CN212914163U - Pipe joint, hose assembly and medical hose - Google Patents

Abstract

The utility model provides a pipe joint, a hose assembly and a medical hose, wherein the pipe joint is used for being connected with an outer hose to form the hose assembly; the pipe joint is provided with an inner cavity which is axially communicated, the inner cavity comprises a first cavity section and a second cavity section which are coaxially arranged, and the near end of the first cavity section is communicated with the far end of the second cavity section; the edge of the proximal end face of the first cavity section is located on the outer side of the edge of the distal end face of the second cavity section, an annular cross section is formed between the edge of the proximal end face of the first cavity section and the edge of the distal end face of the second cavity section, and the annular cross section is used for abutting against one end of the outer hose. The annular section is used as a limiting structure, when the pipe joint is connected with the outer hose, the axial position deviation of the outer hose can be limited, the inner cavity of the outer hose can be prevented from being blocked by glue, and the inner cavity of the outer hose can be smoothly penetrated when the subsequent inner hose and the hose assembly are assembled.

Description

Pipe joint, hose assembly and medical hose

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to coupling, hose assembly and medical hose.

Background

The prior art is a medical hose comprising an outer hose, an inner hose and a pipe connection for connecting the outer hose and the inner hose. Specifically, a portion of the length of the outer hose is inserted into the distal lumen of the adapter and fixedly attached to form a hose assembly which is in turn adapted to mate with the inner hose. When the device is used, the outer hose enters the human body in advance to form a pre-support, then the inner hose extends into the inner cavity of the outer hose through the near-end inner cavity of the pipe joint, and then the outer hose is pushed out of the far end of the outer hose to enter the human body and suck human tissue liquid and the like. The connection between the outer hose and the pipe joint is generally realized by a light spot gluing method, wherein the light spot gluing is a method for connecting two plastic raw materials by using light curing glue and the glue is cured by ultraviolet light. However, similar products in the existing market are prone to the problems of dislocation of the outer hose, unstable connection, blockage of the orifice of the outer hose by glue and the like when the outer hose is connected with the pipe joint. The problem that the orifice of the outer hose is blocked can cause the phenomena of blockage and blockage when the subsequent inner hose extends into the inner cavity of the outer hose, and the inner hose cannot smoothly penetrate through the inner cavity of the outer hose.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a coupling, hose assembly and medical hose, when the point is glued, the distal end inner chamber of coupling can more accurately and firmly form with outer hose connection hose assembly, and hose warp including the near-end inner chamber of coupling stretches into during hose assembly's outer hose inner chamber, can run through outer hose comparatively smoothly.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a pipe joint for connecting with an outer hose to form a hose assembly, the pipe joint having an inner cavity axially penetrating therethrough, the inner cavity including a first cavity section and a second cavity section coaxially disposed, a proximal end of the first cavity section communicating with a distal end of the second cavity section; the edge of the proximal end face of the first cavity section is located on the outer side of the edge of the distal end face of the second cavity section, an annular cross section is formed between the edge of the proximal end face of the first cavity section and the edge of the distal end face of the second cavity section, and the annular cross section is used for abutting against one end of the outer hose.

Optionally, the first cavity section is frusto-conical and the cross-sectional area tapers in a distal to proximal direction of the tube connector.

Optionally, the second cavity section is frusto-conical and the cross-sectional area tapers in a proximal to distal direction of the tube connector.

Optionally, the first cavity section is in a shape of a circular truncated cone, and the minimum diameter of the first cavity section is consistent with the outer diameter of the outer hose.

Optionally, the second cavity section is in a shape of a circular truncated cone, and the minimum diameter of the second cavity section is consistent with the inner diameter of the outer hose.

Optionally, the inner cavity further comprises a chamfered section formed by a sidewall chamfer of the distal end of the tube joint; the chamfered section is in a truncated cone shape, the area of the cross section of the chamfered section is gradually reduced along the direction from the far end to the near end of the pipe joint, and the near end of the chamfered section is connected with the far end of the first cavity section.

According to a second aspect of the present invention there is provided a hose assembly comprising an outer hose and a pipe joint according to any one of the aspects provided by the first aspect of the present invention; the near end of the outer hose extends into the first cavity section along the direction from the far end to the near end of the pipe joint, the near end face of the outer hose is abutted against the annular section, and the outer ring surface of the extending part of the outer hose is bonded with the inner wall of the first cavity section.

