CN219813388U - Luggage case - Google Patents

Abstract

Embodiments of the present disclosure relate to a luggage case, including: the device comprises a first box body, a second box body and a plurality of telescopic air cylinders, wherein the telescopic air cylinders are arranged in the first box body and the second box body, the upper ends of the telescopic air cylinders are fixedly connected with the inner side of the first box body, the lower ends of the telescopic air cylinders are fixedly connected with the inner side of the second box body, the first box body moves in position under the driving of the telescopic air cylinders, one end of each telescopic air cylinder is connected with a first air pipe, and the plurality of first air pipes are communicated with a second air pipe; the air valve is arranged at one end of the second air pipe and is used for controlling the air quantity entering the first air pipe so as to adjust the telescopic height of the telescopic cylinders. In the embodiment, the first box body and the second box body or the telescopic box body are arranged, so that the box body can move or fold under the drive of the telescopic air cylinder, and the volume of the luggage can be changed; the telescopic height of the telescopic cylinder can be controlled more accurately by arranging an air valve; simple structure, convenient operation and use.

Description

Luggage case

Technical Field

The embodiment of the disclosure relates to the technical field of articles for daily use, in particular to a luggage case.

Background

Luggage is often used in our daily work and life, such as when traveling out or on business. For different luggage amounts or different riding requirements, a plurality of luggage cases with different sizes can be prepared, which brings inconvenience to the travel of people.

In the related art, some suitcases capable of changing the volume of the trunk exist, and a sliding rail, a sliding way, a push-pull rod and the like are usually required to be arranged in the trunk, so that the design is complex, and the suitcase is not very convenient to use.

Accordingly, there is a need to improve one or more problems in the related art as described above.

It is noted that this section is intended to provide a background or context for the technical solutions of the present disclosure as set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Disclosure of Invention

It is an object of embodiments of the present disclosure to provide a luggage case, which overcomes one or more of the problems due to the limitations and disadvantages of the related art, at least to some extent.

The disclosed embodiments first provide a luggage case including:

a first case;

the first box body is sleeved on the outer side of the second box body;

the telescopic cylinders are arranged in the first box body and the second box body, the upper ends of the telescopic cylinders are fixedly connected with the inner side of the first box body, the lower ends of the telescopic cylinders are fixedly connected with the inner side of the second box body, the first box body is driven by the telescopic cylinders to move in position, one end of each telescopic cylinder is connected with a first air pipe, and the first air pipes are communicated with a second air pipe; and

the air valve is arranged at one end of the second air pipe and is used for controlling the air quantity entering the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

In an embodiment of the disclosure, the number of the telescopic cylinders is four, and the telescopic cylinders are respectively arranged at four corners inside the suitcase.

In an embodiment of the present disclosure, the luggage case further includes:

the vacuum pump is communicated with the second air pipe and is used for pumping at least part of air from the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

In an embodiment of the disclosure, the luggage case further includes a handle disposed on an outer side of the first case or the second case; the luggage case is also provided with a plurality of rollers, and the rollers are arranged on the bottom surfaces of the first case body and the second case body.

In an embodiment of the disclosure, a sealing connection device is arranged between the first box body and the second box body, and the sealing connection device is hidden inside the first box body and the second box body.

The disclosed embodiments also provide a luggage case, including:

the telescopic box body is characterized in that a pair of opposite side surfaces of the telescopic box body are at least partially made of foldable soft materials;

the telescopic air cylinders are arranged inside the telescopic box body, the telescopic box body is driven by the telescopic air cylinders to fold or stretch, one end of each telescopic air cylinder is connected with a first air pipe, and a plurality of first air pipes are communicated with a second air pipe; and

the air valve is arranged at one end of the second air pipe and is used for controlling the air quantity entering the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

In an embodiment of the disclosure, the telescopic cylinder is a multi-link telescopic cylinder.

In an embodiment of the disclosure, the number of the telescopic cylinders is four, and the telescopic cylinders are respectively arranged at four corners inside the suitcase.

In an embodiment of the present disclosure, the luggage case further includes: the vacuum pump is communicated with the second air pipe and is used for pumping at least part of air from the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

In an embodiment of the disclosure, the luggage case further includes a handle, and the handle is disposed on an outer side surface of the telescopic case body; the suitcase is also provided with a plurality of idler wheels, and the idler wheels are arranged on the bottom surface of the telescopic box body.

