TWM481740U - Needle-free injection positive pressure connector device - Google Patents

Description

Needle-free injection positive pressure joint device

The present invention relates to an injection joint device, and more particularly to a needle-free injection positive pressure joint device.

Nursing work plays an important role in the entire medical process, but the nursing work is trivial and cumbersome. In recent years, in order to alleviate the pain of patients during injection and to reduce the number of subcutaneous injections by caregivers, indwelling needles have been widely used clinically, for example, for patients requiring long-term or large infusion. In general, the indwelling needle can be left in the vein for several days, and the plugging tube is one of the main reasons why the indwelling needle fails to be used and cannot be used. The occurrence of tube plugging requires flushing, squeezing, or even re-implementing a subcutaneous puncture, which not only causes pain to the patient, but also increases medical expenses and the workload of the nursing staff. Therefore, in recent years, it has been developed to use a positive pressure joint to connect with the injection tube of the indwelling needle, and a positive pressure is provided by the positive pressure joint, so that the injection liquid injected not only does not remain in the indwelling needle and the injection tube body, And it can prevent blood from flowing back into the injection tube body and solidify to form a thrombus and cause blockage.

However, in the actual use of the current positive pressure joint, the positive pressure provided is not large enough due to the lack of perfect design, so that the injection advancement effect is not good, the injection liquid remains in the indwelling needle and the blood flows back to the injection tube body. Still exists and has not been significantly improved.

Therefore, the purpose of this creation is to provide a needle-free injection positive pressure connection. The head device is installed on the injection tube body of the indwelling needle to perform needle-free injection to avoid the needle sticking of the implementer, and to provide a large positive pressure efficiently, and to improve the residual liquid of the injection in the conventional injection joint device. The problem of blockage of the pipe.

The technical means used by this creation to solve the problems of the prior art is A needle-free injection positive pressure joint device comprising a casing and an elastic sealing member. The housing comprises a cover body and a joint seat, the cover body and the joint seat are sleeved with each other, and the cover body has an injection external inlet, the joint seat has a liquid through hole, a liquid passage communicating with the liquid through hole, and the connection a gas passage to the outside of the housing. The elastic sealing member is disposed in the housing, and a liquid flow space communicating with the liquid through hole is formed between the outer surface of the elastic sealing member and the inner surface of the housing, and the elastic sealing member has a pressure receiving head and a pressure receiving seat. And a connecting member connected between the pressure receiving head and the pressure receiving seat, the top of the pressure receiving head is opposite to and closes the outer inlet of the injection liquid, and a side of the pressure receiving head is formed with a notch portion, and the pressure receiving seat has a concave portion A compression space is formed, wherein the recess covers the gas inlet of one of the gas passages, and the compression space is communicated to the outside of the casing by the gas passage, so that the gas passage is isolated from the liquid flow space.

In an embodiment of the present creation, the pressure seat is formed as a hollow half Ball structure.

In an embodiment of the present invention, the outer diameter of the connecting member is from the pressure head The direction toward the pressure seat is tapered, and the outer diameter of the pressure seat is divergent in the direction from the pressure head toward the pressure seat, so that a joint angle of more than 90 degrees is formed at the joint of the connecting member and the pressure seat.

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

In an embodiment of the present invention, the inside of the connecting member is formed with a middle The cavity is connected to the compression space.

In an embodiment of the present creation, the gas passage is disposed around the liquid passage.

In an embodiment of the present invention, the liquid passage has an extended tubular section that projects outwardly.

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

In an embodiment of the present invention, the pressure receiving seat is disposed at one of the clamping seats of the joint seat, 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 present creation, by the structural design of the elastic sealing member and the casing, when the syringe injection is completed, the elastic sealing member can quickly rebound back to the original shape, so that the liquid volume in the casing is relative to The elastic sealing member is compressed by the syringe to be small when injecting the liquid, and the liquid volume difference and the resilience of the elastic sealing member produce a positive pressure effect, and the force of the liquid in the propelling housing is enhanced, so that the liquid passing through the indwelling needle can continue to move forward. Advance, and will not remain in the indwelling needle, and the blood will not easily flow back into the tube to form a thrombus and block the tube.

The specific embodiments of the present invention will be further described by the following examples and accompanying drawings.

100‧‧‧With-needle injection positive pressure joint device

1‧‧‧shell

11‧‧‧ Cover

111‧‧‧Injection outside the entrance

12‧‧‧ connector seat

121‧‧‧Liquid through hole

122‧‧‧Liquid channel

1221‧‧‧Extended pipe section

123‧‧‧ gas passage

1231‧‧‧ gas inlet

124‧‧‧ card slot

2‧‧‧Elastic sealing member

21‧‧‧Indented head

211‧‧‧ nicks

22‧‧‧ Pressure seat

221‧‧‧ recess

23‧‧‧Connecting parts

3‧‧‧ organisms

4‧‧‧Indwelling needle

5‧‧‧pipe body

S1‧‧‧Liquid flow space

S2, S2'‧‧‧Compressed space

S3‧‧‧ gap space

S4‧‧‧ hollow cavity

6‧‧‧Syringe

F‧‧‧down pressure

A‧‧‧Air

L‧‧‧Liquid

θ‧‧‧Folding angle

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

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

Figure 3 is a cross-sectional view showing the needle-free injection positive pressure fitting device in accordance with an embodiment of the present invention.

