CN102251947B - Foot pedal mini pump with extension tube set - Google Patents

Abstract

The invention relates to a pedal small inflator with an extension pipe set, which comprises a cylinder set, a pedal and a handle, wherein the cylinder set comprises a first end and a second end; an extension pipe group is of a three-section type and can be completely collected in the cylinder group, the extension pipe group comprises a first air pipe, a second air pipe and a third air pipe, the first air pipe can be collected in the second air pipe, the first air pipe can also be collected in the cylinder group, the first air pipe can stretch out of the second air pipe, the second air pipe can be completely collected in the cylinder group, the second air pipe can also stretch out of the cylinder group, the third air pipe can be collected in the second air pipe, the third air pipe can also be collected in the cylinder group, one end, far away from the first air pipe, of the third air pipe is connected with a nozzle head, and the nozzle head can be combined with an object to be inflated.

Description

Foot pedal mini pump with extension tube set

technical field

The present invention mainly discloses a small foot pump, especially a small foot pump with an extension tube set.

Background technique

With the change of life style, people pay more and more attention to the quality of leisure life. Natural environments such as countryside and suburbs have become people's new favorites. Riding bicycles in the suburbs has become a new fashion for modern people, even in the urban jungle. Riding a bicycle can also enjoy the beauty of gentle breeze and exercise. When riding a bicycle, an easy-to-carry pump is an indispensable equipment.

Common pumps on the market are mainly divided into three categories, floor pumps, hand-held pumps and small pedal pumps. The floor-mounted air pump has a large volume and has a large cylinder and can be filled with a large volume, and the floor-mounted air pump allows the user to step on the pedal and use the grip to carry out the gas filling operation. Hand-held air pumps are small in size and easy to carry, but because the cylinder and nozzle head of the air pump need to be held in front and back with two hands when performing air filling operations, so that the air pump can be filled with air, there is no fulcrum in this operation method However, it has the disadvantages that it is not easy to apply force and the gas volume is small. Therefore, the small pump that can be stepped on has the meaning of removing the chaff from the above-mentioned pump, and the small pump that can be stepped on has both the advantages of the above two. The small pump that can be stepped on has a pedal and a handle. The user can perform an effortless inflating operation by stepping on the pedal and operating the handle with both hands, and it is easy to carry with the advantage of small size. However, small pedal pumps have shorter hoses due to their small size. It is inconvenient to use a small pump that can be stepped on.

The applicant has devoted himself to the pump field for many years, and deeply feels that the pump still has a shortcoming that needs to be improved urgently. When the pump is inflated, the nozzle head of the pump will be combined with the nozzle of the object to be inflated. For a small pump that can be stepped on, a hose is connected between the nozzle head and the cylinder. The traditional hose is Single-cut type, so that when the small foot pump is inflated, the distance between the small foot pump and the object to be inflated is limited by the length of the hose, so the small foot pump must be Restricted by the hose and unable to move away from the object to be inflated.

Taking the hand-held air pump as an example, the air nozzle head of the hand-held air pump is located at one end of the cylinder. When the air nozzle head is combined with the air nozzle of the object to be inflated, the cylinder is next to the object to be inflated, so that the user needs to hold the hand-held air pump. The inflator can only complete the filling operation if it is next to the object to be inflated.

Referring to Chinese Patent Application No. 200420068511 "Mini Pump", it discloses a hand-held pump, which includes a large cylinder 10, a small cylinder 20, a connecting rod 30, a holding device 40 and a filling Head 50. The filling head 50 is connected to a hose 59 which can protrude into the connecting rod 30 . When inflating the gas, the user holds the holding device 40 with one hand and the large cylinder 10 with the other hand, and moves relative to the holding device 40 with the help of the large cylinder 10 to achieve the gas filling effect.

The filling head 50 of the mini-pump can be stretched out from the connecting rod by using a hose 59, so that when the user performs the filling operation, the user's hand can avoid being close to the object to be inflated, but this single-section The extension effect provided by the flexible hose 59 is limited, which only solves the shortcoming that the user's hand avoids being close to the object to be inflated. The distance between the objects to be inflated is still too close, so that the user's body must be close to the objects to be inflated, so that the user cannot flexibly operate the mini pump.

Furthermore, this mini air pump only provides hands to hold and carry out air filling operation. When using the tire of a bicycle to fill air, because the height of the tire is about the height below the waist of the human body, when the user holds the mini air pump When using an inflator, the user's body must be half-squatted or bent over so that the position of the hand corresponds to the position of the tire. Such an operation method is not ergonomic, and the user is limited by such an awkward posture. It can only be filled for a short time. For this mini pump, the hose is too short so that the mini pump cannot provide a comfortable and convenient filling environment.

