TWI637760B - Improved needleless connector - Google Patents

Abstract

The invention is provided with a receiving body, an elastic sleeve and a connecting cylinder. The receiving body has a conveying long tube. The conveying long tube is disposed in the receiving body and protrudes on both sides of the receiving body and is provided with a perforation and a balance. a hole, the through hole and the balance through hole respectively penetrating on the outer wall of the top end and the middle section of the conveying long tube, elastically sleeved in the receiving body and having an extending slit, a first bending portion and a second bending portion, the stretching The slit is disposed on the top surface of the elastic sleeve and corresponds to the long tube. The first curved portion is formed on the outer annular surface of the elastic sleeve and is located below the two perforations, and the second curved portion is formed in the elastic sleeve at the first position. The connecting tube is disposed in the receiving body, and the connecting barrel is provided with a connecting hole, and the connecting hole is engaged with the elastic sleeve.

Description

Improved needleless connector

The invention relates to a needle-free connector, which is an improved needle-free connector for connecting a medical liquid medicine bag and for infusion blood drawing.

Intravenous injection is a kind of medical injection method, which directly injects drugs or nutrient solution into the veins of the human body. The intravenous injection can be divided into two categories according to the length of time. The short-time intravenous injection is directly injected into the syringe. The vein, while the long-term intravenous injection is an intravenous drip (generally called a drip), a needle is inserted into the vein, and a bag of medical fluid is attached to the other end of the needle.

Referring to FIG. 6 and FIG. 7, a needle-free connector is disposed between the injection needle (not shown) and the liquid chemical input device 50 of the drug solution bag, and the drug solution of the drug solution bag is passed through the needle-free connector. The needle-free connector is provided with a main body 40, a conveying tube 41 and an elastic sleeve 42. The conveying tube 41 is disposed in the main body 40 and is provided with two through holes 411 and a balanced through hole 412. The through hole 411 is formed transversely through the conveying pipe 41. The balancing through hole 412 is formed transversely in the conveying pipe 41 and below the two through holes 411. The elastic sleeve 42 is disposed in the main body 40 and covers the outside of the conveying pipe 41. The elastic sleeve 42 is provided with two protruding convex portions 421 and a stretching slit 422 formed on the top surface of the elastic sleeve 42. The two rectangular convex portions 421 are combined with the balanced through hole 412, and are actually used. The input pipe 51 of the liquid chemical input device 50 penetrates into the main body 40 and simultaneously presses against the top surface of the elastic sleeve 42 so that the elastic sleeve 42 is pressed downward and then displaced downward, so that the conveying pipe 41 passes through the extending slit. 422, the two through holes 411 are communicated with the conveying pipe 51, and the chemical liquid can flow from the two through holes 411 into the conveying pipe 41. And continue to flow to the end of the injection needle, the two rectangles The convex portion 421 is separated from the two rectangular convex portions 412 by the elastic sleeve 42 being pressed downward, and is respectively abutted between the conveying tube 41 and the main body 40, so that the elastic sleeve 42 is on the top surface and the two rectangular convex portions. A storage space 423 is formed between the 421 and the two balanced through holes 412 of the conveying pipe 41.

During the intravenous injection, part of the liquid medicine flows into the storage space 423 through the balance through hole 412. Since the needle-free connector used in the past is not provided with the storage space 423, when the injection syringe is inserted into the medicine supply port, When the air is pushed in, and then the liquid medicine is injected, it will be directly removed and removed. During the insertion and removal of the delivery tube 41, a negative pressure will be generated in both directions, and the blood or body fluid of the patient will follow the return of the delivery tube 41 to cause pain. Therefore, in the process of removing the liquid in the storage space 423 of the conventional needle-free connector, the stored liquid is transmitted through the balanced through hole as the elasticity of the elastic sleeve 42 is restored during the removal of the main body 40 from the delivery tube 51. The 412 is returned to the delivery tube 41 to avoid causing pain to the patient and the risk of returning blood to reduce the risk of cross-contamination of the drug solution with the patient's blood or body fluids.

