TWM520906U - Top cover apparatus of positive-pressure needleless-injection precise intravascular administration set - Google Patents

Description

Positive pressure needle-free injection precision infusion set top cover device

The present invention relates to a needle-free injection precision infusion set upper cover device, in particular to a positive pressure-free needle injection precision infusion set upper cover device.

Intravenous infusion is one of the main means of clinical treatment, and precision infusion sets are one of the commonly used tools for intravenous infusion. The precision infusion set is mainly used to inject a special drip or drug into the blood of the human body, which can help control the infusion amount of the drug into the human body. It is commonly used in clinical practice when it is necessary to strictly monitor the infusion volume of the patient, such as emergency or severe illness. Patients, use of anesthetics, and use of antibiotics. In general, the precision infusion set includes a measuring cylinder and an upper cover, and the upper cover is placed on the top of the measuring cylinder. The outer surface of the upper cover respectively protrudes upward with three tube portions, and the three tube portions are respectively an air guiding tube, an infusion tube, and a medicated tube. The medicated tube is used to connect a needle-free injector, and the medical staff injects a plurality of infusions or medicaments into the measuring cylinder by the needle-free injector.

In order to avoid the tube clogging caused by the residual drug solution during injection, in recent years, it has been developed to connect with the medicated tube by using a positive pressure joint, and the positive pressure joint provides a positive pressure, so that the liquid medicine is relatively not Remains in the medicated tube.

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 the present invention is to provide a positive pressure needle-free injection precision infusion cap upper cover device to simplify its structure.

The technical means adopted by the present invention for solving the problems of the prior art provides a positive pressure needle-free injection precision infusion set upper cover device, comprising: an upper cover, a medicated tube, an infusion tube protruding upwardly on the outer surface, respectively And a gas guiding tube, wherein the feeding tube, the infusion tube, and the air guiding tube are respectively connected to the inner wall surface of the upper cover through the upper cover, wherein the feeding tube has a limiting portion and a needle-free injection An interface portion formed by an inner wall of a medicated tube of the medicated tube extending toward a center of the medicated tube and enclosing an injection inlet, the needle-free injection interface portion being the urging portion a syringe port having a substantially matching needle-free injector; and an elastic sealing member disposed in the medicating tube, the elastic sealing member sequentially having a pressure head and a pressure a moving 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 a side of the pressure receiving head is formed with a notch portion, the pressing body and the receiving body The outer surface of the pressure seat and the inner surface of the medicated tube Having a flow space therebetween, the pressure seat has a recess to form a compression space, the recess is disposed at the limit portion to cover the inlet of the injection liquid, and at the boundary between the pressure seat and the limit portion Forming a fluid passage connecting the flow space and the inlet of the injection liquid, 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 Folding, and inwardly retracting by compression of the pressure receiving seat to form a compressed body, the adhesion portion of the pressure receiving head is separated from the syringe interface to form an injection external inlet, and the pressure head is A gap space is formed between the outer surface and the inner surface of the medicated tube, and the injection outer inlet, the gap space, the flow space, the fluid passage, and the inlet of the injection solution communicate with each other to make the needle-free a liquid in the syringe flows through the injection inlet, the gap space, the flow space, and the fluid passage to the inlet of the injection liquid, and the elastic needle is removed when the needle-free injector is detached from the syringe interface Elastic member returns to the original article, to generate a volume of liquid under pressure with respect to time difference, the difference between the volume of liquid to the liquid line caused by a positive flow of fluid within the injection inlet.

In an embodiment of the present invention, a positive pressure needle-free injection precision infusion set upper cover 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 precision infusion cap upper cover device is provided, the outer diameter of the compression body being tapered in a direction of the syringe interface toward the inlet of the injection solution.

