CN209751943U

CN209751943U - needleless medicine adding joint

Info

Publication number: CN209751943U
Application number: CN201821851312.3U
Authority: CN
Inventors: 冯嘉懿; 林益敏
Original assignee: Taizhou City Luqiao Eversafe Technology Co Ltd
Current assignee: Taizhou City Luqiao Eversafe Technology Co Ltd
Priority date: 2018-11-10
Filing date: 2018-11-10
Publication date: 2019-12-10
Anticipated expiration: 2028-11-10

Abstract

The utility model relates to a needleless dosing connector, which comprises a connecting pipe, a pressing sleeve and a rubber plug, wherein the pressing sleeve is fixed with the connecting pipe, the rubber plug is arranged in the pressing sleeve and the connecting pipe in a penetrating way, the outer wall of the pressing sleeve is provided with threads, the pressing sleeve is internally provided with a sealing hole and a guide hole which are axially penetrated and are in a ladder shape, the sealing hole is arranged at one end of the pressing sleeve, which is far away from the connecting pipe, and the orifice of the sealing hole falls into the guide hole; the rubber plug sequentially comprises a head part, a neck part and a corrugated pipe for forcing the head part to be embedded into the sealing hole, an inner cavity of the corrugated pipe is communicated with an inner cavity of the connecting pipe, the projection of the axial outline of the head part is elliptical, the head part is provided with a cut in the short axis direction of which the length direction is elliptical along the penetration of the rubber plug, and the cut is communicated with the inner cavity of the corrugated pipe; the sealing hole is round, or the major axis is smaller than the major axis of the head, the minor axis is larger than the minor axis of the head, or the minor axis and the major axis of the head correspond to the ellipse; the problem that the medicine adding pressing sleeve needs to puncture an opening and is poor in sealing performance is solved, and the effects of needleless opening and closing and automatic sealing are achieved.

Description

Needleless medicine adding joint

Technical Field

The utility model relates to an injection accessory field especially relates to a needleless adds medicine and connects.

Background

In recent years, with the wide application of the venous indwelling needle, the pain of a patient caused by repeated venipuncture in long-term treatment is greatly reduced, and the nursing workload is also reduced. The venous indwelling needle mainly comprises a needle part and a pressing sleeve part, wherein the pressing sleeve part is used for being butted with other infusion ends such as a syringe or a luer pressing sleeve.

Chinese patent No. CN205924586U discloses a Y-shaped needleless dosing connector, which comprises an upper fixed end cap, a "Y" shaped lower line end and an elastic sealing plug cylinder. This device is different from the double-deck platform formula elasticity closing cap structure of tradition non-guide, and during the medicine, elasticity sealing plug cylinder is punctured by adding the medicine post on upper portion under the pressure of syringe, and the upper, middle and lower part of elasticity sealing plug cylinder is followed and is fed medicine post and retract, until exposing the medicine through-hole that adds the medicine post, and the medicine in the syringe can get into main line and branch pipeline via adding medicine through-hole, interior pipeline, and the process is smooth and easy, and the medicine does not have and spills the hourglass. After the medicine is added, the elastic sealing plug cylinder retracts along the medicine adding column until the medicine is completely wrapped and sealed.

The defects of the prior art are that although the penetration of an external needle is avoided, the internal needle, namely the dosing column, is required to be arranged for puncture, the elastic sealing plug column body is possibly punctured by the dosing column to generate fragments to enter liquid medicine, a certain gap is left after the elastic sealing plug column body is punctured by the dosing column, the gap becomes obvious particularly after the elastic sealing plug column is punctured for multiple times, the sealing effect is poor, and the condition of bacteria entering or blood backflow can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a needleless adds medicine and connects, it has solved and has added medicine and press the cover to need puncture opening, the not good problem of leakproofness, has reached needleless switching, self-sealing's effect.

