Air pipe for air pump

Abstract

The invention relates to an air pipe for an air pump and belongs to the technical field of pipeline structures. The air pipe for the air pump comprises a pipe body, a connector assembly, a second connector and a first sealing piece. The joint assembly is sleeved at the end part of the pipe body; the second connector is provided with a first end and a second end, the first end is connected with the air nozzle, the second end is rotatably connected with the connector assembly, the second connector is connected to the outer side of the connector assembly in a sleeving mode, and the pipe body is communicated with the air nozzle through the second connector; the first sealing piece is movably arranged on the outer side of the connector assembly in a sleeving mode in the length direction of the connector assembly, and the first sealing piece is used for sealing the connector assembly and the second connector; the interval size between the connector assembly and the inner wall of the second connector is gradually reduced from the side, facing the first end, of the connector assembly to the side, facing the second end, of the connector assembly. According to the air pipe for the air pump, the risk of air leakage at the joint between the air pipe and the air nozzle can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline structures, and in particular to an air pipe for an air pump. Background Art

[0002] There are a wide variety of air pumps on the market, all of which pump air into paddle boards, tents, kites, kayaks and other products that need to be inflated.

[0003] When the air pump is in use, a hose is needed to connect the air pump to the inflatable product. One end of the hose is connected to the air nozzle of the air pump itself, and the other end is mechanically connected to the air nozzle at the air inlet valve of the inflatable product. In actual application, when the air pump inflates the inflatable product through the air pipe, a large amount of air flows through the air pipe, which increases the internal pressure of the air pipe. The air pressure gradually increases, and this air pressure exerts an outward force on the inner wall of the air pipe, which helps to straighten the air pipe from a twisted and bent state. The air pipe begins to harden. The air pipe may be in a twisted and bent state before ventilation begins. The deformation process of the air pipe may cause the air pipe to rotate relative to the air nozzle; Most air pipes are connected to the air nozzle through a rotatable inner and outer sleeve structure. In order to allow the air pipe to rotate smoothly, a certain movable gap is reserved between the inner and outer sleeves. When the air pressure in the inflatable product increases to the point of being almost full, the air pressure on the inner and outer sleeves also increases, and air may leak from the gap between the inner and outer sleeves. On the one hand, it will slow down the inflation speed. On the other hand, the leaked airflow may cause the air pipe to move or vibrate relative to the air nozzle, increasing the risk of the air pipe falling from the air nozzle and causing a safety accident. Summary of the invention

[0004] The purpose of the present application is to provide an air pipe for an air pump in order to address the above-mentioned problem, which can reduce the risk of air leakage at the connection between the air pipe and the air nozzle, thereby improving the above-mentioned problem.

[0005] This application is achieved through the following technical solutions: The present application provides an air pipe for an air pump, which includes a pipe body, a joint assembly, a second joint and a first sealing member; the joint assembly is sleeved on the end of the pipe body; the second joint has a first end and a second end, the first end is connected to the air nozzle, and the second end is rotatably connected to the joint assembly, the second joint is sleeved on the outside of the joint assembly, and the pipe body and the air nozzle are connected through the second joint; the first sealing member is movably sleeved on the outside of the joint assembly along the length direction of the joint assembly, and the first sealing member is used to seal the joint assembly and the second joint; wherein the spacing between the inner walls of the joint assembly and the second joint gradually decreases from the side of the joint assembly toward the first end to the side of the joint assembly toward the second end.

[0006] In the technical solution of the embodiment of the present application, during actual use, when the air pump is inflating the inflatable product through the air tube, a large amount of air flows through the air tube, which increases the internal pressure of the air tube. This air pressure exerts an outward force on the inner wall of the air tube, straightening the air tube from a twisted and bent state, and the air tube may be in a twisted and bent state before ventilation begins. The deformation process of the air tube causes the rotation of the tube body. The rotation of the tube body drives the joint assembly to rotate compared to the second joint connected to the air nozzle, which does not affect the stable connection between the second joint and the air nozzle. Then, the air pressure between the joint assembly and the second joint increases with the increase of the internal air pressure of the inflatable product, and the second joint is rotated. A sealing member is movably sleeved on the outer side of the joint assembly along the length direction of the joint assembly, so that when the internal air pressure of the inflatable product increases, the air pressure on the side of the first sealing member facing the air nozzle increases, pushing the first sealing member to move or deform along the joint assembly toward the second end, and the spacing between the inner wall of the joint assembly and the second joint gradually decreases from the side of the joint assembly facing the first end to the side of the joint assembly facing the second end, so that the pressure on the first sealing member from the inner walls of the joint assembly and the second joint increases during the process of moving or deforming toward the second end, thereby improving the sealing effect between the joint assembly and the second joint, and when the first sealing member is subjected to the air pressure toward the first end, the pressure on the first sealing member from the inner walls of the joint assembly and the second joint increases. When the air pressure received is small (the second joint is separated from the air nozzle or the internal air pressure of the inflatable product is small), the first sealing member can move or deform along the joint assembly toward the first end under the action of its own elastic force, reducing the interaction force between the second joint and the joint assembly, so that the second joint and the joint assembly can rotate with each other more easily. On the one hand, the tube body can rotate and deform by itself when the internal air pressure of the inflatable product is small to release its own stress, reduce the risk of damage to the tube body due to excessive internal stress, and increase the service life of the tube body. The shape of the deformed tube body can be close to straight, reducing the deceleration of the airflow in the tube body, and increasing the flow speed of the gas in the tube body. On the other hand, the impact of the rotation of the tube body can be retained between the joint assembly and the second joint without easily affecting the connection between the second joint and the air nozzle, thereby reducing the risk of air leakage, loose connection, or even tube falling off between the tube body and the air nozzle caused by the rotation of the second joint, and improving the connection stability between the tube body and the air nozzle; on the other hand, when the internal air pressure of the inflatable product is high, the first sealing component can adaptively move or deform according to the internal air pressure of the inflatable product to improve the sealing effect between the joint assembly and the second joint, reduce the risk of gas leakage between the two, and improve the safety of the air pipe.

