Inflation nozzle with pressure reduction function

Abstract

The utility model belongs to the technical field of inflating tools, and discloses an inflating nozzle with a pressure reducing function, which comprises a main body, a middle body, a rear seat and an air outlet nozzle, the main body, the middle body and the rear seat are sequentially connected, an air inlet joint is arranged in the main body, a valve column is arranged in the middle body, an air outlet connecting rod is arranged in the rear seat, and the air outlet nozzle is mounted on the air outlet connecting rod. A cylinder protruding towards the main body is arranged on the valve column, an air inlet channel is formed in the air inlet connector, a center boss is arranged on the valve column and located in the cylinder, and a plurality of annularly-distributed air holes are formed in the outer ring of the center boss. The center boss is used for blocking the air inlet channel when the pressure of the pressure cavity is larger than a set value and the decompression spring is compressed. The inflation nozzle with the pressure reduction function can automatically control the valve post displacement according to the pressure of the pressure cavity after inflation so as to control the blocking degree of the air inlet channel, so that the inflation pressure is automatically adjusted, and the overcharge condition of an inflation product is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of inflation tools, in particular to an inflation nozzle with a self-decompression function. Background Art

[0002] Inflating is common in everyday life, often seen in children's toy balls, fitness balls, promotional balloons, and other inflatable products. For example, traditional inflator nozzles often suffer from unstable pressure, easy damage, and rupture due to excessive pressure. Therefore, it is desirable for nozzles to have a pressure relief function that automatically adjusts the inflation pressure, ensuring sufficient air flow in the balloon while preventing damage from excessive pressure, thus meeting practical needs. Utility Model Content

[0003] Based on the above problems, the purpose of the present invention is to provide an inflation nozzle with a built-in decompression function, optimize the internal structure of the inflation nozzle, and realize the decompression function.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An inflation nozzle with a self-decompression function comprises a main body, an intermediate body, a rear seat and an air outlet nozzle, wherein the main body, the intermediate body and the rear seat are connected in sequence, an air inlet joint is provided in the main body, a valve column is provided in the intermediate body, an air outlet connecting rod is provided in the rear seat, and the air outlet nozzle is mounted on the air outlet connecting rod;

[0006] A cylinder protruding toward the main body is provided on the valve column, the outlet end of the air inlet joint extends into the cylinder, and the outer wall of the outlet end of the air inlet joint is sealed with the inner wall of the cylinder by a first sealing ring, and the outer edge of the valve column is sealed with the inner wall of the intermediate body by a second sealing ring. A pressure reducing spring sleeved on the outside of the cylinder is provided between the valve column and the main body, a pressure chamber is formed in the intermediate body and on the side of the valve column facing the rear seat, an air inlet channel is provided inside the air inlet joint, a central boss is provided on the valve column and inside the cylinder, a plurality of annularly distributed air holes are provided on the outer ring of the central boss, and the central boss is used to block the air inlet channel when the pressure in the pressure chamber is greater than a set value and the pressure reducing spring is compressed;

[0007] A sealed cavity connected to the pressure cavity is provided inside the rear seat, and an air outlet channel connected to the air outlet nozzle and a radial air channel connected to the air outlet channel are provided on the air outlet connecting rod. The air outlet connecting rod can move axially relative to the rear seat, thereby controlling whether the radial air channel is connected to the sealed cavity or not.

[0008] As an optional solution, the outer wall of the rear seat is provided with a concave cavity for embedding the intermediate body, and a pressure relief hole communicating with the outside is provided on the side wall of the concave cavity. The part of the intermediate body embedded in the concave cavity is provided with a bursting disc. When the pressure in the pressure chamber reaches the limit value, the diaphragm of the bursting disc ruptures, and the pressure chamber is connected to the pressure relief hole.

[0009] As an optional solution, a threaded column passing through the end face of the intermediate body and the bursting disc is provided on the rear seat, a locking nut cooperating with the threaded column is provided inside the intermediate body, and a docking channel is provided inside the threaded column, which respectively connects the pressure chamber and the sealing chamber.