Referring to U.S. Patent No. 6464477 "RETAINING DEVICE FOR APIVOTABLE HANDLE OF A HAND PUMP", it discloses a small pedal pump, which includes a cylinder 10, a connecting rod 18, a handle 30, and a pedal 13 , a hose 14 and a nozzle head 16 . The flexible pipe 14 connects the air nozzle head 16 and the cylinder 10. The flexible pipe 14 is a single-cut design and has a certain length. A certain distance can be kept between them, so that the cylinder 20 can be prevented from being close to the object to be inflated when the gas filling operation is performed.

But the extension effect provided by this single-cut flexible pipe 14 is limited. For the small-sized pump that can be stepped on, when the user performs the filling operation, the user's body must be close to the pump, and the user's feet must be Stepping on the pedal 13, the user's hand must be held on the handle 30. In other words, the user's body and the pump are close to each other. When the length of the single-section hose 14 is too short, the user's body, hand The head and feet will interfere with the bicycle. Therefore, for a pump that can be stepped on, the operating space of the pump needs to be larger to avoid interference between the user's body, hands, feet and the bicycle. This kind of pump cannot increase the distance between the user and the bicycle. , It will make the user unable to operate the pump flexibly and carry out the gas filling operation.

In addition, as far as the current high-quality bicycles are concerned, the price of bicycles is often hundreds of thousands of yuan. The requirements for functionality and appearance of such high-unit-priced bicycles are comparable. As far as the pump is concerned, the price of the pump has also increased from thousands of yuan to tens of thousands of yuan. Compared with bicycles, the pump is a small product, so users have regarded the pump as a high-quality product. In addition to the function In addition to the above requirements, we pay more attention to the simplicity and fashion sense of the pump for the appearance design. Therefore, the pump that can completely accommodate the hose is gradually attracting the attention of users.

It is therefore an object of the present invention to obviate or at least alleviate the problems encountered with the prior art.

Contents of the invention

The technical problem to be solved by the present invention is to provide a small foot-operated pump with an extension tube set to address the shortcomings of the prior art.

The small pedal pump with extension tube set of the present invention comprises: a cylinder set including a first end and a second end, the cylinder set is provided with a seat body, one side of the seat body is pivotally connected with a foot pedal a piece, the second end of the cylinder block is provided with a handle;

An extension pipe set is a three-section type, which can be completely stored in the cylinder block. The extension pipe set includes a first air pipe, a second air pipe and a third air pipe. The first air pipe can be stored in the second air pipe. The first air pipe can also be stored in the cylinder group, the first air pipe can extend out of the cylinder group, the first air pipe can extend out of the second air pipe, and the second air pipe can be completely stored in the cylinder group, The second air pipe can also be fully stretched out of the cylinder group, the third air pipe can be stored in the second air pipe, the third air pipe can also be stored in the cylinder group, and the third air pipe can extend out of the first air pipe. Two air pipes, one end of the third air pipe away from the first air pipe is connected with an air nozzle head, and the air nozzle head can be combined with the object to be inflated.

The main improved technical means of the present invention is that when the extension tube set is pulled out of the cylinder block, the user can carry out gas filling work away from the bicycle; when the three-stage extension tube set is completely pulled out of the cylinder block, the user and A distance is formed between the bicycles, which is approximately equal to the extended length of the extension tube group. The hands and body do not interfere with the bicycle, allowing the user to carry out inflating operations in an unrestricted environment.

The secondary improved technical means of the present invention is that the first air pipe and the second air pipe are designed as hoses, so that the first air pipe can be bent relative to the seat body of the cylinder group, and the first air pipe can also be bent relative to the second air pipe. The third air pipe can be bent relative to the nozzle head, and the third air pipe can also be bent relative to the second air pipe, which can help the extension pipe set to accept objects to be inflated at any position or height.

Another improved technical means of the present invention is that the second trachea is designed as a hard tube so that the first trachea and the third trachea can be stored inside the second trachea, which can solve the problem of the first trachea and the third trachea being exposed. And the disadvantage of shaking.

Another improved technical means of the present invention is that the cylinder group of the small pedal pump can completely accommodate the extension tube group, so that the appearance of the small pedal pump is simple and full of fashion sense, and a high-quality pump is provided. pump.

