WO2017016095A1

WO2017016095A1 - Positive pressure needle-free injection t-type connector device

Info

Publication number: WO2017016095A1
Application number: PCT/CN2015/093822
Authority: WO
Inventors: 郭永斌
Original assignee: 佳承精工股份有限公司
Priority date: 2015-07-29
Filing date: 2015-11-05
Publication date: 2017-02-02
Also published as: CN205007428U

Abstract

A positive pressure needle-free injection T-type connector device (100), comprising a T-type tube (1) and an elastic sealing component (2) arranged therein, the T-type tube (1) being provided with a needleless injection interface portion (111), an outer end of the needleless injection interface portion (111) being provided with an injector interface (1111) substantially matching a needleless injector (I), the elastic sealing component (2) being provided with a pressure-bearing head (21), a pressure-actuated body (22) and a pressure-bearing base (23), the pressure-bearing head (21) being provided with a sealing portion (211) substantially sealing the injector interface (1111), a flow space (S2) being provided between outer surfaces of the pressure-actuated body (22) and the pressure-bearing base (23) and an inner surface of the T-type tube (1). When an injection is finished and the needleless injector (I) is removed from the injector interface (1111), the shape of the elastic sealing component (2), having been deformed by bearing pressure, elastically returns to the original shape, thereby producing a liquid volume difference relative to when bearing pressure, and the liquid volume difference forms a positive pressure for a liquid to flow towards an injection fluid inner inlet (117).

Description

Positive pressure needle-free injection T-joint device

Related application

The application of the present application claims the priority of the Chinese Patent Application No. 201520556678.8, entitled "Positive Pressure Needle Injection T-Joint Device", which is incorporated herein by reference in its entirety.

Technical field

The utility model relates to a needle-free injection T-joint device, in particular to a positive pressure needle-free injection T-joint device.

Background technique

In the course of intravenous infusion therapy, patients are often required to undergo long-term infusion or injection. In general, in order to alleviate the pain of repeated puncture of the patient and reduce the workload of the medical staff, a venous indwelling needle or an indwelling catheter is inserted on the patient's body, and the intravenous indwelling needle or the indwelling catheter is usually A three-way connector, such as a T-connector, is connected. The three ends of the T-joint are respectively a needle-free injection joint, a needle joint, and an infusion sleeve joint, and the needle-free injection joint is used to connect a needle-free syringe, and the medical staff passes the needle-free syringe. Infusion or drug injection into the patient.

In order to avoid the indwelling needle or catheter during injection, the tube is blocked due to blood return or residual liquid medicine. In recent years, it has been developed to use a positive pressure joint to connect with a needle-free injection joint, and a positive pressure is provided through the positive pressure joint to compare the liquid medicine. It does not remain in the indwelling needle or catheter and avoids returning blood.

However, the existing positive pressure joint structure is complicated, and it is a problem to be solved from the viewpoint of economic cost.

Summary of the invention

Accordingly, it is an object of the present invention to provide a positive pressure needle-free injection T-joint device to simplify its structure.

