Luggage case

Abstract

The utility model relates to the technical field of luggage cases, in particular to a luggage case. The luggage case provided by the utility model comprises a case body and a universal wheel assembly, the universal wheel assemblies comprise fixed universal wheel assemblies and swing universal wheel assemblies, the fixed universal wheel assemblies are arranged at the four corners of the bottom of the box body, and the swing universal wheel assemblies are arranged on at least one side edge of the bottom of the box body; the swinging universal wheel assembly has a first state that the swinging universal wheel assembly droops to the bottom of the box body and is lower than the fixed universal wheel assembly and a second state that the swinging universal wheel assembly extends towards the outer side of the box body and is flush with the fixed universal wheel assembly through swinging; or, the universal wheel assemblies comprise swing universal wheel assemblies, and the swing universal wheel assemblies are arranged at the four corners of the bottom of the box body. The swing universal wheel assembly does not occupy the containing space in the box body, the appearance, storage, boarding or consignment of the box body are not affected, the bottom width of the box body can meet the boarding requirement, meanwhile, the stability of the box body is high, and a child is not prone to turning over when sitting on the box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of luggage, especially to a luggage. BACKGROUND

[0002] Most of the wheels of the luggage on the market are directly fixed and installed at four corner positions of the bottom of the box body, and the width of the bottom of the box body determines the size of the contact area of the wheels with the ground, and the bottom width of the box body of the child seat luggage on the market is much larger than that of the ordinary luggage for safety and stability, so as to increase the ground contact area of the bottom of the box body and improve the safety and stability of the box, so as to prevent the box from being easily overturned when a child sits on it.

[0003] However, the size of the luggage that can be carried on board is strictly limited, and the length, width and height of the luggage must be within the standard range, which makes most of the child seat luggage on the market with a wider box body not meet the size requirements and cannot be carried on board, bringing more inconvenience to families with children. SUMMARY

[0004] The utility model aims to provide a luggage to solve the technical problem that the bottom of the box body is too wide to meet the boarding requirements and the narrower stability is poor and the child is easily overturned when sitting on it in the prior art.

[0005] In a first aspect, the utility model provides a luggage, comprising: a box body and a universal wheel assembly.

[0006] The universal wheel assembly comprises a fixed universal wheel assembly and a swing universal wheel assembly, the four corners of the bottom of the box body are each provided with the fixed universal wheel assembly, at least one side of the bottom of the box body is provided with the swing universal wheel assembly, the swing universal wheel assembly has a first state of drooping to the bottom of the box body and being lower than the fixed universal wheel assembly and a second state of extending outward of the box body and being flush with the fixed universal wheel assembly through swinging, and when the swing universal wheel assembly is in the second state, the swing universal wheel assembly is used for supporting the box body together with the fixed universal wheel assembly.

[0007] Alternatively, the universal wheel assembly comprises a swing universal wheel assembly, the four corners of the bottom of the box body are each provided with the swing universal wheel assembly, the swing universal wheel assembly has a first state of drooping to the bottom of the box body and a second state of extending outward of the box body through swinging, and when the swing universal wheel assembly is in the second state, the swing universal wheel assembly is used for supporting the box body.

[0008] In an optional embodiment, the swing universal wheel assembly comprises a wheel seat, a support, a connecting rod and a wheel.

[0009] The wheel seat is connected to the bottom of the box body, one end of the connecting rod is rotationally connected to the wheel seat so that the connecting rod can swing relative to the wheel seat, and the other end of the connecting rod is rotationally connected to the support so that the support can rotate at any angle relative to the connecting rod, and the wheel is fixed to the support.

[0010] In an optional embodiment, a limiting slot is arranged on the wheel seat, and the connecting rod is rotationally connected in the limiting slot.

[0011] The limiting slot has a first inner wall and a second inner wall, the connecting rod forms the first state when being rotationally abutted against the first inner wall, and the connecting rod forms the second state when being rotationally abutted against the second inner wall.