[0010] As an optional solution, nylon gaskets are respectively provided on the inner and outer surfaces of the bursting disc, and a third sealing ring is provided between the bursting disc and the threaded column, and a fourth sealing ring is provided between the intermediate body and the rear seat.

[0011] As an optional solution, a ball head protrusion is provided at the outlet end of the air inlet joint, the air inlet channel extends to the ball head protrusion, and a rubber block is provided on the surface of the center boss. When the pressure in the pressure chamber is greater than the set value and the pressure reducing spring is compressed, the rubber block is in sealing contact with the ball head protrusion.

[0012] As an optional solution, a limiting step is provided on the inner wall of the intermediate body, which is used to limit the displacement of the valve column under the action of the pressure reducing spring. When the valve column abuts against the limiting step, the rubber block does not contact the ball head protrusion, and the air intake channel and the air vent are completely unobstructed.

[0013] As an optional solution, the air inlet connector is threadedly connected to the inner wall of the main body, the first end of the main body is provided with an interface cavity for connecting to the air source, and the air inlet end of the air inlet connector is located in the interface cavity.

[0014] As an optional solution, the second end of the main body is threadedly connected to the intermediate body, and the main body, intermediate body, valve column and air intake connector form a accommodating chamber for installing the pressure reducing spring. A through hole is provided on the intermediate body to connect the accommodating chamber with the outside world.

[0015] As an optional solution, a cover is provided on the rear seat, which closes the inner cavity of the rear seat to form a sealed cavity. A convex ring is provided on the outer wall of the air outlet connecting rod, and a return spring is provided between the convex ring and the cover. When the air outlet nozzle is driven to drive the air outlet connecting rod to compress the return spring, the radial air channel is located in the sealed cavity, and the air outlet channel is connected to the sealed cavity; when the air outlet connecting rod is acted upon by the return spring and the convex ring abuts against the inner wall of the rear seat, the radial air channel is located outside the sealed cavity, and the air outlet channel is blocked from the sealed cavity.

[0016] As an optional solution, when the convex ring abuts against the inner wall of the rear seat, the radial air passage retreats into the side wall of the rear seat, and a fifth sealing ring is provided on the air outlet connecting rod and on both sides of the radial air passage to seal with the side wall of the rear seat.

[0017] The beneficial effects of the utility model are as follows: the inflation nozzle with its own decompression function can automatically control the displacement of the valve column according to the pressure of the pressure chamber after inflation, and then control the degree of blocking of the air inlet channel, thereby automatically adjusting the inflation pressure, effectively avoiding overfilling of the inflatable product, improving the safety and convenience of the use of the inflation nozzle, having strong versatility and good inflation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an inflation nozzle with a self-decompression function provided by an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 It is a schematic structural diagram of the intermediate involved in the embodiment of the present utility model;

[0021] Figure 4 It is a structural schematic diagram of the rear seat involved in an embodiment of the present utility model.

[0022] In the attached figure:

[0023] 1. Main body; 11. Interface cavity; 12. Accommodation cavity;

[0024] 2. Intermediate body; 21. Pressure chamber; 22. Bursting disc; 23. Limiting step; 24. Through hole;

[0025] 3. Rear seat; 31. Sealed cavity; 32. Concave cavity; 33. Pressure relief hole; 34. Threaded column; 35. Lock nut; 36. Docking channel;

[0026] 4. Vent nozzle;

[0027] 5. Intake connector; 51. Intake channel; 52. Ball head protrusion;

[0028] 6. Valve column; 61. Cylinder; 62. Center boss; 63. Air vent; 64. Rubber block;

[0029] 7. Air outlet connecting rod; 71. Air outlet channel; 72. Radial air channel; 73. Protruding ring;

[0030] 8. First sealing ring;

[0031] 9. Second sealing ring;

