CN219551780U - Medical sacculus test structure - Google Patents

Abstract

The utility model discloses a medical balloon testing structure which comprises a connector main body, a piston, a front end cover and a first elastic sealing piece. The side wall of the connector main body is provided with a driving medium inlet communicated with the connector main body; the piston is of a hollow structure and sleeved in the connector main body, the first end of the piston is in sliding connection with the inner wall of the connector main body, a driving cavity communicated with a driving medium inlet is formed by matching the first end of the piston and the connector main body, and the parts of the piston positioned at two sides of the driving cavity are sealed and in sliding connection with the connector main body; the front end cover is arranged at an opening of the connector main body and sleeved with the second end of the piston; the first elastic sealing piece is arranged in the front end cover, and a mounting hole for communicating the piston is formed in the first elastic sealing piece along the axial direction of the first elastic sealing piece. The utility model solves the problems that the existing manual connector body is easy to generate indentation to cause leakage, is easy to be in virtual connection with a hypotube to pop up or the automatic connector is easy to squeeze the hypotube to deform in the hypotube connection process.

Description

Medical sacculus test structure

Technical Field

The utility model relates to the technical field of balloon testing, in particular to a medical balloon testing structure.

Background

In the field of medical instrument production, in order to improve the qualification rate of medical balloons, semi-finished balloons with different specifications are required to be connected and positive and negative pressure leakage detection is required.

In the prior art, a manual connector is generally required for connecting the multi-section hypotube of the medical balloon so as to connect two sections of hypotube pipe fittings through the manual connector, and a plastic body of the manual connector is easy to be indented or easily to be in virtual connection and ejection with the hypotube, so that the medical balloon fails in positive and negative pressure test, the tightness of the manual connector is difficult to accurately detect by manpower, and the virtual connection of the medical balloon and testing equipment such as the manual connector is difficult to be avoided; the automatic connector on the market is easy to squeeze the hypotube in the process of being connected with the hypotube, so that the hypotube is easy to squeeze and deform, and the hypotube cannot be normally used.

Disclosure of Invention

In view of this, the present utility model provides a medical balloon testing structure, so as to at least solve the problems that the existing manual connector body is easy to generate an indentation to cause leakage, and is easy to be in loose connection with a hypotube to pop up or the automatic connector is easy to be extruded in the hypotube connection process to cause deformation of the hypotube.

The embodiment of the utility model provides the following technical scheme:

the embodiment of the utility model provides a medical balloon test structure, which is characterized by comprising the following components:

the connector comprises a connector body, wherein the connector body is of a hollow structure with two openings, and a driving medium inlet communicated with the inside of the connector body is formed in the side wall of the connector body;

the piston is of a hollow structure and is sleeved in the connector main body, the first end of the piston is in sliding connection with the inner wall of the connector main body, a driving cavity communicated with the driving medium inlet is formed by matching the first end of the piston with the connector main body, and the piston is positioned at two side parts of the driving cavity and is in sealing and sliding connection with the connector main body;

the front end cover is of a hollow structure with two openings, is arranged at one opening of the connector main body and is sleeved with the second end of the piston;

the first elastic sealing piece is arranged in the front end cover, a mounting hole communicated with the piston is formed in the first elastic sealing piece along the axial direction of the first elastic sealing piece, the inner diameter of the mounting hole is gradually increased from the first end of the mounting hole to the second end of the mounting hole, and the mounting hole is internally used for inserting hypotubes with different diameters;

under the condition that the driving medium is conveyed into the driving cavity through the driving medium inlet to increase the internal air pressure of the driving cavity, the driving medium can push the piston to press the first elastic sealing piece, and the first elastic sealing piece reduces the inner diameter of the mounting hole to tightly wrap the hypotube.

Further, the medical balloon test structure further comprises:

the second elastic sealing piece is arranged in an annular shape, sleeved in the front end cover and positioned on one side, away from the piston, of the first elastic sealing piece and used for assisting in fixing and cooperatively sealing the hypotube.

Further, the medical balloon test structure further comprises:

the front guide piece is arranged in an annular shape, sleeved in the front end cover and positioned on one side, far away from the first elastic sealing piece, of the second elastic sealing piece and used for guiding the hypotube to be inserted into the second elastic sealing piece.