Optionally, the extending portion of the outer hose is cylindrical, the first cavity section is cylindrical or truncated cone-shaped, the outer diameter of the extending portion of the outer hose is consistent with the outer diameter of the annular cross section, and the inner diameter of the extending portion of the outer hose is consistent with the inner diameter of the annular cross section.

According to the utility model discloses a third aspect provides a medical hose, medical hose includes the inner hose and according to the utility model discloses any technical scheme that the second aspect provided hose assembly, the distal end of inner hose is followed the direction warp of the near-end to the distal end of coupling the second cavity section stretches into the inner chamber of outer hose.

Optionally, the second cavity section is cylindrical or truncated cone-shaped, the inner hose is cylindrical, and the outer diameter of the inner hose is consistent with the inner diameter of the annular cross section.

The utility model provides an among pipe joint, hose assembly and the medical hose, hose assembly includes fixed connection's coupling and outer hose, the hose includes hose assembly and be used for stretching into the hose cavity's outside the hose assembly inner hose to have following at least partial advantage:

the edge of the proximal end face of the first cavity section of the pipe joint is positioned outside the edge of the distal end face of the second cavity section to form an annular cross section, the annular cross section takes the edge of the proximal end face of the first cavity section as the outer edge of the annular cross section, and takes the edge of the distal end face of the second cavity section as the inner edge of the annular cross section. In practical use, when the outer hose extends into the first cavity section, the proximal end face of the outer hose can abut against the annular cross section, so that the axial relative positions of the outer hose and the pipe joint are limited, the dislocation of the outer hose is prevented, and the lengths of the outer hoses of the same batch extending out of the pipe joint are ensured to be consistent. And when the outer hose with when first chamber section adopts sticky connection, because the near-end terminal surface of outer hose with annular section butt, glue is difficult for overflowing to the near-end accent of outer hose to can not form the jam and lead to follow-up inner hose can't run through smoothly the inner chamber of outer hose. In addition, when the inner hose penetrates into the inner cavity of the outer hose through the second cavity section, the annular section is arranged towards one side of the outer hose, and the inner hose cannot be bent or cannot smoothly pass through due to the blockage of the annular section.

Further, the first lumen segment is preferably configured as a truncated cone having a cross-sectional area that tapers in a distal to proximal direction of the tube connector. When the outer hose is connected with the pipe joint by adopting a photo-dispensing method, the first cavity section is a dispensing area, and compared with the existing cylindrical design, the truncated cone-shaped design is adopted, so that the dispensing amount of glue can be increased, the connection between the outer hose and the pipe joint is firmer, the outer hose is not separated from the pipe joint due to pulling in the operation process of a user, and the use safety of a product is improved.

Furthermore, the second cavity section is preferably in a truncated cone shape, the cross section area is gradually reduced along the direction from the near end to the far end of the pipe joint, a guiding effect can be achieved, the inner hose is directly guided into the inner cavity of the outer hose through the second cavity section, the operation difficulty is reduced, and the inner hose is prevented from being folded and blocked.

Drawings

Fig. 1 is a sectional view of a conventional pipe joint;

FIG. 2 is a cross-sectional view of an assembled hose assembly and inner hose of the prior art;

fig. 3 is a sectional view of a pipe joint according to an embodiment of the present invention;

fig. 4 is a schematic sectional view illustrating the assembly of the hose assembly and the inner hose according to an embodiment of the present invention.

Description of reference numerals:

1-an outer hose;

51-medical hose, 41-hose assembly, 21-pipe joint, 211-first cylindrical straight cavity, 212-second cylindrical straight cavity and 213-annular section;

52-medical hose, 42-hose assembly, 22-pipe joint, 220-dispensing segment, 221-chamfer segment, 222-first cavity segment, 223-annular section and 224-second cavity segment;

3-inner hose.

Detailed Description

In order to make the contents of the present invention more clearly understood, the present invention will be further described with reference to the drawings and the following embodiments. It is to be understood that the invention is not limited to the particular embodiments described below, and that general alternatives known to those skilled in the art are intended to be included within the scope of the invention. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

It should be understood that in the following description, references to "upper" and "lower" components may be made based on the accompanying drawings. Spatial terms such as "below …", "below …", "below", "above", and the like are intended to facilitate describing the positional relationship of one element to another element as illustrated in the figures, and may encompass a variety of different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented, such as rotated 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

It should also be understood that in the following description, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and "distal" generally refers to the end that is first introduced into a patient.

