CN107693881B

CN107693881B - Safety infusion joint

Info

Publication number: CN107693881B
Application number: CN201610640350.3A
Authority: CN
Inventors: 杨照钦
Original assignee: Sunder Biomedical Tech Co
Current assignee: Sunder Biomedical Tech Co
Priority date: 2016-08-08
Filing date: 2016-08-08
Publication date: 2020-03-24
Anticipated expiration: 2036-08-08
Also published as: CN107693881A

Abstract

The invention provides a safe infusion joint which is provided with a combined inner tube, a first elastic piece and a second elastic piece, wherein the first elastic piece seals an inlet of the combined inner tube, the first elastic piece can be pushed away to open the inlet of the inner tube when in use, and after the safe infusion joint is used, the second elastic piece drives the combined inner tube and the first elastic piece to reset, so that the safe infusion joint can reduce residual liquid and has a more stable structure.

Description

Safety infusion joint

Technical Field

The invention relates to a medical device, in particular to a safe infusion joint without using a sharp needle.

Background

Various infusion lines are commonly used in medical treatment to deliver various fluids to and from patients, such as infusion, medication, or blood draw. The infusion joint is used for being connected with various infusion pipelines and used as a valve when liquid is input or output. Particularly, as importance to safety of medical staff is increased, a safety infusion connector which does not require a sharp needle for use has been used in many medical institutions in recent years.

However, the conventional safety infusion connectors have considerable gaps in which body fluid or medicine may remain after the end of infusion, and such remaining fluid may be mixed with newly added fluid at the time of next re-infusion, which may cause a problem of infection with germs, and thus have been developed with a view to reducing the remaining safety infusion connectors.

Referring to taiwan patent No. I378806, a conventional safety infusion connector capable of reducing residue includes a housing, an elastic valve and a two-way guiding element. The shell is provided with two openings, the elastic valve is accommodated in the shell and seals the two openings, and an accommodating space is defined by the elastic valve to support the bidirectional conduction element. The bidirectional conduction element is internally provided with a transfusion channel. When in use, the elastic valve is pushed and extruded by the external joint to deform, so that the bidirectional conduction element props open the elastic valve, and meanwhile, the transfusion channel is communicated with the two openings. After use, the liquid only remains in the infusion channel and not between the housing and the elastic valve.

Although the conventional safety infusion connector improves the problem of liquid residue, the bidirectional conducting element is only supported and positioned by the elastic valve. The elastic valve is required to be extruded and deformed during each use, and the elastic valve is expected to be easily loosened after long-term use, so that the position of the bidirectional conduction element is unstable, and the leakage occurs.

From the above, there is still a need for improvement of the conventional safety infusion connector.

Disclosure of Invention

The invention mainly aims to provide a safe infusion joint which can reduce liquid residue and has a stable structure.

To achieve the above objective, the present invention provides a safety infusion connector, which comprises a first inner tube, a second inner tube, a housing, a first elastic member and a second elastic member. The first inner tube is provided with a first protruding part, a sleeving part and at least one first abutting part, the first protruding part and the first abutting part are respectively connected with the sleeving part, the free end of the first protruding part is provided with at least one first through hole, a first flow channel is arranged in the first protruding part, and the first through hole is communicated with the first flow channel; the second inner tube is provided with a second protruding part, a body part and at least one second butting part, the second protruding part and the second butting part are respectively connected with the body part, the free end of the second protruding part is provided with at least one second through hole, a second flow channel is arranged in the second protruding part and the body part, and the second through hole is communicated with the second flow channel; the sleeve part and the body part are mutually sleeved, the first butting parts and the second butting parts are staggered, the free ends of the first protruding parts and the second protruding parts respectively face to opposite directions, and the first flow channel is communicated with the second flow channel; the shell is provided with a peripheral wall, a first end wall and a second end wall which seal two ends of the peripheral wall, the first end wall and the second end wall jointly enclose a first accommodating space, the first end wall and the second end wall are respectively provided with an opening, a first annular wall and a second annular wall extend outwards from the edge of the opening, the first annular wall encloses a first channel, and the second annular wall encloses a second channel; the first elastic piece is provided with a head part and a body part, the head part extends out from one side of the body part to form a closed end, the other side of the body part extends out to form an open end, a second accommodating space is arranged in the body part, and the second accommodating space is communicated with the open end; the second elastic piece is provided with a first fixing part, a second fixing part and at least one connecting part for connecting the first fixing part and the second fixing part, the first fixing part is arranged on the shell, and the second fixing part is arranged on the second inner tube; the first protruding part faces the first annular wall, the first elastic piece is sleeved on the first protruding part, the first protruding part penetrates through the opening end and is contained in the second containing space, the body part of the first elastic piece abuts against the second abutting part, and the head part of the first elastic piece is located in the first annular wall and seals the first channel; the first abutting part abuts against the second end wall, the second through hole of the second protruding part is contained in the second channel, and the first channel and the second channel are communicated with each other.