[0012] In an optional embodiment, the limiting slot is a V-shaped slot, and the connecting rod is rotationally connected to the bottom of the limiting slot.

[0013] In an optional embodiment, the swing universal wheel assembly further comprises a reset structure for making the swing universal wheel assembly in the first state.

[0014] In an optional embodiment, the reset structure comprises a first magnetic attraction member arranged on the connecting rod and a second magnetic attraction member arranged on the first inner wall in magnetic attraction cooperation.

[0015] The connecting rod is provided with a first mounting slot, and the first magnetic attraction member is arranged in the first mounting slot.

[0016] The first inner wall is provided with a second mounting slot, and the second magnetic attraction member is arranged in the second mounting slot.

[0017] In an optional embodiment, when the universal wheel assembly comprises a fixed universal wheel assembly and a swing universal wheel assembly, the four corners of the bottom of the box body are provided with the fixed universal wheel assembly, the front side and the rear side of the bottom of the box body are provided with the swing universal wheel assembly, and the swing universal wheel assembly is equidistant from the fixed universal wheel assemblies on the left and right sides.

[0018] In an optional embodiment, when the universal wheel assembly comprises a swing universal wheel assembly, the four corners of the bottom of the box body are provided with the swing universal wheel assembly, the universal wheel assembly further comprises a fixed universal wheel assembly, and the bottom of the box body is provided with at least one fixed universal wheel assembly.

[0019] In an optional embodiment, the top of the box body is provided with a seat backrest.

[0020] The seat backrest is rotationally connected to the top of the box body and can be buckled on the top surface of the box body by rotation.

[0021] Or, the seat back is rotatably connected to the opposite sides of the box body and can be buckled on the rear side of the box body by rotation.

[0022] In an optional embodiment, the seat back is rotatably connected to the opposite sides of the box body, and the lower end of the seat back can abut against the top front side of the box body when the seat back is unfolded relative to the rear side of the box body.

[0023] Compared with the prior art, the luggage case provided by the utility model has the following technical advantages:

[0024] The luggage case provided by the utility model comprises a box body and a universal wheel assembly; the universal wheel assembly comprises a fixed universal wheel assembly and a swing universal wheel assembly; the four corners of the bottom of the box body are each provided with the fixed universal wheel assembly; at least one side edge of the bottom of the box body is provided with the swing universal wheel assembly; the swing universal wheel assembly has a first state of drooping to the bottom of the box body and being lower than the fixed universal wheel assembly and a second state of extending to the outside of the box body and being flush with the fixed universal wheel assembly by swinging; and the swing universal wheel assembly is used for supporting the box body together with the fixed universal wheel assembly when the swing universal wheel assembly is in the second state; or the universal wheel assembly comprises the swing universal wheel assembly; the four corners of the bottom of the box body are each provided with the swing universal wheel assembly; the swing universal wheel assembly has the first state of drooping to the bottom of the box body and the second state of extending to the outside of the box body; and the swing universal wheel assembly is used for supporting the box body when the swing universal wheel assembly is in the second state.

[0025] By installing the fixed universal wheel assembly and the swing universal wheel assembly on the bottom of the box body, when the box body is off the ground, the swing universal wheel assembly can automatically droop to the bottom of the box body and be lower than the fixed universal wheel assembly, that is, the swing universal wheel assembly is in the first state; when the box body is placed on the ground, the swing universal wheel assembly first contacts the ground and then swings to the outside of the box body and extends until flush with the fixed universal wheel assembly, that is, the swing universal wheel assembly is in the second state; at this time, the swing universal wheel assembly and the fixed universal wheel assembly support the box body together, and the contact area of the box body with the ground is expanded; the use is very convenient; the swing universal wheel assembly does not occupy the accommodation space in the box body, does not affect the appearance, storage, boarding or shipping of the box body, the width of the bottom of the box body can meet the boarding requirement, and the box body has high stability and is not prone to falling over when a child sits on the box body.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 The structure schematic view of the box body bottom central fixed universal wheel assembly four corners swing universal wheel assembly and the swing universal wheel assembly in the second state is provided for the embodiment of the present application.