Other objects, advantages and novel features of the present invention will be more apparent from the following detailed description and associated drawings.

Description of drawings

Fig. 1: It is the three-dimensional appearance view of the contracted small foot-pump with extension tube set of the present invention.

Fig. 2: It is the three-dimensional exploded view of the extension of the foot-operated small pump with the extension tube set of the present invention.

FIG. 3 : is a schematic cross-sectional view of a small foot pump with an extension tube set according to the present invention.

Fig. 4: be the detail enlargement figure that Fig. 3 is taken of the present invention, the schematic diagram of table inflator one end.

Fig. 5: be the detailed enlarged view that Fig. 3 is taken of the present invention, the schematic diagram of the other end of table pump.

Fig. 6: It is a schematic diagram showing that the air nozzle head is detached from the seat when the air intake operation of the foot-operated small air pump with the extension tube group is in operation.

Fig. 7: is the detailed enlarged view taken by Fig. 6 of the present invention.

Fig. 8: It is a schematic view showing that the extension tube set of the foot-operated small air pump with the extension tube set fully extends out of the cylinder block of the present invention.

Fig. 9 is a schematic diagram of the second air pipe partially extending into the cylinder block of the foot-operated small air pump with the extension pipe group of the present invention.

Figure 10: It shows that the small foot pump of the present invention is held by hand and used, showing that the extension tube set extends out of the cylinder set.

Fig. 11: It is a schematic diagram of a foot-operated small air pump with an extension tube set to be used on the ground according to the present invention.

Fig. 12: It is a schematic diagram of the air nozzle head combined with the French air nozzle of the present invention.

[Description of main component symbols]

10 Cylinder group 101 First end 102 Second end 11 Seat body 111 Internal thread part

112 Blocking part 113 Accommodating part 114 Groove 1141 Closed end 1142 Open end

115 bumps 12 pedals 121 first end 122 second end 13 handle

131 Fixed part 132 Grip part 14 Piston tube 141 External thread part 142 Piston

15 cylinder body 151 retaining part 20 extension pipe group 21 first air pipe 211 first plug body

212 The second plug body 22 The second trachea 221 The first detachment prevention part 222 The second detachment prevention part 23 The third trachea

231 Third plug body 30 Nozzle head 31 Head 311 Recess 312 Elastic part

32 Body 33 Positioning device 331 Large diameter end 332 Small diameter end FV French valve

FV1 valve tube

Detailed ways

Regarding the technology, means and effects adopted by the present invention, several preferred embodiments are given and described in detail with the accompanying drawings. This is for illustration only, and is not limited by this structure in the scope of patent protection. .

Referring to FIG. 1 and FIG. 2 , it is a three-dimensional appearance view and a three-dimensional exploded view of a first embodiment of a small pedal pump with an extension tube set according to the present invention. The small pedal pump with extension tube set of the present invention includes a cylinder set 10 , a handle 13 , an extension tube set 20 and a nozzle head 30 . The cylinder set 10 of the air pump of the present invention can completely accommodate the extension tube set 20, so that the appearance of the air pump is simple and full of fashion sense, and a high-quality air pump is provided.

Referring to FIG. 3 to FIG. 5 at the same time, it is a cross-sectional view and a detailed enlarged view of the first embodiment of the small pedal pump with an extension tube set in the present invention. The cylinder group 10 includes a first end 101 and a second end 102. The first end 101 of the cylinder group 10 is provided with a seat 11, and one side of the seat 11 is pivotally connected with a pedal 12. The second end of the cylinder group 10 102 is provided with a handle 13 . The cylinder block 10 includes a piston tube 14 and a cylinder body 15 , one end of the piston tube 14 is provided with an external thread portion 141 , and the other end of the piston tube 14 is provided with a piston 142 . One end of the cylinder body 15 is provided with a blocking portion 151 , and the other end of the cylinder body 15 is combined with the handle 13 . The cylinder body 15 can move back and forth relative to the piston tube 14 to produce an air filling effect.

When the foot-operated small air pump of the present invention is used on the ground, the base body 11 can be supported on the ground. And when the small-sized air pump that can be pedaled is held with the hand and used, the base body 11 can be held by the user's hand. The seat body 11 is hollow, and is longitudinally provided with an internal thread portion 111, a stopper portion 112 and a receiving portion 113. The internal thread portion 111 is screwed with the external thread portion 141, so that the seat body 11 is combined with the piston. Tube 14. Two grooves 114 are respectively defined on two sides of the base body 11 , and the footrest 12 is located between the two grooves 114 . The groove 114 communicates with the receiving portion 113. The two ends of the groove 114 are respectively a closed end 1141 and an open end 1142. The closed end 1141 is approximately a circular curve, and the curve of the closed end 1141 is greater than half A circle, and less than three quarters of a circle. A plurality of protruding points 115 are formed on the end of the base body 11 away from the end of the piston tube 14 .