[0032] 10. Decompression spring;

[0033] 20. Nylon gasket;

[0034] 30. The third sealing ring;

[0035] 40. Fourth sealing ring;

[0036] 50. Cover;

[0037] 60. Return spring;

[0038] 70. Fifth sealing ring. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0040] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] See also Figures 1 to 4As shown, this preferred embodiment provides an inflation nozzle with a built-in decompression function, including a main body 1, an intermediate body 2, a rear seat 3 and an air outlet nozzle 4. The main body 1, the intermediate body 2 and the rear seat 3 are connected in sequence. An air inlet connector 5 is provided in the main body 1, a valve column 6 is provided in the intermediate body 2, an air outlet connecting rod 7 is provided in the rear seat 3, and the air outlet nozzle 4 is installed on the air outlet connecting rod 7.

[0044] In particular, the valve column 6 is provided with a cylinder 61 protruding toward the main body 1, the air outlet end of the air inlet joint 5 extends into the cylinder 61, and the outer wall of the air outlet end of the air inlet joint 5 is sealed with the inner wall of the cylinder 61 by a first sealing ring 8, and the outer edge of the valve column 6 is sealed with the inner wall of the intermediate body 2 by a second sealing ring 9. A pressure reducing spring 10 is provided between the valve column 6 and the main body 1 and is sleeved on the outside of the cylinder 61. A pressure chamber 21 is formed in the intermediate body 2 and on the side of the valve column 6 facing the rear seat 3. An air inlet channel 51 is provided inside the air inlet joint 5, and a center boss 62 is provided on the valve column 6 and inside the cylinder 61. The outer ring of the center boss 62 is provided with a plurality of annularly distributed air holes 63. The center boss 62 is used to block the air inlet channel 51 when the pressure in the pressure chamber 21 is greater than the set value and compresses the pressure reducing spring 10.

[0045] A sealed chamber 31 communicating with the pressure chamber 21 is provided inside the rear seat 3, and an air outlet channel 71 communicating with the air outlet nozzle 4 and a radial air channel 72 communicating with the air outlet channel 71 are provided on the air outlet connecting rod 7. The air outlet connecting rod 7 can move axially relative to the rear seat 3, thereby controlling whether the radial air channel 72 is connected to the sealed chamber 31 or not.

[0046] Thus, the displacement of the valve column 6 can be automatically controlled according to the pressure of the pressure chamber 21 after inflation, thereby controlling the degree of blocking of the air inlet channel 51, thereby automatically adjusting the inflation pressure and effectively avoiding over-inflation of the inflatable product.

[0047] Optionally, the outer wall of the rear seat 3 is provided with a concave cavity 32 for embedding the intermediate body 2, and a pressure relief hole 33 communicating with the outside is provided on the side wall of the concave cavity 32. The portion of the intermediate body 2 embedded in the concave cavity 32 is provided with a bursting disc 22. When the pressure in the pressure chamber 21 reaches the limit value, the diaphragm of the bursting disc 22 ruptures, and the pressure chamber 21 is connected to the pressure relief hole 33, thereby realizing the pressure relief function, ensuring the safe use of the inflation nozzle, and avoiding damage to the inflatable product.

[0048] Specifically, rear seat 3 is provided with a threaded post 34 that passes through the end surface of intermediate body 2 and bursting disc 22. A locknut 35 is provided within intermediate body 2, engaging with threaded post 34. A docking passage 36 is provided within threaded post 34, connecting pressure chamber 21 and sealing chamber 31, respectively. The threaded post 34 engages with locknut 35 to ensure a secure connection between intermediate body 2 and rear seat 3. The bursting disc 22 herein is conventional and will not be described further.