[0029] Figure 2 The structure schematic view of the box body bottom central fixed universal wheel assembly four corners swing universal wheel assembly and the swing universal wheel assembly in the first state is provided for the embodiment of the present application.

[0030] Figure 3 The structure schematic view of the box body bottom central fixed universal wheel assembly four corners swing universal wheel assembly is provided for the embodiment of the present application.

[0031] Figure 4 The structure schematic view of the box body bottom four corners fixed universal wheel assembly side swing universal wheel assembly and the swing universal wheel assembly in the second state is provided for the embodiment of the present application.

[0032] Figure 5 The structure schematic view of the box body bottom four corners fixed universal wheel assembly side swing universal wheel assembly and the swing universal wheel assembly in the first state is provided for the embodiment of the present application.

[0033] Figure 6 The structure schematic view of the swing universal wheel assembly in the second state is provided for the embodiment of the present application.

[0034] Figure 7 The side view of the swing universal wheel assembly in the second state is provided for the embodiment of the present application.

[0035] Figure 8 The structure schematic view of the swing universal wheel assembly in the first state is provided for the embodiment of the present application.

[0036] Figure 9 The side view of the swing universal wheel assembly in the first state is provided for the embodiment of the present application.

[0037] Figure icon: 1 - box; 2 - fixed universal wheel assembly; 3 - swing universal wheel assembly; 4 - wheel seat; 5 - support; 6 - connecting rod; 7 - wheel; 8 - limiting groove; 9 - first inner wall; 10 - second inner wall; 11 - first magnetic attraction piece; 12 - second magnetic attraction piece; 13 - seat backrest. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0042] The present application will be described in further detail below through specific examples and in conjunction with the drawings.

[0043] The specific structure is shown in Figures 1 to 9 .

[0044] The embodiment provides a luggage case, which comprises a case body 1 and a universal wheel assembly; the universal wheel assembly comprises a fixed universal wheel assembly 2 and a swing universal wheel assembly 3; the four corners of the bottom of the case body 1 are provided with the fixed universal wheel assembly 2; at least one side of the bottom of the case body 1 is provided with the swing universal wheel assembly 3; the swing universal wheel assembly 3 swings between a first state of hanging down to the bottom of the case body 1 and being lower than the fixed universal wheel assembly 2 and a second state of extending to the outside of the case body 1 and being flush with the fixed universal wheel assembly 2; when the swing universal wheel assembly 3 is in the second state, the swing universal wheel assembly 3 is used for supporting the case body 1 together with the fixed universal wheel assembly 2; or the universal wheel assembly comprises the swing universal wheel assembly 3; the four corners of the bottom of the case body 1 are provided with the swing universal wheel assembly 3; the swing universal wheel assembly 3 swings between the first state of hanging down to the bottom of the case body 1 and the second state of extending to the outside of the case body 1; when the swing universal wheel assembly 3 is in the second state, the swing universal wheel assembly 3 is used for supporting the case body 1.

[0045] In the embodiment, the fixed universal wheel assembly 2 and the swing universal wheel assembly 3 are installed on the bottom of the case body 1; when the case body 1 is lifted from the ground, the swing universal wheel assembly 3 can automatically hang down to the bottom of the case body 1 and be lower than the fixed universal wheel assembly 2, that is, the swing universal wheel assembly 3 is in the first state; when the case body 1 is placed on the ground, the swing universal wheel assembly 3 first contacts the ground and then swings to the outside of the case body 1 and extends until being flush with the fixed universal wheel assembly 2, that is, the swing universal wheel assembly 3 is in the second state; at this time, the swing universal wheel assembly 3 supports the case body 1 together with the fixed universal wheel assembly 2, and the contact area between the case body 1 and the ground is expanded; the use is very convenient; the swing universal wheel assembly 3 does not occupy the containing space in the case body 1, does not affect the appearance, storage, boarding or shipping of the case body 1, the width of the bottom of the case body 1 can meet the boarding requirement, and the case body 1 has high stability and is not easy to be overturned when a child sits on the case body 1. Alternatively, the swing universal wheel assembly 3 is installed on the bottom of the case body 1; when the case body 1 is lifted from the ground, the swing universal wheel assembly 3 can automatically hang down to the bottom of the case body 1, that is, the swing universal wheel assembly 3 is in the first state; when the case body 1 is placed on the ground, the swing universal wheel assembly 3 first contacts the ground and then swings to the outside of the case body 1 and extends, that is, the swing universal wheel assembly 3 is in the second state; at this time, the swing universal wheel assembly 3 supports the case body 1, and the same effect as above is achieved.