The technical means adopted by the utility model to solve the problems of the prior art is to provide a positive pressure needle-free injection T-joint device, comprising: a T-shaped tube having two transverse tube portions communicating with each other in a lateral direction and longitudinally communicating with the same The longitudinal tube portion of the junction of the two transverse tube portions, at least one of the lateral tube portions has a limiting portion and a needleless injection interface portion, the limiting portion facing the inner wall of the lateral tube portion The circumferential center of the lateral tube portion extends to form and enclose an inlet of the injection liquid, and the needle-free injection interface portion is an outer end portion of the lateral tube portion and has a syringe interface substantially matching the needle-free injector; And an elastic sealing member disposed in the lateral pipe portion, wherein the elastic sealing member sequentially has a pressure receiving head, a pressing body, and a pressure receiving seat, wherein the pressure receiving head has a close portion The sealing portion substantially closes the syringe interface, the side of the pressure receiving head is formed with a notch portion, and the outer surface of the pressing body and the pressure receiving seat are Flow between the inner surfaces of the transverse tubes Between said pressure-receiving seat having a recessed portion so as to form a compression space, the a recessed portion is disposed at the limiting portion to cover the inlet of the injection liquid, and a communication space is formed between the pressure receiving seat and the limiting portion to communicate with the a fluid passage of the inlet in the injection, wherein when the needle-free injector is inserted from the syringe interface, the pressure head of the elastic sealing member is subjected to pressure and bent through the notch portion, and The pressure receiving portion of the pressure receiving seat is inwardly retracted, so that the pressure receiving portion of the pressure receiving head is separated from the syringe port to form an injection external inlet, and the outer surface of the pressure receiving head Forming a gap space between the inner surface of the lateral tube portion, the injection inlet, the gap space, the flow space, the fluid passage, and the injection liquid The inlets are in communication with each other such that liquid in the needle-free injector flows through the injection inlet, the gap space, the flow space, and the fluid passage into the injection solution Entrance, when the needleless syringe is described When the syringe interface is removed, the elastic sealing member is elastically restored to the original shape, thereby generating a liquid volume difference with respect to the pressure, and the liquid volume difference causes the liquid to flow to the inlet of the injection liquid. Positive pressure.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and the pressure seat is formed into a hollow hemispherical structure.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, wherein the outer diameter of the pressing body is gradually in a direction in which the syringe interface faces the inlet of the injection liquid. Shrink.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and the connection between the pressing body and the pressure receiving seat forms an angle greater than 90 degrees.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided. The inside of the pressure body is formed with a hollow space, and the hollow space is connected to the compression space.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, wherein the inner annular surface of the needle-free injection interface portion is formed with a reduced diameter inner edge portion, and the pressing is performed. The body has a radially outer edge portion corresponding to the inner diameter portion of the reduced diameter, and an outer diameter of the radially outer edge portion is larger than an inner diameter of the inner diameter portion of the reduced diameter, so that the radial outer edge The department is limited by the inner diameter of the reduced diameter.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, wherein the lateral tube portion includes a cover member and a tubular member that are sleeved with each other, and the tubular body member and the other One of the lateral tube portions and the longitudinal tube portion are connected, the needleless injection interface portion is located at the cover body member, and the limiting portion is located at the body member.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and the notch portion is a notch formed by a concave at a single-sided position of the pressure receiving head.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and the outer diameter surface of the pressure receiving seat is provided with a plurality of convex ring portions protruding radially.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, one of the lateral tube portions having the needle-free injection interface portion and the other of the lateral tube portions serving as an output tube And the longitudinal tube portion as the input tube portion.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, wherein the notch portion has an arc shape.

Through the technical means adopted by the utility model, when the needle-free injector is pulled out after the injection is completed, the elastic sealing member can elastically recover to the original shape and generate a positive pressure, and the positive pressure causes the liquid in the lateral pipe portion to be obtained in the conventional injection liquid. The entrance continues to avoid liquid residue and blood return. Moreover, the elastic sealing member of the utility model has a simple structure, thereby improving the economic cost.

DRAWINGS

1 is a plan view showing a positive pressure needle-free injection T-joint device in accordance with an embodiment of the present invention.

2 is a cross-sectional view showing a positive pressure needle-free injection T-joint device in accordance with an embodiment of the present invention.

3 is a schematic view showing a positive pressure needle-free injection T-joint device in use, in accordance with an embodiment of the present invention.

4 is a cross-sectional view showing a stopper of a positive pressure needle-free injection T-joint device according to an embodiment of the present invention.

5 is a cross-sectional view showing a positive pressure needle-free injection T-joint device in use, in accordance with an embodiment of the present invention.

6 is a cross-sectional view showing a positive pressure needle-free injection T-joint device in use, in accordance with an embodiment of the present invention.