[0007] In some embodiments, the joint assembly includes a first joint, the first joint is provided with a first connecting portion, and the second joint is provided with a second connecting portion near the second end; the first connecting portion is connected to the second connecting portion so that the first joint is connected to the second end, the first end is connected to the air nozzle, and the tube body and the air nozzle are connected through the second joint.

[0008] The first joint is provided with a first connecting portion, and the second joint is provided with a second connecting portion near the second end; the first connecting portion and the second connecting portion are engaged to connect the first joint to the second end, the tube body is coaxial with the first joint, and the first joint and the second joint are coaxially arranged, so that the tube body and the gas nozzle are coaxially arranged, so that the gas can enter and exit the tube body more smoothly, thereby reducing the risk of excessive pressure exerted by the gas at the connection between the tube body and the gas nozzle when passing through the connection, resulting in loose connection or leakage. The first end is connected to the gas nozzle (via a threaded connection), and the tube body and the gas nozzle are connected through the second joint.

[0009] In some embodiments, the first connection portion is an external thread, the second connection portion is an internal thread adapted to the first connection portion, and the first joint and the second joint are threadedly connected via the first connection portion and the second connection portion.

[0010] In the technical solution of the embodiment of the present application, the first connecting part is an external thread, and the second connecting part is an internal thread adapted to the first connecting part. The matching structure of the external thread and the internal thread is simple and the effect is stable.

[0011] In some embodiments, a partition is provided on the inner wall of the second joint, a surface of the partition facing the first end is in contact with the air nozzle, a first air vent is provided at the center of the partition, the first air vent is opposite to the opening of the air nozzle, and the tube body is connected with the air nozzle through the first air vent; in the radial direction of the tube body, the size of the first air vent is smaller than the size of the tube body.

[0012] In the technical solution of the embodiment of the present application, the surface of the partition facing the first end is in contact with the gas nozzle, so that the connection between the partition and the gas nozzle is stable, the second joint is restricted from rotating on its own, and the risk of loosening of the connection between the second joint and the gas nozzle is reduced. A first air vent is arranged at the center of the partition, and the first air vent is directly opposite to the opening of the gas nozzle. The tube body is connected with the gas nozzle through the first air vent. In the radial direction of the tube body, the diameter of the first air vent can be slightly smaller than the inner diameter of the gas nozzle. Under the premise of similar pressure, the smaller the size of the flow path, the faster the flow rate of the fluid. The diameter of the first air vent can be slightly smaller than the inner diameter of the gas nozzle, so that the gas flow The speed is increased when passing through the first air vent, so that the gas enters the tube body (or air nozzle) more quickly, thereby accelerating the inflation speed of the inflatable product using the air pump of the air pipe provided in the present application; in addition, the flow direction of the gas can be limited by the first air vent, so that the gas leaving the air nozzle (or tube body) can directly enter the tube body (or air nozzle) under the guidance of the first air vent, which can accelerate the flow speed of the gas while avoiding the situation where the gas applies air pressure to the end faces of the first joint and the air nozzle located on the inner side of the second joint, thereby pushing the first joint and the air nozzle out of the second joint, thereby improving the connection stability between the first joint and the air nozzle and the second joint.

[0013] In some embodiments, a sealing groove is provided on the surface of the partition portion facing the first end, and the sealing groove is provided around the first vent; a second sealing member for sealing the partition portion and the air nozzle is provided inside the sealing groove.

[0014] In the technical solution of the embodiment of the present application, a sealing groove is provided on the surface of the partition facing the first end, and a second seal for sealing the partition and the gas nozzle is provided on the inner side of the sealing groove. The second seal can improve the sealing effect between the partition and the gas nozzle and reduce the effect of gas leakage between the partition and the gas nozzle. The sealing groove is arranged around the first air vent, so that the second seal can be arranged around the connection between the partition and the gas nozzle, so that the second seal has a stable and effective protective effect on the air leakage problem between the partition and the gas nozzle.

