CN113926073A

CN113926073A - Conduit connecting assembly

Info

Publication number: CN113926073A
Application number: CN202111529190.2A
Authority: CN
Inventors: 吕怡然; 高洪亮; 周连海
Original assignee: Aike Medical Devices Beijing Co ltd
Current assignee: Aike Medical Devices Beijing Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-01-14

Abstract

The invention discloses a conduit connecting assembly, which comprises a conical buffer tube and a tube socket, wherein the conical buffer tube comprises an equal-diameter inner cavity and a bowl-shaped inner cavity, the bowl-shaped inner cavity comprises a first bowl-shaped part and a second bowl-shaped part which are connected smoothly, a bowl opening of the second bowl-shaped part comprises a convex edge, a conical part of the tube socket comprises an annular groove, the second bowl-shaped part of the conical buffer tube is tightly matched with the outer part of the conical part of the tube socket, and the convex edge of the second bowl-shaped part is in buckling connection with the annular groove of the conical part of the tube socket. The conduit coupling assembly of the present invention has the advantages of: the horn mouth at the end of the conical part facilitates the insertion of the pipe body, and the buffer pipe is not easy to fall off from the conical part.

Description

Conduit connecting assembly

Technical Field

The application relates to the field of medical equipment, in particular to a catheter connecting assembly.

Background

Intravascular devices such as catheters are often used in the medical field. Catheters are typically inserted into a patient's femoral artery, radial artery, carotid artery, or jugular vein and are passed through a patient's blood vessel to reach the heart, brain, or other target anatomy. Typically, a guidewire is first guided to the target anatomy, and one or more catheters are then passed over the guidewire and guided to the target anatomy. Once in place, the catheter may be used to deliver drugs, stents, embolic devices, radiopaque dyes, or other devices or substances for treating the patient in a desired manner. In other cases, the catheter and guidewire are delivered simultaneously toward the target anatomy while the guidewire is within the catheter, and then the guidewire is further delivered into the anatomy by translation within the catheter.

In many applications, the catheter needs to travel through a tortuous vessel to an anatomical site, which requires that the intravascular catheter have good pressure resistance, strong torque, pushability, strong resistance to bending, and timely responsiveness. One type of medical catheter of the prior art comprises a tubular body, a tapered buffer tube and a connecting part, wherein the tubular body is inscribed inside the taper of the connecting part and the tapered buffer tube is sleeved at the proximal end of the tubular body and outside the taper of the connecting part. The tapered buffer tube helps to avoid bending of the catheter at the junction of the tube body and the connecting member during use. The pipe body and the connecting part are fixed together in an adhesive mode. The conical buffer tube is fixed with the connecting part in an interference fit or bonding mode.

In the prior art, the connecting part of the pipe body and the pipe seat is easy to bend, so that the conduit is damaged. A tapered buffer tube is therefore required to connect the tube body and the tube socket to avoid buckling of the tube, but there are instances where the tube socket and the tapered buffer tube fit loosely during assembly, which makes the tube body and tube socket fit easily.

The present invention is directed to provide a pipe connecting assembly so as to prevent a connection portion between a pipe body and a socket from being bent.

Disclosure of Invention

The present invention is directed to a conduit connection assembly that solves the problems of the prior art. The object of the present invention is achieved by the following technical means.

One embodiment of the present invention provides a conduit connection assembly, wherein the conduit connection assembly comprises a tapered buffer tube and a tube socket, the tapered buffer tube comprises a constant diameter inner cavity and a bowl-shaped inner cavity, the bowl-shaped inner cavity comprises a first bowl-shaped part and a second bowl-shaped part which are smoothly connected, the bowl mouth of the second bowl-shaped part comprises a convex edge, the tapered part of the tube socket comprises an annular groove, the second bowl-shaped part of the tapered buffer tube is tightly matched outside the tapered part of the tube socket, and the convex edge of the second bowl-shaped part is in snap joint with the annular groove of the tapered part of the tube socket.

According to one embodiment of the present invention, there is provided a conduit connection assembly, wherein the tapered portion terminates in a flare.

According to the conduit connection assembly provided by the above one embodiment of the present invention, the depth a of the conical end bell ranges from 0.3mm to 2mm, and the angle B of the conical end bell ranges from: 90-160 degrees.

According to the above one embodiment of the present invention, there is provided a conduit connection assembly wherein the first bowl is constricted relative to the second bowl.

According to the conduit coupling assembly provided by the above embodiment of the invention, the width of the annular groove is in a range of 0.5-2 mm, and the depth of the annular groove is in a range of 0.2-1 mm.

According to the above one embodiment of the present invention, there is provided a conduit connection assembly, wherein the tapered end bell base diameter C ranges from: OD +0.8mm and C less than or equal to OD +2mm, and OD is the outer diameter of the conduit.