Further, an outer diameter of the second end of the piston is smaller than an inner diameter of the connector body, so that the second end of the piston is matched with the connector body and the front end cover to form a mounting cavity;

further, the connector body includes:

the pressure relief hole, the pressure relief hole set up in the connector main part, and communicate the installation cavity is used for avoiding the inside pressure of installation cavity is too big.

Further, the medical balloon test structure further comprises:

the reset springs are arranged in the mounting cavity at intervals around the circumference of the piston, and two ends of the reset springs are respectively connected with the piston and the front end cover in a corresponding mode and are used for resetting the piston after the piston extrudes the first elastic sealing piece.

Further, the piston includes:

the two piston sealing pieces are sleeved at the first end of the piston and are positioned at the two sides of the driving cavity and the driving medium inlet, the piston sealing pieces are in sealing and sliding connection with the inner wall of the connector main body, and the two piston sealing pieces are used for sealing gaps between the first end of the piston and the inner wall of the connector main body so as to seal the two sides of the driving cavity.

Further, the piston includes:

the piston main body is of a hollow structure, and a piston sealing piece is sleeved on the first end of the piston main body;

the piston outer ring is sleeved on the first end of the piston main body and is positioned on one side of the driving medium inlet away from the first end of the piston main body, and the piston outer ring is sleeved with another piston sealing piece.

Further, the connector body includes:

the first piston hole is formed in the first end of the connector body and is used for installing the first end of the piston body;

the second piston hole is formed in the second end of the connector body, the inner diameter of the second piston hole is larger than that of the first piston hole, and the second piston hole is used for installing the piston outer ring and the front end cover.

Compared with the prior art, the medical balloon test structure has the advantages that the driving medium is input into the driving cavity through the driving medium inlet, so that the air pressure in the driving cavity is increased, the piston moves in the direction of the front end cover and extrudes the first elastic sealing element, the first elastic sealing element is compressed to reduce the inner diameter of the mounting hole so as to be in sealed connection with the hypotube, and the problems that the existing manual connector body is easy to generate indentation to cause leakage and is easy to be in loose connection with the hypotube to pop up or the automatic connector is easy to be extruded in the hypotube connection process to cause deformation of the hypotube are solved;

further, by gradually increasing the inner diameter of the mounting hole from the first end of the mounting hole to the second end of the mounting hole, insertion of hypotubes of different diameters within the mounting hole is facilitated.

Drawings

FIG. 1 is a cross-sectional view of a medical balloon test structure of the present utility model;

FIG. 2 is a cross-sectional view of a connector body of the present utility model;

FIG. 3 is a cross-sectional view of a piston of the present utility model;

the reference numerals of the present utility model are as follows:

10. a connector body; 11. a driving medium inlet; 12. a pressure relief hole; 13. a first piston bore; 14. a second piston bore;

20. a piston; 21. a drive chamber; 22. a piston seal; 23. a piston body; 24. a piston outer ring;

30. a front end cover;

40. a first elastic seal; 41. a mounting hole;

50. a second elastic seal;

60. a leader sheet;

70. a mounting cavity;

80. and a return spring.

Detailed Description

The present utility model will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It is apparent that the drawings in the following description are only some examples or embodiments of the present utility model, and it is possible for those of ordinary skill in the art to apply the present utility model to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the utility model can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "a," "an," "the," and similar referents in the context of the utility model are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present utility model are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

Example 1

As shown in fig. 1, the present embodiment provides a medical balloon test structure including a connector body 10, a piston 20, a front end cap 30, and a first elastic seal member 40. The connector body 10 is provided with a hollow structure with two openings at two ends, a driving medium inlet 11 communicated with the inside of the connector body 10 is formed in the side wall of the connector body 10, and the connector body 10 is used for providing mounting and supporting functions; the piston 20 is of a hollow structure and is sleeved in the connector main body 10, a first end of the piston 20 is in sliding connection with the inner wall of the connector main body 10, a driving cavity 21 communicated with the driving medium inlet 11 is formed by matching the first end of the piston with the connector main body 10, two sides of the driving cavity 21 of the piston 20 are in sealing and sliding connection with the connector main body 10, and the piston 20 is used for moving based on the pressure in the driving cavity 21; the front end cover 30 is a hollow structure with two openings, the front end cover 30 is arranged at one opening of the connector main body 10, and is sleeved with the second end of the piston 20, so as to seal one side opening of the connector main body 10; the first elastic sealing member 40 is disposed in the front end cover 30, and the first elastic sealing member 40 is provided with a mounting hole 41 communicating with the piston 20 along its own axial direction, the inner diameter of the mounting hole 41 is gradually increased from the first end of the mounting hole 41 to the second end of the mounting hole 41, and hypotubes with different diameters are inserted into the mounting hole 41.

