CN219020425U - Self-following intelligent draw-bar box - Google Patents

Abstract

The utility model discloses a self-following intelligent draw-bar box, and belongs to the field of draw-bar boxes. The utility model provides an intelligence draw-bar box of self-following, includes the box, still includes: the pull rod is rotationally connected to the rear wall of the box body through a first rotating seat; the bottom plate is fixedly connected to the bottom of the box body, an electric roller is arranged at the lower end of the bottom plate through a buffer mechanism, a blowing nozzle corresponding to the electric roller is arranged at the lower end of the bottom plate, and a gas storage assembly connected with the blowing nozzle is arranged in the bottom plate; the two support legs are both connected between the two telescopic rods of the pull rod in a rotating way through the second rotating seat, wherein a limiting cross rod matched with the support legs is fixedly connected between the telescopic rods of the pull rod, and a supporting cross rod is fixedly connected between the tail ends of the two support legs; the utility model can disperse the weight of a user to the supporting legs and the sliding rods, thereby effectively reducing the damage of the electric roller caused by overload.

Description

Self-following intelligent draw-bar box

Technical Field

The utility model relates to the technical field of draw-bar boxes, in particular to a self-following intelligent draw-bar box.

Background

The draw-bar box refers to a luggage case having a draw bar and rollers. Is widely used because of convenient use. Meanwhile, the draw-bar box is also provided with a draw bar due to the fact that the draw-bar box is provided with a single-tube draw bar and a double-tube draw bar, and the tubes of the draw bar are also provided with square tubes and round tubes, so that the draw-bar box is convenient to drag during walking, and the burden is greatly reduced. Along with the development of science, some intelligent draw-bar boxes can also make it follow the user automatically through bluetooth and ultrasonic technique, need not the manual work and drag, use convenience promotes greatly.

The existing draw-bar box has relatively single function, when a user needs to rest, if the user has no seat around, the user needs to sit on the draw-bar box directly, and although some draw-bar boxes can bear certain weight, the service life of the draw-bar box is greatly reduced, especially the wheels of the draw-bar box are easy to damage, particularly the wheels can generate high heat after the draw-bar box is pulled for a period of time, and the wheels are easy to deform and damage when being subjected to larger pressure.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a self-following intelligent draw-bar box.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an intelligence draw-bar box of self-following, includes the box, still includes: the pull rod is rotationally connected to the rear wall of the box body through a first rotating seat; the bottom plate is fixedly connected to the bottom of the box body, an electric roller is arranged at the lower end of the bottom plate through a buffer mechanism, a blowing nozzle corresponding to the electric roller is arranged at the lower end of the bottom plate, and a gas storage assembly connected with the blowing nozzle is arranged in the bottom plate; the two supporting legs are all connected between two telescopic rods of the pull rod in a rotating mode through the second rotating seat, limiting cross rods matched with the supporting legs are fixedly connected between the telescopic rods of the pull rod, supporting cross rods are fixedly connected between the tail ends of the two supporting legs, and a storage limiting assembly matched with the pull rod and the supporting legs is arranged on the rear wall of the box body.

In order to buffer jolt in the moving process of the box body, preferably, the buffer mechanism comprises a slide tube fixedly connected to the lower end of the bottom plate, a buffer slide block is connected in the slide tube in a sliding manner, the buffer slide block is elastically connected with the inner top of the slide tube through a buffer spring, and the electric roller is fixedly arranged at the lower end of the buffer slide block.

In order to effectively dissipate heat of the electric roller, preferably, the gas storage assembly comprises a mounting cavity arranged in the bottom plate, an elastic gas storage air bag is fixedly connected in the mounting cavity, an inflation tube and an output tube which are communicated with the elastic gas storage air bag are fixedly connected to the side wall of the elastic gas storage air bag, the tail end of the output tube is fixedly connected with the blowing nozzle, and an electromagnetic valve is fixedly installed in the output tube.

For the convenience accomodates pull rod and landing leg, further, accomodate spacing subassembly including two sleeve pipes of fixed connection at the box back wall, two equal sliding connection of sleeve pipe has the slide bar, two fixedly connected with steps on the pole between the lower extreme of slide bar, step on through first reset spring elastic connection between pole and the sleeve pipe, two the upper end fixedly connected with horizontal pin of slide bar.

