CN219147809U - Dilating catheter kit - Google Patents

Abstract

The application is applicable to the technical field of catheter apparatuses and provides an expanding catheter kit. The expansion catheter kit comprises a catheter body and a catheter joint, wherein a penetrating hole for the catheter body to penetrate is formed in the catheter joint, the catheter body is penetrated in the penetrating hole, the first end of the catheter body is used for penetrating into the penetrating hole from the first end of the penetrating hole, and the outer side wall of the catheter body is matched with the wall of the penetrating hole; the expansion catheter kit further comprises a first connecting part and a second connecting part, wherein the first connecting part is arranged on the wall of the penetrating hole, the second connecting part is arranged on the outer peripheral surface of the tube body, and the tube body and the tube joint are connected through the clamping of the first connecting part and the second connecting part. The first connecting portion and the second connecting portion that set up are convenient for make body and coupling realize being connected, adopt this kind of expansion pipe external member of this application to produce, and production efficiency can obtain very big improvement.

Description

Dilating catheter kit

Technical Field

The application belongs to the technical field of catheter apparatuses, and more particularly relates to an expanding catheter kit.

Background

The dilating catheter kit belongs to a medical auxiliary surgical instrument and is mainly applied to minimally invasive surgery. The expansion catheter kit comprises a catheter body and a catheter joint, wherein the catheter body is arranged in the catheter joint in a penetrating manner and is fixedly connected with the catheter joint.

The production process of the expansion catheter kit is to put the cut pipe body on the inner lining needle core of the mould, and then put the inner lining core of the mould of the pipe body into the cavity of the injection mould for injection molding, so that the pipe body and the pipe joint are connected and molded by injection molding. The production process has very low production efficiency, cannot be used for mass production and manufacturing, and increases the production cost of enterprises.

Disclosure of Invention

An aim of the embodiment of the application is to provide an expansion catheter kit, which aims at solving the technical problem of low production efficiency of the expansion catheter kit in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided an expansion catheter kit, the expansion catheter kit including a tube body and a tube joint, wherein a through hole through which the tube body is threaded is provided in the tube joint, the tube body is threaded in the through hole, a first end of the tube body is used for penetrating into the through hole from a first end of the through hole, and an outer side wall of the tube body is adapted to a wall of the through hole; the expansion catheter kit further comprises a first connecting part and a second connecting part, wherein the first connecting part is arranged on the wall of the penetrating hole, the second connecting part is arranged on the outer peripheral surface of the tube body, and the tube body and the tube joint are connected through the clamping of the first connecting part and the second connecting part.

Optionally, the first connecting portion includes two protruding blocks, the two protruding blocks are oppositely arranged with the axis of the through hole as the center, and can elastically deform along the direction approaching to or separating from the wall of the through hole; the second connecting part comprises two grooves which are arranged on the peripheral surface of the pipe body along the circumferential direction of the pipe body and are oppositely arranged by taking the axis of the pipe body as the center; the first connecting part is provided with a clamping position and an unlocking position, and the two convex blocks are respectively inserted into the two grooves under the condition that the first connecting part is positioned at the clamping position; under the condition that the first connecting part is at the unlocking position, the two convex blocks are respectively positioned outside the two grooves.

Optionally, the central angles of the two convex blocks are 180 degrees, and the two convex blocks are formed into an annular flange together; the central angles of the two grooves are 180 degrees, and the two grooves are formed into annular pits together.

Optionally, the plurality of annular flanges are arranged, and each annular flange is arranged on the wall of the through hole along the circumferential direction of the through hole and is arranged at intervals along the extending direction of the through hole; the annular pits are the same as the annular flanges in number and are arranged in one-to-one correspondence, are all arranged on the outer peripheral surface of the pipe body along the circumferential direction of the pipe body, and are arranged at intervals along the length direction of the pipe body.

Optionally, the expansion catheter kit further comprises a limiting assembly, the limiting assembly comprises a limiting block and a limiting spring, the outer side wall of the tube body is provided with a mounting groove for mounting the limiting spring, the first end of the limiting spring is fixedly connected with the bottom of the mounting groove, the limiting block is arranged on one side, far away from the bottom of the mounting groove, of the limiting spring, and the first end of the limiting block is fixedly connected with the second end of the limiting spring; the hole wall of the penetrating hole is provided with an accommodating groove for inserting the limiting block; the limiting block is provided with a limiting position and an avoiding position, the second end of the limiting block is positioned in the accommodating groove under the condition that the limiting block is positioned at the limiting position, and the second end of the limiting block is positioned in the mounting groove under the condition that the limiting block is positioned at the avoiding position; under the condition that the first connecting part is at the clamping position, the limiting block is at the limiting position.