However, the prior art needle-free connector has disadvantages. As shown in FIG. 7 and FIG. 6 , the inside of the elastic sleeve 42 is provided with a plurality of flanges, and when the liquid medicine enters the storage space 423, it will be full. Between the flanges and the top ends of the elastic sleeve 42, when the elastic sleeve 42 is returned to the original position, the top end of the elastic sleeve 42 will be away from the peripheral surface of the conveying tube 41, so that some of the liquid medicine remains in the conveying tube 41 near the extension. The top end of the slit 422 is not easy to be removed. When the existing needle-free connector is repeatedly used and a new liquid medicine is introduced, there is a risk of chemical contamination or bacterial infection. In addition, the existing needle-free connector tube 41 is near the bottom end. The diameter of the sleeve 42 is large. When the elastic sleeve 42 is displaced downward by an external force, it will be supported by the support tube 41 to expand and deform the extension slit. Therefore, when the main body 40 is removed, the elastic sleeve 42 cannot be accurately returned to The initial position is in close contact with the main body 40. Even if the elastic sleeve 42 can be accurately returned, the inner wall surface of the storage space 423 still has a chemical liquid and is difficult to clean, thereby causing the growth of bacteria.

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention improves the conventional needle-free connector to avoid contamination due to leakage of residual liquid of the inner wall.

In order to achieve the above object, the technical means adopted by the present invention is to provide an improved needle-free connector comprising: a receiving body which is a hollow structure and is provided with a conveying long tube, and the conveying long tube is formed in the receiving The inside of the main body has a closed end and an open end, and the closed end and the open end of the transport long tube respectively protrude outside the receiving body, and the transport long tube is provided with a perforation and a balanced through hole. The through hole is transversely formed on the outer wall surface of the conveying long pipe near the closed end, and the balanced through hole is transversely formed on the outer wall surface of the conveying long pipe at the middle portion; an elastic sleeve is disposed in the receiving body and sleeved and conveyed a closed end of the long tube, the elastic sleeve has an extension slit, a first curved portion and a second curved portion, the extension slit is disposed on the top surface of the elastic sleeve and corresponds to the closed end of the long tube, the first bending Forming on an outer annular surface of the elastic sleeve, the first curved portion is below the perforation of the transporting long tube, and the second curved portion is formed on the outer annular surface of the elastic sleeve below the first curved portion, Closely contacting the outer wall surface of the conveying long tube, when the first bending portion is elastically deformed and closely abuts the conveying long tube, the second bending portion located downward is displaced downward to correspond to the through hole, wherein The second bending portion is outwardly expanded to expand between the second bending portion and the conveying long tube to form a storage space that is closed and communicates with the balanced through hole, and a connecting barrel that is disposed in the receiving body and Surrounding the elastic sleeve, a connecting hole is formed at a top end of the connecting barrel, and the connecting hole is engaged with one end of the elastic sleeve provided with the slit.

The elastic sleeve of the present invention has a first curved portion and a second curved portion, and both ends of the curved portions are closely sealed against the conveying long tube of the accommodating body, so that the two curved portions are in a state of being disconnected from each other, when the present invention When the external liquid medicine tube is to be connected, the liquid medicine tube is pushed against the top surface of the elastic sleeve and is displaced downward. First, the closed end of the conveying long tube passes through the stretching slit, and then the first bending portion is pressed and generated. Elastically deforming, and finally shifting the second curved portion downward to balance the through hole while the second curved portion is outward When the expansion, the second bending portion and the conveying long tube form a closed storage space, and when the liquid medicine enters the conveying long tube through the two perforations, part of the liquid medicine enters the storage space from the two balanced through holes during the flow process, Since the second bending portion and the conveying long tube are in a sealed state, the liquid medicine is retained in the storage space, and when the liquid medicine tube is removed, the storage space is reduced and most of the stored liquid medicine is pushed into the conveying. In the long tube, a small amount of the liquid remains in the gap between the second curved portion and the long tube, but does not leak outside the long tube, so that the contamination of the long tube or other parts can be avoided. When cleaning, just connect a new liquid tube or syringe to inject salt water to clean the residual liquid or blood.