The safety infusion joint according to a preferred embodiment of the present invention further comprises a sealing member, wherein the sealing member is attached to the second end wall and is abutted by the first abutting portion, the sealing member has a third through hole, and the second protrusion passes through the third through hole.

In the safety infusion joint disclosed in a preferred embodiment of the present invention, the sealing member has two parallel surfaces, one of the surfaces is attached to the inner wall surface of the second end wall, and the other surface is abutted by the first abutting portion.

In the safety infusion joint disclosed in a preferred embodiment of the present invention, the peripheral wall has at least one slit, the first fixing portion of the second elastic member is sleeved on the outer wall surface of the peripheral wall, and the connecting portion movably penetrates through the slit.

In the safety infusion joint according to the preferred embodiment of the present invention, the first inner tube has two first abutting portions disposed oppositely, and the second inner tube has two second abutting portions disposed oppositely.

In the safety infusion joint according to the preferred embodiment of the present invention, the free end of the first protrusion is tapered to have a first side surface, and the first through hole is formed in the first side surface.

In the safety infusion connector according to a preferred embodiment of the present invention, the free end of the second protrusion is tapered to have a second side surface, and the second through hole is formed on the second side surface.

In the safety infusion connector according to the preferred embodiment of the present invention, the body portion of the first elastic member is connected to the head portion of the first elastic member, and the junction between the first end wall and the first annular wall is further provided with a pressing portion, and the pressing portion presses against the neck portion.

In the safety infusion joint according to the preferred embodiment of the present invention, the body of the first elastic member further has a positioning groove, and the second abutting portion further has a flange engaged with the positioning groove.

In a preferred embodiment of the present invention, an elastic ring is disposed between the engaging portion of the first inner tube and the trunk portion of the second inner tube.

Therefore, the safe infusion joint disclosed by the invention can only remain liquid in the first flow passage and the second flow passage after being used, so that the residual liquid is effectively reduced. The first inner tube is abutted against the second end wall of the shell through the first abutting part and is not supported by other elements, so that the structure is stable after long-term use.

The details of the present invention will be described in the following detailed description. However, it will be understood by those skilled in the art that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention as set forth in the appended claims.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded perspective view of the present invention.

Fig. 3 is a side view of fig. 2.

Fig. 4 is another exploded perspective view of the present invention.

Fig. 5 is a partial side view of the present invention.

Fig. 6 is a cross-sectional view taken along section line 66 in fig. 1.

FIG. 7 is a schematic view of the use of FIG. 6, showing the safety infusion connector in flow communication.

[ notation ] to show

Safety infusion joint 10

First inner tube 20

Free end 221 of first projection 22

First through hole 223 first flow channel 225

First side 227

The first abutting portion 26 of the engaging portion 24

Second inner tube 30

Free end 321 of second projection 32

Second through hole 323 and second flow channel 325

Second side 327

Torso portion 34 and second abutment portion 36

Flange 361

Outer casing 40

Inner peripheral wall 412 of peripheral wall 41

First end wall 42 of peripheral wall 414

Second end wall 43 first accommodation space 44

First annular wall 45 first passage 451

Second annular wall 46 second passage 461

Slit 47 pressing part 48

First elastic member 50

Head 52 neck 54

Open end 561 of body 56

Positioning slot 562 for second accommodating space 58

Second elastic member 60 and first fixing portion 62

Second fixing portion 64 connecting portion 66

Seal 70 third aperture 72

Elastic ring 80

Detailed Description

Referring to fig. 1 to 4, the safety infusion connector 10 of the present invention includes a first inner tube 20, a second inner tube 30, a housing 40, a first elastic member 50, a second elastic member 60 and a sealing member 70.

