Air nozzle structure of an air pump

Abstract

A nozzle structure of an air pump comprises a nozzle body, which is a cylindrical structure with a through hole in the axial direction, a valve core having an inserting section connected to the through hole of the nozzle body, the inserting section having an external thread, an outer peripheral surface of the nozzle body having an inclined guide groove connected to the through hole, a bayonet pin movable up and down is arranged in the inclined guide groove, a bayonet pin retaining ring is arranged in the inclined guide groove and above the rear side of the bayonet pin, a convex ring is arranged at the rear end of the outer periphery of the nozzle body, a spring is supported between the convex ring and the bayonet pin retaining ring, so that the bayonet pin has a tendency to always move forward and downward to lock against the external thread of the valve core, and a handle sleeve is arranged on the outer sleeve of the nozzle body, and when the handle sleeve is pulled backward, the bayonet pin can be driven to move backward, so that the bayonet pin moves backward and outward along the inclined guide groove and is separated from the valve core. The invention has a simple and reasonable structure, is convenient and quick to use, and has good sealing performance and a firm and stable connection.

Description

Technical Field

[0001] The invention belongs to the technical field of inflation equipment and relates to an inflation pump, and in particular to an air nozzle structure of the inflation pump. Background Art

[0002] The air pump is also called an air pump, an air pump, or an inflator. It works by running a motor and is a kind of inflation tool. The working principle of the air pump is that when the motor is running and the air is pumped out, the valve of the communicating device is opened by the air pressure of the atmosphere, and the gas enters the cylinder. When the tire is inflated, the valve is closed by the air pressure in the cylinder, and the gas enters the tire. The application field of the air pump is very wide, involving automobiles, motorcycles, bicycles, leather balls, rubber boats, etc.

[0003] In order to achieve the connection between the air pump and the inflated object such as the tire, an air nozzle is usually provided at the end of the air pipe of the air pump. When in use, the air nozzle is sealed and connected to the inflated object such as the tire, so that the gas in the air pump enters the inflated object such as the tire, thereby realizing the inflation function.

[0004] The air nozzle of a conventional air pump is generally fixed to the valve core of a tire by a threaded connection, which requires multiple rotations during connection, making it very inconvenient to use.

[0005] Upon investigation, the existing Chinese patent number CN201310579560.2, "A Nozzle for an Air Pump", includes a nozzle body and an air outlet arranged on the nozzle body, and an extrusion block connected to the nozzle body is arranged at the air outlet. When in use, the extrusion block squeezes the air core in the inflated object to open the valve port of the inflated object, and then the gas in the air pump enters the inflated object through the nozzle. The nozzle improves the inflation efficiency of the nozzle of the air pump by setting the extrusion block, but does not improve the connection between the nozzle and the valve core of the tire.

[0006] Therefore, it is necessary to improve the air nozzle structure of the traditional air pump so that it is more convenient and quick to connect with the inflated object such as the tire. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an air nozzle structure of an air pump which has a simple and reasonable structure and is easy to use in view of the above technical status quo.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: an air nozzle structure of an air pump, including an air nozzle body, the rear end of the air nozzle body is connected to the air pipe of the air pump through an air nozzle joint, and the front end of the air nozzle body is connected to the valve core, characterized in that: the air nozzle body is a cylindrical structure with a through hole axially opened, the valve core has a plug-in section that is directly connected to the through hole of the air nozzle body, the plug-in section has an external thread, and an inclined guide groove connected to the through hole is opened on the front of the outer circumferential surface of the air nozzle body, and the inclined guide groove is connected to the through hole. The groove is inclined inward and forward, and a bayonet pin that can move up and down is provided in the inclined guide groove. A bayonet pin retaining ring is provided in the inclined guide groove and on the rear side of the bayonet pin. A convex ring is provided at the rear end of the outer periphery of the air nozzle body, and a spring is supported between the convex ring and the bayonet pin retaining ring, so that the bayonet pin has a tendency to always move forward and inward to lock with the external thread of the valve core. A handle sleeve is provided on the outer sleeve of the air nozzle body to cooperate with the bayonet pin. When the handle sleeve is pulled backward, the bayonet pin can be driven to move backward, thereby causing the bayonet pin to move backward and outward along the inclined guide groove and disengage from the lock with the valve core.