In an embodiment of the present invention, a positive pressure needle-free injection precision infusion set upper cover device is provided, and an intersection of the pressure 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 precision infusion cap upper cover 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 precision infusion sleeve upper cover device is provided, wherein the inner annular surface of the needle-free injection interface portion is convexly formed to have a reduced diameter inner edge portion, and the pressure body has Corresponding to a radially outer edge portion of the inner diameter portion of the reduced diameter, 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 radially outer edge portion receives the reduced diameter The limit of the edge.

In an embodiment of the present invention, a positive pressure needle-free injection precision infusion set upper cover device is provided, the medicated tube includes a cover member and a tubular member that are sleeved with each other, and the needle-free injection interface portion is located The cover member is located on the body member.

In an embodiment of the present invention, there is provided a positive pressure needle-free injection precision infusion cap upper cover device, the notch portion being a notch formed by a recess at one side of the pressure receiving head.

In an embodiment of the present invention, a positive pressure needle-free injection precision infusion set upper cover device is provided, and the infusion tube is located between the medicated tube and the air guide tube.

In an embodiment of the present invention, a positive pressure needle-free injection precision infusion cap upper cover 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 precision infusion set upper cover device is provided, the notch portion being curved.

Through the technical means adopted in the present creation, when the needle-free injector is pulled out by the injection, the elastic sealing member can elastically return to the original shape and generate a positive pressure, which makes the liquid in the medicinal tube obtain the inlet of the previous injection solution. Go ahead and avoid 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 precision infusion cap upper cover device 100 according to an embodiment of the present invention includes an upper cover 1 and an elastic sealing member 2.

In detail, the upper cover 1 protrudes upwardly from the outer surface O with a filling tube 11, an infusion tube 12, and an air guiding tube 13, and the feeding tube 11, the infusion tube 12, and the air guiding tube respectively penetrate the The upper cover 1 is connected to an inner wall surface A of the upper cover 1. In the present embodiment, the infusion tube 12 is located between the medicated tube 11 and the air guiding tube 13.

As shown in FIG. 3, in the present embodiment, the positive pressure needle-free injection precision infusion set upper cover device 100 is placed in a measuring cylinder C, and the filling tube 11 has a needleless injection interface portion 111 for connecting one. The needleless syringe I is used to connect an infusion set B.

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

As shown in FIG. 2 and FIG. 4 , 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 tubular member 112 of the filling tube 11 . A medicinal tube inner wall surface 116 extends toward the center of the body member 112 of the medicated tube 11 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 is an outer end portion of the cover member 113 of the medicated tube 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 medicinating tube 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 medicinal tube 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 head 21 and the dosing A notch space S4 is formed between the inner surfaces of the tube 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 injection precision infusion set top cover device
1‧‧‧Upper cover
11‧‧‧Dosing tube
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‧‧‧Drug tube inner wall
117‧‧‧Injection into the mouth
118‧‧‧Injection outside the entrance
12‧‧‧ Infusion tube
13‧‧‧ air duct
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
A‧‧‧ inner wall
B‧‧‧ Infusion set
C‧‧‧ measuring barrel
D1‧‧‧ outside diameter
D2‧‧‧ inside diameter
I‧‧‧ needleless syringe
L‧‧‧Liquid
O‧‧‧ outer surface
P‧‧‧ fluid pathway
S1‧‧‧ hollow space
S2‧‧‧ mobile space
S3‧‧‧Compressed space
S4‧‧‧ notched space θ‧‧‧ angle

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a positive pressure needle-free injection precision infusion cap upper cover device according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing the positive pressure needle-free injection precision infusion cap upper cover device according to the embodiment of the present invention. Fig. 3 is a schematic view showing the use of a positive pressure needle-free injection precision infusion cap upper cover device in accordance with an embodiment of the present invention. Fig. 4 is a cross-sectional view showing a stopper of a positive pressure needle-free injection precision infusion cap upper cover device according to an embodiment of the present invention. Fig. 5 is a cross-sectional view showing the positive pressure needle-free injection precision infusion cap upper cover device in use according to an embodiment of the present invention. Fig. 6 is a cross-sectional view showing the positive pressure needle-free injection precision infusion cap upper cover device in use according to the embodiment of the present invention. Fig. 7 is a schematic view showing an elastic sealing member according to another embodiment of the present creation.