Under the condition that the driving medium is conveyed into the driving cavity 21 through the driving medium inlet 11 to increase the internal air pressure of the driving cavity 21, the driving medium can push the piston 20 to squeeze the first elastic sealing element 40, the first elastic sealing element 40 reduces the inner diameter of the mounting hole 41 to tightly wrap the hypotube, so that the first elastic sealing element 40 is in sealing connection with the hypotube, and virtual connection between the hypotube and the first elastic sealing element 40 is avoided; in addition, the pressure is uniformly distributed to the peripheral wall of the hypotube by the first elastic seal 40, and thus the occurrence of the indentation after the hypotube is pressed can be avoided.

Wherein the connector body 10 as a whole may be provided in a cylindrical shape and in a hollow structure.

Wherein the driving medium inlet 11 is used for connecting with an external pipe to obtain the driving medium, wherein the connection mode of the driving medium inlet 11 and the external pipe comprises but is not limited to threaded connection.

The driving medium obtained by the driving medium inlet 11 may be clean air.

Specifically, the connector body 10 may be composed of metal.

The piston 20 is disposed inside the connector body 10, and is capable of moving in the connector body 10 toward the front end cap 30 under the action of air pressure inside the driving chamber 21, so as to press the first elastic sealing member 40.

Preferably, the piston 20 is provided in a cylindrical sleeve configuration.

Wherein the drive chamber 21 is arranged around the circumference of the piston 20.

In some of these embodiments, the drive chamber 21 may be opened on a peripheral wall of the piston 20 in the circumferential direction of the piston 20.

The outer side wall of the front end cover 30 may be connected to the inner wall of the connector body 10, and the hollow structure of the front end cover 30 may be slidably sleeved on the second end of the piston 20.

The front end cap 30 may have a cross-shaped structure in a longitudinal section so as to be connected to the connector body 10 and to be sleeved on the second end of the piston 20.

The connection manner of the front end cover 30 and the connector body 10 includes, but is not limited to, common connection manners such as welding, threaded connection, and the like.

Wherein the first elastic sealing member 40 may be provided in a hollow cylindrical structure.

Wherein the first elastic sealing member 40 is made of an elastic material so that, in a case where the first elastic sealing member 40 is pressed, expansion occurs to reduce the inner diameter of the mounting hole 41, such as the first elastic sealing member 40 is made of a silicone material.

The outer wall of the first elastic sealing element 40 is not fixedly connected with the inner wall of the front end cover 30, so that the first elastic sealing element 40 cannot expand into the mounting hole 41 along the axial direction after being extruded.

For example, the first elastic sealing member 40 may be directly sleeved inside the hollow structure of the front end cover 30.

Wherein, the longitudinal extrusion force generated by the first elastic sealing element 40 after extrusion is uniformly dispersed on the pipe wall of the hypotube, thereby avoiding the self-sealing and the damage deformation of the hypotube caused by excessive extrusion at a single position.

Further, the inner diameter of the mounting hole 41 is gradually increased from the first end of the mounting hole 41 to the second end of the mounting hole 41 so as to facilitate insertion of hypotubes of different diameters.

Preferably, the mounting hole 41 is provided in a horn shape.

The first end of the mounting hole 41 is an end of the mounting hole 41 close to the piston 20, and the second end of the mounting hole 41 is an end of the mounting hole 41 far away from the piston 20.

Wherein, through setting up mounting hole 41 as loudspeaker formula to be convenient for insert the hypotube of different diameters, avoid the too big hypotube of diameter inconvenient inserting in the mounting hole 41.

In the case of inserting the hypotube, it is necessary to insert the opening of the hypotube into the opening of the mounting hole 41 to avoid clogging of the opening of the hypotube when the first elastic seal member 40 is expanded.

Preferably, in the case of inserting the hypotube, the opening of the hypotube may be inserted into the hollow structure of the piston to avoid clogging of the opening of the hypotube by the first elastomeric seal 40.

Further, the medical balloon testing structure further comprises a second elastic sealing element 50, wherein the second elastic sealing element 50 is arranged in a ring shape, sleeved in the front end cover 30, and positioned on one side of the first elastic sealing element 40 away from the piston 20, and is used for assisting in fixing a hypotube and cooperatively sealing.