Referring to fig. 4 and 5, the first inner tube 20 has a first protruding portion 22, a sleeve portion 24 and two first abutting portions 26, the sleeve portion 24 is generally in a hollow cylinder shape, one end of the sleeve portion 24 is connected to the first protruding portion 22, the other end of the sleeve portion 24 is connected to the two first abutting portions 26, the two first abutting portions 26 are located at two opposite positions of one end of the sleeve portion 24, the end of the first protruding portion 22 not connected to the sleeve portion 24 is a free end 221 thereof, the free end 221 of the first protruding portion 22 has two first through holes 223, the first protruding portion 22 has a first flow channel 225 therein, and the first through holes 223 are communicated with the first flow channel 225. In other possible embodiments, the number of the first abutting portion 26 and the first through hole 223 may be one.

The second inner tube 30 has a second protrusion 32, a body portion 34 and two second abutting portions 36, one end of the second protrusion 32 is connected to the body portion 34, the other end is a free end 321 of the second protrusion 32, the two second abutting portions 36 are located at two opposite positions and are respectively connected to the body portion 34, the free end 321 of the second protrusion 32 has two second through holes 323, the second protrusion 32 and the body portion 34 have a second flow channel 325 therein, and the second through holes 323 are communicated with the second flow channel 325. In other possible embodiments, the number of the second abutting portion 36 and the second through hole 323 may be one.

Next, a combination of the first inner tube 20 and the second inner tube 30 will be described. The engaging portion 24 of the first inner tube 20 and the body portion 34 of the second inner tube 30 are engaged with each other, the first abutting portions 26 and the second abutting portions 36 are staggered, and the free ends 221 and 321 of the first protrusions 22 and the second protrusions 32 face opposite directions, respectively. Referring to fig. 6, the first channel 225 is communicated with the second channel 325.

Referring to fig. 2 and 3, the housing 40 has a peripheral wall 41, and a first end wall 42 and a second end wall 43 enclosing two ends of the peripheral wall 41. In the preferred embodiment of the present invention, for the convenience of assembly, the peripheral wall 41 has an inner peripheral wall 412 and an outer peripheral wall 414 that can be engaged with each other, the inner peripheral wall 412 is connected to the first end wall 42, and the outer peripheral wall 414 is connected to the second end wall 43. Referring to fig. 6 and 7, the peripheral wall 41, the first end wall 42 and the second end wall 43 together define a first accommodating space 44, the first end wall 42 and the second end wall 43 each have an opening, and a first annular wall 45 and a second annular wall 46 extend outward from the opening edge, the first annular wall 45 defines a first passage 451, the second annular wall 46 defines a second passage 461, and inner diameters of the first passage 451 and the second passage 461 are smaller than an inner diameter of the peripheral wall 41. The peripheral wall 41 has two slits 47.

The first elastic member 50 has a head 52 and a body 56, the head 52 extends from one side of the body 56 to form a closed end, the other side of the body 56 extends to form an open end 561, the body 56 has a second accommodating space 58 therein, and the second accommodating space 58 is communicated with the open end 561.

The second elastic member 60 has a first fixing portion 62, a second fixing portion 64 and two connecting portions 66 connecting the first fixing portion 62 and the second fixing portion 64, the first fixing portion 62 is sleeved on the outer wall surface of the peripheral wall 41, the second fixing portion 64 is disposed on the outer wall surface of the second protrusion portion 32 of the second inner tube 30, and the connecting portions 66 are disposed through the slits 47 in a stretchable manner. In other possible embodiments, there may be only one connecting portion 66, the first fixing portion 62 may be disposed at other positions of the peripheral wall 41, the second fixing portion 64 may be disposed at other positions of the second inner tube 30, and the slits 47 may be omitted.