The disclosed embodiments also provide a luggage case, including:

a first case;

the second box body is movably connected with the first box body to form a rectangular closed box body;

the four telescopic cylinders are arranged at four corners in the first box body and the second box body, one ends of the four telescopic cylinders are fixedly connected with the first box body, the other ends of the four telescopic cylinders are fixedly connected with the second box body, the first box body and the second box body move under the driving of the telescopic cylinders and change the inner volume of the rectangular closed box body, and the four telescopic cylinders are at least connected with one air valve for controlling the air quantity entering the telescopic cylinders so as to control the telescopic height of the telescopic cylinders;

the maximum height of the rectangular closed box body formed by the first box body and the second box body is equal to the maximum extension length of the telescopic cylinder, and the minimum height of the rectangular closed box body formed by the first box body and the second box body is equal to the minimum contraction length of the telescopic cylinder.

In an embodiment of the disclosure, the four telescopic cylinders are connected with an air valve through air pipes.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

according to the luggage case, the first case body and the second case body or the telescopic case body are arranged, so that the case body can move or fold under the driving of the telescopic air cylinder, the volume of the luggage case can be changed, and articles with different volumes can be contained; by arranging the air valve, the air quantity entering the first air pipe is controlled, so that the telescopic height of the telescopic cylinder can be controlled more accurately, and the telescopic state of the telescopic cylinder can be maintained; simple structure, convenient operation and use. On the other hand, as the telescopic cylinder of the luggage case is arranged in the case body, the telescopic cylinder can be effectively protected from being damaged; on the other hand, the telescopic cylinders are arranged at four corners of the box body, so that the integral supporting strength of the box body can be effectively increased; on the other hand, in the luggage case of this embodiment, the maximum height of the rectangular closed case formed by the first case and the second case is equivalent to the maximum extension length of the telescopic cylinder, and the minimum height of the rectangular closed case formed by the first case and the second case is equivalent to the minimum extension length of the telescopic cylinder, so that the larger extension range of the case can be effectively controlled by the telescopic cylinder. On the other hand, the sealing connection device is hidden in the box body, and the sealing connection device can be protected through the box body, so that the strength of the outer part of the box body is higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

FIG. 1 illustrates a schematic view of a trunk in an exemplary embodiment of the present disclosure after being stretched;

FIG. 2 illustrates a schematic view of a luggage case in an exemplary embodiment of the present disclosure after being contracted;

FIG. 3 illustrates a schematic structural view of a luggage case in yet another exemplary embodiment of the present disclosure;

FIG. 4 is a schematic view of a luggage case in yet another exemplary embodiment of the present disclosure after being extended;

FIG. 5 illustrates a schematic view of a luggage case in yet another exemplary embodiment of the present disclosure after being contracted;

FIG. 6 illustrates a schematic structural view of a luggage case in yet another exemplary embodiment of the present disclosure;

FIG. 7 illustrates a schematic structural view of a luggage case in yet another exemplary embodiment of the present disclosure;

fig. 8 is a schematic diagram illustrating communication between a plurality of telescopic cylinders according to an exemplary embodiment of the present disclosure.

Reference numerals:

100. a first case; 200. a second case; 300. a telescopic cylinder; 301. a first air tube; 302. a second air pipe; 400. an air valve; 500. a vacuum pump; 600. a handle; 700. a roller; 800. a telescopic case; 900. a box door.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

In this exemplary embodiment, first, a luggage case is provided, please refer to fig. 1-3 and fig. 7, and the luggage case may include: first casing 100, second casing 200, a plurality of telescopic cylinders 300, and air valve 400.

Specifically, the second casing 200 is sleeved on the inner side of the first casing 100. Optionally, a sealing connection device may be disposed between the first case 100 and the second case 200, and the sealing connection device is hidden inside the first case 100 and the second case 200, so that no gap exists between the two cases, and articles in the cases are prevented from falling; the sealing connection device can be protected through the box body, so that the strength of the outer part of the box body is higher; can also play a role in dust prevention, and has attractive appearance.

A plurality of the telescopic cylinders 300 are provided inside the first and second cases 100 and 200. The upper end of the telescopic cylinder 300 is fixedly connected with the inner side of the first case 100, and the lower end of the telescopic cylinder 300 is fixedly connected with the inner side of the second case 200. The first case 100 is driven by the telescopic cylinder 300 to move in position, so as to change the volume of the luggage. Referring to fig. 8, a first air pipe 301 is connected to one end of each telescopic air cylinder 300, and a plurality of first air pipes 301 are communicated with a second air pipe 302.