In order to inflate the elastic gas storage air bag without external equipment, further, an elastic gas inflation air bag is connected between the buffer slide block and the inner top of the slide tube, a first air suction pipe and a first air discharge pipe which are communicated with the elastic gas inflation air bag are fixedly connected to the side wall of the elastic gas inflation air bag, the first air discharge pipe is fixedly connected and communicated with the gas inflation pipe through a first connecting pipe, and a one-way valve is fixedly installed on each of the first air suction pipe and the first air discharge pipe.

In order to make the user more comfortable when sitting, further, highly be connected with the box body between two telescopic links of pull rod, the interior bottom fixedly connected with flexible gasbag of box body, through second reset spring elastic connection between the inner wall of flexible gasbag, the lateral wall fixedly connected with of flexible gasbag rather than the second breathing pipe and the second blast pipe of intercommunication, the second blast pipe passes through second connecting pipe and gas tube fixed connection, equal fixed mounting has the check valve in second breathing pipe and the second blast pipe.

In order to carry out hidden accomodating with landing leg and support horizontal pole, still further, the outer wall of box body is equipped with landing leg and support horizontal pole complex storage tank.

In order to enable the support leg to automatically rotate to be propped against the limiting cross rod, a torsion spring is preferably connected between the support leg and the second rotating seat.

In order to make the supporting leg stressed more uniformly, preferably, the outer wall of the limiting cross rod is provided with an inclined plane matched with the supporting leg.

In order to more conveniently control the on-off of the output pipe, further, a button connected with an electromagnetic valve in the output pipe is fixedly arranged on a handle of the pull rod.

Compared with the prior art, the utility model provides the self-following intelligent draw-bar box, which has the following beneficial effects:

1. according to the self-following intelligent draw-bar box, the pedal rod is stepped down, then the draw bar is turned to be in a horizontal state, the two support legs are turned to enable the tail ends of the two support legs to be in contact with the ground, a user can sit on the draw bar for rest, and the weight of the draw bar is divided into the support legs and the slide bar, so that the damage condition of the electric roller due to overlarge load is effectively reduced;

2. according to the self-following intelligent draw-bar box, jolt in the moving process of the box body can be effectively buffered through the cooperation of the buffer sliding block and the buffer spring, so that articles in the box body are protected;

3. according to the self-following intelligent trolley case, the electromagnetic valve in the output pipe is opened, the air blowing nozzle blows air to the rotating electric roller, so that heat dissipation is effectively carried out on the electric roller, dust on the electric roller can be blown off, friction force on the electric roller is reduced, and the service life of the electric roller is greatly prolonged;

4. the self-following intelligent trolley case can indirectly push against the elastic inflatable air bag through the buffer sliding block, and the elastic inflatable air bag can inflate the elastic air storage air bag through the first exhaust pipe, so that external equipment is not needed to inflate the elastic air storage air bag, and energy is saved;

5. according to the self-following intelligent trolley case, the softness of the telescopic air bag can be improved through the second reset spring in the telescopic air bag, so that a user can feel more comfortable when sitting;

6. this intelligence draw-bar box from following, when squeezing flexible gasbag through the user, flexible gasbag can be through the second blast pipe to the elasticity gas storage gasbag aerify to effectively utilize human gravity to aerify the elasticity gas storage gasbag, further practiced thrift the energy.

Drawings

Fig. 1 is a schematic structural diagram of a self-following intelligent draw-bar box according to the present utility model;

fig. 2 is a schematic structural diagram of a storage state of a self-following intelligent trolley case according to the present utility model;

FIG. 3 is a schematic view of the right-side view of the intelligent draw-bar box according to the present utility model;

FIG. 4 is a schematic diagram of the structure of the self-following intelligent trolley case shown in FIG. 1A;

FIG. 5 is a schematic diagram of the structure of the self-following intelligent trolley case shown in FIG. 1B;

FIG. 6 is a schematic view of the structure of the self-following intelligent trolley case shown in FIG. 1 at C;

fig. 7 is a schematic diagram of the structure of the self-following intelligent trolley case in fig. 3D according to the present utility model.