The footrest 12 can be changed into a storage position and a stepping position. The footrest 12 includes a first end 121 and a second end 122. The first end 121 of the footrest 12 is pivotally connected to the seat 11. The footrest 12 When the pedal 12 is in the stowed position, the second end 122 of the footrest 12 is adjacent to the base 11 ;

The handle 13 includes a fixing portion 131 and a gripping portion 132 . The fixing part 131 is fixed on the cylinder body 15, the grip part 132 is pivotally connected to the fixing part 131, and the grip part 132 can pivot relative to the fixing part 131, so that the grip part 132 can be changed into a storage position and a storage position. In the operating position, when the holding portion 132 is in the storage position, the holding portion 132 covers the fixing portion 131 ; when the holding portion 132 is in the operating position, the holding portion 132 and the fixing portion 131 form a T-shape.

The extension tube set 20 is a three-section type, which can be completely stored in the cylinder block 10. The extension tube set 20 includes a first air pipe 21, a second air pipe 22 and a third air pipe 23. The first and second air pipes The three air pipes 21, 23 are flexible pipes, and the second air pipe 22 is a hard pipe. With the design of the second air pipe 22 being a hard pipe, the first air pipe 21 and the third air pipe 23 can be easily stored in the second air pipe. Inside the trachea 22 , the disadvantages of the first trachea 21 and the third trachea 23 being exposed and shaking can be solved.

The first air pipe 21 can be stored in the piston pipe 14 of the cylinder block 10 . The first air pipe 21 can extend out of the second air pipe 22 , and the first air pipe 21 can also extend out of the piston tube 14 of the cylinder block 10 .

The second air pipe 22 can be completely stored in the piston pipe 14 of the cylinder block 10 , and the second air pipe 22 can also be completely extended out of the piston pipe 14 of the cylinder block 10 .

The third air pipe 23 can be housed in the piston pipe 14 of the cylinder block 10 . The third air pipe 23 can extend out of the second air pipe 22 , and the third air pipe 23 can also extend out of the piston pipe 14 of the cylinder block 10 .

Two ends of the first air pipe 21 are respectively provided with a first plug body 211 and a second plug body 212 . Two ends of the second air pipe 22 are respectively provided with a first anti-loosening portion 221 and a second anti-loosening portion 222 . A third plug body 231 is disposed at one end of the third air pipe 23 .

The first plug body 211 of the first air pipe 21 is located in the piston tube 14, and the first plug body 211 is limited between the piston 142 of the piston tube 14 and the stopper 112 of the seat body 11. The plug body 211 is blocked by the blocking portion 112 . The second plug body 212 of the first air pipe 21 is located in the second air pipe 22, and the second plug body 212 is limited between the first anti-off part 221 and the second anti-off part 222, the second plug The body 212 is blocked by the first anti-loosening portion 221 .

The third plug body 231 of the third air pipe 23 is located in the second air pipe 22, and the third plug body 231 is limited between the first anti-off part 221 and the second anti-off part 222, the third plug The body 231 is blocked by the second anti-loosening portion 222 . An end of the third air pipe 23 away from the first air pipe 21 is connected with a nozzle head 30 .

The nozzle head 30 includes a head portion 31 and a body portion 32 , the head portion 31 of the nozzle head 30 can be combined with the object to be inflated, and the body portion 32 is combined with the third air pipe 23 . A plurality of concave portions 311 are formed on the end surface of the head portion 31 adjacent to the body portion 32 , and the concave portions 311 can correspond to the protruding points 115 of the base body 11 . The body 32 can be combined with the third trachea 23 , and two sides of the body 32 are respectively provided with a positioning device 33 , and the positioning device 33 can be positioned at the closed end 1141 through the open end 1142 . The positioning device 33 is tapered and includes a large-diameter end 331 and a small-diameter end 332 . When the large-diameter end 331 corresponds to the closed end 1141 , the positioning device 33 can be limited to the groove 114 . When the small-diameter end 332 corresponds to the closed end 1141 , the positioning device 33 can disengage from the groove 114 .