the above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a needleless adds medicine and connects, is fixed with the takeover including takeover, pressure cover and plug, and the plug is worn to locate and is pressed the cover and take over in, characterized by: the outer wall of the pressing sleeve is provided with threads, a stepped sealing hole and a guide hole which penetrate through the pressing sleeve along the axial direction are formed in the pressing sleeve, the sealing hole is formed in one end, far away from the connecting pipe, of the pressing sleeve, and an orifice of the sealing hole falls into the guide hole; the rubber plug sequentially comprises a head part, a neck part and a corrugated pipe for forcing the head part to be embedded into the sealing hole, an inner cavity of the corrugated pipe is communicated with an inner cavity of the connecting pipe, the projection of the outline of the head part along the axial direction is elliptical, a cut of which the length direction is elliptical and the short axis direction is arranged on the head part along the penetration of the rubber plug, and the cut is communicated with the inner cavity of the corrugated pipe; the sealing hole is round, or elliptical with a major axis smaller than the major axis of the head and a minor axis larger than the minor axis of the head, or elliptical with a minor axis corresponding to the major axis of the head.

By adopting the technical scheme, under the condition of no external acting force of a system, the head is in a state of deforming and embedding the head into the sealing hole under the action of the corrugated pipe, the long axis of the ellipse of the head is shortened and the short axis of the ellipse of the head is lengthened in the embedding process; at the same time, the incision will stretch along the length and decrease in width to force the incision to close; when the infusion set is externally connected, the luer connector is connected with the thread on the outer part of the pressing sleeve, meanwhile, the end head in the luer connector pushes the rubber plug to be separated from the sealing hole, after the rubber plug is separated from the limit, the deformation of the head returns, the cut is reopened, and the channel is opened to communicate infusion; (ii) re-sealing after the luer fitting is removed; therefore, the problem that the traditional doser needs to puncture an opening is solved, and when the doser is not butted, the rubber plug can be clamped by circumferential acting force, so that the opening tightness under the non-working state is greatly improved.

The utility model discloses further set up to: the outer surface of the neck portion is a conical surface which gradually reduces towards the head portion, and the outer surface of the neck portion abuts against the switching position of the guide hole and the sealing hole.

Through adopting above-mentioned technical scheme, when the head forced outwards removal, the butt of neck and switching department can realize extrudeing in advance to just can realize certain sealed when luer connector is not complete separation, avoid the situation that blood adverse current appears in this time.

The utility model discloses further set up to: the neck is internally provided with a connecting hole for communicating the notch with the inner cavity of the corrugated pipe, and the connecting hole is of a conical structure with a large opening facing the head.

Through adopting above-mentioned technical scheme, be in the extrusion of neck for the switching and provide the compression direction for the head is changeed and is compressed the closure.

The utility model discloses further set up to: the head is provided with a spherical protrusion taking the notch as the center in a protruding manner towards the end face of the connecting hole.

Through adopting above-mentioned technical scheme, the spherical surface is protruding to increase notched inboard open-ended thickness for the opening in the outside is changeed and is produced deformation, and the opening in the outside also can produce in advance inboard to a certain extent and seal, in order to guarantee good sealed effect.

The utility model discloses further set up to: the incision is a waist-shaped through hole, and the length of the incision is 1/3-2/3 of the minor axis of the ellipse of the head.

By adopting the technical scheme, the incision is too long to be effectively sealed, the incision is too short to be separated from the incision, the smoothness degree is poor, and when the proportion is limited between 1/3 and 2/3, the good sealing effect and smoothness degree can be kept in a balanced manner.

The utility model discloses further set up to: the width of the notch is 0.08-0.12 mm.

By adopting the technical scheme, the incision is too wide and difficult to effectively seal, the incision is too narrow and is poor in smoothness after being separated from the incision, and when the width of the incision is 0.08-0.12mm, good sealing effect and smoothness can be kept in a balanced manner.

The utility model discloses further set up to: the width of the notch is 0.1mm, and the length of the notch is 1.8 mm; the minor axis of the head is 3.7mm and the major axis is 5 mm.

By adopting the technical scheme, the channel cannot be immediately changed into a smooth state after the head part is separated from the sealing groove, and the notch is completely opened only when the luer connector is completely connected, namely the rubber plug descends by about 6 mm; and good sealing timeliness is ensured.