In the figure: 1. a case; 2. a first rotating seat; 3. a pull rod; 4. a bottom plate; 5. an electric roller; 6. a limiting cross bar; 7. a second rotating seat; 8. a support leg; 9. a support rail; 10. a sleeve; 11. a slide bar; 12. stepping on the pedal rod; 13. a first return spring; 14. an air blowing nozzle; 15. a mounting cavity; 16. an output pipe; 17. an inflation tube; 18. a slide tube; 19. a buffer slider; 20. a buffer spring; 21. an elastic inflatable balloon; 22. a first air suction pipe; 23. a first exhaust pipe; 24. an elastic gas storage air bag; 25. a first connection pipe; 26. a case body; 27. a telescopic air bag; 28. a second return spring; 29. a second exhaust pipe; 30. a second air suction pipe; 31. a second connection pipe; 32. a storage groove; 33. a transverse stop lever; 34. and (5) an inclined plane.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1:

referring to fig. 1-7, a self-following intelligent draw-bar box, comprising a box body 1, further comprising: the pull rod 3 is rotatably connected to the rear wall of the box body 1 through the first rotating seat 2; the bottom plate 4 is fixedly connected to the bottom of the box body 1, wherein an electric roller 5 is arranged at the lower end of the bottom plate 4 through a buffer mechanism, an air blowing nozzle 14 corresponding to the electric roller 5 is arranged at the lower end of the bottom plate 4, and an air storage assembly connected with the air blowing nozzle 14 is arranged in the bottom plate 4; the two supporting legs 8 are rotatably connected between the two telescopic rods of the pull rod 3 through the second rotating seat 7, wherein a limit cross rod 6 matched with the supporting legs 8 is fixedly connected between the telescopic rods of the pull rod 3, a support cross rod 9 is fixedly connected between the tail ends of the two supporting legs 8, the rear wall of the box body 1 is provided with a storage limit component matched with the pull rod 3 and the supporting legs 8, in the use of the box body 1, the buffer mechanism can buffer jolt in the moving process of the box body 1, thereby protecting articles in the box body 1, the air storage component can supply air to the air blowing nozzle 14, the air blowing nozzle 14 can blow air to the rotating electric roller 5, thereby effectively radiating the electric roller 5 and blowing dust on the electric roller 5, reduce electric gyro wheel 5 and receive frictional force, and then promote electric gyro wheel 5's life greatly, when the user needs to stop the rest, remove the spacing to pull rod 3 through accomodating spacing subassembly, afterwards rotate pull rod 3 to the horizontality through first rotation seat 2, then rotate two landing legs 8 through second rotation seat 7, make the terminal support horizontal pole 9 of landing leg 8 contact with ground, and make one side of landing leg 8 push up on spacing horizontal pole 6, landing leg 8 and ground slope support pull rod 3 this moment, at this moment the user can sit on pull rod 3 and have a rest, because the weight of pull rod 3 is divided to landing leg 8 and accomodate spacing subassembly on, thereby effectively reduce electric gyro wheel 5 because of the circumstances that receives the too big damage of carrying.

Further, a torsion spring is connected between the supporting leg 8 and the second rotating seat 7, so that the supporting leg 8 can automatically rotate to be propped against the limiting cross rod 6 when no limit exists.

Furthermore, the outer wall of the limit cross bar 6 is provided with an inclined plane 34 matched with the supporting leg 8, and the supporting leg 8 can be stressed more uniformly through the inclined plane 34.

Example 2:

referring to fig. 1 and 4, substantially the same as in embodiment 1, further: the buffer mechanism comprises a slide tube 18 fixedly connected to the lower end of the bottom plate 4, a buffer slide block 19 is slidably connected to the slide tube 18, the buffer slide block 19 is elastically connected with the inner top of the slide tube 18 through a buffer spring 20, the electric roller 5 is fixedly arranged at the lower end of the buffer slide block 19, and in the moving process of the box body 1, the buffer slide block 19 can buffer jolt in the moving process of the box body 1 through the buffer spring 20, so that objects in the box body 1 are protected.