The air valve 400 is disposed at one end of the second air pipe 302, and the air valve 400 is used to control the amount of air entering the first air pipe 301 to adjust the telescopic height of the telescopic cylinders 300. The telescopic cylinders 300 are communicated with the second air pipes 302 through the first air pipes 301, and the second air pipes 302 are controlled by the air valves 400 to enter the air, so that the air quantity entering the first air pipes 301 is controlled by the air valves 400, and the telescopic height of the corresponding telescopic cylinders 300 is controlled.

The suitcase is used in the process: when the suitcase needs to be expanded, the air valve 400 is opened first, air enters the telescopic air cylinders 300 along the second air pipe 302 and the first air pipe 301, and the telescopic air cylinders 300 are pulled to extend, so that the telescopic air cylinders 300 can move simultaneously. When the telescopic cylinder 300 reaches the required height, the air valve 400 is closed, at this time, the air amount in the telescopic cylinder 300 is kept unchanged, the telescopic cylinder 300 does not retract, and the telescopic cylinder 300 can be fixed at the current height. When it is desired to reduce the volume of the trunk, air valve 400 is opened and then telescopic cylinder 300 is compressed, and during the compression, air in telescopic cylinder 300 is discharged from air valve 400 along second air pipe 302 and first air pipe 301. When the desired volume is reached, air valve 400 is closed, at which point the amount of air in first air tube 301 is no longer changing, and at which point telescoping cylinder 300 reaches a steady state, maintaining the current elevation.

In this embodiment, by providing the first casing 100 and the second casing 200, the first casing 100 may be moved under the driving of the telescopic cylinder 300, so that the volume of the trunk formed by the first casing 100 and the second casing 200 may be changed, and by providing the air valve 400, the telescopic height of the telescopic cylinder 300 may be more precisely controlled, and the height of the telescopic cylinder 300 may be stably supported; simple structure, convenient operation and use.

Optionally, in some embodiments, the number of the telescopic cylinders 300 is four, and the telescopic cylinders are arranged at four corners of the suitcase, so as to support the suitcase, and make the suitcase more stable and firm. In addition, four telescopic cylinders 300 are linked, and are connected in series through a first air pipe 301 and a second air pipe 302, so that the aim of synchronous lifting is fulfilled.

Optionally, in some embodiments, the luggage case further comprises: and a vacuum pump 500, wherein the vacuum pump 500 is communicated with the second air pipe 302, and the vacuum pump 500 is used for pumping at least part of air from the first air pipe 301 to adjust the telescopic heights of the telescopic cylinders 300. The vacuum pump 500 may be electrically powered, and a portable power source may be provided on the luggage for providing power to the vacuum pump 500. The vacuum pump 500 can be used for sucking the air in the first air pipe 301 to different degrees, so that the telescopic air cylinder 300 can be positioned at different heights according to the requirements. The height of the telescopic cylinder 300 can be finely adjusted by the vacuum pump 500, for example, the fine adjustment precision can reach about 1cm, and the volume of the trunk can be accurately adjusted according to the requirement.

Optionally, in some embodiments, the luggage case further includes a handle 600, where the handle 600 is disposed on an outer side surface of the first case 100 or the second case 200, and the number of handles 600 may be two, which are respectively disposed on a side surface and an upper end surface of the luggage case, so as to facilitate lifting the luggage case. The luggage case is further provided with a plurality of rollers 700, the rollers 700 may be universal wheels, and the rollers 700 are disposed on the bottom surfaces of the first case 100 and the second case 200, so that the luggage case can be conveniently moved.

Also provided in this example embodiment is a luggage case, please refer to fig. 4-7, including: telescopic case 800, telescopic cylinder 300, and air valve 400.

Specifically, the pair of opposite sides of the expansion tank 800 may be made of a foldable soft material, for example, soft cloth, or elastic rubber material, but is not limited thereto. The telescopic cylinder 300 is disposed inside the telescopic box 800, and the telescopic box 800 is folded or stretched under the driving of the telescopic cylinder 300, so that the volume of the telescopic box 800 is changed. One end of each telescopic cylinder 300 is connected with a first air pipe 301, and a plurality of first air pipes 301 are communicated with a second air pipe 302. The telescopic case 800 may include two cases, and the two cases are connected by a foldable soft material; or a box without the foldable soft material and a box with at least part of the box being the foldable soft material.

Referring to fig. 8, the air valve 400 is disposed at one end of the second air pipe 302, and the air valve 400 is used to control the amount of air flowing into the first air pipe 301 to adjust the telescopic heights of the telescopic cylinders 300.