The utility model discloses further set up to: the connecting pipe is internally provided with a partition part which divides the inner cavity of the connecting pipe into an installation cavity for accommodating the corrugated pipe and an external connection cavity, and the partition part is inwards provided with an embedded groove for embedding one end of the corrugated pipe along the axial direction; the inner diameter of the installation cavity is larger than the outer diameter of the corrugated pipe which is not subjected to external force, and the corrugated pipe always falls into the installation cavity.

Through adopting above-mentioned technical scheme, the restriction that the bellows can be more stable is in taking over, is difficult for producing the skew for the plug can all be comparatively accurate location at flexible in-process.

The utility model discloses further set up to: the side of the connecting pipe is obliquely provided with an oblique connecting pipeline, and the inner cavity of the oblique connecting pipeline is communicated with the connecting cavity.

By adopting the technical scheme, the Y-shaped joint is formed, and another passage can be introduced or exhaust can be performed.

The utility model discloses further set up to: the outer wall of the connecting pipe sequentially comprises a first cylindrical surface portion, an annular concave surface, a conical surface portion and a second cylindrical surface portion, wherein the outer diameter of the second cylindrical surface portion is larger than that of the first cylindrical surface portion, and the inner wall of the pressing sleeve is abutted to the annular concave surface and the conical surface portion.

Through adopting above-mentioned technical scheme, press the cover to accomplish the location with the annular concave surface and the conical surface portion butt of takeover, later accomplish fixedly with both through ultrasonic bonding.

To sum up, the utility model discloses following beneficial effect has:

in a natural state, the incision is sealed or opened in a self-adaptive manner of generating circumferential force application and forced deformation, so that the opening sealing performance in an out-of-operation state is greatly improved; when the medicine feeder is opened, the medicine feeder is pushed by the butt joint and automatically resets and circulates after being separated from the environment, so that the problem that the traditional medicine feeder needs to be punctured with an opening is solved.

Drawings

FIG. 1 is an overall block diagram of the needleless medication administration connector of example 1;

FIG. 2 is an internal block diagram of the needleless access medication administration fitting of example 1;

FIG. 3 is an enlarged view at A of FIG. 2 of embodiment 1;

FIG. 4 is a structural view of the rubber plug of example 1;

FIG. 5 is an internal block diagram of the needleless access medication administration fitting of example 2;

FIG. 6 is a schematic structural view of example 5.

In the figure, 1, connecting pipe; 2. pressing the sleeve; 3. a rubber plug; 4. obliquely connecting pipelines; 11. a connecting cavity; 12. a mounting cavity; 13. caulking grooves; 14. a partition portion; 15. a first cylindrical surface portion; 16. an annular concave surface; 17. a conical surface portion; 18. a second cylindrical section; 21. sealing the hole; 22. a guide hole; 31. a head portion; 32. a neck portion; 33. a bellows; 34. connecting holes; 35. cutting; 36. the spherical surface is convex.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: a needleless medicine adding joint, as shown in fig. 1 and fig. 2, comprising a connecting pipe 1, a pressing sleeve 2 and a rubber plug 3; the rubber plug 3 is arranged in the pressure sleeve 2 and the connecting pipe 1 in a penetrating way, and the pressure sleeve 2 is sleeved on the connecting pipe 1.

Referring to fig. 2, a partition 14 for dividing the inner cavity of the adapter tube 1 into a mounting cavity 12 and a connection cavity 11 is provided in the adapter tube 1, and the connection cavity 11 is used for external connection, such as connection of an injection needle. The bottom of the connecting pipe is provided with a threaded sleeve which is integrally formed with the connecting pipe, the part of the connecting cavity corresponding to the connecting pipe is arranged in the threaded sleeve, and the inner wall of the threaded sleeve is provided with threads. The partition 14 is provided with a caulking groove 13 recessed along the axial direction at one side of the mounting cavity 12. Referring to fig. 3, the outer wall of the adapter tube 1 sequentially includes a first cylindrical surface portion 15, an annular concave surface 16, a tapered surface portion 17, and a second cylindrical surface portion 18 having an outer diameter larger than that of the first cylindrical surface portion 15, and the inner wall of the pressure sleeve 2 abuts against the annular concave surface 16 and the tapered surface portion 17. The pressure sleeve 2 is sleeved on the connecting pipe 1 and then fixed with the connecting pipe 1 through ultrasonic welding.