[0015] In some embodiments, the joint assembly also includes a third joint, which is arranged between the tube body, the first joint and the second joint, the third joint is in contact with the first joint, the tube body is sleeved on the outside of the third joint, the third joint is provided with a second air vent, the second air vent is connected with the first air vent, and the tube body is connected with the air nozzle through the first air vent and the second air vent.

[0016] In the technical solution of the embodiment of the present application, the third joint is in contact with the first joint, the tube body is sleeved on the third joint, the third joint and the tube body rotate synchronously, the first joint and the second joint rotate synchronously, and the third joint rotates relative to the first joint and the second joint. When the pressure on the side of the first seal toward the first end is too large, the movement or deformation of the first seal will cause the third joint to abut against the first joint, thereby limiting the movement or rotation of the third joint, reducing the risk of the third joint continuing to move or rotate when the internal air pressure of the inflatable product is large, resulting in a gap between the third joint and the first seal and the second joint. The third joint is provided with a second air vent, the second air vent is connected with the first air vent, and the tube body is connected with the air nozzle through the first air vent and the second air vent. The first air vent and the second air vent guide the gas directly into the tube body (or air nozzle), reducing the time that the gas stays on the inner side of the second joint, and accelerating the inflation speed of the inflatable product using the air pump of the air pipe provided in the present application.

[0017] In some embodiments, a second convex ring is provided on the surface of the partition portion facing the second end, and the second convex ring is provided around the first vent; the second vent includes a first mouth segment and a second mouth segment, the inner diameter of the first mouth segment is larger than the inner diameter of the second mouth segment, the first mouth segment is closer to the partition portion than the second mouth segment, the inner wall of the first mouth segment is in contact with the outer peripheral surface of the second convex ring, and the inner diameter of the second mouth segment is not smaller than the first vent.

[0018] In the technical solution of the embodiment of the present application, a second convex ring is provided on the surface of the partition portion facing the second end, and the second air vent includes a first section and a second section. The inner wall of the first section fits with the outer peripheral surface of the second convex ring, so that the first section can effectively limit the movement of the second convex ring in a direction parallel to the axial direction of the first air vent through the outer peripheral surface of the convex ring. At the same time, the inner wall of the first section does not do work on the second convex ring, thereby reducing the risk of the first section driving the second convex ring to rotate. The inner diameter of the second section is not smaller than the first air vent, so that the gas entering the tube body through the first vent is not easy to impact the step surface formed between the first section and the second section, thereby reducing the risk of the step surface formed between the first section and the second section moving under the push of the gas, resulting in loose connection between the third joint and the first joint.

[0019] In some embodiments, a third convex ring protrudes from the outer peripheral surface of the third joint, and the surface of the third convex ring facing away from the partition portion contacts the surface of the first joint facing the partition portion; there is a gap between the inner wall of the first joint and the tube body, and the third joint is located on the inner side of the first joint.

[0020] In the technical solution of the embodiment of the present application, a third convex ring protrudes from the outer peripheral surface of the third joint, and the surface of the third convex ring facing away from the partition portion contacts the surface of the first joint facing the partition portion, so that the contact area between the third joint and the first joint is larger, thereby preventing the third joint and the first joint from rotating relative to each other, causing the contact position between the two to be damaged due to concentrated friction; there is a gap between the inner wall of the first joint and the tube body, and the third joint is located on the inner side of the first joint, so that there can be a larger gap between the inner wall of the first joint and the outer peripheral surface of the third joint, which is convenient for the connection between the tube body and the third joint.

[0021] In some embodiments, there is a gap between the third convex ring and the inner wall of the second joint, the first seal is sleeved on the third joint and located between the partition and the third convex ring, and the inner diameter of the first seal is smaller than the outer diameter of the third convex ring.

[0022] In the technical solution of the embodiment of the present application, there is a gap between the third convex ring and the inner wall of the second joint, which reduces the contact area between the third joint and the second joint, thereby reducing the risk of the third joint driving the second joint to rotate. The inner diameter of the first seal is smaller than the outer diameter of the third convex ring, which limits the movement or deformation direction of the first seal, reduces the risk of the first seal being difficult to recover by its own elasticity after being over-squeezed by the second joint and the joint assembly, and avoids the risk of the first seal exerting pressure on the first connection part on the first joint to affect the fit between the first connection part and the second connection part.

[0023] In some embodiments, part of the joint assembly is located on the inner side of the second joint, and another part of the joint assembly exceeds the second end. A fourth protruding ring is provided on the outer peripheral surface of the part of the joint assembly exceeding the second end. The outer peripheral surface of the fourth protruding ring exceeds the inner wall of the second joint, and the fourth protruding ring overlaps the second end.