100‧‧‧ Positive pressure needle injection precision infusion set top cover device

1‧‧‧Upper cover

11‧‧‧Dosing tube

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‧‧‧Drug tube inner wall

117‧‧‧Injection into the mouth

12‧‧‧ Infusion tube

13‧‧‧ air duct

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

A‧‧‧ inner wall

D1‧‧‧ outside diameter

D2‧‧‧ inside diameter

O‧‧‧ outer surface

P‧‧‧ fluid pathway

S1‧‧‧ hollow space

S2‧‧‧ mobile space

S3‧‧‧Compressed space

Θ‧‧‧ angle

Claims (11)

A positive pressure needle-free injection precision infusion set upper cover device comprises: an upper cover, a medicated tube, an infusion tube and an air guiding tube respectively protruding outwardly on the outer surface, and the medicating tube, the infusion tube, and The air guiding tube is connected to the inner wall surface of the upper cover through the upper cover, wherein the medicating tube has a limiting portion and a needleless injection interface portion, and the limiting portion is inside the medicated tube a wall extending toward the center of the medicated tube to form and enclose an injection inlet, the needle-free injection interface portion being an outer end portion of the medicated tube having a syringe interface substantially matching a needle-free injector; And an elastic sealing member disposed in the medicinating tube, 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 tight portion. The sealing portion is substantially close to the syringe interface, 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 charging tube The pressure seat has a recess to form a compressed air The recess 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 head of the elastic sealing member is pressed and bent by the notch portion, and is inwardly retracted by the pressure of the pressure receiving seat. Forming a compression body, the adhesion portion of the pressure head is separated from the syringe interface to form an injection external inlet, and a gap is formed between the outer surface of the pressure head and the inner surface of the medicinal tube. The injection external inlet, the gap space, the flow space, the fluid passage, and the inlet of the injection medium communicate with each other such that a liquid in the needle-free injector passes through the injection inlet, the gap space, the flow a space, and the fluid passage flows to the inlet of the injection liquid, when the needle-free injector is detached from the syringe interface, the elastic sealing member elastically returns to the original shape, and generates a liquid volume relative to the pressure Difference, the difference between the volume of liquid to the liquid line caused by a positive flow of fluid within the injection inlet. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the pressure receiving seat is formed into a hollow hemispherical structure. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the outer diameter of the pressure body is tapered in a direction of the syringe interface toward the inlet of the injection liquid. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the connection between the pressure body and the pressure receiving seat forms an angle greater than 90 degrees. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the inside of the pressure body is formed with a hollow space, and the hollow space is connected to the compression space. The positive pressure needle-free injection precision infusion cap upper cap device according to claim 1, wherein the inner ring surface of the needleless injection interface portion is convexly formed with a reduced diameter inner edge portion, and the pressing body has a corresponding a radially outer edge portion of the inner diameter portion of the reduced diameter, the outer diameter of the radially outer edge portion being larger than the inner diameter of the inner diameter portion of the reduced diameter, such that the radially outer edge portion is subjected to the inner diameter portion of the reduced diameter Limit. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the medicated tube comprises a cover member and a tubular member that are sleeved with each other, and the needle-free injection interface portion is located at the cover body The limiting portion is located in the tubular body. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the notch portion is a notch formed by a recess at one side of the pressure receiving head. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the infusion tube is located between the medicated tube and the air guiding tube. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the outer diameter surface of the pressure receiving seat is provided with a plurality of convex ring portions protruding radially. The positive pressure needle-free injection precision infusion cap upper cover device according to claim 1, wherein the notch portion is curved.