TWM520907U - T-shaped connector device of positive pressure needle-free injection - Google Patents

Description

Positive pressure needle-free injection T-joint device

This creation relates to a needle-free injection T-joint device, in particular to a positive pressure needle-free injection T-joint device.

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 the patient's repeated puncture and reduce the workload of the medical staff, a venous indwelling needle or an indwelling catheter is inserted into the patient's body, and the intravenous indwelling needle or the indwelling catheter is usually connected to the tee. Connector, such as a T-connector. The three ends of the T-joint are respectively a needle-free injection joint, a needle joint, and an infusion sleeve joint. The needle-free injection joint is used to connect a needle-free injector, and the medical staff can use a needle-free syringe to inject a plurality of infusions or The drug is injected 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. In recent years, it has been developed to connect with the needle-free injection joint by using a positive pressure joint, and the positive pressure joint provides a positive pressure to compare the liquid medicine. It does not remain in the indwelling needle or catheter and avoids returning blood.

However, the conventional positive pressure joint structure is complicated, and it is an urgent problem to be solved in terms of economic cost consideration.

Therefore, the purpose of this creation is to provide a positive pressure needle-free injection T-joint device to simplify its structure.

The present invention provides a positive pressure needle-free injection T-joint device for solving the problems of the prior art, comprising: a T-shaped tube having two lateral tubes communicating laterally with each other and a longitudinal communication a longitudinal tube portion of the junction of the two lateral tube portions, at least one of the lateral tube portions has a limiting portion and a needleless injection interface portion, the limiting portion is disposed on an inner wall of the lateral tube portion facing the lateral direction The annular portion of the tube portion extends to define and enclose an injection inlet port, the needle-free injection interface portion is an outer end portion of the lateral tube portion and has a syringe interface substantially matching a needle-free injector; and an elastic seal a member disposed in the lateral tube portion, the elastic sealing member sequentially has a pressure receiving head, a pressing body, and a pressure receiving seat, the pressure receiving head having a close portion, the tight portion The syringe interface is substantially tightly closed, and a side of the pressure receiving head is formed with a notch portion, and a flow space is formed between the pressing body and the outer surface of the pressure receiving seat and the inner surface of the lateral tube portion. The seat has a recess to form a pressure a recessed portion is disposed in 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 head of the elastic sealing member is pressed and bent by the notch portion, and is indented by the pressure of the pressure receiving seat. And the sealing portion of the pressure head is separated from the syringe interface to form an injection external inlet, and a gap space is formed between the outer surface of the pressure head and the inner surface of the lateral tube portion, and the injection inlet is externally The gap space, the flow space, the fluid passage, and the inlet of the injection solution are in communication with each other such that a liquid in the needle-free injector passes through the injection inlet, the gap space, the flow space, and the a fluid passage flows to the inlet of the injection liquid, and when the needle-free injector is detached from the syringe interface, the elastic sealing member elastically returns to the original shape, and a liquid volume difference is generated with respect to the pressure, the liquid The difference in volume of the body causes a positive pressure on the liquid to the inlet of the injection.

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

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, the outer diameter of the compression body being tapered toward the syringe inlet toward the inlet of the injection fluid.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and an intersection of the pressure body and the pressure seat is formed at an angle greater than 90 degrees.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, and a hollow space is formed inside the pressure body, 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 an inner annular surface of the needle-free injection interface portion is formed with a reduced diameter inner edge portion, and the pressure body has a corresponding a radially outer edge portion of the inner diameter portion of the reduced diameter, wherein an outer diameter of the radially outer edge portion is larger than an inner diameter of the inner diameter portion of the reduced diameter, such that the radially outer edge portion receives the inner diameter portion of the reduced diameter Limits.

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 to each other, and the tubular body member and the other lateral portion The tube portion and the longitudinal tube portion are connected, and the needle-free injection interface portion is located at the cover 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, the notch portion being a notch formed by a recess at one side of the pressure 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, there is provided a positive pressure needle-free injection T-joint device, one of the lateral tube portions having the needle-free injection interface portion, and the other of the lateral tube portions as an output tube portion, and the longitudinal portion The tube is used as an input tube.