[0024] In the technical solution of the embodiment of the present application, a fourth convex ring is provided on the outer circumferential surface of the joint assembly exceeding the second end portion, the outer circumferential surface of the fourth convex ring exceeds the inner wall of the second joint, the fourth convex ring overlaps the second end, and the fourth convex ring limits the length of the portion of the joint assembly extending into the inner side of the second joint, thereby preventing the joint assembly (or pushing the third joint) from abutting against the second joint, thereby reducing the risk of driving the second joint when the joint assembly rotates driven by the tube body.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of an air pipe for an air pump provided in some embodiments of the present application; Figure 2 A front view of an air pipe for an air pump provided in some embodiments of the present application; Figure 3 for Figure 2 Partial cross-sectional view at AA in the middle; Figure 4 When not connected to the air nozzle Figure 2 Partial cross-sectional view at AA in the middle; Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0028] Icons: 1-tube body; 10-connector assembly; 2-first connector; 20-first connection part; 21-fourth convex ring; 3-second connector; 30-second connection part; 31-first end; 32-second end; 33-partitioning part; 330-first vent; 331-sealing groove; 332-second seal; 333-second convex ring; 4-third connector; 40-second vent; 400-first mouth section; 401-second mouth section; 41-third convex ring; 42-first seal; 5-air nozzle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0031] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0034] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0035] According to some embodiments of the present application, optionally, Figure 1 to Figure 5 As shown, the present application provides an air pipe for an air pump, which includes a pipe body 1, a joint assembly 10, a second joint 3 and a first sealing member 42; the joint assembly 10 is sleeved on the end of the pipe body 1; the second joint 3 has a first end 31 and a second end 32, the first end 31 is connected to the air nozzle 5, and the second end 32 is rotatably connected to the joint assembly 10, the second joint 3 is sleeved on the outside of the joint assembly 10, and the pipe body 1 and the air nozzle 5 are connected through the second joint 3; the first sealing member 42 is movably sleeved on the outside of the joint assembly 10 along the length direction of the joint assembly 10, and the first sealing member 42 is used to seal the joint assembly 10 and the second joint 3; wherein, the spacing between the inner walls of the joint assembly 10 and the second joint 3 is gradually reduced from the side of the joint assembly 10 toward the first end 31 to the side of the joint assembly 10 toward the second end 32.

[0036] The tube body 1 can be made of a relatively soft and elastic material, such as rubber, polyvinyl chloride, polyethylene, chloroprene rubber, polyurethane, etc. It is convenient for users to coil or bend the tube body 1 to reduce the space it occupies, making it easy to move and carry.

[0037] The joint assembly 10 and the second joint 3 may be made of a material with a certain structural strength, so that the connection between the joint assembly 10, the second joint 3 and the gas nozzle 5 can have a high stability; The inner diameter of the air nozzle 5 can be close to the inner diameter of the tube body 1, so that the pressure applied by the gas to the tube body 1 during inflation can be close to the air nozzle 5, reducing the risk of damage to the tube body 1 due to excessive internal pressure of the tube body 1.

[0038] A portion of the inner wall of the second joint 3 close to the first end 31 may be provided with threads for connecting with the gas nozzle 5 .

[0039] The air nozzle 5 mentioned in the present application may be the air nozzle 5 at the air outlet valve of an air pump or the air nozzle 5 at the air inlet valve of an inflatable product.

[0040] The material of the first sealing member 42 may be, but is not limited to, polyurethane (PU), rubber (such as nitrile rubber NBR, fluororubber FKM, etc.), thermoplastic elastomer (TPE), etc.

[0041] The surface of the first seal 42 other than the contact surface with the third joint 4 and the third convex ring 41 can be coated with lubricant, so that when the first seal 42 and the third joint 4 rotate synchronously, the friction between the first seal 42 and the second joint 3 is smaller, thereby reducing the risk of the second joint 3 being driven to rotate by the first seal 42, and also reducing the risk of the second joint 3 and the first seal 42 being damaged due to mutual friction between the two.

[0042] In actual use, when the air pump inflates the inflatable product through the air tube, a large amount of air flows through the air tube, increasing the internal pressure of the air tube. This air pressure exerts an outward force on the inner wall of the air tube, straightening the air tube from a twisted and bent state. The air tube may be in a twisted and bent state before ventilation begins. The deformation process of the air tube causes the tube body 1 to rotate. The rotation of the tube body 1 drives the joint assembly 10 (mainly the third joint 4) to rotate compared to the second joint 3 (and the first joint 2) connected to the air nozzle 5, without affecting the stable connection between the second joint 3 and the air nozzle 5. Then, the air pressure between the joint assembly 10 and the second joint 3 increases with the increase of the internal air pressure of the inflatable product, and the first sealing member 42 is connected to the air nozzle 5. The head component 10 can be movably sleeved on the outer side of the joint component 10 in the length direction, so that when the internal air pressure of the inflatable product increases, the air pressure on the side of the first sealing component 42 facing the air nozzle 5 increases, pushing the first sealing component 42 to move or deform along the joint component 10 toward the second end 32, and the spacing between the joint component 10 and the inner wall of the second joint 3 is gradually reduced from the side of the joint component 10 facing the first end 31 to the side of the joint component 10 facing the second end 32, so that the pressure on the first sealing component 42 from the inner walls of the joint component 10 and the second joint 3 during the movement or deformation toward the second end 32 increases, thereby improving the sealing effect between the joint component 10 and the second joint 3, and when the first sealing component 4 2 When the air pressure received by the first end 31 is small (the second joint 3 is separated from the air nozzle 5 or the internal air pressure of the inflatable product is small), the first sealing member 42 can move or deform along the joint assembly 10 toward the first end 31 under the action of its own elastic force, reducing the interaction force between the second joint 3 and the joint assembly 10, so that the second joint 3 and the joint assembly 10 can be relatively easily rotated relative to each other. On the one hand, the tube body 1 can rotate and deform by itself when the internal air pressure of the inflatable product is small to release its own stress, reduce the risk of damage to the tube body 1 due to excessive internal stress, and improve the service life of the tube body 1. The shape of the deformed tube body 1 can be close to straight, reducing the situation of airflow turning and decelerating inside the tube body 1, and improving the gas in the tube body 1. On the other hand, the internal flow speed is increased, thereby improving the inflation speed of the inflatable product by the air pump; on the other hand, the impact of the rotation of the tube body 1 can be retained between the joint assembly 10 and the second joint 3 without easily affecting the connection between the second joint 3 and the air nozzle 5, reducing the risk of air leakage, loose connection, or even falling off of the tube body 1 caused by the rotation of the second joint 3, and improving the connection stability between the tube body 1 and the air nozzle 5; on the other hand, when the internal air pressure of the inflatable product is relatively high, the first sealing member 42 can be adaptively moved or deformed according to the internal air pressure of the inflatable product to improve the sealing effect between the joint assembly 10 and the second joint 3, reduce the risk of gas leakage between the two, and improve the safety of the air pipe.