Example 3:

referring to fig. 1 and 4, substantially the same as in embodiment 1, further: the gas storage subassembly is including setting up the installation cavity 15 in bottom plate 4, installation cavity 15 internal fixation has elasticity gas storage gasbag 24, the lateral wall fixedly connected with of elasticity gas storage gasbag 24 rather than inflation tube 17 and the output tube 16 of intercommunication, the end and the air cock 14 fixed connection of output tube 16, fixed mounting has electromagnetic valve in the output tube 16, in the box 1 removal in-process, open electromagnetic valve in the output tube 16, elasticity gas storage gasbag 24 can carry the inside air to the air cock 14 through output tube 16, air cock 14 then can blow pivoted electronic gyro wheel 5, thereby effectively dispel the heat to electronic gyro wheel 5, and can also blow down the dust on the electronic gyro wheel 5, reduce electronic gyro wheel 5 and receive frictional force, and then promote the life of electronic gyro wheel 5 greatly.

Furthermore, a button connected with the electromagnetic valve in the output pipe 16 is fixedly arranged on the handle of the pull rod 3, and the on-off of the output pipe 16 can be controlled more conveniently through the button on the handle of the pull rod 3.

Example 4:

referring to fig. 1 to 3, substantially the same as in embodiment 1, further: the storage limiting component comprises two sleeves 10 fixedly connected to the rear wall of the box body 1, two sleeves 10 are all connected with sliding rods 11 in a sliding mode, a treading rod 12 is fixedly connected between the lower ends of the two sliding rods 11, the treading rod 12 is elastically connected with the sleeves 10 through a first reset spring 13, the upper ends of the two sliding rods 11 are fixedly connected with a transverse stop rod 33, in the use of the box body 1, the sliding rods 11 can block the pull rod 3 and the two supporting legs 8 through the transverse stop rod 33, so that the sliding rods are movably limited, when a user needs to stop for rest, the treading rod 12 is stepped down, the sliding rods 11 are driven to be separated from the lateral walls of the transverse stop rod 33 and the pull rod 3, at the moment, the pull rod 3 is not limited by the transverse stop rod 33, then the pull rod 3 is rotated to a horizontal state through a first rotating seat 2, then the two supporting rods 8 are rotated through a second rotating seat 7, the supporting cross rod 9 at the tail ends of the supporting legs 8 is contacted with the ground, one sides of the supporting legs 8 are propped against the limiting cross rod 6, at the moment, the supporting legs 8 are inclined with the ground to support the pull rod 3, the treading rod 12 are loosened, the transverse stop rod 33 and the lateral stop rod 33 and the supporting legs 8 are respectively supported by the supporting legs 8 and the supporting legs 8, the lateral stop rods 3, the lateral stop rod 33 can be broken, the electric weight of the user can be greatly reduced due to the fact that the user can be supported by the supporting legs 3 and the supporting rods 3 to the supporting legs 3 are in the two sides due to the fact that the situation that the supporting users are greatly damaged by the supporting rods are in the situation.

Example 5:

referring to fig. 1 and 4, substantially the same as in embodiment 1, further: an elastic inflatable airbag 21 is connected between the buffer slide block 19 and the inner top of the slide tube 18, a first air suction tube 22 and a first air discharge tube 23 which are communicated with the elastic inflatable airbag 21 are fixedly connected to the side wall of the elastic inflatable airbag 21, the first air discharge tube 23 is fixedly connected and communicated with the inflatable tube 17 through a first connecting tube 25, one-way valves are fixedly arranged on the first air suction tube 22 and the first air discharge tube 23, when the buffer slide block 19 buffers the vibration of the movement of the box body 1, the buffer slide block 19 can indirectly press the elastic inflatable airbag 21, the elastic inflatable airbag 21 can discharge air through the first air discharge tube 23, the first air discharge tube 23 can inflate the elastic air storage airbag 24 through the first connecting tube 25 and the inflatable tube 17, so that an external device is not needed to inflate the elastic air storage airbag 24, energy sources are saved, when the elastic inflatable airbag 21 is not extruded, the elastic air storage airbag is elastically reset, and external air is sucked through the first air suction tube 22.