[0009] Furthermore, the inclined guide groove is opened on the valve body near the front end, and the inclined guide groove is a plurality of guide grooves evenly distributed on the circumference, and the bayonet is a corresponding plurality of pins, which can move up and down along the inclined guide groove, and the bottom of the bayonet is formed with a rectangular cross-section locking block that cooperates with the external thread of the plug-in section of the valve core.

[0010] Preferably, the slope guide grooves are symmetrically arranged in two upper and lower parts.

[0011] Further improvement, the through hole of the gas nozzle body is a stepped hole with a reduced diameter at the rear end, the gas nozzle joint is a hollow cylindrical structure with a certain elasticity, and the gas nozzle joint is divided into three sections with diameters from small to large, wherein the first section is a plug-in portion fixed to the air pipe, the second section is arranged in the reduced diameter inner hole at the rear end of the gas nozzle body, the third section is penetrated through the middle and rear part of the through hole and is limited by the rear end step surface of the through hole, and a joint sealing ring is lined between the outer peripheral surface of the gas nozzle joint and the through hole.

[0012] Furthermore, the first section of the head of the air nozzle connector is formed into an inverted cone structure for easy plug-in, and a connector locking ring is sleeved on the outside of the air pipe at a position corresponding to the plug-in position of the air nozzle connector. The end face of the connector locking ring is flush with the front end face of the air pipe, and the outer diameter of the connector locking ring is consistent with the convex ring at the rear end of the air nozzle body.

[0013] Furthermore, the convex rings at the rear end of the air nozzle body are two arranged side by side, wherein the convex ring on the rear side is integrated with the rear end surface of the air nozzle body; after the air nozzle body is connected to the air pipe, the convex ring on the rear side abuts against the joint locking ring, and the spring sleeve is arranged outside the air nozzle body and supported between the convex ring on the front side and the bayonet retaining ring.

[0014] Furthermore, the front end of the handle cover is formed with a reduced diameter convex edge that cooperates with the front end outer wall of the air nozzle body, and the front end outer wall of the air nozzle body is circumferentially concave with an annular groove for inserting a wire retaining spring, and an annular limiting groove that cooperates with the wire retaining spring is provided on the inner wall of the reduced diameter convex edge of the handle cover. When the handle cover is pushed forward, the limiting groove cooperates with the wire retaining spring to prevent it from falling out.

[0015] Finally, the handle sleeve is a circular sleeve structure that is wide at both ends and narrow in the middle for easy hand gripping, and concave ribs are formed at intervals on the outer surface of the handle sleeve for easy hand pulling.

[0016] Compared with the prior art, the advantages of the present invention are: it changes the threaded connection method between the traditional air pump nozzle and the valve core, adopts a straight plug-in connection, which greatly facilitates use; when inserted, the bayonet pin is locked and fixed with the external thread of the valve core, and when it needs to be pulled out, just pull the handle sleeve backwards to separate the bayonet pin from the valve core, which is convenient for pulling out. The present invention has a simple and reasonable structure, is easy and quick to use, has good sealing performance, and has a firm and stable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural decomposition diagram of an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of an embodiment of the present invention before the valve core is inserted;

[0019] Figure 3 It is a structural schematic diagram of an embodiment of the present invention when inserting a valve core;

[0020] Figure 4 It is a schematic diagram of the structure of the embodiment of the present invention after the valve core is inserted;

[0021] Figure 5 It is a schematic diagram of the structure of the embodiment of the present invention when the handle sleeve is pulled backwards;

[0022] Figure 6 It is a schematic structural diagram of an embodiment of the present invention when the valve core is pulled out. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 6As shown, a nozzle structure of an air pump comprises a nozzle body 1, a nozzle connector 2 and a handle cover 3. The nozzle body 1 is a cylindrical structure with a through hole 15 axially opened. The nozzle connector 2 is inserted into the through hole 15. The rear end of the nozzle body 1 is connected to the air pipe 10 of the air pump through the nozzle connector 2. The front end of the nozzle body 1 is directly connected to the valve core 20. The valve core 20 has a plug-in section 201 that is directly connected to the through hole 15 of the nozzle body 1. The plug-in section 201 has an external thread. The upper and lower sides of the outer circumferential surface of the nozzle body 1 are symmetrically opened to the through hole 15. The inclined guide groove 11 is a guide groove inclined inward and forward. A bayonet 4 that can move up and down is provided in the inclined guide groove 11. The bottom of the bayonet 4 is formed with a rectangular cross-section locking block that matches the external thread of the plug-in section 201 of the valve core 20. A bayonet retaining ring 6 is provided in the inclined guide groove 11 and on the rear side of the bayonet 4. Two convex rings 12 and 13 are provided on the outer periphery of the air nozzle body 1. A spring 5 is supported between the convex ring 13 and the bayonet retaining ring 6, so that the bayonet 4 has a tendency to always move forward and inward to lock against the external thread of the valve core 20. The handle cover 3 is sleeved on the outside of the air nozzle body 1. When the handle cover 3 is pulled backward, the bayonet 4 is forced to overcome the elastic force of the spring 5 through the bayonet retaining ring 6 and move backward and outward, while driving the air nozzle body 1 to move backward, thereby disengaging from the valve core 20.