Optionally, the surface that the stopper is close to the second end of wearing to establish the hole is from the stopper one end that is close to spacing spring to the stopper one end that keeps away from spacing spring to the direction slope setting that is close to the first end of wearing to establish the hole gradually.

Optionally, the limiting component is provided with two groups, and the two groups of limiting components are oppositely arranged by taking the axis of the pipe body as the center.

Optionally, the expansion catheter kit further comprises a resetting component, the resetting component comprises a resetting piece, a communicating groove communicated with the accommodating groove is formed in the outer side wall of the pipe joint, and the extending direction of the communicating groove is parallel to the extending direction of the accommodating groove; the first end of the resetting piece is arranged in the communication groove in a penetrating way, is in threaded connection with the groove wall of the communication groove, and is in threaded connection with the groove wall of the containing groove.

Optionally, the reset component further comprises a rubber gasket, and the rubber gasket is fixedly connected to the end face, close to the limiting block, of the reset piece.

Alternatively, the number of the annular flanges is two, and the number of the annular pits is correspondingly two; the outer peripheral surface of the pipe body is provided with external threads along the circumferential direction of the pipe body, and the external threads are arranged between the two annular pits; the hole wall of the penetrating hole is provided with internal threads which are matched with the external threads and are arranged along the circumferential direction of the penetrating hole, and the internal threads are arranged between the two annular flanges.

The beneficial effect of this application provided expansion pipe external member lies in: compared with the prior art, when manufacturing the expansion pipe external member of this application, firstly cut the body, then with the body with wear to establish the hole alignment, push away the first end of body and wear to establish downthehole from wearing to establish the first end in the hole, after the first end of body removes the second end of wearing to establishing the hole, first connecting portion will realize the block with the second connecting portion, body and coupling will realize being connected this moment. The first connecting portion and the second connecting portion that set up are convenient for make body and coupling realize being connected, adopt this kind of expansion pipe external member of this application to produce, and production efficiency can obtain very big improvement, has also reduced manufacturing cost to a certain extent simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of an expandable catheter kit provided in an embodiment of the present application after concealing a stop assembly and a reset assembly;

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

fig. 3 is a schematic structural diagram of a pipe body according to an embodiment of the present disclosure;

FIG. 4 is a simplified cross-sectional schematic view of an dilation catheter kit provided in an embodiment of the present application;

fig. 5 is an enlarged schematic view at B in fig. 4.

Reference numerals related to the above figures are as follows:

100. a tube body; 200. a pipe joint; 300. a first connection portion; 400. a second connecting portion; 500. a limit component; 510. a limiting block; 520. a limit spring; 600. a reset assembly; 610. a reset member; 620. rubber gaskets.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Embodiments and features of embodiments in this application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As described in the background art, the dilation catheter kit belongs to a medical auxiliary surgical instrument and is mainly applied to minimally invasive surgery. The expansion catheter kit comprises a catheter body and a catheter joint, wherein the catheter body is arranged in the catheter joint in a penetrating manner and is fixedly connected with the catheter joint. The production process of the expansion catheter kit is to put the cut pipe body on the inner lining needle core of the mould, and then put the inner lining core of the mould of the pipe body into the cavity of the injection mould for injection molding, so that the pipe body and the pipe joint are connected and molded by injection molding. The production process has very low production efficiency, cannot be used for mass production and manufacturing, and increases the production cost of enterprises.

Referring to fig. 1 and 2, in order to solve the above-mentioned problem, according to an aspect of the present application, an embodiment of the present application provides an expansion catheter kit, the expansion catheter kit includes a tube body 100 and a tube joint 200, a through hole through which the tube body 100 passes is provided in the tube joint 200, the tube body 100 passes through the through hole, a first end of the tube body 100 is used for passing through the through hole from a first end of the through hole, and an outer side wall of the tube body 100 is adapted to a wall of the through hole. The expansion catheter kit further comprises a first connecting part 300 and a second connecting part 400, wherein the first connecting part 300 is arranged on the wall of the penetrating hole, the second connecting part 400 is arranged on the outer peripheral surface of the catheter body 100, and the catheter body 100 and the catheter joint 200 are connected through the clamping of the first connecting part 300 and the second connecting part 400.