According to the catheter connecting assembly provided by the embodiment of the invention, the diameter D of the slender waist of the inner cavity of the tube seat at the matching part of the tube seat and the proximal end of the tube body ranges from: OD +0.02mm is not less than D is not less than OD +1mm, and the diameter D of the thin waist of the inner cavity of the tube seat at the matching part of the tube seat and the near end of the tube body is larger than the diameter C of the bottom of the horn mouth at the conical end head.

According to one embodiment of the present invention there is provided a catheter connection assembly wherein the length J of the constant diameter lumen of the tapered buffer tube is in the range: j is more than or equal to 80mm and more than or equal to 5 mm.

There is provided in accordance with the above one embodiment of the present invention a conduit connection assembly wherein the depth K of the first bowl is less than the depth F1 of the second bowl, the depth K of the first bowl being in the range: 0< K <5 mm.

According to one embodiment of the present invention, there is provided a catheter connection assembly wherein the inner diameter of the constant diameter lumen of the tapered buffer tube is N in the range of OD +0.1mm ≧ N ≧ OD-0.1mm, and the relationship between the outer diameter L of the constant diameter lumen of the tapered buffer tube and the inner diameter N of the constant diameter lumen of the tapered buffer tube is: L-N is more than or equal to 1 mm.

According to the conduit connection assembly provided by the embodiment of the invention, the inner diameter of the bowl opening of the second bowl part is G1, the outer diameter of the bowl opening of the second bowl part is M, and 4mm is larger than or equal to M-G1 is larger than or equal to 1 mm.

According to the above one embodiment of the present invention, there is provided a conduit connection assembly, wherein the relationship between the taper end bell outer diameter H and the inner diameter H1 at the first bowl mouth is: 8mm > H1 > H > 1.62 mm.

There is provided in accordance with the above one embodiment of the present invention a conduit connection assembly wherein the relationship between the inner diameter G1 at the bowl mouth of the second bowl and the outer diameter G of the cone adjacent the annular groove is: G-G1 is more than or equal to 0.2mm and less than or equal to 1.5mm, and G1 is more than or equal to 1.9mm and less than or equal to 3.2 mm.

There is provided in accordance with the above-described one embodiment of the present invention a conduit connection assembly wherein the relationship between the length F of the cone and the depth F1 of the second bowl is: F1-F is more than or equal to 2mm and more than or equal to 0.2, and F1 is more than or equal to 3.2mm and less than or equal to 12 mm.

According to the conduit connection assembly provided by the above one embodiment of the present invention, the plurality of protrusions are further provided on the outer surface of the tapered portion.

The conduit coupling assembly of the present invention has the advantages of: the horn mouth at the end of the conical part facilitates the insertion of the pipe body, and the buffer pipe is not easy to fall off from the conical part.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.

Figure 1 illustrates a conduit connection assembly according to one embodiment of the present invention.

FIG. 2 illustrates a cross-sectional view of a hub of a conduit connection assembly according to one embodiment of the present invention.

Figure 3 illustrates a buffer tube cross-section of a conduit connection assembly according to one embodiment of the present invention.

FIG. 4 illustrates a cross-sectional view of a tube socket of a conduit coupling assembly with a tapered end bell angle according to one embodiment of the present invention.

Figure 5 illustrates a perspective view of a conduit connection assembly according to another embodiment of the present invention.

Figure 6 illustrates a schematic view of a conduit connection assembly and conduit installation according to one embodiment of the present invention.

Reference numbers and part names: 1-tapered buffer tube, 2-tube holder, 3-catheter, 10-constant diameter lumen, 11-bowl lumen, 20-taper, 22-protrusion, 111-first bowl, 112-second bowl, 1120-ledge, E-ring groove, B-angle of taper end bell, C-diameter of taper end bell bottom, OD-catheter outer diameter, diameter of D-tube holder lumen waistline, H-diameter taper end bell outer diameter, outer diameter at G-ring groove, outer diameter of L-tapered buffer tube constant diameter lumen, inner diameter of N-tapered buffer tube constant diameter lumen, length of F-taper, F1-depth of second bowl, length of J-tapered buffer tube constant diameter lumen, k-depth of first bowl, H1-inner diameter of first bowl, G1-inner diameter of second bowl, M-outer diameter of second bowl, A-depth of taper end bell mouth.

Detailed Description

The following description of the embodiments of the present application with reference to the drawings and examples will make it apparent to those skilled in the art that the technical problems, technical solutions and technical effects of the present application can be easily solved through the contents described in the present specification. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. In addition, for convenience of description, only portions related to the related invention are shown in the drawings.