Referring to fig. 2, 6 and 7, the sealing member 70 is generally a sheet and has two parallel surfaces, one of which is attached to the inner wall surface of the second end wall 43, and the other of which is supported by the first supporting portion 26. The seal 70 has a third aperture 72.

Referring to fig. 6 and 7, when the safety infusion connector 10 is assembled, the first protruding portion 22 faces the first annular wall 45, the first elastic member 50 is sleeved on the first protruding portion 22, so that the first protruding portion 22 passes through the opening 561 and is accommodated in the second accommodating space 58, the body 56 of the first elastic member 50 abuts against the second abutting portion 36, and the head 52 of the first elastic member 50 is located in the first annular wall 45 and seals the first channel 451.

The first abutting portion 26 abuts against the sealing member 70 and the second end wall 43, the second protrusion 32 passes through the third through hole 72, the second through holes 323 are accommodated in the second channel 461, and the first channel 225 and the second channel 325 are communicated with the second channel 461. In the preferred embodiment, the free end 321 of the second protrusion 32 is tapered to have a second side surface 327, and the second through hole 323 is formed on the second side surface 327.

The state of use of the invention is explained next.

Referring to fig. 6 and 7, when a user wants to infuse fluid through the safety infusion connector 10, a syringe nozzle (not shown) is inserted into the first annular wall 45, the first elastic member 50 moves the second inner tube 30 toward the second annular wall 46, at this time, the first through holes 223 of the first inner tube 20 are not shielded by the first elastic member 50, and the syringe communicates with the first flow channel 225, the second flow channel 325 and the second flow channel 461, so that the user can infuse or withdraw fluid as desired. At the same time, the two connection portions 66 of the second elastic member 60 are elongated.

It should be noted that, during the infusion, only the second inner tube 30 is pushed, and the first abutting portion 26 of the first inner tube 20 abuts against the second end wall 43 without moving, so the structure is stable. In addition, the liquid only flows between the first channel 225, the second channel 325 and the second channel 461, and does not leak into the first accommodating space 44, thereby reducing the residual amount of liquid. The sealing member 70 seals the gap between the second protrusion 32 and the second end wall 43, so that the gap is not leaked, in other possible embodiments, the sealing member 70 is not limited to be sheet-shaped, but the sealing member 70 is attached to the second end wall 43 and is abutted by the first abutting portion 26, and the safety infusion connector 10 without the sealing member 70 can also achieve the object of the present invention, in this case, the second through hole 323 of the second protrusion 32 is directly received in the second channel 461, and the first channel 225 and the second channel 325 are communicated with the second channel 461.

When the user wants to finish the infusion, only the syringe nozzle needs to be taken out from the first annular wall 45, the second inner tube 30 will be pulled by the elongated connecting portions 66 to be returned to the first annular wall 45, and the first elastic member 50 is also driven by the second abutting portion 36 to return to the original position, i.e. the head 52 of the first elastic member 50 seals the first channel 451 again.

In order to increase the anti-leakage effect, the first elastic element 50 further has a neck 54 connecting the head 52 and the body 56, the outer diameter and the inner diameter of the neck 54 gradually expand from the head 52 to the body 56, the free end 221 of the first protrusion 22 is tapered and has a first side 227, the first through hole 223 is opened on the first side 227, and the junction of the first end wall 42 and the first annular wall 45 further has a pressing portion 48, the neck 54 and the first side 227 are correspondingly matched, so that the pressing portion 48 presses the neck 54 and the first side 227, thereby increasing the effect of sealing the first through holes 223. Furthermore, the free end 321 of the second protrusion 32 is tapered to have a second side surface 327, and the second through hole 323 is formed on the second side surface 327.

In order to make the structure more stable, an elastic ring 80 is further provided between the nesting portion 24 of the first inner tube 20 and the trunk portion 34 of the second inner tube 30, so that the first flow passage 225 and the second flow passage 325 can be tightly joined.

In order to ensure the linking between the first elastic element 50 and the second inner tube 30, the body 56 of the first elastic element 50 further has a positioning groove 562, and the free end of the second abutting portion 36 further has a flange 361, and the flange 361 is engaged with the positioning groove 562.