Example 6:

referring to fig. 1, 3, 4, 6 and 7, the present utility model is substantially the same as that of embodiment 1, and further: the box body 26 is connected to the height between the two telescopic rods of the pull rod 3, the telescopic airbag 27 is fixedly connected to the inner bottom of the box body 26, the inner walls of the telescopic airbag 27 are elastically connected through the second reset spring 28, the side wall of the telescopic airbag 27 is fixedly connected with the second air suction pipe 30 and the second air discharge pipe 29 which are communicated with the telescopic airbag, the second air discharge pipe 29 is fixedly connected with the air charging pipe 17 through the second connecting pipe 31, the check valves are fixedly arranged in the second air suction pipe 30 and the second air discharge pipe 29, when a user sits on the pull rod 3, the user can sit on the telescopic airbag 27 directly, the second reset spring 28 in the telescopic airbag 27 can promote the softness of the telescopic airbag 27, so that the user is more comfortable when sitting and pressing the telescopic airbag 27 by the user, the second air discharge pipe 29 can discharge air through the second air discharge pipe 29, the second air discharge pipe 29 can charge the elastic air storage airbag 24 through the second connecting pipe 31 and the air charging pipe 17, so that the elastic air storage airbag 24 can be charged by effectively utilizing the gravity of a human body, the energy source is further saved, and when the telescopic airbag 27 is not pressed, the telescopic airbag 27 can be sucked through the second air suction pipe 30.

Further, the outer wall of the box 26 is provided with a storage groove 32 matched with the supporting leg 8 and the supporting cross bar 9, and the supporting leg 8 and the supporting cross bar 9 can be stored in a hidden mode through the storage groove 32.

Working principle: in the use of the box body 1, the slide bar 11 can block the pull rod 3 and the two support legs 8 through the transverse stop rod 33, so that the slide bar 11 can move and limit the slide bar, when a user needs to stop and rest, the user steps on the stepping bar 12 downwards, the slide bar 11 is driven to separate from the lateral wall of the pull rod 3, the pull rod 3 is not limited by the transverse stop rod 33, the pull rod 3 is rotated to a horizontal state through the first rotating seat 2, then the two support legs 8 are rotated through the second rotating seat 7, the support cross bar 9 at the tail ends of the support legs 8 are contacted with the ground, one side of the support legs 8 is propped against the limit cross bar 6, the support legs 8 are inclined with the ground to support the pull rod 3, the stepping bar 12 is loosened, the transverse stop rod 33 and the support legs 8 can respectively support the two sides of the pull rod 3, the user can sit on the pull rod 3 to rest, the weight of the pull rod 3 is separated onto the support legs 8 and the slide bar 11, the damage of the electric roller 5 due to the large load is effectively reduced, and the buffer slide block 19 can pass through the buffer spring 20 in the moving process of the box body 1. The buffer box body 1 jolts in the moving process, thereby protecting the articles in the box body 1, in the moving process of the box body 1, the electromagnetic valve in the output pipe 16 is opened, the elastic gas storage air bag 24 can convey the air in the box body 1 to the air blowing nozzle 14 through the output pipe 16, the air blowing nozzle 14 can blow the rotating electric roller 5, thereby effectively radiating the electric roller 5, and can blow off the dust on the electric roller 5, the friction force of the electric roller 5 is reduced, the service life of the electric roller 5 is greatly prolonged, the buffer slide block 19 can indirectly push the elastic gas storage air bag 21 when the buffer slide block 19 buffers the moving vibration of the box body 1, the elastic gas storage air bag 21 can exhaust through the first exhaust pipe 23, the first exhaust pipe 23 can charge the elastic gas storage air bag 24 through the first connecting pipe 25 and the gas charging pipe 17, therefore, the elastic gas storage air bag 24 is not required to be inflated by external equipment, energy is saved, when the elastic gas storage air bag 21 is not extruded, the elastic gas storage air bag 24 is elastically reset, external air is sucked through the first air suction pipe 22, when a user sits on the pull rod 3, the user can directly sit on the telescopic air bag 27, the second reset spring 28 in the telescopic air bag 27 can promote the softness of the telescopic air bag 27, so that the user is more comfortable when sitting, when the telescopic air bag 27 is extruded by the user, the second air discharge pipe 29 is used for discharging air, the second air discharge pipe 29 is used for inflating the elastic gas storage air bag 24 through the second connecting pipe 31 and the air charging pipe 17, thereby effectively utilizing the gravity of a human body to inflate the elastic gas storage air bag 24, further saving energy, the telescopic airbag 27 is sucked through the second suction pipe 30.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. The utility model provides an intelligence draw-bar box of self-following, includes box (1), its characterized in that still includes:

