner wall of the docking sleeve 54. 41, the sealing ring 541 is made of a flexible material and can achieve a sealed connection to avoid liquid leakage. After flushing and cleaning the needleless connector 1, the sealing plug 43 is sealed on the top of the needleless connector 1, and the one-way liquid inlet valve 53 of the elastic capsule 51 is connected to the bottom of the needleless connector 1. Then, by repeatedly squeezing the elastic capsule 51, negative pressure is generated inside the capsule to suck the cleaning liquid remaining inside the needleless connector 1 and then discharge it. The negative pressure suction cleaning effect is good and contamination caused by liquid residue is avoided.

[0027] Reference Figure 2 and Figure 4 As shown, specifically, a first clip 31 is fixedly provided at one end of the mounting buckle 3, a clip slot 32 is provided on the side wall of the first clip 31, a second clip 33 is fixedly provided at the other end of the mounting buckle 3, a clip strip 34 is fixedly provided on the side wall of the second clip strip 33, the clip strip 34 and the clip slot 32 are clipped together, the mounting buckle 3 can be made of elastic material, and the installation is stable; this solution connects the needleless connector 1 to the mounting buckle 3 by a clip-on method, which is easy to install and convenient to disassemble and replace.

[0028] Reference Figure 1 and Figure 2As shown, specifically, a first limit buckle 55 is fixedly provided on one side of the outer wall of the elastic sac body 51, and a second limit buckle 56 is fixedly provided on the other side of the elastic sac body 51. The first limit buckle 55 and the second limit buckle 56 are symmetrically arranged, and the operator can insert his fingers into the inner side of the limit buckle during use; the first limit buckle 55 and the second limit buckle 56 are both made of flexible materials; the operator can conveniently realize the compression and recovery of the elastic sac body 51 by pulling the limit buckle with his fingers, and the operation is convenient.

[0029] The working principle and use process of the utility model are as follows: after using the needleless connector 1, cleaning liquid is sucked by the syringe 2 and injected into the inner side of the needleless connector 1 to flush the inner side thereof. After cleaning, the mounting buckle 3 is sleeved onto the outer side of the needleless connector 1, and the sealing plug 43 at the top of the sealing belt 4 is blocked to the top of the needleless connector 1. The one-way liquid inlet valve 53 of the elastic capsule 51 is connected to the bottom of the needleless connector 1 through the docking tube 54. Then, the operator inserts a finger into the inner side of the first limit buckle 55 and the second limit buckle 56, and reciprocally compresses and pulls the elastic capsule 51, so that the elastic capsule 51 sucks the liquid inside the needleless connector 1 through the one-way liquid inlet valve 53, and then discharges the liquid through the one-way liquid discharge valve 52. The negative pressure suction method has a good cleaning effect, and the contamination caused by residual liquid inside the needleless connector 1 can be avoided.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A needleless connector, comprising a needleless connector (1), characterized in that: The top of the needleless connector (1) is plugged with a syringe (2), the middle outer side of the needleless connector (1) is sleeved with a mounting buckle (3), the top edge of the mounting buckle (3) is fixedly provided with a blocking band (4), the blocking band (4) comprises a first soft band (41), a connecting plate (42) and a blocking plug (43), one end of the first soft band (41) is fixed to one side of the top surface of the blocking band (4), the upper end of the first soft band (41) is fixedly connected with a connecting plate (42), and the side wall of the connecting plate (42) is fixedly provided with a blocking plug (43). ), a suction assembly (5) is fixedly provided on the bottom edge of the mounting buckle (3), the suction assembly (5) comprises an elastic sac (51), a one-way liquid discharge valve (52), a one-way liquid inlet valve (53) and a second soft belt (57), one end of the second soft belt (57) is fixed to the bottom of the mounting buckle (3), the lower end of the second soft belt (57) is fixedly connected to the elastic sac (51), one end of the elastic sac (51) is fixedly provided with a one-way liquid discharge valve (52), and the other end of the elastic sac (51) is fixedly provided with a one-way liquid inlet valve (53).

2. A needleless connector according to claim 1, characterized in that: The top of the needleless connector (1) is provided with an injection port (11), the lower end of the syringe (2) is plugged into the inner side of the needleless connector (1), and the bottom of the needleless connector (1) is fixedly provided with a liquid discharge tube (12).

3. A needleless connector according to claim 2, characterized in that: A docking sleeve (54) is fixedly provided on the outer side of the one-way liquid inlet valve (53), and the inner side size of the docking sleeve (54) is matched with the outer side size of the liquid discharge pipe (12).

4. A needleless connector according to claim 3, characterized in that: The sealing plug (43) is made of a flexible material, and the size of the sealing plug (43) is adapted to the inner size of the injection port (11).

5. A needleless connector according to claim 4, characterized in that: A first clamping strap (31) is fixedly provided at one end of the mounting buckle (3), a clamping slot (32) is provided on the side wall of the first clamping strap (31), a second clamping strap (33) is fixedly provided at the other end of the mounting buckle (3), a clamping strip (34) is fixedly provided on the side wall of the second clamping strap (33), and the clamping strip (34) and the clamping slot (32) are clamped with each other.

6. A needleless connector according to claim 5, characterized in that: A sealing ring (541) is fixedly provided on the inner wall of the docking tube (54), and the sealing ring (541) is made of a flexible material.

7. A needleless connector according to claim 6, characterized in that: A first limiting buckle (55) is fixedly provided on one side of the outer wall of the elastic sac (51), and a second limiting buckle (56) is fixedly provided on the other side of the elastic sac (51), wherein the first limiting buckle (55) and the second limiting buckle (56) are symmetrically arranged.

8. The needleless connector according to claim 7, characterized in that: The first limiting buckle (55) and the second limiting buckle (56) are both made of flexible material.

Images