10‧‧‧Accommodating subject

11‧‧‧Transportation tube

111‧‧‧ channel

112‧‧‧Perforation

113‧‧‧Balanced through hole

114‧‧‧closed end

115‧‧‧Open end

12‧‧‧ Positioning Department

20‧‧‧Flexible sleeve

21‧‧‧ Stretching the gap

22‧‧‧First bend

221‧‧‧ Upper closed area

222‧‧‧closed area

23‧‧‧The second bend

231‧‧‧Under closed area

232‧‧‧ storage space

24‧‧‧ bottom ring block

30‧‧‧Connecting tube

31‧‧‧Connection hole

32‧‧‧ Groove

33‧‧‧上盖

331‧‧‧Exhaust trough

40‧‧‧ Subject

41‧‧‧Transport

411‧‧‧Perforation

412‧‧‧Balanced through hole

42‧‧‧Flexible sleeve

421‧‧‧Rectangular convex

422‧‧ ‧ stretch gap

423‧‧‧ storage space

50‧‧‧Drug input device

51‧‧‧Input tube

100‧‧‧ drug tube

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

Figure 2 is a perspective exploded view of the present invention.

Figure 3 is a cross-sectional side view of the present invention taken along line 3-3 of Figure 1;

Figure 4 is a cross-sectional side view showing the operation of the present invention in combination with a liquid chemical tube.

Figure 5 is a cross-sectional side elevational view of another operation of the present invention in combination with a medical fluid tube.

6 is a cross-sectional side elevational view of a prior art needle-free connector and medical fluid input device.

Figure 7 is a cross-sectional side view of a prior art needle-free connector in combination with a drug liquid input device.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the drawings and preferred embodiments of the invention.

Referring to FIGS. 1 to 3, the improved needle-free connector of the present invention comprises a receiving body 10, an elastic sleeve 20 and a connecting barrel 30.

The accommodating body 10 has a hollow structure and is provided with a long conveying pipe 11 and two positioning portions 12, and the conveying long pipe 11 is extended and formed at the inner center of the accommodating body 10, and is connected to the inner wall surface of the accommodating body 10, and the conveying length is long. The tube 11 has a closed end 114, an open end 115, a passage 111, two through holes 112 and two balanced through holes 113. The closed end 114 and the open end 115 of the transport long tube 11 respectively protrude from the top end of the receiving body 10. At the opening with the bottom end, the conveying long tube 11 is a one-stage tubular body, that is, the outer diameter of the closed end 114 of the 11 is smaller than the outer diameter of the eleven open end 115, and the passage 111 is formed in the conveying long tube 10. And communicating with the open end 115, the two through holes 112 are transversely formed on the outer wall surface of the conveying long tube 11 near the closed end 114, and the two balanced through holes 113 are transversely formed in the outer wall surface of the conveying long tube 11 at the middle portion. The upper portion is located below the two through holes 112, and the through hole 112 and the balanced through hole 113 communicate with the channel 111. The two positioning portions 12 are oppositely formed on the inner wall surface of the accommodating body 10.

As shown in FIG. 2 and FIG. 3 , the elastic sleeve 20 is disposed in the accommodating body 10 and sleeved on the outside of the conveying long tube 11 . The elastic sleeve 20 is a hollow sleeve and has a slit 21 . a first curved portion 22, a second curved portion 23 and a bottom ring block 24 formed on the top surface of the elastic sleeve 20 and corresponding to the closed end 114 of the transporting long tube 11, the first curved portion 22 being laterally The upper annular surface of the elastic sleeve 20 is disposed on the outer annular surface of the elastic sleeve 20, and an upper closed area 221 is disposed at an end of the first curved portion 22 toward the extending slit 21, and the upper closed area 221 is disposed. The close-fitting abutment is disposed on the outer wall of the conveying long tube 11 below the two perforations 122. The middle closing area 222 is disposed at the other end of the first bending portion 22 away from the extending slit 21, and the middle closed area 222 is closely adhered to the conveying length The outer wall surface of the tube 11 forms a closed space between the upper closed area 221 and the middle closed area 222 and the transport long tube 11. The second curved portion 23 is formed on the outer annular surface of the elastic sleeve 20 and connects the first curved portion 22 The middle closed area 222, the second curved portion 23 is provided with a lower closed area 231, and the lower closed area 231 is closely abutted The conveying long tube 11 is located on the outer wall surface below the two balanced through holes 131. The second bending portion 23 forms a sealing gap with the conveying long tube 11. The sealing gap of the second bending portion 23 communicates with the two balanced through holes 113. Wherein the outer diameter of the first curved portion 22 is greater than the first The outer diameter of the second bent portion 23 is formed around the outer annular surface of the elastic sleeve 20 and abuts against the inner wall surface of the bottom of the accommodating body 10.

