CN203898862U - Needle-free injection positive pressure connector device - Google Patents

Abstract

The utility model relates to a exempt from needle injection positive pressure connector device, contain a casing and an elastic sealing component, the casing includes a lid and a joint seat, the lid has the outer entry of an injection liquid, the joint seat has a liquid through-hole, a liquid channel, and a gas channel, elastic sealing component sets up among the casing and has one and receives the pressure head, a pressure seat, and a connecting piece, it seals the outer entry of injection liquid to receive the pressure head, and the side of pressure head forms a breach portion, it is in the outside of casing for being linked together by gas channel to receive the pressure seat to have a compression space, and make gas channel for keeping apart in the liquid flow space, can produce the liquid malleation when the injection finishes pulling out injection device by this, make injection liquid not remain in the body and blood is difficult for flowing back to the body.

Description

Needle-free injection positive pressure connector device

technical field

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

Background technique

Nursing work plays an important role in the whole medical process, but nursing work is trivial and heavy. In recent years, indwelling needles have been widely used clinically, such as for patients requiring long-term or large-scale infusions, in order to alleviate the pain of patients receiving injections and reduce the number of subcutaneous injections performed by nurses. Generally speaking, the indwelling needle can be left in the vein for several days, and blockage is one of the main reasons why the indwelling needle fails to be used. Tube blockage requires flushing, squeezing, or even subcutaneous puncture again, which not only causes pain to the patient, but also increases medical expenses and the workload of the nursing staff. Therefore, in recent years, a positive pressure joint has been developed to connect the injection tube body of the indwelling needle. The positive pressure joint provides a positive pressure, which not only makes the injected injection liquid less likely to remain in the indwelling needle and the injection tube body, And it can prevent blood from flowing back into the injection tube and coagulating to form a thrombus to cause blockage.

However, in the actual use of the current positive pressure connector, due to its imperfect design, the positive pressure provided is not large enough, which makes the injection propulsion effect poor, the injection liquid remains in the indwelling needle and the blood flows back into the injection tube. It still exists and has not been significantly improved.

Utility model content

The purpose of this utility model is to provide a needle-free injection positive pressure joint device, which is used to install on the injection tube body of the indwelling needle to implement needle-free injection to avoid the implementation personnel from being stuck by the needle, and to provide a large Positive pressure, improving the problem of injection liquid residue and tube blockage in the conventional injection joint device.

The technical means adopted by the utility model to solve the problems of the prior art is a needle-free injection positive pressure connector device, which includes a housing and an elastic sealing member. The casing includes a cover body and a joint seat, the cover body and the joint seat are nested together, and the cover body has an external injection liquid inlet, and the joint seat has a liquid through hole, a liquid channel connected to the liquid through hole, and a communication channel. A gas passage to the exterior of the housing. The elastic sealing member is arranged in the housing, and there is a liquid flow space connected to the liquid through hole between the outer surface of the elastic sealing member and the inner surface of the housing. The elastic sealing member has a pressure head, a pressure seat, And a connecting piece connected between the pressure head and the pressure seat, the top of the pressure head faces and closes the outer inlet of the injection liquid, and a notch is formed on the side of the pressure head, the pressure seat has a recess and A compression space is formed, wherein the concave part covers a gas inlet of the gas passage, so that the compression space is communicated with the outside of the casing through the gas passage, and the gas passage is isolated from the liquid flow space.

In an embodiment of the present invention, the pressure receiving seat is formed as a hollow hemispherical structure.

In one embodiment of the present utility model, the outer diameter of the connector is tapered in the direction from the pressure head to the pressure seat, and the outer diameter of the pressure seat is tapered in the direction from the pressure head to the pressure seat. Expansion, so that the connection between the connecting piece and the pressure seat forms a kink greater than 90 degrees.

In an embodiment of the present invention, the notch is a notch formed by indentation at a position on one side of the pressure receiving head.

In one embodiment of the present invention, a hollow cavity is formed inside the connecting piece, which communicates with the compression space.

In one embodiment of the present invention, the gas channel is arranged around the liquid channel.

In an embodiment of the present invention, the liquid channel has an extended pipe section protruding outward.

In an embodiment of the present invention, the position of the joint seat corresponding to the recess extends toward the compression space.

In an embodiment of the present invention, the pressure receiving seat is arranged in a clamping groove of the joint base, and the bottom of the clamping groove is higher than the lower edge of the liquid through hole in the direction of the pressure receiving head toward the pressure receiving seat.

Through the technical means adopted in the utility model, by virtue of the structural design of the elastic sealing member and the housing, when the syringe is pulled out after injection, the elastic sealing member can quickly rebound and return to its original shape, so that the liquid volume in the housing is relatively large. When the elastic sealing member is compressed by the syringe and the liquid is injected, the difference in liquid volume and the resilience of the elastic sealing member will produce a positive pressure effect, which will enhance the force of the liquid in the housing, so that the liquid passing through the indwelling needle can continue to flow Advance forward without remaining in the indwelling needle, and make it difficult for the blood to flow back into the tube body to form a thrombus and block the tube body.