[0049] Furthermore, nylon gaskets 20 are installed on the inner and outer surfaces of the bursting disc 22, respectively. A third sealing ring 30 is installed between the bursting disc 22 and the threaded column 34, and a fourth sealing ring 40 is installed between the intermediate body 2 and the rear seat 3. The nylon gasket 20 has excellent wear and corrosion resistance, maintaining stability and durability under extreme temperature conditions, ensuring the functionality of the bursting disc 22. The third and fourth sealing rings 30 and 40 ensure the sealing of the pressure chamber 21 under normal conditions.

[0050] Optionally, a spherical protrusion 52 is provided at the outlet end of the inlet connector 5, and the inlet passage 51 extends onto the spherical protrusion 52. A rubber block 64 is provided on the surface of the central boss 62. When the pressure in the pressure chamber 21 exceeds a set value and compresses the pressure-reducing spring 10, the rubber block 64 seals against the spherical protrusion 52. The combination of the spherical protrusion 52 and the rubber block 64 improves the sealing effect on the inlet passage 51, allowing the amount of air entering the inlet passage 51 to gradually change during pressure changes. Compared to a flat seal, this prevents abrupt air shutoff or air intake, thereby improving the stability of the inflation process.

[0051] Furthermore, a limiting step 23 is provided on the inner wall of the intermediate body 2, and the limiting step 23 is used to limit the displacement of the valve column 6 under the action of the pressure reducing spring 10. When the valve column 6 abuts against the limiting step 23, the rubber block 64 does not contact the ball head protrusion 52, and the air inlet channel 51 and the air vent 63 are completely unobstructed.

[0052] Optionally, the air inlet connector 5 is threadedly connected to the inner wall of the main body 1 , and the first end of the main body 1 is provided with an interface cavity 11 for connecting to an air source, and the air inlet end of the air inlet connector 5 is located in the interface cavity 11 .

[0053] Optionally, the second end of the main body 1 is threadedly connected to the intermediate body 2. The main body 1, intermediate body 2, valve post 6, and air inlet connector 5 enclose a receiving chamber 12 for mounting the pressure relief spring 10. The intermediate body 2 is provided with a through hole 24 that connects the receiving chamber 12 to the outside world. The communication between the receiving chamber 12 and the outside world ensures that there is no air pressure interference on the side corresponding to the movement of the valve post 6.

[0054] Optionally, a cover 50 is provided on the rear seat 3, which closes the inner cavity of the rear seat 3 to form a sealed cavity 31, and the cover 50 makes the assembly of the air outlet connecting rod 7 and the rear seat 3 more convenient; a convex ring 73 is provided on the outer wall of the air outlet connecting rod 7, and a return spring 60 is provided between the convex ring 73 and the cover 50. When the air outlet nozzle 4 is driven to drive the air outlet connecting rod 7 to compress the return spring 60, the radial air channel 72 is located in the sealed cavity 31, and the air outlet channel 71 is connected to the sealed cavity 31; when the air outlet connecting rod 7 is acted upon by the return spring 60 and the convex ring 73 abuts against the inner wall of the rear seat 3, the radial air channel 72 is located outside the sealed cavity 31, and the air outlet channel 71 is blocked from the sealed cavity 31. Therefore, the function of only being able to discharge air when the air outlet nozzle 4 is pressed is realized by the return spring 60, eliminating the design of an additional switch air valve.

[0055] Furthermore, when the convex ring 73 abuts against the inner wall of the rear seat 3, the radial air passage 72 retreats into the side wall of the rear seat 3. A fifth sealing ring 70 is provided on the air outlet connecting rod 7 and on both sides of the radial air passage 72 to seal with the side wall of the rear seat 3, thereby ensuring the sealing of the air outlet passage 71.

[0056] In addition, the main body 1, the intermediate body 2, the rear seat 3, the air inlet joint 5, the valve column 6, the air outlet connecting rod 7 and the cover 50 are all made of high-quality brass, which has good corrosion resistance, high strength, wear resistance, stability and durability.