Referring to fig. 1 to 3, the pipe body 100 is generally cylindrical in shape, the cross section of the penetration hole is circular, the penetration hole is a blind hole, the pipe joint 200 is coaxially disposed with the penetration hole, and the pipe body 100 is coaxially disposed with the penetration hole. In specific applications, when the expansion catheter kit of the application is manufactured, the tube body 100 is firstly cut, then the tube body 100 is aligned with the penetrating hole, then the first end of the tube body 100 is pushed to penetrate into the penetrating hole from the first end of the penetrating hole, when the first end of the tube body 100 moves to the second end of the penetrating hole, the end face of the first end of the tube body 100 is attached to the bottom of the penetrating hole, the first connecting portion 300 is also clamped with the second connecting portion 400, and the tube body 100 and the tube joint 200 are connected. The first connecting portion 300 and the second connecting portion 400 are convenient for connecting the pipe body 100 with the pipe joint 200, and the expansion pipe sleeve member of the present application is adopted for production, so that the production efficiency can be greatly improved, and meanwhile, the production cost is reduced to a certain extent.

Referring to fig. 1 to 3, the first connecting portion 300 in the present embodiment includes two protruding blocks, which are disposed opposite to each other with respect to the axis of the through hole as the center, and are elastically deformable in a direction approaching or separating from the wall of the through hole; the second connection part 400 includes two grooves which are provided on the outer circumferential surface of the pipe body 100 in the circumferential direction of the pipe body 100 and are oppositely provided centering on the axis of the pipe body 100. The first connecting portion 300 has a locking position and an unlocking position, and when the first connecting portion 300 is at the locking position, the two protruding blocks are respectively inserted into the two grooves; with the first connecting portion 300 in the unlocked position, the two protrusions are located outside the two grooves, respectively.

In embodiments of the present application, both bumps are made of an elastomeric material, such as rubber, although in other embodiments, the bumps may be made of other elastomeric materials. In a specific application, when the pipe body 100 is connected to the pipe joint 200, the pipe body 100 is aligned with the through hole first, then the first end of the pipe body 100 is pushed to penetrate into the through hole from the first end of the through hole, in this process, the two protruding blocks are located outside the two grooves first, and the first connecting portion 300 is at the unlocking position; when the first end of the pipe body 100 moves to the second end of the through hole, the two grooves will also move to the positions aligned with the two protrusions, the two protrusions will be correspondingly inserted into the two grooves, and at this time, the first connecting portion 300 is at the clamping position, and the pipe body 100 and the pipe joint 200 will also be connected. In addition, when the pipe body 100 needs to be separated from the pipe joint 200, a pulling force is applied to the pipe body 100 toward the first end of the through hole, and after the pulling force reaches a preset value, the first connecting portion 300 is switched from the engaged position to the unlocked position, and then the pipe body 100 is continuously pulled to move toward the first end of the through hole until the pipe body 100 is completely separated from the pipe joint 200. The first connecting part 300 and the second connecting part 400 are convenient for not only realizing connection between the pipe body 100 and the pipe joint 200, improving the assembly efficiency of the pipe body 100 and the pipe joint 200, but also being convenient for enabling the pipe body 100 and the pipe joint 200 to be detachably connected, and improving the practicability of the expansion catheter kit.

Referring to fig. 1 and 3, the central angles of the two projections in the present embodiment are 180 °, and the two projections are formed together into an annular flange; the central angles of the two grooves are 180 degrees, and the two grooves are formed into annular pits together.

In the present embodiment, the annular flange is disposed coaxially with the through hole and the annular recess is disposed coaxially with the tubular body 100. With the first connection portion 300 in the engaged position, the annular flange is inserted into the annular recess while the outer surface of the annular flange is fitted to the inner side wall of the annular recess. The annular flange and the annular concave pit further strengthen the connection strength of the pipe body 100 and the pipe joint 200 after connection, and reduce the possibility of automatic detachment of the pipe body 100 and the pipe joint 200 after connection. In addition, the cross-section of the annular flange is semi-elliptical, which facilitates the insertion of the annular flange into the annular recess and the separation of the annular flange from the annular recess after a pulling force exceeding a predetermined value is applied to the pipe body 100.

Referring to fig. 1 and 3, as an alternative manner in the embodiment of the present application, a plurality of annular flanges are provided, each of which is provided on the wall of the through hole in the circumferential direction of the through hole, and the plurality of annular flanges are provided at intervals in the extending direction of the through hole. The number of the annular pits is the same as that of the annular flanges, the annular pits are arranged in one-to-one correspondence, each annular flange is arranged on the outer peripheral surface of the pipe body 100 along the circumferential direction of the pipe body 100, and a plurality of annular pits are arranged at intervals along the length direction of the pipe body 100.