[0025] The through hole 15 of the air nozzle body 1 is a stepped hole with a reduced diameter at the rear end. The air nozzle joint 2 is a hollow cylindrical structure with a certain elasticity. The air nozzle joint 2 is divided into three sections with diameters from small to large, wherein the first section 21 is a plug-in portion plugged and fixed with the air pipe 10, the second section 22 is arranged in the reduced diameter inner hole at the rear end of the air nozzle body 1, the third section 23 is penetrated in the middle and rear part of the through hole 15 and is limited by the rear end step surface of the through hole 15, and a joint sealing ring 7 is lined between the outer peripheral surface of the air nozzle joint 2 and the inner wall of the through hole 15. The head of the first section 21 of the gas valve joint 2 is formed as an inverted cone structure for easy plug-in. A joint locking ring 9 is sleeved on the outside of the air pipe 10, corresponding to the position where the gas valve joint 2 is plugged in. The end face of the joint locking ring 9 is flush with the front end face of the air pipe 10. The outer diameter of the joint locking ring 9 is consistent with the convex ring 12 at the rear end of the gas valve body 1. The convex ring 12 on the rear side is integrated with the rear end face of the gas valve body 1. After the gas valve body 1 is connected to the air pipe 10, the convex ring 12 on the rear side just abuts against the joint locking ring 9. The spring 5 is sleeved outside the gas valve body 1, supported between the convex ring 13 on the front side and the bayonet retaining ring 6. The handle cover 3 is a circular sleeve structure with wide ends and narrow middle for easy hand grip. Concave ribs are formed at intervals on the outer surface of the handle cover 3 for easy hand pulling. The handle cover 3 is sleeved outside the gas nozzle body 1 and the joint locking ring 9. A reduced diameter convex edge is formed at the front opening of the handle cover 3 to cooperate with the front outer wall of the gas nozzle body 1. An annular groove 14 is formed on the front outer wall of the gas nozzle body 1 to accommodate the steel wire retaining spring 8. An annular limiting groove 31 is provided on the inner wall of the reduced diameter convex edge of the handle cover 3 to cooperate with the steel wire retaining spring 8 to prevent the handle cover 3 from coming out. When the handle cover 3 is pulled back, the reduced diameter convex edge of the handle cover 3 presses the bayonet pin 4 and the bayonet pin retaining ring 6 to retreat, so that they can overcome the elastic force of the spring 5, and the bayonet pin 4 moves backward and outward along the inclined guide groove 11, and is locked with the external thread of the valve core 20. At the same time, the handle cover 3 drives the gas nozzle body 1 to retreat through the bayonet pin 4, so that the valve core 20 and the gas nozzle body 1 are separated.

[0026] During assembly, the plug-in section 201 of the valve core 20 is aligned with the front opening 11 of the valve body 1 and inserted (eg Figure 2 ), the spring 5 is squeezed and moves backward, the bayonet 4 is opened, the bayonet 4 is squeezed by the valve core 20 and moves upward, and the valve core 20 is inserted (such as Figure 3 ), the bayonet pin 4 is engaged in the external thread of the valve core 20 under the action of the spring 5, locking the valve core 20 (such as Figure 4 ); The whole process does not require multiple rotations, and the assembly is quick and convenient.

[0027] When the valve core 20 needs to be pulled out, Figure 5 , 6As shown, the handle cover 3 is pulled backward, and the reduced diameter convex edge of the handle cover 3 presses the bayonet pin 4 and the bayonet pin retaining ring 6 backward, so that they overcome the elastic force of the spring 5, and the bayonet pin 4 moves backward and outward along the inclined guide groove 11, and the bayonet pin 4 retreats and opens, disengaging from the lock with the external thread of the valve core 20. At the same time, the handle cover 3 drives the air nozzle body 1 backward through the bayonet pin 4, so that the valve core 20 and the air nozzle body 1 are separated, and the valve core 20 can be easily pulled out.