Figure 4 is a schematic view showing the needle-free injection positive pressure joint device according to the embodiment of the present invention in actual use.

Figure 5 is a schematic illustration of a needle-free injection positive pressure fitting device in accordance with an embodiment of the present invention when attached to a syringe.

Fig. 6 is a view showing the state of the needle-free injection positive pressure joint device according to the embodiment of the present invention after the syringe is removed.

Referring also to FIGS. 1 through 3, a needle-free injection positive pressure joint 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 11 and a joint 12. The cover 11 and the joint 12 are sleeved with each other, and the cover 11 has an injection inlet 111. The joint 12 has a liquid through hole 121 and communicates with the liquid. A liquid passage 122 of the through hole 121 and a gas passage 123 connected to the outside of the housing 1.

The elastic sealing member 2 is disposed in the casing 1. The outer surface of the elastic sealing member 2 and the inner surface of the casing 1 have a liquid flow space S1 communicating with the liquid through hole 121, and the elastic sealing member 2 has a pressure. The head 21, a pressure receiving seat 22, and a connecting member 23 connected between the pressure receiving head 21 and the pressure receiving seat 22. The top of the pressure receiving head 21 faces and closes the injection liquid outer inlet 111, and a side of the pressure receiving head 21 is formed with a notch portion 211 to form a notch space S3. The pressure receiving seat 22 has a recess 221 to form a compression space S2. The recess 221 covers the gas inlet 1231 of the gas passage 123, and the compression space S2 communicates with the outside of the casing 1 through the gas passage 123. The gas passage 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 the blood inserted into a living body 3 by being connected to a tube body 5. An indwelling needle 4 in a tube, such as a hand vein. In the present embodiment, the liquid passage 122 has an outwardly projecting extension pipe section 1221 for facilitating connection with the tubular body 5 to be connected.

When injecting, as shown in Figure 5, the user will have a syringe 6 The nozzle is aligned with the injection outer inlet 111 to apply a pressure F to the top of the pressure head 21, and an injection operation is performed. At this time, the injection external inlet 111 is pressed against the indenter 21 by the downward pressure F to change the closed state. Since the elastic sealing member 2 is deformed by the downward pressure F, the liquid flow space S1 and the notched space S3 which are not in communication with each other are communicated with each other. At this time, the compression space S2' (Fig. 5) is also transmitted from the pressure receiving head 21 to the pressure receiving seat 22 via the connecting member 23 by the downward pressure F, and the pressure seat 22 is deformed to press the air A therein. The gas passage 123 is discharged to the outside of the casing 1, and the compression space S2' (Fig. 5) is made smaller than the compression space S2 (Fig. 3) when it is not pressurized. When the user performs the injection operation with the syringe 6, the liquid in the syringe 6 is L from the injection outer inlet 111 through the notch space S3 into the liquid flow space S1.

When the syringe 6 is removed after the injection is completed, as shown in Fig. 6, the The pressure F is released under the pressure, and the elastic sealing member 2 rebounds so that the air A outside the casing 1 enters the compression space S2 via the gas passage 123, and the pressure seat 22 is expanded and restored. At the same time, the injection inlet outer inlet 111 is reclosed by the top of the pressure head 21, and the notch space S3 and the liquid flow space S1 are returned to the isolated state. Therefore, as is apparent from the above structural change, since the pressure receiving seat 22 is expanded and returned to the original state, and the notched space S3 and the liquid flow space S1 are returned to the isolated state, the notched space S3 injected into the casing 1 during the original injection state is compressed. The liquid L (Fig. 5) of the liquid flow space S1 causes a liquid volume difference, and the liquid volume difference caused at this time and the elastic sealing member 2 generate a positive pressure due to the resilience of the recovery shape, so that the liquid flow space S1 The liquid L is pushed into the liquid passage 122 via the liquid through hole 121 by being pushed by the positive pressure. Further, the tube 5 is further inserted into the indwelling needle 4 and injected into the living body 3 (Fig. 4). Since the liquid L is propelled by the positive pressure, the liquid L of the tube 5 can completely enter the living body 3 without remaining therein, and the blood of the living body 3 is not easily returned to the tube body 5 to form a thrombus therein. More preferably, the pressure seat 22 and the connecting member 23 are connected and are both hollow structures and are easily compressed. If the downward pressure F of the needle-free injection positive pressure joint device 100 is sufficiently large, the cavity S4 in the connecting member 23 is also Compressed with the compressed space S2, a larger positive pressure can be produced.