Description of drawings

FIG. 1 is a perspective view showing a positive pressure connector device for needle-free injection according to an embodiment of the present invention.

FIG. 2 is an exploded view of the positive pressure connector device for needle-free injection according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a positive pressure connector device for needle-free injection according to an embodiment of the present invention.

FIG. 4 is a schematic diagram showing the actual use of the positive pressure joint device for needle-free injection according to an embodiment of the present invention.

FIG. 5 is a schematic diagram showing the positive pressure connector device for needle-free injection according to an embodiment of the present invention when it is connected to a syringe.

FIG. 6 is a schematic diagram showing the state of the needle-free injection positive pressure joint device after the syringe is pulled out according to an embodiment of the present invention.

Symbol Description:

100 needle-free injection positive pressure connector device

1 shell

11 cover body

111 External entrance for injection

12 connector seat

121 liquid through hole

122 liquid channels

1221 Extension Pipe Section

123 gas channels

1231 Gas inner inlet

124 card slot

2 Elastic sealing member

21 pressure head

211 Gap

22 Pressure seat

221 recessed part

23 Connectors

3 organisms

4 indwelling needles

5 tube body

S1 Liquid flow space

S2, S2' compressed space

S3 gap space

S4 hollow cavity

6 syringes

F Downforce

A air

L liquid

θ knuckle

Detailed ways

The specific embodiments adopted by the present utility model will be further described by the following embodiments and attached drawings.

Referring to FIGS. 1 to 3 at the same time, a needle-free injection positive pressure connector device 100 according to an embodiment of the present invention includes a housing 1 and an elastic sealing member 2 .

The housing 1 includes a cover body 11 and a joint seat 12, the cover body 11 and the joint seat 12 are nested together, and the cover body 11 has an injection liquid external inlet 111, and the joint seat 12 has a liquid through hole 121, which communicates with the liquid A liquid channel 122 of the through hole 121 and a gas channel 123 connected to the outside of the casing 1 .

The elastic sealing member 2 is arranged in the housing 1, and there is a liquid flow space S1 communicated with the liquid through hole 121 between the outer surface of the elastic sealing member 2 and the inner surface of the housing 1, and the elastic sealing member 2 has a pressurized The head 21 , a pressure receiving seat 22 , and a connecting piece 23 connected between the pressure receiving head 21 and the pressure receiving seat 22 . The top of the pressure head 21 faces and closes the injection liquid inlet 111 , and a notch 211 is formed on the side of the pressure head 21 to form a notch space S3 . The pressure receiving seat 22 has a concave portion 221 to form a compression space S2, wherein the concave portion 221 covers a gas inlet 1231 of the gas passage 123, so that the compression space S2 is communicated with the outside of the housing 1 through the gas passage 123, And the gas channel 123 is isolated from the liquid flow space S1.

In actual use, as shown in FIG. 4 , the needle-free injection positive pressure joint device 100 is connected to an indwelling needle inserted in a blood vessel (such as a hand vein) of a living body 3 by being connected to a tube body 5 4. In this embodiment, the liquid passage 122 has an extended pipe section 1221 protruding outwards to facilitate communication with the pipe body 5 to be connected.

When injecting, as shown in FIG. 5 , the user aligns the nozzle of a syringe 6 with the injection liquid inlet 111 and applies a pressure F to the top of the pressure receiving head 21 to perform the injection. At this time, the injection liquid outer inlet 111 changes its closed state due to the downward force F pressing down on the pressure receiving head 21 . Because the elastic sealing member 2 is deformed by the downward force F, the originally disconnected liquid flow space S1 and the gap space S3 communicate with each other. At this time, the compression space S2' (Fig. 5) is also due to the downward force F being transmitted from the pressure receiving head 21 to the pressure receiving seat 22 through the connecting piece 23, which deforms the pressure receiving seat 22 and squeezes the air A in it into the air through the air. The channel 123 discharges to the outside of the housing 1 and makes the compressed space S2' (FIG. 5) smaller than the compressed space S2 (FIG. 3) when not pressurized. When the user performs an injection action with the syringe 6 , the liquid L in the syringe 6 enters the liquid flow space S1 from the injection liquid outer inlet 111 through the gap space S3 .