The connecting barrel 30 is disposed in the accommodating body 10 and surrounds the elastic sleeve 20, and the bottom end of the connecting barrel 30 abuts the bottom ring block 24 of the elastic sleeve 20, and the connecting barrel 30 is provided with a connecting hole 31, The two recesses 32 and an upper cover 33 are formed on the top surface of the connecting cylinder 30 and are engaged with one end of the elastic sleeve 20 where the slit 21 is provided. The two recesses 32 are recessed and formed outside the connecting cylinder 30. The two recesses 32 are respectively engaged with the two positioning portions 12 of the receiving body 10, and the upper cover 33 is formed around the outer ring surface of the connecting cylinder 30 and located at the connecting hole 31 and the two recesses. Between the slots 32, the upper cover 33 is correspondingly disposed on the top surface of the accommodating body 10. At the bottom surface of the upper cover 33, two opposite venting grooves 331 are provided. The two venting grooves 311 are respectively connected to the two grooves 32. through.

Referring to FIG. 4 and FIG. 5, in the practical application, the external medical tube 100 is connected for intravenous injection. Further, an injection needle (not shown) is connected to the open end 115 of the long tube 11. And the puncture is in the vein of the patient. When connected, the liquid medicine tube 100 is pushed down against the elastic sleeve 20 to disengage from the closed state of the closed hole 31, and the closed end 114 of the conveying long tube 10 penetrates the extension. The slit 21 enters the liquid medicine tube 100, and continues to press down to elastically deform the first bending portion 22, so that the first bending portion 22 abuts the conveying long tube 11 and allows the second bending portion located below. 23 is downwardly displaced and corresponds to the two balanced through holes 113, wherein the second curved portion 23 is outwardly expanded, and the closed gap between the second curved portion 23 and the conveying long tube 11 is expanded to form a closed storage space 232. Then, the liquid medicine passes through the two through holes 112 and flows into the passage 111 of the conveying long pipe 11, and part of the liquid medicine enters the closed storage space 232 through the two balanced through holes 113 during the flow.

When the invention is to be disassembled after the injection is completed, the liquid medicine tube 100 is removed, and the compressed elastic sleeve 20 is returned to the original orientation, and the storage space 232 is reduced with the elastic recovery of the second bending portion 23, and the storage is promoted. The liquid medicine is returned from the two balanced through holes 113 to the delivery long tube 11, and the pain of the patient due to the negative pressure generated when the liquid medicine tube 100 is removed can be avoided, and the second bending after the elastic recovery The curved portion 23 is still in close contact with the outer wall surface of the conveying long tube 11, so that a small portion of the residual chemical liquid is still restricted to remain in the gap between the second curved portion 23 and the conveying long tube 11 without leaking to The outer tube 11 is transported or other positions, so that the residual liquid can be prevented from causing contamination at the top end or other parts of the long tube 11. When the residual liquid is to be cleaned, it can be injected through a clean liquid medicine tube or syringe 100. The saline solution cleans the residual chemical solution in the second bending portion 23, thereby avoiding contamination of the new chemical solution or bacterial infection when the repeated use is performed, and the variation of the outer diameter size of the upper half of the delivery long tube 11 is small. In the process of installing the liquid medicine tube 100, the deformation amount of the expansion slit 21 of the elastic sleeve 20 can be reduced, so that the elastic sleeve 20 can still accurately return to the top end of the connection barrel 30 and be in close contact with the connection hole 31. .

Referring to FIG. 4 and FIG. 5, during the installation process of the liquid medicine tube 100, the elastic sleeve 20 is pressed downward to deform the first bending portion 22 but the upper closed portion 221 and the middle closed portion. The 222 is still in close contact with the transporting long tube 11 to prevent the input chemical liquid from leaking from the elastic sleeve 20, and the lower closed area 231 is displaced below the two balanced through holes 113 and closely abuts the conveying long tube 11 In this way, the liquid tightness is confined in the storage space 232, and when the liquid medicine tube is removed 100, each of the closed areas 221, 222, 231 returns to the original position and can be excluded from the wall surface remaining on the conveying long tube 11. Liquid medicine.