For convenience of description, in the present invention, based on the orientation of fig. 1-4, the "proximal end of the tube joint" refers to the bottom end of the tube joint in the drawings, and correspondingly, the "distal end of the tube joint" refers to the head end (i.e., top end) of the tube joint in the drawings; the remaining components are described in an orientation relative to the pipe joint, e.g. "proximal end" of the outer hose "refers to the end of the outer hose, i.e. the end close to the pipe joint, and correspondingly" distal end "of the outer hose refers to the end of the outer hose remote from the pipe joint.

As background art, the inventor finds that, in the existing medical hose, when the outer hose and the pipe joint are connected, the outer hose is easy to be misplaced, the connection is not stable, and the orifice of the outer hose is blocked by glue. Referring to fig. 1 and 2, there are shown a cross-sectional view of a conventional pipe joint 21 and an assembled cross-sectional view of a hose assembly 41 and an inner hose 3. In the conventional medical hose 51, the hose assembly 41 is formed by assembling the tube joint 21 and the outer hose 1, specifically, the proximal end of the outer hose 1 extends into the first cylindrical straight cavity 211 of the tube joint 21 along the distal end to proximal end direction of the tube joint 21, then the relative position of the outer hose 1 and the tube joint 21 is adjusted to make the proximal end surface of the outer hose 1 flush with the annular cross section 213 of the tube joint 21, and the outer annular surface of the outer hose 1 is bonded to the inner wall of the first cylindrical straight cavity 211 by using the dispensing method, so as to form the hose assembly 41. In practical use, the inner hose 3 and the hose assembly 41 can be assembled into the medical hose 51 for use, and specifically, the distal end of the inner hose 3 can pass through the inner lumen of the outer hose 1 via the second cylindrical straight lumen 212 of the pipe joint 21 in the direction from the proximal end to the distal end of the pipe joint 21 and extend into the human body to suck tissue fluid and the like. Wherein the inner cavity of the pipe joint 21 comprises a first cylindrical straight cavity 211 and a second cylindrical straight cavity 212. The first cylindrical straight cavity 211 and the second cylindrical straight cavity 212 are both cylindrical, the proximal end of the first cylindrical straight cavity 211 is communicated with the distal end of the second cylindrical straight cavity 212, and the edge of the proximal end face of the first cylindrical straight cavity 211 is positioned at the inner side of the edge of the distal end face of the second cylindrical straight cavity 212, and an annular section 213 is formed between the edge of the proximal end face of the first cylindrical straight cavity 211 and the edge of the distal end face of the second cylindrical straight cavity 212. Here, "inside" refers to a side relatively close to the center of the pipe joint 21.

The inventors have further discovered that the existing pipe joint 21 and similar products suffer from the following disadvantages due to structural and functional limitations:

firstly, when the connection is performed in a light dispensing manner, the dispensing region between the pipe joint 21 and the outer hose 1 is a first cylindrical straight cavity 211, and during the bonding process of the light curing adhesive, the glue easily overflows from the proximal end of the outer hose 1 and flows into the inner cavity of the outer hose 1, so that the glue blocks the inner cavity of the outer hose 1 after the light curing, and the subsequent inner hose 3 cannot extend into the inner cavity of the outer hose 1, as shown in fig. 2.

Secondly, the pipe joint 21 and the outer hose 1 have a distance requirement when being bonded, and the proximal end face of the outer hose 1 needs to be flush with the annular cross section 213, and if there is no dispensing limit structure, the outer hose 1 is easy to shift up and down in the axial position during the operation process, and particularly during manual dispensing operation, the fault tolerance rate is low, and the outer hose is easy to scrap.

Thirdly, the effective contact part of the outer hose 1 and the pipe joint 21 is only the first cylindrical straight cavity 211, the dispensing amount is less, and the pipe joint 21 and the outer hose 1 have the requirement of firmness when being connected, if the dispensing amount is not enough, then when the user operates, the outer hose 1 is easy to be separated from the pipe joint 21 in the pulling process, and risks are generated to the product use.

Fourthly, when the inner hose 3 extends into the inner cavity of the outer hose 1 through the second cylindrical straight cavity 212, the inner hose is easily blocked by the annular section 213, and the phenomena of blockage and blockage occur, so that the inner cavity of the outer hose 1 cannot be smoothly inserted.