In this alternative manner, two annular flanges are provided, two annular pits are correspondingly provided, one of the two annular flanges, which is provided near the first end of the through hole, is a first annular flange, the other is a second annular flange, and one of the two annular pits, which is provided near the second end of the pipe body 100, is a first annular pit, and the other is a second annular pit; of course, in other embodiments, the annular flange may be provided in three, four, or other numbers.

In particular applications, when the pipe body 100 is connected to the pipe joint 200, the pipe body 100 is first aligned with the through hole, then the first end of the pipe body 100 is pushed to pass through the through hole from the first end of the through hole, during this process, when the second annular recess is aligned with the first annular flange, the first annular flange is inserted into the second annular recess, and at the same time, a pushing force set towards the second end of the through hole is applied to the pipe body 100, and exceeds a preset value, so that the first annular flange and the second annular recess are separated, and when the pipe body 100 moves until the second annular recess is aligned with the second annular flange, the second annular flange is inserted into the second annular recess, at the same time, the first annular recess is also aligned with the first annular flange, and at the same time, the first annular flange is inserted into the first annular recess, and at the same time, the pipe body 100 is stopped from moving in the through hole. The provision of two annular flanges and two annular recesses further enhances the strength of the connection of the pipe body 100 to the pipe joint 200 after the connection is made.

In this alternative, an external thread is provided on the outer circumferential surface of the pipe body 100 along the circumferential direction of the pipe body 100, the external thread being provided between the two annular recesses; the hole wall of the penetrating hole is provided with internal threads which are matched with the external threads and are arranged along the circumferential direction of the penetrating hole, and the internal threads are arranged between the two annular flanges.

In particular applications, when the pipe body 100 is coupled to the pipe joint 200, after the second annular recess is aligned with the first annular flange, the first annular flange is inserted into the second annular recess, and then the pipe body 100 is rotated toward the second end of the through hole, so that the first annular flange is separated from the second annular recess, and when the pipe body 100 is rotated until the second annular recess is aligned with the second annular flange, the second annular flange is inserted into the second annular recess, and then the first annular recess is also aligned with the first annular flange, and then the first annular flange is inserted into the first annular recess, and then the pipe body 100 is stopped from rotating. The external threads and the internal threads are provided to further enhance the coupling strength of the pipe body 100 after coupling with the pipe joint 200.

Referring to fig. 4 and 5, as an alternative manner in the embodiment of the present application, the expanding catheter kit further includes a limiting component 500, the limiting component 500 includes a limiting block 510 and a limiting spring 520, an installation groove for installing the limiting spring 520 is provided on an outer sidewall of the tube body 100, a first end of the limiting spring 520 is fixedly connected with a groove bottom of the installation groove, the limiting block 510 is disposed at a side of the limiting spring 520 far away from the groove bottom of the installation groove, and a first end of the limiting block 510 is fixedly connected with a second end of the limiting spring 520; the hole wall of the penetrating hole is provided with a containing groove for the insertion of the limiting block 510. The limiting block 510 is provided with a limiting position and an avoiding position, the second end of the limiting block 510 is positioned in the accommodating groove under the condition that the limiting block 510 is positioned at the limiting position, and the second end of the limiting block 510 is positioned in the mounting groove under the condition that the limiting block 510 is positioned at the avoiding position; when the first connecting portion 300 is at the engagement position, the stopper 510 is at the stopper position.

In this alternative, the mounting groove is horizontally disposed on the tube body 100, and the limit spring 520 is horizontally disposed. In a specific application, when the pipe body 100 is connected with the pipe joint 200, the pipe body 100 is aligned with the through hole first, then the first end of the pipe body 100 is pushed to penetrate into the through hole from the first end of the through hole, in the process, the second end of the limiting block 510 is compressed in the mounting groove under the action of the limiting spring 520 and the wall of the through hole, and at the moment, the limiting block 510 is at the avoiding position; when the pipe body 100 is moved to align the annular recess with the annular flange, and the annular flange is inserted into the annular recess, the mounting groove will also be aligned with the receiving groove, and the second end of the stopper 510 will be inserted into the receiving groove under the action of the stopper spring 520, and the stopper 510 is at the stopper position. The limiting assembly 500 further enhances the connection strength of the pipe body 100 after the pipe joint 200 is connected.