FIG. 7 is a schematic view showing an elastic sealing member according to another embodiment of the present invention.

【Symbol Description】

100 positive pressure needle-free injection T-joint device

1 T-tube

11, 11' transverse pipe

111 needleless injection interface

1111 syringe interface

1112 reduced diameter inner edge

112 body parts

113 cover parts

114 Limits

115 support

116 inner wall surface

117 injection inlet

118 injection inlet

12 longitudinal tube

2, 2a elastic sealing member

21 pressure head

211 tight joint

212, 212a notch

22 pressure body

221 radial outer edge

23, 23a pressure seat

231 recess

232 convex ring

B infusion set

D1 outer diameter

D2 inner diameter

I needle-free injection department

N needle

P fluid pathway

S1 hollow space

S2 flow space

S3 compression space

S4 gap space

θ angle

detailed description

Embodiments of the present invention will be described below with reference to Figs. 1 to 7 . The description is not intended to limit the embodiments of the present invention, but is one of the embodiments of the present invention.

As shown in FIGS. 1 to 3, a positive pressure needle-free injection T-joint device 100 according to an embodiment of the present invention includes a T-tube 1 and an elastic sealing member 2.

In detail, the T-tube 1 has two transverse tube portions 11, 11' which are in lateral communication with each other, and a longitudinal tube portion 12 which is longitudinally connected to the junction of the two lateral tube portions 11, 11'. As shown in Fig. 3, in the present embodiment, one of the lateral tube portions 11 has a needleless injection interface portion 111 for connecting the needleless syringe I, and the other of the lateral tube portions 11' serves as an output tube. For connecting the needle N. The longitudinal tube portion 12 serves as an input tube portion for connecting the infusion set B. Of course, the present invention is not limited thereto. In other embodiments, the two lateral tubes each have a needleless injection interface for injection into a different liquid and the longitudinal tube as an output tube.

As shown in FIGS. 1 and 2, the lateral tube portion 11 includes a body member 112 and a cover member 113 that are sleeved with each other.

In conjunction with Figures 2 and 4, the tubular member 112 is coupled to the other of the transverse tubular portion 11' and the longitudinal tubular portion 12. The body member 112 includes a limiting portion 114 and a supporting portion 115, and the limiting portion 114 and the portion The support portion 115 extends toward the center of the body member 112 of the lateral tube portion 11 at the inner wall surface 116 of the tubular member 112 of the lateral tube portion 11 to enclose the injection liquid inlet 117. In this embodiment, the number of the limiting portions 114 is three, and are respectively disposed on the supporting portion 115 at equal intervals. Of course, the present invention is not limited thereto. In other embodiments, the number of the limiting portions 114 may vary.

As shown in FIGS. 2 and 4, the needleless injection interface portion 111 is disposed on the cover member 113. The needle-free injection interface portion 111 is an outer end portion of the cover member 113 of the lateral tube portion 11 and has a syringe interface 1111 substantially matching the needle-free injector I, and further, the needle-free injection The inner ring surface of the interface portion 111 is convexly formed with a reduced diameter inner edge portion 1112.

As shown in FIG. 2, the elastic sealing member 2 is disposed in the lateral pipe portion 11, and the elastic sealing member 2 has a pressure receiving head 21, a pressing body 22, and a pressure in sequence. Block 23.

The pressure receiving head 21 has a sealing portion 211 and a notch portion 212. The sealing portion 211 substantially closes the syringe interface 1111. Specifically, the diameter of the sealing portion 211 is slightly larger than The syringe interface 1111 is described. The notch portion 212 is a notch formed by a recess at a single side of the pressure receiving head 21 . In detail, in the embodiment, the notch portion 212 has an arc shape, and the curvature formed by the arc shape makes the notch portion 212 easy to be bent and deformed, thereby further reducing the needle-free portion. The force required for the syringe I to be inserted into the syringe interface 1111. Of course, the present invention is not limited to the arc shape of the notch portion 212. As shown in Fig. 7, the notch portion 212a of the elastic sealing member 2a is substantially V-shaped to be suitable for other use conditions.