In order to solve the technical problem, the utility model provides a pipe joint, a hose assembly and a medical hose; the hose assembly comprises an outer hose and the pipe joint; the medical hose includes an inner hose and the hose assembly. The pipe joint is provided with an inner cavity which is axially communicated, the inner cavity comprises a first cavity section and a second cavity section which are coaxially arranged, the proximal end of the first cavity section is communicated with the distal end of the second cavity section, the edge of the proximal end face of the first cavity section is positioned outside the edge of the distal end face of the second cavity section, so that an annular section is formed between the edge of the proximal end face of the first cavity section and the edge of the distal end face of the second cavity section, and the annular section is used for abutting against one end of an outer hose so as to limit the axial position of the outer hose. Here, "outside" refers to a side relatively far from the center of the pipe joint; the proximal end face of the first cavity section and the distal end face of the second cavity section are faces formed by the corresponding cavity sections, and the edge of the corresponding proximal end face and the edge of the corresponding distal end face are inner side edges of the cavity wall of the corresponding cavity section; the ring section refers to a ring shape with a broad sense, including but not limited to a circular ring shape and an elliptical ring shape, and also includes other special-shaped ring shapes, such as a special-shaped ring shape composed of a circular inner edge and a polygonal outer edge, and the inner edge and the outer edge of the ring shape can be positioned on the same plane or different planes; further, a "cross-section" is understood to mean the actual mesa formed, rather than an imaginary cross-section or profile.

During actual assembly, as long as the proximal end of the outer hose extends into the first cavity section along the direction from the distal end to the proximal end of the pipe joint, in the process, the proximal end face of the outer hose abuts against the annular cross section, namely, is flush with the annular cross section, so that the axial position deviation of the outer hose and the first cavity section in the connection process can be effectively limited. And then the outer ring surface of the part of the outer hose extending into the first cavity section is bonded with the inner wall glue of the first cavity section, so that the outer hose and the pipe joint can be fixed. Particularly, because the end face of the near end of the outer hose is abutted to the annular section, the glue can be prevented from overflowing from the near end of the outer hose and blocking the inner cavity of the outer hose during light spot gluing, and the problem that the subsequent inner hose cannot stretch into the inner hose is avoided. In addition, because the annular cross section faces one side of the first cavity section, namely one side facing the outer hose, when the subsequent inner hose extends into the inner cavity of the outer hose through the second cavity section, the phenomenon of blockage caused by the annular cross section cannot occur, and the annular cross section can smoothly penetrate through the inner cavity of the outer hose.

Further, the first cavity section is preferably in the shape of a truncated cone, and the area of the cross section is gradually reduced along the direction from the far end to the near end of the pipe joint, when the edge of the near end face of the first cavity section is positioned outside the edge of the far end face of the second cavity section, namely the area of the minimum cross section of the first cavity section is larger than the area of the cross section of the farthest end of the second cavity section. Preferably, the outer hose is a circular tube, in which case the first cavity section is preferably circular truncated cone-shaped, and the smallest diameter of the first cavity section, i.e. the outer diameter of said circular cross-section, corresponds to the outer diameter of the outer hose. Here, through designing first chamber section for the truncated cone-shaped, and with the protruding part cooperation that is cylindrical outer hose, the space between the two becomes big, helps increasing the point volume of gluing, and when the user operates, outer hose is difficult to break away from the coupling in the process of dragging, has improved the safety in utilization of product.

Further, the second cavity section is preferably frusto-conical in shape, and the cross-sectional area tapers in the proximal to distal direction of the tube connector, wherein the edge of the proximal end face of the first cavity section is located outside the edge of the distal end face of the second cavity section, i.e. the area of the smallest cross-section of the second cavity section is smaller than the area of the most proximal cross-section of the first cavity section. Preferably, the outer hose is a circular tube, in which case the second cavity is preferably a circular truncated cone, and the smallest diameter of the second cavity, i.e. the inner diameter of the annular cross-section, corresponds to the inner diameter of the outer hose. The head end of the inner hose directly enters the inner cavity of the outer hose under the guidance of the second cavity section, and the inner hose can be smoothly matched with the outer hose during operation without blockage or smooth passing. Herein, the outer diameter and the inner diameter of the annular cross section refer to the diameter of the inner circle and the diameter of the outer circle, respectively, when the annular cross section is a circular ring.