Referring to FIG. 6 to FIG. 9 , they are action diagrams of the first embodiment of the small foot pump with extension tube set in the present invention. The air nozzle head 30 of the air pump of the present invention can be accommodated in the accommodation portion 113 of the seat body 11, and the positioning device 33 can be positioned in the groove 114, and the air nozzle head 30 can be separated from the seat body 11 by pressing the positioning device 33 .

When using the pump of the present invention, turn the handle 13 to the operating position, so that the handle 132 is rotated relative to the fixed portion 131, so that the handle 13 is T-shaped, and the handle 13 can be used by the user. hold.

When the nozzle head 30 is separated from the seat body 11 of the cylinder block 10 , the nozzle head 30 can pull the extension tube set 20 . When pulling the nozzle head 30, the third air pipe 23 slides relative to the second air pipe 22, and the third air pipe 23 protrudes outside the cylinder group 10; when the nozzle head 30 is continuously pulled, the second air pipe 22 is relatively The first air pipe 21 slides, and the second air pipe 22 protrudes outside the cylinder group 10; the tuyere head 30 is pulled again, and the first air pipe 21 slides relative to the piston pipe 14, so that the first air pipe 21 of the first air pipe 21 slides. A plug body 211 is positioned on the blocking portion 112 of the base body 11 , and the first air pipe 21 and the third air pipe 23 can be extended from both ends of the second air pipe 22 . At this time, the extension tube set 20 is fully extended.

Referring to FIG. 10 , it is a schematic view of the pump of the present invention with a hand-held pump, showing a schematic view of the extension tube set pulled out of the cylinder set. Users can choose to pull the extension tube set 20 out of the cylinder set 10 or store it in the cylinder set 10 according to their needs. When the extension tube set 20 is pulled out of the cylinder block 10, the user can carry out gas filling work away from the bicycle. When the three-stage extension tube set 20 is completely pulled out of the cylinder block 10, the user holds the seat body 11, hold the handle 13 with the other hand, and make the cylinder body 15 reciprocate relative to the piston tube 14 to achieve the gas filling effect. At this time, a distance is formed between the user and the bicycle, which is approximately equal to the extended length of the extension pipe set 20. During the gas operation, the user's hands and body will not come into contact with the bicycle, allowing the user to perform the gas filling operation in an unrestricted environment.

Referring to FIG. 11 , it is a schematic diagram of the use of the air pump of the present invention on the ground. The foot-operable small air pump of the present invention can be used on the ground for inflating operations. The base body 11 is supported on the ground, the pedal member 12 is located at the stepping position, and the handle 13 is T-shaped so that the grip portion 132 is located In the operating position, when the extension tube set 20 is pulled out of the cylinder set 10 , the first air tube 21 can be bent and protrude from the groove 114 of the seat body 11 as shown in FIG. 2 . The user can carry out gas filling operation away from the bicycle. When the three-stage extension pipe set 20 is completely pulled out of the cylinder set 10, the user holds the seat body 11 with one hand and steps on the pedal member 12 to make the barrel The body 15 reciprocates relative to the piston tube 14 to achieve the gas filling effect. At this time, a distance is formed between the user and the bicycle, which is approximately equal to the extended length of the extension pipe set 20. During the gas operation, the user's hands, feet and body will not come into contact with the bicycle, allowing the user to perform the gas filling operation in an unrestricted environment.

Referring to FIG. 12 , it is a schematic diagram of a nozzle head combined with a French nozzle according to the present invention. The head 31 of the tuyere head 30 is provided with an elastic member 312 which can push open the valve tube FV1 of the French valve FV so that the gas of the tire communicates with the gas of the pump.

Can conclude that the present invention has the following advantages with regard to the above:

1. The present invention has a foot-operable small-sized pump with an extension tube set. When the extension tube set is pulled out of the cylinder set, the user can carry out the gas filling operation away from the bicycle. When the three-stage extension tube set is completely pulled out In the cylinder group, a distance is formed between the user and the bicycle, which is approximately equal to the length of the extension tube group. When the user wants to perform gas filling operations, the user can carry out the operation because the user is far away from the bicycle. During the gas filling operation, the user's hands and body will not interfere with the bicycle, so that the user can perform the gas filling operation in an unrestricted environment.

2. The present invention has a small pedal pump with an extension tube group. The first air pipe and the second air pipe are designed as flexible pipes, so that the first air pipe can be bent relative to the seat of the cylinder group, and the first air pipe can also be bent. Can be bent relative to the second air pipe, the third air pipe can be bent relative to the nozzle head, and the third air pipe can also be bent relative to the second air pipe, which can help the extension pipe set to accept any position or any height to be inflated.