[0028] This embodiment describes in detail the example of the inclined guide grooves being arranged symmetrically in two upper and lower parts. Of course, the inclined guide grooves can also be multiple guide grooves evenly distributed around the circumference, and the bayonet pins are multiple corresponding ones. The principle is similar.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air nozzle structure of an air pump, comprising an air nozzle body, the rear end of the air nozzle body is connected to the air pipe of the air pump through an air nozzle joint, and the front end of the air nozzle body is connected to the valve core, characterized in that: The air nozzle body is a cylindrical structure with a through hole axially opened, the valve core has an inserting section that is directly plugged and connected to the through hole of the air nozzle body, the inserting section has an external thread, and an inclined guide groove connected to the through hole is opened on the front of the outer peripheral surface of the air nozzle body, the inclined guide groove is inclined inward and forward, a bayonet pin that can move up and down is arranged in the inclined guide groove, a bayonet pin retaining ring is arranged in the inclined guide groove and on the rear side of the bayonet pin, a convex ring is arranged at the rear end of the outer periphery of the air nozzle body, a spring is supported between the convex ring and the bayonet pin retaining ring, so that the bayonet pin has a tendency to always move forward and inward to lock against the external thread of the valve core, a handle sleeve is arranged on the outer sleeve of the air nozzle body to cooperate with the bayonet pin, and when the handle sleeve is pulled backward, the bayonet pin can be driven to move backward, so that the bayonet pin moves backward and outward along the inclined guide groove and is released from the lock of the valve core; The through hole of the gas nozzle body is a stepped hole with a reduced diameter at the rear end, and the gas nozzle joint is a hollow cylindrical structure with a certain elasticity. The gas nozzle joint is divided into three sections with diameters from small to large, wherein the first section is a plug-in portion plugged and fixed with the air pipe, the second section is arranged in the reduced diameter inner hole at the rear end of the gas nozzle body, and the third section is inserted in the middle and rear part of the through hole and is limited by the rear end step surface of the through hole, and a joint sealing ring is lined between the outer peripheral surface of the gas nozzle joint and the through hole; The first section of the head of the air nozzle connector is formed as an inverted cone structure for easy plug-in. A connector locking ring is sleeved on the outside of the air pipe at a position corresponding to the plug-in position of the air nozzle connector. The end face of the connector locking ring is flush with the front end face of the air pipe, and the outer diameter of the connector locking ring is consistent with the convex ring at the rear end of the air nozzle body.

2. The air nozzle structure according to claim 1, characterized in that: The inclined guide groove is opened on the valve body near the front end. The inclined guide groove is a plurality of guide grooves evenly distributed on the circumference. The bayonet pin is a corresponding plurality of guide grooves. The bayonet pin can move up and down along the inclined guide groove. The bottom of the bayonet pin is formed with a rectangular cross-section locking block that cooperates with the external thread of the plug-in section of the valve core.

3. The air nozzle structure according to claim 2, characterized in that: The slope guide grooves are arranged symmetrically in two upper and lower parts.

4. The air nozzle structure according to claim 1, characterized in that: The convex rings at the rear end of the air nozzle body are two arranged side by side, wherein the convex ring on the rear side is integrated with the rear end surface of the air nozzle body. After the air nozzle body is connected to the air pipe, the convex ring on the rear side abuts against the joint locking ring, and the spring sleeve is arranged outside the air nozzle body and supported between the convex ring on the front side and the bayonet retaining ring.

5. The air nozzle structure according to any one of claims 1 to 4, characterized in that: The front end of the handle sleeve is formed with a reduced diameter convex edge that cooperates with the front end outer wall of the air nozzle body. The front end outer wall of the air nozzle body is circumferentially concave with an annular groove for inserting a wire retaining spring. An annular limiting groove that cooperates with the wire retaining spring is provided on the inner wall of the reduced diameter convex edge of the handle sleeve. When the handle sleeve is pushed forward, the limiting groove cooperates with the wire retaining spring to prevent it from falling out.

6. The air nozzle structure according to any one of claims 1 to 4, characterized in that: The handle sleeve is a circular sleeve structure that is wide at both ends and narrow in the middle for easy hand gripping. Concave ribs are formed at intervals on the outer surface of the handle sleeve for easy hand pulling.

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