In an embodiment of the present invention, a positive pressure needle-free injection T-joint device is provided, the notch portion being curved.

Through the technical means adopted in the present creation, when the needle-free syringe is pulled out by the injection, the elastic sealing member can elastically return to the original shape and generate a positive pressure, so that the liquid in the lateral pipe portion can continue from the inlet of the previous injection liquid. Advance, avoiding liquid residue and blood return. Moreover, the elastic sealing member of the present invention has a simple structure, thereby improving the economic cost.

Embodiments of the present creation will be described below based on Figs. 1 to 7 . This description is not intended to limit the implementation of the present invention, but is one of the embodiments of the present invention.

As shown in FIGS. 1-3, 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 communicated with 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 a needleless injector I, and the other lateral tube portion 11' serves as an output tube. For connecting a needle N. The longitudinal tube portion 12 serves as an input tube portion for connecting an infusion set B. Of course, this creation is not limited to this. In other embodiments, the two lateral tubes each have a needleless injection interface for injection into a different liquid, and the longitudinal tube serves as an output tube.

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

At the same time, as shown in Figures 2 and 4, the tubular member 112 is coupled to the other of the lateral tubular portion 11' and the longitudinal tubular portion 12. The body member 112 includes a limiting portion 114 and a supporting portion 115. The limiting portion 114 and the supporting portion 115 are disposed on the inner wall surface 116 of the tubular member 112 of the lateral tubular portion 11 toward the lateral tubular portion 11. The center of the body of the tubular member 112 extends to enclose an injection 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, this creation is not limited to this. In other embodiments, the number of the limit portions 114 may vary.

As shown in FIGS. 2 and 4, the needle-free injection interface unit 111 is provided in the cover member 113. The needle-free injection interface portion 111 has 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. Further, the inner surface of the needle-free injection interface portion 111 The projection forms 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 receiving seat 23 in sequence. .

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. The notch portion 212 is a notch formed by a recess at one side of the pressure receiving head 21. In detail, in the embodiment, the notch portion 212 is curved, and the arc formed by the arc makes the notch portion 212 easy to bend and deform, and the needle-free injector 1 can be further reduced to be inserted into the syringe interface 1111. The strength required. 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 such that the radially outer edge portion 221 is limited by the reduced diameter inner edge portion 1112. The pressure body 22 and the outer surface of the pressure receiving seat 23 and the inner surface of the lateral tube portion 11 have a flow space S2. The pressure receiving seat 23 is formed as a hollow hemispherical structure having a recess 231 and a plurality of convex ring portions 232. The concave portion 231 is formed with a compression space S3 connected to the hollow space S1, and is disposed on the limiting portion 114 to cover the injection liquid inlet 117, and at the boundary between the pressure receiving seat 23 and the limiting portion 114. A fluid passage P communicating with the flow space S2 and the inlet 117 of the injection liquid is formed. 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 for increasing the pressure receiving seat. The elastic restoring force of 23 enables the elastic sealing member 2 to rebound quickly to restore the original shape when the needle-free injector 1 is pulled out from the syringe interface 1111. Of course, the present invention is not limited to the formation of the plurality of convex ring portions 232 on the outer diameter surface of the pressure receiving seat 23. As shown in Fig. 7, the outer diameter surface of the pressure receiving seat 23a of the elastic sealing member 2a can be smooth without projections, thereby facilitating manufacture to simplify the process.

Preferably, in the embodiment, in order to make the elastic sealing member 2 easy to bend toward the notch portion 212, the outer diameter of the pressing body 22 is in the direction of the injector port 1111 toward the injection inlet 117. To be tapered, an angle θ greater than 90 degrees is formed at the junction of the pressure body 22 and the pressure seat 23.