In addition, when the elastic sleeve 20 is subjected to extrusion deformation, the air located in the elastic sleeve 20 and the accommodating body 10 is also pushed, and the excess air can be discharged through the two grooves 32 and the two venting grooves 331 after being pushed. When the elastic sleeve 20 is returned to the original position, the corresponding air volume can be supplemented by the two exhaust grooves 331 to maintain the gas balance in the accommodating body 10.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The technical essence of the invention is implemented above Any simple modifications, equivalent changes and modifications made by the examples are still within the scope of the technical solutions of the present invention.

Claims (5)

An improved needle-free connector comprising: a receiving body having a hollow structure and a conveying long tube formed inside the receiving body, the conveying long tube having a closed end and an open end And the closed end and the open end of the conveying long tube respectively protrude outside the receiving body, the conveying long tube is provided with a perforation and a balanced through hole, and the through hole is transversely formed on the outer wall surface of the conveying long tube near the closed end, The balance through hole is transversely formed on the outer wall surface of the middle portion of the conveying long tube; an elastic sleeve is disposed in the receiving body and sleeves the closed end of the conveying long tube, the elastic sleeve has a slit, a first a curved portion and a second curved portion, the extending slit is disposed on a top surface of the elastic sleeve and corresponding to the closed end of the long tube, the first curved portion is formed on the outer annular surface of the elastic sleeve, the first bending The portion is under the perforation of the conveying long tube, and the second bending portion is formed on the outer annular surface of the elastic sleeve below the first bending portion, and is closely sealed with the outer wall surface of the conveying long tube when the first bending Production Sexually deforming and closely abutting the transporting long tube, causing the second curved portion located downward to be displaced downward to correspond to the through hole, wherein the second curved portion is outwardly expanded to allow the second curved portion to be transported The expansion between the long tubes forms a storage space that is closed and communicates with the balanced through holes; and a connecting barrel that is disposed in the receiving body and surrounds the elastic sleeve, and a connecting hole is disposed at a top end of the connecting tube. The connecting hole is engaged with one end of the elastic sleeve provided with the slit. The improved needle-free connector of claim 1, wherein an outer diameter of the first curved portion is greater than an outer diameter of the second curved portion. The improved needle-free connector of claim 1 or 2, wherein the first curved portion is laterally disposed on an outer annular surface of the elastic sleeve and is provided with an upper closed area and a middle closed area, the upper closed area is provided The first curved portion faces an end of the extending slit, and the upper closed portion abuts against the outer wall of the conveying long tube below the two perforations, wherein the middle closed portion is disposed at the other end of the first curved portion away from the extending slit, and The middle closed area is closely abutted against the outer wall surface of the conveying long tube, and the upper closed area, the middle closed area and the conveying long tube form a a confined space, the second bending portion is connected to the middle closed portion of the first bending portion and is provided with a lower closing region that closely abuts the outer wall of the conveying long tube below the two balanced through holes and is long with the conveying The tube forms a closed gap, and the bottom ring is formed around the bottom outer ring surface of the elastic sleeve. The bottom ring block abuts against the inner wall surface of the accommodating body, and the bottom end of the connecting barrel abuts the bottom ring block of the elastic sleeve. The improved needle-free connector of claim 3, wherein the accommodating body is provided with two positioning portions, and the two positioning portions are oppositely formed on the inner wall surface of the accommodating body, and the connecting tube is provided with two grooves and an upper cover. The two recesses are recessed and formed on the outer ring surface of the connecting cylinder and the opening faces downward. The two recesses are respectively engaged with the two positioning portions of the receiving body, and the upper cover is formed around the outer ring surface of the connecting cylinder and located at the connecting Between the hole and the two grooves, the upper cover correspondingly covers the receiving body. The improved needle-free connector of claim 4, wherein the bottom surface of the upper cover is provided with two opposite exhaust grooves, and the two exhaust grooves are respectively connected to the two grooves.