In the present embodiment, the outer diameter of the connecting member 23 is tapered in the direction from the pressure receiving head 21 toward the pressure receiving seat 22, and the outer diameter of the pressure receiving seat 22 is directed toward the pressure receiving seat 22 by the pressure receiving head 21. The divergence forms a notch angle θ greater than 90 degrees at the junction of the connecting member 23 and the pressure receiving seat 22, and the notch portion 211 is a notch formed by a recess at one side of the pressure receiving head 21, and is designed by the above. When the pressure F is applied at the time of injection, the elastic sealing member 2 is more likely to fall in the direction of the notch portion 211, thereby generating a gap to make the gap space S3 and the liquid flow space S1 in communication, and to make the injected liquid L smoother. Enter the liquid flow space S1.

In the present embodiment, the gas passage 123 is disposed around the liquid passage 122 so that the air A can be smoothly discharged and sucked. The joint seat 12 extends toward the compression space S2 at a position corresponding to the recess 221, and does separate the gas passage 123 and the liquid passage 122, thereby preventing the liquid L from flowing into the gas passage 123.

In this embodiment, the pressure receiving seat 22 is disposed on one of the latching slots 124 of the connector block 12. The bottom of the latching slot 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. At this point, the pressure receiving seat 22 is prevented from blocking the liquid through hole 121, and the liquid L is ensured to enter the liquid through hole 121 from the liquid flow space S1.

The above description is only for the description of the preferred embodiment of the present invention, and those skilled in the art can make other improvements according to the above description, but these modifications are The change remains within the creative spirit of this creation and the scope of patents defined below.

100‧‧‧With-needle injection positive pressure joint device

1‧‧‧shell

11‧‧‧ Cover

111‧‧‧Injection outside the entrance

12‧‧‧ connector seat

121‧‧‧Liquid through hole

122‧‧‧Liquid channel

1221‧‧‧Extended pipe section

123‧‧‧ gas passage

1231‧‧‧ gas inlet

124‧‧‧ card slot

2‧‧‧Elastic sealing member

21‧‧‧Indented head

211‧‧‧ nicks

22‧‧‧ Pressure seat

221‧‧‧ recess

23‧‧‧Connecting parts

S1‧‧‧Liquid flow space

S2‧‧‧Compressed space

S3‧‧‧ gap space

S4‧‧‧ hollow cavity

θ‧‧‧Folding angle

Claims (9)

A needle-free injection positive pressure joint device comprises: a casing comprising a cover body and a joint seat, the cover body and the joint seat are sleeved with each other, and the cover body has an injection external inlet, the joint seat a liquid passage having a liquid passage, a liquid passage communicating with the liquid passage, and a gas passage connected to the outside of the housing; and an elastic sealing member disposed in the housing, the outer portion of the elastic sealing member a liquid flow space communicating with the liquid through hole between the surface and the inner surface of the housing, the elastic sealing member having a pressure receiving head, a pressure receiving seat, and the pressure receiving head and the pressure receiving seat a connecting member, the top of the pressure head is opposite to and closes the outer inlet of the injection liquid, and a side of the pressure head is formed with a notch portion, the pressure seat has a concave portion to form a compression space, wherein The recess is covered by a gas inlet of the gas passage, and the compressed space is communicated to the outside of the casing by the gas passage, and the gas passage is isolated from the liquid flow space. The needle-free injection positive pressure joint device of claim 1, wherein the pressure seat is formed as a hollow hemispherical structure. The needle-free injection positive pressure joint device of claim 1, wherein an outer diameter of the connecting member is tapered from a direction of the pressure receiving head toward the pressure receiving seat, and an outer diameter of the pressure receiving seat is The direction of the pressure head toward the pressure receiving seat is diverging, so that a joint angle of more than 90 degrees is formed at the joint of the connecting member and the pressure receiving seat. The needle-free injection positive pressure joint device of 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 needle-free injection positive pressure joint device of claim 1, wherein the inner portion of the connecting member is formed with a hollow cavity communicating with the compression space. The needle-free injection positive pressure joint device of claim 1, wherein the gas passage is disposed around the liquid passage. The needle-free injection positive pressure joint device of claim 1, wherein the liquid passage has a An extended section that protrudes outward. The needle-free injection positive pressure joint device of claim 1, wherein the joint is extended toward the compression space at a position corresponding to the recess. The needle-free injection positive pressure joint device of claim 1, wherein the pressure seat is disposed in one of the joint seats, and the bottom of the snap groove is high in a direction of the pressure head toward the pressure seat. At the lower edge of the liquid through hole.