It should be noted that the detailed description provided above with reference to the drawings is only an embodiment provided for illustrating the technical contents and features of the present invention, and those skilled in the art of the present invention should be able to make various simple modifications, substitutions or component reductions without departing from the spirit of the present invention after understanding the technical contents and features of the present invention, and therefore, the present invention should fall within the claims disclosed below.

Claims

1. A safety infusion connector, comprising:

the first inner pipe is provided with a first protruding part, a sleeving part and at least one first abutting part, the first protruding part and the first abutting part are respectively connected with the sleeving part, the free end of the first protruding part is provided with at least one first through hole, a first flow channel is arranged in the first protruding part, and the first through hole is communicated with the first flow channel;

the second inner tube is provided with a second protruding part, a body part and at least one second butting part, the second protruding part and the second butting part are respectively connected with the body part, the free end of the second protruding part is provided with at least one second through hole, a second flow channel is arranged in the second protruding part and the body part, and the second through hole is communicated with the second flow channel;

the sleeve part and the body part are mutually sleeved, the first butting parts and the second butting parts are staggered, the free ends of the first protruding parts and the second protruding parts respectively face to two opposite directions, and the first flow channel is communicated with the second flow channel;

the shell is provided with a peripheral wall, a first end wall and a second end wall which seal two ends of the peripheral wall, the first end wall and the second end wall jointly enclose a first accommodating space, the first end wall and the second end wall are respectively provided with an opening, and a first annular wall and a second annular wall extend outwards from the edge of the opening, the first annular wall encloses a first channel, and the second annular wall encloses a second channel;

the first elastic piece is provided with a head part and a body part, the head part extends out from one side of the body part to form a closed end, the other side of the body part extends out to form an open end, a second accommodating space is arranged in the body part, and the second accommodating space is communicated with the open end; and

a second elastic piece, having a first fixing portion, a second fixing portion and at least one connecting portion connecting the first fixing portion and the second fixing portion, wherein the first fixing portion is disposed on the housing, and the second fixing portion is disposed on the second inner tube;

the first protruding part faces the first annular wall, the first elastic piece is sleeved on the first protruding part, the first protruding part penetrates through the opening end and is contained in the second containing space, the body part of the first elastic piece abuts against the second abutting part, and the head part of the first elastic piece is located in the first annular wall and seals the first channel;

the first abutting part abuts against the second end wall, the second through hole of the second protruding part is contained in the second channel, and the first channel and the second channel are communicated with each other.

2. The safety infusion connector of claim 1, further comprising a sealing member attached to the second end wall and abutted by the first abutting portion, the sealing member having a third through hole, the second protrusion passing through the third through hole.

3. The safety infusion connector of claim 2, wherein the sealing member has two parallel surfaces, one of which is attached to the inner wall surface of the second end wall, and the other of which is abutted by the first abutting portion.

4. The safety infusion joint according to claim 1, wherein the peripheral wall has at least one slit, the first fixing portion of the second elastic member is sleeved on the outer wall surface of the peripheral wall, and the connecting portion is inserted through the slit.

5. The safety infusion connector of claim 1, wherein the first inner tube has two first abutting portions arranged oppositely, and the second inner tube has two second abutting portions arranged oppositely.

6. The safety infusion connector of claim 1, wherein the free end of the first protrusion is tapered to have a first side surface, and the first through hole is formed in the first side surface.

7. The safety infusion connector of claim 1, wherein the free end of the second protrusion is tapered to have a second side surface, and the second through hole is formed in the second side surface.

8. The safety infusion connector of claim 1, wherein the body portion of the first elastic member is connected to the head portion and further comprises a neck portion, and the junction of the first end wall and the first annular wall is further provided with a pressing portion which presses against the neck portion.

9. The safety infusion connector of claim 1, wherein the body of the first resilient member further comprises a positioning groove, and the second abutting portion further comprises a flange engaged with the positioning groove.

10. The safety infusion connector of claim 1, wherein an elastic ring is disposed between the engaging portion of the first inner tube and the body portion of the second inner tube.