[0057] When in use, connect the interface cavity 11 of the main body 1 to the air source, connect the inflation port of the inflatable product to the air outlet nozzle 4, and press the air outlet nozzle 4. The air outlet nozzle 4 drives the air outlet connecting rod 7 to compress the return spring 60. The air outlet channel 71 of the air outlet connecting rod 7 is connected to the air inlet channel 51 through the pressure chamber 21 and the air vent 63 in turn to achieve inflation.

[0058] During the inflation process, the pressure in the pressure chamber 21 will control the movement of the valve column 6 relative to the air inlet connector 5, thereby regulating the air intake volume of the air inlet channel 51 to keep the inflation within a safe and reasonable range; when the pressure in the pressure chamber 21 (i.e., the internal pressure of the inflatable product) reaches the set value, the central boss 62 of the valve column 6 will partially block or completely block the air inlet channel 51 to prevent overfilling and damage to the inflatable product; when the pressure in the pressure chamber 21 drops to a certain level, the air inlet channel 51 will be partially unobstructed or completely unobstructed to ensure that the inflatable product maintains a sufficient amount of gas; under abnormal circumstances, when the pressure in the pressure chamber 21 reaches the limit value, the bursting disc 22 on the intermediate body 2 will rupture, and the high pressure in the pressure chamber 21 will be discharged through the pressure relief hole 33 to ensure the safety of the inflation nozzle.

[0059] In summary, the inflation nozzle with built-in decompression function has the following advantages:

[0060] 1) Improved safety, effectively preventing inflatable products from bursting and being damaged due to over-inflation, and ensuring the personal safety of users;

[0061] 2) Extended service life, stable air pressure reduces damage to inflatable products and inflation nozzles;

[0062] 3) Easy to use, the method of use is the same as that of a traditional inflation nozzle, and the function of automatically reducing the inflation pressure can be achieved without additional operation;

[0063] 4) It has strong versatility and is suitable for inflatable products of various types and sizes, and has broad application prospects.

[0064] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The inflation nozzle with built-in decompression function is characterized by: The invention comprises a main body (1), an intermediate body (2), a rear seat (3) and an air outlet nozzle (4); the main body (1), the intermediate body (2) and the rear seat (3) are connected in sequence; an air inlet joint (5) is provided in the main body (1); a valve column (6) is provided in the intermediate body (2); an air outlet connecting rod (7) is provided in the rear seat (3); and the air outlet nozzle (4) is mounted on the air outlet connecting rod (7); The valve column (6) is provided with a cylinder (61) protruding toward the main body (1), the outlet end of the air inlet connector (5) extends into the cylinder (61), and the outer wall of the outlet end of the air inlet connector (5) and the inner wall of the cylinder (61) are sealed by a first sealing ring (8), the outer edge of the valve column (6) and the inner wall of the intermediate body (2) are sealed by a second sealing ring (9), a pressure reducing spring (10) sleeved on the outside of the cylinder (61) is provided between the valve column (6) and the main body (1), and the intermediate body (2) and located on the side of the valve column (6) facing the rear seat (3) to form a pressure chamber (21), the air intake joint (5) is provided with an air intake channel (51) inside, the valve column (6) and located inside the cylinder (61) is provided with a central boss (62), the outer ring of the central boss (62) is provided with a plurality of annularly distributed air holes (63), the central boss (62) is used to block the air intake channel (51) when the pressure in the pressure chamber (21) is greater than a set value and compresses the pressure reducing spring (10); The interior of the rear seat (3) is provided with a sealed cavity (31) communicating with the pressure cavity (21); the air outlet connecting rod (7) is provided with an air outlet channel (71) communicating with the air outlet nozzle (4) and a radial air channel (72) communicating with the air outlet channel (71); the air outlet connecting rod (7) can move axially relative to the rear seat (3), thereby controlling whether the radial air channel (72) is connected to or not connected with the sealed cavity (31).