[0046] In the optional technical solution of the embodiment, the swing universal wheel assembly 3 comprises a wheel seat 4, a support 5, a connecting rod 6 and a wheel 7; the wheel seat 4 is connected to the bottom of the case body 1; one end of the connecting rod 6 is rotationally connected to the wheel seat 4, so that the connecting rod 6 can swing relative to the wheel seat 4; the other end of the connecting rod 6 is rotationally connected to the support 5, so that the support 5 can rotate at any angle relative to the connecting rod 6; and the wheel 7 is fixed to the support 5. The swing universal wheel assembly 3 has simple structure and is convenient to install.

[0047] The embodiment is not limited to this, and the swing universal wheel assembly 3 can also only include the support 5, the connecting rod 6 and the wheel 7, wherein the connecting rod 6 is directly rotationally connected to the bottom of the box body 1, and the connecting mode between the support 5, the connecting rod 6 and the wheel 7 is the same as described above.

[0048] In an optional technical solution of the embodiment, the wheel seat 4 is provided with a limiting groove 8, and the connecting rod 6 is rotationally connected in the limiting groove 8; the limiting groove 8 has a first inner wall 9 and a second inner wall 10, the connecting rod 6 forms a first state when being abutted against the first inner wall 9 by rotation, and the connecting rod 6 forms a second state when being abutted against the second inner wall 10 by rotation.

[0049] In the embodiment, in order to limit the swing angle of the connecting rod 6, a limiting structure can be arranged, which can be arranged on the wheel seat 4 or the box body 1, wherein the limiting structure can be a pair of limiting rods or a pair of limiting blocks, etc., as long as the requirements are met. Preferably, the limiting structure is the limiting groove 8, and the limiting groove 8 is arranged on the wheel seat 4, the connecting rod 6 can be accommodated in the limiting groove 8, and the connecting rod 6 can be abutted against the first inner wall 9 to form the first state and the second inner wall 10 to form the second state by rotation, which is simple in structure and good in limiting effect.

[0050] In an optional technical solution of the embodiment, the limiting groove 8 is a V-shaped groove, and the connecting rod 6 is rotationally connected to the groove bottom of the limiting groove 8. In the first state, the first inner wall 9 can be abutted against the connecting rod 6 entirely, the contact area is large, the connecting rod 6 is balanced in force to avoid damage, and the first state is stable at the same time; in the second state, the second inner wall 10 can be abutted against the connecting rod 6 entirely, the contact area is large, the connecting rod 6 is balanced in force to avoid damage, and the second state is stable at the same time.

[0051] In an optional technical solution of the embodiment, the swing universal wheel assembly 3 further includes a reset structure, which is used to make the swing universal wheel assembly 3 in the first state. After the box body 1 is lifted off the ground by the reset structure, the swing universal wheel assembly 3 can automatically recover from the second state to the first state, so that the swing universal wheel assembly 3 can stably be in the first state after the box body 1 is lifted off the ground.