Wherein the second elastic sealing member 50 has a circular ring-shaped structure.

Preferably, the second elastomeric seal 50 is an O-butyronitrile seal.

Preferably, the second elastic sealing member 50 is interference fit with the hypotube and has a certain friction force against the hypotube, thereby preventing the first sealing member 40 from sliding out of the first elastic sealing member 40 before wrapping the hypotube.

Under the condition that the hypotube is inserted into the second elastic sealing element 50, the second elastic sealing element 50 can wrap the hypotube to clamp the hypotube, and simultaneously seal between the outer wall of the hypotube and the inner wall of the second elastic sealing element 50, and also can avoid the hypotube from being ejected from the first sealing element 40 under the action of friction force due to the fact that the second elastic sealing element 50 clamps the hypotube.

Wherein the second resilient seal 50 also serves to provide guiding and support to prevent tilting or skewing of the hypotube.

The medical balloon test structure further comprises a front guide piece 60, wherein the front guide piece 60 is in a ring shape, sleeved in the front end cover 30, and positioned on one side of the second elastic sealing piece 50 away from the first elastic sealing piece 40 for guiding the hypotube to be inserted into the second elastic sealing piece 50.

In some embodiments, as shown in fig. 3, the piston 20 includes two piston seals 22, where the two piston seals 22 are sleeved on the first end of the piston 20 and located on two sides of the driving chamber 21 and the driving medium inlet 11, and the piston seals 22 are sealed and slidably connected with the inner wall of the connector body 10, and the two piston seals 22 are used to seal a gap between the first end of the piston 20 and the inner wall of the connector body 10 so as to seal two sides of the driving chamber 21.

The piston seal 22 may be an annular seal ring, such as an annular rubber ring, among others.

Wherein, both sides of the driving chamber 21 are sealed by two piston seals 22, thereby avoiding the leakage of the driving medium in the driving chamber 21, and realizing the adjustment of the air pressure in the driving chamber 21.

As shown in fig. 3, the piston 20 further includes a piston main body 23 and a piston outer ring 24. The piston main body 23 is of a hollow structure, and a piston sealing piece 22 is sleeved on the first end of the piston main body 23; the piston outer ring 24 is sleeved on the first end of the piston main body 23 and is positioned on one side of the driving medium inlet 11 away from the first end of the piston main body 23, and the piston outer ring 24 is sleeved with another piston sealing member 22.

The piston outer ring 24 is sleeved at the first end of the piston main body 23, so that when the piston outer ring 24 is slidably disposed in the connector main body 10, since the outer diameter of the piston outer ring 24 is larger than the outer diameter of the piston main body 23, a driving cavity 21 can be formed at one side of the piston outer ring 24 facing the driving medium inlet 11 to obtain driving medium, and the piston main body 23 and the piston outer ring 24 seal two sides of the driving cavity 21 through the piston sealing member 22, so that the driving medium in the driving cavity 21 is prevented from leaking to the outside from the inner walls of the piston main body 23 and the connector main body 10, and the piston outer ring 24 and the inner wall of the connector main body 10.

As shown in fig. 2, the connector body 10 includes a first piston bore 13 and a second piston bore 14. Wherein the first piston hole 13 is formed at the first end of the connector body 10 for mounting the first end of the piston body 23; a second piston bore 14 is provided at the second end of the connector body 10, the second piston bore 14 having an inner diameter larger than the inner diameter of the first piston bore 13, the second piston bore 14 being adapted to receive the piston outer ring 24 and the front end cap 30.

Specifically, the first piston hole 13 is slidably and sealingly connected to a piston seal 22 provided on the piston main body 23, and the second piston hole 14 is slidably and sealingly connected to a piston seal 22 provided on the piston outer ring 24.

The working principle of this embodiment is as follows:

inserting a hypotube of the medical balloon into the mounting hole 41, and inserting an open end of the hypotube into the mounting hole 41 near an opening of the piston 20;

filling a driving medium into the driving cavity 21 through the driving inlet to increase the air pressure inside the driving cavity 21;

the piston 20 moves in a direction approaching the front end cap 30 by the air pressure in the driving chamber 21 to press the first elastic sealing member 40;

after the first elastic sealing element 40 is extruded, the first elastic sealing element 40 expands to reduce the inner diameter of the mounting hole 41, so that the first elastic sealing element 40 wraps the hypotube, and the first elastic sealing element 40 is in sealing connection with the hypotube;

after the first elastic sealing member 40 is pressed, the first elastic sealing member 40 can press the second elastic sealing member 50, so that the second elastic sealing member 50 can also clamp and be in sealing connection with the hypotube.

