Idler wheel structure of luggage case

Abstract

The utility model discloses an idler wheel structure of a luggage case, which comprises an idler wheel body, the idler wheel body comprises an assembly part and a wheel assembly which are matched with a case body, the assembly part is provided with an extension part, the end face of the extension part deviates from the longitudinal axis of the assembly part, and the wheel assembly is rotatably connected with the end part of the extension part. The roller assembly has the advantages that the roller assembly is simple and reasonable in structure, the wheel deviates from the longitudinal axis of the whole roller assembly due to the arrangement of the extending part deviating from the longitudinal axis of the assembling part, and therefore when the roller assembly is installed on a box body, the wheel part can extend outwards to increase the area defined by contact points of the wheel and a contact surface, and the service life of the roller assembly is prolonged. The stability of the luggage case during pushing is improved by increasing contact projection.

Description

Technical Field

[0001] The utility model relates to the technical field of luggage case manufacturing, in particular to a roller structure of a luggage case. Background Art

[0002] A suitcase is a container used to store clothing when traveling. It's typically equipped with wheels and a retractable handle to facilitate towing. Traveling with children often involves juggling the hassle of dragging the suitcase and caring for the child. To address this issue, some luggage manufacturers have improved the structure of the suitcase, transforming it into a removable seat for children.

[0003] For example, the patent application with application number CN202222444263.4 and titled "A Multifunctional Suitcase" discloses a suitcase, which includes a box body and a backrest board, the backrest board is movably connected to the box body by a connecting piece, the backrest board and the box body have a folded state and an unfolded state, the folded state and the unfolded state of the backrest board and the box body are switched with each other by rotating the connecting piece, the backrest board and the box body are movably connected by the connecting piece, and the backrest board can be turned over and used as a storage rack. When carrying luggage during travel, we can place items on the suitcase, because the items are blocked by the backrest board, so the items will not fall during transportation; at the same time, the backrest board can also be used as a backrest for children to prevent them from falling backwards. To improve the stability of the suitcase during movement, the suitcase adopts a structure with a small top and a large bottom to lower the center of gravity of the suitcase and reduce the possibility of the suitcase tipping over during movement. The bottom of the suitcase adopts ordinary universal wheels, which are set at the bottom of the suitcase. However, the small top and large bottom structure makes the suitcase irregular, increasing the processing difficulty. The internal space also becomes irregular, which to some extent affects the orderly storage of items. Therefore, its structure needs further improvement. Utility Model Content

[0004] The purpose of the present utility model is to remedy the above-mentioned deficiencies and to disclose to the public a roller structure for a suitcase which has a simple and reasonable structure and can increase the stability of the suitcase when pushed.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A roller structure for a suitcase includes a roller body, wherein the roller body includes an assembly portion adapted to the suitcase body and a wheel assembly, the assembly portion is provided with an extension portion whose end face deviates from the longitudinal axis of the assembly portion, and the wheel assembly is rotatably connected to the end of the extension portion.

[0007] The measures to further optimize this technical solution are:

[0008] As an improvement, the extension portion is a tapered structure that is larger at the top and smaller at the bottom. This arrangement can increase the contact area between the box body and the assembly portion and improve the reliability of the support.

[0009] As an improvement, the extension portion extends outward and downward so that the end surface of the extension portion is arranged horizontally. This arrangement can make the wheels extend outward as much as possible to increase the spacing between the wheels and improve the stability during pushing.

[0010] As an improvement, the assembly portion includes a top surface and two side surfaces, and the top surfaces and the side surfaces are both arc transitions. The arc transition can improve the integrity and smoothness of the surface.

[0011] As an improvement, the top surface is arranged horizontally and the side surface is arranged vertically.

[0012] As an improvement, the two side surfaces are perpendicular to each other.

[0013] As an improvement, the top surface is a fan-shaped structure.

[0014] The assembly portion is configured in this way so as to better fit with the four corners of the bottom surface of the luggage box.

[0015] As an improvement, the wheel assembly includes a base, and wheels are respectively provided on both sides of the base.

[0016] As an improvement, the assembly portion and the extension portion are formed as an integral structure, which is easy to process.

[0017] As an improvement, the assembly portion is a solid structure, which can improve the strength of the assembly portion.

[0018] The advantages of this utility model compared with the prior art are:

[0019] The utility model provides a simple and rational roller structure for a suitcase. By providing an extension portion that deviates from the longitudinal axis of the assembly portion, the wheel is deviated from the longitudinal axis of the entire roller assembly. Thus, when the roller assembly is mounted on the suitcase, the wheel portion extends outward, thereby increasing the area enclosed by the contact points between the wheel and the contact surface. By increasing the contact projection, the stability of the suitcase during pushing is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of an embodiment of the utility model;

[0021] Figure 2 This is a front view of an embodiment of the utility model;

[0022] Figure 3 It is a top view of an embodiment of the utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the utility model after the roller is installed on the suitcase;

[0024] Figure 5 This is a top view of the utility model after the roller is installed on the suitcase.