the pull rod (3) is rotationally connected to the rear wall of the box body (1) through the first rotating seat (2);

a bottom plate (4) fixedly connected to the bottom of the box body (1),

the lower end of the bottom plate (4) is provided with an electric roller (5) through a buffer mechanism, the lower end of the bottom plate (4) is fixedly provided with a blowing nozzle (14) corresponding to the electric roller (5), and a gas storage assembly connected with the blowing nozzle (14) is arranged in the bottom plate (4);

the two supporting legs (8) are both rotatably connected between the two telescopic rods of the pull rod (3) through the second rotating seat (7),

wherein, fixedly connected with and landing leg (8) complex spacing horizontal pole (6) between the telescopic link of pull rod (3), two fixedly connected with supports horizontal pole (9) between the end of landing leg (8), the back wall of box (1) is equipped with accomodates spacing subassembly with pull rod (3) and landing leg (8) complex.

2. The self-following intelligent trolley case according to claim 1, wherein the buffer mechanism comprises a slide tube (18) fixedly connected to the lower end of the bottom plate (4), a buffer slide block (19) is slidably connected to the slide tube (18), the buffer slide block (19) is elastically connected with the inner top of the slide tube (18) through a buffer spring (20), and the electric roller (5) is fixedly mounted at the lower end of the buffer slide block (19).

3. The self-following intelligent trolley case according to claim 2, wherein the gas storage component comprises a mounting cavity (15) arranged in the bottom plate (4), an elastic gas storage air bag (24) is fixedly connected in the mounting cavity (15), an inflation tube (17) and an output tube (16) which are communicated with the side wall of the elastic gas storage air bag (24) are fixedly connected with the side wall of the elastic gas storage air bag, the tail end of the output tube (16) is fixedly connected with the blowing nozzle (14), and an electromagnetic valve is fixedly arranged in the output tube (16).

4. A self-following intelligent draw-bar box according to claim 3, characterized in that the storage limiting assembly comprises two sleeves (10) fixedly connected to the rear wall of the box body (1), the two sleeves (10) are both connected with sliding bars (11) in a sliding manner, a stepping bar (12) is fixedly connected between the lower ends of the two sliding bars (11), the stepping bar (12) is elastically connected with the sleeves (10) through a first reset spring (13), and the upper ends of the two sliding bars (11) are fixedly connected with transverse stop bars (33).

5. The self-following intelligent trolley case according to claim 4, wherein an elastic inflatable airbag (21) is connected between the buffer slider (19) and the inner top of the slide tube (18), a first air suction tube (22) and a first air discharge tube (23) which are communicated with the elastic inflatable airbag (21) are fixedly connected to the side wall of the elastic inflatable airbag (21), the first air discharge tube (23) is fixedly connected and communicated with the air charging tube (17) through a first connecting tube (25), and one-way valves are fixedly installed on the first air suction tube (22) and the first air discharge tube (23).

6. A self-following intelligent draw-bar box according to claim 3, characterized in that a box body (26) is highly connected between two telescopic rods of the draw bar (3), a telescopic airbag (27) is fixedly connected to the inner bottom of the box body (26), the inner walls of the telescopic airbag (27) are elastically connected through a second reset spring (28), a second air suction pipe (30) and a second air discharge pipe (29) which are communicated with the telescopic airbag (27) are fixedly connected to the side walls of the telescopic airbag, the second air discharge pipe (29) is fixedly connected with an air charging pipe (17) through a second connecting pipe (31), and one-way valves are fixedly installed in the second air suction pipe (30) and the second air discharge pipe (29).

7. A self-following intelligent trolley case as claimed in claim 6, wherein the outer wall of the box (26) is provided with a receiving slot (32) for cooperation with the leg (8) and the support rail (9).

8. A self-following intelligent trolley case according to claim 1, characterized in that a torsion spring is connected between the leg (8) and the second swivel base (7).

9. A self-following intelligent trolley case according to claim 1, characterized in that the outer wall of the limit rail (6) is provided with a bevel (34) cooperating with the leg (8).

10. A self-following intelligent trolley case according to claim 3, characterized in that the handle of the trolley (3) is fixedly provided with a button connected with an electromagnetic valve in the output pipe (16).

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