The embodiment has reasonable structure, the driving medium is input into the driving cavity through the driving medium inlet to push the piston to extrude the first elastic sealing element and the second elastic sealing element to realize tight sealing, and the piston, the first elastic sealing element, the second elastic sealing element and the hypotube are arranged to be straight-through type, so that the influence of the medium flow is reduced.

The second elastic sealing element and the first elastic sealing element form a double-sealing cooperative structure, so that the test air tightness is improved, loosening of the hypotube before and after the test can be prevented, the longitudinal shearing force of the hypotube wall in the test process is dispersed, and damage to the hypotube in the test process is avoided; in addition, the mounting holes are horn-shaped, so that the hypotube with various diameters can be adapted.

Example 2

This embodiment is a modified embodiment of embodiment 1.

The outer diameter of the second end of the piston 20 is smaller than the inner diameter of the connector body 10 such that the second end of the piston 20 mates with the connector body 10, the front end cap 30 to form a mounting cavity 70.

The connector main body 10 comprises a pressure relief hole 12, the pressure relief hole 12 is formed in the connector main body 10 and is communicated with the mounting cavity 70, the pressure relief hole is used for relieving pressure in the mounting cavity 70, when the piston 20 moves towards the direction of the front end cover 30, the pressure in the mounting cavity 70 is prevented from being too high, and the piston 20 is also convenient to reset.

Further, the medical balloon test structure further comprises a plurality of return springs 80, wherein the plurality of return springs 80 are arranged in the mounting cavity 70 at intervals around the circumference of the piston 20, and two ends of the return springs 80 are respectively connected with the piston 20 and the front end cover 30 correspondingly, so that the piston 20 is reset after the piston 20 presses the first elastic sealing element 40.

Specifically, in the case where the piston 20 is pushed by the air pressure inside the drive chamber 21 toward the front end cover 30, the piston 20 presses the return spring 80, causing the return spring 80 to contract, and after the pressure in the drive chamber 21 is released, the return spring 80 can press the piston 20 away from the front end cover 30 to return.

The working principle of the utility model is as follows:

inserting a hypotube of the medical balloon into the mounting hole 41, and inserting an open end of the hypotube into the mounting hole 41 near an opening of the piston 20;

inputting a driving medium into the driving chamber 21 through the driving medium inlet 11 to increase the air pressure in the driving chamber 21;

the piston 20 is pushed to move in the direction of the front end cover 30 after the air pressure in the driving cavity 21 is increased, the piston 20 extrudes the reset spring 80 to shrink, and meanwhile, the piston 20 extrudes the first elastic sealing element 40 to expand to shrink the inner diameter of the mounting hole 41, so that the first elastic sealing element 40 wraps the hypotube of the medical balloon, namely, the first elastic sealing element 40 is in sealing connection with the hypotube;

delivering a test medium into the connector body 10 and the piston body 23 through the opening of the connector body 10 and delivering the test medium into the hypotube to test whether the hypotube is used normally;

after the hypotube is tested, the connector body 10 is depressurized, and then the inside of the drive chamber 21 is depressurized;

the piston 20 is restored under the action of the restoring spring 80, and at the same time, the first elastic sealing member 40 is not pressed any more, and the mounting hole 41 on the first elastic sealing member 40 is not pressed any more against the hypotube in the mounting hole 41, so that the hypotube is taken out.

The friction force of the second elastic sealing element 50 on the hypotube can also play a certain auxiliary fixing role, so that the hypotube is prevented from being ejected by pressure due to a small residual pressure in the connector body 10.

The utility model solves the problems that a plurality of joints are required to be prepared for product test and the time for disassembly and assembly is long in the existing base number, and also solves the problem that the joints are easy to break in the repeated use process when the joints of the manual connector are acrylonitrile-butadiene-styrene terpolymer plastic parts, thereby avoiding the self-sealing and the damage deformation of the hypotube caused by excessive extrusion at a single position due to the requirement of a rigid pipe penetrating support test on an automatic structure on the automatic connector.