[0052] In an optional technical solution of the embodiment, the reset structure includes a first magnetic attraction piece 11 arranged on the connecting rod 6 and a second magnetic attraction piece 12 arranged on the first inner wall 9 and magnetically attracted to each other; the connecting rod 6 is provided with a first mounting groove, and the first magnetic attraction piece 11 is arranged in the first mounting groove; the first inner wall 9 is provided with a second mounting groove, and the second magnetic attraction piece 12 is arranged in the second mounting groove. The reset structure is simple, and the reset function is realized by magnetic attraction, which is stable in reset effect. Among them, the first magnetic attraction piece 11 can be a magnet, and the second magnetic attraction piece 12 can be a metal piece; the first magnetic attraction piece 11 can also be a metal piece, and the second magnetic attraction piece 12 can be a magnet; or the first magnetic attraction piece 11 and the second magnetic attraction piece 12 can both be magnets.

[0053] The embodiment is not limited to this, and the reset structure can also be a torsion spring arranged on a rotating shaft connected with the connecting rod 6 and the limiting groove 8.

[0054] In the optional technical scheme of the embodiment, when the universal wheel assembly includes the fixed universal wheel assembly 2 and the swing universal wheel assembly 3, the four corners of the bottom of the box body 1 are provided with the fixed universal wheel assembly 2, the front side and the rear side of the bottom of the box body 1 are provided with the swing universal wheel assembly 3, and the swing universal wheel assembly 3 is equidistant from the fixed universal wheel assemblies 2 on the left and right sides.

[0055] In the embodiment, the fixed universal wheel assembly 2 is installed at the four corners of the bottom of the box body 1, and the swing universal wheel assembly 3 is installed at the middle positions of the front side and the rear side of the bottom of the box body 1, so that the stability of the box body 1 after falling to the ground is high.

[0056] The embodiment is not limited to this, and the four side edges of the bottom of the box body 1 can also be provided with the swing universal wheel assembly 3, and the swing universal wheel assembly 3 is equidistant from the fixed universal wheel assemblies 2 on the adjacent two sides. The swing universal wheel assembly 3 can also be arranged on any one or three of the four side edges of the bottom of the box body 1.

[0057] In the optional technical scheme of the embodiment, when the universal wheel assembly includes the swing universal wheel assembly 3, the four corners of the bottom of the box body 1 are provided with the swing universal wheel assembly 3, the universal wheel assembly further includes the fixed universal wheel assembly 2, and the bottom of the box body 1 is provided with at least one fixed universal wheel assembly 2. Preferably, the bottom of the box body 1 is provided with one fixed universal wheel assembly 2, and the fixed universal wheel assembly 2 is equidistant from the four swing universal wheel assemblies 3.

[0058] In the embodiment, the swing universal wheel assembly 3 is installed at the four corners of the bottom of the box body 1, and the fixed universal wheel assembly 2 is installed at the central position of the bottom of the box body 1, so that the stability of the box body 1 after falling to the ground is high.

[0059] The embodiment is not limited to this, and the fixed universal wheel assembly 2 can also be arranged on any one, two, three or four of the four side edges of the bottom of the box body 1.

[0060] In the optional technical scheme of the embodiment, the top of the box body 1 is provided with a seat back 13; the seat back 13 is rotationally connected to the top of the box body 1 and can be buckled on the top surface of the box body 1 through rotation; or, the seat back 13 is rotationally connected to the opposite sides of the box body 1 and can be buckled on the rear side surface of the box body 1 through rotation. The arrangement of the seat back 13 makes it convenient for a child to lean when sitting on the top of the box body 1, improves comfort, and avoids falling of the child.