Referring to fig. 5, in this alternative manner, the surface of the stopper 510 near the second end of the through hole is gradually inclined from the end of the stopper 510 near the stopper spring 520 to the end of the stopper 510 far from the stopper spring 520 toward the direction near the first end of the through hole.

In a specific application, when the first end of the pipe body 100 penetrates into the through hole from the first end of the through hole, the surface of the stopper 510 close to the second end of the through hole will contact with the end surface of the first end of the pipe body 100, and at the same time, the second end of the stopper 510 will move into the mounting groove under the action of the stopper spring 520 and the wall of the through hole; the design of the stopper 510 near the surface of the second end of the through hole facilitates the second end of the stopper 510 to move into the installation groove more smoothly, and improves the convenience of the connection operation of the pipe body 100 and the pipe joint 200.

Referring to fig. 4, in the present alternative, two sets of the limiting assemblies 500 are provided, and the two sets of the limiting assemblies 500 are disposed opposite to each other centering on the axis of the pipe body 100. The two sets of limiting assemblies 500 further strengthen the connection strength of the pipe body 100 after the pipe joint 200 is connected.

Referring to fig. 4 and 5, in the present alternative, the dilating catheter kit further includes a restoring member 600, the restoring member 600 includes a restoring member 610, and a communicating groove communicating with the receiving groove is provided on an outer sidewall of the coupling 200, and an extending direction of the communicating groove is parallel to an extending direction of the receiving groove; the first end of the reset element 610 is threaded in the communicating groove and is in threaded connection with the groove wall of the communicating groove, and is in threaded connection with the groove wall of the accommodating groove, so that the first end of the reset element 610 can drive the limiting block 510 to slide in the accommodating groove along the extending direction of the accommodating groove.

In this alternative mode, the reset member 610 is a threaded rod, an external thread is provided on the outer circumferential surface of the threaded rod along the circumferential direction of the threaded rod, internal threads matched with the external thread on the threaded rod are provided on the groove walls of the communication groove and the containing groove, and the second end of the reset member 610 is fixedly connected with a handle, and the communication groove is horizontally arranged. In a specific application, when the pipe body 100 needs to be separated from the pipe joint 200, the first end of the reset element 610 is driven to move towards the bottom of the installation groove, and after the first end of the reset element 610 abuts against the end face of the second end of the limiting block 510, the first end of the reset element 610 is driven to move towards the bottom of the installation groove until the second end of the limiting block 510 is driven into the installation groove, and then a pulling force which is set towards the first end of the through hole and exceeds a preset value is applied to the pipe body 100, so that the pipe body 100 is separated from the pipe joint 200. The reset member 610 is provided to facilitate switching the stop block 510 from the limit position to the retracted position.

Referring to fig. 5, in this alternative, the reset assembly 600 further includes a rubber gasket 620, and the rubber gasket 620 is fixedly connected to the end surface of the reset element 610 adjacent to the stopper 510. The rubber gasket 620 prevents the situation that the end face of the first end of the reset piece 610 directly generates rotary friction with the end face of the second end of the limiting block 510 in the process of rotating and moving the reset piece 610 towards the bottom of the mounting groove, and further reduces noise generated by rotary friction in the process of driving the limiting block 510 to move.

In summary, implementing the dilation catheter kit provided by this embodiment has at least the following beneficial technical effects: when the expansion catheter kit is manufactured, the tube body 100 is firstly cut, then the tube body 100 is aligned with the penetrating hole, then the first end of the tube body 100 is pushed to penetrate into the penetrating hole from the first end of the penetrating hole, after the first end of the tube body 100 moves to the second end of the penetrating hole, the first connecting part 300 is clamped with the second connecting part 400, and at the moment, the tube body 100 and the tube joint 200 are connected. The first connecting portion 300 and the second connecting portion 400 are convenient for connecting the pipe body 100 with the pipe joint 200, and the expansion pipe sleeve member of the present application is adopted for production, so that the production efficiency can be greatly improved, and meanwhile, the production cost is reduced to a certain extent.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. The expansion catheter kit is characterized by comprising a catheter body (100) and a catheter joint (200), wherein a penetrating hole for the catheter body (100) to penetrate is formed in the catheter joint (200), the catheter body (100) is penetrated in the penetrating hole, a first end of the catheter body (100) is used for penetrating into the penetrating hole from the first end of the penetrating hole, and the outer side wall of the catheter body (100) is matched with the wall of the penetrating hole;

the expansion catheter kit further comprises a first connecting portion (300) and a second connecting portion (400), wherein the first connecting portion (300) is arranged on the hole wall of the penetrating hole, the second connecting portion (400) is arranged on the outer peripheral surface of the catheter body (100), and the catheter body (100) and the catheter joint (200) are connected through the clamping of the first connecting portion (300) and the second connecting portion (400).