It should be noted that the structures, proportions, sizes, and other elements shown in the drawings are only used for understanding and reading the contents of the specification, and are not used for limiting the conditions under which the present application can be implemented, so they do not have the technical significance, and any structural modifications, changes in proportion, or adjustments of sizes, which do not affect the efficacy and achievement of the purposes of the present application, shall still fall within the scope of the technical content disclosed in the present application.

Reference herein to words such as "first," "second," "the," and the like do not denote a limitation of quantity, but rather denote the singular or plural. The present application is directed to the terms "comprising," "including," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

As shown in fig. 1-4, the catheter connection assembly comprises a tapered buffer tube 1 and a stem 2, the tapered buffer tube 1 comprises a constant diameter inner cavity 10 and a bowl-shaped inner cavity 11, the bowl-shaped inner cavity 11 comprises a first bowl-shaped part 111 and a second bowl-shaped part 112 which are smoothly connected, the bowl mouth of the second bowl-shaped part 112 comprises a convex edge 1120, the tapered part 20 of the stem 2 comprises an annular groove E, the second bowl-shaped part 112 of the tapered buffer tube 1 is tightly fitted outside the tapered part 20 of the stem 2 and the convex edge 1120 of the second bowl-shaped part 112 is snap-engaged with the annular groove E of the tapered part 20 of the stem 2. As shown in fig. 6, the conduit connection assembly is used to install the conduit 3.

The first bowl 111 of the conduit connection assembly according to one embodiment of the present invention is used for dispensing.

Figure 5 illustrates a perspective view of a conduit connection assembly according to another embodiment of the present invention. A conduit connection assembly according to another embodiment of the present invention as shown in fig. 5 differs from the conduit connection assembly according to one embodiment of the present invention of fig. 1-4 in that: the pipe coupling assembly is further provided with a plurality of protrusions 22 on the outer surface of the tapered portion 20 of the socket 2. The second bowl 112 is fitted over the plurality of projections 22 of the tapered portion 20 of the socket 2. Since the protrusion 22 increases the friction force contacting the second bowl 112, the second bowl 112 is not easy to fall off the cone 20, thereby reducing the risk that the pipe seat and the cone buffer pipe are loose during the assembly process, which leads to easy bending of the pipe body and the pipe seat.

As shown in fig. 2 and 4, the tip of the conical part is in a horn shape, and the depth A of the horn mouth of the tip of the conical part ranges from 0.3mm to 2 mm. The range of angle B of the cone end bell is: 90-160 degrees.

As shown in fig. 2, the taper end flare base diameter C ranges from: OD +0.8mm and C less than or equal to OD +2mm, and OD is the outer diameter of the conduit. The range of the diameter D of the thin waist of the tube seat inner cavity at the matching part of the tube seat and the near end of the tube body is as follows: OD +0.02mm is less than or equal to D and less than or equal to OD +1 mm. The diameter of the thin waist of the inner cavity of the tube seat is D larger than the diameter C of the bottom of the bell mouth at the end head of the conical part. The bell mouth at the end of the conical part is convenient for the insertion of the pipe body.

As shown in FIG. 2, the width of the annular groove E is 0.5-2 mm, and the depth is 0.2-1 mm. The external diameter of annular groove department is G > C +2mm, and toper end horn mouth external diameter is H, and G > H > C +1 mm.

As shown in FIG. 3, the length J of the constant diameter lumen of the tapered buffer tube ranges from: j is more than or equal to 80mm and more than or equal to 5 mm. The depth K of the first bowl 111 ranges from: 0< K <5 mm. The bowl mouth of the first bowl 111 is contracted relative to the bowl mouth of the second bowl 112, the depth K of the first bowl 111 is less than the depth F1 of the second bowl 112, and the length J of the constant diameter cavity of the conical buffer tube is greater than the depth F1 of the second bowl 112.

As shown in FIG. 3, the constant diameter inner cavity 10 of the tapered buffer tube 1 has an outer diameter L and an inner diameter N, wherein L-N is larger than or equal to 1 mm. The inner diameter of the bowl opening of the second bowl-shaped part 112 is G1, the outer diameter is M, and the diameter is more than or equal to 4mm and more than or equal to M-G1 and more than or equal to 1 mm. The inner diameter of the constant diameter inner cavity 10 of the conical buffer tube 1 is in the range of OD +0.1mm which is more than or equal to N and is more than or equal to OD-0.1 mm.

The relationship between the outer diameter H of the bell-end bell mouth of the cone-shaped part and the inner diameter H1 at the bowl mouth of the first bowl-shaped part 111 is as follows: 8mm > H1 > H > 1.62 mm.

The relationship between the inner diameter G1 at the bowl opening of the second bowl 112 and the outer diameter G of the cone adjacent the annular groove is: G-G1 is more than or equal to 0.2mm and less than or equal to 1.5mm, and G1 is more than or equal to 1.9mm and less than or equal to 3.2 mm.