Referring to fig. 2, the outer wall of the pressing sleeve 2 is provided with a thread for connection with a luer fitting. The pressure sleeve 2 is internally provided with a stepped sealing hole 21 and a guide hole 22 which penetrate along the axial direction, wherein the sealing hole 21 is circularly arranged at one end of the pressure sleeve 2 far away from the connecting pipe 1, and the orifice of the sealing hole 21 falls into the guide hole 22, namely, all sizes of the sealing hole 21 are smaller than those of the guide hole 22.

Referring to fig. 2 and 4, the rubber plug 3 comprises, in sequence, a head 31, a neck 32 and a bellows 33 forcing the head 31 to be inserted into the sealing hole 21; one end of the corrugated pipe 33 is embedded in the caulking groove 13, and the inner cavity of the corrugated pipe 33 is communicated with the connecting cavity 11 of the connecting pipe 1; the inner diameter of the installation cavity 12 is larger than the outer diameter of the corrugated pipe 33 which is not subjected to external force, and the corrugated pipe 33 always falls in the installation cavity 12.

the outer surface of the neck portion 32 is a tapered surface that gradually decreases toward the head portion 31, and the outer surface of the neck portion 32 abuts against a junction between the guide hole 22 and the seal hole 21. The neck portion 32 is provided with a connecting hole 34 communicating with the inner cavity of the bellows 33, and the connecting hole 34 has a tapered structure with a large opening facing the head portion 31.

The projection of the outline of the head 31 along the axial direction is an ellipse, the head 31 is provided with a cut 35 with the length direction being the ellipse and the minor axis direction along the rubber plug 3, and the cut 35 is communicated with the connecting hole 34. The incision 35 is a waist-shaped through hole, and the length of the incision 35 is 1/3-2/3 of the minor axis of the ellipse of the head 31, preferably 1/2. The width of the slit 35 is preferably 0.08 to 0.12mm, and when the short axis of the head 31 is 3.7mm and the long axis is 5mm, the width of the slit 35 is 0.1mm and the length is 1.8 mm. The head portion 31 is provided with a spherical projection 36 centered on the cutout 35 projecting toward the end face of the attachment hole 34.

The working mode is as follows:

under the condition of no external force, the head 31 is in a state of being deformed and embedded into the sealing hole 21 under the action of the bellows 33, the major axis of the ellipse of the head 31 is shortened and the minor axis of the ellipse is lengthened in the embedding process; at the same time, the slit 35 will stretch in length and decrease in width to force the slit 35 closed.

When the luer connector is externally connected, the luer connector is in threaded connection with the outside of the pressing sleeve 2, meanwhile, the end head inside the luer connector pushes the rubber plug 3 to be separated from the sealing hole 21, after the rubber plug is separated from the limit, the deformation of the head 31 is recovered, and when the luer connector is completely connected, namely the rubber plug 3 descends by about 6mm, the notch 35 is completely opened; at this time, the channel is communicated with the transfusion. In addition, the speed of infusion can be controlled by controlling the screwing condition of the luer connector.

Example 2: as shown in fig. 5, the difference from embodiment 1 is that a miter pipe 4 is obliquely provided on a side surface of the adapter 1, and an inner cavity of the miter pipe 4 communicates with the connection chamber 11.

Example 3: the difference from embodiment 1 is that the seal hole 21 is elliptical, and the major axis of the seal hole 21 is smaller than the major axis of the head 31 and the minor axis of the seal hole 21 is larger than the minor axis of the head 31.

Example 4: the difference from embodiment 1 is that the short axis of the seal hole 21 corresponds to the long axis of the head 31.