2. The inflation nozzle with self-decompression function according to claim 1, characterized in that: The outer wall of the rear seat (3) is provided with a concave cavity (32) for embedding the intermediate body (2), and a pressure relief hole (33) communicating with the outside is provided on the side wall of the concave cavity (32). The portion of the intermediate body (2) embedded in the concave cavity (32) is provided with a bursting disc (22). When the pressure of the pressure chamber (21) reaches a limit value, the diaphragm of the bursting disc (22) ruptures, and the pressure chamber (21) is communicated with the pressure relief hole (33).

3. The inflation nozzle with self-decompression function according to claim 2, characterized in that: The rear seat (3) is provided with a threaded column (34) passing through the end surface of the intermediate body (2) and the bursting disc (22); the interior of the intermediate body (2) is provided with a locking nut (35) cooperating with the threaded column (34); the interior of the threaded column (34) is provided with a docking channel (36); the docking channel (36) is connected to the pressure chamber (21) and the sealing chamber (31) respectively.

4. The inflation nozzle with self-decompression function according to claim 3, characterized in that: Nylon gaskets (20) are respectively provided on the inner and outer surfaces of the bursting disc (22), a third sealing ring (30) is provided between the bursting disc (22) and the threaded column (34), and a fourth sealing ring (40) is provided between the intermediate body (2) and the rear seat (3).

5. The inflation nozzle with self-decompression function according to claim 1, characterized in that: A ball head protrusion (52) is provided at the air outlet end of the air inlet joint (5), the air inlet channel (51) extends to the ball head protrusion (52), and a rubber block (64) is provided on the surface of the central boss (62). When the pressure of the pressure chamber (21) is greater than a set value and compresses the pressure reducing spring (10), the rubber block (64) is in sealing contact with the ball head protrusion (52).

6. The inflation nozzle with self-decompression function according to claim 5, characterized in that: A limiting step (23) is provided on the inner wall of the intermediate body (2), and the limiting step (23) is used to limit the displacement of the valve column (6) under the action of the pressure reducing spring (10). When the valve column (6) abuts against the limiting step (23), the rubber block (64) does not contact the ball head protrusion (52), and the air inlet channel (51) and the air vent (63) are completely unobstructed.

7. The inflation nozzle with self-decompression function according to claim 1, characterized in that: The air inlet connector (5) is threadedly connected to the inner wall of the main body (1); the first end of the main body (1) is provided with an interface cavity (11) for connecting to an air source; the air inlet end of the air inlet connector (5) is located in the interface cavity (11).

8. The inflation nozzle with self-decompression function according to claim 7, characterized in that: The second end of the main body (1) is threadedly connected to the intermediate body (2); the main body (1), the intermediate body (2), the valve column (6) and the air inlet connector (5) enclose a receiving chamber (12) for installing the pressure reducing spring (10); and a through hole (24) is provided on the intermediate body (2) for communicating the receiving chamber (12) with the outside world.

9. The inflation nozzle with self-decompression function according to claim 1, characterized in that: A cover (50) is provided on the rear seat (3), and the cover (50) closes the inner cavity of the rear seat (3) to form the sealed cavity (31). A convex ring (73) is provided on the outer wall of the air outlet connecting rod (7), and a return spring (60) is provided between the convex ring (73) and the cover (50). When the air outlet nozzle (4) is driven to drive the air outlet connecting rod (7) to compress the return spring (60), the radial air passage (72) is located in the sealed cavity (31), and the air outlet passage (71) is communicated with the sealed cavity (31); when the air outlet connecting rod (7) is acted upon by the return spring (60) and the convex ring (73) abuts against the inner wall of the rear seat (3), the radial air passage (72) is located outside the sealed cavity (31), and the air outlet passage (71) is blocked from the sealed cavity (31).

10. The inflation nozzle with self-decompression function according to claim 9, characterized in that: When the convex ring (73) abuts against the inner wall of the rear seat (3), the radial air passage (72) retreats into the side wall of the rear seat (3), and a fifth sealing ring (70) is provided on the air outlet connecting rod (7) and on both sides of the radial air passage (72) to seal with the side wall of the rear seat (3).

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