The using process comprises the following steps: when it is desired to expand the volume of the luggage case, the air valve 400 is opened to allow air to enter the second air pipe 302 and the first air pipe 301, and the telescopic cylinder 300 is lifted to extend the telescopic case 800, thereby expanding the volume of the luggage case. When telescoping cylinder 300 reaches the desired height, air valve 400 is closed, at which time telescoping cylinder 300 may be maintained at that height without retraction. When the volume of the trunk is required to be reduced, air valve 400 is opened to start compression of telescopic cylinder 300, air in telescopic cylinder 300 is discharged through first air pipe 301, second air pipe 302 and air valve 400, and after telescopic cylinder 300 is contracted to a desired height, air valve 400 is closed, and at this time telescopic cylinder 300 is kept at the same height.

Optionally, in some embodiments, the telescopic cylinder 300 may be a multi-link telescopic cylinder 300, and may generate multi-stage telescopic operation, so that the telescopic case 800 may have different volumes, so as to facilitate storage of articles with different volume usage.

It will be appreciated that, on the basis of the above embodiments, alternatively, in some embodiments, the number of the cylinders is four, and the cylinders are disposed at four corners of the bellows 800. The four telescopic cylinders 300 in the telescopic box 800 are communicated, and can synchronously realize ascending or descending.

In this embodiment, the telescopic cylinder 300 is disposed inside the telescopic box 800, so that the telescopic cylinder 300 can be effectively protected from being damaged, in addition, the telescopic cylinder 300 is disposed at four corners of the telescopic box 800, so that the telescopic box 800 can be comprehensively supported, especially, the box of the part of the foldable soft material is effectively supported, no matter whether the foldable soft material is in a folded state or an extended state, the telescopic cylinder 300 can be supported, and the whole shape of the telescopic box 800 can be supported, so that the whole strength of the telescopic box 800 in any volume state is relatively high, and collapse can not occur.

In addition, the luggage case may further include: a vacuum pump 500. The vacuum pump 500 is in communication with the second air pipe 302, and the vacuum pump 500 is configured to perform at least partial air extraction on the first air pipe 301 to adjust the telescopic heights of the telescopic cylinders 300. When the telescopic cylinder 300 is vacuumized using the vacuum pump 500, the air valve 400 is in a closed state. The first air tube 301 may be evacuated to varying degrees by the vacuum pump 500 according to the volume of the trunk, so that the telescopic cylinder 300 may be at a desired height.

Also, optionally, in some embodiments, the luggage case further includes a handle 600, where the handle 600 is disposed on an outer side surface of the telescopic case 800, and the number of handles 600 may be two, which are respectively disposed on a side surface and a top surface of the telescopic case 800, so as to facilitate lifting the luggage case. The luggage case is further provided with a plurality of rollers 700, which may be universal wheels, for example, the rollers 700 being provided on the bottom surface of the telescopic case 800 for moving the luggage case.

Also provided in this example embodiment is a luggage case, please refer to fig. 1-3 and fig. 8, which may include: first casing 100, second casing 200, and four telescopic cylinders 300.

Specifically, the second case 200 and the first case 100 are movably connected to form a rectangular closed case.

The four telescopic cylinders 300 are disposed at four corners inside the first case 100 and the second case 200, one ends of the four telescopic cylinders 300 are fixedly connected with the first case 100, and the other ends of the four telescopic cylinders are fixedly connected with the second case 200. The first and second cases 100 and 200 are moved by the telescopic cylinder 300 and change the inner volume of the rectangular closed case. The four telescopic cylinders 300 are connected to at least one air valve 400 for controlling the amount of air entering the telescopic cylinders 300 to control the telescopic height of the telescopic cylinders 300. The maximum height of the rectangular closed box formed by the first box 100 and the second box 200 is equal to the maximum extension length of the telescopic cylinder 300, the minimum height of the rectangular closed box formed by the first box 100 and the second box 200 is equal to the minimum contraction length of the telescopic cylinder 300, and the telescopic cylinder 300 is used for effectively controlling the larger telescopic range of the box.

In this embodiment, the telescopic cylinder 300 is disposed inside the first case 100 and the second case 200, so that the telescopic cylinder 300 can be effectively protected from being damaged; the telescopic cylinders 300 are provided at four corners of the first and second cases 100 and 200, and can effectively increase the overall supporting strength of the cases.