As shown in FIG. 5, when the needle-free injector 1 is inserted from the syringe interface 1111, the pressure receiving head 21 of the elastic sealing member 2 is pressed and bent by the notch portion 212, and by the The pressure seat 23 is pressed inwardly to retract the contact portion 211 of the pressure receiving head 21 from the syringe interface 1111 to form an injection external inlet 118, and the outer surface of the pressure receiving head 21 and the lateral tube A notch space S4 is formed between the inner surfaces of the portion 11, and the injection liquid outer inlet 118, the notch space S4, the flow space S2, the fluid passage P, and the injection liquid inlet 117 communicate with each other to make the needleless A liquid L in the syringe I flows through the injection outer inlet 118, the notch space S4, the flow space S2, and the fluid passage P to the injection liquid inlet 117.

As shown in FIG. 6, when the needle-free injector I is detached from the syringe interface 1111, the elastic sealing member 2 elastically returns to the original shape, and a liquid volume difference is generated with respect to the pressure, and the liquid volume difference is The liquid L causes a positive pressure to flow into the inlet 117 of the injection.

The above description and description are only illustrative of the preferred embodiments of the present invention, and those having ordinary skill in the art may make other modifications in accordance with the scope of the patent application as defined below and the above description, but such modifications are still It is the creative spirit of this creation and is within the scope of this creation.

100‧‧‧ Positive pressure needle-free injection T-joint device
1‧‧‧T-tube
11, 11' ‧ ‧ horizontal pipe department
111‧‧‧ Needle-free injection interface
1111‧‧‧Syringe interface
1112‧‧‧Reducing the inner edge of the diameter
112‧‧‧ body parts
113‧‧‧ covers
114‧‧‧Limited
115‧‧‧Support
116‧‧‧ inner wall
117‧‧‧Injection into the mouth
118‧‧‧Injection outside the entrance
12‧‧‧ longitudinal tube
2, 2a‧‧‧ elastic sealing member
21‧‧‧Indented head
211‧‧‧ 密部
212, 212a‧‧‧ gap
22‧‧‧Compressed body
221‧‧‧radial outer edge
23, 23a‧‧‧ under pressure seat
231‧‧‧ recess
232‧‧‧ convex ring
B‧‧‧ Infusion set
D1‧‧‧ outside diameter
D2‧‧‧ inside diameter
I‧‧‧ needleless syringe
N‧‧‧ needle
P‧‧‧ fluid pathway
S1‧‧‧ hollow space
S2‧‧‧ mobile space
S3‧‧‧Compressed space
S4‧‧‧ notched space θ‧‧‧ angle

1 is a plan view showing a positive pressure needle-free injection T-joint device according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a positive pressure needle-free injection T-joint device according to an embodiment of the present invention. Fig. 3 is a schematic view showing a positive pressure needle-free injection T-joint device according to an embodiment of the present invention in use. Fig. 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. Fig. 5 is a cross-sectional view showing the positive pressure needle-free injection T-joint device according to the embodiment of the present invention in use. Fig. 6 is a cross-sectional view showing the positive pressure needle-free injection T-joint device according to the embodiment of the present invention in use. Fig. 7 is a schematic view showing an elastic sealing member according to another embodiment of the present creation.

100‧‧‧ Positive pressure needle-free injection T-joint device

1‧‧‧T-tube

11, 11' ‧ ‧ horizontal pipe department

111‧‧‧ Needle-free injection interface

1111‧‧‧Syringe interface

1112‧‧‧Reducing the inner edge of the diameter

112‧‧‧ body parts

113‧‧‧ covers

114‧‧‧Limited

115‧‧‧Support

116‧‧‧ inner wall

117‧‧‧Injection into the mouth

12‧‧‧ longitudinal tube

2‧‧‧Elastic sealing member

21‧‧‧Indented head

211‧‧‧ 密部

212‧‧‧ gap

22‧‧‧Compressed body

221‧‧‧radial outer edge

23‧‧‧ Pressure seat

231‧‧‧ recess

232‧‧‧ convex ring

D1‧‧‧ outside diameter

D2‧‧‧ inside diameter

P‧‧‧ fluid pathway

S1‧‧‧ hollow space

S2‧‧‧ mobile space

S3‧‧‧Compressed space

Θ‧‧‧ angle

Claims (11)