The relationship between the length F of the taper and the depth F1 of the second bowl 112 is: F1-F is more than or equal to 2mm and more than or equal to 0.2, and F1 is more than or equal to 3.2mm and less than or equal to 12 mm.

While the present application has been described and illustrated with reference to particular embodiments thereof, such description and illustration are not intended to limit the present application. It will be clearly understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof within the embodiments without departing from the true spirit and scope of the present application as defined by the appended claims. The illustrations may not be drawn to scale. There may be a difference between the technical reproduction in the present application and the actual device due to variables in the manufacturing process and the like. There may be other embodiments of the application that are not specifically illustrated. The specification and drawings are to be regarded in an illustrative rather than a restrictive sense. Modifications may be made to adapt a particular situation, material, composition of matter, method, or process to the objective, spirit and scope of the present application. All such modifications are intended to be within the scope of the claims appended hereto. Although the methods disclosed herein have been described with reference to particular operations performed in a particular order, it should be understood that these operations may be combined, sub-divided, or reordered to form equivalent methods without departing from the teachings of the present application. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the present application.

Claims

1. The utility model provides a pipe coupling assembling, its characterized in that, pipe coupling assembling includes conical buffer tube and tube socket, and conical buffer tube includes constant diameter inner chamber and bowl form inner chamber, and the bowl form inner chamber includes smooth connection's first bowl form portion and second bowl form portion, and the bowl mouth of second bowl form portion includes the protruding edge, and the cone of tube socket includes the annular groove, and the second bowl form portion of conical buffer tube closely cooperates outside the cone of tube socket and the annular groove buckle joint of the protruding edge of second bowl form portion and the cone of tube socket.

2. The conduit coupling assembly of claim 1, wherein the tapered portion terminates in a flare.

3. The conduit coupling assembly of claim 2, wherein the depth a of the cone-end flare is in the range of 0.3mm to 2mm and the angle B of the cone-end flare is in the range of: 90-160 degrees.

4. The conduit coupling assembly of claim 1, wherein the first bowl is constricted relative to the second bowl.

5. The conduit coupling assembly of claim 1, wherein the annular groove has a width in the range of 0.5 mm to 2mm and a depth in the range of 0.2mm to 1 mm.

6. The conduit coupling assembly of claim 2, wherein the cone-end flare base diameter C ranges from: OD +0.8mm and C less than or equal to OD +2mm, and OD is the outer diameter of the conduit.

7. The catheter coupling assembly of claim 6 wherein the diameter D of the narrow waist of the hub interior at the proximal end engagement portion of the hub and body is in the range: OD +0.02mm is not less than D is not less than OD +1mm, and the diameter D of the thin waist of the inner cavity of the tube seat at the matching part of the tube seat and the near end of the tube body is larger than the diameter C of the bottom of the horn mouth at the conical end head.

8. The conduit coupling assembly of claim 7, wherein the length J of the constant diameter lumen of the tapered buffer tube ranges from: j is more than or equal to 80mm and more than or equal to 5 mm.

9. The conduit connection assembly of claim 8, wherein the depth K of the first bowl is less than the depth F1 of the second bowl, the depth K of the first bowl ranging from: 0< K <5 mm.

10. The catheter connection assembly of claim 9, wherein the inner diameter of the constant diameter lumen of the tapered buffer tube is N in the range OD +0.1mm ≧ N ≧ OD-0.1mm, and the relationship between the outer diameter L of the constant diameter lumen of the tapered buffer tube and the inner diameter N of the constant diameter lumen of the tapered buffer tube is: L-N is more than or equal to 1 mm.

11. The conduit coupling assembly of claim 10, wherein the second bowl has an inner diameter G1 at the bowl opening and an outer diameter M at the bowl opening, wherein M-G1 mm is 4mm ≧ M-G1 ≥ 1 mm.

12. The conduit connection assembly of claim 11, wherein the cone-end bell outer diameter H and the first bowl inner diameter H1 are in relation to one another: 8mm > H1 > H > 1.62 mm.

13. The conduit coupling assembly of claim 12, wherein the relationship between the inner diameter G1 at the bowl opening of the second bowl and the outer diameter G of the cone adjacent the annular groove is: G-G1 is more than or equal to 0.2mm and less than or equal to 1.5mm, and G1 is more than or equal to 1.9mm and less than or equal to 3.2 mm.

14. The conduit coupling assembly of claim 13, wherein the relationship between the length F of the cone and the depth F1 of the second bowl is: F1-F is more than or equal to 2mm and more than or equal to 0.2, and F1 is more than or equal to 3.2mm and less than or equal to 12 mm.

15. The conduit coupling assembly of claim 1, wherein the tapered portion further comprises a plurality of protrusions disposed on an outer surface of the tapered portion.