2. The dilation catheter kit according to claim 1, wherein the first connection portion (300) comprises two projections, the two projections being oppositely arranged about an axis of the through hole and each being elastically deformable in a direction towards or away from a wall of the through hole; the second connecting part (400) comprises two grooves, wherein the two grooves are arranged on the outer peripheral surface of the pipe body (100) along the circumferential direction of the pipe body (100) and are oppositely arranged by taking the axis of the pipe body (100) as the center;

the first connecting part (300) is provided with a clamping position and an unlocking position, and when the first connecting part (300) is positioned at the clamping position, the two convex blocks are respectively inserted into the two grooves; with the first connection (300) in the unlocked position, the two lugs are located outside the two grooves, respectively.

3. The dilation catheter kit of claim 2, wherein the central angles of both of the lugs are 180 ° and both of the lugs are co-formed into annular flanges; the central angles of the two grooves are 180 degrees, and the two grooves are formed into annular pits together.

4. The dilation catheter kit of claim 3, wherein the plurality of annular flanges are provided, each of the annular flanges being provided on a wall of the through hole in a circumferential direction of the through hole and being spaced apart in an extending direction of the through hole; the annular pits are the same as the annular flanges in number and are arranged in a one-to-one correspondence manner, are all arranged on the outer peripheral surface of the pipe body (100) along the circumferential direction of the pipe body (100), and are arranged at intervals along the length direction of the pipe body (100).

5. The dilation catheter kit according to any one of claims 2 to 4, further comprising a limiting assembly (500), the limiting assembly (500) comprising a limiting block (510) and a limiting spring (520), a mounting groove for mounting the limiting spring (520) being arranged on an outer side wall of the tube body (100), a first end of the limiting spring (520) being fixedly connected with a groove bottom of the mounting groove, the limiting block (510) being arranged on a side of the limiting spring (520) away from the groove bottom of the mounting groove, the first end of the limiting block (510) being fixedly connected with a second end of the limiting spring (520); an accommodating groove for inserting the limiting block (510) is formed in the hole wall of the penetrating hole;

the limiting block (510) is provided with a limiting position and an avoiding position, the second end of the limiting block (510) is positioned in the accommodating groove under the condition that the limiting block (510) is positioned at the limiting position, and the second end of the limiting block (510) is positioned in the mounting groove under the condition that the limiting block (510) is positioned at the avoiding position; when the first connection part (300) is at the engagement position, the stopper (510) is at the stopper position.

6. The dilation catheter kit of claim 5, wherein a surface of the stopper (510) proximate the second end of the bore is progressively sloped from an end of the stopper (510) proximate the stop spring (520) to an end of the stopper (510) distal from the stop spring (520) in a direction proximate the first end of the bore.

7. The dilation catheter kit according to claim 5, wherein the limit assemblies (500) are provided in two sets, the two sets of limit assemblies (500) being oppositely arranged centred on the axis of the tube body (100).

8. The dilation catheter kit according to claim 5, further comprising a reset assembly (600), the reset assembly (600) comprising a reset member (610), a communication groove being provided on an outer side wall of the tube joint (200) in communication with the receiving groove, an extension direction of the communication groove being parallel to an extension direction of the receiving groove; the first end of the reset piece (610) is arranged in the communication groove in a penetrating way, is in threaded connection with the groove wall of the communication groove, and is in threaded connection with the groove wall of the containing groove.

9. The dilation catheter kit of claim 8, wherein the reset assembly (600) further comprises a rubber spacer (620), the rubber spacer (620) being fixedly connected to an end face of the reset member (610) adjacent to the stop block (510).

10. The dilation catheter kit of claim 4, wherein the annular flanges are provided in two and the annular dimples are provided in two correspondence;

an external thread is arranged on the outer peripheral surface of the pipe body (100) along the circumferential direction of the pipe body (100), and the external thread is arranged between the two annular pits; the hole wall of the penetrating hole is provided with internal threads which are matched with the external threads and are arranged along the circumferential direction of the penetrating hole, and the internal threads are arranged between the two annular flanges.

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