A positive pressure needle-free injection T-joint device comprising: a T-shaped tube having two transverse tube portions communicating with each other laterally and a longitudinal tube portion longitudinally communicating with the junction of the two lateral tube portions, at least one The lateral tube portion has a limiting portion and a needleless injection interface portion. The limiting portion is formed on an inner wall of the lateral tube portion and extends toward the center of the lateral tube portion to form an injection inlet. The needle-free injection interface portion has a syringe interface substantially matching the outer end portion of the lateral tube portion and substantially matching a needle-free injector; and an elastic sealing member disposed in the lateral tube portion, the elastic sealing member being Connectedly, there is a pressure receiving head, a pressing body, and a pressure receiving seat, the pressure receiving head has a sealing portion, the sealing portion is substantially close to the syringe interface, and the side of the pressure receiving head is formed a gap portion having a flow space between the outer surface of the pressure body and the pressure seat and the inner surface of the lateral tube portion, the pressure seat having a recess to form a compression space, the recess being disposed at the limit Covering the inlet of the injection solution 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 elastic sealing member is The pressure head is subjected to pressure and bent by the notch portion, and is retracted inwardly by the pressure of the pressure receiving seat, so that the pressure receiving portion is separated from the syringe interface to form an injection. a liquid external inlet, and a gap space formed between the outer surface of the pressure head and 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 a liquid in the needle-free injector flows through the injection inlet, the gap space, the flow space, and the fluid passage to the injection inlet, when the needle-free injector When the syringe interface is removed, the elastic sealing member elastically returns to the original shape, and a liquid volume difference is generated with respect to the pressure, the liquid volume difference is a flow to the liquid into the inlet of the injection liquid. Pressure. The positive pressure needle-free injection T-joint device according to claim 1, wherein the pressure seat is formed into a hollow hemispherical structure. The positive pressure needle-free injection T-joint device according to claim 1, wherein the outer diameter of the pressing body is tapered in a direction in which the syringe interface faces the inlet of the injection liquid. The positive pressure needle-free injection T-joint device according to claim 1, wherein the connection between the pressure body and the pressure 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 interior of the pressure body, and the hollow space is connected to the compression space. The positive pressure needle-free injection T-joint device according to claim 1, wherein the inner ring surface of the needle-free injection interface portion is convexly formed with a reduced diameter inner edge portion, and the pressure body has a diameter corresponding to the reduction a radially outer edge portion of the inner edge portion, wherein the outer diameter of the radially outer edge portion is larger than the inner diameter of the inner diameter portion of the reduced diameter, so that the radially outer edge portion is limited by the inner edge portion of the reduced diameter portion . The positive pressure needle-free injection T-joint device according to claim 1, wherein one of the lateral tube portions includes a cover member and a tubular member that are sleeved with each other, and the tubular body member and the other lateral tubular portion are The longitudinal tube portion is connected, and the needleless injection interface portion is located at the cover member, and the limiting portion is located at the body member. The positive pressure needle-free injection T-joint device according to claim 1, wherein the notch portion is a notch formed by a recess at one side of the one of the pressure receiving heads. The positive pressure needle-free injection T-joint device according to claim 1, wherein the outer diameter surface of the pressure receiving seat is provided with a plurality of convex convex portions protruding radially The positive pressure needle-free injection T-joint device according to claim 1, wherein one of the lateral tube portions has the needle-free injection interface portion, and the other of the lateral tube portions serves as an output tube portion, and the longitudinal tube portion As an input pipe. The positive pressure needle-free injection T-joint device according to claim 1, wherein the notch portion is curved.