Example 5: as shown in fig. 6, it is different from embodiment 1 in that the bottom of the adapter tube is free of a threaded sleeve.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the present invention.

Claims

1. The utility model provides a needleless adds medicine and connects, includes takeover (1), pressure cover (2) and plug (3), presses cover (2) and takeover (1) fixed, and plug (3) wear to locate in pressing cover (2) and takeover (1), characterized by: threads are arranged on the outer wall of the pressing sleeve (2), a stepped sealing hole (21) and a guide hole (22) which penetrate through the pressing sleeve (2) along the axial direction are formed in the pressing sleeve (2), the sealing hole (21) is formed in one end, far away from the connecting pipe (1), of the pressing sleeve (2), and an orifice of the sealing hole (21) falls into the guide hole (22); the rubber plug (3) sequentially comprises a head part (31), a neck part (32) and a corrugated pipe (33) for forcing the head part (31) to be embedded into the sealing hole (21), and the inner cavity of the corrugated pipe (33) is communicated with the inner cavity of the connecting pipe (1); the projection of the outline of the head (31) along the axial direction is oval, a cut (35) with the length direction being oval and the short axis direction is arranged on the head (31) along the rubber plug (3) in a penetrating mode, and the cut (35) is communicated with the inner cavity of the corrugated pipe (33); the sealing hole (21) is circular, or elliptical with a major axis smaller than the major axis of the head (31) and a minor axis larger than the minor axis of the head (31), or elliptical with a minor axis corresponding to the major axis of the head (31).

2. The needleless access medication attachment of claim 1, wherein: the outer surface of the neck (32) is a conical surface which is gradually reduced towards the head (31), and the outer surface of the neck (32) is abutted to the switching position of the guide hole (22) and the sealing hole (21).

3. A needleless dosing adaptor as claimed in claim 1 or claim 2 wherein: a connecting hole (34) which is communicated with the cut (35) and the inner cavity of the corrugated pipe (33) is arranged in the neck part (32), and the connecting hole (34) is of a conical structure with a large opening facing the head part (31).

4. The needleless access medication attachment of claim 1, wherein: the head part (31) is provided with a spherical protrusion (36) which takes the notch (35) as the center in a protruding way towards the end surface of the connecting hole (34).

5. The needleless access medication attachment of claim 1, wherein: the incision (35) is a waist-shaped through hole, and the length of the incision (35) is 1/3-2/3 of the minor axis of the ellipse of the head (31).

6. The needleless access medication attachment of claim 5 wherein: the width of the cut (35) is 0.08-0.12 mm.

7. The needleless drug delivery connector of claim 6, wherein: the width of the notch (35) is 0.1mm, and the length of the notch is 1.8 mm; the head (31) has a minor axis of 3.7mm and a major axis of 5 mm.

8. The needleless access medication attachment of claim 1, wherein: the connecting pipe (1) is internally provided with a partition part (14) which divides the inner cavity of the connecting pipe (1) into an installation cavity (12) for accommodating the corrugated pipe (33) and an external connection cavity (11), and the partition part (14) is inwards provided with a caulking groove (13) for one end of the corrugated pipe (33) to be embedded and connected along the axial direction; the inner diameter of the installation cavity (12) is larger than the outer diameter of the corrugated pipe (33) which is not subjected to external force, and the corrugated pipe (33) always falls in the installation cavity (12).

9. The needleless access medication attachment of claim 1, wherein: the side surface of the connecting pipe (1) is obliquely provided with an oblique connecting pipeline (4), and the inner cavity of the oblique connecting pipeline (4) is communicated with the connecting cavity (11).

10. the needleless access medication attachment of claim 1, wherein: the outer wall of the connecting pipe (1) sequentially comprises a first cylindrical surface portion (15), an annular concave surface (16), a conical surface portion (17) and a second cylindrical surface portion (18) with the outer diameter larger than that of the first cylindrical surface portion (15), and the inner wall of the pressing sleeve (2) is abutted to the annular concave surface (16) and the conical surface portion (17).