When the telescopic height of the telescopic cylinder 300 needs to be adjusted, the air valve 400 needs to be opened to enable the air in the telescopic cylinder 300 to be communicated with the outside, and then the telescopic cylinder 300 stretches, so that the telescopic cylinder 300 saves labor when stretching. When the telescopic cylinder 300 is telescopic to a required height, the air valve 400 is closed, at this time, the amount of air in the telescopic cylinder 300 is fixed, the telescopic cylinder 300 does not continue to stretch and retract, and the telescopic cylinder 300 is kept at the height, so that the volume of the luggage case is quite stable. The number of air valves 400 may be one or four, for example, one air valve 400 may be connected to each telescopic cylinder 300, and when the height of a telescopic cylinder 300 is not ideal, a certain air valve 400 may be opened individually to adjust the height of the telescopic cylinder 300.

Alternatively, in some embodiments, the four telescoping cylinders 300 are connected to the air valve 400 via air lines. The air valve 400 feeds air into the telescopic cylinder 300 through an air pipe, and as such, the air in the telescopic cylinder 300 can be discharged from the air valve 400 through the air pipe.

In the above embodiments, optionally, a mobile power source may be disposed on each trunk for providing power to the vacuum pump 500, so that the vacuum pump 500 is an electric vacuum pump 500. The mobile power supply may also function as a battery charging power supply for a mobile phone.

In addition, the luggage case in the above embodiment may be further provided with a case door 900, so that the luggage case is conveniently opened to take and put articles; a pull rod can be arranged, so that the suitcase is convenient to pull.

It should be noted that, the suitcase according to the present utility model may be stretched to a smaller volume under the driving of the stretching cylinder 300, for example, the height of the entire suitcase in the direction of the stretching cylinder 300 may reach about 30 cm. Moreover, the luggage case is reasonable in design, easy to process and easy to popularize in the market.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the embodiments of the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In the presently disclosed embodiments, unless expressly stated and limited otherwise, 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 not being in direct contact but being in contact through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A luggage case, characterized in that the luggage case comprises:

a first case;

the second box body is sleeved on the inner side of the first box body;

the telescopic cylinders are arranged in the first box body and the second box body, the upper ends of the telescopic cylinders are fixedly connected with the inner side of the first box body, the lower ends of the telescopic cylinders are fixedly connected with the inner side of the second box body, the first box body is driven by the telescopic cylinders to move in position, one end of each telescopic cylinder is connected with a first air pipe, and the first air pipes are communicated with a second air pipe; and

the air valve is arranged at one end of the second air pipe and is used for controlling the air quantity entering the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

2. The luggage case according to claim 1, wherein the number of telescopic cylinders is four, and the telescopic cylinders are respectively arranged at four corners of the interior of the luggage case.

3. The luggage case of claim 1, further comprising:

the vacuum pump is communicated with the second air pipe and is used for pumping at least part of air from the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

4. The luggage case of claim 1, wherein a sealing connection device is provided between the first case and the second case, and the sealing connection device is hidden inside the first case and the second case.

5. A luggage case, characterized in that the luggage case comprises:

the telescopic box body is characterized in that a pair of opposite side surfaces of the telescopic box body are at least partially made of foldable soft materials;

the telescopic air cylinders are arranged inside the telescopic box body, the telescopic box body is driven by the telescopic air cylinders to fold or stretch, one end of each telescopic air cylinder is connected with a first air pipe, and a plurality of first air pipes are communicated with a second air pipe; and

the air valve is arranged at one end of the second air pipe and is used for controlling the air quantity entering the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

6. The luggage of claim 5, wherein said telescoping cylinder is a multi-link telescoping cylinder.

7. The luggage of claim 5, wherein the number of telescopic cylinders is four, each arranged at four corners of the interior of the luggage.

8. The luggage case of claim 5, further comprising: the vacuum pump is communicated with the second air pipe and is used for pumping at least part of air from the first air pipe so as to adjust the telescopic heights of the telescopic cylinders.

9. A luggage case, characterized in that the luggage case comprises:

a first case;

the second box body is movably connected with the first box body to form a rectangular closed box body;

the four telescopic cylinders are arranged at four corners in the first box body and the second box body, one ends of the four telescopic cylinders are fixedly connected with the first box body, the other ends of the four telescopic cylinders are fixedly connected with the second box body, the first box body and the second box body move under the driving of the telescopic cylinders and change the inner volume of the rectangular closed box body, and the four telescopic cylinders are at least connected with one air valve for controlling the air quantity entering the telescopic cylinders so as to control the telescopic height of the telescopic cylinders;

the maximum height of the rectangular closed box body formed by the first box body and the second box body is equal to the maximum extension length of the telescopic cylinder, and the minimum height of the rectangular closed box body formed by the first box body and the second box body is equal to the minimum contraction length of the telescopic cylinder.

10. The luggage case of claim 9, wherein the four telescoping cylinders are connected to an air valve via air lines.