Referring to fig. 3 and 4, fig. 3 is a sectional view of the pipe joint 22 according to the preferred embodiment of the present invention, and fig. 4 is a sectional view illustrating the assembly of the hose assembly 42 and the inner hose 3 according to the preferred embodiment of the present invention. The pipe joint, hose assembly and medical hose according to the present invention will be described in detail with reference to the accompanying fig. 3-4 and preferred embodiments.

As shown in fig. 3, the present embodiment provides a tube connector 22 having an inner lumen extending axially therethrough, wherein the inner lumen of the tube connector 22 includes a first lumen segment 222 and a second lumen segment 224 coaxially disposed, and wherein a proximal end of the first lumen segment 222 communicates with a distal end of the second lumen segment 224. The edge of the proximal end face of the first cavity segment 222 is located outside the edge of the distal end face of the second cavity segment 224, and an annular cross-section 223 is formed between the edge of the proximal end face of the first cavity segment 222 and the edge of the distal end face of the second cavity segment 224.

As shown in fig. 4, the present embodiment also provides a hose assembly 42 including the coupling 22 and the outer hose 1. When the pipe joint 22 is assembled with the outer hose 1, the proximal end of the outer hose 1 extends into the first cavity section 222 along the direction from the distal end to the proximal end of the pipe joint 22 until the proximal end surface of the outer hose 1 abuts against the annular cross section 223, and then the outer annular surface of the extending portion of the outer hose 1 is bonded to the inner wall of the first cavity section 222 by using methods such as dispensing. The annular section 223 can be used as a limiting structure when the pipe joint 22 is assembled with the outer hose 1, so that the axial position deviation of the outer hose 1 is limited, and the phenomenon that glue overflows to the inner cavity of the outer hose 1 when the glue is adhered can be prevented, so that the glue is blocked after being cured, and the subsequent inner hose 3 cannot smoothly penetrate through the inner cavity of the outer hose 1.

With continued reference to fig. 4, the present embodiment also provides a medical hose 52, which includes a hose assembly 42 and an inner hose 3. In use, the distal end of the inner hose 3 extends through the lumen of the outer hose 1 via the second lumen segment 224 in a proximal to distal direction of the adapter 22 and functions, for example, to extend into the body to aspirate tissue fluids and the like. Since the annular cross section 223 faces the side of the first cavity section 222, i.e. the side facing the outer tube 1, when the proximal end of the inner tube 3 extends into the inner cavity of the outer tube 1 through the second cavity section 224, it is not obstructed by the annular cross section 223 and the blockage phenomenon will not occur. Preferably, the inner edge of the proximal end surface of the outer hose 1 does not exceed the inner edge of the annular section 223, i.e. the edge of the distal end surface of the second cavity segment 224, so that when the proximal end of the inner hose 3 extends into the inner cavity of the outer hose 1 through the second cavity segment 224, the proximal end surface of the outer hose 1 does not obstruct the proximal end surface of the outer hose 1 and the inner edge is not blocked.

The shape of the existing outer hose 1 is generally cylindrical, and correspondingly, the first chamber section 222 for connecting the outer hose 1 is also generally cylindrical. In this embodiment, first cavity segment 222 may be of a cylindrical or frusto-conical design, preferably frusto-conical, e.g., frustoconical, with the cross-sectional area tapering in the distal to proximal direction of coupler 22. In addition, the shape of the portion of the outer hose 1 extending into the first cavity section 222 is not limited, and may be cylindrical or truncated cone, and is preferably cylindrical. The first cavity section 222 adopts a truncated cone-shaped design, so that the gap between the inner wall of the first cavity section 222 and the outer ring surface of the outer hose 1 can be increased when glue is connected, the glue dispensing amount can be increased during bonding, the connection is firmer, the probability that the outer hose 1 is separated from the pipe joint 22 due to pulling in the operation process of a user is reduced, and the use safety of a product is improved. Herein, a truncated cone includes, but is not limited to, conical, tetragonal, or octagonal, etc. tapered structures.