[0043] According to some embodiments of the present application, optionally, the joint assembly 10 includes a first joint 2, the first joint 2 is provided with a first connecting portion 20, and the second joint 3 is provided with a second connecting portion 30 near the second end 32; the first connecting portion 20 is connected to the second connecting portion 30 so that the first joint 2 is connected to the second end 32, the first end 31 is connected to the air nozzle 5, and the tube body 1 is connected to the air nozzle 5 through the second joint 3.

[0044] The first connection portion 20 can be arranged on the outer wall of the first joint 2, and the second connection portion 30 can be arranged on the inner wall of the second joint 3. At least a portion of the first joint 2 extends into the second joint 3 and is connected to the second joint 3 through the first connection portion 20, so that the distance between the inner wall of the first joint 2 and the tube body 1 is closer, thereby limiting the deformation or bending range of the portion close to the first joint 2, reducing the risk of the tube body 1 being ruptured due to the concentrated pressure at the bending point during the inflation process caused by the excessive bending angle of the portion of the tube body 1 close to the first joint 2; or, the first connection portion 20 can be arranged on the inner wall of the first joint 2, and the second connection portion 30 can be arranged on the outer wall of the second joint 3, at least a portion of the second joint 3 extends into the first joint 2 and is rotatably connected to the first joint 2 through the second connection portion 30, so that the portion of the tube body 1 close to the first joint 2 is not easily limited by the first joint 2, so that the tube body 1 is easier to be bent and wound and then moved, reducing the difficulty of using the tube body 1.

[0045] The first joint 2 can be transitionally matched with the second joint 3, so that the first joint 2 and the second joint 3 can exert a certain stress on each other, thereby improving the connection stability between the first joint 2 and the second joint 3.

[0046] The first connection part 20 and the second connection part 30 may be connected by welding, glue, etc., but are not limited to.

[0047] The first joint 2 is provided with a first connection portion 20, and the second joint 3 is provided with a second connection portion 30 near the second end 32; the first connection portion 20 and the second connection portion 30 are engaged to connect the first joint 2 to the second end 32, the tube body 1 is coaxial with the first joint 2, the first joint 2 and the second joint 3 are coaxially arranged, and the tube body 1 and the gas nozzle 5 are coaxially arranged, so that the gas can enter and exit the tube body 1 more smoothly, thereby reducing the risk of excessive pressure applied to the connection between the tube body 1 and the gas nozzle 5 when the gas passes through the connection, resulting in loose connection or gas leakage, the first end 31 is connected to the gas nozzle 5 (through a threaded connection), and the tube body 1 and the gas nozzle 5 are connected through the second joint 3; According to some embodiments of the present application, optionally, Figure 3 to Figure 5 As shown, the first connection part 20 is an external thread, the second connection part 30 is an internal thread adapted to the first connection part 20 , and the first joint 2 and the second joint 3 are threadedly connected via the first connection part 20 and the second connection part 30 .

[0048] The first connection part 20 is an external thread, and the second connection part 30 is an internal thread adapted to the first connection part 20. The matching structure of the external thread and the internal thread is simple and the effect is stable.

[0049] According to some embodiments of the present application, optionally, Figure 3-4 As shown, a partition 33 is provided on the inner wall of the second joint 3, and the surface of the partition 33 facing the first end 31 abuts against the air nozzle 5. A first air vent 330 is provided at the center of the partition 33, and the first air vent 330 is opposite to the opening of the air nozzle 5. The tube body 1 is connected with the air nozzle 5 through the first air vent 330; in the radial direction of the tube body 1, the size of the first air vent 330 is smaller than the size of the tube body 1.

[0050] The partition portion 33 is located between the second connecting portion 30 and the internal thread of the inner wall near the first end 31 of the second joint 3 .