In detail, the pressing body 22 has a radially outer edge portion 221 corresponding to the reduced diameter inner edge portion 1112 and a hollow space S1 formed therein. The outer diameter d1 of the radially outer edge portion 221 is larger than the inner diameter d2 of the reduced diameter inner edge portion 1112, and the radially outer edge portion 221 is restricted by the reduced diameter inner edge portion 1112. The outer surface of the pressing body 22 and the pressure receiving seat 23 and the inner surface of the lateral pipe portion 11 have a flow space S2. The pressure receiving seat 23 is formed in a hollow hemispherical structure, and has a concave portion 231 and a plurality of convex ring portions 232. The concave portion 231 is formed with a compression space S3 that communicates with the hollow space S1, and is disposed at the limiting portion 114 to cover the injection liquid inlet 117, and the pressure seat is A fluid passage P that communicates the flow space S2 with the injection inlet 117 is formed at a boundary with the restriction portion 114. The plurality of convex ring portions 232 are disposed on the outer diameter surface of the pressure receiving seat 23, and the plurality of convex ring portions 232 are radially protruded from the outer diameter surface of the pressure receiving seat 23, and are used. In order to increase the elastic restoring force of the pressure receiving seat 23, when the needle-free injector 1 is pulled out from the syringe interface 1111, the elastic sealing member 2 can be quickly rebounded and restored to the original state. Shape. Of course, the present invention is not limited to the fact that the plurality of convex ring portions 232 are formed on the outer diameter surface of the pressure receiving seat 23 described above. As shown in Fig. 7, the outer diameter surface of the pressure receiving seat 23a of the elastic sealing member 2a can be smooth and free from protrusions, which is easy to manufacture to simplify the process.

Preferably, in the present embodiment, in order to facilitate the bending of the elastic sealing member 2 in the direction of the notch portion 212, the outer diameter of the pressing body 22 is oriented toward the syringe interface 1111. The injection inlet 117 is tapered in the direction of the inlet, and the junction of the pressure body 22 and the pressure seat 23 is formed with an angle θ greater than 90 degrees.

As shown in FIG. 5, when the needle-free injector 1 is inserted from the syringe interface 1111, the elastic seal The pressure receiving head 21 of the member 2 is pressed and bent by the notch portion 212, and is inwardly retracted by the pressure of the pressure receiving seat 23, so that the pressure receiving portion 21 is tightly fitted. 211 is detached from the syringe interface 1111 to form an injection external inlet 118, and a gap space S4 is formed between an outer surface of the pressure receiving head 21 and an inner surface of the lateral tube portion 11 The injection external inlet 118, the notched space S4, the flow space S2, the fluid passage P, and the injection inlet 117 are in communication with each other to make the needleless injector 1 The liquid L flows through the injection external inlet 118, the notched space S4, the flow space S2, and the fluid passage P to the injection inlet 117.

As shown in FIG. 6, when the needle-free injector 1 is detached from the syringe interface 1111, the elastic sealing member 2 is elastically restored to the original shape, thereby generating a liquid volume difference with respect to the pressure. The liquid volume difference forms a positive pressure to the liquid L to the inlet 117 of the injection.

The above description and description are only illustrative of the preferred embodiments of the present invention, and other modifications may be made by those skilled in the art based on the scope of the claims and the above description, but the modifications should still be The inventive spirit of the utility model is within the scope of the present invention.