The shape of the inner hose 3 is generally cylindrical, and correspondingly, the second cavity section 224 for mating with the inner hose 3 is also cylindrical. In this embodiment, the second cavity 224 may be of a cylindrical or frusto-conical design, preferably frusto-conical, such as a truncated cone, with a cross-sectional area that tapers in a direction from the proximal end to the distal end of the tube connector 22, and correspondingly, the present invention is not limited to the shape of the inner hose 3, and the inner hose 3 may be cylindrical or conical, etc. It is also preferred that the first cavity segment 222 be circular truncated cone or cylindrical and the second cavity segment 224 be circular truncated cone, wherein the diameter of the proximal end of the first cavity segment 222 is the outer diameter of the circular cross section, the minimum diameter of the second cavity segment 224 is the inner diameter of the circular cross section, and the minimum diameter of the second cavity segment 224 is smaller than the diameter of the proximal end of the first cavity segment 222. The frusto-conical design of the second cavity 224 provides a guide for the proximal end of the inner hose 3 to be guided directly into the lumen of the outer hose 1 along the inclined inner wall of the second cavity 224 when passing through the second cavity 224 into the lumen of the outer hose 1 of the hose assembly 42, eliminating the alignment step and improving operability.

The inner cavity of the pipe joint 22 includes, but is not limited to, a first cavity section 222 and a second cavity section 224, and may include the remaining cavity sections connected to the first cavity section 222 or the second cavity section 224. For example, the inner lumen of the tube fitting 22 may further comprise a chamfered section 221, the chamfered section 221 being formed by chamfering a sidewall of the distal end of the tube fitting 22, the chamfered section 221 being frustoconical, the cross-sectional area tapering in a distal to proximal direction of the tube fitting 22, and the proximal end of the chamfered section 221 being connected to the distal end of the first cavity section 222. Because the chamfered section 221 opens outward relative to the center of the pipe joint 22, the chamfered section 221 can be used as a flow guide channel to receive dispensing glue conveniently.

The pipe joint 22 has a dispensing section 220 for dispensing, wherein the dispensing section 220 includes a first cavity section 222. Further, when the chamfer section 221 exists, the dispensing section 220 further comprises the chamfer section 221. When the pipe joint 22 is bonded to the outer hose 1, the glue flows in from the chamfer section 221 and flows through the first cavity section 222 to the annular cross section 223, and after curing, the chamfer section 221 and the inner wall of the first cavity section 222 are bonded to the outer annular surface of the outer hose 1.

In this embodiment, the nipple 22 and the outer hose 1 that make up the hose assembly 42 can be selected to fit a variety of sizes. Preferably, the proximal end face of the assembled outer hose 1 abuts against the annular section 223, and the inner edge of the proximal end face of the outer hose 1 does not exceed the inner edge of the annular section 223, so that the subsequent inner hose 3 cannot be folded and blocked due to the obstruction of the proximal end face of the outer hose 1 when extending into the inner cavity of the outer hose 1 through the second cavity section 224, and cannot smoothly penetrate through the inner cavity of the outer hose 1. There are also various dimensional specifications of the inner hose 3 adapted to the hose assembly 42, and it is preferred that, for example, when the second cavity section 224 is cylindrical or frusto-conical and the inner hose 3 is cylindrical, the smallest diameter of the second cavity section 224, i.e. the inner diameter of the annular cross-section 223, is identical to the outer diameter of the inner hose 3 or slightly larger than the outer diameter of the inner hose 3.

More preferably, for example, when the first chamber section 222 is provided in a cylindrical or frusto-conical shape and the outer hose 1 is provided in a cylindrical shape, the smallest diameter of the first chamber section 222, i.e. the outer diameter of the annular cross-section 223, coincides with the outer diameter of the outer hose 1, and the smallest diameter of the second chamber section 224, i.e. the inner diameter of the annular cross-section 223, coincides with the inner diameter of the outer hose 1. Thus, for the annular section 223 with the inner circle and the outer circle located on the same plane, when there is a machining dimension error, the outer diameter of the outer hose 1 should at least be not greater than the outer diameter of the annular section 223, the inner diameter of the outer hose 1 should at least be not less than the inner diameter of the annular section 223, and the difference between the annular width of the annular section 223 and the wall thickness of the outer hose 1 should at least be not greater than the difference between the inner diameter of the outer hose 1 and the inner diameter of the annular section 223, so that at any position where the outer hose 1 abuts against the annular section 223, the inner edge of the proximal end face of the outer hose 1 does not exceed the inner edge of the annular section 223, and when an operator manually connects the outer hose 1 and the pipe joint 22, special alignment is not needed, and the.