When the injection is completed and the syringe 6 is pulled out, as shown in FIG. 6 , the applied downward force F is released, and the elastic sealing member 2 rebounds so that the air A outside the housing 1 enters the compressed space S2 through the gas passage 123 and is compressed. Seat 22 expands and returns to the original state. At the same time, the top of the pressure receiving head 21 re-closes the outer inlet 111 of the injection liquid, and the gap space S3 and the liquid flow space S1 return to the isolated state. Therefore, it can be seen from the above structural changes that because the pressure receiving seat 22 expands and returns to its original state, and the notch space S3 and the liquid flow space S1 return to the isolated state again, the notch space S3 and the liquid flow space S1 injected into the casing 1 in the original injection state will be compressed. The liquid L in the liquid flow space S1 (Fig. 5) will cause a liquid volume difference. At this time, the liquid volume difference and the elastic sealing member 2 will generate a positive pressure due to the resilience of the recovery shape, so that the liquid in the liquid flow space S1 The liquid L enters the liquid channel 122 through the liquid through hole 121 to be propelled by positive pressure, and further enters the tube body 5 to the indwelling needle 4 to be injected into the living body 3 ( FIG. 4 ). Since the liquid L is propelled by positive pressure, the liquid L in the tube body 5 can completely enter the living body 3 without remaining therein, and the blood of the living body 3 is not easy to flow back into the tube body 5 and form a thrombus therein. More preferably, the pressure receiving seat 22 and the connecting piece 23 are in communication and both are hollow structures that are easy to be compressed. If the downward force F applied to the needle-free injection positive pressure joint device 100 is large enough, the hollow cavity S4 of the connecting piece 23 will also Compressed together with the compressed space S2, a larger positive pressure can be generated.

In this embodiment, the outer diameter of the connector 23 is tapered in the direction from the pressure head 21 to the pressure seat 22, and the outer diameter of the pressure seat 22 is tapered in the direction from the pressure head 21 to the pressure seat 22. Gradual expansion, so that the connection between the connecting piece 23 and the pressure receiving seat 22 forms a kink angle θ greater than 90 degrees, and the notch 211 is a notch formed by indentation at one side of the pressure receiving head 21, through the above design When a pressure F is applied during injection, the elastic sealing member 2 is more likely to fall in the direction of the notch 211, thereby creating a gap so that the notch space S3 and the liquid flow space S1 are in a state of communication, so that the injected liquid L flows more smoothly. Enter the liquid flow space S1.

In this embodiment, the gas passage 123 is disposed around the liquid passage 122 so that the air A can be discharged and sucked smoothly. The joint seat 12 extends toward the compression space S2 at the position corresponding to the concave portion 221 , and reliably separates the gas channel 123 and the liquid channel 122 to prevent the liquid L from flowing into the gas channel 123 .

In this embodiment, the pressure receiving seat 22 is arranged in a clamping groove 124 of the joint base 12, and the bottom of the clamping groove 124 is higher than the lower edge of the liquid through hole 121 in the direction of the pressure receiving head 21 toward the pressure receiving seat 22. In this position, the pressure receiving seat 22 is prevented from blocking the liquid through hole 121 , and the liquid L can be ensured to enter the liquid through hole 121 from the liquid flow space S1 .

The above narration is only a description of the preferred embodiment of the present utility model, and those who are proficient in this skill can make other various improvements according to the above-mentioned description, but these changes still belong to the creative spirit and defined limits of the present utility model. within the scope of the patent.

Claims (9)

1. exempt from a pin injection positive pressure connector device, it is characterized in that, it comprises:

One housing, comprise a lid and a plinth, the socket mutually of this lid and this plinth system, and this lid has the outer entrance of an injection, and this plinth has a liquid through-hole, is communicated in a fluid passage of this liquid through-hole and is communicated to an outside gas passage of this housing; And

One flexible sealing component, be arranged among this housing, between the outer surface of this flexible sealing component and the inner surface of this housing, there is a liquid flow space that is communicated in this liquid through-hole, this flexible sealing component has one to be subject to pressure head, to be subject to wedge and to be connected in this to be subject to pressure head and this to be subject to a connection piece between wedge, this top that is subject to pressure head just to and seal the outer entrance of this injection, and this is subject to the side of pressure head to be formed with a notch part, this is subject to wedge to have a recess and forms a compression stroke

Wherein this recess covers entrance in a gas of this gas passage, is the outside that is communicated in this housing by this gas passage and make this compression stroke, and this gas passage is for being isolated from this liquid flow space.

2. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this is subject to wedge system to be formed as the semiglobe of a hollow.

3. the pin injection positive pressure connector device of exempting from as claimed in claim 1, it is characterized in that, the external diameter of this connector lies in and is subject to pressure head by this to be subject to the direction of wedge be convergent towards this, and this is lain in by the external diameter of wedge to be subject to pressure head by this that to be subject to the direction of wedge be flaring towards this, this connector and this are subject to the junction of wedge to be formed with a knuckle that is greater than 90 degree.

4. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this notch part is the breach that formed by an one-sided position indent of pressure head by this.

5. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, the inside of this connector is formed with a cavity, is communicated in this compression stroke.

6. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this gas passage system is compassingly set at this fluid passage.

7. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this fluid passage has an extension pipeline section outwards protruding out.

8. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this plinth is in being to extend to this compression stroke corresponding to the position of this recess.

9. the pin injection positive pressure connector device of exempting from as claimed in claim 1, is characterized in that, this is subject to wedge system to be arranged at a clamping groove of this plinth, and the bottom of this clamping groove is subject to pressure head to be subject to the direction system of wedge higher than the lower edge position of this liquid through-hole towards this in this.