Claims

A positive pressure needle-free injection T-joint device, characterized in that it comprises:

a T-shaped tube having two transverse tube portions communicating with each other in a lateral direction and a longitudinal tube portion longitudinally communicating with the junction of the two lateral tube portions, at least one of the lateral tube portions having a limiting portion and needle-free injection An interface portion, the limiting portion extends toward an inner wall of the lateral tube portion of the lateral tube portion to form and enclose an injection inlet, wherein the needle-free injection interface portion is The outer end portion of the transverse tube portion and having a syringe interface that substantially matches the needleless syringe;

The elastic sealing member is disposed in the lateral pipe portion, and the elastic sealing member has a pressure receiving head, a pressing body and a pressure receiving seat in sequence, and the pressure receiving head has a close portion. The sealing portion substantially closes the syringe interface, the side of the pressure receiving head is formed with a notch portion, and the outer surface of the pressing body and the pressure receiving seat and the lateral direction a flow space is formed between inner surfaces of the tube portions, the pressure receiving seat has a concave portion to form a compression space, and the concave portion is disposed at the limiting portion to cover the inlet of the injection liquid, and a fluid passage connecting the flow space and the inlet of the injection liquid is formed at a boundary between the pressure receiving seat and the limiting portion.

Wherein when the needle-free injector is inserted from the syringe interface, the pressure receiving head of the elastic sealing member is subjected to pressure and is bent through the notch portion, and is subjected to the pressure receiving seat. Pressing inwardly, causing the tight portion of the pressure head to be disengaged from the syringe interface to form an injection external inlet, and the outer surface of the pressure head and the inner portion of the lateral tube a gap space is formed between the surfaces, the injection inlet, the gap space, the flow space, the fluid passage, and the injection inlet are connected to each other to make the The liquid in the needle-free injector flows through the injection inlet, the gap space, the flow space, and the fluid passage to the inlet of the injection solution.

When the needle-free injector is removed from the syringe interface, the elastic sealing member is elastically restored to the original shape, thereby generating a liquid volume difference with respect to the pressure, and the liquid volume difference is opposite to the liquid A positive pressure is formed which flows into the inlet of the injection.
A positive pressure needle-free injection T-joint device according to claim 1, wherein said pressure receiving seat is formed in a hollow hemispherical structure.
A positive pressure needle-free injection T-joint device according to claim 1, wherein said outer diameter of said squeezing body is tapered in a direction of said syringe interface toward said inlet of said injection solution .
The positive pressure needle-free injection T-joint device according to claim 1, wherein the connection between the pressing body and the pressure receiving seat forms an angle greater than 90 degrees.
The positive pressure needle-free injection T-joint device according to claim 1, wherein a hollow space is formed in the inside of the pressing body, and the hollow space communicates with the compression space.
The positive pressure needle-free injection T-joint device according to claim 1, wherein said needle-free injection interface The inner annular surface of the portion is formed with a reduced diameter inner edge portion, and the pressing body has a radially outer edge portion corresponding to the reduced diameter inner edge portion, and the radially outer edge portion is outer The diameter is larger than the inner diameter of the inner diameter portion of the reduced diameter, and the radially outer edge portion is restricted by the inner diameter portion of the reduced diameter.
A positive pressure needle-free injection T-joint device according to claim 1, wherein one of said lateral tube portions includes a cover member and a tubular member that are sleeved with each other, said body member and another body. The lateral tube portion and the longitudinal tube portion are connected, the needle-free injection interface portion is located at the cover body member, and the limiting portion is located at the body member.
A positive pressure needle-free injection T-joint apparatus according to claim 1, wherein said notch portion is a notch formed by a concave portion at a single side of said pressure receiving head.
The positive pressure needle-free injection T-joint apparatus according to claim 1, wherein the outer diameter surface of the pressure receiving seat is provided with a plurality of convex ring portions that are radially convex.
A positive pressure needle-free injection T-joint device according to claim 1, wherein one of said lateral tube portions has said needleless injection interface portion and the other said lateral tube portion serves as an output tube portion. And the longitudinal tube portion as the input tube portion.
A positive pressure needle-free injection T-joint device according to claim 1, wherein said notch portion has an arc shape.