[0025] The names of the reference numerals in the accompanying drawings of the present utility model are:

[0026] Box body 1 , assembly portion 2 , top surface 2 a , side surface 2 b , extension portion 21 , end surface 21 a , wheel assembly 3 , base 31 , and wheels 32 . DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings:

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] like Figures 1 to 3 As shown, a roller structure for a suitcase includes a roller body, wherein the roller body includes an assembly portion 2 adapted to the case body 1 and a wheel assembly 3, wherein the assembly portion 2 is provided with an extension portion 21 whose end surface 21a deviates from the longitudinal axis of the assembly portion 2, and the wheel assembly 3 is rotatably connected to the end of the extension portion 21.

[0032] The extension portion 21 is a tapered structure that is larger at the top and smaller at the bottom. That is, the extension portion 21 is larger at the top and smaller at the bottom. Accordingly, the projected area of ​​the assembly portion 2 is larger than the projected area of ​​the wheel assembly 3. This arrangement increases the contact area between the housing 1 and the assembly portion 2, improving the reliability of the connection support.

[0033] The extension 21 extends outward and downward, so that the end surface 21a of the extension 21 is horizontally arranged. In this way, the wheel 32 is aligned with the longitudinal axis while the end surface 21a of the extension 21 is horizontal, which facilitates the assembly of the wheel assembly 3.

[0034] The assembly portion 2 includes a top surface 2a and two side surfaces 2b. There are arc transitions between the top surfaces 2a and between the top surfaces 2a and the side surfaces 2b.

[0035] The top surface 2a is arranged horizontally, and the side surface 2b is arranged vertically.

[0036] The two side surfaces 2b are perpendicular to each other.

[0037] The top surface 2a is a fan-shaped structure.

[0038] The surface of the assembly portion 2 includes a horizontal top surface 2a and two vertical side surfaces 2b. The top surface 2a is fan-shaped, and the two vertical side surfaces 2b are perpendicular to each other, forming a contact surface composed of three surfaces. Furthermore, a circular arc transition is used between the two side surfaces 2b, and a circular arc transition is also used between the top surface 2a and the side surfaces 2b. This creates a spherical structure at the intersection of the three intersecting edges, thus forming the contact surface between the assembly portion 2 and the housing 1. The use of circular arc transitions can improve the integrity and smoothness of the surface. An extension portion 21 is provided on the back of the assembly portion 2, extending away from the contact surface.

[0039] The wheel assembly 3 includes a base 31 , and wheels 32 are respectively provided on both sides of the base 31 .

[0040] The assembly portion 2 and the extension portion 21 are an integrally formed structure. The integral structure is easy to process, and the assembly portion 2 and the extension portion 21 can be integrally injection molded.

[0041] The assembly portion 2 is a solid structure. The solid structure of the assembly portion 2 can improve the strength of the assembly portion 2, thereby improving the supporting force of the entire roller assembly.

[0042] like Figure 4 and Figure 5As shown, the roller structure of the present invention is mounted at the four corners of the bottom of the luggage body 1. Its mounting portion 2 fits snugly and securely with the body 1, distributing wheels 32 at the four corners. The extension portion 21, offset from the longitudinal axis of the mounting portion 2, causes the wheels 32 to extend beyond the projected surface of the body 1. This increases the spacing between the wheels 32, and thus the area enclosed by the contact points between the wheels 32 and the contact surface. This increased projected contact area enhances the stability of the luggage during pushing. Using the roller structure of the present invention, the luggage body 1 can retain the rectangular parallelepiped structure used by most current luggage cases, saving manufacturing costs compared to irregularly shaped cases while maintaining the regularity of the storage space within the body 1.

[0043] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller structure for a luggage case, comprising a roller body, characterized by: The roller body comprises an assembly portion (2) adapted to the box body (1) and a wheel assembly (3); the assembly portion (2) is provided with an extension portion (21) whose end surface (21a) deviates from the longitudinal axis of the assembly portion (2); and the wheel assembly (3) is rotatably connected to the end of the extension portion (21).

2. The roller structure of a luggage case according to claim 1, characterized in that: The extension portion (21) is a tapered structure that is larger at the top and smaller at the bottom.

3. The roller structure of a luggage case according to claim 2, characterized in that: The extension portion (21) extends outward and downward, so that the end surface (21a) of the extension portion (21) is arranged horizontally.

4. The roller structure of a luggage case according to claim 3, characterized in that: The assembly portion (2) comprises a top surface (2a) and two side surfaces (2b), and the top surfaces (2a) and the side surfaces (2b) are both arc transitions.

5. The roller structure of a luggage case according to claim 4, characterized in that: The top surface (2a) is arranged horizontally, and the side surface (2b) is arranged vertically.

6. The roller structure of a luggage case according to claim 5, characterized in that: The two side surfaces (2b) are perpendicular to each other.

7. The roller structure of a luggage case according to claim 6, characterized in that: The top surface (2a) is a fan-shaped structure.

8. The roller structure for a luggage case according to claim 7, characterized in that: The wheel assembly (3) comprises a base (31), and wheels (32) are respectively provided on both sides of the base (31).

9. The roller structure of a luggage case according to claim 8, characterized in that: The assembly portion (2) and the extension portion (21) are an integrally formed structure.

10. The roller structure of a luggage case according to claim 9, characterized in that: The assembly part (2) is a solid structure.

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