According to the utility model, the first elastic sealing element and the second elastic sealing element are extruded by clean high-pressure air, and the reset spring is used for pushing the piston back to release quickly after pressure release, so that the testing efficiency is greatly improved, and the testing efficiency and the matching efficiency of products are improved. For plugging and testing of pipe test pieces such as straight pipes, drilling holes and pipe joints, the first elastic sealing piece can seal the outer wall of the test piece through compression expansion.

The utility model is especially suitable for being applied to an automatic test bench through air driving operation, and adopts the speed regulating pressure regulating valve piece and the foot switch to control the introduction and release of driving air pressure, so that the extrusion deformation of the elastic piece on the hypotube can be effectively buffered, the outer wall of the product is not damaged, the stress area of the hypotube is greatly increased by the double-sealing structure, and the lateral pressure on the test piece is reduced.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (8)

1. A medical balloon test structure, comprising:

the connector comprises a connector body, wherein the connector body is of a hollow structure with two openings, and a driving medium inlet communicated with the inside of the connector body is formed in the side wall of the connector body;

the piston is of a hollow structure and is sleeved in the connector main body, the first end of the piston is in sliding connection with the inner wall of the connector main body, a driving cavity communicated with the driving medium inlet is formed by matching the first end of the piston with the connector main body, and the piston is positioned at two side parts of the driving cavity and is in sealing and sliding connection with the connector main body;

the front end cover is of a hollow structure with two openings, is arranged at one opening of the connector main body and is sleeved with the second end of the piston;

the first elastic sealing piece is arranged in the front end cover, a mounting hole communicated with the piston is formed in the first elastic sealing piece along the axial direction of the first elastic sealing piece, the inner diameter of the mounting hole is gradually increased from the first end of the mounting hole to the second end of the mounting hole, and the mounting hole is internally used for inserting hypotubes with different diameters;

under the condition that the driving medium is conveyed into the driving cavity through the driving medium inlet to increase the internal air pressure of the driving cavity, the driving medium can push the piston to press the first elastic sealing piece, and the first elastic sealing piece reduces the inner diameter of the mounting hole to tightly wrap the hypotube.

2. The medical balloon test structure of claim 1, further comprising:

the second elastic sealing piece is arranged in an annular shape, sleeved in the front end cover and positioned on one side, away from the piston, of the first elastic sealing piece and used for assisting in fixing and cooperatively sealing the hypotube.

3. The medical balloon test structure of claim 2, further comprising:

the front guide piece is arranged in an annular shape, sleeved in the front end cover and positioned on one side, far away from the first elastic sealing piece, of the second elastic sealing piece and used for guiding the hypotube to be inserted into the second elastic sealing piece.

4. The medical balloon test structure of claim 2, wherein an outer diameter of the second end of the piston is smaller than an inner diameter of the connector body such that the second end of the piston mates with the connector body, the front end cap, to form a mounting cavity;

the connector body includes:

the pressure relief hole, the pressure relief hole set up in the connector main part, and communicate the installation cavity is used for avoiding the inside pressure of installation cavity is too big.

5. The medical balloon test structure of claim 4, further comprising:

the reset springs are arranged in the mounting cavity at intervals around the circumference of the piston, and two ends of the reset springs are respectively connected with the piston and the front end cover in a corresponding mode and are used for resetting the piston after the piston extrudes the first elastic sealing piece.

6. The medical balloon test structure of any one of claims 1-5, wherein the piston comprises:

the two piston sealing pieces are sleeved at the first end of the piston and are positioned at the two sides of the driving cavity and the driving medium inlet, the piston sealing pieces are in sealing and sliding connection with the inner wall of the connector main body, and the two piston sealing pieces are used for sealing gaps between the first end of the piston and the inner wall of the connector main body so as to seal the two sides of the driving cavity.

7. The medical balloon test structure of claim 6, wherein the piston comprises:

the piston main body is of a hollow structure, and a piston sealing piece is sleeved on the first end of the piston main body;

the piston outer ring is sleeved on the first end of the piston main body and is positioned on one side of the driving medium inlet away from the first end of the piston main body, and the piston outer ring is sleeved with another piston sealing piece.

8. The medical balloon test structure of claim 7, wherein the connector body comprises:

the first piston hole is formed in the first end of the connector body and is used for installing the first end of the piston body;

the second piston hole is formed in the second end of the connector body, the inner diameter of the second piston hole is larger than that of the first piston hole, and the second piston hole is used for installing the piston outer ring and the front end cover.