[0051] The diameter of the first vent 330 is close to the inner diameter of the gas nozzle 5, so that the air pressure at the first vent 330 is close to the pressure inside the gas nozzle 5, avoiding the excessive difference in the internal pressures of the two to affect the flow of gas.

[0052] The surface of the partition 33 facing the first end 31 abuts against the gas nozzle 5, so that the connection between the partition 33 and the gas nozzle 5 is stable, the second joint 3 is restricted from rotating on its own, and the risk of the connection between the second joint 3 and the gas nozzle 5 becoming loose is reduced. A first air vent 330 is provided at the center of the partition 33, and the first air vent 330 is directly opposite to the opening of the gas nozzle 5. The tube body 1 is connected to the gas nozzle 5 through the first air vent 330. In the radial direction of the tube body 1, the diameter of the first air vent 330 can be slightly smaller than the inner diameter of the gas nozzle 5. Under the premise of similar pressure, the smaller the size of the flow path, the faster the flow rate of the fluid. The diameter of the first air vent 330 can be slightly smaller than the inner diameter of the gas nozzle 5, so that the gas flows through The speed is increased when the gas passes through the first air vent 330, so that the gas enters the tube body 1 (or the air nozzle 5) more quickly, thereby accelerating the inflation speed of the inflatable product using the air pump of the air pipe provided in the present application; in addition, the flow direction of the gas can also be limited by the first air vent 330, so that the gas leaving the air nozzle 5 (or the tube body 1) can directly enter the tube body 1 (or the air nozzle 5) under the guidance of the first air vent 330, which can accelerate the flow speed of the gas and prevent the gas from applying air pressure to the end faces of the first joint 2 and the air nozzle 5 located on the inner side of the second joint 3, thereby pushing the first joint 2 and the air nozzle 5 out of the second joint 3, thereby improving the connection stability between the first joint 2 and the air nozzle 5 and the second joint 3.

[0053] According to some embodiments of the present application, optionally, Figure 3-4As shown, a sealing groove 331 is provided on the surface of the partition 33 facing the first end 31 , and the sealing groove 331 is arranged around the first vent 330 ; a second sealing member 332 for sealing the partition 33 and the air nozzle 5 is provided inside the sealing groove 331 .

[0054] The second sealing member 332 extends beyond the sealing groove 331 , and the air nozzle 5 presses the second sealing member 332 into the sealing groove 331 and abuts against the surface of the partition portion 33 facing the first end 31 .

[0055] Seals are materials or parts that prevent fluids or solid particles from leaking between adjacent mating surfaces and prevent external impurities such as dust and moisture from invading components inside machinery and equipment.

[0056] The second seal 332 can be an O-ring (i.e., a rubber ring with a circular cross-section). After being pressed into the sealing groove 331 by the air nozzle 5, the second seal 332 can be deformed to fill the sealing groove 331, so that the contact area between the second seal 332 and the sealing groove 331 is larger. The sealing groove 331 can press the air nozzle 5 through the second seal 332, making it less likely for air to leak between the air nozzle 5 and the partition 33, while having a better effect on limiting the self-rotation of the second joint 3 relative to the air nozzle 5.

[0057] The material of the second sealing member 332 may be, but is not limited to, polyurethane (PU), rubber (such as nitrile rubber NBR, fluororubber FKM, etc.), thermoplastic elastomer (TPE), etc.

[0058] A sealing groove 331 is provided on the surface of the partition 33 facing the first end 31, and a second sealing member 332 for sealing the partition 33 and the gas nozzle 5 is provided on the inner side of the sealing groove 331. The second sealing member 332 can enhance the sealing effect between the partition 33 and the gas nozzle 5 and reduce the effect of gas leakage between the partition 33 and the gas nozzle 5. The sealing groove 331 is provided around the first air vent 330, so that the second sealing member 332 can be provided around the connection between the partition 33 and the gas nozzle 5, so that the protection effect of the second sealing member 332 on the gas leakage problem between the partition 33 and the gas nozzle 5 is stable and effective.

[0059] According to some embodiments of the present application, optionally, Figure 3-4 As shown, the joint assembly 10 also includes a third joint 4, which is arranged between the tube body 1, the first joint 2 and the second joint 3, the third joint 4 is in contact with the first joint 2, the tube body 1 is sleeved on the outside of the third joint 4, the third joint 4 is provided with a second air vent 40, the second air vent 40 is connected to the first air vent 330, and the tube body 1 is connected to the air nozzle 5 through the first air vent 330 and the second air vent 40.

[0060] A movable gap may be reserved between the third joint 4 and the partition 33 and the inner wall of the second joint 3 to reduce the friction force applied to the second joint 3 when the third joint 4 rotates synchronously with the tube body 1, thereby reducing the risk of the second joint 3 being driven by the third joint 4 to rotate.

[0061] The tube body 1 can be connected to the third joint 4 by threads, and sealing glue can be filled between the tube body 1 and the third joint 4 to prevent air leakage therebetween.