3. The present invention has a small pedal pump with an extension tube set. The second air tube is designed as a hard tube so that the first air tube and the third air tube can be stored inside the second air tube, which can solve the problem of the first air tube. The trachea and the third trachea are exposed and shaken.

4. The present invention has a small pedal pump with an extension tube group, and the cylinder group of the pump can completely accommodate the extension tube group, so that the appearance of the small pedal pump is simple and full of fashion sense, and provides a high-quality product The small pedal pump.

The above is only a preferred embodiment of the present invention, and should not limit the implementation scope of the present invention, so it refers to the change of numerical value or the replacement of equivalent components, or according to the content disclosed in the present invention. Equal changes and modifications should still belong to the category covered by the patent of the present invention.

Claims (10)

1. A foot-operated small pump with an extension tube set, characterized in that it comprises: A cylinder group, which includes a first end and a second end, the cylinder group is provided with a seat body, one side of the seat body is pivotally connected with a pedal, and the second end of the cylinder group is provided with a handle; The extension pipe set is a three-section type, which can be completely stored in the cylinder block. The extension pipe set includes a first air pipe, a second air pipe and a third air pipe. The first air pipe can be stored in the second air pipe , the first air pipe can also be stored in the cylinder group, the first air pipe can extend out of the cylinder group, the first air pipe can extend out of the second air pipe, and the second air pipe can be completely stored in the cylinder group Inside, the second air pipe can also be fully stretched out of the cylinder group, the third air pipe can be stored in the second air pipe, the third air pipe can also be stored in the cylinder group, and the third air pipe can extend out of the cylinder group. The ends of the second air pipe and the third air pipe away from the first air pipe are connected with a nozzle head, and the nozzle head can be combined with the object to be inflated. 2 . The small foot pump with an extension tube set as claimed in claim 1 , wherein the first and third air tubes are soft tubes, and the second air tube is a hard tube. 3 . 3. The foot-operated small pump with an extension tube set as claimed in claim 1, wherein the cylinder set includes a piston tube and a barrel body, the barrel body is sleeved on the piston tube, and the extension tube set wears located in the piston tube. 4 . The small foot pump with extension tube set as claimed in claim 3 , wherein the handle comprises a fixing part, and the fixing part fixes the cylinder body. 5. The small pedal pump with extension tubes as claimed in claim 3, characterized in that, the two ends of the first air pipe are respectively provided with a first plug body and a second plug body, and the two ends of the second air pipe are One end of the third air pipe is provided with a first anti-off part and a second anti-off part, and one end of the third air pipe is provided with a third plug body, the first plug body of the first air pipe can move in the piston tube, and the second plug body is located at In the second air pipe, and the second plug body is limited between the first anti-off part and the second anti-off part, the second plug body is blocked by the first anti-off part, and the third air pipe The third plug body is located in the second air pipe, and the third plug body is limited between the first anti-off part and the second anti-off part, and the third plug body is blocked by the second anti-off part department. 6. The foot-operable small pump with an extension tube set as claimed in claim 5, wherein a groove is respectively provided on both sides of the seat body, and the extension tube set is pulled out of the cylinder block When, the first air tube can be bent and protrude from the groove of the seat body. 7. The foot-operable small pump with extension tube set as claimed in claim 6, wherein the nozzle head includes a head and a body, the head can be combined with the object to be inflated, and the body is combined with in the third trachea. 8. The foot-operable small air pump with extension tube set as claimed in claim 7, characterized in that, the seat body is longitudinally provided with a stop portion and a receiving portion, and the first plug body is blocked by the stopper The stop portion, the nozzle head can be accommodated in the accommodation portion of the seat body. 9. The foot-operable small air pump with extension tube set as claimed in claim 8, wherein the groove communicates with the accommodating part, and the two ends of the groove are respectively a closed end and an open end, Both sides of the head and body of the tuyere are respectively provided with a positioning device, and the positioning device can be positioned at the closed end through the open end. 10. The foot-operable small air pump with extension tube set as claimed in claim 9, wherein the closed end is approximately a circular curve, and the curve of the closed end is larger than half a circle and less than Three quarters of a circle, the positioning device is tapered, and it includes a large diameter end and a small diameter end, when the large diameter end corresponds to the closed end, the positioning device can be limited to the groove, and the small diameter end corresponds to When the end is closed, the positioning device can break away from the groove.

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