[0061] In the optional technical scheme of the embodiment, the seat backrest 13 is rotatably connected to the opposite sides of the box body 1, and when the seat backrest 13 is unfolded relative to the rear side of the box body 1, the lower end of the seat backrest 13 can abut against the top front side of the box body 1. When the child leans against the seat backrest 13, the stability is high because the lower end of the seat backrest 13 abuts against the top front side of the box body 1.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A luggage case characterized by, The utility model relates to a kind of box and universal wheel assemblies comprising: The universal wheel assembly includes fixed universal wheel assembly (2) and swing universal wheel assembly (3), four corners of the bottom of the box (1) are provided with the fixed universal wheel assembly (2), and at least one side of the bottom of the box (1) is provided with the swing universal wheel assembly (3), the swing universal wheel assembly (3) is by swing with the first state of being lowered to the bottom of the box (1) and being lower than the fixed universal wheel assembly (2) and the second state of being stretched to the outside of the box (1) and being flush with the fixed universal wheel assembly (2), and when the swing universal wheel assembly (3) is in the second state, the swing universal wheel assembly (3) is used to support the box (1) with the fixed universal wheel assembly (2). Or, the universal wheel assembly includes swing universal wheel assembly (3), four corners of the bottom of the box (1) are provided with the swing universal wheel assembly (3), and the swing universal wheel assembly (3) is by swing with the first state of being lowered to the bottom of the box (1) and the second state of being stretched to the outside of the box (1), and when the swing universal wheel assembly (3) is in the second state, the swing universal wheel assembly (3) is used to support the box (1). The swing universal wheel assembly (3) includes wheel seat (4), support (5), connecting rod (6) and wheel (7); 2. The luggage case of claim 1, wherein, The wheel seat (4) is connected to the bottom of the box (1), one end of the connecting rod (6) is rotatably connected to the wheel seat (4), so that the connecting rod (6) can swing relative to the wheel seat (4), the other end of the connecting rod (6) is rotatably connected to the support (5), so that the support (5) can rotate at any angle relative to the connecting rod (6), and the wheel (7) is fixed to the support (5). A limiting groove (8) is provided on the wheel seat (4), and the connecting rod (6) is rotatably connected in the limiting groove (8); 3. The luggage case of claim 2, wherein, The limiting groove (8) has a first inner wall (9) and a second inner wall (10), the first state is formed when the connecting rod (6) is abutted against the first inner wall (9) by rotating, and the second state is formed when the connecting rod (6) is abutted against the second inner wall (10) by rotating. The limiting groove (8) is a V-shaped groove, and the connecting rod (6) is rotatably connected to the groove bottom of the limiting groove (8).

4. The luggage case of claim 3, wherein, The swing universal wheel assembly (3) further includes a reset structure for making the swing universal wheel assembly (3) in the first state.

5. The luggage case of claim 3, wherein, The reset structure includes a first magnetic attraction member (11) provided on the connecting rod (6) and a second magnetic attraction member (12) provided on the first inner wall (9) in magnetic attraction cooperation respectively; 6. The luggage case of claim 5, wherein, A first mounting groove is provided on the connecting rod (6), and the first magnetic attraction member (11) is arranged in the first mounting groove; A second mounting groove is provided on the first inner wall (9), and the second magnetic attraction member (12) is arranged in the second mounting groove. ​ 7. The luggage case of any of claims 1-6, wherein, When the universal wheel assembly comprises the fixed universal wheel assembly (2) and the swing universal wheel assembly (3), the four corners of the bottom of the box body (1) are provided with the fixed universal wheel assembly (2), the front side and the rear side of the bottom of the box body (1) are provided with the swing universal wheel assembly (3), and the swing universal wheel assembly (3) is equidistant from the fixed universal wheel assemblies (2) on the left and right sides.

8. The luggage case of any of claims 1-6, wherein, When the universal wheel assembly comprises the swing universal wheel assembly (3), the four corners of the bottom of the box body (1) are provided with the swing universal wheel assembly (3), the universal wheel assembly further comprises the fixed universal wheel assembly (2), and the bottom of the box body (1) is provided with at least one fixed universal wheel assembly (2).

9. The luggage case of any of claims 1-6, wherein, The top of the box body (1) is provided with a seat backrest (13); The seat backrest (13) is rotatably connected to the top of the box body (1) and can be buckled on the top surface of the box body (1) by rotation; Or, the seat backrest (13) is rotatably connected to the opposite sides of the box body (1) and can be buckled on the rear side of the box body (1) by rotation.

10. The luggage case of claim 9, wherein, The seat backrest (13) is rotatably connected to the opposite sides of the box body (1), and when the seat backrest (13) is unfolded relative to the rear side of the box body (1), the lower end of the seat backrest (13) can abut against the top front side of the box body (1).

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