[0062] The third joint 4 is in contact with the first joint 2, the tube body 1 is sleeved on the third joint 4, the third joint 4 rotates synchronously with the tube body 1, the first joint 2 rotates synchronously with the second joint 3, and the third joint 4 rotates relative to the first joint 2 and the second joint 3. When the pressure on the side of the first seal 42 toward the first end 31 is too large, the movement or deformation of the first seal 42 will cause the third joint 4 to abut against the first joint 2, thereby limiting the movement or rotation of the third joint 4, reducing the risk of the third joint 4 continuing to move or rotate when the internal air pressure of the inflatable product is large, resulting in a gap between the third joint 4 and the first seal 42 and the second joint 3. The third joint 4 is provided with a second air vent 40, the second air vent 40 is connected to the first air vent 330, the tube body 1 is connected to the air nozzle 5 through the first air vent 330 and the second air vent 40, the first air vent 330 and the second air vent 40 guide the gas to directly enter the tube body 1 (or the air nozzle 5), reduce the time that the gas stays on the inner side of the second joint 3, and speed up the inflation speed of the inflatable product using the air pump of the air pipe provided in the present application.

[0063] According to some embodiments of the present application, optionally, Figure 3-4 As shown, a second convex ring 333 is provided on the surface of the partition portion 33 facing the second end 32, and the second convex ring 333 is arranged around the first vent 330; the second vent 40 includes a first opening segment 400 and a second opening segment 401, the inner diameter of the first opening segment 400 is larger than the inner diameter of the second opening segment 401, the first opening segment 400 is closer to the partition portion 33 than the second opening segment 401, the inner wall of the first opening segment 400 is in contact with the outer peripheral surface of the second convex ring 333, and the inner diameter of the second opening segment 401 is not less than the first vent 330.

[0064] In the axial direction of the first joint 2, the size of the first mouth section 400 can be slightly larger than the second convex ring 333, so that there is a gap between the end surface of the second convex ring 333 facing away from the partition plate and the step surface formed between the first mouth section 400 and the second mouth section 401, thereby reducing the contact area between the second convex ring 333 and the third joint 4 and reducing the risk of the third joint 4 driving the first joint 2 to rotate.

[0065] A second convex ring 333 is provided on the surface of the partition portion 33 facing the second end 32, and the second air vent 40 includes a first section 400 and a second section 401. The inner wall of the first section 400 fits with the outer circumferential surface of the second convex ring 333, so that the first section 400 can effectively limit the movement of the second convex ring 333 in a direction parallel to the axial direction of the first air vent 330 through the outer circumferential surface of the convex ring, and at the same time, the inner wall of the first section 400 does not do work on the second convex ring 333, thereby reducing the risk of the first section 400 driving the second convex ring 333 to rotate. The inner diameter of the second section 401 is not less than the first air vent 330, so that the gas entering the tube body 1 through the first air vent 330 is not easy to impact the step surface formed between the first section 400 and the second section 401, thereby reducing the risk of the step surface formed between the first section 400 and the second section 401 moving under the push of the gas, resulting in loose connection between the third joint 4 and the first joint 2.

[0066] According to some embodiments of the present application, optionally, Figure 3-4 As shown, a third convex ring 41 protrudes from the outer peripheral surface of the third joint 4, and the surface of the third convex ring 41 facing away from the partition 33 contacts the surface of the first joint 2 facing the partition 33; there is a gap between the inner wall of the first joint 2 and the tube body 1, and the third joint 4 is located on the inner side of the first joint 2.

[0067] The inner diameter of the first joint 2 is smaller than the outer diameter of the tube body 1 and larger than the outer diameter of the third protruding ring 41 , so that there is a gap between the first joint 2 and the tube body 1 while being able to contact the third joint 4 .

[0068] A third convex ring 41 protrudes from the outer circumferential surface of the third joint 4, and the surface of the third convex ring 41 facing away from the partition 33 contacts the surface of the first joint 2 facing the partition 33, so that the contact area between the third joint 4 and the first joint 2 is larger, thereby preventing the third joint 4 and the first joint 2 from rotating relative to each other, causing the contact position between the two to be damaged due to concentrated friction; there is a gap between the inner wall of the first joint 2 and the tube body 1, and the third joint 4 is located on the inner side of the first joint 2, so that there can be a larger gap between the inner wall of the first joint 2 and the outer circumferential surface of the third joint 4, which is convenient for the connection between the tube body 1 and the third joint 4.

[0069] According to some embodiments of the present application, optionally, Figure 3-4 As shown, there is a gap between the third convex ring 41 and the inner wall of the second joint 3 , the first seal 42 is sleeved on the third joint 4 and located between the partition 33 and the third convex ring 41 , and the inner diameter of the first seal 42 is smaller than the outer diameter of the third convex ring 41 .

[0070] There is a gap between the third convex ring 41 and the inner wall of the second joint 3, which reduces the contact area between the third joint 4 and the second joint 3, thereby reducing the risk of the third joint 4 driving the second joint 3 to rotate. The inner diameter of the first seal 42 is smaller than the outer diameter of the third convex ring 41, which limits the movement or deformation direction of the first seal 42, reduces the risk of the first seal 42 being difficult to recover by its own elasticity after being over-squeezed by the second joint 3 and the joint assembly 10, and avoids the risk of the first seal 42 exerting pressure on the first connection part 20 on the first joint 2 to affect the fit between the first connection part 20 and the second connection part 30.