In another embodiment, the present invention provides another tube fitting, where the tube fitting also includes a first lumen section and a second lumen section that are coaxially disposed, the difference from the tube fitting 22 described above is that the first lumen section is frusto-conical, and the area of the cross-section tapers in the distal to proximal direction of the tube fitting, but the edge of the proximal end face of the first lumen section is not limited to the outside of the edge of the proximal end face of the second lumen section. Therefore, because the first cavity section is in a truncated cone shape, compared with the existing pipe joint 21, the pipe joint has the advantages that the gap between the inner wall of the first cavity section and the outer hose 1 can be increased, so that the glue dispensing amount is increased, the connection is firmer, and the use safety of a product is improved. It should be understood that the fitting may have further variations similar to the fitting 22 described above and will not be described in detail herein.

To sum up, in the utility model provides a pair of among coupling, hose assembly and the medical hose, the coupling adopts annular section as limit structure, by outer hose with the coupling bonds the in-process that forms hose assembly, and the fixed position of outer hose is accurate, and the effective length that stretches out the coupling distal end is at control range, and outer hose inner chamber pipeline is unblocked, does not have the glue blocking phenomenon, and because annular section is towards outer hose one side, during the second cavity section that inner hose was managed the coupling and is stretched into outer hose inner chamber, the inner hose does not have the card pause, rolls over stifled phenomenon, can pass through outer hose inner chamber smoothly.

In addition, the first cavity section and/or the chamfer section of the pipe joint adopt a truncated cone design, so that the glue dispensing amount can be increased, the connection firmness between the outer hose and the pipe joint meets the requirement, and the use safety of a product is improved.

The above description is only for the description of some embodiments of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the present invention.

Claims (10)

1. A pipe joint is used for being connected with an outer hose to form a hose assembly, and is characterized in that the pipe joint is provided with an inner cavity which is axially communicated, the inner cavity comprises a first cavity section and a second cavity section which are coaxially arranged, and the near end of the first cavity section is communicated with the far end of the second cavity section; the edge of the proximal end face of the first cavity section is located on the outer side of the edge of the distal end face of the second cavity section, an annular cross section is formed between the edge of the proximal end face of the first cavity section and the edge of the distal end face of the second cavity section, and the annular cross section is used for abutting against one end of the outer hose.

2. The coupler according to claim 1, wherein the first cavity section is frusto-conical and has a cross-sectional area that tapers in a distal to proximal direction of the coupler.

3. The fitting of claim 1 wherein said second cavity section is frusto-conical and tapers in cross-sectional area in a proximal to distal direction of said fitting.

4. The coupler according to claim 2, wherein the first cavity section is frustoconical and the smallest diameter of the first cavity section corresponds to the outer diameter of the outer hose.

5. A pipe coupling according to claim 3, wherein said second cavity section is frusto-conical and has a minimum diameter corresponding to the internal diameter of said outer hose.

6. The fitting of any of claims 1-5, wherein the internal cavity further comprises a chamfered section formed by a sidewall chamfer of the distal end of the fitting; the chamfered section is in a truncated cone shape, the area of the cross section of the chamfered section is gradually reduced along the direction from the far end to the near end of the pipe joint, and the near end of the chamfered section is connected with the far end of the first cavity section.

7. A hose assembly comprising an outer hose and a coupling according to any one of claims 1 to 6; the near end of the outer hose extends into the first cavity section along the direction from the far end to the near end of the pipe joint, the near end face of the outer hose is abutted against the annular section, and the outer ring surface of the extending part of the outer hose is bonded with the inner wall of the first cavity section.

8. The hose assembly of claim 7, wherein the protruding portion of the outer hose is cylindrical, the first cavity section is cylindrical or frustoconical, the protruding portion of the outer hose has an outer diameter that corresponds to an outer diameter of the annular cross-section, and the protruding portion of the outer hose has an inner diameter that corresponds to an inner diameter of the annular cross-section.

9. A medical hose comprising an inner hose and a hose assembly as claimed in any of claims 7 to 8, the distal end of the inner hose extending through the second lumen into the lumen of the outer hose in a proximal to distal direction of the coupling.

10. A medical hose according to claim 9, wherein the second lumen section is cylindrical or frusto-conical, the inner hose being cylindrical, the outer diameter of the inner hose corresponding to the inner diameter of the annular cross-section.

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