[0071] According to some embodiments of the present application, optionally, Figure 3 to Figure 5 As shown, part of the joint assembly 10 is located on the inner side of the second joint 3, and the other part of the joint assembly 10 exceeds the second end 32. The outer peripheral surface of the joint assembly 10 exceeding the second end 32 is provided with a fourth convex ring 21. The outer peripheral surface of the fourth convex ring 21 exceeds the inner wall of the second joint 3, and the fourth convex ring 21 overlaps the second end 32.

[0072] A fourth convex ring 21 is provided on a portion of the outer circumference of the joint assembly 10 that exceeds the second end 32. The outer circumference of the fourth convex ring 21 exceeds the inner wall of the second joint 3. The fourth convex ring 21 overlaps the second end 32. The fourth convex ring 21 limits the length of the portion of the joint assembly 10 that extends into the inner side of the second joint 3, thereby preventing the joint assembly 10 (or pushing the third joint 4) from abutting against the second joint 3, thereby reducing the risk of driving the second joint 3 when the joint assembly 10 rotates under the drive of the tube body 1.

[0073] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An air pipe for an air pump, characterized in that: include: A tube body, for gas to pass through; A joint assembly, sleeved on the end of the pipe body; A second joint, having a first end and a second end, wherein the first end is connected to the gas nozzle, and the second end is rotatably connected to the joint assembly, the second joint is sleeved on the outside of the joint assembly, and the tube body is connected to the gas nozzle through the second joint; A first sealing member, movably sleeved on the joint assembly along the length direction of the joint assembly, the first sealing member being used to seal the joint assembly and the second joint; Wherein, the spacing between the joint assembly and the inner wall of the second joint gradually decreases from the first end to the second end.

2. The air pipe for an air pump according to claim 1, characterized in that: The joint assembly includes a first joint, the first joint is provided with a first connection portion, and the second joint is provided with a second connection portion near the second end; The first connection portion is connected to the second connection portion so that the first joint is connected to the second end, the first end is connected to the gas nozzle, and the tube body is connected to the gas nozzle through the second joint.

3. The air pipe for an air pump according to claim 2, characterized in that: The first connection portion is an external thread, the second connection portion is an internal thread adapted to the first connection portion, and the first joint and the second joint are threadedly connected via the first connection portion and the second connection portion.

4. The air pipe for an air pump according to claim 2, characterized in that: The inner wall of the second joint is provided with a partition, the surface of the partition facing the first end is in contact with the gas nozzle, a first vent is provided at the center of the partition, the first vent is directly opposite to the opening of the gas nozzle, and the tube body is connected with the gas nozzle through the first vent; In the radial direction of the tube body, the size of the first vent is smaller than the size of the tube body.

5. The air pipe for an air pump according to claim 4, characterized in that: A sealing groove is provided on the surface of the partition portion facing the first end, and the sealing groove is arranged around the first vent; A second sealing member for sealing the partition and the gas nozzle is arranged inside the sealing groove.

6. The air pipe for an air pump according to claim 4, characterized in that: The joint assembly also includes a third joint, which is arranged between the tube body, the first joint and the second joint, and the third joint is in contact with the first joint. The first sealing member is sleeved on the third joint, and the tube body is sleeved on the outside of the third joint. The third joint is provided with a second air vent, and the second air vent is connected with the first air vent. The tube body is connected with the air nozzle through the first air vent and the second air vent.

7. The air pipe for an air pump according to claim 6, characterized in that: A second convex ring is disposed on the surface of the partition portion facing the second end, and the second convex ring is disposed around the first vent; The second vent includes a first section and a second section, the inner diameter of the first section is larger than the inner diameter of the second section, the first section is closer to the partition than the second section, the inner wall of the first section is in contact with the outer circumferential surface of the second convex ring, and the inner diameter of the second section is not smaller than the first vent.

8. The air pipe for an air pump according to claim 6, characterized in that: A third convex ring protrudes from the outer peripheral surface of the third joint, and a surface of the third convex ring facing away from the partition portion contacts a surface of the first joint facing the partition portion; There is a gap between the inner wall of the first joint and the tube body, and the third joint is located inside the first joint.

9. The air pipe for an air pump according to claim 8, characterized in that: There is a gap between the third convex ring and the inner wall of the second joint, the first sealing member is sleeved on the third joint and located between the partition and the third convex ring, and the inner diameter of the first sealing member is smaller than the outer diameter of the third convex ring.

10. The air pipe for an air pump according to claim 1, characterized in that: A portion of the joint assembly is located on the inner side of the second joint, and another portion of the joint assembly exceeds the second end. A fourth convex ring is provided on the outer circumference of the portion of the joint assembly exceeding the second end. The outer circumference of the fourth convex ring exceeds the inner wall of the second joint, and the fourth convex ring overlaps the second end.

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